137 lines
3.7 KiB
C
137 lines
3.7 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/hardware.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/mmc.h>
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#include "devices.h"
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static unsigned int marxbot_pins[] = {
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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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/* CSI */
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MX31_PIN_CSI_D4__CSI_D4, MX31_PIN_CSI_D5__CSI_D5,
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MX31_PIN_CSI_D6__CSI_D6, MX31_PIN_CSI_D7__CSI_D7,
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MX31_PIN_CSI_D8__CSI_D8, MX31_PIN_CSI_D9__CSI_D9,
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MX31_PIN_CSI_D10__CSI_D10, MX31_PIN_CSI_D11__CSI_D11,
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MX31_PIN_CSI_D12__CSI_D12, MX31_PIN_CSI_D13__CSI_D13,
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MX31_PIN_CSI_D14__CSI_D14, MX31_PIN_CSI_D15__CSI_D15,
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MX31_PIN_CSI_HSYNC__CSI_HSYNC, MX31_PIN_CSI_MCLK__CSI_MCLK,
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MX31_PIN_CSI_PIXCLK__CSI_PIXCLK, MX31_PIN_CSI_VSYNC__CSI_VSYNC,
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MX31_PIN_GPIO3_0__GPIO3_0, MX31_PIN_GPIO3_1__GPIO3_1,
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MX31_PIN_TXD2__GPIO1_28,
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/* dsPIC resets */
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MX31_PIN_STXD5__GPIO1_21, MX31_PIN_SRXD5__GPIO1_22,
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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 marxbot_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 marxbot_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 marxbot_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 = marxbot_sdhc2_get_ro,
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.init = marxbot_sdhc2_init,
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.exit = marxbot_sdhc2_exit,
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};
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#define TRSLAT_RST_B IOMUX_TO_GPIO(MX31_PIN_STXD5)
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#define DSPICS_RST_B IOMUX_TO_GPIO(MX31_PIN_SRXD5)
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static void dspics_resets_init(void)
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{
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if (!gpio_request(TRSLAT_RST_B, "translator-rst")) {
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gpio_direction_output(TRSLAT_RST_B, 1);
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gpio_export(TRSLAT_RST_B, false);
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}
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if (!gpio_request(DSPICS_RST_B, "dspics-rst")) {
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gpio_direction_output(DSPICS_RST_B, 1);
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gpio_export(DSPICS_RST_B, false);
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}
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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_marxbot_init(void)
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{
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printk(KERN_INFO "Initializing mx31marxbot peripherals\n");
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mxc_iomux_setup_multiple_pins(marxbot_pins, ARRAY_SIZE(marxbot_pins),
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"marxbot");
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dspics_resets_init();
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mxc_register_device(&mxcsdhc_device1, &sdhc2_pdata);
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}
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