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kernel-fxtec-pro1x/drivers/platform/x86/hp-wmi.c
Frans Pop 4c395bdd3f hp-wmi: notify of a potential docking state change on resume 
It is possible that the system gets docked or undocked while it's
suspended. Generate an input event on resume to notify user space
if there was a state change.

As it is a switch, we can generate the event unconditionally; the
input layer will only pass it on if there is an actual change.

Signed-off-by: Frans Pop <elendil@planet.nl>
Cc: Matthew Garrett <mjg59@srcf.ucam.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Len Brown <len.brown@intel.com>
2009-03-15 23:45:28 -04:00

554 lines
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/*
* 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
#define HPWMI_HOTKEY_QUERY 0xc
static int __init hp_wmi_bios_setup(struct platform_device *device);
static int __exit hp_wmi_bios_remove(struct platform_device *device);
static int hp_wmi_resume_handler(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 */
u16 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, 0x20e6, KEY_PROG1},
{KE_KEY, 0x2142, KEY_MEDIA},
{KE_KEY, 0x213b, KEY_INFO},
{KE_KEY, 0x231b, 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,
.resume = hp_wmi_resume_handler,
};
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 RFKILL_STATE_UNBLOCKED;
else
return RFKILL_STATE_SOFT_BLOCKED;
}
static int hp_wmi_bluetooth_state(void)
{
int wireless = hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, 0, 0);
if (wireless & 0x10000)
return RFKILL_STATE_UNBLOCKED;
else
return RFKILL_STATE_SOFT_BLOCKED;
}
static int hp_wmi_wwan_state(void)
{
int wireless = hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, 0, 0);
if (wireless & 0x1000000)
return RFKILL_STATE_UNBLOCKED;
else
return RFKILL_STATE_SOFT_BLOCKED;
}
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;
}
static 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);
if (eventcode == 0x4)
eventcode = hp_wmi_perform_query(HPWMI_HOTKEY_QUERY, 0,
0);
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)
rfkill_force_state(wifi_rfkill,
hp_wmi_wifi_state());
if (bluetooth_rfkill)
rfkill_force_state(bluetooth_rfkill,
hp_wmi_bluetooth_state());
if (wwan_rfkill)
rfkill_force_state(wwan_rfkill,
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);
/* Set initial dock state */
input_report_switch(hp_wmi_input_dev, key->keycode,
hp_wmi_dock_state());
input_sync(hp_wmi_input_dev);
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;
int wireless = hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, 0, 0);
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;
if (wireless & 0x1) {
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;
err = rfkill_register(wifi_rfkill);
if (err)
goto add_sysfs_error;
}
if (wireless & 0x2) {
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;
err = rfkill_register(bluetooth_rfkill);
if (err)
goto register_bluetooth_error;
}
if (wireless & 0x4) {
wwan_rfkill = rfkill_allocate(&device->dev, RFKILL_TYPE_WWAN);
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;
err = rfkill_register(wwan_rfkill);
if (err)
goto register_wwan_err;
}
return 0;
register_wwan_err:
if (bluetooth_rfkill)
rfkill_unregister(bluetooth_rfkill);
register_bluetooth_error:
if (wifi_rfkill)
rfkill_unregister(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);
if (bluetooth_rfkill)
rfkill_unregister(bluetooth_rfkill);
if (wwan_rfkill)
rfkill_unregister(wwan_rfkill);
return 0;
}
static int hp_wmi_resume_handler(struct platform_device *device)
{
struct key_entry *key;
/*
* Docking state may have changed while suspended, so trigger
* an input event for the current state. As this is a switch,
* the input layer will only actually pass it on if the state
* changed.
*/
for (key = hp_wmi_keymap; key->type != KE_END; key++) {
switch (key->type) {
case KE_SW:
input_report_switch(hp_wmi_input_dev, key->keycode,
hp_wmi_dock_state());
input_sync(hp_wmi_input_dev);
break;
}
}
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);
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