Logo Search packages:      
Sourcecode: linux version File versions  Download package

mx31moboard-devboard.c

/*
 * 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/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"
#include "devices.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);

      return 0;
}

#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 otg_transceiver *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 otg_transceiver *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,
      .flags      = MXC_EHCI_POWER_PINS_ENABLED | MXC_EHCI_INTERFACE_SINGLE_UNI,
};

static int __init devboard_usbh1_init(void)
{
      struct otg_transceiver *otg;
      struct platform_device *pdev;

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

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

      usbh1_pdata.otg = otg;

      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();
}

Generated by  Doxygen 1.6.0   Back to index