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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/i2c/twl.h>
#include <linux/regulator/machine.h>

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

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

#include <plat/board.h>
#include <plat/common.h>
#include <mach/gpio.h>
#include <plat/gpmc.h>
#include <mach/hardware.h>
#include <plat/nand.h>
#include <plat/usb.h>

#include "mux.h"
#include "sdram-micron-mt46h32m32lf-6.h"
#include "hsmmc.h"

#define OVERO_GPIO_BT_XGATE   15
#define OVERO_GPIO_W2W_NRESET 16
#define OVERO_GPIO_PENDOWN    114
#define OVERO_GPIO_BT_NRESET  164
#define OVERO_GPIO_USBH_CPEN  168
#define OVERO_GPIO_USBH_NRESET      183

#define NAND_BLOCK_SIZE SZ_128K

#define OVERO_SMSC911X_CS      5
#define OVERO_SMSC911X_GPIO    176
#define OVERO_SMSC911X2_CS     4
#define OVERO_SMSC911X2_GPIO   65

#if defined(CONFIG_TOUCHSCREEN_ADS7846) || \
      defined(CONFIG_TOUCHSCREEN_ADS7846_MODULE)

#include <plat/mcspi.h>
#include <linux/spi/spi.h>
#include <linux/spi/ads7846.h>

static struct omap2_mcspi_device_config ads7846_mcspi_config = {
      .turbo_mode = 0,
      .single_channel   = 1,  /* 0: slave, 1: master */
};

static int ads7846_get_pendown_state(void)
{
      return !gpio_get_value(OVERO_GPIO_PENDOWN);
}

static struct ads7846_platform_data ads7846_config = {
      .x_max                  = 0x0fff,
      .y_max                  = 0x0fff,
      .x_plate_ohms           = 180,
      .pressure_max           = 255,
      .debounce_max           = 10,
      .debounce_tol           = 3,
      .debounce_rep           = 1,
      .get_pendown_state      = ads7846_get_pendown_state,
      .keep_vref_on           = 1,
};

static struct spi_board_info overo_spi_board_info[] __initdata = {
      {
            .modalias         = "ads7846",
            .bus_num          = 1,
            .chip_select            = 0,
            .max_speed_hz           = 1500000,
            .controller_data  = &ads7846_mcspi_config,
            .irq              = OMAP_GPIO_IRQ(OVERO_GPIO_PENDOWN),
            .platform_data          = &ads7846_config,
      }
};

static void __init overo_ads7846_init(void)
{
      if ((gpio_request(OVERO_GPIO_PENDOWN, "ADS7846_PENDOWN") == 0) &&
          (gpio_direction_input(OVERO_GPIO_PENDOWN) == 0)) {
            gpio_export(OVERO_GPIO_PENDOWN, 0);
      } else {
            printk(KERN_ERR "could not obtain gpio for ADS7846_PENDOWN\n");
            return;
      }

      spi_register_board_info(overo_spi_board_info,
                  ARRAY_SIZE(overo_spi_board_info));
}

#else
static inline void __init overo_ads7846_init(void) { return; }
#endif

#if defined(CONFIG_SMSC911X) || defined(CONFIG_SMSC911X_MODULE)

#include <linux/smsc911x.h>

static struct resource overo_smsc911x_resources[] = {
      {
            .name = "smsc911x-memory",
            .flags      = IORESOURCE_MEM,
      },
      {
            .flags      = IORESOURCE_IRQ | IORESOURCE_IRQ_LOWLEVEL,
      },
};

static struct resource overo_smsc911x2_resources[] = {
      {
            .name = "smsc911x2-memory",
            .flags      = IORESOURCE_MEM,
      },
      {
            .flags      = IORESOURCE_IRQ | IORESOURCE_IRQ_LOWLEVEL,
      },
};

static struct smsc911x_platform_config overo_smsc911x_config = {
      .irq_polarity     = SMSC911X_IRQ_POLARITY_ACTIVE_LOW,
      .irq_type   = SMSC911X_IRQ_TYPE_OPEN_DRAIN,
      .flags            = SMSC911X_USE_32BIT ,
      .phy_interface    = PHY_INTERFACE_MODE_MII,
};

static struct platform_device overo_smsc911x_device = {
      .name       = "smsc911x",
      .id         = 0,
      .num_resources    = ARRAY_SIZE(overo_smsc911x_resources),
      .resource   = overo_smsc911x_resources,
      .dev        = {
            .platform_data = &overo_smsc911x_config,
      },
};

