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linux/drivers/platform/x86/asus-wmi.c
João Paulo Rechi Vita 78f3ac76d9 platform/x86: asus-wmi: Tell the EC the OS will handle the display off hotkey 
In the past, Asus firmwares would change the panel backlight directly
through the EC when the display off hotkey (Fn+F7) was pressed, and
only notify the OS of such change, with 0x33 when the LCD was ON and
0x34 when the LCD was OFF. These are currently mapped to
KEY_DISPLAYTOGGLE and KEY_DISPLAY_OFF, respectively.

Most recently the EC on Asus most machines lost ability to toggle the
LCD backlight directly, but unless the OS informs the firmware it is
going to handle the display toggle hotkey events, the firmware still
tries change the brightness through the EC, to no effect. The end result
is a long list (at Endless we counted 11) of Asus laptop models where
the display toggle hotkey does not perform any action. Our firmware
engineers contacts at Asus were surprised that there were still machines
out there with the old behavior.

Calling WMNB(ASUS_WMI_DEVID_BACKLIGHT==0x00050011, 2) on the _WDG device
tells the firmware that it should let the OS handle the display toggle
event, in which case it will simply notify the OS of a key press with
0x35, as shown by the DSDT excerpts bellow.

 Scope (_SB)
 {
     (...)

     Device (ATKD)
     {
         (...)

         Name (_WDG, Buffer (0x28)
         {
             /* 0000 */  0xD0, 0x5E, 0x84, 0x97, 0x6D, 0x4E, 0xDE, 0x11,
             /* 0008 */  0x8A, 0x39, 0x08, 0x00, 0x20, 0x0C, 0x9A, 0x66,
             /* 0010 */  0x4E, 0x42, 0x01, 0x02, 0x35, 0xBB, 0x3C, 0x0B,
             /* 0018 */  0xC2, 0xE3, 0xED, 0x45, 0x91, 0xC2, 0x4C, 0x5A,
             /* 0020 */  0x6D, 0x19, 0x5D, 0x1C, 0xFF, 0x00, 0x01, 0x08
         })
         Method (WMNB, 3, Serialized)
         {
             CreateDWordField (Arg2, Zero, IIA0)
             CreateDWordField (Arg2, 0x04, IIA1)
             Local0 = (Arg1 & 0xFFFFFFFF)

             (...)

             If ((Local0 == 0x53564544))
             {
                 (...)

                 If ((IIA0 == 0x00050011))
                 {
                     If ((IIA1 == 0x02))
                     {
                         ^^PCI0.SBRG.EC0.SPIN (0x72, One)
                         ^^PCI0.SBRG.EC0.BLCT = One
                     }

                     Return (One)
                 }
             }
             (...)
         }
         (...)
     }
     (...)
 }
 (...)

 Scope (_SB.PCI0.SBRG.EC0)
 {
     (...)

     Name (BLCT, Zero)

     (...)

     Method (_Q10, 0, NotSerialized)  // _Qxx: EC Query
     {
         If ((BLCT == Zero))
         {
             Local0 = One
             Local0 = RPIN (0x72)
             Local0 ^= One
             SPIN (0x72, Local0)
             If (ATKP)
             {
                 Local0 = (0x34 - Local0)
                 ^^^^ATKD.IANE (Local0)
             }
         }
         ElseIf ((BLCT == One))
         {
             If (ATKP)
             {
                 ^^^^ATKD.IANE (0x35)
             }
         }
     }
     (...)
 }

Signed-off-by: João Paulo Rechi Vita <jprvita@endlessm.com>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
2018-11-07 15:56:42 +02:00

