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 "board-mx31lite.h"
35#include "common.h"
36#include "devices-imx31.h"
37#include "hardware.h"
38#include "iomux-mx3.h"
39
40/*
41 * This file contains board-specific initialization routines for the
42 * LogicPD i.MX31 SOM-LV development board, aka 'LiteKit'.
43 * If you design an own baseboard for the module, use this file as base
44 * for support code.
45 */
46
47static unsigned int litekit_db_board_pins[] __initdata = {
48	/* UART1 */
49	MX31_PIN_CTS1__CTS1,
50	MX31_PIN_RTS1__RTS1,
51	MX31_PIN_TXD1__TXD1,
52	MX31_PIN_RXD1__RXD1,
53	/* SPI 0 */
54	MX31_PIN_CSPI1_SCLK__SCLK,
55	MX31_PIN_CSPI1_MOSI__MOSI,
56	MX31_PIN_CSPI1_MISO__MISO,
57	MX31_PIN_CSPI1_SPI_RDY__SPI_RDY,
58	MX31_PIN_CSPI1_SS0__SS0,
59	MX31_PIN_CSPI1_SS1__SS1,
60	MX31_PIN_CSPI1_SS2__SS2,
61	/* SDHC1 */
62	MX31_PIN_SD1_DATA0__SD1_DATA0,
63	MX31_PIN_SD1_DATA1__SD1_DATA1,
64	MX31_PIN_SD1_DATA2__SD1_DATA2,
65	MX31_PIN_SD1_DATA3__SD1_DATA3,
66	MX31_PIN_SD1_CLK__SD1_CLK,
67	MX31_PIN_SD1_CMD__SD1_CMD,
68};
69
70/* UART */
71static const struct imxuart_platform_data uart_pdata __initconst = {
72	.flags = IMXUART_HAVE_RTSCTS,
73};
74
75/* MMC */
76
77static int gpio_det, gpio_wp;
78
79#define MMC_PAD_CFG (PAD_CTL_DRV_MAX | PAD_CTL_SRE_FAST | PAD_CTL_HYS_CMOS | \
80		     PAD_CTL_ODE_CMOS)
81
82static int mxc_mmc1_get_ro(struct device *dev)
83{
84	return gpio_get_value(IOMUX_TO_GPIO(MX31_PIN_GPIO1_6));
85}
86
87static int mxc_mmc1_init(struct device *dev,
88			 irq_handler_t detect_irq, void *data)
89{
90	int ret;
91
92	gpio_det = IOMUX_TO_GPIO(MX31_PIN_DCD_DCE1);
93	gpio_wp = IOMUX_TO_GPIO(MX31_PIN_GPIO1_6);
94
95	mxc_iomux_set_pad(MX31_PIN_SD1_DATA0,
96			  MMC_PAD_CFG | PAD_CTL_PUE_PUD | PAD_CTL_100K_PU);
97	mxc_iomux_set_pad(MX31_PIN_SD1_DATA1,
98			  MMC_PAD_CFG | PAD_CTL_PUE_PUD | PAD_CTL_100K_PU);
99	mxc_iomux_set_pad(MX31_PIN_SD1_DATA2,
100			  MMC_PAD_CFG | PAD_CTL_PUE_PUD | PAD_CTL_100K_PU);
101	mxc_iomux_set_pad(MX31_PIN_SD1_DATA3,
102			  MMC_PAD_CFG | PAD_CTL_PUE_PUD | PAD_CTL_100K_PU);
103	mxc_iomux_set_pad(MX31_PIN_SD1_CMD,
104			  MMC_PAD_CFG | PAD_CTL_PUE_PUD | PAD_CTL_100K_PU);
105	mxc_iomux_set_pad(MX31_PIN_SD1_CLK, MMC_PAD_CFG);
106
107	ret = gpio_request(gpio_det, "MMC detect");
108	if (ret)
109		return ret;
110
111	ret = gpio_request(gpio_wp, "MMC w/p");
112	if (ret)
113		goto exit_free_det;
114
115	gpio_direction_input(gpio_det);
116	gpio_direction_input(gpio_wp);
117
118	ret = request_irq(gpio_to_irq(IOMUX_TO_GPIO(MX31_PIN_DCD_DCE1)),
119			  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(gpio_to_irq(IOMUX_TO_GPIO(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();
195	imx31_add_mxc_rtc();
196}
197