Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* 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 Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 11 | */ |
| 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 Dooks | 1ec7269 | 2010-05-03 14:39:45 +0900 | [diff] [blame] | 19 | #include <linux/gpio.h> |
Ben Dooks | e425382 | 2008-10-21 14:06:38 +0100 | [diff] [blame] | 20 | #include <linux/clk.h> |
Kay Sievers | 4a858cf | 2011-12-21 16:01:38 -0800 | [diff] [blame] | 21 | #include <linux/device.h> |
Rafael J. Wysocki | bb072c3 | 2011-04-22 22:03:21 +0200 | [diff] [blame] | 22 | #include <linux/syscore_ops.h> |
Ben Dooks | b6d1f54 | 2006-12-17 23:22:26 +0100 | [diff] [blame] | 23 | #include <linux/serial_core.h> |
Tushar Behera | 334a1c7 | 2014-02-14 10:32:45 +0900 | [diff] [blame^] | 24 | #include <linux/serial_s3c.h> |
Russell King | d052d1b | 2005-10-29 19:07:23 +0100 | [diff] [blame] | 25 | #include <linux/platform_device.h> |
Robin Holt | 7b6d864 | 2013-07-08 16:01:40 -0700 | [diff] [blame] | 26 | #include <linux/reboot.h> |
Russell King | fced80c | 2008-09-06 12:10:45 +0100 | [diff] [blame] | 27 | #include <linux/io.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 28 | |
| 29 | #include <asm/mach/arch.h> |
| 30 | #include <asm/mach/map.h> |
| 31 | #include <asm/mach/irq.h> |
| 32 | |
Russell King | a09e64f | 2008-08-05 16:14:15 +0100 | [diff] [blame] | 33 | #include <mach/hardware.h> |
Linus Walleij | b0161ca | 2014-01-14 14:24:24 +0100 | [diff] [blame] | 34 | #include <mach/gpio-samsung.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 35 | #include <asm/irq.h> |
David Howells | 9f97da7 | 2012-03-28 18:30:01 +0100 | [diff] [blame] | 36 | #include <asm/system_misc.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 37 | |
Ben Dooks | e425382 | 2008-10-21 14:06:38 +0100 | [diff] [blame] | 38 | #include <plat/cpu-freq.h> |
| 39 | |
Russell King | a09e64f | 2008-08-05 16:14:15 +0100 | [diff] [blame] | 40 | #include <mach/regs-clock.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 41 | |
Ben Dooks | a2b7ba9 | 2008-10-07 22:26:09 +0100 | [diff] [blame] | 42 | #include <plat/cpu.h> |
| 43 | #include <plat/devs.h> |
Ben Dooks | d5120ae | 2008-10-07 23:09:51 +0100 | [diff] [blame] | 44 | #include <plat/clock.h> |
Ben Dooks | e24b864 | 2008-10-21 14:06:34 +0100 | [diff] [blame] | 45 | #include <plat/pll.h> |
Rafael J. Wysocki | bb072c3 | 2011-04-22 22:03:21 +0200 | [diff] [blame] | 46 | #include <plat/pm.h> |
Kukjin Kim | b27b072 | 2012-01-03 14:02:03 +0100 | [diff] [blame] | 47 | #include <plat/watchdog-reset.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 48 | |
Ben Dooks | 1ec7269 | 2010-05-03 14:39:45 +0900 | [diff] [blame] | 49 | #include <plat/gpio-core.h> |
| 50 | #include <plat/gpio-cfg.h> |
| 51 | #include <plat/gpio-cfg-helpers.h> |
| 52 | |
Heiko Stuebner | d8fdec1 | 2013-01-29 10:25:22 -0800 | [diff] [blame] | 53 | #include "common.h" |
| 54 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 55 | /* Initial IO mappings */ |
| 56 | |
| 57 | static struct map_desc s3c2410_iodesc[] __initdata = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 58 | IODESC_ENT(CLKPWR), |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 59 | IODESC_ENT(TIMER), |
