![Dmitry Torokhov](/assets/img/avatar_default.png)
Instead of implementing its own version of keymap hanlding switch over to using sparse keymap library. Also make sure that we install notify handler only after we allocated input device and that we remove notify handler before unregistering input device. Signed-off-by: Dmitry Torokhov <dtor@mail.ru> Signed-off-by: Matthew Garrett <mjg@redhat.com>
694 lines
17 KiB
C
694 lines
17 KiB
C
/*
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* HP WMI hotkeys
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*
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* Copyright (C) 2008 Red Hat <mjg@redhat.com>
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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/slab.h>
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#include <linux/types.h>
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#include <linux/input.h>
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#include <linux/input/sparse-keymap.h>
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#include <linux/platform_device.h>
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#include <linux/acpi.h>
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#include <linux/rfkill.h>
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#include <linux/string.h>
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MODULE_AUTHOR("Matthew Garrett <mjg59@srcf.ucam.org>");
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MODULE_DESCRIPTION("HP laptop WMI hotkeys driver");
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MODULE_LICENSE("GPL");
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MODULE_ALIAS("wmi:95F24279-4D7B-4334-9387-ACCDC67EF61C");
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MODULE_ALIAS("wmi:5FB7F034-2C63-45e9-BE91-3D44E2C707E4");
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#define HPWMI_EVENT_GUID "95F24279-4D7B-4334-9387-ACCDC67EF61C"
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#define HPWMI_BIOS_GUID "5FB7F034-2C63-45e9-BE91-3D44E2C707E4"
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#define HPWMI_DISPLAY_QUERY 0x1
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#define HPWMI_HDDTEMP_QUERY 0x2
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#define HPWMI_ALS_QUERY 0x3
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#define HPWMI_HARDWARE_QUERY 0x4
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#define HPWMI_WIRELESS_QUERY 0x5
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#define HPWMI_HOTKEY_QUERY 0xc
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#define PREFIX "HP WMI: "
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#define UNIMP "Unimplemented "
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enum hp_wmi_radio {
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HPWMI_WIFI = 0,
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HPWMI_BLUETOOTH = 1,
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HPWMI_WWAN = 2,
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};
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enum hp_wmi_event_ids {
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HPWMI_DOCK_EVENT = 1,
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HPWMI_PARK_HDD = 2,
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HPWMI_SMART_ADAPTER = 3,
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HPWMI_BEZEL_BUTTON = 4,
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HPWMI_WIRELESS = 5,
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HPWMI_CPU_BATTERY_THROTTLE = 6,
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HPWMI_LOCK_SWITCH = 7,
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};
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static int __devinit hp_wmi_bios_setup(struct platform_device *device);
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static int __exit hp_wmi_bios_remove(struct platform_device *device);
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static int hp_wmi_resume_handler(struct device *device);
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struct bios_args {
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u32 signature;
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u32 command;
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u32 commandtype;
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u32 datasize;
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u32 data;
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};
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struct bios_return {
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u32 sigpass;
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u32 return_code;
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u32 value;
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};
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static const struct key_entry hp_wmi_keymap[] = {
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{ KE_KEY, 0x02, { KEY_BRIGHTNESSUP } },
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{ KE_KEY, 0x03, { KEY_BRIGHTNESSDOWN } },
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{ KE_KEY, 0x20e6, { KEY_PROG1 } },
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{ KE_KEY, 0x20e8, { KEY_MEDIA } },
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{ KE_KEY, 0x2142, { KEY_MEDIA } },
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{ KE_KEY, 0x213b, { KEY_INFO } },
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{ KE_KEY, 0x2169, { KEY_DIRECTION } },
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{ KE_KEY, 0x231b, { KEY_HELP } },
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{ KE_END, 0 }
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};
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static struct input_dev *hp_wmi_input_dev;
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static struct platform_device *hp_wmi_platform_dev;
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static struct rfkill *wifi_rfkill;
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static struct rfkill *bluetooth_rfkill;
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static struct rfkill *wwan_rfkill;
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static const struct dev_pm_ops hp_wmi_pm_ops = {
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.resume = hp_wmi_resume_handler,
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.restore = hp_wmi_resume_handler,
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};
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static struct platform_driver hp_wmi_driver = {
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.driver = {
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.name = "hp-wmi",
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.owner = THIS_MODULE,
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.pm = &hp_wmi_pm_ops,
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},
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.probe = hp_wmi_bios_setup,
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.remove = hp_wmi_bios_remove,
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};
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/*
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* hp_wmi_perform_query
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*
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* query: The commandtype -> What should be queried
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* write: The command -> 0 read, 1 write, 3 ODM specific
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* buffer: Buffer used as input and/or output
