1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
|
/*
* 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.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <linux/kernel.h>
#include <linux/types.h>
#include <linux/init.h>
#include <linux/gpio.h>
#include <linux/platform_device.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 <mach/hardware.h>
#include <mach/common.h>
#include <mach/imx-uart.h>
#include <mach/iomux-mx3.h>
#include <mach/board-mx31lite.h>
#include <mach/mmc.h>
#include <mach/spi.h>
#include "devices.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,
};
/* UART */
static struct imxuart_platform_data uart_pdata __initdata = {
.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 | PAD_CTL_100K_PU)
static int mxc_mmc1_get_ro(struct device *dev)
{
return gpio_get_value(IOMUX_TO_GPIO(MX31_PIN_LCS0));
}
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);
mxc_iomux_set_pad(MX31_PIN_SD1_DATA1, MMC_PAD_CFG);
mxc_iomux_set_pad(MX31_PIN_SD1_DATA2, MMC_PAD_CFG);
mxc_iomux_set_pad(MX31_PIN_SD1_DATA3, MMC_PAD_CFG);
mxc_iomux_set_pad(MX31_PIN_SD1_CLK, MMC_PAD_CFG);
mxc_iomux_set_pad(MX31_PIN_SD1_CMD, 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(IOMUX_TO_IRQ(MX31_PIN_DCD_DCE1), detect_irq,
IRQF_DISABLED | 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(IOMUX_TO_IRQ(MX31_PIN_GPIO1_1), data);
}
static struct imxmmc_platform_data mmc_pdata = {
.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 struct spi_imx_master spi0_pdata = {
.chipselect = spi_internal_chipselect,
.num_chipselect = ARRAY_SIZE(spi_internal_chipselect),
};
/* GPIO LEDs */
static struct gpio_led litekit_leds[] = {
{
.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 struct gpio_led_platform_data litekit_led_platform_data = {
.leds = litekit_leds,
.num_leds = ARRAY_SIZE(litekit_leds),
};
static struct platform_device litekit_led_device = {
.name = "leds-gpio",
.id = -1,
.dev = {
.platform_data = &litekit_led_platform_data,
},
};
void __init mx31lite_db_init(void)
{
mxc_iomux_setup_multiple_pins(litekit_db_board_pins,
ARRAY_SIZE(litekit_db_board_pins),
"development board pins");
mxc_register_device(&mxc_uart_device0, &uart_pdata);
mxc_register_device(&mxcsdhc_device0, &mmc_pdata);
mxc_register_device(&mxc_spi_device0, &spi0_pdata);
platform_device_register(&litekit_led_device);
}
|
