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z2.c

/*
 *  linux/arch/arm/mach-pxa/z2.c
 *
 *  Support for the Zipit Z2 Handheld device.
 *
 *  Copyright (C) 2009-2010 Marek Vasut <marek.vasut@gmail.com>
 *
 *  Based on research and code by: Ken McGuire
 *  Based on mainstone.c as modified for the Zipit Z2.
 *
 *  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/platform_device.h>
#include <linux/mtd/mtd.h>
#include <linux/mtd/partitions.h>
#include <linux/pwm_backlight.h>
#include <linux/z2_battery.h>
#include <linux/dma-mapping.h>
#include <linux/spi/spi.h>
#include <linux/spi/pxa2xx_spi.h>
#include <linux/spi/libertas_spi.h>
#include <linux/spi/lms283gf05.h>
#include <linux/power_supply.h>
#include <linux/mtd/physmap.h>
#include <linux/gpio.h>
#include <linux/gpio_keys.h>
#include <linux/delay.h>
#include <linux/regulator/machine.h>

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

#include <mach/pxa27x.h>
#include <mach/mfp-pxa27x.h>
#include <mach/z2.h>
#include <mach/pxafb.h>
#include <mach/mmc.h>
#include <plat/pxa27x_keypad.h>

#include <plat/i2c.h>

#include "generic.h"
#include "devices.h"

/******************************************************************************
 * Pin configuration
 ******************************************************************************/
static unsigned long z2_pin_config[] = {

      /* LCD - 16bpp Active TFT */
      GPIO58_LCD_LDD_0,
      GPIO59_LCD_LDD_1,
      GPIO60_LCD_LDD_2,
      GPIO61_LCD_LDD_3,
      GPIO62_LCD_LDD_4,
      GPIO63_LCD_LDD_5,
      GPIO64_LCD_LDD_6,
      GPIO65_LCD_LDD_7,
      GPIO66_LCD_LDD_8,
      GPIO67_LCD_LDD_9,
      GPIO68_LCD_LDD_10,
      GPIO69_LCD_LDD_11,
      GPIO70_LCD_LDD_12,
      GPIO71_LCD_LDD_13,
      GPIO72_LCD_LDD_14,
      GPIO73_LCD_LDD_15,
      GPIO74_LCD_FCLK,
      GPIO75_LCD_LCLK,
      GPIO76_LCD_PCLK,
      GPIO77_LCD_BIAS,
      GPIO19_GPIO,            /* LCD reset */
      GPIO88_GPIO,            /* LCD chipselect */

      /* PWM */
      GPIO115_PWM1_OUT, /* Keypad Backlight */
      GPIO11_PWM2_OUT,  /* LCD Backlight */

      /* MMC */
      GPIO32_MMC_CLK,
      GPIO112_MMC_CMD,
      GPIO92_MMC_DAT_0,
      GPIO109_MMC_DAT_1,
      GPIO110_MMC_DAT_2,
      GPIO111_MMC_DAT_3,
      GPIO96_GPIO,            /* SD detect */

      /* STUART */
      GPIO46_STUART_RXD,
      GPIO47_STUART_TXD,

      /* Keypad */
      GPIO100_KP_MKIN_0 | WAKEUP_ON_LEVEL_HIGH,
      GPIO101_KP_MKIN_1 | WAKEUP_ON_LEVEL_HIGH,
      GPIO102_KP_MKIN_2 | WAKEUP_ON_LEVEL_HIGH,
      GPIO34_KP_MKIN_3  | WAKEUP_ON_LEVEL_HIGH,
      GPIO38_KP_MKIN_4  | WAKEUP_ON_LEVEL_HIGH,
      GPIO16_KP_MKIN_5  | WAKEUP_ON_LEVEL_HIGH,
      GPIO17_KP_MKIN_6  | WAKEUP_ON_LEVEL_HIGH,
      GPIO103_KP_MKOUT_0,
      GPIO104_KP_MKOUT_1,
      GPIO105_KP_MKOUT_2,
      GPIO106_KP_MKOUT_3,
      GPIO107_KP_MKOUT_4,
      GPIO108_KP_MKOUT_5,
      GPIO35_KP_MKOUT_6,
      GPIO41_KP_MKOUT_7,