Dimitry Andric | 62ee914 | 2005-08-17 13:01:19 +0100 | [diff] [blame] | 60 | IODESC_ENT(WATCHDOG), |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 61 | }; |
| 62 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 63 | /* our uart devices */ |
| 64 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 65 | /* uart registration process */ |
| 66 | |
| 67 | void __init s3c2410_init_uarts(struct s3c2410_uartcfg *cfg, int no) |
| 68 | { |
Ben Dooks | 66a9b49 | 2006-06-18 23:04:05 +0100 | [diff] [blame] | 69 | s3c24xx_init_uartdevs("s3c2410-uart", s3c2410_uart_resources, cfg, no); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 70 | } |
| 71 | |
| 72 | /* s3c2410_map_io |
| 73 | * |
| 74 | * register the standard cpu IO areas, and any passed in from the |
| 75 | * machine specific initialisation. |
| 76 | */ |
| 77 | |
Ben Dooks | 74b265d | 2008-10-21 14:06:31 +0100 | [diff] [blame] | 78 | void __init s3c2410_map_io(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 79 | { |
Kukjin Kim | 782d8a3 | 2011-08-30 20:47:32 +0900 | [diff] [blame] | 80 | s3c24xx_gpiocfg_default.set_pull = s3c24xx_gpio_setpull_1up; |
| 81 | s3c24xx_gpiocfg_default.get_pull = s3c24xx_gpio_getpull_1up; |
Ben Dooks | 1ec7269 | 2010-05-03 14:39:45 +0900 | [diff] [blame] | 82 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 83 | iotable_init(s3c2410_iodesc, ARRAY_SIZE(s3c2410_iodesc)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 84 | } |
| 85 | |
Ben Dooks | e425382 | 2008-10-21 14:06:38 +0100 | [diff] [blame] | 86 | void __init_or_cpufreq s3c2410_setup_clocks(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 87 | { |
Ben Dooks | e425382 | 2008-10-21 14:06:38 +0100 | [diff] [blame] | 88 | struct clk *xtal_clk; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 89 | unsigned long tmp; |
Ben Dooks | e425382 | 2008-10-21 14:06:38 +0100 | [diff] [blame] | 90 | unsigned long xtal; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 91 | unsigned long fclk; |
| 92 | unsigned long hclk; |
| 93 | unsigned long pclk; |
| 94 | |
Ben Dooks | e425382 | 2008-10-21 14:06:38 +0100 | [diff] [blame] | 95 | xtal_clk = clk_get(NULL, "xtal"); |
| 96 | xtal = clk_get_rate(xtal_clk); |
| 97 | clk_put(xtal_clk); |
| 98 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 99 | /* now we've got our machine bits initialised, work out what |
| 100 | * clocks we've got */ |
| 101 | |
Ben Dooks | e24b864 | 2008-10-21 14:06:34 +0100 | [diff] [blame] | 102 | fclk = s3c24xx_get_pll(__raw_readl(S3C2410_MPLLCON), xtal); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 103 | |
| 104 | tmp = __raw_readl(S3C2410_CLKDIVN); |
| 105 | |
| 106 | /* work out clock scalings */ |
| 107 | |
| 108 | hclk = fclk / ((tmp & S3C2410_CLKDIVN_HDIVN) ? 2 : 1); |
| 109 | pclk = hclk / ((tmp & S3C2410_CLKDIVN_PDIVN) ? 2 : 1); |
| 110 | |
| 111 | /* print brieft summary of clocks, etc */ |
| 112 | |
| 113 | printk("S3C2410: core %ld.%03ld MHz, memory %ld.%03ld MHz, peripheral %ld.%03ld MHz\n", |
| 114 | print_mhz(fclk), print_mhz(hclk), print_mhz(pclk)); |
