balloon3.c

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/*
 *  linux/arch/arm/mach-pxa/balloon3.c
 *
 *  Support for Balloonboard.org Balloon3 board.
 *
 *  Author: Nick Bane, Wookey, Jonathan McDowell
 *  Created:    June, 2006
 *  Copyright:  Toby Churchill Ltd
 *  Derived from mainstone.c, by Nico Pitre
 *
 *  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/export.h>
#include <linux/init.h>
#include <linux/platform_device.h>
#include <linux/interrupt.h>
#include <linux/sched.h>
#include <linux/bitops.h>
#include <linux/fb.h>
#include <linux/gpio.h>
#include <linux/ioport.h>
#include <linux/ucb1400.h>
#include <linux/mtd/mtd.h>
#include <linux/mtd/partitions.h>
#include <linux/types.h>
#include <linux/i2c/pcf857x.h>
#include <linux/i2c/pxa-i2c.h>
#include <linux/mtd/nand.h>
#include <linux/mtd/physmap.h>
#include <linux/regulator/max1586.h>

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

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

#include <mach/pxa27x.h>
#include <mach/balloon3.h>
#include <mach/audio.h>
#include <linux/platform_data/video-pxafb.h>
#include <linux/platform_data/mmc-pxamci.h>
#include <mach/udc.h>
#include <mach/pxa27x-udc.h>
#include <linux/platform_data/irda-pxaficp.h>
#include <linux/platform_data/usb-ohci-pxa27x.h>

#include "generic.h"
#include "devices.h"

/******************************************************************************
 * Pin configuration
 ******************************************************************************/
static unsigned long balloon3_pin_config[] __initdata = {
    /* Select BTUART 'COM1/ttyS0' as IO option for pins 42/43/44/45 */
    GPIO42_BTUART_RXD,
    GPIO43_BTUART_TXD,
    GPIO44_BTUART_CTS,
    GPIO45_BTUART_RTS,

    /* Reset, configured as GPIO wakeup source */
    GPIO1_GPIO | WAKEUP_ON_EDGE_BOTH,
};

/******************************************************************************
 * Compatibility: Parameter parsing
 ******************************************************************************/
static unsigned long balloon3_irq_enabled;

static unsigned long balloon3_features_present =
        (1 << BALLOON3_FEATURE_OHCI) | (1 << BALLOON3_FEATURE_CF) |
        (1 << BALLOON3_FEATURE_AUDIO) |
        (1 << BALLOON3_FEATURE_TOPPOLY);

int balloon3_has(enum balloon3_features feature)
{
    return (balloon3_features_present & (1 << feature)) ? 1 : 0;
}
EXPORT_SYMBOL_GPL(balloon3_has);

int __init parse_balloon3_features(char *arg)
{
    if (!arg)
        return 0;

    return strict_strtoul(arg, 0, &balloon3_features_present);
}
early_param("balloon3_features", parse_balloon3_features);

/******************************************************************************
 * Compact Flash slot
 ******************************************************************************/
#if defined(CONFIG_PCMCIA_PXA2XX) || defined(CONFIG_PCMCIA_PXA2XX_MODULE)
static unsigned long balloon3_cf_pin_config[] __initdata = {
    GPIO48_nPOE,
    GPIO49_nPWE,
    GPIO50_nPIOR,
    GPIO51_nPIOW,
    GPIO85_nPCE_1,
    GPIO54_nPCE_2,
    GPIO79_PSKTSEL,
    GPIO55_nPREG,
    GPIO56_nPWAIT,
    GPIO57_nIOIS16,
};

static void __init balloon3_cf_init(void)
{
    if (!balloon3_has(BALLOON3_FEATURE_CF))
        return;

    pxa2xx_mfp_config(ARRAY_AND_SIZE(balloon3_cf_pin_config));
}
#else
static inline void balloon3_cf_init(void) {}
#endif

