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gerrit-public.fairphone.software / kernel / msm-4.9 / 7534432dcc3c654a8671b6b0cdffd1dbdbc73074 / . / arch / arm / plat-s3c64xx / cpu.c
blob: fbde183a45606afc7194b4161f2052ef9bae4798 [file] [log] [blame]
Ben Dooksbeda30f2008-10-21 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 Dooksbeda30f2008-10-21 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
40static const char name_s3c6400[] = "S3C6400";
41static const char name_s3c6410[] = "S3C6410";
42
43static 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
68static struct map_desc s3c_iodesc[] __initdata = {
69 {
Ben Dooksf945ee12008-10-21 14:07:13 +0100[diff] [blame]70 .virtual = (unsigned long)S3C_VA_SYS,
Ben Dooksbeda30f2008-10-21 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 Dooksf945ee12008-10-21 14:07:13 +0100[diff] [blame]80 .virtual = (unsigned long)S3C_VA_VIC0,
Ben Dooksbeda30f2008-10-21 14:06:49 +0100[diff] [blame]81 .pfn = __phys_to_pfn(S3C64XX_PA_VIC0),
82 .length = SZ_16K,
83 .type = MT_DEVICE,
84 }, {
Ben Dooksf945ee12008-10-21 14:07:13 +0100[diff] [blame]85 .virtual = (unsigned long)S3C_VA_VIC1,
Ben Dooksbeda30f2008-10-21 14:06:49 +0100[diff] [blame]86 .pfn = __phys_to_pfn(S3C64XX_PA_VIC1),
87 .length = SZ_16K,
88 .type = MT_DEVICE,
Ben Dooksf982dc52008-10-21 14:06:57 +0100[diff] [blame]89 }, {
Ben Dooksf945ee12008-10-21 14:07:13 +0100[diff] [blame]90 .virtual = (unsigned long)S3C_VA_TIMER,
Ben Dooksf982dc52008-10-21 14:06:57 +0100[diff] [blame]91 .pfn = __phys_to_pfn(S3C_PA_TIMER),
92 .length = SZ_16K,
93 .type = MT_DEVICE,
Ben Dooks94df8682008-10-21 14:07:07 +0100[diff] [blame]94 }, {
Ben Dooksf945ee12008-10-21 14:07:13 +0100[diff] [blame]95 .virtual = (unsigned long)S3C64XX_VA_GPIO,
Ben Dooks94df8682008-10-21 14:07:07 +0100[diff] [blame]96 .pfn = __phys_to_pfn(S3C64XX_PA_GPIO),
97 .length = SZ_4K,
98 .type = MT_DEVICE,
Ben Dooksbeda30f2008-10-21 14:06:49 +0100[diff] [blame]99 },
100};
101
102/* read cpu identification code */
103
Ben Dooksbeda30f2008-10-21 14:06:49 +0100[diff] [blame]104void __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}