      /* I2C */
      GPIO117_I2C_SCL,
      GPIO118_I2C_SDA,

      /* SSP1 */
      GPIO23_SSP1_SCLK, /* SSP1_SCK */
      GPIO25_SSP1_TXD,  /* SSP1_TXD */
      GPIO26_SSP1_RXD,  /* SSP1_RXD */

      /* SSP2 */
      GPIO22_SSP2_SCLK, /* SSP2_SCK */
      GPIO13_SSP2_TXD,  /* SSP2_TXD */
      GPIO40_SSP2_RXD,  /* SSP2_RXD */

      /* LEDs */
      GPIO10_GPIO,            /* WiFi LED */
      GPIO83_GPIO,            /* Charging LED */
      GPIO85_GPIO,            /* Charged LED */

      /* I2S */
      GPIO28_I2S_BITCLK_OUT,
      GPIO29_I2S_SDATA_IN,
      GPIO30_I2S_SDATA_OUT,
      GPIO31_I2S_SYNC,
      GPIO113_I2S_SYSCLK,

      /* MISC */
      GPIO0_GPIO,       /* AC power detect */
      GPIO1_GPIO,       /* Power button */
      GPIO37_GPIO,            /* Headphone detect */
      GPIO98_GPIO,            /* Lid switch */
      GPIO14_GPIO,            /* WiFi Reset */
      GPIO15_GPIO,            /* WiFi Power */
      GPIO24_GPIO,            /* WiFi CS */
      GPIO36_GPIO,            /* WiFi IRQ */
      GPIO88_GPIO,            /* LCD CS */
};

/******************************************************************************
 * NOR Flash
 ******************************************************************************/
#if defined(CONFIG_MTD_PHYSMAP) || defined(CONFIG_MTD_PHYSMAP_MODULE)
static struct resource z2_flash_resource = {
      .start      = PXA_CS0_PHYS,
      .end  = PXA_CS0_PHYS + SZ_8M - 1,
      .flags      = IORESOURCE_MEM,
};

static struct mtd_partition z2_flash_parts[] = {
      {
            .name = "U-Boot Bootloader",
            .offset     = 0x0,
            .size = 0x40000,
      }, {
            .name = "U-Boot Environment",
            .offset     = 0x40000,
            .size = 0x20000,
      }, {
            .name = "Flash",
            .offset     = 0x60000,
            .size = MTDPART_SIZ_FULL,
      },
};

static struct physmap_flash_data z2_flash_data = {
      .width            = 2,
      .parts            = z2_flash_parts,
      .nr_parts   = ARRAY_SIZE(z2_flash_parts),
};

static struct platform_device z2_flash = {
      .name       = "physmap-flash",
      .id         = -1,
      .resource   = &z2_flash_resource,
      .num_resources    = 1,
      .dev = {
            .platform_data    = &z2_flash_data,
      },
};

static void __init z2_nor_init(void)
{
      platform_device_register(&z2_flash);
}
#else
static inline void z2_nor_init(void) {}
#endif

/******************************************************************************
 * Backlight
 ******************************************************************************/
#if defined(CONFIG_BACKLIGHT_PWM) || defined(CONFIG_BACKLIGHT_PWM_MODULE)
static struct platform_pwm_backlight_data z2_backlight_data[] = {
      [0] = {
            /* Keypad Backlight */
            .pwm_id           = 1,
            .max_brightness   = 1023,
            .dft_brightness   = 512,
            .pwm_period_ns    = 1260320,
      },
      [1] = {
            /* LCD Backlight */
            .pwm_id           = 2,
            .max_brightness   = 1023,
            .dft_brightness   = 512,
            .pwm_period_ns    = 1260320,
      },
};

static struct platform_device z2_backlight_devices[2] = {
      {
            .name = "pwm-backlight",
            .id   = 0,
            .dev  = {
                  .platform_data    = &z2_backlight_data[1],
            },
      },
      {
            .name = "pwm-backlight",
            .id   = 1,
            .dev  = {
                  .platform_data    = &z2_backlight_data[0],
            },
      },
};
static void __init z2_pwm_init(void)
{
      platform_device_register(&z2_backlight_devices[0]);
      platform_device_register(&z2_backlight_devices[1]);
}
#else
static inline void z2_pwm_init(void) {}
#endif