static struct platform_device overo_smsc911x2_device = {
      .name       = "smsc911x",
      .id         = 1,
      .num_resources    = ARRAY_SIZE(overo_smsc911x2_resources),
      .resource   = overo_smsc911x2_resources,
      .dev        = {
            .platform_data = &overo_smsc911x_config,
      },
};

static struct platform_device *smsc911x_devices[] = {
      &overo_smsc911x_device,
      &overo_smsc911x2_device,
};

static inline void __init overo_init_smsc911x(void)
{
      unsigned long cs_mem_base, cs_mem_base2;

      /* set up first smsc911x chip */

      if (gpmc_cs_request(OVERO_SMSC911X_CS, SZ_16M, &cs_mem_base) < 0) {
            printk(KERN_ERR "Failed request for GPMC mem for smsc911x\n");
            return;
      }

      overo_smsc911x_resources[0].start = cs_mem_base + 0x0;
      overo_smsc911x_resources[0].end   = cs_mem_base + 0xff;

      if ((gpio_request(OVERO_SMSC911X_GPIO, "SMSC911X IRQ") == 0) &&
          (gpio_direction_input(OVERO_SMSC911X_GPIO) == 0)) {
            gpio_export(OVERO_SMSC911X_GPIO, 0);
      } else {
            printk(KERN_ERR "could not obtain gpio for SMSC911X IRQ\n");
            return;
      }

      overo_smsc911x_resources[1].start = OMAP_GPIO_IRQ(OVERO_SMSC911X_GPIO);
      overo_smsc911x_resources[1].end       = 0;

      /* set up second smsc911x chip */

      if (gpmc_cs_request(OVERO_SMSC911X2_CS, SZ_16M, &cs_mem_base2) < 0) {
            printk(KERN_ERR "Failed request for GPMC mem for smsc911x2\n");
            return;
      }

      overo_smsc911x2_resources[0].start = cs_mem_base2 + 0x0;
      overo_smsc911x2_resources[0].end   = cs_mem_base2 + 0xff;

      if ((gpio_request(OVERO_SMSC911X2_GPIO, "SMSC911X2 IRQ") == 0) &&
          (gpio_direction_input(OVERO_SMSC911X2_GPIO) == 0)) {
            gpio_export(OVERO_SMSC911X2_GPIO, 0);
      } else {
            printk(KERN_ERR "could not obtain gpio for SMSC911X2 IRQ\n");
            return;
      }

      overo_smsc911x2_resources[1].start = OMAP_GPIO_IRQ(OVERO_SMSC911X2_GPIO);
      overo_smsc911x2_resources[1].end   = 0;

      platform_add_devices(smsc911x_devices, ARRAY_SIZE(smsc911x_devices));
}

#else
static inline void __init overo_init_smsc911x(void) { return; }
#endif

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

      /* 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;

            printk(KERN_INFO "Registering NAND on CS%d\n", nandcs);
            if (gpmc_nand_init(&overo_nand_data) < 0)
                  printk(KERN_ERR "Unable to register NAND device\n");
      }
}

static struct omap2_hsmmc_info mmc[] = {
      {
            .mmc        = 1,
            .caps       = MMC_CAP_4_BIT_DATA,
            .gpio_cd    = -EINVAL,
            .gpio_wp    = -EINVAL,
      },
      {
            .mmc        = 2,
            .caps       = MMC_CAP_4_BIT_DATA,
            .gpio_cd    = -EINVAL,
            .gpio_wp    = -EINVAL,
            .transceiver      = true,
            .ocr_mask   = 0x00100000,     /* 3.3V */
      },
      {}    /* Terminator */
};

static struct regulator_consumer_supply overo_vmmc1_supply = {
      .supply                 = "vmmc",
};

static int overo_twl_gpio_setup(struct device *dev,
            unsigned gpio, unsigned ngpio)
{
      omap2_hsmmc_init(mmc);

      overo_vmmc1_supply.dev = mmc[0].dev;

      return 0;
}

static struct twl4030_gpio_platform_data overo_gpio_data = {
      .gpio_base  = OMAP_MAX_GPIO_LINES,
      .irq_base   = TWL4030_GPIO_IRQ_BASE,
      .irq_end    = TWL4030_GPIO_IRQ_END,
      .setup            = overo_twl_gpio_setup,
};

