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 * MMC card detection GPIO setup.
53 */
54
simone_mmc_spi_init(struct device * dev,irqreturn_t (* irq_handler)(int,void *),void * mmc)55 static int simone_mmc_spi_init(struct device *dev,
56 irqreturn_t (*irq_handler)(int, void *), void *mmc)
57 {
58 unsigned int gpio = MMC_CARD_DETECT_GPIO;
59 int irq, err;
60
61 err = gpio_request(gpio, dev_name(dev));
62 if (err)
63 return err;
64
65 err = gpio_direction_input(gpio);
66 if (err)
67 goto fail;
68
69 irq = gpio_to_irq(gpio);
70 if (irq < 0)
71 goto fail;
72
73 err = request_irq(irq, irq_handler, IRQF_TRIGGER_FALLING,
74 "MMC card detect", mmc);
75 if (err)
76 goto fail;
77
78 printk(KERN_INFO "%s: using irq %d for MMC card detection\n",
79 dev_name(dev), irq);
80
81 return 0;
82 fail:
83 gpio_free(gpio);
84 return err;
85 }
86
simone_mmc_spi_exit(struct device * dev,void * mmc)87 static void simone_mmc_spi_exit(struct device *dev, void *mmc)
88 {
89 unsigned int gpio = MMC_CARD_DETECT_GPIO;
90
91 free_irq(gpio_to_irq(gpio), mmc);
92 gpio_free(gpio);
93 }
94
95 static struct mmc_spi_platform_data simone_mmc_spi_data = {
96 .init = simone_mmc_spi_init,
97 .exit = simone_mmc_spi_exit,
98 .detect_delay = 500,
99 .ocr_mask = MMC_VDD_32_33 | MMC_VDD_33_34,
100 };
101
102 static struct spi_board_info simone_spi_devices[] __initdata = {
103 {
104 .modalias = "mmc_spi",
105 .platform_data = &simone_mmc_spi_data,
106 /*
107 * We use 10 MHz even though the maximum is 3.7 MHz. The driver
108 * will limit it automatically to max. frequency.
109 */
110 .max_speed_hz = 10 * 1000 * 1000,
111 .bus_num = 0,
112 .chip_select = 0,
113 .mode = SPI_MODE_3,
114 },
115 };
116
117 /*
118 * Up to v1.3, the Sim.One used SFRMOUT as SD card chip select, but this goes
119 * low between multi-message command blocks. From v1.4, it uses a GPIO instead.
120 * v1.3 parts will still work, since the signal on SFRMOUT is automatic.
121 */
122 static int simone_spi_chipselects[] __initdata = {
123 EP93XX_GPIO_LINE_EGPIO1,
124 };
125
126 static struct ep93xx_spi_info simone_spi_info __initdata = {
127 .chipselect = simone_spi_chipselects,
128 .num_chipselect = ARRAY_SIZE(simone_spi_chipselects),
129 .use_dma = 1,
130 };
131
132 static struct i2c_gpio_platform_data __initdata simone_i2c_gpio_data = {
133 .sda_pin = EP93XX_GPIO_LINE_EEDAT,
134 .sda_is_open_drain = 0,
135 .scl_pin = EP93XX_GPIO_LINE_EECLK,
136 .scl_is_open_drain = 0,
137 .udelay = 0,
138 .timeout = 0,
139 };
140
141 static struct i2c_board_info __initdata simone_i2c_board_info[] = {
142 {
143 I2C_BOARD_INFO("ds1337", 0x68),
144 },
145 };
146
147 static struct platform_device simone_audio_device = {
148 .name = "simone-audio",
149 .id = -1,
150 };
151
simone_register_audio(void)152 static void __init simone_register_audio(void)
153 {
154 ep93xx_register_ac97();
155 platform_device_register(&simone_audio_device);
156 }
157
simone_init_machine(void)158 static void __init simone_init_machine(void)
159 {
160 ep93xx_init_devices();
161 ep93xx_register_flash(2, EP93XX_CS6_PHYS_BASE, SZ_8M);
162 ep93xx_register_eth(&simone_eth_data, 1);
163 ep93xx_register_fb(&simone_fb_info);
164 ep93xx_register_i2c(&simone_i2c_gpio_data, simone_i2c_board_info,
165 ARRAY_SIZE(simone_i2c_board_info));
166 ep93xx_register_spi(&simone_spi_info, simone_spi_devices,
167 ARRAY_SIZE(simone_spi_devices));
168 simone_register_audio();
169 }
170
171 MACHINE_START(SIM_ONE, "Simplemachines Sim.One Board")
172 /* Maintainer: Ryan Mallon */
173 .atag_offset = 0x100,
174 .map_io = ep93xx_map_io,
175 .init_irq = ep93xx_init_irq,
176 .init_time = ep93xx_timer_init,
177 .init_machine = simone_init_machine,
178 .init_late = ep93xx_init_late,
179 .restart = ep93xx_restart,
180 MACHINE_END
181