mach-smartq.c

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/*
 * linux/arch/arm/mach-s3c64xx/mach-smartq.c
 *
 * Copyright (C) 2010 Maurus Cuelenaere
 *
 * 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/delay.h>
#include <linux/fb.h>
#include <linux/gpio.h>
#include <linux/init.h>
#include <linux/platform_device.h>
#include <linux/pwm_backlight.h>
#include <linux/serial_core.h>
#include <linux/spi/spi_gpio.h>
#include <linux/usb/gpio_vbus.h>
#include <linux/platform_data/s3c-hsotg.h>

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

#include <mach/map.h>
#include <mach/regs-gpio.h>
#include <mach/regs-modem.h>

#include <plat/clock.h>
#include <plat/cpu.h>
#include <plat/devs.h>
#include <linux/platform_data/i2c-s3c2410.h>
#include <plat/gpio-cfg.h>
#include <linux/platform_data/hwmon-s3c.h>
#include <plat/regs-serial.h>
#include <linux/platform_data/usb-ohci-s3c2410.h>
#include <plat/sdhci.h>
#include <linux/platform_data/touchscreen-s3c2410.h>

#include <video/platform_lcd.h>

#include "common.h"

#define UCON S3C2410_UCON_DEFAULT
#define ULCON (S3C2410_LCON_CS8 | S3C2410_LCON_PNONE)
#define UFCON (S3C2410_UFCON_RXTRIG8 | S3C2410_UFCON_FIFOMODE)

static struct s3c2410_uartcfg smartq_uartcfgs[] __initdata = {
    [0] = {
        .hwport      = 0,
        .flags       = 0,
        .ucon        = UCON,
        .ulcon       = ULCON,
        .ufcon       = UFCON,
    },
    [1] = {
        .hwport      = 1,
        .flags       = 0,
        .ucon        = UCON,
        .ulcon       = ULCON,
        .ufcon       = UFCON,
    },
    [2] = {
        .hwport      = 2,
        .flags       = 0,
        .ucon        = UCON,
        .ulcon       = ULCON,
        .ufcon       = UFCON,
    },
};

static void smartq_usb_host_powercontrol(int port, int to)
{
    pr_debug("%s(%d, %d)\n", __func__, port, to);

    if (port == 0) {
        gpio_set_value(S3C64XX_GPL(0), to);
        gpio_set_value(S3C64XX_GPL(1), to);
    }
}

static irqreturn_t smartq_usb_host_ocirq(int irq, void *pw)
{
    struct s3c2410_hcd_info *info = pw;

    if (gpio_get_value(S3C64XX_GPL(10)) == 0) {
        pr_debug("%s: over-current irq (oc detected)\n", __func__);
        s3c2410_usb_report_oc(info, 3);
    } else {
        pr_debug("%s: over-current irq (oc cleared)\n", __func__);
        s3c2410_usb_report_oc(info, 0);
    }

    return IRQ_HANDLED;
}

static void smartq_usb_host_enableoc(struct s3c2410_hcd_info *info, int on)
{
    int ret;

    /* This isn't present on a SmartQ 5 board */
    if (machine_is_smartq5())
        return;

    if (on) {
        ret = request_irq(gpio_to_irq(S3C64XX_GPL(10)),
                  smartq_usb_host_ocirq, IRQF_DISABLED |
                  IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING,
                  "USB host overcurrent", info);
        if (ret != 0)
            pr_err("failed to request usb oc irq: %d\n", ret);
    } else {
        free_irq(gpio_to_irq(S3C64XX_GPL(10)), info);
    }
}

static struct s3c2410_hcd_info smartq_usb_host_info = {
    .port[0]    = {
        .flags  = S3C_HCDFLG_USED
    },
    .port[1]    = {
        .flags  = 0
    },

