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board-mop500-sdi.c

/*
 * Copyright (C) ST-Ericsson SA 2010
 *
 * Author: Hanumath Prasad <hanumath.prasad@stericsson.com>
 * License terms: GNU General Public License (GPL) version 2
 */

#include <linux/kernel.h>
#include <linux/gpio.h>
#include <linux/amba/bus.h>
#include <linux/amba/mmci.h>
#include <linux/mmc/host.h>
#include <linux/platform_device.h>

#include <plat/pincfg.h>
#include <mach/devices.h>
#include <mach/hardware.h>

#include "devices-db8500.h"
#include "pins-db8500.h"
#include "board-mop500.h"

static pin_cfg_t mop500_sdi_pins[] = {
      /* SDI0 (MicroSD slot) */
      GPIO18_MC0_CMDDIR,
      GPIO19_MC0_DAT0DIR,
      GPIO20_MC0_DAT2DIR,
      GPIO21_MC0_DAT31DIR,
      GPIO22_MC0_FBCLK,
      GPIO23_MC0_CLK,
      GPIO24_MC0_CMD,
      GPIO25_MC0_DAT0,
      GPIO26_MC0_DAT1,
      GPIO27_MC0_DAT2,
      GPIO28_MC0_DAT3,

      /* SDI4 (on-board eMMC) */
      GPIO197_MC4_DAT3,
      GPIO198_MC4_DAT2,
      GPIO199_MC4_DAT1,
      GPIO200_MC4_DAT0,
      GPIO201_MC4_CMD,
      GPIO202_MC4_FBCLK,
      GPIO203_MC4_CLK,
      GPIO204_MC4_DAT7,
      GPIO205_MC4_DAT6,
      GPIO206_MC4_DAT5,
      GPIO207_MC4_DAT4,
};

static pin_cfg_t mop500_sdi2_pins[] = {
      /* SDI2 (POP eMMC) */
      GPIO128_MC2_CLK,
      GPIO129_MC2_CMD,
      GPIO130_MC2_FBCLK,
      GPIO131_MC2_DAT0,
      GPIO132_MC2_DAT1,
      GPIO133_MC2_DAT2,
      GPIO134_MC2_DAT3,
      GPIO135_MC2_DAT4,
      GPIO136_MC2_DAT5,
      GPIO137_MC2_DAT6,
      GPIO138_MC2_DAT7,
};

/*
 * SDI 0 (MicroSD slot)
 */

/* MMCIPOWER bits */
#define MCI_DATA2DIREN        (1 << 2)
#define MCI_CMDDIREN          (1 << 3)
#define MCI_DATA0DIREN        (1 << 4)
#define MCI_DATA31DIREN       (1 << 5)
#define MCI_FBCLKEN           (1 << 7)

static u32 mop500_sdi0_vdd_handler(struct device *dev, unsigned int vdd,
                           unsigned char power_mode)
{
      if (power_mode == MMC_POWER_UP)
            gpio_set_value_cansleep(GPIO_SDMMC_EN, 1);
      else if (power_mode == MMC_POWER_OFF)
            gpio_set_value_cansleep(GPIO_SDMMC_EN, 0);

      return MCI_FBCLKEN | MCI_CMDDIREN | MCI_DATA0DIREN |
             MCI_DATA2DIREN | MCI_DATA31DIREN;
}

static struct mmci_platform_data mop500_sdi0_data = {
      .vdd_handler      = mop500_sdi0_vdd_handler,
      .ocr_mask   = MMC_VDD_29_30,
      .f_max            = 100000000,
      .capabilities     = MMC_CAP_4_BIT_DATA,
      .gpio_cd    = GPIO_SDMMC_CD,
      .gpio_wp    = -1,
};

void mop500_sdi_tc35892_init(void)
{
      int ret;

      ret = gpio_request(GPIO_SDMMC_EN, "SDMMC_EN");
      if (!ret)
            ret = gpio_request(GPIO_SDMMC_1V8_3V_SEL,
                           "GPIO_SDMMC_1V8_3V_SEL");
      if (ret)
            return;

      gpio_direction_output(GPIO_SDMMC_1V8_3V_SEL, 1);
      gpio_direction_output(GPIO_SDMMC_EN, 0);

      db8500_add_sdi0(&mop500_sdi0_data);
}

/*
 * SDI 2 (POP eMMC, not on DB8500ed)
 */

static struct mmci_platform_data mop500_sdi2_data = {
      .ocr_mask   = MMC_VDD_165_195,
      .f_max            = 100000000,
      .capabilities     = MMC_CAP_4_BIT_DATA | MMC_CAP_8_BIT_DATA,
      .gpio_cd    = -1,
      .gpio_wp    = -1,
};

/*
 * SDI 4 (on-board eMMC)
 */

static struct mmci_platform_data mop500_sdi4_data = {
      .ocr_mask   = MMC_VDD_29_30,
      .f_max            = 100000000,
      .capabilities     = MMC_CAP_4_BIT_DATA | MMC_CAP_8_BIT_DATA |
                    MMC_CAP_MMC_HIGHSPEED,
      .gpio_cd    = -1,
      .gpio_wp    = -1,
};

void __init mop500_sdi_init(void)
{
      nmk_config_pins(mop500_sdi_pins, ARRAY_SIZE(mop500_sdi_pins));

      /*
       * sdi0 will finally be added when the TC35892 initializes and calls
       * mop500_sdi_tc35892_init() above.
       */

      /* PoP:ed eMMC */
      if (!cpu_is_u8500ed()) {
            nmk_config_pins(mop500_sdi2_pins, ARRAY_SIZE(mop500_sdi2_pins));
            /* POP eMMC on v1.0 has problems with high speed */
            if (!cpu_is_u8500v10())
                  mop500_sdi2_data.capabilities |= MMC_CAP_MMC_HIGHSPEED;
            db8500_add_sdi2(&mop500_sdi2_data);
      }

      /* On-board eMMC */
      db8500_add_sdi4(&mop500_sdi4_data);
}

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