/******************************************************************************
 * Framebuffer
 ******************************************************************************/
#if defined(CONFIG_FB_PXA) || defined(CONFIG_FB_PXA_MODULE)
static struct pxafb_mode_info z2_lcd_modes[] = {
{
      .pixclock   = 192000,
      .xres       = 240,
      .yres       = 320,
      .bpp        = 16,

      .left_margin      = 4,
      .right_margin     = 8,
      .upper_margin     = 4,
      .lower_margin     = 8,

      .hsync_len  = 4,
      .vsync_len  = 4,
},
};

static struct pxafb_mach_info z2_lcd_screen = {
      .modes            = z2_lcd_modes,
      .num_modes      = ARRAY_SIZE(z2_lcd_modes),
      .lcd_conn   = LCD_COLOR_TFT_16BPP | LCD_BIAS_ACTIVE_LOW |
                    LCD_ALTERNATE_MAPPING,
};

static void __init z2_lcd_init(void)
{
      set_pxa_fb_info(&z2_lcd_screen);
}
#else
static inline void z2_lcd_init(void) {}
#endif

/******************************************************************************
 * SD/MMC card controller
 ******************************************************************************/
#if defined(CONFIG_MMC_PXA) || defined(CONFIG_MMC_PXA_MODULE)
static struct pxamci_platform_data z2_mci_platform_data = {
      .ocr_mask         = MMC_VDD_32_33 | MMC_VDD_33_34,
      .gpio_card_detect = GPIO96_ZIPITZ2_SD_DETECT,
      .gpio_power       = -1,
      .gpio_card_ro           = -1,
      .detect_delay_ms  = 200,
};

static void __init z2_mmc_init(void)
{
      pxa_set_mci_info(&z2_mci_platform_data);
}
#else
static inline void z2_mmc_init(void) {}
#endif

/******************************************************************************
 * LEDs
 ******************************************************************************/
#if defined(CONFIG_LEDS_GPIO) || defined(CONFIG_LEDS_GPIO_MODULE)
struct gpio_led z2_gpio_leds[] = {
{
      .name             = "z2:green:wifi",
      .default_trigger  = "none",
      .gpio             = GPIO10_ZIPITZ2_LED_WIFI,
      .active_low       = 1,
}, {
      .name             = "z2:green:charged",
      .default_trigger  = "none",
      .gpio             = GPIO85_ZIPITZ2_LED_CHARGED,
      .active_low       = 1,
}, {
      .name             = "z2:amber:charging",
      .default_trigger  = "none",
      .gpio             = GPIO83_ZIPITZ2_LED_CHARGING,
      .active_low       = 1,
},
};

static struct gpio_led_platform_data z2_gpio_led_info = {
      .leds       = z2_gpio_leds,
      .num_leds   = ARRAY_SIZE(z2_gpio_leds),
};

static struct platform_device z2_leds = {
      .name = "leds-gpio",
      .id   = -1,
      .dev  = {
            .platform_data    = &z2_gpio_led_info,
      }
};

static void __init z2_leds_init(void)
{
      platform_device_register(&z2_leds);
}
#else
static inline void z2_leds_init(void) {}
#endif

/******************************************************************************
 * GPIO keyboard
 ******************************************************************************/
#if defined(CONFIG_KEYBOARD_PXA27x) || defined(CONFIG_KEYBOARD_PXA27x_MODULE)
static unsigned int z2_matrix_keys[] = {
      KEY(0, 0, KEY_OPTION),
      KEY(1, 0, KEY_UP),
      KEY(2, 0, KEY_DOWN),
      KEY(3, 0, KEY_LEFT),
      KEY(4, 0, KEY_RIGHT),
      KEY(5, 0, KEY_END),
      KEY(6, 0, KEY_KPPLUS),