/******************************************************************************
 * NOR Flash
 ******************************************************************************/
#if defined(CONFIG_MTD_PHYSMAP) || defined(CONFIG_MTD_PHYSMAP_MODULE)
static struct mtd_partition balloon3_nor_partitions[] = {
    {
        .name       = "Flash",
        .offset     = 0x00000000,
        .size       = MTDPART_SIZ_FULL,
    }
};

static struct physmap_flash_data balloon3_flash_data[] = {
    {
        .width      = 2,    /* bankwidth in bytes */
        .parts      = balloon3_nor_partitions,
        .nr_parts   = ARRAY_SIZE(balloon3_nor_partitions)
    }
};

static struct resource balloon3_flash_resource = {
    .start  = PXA_CS0_PHYS,
    .end    = PXA_CS0_PHYS + SZ_64M - 1,
    .flags  = IORESOURCE_MEM,
};

static struct platform_device balloon3_flash = {
    .name       = "physmap-flash",
    .id     = 0,
    .resource   = &balloon3_flash_resource,
    .num_resources  = 1,
    .dev        = {
        .platform_data = balloon3_flash_data,
    },
};
static void __init balloon3_nor_init(void)
{
    platform_device_register(&balloon3_flash);
}
#else
static inline void balloon3_nor_init(void) {}
#endif

/******************************************************************************
 * Audio and Touchscreen
 ******************************************************************************/
#if defined(CONFIG_TOUCHSCREEN_UCB1400) || \
    defined(CONFIG_TOUCHSCREEN_UCB1400_MODULE)
static unsigned long balloon3_ac97_pin_config[] __initdata = {
    GPIO28_AC97_BITCLK,
    GPIO29_AC97_SDATA_IN_0,
    GPIO30_AC97_SDATA_OUT,
    GPIO31_AC97_SYNC,
    GPIO113_AC97_nRESET,
    GPIO95_GPIO,
};

static struct ucb1400_pdata vpac270_ucb1400_pdata = {
    .irq        = PXA_GPIO_TO_IRQ(BALLOON3_GPIO_CODEC_IRQ),
};


static struct platform_device balloon3_ucb1400_device = {
    .name       = "ucb1400_core",
    .id     = -1,
    .dev        = {
        .platform_data = &vpac270_ucb1400_pdata,
    },
};

static void __init balloon3_ts_init(void)
{
    if (!balloon3_has(BALLOON3_FEATURE_AUDIO))
        return;

    pxa2xx_mfp_config(ARRAY_AND_SIZE(balloon3_ac97_pin_config));
    pxa_set_ac97_info(NULL);
    platform_device_register(&balloon3_ucb1400_device);
}
#else
static inline void balloon3_ts_init(void) {}
#endif

/******************************************************************************
 * Framebuffer
 ******************************************************************************/
#if defined(CONFIG_FB_PXA) || defined(CONFIG_FB_PXA_MODULE)
static unsigned long balloon3_lcd_pin_config[] __initdata = {
    GPIOxx_LCD_TFT_16BPP,
    GPIO99_GPIO,
};

static struct pxafb_mode_info balloon3_lcd_modes[] = {
    {
        .pixclock       = 38000,
        .xres           = 480,
        .yres           = 640,
        .bpp            = 16,
        .hsync_len      = 8,
        .left_margin        = 8,
        .right_margin       = 8,
        .vsync_len      = 2,
        .upper_margin       = 4,
        .lower_margin       = 5,
        .sync           = 0,
    },
};

static struct pxafb_mach_info balloon3_lcd_screen = {
    .modes          = balloon3_lcd_modes,
    .num_modes      = ARRAY_SIZE(balloon3_lcd_modes),
    .lcd_conn       = LCD_COLOR_TFT_16BPP | LCD_PCLK_EDGE_FALL,
};

static void balloon3_backlight_power(int on)
{
    gpio_set_value(BALLOON3_GPIO_RUN_BACKLIGHT, on);
}

static void __init balloon3_lcd_init(void)
{
    int ret;

    if (!balloon3_has(BALLOON3_FEATURE_TOPPOLY))
        return;

    pxa2xx_mfp_config(ARRAY_AND_SIZE(balloon3_lcd_pin_config));

    ret = gpio_request(BALLOON3_GPIO_RUN_BACKLIGHT, "BKL-ON");
    if (ret) {
        pr_err("Requesting BKL-ON GPIO failed!\n");
        goto err;
    }

    ret = gpio_direction_output(BALLOON3_GPIO_RUN_BACKLIGHT, 1);
    if (ret) {
        pr_err("Setting BKL-ON GPIO direction failed!\n");
        goto err2;
    }

    balloon3_lcd_screen.pxafb_backlight_power = balloon3_backlight_power;
    pxa_set_fb_info(NULL, &balloon3_lcd_screen);
    return;

err2:
    gpio_free(BALLOON3_GPIO_RUN_BACKLIGHT);
err:
    return;
}
#else
static inline void balloon3_lcd_init(void) {}
#endif