    .power_control  = smartq_usb_host_powercontrol,
    .enable_oc  = smartq_usb_host_enableoc,
};

static struct gpio_vbus_mach_info smartq_usb_otg_vbus_pdata = {
    .gpio_vbus      = S3C64XX_GPL(9),
    .gpio_pullup        = -1,
    .gpio_vbus_inverted = true,
};

static struct platform_device smartq_usb_otg_vbus_dev = {
    .name           = "gpio-vbus",
    .dev.platform_data  = &smartq_usb_otg_vbus_pdata,
};

static int smartq_bl_init(struct device *dev)
{
    s3c_gpio_cfgpin(S3C64XX_GPF(15), S3C_GPIO_SFN(2));

    return 0;
}

static struct platform_pwm_backlight_data smartq_backlight_data = {
    .pwm_id     = 1,
    .max_brightness = 1000,
    .dft_brightness = 600,
    .pwm_period_ns  = 1000000000 / (1000 * 20),
    .init       = smartq_bl_init,
};

static struct platform_device smartq_backlight_device = {
    .name       = "pwm-backlight",
    .dev        = {
        .parent = &s3c_device_timer[1].dev,
        .platform_data = &smartq_backlight_data,
    },
};

static struct s3c2410_ts_mach_info smartq_touchscreen_pdata __initdata = {
    .delay          = 65535,
    .presc          = 99,
    .oversampling_shift = 4,
};

static struct s3c_sdhci_platdata smartq_internal_hsmmc_pdata = {
    .max_width      = 4,
    .cd_type        = S3C_SDHCI_CD_PERMANENT,
};

static struct s3c_hwmon_pdata smartq_hwmon_pdata __initdata = {
    /* Battery voltage (?-4.2V) */
    .in[0] = &(struct s3c_hwmon_chcfg) {
        .name       = "smartq:battery-voltage",
        .mult       = 3300,
        .div        = 2048,
    },
    /* Reference voltage (1.2V) */
    .in[1] = &(struct s3c_hwmon_chcfg) {
        .name       = "smartq:reference-voltage",
        .mult       = 3300,
        .div        = 4096,
    },
};

static struct s3c_hsotg_plat smartq_hsotg_pdata;

static int __init smartq_lcd_setup_gpio(void)
{
    int ret;

    ret = gpio_request(S3C64XX_GPM(3), "LCD power");
    if (ret < 0)
        return ret;

    /* turn power off */
    gpio_direction_output(S3C64XX_GPM(3), 0);

    return 0;
}

/* GPM0 -> CS */
static struct spi_gpio_platform_data smartq_lcd_control = {
    .sck            = S3C64XX_GPM(1),
    .mosi           = S3C64XX_GPM(2),
    .miso           = S3C64XX_GPM(2),
};

static struct platform_device smartq_lcd_control_device = {
    .name           = "spi-gpio",
    .id         = 1,
    .dev.platform_data  = &smartq_lcd_control,
};

static void smartq_lcd_power_set(struct plat_lcd_data *pd, unsigned int power)
{
    gpio_direction_output(S3C64XX_GPM(3), power);
}

static struct plat_lcd_data smartq_lcd_power_data = {
    .set_power  = smartq_lcd_power_set,
};

static struct platform_device smartq_lcd_power_device = {
    .name           = "platform-lcd",
    .dev.parent     = &s3c_device_fb.dev,
    .dev.platform_data  = &smartq_lcd_power_data,
};

static struct i2c_board_info smartq_i2c_devs[] __initdata = {
    { I2C_BOARD_INFO("wm8987", 0x1a), },
};

static struct platform_device *smartq_devices[] __initdata = {
    &s3c_device_hsmmc1, /* Init iNAND first, ... */
    &s3c_device_hsmmc0, /* ... then the external SD card */
    &s3c_device_hsmmc2,
    &s3c_device_adc,
    &s3c_device_fb,
    &s3c_device_hwmon,
    &s3c_device_i2c0,
    &s3c_device_ohci,
    &s3c_device_rtc,
    &s3c_device_timer[1],
    &s3c_device_ts,
    &s3c_device_usb_hsotg,
    &s3c64xx_device_iis0,
    &smartq_backlight_device,
    &smartq_lcd_control_device,
    &smartq_lcd_power_device,
    &smartq_usb_otg_vbus_dev,
};

static void __init smartq_lcd_mode_set(void)
{
    u32 tmp;

    /* set the LCD type */
    tmp = __raw_readl(S3C64XX_SPCON);
    tmp &= ~S3C64XX_SPCON_LCD_SEL_MASK;
    tmp |= S3C64XX_SPCON_LCD_SEL_RGB;
    __raw_writel(tmp, S3C64XX_SPCON);

