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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> | |
1deb507d | 19 | #include <linux/sysdev.h> |
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20 | #include <linux/serial_core.h> |
21 | #include <linux/platform_device.h> | |
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22 | #include <linux/io.h> |
23 | ||
24 | #include <mach/hardware.h> | |
25 | #include <mach/map.h> | |
26 | ||
27 | #include <asm/mach/arch.h> | |
28 | #include <asm/mach/map.h> | |
29 | ||
30 | #include <plat/regs-serial.h> | |
31 | ||
32 | #include <plat/cpu.h> | |
33 | #include <plat/devs.h> | |
34 | #include <plat/clock.h> | |
35 | ||
36 | #include <plat/s3c6400.h> | |
37 | #include <plat/s3c6410.h> | |
38 | ||
39 | /* table of supported CPUs */ | |
40 | ||
41 | static const char name_s3c6400[] = "S3C6400"; | |
42 | static const char name_s3c6410[] = "S3C6410"; | |
43 | ||
44 | static struct cpu_table cpu_ids[] __initdata = { | |
45 | { | |
46 | .idcode = 0x36400000, | |
47 | .idmask = 0xfffff000, | |
48 | .map_io = s3c6400_map_io, | |
49 | .init_clocks = s3c6400_init_clocks, | |
50 | .init_uarts = s3c6400_init_uarts, | |
51 | .init = s3c6400_init, | |
52 | .name = name_s3c6400, | |
53 | }, { | |
54 | .idcode = 0x36410100, | |
55 | .idmask = 0xffffff00, | |
56 | .map_io = s3c6410_map_io, | |
57 | .init_clocks = s3c6410_init_clocks, | |
58 | .init_uarts = s3c6410_init_uarts, | |
59 | .init = s3c6410_init, | |
60 | .name = name_s3c6410, | |
61 | }, | |
62 | }; | |
63 | ||
64 | /* minimal IO mapping */ | |
65 | ||
66 | /* see notes on uart map in arch/arm/mach-s3c6400/include/mach/debug-macro.S */ | |
67 | #define UART_OFFS (S3C_PA_UART & 0xfffff) | |
68 | ||
69 | static struct map_desc s3c_iodesc[] __initdata = { | |
70 | { | |
f945ee13 | 71 | .virtual = (unsigned long)S3C_VA_SYS, |
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72 | .pfn = __phys_to_pfn(S3C64XX_PA_SYSCON), |
73 | .length = SZ_4K, | |
74 | .type = MT_DEVICE, | |
75 | }, { | |
76 | .virtual = (unsigned long)(S3C_VA_UART + UART_OFFS), | |
77 | .pfn = __phys_to_pfn(S3C_PA_UART), | |
78 | .length = SZ_4K, | |
79 | .type = MT_DEVICE, | |
80 | }, { | |
f945ee13 | 81 | .virtual = (unsigned long)S3C_VA_VIC0, |
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82 | .pfn = __phys_to_pfn(S3C64XX_PA_VIC0), |
83 | .length = SZ_16K, | |
84 | .type = MT_DEVICE, | |
85 | }, { | |
f945ee13 | 86 | .virtual = (unsigned long)S3C_VA_VIC1, |
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87 | .pfn = __phys_to_pfn(S3C64XX_PA_VIC1), |
88 | .length = SZ_16K, | |
89 | .type = MT_DEVICE, | |
f982dc53 | 90 | }, { |
f945ee13 | 91 | .virtual = (unsigned long)S3C_VA_TIMER, |
f982dc53 BD |
92 | .pfn = __phys_to_pfn(S3C_PA_TIMER), |
93 | .length = SZ_16K, | |
94 | .type = MT_DEVICE, | |
94df868b | 95 | }, { |
f945ee13 | 96 | .virtual = (unsigned long)S3C64XX_VA_GPIO, |
94df868b BD |
97 | .pfn = __phys_to_pfn(S3C64XX_PA_GPIO), |
98 | .length = SZ_4K, | |
99 | .type = MT_DEVICE, | |
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100 | }, { |
101 | .virtual = (unsigned long)S3C64XX_VA_MODEM, | |
102 | .pfn = __phys_to_pfn(S3C64XX_PA_MODEM), | |
103 | .length = SZ_4K, | |
104 | .type = MT_DEVICE, | |
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105 | }, { |
106 | .virtual = (unsigned long)S3C_VA_WATCHDOG, | |
107 | .pfn = __phys_to_pfn(S3C64XX_PA_WATCHDOG), | |
108 | .length = SZ_4K, | |
109 | .type = MT_DEVICE, | |
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110 | }, |
111 | }; | |
112 | ||
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113 | |
114 | struct sysdev_class s3c64xx_sysclass = { | |
115 | .name = "s3c64xx-core", | |
116 | }; | |
117 | ||
118 | static struct sys_device s3c64xx_sysdev = { | |
119 | .cls = &s3c64xx_sysclass, | |
120 | }; | |
121 | ||
122 | ||
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123 | /* read cpu identification code */ |
124 | ||
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125 | void __init s3c64xx_init_io(struct map_desc *mach_desc, int size) |
126 | { | |
127 | unsigned long idcode; | |
128 | ||
129 | /* initialise the io descriptors we need for initialisation */ | |
130 | iotable_init(s3c_iodesc, ARRAY_SIZE(s3c_iodesc)); | |
131 | iotable_init(mach_desc, size); | |
132 | ||
133 | idcode = __raw_readl(S3C_VA_SYS + 0x118); | |
e074f980 BD |
134 | if (!idcode) { |
135 | /* S3C6400 has the ID register in a different place, | |
136 | * and needs a write before it can be read. */ | |
137 | ||
138 | __raw_writel(0x0, S3C_VA_SYS + 0xA1C); | |
139 | idcode = __raw_readl(S3C_VA_SYS + 0xA1C); | |
140 | } | |
141 | ||
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142 | s3c_init_cpu(idcode, cpu_ids, ARRAY_SIZE(cpu_ids)); |
143 | } | |
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144 | |
145 | static __init int s3c64xx_sysdev_init(void) | |
146 | { | |
147 | sysdev_class_register(&s3c64xx_sysclass); | |
148 | return sysdev_register(&s3c64xx_sysdev); | |
149 | } | |
150 | ||
151 | core_initcall(s3c64xx_sysdev_init); |