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authorYunhong Jiang <yunhong.jiang@intel.com>2015-08-04 12:17:53 -0700
committerYunhong Jiang <yunhong.jiang@intel.com>2015-08-04 15:44:42 -0700
commit9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 (patch)
tree1c9cafbcd35f783a87880a10f85d1a060db1a563 /kernel/arch/arm/plat-omap
parent98260f3884f4a202f9ca5eabed40b1354c489b29 (diff)
Add the rt linux 4.1.3-rt3 as base
Import the rt linux 4.1.3-rt3 as OPNFV kvm base. It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and the base is: commit 0917f823c59692d751951bf5ea699a2d1e2f26a2 Author: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Date: Sat Jul 25 12:13:34 2015 +0200 Prepare v4.1.3-rt3 Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> We lose all the git history this way and it's not good. We should apply another opnfv project repo in future. Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423 Signed-off-by: Yunhong Jiang <yunhong.jiang@intel.com>
Diffstat (limited to 'kernel/arch/arm/plat-omap')
-rw-r--r--kernel/arch/arm/plat-omap/Kconfig161
-rw-r--r--kernel/arch/arm/plat-omap/Makefile16
-rw-r--r--kernel/arch/arm/plat-omap/counter_32k.c117
-rw-r--r--kernel/arch/arm/plat-omap/debug-leds.c174
-rw-r--r--kernel/arch/arm/plat-omap/dma.c1466
-rw-r--r--kernel/arch/arm/plat-omap/dmtimer.c965
-rw-r--r--kernel/arch/arm/plat-omap/i2c.c116
-rw-r--r--kernel/arch/arm/plat-omap/include/plat/counter-32k.h1
-rw-r--r--kernel/arch/arm/plat-omap/include/plat/cpu.h35
-rw-r--r--kernel/arch/arm/plat-omap/include/plat/dmtimer.h418
-rw-r--r--kernel/arch/arm/plat-omap/include/plat/i2c.h53
-rw-r--r--kernel/arch/arm/plat-omap/include/plat/sram.h16
-rw-r--r--kernel/arch/arm/plat-omap/sram.c98
13 files changed, 3636 insertions, 0 deletions
diff --git a/kernel/arch/arm/plat-omap/Kconfig b/kernel/arch/arm/plat-omap/Kconfig
new file mode 100644
index 000000000..d055db32f
--- /dev/null
+++ b/kernel/arch/arm/plat-omap/Kconfig
@@ -0,0 +1,161 @@
+config ARCH_OMAP
+ bool
+
+if ARCH_OMAP
+
+menu "TI OMAP Common Features"
+
+config ARCH_OMAP_OTG
+ bool
+
+comment "OMAP Feature Selections"
+
+config OMAP_DEBUG_DEVICES
+ bool
+ help
+ For debug cards on TI reference boards.
+
+config OMAP_DEBUG_LEDS
+ def_bool y if NEW_LEDS
+ depends on OMAP_DEBUG_DEVICES
+ select LEDS_CLASS
+
+config POWER_AVS_OMAP
+ bool "AVS(Adaptive Voltage Scaling) support for OMAP IP versions 1&2"
+ depends on POWER_AVS && (ARCH_OMAP3 || ARCH_OMAP4) && PM
+ select POWER_SUPPLY
+ help
+ Say Y to enable AVS(Adaptive Voltage Scaling)
+ support on OMAP containing the version 1 or
+ version 2 of the SmartReflex IP.
+ V1 is the 65nm version used in OMAP3430.
+ V2 is the update for the 45nm version of the IP used in OMAP3630
+ and OMAP4430
+
+ Please note, that by default SmartReflex is only
+ initialized and not enabled. To enable the automatic voltage
+ compensation for vdd mpu and vdd core from user space,
+ user must write 1 to
+ /debug/smartreflex/sr_<X>/autocomp,
+ where X is mpu_iva or core for OMAP3.
+ Optionally autocompensation can be enabled in the kernel
+ by default during system init via the enable_on_init flag
+ which an be passed as platform data to the smartreflex driver.
+
+config POWER_AVS_OMAP_CLASS3
+ bool "Class 3 mode of Smartreflex Implementation"
+ depends on POWER_AVS_OMAP && TWL4030_CORE
+ help
+ Say Y to enable Class 3 implementation of Smartreflex
+
+ Class 3 implementation of Smartreflex employs continuous hardware
+ voltage calibration.
+
+config OMAP_RESET_CLOCKS
+ bool "Reset unused clocks during boot"
+ depends on ARCH_OMAP
+ help
+ Say Y if you want to reset unused clocks during boot.
+ This option saves power, but assumes all drivers are
+ using the clock framework. Broken drivers that do not
+ yet use clock framework may not work with this option.
+ If you are booting from another operating system, you
+ probably do not want this option enabled until your
+ device drivers work properly.
+
+config OMAP_MUX
+ bool "OMAP multiplexing support"
+ depends on ARCH_OMAP
+ default y
+ help
+ Pin multiplexing support for OMAP boards. If your bootloader
+ sets the multiplexing correctly, say N. Otherwise, or if unsure,
+ say Y.
+
+config OMAP_MUX_DEBUG
+ bool "Multiplexing debug output"
+ depends on OMAP_MUX
+ help
+ Makes the multiplexing functions print out a lot of debug info.
+ This is useful if you want to find out the correct values of the
+ multiplexing registers.
+
+config OMAP_MUX_WARNINGS
+ bool "Warn about pins the bootloader didn't set up"
+ depends on OMAP_MUX
+ default y
+ help
+ Choose Y here to warn whenever driver initialization logic needs
+ to change the pin multiplexing setup. When there are no warnings
+ printed, it's safe to deselect OMAP_MUX for your product.
+
+config OMAP_MPU_TIMER
+ bool "Use mpu timer"
+ depends on ARCH_OMAP1
+ help
+ Select this option if you want to use the OMAP mpu timer. This
+ timer provides more intra-tick resolution than the 32KHz timer,
+ but consumes more power.
+
+config OMAP_32K_TIMER
+ bool "Use 32KHz timer"
+ depends on ARCH_OMAP16XX || ARCH_OMAP2PLUS
+ default y if (ARCH_OMAP16XX || ARCH_OMAP2PLUS)
+ help
+ Select this option if you want to enable the OMAP 32KHz timer.
+ This timer saves power compared to the OMAP_MPU_TIMER, and has
+ support for no tick during idle. The 32KHz timer provides less
+ intra-tick resolution than OMAP_MPU_TIMER. The 32KHz timer is
+ currently only available for OMAP16XX, 24XX, 34XX, OMAP4/5 and DRA7XX.
+
+ On OMAP2PLUS this value is only used for CONFIG_HZ and
+ CLOCK_TICK_RATE compile time calculation.
+ The actual timer selection is done in the board file
+ through the (DT_)MACHINE_START structure.
+
+
+config OMAP3_L2_AUX_SECURE_SAVE_RESTORE
+ bool "OMAP3 HS/EMU save and restore for L2 AUX control register"
+ depends on ARCH_OMAP3 && PM
+ default n
+ help
+ Without this option, L2 Auxiliary control register contents are
+ lost during off-mode entry on HS/EMU devices. This feature
+ requires support from PPA / boot-loader in HS/EMU devices, which
+ currently does not exist by default.
+
+config OMAP3_L2_AUX_SECURE_SERVICE_SET_ID
+ int "Service ID for the support routine to set L2 AUX control"
+ depends on OMAP3_L2_AUX_SECURE_SAVE_RESTORE
+ default 43
+ help
+ PPA routine service ID for setting L2 auxiliary control register.
+
+config OMAP_DM_TIMER
+ bool "Use dual-mode timer"
+ depends on ARCH_OMAP16XX || ARCH_OMAP2PLUS
+ help
+ Select this option if you want to use OMAP Dual-Mode timers.
+
+config OMAP_SERIAL_WAKE
+ bool "Enable wake-up events for serial ports"
+ depends on ARCH_OMAP1 && OMAP_MUX
+ default y
+ help
+ Select this option if you want to have your system wake up
+ to data on the serial RX line. This allows you to wake the
+ system from serial console.
+
+choice
+ prompt "OMAP PM layer selection"
+ depends on ARCH_OMAP
+ default OMAP_PM_NOOP
+
+config OMAP_PM_NOOP
+ bool "No-op/debug PM layer"
+
+endchoice
+
+endmenu
+
+endif
diff --git a/kernel/arch/arm/plat-omap/Makefile b/kernel/arch/arm/plat-omap/Makefile
new file mode 100644
index 000000000..97a50e888
--- /dev/null
+++ b/kernel/arch/arm/plat-omap/Makefile
@@ -0,0 +1,16 @@
+#
+# Makefile for the linux kernel.
+#
+
+ccflags-$(CONFIG_ARCH_MULTIPLATFORM) := -I$(srctree)/arch/arm/plat-omap/include
+
+# Common support
+obj-y := sram.o dma.o counter_32k.o
+
+# omap_device support (OMAP2+ only at the moment)
+
+obj-$(CONFIG_OMAP_DM_TIMER) += dmtimer.o
+obj-$(CONFIG_OMAP_DEBUG_LEDS) += debug-leds.o
+i2c-omap-$(CONFIG_I2C_OMAP) := i2c.o
+obj-y += $(i2c-omap-m) $(i2c-omap-y)
+
diff --git a/kernel/arch/arm/plat-omap/counter_32k.c b/kernel/arch/arm/plat-omap/counter_32k.c
new file mode 100644
index 000000000..2438b9600
--- /dev/null
+++ b/kernel/arch/arm/plat-omap/counter_32k.c
@@ -0,0 +1,117 @@
+/*
+ * OMAP 32ksynctimer/counter_32k-related code
+ *
+ * Copyright (C) 2009 Texas Instruments
+ * Copyright (C) 2010 Nokia Corporation
+ * Tony Lindgren <tony@atomide.com>
+ * Added OMAP4 support - Santosh Shilimkar <santosh.shilimkar@ti.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.
+ *
+ * NOTE: This timer is not the same timer as the old OMAP1 MPU timer.
+ */
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/clk.h>
+#include <linux/err.h>
+#include <linux/io.h>
+#include <linux/clocksource.h>
+#include <linux/sched_clock.h>
+
+#include <asm/mach/time.h>
+
+#include <plat/counter-32k.h>
+
+/* OMAP2_32KSYNCNT_CR_OFF: offset of 32ksync counter register */
+#define OMAP2_32KSYNCNT_REV_OFF 0x0
+#define OMAP2_32KSYNCNT_REV_SCHEME (0x3 << 30)
+#define OMAP2_32KSYNCNT_CR_OFF_LOW 0x10
+#define OMAP2_32KSYNCNT_CR_OFF_HIGH 0x30
+
+/*
+ * 32KHz clocksource ... always available, on pretty most chips except
+ * OMAP 730 and 1510. Other timers could be used as clocksources, with
+ * higher resolution in free-running counter modes (e.g. 12 MHz xtal),
+ * but systems won't necessarily want to spend resources that way.
+ */
+static void __iomem *sync32k_cnt_reg;
+
+static u64 notrace omap_32k_read_sched_clock(void)
+{
+ return sync32k_cnt_reg ? readl_relaxed(sync32k_cnt_reg) : 0;
+}
+
+/**
+ * omap_read_persistent_clock64 - Return time from a persistent clock.
+ *
+ * Reads the time from a source which isn't disabled during PM, the
+ * 32k sync timer. Convert the cycles elapsed since last read into
+ * nsecs and adds to a monotonically increasing timespec64.
+ */
+static struct timespec64 persistent_ts;
+static cycles_t cycles;
+static unsigned int persistent_mult, persistent_shift;
+
+static void omap_read_persistent_clock64(struct timespec64 *ts)
+{
+ unsigned long long nsecs;
+ cycles_t last_cycles;
+
+ last_cycles = cycles;
+ cycles = sync32k_cnt_reg ? readl_relaxed(sync32k_cnt_reg) : 0;
+
+ nsecs = clocksource_cyc2ns(cycles - last_cycles,
+ persistent_mult, persistent_shift);
+
+ timespec64_add_ns(&persistent_ts, nsecs);
+
+ *ts = persistent_ts;
+}
+
+/**
+ * omap_init_clocksource_32k - setup and register counter 32k as a
+ * kernel clocksource
+ * @pbase: base addr of counter_32k module
+ * @size: size of counter_32k to map
+ *
+ * Returns 0 upon success or negative error code upon failure.
+ *
+ */
+int __init omap_init_clocksource_32k(void __iomem *vbase)
+{
+ int ret;
+
+ /*
+ * 32k sync Counter IP register offsets vary between the
+ * highlander version and the legacy ones.
+ * The 'SCHEME' bits(30-31) of the revision register is used
+ * to identify the version.
+ */
+ if (readl_relaxed(vbase + OMAP2_32KSYNCNT_REV_OFF) &
+ OMAP2_32KSYNCNT_REV_SCHEME)
+ sync32k_cnt_reg = vbase + OMAP2_32KSYNCNT_CR_OFF_HIGH;
+ else
+ sync32k_cnt_reg = vbase + OMAP2_32KSYNCNT_CR_OFF_LOW;
+
+ /*
+ * 120000 rough estimate from the calculations in
+ * __clocksource_update_freq_scale.
+ */
+ clocks_calc_mult_shift(&persistent_mult, &persistent_shift,
+ 32768, NSEC_PER_SEC, 120000);
+
+ ret = clocksource_mmio_init(sync32k_cnt_reg, "32k_counter", 32768,
+ 250, 32, clocksource_mmio_readl_up);
+ if (ret) {
+ pr_err("32k_counter: can't register clocksource\n");
+ return ret;
+ }
+
+ sched_clock_register(omap_32k_read_sched_clock, 32, 32768);
+ register_persistent_clock(NULL, omap_read_persistent_clock64);
+ pr_info("OMAP clocksource: 32k_counter at 32768 Hz\n");
+
+ return 0;
+}
diff --git a/kernel/arch/arm/plat-omap/debug-leds.c b/kernel/arch/arm/plat-omap/debug-leds.c
new file mode 100644
index 000000000..48b69de89
--- /dev/null
+++ b/kernel/arch/arm/plat-omap/debug-leds.c
@@ -0,0 +1,174 @@
+/*
+ * linux/arch/arm/plat-omap/debug-leds.c
+ *
+ * Copyright 2011 by Bryan Wu <bryan.wu@canonical.com>
+ * Copyright 2003 by Texas Instruments Incorporated
+ *
+ * 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/kernel.h>
+#include <linux/init.h>
+#include <linux/platform_device.h>
+#include <linux/leds.h>
+#include <linux/io.h>
+#include <linux/platform_data/gpio-omap.h>
+#include <linux/slab.h>
+
+#include <asm/mach-types.h>
+
+/* Many OMAP development platforms reuse the same "debug board"; these
+ * platforms include H2, H3, H4, and Perseus2. There are 16 LEDs on the
+ * debug board (all green), accessed through FPGA registers.
+ */
+
+/* NOTE: most boards don't have a static mapping for the FPGA ... */
+struct h2p2_dbg_fpga {
+ /* offset 0x00 */
+ u16 smc91x[8];
+ /* offset 0x10 */
+ u16 fpga_rev;
+ u16 board_rev;
+ u16 gpio_outputs;
+ u16 leds;
+ /* offset 0x18 */
+ u16 misc_inputs;
+ u16 lan_status;
+ u16 lan_reset;
+ u16 reserved0;
+ /* offset 0x20 */
+ u16 ps2_data;
+ u16 ps2_ctrl;
+ /* plus also 4 rs232 ports ... */
+};
+
+static struct h2p2_dbg_fpga __iomem *fpga;
+
+static u16 fpga_led_state;
+
+struct dbg_led {
+ struct led_classdev cdev;
+ u16 mask;
+};
+
+static const struct {
+ const char *name;
+ const char *trigger;
+} dbg_leds[] = {
+ { "dbg:d4", "heartbeat", },
+ { "dbg:d5", "cpu0", },
+ { "dbg:d6", "default-on", },
+ { "dbg:d7", },
+ { "dbg:d8", },
+ { "dbg:d9", },
+ { "dbg:d10", },
+ { "dbg:d11", },
+ { "dbg:d12", },
+ { "dbg:d13", },
+ { "dbg:d14", },
+ { "dbg:d15", },
+ { "dbg:d16", },
+ { "dbg:d17", },
+ { "dbg:d18", },
+ { "dbg:d19", },
+};
+
+/*
+ * The triggers lines up below will only be used if the
+ * LED triggers are compiled in.
