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-rw-r--r--kernel/arch/cris/arch-v32/drivers/Kconfig430
-rw-r--r--kernel/arch/cris/arch-v32/drivers/Makefile12
-rw-r--r--kernel/arch/cris/arch-v32/drivers/axisflashmap.c619
-rw-r--r--kernel/arch/cris/arch-v32/drivers/cryptocop.c3536
-rw-r--r--kernel/arch/cris/arch-v32/drivers/i2c.c751
-rw-r--r--kernel/arch/cris/arch-v32/drivers/i2c.h16
-rw-r--r--kernel/arch/cris/arch-v32/drivers/iop_fw_load.c230
-rw-r--r--kernel/arch/cris/arch-v32/drivers/mach-a3/Makefile6
-rw-r--r--kernel/arch/cris/arch-v32/drivers/mach-a3/gpio.c999
-rw-r--r--kernel/arch/cris/arch-v32/drivers/mach-a3/nandflash.c180
-rw-r--r--kernel/arch/cris/arch-v32/drivers/mach-fs/Makefile6
-rw-r--r--kernel/arch/cris/arch-v32/drivers/mach-fs/gpio.c979
-rw-r--r--kernel/arch/cris/arch-v32/drivers/mach-fs/nandflash.c174
-rw-r--r--kernel/arch/cris/arch-v32/drivers/pci/Makefile5
-rw-r--r--kernel/arch/cris/arch-v32/drivers/pci/bios.c99
-rw-r--r--kernel/arch/cris/arch-v32/drivers/pci/dma.c50
-rw-r--r--kernel/arch/cris/arch-v32/drivers/sync_serial.c1709
17 files changed, 9801 insertions, 0 deletions
diff --git a/kernel/arch/cris/arch-v32/drivers/Kconfig b/kernel/arch/cris/arch-v32/drivers/Kconfig
new file mode 100644
index 000000000..4fc16b44f
--- /dev/null
+++ b/kernel/arch/cris/arch-v32/drivers/Kconfig
@@ -0,0 +1,430 @@
+if ETRAX_ARCH_V32
+
+config ETRAX_ETHERNET
+ bool "Ethernet support"
+ depends on ETRAX_ARCH_V32 && NETDEVICES
+ select MII
+ help
+ This option enables the ETRAX FS built-in 10/100Mbit Ethernet
+ controller.
+
+config ETRAX_NO_PHY
+ bool "PHY not present"
+ depends on ETRAX_ETHERNET
+ help
+ This option disables all MDIO communication with an ethernet
+ transceiver connected to the MII interface. This option shall
+ typically be enabled if the MII interface is connected to a
+ switch. This option should normally be disabled. If enabled,
+ speed and duplex will be locked to 100 Mbit and full duplex.
+
+config ETRAXFS_SERIAL
+ bool "Serial-port support"
+ depends on ETRAX_ARCH_V32
+ select SERIAL_CORE
+ select SERIAL_CORE_CONSOLE
+ help
+ Enables the ETRAX FS serial driver for ser0 (ttyS0)
+ You probably want this enabled.
+
+config ETRAX_RS485
+ bool "RS-485 support"
+ depends on ETRAXFS_SERIAL
+ help
+ Enables support for RS-485 serial communication.
+
+config ETRAX_RS485_DISABLE_RECEIVER
+ bool "Disable serial receiver"
+ depends on ETRAX_RS485
+ help
+ It is necessary to disable the serial receiver to avoid serial
+ loopback. Not all products are able to do this in software only.
+
+config ETRAX_SERIAL_PORT0
+ bool "Serial port 0 enabled"
+ depends on ETRAXFS_SERIAL
+ help
+ Enables the ETRAX FS serial driver for ser0 (ttyS0)
+ Normally you want this on. You can control what DMA channels to use
+ if you do not need DMA to something else.
+ ser0 can use dma4 or dma6 for output and dma5 or dma7 for input.
+
+config ETRAX_SERIAL_PORT1
+ bool "Serial port 1 enabled"
+ depends on ETRAXFS_SERIAL
+ help
+ Enables the ETRAX FS serial driver for ser1 (ttyS1).
+
+config ETRAX_SERIAL_PORT2
+ bool "Serial port 2 enabled"
+ depends on ETRAXFS_SERIAL
+ help
+ Enables the ETRAX FS serial driver for ser2 (ttyS2).
+
+config ETRAX_SERIAL_PORT3
+ bool "Serial port 3 enabled"
+ depends on ETRAXFS_SERIAL
+ help
+ Enables the ETRAX FS serial driver for ser3 (ttyS3).
+
+config ETRAX_SYNCHRONOUS_SERIAL
+ bool "Synchronous serial-port support"
+ depends on ETRAX_ARCH_V32
+ help
+ Enables the ETRAX FS synchronous serial driver.
+
+config ETRAX_SYNCHRONOUS_SERIAL_PORT0
+ bool "Synchronous serial port 0 enabled"
+ depends on ETRAX_SYNCHRONOUS_SERIAL
+ help
+ Enabled synchronous serial port 0.
+
+config ETRAX_SYNCHRONOUS_SERIAL0_DMA
+ bool "Enable DMA on synchronous serial port 0."
+ depends on ETRAX_SYNCHRONOUS_SERIAL_PORT0
+ help
+ A synchronous serial port can run in manual or DMA mode.
+ Selecting this option will make it run in DMA mode.
+
+config ETRAX_SYNCHRONOUS_SERIAL_PORT1
+ bool "Synchronous serial port 1 enabled"
+ depends on ETRAX_SYNCHRONOUS_SERIAL && ETRAXFS
+ help
+ Enabled synchronous serial port 1.
+
+config ETRAX_SYNCHRONOUS_SERIAL1_DMA
+ bool "Enable DMA on synchronous serial port 1."
+ depends on ETRAX_SYNCHRONOUS_SERIAL_PORT1
+ help
+ A synchronous serial port can run in manual or DMA mode.
+ Selecting this option will make it run in DMA mode.
+
+config ETRAX_AXISFLASHMAP
+ bool "Axis flash-map support"
+ depends on ETRAX_ARCH_V32
+ select MTD
+ select MTD_CFI
+ select MTD_CFI_AMDSTD
+ select MTD_JEDECPROBE
+ select MTD_BLOCK
+ select MTD_COMPLEX_MAPPINGS
+ select MTD_MTDRAM
+ help
+ This option enables MTD mapping of flash devices. Needed to use
+ flash memories. If unsure, say Y.
+
+config ETRAX_AXISFLASHMAP_MTD0WHOLE
+ bool "MTD0 is whole boot flash device"
+ depends on ETRAX_AXISFLASHMAP
+ help
+ When this option is not set, mtd0 refers to the first partition
+ on the boot flash device. When set, mtd0 refers to the whole
+ device, with mtd1 referring to the first partition etc.
+
+config ETRAX_PTABLE_SECTOR
+ int "Byte-offset of partition table sector"
+ depends on ETRAX_AXISFLASHMAP
+ default "65536"
+ help
+ Byte-offset of the partition table in the first flash chip.
+ The default value is 64kB and should not be changed unless
+ you know exactly what you are doing. The only valid reason
+ for changing this is when the flash block size is bigger
+ than 64kB (e.g. when using two parallel 16 bit flashes).
+
+config ETRAX_NANDFLASH
+ bool "NAND flash support"
+ depends on ETRAX_ARCH_V32
+ select MTD_NAND
+ select MTD_NAND_IDS
+ help
+ This option enables MTD mapping of NAND flash devices. Needed to use
+ NAND flash memories. If unsure, say Y.
+
+config ETRAX_NANDBOOT
+ bool "Boot from NAND flash"
+ depends on ETRAX_NANDFLASH
+ help
+ This options enables booting from NAND flash devices.
+ Say Y if your boot code, kernel and root file system is in
+ NAND flash. Say N if they are in NOR flash.
+
+config ETRAX_I2C
+ bool "I2C driver"
+ depends on ETRAX_ARCH_V32
+ help
+ This option enables the I2C driver used by e.g. the RTC driver.
+
+config ETRAX_V32_I2C_DATA_PORT
+ string "I2C data pin"
+ depends on ETRAX_I2C
+ help
+ The pin to use for I2C data.
+
+config ETRAX_V32_I2C_CLK_PORT
+ string "I2C clock pin"
+ depends on ETRAX_I2C
+ help
+ The pin to use for I2C clock.
+
+config ETRAX_GPIO
+ bool "GPIO support"
+ depends on ETRAX_ARCH_V32
+ ---help---
+ Enables the ETRAX general port device (major 120, minors 0-4).
+ You can use this driver to access the general port bits. It supports
+ these ioctl's:
+ #include <linux/etraxgpio.h>
+ fd = open("/dev/gpioa", O_RDWR); // or /dev/gpiob
+ ioctl(fd, _IO(ETRAXGPIO_IOCTYPE, IO_SETBITS), bits_to_set);
+ ioctl(fd, _IO(ETRAXGPIO_IOCTYPE, IO_CLRBITS), bits_to_clear);
+ err = ioctl(fd, _IO(ETRAXGPIO_IOCTYPE, IO_READ_INBITS), &val);
+ Remember that you need to setup the port directions appropriately in
+ the General configuration.
+
+config ETRAX_VIRTUAL_GPIO
+ bool "Virtual GPIO support"
+ depends on ETRAX_GPIO
+ help
+ Enables the virtual Etrax general port device (major 120, minor 6).
+ It uses an I/O expander for the I2C-bus.
+
+config ETRAX_VIRTUAL_GPIO_INTERRUPT_PA_PIN
+ int "Virtual GPIO interrupt pin on PA pin"
+ range 0 7
+ depends on ETRAX_VIRTUAL_GPIO
+ help
+ The pin to use on PA for virtual gpio interrupt.
+
+config ETRAX_PA_CHANGEABLE_DIR
+ hex "PA user changeable dir mask"
+ depends on ETRAX_GPIO
+ default "0x00" if ETRAXFS
+ default "0x00000000" if !ETRAXFS
+ help
+ This is a bitmask (8 bits) with information of what bits in PA that a
+ user can change direction on using ioctl's.
+ Bit set = changeable.
+ You probably want 0 here, but it depends on your hardware.
+
+config ETRAX_PA_CHANGEABLE_BITS
+ hex "PA user changeable bits mask"
+ depends on ETRAX_GPIO
+ default "0x00" if ETRAXFS
+ default "0x00000000" if !ETRAXFS
+ help
+ This is a bitmask (8 bits) with information of what bits in PA
+ that a user can change the value on using ioctl's.
+ Bit set = changeable.
+
+config ETRAX_PB_CHANGEABLE_DIR
+ hex "PB user changeable dir mask"
+ depends on ETRAX_GPIO
+ default "0x00000" if ETRAXFS
+ default "0x00000000" if !ETRAXFS
+ help
+ This is a bitmask (18 bits) with information of what bits in PB
+ that a user can change direction on using ioctl's.
+ Bit set = changeable.
+ You probably want 0 here, but it depends on your hardware.
+
+config ETRAX_PB_CHANGEABLE_BITS
+ hex "PB user changeable bits mask"
+ depends on ETRAX_GPIO
+ default "0x00000" if ETRAXFS
+ default "0x00000000" if !ETRAXFS
+ help
+ This is a bitmask (18 bits) with information of what bits in PB
+ that a user can change the value on using ioctl's.
+ Bit set = changeable.
+
+config ETRAX_PC_CHANGEABLE_DIR
+ hex "PC user changeable dir mask"
+ depends on ETRAX_GPIO
+ default "0x00000" if ETRAXFS
+ default "0x00000000" if !ETRAXFS
+ help
+ This is a bitmask (18 bits) with information of what bits in PC
+ that a user can change direction on using ioctl's.
+ Bit set = changeable.
+ You probably want 0 here, but it depends on your hardware.
+
+config ETRAX_PC_CHANGEABLE_BITS
+ hex "PC user changeable bits mask"
+ depends on ETRAX_GPIO
+ default "0x00000" if ETRAXFS
+ default "0x00000000" if ETRAXFS
+ help
+ This is a bitmask (18 bits) with information of what bits in PC
+ that a user can change the value on using ioctl's.
+ Bit set = changeable.
+
+config ETRAX_PD_CHANGEABLE_DIR
+ hex "PD user changeable dir mask"
+ depends on ETRAX_GPIO && ETRAXFS
+ default "0x00000"
+ help
+ This is a bitmask (18 bits) with information of what bits in PD
+ that a user can change direction on using ioctl's.
+ Bit set = changeable.
+ You probably want 0x00000 here, but it depends on your hardware.
+
+config ETRAX_PD_CHANGEABLE_BITS
+ hex "PD user changeable bits mask"
+ depends on ETRAX_GPIO && ETRAXFS
+ default "0x00000"
+ help
+ This is a bitmask (18 bits) with information of what bits in PD
+ that a user can change the value on using ioctl's.
+ Bit set = changeable.
+
+config ETRAX_PE_CHANGEABLE_DIR
+ hex "PE user changeable dir mask"
+ depends on ETRAX_GPIO && ETRAXFS
+ default "0x00000"
+ help
+ This is a bitmask (18 bits) with information of what bits in PE
+ that a user can change direction on using ioctl's.
+ Bit set = changeable.
+ You probably want 0x00000 here, but it depends on your hardware.
+
+config ETRAX_PE_CHANGEABLE_BITS
+ hex "PE user changeable bits mask"
+ depends on ETRAX_GPIO && ETRAXFS
+ default "0x00000"
+ help
+ This is a bitmask (18 bits) with information of what bits in PE
+ that a user can change the value on using ioctl's.
+ Bit set = changeable.
+
+config ETRAX_PV_CHANGEABLE_DIR
+ hex "PV user changeable dir mask"
+ depends on ETRAX_VIRTUAL_GPIO
+ default "0x0000"
+ help
+ This is a bitmask (16 bits) with information of what bits in PV
+ that a user can change direction on using ioctl's.
+ Bit set = changeable.
+ You probably want 0x0000 here, but it depends on your hardware.
+
+config ETRAX_PV_CHANGEABLE_BITS
+ hex "PV user changeable bits mask"
+ depends on ETRAX_VIRTUAL_GPIO
+ default "0x0000"
+ help
+ This is a bitmask (16 bits) with information of what bits in PV
+ that a user can change the value on using ioctl's.
+ Bit set = changeable.
+
+config ETRAX_CARDBUS
+ bool "Cardbus support"
+ depends on ETRAX_ARCH_V32
+ help
+ Enabled the ETRAX Cardbus driver.
+
+config PCI
+ bool
+ depends on ETRAX_CARDBUS
+ default y
+ select HAVE_GENERIC_DMA_COHERENT
+
+config ETRAX_IOP_FW_LOAD
+ tristate "IO-processor hotplug firmware loading support"
+ depends on ETRAX_ARCH_V32
+ select FW_LOADER
+ help
+ Enables IO-processor hotplug firmware loading support.
+
+config ETRAX_STREAMCOPROC
+ tristate "Stream co-processor driver enabled"
+ depends on ETRAX_ARCH_V32
+ help
+ This option enables a driver for the stream co-processor
+ for cryptographic operations.
+
+config ETRAX_MMC_IOP
+ tristate "MMC/SD host driver using IO-processor"
+ depends on ETRAX_ARCH_V32 && MMC
+ help
+ This option enables the SD/MMC host controller interface.
+ The host controller is implemented using the built in
+ IO-Processor. Only the SPU is used in this implementation.
+
+config ETRAX_SPI_MMC
+# Make this one of several "choices" (possible simultaneously but
+# suggested uniquely) when an IOP driver emerges for "real" MMC/SD
+# protocol support.
+ tristate
+ depends on !ETRAX_MMC_IOP
+ default MMC
+ select SPI
+ select MMC_SPI
+
+# While the board info is MMC_SPI only, the drivers are written to be
+# independent of MMC_SPI, so we'll keep SPI non-dependent on the
+# MMC_SPI config choices (well, except for a single depends-on-line
+# for the board-info file until a separate non-MMC SPI board file
+# emerges).
+# FIXME: When that happens, we'll need to be able to ask for and
+# configure non-MMC SPI ports together with MMC_SPI ports (if multiple
+# SPI ports are enabled).
+
+config SPI_ETRAX_SSER
+ tristate
+ depends on SPI_MASTER && ETRAX_ARCH_V32
+ select SPI_BITBANG
+ help
+ This enables using an synchronous serial (sser) port as a
+ SPI master controller on Axis ETRAX FS and later. The
+ driver can be configured to use any sser port.
+
+config SPI_ETRAX_GPIO
+ tristate
+ depends on SPI_MASTER && ETRAX_ARCH_V32
+ select SPI_BITBANG
+ help
+ This enables using GPIO pins port as a SPI master controller
+ on Axis ETRAX FS and later. The driver can be configured to
+ use any GPIO pins.
+
+config ETRAX_SPI_SSER0
+ tristate "SPI using synchronous serial port 0 (sser0)"
+ depends on ETRAX_SPI_MMC
+ default m if MMC_SPI=m
+ default y if MMC_SPI=y
+ default y if MMC_SPI=n
+ select SPI_ETRAX_SSER
+ help
+ Say Y for an MMC/SD socket connected to synchronous serial port 0,
+ or for devices using the SPI protocol on that port. Say m if you
+ want to build it as a module, which will be named spi_crisv32_sser.
+ (You need to select MMC separately.)
+
+config ETRAX_SPI_SSER1
+ tristate "SPI using synchronous serial port 1 (sser1)"
+ depends on ETRAX_SPI_MMC
+ default m if MMC_SPI=m && ETRAX_SPI_SSER0=n
+ default y if MMC_SPI=y && ETRAX_SPI_SSER0=n
+ default y if MMC_SPI=n && ETRAX_SPI_SSER0=n
+ select SPI_ETRAX_SSER
+ help
+ Say Y for an MMC/SD socket connected to synchronous serial port 1,
+ or for devices using the SPI protocol on that port. Say m if you
+ want to build it as a module, which will be named spi_crisv32_sser.
+ (You need to select MMC separately.)
+
+config ETRAX_SPI_GPIO
+ tristate "Bitbanged SPI using gpio pins"
+ depends on ETRAX_SPI_MMC
+ select SPI_ETRAX_GPIO
+ default m if MMC_SPI=m && ETRAX_SPI_SSER0=n && ETRAX_SPI_SSER1=n
+ default y if MMC_SPI=y && ETRAX_SPI_SSER0=n && ETRAX_SPI_SSER1=n
+ default y if MMC_SPI=n && ETRAX_SPI_SSER0=n && ETRAX_SPI_SSER1=n
+ help
+ Say Y for an MMC/SD socket connected to general I/O pins (but not
+ a complete synchronous serial ports), or for devices using the SPI
+ protocol on general I/O pins. Slow and slows down the system.
+ Say m to build it as a module, which will be called spi_crisv32_gpio.
+ (You need to select MMC separately.)
+
+endif
diff --git a/kernel/arch/cris/arch-v32/drivers/Makefile b/kernel/arch/cris/arch-v32/drivers/Makefile
new file mode 100644
index 000000000..15fbfefce
--- /dev/null
+++ b/kernel/arch/cris/arch-v32/drivers/Makefile
@@ -0,0 +1,12 @@
+#
+# Makefile for Etrax-specific drivers
+#
+
+obj-$(CONFIG_ETRAX_STREAMCOPROC) += cryptocop.o
+obj-$(CONFIG_ETRAX_AXISFLASHMAP) += axisflashmap.o
+obj-$(CONFIG_ETRAXFS) += mach-fs/
+obj-$(CONFIG_CRIS_MACH_ARTPEC3) += mach-a3/
+obj-$(CONFIG_ETRAX_IOP_FW_LOAD) += iop_fw_load.o
+obj-$(CONFIG_ETRAX_I2C) += i2c.o
+obj-$(CONFIG_ETRAX_SYNCHRONOUS_SERIAL) += sync_serial.o
+obj-$(CONFIG_PCI) += pci/
diff --git a/kernel/arch/cris/arch-v32/drivers/axisflashmap.c b/kernel/arch/cris/arch-v32/drivers/axisflashmap.c
new file mode 100644
index 000000000..28dd77144
--- /dev/null
+++ b/kernel/arch/cris/arch-v32/drivers/axisflashmap.c
@@ -0,0 +1,619 @@
+/*
+ * Physical mapping layer for MTD using the Axis partitiontable format
+ *
+ * Copyright (c) 2001-2007 Axis Communications AB
+ *
+ * This file is under the GPL.
+ *
+ * First partition is always sector 0 regardless of if we find a partitiontable
+ * or not. In the start of the next sector, there can be a partitiontable that
+ * tells us what other partitions to define. If there isn't, we use a default
+ * partition split defined below.
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/types.h>
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/slab.h>
+
+#include <linux/mtd/concat.h>
+#include <linux/mtd/map.h>
+#include <linux/mtd/mtd.h>
+#include <linux/mtd/mtdram.h>
+#include <linux/mtd/partitions.h>
+
+#include <asm/axisflashmap.h>
+#include <asm/mmu.h>
+
+#define MEM_CSE0_SIZE (0x04000000)
+#define MEM_CSE1_SIZE (0x04000000)
+
+#define FLASH_UNCACHED_ADDR KSEG_E
+#define FLASH_CACHED_ADDR KSEG_F
+
+#define PAGESIZE (512)
+
+#if CONFIG_ETRAX_FLASH_BUSWIDTH==1
+#define flash_data __u8
+#elif CONFIG_ETRAX_FLASH_BUSWIDTH==2
+#define flash_data __u16
+#elif CONFIG_ETRAX_FLASH_BUSWIDTH==4
+#define flash_data __u32
+#endif
+
+/* From head.S */
+extern unsigned long romfs_in_flash; /* 1 when romfs_start, _length in flash */
+extern unsigned long romfs_start, romfs_length;
+extern unsigned long nand_boot; /* 1 when booted from nand flash */
+
+struct partition_name {
+ char name[6];
+};
+
+/* The master mtd for the entire flash. */
+struct mtd_info* axisflash_mtd = NULL;
+
+/* Map driver functions. */
+
+static map_word flash_read(struct map_info *map, unsigned long ofs)
+{
+ map_word tmp;
+ tmp.x[0] = *(flash_data *)(map->map_priv_1 + ofs);
+ return tmp;
+}
+
+static void flash_copy_from(struct map_info *map, void *to,
+ unsigned long from, ssize_t len)
+{
+ memcpy(to, (void *)(map->map_priv_1 + from), len);
+}
+
+static void flash_write(struct map_info *map, map_word d, unsigned long adr)
+{
+ *(flash_data *)(map->map_priv_1 + adr) = (flash_data)d.x[0];
+}
+
+/*
+ * The map for chip select e0.
+ *
+ * We run into tricky coherence situations if we mix cached with uncached
+ * accesses to we only use the uncached version here.
+ *
+ * The size field is the total size where the flash chips may be mapped on the
+ * chip select. MTD probes should find all devices there and it does not matter
+ * if there are unmapped gaps or aliases (mirrors of flash devices). The MTD
+ * probes will ignore them.
+ *
+ * The start address in map_priv_1 is in virtual memory so we cannot use
+ * MEM_CSE0_START but must rely on that FLASH_UNCACHED_ADDR is the start
+ * address of cse0.
+ */
+static struct map_info map_cse0 = {
+ .name = "cse0",
+ .size = MEM_CSE0_SIZE,
+ .bankwidth = CONFIG_ETRAX_FLASH_BUSWIDTH,
+ .read = flash_read,
+ .copy_from = flash_copy_from,
+ .write = flash_write,
+ .map_priv_1 = FLASH_UNCACHED_ADDR
+};
+
+/*
+ * The map for chip select e1.
+ *
+ * If there was a gap between cse0 and cse1, map_priv_1 would get the wrong
+ * address, but there isn't.
+ */
+static struct map_info map_cse1 = {
+ .name = "cse1",
+ .size = MEM_CSE1_SIZE,
+ .bankwidth = CONFIG_ETRAX_FLASH_BUSWIDTH,
+ .read = flash_read,
+ .copy_from = flash_copy_from,
+ .write = flash_write,
+ .map_priv_1 = FLASH_UNCACHED_ADDR + MEM_CSE0_SIZE
+};
+
+#define MAX_PARTITIONS 7
+#ifdef CONFIG_ETRAX_NANDBOOT
+#define NUM_DEFAULT_PARTITIONS 4
+#define DEFAULT_ROOTFS_PARTITION_NO 2
+#define DEFAULT_MEDIA_SIZE 0x2000000 /* 32 megs */
+#else
+#define NUM_DEFAULT_PARTITIONS 3
+#define DEFAULT_ROOTFS_PARTITION_NO (-1)
+#define DEFAULT_MEDIA_SIZE 0x800000 /* 8 megs */
+#endif
+
+#if (MAX_PARTITIONS < NUM_DEFAULT_PARTITIONS)
+#error MAX_PARTITIONS must be >= than NUM_DEFAULT_PARTITIONS
+#endif
+
+/* Initialize the ones normally used. */
+static struct mtd_partition axis_partitions[MAX_PARTITIONS] = {
+ {
+ .name = "part0",
+ .size = CONFIG_ETRAX_PTABLE_SECTOR,
+ .offset = 0
+ },
+ {
+ .name = "part1",
+ .size = 0,
+ .offset = 0
+ },
+ {
+ .name = "part2",
+ .size = 0,
+ .offset = 0
+ },
+ {
+ .name = "part3",
+ .size = 0,
+ .offset = 0
+ },
+ {
+ .name = "part4",
+ .size = 0,
+ .offset = 0
+ },
+ {
+ .name = "part5",
+ .size = 0,
+ .offset = 0
+ },
+ {
+ .name = "part6",
+ .size = 0,
+ .offset = 0
+ },
+};
+
+
+/* If no partition-table was found, we use this default-set.
+ * Default flash size is 8MB (NOR). CONFIG_ETRAX_PTABLE_SECTOR is most
+ * likely the size of one flash block and "filesystem"-partition needs
+ * to be >=5 blocks to be able to use JFFS.
+ */
+static struct mtd_partition axis_default_partitions[NUM_DEFAULT_PARTITIONS] = {
+ {
+ .name = "boot firmware",
+ .size = CONFIG_ETRAX_PTABLE_SECTOR,
+ .offset = 0
+ },
+ {
+ .name = "kernel",
+ .size = 10 * CONFIG_ETRAX_PTABLE_SECTOR,
+ .offset = CONFIG_ETRAX_PTABLE_SECTOR
+ },
+#define FILESYSTEM_SECTOR (11 * CONFIG_ETRAX_PTABLE_SECTOR)
+#ifdef CONFIG_ETRAX_NANDBOOT
+ {
+ .name = "rootfs",
+ .size = 10 * CONFIG_ETRAX_PTABLE_SECTOR,
+ .offset = FILESYSTEM_SECTOR
+ },
+#undef FILESYSTEM_SECTOR
+#define FILESYSTEM_SECTOR (21 * CONFIG_ETRAX_PTABLE_SECTOR)
+#endif
+ {
+ .name = "rwfs",
+ .size = DEFAULT_MEDIA_SIZE - FILESYSTEM_SECTOR,
+ .offset = FILESYSTEM_SECTOR
+ }
+};
+
+#ifdef CONFIG_ETRAX_AXISFLASHMAP_MTD0WHOLE
+/* Main flash device */
+static struct mtd_partition main_partition = {
+ .name = "main",
+ .size = 0,
+ .offset = 0
+};
+#endif
+
+/* Auxiliary partition if we find another flash */
+static struct mtd_partition aux_partition = {
+ .name = "aux",
+ .size = 0,
+ .offset = 0
+};
+
+/*
+ * Probe a chip select for AMD-compatible (JEDEC) or CFI-compatible flash
+ * chips in that order (because the amd_flash-driver is faster).
+ */
+static struct mtd_info *probe_cs(struct map_info *map_cs)
+{
+ struct mtd_info *mtd_cs = NULL;
+
+ printk(KERN_INFO
+ "%s: Probing a 0x%08lx bytes large window at 0x%08lx.\n",
+ map_cs->name, map_cs->size, map_cs->map_priv_1);
+
+#ifdef CONFIG_MTD_CFI
+ mtd_cs = do_map_probe("cfi_probe", map_cs);
+#endif
+#ifdef CONFIG_MTD_JEDECPROBE
+ if (!mtd_cs)
+ mtd_cs = do_map_probe("jedec_probe", map_cs);
+#endif
+
+ return mtd_cs;
+}
+
+/*
+ * Probe each chip select individually for flash chips. If there are chips on
+ * both cse0 and cse1, the mtd_info structs will be concatenated to one struct
+ * so that MTD partitions can cross chip boundries.
+ *
+ * The only known restriction to how you can mount your chips is that each
+ * chip select must hold similar flash chips. But you need external hardware
+ * to do that anyway and you can put totally different chips on cse0 and cse1
+ * so it isn't really much of a restriction.
+ */
+extern struct mtd_info* __init crisv32_nand_flash_probe (void);
+static struct mtd_info *flash_probe(void)
+{
+ struct mtd_info *mtd_cse0;
+ struct mtd_info *mtd_cse1;
+ struct mtd_info *mtd_total;
+ struct mtd_info *mtds[2];
+ int count = 0;
+
+ if ((mtd_cse0 = probe_cs(&map_cse0)) != NULL)
+ mtds[count++] = mtd_cse0;
+ if ((mtd_cse1 = probe_cs(&map_cse1)) != NULL)
+ mtds[count++] = mtd_cse1;
+
+ if (!mtd_cse0 && !mtd_cse1) {
+ /* No chip found. */
+ return NULL;
+ }
+
+ if (count > 1) {
+ /* Since the concatenation layer adds a small overhead we
+ * could try to figure out if the chips in cse0 and cse1 are
+ * identical and reprobe the whole cse0+cse1 window. But since
+ * flash chips are slow, the overhead is relatively small.
+ * So we use the MTD concatenation layer instead of further
+ * complicating the probing procedure.
+ */
+ mtd_total = mtd_concat_create(mtds, count, "cse0+cse1");
+ if (!mtd_total) {
+ printk(KERN_ERR "%s and %s: Concatenation failed!\n",
+ map_cse0.name, map_cse1.name);
+
+ /* The best we can do now is to only use what we found
+ * at cse0. */
+ mtd_total = mtd_cse0;
+ map_destroy(mtd_cse1);
+ }
+ } else
+ mtd_total = mtd_cse0 ? mtd_cse0 : mtd_cse1;
+
+ return mtd_total;
+}
+
+/*
+ * Probe the flash chip(s) and, if it succeeds, read the partition-table
+ * and register the partitions with MTD.
+ */
+static int __init init_axis_flash(void)
+{
+ struct mtd_info *main_mtd;
+ struct mtd_info *aux_mtd = NULL;
+ int err = 0;
+ int pidx = 0;
+ struct partitiontable_head *ptable_head = NULL;
+ struct partitiontable_entry *ptable;
+ int ptable_ok = 0;
+ static char page[PAGESIZE];
+ size_t len;
+ int ram_rootfs_partition = -1; /* -1 => no RAM rootfs partition */
+ int part;
+
+ /* We need a root fs. If it resides in RAM, we need to use an
+ * MTDRAM device, so it must be enabled in the kernel config,
+ * but its size must be configured as 0 so as not to conflict
+ * with our usage.
+ */
+#if !defined(CONFIG_MTD_MTDRAM) || (CONFIG_MTDRAM_TOTAL_SIZE != 0) || (CONFIG_MTDRAM_ABS_POS != 0)
+ if (!romfs_in_flash && !nand_boot) {
+ printk(KERN_EMERG "axisflashmap: Cannot create an MTD RAM "
+ "device; configure CONFIG_MTD_MTDRAM with size = 0!\n");
+ panic("This kernel cannot boot from RAM!\n");
+ }
+#endif
+
+ main_mtd = flash_probe();
+ if (main_mtd)
+ printk(KERN_INFO "%s: 0x%08x bytes of NOR flash memory.\n",
+ main_mtd->name, main_mtd->size);
+
+#ifdef CONFIG_ETRAX_NANDFLASH
+ aux_mtd = crisv32_nand_flash_probe();
+ if (aux_mtd)
+ printk(KERN_INFO "%s: 0x%08x bytes of NAND flash memory.\n",
+ aux_mtd->name, aux_mtd->size);
+
+#ifdef CONFIG_ETRAX_NANDBOOT
+ {
+ struct mtd_info *tmp_mtd;
+
+ printk(KERN_INFO "axisflashmap: Set to boot from NAND flash, "
+ "making NAND flash primary device.\n");
+ tmp_mtd = main_mtd;
+ main_mtd = aux_mtd;
+ aux_mtd = tmp_mtd;
+ }
+#endif /* CONFIG_ETRAX_NANDBOOT */
+#endif /* CONFIG_ETRAX_NANDFLASH */
+
+ if (!main_mtd && !aux_mtd) {
+ /* There's no reason to use this module if no flash chip can
+ * be identified. Make sure that's understood.
+ */
+ printk(KERN_INFO "axisflashmap: Found no flash chip.\n");
+ }
+
+#if 0 /* Dump flash memory so we can see what is going on */
+ if (main_mtd) {
+ int sectoraddr, i;
+ for (sectoraddr = 0; sectoraddr < 2*65536+4096;
+ sectoraddr += PAGESIZE) {
+ main_mtd->read(main_mtd, sectoraddr, PAGESIZE, &len,
+ page);
+ printk(KERN_INFO
+ "Sector at %d (length %d):\n",
+ sectoraddr, len);
+ for (i = 0; i < PAGESIZE; i += 16) {
+ printk(KERN_INFO
+ "%02x %02x %02x %02x "
+ "%02x %02x %02x %02x "
+ "%02x %02x %02x %02x "
+ "%02x %02x %02x %02x\n",
+ page[i] & 255, page[i+1] & 255,
+ page[i+2] & 255, page[i+3] & 255,
+ page[i+4] & 255, page[i+5] & 255,
+ page[i+6] & 255, page[i+7] & 255,
+ page[i+8] & 255, page[i+9] & 255,
+ page[i+10] & 255, page[i+11] & 255,
+ page[i+12] & 255, page[i+13] & 255,
+ page[i+14] & 255, page[i+15] & 255);
+ }
+ }
+ }
+#endif
+
+ if (main_mtd) {
+ main_mtd->owner = THIS_MODULE;
+ axisflash_mtd = main_mtd;
+
+ loff_t ptable_sector = CONFIG_ETRAX_PTABLE_SECTOR;
+
+ /* First partition (rescue) is always set to the default. */
+ pidx++;
+#ifdef CONFIG_ETRAX_NANDBOOT
+ /* We know where the partition table should be located,
+ * it will be in first good block after that.
+ */
+ int blockstat;
+ do {
+ blockstat = mtd_block_isbad(main_mtd, ptable_sector);
+ if (blockstat < 0)
+ ptable_sector = 0; /* read error */
+ else if (blockstat)
+ ptable_sector += main_mtd->erasesize;
+ } while (blockstat && ptable_sector);
+#endif
+ if (ptable_sector) {
+ mtd_read(main_mtd, ptable_sector, PAGESIZE, &len,
+ page);
+ ptable_head = &((struct partitiontable *) page)->head;
+ }
+
+#if 0 /* Dump partition table so we can see what is going on */
+ printk(KERN_INFO
+ "axisflashmap: flash read %d bytes at 0x%08x, data: "
+ "%02x %02x %02x %02x %02x %02x %02x %02x\n",
+ len, CONFIG_ETRAX_PTABLE_SECTOR,
+ page[0] & 255, page[1] & 255,
+ page[2] & 255, page[3] & 255,
+ page[4] & 255, page[5] & 255,
+ page[6] & 255, page[7] & 255);
+ printk(KERN_INFO
+ "axisflashmap: partition table offset %d, data: "
+ "%02x %02x %02x %02x %02x %02x %02x %02x\n",
+ PARTITION_TABLE_OFFSET,
+ page[PARTITION_TABLE_OFFSET+0] & 255,
+ page[PARTITION_TABLE_OFFSET+1] & 255,
+ page[PARTITION_TABLE_OFFSET+2] & 255,
+ page[PARTITION_TABLE_OFFSET+3] & 255,
+ page[PARTITION_TABLE_OFFSET+4] & 255,
+ page[PARTITION_TABLE_OFFSET+5] & 255,
+ page[PARTITION_TABLE_OFFSET+6] & 255,
+ page[PARTITION_TABLE_OFFSET+7] & 255);
+#endif
+ }
+
+ if (ptable_head && (ptable_head->magic == PARTITION_TABLE_MAGIC)
+ && (ptable_head->size <
+ (MAX_PARTITIONS * sizeof(struct partitiontable_entry) +
+ PARTITIONTABLE_END_MARKER_SIZE))
+ && (*(unsigned long*)((void*)ptable_head + sizeof(*ptable_head) +
+ ptable_head->size -
+ PARTITIONTABLE_END_MARKER_SIZE)
+ == PARTITIONTABLE_END_MARKER)) {
+ /* Looks like a start, sane length and end of a
+ * partition table, lets check csum etc.
+ */
+ struct partitiontable_entry *max_addr =
+ (struct partitiontable_entry *)
+ ((unsigned long)ptable_head + sizeof(*ptable_head) +
+ ptable_head->size);
+ unsigned long offset = CONFIG_ETRAX_PTABLE_SECTOR;
+ unsigned char *p;
+ unsigned long csum = 0;
+
+ ptable = (struct partitiontable_entry *)
+ ((unsigned long)ptable_head + sizeof(*ptable_head));
+
+ /* Lets be PARANOID, and check the checksum. */
+ p = (unsigned char*) ptable;
+
+ while (p <= (unsigned char*)max_addr) {
+ csum += *p++;
+ csum += *p++;
+ csum += *p++;
+ csum += *p++;
+ }
+ ptable_ok = (csum == ptable_head->checksum);
+
+ /* Read the entries and use/show the info. */
+ printk(KERN_INFO "axisflashmap: "
+ "Found a%s partition table at 0x%p-0x%p.\n",
+ (ptable_ok ? " valid" : "n invalid"), ptable_head,
+ max_addr);
+
+ /* We have found a working bootblock. Now read the
+ * partition table. Scan the table. It ends with 0xffffffff.
+ */
+ while (ptable_ok
+ && ptable->offset != PARTITIONTABLE_END_MARKER
+ && ptable < max_addr
+ && pidx < MAX_PARTITIONS - 1) {
+
+ axis_partitions[pidx].offset = offset + ptable->offset;
+#ifdef CONFIG_ETRAX_NANDFLASH
+ if (main_mtd->type == MTD_NANDFLASH) {
+ axis_partitions[pidx].size =
+ (((ptable+1)->offset ==
+ PARTITIONTABLE_END_MARKER) ?
+ main_mtd->size :
+ ((ptable+1)->offset + offset)) -
+ (ptable->offset + offset);
+
+ } else
+#endif /* CONFIG_ETRAX_NANDFLASH */
+ axis_partitions[pidx].size = ptable->size;
+#ifdef CONFIG_ETRAX_NANDBOOT
+ /* Save partition number of jffs2 ro partition.
+ * Needed if RAM booting or root file system in RAM.
+ */
+ if (!nand_boot &&
+ ram_rootfs_partition < 0 && /* not already set */
+ ptable->type == PARTITION_TYPE_JFFS2 &&
+ (ptable->flags & PARTITION_FLAGS_READONLY_MASK) ==
+ PARTITION_FLAGS_READONLY)
+ ram_rootfs_partition = pidx;
+#endif /* CONFIG_ETRAX_NANDBOOT */
+ pidx++;
+ ptable++;
+ }
+ }
+
+ /* Decide whether to use default partition table. */
+ /* Only use default table if we actually have a device (main_mtd) */
+
+ struct mtd_partition *partition = &axis_partitions[0];
+ if (main_mtd && !ptable_ok) {
+ memcpy(axis_partitions, axis_default_partitions,
+ sizeof(axis_default_partitions));
+ pidx = NUM_DEFAULT_PARTITIONS;
+ ram_rootfs_partition = DEFAULT_ROOTFS_PARTITION_NO;
+ }
+
+ /* Add artificial partitions for rootfs if necessary */
+ if (romfs_in_flash) {
+ /* rootfs is in directly accessible flash memory = NOR flash.
+ Add an overlapping device for the rootfs partition. */
+ printk(KERN_INFO "axisflashmap: Adding partition for "
+ "overlapping root file system image\n");
+ axis_partitions[pidx].size = romfs_length;
+ axis_partitions[pidx].offset = romfs_start - FLASH_CACHED_ADDR;
+ axis_partitions[pidx].name = "romfs";
+ axis_partitions[pidx].mask_flags |= MTD_WRITEABLE;
+ ram_rootfs_partition = -1;
+ pidx++;
+ } else if (romfs_length && !nand_boot) {
+ /* romfs exists in memory, but not in flash, so must be in RAM.
+ * Configure an MTDRAM partition. */
+ if (ram_rootfs_partition < 0) {
+ /* None set yet, put it at the end */
+ ram_rootfs_partition = pidx;
+ pidx++;
+ }
+ printk(KERN_INFO "axisflashmap: Adding partition for "
+ "root file system image in RAM\n");
+ axis_partitions[ram_rootfs_partition].size = romfs_length;
+ axis_partitions[ram_rootfs_partition].offset = romfs_start;
+ axis_partitions[ram_rootfs_partition].name = "romfs";
+ axis_partitions[ram_rootfs_partition].mask_flags |=
+ MTD_WRITEABLE;
+ }
+
+#ifdef CONFIG_ETRAX_AXISFLASHMAP_MTD0WHOLE
+ if (main_mtd) {
+ main_partition.size = main_mtd->size;
+ err = mtd_device_register(main_mtd, &main_partition, 1);
+ if (err)
+ panic("axisflashmap: Could not initialize "
+ "partition for whole main mtd device!\n");
+ }
+#endif
+
+ /* Now, register all partitions with mtd.
