mx31moboard-devboard.c

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/*
 * Copyright (C) 2009 Valentin Longchamp, EPFL Mobots group
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 */

#include <linux/gpio.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/delay.h>
#include <linux/platform_device.h>
#include <linux/slab.h>
#include <linux/types.h>

#include <linux/usb/otg.h>

#include <mach/common.h>
#include <mach/iomux-mx3.h>
#include <mach/hardware.h>
#include <mach/ulpi.h>

#include "devices-imx31.h"

static unsigned int devboard_pins[] = {
    /* UART1 */
    MX31_PIN_CTS2__CTS2, MX31_PIN_RTS2__RTS2,
    MX31_PIN_TXD2__TXD2, MX31_PIN_RXD2__RXD2,
    /* SDHC2 */
    MX31_PIN_PC_PWRON__SD2_DATA3, MX31_PIN_PC_VS1__SD2_DATA2,
    MX31_PIN_PC_READY__SD2_DATA1, MX31_PIN_PC_WAIT_B__SD2_DATA0,
    MX31_PIN_PC_CD2_B__SD2_CLK, MX31_PIN_PC_CD1_B__SD2_CMD,
    MX31_PIN_ATA_DIOR__GPIO3_28, MX31_PIN_ATA_DIOW__GPIO3_29,
    /* USB H1 */
    MX31_PIN_CSPI1_MISO__USBH1_RXDP, MX31_PIN_CSPI1_MOSI__USBH1_RXDM,
    MX31_PIN_CSPI1_SS0__USBH1_TXDM, MX31_PIN_CSPI1_SS1__USBH1_TXDP,
    MX31_PIN_CSPI1_SS2__USBH1_RCV, MX31_PIN_CSPI1_SCLK__USBH1_OEB,
    MX31_PIN_CSPI1_SPI_RDY__USBH1_FS, MX31_PIN_SFS6__USBH1_SUSPEND,
    MX31_PIN_NFRE_B__GPIO1_11, MX31_PIN_NFALE__GPIO1_12,
    /* SEL */
    MX31_PIN_DTR_DCE1__GPIO2_8, MX31_PIN_DSR_DCE1__GPIO2_9,
    MX31_PIN_RI_DCE1__GPIO2_10, MX31_PIN_DCD_DCE1__GPIO2_11,
};

static const struct imxuart_platform_data uart_pdata __initconst = {
    .flags = IMXUART_HAVE_RTSCTS,
};

#define SDHC2_CD IOMUX_TO_GPIO(MX31_PIN_ATA_DIOR)
#define SDHC2_WP IOMUX_TO_GPIO(MX31_PIN_ATA_DIOW)

static int devboard_sdhc2_get_ro(struct device *dev)
{
    return !gpio_get_value(SDHC2_WP);
}

static int devboard_sdhc2_init(struct device *dev, irq_handler_t detect_irq,
        void *data)
{
    int ret;

    ret = gpio_request(SDHC2_CD, "sdhc-detect");
    if (ret)
        return ret;

    gpio_direction_input(SDHC2_CD);

    ret = gpio_request(SDHC2_WP, "sdhc-wp");
    if (ret)
        goto err_gpio_free;
    gpio_direction_input(SDHC2_WP);

    ret = request_irq(gpio_to_irq(SDHC2_CD), detect_irq,
        IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING,
        "sdhc2-card-detect", data);
    if (ret)
        goto err_gpio_free_2;

    return 0;

err_gpio_free_2:
    gpio_free(SDHC2_WP);
err_gpio_free:
    gpio_free(SDHC2_CD);

    return ret;
}

static void devboard_sdhc2_exit(struct device *dev, void *data)
{
    free_irq(gpio_to_irq(SDHC2_CD), data);
    gpio_free(SDHC2_WP);
    gpio_free(SDHC2_CD);
}

static const struct imxmmc_platform_data sdhc2_pdata __initconst = {
    .get_ro = devboard_sdhc2_get_ro,
    .init   = devboard_sdhc2_init,
    .exit   = devboard_sdhc2_exit,
};

