Ben Dooks | beda30f | 2008-10-21 14:06:49 +0100 | [diff] [blame] | 1 | /* linux/arch/arm/plat-s3c64xx/cpu.c |
| 2 | * |
| 3 | * Copyright 2008 Openmoko, Inc. |
| 4 | * Copyright 2008 Simtec Electronics |
| 5 | * Ben Dooks <ben@simtec.co.uk> |
| 6 | * http://armlinux.simtec.co.uk/ |
| 7 | * |
| 8 | * S3C64XX CPU Support |
| 9 | * |
| 10 | * This program is free software; you can redistribute it and/or modify |
| 11 | * it under the terms of the GNU General Public License version 2 as |
| 12 | * published by the Free Software Foundation. |
| 13 | */ |
| 14 | |
| 15 | #include <linux/init.h> |
| 16 | #include <linux/module.h> |
| 17 | #include <linux/interrupt.h> |
| 18 | #include <linux/ioport.h> |
| 19 | #include <linux/serial_core.h> |
| 20 | #include <linux/platform_device.h> |
Ben Dooks | beda30f | 2008-10-21 14:06:49 +0100 | [diff] [blame] | 21 | #include <linux/io.h> |
| 22 | |
| 23 | #include <mach/hardware.h> |
| 24 | #include <mach/map.h> |
| 25 | |
| 26 | #include <asm/mach/arch.h> |
| 27 | #include <asm/mach/map.h> |
| 28 | |
| 29 | #include <plat/regs-serial.h> |
| 30 | |
| 31 | #include <plat/cpu.h> |
| 32 | #include <plat/devs.h> |
| 33 | #include <plat/clock.h> |
| 34 | |
| 35 | #include <plat/s3c6400.h> |
| 36 | #include <plat/s3c6410.h> |
| 37 | |
| 38 | /* table of supported CPUs */ |
| 39 | |
| 40 | static const char name_s3c6400[] = "S3C6400"; |
| 41 | static const char name_s3c6410[] = "S3C6410"; |
| 42 | |
| 43 | static struct cpu_table cpu_ids[] __initdata = { |
| 44 | { |
| 45 | .idcode = 0x36400000, |
| 46 | .idmask = 0xfffff000, |
| 47 | .map_io = s3c6400_map_io, |
| 48 | .init_clocks = s3c6400_init_clocks, |
| 49 | .init_uarts = s3c6400_init_uarts, |
| 50 | .init = s3c6400_init, |
| 51 | .name = name_s3c6400, |
| 52 | }, { |
| 53 | .idcode = 0x36410100, |
| 54 | .idmask = 0xffffff00, |
| 55 | .map_io = s3c6410_map_io, |
| 56 | .init_clocks = s3c6410_init_clocks, |
| 57 | .init_uarts = s3c6410_init_uarts, |
| 58 | .init = s3c6410_init, |
| 59 | .name = name_s3c6410, |
| 60 | }, |
| 61 | }; |
| 62 | |
| 63 | /* minimal IO mapping */ |
| 64 | |
| 65 | /* see notes on uart map in arch/arm/mach-s3c6400/include/mach/debug-macro.S */ |
| 66 | #define UART_OFFS (S3C_PA_UART & 0xfffff) |
| 67 | |
| 68 | static struct map_desc s3c_iodesc[] __initdata = { |
| 69 | { |
Ben Dooks | f945ee1 | 2008-10-21 14:07:13 +0100 | [diff] [blame] | 70 | .virtual = (unsigned long)S3C_VA_SYS, |
Ben Dooks | beda30f | 2008-10-21 14:06:49 +0100 | [diff] [blame] | 71 | .pfn = __phys_to_pfn(S3C64XX_PA_SYSCON), |
| 72 | .length = SZ_4K, |
| 73 | .type = MT_DEVICE, |
| 74 | }, { |
| 75 | .virtual = (unsigned long)(S3C_VA_UART + UART_OFFS), |
| 76 | .pfn = __phys_to_pfn(S3C_PA_UART), |
| 77 | .length = SZ_4K, |
| 78 | .type = MT_DEVICE, |
| 79 | }, { |
Ben Dooks | f945ee1 | 2008-10-21 14:07:13 +0100 | [diff] [blame] | 80 | .virtual = (unsigned long)S3C_VA_VIC0, |
Ben Dooks | beda30f | 2008-10-21 14:06:49 +0100 | [diff] [blame] | 81 | .pfn = __phys_to_pfn(S3C64XX_PA_VIC0), |
| 82 | .length = SZ_16K, |
| 83 | .type = MT_DEVICE, |
| 84 | }, { |
Ben Dooks | f945ee1 | 2008-10-21 14:07:13 +0100 | [diff] [blame] | 85 | .virtual = (unsigned long)S3C_VA_VIC1, |
Ben Dooks | beda30f | 2008-10-21 14:06:49 +0100 | [diff] [blame] | 86 | .pfn = __phys_to_pfn(S3C64XX_PA_VIC1), |
| 87 | .length = SZ_16K, |
| 88 | .type = MT_DEVICE, |
Ben Dooks | f982dc5 | 2008-10-21 14:06:57 +0100 | [diff] [blame] | 89 | }, { |
Ben Dooks | f945ee1 | 2008-10-21 14:07:13 +0100 | [diff] [blame] | 90 | .virtual = (unsigned long)S3C_VA_TIMER, |
Ben Dooks | f982dc5 | 2008-10-21 14:06:57 +0100 | [diff] [blame] | 91 | .pfn = __phys_to_pfn(S3C_PA_TIMER), |
| 92 | .length = SZ_16K, |
| 93 | .type = MT_DEVICE, |
Ben Dooks | 94df868 | 2008-10-21 14:07:07 +0100 | [diff] [blame] | 94 | }, { |
Ben Dooks | f945ee1 | 2008-10-21 14:07:13 +0100 | [diff] [blame] | 95 | .virtual = (unsigned long)S3C64XX_VA_GPIO, |
Ben Dooks | 94df868 | 2008-10-21 14:07:07 +0100 | [diff] [blame] | 96 | .pfn = __phys_to_pfn(S3C64XX_PA_GPIO), |
| 97 | .length = SZ_4K, |
| 98 | .type = MT_DEVICE, |
Ben Dooks | beda30f | 2008-10-21 14:06:49 +0100 | [diff] [blame] | 99 | }, |
| 100 | }; |
| 101 | |
| 102 | /* read cpu identification code */ |
| 103 | |
Ben Dooks | beda30f | 2008-10-21 14:06:49 +0100 | [diff] [blame] | 104 | void __init s3c64xx_init_io(struct map_desc *mach_desc, int size) |
| 105 | { |
| 106 | unsigned long idcode; |
| 107 | |
| 108 | /* initialise the io descriptors we need for initialisation */ |
| 109 | iotable_init(s3c_iodesc, ARRAY_SIZE(s3c_iodesc)); |
| 110 | iotable_init(mach_desc, size); |
| 111 | |
| 112 | idcode = __raw_readl(S3C_VA_SYS + 0x118); |
| 113 | s3c_init_cpu(idcode, cpu_ids, ARRAY_SIZE(cpu_ids)); |
| 114 | } |