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mach-mini2440.c

/* linux/arch/arm/mach-s3c2440/mach-mini2440.c
 *
 * Copyright (c) 2008 Ramax Lo <ramaxlo@gmail.com>
 *      Based on mach-anubis.c by Ben Dooks <ben@simtec.co.uk>
 *      and modifications by SBZ <sbz@spgui.org> and
 *      Weibing <http://weibing.blogbus.com> and
 *      Michel Pollet <buserror@gmail.com>
 *
 * For product information, visit http://code.google.com/p/mini2440/
 *
 * 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/types.h>
#include <linux/interrupt.h>
#include <linux/list.h>
#include <linux/timer.h>
#include <linux/init.h>
#include <linux/gpio.h>
#include <linux/input.h>
#include <linux/io.h>
#include <linux/serial_core.h>
#include <linux/dm9000.h>
#include <linux/i2c/at24.h>
#include <linux/platform_device.h>
#include <linux/gpio_keys.h>
#include <linux/i2c.h>
#include <linux/mmc/host.h>

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

#include <mach/hardware.h>
#include <mach/fb.h>
#include <asm/mach-types.h>

#include <plat/regs-serial.h>
#include <mach/regs-gpio.h>
#include <mach/leds-gpio.h>
#include <mach/regs-mem.h>
#include <mach/regs-lcd.h>
#include <mach/irqs.h>
#include <plat/nand.h>
#include <plat/iic.h>
#include <plat/mci.h>
#include <plat/udc.h>

#include <linux/mtd/mtd.h>
#include <linux/mtd/nand.h>
#include <linux/mtd/nand_ecc.h>
#include <linux/mtd/partitions.h>

#include <plat/clock.h>
#include <plat/devs.h>
#include <plat/cpu.h>

#include <sound/s3c24xx_uda134x.h>

#define MACH_MINI2440_DM9K_BASE (S3C2410_CS4 + 0x300)

static struct map_desc mini2440_iodesc[] __initdata = {
      /* nothing to declare, move along */
};

#define UCON S3C2410_UCON_DEFAULT
#define ULCON S3C2410_LCON_CS8 | S3C2410_LCON_PNONE | S3C2410_LCON_STOPB
#define UFCON S3C2410_UFCON_RXTRIG8 | S3C2410_UFCON_FIFOMODE


static struct s3c2410_uartcfg mini2440_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,
      },
};

/* USB device UDC support */

static void mini2440_udc_pullup(enum s3c2410_udc_cmd_e cmd)
{
      pr_debug("udc: pullup(%d)\n", cmd);

      switch (cmd) {
            case S3C2410_UDC_P_ENABLE :
                  s3c2410_gpio_setpin(S3C2410_GPC(5), 1);
                  break;
            case S3C2410_UDC_P_DISABLE :
                  s3c2410_gpio_setpin(S3C2410_GPC(5), 0);
                  break;
            case S3C2410_UDC_P_RESET :
                  break;
            default:
                  break;
      }
}

static struct s3c2410_udc_mach_info mini2440_udc_cfg __initdata = {
      .udc_command            = mini2440_udc_pullup,
};


/* LCD timing and setup */

/*
 * This macro simplifies the table bellow
 */
#define _LCD_DECLARE(_clock,_xres,margin_left,margin_right,hsync, \
                  _yres,margin_top,margin_bottom,vsync, refresh) \
      .width = _xres, \
      .xres = _xres, \
      .height = _yres, \
      .yres = _yres, \
      .left_margin      = margin_left,    \
      .right_margin     = margin_right,   \
      .upper_margin     = margin_top,     \
      .lower_margin     = margin_bottom,  \
      .hsync_len  = hsync,    \
      .vsync_len  = vsync,    \
      .pixclock   = ((_clock*100000000000LL) /  \
                     ((refresh) * \
                     (hsync + margin_left + _xres + margin_right) * \
                     (vsync + margin_top + _yres + margin_bottom))), \
      .bpp        = 16,\
      .type       = (S3C2410_LCDCON1_TFT16BPP |\
                     S3C2410_LCDCON1_TFT)

