Philip Prindeville | da4e330 | 2012-03-05 15:05:15 -0800 | [diff] [blame] | 1 | /* |
| 2 | * System Specific setup for Soekris net5501 |
| 3 | * At the moment this means setup of GPIO control of LEDs and buttons |
| 4 | * on net5501 boards. |
| 5 | * |
| 6 | * |
| 7 | * Copyright (C) 2008-2009 Tower Technologies |
| 8 | * Written by Alessandro Zummo <a.zummo@towertech.it> |
| 9 | * |
| 10 | * Copyright (C) 2008 Constantin Baranov <const@mimas.ru> |
| 11 | * Copyright (C) 2011 Ed Wildgoose <kernel@wildgooses.com> |
| 12 | * and Philip Prindeville <philipp@redfish-solutions.com> |
| 13 | * |
| 14 | * This program is free software; you can redistribute it and/or modify |
| 15 | * it under the terms of the GNU General Public License version 2 |
| 16 | * as published by the Free Software Foundation. |
| 17 | */ |
| 18 | |
| 19 | #include <linux/kernel.h> |
| 20 | #include <linux/init.h> |
| 21 | #include <linux/io.h> |
| 22 | #include <linux/string.h> |
| 23 | #include <linux/module.h> |
| 24 | #include <linux/leds.h> |
| 25 | #include <linux/platform_device.h> |
| 26 | #include <linux/gpio.h> |
| 27 | #include <linux/input.h> |
| 28 | #include <linux/gpio_keys.h> |
| 29 | |
| 30 | #include <asm/geode.h> |
| 31 | |
| 32 | #define BIOS_REGION_BASE 0xffff0000 |
| 33 | #define BIOS_REGION_SIZE 0x00010000 |
| 34 | |
| 35 | static struct gpio_keys_button net5501_gpio_buttons[] = { |
| 36 | { |
| 37 | .code = KEY_RESTART, |
| 38 | .gpio = 24, |
| 39 | .active_low = 1, |
| 40 | .desc = "Reset button", |
| 41 | .type = EV_KEY, |
| 42 | .wakeup = 0, |
| 43 | .debounce_interval = 100, |
| 44 | .can_disable = 0, |
| 45 | } |
| 46 | }; |
| 47 | static struct gpio_keys_platform_data net5501_buttons_data = { |
| 48 | .buttons = net5501_gpio_buttons, |
| 49 | .nbuttons = ARRAY_SIZE(net5501_gpio_buttons), |
| 50 | .poll_interval = 20, |
| 51 | }; |
| 52 | |
| 53 | static struct platform_device net5501_buttons_dev = { |
| 54 | .name = "gpio-keys-polled", |
| 55 | .id = 1, |
| 56 | .dev = { |
| 57 | .platform_data = &net5501_buttons_data, |
| 58 | } |
| 59 | }; |
| 60 | |
| 61 | static struct gpio_led net5501_leds[] = { |
| 62 | { |
| 63 | .name = "net5501:1", |
| 64 | .gpio = 6, |
| 65 | .default_trigger = "default-on", |
| 66 | .active_low = 1, |
| 67 | }, |
| 68 | }; |
| 69 | |
| 70 | static struct gpio_led_platform_data net5501_leds_data = { |
| 71 | .num_leds = ARRAY_SIZE(net5501_leds), |
| 72 | .leds = net5501_leds, |
| 73 | }; |
| 74 | |
| 75 | static struct platform_device net5501_leds_dev = { |
| 76 | .name = "leds-gpio", |
| 77 | .id = -1, |
| 78 | .dev.platform_data = &net5501_leds_data, |
| 79 | }; |
| 80 | |
| 81 | static struct __initdata platform_device *net5501_devs[] = { |
| 82 | &net5501_buttons_dev, |
| 83 | &net5501_leds_dev, |
| 84 | }; |
| 85 | |
| 86 | static void __init register_net5501(void) |
| 87 | { |
| 88 | /* Setup LED control through leds-gpio driver */ |
| 89 | platform_add_devices(net5501_devs, ARRAY_SIZE(net5501_devs)); |
| 90 | } |
| 91 | |
| 92 | struct net5501_board { |
| 93 | u16 offset; |
| 94 | u16 len; |
| 95 | char *sig; |
| 96 | }; |
| 97 | |
| 98 | static struct net5501_board __initdata boards[] = { |
| 99 | { 0xb7b, 7, "net5501" }, /* net5501 v1.33/1.33c */ |
| 100 | { 0xb1f, 7, "net5501" }, /* net5501 v1.32i */ |
| 101 | }; |
| 102 | |
| 103 | static bool __init net5501_present(void) |
| 104 | { |
| 105 | int i; |
| 106 | unsigned char *rombase, *bios; |
| 107 | bool found = false; |
| 108 | |
| 109 | rombase = ioremap(BIOS_REGION_BASE, BIOS_REGION_SIZE - 1); |
| 110 | if (!rombase) { |
| 111 | printk(KERN_ERR "%s: failed to get rombase\n", KBUILD_MODNAME); |
| 112 | return found; |
| 113 | } |
| 114 | |
| 115 | bios = rombase + 0x20; /* null terminated */ |
| 116 | |
| 117 | if (memcmp(bios, "comBIOS", 7)) |
| 118 | goto unmap; |
| 119 | |
| 120 | for (i = 0; i < ARRAY_SIZE(boards); i++) { |
| 121 | unsigned char *model = rombase + boards[i].offset; |
| 122 | |
| 123 | if (!memcmp(model, boards[i].sig, boards[i].len)) { |
| 124 | printk(KERN_INFO "%s: system is recognized as \"%s\"\n", |
| 125 | KBUILD_MODNAME, model); |
| 126 | |
| 127 | found = true; |
| 128 | break; |
| 129 | } |
| 130 | } |
| 131 | |
| 132 | unmap: |
| 133 | iounmap(rombase); |
| 134 | return found; |
| 135 | } |
| 136 | |
| 137 | static int __init net5501_init(void) |
| 138 | { |
| 139 | if (!is_geode()) |
| 140 | return 0; |
| 141 | |
| 142 | if (!net5501_present()) |
| 143 | return 0; |
| 144 | |
| 145 | register_net5501(); |
| 146 | |
| 147 | return 0; |
| 148 | } |
| 149 | |
| 150 | module_init(net5501_init); |
| 151 | |
| 152 | MODULE_AUTHOR("Philip Prindeville <philipp@redfish-solutions.com>"); |
| 153 | MODULE_DESCRIPTION("Soekris net5501 System Setup"); |
| 154 | MODULE_LICENSE("GPL"); |