Ben Dooks | 68d9ab3 | 2006-06-24 21:21:27 +0100 | [diff] [blame] | 1 | /* linux/arch/arm/mach-s3c2410/s3c2412.c |
| 2 | * |
| 3 | * Copyright (c) 2006 Simtec Electronics |
| 4 | * Ben Dooks <ben@simtec.co.uk> |
| 5 | * |
| 6 | * http://armlinux.simtec.co.uk/. |
| 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. |
Ben Dooks | 68d9ab3 | 2006-06-24 21:21:27 +0100 | [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> |
| 19 | #include <linux/sysdev.h> |
| 20 | #include <linux/platform_device.h> |
| 21 | |
| 22 | #include <asm/mach/arch.h> |
| 23 | #include <asm/mach/map.h> |
| 24 | #include <asm/mach/irq.h> |
| 25 | |
| 26 | #include <asm/hardware.h> |
Ben Dooks | c84cbb2 | 2006-09-14 13:29:15 +0100 | [diff] [blame] | 27 | #include <asm/proc-fns.h> |
Ben Dooks | 68d9ab3 | 2006-06-24 21:21:27 +0100 | [diff] [blame] | 28 | #include <asm/io.h> |
| 29 | #include <asm/irq.h> |
| 30 | |
Ben Dooks | c84cbb2 | 2006-09-14 13:29:15 +0100 | [diff] [blame] | 31 | #include <asm/arch/idle.h> |
| 32 | |
Ben Dooks | 68d9ab3 | 2006-06-24 21:21:27 +0100 | [diff] [blame] | 33 | #include <asm/arch/regs-clock.h> |
| 34 | #include <asm/arch/regs-serial.h> |
Ben Dooks | c84cbb2 | 2006-09-14 13:29:15 +0100 | [diff] [blame] | 35 | #include <asm/arch/regs-power.h> |
Ben Dooks | 68d9ab3 | 2006-06-24 21:21:27 +0100 | [diff] [blame] | 36 | #include <asm/arch/regs-gpio.h> |
| 37 | #include <asm/arch/regs-gpioj.h> |
| 38 | #include <asm/arch/regs-dsc.h> |
| 39 | |
| 40 | #include "s3c2412.h" |
| 41 | #include "cpu.h" |
| 42 | #include "devs.h" |
| 43 | #include "clock.h" |
| 44 | #include "pm.h" |
| 45 | |
| 46 | #ifndef CONFIG_CPU_S3C2412_ONLY |
| 47 | void __iomem *s3c24xx_va_gpio2 = S3C24XX_VA_GPIO; |
Ben Dooks | 50dedf1 | 2006-09-18 10:19:06 +0100 | [diff] [blame] | 48 | |
| 49 | static inline void s3c2412_init_gpio2(void) |
| 50 | { |
| 51 | s3c24xx_va_gpio2 = S3C24XX_VA_GPIO + 0x10; |
| 52 | } |
| 53 | #else |
| 54 | #define s3c2412_init_gpio2() do { } while(0) |
Ben Dooks | 68d9ab3 | 2006-06-24 21:21:27 +0100 | [diff] [blame] | 55 | #endif |
| 56 | |
| 57 | /* Initial IO mappings */ |
| 58 | |
| 59 | static struct map_desc s3c2412_iodesc[] __initdata = { |
| 60 | IODESC_ENT(CLKPWR), |
| 61 | IODESC_ENT(LCD), |
| 62 | IODESC_ENT(TIMER), |
Ben Dooks | 68d9ab3 | 2006-06-24 21:21:27 +0100 | [diff] [blame] | 63 | IODESC_ENT(WATCHDOG), |
| 64 | }; |
| 65 | |
| 66 | /* uart registration process */ |
| 67 | |
| 68 | void __init s3c2412_init_uarts(struct s3c2410_uartcfg *cfg, int no) |
| 69 | { |
| 70 | s3c24xx_init_uartdevs("s3c2412-uart", s3c2410_uart_resources, cfg, no); |
| 71 | |
| 72 | /* rename devices that are s3c2412/s3c2413 specific */ |
| 73 | s3c_device_sdi.name = "s3c2412-sdi"; |
Ben Dooks | 72d70d0 | 2006-09-20 20:46:09 +0100 | [diff] [blame] | 74 | s3c_device_lcd.name = "s3c2412-lcd"; |
Ben Dooks | 68d9ab3 | 2006-06-24 21:21:27 +0100 | [diff] [blame] | 75 | s3c_device_nand.name = "s3c2412-nand"; |
| 76 | } |
| 77 | |
Ben Dooks | c84cbb2 | 2006-09-14 13:29:15 +0100 | [diff] [blame] | 78 | /* s3c2412_idle |
| 79 | * |
| 80 | * use the standard idle call by ensuring the idle mode |
| 81 | * in power config, then issuing the idle co-processor |
| 82 | * instruction |
| 83 | */ |
| 84 | |
| 85 | static void s3c2412_idle(void) |
| 86 | { |
| 87 | unsigned long tmp; |
| 88 | |
| 89 | /* ensure our idle mode is to go to idle */ |
| 90 | |
| 91 | tmp = __raw_readl(S3C2412_PWRCFG); |