/******************************************************************************
 * SD/MMC card controller
 ******************************************************************************/
#if defined(CONFIG_MMC_PXA) || defined(CONFIG_MMC_PXA_MODULE)
static unsigned long balloon3_mmc_pin_config[] __initdata = {
    GPIO32_MMC_CLK,
    GPIO92_MMC_DAT_0,
    GPIO109_MMC_DAT_1,
    GPIO110_MMC_DAT_2,
    GPIO111_MMC_DAT_3,
    GPIO112_MMC_CMD,
};

static struct pxamci_platform_data balloon3_mci_platform_data = {
    .ocr_mask       = MMC_VDD_32_33 | MMC_VDD_33_34,
    .gpio_card_detect   = -1,
    .gpio_card_ro       = -1,
    .gpio_power     = -1,
    .detect_delay_ms    = 200,
};

static void __init balloon3_mmc_init(void)
{
    pxa2xx_mfp_config(ARRAY_AND_SIZE(balloon3_mmc_pin_config));
    pxa_set_mci_info(&balloon3_mci_platform_data);
}
#else
static inline void balloon3_mmc_init(void) {}
#endif

/******************************************************************************
 * USB Gadget
 ******************************************************************************/
#if defined(CONFIG_USB_PXA27X)||defined(CONFIG_USB_PXA27X_MODULE)
static void balloon3_udc_command(int cmd)
{
    if (cmd == PXA2XX_UDC_CMD_CONNECT)
        UP2OCR |= UP2OCR_DPPUE | UP2OCR_DPPUBE;
    else if (cmd == PXA2XX_UDC_CMD_DISCONNECT)
        UP2OCR &= ~UP2OCR_DPPUE;
}

static int balloon3_udc_is_connected(void)
{
    return 1;
}

static struct pxa2xx_udc_mach_info balloon3_udc_info __initdata = {
    .udc_command        = balloon3_udc_command,
    .udc_is_connected   = balloon3_udc_is_connected,
    .gpio_pullup        = -1,
};

static void __init balloon3_udc_init(void)
{
    pxa_set_udc_info(&balloon3_udc_info);
    platform_device_register(&balloon3_gpio_vbus);
}
#else
static inline void balloon3_udc_init(void) {}
#endif

/******************************************************************************
 * IrDA
 ******************************************************************************/
#if defined(CONFIG_IRDA) || defined(CONFIG_IRDA_MODULE)
static struct pxaficp_platform_data balloon3_ficp_platform_data = {
    .transceiver_cap    = IR_FIRMODE | IR_SIRMODE | IR_OFF,
};

static void __init balloon3_irda_init(void)
{
    pxa_set_ficp_info(&balloon3_ficp_platform_data);
}
#else
static inline void balloon3_irda_init(void) {}
#endif

/******************************************************************************
 * USB Host
 ******************************************************************************/
#if defined(CONFIG_USB_OHCI_HCD) || defined(CONFIG_USB_OHCI_HCD_MODULE)
static unsigned long balloon3_uhc_pin_config[] __initdata = {
    GPIO88_USBH1_PWR,
    GPIO89_USBH1_PEN,
};

static struct pxaohci_platform_data balloon3_ohci_info = {
    .port_mode  = PMM_PERPORT_MODE,
    .flags      = ENABLE_PORT_ALL | POWER_CONTROL_LOW | POWER_SENSE_LOW,
};

static void __init balloon3_uhc_init(void)
{
    if (!balloon3_has(BALLOON3_FEATURE_OHCI))
        return;
    pxa2xx_mfp_config(ARRAY_AND_SIZE(balloon3_uhc_pin_config));
    pxa_set_ohci_info(&balloon3_ohci_info);
}
#else
static inline void balloon3_uhc_init(void) {}
#endif