+ * We do this one at a time so we can slip in an MTDRAM device
+ * in the proper place if required. */
+
+ for (part = 0; part < pidx; part++) {
+ if (part == ram_rootfs_partition) {
+ /* add MTDRAM partition here */
+ struct mtd_info *mtd_ram;
+
+ mtd_ram = kmalloc(sizeof(struct mtd_info), GFP_KERNEL);
+ if (!mtd_ram)
+ panic("axisflashmap: Couldn't allocate memory "
+ "for mtd_info!\n");
+ printk(KERN_INFO "axisflashmap: Adding RAM partition "
+ "for rootfs image.\n");
+ err = mtdram_init_device(mtd_ram,
+ (void *)partition[part].offset,
+ partition[part].size,
+ partition[part].name);
+ if (err)
+ panic("axisflashmap: Could not initialize "
+ "MTD RAM device!\n");
+ /* JFFS2 likes to have an erasesize. Keep potential
+ * JFFS2 rootfs happy by providing one. Since image
+ * was most likely created for main mtd, use that
+ * erasesize, if available. Otherwise, make a guess. */
+ mtd_ram->erasesize = (main_mtd ? main_mtd->erasesize :
+ CONFIG_ETRAX_PTABLE_SECTOR);
+ } else {
+ err = mtd_device_register(main_mtd, &partition[part],
+ 1);
+ if (err)
+ panic("axisflashmap: Could not add mtd "
+ "partition %d\n", part);
+ }
+ }
+
+ if (aux_mtd) {
+ aux_partition.size = aux_mtd->size;
+ err = mtd_device_register(aux_mtd, &aux_partition, 1);
+ if (err)
+ panic("axisflashmap: Could not initialize "
+ "aux mtd device!\n");
+
+ }
+
+ return err;
+}
+
+/* This adds the above to the kernels init-call chain. */
+module_init(init_axis_flash);
+
+EXPORT_SYMBOL(axisflash_mtd);
diff --git a/kernel/arch/cris/arch-v32/drivers/cryptocop.c b/kernel/arch/cris/arch-v32/drivers/cryptocop.c
new file mode 100644
index 000000000..877da1908
--- /dev/null
+++ b/kernel/arch/cris/arch-v32/drivers/cryptocop.c
@@ -0,0 +1,3536 @@
+/*
+ * Stream co-processor driver for the ETRAX FS
+ *
+ * Copyright (C) 2003-2007 Axis Communications AB
+ */
+
+#include <linux/init.h>
+#include <linux/sched.h>
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <linux/string.h>
+#include <linux/fs.h>
+#include <linux/mm.h>
+#include <linux/spinlock.h>
+#include <linux/stddef.h>
+
+#include <asm/uaccess.h>
+#include <asm/io.h>
+#include <linux/atomic.h>
+
+#include <linux/list.h>
+#include <linux/interrupt.h>
+
+#include <asm/signal.h>
+#include <asm/irq.h>
+
+#include <dma.h>
+#include <hwregs/dma.h>
+#include <hwregs/reg_map.h>
+#include <hwregs/reg_rdwr.h>
+#include <hwregs/intr_vect_defs.h>
+
+#include <hwregs/strcop.h>
+#include <hwregs/strcop_defs.h>
+#include <cryptocop.h>
+
+#ifdef CONFIG_ETRAXFS
+#define IN_DMA 9
+#define OUT_DMA 8
+#define IN_DMA_INST regi_dma9
+#define OUT_DMA_INST regi_dma8
+#define DMA_IRQ DMA9_INTR_VECT
+#else
+#define IN_DMA 3
+#define OUT_DMA 2
+#define IN_DMA_INST regi_dma3
+#define OUT_DMA_INST regi_dma2
+#define DMA_IRQ DMA3_INTR_VECT
+#endif
+
+#define DESCR_ALLOC_PAD (31)
+
+struct cryptocop_dma_desc {
+ char *free_buf; /* If non-null will be kfreed in free_cdesc() */
+ dma_descr_data *dma_descr;
+
+ unsigned char dma_descr_buf[sizeof(dma_descr_data) + DESCR_ALLOC_PAD];
+
+ unsigned int from_pool:1; /* If 1 'allocated' from the descriptor pool. */
+ struct cryptocop_dma_desc *next;
+};
+
+
+struct cryptocop_int_operation{
+ void *alloc_ptr;
+ cryptocop_session_id sid;
+
+ dma_descr_context ctx_out;
+ dma_descr_context ctx_in;
+
+ /* DMA descriptors allocated by driver. */
+ struct cryptocop_dma_desc *cdesc_out;
+ struct cryptocop_dma_desc *cdesc_in;
+
+ /* Strcop config to use. */
+ cryptocop_3des_mode tdes_mode;
+ cryptocop_csum_type csum_mode;
+
+ /* DMA descrs provided by consumer. */
+ dma_descr_data *ddesc_out;
+ dma_descr_data *ddesc_in;
+};
+
+
+struct cryptocop_tfrm_ctx {
+ cryptocop_tfrm_id tid;
+ unsigned int blocklength;
+
+ unsigned int start_ix;
+
+ struct cryptocop_tfrm_cfg *tcfg;
+ struct cryptocop_transform_ctx *tctx;
+
+ unsigned char previous_src;
+ unsigned char current_src;
+
+ /* Values to use in metadata out. */
+ unsigned char hash_conf;
+ unsigned char hash_mode;
+ unsigned char ciph_conf;
+ unsigned char cbcmode;
+ unsigned char decrypt;
+
+ unsigned int requires_padding:1;
+ unsigned int strict_block_length:1;
+ unsigned int active:1;
+ unsigned int done:1;
+ size_t consumed;
+ size_t produced;
+
+ /* Pad (input) descriptors to put in the DMA out list when the transform
+ * output is put on the DMA in list. */
+ struct cryptocop_dma_desc *pad_descs;
+
+ struct cryptocop_tfrm_ctx *prev_src;
+ struct cryptocop_tfrm_ctx *curr_src;
+
+ /* Mapping to HW. */
+ unsigned char unit_no;
+};
+
+
+struct cryptocop_private{
+ cryptocop_session_id sid;
+ struct cryptocop_private *next;
+};
+
+/* Session list. */
+
+struct cryptocop_transform_ctx{
+ struct cryptocop_transform_init init;
+ unsigned char dec_key[CRYPTOCOP_MAX_KEY_LENGTH];
+ unsigned int dec_key_set:1;
+
+ struct cryptocop_transform_ctx *next;
+};
+
+
+struct cryptocop_session{
+ cryptocop_session_id sid;
+
+ struct cryptocop_transform_ctx *tfrm_ctx;
+
+ struct cryptocop_session *next;
+};
+
+/* Priority levels for jobs sent to the cryptocop. Checksum operations from
+ kernel have highest priority since TCPIP stack processing must not
+ be a bottleneck. */
+typedef enum {
+ cryptocop_prio_kernel_csum = 0,
+ cryptocop_prio_kernel = 1,
+ cryptocop_prio_user = 2,
+ cryptocop_prio_no_prios = 3
+} cryptocop_queue_priority;
+
+struct cryptocop_prio_queue{
+ struct list_head jobs;
+ cryptocop_queue_priority prio;
+};
+
+struct cryptocop_prio_job{
+ struct list_head node;
+ cryptocop_queue_priority prio;
+
+ struct cryptocop_operation *oper;
+ struct cryptocop_int_operation *iop;
+};
+
+struct ioctl_job_cb_ctx {
+ unsigned int processed:1;
+};
+
+
+static struct cryptocop_session *cryptocop_sessions = NULL;
+spinlock_t cryptocop_sessions_lock;
+
+/* Next Session ID to assign. */
+static cryptocop_session_id next_sid = 1;
+
+/* Pad for checksum. */
+static const char csum_zero_pad[1] = {0x00};
+
+/* Trash buffer for mem2mem operations. */
+#define MEM2MEM_DISCARD_BUF_LENGTH (512)
+static unsigned char mem2mem_discard_buf[MEM2MEM_DISCARD_BUF_LENGTH];
+
+/* Descriptor pool. */
+/* FIXME Tweak this value. */
+#define CRYPTOCOP_DESCRIPTOR_POOL_SIZE (100)
+static struct cryptocop_dma_desc descr_pool[CRYPTOCOP_DESCRIPTOR_POOL_SIZE];
+static struct cryptocop_dma_desc *descr_pool_free_list;
+static int descr_pool_no_free;
+static spinlock_t descr_pool_lock;
+
+/* Lock to stop cryptocop to start processing of a new operation. The holder
+ of this lock MUST call cryptocop_start_job() after it is unlocked. */
+spinlock_t cryptocop_process_lock;
+
+static struct cryptocop_prio_queue cryptocop_job_queues[cryptocop_prio_no_prios];
+static spinlock_t cryptocop_job_queue_lock;
+static struct cryptocop_prio_job *cryptocop_running_job = NULL;
+static spinlock_t running_job_lock;
+
+/* The interrupt handler appends completed jobs to this list. The scehduled
+ * tasklet removes them upon sending the response to the crypto consumer. */
+static struct list_head cryptocop_completed_jobs;
+static spinlock_t cryptocop_completed_jobs_lock;
+
+DECLARE_WAIT_QUEUE_HEAD(cryptocop_ioc_process_wq);
+
+
+/** Local functions. **/
+
+static int cryptocop_open(struct inode *, struct file *);
+
+static int cryptocop_release(struct inode *, struct file *);
+
+static long cryptocop_ioctl(struct file *file,
+ unsigned int cmd, unsigned long arg);
+
+static void cryptocop_start_job(void);
+
+static int cryptocop_job_queue_insert(cryptocop_queue_priority prio, struct cryptocop_operation *operation);
+static int cryptocop_job_setup(struct cryptocop_prio_job **pj, struct cryptocop_operation *operation);
+
+static int cryptocop_job_queue_init(void);
+static void cryptocop_job_queue_close(void);
+
+static int create_md5_pad(int alloc_flag, unsigned long long hashed_length, char **pad, size_t *pad_length);
+
+static int create_sha1_pad(int alloc_flag, unsigned long long hashed_length, char **pad, size_t *pad_length);
+
+static int transform_ok(struct cryptocop_transform_init *tinit);
+
+static struct cryptocop_session *get_session(cryptocop_session_id sid);
+
+static struct cryptocop_transform_ctx *get_transform_ctx(struct cryptocop_session *sess, cryptocop_tfrm_id tid);
+
+static void delete_internal_operation(struct cryptocop_int_operation *iop);
+
+static void get_aes_decrypt_key(unsigned char *dec_key, const unsigned char *key, unsigned int keylength);
+
+static int init_stream_coprocessor(void);
+
+static void __exit exit_stream_coprocessor(void);
+
+/*#define LDEBUG*/
+#ifdef LDEBUG
+#define DEBUG(s) s
+#define DEBUG_API(s) s
+static void print_cryptocop_operation(struct cryptocop_operation *cop);
+static void print_dma_descriptors(struct cryptocop_int_operation *iop);
+static void print_strcop_crypto_op(struct strcop_crypto_op *cop);
+static void print_lock_status(void);
+static void print_user_dma_lists(struct cryptocop_dma_list_operation *dma_op);
+#define assert(s) do{if (!(s)) panic(#s);} while(0);
+#else
+#define DEBUG(s)
+#define DEBUG_API(s)
+#define assert(s)
+#endif
+
+
+/* Transform constants. */
+#define DES_BLOCK_LENGTH (8)
+#define AES_BLOCK_LENGTH (16)
+#define MD5_BLOCK_LENGTH (64)
+#define SHA1_BLOCK_LENGTH (64)
+#define CSUM_BLOCK_LENGTH (2)
+#define MD5_STATE_LENGTH (16)
+#define SHA1_STATE_LENGTH (20)
+
+/* The device number. */
+#define CRYPTOCOP_MAJOR (254)
+#define CRYPTOCOP_MINOR (0)
+
+
+
+const struct file_operations cryptocop_fops = {
+ .owner = THIS_MODULE,
+ .open = cryptocop_open,
+ .release = cryptocop_release,
+ .unlocked_ioctl = cryptocop_ioctl,
+ .llseek = noop_llseek,
+};
+
+
+static void free_cdesc(struct cryptocop_dma_desc *cdesc)
+{
+ DEBUG(printk("free_cdesc: cdesc 0x%p, from_pool=%d\n", cdesc, cdesc->from_pool));
+ kfree(cdesc->free_buf);
+
+ if (cdesc->from_pool) {
+ unsigned long int flags;
+ spin_lock_irqsave(&descr_pool_lock, flags);
+ cdesc->next = descr_pool_free_list;
+ descr_pool_free_list = cdesc;
+ ++descr_pool_no_free;
+ spin_unlock_irqrestore(&descr_pool_lock, flags);
+ } else {
+ kfree(cdesc);
+ }
+}
+
+
+static struct cryptocop_dma_desc *alloc_cdesc(int alloc_flag)
+{
+ int use_pool = (alloc_flag & GFP_ATOMIC) ? 1 : 0;
+ struct cryptocop_dma_desc *cdesc;
+
+ if (use_pool) {
+ unsigned long int flags;
+ spin_lock_irqsave(&descr_pool_lock, flags);
+ if (!descr_pool_free_list) {
+ spin_unlock_irqrestore(&descr_pool_lock, flags);
+ DEBUG_API(printk("alloc_cdesc: pool is empty\n"));
+ return NULL;
+ }
+ cdesc = descr_pool_free_list;
+ descr_pool_free_list = descr_pool_free_list->next;
+ --descr_pool_no_free;
+ spin_unlock_irqrestore(&descr_pool_lock, flags);
+ cdesc->from_pool = 1;
+ } else {
+ cdesc = kmalloc(sizeof(struct cryptocop_dma_desc), alloc_flag);
+ if (!cdesc) {
+ DEBUG_API(printk("alloc_cdesc: kmalloc\n"));
+ return NULL;
+ }
+ cdesc->from_pool = 0;
+ }
+ cdesc->dma_descr = (dma_descr_data*)(((unsigned long int)cdesc + offsetof(struct cryptocop_dma_desc, dma_descr_buf) + DESCR_ALLOC_PAD) & ~0x0000001F);
+
+ cdesc->next = NULL;
+
+ cdesc->free_buf = NULL;
+ cdesc->dma_descr->out_eop = 0;
+ cdesc->dma_descr->in_eop = 0;
+ cdesc->dma_descr->intr = 0;
+ cdesc->dma_descr->eol = 0;
+ cdesc->dma_descr->wait = 0;
+ cdesc->dma_descr->buf = NULL;
+ cdesc->dma_descr->after = NULL;
+
+ DEBUG_API(printk("alloc_cdesc: return 0x%p, cdesc->dma_descr=0x%p, from_pool=%d\n", cdesc, cdesc->dma_descr, cdesc->from_pool));
+ return cdesc;
+}
+
+
+static void setup_descr_chain(struct cryptocop_dma_desc *cd)
+{
+ DEBUG(printk("setup_descr_chain: entering\n"));
+ while (cd) {
+ if (cd->next) {
+ cd->dma_descr->next = (dma_descr_data*)virt_to_phys(cd->next->dma_descr);
+ } else {
+ cd->dma_descr->next = NULL;
+ }
+ cd = cd->next;
+ }
+ DEBUG(printk("setup_descr_chain: exit\n"));
+}
+
+
+/* Create a pad descriptor for the transform.
+ * Return -1 for error, 0 if pad created. */
+static int create_pad_descriptor(struct cryptocop_tfrm_ctx *tc, struct cryptocop_dma_desc **pad_desc, int alloc_flag)
+{
+ struct cryptocop_dma_desc *cdesc = NULL;
+ int error = 0;
+ struct strcop_meta_out mo = {
+ .ciphsel = src_none,
+ .hashsel = src_none,
+ .csumsel = src_none
+ };
+ char *pad;
+ size_t plen;
+
+ DEBUG(printk("create_pad_descriptor: start.\n"));
+ /* Setup pad descriptor. */
+
+ DEBUG(printk("create_pad_descriptor: setting up padding.\n"));
+ cdesc = alloc_cdesc(alloc_flag);
+ if (!cdesc){
+ DEBUG_API(printk("create_pad_descriptor: alloc pad desc\n"));
+ goto error_cleanup;
+ }
+ switch (tc->unit_no) {
+ case src_md5:
+ error = create_md5_pad(alloc_flag, tc->consumed, &pad, &plen);
+ if (error){
+ DEBUG_API(printk("create_pad_descriptor: create_md5_pad_failed\n"));
+ goto error_cleanup;
+ }
+ cdesc->free_buf = pad;
+ mo.hashsel = src_dma;
+ mo.hashconf = tc->hash_conf;
+ mo.hashmode = tc->hash_mode;
+ break;
+ case src_sha1:
+ error = create_sha1_pad(alloc_flag, tc->consumed, &pad, &plen);
+ if (error){
+ DEBUG_API(printk("create_pad_descriptor: create_sha1_pad_failed\n"));
+ goto error_cleanup;
+ }
+ cdesc->free_buf = pad;
+ mo.hashsel = src_dma;
+ mo.hashconf = tc->hash_conf;
+ mo.hashmode = tc->hash_mode;
+ break;
+ case src_csum:
+ if (tc->consumed % tc->blocklength){
+ pad = (char*)csum_zero_pad;
+ plen = 1;
+ } else {
+ pad = (char*)cdesc; /* Use any pointer. */
+ plen = 0;
+ }
+ mo.csumsel = src_dma;
+ break;
+ }
+ cdesc->dma_descr->wait = 1;
+ cdesc->dma_descr->out_eop = 1; /* Since this is a pad output is pushed. EOP is ok here since the padded unit is the only one active. */
+ cdesc->dma_descr->buf = (char*)virt_to_phys((char*)pad);
+ cdesc->dma_descr->after = cdesc->dma_descr->buf + plen;
+
+ cdesc->dma_descr->md = REG_TYPE_CONV(unsigned short int, struct strcop_meta_out, mo);
+ *pad_desc = cdesc;
+
+ return 0;
+
+ error_cleanup:
+ if (cdesc) free_cdesc(cdesc);
+ return -1;
+}
+
+
+static int setup_key_dl_desc(struct cryptocop_tfrm_ctx *tc, struct cryptocop_dma_desc **kd, int alloc_flag)
+{
+ struct cryptocop_dma_desc *key_desc = alloc_cdesc(alloc_flag);
+ struct strcop_meta_out mo = {0};
+
+ DEBUG(printk("setup_key_dl_desc\n"));
+
+ if (!key_desc) {
+ DEBUG_API(printk("setup_key_dl_desc: failed descriptor allocation.\n"));
+ return -ENOMEM;
+ }
+
+ /* Download key. */
+ if ((tc->tctx->init.alg == cryptocop_alg_aes) && (tc->tcfg->flags & CRYPTOCOP_DECRYPT)) {
+ /* Precook the AES decrypt key. */
+ if (!tc->tctx->dec_key_set){
+ get_aes_decrypt_key(tc->tctx->dec_key, tc->tctx->init.key, tc->tctx->init.keylen);
+ tc->tctx->dec_key_set = 1;
+ }
+ key_desc->dma_descr->buf = (char*)virt_to_phys(tc->tctx->dec_key);
+ key_desc->dma_descr->after = key_desc->dma_descr->buf + tc->tctx->init.keylen/8;
+ } else {
+ key_desc->dma_descr->buf = (char*)virt_to_phys(tc->tctx->init.key);
+ key_desc->dma_descr->after = key_desc->dma_descr->buf + tc->tctx->init.keylen/8;
+ }
+ /* Setup metadata. */
+ mo.dlkey = 1;
+ switch (tc->tctx->init.keylen) {
+ case 64:
+ mo.decrypt = 0;
+ mo.hashmode = 0;
+ break;
+ case 128:
+ mo.decrypt = 0;
+ mo.hashmode = 1;
+ break;
+ case 192:
+ mo.decrypt = 1;
+ mo.hashmode = 0;
+ break;
+ case 256:
+ mo.decrypt = 1;
+ mo.hashmode = 1;
+ break;
+ default:
+ break;
+ }
+ mo.ciphsel = mo.hashsel = mo.csumsel = src_none;
+ key_desc->dma_descr->md = REG_TYPE_CONV(unsigned short int, struct strcop_meta_out, mo);
+
+ key_desc->dma_descr->out_eop = 1;
+ key_desc->dma_descr->wait = 1;
+ key_desc->dma_descr->intr = 0;
+
+ *kd = key_desc;
+ return 0;
+}
+
+static int setup_cipher_iv_desc(struct cryptocop_tfrm_ctx *tc, struct cryptocop_dma_desc **id, int alloc_flag)
+{
+ struct cryptocop_dma_desc *iv_desc = alloc_cdesc(alloc_flag);
+ struct strcop_meta_out mo = {0};
+
+ DEBUG(printk("setup_cipher_iv_desc\n"));
+
+ if (!iv_desc) {
+ DEBUG_API(printk("setup_cipher_iv_desc: failed CBC IV descriptor allocation.\n"));
+ return -ENOMEM;
+ }
+ /* Download IV. */
+ iv_desc->dma_descr->buf = (char*)virt_to_phys(tc->tcfg->iv);
+ iv_desc->dma_descr->after = iv_desc->dma_descr->buf + tc->blocklength;
+
+ /* Setup metadata. */
+ mo.hashsel = mo.csumsel = src_none;
+ mo.ciphsel = src_dma;
+ mo.ciphconf = tc->ciph_conf;
+ mo.cbcmode = tc->cbcmode;
+
+ iv_desc->dma_descr->md = REG_TYPE_CONV(unsigned short int, struct strcop_meta_out, mo);
+
+ iv_desc->dma_descr->out_eop = 0;
+ iv_desc->dma_descr->wait = 1;
+ iv_desc->dma_descr->intr = 0;
+
+ *id = iv_desc;
+ return 0;
+}
+
+/* Map the ouput length of the transform to operation output starting on the inject index. */
+static int create_input_descriptors(struct cryptocop_operation *operation, struct cryptocop_tfrm_ctx *tc, struct cryptocop_dma_desc **id, int alloc_flag)
+{
+ int err = 0;
+ struct cryptocop_dma_desc head = {0};
+ struct cryptocop_dma_desc *outdesc = &head;
+ size_t iov_offset = 0;
+ size_t out_ix = 0;
+ int outiov_ix = 0;
+ struct strcop_meta_in mi = {0};
+
+ size_t out_length = tc->produced;
+ int rem_length;
+ int dlength;
+
+ assert(out_length != 0);
+ if (((tc->produced + tc->tcfg->inject_ix) > operation->tfrm_op.outlen) || (tc->produced && (operation->tfrm_op.outlen == 0))) {
+ DEBUG_API(printk("create_input_descriptors: operation outdata too small\n"));
+ return -EINVAL;
+ }
+ /* Traverse the out iovec until the result inject index is reached. */
+ while ((outiov_ix < operation->tfrm_op.outcount) && ((out_ix + operation->tfrm_op.outdata[outiov_ix].iov_len) <= tc->tcfg->inject_ix)){
+ out_ix += operation->tfrm_op.outdata[outiov_ix].iov_len;
+ outiov_ix++;
+ }
+ if (outiov_ix >= operation->tfrm_op.outcount){
+ DEBUG_API(printk("create_input_descriptors: operation outdata too small\n"));
+ return -EINVAL;
+ }
+ iov_offset = tc->tcfg->inject_ix - out_ix;
+ mi.dmasel = tc->unit_no;
+
+ /* Setup the output descriptors. */
+ while ((out_length > 0) && (outiov_ix < operation->tfrm_op.outcount)) {
+ outdesc->next = alloc_cdesc(alloc_flag);
+ if (!outdesc->next) {
+ DEBUG_API(printk("create_input_descriptors: alloc_cdesc\n"));
+ err = -ENOMEM;
+ goto error_cleanup;
+ }
+ outdesc = outdesc->next;
+ rem_length = operation->tfrm_op.outdata[outiov_ix].iov_len - iov_offset;
+ dlength = (out_length < rem_length) ? out_length : rem_length;
+
+ DEBUG(printk("create_input_descriptors:\n"
+ "outiov_ix=%d, rem_length=%d, dlength=%d\n"
+ "iov_offset=%d, outdata[outiov_ix].iov_len=%d\n"
+ "outcount=%d, outiov_ix=%d\n",
+ outiov_ix, rem_length, dlength, iov_offset, operation->tfrm_op.outdata[outiov_ix].iov_len, operation->tfrm_op.outcount, outiov_ix));
+
+ outdesc->dma_descr->buf = (char*)virt_to_phys(operation->tfrm_op.outdata[outiov_ix].iov_base + iov_offset);
+ outdesc->dma_descr->after = outdesc->dma_descr->buf + dlength;
+ outdesc->dma_descr->md = REG_TYPE_CONV(unsigned short int, struct strcop_meta_in, mi);
+
+ out_length -= dlength;
+ iov_offset += dlength;
+ if (iov_offset >= operation->tfrm_op.outdata[outiov_ix].iov_len) {
+ iov_offset = 0;
+ ++outiov_ix;
+ }
+ }
+ if (out_length > 0){
+ DEBUG_API(printk("create_input_descriptors: not enough room for output, %d remained\n", out_length));
+ err = -EINVAL;
+ goto error_cleanup;
+ }
+ /* Set sync in last descriptor. */
+ mi.sync = 1;
+ outdesc->dma_descr->md = REG_TYPE_CONV(unsigned short int, struct strcop_meta_in, mi);
+
+ *id = head.next;
+ return 0;
+
+ error_cleanup:
+ while (head.next) {
+ outdesc = head.next->next;
+ free_cdesc(head.next);
+ head.next = outdesc;
+ }
+ return err;
+}
+
+
+static int create_output_descriptors(struct cryptocop_operation *operation, int *iniov_ix, int *iniov_offset, size_t desc_len, struct cryptocop_dma_desc **current_out_cdesc, struct strcop_meta_out *meta_out, int alloc_flag)
+{
+ while (desc_len != 0) {
+ struct cryptocop_dma_desc *cdesc;
+ int rem_length = operation->tfrm_op.indata[*iniov_ix].iov_len - *iniov_offset;
+ int dlength = (desc_len < rem_length) ? desc_len : rem_length;
+
+ cdesc = alloc_cdesc(alloc_flag);
+ if (!cdesc) {
+ DEBUG_API(printk("create_output_descriptors: alloc_cdesc\n"));
+ return -ENOMEM;
+ }
+ (*current_out_cdesc)->next = cdesc;
+ (*current_out_cdesc) = cdesc;
+
+ cdesc->free_buf = NULL;
+
+ cdesc->dma_descr->buf = (char*)virt_to_phys(operation->tfrm_op.indata[*iniov_ix].iov_base + *iniov_offset);
+ cdesc->dma_descr->after = cdesc->dma_descr->buf + dlength;
+
+ assert(desc_len >= dlength);
+ desc_len -= dlength;
+ *iniov_offset += dlength;
+ if (*iniov_offset >= operation->tfrm_op.indata[*iniov_ix].iov_len) {
+ *iniov_offset = 0;
+ ++(*iniov_ix);
+ if (*iniov_ix > operation->tfrm_op.incount) {
+ DEBUG_API(printk("create_output_descriptors: not enough indata in operation."));
+ return -EINVAL;
+ }
+ }
+ cdesc->dma_descr->md = REG_TYPE_CONV(unsigned short int, struct strcop_meta_out, (*meta_out));
+ } /* while (desc_len != 0) */
+ /* Last DMA descriptor gets a 'wait' bit to signal expected change in metadata. */
+ (*current_out_cdesc)->dma_descr->wait = 1; /* This will set extraneous WAIT in some situations, e.g. when padding hashes and checksums. */
+
+ return 0;
+}
+
+
+static int append_input_descriptors(struct cryptocop_operation *operation, struct cryptocop_dma_desc **current_in_cdesc, struct cryptocop_dma_desc **current_out_cdesc, struct cryptocop_tfrm_ctx *tc, int alloc_flag)
+{
+ DEBUG(printk("append_input_descriptors, tc=0x%p, unit_no=%d\n", tc, tc->unit_no));
+ if (tc->tcfg) {
+ int failed = 0;
+ struct cryptocop_dma_desc *idescs = NULL;
+ DEBUG(printk("append_input_descriptors: pushing output, consumed %d produced %d bytes.\n", tc->consumed, tc->produced));
+ if (tc->pad_descs) {
+ DEBUG(printk("append_input_descriptors: append pad descriptors to DMA out list.\n"));
+ while (tc->pad_descs) {
+ DEBUG(printk("append descriptor 0x%p\n", tc->pad_descs));
+ (*current_out_cdesc)->next = tc->pad_descs;
+ tc->pad_descs = tc->pad_descs->next;
+ (*current_out_cdesc) = (*current_out_cdesc)->next;
+ }
+ }
+
+ /* Setup and append output descriptors to DMA in list. */
+ if (tc->unit_no == src_dma){
+ /* mem2mem. Setup DMA in descriptors to discard all input prior to the requested mem2mem data. */
+ struct strcop_meta_in mi = {.sync = 0, .dmasel = src_dma};
+ unsigned int start_ix = tc->start_ix;
+ while (start_ix){
+ unsigned int desclen = start_ix < MEM2MEM_DISCARD_BUF_LENGTH ? start_ix : MEM2MEM_DISCARD_BUF_LENGTH;
+ (*current_in_cdesc)->next = alloc_cdesc(alloc_flag);
+ if (!(*current_in_cdesc)->next){
+ DEBUG_API(printk("append_input_descriptors: alloc_cdesc mem2mem discard failed\n"));
+ return -ENOMEM;
+ }
+ (*current_in_cdesc) = (*current_in_cdesc)->next;
+ (*current_in_cdesc)->dma_descr->buf = (char*)virt_to_phys(mem2mem_discard_buf);
+ (*current_in_cdesc)->dma_descr->after = (*current_in_cdesc)->dma_descr->buf + desclen;
+ (*current_in_cdesc)->dma_descr->md = REG_TYPE_CONV(unsigned short int, struct strcop_meta_in, mi);
+ start_ix -= desclen;
+ }
+ mi.sync = 1;
+ (*current_in_cdesc)->dma_descr->md = REG_TYPE_CONV(unsigned short int, struct strcop_meta_in, mi);
+ }
+
+ failed = create_input_descriptors(operation, tc, &idescs, alloc_flag);
+ if (failed){
+ DEBUG_API(printk("append_input_descriptors: output descriptor setup failed\n"));
+ return failed;
+ }
+ DEBUG(printk("append_input_descriptors: append output descriptors to DMA in list.\n"));
+ while (idescs) {
+ DEBUG(printk("append descriptor 0x%p\n", idescs));
+ (*current_in_cdesc)->next = idescs;
+ idescs = idescs->next;
+ (*current_in_cdesc) = (*current_in_cdesc)->next;
+ }
+ }
+ return 0;
+}
+
+
+
+static int cryptocop_setup_dma_list(struct cryptocop_operation *operation, struct cryptocop_int_operation **int_op, int alloc_flag)
+{
+ struct cryptocop_session *sess;
+ struct cryptocop_transform_ctx *tctx;
+
+ struct cryptocop_tfrm_ctx digest_ctx = {
+ .previous_src = src_none,
+ .current_src = src_none,
+ .start_ix = 0,
+ .requires_padding = 1,
+ .strict_block_length = 0,
+ .hash_conf = 0,
+ .hash_mode = 0,
+ .ciph_conf = 0,
+ .cbcmode = 0,
+ .decrypt = 0,
+ .consumed = 0,
+ .produced = 0,
+ .pad_descs = NULL,
+ .active = 0,
+ .done = 0,
+ .prev_src = NULL,
+ .curr_src = NULL,
+ .tcfg = NULL};
+ struct cryptocop_tfrm_ctx cipher_ctx = {
+ .previous_src = src_none,
+ .current_src = src_none,
+ .start_ix = 0,
+ .requires_padding = 0,
+ .strict_block_length = 1,
+ .hash_conf = 0,
+ .hash_mode = 0,
+ .ciph_conf = 0,
+ .cbcmode = 0,
+ .decrypt = 0,
+ .consumed = 0,
+ .produced = 0,
+ .pad_descs = NULL,
+ .active = 0,
+ .done = 0,
+ .prev_src = NULL,
+ .curr_src = NULL,
+ .tcfg = NULL};
+ struct cryptocop_tfrm_ctx csum_ctx = {
+ .previous_src = src_none,
+ .current_src = src_none,
+ .start_ix = 0,
+ .blocklength = 2,
+ .requires_padding = 1,
+ .strict_block_length = 0,
+ .hash_conf = 0,
+ .hash_mode = 0,
+ .ciph_conf = 0,
+ .cbcmode = 0,
+ .decrypt = 0,
+ .consumed = 0,
+ .produced = 0,
+ .pad_descs = NULL,
+ .active = 0,
+ .done = 0,
+ .tcfg = NULL,
+ .prev_src = NULL,
+ .curr_src = NULL,
+ .unit_no = src_csum};
+ struct cryptocop_tfrm_cfg *tcfg = operation->tfrm_op.tfrm_cfg;
+
+ unsigned int indata_ix = 0;
+
+ /* iovec accounting. */
+ int iniov_ix = 0;
+ int iniov_offset = 0;
+
+ /* Operation descriptor cfg traversal pointer. */
+ struct cryptocop_desc *odsc;
+
+ int failed = 0;
+ /* List heads for allocated descriptors. */
+ struct cryptocop_dma_desc out_cdesc_head = {0};
+ struct cryptocop_dma_desc in_cdesc_head = {0};
+
+ struct cryptocop_dma_desc *current_out_cdesc = &out_cdesc_head;
+ struct cryptocop_dma_desc *current_in_cdesc = &in_cdesc_head;
+
+ struct cryptocop_tfrm_ctx *output_tc = NULL;
+ void *iop_alloc_ptr;
+
+ assert(operation != NULL);
+ assert(int_op != NULL);
+
+ DEBUG(printk("cryptocop_setup_dma_list: start\n"));
+ DEBUG(print_cryptocop_operation(operation));
+
+ sess = get_session(operation->sid);
+ if (!sess) {
+ DEBUG_API(printk("cryptocop_setup_dma_list: no session found for operation.\n"));
+ failed = -EINVAL;
+ goto error_cleanup;
+ }
+ iop_alloc_ptr = kmalloc(DESCR_ALLOC_PAD + sizeof(struct cryptocop_int_operation), alloc_flag);
+ if (!iop_alloc_ptr) {
+ DEBUG_API(printk("cryptocop_setup_dma_list: kmalloc cryptocop_int_operation\n"));
+ failed = -ENOMEM;
+ goto error_cleanup;
+ }
+ (*int_op) = (struct cryptocop_int_operation*)(((unsigned long int)(iop_alloc_ptr + DESCR_ALLOC_PAD + offsetof(struct cryptocop_int_operation, ctx_out)) & ~0x0000001F) - offsetof(struct cryptocop_int_operation, ctx_out));
+ DEBUG(memset((*int_op), 0xff, sizeof(struct cryptocop_int_operation)));
+ (*int_op)->alloc_ptr = iop_alloc_ptr;
+ DEBUG(printk("cryptocop_setup_dma_list: *int_op=0x%p, alloc_ptr=0x%p\n", *int_op, (*int_op)->alloc_ptr));
+
+ (*int_op)->sid = operation->sid;
+ (*int_op)->cdesc_out = NULL;
+ (*int_op)->cdesc_in = NULL;
+ (*int_op)->tdes_mode = cryptocop_3des_ede;
+ (*int_op)->csum_mode = cryptocop_csum_le;
+ (*int_op)->ddesc_out = NULL;
+ (*int_op)->ddesc_in = NULL;
+
+ /* Scan operation->tfrm_op.tfrm_cfg for bad configuration and set up the local contexts. */
+ if (!tcfg) {
+ DEBUG_API(printk("cryptocop_setup_dma_list: no configured transforms in operation.\n"));
+ failed = -EINVAL;
+ goto error_cleanup;
+ }
+ while (tcfg) {
+ tctx = get_transform_ctx(sess, tcfg->tid);
+ if (!tctx) {
+ DEBUG_API(printk("cryptocop_setup_dma_list: no transform id %d in session.\n", tcfg->tid));
+ failed = -EINVAL;
+ goto error_cleanup;
+ }
+ if (tcfg->inject_ix > operation->tfrm_op.outlen){
+ DEBUG_API(printk("cryptocop_setup_dma_list: transform id %d inject_ix (%d) > operation->tfrm_op.outlen(%d)", tcfg->tid, tcfg->inject_ix, operation->tfrm_op.outlen));
+ failed = -EINVAL;
+ goto error_cleanup;
+ }
+ switch (tctx->init.alg){
+ case cryptocop_alg_mem2mem:
+ if (cipher_ctx.tcfg != NULL){
+ DEBUG_API(printk("cryptocop_setup_dma_list: multiple ciphers in operation.\n"));
+ failed = -EINVAL;
+ goto error_cleanup;
+ }
+ /* mem2mem is handled as a NULL cipher. */
+ cipher_ctx.cbcmode = 0;
+ cipher_ctx.decrypt = 0;
+ cipher_ctx.blocklength = 1;
+ cipher_ctx.ciph_conf = 0;
+ cipher_ctx.unit_no = src_dma;
+ cipher_ctx.tcfg = tcfg;
+ cipher_ctx.tctx = tctx;
+ break;
+ case cryptocop_alg_des:
+ case cryptocop_alg_3des:
+ case cryptocop_alg_aes:
+ /* cipher */
+ if (cipher_ctx.tcfg != NULL){
+ DEBUG_API(printk("cryptocop_setup_dma_list: multiple ciphers in operation.\n"));
+ failed = -EINVAL;
+ goto error_cleanup;
+ }
+ cipher_ctx.tcfg = tcfg;
+ cipher_ctx.tctx = tctx;
+ if (cipher_ctx.tcfg->flags & CRYPTOCOP_DECRYPT){
+ cipher_ctx.decrypt = 1;
+ }
+ switch (tctx->init.cipher_mode) {
+ case cryptocop_cipher_mode_ecb:
+ cipher_ctx.cbcmode = 0;
+ break;
+ case cryptocop_cipher_mode_cbc:
+ cipher_ctx.cbcmode = 1;
+ break;
+ default:
+ DEBUG_API(printk("cryptocop_setup_dma_list: cipher_ctx, bad cipher mode==%d\n", tctx->init.cipher_mode));
+ failed = -EINVAL;
+ goto error_cleanup;
+ }
+ DEBUG(printk("cryptocop_setup_dma_list: cipher_ctx, set CBC mode==%d\n", cipher_ctx.cbcmode));
+ switch (tctx->init.alg){
+ case cryptocop_alg_des:
+ cipher_ctx.ciph_conf = 0;
+ cipher_ctx.unit_no = src_des;
+ cipher_ctx.blocklength = DES_BLOCK_LENGTH;
+ break;
+ case cryptocop_alg_3des:
+ cipher_ctx.ciph_conf = 1;
+ cipher_ctx.unit_no = src_des;
+ cipher_ctx.blocklength = DES_BLOCK_LENGTH;
+ break;
+ case cryptocop_alg_aes:
+ cipher_ctx.ciph_conf = 2;
+ cipher_ctx.unit_no = src_aes;
+ cipher_ctx.blocklength = AES_BLOCK_LENGTH;
+ break;
+ default:
+ panic("cryptocop_setup_dma_list: impossible algorithm %d\n", tctx->init.alg);
+ }
+ (*int_op)->tdes_mode = tctx->init.tdes_mode;
+ break;
+ case cryptocop_alg_md5:
+ case cryptocop_alg_sha1:
+ /* digest */
+ if (digest_ctx.tcfg != NULL){
+ DEBUG_API(printk("cryptocop_setup_dma_list: multiple digests in operation.\n"));
+ failed = -EINVAL;
+ goto error_cleanup;
+ }
+ digest_ctx.tcfg = tcfg;
+ digest_ctx.tctx = tctx;
+ digest_ctx.hash_mode = 0; /* Don't use explicit IV in this API. */
+ switch (tctx->init.alg){
+ case cryptocop_alg_md5:
+ digest_ctx.blocklength = MD5_BLOCK_LENGTH;
+ digest_ctx.unit_no = src_md5;
+ digest_ctx.hash_conf = 1; /* 1 => MD-5 */
+ break;
+ case cryptocop_alg_sha1:
+ digest_ctx.blocklength = SHA1_BLOCK_LENGTH;
+ digest_ctx.unit_no = src_sha1;
+ digest_ctx.hash_conf = 0; /* 0 => SHA-1 */
+ break;
+ default:
+ panic("cryptocop_setup_dma_list: impossible digest algorithm\n");
+ }
+ break;
+ case cryptocop_alg_csum:
+ /* digest */
+ if (csum_ctx.tcfg != NULL){
+ DEBUG_API(printk("cryptocop_setup_dma_list: multiple checksums in operation.\n"));
+ failed = -EINVAL;
+ goto error_cleanup;
+ }
+ (*int_op)->csum_mode = tctx->init.csum_mode;
+ csum_ctx.tcfg = tcfg;
+ csum_ctx.tctx = tctx;
+ break;
+ default:
+ /* no algorithm. */
+ DEBUG_API(printk("cryptocop_setup_dma_list: invalid algorithm %d specified in tfrm %d.\n", tctx->init.alg, tcfg->tid));
+ failed = -EINVAL;
+ goto error_cleanup;
+ }
+ tcfg = tcfg->next;
+ }
+ /* Download key if a cipher is used. */
+ if (cipher_ctx.tcfg && (cipher_ctx.tctx->init.alg != cryptocop_alg_mem2mem)){
+ struct cryptocop_dma_desc *key_desc = NULL;
+
+ failed = setup_key_dl_desc(&cipher_ctx, &key_desc, alloc_flag);
+ if (failed) {
+ DEBUG_API(printk("cryptocop_setup_dma_list: setup key dl\n"));
+ goto error_cleanup;
+ }
+ current_out_cdesc->next = key_desc;
+ current_out_cdesc = key_desc;
+ indata_ix += (unsigned int)(key_desc->dma_descr->after - key_desc->dma_descr->buf);
+
+ /* Download explicit IV if a cipher is used and CBC mode and explicit IV selected. */
+ if ((cipher_ctx.tctx->init.cipher_mode == cryptocop_cipher_mode_cbc) && (cipher_ctx.tcfg->flags & CRYPTOCOP_EXPLICIT_IV)) {
+ struct cryptocop_dma_desc *iv_desc = NULL;
+
+ DEBUG(printk("cryptocop_setup_dma_list: setup cipher CBC IV descriptor.\n"));
+
+ failed = setup_cipher_iv_desc(&cipher_ctx, &iv_desc, alloc_flag);
+ if (failed) {
+ DEBUG_API(printk("cryptocop_setup_dma_list: CBC IV descriptor.\n"));
+ goto error_cleanup;
+ }
+ current_out_cdesc->next = iv_desc;
+ current_out_cdesc = iv_desc;
+ indata_ix += (unsigned int)(iv_desc->dma_descr->after - iv_desc->dma_descr->buf);
+ }
+ }
+
+ /* Process descriptors. */
+ odsc = operation->tfrm_op.desc;
+ while (odsc) {
+ struct cryptocop_desc_cfg *dcfg = odsc->cfg;
+ struct strcop_meta_out meta_out = {0};
+ size_t desc_len = odsc->length;
+ int active_count, eop_needed_count;
+
+ output_tc = NULL;
+
+ DEBUG(printk("cryptocop_setup_dma_list: parsing an operation descriptor\n"));
+
+ while (dcfg) {
+ struct cryptocop_tfrm_ctx *tc = NULL;
+
+ DEBUG(printk("cryptocop_setup_dma_list: parsing an operation descriptor configuration.\n"));
+ /* Get the local context for the transform and mark it as the output unit if it produces output. */
+ if (digest_ctx.tcfg && (digest_ctx.tcfg->tid == dcfg->tid)){
+ tc = &digest_ctx;
+ } else if (cipher_ctx.tcfg && (cipher_ctx.tcfg->tid == dcfg->tid)){
+ tc = &cipher_ctx;
+ } else if (csum_ctx.tcfg && (csum_ctx.tcfg->tid == dcfg->tid)){
+ tc = &csum_ctx;
+ }
+ if (!tc) {
+ DEBUG_API(printk("cryptocop_setup_dma_list: invalid transform %d specified in descriptor.\n", dcfg->tid));
+ failed = -EINVAL;
+ goto error_cleanup;
+ }
+ if (tc->done) {
+ DEBUG_API(printk("cryptocop_setup_dma_list: completed transform %d reused.\n", dcfg->tid));
+ failed = -EINVAL;
+ goto error_cleanup;
+ }
+ if (!tc->active) {
+ tc->start_ix = indata_ix;
+ tc->active = 1;
+ }
+
+ tc->previous_src = tc->current_src;
+ tc->prev_src = tc->curr_src;
+ /* Map source unit id to DMA source config. */
+ switch (dcfg->src){
+ case cryptocop_source_dma:
+ tc->current_src = src_dma;
+ break;
+ case cryptocop_source_des:
+ tc->current_src = src_des;
+ break;
+ case cryptocop_source_3des:
+ tc->current_src = src_des;
+ break;
+ case cryptocop_source_aes:
+ tc->current_src = src_aes;
+ break;
+ case cryptocop_source_md5:
+ case cryptocop_source_sha1:
+ case cryptocop_source_csum:
+ case cryptocop_source_none:
+ default:
+ /* We do not allow using accumulating style units (SHA-1, MD5, checksum) as sources to other units.
+ */
+ DEBUG_API(printk("cryptocop_setup_dma_list: bad unit source configured %d.\n", dcfg->src));
+ failed = -EINVAL;
+ goto error_cleanup;
+ }
+ if (tc->current_src != src_dma) {
+ /* Find the unit we are sourcing from. */
+ if (digest_ctx.unit_no == tc->current_src){
+ tc->curr_src = &digest_ctx;
+ } else if (cipher_ctx.unit_no == tc->current_src){
+ tc->curr_src = &cipher_ctx;
+ } else if (csum_ctx.unit_no == tc->current_src){
+ tc->curr_src = &csum_ctx;
+ }
+ if ((tc->curr_src == tc) && (tc->unit_no != src_dma)){
+ DEBUG_API(printk("cryptocop_setup_dma_list: unit %d configured to source from itself.\n", tc->unit_no));
+ failed = -EINVAL;
+ goto error_cleanup;
+ }
+ } else {
+ tc->curr_src = NULL;
+ }
+
+ /* Detect source switch. */
+ DEBUG(printk("cryptocop_setup_dma_list: tc->active=%d tc->unit_no=%d tc->current_src=%d tc->previous_src=%d, tc->curr_src=0x%p, tc->prev_srv=0x%p\n", tc->active, tc->unit_no, tc->current_src, tc->previous_src, tc->curr_src, tc->prev_src));
+ if (tc->active && (tc->current_src != tc->previous_src)) {
+ /* Only allow source switch when both the old source unit and the new one have
+ * no pending data to process (i.e. the consumed length must be a multiple of the
+ * transform blocklength). */
+ /* Note: if the src == NULL we are actually sourcing from DMA out. */
+ if (((tc->prev_src != NULL) && (tc->prev_src->consumed % tc->prev_src->blocklength)) ||
+ ((tc->curr_src != NULL) && (tc->curr_src->consumed % tc->curr_src->blocklength)))
+ {
+ DEBUG_API(printk("cryptocop_setup_dma_list: can only disconnect from or connect to a unit on a multiple of the blocklength, old: cons=%d, prod=%d, block=%d, new: cons=%d prod=%d, block=%d.\n", tc->prev_src ? tc->prev_src->consumed : INT_MIN, tc->prev_src ? tc->prev_src->produced : INT_MIN, tc->prev_src ? tc->prev_src->blocklength : INT_MIN, tc->curr_src ? tc->curr_src->consumed : INT_MIN, tc->curr_src ? tc->curr_src->produced : INT_MIN, tc->curr_src ? tc->curr_src->blocklength : INT_MIN));
+ failed = -EINVAL;
+ goto error_cleanup;
+ }
+ }
+ /* Detect unit deactivation. */
+ if (dcfg->last) {
+ /* Length check of this is handled below. */
+ tc->done = 1;
+ }
+ dcfg = dcfg->next;
+ } /* while (dcfg) */
+ DEBUG(printk("cryptocop_setup_dma_list: parsing operation descriptor configuration complete.\n"));
+
+ if (cipher_ctx.active && (cipher_ctx.curr_src != NULL) && !cipher_ctx.curr_src->active){
+ DEBUG_API(printk("cryptocop_setup_dma_list: cipher source from inactive unit %d\n", cipher_ctx.curr_src->unit_no));
+ failed = -EINVAL;
+ goto error_cleanup;
+ }
+ if (digest_ctx.active && (digest_ctx.curr_src != NULL) && !digest_ctx.curr_src->active){
+ DEBUG_API(printk("cryptocop_setup_dma_list: digest source from inactive unit %d\n", digest_ctx.curr_src->unit_no));
+ failed = -EINVAL;
+ goto error_cleanup;
+ }
+ if (csum_ctx.active && (csum_ctx.curr_src != NULL) && !csum_ctx.curr_src->active){
+ DEBUG_API(printk("cryptocop_setup_dma_list: cipher source from inactive unit %d\n", csum_ctx.curr_src->unit_no));
+ failed = -EINVAL;
+ goto error_cleanup;
+ }
+
+ /* Update consumed and produced lengths.
+
+ The consumed length accounting here is actually cheating. If a unit source from DMA (or any
+ other unit that process data in blocks of one octet) it is correct, but if it source from a
+ block processing unit, i.e. a cipher, it will be temporarily incorrect at some times. However
+ since it is only allowed--by the HW--to change source to or from a block processing unit at times where that
+ unit has processed an exact multiple of its block length the end result will be correct.
+ Beware that if the source change restriction change this code will need to be (much) reworked.
+ */
+ DEBUG(printk("cryptocop_setup_dma_list: desc->length=%d, desc_len=%d.\n", odsc->length, desc_len));
+
+ if (csum_ctx.active) {
+ csum_ctx.consumed += desc_len;
+ if (csum_ctx.done) {
+ csum_ctx.produced = 2;
+ }
+ DEBUG(printk("cryptocop_setup_dma_list: csum_ctx producing: consumed=%d, produced=%d, blocklength=%d.\n", csum_ctx.consumed, csum_ctx.produced, csum_ctx.blocklength));
+ }
+ if (digest_ctx.active) {
+ digest_ctx.consumed += desc_len;
+ if (digest_ctx.done) {
+ if (digest_ctx.unit_no == src_md5) {
+ digest_ctx.produced = MD5_STATE_LENGTH;
+ } else {
+ digest_ctx.produced = SHA1_STATE_LENGTH;
+ }
+ }
+ DEBUG(printk("cryptocop_setup_dma_list: digest_ctx producing: consumed=%d, produced=%d, blocklength=%d.\n", digest_ctx.consumed, digest_ctx.produced, digest_ctx.blocklength));
+ }
+ if (cipher_ctx.active) {
+ /* Ciphers are allowed only to source from DMA out. That is filtered above. */
+ assert(cipher_ctx.current_src == src_dma);
+ cipher_ctx.consumed += desc_len;
+ cipher_ctx.produced = cipher_ctx.blocklength * (cipher_ctx.consumed / cipher_ctx.blocklength);
+ if (cipher_ctx.cbcmode && !(cipher_ctx.tcfg->flags & CRYPTOCOP_EXPLICIT_IV) && cipher_ctx.produced){
+ cipher_ctx.produced -= cipher_ctx.blocklength; /* Compensate for CBC iv. */
+ }
+ DEBUG(printk("cryptocop_setup_dma_list: cipher_ctx producing: consumed=%d, produced=%d, blocklength=%d.\n", cipher_ctx.consumed, cipher_ctx.produced, cipher_ctx.blocklength));
+ }
+
+ /* Setup the DMA out descriptors. */
+ /* Configure the metadata. */
+ active_count = 0;
+ eop_needed_count = 0;
+ if (cipher_ctx.active) {
+ ++active_count;
+ if (cipher_ctx.unit_no == src_dma){
+ /* mem2mem */
+ meta_out.ciphsel = src_none;
+ } else {
+ meta_out.ciphsel = cipher_ctx.current_src;
+ }
+ meta_out.ciphconf = cipher_ctx.ciph_conf;
+ meta_out.cbcmode = cipher_ctx.cbcmode;
+ meta_out.decrypt = cipher_ctx.decrypt;
+ DEBUG(printk("set ciphsel=%d ciphconf=%d cbcmode=%d decrypt=%d\n", meta_out.ciphsel, meta_out.ciphconf, meta_out.cbcmode, meta_out.decrypt));
+ if (cipher_ctx.done) ++eop_needed_count;
+ } else {
+ meta_out.ciphsel = src_none;
+ }
+
+ if (digest_ctx.active) {
+ ++active_count;
+ meta_out.hashsel = digest_ctx.current_src;
+ meta_out.hashconf = digest_ctx.hash_conf;
+ meta_out.hashmode = 0; /* Explicit mode is not used here. */
+ DEBUG(printk("set hashsel=%d hashconf=%d hashmode=%d\n", meta_out.hashsel, meta_out.hashconf, meta_out.hashmode));
+ if (digest_ctx.done) {
+ assert(digest_ctx.pad_descs == NULL);
+ failed = create_pad_descriptor(&digest_ctx, &digest_ctx.pad_descs, alloc_flag);
+ if (failed) {
+ DEBUG_API(printk("cryptocop_setup_dma_list: failed digest pad creation.\n"));
+ goto error_cleanup;
+ }
+ }
+ } else {
+ meta_out.hashsel = src_none;
+ }
+
+ if (csum_ctx.active) {
+ ++active_count;
+ meta_out.csumsel = csum_ctx.current_src;
+ if (csum_ctx.done) {
+ assert(csum_ctx.pad_descs == NULL);
+ failed = create_pad_descriptor(&csum_ctx, &csum_ctx.pad_descs, alloc_flag);
+ if (failed) {
+ DEBUG_API(printk("cryptocop_setup_dma_list: failed csum pad creation.\n"));
+ goto error_cleanup;
+ }
+ }
+ } else {
+ meta_out.csumsel = src_none;
+ }
+ DEBUG(printk("cryptocop_setup_dma_list: %d eop needed, %d active units\n", eop_needed_count, active_count));
+ /* Setup DMA out descriptors for the indata. */
+ failed = create_output_descriptors(operation, &iniov_ix, &iniov_offset, desc_len, &current_out_cdesc, &meta_out, alloc_flag);
+ if (failed) {
+ DEBUG_API(printk("cryptocop_setup_dma_list: create_output_descriptors %d\n", failed));
+ goto error_cleanup;
+ }
+ /* Setup out EOP. If there are active units that are not done here they cannot get an EOP
+ * so we ust setup a zero length descriptor to DMA to signal EOP only to done units.
+ * If there is a pad descriptor EOP for the padded unit will be EOPed by it.
