diff options
Diffstat (limited to 'kernel/arch/arm/plat-iop')
| -rw-r--r-- | kernel/arch/arm/plat-iop/Makefile | 27 | ||||
| -rw-r--r-- | kernel/arch/arm/plat-iop/adma.c | 205 | ||||
| -rw-r--r-- | kernel/arch/arm/plat-iop/cp6.c | 51 | ||||
| -rw-r--r-- | kernel/arch/arm/plat-iop/i2c.c | 79 | ||||
| -rw-r--r-- | kernel/arch/arm/plat-iop/pci.c | 404 | ||||
| -rw-r--r-- | kernel/arch/arm/plat-iop/pmu.c | 39 | ||||
| -rw-r--r-- | kernel/arch/arm/plat-iop/restart.c | 20 | ||||
| -rw-r--r-- | kernel/arch/arm/plat-iop/setup.c | 34 | ||||
| -rw-r--r-- | kernel/arch/arm/plat-iop/time.c | 170 |
9 files changed, 1029 insertions, 0 deletions
diff --git a/kernel/arch/arm/plat-iop/Makefile b/kernel/arch/arm/plat-iop/Makefile new file mode 100644 index 000000000..f2af203d6 --- /dev/null +++ b/kernel/arch/arm/plat-iop/Makefile @@ -0,0 +1,27 @@ +# +# Makefile for the linux kernel. +# + +# IOP32X +obj-$(CONFIG_ARCH_IOP32X) += i2c.o +obj-$(CONFIG_ARCH_IOP32X) += pci.o +obj-$(CONFIG_ARCH_IOP32X) += setup.o +obj-$(CONFIG_ARCH_IOP32X) += time.o +obj-$(CONFIG_ARCH_IOP32X) += cp6.o +obj-$(CONFIG_ARCH_IOP32X) += adma.o +obj-$(CONFIG_ARCH_IOP32X) += pmu.o +obj-$(CONFIG_ARCH_IOP32X) += restart.o + +# IOP33X +obj-$(CONFIG_ARCH_IOP33X) += i2c.o +obj-$(CONFIG_ARCH_IOP33X) += pci.o +obj-$(CONFIG_ARCH_IOP33X) += setup.o +obj-$(CONFIG_ARCH_IOP33X) += time.o +obj-$(CONFIG_ARCH_IOP33X) += cp6.o +obj-$(CONFIG_ARCH_IOP33X) += adma.o +obj-$(CONFIG_ARCH_IOP33X) += pmu.o +obj-$(CONFIG_ARCH_IOP33X) += restart.o + +# IOP13XX +obj-$(CONFIG_ARCH_IOP13XX) += cp6.o +obj-$(CONFIG_ARCH_IOP13XX) += time.o diff --git a/kernel/arch/arm/plat-iop/adma.c b/kernel/arch/arm/plat-iop/adma.c new file mode 100644 index 000000000..a4d1f8de3 --- /dev/null +++ b/kernel/arch/arm/plat-iop/adma.c @@ -0,0 +1,205 @@ +/* + * platform device definitions for the iop3xx dma/xor engines + * Copyright © 2006, Intel Corporation. + * + * This program is free software; you can redistribute it and/or modify it + * under the terms and conditions of the GNU General Public License, + * version 2, as published by the Free Software Foundation. + * + * This program is distributed in the hope 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/platform_device.h> +#include <asm/hardware/iop3xx.h> +#include <linux/dma-mapping.h> +#include <mach/adma.h> +#include <asm/hardware/iop_adma.h> + +#ifdef CONFIG_ARCH_IOP32X +#define IRQ_DMA0_EOT IRQ_IOP32X_DMA0_EOT +#define IRQ_DMA0_EOC IRQ_IOP32X_DMA0_EOC +#define IRQ_DMA0_ERR IRQ_IOP32X_DMA0_ERR + +#define IRQ_DMA1_EOT IRQ_IOP32X_DMA1_EOT +#define IRQ_DMA1_EOC IRQ_IOP32X_DMA1_EOC +#define IRQ_DMA1_ERR IRQ_IOP32X_DMA1_ERR + +#define IRQ_AA_EOT IRQ_IOP32X_AA_EOT +#define IRQ_AA_EOC IRQ_IOP32X_AA_EOC +#define IRQ_AA_ERR IRQ_IOP32X_AA_ERR +#endif +#ifdef CONFIG_ARCH_IOP33X +#define IRQ_DMA0_EOT IRQ_IOP33X_DMA0_EOT +#define IRQ_DMA0_EOC IRQ_IOP33X_DMA0_EOC +#define IRQ_DMA0_ERR IRQ_IOP33X_DMA0_ERR + +#define IRQ_DMA1_EOT IRQ_IOP33X_DMA1_EOT +#define IRQ_DMA1_EOC IRQ_IOP33X_DMA1_EOC +#define IRQ_DMA1_ERR IRQ_IOP33X_DMA1_ERR + +#define IRQ_AA_EOT IRQ_IOP33X_AA_EOT +#define IRQ_AA_EOC IRQ_IOP33X_AA_EOC +#define IRQ_AA_ERR IRQ_IOP33X_AA_ERR +#endif +/* AAU and DMA Channels */ +static struct resource iop3xx_dma_0_resources[] = { + [0] = { + .start = IOP3XX_DMA_PHYS_BASE(0), + .end = IOP3XX_DMA_UPPER_PA(0), + .flags = IORESOURCE_MEM, + }, + [1] = { + .start = IRQ_DMA0_EOT, + .end = IRQ_DMA0_EOT, + .flags = IORESOURCE_IRQ + }, + [2] = { + .start = IRQ_DMA0_EOC, + .end = IRQ_DMA0_EOC, + .flags = IORESOURCE_IRQ + }, + [3] = { + .start = IRQ_DMA0_ERR, + .end = IRQ_DMA0_ERR, + .flags = IORESOURCE_IRQ + } +}; + +static struct resource iop3xx_dma_1_resources[] = { + [0] = { + .start = IOP3XX_DMA_PHYS_BASE(1), + .end = IOP3XX_DMA_UPPER_PA(1), + .flags = IORESOURCE_MEM, + }, + [1] = { + .start = IRQ_DMA1_EOT, + .end = IRQ_DMA1_EOT, + .flags = IORESOURCE_IRQ + }, + [2] = { + .start = IRQ_DMA1_EOC, + .end = IRQ_DMA1_EOC, + .flags = IORESOURCE_IRQ + }, + [3] = { + .start = IRQ_DMA1_ERR, + .end = IRQ_DMA1_ERR, + .flags = IORESOURCE_IRQ + } +}; + + +static struct resource iop3xx_aau_resources[] = { + [0] = { + .start = IOP3XX_AAU_PHYS_BASE, + .end = IOP3XX_AAU_UPPER_PA, + .flags = IORESOURCE_MEM, + }, + [1] = { + .start = IRQ_AA_EOT, + .end = IRQ_AA_EOT, + .flags = IORESOURCE_IRQ + }, + [2] = { + .start = IRQ_AA_EOC, + .end = IRQ_AA_EOC, + .flags = IORESOURCE_IRQ + }, + [3] = { + .start = IRQ_AA_ERR, + .end = IRQ_AA_ERR, + .flags = IORESOURCE_IRQ + } +}; + +static u64 iop3xx_adma_dmamask = DMA_BIT_MASK(32); + +static struct iop_adma_platform_data iop3xx_dma_0_data = { + .hw_id = DMA0_ID, + .pool_size = PAGE_SIZE, +}; + +static struct iop_adma_platform_data iop3xx_dma_1_data = { + .hw_id = DMA1_ID, + .pool_size = PAGE_SIZE, +}; + +static struct iop_adma_platform_data iop3xx_aau_data = { + .hw_id = AAU_ID, + .pool_size = 3 * PAGE_SIZE, +}; + +struct platform_device iop3xx_dma_0_channel = { + .name = "iop-adma", + .id = 0, + .num_resources = 4, + .resource = iop3xx_dma_0_resources, + .dev = { + .dma_mask = &iop3xx_adma_dmamask, + .coherent_dma_mask = DMA_BIT_MASK(64), + .platform_data = (void *) &iop3xx_dma_0_data, + }, +}; + +struct platform_device iop3xx_dma_1_channel = { + .name = "iop-adma", + .id = 1, + .num_resources = 4, + .resource = iop3xx_dma_1_resources, + .dev = { + .dma_mask = &iop3xx_adma_dmamask, + .coherent_dma_mask = DMA_BIT_MASK(64), + .platform_data = (void *) &iop3xx_dma_1_data, + }, +}; + +struct platform_device iop3xx_aau_channel = { + .name = "iop-adma", + .id = 2, + .num_resources = 4, + .resource = iop3xx_aau_resources, + .dev = { + .dma_mask = &iop3xx_adma_dmamask, + .coherent_dma_mask = DMA_BIT_MASK(64), + .platform_data = (void *) &iop3xx_aau_data, + }, +}; + +static int __init iop3xx_adma_cap_init(void) +{ + #ifdef CONFIG_ARCH_IOP32X /* the 32x DMA does not perform CRC32C */ + dma_cap_set(DMA_MEMCPY, iop3xx_dma_0_data.cap_mask); + dma_cap_set(DMA_INTERRUPT, iop3xx_dma_0_data.cap_mask); + #else + dma_cap_set(DMA_MEMCPY, iop3xx_dma_0_data.cap_mask); + dma_cap_set(DMA_INTERRUPT, iop3xx_dma_0_data.cap_mask); + #endif + + #ifdef CONFIG_ARCH_IOP32X /* the 32x DMA does not perform CRC32C */ + dma_cap_set(DMA_MEMCPY, iop3xx_dma_1_data.cap_mask); + dma_cap_set(DMA_INTERRUPT, iop3xx_dma_1_data.cap_mask); + #else + dma_cap_set(DMA_MEMCPY, iop3xx_dma_1_data.cap_mask); + dma_cap_set(DMA_INTERRUPT, iop3xx_dma_1_data.cap_mask); + #endif + + #ifdef CONFIG_ARCH_IOP32X /* the 32x AAU does not perform zero sum */ + dma_cap_set(DMA_XOR, iop3xx_aau_data.cap_mask); + dma_cap_set(DMA_INTERRUPT, iop3xx_aau_data.cap_mask); + #else + dma_cap_set(DMA_XOR, iop3xx_aau_data.cap_mask); + dma_cap_set(DMA_XOR_VAL, iop3xx_aau_data.cap_mask); + dma_cap_set(DMA_INTERRUPT, iop3xx_aau_data.cap_mask); + #endif + + return 0; +} + +arch_initcall(iop3xx_adma_cap_init); diff --git a/kernel/arch/arm/plat-iop/cp6.c b/kernel/arch/arm/plat-iop/cp6.c new file mode 100644 index 000000000..bab73e2c7 --- /dev/null +++ b/kernel/arch/arm/plat-iop/cp6.c @@ -0,0 +1,51 @@ +/* + * IOP Coprocessor-6 access handler + * Copyright (c) 2006, Intel Corporation. + * + * This program is free software; you can redistribute it and/or modify it + * under the terms and conditions of the GNU General Public License, + * version 2, as published by the Free Software Foundation. + * + * This program is distributed in the hope 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. + * + */ +#include <linux/init.h> +#include <asm/traps.h> +#include <asm/ptrace.h> + +static int cp6_trap(struct pt_regs *regs, unsigned int instr) +{ + u32 temp; + + /* enable cp6 access */ + asm volatile ( + "mrc p15, 0, %0, c15, c1, 0\n\t" + "orr %0, %0, #(1 << 6)\n\t" + "mcr p15, 0, %0, c15, c1, 0\n\t" + : "=r"(temp)); + + return 0; +} + +/* permit kernel space cp6 access + * deny user space cp6 access + */ +static struct undef_hook cp6_hook = { + .instr_mask = 0x0f000ff0, + .instr_val = 0x0e000610, + .cpsr_mask = MODE_MASK, + .cpsr_val = SVC_MODE, + .fn = cp6_trap, +}; + +void __init iop_init_cp6_handler(void) +{ + register_undef_hook(&cp6_hook); +} diff --git a/kernel/arch/arm/plat-iop/i2c.c b/kernel/arch/arm/plat-iop/i2c.c new file mode 100644 index 000000000..88215ad03 --- /dev/null +++ b/kernel/arch/arm/plat-iop/i2c.c @@ -0,0 +1,79 @@ +/* + * arch/arm/plat-iop/i2c.c + * + * Author: Nicolas Pitre <nico@cam.org> + * Copyright (C) 2001 MontaVista Software, Inc. + * Copyright (C) 2004 Intel 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. + */ + +#include <linux/mm.h> +#include <linux/init.h> +#include <linux/major.h> +#include <linux/fs.h> +#include <linux/platform_device.h> +#include <linux/serial.h> +#include <linux/tty.h> +#include <linux/serial_core.h> +#include <linux/io.h> +#include <asm/pgtable.h> +#include <asm/page.h> +#include <asm/mach/map.h> +#include <asm/setup.h> +#include <asm/memory.h> +#include <mach/hardware.h> +#include <asm/hardware/iop3xx.h> +#include <asm/mach/arch.h> + +#ifdef CONFIG_ARCH_IOP32X +#define IRQ_IOP3XX_I2C_0 IRQ_IOP32X_I2C_0 +#define IRQ_IOP3XX_I2C_1 IRQ_IOP32X_I2C_1 +#endif +#ifdef CONFIG_ARCH_IOP33X +#define IRQ_IOP3XX_I2C_0 IRQ_IOP33X_I2C_0 +#define IRQ_IOP3XX_I2C_1 IRQ_IOP33X_I2C_1 +#endif + +static struct resource iop3xx_i2c0_resources[] = { + [0] = { + .start = 0xfffff680, + .end = 0xfffff697, + .flags = IORESOURCE_MEM, + }, + [1] = { + .start = IRQ_IOP3XX_I2C_0, + .end = IRQ_IOP3XX_I2C_0, + .flags = IORESOURCE_IRQ, + }, +}; + +struct platform_device iop3xx_i2c0_device = { + .name = "IOP3xx-I2C", + .id = 0, + .num_resources = 2, + .resource = iop3xx_i2c0_resources, +}; + + +static struct resource iop3xx_i2c1_resources[] = { + [0] = { + .start = 0xfffff6a0, + .end = 0xfffff6b7, + .flags = IORESOURCE_MEM, + }, + [1] = { + .start = IRQ_IOP3XX_I2C_1, + .end = IRQ_IOP3XX_I2C_1, + .flags = IORESOURCE_IRQ, + } +}; + +struct platform_device iop3xx_i2c1_device = { + .name = "IOP3xx-I2C", + .id = 1, + .num_resources = 2, + .resource = iop3xx_i2c1_resources, +}; diff --git a/kernel/arch/arm/plat-iop/pci.c b/kernel/arch/arm/plat-iop/pci.c new file mode 100644 index 000000000..362474b5c --- /dev/null +++ b/kernel/arch/arm/plat-iop/pci.c @@ -0,0 +1,404 @@ +/* + * arch/arm/plat-iop/pci.c + * + * PCI support for the Intel IOP32X and IOP33X processors + * + * Author: Rory Bolt <rorybolt@pacbell.net> + * Copyright (C) 2002 Rory Bolt + * + * 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/pci.h> +#include <linux/slab.h> +#include <linux/mm.h> +#include <linux/init.h> +#include <linux/ioport.h> +#include <linux/io.h> +#include <asm/irq.h> +#include <asm/signal.h> +#include <mach/hardware.h> +#include <asm/mach/pci.h> +#include <asm/hardware/iop3xx.h> + +// #define DEBUG + +#ifdef DEBUG +#define DBG(x...) printk(x) +#else +#define DBG(x...) do { } while (0) +#endif + +/* + * This routine builds either a type0 or type1 configuration command. If the + * bus is on the 803xx then a type0 made, else a type1 is created. + */ +static u32 iop3xx_cfg_address(struct pci_bus *bus, int devfn, int where) +{ + struct pci_sys_data *sys = bus->sysdata; + u32 addr; + + if (sys->busnr == bus->number) + addr = 1 << (PCI_SLOT(devfn) + 16) | (PCI_SLOT(devfn) << 11); + else + addr = bus->number << 16 | PCI_SLOT(devfn) << 11 | 1; + + addr |= PCI_FUNC(devfn) << 8 | (where & ~3); + + return addr; +} + +/* + * This routine checks the status of the last configuration cycle. If an error + * was detected it returns a 1, else it returns a 0. The errors being checked + * are parity, master abort, target abort (master and target). These types of + * errors occur during a config cycle where there is no device, like during + * the discovery stage. + */ +static int iop3xx_pci_status(void) +{ + unsigned int status; + int ret = 0; + + /* + * Check the status registers. + */ + status = *IOP3XX_ATUSR; + if (status & 0xf900) { + DBG("\t\t\tPCI: P0 - status = 0x%08x\n", status); + *IOP3XX_ATUSR = status & 0xf900; + ret = 1; + } + + status = *IOP3XX_ATUISR; + if (status & 0x679f) { + DBG("\t\t\tPCI: P1 - status = 0x%08x\n", status); + *IOP3XX_ATUISR = status & 0x679f; + ret = 1; + } + + return ret; +} + +/* + * Simply write the address register and read the configuration + * data. Note that the 4 nops ensure that we are able to handle + * a delayed abort (in theory.) + */ +static u32 iop3xx_read(unsigned long addr) +{ + u32 val; + + __asm__ __volatile__( + "str %1, [%2]\n\t" + "ldr %0, [%3]\n\t" + "nop\n\t" + "nop\n\t" + "nop\n\t" + "nop\n\t" + : "=r" (val) + : "r" (addr), "r" (IOP3XX_OCCAR), "r" (IOP3XX_OCCDR)); + + return val; +} + +/* + * The read routines must check the error status of the last configuration + * cycle. If there was an error, the routine returns all hex f's. + */ +static int +iop3xx_read_config(struct pci_bus *bus, unsigned int devfn, int where, + int size, u32 *value) +{ + unsigned long addr = iop3xx_cfg_address(bus, devfn, where); + u32 val = iop3xx_read(addr) >> ((where & 3) * 8); + + if (iop3xx_pci_status()) + val = 0xffffffff; + + *value = val; + + return PCIBIOS_SUCCESSFUL; +} + +static int +iop3xx_write_config(struct pci_bus *bus, unsigned int devfn, int where, + int size, u32 value) +{ + unsigned