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board-n8x0.c

/*
 * linux/arch/arm/mach-omap2/board-n8x0.c
 *
 * Copyright (C) 2005-2009 Nokia Corporation
 * Author: Juha Yrjola <juha.yrjola@nokia.com>
 *
 * Modified from mach-omap2/board-generic.c
 *
 * 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/clk.h>
#include <linux/delay.h>
#include <linux/gpio.h>
#include <linux/init.h>
#include <linux/io.h>
#include <linux/stddef.h>
#include <linux/i2c.h>
#include <linux/spi/spi.h>
#include <linux/usb/musb.h>
#include <sound/tlv320aic3x.h>

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

#include <plat/board.h>
#include <plat/common.h>
#include <plat/menelaus.h>
#include <mach/irqs.h>
#include <plat/mcspi.h>
#include <plat/onenand.h>
#include <plat/mmc.h>
#include <plat/serial.h>

#include "mux.h"

static int slot1_cover_open;
static int slot2_cover_open;
static struct device *mmc_device;

#define TUSB6010_ASYNC_CS     1
#define TUSB6010_SYNC_CS      4
#define TUSB6010_GPIO_INT     58
#define TUSB6010_GPIO_ENABLE  0
#define TUSB6010_DMACHAN      0x3f

#ifdef CONFIG_USB_MUSB_TUSB6010
/*
 * Enable or disable power to TUSB6010. When enabling, turn on 3.3 V and
 * 1.5 V voltage regulators of PM companion chip. Companion chip will then
 * provide then PGOOD signal to TUSB6010 which will release it from reset.
 */
static int tusb_set_power(int state)
{
      int i, retval = 0;

      if (state) {
            gpio_set_value(TUSB6010_GPIO_ENABLE, 1);
            msleep(1);

            /* Wait until TUSB6010 pulls INT pin down */
            i = 100;
            while (i && gpio_get_value(TUSB6010_GPIO_INT)) {
                  msleep(1);
                  i--;
            }

            if (!i) {
                  printk(KERN_ERR "tusb: powerup failed\n");
                  retval = -ENODEV;
            }
      } else {
            gpio_set_value(TUSB6010_GPIO_ENABLE, 0);
            msleep(10);
      }

      return retval;
}

static struct musb_hdrc_config musb_config = {
      .multipoint = 1,
      .dyn_fifo   = 1,
      .num_eps    = 16,
      .ram_bits   = 12,
};

static struct musb_hdrc_platform_data tusb_data = {
#if defined(CONFIG_USB_MUSB_OTG)
      .mode       = MUSB_OTG,
#elif defined(CONFIG_USB_MUSB_PERIPHERAL)
      .mode       = MUSB_PERIPHERAL,
#else /* defined(CONFIG_USB_MUSB_HOST) */
      .mode       = MUSB_HOST,
#endif
      .set_power  = tusb_set_power,
      .min_power  = 25, /* x2 = 50 mA drawn from VBUS as peripheral */
      .power            = 100,      /* Max 100 mA VBUS for host mode */
      .config           = &musb_config,
};

static void __init n8x0_usb_init(void)
{
      int ret = 0;
      static char announce[] __initdata = KERN_INFO "TUSB 6010\n";

      /* PM companion chip power control pin */
      ret = gpio_request(TUSB6010_GPIO_ENABLE, "TUSB6010 enable");
      if (ret != 0) {
            printk(KERN_ERR "Could not get TUSB power GPIO%i\n",
                   TUSB6010_GPIO_ENABLE);
            return;
      }
      gpio_direction_output(TUSB6010_GPIO_ENABLE, 0);

      tusb_set_power(0);

      ret = tusb6010_setup_interface(&tusb_data, TUSB6010_REFCLK_19, 2,
                              TUSB6010_ASYNC_CS, TUSB6010_SYNC_CS,
                              TUSB6010_GPIO_INT, TUSB6010_DMACHAN);
      if (ret != 0)
            goto err;

      printk(announce);

      return;

err:
      gpio_free(TUSB6010_GPIO_ENABLE);
}
#else

static void __init n8x0_usb_init(void) {}

#endif /*CONFIG_USB_MUSB_TUSB6010 */


static struct omap2_mcspi_device_config p54spi_mcspi_config = {
      .turbo_mode = 0,
      .single_channel = 1,
};

static struct spi_board_info n800_spi_board_info[] __initdata = {
      {
            .modalias   = "p54spi",
            .bus_num    = 2,
            .chip_select      = 0,
            .max_speed_hz   = 48000000,
            .controller_data = &p54spi_mcspi_config,
      },
};