static struct s3c2410fb_display mini2440_lcd_cfg[] __initdata = {
      [0] = {     /* mini2440 + 3.5" TFT + touchscreen */
            _LCD_DECLARE(
                  7,                /* The 3.5 is quite fast */
                  240, 21, 38, 6,   /* x timing */
                  320, 4, 4, 2,           /* y timing */
                  60),              /* refresh rate */
            .lcdcon5    = (S3C2410_LCDCON5_FRM565 |
                           S3C2410_LCDCON5_INVVLINE |
                           S3C2410_LCDCON5_INVVFRAME |
                           S3C2410_LCDCON5_INVVDEN |
                           S3C2410_LCDCON5_PWREN),
      },
      [1] = { /* mini2440 + 7" TFT + touchscreen */
            _LCD_DECLARE(
                  10,               /* the 7" runs slower */
                  800, 40, 40, 48,  /* x timing */
                  480, 29, 3, 3,          /* y timing */
                  50),              /* refresh rate */
            .lcdcon5    = (S3C2410_LCDCON5_FRM565 |
                           S3C2410_LCDCON5_INVVLINE |
                           S3C2410_LCDCON5_INVVFRAME |
                           S3C2410_LCDCON5_PWREN),
      },
      /* The VGA shield can outout at several resolutions. All share 
       * the same timings, however, anything smaller than 1024x768
       * will only be displayed in the top left corner of a 1024x768
       * XGA output unless you add optional dip switches to the shield.
       * Therefore timings for other resolutions have been ommited here.
       */
      [2] = {
            _LCD_DECLARE(
                  10,
                  1024, 1, 2, 2,          /* y timing */
                  768, 200, 16, 16,       /* x timing */
                  24),  /* refresh rate, maximum stable,
                         tested with the FPGA shield */
            .lcdcon5    = (S3C2410_LCDCON5_FRM565 |
                           S3C2410_LCDCON5_HWSWP),
      },
};

/* todo - put into gpio header */

#define S3C2410_GPCCON_MASK(x)      (3 << ((x) * 2))
#define S3C2410_GPDCON_MASK(x)      (3 << ((x) * 2))

static struct s3c2410fb_mach_info mini2440_fb_info __initdata = {
      .displays    = &mini2440_lcd_cfg[0], /* not constant! see init */
      .num_displays      = 1,
      .default_display = 0,

      /* Enable VD[2..7], VD[10..15], VD[18..23] and VCLK, syncs, VDEN
       * and disable the pull down resistors on pins we are using for LCD
       * data. */

      .gpcup            = (0xf << 1) | (0x3f << 10),

      .gpccon           = (S3C2410_GPC1_VCLK   | S3C2410_GPC2_VLINE |
                     S3C2410_GPC3_VFRAME | S3C2410_GPC4_VM |
                     S3C2410_GPC10_VD2   | S3C2410_GPC11_VD3 |
                     S3C2410_GPC12_VD4   | S3C2410_GPC13_VD5 |
                     S3C2410_GPC14_VD6   | S3C2410_GPC15_VD7),

      .gpccon_mask      = (S3C2410_GPCCON_MASK(1)  | S3C2410_GPCCON_MASK(2)  |
                     S3C2410_GPCCON_MASK(3)  | S3C2410_GPCCON_MASK(4)  |
                     S3C2410_GPCCON_MASK(10) | S3C2410_GPCCON_MASK(11) |
                     S3C2410_GPCCON_MASK(12) | S3C2410_GPCCON_MASK(13) |
                     S3C2410_GPCCON_MASK(14) | S3C2410_GPCCON_MASK(15)),

      .gpdup            = (0x3f << 2) | (0x3f << 10),

      .gpdcon           = (S3C2410_GPD2_VD10  | S3C2410_GPD3_VD11 |
                     S3C2410_GPD4_VD12  | S3C2410_GPD5_VD13 |
                     S3C2410_GPD6_VD14  | S3C2410_GPD7_VD15 |
                     S3C2410_GPD10_VD18 | S3C2410_GPD11_VD19 |
                     S3C2410_GPD12_VD20 | S3C2410_GPD13_VD21 |
                     S3C2410_GPD14_VD22 | S3C2410_GPD15_VD23),