long addr = iop3xx_cfg_address(bus, devfn, where); + u32 val; + + if (size != 4) { + val = iop3xx_read(addr); + if (iop3xx_pci_status()) + return PCIBIOS_SUCCESSFUL; + + where = (where & 3) * 8; + + if (size == 1) + val &= ~(0xff << where); + else + val &= ~(0xffff << where); + + *IOP3XX_OCCDR = val | value << where; + } else { + asm volatile( + "str %1, [%2]\n\t" + "str %0, [%3]\n\t" + "nop\n\t" + "nop\n\t" + "nop\n\t" + "nop\n\t" + : + : "r" (value), "r" (addr), + "r" (IOP3XX_OCCAR), "r" (IOP3XX_OCCDR)); + } + + return PCIBIOS_SUCCESSFUL; +} + +struct pci_ops iop3xx_ops = { + .read = iop3xx_read_config, + .write = iop3xx_write_config, +}; + +/* + * When a PCI device does not exist during config cycles, the 80200 gets a + * bus error instead of returning 0xffffffff. This handler simply returns. + */ +static int +iop3xx_pci_abort(unsigned long addr, unsigned int fsr, struct pt_regs *regs) +{ + DBG("PCI abort: address = 0x%08lx fsr = 0x%03x PC = 0x%08lx LR = 0x%08lx\n", + addr, fsr, regs->ARM_pc, regs->ARM_lr); + + /* + * If it was an imprecise abort, then we need to correct the + * return address to be _after_ the instruction. + */ + if (fsr & (1 << 10)) + regs->ARM_pc += 4; + + return 0; +} + +int iop3xx_pci_setup(int nr, struct pci_sys_data *sys) +{ + struct resource *res; + + if (nr != 0) + return 0; + + res = kzalloc(sizeof(struct resource), GFP_KERNEL); + if (!res) + panic("PCI: unable to alloc resources"); + + res->start = IOP3XX_PCI_LOWER_MEM_PA; + res->end = IOP3XX_PCI_LOWER_MEM_PA + IOP3XX_PCI_MEM_WINDOW_SIZE - 1; + res->name = "IOP3XX PCI Memory Space"; + res->flags = IORESOURCE_MEM; + request_resource(&iomem_resource, res); + + /* + * Use whatever translation is already setup. + */ + sys->mem_offset = IOP3XX_PCI_LOWER_MEM_PA - *IOP3XX_OMWTVR0; + + pci_add_resource_offset(&sys->resources, res, sys->mem_offset); + + pci_ioremap_io(0, IOP3XX_PCI_LOWER_IO_PA); + + return 1; +} + +void __init iop3xx_atu_setup(void) +{ + /* BAR 0 ( Disabled ) */ + *IOP3XX_IAUBAR0 = 0x0; + *IOP3XX_IABAR0 = 0x0; + *IOP3XX_IATVR0 = 0x0; + *IOP3XX_IALR0 = 0x0; + + /* BAR 1 ( Disabled ) */ + *IOP3XX_IAUBAR1 = 0x0; + *IOP3XX_IABAR1 = 0x0; + *IOP3XX_IALR1 = 0x0; + + /* BAR 2 (1:1 mapping with Physical RAM) */ + /* Set limit and enable */ + *IOP3XX_IALR2 = ~((u32)IOP3XX_MAX_RAM_SIZE - 1) & ~0x1; + *IOP3XX_IAUBAR2 = 0x0; + + /* Align the inbound bar with the base of memory */ + *IOP3XX_IABAR2 = PHYS_OFFSET | + PCI_BASE_ADDRESS_MEM_TYPE_64 | + PCI_BASE_ADDRESS_MEM_PREFETCH; + + *IOP3XX_IATVR2 = PHYS_OFFSET; + + /* Outbound window 0 */ + *IOP3XX_OMWTVR0 = IOP3XX_PCI_LOWER_MEM_BA; + *IOP3XX_OUMWTVR0 = 0; + + /* Outbound window 1 */ + *IOP3XX_OMWTVR1 = IOP3XX_PCI_LOWER_MEM_BA + + IOP3XX_PCI_MEM_WINDOW_SIZE / 2; + *IOP3XX_OUMWTVR1 = 0; + + /* BAR 3 ( Disabled ) */ + *IOP3XX_IAUBAR3 = 0x0; + *IOP3XX_IABAR3 = 0x0; + *IOP3XX_IATVR3 = 0x0; + *IOP3XX_IALR3 = 0x0; + + /* Setup the I/O Bar + */ + *IOP3XX_OIOWTVR = IOP3XX_PCI_LOWER_IO_BA; + + /* Enable inbound and outbound cycles + */ + *IOP3XX_ATUCMD |= PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER | + PCI_COMMAND_PARITY | PCI_COMMAND_SERR; + *IOP3XX_ATUCR |= IOP3XX_ATUCR_OUT_EN; +} + +void __init iop3xx_atu_disable(void) +{ + *IOP3XX_ATUCMD = 0; + *IOP3XX_ATUCR = 0; + + /* wait for cycles to