+ */
+static void dbg_led_set(struct led_classdev *cdev,
+ enum led_brightness b)
+{
+ struct dbg_led *led = container_of(cdev, struct dbg_led, cdev);
+ u16 reg;
+
+ reg = readw_relaxed(&fpga->leds);
+ if (b != LED_OFF)
+ reg |= led->mask;
+ else
+ reg &= ~led->mask;
+ writew_relaxed(reg, &fpga->leds);
+}
+
+static enum led_brightness dbg_led_get(struct led_classdev *cdev)
+{
+ struct dbg_led *led = container_of(cdev, struct dbg_led, cdev);
+ u16 reg;
+
+ reg = readw_relaxed(&fpga->leds);
+ return (reg & led->mask) ? LED_FULL : LED_OFF;
+}
+
+static int fpga_probe(struct platform_device *pdev)
+{
+ struct resource *iomem;
+ int i;
+
+ iomem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ if (!iomem)
+ return -ENODEV;
+
+ fpga = ioremap(iomem->start, resource_size(iomem));
+ writew_relaxed(0xff, &fpga->leds);
+
+ for (i = 0; i < ARRAY_SIZE(dbg_leds); i++) {
+ struct dbg_led *led;
+
+ led = kzalloc(sizeof(*led), GFP_KERNEL);
+ if (!led)
+ break;
+
+ led->cdev.name = dbg_leds[i].name;
+ led->cdev.brightness_set = dbg_led_set;
+ led->cdev.brightness_get = dbg_led_get;
+ led->cdev.default_trigger = dbg_leds[i].trigger;
+ led->mask = BIT(i);
+
+ if (led_classdev_register(NULL, &led->cdev) < 0) {
+ kfree(led);
+ break;
+ }
+ }
+
+ return 0;
+}
+
+static int fpga_suspend_noirq(struct device *dev)
+{
+ fpga_led_state = readw_relaxed(&fpga->leds);
+ writew_relaxed(0xff, &fpga->leds);
+
+ return 0;
+}
+
+static int fpga_resume_noirq(struct device *dev)
+{
+ writew_relaxed(~fpga_led_state, &fpga->leds);
+ return 0;
+}
+
+static const struct dev_pm_ops fpga_dev_pm_ops = {
+ .suspend_noirq = fpga_suspend_noirq,
+ .resume_noirq = fpga_resume_noirq,
+};
+
+static struct platform_driver led_driver = {
+ .driver.name = "omap_dbg_led",
+ .driver.pm = &fpga_dev_pm_ops,
+ .probe = fpga_probe,
+};
+
+static int __init fpga_init(void)
+{
+ if (machine_is_omap_h4()
+ || machine_is_omap_h3()
+ || machine_is_omap_h2()
+ || machine_is_omap_perseus2()
+ )
+ return platform_driver_register(&led_driver);
+ return 0;
+}
+fs_initcall(fpga_init);
diff --git a/kernel/arch/arm/plat-omap/dma.c b/kernel/arch/arm/plat-omap/dma.c
new file mode 100644
index 000000000..6416e03b4
--- /dev/null
+++ b/kernel/arch/arm/plat-omap/dma.c
@@ -0,0 +1,1466 @@
+/*
+ * linux/arch/arm/plat-omap/dma.c
+ *
+ * Copyright (C) 2003 - 2008 Nokia Corporation
+ * Author: Juha Yrjölä <juha.yrjola@nokia.com>
+ * DMA channel linking for 1610 by Samuel Ortiz <samuel.ortiz@nokia.com>
+ * Graphics DMA and LCD DMA graphics tranformations
+ * by Imre Deak <imre.deak@nokia.com>
+ * OMAP2/3 support Copyright (C) 2004-2007 Texas Instruments, Inc.
+ * Merged to support both OMAP1 and OMAP2 by Tony Lindgren <tony@atomide.com>
+ * Some functions based on earlier dma-omap.c Copyright (C) 2001 RidgeRun, Inc.
+ *
+ * Copyright (C) 2009 Texas Instruments
+ * Added OMAP4 support - Santosh Shilimkar <santosh.shilimkar@ti.com>
+ *
+ * Support functions for the OMAP internal DMA channels.
+ *
+ * Copyright (C) 2010 Texas Instruments Incorporated - http://www.ti.com/
+ * Converted DMA library into DMA platform driver.
+ * - G, Manjunath Kondaiah <manjugk@ti.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/module.h>
+#include <linux/init.h>
+#include <linux/sched.h>
+#include <linux/spinlock.h>
+#include <linux/errno.h>
+#include <linux/interrupt.h>
+#include <linux/irq.h>
+#include <linux/io.h>
+#include <linux/slab.h>
+#include <linux/delay.h>
+
+#include <linux/omap-dma.h>
+
+/*
+ * MAX_LOGICAL_DMA_CH_COUNT: the maximum number of logical DMA
+ * channels that an instance of the SDMA IP block can support. Used
+ * to size arrays. (The actual maximum on a particular SoC may be less
+ * than this -- for example, OMAP1 SDMA instances only support 17 logical
+ * DMA channels.)
+ */
+#define MAX_LOGICAL_DMA_CH_COUNT 32
+
+#undef DEBUG
+
+#ifndef CONFIG_ARCH_OMAP1
+enum { DMA_CH_ALLOC_DONE, DMA_CH_PARAMS_SET_DONE, DMA_CH_STARTED,
+ DMA_CH_QUEUED, DMA_CH_NOTSTARTED, DMA_CH_PAUSED, DMA_CH_LINK_ENABLED
+};
+
+enum { DMA_CHAIN_STARTED, DMA_CHAIN_NOTSTARTED };
+#endif
+
+#define OMAP_DMA_ACTIVE 0x01
+#define OMAP2_DMA_CSR_CLEAR_MASK 0xffffffff
+
+#define OMAP_FUNC_MUX_ARM_BASE (0xfffe1000 + 0xec)
+
+static struct omap_system_dma_plat_info *p;
+static struct omap_dma_dev_attr *d;
+static void omap_clear_dma(int lch);
+static int omap_dma_set_prio_lch(int lch, unsigned char read_prio,
+ unsigned char write_prio);
+static int enable_1510_mode;
+static u32 errata;
+
+static struct omap_dma_global_context_registers {
+ u32 dma_irqenable_l0;
+ u32 dma_irqenable_l1;
+ u32 dma_ocp_sysconfig;
+ u32 dma_gcr;
+} omap_dma_global_context;
+
+struct dma_link_info {
+ int *linked_dmach_q;
+ int no_of_lchs_linked;
+
+ int q_count;
+ int q_tail;
+ int q_head;
+
+ int chain_state;
+ int chain_mode;
+
+};
+
+static struct dma_link_info *dma_linked_lch;
+
+#ifndef CONFIG_ARCH_OMAP1
+
+/* Chain handling macros */
+#define OMAP_DMA_CHAIN_QINIT(chain_id) \
+ do { \
+ dma_linked_lch[chain_id].q_head = \
+ dma_linked_lch[chain_id].q_tail = \
+ dma_linked_lch[chain_id].q_count = 0; \
+ } while (0)
+#define OMAP_DMA_CHAIN_QFULL(chain_id) \
+ (dma_linked_lch[chain_id].no_of_lchs_linked == \
+ dma_linked_lch[chain_id].q_count)
+#define OMAP_DMA_CHAIN_QLAST(chain_id) \
+ do { \
+ ((dma_linked_lch[chain_id].no_of_lchs_linked-1) == \
+ dma_linked_lch[chain_id].q_count) \
+ } while (0)
+#define OMAP_DMA_CHAIN_QEMPTY(chain_id) \
+ (0 == dma_linked_lch[chain_id].q_count)
+#define __OMAP_DMA_CHAIN_INCQ(end) \
+ ((end) = ((end)+1) % dma_linked_lch[chain_id].no_of_lchs_linked)
+#define OMAP_DMA_CHAIN_INCQHEAD(chain_id) \
+ do { \
+ __OMAP_DMA_CHAIN_INCQ(dma_linked_lch[chain_id].q_head); \
+ dma_linked_lch[chain_id].q_count--; \
+ } while (0)
+
+#define OMAP_DMA_CHAIN_INCQTAIL(chain_id) \
+ do { \
+ __OMAP_DMA_CHAIN_INCQ(dma_linked_lch[chain_id].q_tail); \
+ dma_linked_lch[chain_id].q_count++; \
+ } while (0)
+#endif
+
+static int dma_lch_count;
+static int dma_chan_count;
+static int omap_dma_reserve_channels;
+
+static spinlock_t dma_chan_lock;
+static struct omap_dma_lch *dma_chan;
+
+static inline void disable_lnk(int lch);
+static void omap_disable_channel_irq(int lch);
+static inline void omap_enable_channel_irq(int lch);
+
+#define REVISIT_24XX() printk(KERN_ERR "FIXME: no %s on 24xx\n", \
+ __func__);
+
+#ifdef CONFIG_ARCH_OMAP15XX
+/* Returns 1 if the DMA module is in OMAP1510-compatible mode, 0 otherwise */
+static int omap_dma_in_1510_mode(void)
+{
+ return enable_1510_mode;
+}
+#else
+#define omap_dma_in_1510_mode() 0
+#endif
+
+#ifdef CONFIG_ARCH_OMAP1
+static inline void set_gdma_dev(int req, int dev)
+{
+ u32 reg = OMAP_FUNC_MUX_ARM_BASE + ((req - 1) / 5) * 4;
+ int shift = ((req - 1) % 5) * 6;
+ u32 l;
+
+ l = omap_readl(reg);
+ l &= ~(0x3f << shift);
+ l |= (dev - 1) << shift;
+ omap_writel(l, reg);
+}
+#else
+#define set_gdma_dev(req, dev) do {} while (0)
+#define omap_readl(reg) 0
+#define omap_writel(val, reg) do {} while (0)
+#endif
+
+#ifdef CONFIG_ARCH_OMAP1
+void omap_set_dma_priority(int lch, int dst_port, int priority)
+{
+ unsigned long reg;
+ u32 l;
+
+ if (dma_omap1()) {
+ switch (dst_port) {
+ case OMAP_DMA_PORT_OCP_T1: /* FFFECC00 */
+ reg = OMAP_TC_OCPT1_PRIOR;
+ break;
+ case OMAP_DMA_PORT_OCP_T2: /* FFFECCD0 */
+ reg = OMAP_TC_OCPT2_PRIOR;
+ break;
+ case OMAP_DMA_PORT_EMIFF: /* FFFECC08 */
+ reg = OMAP_TC_EMIFF_PRIOR;
+ break;
+ case OMAP_DMA_PORT_EMIFS: /* FFFECC04 */
+ reg = OMAP_TC_EMIFS_PRIOR;
+ break;
+ default:
+ BUG();
+ return;
+ }
+ l = omap_readl(reg);
+ l &= ~(0xf << 8);
+ l |= (priority & 0xf) << 8;
+ omap_writel(l, reg);
+ }
+}
+#endif
+
+#ifdef CONFIG_ARCH_OMAP2PLUS
+void omap_set_dma_priority(int lch, int dst_port, int priority)
+{
+ u32 ccr;
+
+ ccr = p->dma_read(CCR, lch);
+ if (priority)
+ ccr |= (1 << 6);
+ else
+ ccr &= ~(1 << 6);
+ p->dma_write(ccr, CCR, lch);
+}
+#endif
+EXPORT_SYMBOL(omap_set_dma_priority);
+
+void omap_set_dma_transfer_params(int lch, int data_type, int elem_count,
+ int frame_count, int sync_mode,
+ int dma_trigger, int src_or_dst_synch)
+{
+ u32 l;
+
+ l = p->dma_read(CSDP, lch);
+ l &= ~0x03;
+ l |= data_type;
+ p->dma_write(l, CSDP, lch);
+
+ if (dma_omap1()) {
+ u16 ccr;
+
+ ccr = p->dma_read(CCR, lch);
+ ccr &= ~(1 << 5);
+ if (sync_mode == OMAP_DMA_SYNC_FRAME)
+ ccr |= 1 << 5;
+ p->dma_write(ccr, CCR, lch);
+
+ ccr = p->dma_read(CCR2, lch);
+ ccr &= ~(1 << 2);
+ if (sync_mode == OMAP_DMA_SYNC_BLOCK)
+ ccr |= 1 << 2;
+ p->dma_write(ccr, CCR2, lch);
+ }
+
+ if (dma_omap2plus() && dma_trigger) {
+ u32 val;
+
+ val = p->dma_read(CCR, lch);
+
+ /* DMA_SYNCHRO_CONTROL_UPPER depends on the channel number */
+ val &= ~((1 << 23) | (3 << 19) | 0x1f);
+ val |= (dma_trigger & ~0x1f) << 14;
+ val |= dma_trigger & 0x1f;
+
+ if (sync_mode & OMAP_DMA_SYNC_FRAME)
+ val |= 1 << 5;
+ else
+ val &= ~(1 << 5);
+
+ if (sync_mode & OMAP_DMA_SYNC_BLOCK)
+ val |= 1 << 18;
+ else
+ val &= ~(1 << 18);
+
+ if (src_or_dst_synch == OMAP_DMA_DST_SYNC_PREFETCH) {
+ val &= ~(1 << 24); /* dest synch */
+ val |= (1 << 23); /* Prefetch */
+ } else if (src_or_dst_synch) {
+ val |= 1 << 24; /* source synch */
+ } else {
+ val &= ~(1 << 24); /* dest synch */
+ }
+ p->dma_write(val, CCR, lch);
+ }
+
+ p->dma_write(elem_count, CEN, lch);
+ p->dma_write(frame_count, CFN, lch);
+}
+EXPORT_SYMBOL(omap_set_dma_transfer_params);
+
+void omap_set_dma_write_mode(int lch, enum omap_dma_write_mode mode)
+{
+ if (dma_omap2plus()) {
+ u32 csdp;
+
+ csdp = p->dma_read(CSDP, lch);
+ csdp &= ~(0x3 << 16);
+ csdp |= (mode << 16);
+ p->dma_write(csdp, CSDP, lch);
+ }
+}
+EXPORT_SYMBOL(omap_set_dma_write_mode);
+
+void omap_set_dma_channel_mode(int lch, enum omap_dma_channel_mode mode)
+{
+ if (dma_omap1() && !dma_omap15xx()) {
+ u32 l;
+
+ l = p->dma_read(LCH_CTRL, lch);
+ l &= ~0x7;
+ l |= mode;
+ p->dma_write(l, LCH_CTRL, lch);
+ }
+}
+EXPORT_SYMBOL(omap_set_dma_channel_mode);
+
+/* Note that src_port is only for omap1 */
+void omap_set_dma_src_params(int lch, int src_port, int src_amode,
+ unsigned long src_start,
+ int src_ei, int src_fi)
+{
+ u32 l;
+
+ if (dma_omap1()) {
+ u16 w;
+
+ w = p->dma_read(CSDP, lch);
+ w &= ~(0x1f << 2);
+ w |= src_port << 2;
+ p->dma_write(w, CSDP, lch);
+ }
+
+ l = p->dma_read(CCR, lch);
+ l &= ~(0x03 << 12);
+ l |= src_amode << 12;
+ p->dma_write(l, CCR, lch);
+
+ p->dma_write(src_start, CSSA, lch);
+
+ p->dma_write(src_ei, CSEI, lch);
+ p->dma_write(src_fi, CSFI, lch);
+}
+EXPORT_SYMBOL(omap_set_dma_src_params);
+
+void omap_set_dma_params(int lch, struct omap_dma_channel_params *params)
+{
+ omap_set_dma_transfer_params(lch, params->data_type,
+ params->elem_count, params->frame_count,
+ params->sync_mode, params->trigger,
+ params->src_or_dst_synch);
+ omap_set_dma_src_params(lch, params->src_port,
+ params->src_amode, params->src_start,
+ params->src_ei, params->src_fi);
+
+ omap_set_dma_dest_params(lch, params->dst_port,
+ params->dst_amode, params->dst_start,
+ params->dst_ei, params->dst_fi);
+ if (params->read_prio || params->write_prio)
+ omap_dma_set_prio_lch(lch, params->read_prio,
+ params->write_prio);
+}
+EXPORT_SYMBOL(omap_set_dma_params);
+
+void omap_set_dma_src_data_pack(int lch, int enable)
+{
+ u32 l;
+
+ l = p->dma_read(CSDP, lch);
+ l &= ~(1 << 6);
+ if (enable)
+ l |= (1 << 6);
+ p->dma_write(l, CSDP, lch);
+}
+EXPORT_SYMBOL(omap_set_dma_src_data_pack);
+
+void omap_set_dma_src_burst_mode(int lch, enum omap_dma_burst_mode burst_mode)
+{
+ unsigned int burst = 0;
+ u32 l;
+
+ l = p->dma_read(CSDP, lch);
+ l &= ~(0x03 << 7);
+
+ switch (burst_mode) {
+ case OMAP_DMA_DATA_BURST_DIS:
+ break;
+ case OMAP_DMA_DATA_BURST_4:
+ if (dma_omap2plus())
