summaryrefslogtreecommitdiffstats
path: root/arch/arm/mach-ep93xx/simone.c
blob: 7bb540c421ee30314b93eb8c0f5247070b349b19 (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
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
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
/*
 * arch/arm/mach-ep93xx/simone.c
 * Simplemachines Sim.One support.
 *
 * Copyright (C) 2010 Ryan Mallon
 *
 * Based on the 2.6.24.7 support:
 *   Copyright (C) 2009 Simplemachines
 *   MMC support by Peter Ivanov <ivanovp@gmail.com>, 2007
 *
 * 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.
 *
 */

#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/platform_device.h>
#include <linux/i2c.h>
#include <linux/i2c-gpio.h>
#include <linux/mmc/host.h>
#include <linux/spi/spi.h>
#include <linux/spi/mmc_spi.h>
#include <linux/platform_data/video-ep93xx.h>
#include <linux/platform_data/spi-ep93xx.h>
#include <linux/gpio.h>

#include <mach/hardware.h>
#include <mach/gpio-ep93xx.h>

#include <asm/mach-types.h>
#include <asm/mach/arch.h>

#include "soc.h"

static struct ep93xx_eth_data __initdata simone_eth_data = {
	.phy_id		= 1,
};

static struct ep93xxfb_mach_info __initdata simone_fb_info = {
	.flags		= EP93XXFB_USE_SDCSN0 | EP93XXFB_PCLK_FALLING,
};

/*
 * GPIO lines used for MMC card detection.
 */
#define MMC_CARD_DETECT_GPIO EP93XX_GPIO_LINE_EGPIO0

/*
 * Up to v1.3, the Sim.One used SFRMOUT as SD card chip select, but this goes
 * low between multi-message command blocks. From v1.4, it uses a GPIO instead.
 * v1.3 parts will still work, since the signal on SFRMOUT is automatic.
 */
#define MMC_CHIP_SELECT_GPIO EP93XX_GPIO_LINE_EGPIO1

/*
 * MMC SPI chip select GPIO handling. If you are using SFRMOUT (SFRM1) signal,
 * you can leave these empty and pass NULL as .controller_data.
 */

static int simone_mmc_spi_setup(struct spi_device *spi)
{
	unsigned int gpio = MMC_CHIP_SELECT_GPIO;
	int err;

	err = gpio_request(gpio, spi->modalias);
	if (err)
		return err;

	err = gpio_direction_output(gpio, 1);
	if (err) {
		gpio_free(gpio);
		return err;
	}

	return 0;
}

static void simone_mmc_spi_cleanup(struct spi_device *spi)
{
	unsigned int gpio = MMC_CHIP_SELECT_GPIO;

	gpio_set_value(gpio, 1);
	gpio_direction_input(gpio);
	gpio_free(gpio);
}

static void simone_mmc_spi_cs_control(struct spi_device *spi, int value)
{
	gpio_set_value(MMC_CHIP_SELECT_GPIO, value);
}

static struct ep93xx_spi_chip_ops simone_mmc_spi_ops = {
	.setup		= simone_mmc_spi_setup,
	.cleanup	= simone_mmc_spi_cleanup,
	.cs_control	= simone_mmc_spi_cs_control,
};

/*
 * MMC card detection GPIO setup.
 */

static int simone_mmc_spi_init(struct device *dev,
	irqreturn_t (*irq_handler)(int, void *), void *mmc)
{
	unsigned int gpio = MMC_CARD_DETECT_GPIO;
	int irq, err;

	err = gpio_request(gpio, dev_name(dev));
	if (err)
		return err;

	err = gpio_direction_input(gpio);
	if (err)
		goto fail;

	irq = gpio_to_irq(gpio);
	if (irq < 0)
		goto fail;

	err = request_irq(irq, irq_handler, IRQF_TRIGGER_FALLING,
			  "MMC card detect", mmc);
	if (err)
		goto fail;

	printk(KERN_INFO "%s: using irq %d for MMC card detection\n",
	       dev_name(dev), irq);

	return 0;
fail:
	gpio_free(gpio);
	return err;
}

static void simone_mmc_spi_exit(struct device *dev, void *mmc)
{
	unsigned int gpio = MMC_CARD_DETECT_GPIO;

	free_irq(gpio_to_irq(gpio), mmc);
	gpio_free(gpio);
}

static struct mmc_spi_platform_data simone_mmc_spi_data = {
	.init		= simone_mmc_spi_init,
	.exit		= simone_mmc_spi_exit,
	.detect_delay	= 500,
	.ocr_mask	= MMC_VDD_32_33 | MMC_VDD_33_34,
};

static struct spi_board_info simone_spi_devices[] __initdata = {
	{
		.modalias		= "mmc_spi",
		.controller_data	= &simone_mmc_spi_ops,
		.platform_data		= &simone_mmc_spi_data,
		/*
		 * We use 10 MHz even though the maximum is 3.7 MHz. The driver
		 * will limit it automatically to max. frequency.
		 */
		.max_speed_hz		= 10 * 1000 * 1000,
		.bus_num		= 0,
		.chip_select		= 0,
		.mode			= SPI_MODE_3,
	},
};

static struct ep93xx_spi_info simone_spi_info __initdata = {
	.num_chipselect	= ARRAY_SIZE(simone_spi_devices),
	.use_dma = 1,
};

static struct i2c_gpio_platform_data __initdata simone_i2c_gpio_data = {
	.sda_pin		= EP93XX_GPIO_LINE_EEDAT,
	.sda_is_open_drain	= 0,
	.scl_pin		= EP93XX_GPIO_LINE_EECLK,
	.scl_is_open_drain	= 0,
	.udelay			= 0,
	.timeout		= 0,
};

static struct i2c_board_info __initdata simone_i2c_board_info[] = {
	{
		I2C_BOARD_INFO("ds1337", 0x68),
	},
};

static struct platform_device simone_audio_device = {
	.name		= "simone-audio",
	.id		= -1,
};

static void __init simone_register_audio(void)
{
	ep93xx_register_ac97();
	platform_device_register(&simone_audio_device);
}

static void __init simone_init_machine(void)
{
	ep93xx_init_devices();
	ep93xx_register_flash(2, EP93XX_CS6_PHYS_BASE, SZ_8M);
	ep93xx_register_eth(&simone_eth_data, 1);
	ep93xx_register_fb(&simone_fb_info);
	ep93xx_register_i2c(&simone_i2c_gpio_data, simone_i2c_board_info,
			    ARRAY_SIZE(simone_i2c_board_info));
	ep93xx_register_spi(&simone_spi_info, simone_spi_devices,
			    ARRAY_SIZE(simone_spi_devices));
	simone_register_audio();
}

MACHINE_START(SIM_ONE, "Simplemachines Sim.One Board")
	/* Maintainer: Ryan Mallon */
	.atag_offset	= 0x100,
	.map_io		= ep93xx_map_io,
	.init_irq	= ep93xx_init_irq,
	.init_time	= ep93xx_timer_init,
	.init_machine	= simone_init_machine,
	.init_late	= ep93xx_init_late,
	.restart	= ep93xx_restart,
MACHINE_END
OpenPOWER on IntegriCloud