mx31lite-db.c
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/*
* LogicPD i.MX31 SOM-LV development board support
*
* Copyright (c) 2009 Daniel Mack <daniel@caiaq.de>
*
* based on code for other MX31 boards,
*
* Copyright 2005-2007 Freescale Semiconductor
* Copyright (c) 2009 Alberto Panizzo <maramaopercheseimorto@gmail.com>
* 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/kernel.h>
#include <linux/types.h>
#include <linux/init.h>
#include <linux/gpio.h>
#include <linux/leds.h>
#include <linux/platform_device.h>
#include <asm/mach-types.h>
#include <asm/mach/arch.h>
#include <asm/mach/map.h>
#include "board-mx31lite.h"
#include "common.h"
#include "devices-imx31.h"
#include "hardware.h"
#include "iomux-mx3.h"
/*
* This file contains board-specific initialization routines for the
* LogicPD i.MX31 SOM-LV development board, aka 'LiteKit'.
* If you design an own baseboard for the module, use this file as base
* for support code.
*/
static unsigned int litekit_db_board_pins[] __initdata = {
/* UART1 */
MX31_PIN_CTS1__CTS1,
MX31_PIN_RTS1__RTS1,
MX31_PIN_TXD1__TXD1,
MX31_PIN_RXD1__RXD1,
/* SPI 0 */
MX31_PIN_CSPI1_SCLK__SCLK,
MX31_PIN_CSPI1_MOSI__MOSI,
MX31_PIN_CSPI1_MISO__MISO,
MX31_PIN_CSPI1_SPI_RDY__SPI_RDY,
MX31_PIN_CSPI1_SS0__SS0,
MX31_PIN_CSPI1_SS1__SS1,
MX31_PIN_CSPI1_SS2__SS2,
/* SDHC1 */
MX31_PIN_SD1_DATA0__SD1_DATA0,
MX31_PIN_SD1_DATA1__SD1_DATA1,
MX31_PIN_SD1_DATA2__SD1_DATA2,
MX31_PIN_SD1_DATA3__SD1_DATA3,
MX31_PIN_SD1_CLK__SD1_CLK,
MX31_PIN_SD1_CMD__SD1_CMD,
};
/* UART */
static const struct imxuart_platform_data uart_pdata __initconst = {
.flags = IMXUART_HAVE_RTSCTS,
};
/* MMC */
static int gpio_det, gpio_wp;
#define MMC_PAD_CFG (PAD_CTL_DRV_MAX | PAD_CTL_SRE_FAST | PAD_CTL_HYS_CMOS | \
PAD_CTL_ODE_CMOS)
static int mxc_mmc1_get_ro(struct device *dev)
{
return gpio_get_value(IOMUX_TO_GPIO(MX31_PIN_GPIO1_6));
}
static int mxc_mmc1_init(struct device *dev,
irq_handler_t detect_irq, void *data)
{
int ret;
gpio_det = IOMUX_TO_GPIO(MX31_PIN_DCD_DCE1);
gpio_wp = IOMUX_TO_GPIO(MX31_PIN_GPIO1_6);
mxc_iomux_set_pad(MX31_PIN_SD1_DATA0,
MMC_PAD_CFG | PAD_CTL_PUE_PUD | PAD_CTL_100K_PU);
mxc_iomux_set_pad(MX31_PIN_SD1_DATA1,
MMC_PAD_CFG | PAD_CTL_PUE_PUD | PAD_CTL_100K_PU);
mxc_iomux_set_pad(MX31_PIN_SD1_DATA2,
MMC_PAD_CFG | PAD_CTL_PUE_PUD | PAD_CTL_100K_PU);
mxc_iomux_set_pad(MX31_PIN_SD1_DATA3,
MMC_PAD_CFG | PAD_CTL_PUE_PUD | PAD_CTL_100K_PU);
mxc_iomux_set_pad(MX31_PIN_SD1_CMD,
MMC_PAD_CFG | PAD_CTL_PUE_PUD | PAD_CTL_100K_PU);
mxc_iomux_set_pad(MX31_PIN_SD1_CLK, MMC_PAD_CFG);
ret = gpio_request(gpio_det, "MMC detect");
if (ret)
return ret;
ret = gpio_request(gpio_wp, "MMC w/p");
if (ret)
goto exit_free_det;
gpio_direction_input(gpio_det);
gpio_direction_input(gpio_wp);
ret = request_irq(gpio_to_irq(IOMUX_TO_GPIO(MX31_PIN_DCD_DCE1)),
detect_irq,
IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING,
"MMC detect", data);
if (ret)
goto exit_free_wp;
return 0;
exit_free_wp:
gpio_free(gpio_wp);
exit_free_det:
gpio_free(gpio_det);
return ret;
}
static void mxc_mmc1_exit(struct device *dev, void *data)
{
gpio_free(gpio_det);
gpio_free(gpio_wp);
free_irq(gpio_to_irq(IOMUX_TO_GPIO(MX31_PIN_DCD_DCE1)), data);
}
static const struct imxmmc_platform_data mmc_pdata __initconst = {
.get_ro = mxc_mmc1_get_ro,
.init = mxc_mmc1_init,
.exit = mxc_mmc1_exit,
};
/* SPI */
static int spi_internal_chipselect[] = {
MXC_SPI_CS(0),
MXC_SPI_CS(1),
MXC_SPI_CS(2),
};
static const struct spi_imx_master spi0_pdata __initconst = {
.chipselect = spi_internal_chipselect,
.num_chipselect = ARRAY_SIZE(spi_internal_chipselect),
};
/* GPIO LEDs */
static const struct gpio_led litekit_leds[] __initconst = {
{
.name = "GPIO0",
.gpio = IOMUX_TO_GPIO(MX31_PIN_COMPARE),
.active_low = 1,
.default_state = LEDS_GPIO_DEFSTATE_OFF,
},
{
.name = "GPIO1",
.gpio = IOMUX_TO_GPIO(MX31_PIN_CAPTURE),
.active_low = 1,
.default_state = LEDS_GPIO_DEFSTATE_OFF,
}
};
static const struct gpio_led_platform_data
litekit_led_platform_data __initconst = {
.leds = litekit_leds,
.num_leds = ARRAY_SIZE(litekit_leds),
};
void __init mx31lite_db_init(void)
{
mxc_iomux_setup_multiple_pins(litekit_db_board_pins,
ARRAY_SIZE(litekit_db_board_pins),
"development board pins");
imx31_add_imx_uart0(&uart_pdata);
imx31_add_mxc_mmc(0, &mmc_pdata);
imx31_add_spi_imx0(&spi0_pdata);
gpio_led_register_device(-1, &litekit_led_platform_data);
imx31_add_imx2_wdt();
imx31_add_mxc_rtc();
}