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board-overo.c

/*
 * board-overo.c (Gumstix Overo)
 *
 * Initial code: Steve Sakoman <steve@sakoman.com>
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * version 2 as published by the Free Software Foundation.
 *
 * 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., 51 Franklin St, Fifth Floor, Boston, MA
 * 02110-1301 USA
 *
 */

#include <linux/clk.h>
#include <linux/delay.h>
#include <linux/err.h>
#include <linux/init.h>
#include <linux/io.h>
#include <linux/kernel.h>
#include <linux/platform_device.h>

#include <linux/mtd/mtd.h>
#include <linux/mtd/nand.h>
#include <linux/mtd/partitions.h>

#include <asm/mach-types.h>
#include <asm/mach/arch.h>
#include <asm/mach/flash.h>
#include <asm/mach/map.h>

#include <mach/board-overo.h>
#include <mach/board.h>
#include <mach/common.h>
#include <mach/gpio.h>
#include <mach/gpmc.h>
#include <mach/hardware.h>
#include <mach/nand.h>

#define NAND_BLOCK_SIZE SZ_128K
#define GPMC_CS0_BASE  0x60
#define GPMC_CS_SIZE   0x30

static struct mtd_partition overo_nand_partitions[] = {
      {
            .name           = "xloader",
            .offset         = 0,                /* Offset = 0x00000 */
            .size           = 4 * NAND_BLOCK_SIZE,
            .mask_flags     = MTD_WRITEABLE
      },
      {
            .name           = "uboot",
            .offset         = MTDPART_OFS_APPEND,     /* Offset = 0x80000 */
            .size           = 14 * NAND_BLOCK_SIZE,
      },
      {
            .name           = "uboot environment",
            .offset         = MTDPART_OFS_APPEND,     /* Offset = 0x240000 */
            .size           = 2 * NAND_BLOCK_SIZE,
      },
      {
            .name           = "linux",
            .offset         = MTDPART_OFS_APPEND,     /* Offset = 0x280000 */
            .size           = 32 * NAND_BLOCK_SIZE,
      },
      {
            .name           = "rootfs",
            .offset         = MTDPART_OFS_APPEND,     /* Offset = 0x680000 */
            .size           = MTDPART_SIZ_FULL,
      },
};

static struct omap_nand_platform_data overo_nand_data = {
      .parts = overo_nand_partitions,
      .nr_parts = ARRAY_SIZE(overo_nand_partitions),
      .dma_channel = -1,      /* disable DMA in OMAP NAND driver */
};

static struct resource overo_nand_resource = {
      .flags            = IORESOURCE_MEM,
};

static struct platform_device overo_nand_device = {
      .name       = "omap2-nand",
      .id         = -1,
      .dev        = {
            .platform_data    = &overo_nand_data,
      },
      .num_resources    = 1,
      .resource   = &overo_nand_resource,
};


static void __init overo_flash_init(void)
{
      u8 cs = 0;
      u8 nandcs = GPMC_CS_NUM + 1;

      u32 gpmc_base_add = OMAP34XX_GPMC_VIRT;

      /* find out the chip-select on which NAND exists */
      while (cs < GPMC_CS_NUM) {
            u32 ret = 0;
            ret = gpmc_cs_read_reg(cs, GPMC_CS_CONFIG1);

            if ((ret & 0xC00) == 0x800) {
                  printk(KERN_INFO "Found NAND on CS%d\n", cs);
                  if (nandcs > GPMC_CS_NUM)
                        nandcs = cs;
            }
            cs++;
      }

      if (nandcs > GPMC_CS_NUM) {
            printk(KERN_INFO "NAND: Unable to find configuration "
                         "in GPMC\n ");
            return;
      }

      if (nandcs < GPMC_CS_NUM) {
            overo_nand_data.cs = nandcs;
            overo_nand_data.gpmc_cs_baseaddr = (void *)
                  (gpmc_base_add + GPMC_CS0_BASE + nandcs * GPMC_CS_SIZE);
            overo_nand_data.gpmc_baseaddr = (void *) (gpmc_base_add);

            printk(KERN_INFO "Registering NAND on CS%d\n", nandcs);
            if (platform_device_register(&overo_nand_device) < 0)
                  printk(KERN_ERR "Unable to register NAND device\n");
      }
}
static struct omap_uart_config overo_uart_config __initdata = {
      .enabled_uarts    = ((1 << 0) | (1 << 1) | (1 << 2)),
};