+ burst = 0x1;
+ else
+ burst = 0x2;
+ break;
+ case OMAP_DMA_DATA_BURST_8:
+ if (dma_omap2plus()) {
+ burst = 0x2;
+ break;
+ }
+ /*
+ * not supported by current hardware on OMAP1
+ * w |= (0x03 << 7);
+ * fall through
+ */
+ case OMAP_DMA_DATA_BURST_16:
+ if (dma_omap2plus()) {
+ burst = 0x3;
+ break;
+ }
+ /*
+ * OMAP1 don't support burst 16
+ * fall through
+ */
+ default:
+ BUG();
+ }
+
+ l |= (burst << 7);
+ p->dma_write(l, CSDP, lch);
+}
+EXPORT_SYMBOL(omap_set_dma_src_burst_mode);
+
+/* Note that dest_port is only for OMAP1 */
+void omap_set_dma_dest_params(int lch, int dest_port, int dest_amode,
+ unsigned long dest_start,
+ int dst_ei, int dst_fi)
+{
+ u32 l;
+
+ if (dma_omap1()) {
+ l = p->dma_read(CSDP, lch);
+ l &= ~(0x1f << 9);
+ l |= dest_port << 9;
+ p->dma_write(l, CSDP, lch);
+ }
+
+ l = p->dma_read(CCR, lch);
+ l &= ~(0x03 << 14);
+ l |= dest_amode << 14;
+ p->dma_write(l, CCR, lch);
+
+ p->dma_write(dest_start, CDSA, lch);
+
+ p->dma_write(dst_ei, CDEI, lch);
+ p->dma_write(dst_fi, CDFI, lch);
+}
+EXPORT_SYMBOL(omap_set_dma_dest_params);
+
+void omap_set_dma_dest_data_pack(int lch, int enable)
+{
+ u32 l;
+
+ l = p->dma_read(CSDP, lch);
+ l &= ~(1 << 13);
+ if (enable)
+ l |= 1 << 13;
+ p->dma_write(l, CSDP, lch);
+}
+EXPORT_SYMBOL(omap_set_dma_dest_data_pack);
+
+void omap_set_dma_dest_burst_mode(int lch, enum omap_dma_burst_mode burst_mode)
+{
+ unsigned int burst = 0;
+ u32 l;
+
+ l = p->dma_read(CSDP, lch);
+ l &= ~(0x03 << 14);
+
+ switch (burst_mode) {
+ case OMAP_DMA_DATA_BURST_DIS:
+ break;
+ case OMAP_DMA_DATA_BURST_4:
+ if (dma_omap2plus())
+ burst = 0x1;
+ else
+ burst = 0x2;
+ break;
+ case OMAP_DMA_DATA_BURST_8:
+ if (dma_omap2plus())
+ burst = 0x2;
+ else
+ burst = 0x3;
+ break;
+ case OMAP_DMA_DATA_BURST_16:
+ if (dma_omap2plus()) {
+ burst = 0x3;
+ break;
+ }
+ /*
+ * OMAP1 don't support burst 16
+ * fall through
+ */
+ default:
+ printk(KERN_ERR "Invalid DMA burst mode\n");
+ BUG();
+ return;
+ }
+ l |= (burst << 14);
+ p->dma_write(l, CSDP, lch);
+}
+EXPORT_SYMBOL(omap_set_dma_dest_burst_mode);
+
+static inline void omap_enable_channel_irq(int lch)
+{
+ /* Clear CSR */
+ if (dma_omap1())
+ p->dma_read(CSR, lch);
+ else
+ p->dma_write(OMAP2_DMA_CSR_CLEAR_MASK, CSR, lch);
+
+ /* Enable some nice interrupts. */
+ p->dma_write(dma_chan[lch].enabled_irqs, CICR, lch);
+}
+
+static inline void omap_disable_channel_irq(int lch)
+{
+ /* disable channel interrupts */
+ p->dma_write(0, CICR, lch);
+ /* Clear CSR */
+ if (dma_omap1())
+ p->dma_read(CSR, lch);
+ else
+ p->dma_write(OMAP2_DMA_CSR_CLEAR_MASK, CSR, lch);
+}
+
+void omap_enable_dma_irq(int lch, u16 bits)
+{
+ dma_chan[lch].enabled_irqs |= bits;
+}
+EXPORT_SYMBOL(omap_enable_dma_irq);
+
+void omap_disable_dma_irq(int lch, u16 bits)
+{
+ dma_chan[lch].enabled_irqs &= ~bits;
+}
+EXPORT_SYMBOL(omap_disable_dma_irq);
+
+static inline void enable_lnk(int lch)
+{
+ u32 l;
+
+ l = p->dma_read(CLNK_CTRL, lch);
+
+ if (dma_omap1())
+ l &= ~(1 << 14);
+
+ /* Set the ENABLE_LNK bits */
+ if (dma_chan[lch].next_lch != -1)
+ l = dma_chan[lch].next_lch | (1 << 15);
+
+#ifndef CONFIG_ARCH_OMAP1
+ if (dma_omap2plus())
+ if (dma_chan[lch].next_linked_ch != -1)
+ l = dma_chan[lch].next_linked_ch | (1 << 15);
+#endif
+
+ p->dma_write(l, CLNK_CTRL, lch);
+}
+
+static inline void disable_lnk(int lch)
+{
+ u32 l;
+
+ l = p->dma_read(CLNK_CTRL, lch);
+
+ /* Disable interrupts */
+ omap_disable_channel_irq(lch);
+
+ if (dma_omap1()) {
+ /* Set the STOP_LNK bit */
+ l |= 1 << 14;
+ }
+
+ if (dma_omap2plus()) {
+ /* Clear the ENABLE_LNK bit */
+ l &= ~(1 << 15);
+ }
+
+ p->dma_write(l, CLNK_CTRL, lch);
+ dma_chan[lch].flags &= ~OMAP_DMA_ACTIVE;
+}
+
+static inline void omap2_enable_irq_lch(int lch)
+{
+ u32 val;
+ unsigned long flags;
+
+ if (dma_omap1())
+ return;
+
+ spin_lock_irqsave(&dma_chan_lock, flags);
+ /* clear IRQ STATUS */
+ p->dma_write(1 << lch, IRQSTATUS_L0, lch);
+ /* Enable interrupt */
+ val = p->dma_read(IRQENABLE_L0, lch);
+ val |= 1 << lch;
+ p->dma_write(val, IRQENABLE_L0, lch);
+ spin_unlock_irqrestore(&dma_chan_lock, flags);
+}
+
+static inline void omap2_disable_irq_lch(int lch)
+{
+ u32 val;
+ unsigned long flags;
+
+ if (dma_omap1())
+ return;
+
+ spin_lock_irqsave(&dma_chan_lock, flags);
+ /* Disable interrupt */
+ val = p->dma_read(IRQENABLE_L0, lch);
+ val &= ~(1 << lch);
+ p->dma_write(val, IRQENABLE_L0, lch);
+ /* clear IRQ STATUS */
+ p->dma_write(1 << lch, IRQSTATUS_L0, lch);
+ spin_unlock_irqrestore(&dma_chan_lock, flags);
+}
+
+int omap_request_dma(int dev_id, const char *dev_name,
+ void (*callback)(int lch, u16 ch_status, void *data),
+ void *data, int *dma_ch_out)
+{
+ int ch, free_ch = -1;
+ unsigned long flags;
+ struct omap_dma_lch *chan;
+
+ WARN(strcmp(dev_name, "DMA engine"), "Using deprecated platform DMA API - please update to DMA engine");
+
+ spin_lock_irqsave(&dma_chan_lock, flags);
+ for (ch = 0; ch < dma_chan_count; ch++) {
+ if (free_ch == -1 && dma_chan[ch].dev_id == -1) {
+ free_ch = ch;
+ /* Exit after first free channel found */
+ break;
+ }
+ }
+ if (free_ch == -1) {
+ spin_unlock_irqrestore(&dma_chan_lock, flags);
+ return -EBUSY;
+ }
+ chan = dma_chan + free_ch;
+ chan->dev_id = dev_id;
+
+ if (p->clear_lch_regs)
+ p->clear_lch_regs(free_ch);
+
+ if (dma_omap2plus())
+ omap_clear_dma(free_ch);
+
+ spin_unlock_irqrestore(&dma_chan_lock, flags);
+
+ chan->dev_name = dev_name;
+ chan->callback = callback;
+ chan->data = data;
+ chan->flags = 0;
+
+#ifndef CONFIG_ARCH_OMAP1
+ if (dma_omap2plus()) {
+ chan->chain_id = -1;
+ chan->next_linked_ch = -1;
+ }
+#endif
+
+ chan->enabled_irqs = OMAP_DMA_DROP_IRQ | OMAP_DMA_BLOCK_IRQ;
+
+ if (dma_omap1())
+ chan->enabled_irqs |= OMAP1_DMA_TOUT_IRQ;
+ else if (dma_omap2plus())
+ chan->enabled_irqs |= OMAP2_DMA_MISALIGNED_ERR_IRQ |
+ OMAP2_DMA_TRANS_ERR_IRQ;
+
+ if (dma_omap16xx()) {
+ /* If the sync device is set, configure it dynamically. */
+ if (dev_id != 0) {
+ set_gdma_dev(free_ch + 1, dev_id);
+ dev_id = free_ch + 1;
+ }
+ /*
+ * Disable the 1510 compatibility mode and set the sync device
+ * id.
+ */
+ p->dma_write(dev_id | (1 << 10), CCR, free_ch);
+ } else if (dma_omap1()) {
+ p->dma_write(dev_id, CCR, free_ch);
+ }
+
+ if (dma_omap2plus()) {
+ omap_enable_channel_irq(free_ch);
+ omap2_enable_irq_lch(free_ch);
+ }
+
+ *dma_ch_out = free_ch;
+
+ return 0;
+}
+EXPORT_SYMBOL(omap_request_dma);
+
+void omap_free_dma(int lch)
+{
+ unsigned long flags;
+
+ if (dma_chan[lch].dev_id == -1) {
+ pr_err("omap_dma: trying to free unallocated DMA channel %d\n",
+ lch);
+ return;
+ }
+
+ /* Disable interrupt for logical channel */
+ if (dma_omap2plus())
+ omap2_disable_irq_lch(lch);
+
+ /* Disable all DMA interrupts for the channel. */
+ omap_disable_channel_irq(lch);
+
+ /* Make sure the DMA transfer is stopped. */
+ p->dma_write(0, CCR, lch);
+
+ /* Clear registers */
+ if (dma_omap2plus())
+ omap_clear_dma(lch);
+
+ spin_lock_irqsave(&dma_chan_lock, flags);
+ dma_chan[lch].dev_id = -1;
+ dma_chan[lch].next_lch = -1;
+ dma_chan[lch].callback = NULL;
+ spin_unlock_irqrestore(&dma_chan_lock, flags);
+}
+EXPORT_SYMBOL(omap_free_dma);
+
+/**
+ * @brief omap_dma_set_global_params : Set global priority settings for dma
+ *
+ * @param arb_rate
+ * @param max_fifo_depth
+ * @param tparams - Number of threads to reserve : DMA_THREAD_RESERVE_NORM
+ * DMA_THREAD_RESERVE_ONET
+ * DMA_THREAD_RESERVE_TWOT
+ * DMA_THREAD_RESERVE_THREET
+ */
+void
+omap_dma_set_global_params(int arb_rate, int max_fifo_depth, int tparams)
+{
+ u32 reg;
+
+ if (dma_omap1()) {
+ printk(KERN_ERR "FIXME: no %s on 15xx/16xx\n", __func__);
+ return;
+ }
+
+ if (max_fifo_depth == 0)
+ max_fifo_depth = 1;
+ if (arb_rate == 0)
+ arb_rate = 1;
+
+ reg = 0xff & max_fifo_depth;
+ reg |= (0x3 & tparams) << 12;
+ reg |= (arb_rate & 0xff) << 16;
+
+ p->dma_write(reg, GCR, 0);
+}
+EXPORT_SYMBOL(omap_dma_set_global_params);
+
+/**
+ * @brief omap_dma_set_prio_lch : Set channel wise priority settings
+ *
+ * @param lch
+ * @param read_prio - Read priority
+ * @param write_prio - Write priority
+ * Both of the above can be set with one of the following values :
+ * DMA_CH_PRIO_HIGH/DMA_CH_PRIO_LOW
+ */
+static int
+omap_dma_set_prio_lch(int lch, unsigned char read_prio,
+ unsigned char write_prio)
+{
+ u32 l;
+
+ if (unlikely((lch < 0 || lch >= dma_lch_count))) {
+ printk(KERN_ERR "Invalid channel id\n");
+ return -EINVAL;
+ }
+ l = p->dma_read(CCR, lch);
+ l &= ~((1 << 6) | (1 << 26));
+ if (d->dev_caps & IS_RW_PRIORITY)
+ l |= ((read_prio & 0x1) << 6) | ((write_prio & 0x1) << 26);
+ else
+ l |= ((read_prio & 0x1) << 6);
+
+ p->dma_write(l, CCR, lch);
+
+ return 0;
+}
+
+
+/*
+ * Clears any DMA state so the DMA engine is ready to restart with new buffers
+ * through omap_start_dma(). Any buffers in flight are discarded.
+ */
+static void omap_clear_dma(int lch)
+{
+ unsigned long flags;
+
+ local_irq_save(flags);
+ p->clear_dma(lch);
+ local_irq_restore(flags);
+}
+
+void omap_start_dma(int lch)
+{
+ u32 l;
+
+ /*
+ * The CPC/CDAC register needs to be initialized to zero
+ * before starting dma transfer.
+ */
+ if (dma_omap15xx())
+ p->dma_write(0, CPC, lch);
+ else
+ p->dma_write(0, CDAC, lch);
+
+ if (!omap_dma_in_1510_mode() && dma_chan[lch].next_lch != -1) {
+ int next_lch, cur_lch;
+ char dma_chan_link_map[MAX_LOGICAL_DMA_CH_COUNT];
+
+ /* Set the link register of the first channel */
+ enable_lnk(lch);
+
+ memset(dma_chan_link_map, 0, sizeof(dma_chan_link_map));
+ dma_chan_link_map[lch] = 1;
+
+ cur_lch = dma_chan[lch].next_lch;
+ do {
+ next_lch = dma_chan[cur_lch].next_lch;
+
+ /* The loop case: we've been here already */
+ if (dma_chan_link_map[cur_lch])
+ break;
+ /* Mark the current channel */
+ dma_chan_link_map[cur_lch] = 1;
+
+ enable_lnk(cur_lch);
+ omap_enable_channel_irq(cur_lch);
+
+ cur_lch = next_lch;
+ } while (next_lch != -1);
+ } else if (IS_DMA_ERRATA(DMA_ERRATA_PARALLEL_CHANNELS))
+ p->dma_write(lch, CLNK_CTRL, lch);
+
+ omap_enable_channel_irq(lch);
+
+ l = p->dma_read(CCR, lch);
+
+ if (IS_DMA_ERRATA(DMA_ERRATA_IFRAME_BUFFERING))
+ l |= OMAP_DMA_CCR_BUFFERING_DISABLE;
+ l |= OMAP_DMA_CCR_EN;
+
+ /*
+ * As dma_write() uses IO accessors which are weakly ordered, there
+ * is no guarantee that data in coherent DMA memory will be visible
+ * to the DMA device. Add a memory barrier here to ensure that any
+ * such data is visible prior to enabling DMA.
+ */
+ mb();
+ p->dma_write(l, CCR, lch);
+
+ dma_chan[lch].flags |= OMAP_DMA_ACTIVE;
+}
+EXPORT_SYMBOL(omap_start_dma);
+
+void omap_stop_dma(int lch)
+{
+ u32 l;
+
+ /* Disable all interrupts on the channel */
+ omap_disable_channel_irq(lch);
+
+ l = p->dma_read(CCR, lch);
+ if (IS_DMA_ERRATA(DMA_ERRATA_i541) &&
+ (l & OMAP_DMA_CCR_SEL_SRC_DST_SYNC)) {
+ int i = 0;
+ u32 sys_cf;
+
+ /* Configure No-Standby */
+ l = p->dma_read(OCP_SYSCONFIG, lch);
+ sys_cf = l;
+ l &= ~DMA_SYSCONFIG_MIDLEMODE_MASK;
+ l |= DMA_SYSCONFIG_MIDLEMODE(DMA_IDLEMODE_NO_IDLE);
+ p->dma_write(l , OCP_SYSCONFIG, 0);
+
+ l = p->dma_read(CCR, lch);
+ l &= ~OMAP_DMA_CCR_EN;
+ p->dma_write(l, CCR, lch);
+
+ /* Wait for sDMA FIFO drain */
+ l = p->dma_read(CCR, lch);
+ while (i < 100 && (l & (OMAP_DMA_CCR_RD_ACTIVE |
+ OMAP_DMA_CCR_WR_ACTIVE))) {
+ udelay(5);
+ i++;
+ l = p->dma_read(CCR, lch);
+ }
+ if (i >= 100)
+ pr_err("DMA drain did not complete on lch %d\n", lch);
+ /* Restore OCP_SYSCONFIG */
+ p->dma_write(sys_cf, OCP_SYSCONFIG, lch);
+ } else {
+ l &= ~OMAP_DMA_CCR_EN;
+ p->dma_write(l, CCR, lch);
+ }
+
+ /*
+ * Ensure that data transferred by DMA is visible to any access
+ * after DMA has been disabled. This is important for coherent
+ * DMA regions.
