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board-omap3touchbook.c

/*
 * linux/arch/arm/mach-omap2/board-omap3touchbook.c
 *
 * Copyright (C) 2009 Always Innovating
 *
 * Modified from mach-omap2/board-omap3beagleboard.c
 *
 * Initial code: Grégoire Gentil, Tim Yamin
 *
 * 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/platform_device.h>
#include <linux/delay.h>
#include <linux/err.h>
#include <linux/clk.h>
#include <linux/io.h>
#include <linux/leds.h>
#include <linux/gpio.h>
#include <linux/input.h>
#include <linux/gpio_keys.h>

#include <linux/mtd/mtd.h>
#include <linux/mtd/partitions.h>
#include <linux/mtd/nand.h>
#include <linux/mmc/host.h>

#include <plat/mcspi.h>
#include <linux/spi/spi.h>

#include <linux/spi/ads7846.h>

#include <linux/regulator/machine.h>
#include <linux/i2c/twl.h>

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

#include <plat/board.h>
#include <plat/common.h>
#include <plat/gpmc.h>
#include <plat/nand.h>
#include <plat/usb.h>

#include "mux.h"
#include "hsmmc.h"
#include "timer-gp.h"

#include <asm/setup.h>

#define NAND_BLOCK_SIZE       SZ_128K

#define OMAP3_AC_GPIO         136
#define OMAP3_TS_GPIO         162
#define TB_BL_PWM_TIMER       9
#define TB_KILL_POWER_GPIO    168

static unsigned long touchbook_revision;

static struct mtd_partition omap3touchbook_nand_partitions[] = {
      /* All the partition sizes are listed in terms of NAND block size */
      {
            .name       = "X-Loader",
            .offset           = 0,
            .size       = 4 * NAND_BLOCK_SIZE,
            .mask_flags = MTD_WRITEABLE,  /* force read-only */
      },
      {
            .name       = "U-Boot",
            .offset           = MTDPART_OFS_APPEND,   /* Offset = 0x80000 */
            .size       = 15 * NAND_BLOCK_SIZE,
            .mask_flags = MTD_WRITEABLE,  /* force read-only */
      },
      {
            .name       = "U-Boot Env",
            .offset           = MTDPART_OFS_APPEND,   /* Offset = 0x260000 */
            .size       = 1 * NAND_BLOCK_SIZE,
      },
      {
            .name       = "Kernel",
            .offset           = MTDPART_OFS_APPEND,   /* Offset = 0x280000 */
            .size       = 32 * NAND_BLOCK_SIZE,
      },
      {
            .name       = "File System",
            .offset           = MTDPART_OFS_APPEND,   /* Offset = 0x680000 */
            .size       = MTDPART_SIZ_FULL,
      },
};

static struct omap_nand_platform_data omap3touchbook_nand_data = {
      .options    = NAND_BUSWIDTH_16,
      .parts            = omap3touchbook_nand_partitions,
      .nr_parts   = ARRAY_SIZE(omap3touchbook_nand_partitions),
      .dma_channel      = -1,       /* disable DMA in OMAP NAND driver */
      .nand_setup = NULL,
      .dev_ready  = NULL,
};

#include "sdram-micron-mt46h32m32lf-6.h"

static struct omap2_hsmmc_info mmc[] = {
      {
            .mmc        = 1,
            .caps       = MMC_CAP_4_BIT_DATA | MMC_CAP_8_BIT_DATA,
            .gpio_wp    = 29,
      },
      {}    /* Terminator */
};

static struct platform_device omap3_touchbook_lcd_device = {
      .name       = "omap3touchbook_lcd",
      .id         = -1,
};

static struct omap_lcd_config omap3_touchbook_lcd_config __initdata = {
      .ctrl_name  = "internal",
};

static struct regulator_consumer_supply touchbook_vmmc1_supply = {
      .supply                 = "vmmc",
};

static struct regulator_consumer_supply touchbook_vsim_supply = {
      .supply                 = "vmmc_aux",
};

static struct gpio_led gpio_leds[];

static int touchbook_twl_gpio_setup(struct device *dev,
            unsigned gpio, unsigned ngpio)
{
      if (system_rev >= 0x20 && system_rev <= 0x34301000) {
            omap_mux_init_gpio(23, OMAP_PIN_INPUT);
            mmc[0].gpio_wp = 23;
      } else {
            omap_mux_init_gpio(29, OMAP_PIN_INPUT);
      }
      /* gpio + 0 is "mmc0_cd" (input/IRQ) */
      mmc[0].gpio_cd = gpio + 0;
      omap2_hsmmc_init(mmc);

      /* link regulators to MMC adapters */
      touchbook_vmmc1_supply.dev = mmc[0].dev;
      touchbook_vsim_supply.dev = mmc[0].dev;

