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mach-hmt.c

/* mach-hmt.c - Platform code for Airgoo HMT
 *
 * Copyright 2009 Peter Korsgaard <jacmet@sunsite.dk>
 *
 * 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/serial_core.h>
#include <linux/platform_device.h>
#include <linux/io.h>
#include <linux/i2c.h>
#include <linux/fb.h>
#include <linux/gpio.h>
#include <linux/delay.h>
#include <linux/leds.h>
#include <linux/pwm_backlight.h>
#include <linux/mtd/mtd.h>
#include <linux/mtd/partitions.h>

#include <asm/mach/arch.h>
#include <asm/mach/map.h>
#include <asm/mach/irq.h>

#include <mach/hardware.h>
#include <mach/regs-fb.h>
#include <mach/map.h>

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

#include <plat/regs-serial.h>
#include <plat/iic.h>
#include <plat/fb.h>
#include <plat/nand.h>

#include <plat/s3c6410.h>
#include <plat/clock.h>
#include <plat/devs.h>
#include <plat/cpu.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 hmt_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 int hmt_bl_init(struct device *dev)
{
      int ret;

      ret = gpio_request(S3C64XX_GPB(4), "lcd backlight enable");
      if (!ret)
            ret = gpio_direction_output(S3C64XX_GPB(4), 0);

      return ret;
}

static int hmt_bl_notify(int brightness)
{
      /*
       * translate from CIELUV/CIELAB L*->brightness, E.G. from
       * perceived luminance to light output. Assumes range 0..25600
       */
      if (brightness < 0x800) {
            /* Y = Yn * L / 903.3 */
            brightness = (100*256 * brightness + 231245/2) / 231245;
      } else {
            /* Y = Yn * ((L + 16) / 116 )^3 */
            int t = (brightness*4 + 16*1024 + 58)/116;
            brightness = 25 * ((t * t * t + 0x100000/2) / 0x100000);
      }

      gpio_set_value(S3C64XX_GPB(4), brightness);

      return brightness;
}

static void hmt_bl_exit(struct device *dev)
{
      gpio_free(S3C64XX_GPB(4));
}

static struct platform_pwm_backlight_data hmt_backlight_data = {
      .pwm_id           = 1,
      .max_brightness   = 100 * 256,
      .dft_brightness   = 40 * 256,
      .pwm_period_ns    = 1000000000 / (100 * 256 * 20),
      .init       = hmt_bl_init,
      .notify           = hmt_bl_notify,
      .exit       = hmt_bl_exit,

};

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

static struct s3c_fb_pd_win hmt_fb_win0 = {
      .win_mode   = {
            .pixclock   = 41094,
            .left_margin      = 8,
            .right_margin     = 13,
            .upper_margin     = 7,
            .lower_margin     = 5,
            .hsync_len  = 3,
            .vsync_len  = 1,
            .xres       = 800,
            .yres       = 480,
      },
      .max_bpp    = 32,
      .default_bpp      = 16,
};

/* 405566 clocks per frame => 60Hz refresh requires 24333960Hz clock */
static struct s3c_fb_platdata hmt_lcd_pdata __initdata = {
      .setup_gpio = s3c64xx_fb_gpio_setup_24bpp,
      .win[0]           = &hmt_fb_win0,
      .vidcon0    = VIDCON0_VIDOUT_RGB | VIDCON0_PNRMODE_RGB,
      .vidcon1    = VIDCON1_INV_HSYNC | VIDCON1_INV_VSYNC,
};

static struct mtd_partition hmt_nand_part[] = {
      [0] = {
            .name = "uboot",
            .size = SZ_512K,
            .offset     = 0,
      },
      [1] = {
            .name = "uboot-env1",
            .size = SZ_256K,
            .offset     = SZ_512K,
      },
      [2] = {
            .name = "uboot-env2",
            .size = SZ_256K,
            .offset     = SZ_512K + SZ_256K,
      },
      [3] = {
            .name = "kernel",
            .size = SZ_2M,
            .offset     = SZ_1M,
      },
      [4] = {
            .name = "rootfs",
            .size = MTDPART_SIZ_FULL,
            .offset     = SZ_1M + SZ_2M,
      },
};

static struct s3c2410_nand_set hmt_nand_sets[] = {
      [0] = {
            .name       = "nand",
            .nr_chips   = 1,
            .nr_partitions    = ARRAY_SIZE(hmt_nand_part),
            .partitions = hmt_nand_part,
      },
};

static struct s3c2410_platform_nand hmt_nand_info = {
      .tacls            = 25,
      .twrph0           = 55,
      .twrph1           = 40,
      .nr_sets    = ARRAY_SIZE(hmt_nand_sets),
      .sets       = hmt_nand_sets,
};

static struct gpio_led hmt_leds[] = {
      { /* left function keys */
            .name             = "left:blue",
            .gpio             = S3C64XX_GPO(12),
            .default_trigger  = "default-on",
      },
      { /* right function keys - red */
            .name             = "right:red",
            .gpio             = S3C64XX_GPO(13),
      },
      { /* right function keys - green */
            .name             = "right:green",
            .gpio             = S3C64XX_GPO(14),
      },
      { /* right function keys - blue */
            .name             = "right:blue",
            .gpio             = S3C64XX_GPO(15),
            .default_trigger  = "default-on",
      },
};

static struct gpio_led_platform_data hmt_led_data = {
      .num_leds = ARRAY_SIZE(hmt_leds),
      .leds = hmt_leds,
};

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

static struct map_desc hmt_iodesc[] = {};

static struct platform_device *hmt_devices[] __initdata = {
      &s3c_device_i2c0,
      &s3c_device_nand,
      &s3c_device_fb,
      &s3c_device_usb,
      &s3c_device_timer[1],
      &hmt_backlight_device,
      &hmt_leds_device,
};

static void __init hmt_map_io(void)
{
      s3c64xx_init_io(hmt_iodesc, ARRAY_SIZE(hmt_iodesc));
      s3c24xx_init_clocks(12000000);
      s3c24xx_init_uarts(hmt_uartcfgs, ARRAY_SIZE(hmt_uartcfgs));
}

static void __init hmt_machine_init(void)
{
      s3c_i2c0_set_platdata(NULL);
      s3c_fb_set_platdata(&hmt_lcd_pdata);
      s3c_device_nand.dev.platform_data = &hmt_nand_info;

      gpio_request(S3C64XX_GPC(7), "usb power");
      gpio_direction_output(S3C64XX_GPC(7), 0);
      gpio_request(S3C64XX_GPM(0), "usb power");
      gpio_direction_output(S3C64XX_GPM(0), 1);
      gpio_request(S3C64XX_GPK(7), "usb power");
      gpio_direction_output(S3C64XX_GPK(7), 1);
      gpio_request(S3C64XX_GPF(13), "usb power");
      gpio_direction_output(S3C64XX_GPF(13), 1);

      platform_add_devices(hmt_devices, ARRAY_SIZE(hmt_devices));
}

MACHINE_START(HMT, "Airgoo-HMT")
      /* Maintainer: Peter Korsgaard <jacmet@sunsite.dk> */
      .phys_io    = S3C_PA_UART & 0xfff00000,
      .io_pg_offst      = (((u32)S3C_VA_UART) >> 18) & 0xfffc,
      .boot_params      = S3C64XX_PA_SDRAM + 0x100,
      .init_irq   = s3c6410_init_irq,
      .map_io           = hmt_map_io,
      .init_machine     = hmt_machine_init,
      .timer            = &s3c24xx_timer,
MACHINE_END

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