2339 lines
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/*
* Asus PC WMI hotkey driver
*
* Copyright(C) 2010 Intel Corporation.
* Copyright(C) 2010-2011 Corentin Chary <corentin.chary@gmail.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
*/
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/types.h>
#include <linux/slab.h>
#include <linux/input.h>
#include <linux/input/sparse-keymap.h>
#include <linux/fb.h>
#include <linux/backlight.h>
#include <linux/leds.h>
#include <linux/rfkill.h>
#include <linux/pci.h>
#include <linux/pci_hotplug.h>
#include <linux/hwmon.h>
#include <linux/hwmon-sysfs.h>
#include <linux/debugfs.h>
#include <linux/seq_file.h>
#include <linux/platform_data/x86/asus-wmi.h>
#include <linux/platform_device.h>
#include <linux/thermal.h>
#include <linux/acpi.h>
#include <linux/dmi.h>
#include <acpi/video.h>
#include "asus-wmi.h"
MODULE_AUTHOR("Corentin Chary <corentin.chary@gmail.com>, "
"Yong Wang <yong.y.wang@intel.com>");
MODULE_DESCRIPTION("Asus Generic WMI Driver");
MODULE_LICENSE("GPL");
#define to_asus_wmi_driver(pdrv) \
(container_of((pdrv), struct asus_wmi_driver, platform_driver))
#define ASUS_WMI_MGMT_GUID "97845ED0-4E6D-11DE-8A39-0800200C9A66"
#define NOTIFY_BRNUP_MIN 0x11
#define NOTIFY_BRNUP_MAX 0x1f
#define NOTIFY_BRNDOWN_MIN 0x20
#define NOTIFY_BRNDOWN_MAX 0x2e
#define NOTIFY_KBD_BRTUP 0xc4
#define NOTIFY_KBD_BRTDWN 0xc5
#define NOTIFY_KBD_BRTTOGGLE 0xc7
#define ASUS_FAN_DESC "cpu_fan"
#define ASUS_FAN_MFUN 0x13
#define ASUS_FAN_SFUN_READ 0x06
#define ASUS_FAN_SFUN_WRITE 0x07
#define ASUS_FAN_CTRL_MANUAL 1
#define ASUS_FAN_CTRL_AUTO 2
#define USB_INTEL_XUSB2PR 0xD0
#define PCI_DEVICE_ID_INTEL_LYNXPOINT_LP_XHCI 0x9c31
static const char * const ashs_ids[] = { "ATK4001", "ATK4002", NULL };
static bool ashs_present(void)
{
int i = 0;
while (ashs_ids[i]) {
if (acpi_dev_found(ashs_ids[i++]))
return true;
}
return false;
}
struct bios_args {
u32 arg0;
u32 arg1;
} __packed;
/*
* Struct that's used for all methods called via AGFN. Naming is
* identically to the AML code.
*/
struct agfn_args {
u16 mfun; /* probably "Multi-function" to be called */
u16 sfun; /* probably "Sub-function" to be called */
u16 len; /* size of the hole struct, including subfunction fields */
u8 stas; /* not used by now */
u8 err; /* zero on success */
} __packed;
/* struct used for calling fan read and write methods */
struct fan_args {
struct agfn_args agfn; /* common fields */
u8 fan; /* fan number: 0: set auto mode 1: 1st fan */
u32 speed; /* read: RPM/100 - write: 0-255 */
} __packed;
/*
* <platform>/ - debugfs root directory
* dev_id - current dev_id
* ctrl_param - current ctrl_param
* method_id - current method_id
* devs - call DEVS(dev_id, ctrl_param) and print result
* dsts - call DSTS(dev_id) and print result
* call - call method_id(dev_id, ctrl_param) and print result
*/
struct asus_wmi_debug {
struct dentry *root;
u32 method_id;
u32 dev_id;
u32 ctrl_param;
};
struct asus_rfkill {
struct asus_wmi *asus;
struct rfkill *rfkill;
u32 dev_id;
};
struct asus_wmi {
int dsts_id;
int spec;
int sfun;
struct input_dev *inputdev;
struct backlight_device *backlight_device;
struct platform_device *platform_device;
struct led_classdev wlan_led;
int wlan_led_wk;
struct led_classdev tpd_led;
int tpd_led_wk;
struct led_classdev kbd_led;
int kbd_led_wk;
struct led_classdev lightbar_led;
int lightbar_led_wk;
struct workqueue_struct *led_workqueue;
struct work_struct tpd_led_work;
struct work_struct wlan_led_work;
struct work_struct lightbar_led_work;
struct asus_rfkill wlan;
struct asus_rfkill bluetooth;
struct asus_rfkill wimax;
struct asus_rfkill wwan3g;
struct asus_rfkill gps;
struct asus_rfkill uwb;
bool asus_hwmon_fan_manual_mode;
int asus_hwmon_num_fans;
int asus_hwmon_pwm;
struct hotplug_slot hotplug_slot;
struct mutex hotplug_lock;
struct mutex wmi_lock;
struct workqueue_struct *hotplug_workqueue;
struct work_struct hotplug_work;
struct asus_wmi_debug debug;
struct asus_wmi_driver *driver;
};
static int asus_wmi_input_init(struct asus_wmi *asus)
{
int err;
asus->inputdev = input_allocate_device();
if (!asus->inputdev)
return -ENOMEM;
asus->inputdev->name = asus->driver->input_name;
asus->inputdev->phys = asus->driver->input_phys;
asus->inputdev->id.bustype = BUS_HOST;
asus->inputdev->dev.parent = &asus->platform_device->dev;
set_bit(EV_REP, asus->inputdev->evbit);
err = sparse_keymap_setup(asus->inputdev, asus->driver->keymap, NULL);
if (err)
goto err_free_dev;
err = input_register_device(asus->inputdev);
if (err)
goto err_free_dev;
return 0;
err_free_dev:
input_free_device(asus->inputdev);
return err;
}
static void asus_wmi_input_exit(struct asus_wmi *asus)
{
if (asus->inputdev)
input_unregister_device(asus->inputdev);
asus->inputdev = NULL;
}
int asus_wmi_evaluate_method(u32 method_id, u32 arg0, u32 arg1, u32 *retval)
{
struct bios_args args = {
.arg0 = arg0,
.arg1 = arg1,
};
struct acpi_buffer input = { (acpi_size) sizeof(args), &args };
struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL };
acpi_status status;
union acpi_object *obj;
u32 tmp = 0;
status = wmi_evaluate_method(ASUS_WMI_MGMT_GUID, 0, method_id,
&input, &output);
if (ACPI_FAILURE(status))
goto exit;
obj = (union acpi_object *)output.pointer;
if (obj && obj->type == ACPI_TYPE_INTEGER)
tmp = (u32) obj->integer.value;
if (retval)
*retval = tmp;
kfree(obj);
exit:
if (ACPI_FAILURE(status))
return -EIO;
if (tmp == ASUS_WMI_UNSUPPORTED_METHOD)
return -ENODEV;
return 0;
}
EXPORT_SYMBOL_GPL(asus_wmi_evaluate_method);
static int asus_wmi_evaluate_method_agfn(const struct acpi_buffer args)
{
struct acpi_buffer input;
u64 phys_addr;
u32 retval;
u32 status = -1;
/*
* Copy to dma capable address otherwise memory corruption occurs as
* bios has to be able to access it.
*/
input.pointer = kzalloc(args.length, GFP_DMA | GFP_KERNEL);
input.length = args.length;
if (!input.pointer)
return -ENOMEM;
phys_addr = virt_to_phys(input.pointer);
memcpy(input.pointer, args.pointer, args.length);
status = asus_wmi_evaluate_method(ASUS_WMI_METHODID_AGFN,
phys_addr, 0, &retval);
if (!status)
memcpy(args.pointer, input.pointer, args.length);
kfree(input.pointer);
if (status)
return -ENXIO;
return retval;
}
static int asus_wmi_get_devstate(struct asus_wmi *asus, u32 dev_id, u32 *retval)
{
return asus_wmi_evaluate_method(asus->dsts_id, dev_id, 0, retval);
}
static int asus_wmi_set_devstate(u32 dev_id, u32 ctrl_param,
u32 *retval)
{
return asus_wmi_evaluate_method(ASUS_WMI_METHODID_DEVS, dev_id,
ctrl_param, retval);
}
/* Helper for special devices with magic return codes */
static int asus_wmi_get_devstate_bits(struct asus_wmi *asus,
u32 dev_id, u32 mask)
{
u32 retval = 0;
int err;
err = asus_wmi_get_devstate(asus, dev_id, &retval);
if (err < 0)
return err;
if (!(retval & ASUS_WMI_DSTS_PRESENCE_BIT))
return -ENODEV;
if (mask == ASUS_WMI_DSTS_STATUS_BIT) {
if (retval & ASUS_WMI_DSTS_UNKNOWN_BIT)
return -ENODEV;
}
return retval & mask;
}
static int asus_wmi_get_devstate_simple(struct asus_wmi *asus, u32 dev_id)
{
return asus_wmi_get_devstate_bits(asus, dev_id,
ASUS_WMI_DSTS_STATUS_BIT);
}
/*
* LEDs
*/
/*
* These functions actually update the LED's, and are called from a
* workqueue. By doing this as separate work rather than when the LED
* subsystem asks, we avoid messing with the Asus ACPI stuff during a
* potentially bad time, such as a timer interrupt.
*/
static void tpd_led_update(struct work_struct *work)
{
int ctrl_param;
struct asus_wmi *asus;
asus = container_of(work, struct asus_wmi, tpd_led_work);
ctrl_param = asus->tpd_led_wk;
