projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| da4e3302 PP |
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> | |
| da4e3302 PP |
23 | #include <linux/leds.h> |
| 24 | #include <linux/platform_device.h> | |
| 25 | #include <linux/gpio.h> | |
| 26 | #include <linux/input.h> | |
| 27 | #include <linux/gpio_keys.h> | |
| 28 | ||
| 29 | #include <asm/geode.h> | |
| 30 | ||
| 31 | #define BIOS_REGION_BASE 0xffff0000 | |
| 32 | #define BIOS_REGION_SIZE 0x00010000 | |
| 33 | ||
| 34 | static struct gpio_keys_button net5501_gpio_buttons[] = { | |
| 35 | { | |
| 36 | .code = KEY_RESTART, | |
| 37 | .gpio = 24, | |
| 38 | .active_low = 1, | |
| 39 | .desc = "Reset button", | |
| 40 | .type = EV_KEY, | |
| 41 | .wakeup = 0, | |
| 42 | .debounce_interval = 100, | |
| 43 | .can_disable = 0, | |
| 44 | } | |
| 45 | }; | |
| 46 | static struct gpio_keys_platform_data net5501_buttons_data = { | |
| 47 | .buttons = net5501_gpio_buttons, | |
| 48 | .nbuttons = ARRAY_SIZE(net5501_gpio_buttons), | |
| 49 | .poll_interval = 20, | |
| 50 | }; | |
| 51 | ||
| 52 | static struct platform_device net5501_buttons_dev = { | |
| 53 | .name = "gpio-keys-polled", | |
| 54 | .id = 1, | |
| 55 | .dev = { | |
| 56 | .platform_data = &net5501_buttons_data, | |
| 57 | } | |
| 58 | }; | |
| 59 | ||
| 60 | static struct gpio_led net5501_leds[] = { | |
| 61 | { | |
| 62 | .name = "net5501:1", | |
| 63 | .gpio = 6, | |
| 64 | .default_trigger = "default-on", | |
| d1d0589a | 65 | .active_low = 0, |
| da4e3302 PP |
66 | }, |
| 67 | }; | |
| 68 | ||
| 69 | static struct gpio_led_platform_data net5501_leds_data = { | |
| 70 | .num_leds = ARRAY_SIZE(net5501_leds), | |
| 71 | .leds = net5501_leds, | |
| 72 | }; | |
| 73 | ||
| 74 | static struct platform_device net5501_leds_dev = { | |
| 75 | .name = "leds-gpio", | |
| 76 | .id = -1, | |
| 77 | .dev.platform_data = &net5501_leds_data, | |
| 78 | }; | |
| 79 | ||
| a6d30e0f | 80 | static struct platform_device *net5501_devs[] __initdata = { |
| da4e3302 PP |
81 | &net5501_buttons_dev, |
| 82 | &net5501_leds_dev, | |
| 83 | }; | |
| 84 | ||
| 85 | static void __init register_net5501(void) | |
| 86 | { | |
| 87 | /* Setup LED control through leds-gpio driver */ | |
| 88 | platform_add_devices(net5501_devs, ARRAY_SIZE(net5501_devs)); | |
| 89 | } | |
| 90 | ||
| 91 | struct net5501_board { | |
| 92 | u16 offset; | |
| 93 | u16 len; | |
| 94 | char *sig; | |
| 95 | }; | |
| 96 | ||
| 97 | static struct net5501_board __initdata boards[] = { | |
| 98 | { 0xb7b, 7, "net5501" }, /* net5501 v1.33/1.33c */ | |
| 99 | { 0xb1f, 7, "net5501" }, /* net5501 v1.32i */ | |
| 100 | }; | |
| 101 | ||
| 102 | static bool __init net5501_present(void) | |
| 103 | { | |
| 104 | int i; | |
| 105 | unsigned char *rombase, *bios; | |
| 106 | bool found = false; | |
| 107 | ||
| 108 | rombase = ioremap(BIOS_REGION_BASE, BIOS_REGION_SIZE - 1); | |
| 109 | if (!rombase) { | |
| 110 | printk(KERN_ERR "%s: failed to get rombase\n", KBUILD_MODNAME); | |
| 111 | return found; | |
| 112 | } | |
| 113 | ||
| 114 | bios = rombase + 0x20; /* null terminated */ | |
| 115 | ||
| 116 | if (memcmp(bios, "comBIOS", 7)) | |
| 117 | goto unmap; | |
| 118 | ||
| 119 | for (i = 0; i < ARRAY_SIZE(boards); i++) { | |
| 120 | unsigned char *model = rombase + boards[i].offset; | |
| 121 | ||
| 122 | if (!memcmp(model, boards[i].sig, boards[i].len)) { | |
| 123 | printk(KERN_INFO "%s: system is recognized as \"%s\"\n", | |
| 124 | KBUILD_MODNAME, model); | |
| 125 | ||
| 126 | found = true; | |
| 127 | break; | |
| 128 | } | |
| 129 | } | |
| 130 | ||
| 131 | unmap: | |
| 132 | iounmap(rombase); | |
| 133 | return found; | |
| 134 | } | |
| 135 | ||
| 136 | static int __init net5501_init(void) | |
| 137 | { | |
| 138 | if (!is_geode()) | |
| 139 | return 0; | |
| 140 | ||
| 141 | if (!net5501_present()) | |
| 142 | return 0; | |
| 143 | ||
| 144 | register_net5501(); | |
| 145 | ||
| 146 | return 0; | |
| 147 | } | |
| 605a46ee | 148 | device_initcall(net5501_init); |