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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/* linux/arch/arm/mach-s3c2410/s3c2410.c
2 *
3 * Copyright (c) 2003-2005 Simtec Electronics
4 * Ben Dooks <ben@simtec.co.uk>
5 *
6 * http://www.simtec.co.uk/products/EB2410ITX/
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 as
10 * published by the Free Software Foundation.
Linus Torvalds1da177e2005-04-16 15:20:36 -070011*/
12
13#include <linux/kernel.h>
14#include <linux/types.h>
15#include <linux/interrupt.h>
16#include <linux/list.h>
17#include <linux/timer.h>
18#include <linux/init.h>
Ben Dooks1ec72692010-05-03 14:39:45 +090019#include <linux/gpio.h>
Ben Dookse4253822008-10-21 14:06:38 +010020#include <linux/clk.h>
Kay Sievers4a858cf2011-12-21 16:01:38 -080021#include <linux/device.h>
Rafael J. Wysockibb072c32011-04-22 22:03:21 +020022#include <linux/syscore_ops.h>
Ben Dooksb6d1f542006-12-17 23:22:26 +010023#include <linux/serial_core.h>
Russell Kingd052d1b2005-10-29 19:07:23 +010024#include <linux/platform_device.h>
Robin Holt7b6d8642013-07-08 16:01:40 -070025#include <linux/reboot.h>
Russell Kingfced80c2008-09-06 12:10:45 +010026#include <linux/io.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070027
28#include <asm/mach/arch.h>
29#include <asm/mach/map.h>
30#include <asm/mach/irq.h>
31
Russell Kinga09e64f2008-08-05 16:14:15 +010032#include <mach/hardware.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070033#include <asm/irq.h>
David Howells9f97da72012-03-28 18:30:01 +010034#include <asm/system_misc.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070035
Ben Dookse4253822008-10-21 14:06:38 +010036#include <plat/cpu-freq.h>
37
Russell Kinga09e64f2008-08-05 16:14:15 +010038#include <mach/regs-clock.h>
Ben Dooksa2b7ba92008-10-07 22:26:09 +010039#include <plat/regs-serial.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070040
Ben Dooksa2b7ba92008-10-07 22:26:09 +010041#include <plat/cpu.h>
42#include <plat/devs.h>
Ben Dooksd5120ae2008-10-07 23:09:51 +010043#include <plat/clock.h>
Ben Dookse24b8642008-10-21 14:06:34 +010044#include <plat/pll.h>
Rafael J. Wysockibb072c32011-04-22 22:03:21 +020045#include <plat/pm.h>
Kukjin Kimb27b0722012-01-03 14:02:03 +010046#include <plat/watchdog-reset.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070047
Ben Dooks1ec72692010-05-03 14:39:45 +090048#include <plat/gpio-core.h>
49#include <plat/gpio-cfg.h>
50#include <plat/gpio-cfg-helpers.h>
51
Heiko Stuebnerd8fdec12013-01-29 10:25:22 -080052#include "common.h"
53
Linus Torvalds1da177e2005-04-16 15:20:36 -070054/* Initial IO mappings */
55
56static struct map_desc s3c2410_iodesc[] __initdata = {
Linus Torvalds1da177e2005-04-16 15:20:36 -070057 IODESC_ENT(CLKPWR),
Linus Torvalds1da177e2005-04-16 15:20:36 -070058 IODESC_ENT(TIMER),
Dimitry Andric62ee9142005-08-17 13:01:19 +010059 IODESC_ENT(WATCHDOG),
Linus Torvalds1da177e2005-04-16 15:20:36 -070060};
61
Linus Torvalds1da177e2005-04-16 15:20:36 -070062/* our uart devices */
63
Linus Torvalds1da177e2005-04-16 15:20:36 -070064/* uart registration process */
65
66void __init s3c2410_init_uarts(struct s3c2410_uartcfg *cfg, int no)
67{
Ben Dooks66a9b492006-06-18 23:04:05 +010068 s3c24xx_init_uartdevs("s3c2410-uart", s3c2410_uart_resources, cfg, no);
Linus Torvalds1da177e2005-04-16 15:20:36 -070069}
70
71/* s3c2410_map_io
72 *
73 * register the standard cpu IO areas, and any passed in from the
74 * machine specific initialisation.