asus_wmi_set_devstate(ASUS_WMI_DEVID_TOUCHPAD_LED, ctrl_param, NULL);
}
static void tpd_led_set(struct led_classdev *led_cdev,
enum led_brightness value)
{
struct asus_wmi *asus;
asus = container_of(led_cdev, struct asus_wmi, tpd_led);
asus->tpd_led_wk = !!value;
queue_work(asus->led_workqueue, &asus->tpd_led_work);
}
static int read_tpd_led_state(struct asus_wmi *asus)
{
return asus_wmi_get_devstate_simple(asus, ASUS_WMI_DEVID_TOUCHPAD_LED);
}
static enum led_brightness tpd_led_get(struct led_classdev *led_cdev)
{
struct asus_wmi *asus;
asus = container_of(led_cdev, struct asus_wmi, tpd_led);
return read_tpd_led_state(asus);
}
static void kbd_led_update(struct asus_wmi *asus)
{
int ctrl_param = 0;
/*
* bits 0-2: level
* bit 7: light on/off
*/
if (asus->kbd_led_wk > 0)
ctrl_param = 0x80 | (asus->kbd_led_wk & 0x7F);
asus_wmi_set_devstate(ASUS_WMI_DEVID_KBD_BACKLIGHT, ctrl_param, NULL);
}
static int kbd_led_read(struct asus_wmi *asus, int *level, int *env)
{
int retval;
/*
* bits 0-2: level
* bit 7: light on/off
* bit 8-10: environment (0: dark, 1: normal, 2: light)
* bit 17: status unknown
*/
retval = asus_wmi_get_devstate_bits(asus, ASUS_WMI_DEVID_KBD_BACKLIGHT,
0xFFFF);
/* Unknown status is considered as off */
if (retval == 0x8000)
retval = 0;
if (retval >= 0) {
if (level)
*level = retval & 0x7F;
if (env)
*env = (retval >> 8) & 0x7F;
retval = 0;
}
return retval;
}
static void do_kbd_led_set(struct led_classdev *led_cdev, int value)
{
struct asus_wmi *asus;
int max_level;
asus = container_of(led_cdev, struct asus_wmi, kbd_led);
max_level = asus->kbd_led.max_brightness;
if (value > max_level)
value = max_level;
else if (value < 0)
value = 0;
asus->kbd_led_wk = value;
kbd_led_update(asus);
}
static void kbd_led_set(struct led_classdev *led_cdev,
enum led_brightness value)
{
do_kbd_led_set(led_cdev, value);
}
static void kbd_led_set_by_kbd(struct asus_wmi *asus, enum led_brightness value)
{
struct led_classdev *led_cdev = &asus->kbd_led;
do_kbd_led_set(led_cdev, value);
led_classdev_notify_brightness_hw_changed(led_cdev, asus->kbd_led_wk);
}
static enum led_brightness kbd_led_get(struct led_classdev *led_cdev)
{
struct asus_wmi *asus;
int retval, value;
asus = container_of(led_cdev, struct asus_wmi, kbd_led);
retval = kbd_led_read(asus, &value, NULL);
if (retval < 0)
return retval;
return value;
}
static int wlan_led_unknown_state(struct asus_wmi *asus)
{
u32 result;
asus_wmi_get_devstate(asus, ASUS_WMI_DEVID_WIRELESS_LED, &result);
return result & ASUS_WMI_DSTS_UNKNOWN_BIT;
}
static int wlan_led_presence(struct asus_wmi *asus)
{
u32 result;
asus_wmi_get_devstate(asus, ASUS_WMI_DEVID_WIRELESS_LED, &result);
return result & ASUS_WMI_DSTS_PRESENCE_BIT;
}
static void wlan_led_update(struct work_struct *work)
{
int ctrl_param;
struct asus_wmi *asus;
asus = container_of(work, struct asus_wmi, wlan_led_work);
ctrl_param = asus->wlan_led_wk;
asus_wmi_set_devstate(ASUS_WMI_DEVID_WIRELESS_LED, ctrl_param, NULL);
}
static void wlan_led_set(struct led_classdev *led_cdev,
enum led_brightness value)
{
struct asus_wmi *asus;
asus = container_of(led_cdev, struct asus_wmi, wlan_led);
asus->wlan_led_wk = !!value;
queue_work(asus->led_workqueue, &asus->wlan_led_work);
}
static enum led_brightness wlan_led_get(struct led_classdev *led_cdev)
{
struct asus_wmi *asus;
u32 result;
asus = container_of(led_cdev, struct asus_wmi, wlan_led);
asus_wmi_get_devstate(asus, ASUS_WMI_DEVID_WIRELESS_LED, &result);
return result & ASUS_WMI_DSTS_BRIGHTNESS_MASK;
}
static void lightbar_led_update(struct work_struct *work)
{
struct asus_wmi *asus;
int ctrl_param;
asus = container_of(work, struct asus_wmi, lightbar_led_work);
ctrl_param = asus->lightbar_led_wk;
asus_wmi_set_devstate(ASUS_WMI_DEVID_LIGHTBAR, ctrl_param, NULL);
}
static void lightbar_led_set(struct led_classdev *led_cdev,
enum led_brightness value)
{
struct asus_wmi *asus;
asus = container_of(led_cdev, struct asus_wmi, lightbar_led);
asus->lightbar_led_wk = !!value;
queue_work(asus->led_workqueue, &asus->lightbar_led_work);
}
static enum led_brightness lightbar_led_get(struct led_classdev *led_cdev)
{
struct asus_wmi *asus;
u32 result;
asus = container_of(led_cdev, struct asus_wmi, lightbar_led);
asus_wmi_get_devstate(asus, ASUS_WMI_DEVID_LIGHTBAR, &result);
return result & ASUS_WMI_DSTS_LIGHTBAR_MASK;
}
static int lightbar_led_presence(struct asus_wmi *asus)
{
u32 result;
asus_wmi_get_devstate(asus, ASUS_WMI_DEVID_LIGHTBAR, &result);
return result & ASUS_WMI_DSTS_PRESENCE_BIT;
}
static void asus_wmi_led_exit(struct asus_wmi *asus)
{
if (!IS_ERR_OR_NULL(asus->kbd_led.dev))
led_classdev_unregister(&asus->kbd_led);
if (!IS_ERR_OR_NULL(asus->tpd_led.dev))
led_classdev_unregister(&asus->tpd_led);
if (!IS_ERR_OR_NULL(asus->wlan_led.dev))
led_classdev_unregister(&asus->wlan_led);
if (!IS_ERR_OR_NULL(asus->lightbar_led.dev))
led_classdev_unregister(&asus->lightbar_led);
if (asus->led_workqueue)
destroy_workqueue(asus->led_workqueue);
}
static int asus_wmi_led_init(struct asus_wmi *asus)
{
int rv = 0, led_val;
asus->led_workqueue = create_singlethread_workqueue("led_workqueue");
if (!asus->led_workqueue)
return -ENOMEM;
if (read_tpd_led_state(asus) >= 0) {
INIT_WORK(&asus->tpd_led_work, tpd_led_update);
asus->tpd_led.name = "asus::touchpad";
asus->tpd_led.brightness_set = tpd_led_set;
asus->tpd_led.brightness_get = tpd_led_get;
asus->tpd_led.max_brightness = 1;
rv = led_classdev_register(&asus->platform_device->dev,
&asus->tpd_led);
if (rv)
goto error;
}
led_val = kbd_led_read(asus, NULL, NULL);
if (led_val >= 0) {
asus->kbd_led_wk = led_val;
asus->kbd_led.name = "asus::kbd_backlight";
asus->kbd_led.flags = LED_BRIGHT_HW_CHANGED;
asus->kbd_led.brightness_set = kbd_led_set;
asus->kbd_led.brightness_get = kbd_led_get;
asus->kbd_led.max_brightness = 3;
rv = led_classdev_register(&asus->platform_device->dev,
&asus->kbd_led);
if (rv)
goto error;
}
if (wlan_led_presence(asus) && (asus->driver->quirks->wapf > 0)) {
INIT_WORK(&asus->wlan_led_work, wlan_led_update);
asus->wlan_led.name = "asus::wlan";
asus->wlan_led.brightness_set = wlan_led_set;
if (!wlan_led_unknown_state(asus))
asus->wlan_led.brightness_get = wlan_led_get;
asus->wlan_led.flags = LED_CORE_SUSPENDRESUME;
asus->wlan_led.max_brightness = 1;
asus->wlan_led.default_trigger = "asus-wlan";
rv = led_classdev_register(&asus->platform_device->dev,
&asus->wlan_led);
if (rv)
goto error;
}
if (lightbar_led_presence(asus)) {
INIT_WORK(&asus->lightbar_led_work, lightbar_led_update);
asus->lightbar_led.name = "asus::lightbar";
asus->lightbar_led.brightness_set = lightbar_led_set;
asus->lightbar_led.brightness_get = lightbar_led_get;
asus->lightbar_led.max_brightness = 1;
rv = led_classdev_register(&asus->platform_device->dev,
&asus->lightbar_led);
}
error:
if (rv)
asus_wmi_led_exit(asus);
return rv;
}
/*
* PCI hotplug (for wlan rfkill)
*/
static bool asus_wlan_rfkill_blocked(struct asus_wmi *asus)
{
int result = asus_wmi_get_devstate_simple(asus, ASUS_WMI_DEVID_WLAN);
if (result < 0)
return false;
return !result;
}
static void asus_rfkill_hotplug(struct asus_wmi *asus)
{
struct pci_dev *dev;
struct pci_bus *bus;
bool blocked;
bool absent;
u32 l;
mutex_lock(&asus->wmi_lock);
blocked = asus_wlan_rfkill_blocked(asus);
mutex_unlock(&asus->wmi_lock);
mutex_lock(&asus->hotplug_lock);
pci_lock_rescan_remove();
if (asus->wlan.rfkill)
rfkill_set_sw_state(asus->wlan.rfkill, blocked);
if (asus->hotplug_slot.ops) {
bus = pci_find_bus(0, 1);
if (!bus) {
pr_warn("Unable to find PCI bus 1?\n");
goto out_unlock;
}
