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board-omap3beagle.c

/*
 * linux/arch/arm/mach-omap2/board-omap3beagle.c
 *
 * Copyright (C) 2008 Texas Instruments
 *
 * Modified from mach-omap2/board-3430sdp.c
 *
 * Initial code: Syed Mohammed Khasim
 *
 * 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 <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/display.h>
#include <plat/panel-generic-dpi.h>
#include <plat/gpmc.h>
#include <plat/nand.h>
#include <plat/usb.h>

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

#define NAND_BLOCK_SIZE       SZ_128K

/*
 * OMAP3 Beagle revision
 * Run time detection of Beagle revision is done by reading GPIO.
 * GPIO ID -
 *    AXBX  = GPIO173, GPIO172, GPIO171: 1 1 1
 *    C1_3  = GPIO173, GPIO172, GPIO171: 1 1 0
 *    C4    = GPIO173, GPIO172, GPIO171: 1 0 1
 *    XM    = GPIO173, GPIO172, GPIO171: 0 0 0
 */
enum {
      OMAP3BEAGLE_BOARD_UNKN = 0,
      OMAP3BEAGLE_BOARD_AXBX,
      OMAP3BEAGLE_BOARD_C1_3,
      OMAP3BEAGLE_BOARD_C4,
      OMAP3BEAGLE_BOARD_XM,
};

static u8 omap3_beagle_version;

static u8 omap3_beagle_get_rev(void)
{
      return omap3_beagle_version;
}

static void __init omap3_beagle_init_rev(void)
{
      int ret;
      u16 beagle_rev = 0;

      omap_mux_init_gpio(171, OMAP_PIN_INPUT_PULLUP);
      omap_mux_init_gpio(172, OMAP_PIN_INPUT_PULLUP);
      omap_mux_init_gpio(173, OMAP_PIN_INPUT_PULLUP);

      ret = gpio_request(171, "rev_id_0");
      if (ret < 0)
            goto fail0;

      ret = gpio_request(172, "rev_id_1");
      if (ret < 0)
            goto fail1;

      ret = gpio_request(173, "rev_id_2");
      if (ret < 0)
            goto fail2;

      gpio_direction_input(171);
      gpio_direction_input(172);
      gpio_direction_input(173);

      beagle_rev = gpio_get_value(171) | (gpio_get_value(172) << 1)
                  | (gpio_get_value(173) << 2);

      switch (beagle_rev) {
      case 7:
            printk(KERN_INFO "OMAP3 Beagle Rev: Ax/Bx\n");
            omap3_beagle_version = OMAP3BEAGLE_BOARD_AXBX;
            break;
      case 6:
            printk(KERN_INFO "OMAP3 Beagle Rev: C1/C2/C3\n");
            omap3_beagle_version = OMAP3BEAGLE_BOARD_C1_3;
            break;
      case 5:
            printk(KERN_INFO "OMAP3 Beagle Rev: C4\n");
            omap3_beagle_version = OMAP3BEAGLE_BOARD_C4;
            break;
      case 0:
            printk(KERN_INFO "OMAP3 Beagle Rev: xM\n");
            omap3_beagle_version = OMAP3BEAGLE_BOARD_XM;
            break;
      default:
            printk(KERN_INFO "OMAP3 Beagle Rev: unknown %hd\n", beagle_rev);
            omap3_beagle_version = OMAP3BEAGLE_BOARD_UNKN;
      }

      return;

fail2:
      gpio_free(172);
fail1:
      gpio_free(171);
fail0:
      printk(KERN_ERR "Unable to get revision detection GPIO pins\n");
      omap3_beagle_version = OMAP3BEAGLE_BOARD_UNKN;

      return;
}

static struct mtd_partition omap3beagle_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 omap3beagle_nand_data = {
      .options    = NAND_BUSWIDTH_16,
      .parts            = omap3beagle_nand_partitions,
      .nr_parts   = ARRAY_SIZE(omap3beagle_nand_partitions),
      .dma_channel      = -1,       /* disable DMA in OMAP NAND driver */
      .nand_setup = NULL,
      .dev_ready  = NULL,
};