#if defined(CONFIG_MTD_ONENAND_OMAP2) || \
      defined(CONFIG_MTD_ONENAND_OMAP2_MODULE)

static struct mtd_partition onenand_partitions[] = {
      {
            .name           = "bootloader",
            .offset         = 0,
            .size           = 0x20000,
            .mask_flags     = MTD_WRITEABLE,    /* Force read-only */
      },
      {
            .name           = "config",
            .offset         = MTDPART_OFS_APPEND,
            .size           = 0x60000,
      },
      {
            .name           = "kernel",
            .offset         = MTDPART_OFS_APPEND,
            .size           = 0x200000,
      },
      {
            .name           = "initfs",
            .offset         = MTDPART_OFS_APPEND,
            .size           = 0x400000,
      },
      {
            .name           = "rootfs",
            .offset         = MTDPART_OFS_APPEND,
            .size           = MTDPART_SIZ_FULL,
      },
};

static struct omap_onenand_platform_data board_onenand_data[] = {
      {
            .cs         = 0,
            .gpio_irq   = 26,
            .parts            = onenand_partitions,
            .nr_parts   = ARRAY_SIZE(onenand_partitions),
            .flags            = ONENAND_SYNC_READ,
      }
};
#endif

#if defined(CONFIG_MENELAUS) &&                                   \
      (defined(CONFIG_MMC_OMAP) || defined(CONFIG_MMC_OMAP_MODULE))

/*
 * On both N800 and N810, only the first of the two MMC controllers is in use.
 * The two MMC slots are multiplexed via Menelaus companion chip over I2C.
 * On N800, both slots are powered via Menelaus. On N810, only one of the
 * slots is powered via Menelaus. The N810 EMMC is powered via GPIO.
 *
 * VMMC                       slot 1 on both N800 and N810
 * VDCDC3_APE and VMCS2_APE   slot 2 on N800
 * GPIO23 and GPIO9           slot 2 EMMC on N810
 *
 */
#define N8X0_SLOT_SWITCH_GPIO 96
#define N810_EMMC_VSD_GPIO    23
#define N810_EMMC_VIO_GPIO    9

static int n8x0_mmc_switch_slot(struct device *dev, int slot)
{
#ifdef CONFIG_MMC_DEBUG
      dev_dbg(dev, "Choose slot %d\n", slot + 1);
#endif
      gpio_set_value(N8X0_SLOT_SWITCH_GPIO, slot);
      return 0;
}

static int n8x0_mmc_set_power_menelaus(struct device *dev, int slot,
                              int power_on, int vdd)
{
      int mV;

#ifdef CONFIG_MMC_DEBUG
      dev_dbg(dev, "Set slot %d power: %s (vdd %d)\n", slot + 1,
            power_on ? "on" : "off", vdd);
#endif
      if (slot == 0) {
            if (!power_on)
                  return menelaus_set_vmmc(0);
            switch (1 << vdd) {
            case MMC_VDD_33_34:
            case MMC_VDD_32_33:
            case MMC_VDD_31_32:
                  mV = 3100;
                  break;
            case MMC_VDD_30_31:
                  mV = 3000;
                  break;
            case MMC_VDD_28_29:
                  mV = 2800;
                  break;
            case MMC_VDD_165_195:
                  mV = 1850;
                  break;
            default:
                  BUG();
            }
            return menelaus_set_vmmc(mV);
      } else {
            if (!power_on)
                  return menelaus_set_vdcdc(3, 0);
            switch (1 << vdd) {
            case MMC_VDD_33_34:
            case MMC_VDD_32_33:
                  mV = 3300;
                  break;
            case MMC_VDD_30_31:
            case MMC_VDD_29_30:
                  mV = 3000;
                  break;
            case MMC_VDD_28_29:
            case MMC_VDD_27_28:
                  mV = 2800;
                  break;
            case MMC_VDD_24_25:
            case MMC_VDD_23_24:
                  mV = 2400;
                  break;
            case MMC_VDD_22_23:
            case MMC_VDD_21_22:
                  mV = 2200;
                  break;
            case MMC_VDD_20_21:
                  mV = 2000;
                  break;
            case MMC_VDD_165_195:
                  mV = 1800;
                  break;
            default:
                  BUG();
            }
            return menelaus_set_vdcdc(3, mV);
      }
      return 0;
}

static void n810_set_power_emmc(struct device *dev,
                               int power_on)
{
      dev_dbg(dev, "Set EMMC power %s\n", power_on ? "on" : "off");

