711 lines
17 KiB
C
711 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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enum hp_return_value {
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HPWMI_RET_WRONG_SIGNATURE = 0x02,
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HPWMI_RET_UNKNOWN_COMMAND = 0x03,
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HPWMI_RET_UNKNOWN_CMDTYPE = 0x04,
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HPWMI_RET_INVALID_PARAMETERS = 0x05,
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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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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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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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if (bios_return.return_code) {
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if (bios_return.return_code != HPWMI_RET_UNKNOWN_CMDTYPE)
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printk(KERN_WARNING PREFIX "query 0x%x returned "
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"error 0x%x\n",
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query, bios_return.return_code);
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kfree(obj);
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return bios_return.return_code;
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}
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memcpy(buffer, &bios_return.value, sizeof(bios_return.value));
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kfree(obj);
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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);
|
|
err_free_keymap:
|
|
sparse_keymap_free(hp_wmi_input_dev);
|
|
err_free_dev:
|
|
input_free_device(hp_wmi_input_dev);
|
|
return err;
|
|
}
|
|
|
|
static void hp_wmi_input_destroy(void)
|
|
{
|
|
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);
|