45b131a78c
This support both sdhc1 and sdhc2 with WP and CD for the marxbot and devboard mx31moboard baseboards. sdhc2 is present on both, but is not directly included in the mx31moboard file because a third baseboard (not supported yet) without sdhc2 is planned. Changes since v1: removed pin initialization from init/exit function and taken different comments into account Changes since v2: pin initialiation now is done in another patch for all current mx31moboard pins Signed-off-by: Valentin Longchamp <valentin.longchamp@epfl.ch> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
89 lines
2.6 KiB
C
89 lines
2.6 KiB
C
/*
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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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return 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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}
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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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}
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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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