+ */
+ mb();
+
+ if (!omap_dma_in_1510_mode() && dma_chan[lch].next_lch != -1) {
+ int next_lch, cur_lch = lch;
+ char dma_chan_link_map[MAX_LOGICAL_DMA_CH_COUNT];
+
+ memset(dma_chan_link_map, 0, sizeof(dma_chan_link_map));
+ do {
+ /* The loop case: we've been here already */
+ if (dma_chan_link_map[cur_lch])
+ break;
+ /* Mark the current channel */
+ dma_chan_link_map[cur_lch] = 1;
+
+ disable_lnk(cur_lch);
+
+ next_lch = dma_chan[cur_lch].next_lch;
+ cur_lch = next_lch;
+ } while (next_lch != -1);
+ }
+
+ dma_chan[lch].flags &= ~OMAP_DMA_ACTIVE;
+}
+EXPORT_SYMBOL(omap_stop_dma);
+
+/*
+ * Allows changing the DMA callback function or data. This may be needed if
+ * the driver shares a single DMA channel for multiple dma triggers.
+ */
+int omap_set_dma_callback(int lch,
+ void (*callback)(int lch, u16 ch_status, void *data),
+ void *data)
+{
+ unsigned long flags;
+
+ if (lch < 0)
+ return -ENODEV;
+
+ spin_lock_irqsave(&dma_chan_lock, flags);
+ if (dma_chan[lch].dev_id == -1) {
+ printk(KERN_ERR "DMA callback for not set for free channel\n");
+ spin_unlock_irqrestore(&dma_chan_lock, flags);
+ return -EINVAL;
+ }
+ dma_chan[lch].callback = callback;
+ dma_chan[lch].data = data;
+ spin_unlock_irqrestore(&dma_chan_lock, flags);
+
+ return 0;
+}
+EXPORT_SYMBOL(omap_set_dma_callback);
+
+/*
+ * Returns current physical source address for the given DMA channel.
+ * If the channel is running the caller must disable interrupts prior calling
+ * this function and process the returned value before re-enabling interrupt to
+ * prevent races with the interrupt handler. Note that in continuous mode there
+ * is a chance for CSSA_L register overflow between the two reads resulting
+ * in incorrect return value.
+ */
+dma_addr_t omap_get_dma_src_pos(int lch)
+{
+ dma_addr_t offset = 0;
+
+ if (dma_omap15xx())
+ offset = p->dma_read(CPC, lch);
+ else
+ offset = p->dma_read(CSAC, lch);
+
+ if (IS_DMA_ERRATA(DMA_ERRATA_3_3) && offset == 0)
+ offset = p->dma_read(CSAC, lch);
+
+ if (!dma_omap15xx()) {
+ /*
+ * CDAC == 0 indicates that the DMA transfer on the channel has
+ * not been started (no data has been transferred so far).
+ * Return the programmed source start address in this case.
+ */
+ if (likely(p->dma_read(CDAC, lch)))
+ offset = p->dma_read(CSAC, lch);
+ else
+ offset = p->dma_read(CSSA, lch);
+ }
+
+ if (dma_omap1())
+ offset |= (p->dma_read(CSSA, lch) & 0xFFFF0000);
+
+ return offset;
+}
+EXPORT_SYMBOL(omap_get_dma_src_pos);
+
+/*
+ * Returns current physical destination address for the given DMA channel.
+ * If the channel is running the caller must disable interrupts prior calling
+ * this function and process the returned value before re-enabling interrupt to
+ * prevent races with the interrupt handler. Note that in continuous mode there
+ * is a chance for CDSA_L register overflow between the two reads resulting
+ * in incorrect return value.
+ */
+dma_addr_t omap_get_dma_dst_pos(int lch)
+{
+ dma_addr_t offset = 0;
+
+ if (dma_omap15xx())
+ offset = p->dma_read(CPC, lch);
+ else
+ offset = p->dma_read(CDAC, lch);
+
+ /*
+ * omap 3.2/3.3 erratum: sometimes 0 is returned if CSAC/CDAC is
+ * read before the DMA controller finished disabling the channel.
+ */
+ if (!dma_omap15xx() && offset == 0) {
+ offset = p->dma_read(CDAC, lch);
+ /*
+ * CDAC == 0 indicates that the DMA transfer on the channel has
+ * not been started (no data has been transferred so far).
+ * Return the programmed destination start address in this case.
+ */
+ if (unlikely(!offset))
+ offset = p->dma_read(CDSA, lch);
+ }
+
+ if (dma_omap1())
+ offset |= (p->dma_read(CDSA, lch) & 0xFFFF0000);
+
+ return offset;
+}
+EXPORT_SYMBOL(omap_get_dma_dst_pos);
+
+int omap_get_dma_active_status(int lch)
+{
+ return (p->dma_read(CCR, lch) & OMAP_DMA_CCR_EN) != 0;
+}
+EXPORT_SYMBOL(omap_get_dma_active_status);
+
+int omap_dma_running(void)
+{
+ int lch;
+
+ if (dma_omap1())
+ if (omap_lcd_dma_running())
+ return 1;
+
+ for (lch = 0; lch < dma_chan_count; lch++)
+ if (p->dma_read(CCR, lch) & OMAP_DMA_CCR_EN)
+ return 1;
+
+ return 0;
+}
+
+/*
+ * lch_queue DMA will start right after lch_head one is finished.
+ * For this DMA link to start, you still need to start (see omap_start_dma)
+ * the first one. That will fire up the entire queue.
+ */
+void omap_dma_link_lch(int lch_head, int lch_queue)
+{
+ if (omap_dma_in_1510_mode()) {
+ if (lch_head == lch_queue) {
+ p->dma_write(p->dma_read(CCR, lch_head) | (3 << 8),
+ CCR, lch_head);
+ return;
+ }
+ printk(KERN_ERR "DMA linking is not supported in 1510 mode\n");
+ BUG();
+ return;
+ }
+
+ if ((dma_chan[lch_head].dev_id == -1) ||
+ (dma_chan[lch_queue].dev_id == -1)) {
+ pr_err("omap_dma: trying to link non requested channels\n");
+ dump_stack();
+ }
+
+ dma_chan[lch_head].next_lch = lch_queue;
+}
+EXPORT_SYMBOL(omap_dma_link_lch);
+
+/*----------------------------------------------------------------------------*/
+
+#ifdef CONFIG_ARCH_OMAP1
+
+static int omap1_dma_handle_ch(int ch)
+{
+ u32 csr;
+
+ if (enable_1510_mode && ch >= 6) {
+ csr = dma_chan[ch].saved_csr;
+ dma_chan[ch].saved_csr = 0;
+ } else
+ csr = p->dma_read(CSR, ch);
+ if (enable_1510_mode && ch <= 2 && (csr >> 7) != 0) {
+ dma_chan[ch + 6].saved_csr = csr >> 7;
+ csr &= 0x7f;
+ }
+ if ((csr & 0x3f) == 0)
+ return 0;
+ if (unlikely(dma_chan[ch].dev_id == -1)) {
+ pr_warn("Spurious interrupt from DMA channel %d (CSR %04x)\n",
+ ch, csr);
+ return 0;
+ }
+ if (unlikely(csr & OMAP1_DMA_TOUT_IRQ))
+ pr_warn("DMA timeout with device %d\n", dma_chan[ch].dev_id);
+ if (unlikely(csr & OMAP_DMA_DROP_IRQ))
+ pr_warn("DMA synchronization event drop occurred with device %d\n",
+ dma_chan[ch].dev_id);
+ if (likely(csr & OMAP_DMA_BLOCK_IRQ))
+ dma_chan[ch].flags &= ~OMAP_DMA_ACTIVE;
+ if (likely(dma_chan[ch].callback != NULL))
+ dma_chan[ch].callback(ch, csr, dma_chan[ch].data);
+
+ return 1;
+}
+
+static irqreturn_t omap1_dma_irq_handler(int irq, void *dev_id)
+{
+ int ch = ((int) dev_id) - 1;
+ int handled = 0;
+
+ for (;;) {
+ int handled_now = 0;
+
+ handled_now += omap1_dma_handle_ch(ch);
+ if (enable_1510_mode && dma_chan[ch + 6].saved_csr)
+ handled_now += omap1_dma_handle_ch(ch + 6);
+ if (!handled_now)
+ break;
+ handled += handled_now;
+ }
+
+ return handled ? IRQ_HANDLED : IRQ_NONE;
+}
+
+#else
+#define omap1_dma_irq_handler NULL
+#endif
+
+#ifdef CONFIG_ARCH_OMAP2PLUS
+
+static int omap2_dma_handle_ch(int ch)
+{
+ u32 status = p->dma_read(CSR, ch);
+
+ if (!status) {
+ if (printk_ratelimit())
+ pr_warn("Spurious DMA IRQ for lch %d\n", ch);
+ p->dma_write(1 << ch, IRQSTATUS_L0, ch);
+ return 0;
+ }
+ if (unlikely(dma_chan[ch].dev_id == -1)) {
+ if (printk_ratelimit())
+ pr_warn("IRQ %04x for non-allocated DMA channel %d\n",
+ status, ch);
+ return 0;
+ }
+ if (unlikely(status & OMAP_DMA_DROP_IRQ))
+ pr_info("DMA synchronization event drop occurred with device %d\n",
+ dma_chan[ch].dev_id);
+ if (unlikely(status & OMAP2_DMA_TRANS_ERR_IRQ)) {
+ printk(KERN_INFO "DMA transaction error with device %d\n",
+ dma_chan[ch].dev_id);
+ if (IS_DMA_ERRATA(DMA_ERRATA_i378)) {
+ u32 ccr;
+
+ ccr = p->dma_read(CCR, ch);
+ ccr &= ~OMAP_DMA_CCR_EN;
+ p->dma_write(ccr, CCR, ch);
+ dma_chan[ch].flags &= ~OMAP_DMA_ACTIVE;
+ }
+ }
+ if (unlikely(status & OMAP2_DMA_SECURE_ERR_IRQ))
+ printk(KERN_INFO "DMA secure error with device %d\n",
+ dma_chan[ch].dev_id);
+ if (unlikely(status & OMAP2_DMA_MISALIGNED_ERR_IRQ))
+ printk(KERN_INFO "DMA misaligned error with device %d\n",
+ dma_chan[ch].dev_id);
+
+ p->dma_write(status, CSR, ch);
+ p->dma_write(1 << ch, IRQSTATUS_L0, ch);
+ /* read back the register to flush the write */
+ p->dma_read(IRQSTATUS_L0, ch);
+
+ /* If the ch is not chained then chain_id will be -1 */
+ if (dma_chan[ch].chain_id != -1) {
+ int chain_id = dma_chan[ch].chain_id;
+ dma_chan[ch].state = DMA_CH_NOTSTARTED;
+ if (p->dma_read(CLNK_CTRL, ch) & (1 << 15))
+ dma_chan[dma_chan[ch].next_linked_ch].state =
+ DMA_CH_STARTED;
+ if (dma_linked_lch[chain_id].chain_mode ==
+ OMAP_DMA_DYNAMIC_CHAIN)
+ disable_lnk(ch);
+
+ if (!OMAP_DMA_CHAIN_QEMPTY(chain_id))
+ OMAP_DMA_CHAIN_INCQHEAD(chain_id);
+
+ status = p->dma_read(CSR, ch);
+ p->dma_write(status, CSR, ch);
+ }
+
+ if (likely(dma_chan[ch].callback != NULL))
+ dma_chan[ch].callback(ch, status, dma_chan[ch].data);
+
+ return 0;
+}
+
+/* STATUS register count is from 1-32 while our is 0-31 */
+static irqreturn_t omap2_dma_irq_handler(int irq, void *dev_id)
+{
+ u32 val, enable_reg;
+ int i;
+
+ val = p->dma_read(IRQSTATUS_L0, 0);
+ if (val == 0) {
+ if (printk_ratelimit())
+ printk(KERN_WARNING "Spurious DMA IRQ\n");
+ return IRQ_HANDLED;
+ }
+ enable_reg = p->dma_read(IRQENABLE_L0, 0);
+ val &= enable_reg; /* Dispatch only relevant interrupts */
+ for (i = 0; i < dma_lch_count && val != 0; i++) {
+ if (val & 1)
+ omap2_dma_handle_ch(i);
+ val >>= 1;
+ }
+
+ return IRQ_HANDLED;
+}
+
+static struct irqaction omap24xx_dma_irq = {
+ .name = "DMA",
+ .handler = omap2_dma_irq_handler,
+};
+
+#else
+static struct irqaction omap24xx_dma_irq;
+#endif
+
+/*----------------------------------------------------------------------------*/
+
+/*
+ * Note that we are currently using only IRQENABLE_L0 and L1.
+ * As the DSP may be using IRQENABLE_L2 and L3, let's not
+ * touch those for now.
+ */
+void omap_dma_global_context_save(void)
+{
+ omap_dma_global_context.dma_irqenable_l0 =
+ p->dma_read(IRQENABLE_L0, 0);
+ omap_dma_global_context.dma_irqenable_l1 =
+ p->dma_read(IRQENABLE_L1, 0);
+ omap_dma_global_context.dma_ocp_sysconfig =
+ p->dma_read(OCP_SYSCONFIG, 0);
+ omap_dma_global_context.dma_gcr = p->dma_read(GCR, 0);
+}
+
+void omap_dma_global_context_restore(void)
+{
+ int ch;
+
+ p->dma_write(omap_dma_global_context.dma_gcr, GCR, 0);
+ p->dma_write(omap_dma_global_context.dma_ocp_sysconfig,
+ OCP_SYSCONFIG, 0);
+ p->dma_write(omap_dma_global_context.dma_irqenable_l0,
+ IRQENABLE_L0, 0);
+ p->dma_write(omap_dma_global_context.dma_irqenable_l1,
+ IRQENABLE_L1, 0);
+
+ if (IS_DMA_ERRATA(DMA_ROMCODE_BUG))
+ p->dma_write(0x3 , IRQSTATUS_L0, 0);
+
+ for (ch = 0; ch < dma_chan_count; ch++)
+ if (dma_chan[ch].dev_id != -1)
+ omap_clear_dma(ch);
+}
+
+struct omap_system_dma_plat_info *omap_get_plat_info(void)
+{
+ return p;
+}
+EXPORT_SYMBOL_GPL(omap_get_plat_info);
+
+static int omap_system_dma_probe(struct platform_device *pdev)
+{
+ int ch, ret = 0;
+ int dma_irq;
+ char irq_name[4];
+ int irq_rel;
+
+ p = pdev->dev.platform_data;
+ if (!p) {
+ dev_err(&pdev->dev,
+ "%s: System DMA initialized without platform data\n",
+ __func__);
+ return -EINVAL;
+ }
+
+ d = p->dma_attr;
+ errata = p->errata;
+
+ if ((d->dev_caps & RESERVE_CHANNEL) && omap_dma_reserve_channels
+ && (omap_dma_reserve_channels < d->lch_count))
+ d->lch_count = omap_dma_reserve_channels;
+
+ dma_lch_count = d->lch_count;
+ dma_chan_count = dma_lch_count;
+ enable_1510_mode = d->dev_caps & ENABLE_1510_MODE;
+
+ dma_chan = devm_kcalloc(&pdev->dev, dma_lch_count,
+ sizeof(struct omap_dma_lch), GFP_KERNEL);
+ if (!dma_chan) {
+ dev_err(&pdev->dev, "%s: kzalloc fail\n", __func__);
+ return -ENOMEM;
+ }
+
+
+ if (dma_omap2plus()) {
+ dma_linked_lch = kzalloc(sizeof(struct dma_link_info) *
+ dma_lch_count, GFP_KERNEL);
+ if (!dma_linked_lch) {
+ ret = -ENOMEM;
+ goto exit_dma_lch_fail;
+ }
+ }
+
+ spin_lock_init(&dma_chan_lock);
+ for (ch = 0; ch < dma_chan_count; ch++) {
+ omap_clear_dma(ch);
+ if (dma_omap2plus())
+ omap2_disable_irq_lch(ch);
+
+ dma_chan[ch].dev_id = -1;
+ dma_chan[ch].next_lch = -1;
+
+ if (ch >= 6 && enable_1510_mode)
+ continue;
+
+ if (dma_omap1()) {
+ /*
+ * request_irq() doesn't like dev_id (ie. ch) being
+ * zero, so we have to kludge around this.
