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board-nokia770.c

/*
 * linux/arch/arm/mach-omap1/board-nokia770.c
 *
 * Modified from board-generic.c
 *
 * 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.
 */

#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/platform_device.h>
#include <linux/input.h>
#include <linux/clk.h>

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

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

#include <asm/arch/gpio.h>
#include <asm/arch/mux.h>
#include <asm/arch/usb.h>
#include <asm/arch/board.h>
#include <asm/arch/keypad.h>
#include <asm/arch/common.h>
#include <asm/arch/dsp_common.h>
#include <asm/arch/aic23.h>
#include <asm/arch/gpio.h>

static void __init omap_nokia770_init_irq(void)
{
      /* On Nokia 770, the SleepX signal is masked with an
       * MPUIO line by default.  It has to be unmasked for it
       * to become functional */

      /* SleepX mask direction */
      omap_writew((omap_readw(0xfffb5008) & ~2), 0xfffb5008);
      /* Unmask SleepX signal */
      omap_writew((omap_readw(0xfffb5004) & ~2), 0xfffb5004);

      omap1_init_common_hw();
      omap_init_irq();
}

static int nokia770_keymap[] = {
      KEY(0, 1, GROUP_0 | KEY_UP),
      KEY(0, 2, GROUP_1 | KEY_F5),
      KEY(1, 0, GROUP_0 | KEY_LEFT),
      KEY(1, 1, GROUP_0 | KEY_ENTER),
      KEY(1, 2, GROUP_0 | KEY_RIGHT),
      KEY(2, 0, GROUP_1 | KEY_ESC),
      KEY(2, 1, GROUP_0 | KEY_DOWN),
      KEY(2, 2, GROUP_1 | KEY_F4),
      KEY(3, 0, GROUP_2 | KEY_F7),
      KEY(3, 1, GROUP_2 | KEY_F8),
      KEY(3, 2, GROUP_2 | KEY_F6),
      0
};

static struct resource nokia770_kp_resources[] = {
      [0] = {
            .start      = INT_KEYBOARD,
            .end  = INT_KEYBOARD,
            .flags      = IORESOURCE_IRQ,
      },
};

static struct omap_kp_platform_data nokia770_kp_data = {
      .rows   = 8,
      .cols   = 8,
      .keymap = nokia770_keymap
};

static struct platform_device nokia770_kp_device = {
      .name       = "omap-keypad",
      .id         = -1,
      .dev        = {
            .platform_data = &nokia770_kp_data,
      },
      .num_resources    = ARRAY_SIZE(nokia770_kp_resources),
      .resource   = nokia770_kp_resources,
};

static struct platform_device *nokia770_devices[] __initdata = {
        &nokia770_kp_device,
};

static struct ads7846_platform_data nokia770_ads7846_platform_data __initdata = {
      .x_max            = 0x0fff,
      .y_max            = 0x0fff,
      .x_plate_ohms     = 180,
      .pressure_max     = 255,
      .debounce_max     = 10,
      .debounce_tol     = 3,
};

static struct spi_board_info nokia770_spi_board_info[] __initdata = {
      [0] = {
            .modalias       = "lcd_lph8923",
            .bus_num        = 2,
            .chip_select    = 3,
            .max_speed_hz   = 12000000,
      },
      [1] = {
            .modalias       = "ads7846",
            .bus_num        = 2,
            .chip_select    = 0,
            .max_speed_hz   = 2500000,
            .irq        = OMAP_GPIO_IRQ(15),
            .platform_data    = &nokia770_ads7846_platform_data,
      },
};


/* assume no Mini-AB port */

static struct omap_usb_config nokia770_usb_config __initdata = {
      .otg        = 1,
      .register_host    = 1,
      .register_dev     = 1,
      .hmc_mode   = 16,
      .pins[0]    = 6,
};

static struct omap_mmc_config nokia770_mmc_config __initdata = {
      .mmc[0] = {
            .enabled    = 0,
            .wire4            = 0,
            .wp_pin           = -1,
            .power_pin  = -1,
            .switch_pin = -1,
      },
      .mmc[1] = {
            .enabled    = 0,
            .wire4            = 0,
            .wp_pin           = -1,
            .power_pin  = -1,
            .switch_pin = -1,
      },
};

static struct omap_board_config_kernel nokia770_config[] = {
      { OMAP_TAG_USB,         NULL },
      { OMAP_TAG_MMC,         &nokia770_mmc_config },
};