/******************************************************************************
 * LEDs
 ******************************************************************************/
#if defined(CONFIG_LEDS_GPIO) || defined(CONFIG_LEDS_GPIO_MODULE)
static unsigned long balloon3_led_pin_config[] __initdata = {
    GPIO9_GPIO, /* NAND activity LED */
    GPIO10_GPIO,    /* Heartbeat LED */
};

struct gpio_led balloon3_gpio_leds[] = {
    {
        .name           = "balloon3:green:idle",
        .default_trigger    = "heartbeat",
        .gpio           = BALLOON3_GPIO_LED_IDLE,
        .active_low     = 1,
    }, {
        .name           = "balloon3:green:nand",
        .default_trigger    = "nand-disk",
        .gpio           = BALLOON3_GPIO_LED_NAND,
        .active_low     = 1,
    },
};

static struct gpio_led_platform_data balloon3_gpio_led_info = {
    .leds       = balloon3_gpio_leds,
    .num_leds   = ARRAY_SIZE(balloon3_gpio_leds),
};

static struct platform_device balloon3_leds = {
    .name   = "leds-gpio",
    .id = 0,
    .dev    = {
        .platform_data  = &balloon3_gpio_led_info,
    }
};

struct gpio_led balloon3_pcf_gpio_leds[] = {
    {
        .name           = "balloon3:green:led0",
        .gpio           = BALLOON3_PCF_GPIO_LED0,
        .active_low     = 1,
    }, {
        .name           = "balloon3:green:led1",
        .gpio           = BALLOON3_PCF_GPIO_LED1,
        .active_low     = 1,
    }, {
        .name           = "balloon3:orange:led2",
        .gpio           = BALLOON3_PCF_GPIO_LED2,
        .active_low     = 1,
    }, {
        .name           = "balloon3:orange:led3",
        .gpio           = BALLOON3_PCF_GPIO_LED3,
        .active_low     = 1,
    }, {
        .name           = "balloon3:orange:led4",
        .gpio           = BALLOON3_PCF_GPIO_LED4,
        .active_low     = 1,
    }, {
        .name           = "balloon3:orange:led5",
        .gpio           = BALLOON3_PCF_GPIO_LED5,
        .active_low     = 1,
    }, {
        .name           = "balloon3:red:led6",
        .gpio           = BALLOON3_PCF_GPIO_LED6,
        .active_low     = 1,
    }, {
        .name           = "balloon3:red:led7",
        .gpio           = BALLOON3_PCF_GPIO_LED7,
        .active_low     = 1,
    },
};

static struct gpio_led_platform_data balloon3_pcf_gpio_led_info = {
    .leds       = balloon3_pcf_gpio_leds,
    .num_leds   = ARRAY_SIZE(balloon3_pcf_gpio_leds),
};

static struct platform_device balloon3_pcf_leds = {
    .name   = "leds-gpio",
    .id = 1,
    .dev    = {
        .platform_data  = &balloon3_pcf_gpio_led_info,
    }
};

static void __init balloon3_leds_init(void)
{
    pxa2xx_mfp_config(ARRAY_AND_SIZE(balloon3_led_pin_config));
    platform_device_register(&balloon3_leds);
    platform_device_register(&balloon3_pcf_leds);
}
#else
static inline void balloon3_leds_init(void) {}
#endif

/******************************************************************************
 * FPGA IRQ
 ******************************************************************************/
static void balloon3_mask_irq(struct irq_data *d)
{
    int balloon3_irq = (d->irq - BALLOON3_IRQ(0));
    balloon3_irq_enabled &= ~(1 << balloon3_irq);
    __raw_writel(~balloon3_irq_enabled, BALLOON3_INT_CONTROL_REG);
}

static void balloon3_unmask_irq(struct irq_data *d)
{
    int balloon3_irq = (d->irq - BALLOON3_IRQ(0));
    balloon3_irq_enabled |= (1 << balloon3_irq);
    __raw_writel(~balloon3_irq_enabled, BALLOON3_INT_CONTROL_REG);
}

