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/io.h>
  25
  26 #include <plat/gpio-nomadik.h>
  27 #include <mach/hardware.h>
  28 #include <mach/irqs.h>
  29 #include <asm/mach/map.h>
  30 #include <asm/hardware/vic.h>
  31
  32 #include <asm/cacheflush.h>
  33 #include <asm/hardware/cache-l2x0.h>
  34
  35 #include "clock.h"
  36 #include "cpu-8815.h"
  37
  38 #define __MEM_4K_RESOURCE(x) \
  39         .res = {.start = (x), .end = (x) + SZ_4K - 1, .flags = IORESOURCE_MEM}
  40
  41 /* The 8815 has 4 GPIO blocks, let's register them immediately */
  42
  43 #define GPIO_RESOURCE(block)                                            \
  44         {                                                               \
  45                 .start  = NOMADIK_GPIO##block##_BASE,                   \
  46                 .end    = NOMADIK_GPIO##block##_BASE + SZ_4K - 1,       \
  47                 .flags  = IORESOURCE_MEM,                               \
  48         },                                                              \
  49         {                                                               \
  50                 .start  = IRQ_GPIO##block,                              \
  51                 .end    = IRQ_GPIO##block,                              \
  52                 .flags  = IORESOURCE_IRQ,                               \
  53         }
  54
  55 #define GPIO_DEVICE(block)                                              \
  56         {                                                               \
  57                 .name           = "gpio",                               \
  58                 .id             = block,                                \
  59                 .num_resources  = 2,                                    \
  60                 .resource       = &cpu8815_gpio_resources[block * 2],   \
  61                 .dev = {                                                \
  62                         .platform_data = &cpu8815_gpio[block],          \
  63                 },                                                      \
  64         }
  65
  66 static struct nmk_gpio_platform_data cpu8815_gpio[] = {
  67         {
  68                 .name = "GPIO-0-31",
  69                 .first_gpio = 0,
  70                 .first_irq = NOMADIK_GPIO_TO_IRQ(0),
  71         }, {
  72                 .name = "GPIO-32-63",
  73                 .first_gpio = 32,
  74                 .first_irq = NOMADIK_GPIO_TO_IRQ(32),
  75         }, {
  76                 .name = "GPIO-64-95",
  77                 .first_gpio = 64,
  78                 .first_irq = NOMADIK_GPIO_TO_IRQ(64),
  79         }, {
  80                 .name = "GPIO-96-127", /* 124..127 not routed to pin */
  81                 .first_gpio = 96,
  82                 .first_irq = NOMADIK_GPIO_TO_IRQ(96),
  83         }
  84 };
  85
  86 static struct resource cpu8815_gpio_resources[] = {
  87         GPIO_RESOURCE(0),
  88         GPIO_RESOURCE(1),
  89         GPIO_RESOURCE(2),
  90         GPIO_RESOURCE(3),
  91 };
  92
  93 static struct platform_device cpu8815_platform_gpio[] = {
  94         GPIO_DEVICE(0),
  95         GPIO_DEVICE(1),
  96         GPIO_DEVICE(2),
  97         GPIO_DEVICE(3),
  98 };
  99
 100 static AMBA_APB_DEVICE(cpu8815_amba_rng, "rng", 0, NOMADIK_RNG_BASE, { }, NULL);
 101
 102 static struct platform_device *platform_devs[] __initdata = {
 103         cpu8815_platform_gpio + 0,
 104         cpu8815_platform_gpio + 1,
 105         cpu8815_platform_gpio + 2,
 106         cpu8815_platform_gpio + 3,
 107 };
 108
 109 static struct amba_device *amba_devs[] __initdata = {
 110         &cpu8815_amba_rng_device
 111 };
 112
 113 static int __init cpu8815_init(void)
 114 {
 115         int i;
 116
 117         platform_add_devices(platform_devs, ARRAY_SIZE(platform_devs));
 118         for (i = 0; i < ARRAY_SIZE(amba_devs); i++)
 119                 amba_device_register(amba_devs[i], &iomem_resource);
 120         return 0;
 121 }
 122 arch_initcall(cpu8815_init);
 123
 124 /* All SoC devices live in the same area (see hardware.h) */
 125 static struct map_desc nomadik_io_desc[] __initdata = {
 126         {
 127                 .virtual =      NOMADIK_IO_VIRTUAL,
 128                 .pfn =          __phys_to_pfn(NOMADIK_IO_PHYSICAL),
 129                 .length =       NOMADIK_IO_SIZE,
 130                 .type =         MT_DEVICE,
 131         }
 132         /* static ram and secured ram may be added later */
 133 };
 134
 135 void __init cpu8815_map_io(void)
 136 {
 137         iotable_init(nomadik_io_desc, ARRAY_SIZE(nomadik_io_desc));
 138 }
 139
 140 void __init cpu8815_init_irq(void)
 141 {
 142         /* This modified VIC cell has two register blocks, at 0 and 0x20 */
 143         vic_init(io_p2v(NOMADIK_IC_BASE + 0x00), IRQ_VIC_START +  0, ~0, 0);
 144         vic_init(io_p2v(NOMADIK_IC_BASE + 0x20), IRQ_VIC_START + 32, ~0, 0);
 145
 146         /*
 147          * Init clocks here so that they are available for system timer
 148          * initialization.
 149          */
 150         clk_init();
 151 }
 152
 153 /*
 154  * This function is called from the board init ("init_machine").
 155  */
 156  void __init cpu8815_platform_init(void)
 157 {
 158 #ifdef CONFIG_CACHE_L2X0
 159         /* At full speed latency must be >=2, so 0x249 in low bits */
 160         l2x0_init(io_p2v(NOMADIK_L2CC_BASE), 0x00730249, 0xfe000fff);
 161 #endif
 162          return;
 163 }
 164
 165 void cpu8815_restart(char mode, const char *cmd)
 166 {
 167         void __iomem *src_rstsr = io_p2v(NOMADIK_SRC_BASE + 0x18);
 168
 169         /* FIXME: use egpio when implemented */
 170
 171         /* Write anything to Reset status register */
 172         writel(1, src_rstsr);
 173 }