/* DSS */

static int beagle_enable_dvi(struct omap_dss_device *dssdev)
{
      if (gpio_is_valid(dssdev->reset_gpio))
            gpio_set_value(dssdev->reset_gpio, 1);

      return 0;
}

static void beagle_disable_dvi(struct omap_dss_device *dssdev)
{
      if (gpio_is_valid(dssdev->reset_gpio))
            gpio_set_value(dssdev->reset_gpio, 0);
}

static struct panel_generic_dpi_data dvi_panel = {
      .name = "generic",
      .platform_enable = beagle_enable_dvi,
      .platform_disable = beagle_disable_dvi,
};

static struct omap_dss_device beagle_dvi_device = {
      .type = OMAP_DISPLAY_TYPE_DPI,
      .name = "dvi",
      .driver_name = "generic_dpi_panel",
      .data = &dvi_panel,
      .phy.dpi.data_lines = 24,
      .reset_gpio = -EINVAL,
};

static struct omap_dss_device beagle_tv_device = {
      .name = "tv",
      .driver_name = "venc",
      .type = OMAP_DISPLAY_TYPE_VENC,
      .phy.venc.type = OMAP_DSS_VENC_TYPE_SVIDEO,
};

static struct omap_dss_device *beagle_dss_devices[] = {
      &beagle_dvi_device,
      &beagle_tv_device,
};

static struct omap_dss_board_info beagle_dss_data = {
      .num_devices = ARRAY_SIZE(beagle_dss_devices),
      .devices = beagle_dss_devices,
      .default_device = &beagle_dvi_device,
};

static struct platform_device beagle_dss_device = {
      .name          = "omapdss",
      .id            = -1,
      .dev            = {
            .platform_data = &beagle_dss_data,
      },
};

static struct regulator_consumer_supply beagle_vdac_supply =
      REGULATOR_SUPPLY("vdda_dac", "omapdss");

static struct regulator_consumer_supply beagle_vdds_supplies[] = {
      REGULATOR_SUPPLY("vdds_dsi", "omapdss"),
      REGULATOR_SUPPLY("vdds_sdi", "omapdss"),
};

static void __init beagle_display_init(void)
{
      int r;

      /* DVI reset GPIO is different between beagle revisions */
      if (omap3_beagle_get_rev() == OMAP3BEAGLE_BOARD_XM)
            beagle_dvi_device.reset_gpio = 129;
      else
            beagle_dvi_device.reset_gpio = 170;

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

      gpio_direction_output(beagle_dvi_device.reset_gpio, 0);
}

#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 regulator_consumer_supply beagle_vmmc1_supply = {
      .supply                 = "vmmc",
};

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

static struct gpio_led gpio_leds[];

static int beagle_twl_gpio_setup(struct device *dev,
            unsigned gpio, unsigned ngpio)
{
      int r;

      if (omap3_beagle_get_rev() == OMAP3BEAGLE_BOARD_XM) {
            mmc[0].gpio_wp = -EINVAL;
      } else if ((omap3_beagle_get_rev() == OMAP3BEAGLE_BOARD_C1_3) ||
            (omap3_beagle_get_rev() == OMAP3BEAGLE_BOARD_C4)) {
            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 */
      beagle_vmmc1_supply.dev = mmc[0].dev;
      beagle_vsim_supply.dev = mmc[0].dev;

      /* REVISIT: need ehci-omap hooks for external VBUS
       * power switch and overcurrent detect
       */
      if (omap3_beagle_get_rev() != OMAP3BEAGLE_BOARD_XM) {
            r = gpio_request(gpio + 1, "EHCI_nOC");
            if (!r) {
                  r = gpio_direction_input(gpio + 1);
                  if (r)
                        gpio_free(gpio + 1);
            }
            if (r)
                  pr_err("%s: unable to configure EHCI_nOC\n", __func__);
      }

      /*
       * TWL4030_GPIO_MAX + 0 == ledA, EHCI nEN_USB_PWR (out, XM active
       * high / others active low)
       */
      gpio_request(gpio + TWL4030_GPIO_MAX, "nEN_USB_PWR");
      if (omap3_beagle_get_rev() == OMAP3BEAGLE_BOARD_XM)
            gpio_direction_output(gpio + TWL4030_GPIO_MAX, 1);
      else
            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;

      /*
       * gpio + 1 on Xm controls the TFP410's enable line (active low)
       * gpio + 2 control varies depending on the board rev as follows:
       * P7/P8 revisions(prototype): Camera EN
       * A2+ revisions (production): LDO (supplies DVI, serial, led blocks)
       */
      if (omap3_beagle_get_rev() == OMAP3BEAGLE_BOARD_XM) {
            r = gpio_request(gpio + 1, "nDVI_PWR_EN");
            if (!r) {
                  r = gpio_direction_output(gpio + 1, 0);
                  if (r)
                        gpio_free(gpio + 1);
            }
            if (r)
                  pr_err("%s: unable to configure nDVI_PWR_EN\n",
                        __func__);
            r = gpio_request(gpio + 2, "DVI_LDO_EN");
            if (!r) {
                  r = gpio_direction_output(gpio + 2, 1);
                  if (r)
                        gpio_free(gpio + 2);
            }
            if (r)
                  pr_err("%s: unable to configure DVI_LDO_EN\n",
                        __func__);
      }

      return 0;
}

static struct twl4030_gpio_platform_data beagle_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            = beagle_twl_gpio_setup,
};

