projects / linux-2.6-block.git / blame
| Commit | Line | Data |
|---|---|---|
| ee027e4a YW |
1 | /* |
| 2 | * Eee PC WMI hotkey driver | |
| 3 | * | |
| 4 | * Copyright(C) 2010 Intel Corporation. | |
| 5 | * | |
| 6 | * Portions based on wistron_btns.c: | |
| 7 | * Copyright (C) 2005 Miloslav Trmac <mitr@volny.cz> | |
| 8 | * Copyright (C) 2005 Bernhard Rosenkraenzer <bero@arklinux.org> | |
| 9 | * Copyright (C) 2005 Dmitry Torokhov <dtor@mail.ru> | |
| 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 | |
| 14 | * (at your option) any later version. | |
| 15 | * | |
| 16 | * This program is distributed in the hope that it will be useful, | |
| 17 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 18 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
| 19 | * GNU General Public License for more details. | |
| 20 | * | |
| 21 | * You should have received a copy of the GNU General Public License | |
| 22 | * along with this program; if not, write to the Free Software | |
| 23 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
| 24 | */ | |
| 25 | ||
| 26 | #include <linux/kernel.h> | |
| 27 | #include <linux/module.h> | |
| 28 | #include <linux/init.h> | |
| 29 | #include <linux/types.h> | |
| a32f3926 | 30 | #include <linux/slab.h> |
| ee027e4a YW |
31 | #include <linux/input.h> |
| 32 | #include <linux/input/sparse-keymap.h> | |
| 33 | #include <acpi/acpi_bus.h> | |
| 34 | #include <acpi/acpi_drivers.h> | |
| 35 | ||
| 36 | MODULE_AUTHOR("Yong Wang <yong.y.wang@intel.com>"); | |
| 37 | MODULE_DESCRIPTION("Eee PC WMI Hotkey Driver"); | |
| 38 | MODULE_LICENSE("GPL"); | |
| 39 | ||
| 40 | #define EEEPC_WMI_EVENT_GUID "ABBC0F72-8EA1-11D1-00A0-C90629100000" | |
| 41 | ||
| 42 | MODULE_ALIAS("wmi:"EEEPC_WMI_EVENT_GUID); | |
| 43 | ||
| 44 | #define NOTIFY_BRNUP_MIN 0x11 | |
| 45 | #define NOTIFY_BRNUP_MAX 0x1f | |
| 46 | #define NOTIFY_BRNDOWN_MIN 0x20 | |
| 47 | #define NOTIFY_BRNDOWN_MAX 0x2e | |
| 48 | ||
| 49 | static const struct key_entry eeepc_wmi_keymap[] = { | |
| 50 | /* Sleep already handled via generic ACPI code */ | |
| 51 | { KE_KEY, 0x5d, { KEY_WLAN } }, | |
| 52 | { KE_KEY, 0x32, { KEY_MUTE } }, | |
| 53 | { KE_KEY, 0x31, { KEY_VOLUMEDOWN } }, | |
| 54 | { KE_KEY, 0x30, { KEY_VOLUMEUP } }, | |
| 55 | { KE_IGNORE, NOTIFY_BRNDOWN_MIN, { KEY_BRIGHTNESSDOWN } }, | |
| 56 | { KE_IGNORE, NOTIFY_BRNUP_MIN, { KEY_BRIGHTNESSUP } }, | |
| 57 | { KE_KEY, 0xcc, { KEY_SWITCHVIDEOMODE } }, | |
| 58 | { KE_END, 0}, | |
| 59 | }; | |
| 60 | ||
| 61 | static struct input_dev *eeepc_wmi_input_dev; | |
| 62 | ||
| 63 | static void eeepc_wmi_notify(u32 value, void *context) | |
| 64 | { | |
| 65 | struct acpi_buffer response = { ACPI_ALLOCATE_BUFFER, NULL }; | |
| 66 | union acpi_object *obj; | |
| 67 | acpi_status status; | |
| 68 | int code; | |
| 69 | ||
| 70 | status = wmi_get_event_data(value, &response); | |
