115 lines
3.0 KiB
C
115 lines
3.0 KiB
C
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/*
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* Copyright (C) 2009 Valentin Longchamp, EPFL Mobots group
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include <linux/gpio.h>
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#include <linux/init.h>
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#include <linux/interrupt.h>
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#include <linux/platform_device.h>
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#include <linux/types.h>
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#include <mach/common.h>
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#include <mach/imx-uart.h>
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#include <mach/iomux-mx3.h>
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#include <mach/hardware.h>
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#include <mach/mmc.h>
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#include "devices.h"
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static unsigned int devboard_pins[] = {
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/* UART1 */
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MX31_PIN_CTS2__CTS2, MX31_PIN_RTS2__RTS2,
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MX31_PIN_TXD2__TXD2, MX31_PIN_RXD2__RXD2,
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/* SDHC2 */
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MX31_PIN_PC_PWRON__SD2_DATA3, MX31_PIN_PC_VS1__SD2_DATA2,
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MX31_PIN_PC_READY__SD2_DATA1, MX31_PIN_PC_WAIT_B__SD2_DATA0,
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MX31_PIN_PC_CD2_B__SD2_CLK, MX31_PIN_PC_CD1_B__SD2_CMD,
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MX31_PIN_ATA_DIOR__GPIO3_28, MX31_PIN_ATA_DIOW__GPIO3_29,
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};
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static struct imxuart_platform_data uart_pdata = {
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.flags = IMXUART_HAVE_RTSCTS,
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};
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#define SDHC2_CD IOMUX_TO_GPIO(MX31_PIN_ATA_DIOR)
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#define SDHC2_WP IOMUX_TO_GPIO(MX31_PIN_ATA_DIOW)
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static int devboard_sdhc2_get_ro(struct device *dev)
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{
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return !gpio_get_value(SDHC2_WP);
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}
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static int devboard_sdhc2_init(struct device *dev, irq_handler_t detect_irq,
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void *data)
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{
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int ret;
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ret = gpio_request(SDHC2_CD, "sdhc-detect");
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if (ret)
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return ret;
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gpio_direction_input(SDHC2_CD);
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ret = gpio_request(SDHC2_WP, "sdhc-wp");
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if (ret)
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goto err_gpio_free;
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gpio_direction_input(SDHC2_WP);
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ret = request_irq(gpio_to_irq(SDHC2_CD), detect_irq,
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IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING,
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"sdhc2-card-detect", data);
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if (ret)
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goto err_gpio_free_2;
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return 0;
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err_gpio_free_2:
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gpio_free(SDHC2_WP);
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err_gpio_free:
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gpio_free(SDHC2_CD);
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return ret;
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}
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static void devboard_sdhc2_exit(struct device *dev, void *data)
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{
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free_irq(gpio_to_irq(SDHC2_CD), data);
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gpio_free(SDHC2_WP);
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gpio_free(SDHC2_CD);
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}
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static struct imxmmc_platform_data sdhc2_pdata = {
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.get_ro = devboard_sdhc2_get_ro,
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.init = devboard_sdhc2_init,
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.exit = devboard_sdhc2_exit,
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};
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/*
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* system init for baseboard usage. Will be called by mx31moboard init.
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*/
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void __init mx31moboard_devboard_init(void)
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{
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printk(KERN_INFO "Initializing mx31devboard peripherals\n");
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mxc_iomux_setup_multiple_pins(devboard_pins, ARRAY_SIZE(devboard_pins),
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"devboard");
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mxc_register_device(&mxc_uart_device1, &uart_pdata);
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mxc_register_device(&mxcsdhc_device1, &sdhc2_pdata);
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}
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