      if (power_on) {
            gpio_set_value(N810_EMMC_VSD_GPIO, 1);
            msleep(1);
            gpio_set_value(N810_EMMC_VIO_GPIO, 1);
            msleep(1);
      } else {
            gpio_set_value(N810_EMMC_VIO_GPIO, 0);
            msleep(50);
            gpio_set_value(N810_EMMC_VSD_GPIO, 0);
            msleep(50);
      }
}

static int n8x0_mmc_set_power(struct device *dev, int slot, int power_on,
                        int vdd)
{
      if (machine_is_nokia_n800() || slot == 0)
            return n8x0_mmc_set_power_menelaus(dev, slot, power_on, vdd);

      n810_set_power_emmc(dev, power_on);

      return 0;
}

static int n8x0_mmc_set_bus_mode(struct device *dev, int slot, int bus_mode)
{
      int r;

      dev_dbg(dev, "Set slot %d bus mode %s\n", slot + 1,
            bus_mode == MMC_BUSMODE_OPENDRAIN ? "open-drain" : "push-pull");
      BUG_ON(slot != 0 && slot != 1);
      slot++;
      switch (bus_mode) {
      case MMC_BUSMODE_OPENDRAIN:
            r = menelaus_set_mmc_opendrain(slot, 1);
            break;
      case MMC_BUSMODE_PUSHPULL:
            r = menelaus_set_mmc_opendrain(slot, 0);
            break;
      default:
            BUG();
      }
      if (r != 0 && printk_ratelimit())
            dev_err(dev, "MMC: unable to set bus mode for slot %d\n",
                  slot);
      return r;
}

static int n8x0_mmc_get_cover_state(struct device *dev, int slot)
{
      slot++;
      BUG_ON(slot != 1 && slot != 2);
      if (slot == 1)
            return slot1_cover_open;
      else
            return slot2_cover_open;
}

static void n8x0_mmc_callback(void *data, u8 card_mask)
{
      int bit, *openp, index;

      if (machine_is_nokia_n800()) {
            bit = 1 << 1;
            openp = &slot2_cover_open;
            index = 1;
      } else {
            bit = 1;
            openp = &slot1_cover_open;
            index = 0;
      }

      if (card_mask & bit)
            *openp = 1;
      else
            *openp = 0;

      omap_mmc_notify_cover_event(mmc_device, index, *openp);
}

static int n8x0_mmc_late_init(struct device *dev)
{
      int r, bit, *openp;
      int vs2sel;

      mmc_device = dev;

      r = menelaus_set_slot_sel(1);
      if (r < 0)
            return r;

      if (machine_is_nokia_n800())
            vs2sel = 0;
      else
            vs2sel = 2;

      r = menelaus_set_mmc_slot(2, 0, vs2sel, 1);
      if (r < 0)
            return r;

      n8x0_mmc_set_power(dev, 0, MMC_POWER_ON, 16); /* MMC_VDD_28_29 */
      n8x0_mmc_set_power(dev, 1, MMC_POWER_ON, 16);

      r = menelaus_set_mmc_slot(1, 1, 0, 1);
      if (r < 0)
            return r;
      r = menelaus_set_mmc_slot(2, 1, vs2sel, 1);
      if (r < 0)
            return r;

      r = menelaus_get_slot_pin_states();
      if (r < 0)
            return r;

      if (machine_is_nokia_n800()) {
            bit = 1 << 1;
            openp = &slot2_cover_open;
      } else {
            bit = 1;
            openp = &slot1_cover_open;
            slot2_cover_open = 0;
      }

      /* All slot pin bits seem to be inversed until first switch change */
      if (r == 0xf || r == (0xf & ~bit))
            r = ~r;

      if (r & bit)
            *openp = 1;
      else
            *openp = 0;

      r = menelaus_register_mmc_callback(n8x0_mmc_callback, NULL);

      return r;
}

static void n8x0_mmc_shutdown(struct device *dev)
{
      int vs2sel;

      if (machine_is_nokia_n800())
            vs2sel = 0;
      else
            vs2sel = 2;

      menelaus_set_mmc_slot(1, 0, 0, 0);
      menelaus_set_mmc_slot(2, 0, vs2sel, 0);
}

static void n8x0_mmc_cleanup(struct device *dev)
{
      menelaus_unregister_mmc_callback();

      gpio_free(N8X0_SLOT_SWITCH_GPIO);

      if (machine_is_nokia_n810()) {
            gpio_free(N810_EMMC_VSD_GPIO);
            gpio_free(N810_EMMC_VIO_GPIO);
      }
}