| 115 | |
| 116 | /* initialise the clocks here, to allow other things like the |
| 117 | * console to use them |
| 118 | */ |
| 119 | |
Ben Dooks | e425382 | 2008-10-21 14:06:38 +0100 | [diff] [blame] | 120 | s3c24xx_setup_clocks(fclk, hclk, pclk); |
| 121 | } |
| 122 | |
Ben Dooks | ad78759 | 2009-07-30 23:23:40 +0100 | [diff] [blame] | 123 | /* fake ARMCLK for use with cpufreq, etc. */ |
| 124 | |
| 125 | static struct clk s3c2410_armclk = { |
| 126 | .name = "armclk", |
| 127 | .parent = &clk_f, |
| 128 | .id = -1, |
| 129 | }; |
| 130 | |
Thomas Abraham | 0cfb26e | 2011-10-24 12:08:42 +0200 | [diff] [blame] | 131 | static struct clk_lookup s3c2410_clk_lookup[] = { |
| 132 | CLKDEV_INIT(NULL, "clk_uart_baud0", &clk_p), |
| 133 | CLKDEV_INIT(NULL, "clk_uart_baud1", &s3c24xx_uclk), |
| 134 | }; |
| 135 | |
Ben Dooks | e425382 | 2008-10-21 14:06:38 +0100 | [diff] [blame] | 136 | void __init s3c2410_init_clocks(int xtal) |
| 137 | { |
| 138 | s3c24xx_register_baseclocks(xtal); |
| 139 | s3c2410_setup_clocks(); |
Ben Dooks | 99c1385 | 2006-06-22 22:18:20 +0100 | [diff] [blame] | 140 | s3c2410_baseclk_add(); |
Ben Dooks | ad78759 | 2009-07-30 23:23:40 +0100 | [diff] [blame] | 141 | s3c24xx_register_clock(&s3c2410_armclk); |
Thomas Abraham | 0cfb26e | 2011-10-24 12:08:42 +0200 | [diff] [blame] | 142 | clkdev_add_table(s3c2410_clk_lookup, ARRAY_SIZE(s3c2410_clk_lookup)); |
Tomasz Figa | 88f5973 | 2013-06-17 23:45:37 +0900 | [diff] [blame] | 143 | samsung_wdt_reset_init(S3C24XX_VA_WATCHDOG); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 144 | } |
| 145 | |
Kay Sievers | 4a858cf | 2011-12-21 16:01:38 -0800 | [diff] [blame] | 146 | struct bus_type s3c2410_subsys = { |
Kay Sievers | af5ca3f4 | 2007-12-20 02:09:39 +0100 | [diff] [blame] | 147 | .name = "s3c2410-core", |
Kay Sievers | 4a858cf | 2011-12-21 16:01:38 -0800 | [diff] [blame] | 148 | .dev_name = "s3c2410-core", |
Ben Dooks | a341305 | 2006-06-22 22:18:13 +0100 | [diff] [blame] | 149 | }; |
| 150 | |
Ben Dooks | f017679 | 2009-07-30 23:23:38 +0100 | [diff] [blame] | 151 | /* Note, we would have liked to name this s3c2410-core, but we cannot |
Kay Sievers | 4a858cf | 2011-12-21 16:01:38 -0800 | [diff] [blame] | 152 | * register two subsystems with the same name. |
Ben Dooks | f017679 | 2009-07-30 23:23:38 +0100 | [diff] [blame] | 153 | */ |
Kay Sievers | 4a858cf | 2011-12-21 16:01:38 -0800 | [diff] [blame] | 154 | struct bus_type s3c2410a_subsys = { |
Ben Dooks | f017679 | 2009-07-30 23:23:38 +0100 | [diff] [blame] | 155 | .name = "s3c2410a-core", |
Kay Sievers | 4a858cf | 2011-12-21 16:01:38 -0800 | [diff] [blame] | 156 | .dev_name = "s3c2410a-core", |
Ben Dooks | f017679 | 2009-07-30 23:23:38 +0100 | [diff] [blame] | 157 | }; |
| 158 | |
Kay Sievers | 4a858cf | 2011-12-21 16:01:38 -0800 | [diff] [blame] | 159 | static struct device s3c2410_dev = { |
| 160 | .bus = &s3c2410_subsys, |
Ben Dooks | a341305 | 2006-06-22 22:18:13 +0100 | [diff] [blame] | 161 | }; |
| 162 | |
Kay Sievers | 4a858cf | 2011-12-21 16:01:38 -0800 | [diff] [blame] | 163 | /* need to register the subsystem before we actually register the device, and |