+ */
+ sprintf(&irq_name[0], "%d", ch);
+ dma_irq = platform_get_irq_byname(pdev, irq_name);
+
+ if (dma_irq < 0) {
+ ret = dma_irq;
+ goto exit_dma_irq_fail;
+ }
+
+ /* INT_DMA_LCD is handled in lcd_dma.c */
+ if (dma_irq == INT_DMA_LCD)
+ continue;
+
+ ret = request_irq(dma_irq,
+ omap1_dma_irq_handler, 0, "DMA",
+ (void *) (ch + 1));
+ if (ret != 0)
+ goto exit_dma_irq_fail;
+ }
+ }
+
+ if (d->dev_caps & IS_RW_PRIORITY)
+ omap_dma_set_global_params(DMA_DEFAULT_ARB_RATE,
+ DMA_DEFAULT_FIFO_DEPTH, 0);
+
+ if (dma_omap2plus() && !(d->dev_caps & DMA_ENGINE_HANDLE_IRQ)) {
+ strcpy(irq_name, "0");
+ dma_irq = platform_get_irq_byname(pdev, irq_name);
+ if (dma_irq < 0) {
+ dev_err(&pdev->dev, "failed: request IRQ %d", dma_irq);
+ ret = dma_irq;
+ goto exit_dma_lch_fail;
+ }
+ ret = setup_irq(dma_irq, &omap24xx_dma_irq);
+ if (ret) {
+ dev_err(&pdev->dev, "set_up failed for IRQ %d for DMA (error %d)\n",
+ dma_irq, ret);
+ goto exit_dma_lch_fail;
+ }
+ }
+
+ /* reserve dma channels 0 and 1 in high security devices on 34xx */
+ if (d->dev_caps & HS_CHANNELS_RESERVED) {
+ pr_info("Reserving DMA channels 0 and 1 for HS ROM code\n");
+ dma_chan[0].dev_id = 0;
+ dma_chan[1].dev_id = 1;
+ }
+ p->show_dma_caps();
+ return 0;
+
+exit_dma_irq_fail:
+ dev_err(&pdev->dev, "unable to request IRQ %d for DMA (error %d)\n",
+ dma_irq, ret);
+ for (irq_rel = 0; irq_rel < ch; irq_rel++) {
+ dma_irq = platform_get_irq(pdev, irq_rel);
+ free_irq(dma_irq, (void *)(irq_rel + 1));
+ }
+
+exit_dma_lch_fail:
+ return ret;
+}
+
+static int omap_system_dma_remove(struct platform_device *pdev)
+{
+ int dma_irq;
+
+ if (dma_omap2plus()) {
+ char irq_name[4];
+ strcpy(irq_name, "0");
+ dma_irq = platform_get_irq_byname(pdev, irq_name);
+ if (dma_irq >= 0)
+ remove_irq(dma_irq, &omap24xx_dma_irq);
+ } else {
+ int irq_rel = 0;
+ for ( ; irq_rel < dma_chan_count; irq_rel++) {
+ dma_irq = platform_get_irq(pdev, irq_rel);
+ free_irq(dma_irq, (void *)(irq_rel + 1));
+ }
+ }
+ return 0;
+}
+
+static struct platform_driver omap_system_dma_driver = {
+ .probe = omap_system_dma_probe,
+ .remove = omap_system_dma_remove,
+ .driver = {
+ .name = "omap_dma_system"
+ },
+};
+
+static int __init omap_system_dma_init(void)
+{
+ return platform_driver_register(&omap_system_dma_driver);
+}
+arch_initcall(omap_system_dma_init);
+
+static void __exit omap_system_dma_exit(void)
+{
+ platform_driver_unregister(&omap_system_dma_driver);
+}
+
+MODULE_DESCRIPTION("OMAP SYSTEM DMA DRIVER");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:" DRIVER_NAME);
+MODULE_AUTHOR("Texas Instruments Inc");
+
+/*
+ * Reserve the omap SDMA channels using cmdline bootarg
+ * "omap_dma_reserve_ch=". The valid range is 1 to 32
+ */
+static int __init omap_dma_cmdline_reserve_ch(char *str)
+{
+ if (get_option(&str, &omap_dma_reserve_channels) != 1)
+ omap_dma_reserve_channels = 0;
+ return 1;
+}
+
+__setup("omap_dma_reserve_ch=", omap_dma_cmdline_reserve_ch);
+
+
diff --git a/kernel/arch/arm/plat-omap/dmtimer.c b/kernel/arch/arm/plat-omap/dmtimer.c
new file mode 100644
index 000000000..8ca94d379
--- /dev/null
+++ b/kernel/arch/arm/plat-omap/dmtimer.c
@@ -0,0 +1,965 @@
+/*
+ * linux/arch/arm/plat-omap/dmtimer.c
+ *
+ * OMAP Dual-Mode Timers
+ *
+ * Copyright (C) 2010 Texas Instruments Incorporated - http://www.ti.com/
+ * Tarun Kanti DebBarma <tarun.kanti@ti.com>
+ * Thara Gopinath <thara@ti.com>
+ *
+ * dmtimer adaptation to platform_driver.
+ *
+ * Copyright (C) 2005 Nokia Corporation
+ * OMAP2 support by Juha Yrjola
+ * API improvements and OMAP2 clock framework support by Timo Teras
+ *
+ * Copyright (C) 2009 Texas Instruments
+ * Added OMAP4 support - Santosh Shilimkar <santosh.shilimkar@ti.com>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.
+ *
+ * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
+ * NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#include <linux/clk.h>
+#include <linux/module.h>
+#include <linux/io.h>
+#include <linux/device.h>
+#include <linux/err.h>
+#include <linux/pm_runtime.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
+#include <linux/platform_device.h>
+#include <linux/platform_data/dmtimer-omap.h>
+
+#include <plat/dmtimer.h>
+
+static u32 omap_reserved_systimers;
+static LIST_HEAD(omap_timer_list);
+static DEFINE_SPINLOCK(dm_timer_lock);
+
+enum {
+ REQUEST_ANY = 0,
+ REQUEST_BY_ID,
+ REQUEST_BY_CAP,
+ REQUEST_BY_NODE,
+};
+
+/**
+ * omap_dm_timer_read_reg - read timer registers in posted and non-posted mode
+ * @timer: timer pointer over which read operation to perform
+ * @reg: lowest byte holds the register offset
+ *
+ * The posted mode bit is encoded in reg. Note that in posted mode write
+ * pending bit must be checked. Otherwise a read of a non completed write
+ * will produce an error.
+ */
+static inline u32 omap_dm_timer_read_reg(struct omap_dm_timer *timer, u32 reg)
+{
+ WARN_ON((reg & 0xff) < _OMAP_TIMER_WAKEUP_EN_OFFSET);
+ return __omap_dm_timer_read(timer, reg, timer->posted);
+}
+
+/**
+ * omap_dm_timer_write_reg - write timer registers in posted and non-posted mode
+ * @timer: timer pointer over which write operation is to perform
+ * @reg: lowest byte holds the register offset
+ * @value: data to write into the register
+ *
+ * The posted mode bit is encoded in reg. Note that in posted mode the write
+ * pending bit must be checked. Otherwise a write on a register which has a
+ * pending write will be lost.
+ */
+static void omap_dm_timer_write_reg(struct omap_dm_timer *timer, u32 reg,
+ u32 value)
+{
+ WARN_ON((reg & 0xff) < _OMAP_TIMER_WAKEUP_EN_OFFSET);
+ __omap_dm_timer_write(timer, reg, value, timer->posted);
+}
+
+static void omap_timer_restore_context(struct omap_dm_timer *timer)
+{
+ omap_dm_timer_write_reg(timer, OMAP_TIMER_WAKEUP_EN_REG,
+ timer->context.twer);
+ omap_dm_timer_write_reg(timer, OMAP_TIMER_COUNTER_REG,
+ timer->context.tcrr);
+ omap_dm_timer_write_reg(timer, OMAP_TIMER_LOAD_REG,
+ timer->context.tldr);
+ omap_dm_timer_write_reg(timer, OMAP_TIMER_MATCH_REG,
+ timer->context.tmar);
+ omap_dm_timer_write_reg(timer, OMAP_TIMER_IF_CTRL_REG,
+ timer->context.tsicr);
+ writel_relaxed(timer->context.tier, timer->irq_ena);
+ omap_dm_timer_write_reg(timer, OMAP_TIMER_CTRL_REG,
+ timer->context.tclr);
+}
+
+static int omap_dm_timer_reset(struct omap_dm_timer *timer)
+{
+ u32 l, timeout = 100000;
+
+ if (timer->revision != 1)
+ return -EINVAL;
+
+ omap_dm_timer_write_reg(timer, OMAP_TIMER_IF_CTRL_REG, 0x06);
+
+ do {
+ l = __omap_dm_timer_read(timer,
+ OMAP_TIMER_V1_SYS_STAT_OFFSET, 0);
+ } while (!l && timeout--);
+
+ if (!timeout) {
+ dev_err(&timer->pdev->dev, "Timer failed to reset\n");
+ return -ETIMEDOUT;
+ }
+
+ /* Configure timer for smart-idle mode */
+ l = __omap_dm_timer_read(timer, OMAP_TIMER_OCP_CFG_OFFSET, 0);
+ l |= 0x2 << 0x3;
+ __omap_dm_timer_write(timer, OMAP_TIMER_OCP_CFG_OFFSET, l, 0);
+
+ timer->posted = 0;
+
+ return 0;
+}
+
+static int omap_dm_timer_prepare(struct omap_dm_timer *timer)
+{
+ int rc;
+
+ /*
+ * FIXME: OMAP1 devices do not use the clock framework for dmtimers so
+ * do not call clk_get() for these devices.
+ */
+ if (!(timer->capability & OMAP_TIMER_NEEDS_RESET)) {
+ timer->fclk = clk_get(&timer->pdev->dev, "fck");
+ if (WARN_ON_ONCE(IS_ERR(timer->fclk))) {
+ dev_err(&timer->pdev->dev, ": No fclk handle.\n");
+ return -EINVAL;
+ }
+ }
+
+ omap_dm_timer_enable(timer);
+
+ if (timer->capability & OMAP_TIMER_NEEDS_RESET) {
+ rc = omap_dm_timer_reset(timer);
+ if (rc) {
+ omap_dm_timer_disable(timer);
+ return rc;
+ }
+ }
+
+ __omap_dm_timer_enable_posted(timer);
+ omap_dm_timer_disable(timer);
+
+ return omap_dm_timer_set_source(timer, OMAP_TIMER_SRC_32_KHZ);
+}
+
+static inline u32 omap_dm_timer_reserved_systimer(int id)
+{
+ return (omap_reserved_systimers & (1 << (id - 1))) ? 1 : 0;
+}
+
+int omap_dm_timer_reserve_systimer(int id)
+{
+ if (omap_dm_timer_reserved_systimer(id))
+ return -ENODEV;
+
+ omap_reserved_systimers |= (1 << (id - 1));
+
+ return 0;
+}
+
+static struct omap_dm_timer *_omap_dm_timer_request(int req_type, void *data)
+{
+ struct omap_dm_timer *timer = NULL, *t;
+ struct device_node *np = NULL;
+ unsigned long flags;
+ u32 cap = 0;
+ int id = 0;
+
+ switch (req_type) {
+ case REQUEST_BY_ID:
+ id = *(int *)data;
+ break;
+ case REQUEST_BY_CAP:
+ cap = *(u32 *)data;
+ break;
+ case REQUEST_BY_NODE:
+ np = (struct device_node *)data;
+ break;
+ default:
+ /* REQUEST_ANY */
+ break;
+ }
+
+ spin_lock_irqsave(&dm_timer_lock, flags);
+ list_for_each_entry(t, &omap_timer_list, node) {
+ if (t->reserved)
+ continue;
+
+ switch (req_type) {
+ case REQUEST_BY_ID:
+ if (id == t->pdev->id) {
+ timer = t;
+ timer->reserved = 1;
+ goto found;
+ }
+ break;
+ case REQUEST_BY_CAP:
+ if (cap == (t->capability & cap)) {
+ /*
+ * If timer is not NULL, we have already found
+ * one timer but it was not an exact match
+ * because it had more capabilites that what
+ * was required. Therefore, unreserve the last
+ * timer found and see if this one is a better
+ * match.
+ */
+ if (timer)
+ timer->reserved = 0;
+ timer = t;
+ timer->reserved = 1;
+
+ /* Exit loop early if we find an exact match */
+ if (t->capability == cap)
+ goto found;
+ }
+ break;
+ case REQUEST_BY_NODE:
+ if (np == t->pdev->dev.of_node) {
+ timer = t;
+ timer->reserved = 1;
+ goto found;
+ }
+ break;
+ default:
+ /* REQUEST_ANY */
+ timer = t;
+ timer->reserved = 1;
+ goto found;
+ }
+ }
+found:
+ spin_unlock_irqrestore(&dm_timer_lock, flags);
+
+ if (timer && omap_dm_timer_prepare(timer)) {
+ timer->reserved = 0;
+ timer = NULL;
+ }
+
+ if (!timer)
+ pr_debug("%s: timer request failed!\n", __func__);
+
+ return timer;
+}
+
+struct omap_dm_timer *omap_dm_timer_request(void)
+{
+ return _omap_dm_timer_request(REQUEST_ANY, NULL);
+}
+EXPORT_SYMBOL_GPL(omap_dm_timer_request);
+
+struct omap_dm_timer *omap_dm_timer_request_specific(int id)
+{
+ /* Requesting timer by ID is not supported when device tree is used */
+ if (of_have_populated_dt()) {
+ pr_warn("%s: Please use omap_dm_timer_request_by_cap/node()\n",
+ __func__);
+ return NULL;
+ }
+
+ return _omap_dm_timer_request(REQUEST_BY_ID, &id);
+}
+EXPORT_SYMBOL_GPL(omap_dm_timer_request_specific);
+
+/**
+ * omap_dm_timer_request_by_cap - Request a timer by capability
+ * @cap: Bit mask of capabilities to match
+ *
+ * Find a timer based upon capabilities bit mask. Callers of this function
+ * should use the definitions found in the plat/dmtimer.h file under the
+ * comment "timer capabilities used in hwmod database". Returns pointer to
+ * timer handle on success and a NULL pointer on failure.
+ */
+struct omap_dm_timer *omap_dm_timer_request_by_cap(u32 cap)
+{
+ return _omap_dm_timer_request(REQUEST_BY_CAP, &cap);
+}
+EXPORT_SYMBOL_GPL(omap_dm_timer_request_by_cap);
+
+/**
+ * omap_dm_timer_request_by_node - Request a timer by device-tree node
+ * @np: Pointer to device-tree timer node
+ *
+ * Request a timer based upon a device node pointer. Returns pointer to
+ * timer handle on success and a NULL pointer on failure.
