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> |
Ben Dooks | a341305 | 2006-06-22 22:18:13 +0100 | [diff] [blame] | 21 | #include <linux/sysdev.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> |
Russell King | d052d1b | 2005-10-29 19:07:23 +0100 | [diff] [blame] | 24 | #include <linux/platform_device.h> |
Russell King | fced80c | 2008-09-06 12:10:45 +0100 | [diff] [blame] | 25 | #include <linux/io.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 26 | |
| 27 | #include <asm/mach/arch.h> |
| 28 | #include <asm/mach/map.h> |
| 29 | #include <asm/mach/irq.h> |
| 30 | |
Russell King | a09e64f | 2008-08-05 16:14:15 +0100 | [diff] [blame] | 31 | #include <mach/hardware.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 32 | #include <asm/irq.h> |
| 33 | |
Ben Dooks | e425382 | 2008-10-21 14:06:38 +0100 | [diff] [blame] | 34 | #include <plat/cpu-freq.h> |
| 35 | |
Russell King | a09e64f | 2008-08-05 16:14:15 +0100 | [diff] [blame] | 36 | #include <mach/regs-clock.h> |
Ben Dooks | a2b7ba9 | 2008-10-07 22:26:09 +0100 | [diff] [blame] | 37 | #include <plat/regs-serial.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 38 | |
Ben Dooks | a2b7ba9 | 2008-10-07 22:26:09 +0100 | [diff] [blame] | 39 | #include <plat/s3c2410.h> |
| 40 | #include <plat/cpu.h> |
| 41 | #include <plat/devs.h> |
Ben Dooks | d5120ae | 2008-10-07 23:09:51 +0100 | [diff] [blame] | 42 | #include <plat/clock.h> |
Ben Dooks | e24b864 | 2008-10-21 14:06:34 +0100 | [diff] [blame] | 43 | #include <plat/pll.h> |
Rafael J. Wysocki | bb072c3 | 2011-04-22 22:03:21 +0200 | [diff] [blame] | 44 | #include <plat/pm.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 45 | |
Ben Dooks | 1ec7269 | 2010-05-03 14:39:45 +0900 | [diff] [blame] | 46 | #include <plat/gpio-core.h> |
| 47 | #include <plat/gpio-cfg.h> |
| 48 | #include <plat/gpio-cfg-helpers.h> |
| 49 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 50 | /* Initial IO mappings */ |
| 51 | |
| 52 | static struct map_desc s3c2410_iodesc[] __initdata = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 53 | IODESC_ENT(CLKPWR), |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 54 | IODESC_ENT(TIMER), |
Dimitry Andric | 62ee914 | 2005-08-17 13:01:19 +0100 | [diff] [blame] | 55 | IODESC_ENT(WATCHDOG), |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 56 | }; |
| 57 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 58 | /* our uart devices */ |
| 59 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 60 | /* uart registration process */ |
| 61 | |
| 62 | void __init s3c2410_init_uarts(struct s3c2410_uartcfg *cfg, int no) |
| 63 | { |
Ben Dooks | 66a9b49 | 2006-06-18 23:04:05 +0100 | [diff] [blame] | 64 | s3c24xx_init_uartdevs("s3c2410-uart", s3c2410_uart_resources, cfg, no); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 65 | } |
| 66 | |
| 67 | /* s3c2410_map_io |
| 68 | * |
| 69 | * register the standard cpu IO areas, and any passed in from the |
| 70 | * machine specific initialisation. |
| 71 | */ |
| 72 | |
Ben Dooks | 74b265d | 2008-10-21 14:06:31 +0100 | [diff] [blame] | 73 | void __init s3c2410_map_io(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 74 | { |
Ben Dooks | 1ec7269 | 2010-05-03 14:39:45 +0900 | [diff] [blame] | 75 | s3c24xx_gpiocfg_default.set_pull = s3c_gpio_setpull_1up; |
| 76 | s3c24xx_gpiocfg_default.get_pull = s3c_gpio_getpull_1up; |
| 77 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 78 | iotable_init(s3c2410_iodesc, ARRAY_SIZE(s3c2410_iodesc)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 79 | } |
| 80 | |
Ben Dooks | e425382 | 2008-10-21 14:06:38 +0100 | [diff] [blame] | 81 | void __init_or_cpufreq s3c2410_setup_clocks(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 82 | { |
Ben Dooks | e425382 | 2008-10-21 14:06:38 +0100 | [diff] [blame] | 83 | struct clk *xtal_clk; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 84 | unsigned long tmp; |
Ben Dooks | e425382 | 2008-10-21 14:06:38 +0100 | [diff] [blame] | 85 | unsigned long xtal; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 86 | unsigned long fclk; |
| 87 | unsigned long hclk; |
| 88 | unsigned long pclk; |
| 89 | |
Ben Dooks | e425382 | 2008-10-21 14:06:38 +0100 | [diff] [blame] | 90 | xtal_clk = clk_get(NULL, "xtal"); |