if (pci_bus_read_config_dword(bus, 0, PCI_VENDOR_ID, &l)) {
pr_err("Unable to read PCI config space?\n");
goto out_unlock;
}
absent = (l == 0xffffffff);
if (blocked != absent) {
pr_warn("BIOS says wireless lan is %s, "
"but the pci device is %s\n",
blocked ? "blocked" : "unblocked",
absent ? "absent" : "present");
pr_warn("skipped wireless hotplug as probably "
"inappropriate for this model\n");
goto out_unlock;
}
if (!blocked) {
dev = pci_get_slot(bus, 0);
if (dev) {
/* Device already present */
pci_dev_put(dev);
goto out_unlock;
}
dev = pci_scan_single_device(bus, 0);
if (dev) {
pci_bus_assign_resources(bus);
pci_bus_add_device(dev);
}
} else {
dev = pci_get_slot(bus, 0);
if (dev) {
pci_stop_and_remove_bus_device(dev);
pci_dev_put(dev);
}
}
}
out_unlock:
pci_unlock_rescan_remove();
mutex_unlock(&asus->hotplug_lock);
}
static void asus_rfkill_notify(acpi_handle handle, u32 event, void *data)
{
struct asus_wmi *asus = data;
if (event != ACPI_NOTIFY_BUS_CHECK)
return;
/*
* We can't call directly asus_rfkill_hotplug because most
* of the time WMBC is still being executed and not reetrant.
* There is currently no way to tell ACPICA that we want this
* method to be serialized, we schedule a asus_rfkill_hotplug
* call later, in a safer context.
*/
queue_work(asus->hotplug_workqueue, &asus->hotplug_work);
}
static int asus_register_rfkill_notifier(struct asus_wmi *asus, char *node)
{
acpi_status status;
acpi_handle handle;
status = acpi_get_handle(NULL, node, &handle);
if (ACPI_SUCCESS(status)) {
status = acpi_install_notify_handler(handle,
ACPI_SYSTEM_NOTIFY,
asus_rfkill_notify, asus);
if (ACPI_FAILURE(status))
pr_warn("Failed to register notify on %s\n", node);
} else
return -ENODEV;
return 0;
}
static void asus_unregister_rfkill_notifier(struct asus_wmi *asus, char *node)
{
acpi_status status = AE_OK;
acpi_handle handle;
status = acpi_get_handle(NULL, node, &handle);
if (ACPI_SUCCESS(status)) {
status = acpi_remove_notify_handler(handle,
ACPI_SYSTEM_NOTIFY,
asus_rfkill_notify);
if (ACPI_FAILURE(status))
pr_err("Error removing rfkill notify handler %s\n",
node);
}
}
static int asus_get_adapter_status(struct hotplug_slot *hotplug_slot,
u8 *value)
{
struct asus_wmi *asus = container_of(hotplug_slot,
struct asus_wmi, hotplug_slot);
int result = asus_wmi_get_devstate_simple(asus, ASUS_WMI_DEVID_WLAN);
if (result < 0)
return result;
*value = !!result;
return 0;
}
static const struct hotplug_slot_ops asus_hotplug_slot_ops = {
.get_adapter_status = asus_get_adapter_status,
.get_power_status = asus_get_adapter_status,
};
static void asus_hotplug_work(struct work_struct *work)
{
struct asus_wmi *asus;
asus = container_of(work, struct asus_wmi, hotplug_work);
asus_rfkill_hotplug(asus);
}
static int asus_setup_pci_hotplug(struct asus_wmi *asus)
{
int ret = -ENOMEM;
struct pci_bus *bus = pci_find_bus(0, 1);
if (!bus) {
pr_err("Unable to find wifi PCI bus\n");
return -ENODEV;
}
asus->hotplug_workqueue =
create_singlethread_workqueue("hotplug_workqueue");
if (!asus->hotplug_workqueue)
goto error_workqueue;
INIT_WORK(&asus->hotplug_work, asus_hotplug_work);
asus->hotplug_slot.ops = &asus_hotplug_slot_ops;
ret = pci_hp_register(&asus->hotplug_slot, bus, 0, "asus-wifi");
if (ret) {
pr_err("Unable to register hotplug slot - %d\n", ret);
goto error_register;
}
return 0;
error_register:
asus->hotplug_slot.ops = NULL;
destroy_workqueue(asus->hotplug_workqueue);
error_workqueue:
return ret;
}
/*
* Rfkill devices
*/
static int asus_rfkill_set(void *data, bool blocked)
{
struct asus_rfkill *priv = data;
u32 ctrl_param = !blocked;
u32 dev_id = priv->dev_id;
/*
* If the user bit is set, BIOS can't set and record the wlan status,
* it will report the value read from id ASUS_WMI_DEVID_WLAN_LED
* while we query the wlan status through WMI(ASUS_WMI_DEVID_WLAN).
* So, we have to record wlan status in id ASUS_WMI_DEVID_WLAN_LED
* while setting the wlan status through WMI.
* This is also the behavior that windows app will do.
*/
if ((dev_id == ASUS_WMI_DEVID_WLAN) &&
priv->asus->driver->wlan_ctrl_by_user)
dev_id = ASUS_WMI_DEVID_WLAN_LED;
return asus_wmi_set_devstate(dev_id, ctrl_param, NULL);
}
static void asus_rfkill_query(struct rfkill *rfkill, void *data)
{
struct asus_rfkill *priv = data;
int result;
result = asus_wmi_get_devstate_simple(priv->asus, priv->dev_id);
if (result < 0)
return;
rfkill_set_sw_state(priv->rfkill, !result);
}
static int asus_rfkill_wlan_set(void *data, bool blocked)
{
struct asus_rfkill *priv = data;
struct asus_wmi *asus = priv->asus;
int ret;
/*
* This handler is enabled only if hotplug is enabled.
* In this case, the asus_wmi_set_devstate() will
* trigger a wmi notification and we need to wait
* this call to finish before being able to call
* any wmi method
*/
mutex_lock(&asus->wmi_lock);
ret = asus_rfkill_set(data, blocked);
mutex_unlock(&asus->wmi_lock);
return ret;
}
static const struct rfkill_ops asus_rfkill_wlan_ops = {
.set_block = asus_rfkill_wlan_set,
.query = asus_rfkill_query,
};
static const struct rfkill_ops asus_rfkill_ops = {
.set_block = asus_rfkill_set,
.query = asus_rfkill_query,
};
static int asus_new_rfkill(struct asus_wmi *asus,
struct asus_rfkill *arfkill,
const char *name, enum rfkill_type type, int dev_id)
{
int result = asus_wmi_get_devstate_simple(asus, dev_id);
struct rfkill **rfkill = &arfkill->rfkill;
if (result < 0)
return result;
arfkill->dev_id = dev_id;
arfkill->asus = asus;
if (dev_id == ASUS_WMI_DEVID_WLAN &&
asus->driver->quirks->hotplug_wireless)
*rfkill = rfkill_alloc(name, &asus->platform_device->dev, type,
&asus_rfkill_wlan_ops, arfkill);
else
*rfkill = rfkill_alloc(name, &asus->platform_device->dev, type,
&asus_rfkill_ops, arfkill);
if (!*rfkill)
return -EINVAL;
if ((dev_id == ASUS_WMI_DEVID_WLAN) &&
(asus->driver->quirks->wapf > 0))
rfkill_set_led_trigger_name(*rfkill, "asus-wlan");
rfkill_init_sw_state(*rfkill, !result);
result = rfkill_register(*rfkill);
if (result) {
rfkill_destroy(*rfkill);
*rfkill = NULL;
return result;
}
return 0;
}
static void asus_wmi_rfkill_exit(struct asus_wmi *asus)
{
if (asus->driver->wlan_ctrl_by_user && ashs_present())
return;
asus_unregister_rfkill_notifier(asus, "\\_SB.PCI0.P0P5");
asus_unregister_rfkill_notifier(asus, "\\_SB.PCI0.P0P6");
asus_unregister_rfkill_notifier(asus, "\\_SB.PCI0.P0P7");
if (asus->wlan.rfkill) {
rfkill_unregister(asus->wlan.rfkill);
rfkill_destroy(asus->wlan.rfkill);
asus->wlan.rfkill = NULL;
}
/*
* Refresh pci hotplug in case the rfkill state was changed after
* asus_unregister_rfkill_notifier()
*/
asus_rfkill_hotplug(asus);
if (asus->hotplug_slot.ops)
pci_hp_deregister(&asus->hotplug_slot);
if (asus->hotplug_workqueue)
destroy_workqueue(asus->hotplug_workqueue);
if (asus->bluetooth.rfkill) {
rfkill_unregister(asus->bluetooth.rfkill);
rfkill_destroy(asus->bluetooth.rfkill);
asus->bluetooth.rfkill = NULL;
}
if (asus->wimax.rfkill) {
rfkill_unregister(asus->wimax.rfkill);
rfkill_destroy(asus->wimax.rfkill);
asus->wimax.rfkill = NULL;
}
if (asus->wwan3g.rfkill) {
rfkill_unregister(asus->wwan3g.rfkill);
rfkill_destroy(asus->wwan3g.rfkill);
asus->wwan3g.rfkill = NULL;
}
if (asus->gps.rfkill) {
rfkill_unregister(asus->gps.rfkill);
rfkill_destroy(asus->gps.rfkill);
asus->gps.rfkill = NULL;
}
if (asus->uwb.rfkill) {
rfkill_unregister(asus->uwb.rfkill);
rfkill_destroy(asus->uwb.rfkill);
asus->uwb.rfkill = NULL;
}
}
static int asus_wmi_rfkill_init(struct asus_wmi *asus)
{
int result = 0;
mutex_init(&asus->hotplug_lock);
mutex_init(&asus->wmi_lock);
result = asus_new_rfkill(asus, &asus->wlan, "asus-wlan",
