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gpio16xx.c

/*
 * OMAP16xx specific gpio init
 *
 * Copyright (C) 2010 Texas Instruments Incorporated - http://www.ti.com/
 *
 * Author:
 *    Charulatha V <charu@ti.com>
 *
 * 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 version 2.
 *
 * This program is distributed "as is" WITHOUT ANY WARRANTY of any
 * kind, whether express or implied; without even the implied warranty
 * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 */

#include <linux/gpio.h>

#define OMAP1610_GPIO1_BASE         0xfffbe400
#define OMAP1610_GPIO2_BASE         0xfffbec00
#define OMAP1610_GPIO3_BASE         0xfffbb400
#define OMAP1610_GPIO4_BASE         0xfffbbc00
#define OMAP1_MPUIO_VBASE           OMAP1_MPUIO_BASE

/* mpu gpio */
static struct __initdata resource omap16xx_mpu_gpio_resources[] = {
      {
            .start      = OMAP1_MPUIO_VBASE,
            .end  = OMAP1_MPUIO_VBASE + SZ_2K - 1,
            .flags      = IORESOURCE_MEM,
      },
      {
            .start      = INT_MPUIO,
            .flags      = IORESOURCE_IRQ,
      },
};

static struct __initdata omap_gpio_platform_data omap16xx_mpu_gpio_config = {
      .virtual_irq_start      = IH_MPUIO_BASE,
      .bank_type        = METHOD_MPUIO,
      .bank_width       = 16,
      .bank_stride            = 1,
};

static struct __initdata platform_device omap16xx_mpu_gpio = {
      .name           = "omap_gpio",
      .id             = 0,
      .dev            = {
            .platform_data = &omap16xx_mpu_gpio_config,
      },
      .num_resources = ARRAY_SIZE(omap16xx_mpu_gpio_resources),
      .resource = omap16xx_mpu_gpio_resources,
};

/* gpio1 */
static struct __initdata resource omap16xx_gpio1_resources[] = {
      {
            .start      = OMAP1610_GPIO1_BASE,
            .end  = OMAP1610_GPIO1_BASE + SZ_2K - 1,
            .flags      = IORESOURCE_MEM,
      },
      {
            .start      = INT_GPIO_BANK1,
            .flags      = IORESOURCE_IRQ,
      },
};

static struct __initdata omap_gpio_platform_data omap16xx_gpio1_config = {
      .virtual_irq_start      = IH_GPIO_BASE,
      .bank_type        = METHOD_GPIO_1610,
      .bank_width       = 16,
};

static struct __initdata platform_device omap16xx_gpio1 = {
      .name           = "omap_gpio",
      .id             = 1,
      .dev            = {
            .platform_data = &omap16xx_gpio1_config,
      },
      .num_resources = ARRAY_SIZE(omap16xx_gpio1_resources),
      .resource = omap16xx_gpio1_resources,
};

/* gpio2 */
static struct __initdata resource omap16xx_gpio2_resources[] = {
      {
            .start      = OMAP1610_GPIO2_BASE,
            .end  = OMAP1610_GPIO2_BASE + SZ_2K - 1,
            .flags      = IORESOURCE_MEM,
      },
      {
            .start      = INT_1610_GPIO_BANK2,
            .flags      = IORESOURCE_IRQ,
      },
};

static struct __initdata omap_gpio_platform_data omap16xx_gpio2_config = {
      .virtual_irq_start      = IH_GPIO_BASE + 16,
      .bank_type        = METHOD_GPIO_1610,
      .bank_width       = 16,
};

static struct __initdata platform_device omap16xx_gpio2 = {
      .name           = "omap_gpio",
      .id             = 2,
      .dev            = {
            .platform_data = &omap16xx_gpio2_config,
      },
      .num_resources = ARRAY_SIZE(omap16xx_gpio2_resources),
      .resource = omap16xx_gpio2_resources,
};

/* gpio3 */
static struct __initdata resource omap16xx_gpio3_resources[] = {
      {
            .start      = OMAP1610_GPIO3_BASE,
            .end  = OMAP1610_GPIO3_BASE + SZ_2K - 1,
            .flags      = IORESOURCE_MEM,
      },
      {
            .start      = INT_1610_GPIO_BANK3,
            .flags      = IORESOURCE_IRQ,
      },
};

static struct __initdata omap_gpio_platform_data omap16xx_gpio3_config = {
      .virtual_irq_start      = IH_GPIO_BASE + 32,
      .bank_type        = METHOD_GPIO_1610,
      .bank_width       = 16,
};

static struct __initdata platform_device omap16xx_gpio3 = {
      .name           = "omap_gpio",
      .id             = 3,
      .dev            = {
            .platform_data = &omap16xx_gpio3_config,
      },
      .num_resources = ARRAY_SIZE(omap16xx_gpio3_resources),
      .resource = omap16xx_gpio3_resources,
};

/* gpio4 */
static struct __initdata resource omap16xx_gpio4_resources[] = {
      {
            .start      = OMAP1610_GPIO4_BASE,
            .end  = OMAP1610_GPIO4_BASE + SZ_2K - 1,
            .flags      = IORESOURCE_MEM,
      },
      {
            .start      = INT_1610_GPIO_BANK4,
            .flags      = IORESOURCE_IRQ,
      },
};

static struct __initdata omap_gpio_platform_data omap16xx_gpio4_config = {
      .virtual_irq_start      = IH_GPIO_BASE + 48,
      .bank_type        = METHOD_GPIO_1610,
      .bank_width       = 16,
};

static struct __initdata platform_device omap16xx_gpio4 = {
      .name           = "omap_gpio",
      .id             = 4,
      .dev            = {
            .platform_data = &omap16xx_gpio4_config,
      },
      .num_resources = ARRAY_SIZE(omap16xx_gpio4_resources),
      .resource = omap16xx_gpio4_resources,
};

static struct __initdata platform_device * omap16xx_gpio_dev[] = {
      &omap16xx_mpu_gpio,
      &omap16xx_gpio1,
      &omap16xx_gpio2,
      &omap16xx_gpio3,
      &omap16xx_gpio4,
};

/*
 * omap16xx_gpio_init needs to be done before
 * machine_init functions access gpio APIs.
 * Hence omap16xx_gpio_init is a postcore_initcall.
 */
static int __init omap16xx_gpio_init(void)
{
      int i;

      if (!cpu_is_omap16xx())
            return -EINVAL;

      for (i = 0; i < ARRAY_SIZE(omap16xx_gpio_dev); i++)
            platform_device_register(omap16xx_gpio_dev[i]);

      gpio_bank_count = ARRAY_SIZE(omap16xx_gpio_dev);

      return 0;
}
postcore_initcall(omap16xx_gpio_init);

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