      /* REVISIT: need ehci-omap hooks for external VBUS
       * power switch and overcurrent detect
       */

      gpio_request(gpio + 1, "EHCI_nOC");
      gpio_direction_input(gpio + 1);

      /* TWL4030_GPIO_MAX + 0 == ledA, EHCI nEN_USB_PWR (out, active low) */
      gpio_request(gpio + TWL4030_GPIO_MAX, "nEN_USB_PWR");
      gpio_direction_output(gpio + TWL4030_GPIO_MAX, 0);

      /* TWL4030_GPIO_MAX + 1 == ledB, PMU_STAT (out, active low LED) */
      gpio_leds[2].gpio = gpio + TWL4030_GPIO_MAX + 1;

      return 0;
}

static struct twl4030_gpio_platform_data touchbook_gpio_data = {
      .gpio_base  = OMAP_MAX_GPIO_LINES,
      .irq_base   = TWL4030_GPIO_IRQ_BASE,
      .irq_end    = TWL4030_GPIO_IRQ_END,
      .use_leds   = true,
      .pullups    = BIT(1),
      .pulldowns  = BIT(2) | BIT(6) | BIT(7) | BIT(8) | BIT(13)
                        | BIT(15) | BIT(16) | BIT(17),
      .setup            = touchbook_twl_gpio_setup,
};

static struct regulator_consumer_supply touchbook_vdac_supply = {
      .supply           = "vdac",
      .dev        = &omap3_touchbook_lcd_device.dev,
};

static struct regulator_consumer_supply touchbook_vdvi_supply = {
      .supply           = "vdvi",
      .dev        = &omap3_touchbook_lcd_device.dev,
};

/* VMMC1 for MMC1 pins CMD, CLK, DAT0..DAT3 (20 mA, plus card == max 220 mA) */
static struct regulator_init_data touchbook_vmmc1 = {
      .constraints = {
            .min_uV                 = 1850000,
            .max_uV                 = 3150000,
            .valid_modes_mask = REGULATOR_MODE_NORMAL
                              | REGULATOR_MODE_STANDBY,
            .valid_ops_mask         = REGULATOR_CHANGE_VOLTAGE
                              | REGULATOR_CHANGE_MODE
                              | REGULATOR_CHANGE_STATUS,
      },
      .num_consumer_supplies  = 1,
      .consumer_supplies      = &touchbook_vmmc1_supply,
};

/* VSIM for MMC1 pins DAT4..DAT7 (2 mA, plus card == max 50 mA) */
static struct regulator_init_data touchbook_vsim = {
      .constraints = {
            .min_uV                 = 1800000,
            .max_uV                 = 3000000,
            .valid_modes_mask = REGULATOR_MODE_NORMAL
                              | REGULATOR_MODE_STANDBY,
            .valid_ops_mask         = REGULATOR_CHANGE_VOLTAGE
                              | REGULATOR_CHANGE_MODE
                              | REGULATOR_CHANGE_STATUS,
      },
      .num_consumer_supplies  = 1,
      .consumer_supplies      = &touchbook_vsim_supply,
};

/* VDAC for DSS driving S-Video (8 mA unloaded, max 65 mA) */
static struct regulator_init_data touchbook_vdac = {
      .constraints = {
            .min_uV                 = 1800000,
            .max_uV                 = 1800000,
            .valid_modes_mask = REGULATOR_MODE_NORMAL
                              | REGULATOR_MODE_STANDBY,
            .valid_ops_mask         = REGULATOR_CHANGE_MODE
                              | REGULATOR_CHANGE_STATUS,
      },
      .num_consumer_supplies  = 1,
      .consumer_supplies      = &touchbook_vdac_supply,
};

/* VPLL2 for digital video outputs */
static struct regulator_init_data touchbook_vpll2 = {
      .constraints = {
            .name             = "VDVI",
            .min_uV                 = 1800000,
            .max_uV                 = 1800000,
            .valid_modes_mask = REGULATOR_MODE_NORMAL
                              | REGULATOR_MODE_STANDBY,
            .valid_ops_mask         = REGULATOR_CHANGE_MODE
                              | REGULATOR_CHANGE_STATUS,
      },
      .num_consumer_supplies  = 1,
      .consumer_supplies      = &touchbook_vdvi_supply,
};

static struct twl4030_usb_data touchbook_usb_data = {
      .usb_mode   = T2_USB_MODE_ULPI,
};

static struct twl4030_codec_audio_data touchbook_audio_data = {
      .audio_mclk = 26000000,
};

static struct twl4030_codec_data touchbook_codec_data = {
      .audio_mclk = 26000000,
      .audio = &touchbook_audio_data,
};

static struct twl4030_platform_data touchbook_twldata = {
      .irq_base   = TWL4030_IRQ_BASE,
      .irq_end    = TWL4030_IRQ_END,