+ */
+ assert(active_count >= eop_needed_count);
+ assert((eop_needed_count == 0) || (eop_needed_count == 1));
+ if (eop_needed_count) {
+ /* This means that the bulk operation (cipeher/m2m) is terminated. */
+ if (active_count > 1) {
+ /* Use zero length EOP descriptor. */
+ struct cryptocop_dma_desc *ed = alloc_cdesc(alloc_flag);
+ struct strcop_meta_out ed_mo = {0};
+ if (!ed) {
+ DEBUG_API(printk("cryptocop_setup_dma_list: alloc EOP descriptor for cipher\n"));
+ failed = -ENOMEM;
+ goto error_cleanup;
+ }
+
+ assert(cipher_ctx.active && cipher_ctx.done);
+
+ if (cipher_ctx.unit_no == src_dma){
+ /* mem2mem */
+ ed_mo.ciphsel = src_none;
+ } else {
+ ed_mo.ciphsel = cipher_ctx.current_src;
+ }
+ ed_mo.ciphconf = cipher_ctx.ciph_conf;
+ ed_mo.cbcmode = cipher_ctx.cbcmode;
+ ed_mo.decrypt = cipher_ctx.decrypt;
+
+ ed->free_buf = NULL;
+ ed->dma_descr->wait = 1;
+ ed->dma_descr->out_eop = 1;
+
+ ed->dma_descr->buf = (char*)virt_to_phys(&ed); /* Use any valid physical address for zero length descriptor. */
+ ed->dma_descr->after = ed->dma_descr->buf;
+ ed->dma_descr->md = REG_TYPE_CONV(unsigned short int, struct strcop_meta_out, ed_mo);
+ current_out_cdesc->next = ed;
+ current_out_cdesc = ed;
+ } else {
+ /* Set EOP in the current out descriptor since the only active module is
+ * the one needing the EOP. */
+
+ current_out_cdesc->dma_descr->out_eop = 1;
+ }
+ }
+
+ if (cipher_ctx.done && cipher_ctx.active) cipher_ctx.active = 0;
+ if (digest_ctx.done && digest_ctx.active) digest_ctx.active = 0;
+ if (csum_ctx.done && csum_ctx.active) csum_ctx.active = 0;
+ indata_ix += odsc->length;
+ odsc = odsc->next;
+ } /* while (odsc) */ /* Process descriptors. */
+ DEBUG(printk("cryptocop_setup_dma_list: done parsing operation descriptors\n"));
+ if (cipher_ctx.tcfg && (cipher_ctx.active || !cipher_ctx.done)){
+ DEBUG_API(printk("cryptocop_setup_dma_list: cipher operation not terminated.\n"));
+ failed = -EINVAL;
+ goto error_cleanup;
+ }
+ if (digest_ctx.tcfg && (digest_ctx.active || !digest_ctx.done)){
+ DEBUG_API(printk("cryptocop_setup_dma_list: digest operation not terminated.\n"));
+ failed = -EINVAL;
+ goto error_cleanup;
+ }
+ if (csum_ctx.tcfg && (csum_ctx.active || !csum_ctx.done)){
+ DEBUG_API(printk("cryptocop_setup_dma_list: csum operation not terminated.\n"));
+ failed = -EINVAL;
+ goto error_cleanup;
+ }
+
+ failed = append_input_descriptors(operation, &current_in_cdesc, &current_out_cdesc, &cipher_ctx, alloc_flag);
+ if (failed){
+ DEBUG_API(printk("cryptocop_setup_dma_list: append_input_descriptors cipher_ctx %d\n", failed));
+ goto error_cleanup;
+ }
+ failed = append_input_descriptors(operation, &current_in_cdesc, &current_out_cdesc, &digest_ctx, alloc_flag);
+ if (failed){
+ DEBUG_API(printk("cryptocop_setup_dma_list: append_input_descriptors cipher_ctx %d\n", failed));
+ goto error_cleanup;
+ }
+ failed = append_input_descriptors(operation, &current_in_cdesc, &current_out_cdesc, &csum_ctx, alloc_flag);
+ if (failed){
+ DEBUG_API(printk("cryptocop_setup_dma_list: append_input_descriptors cipher_ctx %d\n", failed));
+ goto error_cleanup;
+ }
+
+ DEBUG(printk("cryptocop_setup_dma_list: int_op=0x%p, *int_op=0x%p\n", int_op, *int_op));
+ (*int_op)->cdesc_out = out_cdesc_head.next;
+ (*int_op)->cdesc_in = in_cdesc_head.next;
+ DEBUG(printk("cryptocop_setup_dma_list: out_cdesc_head=0x%p in_cdesc_head=0x%p\n", (*int_op)->cdesc_out, (*int_op)->cdesc_in));
+
+ setup_descr_chain(out_cdesc_head.next);
+ setup_descr_chain(in_cdesc_head.next);
+
+ /* Last but not least: mark the last DMA in descriptor for a INTR and EOL and the the
+ * last DMA out descriptor for EOL.
+ */
+ current_in_cdesc->dma_descr->intr = 1;
+ current_in_cdesc->dma_descr->eol = 1;
+ current_out_cdesc->dma_descr->eol = 1;
+
+ /* Setup DMA contexts. */
+ (*int_op)->ctx_out.next = NULL;
+ (*int_op)->ctx_out.eol = 1;
+ (*int_op)->ctx_out.intr = 0;
+ (*int_op)->ctx_out.store_mode = 0;
+ (*int_op)->ctx_out.en = 0;
+ (*int_op)->ctx_out.dis = 0;
+ (*int_op)->ctx_out.md0 = 0;
+ (*int_op)->ctx_out.md1 = 0;
+ (*int_op)->ctx_out.md2 = 0;
+ (*int_op)->ctx_out.md3 = 0;
+ (*int_op)->ctx_out.md4 = 0;
+ (*int_op)->ctx_out.saved_data = (dma_descr_data*)virt_to_phys((*int_op)->cdesc_out->dma_descr);
+ (*int_op)->ctx_out.saved_data_buf = (*int_op)->cdesc_out->dma_descr->buf; /* Already physical address. */
+
+ (*int_op)->ctx_in.next = NULL;
+ (*int_op)->ctx_in.eol = 1;
+ (*int_op)->ctx_in.intr = 0;
+ (*int_op)->ctx_in.store_mode = 0;
+ (*int_op)->ctx_in.en = 0;
+ (*int_op)->ctx_in.dis = 0;
+ (*int_op)->ctx_in.md0 = 0;
+ (*int_op)->ctx_in.md1 = 0;
+ (*int_op)->ctx_in.md2 = 0;
+ (*int_op)->ctx_in.md3 = 0;
+ (*int_op)->ctx_in.md4 = 0;
+
+ (*int_op)->ctx_in.saved_data = (dma_descr_data*)virt_to_phys((*int_op)->cdesc_in->dma_descr);
+ (*int_op)->ctx_in.saved_data_buf = (*int_op)->cdesc_in->dma_descr->buf; /* Already physical address. */
+
+ DEBUG(printk("cryptocop_setup_dma_list: done\n"));
+ return 0;
+
+error_cleanup:
+ {
+ /* Free all allocated resources. */
+ struct cryptocop_dma_desc *tmp_cdesc;
+ while (digest_ctx.pad_descs){
+ tmp_cdesc = digest_ctx.pad_descs->next;
+ free_cdesc(digest_ctx.pad_descs);
+ digest_ctx.pad_descs = tmp_cdesc;
+ }
+ while (csum_ctx.pad_descs){
+ tmp_cdesc = csum_ctx.pad_descs->next;
+ free_cdesc(csum_ctx.pad_descs);
+ csum_ctx.pad_descs = tmp_cdesc;
+ }
+ assert(cipher_ctx.pad_descs == NULL); /* The ciphers are never padded. */
+
+ if (*int_op != NULL) delete_internal_operation(*int_op);
+ }
+ DEBUG_API(printk("cryptocop_setup_dma_list: done with error %d\n", failed));
+ return failed;
+}
+
+
+static void delete_internal_operation(struct cryptocop_int_operation *iop)
+{
+ void *ptr = iop->alloc_ptr;
+ struct cryptocop_dma_desc *cd = iop->cdesc_out;
+ struct cryptocop_dma_desc *next;
+
+ DEBUG(printk("delete_internal_operation: iop=0x%p, alloc_ptr=0x%p\n", iop, ptr));
+
+ while (cd) {
+ next = cd->next;
+ free_cdesc(cd);
+ cd = next;
+ }
+ cd = iop->cdesc_in;
+ while (cd) {
+ next = cd->next;
+ free_cdesc(cd);
+ cd = next;
+ }
+ kfree(ptr);
+}
+
+#define MD5_MIN_PAD_LENGTH (9)
+#define MD5_PAD_LENGTH_FIELD_LENGTH (8)
+
+static int create_md5_pad(int alloc_flag, unsigned long long hashed_length, char **pad, size_t *pad_length)
+{
+ size_t padlen = MD5_BLOCK_LENGTH - (hashed_length % MD5_BLOCK_LENGTH);
+ unsigned char *p;
+ int i;
+ unsigned long long int bit_length = hashed_length << 3;
+
+ if (padlen < MD5_MIN_PAD_LENGTH) padlen += MD5_BLOCK_LENGTH;
+
+ p = kzalloc(padlen, alloc_flag);
+ if (!p) return -ENOMEM;
+
+ *p = 0x80;
+
+ DEBUG(printk("create_md5_pad: hashed_length=%lld bits == %lld bytes\n", bit_length, hashed_length));
+
+ i = padlen - MD5_PAD_LENGTH_FIELD_LENGTH;
+ while (bit_length != 0){
+ p[i++] = bit_length % 0x100;
+ bit_length >>= 8;
+ }
+
+ *pad = (char*)p;
+ *pad_length = padlen;
+
+ return 0;
+}
+
+#define SHA1_MIN_PAD_LENGTH (9)
+#define SHA1_PAD_LENGTH_FIELD_LENGTH (8)
+
+static int create_sha1_pad(int alloc_flag, unsigned long long hashed_length, char **pad, size_t *pad_length)
+{
+ size_t padlen = SHA1_BLOCK_LENGTH - (hashed_length % SHA1_BLOCK_LENGTH);
+ unsigned char *p;
+ int i;
+ unsigned long long int bit_length = hashed_length << 3;
+
+ if (padlen < SHA1_MIN_PAD_LENGTH) padlen += SHA1_BLOCK_LENGTH;
+
+ p = kzalloc(padlen, alloc_flag);
+ if (!p) return -ENOMEM;
+
+ *p = 0x80;
+
+ DEBUG(printk("create_sha1_pad: hashed_length=%lld bits == %lld bytes\n", bit_length, hashed_length));
+
+ i = padlen - 1;
+ while (bit_length != 0){
+ p[i--] = bit_length % 0x100;
+ bit_length >>= 8;
+ }
+
+ *pad = (char*)p;
+ *pad_length = padlen;
+
+ return 0;
+}
+
+
+static int transform_ok(struct cryptocop_transform_init *tinit)
+{
+ switch (tinit->alg){
+ case cryptocop_alg_csum:
+ switch (tinit->csum_mode){
+ case cryptocop_csum_le:
+ case cryptocop_csum_be:
+ break;
+ default:
+ DEBUG_API(printk("transform_ok: Bad mode set for csum transform\n"));
+ return -EINVAL;
+ }
+ case cryptocop_alg_mem2mem:
+ case cryptocop_alg_md5:
+ case cryptocop_alg_sha1:
+ if (tinit->keylen != 0) {
+ DEBUG_API(printk("transform_ok: non-zero keylength, %d, for a digest/csum algorithm\n", tinit->keylen));
+ return -EINVAL; /* This check is a bit strict. */
+ }
+ break;
+ case cryptocop_alg_des:
+ if (tinit->keylen != 64) {
+ DEBUG_API(printk("transform_ok: keylen %d invalid for DES\n", tinit->keylen));
+ return -EINVAL;
+ }
+ break;
+ case cryptocop_alg_3des:
+ if (tinit->keylen != 192) {
+ DEBUG_API(printk("transform_ok: keylen %d invalid for 3DES\n", tinit->keylen));
+ return -EINVAL;
+ }
+ break;
+ case cryptocop_alg_aes:
+ if (tinit->keylen != 128 && tinit->keylen != 192 && tinit->keylen != 256) {
+ DEBUG_API(printk("transform_ok: keylen %d invalid for AES\n", tinit->keylen));
+ return -EINVAL;
+ }
+ break;
+ case cryptocop_no_alg:
+ default:
+ DEBUG_API(printk("transform_ok: no such algorithm %d\n", tinit->alg));
+ return -EINVAL;
+ }
+
+ switch (tinit->alg){
+ case cryptocop_alg_des:
+ case cryptocop_alg_3des:
+ case cryptocop_alg_aes:
+ if (tinit->cipher_mode != cryptocop_cipher_mode_ecb && tinit->cipher_mode != cryptocop_cipher_mode_cbc) return -EINVAL;
+ default:
+ break;
+ }
+ return 0;
+}
+
+
+int cryptocop_new_session(cryptocop_session_id *sid, struct cryptocop_transform_init *tinit, int alloc_flag)
+{
+ struct cryptocop_session *sess;
+ struct cryptocop_transform_init *tfrm_in = tinit;
+ struct cryptocop_transform_init *tmp_in;
+ int no_tfrms = 0;
+ int i;
+ unsigned long int flags;
+
+ init_stream_coprocessor(); /* For safety if we are called early */
+
+ while (tfrm_in){
+ int err;
+ ++no_tfrms;
+ if ((err = transform_ok(tfrm_in))) {
+ DEBUG_API(printk("cryptocop_new_session, bad transform\n"));
+ return err;
+ }
+ tfrm_in = tfrm_in->next;
+ }
+ if (0 == no_tfrms) {
+ DEBUG_API(printk("cryptocop_new_session, no transforms specified\n"));
+ return -EINVAL;
+ }
+
+ sess = kmalloc(sizeof(struct cryptocop_session), alloc_flag);
+ if (!sess){
+ DEBUG_API(printk("cryptocop_new_session, kmalloc cryptocop_session\n"));
+ return -ENOMEM;
+ }
+
+ sess->tfrm_ctx = kmalloc(no_tfrms * sizeof(struct cryptocop_transform_ctx), alloc_flag);
+ if (!sess->tfrm_ctx) {
+ DEBUG_API(printk("cryptocop_new_session, kmalloc cryptocop_transform_ctx\n"));
+ kfree(sess);
+ return -ENOMEM;
+ }
+
+ tfrm_in = tinit;
+ for (i = 0; i < no_tfrms; i++){
+ tmp_in = tfrm_in->next;
+ while (tmp_in){
+ if (tmp_in->tid == tfrm_in->tid) {
+ DEBUG_API(printk("cryptocop_new_session, duplicate transform ids\n"));
+ kfree(sess->tfrm_ctx);
+ kfree(sess);
+ return -EINVAL;
+ }
+ tmp_in = tmp_in->next;
+ }
+ memcpy(&sess->tfrm_ctx[i].init, tfrm_in, sizeof(struct cryptocop_transform_init));
+ sess->tfrm_ctx[i].dec_key_set = 0;
+ sess->tfrm_ctx[i].next = &sess->tfrm_ctx[i] + 1;
+
+ tfrm_in = tfrm_in->next;
+ }
+ sess->tfrm_ctx[i-1].next = NULL;
+
+ spin_lock_irqsave(&cryptocop_sessions_lock, flags);
+ sess->sid = next_sid;
+ next_sid++;
+ /* TODO If we are really paranoid we should do duplicate check to handle sid wraparound.
+ * OTOH 2^64 is a really large number of session. */
+ if (next_sid == 0) next_sid = 1;
+
+ /* Prepend to session list. */
+ sess->next = cryptocop_sessions;
+ cryptocop_sessions = sess;
+ spin_unlock_irqrestore(&cryptocop_sessions_lock, flags);
+ *sid = sess->sid;
+ return 0;
+}
+
+
+int cryptocop_free_session(cryptocop_session_id sid)
+{
+ struct cryptocop_transform_ctx *tc;
+ struct cryptocop_session *sess = NULL;
+ struct cryptocop_session *psess = NULL;
+ unsigned long int flags;
+ int i;
+ LIST_HEAD(remove_list);
+ struct list_head *node, *tmp;
+ struct cryptocop_prio_job *pj;
+
+ DEBUG(printk("cryptocop_free_session: sid=%lld\n", sid));
+
+ spin_lock_irqsave(&cryptocop_sessions_lock, flags);
+ sess = cryptocop_sessions;
+ while (sess && sess->sid != sid){
+ psess = sess;
+ sess = sess->next;
+ }
+ if (sess){
+ if (psess){
+ psess->next = sess->next;
+ } else {
+ cryptocop_sessions = sess->next;
+ }
+ }
+ spin_unlock_irqrestore(&cryptocop_sessions_lock, flags);
+
+ if (!sess) return -EINVAL;
+
+ /* Remove queued jobs. */
+ spin_lock_irqsave(&cryptocop_job_queue_lock, flags);
+
+ for (i = 0; i < cryptocop_prio_no_prios; i++){
+ if (!list_empty(&(cryptocop_job_queues[i].jobs))){
+ list_for_each_safe(node, tmp, &(cryptocop_job_queues[i].jobs)) {
+ pj = list_entry(node, struct cryptocop_prio_job, node);
+ if (pj->oper->sid == sid) {
+ list_move_tail(node, &remove_list);
+ }
+ }
+ }
+ }
+ spin_unlock_irqrestore(&cryptocop_job_queue_lock, flags);
+
+ list_for_each_safe(node, tmp, &remove_list) {
+ list_del(node);
+ pj = list_entry(node, struct cryptocop_prio_job, node);
+ pj->oper->operation_status = -EAGAIN; /* EAGAIN is not ideal for job/session terminated but it's the best choice I know of. */
+ DEBUG(printk("cryptocop_free_session: pj=0x%p, pj->oper=0x%p, pj->iop=0x%p\n", pj, pj->oper, pj->iop));
+ pj->oper->cb(pj->oper, pj->oper->cb_data);
+ delete_internal_operation(pj->iop);
+ kfree(pj);
+ }
+
+ tc = sess->tfrm_ctx;
+ /* Erase keying data. */
+ while (tc){
+ DEBUG(printk("cryptocop_free_session: memset keys, tfrm id=%d\n", tc->init.tid));
+ memset(tc->init.key, 0xff, CRYPTOCOP_MAX_KEY_LENGTH);
+ memset(tc->dec_key, 0xff, CRYPTOCOP_MAX_KEY_LENGTH);
+ tc = tc->next;
+ }
+ kfree(sess->tfrm_ctx);
+ kfree(sess);
+
+ return 0;
+}
+
+static struct cryptocop_session *get_session(cryptocop_session_id sid)
+{
+ struct cryptocop_session *sess;
+ unsigned long int flags;
+
+ spin_lock_irqsave(&cryptocop_sessions_lock, flags);
+ sess = cryptocop_sessions;
+ while (sess && (sess->sid != sid)){
+ sess = sess->next;
+ }
+ spin_unlock_irqrestore(&cryptocop_sessions_lock, flags);
+
+ return sess;
+}
+
+static struct cryptocop_transform_ctx *get_transform_ctx(struct cryptocop_session *sess, cryptocop_tfrm_id tid)
+{
+ struct cryptocop_transform_ctx *tc = sess->tfrm_ctx;
+
+ DEBUG(printk("get_transform_ctx, sess=0x%p, tid=%d\n", sess, tid));
+ assert(sess != NULL);
+ while (tc && tc->init.tid != tid){
+ DEBUG(printk("tc=0x%p, tc->next=0x%p\n", tc, tc->next));
+ tc = tc->next;
+ }
+ DEBUG(printk("get_transform_ctx, returning tc=0x%p\n", tc));
+ return tc;
+}
+
+
+
+/* The AES s-transform matrix (s-box). */
+static const u8 aes_sbox[256] = {
+ 99, 124, 119, 123, 242, 107, 111, 197, 48, 1, 103, 43, 254, 215, 171, 118,
+ 202, 130, 201, 125, 250, 89, 71, 240, 173, 212, 162, 175, 156, 164, 114, 192,
+ 183, 253, 147, 38, 54, 63, 247, 204, 52, 165, 229, 241, 113, 216, 49, 21,
+ 4, 199, 35, 195, 24, 150, 5, 154, 7, 18, 128, 226, 235, 39, 178, 117,
+ 9, 131, 44, 26, 27, 110, 90, 160, 82, 59, 214, 179, 41, 227, 47, 132,
+ 83, 209, 0, 237, 32, 252, 177, 91, 106, 203, 190, 57, 74, 76, 88, 207,
+ 208, 239, 170, 251, 67, 77, 51, 133, 69, 249, 2, 127, 80, 60, 159, 168,
+ 81, 163, 64, 143, 146, 157, 56, 245, 188, 182, 218, 33, 16, 255, 243, 210,
+ 205, 12, 19, 236, 95, 151, 68, 23, 196, 167, 126, 61, 100, 93, 25, 115,
+ 96, 129, 79, 220, 34, 42, 144, 136, 70, 238, 184, 20, 222, 94, 11, 219,
+ 224, 50, 58, 10, 73, 6, 36, 92, 194, 211, 172, 98, 145, 149, 228, 121,
+ 231, 200, 55, 109, 141, 213, 78, 169, 108, 86, 244, 234, 101, 122, 174, 8,
+ 186, 120, 37, 46, 28, 166, 180, 198, 232, 221, 116, 31, 75, 189, 139, 138,
+ 112, 62, 181, 102, 72, 3, 246, 14, 97, 53, 87, 185, 134, 193, 29, 158,
+ 225, 248, 152, 17, 105, 217, 142, 148, 155, 30, 135, 233, 206, 85, 40, 223,
+ 140, 161, 137, 13, 191, 230, 66, 104, 65, 153, 45, 15, 176, 84, 187, 22
+};
+
+/* AES has a 32 bit word round constants for each round in the
+ * key schedule. round_constant[i] is really Rcon[i+1] in FIPS187.
+ */
+static u32 round_constant[11] = {
+ 0x01000000, 0x02000000, 0x04000000, 0x08000000,
+ 0x10000000, 0x20000000, 0x40000000, 0x80000000,
+ 0x1B000000, 0x36000000, 0x6C000000
+};
+
+/* Apply the s-box to each of the four occtets in w. */
+static u32 aes_ks_subword(const u32 w)
+{
+ u8 bytes[4];
+
+ *(u32*)(&bytes[0]) = w;
+ bytes[0] = aes_sbox[bytes[0]];
+ bytes[1] = aes_sbox[bytes[1]];
+ bytes[2] = aes_sbox[bytes[2]];
+ bytes[3] = aes_sbox[bytes[3]];
+ return *(u32*)(&bytes[0]);
+}
+
+/* The encrypt (forward) Rijndael key schedule algorithm pseudo code:
+ * (Note that AES words are 32 bit long)
+ *
+ * KeyExpansion(byte key[4*Nk], word w[Nb*(Nr+1)], Nk){
+ * word temp
+ * i = 0
+ * while (i < Nk) {
+ * w[i] = word(key[4*i, 4*i + 1, 4*i + 2, 4*i + 3])
+ * i = i + 1
+ * }
+ * i = Nk
+ *
+ * while (i < (Nb * (Nr + 1))) {
+ * temp = w[i - 1]
+ * if ((i mod Nk) == 0) {
+ * temp = SubWord(RotWord(temp)) xor Rcon[i/Nk]
+ * }
+ * else if ((Nk > 6) && ((i mod Nk) == 4)) {
+ * temp = SubWord(temp)
+ * }
+ * w[i] = w[i - Nk] xor temp
+ * }
+ * RotWord(t) does a 8 bit cyclic shift left on a 32 bit word.
+ * SubWord(t) applies the AES s-box individually to each octet
+ * in a 32 bit word.
+ *
+ * For AES Nk can have the values 4, 6, and 8 (corresponding to
+ * values for Nr of 10, 12, and 14). Nb is always 4.
+ *
+ * To construct w[i], w[i - 1] and w[i - Nk] must be
+ * available. Consequently we must keep a state of the last Nk words
+ * to be able to create the last round keys.
+ */
+static void get_aes_decrypt_key(unsigned char *dec_key, const unsigned char *key, unsigned int keylength)
+{
+ u32 temp;
+ u32 w_ring[8]; /* nk is max 8, use elements 0..(nk - 1) as a ringbuffer */
+ u8 w_last_ix;
+ int i;
+ u8 nr, nk;
+
+ switch (keylength){
+ case 128:
+ nk = 4;
+ nr = 10;
+ break;
+ case 192:
+ nk = 6;
+ nr = 12;
+ break;
+ case 256:
+ nk = 8;
+ nr = 14;
+ break;
+ default:
+ panic("stream co-processor: bad aes key length in get_aes_decrypt_key\n");
+ };
+
+ /* Need to do host byte order correction here since key is byte oriented and the
+ * kx algorithm is word (u32) oriented. */
+ for (i = 0; i < nk; i+=1) {
+ w_ring[i] = be32_to_cpu(*(u32*)&key[4*i]);
+ }
+
+ i = (int)nk;
+ w_last_ix = i - 1;
+ while (i < (4 * (nr + 2))) {
+ temp = w_ring[w_last_ix];
+ if (!(i % nk)) {
+ /* RotWord(temp) */
+ temp = (temp << 8) | (temp >> 24);
+ temp = aes_ks_subword(temp);
+ temp ^= round_constant[i/nk - 1];
+ } else if ((nk > 6) && ((i % nk) == 4)) {
+ temp = aes_ks_subword(temp);
+ }
+ w_last_ix = (w_last_ix + 1) % nk; /* This is the same as (i-Nk) mod Nk */
+ temp ^= w_ring[w_last_ix];
+ w_ring[w_last_ix] = temp;
+
+ /* We need the round keys for round Nr+1 and Nr+2 (round key
+ * Nr+2 is the round key beyond the last one used when
+ * encrypting). Rounds are numbered starting from 0, Nr=10
+ * implies 11 rounds are used in encryption/decryption.
+ */
+ if (i >= (4 * nr)) {
+ /* Need to do host byte order correction here, the key
+ * is byte oriented. */
+ *(u32*)dec_key = cpu_to_be32(temp);
+ dec_key += 4;
+ }
+ ++i;
+ }
+}
+
+
+/**** Job/operation management. ****/
+
+int cryptocop_job_queue_insert_csum(struct cryptocop_operation *operation)
+{
+ return cryptocop_job_queue_insert(cryptocop_prio_kernel_csum, operation);
+}
+
+int cryptocop_job_queue_insert_crypto(struct cryptocop_operation *operation)
+{
+ return cryptocop_job_queue_insert(cryptocop_prio_kernel, operation);
+}
+
+int cryptocop_job_queue_insert_user_job(struct cryptocop_operation *operation)
+{
+ return cryptocop_job_queue_insert(cryptocop_prio_user, operation);
+}
+
+static int cryptocop_job_queue_insert(cryptocop_queue_priority prio, struct cryptocop_operation *operation)
+{
+ int ret;
+ struct cryptocop_prio_job *pj = NULL;
+ unsigned long int flags;
+
+ DEBUG(printk("cryptocop_job_queue_insert(%d, 0x%p)\n", prio, operation));
+
+ if (!operation || !operation->cb){
+ DEBUG_API(printk("cryptocop_job_queue_insert oper=0x%p, NULL operation or callback\n", operation));
+ return -EINVAL;
+ }
+
+ if ((ret = cryptocop_job_setup(&pj, operation)) != 0){
+ DEBUG_API(printk("cryptocop_job_queue_insert: job setup failed\n"));
+ return ret;
+ }
+ assert(pj != NULL);
+
+ spin_lock_irqsave(&cryptocop_job_queue_lock, flags);
+ list_add_tail(&pj->node, &cryptocop_job_queues[prio].jobs);
+ spin_unlock_irqrestore(&cryptocop_job_queue_lock, flags);
+
+ /* Make sure a job is running */
+ cryptocop_start_job();
+ return 0;
+}
+
+static void cryptocop_do_tasklet(unsigned long unused);
+DECLARE_TASKLET (cryptocop_tasklet, cryptocop_do_tasklet, 0);
+
+static void cryptocop_do_tasklet(unsigned long unused)
+{
+ struct list_head *node;
+ struct cryptocop_prio_job *pj = NULL;
+ unsigned long flags;
+
+ DEBUG(printk("cryptocop_do_tasklet: entering\n"));
+
+ do {
+ spin_lock_irqsave(&cryptocop_completed_jobs_lock, flags);
+ if (!list_empty(&cryptocop_completed_jobs)){
+ node = cryptocop_completed_jobs.next;
+ list_del(node);
+ pj = list_entry(node, struct cryptocop_prio_job, node);
+ } else {
+ pj = NULL;
+ }
+ spin_unlock_irqrestore(&cryptocop_completed_jobs_lock, flags);
+ if (pj) {
+ assert(pj->oper != NULL);
+
+ /* Notify consumer of operation completeness. */
+ DEBUG(printk("cryptocop_do_tasklet: callback 0x%p, data 0x%p\n", pj->oper->cb, pj->oper->cb_data));
+
+ pj->oper->operation_status = 0; /* Job is completed. */
+ pj->oper->cb(pj->oper, pj->oper->cb_data);
+ delete_internal_operation(pj->iop);
+ kfree(pj);
+ }
+ } while (pj != NULL);
+
+ DEBUG(printk("cryptocop_do_tasklet: exiting\n"));
+}
+
+static irqreturn_t
+dma_done_interrupt(int irq, void *dev_id)
+{
+ struct cryptocop_prio_job *done_job;
+ reg_dma_rw_ack_intr ack_intr = {
+ .data = 1,
+ };
+
+ REG_WR(dma, IN_DMA_INST, rw_ack_intr, ack_intr);
+
+ DEBUG(printk("cryptocop DMA done\n"));
+
+ spin_lock(&running_job_lock);
+ if (cryptocop_running_job == NULL){
+ printk("stream co-processor got interrupt when not busy\n");
+ spin_unlock(&running_job_lock);
+ return IRQ_HANDLED;
+ }
+ done_job = cryptocop_running_job;
+ cryptocop_running_job = NULL;
+ spin_unlock(&running_job_lock);
+
+ /* Start processing a job. */
+ if (!spin_trylock(&cryptocop_process_lock)){
+ DEBUG(printk("cryptocop irq handler, not starting a job\n"));
+ } else {
+ cryptocop_start_job();
+ spin_unlock(&cryptocop_process_lock);
+ }
+
+ done_job->oper->operation_status = 0; /* Job is completed. */
+ if (done_job->oper->fast_callback){
+ /* This operation wants callback from interrupt. */
+ done_job->oper->cb(done_job->oper, done_job->oper->cb_data);
+ delete_internal_operation(done_job->iop);
+ kfree(done_job);
+ } else {
+ spin_lock(&cryptocop_completed_jobs_lock);
+ list_add_tail(&(done_job->node), &cryptocop_completed_jobs);
+ spin_unlock(&cryptocop_completed_jobs_lock);
+ tasklet_schedule(&cryptocop_tasklet);
+ }
+
+ DEBUG(printk("cryptocop leave irq handler\n"));
+ return IRQ_HANDLED;
+}
+
+
+/* Setup interrupts and DMA channels. */
+static int init_cryptocop(void)
+{
+ unsigned long flags;
+ reg_dma_rw_cfg dma_cfg = {.en = 1};
+ reg_dma_rw_intr_mask intr_mask_in = {.data = regk_dma_yes}; /* Only want descriptor interrupts from the DMA in channel. */
+ reg_dma_rw_ack_intr ack_intr = {.data = 1,.in_eop = 1 };
+ reg_strcop_rw_cfg strcop_cfg = {
+ .ipend = regk_strcop_little,
+ .td1 = regk_strcop_e,
+ .td2 = regk_strcop_d,
+ .td3 = regk_strcop_e,
+ .ignore_sync = 0,
+ .en = 1
+ };
+
+ if (request_irq(DMA_IRQ, dma_done_interrupt, 0,
+ "stream co-processor DMA", NULL))
+ panic("request_irq stream co-processor irq dma9");
+
+ (void)crisv32_request_dma(OUT_DMA, "strcop", DMA_PANIC_ON_ERROR,
+ 0, dma_strp);
+ (void)crisv32_request_dma(IN_DMA, "strcop", DMA_PANIC_ON_ERROR,
+ 0, dma_strp);
+
+ local_irq_save(flags);
+
+ /* Reset and enable the cryptocop. */
+ strcop_cfg.en = 0;
+ REG_WR(strcop, regi_strcop, rw_cfg, strcop_cfg);
+ strcop_cfg.en = 1;
+ REG_WR(strcop, regi_strcop, rw_cfg, strcop_cfg);
+
+ /* Enable DMAs. */
+ REG_WR(dma, IN_DMA_INST, rw_cfg, dma_cfg); /* input DMA */
+ REG_WR(dma, OUT_DMA_INST, rw_cfg, dma_cfg); /* output DMA */
+
+ /* Set up wordsize = 4 for DMAs. */
+ DMA_WR_CMD(OUT_DMA_INST, regk_dma_set_w_size4);
+ DMA_WR_CMD(IN_DMA_INST, regk_dma_set_w_size4);
+
+ /* Enable interrupts. */
+ REG_WR(dma, IN_DMA_INST, rw_intr_mask, intr_mask_in);
+
+ /* Clear intr ack. */
+ REG_WR(dma, IN_DMA_INST, rw_ack_intr, ack_intr);
+
+ local_irq_restore(flags);
+
+ return 0;
+}
+
+/* Free used cryptocop hw resources (interrupt and DMA channels). */
+static void release_cryptocop(void)
+{
+ unsigned long flags;
+ reg_dma_rw_cfg dma_cfg = {.en = 0};
+ reg_dma_rw_intr_mask intr_mask_in = {0};
+ reg_dma_rw_ack_intr ack_intr = {.data = 1,.in_eop = 1 };
+
+ local_irq_save(flags);
+
+ /* Clear intr ack. */
+ REG_WR(dma, IN_DMA_INST, rw_ack_intr, ack_intr);
+
+ /* Disable DMAs. */
+ REG_WR(dma, IN_DMA_INST, rw_cfg, dma_cfg); /* input DMA */
+ REG_WR(dma, OUT_DMA_INST, rw_cfg, dma_cfg); /* output DMA */
+
+ /* Disable interrupts. */
+ REG_WR(dma, IN_DMA_INST, rw_intr_mask, intr_mask_in);
+
+ local_irq_restore(flags);
+
+ free_irq(DMA_IRQ, NULL);
+
+ (void)crisv32_free_dma(OUT_DMA);
+ (void)crisv32_free_dma(IN_DMA);
+}
+
+
+/* Init job queue. */
+static int cryptocop_job_queue_init(void)
+{
+ int i;
+
+ INIT_LIST_HEAD(&cryptocop_completed_jobs);
+
+ for (i = 0; i < cryptocop_prio_no_prios; i++){
+ cryptocop_job_queues[i].prio = (cryptocop_queue_priority)i;
+ INIT_LIST_HEAD(&cryptocop_job_queues[i].jobs);
+ }
+ return 0;
+}
+
+
+static void cryptocop_job_queue_close(void)
+{
+ struct list_head *node, *tmp;
+ struct cryptocop_prio_job *pj = NULL;
+ unsigned long int process_flags, flags;
+ int i;
+
+ /* FIXME: This is as yet untested code. */
+
+ /* Stop strcop from getting an operation to process while we are closing the
+ module. */
+ spin_lock_irqsave(&cryptocop_process_lock, process_flags);
+
+ /* Empty the job queue. */
+ for (i = 0; i < cryptocop_prio_no_prios; i++){
+ if (!list_empty(&(cryptocop_job_queues[i].jobs))){
+ list_for_each_safe(node, tmp, &(cryptocop_job_queues[i].jobs)) {
+ pj = list_entry(node, struct cryptocop_prio_job, node);
+ list_del(node);
+
+ /* Call callback to notify consumer of job removal. */
+ DEBUG(printk("cryptocop_job_queue_close: callback 0x%p, data 0x%p\n", pj->oper->cb, pj->oper->cb_data));
+ pj->oper->operation_status = -EINTR; /* Job is terminated without completion. */
+ pj->oper->cb(pj->oper, pj->oper->cb_data);
+
+ delete_internal_operation(pj->iop);
+ kfree(pj);
+ }
+ }
+ }
+ spin_unlock_irqrestore(&cryptocop_process_lock, process_flags);
+
+ /* Remove the running job, if any. */
+ spin_lock_irqsave(&running_job_lock, flags);
+ if (cryptocop_running_job){
+ reg_strcop_rw_cfg rw_cfg;
+ reg_dma_rw_cfg dma_out_cfg, dma_in_cfg;
+
+ /* Stop DMA. */
+ dma_out_cfg = REG_RD(dma, OUT_DMA_INST, rw_cfg);
+ dma_out_cfg.en = regk_dma_no;
+ REG_WR(dma, OUT_DMA_INST, rw_cfg, dma_out_cfg);
+
+ dma_in_cfg = REG_RD(dma, IN_DMA_INST, rw_cfg);
+ dma_in_cfg.en = regk_dma_no;
+ REG_WR(dma, IN_DMA_INST, rw_cfg, dma_in_cfg);
+
+ /* Disble the cryptocop. */
+ rw_cfg = REG_RD(strcop, regi_strcop, rw_cfg);
+ rw_cfg.en = 0;
+ REG_WR(strcop, regi_strcop, rw_cfg, rw_cfg);
+
+ pj = cryptocop_running_job;
+ cryptocop_running_job = NULL;
+
+ /* Call callback to notify consumer of job removal. */
+ DEBUG(printk("cryptocop_job_queue_close: callback 0x%p, data 0x%p\n", pj->oper->cb, pj->oper->cb_data));
+ pj->oper->operation_status = -EINTR; /* Job is terminated without completion. */
+ pj->oper->cb(pj->oper, pj->oper->cb_data);
+
+ delete_internal_operation(pj->iop);
+ kfree(pj);
+ }
+ spin_unlock_irqrestore(&running_job_lock, flags);
+
+ /* Remove completed jobs, if any. */
+ spin_lock_irqsave(&cryptocop_completed_jobs_lock, flags);
+
+ list_for_each_safe(node, tmp, &cryptocop_completed_jobs) {
+ pj = list_entry(node, struct cryptocop_prio_job, node);
+ list_del(node);
+ /* Call callback to notify consumer of job removal. */
+ DEBUG(printk("cryptocop_job_queue_close: callback 0x%p, data 0x%p\n", pj->oper->cb, pj->oper->cb_data));
+ pj->oper->operation_status = -EINTR; /* Job is terminated without completion. */
+ pj->oper->cb(pj->oper, pj->oper->cb_data);
+
+ delete_internal_operation(pj->iop);
+ kfree(pj);
+ }
+ spin_unlock_irqrestore(&cryptocop_completed_jobs_lock, flags);
+}
+
+
+static void cryptocop_start_job(void)
+{
+ int i;
+ struct cryptocop_prio_job *pj;
+ unsigned long int flags;
+ unsigned long int running_job_flags;
+ reg_strcop_rw_cfg rw_cfg = {.en = 1, .ignore_sync = 0};
+
+ DEBUG(printk("cryptocop_start_job: entering\n"));
+
+ spin_lock_irqsave(&running_job_lock, running_job_flags);
+ if (cryptocop_running_job != NULL){
+ /* Already running. */
+ DEBUG(printk("cryptocop_start_job: already running, exit\n"));
+ spin_unlock_irqrestore(&running_job_lock, running_job_flags);
+ return;
+ }
+ spin_lock_irqsave(&cryptocop_job_queue_lock, flags);
+
+ /* Check the queues in priority order. */
+ for (i = cryptocop_prio_kernel_csum; (i < cryptocop_prio_no_prios) && list_empty(&cryptocop_job_queues[i].jobs); i++);
+ if (i == cryptocop_prio_no_prios) {
+ spin_unlock_irqrestore(&cryptocop_job_queue_lock, flags);
+ spin_unlock_irqrestore(&running_job_lock, running_job_flags);
+ DEBUG(printk("cryptocop_start_job: no jobs to run\n"));
+ return; /* No jobs to run */
+ }
+ DEBUG(printk("starting job for prio %d\n", i));
+
+ /* TODO: Do not starve lower priority jobs. Let in a lower
+ * prio job for every N-th processed higher prio job or some
+ * other scheduling policy. This could reasonably be
+ * tweakable since the optimal balance would depend on the
+ * type of load on the system. */
+
+ /* Pull the DMA lists from the job and start the DMA client. */
+ pj = list_entry(cryptocop_job_queues[i].jobs.next, struct cryptocop_prio_job, node);
+ list_del(&pj->node);
+ spin_unlock_irqrestore(&cryptocop_job_queue_lock, flags);
+ cryptocop_running_job = pj;
+
+ /* Set config register (3DES and CSUM modes). */
+ switch (pj->iop->tdes_mode){
+ case cryptocop_3des_eee:
+ rw_cfg.td1 = regk_strcop_e;
+ rw_cfg.td2 = regk_strcop_e;
+ rw_cfg.td3 = regk_strcop_e;
+ break;
+ case cryptocop_3des_eed:
+ rw_cfg.td1 = regk_strcop_e;
+ rw_cfg.td2 = regk_strcop_e;
+ rw_cfg.td3 = regk_strcop_d;
+ break;
+ case cryptocop_3des_ede:
+ rw_cfg.td1 = regk_strcop_e;
+ rw_cfg.td2 = regk_strcop_d;
+ rw_cfg.td3 = regk_strcop_e;
+ break;
+ case cryptocop_3des_edd:
+ rw_cfg.td1 = regk_strcop_e;
+ rw_cfg.td2 = regk_strcop_d;
+ rw_cfg.td3 = regk_strcop_d;
+ break;
+ case cryptocop_3des_dee:
+ rw_cfg.td1 = regk_strcop_d;
+ rw_cfg.td2 = regk_strcop_e;
+ rw_cfg.td3 = regk_strcop_e;
+ break;
+ case cryptocop_3des_ded:
+ rw_cfg.td1 = regk_strcop_d;
+ rw_cfg.td2 = regk_strcop_e;
+ rw_cfg.td3 = regk_strcop_d;
+ break;
+ case cryptocop_3des_dde:
+ rw_cfg.td1 = regk_strcop_d;
+ rw_cfg.td2 = regk_strcop_d;
+ rw_cfg.td3 = regk_strcop_e;
+ break;
+ case cryptocop_3des_ddd:
+ rw_cfg.td1 = regk_strcop_d;
+ rw_cfg.td2 = regk_strcop_d;
+ rw_cfg.td3 = regk_strcop_d;
+ break;
+ default:
+ DEBUG(printk("cryptocop_setup_dma_list: bad 3DES mode\n"));
+ }
+ switch (pj->iop->csum_mode){
+ case cryptocop_csum_le:
+ rw_cfg.ipend = regk_strcop_little;
+ break;
+ case cryptocop_csum_be:
+ rw_cfg.ipend = regk_strcop_big;
+ break;
+ default:
+ DEBUG(printk("cryptocop_setup_dma_list: bad checksum mode\n"));
+ }
+ REG_WR(strcop, regi_strcop, rw_cfg, rw_cfg);
+
+ DEBUG(printk("cryptocop_start_job: starting DMA, new cryptocop_running_job=0x%p\n"
+ "ctx_in: 0x%p, phys: 0x%p\n"
+ "ctx_out: 0x%p, phys: 0x%p\n",
+ pj,
+ &pj->iop->ctx_in, (char*)virt_to_phys(&pj->iop->ctx_in),
+ &pj->iop->ctx_out, (char*)virt_to_phys(&pj->iop->ctx_out)));
+
+ /* Start input DMA. */
+ flush_dma_context(&pj->iop->ctx_in);
+ DMA_START_CONTEXT(IN_DMA_INST, virt_to_phys(&pj->iop->ctx_in));
+
+ /* Start output DMA. */
+ DMA_START_CONTEXT(OUT_DMA_INST, virt_to_phys(&pj->iop->ctx_out));
+
+ spin_unlock_irqrestore(&running_job_lock, running_job_flags);
+ DEBUG(printk("cryptocop_start_job: exiting\n"));
+}
+
+
+static int cryptocop_job_setup(struct cryptocop_prio_job **pj, struct cryptocop_operation *operation)
+{
+ int err;
+ int alloc_flag = operation->in_interrupt ? GFP_ATOMIC : GFP_KERNEL;
+ void *iop_alloc_ptr = NULL;
+
+ *pj = kmalloc(sizeof (struct cryptocop_prio_job), alloc_flag);
+ if (!*pj) return -ENOMEM;
+
+ DEBUG(printk("cryptocop_job_setup: operation=0x%p\n", operation));
+
+ (*pj)->oper = operation;
+ DEBUG(printk("cryptocop_job_setup, cb=0x%p cb_data=0x%p\n", (*pj)->oper->cb, (*pj)->oper->cb_data));
+
+ if (operation->use_dmalists) {
+ DEBUG(print_user_dma_lists(&operation->list_op));
+ if (!operation->list_op.inlist || !operation->list_op.outlist || !operation->list_op.out_data_buf || !operation->list_op.in_data_buf){
+ DEBUG_API(printk("cryptocop_job_setup: bad indata (use_dmalists)\n"));
+ kfree(*pj);
+ return -EINVAL;
+ }
+ iop_alloc_ptr = kmalloc(DESCR_ALLOC_PAD + sizeof(struct cryptocop_int_operation), alloc_flag);
+ if (!iop_alloc_ptr) {
+ DEBUG_API(printk("cryptocop_job_setup: kmalloc cryptocop_int_operation\n"));
+ kfree(*pj);
+ return -ENOMEM;
+ }
+ (*pj)->iop = (struct cryptocop_int_operation*)(((unsigned long int)(iop_alloc_ptr + DESCR_ALLOC_PAD + offsetof(struct cryptocop_int_operation, ctx_out)) & ~0x0000001F) - offsetof(struct cryptocop_int_operation, ctx_out));
+ DEBUG(memset((*pj)->iop, 0xff, sizeof(struct cryptocop_int_operation)));
+ (*pj)->iop->alloc_ptr = iop_alloc_ptr;
+ (*pj)->iop->sid = operation->sid;
+ (*pj)->iop->cdesc_out = NULL;
+ (*pj)->iop->cdesc_in = NULL;
+ (*pj)->iop->tdes_mode = operation->list_op.tdes_mode;
+ (*pj)->iop->csum_mode = operation->list_op.csum_mode;
+ (*pj)->iop->ddesc_out = operation->list_op.outlist;
+ (*pj)->iop->ddesc_in = operation->list_op.inlist;
+
+ /* Setup DMA contexts. */
+ (*pj)->iop->ctx_out.next = NULL;
+ (*pj)->iop->ctx_out.eol = 1;
+ (*pj)->iop->ctx_out.saved_data = operation->list_op.outlist;
+ (*pj)->iop->ctx_out.saved_data_buf = operation->list_op.out_data_buf;
+
+ (*pj)->iop->ctx_in.next = NULL;
+ (*pj)->iop->ctx_in.eol = 1;
+ (*pj)->iop->ctx_in.saved_data = operation->list_op.inlist;
+ (*pj)->iop->ctx_in.saved_data_buf = operation->list_op.in_data_buf;
+ } else {
+ if ((err = cryptocop_setup_dma_list(operation, &(*pj)->iop, alloc_flag))) {
+ DEBUG_API(printk("cryptocop_job_setup: cryptocop_setup_dma_list failed %d\n", err));
+ kfree(*pj);
+ return err;
+ }
+ }
+ DEBUG(print_dma_descriptors((*pj)->iop));
+
+ DEBUG(printk("cryptocop_job_setup, DMA list setup successful\n"));
+
+ return 0;
+}
+
+static int cryptocop_open(struct inode *inode, struct file *filp)
+{
+ int p = iminor(inode);
+
+ if (p != CRYPTOCOP_MINOR) return -EINVAL;
+
+ filp->private_data = NULL;
+ return 0;
+}
+
+
+static int cryptocop_release(struct inode *inode, struct file *filp)
+{
+ struct cryptocop_private *dev = filp->private_data;
+ struct cryptocop_private *dev_next;
+
+ while (dev){
+ dev_next = dev->next;
+ if (dev->sid != CRYPTOCOP_SESSION_ID_NONE) {
+ (void)cryptocop_free_session(dev->sid);
+ }
+ kfree(dev);
+ dev = dev_next;
+ }
+
+ return 0;
+}
+
+
+static int cryptocop_ioctl_close_session(struct inode *inode, struct file *filp,
+ unsigned int cmd, unsigned long arg)
+{
+ struct cryptocop_private *dev = filp->private_data;
+ struct cryptocop_private *prev_dev = NULL;
+ struct strcop_session_op *sess_op = (struct strcop_session_op *)arg;
+ struct strcop_session_op sop;
+ int err;
+
+ DEBUG(printk("cryptocop_ioctl_close_session\n"));
+
+ if (!access_ok(VERIFY_READ, sess_op, sizeof(struct strcop_session_op)))
+ return -EFAULT;
+ err = copy_from_user(&sop, sess_op, sizeof(struct strcop_session_op));
+ if (err) return -EFAULT;
+
+ while (dev && (dev->sid != sop.ses_id)) {
+ prev_dev = dev;
+ dev = dev->next;
+ }
+ if (dev){
+ if (prev_dev){
+ prev_dev->next = dev->next;
+ } else {
+ filp->private_data = dev->next;
+ }
+ err = cryptocop_free_session(dev->sid);
+ if (err) return -EFAULT;
+ } else {
+ DEBUG_API(printk("cryptocop_ioctl_close_session: session %lld not found\n", sop.ses_id));
+ return -EINVAL;
+ }
+ return 0;
+}
+
+
+static void ioctl_process_job_callback(struct cryptocop_operation *op, void*cb_data)
+{
+ struct ioctl_job_cb_ctx *jc = (struct ioctl_job_cb_ctx *)cb_data;
+
+ DEBUG(printk("ioctl_process_job_callback: op=0x%p, cb_data=0x%p\n", op, cb_data));
+
+ jc->processed = 1;
+ wake_up(&cryptocop_ioc_process_wq);
+}
+
+
+#define CRYPTOCOP_IOCTL_CIPHER_TID (1)
+#define CRYPTOCOP_IOCTL_DIGEST_TID (2)
+#define CRYPTOCOP_IOCTL_CSUM_TID (3)
+
+static size_t first_cfg_change_ix(struct strcop_crypto_op *crp_op)
+{
+ size_t ch_ix = 0;
+
+ if (crp_op->do_cipher) ch_ix = crp_op->cipher_start;
+ if (crp_op->do_digest && (crp_op->digest_start < ch_ix)) ch_ix = crp_op->digest_start;
+ if (crp_op->do_csum && (crp_op->csum_start < ch_ix)) ch_ix = crp_op->csum_start;
+
+ DEBUG(printk("first_cfg_change_ix: ix=%d\n", ch_ix));
+ return ch_ix;
+}
+
+
+static size_t next_cfg_change_ix(struct strcop_crypto_op *crp_op, size_t ix)
+{
+ size_t ch_ix = INT_MAX;
+ size_t tmp_ix = 0;
+
+ if (crp_op->do_cipher && ((crp_op->cipher_start + crp_op->cipher_len) > ix)){
+ if (crp_op->cipher_start > ix) {
+ ch_ix = crp_op->cipher_start;
+ } else {
+ ch_ix = crp_op->cipher_start + crp_op->cipher_len;
+ }
+ }
+ if (crp_op->do_digest && ((crp_op->digest_start + crp_op->digest_len) > ix)){
+ if (crp_op->digest_start > ix) {
+ tmp_ix = crp_op->digest_start;
+ } else {
+ tmp_ix = crp_op->digest_start + crp_op->digest_len;
+ }
+ if (tmp_ix < ch_ix) ch_ix = tmp_ix;
+ }
+ if (crp_op->do_csum && ((crp_op->csum_start + crp_op->csum_len) > ix)){
+ if (crp_op->csum_start > ix) {
+ tmp_ix = crp_op->csum_start;
+ } else {
+ tmp_ix = crp_op->csum_start + crp_op->csum_len;
+ }
+ if (tmp_ix < ch_ix) ch_ix = tmp_ix;
+ }
+ if (ch_ix == INT_MAX) ch_ix = ix;
+ DEBUG(printk("next_cfg_change_ix prev ix=%d, next ix=%d\n", ix, ch_ix));
+ return ch_ix;
+}
+
+
+/* Map map_length bytes from the pages starting on *pageix and *pageoffset to iovecs starting on *iovix.