quiesce */ + while (*IOP3XX_PCSR & (IOP3XX_PCSR_OUT_Q_BUSY | + IOP3XX_PCSR_IN_Q_BUSY)) + cpu_relax(); + + /* BAR 0 ( Disabled ) */ + *IOP3XX_IAUBAR0 = 0x0; + *IOP3XX_IABAR0 = 0x0; + *IOP3XX_IATVR0 = 0x0; + *IOP3XX_IALR0 = 0x0; + + /* BAR 1 ( Disabled ) */ + *IOP3XX_IAUBAR1 = 0x0; + *IOP3XX_IABAR1 = 0x0; + *IOP3XX_IALR1 = 0x0; + + /* BAR 2 ( Disabled ) */ + *IOP3XX_IAUBAR2 = 0x0; + *IOP3XX_IABAR2 = 0x0; + *IOP3XX_IATVR2 = 0x0; + *IOP3XX_IALR2 = 0x0; + + /* BAR 3 ( Disabled ) */ + *IOP3XX_IAUBAR3 = 0x0; + *IOP3XX_IABAR3 = 0x0; + *IOP3XX_IATVR3 = 0x0; + *IOP3XX_IALR3 = 0x0; + + /* Clear the outbound windows */ + *IOP3XX_OIOWTVR = 0; + + /* Outbound window 0 */ + *IOP3XX_OMWTVR0 = 0; + *IOP3XX_OUMWTVR0 = 0; + + /* Outbound window 1 */ + *IOP3XX_OMWTVR1 = 0; + *IOP3XX_OUMWTVR1 = 0; +} + +/* Flag to determine whether the ATU is initialized and the PCI bus scanned */ +int init_atu; + +int iop3xx_get_init_atu(void) { + /* check if default has been overridden */ + if (init_atu != IOP3XX_INIT_ATU_DEFAULT) + return init_atu; + else + return IOP3XX_INIT_ATU_DISABLE; +} + +static void __init iop3xx_atu_debug(void) +{ + DBG("PCI: Intel IOP3xx PCI init.\n"); + DBG("PCI: Outbound memory window 0: PCI 0x%08x%08x\n", + *IOP3XX_OUMWTVR0, *IOP3XX_OMWTVR0); + DBG("PCI: Outbound memory window 1: PCI 0x%08x%08x\n", + *IOP3XX_OUMWTVR1, *IOP3XX_OMWTVR1); + DBG("PCI: Outbound IO window: PCI 0x%08x\n", + *IOP3XX_OIOWTVR); + + DBG("PCI: Inbound memory window 0: PCI 0x%08x%08x 0x%08x -> 0x%08x\n", + *IOP3XX_IAUBAR0, *IOP3XX_IABAR0, *IOP3XX_IALR0, *IOP3XX_IATVR0); + DBG("PCI: Inbound memory window 1: PCI 0x%08x%08x 0x%08x\n", + *IOP3XX_IAUBAR1, *IOP3XX_IABAR1, *IOP3XX_IALR1); + DBG("PCI: Inbound memory window 2: PCI 0x%08x%08x 0x%08x -> 0x%08x\n", + *IOP3XX_IAUBAR2, *IOP3XX_IABAR2, *IOP3XX_IALR2, *IOP3XX_IATVR2); + DBG("PCI: Inbound memory window 3: PCI 0x%08x%08x 0x%08x -> 0x%08x\n", + *IOP3XX_IAUBAR3, *IOP3XX_IABAR3, *IOP3XX_IALR3, *IOP3XX_IATVR3); + + DBG("PCI: Expansion ROM window: PCI 0x%08x%08x 0x%08x -> 0x%08x\n", + 0, *IOP3XX_ERBAR, *IOP3XX_ERLR, *IOP3XX_ERTVR); + + DBG("ATU: IOP3XX_ATUCMD=0x%04x\n", *IOP3XX_ATUCMD); + DBG("ATU: IOP3XX_ATUCR=0x%08x\n", *IOP3XX_ATUCR); + + hook_fault_code(16+6, iop3xx_pci_abort, SIGBUS, 0, "imprecise external abort"); +} + +/* for platforms that might be host-bus-adapters */ +void __init iop3xx_pci_preinit_cond(void) +{ + if (iop3xx_get_init_atu() == IOP3XX_INIT_ATU_ENABLE) { + iop3xx_atu_disable(); + iop3xx_atu_setup(); + iop3xx_atu_debug(); + } +} + +void __init iop3xx_pci_preinit(void) +{ + pcibios_min_mem = 0; + + iop3xx_atu_disable(); + iop3xx_atu_setup(); + iop3xx_atu_debug(); +} + +/* allow init_atu to be user overridden */ +static int __init iop3xx_init_atu_setup(char *str) +{ + init_atu = IOP3XX_INIT_ATU_DEFAULT; + if (str) { + while (*str != '\0') { + switch (*str) { + case 'y': + case 'Y': + init_atu = IOP3XX_INIT_ATU_ENABLE; + break; + case 'n': + case 'N': + init_atu = IOP3XX_INIT_ATU_DISABLE; + break; + case ',': + case '=': + break; + default: + printk(KERN_DEBUG "\"%s\" malformed at " + "character: \'%c\'", + __func__, + *str); + *(str + 1) = '\0'; + } + str++; + } + } + + return 1; +} + +__setup("iop3xx_init_atu", iop3xx_init_atu_setup); + diff --git a/kernel/arch/arm/plat-iop/pmu.c b/kernel/arch/arm/plat-iop/pmu.c