aboutsummaryrefslogtreecommitdiff
path: root/arch/arm/mach-s3c2410/s3c2410.c
blob: 183e4033ce617b07b9c5bff936d454e21292b47d (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
/* linux/arch/arm/mach-s3c2410/s3c2410.c
 *
 * Copyright (c) 2003-2005 Simtec Electronics
 *	Ben Dooks <ben@simtec.co.uk>
 *
 * http://www.simtec.co.uk/products/EB2410ITX/
 *
 * 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/kernel.h>
#include <linux/types.h>
#include <linux/interrupt.h>
#include <linux/list.h>
#include <linux/timer.h>
#include <linux/init.h>
#include <linux/sysdev.h>
#include <linux/platform_device.h>

#include <asm/mach/arch.h>
#include <asm/mach/map.h>
#include <asm/mach/irq.h>

#include <asm/hardware.h>
#include <asm/io.h>
#include <asm/irq.h>

#include <asm/arch/regs-clock.h>
#include <asm/arch/regs-serial.h>

#include "s3c2410.h"
#include "cpu.h"
#include "devs.h"
#include "clock.h"

/* Initial IO mappings */

static struct map_desc s3c2410_iodesc[] __initdata = {
	IODESC_ENT(USBHOST),
	IODESC_ENT(CLKPWR),
	IODESC_ENT(LCD),
	IODESC_ENT(TIMER),
	IODESC_ENT(ADC),
	IODESC_ENT(WATCHDOG),
};

/* our uart devices */

/* uart registration process */

void __init s3c2410_init_uarts(struct s3c2410_uartcfg *cfg, int no)
{
	s3c24xx_init_uartdevs("s3c2410-uart", s3c2410_uart_resources, cfg, no);
}

/* s3c2410_map_io
 *
 * register the standard cpu IO areas, and any passed in from the
 * machine specific initialisation.
*/

void __init s3c2410_map_io(struct map_desc *mach_desc, int mach_size)
{
	/* register our io-tables */

	iotable_init(s3c2410_iodesc, ARRAY_SIZE(s3c2410_iodesc));
	iotable_init(mach_desc, mach_size);
}

void __init s3c2410_init_clocks(int xtal)
{
	unsigned long tmp;
	unsigned long fclk;
	unsigned long hclk;
	unsigned long pclk;

	/* now we've got our machine bits initialised, work out what
	 * clocks we've got */

	fclk = s3c2410_get_pll(__raw_readl(S3C2410_MPLLCON), xtal);

	tmp = __raw_readl(S3C2410_CLKDIVN);

	/* work out clock scalings */

	hclk = fclk / ((tmp & S3C2410_CLKDIVN_HDIVN) ? 2 : 1);
	pclk = hclk / ((tmp & S3C2410_CLKDIVN_PDIVN) ? 2 : 1);

	/* print brieft summary of clocks, etc */

	printk("S3C2410: core %ld.%03ld MHz, memory %ld.%03ld MHz, peripheral %ld.%03ld MHz\n",
	       print_mhz(fclk), print_mhz(hclk), print_mhz(pclk));

	/* initialise the clocks here, to allow other things like the
	 * console to use them
	 */

	s3c24xx_setup_clocks(xtal, fclk, hclk, pclk);
	s3c2410_baseclk_add();
}

struct sysdev_class s3c2410_sysclass = {
	set_kset_name("s3c2410-core"),
};

static struct sys_device s3c2410_sysdev = {
	.cls		= &s3c2410_sysclass,
};

/* need to register class before we actually register the device, and
 * we also need to ensure that it has been initialised before any of the
 * drivers even try to use it (even if not on an s3c2440 based system)
 * as a driver which may support both 2410 and 2440 may try and use it.
*/

static int __init s3c2410_core_init(void)
{
	return sysdev_class_register(&s3c2410_sysclass);
}

core_initcall(s3c2410_core_init);

int __init s3c2410_init(void)
{
	printk("S3C2410: Initialising architecture\n");

	return sysdev_register(&s3c2410_sysdev);
}