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stmp378x_devb.c

/*
 * Freescale STMP378X development board support
 *
 * Embedded Alley Solutions, Inc <source@embeddedalley.com>
 *
 * Copyright 2008 Freescale Semiconductor, Inc. All Rights Reserved.
 * Copyright 2008 Embedded Alley Solutions, Inc All Rights Reserved.
 */

/*
 * The code contained herein is licensed under the GNU General Public
 * License. You may obtain a copy of the GNU General Public License
 * Version 2 or later at the following locations:
 *
 * http://www.opensource.org/licenses/gpl-license.html
 * http://www.gnu.org/copyleft/gpl.html
 */
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/io.h>
#include <linux/platform_device.h>
#include <linux/delay.h>
#include <linux/clk.h>
#include <linux/err.h>
#include <linux/spi/spi.h>

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

#include <mach/pins.h>
#include <mach/pinmux.h>
#include <mach/platform.h>
#include <mach/stmp3xxx.h>
#include <mach/mmc.h>
#include <mach/gpmi.h>

#include "stmp378x.h"

static struct platform_device *devices[] = {
      &stmp3xxx_dbguart,
      &stmp3xxx_appuart,
      &stmp3xxx_watchdog,
      &stmp3xxx_touchscreen,
      &stmp3xxx_rtc,
      &stmp3xxx_keyboard,
      &stmp3xxx_framebuffer,
      &stmp3xxx_backlight,
      &stmp3xxx_rotdec,
      &stmp3xxx_persistent,
      &stmp3xxx_dcp_bootstream,
      &stmp3xxx_dcp,
      &stmp3xxx_battery,
      &stmp378x_pxp,
      &stmp378x_i2c,
};

static struct pin_desc i2c_pins_desc[] = {
      { PINID_I2C_SCL, PIN_FUN1, PIN_4MA, PIN_3_3V, 0 },
      { PINID_I2C_SDA, PIN_FUN1, PIN_4MA, PIN_3_3V, 0 },
};

static struct pin_group i2c_pins = {
      .pins       = i2c_pins_desc,
      .nr_pins    = ARRAY_SIZE(i2c_pins_desc),
};

static struct pin_desc dbguart_pins_0[] = {
      { PINID_PWM0, PIN_FUN3, },
      { PINID_PWM1, PIN_FUN3, },
};

static struct pin_group dbguart_pins[] = {
      [0] = {
            .pins       = dbguart_pins_0,
            .nr_pins    = ARRAY_SIZE(dbguart_pins_0),
      },
};

static int dbguart_pins_control(int id, int request)
{
      int r = 0;

      if (request)
            r = stmp3xxx_request_pin_group(&dbguart_pins[id], "debug uart");
      else
            stmp3xxx_release_pin_group(&dbguart_pins[id], "debug uart");
      return r;
}

static struct pin_desc appuart_pins_0[] = {
      { PINID_AUART1_CTS, PIN_FUN1, PIN_4MA, PIN_1_8V, 0, },
      { PINID_AUART1_RTS, PIN_FUN1, PIN_4MA, PIN_1_8V, 0, },
      { PINID_AUART1_RX, PIN_FUN1, PIN_4MA, PIN_1_8V, 0, },
      { PINID_AUART1_TX, PIN_FUN1, PIN_4MA, PIN_1_8V, 0, },
};

static struct pin_desc appuart_pins_1[] = {
#if 0 /* enable these when second appuart will be connected */
      { PINID_AUART2_CTS, PIN_FUN1, PIN_4MA, PIN_1_8V, 0, },
      { PINID_AUART2_RTS, PIN_FUN1, PIN_4MA, PIN_1_8V, 0, },
      { PINID_AUART2_RX, PIN_FUN1, PIN_4MA, PIN_1_8V, 0, },
      { PINID_AUART2_TX, PIN_FUN1, PIN_4MA, PIN_1_8V, 0, },
#endif
};

static struct pin_desc mmc_pins_desc[] = {
      { PINID_SSP1_DATA0, PIN_FUN1, PIN_8MA, PIN_3_3V, 1 },
      { PINID_SSP1_DATA1, PIN_FUN1, PIN_8MA, PIN_3_3V, 1 },
      { PINID_SSP1_DATA2, PIN_FUN1, PIN_8MA, PIN_3_3V, 1 },
      { PINID_SSP1_DATA3, PIN_FUN1, PIN_8MA, PIN_3_3V, 1 },
      { PINID_SSP1_CMD, PIN_FUN1, PIN_8MA, PIN_3_3V, 1 },
      { PINID_SSP1_SCK, PIN_FUN1, PIN_8MA, PIN_3_3V, 0 },
      { PINID_SSP1_DETECT, PIN_FUN1, PIN_8MA, PIN_3_3V, 0 },
};

static struct pin_group mmc_pins = {
      .pins       = mmc_pins_desc,
      .nr_pins    = ARRAY_SIZE(mmc_pins_desc),
};

static int stmp3xxxmmc_get_wp(void)
{
      return gpio_get_value(PINID_PWM4);
}

static int stmp3xxxmmc_hw_init_ssp1(void)
{
      int ret;

      ret = stmp3xxx_request_pin_group(&mmc_pins, "mmc");
      if (ret)
            goto out;