/*
 * MMC controller1 has two slots that are multiplexed via I2C.
 * MMC controller2 is not in use.
 */
static struct omap_mmc_platform_data mmc1_data = {
      .nr_slots               = 2,
      .switch_slot                  = n8x0_mmc_switch_slot,
      .init                   = n8x0_mmc_late_init,
      .cleanup                = n8x0_mmc_cleanup,
      .shutdown               = n8x0_mmc_shutdown,
      .max_freq               = 24000000,
      .dma_mask               = 0xffffffff,
      .slots[0] = {
            .wires                  = 4,
            .set_power        = n8x0_mmc_set_power,
            .set_bus_mode           = n8x0_mmc_set_bus_mode,
            .get_cover_state  = n8x0_mmc_get_cover_state,
            .ocr_mask         = MMC_VDD_165_195 | MMC_VDD_30_31 |
                                    MMC_VDD_32_33   | MMC_VDD_33_34,
            .name             = "internal",
      },
      .slots[1] = {
            .set_power        = n8x0_mmc_set_power,
            .set_bus_mode           = n8x0_mmc_set_bus_mode,
            .get_cover_state  = n8x0_mmc_get_cover_state,
            .ocr_mask         = MMC_VDD_165_195 | MMC_VDD_20_21 |
                                    MMC_VDD_21_22 | MMC_VDD_22_23 |
                                    MMC_VDD_23_24 | MMC_VDD_24_25 |
                                    MMC_VDD_27_28 | MMC_VDD_28_29 |
                                    MMC_VDD_29_30 | MMC_VDD_30_31 |
                                    MMC_VDD_32_33 | MMC_VDD_33_34,
            .name             = "external",
      },
};

static struct omap_mmc_platform_data *mmc_data[OMAP24XX_NR_MMC];

static void __init n8x0_mmc_init(void)

{
      int err;

      if (machine_is_nokia_n810()) {
            mmc1_data.slots[0].name = "external";

            /*
             * Some Samsung Movinand chips do not like open-ended
             * multi-block reads and fall to braind-dead state
             * while doing so. Reducing the number of blocks in
             * the transfer or delays in clock disable do not help
             */
            mmc1_data.slots[1].name = "internal";
            mmc1_data.slots[1].ban_openended = 1;
      }

      err = gpio_request(N8X0_SLOT_SWITCH_GPIO, "MMC slot switch");
      if (err)
            return;

      gpio_direction_output(N8X0_SLOT_SWITCH_GPIO, 0);

      if (machine_is_nokia_n810()) {
            err = gpio_request(N810_EMMC_VSD_GPIO, "MMC slot 2 Vddf");
            if (err) {
                  gpio_free(N8X0_SLOT_SWITCH_GPIO);
                  return;
            }
            gpio_direction_output(N810_EMMC_VSD_GPIO, 0);

            err = gpio_request(N810_EMMC_VIO_GPIO, "MMC slot 2 Vdd");
            if (err) {
                  gpio_free(N8X0_SLOT_SWITCH_GPIO);
                  gpio_free(N810_EMMC_VSD_GPIO);
                  return;
            }
            gpio_direction_output(N810_EMMC_VIO_GPIO, 0);
      }

      mmc_data[0] = &mmc1_data;
      omap2_init_mmc(mmc_data, OMAP24XX_NR_MMC);
}
#else

void __init n8x0_mmc_init(void)
{
}
#endif      /* CONFIG_MMC_OMAP */

#ifdef CONFIG_MENELAUS

static int n8x0_auto_sleep_regulators(void)
{
      u32 val;
      int ret;

      val = EN_VPLL_SLEEP | EN_VMMC_SLEEP    \
            | EN_VAUX_SLEEP | EN_VIO_SLEEP \
            | EN_VMEM_SLEEP | EN_DC3_SLEEP \
            | EN_VC_SLEEP | EN_DC2_SLEEP;

      ret = menelaus_set_regulator_sleep(1, val);
      if (ret < 0) {
            printk(KERN_ERR "Could not set regulators to sleep on "
                  "menelaus: %u\n", ret);
            return ret;
      }
      return 0;
}

static int n8x0_auto_voltage_scale(void)
{
      int ret;

      ret = menelaus_set_vcore_hw(1400, 1050);
      if (ret < 0) {
            printk(KERN_ERR "Could not set VCORE voltage on "
                  "menelaus: %u\n", ret);
            return ret;
      }
      return 0;
}

static int n8x0_menelaus_late_init(struct device *dev)
{
      int ret;

      ret = n8x0_auto_voltage_scale();
      if (ret < 0)
            return ret;
      ret = n8x0_auto_sleep_regulators();
      if (ret < 0)
            return ret;
      return 0;
}

