/*
* HP WMI hotkeys
*
* Copyright (C) 2008 Red Hat <mjg@redhat.com>
*
* Portions based on wistron_btns.c:
* Copyright (C) 2005 Miloslav Trmac <mitr@volny.cz>
* Copyright (C) 2005 Bernhard Rosenkraenzer <bero@arklinux.org>
* Copyright (C) 2005 Dmitry Torokhov <dtor@mail.ru>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/types.h>
#include <linux/input.h>
#include <acpi/acpi_drivers.h>
#include <linux/platform_device.h>
#include <linux/acpi.h>
#include <linux/rfkill.h>
#include <linux/string.h>
MODULE_AUTHOR("Matthew Garrett <mjg59@srcf.ucam.org>");
MODULE_DESCRIPTION("HP laptop WMI hotkeys driver");
MODULE_LICENSE("GPL");
MODULE_ALIAS("wmi:95F24279-4D7B-4334-9387-ACCDC67EF61C");
MODULE_ALIAS("wmi:5FB7F034-2C63-45e9-BE91-3D44E2C707E4");
#define HPWMI_EVENT_GUID "95F24279-4D7B-4334-9387-ACCDC67EF61C"
#define HPWMI_BIOS_GUID "5FB7F034-2C63-45e9-BE91-3D44E2C707E4"
#define HPWMI_DISPLAY_QUERY 0x1
#define HPWMI_HDDTEMP_QUERY 0x2
#define HPWMI_ALS_QUERY 0x3
#define HPWMI_DOCK_QUERY 0x4
#define HPWMI_WIRELESS_QUERY 0x5
static int __init hp_wmi_bios_setup(struct platform_device *device);
static int __exit hp_wmi_bios_remove(struct platform_device *device);
struct bios_args {
u32 signature;
u32 command;
u32 commandtype;
u32 datasize;
u32 data;
};
struct bios_return {
u32 sigpass;
u32 return_code;
u32 value;
};
struct key_entry {
char type; /* See KE_* below */
u8 code;
u16 keycode;
};
enum { KE_KEY, KE_SW, KE_END };
static struct key_entry hp_wmi_keymap[] = {
{KE_SW, 0x01, SW_DOCK},
{KE_KEY, 0x02, KEY_BRIGHTNESSUP},
{KE_KEY, 0x03, KEY_BRIGHTNESSDOWN},
{KE_KEY, 0x04, KEY_HELP},
{KE_END, 0}
};
static struct input_dev *hp_wmi_input_dev;
static struct platform_device *hp_wmi_platform_dev;
static struct rfkill *wifi_rfkill;
static struct rfkill *bluetooth_rfkill;
static struct rfkill *wwan_rfkill;
static struct platform_driver hp_wmi_driver = {
.driver = {
.name = "hp-wmi",
.owner = THIS_MODULE,
},
.probe = hp_wmi_bios_setup,
.remove = hp_wmi_bios_remove,
};
static int hp_wmi_perform_query(int query, int write, int value)
{
struct bios_return bios_return;
acpi_status status;
union acpi_object *obj;
struct bios_args args = {
.signature = 0x55434553,
.command = write ? 0x2 : 0x1,
.commandtype = query,
.datasize = write ? 0x4 : 0,
.data = value,
};
struct acpi_buffer input = { sizeof(struct bios_args), &args };
struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL };
status = wmi_evaluate_method(HPWMI_BIOS_GUID, 0, 0x3, &input, &output);
obj = output.pointer;
if (!obj || obj->type != ACPI_TYPE_BUFFER)
return -EINVAL;
bios_return = *((struct bios_return *)obj->buffer.pointer);
if (bios_return.return_code > 0)
return bios_return.return_code * -1;
else
return bios_return.value;
}
static int hp_wmi_display_state(void)
{
return hp_wmi_perform_query(HPWMI_DISPLAY_QUERY, 0, 0);
}
static int hp_wmi_hddtemp_state(void)
{
return hp_wmi_perform_query(HPWMI_HDDTEMP_QUERY, 0, 0);
}
static int hp_wmi_als_state(void)
{
return hp_wmi_perform_query(HPWMI_ALS_QUERY, 0, 0);
}
static int hp_wmi_dock_state(void)
{
return hp_wmi_perform_query(HPWMI_DOCK_QUERY, 0, 0);
}
static int hp_wmi_wifi_set(void *data, enum rfkill_state state)
{
if (state)
return hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, 1, 0x101);
else
return hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, 1, 0x100);
}
static int hp_wmi_bluetooth_set(void *data, enum rfkill_state state)
{
if (state)
return hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, 1, 0x202);
else
return hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, 1, 0x200);
}
static int hp_wmi_wwan_set(void *data, enum rfkill_state state)
{
if (state)
return hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, 1, 0x404);
else
return hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, 1, 0x400);
}
static int hp_wmi_wifi_state(void)
{
int wireless = hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, 0, 0);
if (wireless & 0x100)
return 1;
else
return 0;
}
static int hp_wmi_bluetooth_state(void)
{
int wireless = hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, 0, 0);
if (wireless & 0x10000)
return 1;
else
return 0;
}
static int hp_wmi_wwan_state(void)
{
int wireless = hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, 0, 0);
if (wireless & 0x1000000)
return 1;
else
return 0;
}
static ssize_t show_display(struct device *dev, struct device_attribute *attr,
char *buf)
{
int value = hp_wmi_display_state();
if (value < 0)
return -EINVAL;
return sprintf(buf, "%d\n", value);
}
static ssize_t show_hddtemp(struct device *dev, struct device_attribute *attr,
char *buf)
{
int value = hp_wmi_hddtemp_state();
if (value < 0)
return -EINVAL;
return sprintf(buf, "%d\n", value);
}
static ssize_t show_als(struct device *dev, struct device_attribute *attr,
char *buf)
{
int value = hp_wmi_als_state();
if (value < 0)
return -EINVAL;
return sprintf(buf, "%d\n", value);
}
static ssize_t show_dock(struct device *dev, struct device_attribute *attr,
char *buf)
{
int value = hp_wmi_dock_state();
if (value < 0)
return -EINVAL;
return sprintf(buf, "%d\n", value);
}
static ssize_t set_als(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
{
u32 tmp = simple_strtoul(buf, NULL, 10);
hp_wmi_perform_query(HPWMI_ALS_QUERY, 1, tmp);
return count;
}
static DEVICE_ATTR(display, S_IRUGO, show_display, NULL);
static DEVICE_ATTR(hddtemp, S_IRUGO, show_hddtemp, NULL);
static DEVICE_ATTR(als, S_IRUGO | S_IWUSR, show_als, set_als);
static DEVICE_ATTR(dock, S_IRUGO, show_dock, NULL);
static struct key_entry *hp_wmi_get_entry_by_scancode(int code)
{
struct key_entry *key;
for (key = hp_wmi_keymap; key->type != KE_END; key++)
if (code == key->code)
return key;
return NULL;
}
static struct key_entry *hp_wmi_get_entry_by_keycode(int keycode)
{
struct key_entry *key;
for (key = hp_wmi_keymap; key->type != KE_END; key++)
if (key->type == KE_KEY && keycode == key->keycode)
return key;
return NULL;
}
static int hp_wmi_getkeycode(struct input_dev *dev, int scancode, int *keycode)
{
struct key_entry *key = hp_wmi_get_entry_by_scancode(scancode);
if (key && key->type == KE_KEY) {
*keycode = key->keycode;
return 0;
}
return -EINVAL;
}
static int hp_wmi_setkeycode(struct input_dev *dev, int scancode, int keycode)
{
struct key_entry *key;
int old_keycode;
if (keycode < 0 || keycode > KEY_MAX)
return -EINVAL;
key = hp_wmi_get_entry_by_scancode(scancode);
if (key && key->type == KE_KEY) {
old_keycode = key->keycode;
key->keycode = keycode;
set_bit(keycode, dev->keybit);
if (!hp_wmi_get_entry_by_keycode(old_keycode))
clear_bit(old_keycode, dev->keybit);
return 0;
}
return -EINVAL;
}
void hp_wmi_notify(u32 value, void *context)
{
struct acpi_buffer response = { ACPI_ALLOCATE_BUFFER, NULL };
static struct key_entry *key;
union acpi_object *obj;
wmi_get_event_data(value, &response);
obj = (union acpi_object *)response.pointer;
if (obj && obj->type == ACPI_TYPE_BUFFER && obj->buffer.length == 8) {
int eventcode = *((u8 *) obj->buffer.pointer);
key = hp_wmi_get_entry_by_scancode(eventcode);
if (key) {
switch (key->type) {
case KE_KEY:
input_report_key(hp_wmi_input_dev,
key->keycode, 1);
input_sync(hp_wmi_input_dev);
input_report_key(hp_wmi_input_dev,
key->keycode, 0);
input_sync(hp_wmi_input_dev);
break;
case KE_SW:
input_report_switch(hp_wmi_input_dev,
key->keycode,
hp_wmi_dock_state());
input_sync(hp_wmi_input_dev);
break;
}
} else if (eventcode == 0x5) {
if (wifi_rfkill)
wifi_rfkill->state = hp_wmi_wifi_state();
if (bluetooth_rfkill)
bluetooth_rfkill->state =
hp_wmi_bluetooth_state();
if (wwan_rfkill)
wwan_rfkill->state = hp_wmi_wwan_state();
} else
printk(KERN_INFO "HP WMI: Unknown key pressed - %x\n",
eventcode);
} else
printk(KERN_INFO "HP WMI: Unknown response received\n");
}
static int __init hp_wmi_input_setup(void)
{
struct key_entry *key;
int err;
hp_wmi_input_dev = input_allocate_device();
hp_wmi_input_dev->name = "HP WMI hotkeys";
hp_wmi_input_dev->phys = "wmi/input0";
hp_wmi_input_dev->id.bustype = BUS_HOST;
hp_wmi_input_dev->getkeycode = hp_wmi_getkeycode;
hp_wmi_input_dev->setkeycode = hp_wmi_setkeycode;
for (key = hp_wmi_keymap; key->type != KE_END; key++) {
switch (key->type) {
case KE_KEY:
set_bit(EV_KEY, hp_wmi_input_dev->evbit);
set_bit(key->keycode, hp_wmi_input_dev->keybit);
break;
case KE_SW:
set_bit(EV_SW, hp_wmi_input_dev->evbit);
set_bit(key->keycode, hp_wmi_input_dev->swbit);
break;
}
}
err = input_register_device(hp_wmi_input_dev);
if (err) {
input_free_device(hp_wmi_input_dev);
return err;
}
return 0;
}
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);
}
static int __init hp_wmi_bios_setup(struct platform_device *device)
{
int 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;
wifi_rfkill = rfkill_allocate(&device->dev, RFKILL_TYPE_WLAN);
wifi_rfkill->name = "hp-wifi";
wifi_rfkill->state = hp_wmi_wifi_state();
wifi_rfkill->toggle_radio = hp_wmi_wifi_set;
wifi_rfkill->user_claim_unsupported = 1;
bluetooth_rfkill = rfkill_allocate(&device->dev,
RFKILL_TYPE_BLUETOOTH);
bluetooth_rfkill->name = "hp-bluetooth";
bluetooth_rfkill->state = hp_wmi_bluetooth_state();
bluetooth_rfkill->toggle_radio = hp_wmi_bluetooth_set;
bluetooth_rfkill->user_claim_unsupported = 1;
wwan_rfkill = rfkill_allocate(&device->dev, RFKILL_TYPE_WIMAX);
wwan_rfkill->name = "hp-wwan";
wwan_rfkill->state = hp_wmi_wwan_state();
wwan_rfkill->toggle_radio = hp_wmi_wwan_set;
wwan_rfkill->user_claim_unsupported = 1;
rfkill_register(wifi_rfkill);
rfkill_register(bluetooth_rfkill);
rfkill_register(wwan_rfkill);
return 0;
add_sysfs_error:
cleanup_sysfs(device);
return err;
}
static int __exit hp_wmi_bios_remove(struct platform_device *device)
{
cleanup_sysfs(device);
rfkill_unregister(wifi_rfkill);
rfkill_unregister(bluetooth_rfkill);
rfkill_unregister(wwan_rfkill);
return 0;
}
static int __init hp_wmi_init(void)
{
int err;
if (wmi_has_guid(HPWMI_EVENT_GUID)) {
err = wmi_install_notify_handler(HPWMI_EVENT_GUID,
hp_wmi_notify, NULL);
if (!err)
hp_wmi_input_setup();
}
if (wmi_has_guid(HPWMI_BIOS_GUID)) {
err = platform_driver_register(&hp_wmi_driver);
if (err)
return 0;
hp_wmi_platform_dev = platform_device_alloc("hp-wmi", -1);
if (!hp_wmi_platform_dev) {
platform_driver_unregister(&hp_wmi_driver);
return 0;
}
platform_device_add(hp_wmi_platform_dev);
}
return 0;
}
static void __exit hp_wmi_exit(void)
{
if (wmi_has_guid(HPWMI_EVENT_GUID)) {
wmi_remove_notify_handler(HPWMI_EVENT_GUID);
input_unregister_device(hp_wmi_input_dev);
}
if (hp_wmi_platform_dev) {
platform_device_del(hp_wmi_platform_dev);
platform_driver_unregister(&hp_wmi_driver);
}
}
module_init(hp_wmi_init);
module_exit(hp_wmi_exit);