      /* Configure write protect GPIO pin */
      ret = gpio_request(PINID_PWM4, "mmc wp");
      if (ret)
            goto out_wp;

      gpio_direction_input(PINID_PWM4);

      /* Configure POWER pin as gpio to drive power to MMC slot */
      ret = gpio_request(PINID_PWM3, "mmc power");
      if (ret)
            goto out_power;

      gpio_direction_output(PINID_PWM3, 0);
      mdelay(100);

      return 0;

out_power:
      gpio_free(PINID_PWM4);
out_wp:
      stmp3xxx_release_pin_group(&mmc_pins, "mmc");
out:
      return ret;
}

static void stmp3xxxmmc_hw_release_ssp1(void)
{
      gpio_free(PINID_PWM3);
      gpio_free(PINID_PWM4);
      stmp3xxx_release_pin_group(&mmc_pins, "mmc");
}

static void stmp3xxxmmc_cmd_pullup_ssp1(int enable)
{
      stmp3xxx_pin_pullup(PINID_SSP1_CMD, enable, "mmc");
}

static unsigned long
stmp3xxxmmc_setclock_ssp1(void __iomem *base, unsigned long hz)
{
      struct clk *ssp, *parent;
      char *p;
      long r;

      ssp = clk_get(NULL, "ssp");

      /* using SSP1, no timeout, clock rate 1 */
      writel(BF(2, SSP_TIMING_CLOCK_DIVIDE) |
             BF(0xFFFF, SSP_TIMING_TIMEOUT),
             base + HW_SSP_TIMING);

      p = (hz > 1000000) ? "io" : "osc_24M";
      parent = clk_get(NULL, p);
      clk_set_parent(ssp, parent);
      r = clk_set_rate(ssp, 2 * hz / 1000);
      clk_put(parent);
      clk_put(ssp);

      return hz;
}

static struct stmp3xxxmmc_platform_data mmc_data = {
      .hw_init    = stmp3xxxmmc_hw_init_ssp1,
      .hw_release = stmp3xxxmmc_hw_release_ssp1,
      .get_wp           = stmp3xxxmmc_get_wp,
      .cmd_pullup = stmp3xxxmmc_cmd_pullup_ssp1,
      .setclock   = stmp3xxxmmc_setclock_ssp1,
};


static struct pin_group appuart_pins[] = {
      [0] = {
            .pins       = appuart_pins_0,
            .nr_pins    = ARRAY_SIZE(appuart_pins_0),
      },
      [1] = {
            .pins       = appuart_pins_1,
            .nr_pins    = ARRAY_SIZE(appuart_pins_1),
      },
};

static struct pin_desc ssp1_pins_desc[] = {
      { PINID_SSP1_SCK, PIN_FUN1, PIN_8MA, PIN_3_3V, 0, },
      { PINID_SSP1_CMD, PIN_FUN1, PIN_4MA, PIN_3_3V, 0, },
      { PINID_SSP1_DATA0,     PIN_FUN1, PIN_4MA, PIN_3_3V, 0, },
      { PINID_SSP1_DATA3,     PIN_FUN1, PIN_4MA, PIN_3_3V, 0, },
};

static struct pin_desc ssp2_pins_desc[] = {
      { PINID_GPMI_WRN, PIN_FUN3, PIN_8MA, PIN_3_3V, 0, },
      { PINID_GPMI_RDY1,      PIN_FUN3, PIN_4MA, PIN_3_3V, 0, },
      { PINID_GPMI_D00, PIN_FUN3, PIN_4MA, PIN_3_3V, 0, },
      { PINID_GPMI_D03, PIN_FUN3, PIN_4MA, PIN_3_3V, 0, },
};

static struct pin_group ssp1_pins = {
      .pins = ssp1_pins_desc,
      .nr_pins = ARRAY_SIZE(ssp1_pins_desc),
};

static struct pin_group ssp2_pins = {
      .pins = ssp1_pins_desc,
      .nr_pins = ARRAY_SIZE(ssp2_pins_desc),
};