/* VMMC1 for MMC1 pins CMD, CLK, DAT0..DAT3 (20 mA, plus card == max 220 mA) */
static struct regulator_init_data beagle_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      = &beagle_vmmc1_supply,
};

/* VSIM for MMC1 pins DAT4..DAT7 (2 mA, plus card == max 50 mA) */
static struct regulator_init_data beagle_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      = &beagle_vsim_supply,
};

/* VDAC for DSS driving S-Video (8 mA unloaded, max 65 mA) */
static struct regulator_init_data beagle_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      = &beagle_vdac_supply,
};

/* VPLL2 for digital video outputs */
static struct regulator_init_data beagle_vpll2 = {
      .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  = ARRAY_SIZE(beagle_vdds_supplies),
      .consumer_supplies      = beagle_vdds_supplies,
};

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

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

static struct twl4030_codec_data beagle_codec_data = {
      .audio_mclk = 26000000,
      .audio = &beagle_audio_data,
};

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

      /* platform_data for children goes here */
      .usb        = &beagle_usb_data,
      .gpio       = &beagle_gpio_data,
      .codec            = &beagle_codec_data,
      .vmmc1            = &beagle_vmmc1,
      .vsim       = &beagle_vsim,
      .vdac       = &beagle_vdac,
      .vpll2            = &beagle_vpll2,
};

static struct i2c_board_info __initdata beagle_i2c_boardinfo[] = {
      {
            I2C_BOARD_INFO("twl4030", 0x48),
            .flags = I2C_CLIENT_WAKE,
            .irq = INT_34XX_SYS_NIRQ,
            .platform_data = &beagle_twldata,
      },
};

static struct i2c_board_info __initdata beagle_i2c_eeprom[] = {
       {
               I2C_BOARD_INFO("eeprom", 0x50),
       },
};

static int __init omap3_beagle_i2c_init(void)
{
      omap_register_i2c_bus(1, 2600, beagle_i2c_boardinfo,
                  ARRAY_SIZE(beagle_i2c_boardinfo));
      /* Bus 3 is attached to the DVI port where devices like the pico DLP
       * projector don't work reliably with 400kHz */
      omap_register_i2c_bus(3, 100, beagle_i2c_eeprom, ARRAY_SIZE(beagle_i2c_eeprom));
      return 0;
}

static struct gpio_led gpio_leds[] = {
      {
            .name             = "beagleboard::usr0",
            .default_trigger  = "heartbeat",
            .gpio             = 150,
      },
      {
            .name             = "beagleboard::usr1",
            .default_trigger  = "mmc0",
            .gpio             = 149,
      },
      {
            .name             = "beagleboard::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,
      },
};

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 void __init omap3_beagle_init_irq(void)
{
      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_beagle_devices[] __initdata = {
      &leds_gpio,
      &keys_gpio,
      &beagle_dss_device,
};

static void __init omap3beagle_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) {
            omap3beagle_nand_data.cs = nandcs;

            printk(KERN_INFO "Registering NAND on CS%d\n", nandcs);
            if (gpmc_nand_init(&omap3beagle_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
};

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

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

static void __init omap3_beagle_init(void)
{
      omap3_mux_init(board_mux, OMAP_PACKAGE_CBB);
      omap3_beagle_init_rev();
      omap3_beagle_i2c_init();
      platform_add_devices(omap3_beagle_devices,
                  ARRAY_SIZE(omap3_beagle_devices));
      omap_serial_init();

      usb_musb_init(&musb_board_data);
      usb_ehci_init(&ehci_pdata);
      omap3beagle_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);

      beagle_display_init();
}

MACHINE_START(OMAP3_BEAGLE, "OMAP3 Beagle Board")
      /* Maintainer: Syed Mohammed Khasim - http://beagleboard.org */
      .boot_params      = 0x80000100,
      .map_io           = omap3_map_io,
      .reserve    = omap_reserve,
      .init_irq   = omap3_beagle_init_irq,
      .init_machine     = omap3_beagle_init,
      .timer            = &omap_timer,
MACHINE_END

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