/*
 * audio power control
 */
#define     HEADPHONE_GPIO          14
#define     AMPLIFIER_CTRL_GPIO     58

static struct clk *dspxor_ck;
static DECLARE_MUTEX(audio_pwr_sem);
/*
 * audio_pwr_state
 * +--+-------------------------+---------------------------------------+
 * |-1|down             |power-up request -> 0              |
 * +--+-------------------------+---------------------------------------+
 * | 0|up               |power-down(1) request -> 1         |
 * |  |                       |power-down(2) request -> (ignore)  |
 * +--+-------------------------+---------------------------------------+
 * | 1|up,              |power-up request -> 0              |
 * |  |received down(1) request     |power-down(2) request -> -1        |
 * +--+-------------------------+---------------------------------------+
 */
static int audio_pwr_state = -1;

/*
 * audio_pwr_up / down should be called under audio_pwr_sem
 */
static void nokia770_audio_pwr_up(void)
{
      clk_enable(dspxor_ck);

      /* Turn on codec */
      tlv320aic23_power_up();

      if (omap_get_gpio_datain(HEADPHONE_GPIO))
            /* HP not connected, turn on amplifier */
            omap_set_gpio_dataout(AMPLIFIER_CTRL_GPIO, 1);
      else
            /* HP connected, do not turn on amplifier */
            printk("HP connected\n");
}

static void codec_delayed_power_down(void *arg)
{
      down(&audio_pwr_sem);
      if (audio_pwr_state == -1)
            tlv320aic23_power_down();
      clk_disable(dspxor_ck);
      up(&audio_pwr_sem);
}

static DECLARE_WORK(codec_power_down_work, codec_delayed_power_down, NULL);

static void nokia770_audio_pwr_down(void)
{
      /* Turn off amplifier */
      omap_set_gpio_dataout(AMPLIFIER_CTRL_GPIO, 0);

      /* Turn off codec: schedule delayed work */
      schedule_delayed_work(&codec_power_down_work, HZ / 20);     /* 50ms */
}

void nokia770_audio_pwr_up_request(int stage)
{
      down(&audio_pwr_sem);
      if (audio_pwr_state == -1)
            nokia770_audio_pwr_up();
      /* force audio_pwr_state = 0, even if it was 1. */
      audio_pwr_state = 0;
      up(&audio_pwr_sem);
}

void nokia770_audio_pwr_down_request(int stage)
{
      down(&audio_pwr_sem);
      switch (stage) {
      case 1:
            if (audio_pwr_state == 0)
                  audio_pwr_state = 1;
            break;
      case 2:
            if (audio_pwr_state == 1) {
                  nokia770_audio_pwr_down();
                  audio_pwr_state = -1;
            }
            break;
      }
      up(&audio_pwr_sem);
}

static void __init omap_nokia770_init(void)
{
      nokia770_config[0].data = &nokia770_usb_config;

      platform_add_devices(nokia770_devices, ARRAY_SIZE(nokia770_devices));
      spi_register_board_info(nokia770_spi_board_info,
                        ARRAY_SIZE(nokia770_spi_board_info));
      omap_board_config = nokia770_config;
      omap_board_config_size = ARRAY_SIZE(nokia770_config);
      omap_serial_init();
      omap_dsp_audio_pwr_up_request = nokia770_audio_pwr_up_request;
      omap_dsp_audio_pwr_down_request = nokia770_audio_pwr_down_request;
      dspxor_ck = clk_get(0, "dspxor_ck");
}

static void __init omap_nokia770_map_io(void)
{
      omap1_map_common_io();
}

MACHINE_START(NOKIA770, "Nokia 770")
      .phys_io    = 0xfff00000,
      .io_pg_offst      = ((0xfef00000) >> 18) & 0xfffc,
      .boot_params      = 0x10000100,
      .map_io           = omap_nokia770_map_io,
      .init_irq   = omap_nokia770_init_irq,
      .init_machine     = omap_nokia770_init,
      .timer            = &omap_timer,
MACHINE_END

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