aboutsummaryrefslogtreecommitdiff
path: root/arch/arm/plat-s3c64xx/cpu.c
blob: 49796d2db86d5d6fb239f7f0c86a5400f1e9cf95 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
/* 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_UART + UART_OFFS),
		.pfn		= __phys_to_pfn(S3C_PA_UART),
		.length		= SZ_4K,
		.type		= MT_DEVICE,
	}, {
		.virtual	= (unsigned long)S3C_VA_VIC0,
		.pfn		= __phys_to_pfn(S3C64XX_PA_VIC0),
		.length		= SZ_16K,
		.type		= MT_DEVICE,
	}, {
		.virtual	= (unsigned long)S3C_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);