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
38 static struct ep93xx_eth_data __initdata simone_eth_data = {
39 .phy_id = 1,
40 };
41
42 static 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
simone_mmc_spi_setup(struct spi_device * spi)63 static 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
simone_mmc_spi_cleanup(struct spi_device * spi)81 static 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
simone_mmc_spi_cs_control(struct spi_device * spi,int value)90 static void simone_mmc_spi_cs_control(struct spi_device *spi, int value)
91 {
92 gpio_set_value(MMC_CHIP_SELECT_GPIO, value);
93 }
94
95 static 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
simone_mmc_spi_init(struct device * dev,irqreturn_t (* irq_handler)(int,void *),void * mmc)105 static 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;
132 fail:
133 gpio_free(gpio);
134 return err;
135 }
136
simone_mmc_spi_exit(struct device * dev,void * mmc)137 static 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
145 static 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
152 static 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
168 static struct ep93xx_spi_info simone_spi_info __initdata = {
169 .num_chipselect = ARRAY_SIZE(simone_spi_devices),
170 .use_dma = 1,
171 };
172
173 static 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
182 static struct i2c_board_info __initdata simone_i2c_board_info[] = {
183 {
184 I2C_BOARD_INFO("ds1337", 0x68),
185 },
186 };
187
188 static struct platform_device simone_audio_device = {
189 .name = "simone-audio",
190 .id = -1,
191 };
192
simone_register_audio(void)193 static void __init simone_register_audio(void)
194 {
195 ep93xx_register_ac97();
196 platform_device_register(&simone_audio_device);
197 }
198
simone_init_machine(void)199 static 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
212 MACHINE_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,
221 MACHINE_END
222