      .gpdcon_mask      = (S3C2410_GPDCON_MASK(2)  | S3C2410_GPDCON_MASK(3) |
                     S3C2410_GPDCON_MASK(4)  | S3C2410_GPDCON_MASK(5) |
                     S3C2410_GPDCON_MASK(6)  | S3C2410_GPDCON_MASK(7) |
                     S3C2410_GPDCON_MASK(10) | S3C2410_GPDCON_MASK(11)|
                     S3C2410_GPDCON_MASK(12) | S3C2410_GPDCON_MASK(13)|
                     S3C2410_GPDCON_MASK(14) | S3C2410_GPDCON_MASK(15)),
};

/* MMC/SD  */

static struct s3c24xx_mci_pdata mini2440_mmc_cfg __initdata = {
   .gpio_detect   = S3C2410_GPG(8),
   .gpio_wprotect = S3C2410_GPH(8),
   .set_power     = NULL,
   .ocr_avail     = MMC_VDD_32_33|MMC_VDD_33_34,
};

/* NAND Flash on MINI2440 board */

static struct mtd_partition mini2440_default_nand_part[] __initdata = {
      [0] = {
            .name = "u-boot",
            .size = SZ_256K,
            .offset     = 0,
      },
      [1] = {
            .name = "u-boot-env",
            .size = SZ_128K,
            .offset     = SZ_256K,
      },
      [2] = {
            .name = "kernel",
            /* 5 megabytes, for a kernel with no modules
             * or a uImage with a ramdisk attached */
            .size = 0x00500000,
            .offset     = SZ_256K + SZ_128K,
      },
      [3] = {
            .name = "root",
            .offset     = SZ_256K + SZ_128K + 0x00500000,
            .size = MTDPART_SIZ_FULL,
      },
};

static struct s3c2410_nand_set mini2440_nand_sets[] __initdata = {
      [0] = {
            .name       = "nand",
            .nr_chips   = 1,
            .nr_partitions    = ARRAY_SIZE(mini2440_default_nand_part),
            .partitions = mini2440_default_nand_part,
            .flash_bbt  = 1, /* we use u-boot to create a BBT */
      },
};

static struct s3c2410_platform_nand mini2440_nand_info __initdata = {
      .tacls            = 0,
      .twrph0           = 25,
      .twrph1           = 15,
      .nr_sets    = ARRAY_SIZE(mini2440_nand_sets),
      .sets       = mini2440_nand_sets,
      .ignore_unset_ecc = 1,
};

/* DM9000AEP 10/100 ethernet controller */

static struct resource mini2440_dm9k_resource[] __initdata = {
      [0] = {
            .start = MACH_MINI2440_DM9K_BASE,
            .end   = MACH_MINI2440_DM9K_BASE + 3,
            .flags = IORESOURCE_MEM
      },
      [1] = {
            .start = MACH_MINI2440_DM9K_BASE + 4,
            .end   = MACH_MINI2440_DM9K_BASE + 7,
            .flags = IORESOURCE_MEM
      },
      [2] = {
            .start = IRQ_EINT7,
            .end   = IRQ_EINT7,
            .flags = IORESOURCE_IRQ | IORESOURCE_IRQ_HIGHEDGE,
      }
};

/*
 * The DM9000 has no eeprom, and it's MAC address is set by
 * the bootloader before starting the kernel.
 */
static struct dm9000_plat_data mini2440_dm9k_pdata __initdata = {
      .flags            = (DM9000_PLATF_16BITONLY | DM9000_PLATF_NO_EEPROM),
};

static struct platform_device mini2440_device_eth __initdata = {
      .name       = "dm9000",
      .id         = -1,
      .num_resources    = ARRAY_SIZE(mini2440_dm9k_resource),
      .resource   = mini2440_dm9k_resource,
      .dev        = {
            .platform_data    = &mini2440_dm9k_pdata,
      },
};