static struct twl4030_usb_data overo_usb_data = {
      .usb_mode   = T2_USB_MODE_ULPI,
};

static struct regulator_init_data overo_vmmc1 = {
      .constraints = {
            .min_uV                 = 1850000,
            .max_uV                 = 3150000,
            .valid_modes_mask = REGULATOR_MODE_NORMAL
                              | REGULATOR_MODE_STANDBY,
            .valid_ops_mask         = REGULATOR_CHANGE_VOLTAGE
                              | REGULATOR_CHANGE_MODE
                              | REGULATOR_CHANGE_STATUS,
      },
      .num_consumer_supplies  = 1,
      .consumer_supplies      = &overo_vmmc1_supply,
};

static struct twl4030_codec_audio_data overo_audio_data = {
      .audio_mclk = 26000000,
};

static struct twl4030_codec_data overo_codec_data = {
      .audio_mclk = 26000000,
      .audio = &overo_audio_data,
};

/* mmc2 (WLAN) and Bluetooth don't use twl4030 regulators */

static struct twl4030_platform_data overo_twldata = {
      .irq_base   = TWL4030_IRQ_BASE,
      .irq_end    = TWL4030_IRQ_END,
      .gpio       = &overo_gpio_data,
      .usb        = &overo_usb_data,
      .codec            = &overo_codec_data,
      .vmmc1            = &overo_vmmc1,
};

static struct i2c_board_info __initdata overo_i2c_boardinfo[] = {
      {
            I2C_BOARD_INFO("tps65950", 0x48),
            .flags = I2C_CLIENT_WAKE,
            .irq = INT_34XX_SYS_NIRQ,
            .platform_data = &overo_twldata,
      },
};

static int __init overo_i2c_init(void)
{
      omap_register_i2c_bus(1, 2600, overo_i2c_boardinfo,
                  ARRAY_SIZE(overo_i2c_boardinfo));
      /* i2c2 pins are used for gpio */
      omap_register_i2c_bus(3, 400, NULL, 0);
      return 0;
}

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_LCD,         &overo_lcd_config },
};

static void __init overo_init_irq(void)
{
      omap_board_config = overo_config;
      omap_board_config_size = ARRAY_SIZE(overo_config);
      omap2_init_common_infrastructure();
      omap2_init_common_devices(mt46h32m32lf6_sdrc_params,
                          mt46h32m32lf6_sdrc_params);
      omap_init_irq();
}

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

static const struct ehci_hcd_omap_platform_data ehci_pdata __initconst = {
      .port_mode[0] = EHCI_HCD_OMAP_MODE_UNKNOWN,
      .port_mode[1] = EHCI_HCD_OMAP_MODE_PHY,
      .port_mode[2] = EHCI_HCD_OMAP_MODE_UNKNOWN,

      .phy_reset  = true,
      .reset_gpio_port[0]  = -EINVAL,
      .reset_gpio_port[1]  = OVERO_GPIO_USBH_NRESET,
      .reset_gpio_port[2]  = -EINVAL
};

#ifdef CONFIG_OMAP_MUX
static struct omap_board_mux board_mux[] __initdata = {
      { .reg_offset = OMAP_MUX_TERMINATOR },
};
#endif

static struct omap_musb_board_data musb_board_data = {
      .interface_type         = MUSB_INTERFACE_ULPI,
      .mode             = MUSB_OTG,
      .power                  = 100,
};

static void __init overo_init(void)
{
      omap3_mux_init(board_mux, OMAP_PACKAGE_CBB);
      overo_i2c_init();
      platform_add_devices(overo_devices, ARRAY_SIZE(overo_devices));
      omap_serial_init();
      overo_flash_init();
      usb_musb_init(&musb_board_data);
      usb_ehci_init(&ehci_pdata);
      overo_ads7846_init();
      overo_init_smsc911x();

      /* Ensure SDRC pins are mux'd for self-refresh */
      omap_mux_init_signal("sdrc_cke0", OMAP_PIN_OUTPUT);
      omap_mux_init_signal("sdrc_cke1", OMAP_PIN_OUTPUT);

      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");
}

MACHINE_START(OVERO, "Gumstix Overo")
      .boot_params      = 0x80000100,
      .map_io           = omap3_map_io,
      .reserve    = omap_reserve,
      .init_irq   = overo_init_irq,
      .init_machine     = overo_init,
      .timer            = &omap_timer,
MACHINE_END

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