+ * Return -1 for ok, 0 for fail. */
+static int map_pages_to_iovec(struct iovec *iov, int iovlen, int *iovix, struct page **pages, int nopages, int *pageix, int *pageoffset, int map_length )
+{
+ int tmplen;
+
+ assert(iov != NULL);
+ assert(iovix != NULL);
+ assert(pages != NULL);
+ assert(pageix != NULL);
+ assert(pageoffset != NULL);
+
+ DEBUG(printk("map_pages_to_iovec, map_length=%d, iovlen=%d, *iovix=%d, nopages=%d, *pageix=%d, *pageoffset=%d\n", map_length, iovlen, *iovix, nopages, *pageix, *pageoffset));
+
+ while (map_length > 0){
+ DEBUG(printk("map_pages_to_iovec, map_length=%d, iovlen=%d, *iovix=%d, nopages=%d, *pageix=%d, *pageoffset=%d\n", map_length, iovlen, *iovix, nopages, *pageix, *pageoffset));
+ if (*iovix >= iovlen){
+ DEBUG_API(printk("map_page_to_iovec: *iovix=%d >= iovlen=%d\n", *iovix, iovlen));
+ return 0;
+ }
+ if (*pageix >= nopages){
+ DEBUG_API(printk("map_page_to_iovec: *pageix=%d >= nopages=%d\n", *pageix, nopages));
+ return 0;
+ }
+ iov[*iovix].iov_base = (unsigned char*)page_address(pages[*pageix]) + *pageoffset;
+ tmplen = PAGE_SIZE - *pageoffset;
+ if (tmplen < map_length){
+ (*pageoffset) = 0;
+ (*pageix)++;
+ } else {
+ tmplen = map_length;
+ (*pageoffset) += map_length;
+ }
+ DEBUG(printk("mapping %d bytes from page %d (or %d) to iovec %d\n", tmplen, *pageix, *pageix-1, *iovix));
+ iov[*iovix].iov_len = tmplen;
+ map_length -= tmplen;
+ (*iovix)++;
+ }
+ DEBUG(printk("map_page_to_iovec, exit, *iovix=%d\n", *iovix));
+ return -1;
+}
+
+
+
+static int cryptocop_ioctl_process(struct inode *inode, struct file *filp, unsigned int cmd, unsigned long arg)
+{
+ int i;
+ struct cryptocop_private *dev = filp->private_data;
+ struct strcop_crypto_op *crp_oper = (struct strcop_crypto_op *)arg;
+ struct strcop_crypto_op oper = {0};
+ int err = 0;
+ struct cryptocop_operation *cop = NULL;
+
+ struct ioctl_job_cb_ctx *jc = NULL;
+
+ struct page **inpages = NULL;
+ struct page **outpages = NULL;
+ int noinpages = 0;
+ int nooutpages = 0;
+
+ struct cryptocop_desc descs[5]; /* Max 5 descriptors are needed, there are three transforms that
+ * can get connected/disconnected on different places in the indata. */
+ struct cryptocop_desc_cfg dcfgs[5*3];
+ int desc_ix = 0;
+ int dcfg_ix = 0;
+ struct cryptocop_tfrm_cfg ciph_tcfg = {0};
+ struct cryptocop_tfrm_cfg digest_tcfg = {0};
+ struct cryptocop_tfrm_cfg csum_tcfg = {0};
+
+ unsigned char *digest_result = NULL;
+ int digest_length = 0;
+ int cblocklen = 0;
+ unsigned char csum_result[CSUM_BLOCK_LENGTH];
+ struct cryptocop_session *sess;
+
+ int iovlen = 0;
+ int iovix = 0;
+ int pageix = 0;
+ int pageoffset = 0;
+
+ size_t prev_ix = 0;
+ size_t next_ix;
+
+ int cipher_active, digest_active, csum_active;
+ int end_digest, end_csum;
+ int digest_done = 0;
+ int cipher_done = 0;
+ int csum_done = 0;
+
+ DEBUG(printk("cryptocop_ioctl_process\n"));
+
+ if (!access_ok(VERIFY_WRITE, crp_oper, sizeof(struct strcop_crypto_op))){
+ DEBUG_API(printk("cryptocop_ioctl_process: !access_ok crp_oper!\n"));
+ return -EFAULT;
+ }
+ if (copy_from_user(&oper, crp_oper, sizeof(struct strcop_crypto_op))) {
+ DEBUG_API(printk("cryptocop_ioctl_process: copy_from_user\n"));
+ return -EFAULT;
+ }
+ DEBUG(print_strcop_crypto_op(&oper));
+
+ while (dev && dev->sid != oper.ses_id) dev = dev->next;
+ if (!dev){
+ DEBUG_API(printk("cryptocop_ioctl_process: session %lld not found\n", oper.ses_id));
+ return -EINVAL;
+ }
+
+ /* Check buffers. */
+ if (((oper.indata + oper.inlen) < oper.indata) || ((oper.cipher_outdata + oper.cipher_outlen) < oper.cipher_outdata)){
+ DEBUG_API(printk("cryptocop_ioctl_process: user buffers wrapped around, bad user!\n"));
+ return -EINVAL;
+ }
+
+ if (!access_ok(VERIFY_WRITE, oper.cipher_outdata, oper.cipher_outlen)){
+ DEBUG_API(printk("cryptocop_ioctl_process: !access_ok out data!\n"));
+ return -EFAULT;
+ }
+ if (!access_ok(VERIFY_READ, oper.indata, oper.inlen)){
+ DEBUG_API(printk("cryptocop_ioctl_process: !access_ok in data!\n"));
+ return -EFAULT;
+ }
+
+ cop = kmalloc(sizeof(struct cryptocop_operation), GFP_KERNEL);
+ if (!cop) {
+ DEBUG_API(printk("cryptocop_ioctl_process: kmalloc\n"));
+ return -ENOMEM;
+ }
+ jc = kmalloc(sizeof(struct ioctl_job_cb_ctx), GFP_KERNEL);
+ if (!jc) {
+ DEBUG_API(printk("cryptocop_ioctl_process: kmalloc\n"));
+ err = -ENOMEM;
+ goto error_cleanup;
+ }
+ jc->processed = 0;
+
+ cop->cb_data = jc;
+ cop->cb = ioctl_process_job_callback;
+ cop->operation_status = 0;
+ cop->use_dmalists = 0;
+ cop->in_interrupt = 0;
+ cop->fast_callback = 0;
+ cop->tfrm_op.tfrm_cfg = NULL;
+ cop->tfrm_op.desc = NULL;
+ cop->tfrm_op.indata = NULL;
+ cop->tfrm_op.incount = 0;
+ cop->tfrm_op.inlen = 0;
+ cop->tfrm_op.outdata = NULL;
+ cop->tfrm_op.outcount = 0;
+ cop->tfrm_op.outlen = 0;
+
+ sess = get_session(oper.ses_id);
+ if (!sess){
+ DEBUG_API(printk("cryptocop_ioctl_process: bad session id.\n"));
+ kfree(cop);
+ kfree(jc);
+ return -EINVAL;
+ }
+
+ if (oper.do_cipher) {
+ unsigned int cipher_outlen = 0;
+ struct cryptocop_transform_ctx *tc = get_transform_ctx(sess, CRYPTOCOP_IOCTL_CIPHER_TID);
+ if (!tc) {
+ DEBUG_API(printk("cryptocop_ioctl_process: no cipher transform in session.\n"));
+ err = -EINVAL;
+ goto error_cleanup;
+ }
+ ciph_tcfg.tid = CRYPTOCOP_IOCTL_CIPHER_TID;
+ ciph_tcfg.inject_ix = 0;
+ ciph_tcfg.flags = 0;
+ if ((oper.cipher_start < 0) || (oper.cipher_len <= 0) || (oper.cipher_start > oper.inlen) || ((oper.cipher_start + oper.cipher_len) > oper.inlen)){
+ DEBUG_API(printk("cryptocop_ioctl_process: bad cipher length\n"));
+ kfree(cop);
+ kfree(jc);
+ return -EINVAL;
+ }
+ cblocklen = tc->init.alg == cryptocop_alg_aes ? AES_BLOCK_LENGTH : DES_BLOCK_LENGTH;
+ if (oper.cipher_len % cblocklen) {
+ kfree(cop);
+ kfree(jc);
+ DEBUG_API(printk("cryptocop_ioctl_process: cipher inlength not multiple of block length.\n"));
+ return -EINVAL;
+ }
+ cipher_outlen = oper.cipher_len;
+ if (tc->init.cipher_mode == cryptocop_cipher_mode_cbc){
+ if (oper.cipher_explicit) {
+ ciph_tcfg.flags |= CRYPTOCOP_EXPLICIT_IV;
+ memcpy(ciph_tcfg.iv, oper.cipher_iv, cblocklen);
+ } else {
+ cipher_outlen = oper.cipher_len - cblocklen;
+ }
+ } else {
+ if (oper.cipher_explicit){
+ kfree(cop);
+ kfree(jc);
+ DEBUG_API(printk("cryptocop_ioctl_process: explicit_iv when not CBC mode\n"));
+ return -EINVAL;
+ }
+ }
+ if (oper.cipher_outlen != cipher_outlen) {
+ kfree(cop);
+ kfree(jc);
+ DEBUG_API(printk("cryptocop_ioctl_process: cipher_outlen incorrect, should be %d not %d.\n", cipher_outlen, oper.cipher_outlen));
+ return -EINVAL;
+ }
+
+ if (oper.decrypt){
+ ciph_tcfg.flags |= CRYPTOCOP_DECRYPT;
+ } else {
+ ciph_tcfg.flags |= CRYPTOCOP_ENCRYPT;
+ }
+ ciph_tcfg.next = cop->tfrm_op.tfrm_cfg;
+ cop->tfrm_op.tfrm_cfg = &ciph_tcfg;
+ }
+ if (oper.do_digest){
+ struct cryptocop_transform_ctx *tc = get_transform_ctx(sess, CRYPTOCOP_IOCTL_DIGEST_TID);
+ if (!tc) {
+ DEBUG_API(printk("cryptocop_ioctl_process: no digest transform in session.\n"));
+ err = -EINVAL;
+ goto error_cleanup;
+ }
+ digest_length = tc->init.alg == cryptocop_alg_md5 ? 16 : 20;
+ digest_result = kmalloc(digest_length, GFP_KERNEL);
+ if (!digest_result) {
+ DEBUG_API(printk("cryptocop_ioctl_process: kmalloc digest_result\n"));
+ err = -EINVAL;
+ goto error_cleanup;
+ }
+ DEBUG(memset(digest_result, 0xff, digest_length));
+
+ digest_tcfg.tid = CRYPTOCOP_IOCTL_DIGEST_TID;
+ digest_tcfg.inject_ix = 0;
+ ciph_tcfg.inject_ix += digest_length;
+ if ((oper.digest_start < 0) || (oper.digest_len <= 0) || (oper.digest_start > oper.inlen) || ((oper.digest_start + oper.digest_len) > oper.inlen)){
+ DEBUG_API(printk("cryptocop_ioctl_process: bad digest length\n"));
+ err = -EINVAL;
+ goto error_cleanup;
+ }
+
+ digest_tcfg.next = cop->tfrm_op.tfrm_cfg;
+ cop->tfrm_op.tfrm_cfg = &digest_tcfg;
+ }
+ if (oper.do_csum){
+ csum_tcfg.tid = CRYPTOCOP_IOCTL_CSUM_TID;
+ csum_tcfg.inject_ix = digest_length;
+ ciph_tcfg.inject_ix += 2;
+
+ if ((oper.csum_start < 0) || (oper.csum_len <= 0) || (oper.csum_start > oper.inlen) || ((oper.csum_start + oper.csum_len) > oper.inlen)){
+ DEBUG_API(printk("cryptocop_ioctl_process: bad csum length\n"));
+ kfree(cop);
+ kfree(jc);
+ return -EINVAL;
+ }
+
+ csum_tcfg.next = cop->tfrm_op.tfrm_cfg;
+ cop->tfrm_op.tfrm_cfg = &csum_tcfg;
+ }
+
+ prev_ix = first_cfg_change_ix(&oper);
+ if (prev_ix > oper.inlen) {
+ DEBUG_API(printk("cryptocop_ioctl_process: length mismatch\n"));
+ nooutpages = noinpages = 0;
+ err = -EINVAL;
+ goto error_cleanup;
+ }
+ DEBUG(printk("cryptocop_ioctl_process: inlen=%d, cipher_outlen=%d\n", oper.inlen, oper.cipher_outlen));
+
+ /* Map user pages for in and out data of the operation. */
+ noinpages = (((unsigned long int)(oper.indata + prev_ix) & ~PAGE_MASK) + oper.inlen - 1 - prev_ix + ~PAGE_MASK) >> PAGE_SHIFT;
+ DEBUG(printk("cryptocop_ioctl_process: noinpages=%d\n", noinpages));
+ inpages = kmalloc(noinpages * sizeof(struct page*), GFP_KERNEL);
+ if (!inpages){
+ DEBUG_API(printk("cryptocop_ioctl_process: kmalloc inpages\n"));
+ nooutpages = noinpages = 0;
+ err = -ENOMEM;
+ goto error_cleanup;
+ }
+ if (oper.do_cipher){
+ nooutpages = (((unsigned long int)oper.cipher_outdata & ~PAGE_MASK) + oper.cipher_outlen - 1 + ~PAGE_MASK) >> PAGE_SHIFT;
+ DEBUG(printk("cryptocop_ioctl_process: nooutpages=%d\n", nooutpages));
+ outpages = kmalloc(nooutpages * sizeof(struct page*), GFP_KERNEL);
+ if (!outpages){
+ DEBUG_API(printk("cryptocop_ioctl_process: kmalloc outpages\n"));
+ nooutpages = noinpages = 0;
+ err = -ENOMEM;
+ goto error_cleanup;
+ }
+ }
+
+ /* Acquire the mm page semaphore. */
+ down_read(&current->mm->mmap_sem);
+
+ err = get_user_pages(current,
+ current->mm,
+ (unsigned long int)(oper.indata + prev_ix),
+ noinpages,
+ 0, /* read access only for in data */
+ 0, /* no force */
+ inpages,
+ NULL);
+
+ if (err < 0) {
+ up_read(&current->mm->mmap_sem);
+ nooutpages = noinpages = 0;
+ DEBUG_API(printk("cryptocop_ioctl_process: get_user_pages indata\n"));
+ goto error_cleanup;
+ }
+ noinpages = err;
+ if (oper.do_cipher){
+ err = get_user_pages(current,
+ current->mm,
+ (unsigned long int)oper.cipher_outdata,
+ nooutpages,
+ 1, /* write access for out data */
+ 0, /* no force */
+ outpages,
+ NULL);
+ up_read(&current->mm->mmap_sem);
+ if (err < 0) {
+ nooutpages = 0;
+ DEBUG_API(printk("cryptocop_ioctl_process: get_user_pages outdata\n"));
+ goto error_cleanup;
+ }
+ nooutpages = err;
+ } else {
+ up_read(&current->mm->mmap_sem);
+ }
+
+ /* Add 6 to nooutpages to make room for possibly inserted buffers for storing digest and
+ * csum output and splits when units are (dis-)connected. */
+ cop->tfrm_op.indata = kmalloc((noinpages) * sizeof(struct iovec), GFP_KERNEL);
+ cop->tfrm_op.outdata = kmalloc((6 + nooutpages) * sizeof(struct iovec), GFP_KERNEL);
+ if (!cop->tfrm_op.indata || !cop->tfrm_op.outdata) {
+ DEBUG_API(printk("cryptocop_ioctl_process: kmalloc iovecs\n"));
+ err = -ENOMEM;
+ goto error_cleanup;
+ }
+
+ cop->tfrm_op.inlen = oper.inlen - prev_ix;
+ cop->tfrm_op.outlen = 0;
+ if (oper.do_cipher) cop->tfrm_op.outlen += oper.cipher_outlen;
+ if (oper.do_digest) cop->tfrm_op.outlen += digest_length;
+ if (oper.do_csum) cop->tfrm_op.outlen += 2;
+
+ /* Setup the in iovecs. */
+ cop->tfrm_op.incount = noinpages;
+ if (noinpages > 1){
+ size_t tmplen = cop->tfrm_op.inlen;
+
+ cop->tfrm_op.indata[0].iov_len = PAGE_SIZE - ((unsigned long int)(oper.indata + prev_ix) & ~PAGE_MASK);
+ cop->tfrm_op.indata[0].iov_base = (unsigned char*)page_address(inpages[0]) + ((unsigned long int)(oper.indata + prev_ix) & ~PAGE_MASK);
+ tmplen -= cop->tfrm_op.indata[0].iov_len;
+ for (i = 1; i<noinpages; i++){
+ cop->tfrm_op.indata[i].iov_len = tmplen < PAGE_SIZE ? tmplen : PAGE_SIZE;
+ cop->tfrm_op.indata[i].iov_base = (unsigned char*)page_address(inpages[i]);
+ tmplen -= PAGE_SIZE;
+ }
+ } else {
+ cop->tfrm_op.indata[0].iov_len = oper.inlen - prev_ix;
+ cop->tfrm_op.indata[0].iov_base = (unsigned char*)page_address(inpages[0]) + ((unsigned long int)(oper.indata + prev_ix) & ~PAGE_MASK);
+ }
+
+ iovlen = nooutpages + 6;
+ pageoffset = oper.do_cipher ? ((unsigned long int)oper.cipher_outdata & ~PAGE_MASK) : 0;
+
+ next_ix = next_cfg_change_ix(&oper, prev_ix);
+ if (prev_ix == next_ix){
+ DEBUG_API(printk("cryptocop_ioctl_process: length configuration broken.\n"));
+ err = -EINVAL; /* This should be impossible barring bugs. */
+ goto error_cleanup;
+ }
+ while (prev_ix != next_ix){
+ end_digest = end_csum = cipher_active = digest_active = csum_active = 0;
+ descs[desc_ix].cfg = NULL;
+ descs[desc_ix].length = next_ix - prev_ix;
+
+ if (oper.do_cipher && (oper.cipher_start < next_ix) && (prev_ix < (oper.cipher_start + oper.cipher_len))) {
+ dcfgs[dcfg_ix].tid = CRYPTOCOP_IOCTL_CIPHER_TID;
+ dcfgs[dcfg_ix].src = cryptocop_source_dma;
+ cipher_active = 1;
+
+ if (next_ix == (oper.cipher_start + oper.cipher_len)){
+ cipher_done = 1;
+ dcfgs[dcfg_ix].last = 1;
+ } else {
+ dcfgs[dcfg_ix].last = 0;
+ }
+ dcfgs[dcfg_ix].next = descs[desc_ix].cfg;
+ descs[desc_ix].cfg = &dcfgs[dcfg_ix];
+ ++dcfg_ix;
+ }
+ if (oper.do_digest && (oper.digest_start < next_ix) && (prev_ix < (oper.digest_start + oper.digest_len))) {
+ digest_active = 1;
+ dcfgs[dcfg_ix].tid = CRYPTOCOP_IOCTL_DIGEST_TID;
+ dcfgs[dcfg_ix].src = cryptocop_source_dma;
+ if (next_ix == (oper.digest_start + oper.digest_len)){
+ assert(!digest_done);
+ digest_done = 1;
+ dcfgs[dcfg_ix].last = 1;
+ } else {
+ dcfgs[dcfg_ix].last = 0;
+ }
+ dcfgs[dcfg_ix].next = descs[desc_ix].cfg;
+ descs[desc_ix].cfg = &dcfgs[dcfg_ix];
+ ++dcfg_ix;
+ }
+ if (oper.do_csum && (oper.csum_start < next_ix) && (prev_ix < (oper.csum_start + oper.csum_len))){
+ csum_active = 1;
+ dcfgs[dcfg_ix].tid = CRYPTOCOP_IOCTL_CSUM_TID;
+ dcfgs[dcfg_ix].src = cryptocop_source_dma;
+ if (next_ix == (oper.csum_start + oper.csum_len)){
+ csum_done = 1;
+ dcfgs[dcfg_ix].last = 1;
+ } else {
+ dcfgs[dcfg_ix].last = 0;
+ }
+ dcfgs[dcfg_ix].next = descs[desc_ix].cfg;
+ descs[desc_ix].cfg = &dcfgs[dcfg_ix];
+ ++dcfg_ix;
+ }
+ if (!descs[desc_ix].cfg){
+ DEBUG_API(printk("cryptocop_ioctl_process: data segment %d (%d to %d) had no active transforms\n", desc_ix, prev_ix, next_ix));
+ err = -EINVAL;
+ goto error_cleanup;
+ }
+ descs[desc_ix].next = &(descs[desc_ix]) + 1;
+ ++desc_ix;
+ prev_ix = next_ix;
+ next_ix = next_cfg_change_ix(&oper, prev_ix);
+ }
+ if (desc_ix > 0){
+ descs[desc_ix-1].next = NULL;
+ } else {
+ descs[0].next = NULL;
+ }
+ if (oper.do_digest) {
+ DEBUG(printk("cryptocop_ioctl_process: mapping %d byte digest output to iovec %d\n", digest_length, iovix));
+ /* Add outdata iovec, length == <length of type of digest> */
+ cop->tfrm_op.outdata[iovix].iov_base = digest_result;
+ cop->tfrm_op.outdata[iovix].iov_len = digest_length;
+ ++iovix;
+ }
+ if (oper.do_csum) {
+ /* Add outdata iovec, length == 2, the length of csum. */
+ DEBUG(printk("cryptocop_ioctl_process: mapping 2 byte csum output to iovec %d\n", iovix));
+ /* Add outdata iovec, length == <length of type of digest> */
+ cop->tfrm_op.outdata[iovix].iov_base = csum_result;
+ cop->tfrm_op.outdata[iovix].iov_len = 2;
+ ++iovix;
+ }
+ if (oper.do_cipher) {
+ if (!map_pages_to_iovec(cop->tfrm_op.outdata, iovlen, &iovix, outpages, nooutpages, &pageix, &pageoffset, oper.cipher_outlen)){
+ DEBUG_API(printk("cryptocop_ioctl_process: failed to map pages to iovec.\n"));
+ err = -ENOSYS; /* This should be impossible barring bugs. */
+ goto error_cleanup;
+ }
+ }
+ DEBUG(printk("cryptocop_ioctl_process: setting cop->tfrm_op.outcount %d\n", iovix));
+ cop->tfrm_op.outcount = iovix;
+ assert(iovix <= (nooutpages + 6));
+
+ cop->sid = oper.ses_id;
+ cop->tfrm_op.desc = &descs[0];
+
+ DEBUG(printk("cryptocop_ioctl_process: inserting job, cb_data=0x%p\n", cop->cb_data));
+
+ if ((err = cryptocop_job_queue_insert_user_job(cop)) != 0) {
+ DEBUG_API(printk("cryptocop_ioctl_process: insert job %d\n", err));
+ err = -EINVAL;
+ goto error_cleanup;
+ }
+
+ DEBUG(printk("cryptocop_ioctl_process: begin wait for result\n"));
+
+ wait_event(cryptocop_ioc_process_wq, (jc->processed != 0));
+ DEBUG(printk("cryptocop_ioctl_process: end wait for result\n"));
+ if (!jc->processed){
+ printk(KERN_WARNING "cryptocop_ioctl_process: job not processed at completion\n");
+ err = -EIO;
+ goto error_cleanup;
+ }
+
+ /* Job process done. Cipher output should already be correct in job so no post processing of outdata. */
+ DEBUG(printk("cryptocop_ioctl_process: operation_status = %d\n", cop->operation_status));
+ if (cop->operation_status == 0){
+ if (oper.do_digest){
+ DEBUG(printk("cryptocop_ioctl_process: copy %d bytes digest to user\n", digest_length));
+ err = copy_to_user((unsigned char*)crp_oper + offsetof(struct strcop_crypto_op, digest), digest_result, digest_length);
+ if (0 != err){
+ DEBUG_API(printk("cryptocop_ioctl_process: copy_to_user, digest length %d, err %d\n", digest_length, err));
+ err = -EFAULT;
+ goto error_cleanup;
+ }
+ }
+ if (oper.do_csum){
+ DEBUG(printk("cryptocop_ioctl_process: copy 2 bytes checksum to user\n"));
+ err = copy_to_user((unsigned char*)crp_oper + offsetof(struct strcop_crypto_op, csum), csum_result, 2);
+ if (0 != err){
+ DEBUG_API(printk("cryptocop_ioctl_process: copy_to_user, csum, err %d\n", err));
+ err = -EFAULT;
+ goto error_cleanup;
+ }
+ }
+ err = 0;
+ } else {
+ DEBUG(printk("cryptocop_ioctl_process: returning err = operation_status = %d\n", cop->operation_status));
+ err = cop->operation_status;
+ }
+
+ error_cleanup:
+ /* Release page caches. */
+ for (i = 0; i < noinpages; i++){
+ put_page(inpages[i]);
+ }
+ for (i = 0; i < nooutpages; i++){
+ int spdl_err;
+ /* Mark output pages dirty. */
+ spdl_err = set_page_dirty_lock(outpages[i]);
+ DEBUG(if (spdl_err < 0)printk("cryptocop_ioctl_process: set_page_dirty_lock returned %d\n", spdl_err));
+ }
+ for (i = 0; i < nooutpages; i++){
+ put_page(outpages[i]);
+ }
+
+ kfree(digest_result);
+ kfree(inpages);
+ kfree(outpages);
+ if (cop){
+ kfree(cop->tfrm_op.indata);
+ kfree(cop->tfrm_op.outdata);
+ kfree(cop);
+ }
+ kfree(jc);
+
+ DEBUG(print_lock_status());
+
+ return err;
+}
+
+
+static int cryptocop_ioctl_create_session(struct inode *inode, struct file *filp, unsigned int cmd, unsigned long arg)
+{
+ cryptocop_session_id sid;
+ int err;
+ struct cryptocop_private *dev;
+ struct strcop_session_op *sess_op = (struct strcop_session_op *)arg;
+ struct strcop_session_op sop;
+ struct cryptocop_transform_init *tis = NULL;
+ struct cryptocop_transform_init ti_cipher = {0};
+ struct cryptocop_transform_init ti_digest = {0};
+ struct cryptocop_transform_init ti_csum = {0};
+
+ if (!access_ok(VERIFY_WRITE, sess_op, sizeof(struct strcop_session_op)))
+ return -EFAULT;
+ err = copy_from_user(&sop, sess_op, sizeof(struct strcop_session_op));
+ if (err) return -EFAULT;
+ if (sop.cipher != cryptocop_cipher_none) {
+ if (!access_ok(VERIFY_READ, sop.key, sop.keylen)) return -EFAULT;
+ }
+ DEBUG(printk("cryptocop_ioctl_create_session, sess_op:\n"));
+
+ DEBUG(printk("\tcipher:%d\n"
+ "\tcipher_mode:%d\n"
+ "\tdigest:%d\n"
+ "\tcsum:%d\n",
+ (int)sop.cipher,
+ (int)sop.cmode,
+ (int)sop.digest,
+ (int)sop.csum));
+
+ if (sop.cipher != cryptocop_cipher_none){
+ /* Init the cipher. */
+ switch (sop.cipher){
+ case cryptocop_cipher_des:
+ ti_cipher.alg = cryptocop_alg_des;
+ break;
+ case cryptocop_cipher_3des:
+ ti_cipher.alg = cryptocop_alg_3des;
+ break;
+ case cryptocop_cipher_aes:
+ ti_cipher.alg = cryptocop_alg_aes;
+ break;
+ default:
+ DEBUG_API(printk("create session, bad cipher algorithm %d\n", sop.cipher));
+ return -EINVAL;
+ };
+ DEBUG(printk("setting cipher transform %d\n", ti_cipher.alg));
+ copy_from_user(ti_cipher.key, sop.key, sop.keylen/8);
+ ti_cipher.keylen = sop.keylen;
+ switch (sop.cmode){
+ case cryptocop_cipher_mode_cbc:
+ case cryptocop_cipher_mode_ecb:
+ ti_cipher.cipher_mode = sop.cmode;
+ break;
+ default:
+ DEBUG_API(printk("create session, bad cipher mode %d\n", sop.cmode));
+ return -EINVAL;
+ }
+ DEBUG(printk("cryptocop_ioctl_create_session: setting CBC mode %d\n", ti_cipher.cipher_mode));
+ switch (sop.des3_mode){
+ case cryptocop_3des_eee:
+ case cryptocop_3des_eed:
+ case cryptocop_3des_ede:
+ case cryptocop_3des_edd:
+ case cryptocop_3des_dee:
+ case cryptocop_3des_ded:
+ case cryptocop_3des_dde:
+ case cryptocop_3des_ddd:
+ ti_cipher.tdes_mode = sop.des3_mode;
+ break;
+ default:
+ DEBUG_API(printk("create session, bad 3DES mode %d\n", sop.des3_mode));
+ return -EINVAL;
+ }
+ ti_cipher.tid = CRYPTOCOP_IOCTL_CIPHER_TID;
+ ti_cipher.next = tis;
+ tis = &ti_cipher;
+ } /* if (sop.cipher != cryptocop_cipher_none) */
+ if (sop.digest != cryptocop_digest_none){
+ DEBUG(printk("setting digest transform\n"));
+ switch (sop.digest){
+ case cryptocop_digest_md5:
+ ti_digest.alg = cryptocop_alg_md5;
+ break;
+ case cryptocop_digest_sha1:
+ ti_digest.alg = cryptocop_alg_sha1;
+ break;
+ default:
+ DEBUG_API(printk("create session, bad digest algorithm %d\n", sop.digest));
+ return -EINVAL;
+ }
+ ti_digest.tid = CRYPTOCOP_IOCTL_DIGEST_TID;
+ ti_digest.next = tis;
+ tis = &ti_digest;
+ } /* if (sop.digest != cryptocop_digest_none) */
+ if (sop.csum != cryptocop_csum_none){
+ DEBUG(printk("setting csum transform\n"));
+ switch (sop.csum){
+ case cryptocop_csum_le:
+ case cryptocop_csum_be:
+ ti_csum.csum_mode = sop.csum;
+ break;
+ default:
+ DEBUG_API(printk("create session, bad checksum algorithm %d\n", sop.csum));
+ return -EINVAL;
+ }
+ ti_csum.alg = cryptocop_alg_csum;
+ ti_csum.tid = CRYPTOCOP_IOCTL_CSUM_TID;
+ ti_csum.next = tis;
+ tis = &ti_csum;
+ } /* (sop.csum != cryptocop_csum_none) */
+ dev = kmalloc(sizeof(struct cryptocop_private), GFP_KERNEL);
+ if (!dev){
+ DEBUG_API(printk("create session, alloc dev\n"));
+ return -ENOMEM;
+ }
+
+ err = cryptocop_new_session(&sid, tis, GFP_KERNEL);
+ DEBUG({ if (err) printk("create session, cryptocop_new_session %d\n", err);});
+
+ if (err) {
+ kfree(dev);
+ return err;
+ }
+ sess_op->ses_id = sid;
+ dev->sid = sid;
+ dev->next = filp->private_data;
+ filp->private_data = dev;
+
+ return 0;
+}
+
+static long cryptocop_ioctl_unlocked(struct inode *inode,
+ struct file *filp, unsigned int cmd, unsigned long arg)
+{
+ int err = 0;
+ if (_IOC_TYPE(cmd) != ETRAXCRYPTOCOP_IOCTYPE) {
+ DEBUG_API(printk("cryptocop_ioctl: wrong type\n"));
+ return -ENOTTY;
+ }
+ if (_IOC_NR(cmd) > CRYPTOCOP_IO_MAXNR){
+ return -ENOTTY;
+ }
+ /* Access check of the argument. Some commands, e.g. create session and process op,
+ needs additional checks. Those are handled in the command handling functions. */
+ if (_IOC_DIR(cmd) & _IOC_READ)
+ err = !access_ok(VERIFY_WRITE, (void *)arg, _IOC_SIZE(cmd));
+ else if (_IOC_DIR(cmd) & _IOC_WRITE)
+ err = !access_ok(VERIFY_READ, (void *)arg, _IOC_SIZE(cmd));
+ if (err) return -EFAULT;
+
+ switch (cmd) {
+ case CRYPTOCOP_IO_CREATE_SESSION:
+ return cryptocop_ioctl_create_session(inode, filp, cmd, arg);
+ case CRYPTOCOP_IO_CLOSE_SESSION:
+ return cryptocop_ioctl_close_session(inode, filp, cmd, arg);
+ case CRYPTOCOP_IO_PROCESS_OP:
+ return cryptocop_ioctl_process(inode, filp, cmd, arg);
+ default:
+ DEBUG_API(printk("cryptocop_ioctl: unknown command\n"));
+ return -ENOTTY;
+ }
+ return 0;
+}
+
+static long
+cryptocop_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
+{
+ long ret;
+
+ mutex_lock(&cryptocop_mutex);
+ ret = cryptocop_ioctl_unlocked(file_inode(filp), filp, cmd, arg);
+ mutex_unlock(&cryptocop_mutex);
+
+ return ret;
+}
+
+
+#ifdef LDEBUG
+static void print_dma_descriptors(struct cryptocop_int_operation *iop)
+{
+ struct cryptocop_dma_desc *cdesc_out = iop->cdesc_out;
+ struct cryptocop_dma_desc *cdesc_in = iop->cdesc_in;
+ int i;
+
+ printk("print_dma_descriptors start\n");
+
+ printk("iop:\n");
+ printk("\tsid: 0x%lld\n", iop->sid);
+
+ printk("\tcdesc_out: 0x%p\n", iop->cdesc_out);
+ printk("\tcdesc_in: 0x%p\n", iop->cdesc_in);
+ printk("\tddesc_out: 0x%p\n", iop->ddesc_out);
+ printk("\tddesc_in: 0x%p\n", iop->ddesc_in);
+
+ printk("\niop->ctx_out: 0x%p phys: 0x%p\n", &iop->ctx_out, (char*)virt_to_phys(&iop->ctx_out));
+ printk("\tnext: 0x%p\n"
+ "\tsaved_data: 0x%p\n"
+ "\tsaved_data_buf: 0x%p\n",
+ iop->ctx_out.next,
+ iop->ctx_out.saved_data,
+ iop->ctx_out.saved_data_buf);
+
+ printk("\niop->ctx_in: 0x%p phys: 0x%p\n", &iop->ctx_in, (char*)virt_to_phys(&iop->ctx_in));
+ printk("\tnext: 0x%p\n"
+ "\tsaved_data: 0x%p\n"
+ "\tsaved_data_buf: 0x%p\n",
+ iop->ctx_in.next,
+ iop->ctx_in.saved_data,
+ iop->ctx_in.saved_data_buf);
+
+ i = 0;
+ while (cdesc_out) {
+ dma_descr_data *td;
+ printk("cdesc_out %d, desc=0x%p\n", i, cdesc_out->dma_descr);
+ printk("\n\tvirt_to_phys(desc): 0x%p\n", (char*)virt_to_phys(cdesc_out->dma_descr));
+ td = cdesc_out->dma_descr;
+ printk("\n\tbuf: 0x%p\n"
+ "\tafter: 0x%p\n"
+ "\tmd: 0x%04x\n"
+ "\tnext: 0x%p\n",
+ td->buf,
+ td->after,
+ td->md,
+ td->next);
+ printk("flags:\n"
+ "\twait:\t%d\n"
+ "\teol:\t%d\n"
+ "\touteop:\t%d\n"
+ "\tineop:\t%d\n"
+ "\tintr:\t%d\n",
+ td->wait,
+ td->eol,
+ td->out_eop,
+ td->in_eop,
+ td->intr);
+ cdesc_out = cdesc_out->next;
+ i++;
+ }
+ i = 0;
+ while (cdesc_in) {
+ dma_descr_data *td;
+ printk("cdesc_in %d, desc=0x%p\n", i, cdesc_in->dma_descr);
+ printk("\n\tvirt_to_phys(desc): 0x%p\n", (char*)virt_to_phys(cdesc_in->dma_descr));
+ td = cdesc_in->dma_descr;
+ printk("\n\tbuf: 0x%p\n"
+ "\tafter: 0x%p\n"
+ "\tmd: 0x%04x\n"
+ "\tnext: 0x%p\n",
+ td->buf,
+ td->after,
+ td->md,
+ td->next);
+ printk("flags:\n"
+ "\twait:\t%d\n"
+ "\teol:\t%d\n"
+ "\touteop:\t%d\n"
+ "\tineop:\t%d\n"
+ "\tintr:\t%d\n",
+ td->wait,
+ td->eol,
+ td->out_eop,
+ td->in_eop,
+ td->intr);
+ cdesc_in = cdesc_in->next;
+ i++;
+ }
+
+ printk("print_dma_descriptors end\n");
+}
+
+
+static void print_strcop_crypto_op(struct strcop_crypto_op *cop)
+{
+ printk("print_strcop_crypto_op, 0x%p\n", cop);
+
+ /* Indata. */
+ printk("indata=0x%p\n"
+ "inlen=%d\n"
+ "do_cipher=%d\n"
+ "decrypt=%d\n"
+ "cipher_explicit=%d\n"
+ "cipher_start=%d\n"
+ "cipher_len=%d\n"
+ "outdata=0x%p\n"
+ "outlen=%d\n",
+ cop->indata,
+ cop->inlen,
+ cop->do_cipher,
+ cop->decrypt,
+ cop->cipher_explicit,
+ cop->cipher_start,
+ cop->cipher_len,
+ cop->cipher_outdata,
+ cop->cipher_outlen);
+
+ printk("do_digest=%d\n"
+ "digest_start=%d\n"
+ "digest_len=%d\n",
+ cop->do_digest,
+ cop->digest_start,
+ cop->digest_len);
+
+ printk("do_csum=%d\n"
+ "csum_start=%d\n"
+ "csum_len=%d\n",
+ cop->do_csum,
+ cop->csum_start,
+ cop->csum_len);
+}
+
+static void print_cryptocop_operation(struct cryptocop_operation *cop)
+{
+ struct cryptocop_desc *d;
+ struct cryptocop_tfrm_cfg *tc;
+ struct cryptocop_desc_cfg *dc;
+ int i;
+
+ printk("print_cryptocop_operation, cop=0x%p\n\n", cop);
+ printk("sid: %lld\n", cop->sid);
+ printk("operation_status=%d\n"
+ "use_dmalists=%d\n"
+ "in_interrupt=%d\n"
+ "fast_callback=%d\n",
+ cop->operation_status,
+ cop->use_dmalists,
+ cop->in_interrupt,
+ cop->fast_callback);
+
+ if (cop->use_dmalists){
+ print_user_dma_lists(&cop->list_op);
+ } else {
+ printk("cop->tfrm_op\n"
+ "tfrm_cfg=0x%p\n"
+ "desc=0x%p\n"
+ "indata=0x%p\n"
+ "incount=%d\n"
+ "inlen=%d\n"
+ "outdata=0x%p\n"
+ "outcount=%d\n"
+ "outlen=%d\n\n",
+ cop->tfrm_op.tfrm_cfg,
+ cop->tfrm_op.desc,
+ cop->tfrm_op.indata,
+ cop->tfrm_op.incount,
+ cop->tfrm_op.inlen,
+ cop->tfrm_op.outdata,
+ cop->tfrm_op.outcount,
+ cop->tfrm_op.outlen);
+
+ tc = cop->tfrm_op.tfrm_cfg;
+ while (tc){
+ printk("tfrm_cfg, 0x%p\n"
+ "tid=%d\n"
+ "flags=%d\n"
+ "inject_ix=%d\n"
+ "next=0x%p\n",
+ tc,
+ tc->tid,
+ tc->flags,
+ tc->inject_ix,
+ tc->next);
+ tc = tc->next;
+ }
+ d = cop->tfrm_op.desc;
+ while (d){
+ printk("\n======================desc, 0x%p\n"
+ "length=%d\n"
+ "cfg=0x%p\n"
+ "next=0x%p\n",
+ d,
+ d->length,
+ d->cfg,
+ d->next);
+ dc = d->cfg;
+ while (dc){
+ printk("=========desc_cfg, 0x%p\n"
+ "tid=%d\n"
+ "src=%d\n"
+ "last=%d\n"
+ "next=0x%p\n",
+ dc,
+ dc->tid,
+ dc->src,
+ dc->last,
+ dc->next);
+ dc = dc->next;
+ }
+ d = d->next;
+ }
+ printk("\n====iniov\n");
+ for (i = 0; i < cop->tfrm_op.incount; i++){
+ printk("indata[%d]\n"
+ "base=0x%p\n"
+ "len=%d\n",
+ i,
+ cop->tfrm_op.indata[i].iov_base,
+ cop->tfrm_op.indata[i].iov_len);
+ }
+ printk("\n====outiov\n");
+ for (i = 0; i < cop->tfrm_op.outcount; i++){
+ printk("outdata[%d]\n"
+ "base=0x%p\n"
+ "len=%d\n",
+ i,
+ cop->tfrm_op.outdata[i].iov_base,
+ cop->tfrm_op.outdata[i].iov_len);
+ }
+ }
+ printk("------------end print_cryptocop_operation\n");
+}
+
+
+static void print_user_dma_lists(struct cryptocop_dma_list_operation *dma_op)
+{
+ dma_descr_data *dd;
+ int i;
+
+ printk("print_user_dma_lists, dma_op=0x%p\n", dma_op);
+
+ printk("out_data_buf = 0x%p, phys_to_virt(out_data_buf) = 0x%p\n", dma_op->out_data_buf, phys_to_virt((unsigned long int)dma_op->out_data_buf));
+ printk("in_data_buf = 0x%p, phys_to_virt(in_data_buf) = 0x%p\n", dma_op->in_data_buf, phys_to_virt((unsigned long int)dma_op->in_data_buf));
+
+ printk("##############outlist\n");
+ dd = phys_to_virt((unsigned long int)dma_op->outlist);
+ i = 0;
+ while (dd != NULL) {
+ printk("#%d phys_to_virt(desc) 0x%p\n", i, dd);
+ printk("\n\tbuf: 0x%p\n"
+ "\tafter: 0x%p\n"
+ "\tmd: 0x%04x\n"
+ "\tnext: 0x%p\n",
+ dd->buf,
+ dd->after,
+ dd->md,
+ dd->next);
+ printk("flags:\n"
+ "\twait:\t%d\n"
+ "\teol:\t%d\n"
+ "\touteop:\t%d\n"
+ "\tineop:\t%d\n"
+ "\tintr:\t%d\n",
+ dd->wait,
+ dd->eol,
+ dd->out_eop,
+ dd->in_eop,
+ dd->intr);
+ if (dd->eol)
+ dd = NULL;
+ else
+ dd = phys_to_virt((unsigned long int)dd->next);
+ ++i;
+ }
+
+ printk("##############inlist\n");
+ dd = phys_to_virt((unsigned long int)dma_op->inlist);
+ i = 0;
+ while (dd != NULL) {
+ printk("#%d phys_to_virt(desc) 0x%p\n", i, dd);
+ printk("\n\tbuf: 0x%p\n"
+ "\tafter: 0x%p\n"
+ "\tmd: 0x%04x\n"
+ "\tnext: 0x%p\n",
+ dd->buf,
+ dd->after,
+ dd->md,
+ dd->next);
+ printk("flags:\n"
+ "\twait:\t%d\n"
+ "\teol:\t%d\n"
+ "\touteop:\t%d\n"
+ "\tineop:\t%d\n"
+ "\tintr:\t%d\n",
+ dd->wait,
+ dd->eol,
+ dd->out_eop,
+ dd->in_eop,
+ dd->intr);
+ if (dd->eol)
+ dd = NULL;
+ else
+ dd = phys_to_virt((unsigned long int)dd->next);
+ ++i;
+ }
+}
+
+
+static void print_lock_status(void)
+{
+ printk("**********************print_lock_status\n");
+ printk("cryptocop_completed_jobs_lock %d\n", spin_is_locked(&cryptocop_completed_jobs_lock));
+ printk("cryptocop_job_queue_lock %d\n", spin_is_locked(&cryptocop_job_queue_lock));
+ printk("descr_pool_lock %d\n", spin_is_locked(&descr_pool_lock));
+ printk("cryptocop_sessions_lock %d\n", spin_is_locked(cryptocop_sessions_lock));
+ printk("running_job_lock %d\n", spin_is_locked(running_job_lock));
+ printk("cryptocop_process_lock %d\n", spin_is_locked(cryptocop_process_lock));
+}
+#endif /* LDEBUG */
+
+
+static const char cryptocop_name[] = "ETRAX FS stream co-processor";
+
+static int init_stream_coprocessor(void)
+{
+ int err;
+ int i;
+ static int initialized = 0;
+
+ if (initialized)
+ return 0;
+
+ initialized = 1;
+
+ printk("ETRAX FS stream co-processor driver v0.01, (c) 2003 Axis Communications AB\n");
+
+ err = register_chrdev(CRYPTOCOP_MAJOR, cryptocop_name, &cryptocop_fops);
+ if (err < 0) {
+ printk(KERN_ERR "stream co-processor: could not get major number.\n");
+ return err;
+ }
+
+ err = init_cryptocop();
+ if (err) {
+ (void)unregister_chrdev(CRYPTOCOP_MAJOR, cryptocop_name);
+ return err;
+ }
+ err = cryptocop_job_queue_init();
+ if (err) {
+ release_cryptocop();
+ (void)unregister_chrdev(CRYPTOCOP_MAJOR, cryptocop_name);
+ return err;
+ }
+ /* Init the descriptor pool. */
+ for (i = 0; i < CRYPTOCOP_DESCRIPTOR_POOL_SIZE - 1; i++) {
+ descr_pool[i].from_pool = 1;
+ descr_pool[i].next = &descr_pool[i + 1];
+ }
+ descr_pool[i].from_pool = 1;
+ descr_pool[i].next = NULL;
+ descr_pool_free_list = &descr_pool[0];
+ descr_pool_no_free = CRYPTOCOP_DESCRIPTOR_POOL_SIZE;
+
+ spin_lock_init(&cryptocop_completed_jobs_lock);
+ spin_lock_init(&cryptocop_job_queue_lock);
+ spin_lock_init(&descr_pool_lock);
+ spin_lock_init(&cryptocop_sessions_lock);
+ spin_lock_init(&running_job_lock);
+ spin_lock_init(&cryptocop_process_lock);
+
+ cryptocop_sessions = NULL;
+ next_sid = 1;
+
+ cryptocop_running_job = NULL;
+
+ printk("stream co-processor: init done.\n");
+ return 0;
+}
+
+static void __exit exit_stream_coprocessor(void)
+{
+ release_cryptocop();
+ cryptocop_job_queue_close();
+}
+
+module_init(init_stream_coprocessor);
+module_exit(exit_stream_coprocessor);
+
diff --git a/kernel/arch/cris/arch-v32/drivers/i2c.c b/kernel/arch/cris/arch-v32/drivers/i2c.c
new file mode 100644
index 000000000..3b2c82ce8
--- /dev/null
+++ b/kernel/arch/cris/arch-v32/drivers/i2c.c
@@ -0,0 +1,751 @@
+/*!***************************************************************************
+*!