/*  CON5
 *    +--+   /-----\
 *    |  |    |   |
 *    |  |  |  BAT      |
 *    |  |   \_____/
 *    |  |
 *    |  |  +----+  +----+
 *    |  |  | K5 |  | K1 |
 *    |  |  +----+  +----+
 *    |  |  +----+  +----+
 *    |  |  | K4 |  | K2 |
 *    |  |  +----+  +----+
 *    |  |  +----+  +----+
 *    |  |  | K6 |  | K3 |
 *    |  |  +----+  +----+
 *      .....
 */
static struct gpio_keys_button mini2440_buttons[] __initdata = {
      {
            .gpio       = S3C2410_GPG(0),       /* K1 */
            .code       = KEY_F1,
            .desc       = "Button 1",
            .active_low = 1,
      },
      {
            .gpio       = S3C2410_GPG(3),       /* K2 */
            .code       = KEY_F2,
            .desc       = "Button 2",
            .active_low = 1,
      },
      {
            .gpio       = S3C2410_GPG(5),       /* K3 */
            .code       = KEY_F3,
            .desc       = "Button 3",
            .active_low = 1,
      },
      {
            .gpio       = S3C2410_GPG(6),       /* K4 */
            .code       = KEY_POWER,
            .desc       = "Power",
            .active_low = 1,
      },
      {
            .gpio       = S3C2410_GPG(7),       /* K5 */
            .code       = KEY_F5,
            .desc       = "Button 5",
            .active_low = 1,
      },
#if 0
      /* this pin is also known as TCLK1 and seems to already
       * marked as "in use" somehow in the kernel -- possibly wrongly */
      {
            .gpio       = S3C2410_GPG(11),      /* K6 */
            .code       = KEY_F6,
            .desc       = "Button 6",
            .active_low = 1,
      },
#endif
};

static struct gpio_keys_platform_data mini2440_button_data __initdata = {
      .buttons    = mini2440_buttons,
      .nbuttons   = ARRAY_SIZE(mini2440_buttons),
};

static struct platform_device mini2440_button_device __initdata = {
      .name       = "gpio-keys",
      .id         = -1,
      .dev        = {
            .platform_data    = &mini2440_button_data,
      }
};

/* LEDS */

static struct s3c24xx_led_platdata mini2440_led1_pdata __initdata = {
      .name       = "led1",
      .gpio       = S3C2410_GPB(5),
      .flags            = S3C24XX_LEDF_ACTLOW | S3C24XX_LEDF_TRISTATE,
      .def_trigger      = "heartbeat",
};

static struct s3c24xx_led_platdata mini2440_led2_pdata __initdata = {
      .name       = "led2",
      .gpio       = S3C2410_GPB(6),
      .flags            = S3C24XX_LEDF_ACTLOW | S3C24XX_LEDF_TRISTATE,
      .def_trigger      = "nand-disk",
};

static struct s3c24xx_led_platdata mini2440_led3_pdata __initdata = {
      .name       = "led3",
      .gpio       = S3C2410_GPB(7),
      .flags            = S3C24XX_LEDF_ACTLOW | S3C24XX_LEDF_TRISTATE,
      .def_trigger      = "mmc0",
};

static struct s3c24xx_led_platdata mini2440_led4_pdata __initdata = {
      .name       = "led4",
      .gpio       = S3C2410_GPB(8),
      .flags            = S3C24XX_LEDF_ACTLOW | S3C24XX_LEDF_TRISTATE,
      .def_trigger      = "",
};

static struct s3c24xx_led_platdata mini2440_led_backlight_pdata __initdata = {
      .name       = "backlight",
      .gpio       = S3C2410_GPG(4),
      .def_trigger      = "backlight",
};

static struct platform_device mini2440_led1 __initdata = {
      .name       = "s3c24xx_led",
      .id         = 1,
      .dev        = {
            .platform_data    = &mini2440_led1_pdata,
      },
};

static struct platform_device mini2440_led2 __initdata = {
      .name       = "s3c24xx_led",
      .id         = 2,
      .dev        = {
            .platform_data    = &mini2440_led2_pdata,
      },
};

static struct platform_device mini2440_led3 __initdata = {
      .name       = "s3c24xx_led",
      .id         = 3,
      .dev        = {
            .platform_data    = &mini2440_led3_pdata,
      },
};

static struct platform_device mini2440_led4 __initdata = {
      .name       = "s3c24xx_led",
      .id         = 4,
      .dev        = {
            .platform_data    = &mini2440_led4_pdata,
      },
};

static struct platform_device mini2440_led_backlight __initdata = {
      .name       = "s3c24xx_led",
      .id         = 5,
      .dev        = {
            .platform_data    = &mini2440_led_backlight_pdata,
      },
};