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* buffersize: Size of buffer
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*
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* returns zero on success
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* an HP WMI query specific error code (which is positive)
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* -EINVAL if the query was not successful at all
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* -EINVAL if the output buffer size exceeds buffersize
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*
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* Note: The buffersize must at least be the maximum of the input and output
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* size. E.g. Battery info query (0x7) is defined to have 1 byte input
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* and 128 byte output. The caller would do:
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* buffer = kzalloc(128, GFP_KERNEL);
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* ret = hp_wmi_perform_query(0x7, 0, buffer, 128)
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*/
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static int hp_wmi_perform_query(int query, int write, u32 *buffer,
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int buffersize)
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{
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struct bios_return bios_return;
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acpi_status status;
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union acpi_object *obj;
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struct bios_args args = {
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.signature = 0x55434553,
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.command = write ? 0x2 : 0x1,
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.commandtype = query,
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.datasize = buffersize,
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.data = *buffer,
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};
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struct acpi_buffer input = { sizeof(struct bios_args), &args };
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struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL };
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status = wmi_evaluate_method(HPWMI_BIOS_GUID, 0, 0x3, &input, &output);
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obj = output.pointer;
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if (!obj)
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return -EINVAL;
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else if (obj->type != ACPI_TYPE_BUFFER) {
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kfree(obj);
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return -EINVAL;
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}
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bios_return = *((struct bios_return *)obj->buffer.pointer);
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memcpy(buffer, &bios_return.value, sizeof(bios_return.value));
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return 0;
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}
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static int hp_wmi_display_state(void)
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{
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int state = 0;
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int ret = hp_wmi_perform_query(HPWMI_DISPLAY_QUERY, 0, &state,
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sizeof(state));
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if (ret)
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return -EINVAL;
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return state;
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}
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static int hp_wmi_hddtemp_state(void)
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{
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int state = 0;
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int ret = hp_wmi_perform_query(HPWMI_HDDTEMP_QUERY, 0, &state,
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sizeof(state));
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if (ret)
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return -EINVAL;
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return state;
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}
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static int hp_wmi_als_state(void)
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{
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int state = 0;
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int ret = hp_wmi_perform_query(HPWMI_ALS_QUERY, 0, &state,
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sizeof(state));
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if (ret)
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return -EINVAL;
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return state;
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}
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static int hp_wmi_dock_state(void)
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{
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int state = 0;
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int ret = hp_wmi_perform_query(HPWMI_HARDWARE_QUERY, 0, &state,
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sizeof(state));
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if (ret)
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return -EINVAL;
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return state & 0x1;
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}
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static int hp_wmi_tablet_state(void)
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{
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int state = 0;
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int ret = hp_wmi_perform_query(HPWMI_HARDWARE_QUERY, 0, &state,
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sizeof(state));
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if (ret)
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return ret;
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return (state & 0x4) ? 1 : 0;
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}
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static int hp_wmi_set_block(void *data, bool blocked)
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{
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enum hp_wmi_radio r = (enum hp_wmi_radio) data;
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int query = BIT(r + 8) | ((!blocked) << r);
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int ret;
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ret = hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, 1,
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&query, sizeof(query));
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if (ret)
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return -EINVAL;
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return 0;
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}
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static const struct rfkill_ops hp_wmi_rfkill_ops = {
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.set_block = hp_wmi_set_block,
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};
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static bool hp_wmi_get_sw_state(enum hp_wmi_radio r)