static struct irq_chip balloon3_irq_chip = {
    .name       = "FPGA",
    .irq_ack    = balloon3_mask_irq,
    .irq_mask   = balloon3_mask_irq,
    .irq_unmask = balloon3_unmask_irq,
};

static void balloon3_irq_handler(unsigned int irq, struct irq_desc *desc)
{
    unsigned long pending = __raw_readl(BALLOON3_INT_CONTROL_REG) &
                    balloon3_irq_enabled;
    do {
        /* clear useless edge notification */
        if (desc->irq_data.chip->irq_ack) {
            struct irq_data *d;

            d = irq_get_irq_data(BALLOON3_AUX_NIRQ);
            desc->irq_data.chip->irq_ack(d);
        }

        while (pending) {
            irq = BALLOON3_IRQ(0) + __ffs(pending);
            generic_handle_irq(irq);
            pending &= pending - 1;
        }
        pending = __raw_readl(BALLOON3_INT_CONTROL_REG) &
                balloon3_irq_enabled;
    } while (pending);
}

static void __init balloon3_init_irq(void)
{
    int irq;

    pxa27x_init_irq();
    /* setup extra Balloon3 irqs */
    for (irq = BALLOON3_IRQ(0); irq <= BALLOON3_IRQ(7); irq++) {
        irq_set_chip_and_handler(irq, &balloon3_irq_chip,
                     handle_level_irq);
        set_irq_flags(irq, IRQF_VALID | IRQF_PROBE);
    }

    irq_set_chained_handler(BALLOON3_AUX_NIRQ, balloon3_irq_handler);
    irq_set_irq_type(BALLOON3_AUX_NIRQ, IRQ_TYPE_EDGE_FALLING);

    pr_debug("%s: chained handler installed - irq %d automatically "
        "enabled\n", __func__, BALLOON3_AUX_NIRQ);
}

/******************************************************************************
 * GPIO expander
 ******************************************************************************/
#if defined(CONFIG_GPIO_PCF857X) || defined(CONFIG_GPIO_PCF857X_MODULE)
static struct pcf857x_platform_data balloon3_pcf857x_pdata = {
    .gpio_base  = BALLOON3_PCF_GPIO_BASE,
    .n_latch    = 0,
    .setup      = NULL,
    .teardown   = NULL,
    .context    = NULL,
};

static struct i2c_board_info __initdata balloon3_i2c_devs[] = {
    {
        I2C_BOARD_INFO("pcf8574a", 0x38),
        .platform_data  = &balloon3_pcf857x_pdata,
    },
};

static void __init balloon3_i2c_init(void)
{
    pxa_set_i2c_info(NULL);
    i2c_register_board_info(0, ARRAY_AND_SIZE(balloon3_i2c_devs));
}
#else
static inline void balloon3_i2c_init(void) {}
#endif

/******************************************************************************
 * NAND
 ******************************************************************************/
#if defined(CONFIG_MTD_NAND_PLATFORM)||defined(CONFIG_MTD_NAND_PLATFORM_MODULE)
static void balloon3_nand_cmd_ctl(struct mtd_info *mtd, int cmd, unsigned int ctrl)
{
    struct nand_chip *this = mtd->priv;
    uint8_t balloon3_ctl_set = 0, balloon3_ctl_clr = 0;

    if (ctrl & NAND_CTRL_CHANGE) {
        if (ctrl & NAND_CLE)
            balloon3_ctl_set |= BALLOON3_NAND_CONTROL_FLCLE;
        else
            balloon3_ctl_clr |= BALLOON3_NAND_CONTROL_FLCLE;

        if (ctrl & NAND_ALE)
            balloon3_ctl_set |= BALLOON3_NAND_CONTROL_FLALE;
        else
            balloon3_ctl_clr |= BALLOON3_NAND_CONTROL_FLALE;

        if (balloon3_ctl_clr)
            __raw_writel(balloon3_ctl_clr,
                BALLOON3_NAND_CONTROL_REG);
        if (balloon3_ctl_set)
            __raw_writel(balloon3_ctl_set,
                BALLOON3_NAND_CONTROL_REG +
                BALLOON3_FPGA_SETnCLR);
    }

    if (cmd != NAND_CMD_NONE)
        writeb(cmd, this->IO_ADDR_W);
}

static void balloon3_nand_select_chip(struct mtd_info *mtd, int chip)
{
    if (chip < 0 || chip > 3)
        return;

