arch/arm/mach-s5p64x0/cpu.c

   1 /* linux/arch/arm/mach-s5p64x0/cpu.c
   2  *
   3  * Copyright (c) 2009-2010 Samsung Electronics Co., Ltd.
   4  *              http://www.samsung.com
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2 as
   8  * published by the Free Software Foundation.
   9 */
  10
  11 #include <linux/kernel.h>
  12 #include <linux/types.h>
  13 #include <linux/interrupt.h>
  14 #include <linux/list.h>
  15 #include <linux/timer.h>
  16 #include <linux/init.h>
  17 #include <linux/clk.h>
  18 #include <linux/io.h>
  19 #include <linux/sysdev.h>
  20 #include <linux/serial_core.h>
  21 #include <linux/platform_device.h>
  22 #include <linux/sched.h>
  23 #include <linux/dma-mapping.h>
  24
  25 #include <asm/mach/arch.h>
  26 #include <asm/mach/map.h>
  27 #include <asm/mach/irq.h>
  28 #include <asm/proc-fns.h>
  29 #include <asm/irq.h>
  30
  31 #include <mach/hardware.h>
  32 #include <mach/map.h>
  33 #include <mach/regs-clock.h>
  34
  35 #include <plat/regs-serial.h>
  36 #include <plat/cpu.h>
  37 #include <plat/devs.h>
  38 #include <plat/clock.h>
  39 #include <plat/s5p6440.h>
  40 #include <plat/s5p6450.h>
  41 #include <plat/adc-core.h>
  42 #include <plat/fb-core.h>
  43
  44 /* Initial IO mappings */
  45
  46 static struct map_desc s5p64x0_iodesc[] __initdata = {
  47         {
  48                 .virtual        = (unsigned long)S5P_VA_GPIO,
  49                 .pfn            = __phys_to_pfn(S5P64X0_PA_GPIO),
  50                 .length         = SZ_4K,
  51                 .type           = MT_DEVICE,
  52         }, {
  53                 .virtual        = (unsigned long)VA_VIC0,
  54                 .pfn            = __phys_to_pfn(S5P64X0_PA_VIC0),
  55                 .length         = SZ_16K,
  56                 .type           = MT_DEVICE,
  57         }, {
  58                 .virtual        = (unsigned long)VA_VIC1,
  59                 .pfn            = __phys_to_pfn(S5P64X0_PA_VIC1),
  60                 .length         = SZ_16K,
  61                 .type           = MT_DEVICE,
  62         },
  63 };
  64
  65 static struct map_desc s5p6440_iodesc[] __initdata = {
  66         {
  67                 .virtual        = (unsigned long)S3C_VA_UART,
  68                 .pfn            = __phys_to_pfn(S5P6440_PA_UART(0)),
  69                 .length         = SZ_4K,
  70                 .type           = MT_DEVICE,
  71         },
  72 };
  73
  74 static struct map_desc s5p6450_iodesc[] __initdata = {
  75         {
  76                 .virtual        = (unsigned long)S3C_VA_UART,
  77                 .pfn            = __phys_to_pfn(S5P6450_PA_UART(0)),
  78                 .length         = SZ_512K,
  79                 .type           = MT_DEVICE,
  80         }, {
  81                 .virtual        = (unsigned long)S3C_VA_UART + SZ_512K,
  82                 .pfn            = __phys_to_pfn(S5P6450_PA_UART(5)),
  83                 .length         = SZ_4K,
  84                 .type           = MT_DEVICE,
  85         },
  86 };
  87
  88 static void s5p64x0_idle(void)
  89 {
  90         unsigned long val;
  91
  92         if (!need_resched()) {
  93                 val = __raw_readl(S5P64X0_PWR_CFG);
  94                 val &= ~(0x3 << 5);
  95                 val |= (0x1 << 5);