RFKILL_TYPE_WLAN, ASUS_WMI_DEVID_WLAN);
if (result && result != -ENODEV)
goto exit;
result = asus_new_rfkill(asus, &asus->bluetooth,
"asus-bluetooth", RFKILL_TYPE_BLUETOOTH,
ASUS_WMI_DEVID_BLUETOOTH);
if (result && result != -ENODEV)
goto exit;
result = asus_new_rfkill(asus, &asus->wimax, "asus-wimax",
RFKILL_TYPE_WIMAX, ASUS_WMI_DEVID_WIMAX);
if (result && result != -ENODEV)
goto exit;
result = asus_new_rfkill(asus, &asus->wwan3g, "asus-wwan3g",
RFKILL_TYPE_WWAN, ASUS_WMI_DEVID_WWAN3G);
if (result && result != -ENODEV)
goto exit;
result = asus_new_rfkill(asus, &asus->gps, "asus-gps",
RFKILL_TYPE_GPS, ASUS_WMI_DEVID_GPS);
if (result && result != -ENODEV)
goto exit;
result = asus_new_rfkill(asus, &asus->uwb, "asus-uwb",
RFKILL_TYPE_UWB, ASUS_WMI_DEVID_UWB);
if (result && result != -ENODEV)
goto exit;
if (!asus->driver->quirks->hotplug_wireless)
goto exit;
result = asus_setup_pci_hotplug(asus);
/*
* If we get -EBUSY then something else is handling the PCI hotplug -
* don't fail in this case
*/
if (result == -EBUSY)
result = 0;
asus_register_rfkill_notifier(asus, "\\_SB.PCI0.P0P5");
asus_register_rfkill_notifier(asus, "\\_SB.PCI0.P0P6");
asus_register_rfkill_notifier(asus, "\\_SB.PCI0.P0P7");
/*
* Refresh pci hotplug in case the rfkill state was changed during
* setup.
*/
asus_rfkill_hotplug(asus);
exit:
if (result && result != -ENODEV)
asus_wmi_rfkill_exit(asus);
if (result == -ENODEV)
result = 0;
return result;
}
static void asus_wmi_set_xusb2pr(struct asus_wmi *asus)
{
struct pci_dev *xhci_pdev;
u32 orig_ports_available;
u32 ports_available = asus->driver->quirks->xusb2pr;
xhci_pdev = pci_get_device(PCI_VENDOR_ID_INTEL,
PCI_DEVICE_ID_INTEL_LYNXPOINT_LP_XHCI,
NULL);
if (!xhci_pdev)
return;
pci_read_config_dword(xhci_pdev, USB_INTEL_XUSB2PR,
&orig_ports_available);
pci_write_config_dword(xhci_pdev, USB_INTEL_XUSB2PR,
cpu_to_le32(ports_available));
pr_info("set USB_INTEL_XUSB2PR old: 0x%04x, new: 0x%04x\n",
orig_ports_available, ports_available);
}
/*
* Some devices dont support or have borcken get_als method
* but still support set method.
*/
static void asus_wmi_set_als(void)
{
asus_wmi_set_devstate(ASUS_WMI_DEVID_ALS_ENABLE, 1, NULL);
}
/*
* Hwmon device
*/
static int asus_hwmon_agfn_fan_speed_read(struct asus_wmi *asus, int fan,
int *speed)
{
struct fan_args args = {
.agfn.len = sizeof(args),
.agfn.mfun = ASUS_FAN_MFUN,
.agfn.sfun = ASUS_FAN_SFUN_READ,
.fan = fan,
.speed = 0,
};
struct acpi_buffer input = { (acpi_size) sizeof(args), &args };
int status;
if (fan != 1)
return -EINVAL;
status = asus_wmi_evaluate_method_agfn(input);
if (status || args.agfn.err)
return -ENXIO;
if (speed)
*speed = args.speed;
return 0;
}
static int asus_hwmon_agfn_fan_speed_write(struct asus_wmi *asus, int fan,
int *speed)
{
struct fan_args args = {
.agfn.len = sizeof(args),
.agfn.mfun = ASUS_FAN_MFUN,
.agfn.sfun = ASUS_FAN_SFUN_WRITE,
.fan = fan,
.speed = speed ? *speed : 0,
};
struct acpi_buffer input = { (acpi_size) sizeof(args), &args };
int status;
/* 1: for setting 1st fan's speed 0: setting auto mode */
if (fan != 1 && fan != 0)
return -EINVAL;
status = asus_wmi_evaluate_method_agfn(input);
if (status || args.agfn.err)
return -ENXIO;
if (speed && fan == 1)
asus->asus_hwmon_pwm = *speed;
return 0;
}
/*
* Check if we can read the speed of one fan. If true we assume we can also
* control it.
*/
static int asus_hwmon_get_fan_number(struct asus_wmi *asus, int *num_fans)
{
int status;
int speed = 0;
*num_fans = 0;
status = asus_hwmon_agfn_fan_speed_read(asus, 1, &speed);
if (!status)
*num_fans = 1;
return 0;
}
static int asus_hwmon_fan_set_auto(struct asus_wmi *asus)
{
int status;
status = asus_hwmon_agfn_fan_speed_write(asus, 0, NULL);
if (status)
return -ENXIO;
asus->asus_hwmon_fan_manual_mode = false;
return 0;
}
static int asus_hwmon_fan_rpm_show(struct device *dev, int fan)
{
struct asus_wmi *asus = dev_get_drvdata(dev);
int value;
int ret;
/* no speed readable on manual mode */
if (asus->asus_hwmon_fan_manual_mode)
return -ENXIO;
ret = asus_hwmon_agfn_fan_speed_read(asus, fan+1, &value);
if (ret) {
pr_warn("reading fan speed failed: %d\n", ret);
return -ENXIO;
}
return value;
}
static void asus_hwmon_pwm_show(struct asus_wmi *asus, int fan, int *value)
{
int err;
if (asus->asus_hwmon_pwm >= 0) {
*value = asus->asus_hwmon_pwm;
return;
}
err = asus_wmi_get_devstate(asus, ASUS_WMI_DEVID_FAN_CTRL, value);
if (err < 0)
return;
*value &= 0xFF;
if (*value == 1) /* Low Speed */
*value = 85;
else if (*value == 2)
*value = 170;
else if (*value == 3)
*value = 255;
else if (*value) {
pr_err("Unknown fan speed %#x\n", *value);
*value = -1;
}
}
static ssize_t pwm1_show(struct device *dev,
struct device_attribute *attr,
char *buf)
{
struct asus_wmi *asus = dev_get_drvdata(dev);
int value;
asus_hwmon_pwm_show(asus, 0, &value);
return sprintf(buf, "%d\n", value);
}
static ssize_t pwm1_store(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count) {
struct asus_wmi *asus = dev_get_drvdata(dev);
int value;
int state;
int ret;
ret = kstrtouint(buf, 10, &value);
if (ret)
return ret;
value = clamp(value, 0, 255);
state = asus_hwmon_agfn_fan_speed_write(asus, 1, &value);
if (state)
pr_warn("Setting fan speed failed: %d\n", state);
else
asus->asus_hwmon_fan_manual_mode = true;
return count;
}
static ssize_t fan1_input_show(struct device *dev,
struct device_attribute *attr,
char *buf)
{
int value = asus_hwmon_fan_rpm_show(dev, 0);
return sprintf(buf, "%d\n", value < 0 ? -1 : value*100);
}
static ssize_t pwm1_enable_show(struct device *dev,
struct device_attribute *attr,
char *buf)
{
struct asus_wmi *asus = dev_get_drvdata(dev);
if (asus->asus_hwmon_fan_manual_mode)
return sprintf(buf, "%d\n", ASUS_FAN_CTRL_MANUAL);
return sprintf(buf, "%d\n", ASUS_FAN_CTRL_AUTO);
}
static ssize_t pwm1_enable_store(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
struct asus_wmi *asus = dev_get_drvdata(dev);
int status = 0;
int state;
int ret;
ret = kstrtouint(buf, 10, &state);
if (ret)
return ret;
if (state == ASUS_FAN_CTRL_MANUAL)
asus->asus_hwmon_fan_manual_mode = true;
else
status = asus_hwmon_fan_set_auto(asus);
if (status)
return status;
return count;
}
static ssize_t fan1_label_show(struct device *dev,
struct device_attribute *attr,
char *buf)
{
return sprintf(buf, "%s\n", ASUS_FAN_DESC);
}
static ssize_t asus_hwmon_temp1(struct device *dev,
struct device_attribute *attr,
char *buf)
{
struct asus_wmi *asus = dev_get_drvdata(dev);
u32 value;
int err;
err = asus_wmi_get_devstate(asus, ASUS_WMI_DEVID_THERMAL_CTRL, &value);
if (err < 0)
return err;
value = DECI_KELVIN_TO_CELSIUS((value & 0xFFFF)) * 1000;
return sprintf(buf, "%d\n", value);
}
/* Fan1 */
static DEVICE_ATTR_RW(pwm1);
static DEVICE_ATTR_RW(pwm1_enable);
static DEVICE_ATTR_RO(fan1_input);
static DEVICE_ATTR_RO(fan1_label);
/* Temperature */
static DEVICE_ATTR(temp1_input, S_IRUGO, asus_hwmon_temp1, NULL);
static struct attribute *hwmon_attributes[] = {
&dev_attr_pwm1.attr,
&dev_attr_pwm1_enable.attr,
&dev_attr_fan1_input.attr,
&dev_attr_fan1_label.attr,
&dev_attr_temp1_input.attr,
NULL
};
static umode_t asus_hwmon_sysfs_is_visible(struct kobject *kobj,
struct attribute *attr, int idx)
{
struct device *dev = container_of(kobj, struct device, kobj);
struct platform_device *pdev = to_platform_device(dev->parent);
struct asus_wmi *asus = platform_get_drvdata(pdev);
int dev_id = -1;
int fan_attr = -1;
u32 value = ASUS_WMI_UNSUPPORTED_METHOD;
bool ok = true;
if (attr == &dev_attr_pwm1.attr)
dev_id = ASUS_WMI_DEVID_FAN_CTRL;
else if (attr == &dev_attr_temp1_input.attr)