static struct pin_desc gpmi_pins_desc[] = {
      { PINID_GPMI_CE0N, PIN_FUN1, PIN_4MA, PIN_3_3V, 0 },
      { PINID_GPMI_CE1N, PIN_FUN1, PIN_4MA, PIN_3_3V, 0 },
      { PINID_GMPI_CE2N, PIN_FUN1, PIN_4MA, PIN_3_3V, 0 },
      { PINID_GPMI_CLE, PIN_FUN1, PIN_4MA, PIN_3_3V, 0 },
      { PINID_GPMI_ALE, PIN_FUN1, PIN_4MA, PIN_3_3V, 0 },
      { PINID_GPMI_WPN, PIN_FUN1, PIN_12MA, PIN_3_3V, 0 },
      { PINID_GPMI_RDY1, PIN_FUN1, PIN_4MA, PIN_3_3V, 0 },
      { PINID_GPMI_D00, PIN_FUN1, PIN_4MA, PIN_3_3V, 0 },
      { PINID_GPMI_D01, PIN_FUN1, PIN_4MA, PIN_3_3V, 0 },
      { PINID_GPMI_D02, PIN_FUN1, PIN_4MA, PIN_3_3V, 0 },
      { PINID_GPMI_D03, PIN_FUN1, PIN_4MA, PIN_3_3V, 0 },
      { PINID_GPMI_D04, PIN_FUN1, PIN_4MA, PIN_3_3V, 0 },
      { PINID_GPMI_D05, PIN_FUN1, PIN_4MA, PIN_3_3V, 0 },
      { PINID_GPMI_D06, PIN_FUN1, PIN_4MA, PIN_3_3V, 0 },
      { PINID_GPMI_D07, PIN_FUN1, PIN_4MA, PIN_3_3V, 0 },
      { PINID_GPMI_RDY0, PIN_FUN1, PIN_4MA, PIN_3_3V, 0 },
      { PINID_GPMI_RDY2, PIN_FUN1, PIN_4MA, PIN_3_3V, 0 },
      { PINID_GPMI_RDY3, PIN_FUN1, PIN_4MA, PIN_3_3V, 0 },
      { PINID_GPMI_WRN, PIN_FUN1, PIN_12MA, PIN_3_3V, 0 },
      { PINID_GPMI_RDN, PIN_FUN1, PIN_12MA, PIN_3_3V, 0 },
};

static struct pin_group gpmi_pins = {
      .pins       = gpmi_pins_desc,
      .nr_pins    = ARRAY_SIZE(gpmi_pins_desc),
};

static struct mtd_partition gpmi_partitions[] = {
      [0] = {
            .name = "boot",
            .size = 10 * SZ_1M,
            .offset     = 0,
      },
      [1] = {
            .name = "data",
            .size = MTDPART_SIZ_FULL,
            .offset     = MTDPART_OFS_APPEND,
      },
};

static struct gpmi_platform_data gpmi_data = {
      .pins = &gpmi_pins,
      .nr_parts = ARRAY_SIZE(gpmi_partitions),
      .parts = gpmi_partitions,
      .part_types = { "cmdline", NULL },
};

static struct spi_board_info spi_board_info[] __initdata = {
#if defined(CONFIG_ENC28J60) || defined(CONFIG_ENC28J60_MODULE)
      {
            .modalias       = "enc28j60",
            .max_speed_hz   = 6 * 1000 * 1000,
            .bus_num    = 1,
            .chip_select    = 0,
            .platform_data  = NULL,
      },
#endif
};

static void __init stmp378x_devb_init(void)
{
      stmp3xxx_pinmux_init(NR_REAL_IRQS);

      /* init stmp3xxx platform */
      stmp3xxx_init();

      stmp3xxx_dbguart.dev.platform_data = dbguart_pins_control;
      stmp3xxx_appuart.dev.platform_data = appuart_pins;
      stmp3xxx_mmc.dev.platform_data = &mmc_data;
      stmp3xxx_gpmi.dev.platform_data = &gpmi_data;
      stmp3xxx_spi1.dev.platform_data = &ssp1_pins;
      stmp3xxx_spi2.dev.platform_data = &ssp2_pins;
      stmp378x_i2c.dev.platform_data = &i2c_pins;

      /* register spi devices */
      spi_register_board_info(spi_board_info, ARRAY_SIZE(spi_board_info));

      /* add board's devices */
      platform_add_devices(devices, ARRAY_SIZE(devices));

      /* add devices selected by command line ssp1= and ssp2= options */
      stmp3xxx_ssp1_device_register();
      stmp3xxx_ssp2_device_register();
}

MACHINE_START(STMP378X, "STMP378X")
      .boot_params      = 0x40000100,
      .map_io           = stmp378x_map_io,
      .init_irq   = stmp378x_init_irq,
      .timer            = &stmp3xxx_timer,
      .init_machine     = stmp378x_devb_init,
MACHINE_END

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