/* AUDIO */

static struct s3c24xx_uda134x_platform_data mini2440_audio_pins __initdata = {
      .l3_clk = S3C2410_GPB(4),
      .l3_mode = S3C2410_GPB(2),
      .l3_data = S3C2410_GPB(3),
      .model = UDA134X_UDA1341
};

static struct platform_device mini2440_audio __initdata = {
      .name       = "s3c24xx_uda134x",
      .id         = 0,
      .dev        = {
            .platform_data    = &mini2440_audio_pins,
      },
};

/*
 * I2C devices
 */
static struct at24_platform_data at24c08 = {
      .byte_len   = SZ_8K / 8,
      .page_size  = 16,
};

static struct i2c_board_info mini2440_i2c_devs[] __initdata = {
      {
            I2C_BOARD_INFO("24c08", 0x50),
            .platform_data = &at24c08,
      },
};

static struct platform_device *mini2440_devices[] __initdata = {
      &s3c_device_usb,
      &s3c_device_wdt,
/*    &s3c_device_adc,*/ /* ADC doesn't like living with touchscreen ! */
      &s3c_device_i2c0,
      &s3c_device_rtc,
      &s3c_device_usbgadget,
      &mini2440_device_eth,
      &mini2440_led1,
      &mini2440_led2,
      &mini2440_led3,
      &mini2440_led4,
      &mini2440_button_device,
      &s3c_device_nand,
      &s3c_device_sdi,
      &s3c_device_iis,
      &mini2440_audio,
/*    &s3c_device_timer[0],*/ /* buzzer pwm, no API for it */
      /* remaining devices are optional */
};

static void __init mini2440_map_io(void)
{
      s3c24xx_init_io(mini2440_iodesc, ARRAY_SIZE(mini2440_iodesc));
      s3c24xx_init_clocks(12000000);
      s3c24xx_init_uarts(mini2440_uartcfgs, ARRAY_SIZE(mini2440_uartcfgs));

      s3c_device_nand.dev.platform_data = &mini2440_nand_info;
      s3c_device_sdi.dev.platform_data = &mini2440_mmc_cfg;
}

/*
 * mini2440_features string
 *
 * t = Touchscreen present
 * b = backlight control
 * c = camera [TODO]
 * 0-9 LCD configuration
 *
 */
static char mini2440_features_str[12] __initdata = "0tb";

static int __init mini2440_features_setup(char *str)
{
      if (str)
            strlcpy(mini2440_features_str, str, sizeof(mini2440_features_str));
      return 1;
}

__setup("mini2440=", mini2440_features_setup);

#define FEATURE_SCREEN (1 << 0)
#define FEATURE_BACKLIGHT (1 << 1)
#define FEATURE_TOUCH (1 << 2)
#define FEATURE_CAMERA (1 << 3)

00564 struct mini2440_features_t {
      int count;
      int done;
      int lcd_index;
      struct platform_device *optional[8];
};

static void mini2440_parse_features(
            struct mini2440_features_t * features,
            const char * features_str )
{
      const char * fp = features_str;

      features->count = 0;
      features->done = 0;
      features->lcd_index = -1;

      while (*fp) {
            char f = *fp++;