      /* platform_data for children goes here */
      .usb        = &touchbook_usb_data,
      .gpio       = &touchbook_gpio_data,
      .codec            = &touchbook_codec_data,
      .vmmc1            = &touchbook_vmmc1,
      .vsim       = &touchbook_vsim,
      .vdac       = &touchbook_vdac,
      .vpll2            = &touchbook_vpll2,
};

static struct i2c_board_info __initdata touchbook_i2c_boardinfo[] = {
      {
            I2C_BOARD_INFO("twl4030", 0x48),
            .flags = I2C_CLIENT_WAKE,
            .irq = INT_34XX_SYS_NIRQ,
            .platform_data = &touchbook_twldata,
      },
};

static struct i2c_board_info __initdata touchBook_i2c_boardinfo[] = {
      {
            I2C_BOARD_INFO("bq27200", 0x55),
      },
};

static int __init omap3_touchbook_i2c_init(void)
{
      /* Standard TouchBook bus */
      omap_register_i2c_bus(1, 2600, touchbook_i2c_boardinfo,
                  ARRAY_SIZE(touchbook_i2c_boardinfo));

      /* Additional TouchBook bus */
      omap_register_i2c_bus(3, 100, touchBook_i2c_boardinfo,
                  ARRAY_SIZE(touchBook_i2c_boardinfo));

      return 0;
}

static void __init omap3_ads7846_init(void)
{
      if (gpio_request(OMAP3_TS_GPIO, "ads7846_pen_down")) {
            printk(KERN_ERR "Failed to request GPIO %d for "
                        "ads7846 pen down IRQ\n", OMAP3_TS_GPIO);
            return;
      }

      gpio_direction_input(OMAP3_TS_GPIO);
      gpio_set_debounce(OMAP3_TS_GPIO, 310);
}

static struct ads7846_platform_data ads7846_config = {
      .x_min                  = 100,
      .y_min                  = 265,
      .x_max                  = 3950,
      .y_max                  = 3750,
      .x_plate_ohms           = 40,
      .pressure_max           = 255,
      .debounce_max           = 10,
      .debounce_tol           = 5,
      .debounce_rep           = 1,
      .gpio_pendown           = OMAP3_TS_GPIO,
      .keep_vref_on           = 1,
};

static struct omap2_mcspi_device_config ads7846_mcspi_config = {
      .turbo_mode = 0,
      .single_channel   = 1,  /* 0: slave, 1: master */
};

static struct spi_board_info omap3_ads7846_spi_board_info[] __initdata = {
      {
            .modalias         = "ads7846",
            .bus_num          = 4,
            .chip_select            = 0,
            .max_speed_hz           = 1500000,
            .controller_data  = &ads7846_mcspi_config,
            .irq              = OMAP_GPIO_IRQ(OMAP3_TS_GPIO),
            .platform_data          = &ads7846_config,
      }
};

static struct gpio_led gpio_leds[] = {
      {
            .name             = "touchbook::usr0",
            .default_trigger  = "heartbeat",
            .gpio             = 150,
      },
      {
            .name             = "touchbook::usr1",
            .default_trigger  = "mmc0",
            .gpio             = 149,
      },
      {
            .name             = "touchbook::pmu_stat",
            .gpio             = -EINVAL,  /* gets replaced */
            .active_low       = true,
      },
};

static struct gpio_led_platform_data gpio_led_info = {
      .leds       = gpio_leds,
      .num_leds   = ARRAY_SIZE(gpio_leds),
};

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

static struct gpio_keys_button gpio_buttons[] = {
      {
            .code             = BTN_EXTRA,
            .gpio             = 7,
            .desc             = "user",
            .wakeup                 = 1,
      },
      {
            .code             = KEY_POWER,
            .gpio             = 183,
            .desc             = "power",
            .wakeup                 = 1,
      },
};

static struct gpio_keys_platform_data gpio_key_info = {
      .buttons    = gpio_buttons,
      .nbuttons   = ARRAY_SIZE(gpio_buttons),
};

static struct platform_device keys_gpio = {
      .name = "gpio-keys",
      .id   = -1,
      .dev  = {
            .platform_data    = &gpio_key_info,
      },
};

static struct omap_board_config_kernel omap3_touchbook_config[] __initdata = {
      { OMAP_TAG_LCD,         &omap3_touchbook_lcd_config },
};