    /* Assert all nCE lines */
    __raw_writew(
        BALLOON3_NAND_CONTROL_FLCE0 | BALLOON3_NAND_CONTROL_FLCE1 |
        BALLOON3_NAND_CONTROL_FLCE2 | BALLOON3_NAND_CONTROL_FLCE3,
        BALLOON3_NAND_CONTROL_REG + BALLOON3_FPGA_SETnCLR);

    /* Deassert correct nCE line */
    __raw_writew(BALLOON3_NAND_CONTROL_FLCE0 << chip,
        BALLOON3_NAND_CONTROL_REG);
}

static int balloon3_nand_dev_ready(struct mtd_info *mtd)
{
    return __raw_readl(BALLOON3_NAND_STAT_REG) & BALLOON3_NAND_STAT_RNB;
}

static int balloon3_nand_probe(struct platform_device *pdev)
{
    uint16_t ver;
    int ret;

    __raw_writew(BALLOON3_NAND_CONTROL2_16BIT,
        BALLOON3_NAND_CONTROL2_REG + BALLOON3_FPGA_SETnCLR);

    ver = __raw_readw(BALLOON3_FPGA_VER);
    if (ver < 0x4f08)
        pr_warn("The FPGA code, version 0x%04x, is too old. "
            "NAND support might be broken in this version!", ver);

    /* Power up the NAND chips */
    ret = gpio_request(BALLOON3_GPIO_RUN_NAND, "NAND");
    if (ret)
        goto err1;

    ret = gpio_direction_output(BALLOON3_GPIO_RUN_NAND, 1);
    if (ret)
        goto err2;

    gpio_set_value(BALLOON3_GPIO_RUN_NAND, 1);

    /* Deassert all nCE lines and write protect line */
    __raw_writel(
        BALLOON3_NAND_CONTROL_FLCE0 | BALLOON3_NAND_CONTROL_FLCE1 |
        BALLOON3_NAND_CONTROL_FLCE2 | BALLOON3_NAND_CONTROL_FLCE3 |
        BALLOON3_NAND_CONTROL_FLWP,
        BALLOON3_NAND_CONTROL_REG + BALLOON3_FPGA_SETnCLR);
    return 0;

err2:
    gpio_free(BALLOON3_GPIO_RUN_NAND);
err1:
    return ret;
}

static void balloon3_nand_remove(struct platform_device *pdev)
{
    /* Power down the NAND chips */
    gpio_set_value(BALLOON3_GPIO_RUN_NAND, 0);
    gpio_free(BALLOON3_GPIO_RUN_NAND);
}

static struct mtd_partition balloon3_partition_info[] = {
    [0] = {
        .name   = "Boot",
        .offset = 0,
        .size   = SZ_4M,
    },
    [1] = {
        .name   = "RootFS",
        .offset = MTDPART_OFS_APPEND,
        .size   = MTDPART_SIZ_FULL
    },
};

struct platform_nand_data balloon3_nand_pdata = {
    .chip = {
        .nr_chips   = 4,
        .chip_offset    = 0,
        .nr_partitions  = ARRAY_SIZE(balloon3_partition_info),
        .partitions = balloon3_partition_info,
        .chip_delay = 50,
    },
    .ctrl = {
        .hwcontrol  = 0,
        .dev_ready  = balloon3_nand_dev_ready,
        .select_chip    = balloon3_nand_select_chip,
        .cmd_ctrl   = balloon3_nand_cmd_ctl,
        .probe      = balloon3_nand_probe,
        .remove     = balloon3_nand_remove,
    },
};

static struct resource balloon3_nand_resource[] = {
    [0] = {
        .start = BALLOON3_NAND_BASE,
        .end   = BALLOON3_NAND_BASE + 0x4,
        .flags = IORESOURCE_MEM,
    },
};

static struct platform_device balloon3_nand = {
    .name       = "gen_nand",
    .num_resources  = ARRAY_SIZE(balloon3_nand_resource),
    .resource   = balloon3_nand_resource,
    .id     = -1,
    .dev        = {
        .platform_data = &balloon3_nand_pdata,
    }
};

static void __init balloon3_nand_init(void)
{
    platform_device_register(&balloon3_nand);
}
#else
static inline void balloon3_nand_init(void) {}
#endif