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{
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int wireless = 0;
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int mask;
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hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, 0,
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&wireless, sizeof(wireless));
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/* TBD: Pass error */
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mask = 0x200 << (r * 8);
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if (wireless & mask)
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return false;
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else
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return true;
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}
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static bool hp_wmi_get_hw_state(enum hp_wmi_radio r)
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{
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int wireless = 0;
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int mask;
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hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, 0,
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&wireless, sizeof(wireless));
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/* TBD: Pass error */
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mask = 0x800 << (r * 8);
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if (wireless & mask)
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return false;
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else
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return true;
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}
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static ssize_t show_display(struct device *dev, struct device_attribute *attr,
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char *buf)
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{
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int value = hp_wmi_display_state();
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if (value < 0)
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return -EINVAL;
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return sprintf(buf, "%d\n", value);
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}
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static ssize_t show_hddtemp(struct device *dev, struct device_attribute *attr,
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char *buf)
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{
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int value = hp_wmi_hddtemp_state();
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if (value < 0)
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return -EINVAL;
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return sprintf(buf, "%d\n", value);
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}
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static ssize_t show_als(struct device *dev, struct device_attribute *attr,
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char *buf)
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{
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int value = hp_wmi_als_state();
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if (value < 0)
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return -EINVAL;
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return sprintf(buf, "%d\n", value);
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}
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static ssize_t show_dock(struct device *dev, struct device_attribute *attr,
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char *buf)
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{
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int value = hp_wmi_dock_state();
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if (value < 0)
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return -EINVAL;
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return sprintf(buf, "%d\n", value);
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}
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static ssize_t show_tablet(struct device *dev, struct device_attribute *attr,
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char *buf)
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{
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int value = hp_wmi_tablet_state();
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if (value < 0)
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return -EINVAL;
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return sprintf(buf, "%d\n", value);
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}
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static ssize_t set_als(struct device *dev, struct device_attribute *attr,
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const char *buf, size_t count)
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{
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u32 tmp = simple_strtoul(buf, NULL, 10);
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int ret = hp_wmi_perform_query(HPWMI_ALS_QUERY, 1, &tmp,
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sizeof(tmp));
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if (ret)
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return -EINVAL;
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return count;
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}
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static DEVICE_ATTR(display, S_IRUGO, show_display, NULL);
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static DEVICE_ATTR(hddtemp, S_IRUGO, show_hddtemp, NULL);
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static DEVICE_ATTR(als, S_IRUGO | S_IWUSR, show_als, set_als);
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static DEVICE_ATTR(dock, S_IRUGO, show_dock, NULL);
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static DEVICE_ATTR(tablet, S_IRUGO, show_tablet, NULL);
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static void hp_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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u32 event_id, event_data;
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int key_code = 0, ret;
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u32 *location;
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acpi_status status;
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status = wmi_get_event_data(value, &response);
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if (status != AE_OK) {
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printk(KERN_INFO PREFIX "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)
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return;
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if (obj->type != ACPI_TYPE_BUFFER) {
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printk(KERN_INFO "hp-wmi: Unknown response received %d\n",
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obj->type);
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kfree(obj);
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return;
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}
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/*
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* Depending on ACPI version the concatenation of id and event data
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* inside _WED function will result in a 8 or 16 byte buffer.