| 71 | if (status != AE_OK) { | |
| 72 | pr_err("EEEPC WMI: bad event status 0x%x\n", status); | |
| 73 | return; | |
| 74 | } | |
| 75 | ||
| 76 | obj = (union acpi_object *)response.pointer; | |
| 77 | ||
| 78 | if (obj && obj->type == ACPI_TYPE_INTEGER) { | |
| 79 | code = obj->integer.value; | |
| 80 | ||
| 81 | if (code >= NOTIFY_BRNUP_MIN && code <= NOTIFY_BRNUP_MAX) | |
| 82 | code = NOTIFY_BRNUP_MIN; | |
| 83 | else if (code >= NOTIFY_BRNDOWN_MIN && code <= NOTIFY_BRNDOWN_MAX) | |
| 84 | code = NOTIFY_BRNDOWN_MIN; | |
| 85 | ||
| 86 | if (!sparse_keymap_report_event(eeepc_wmi_input_dev, | |
| 87 | code, 1, true)) | |
| 88 | pr_info("EEEPC WMI: Unknown key %x pressed\n", code); | |
| 89 | } | |
| 90 | ||
| 91 | kfree(obj); | |
| 92 | } | |
| 93 | ||
| 94 | static int eeepc_wmi_input_setup(void) | |
| 95 | { | |
| 96 | int err; | |
| 97 | ||
| 98 | eeepc_wmi_input_dev = input_allocate_device(); | |
| 99 | if (!eeepc_wmi_input_dev) | |
| 100 | return -ENOMEM; | |
| 101 | ||
| 102 | eeepc_wmi_input_dev->name = "Eee PC WMI hotkeys"; | |
| 103 | eeepc_wmi_input_dev->phys = "wmi/input0"; | |
| 104 | eeepc_wmi_input_dev->id.bustype = BUS_HOST; | |
| 105 | ||
| 106 | err = sparse_keymap_setup(eeepc_wmi_input_dev, eeepc_wmi_keymap, NULL); | |
| 107 | if (err) | |
| 108 | goto err_free_dev; | |
| 109 | ||
| 110 | err = input_register_device(eeepc_wmi_input_dev); | |
| 111 | if (err) | |
| 112 | goto err_free_keymap; | |
| 113 | ||
| 114 | return 0; | |
| 115 | ||
| 116 | err_free_keymap: | |
| 117 | sparse_keymap_free(eeepc_wmi_input_dev); | |
| 118 | err_free_dev: | |
| 119 | input_free_device(eeepc_wmi_input_dev); | |
| 120 | return err; | |
| 121 | } | |
| 122 | ||
| 123 | static int __init eeepc_wmi_init(void) | |
| 124 | { | |
| 125 | int err; | |
| 126 | acpi_status status; | |
| 127 | ||
| 128 | if (!wmi_has_guid(EEEPC_WMI_EVENT_GUID)) { | |
| 129 | pr_warning("EEEPC WMI: No known WMI GUID found\n"); | |
| 130 | return -ENODEV; | |
| 131 | } | |
| 132 | ||
| 133 | err = eeepc_wmi_input_setup(); | |
| 134 | if (err) | |
| 135 | return err; | |
| 136 | ||
| 137 | status = wmi_install_notify_handler(EEEPC_WMI_EVENT_GUID, | |
| 138 | eeepc_wmi_notify, NULL); | |
| 139 | if (ACPI_FAILURE(status)) { | |
| 140 | sparse_keymap_free(eeepc_wmi_input_dev); | |
| 141 | input_unregister_device(eeepc_wmi_input_dev); | |
| 142 | pr_err("EEEPC WMI: Unable to register notify handler - %d\n", | |
| 143 | status); | |
| 144 | return -ENODEV; | |
| 145 | } | |
| 146 | ||
| 147 | return 0; | |
| 148 | } | |
| 149 | ||
| 150 | static void __exit eeepc_wmi_exit(void) | |
| 151 | { | |
| 152 | wmi_remove_notify_handler(EEEPC_WMI_EVENT_GUID); | |
| 153 | sparse_keymap_free(eeepc_wmi_input_dev); | |
| 154 | input_unregister_device(eeepc_wmi_input_dev); | |
| 155 | } | |
| 156 | ||
| 157 | module_init(eeepc_wmi_init); | |
| 158 | module_exit(eeepc_wmi_exit); |