static int __init overo_i2c_init(void)
{
      /* i2c2 pins are used for gpio */
      omap_register_i2c_bus(3, 400, NULL, 0);
      return 0;
}

static void __init overo_init_irq(void)
{
      omap2_init_common_hw();
      omap_init_irq();
      omap_gpio_init();
}

static struct platform_device overo_lcd_device = {
      .name       = "overo_lcd",
      .id         = -1,
};

static struct omap_lcd_config overo_lcd_config __initdata = {
      .ctrl_name  = "internal",
};

static struct omap_board_config_kernel overo_config[] __initdata = {
      { OMAP_TAG_UART,  &overo_uart_config },
      { OMAP_TAG_LCD,         &overo_lcd_config },
};

static struct platform_device *overo_devices[] __initdata = {
      &overo_lcd_device,
};

static void __init overo_init(void)
{
      overo_i2c_init();
      platform_add_devices(overo_devices, ARRAY_SIZE(overo_devices));
      omap_board_config = overo_config;
      omap_board_config_size = ARRAY_SIZE(overo_config);
      omap_serial_init();
      overo_flash_init();

      if ((gpio_request(OVERO_GPIO_W2W_NRESET,
                    "OVERO_GPIO_W2W_NRESET") == 0) &&
          (gpio_direction_output(OVERO_GPIO_W2W_NRESET, 1) == 0)) {
            gpio_export(OVERO_GPIO_W2W_NRESET, 0);
            gpio_set_value(OVERO_GPIO_W2W_NRESET, 0);
            udelay(10);
            gpio_set_value(OVERO_GPIO_W2W_NRESET, 1);
      } else {
            printk(KERN_ERR "could not obtain gpio for "
                              "OVERO_GPIO_W2W_NRESET\n");
      }

      if ((gpio_request(OVERO_GPIO_BT_XGATE, "OVERO_GPIO_BT_XGATE") == 0) &&
          (gpio_direction_output(OVERO_GPIO_BT_XGATE, 0) == 0))
            gpio_export(OVERO_GPIO_BT_XGATE, 0);
      else
            printk(KERN_ERR "could not obtain gpio for OVERO_GPIO_BT_XGATE\n");

      if ((gpio_request(OVERO_GPIO_BT_NRESET, "OVERO_GPIO_BT_NRESET") == 0) &&
          (gpio_direction_output(OVERO_GPIO_BT_NRESET, 1) == 0)) {
            gpio_export(OVERO_GPIO_BT_NRESET, 0);
            gpio_set_value(OVERO_GPIO_BT_NRESET, 0);
            mdelay(6);
            gpio_set_value(OVERO_GPIO_BT_NRESET, 1);
      } else {
            printk(KERN_ERR "could not obtain gpio for "
                              "OVERO_GPIO_BT_NRESET\n");
      }

      if ((gpio_request(OVERO_GPIO_USBH_CPEN, "OVERO_GPIO_USBH_CPEN") == 0) &&
          (gpio_direction_output(OVERO_GPIO_USBH_CPEN, 1) == 0))
            gpio_export(OVERO_GPIO_USBH_CPEN, 0);
      else
            printk(KERN_ERR "could not obtain gpio for "
                              "OVERO_GPIO_USBH_CPEN\n");

      if ((gpio_request(OVERO_GPIO_USBH_NRESET,
                    "OVERO_GPIO_USBH_NRESET") == 0) &&
          (gpio_direction_output(OVERO_GPIO_USBH_NRESET, 1) == 0))
            gpio_export(OVERO_GPIO_USBH_NRESET, 0);
      else
            printk(KERN_ERR "could not obtain gpio for "
                              "OVERO_GPIO_USBH_NRESET\n");
}

static void __init overo_map_io(void)
{
      omap2_set_globals_343x();
      omap2_map_common_io();
}

MACHINE_START(OVERO, "Gumstix Overo")
      .phys_io    = 0x48000000,
      .io_pg_offst      = ((0xd8000000) >> 18) & 0xfffc,
      .boot_params      = 0x80000100,
      .map_io           = overo_map_io,
      .init_irq   = overo_init_irq,
      .init_machine     = overo_init,
      .timer            = &omap_timer,
MACHINE_END

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