Merge branch 'master' of ssh://master.kernel.org/home/ftp/pub/scm/linux/kernel/git...
[linux-2.6] / arch / arm / plat-s3c64xx / cpu.c
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>
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         {
70                 .virtual        = (unsigned long)S3C_VA_SYS,
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         }, {
80                 .virtual        = (unsigned long)S3C_VA_VIC0,
81                 .pfn            = __phys_to_pfn(S3C64XX_PA_VIC0),
82                 .length         = SZ_16K,
83                 .type           = MT_DEVICE,
84         }, {
85                 .virtual        = (unsigned long)S3C_VA_VIC1,
86                 .pfn            = __phys_to_pfn(S3C64XX_PA_VIC1),
87                 .length         = SZ_16K,
88                 .type           = MT_DEVICE,
89         }, {
90                 .virtual        = (unsigned long)S3C_VA_TIMER,
91                 .pfn            = __phys_to_pfn(S3C_PA_TIMER),
92                 .length         = SZ_16K,
93                 .type           = MT_DEVICE,
94         }, {
95                 .virtual        = (unsigned long)S3C64XX_VA_GPIO,
96                 .pfn            = __phys_to_pfn(S3C64XX_PA_GPIO),
97                 .length         = SZ_4K,
98                 .type           = MT_DEVICE,
99         }, {
100                 .virtual        = (unsigned long)S3C64XX_VA_MODEM,
101                 .pfn            = __phys_to_pfn(S3C64XX_PA_MODEM),
102                 .length         = SZ_4K,
103                 .type           = MT_DEVICE,
104         },
105 };
106
107 /* read cpu identification code */
108
109 void __init s3c64xx_init_io(struct map_desc *mach_desc, int size)
110 {
111         unsigned long idcode;
112
113         /* initialise the io descriptors we need for initialisation */
114         iotable_init(s3c_iodesc, ARRAY_SIZE(s3c_iodesc));
115         iotable_init(mach_desc, size);
116
117         idcode = __raw_readl(S3C_VA_SYS + 0x118);
118         s3c_init_cpu(idcode, cpu_ids, ARRAY_SIZE(cpu_ids));
119 }