#else
static int n8x0_menelaus_late_init(struct device *dev)
{
      return 0;
}
#endif

static struct menelaus_platform_data n8x0_menelaus_platform_data __initdata = {
      .late_init = n8x0_menelaus_late_init,
};

static struct i2c_board_info __initdata n8x0_i2c_board_info_1[] __initdata = {
      {
            I2C_BOARD_INFO("menelaus", 0x72),
            .irq = INT_24XX_SYS_NIRQ,
            .platform_data = &n8x0_menelaus_platform_data,
      },
};

static struct aic3x_pdata n810_aic33_data __initdata = {
      .gpio_reset = 118,
};

static struct i2c_board_info n810_i2c_board_info_2[] __initdata = {
      {
            I2C_BOARD_INFO("tlv320aic3x", 0x18),
            .platform_data = &n810_aic33_data,
      },
};

static void __init n8x0_map_io(void)
{
      omap2_set_globals_242x();
      omap242x_map_common_io();
}

static void __init n8x0_init_irq(void)
{
      omap2_init_common_infrastructure();
      omap2_init_common_devices(NULL, NULL);
      omap_init_irq();
}

#ifdef CONFIG_OMAP_MUX
static struct omap_board_mux board_mux[] __initdata = {
      /* I2S codec port pins for McBSP block */
      OMAP2420_MUX(EAC_AC_SCLK, OMAP_MUX_MODE1 | OMAP_PIN_INPUT),
      OMAP2420_MUX(EAC_AC_FS, OMAP_MUX_MODE1 | OMAP_PIN_INPUT),
      OMAP2420_MUX(EAC_AC_DIN, OMAP_MUX_MODE1 | OMAP_PIN_INPUT),
      OMAP2420_MUX(EAC_AC_DOUT, OMAP_MUX_MODE1 | OMAP_PIN_OUTPUT),
      { .reg_offset = OMAP_MUX_TERMINATOR },
};

static struct omap_device_pad serial2_pads[] __initdata = {
      {
            .name = "uart3_rx_irrx.uart3_rx_irrx",
            .flags      = OMAP_DEVICE_PAD_REMUX | OMAP_DEVICE_PAD_WAKEUP,
            .enable     = OMAP_MUX_MODE0,
            .idle = OMAP_MUX_MODE3  /* Mux as GPIO for idle */
      },
};

static inline void board_serial_init(void)
{
      struct omap_board_data bdata;

      bdata.flags = 0;
      bdata.pads = NULL;
      bdata.pads_cnt = 0;

      bdata.id = 0;
      omap_serial_init_port(&bdata);

      bdata.id = 1;
      omap_serial_init_port(&bdata);

      bdata.id = 2;
      bdata.pads = serial2_pads;
      bdata.pads_cnt = ARRAY_SIZE(serial2_pads);
      omap_serial_init_port(&bdata);
}

#else

static inline void board_serial_init(void)
{
      omap_serial_init();
}

#endif

static void __init n8x0_init_machine(void)
{
      omap2420_mux_init(board_mux, OMAP_PACKAGE_ZAC);
      /* FIXME: add n810 spi devices */
      spi_register_board_info(n800_spi_board_info,
                        ARRAY_SIZE(n800_spi_board_info));
      omap_register_i2c_bus(1, 400, n8x0_i2c_board_info_1,
                        ARRAY_SIZE(n8x0_i2c_board_info_1));
      omap_register_i2c_bus(2, 400, NULL, 0);
      if (machine_is_nokia_n810())
            i2c_register_board_info(2, n810_i2c_board_info_2,
                              ARRAY_SIZE(n810_i2c_board_info_2));
      board_serial_init();
      gpmc_onenand_init(board_onenand_data);
      n8x0_mmc_init();
      n8x0_usb_init();
}

MACHINE_START(NOKIA_N800, "Nokia N800")
      .boot_params      = 0x80000100,
      .map_io           = n8x0_map_io,
      .reserve    = omap_reserve,
      .init_irq   = n8x0_init_irq,
      .init_machine     = n8x0_init_machine,
      .timer            = &omap_timer,
MACHINE_END

MACHINE_START(NOKIA_N810, "Nokia N810")
      .boot_params      = 0x80000100,
      .map_io           = n8x0_map_io,
      .reserve    = omap_reserve,
      .init_irq   = n8x0_init_irq,
      .init_machine     = n8x0_init_machine,
      .timer            = &omap_timer,
MACHINE_END

MACHINE_START(NOKIA_N810_WIMAX, "Nokia N810 WiMAX")
      .boot_params      = 0x80000100,
      .map_io           = n8x0_map_io,
      .reserve    = omap_reserve,
      .init_irq   = n8x0_init_irq,
      .init_machine     = n8x0_init_machine,
      .timer            = &omap_timer,
MACHINE_END

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