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*/
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location = (u32 *)obj->buffer.pointer;
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if (obj->buffer.length == 8) {
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event_id = *location;
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event_data = *(location + 1);
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} else if (obj->buffer.length == 16) {
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event_id = *location;
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event_data = *(location + 2);
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} else {
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printk(KERN_INFO "hp-wmi: Unknown buffer length %d\n",
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obj->buffer.length);
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kfree(obj);
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return;
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}
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kfree(obj);
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switch (event_id) {
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case HPWMI_DOCK_EVENT:
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input_report_switch(hp_wmi_input_dev, SW_DOCK,
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hp_wmi_dock_state());
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input_report_switch(hp_wmi_input_dev, SW_TABLET_MODE,
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hp_wmi_tablet_state());
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input_sync(hp_wmi_input_dev);
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break;
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case HPWMI_PARK_HDD:
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break;
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case HPWMI_SMART_ADAPTER:
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break;
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case HPWMI_BEZEL_BUTTON:
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ret = hp_wmi_perform_query(HPWMI_HOTKEY_QUERY, 0,
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&key_code,
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sizeof(key_code));
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if (ret)
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break;
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if (!sparse_keymap_report_event(hp_wmi_input_dev,
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key_code, 1, true))
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printk(KERN_INFO PREFIX "Unknown key code - 0x%x\n",
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key_code);
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break;
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case HPWMI_WIRELESS:
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if (wifi_rfkill)
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rfkill_set_states(wifi_rfkill,
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hp_wmi_get_sw_state(HPWMI_WIFI),
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hp_wmi_get_hw_state(HPWMI_WIFI));
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if (bluetooth_rfkill)
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rfkill_set_states(bluetooth_rfkill,
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hp_wmi_get_sw_state(HPWMI_BLUETOOTH),
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hp_wmi_get_hw_state(HPWMI_BLUETOOTH));
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if (wwan_rfkill)
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rfkill_set_states(wwan_rfkill,
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hp_wmi_get_sw_state(HPWMI_WWAN),
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hp_wmi_get_hw_state(HPWMI_WWAN));
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break;
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case HPWMI_CPU_BATTERY_THROTTLE:
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printk(KERN_INFO PREFIX UNIMP "CPU throttle because of 3 Cell"
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" battery event detected\n");
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break;
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case HPWMI_LOCK_SWITCH:
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break;
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default:
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printk(KERN_INFO PREFIX "Unknown event_id - %d - 0x%x\n",
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event_id, event_data);
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break;
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}
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}
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static int __init hp_wmi_input_setup(void)
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{
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acpi_status status;
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int err;
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hp_wmi_input_dev = input_allocate_device();
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if (!hp_wmi_input_dev)
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return -ENOMEM;
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hp_wmi_input_dev->name = "HP WMI hotkeys";
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hp_wmi_input_dev->phys = "wmi/input0";
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hp_wmi_input_dev->id.bustype = BUS_HOST;
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__set_bit(EV_SW, hp_wmi_input_dev->evbit);
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__set_bit(SW_DOCK, hp_wmi_input_dev->swbit);