+*! FILE NAME : i2c.c
+*!
+*! DESCRIPTION: implements an interface for IIC/I2C, both directly from other
+*! kernel modules (i2c_writereg/readreg) and from userspace using
+*! ioctl()'s
+*!
+*! Nov 30 1998 Torbjorn Eliasson Initial version.
+*! Bjorn Wesen Elinux kernel version.
+*! Jan 14 2000 Johan Adolfsson Fixed PB shadow register stuff -
+*! don't use PB_I2C if DS1302 uses same bits,
+*! use PB.
+*| June 23 2003 Pieter Grimmerink Added 'i2c_sendnack'. i2c_readreg now
+*| generates nack on last received byte,
+*| instead of ack.
+*| i2c_getack changed data level while clock
+*| was high, causing DS75 to see a stop condition
+*!
+*! ---------------------------------------------------------------------------
+*!
+*! (C) Copyright 1999-2007 Axis Communications AB, LUND, SWEDEN
+*!
+*!***************************************************************************/
+
+/****************** INCLUDE FILES SECTION ***********************************/
+
+#include <linux/module.h>
+#include <linux/sched.h>
+#include <linux/errno.h>
+#include <linux/kernel.h>
+#include <linux/fs.h>
+#include <linux/string.h>
+#include <linux/init.h>
+#include <linux/mutex.h>
+
+#include <asm/etraxi2c.h>
+
+#include <asm/io.h>
+#include <asm/delay.h>
+
+#include "i2c.h"
+
+/****************** I2C DEFINITION SECTION *************************/
+
+#define D(x)
+
+#define I2C_MAJOR 123 /* LOCAL/EXPERIMENTAL */
+static DEFINE_MUTEX(i2c_mutex);
+static const char i2c_name[] = "i2c";
+
+#define CLOCK_LOW_TIME 8
+#define CLOCK_HIGH_TIME 8
+#define START_CONDITION_HOLD_TIME 8
+#define STOP_CONDITION_HOLD_TIME 8
+#define ENABLE_OUTPUT 0x01
+#define ENABLE_INPUT 0x00
+#define I2C_CLOCK_HIGH 1
+#define I2C_CLOCK_LOW 0
+#define I2C_DATA_HIGH 1
+#define I2C_DATA_LOW 0
+
+#define i2c_enable()
+#define i2c_disable()
+
+/* enable or disable output-enable, to select output or input on the i2c bus */
+
+#define i2c_dir_out() crisv32_io_set_dir(&cris_i2c_data, crisv32_io_dir_out)
+#define i2c_dir_in() crisv32_io_set_dir(&cris_i2c_data, crisv32_io_dir_in)
+
+/* control the i2c clock and data signals */
+
+#define i2c_clk(x) crisv32_io_set(&cris_i2c_clk, x)
+#define i2c_data(x) crisv32_io_set(&cris_i2c_data, x)
+
+/* read a bit from the i2c interface */
+
+#define i2c_getbit() crisv32_io_rd(&cris_i2c_data)
+
+#define i2c_delay(usecs) udelay(usecs)
+
+static DEFINE_SPINLOCK(i2c_lock); /* Protect directions etc */
+
+/****************** VARIABLE SECTION ************************************/
+
+static struct crisv32_iopin cris_i2c_clk;
+static struct crisv32_iopin cris_i2c_data;
+
+/****************** FUNCTION DEFINITION SECTION *************************/
+
+
+/* generate i2c start condition */
+
+void
+i2c_start(void)
+{
+ /*
+ * SCL=1 SDA=1
+ */
+ i2c_dir_out();
+ i2c_delay(CLOCK_HIGH_TIME/6);
+ i2c_data(I2C_DATA_HIGH);
+ i2c_clk(I2C_CLOCK_HIGH);
+ i2c_delay(CLOCK_HIGH_TIME);
+ /*
+ * SCL=1 SDA=0
+ */
+ i2c_data(I2C_DATA_LOW);
+ i2c_delay(START_CONDITION_HOLD_TIME);
+ /*
+ * SCL=0 SDA=0
+ */
+ i2c_clk(I2C_CLOCK_LOW);
+ i2c_delay(CLOCK_LOW_TIME);
+}
+
+/* generate i2c stop condition */
+
+void
+i2c_stop(void)
+{
+ i2c_dir_out();
+
+ /*
+ * SCL=0 SDA=0
+ */
+ i2c_clk(I2C_CLOCK_LOW);
+ i2c_data(I2C_DATA_LOW);
+ i2c_delay(CLOCK_LOW_TIME*2);
+ /*
+ * SCL=1 SDA=0
+ */
+ i2c_clk(I2C_CLOCK_HIGH);
+ i2c_delay(CLOCK_HIGH_TIME*2);
+ /*
+ * SCL=1 SDA=1
+ */
+ i2c_data(I2C_DATA_HIGH);
+ i2c_delay(STOP_CONDITION_HOLD_TIME);
+
+ i2c_dir_in();
+}
+
+/* write a byte to the i2c interface */
+
+void
+i2c_outbyte(unsigned char x)
+{
+ int i;
+
+ i2c_dir_out();
+
+ for (i = 0; i < 8; i++) {
+ if (x & 0x80) {
+ i2c_data(I2C_DATA_HIGH);
+ } else {
+ i2c_data(I2C_DATA_LOW);
+ }
+
+ i2c_delay(CLOCK_LOW_TIME/2);
+ i2c_clk(I2C_CLOCK_HIGH);
+ i2c_delay(CLOCK_HIGH_TIME);
+ i2c_clk(I2C_CLOCK_LOW);
+ i2c_delay(CLOCK_LOW_TIME/2);
+ x <<= 1;
+ }
+ i2c_data(I2C_DATA_LOW);
+ i2c_delay(CLOCK_LOW_TIME/2);
+
+ /*
+ * enable input
+ */
+ i2c_dir_in();
+}
+
+/* read a byte from the i2c interface */
+
+unsigned char
+i2c_inbyte(void)
+{
+ unsigned char aBitByte = 0;
+ int i;
+
+ /* Switch off I2C to get bit */
+ i2c_disable();
+ i2c_dir_in();
+ i2c_delay(CLOCK_HIGH_TIME/2);
+
+ /* Get bit */
+ aBitByte |= i2c_getbit();
+
+ /* Enable I2C */
+ i2c_enable();
+ i2c_delay(CLOCK_LOW_TIME/2);
+
+ for (i = 1; i < 8; i++) {
+ aBitByte <<= 1;
+ /* Clock pulse */
+ i2c_clk(I2C_CLOCK_HIGH);
+ i2c_delay(CLOCK_HIGH_TIME);
+ i2c_clk(I2C_CLOCK_LOW);
+ i2c_delay(CLOCK_LOW_TIME);
+
+ /* Switch off I2C to get bit */
+ i2c_disable();
+ i2c_dir_in();
+ i2c_delay(CLOCK_HIGH_TIME/2);
+
+ /* Get bit */
+ aBitByte |= i2c_getbit();
+
+ /* Enable I2C */
+ i2c_enable();
+ i2c_delay(CLOCK_LOW_TIME/2);
+ }
+ i2c_clk(I2C_CLOCK_HIGH);
+ i2c_delay(CLOCK_HIGH_TIME);
+
+ /*
+ * we leave the clock low, getbyte is usually followed
+ * by sendack/nack, they assume the clock to be low
+ */
+ i2c_clk(I2C_CLOCK_LOW);
+ return aBitByte;
+}
+
+/*#---------------------------------------------------------------------------
+*#
+*# FUNCTION NAME: i2c_getack
+*#
+*# DESCRIPTION : checks if ack was received from ic2
+*#
+*#--------------------------------------------------------------------------*/
+
+int
+i2c_getack(void)
+{
+ int ack = 1;
+ /*
+ * enable output
+ */
+ i2c_dir_out();
+ /*
+ * Release data bus by setting
+ * data high
+ */
+ i2c_data(I2C_DATA_HIGH);
+ /*
+ * enable input
+ */
+ i2c_dir_in();
+ i2c_delay(CLOCK_HIGH_TIME/4);
+ /*
+ * generate ACK clock pulse
+ */
+ i2c_clk(I2C_CLOCK_HIGH);
+#if 0
+ /*
+ * Use PORT PB instead of I2C
+ * for input. (I2C not working)
+ */
+ i2c_clk(1);
+ i2c_data(1);
+ /*
+ * switch off I2C
+ */
+ i2c_data(1);
+ i2c_disable();
+ i2c_dir_in();
+#endif
+
+ /*
+ * now wait for ack
+ */
+ i2c_delay(CLOCK_HIGH_TIME/2);
+ /*
+ * check for ack
+ */
+ if (i2c_getbit())
+ ack = 0;
+ i2c_delay(CLOCK_HIGH_TIME/2);
+ if (!ack) {
+ if (!i2c_getbit()) /* receiver pulld SDA low */
+ ack = 1;
+ i2c_delay(CLOCK_HIGH_TIME/2);
+ }
+
+ /*
+ * our clock is high now, make sure data is low
+ * before we enable our output. If we keep data high
+ * and enable output, we would generate a stop condition.
+ */
+#if 0
+ i2c_data(I2C_DATA_LOW);
+
+ /*
+ * end clock pulse
+ */
+ i2c_enable();
+ i2c_dir_out();
+#endif
+ i2c_clk(I2C_CLOCK_LOW);
+ i2c_delay(CLOCK_HIGH_TIME/4);
+ /*
+ * enable output
+ */
+ i2c_dir_out();
+ /*
+ * remove ACK clock pulse
+ */
+ i2c_data(I2C_DATA_HIGH);
+ i2c_delay(CLOCK_LOW_TIME/2);
+ return ack;
+}
+
+/*#---------------------------------------------------------------------------
+*#
+*# FUNCTION NAME: I2C::sendAck
+*#
+*# DESCRIPTION : Send ACK on received data
+*#
+*#--------------------------------------------------------------------------*/
+void
+i2c_sendack(void)
+{
+ /*
+ * enable output
+ */
+ i2c_delay(CLOCK_LOW_TIME);
+ i2c_dir_out();
+ /*
+ * set ack pulse high
+ */
+ i2c_data(I2C_DATA_LOW);
+ /*
+ * generate clock pulse
+ */
+ i2c_delay(CLOCK_HIGH_TIME/6);
+ i2c_clk(I2C_CLOCK_HIGH);
+ i2c_delay(CLOCK_HIGH_TIME);
+ i2c_clk(I2C_CLOCK_LOW);
+ i2c_delay(CLOCK_LOW_TIME/6);
+ /*
+ * reset data out
+ */
+ i2c_data(I2C_DATA_HIGH);
+ i2c_delay(CLOCK_LOW_TIME);
+
+ i2c_dir_in();
+}
+
+/*#---------------------------------------------------------------------------
+*#
+*# FUNCTION NAME: i2c_sendnack
+*#
+*# DESCRIPTION : Sends NACK on received data
+*#
+*#--------------------------------------------------------------------------*/
+void
+i2c_sendnack(void)
+{
+ /*
+ * enable output
+ */
+ i2c_delay(CLOCK_LOW_TIME);
+ i2c_dir_out();
+ /*
+ * set data high
+ */
+ i2c_data(I2C_DATA_HIGH);
+ /*
+ * generate clock pulse
+ */
+ i2c_delay(CLOCK_HIGH_TIME/6);
+ i2c_clk(I2C_CLOCK_HIGH);
+ i2c_delay(CLOCK_HIGH_TIME);
+ i2c_clk(I2C_CLOCK_LOW);
+ i2c_delay(CLOCK_LOW_TIME);
+
+ i2c_dir_in();
+}
+
+/*#---------------------------------------------------------------------------
+*#
+*# FUNCTION NAME: i2c_write
+*#
+*# DESCRIPTION : Writes a value to an I2C device
+*#
+*#--------------------------------------------------------------------------*/
+int
+i2c_write(unsigned char theSlave, void *data, size_t nbytes)
+{
+ int error, cntr = 3;
+ unsigned char bytes_wrote = 0;
+ unsigned char value;
+ unsigned long flags;
+
+ spin_lock_irqsave(&i2c_lock, flags);
+
+ do {
+ error = 0;
+
+ i2c_start();
+ /*
+ * send slave address
+ */
+ i2c_outbyte((theSlave & 0xfe));
+ /*
+ * wait for ack
+ */
+ if (!i2c_getack())
+ error = 1;
+ /*
+ * send data
+ */
+ for (bytes_wrote = 0; bytes_wrote < nbytes; bytes_wrote++) {
+ memcpy(&value, data + bytes_wrote, sizeof value);
+ i2c_outbyte(value);
+ /*
+ * now it's time to wait for ack
+ */
+ if (!i2c_getack())
+ error |= 4;
+ }
+ /*
+ * end byte stream
+ */
+ i2c_stop();
+
+ } while (error && cntr--);
+
+ i2c_delay(CLOCK_LOW_TIME);
+
+ spin_unlock_irqrestore(&i2c_lock, flags);
+
+ return -error;
+}
+
+/*#---------------------------------------------------------------------------
+*#
+*# FUNCTION NAME: i2c_read
+*#
+*# DESCRIPTION : Reads a value from an I2C device
+*#
+*#--------------------------------------------------------------------------*/
+int
+i2c_read(unsigned char theSlave, void *data, size_t nbytes)
+{
+ unsigned char b = 0;
+ unsigned char bytes_read = 0;
+ int error, cntr = 3;
+ unsigned long flags;
+
+ spin_lock_irqsave(&i2c_lock, flags);
+
+ do {
+ error = 0;
+ memset(data, 0, nbytes);
+ /*
+ * generate start condition
+ */
+ i2c_start();
+ /*
+ * send slave address
+ */
+ i2c_outbyte((theSlave | 0x01));
+ /*
+ * wait for ack
+ */
+ if (!i2c_getack())
+ error = 1;
+ /*
+ * fetch data
+ */
+ for (bytes_read = 0; bytes_read < nbytes; bytes_read++) {
+ b = i2c_inbyte();
+ memcpy(data + bytes_read, &b, sizeof b);
+
+ if (bytes_read < (nbytes - 1))
+ i2c_sendack();
+ }
+ /*
+ * last received byte needs to be nacked
+ * instead of acked
+ */
+ i2c_sendnack();
+ /*
+ * end sequence
+ */
+ i2c_stop();
+ } while (error && cntr--);
+
+ spin_unlock_irqrestore(&i2c_lock, flags);
+
+ return -error;
+}
+
+/*#---------------------------------------------------------------------------
+*#
+*# FUNCTION NAME: i2c_writereg
+*#
+*# DESCRIPTION : Writes a value to an I2C device
+*#
+*#--------------------------------------------------------------------------*/
+int
+i2c_writereg(unsigned char theSlave, unsigned char theReg,
+ unsigned char theValue)
+{
+ int error, cntr = 3;
+ unsigned long flags;
+
+ spin_lock_irqsave(&i2c_lock, flags);
+
+ do {
+ error = 0;
+
+ i2c_start();
+ /*
+ * send slave address
+ */
+ i2c_outbyte((theSlave & 0xfe));
+ /*
+ * wait for ack
+ */
+ if(!i2c_getack())
+ error = 1;
+ /*
+ * now select register
+ */
+ i2c_dir_out();
+ i2c_outbyte(theReg);
+ /*
+ * now it's time to wait for ack
+ */
+ if(!i2c_getack())
+ error |= 2;
+ /*
+ * send register register data
+ */
+ i2c_outbyte(theValue);
+ /*
+ * now it's time to wait for ack
+ */
+ if(!i2c_getack())
+ error |= 4;
+ /*
+ * end byte stream
+ */
+ i2c_stop();
+ } while(error && cntr--);
+
+ i2c_delay(CLOCK_LOW_TIME);
+
+ spin_unlock_irqrestore(&i2c_lock, flags);
+
+ return -error;
+}
+
+/*#---------------------------------------------------------------------------
+*#
+*# FUNCTION NAME: i2c_readreg
+*#
+*# DESCRIPTION : Reads a value from the decoder registers.
+*#
+*#--------------------------------------------------------------------------*/
+unsigned char
+i2c_readreg(unsigned char theSlave, unsigned char theReg)
+{
+ unsigned char b = 0;
+ int error, cntr = 3;
+ unsigned long flags;
+
+ spin_lock_irqsave(&i2c_lock, flags);
+
+ do {
+ error = 0;
+ /*
+ * generate start condition
+ */
+ i2c_start();
+
+ /*
+ * send slave address
+ */
+ i2c_outbyte((theSlave & 0xfe));
+ /*
+ * wait for ack
+ */
+ if(!i2c_getack())
+ error = 1;
+ /*
+ * now select register
+ */
+ i2c_dir_out();
+ i2c_outbyte(theReg);
+ /*
+ * now it's time to wait for ack
+ */
+ if(!i2c_getack())
+ error |= 2;
+ /*
+ * repeat start condition
+ */
+ i2c_delay(CLOCK_LOW_TIME);
+ i2c_start();
+ /*
+ * send slave address
+ */
+ i2c_outbyte(theSlave | 0x01);
+ /*
+ * wait for ack
+ */
+ if(!i2c_getack())
+ error |= 4;
+ /*
+ * fetch register
+ */
+ b = i2c_inbyte();
+ /*
+ * last received byte needs to be nacked
+ * instead of acked
+ */
+ i2c_sendnack();
+ /*
+ * end sequence
+ */
+ i2c_stop();
+
+ } while(error && cntr--);
+
+ spin_unlock_irqrestore(&i2c_lock, flags);
+
+ return b;
+}
+
+static int
+i2c_open(struct inode *inode, struct file *filp)
+{
+ return 0;
+}
+
+static int
+i2c_release(struct inode *inode, struct file *filp)
+{
+ return 0;
+}
+
+/* Main device API. ioctl's to write or read to/from i2c registers.
+ */
+
+static long
+i2c_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
+{
+ int ret;
+ if(_IOC_TYPE(cmd) != ETRAXI2C_IOCTYPE) {
+ return -ENOTTY;
+ }
+
+ switch (_IOC_NR(cmd)) {
+ case I2C_WRITEREG:
+ /* write to an i2c slave */
+ D(printk("i2cw %d %d %d\n",
+ I2C_ARGSLAVE(arg),
+ I2C_ARGREG(arg),
+ I2C_ARGVALUE(arg)));
+
+ mutex_lock(&i2c_mutex);
+ ret = i2c_writereg(I2C_ARGSLAVE(arg),
+ I2C_ARGREG(arg),
+ I2C_ARGVALUE(arg));
+ mutex_unlock(&i2c_mutex);
+ return ret;
+
+ case I2C_READREG:
+ {
+ unsigned char val;
+ /* read from an i2c slave */
+ D(printk("i2cr %d %d ",
+ I2C_ARGSLAVE(arg),
+ I2C_ARGREG(arg)));
+ mutex_lock(&i2c_mutex);
+ val = i2c_readreg(I2C_ARGSLAVE(arg), I2C_ARGREG(arg));
+ mutex_unlock(&i2c_mutex);
+ D(printk("= %d\n", val));
+ return val;
+ }
+ default:
+ return -EINVAL;
+
+ }
+
+ return 0;
+}
+
+static const struct file_operations i2c_fops = {
+ .owner = THIS_MODULE,
+ .unlocked_ioctl = i2c_ioctl,
+ .open = i2c_open,
+ .release = i2c_release,
+ .llseek = noop_llseek,
+};
+
+static int __init i2c_init(void)
+{
+ static int res;
+ static int first = 1;
+
+ if (!first)
+ return res;
+
+ first = 0;
+
+ /* Setup and enable the DATA and CLK pins */
+
+ res = crisv32_io_get_name(&cris_i2c_data,
+ CONFIG_ETRAX_V32_I2C_DATA_PORT);
+ if (res < 0)
+ return res;
+
+ res = crisv32_io_get_name(&cris_i2c_clk, CONFIG_ETRAX_V32_I2C_CLK_PORT);
+ crisv32_io_set_dir(&cris_i2c_clk, crisv32_io_dir_out);
+
+ return res;
+}
+
+
+static int __init i2c_register(void)
+{
+ int res;
+
+ res = i2c_init();
+ if (res < 0)
+ return res;
+
+ /* register char device */
+
+ res = register_chrdev(I2C_MAJOR, i2c_name, &i2c_fops);
+ if (res < 0) {
+ printk(KERN_ERR "i2c: couldn't get a major number.\n");
+ return res;
+ }
+
+ printk(KERN_INFO
+ "I2C driver v2.2, (c) 1999-2007 Axis Communications AB\n");
+
+ return 0;
+}
+/* this makes sure that i2c_init is called during boot */
+module_init(i2c_register);
+
+/****************** END OF FILE i2c.c ********************************/
diff --git a/kernel/arch/cris/arch-v32/drivers/i2c.h b/kernel/arch/cris/arch-v32/drivers/i2c.h
new file mode 100644
index 000000000..d9cc856f8
--- /dev/null
+++ b/kernel/arch/cris/arch-v32/drivers/i2c.h
@@ -0,0 +1,16 @@
+
+#include <linux/init.h>
+
+/* High level I2C actions */
+int i2c_write(unsigned char theSlave, void *data, size_t nbytes);
+int i2c_read(unsigned char theSlave, void *data, size_t nbytes);
+int i2c_writereg(unsigned char theSlave, unsigned char theReg, unsigned char theValue);
+unsigned char i2c_readreg(unsigned char theSlave, unsigned char theReg);
+
+/* Low level I2C */
+void i2c_start(void);
+void i2c_stop(void);
+void i2c_outbyte(unsigned char x);
+unsigned char i2c_inbyte(void);
+int i2c_getack(void);
+void i2c_sendack(void);
diff --git a/kernel/arch/cris/arch-v32/drivers/iop_fw_load.c b/kernel/arch/cris/arch-v32/drivers/iop_fw_load.c
new file mode 100644
index 000000000..2f8ea0f7a
--- /dev/null
+++ b/kernel/arch/cris/arch-v32/drivers/iop_fw_load.c
@@ -0,0 +1,230 @@
+/*
+ * Firmware loader for ETRAX FS IO-Processor
+ *
+ * Copyright (C) 2004 Axis Communications AB
+ */
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/device.h>
+#include <linux/firmware.h>
+
+#include <hwregs/reg_rdwr.h>
+#include <hwregs/reg_map.h>
+#include <hwregs/iop/iop_reg_space.h>
+#include <hwregs/iop/iop_mpu_macros.h>
+#include <hwregs/iop/iop_mpu_defs.h>
+#include <hwregs/iop/iop_spu_defs.h>
+#include <hwregs/iop/iop_sw_cpu_defs.h>
+
+#define IOP_TIMEOUT 100
+
+#error "This driver is broken with regard to its driver core usage."
+#error "Please contact <greg@kroah.com> for details on how to fix it properly."
+
+static struct device iop_spu_device[2] = {
+ { .init_name = "iop-spu0", },
+ { .init_name = "iop-spu1", },
+};
+
+static struct device iop_mpu_device = {
+ .init_name = "iop-mpu",
+};
+
+static int wait_mpu_idle(void)
+{
+ reg_iop_mpu_r_stat mpu_stat;
+ unsigned int timeout = IOP_TIMEOUT;
+
+ do {
+ mpu_stat = REG_RD(iop_mpu, regi_iop_mpu, r_stat);
+ } while (mpu_stat.instr_reg_busy == regk_iop_mpu_yes && --timeout > 0);
+ if (timeout == 0) {
+ printk(KERN_ERR "Timeout waiting for MPU to be idle\n");
+ return -EBUSY;
+ }
+ return 0;
+}
+
+int iop_fw_load_spu(const unsigned char *fw_name, unsigned int spu_inst)
+{
+ reg_iop_sw_cpu_rw_mc_ctrl mc_ctrl = {
+ .wr_spu0_mem = regk_iop_sw_cpu_no,
+ .wr_spu1_mem = regk_iop_sw_cpu_no,
+ .size = 4,
+ .cmd = regk_iop_sw_cpu_reg_copy,
+ .keep_owner = regk_iop_sw_cpu_yes
+ };
+ reg_iop_spu_rw_ctrl spu_ctrl = {
+ .en = regk_iop_spu_no,
+ .fsm = regk_iop_spu_no,
+ };
+ reg_iop_sw_cpu_r_mc_stat mc_stat;
+ const struct firmware *fw_entry;
+ u32 *data;
+ unsigned int timeout;
+ int retval, i;
+
+ if (spu_inst > 1)
+ return -ENODEV;
+
+ /* get firmware */
+ retval = request_firmware(&fw_entry,
+ fw_name,
+ &iop_spu_device[spu_inst]);
+ if (retval != 0)
+ {
+ printk(KERN_ERR
+ "iop_load_spu: Failed to load firmware \"%s\"\n",
+ fw_name);
+ return retval;
+ }
+ data = (u32 *) fw_entry->data;
+
+ /* acquire ownership of memory controller */
+ switch (spu_inst) {
+ case 0:
+ mc_ctrl.wr_spu0_mem = regk_iop_sw_cpu_yes;
+ REG_WR(iop_spu, regi_iop_spu0, rw_ctrl, spu_ctrl);
+ break;
+ case 1:
+ mc_ctrl.wr_spu1_mem = regk_iop_sw_cpu_yes;
+ REG_WR(iop_spu, regi_iop_spu1, rw_ctrl, spu_ctrl);
+ break;
+ }
+ timeout = IOP_TIMEOUT;
+ do {
+ REG_WR(iop_sw_cpu, regi_iop_sw_cpu, rw_mc_ctrl, mc_ctrl);
+ mc_stat = REG_RD(iop_sw_cpu, regi_iop_sw_cpu, r_mc_stat);
+ } while (mc_stat.owned_by_cpu == regk_iop_sw_cpu_no && --timeout > 0);
+ if (timeout == 0) {
+ printk(KERN_ERR "Timeout waiting to acquire MC\n");
+ retval = -EBUSY;
+ goto out;
+ }
+
+ /* write to SPU memory */
+ for (i = 0; i < (fw_entry->size/4); i++) {
+ switch (spu_inst) {
+ case 0:
+ REG_WR_INT(iop_spu, regi_iop_spu0, rw_seq_pc, (i*4));
+ break;
+ case 1:
+ REG_WR_INT(iop_spu, regi_iop_spu1, rw_seq_pc, (i*4));
+ break;
+ }
+ REG_WR_INT(iop_sw_cpu, regi_iop_sw_cpu, rw_mc_data, *data);
+ data++;
+ }
+
+ /* release ownership of memory controller */
+ (void) REG_RD(iop_sw_cpu, regi_iop_sw_cpu, rs_mc_data);
+
+ out:
+ release_firmware(fw_entry);
+ return retval;
+}
+
+int iop_fw_load_mpu(unsigned char *fw_name)
+{
+ const unsigned int start_addr = 0;
+ reg_iop_mpu_rw_ctrl mpu_ctrl;
+ const struct firmware *fw_entry;
+ u32 *data;
+ int retval, i;
+
+ /* get firmware */
+ retval = request_firmware(&fw_entry, fw_name, &iop_mpu_device);
+ if (retval != 0)
+ {
+ printk(KERN_ERR
+ "iop_load_spu: Failed to load firmware \"%s\"\n",
+ fw_name);
+ return retval;
+ }
+ data = (u32 *) fw_entry->data;
+
+ /* disable MPU */
+ mpu_ctrl.en = regk_iop_mpu_no;
+ REG_WR(iop_mpu, regi_iop_mpu, rw_ctrl, mpu_ctrl);
+ /* put start address in R0 */
+ REG_WR_VECT(iop_mpu, regi_iop_mpu, rw_r, 0, start_addr);
+ /* write to memory by executing 'SWX i, 4, R0' for each word */
+ if ((retval = wait_mpu_idle()) != 0)
+ goto out;
+ REG_WR(iop_mpu, regi_iop_mpu, rw_instr, MPU_SWX_IIR_INSTR(0, 4, 0));
+ for (i = 0; i < (fw_entry->size / 4); i++) {
+ REG_WR_INT(iop_mpu, regi_iop_mpu, rw_immediate, *data);
+ if ((retval = wait_mpu_idle()) != 0)
+ goto out;
+ data++;
+ }
+
+ out:
+ release_firmware(fw_entry);
+ return retval;
+}
+
+int iop_start_mpu(unsigned int start_addr)
+{
+ reg_iop_mpu_rw_ctrl mpu_ctrl = { .en = regk_iop_mpu_yes };
+ int retval;
+
+ /* disable MPU */
+ if ((retval = wait_mpu_idle()) != 0)
+ goto out;
+ REG_WR(iop_mpu, regi_iop_mpu, rw_instr, MPU_HALT());
+ if ((retval = wait_mpu_idle()) != 0)
+ goto out;
+ /* set PC and wait for it to bite */
+ if ((retval = wait_mpu_idle()) != 0)
+ goto out;
+ REG_WR_INT(iop_mpu, regi_iop_mpu, rw_instr, MPU_BA_I(start_addr));
+ if ((retval = wait_mpu_idle()) != 0)
+ goto out;
+ /* make sure the MPU starts executing with interrupts disabled */
+ REG_WR(iop_mpu, regi_iop_mpu, rw_instr, MPU_DI());
+ if ((retval = wait_mpu_idle()) != 0)
+ goto out;
+ /* enable MPU */
+ REG_WR(iop_mpu, regi_iop_mpu, rw_ctrl, mpu_ctrl);
+ out:
+ return retval;
+}
+
+static int __init iop_fw_load_init(void)
+{
+#if 0
+ /*
+ * static struct devices can not be added directly to sysfs by ignoring
+ * the driver model infrastructure. To fix this properly, please use
+ * the platform_bus to register these devices to be able to properly
+ * use the firmware infrastructure.
+ */
+ device_initialize(&iop_spu_device[0]);
+ kobject_set_name(&iop_spu_device[0].kobj, "iop-spu0");
+ kobject_add(&iop_spu_device[0].kobj);
+ device_initialize(&iop_spu_device[1]);
+ kobject_set_name(&iop_spu_device[1].kobj, "iop-spu1");
+ kobject_add(&iop_spu_device[1].kobj);
+ device_initialize(&iop_mpu_device);
+ kobject_set_name(&iop_mpu_device.kobj, "iop-mpu");
+ kobject_add(&iop_mpu_device.kobj);
+#endif
+ return 0;
+}
+
+static void __exit iop_fw_load_exit(void)
+{
+}
+
+module_init(iop_fw_load_init);
+module_exit(iop_fw_load_exit);
+
+MODULE_DESCRIPTION("ETRAX FS IO-Processor Firmware Loader");
+MODULE_LICENSE("GPL");
+
+EXPORT_SYMBOL(iop_fw_load_spu);
+EXPORT_SYMBOL(iop_fw_load_mpu);
+EXPORT_SYMBOL(iop_start_mpu);
diff --git a/kernel/arch/cris/arch-v32/drivers/mach-a3/Makefile b/kernel/arch/cris/arch-v32/drivers/mach-a3/Makefile
new file mode 100644
index 000000000..5c6d2a2a0
--- /dev/null
+++ b/kernel/arch/cris/arch-v32/drivers/mach-a3/Makefile
@@ -0,0 +1,6 @@
+#
+# Makefile for Etrax-specific drivers
+#
+
+obj-$(CONFIG_ETRAX_NANDFLASH) += nandflash.o
+obj-$(CONFIG_ETRAX_GPIO) += gpio.o
diff --git a/kernel/arch/cris/arch-v32/drivers/mach-a3/gpio.c b/kernel/arch/cris/arch-v32/drivers/mach-a3/gpio.c
new file mode 100644
index 000000000..74f9fe809
--- /dev/null
+++ b/kernel/arch/cris/arch-v32/drivers/mach-a3/gpio.c
@@ -0,0 +1,999 @@
+/*
+ * Artec-3 general port I/O device
+ *
+ * Copyright (c) 2007 Axis Communications AB
+ *
+ * Authors: Bjorn Wesen (initial version)
+ * Ola Knutsson (LED handling)
+ * Johan Adolfsson (read/set directions, write, port G,
+ * port to ETRAX FS.
+ * Ricard Wanderlof (PWM for Artpec-3)
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/sched.h>
+#include <linux/slab.h>
+#include <linux/ioport.h>
+#include <linux/errno.h>
+#include <linux/kernel.h>
+#include <linux/fs.h>
+#include <linux/string.h>
+#include <linux/poll.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/spinlock.h>
+#include <linux/mutex.h>
+
+#include <asm/etraxgpio.h>
+#include <hwregs/reg_map.h>
+#include <hwregs/reg_rdwr.h>
+#include <hwregs/gio_defs.h>
+#include <hwregs/intr_vect_defs.h>
+#include <asm/io.h>
+#include <asm/irq.h>
+#include <mach/pinmux.h>
+
+#ifdef CONFIG_ETRAX_VIRTUAL_GPIO
+#include "../i2c.h"
+
+#define VIRT_I2C_ADDR 0x40
+#endif
+
+/* The following gio ports on ARTPEC-3 is available:
+ * pa 32 bits
+ * pb 32 bits
+ * pc 16 bits
+ * each port has a rw_px_dout, r_px_din and rw_px_oe register.
+ */
+
+#define GPIO_MAJOR 120 /* experimental MAJOR number */
+
+#define I2C_INTERRUPT_BITS 0x300 /* i2c0_done and i2c1_done bits */
+
+#define D(x)
+
+#if 0
+static int dp_cnt;
+#define DP(x) \
+ do { \
+ dp_cnt++; \
+ if (dp_cnt % 1000 == 0) \
+ x; \
+ } while (0)
+#else
+#define DP(x)
+#endif
+
+static DEFINE_MUTEX(gpio_mutex);
+static char gpio_name[] = "etrax gpio";
+
+#ifdef CONFIG_ETRAX_VIRTUAL_GPIO
+static int virtual_gpio_ioctl(struct file *file, unsigned int cmd,
+ unsigned long arg);
+#endif
+static long gpio_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
+static ssize_t gpio_write(struct file *file, const char __user *buf,
+ size_t count, loff_t *off);
+static int gpio_open(struct inode *inode, struct file *filp);
+static int gpio_release(struct inode *inode, struct file *filp);
+static unsigned int gpio_poll(struct file *filp,
+ struct poll_table_struct *wait);
+
+/* private data per open() of this driver */
+
+struct gpio_private {
+ struct gpio_private *next;
+ /* The IO_CFG_WRITE_MODE_VALUE only support 8 bits: */
+ unsigned char clk_mask;
+ unsigned char data_mask;
+ unsigned char write_msb;
+ unsigned char pad1;
+ /* These fields are generic */
+ unsigned long highalarm, lowalarm;
+ wait_queue_head_t alarm_wq;
+ int minor;
+};
+
+static void gpio_set_alarm(struct gpio_private *priv);
+static int gpio_leds_ioctl(unsigned int cmd, unsigned long arg);
+static int gpio_pwm_ioctl(struct gpio_private *priv, unsigned int cmd,
+ unsigned long arg);
+
+
+/* linked list of alarms to check for */
+
+static struct gpio_private *alarmlist;
+
+static int wanted_interrupts;
+
+static DEFINE_SPINLOCK(gpio_lock);
+
+#define NUM_PORTS (GPIO_MINOR_LAST+1)
+#define GIO_REG_RD_ADDR(reg) \
+ (unsigned long *)(regi_gio + REG_RD_ADDR_gio_##reg)
+#define GIO_REG_WR_ADDR(reg) \
+ (unsigned long *)(regi_gio + REG_WR_ADDR_gio_##reg)
+static unsigned long led_dummy;
+static unsigned long port_d_dummy; /* Only input on Artpec-3 */
+#ifdef CONFIG_ETRAX_VIRTUAL_GPIO
+static unsigned long port_e_dummy; /* Non existent on Artpec-3 */
+static unsigned long virtual_dummy;
+static unsigned long virtual_rw_pv_oe = CONFIG_ETRAX_DEF_GIO_PV_OE;
+static unsigned short cached_virtual_gpio_read;
+#endif
+
+static unsigned long *data_out[NUM_PORTS] = {
+ GIO_REG_WR_ADDR(rw_pa_dout),
+ GIO_REG_WR_ADDR(rw_pb_dout),
+ &led_dummy,
+ GIO_REG_WR_ADDR(rw_pc_dout),
+ &port_d_dummy,
+#ifdef CONFIG_ETRAX_VIRTUAL_GPIO
+ &port_e_dummy,
+ &virtual_dummy,
+#endif
+};
+
+static unsigned long *data_in[NUM_PORTS] = {
+ GIO_REG_RD_ADDR(r_pa_din),
+ GIO_REG_RD_ADDR(r_pb_din),
+ &led_dummy,
+ GIO_REG_RD_ADDR(r_pc_din),
+ GIO_REG_RD_ADDR(r_pd_din),
+#ifdef CONFIG_ETRAX_VIRTUAL_GPIO
+ &port_e_dummy,
+ &virtual_dummy,
+#endif
+};
+
+static unsigned long changeable_dir[NUM_PORTS] = {
+ CONFIG_ETRAX_PA_CHANGEABLE_DIR,
+ CONFIG_ETRAX_PB_CHANGEABLE_DIR,
+ 0,
+ CONFIG_ETRAX_PC_CHANGEABLE_DIR,
+ 0,
+#ifdef CONFIG_ETRAX_VIRTUAL_GPIO
+ 0,
+ CONFIG_ETRAX_PV_CHANGEABLE_DIR,
+#endif
+};
+
+static unsigned long changeable_bits[NUM_PORTS] = {
+ CONFIG_ETRAX_PA_CHANGEABLE_BITS,
+ CONFIG_ETRAX_PB_CHANGEABLE_BITS,
+ 0,
+ CONFIG_ETRAX_PC_CHANGEABLE_BITS,
+ 0,
+#ifdef CONFIG_ETRAX_VIRTUAL_GPIO
+ 0,
+ CONFIG_ETRAX_PV_CHANGEABLE_BITS,
+#endif
+};
+
+static unsigned long *dir_oe[NUM_PORTS] = {
+ GIO_REG_WR_ADDR(rw_pa_oe),
+ GIO_REG_WR_ADDR(rw_pb_oe),
+ &led_dummy,
+ GIO_REG_WR_ADDR(rw_pc_oe),
+ &port_d_dummy,
+#ifdef CONFIG_ETRAX_VIRTUAL_GPIO
+ &port_e_dummy,
+ &virtual_rw_pv_oe,
+#endif
+};
+
+static void gpio_set_alarm(struct gpio_private *priv)
+{
+ int bit;
+ int intr_cfg;
+ int mask;
+ int pins;
+ unsigned long flags;
+
+ spin_lock_irqsave(&gpio_lock, flags);
+ intr_cfg = REG_RD_INT(gio, regi_gio, rw_intr_cfg);
+ pins = REG_RD_INT(gio, regi_gio, rw_intr_pins);
+ mask = REG_RD_INT(gio, regi_gio, rw_intr_mask) & I2C_INTERRUPT_BITS;
+
+ for (bit = 0; bit < 32; bit++) {
+ int intr = bit % 8;
+ int pin = bit / 8;
+ if (priv->minor < GPIO_MINOR_LEDS)
+ pin += priv->minor * 4;
+ else
+ pin += (priv->minor - 1) * 4;
+
+ if (priv->highalarm & (1<<bit)) {
+ intr_cfg |= (regk_gio_hi << (intr * 3));
+ mask |= 1 << intr;
+ wanted_interrupts = mask & 0xff;
+ pins |= pin << (intr * 4);
+ } else if (priv->lowalarm & (1<<bit)) {
+ intr_cfg |= (regk_gio_lo << (intr * 3));
+ mask |= 1 << intr;
+ wanted_interrupts = mask & 0xff;
+ pins |= pin << (intr * 4);
+ }
+ }
+
+ REG_WR_INT(gio, regi_gio, rw_intr_cfg, intr_cfg);
+ REG_WR_INT(gio, regi_gio, rw_intr_pins, pins);
+ REG_WR_INT(gio, regi_gio, rw_intr_mask, mask);
+
+ spin_unlock_irqrestore(&gpio_lock, flags);
+}
+
+static unsigned int gpio_poll(struct file *file, struct poll_table_struct *wait)
+{
+ unsigned int mask = 0;
+ struct gpio_private *priv = file->private_data;
+ unsigned long data;
+ unsigned long tmp;
+
+ if (priv->minor >= GPIO_MINOR_PWM0 &&
+ priv->minor <= GPIO_MINOR_LAST_PWM)
+ return 0;
+
+ poll_wait(file, &priv->alarm_wq, wait);
+ if (priv->minor <= GPIO_MINOR_D) {
+ data = readl(data_in[priv->minor]);
+ REG_WR_INT(gio, regi_gio, rw_ack_intr, wanted_interrupts);
+ tmp = REG_RD_INT(gio, regi_gio, rw_intr_mask);
+ tmp &= I2C_INTERRUPT_BITS;
+ tmp |= wanted_interrupts;
+ REG_WR_INT(gio, regi_gio, rw_intr_mask, tmp);
+ } else
+ return 0;
+
+ if ((data & priv->highalarm) || (~data & priv->lowalarm))
+ mask = POLLIN|POLLRDNORM;
+
+ DP(printk(KERN_DEBUG "gpio_poll ready: mask 0x%08X\n", mask));
+ return mask;
+}
+
+static irqreturn_t gpio_interrupt(int irq, void *dev_id)
+{
+ reg_gio_rw_intr_mask intr_mask;
+ reg_gio_r_masked_intr masked_intr;
+ reg_gio_rw_ack_intr ack_intr;
+ unsigned long flags;
+ unsigned long tmp;
+ unsigned long tmp2;
+#ifdef CONFIG_ETRAX_VIRTUAL_GPIO
+ unsigned char enable_gpiov_ack = 0;
+#endif
+
+ /* Find what PA interrupts are active */
+ masked_intr = REG_RD(gio, regi_gio, r_masked_intr);
+ tmp = REG_TYPE_CONV(unsigned long, reg_gio_r_masked_intr, masked_intr);
+
+ /* Find those that we have enabled */
+ spin_lock_irqsave(&gpio_lock, flags);
+ tmp &= wanted_interrupts;
+ spin_unlock_irqrestore(&gpio_lock, flags);
+
+#ifdef CONFIG_ETRAX_VIRTUAL_GPIO
+ /* Something changed on virtual GPIO. Interrupt is acked by
+ * reading the device.
+ */
+ if (tmp & (1 << CONFIG_ETRAX_VIRTUAL_GPIO_INTERRUPT_PA_PIN)) {
+ i2c_read(VIRT_I2C_ADDR, (void *)&cached_virtual_gpio_read,
+ sizeof(cached_virtual_gpio_read));
+ enable_gpiov_ack = 1;
+ }
+#endif
+
+ /* Ack them */
+ ack_intr = REG_TYPE_CONV(reg_gio_rw_ack_intr, unsigned long, tmp);
+ REG_WR(gio, regi_gio, rw_ack_intr, ack_intr);
+
+ /* Disable those interrupts.. */
+ intr_mask = REG_RD(gio, regi_gio, rw_intr_mask);
+ tmp2 = REG_TYPE_CONV(unsigned long, reg_gio_rw_intr_mask, intr_mask);
+ tmp2 &= ~tmp;
+#ifdef CONFIG_ETRAX_VIRTUAL_GPIO
+ /* Do not disable interrupt on virtual GPIO. Changes on virtual
+ * pins are only noticed by an interrupt.
+ */
+ if (enable_gpiov_ack)
+ tmp2 |= (1 << CONFIG_ETRAX_VIRTUAL_GPIO_INTERRUPT_PA_PIN);
+#endif
+ intr_mask = REG_TYPE_CONV(reg_gio_rw_intr_mask, unsigned long, tmp2);
+ REG_WR(gio, regi_gio, rw_intr_mask, intr_mask);
+
+ return IRQ_RETVAL(tmp);
+}
+
+static void gpio_write_bit(unsigned long *port, unsigned char data, int bit,
+ unsigned char clk_mask, unsigned char data_mask)
+{
+ unsigned long shadow = readl(port) & ~clk_mask;
+ writel(shadow, port);
+ if (data & 1 << bit)
+ shadow |= data_mask;
+ else
+ shadow &= ~data_mask;
+ writel(shadow, port);
+ /* For FPGA: min 5.0ns (DCC) before CCLK high */
+ shadow |= clk_mask;
+ writel(shadow, port);
+}
+
+static void gpio_write_byte(struct gpio_private *priv, unsigned long *port,
+ unsigned char data)
+{
+ int i;
+
+ if (priv->write_msb)
+ for (i = 7; i >= 0; i--)
+ gpio_write_bit(port, data, i, priv->clk_mask,
+ priv->data_mask);
+ else
+ for (i = 0; i <= 7; i++)
+ gpio_write_bit(port, data, i, priv->clk_mask,
+ priv->data_mask);
+}
+
+
+static ssize_t gpio_write(struct file *file, const char __user *buf,
+ size_t count, loff_t *off)
+{
+ struct gpio_private *priv = file->private_data;
+ unsigned long flags;
+ ssize_t retval = count;
+ /* Only bits 0-7 may be used for write operations but allow all
+ devices except leds... */
+#ifdef CONFIG_ETRAX_VIRTUAL_GPIO
+ if (priv->minor == GPIO_MINOR_V)
+ return -EFAULT;
+#endif
+ if (priv->minor == GPIO_MINOR_LEDS)
+ return -EFAULT;
+
+ if (priv->minor >= GPIO_MINOR_PWM0 &&
+ priv->minor <= GPIO_MINOR_LAST_PWM)
+ return -EFAULT;
+
+ if (!access_ok(VERIFY_READ, buf, count))
+ return -EFAULT;
+
+ /* It must have been configured using the IO_CFG_WRITE_MODE */
+ /* Perhaps a better error code? */
+ if (priv->clk_mask == 0 || priv->data_mask == 0)
+ return -EPERM;
+
+ D(printk(KERN_DEBUG "gpio_write: %lu to data 0x%02X clk 0x%02X "
+ "msb: %i\n",
+ count, priv->data_mask, priv->clk_mask, priv->write_msb));
+
+ spin_lock_irqsave(&gpio_lock, flags);
+
+ while (count--)
+ gpio_write_byte(priv, data_out[priv->minor], *buf++);
+
+ spin_unlock_irqrestore(&gpio_lock, flags);
+ return retval;
+}
+
+static int gpio_open(struct inode *inode, struct file *filp)
+{
+ struct gpio_private *priv;
+ int p = iminor(inode);
+
+ if (p > GPIO_MINOR_LAST_PWM ||
+ (p > GPIO_MINOR_LAST && p < GPIO_MINOR_PWM0))
+ return -EINVAL;
+
+ priv = kmalloc(sizeof(struct gpio_private), GFP_KERNEL);
+
+ if (!priv)
+ return -ENOMEM;
+
+ mutex_lock(&gpio_mutex);
+ memset(priv, 0, sizeof(*priv));
+
+ priv->minor = p;
+ filp->private_data = priv;
+
+ /* initialize the io/alarm struct, not for PWM ports though */
+ if (p <= GPIO_MINOR_LAST) {
+
+ priv->clk_mask = 0;
+ priv->data_mask = 0;
+ priv->highalarm = 0;
+ priv->lowalarm = 0;
+
+ init_waitqueue_head(&priv->alarm_wq);
+
+ /* link it into our alarmlist */
+ spin_lock_irq(&gpio_lock);
+ priv->next = alarmlist;
+ alarmlist = priv;
+ spin_unlock_irq(&gpio_lock);
+ }
+
+ mutex_unlock(&gpio_mutex);
+ return 0;
+}
+
+static int gpio_release(struct inode *inode, struct file *filp)
+{
+ struct gpio_private *p;
+ struct gpio_private *todel;
+ /* local copies while updating them: */
+ unsigned long a_high, a_low;
+
+ /* prepare to free private structure */
+ todel = filp->private_data;
+
+ /* unlink from alarmlist - only for non-PWM ports though */
+ if (todel->minor <= GPIO_MINOR_LAST) {
+ spin_lock_irq(&gpio_lock);
+ p = alarmlist;
+
+ if (p == todel)
+ alarmlist = todel->next;
+ else {
+ while (p->next != todel)
+ p = p->next;
+ p->next = todel->next;
+ }
+
+ /* Check if there are still any alarms set */
+ p = alarmlist;
+ a_high = 0;
+ a_low = 0;
+ while (p) {
+ if (p->minor == GPIO_MINOR_A) {
+#ifdef CONFIG_ETRAX_VIRTUAL_GPIO
+ p->lowalarm |= (1 << CONFIG_ETRAX_VIRTUAL_GPIO_INTERRUPT_PA_PIN);
+#endif
+ a_high |= p->highalarm;
+ a_low |= p->lowalarm;
+ }
+
+ p = p->next;
+ }
+
+#ifdef CONFIG_ETRAX_VIRTUAL_GPIO
+ /* Variable 'a_low' needs to be set here again
+ * to ensure that interrupt for virtual GPIO is handled.