+ */
+struct omap_dm_timer *omap_dm_timer_request_by_node(struct device_node *np)
+{
+ if (!np)
+ return NULL;
+
+ return _omap_dm_timer_request(REQUEST_BY_NODE, np);
+}
+EXPORT_SYMBOL_GPL(omap_dm_timer_request_by_node);
+
+int omap_dm_timer_free(struct omap_dm_timer *timer)
+{
+ if (unlikely(!timer))
+ return -EINVAL;
+
+ clk_put(timer->fclk);
+
+ WARN_ON(!timer->reserved);
+ timer->reserved = 0;
+ return 0;
+}
+EXPORT_SYMBOL_GPL(omap_dm_timer_free);
+
+void omap_dm_timer_enable(struct omap_dm_timer *timer)
+{
+ int c;
+
+ pm_runtime_get_sync(&timer->pdev->dev);
+
+ if (!(timer->capability & OMAP_TIMER_ALWON)) {
+ if (timer->get_context_loss_count) {
+ c = timer->get_context_loss_count(&timer->pdev->dev);
+ if (c != timer->ctx_loss_count) {
+ omap_timer_restore_context(timer);
+ timer->ctx_loss_count = c;
+ }
+ } else {
+ omap_timer_restore_context(timer);
+ }
+ }
+}
+EXPORT_SYMBOL_GPL(omap_dm_timer_enable);
+
+void omap_dm_timer_disable(struct omap_dm_timer *timer)
+{
+ pm_runtime_put_sync(&timer->pdev->dev);
+}
+EXPORT_SYMBOL_GPL(omap_dm_timer_disable);
+
+int omap_dm_timer_get_irq(struct omap_dm_timer *timer)
+{
+ if (timer)
+ return timer->irq;
+ return -EINVAL;
+}
+EXPORT_SYMBOL_GPL(omap_dm_timer_get_irq);
+
+#if defined(CONFIG_ARCH_OMAP1)
+#include <mach/hardware.h>
+/**
+ * omap_dm_timer_modify_idlect_mask - Check if any running timers use ARMXOR
+ * @inputmask: current value of idlect mask
+ */
+__u32 omap_dm_timer_modify_idlect_mask(__u32 inputmask)
+{
+ int i = 0;
+ struct omap_dm_timer *timer = NULL;
+ unsigned long flags;
+
+ /* If ARMXOR cannot be idled this function call is unnecessary */
+ if (!(inputmask & (1 << 1)))
+ return inputmask;
+
+ /* If any active timer is using ARMXOR return modified mask */
+ spin_lock_irqsave(&dm_timer_lock, flags);
+ list_for_each_entry(timer, &omap_timer_list, node) {
+ u32 l;
+
+ l = omap_dm_timer_read_reg(timer, OMAP_TIMER_CTRL_REG);
+ if (l & OMAP_TIMER_CTRL_ST) {
+ if (((omap_readl(MOD_CONF_CTRL_1) >> (i * 2)) & 0x03) == 0)
+ inputmask &= ~(1 << 1);
+ else
+ inputmask &= ~(1 << 2);
+ }
+ i++;
+ }
+ spin_unlock_irqrestore(&dm_timer_lock, flags);
+
+ return inputmask;
+}
+EXPORT_SYMBOL_GPL(omap_dm_timer_modify_idlect_mask);
+
+#else
+
+struct clk *omap_dm_timer_get_fclk(struct omap_dm_timer *timer)
+{
+ if (timer && !IS_ERR(timer->fclk))
+ return timer->fclk;
+ return NULL;
+}
+EXPORT_SYMBOL_GPL(omap_dm_timer_get_fclk);
+
+__u32 omap_dm_timer_modify_idlect_mask(__u32 inputmask)
+{
+ BUG();
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(omap_dm_timer_modify_idlect_mask);
+
+#endif
+
+int omap_dm_timer_trigger(struct omap_dm_timer *timer)
+{
+ if (unlikely(!timer || pm_runtime_suspended(&timer->pdev->dev))) {
+ pr_err("%s: timer not available or enabled.\n", __func__);
+ return -EINVAL;
+ }
+
+ omap_dm_timer_write_reg(timer, OMAP_TIMER_TRIGGER_REG, 0);
+ return 0;
+}
+EXPORT_SYMBOL_GPL(omap_dm_timer_trigger);
+
+int omap_dm_timer_start(struct omap_dm_timer *timer)
+{
+ u32 l;
+
+ if (unlikely(!timer))
+ return -EINVAL;
+
+ omap_dm_timer_enable(timer);
+
+ l = omap_dm_timer_read_reg(timer, OMAP_TIMER_CTRL_REG);
+ if (!(l & OMAP_TIMER_CTRL_ST)) {
+ l |= OMAP_TIMER_CTRL_ST;
+ omap_dm_timer_write_reg(timer, OMAP_TIMER_CTRL_REG, l);
+ }
+
+ /* Save the context */
+ timer->context.tclr = l;
+ return 0;
+}
+EXPORT_SYMBOL_GPL(omap_dm_timer_start);
+
+int omap_dm_timer_stop(struct omap_dm_timer *timer)
+{
+ unsigned long rate = 0;
+
+ if (unlikely(!timer))
+ return -EINVAL;
+
+ if (!(timer->capability & OMAP_TIMER_NEEDS_RESET))
+ rate = clk_get_rate(timer->fclk);
+
+ __omap_dm_timer_stop(timer, timer->posted, rate);
+
+ /*
+ * Since the register values are computed and written within
+ * __omap_dm_timer_stop, we need to use read to retrieve the
+ * context.
+ */
+ timer->context.tclr =
+ omap_dm_timer_read_reg(timer, OMAP_TIMER_CTRL_REG);
+ omap_dm_timer_disable(timer);
+ return 0;
+}
+EXPORT_SYMBOL_GPL(omap_dm_timer_stop);
+
+int omap_dm_timer_set_source(struct omap_dm_timer *timer, int source)
+{
+ int ret;
+ char *parent_name = NULL;
+ struct clk *parent;
+ struct dmtimer_platform_data *pdata;
+
+ if (unlikely(!timer))
+ return -EINVAL;
+
+ pdata = timer->pdev->dev.platform_data;
+
+ if (source < 0 || source >= 3)
+ return -EINVAL;
+
+ /*
+ * FIXME: Used for OMAP1 devices only because they do not currently
+ * use the clock framework to set the parent clock. To be removed
+ * once OMAP1 migrated to using clock framework for dmtimers
+ */
+ if (pdata && pdata->set_timer_src)
+ return pdata->set_timer_src(timer->pdev, source);
+
+ if (IS_ERR(timer->fclk))
+ return -EINVAL;
+
+ switch (source) {
+ case OMAP_TIMER_SRC_SYS_CLK:
+ parent_name = "timer_sys_ck";
+ break;
+
+ case OMAP_TIMER_SRC_32_KHZ:
+ parent_name = "timer_32k_ck";
+ break;
+
+ case OMAP_TIMER_SRC_EXT_CLK:
+ parent_name = "timer_ext_ck";
+ break;
+ }
+
+ parent = clk_get(&timer->pdev->dev, parent_name);
+ if (IS_ERR(parent)) {
+ pr_err("%s: %s not found\n", __func__, parent_name);
+ return -EINVAL;
+ }
+
+ ret = clk_set_parent(timer->fclk, parent);
+ if (ret < 0)
+ pr_err("%s: failed to set %s as parent\n", __func__,
+ parent_name);
+
+ clk_put(parent);
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(omap_dm_timer_set_source);
+
+int omap_dm_timer_set_load(struct omap_dm_timer *timer, int autoreload,
+ unsigned int load)
+{
+ u32 l;
+
+ if (unlikely(!timer))
+ return -EINVAL;
+
+ omap_dm_timer_enable(timer);
+ l = omap_dm_timer_read_reg(timer, OMAP_TIMER_CTRL_REG);
+ if (autoreload)
+ l |= OMAP_TIMER_CTRL_AR;
+ else
+ l &= ~OMAP_TIMER_CTRL_AR;
+ omap_dm_timer_write_reg(timer, OMAP_TIMER_CTRL_REG, l);
+ omap_dm_timer_write_reg(timer, OMAP_TIMER_LOAD_REG, load);
+
+ omap_dm_timer_write_reg(timer, OMAP_TIMER_TRIGGER_REG, 0);
+ /* Save the context */
+ timer->context.tclr = l;
+ timer->context.tldr = load;
+ omap_dm_timer_disable(timer);
+ return 0;
+}
+EXPORT_SYMBOL_GPL(omap_dm_timer_set_load);
+
+/* Optimized set_load which removes costly spin wait in timer_start */
+int omap_dm_timer_set_load_start(struct omap_dm_timer *timer, int autoreload,
+ unsigned int load)
+{
+ u32 l;
+
+ if (unlikely(!timer))
+ return -EINVAL;
+
+ omap_dm_timer_enable(timer);
+
+ l = omap_dm_timer_read_reg(timer, OMAP_TIMER_CTRL_REG);
+ if (autoreload) {
+ l |= OMAP_TIMER_CTRL_AR;
+ omap_dm_timer_write_reg(timer, OMAP_TIMER_LOAD_REG, load);
+ } else {
+ l &= ~OMAP_TIMER_CTRL_AR;
+ }
+ l |= OMAP_TIMER_CTRL_ST;
+
+ __omap_dm_timer_load_start(timer, l, load, timer->posted);
+
+ /* Save the context */
+ timer->context.tclr = l;
+ timer->context.tldr = load;
+ timer->context.tcrr = load;
+ return 0;
+}
+EXPORT_SYMBOL_GPL(omap_dm_timer_set_load_start);
+
+int omap_dm_timer_set_match(struct omap_dm_timer *timer, int enable,
+ unsigned int match)
+{
+ u32 l;
+
+ if (unlikely(!timer))
+ return -EINVAL;
+
+ omap_dm_timer_enable(timer);
+ l = omap_dm_timer_read_reg(timer, OMAP_TIMER_CTRL_REG);
+ if (enable)
+ l |= OMAP_TIMER_CTRL_CE;
+ else
+ l &= ~OMAP_TIMER_CTRL_CE;
+ omap_dm_timer_write_reg(timer, OMAP_TIMER_MATCH_REG, match);
+ omap_dm_timer_write_reg(timer, OMAP_TIMER_CTRL_REG, l);
+
+ /* Save the context */
+ timer->context.tclr = l;
+ timer->context.tmar = match;
+ omap_dm_timer_disable(timer);
+ return 0;
+}
+EXPORT_SYMBOL_GPL(omap_dm_timer_set_match);
+
+int omap_dm_timer_set_pwm(struct omap_dm_timer *timer, int def_on,
+ int toggle, int trigger)
+{
+ u32 l;
+
+ if (unlikely(!timer))
+ return -EINVAL;
+
+ omap_dm_timer_enable(timer);
+ l = omap_dm_timer_read_reg(timer, OMAP_TIMER_CTRL_REG);
+ l &= ~(OMAP_TIMER_CTRL_GPOCFG | OMAP_TIMER_CTRL_SCPWM |
+ OMAP_TIMER_CTRL_PT | (0x03 << 10));
+ if (def_on)
+ l |= OMAP_TIMER_CTRL_SCPWM;
+ if (toggle)
+ l |= OMAP_TIMER_CTRL_PT;
+ l |= trigger << 10;
+ omap_dm_timer_write_reg(timer, OMAP_TIMER_CTRL_REG, l);
+
+ /* Save the context */
+ timer->context.tclr = l;
+ omap_dm_timer_disable(timer);
+ return 0;
+}
+EXPORT_SYMBOL_GPL(omap_dm_timer_set_pwm);
+
+int omap_dm_timer_set_prescaler(struct omap_dm_timer *timer, int prescaler)
+{
+ u32 l;
+
+ if (unlikely(!timer))
+ return -EINVAL;
+
+ omap_dm_timer_enable(timer);
+ l = omap_dm_timer_read_reg(timer, OMAP_TIMER_CTRL_REG);
+ l &= ~(OMAP_TIMER_CTRL_PRE | (0x07 << 2));
+ if (prescaler >= 0x00 && prescaler <= 0x07) {
+ l |= OMAP_TIMER_CTRL_PRE;
+ l |= prescaler << 2;
+ }
+ omap_dm_timer_write_reg(timer, OMAP_TIMER_CTRL_REG, l);
+
+ /* Save the context */
+ timer->context.tclr = l;
+ omap_dm_timer_disable(timer);
+ return 0;
+}
+EXPORT_SYMBOL_GPL(omap_dm_timer_set_prescaler);
+
+int omap_dm_timer_set_int_enable(struct omap_dm_timer *timer,
+ unsigned int value)
+{
+ if (unlikely(!timer))
+ return -EINVAL;
+
+ omap_dm_timer_enable(timer);
+ __omap_dm_timer_int_enable(timer, value);
+
+ /* Save the context */
+ timer->context.tier = value;
+ timer->context.twer = value;
+ omap_dm_timer_disable(timer);
+ return 0;
+}
+EXPORT_SYMBOL_GPL(omap_dm_timer_set_int_enable);
+
+/**
+ * omap_dm_timer_set_int_disable - disable timer interrupts
+ * @timer: pointer to timer handle
+ * @mask: bit mask of interrupts to be disabled
+ *
+ * Disables the specified timer interrupts for a timer.
+ */
+int omap_dm_timer_set_int_disable(struct omap_dm_timer *timer, u32 mask)
+{
+ u32 l = mask;
+
+ if (unlikely(!timer))
+ return -EINVAL;
+
+ omap_dm_timer_enable(timer);
+
+ if (timer->revision == 1)
+ l = readl_relaxed(timer->irq_ena) & ~mask;
+
+ writel_relaxed(l, timer->irq_dis);
+ l = omap_dm_timer_read_reg(timer, OMAP_TIMER_WAKEUP_EN_REG) & ~mask;
+ omap_dm_timer_write_reg(timer, OMAP_TIMER_WAKEUP_EN_REG, l);
+
+ /* Save the context */
+ timer->context.tier &= ~mask;
+ timer->context.twer &= ~mask;
+ omap_dm_timer_disable(timer);
+ return 0;
+}
+EXPORT_SYMBOL_GPL(omap_dm_timer_set_int_disable);
+
+unsigned int omap_dm_timer_read_status(struct omap_dm_timer *timer)
+{
+ unsigned int l;
+
+ if (unlikely(!timer || pm_runtime_suspended(&timer->pdev->dev))) {
+ pr_err("%s: timer not available or enabled.\n", __func__);
+ return 0;
+ }
+
+ l = readl_relaxed(timer->irq_stat);
+
+ return l;
+}
+EXPORT_SYMBOL_GPL(omap_dm_timer_read_status);
+
+int omap_dm_timer_write_status(struct omap_dm_timer *timer, unsigned int value)
+{
+ if (unlikely(!timer || pm_runtime_suspended(&timer->pdev->dev)))
+ return -EINVAL;
+
+ __omap_dm_timer_write_status(timer, value);
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(omap_dm_timer_write_status);
+
+unsigned int omap_dm_timer_read_counter(struct omap_dm_timer *timer)
+{
+ if (unlikely(!timer || pm_runtime_suspended(&timer->pdev->dev))) {
+ pr_err("%s: timer not iavailable or enabled.\n", __func__);
+ return 0;
+ }
+
+ return __omap_dm_timer_read_counter(timer, timer->posted);
+}
+EXPORT_SYMBOL_GPL(omap_dm_timer_read_counter);
+
+int omap_dm_timer_write_counter(struct omap_dm_timer *timer, unsigned int value)
+{
+ if (unlikely(!timer || pm_runtime_suspended(&timer->pdev->dev))) {
+ pr_err("%s: timer not available or enabled.\n", __func__);
+ return -EINVAL;
+ }
+
+ omap_dm_timer_write_reg(timer, OMAP_TIMER_COUNTER_REG, value);
+
+ /* Save the context */
+ timer->context.tcrr = value;
+ return 0;
+}
+EXPORT_SYMBOL_GPL(omap_dm_timer_write_counter);
+
+int omap_dm_timers_active(void)
+{
+ struct omap_dm_timer *timer;
+
+ list_for_each_entry(timer, &omap_timer_list, node) {
+ if (!timer->reserved)
+ continue;
+
+ if (omap_dm_timer_read_reg(timer, OMAP_TIMER_CTRL_REG) &
+ OMAP_TIMER_CTRL_ST) {
+ return 1;
+ }
+ }
+ return 0;
+}
+EXPORT_SYMBOL_GPL(omap_dm_timers_active);
+
+static const struct of_device_id omap_timer_match[];
+
+/**
+ * omap_dm_timer_probe - probe function called for every registered device
+ * @pdev: pointer to current timer platform device
+ *
+ * Called by driver framework at the end of device registration for all
+ * timer devices.
+ */
+static int omap_dm_timer_probe(struct platform_device *pdev)
+{
+ unsigned long flags;
+ struct omap_dm_timer *timer;
+ struct resource *mem, *irq;
+ struct device *dev = &pdev->dev;
+ const struct of_device_id *match;
+ const struct dmtimer_platform_data *pdata;
+ int ret;
+
+ match = of_match_device(of_match_ptr(omap_timer_match), dev);
+ pdata = match ? match->data : dev->platform_data;
+
+ if (!pdata && !dev->of_node) {
+ dev_err(dev, "%s: no platform data.\n", __func__);
+ return -ENODEV;
+ }
+
+ irq = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
+ if (unlikely(!irq)) {
+ dev_err(dev, "%s: no IRQ resource.\n", __func__);
+ return -ENODEV;
+ }
+
+ mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ if (unlikely(!mem)) {
+ dev_err(dev, "%s: no memory resource.\n", __func__);
+ return -ENODEV;
+ }
+
+ timer = devm_kzalloc(dev, sizeof(struct omap_dm_timer), GFP_KERNEL);
+ if (!timer) {
+ dev_err(dev, "%s: memory alloc failed!\n", __func__);
+ return -ENOMEM;
+ }
+
+ timer->fclk = ERR_PTR(-ENODEV);
+ timer->io_base = devm_ioremap_resource(dev, mem);
+ if (IS_ERR(timer->io_base))
+ return PTR_ERR(timer->io_base);
+
+ if (dev->of_node) {
+ if (of_find_property(dev->of_node, "ti,timer-alwon", NULL))
+ timer->capability |= OMAP_TIMER_ALWON;
+ if (of_find_property(dev->of_node, "ti,timer-dsp", NULL))
+ timer->capability |= OMAP_TIMER_HAS_DSP_IRQ;
+ if (of_find_property(dev->of_node, "ti,timer-pwm", NULL))
+ timer->capability |= OMAP_TIMER_HAS_PWM;
+ if (of_find_property(dev->of_node, "ti,timer-secure", NULL))
+ timer->capability |= OMAP_TIMER_SECURE;
+ } else {
+ timer->id = pdev->id;
+ timer->capability = pdata->timer_capability;
+ timer->reserved = omap_dm_timer_reserved_systimer(timer->id);
+ timer->get_context_loss_count = pdata->get_context_loss_count;
+ }
+
+ if (pdata)
+ timer->errata = pdata->timer_errata;
+
+ timer->irq = irq->start;
+ timer->pdev = pdev;
+
+ /* Skip pm_runtime_enable for OMAP1 */
+ if (!(timer->capability & OMAP_TIMER_NEEDS_RESET)) {
+ pm_runtime_enable(dev);
+ pm_runtime_irq_safe(dev);
+ }
+
+ if (!timer->reserved) {
+ ret = pm_runtime_get_sync(dev);
+ if (ret < 0) {
+ dev_err(dev, "%s: pm_runtime_get_sync failed!\n",
+ __func__);
+ goto err_get_sync;
+ }
+ __omap_dm_timer_init_regs(timer);
+ pm_runtime_put(dev);
+ }
+
+ /* add the timer element to the list */
+ spin_lock_irqsave(&dm_timer_lock, flags);
+ list_add_tail(&timer->node, &omap_timer_list);
+ spin_unlock_irqrestore(&dm_timer_lock, flags);
+
+ dev_dbg(dev, "Device Probed.\n");
+
+ return 0;
+
+err_get_sync:
+ pm_runtime_put_noidle(dev);
+ pm_runtime_disable(dev);
+ return ret;
+}
+
+/**
+ * omap_dm_timer_remove - cleanup a registered timer device
+ * @pdev: pointer to current timer platform device
+ *
+ * Called by driver framework whenever a timer device is unregistered.
