| /* 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_MEM, |
| .pfn = __phys_to_pfn(S3C64XX_PA_SROM), |
| .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)VA_VIC0, |
| .pfn = __phys_to_pfn(S3C64XX_PA_VIC0), |
| .length = SZ_16K, |
| .type = MT_DEVICE, |
| }, { |
| .virtual = (unsigned long)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, |
| }, { |
| .virtual = (unsigned long)S3C_VA_USB_HSPHY, |
| .pfn = __phys_to_pfn(S3C64XX_PA_USB_HSPHY), |
| .length = SZ_1K, |
| .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); |