| 92 | tmp &= ~S3C2412_PWRCFG_STANDBYWFI_MASK; |
| 93 | tmp |= S3C2412_PWRCFG_STANDBYWFI_IDLE; |
| 94 | __raw_writel(tmp, S3C2412_PWRCFG); |
| 95 | |
| 96 | cpu_do_idle(); |
| 97 | } |
| 98 | |
Ben Dooks | 68d9ab3 | 2006-06-24 21:21:27 +0100 | [diff] [blame] | 99 | /* s3c2412_map_io |
| 100 | * |
| 101 | * register the standard cpu IO areas, and any passed in from the |
| 102 | * machine specific initialisation. |
| 103 | */ |
| 104 | |
| 105 | void __init s3c2412_map_io(struct map_desc *mach_desc, int mach_size) |
| 106 | { |
| 107 | /* move base of IO */ |
| 108 | |
Ben Dooks | 50dedf1 | 2006-09-18 10:19:06 +0100 | [diff] [blame] | 109 | s3c2412_init_gpio2(); |
Ben Dooks | 68d9ab3 | 2006-06-24 21:21:27 +0100 | [diff] [blame] | 110 | |
Ben Dooks | c84cbb2 | 2006-09-14 13:29:15 +0100 | [diff] [blame] | 111 | /* set our idle function */ |
| 112 | |
| 113 | s3c24xx_idle = s3c2412_idle; |
| 114 | |
Ben Dooks | 68d9ab3 | 2006-06-24 21:21:27 +0100 | [diff] [blame] | 115 | /* register our io-tables */ |
| 116 | |
| 117 | iotable_init(s3c2412_iodesc, ARRAY_SIZE(s3c2412_iodesc)); |
| 118 | iotable_init(mach_desc, mach_size); |
| 119 | } |
| 120 | |
| 121 | void __init s3c2412_init_clocks(int xtal) |
| 122 | { |
| 123 | unsigned long tmp; |
| 124 | unsigned long fclk; |
| 125 | unsigned long hclk; |
| 126 | unsigned long pclk; |
| 127 | |
| 128 | /* now we've got our machine bits initialised, work out what |
| 129 | * clocks we've got */ |
| 130 | |
| 131 | fclk = s3c2410_get_pll(__raw_readl(S3C2410_MPLLCON), xtal*2); |
| 132 | |
| 133 | tmp = __raw_readl(S3C2410_CLKDIVN); |
| 134 | |
| 135 | /* work out clock scalings */ |
| 136 | |
| 137 | hclk = fclk / ((tmp & S3C2412_CLKDIVN_HDIVN_MASK) + 1); |
| 138 | hclk /= ((tmp & S3C2421_CLKDIVN_ARMDIVN) ? 2 : 1); |
| 139 | pclk = hclk / ((tmp & S3C2412_CLKDIVN_PDIVN) ? 2 : 1); |
| 140 | |
| 141 | /* print brieft summary of clocks, etc */ |
| 142 | |
| 143 | printk("S3C2412: core %ld.%03ld MHz, memory %ld.%03ld MHz, peripheral %ld.%03ld MHz\n", |
| 144 | print_mhz(fclk), print_mhz(hclk), print_mhz(pclk)); |
| 145 | |
| 146 | /* initialise the clocks here, to allow other things like the |
| 147 | * console to use them |
| 148 | */ |
| 149 | |
| 150 | s3c24xx_setup_clocks(xtal, fclk, hclk, pclk); |
| 151 | s3c2412_baseclk_add(); |
| 152 | } |
| 153 | |
| 154 | /* need to register class before we actually register the device, and |
| 155 | * we also need to ensure that it has been initialised before any of the |
| 156 | * drivers even try to use it (even if not on an s3c2412 based system) |
| 157 | * as a driver which may support both 2410 and 2440 may try and use it. |
| 158 | */ |
| 159 | |
Ben Dooks | 68d9ab3 | 2006-06-24 21:21:27 +0100 | [diff] [blame] | 160 | struct sysdev_class s3c2412_sysclass = { |
| 161 | set_kset_name("s3c2412-core"), |
Ben Dooks | 68d9ab3 | 2006-06-24 21:21:27 +0100 | [diff] [blame] | 162 | }; |
| 163 | |
| 164 | static int __init s3c2412_core_init(void) |
| 165 | { |
| 166 | return sysdev_class_register(&s3c2412_sysclass); |
| 167 | } |
| 168 | |
| 169 | core_initcall(s3c2412_core_init); |
| 170 | |
| 171 | static struct sys_device s3c2412_sysdev = { |
| 172 | .cls = &s3c2412_sysclass, |
| 173 | }; |
| 174 | |
| 175 | int __init s3c2412_init(void) |
| 176 | { |
| 177 | printk("S3C2412: Initialising architecture\n"); |
| 178 | |
| 179 | return sysdev_register(&s3c2412_sysdev); |
| 180 | } |