a32f392663
eeepc-wmi uses kfree() but doesn't include slab.h. Include it. Signed-off-by: Tejun Heo <tj@kernel.org> Cc: Yong Wang <yong.y.wang@intel.com>
159 lines
4.2 KiB
C
159 lines
4.2 KiB
C
/*
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* Eee PC WMI hotkey driver
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*
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* Copyright(C) 2010 Intel Corporation.
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*
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* Portions based on wistron_btns.c:
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* Copyright (C) 2005 Miloslav Trmac <mitr@volny.cz>
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* Copyright (C) 2005 Bernhard Rosenkraenzer <bero@arklinux.org>
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* Copyright (C) 2005 Dmitry Torokhov <dtor@mail.ru>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/types.h>
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#include <linux/slab.h>
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#include <linux/input.h>
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#include <linux/input/sparse-keymap.h>
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#include <acpi/acpi_bus.h>
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#include <acpi/acpi_drivers.h>
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MODULE_AUTHOR("Yong Wang <yong.y.wang@intel.com>");
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MODULE_DESCRIPTION("Eee PC WMI Hotkey Driver");
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MODULE_LICENSE("GPL");
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#define EEEPC_WMI_EVENT_GUID "ABBC0F72-8EA1-11D1-00A0-C90629100000"
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MODULE_ALIAS("wmi:"EEEPC_WMI_EVENT_GUID);
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#define NOTIFY_BRNUP_MIN 0x11
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#define NOTIFY_BRNUP_MAX 0x1f
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#define NOTIFY_BRNDOWN_MIN 0x20
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#define NOTIFY_BRNDOWN_MAX 0x2e
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static const struct key_entry eeepc_wmi_keymap[] = {
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/* Sleep already handled via generic ACPI code */
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{ KE_KEY, 0x5d, { KEY_WLAN } },
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{ KE_KEY, 0x32, { KEY_MUTE } },
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{ KE_KEY, 0x31, { KEY_VOLUMEDOWN } },
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{ KE_KEY, 0x30, { KEY_VOLUMEUP } },
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{ KE_IGNORE, NOTIFY_BRNDOWN_MIN, { KEY_BRIGHTNESSDOWN } },
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{ KE_IGNORE, NOTIFY_BRNUP_MIN, { KEY_BRIGHTNESSUP } },
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{ KE_KEY, 0xcc, { KEY_SWITCHVIDEOMODE } },
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{ KE_END, 0},
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};
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static struct input_dev *eeepc_wmi_input_dev;
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static void eeepc_wmi_notify(u32 value, void *context)
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{
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struct acpi_buffer response = { ACPI_ALLOCATE_BUFFER, NULL };
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union acpi_object *obj;
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acpi_status status;
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int code;
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status = wmi_get_event_data(value, &response);
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if (status != AE_OK) {
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pr_err("EEEPC WMI: bad event status 0x%x\n", status);
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return;
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}
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obj = (union acpi_object *)response.pointer;
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if (obj && obj->type == ACPI_TYPE_INTEGER) {
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code = obj->integer.value;
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if (code >= NOTIFY_BRNUP_MIN && code <= NOTIFY_BRNUP_MAX)
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code = NOTIFY_BRNUP_MIN;
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else if (code >= NOTIFY_BRNDOWN_MIN && code <= NOTIFY_BRNDOWN_MAX)
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code = NOTIFY_BRNDOWN_MIN;
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if (!sparse_keymap_report_event(eeepc_wmi_input_dev,
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code, 1, true))
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pr_info("EEEPC WMI: Unknown key %x pressed\n", code);
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}
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kfree(obj);
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}
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static int eeepc_wmi_input_setup(void)
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{
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int err;
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eeepc_wmi_input_dev = input_allocate_device();
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if (!eeepc_wmi_input_dev)
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return -ENOMEM;
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eeepc_wmi_input_dev->name = "Eee PC WMI hotkeys";
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eeepc_wmi_input_dev->phys = "wmi/input0";
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eeepc_wmi_input_dev->id.bustype = BUS_HOST;
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err = sparse_keymap_setup(eeepc_wmi_input_dev, eeepc_wmi_keymap, NULL);
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if (err)
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goto err_free_dev;
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err = input_register_device(eeepc_wmi_input_dev);
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if (err)
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goto err_free_keymap;
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return 0;
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err_free_keymap:
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sparse_keymap_free(eeepc_wmi_input_dev);
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err_free_dev:
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input_free_device(eeepc_wmi_input_dev);
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return err;
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}
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static int __init eeepc_wmi_init(void)
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{
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int err;
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acpi_status status;
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if (!wmi_has_guid(EEEPC_WMI_EVENT_GUID)) {
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pr_warning("EEEPC WMI: No known WMI GUID found\n");
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return -ENODEV;
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}
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err = eeepc_wmi_input_setup();
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if (err)
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return err;
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status = wmi_install_notify_handler(EEEPC_WMI_EVENT_GUID,
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eeepc_wmi_notify, NULL);
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if (ACPI_FAILURE(status)) {
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sparse_keymap_free(eeepc_wmi_input_dev);
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input_unregister_device(eeepc_wmi_input_dev);
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pr_err("EEEPC WMI: Unable to register notify handler - %d\n",
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status);
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return -ENODEV;
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}
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return 0;
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}
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static void __exit eeepc_wmi_exit(void)
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{
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wmi_remove_notify_handler(EEEPC_WMI_EVENT_GUID);
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sparse_keymap_free(eeepc_wmi_input_dev);
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input_unregister_device(eeepc_wmi_input_dev);
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}
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module_init(eeepc_wmi_init);
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module_exit(eeepc_wmi_exit);
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