| 91 | xtal = clk_get_rate(xtal_clk); |
| 92 | clk_put(xtal_clk); |
| 93 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 94 | /* now we've got our machine bits initialised, work out what |
| 95 | * clocks we've got */ |
| 96 | |
Ben Dooks | e24b864 | 2008-10-21 14:06:34 +0100 | [diff] [blame] | 97 | fclk = s3c24xx_get_pll(__raw_readl(S3C2410_MPLLCON), xtal); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 98 | |
| 99 | tmp = __raw_readl(S3C2410_CLKDIVN); |
| 100 | |
| 101 | /* work out clock scalings */ |
| 102 | |
| 103 | hclk = fclk / ((tmp & S3C2410_CLKDIVN_HDIVN) ? 2 : 1); |
| 104 | pclk = hclk / ((tmp & S3C2410_CLKDIVN_PDIVN) ? 2 : 1); |
| 105 | |
| 106 | /* print brieft summary of clocks, etc */ |
| 107 | |
| 108 | printk("S3C2410: core %ld.%03ld MHz, memory %ld.%03ld MHz, peripheral %ld.%03ld MHz\n", |
| 109 | print_mhz(fclk), print_mhz(hclk), print_mhz(pclk)); |
| 110 | |
| 111 | /* initialise the clocks here, to allow other things like the |
| 112 | * console to use them |
| 113 | */ |
| 114 | |
Ben Dooks | e425382 | 2008-10-21 14:06:38 +0100 | [diff] [blame] | 115 | s3c24xx_setup_clocks(fclk, hclk, pclk); |
| 116 | } |
| 117 | |
Ben Dooks | ad78759 | 2009-07-30 23:23:40 +0100 | [diff] [blame] | 118 | /* fake ARMCLK for use with cpufreq, etc. */ |
| 119 | |
| 120 | static struct clk s3c2410_armclk = { |
| 121 | .name = "armclk", |
| 122 | .parent = &clk_f, |
| 123 | .id = -1, |
| 124 | }; |
| 125 | |
Ben Dooks | e425382 | 2008-10-21 14:06:38 +0100 | [diff] [blame] | 126 | void __init s3c2410_init_clocks(int xtal) |
| 127 | { |
| 128 | s3c24xx_register_baseclocks(xtal); |
| 129 | s3c2410_setup_clocks(); |
Ben Dooks | 99c1385 | 2006-06-22 22:18:20 +0100 | [diff] [blame] | 130 | s3c2410_baseclk_add(); |
Ben Dooks | ad78759 | 2009-07-30 23:23:40 +0100 | [diff] [blame] | 131 | s3c24xx_register_clock(&s3c2410_armclk); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 132 | } |
| 133 | |
Ben Dooks | a341305 | 2006-06-22 22:18:13 +0100 | [diff] [blame] | 134 | struct sysdev_class s3c2410_sysclass = { |
Kay Sievers | af5ca3f | 2007-12-20 02:09:39 +0100 | [diff] [blame] | 135 | .name = "s3c2410-core", |
Ben Dooks | a341305 | 2006-06-22 22:18:13 +0100 | [diff] [blame] | 136 | }; |
| 137 | |
Ben Dooks | f017679 | 2009-07-30 23:23:38 +0100 | [diff] [blame] | 138 | /* Note, we would have liked to name this s3c2410-core, but we cannot |
| 139 | * register two sysdev_class with the same name. |
| 140 | */ |
| 141 | struct sysdev_class s3c2410a_sysclass = { |
| 142 | .name = "s3c2410a-core", |
| 143 | }; |
| 144 | |
Ben Dooks | a341305 | 2006-06-22 22:18:13 +0100 | [diff] [blame] | 145 | static struct sys_device s3c2410_sysdev = { |
| 146 | .cls = &s3c2410_sysclass, |
| 147 | }; |
| 148 | |
| 149 | /* need to register class before we actually register the device, and |
| 150 | * 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] | 151 | * 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] | 152 | * as a driver which may support both 2410 and 2440 may try and use it. |
| 153 | */ |
| 154 | |
| 155 | static int __init s3c2410_core_init(void) |
| 156 | { |
| 157 | return sysdev_class_register(&s3c2410_sysclass); |
| 158 | } |
| 159 | |
| 160 | core_initcall(s3c2410_core_init); |
| 161 | |
Ben Dooks | f017679 | 2009-07-30 23:23:38 +0100 | [diff] [blame] | 162 | static int __init s3c2410a_core_init(void) |
| 163 | { |
| 164 | return sysdev_class_register(&s3c2410a_sysclass); |
| 165 | } |
| 166 | |
| 167 | core_initcall(s3c2410a_core_init); |
| 168 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 169 | int __init s3c2410_init(void) |
| 170 | { |
| 171 | printk("S3C2410: Initialising architecture\n"); |
| 172 | |
Rafael J. Wysocki | bb072c3 | 2011-04-22 22:03:21 +0200 | [diff] [blame] | 173 | register_syscore_ops(&s3c2410_pm_syscore_ops); |
| 174 | register_syscore_ops(&s3c24xx_irq_syscore_ops); |
| 175 | |
Ben Dooks | a341305 | 2006-06-22 22:18:13 +0100 | [diff] [blame] | 176 | return sysdev_register(&s3c2410_sysdev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 177 | } |
Ben Dooks | f017679 | 2009-07-30 23:23:38 +0100 | [diff] [blame] | 178 | |
| 179 | int __init s3c2410a_init(void) |
| 180 | { |
| 181 | s3c2410_sysdev.cls = &s3c2410a_sysclass; |
| 182 | return s3c2410_init(); |
| 183 | } |