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__set_bit(SW_TABLET_MODE, hp_wmi_input_dev->swbit);
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err = sparse_keymap_setup(hp_wmi_input_dev, hp_wmi_keymap, NULL);
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if (err)
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goto err_free_dev;
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/* Set initial hardware state */
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input_report_switch(hp_wmi_input_dev, SW_DOCK, hp_wmi_dock_state());
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input_report_switch(hp_wmi_input_dev, SW_TABLET_MODE,
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hp_wmi_tablet_state());
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input_sync(hp_wmi_input_dev);
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status = wmi_install_notify_handler(HPWMI_EVENT_GUID, hp_wmi_notify, NULL);
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if (ACPI_FAILURE(status)) {
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err = -EIO;
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goto err_free_keymap;
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}
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err = input_register_device(hp_wmi_input_dev);
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if (err)
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goto err_uninstall_notifier;
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return 0;
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err_uninstall_notifier:
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wmi_remove_notify_handler(HPWMI_EVENT_GUID);
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err_free_keymap:
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sparse_keymap_free(hp_wmi_input_dev);
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err_free_dev:
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input_free_device(hp_wmi_input_dev);
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return err;
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}
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static void hp_wmi_input_destroy(void)
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{
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wmi_remove_notify_handler(HPWMI_EVENT_GUID);
|
|
sparse_keymap_free(hp_wmi_input_dev);
|
|
input_unregister_device(hp_wmi_input_dev);
|
|
}
|
|
|
|
static void cleanup_sysfs(struct platform_device *device)
|
|
{
|
|
device_remove_file(&device->dev, &dev_attr_display);
|
|
device_remove_file(&device->dev, &dev_attr_hddtemp);
|
|
device_remove_file(&device->dev, &dev_attr_als);
|
|
device_remove_file(&device->dev, &dev_attr_dock);
|
|
device_remove_file(&device->dev, &dev_attr_tablet);
|
|
}
|
|
|
|
static int __devinit hp_wmi_bios_setup(struct platform_device *device)
|
|
{
|
|
int err;
|
|
int wireless = 0;
|
|
|
|
err = hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, 0, &wireless,
|
|
sizeof(wireless));
|
|
if (err)
|
|
return err;
|
|
|
|
err = device_create_file(&device->dev, &dev_attr_display);
|
|
if (err)
|
|
goto add_sysfs_error;
|
|
err = device_create_file(&device->dev, &dev_attr_hddtemp);
|
|
if (err)
|
|
goto add_sysfs_error;
|
|
err = device_create_file(&device->dev, &dev_attr_als);
|
|
if (err)
|
|
goto add_sysfs_error;
|
|
err = device_create_file(&device->dev, &dev_attr_dock);
|
|
if (err)
|
|
goto add_sysfs_error;
|
|
err = device_create_file(&device->dev, &dev_attr_tablet);
|
|
if (err)
|
|
goto add_sysfs_error;
|
|
|
|
if (wireless & 0x1) {
|
|
wifi_rfkill = rfkill_alloc("hp-wifi", &device->dev,
|
|
RFKILL_TYPE_WLAN,
|
|
&hp_wmi_rfkill_ops,
|
|
(void *) HPWMI_WIFI);
|
|
rfkill_init_sw_state(wifi_rfkill,
|
|
hp_wmi_get_sw_state(HPWMI_WIFI));
|
|
rfkill_set_hw_state(wifi_rfkill,
|
|
hp_wmi_get_hw_state(HPWMI_WIFI));
|
|
err = rfkill_register(wifi_rfkill);
|
|
if (err)
|
|
goto register_wifi_error;
|
|
}
|
|
|
|
if (wireless & 0x2) {
|
|
bluetooth_rfkill = rfkill_alloc("hp-bluetooth", &device->dev,
|
|
RFKILL_TYPE_BLUETOOTH,
|
|
&hp_wmi_rfkill_ops,
|
|
(void *) HPWMI_BLUETOOTH);
|
|
rfkill_init_sw_state(bluetooth_rfkill,
|
|
hp_wmi_get_sw_state(HPWMI_BLUETOOTH));
|
|
rfkill_set_hw_state(bluetooth_rfkill,
|
|
hp_wmi_get_hw_state(HPWMI_BLUETOOTH));
|
|
err = rfkill_register(bluetooth_rfkill);
|
|
if (err)
|
|
goto register_bluetooth_error;
|
|
}
|
|
|
|
if (wireless & 0x4) {
|
|
wwan_rfkill = rfkill_alloc("hp-wwan", &device->dev,
|
|
RFKILL_TYPE_WWAN,
|
|
&hp_wmi_rfkill_ops,
|
|
(void *) HPWMI_WWAN);
|
|
rfkill_init_sw_state(wwan_rfkill,
|
|
hp_wmi_get_sw_state(HPWMI_WWAN));
|
|
rfkill_set_hw_state(wwan_rfkill,
|
|
hp_wmi_get_hw_state(HPWMI_WWAN));
|
|
err = rfkill_register(wwan_rfkill);
|
|
if (err)
|
|
goto register_wwan_err;
|
|
}
|
|
|
|
return 0;
|
|
register_wwan_err:
|
|
rfkill_destroy(wwan_rfkill);
|
|
if (bluetooth_rfkill)
|
|
rfkill_unregister(bluetooth_rfkill);
|
|
register_bluetooth_error:
|
|
rfkill_destroy(bluetooth_rfkill);
|
|
if (wifi_rfkill)
|
|
rfkill_unregister(wifi_rfkill);
|
|
register_wifi_error:
|
|
rfkill_destroy(wifi_rfkill);
|
|
add_sysfs_error:
|
|
cleanup_sysfs(device);
|
|
return err;
|
|
}
|
|
|
|
static int __exit hp_wmi_bios_remove(struct platform_device *device)
|
|
{
|
|
cleanup_sysfs(device);
|
|
|
|
if (wifi_rfkill) {
|
|
rfkill_unregister(wifi_rfkill);
|
|
rfkill_destroy(wifi_rfkill);
|
|
}
|
|
if (bluetooth_rfkill) {
|
|
rfkill_unregister(bluetooth_rfkill);
|
|
rfkill_destroy(bluetooth_rfkill);
|
|
}
|
|
if (wwan_rfkill) {
|
|
rfkill_unregister(wwan_rfkill);
|
|
rfkill_destroy(wwan_rfkill);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int hp_wmi_resume_handler(struct device *device)
|
|
{
|
|
/*
|
|
* Hardware state may have changed while suspended, so trigger
|
|
* input events for the current state. As this is a switch,
|
|
* the input layer will only actually pass it on if the state
|
|
* changed.
