1/*
  2 *  LogicPD i.MX31 SOM-LV development board support
  3 *
  4 *    Copyright (c) 2009 Daniel Mack <daniel@caiaq.de>
  5 *
  6 *  based on code for other MX31 boards,
  7 *
  8 *    Copyright 2005-2007 Freescale Semiconductor
  9 *    Copyright (c) 2009 Alberto Panizzo <maramaopercheseimorto@gmail.com>
 10 *    Copyright (C) 2009 Valentin Longchamp, EPFL Mobots group
 11 *
 12 * This program is free software; you can redistribute it and/or modify
 13 * it under the terms of the GNU General Public License as published by
 14 * the Free Software Foundation; either version 2 of the License, or
 15 * (at your option) any later version.
 16 *
 17 * This program is distributed in the hope that it will be useful,
 18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 20 * GNU General Public License for more details.
 21 */
 22
 23#include <linux/kernel.h>
 24#include <linux/types.h>
 25#include <linux/init.h>
 26#include <linux/gpio.h>
 27#include <linux/leds.h>
 28#include <linux/platform_device.h>
 29
 30#include <asm/mach-types.h>
 31#include <asm/mach/arch.h>
 32#include <asm/mach/map.h>
 33
 34#include <mach/hardware.h>
 35#include <mach/common.h>
 36#include <mach/iomux-mx3.h>
 37#include <mach/board-mx31lite.h>
 38
 39#include "devices-imx31.h"
 40
 41/*
 42 * This file contains board-specific initialization routines for the
 43 * LogicPD i.MX31 SOM-LV development board, aka 'LiteKit'.
 44 * If you design an own baseboard for the module, use this file as base
 45 * for support code.
 46 */
 47
 48static unsigned int litekit_db_board_pins[] __initdata = {
 49	/* UART1 */
 50	MX31_PIN_CTS1__CTS1,
 51	MX31_PIN_RTS1__RTS1,
 52	MX31_PIN_TXD1__TXD1,
 53	MX31_PIN_RXD1__RXD1,
 54	/* SPI 0 */
 55	MX31_PIN_CSPI1_SCLK__SCLK,
 56	MX31_PIN_CSPI1_MOSI__MOSI,
 57	MX31_PIN_CSPI1_MISO__MISO,
 58	MX31_PIN_CSPI1_SPI_RDY__SPI_RDY,
 59	MX31_PIN_CSPI1_SS0__SS0,
 60	MX31_PIN_CSPI1_SS1__SS1,
 61	MX31_PIN_CSPI1_SS2__SS2,
 62	/* SDHC1 */
 63	MX31_PIN_SD1_DATA0__SD1_DATA0,
 64	MX31_PIN_SD1_DATA1__SD1_DATA1,
 65	MX31_PIN_SD1_DATA2__SD1_DATA2,
 66	MX31_PIN_SD1_DATA3__SD1_DATA3,
 67	MX31_PIN_SD1_CLK__SD1_CLK,
 68	MX31_PIN_SD1_CMD__SD1_CMD,
 69};
 70
 71/* UART */
 72static const struct imxuart_platform_data uart_pdata __initconst = {
 73	.flags = IMXUART_HAVE_RTSCTS,
 74};
 75
 76/* MMC */
 77
 78static int gpio_det, gpio_wp;
 79
 80#define MMC_PAD_CFG (PAD_CTL_DRV_MAX | PAD_CTL_SRE_FAST | PAD_CTL_HYS_CMOS | \
 81		     PAD_CTL_ODE_CMOS)
 82
 83static int mxc_mmc1_get_ro(struct device *dev)
 84{
 85	return gpio_get_value(IOMUX_TO_GPIO(MX31_PIN_GPIO1_6));
 86}
 87
 88static int mxc_mmc1_init(struct device *dev,
 89			 irq_handler_t detect_irq, void *data)
 90{
 91	int ret;
 92
 93	gpio_det = IOMUX_TO_GPIO(MX31_PIN_DCD_DCE1);
 94	gpio_wp = IOMUX_TO_GPIO(MX31_PIN_GPIO1_6);
 95
