1/*
2 * arch/arm/mach-ep93xx/simone.c
3 * Simplemachines Sim.One support.
4 *
5 * Copyright (C) 2010 Ryan Mallon
6 *
7 * Based on the 2.6.24.7 support:
8 *   Copyright (C) 2009 Simplemachines
9 *   MMC support by Peter Ivanov <ivanovp@gmail.com>, 2007
10 *
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License as published by
13 * the Free Software Foundation; either version 2 of the License, or (at
14 * your option) any later version.
15 *
16 */
17
18#include <linux/kernel.h>
19#include <linux/init.h>
20#include <linux/platform_device.h>
21#include <linux/i2c.h>
22#include <linux/i2c-gpio.h>
23#include <linux/mmc/host.h>
24#include <linux/spi/spi.h>
25#include <linux/spi/mmc_spi.h>
26#include <linux/platform_data/video-ep93xx.h>
27#include <linux/platform_data/spi-ep93xx.h>
28#include <linux/gpio.h>
29
30#include <mach/hardware.h>
31#include <mach/gpio-ep93xx.h>
32
33#include <asm/mach-types.h>
34#include <asm/mach/arch.h>
35
36#include "soc.h"
37
38static struct ep93xx_eth_data __initdata simone_eth_data = {
39	.phy_id		= 1,
40};
41
42static struct ep93xxfb_mach_info __initdata simone_fb_info = {
43	.flags		= EP93XXFB_USE_SDCSN0 | EP93XXFB_PCLK_FALLING,
44};
45
46/*
47 * GPIO lines used for MMC card detection.
48 */
49#define MMC_CARD_DETECT_GPIO EP93XX_GPIO_LINE_EGPIO0
50
51/*
52 * Up to v1.3, the Sim.One used SFRMOUT as SD card chip select, but this goes
53 * low between multi-message command blocks. From v1.4, it uses a GPIO instead.
54 * v1.3 parts will still work, since the signal on SFRMOUT is automatic.
55 */
56#define MMC_CHIP_SELECT_GPIO EP93XX_GPIO_LINE_EGPIO1
57
58/*
59 * MMC SPI chip select GPIO handling. If you are using SFRMOUT (SFRM1) signal,
60 * you can leave these empty and pass NULL as .controller_data.
61 */
62
63static int simone_mmc_spi_setup(struct spi_device *spi)
64{
65	unsigned int gpio = MMC_CHIP_SELECT_GPIO;
66	int err;
67
68	err = gpio_request(gpio, spi->modalias);
69	if (err)
70		return err;
71
72	err = gpio_direction_output(gpio, 1);
73	if (err) {
74		gpio_free(gpio);
75		return err;
76	}
77
78	return 0;
79}
80
81static void simone_mmc_spi_cleanup(struct spi_device *spi)
82{
83	unsigned int gpio = MMC_CHIP_SELECT_GPIO;
84
85	gpio_set_value(gpio, 1);
86	gpio_direction_input(gpio);
87	gpio_free(gpio);
88}
89
90static void simone_mmc_spi_cs_control(struct spi_device *spi, int value)
91{
92	gpio_set_value(MMC_CHIP_SELECT_GPIO, value);
93}
94
95static struct ep93xx_spi_chip_ops simone_mmc_spi_ops = {
96	.setup		= simone_mmc_spi_setup,
97	.cleanup	= simone_mmc_spi_cleanup,
98	.cs_control	= simone_mmc_spi_cs_control,
99};
100
101/*
102 * MMC card detection GPIO setup.