/******************************************************************************
 * Core power regulator
 ******************************************************************************/
#if defined(CONFIG_REGULATOR_MAX1586) || \
    defined(CONFIG_REGULATOR_MAX1586_MODULE)
static struct regulator_consumer_supply balloon3_max1587a_consumers[] = {
    REGULATOR_SUPPLY("vcc_core", NULL),
};

static struct regulator_init_data balloon3_max1587a_v3_info = {
    .constraints = {
        .name       = "vcc_core range",
        .min_uV     = 900000,
        .max_uV     = 1705000,
        .always_on  = 1,
        .valid_ops_mask = REGULATOR_CHANGE_VOLTAGE,
    },
    .consumer_supplies  = balloon3_max1587a_consumers,
    .num_consumer_supplies  = ARRAY_SIZE(balloon3_max1587a_consumers),
};

static struct max1586_subdev_data balloon3_max1587a_subdevs[] = {
    {
        .name       = "vcc_core",
        .id     = MAX1586_V3,
        .platform_data  = &balloon3_max1587a_v3_info,
    }
};

static struct max1586_platform_data balloon3_max1587a_info = {
    .subdevs     = balloon3_max1587a_subdevs,
    .num_subdevs = ARRAY_SIZE(balloon3_max1587a_subdevs),
    .v3_gain     = MAX1586_GAIN_R24_3k32, /* 730..1550 mV */
};

static struct i2c_board_info __initdata balloon3_pi2c_board_info[] = {
    {
        I2C_BOARD_INFO("max1586", 0x14),
        .platform_data  = &balloon3_max1587a_info,
    },
};

static void __init balloon3_pmic_init(void)
{
    pxa27x_set_i2c_power_info(NULL);
    i2c_register_board_info(1, ARRAY_AND_SIZE(balloon3_pi2c_board_info));
}
#else
static inline void balloon3_pmic_init(void) {}
#endif

/******************************************************************************
 * Machine init
 ******************************************************************************/
static void __init balloon3_init(void)
{
    ARB_CNTRL = ARB_CORE_PARK | 0x234;

    pxa2xx_mfp_config(ARRAY_AND_SIZE(balloon3_pin_config));

    pxa_set_ffuart_info(NULL);
    pxa_set_btuart_info(NULL);
    pxa_set_stuart_info(NULL);

    balloon3_i2c_init();
    balloon3_irda_init();
    balloon3_lcd_init();
    balloon3_leds_init();
    balloon3_mmc_init();
    balloon3_nand_init();
    balloon3_nor_init();
    balloon3_pmic_init();
    balloon3_ts_init();
    balloon3_udc_init();
    balloon3_uhc_init();
    balloon3_cf_init();
}

static struct map_desc balloon3_io_desc[] __initdata = {
    {   /* CPLD/FPGA */
        .virtual    = (unsigned long)BALLOON3_FPGA_VIRT,
        .pfn        = __phys_to_pfn(BALLOON3_FPGA_PHYS),
        .length     = BALLOON3_FPGA_LENGTH,
        .type       = MT_DEVICE,
    },
};

static void __init balloon3_map_io(void)
{
    pxa27x_map_io();
    iotable_init(balloon3_io_desc, ARRAY_SIZE(balloon3_io_desc));
}

MACHINE_START(BALLOON3, "Balloon3")
    /* Maintainer: Nick Bane. */
    .map_io     = balloon3_map_io,
    .nr_irqs    = BALLOON3_NR_IRQS,
    .init_irq   = balloon3_init_irq,
    .handle_irq = pxa27x_handle_irq,
    .timer      = &pxa_timer,
    .init_machine   = balloon3_init,
    .atag_offset    = 0x100,
    .restart    = pxa_restart,
MACHINE_END