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1 | /* |
2 | * arch/arm/mach-ep93xx/simone.c | |
3 | * Simplemachines Sim.One support. | |
4 | * | |
1c5454ee | 5 | * Copyright (C) 2010 Ryan Mallon |
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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> | |
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21 | #include <linux/i2c.h> |
22 | #include <linux/i2c-gpio.h> | |
d50bfa47 MW |
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> | |
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29 | |
30 | #include <mach/hardware.h> | |
bd5f12a2 | 31 | #include <mach/gpio-ep93xx.h> |
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32 | |
33 | #include <asm/mach-types.h> | |
34 | #include <asm/mach/arch.h> | |
35 | ||
258249ec RM |
36 | #include "soc.h" |
37 | ||
b370e082 | 38 | static struct ep93xx_eth_data __initdata simone_eth_data = { |
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39 | .phy_id = 1, |
40 | }; | |
41 | ||
b370e082 | 42 | static struct ep93xxfb_mach_info __initdata simone_fb_info = { |
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43 | .flags = EP93XXFB_USE_SDCSN0 | EP93XXFB_PCLK_FALLING, |
44 | }; | |
45 | ||
d50bfa47 MW |
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 | ||
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 | ||
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 | ||
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 | ||
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 | ||
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), | |
109965a3 | 170 | .use_dma = 1, |
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171 | }; |
172 | ||
b370e082 | 173 | static struct i2c_gpio_platform_data __initdata simone_i2c_gpio_data = { |
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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 | ||
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188 | static struct platform_device simone_audio_device = { |
189 | .name = "simone-audio", | |
190 | .id = -1, | |
191 | }; | |
192 | ||
193 | static void __init simone_register_audio(void) | |
194 | { | |
195 | ep93xx_register_ac97(); | |
196 | platform_device_register(&simone_audio_device); | |
197 | } | |
198 | ||
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199 | static void __init simone_init_machine(void) |
200 | { | |
201 | ep93xx_init_devices(); | |
16bcf78f | 202 | ep93xx_register_flash(2, EP93XX_CS6_PHYS_BASE, SZ_8M); |
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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)); | |
d50bfa47 MW |
207 | ep93xx_register_spi(&simone_spi_info, simone_spi_devices, |
208 | ARRAY_SIZE(simone_spi_devices)); | |
e5063fe8 | 209 | simone_register_audio(); |
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210 | } |
211 | ||
212 | MACHINE_START(SIM_ONE, "Simplemachines Sim.One Board") | |
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213 | /* Maintainer: Ryan Mallon */ |
214 | .atag_offset = 0x100, | |
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215 | .map_io = ep93xx_map_io, |
216 | .init_irq = ep93xx_init_irq, | |
6bb27d73 | 217 | .init_time = ep93xx_timer_init, |
a3662f6b | 218 | .init_machine = simone_init_machine, |
c914283f | 219 | .init_late = ep93xx_init_late, |
3275166e | 220 | .restart = ep93xx_restart, |
a3662f6b | 221 | MACHINE_END |