summaryrefslogtreecommitdiff
path: root/arch/arm/mach-mx3/mx31moboard-marxbot.c
blob: 3e2b73051b94caa21a0dd6c0fb4bd9ad7d9bb5d0 (plain)
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
/*
 * 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/hardware.h>
#include <mach/imx-uart.h>
#include <mach/iomux-mx3.h>
#include <mach/mmc.h>

#include "devices.h"

static unsigned int marxbot_pins[] = {
	/* 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,
	/* CSI */
	MX31_PIN_CSI_D4__CSI_D4, MX31_PIN_CSI_D5__CSI_D5,
	MX31_PIN_CSI_D6__CSI_D6, MX31_PIN_CSI_D7__CSI_D7,
	MX31_PIN_CSI_D8__CSI_D8, MX31_PIN_CSI_D9__CSI_D9,
	MX31_PIN_CSI_D10__CSI_D10, MX31_PIN_CSI_D11__CSI_D11,
	MX31_PIN_CSI_D12__CSI_D12, MX31_PIN_CSI_D13__CSI_D13,
	MX31_PIN_CSI_D14__CSI_D14, MX31_PIN_CSI_D15__CSI_D15,
	MX31_PIN_CSI_HSYNC__CSI_HSYNC, MX31_PIN_CSI_MCLK__CSI_MCLK,
	MX31_PIN_CSI_PIXCLK__CSI_PIXCLK, MX31_PIN_CSI_VSYNC__CSI_VSYNC,
	MX31_PIN_GPIO3_0__GPIO3_0, MX31_PIN_GPIO3_1__GPIO3_1,
	MX31_PIN_TXD2__GPIO1_28,
	/* dsPIC resets */
	MX31_PIN_STXD5__GPIO1_21, MX31_PIN_SRXD5__GPIO1_22,
};

#define SDHC2_CD IOMUX_TO_GPIO(MX31_PIN_ATA_DIOR)
#define SDHC2_WP IOMUX_TO_GPIO(MX31_PIN_ATA_DIOW)

static int marxbot_sdhc2_get_ro(struct device *dev)
{
	return gpio_get_value(SDHC2_WP);
}

static int marxbot_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 marxbot_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	= marxbot_sdhc2_get_ro,
	.init	= marxbot_sdhc2_init,
	.exit	= marxbot_sdhc2_exit,
};

#define TRSLAT_RST_B	IOMUX_TO_GPIO(MX31_PIN_STXD5)
#define DSPICS_RST_B	IOMUX_TO_GPIO(MX31_PIN_SRXD5)

static void dspics_resets_init(void)
{
	if (!gpio_request(TRSLAT_RST_B, "translator-rst")) {
		gpio_direction_output(TRSLAT_RST_B, 1);
		gpio_export(TRSLAT_RST_B, false);
	}

	if (!gpio_request(DSPICS_RST_B, "dspics-rst")) {
		gpio_direction_output(DSPICS_RST_B, 1);
		gpio_export(DSPICS_RST_B, false);
	}
}

/*
 * system init for baseboard usage. Will be called by mx31moboard init.
 */
void __init mx31moboard_marxbot_init(void)
{
	printk(KERN_INFO "Initializing mx31marxbot peripherals\n");

	mxc_iomux_setup_multiple_pins(marxbot_pins, ARRAY_SIZE(marxbot_pins),
		"marxbot");

	dspics_resets_init();

	mxc_register_device(&mxcsdhc_device1, &sdhc2_pdata);
}