103 */
104
105static int simone_mmc_spi_init(struct device *dev,
106	irqreturn_t (*irq_handler)(int, void *), void *mmc)
107{
108	unsigned int gpio = MMC_CARD_DETECT_GPIO;
109	int irq, err;
110
111	err = gpio_request(gpio, dev_name(dev));
112	if (err)
113		return err;
114
115	err = gpio_direction_input(gpio);
116	if (err)
117		goto fail;
118
119	irq = gpio_to_irq(gpio);
120	if (irq < 0)
121		goto fail;
122
123	err = request_irq(irq, irq_handler, IRQF_TRIGGER_FALLING,
124			  "MMC card detect", mmc);
125	if (err)
126		goto fail;
127
128	printk(KERN_INFO "%s: using irq %d for MMC card detection\n",
129	       dev_name(dev), irq);
130
131	return 0;
132fail:
133	gpio_free(gpio);
134	return err;
135}
136
137static void simone_mmc_spi_exit(struct device *dev, void *mmc)
138{
139	unsigned int gpio = MMC_CARD_DETECT_GPIO;
140
141	free_irq(gpio_to_irq(gpio), mmc);
142	gpio_free(gpio);
143}
144
145static struct mmc_spi_platform_data simone_mmc_spi_data = {
146	.init		= simone_mmc_spi_init,
147	.exit		= simone_mmc_spi_exit,
148	.detect_delay	= 500,
149	.ocr_mask	= MMC_VDD_32_33 | MMC_VDD_33_34,
150};
151
152static struct spi_board_info simone_spi_devices[] __initdata = {
153	{
154		.modalias		= "mmc_spi",
155		.controller_data	= &simone_mmc_spi_ops,
156		.platform_data		= &simone_mmc_spi_data,
157		/*
158		 * We use 10 MHz even though the maximum is 3.7 MHz. The driver
159		 * will limit it automatically to max. frequency.
160		 */
161		.max_speed_hz		= 10 * 1000 * 1000,
162		.bus_num		= 0,
163		.chip_select		= 0,
164		.mode			= SPI_MODE_3,
165	},
166};
167
168static struct ep93xx_spi_info simone_spi_info __initdata = {
169	.num_chipselect	= ARRAY_SIZE(simone_spi_devices),
170	.use_dma = 1,
171};
172
173static struct i2c_gpio_platform_data __initdata simone_i2c_gpio_data = {
174	.sda_pin		= EP93XX_GPIO_LINE_EEDAT,
175	.sda_is_open_drain	= 0,
176	.scl_pin		= EP93XX_GPIO_LINE_EECLK,
177	.scl_is_open_drain	= 0,
178	.udelay			= 0,
179	.timeout		= 0,
180};
181
182static struct i2c_board_info __initdata simone_i2c_board_info[] = {
183	{
184		I2C_BOARD_INFO("ds1337", 0x68),
185	},
186};
187
188static struct platform_device simone_audio_device = {
189	.name		= "simone-audio",
190	.id		= -1,
191};
192
193static void __init simone_register_audio(void)
194{
195	ep93xx_register_ac97();
196	platform_device_register(&simone_audio_device);
197}
198
199static void __init simone_init_machine(void)
200{
201	ep93xx_init_devices();
202	ep93xx_register_flash(2, EP93XX_CS6_PHYS_BASE, SZ_8M);
203	ep93xx_register_eth(&simone_eth_data, 1);
204	ep93xx_register_fb(&simone_fb_info);
205	ep93xx_register_i2c(&simone_i2c_gpio_data, simone_i2c_board_info,
206			    ARRAY_SIZE(simone_i2c_board_info));
207	ep93xx_register_spi(&simone_spi_info, simone_spi_devices,
208			    ARRAY_SIZE(simone_spi_devices));
209	simone_register_audio();
210}
211
212MACHINE_START(SIM_ONE, "Simplemachines Sim.One Board")
213	/* Maintainer: Ryan Mallon */
214	.atag_offset	= 0x100,
215	.map_io		= ep93xx_map_io,
216	.init_irq	= ep93xx_init_irq,
217	.init_time	= ep93xx_timer_init,
218	.init_machine	= simone_init_machine,
219	.init_late	= ep93xx_init_late,
220	.restart	= ep93xx_restart,
221MACHINE_END
222