diff options
Diffstat (limited to 'kernel/arch/arm/mach-imx/mx31lite-db.c')
| -rw-r--r-- | kernel/arch/arm/mach-imx/mx31lite-db.c | 196 |
1 files changed, 196 insertions, 0 deletions
diff --git a/kernel/arch/arm/mach-imx/mx31lite-db.c b/kernel/arch/arm/mach-imx/mx31lite-db.c new file mode 100644 index 000000000..5a160b7e4 --- /dev/null +++ b/kernel/arch/arm/mach-imx/mx31lite-db.c @@ -0,0 +1,196 @@ +/* + * 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(); +} |