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 #define __MEM_4K_RESOURCE(x) \
  35         .res = {.start = (x), .end = (x) + SZ_4K - 1, .flags = IORESOURCE_MEM}
  36
  37 /* The 8815 has 4 GPIO blocks, let's register them immediately */
  38
  39 #define GPIO_RESOURCE(block)                                            \
  40         {                                                               \
  41                 .start  = NOMADIK_GPIO##block##_BASE,                   \
  42                 .end    = NOMADIK_GPIO##block##_BASE + SZ_4K - 1,       \
  43                 .flags  = IORESOURCE_MEM,                               \
  44         },                                                              \
  45         {                                                               \
  46                 .start  = IRQ_GPIO##block,                              \
  47                 .end    = IRQ_GPIO##block,                              \
  48                 .flags  = IORESOURCE_IRQ,                               \
  49         }
  50
  51 #define GPIO_DEVICE(block)                                              \
  52         {                                                               \
  53                 .name           = "gpio",                               \
  54                 .id             = block,                                \
  55                 .num_resources  = 2,                                    \
  56                 .resource       = &cpu8815_gpio_resources[block * 2],   \
  57                 .dev = {                                                \
  58                         .platform_data = &cpu8815_gpio[block],          \
  59                 },                                                      \
  60         }
  61
  62 static struct nmk_gpio_platform_data cpu8815_gpio[] = {
  63         {
  64                 .name = "GPIO-0-31",
  65                 .first_gpio = 0,
  66                 .first_irq = NOMADIK_GPIO_TO_IRQ(0),
  67         }, {
  68                 .name = "GPIO-32-63",
  69                 .first_gpio = 32,
  70                 .first_irq = NOMADIK_GPIO_TO_IRQ(32),
  71         }, {
  72                 .name = "GPIO-64-95",
  73                 .first_gpio = 64,
  74                 .first_irq = NOMADIK_GPIO_TO_IRQ(64),
  75         }, {
  76                 .name = "GPIO-96-127", /* 124..127 not routed to pin */
  77                 .first_gpio = 96,
  78                 .first_irq = NOMADIK_GPIO_TO_IRQ(96),
  79         }
  80 };
  81
  82 static struct resource cpu8815_gpio_resources[] = {
  83         GPIO_RESOURCE(0),
  84         GPIO_RESOURCE(1),
  85         GPIO_RESOURCE(2),
  86         GPIO_RESOURCE(3),
  87 };
  88
  89 static struct platform_device cpu8815_platform_gpio[] = {
  90         GPIO_DEVICE(0),
  91         GPIO_DEVICE(1),
  92         GPIO_DEVICE(2),
  93         GPIO_DEVICE(3),
  94 };
  95
  96 static struct amba_device cpu8815_amba_rng = {
  97         .dev = {
  98                 .init_name = "rng",
  99         },
 100         __MEM_4K_RESOURCE(NOMADIK_RNG_BASE),
 101 };
 102
 103 static struct platform_device *platform_devs[] __initdata = {
 104         cpu8815_platform_gpio + 0,
 105         cpu8815_platform_gpio + 1,
 106         cpu8815_platform_gpio + 2,
 107         cpu8815_platform_gpio + 3,
 108 };
 109
 110 static struct amba_device *amba_devs[] __initdata = {
 111         &cpu8815_amba_rng
 112 };
 113
 114 static int __init cpu8815_init(void)
 115 {
 116         int i;
 117
 118         platform_add_devices(platform_devs, ARRAY_SIZE(platform_devs));
 119         for (i = 0; i < ARRAY_SIZE(amba_devs); i++)
 120                 amba_device_register(amba_devs[i], &iomem_resource);
 121         return 0;
 122 }
 123 arch_initcall(cpu8815_init);
 124
 125 /* All SoC devices live in the same area (see hardware.h) */
 126 static struct map_desc nomadik_io_desc[] __initdata = {
 127         {
 128                 .virtual =      NOMADIK_IO_VIRTUAL,
 129                 .pfn =          __phys_to_pfn(NOMADIK_IO_PHYSICAL),
 130                 .length =       NOMADIK_IO_SIZE,
 131                 .type =         MT_DEVICE,
 132         }
 133         /* static ram and secured ram may be added later */
 134 };
 135
 136 void __init cpu8815_map_io(void)
 137 {
 138         iotable_init(nomadik_io_desc, ARRAY_SIZE(nomadik_io_desc));
 139 }
 140
 141 void __init cpu8815_init_irq(void)
 142 {
 143         /* This modified VIC cell has two register blocks, at 0 and 0x20 */
 144         vic_init(io_p2v(NOMADIK_IC_BASE + 0x00), IRQ_VIC_START +  0, ~0, 0);
 145         vic_init(io_p2v(NOMADIK_IC_BASE + 0x20), IRQ_VIC_START + 32, ~0, 0);
 146 }
 147
 148 /*
 149  * This function is called from the board init ("init_machine").
 150  */
 151  void __init cpu8815_platform_init(void)
 152 {
 153 #ifdef CONFIG_CACHE_L2X0
 154         /* At full speed latency must be >=2, so 0x249 in low bits */
 155         l2x0_init(io_p2v(NOMADIK_L2CC_BASE), 0x00730249, 0xfe000fff);
 156 #endif
 157          return;
 158 }