#ifdef CONFIG_OMAP_MUX
static struct omap_board_mux board_mux[] __initdata = {
      { .reg_offset = OMAP_MUX_TERMINATOR },
};
#endif

static void __init omap3_touchbook_init_irq(void)
{
      omap3_mux_init(board_mux, OMAP_PACKAGE_CBB);
      omap_board_config = omap3_touchbook_config;
      omap_board_config_size = ARRAY_SIZE(omap3_touchbook_config);
      omap2_init_common_infrastructure();
      omap2_init_common_devices(mt46h32m32lf6_sdrc_params,
                          mt46h32m32lf6_sdrc_params);
      omap_init_irq();
#ifdef CONFIG_OMAP_32K_TIMER
      omap2_gp_clockevent_set_gptimer(12);
#endif
}

static struct platform_device *omap3_touchbook_devices[] __initdata = {
      &omap3_touchbook_lcd_device,
      &leds_gpio,
      &keys_gpio,
};

static void __init omap3touchbook_flash_init(void)
{
      u8 cs = 0;
      u8 nandcs = GPMC_CS_NUM + 1;

      /* find out the chip-select on which NAND exists */
      while (cs < GPMC_CS_NUM) {
            u32 ret = 0;
            ret = gpmc_cs_read_reg(cs, GPMC_CS_CONFIG1);

            if ((ret & 0xC00) == 0x800) {
                  printk(KERN_INFO "Found NAND on CS%d\n", cs);
                  if (nandcs > GPMC_CS_NUM)
                        nandcs = cs;
            }
            cs++;
      }

      if (nandcs > GPMC_CS_NUM) {
            printk(KERN_INFO "NAND: Unable to find configuration "
                         "in GPMC\n ");
            return;
      }

      if (nandcs < GPMC_CS_NUM) {
            omap3touchbook_nand_data.cs = nandcs;

            printk(KERN_INFO "Registering NAND on CS%d\n", nandcs);
            if (gpmc_nand_init(&omap3touchbook_nand_data) < 0)
                  printk(KERN_ERR "Unable to register NAND device\n");
      }
}

static const struct ehci_hcd_omap_platform_data ehci_pdata __initconst = {

      .port_mode[0] = EHCI_HCD_OMAP_MODE_PHY,
      .port_mode[1] = EHCI_HCD_OMAP_MODE_PHY,
      .port_mode[2] = EHCI_HCD_OMAP_MODE_UNKNOWN,

      .phy_reset  = true,
      .reset_gpio_port[0]  = -EINVAL,
      .reset_gpio_port[1]  = 147,
      .reset_gpio_port[2]  = -EINVAL
};

static void omap3_touchbook_poweroff(void)
{
      int r;

      r = gpio_request(TB_KILL_POWER_GPIO, "DVI reset");
      if (r < 0) {
            printk(KERN_ERR "Unable to get kill power GPIO\n");
            return;
      }

      gpio_direction_output(TB_KILL_POWER_GPIO, 0);
}

static int __init early_touchbook_revision(char *p)
{
      if (!p)
            return 0;

      return strict_strtoul(p, 10, &touchbook_revision);
}
early_param("tbr", early_touchbook_revision);

static struct omap_musb_board_data musb_board_data = {
      .interface_type         = MUSB_INTERFACE_ULPI,
      .mode             = MUSB_OTG,
      .power                  = 100,
};

static void __init omap3_touchbook_init(void)
{
      pm_power_off = omap3_touchbook_poweroff;

      omap3_touchbook_i2c_init();
      platform_add_devices(omap3_touchbook_devices,
                  ARRAY_SIZE(omap3_touchbook_devices));
      omap_serial_init();

      omap_mux_init_gpio(170, OMAP_PIN_INPUT);
      gpio_request(176, "DVI_nPD");
      /* REVISIT leave DVI powered down until it's needed ... */
      gpio_direction_output(176, true);

      /* Touchscreen and accelerometer */
      spi_register_board_info(omap3_ads7846_spi_board_info,
                        ARRAY_SIZE(omap3_ads7846_spi_board_info));
      omap3_ads7846_init();
      usb_musb_init(&musb_board_data);
      usb_ehci_init(&ehci_pdata);
      omap3touchbook_flash_init();

      /* Ensure SDRC pins are mux'd for self-refresh */
      omap_mux_init_signal("sdrc_cke0", OMAP_PIN_OUTPUT);
      omap_mux_init_signal("sdrc_cke1", OMAP_PIN_OUTPUT);
}

MACHINE_START(TOUCHBOOK, "OMAP3 touchbook Board")
      /* Maintainer: Gregoire Gentil - http://www.alwaysinnovating.com */
      .boot_params      = 0x80000100,
      .map_io           = omap3_map_io,
      .reserve    = omap_reserve,
      .init_irq   = omap3_touchbook_init_irq,
      .init_machine     = omap3_touchbook_init,
      .timer            = &omap_timer,
MACHINE_END

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