+ * In addition to freeing platform resources it also deletes the timer
+ * entry from the local list.
+ */
+static int omap_dm_timer_remove(struct platform_device *pdev)
+{
+ struct omap_dm_timer *timer;
+ unsigned long flags;
+ int ret = -EINVAL;
+
+ spin_lock_irqsave(&dm_timer_lock, flags);
+ list_for_each_entry(timer, &omap_timer_list, node)
+ if (!strcmp(dev_name(&timer->pdev->dev),
+ dev_name(&pdev->dev))) {
+ list_del(&timer->node);
+ ret = 0;
+ break;
+ }
+ spin_unlock_irqrestore(&dm_timer_lock, flags);
+
+ pm_runtime_disable(&pdev->dev);
+
+ return ret;
+}
+
+static const struct dmtimer_platform_data omap3plus_pdata = {
+ .timer_errata = OMAP_TIMER_ERRATA_I103_I767,
+};
+
+static const struct of_device_id omap_timer_match[] = {
+ {
+ .compatible = "ti,omap2420-timer",
+ },
+ {
+ .compatible = "ti,omap3430-timer",
+ .data = &omap3plus_pdata,
+ },
+ {
+ .compatible = "ti,omap4430-timer",
+ .data = &omap3plus_pdata,
+ },
+ {
+ .compatible = "ti,omap5430-timer",
+ .data = &omap3plus_pdata,
+ },
+ {
+ .compatible = "ti,am335x-timer",
+ .data = &omap3plus_pdata,
+ },
+ {
+ .compatible = "ti,am335x-timer-1ms",
+ .data = &omap3plus_pdata,
+ },
+ {},
+};
+MODULE_DEVICE_TABLE(of, omap_timer_match);
+
+static struct platform_driver omap_dm_timer_driver = {
+ .probe = omap_dm_timer_probe,
+ .remove = omap_dm_timer_remove,
+ .driver = {
+ .name = "omap_timer",
+ .of_match_table = of_match_ptr(omap_timer_match),
+ },
+};
+
+early_platform_init("earlytimer", &omap_dm_timer_driver);
+module_platform_driver(omap_dm_timer_driver);
+
+MODULE_DESCRIPTION("OMAP Dual-Mode Timer Driver");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:" DRIVER_NAME);
+MODULE_AUTHOR("Texas Instruments Inc");
diff --git a/kernel/arch/arm/plat-omap/i2c.c b/kernel/arch/arm/plat-omap/i2c.c
new file mode 100644
index 000000000..58213d971
--- /dev/null
+++ b/kernel/arch/arm/plat-omap/i2c.c
@@ -0,0 +1,116 @@
+/*
+ * linux/arch/arm/plat-omap/i2c.c
+ *
+ * Helper module for board specific I2C bus registration
+ *
+ * Copyright (C) 2007 Nokia Corporation.
+ *
+ * Contact: Jarkko Nikula <jhnikula@gmail.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.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
+ * 02110-1301 USA
+ *
+ */
+
+#include <linux/kernel.h>
+#include <linux/platform_device.h>
+#include <linux/i2c.h>
+#include <linux/i2c-omap.h>
+#include <linux/slab.h>
+#include <linux/err.h>
+#include <linux/clk.h>
+
+#include <plat/i2c.h>
+
+#define OMAP_I2C_MAX_CONTROLLERS 4
+static struct omap_i2c_bus_platform_data i2c_pdata[OMAP_I2C_MAX_CONTROLLERS];
+
+#define OMAP_I2C_CMDLINE_SETUP (BIT(31))
+
+/**
+ * omap_i2c_bus_setup - Process command line options for the I2C bus speed
+ * @str: String of options
+ *
+ * This function allow to override the default I2C bus speed for given I2C
+ * bus with a command line option.
+ *
+ * Format: i2c_bus=bus_id,clkrate (in kHz)
+ *
+ * Returns 1 on success, 0 otherwise.
+ */
+static int __init omap_i2c_bus_setup(char *str)
+{
+ int ints[3];
+
+ get_options(str, 3, ints);
+ if (ints[0] < 2 || ints[1] < 1 ||
+ ints[1] > OMAP_I2C_MAX_CONTROLLERS)
+ return 0;
+ i2c_pdata[ints[1] - 1].clkrate = ints[2];
+ i2c_pdata[ints[1] - 1].clkrate |= OMAP_I2C_CMDLINE_SETUP;
+
+ return 1;
+}
+__setup("i2c_bus=", omap_i2c_bus_setup);
+
+/*
+ * Register busses defined in command line but that are not registered with
+ * omap_register_i2c_bus from board initialization code.
+ */
+int __init omap_register_i2c_bus_cmdline(void)
+{
+ int i, err = 0;
+
+ for (i = 0; i < ARRAY_SIZE(i2c_pdata); i++)
+ if (i2c_pdata[i].clkrate & OMAP_I2C_CMDLINE_SETUP) {
+ i2c_pdata[i].clkrate &= ~OMAP_I2C_CMDLINE_SETUP;
+ err = omap_i2c_add_bus(&i2c_pdata[i], i + 1);
+ if (err)
+ goto out;
+ }
+
+out:
+ return err;
+}
+
+/**
+ * omap_register_i2c_bus - register I2C bus with device descriptors
+ * @bus_id: bus id counting from number 1
+ * @clkrate: clock rate of the bus in kHz
+ * @info: pointer into I2C device descriptor table or NULL
+ * @len: number of descriptors in the table
+ *
+ * Returns 0 on success or an error code.
+ */
+int __init omap_register_i2c_bus(int bus_id, u32 clkrate,
+ struct i2c_board_info const *info,
+ unsigned len)
+{
+ int err;
+
+ BUG_ON(bus_id < 1 || bus_id > OMAP_I2C_MAX_CONTROLLERS);
+
+ if (info) {
+ err = i2c_register_board_info(bus_id, info, len);
+ if (err)
+ return err;
+ }
+
+ if (!i2c_pdata[bus_id - 1].clkrate)
+ i2c_pdata[bus_id - 1].clkrate = clkrate;
+
+ i2c_pdata[bus_id - 1].clkrate &= ~OMAP_I2C_CMDLINE_SETUP;
+
+ return omap_i2c_add_bus(&i2c_pdata[bus_id - 1], bus_id);
+}
diff --git a/kernel/arch/arm/plat-omap/include/plat/counter-32k.h b/kernel/arch/arm/plat-omap/include/plat/counter-32k.h
new file mode 100644
index 000000000..da000d482
--- /dev/null
+++ b/kernel/arch/arm/plat-omap/include/plat/counter-32k.h
@@ -0,0 +1 @@
+int omap_init_clocksource_32k(void __iomem *vbase);
diff --git a/kernel/arch/arm/plat-omap/include/plat/cpu.h b/kernel/arch/arm/plat-omap/include/plat/cpu.h
new file mode 100644
index 000000000..c9a66bf36
--- /dev/null
+++ b/kernel/arch/arm/plat-omap/include/plat/cpu.h
@@ -0,0 +1,35 @@
+/*
+ * OMAP cpu type detection
+ *
+ * Copyright (C) 2004, 2008 Nokia Corporation
+ *
+ * Copyright (C) 2009-11 Texas Instruments.
+ *
+ * Written by Tony Lindgren <tony.lindgren@nokia.com>
+ *
+ * Added OMAP4/5 specific defines - Santosh Shilimkar<santosh.shilimkar@ti.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+ */
+
+#ifndef __ASM_ARCH_OMAP_CPU_H
+#define __ASM_ARCH_OMAP_CPU_H
+
+#ifdef CONFIG_ARCH_OMAP1
+#include <mach/soc.h>
+#endif
+
+#endif
diff --git a/kernel/arch/arm/plat-omap/include/plat/dmtimer.h b/kernel/arch/arm/plat-omap/include/plat/dmtimer.h
new file mode 100644
index 000000000..dd79f3005
--- /dev/null
+++ b/kernel/arch/arm/plat-omap/include/plat/dmtimer.h
@@ -0,0 +1,418 @@
+/*
+ * arch/arm/plat-omap/include/plat/dmtimer.h
+ *
+ * OMAP Dual-Mode Timers
+ *
+ * Copyright (C) 2010 Texas Instruments Incorporated - http://www.ti.com/
+ * Tarun Kanti DebBarma <tarun.kanti@ti.com>
+ * Thara Gopinath <thara@ti.com>
+ *
+ * Platform device conversion and hwmod support.
+ *
+ * Copyright (C) 2005 Nokia Corporation
+ * Author: Lauri Leukkunen <lauri.leukkunen@nokia.com>
+ * PWM and clock framwork support by Timo Teras.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.
+ *
+ * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
+ * NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#include <linux/delay.h>
+#include <linux/io.h>
+#include <linux/platform_device.h>
+
+#ifndef __ASM_ARCH_DMTIMER_H
+#define __ASM_ARCH_DMTIMER_H
+
+/* clock sources */
+#define OMAP_TIMER_SRC_SYS_CLK 0x00
+#define OMAP_TIMER_SRC_32_KHZ 0x01
+#define OMAP_TIMER_SRC_EXT_CLK 0x02
+
+/* timer interrupt enable bits */
+#define OMAP_TIMER_INT_CAPTURE (1 << 2)
+#define OMAP_TIMER_INT_OVERFLOW (1 << 1)
+#define OMAP_TIMER_INT_MATCH (1 << 0)
+
+/* trigger types */
+#define OMAP_TIMER_TRIGGER_NONE 0x00
+#define OMAP_TIMER_TRIGGER_OVERFLOW 0x01
+#define OMAP_TIMER_TRIGGER_OVERFLOW_AND_COMPARE 0x02
+
+/* posted mode types */
+#define OMAP_TIMER_NONPOSTED 0x00
+#define OMAP_TIMER_POSTED 0x01
+
+/* timer capabilities used in hwmod database */
+#define OMAP_TIMER_SECURE 0x80000000
+#define OMAP_TIMER_ALWON 0x40000000
+#define OMAP_TIMER_HAS_PWM 0x20000000
+#define OMAP_TIMER_NEEDS_RESET 0x10000000
+#define OMAP_TIMER_HAS_DSP_IRQ 0x08000000
+
+/*
+ * timer errata flags
+ *
+ * Errata i103/i767 impacts all OMAP3/4/5 devices including AM33xx. This
+ * errata prevents us from using posted mode on these devices, unless the
+ * timer counter register is never read. For more details please refer to
+ * the OMAP3/4/5 errata documents.
+ */
+#define OMAP_TIMER_ERRATA_I103_I767 0x80000000
+
+struct omap_timer_capability_dev_attr {
+ u32 timer_capability;
+};
+
+struct timer_regs {
+ u32 tidr;
+ u32 tier;
+ u32 twer;
+ u32 tclr;
+ u32 tcrr;
+ u32 tldr;
+ u32 ttrg;
+ u32 twps;
+ u32 tmar;
+ u32 tcar1;
+ u32 tsicr;
+ u32 tcar2;
+ u32 tpir;
+ u32 tnir;
+ u32 tcvr;
+ u32 tocr;
+ u32 towr;
+};
+
+struct omap_dm_timer {
+ int id;
+ int irq;
+ struct clk *fclk;
+
+ void __iomem *io_base;
+ void __iomem *irq_stat; /* TISR/IRQSTATUS interrupt status */
+ void __iomem *irq_ena; /* irq enable */
+ void __iomem *irq_dis; /* irq disable, only on v2 ip */
+ void __iomem *pend; /* write pending */
+ void __iomem *func_base; /* function register base */
+
+ unsigned long rate;
+ unsigned reserved:1;
+ unsigned posted:1;
+ struct timer_regs context;
+ int (*get_context_loss_count)(struct device *);
+ int ctx_loss_count;
+ int revision;
+ u32 capability;
+ u32 errata;
+ struct platform_device *pdev;
+ struct list_head node;
+};
+
+int omap_dm_timer_reserve_systimer(int id);
+struct omap_dm_timer *omap_dm_timer_request(void);
+struct omap_dm_timer *omap_dm_timer_request_specific(int timer_id);
+struct omap_dm_timer *omap_dm_timer_request_by_cap(u32 cap);
+struct omap_dm_timer *omap_dm_timer_request_by_node(struct device_node *np);
+int omap_dm_timer_free(struct omap_dm_timer *timer);
+void omap_dm_timer_enable(struct omap_dm_timer *timer);
+void omap_dm_timer_disable(struct omap_dm_timer *timer);
+
+int omap_dm_timer_get_irq(struct omap_dm_timer *timer);
+
+u32 omap_dm_timer_modify_idlect_mask(u32 inputmask);
+struct clk *omap_dm_timer_get_fclk(struct omap_dm_timer *timer);
+
+int omap_dm_timer_trigger(struct omap_dm_timer *timer);
+int omap_dm_timer_start(struct omap_dm_timer *timer);
+int omap_dm_timer_stop(struct omap_dm_timer *timer);
+
+int omap_dm_timer_set_source(struct omap_dm_timer *timer, int source);
+int omap_dm_timer_set_load(struct omap_dm_timer *timer, int autoreload, unsigned int value);
+int omap_dm_timer_set_load_start(struct omap_dm_timer *timer, int autoreload, unsigned int value);
+int omap_dm_timer_set_match(struct omap_dm_timer *timer, int enable, unsigned int match);
+int omap_dm_timer_set_pwm(struct omap_dm_timer *timer, int def_on, int toggle, int trigger);
+int omap_dm_timer_set_prescaler(struct omap_dm_timer *timer, int prescaler);
+
+int omap_dm_timer_set_int_enable(struct omap_dm_timer *timer, unsigned int value);
+int omap_dm_timer_set_int_disable(struct omap_dm_timer *timer, u32 mask);
+
+unsigned int omap_dm_timer_read_status(struct omap_dm_timer *timer);
+int omap_dm_timer_write_status(struct omap_dm_timer *timer, unsigned int value);
+unsigned int omap_dm_timer_read_counter(struct omap_dm_timer *timer);
+int omap_dm_timer_write_counter(struct omap_dm_timer *timer, unsigned int value);
+
+int omap_dm_timers_active(void);
+
+/*
+ * Do not use the defines below, they are not needed. They should be only
+ * used by dmtimer.c and sys_timer related code.
+ */
+
+/*
+ * The interrupt registers are different between v1 and v2 ip.
+ * These registers are offsets from timer->iobase.
+ */
+#define OMAP_TIMER_ID_OFFSET 0x00
+#define OMAP_TIMER_OCP_CFG_OFFSET 0x10
+
+#define OMAP_TIMER_V1_SYS_STAT_OFFSET 0x14
+#define OMAP_TIMER_V1_STAT_OFFSET 0x18
+#define OMAP_TIMER_V1_INT_EN_OFFSET 0x1c
+
+#define OMAP_TIMER_V2_IRQSTATUS_RAW 0x24
+#define OMAP_TIMER_V2_IRQSTATUS 0x28
+#define OMAP_TIMER_V2_IRQENABLE_SET 0x2c
+#define OMAP_TIMER_V2_IRQENABLE_CLR 0x30
+
+/*
+ * The functional registers have a different base on v1 and v2 ip.
+ * These registers are offsets from timer->func_base. The func_base
+ * is samae as io_base for v1 and io_base + 0x14 for v2 ip.