+ */
+ a_low |= (1 << CONFIG_ETRAX_VIRTUAL_GPIO_INTERRUPT_PA_PIN);
+#endif
+
+ spin_unlock_irq(&gpio_lock);
+ }
+ kfree(todel);
+
+ return 0;
+}
+
+/* Main device API. ioctl's to read/set/clear bits, as well as to
+ * set alarms to wait for using a subsequent select().
+ */
+
+inline unsigned long setget_input(struct gpio_private *priv, unsigned long arg)
+{
+ /* Set direction 0=unchanged 1=input,
+ * return mask with 1=input
+ */
+ unsigned long flags;
+ unsigned long dir_shadow;
+
+ spin_lock_irqsave(&gpio_lock, flags);
+
+ dir_shadow = readl(dir_oe[priv->minor]) &
+ ~(arg & changeable_dir[priv->minor]);
+ writel(dir_shadow, dir_oe[priv->minor]);
+
+ spin_unlock_irqrestore(&gpio_lock, flags);
+
+ if (priv->minor == GPIO_MINOR_C)
+ dir_shadow ^= 0xFFFF; /* Only 16 bits */
+#ifdef CONFIG_ETRAX_VIRTUAL_GPIO
+ else if (priv->minor == GPIO_MINOR_V)
+ dir_shadow ^= 0xFFFF; /* Only 16 bits */
+#endif
+ else
+ dir_shadow ^= 0xFFFFFFFF; /* PA, PB and PD 32 bits */
+
+ return dir_shadow;
+
+} /* setget_input */
+
+static inline unsigned long setget_output(struct gpio_private *priv,
+ unsigned long arg)
+{
+ unsigned long flags;
+ unsigned long dir_shadow;
+
+ spin_lock_irqsave(&gpio_lock, flags);
+
+ dir_shadow = readl(dir_oe[priv->minor]) |
+ (arg & changeable_dir[priv->minor]);
+ writel(dir_shadow, dir_oe[priv->minor]);
+
+ spin_unlock_irqrestore(&gpio_lock, flags);
+ return dir_shadow;
+} /* setget_output */
+
+static long gpio_ioctl_unlocked(struct file *file,
+ unsigned int cmd, unsigned long arg)
+{
+ unsigned long flags;
+ unsigned long val;
+ unsigned long shadow;
+ struct gpio_private *priv = file->private_data;
+
+ if (_IOC_TYPE(cmd) != ETRAXGPIO_IOCTYPE)
+ return -ENOTTY;
+
+ /* Check for special ioctl handlers first */
+
+#ifdef CONFIG_ETRAX_VIRTUAL_GPIO
+ if (priv->minor == GPIO_MINOR_V)
+ return virtual_gpio_ioctl(file, cmd, arg);
+#endif
+
+ if (priv->minor == GPIO_MINOR_LEDS)
+ return gpio_leds_ioctl(cmd, arg);
+
+ if (priv->minor >= GPIO_MINOR_PWM0 &&
+ priv->minor <= GPIO_MINOR_LAST_PWM)
+ return gpio_pwm_ioctl(priv, cmd, arg);
+
+ switch (_IOC_NR(cmd)) {
+ case IO_READBITS: /* Use IO_READ_INBITS and IO_READ_OUTBITS instead */
+ /* Read the port. */
+ return readl(data_in[priv->minor]);
+ case IO_SETBITS:
+ spin_lock_irqsave(&gpio_lock, flags);
+ /* Set changeable bits with a 1 in arg. */
+ shadow = readl(data_out[priv->minor]) |
+ (arg & changeable_bits[priv->minor]);
+ writel(shadow, data_out[priv->minor]);
+ spin_unlock_irqrestore(&gpio_lock, flags);
+ break;
+ case IO_CLRBITS:
+ spin_lock_irqsave(&gpio_lock, flags);
+ /* Clear changeable bits with a 1 in arg. */
+ shadow = readl(data_out[priv->minor]) &
+ ~(arg & changeable_bits[priv->minor]);
+ writel(shadow, data_out[priv->minor]);
+ spin_unlock_irqrestore(&gpio_lock, flags);
+ break;
+ case IO_HIGHALARM:
+ /* Set alarm when bits with 1 in arg go high. */
+ priv->highalarm |= arg;
+ gpio_set_alarm(priv);
+ break;
+ case IO_LOWALARM:
+ /* Set alarm when bits with 1 in arg go low. */
+ priv->lowalarm |= arg;
+ gpio_set_alarm(priv);
+ break;
+ case IO_CLRALARM:
+ /* Clear alarm for bits with 1 in arg. */
+ priv->highalarm &= ~arg;
+ priv->lowalarm &= ~arg;
+ gpio_set_alarm(priv);
+ break;
+ case IO_READDIR: /* Use IO_SETGET_INPUT/OUTPUT instead! */
+ /* Read direction 0=input 1=output */
+ return readl(dir_oe[priv->minor]);
+
+ case IO_SETINPUT: /* Use IO_SETGET_INPUT instead! */
+ /* Set direction 0=unchanged 1=input,
+ * return mask with 1=input
+ */
+ return setget_input(priv, arg);
+
+ case IO_SETOUTPUT: /* Use IO_SETGET_OUTPUT instead! */
+ /* Set direction 0=unchanged 1=output,
+ * return mask with 1=output
+ */
+ return setget_output(priv, arg);
+
+ case IO_CFG_WRITE_MODE:
+ {
+ int res = -EPERM;
+ unsigned long dir_shadow, clk_mask, data_mask, write_msb;
+
+ clk_mask = arg & 0xFF;
+ data_mask = (arg >> 8) & 0xFF;
+ write_msb = (arg >> 16) & 0x01;
+
+ /* Check if we're allowed to change the bits and
+ * the direction is correct
+ */
+ spin_lock_irqsave(&gpio_lock, flags);
+ dir_shadow = readl(dir_oe[priv->minor]);
+ if ((clk_mask & changeable_bits[priv->minor]) &&
+ (data_mask & changeable_bits[priv->minor]) &&
+ (clk_mask & dir_shadow) &&
+ (data_mask & dir_shadow)) {
+ priv->clk_mask = clk_mask;
+ priv->data_mask = data_mask;
+ priv->write_msb = write_msb;
+ res = 0;
+ }
+ spin_unlock_irqrestore(&gpio_lock, flags);
+
+ return res;
+ }
+ case IO_READ_INBITS:
+ /* *arg is result of reading the input pins */
+ val = readl(data_in[priv->minor]);
+ if (copy_to_user((void __user *)arg, &val, sizeof(val)))
+ return -EFAULT;
+ return 0;
+ case IO_READ_OUTBITS:
+ /* *arg is result of reading the output shadow */
+ val = *data_out[priv->minor];
+ if (copy_to_user((void __user *)arg, &val, sizeof(val)))
+ return -EFAULT;
+ break;
+ case IO_SETGET_INPUT:
+ /* bits set in *arg is set to input,
+ * *arg updated with current input pins.
+ */
+ if (copy_from_user(&val, (void __user *)arg, sizeof(val)))
+ return -EFAULT;
+ val = setget_input(priv, val);
+ if (copy_to_user((void __user *)arg, &val, sizeof(val)))
+ return -EFAULT;
+ break;
+ case IO_SETGET_OUTPUT:
+ /* bits set in *arg is set to output,
+ * *arg updated with current output pins.
+ */
+ if (copy_from_user(&val, (void __user *)arg, sizeof(val)))
+ return -EFAULT;
+ val = setget_output(priv, val);
+ if (copy_to_user((void __user *)arg, &val, sizeof(val)))
+ return -EFAULT;
+ break;
+ default:
+ return -EINVAL;
+ } /* switch */
+
+ return 0;
+}
+
+static long gpio_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
+{
+ long ret;
+
+ mutex_lock(&gpio_mutex);
+ ret = gpio_ioctl_unlocked(file, cmd, arg);
+ mutex_unlock(&gpio_mutex);
+
+ return ret;
+}
+
+#ifdef CONFIG_ETRAX_VIRTUAL_GPIO
+static int virtual_gpio_ioctl(struct file *file, unsigned int cmd,
+ unsigned long arg)
+{
+ unsigned long flags;
+ unsigned short val;
+ unsigned short shadow;
+ struct gpio_private *priv = file->private_data;
+
+ switch (_IOC_NR(cmd)) {
+ case IO_SETBITS:
+ spin_lock_irqsave(&gpio_lock, flags);
+ /* Set changeable bits with a 1 in arg. */
+ i2c_read(VIRT_I2C_ADDR, (void *)&shadow, sizeof(shadow));
+ shadow |= ~readl(dir_oe[priv->minor]) |
+ (arg & changeable_bits[priv->minor]);
+ i2c_write(VIRT_I2C_ADDR, (void *)&shadow, sizeof(shadow));
+ spin_unlock_irqrestore(&gpio_lock, flags);
+ break;
+ case IO_CLRBITS:
+ spin_lock_irqsave(&gpio_lock, flags);
+ /* Clear changeable bits with a 1 in arg. */
+ i2c_read(VIRT_I2C_ADDR, (void *)&shadow, sizeof(shadow));
+ shadow |= ~readl(dir_oe[priv->minor]) &
+ ~(arg & changeable_bits[priv->minor]);
+ i2c_write(VIRT_I2C_ADDR, (void *)&shadow, sizeof(shadow));
+ spin_unlock_irqrestore(&gpio_lock, flags);
+ break;
+ case IO_HIGHALARM:
+ /* Set alarm when bits with 1 in arg go high. */
+ priv->highalarm |= arg;
+ break;
+ case IO_LOWALARM:
+ /* Set alarm when bits with 1 in arg go low. */
+ priv->lowalarm |= arg;
+ break;
+ case IO_CLRALARM:
+ /* Clear alarm for bits with 1 in arg. */
+ priv->highalarm &= ~arg;
+ priv->lowalarm &= ~arg;
+ break;
+ case IO_CFG_WRITE_MODE:
+ {
+ unsigned long dir_shadow;
+ dir_shadow = readl(dir_oe[priv->minor]);
+
+ priv->clk_mask = arg & 0xFF;
+ priv->data_mask = (arg >> 8) & 0xFF;
+ priv->write_msb = (arg >> 16) & 0x01;
+ /* Check if we're allowed to change the bits and
+ * the direction is correct
+ */
+ if (!((priv->clk_mask & changeable_bits[priv->minor]) &&
+ (priv->data_mask & changeable_bits[priv->minor]) &&
+ (priv->clk_mask & dir_shadow) &&
+ (priv->data_mask & dir_shadow))) {
+ priv->clk_mask = 0;
+ priv->data_mask = 0;
+ return -EPERM;
+ }
+ break;
+ }
+ case IO_READ_INBITS:
+ /* *arg is result of reading the input pins */
+ val = cached_virtual_gpio_read & ~readl(dir_oe[priv->minor]);
+ if (copy_to_user((void __user *)arg, &val, sizeof(val)))
+ return -EFAULT;
+ return 0;
+
+ case IO_READ_OUTBITS:
+ /* *arg is result of reading the output shadow */
+ i2c_read(VIRT_I2C_ADDR, (void *)&val, sizeof(val));
+ val &= readl(dir_oe[priv->minor]);
+ if (copy_to_user((void __user *)arg, &val, sizeof(val)))
+ return -EFAULT;
+ break;
+ case IO_SETGET_INPUT:
+ {
+ /* bits set in *arg is set to input,
+ * *arg updated with current input pins.
+ */
+ unsigned short input_mask = ~readl(dir_oe[priv->minor]);
+ if (copy_from_user(&val, (void __user *)arg, sizeof(val)))
+ return -EFAULT;
+ val = setget_input(priv, val);
+ if (copy_to_user((void __user *)arg, &val, sizeof(val)))
+ return -EFAULT;
+ if ((input_mask & val) != input_mask) {
+ /* Input pins changed. All ports desired as input
+ * should be set to logic 1.
+ */
+ unsigned short change = input_mask ^ val;
+ i2c_read(VIRT_I2C_ADDR, (void *)&shadow,
+ sizeof(shadow));
+ shadow &= ~change;
+ shadow |= val;
+ i2c_write(VIRT_I2C_ADDR, (void *)&shadow,
+ sizeof(shadow));
+ }
+ break;
+ }
+ case IO_SETGET_OUTPUT:
+ /* bits set in *arg is set to output,
+ * *arg updated with current output pins.
+ */
+ if (copy_from_user(&val, (void __user *)arg, sizeof(val)))
+ return -EFAULT;
+ val = setget_output(priv, val);
+ if (copy_to_user((void __user *)arg, &val, sizeof(val)))
+ return -EFAULT;
+ break;
+ default:
+ return -EINVAL;
+ } /* switch */
+ return 0;
+}
+#endif /* CONFIG_ETRAX_VIRTUAL_GPIO */
+
+static int gpio_leds_ioctl(unsigned int cmd, unsigned long arg)
+{
+ unsigned char green;
+ unsigned char red;
+
+ switch (_IOC_NR(cmd)) {
+ case IO_LEDACTIVE_SET:
+ green = ((unsigned char) arg) & 1;
+ red = (((unsigned char) arg) >> 1) & 1;
+ CRIS_LED_ACTIVE_SET_G(green);
+ CRIS_LED_ACTIVE_SET_R(red);
+ break;
+
+ default:
+ return -EINVAL;
+ } /* switch */
+
+ return 0;
+}
+
+static int gpio_pwm_set_mode(unsigned long arg, int pwm_port)
+{
+ int pinmux_pwm = pinmux_pwm0 + pwm_port;
+ int mode;
+ reg_gio_rw_pwm0_ctrl rw_pwm_ctrl = {
+ .ccd_val = 0,
+ .ccd_override = regk_gio_no,
+ .mode = regk_gio_no
+ };
+ int allocstatus;
+
+ if (get_user(mode, &((struct io_pwm_set_mode *) arg)->mode))
+ return -EFAULT;
+ rw_pwm_ctrl.mode = mode;
+ if (mode != PWM_OFF)
+ allocstatus = crisv32_pinmux_alloc_fixed(pinmux_pwm);
+ else
+ allocstatus = crisv32_pinmux_dealloc_fixed(pinmux_pwm);
+ if (allocstatus)
+ return allocstatus;
+ REG_WRITE(reg_gio_rw_pwm0_ctrl, REG_ADDR(gio, regi_gio, rw_pwm0_ctrl) +
+ 12 * pwm_port, rw_pwm_ctrl);
+ return 0;
+}
+
+static int gpio_pwm_set_period(unsigned long arg, int pwm_port)
+{
+ struct io_pwm_set_period periods;
+ reg_gio_rw_pwm0_var rw_pwm_widths;
+
+ if (copy_from_user(&periods, (void __user *)arg, sizeof(periods)))
+ return -EFAULT;
+ if (periods.lo > 8191 || periods.hi > 8191)
+ return -EINVAL;
+ rw_pwm_widths.lo = periods.lo;
+ rw_pwm_widths.hi = periods.hi;
+ REG_WRITE(reg_gio_rw_pwm0_var, REG_ADDR(gio, regi_gio, rw_pwm0_var) +
+ 12 * pwm_port, rw_pwm_widths);
+ return 0;
+}
+
+static int gpio_pwm_set_duty(unsigned long arg, int pwm_port)
+{
+ unsigned int duty;
+ reg_gio_rw_pwm0_data rw_pwm_duty;
+
+ if (get_user(duty, &((struct io_pwm_set_duty *) arg)->duty))
+ return -EFAULT;
+ if (duty > 255)
+ return -EINVAL;
+ rw_pwm_duty.data = duty;
+ REG_WRITE(reg_gio_rw_pwm0_data, REG_ADDR(gio, regi_gio, rw_pwm0_data) +
+ 12 * pwm_port, rw_pwm_duty);
+ return 0;
+}
+
+static int gpio_pwm_ioctl(struct gpio_private *priv, unsigned int cmd,
+ unsigned long arg)
+{
+ int pwm_port = priv->minor - GPIO_MINOR_PWM0;
+
+ switch (_IOC_NR(cmd)) {
+ case IO_PWM_SET_MODE:
+ return gpio_pwm_set_mode(arg, pwm_port);
+ case IO_PWM_SET_PERIOD:
+ return gpio_pwm_set_period(arg, pwm_port);
+ case IO_PWM_SET_DUTY:
+ return gpio_pwm_set_duty(arg, pwm_port);
+ default:
+ return -EINVAL;
+ }
+ return 0;
+}
+
+static const struct file_operations gpio_fops = {
+ .owner = THIS_MODULE,
+ .poll = gpio_poll,
+ .unlocked_ioctl = gpio_ioctl,
+ .write = gpio_write,
+ .open = gpio_open,
+ .release = gpio_release,
+ .llseek = noop_llseek,
+};
+
+#ifdef CONFIG_ETRAX_VIRTUAL_GPIO
+static void __init virtual_gpio_init(void)
+{
+ reg_gio_rw_intr_cfg intr_cfg;
+ reg_gio_rw_intr_mask intr_mask;
+ unsigned short shadow;
+
+ shadow = ~virtual_rw_pv_oe; /* Input ports should be set to logic 1 */
+ shadow |= CONFIG_ETRAX_DEF_GIO_PV_OUT;
+ i2c_write(VIRT_I2C_ADDR, (void *)&shadow, sizeof(shadow));
+
+ /* Set interrupt mask and on what state the interrupt shall trigger.
+ * For virtual gpio the interrupt shall trigger on logic '0'.
+ */
+ intr_cfg = REG_RD(gio, regi_gio, rw_intr_cfg);
+ intr_mask = REG_RD(gio, regi_gio, rw_intr_mask);
+
+ switch (CONFIG_ETRAX_VIRTUAL_GPIO_INTERRUPT_PA_PIN) {
+ case 0:
+ intr_cfg.pa0 = regk_gio_lo;
+ intr_mask.pa0 = regk_gio_yes;
+ break;
+ case 1:
+ intr_cfg.pa1 = regk_gio_lo;
+ intr_mask.pa1 = regk_gio_yes;
+ break;
+ case 2:
+ intr_cfg.pa2 = regk_gio_lo;
+ intr_mask.pa2 = regk_gio_yes;
+ break;
+ case 3:
+ intr_cfg.pa3 = regk_gio_lo;
+ intr_mask.pa3 = regk_gio_yes;
+ break;
+ case 4:
+ intr_cfg.pa4 = regk_gio_lo;
+ intr_mask.pa4 = regk_gio_yes;
+ break;
+ case 5:
+ intr_cfg.pa5 = regk_gio_lo;
+ intr_mask.pa5 = regk_gio_yes;
+ break;
+ case 6:
+ intr_cfg.pa6 = regk_gio_lo;
+ intr_mask.pa6 = regk_gio_yes;
+ break;
+ case 7:
+ intr_cfg.pa7 = regk_gio_lo;
+ intr_mask.pa7 = regk_gio_yes;
+ break;
+ }
+
+ REG_WR(gio, regi_gio, rw_intr_cfg, intr_cfg);
+ REG_WR(gio, regi_gio, rw_intr_mask, intr_mask);
+}
+#endif
+
+/* main driver initialization routine, called from mem.c */
+
+static int __init gpio_init(void)
+{
+ int res;
+
+ printk(KERN_INFO "ETRAX FS GPIO driver v2.7, (c) 2003-2008 "
+ "Axis Communications AB\n");
+
+ /* do the formalities */
+
+ res = register_chrdev(GPIO_MAJOR, gpio_name, &gpio_fops);
+ if (res < 0) {
+ printk(KERN_ERR "gpio: couldn't get a major number.\n");
+ return res;
+ }
+
+ /* Clear all leds */
+ CRIS_LED_NETWORK_GRP0_SET(0);
+ CRIS_LED_NETWORK_GRP1_SET(0);
+ CRIS_LED_ACTIVE_SET(0);
+ CRIS_LED_DISK_READ(0);
+ CRIS_LED_DISK_WRITE(0);
+
+ int res2 = request_irq(GIO_INTR_VECT, gpio_interrupt,
+ IRQF_SHARED, "gpio", &alarmlist);
+ if (res2) {
+ printk(KERN_ERR "err: irq for gpio\n");
+ return res2;
+ }
+
+ /* No IRQs by default. */
+ REG_WR_INT(gio, regi_gio, rw_intr_pins, 0);
+
+#ifdef CONFIG_ETRAX_VIRTUAL_GPIO
+ virtual_gpio_init();
+#endif
+
+ return res;
+}
+
+/* this makes sure that gpio_init is called during kernel boot */
+
+module_init(gpio_init);
diff --git a/kernel/arch/cris/arch-v32/drivers/mach-a3/nandflash.c b/kernel/arch/cris/arch-v32/drivers/mach-a3/nandflash.c
new file mode 100644
index 000000000..7fb52128d
--- /dev/null
+++ b/kernel/arch/cris/arch-v32/drivers/mach-a3/nandflash.c
@@ -0,0 +1,180 @@
+/*
+ * arch/cris/arch-v32/drivers/nandflash.c
+ *
+ * Copyright (c) 2007
+ *
+ * Derived from drivers/mtd/nand/spia.c
+ * Copyright (C) 2000 Steven J. Hill (sjhill@realitydiluted.com)
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ */
+
+#include <linux/slab.h>
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/mtd/mtd.h>
+#include <linux/mtd/nand.h>
+#include <linux/mtd/partitions.h>
+#include <arch/memmap.h>
+#include <hwregs/reg_map.h>
+#include <hwregs/reg_rdwr.h>
+#include <hwregs/pio_defs.h>
+#include <pinmux.h>
+#include <asm/io.h>
+
+#define MANUAL_ALE_CLE_CONTROL 1
+
+#define regf_ALE a0
+#define regf_CLE a1
+#define regf_NCE ce0_n
+
+#define CLE_BIT 10
+#define ALE_BIT 11
+#define CE_BIT 12
+
+struct mtd_info_wrapper {
+ struct mtd_info info;
+ struct nand_chip chip;
+};
+
+/* Bitmask for control pins */
+#define PIN_BITMASK ((1 << CE_BIT) | (1 << CLE_BIT) | (1 << ALE_BIT))
+
+static struct mtd_info *crisv32_mtd;
+/*
+ * hardware specific access to control-lines
+ */
+static void crisv32_hwcontrol(struct mtd_info *mtd, int cmd,
+ unsigned int ctrl)
+{
+ unsigned long flags;
+ reg_pio_rw_dout dout;
+ struct nand_chip *this = mtd->priv;
+
+ local_irq_save(flags);
+
+ /* control bits change */
+ if (ctrl & NAND_CTRL_CHANGE) {
+ dout = REG_RD(pio, regi_pio, rw_dout);
+ dout.regf_NCE = (ctrl & NAND_NCE) ? 0 : 1;
+
+#if !MANUAL_ALE_CLE_CONTROL
+ if (ctrl & NAND_ALE) {
+ /* A0 = ALE high */
+ this->IO_ADDR_W = (void __iomem *)REG_ADDR(pio,
+ regi_pio, rw_io_access1);
+ } else if (ctrl & NAND_CLE) {
+ /* A1 = CLE high */
+ this->IO_ADDR_W = (void __iomem *)REG_ADDR(pio,
+ regi_pio, rw_io_access2);
+ } else {
+ /* A1 = CLE and A0 = ALE low */
+ this->IO_ADDR_W = (void __iomem *)REG_ADDR(pio,
+ regi_pio, rw_io_access0);
+ }
+#else
+
+ dout.regf_CLE = (ctrl & NAND_CLE) ? 1 : 0;
+ dout.regf_ALE = (ctrl & NAND_ALE) ? 1 : 0;
+#endif
+ REG_WR(pio, regi_pio, rw_dout, dout);
+ }
+
+ /* command to chip */
+ if (cmd != NAND_CMD_NONE)
+ writeb(cmd, this->IO_ADDR_W);
+
+ local_irq_restore(flags);
+}
+
+/*
+* read device ready pin
+*/
+static int crisv32_device_ready(struct mtd_info *mtd)
+{
+ reg_pio_r_din din = REG_RD(pio, regi_pio, r_din);
+ return din.rdy;
+}
+
+/*
+ * Main initialization routine
+ */
+struct mtd_info *__init crisv32_nand_flash_probe(void)
+{
+ void __iomem *read_cs;
+ void __iomem *write_cs;
+
+ struct mtd_info_wrapper *wrapper;
+ struct nand_chip *this;
+ int err = 0;
+
+ reg_pio_rw_man_ctrl man_ctrl = {
+ .regf_NCE = regk_pio_yes,
+#if MANUAL_ALE_CLE_CONTROL
+ .regf_ALE = regk_pio_yes,
+ .regf_CLE = regk_pio_yes
+#endif
+ };
+ reg_pio_rw_oe oe = {
+ .regf_NCE = regk_pio_yes,
+#if MANUAL_ALE_CLE_CONTROL
+ .regf_ALE = regk_pio_yes,
+ .regf_CLE = regk_pio_yes
+#endif
+ };
+ reg_pio_rw_dout dout = { .regf_NCE = 1 };
+
+ /* Allocate pio pins to pio */
+ crisv32_pinmux_alloc_fixed(pinmux_pio);
+ /* Set up CE, ALE, CLE (ce0_n, a0, a1) for manual control and output */
+ REG_WR(pio, regi_pio, rw_man_ctrl, man_ctrl);
+ REG_WR(pio, regi_pio, rw_dout, dout);
+ REG_WR(pio, regi_pio, rw_oe, oe);
+
+ /* Allocate memory for MTD device structure and private data */
+ wrapper = kzalloc(sizeof(struct mtd_info_wrapper), GFP_KERNEL);
+ if (!wrapper) {
+ printk(KERN_ERR "Unable to allocate CRISv32 NAND MTD "
+ "device structure.\n");
+ err = -ENOMEM;
+ return NULL;
+ }
+
+ read_cs = write_cs = (void __iomem *)REG_ADDR(pio, regi_pio,
+ rw_io_access0);
+
+ /* Get pointer to private data */
+ this = &wrapper->chip;
+ crisv32_mtd = &wrapper->info;
+
+ /* Link the private data with the MTD structure */
+ crisv32_mtd->priv = this;
+
+ /* Set address of NAND IO lines */
+ this->IO_ADDR_R = read_cs;
+ this->IO_ADDR_W = write_cs;
+ this->cmd_ctrl = crisv32_hwcontrol;
+ this->dev_ready = crisv32_device_ready;
+ /* 20 us command delay time */
+ this->chip_delay = 20;
+ this->ecc.mode = NAND_ECC_SOFT;
+
+ /* Enable the following for a flash based bad block table */
+ /* this->bbt_options = NAND_BBT_USE_FLASH; */
+
+ /* Scan to find existence of the device */
+ if (nand_scan(crisv32_mtd, 1)) {
+ err = -ENXIO;
+ goto out_mtd;
+ }
+
+ return crisv32_mtd;
+
+out_mtd:
+ kfree(wrapper);
+ return NULL;
+}
+
diff --git a/kernel/arch/cris/arch-v32/drivers/mach-fs/Makefile b/kernel/arch/cris/arch-v32/drivers/mach-fs/Makefile
new file mode 100644
index 000000000..5c6d2a2a0
--- /dev/null
+++ b/kernel/arch/cris/arch-v32/drivers/mach-fs/Makefile
@@ -0,0 +1,6 @@
+#
+# Makefile for Etrax-specific drivers
+#
+
+obj-$(CONFIG_ETRAX_NANDFLASH) += nandflash.o
+obj-$(CONFIG_ETRAX_GPIO) += gpio.o
diff --git a/kernel/arch/cris/arch-v32/drivers/mach-fs/gpio.c b/kernel/arch/cris/arch-v32/drivers/mach-fs/gpio.c
new file mode 100644
index 000000000..009f4ee1b
--- /dev/null
+++ b/kernel/arch/cris/arch-v32/drivers/mach-fs/gpio.c
@@ -0,0 +1,979 @@
+/*
+ * ETRAX CRISv32 general port I/O device
+ *
+ * Copyright (c) 1999-2006 Axis Communications AB
+ *
+ * Authors: Bjorn Wesen (initial version)
+ * Ola Knutsson (LED handling)
+ * Johan Adolfsson (read/set directions, write, port G,
+ * port to ETRAX FS.
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/sched.h>
+#include <linux/slab.h>
+#include <linux/ioport.h>
+#include <linux/errno.h>
+#include <linux/kernel.h>
+#include <linux/fs.h>
+#include <linux/string.h>
+#include <linux/poll.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/spinlock.h>
+#include <linux/mutex.h>
+
+#include <asm/etraxgpio.h>
+#include <hwregs/reg_map.h>
+#include <hwregs/reg_rdwr.h>
+#include <hwregs/gio_defs.h>
+#include <hwregs/intr_vect_defs.h>
+#include <asm/io.h>
+#include <asm/irq.h>
+
+#ifdef CONFIG_ETRAX_VIRTUAL_GPIO
+#include "../i2c.h"
+
+#define VIRT_I2C_ADDR 0x40
+#endif
+
+/* The following gio ports on ETRAX FS is available:
+ * pa 8 bits, supports interrupts off, hi, low, set, posedge, negedge anyedge
+ * pb 18 bits
+ * pc 18 bits
+ * pd 18 bits
+ * pe 18 bits
+ * each port has a rw_px_dout, r_px_din and rw_px_oe register.
+ */
+
+#define GPIO_MAJOR 120 /* experimental MAJOR number */
+
+#define D(x)
+
+#if 0
+static int dp_cnt;
+#define DP(x) \
+ do { \
+ dp_cnt++; \
+ if (dp_cnt % 1000 == 0) \
+ x; \
+ } while (0)
+#else
+#define DP(x)
+#endif
+
+static DEFINE_MUTEX(gpio_mutex);
+static char gpio_name[] = "etrax gpio";
+
+#if 0
+static wait_queue_head_t *gpio_wq;
+#endif
+
+#ifdef CONFIG_ETRAX_VIRTUAL_GPIO
+static int virtual_gpio_ioctl(struct file *file, unsigned int cmd,
+ unsigned long arg);
+#endif
+static long gpio_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
+static ssize_t gpio_write(struct file *file, const char *buf, size_t count,
+ loff_t *off);
+static int gpio_open(struct inode *inode, struct file *filp);
+static int gpio_release(struct inode *inode, struct file *filp);
+static unsigned int gpio_poll(struct file *filp,
+ struct poll_table_struct *wait);
+
+/* private data per open() of this driver */
+
+struct gpio_private {
+ struct gpio_private *next;
+ /* The IO_CFG_WRITE_MODE_VALUE only support 8 bits: */
+ unsigned char clk_mask;
+ unsigned char data_mask;
+ unsigned char write_msb;
+ unsigned char pad1;
+ /* These fields are generic */
+ unsigned long highalarm, lowalarm;
+ wait_queue_head_t alarm_wq;
+ int minor;
+};
+
+/* linked list of alarms to check for */
+
+static struct gpio_private *alarmlist;
+
+static int gpio_some_alarms; /* Set if someone uses alarm */
+static unsigned long gpio_pa_high_alarms;
+static unsigned long gpio_pa_low_alarms;
+
+static DEFINE_SPINLOCK(alarm_lock);
+
+#define NUM_PORTS (GPIO_MINOR_LAST+1)
+#define GIO_REG_RD_ADDR(reg) \
+ (volatile unsigned long *)(regi_gio + REG_RD_ADDR_gio_##reg)
+#define GIO_REG_WR_ADDR(reg) \
+ (volatile unsigned long *)(regi_gio + REG_RD_ADDR_gio_##reg)
+unsigned long led_dummy;
+#ifdef CONFIG_ETRAX_VIRTUAL_GPIO
+static unsigned long virtual_dummy;
+static unsigned long virtual_rw_pv_oe = CONFIG_ETRAX_DEF_GIO_PV_OE;
+static unsigned short cached_virtual_gpio_read;
+#endif
+
+static volatile unsigned long *data_out[NUM_PORTS] = {
+ GIO_REG_WR_ADDR(rw_pa_dout),
+ GIO_REG_WR_ADDR(rw_pb_dout),
+ &led_dummy,
+ GIO_REG_WR_ADDR(rw_pc_dout),
+ GIO_REG_WR_ADDR(rw_pd_dout),
+ GIO_REG_WR_ADDR(rw_pe_dout),
+#ifdef CONFIG_ETRAX_VIRTUAL_GPIO
+ &virtual_dummy,
+#endif
+};
+
+static volatile unsigned long *data_in[NUM_PORTS] = {
+ GIO_REG_RD_ADDR(r_pa_din),
+ GIO_REG_RD_ADDR(r_pb_din),
+ &led_dummy,
+ GIO_REG_RD_ADDR(r_pc_din),
+ GIO_REG_RD_ADDR(r_pd_din),
+ GIO_REG_RD_ADDR(r_pe_din),
+#ifdef CONFIG_ETRAX_VIRTUAL_GPIO
+ &virtual_dummy,
+#endif
+};
+
+static unsigned long changeable_dir[NUM_PORTS] = {
+ CONFIG_ETRAX_PA_CHANGEABLE_DIR,
+ CONFIG_ETRAX_PB_CHANGEABLE_DIR,
+ 0,
+ CONFIG_ETRAX_PC_CHANGEABLE_DIR,
+ CONFIG_ETRAX_PD_CHANGEABLE_DIR,
+ CONFIG_ETRAX_PE_CHANGEABLE_DIR,
+#ifdef CONFIG_ETRAX_VIRTUAL_GPIO
+ CONFIG_ETRAX_PV_CHANGEABLE_DIR,
+#endif
+};
+
+static unsigned long changeable_bits[NUM_PORTS] = {
+ CONFIG_ETRAX_PA_CHANGEABLE_BITS,
+ CONFIG_ETRAX_PB_CHANGEABLE_BITS,
+ 0,
+ CONFIG_ETRAX_PC_CHANGEABLE_BITS,
+ CONFIG_ETRAX_PD_CHANGEABLE_BITS,
+ CONFIG_ETRAX_PE_CHANGEABLE_BITS,
+#ifdef CONFIG_ETRAX_VIRTUAL_GPIO
+ CONFIG_ETRAX_PV_CHANGEABLE_BITS,
+#endif
+};
+
+static volatile unsigned long *dir_oe[NUM_PORTS] = {
+ GIO_REG_WR_ADDR(rw_pa_oe),
+ GIO_REG_WR_ADDR(rw_pb_oe),
+ &led_dummy,
+ GIO_REG_WR_ADDR(rw_pc_oe),
+ GIO_REG_WR_ADDR(rw_pd_oe),
+ GIO_REG_WR_ADDR(rw_pe_oe),
+#ifdef CONFIG_ETRAX_VIRTUAL_GPIO
+ &virtual_rw_pv_oe,
+#endif
+};
+
+
+
+static unsigned int gpio_poll(struct file *file, struct poll_table_struct *wait)
+{
+ unsigned int mask = 0;
+ struct gpio_private *priv = file->private_data;
+ unsigned long data;
+ poll_wait(file, &priv->alarm_wq, wait);
+ if (priv->minor == GPIO_MINOR_A) {
+ reg_gio_rw_intr_cfg intr_cfg;
+ unsigned long tmp;
+ unsigned long flags;
+
+ local_irq_save(flags);
+ data = REG_TYPE_CONV(unsigned long, reg_gio_r_pa_din,
+ REG_RD(gio, regi_gio, r_pa_din));
+ /* PA has support for interrupt
+ * lets activate high for those low and with highalarm set
+ */
+ intr_cfg = REG_RD(gio, regi_gio, rw_intr_cfg);
+
+ tmp = ~data & priv->highalarm & 0xFF;
+ if (tmp & (1 << 0))
+ intr_cfg.pa0 = regk_gio_hi;
+ if (tmp & (1 << 1))
+ intr_cfg.pa1 = regk_gio_hi;
+ if (tmp & (1 << 2))
+ intr_cfg.pa2 = regk_gio_hi;
+ if (tmp & (1 << 3))
+ intr_cfg.pa3 = regk_gio_hi;
+ if (tmp & (1 << 4))
+ intr_cfg.pa4 = regk_gio_hi;
+ if (tmp & (1 << 5))
+ intr_cfg.pa5 = regk_gio_hi;
+ if (tmp & (1 << 6))
+ intr_cfg.pa6 = regk_gio_hi;
+ if (tmp & (1 << 7))
+ intr_cfg.pa7 = regk_gio_hi;
+ /*
+ * lets activate low for those high and with lowalarm set
+ */
+ tmp = data & priv->lowalarm & 0xFF;
+ if (tmp & (1 << 0))
+ intr_cfg.pa0 = regk_gio_lo;
+ if (tmp & (1 << 1))
+ intr_cfg.pa1 = regk_gio_lo;
+ if (tmp & (1 << 2))
+ intr_cfg.pa2 = regk_gio_lo;
+ if (tmp & (1 << 3))
+ intr_cfg.pa3 = regk_gio_lo;
+ if (tmp & (1 << 4))
+ intr_cfg.pa4 = regk_gio_lo;
+ if (tmp & (1 << 5))
+ intr_cfg.pa5 = regk_gio_lo;
+ if (tmp & (1 << 6))
+ intr_cfg.pa6 = regk_gio_lo;
+ if (tmp & (1 << 7))
+ intr_cfg.pa7 = regk_gio_lo;
+
+ REG_WR(gio, regi_gio, rw_intr_cfg, intr_cfg);
+ local_irq_restore(flags);
+ } else if (priv->minor <= GPIO_MINOR_E)
+ data = *data_in[priv->minor];
+ else
+ return 0;
+
+ if ((data & priv->highalarm) || (~data & priv->lowalarm))
+ mask = POLLIN|POLLRDNORM;
+
+ DP(printk(KERN_DEBUG "gpio_poll ready: mask 0x%08X\n", mask));
+ return mask;
+}
+
+int etrax_gpio_wake_up_check(void)
+{
+ struct gpio_private *priv;
+ unsigned long data = 0;
+ unsigned long flags;
+ int ret = 0;
+ spin_lock_irqsave(&alarm_lock, flags);
+ priv = alarmlist;
+ while (priv) {
+#ifdef CONFIG_ETRAX_VIRTUAL_GPIO
+ if (priv->minor == GPIO_MINOR_V)
+ data = (unsigned long)cached_virtual_gpio_read;
+ else {
+ data = *data_in[priv->minor];
+ if (priv->minor == GPIO_MINOR_A)
+ priv->lowalarm |= (1 << CONFIG_ETRAX_VIRTUAL_GPIO_INTERRUPT_PA_PIN);
+ }
+#else
+ data = *data_in[priv->minor];
+#endif
+ if ((data & priv->highalarm) ||
+ (~data & priv->lowalarm)) {
+ DP(printk(KERN_DEBUG
+ "etrax_gpio_wake_up_check %i\n", priv->minor));
+ wake_up_interruptible(&priv->alarm_wq);
+ ret = 1;
+ }
+ priv = priv->next;
+ }
+ spin_unlock_irqrestore(&alarm_lock, flags);
+ return ret;
+}
+
+static irqreturn_t
+gpio_poll_timer_interrupt(int irq, void *dev_id)
+{
+ if (gpio_some_alarms)
+ return IRQ_RETVAL(etrax_gpio_wake_up_check());
+ return IRQ_NONE;
+}
+
+static irqreturn_t
+gpio_pa_interrupt(int irq, void *dev_id)
+{
+ reg_gio_rw_intr_mask intr_mask;
+ reg_gio_r_masked_intr masked_intr;
+ reg_gio_rw_ack_intr ack_intr;
+ unsigned long tmp;
+ unsigned long tmp2;
+#ifdef CONFIG_ETRAX_VIRTUAL_GPIO
+ unsigned char enable_gpiov_ack = 0;
+#endif
+
+ /* Find what PA interrupts are active */
+ masked_intr = REG_RD(gio, regi_gio, r_masked_intr);
+ tmp = REG_TYPE_CONV(unsigned long, reg_gio_r_masked_intr, masked_intr);
+
+ /* Find those that we have enabled */
+ spin_lock(&alarm_lock);
+ tmp &= (gpio_pa_high_alarms | gpio_pa_low_alarms);
+ spin_unlock(&alarm_lock);
+
+#ifdef CONFIG_ETRAX_VIRTUAL_GPIO
+ /* Something changed on virtual GPIO. Interrupt is acked by
+ * reading the device.
+ */
+ if (tmp & (1 << CONFIG_ETRAX_VIRTUAL_GPIO_INTERRUPT_PA_PIN)) {
+ i2c_read(VIRT_I2C_ADDR, (void *)&cached_virtual_gpio_read,
+ sizeof(cached_virtual_gpio_read));
+ enable_gpiov_ack = 1;
+ }
+#endif
+
+ /* Ack them */
+ ack_intr = REG_TYPE_CONV(reg_gio_rw_ack_intr, unsigned long, tmp);
+ REG_WR(gio, regi_gio, rw_ack_intr, ack_intr);
+
+ /* Disable those interrupts.. */
+ intr_mask = REG_RD(gio, regi_gio, rw_intr_mask);
+ tmp2 = REG_TYPE_CONV(unsigned long, reg_gio_rw_intr_mask, intr_mask);
+ tmp2 &= ~tmp;
+#ifdef CONFIG_ETRAX_VIRTUAL_GPIO
+ /* Do not disable interrupt on virtual GPIO. Changes on virtual
+ * pins are only noticed by an interrupt.
+ */
+ if (enable_gpiov_ack)
+ tmp2 |= (1 << CONFIG_ETRAX_VIRTUAL_GPIO_INTERRUPT_PA_PIN);
+#endif
+ intr_mask = REG_TYPE_CONV(reg_gio_rw_intr_mask, unsigned long, tmp2);
+ REG_WR(gio, regi_gio, rw_intr_mask, intr_mask);
+
+ if (gpio_some_alarms)
+ return IRQ_RETVAL(etrax_gpio_wake_up_check());
+ return IRQ_NONE;
+}
+
+
+static ssize_t gpio_write(struct file *file, const char *buf, size_t count,
+ loff_t *off)
+{
+ struct gpio_private *priv = file->private_data;
+ unsigned char data, clk_mask, data_mask, write_msb;
+ unsigned long flags;
+ unsigned long shadow;
+ volatile unsigned long *port;
+ ssize_t retval = count;
+ /* Only bits 0-7 may be used for write operations but allow all
+ devices except leds... */
+#ifdef CONFIG_ETRAX_VIRTUAL_GPIO
+ if (priv->minor == GPIO_MINOR_V)
+ return -EFAULT;
+#endif
+ if (priv->minor == GPIO_MINOR_LEDS)
+ return -EFAULT;
+
+ if (!access_ok(VERIFY_READ, buf, count))
+ return -EFAULT;
+ clk_mask = priv->clk_mask;
+ data_mask = priv->data_mask;
+ /* It must have been configured using the IO_CFG_WRITE_MODE */
+ /* Perhaps a better error code? */
+ if (clk_mask == 0 || data_mask == 0)
+ return -EPERM;
+ write_msb = priv->write_msb;
+ D(printk(KERN_DEBUG "gpio_write: %lu to data 0x%02X clk 0x%02X "
+ "msb: %i\n", count, data_mask, clk_mask, write_msb));
+ port = data_out[priv->minor];
+
+ while (count--) {
+ int i;
+ data = *buf++;
+ if (priv->write_msb) {
+ for (i = 7; i >= 0; i--) {
+ local_irq_save(flags);
+ shadow = *port;
+ *port = shadow &= ~clk_mask;
+ if (data & 1<<i)
+ *port = shadow |= data_mask;
+ else
+ *port = shadow &= ~data_mask;
+ /* For FPGA: min 5.0ns (DCC) before CCLK high */
+ *port = shadow |= clk_mask;
+ local_irq_restore(flags);
+ }
+ } else {
+ for (i = 0; i <= 7; i++) {
+ local_irq_save(flags);
+ shadow = *port;
+ *port = shadow &= ~clk_mask;
+ if (data & 1<<i)
+ *port = shadow |= data_mask;
+ else
+ *port = shadow &= ~data_mask;
+ /* For FPGA: min 5.0ns (DCC) before CCLK high */
+ *port = shadow |= clk_mask;
+ local_irq_restore(flags);
+ }
+ }
+ }
+ return retval;
+}
+
+
+
+static int
+gpio_open(struct inode *inode, struct file *filp)
+{
+ struct gpio_private *priv;
+ int p = iminor(inode);
+
+ if (p > GPIO_MINOR_LAST)
+ return -EINVAL;
+
+ priv = kmalloc(sizeof(struct gpio_private), GFP_KERNEL);
+ if (!priv)
+ return -ENOMEM;
+
+ mutex_lock(&gpio_mutex);
+ memset(priv, 0, sizeof(*priv));
+
+ priv->minor = p;
+
+ /* initialize the io/alarm struct */
+
+ priv->clk_mask = 0;
+ priv->data_mask = 0;
+ priv->highalarm = 0;
+ priv->lowalarm = 0;
+ init_waitqueue_head(&priv->alarm_wq);
+
+ filp->private_data = (void *)priv;
+
+ /* link it into our alarmlist */
+ spin_lock_irq(&alarm_lock);
+ priv->next = alarmlist;
+ alarmlist = priv;
+ spin_unlock_irq(&alarm_lock);
+
+ mutex_unlock(&gpio_mutex);
+ return 0;
+}
+
+static int
+gpio_release(struct inode *inode, struct file *filp)
+{
+ struct gpio_private *p;
+ struct gpio_private *todel;
+ /* local copies while updating them: */
+ unsigned long a_high, a_low;
+ unsigned long some_alarms;
+
+ /* unlink from alarmlist and free the private structure */
+
+ spin_lock_irq(&alarm_lock);
+ p = alarmlist;
+ todel = filp->private_data;
+
+ if (p == todel) {
+ alarmlist = todel->next;
+ } else {
+ while (p->next != todel)
+ p = p->next;
+ p->next = todel->next;
+ }
+
+ kfree(todel);
+ /* Check if there are still any alarms set */
+ p = alarmlist;
+ some_alarms = 0;
+ a_high = 0;
+ a_low = 0;
+ while (p) {
+ if (p->minor == GPIO_MINOR_A) {
+#ifdef CONFIG_ETRAX_VIRTUAL_GPIO
+ p->lowalarm |= (1 << CONFIG_ETRAX_VIRTUAL_GPIO_INTERRUPT_PA_PIN);
+#endif
+ a_high |= p->highalarm;
+ a_low |= p->lowalarm;
+ }
+
+ if (p->highalarm | p->lowalarm)
+ some_alarms = 1;
+ p = p->next;
+ }
+
+#ifdef CONFIG_ETRAX_VIRTUAL_GPIO
+ /* Variables 'some_alarms' and 'a_low' needs to be set here again
+ * to ensure that interrupt for virtual GPIO is handled.
+ */
+ some_alarms = 1;
+ a_low |= (1 << CONFIG_ETRAX_VIRTUAL_GPIO_INTERRUPT_PA_PIN);
+#endif
+
+ gpio_some_alarms = some_alarms;
+ gpio_pa_high_alarms = a_high;
+ gpio_pa_low_alarms = a_low;
+ spin_unlock_irq(&alarm_lock);
+
+ return 0;
+}
+
+/* Main device API. ioctl's to read/set/clear bits, as well as to
+ * set alarms to wait for using a subsequent select().