dev_id = ASUS_WMI_DEVID_THERMAL_CTRL;
if (attr == &dev_attr_fan1_input.attr
|| attr == &dev_attr_fan1_label.attr
|| attr == &dev_attr_pwm1.attr
|| attr == &dev_attr_pwm1_enable.attr) {
fan_attr = 1;
}
if (dev_id != -1) {
int err = asus_wmi_get_devstate(asus, dev_id, &value);
if (err < 0 && fan_attr == -1)
return 0; /* can't return negative here */
}
if (dev_id == ASUS_WMI_DEVID_FAN_CTRL) {
/*
* We need to find a better way, probably using sfun,
* bits or spec ...
* Currently we disable it if:
* - ASUS_WMI_UNSUPPORTED_METHOD is returned
* - reverved bits are non-zero
* - sfun and presence bit are not set
*/
if (value == ASUS_WMI_UNSUPPORTED_METHOD || value & 0xFFF80000
|| (!asus->sfun && !(value & ASUS_WMI_DSTS_PRESENCE_BIT)))
ok = false;
else
ok = fan_attr <= asus->asus_hwmon_num_fans;
} else if (dev_id == ASUS_WMI_DEVID_THERMAL_CTRL) {
/* If value is zero, something is clearly wrong */
if (!value)
ok = false;
} else if (fan_attr <= asus->asus_hwmon_num_fans && fan_attr != -1) {
ok = true;
} else {
ok = false;
}
return ok ? attr->mode : 0;
}
static const struct attribute_group hwmon_attribute_group = {
.is_visible = asus_hwmon_sysfs_is_visible,
.attrs = hwmon_attributes
};
__ATTRIBUTE_GROUPS(hwmon_attribute);
static int asus_wmi_hwmon_init(struct asus_wmi *asus)
{
struct device *hwmon;
hwmon = hwmon_device_register_with_groups(&asus->platform_device->dev,
"asus", asus,
hwmon_attribute_groups);
if (IS_ERR(hwmon)) {
pr_err("Could not register asus hwmon device\n");
return PTR_ERR(hwmon);
}
return 0;
}
/*
* Backlight
*/
static int read_backlight_power(struct asus_wmi *asus)
{
int ret;
if (asus->driver->quirks->store_backlight_power)
ret = !asus->driver->panel_power;
else
ret = asus_wmi_get_devstate_simple(asus,
ASUS_WMI_DEVID_BACKLIGHT);
if (ret < 0)
return ret;
return ret ? FB_BLANK_UNBLANK : FB_BLANK_POWERDOWN;
}
static int read_brightness_max(struct asus_wmi *asus)
{
u32 retval;
int err;
err = asus_wmi_get_devstate(asus, ASUS_WMI_DEVID_BRIGHTNESS, &retval);
if (err < 0)
return err;
retval = retval & ASUS_WMI_DSTS_MAX_BRIGTH_MASK;
retval >>= 8;
if (!retval)
return -ENODEV;
return retval;
}
static int read_brightness(struct backlight_device *bd)
{
struct asus_wmi *asus = bl_get_data(bd);
u32 retval;
int err;
err = asus_wmi_get_devstate(asus, ASUS_WMI_DEVID_BRIGHTNESS, &retval);
if (err < 0)
return err;
return retval & ASUS_WMI_DSTS_BRIGHTNESS_MASK;
}
static u32 get_scalar_command(struct backlight_device *bd)
{
struct asus_wmi *asus = bl_get_data(bd);
u32 ctrl_param = 0;
if ((asus->driver->brightness < bd->props.brightness) ||
bd->props.brightness == bd->props.max_brightness)
ctrl_param = 0x00008001;
else if ((asus->driver->brightness > bd->props.brightness) ||
bd->props.brightness == 0)
ctrl_param = 0x00008000;
asus->driver->brightness = bd->props.brightness;
return ctrl_param;
}
static int update_bl_status(struct backlight_device *bd)
{
struct asus_wmi *asus = bl_get_data(bd);
u32 ctrl_param;
int power, err = 0;
power = read_backlight_power(asus);
if (power != -ENODEV && bd->props.power != power) {
ctrl_param = !!(bd->props.power == FB_BLANK_UNBLANK);
err = asus_wmi_set_devstate(ASUS_WMI_DEVID_BACKLIGHT,
ctrl_param, NULL);
if (asus->driver->quirks->store_backlight_power)
asus->driver->panel_power = bd->props.power;
/* When using scalar brightness, updating the brightness
* will mess with the backlight power */
if (asus->driver->quirks->scalar_panel_brightness)
return err;
}
if (asus->driver->quirks->scalar_panel_brightness)
ctrl_param = get_scalar_command(bd);
else
ctrl_param = bd->props.brightness;
err = asus_wmi_set_devstate(ASUS_WMI_DEVID_BRIGHTNESS,
ctrl_param, NULL);
return err;
}
static const struct backlight_ops asus_wmi_bl_ops = {
.get_brightness = read_brightness,
.update_status = update_bl_status,
};
static int asus_wmi_backlight_notify(struct asus_wmi *asus, int code)
{
struct backlight_device *bd = asus->backlight_device;
int old = bd->props.brightness;
int new = old;
if (code >= NOTIFY_BRNUP_MIN && code <= NOTIFY_BRNUP_MAX)
new = code - NOTIFY_BRNUP_MIN + 1;
else if (code >= NOTIFY_BRNDOWN_MIN && code <= NOTIFY_BRNDOWN_MAX)
new = code - NOTIFY_BRNDOWN_MIN;
bd->props.brightness = new;
backlight_update_status(bd);
backlight_force_update(bd, BACKLIGHT_UPDATE_HOTKEY);
return old;
}
static int asus_wmi_backlight_init(struct asus_wmi *asus)
{
struct backlight_device *bd;
struct backlight_properties props;
int max;
int power;
max = read_brightness_max(asus);
if (max < 0)
return max;
power = read_backlight_power(asus);
if (power == -ENODEV)
power = FB_BLANK_UNBLANK;
else if (power < 0)
return power;
memset(&props, 0, sizeof(struct backlight_properties));
props.type = BACKLIGHT_PLATFORM;
props.max_brightness = max;
bd = backlight_device_register(asus->driver->name,
&asus->platform_device->dev, asus,
&asus_wmi_bl_ops, &props);
if (IS_ERR(bd)) {
pr_err("Could not register backlight device\n");
return PTR_ERR(bd);
}
asus->backlight_device = bd;
if (asus->driver->quirks->store_backlight_power)
asus->driver->panel_power = power;
bd->props.brightness = read_brightness(bd);
bd->props.power = power;
backlight_update_status(bd);
asus->driver->brightness = bd->props.brightness;
return 0;
}
static void asus_wmi_backlight_exit(struct asus_wmi *asus)
{
backlight_device_unregister(asus->backlight_device);
asus->backlight_device = NULL;
}
static int is_display_toggle(int code)
{
/* display toggle keys */
if ((code >= 0x61 && code <= 0x67) ||
(code >= 0x8c && code <= 0x93) ||
(code >= 0xa0 && code <= 0xa7) ||
(code >= 0xd0 && code <= 0xd5))
return 1;
return 0;
}
static void asus_wmi_notify(u32 value, void *context)
{
struct asus_wmi *asus = context;
struct acpi_buffer response = { ACPI_ALLOCATE_BUFFER, NULL };
union acpi_object *obj;
acpi_status status;
int code;
int orig_code;
unsigned int key_value = 1;
bool autorelease = 1;
status = wmi_get_event_data(value, &response);
if (status != AE_OK) {
pr_err("bad event status 0x%x\n", status);
return;
}
obj = (union acpi_object *)response.pointer;
if (!obj || obj->type != ACPI_TYPE_INTEGER)
goto exit;
code = obj->integer.value;
orig_code = code;
if (asus->driver->key_filter) {
asus->driver->key_filter(asus->driver, &code, &key_value,
&autorelease);
if (code == ASUS_WMI_KEY_IGNORE)
goto exit;
}
if (code >= NOTIFY_BRNUP_MIN && code <= NOTIFY_BRNUP_MAX)
code = ASUS_WMI_BRN_UP;
else if (code >= NOTIFY_BRNDOWN_MIN &&
code <= NOTIFY_BRNDOWN_MAX)
code = ASUS_WMI_BRN_DOWN;
if (code == ASUS_WMI_BRN_DOWN || code == ASUS_WMI_BRN_UP) {
if (acpi_video_get_backlight_type() == acpi_backlight_vendor) {
asus_wmi_backlight_notify(asus, orig_code);
goto exit;
}
}
if (code == NOTIFY_KBD_BRTUP) {
kbd_led_set_by_kbd(asus, asus->kbd_led_wk + 1);
goto exit;
}
if (code == NOTIFY_KBD_BRTDWN) {
kbd_led_set_by_kbd(asus, asus->kbd_led_wk - 1);
goto exit;
}
if (code == NOTIFY_KBD_BRTTOGGLE) {
if (asus->kbd_led_wk == asus->kbd_led.max_brightness)
kbd_led_set_by_kbd(asus, 0);
else
kbd_led_set_by_kbd(asus, asus->kbd_led_wk + 1);
goto exit;
}
if (is_display_toggle(code) &&
asus->driver->quirks->no_display_toggle)
goto exit;
if (!sparse_keymap_report_event(asus->inputdev, code,
key_value, autorelease))
pr_info("Unknown key %x pressed\n", code);
exit:
kfree(obj);
}
/*
* Sys helpers
*/
static int parse_arg(const char *buf, unsigned long count, int *val)
{
if (!count)
return 0;
if (sscanf(buf, "%i", val) != 1)
return -EINVAL;
return count;
}
static ssize_t store_sys_wmi(struct asus_wmi *asus, int devid,
const char *buf, size_t count)
{
u32 retval;
int rv, err, value;