new file mode 100644 index 000000000..c6d979ace --- /dev/null +++ b/kernel/arch/arm/plat-iop/pmu.c @@ -0,0 +1,39 @@ +/* + * PMU IRQ registration for the iop3xx xscale PMU families. + * Copyright (C) 2010 Will Deacon, ARM Ltd. + * + * 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/platform_device.h> +#include <mach/irqs.h> + +static struct resource pmu_resource = { +#ifdef CONFIG_ARCH_IOP32X + .start = IRQ_IOP32X_CORE_PMU, + .end = IRQ_IOP32X_CORE_PMU, +#endif +#ifdef CONFIG_ARCH_IOP33X + .start = IRQ_IOP33X_CORE_PMU, + .end = IRQ_IOP33X_CORE_PMU, +#endif + .flags = IORESOURCE_IRQ, +}; + +static struct platform_device pmu_device = { + .name = "xscale-pmu", + .id = -1, + .resource = &pmu_resource, + .num_resources = 1, +}; + +static int __init iop3xx_pmu_init(void) +{ + platform_device_register(&pmu_device); + return 0; +} + +arch_initcall(iop3xx_pmu_init); diff --git a/kernel/arch/arm/plat-iop/restart.c b/kernel/arch/arm/plat-iop/restart.c new file mode 100644 index 000000000..3a4d5e5fd --- /dev/null +++ b/kernel/arch/arm/plat-iop/restart.c @@ -0,0 +1,20 @@ +/* + * restart.c + * + * Copyright (C) 2001 MontaVista Software, Inc. + * + * 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 <asm/hardware/iop3xx.h> +#include <asm/system_misc.h> +#include <mach/hardware.h> + +void iop3xx_restart(enum reboot_mode mode, const char *cmd) +{ + *IOP3XX_PCSR = 0x30; + + /* Jump into ROM at address 0 */ + soft_restart(0); +} diff --git a/kernel/arch/arm/plat-iop/setup.c b/kernel/arch/arm/plat-iop/setup.c new file mode 100644 index 000000000..5b217f460 --- /dev/null +++ b/kernel/arch/arm/plat-iop/setup.c @@ -0,0 +1,34 @@ +/* + * arch/arm/plat-iop/setup.c + * + * Author: Nicolas Pitre <nico@fluxnic.net> + * Copyright (C) 2001 MontaVista Software, Inc. + * Copyright (C) 2004 Intel 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. + */ + +#include <linux/mm.h> +#include <linux/init.h> +#include <asm/mach/map.h> +#include <asm/hardware/iop3xx.h> + +/* + * Standard IO mapping for all IOP3xx based systems. Note that + * the IOP3xx OCCDR must be mapped uncached and unbuffered. + */ +static struct map_desc iop3xx_std_desc[] __initdata = { + { /* mem mapped registers */ + .virtual = IOP3XX_PERIPHERAL_VIRT_BASE, + .pfn = __phys_to_pfn(IOP3XX_PERIPHERAL_PHYS_BASE), + .length = IOP3XX_PERIPHERAL_SIZE, + .type = MT_UNCACHED, + }, +}; + +void __init iop3xx_map_io(void) +{ + iotable_init(iop3xx_std_desc, ARRAY_SIZE(iop3xx_std_desc)); +} diff --git a/kernel/arch/arm/plat-iop/time.c b/kernel/arch/arm/plat-iop/time.c new file mode 100644 index 000000000..6ad65d8ae --- /dev/null +++ b/kernel/arch/arm/plat-iop/time.c @@ -0,0 +1,170 @@ +/* + * arch/arm/plat-iop/time.c + * + * Timer code for IOP32x and IOP33x based systems + * + * Author: Deepak Saxena <dsaxena@mvista.com> + * + * Copyright 2002-2003 MontaVista Software Inc. + * + * 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. + */ + +#include <linux/kernel.h> +#include <linux/interrupt.h> +#include <linux/time.h> +#include <linux/init.h> +#include <linux/timex.h> +#include <linux/io.h> +#include <linux/clocksource.h> +#include <linux/clockchips.h> +#include <linux/export.h> +#include <linux/sched_clock.h> +#include <mach/hardware.h> +#include <asm/irq.h> +#include <asm/uaccess.h> +#include <asm/mach/irq.h> +#include <asm/mach/time.h> +#include <mach/time.h> + +/* + * Minimum clocksource/clockevent timer range in seconds + */ +#define IOP_MIN_RANGE 4 + +/* + * IOP clocksource (free-running timer 1). + */ +static cycle_t notrace iop_clocksource_read(struct clocksource *unused) +{ + return 0xffffffffu - read_tcr1(); +} + +static struct clocksource iop_clocksource = { + .name = "iop_timer1", + .rating = 300, + .read = iop_clocksource_read, + .mask = CLOCKSOURCE_MASK(32), + .flags = CLOCK_SOURCE_IS_CONTINUOUS, +}; + +/* + * IOP sched_clock() implementation via its clocksource. + */ +static u64 notrace iop_read_sched_clock(void) +{ + return 0xffffffffu - read_tcr1(); +} + +/* + * IOP clockevents (interrupting timer 0). + */ +static int iop_set_next_event(unsigned long delta, + struct clock_event_device *unused) +{ + u32 tmr = IOP_TMR_PRIVILEGED | IOP_TMR_RATIO_1_1; + + BUG_ON(delta == 0); + write_tmr0(tmr & ~(IOP_TMR_EN | IOP_TMR_RELOAD)); + write_tcr0(delta); + write_tmr0((tmr & ~IOP_TMR_RELOAD) | IOP_TMR_EN); + + return 0; +} + +static unsigned long ticks_per_jiffy; + +static void iop_set_mode(enum clock_event_mode mode, + struct clock_event_device *unused) +{ + u32 tmr = read_tmr0(); + + switch (mode) { + case CLOCK_EVT_MODE_PERIODIC: + write_tmr0(tmr & ~IOP_TMR_EN); + write_tcr0(ticks_per_jiffy - 1); + write_trr0(ticks_per_jiffy - 1); + tmr |= (IOP_TMR_RELOAD | IOP_TMR_EN); + break; + case CLOCK_EVT_MODE_ONESHOT: + /* ->set_next_event sets period and enables timer */ + tmr &= ~(IOP_TMR_RELOAD | IOP_TMR_EN); + break; + case CLOCK_EVT_MODE_RESUME: + tmr |= IOP_TMR_EN; + break; + case CLOCK_EVT_MODE_SHUTDOWN: + case CLOCK_EVT_MODE_UNUSED: + default: + tmr &= ~IOP_TMR_EN; + break; + } + + write_tmr0(tmr); +} + +static struct clock_event_device iop_clockevent = { + .name = "iop_timer0", + .features = CLOCK_EVT_FEAT_PERIODIC | CLOCK_EVT_FEAT_ONESHOT, + .rating = 300, + .set_next_event = iop_set_next_event, + .set_mode = iop_set_mode, +}; + +static irqreturn_t +iop_timer_interrupt(int irq, void *dev_id) +{ + struct clock_event_device *evt = dev_id; + + write_tisr(1); + evt->event_handler(evt); + return IRQ_HANDLED; +} + +static struct irqaction iop_timer_irq = { + .name = "IOP Timer Tick", + .handler = iop_timer_interrupt, + .flags = IRQF_TIMER | IRQF_IRQPOLL, + .dev_id = &iop_clockevent, +}; + +static unsigned long iop_tick_rate; +unsigned long get_iop_tick_rate(void) +{ + return iop_tick_rate; +} +EXPORT_SYMBOL(get_iop_tick_rate); + +void __init iop_init_time(unsigned long tick_rate) +{ + u32 timer_ctl; + + sched_clock_register(iop_read_sched_clock, 32, tick_rate); + + ticks_per_jiffy = DIV_ROUND_CLOSEST(tick_rate, HZ); + iop_tick_rate = tick_rate; + + timer_ctl = IOP_TMR_EN | IOP_TMR_PRIVILEGED | + IOP_TMR_RELOAD | IOP_TMR_RATIO_1_1; + + /* + * Set up interrupting clockevent timer 0. + */ + write_tmr0(timer_ctl & ~IOP_TMR_EN); + write_tisr(1); + setup_irq(IRQ_IOP_TIMER0, &iop_timer_irq); + iop_clockevent.cpumask = cpumask_of(0); + clockevents_config_and_register(&iop_clockevent, tick_rate, + 0xf, 0xfffffffe); + + /* + * Set up free-running clocksource timer 1. + */ + write_trr1(0xffffffff); + write_tcr1(0xffffffff); + write_tmr1(timer_ctl); + clocksource_register_hz(&iop_clocksource, tick_rate); +} |