+ */
+
+inline unsigned long setget_input(struct gpio_private *priv, unsigned long arg)
+{
+ /* Set direction 0=unchanged 1=input,
+ * return mask with 1=input
+ */
+ unsigned long flags;
+ unsigned long dir_shadow;
+
+ local_irq_save(flags);
+ dir_shadow = *dir_oe[priv->minor];
+ dir_shadow &= ~(arg & changeable_dir[priv->minor]);
+ *dir_oe[priv->minor] = dir_shadow;
+ local_irq_restore(flags);
+
+ if (priv->minor == GPIO_MINOR_A)
+ dir_shadow ^= 0xFF; /* Only 8 bits */
+#ifdef CONFIG_ETRAX_VIRTUAL_GPIO
+ else if (priv->minor == GPIO_MINOR_V)
+ dir_shadow ^= 0xFFFF; /* Only 16 bits */
+#endif
+ else
+ dir_shadow ^= 0x3FFFF; /* Only 18 bits */
+ return dir_shadow;
+
+} /* setget_input */
+
+inline unsigned long setget_output(struct gpio_private *priv, unsigned long arg)
+{
+ unsigned long flags;
+ unsigned long dir_shadow;
+
+ local_irq_save(flags);
+ dir_shadow = *dir_oe[priv->minor];
+ dir_shadow |= (arg & changeable_dir[priv->minor]);
+ *dir_oe[priv->minor] = dir_shadow;
+ local_irq_restore(flags);
+ return dir_shadow;
+} /* setget_output */
+
+static int gpio_leds_ioctl(unsigned int cmd, unsigned long arg);
+
+static int
+gpio_ioctl_unlocked(struct file *file, unsigned int cmd, unsigned long arg)
+{
+ unsigned long flags;
+ unsigned long val;
+ unsigned long shadow;
+ struct gpio_private *priv = file->private_data;
+ if (_IOC_TYPE(cmd) != ETRAXGPIO_IOCTYPE)
+ return -EINVAL;
+
+#ifdef CONFIG_ETRAX_VIRTUAL_GPIO
+ if (priv->minor == GPIO_MINOR_V)
+ return virtual_gpio_ioctl(file, cmd, arg);
+#endif
+
+ switch (_IOC_NR(cmd)) {
+ case IO_READBITS: /* Use IO_READ_INBITS and IO_READ_OUTBITS instead */
+ /* Read the port. */
+ return *data_in[priv->minor];
+ break;
+ case IO_SETBITS:
+ local_irq_save(flags);
+ /* Set changeable bits with a 1 in arg. */
+ shadow = *data_out[priv->minor];
+ shadow |= (arg & changeable_bits[priv->minor]);
+ *data_out[priv->minor] = shadow;
+ local_irq_restore(flags);
+ break;
+ case IO_CLRBITS:
+ local_irq_save(flags);
+ /* Clear changeable bits with a 1 in arg. */
+ shadow = *data_out[priv->minor];
+ shadow &= ~(arg & changeable_bits[priv->minor]);
+ *data_out[priv->minor] = shadow;
+ local_irq_restore(flags);
+ break;
+ case IO_HIGHALARM:
+ /* Set alarm when bits with 1 in arg go high. */
+ priv->highalarm |= arg;
+ spin_lock_irqsave(&alarm_lock, flags);
+ gpio_some_alarms = 1;
+ if (priv->minor == GPIO_MINOR_A)
+ gpio_pa_high_alarms |= arg;
+ spin_unlock_irqrestore(&alarm_lock, flags);
+ break;
+ case IO_LOWALARM:
+ /* Set alarm when bits with 1 in arg go low. */
+ priv->lowalarm |= arg;
+ spin_lock_irqsave(&alarm_lock, flags);
+ gpio_some_alarms = 1;
+ if (priv->minor == GPIO_MINOR_A)
+ gpio_pa_low_alarms |= arg;
+ spin_unlock_irqrestore(&alarm_lock, flags);
+ break;
+ case IO_CLRALARM:
+ /* Clear alarm for bits with 1 in arg. */
+ priv->highalarm &= ~arg;
+ priv->lowalarm &= ~arg;
+ spin_lock_irqsave(&alarm_lock, flags);
+ if (priv->minor == GPIO_MINOR_A) {
+ if (gpio_pa_high_alarms & arg ||
+ gpio_pa_low_alarms & arg)
+ /* Must update the gpio_pa_*alarms masks */
+ ;
+ }
+ spin_unlock_irqrestore(&alarm_lock, flags);
+ break;
+ case IO_READDIR: /* Use IO_SETGET_INPUT/OUTPUT instead! */
+ /* Read direction 0=input 1=output */
+ return *dir_oe[priv->minor];
+ case IO_SETINPUT: /* Use IO_SETGET_INPUT instead! */
+ /* Set direction 0=unchanged 1=input,
+ * return mask with 1=input
+ */
+ return setget_input(priv, arg);
+ break;
+ case IO_SETOUTPUT: /* Use IO_SETGET_OUTPUT instead! */
+ /* Set direction 0=unchanged 1=output,
+ * return mask with 1=output
+ */
+ return setget_output(priv, arg);
+
+ case IO_CFG_WRITE_MODE:
+ {
+ unsigned long dir_shadow;
+ dir_shadow = *dir_oe[priv->minor];
+
+ priv->clk_mask = arg & 0xFF;
+ priv->data_mask = (arg >> 8) & 0xFF;
+ priv->write_msb = (arg >> 16) & 0x01;
+ /* Check if we're allowed to change the bits and
+ * the direction is correct
+ */
+ if (!((priv->clk_mask & changeable_bits[priv->minor]) &&
+ (priv->data_mask & changeable_bits[priv->minor]) &&
+ (priv->clk_mask & dir_shadow) &&
+ (priv->data_mask & dir_shadow))) {
+ priv->clk_mask = 0;
+ priv->data_mask = 0;
+ return -EPERM;
+ }
+ break;
+ }
+ case IO_READ_INBITS:
+ /* *arg is result of reading the input pins */
+ val = *data_in[priv->minor];
+ if (copy_to_user((unsigned long *)arg, &val, sizeof(val)))
+ return -EFAULT;
+ return 0;
+ break;
+ case IO_READ_OUTBITS:
+ /* *arg is result of reading the output shadow */
+ val = *data_out[priv->minor];
+ if (copy_to_user((unsigned long *)arg, &val, sizeof(val)))
+ return -EFAULT;
+ break;
+ case IO_SETGET_INPUT:
+ /* bits set in *arg is set to input,
+ * *arg updated with current input pins.
+ */
+ if (copy_from_user(&val, (unsigned long *)arg, sizeof(val)))
+ return -EFAULT;
+ val = setget_input(priv, val);
+ if (copy_to_user((unsigned long *)arg, &val, sizeof(val)))
+ return -EFAULT;
+ break;
+ case IO_SETGET_OUTPUT:
+ /* bits set in *arg is set to output,
+ * *arg updated with current output pins.
+ */
+ if (copy_from_user(&val, (unsigned long *)arg, sizeof(val)))
+ return -EFAULT;
+ val = setget_output(priv, val);
+ if (copy_to_user((unsigned long *)arg, &val, sizeof(val)))
+ return -EFAULT;
+ break;
+ default:
+ if (priv->minor == GPIO_MINOR_LEDS)
+ return gpio_leds_ioctl(cmd, arg);
+ else
+ return -EINVAL;
+ } /* switch */
+
+ return 0;
+}
+
+static long gpio_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
+{
+ long ret;
+
+ mutex_lock(&gpio_mutex);
+ ret = gpio_ioctl_unlocked(file, cmd, arg);
+ mutex_unlock(&gpio_mutex);
+
+ return ret;
+}
+
+#ifdef CONFIG_ETRAX_VIRTUAL_GPIO
+static int
+virtual_gpio_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
+{
+ unsigned long flags;
+ unsigned short val;
+ unsigned short shadow;
+ struct gpio_private *priv = file->private_data;
+
+ switch (_IOC_NR(cmd)) {
+ case IO_SETBITS:
+ local_irq_save(flags);
+ /* Set changeable bits with a 1 in arg. */
+ i2c_read(VIRT_I2C_ADDR, (void *)&shadow, sizeof(shadow));
+ shadow |= ~*dir_oe[priv->minor];
+ shadow |= (arg & changeable_bits[priv->minor]);
+ i2c_write(VIRT_I2C_ADDR, (void *)&shadow, sizeof(shadow));
+ local_irq_restore(flags);
+ break;
+ case IO_CLRBITS:
+ local_irq_save(flags);
+ /* Clear changeable bits with a 1 in arg. */
+ i2c_read(VIRT_I2C_ADDR, (void *)&shadow, sizeof(shadow));
+ shadow |= ~*dir_oe[priv->minor];
+ shadow &= ~(arg & changeable_bits[priv->minor]);
+ i2c_write(VIRT_I2C_ADDR, (void *)&shadow, sizeof(shadow));
+ local_irq_restore(flags);
+ break;
+ case IO_HIGHALARM:
+ /* Set alarm when bits with 1 in arg go high. */
+ priv->highalarm |= arg;
+ spin_lock(&alarm_lock);
+ gpio_some_alarms = 1;
+ spin_unlock(&alarm_lock);
+ break;
+ case IO_LOWALARM:
+ /* Set alarm when bits with 1 in arg go low. */
+ priv->lowalarm |= arg;
+ spin_lock(&alarm_lock);
+ gpio_some_alarms = 1;
+ spin_unlock(&alarm_lock);
+ break;
+ case IO_CLRALARM:
+ /* Clear alarm for bits with 1 in arg. */
+ priv->highalarm &= ~arg;
+ priv->lowalarm &= ~arg;
+ spin_lock(&alarm_lock);
+ spin_unlock(&alarm_lock);
+ break;
+ case IO_CFG_WRITE_MODE:
+ {
+ unsigned long dir_shadow;
+ dir_shadow = *dir_oe[priv->minor];
+
+ priv->clk_mask = arg & 0xFF;
+ priv->data_mask = (arg >> 8) & 0xFF;
+ priv->write_msb = (arg >> 16) & 0x01;
+ /* Check if we're allowed to change the bits and
+ * the direction is correct
+ */
+ if (!((priv->clk_mask & changeable_bits[priv->minor]) &&
+ (priv->data_mask & changeable_bits[priv->minor]) &&
+ (priv->clk_mask & dir_shadow) &&
+ (priv->data_mask & dir_shadow))) {
+ priv->clk_mask = 0;
+ priv->data_mask = 0;
+ return -EPERM;
+ }
+ break;
+ }
+ case IO_READ_INBITS:
+ /* *arg is result of reading the input pins */
+ val = cached_virtual_gpio_read;
+ val &= ~*dir_oe[priv->minor];
+ if (copy_to_user((unsigned long *)arg, &val, sizeof(val)))
+ return -EFAULT;
+ return 0;
+ break;
+ case IO_READ_OUTBITS:
+ /* *arg is result of reading the output shadow */
+ i2c_read(VIRT_I2C_ADDR, (void *)&val, sizeof(val));
+ val &= *dir_oe[priv->minor];
+ if (copy_to_user((unsigned long *)arg, &val, sizeof(val)))
+ return -EFAULT;
+ break;
+ case IO_SETGET_INPUT:
+ {
+ /* bits set in *arg is set to input,
+ * *arg updated with current input pins.
+ */
+ unsigned short input_mask = ~*dir_oe[priv->minor];
+ if (copy_from_user(&val, (unsigned long *)arg, sizeof(val)))
+ return -EFAULT;
+ val = setget_input(priv, val);
+ if (copy_to_user((unsigned long *)arg, &val, sizeof(val)))
+ return -EFAULT;
+ if ((input_mask & val) != input_mask) {
+ /* Input pins changed. All ports desired as input
+ * should be set to logic 1.
+ */
+ unsigned short change = input_mask ^ val;
+ i2c_read(VIRT_I2C_ADDR, (void *)&shadow,
+ sizeof(shadow));
+ shadow &= ~change;
+ shadow |= val;
+ i2c_write(VIRT_I2C_ADDR, (void *)&shadow,
+ sizeof(shadow));
+ }
+ break;
+ }
+ case IO_SETGET_OUTPUT:
+ /* bits set in *arg is set to output,
+ * *arg updated with current output pins.
+ */
+ if (copy_from_user(&val, (unsigned long *)arg, sizeof(val)))
+ return -EFAULT;
+ val = setget_output(priv, val);
+ if (copy_to_user((unsigned long *)arg, &val, sizeof(val)))
+ return -EFAULT;
+ break;
+ default:
+ return -EINVAL;
+ } /* switch */
+ return 0;
+}
+#endif /* CONFIG_ETRAX_VIRTUAL_GPIO */
+
+static int
+gpio_leds_ioctl(unsigned int cmd, unsigned long arg)
+{
+ unsigned char green;
+ unsigned char red;
+
+ switch (_IOC_NR(cmd)) {
+ case IO_LEDACTIVE_SET:
+ green = ((unsigned char) arg) & 1;
+ red = (((unsigned char) arg) >> 1) & 1;
+ CRIS_LED_ACTIVE_SET_G(green);
+ CRIS_LED_ACTIVE_SET_R(red);
+ break;
+
+ default:
+ return -EINVAL;
+ } /* switch */
+
+ return 0;
+}
+
+static const struct file_operations gpio_fops = {
+ .owner = THIS_MODULE,
+ .poll = gpio_poll,
+ .unlocked_ioctl = gpio_ioctl,
+ .write = gpio_write,
+ .open = gpio_open,
+ .release = gpio_release,
+ .llseek = noop_llseek,
+};
+
+#ifdef CONFIG_ETRAX_VIRTUAL_GPIO
+static void
+virtual_gpio_init(void)
+{
+ reg_gio_rw_intr_cfg intr_cfg;
+ reg_gio_rw_intr_mask intr_mask;
+ unsigned short shadow;
+
+ shadow = ~virtual_rw_pv_oe; /* Input ports should be set to logic 1 */
+ shadow |= CONFIG_ETRAX_DEF_GIO_PV_OUT;
+ i2c_write(VIRT_I2C_ADDR, (void *)&shadow, sizeof(shadow));
+
+ /* Set interrupt mask and on what state the interrupt shall trigger.
+ * For virtual gpio the interrupt shall trigger on logic '0'.
+ */
+ intr_cfg = REG_RD(gio, regi_gio, rw_intr_cfg);
+ intr_mask = REG_RD(gio, regi_gio, rw_intr_mask);
+
+ switch (CONFIG_ETRAX_VIRTUAL_GPIO_INTERRUPT_PA_PIN) {
+ case 0:
+ intr_cfg.pa0 = regk_gio_lo;
+ intr_mask.pa0 = regk_gio_yes;
+ break;
+ case 1:
+ intr_cfg.pa1 = regk_gio_lo;
+ intr_mask.pa1 = regk_gio_yes;
+ break;
+ case 2:
+ intr_cfg.pa2 = regk_gio_lo;
+ intr_mask.pa2 = regk_gio_yes;
+ break;
+ case 3:
+ intr_cfg.pa3 = regk_gio_lo;
+ intr_mask.pa3 = regk_gio_yes;
+ break;
+ case 4:
+ intr_cfg.pa4 = regk_gio_lo;
+ intr_mask.pa4 = regk_gio_yes;
+ break;
+ case 5:
+ intr_cfg.pa5 = regk_gio_lo;
+ intr_mask.pa5 = regk_gio_yes;
+ break;
+ case 6:
+ intr_cfg.pa6 = regk_gio_lo;
+ intr_mask.pa6 = regk_gio_yes;
+ break;
+ case 7:
+ intr_cfg.pa7 = regk_gio_lo;
+ intr_mask.pa7 = regk_gio_yes;
+ break;
+ }
+
+ REG_WR(gio, regi_gio, rw_intr_cfg, intr_cfg);
+ REG_WR(gio, regi_gio, rw_intr_mask, intr_mask);
+
+ gpio_pa_low_alarms |= (1 << CONFIG_ETRAX_VIRTUAL_GPIO_INTERRUPT_PA_PIN);
+ gpio_some_alarms = 1;
+}
+#endif
+
+/* main driver initialization routine, called from mem.c */
+
+static __init int
+gpio_init(void)
+{
+ int res;
+
+ /* do the formalities */
+
+ res = register_chrdev(GPIO_MAJOR, gpio_name, &gpio_fops);
+ if (res < 0) {
+ printk(KERN_ERR "gpio: couldn't get a major number.\n");
+ return res;
+ }
+
+ /* Clear all leds */
+ CRIS_LED_NETWORK_GRP0_SET(0);
+ CRIS_LED_NETWORK_GRP1_SET(0);
+ CRIS_LED_ACTIVE_SET(0);
+ CRIS_LED_DISK_READ(0);
+ CRIS_LED_DISK_WRITE(0);
+
+ printk(KERN_INFO "ETRAX FS GPIO driver v2.5, (c) 2003-2007 "
+ "Axis Communications AB\n");
+ /* We call etrax_gpio_wake_up_check() from timer interrupt */
+ if (request_irq(TIMER0_INTR_VECT, gpio_poll_timer_interrupt,
+ IRQF_SHARED, "gpio poll", &alarmlist))
+ printk(KERN_ERR "timer0 irq for gpio\n");
+
+ if (request_irq(GIO_INTR_VECT, gpio_pa_interrupt,
+ IRQF_SHARED, "gpio PA", &alarmlist))
+ printk(KERN_ERR "PA irq for gpio\n");
+
+#ifdef CONFIG_ETRAX_VIRTUAL_GPIO
+ virtual_gpio_init();
+#endif
+
+ return res;
+}
+
+/* this makes sure that gpio_init is called during kernel boot */
+
+module_init(gpio_init);
diff --git a/kernel/arch/cris/arch-v32/drivers/mach-fs/nandflash.c b/kernel/arch/cris/arch-v32/drivers/mach-fs/nandflash.c
new file mode 100644
index 000000000..e03238454
--- /dev/null
+++ b/kernel/arch/cris/arch-v32/drivers/mach-fs/nandflash.c
@@ -0,0 +1,174 @@
+/*
+ * arch/cris/arch-v32/drivers/nandflash.c
+ *
+ * Copyright (c) 2004
+ *
+ * Derived from drivers/mtd/nand/spia.c
+ * Copyright (C) 2000 Steven J. Hill (sjhill@realitydiluted.com)
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ */
+
+#include <linux/slab.h>
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/mtd/mtd.h>
+#include <linux/mtd/nand.h>
+#include <linux/mtd/partitions.h>
+#include <arch/memmap.h>
+#include <hwregs/reg_map.h>
+#include <hwregs/reg_rdwr.h>
+#include <hwregs/gio_defs.h>
+#include <hwregs/bif_core_defs.h>
+#include <asm/io.h>
+
+#define CE_BIT 4
+#define CLE_BIT 5
+#define ALE_BIT 6
+#define BY_BIT 7
+
+struct mtd_info_wrapper {
+ struct mtd_info info;
+ struct nand_chip chip;
+};
+
+/* Bitmask for control pins */
+#define PIN_BITMASK ((1 << CE_BIT) | (1 << CLE_BIT) | (1 << ALE_BIT))
+
+/* Bitmask for mtd nand control bits */
+#define CTRL_BITMASK (NAND_NCE | NAND_CLE | NAND_ALE)
+
+
+static struct mtd_info *crisv32_mtd;
+/*
+ * hardware specific access to control-lines
+ */
+static void crisv32_hwcontrol(struct mtd_info *mtd, int cmd,
+ unsigned int ctrl)
+{
+ unsigned long flags;
+ reg_gio_rw_pa_dout dout;
+ struct nand_chip *this = mtd->priv;
+
+ local_irq_save(flags);
+
+ /* control bits change */
+ if (ctrl & NAND_CTRL_CHANGE) {
+ dout = REG_RD(gio, regi_gio, rw_pa_dout);
+ dout.data &= ~PIN_BITMASK;
+
+#if (CE_BIT == 4 && NAND_NCE == 1 && \
+ CLE_BIT == 5 && NAND_CLE == 2 && \
+ ALE_BIT == 6 && NAND_ALE == 4)
+ /* Pins in same order as control bits, but shifted.
+ * Optimize for this case; works for 2.6.18 */
+ dout.data |= ((ctrl & CTRL_BITMASK) ^ NAND_NCE) << CE_BIT;
+#else
+ /* the slow way */
+ if (!(ctrl & NAND_NCE))
+ dout.data |= (1 << CE_BIT);
+ if (ctrl & NAND_CLE)
+ dout.data |= (1 << CLE_BIT);
+ if (ctrl & NAND_ALE)
+ dout.data |= (1 << ALE_BIT);
+#endif
+ REG_WR(gio, regi_gio, rw_pa_dout, dout);
+ }
+
+ /* command to chip */
+ if (cmd != NAND_CMD_NONE)
+ writeb(cmd, this->IO_ADDR_W);
+
+ local_irq_restore(flags);
+}
+
+/*
+* read device ready pin
+*/
+static int crisv32_device_ready(struct mtd_info *mtd)
+{
+ reg_gio_r_pa_din din = REG_RD(gio, regi_gio, r_pa_din);
+ return ((din.data & (1 << BY_BIT)) >> BY_BIT);
+}
+
+/*
+ * Main initialization routine
+ */
+struct mtd_info *__init crisv32_nand_flash_probe(void)
+{
+ void __iomem *read_cs;
+ void __iomem *write_cs;
+
+ reg_bif_core_rw_grp3_cfg bif_cfg = REG_RD(bif_core, regi_bif_core,
+ rw_grp3_cfg);
+ reg_gio_rw_pa_oe pa_oe = REG_RD(gio, regi_gio, rw_pa_oe);
+ struct mtd_info_wrapper *wrapper;
+ struct nand_chip *this;
+ int err = 0;
+
+ /* Allocate memory for MTD device structure and private data */
+ wrapper = kzalloc(sizeof(struct mtd_info_wrapper), GFP_KERNEL);
+ if (!wrapper) {
+ printk(KERN_ERR "Unable to allocate CRISv32 NAND MTD "
+ "device structure.\n");
+ err = -ENOMEM;
+ return NULL;
+ }
+
+ read_cs = ioremap(MEM_CSP0_START | MEM_NON_CACHEABLE, 8192);
+ write_cs = ioremap(MEM_CSP1_START | MEM_NON_CACHEABLE, 8192);
+
+ if (!read_cs || !write_cs) {
+ printk(KERN_ERR "CRISv32 NAND ioremap failed\n");
+ err = -EIO;
+ goto out_mtd;
+ }
+
+ /* Get pointer to private data */
+ this = &wrapper->chip;
+ crisv32_mtd = &wrapper->info;
+
+ pa_oe.oe |= 1 << CE_BIT;
+ pa_oe.oe |= 1 << ALE_BIT;
+ pa_oe.oe |= 1 << CLE_BIT;
+ pa_oe.oe &= ~(1 << BY_BIT);
+ REG_WR(gio, regi_gio, rw_pa_oe, pa_oe);
+
+ bif_cfg.gated_csp0 = regk_bif_core_rd;
+ bif_cfg.gated_csp1 = regk_bif_core_wr;
+ REG_WR(bif_core, regi_bif_core, rw_grp3_cfg, bif_cfg);
+
+ /* Link the private data with the MTD structure */
+ crisv32_mtd->priv = this;
+
+ /* Set address of NAND IO lines */
+ this->IO_ADDR_R = read_cs;
+ this->IO_ADDR_W = write_cs;
+ this->cmd_ctrl = crisv32_hwcontrol;
+ this->dev_ready = crisv32_device_ready;
+ /* 20 us command delay time */
+ this->chip_delay = 20;
+ this->ecc.mode = NAND_ECC_SOFT;
+
+ /* Enable the following for a flash based bad block table */
+ /* this->bbt_options = NAND_BBT_USE_FLASH; */
+
+ /* Scan to find existence of the device */
+ if (nand_scan(crisv32_mtd, 1)) {
+ err = -ENXIO;
+ goto out_ior;
+ }
+
+ return crisv32_mtd;
+
+out_ior:
+ iounmap((void *)read_cs);
+ iounmap((void *)write_cs);
+out_mtd:
+ kfree(wrapper);
+ return NULL;
+}
+
diff --git a/kernel/arch/cris/arch-v32/drivers/pci/Makefile b/kernel/arch/cris/arch-v32/drivers/pci/Makefile
new file mode 100644
index 000000000..bff7482f2
--- /dev/null
+++ b/kernel/arch/cris/arch-v32/drivers/pci/Makefile
@@ -0,0 +1,5 @@
+#
+# Makefile for Etrax cardbus driver
+#
+
+obj-$(CONFIG_ETRAX_CARDBUS) += bios.o dma.o
diff --git a/kernel/arch/cris/arch-v32/drivers/pci/bios.c b/kernel/arch/cris/arch-v32/drivers/pci/bios.c
new file mode 100644
index 000000000..64a5fb937
--- /dev/null
+++ b/kernel/arch/cris/arch-v32/drivers/pci/bios.c
@@ -0,0 +1,99 @@
+#include <linux/pci.h>
+#include <linux/kernel.h>
+#include <arch/hwregs/intr_vect.h>
+
+void pcibios_fixup_bus(struct pci_bus *b)
+{
+}
+
+void pcibios_set_master(struct pci_dev *dev)
+{
+ u8 lat;
+ pci_read_config_byte(dev, PCI_LATENCY_TIMER, &lat);
+ printk(KERN_DEBUG "PCI: Setting latency timer of device %s to %d\n", pci_name(dev), lat);
+ pci_write_config_byte(dev, PCI_LATENCY_TIMER, lat);
+}
+
+int pci_mmap_page_range(struct pci_dev *dev, struct vm_area_struct *vma,
+ enum pci_mmap_state mmap_state, int write_combine)
+{
+ unsigned long prot;
+
+ /* Leave vm_pgoff as-is, the PCI space address is the physical
+ * address on this platform.
+ */
+ prot = pgprot_val(vma->vm_page_prot);
+ vma->vm_page_prot = __pgprot(prot);
+
+ /* Write-combine setting is ignored, it is changed via the mtrr
+ * interfaces on this platform.
+ */
+ if (remap_pfn_range(vma, vma->vm_start, vma->vm_pgoff,
+ vma->vm_end - vma->vm_start,
+ vma->vm_page_prot))
+ return -EAGAIN;
+
+ return 0;
+}
+
+resource_size_t
+pcibios_align_resource(void *data, const struct resource *res,
+ resource_size_t size, resource_size_t align)
+{
+ resource_size_t start = res->start;
+
+ if ((res->flags & IORESOURCE_IO) && (start & 0x300))
+ start = (start + 0x3ff) & ~0x3ff;
+
+ return start;
+}
+
+int pcibios_enable_resources(struct pci_dev *dev, int mask)
+{
+ u16 cmd, old_cmd;
+ int idx;
+ struct resource *r;
+
+ pci_read_config_word(dev, PCI_COMMAND, &cmd);
+ old_cmd = cmd;
+ for(idx=0; idx<6; idx++) {
+ /* Only set up the requested stuff */
+ if (!(mask & (1<<idx)))
+ continue;
+
+ r = &dev->resource[idx];
+ if (!r->start && r->end) {
+ printk(KERN_ERR "PCI: Device %s not available because of resource collisions\n", pci_name(dev));
+ return -EINVAL;
+ }
+ if (r->flags & IORESOURCE_IO)
+ cmd |= PCI_COMMAND_IO;
+ if (r->flags & IORESOURCE_MEM)
+ cmd |= PCI_COMMAND_MEMORY;
+ }
+ if (dev->resource[PCI_ROM_RESOURCE].start)
+ cmd |= PCI_COMMAND_MEMORY;
+ if (cmd != old_cmd) {
+ printk("PCI: Enabling device %s (%04x -> %04x)\n", pci_name(dev), old_cmd, cmd);
+ pci_write_config_word(dev, PCI_COMMAND, cmd);
+ }
+ return 0;
+}
+
+int pcibios_enable_irq(struct pci_dev *dev)
+{
+ dev->irq = EXT_INTR_VECT;
+ return 0;
+}
+
+int pcibios_enable_device(struct pci_dev *dev, int mask)
+{
+ int err;
+
+ if ((err = pcibios_enable_resources(dev, mask)) < 0)
+ return err;
+
+ if (!dev->msi_enabled)
+ pcibios_enable_irq(dev);
+ return 0;
+}
diff --git a/kernel/arch/cris/arch-v32/drivers/pci/dma.c b/kernel/arch/cris/arch-v32/drivers/pci/dma.c
new file mode 100644
index 000000000..ee55578d9
--- /dev/null
+++ b/kernel/arch/cris/arch-v32/drivers/pci/dma.c
@@ -0,0 +1,50 @@
+/*
+ * Dynamic DMA mapping support.
+ *
+ * On cris there is no hardware dynamic DMA address translation,
+ * so consistent alloc/free are merely page allocation/freeing.
+ * The rest of the dynamic DMA mapping interface is implemented
+ * in asm/pci.h.
+ *
+ * Borrowed from i386.
+ */
+
+#include <linux/types.h>
+#include <linux/mm.h>
+#include <linux/string.h>
+#include <linux/pci.h>
+#include <linux/gfp.h>
+#include <asm/io.h>
+
+void *dma_alloc_coherent(struct device *dev, size_t size,
+ dma_addr_t *dma_handle, gfp_t gfp)
+{
+ void *ret;
+ int order = get_order(size);
+ /* ignore region specifiers */
+ gfp &= ~(__GFP_DMA | __GFP_HIGHMEM);
+
+ if (dma_alloc_from_coherent(dev, size, dma_handle, &ret))
+ return ret;
+
+ if (dev == NULL || (dev->coherent_dma_mask < 0xffffffff))
+ gfp |= GFP_DMA;
+
+ ret = (void *)__get_free_pages(gfp, order);
+
+ if (ret != NULL) {
+ memset(ret, 0, size);
+ *dma_handle = virt_to_phys(ret);
+ }
+ return ret;
+}
+
+void dma_free_coherent(struct device *dev, size_t size,
+ void *vaddr, dma_addr_t dma_handle)
+{
+ int order = get_order(size);
+
+ if (!dma_release_from_coherent(dev, order, vaddr))
+ free_pages((unsigned long)vaddr, order);
+}
+
diff --git a/kernel/arch/cris/arch-v32/drivers/sync_serial.c b/kernel/arch/cris/arch-v32/drivers/sync_serial.c
new file mode 100644
index 000000000..4dda9bd6b
--- /dev/null
+++ b/kernel/arch/cris/arch-v32/drivers/sync_serial.c
@@ -0,0 +1,1709 @@
+/*
+ * Simple synchronous serial port driver for ETRAX FS and ARTPEC-3.
+ *
+ * Copyright (c) 2005, 2008 Axis Communications AB
+ * Author: Mikael Starvik
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/types.h>
+#include <linux/errno.h>
+#include <linux/major.h>
+#include <linux/sched.h>
+#include <linux/mutex.h>
+#include <linux/interrupt.h>
+#include <linux/poll.h>
+#include <linux/fs.h>
+#include <linux/cdev.h>
+#include <linux/device.h>
+#include <linux/wait.h>
+
+#include <asm/io.h>
+#include <mach/dma.h>
+#include <pinmux.h>
+#include <hwregs/reg_rdwr.h>
+#include <hwregs/sser_defs.h>
+#include <hwregs/timer_defs.h>
+#include <hwregs/dma_defs.h>
+#include <hwregs/dma.h>
+#include <hwregs/intr_vect_defs.h>
+#include <hwregs/intr_vect.h>
+#include <hwregs/reg_map.h>
+#include <asm/sync_serial.h>
+
+
+/* The receiver is a bit tricky because of the continuous stream of data.*/
+/* */
+/* Three DMA descriptors are linked together. Each DMA descriptor is */
+/* responsible for port->bufchunk of a common buffer. */
+/* */
+/* +---------------------------------------------+ */
+/* | +----------+ +----------+ +----------+ | */
+/* +-> | Descr[0] |-->| Descr[1] |-->| Descr[2] |-+ */
+/* +----------+ +----------+ +----------+ */
+/* | | | */
+/* v v v */
+/* +-------------------------------------+ */
+/* | BUFFER | */
+/* +-------------------------------------+ */
+/* |<- data_avail ->| */
+/* readp writep */
+/* */
+/* If the application keeps up the pace readp will be right after writep.*/
+/* If the application can't keep the pace we have to throw away data. */
+/* The idea is that readp should be ready with the data pointed out by */
+/* Descr[i] when the DMA has filled in Descr[i+1]. */
+/* Otherwise we will discard */
+/* the rest of the data pointed out by Descr1 and set readp to the start */
+/* of Descr2 */
+
+/* IN_BUFFER_SIZE should be a multiple of 6 to make sure that 24 bit */
+/* words can be handled */
+#define IN_DESCR_SIZE SSP_INPUT_CHUNK_SIZE
+#define NBR_IN_DESCR (8*6)
+#define IN_BUFFER_SIZE (IN_DESCR_SIZE * NBR_IN_DESCR)
+
+#define NBR_OUT_DESCR 8
+#define OUT_BUFFER_SIZE (1024 * NBR_OUT_DESCR)
+
+#define DEFAULT_FRAME_RATE 0
+#define DEFAULT_WORD_RATE 7
+
+/* To be removed when we move to pure udev. */
+#define SYNC_SERIAL_MAJOR 125
+
+/* NOTE: Enabling some debug will likely cause overrun or underrun,
+ * especially if manual mode is used.
+ */
+#define DEBUG(x)
+#define DEBUGREAD(x)
+#define DEBUGWRITE(x)
+#define DEBUGPOLL(x)
+#define DEBUGRXINT(x)
+#define DEBUGTXINT(x)
+#define DEBUGTRDMA(x)
+#define DEBUGOUTBUF(x)
+
+enum syncser_irq_setup {
+ no_irq_setup = 0,
+ dma_irq_setup = 1,
+ manual_irq_setup = 2,
+};
+
+struct sync_port {
+ unsigned long regi_sser;
+ unsigned long regi_dmain;
+ unsigned long regi_dmaout;
+
+ /* Interrupt vectors. */
+ unsigned long dma_in_intr_vect; /* Used for DMA in. */
+ unsigned long dma_out_intr_vect; /* Used for DMA out. */
+ unsigned long syncser_intr_vect; /* Used when no DMA. */
+
+ /* DMA number for in and out. */
+ unsigned int dma_in_nbr;
+ unsigned int dma_out_nbr;
+
+ /* DMA owner. */
+ enum dma_owner req_dma;
+
+ char started; /* 1 if port has been started */
+ char port_nbr; /* Port 0 or 1 */
+ char busy; /* 1 if port is busy */
+
+ char enabled; /* 1 if port is enabled */
+ char use_dma; /* 1 if port uses dma */
+ char tr_running;
+
+ enum syncser_irq_setup init_irqs;
+ int output;
+ int input;
+
+ /* Next byte to be read by application */
+ unsigned char *readp;
+ /* Next byte to be written by etrax */
+ unsigned char *writep;
+
+ unsigned int in_buffer_size;
+ unsigned int in_buffer_len;
+ unsigned int inbufchunk;
+ /* Data buffers for in and output. */
+ unsigned char out_buffer[OUT_BUFFER_SIZE] __aligned(32);
+ unsigned char in_buffer[IN_BUFFER_SIZE] __aligned(32);
+ unsigned char flip[IN_BUFFER_SIZE] __aligned(32);
+ struct timespec timestamp[NBR_IN_DESCR];
+ struct dma_descr_data *next_rx_desc;
+ struct dma_descr_data *prev_rx_desc;
+
+ struct timeval last_timestamp;
+ int read_ts_idx;
+ int write_ts_idx;
+
+ /* Pointer to the first available descriptor in the ring,
+ * unless active_tr_descr == catch_tr_descr and a dma
+ * transfer is active */
+ struct dma_descr_data *active_tr_descr;
+
+ /* Pointer to the first allocated descriptor in the ring */
+ struct dma_descr_data *catch_tr_descr;
+
+ /* Pointer to the descriptor with the current end-of-list */
+ struct dma_descr_data *prev_tr_descr;
+ int full;
+
+ /* Pointer to the first byte being read by DMA
+ * or current position in out_buffer if not using DMA. */
+ unsigned char *out_rd_ptr;
+
+ /* Number of bytes currently locked for being read by DMA */
+ int out_buf_count;
+
+ dma_descr_context in_context __aligned(32);
+ dma_descr_context out_context __aligned(32);
+ dma_descr_data in_descr[NBR_IN_DESCR] __aligned(16);
+ dma_descr_data out_descr[NBR_OUT_DESCR] __aligned(16);
+
+ wait_queue_head_t out_wait_q;
+ wait_queue_head_t in_wait_q;
+
+ spinlock_t lock;
+};
+
+static DEFINE_MUTEX(sync_serial_mutex);
+static int etrax_sync_serial_init(void);
+static void initialize_port(int portnbr);
+static inline int sync_data_avail(struct sync_port *port);
+
+static int sync_serial_open(struct inode *, struct file *);
+static int sync_serial_release(struct inode *, struct file *);
+static unsigned int sync_serial_poll(struct file *filp, poll_table *wait);
+
+static long sync_serial_ioctl(struct file *file,
+ unsigned int cmd, unsigned long arg);
+static int sync_serial_ioctl_unlocked(struct file *file,
+ unsigned int cmd, unsigned long arg);
+static ssize_t sync_serial_write(struct file *file, const char __user *buf,
+ size_t count, loff_t *ppos);
+static ssize_t sync_serial_read(struct file *file, char __user *buf,
+ size_t count, loff_t *ppos);
+
+#if ((defined(CONFIG_ETRAX_SYNCHRONOUS_SERIAL_PORT0) && \
+ defined(CONFIG_ETRAX_SYNCHRONOUS_SERIAL0_DMA)) || \
+ (defined(CONFIG_ETRAX_SYNCHRONOUS_SERIAL_PORT1) && \
+ defined(CONFIG_ETRAX_SYNCHRONOUS_SERIAL1_DMA)))
+#define SYNC_SER_DMA
+#else
+#define SYNC_SER_MANUAL
+#endif
+
+#ifdef SYNC_SER_DMA
+static void start_dma_out(struct sync_port *port, const char *data, int count);
+static void start_dma_in(struct sync_port *port);
+static irqreturn_t tr_interrupt(int irq, void *dev_id);
+static irqreturn_t rx_interrupt(int irq, void *dev_id);
+#endif
+#ifdef SYNC_SER_MANUAL
+static void send_word(struct sync_port *port);
+static irqreturn_t manual_interrupt(int irq, void *dev_id);
+#endif
+
+#define artpec_pinmux_alloc_fixed crisv32_pinmux_alloc_fixed
+#define artpec_request_dma crisv32_request_dma
+#define artpec_free_dma crisv32_free_dma
+
+#ifdef CONFIG_ETRAXFS
+/* ETRAX FS */
+#define DMA_OUT_NBR0 SYNC_SER0_TX_DMA_NBR
+#define DMA_IN_NBR0 SYNC_SER0_RX_DMA_NBR
+#define DMA_OUT_NBR1 SYNC_SER1_TX_DMA_NBR
+#define DMA_IN_NBR1 SYNC_SER1_RX_DMA_NBR
+#define PINMUX_SSER0 pinmux_sser0
+#define PINMUX_SSER1 pinmux_sser1
+#define SYNCSER_INST0 regi_sser0
+#define SYNCSER_INST1 regi_sser1
+#define SYNCSER_INTR_VECT0 SSER0_INTR_VECT
+#define SYNCSER_INTR_VECT1 SSER1_INTR_VECT
+#define OUT_DMA_INST0 regi_dma4
+#define IN_DMA_INST0 regi_dma5
+#define DMA_OUT_INTR_VECT0 DMA4_INTR_VECT
+#define DMA_OUT_INTR_VECT1 DMA7_INTR_VECT
+#define DMA_IN_INTR_VECT0 DMA5_INTR_VECT
+#define DMA_IN_INTR_VECT1 DMA6_INTR_VECT
+#define REQ_DMA_SYNCSER0 dma_sser0
+#define REQ_DMA_SYNCSER1 dma_sser1
+#if defined(CONFIG_ETRAX_SYNCHRONOUS_SERIAL1_DMA)
+#define PORT1_DMA 1
+#else
+#define PORT1_DMA 0
+#endif
+#elif defined(CONFIG_CRIS_MACH_ARTPEC3)
+/* ARTPEC-3 */
+#define DMA_OUT_NBR0 SYNC_SER_TX_DMA_NBR
+#define DMA_IN_NBR0 SYNC_SER_RX_DMA_NBR
+#define PINMUX_SSER0 pinmux_sser
+#define SYNCSER_INST0 regi_sser
+#define SYNCSER_INTR_VECT0 SSER_INTR_VECT
+#define OUT_DMA_INST0 regi_dma6
+#define IN_DMA_INST0 regi_dma7
+#define DMA_OUT_INTR_VECT0 DMA6_INTR_VECT
+#define DMA_IN_INTR_VECT0 DMA7_INTR_VECT
+#define REQ_DMA_SYNCSER0 dma_sser
+#define REQ_DMA_SYNCSER1 dma_sser
+#endif
+
+#if defined(CONFIG_ETRAX_SYNCHRONOUS_SERIAL0_DMA)
+#define PORT0_DMA 1
+#else
+#define PORT0_DMA 0
+#endif
+
+/* The ports */
+static struct sync_port ports[] = {
+ {
+ .regi_sser = SYNCSER_INST0,
+ .regi_dmaout = OUT_DMA_INST0,
+ .regi_dmain = IN_DMA_INST0,
+ .use_dma = PORT0_DMA,
+ .dma_in_intr_vect = DMA_IN_INTR_VECT0,
+ .dma_out_intr_vect = DMA_OUT_INTR_VECT0,
+ .dma_in_nbr = DMA_IN_NBR0,
+ .dma_out_nbr = DMA_OUT_NBR0,
+ .req_dma = REQ_DMA_SYNCSER0,
+ .syncser_intr_vect = SYNCSER_INTR_VECT0,
+ },
+#ifdef CONFIG_ETRAXFS
+ {
+ .regi_sser = SYNCSER_INST1,
+ .regi_dmaout = regi_dma6,
+ .regi_dmain = regi_dma7,
+ .use_dma = PORT1_DMA,
+ .dma_in_intr_vect = DMA_IN_INTR_VECT1,
+ .dma_out_intr_vect = DMA_OUT_INTR_VECT1,
+ .dma_in_nbr = DMA_IN_NBR1,
+ .dma_out_nbr = DMA_OUT_NBR1,
+ .req_dma = REQ_DMA_SYNCSER1,
+ .syncser_intr_vect = SYNCSER_INTR_VECT1,
+ },
+#endif
+};
+
+#define NBR_PORTS ARRAY_SIZE(ports)
+
+static const struct file_operations syncser_fops = {
+ .owner = THIS_MODULE,
+ .write = sync_serial_write,
+ .read = sync_serial_read,
+ .poll = sync_serial_poll,
+ .unlocked_ioctl = sync_serial_ioctl,
+ .open = sync_serial_open,
+ .release = sync_serial_release,
+ .llseek = noop_llseek,
+};
+
+static dev_t syncser_first;
+static int minor_count = NBR_PORTS;
+#define SYNCSER_NAME "syncser"
+static struct cdev *syncser_cdev;
+static struct class *syncser_class;
+
+static void sync_serial_start_port(struct sync_port *port)
+{
+ reg_sser_rw_cfg cfg = REG_RD(sser, port->regi_sser, rw_cfg);
+ reg_sser_rw_tr_cfg tr_cfg =
+ REG_RD(sser, port->regi_sser, rw_tr_cfg);
+ reg_sser_rw_rec_cfg rec_cfg =
+ REG_RD(sser, port->regi_sser, rw_rec_cfg);
+ cfg.en = regk_sser_yes;
+ tr_cfg.tr_en = regk_sser_yes;
+ rec_cfg.rec_en = regk_sser_yes;
+ REG_WR(sser, port->regi_sser, rw_cfg, cfg);
+ REG_WR(sser, port->regi_sser, rw_tr_cfg, tr_cfg);
+ REG_WR(sser, port->regi_sser, rw_rec_cfg, rec_cfg);
+ port->started = 1;
+}
+
+static void __init initialize_port(int portnbr)
+{
+ struct sync_port *port = &ports[portnbr];
+ reg_sser_rw_cfg cfg = { 0 };
+ reg_sser_rw_frm_cfg frm_cfg = { 0 };
+ reg_sser_rw_tr_cfg tr_cfg = { 0 };
+ reg_sser_rw_rec_cfg rec_cfg = { 0 };
+
+ DEBUG(pr_info("Init sync serial port %d\n", portnbr));
+
+ port->port_nbr = portnbr;
+ port->init_irqs = no_irq_setup;
+
+ port->out_rd_ptr = port->out_buffer;
+ port->out_buf_count = 0;
+
+ port->output = 1;
+ port->input = 0;
+
+ port->readp = port->flip;
+ port->writep = port->flip;
+ port->in_buffer_size = IN_BUFFER_SIZE;
+ port->in_buffer_len = 0;
+ port->inbufchunk = IN_DESCR_SIZE;
+
+ port->read_ts_idx = 0;
+ port->write_ts_idx = 0;
+
+ init_waitqueue_head(&port->out_wait_q);
+ init_waitqueue_head(&port->in_wait_q);
+
+ spin_lock_init(&port->lock);
+
+ cfg.out_clk_src = regk_sser_intern_clk;
+ cfg.out_clk_pol = regk_sser_pos;
+ cfg.clk_od_mode = regk_sser_no;
+ cfg.clk_dir = regk_sser_out;
+ cfg.gate_clk = regk_sser_no;
+ cfg.base_freq = regk_sser_f29_493;
+ cfg.clk_div = 256;
+ REG_WR(sser, port->regi_sser, rw_cfg, cfg);
+
+ frm_cfg.wordrate = DEFAULT_WORD_RATE;
+ frm_cfg.type = regk_sser_edge;
+ frm_cfg.frame_pin_dir = regk_sser_out;
+ frm_cfg.frame_pin_use = regk_sser_frm;
+ frm_cfg.status_pin_dir = regk_sser_in;
+ frm_cfg.status_pin_use = regk_sser_hold;
+ frm_cfg.out_on = regk_sser_tr;
+ frm_cfg.tr_delay = 1;
+ REG_WR(sser, port->regi_sser, rw_frm_cfg, frm_cfg);
+
+ tr_cfg.urun_stop = regk_sser_no;
+ tr_cfg.sample_size = 7;
+ tr_cfg.sh_dir = regk_sser_msbfirst;
+ tr_cfg.use_dma = port->use_dma ? regk_sser_yes : regk_sser_no;
+#if 0
+ tr_cfg.rate_ctrl = regk_sser_bulk;
+ tr_cfg.data_pin_use = regk_sser_dout;
+#else
+ tr_cfg.rate_ctrl = regk_sser_iso;
+ tr_cfg.data_pin_use = regk_sser_dout;
+#endif
+ tr_cfg.bulk_wspace = 1;
+ REG_WR(sser, port->regi_sser, rw_tr_cfg, tr_cfg);
+
+ rec_cfg.sample_size = 7;
+ rec_cfg.sh_dir = regk_sser_msbfirst;
+ rec_cfg.use_dma = port->use_dma ? regk_sser_yes : regk_sser_no;
+ rec_cfg.fifo_thr = regk_sser_inf;
+ REG_WR(sser, port->regi_sser, rw_rec_cfg, rec_cfg);
+
+#ifdef SYNC_SER_DMA
+ {
+ int i;
+ /* Setup the descriptor ring for dma out/transmit. */
+ for (i = 0; i < NBR_OUT_DESCR; i++) {
+ dma_descr_data *descr = &port->out_descr[i];
+ descr->wait = 0;
+ descr->intr = 1;
+ descr->eol = 0;
+ descr->out_eop = 0;
+ descr->next =
+ (dma_descr_data *)virt_to_phys(&descr[i+1]);
+ }
+ }
+
+ /* Create a ring from the list. */
+ port->out_descr[NBR_OUT_DESCR-1].next =
+ (dma_descr_data *)virt_to_phys(&port->out_descr[0]);
+
+ /* Setup context for traversing the ring. */
+ port->active_tr_descr = &port->out_descr[0];
+ port->prev_tr_descr = &port->out_descr[NBR_OUT_DESCR-1];
+ port->catch_tr_descr = &port->out_descr[0];
+#endif
+}
+
+static inline int sync_data_avail(struct sync_port *port)
+{
+ return port->in_buffer_len;
+}
+
+static int sync_serial_open(struct inode *inode, struct file *file)
+{
+ int ret = 0;
+ int dev = iminor(inode);
+ struct sync_port *port;
+#ifdef SYNC_SER_DMA
+ reg_dma_rw_cfg cfg = { .en = regk_dma_yes };
+ reg_dma_rw_intr_mask intr_mask = { .data = regk_dma_yes };
+#endif
+
+ DEBUG(pr_debug("Open sync serial port %d\n", dev));
+
+ if (dev < 0 || dev >= NBR_PORTS || !ports[dev].enabled) {
+ DEBUG(pr_info("Invalid minor %d\n", dev));
+ return -ENODEV;
+ }
+ port = &ports[dev];
+ /* Allow open this device twice (assuming one reader and one writer) */
+ if (port->busy == 2) {
+ DEBUG(pr_info("syncser%d is busy\n", dev));
+ return -EBUSY;
+ }
+
+ mutex_lock(&sync_serial_mutex);
+
+ /* Clear any stale date left in the flip buffer */
+ port->readp = port->writep = port->flip;
+ port->in_buffer_len = 0;
+ port->read_ts_idx = 0;
+ port->write_ts_idx = 0;
+
+ if (port->init_irqs != no_irq_setup) {
+ /* Init only on first call. */
+ port->busy++;
+ mutex_unlock(&sync_serial_mutex);
+ return 0;
+ }
+ if (port->use_dma) {
+#ifdef SYNC_SER_DMA
+ const char *tmp;
+ DEBUG(pr_info("Using DMA for syncser%d\n", dev));
+
+ tmp = dev == 0 ? "syncser0 tx" : "syncser1 tx";
+ if (request_irq(port->dma_out_intr_vect, tr_interrupt, 0,
+ tmp, port)) {
+ pr_err("Can't alloc syncser%d TX IRQ", dev);
+ ret = -EBUSY;
+ goto unlock_and_exit;
+ }
+ if (artpec_request_dma(port->dma_out_nbr, tmp,
+ DMA_VERBOSE_ON_ERROR, 0, port->req_dma)) {
+ free_irq(port->dma_out_intr_vect, port);
+ pr_err("Can't alloc syncser%d TX DMA", dev);
+ ret = -EBUSY;
+ goto unlock_and_exit;
+ }
+ tmp = dev == 0 ? "syncser0 rx" : "syncser1 rx";
+ if (request_irq(port->dma_in_intr_vect, rx_interrupt, 0,
+ tmp, port)) {
+ artpec_free_dma(port->dma_out_nbr);
+ free_irq(port->dma_out_intr_vect, port);
+ pr_err("Can't alloc syncser%d RX IRQ", dev);
+ ret = -EBUSY;
+ goto unlock_and_exit;
+ }
+ if (artpec_request_dma(port->dma_in_nbr, tmp,
+ DMA_VERBOSE_ON_ERROR, 0, port->req_dma)) {
+ artpec_free_dma(port->dma_out_nbr);
+ free_irq(port->dma_out_intr_vect, port);
+ free_irq(port->dma_in_intr_vect, port);
+ pr_err("Can't alloc syncser%d RX DMA", dev);
+ ret = -EBUSY;
+ goto unlock_and_exit;
+ }
+ /* Enable DMAs */
+ REG_WR(dma, port->regi_dmain, rw_cfg, cfg);
+ REG_WR(dma, port->regi_dmaout, rw_cfg, cfg);
+ /* Enable DMA IRQs */
+ REG_WR(dma, port->regi_dmain, rw_intr_mask, intr_mask);
+ REG_WR(dma, port->regi_dmaout, rw_intr_mask, intr_mask);
+ /* Set up wordsize = 1 for DMAs. */
+ DMA_WR_CMD(port->regi_dmain, regk_dma_set_w_size1);
+ DMA_WR_CMD(port->regi_dmaout, regk_dma_set_w_size1);
+
+ start_dma_in(port);
+ port->init_irqs = dma_irq_setup;
+#endif
+ } else { /* !port->use_dma */
+#ifdef SYNC_SER_MANUAL
+ const char *tmp = dev == 0 ? "syncser0 manual irq" :
+ "syncser1 manual irq";
+ if (request_irq(port->syncser_intr_vect, manual_interrupt,
+ 0, tmp, port)) {
+ pr_err("Can't alloc syncser%d manual irq",
+ dev);
+ ret = -EBUSY;
+ goto unlock_and_exit;
+ }
+ port->init_irqs = manual_irq_setup;
+#else
+ panic("sync_serial: Manual mode not supported\n");
+#endif /* SYNC_SER_MANUAL */
+ }
+ port->busy++;
+ ret = 0;
+
+unlock_and_exit:
+ mutex_unlock(&sync_serial_mutex);
+ return ret;
+}
+
+static int sync_serial_release(struct inode *inode, struct file *file)
+{
+ int dev = iminor(inode);
+ struct sync_port *port;
+
+ if (dev < 0 || dev >= NBR_PORTS || !ports[dev].enabled) {
+ DEBUG(pr_info("Invalid minor %d\n", dev));
+ return -ENODEV;
+ }
+ port = &ports[dev];
+ if (port->busy)
+ port->busy--;
+ if (!port->busy)
+ /* XXX */;
+ return 0;
+}
+
+static unsigned int sync_serial_poll(struct file *file, poll_table *wait)
+{
+ int dev = iminor(file_inode(file));
+ unsigned int mask = 0;
+ struct sync_port *port;
+ DEBUGPOLL(
+ static unsigned int prev_mask;
+ );
+
+ port = &ports[dev];
+
+ if (!port->started)
+ sync_serial_start_port(port);
+
+ poll_wait(file, &port->out_wait_q, wait);
+ poll_wait(file, &port->in_wait_q, wait);
+
+ /* No active transfer, descriptors are available */
+ if (port->output && !port->tr_running)
+ mask |= POLLOUT | POLLWRNORM;
+
+ /* Descriptor and buffer space available. */
+ if (port->output &&
+ port->active_tr_descr != port->catch_tr_descr &&
+ port->out_buf_count < OUT_BUFFER_SIZE)
+ mask |= POLLOUT | POLLWRNORM;
+
+ /* At least an inbufchunk of data */
+ if (port->input && sync_data_avail(port) >= port->inbufchunk)
+ mask |= POLLIN | POLLRDNORM;
+
+ DEBUGPOLL(
+ if (mask != prev_mask)
+ pr_info("sync_serial_poll: mask 0x%08X %s %s\n",
+ mask,
+ mask & POLLOUT ? "POLLOUT" : "",
+ mask & POLLIN ? "POLLIN" : "");
+ prev_mask = mask;
+ );
+ return mask;
+}
+
+static ssize_t __sync_serial_read(struct file *file,
+ char __user *buf,
+ size_t count,
+ loff_t *ppos,
+ struct timespec *ts)
+{
+ unsigned long flags;
+ int dev = MINOR(file_inode(file)->i_rdev);
+ int avail;
+ struct sync_port *port;
+ unsigned char *start;
+ unsigned char *end;
+
+ if (dev < 0 || dev >= NBR_PORTS || !ports[dev].enabled) {
+ DEBUG(pr_info("Invalid minor %d\n", dev));
+ return -ENODEV;
+ }
+ port = &ports[dev];
+
+ if (!port->started)
+ sync_serial_start_port(port);
+
+ /* Calculate number of available bytes */
+ /* Save pointers to avoid that they are modified by interrupt */
+ spin_lock_irqsave(&port->lock, flags);
+ start = port->readp;
+ end = port->writep;
+ spin_unlock_irqrestore(&port->lock, flags);
+
+ while ((start == end) && !port->in_buffer_len) {
+ if (file->f_flags & O_NONBLOCK)
+ return -EAGAIN;
+
+ wait_event_interruptible(port->in_wait_q,
+ !(start == end && !port->full));
+
+ if (signal_pending(current))
+ return -EINTR;
+
+ spin_lock_irqsave(&port->lock, flags);
+ start = port->readp;
+ end = port->writep;
+ spin_unlock_irqrestore(&port->lock, flags);
+ }
+
+ DEBUGREAD(pr_info("R%d c %d ri %u wi %u /%u\n",
+ dev, count,
+ start - port->flip, end - port->flip,
+ port->in_buffer_size));
+
+ /* Lazy read, never return wrapped data. */
+ if (end > start)
+ avail = end - start;
+ else
+ avail = port->flip + port->in_buffer_size - start;
+
+ count = count > avail ? avail : count;
+ if (copy_to_user(buf, start, count))
+ return -EFAULT;
+
+ /* If timestamp requested, find timestamp of first returned byte
+ * and copy it.
