1 /*
2 * Atheros PB44 reference board support
3 *
4 * Copyright (C) 2009-2010 Gabor Juhos <juhosg@openwrt.org>
5 *
6 * This program is free software; you can redistribute it and/or modify it
7 * under the terms of the GNU General Public License version 2 as published
8 * by the Free Software Foundation.
9 */
10
11 #include <linux/init.h>
12 #include <linux/platform_device.h>
13 #include <linux/i2c.h>
14 #include <linux/gpio/machine.h>
15 #include <linux/platform_data/pcf857x.h>
16
17 #include "machtypes.h"
18 #include "dev-gpio-buttons.h"
19 #include "dev-leds-gpio.h"
20 #include "dev-spi.h"
21 #include "dev-usb.h"
22 #include "pci.h"
23
24 #define PB44_GPIO_I2C_SCL 0
25 #define PB44_GPIO_I2C_SDA 1
26
27 #define PB44_GPIO_EXP_BASE 16
28 #define PB44_GPIO_SW_RESET (PB44_GPIO_EXP_BASE + 6)
29 #define PB44_GPIO_SW_JUMP (PB44_GPIO_EXP_BASE + 8)
30 #define PB44_GPIO_LED_JUMP1 (PB44_GPIO_EXP_BASE + 9)
31 #define PB44_GPIO_LED_JUMP2 (PB44_GPIO_EXP_BASE + 10)
32
33 #define PB44_KEYS_POLL_INTERVAL 20 /* msecs */
34 #define PB44_KEYS_DEBOUNCE_INTERVAL (3 * PB44_KEYS_POLL_INTERVAL)
35
36 static struct gpiod_lookup_table pb44_i2c_gpiod_table = {
37 .dev_id = "i2c-gpio.0",
38 .table = {
39 GPIO_LOOKUP_IDX("ath79-gpio", PB44_GPIO_I2C_SDA,
40 NULL, 0, GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN),
41 GPIO_LOOKUP_IDX("ath79-gpio", PB44_GPIO_I2C_SCL,
42 NULL, 1, GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN),
43 },
44 };
45
46 static struct platform_device pb44_i2c_gpio_device = {
47 .name = "i2c-gpio",
48 .id = 0,
49 .dev = {
50 .platform_data = NULL,
51 }
52 };
53
54 static struct pcf857x_platform_data pb44_pcf857x_data = {
55 .gpio_base = PB44_GPIO_EXP_BASE,
56 };
57
58 static struct i2c_board_info pb44_i2c_board_info[] __initdata = {
59 {
60 I2C_BOARD_INFO("pcf8575", 0x20),
61 .platform_data = &pb44_pcf857x_data,
62 },
63 };
64
65 static struct gpio_led pb44_leds_gpio[] __initdata = {
66 {
67 .name = "pb44:amber:jump1",
68 .gpio = PB44_GPIO_LED_JUMP1,
69 .active_low = 1,
70 }, {
71 .name = "pb44:green:jump2",
72 .gpio = PB44_GPIO_LED_JUMP2,
73 .active_low = 1,
74 },
75 };
76
77 static struct gpio_keys_button pb44_gpio_keys[] __initdata = {
78 {
79 .desc = "soft_reset",
80 .type = EV_KEY,
81 .code = KEY_RESTART,
82 .debounce_interval = PB44_KEYS_DEBOUNCE_INTERVAL,
83 .gpio = PB44_GPIO_SW_RESET,
84 .active_low = 1,
85 } , {
86 .desc = "jumpstart",
87 .type = EV_KEY,
88 .code = KEY_WPS_BUTTON,
89 .debounce_interval = PB44_KEYS_DEBOUNCE_INTERVAL,
90 .gpio = PB44_GPIO_SW_JUMP,
91 .active_low = 1,
92 }
93 };
94
95 static struct spi_board_info pb44_spi_info[] = {
96 {
97 .bus_num = 0,
98 .chip_select = 0,
99 .max_speed_hz = 25000000,
100 .modalias = "m25p64",
101 },
102 };
103
104 static struct ath79_spi_platform_data pb44_spi_data = {
105 .bus_num = 0,
106 .num_chipselect = 1,
107 };
108
pb44_init(void)109 static void __init pb44_init(void)
110 {
111 gpiod_add_lookup_table(&pb44_i2c_gpiod_table);
112 i2c_register_board_info(0, pb44_i2c_board_info,
113 ARRAY_SIZE(pb44_i2c_board_info));
114 platform_device_register(&pb44_i2c_gpio_device);
115
116 ath79_register_leds_gpio(-1, ARRAY_SIZE(pb44_leds_gpio),
117 pb44_leds_gpio);
118 ath79_register_gpio_keys_polled(-1, PB44_KEYS_POLL_INTERVAL,
119 ARRAY_SIZE(pb44_gpio_keys),
120 pb44_gpio_keys);
121 ath79_register_spi(&pb44_spi_data, pb44_spi_info,
122 ARRAY_SIZE(pb44_spi_info));
123 ath79_register_usb();
124 ath79_register_pci();
125 }
126
127 MIPS_MACHINE(ATH79_MACH_PB44, "PB44", "Atheros PB44 reference board",
128 pb44_init);
129