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mach-smartq.c

/*
 * 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 <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 <plat/iic.h>
#include <plat/gpio-cfg.h>
#include <plat/hwmon.h>
#include <plat/regs-serial.h>
#include <plat/udc-hs.h>
#include <plat/usb-control.h>
#include <plat/sdhci.h>
#include <plat/ts.h>

#include <video/platform_lcd.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 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_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));
}

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