      KEY(0, 1, KEY_HOME),
      KEY(1, 1, KEY_Q),
      KEY(2, 1, KEY_I),
      KEY(3, 1, KEY_G),
      KEY(4, 1, KEY_X),
      KEY(5, 1, KEY_ENTER),
      KEY(6, 1, KEY_KPMINUS),

      KEY(0, 2, KEY_PAGEUP),
      KEY(1, 2, KEY_W),
      KEY(2, 2, KEY_O),
      KEY(3, 2, KEY_H),
      KEY(4, 2, KEY_C),
      KEY(5, 2, KEY_LEFTALT),

      KEY(0, 3, KEY_PAGEDOWN),
      KEY(1, 3, KEY_E),
      KEY(2, 3, KEY_P),
      KEY(3, 3, KEY_J),
      KEY(4, 3, KEY_V),
      KEY(5, 3, KEY_LEFTSHIFT),

      KEY(0, 4, KEY_ESC),
      KEY(1, 4, KEY_R),
      KEY(2, 4, KEY_A),
      KEY(3, 4, KEY_K),
      KEY(4, 4, KEY_B),
      KEY(5, 4, KEY_LEFTCTRL),

      KEY(0, 5, KEY_TAB),
      KEY(1, 5, KEY_T),
      KEY(2, 5, KEY_S),
      KEY(3, 5, KEY_L),
      KEY(4, 5, KEY_N),
      KEY(5, 5, KEY_SPACE),

      KEY(0, 6, KEY_STOPCD),
      KEY(1, 6, KEY_Y),
      KEY(2, 6, KEY_D),
      KEY(3, 6, KEY_BACKSPACE),
      KEY(4, 6, KEY_M),
      KEY(5, 6, KEY_COMMA),

      KEY(0, 7, KEY_PLAYCD),
      KEY(1, 7, KEY_U),
      KEY(2, 7, KEY_F),
      KEY(3, 7, KEY_Z),
      KEY(4, 7, KEY_SEMICOLON),
      KEY(5, 7, KEY_DOT),
};

static struct pxa27x_keypad_platform_data z2_keypad_platform_data = {
      .matrix_key_rows  = 7,
      .matrix_key_cols  = 8,
      .matrix_key_map         = z2_matrix_keys,
      .matrix_key_map_size    = ARRAY_SIZE(z2_matrix_keys),

      .debounce_interval      = 30,
};

static void __init z2_mkp_init(void)
{
      pxa_set_keypad_info(&z2_keypad_platform_data);
}
#else
static inline void z2_mkp_init(void) {}
#endif

/******************************************************************************
 * GPIO keys
 ******************************************************************************/
#if defined(CONFIG_KEYBOARD_GPIO) || defined(CONFIG_KEYBOARD_GPIO_MODULE)
static struct gpio_keys_button z2_pxa_buttons[] = {
      {KEY_POWER, GPIO1_ZIPITZ2_POWER_BUTTON, 0, "Power Button" },
      {KEY_CLOSE, GPIO98_ZIPITZ2_LID_BUTTON, 0, "Lid Button" },
};

static struct gpio_keys_platform_data z2_pxa_keys_data = {
      .buttons    = z2_pxa_buttons,
      .nbuttons   = ARRAY_SIZE(z2_pxa_buttons),
};

static struct platform_device z2_pxa_keys = {
      .name = "gpio-keys",
      .id   = -1,
      .dev  = {
            .platform_data = &z2_pxa_keys_data,
      },
};

static void __init z2_keys_init(void)
{
      platform_device_register(&z2_pxa_keys);
}
#else
static inline void z2_keys_init(void) {}
#endif