  96                 __raw_writel(val, S5P64X0_PWR_CFG);
  97
  98                 cpu_do_idle();
  99         }
 100         local_irq_enable();
 101 }
 102
 103 /*
 104  * s5p64x0_map_io
 105  *
 106  * register the standard CPU IO areas
 107  */
 108
 109 void __init s5p6440_map_io(void)
 110 {
 111         /* initialize any device information early */
 112         s3c_adc_setname("s3c64xx-adc");
 113         s3c_fb_setname("s5p64x0-fb");
 114
 115         iotable_init(s5p64x0_iodesc, ARRAY_SIZE(s5p64x0_iodesc));
 116         iotable_init(s5p6440_iodesc, ARRAY_SIZE(s5p6440_iodesc));
 117         init_consistent_dma_size(SZ_8M);
 118 }
 119
 120 void __init s5p6450_map_io(void)
 121 {
 122         /* initialize any device information early */
 123         s3c_adc_setname("s3c64xx-adc");
 124         s3c_fb_setname("s5p64x0-fb");
 125
 126         iotable_init(s5p64x0_iodesc, ARRAY_SIZE(s5p64x0_iodesc));
 127         iotable_init(s5p6450_iodesc, ARRAY_SIZE(s5p6450_iodesc));
 128         init_consistent_dma_size(SZ_8M);
 129 }
 130
 131 /*
 132  * s5p64x0_init_clocks
 133  *
 134  * register and setup the CPU clocks
 135  */
 136
 137 void __init s5p6440_init_clocks(int xtal)
 138 {
 139         printk(KERN_DEBUG "%s: initializing clocks\n", __func__);
 140
 141         s3c24xx_register_baseclocks(xtal);
 142         s5p_register_clocks(xtal);
 143         s5p6440_register_clocks();
 144         s5p6440_setup_clocks();
 145 }
 146
 147 void __init s5p6450_init_clocks(int xtal)
 148 {
 149         printk(KERN_DEBUG "%s: initializing clocks\n", __func__);
 150
 151         s3c24xx_register_baseclocks(xtal);
 152         s5p_register_clocks(xtal);
 153         s5p6450_register_clocks();
 154         s5p6450_setup_clocks();
 155 }
 156
 157 /*
 158  * s5p64x0_init_irq
 159  *
 160  * register the CPU interrupts
 161  */
 162
 163 void __init s5p6440_init_irq(void)
 164 {
 165         /* S5P6440 supports 2 VIC */
 166         u32 vic[2];
 167
 168         /*
 169          * VIC0 is missing IRQ_VIC0[3, 4, 8, 10, (12-22)]
 170          * VIC1 is missing IRQ VIC1[1, 3, 4, 10, 11, 12, 14, 15, 22]
 171          */
 172         vic[0] = 0xff800ae7;
 173         vic[1] = 0xffbf23e5;
 174
 175         s5p_init_irq(vic, ARRAY_SIZE(vic));
 176 }
 177
 178 void __init s5p6450_init_irq(void)
 179 {
 180         /* S5P6450 supports only 2 VIC */
 181         u32 vic[2];
 182
 183         /*
 184          * VIC0 is missing IRQ_VIC0[(13-15), (21-22)]
 185          * VIC1 is missing IRQ VIC1[12, 14, 23]
 186          */
 187         vic[0] = 0xff9f1fff;
 188         vic[1] = 0xff7fafff;
 189
 190         s5p_init_irq(vic, ARRAY_SIZE(vic));
 191 }
 192
 193 struct sysdev_class s5p64x0_sysclass = {
 194         .name   = "s5p64x0-core",
 195 };
 196
 197 static struct sys_device s5p64x0_sysdev = {
 198         .cls    = &s5p64x0_sysclass,
 199 };
 200
 201 static int __init s5p64x0_core_init(void)
 202 {
 203         return sysdev_class_register(&s5p64x0_sysclass);
 204 }
 205 core_initcall(s5p64x0_core_init);
 206
 207 int __init s5p64x0_init(void)
 208 {
 209         printk(KERN_INFO "S5P64X0(S5P6440/S5P6450): Initializing architecture\n");
 210
 211         /* set idle function */
 212         pm_idle = s5p64x0_idle;
 213
 214         return sysdev_register(&s5p64x0_sysdev);
 215 }