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/* linux/arch/arm/plat-s3c64xx/cpu.c
*
* Copyright 2008 Openmoko, Inc.
* Copyright 2008 Simtec Electronics
* Ben Dooks <ben@simtec.co.uk>
* http://armlinux.simtec.co.uk/
*
* S3C64XX CPU Support
*
* 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/init.h>
#include <linux/module.h>
#include <linux/interrupt.h>
#include <linux/ioport.h>
#include <linux/sysdev.h>
#include <linux/serial_core.h>
#include <linux/platform_device.h>
#include <linux/io.h>
#include <mach/hardware.h>
#include <mach/map.h>
#include <asm/mach/arch.h>
#include <asm/mach/map.h>
#include <plat/regs-serial.h>
#include <plat/cpu.h>
#include <plat/devs.h>
#include <plat/clock.h>
#include <plat/s3c6400.h>
#include <plat/s3c6410.h>
/* table of supported CPUs */
static const char name_s3c6400[] = "S3C6400";
static const char name_s3c6410[] = "S3C6410";
static struct cpu_table cpu_ids[] __initdata = {
{
.idcode = 0x36400000,
.idmask = 0xfffff000,
.map_io = s3c6400_map_io,
.init_clocks = s3c6400_init_clocks,
.init_uarts = s3c6400_init_uarts,
.init = s3c6400_init,
.name = name_s3c6400,
}, {
.idcode = 0x36410100,
.idmask = 0xffffff00,
.map_io = s3c6410_map_io,
.init_clocks = s3c6410_init_clocks,
.init_uarts = s3c6410_init_uarts,
.init = s3c6410_init,
.name = name_s3c6410,
},
};
/* minimal IO mapping */
/* see notes on uart map in arch/arm/mach-s3c6400/include/mach/debug-macro.S */
#define UART_OFFS (S3C_PA_UART & 0xfffff)
static struct map_desc s3c_iodesc[] __initdata = {
{
.virtual = (unsigned long)S3C_VA_SYS,
.pfn = __phys_to_pfn(S3C64XX_PA_SYSCON),
.length = SZ_4K,
.type = MT_DEVICE,
}, {
.virtual = (unsigned long)(S3C_VA_UART + UART_OFFS),
.pfn = __phys_to_pfn(S3C_PA_UART),
.length = SZ_4K,
.type = MT_DEVICE,
}, {
.virtual = (unsigned long)S3C_VA_VIC0,
.pfn = __phys_to_pfn(S3C64XX_PA_VIC0),
.length = SZ_16K,
.type = MT_DEVICE,
}, {
.virtual = (unsigned long)S3C_VA_VIC1,
.pfn = __phys_to_pfn(S3C64XX_PA_VIC1),
.length = SZ_16K,
.type = MT_DEVICE,
}, {
.virtual = (unsigned long)S3C_VA_TIMER,
.pfn = __phys_to_pfn(S3C_PA_TIMER),
.length = SZ_16K,
.type = MT_DEVICE,
}, {
.virtual = (unsigned long)S3C64XX_VA_GPIO,
.pfn = __phys_to_pfn(S3C64XX_PA_GPIO),
.length = SZ_4K,
.type = MT_DEVICE,
}, {
.virtual = (unsigned long)S3C64XX_VA_MODEM,
.pfn = __phys_to_pfn(S3C64XX_PA_MODEM),
.length = SZ_4K,
.type = MT_DEVICE,
}, {
.virtual = (unsigned long)S3C_VA_WATCHDOG,
.pfn = __phys_to_pfn(S3C64XX_PA_WATCHDOG),
.length = SZ_4K,
.type = MT_DEVICE,
},
};
struct sysdev_class s3c64xx_sysclass = {
.name = "s3c64xx-core",
};
static struct sys_device s3c64xx_sysdev = {
.cls = &s3c64xx_sysclass,
};
/* read cpu identification code */
void __init s3c64xx_init_io(struct map_desc *mach_desc, int size)
{
unsigned long idcode;
/* initialise the io descriptors we need for initialisation */
iotable_init(s3c_iodesc, ARRAY_SIZE(s3c_iodesc));
iotable_init(mach_desc, size);
idcode = __raw_readl(S3C_VA_SYS + 0x118);
if (!idcode) {
/* S3C6400 has the ID register in a different place,
* and needs a write before it can be read. */
__raw_writel(0x0, S3C_VA_SYS + 0xA1C);
idcode = __raw_readl(S3C_VA_SYS + 0xA1C);
}
s3c_init_cpu(idcode, cpu_ids, ARRAY_SIZE(cpu_ids));
}
static __init int s3c64xx_sysdev_init(void)
{
sysdev_class_register(&s3c64xx_sysclass);
return sysdev_register(&s3c64xx_sysdev);
}
core_initcall(s3c64xx_sysdev_init);
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