#define SEL0 IOMUX_TO_GPIO(MX31_PIN_DTR_DCE1)
#define SEL1 IOMUX_TO_GPIO(MX31_PIN_DSR_DCE1)
#define SEL2 IOMUX_TO_GPIO(MX31_PIN_RI_DCE1)
#define SEL3 IOMUX_TO_GPIO(MX31_PIN_DCD_DCE1)

static void devboard_init_sel_gpios(void)
{
    if (!gpio_request(SEL0, "sel0")) {
        gpio_direction_input(SEL0);
        gpio_export(SEL0, true);
    }

    if (!gpio_request(SEL1, "sel1")) {
        gpio_direction_input(SEL1);
        gpio_export(SEL1, true);
    }

    if (!gpio_request(SEL2, "sel2")) {
        gpio_direction_input(SEL2);
        gpio_export(SEL2, true);
    }

    if (!gpio_request(SEL3, "sel3")) {
        gpio_direction_input(SEL3);
        gpio_export(SEL3, true);
    }
}
#define USB_PAD_CFG (PAD_CTL_DRV_MAX | PAD_CTL_SRE_FAST | PAD_CTL_HYS_CMOS | \
            PAD_CTL_ODE_CMOS | PAD_CTL_100K_PU)

static int devboard_usbh1_hw_init(struct platform_device *pdev)
{
    mxc_iomux_set_gpr(MUX_PGP_USB_SUSPEND, true);

    mxc_iomux_set_pad(MX31_PIN_CSPI1_MISO, USB_PAD_CFG);
    mxc_iomux_set_pad(MX31_PIN_CSPI1_MOSI, USB_PAD_CFG);
    mxc_iomux_set_pad(MX31_PIN_CSPI1_SS0, USB_PAD_CFG);
    mxc_iomux_set_pad(MX31_PIN_CSPI1_SS1, USB_PAD_CFG);
    mxc_iomux_set_pad(MX31_PIN_CSPI1_SS2, USB_PAD_CFG);
    mxc_iomux_set_pad(MX31_PIN_CSPI1_SCLK, USB_PAD_CFG);
    mxc_iomux_set_pad(MX31_PIN_CSPI1_SPI_RDY, USB_PAD_CFG);
    mxc_iomux_set_pad(MX31_PIN_SFS6, USB_PAD_CFG);

    mdelay(10);

    return mx31_initialize_usb_hw(pdev->id, MXC_EHCI_POWER_PINS_ENABLED |
            MXC_EHCI_INTERFACE_SINGLE_UNI);
}

#define USBH1_VBUSEN_B  IOMUX_TO_GPIO(MX31_PIN_NFRE_B)
#define USBH1_MODE  IOMUX_TO_GPIO(MX31_PIN_NFALE)

static int devboard_isp1105_init(struct usb_phy *otg)
{
    int ret = gpio_request(USBH1_MODE, "usbh1-mode");
    if (ret)
        return ret;
    /* single ended */
    gpio_direction_output(USBH1_MODE, 0);

    ret = gpio_request(USBH1_VBUSEN_B, "usbh1-vbusen");
    if (ret) {
        gpio_free(USBH1_MODE);
        return ret;
    }
    gpio_direction_output(USBH1_VBUSEN_B, 1);

    return 0;
}


static int devboard_isp1105_set_vbus(struct usb_otg *otg, bool on)
{
    if (on)
        gpio_set_value(USBH1_VBUSEN_B, 0);
    else
        gpio_set_value(USBH1_VBUSEN_B, 1);

    return 0;
}

static struct mxc_usbh_platform_data usbh1_pdata __initdata = {
    .init   = devboard_usbh1_hw_init,
    .portsc = MXC_EHCI_MODE_UTMI | MXC_EHCI_SERIAL,
};

static int __init devboard_usbh1_init(void)
{
    struct usb_phy *phy;
    struct platform_device *pdev;

    phy = kzalloc(sizeof(*phy), GFP_KERNEL);
    if (!phy)
        return -ENOMEM;

    phy->otg = kzalloc(sizeof(struct usb_otg), GFP_KERNEL);
    if (!phy->otg) {
        kfree(phy);
        return -ENOMEM;
    }

    phy->label  = "ISP1105";
    phy->init   = devboard_isp1105_init;
    phy->otg->set_vbus  = devboard_isp1105_set_vbus;

    usbh1_pdata.otg = phy;

    pdev = imx31_add_mxc_ehci_hs(1, &usbh1_pdata);
    if (IS_ERR(pdev))
        return PTR_ERR(pdev);

    return 0;
}


static const struct fsl_usb2_platform_data usb_pdata __initconst = {
    .operating_mode = FSL_USB2_DR_DEVICE,
    .phy_mode   = FSL_USB2_PHY_ULPI,
};

/*
 * system init for baseboard usage. Will be called by mx31moboard init.
 */
void __init mx31moboard_devboard_init(void)
{
    printk(KERN_INFO "Initializing mx31devboard peripherals\n");

    mxc_iomux_setup_multiple_pins(devboard_pins, ARRAY_SIZE(devboard_pins),
        "devboard");

    imx31_add_imx_uart1(&uart_pdata);

    imx31_add_mxc_mmc(1, &sdhc2_pdata);

    devboard_init_sel_gpios();

    imx31_add_fsl_usb2_udc(&usb_pdata);

    devboard_usbh1_init();
}