|
|
*/
|
|
if (hp_wmi_input_dev) {
|
|
input_report_switch(hp_wmi_input_dev, SW_DOCK,
|
|
hp_wmi_dock_state());
|
|
input_report_switch(hp_wmi_input_dev, SW_TABLET_MODE,
|
|
hp_wmi_tablet_state());
|
|
input_sync(hp_wmi_input_dev);
|
|
}
|
|
|
|
if (wifi_rfkill)
|
|
rfkill_set_states(wifi_rfkill,
|
|
hp_wmi_get_sw_state(HPWMI_WIFI),
|
|
hp_wmi_get_hw_state(HPWMI_WIFI));
|
|
if (bluetooth_rfkill)
|
|
rfkill_set_states(bluetooth_rfkill,
|
|
hp_wmi_get_sw_state(HPWMI_BLUETOOTH),
|
|
hp_wmi_get_hw_state(HPWMI_BLUETOOTH));
|
|
if (wwan_rfkill)
|
|
rfkill_set_states(wwan_rfkill,
|
|
hp_wmi_get_sw_state(HPWMI_WWAN),
|
|
hp_wmi_get_hw_state(HPWMI_WWAN));
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int __init hp_wmi_init(void)
|
|
{
|
|
int err;
|
|
int event_capable = wmi_has_guid(HPWMI_EVENT_GUID);
|
|
int bios_capable = wmi_has_guid(HPWMI_BIOS_GUID);
|
|
|
|
if (event_capable) {
|
|
err = hp_wmi_input_setup();
|
|
if (err)
|
|
return err;
|
|
}
|
|
|
|
if (bios_capable) {
|
|
err = platform_driver_register(&hp_wmi_driver);
|
|
if (err)
|
|
goto err_driver_reg;
|
|
hp_wmi_platform_dev = platform_device_alloc("hp-wmi", -1);
|
|
if (!hp_wmi_platform_dev) {
|
|
err = -ENOMEM;
|
|
goto err_device_alloc;
|
|
}
|
|
err = platform_device_add(hp_wmi_platform_dev);
|
|
if (err)
|
|
goto err_device_add;
|
|
}
|
|
|
|
if (!bios_capable && !event_capable)
|
|
return -ENODEV;
|
|
|
|
return 0;
|
|
|
|
err_device_add:
|
|
platform_device_put(hp_wmi_platform_dev);
|
|
err_device_alloc:
|
|
platform_driver_unregister(&hp_wmi_driver);
|
|
err_driver_reg:
|
|
if (event_capable)
|
|
hp_wmi_input_destroy();
|
|
|
|
return err;
|
|
}
|
|
|
|
static void __exit hp_wmi_exit(void)
|
|
{
|
|
if (wmi_has_guid(HPWMI_EVENT_GUID))
|
|
hp_wmi_input_destroy();
|
|
|
|
if (hp_wmi_platform_dev) {
|
|
platform_device_unregister(hp_wmi_platform_dev);
|
|
platform_driver_unregister(&hp_wmi_driver);
|
|
}
|
|
}
|
|
|
|
module_init(hp_wmi_init);
|
|
module_exit(hp_wmi_exit);
|