arch/arm/mach-s3c24xx/s3c2412.c

   1 /*
   2  * Copyright (c) 2006 Simtec Electronics
   3  *      Ben Dooks <ben@simtec.co.uk>
   4  *
   5  * http://armlinux.simtec.co.uk/.
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License version 2 as
   9  * published by the Free Software Foundation.
  10 */
  11
  12 #include <linux/kernel.h>
  13 #include <linux/types.h>
  14 #include <linux/interrupt.h>
  15 #include <linux/list.h>
  16 #include <linux/timer.h>
  17 #include <linux/init.h>
  18 #include <linux/clk.h>
  19 #include <linux/delay.h>
  20 #include <linux/device.h>
  21 #include <linux/syscore_ops.h>
  22 #include <linux/serial_core.h>
  23 #include <linux/serial_s3c.h>
  24 #include <linux/platform_device.h>
  25 #include <linux/io.h>
  26 #include <linux/reboot.h>
  27
  28 #include <asm/mach/arch.h>
  29 #include <asm/mach/map.h>
  30 #include <asm/mach/irq.h>
  31
  32 #include <asm/proc-fns.h>
  33 #include <asm/irq.h>
  34 #include <asm/system_misc.h>
  35
  36 #include <mach/hardware.h>
  37 #include <mach/regs-clock.h>
  38 #include <mach/regs-gpio.h>
  39
  40 #include <plat/cpu.h>
  41 #include <plat/cpu-freq.h>
  42 #include <plat/devs.h>
  43 #include <plat/pm.h>
  44 #include <plat/regs-spi.h>
  45
  46 #include "common.h"
  47 #include "nand-core.h"
  48 #include "regs-dsc.h"
  49 #include "s3c2412-power.h"
  50
  51 #ifndef CONFIG_CPU_S3C2412_ONLY
  52 void __iomem *s3c24xx_va_gpio2 = S3C24XX_VA_GPIO;
  53
  54 static inline void s3c2412_init_gpio2(void)
  55 {
  56         s3c24xx_va_gpio2 = S3C24XX_VA_GPIO + 0x10;
  57 }
  58 #else
  59 #define s3c2412_init_gpio2() do { } while(0)
  60 #endif
  61
  62 /* Initial IO mappings */
  63
  64 static struct map_desc s3c2412_iodesc[] __initdata = {
  65         IODESC_ENT(CLKPWR),
  66         IODESC_ENT(TIMER),
  67         IODESC_ENT(WATCHDOG),
  68         {
  69                 .virtual = (unsigned long)S3C2412_VA_SSMC,
  70                 .pfn     = __phys_to_pfn(S3C2412_PA_SSMC),
  71                 .length  = SZ_1M,
  72                 .type    = MT_DEVICE,
  73         },
  74         {
  75                 .virtual = (unsigned long)S3C2412_VA_EBI,
  76                 .pfn     = __phys_to_pfn(S3C2412_PA_EBI),
  77                 .length  = SZ_1M,
  78                 .type    = MT_DEVICE,
  79         },
  80 };
  81
  82 /* uart registration process */
  83
  84 void __init s3c2412_init_uarts(struct s3c2410_uartcfg *cfg, int no)
  85 {
  86         s3c24xx_init_uartdevs("s3c2412-uart", s3c2410_uart_resources, cfg, no);
  87
  88         /* rename devices that are s3c2412/s3c2413 specific */
  89         s3c_device_sdi.name  = "s3c2412-sdi";
  90         s3c_device_lcd.name  = "s3c2412-lcd";
  91         s3c_nand_setname("s3c2412-nand");
  92
  93         /* alter IRQ of SDI controller */
  94
  95         s3c_device_sdi.resource[1].start = IRQ_S3C2412_SDI;
  96         s3c_device_sdi.resource[1].end   = IRQ_S3C2412_SDI;
  97
  98         /* spi channel related changes, s3c2412/13 specific */
  99         s3c_device_spi0.name = "s3c2412-spi";
 100         s3c_device_spi0.resource[0].end = S3C24XX_PA_SPI + 0x24;
 101         s3c_device_spi1.name = "s3c2412-spi";
 102         s3c_device_spi1.resource[0].start = S3C24XX_PA_SPI + S3C2412_SPI1;
 103         s3c_device_spi1.resource[0].end = S3C24XX_PA_SPI + S3C2412_SPI1 + 0x24;
 104
 105 }
 106
 107 /* s3c2412_idle
 108  *
 109  * use the standard idle call by ensuring the idle mode
 110  * in power config, then issuing the idle co-processor
 111  * instruction
 112 */
 113
 114 static void s3c2412_idle(void)
 115 {
 116         unsigned long tmp;
 117
 118         /* ensure our idle mode is to go to idle */
 119
 120         tmp = __raw_readl(S3C2412_PWRCFG);
 121         tmp &= ~S3C2412_PWRCFG_STANDBYWFI_MASK;
 122         tmp |= S3C2412_PWRCFG_STANDBYWFI_IDLE;
 123         __raw_writel(tmp, S3C2412_PWRCFG);
 124
 125         cpu_do_idle();
 126 }
 127
 128 /* s3c2412_map_io
 129  *
 130  * register the standard cpu IO areas, and any passed in from the
 131  * machine specific initialisation.
 132 */
 133
 134 void __init s3c2412_map_io(void)
 135 {
 136         /* move base of IO */
 137
 138         s3c2412_init_gpio2();
 139
 140         /* set our idle function */
 141
 142         arm_pm_idle = s3c2412_idle;
 143
 144         /* register our io-tables */
 145
 146         iotable_init(s3c2412_iodesc, ARRAY_SIZE(s3c2412_iodesc));
 147 }
 148
 149 /* need to register the subsystem before we actually register the device, and
 150  * we also need to ensure that it has been initialised before any of the
 151  * drivers even try to use it (even if not on an s3c2412 based system)
 152  * as a driver which may support both 2410 and 2440 may try and use it.
 153 */
 154
 155 struct bus_type s3c2412_subsys = {
 156         .name = "s3c2412-core",
 157         .dev_name = "s3c2412-core",
 158 };
 159
 160 static int __init s3c2412_core_init(void)
 161 {
 162         return subsys_system_register(&s3c2412_subsys, NULL);
 163 }
 164
 165 core_initcall(s3c2412_core_init);
 166
 167 static struct device s3c2412_dev = {
 168         .bus            = &s3c2412_subsys,
 169 };
 170
 171 int __init s3c2412_init(void)
 172 {
 173         printk("S3C2412: Initialising architecture\n");
 174
 175 #ifdef CONFIG_PM_SLEEP
 176         register_syscore_ops(&s3c2412_pm_syscore_ops);
 177         register_syscore_ops(&s3c24xx_irq_syscore_ops);
 178 #endif
 179
 180         return device_register(&s3c2412_dev);
 181 }