value = asus_wmi_get_devstate_simple(asus, devid);
if (value < 0)
return value;
rv = parse_arg(buf, count, &value);
err = asus_wmi_set_devstate(devid, value, &retval);
if (err < 0)
return err;
return rv;
}
static ssize_t show_sys_wmi(struct asus_wmi *asus, int devid, char *buf)
{
int value = asus_wmi_get_devstate_simple(asus, devid);
if (value < 0)
return value;
return sprintf(buf, "%d\n", value);
}
#define ASUS_WMI_CREATE_DEVICE_ATTR(_name, _mode, _cm) \
static ssize_t show_##_name(struct device *dev, \
struct device_attribute *attr, \
char *buf) \
{ \
struct asus_wmi *asus = dev_get_drvdata(dev); \
\
return show_sys_wmi(asus, _cm, buf); \
} \
static ssize_t store_##_name(struct device *dev, \
struct device_attribute *attr, \
const char *buf, size_t count) \
{ \
struct asus_wmi *asus = dev_get_drvdata(dev); \
\
return store_sys_wmi(asus, _cm, buf, count); \
} \
static struct device_attribute dev_attr_##_name = { \
.attr = { \
.name = __stringify(_name), \
.mode = _mode }, \
.show = show_##_name, \
.store = store_##_name, \
}
ASUS_WMI_CREATE_DEVICE_ATTR(touchpad, 0644, ASUS_WMI_DEVID_TOUCHPAD);
ASUS_WMI_CREATE_DEVICE_ATTR(camera, 0644, ASUS_WMI_DEVID_CAMERA);
ASUS_WMI_CREATE_DEVICE_ATTR(cardr, 0644, ASUS_WMI_DEVID_CARDREADER);
ASUS_WMI_CREATE_DEVICE_ATTR(lid_resume, 0644, ASUS_WMI_DEVID_LID_RESUME);
ASUS_WMI_CREATE_DEVICE_ATTR(als_enable, 0644, ASUS_WMI_DEVID_ALS_ENABLE);
static ssize_t cpufv_store(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
{
int value, rv;
if (!count || sscanf(buf, "%i", &value) != 1)
return -EINVAL;
if (value < 0 || value > 2)
return -EINVAL;
rv = asus_wmi_evaluate_method(ASUS_WMI_METHODID_CFVS, value, 0, NULL);
if (rv < 0)
return rv;
return count;
}
static DEVICE_ATTR_WO(cpufv);
static struct attribute *platform_attributes[] = {
&dev_attr_cpufv.attr,
&dev_attr_camera.attr,
&dev_attr_cardr.attr,
&dev_attr_touchpad.attr,
&dev_attr_lid_resume.attr,
&dev_attr_als_enable.attr,
NULL
};
static umode_t asus_sysfs_is_visible(struct kobject *kobj,
struct attribute *attr, int idx)
{
struct device *dev = container_of(kobj, struct device, kobj);
struct asus_wmi *asus = dev_get_drvdata(dev);
bool ok = true;
int devid = -1;
if (attr == &dev_attr_camera.attr)
devid = ASUS_WMI_DEVID_CAMERA;
else if (attr == &dev_attr_cardr.attr)
devid = ASUS_WMI_DEVID_CARDREADER;
else if (attr == &dev_attr_touchpad.attr)
devid = ASUS_WMI_DEVID_TOUCHPAD;
else if (attr == &dev_attr_lid_resume.attr)
devid = ASUS_WMI_DEVID_LID_RESUME;
else if (attr == &dev_attr_als_enable.attr)
devid = ASUS_WMI_DEVID_ALS_ENABLE;
if (devid != -1)
ok = !(asus_wmi_get_devstate_simple(asus, devid) < 0);
return ok ? attr->mode : 0;
}
static const struct attribute_group platform_attribute_group = {
.is_visible = asus_sysfs_is_visible,
.attrs = platform_attributes
};
static void asus_wmi_sysfs_exit(struct platform_device *device)
{
sysfs_remove_group(&device->dev.kobj, &platform_attribute_group);
}
static int asus_wmi_sysfs_init(struct platform_device *device)
{
return sysfs_create_group(&device->dev.kobj, &platform_attribute_group);
}
/*
* Platform device
*/
static int asus_wmi_platform_init(struct asus_wmi *asus)
{
int rv;
/* INIT enable hotkeys on some models */
if (!asus_wmi_evaluate_method(ASUS_WMI_METHODID_INIT, 0, 0, &rv))
pr_info("Initialization: %#x\n", rv);
/* We don't know yet what to do with this version... */
if (!asus_wmi_evaluate_method(ASUS_WMI_METHODID_SPEC, 0, 0x9, &rv)) {
pr_info("BIOS WMI version: %d.%d\n", rv >> 16, rv & 0xFF);
asus->spec = rv;
}
/*
* The SFUN method probably allows the original driver to get the list
* of features supported by a given model. For now, 0x0100 or 0x0800
* bit signifies that the laptop is equipped with a Wi-Fi MiniPCI card.
* The significance of others is yet to be found.
*/
if (!asus_wmi_evaluate_method(ASUS_WMI_METHODID_SFUN, 0, 0, &rv)) {
pr_info("SFUN value: %#x\n", rv);
asus->sfun = rv;
}
/*
* Eee PC and Notebooks seems to have different method_id for DSTS,
* but it may also be related to the BIOS's SPEC.
* Note, on most Eeepc, there is no way to check if a method exist
* or note, while on notebooks, they returns 0xFFFFFFFE on failure,
* but once again, SPEC may probably be used for that kind of things.
*/
if (!asus_wmi_evaluate_method(ASUS_WMI_METHODID_DSTS, 0, 0, NULL))
asus->dsts_id = ASUS_WMI_METHODID_DSTS;
else
asus->dsts_id = ASUS_WMI_METHODID_DSTS2;
/* CWAP allow to define the behavior of the Fn+F2 key,
* this method doesn't seems to be present on Eee PCs */
if (asus->driver->quirks->wapf >= 0)
asus_wmi_set_devstate(ASUS_WMI_DEVID_CWAP,
asus->driver->quirks->wapf, NULL);
return asus_wmi_sysfs_init(asus->platform_device);
}
static void asus_wmi_platform_exit(struct asus_wmi *asus)
{
asus_wmi_sysfs_exit(asus->platform_device);
}
/*
* debugfs
*/
struct asus_wmi_debugfs_node {
struct asus_wmi *asus;
char *name;
int (*show) (struct seq_file *m, void *data);
};
static int show_dsts(struct seq_file *m, void *data)
{
struct asus_wmi *asus = m->private;
int err;
u32 retval = -1;
err = asus_wmi_get_devstate(asus, asus->debug.dev_id, &retval);
if (err < 0)
return err;
seq_printf(m, "DSTS(%#x) = %#x\n", asus->debug.dev_id, retval);
return 0;
}
static int show_devs(struct seq_file *m, void *data)
{
struct asus_wmi *asus = m->private;
int err;
u32 retval = -1;
err = asus_wmi_set_devstate(asus->debug.dev_id, asus->debug.ctrl_param,
&retval);
if (err < 0)
return err;
seq_printf(m, "DEVS(%#x, %#x) = %#x\n", asus->debug.dev_id,
asus->debug.ctrl_param, retval);
return 0;
}
static int show_call(struct seq_file *m, void *data)
{
struct asus_wmi *asus = m->private;
struct bios_args args = {
.arg0 = asus->debug.dev_id,
.arg1 = asus->debug.ctrl_param,
};
struct acpi_buffer input = { (acpi_size) sizeof(args), &args };
struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL };
union acpi_object *obj;
acpi_status status;
status = wmi_evaluate_method(ASUS_WMI_MGMT_GUID,
0, asus->debug.method_id,
&input, &output);
if (ACPI_FAILURE(status))
return -EIO;
obj = (union acpi_object *)output.pointer;
if (obj && obj->type == ACPI_TYPE_INTEGER)
seq_printf(m, "%#x(%#x, %#x) = %#x\n", asus->debug.method_id,
asus->debug.dev_id, asus->debug.ctrl_param,
(u32) obj->integer.value);
else
seq_printf(m, "%#x(%#x, %#x) = t:%d\n", asus->debug.method_id,
asus->debug.dev_id, asus->debug.ctrl_param,
obj ? obj->type : -1);
kfree(obj);
return 0;
}
static struct asus_wmi_debugfs_node asus_wmi_debug_files[] = {
{NULL, "devs", show_devs},
{NULL, "dsts", show_dsts},
{NULL, "call", show_call},
};
static int asus_wmi_debugfs_open(struct inode *inode, struct file *file)
{
struct asus_wmi_debugfs_node *node = inode->i_private;
return single_open(file, node->show, node->asus);
}
static const struct file_operations asus_wmi_debugfs_io_ops = {
.owner = THIS_MODULE,
.open = asus_wmi_debugfs_open,
.read = seq_read,
.llseek = seq_lseek,
.release = single_release,
};
static void asus_wmi_debugfs_exit(struct asus_wmi *asus)
{
debugfs_remove_recursive(asus->debug.root);
}
static int asus_wmi_debugfs_init(struct asus_wmi *asus)
{
struct dentry *dent;
int i;
asus->debug.root = debugfs_create_dir(asus->driver->name, NULL);
if (!asus->debug.root) {
pr_err("failed to create debugfs directory\n");
goto error_debugfs;
}
dent = debugfs_create_x32("method_id", S_IRUGO | S_IWUSR,
asus->debug.root, &asus->debug.method_id);
if (!dent)
goto error_debugfs;
dent = debugfs_create_x32("dev_id", S_IRUGO | S_IWUSR,
asus->debug.root, &asus->debug.dev_id);
if (!dent)
goto error_debugfs;
dent = debugfs_create_x32("ctrl_param", S_IRUGO | S_IWUSR,
