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cpu-8815.c

/*
 * Copyright STMicroelectronics, 2007.
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

#include <linux/types.h>
#include <linux/init.h>
#include <linux/device.h>
#include <linux/amba/bus.h>
#include <linux/platform_device.h>
#include <linux/gpio.h>

#include <mach/hardware.h>
#include <mach/irqs.h>
#include <asm/mach/map.h>
#include <asm/hardware/vic.h>

#include <asm/cacheflush.h>
#include <asm/hardware/cache-l2x0.h>

#include "clock.h"

#define __MEM_4K_RESOURCE(x) \
      .res = {.start = (x), .end = (x) + SZ_4K - 1, .flags = IORESOURCE_MEM}

/* The 8815 has 4 GPIO blocks, let's register them immediately */

#define GPIO_RESOURCE(block)                                \
      {                                               \
            .start      = NOMADIK_GPIO##block##_BASE,             \
            .end  = NOMADIK_GPIO##block##_BASE + SZ_4K - 1, \
            .flags      = IORESOURCE_MEM,                   \
      },                                              \
      {                                               \
            .start      = IRQ_GPIO##block,                        \
            .end  = IRQ_GPIO##block,                        \
            .flags      = IORESOURCE_IRQ,                   \
      }

#define GPIO_DEVICE(block)                                  \
      {                                               \
            .name             = "gpio",                     \
            .id         = block,                      \
            .num_resources    = 2,                          \
            .resource   = &cpu8815_gpio_resources[block * 2],     \
            .dev = {                                  \
                  .platform_data = &cpu8815_gpio[block],          \
            },                                        \
      }

static struct nmk_gpio_platform_data cpu8815_gpio[] = {
      {
            .name = "GPIO-0-31",
            .first_gpio = 0,
            .first_irq = NOMADIK_GPIO_TO_IRQ(0),
      }, {
            .name = "GPIO-32-63",
            .first_gpio = 32,
            .first_irq = NOMADIK_GPIO_TO_IRQ(32),
      }, {
            .name = "GPIO-64-95",
            .first_gpio = 64,
            .first_irq = NOMADIK_GPIO_TO_IRQ(64),
      }, {
            .name = "GPIO-96-127", /* 124..127 not routed to pin */
            .first_gpio = 96,
            .first_irq = NOMADIK_GPIO_TO_IRQ(96),
      }
};

static struct resource cpu8815_gpio_resources[] = {
      GPIO_RESOURCE(0),
      GPIO_RESOURCE(1),
      GPIO_RESOURCE(2),
      GPIO_RESOURCE(3),
};

static struct platform_device cpu8815_platform_gpio[] = {
      GPIO_DEVICE(0),
      GPIO_DEVICE(1),
      GPIO_DEVICE(2),
      GPIO_DEVICE(3),
};

static struct amba_device cpu8815_amba_rng = {
      .dev = {
            .init_name = "rng",
      },
      __MEM_4K_RESOURCE(NOMADIK_RNG_BASE),
};

static struct platform_device *platform_devs[] __initdata = {
      cpu8815_platform_gpio + 0,
      cpu8815_platform_gpio + 1,
      cpu8815_platform_gpio + 2,
      cpu8815_platform_gpio + 3,
};

static struct amba_device *amba_devs[] __initdata = {
      &cpu8815_amba_rng
};

static int __init cpu8815_init(void)
{
      int i;

      platform_add_devices(platform_devs, ARRAY_SIZE(platform_devs));
      for (i = 0; i < ARRAY_SIZE(amba_devs); i++)
            amba_device_register(amba_devs[i], &iomem_resource);
      return 0;
}
arch_initcall(cpu8815_init);

/* All SoC devices live in the same area (see hardware.h) */
static struct map_desc nomadik_io_desc[] __initdata = {
      {
            .virtual =  NOMADIK_IO_VIRTUAL,
            .pfn =            __phys_to_pfn(NOMADIK_IO_PHYSICAL),
            .length =   NOMADIK_IO_SIZE,
            .type =     MT_DEVICE,
      }
      /* static ram and secured ram may be added later */
};

void __init cpu8815_map_io(void)
{
      iotable_init(nomadik_io_desc, ARRAY_SIZE(nomadik_io_desc));
}

void __init cpu8815_init_irq(void)
{
      /* This modified VIC cell has two register blocks, at 0 and 0x20 */
      vic_init(io_p2v(NOMADIK_IC_BASE + 0x00), IRQ_VIC_START +  0, ~0, 0);
      vic_init(io_p2v(NOMADIK_IC_BASE + 0x20), IRQ_VIC_START + 32, ~0, 0);

      /*
       * Init clocks here so that they are available for system timer
       * initialization.
       */
      clk_init();
}

/*
 * This function is called from the board init ("init_machine").
 */
 void __init cpu8815_platform_init(void)
{
#ifdef CONFIG_CACHE_L2X0
      /* At full speed latency must be >=2, so 0x249 in low bits */
      l2x0_init(io_p2v(NOMADIK_L2CC_BASE), 0x00730249, 0xfe000fff);
#endif
       return;
}

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