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
|
/*
* 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/gpio.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/platform_device.h>
#include <linux/types.h>
#include <mach/common.h>
#include <mach/imx-uart.h>
#include <mach/iomux-mx3.h>
#include <mach/hardware.h>
#include <mach/mmc.h>
#include "devices.h"
static unsigned int devboard_pins[] = {
/* UART1 */
MX31_PIN_CTS2__CTS2, MX31_PIN_RTS2__RTS2,
MX31_PIN_TXD2__TXD2, MX31_PIN_RXD2__RXD2,
/* SDHC2 */
MX31_PIN_PC_PWRON__SD2_DATA3, MX31_PIN_PC_VS1__SD2_DATA2,
MX31_PIN_PC_READY__SD2_DATA1, MX31_PIN_PC_WAIT_B__SD2_DATA0,
MX31_PIN_PC_CD2_B__SD2_CLK, MX31_PIN_PC_CD1_B__SD2_CMD,
MX31_PIN_ATA_DIOR__GPIO3_28, MX31_PIN_ATA_DIOW__GPIO3_29,
};
static struct imxuart_platform_data uart_pdata = {
.flags = IMXUART_HAVE_RTSCTS,
};
#define SDHC2_CD IOMUX_TO_GPIO(MX31_PIN_ATA_DIOR)
#define SDHC2_WP IOMUX_TO_GPIO(MX31_PIN_ATA_DIOW)
static int devboard_sdhc2_get_ro(struct device *dev)
{
return !gpio_get_value(SDHC2_WP);
}
static int devboard_sdhc2_init(struct device *dev, irq_handler_t detect_irq,
void *data)
{
int ret;
ret = gpio_request(SDHC2_CD, "sdhc-detect");
if (ret)
return ret;
gpio_direction_input(SDHC2_CD);
ret = gpio_request(SDHC2_WP, "sdhc-wp");
if (ret)
goto err_gpio_free;
gpio_direction_input(SDHC2_WP);
ret = request_irq(gpio_to_irq(SDHC2_CD), detect_irq,
IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING,
"sdhc2-card-detect", data);
if (ret)
goto err_gpio_free_2;
return 0;
err_gpio_free_2:
gpio_free(SDHC2_WP);
err_gpio_free:
gpio_free(SDHC2_CD);
return ret;
}
static void devboard_sdhc2_exit(struct device *dev, void *data)
{
free_irq(gpio_to_irq(SDHC2_CD), data);
gpio_free(SDHC2_WP);
gpio_free(SDHC2_CD);
}
static struct imxmmc_platform_data sdhc2_pdata = {
.get_ro = devboard_sdhc2_get_ro,
.init = devboard_sdhc2_init,
.exit = devboard_sdhc2_exit,
};
/*
* system init for baseboard usage. Will be called by mx31moboard init.
*/
void __init mx31moboard_devboard_init(void)
{
printk(KERN_INFO "Initializing mx31devboard peripherals\n");
mxc_iomux_setup_multiple_pins(devboard_pins, ARRAY_SIZE(devboard_pins),
"devboard");
mxc_register_device(&mxc_uart_device1, &uart_pdata);
mxc_register_device(&mxcsdhc_device1, &sdhc2_pdata);
}
|