            switch (f) {
            case '0'...'9':   /* tft screen */
                  if (features->done & FEATURE_SCREEN) {
                        printk(KERN_INFO "MINI2440: '%c' ignored, "
                              "screen type already set\n", f);
                  } else {
                        int li = f - '0';
                        if (li >= ARRAY_SIZE(mini2440_lcd_cfg))
                              printk(KERN_INFO "MINI2440: "
                                    "'%c' out of range LCD mode\n", f);
                        else {
                              features->optional[features->count++] =
                                          &s3c_device_lcd;
                              features->lcd_index = li;
                        }
                  }
                  features->done |= FEATURE_SCREEN;
                  break;
            case 'b':
                  if (features->done & FEATURE_BACKLIGHT)
                        printk(KERN_INFO "MINI2440: '%c' ignored, "
                              "backlight already set\n", f);
                  else {
                        features->optional[features->count++] =
                                    &mini2440_led_backlight;
                  }
                  features->done |= FEATURE_BACKLIGHT;
                  break;
            case 't':
                  printk(KERN_INFO "MINI2440: '%c' ignored, "
                        "touchscreen not compiled in\n", f);
                  break;
            case 'c':
                  if (features->done & FEATURE_CAMERA)
                        printk(KERN_INFO "MINI2440: '%c' ignored, "
                              "camera already registered\n", f);
                  else
                        features->optional[features->count++] =
                              &s3c_device_camif;
                  features->done |= FEATURE_CAMERA;
                  break;
            }
      }
}

static void __init mini2440_init(void)
{
      struct mini2440_features_t features = { 0 };
      int i;

      printk(KERN_INFO "MINI2440: Option string mini2440=%s\n",
                  mini2440_features_str);

      /* Parse the feature string */
      mini2440_parse_features(&features, mini2440_features_str);

      /* turn LCD on */
      s3c2410_gpio_cfgpin(S3C2410_GPC(0), S3C2410_GPC0_LEND);

      /* Turn the backlight early on */
      s3c2410_gpio_setpin(S3C2410_GPG(4), 1);
      s3c2410_gpio_cfgpin(S3C2410_GPG(4), S3C2410_GPIO_OUTPUT);

      /* remove pullup on optional PWM backlight -- unused on 3.5 and 7"s */
      s3c2410_gpio_pullup(S3C2410_GPB(1), 0);
      s3c2410_gpio_setpin(S3C2410_GPB(1), 0);
      s3c2410_gpio_cfgpin(S3C2410_GPB(1), S3C2410_GPIO_INPUT);

      /* Make sure the D+ pullup pin is output */
      s3c2410_gpio_cfgpin(S3C2410_GPC(5), S3C2410_GPIO_OUTPUT);

      /* mark the key as input, without pullups (there is one on the board) */
      for (i = 0; i < ARRAY_SIZE(mini2440_buttons); i++) {
            s3c2410_gpio_pullup(mini2440_buttons[i].gpio, 0);
            s3c2410_gpio_cfgpin(mini2440_buttons[i].gpio,
                              S3C2410_GPIO_INPUT);
      }
      if (features.lcd_index != -1) {
            int li;

            mini2440_fb_info.displays =
                  &mini2440_lcd_cfg[features.lcd_index];

            printk(KERN_INFO "MINI2440: LCD");
            for (li = 0; li < ARRAY_SIZE(mini2440_lcd_cfg); li++)
                  if (li == features.lcd_index)
                        printk(" [%d:%dx%d]", li,
                              mini2440_lcd_cfg[li].width,
                              mini2440_lcd_cfg[li].height);
                  else
                        printk(" %d:%dx%d", li,
                              mini2440_lcd_cfg[li].width,
                              mini2440_lcd_cfg[li].height);
            printk("\n");
            s3c24xx_fb_set_platdata(&mini2440_fb_info);
      }
      s3c24xx_udc_set_platdata(&mini2440_udc_cfg);
      s3c_i2c0_set_platdata(NULL);
      i2c_register_board_info(0, mini2440_i2c_devs,
                        ARRAY_SIZE(mini2440_i2c_devs));

      platform_add_devices(mini2440_devices, ARRAY_SIZE(mini2440_devices));

      if (features.count)     /* the optional features */
            platform_add_devices(features.optional, features.count);

}


MACHINE_START(MINI2440, "MINI2440")
      /* Maintainer: Michel Pollet <buserror@gmail.com> */
      .phys_io    = S3C2410_PA_UART,
      .io_pg_offst      = (((u32)S3C24XX_VA_UART) >> 18) & 0xfffc,
      .boot_params      = S3C2410_SDRAM_PA + 0x100,
      .map_io           = mini2440_map_io,
      .init_machine     = mini2440_init,
      .init_irq   = s3c24xx_init_irq,
      .timer            = &s3c24xx_timer,
MACHINE_END

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