+ * N.B: Applications that request timstamps MUST read data in
+ * chunks that are multiples of IN_DESCR_SIZE.
+ * Otherwise the timestamps will not be aligned to the data read.
+ */
+ if (ts != NULL) {
+ int idx = port->read_ts_idx;
+ memcpy(ts, &port->timestamp[idx], sizeof(struct timespec));
+ port->read_ts_idx += count / IN_DESCR_SIZE;
+ if (port->read_ts_idx >= NBR_IN_DESCR)
+ port->read_ts_idx = 0;
+ }
+
+ spin_lock_irqsave(&port->lock, flags);
+ port->readp += count;
+ /* Check for wrap */
+ if (port->readp >= port->flip + port->in_buffer_size)
+ port->readp = port->flip;
+ port->in_buffer_len -= count;
+ port->full = 0;
+ spin_unlock_irqrestore(&port->lock, flags);
+
+ DEBUGREAD(pr_info("r %d\n", count));
+
+ return count;
+}
+
+static ssize_t sync_serial_input(struct file *file, unsigned long arg)
+{
+ struct ssp_request req;
+ int count;
+ int ret;
+
+ /* Copy the request structure from user-mode. */
+ ret = copy_from_user(&req, (struct ssp_request __user *)arg,
+ sizeof(struct ssp_request));
+
+ if (ret) {
+ DEBUG(pr_info("sync_serial_input copy from user failed\n"));
+ return -EFAULT;
+ }
+
+ /* To get the timestamps aligned, make sure that 'len'
+ * is a multiple of IN_DESCR_SIZE.
+ */
+ if ((req.len % IN_DESCR_SIZE) != 0) {
+ DEBUG(pr_info("sync_serial: req.len %x, IN_DESCR_SIZE %x\n",
+ req.len, IN_DESCR_SIZE));
+ return -EFAULT;
+ }
+
+ /* Do the actual read. */
+ /* Note that req.buf is actually a pointer to user space. */
+ count = __sync_serial_read(file, req.buf, req.len,
+ NULL, &req.ts);
+
+ if (count < 0) {
+ DEBUG(pr_info("sync_serial_input read failed\n"));
+ return count;
+ }
+
+ /* Copy the request back to user-mode. */
+ ret = copy_to_user((struct ssp_request __user *)arg, &req,
+ sizeof(struct ssp_request));
+
+ if (ret) {
+ DEBUG(pr_info("syncser input copy2user failed\n"));
+ return -EFAULT;
+ }
+
+ /* Return the number of bytes read. */
+ return count;
+}
+
+
+static int sync_serial_ioctl_unlocked(struct file *file,
+ unsigned int cmd, unsigned long arg)
+{
+ int return_val = 0;
+ int dma_w_size = regk_dma_set_w_size1;
+ int dev = iminor(file_inode(file));
+ struct sync_port *port;
+ reg_sser_rw_tr_cfg tr_cfg;
+ reg_sser_rw_rec_cfg rec_cfg;
+ reg_sser_rw_frm_cfg frm_cfg;
+ reg_sser_rw_cfg gen_cfg;
+ reg_sser_rw_intr_mask intr_mask;
+
+ if (dev < 0 || dev >= NBR_PORTS || !ports[dev].enabled) {
+ DEBUG(pr_info("Invalid minor %d\n", dev));
+ return -1;
+ }
+
+ if (cmd == SSP_INPUT)
+ return sync_serial_input(file, arg);
+
+ port = &ports[dev];
+ spin_lock_irq(&port->lock);
+
+ tr_cfg = REG_RD(sser, port->regi_sser, rw_tr_cfg);
+ rec_cfg = REG_RD(sser, port->regi_sser, rw_rec_cfg);
+ frm_cfg = REG_RD(sser, port->regi_sser, rw_frm_cfg);
+ gen_cfg = REG_RD(sser, port->regi_sser, rw_cfg);
+ intr_mask = REG_RD(sser, port->regi_sser, rw_intr_mask);
+
+ switch (cmd) {
+ case SSP_SPEED:
+ if (GET_SPEED(arg) == CODEC) {
+ unsigned int freq;
+
+ gen_cfg.base_freq = regk_sser_f32;
+
+ /* Clock divider will internally be
+ * gen_cfg.clk_div + 1.
+ */
+
+ freq = GET_FREQ(arg);
+ switch (freq) {
+ case FREQ_32kHz:
+ case FREQ_64kHz:
+ case FREQ_128kHz:
+ case FREQ_256kHz:
+ gen_cfg.clk_div = 125 *
+ (1 << (freq - FREQ_256kHz)) - 1;
+ break;
+ case FREQ_512kHz:
+ gen_cfg.clk_div = 62;
+ break;
+ case FREQ_1MHz:
+ case FREQ_2MHz:
+ case FREQ_4MHz:
+ gen_cfg.clk_div = 8 * (1 << freq) - 1;
+ break;
+ }
+ } else if (GET_SPEED(arg) == CODEC_f32768) {
+ gen_cfg.base_freq = regk_sser_f32_768;
+ switch (GET_FREQ(arg)) {
+ case FREQ_4096kHz:
+ gen_cfg.clk_div = 7;
+ break;
+ default:
+ spin_unlock_irq(&port->lock);
+ return -EINVAL;
+ }
+ } else {
+ gen_cfg.base_freq = regk_sser_f29_493;
+ switch (GET_SPEED(arg)) {
+ case SSP150:
+ gen_cfg.clk_div = 29493000 / (150 * 8) - 1;
+ break;
+ case SSP300:
+ gen_cfg.clk_div = 29493000 / (300 * 8) - 1;
+ break;
+ case SSP600:
+ gen_cfg.clk_div = 29493000 / (600 * 8) - 1;
+ break;
+ case SSP1200:
+ gen_cfg.clk_div = 29493000 / (1200 * 8) - 1;
+ break;
+ case SSP2400:
+ gen_cfg.clk_div = 29493000 / (2400 * 8) - 1;
+ break;
+ case SSP4800:
+ gen_cfg.clk_div = 29493000 / (4800 * 8) - 1;
+ break;
+ case SSP9600:
+ gen_cfg.clk_div = 29493000 / (9600 * 8) - 1;
+ break;
+ case SSP19200:
+ gen_cfg.clk_div = 29493000 / (19200 * 8) - 1;
+ break;
+ case SSP28800:
+ gen_cfg.clk_div = 29493000 / (28800 * 8) - 1;
+ break;
+ case SSP57600:
+ gen_cfg.clk_div = 29493000 / (57600 * 8) - 1;
+ break;
+ case SSP115200:
+ gen_cfg.clk_div = 29493000 / (115200 * 8) - 1;
+ break;
+ case SSP230400:
+ gen_cfg.clk_div = 29493000 / (230400 * 8) - 1;
+ break;
+ case SSP460800:
+ gen_cfg.clk_div = 29493000 / (460800 * 8) - 1;
+ break;
+ case SSP921600:
+ gen_cfg.clk_div = 29493000 / (921600 * 8) - 1;
+ break;
+ case SSP3125000:
+ gen_cfg.base_freq = regk_sser_f100;
+ gen_cfg.clk_div = 100000000 / (3125000 * 8) - 1;
+ break;
+
+ }
+ }
+ frm_cfg.wordrate = GET_WORD_RATE(arg);
+
+ break;
+ case SSP_MODE:
+ switch (arg) {
+ case MASTER_OUTPUT:
+ port->output = 1;
+ port->input = 0;
+ frm_cfg.out_on = regk_sser_tr;
+ frm_cfg.frame_pin_dir = regk_sser_out;
+ gen_cfg.clk_dir = regk_sser_out;
+ break;
+ case SLAVE_OUTPUT:
+ port->output = 1;
+ port->input = 0;
+ frm_cfg.frame_pin_dir = regk_sser_in;
+ gen_cfg.clk_dir = regk_sser_in;
+ break;
+ case MASTER_INPUT:
+ port->output = 0;
+ port->input = 1;
+ frm_cfg.frame_pin_dir = regk_sser_out;
+ frm_cfg.out_on = regk_sser_intern_tb;
+ gen_cfg.clk_dir = regk_sser_out;
+ break;
+ case SLAVE_INPUT:
+ port->output = 0;
+ port->input = 1;
+ frm_cfg.frame_pin_dir = regk_sser_in;
+ gen_cfg.clk_dir = regk_sser_in;
+ break;
+ case MASTER_BIDIR:
+ port->output = 1;
+ port->input = 1;
+ frm_cfg.frame_pin_dir = regk_sser_out;
+ frm_cfg.out_on = regk_sser_intern_tb;
+ gen_cfg.clk_dir = regk_sser_out;
+ break;
+ case SLAVE_BIDIR:
+ port->output = 1;
+ port->input = 1;
+ frm_cfg.frame_pin_dir = regk_sser_in;
+ gen_cfg.clk_dir = regk_sser_in;
+ break;
+ default:
+ spin_unlock_irq(&port->lock);
+ return -EINVAL;
+ }
+ if (!port->use_dma || arg == MASTER_OUTPUT ||
+ arg == SLAVE_OUTPUT)
+ intr_mask.rdav = regk_sser_yes;
+ break;
+ case SSP_FRAME_SYNC:
+ if (arg & NORMAL_SYNC) {
+ frm_cfg.rec_delay = 1;
+ frm_cfg.tr_delay = 1;
+ } else if (arg & EARLY_SYNC)
+ frm_cfg.rec_delay = frm_cfg.tr_delay = 0;
+ else if (arg & LATE_SYNC) {
+ frm_cfg.tr_delay = 2;
+ frm_cfg.rec_delay = 2;
+ } else if (arg & SECOND_WORD_SYNC) {
+ frm_cfg.rec_delay = 7;
+ frm_cfg.tr_delay = 1;
+ }
+
+ tr_cfg.bulk_wspace = frm_cfg.tr_delay;
+ frm_cfg.early_wend = regk_sser_yes;
+ if (arg & BIT_SYNC)
+ frm_cfg.type = regk_sser_edge;
+ else if (arg & WORD_SYNC)
+ frm_cfg.type = regk_sser_level;
+ else if (arg & EXTENDED_SYNC)
+ frm_cfg.early_wend = regk_sser_no;
+
+ if (arg & SYNC_ON)
+ frm_cfg.frame_pin_use = regk_sser_frm;
+ else if (arg & SYNC_OFF)
+ frm_cfg.frame_pin_use = regk_sser_gio0;
+
+ dma_w_size = regk_dma_set_w_size2;
+ if (arg & WORD_SIZE_8) {
+ rec_cfg.sample_size = tr_cfg.sample_size = 7;
+ dma_w_size = regk_dma_set_w_size1;
+ } else if (arg & WORD_SIZE_12)
+ rec_cfg.sample_size = tr_cfg.sample_size = 11;
+ else if (arg & WORD_SIZE_16)
+ rec_cfg.sample_size = tr_cfg.sample_size = 15;
+ else if (arg & WORD_SIZE_24)
+ rec_cfg.sample_size = tr_cfg.sample_size = 23;
+ else if (arg & WORD_SIZE_32)
+ rec_cfg.sample_size = tr_cfg.sample_size = 31;
+
+ if (arg & BIT_ORDER_MSB)
+ rec_cfg.sh_dir = tr_cfg.sh_dir = regk_sser_msbfirst;
+ else if (arg & BIT_ORDER_LSB)
+ rec_cfg.sh_dir = tr_cfg.sh_dir = regk_sser_lsbfirst;
+
+ if (arg & FLOW_CONTROL_ENABLE) {
+ frm_cfg.status_pin_use = regk_sser_frm;
+ rec_cfg.fifo_thr = regk_sser_thr16;
+ } else if (arg & FLOW_CONTROL_DISABLE) {
+ frm_cfg.status_pin_use = regk_sser_gio0;
+ rec_cfg.fifo_thr = regk_sser_inf;
+ }
+
+ if (arg & CLOCK_NOT_GATED)
+ gen_cfg.gate_clk = regk_sser_no;
+ else if (arg & CLOCK_GATED)
+ gen_cfg.gate_clk = regk_sser_yes;
+
+ break;
+ case SSP_IPOLARITY:
+ /* NOTE!! negedge is considered NORMAL */
+ if (arg & CLOCK_NORMAL)
+ rec_cfg.clk_pol = regk_sser_neg;
+ else if (arg & CLOCK_INVERT)
+ rec_cfg.clk_pol = regk_sser_pos;
+
+ if (arg & FRAME_NORMAL)
+ frm_cfg.level = regk_sser_pos_hi;
+ else if (arg & FRAME_INVERT)
+ frm_cfg.level = regk_sser_neg_lo;
+
+ if (arg & STATUS_NORMAL)
+ gen_cfg.hold_pol = regk_sser_pos;
+ else if (arg & STATUS_INVERT)
+ gen_cfg.hold_pol = regk_sser_neg;
+ break;
+ case SSP_OPOLARITY:
+ if (arg & CLOCK_NORMAL)
+ gen_cfg.out_clk_pol = regk_sser_pos;
+ else if (arg & CLOCK_INVERT)
+ gen_cfg.out_clk_pol = regk_sser_neg;
+
+ if (arg & FRAME_NORMAL)
+ frm_cfg.level = regk_sser_pos_hi;
+ else if (arg & FRAME_INVERT)
+ frm_cfg.level = regk_sser_neg_lo;
+
+ if (arg & STATUS_NORMAL)
+ gen_cfg.hold_pol = regk_sser_pos;
+ else if (arg & STATUS_INVERT)
+ gen_cfg.hold_pol = regk_sser_neg;
+ break;
+ case SSP_SPI:
+ rec_cfg.fifo_thr = regk_sser_inf;
+ rec_cfg.sh_dir = tr_cfg.sh_dir = regk_sser_msbfirst;
+ rec_cfg.sample_size = tr_cfg.sample_size = 7;
+ frm_cfg.frame_pin_use = regk_sser_frm;
+ frm_cfg.type = regk_sser_level;
+ frm_cfg.tr_delay = 1;
+ frm_cfg.level = regk_sser_neg_lo;
+ if (arg & SPI_SLAVE) {
+ rec_cfg.clk_pol = regk_sser_neg;
+ gen_cfg.clk_dir = regk_sser_in;
+ port->input = 1;
+ port->output = 0;
+ } else {
+ gen_cfg.out_clk_pol = regk_sser_pos;
+ port->input = 0;
+ port->output = 1;
+ gen_cfg.clk_dir = regk_sser_out;
+ }
+ break;
+ case SSP_INBUFCHUNK:
+ break;
+ default:
+ return_val = -1;
+ }
+
+
+ if (port->started) {
+ rec_cfg.rec_en = port->input;
+ gen_cfg.en = (port->output | port->input);
+ }
+
+ REG_WR(sser, port->regi_sser, rw_tr_cfg, tr_cfg);
+ REG_WR(sser, port->regi_sser, rw_rec_cfg, rec_cfg);
+ REG_WR(sser, port->regi_sser, rw_frm_cfg, frm_cfg);
+ REG_WR(sser, port->regi_sser, rw_intr_mask, intr_mask);
+ REG_WR(sser, port->regi_sser, rw_cfg, gen_cfg);
+
+
+ if (cmd == SSP_FRAME_SYNC && (arg & (WORD_SIZE_8 | WORD_SIZE_12 |
+ WORD_SIZE_16 | WORD_SIZE_24 | WORD_SIZE_32))) {
+ int en = gen_cfg.en;
+ gen_cfg.en = 0;
+ REG_WR(sser, port->regi_sser, rw_cfg, gen_cfg);
+ /* ##### Should DMA be stoped before we change dma size? */
+ DMA_WR_CMD(port->regi_dmain, dma_w_size);
+ DMA_WR_CMD(port->regi_dmaout, dma_w_size);
+ gen_cfg.en = en;
+ REG_WR(sser, port->regi_sser, rw_cfg, gen_cfg);
+ }
+
+ spin_unlock_irq(&port->lock);
+ return return_val;
+}
+
+static long sync_serial_ioctl(struct file *file,
+ unsigned int cmd, unsigned long arg)
+{
+ long ret;
+
+ mutex_lock(&sync_serial_mutex);
+ ret = sync_serial_ioctl_unlocked(file, cmd, arg);
+ mutex_unlock(&sync_serial_mutex);
+
+ return ret;
+}
+
+/* NOTE: sync_serial_write does not support concurrency */
+static ssize_t sync_serial_write(struct file *file, const char __user *buf,
+ size_t count, loff_t *ppos)
+{
+ int dev = iminor(file_inode(file));
+ DECLARE_WAITQUEUE(wait, current);
+ struct sync_port *port;
+ int trunc_count;
+ unsigned long flags;
+ int bytes_free;
+ int out_buf_count;
+
+ unsigned char *rd_ptr; /* First allocated byte in the buffer */
+ unsigned char *wr_ptr; /* First free byte in the buffer */
+ unsigned char *buf_stop_ptr; /* Last byte + 1 */
+
+ if (dev < 0 || dev >= NBR_PORTS || !ports[dev].enabled) {
+ DEBUG(pr_info("Invalid minor %d\n", dev));
+ return -ENODEV;
+ }
+ port = &ports[dev];
+
+ /* |<- OUT_BUFFER_SIZE ->|
+ * |<- out_buf_count ->|
+ * |<- trunc_count ->| ...->|
+ * ______________________________________________________
+ * | free | data | free |
+ * |_________|___________________|________________________|
+ * ^ rd_ptr ^ wr_ptr
+ */
+ DEBUGWRITE(pr_info("W d%d c %u a: %p c: %p\n",
+ port->port_nbr, count, port->active_tr_descr,
+ port->catch_tr_descr));
+
+ /* Read variables that may be updated by interrupts */
+ spin_lock_irqsave(&port->lock, flags);
+ rd_ptr = port->out_rd_ptr;
+ out_buf_count = port->out_buf_count;
+ spin_unlock_irqrestore(&port->lock, flags);
+
+ /* Check if resources are available */
+ if (port->tr_running &&
+ ((port->use_dma && port->active_tr_descr == port->catch_tr_descr) ||
+ out_buf_count >= OUT_BUFFER_SIZE)) {
+ DEBUGWRITE(pr_info("sser%d full\n", dev));
+ return -EAGAIN;
+ }
+
+ buf_stop_ptr = port->out_buffer + OUT_BUFFER_SIZE;
+
+ /* Determine pointer to the first free byte, before copying. */
+ wr_ptr = rd_ptr + out_buf_count;
+ if (wr_ptr >= buf_stop_ptr)
+ wr_ptr -= OUT_BUFFER_SIZE;
+
+ /* If we wrap the ring buffer, let the user space program handle it by
+ * truncating the data. This could be more elegant, small buffer
+ * fragments may occur.
+ */
+ bytes_free = OUT_BUFFER_SIZE - out_buf_count;
+ if (wr_ptr + bytes_free > buf_stop_ptr)
+ bytes_free = buf_stop_ptr - wr_ptr;
+ trunc_count = (count < bytes_free) ? count : bytes_free;
+
+ if (copy_from_user(wr_ptr, buf, trunc_count))
+ return -EFAULT;
+
+ DEBUGOUTBUF(pr_info("%-4d + %-4d = %-4d %p %p %p\n",
+ out_buf_count, trunc_count,
+ port->out_buf_count, port->out_buffer,
+ wr_ptr, buf_stop_ptr));
+
+ /* Make sure transmitter/receiver is running */
+ if (!port->started) {
+ reg_sser_rw_cfg cfg = REG_RD(sser, port->regi_sser, rw_cfg);
+ reg_sser_rw_rec_cfg rec_cfg =
+ REG_RD(sser, port->regi_sser, rw_rec_cfg);
+ cfg.en = regk_sser_yes;
+ rec_cfg.rec_en = port->input;
+ REG_WR(sser, port->regi_sser, rw_cfg, cfg);
+ REG_WR(sser, port->regi_sser, rw_rec_cfg, rec_cfg);
+ port->started = 1;
+ }
+
+ /* Setup wait if blocking */
+ if (!(file->f_flags & O_NONBLOCK)) {
+ add_wait_queue(&port->out_wait_q, &wait);
+ set_current_state(TASK_INTERRUPTIBLE);
+ }
+
+ spin_lock_irqsave(&port->lock, flags);
+ port->out_buf_count += trunc_count;
+ if (port->use_dma) {
+#ifdef SYNC_SER_DMA
+ start_dma_out(port, wr_ptr, trunc_count);
+#endif
+ } else if (!port->tr_running) {
+#ifdef SYNC_SER_MANUAL
+ reg_sser_rw_intr_mask intr_mask;
+ intr_mask = REG_RD(sser, port->regi_sser, rw_intr_mask);
+ /* Start sender by writing data */
+ send_word(port);
+ /* and enable transmitter ready IRQ */
+ intr_mask.trdy = 1;
+ REG_WR(sser, port->regi_sser, rw_intr_mask, intr_mask);
+#endif
+ }
+ spin_unlock_irqrestore(&port->lock, flags);
+
+ /* Exit if non blocking */
+ if (file->f_flags & O_NONBLOCK) {
+ DEBUGWRITE(pr_info("w d%d c %u %08x\n",
+ port->port_nbr, trunc_count,
+ REG_RD_INT(dma, port->regi_dmaout, r_intr)));
+ return trunc_count;
+ }
+
+ schedule();
+ remove_wait_queue(&port->out_wait_q, &wait);
+
+ if (signal_pending(current))
+ return -EINTR;
+
+ DEBUGWRITE(pr_info("w d%d c %u\n", port->port_nbr, trunc_count));
+ return trunc_count;
+}
+
+static ssize_t sync_serial_read(struct file *file, char __user *buf,
+ size_t count, loff_t *ppos)
+{
+ return __sync_serial_read(file, buf, count, ppos, NULL);
+}
+
+#ifdef SYNC_SER_MANUAL
+static void send_word(struct sync_port *port)
+{
+ reg_sser_rw_tr_cfg tr_cfg = REG_RD(sser, port->regi_sser, rw_tr_cfg);
+ reg_sser_rw_tr_data tr_data = {0};
+
+ switch (tr_cfg.sample_size) {
+ case 8:
+ port->out_buf_count--;
+ tr_data.data = *port->out_rd_ptr++;
+ REG_WR(sser, port->regi_sser, rw_tr_data, tr_data);
+ if (port->out_rd_ptr >= port->out_buffer + OUT_BUFFER_SIZE)
+ port->out_rd_ptr = port->out_buffer;
+ break;
+ case 12:
+ {
+ int data = (*port->out_rd_ptr++) << 8;
+ data |= *port->out_rd_ptr++;
+ port->out_buf_count -= 2;
+ tr_data.data = data;
+ REG_WR(sser, port->regi_sser, rw_tr_data, tr_data);
+ if (port->out_rd_ptr >= port->out_buffer + OUT_BUFFER_SIZE)
+ port->out_rd_ptr = port->out_buffer;
+ break;
+ }
+ case 16:
+ port->out_buf_count -= 2;
+ tr_data.data = *(unsigned short *)port->out_rd_ptr;
+ REG_WR(sser, port->regi_sser, rw_tr_data, tr_data);
+ port->out_rd_ptr += 2;
+ if (port->out_rd_ptr >= port->out_buffer + OUT_BUFFER_SIZE)
+ port->out_rd_ptr = port->out_buffer;
+ break;
+ case 24:
+ port->out_buf_count -= 3;
+ tr_data.data = *(unsigned short *)port->out_rd_ptr;
+ REG_WR(sser, port->regi_sser, rw_tr_data, tr_data);
+ port->out_rd_ptr += 2;
+ tr_data.data = *port->out_rd_ptr++;
+ REG_WR(sser, port->regi_sser, rw_tr_data, tr_data);
+ if (port->out_rd_ptr >= port->out_buffer + OUT_BUFFER_SIZE)
+ port->out_rd_ptr = port->out_buffer;
+ break;
+ case 32:
+ port->out_buf_count -= 4;
+ tr_data.data = *(unsigned short *)port->out_rd_ptr;
+ REG_WR(sser, port->regi_sser, rw_tr_data, tr_data);
+ port->out_rd_ptr += 2;
+ tr_data.data = *(unsigned short *)port->out_rd_ptr;
+ REG_WR(sser, port->regi_sser, rw_tr_data, tr_data);
+ port->out_rd_ptr += 2;
+ if (port->out_rd_ptr >= port->out_buffer + OUT_BUFFER_SIZE)
+ port->out_rd_ptr = port->out_buffer;
+ break;
+ }
+}
+#endif
+
+#ifdef SYNC_SER_DMA
+static void start_dma_out(struct sync_port *port, const char *data, int count)
+{
+ port->active_tr_descr->buf = (char *)virt_to_phys((char *)data);
+ port->active_tr_descr->after = port->active_tr_descr->buf + count;
+ port->active_tr_descr->intr = 1;
+
+ port->active_tr_descr->eol = 1;
+ port->prev_tr_descr->eol = 0;
+
+ DEBUGTRDMA(pr_info("Inserting eolr:%p eol@:%p\n",
+ port->prev_tr_descr, port->active_tr_descr));
+ port->prev_tr_descr = port->active_tr_descr;
+ port->active_tr_descr = phys_to_virt((int)port->active_tr_descr->next);
+
+ if (!port->tr_running) {
+ reg_sser_rw_tr_cfg tr_cfg = REG_RD(sser, port->regi_sser,
+ rw_tr_cfg);
+
+ port->out_context.next = NULL;
+ port->out_context.saved_data =
+ (dma_descr_data *)virt_to_phys(port->prev_tr_descr);
+ port->out_context.saved_data_buf = port->prev_tr_descr->buf;
+
+ DMA_START_CONTEXT(port->regi_dmaout,
+ virt_to_phys((char *)&port->out_context));
+
+ tr_cfg.tr_en = regk_sser_yes;
+ REG_WR(sser, port->regi_sser, rw_tr_cfg, tr_cfg);
+ DEBUGTRDMA(pr_info("dma s\n"););
+ } else {
+ DMA_CONTINUE_DATA(port->regi_dmaout);
+ DEBUGTRDMA(pr_info("dma c\n"););
+ }
+
+ port->tr_running = 1;
+}
+
+static void start_dma_in(struct sync_port *port)
+{
+ int i;
+ char *buf;
+ unsigned long flags;
+ spin_lock_irqsave(&port->lock, flags);
+ port->writep = port->flip;
+ spin_unlock_irqrestore(&port->lock, flags);
+
+ buf = (char *)virt_to_phys(port->in_buffer);
+ for (i = 0; i < NBR_IN_DESCR; i++) {
+ port->in_descr[i].buf = buf;
+ port->in_descr[i].after = buf + port->inbufchunk;
+ port->in_descr[i].intr = 1;
+ port->in_descr[i].next =
+ (dma_descr_data *)virt_to_phys(&port->in_descr[i+1]);
+ port->in_descr[i].buf = buf;
+ buf += port->inbufchunk;
+ }
+ /* Link the last descriptor to the first */
+ port->in_descr[i-1].next =
+ (dma_descr_data *)virt_to_phys(&port->in_descr[0]);
+ port->in_descr[i-1].eol = regk_sser_yes;
+ port->next_rx_desc = &port->in_descr[0];
+ port->prev_rx_desc = &port->in_descr[NBR_IN_DESCR - 1];
+ port->in_context.saved_data =
+ (dma_descr_data *)virt_to_phys(&port->in_descr[0]);
+ port->in_context.saved_data_buf = port->in_descr[0].buf;
+ DMA_START_CONTEXT(port->regi_dmain, virt_to_phys(&port->in_context));
+}
+
+static irqreturn_t tr_interrupt(int irq, void *dev_id)
+{
+ reg_dma_r_masked_intr masked;
+ reg_dma_rw_ack_intr ack_intr = { .data = regk_dma_yes };
+ reg_dma_rw_stat stat;
+ int i;
+ int found = 0;
+ int stop_sser = 0;
+
+ for (i = 0; i < NBR_PORTS; i++) {
+ struct sync_port *port = &ports[i];
+ if (!port->enabled || !port->use_dma)
+ continue;
+
+ /* IRQ active for the port? */
+ masked = REG_RD(dma, port->regi_dmaout, r_masked_intr);
+ if (!masked.data)
+ continue;
+
+ found = 1;
+
+ /* Check if we should stop the DMA transfer */
+ stat = REG_RD(dma, port->regi_dmaout, rw_stat);
+ if (stat.list_state == regk_dma_data_at_eol)
+ stop_sser = 1;
+
+ /* Clear IRQ */
+ REG_WR(dma, port->regi_dmaout, rw_ack_intr, ack_intr);
+
+ if (!stop_sser) {
+ /* The DMA has completed a descriptor, EOL was not
+ * encountered, so step relevant descriptor and
+ * datapointers forward. */
+ int sent;
+ sent = port->catch_tr_descr->after -
+ port->catch_tr_descr->buf;
+ DEBUGTXINT(pr_info("%-4d - %-4d = %-4d\t"
+ "in descr %p (ac: %p)\n",
+ port->out_buf_count, sent,
+ port->out_buf_count - sent,
+ port->catch_tr_descr,
+ port->active_tr_descr););
+ port->out_buf_count -= sent;
+ port->catch_tr_descr =
+ phys_to_virt((int) port->catch_tr_descr->next);
+ port->out_rd_ptr =
+ phys_to_virt((int) port->catch_tr_descr->buf);
+ } else {
+ reg_sser_rw_tr_cfg tr_cfg;
+ int j, sent;
+ /* EOL handler.
+ * Note that if an EOL was encountered during the irq
+ * locked section of sync_ser_write the DMA will be
+ * restarted and the eol flag will be cleared.
+ * The remaining descriptors will be traversed by
+ * the descriptor interrupts as usual.
+ */
+ j = 0;
+ while (!port->catch_tr_descr->eol) {
+ sent = port->catch_tr_descr->after -
+ port->catch_tr_descr->buf;
+ DEBUGOUTBUF(pr_info(
+ "traversing descr %p -%d (%d)\n",
+ port->catch_tr_descr,
+ sent,
+ port->out_buf_count));
+ port->out_buf_count -= sent;
+ port->catch_tr_descr = phys_to_virt(
+ (int)port->catch_tr_descr->next);
+ j++;
+ if (j >= NBR_OUT_DESCR) {
+ /* TODO: Reset and recover */
+ panic("sync_serial: missing eol");
+ }
+ }
+ sent = port->catch_tr_descr->after -
+ port->catch_tr_descr->buf;
+ DEBUGOUTBUF(pr_info("eol at descr %p -%d (%d)\n",
+ port->catch_tr_descr,
+ sent,
+ port->out_buf_count));
+
+ port->out_buf_count -= sent;
+
+ /* Update read pointer to first free byte, we
+ * may already be writing data there. */
+ port->out_rd_ptr =
+ phys_to_virt((int) port->catch_tr_descr->after);
+ if (port->out_rd_ptr > port->out_buffer +
+ OUT_BUFFER_SIZE)
+ port->out_rd_ptr = port->out_buffer;
+
+ tr_cfg = REG_RD(sser, port->regi_sser, rw_tr_cfg);
+ DEBUGTXINT(pr_info(
+ "tr_int DMA stop %d, set catch @ %p\n",
+ port->out_buf_count,
+ port->active_tr_descr));
+ if (port->out_buf_count != 0)
+ pr_err("sync_ser: buf not empty after eol\n");
+ port->catch_tr_descr = port->active_tr_descr;
+ port->tr_running = 0;
+ tr_cfg.tr_en = regk_sser_no;
+ REG_WR(sser, port->regi_sser, rw_tr_cfg, tr_cfg);
+ }
+ /* wake up the waiting process */
+ wake_up_interruptible(&port->out_wait_q);
+ }
+ return IRQ_RETVAL(found);
+} /* tr_interrupt */
+
+
+static inline void handle_rx_packet(struct sync_port *port)
+{
+ int idx;
+ reg_dma_rw_ack_intr ack_intr = { .data = regk_dma_yes };
+ unsigned long flags;
+
+ DEBUGRXINT(pr_info("!"));
+ spin_lock_irqsave(&port->lock, flags);
+
+ /* If we overrun the user experience is crap regardless if we
+ * drop new or old data. Its much easier to get it right when
+ * dropping new data so lets do that.
+ */
+ if ((port->writep + port->inbufchunk <=
+ port->flip + port->in_buffer_size) &&
+ (port->in_buffer_len + port->inbufchunk < IN_BUFFER_SIZE)) {
+ memcpy(port->writep,
+ phys_to_virt((unsigned)port->next_rx_desc->buf),
+ port->inbufchunk);
+ port->writep += port->inbufchunk;
+ if (port->writep >= port->flip + port->in_buffer_size)
+ port->writep = port->flip;
+
+ /* Timestamp the new data chunk. */
+ if (port->write_ts_idx == NBR_IN_DESCR)
+ port->write_ts_idx = 0;
+ idx = port->write_ts_idx++;
+ do_posix_clock_monotonic_gettime(&port->timestamp[idx]);
+ port->in_buffer_len += port->inbufchunk;
+ }
+ spin_unlock_irqrestore(&port->lock, flags);
+
+ port->next_rx_desc->eol = 1;
+ port->prev_rx_desc->eol = 0;
+ /* Cache bug workaround */
+ flush_dma_descr(port->prev_rx_desc, 0);
+ port->prev_rx_desc = port->next_rx_desc;
+ port->next_rx_desc = phys_to_virt((unsigned)port->next_rx_desc->next);
+ /* Cache bug workaround */
+ flush_dma_descr(port->prev_rx_desc, 1);
+ /* wake up the waiting process */
+ wake_up_interruptible(&port->in_wait_q);
+ DMA_CONTINUE(port->regi_dmain);
+ REG_WR(dma, port->regi_dmain, rw_ack_intr, ack_intr);
+
+}
+
+static irqreturn_t rx_interrupt(int irq, void *dev_id)
+{
+ reg_dma_r_masked_intr masked;
+
+ int i;
+ int found = 0;
+
+ DEBUG(pr_info("rx_interrupt\n"));
+
+ for (i = 0; i < NBR_PORTS; i++) {
+ struct sync_port *port = &ports[i];
+
+ if (!port->enabled || !port->use_dma)
+ continue;
+
+ masked = REG_RD(dma, port->regi_dmain, r_masked_intr);
+
+ if (!masked.data)
+ continue;
+
+ /* Descriptor interrupt */
+ found = 1;
+ while (REG_RD(dma, port->regi_dmain, rw_data) !=
+ virt_to_phys(port->next_rx_desc))
+ handle_rx_packet(port);
+ }
+ return IRQ_RETVAL(found);
+} /* rx_interrupt */
+#endif /* SYNC_SER_DMA */
+
+#ifdef SYNC_SER_MANUAL
+static irqreturn_t manual_interrupt(int irq, void *dev_id)
+{
+ unsigned long flags;
+ int i;
+ int found = 0;
+ reg_sser_r_masked_intr masked;
+
+ for (i = 0; i < NBR_PORTS; i++) {
+ struct sync_port *port = &ports[i];
+
+ if (!port->enabled || port->use_dma)
+ continue;
+
+ masked = REG_RD(sser, port->regi_sser, r_masked_intr);
+ /* Data received? */
+ if (masked.rdav) {
+ reg_sser_rw_rec_cfg rec_cfg =
+ REG_RD(sser, port->regi_sser, rw_rec_cfg);
+ reg_sser_r_rec_data data = REG_RD(sser,
+ port->regi_sser, r_rec_data);
+ found = 1;
+ /* Read data */
+ spin_lock_irqsave(&port->lock, flags);
+ switch (rec_cfg.sample_size) {
+ case 8:
+ *port->writep++ = data.data & 0xff;
+ break;
+ case 12:
+ *port->writep = (data.data & 0x0ff0) >> 4;
+ *(port->writep + 1) = data.data & 0x0f;
+ port->writep += 2;
+ break;
+ case 16:
+ *(unsigned short *)port->writep = data.data;
+ port->writep += 2;
+ break;
+ case 24:
+ *(unsigned int *)port->writep = data.data;
+ port->writep += 3;
+ break;
+ case 32:
+ *(unsigned int *)port->writep = data.data;
+ port->writep += 4;
+ break;
+ }
+
+ /* Wrap? */
+ if (port->writep >= port->flip + port->in_buffer_size)
+ port->writep = port->flip;
+ if (port->writep == port->readp) {
+ /* Receive buf overrun, discard oldest data */
+ port->readp++;
+ /* Wrap? */
+ if (port->readp >= port->flip +
+ port->in_buffer_size)
+ port->readp = port->flip;
+ }
+ spin_unlock_irqrestore(&port->lock, flags);
+ if (sync_data_avail(port) >= port->inbufchunk)
+ /* Wake up application */
+ wake_up_interruptible(&port->in_wait_q);
+ }
+
+ /* Transmitter ready? */
+ if (masked.trdy) {
+ found = 1;
+ /* More data to send */
+ if (port->out_buf_count > 0)
+ send_word(port);
+ else {
+ /* Transmission finished */
+ reg_sser_rw_intr_mask intr_mask;
+ intr_mask = REG_RD(sser, port->regi_sser,
+ rw_intr_mask);
+ intr_mask.trdy = 0;
+ REG_WR(sser, port->regi_sser,
+ rw_intr_mask, intr_mask);
+ /* Wake up application */
+ wake_up_interruptible(&port->out_wait_q);
+ }
+ }
+ }
+ return IRQ_RETVAL(found);
+}
+#endif
+
+static int __init etrax_sync_serial_init(void)
+{
+#if 1
+ /* This code will be removed when we move to udev for all devices. */
+ syncser_first = MKDEV(SYNC_SERIAL_MAJOR, 0);
+ if (register_chrdev_region(syncser_first, minor_count, SYNCSER_NAME)) {
+ pr_err("Failed to register major %d\n", SYNC_SERIAL_MAJOR);
+ return -1;
+ }
+#else
+ /* Allocate dynamic major number. */
+ if (alloc_chrdev_region(&syncser_first, 0, minor_count, SYNCSER_NAME)) {
+ pr_err("Failed to allocate character device region\n");
+ return -1;
+ }
+#endif
+ syncser_cdev = cdev_alloc();
+ if (!syncser_cdev) {
+ pr_err("Failed to allocate cdev for syncser\n");
+ unregister_chrdev_region(syncser_first, minor_count);
+ return -1;
+ }
+ cdev_init(syncser_cdev, &syncser_fops);
+
+ /* Create a sysfs class for syncser */
+ syncser_class = class_create(THIS_MODULE, "syncser_class");
+
+ /* Initialize Ports */
+#if defined(CONFIG_ETRAX_SYNCHRONOUS_SERIAL_PORT0)
+ if (artpec_pinmux_alloc_fixed(PINMUX_SSER0)) {
+ pr_warn("Unable to alloc pins for synchronous serial port 0\n");
+ unregister_chrdev_region(syncser_first, minor_count);
+ return -EIO;
+ }
+ initialize_port(0);
+ ports[0].enabled = 1;
+ /* Register with sysfs so udev can pick it up. */
+ device_create(syncser_class, NULL, syncser_first, NULL,
+ "%s%d", SYNCSER_NAME, 0);
+#endif
+
+#if defined(CONFIG_ETRAXFS) && defined(CONFIG_ETRAX_SYNCHRONOUS_SERIAL_PORT1)
+ if (artpec_pinmux_alloc_fixed(PINMUX_SSER1)) {
+ pr_warn("Unable to alloc pins for synchronous serial port 1\n");
+ unregister_chrdev_region(syncser_first, minor_count);
+ class_destroy(syncser_class);
+ return -EIO;
+ }
+ initialize_port(1);
+ ports[1].enabled = 1;
+ /* Register with sysfs so udev can pick it up. */
+ device_create(syncser_class, NULL, syncser_first, NULL,
+ "%s%d", SYNCSER_NAME, 0);
+#endif
+
+ /* Add it to system */
+ if (cdev_add(syncser_cdev, syncser_first, minor_count) < 0) {
+ pr_err("Failed to add syncser as char device\n");
+ device_destroy(syncser_class, syncser_first);
+ class_destroy(syncser_class);
+ cdev_del(syncser_cdev);
+ unregister_chrdev_region(syncser_first, minor_count);
+ return -1;
+ }
+
+
+ pr_info("ARTPEC synchronous serial port (%s: %d, %d)\n",
+ SYNCSER_NAME, MAJOR(syncser_first), MINOR(syncser_first));
+
+ return 0;
+}
+
+static void __exit etrax_sync_serial_exit(void)
+{
+ int i;
+ device_destroy(syncser_class, syncser_first);
+ class_destroy(syncser_class);
+
+ if (syncser_cdev) {
+ cdev_del(syncser_cdev);
+ unregister_chrdev_region(syncser_first, minor_count);
+ }
+ for (i = 0; i < NBR_PORTS; i++) {
+ struct sync_port *port = &ports[i];
+ if (port->init_irqs == dma_irq_setup) {
+ /* Free dma irqs and dma channels. */
+#ifdef SYNC_SER_DMA
+ artpec_free_dma(port->dma_in_nbr);
+ artpec_free_dma(port->dma_out_nbr);
+ free_irq(port->dma_out_intr_vect, port);
+ free_irq(port->dma_in_intr_vect, port);
+#endif
+ } else if (port->init_irqs == manual_irq_setup) {
+ /* Free manual irq. */
+ free_irq(port->syncser_intr_vect, port);
+ }
+ }
+
+ pr_info("ARTPEC synchronous serial port unregistered\n");
+}
+
+module_init(etrax_sync_serial_init);
+module_exit(etrax_sync_serial_exit);
+
+MODULE_LICENSE("GPL");
+