asus->debug.root, &asus->debug.ctrl_param);
if (!dent)
goto error_debugfs;
for (i = 0; i < ARRAY_SIZE(asus_wmi_debug_files); i++) {
struct asus_wmi_debugfs_node *node = &asus_wmi_debug_files[i];
node->asus = asus;
dent = debugfs_create_file(node->name, S_IFREG | S_IRUGO,
asus->debug.root, node,
&asus_wmi_debugfs_io_ops);
if (!dent) {
pr_err("failed to create debug file: %s\n", node->name);
goto error_debugfs;
}
}
return 0;
error_debugfs:
asus_wmi_debugfs_exit(asus);
return -ENOMEM;
}
static int asus_wmi_fan_init(struct asus_wmi *asus)
{
int status;
asus->asus_hwmon_pwm = -1;
asus->asus_hwmon_num_fans = -1;
asus->asus_hwmon_fan_manual_mode = false;
status = asus_hwmon_get_fan_number(asus, &asus->asus_hwmon_num_fans);
if (status) {
asus->asus_hwmon_num_fans = 0;
pr_warn("Could not determine number of fans: %d\n", status);
return -ENXIO;
}
pr_info("Number of fans: %d\n", asus->asus_hwmon_num_fans);
return 0;
}
/*
* WMI Driver
*/
static int asus_wmi_add(struct platform_device *pdev)
{
struct platform_driver *pdrv = to_platform_driver(pdev->dev.driver);
struct asus_wmi_driver *wdrv = to_asus_wmi_driver(pdrv);
struct asus_wmi *asus;
const char *chassis_type;
acpi_status status;
int err;
u32 result;
asus = kzalloc(sizeof(struct asus_wmi), GFP_KERNEL);
if (!asus)
return -ENOMEM;
asus->driver = wdrv;
asus->platform_device = pdev;
wdrv->platform_device = pdev;
platform_set_drvdata(asus->platform_device, asus);
if (wdrv->detect_quirks)
wdrv->detect_quirks(asus->driver);
err = asus_wmi_platform_init(asus);
if (err)
goto fail_platform;
err = asus_wmi_input_init(asus);
if (err)
goto fail_input;
err = asus_wmi_fan_init(asus); /* probably no problems on error */
asus_hwmon_fan_set_auto(asus);
err = asus_wmi_hwmon_init(asus);
if (err)
goto fail_hwmon;
err = asus_wmi_led_init(asus);
if (err)
goto fail_leds;
asus_wmi_get_devstate(asus, ASUS_WMI_DEVID_WLAN, &result);
if (result & (ASUS_WMI_DSTS_PRESENCE_BIT | ASUS_WMI_DSTS_USER_BIT))
asus->driver->wlan_ctrl_by_user = 1;
if (!(asus->driver->wlan_ctrl_by_user && ashs_present())) {
err = asus_wmi_rfkill_init(asus);
if (err)
goto fail_rfkill;
}
if (asus->driver->quirks->wmi_force_als_set)
asus_wmi_set_als();
/* Some Asus desktop boards export an acpi-video backlight interface,
stop this from showing up */
chassis_type = dmi_get_system_info(DMI_CHASSIS_TYPE);
if (chassis_type && !strcmp(chassis_type, "3"))
acpi_video_set_dmi_backlight_type(acpi_backlight_vendor);
if (asus->driver->quirks->wmi_backlight_power)
acpi_video_set_dmi_backlight_type(acpi_backlight_vendor);
if (asus->driver->quirks->wmi_backlight_native)
acpi_video_set_dmi_backlight_type(acpi_backlight_native);
if (asus->driver->quirks->xusb2pr)
asus_wmi_set_xusb2pr(asus);
if (acpi_video_get_backlight_type() == acpi_backlight_vendor) {
err = asus_wmi_backlight_init(asus);
if (err && err != -ENODEV)
goto fail_backlight;
} else
err = asus_wmi_set_devstate(ASUS_WMI_DEVID_BACKLIGHT, 2, NULL);
status = wmi_install_notify_handler(asus->driver->event_guid,
asus_wmi_notify, asus);
if (ACPI_FAILURE(status)) {
pr_err("Unable to register notify handler - %d\n", status);
err = -ENODEV;
goto fail_wmi_handler;
}
err = asus_wmi_debugfs_init(asus);
if (err)
goto fail_debugfs;
return 0;
fail_debugfs:
wmi_remove_notify_handler(asus->driver->event_guid);
fail_wmi_handler:
asus_wmi_backlight_exit(asus);
fail_backlight:
asus_wmi_rfkill_exit(asus);
fail_rfkill:
asus_wmi_led_exit(asus);
fail_leds:
fail_hwmon:
asus_wmi_input_exit(asus);
fail_input:
asus_wmi_platform_exit(asus);
fail_platform:
kfree(asus);
return err;
}
static int asus_wmi_remove(struct platform_device *device)
{
struct asus_wmi *asus;
asus = platform_get_drvdata(device);
wmi_remove_notify_handler(asus->driver->event_guid);
asus_wmi_backlight_exit(asus);
asus_wmi_input_exit(asus);
asus_wmi_led_exit(asus);
asus_wmi_rfkill_exit(asus);
asus_wmi_debugfs_exit(asus);
asus_wmi_platform_exit(asus);
asus_hwmon_fan_set_auto(asus);
kfree(asus);
return 0;
}
/*
* Platform driver - hibernate/resume callbacks
*/
static int asus_hotk_thaw(struct device *device)
{
struct asus_wmi *asus = dev_get_drvdata(device);
if (asus->wlan.rfkill) {
bool wlan;
/*
* Work around bios bug - acpi _PTS turns off the wireless led
* during suspend. Normally it restores it on resume, but
* we should kick it ourselves in case hibernation is aborted.
*/
wlan = asus_wmi_get_devstate_simple(asus, ASUS_WMI_DEVID_WLAN);
asus_wmi_set_devstate(ASUS_WMI_DEVID_WLAN, wlan, NULL);
}
return 0;
}
static int asus_hotk_resume(struct device *device)
{
struct asus_wmi *asus = dev_get_drvdata(device);
if (!IS_ERR_OR_NULL(asus->kbd_led.dev))
kbd_led_update(asus);
return 0;
}
static int asus_hotk_restore(struct device *device)
{
struct asus_wmi *asus = dev_get_drvdata(device);
int bl;
/* Refresh both wlan rfkill state and pci hotplug */
if (asus->wlan.rfkill)
asus_rfkill_hotplug(asus);
if (asus->bluetooth.rfkill) {
bl = !asus_wmi_get_devstate_simple(asus,
ASUS_WMI_DEVID_BLUETOOTH);
rfkill_set_sw_state(asus->bluetooth.rfkill, bl);
}
if (asus->wimax.rfkill) {
bl = !asus_wmi_get_devstate_simple(asus, ASUS_WMI_DEVID_WIMAX);
rfkill_set_sw_state(asus->wimax.rfkill, bl);
}
if (asus->wwan3g.rfkill) {
bl = !asus_wmi_get_devstate_simple(asus, ASUS_WMI_DEVID_WWAN3G);
rfkill_set_sw_state(asus->wwan3g.rfkill, bl);
}
if (asus->gps.rfkill) {
bl = !asus_wmi_get_devstate_simple(asus, ASUS_WMI_DEVID_GPS);
rfkill_set_sw_state(asus->gps.rfkill, bl);
}
if (asus->uwb.rfkill) {
bl = !asus_wmi_get_devstate_simple(asus, ASUS_WMI_DEVID_UWB);
rfkill_set_sw_state(asus->uwb.rfkill, bl);
}
if (!IS_ERR_OR_NULL(asus->kbd_led.dev))
kbd_led_update(asus);
return 0;
}
static const struct dev_pm_ops asus_pm_ops = {
.thaw = asus_hotk_thaw,
.restore = asus_hotk_restore,
.resume = asus_hotk_resume,
};
static int asus_wmi_probe(struct platform_device *pdev)
{
struct platform_driver *pdrv = to_platform_driver(pdev->dev.driver);
struct asus_wmi_driver *wdrv = to_asus_wmi_driver(pdrv);
int ret;
if (!wmi_has_guid(ASUS_WMI_MGMT_GUID)) {
pr_warn("Management GUID not found\n");
return -ENODEV;
}
if (wdrv->event_guid && !wmi_has_guid(wdrv->event_guid)) {
pr_warn("Event GUID not found\n");
return -ENODEV;
}
if (wdrv->probe) {
ret = wdrv->probe(pdev);
if (ret)
return ret;
}
return asus_wmi_add(pdev);
}
static bool used;
int __init_or_module asus_wmi_register_driver(struct asus_wmi_driver *driver)
{
struct platform_driver *platform_driver;
struct platform_device *platform_device;
if (used)
return -EBUSY;
platform_driver = &driver->platform_driver;
platform_driver->remove = asus_wmi_remove;
platform_driver->driver.owner = driver->owner;
platform_driver->driver.name = driver->name;
platform_driver->driver.pm = &asus_pm_ops;
platform_device = platform_create_bundle(platform_driver,
asus_wmi_probe,
NULL, 0, NULL, 0);
if (IS_ERR(platform_device))
return PTR_ERR(platform_device);
used = true;
return 0;
}
EXPORT_SYMBOL_GPL(asus_wmi_register_driver);
void asus_wmi_unregister_driver(struct asus_wmi_driver *driver)
{
platform_device_unregister(driver->platform_device);
platform_driver_unregister(&driver->platform_driver);
used = false;
}
EXPORT_SYMBOL_GPL(asus_wmi_unregister_driver);
static int __init asus_wmi_init(void)
{
if (!wmi_has_guid(ASUS_WMI_MGMT_GUID)) {
pr_info("Asus Management GUID not found\n");
return -ENODEV;
}
pr_info("ASUS WMI generic driver loaded\n");
return 0;
}
static void __exit asus_wmi_exit(void)
{
pr_info("ASUS WMI generic driver unloaded\n");
}
module_init(asus_wmi_init);
module_exit(asus_wmi_exit);
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