212 lines
5.4 KiB
C
212 lines
5.4 KiB
C
/*
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* LogicPD i.MX31 SOM-LV development board support
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*
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* Copyright (c) 2009 Daniel Mack <daniel@caiaq.de>
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*
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* based on code for other MX31 boards,
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*
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* Copyright 2005-2007 Freescale Semiconductor
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* Copyright (c) 2009 Alberto Panizzo <maramaopercheseimorto@gmail.com>
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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/kernel.h>
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#include <linux/types.h>
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#include <linux/init.h>
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#include <linux/gpio.h>
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#include <linux/leds.h>
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#include <linux/platform_device.h>
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#include <asm/mach-types.h>
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#include <asm/mach/arch.h>
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#include <asm/mach/map.h>
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#include <mach/hardware.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/board-mx31lite.h>
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#include <mach/mmc.h>
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#include <mach/spi.h>
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#include "devices.h"
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/*
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* This file contains board-specific initialization routines for the
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* LogicPD i.MX31 SOM-LV development board, aka 'LiteKit'.
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* If you design an own baseboard for the module, use this file as base
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* for support code.
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*/
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static unsigned int litekit_db_board_pins[] __initdata = {
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/* UART1 */
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MX31_PIN_CTS1__CTS1,
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MX31_PIN_RTS1__RTS1,
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MX31_PIN_TXD1__TXD1,
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MX31_PIN_RXD1__RXD1,
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/* SPI 0 */
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MX31_PIN_CSPI1_SCLK__SCLK,
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MX31_PIN_CSPI1_MOSI__MOSI,
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MX31_PIN_CSPI1_MISO__MISO,
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MX31_PIN_CSPI1_SPI_RDY__SPI_RDY,
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MX31_PIN_CSPI1_SS0__SS0,
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MX31_PIN_CSPI1_SS1__SS1,
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MX31_PIN_CSPI1_SS2__SS2,
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/* SDHC1 */
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MX31_PIN_SD1_DATA0__SD1_DATA0,
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MX31_PIN_SD1_DATA1__SD1_DATA1,
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MX31_PIN_SD1_DATA2__SD1_DATA2,
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MX31_PIN_SD1_DATA3__SD1_DATA3,
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MX31_PIN_SD1_CLK__SD1_CLK,
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MX31_PIN_SD1_CMD__SD1_CMD,
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};
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/* UART */
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static struct imxuart_platform_data uart_pdata __initdata = {
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.flags = IMXUART_HAVE_RTSCTS,
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};
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/* MMC */
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static int gpio_det, gpio_wp;
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#define MMC_PAD_CFG (PAD_CTL_DRV_MAX | PAD_CTL_SRE_FAST | PAD_CTL_HYS_CMOS | \
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PAD_CTL_ODE_CMOS)
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static int mxc_mmc1_get_ro(struct device *dev)
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{
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return gpio_get_value(IOMUX_TO_GPIO(MX31_PIN_GPIO1_6));
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}
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static int mxc_mmc1_init(struct device *dev,
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irq_handler_t detect_irq, void *data)
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{
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int ret;
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gpio_det = IOMUX_TO_GPIO(MX31_PIN_DCD_DCE1);
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gpio_wp = IOMUX_TO_GPIO(MX31_PIN_GPIO1_6);
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mxc_iomux_set_pad(MX31_PIN_SD1_DATA0,
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MMC_PAD_CFG | PAD_CTL_PUE_PUD | PAD_CTL_100K_PU);
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mxc_iomux_set_pad(MX31_PIN_SD1_DATA1,
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MMC_PAD_CFG | PAD_CTL_PUE_PUD | PAD_CTL_100K_PU);
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mxc_iomux_set_pad(MX31_PIN_SD1_DATA2,
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MMC_PAD_CFG | PAD_CTL_PUE_PUD | PAD_CTL_100K_PU);
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mxc_iomux_set_pad(MX31_PIN_SD1_DATA3,
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MMC_PAD_CFG | PAD_CTL_PUE_PUD | PAD_CTL_100K_PU);
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mxc_iomux_set_pad(MX31_PIN_SD1_CMD,
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MMC_PAD_CFG | PAD_CTL_PUE_PUD | PAD_CTL_100K_PU);
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mxc_iomux_set_pad(MX31_PIN_SD1_CLK, MMC_PAD_CFG);
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ret = gpio_request(gpio_det, "MMC detect");
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if (ret)
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return ret;
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ret = gpio_request(gpio_wp, "MMC w/p");
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if (ret)
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goto exit_free_det;
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gpio_direction_input(gpio_det);
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gpio_direction_input(gpio_wp);
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ret = request_irq(IOMUX_TO_IRQ(MX31_PIN_DCD_DCE1), detect_irq,
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IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING,
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"MMC detect", data);
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if (ret)
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goto exit_free_wp;
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return 0;
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exit_free_wp:
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gpio_free(gpio_wp);
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exit_free_det:
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gpio_free(gpio_det);
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return ret;
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}
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static void mxc_mmc1_exit(struct device *dev, void *data)
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{
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gpio_free(gpio_det);
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gpio_free(gpio_wp);
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free_irq(IOMUX_TO_IRQ(MX31_PIN_DCD_DCE1), data);
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}
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static struct imxmmc_platform_data mmc_pdata = {
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.get_ro = mxc_mmc1_get_ro,
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.init = mxc_mmc1_init,
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.exit = mxc_mmc1_exit,
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};
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/* SPI */
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static int spi_internal_chipselect[] = {
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MXC_SPI_CS(0),
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MXC_SPI_CS(1),
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MXC_SPI_CS(2),
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};
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static struct spi_imx_master spi0_pdata = {
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.chipselect = spi_internal_chipselect,
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.num_chipselect = ARRAY_SIZE(spi_internal_chipselect),
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};
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/* GPIO LEDs */
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static struct gpio_led litekit_leds[] = {
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{
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.name = "GPIO0",
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.gpio = IOMUX_TO_GPIO(MX31_PIN_COMPARE),
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.active_low = 1,
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.default_state = LEDS_GPIO_DEFSTATE_OFF,
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},
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{
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.name = "GPIO1",
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.gpio = IOMUX_TO_GPIO(MX31_PIN_CAPTURE),
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.active_low = 1,
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.default_state = LEDS_GPIO_DEFSTATE_OFF,
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}
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};
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static struct gpio_led_platform_data litekit_led_platform_data = {
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.leds = litekit_leds,
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.num_leds = ARRAY_SIZE(litekit_leds),
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};
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static struct platform_device litekit_led_device = {
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.name = "leds-gpio",
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.id = -1,
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.dev = {
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.platform_data = &litekit_led_platform_data,
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},
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};
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void __init mx31lite_db_init(void)
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{
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mxc_iomux_setup_multiple_pins(litekit_db_board_pins,
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ARRAY_SIZE(litekit_db_board_pins),
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"development board pins");
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mxc_register_device(&mxc_uart_device0, &uart_pdata);
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mxc_register_device(&mxcsdhc_device0, &mmc_pdata);
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mxc_register_device(&mxc_spi_device0, &spi0_pdata);
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platform_device_register(&litekit_led_device);
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mxc_register_device(&imx_wdt_device0, NULL);
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mxc_register_device(&imx_rtc_device0, NULL);
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}
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