 96	mxc_iomux_set_pad(MX31_PIN_SD1_DATA0,
 97			  MMC_PAD_CFG | PAD_CTL_PUE_PUD | PAD_CTL_100K_PU);
 98	mxc_iomux_set_pad(MX31_PIN_SD1_DATA1,
 99			  MMC_PAD_CFG | PAD_CTL_PUE_PUD | PAD_CTL_100K_PU);
100	mxc_iomux_set_pad(MX31_PIN_SD1_DATA2,
101			  MMC_PAD_CFG | PAD_CTL_PUE_PUD | PAD_CTL_100K_PU);
102	mxc_iomux_set_pad(MX31_PIN_SD1_DATA3,
103			  MMC_PAD_CFG | PAD_CTL_PUE_PUD | PAD_CTL_100K_PU);
104	mxc_iomux_set_pad(MX31_PIN_SD1_CMD,
105			  MMC_PAD_CFG | PAD_CTL_PUE_PUD | PAD_CTL_100K_PU);
106	mxc_iomux_set_pad(MX31_PIN_SD1_CLK, MMC_PAD_CFG);
107
108	ret = gpio_request(gpio_det, "MMC detect");
109	if (ret)
110		return ret;
111
112	ret = gpio_request(gpio_wp, "MMC w/p");
113	if (ret)
114		goto exit_free_det;
115
116	gpio_direction_input(gpio_det);
117	gpio_direction_input(gpio_wp);
118
119	ret = request_irq(IOMUX_TO_IRQ(MX31_PIN_DCD_DCE1), detect_irq,
120			  IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING,
121			  "MMC detect", data);
122	if (ret)
123		goto exit_free_wp;
124
125	return 0;
126
127exit_free_wp:
128	gpio_free(gpio_wp);
129
130exit_free_det:
131	gpio_free(gpio_det);
132
133	return ret;
134}
135
136static void mxc_mmc1_exit(struct device *dev, void *data)
137{
138	gpio_free(gpio_det);
139	gpio_free(gpio_wp);
140	free_irq(IOMUX_TO_IRQ(MX31_PIN_DCD_DCE1), data);
141}
142
143static const struct imxmmc_platform_data mmc_pdata __initconst = {
144	.get_ro	 = mxc_mmc1_get_ro,
145	.init	   = mxc_mmc1_init,
146	.exit	   = mxc_mmc1_exit,
147};
148
149/* SPI */
150
151static int spi_internal_chipselect[] = {
152	MXC_SPI_CS(0),
153	MXC_SPI_CS(1),
154	MXC_SPI_CS(2),
155};
156
157static const struct spi_imx_master spi0_pdata __initconst = {
158	.chipselect	= spi_internal_chipselect,
159	.num_chipselect	= ARRAY_SIZE(spi_internal_chipselect),
160};
161
162/* GPIO LEDs */
163
164static const struct gpio_led litekit_leds[] __initconst = {
165	{
166		.name           = "GPIO0",
167		.gpio           = IOMUX_TO_GPIO(MX31_PIN_COMPARE),
168		.active_low     = 1,
169		.default_state  = LEDS_GPIO_DEFSTATE_OFF,
170	},
171	{
172		.name           = "GPIO1",
173		.gpio           = IOMUX_TO_GPIO(MX31_PIN_CAPTURE),
174		.active_low     = 1,
175		.default_state  = LEDS_GPIO_DEFSTATE_OFF,
176	}
177};
178
179static const struct gpio_led_platform_data
180		litekit_led_platform_data __initconst = {
181	.leds           = litekit_leds,
182	.num_leds       = ARRAY_SIZE(litekit_leds),
183};
184
185void __init mx31lite_db_init(void)
186{
187	mxc_iomux_setup_multiple_pins(litekit_db_board_pins,
188					ARRAY_SIZE(litekit_db_board_pins),
189					"development board pins");
190	imx31_add_imx_uart0(&uart_pdata);
191	imx31_add_mxc_mmc(0, &mmc_pdata);
192	imx31_add_spi_imx0(&spi0_pdata);
193	gpio_led_register_device(-1, &litekit_led_platform_data);
194	imx31_add_imx2_wdt(NULL);
195	imx31_add_mxc_rtc(NULL);
196}