z2.c

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/*
 *  linux/arch/arm/mach-pxa/z2.c
 *
 *  Support for the Zipit Z2 Handheld device.
 *
 *  Copyright (C) 2009-2010 Marek Vasut <[email protected]>
 *
 *  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 <linux/i2c/pxa-i2c.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 <linux/platform_data/video-pxafb.h>
#include <linux/platform_data/mmc-pxamci.h>
#include <linux/platform_data/keypad-pxa27x.h>
#include <mach/pm.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,
    GPIO101_KP_MKIN_1,
    GPIO102_KP_MKIN_2,
    GPIO34_KP_MKIN_3,
    GPIO38_KP_MKIN_4,
    GPIO16_KP_MKIN_5,
    GPIO17_KP_MKIN_6,
    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 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 = 0,
        .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)
{
    pxa_set_fb_info(NULL, &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    = "mmc0",
    .gpio           = GPIO85_ZIPITZ2_LED_CHARGED,
    .active_low     = 1,
}, {
    .name           = "z2:amber:charging",
    .default_trigger    = "Z2-charging-or-full",
    .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[] = {
    {
        .code       = KEY_POWER,
        .gpio       = GPIO1_ZIPITZ2_POWER_BUTTON,
        .active_low = 0,
        .desc       = "Power Button",
        .wakeup     = 1,
        .type       = EV_KEY,
    },
    {
        .code       = SW_LID,
        .gpio       = GPIO98_ZIPITZ2_LID_BUTTON,
        .active_low = 1,
        .desc       = "Lid Switch",
        .wakeup     = 0,
        .type       = EV_SW,
    },
};

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    = 3475000,
    .max_voltage    = 4190000,
    .batt_div   = 59,
    .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(GPIO14_ZIPITZ2_WIFI_POWER, "WiFi Power");
    if (ret)
        goto err;

    ret = gpio_direction_output(GPIO14_ZIPITZ2_WIFI_POWER, 1);
    if (ret)
        goto err2;

    /* Wait until card is powered on */
    mdelay(180);

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

    spi_setup(spi);

    return 0;

err2:
    gpio_free(GPIO14_ZIPITZ2_WIFI_POWER);
err:
    return ret;
};

static int z2_lbs_spi_teardown(struct spi_device *spi)
{
    gpio_set_value(GPIO14_ZIPITZ2_WIFI_POWER, 0);
    gpio_free(GPIO14_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            = PXA_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[] = {
    REGULATOR_SUPPLY("vcc_core", NULL),
};

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

#ifdef CONFIG_PM
static void z2_power_off(void)
{
    /* We're using deep sleep as poweroff, so clear PSPR to ensure that
     * bootloader will jump to its entry point in resume handler
     */
    PSPR = 0x0;
    local_irq_disable();
    pxa27x_set_pwrmode(PWRMODE_DEEPSLEEP);
    pxa27x_cpu_pm_enter(PM_SUSPEND_MEM);
}
#else
#define z2_power_off   NULL
#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();

    pm_power_off = z2_power_off;
}

MACHINE_START(ZIPIT2, "Zipit Z2")
    .atag_offset    = 0x100,
    .map_io     = pxa27x_map_io,
    .nr_irqs    = PXA_NR_IRQS,
    .init_irq   = pxa27x_init_irq,
    .handle_irq = pxa27x_handle_irq,
    .timer      = &pxa_timer,
    .init_machine   = z2_init,
    .restart    = pxa_restart,
MACHINE_END