/******************************************************************************
 * Battery
 ******************************************************************************/
#if defined(CONFIG_I2C_PXA) || defined(CONFIG_I2C_PXA_MODULE)
static struct z2_battery_info batt_chip_info = {
      .batt_I2C_bus     = 0,
      .batt_I2C_addr    = 0x55,
      .batt_I2C_reg     = 2,
      .charge_gpio      = GPIO0_ZIPITZ2_AC_DETECT,
      .min_voltage      = 2400000,
      .max_voltage      = 3700000,
      .batt_div   = 69,
      .batt_mult  = 1000000,
      .batt_tech  = POWER_SUPPLY_TECHNOLOGY_LION,
      .batt_name  = "Z2",
};

static struct i2c_board_info __initdata z2_i2c_board_info[] = {
      {
            I2C_BOARD_INFO("aer915", 0x55),
            .platform_data    = &batt_chip_info,
      }, {
            I2C_BOARD_INFO("wm8750", 0x1b),
      },

};

static void __init z2_i2c_init(void)
{
      pxa_set_i2c_info(NULL);
      i2c_register_board_info(0, ARRAY_AND_SIZE(z2_i2c_board_info));
}
#else
static inline void z2_i2c_init(void) {}
#endif

/******************************************************************************
 * SSP Devices - WiFi and LCD control
 ******************************************************************************/
#if defined(CONFIG_SPI_PXA2XX) || defined(CONFIG_SPI_PXA2XX_MODULE)
/* WiFi */
static int z2_lbs_spi_setup(struct spi_device *spi)
{
      int ret = 0;

      ret = gpio_request(GPIO15_ZIPITZ2_WIFI_POWER, "WiFi Power");
      if (ret)
            goto err;

      ret = gpio_direction_output(GPIO15_ZIPITZ2_WIFI_POWER, 1);
      if (ret)
            goto err2;

      ret = gpio_request(GPIO14_ZIPITZ2_WIFI_RESET, "WiFi Reset");
      if (ret)
            goto err2;

      ret = gpio_direction_output(GPIO14_ZIPITZ2_WIFI_RESET, 0);
      if (ret)
            goto err3;

      /* Reset the card */
      mdelay(180);
      gpio_set_value(GPIO14_ZIPITZ2_WIFI_RESET, 1);
      mdelay(20);

      spi->bits_per_word = 16;
      spi->mode = SPI_MODE_2,

      spi_setup(spi);

      return 0;

err3:
      gpio_free(GPIO14_ZIPITZ2_WIFI_RESET);
err2:
      gpio_free(GPIO15_ZIPITZ2_WIFI_POWER);
err:
      return ret;
};

static int z2_lbs_spi_teardown(struct spi_device *spi)
{
      gpio_set_value(GPIO14_ZIPITZ2_WIFI_RESET, 0);
      gpio_set_value(GPIO15_ZIPITZ2_WIFI_POWER, 0);
      gpio_free(GPIO14_ZIPITZ2_WIFI_RESET);
      gpio_free(GPIO15_ZIPITZ2_WIFI_POWER);
      return 0;

};

static struct pxa2xx_spi_chip z2_lbs_chip_info = {
      .rx_threshold     = 8,
      .tx_threshold     = 8,
      .timeout    = 1000,
      .gpio_cs    = GPIO24_ZIPITZ2_WIFI_CS,
};

static struct libertas_spi_platform_data z2_lbs_pdata = {
      .use_dummy_writes = 1,
      .setup                  = z2_lbs_spi_setup,
      .teardown         = z2_lbs_spi_teardown,
};

/* LCD */
static struct pxa2xx_spi_chip lms283_chip_info = {
      .rx_threshold     = 1,
      .tx_threshold     = 1,
      .timeout    = 64,
      .gpio_cs    = GPIO88_ZIPITZ2_LCD_CS,
};

static const struct lms283gf05_pdata lms283_pdata = {
      .reset_gpio = GPIO19_ZIPITZ2_LCD_RESET,
};

