release/src-rt-6.x.4708/linux/linux-2.6.36/arch/arm/mach-nomadik/cpu-8815.c

   1 /*
   2  * Copyright STMicroelectronics, 2007.
   3  *
   4  *  This program is free software; you can redistribute it and/or modify
   5  *  it under the terms of the GNU General Public License as published by
   6  *  the Free Software Foundation; either version 2 of the License, or
   7  *  (at your option) any later version.
   8  *
   9  *  This program is distributed in the hope that it will be useful,
  10  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  *  GNU General Public License for more details.
  13  *
  14  *  You should have received a copy of the GNU General Public License
  15  *  along with this program; if not, write to the Free Software
  16  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  17  */
  18
  19 #include <linux/types.h>
  20 #include <linux/init.h>
  21 #include <linux/device.h>
  22 #include <linux/amba/bus.h>
  23 #include <linux/platform_device.h>
  24 #include <linux/gpio.h>
  25
  26 #include <mach/hardware.h>
  27 #include <mach/irqs.h>
  28 #include <asm/mach/map.h>
  29 #include <asm/hardware/vic.h>
  30
  31 #include <asm/cacheflush.h>
  32 #include <asm/hardware/cache-l2x0.h>
  33
  34 #include "clock.h"
  35
  36 #define __MEM_4K_RESOURCE(x) \
  37         .res = {.start = (x), .end = (x) + SZ_4K - 1, .flags = IORESOURCE_MEM}
  38
  39 /* The 8815 has 4 GPIO blocks, let's register them immediately */
  40
  41 #define GPIO_RESOURCE(block)                                            \
  42         {                                                               \
  43                 .start  = NOMADIK_GPIO##block##_BASE,                   \
  44                 .end    = NOMADIK_GPIO##block##_BASE + SZ_4K - 1,       \
  45                 .flags  = IORESOURCE_MEM,                               \
  46         },                                                              \
  47         {                                                               \
  48                 .start  = IRQ_GPIO##block,                              \
  49                 .end    = IRQ_GPIO##block,                              \
  50                 .flags  = IORESOURCE_IRQ,                               \
  51         }
  52
  53 #define GPIO_DEVICE(block)                                              \
  54         {                                                               \
  55                 .name           = "gpio",                               \
  56                 .id             = block,                                \
  57                 .num_resources  = 2,                                    \
  58                 .resource       = &cpu8815_gpio_resources[block * 2],   \
  59                 .dev = {                                                \
  60                         .platform_data = &cpu8815_gpio[block],          \
  61                 },                                                      \
  62         }
  63
  64 static struct nmk_gpio_platform_data cpu8815_gpio[] = {
  65         {
  66                 .name = "GPIO-0-31",
  67                 .first_gpio = 0,
  68                 .first_irq = NOMADIK_GPIO_TO_IRQ(0),
  69         }, {
  70                 .name = "GPIO-32-63",
  71                 .first_gpio = 32,
  72                 .first_irq = NOMADIK_GPIO_TO_IRQ(32),
  73         }, {
  74                 .name = "GPIO-64-95",
  75                 .first_gpio = 64,
  76                 .first_irq = NOMADIK_GPIO_TO_IRQ(64),
  77         }, {
  78                 .name = "GPIO-96-127", /* 124..127 not routed to pin */
  79                 .first_gpio = 96,
  80                 .first_irq = NOMADIK_GPIO_TO_IRQ(96),
  81         }
  82 };
  83
  84 static struct resource cpu8815_gpio_resources[] = {
  85         GPIO_RESOURCE(0),
  86         GPIO_RESOURCE(1),
  87         GPIO_RESOURCE(2),
  88         GPIO_RESOURCE(3),
  89 };
  90
  91 static struct platform_device cpu8815_platform_gpio[] = {
  92         GPIO_DEVICE(0),
  93         GPIO_DEVICE(1),
  94         GPIO_DEVICE(2),
  95         GPIO_DEVICE(3),
  96 };
  97
  98 static struct amba_device cpu8815_amba_rng = {
  99         .dev = {
 100                 .init_name = "rng",
 101         },
 102         __MEM_4K_RESOURCE(NOMADIK_RNG_BASE),
 103 };
 104
 105 static struct platform_device *platform_devs[] __initdata = {
 106         cpu8815_platform_gpio + 0,
 107         cpu8815_platform_gpio + 1,
 108         cpu8815_platform_gpio + 2,
 109         cpu8815_platform_gpio + 3,
 110 };
 111
 112 static struct amba_device *amba_devs[] __initdata = {
 113         &cpu8815_amba_rng
 114 };
 115
 116 static int __init cpu8815_init(void)
 117 {
 118         int i;
 119
 120         platform_add_devices(platform_devs, ARRAY_SIZE(platform_devs));
 121         for (i = 0; i < ARRAY_SIZE(amba_devs); i++)
 122                 amba_device_register(amba_devs[i], &iomem_resource);
 123         return 0;
 124 }
 125 arch_initcall(cpu8815_init);
 126
 127 /* All SoC devices live in the same area (see hardware.h) */
 128 static struct map_desc nomadik_io_desc[] __initdata = {
 129         {
 130                 .virtual =      NOMADIK_IO_VIRTUAL,
 131                 .pfn =          __phys_to_pfn(NOMADIK_IO_PHYSICAL),
 132                 .length =       NOMADIK_IO_SIZE,
 133                 .type =         MT_DEVICE,
 134         }
 135         /* static ram and secured ram may be added later */
 136 };
 137
 138 void __init cpu8815_map_io(void)
 139 {
 140         iotable_init(nomadik_io_desc, ARRAY_SIZE(nomadik_io_desc));
 141 }
 142
 143 void __init cpu8815_init_irq(void)
 144 {
 145         /* This modified VIC cell has two register blocks, at 0 and 0x20 */
 146         vic_init(io_p2v(NOMADIK_IC_BASE + 0x00), IRQ_VIC_START +  0, ~0, 0);
 147         vic_init(io_p2v(NOMADIK_IC_BASE + 0x20), IRQ_VIC_START + 32, ~0, 0);
 148
 149         /*
 150          * Init clocks here so that they are available for system timer
 151          * initialization.
 152          */
 153         clk_init();
 154 }
 155
 156 /*
 157  * This function is called from the board init ("init_machine").
 158  */
 159  void __init cpu8815_platform_init(void)
 160 {
 161 #ifdef CONFIG_CACHE_L2X0
 162         /* At full speed latency must be >=2, so 0x249 in low bits */
 163         l2x0_init(io_p2v(NOMADIK_L2CC_BASE), 0x00730249, 0xfe000fff);
 164 #endif
 165          return;
 166 }