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
48 static 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 */
72 static const struct imxuart_platform_data uart_pdata __initconst = {
73 .flags = IMXUART_HAVE_RTSCTS,
74 };
75
76 /* MMC */
77
78 static 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
mxc_mmc1_get_ro(struct device * dev)83 static int mxc_mmc1_get_ro(struct device *dev)
84 {
85 return gpio_get_value(IOMUX_TO_GPIO(MX31_PIN_GPIO1_6));
86 }
87
mxc_mmc1_init(struct device * dev,irq_handler_t detect_irq,void * data)88 static 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
127 exit_free_wp:
128 gpio_free(gpio_wp);
129
130 exit_free_det:
131 gpio_free(gpio_det);
132
133 return ret;
134 }
135
mxc_mmc1_exit(struct device * dev,void * data)136 static 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
143 static 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
151 static int spi_internal_chipselect[] = {
152 MXC_SPI_CS(0),
153 MXC_SPI_CS(1),
154 MXC_SPI_CS(2),
155 };
156
157 static 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
164 static 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
179 static 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
mx31lite_db_init(void)185 void __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 }
197