75*/
76
Ben Dooks74b265d2008-10-21 14:06:31 +010077void __init s3c2410_map_io(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -070078{
Kukjin Kim782d8a32011-08-30 20:47:32 +090079 s3c24xx_gpiocfg_default.set_pull = s3c24xx_gpio_setpull_1up;
80 s3c24xx_gpiocfg_default.get_pull = s3c24xx_gpio_getpull_1up;
Ben Dooks1ec72692010-05-03 14:39:45 +090081
Linus Torvalds1da177e2005-04-16 15:20:36 -070082 iotable_init(s3c2410_iodesc, ARRAY_SIZE(s3c2410_iodesc));
Linus Torvalds1da177e2005-04-16 15:20:36 -070083}
84
Ben Dookse4253822008-10-21 14:06:38 +010085void __init_or_cpufreq s3c2410_setup_clocks(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -070086{
Ben Dookse4253822008-10-21 14:06:38 +010087 struct clk *xtal_clk;
Linus Torvalds1da177e2005-04-16 15:20:36 -070088 unsigned long tmp;
Ben Dookse4253822008-10-21 14:06:38 +010089 unsigned long xtal;
Linus Torvalds1da177e2005-04-16 15:20:36 -070090 unsigned long fclk;
91 unsigned long hclk;
92 unsigned long pclk;
93
Ben Dookse4253822008-10-21 14:06:38 +010094 xtal_clk = clk_get(NULL, "xtal");
95 xtal = clk_get_rate(xtal_clk);
96 clk_put(xtal_clk);
97
Linus Torvalds1da177e2005-04-16 15:20:36 -070098 /* now we've got our machine bits initialised, work out what
99 * clocks we've got */
100
Ben Dookse24b8642008-10-21 14:06:34 +0100101 fclk = s3c24xx_get_pll(__raw_readl(S3C2410_MPLLCON), xtal);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700102
103 tmp = __raw_readl(S3C2410_CLKDIVN);
104
105 /* work out clock scalings */
106
107 hclk = fclk / ((tmp & S3C2410_CLKDIVN_HDIVN) ? 2 : 1);
108 pclk = hclk / ((tmp & S3C2410_CLKDIVN_PDIVN) ? 2 : 1);
109
110 /* print brieft summary of clocks, etc */
111
112 printk("S3C2410: core %ld.%03ld MHz, memory %ld.%03ld MHz, peripheral %ld.%03ld MHz\n",
113 print_mhz(fclk), print_mhz(hclk), print_mhz(pclk));
114
115 /* initialise the clocks here, to allow other things like the
116 * console to use them
117 */
118
Ben Dookse4253822008-10-21 14:06:38 +0100119 s3c24xx_setup_clocks(fclk, hclk, pclk);
120}
121
Ben Dooksad787592009-07-30 23:23:40 +0100122/* fake ARMCLK for use with cpufreq, etc. */
123
124static struct clk s3c2410_armclk = {
125 .name = "armclk",
126 .parent = &clk_f,
127 .id = -1,
128};
129
Thomas Abraham0cfb26e2011-10-24 12:08:42 +0200130static struct clk_lookup s3c2410_clk_lookup[] = {
131 CLKDEV_INIT(NULL, "clk_uart_baud0", &clk_p),
132 CLKDEV_INIT(NULL, "clk_uart_baud1", &s3c24xx_uclk),
133};
134
Ben Dookse4253822008-10-21 14:06:38 +0100135void __init s3c2410_init_clocks(int xtal)
136{
137 s3c24xx_register_baseclocks(xtal);
138 s3c2410_setup_clocks();
Ben Dooks99c13852006-06-22 22:18:20 +0100139 s3c2410_baseclk_add();
Ben Dooksad787592009-07-30 23:23:40 +0100140 s3c24xx_register_clock(&s3c2410_armclk);
Thomas Abraham0cfb26e2011-10-24 12:08:42 +0200141 clkdev_add_table(s3c2410_clk_lookup, ARRAY_SIZE(s3c2410_clk_lookup));
Tomasz Figa88f59732013-06-17 23:45:37 +0900142 samsung_wdt_reset_init(S3C24XX_VA_WATCHDOG);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700143}
144
Kay Sievers4a858cf2011-12-21 16:01:38 -0800145struct bus_type s3c2410_subsys = {
Kay Sieversaf5ca3f2007-12-20 02:09:39 +0100146 .name = "s3c2410-core",
Kay Sievers4a858cf2011-12-21 16:01:38 -0800147 .dev_name = "s3c2410-core",
Ben Dooksa3413052006-06-22 22:18:13 +0100148};
149
Ben Dooksf0176792009-07-30 23:23:38 +0100150/* Note, we would have liked to name this s3c2410-core, but we cannot
Kay Sievers4a858cf2011-12-21 16:01:38 -0800151 * register two subsystems with the same name.