static struct spi_board_info spi_board_info[] __initdata = {
{
      .modalias         = "libertas_spi",
      .platform_data          = &z2_lbs_pdata,
      .controller_data  = &z2_lbs_chip_info,
      .irq              = gpio_to_irq(GPIO36_ZIPITZ2_WIFI_IRQ),
      .max_speed_hz           = 13000000,
      .bus_num          = 1,
      .chip_select            = 0,
},
{
      .modalias         = "lms283gf05",
      .controller_data  = &lms283_chip_info,
      .platform_data          = &lms283_pdata,
      .max_speed_hz           = 400000,
      .bus_num          = 2,
      .chip_select            = 0,
},
};

static struct pxa2xx_spi_master pxa_ssp1_master_info = {
      .clock_enable     = CKEN_SSP,
      .num_chipselect   = 1,
      .enable_dma = 1,
};

static struct pxa2xx_spi_master pxa_ssp2_master_info = {
      .clock_enable     = CKEN_SSP2,
      .num_chipselect   = 1,
};

static void __init z2_spi_init(void)
{
      pxa2xx_set_spi_info(1, &pxa_ssp1_master_info);
      pxa2xx_set_spi_info(2, &pxa_ssp2_master_info);
      spi_register_board_info(spi_board_info, ARRAY_SIZE(spi_board_info));
}
#else
static inline void z2_spi_init(void) {}
#endif

/******************************************************************************
 * Core power regulator
 ******************************************************************************/
#if defined(CONFIG_REGULATOR_TPS65023) || \
      defined(CONFIG_REGULATOR_TPS65023_MODULE)
static struct regulator_consumer_supply z2_tps65021_consumers[] = {
      {
            .supply     = "vcc_core",
      }
};

static struct regulator_init_data z2_tps65021_info[] = {
      {
            .constraints = {
                  .name       = "vcc_core range",
                  .min_uV           = 800000,
                  .max_uV           = 1600000,
                  .always_on  = 1,
                  .valid_ops_mask   = REGULATOR_CHANGE_VOLTAGE,
            },
            .consumer_supplies      = z2_tps65021_consumers,
            .num_consumer_supplies  = ARRAY_SIZE(z2_tps65021_consumers),
      }, {
            .constraints = {
                  .name       = "DCDC2",
                  .min_uV           = 3300000,
                  .max_uV           = 3300000,
                  .always_on  = 1,
            },
      }, {
            .constraints = {
                  .name       = "DCDC3",
                  .min_uV           = 1800000,
                  .max_uV           = 1800000,
                  .always_on  = 1,
            },
      }, {
            .constraints = {
                  .name       = "LDO1",
                  .min_uV           = 1000000,
                  .max_uV           = 3150000,
                  .always_on  = 1,
            },
      }, {
            .constraints = {
                  .name       = "LDO2",
                  .min_uV           = 1050000,
                  .max_uV           = 3300000,
                  .always_on  = 1,
            },
      }
};

static struct i2c_board_info __initdata z2_pi2c_board_info[] = {
      {
            I2C_BOARD_INFO("tps65021", 0x48),
            .platform_data    = &z2_tps65021_info,
      },
};

static void __init z2_pmic_init(void)
{
      pxa27x_set_i2c_power_info(NULL);
      i2c_register_board_info(1, ARRAY_AND_SIZE(z2_pi2c_board_info));
}
#else
static inline void z2_pmic_init(void) {}
#endif

/******************************************************************************
 * Machine init
 ******************************************************************************/
static void __init z2_init(void)
{
      pxa2xx_mfp_config(ARRAY_AND_SIZE(z2_pin_config));

      pxa_set_ffuart_info(NULL);
      pxa_set_btuart_info(NULL);
      pxa_set_stuart_info(NULL);

      z2_lcd_init();
      z2_mmc_init();
      z2_mkp_init();
      z2_i2c_init();
      z2_spi_init();
      z2_nor_init();
      z2_pwm_init();
      z2_leds_init();
      z2_keys_init();
      z2_pmic_init();
}

MACHINE_START(ZIPIT2, "Zipit Z2")
      .boot_params      = 0xa0000100,
      .map_io           = pxa27x_map_io,
      .init_irq   = pxa27x_init_irq,
      .timer            = &pxa_timer,
      .init_machine     = z2_init,
MACHINE_END

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