    /* remove the LCD bypass */
    tmp = __raw_readl(S3C64XX_MODEM_MIFPCON);
    tmp &= ~MIFPCON_LCD_BYPASS;
    __raw_writel(tmp, S3C64XX_MODEM_MIFPCON);
}

static void smartq_power_off(void)
{
    gpio_direction_output(S3C64XX_GPK(15), 1);
}

static int __init smartq_power_off_init(void)
{
    int ret;

    ret = gpio_request(S3C64XX_GPK(15), "Power control");
    if (ret < 0) {
        pr_err("%s: failed to get GPK15\n", __func__);
        return ret;
    }

    /* leave power on */
    gpio_direction_output(S3C64XX_GPK(15), 0);

    pm_power_off = smartq_power_off;

    return ret;
}

static int __init smartq_usb_host_init(void)
{
    int ret;

    ret = gpio_request(S3C64XX_GPL(0), "USB power control");
    if (ret < 0) {
        pr_err("%s: failed to get GPL0\n", __func__);
        return ret;
    }

    ret = gpio_request(S3C64XX_GPL(1), "USB host power control");
    if (ret < 0) {
        pr_err("%s: failed to get GPL1\n", __func__);
        goto err;
    }

    if (!machine_is_smartq5()) {
        /* This isn't present on a SmartQ 5 board */
        ret = gpio_request(S3C64XX_GPL(10), "USB host overcurrent");
        if (ret < 0) {
            pr_err("%s: failed to get GPL10\n", __func__);
            goto err2;
        }
    }

    /* turn power off */
    gpio_direction_output(S3C64XX_GPL(0), 0);
    gpio_direction_output(S3C64XX_GPL(1), 0);
    if (!machine_is_smartq5())
        gpio_direction_input(S3C64XX_GPL(10));

    s3c_device_ohci.dev.platform_data = &smartq_usb_host_info;

    return 0;

err2:
    gpio_free(S3C64XX_GPL(1));
err:
    gpio_free(S3C64XX_GPL(0));
    return ret;
}

static int __init smartq_usb_otg_init(void)
{
    clk_xusbxti.rate = 12000000;

    return 0;
}

static int __init smartq_wifi_init(void)
{
    int ret;

    ret = gpio_request(S3C64XX_GPK(1), "wifi control");
    if (ret < 0) {
        pr_err("%s: failed to get GPK1\n", __func__);
        return ret;
    }

    ret = gpio_request(S3C64XX_GPK(2), "wifi reset");
    if (ret < 0) {
        pr_err("%s: failed to get GPK2\n", __func__);
        gpio_free(S3C64XX_GPK(1));
        return ret;
    }

    /* turn power on */
    gpio_direction_output(S3C64XX_GPK(1), 1);

    /* reset device */
    gpio_direction_output(S3C64XX_GPK(2), 0);
    mdelay(100);
    gpio_set_value(S3C64XX_GPK(2), 1);
    gpio_direction_input(S3C64XX_GPK(2));

    return 0;
}

static struct map_desc smartq_iodesc[] __initdata = {};
void __init smartq_map_io(void)
{
    s3c64xx_init_io(smartq_iodesc, ARRAY_SIZE(smartq_iodesc));
    s3c24xx_init_clocks(12000000);
    s3c24xx_init_uarts(smartq_uartcfgs, ARRAY_SIZE(smartq_uartcfgs));

    smartq_lcd_mode_set();
}

void __init smartq_machine_init(void)
{
    s3c_i2c0_set_platdata(NULL);
    s3c_hsotg_set_platdata(&smartq_hsotg_pdata);
    s3c_hwmon_set_platdata(&smartq_hwmon_pdata);
    s3c_sdhci1_set_platdata(&smartq_internal_hsmmc_pdata);
    s3c_sdhci2_set_platdata(&smartq_internal_hsmmc_pdata);
    s3c24xx_ts_set_platdata(&smartq_touchscreen_pdata);

    i2c_register_board_info(0, smartq_i2c_devs,
                ARRAY_SIZE(smartq_i2c_devs));

    WARN_ON(smartq_lcd_setup_gpio());
    WARN_ON(smartq_power_off_init());
    WARN_ON(smartq_usb_host_init());
    WARN_ON(smartq_usb_otg_init());
    WARN_ON(smartq_wifi_init());

    platform_add_devices(smartq_devices, ARRAY_SIZE(smartq_devices));
}