arch/arm/mach-s3c24xx/s3c2412.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 //
   3 // Copyright (c) 2006 Simtec Electronics
   4 //      Ben Dooks <ben@simtec.co.uk>
   5 //
   6 // http://armlinux.simtec.co.uk/.
   7
   8 #include <linux/kernel.h>
   9 #include <linux/types.h>
  10 #include <linux/interrupt.h>
  11 #include <linux/list.h>
  12 #include <linux/timer.h>
  13 #include <linux/init.h>
  14 #include <linux/clk.h>
  15 #include <linux/delay.h>
  16 #include <linux/device.h>
  17 #include <linux/syscore_ops.h>
  18 #include <linux/serial_core.h>
  19 #include <linux/serial_s3c.h>
  20 #include <linux/platform_device.h>
  21 #include <linux/io.h>
  22 #include <linux/reboot.h>
  23
  24 #include <asm/mach/arch.h>
  25 #include <asm/mach/map.h>
  26 #include <asm/mach/irq.h>
  27
  28 #include <asm/proc-fns.h>
  29 #include <asm/irq.h>
  30 #include <asm/system_misc.h>
  31
  32 #include <mach/hardware.h>
  33 #include <mach/regs-clock.h>
  34 #include <mach/regs-gpio.h>
  35
  36 #include <plat/cpu.h>
  37 #include <plat/cpu-freq.h>
  38 #include <plat/devs.h>
  39 #include <plat/pm.h>
  40 #include <plat/regs-spi.h>
  41
  42 #include "common.h"
  43 #include "nand-core.h"
  44 #include "regs-dsc.h"
  45 #include "s3c2412-power.h"
  46
  47 #ifndef CONFIG_CPU_S3C2412_ONLY
  48 void __iomem *s3c24xx_va_gpio2 = S3C24XX_VA_GPIO;
  49
  50 static inline void s3c2412_init_gpio2(void)
  51 {
  52         s3c24xx_va_gpio2 = S3C24XX_VA_GPIO + 0x10;
  53 }
  54 #else
  55 #define s3c2412_init_gpio2() do { } while(0)
  56 #endif
  57
  58 /* Initial IO mappings */
  59
  60 static struct map_desc s3c2412_iodesc[] __initdata = {
  61         IODESC_ENT(CLKPWR),
  62         IODESC_ENT(TIMER),
  63         IODESC_ENT(WATCHDOG),
  64         {
  65                 .virtual = (unsigned long)S3C2412_VA_SSMC,
  66                 .pfn     = __phys_to_pfn(S3C2412_PA_SSMC),
  67                 .length  = SZ_1M,
  68                 .type    = MT_DEVICE,
  69         },
  70         {
  71                 .virtual = (unsigned long)S3C2412_VA_EBI,
  72                 .pfn     = __phys_to_pfn(S3C2412_PA_EBI),
  73                 .length  = SZ_1M,
  74                 .type    = MT_DEVICE,
  75         },
  76 };
  77
  78 /* uart registration process */
  79
  80 void __init s3c2412_init_uarts(struct s3c2410_uartcfg *cfg, int no)
  81 {
  82         s3c24xx_init_uartdevs("s3c2412-uart", s3c2410_uart_resources, cfg, no);
  83
  84         /* rename devices that are s3c2412/s3c2413 specific */
  85         s3c_device_sdi.name  = "s3c2412-sdi";
  86         s3c_device_lcd.name  = "s3c2412-lcd";
  87         s3c_nand_setname("s3c2412-nand");
  88
  89         /* alter IRQ of SDI controller */
  90
  91         s3c_device_sdi.resource[1].start = IRQ_S3C2412_SDI;
  92         s3c_device_sdi.resource[1].end   = IRQ_S3C2412_SDI;
  93
  94         /* spi channel related changes, s3c2412/13 specific */
  95         s3c_device_spi0.name = "s3c2412-spi";
  96         s3c_device_spi0.resource[0].end = S3C24XX_PA_SPI + 0x24;
  97         s3c_device_spi1.name = "s3c2412-spi";
  98         s3c_device_spi1.resource[0].start = S3C24XX_PA_SPI + S3C2412_SPI1;
  99         s3c_device_spi1.resource[0].end = S3C24XX_PA_SPI + S3C2412_SPI1 + 0x24;
 100
 101 }
 102
 103 /* s3c2412_idle
 104  *
 105  * use the standard idle call by ensuring the idle mode
 106  * in power config, then issuing the idle co-processor
 107  * instruction
 108 */
 109
 110 static void s3c2412_idle(void)
 111 {
 112         unsigned long tmp;
 113
 114         /* ensure our idle mode is to go to idle */
 115
 116         tmp = __raw_readl(S3C2412_PWRCFG);
 117         tmp &= ~S3C2412_PWRCFG_STANDBYWFI_MASK;
 118         tmp |= S3C2412_PWRCFG_STANDBYWFI_IDLE;
 119         __raw_writel(tmp, S3C2412_PWRCFG);
 120
 121         cpu_do_idle();
 122 }
 123
 124 /* s3c2412_map_io
 125  *
 126  * register the standard cpu IO areas, and any passed in from the
 127  * machine specific initialisation.
 128 */
 129
 130 void __init s3c2412_map_io(void)
 131 {
 132         /* move base of IO */
 133
 134         s3c2412_init_gpio2();
 135
 136         /* set our idle function */
 137
 138         arm_pm_idle = s3c2412_idle;
 139
 140         /* register our io-tables */
 141
 142         iotable_init(s3c2412_iodesc, ARRAY_SIZE(s3c2412_iodesc));
 143 }
 144
 145 /* need to register the subsystem before we actually register the device, and
 146  * we also need to ensure that it has been initialised before any of the
 147  * drivers even try to use it (even if not on an s3c2412 based system)
 148  * as a driver which may support both 2410 and 2440 may try and use it.
 149 */
 150
 151 struct bus_type s3c2412_subsys = {
 152         .name = "s3c2412-core",
 153         .dev_name = "s3c2412-core",
 154 };
 155
 156 static int __init s3c2412_core_init(void)
 157 {
 158         return subsys_system_register(&s3c2412_subsys, NULL);
 159 }
 160
 161 core_initcall(s3c2412_core_init);
 162
 163 static struct device s3c2412_dev = {
 164         .bus            = &s3c2412_subsys,
 165 };
 166
 167 int __init s3c2412_init(void)
 168 {
 169         printk("S3C2412: Initialising architecture\n");
 170
 171 #ifdef CONFIG_PM_SLEEP
 172         register_syscore_ops(&s3c2412_pm_syscore_ops);
 173         register_syscore_ops(&s3c24xx_irq_syscore_ops);
 174 #endif
 175
 176         return device_register(&s3c2412_dev);
 177 }