Ben Dooksf0176792009-07-30 23:23:38 +0100152 */
Kay Sievers4a858cf2011-12-21 16:01:38 -0800153struct bus_type s3c2410a_subsys = {
Ben Dooksf0176792009-07-30 23:23:38 +0100154 .name = "s3c2410a-core",
Kay Sievers4a858cf2011-12-21 16:01:38 -0800155 .dev_name = "s3c2410a-core",
Ben Dooksf0176792009-07-30 23:23:38 +0100156};
157
Kay Sievers4a858cf2011-12-21 16:01:38 -0800158static struct device s3c2410_dev = {
159 .bus = &s3c2410_subsys,
Ben Dooksa3413052006-06-22 22:18:13 +0100160};
161
Kay Sievers4a858cf2011-12-21 16:01:38 -0800162/* need to register the subsystem before we actually register the device, and
Ben Dooksa3413052006-06-22 22:18:13 +0100163 * we also need to ensure that it has been initialised before any of the
Ben Dooks6db3eee2007-02-12 16:03:22 +0100164 * drivers even try to use it (even if not on an s3c2410 based system)
Ben Dooksa3413052006-06-22 22:18:13 +0100165 * as a driver which may support both 2410 and 2440 may try and use it.
166*/
167
168static int __init s3c2410_core_init(void)
169{
Kay Sievers4a858cf2011-12-21 16:01:38 -0800170 return subsys_system_register(&s3c2410_subsys, NULL);
Ben Dooksa3413052006-06-22 22:18:13 +0100171}
172
173core_initcall(s3c2410_core_init);
174
Ben Dooksf0176792009-07-30 23:23:38 +0100175static int __init s3c2410a_core_init(void)
176{
Kay Sievers4a858cf2011-12-21 16:01:38 -0800177 return subsys_system_register(&s3c2410a_subsys, NULL);
Ben Dooksf0176792009-07-30 23:23:38 +0100178}
179
180core_initcall(s3c2410a_core_init);
181
Linus Torvalds1da177e2005-04-16 15:20:36 -0700182int __init s3c2410_init(void)
183{
184 printk("S3C2410: Initialising architecture\n");
185
Domenico Andreolifb630b92011-10-22 04:00:53 +0900186#ifdef CONFIG_PM
Rafael J. Wysockibb072c32011-04-22 22:03:21 +0200187 register_syscore_ops(&s3c2410_pm_syscore_ops);
188 register_syscore_ops(&s3c24xx_irq_syscore_ops);
Heiko Stuebnerd8fdec12013-01-29 10:25:22 -0800189#endif
Rafael J. Wysockibb072c32011-04-22 22:03:21 +0200190
Kay Sievers4a858cf2011-12-21 16:01:38 -0800191 return device_register(&s3c2410_dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700192}
Ben Dooksf0176792009-07-30 23:23:38 +0100193
194int __init s3c2410a_init(void)
195{
Kay Sievers4a858cf2011-12-21 16:01:38 -0800196 s3c2410_dev.bus = &s3c2410a_subsys;
Ben Dooksf0176792009-07-30 23:23:38 +0100197 return s3c2410_init();
198}
Kukjin Kimb27b0722012-01-03 14:02:03 +0100199
Robin Holt7b6d8642013-07-08 16:01:40 -0700200void s3c2410_restart(enum reboot_mode mode, const char *cmd)
Kukjin Kimb27b0722012-01-03 14:02:03 +0100201{
Robin Holt7b6d8642013-07-08 16:01:40 -0700202 if (mode == REBOOT_SOFT) {
Kukjin Kimb27b0722012-01-03 14:02:03 +0100203 soft_restart(0);
204 }
205
Tomasz Figa88f59732013-06-17 23:45:37 +0900206 samsung_wdt_reset();
Kukjin Kimb27b0722012-01-03 14:02:03 +0100207
208 /* we'll take a jump through zero as a poor second */
209 soft_restart(0);
210}