Ben Dooks | a341305 | 2006-06-22 22:18:13 +0100 | [diff] [blame] | 164 | * we also need to ensure that it has been initialised before any of the |
Ben Dooks | 6db3eee | 2007-02-12 16:03:22 +0100 | [diff] [blame] | 165 | * drivers even try to use it (even if not on an s3c2410 based system) |
Ben Dooks | a341305 | 2006-06-22 22:18:13 +0100 | [diff] [blame] | 166 | * as a driver which may support both 2410 and 2440 may try and use it. |
| 167 | */ |
| 168 | |
| 169 | static int __init s3c2410_core_init(void) |
| 170 | { |
Kay Sievers | 4a858cf | 2011-12-21 16:01:38 -0800 | [diff] [blame] | 171 | return subsys_system_register(&s3c2410_subsys, NULL); |
Ben Dooks | a341305 | 2006-06-22 22:18:13 +0100 | [diff] [blame] | 172 | } |
| 173 | |
| 174 | core_initcall(s3c2410_core_init); |
| 175 | |
Ben Dooks | f017679 | 2009-07-30 23:23:38 +0100 | [diff] [blame] | 176 | static int __init s3c2410a_core_init(void) |
| 177 | { |
Kay Sievers | 4a858cf | 2011-12-21 16:01:38 -0800 | [diff] [blame] | 178 | return subsys_system_register(&s3c2410a_subsys, NULL); |
Ben Dooks | f017679 | 2009-07-30 23:23:38 +0100 | [diff] [blame] | 179 | } |
| 180 | |
| 181 | core_initcall(s3c2410a_core_init); |
| 182 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 183 | int __init s3c2410_init(void) |
| 184 | { |
| 185 | printk("S3C2410: Initialising architecture\n"); |
| 186 | |
Domenico Andreoli | fb630b9 | 2011-10-22 04:00:53 +0900 | [diff] [blame] | 187 | #ifdef CONFIG_PM |
Rafael J. Wysocki | bb072c3 | 2011-04-22 22:03:21 +0200 | [diff] [blame] | 188 | register_syscore_ops(&s3c2410_pm_syscore_ops); |
| 189 | register_syscore_ops(&s3c24xx_irq_syscore_ops); |
Heiko Stuebner | d8fdec1 | 2013-01-29 10:25:22 -0800 | [diff] [blame] | 190 | #endif |
Rafael J. Wysocki | bb072c3 | 2011-04-22 22:03:21 +0200 | [diff] [blame] | 191 | |
Kay Sievers | 4a858cf | 2011-12-21 16:01:38 -0800 | [diff] [blame] | 192 | return device_register(&s3c2410_dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 193 | } |
Ben Dooks | f017679 | 2009-07-30 23:23:38 +0100 | [diff] [blame] | 194 | |
| 195 | int __init s3c2410a_init(void) |
| 196 | { |
Kay Sievers | 4a858cf | 2011-12-21 16:01:38 -0800 | [diff] [blame] | 197 | s3c2410_dev.bus = &s3c2410a_subsys; |
Ben Dooks | f017679 | 2009-07-30 23:23:38 +0100 | [diff] [blame] | 198 | return s3c2410_init(); |
| 199 | } |
Kukjin Kim | b27b072 | 2012-01-03 14:02:03 +0100 | [diff] [blame] | 200 | |
Robin Holt | 7b6d864 | 2013-07-08 16:01:40 -0700 | [diff] [blame] | 201 | void s3c2410_restart(enum reboot_mode mode, const char *cmd) |
Kukjin Kim | b27b072 | 2012-01-03 14:02:03 +0100 | [diff] [blame] | 202 | { |
Robin Holt | 7b6d864 | 2013-07-08 16:01:40 -0700 | [diff] [blame] | 203 | if (mode == REBOOT_SOFT) { |
Kukjin Kim | b27b072 | 2012-01-03 14:02:03 +0100 | [diff] [blame] | 204 | soft_restart(0); |
| 205 | } |
| 206 | |
Tomasz Figa | 88f5973 | 2013-06-17 23:45:37 +0900 | [diff] [blame] | 207 | samsung_wdt_reset(); |
Kukjin Kim | b27b072 | 2012-01-03 14:02:03 +0100 | [diff] [blame] | 208 | |
| 209 | /* we'll take a jump through zero as a poor second */ |
| 210 | soft_restart(0); |
| 211 | } |