+ *
+ */
+#define OMAP_TIMER_V2_FUNC_OFFSET 0x14
+
+#define _OMAP_TIMER_WAKEUP_EN_OFFSET 0x20
+#define _OMAP_TIMER_CTRL_OFFSET 0x24
+#define OMAP_TIMER_CTRL_GPOCFG (1 << 14)
+#define OMAP_TIMER_CTRL_CAPTMODE (1 << 13)
+#define OMAP_TIMER_CTRL_PT (1 << 12)
+#define OMAP_TIMER_CTRL_TCM_LOWTOHIGH (0x1 << 8)
+#define OMAP_TIMER_CTRL_TCM_HIGHTOLOW (0x2 << 8)
+#define OMAP_TIMER_CTRL_TCM_BOTHEDGES (0x3 << 8)
+#define OMAP_TIMER_CTRL_SCPWM (1 << 7)
+#define OMAP_TIMER_CTRL_CE (1 << 6) /* compare enable */
+#define OMAP_TIMER_CTRL_PRE (1 << 5) /* prescaler enable */
+#define OMAP_TIMER_CTRL_PTV_SHIFT 2 /* prescaler value shift */
+#define OMAP_TIMER_CTRL_POSTED (1 << 2)
+#define OMAP_TIMER_CTRL_AR (1 << 1) /* auto-reload enable */
+#define OMAP_TIMER_CTRL_ST (1 << 0) /* start timer */
+#define _OMAP_TIMER_COUNTER_OFFSET 0x28
+#define _OMAP_TIMER_LOAD_OFFSET 0x2c
+#define _OMAP_TIMER_TRIGGER_OFFSET 0x30
+#define _OMAP_TIMER_WRITE_PEND_OFFSET 0x34
+#define WP_NONE 0 /* no write pending bit */
+#define WP_TCLR (1 << 0)
+#define WP_TCRR (1 << 1)
+#define WP_TLDR (1 << 2)
+#define WP_TTGR (1 << 3)
+#define WP_TMAR (1 << 4)
+#define WP_TPIR (1 << 5)
+#define WP_TNIR (1 << 6)
+#define WP_TCVR (1 << 7)
+#define WP_TOCR (1 << 8)
+#define WP_TOWR (1 << 9)
+#define _OMAP_TIMER_MATCH_OFFSET 0x38
+#define _OMAP_TIMER_CAPTURE_OFFSET 0x3c
+#define _OMAP_TIMER_IF_CTRL_OFFSET 0x40
+#define _OMAP_TIMER_CAPTURE2_OFFSET 0x44 /* TCAR2, 34xx only */
+#define _OMAP_TIMER_TICK_POS_OFFSET 0x48 /* TPIR, 34xx only */
+#define _OMAP_TIMER_TICK_NEG_OFFSET 0x4c /* TNIR, 34xx only */
+#define _OMAP_TIMER_TICK_COUNT_OFFSET 0x50 /* TCVR, 34xx only */
+#define _OMAP_TIMER_TICK_INT_MASK_SET_OFFSET 0x54 /* TOCR, 34xx only */
+#define _OMAP_TIMER_TICK_INT_MASK_COUNT_OFFSET 0x58 /* TOWR, 34xx only */
+
+/* register offsets with the write pending bit encoded */
+#define WPSHIFT 16
+
+#define OMAP_TIMER_WAKEUP_EN_REG (_OMAP_TIMER_WAKEUP_EN_OFFSET \
+ | (WP_NONE << WPSHIFT))
+
+#define OMAP_TIMER_CTRL_REG (_OMAP_TIMER_CTRL_OFFSET \
+ | (WP_TCLR << WPSHIFT))
+
+#define OMAP_TIMER_COUNTER_REG (_OMAP_TIMER_COUNTER_OFFSET \
+ | (WP_TCRR << WPSHIFT))
+
+#define OMAP_TIMER_LOAD_REG (_OMAP_TIMER_LOAD_OFFSET \
+ | (WP_TLDR << WPSHIFT))
+
+#define OMAP_TIMER_TRIGGER_REG (_OMAP_TIMER_TRIGGER_OFFSET \
+ | (WP_TTGR << WPSHIFT))
+
+#define OMAP_TIMER_WRITE_PEND_REG (_OMAP_TIMER_WRITE_PEND_OFFSET \
+ | (WP_NONE << WPSHIFT))
+
+#define OMAP_TIMER_MATCH_REG (_OMAP_TIMER_MATCH_OFFSET \
+ | (WP_TMAR << WPSHIFT))
+
+#define OMAP_TIMER_CAPTURE_REG (_OMAP_TIMER_CAPTURE_OFFSET \
+ | (WP_NONE << WPSHIFT))
+
+#define OMAP_TIMER_IF_CTRL_REG (_OMAP_TIMER_IF_CTRL_OFFSET \
+ | (WP_NONE << WPSHIFT))
+
+#define OMAP_TIMER_CAPTURE2_REG (_OMAP_TIMER_CAPTURE2_OFFSET \
+ | (WP_NONE << WPSHIFT))
+
+#define OMAP_TIMER_TICK_POS_REG (_OMAP_TIMER_TICK_POS_OFFSET \
+ | (WP_TPIR << WPSHIFT))
+
+#define OMAP_TIMER_TICK_NEG_REG (_OMAP_TIMER_TICK_NEG_OFFSET \
+ | (WP_TNIR << WPSHIFT))
+
+#define OMAP_TIMER_TICK_COUNT_REG (_OMAP_TIMER_TICK_COUNT_OFFSET \
+ | (WP_TCVR << WPSHIFT))
+
+#define OMAP_TIMER_TICK_INT_MASK_SET_REG \
+ (_OMAP_TIMER_TICK_INT_MASK_SET_OFFSET | (WP_TOCR << WPSHIFT))
+
+#define OMAP_TIMER_TICK_INT_MASK_COUNT_REG \
+ (_OMAP_TIMER_TICK_INT_MASK_COUNT_OFFSET | (WP_TOWR << WPSHIFT))
+
+static inline u32 __omap_dm_timer_read(struct omap_dm_timer *timer, u32 reg,
+ int posted)
+{
+ if (posted)
+ while (readl_relaxed(timer->pend) & (reg >> WPSHIFT))
+ cpu_relax();
+
+ return readl_relaxed(timer->func_base + (reg & 0xff));
+}
+
+static inline void __omap_dm_timer_write(struct omap_dm_timer *timer,
+ u32 reg, u32 val, int posted)
+{
+ if (posted)
+ while (readl_relaxed(timer->pend) & (reg >> WPSHIFT))
+ cpu_relax();
+
+ writel_relaxed(val, timer->func_base + (reg & 0xff));
+}
+
+static inline void __omap_dm_timer_init_regs(struct omap_dm_timer *timer)
+{
+ u32 tidr;
+
+ /* Assume v1 ip if bits [31:16] are zero */
+ tidr = readl_relaxed(timer->io_base);
+ if (!(tidr >> 16)) {
+ timer->revision = 1;
+ timer->irq_stat = timer->io_base + OMAP_TIMER_V1_STAT_OFFSET;
+ timer->irq_ena = timer->io_base + OMAP_TIMER_V1_INT_EN_OFFSET;
+ timer->irq_dis = timer->io_base + OMAP_TIMER_V1_INT_EN_OFFSET;
+ timer->pend = timer->io_base + _OMAP_TIMER_WRITE_PEND_OFFSET;
+ timer->func_base = timer->io_base;
+ } else {
+ timer->revision = 2;
+ timer->irq_stat = timer->io_base + OMAP_TIMER_V2_IRQSTATUS;
+ timer->irq_ena = timer->io_base + OMAP_TIMER_V2_IRQENABLE_SET;
+ timer->irq_dis = timer->io_base + OMAP_TIMER_V2_IRQENABLE_CLR;
+ timer->pend = timer->io_base +
+ _OMAP_TIMER_WRITE_PEND_OFFSET +
+ OMAP_TIMER_V2_FUNC_OFFSET;
+ timer->func_base = timer->io_base + OMAP_TIMER_V2_FUNC_OFFSET;
+ }
+}
+
+/*
+ * __omap_dm_timer_enable_posted - enables write posted mode
+ * @timer: pointer to timer instance handle
+ *
+ * Enables the write posted mode for the timer. When posted mode is enabled
+ * writes to certain timer registers are immediately acknowledged by the
+ * internal bus and hence prevents stalling the CPU waiting for the write to
+ * complete. Enabling this feature can improve performance for writing to the
+ * timer registers.
+ */
+static inline void __omap_dm_timer_enable_posted(struct omap_dm_timer *timer)
+{
+ if (timer->posted)
+ return;
+
+ if (timer->errata & OMAP_TIMER_ERRATA_I103_I767) {
+ timer->posted = OMAP_TIMER_NONPOSTED;
+ __omap_dm_timer_write(timer, OMAP_TIMER_IF_CTRL_REG, 0, 0);
+ return;
+ }
+
+ __omap_dm_timer_write(timer, OMAP_TIMER_IF_CTRL_REG,
+ OMAP_TIMER_CTRL_POSTED, 0);
+ timer->context.tsicr = OMAP_TIMER_CTRL_POSTED;
+ timer->posted = OMAP_TIMER_POSTED;
+}
+
+/**
+ * __omap_dm_timer_override_errata - override errata flags for a timer
+ * @timer: pointer to timer handle
+ * @errata: errata flags to be ignored
+ *
+ * For a given timer, override a timer errata by clearing the flags
+ * specified by the errata argument. A specific erratum should only be
+ * overridden for a timer if the timer is used in such a way the erratum
+ * has no impact.
+ */
+static inline void __omap_dm_timer_override_errata(struct omap_dm_timer *timer,
+ u32 errata)
+{
+ timer->errata &= ~errata;
+}
+
+static inline void __omap_dm_timer_stop(struct omap_dm_timer *timer,
+ int posted, unsigned long rate)
+{
+ u32 l;
+
+ l = __omap_dm_timer_read(timer, OMAP_TIMER_CTRL_REG, posted);
+ if (l & OMAP_TIMER_CTRL_ST) {
+ l &= ~0x1;
+ __omap_dm_timer_write(timer, OMAP_TIMER_CTRL_REG, l, posted);
+#ifdef CONFIG_ARCH_OMAP2PLUS
+ /* Readback to make sure write has completed */
+ __omap_dm_timer_read(timer, OMAP_TIMER_CTRL_REG, posted);
+ /*
+ * Wait for functional clock period x 3.5 to make sure that
+ * timer is stopped
+ */
+ udelay(3500000 / rate + 1);
+#endif
+ }
+
+ /* Ack possibly pending interrupt */
+ writel_relaxed(OMAP_TIMER_INT_OVERFLOW, timer->irq_stat);
+}
+
+static inline void __omap_dm_timer_load_start(struct omap_dm_timer *timer,
+ u32 ctrl, unsigned int load,
+ int posted)
+{
+ __omap_dm_timer_write(timer, OMAP_TIMER_COUNTER_REG, load, posted);
+ __omap_dm_timer_write(timer, OMAP_TIMER_CTRL_REG, ctrl, posted);
+}
+
+static inline void __omap_dm_timer_int_enable(struct omap_dm_timer *timer,
+ unsigned int value)
+{
+ writel_relaxed(value, timer->irq_ena);
+ __omap_dm_timer_write(timer, OMAP_TIMER_WAKEUP_EN_REG, value, 0);
+}
+
+static inline unsigned int
+__omap_dm_timer_read_counter(struct omap_dm_timer *timer, int posted)
+{
+ return __omap_dm_timer_read(timer, OMAP_TIMER_COUNTER_REG, posted);
+}
+
+static inline void __omap_dm_timer_write_status(struct omap_dm_timer *timer,
+ unsigned int value)
+{
+ writel_relaxed(value, timer->irq_stat);
+}
+
+#endif /* __ASM_ARCH_DMTIMER_H */
diff --git a/kernel/arch/arm/plat-omap/include/plat/i2c.h b/kernel/arch/arm/plat-omap/include/plat/i2c.h
new file mode 100644
index 000000000..810629d79
--- /dev/null
+++ b/kernel/arch/arm/plat-omap/include/plat/i2c.h
@@ -0,0 +1,53 @@
+/*
+ * Helper module for board specific I2C bus registration
+ *
+ * Copyright (C) 2009 Nokia Corporation.
+ *
+ * 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.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
+ * 02110-1301 USA
+ *
+ */
+
+#ifndef __PLAT_OMAP_I2C_H
+#define __PLAT_OMAP_I2C_H
+
+struct i2c_board_info;
+struct omap_i2c_bus_platform_data;
+
+int omap_i2c_add_bus(struct omap_i2c_bus_platform_data *i2c_pdata,
+ int bus_id);
+
+#if defined(CONFIG_I2C_OMAP) || defined(CONFIG_I2C_OMAP_MODULE)
+extern int omap_register_i2c_bus(int bus_id, u32 clkrate,
+ struct i2c_board_info const *info,
+ unsigned len);
+extern int omap_register_i2c_bus_cmdline(void);
+#else
+static inline int omap_register_i2c_bus(int bus_id, u32 clkrate,
+ struct i2c_board_info const *info,
+ unsigned len)
+{
+ return 0;
+}
+
+static inline int omap_register_i2c_bus_cmdline(void)
+{
+ return 0;
+}
+#endif
+
+struct omap_hwmod;
+int omap_i2c_reset(struct omap_hwmod *oh);
+
+#endif /* __PLAT_OMAP_I2C_H */
diff --git a/kernel/arch/arm/plat-omap/include/plat/sram.h b/kernel/arch/arm/plat-omap/include/plat/sram.h
new file mode 100644
index 000000000..ba4525059
--- /dev/null
+++ b/kernel/arch/arm/plat-omap/include/plat/sram.h
@@ -0,0 +1,16 @@
+int omap_sram_init(void);
+
+void omap_map_sram(unsigned long start, unsigned long size,
+ unsigned long skip, int cached);
+void omap_sram_reset(void);
+
+extern void *omap_sram_push_address(unsigned long size);
+
+/* Macro to push a function to the internal SRAM, using the fncpy API */
+#define omap_sram_push(funcp, size) ({ \
+ typeof(&(funcp)) _res = NULL; \
+ void *_sram_address = omap_sram_push_address(size); \
+ if (_sram_address) \
+ _res = fncpy(_sram_address, &(funcp), size); \
+ _res; \
+})
diff --git a/kernel/arch/arm/plat-omap/sram.c b/kernel/arch/arm/plat-omap/sram.c
new file mode 100644
index 000000000..a5bc92d7e
--- /dev/null
+++ b/kernel/arch/arm/plat-omap/sram.c
@@ -0,0 +1,98 @@
+/*
+ * linux/arch/arm/plat-omap/sram.c
+ *
+ * OMAP SRAM detection and management
+ *
+ * Copyright (C) 2005 Nokia Corporation
+ * Written by Tony Lindgren <tony@atomide.com>
+ *
+ * Copyright (C) 2009-2012 Texas Instruments
+ * Added OMAP4/5 support - Santosh Shilimkar <santosh.shilimkar@ti.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.
+ */
+#undef DEBUG
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/io.h>
+
+#include <asm/fncpy.h>
+#include <asm/tlb.h>
+#include <asm/cacheflush.h>
+
+#include <asm/mach/map.h>
+
+#include <plat/sram.h>
+
+#define ROUND_DOWN(value,boundary) ((value) & (~((boundary)-1)))
+
+static void __iomem *omap_sram_base;
+static unsigned long omap_sram_skip;
+static unsigned long omap_sram_size;
+static void __iomem *omap_sram_ceil;
+
+/*
+ * Memory allocator for SRAM: calculates the new ceiling address
+ * for pushing a function using the fncpy API.
+ *
+ * Note that fncpy requires the returned address to be aligned
+ * to an 8-byte boundary.
+ */
+void *omap_sram_push_address(unsigned long size)
+{
+ unsigned long available, new_ceil = (unsigned long)omap_sram_ceil;
+
+ available = omap_sram_ceil - (omap_sram_base + omap_sram_skip);
+
+ if (size > available) {
+ pr_err("Not enough space in SRAM\n");
+ return NULL;
+ }
+
+ new_ceil -= size;
+ new_ceil = ROUND_DOWN(new_ceil, FNCPY_ALIGN);
+ omap_sram_ceil = IOMEM(new_ceil);
+
+ return (void *)omap_sram_ceil;
+}
+
+/*
+ * The SRAM context is lost during off-idle and stack
+ * needs to be reset.
+ */
+void omap_sram_reset(void)
+{
+ omap_sram_ceil = omap_sram_base + omap_sram_size;
+}
+
+/*
+ * Note that we cannot use ioremap for SRAM, as clock init needs SRAM early.
+ */
+void __init omap_map_sram(unsigned long start, unsigned long size,
+ unsigned long skip, int cached)
+{
+ if (size == 0)
+ return;
+
+ start = ROUND_DOWN(start, PAGE_SIZE);
+ omap_sram_size = size;
+ omap_sram_skip = skip;
+ omap_sram_base = __arm_ioremap_exec(start, size, cached);
+ if (!omap_sram_base) {
+ pr_err("SRAM: Could not map\n");
+ return;
+ }
+
+ omap_sram_reset();
+
+ /*
+ * Looks like we need to preserve some bootloader code at the
+ * beginning of SRAM for jumping to flash for reboot to work...
+ */
+ memset_io(omap_sram_base + omap_sram_skip, 0,
+ omap_sram_size - omap_sram_skip);
+}