On Thu, Apr 18, 2019 at 2:46 PM Chris Chiu <chiu@xxxxxxxxxxxx> wrote:
>
> Some of latest ASUS laptops support new fn-lock mode switching.
> This commit detect whether if the fn-lock option is enabled in
> BIOS setting, and toggle the fn-lock mode via a new WMI DEVID
> 0x00100023 when the corresponding notify code captured.
>
> The ASUS fn-lock mode switch is activated by pressing Fn+Esc.
> When on, keys F1 to F12 behave as applicable, with meanings
> defined by the application being used at the time. When off,
> F1 to F12 directly triggers hardware features, well known audio
> volume up/down, brightness up/down...etc, which were triggered
> by holding down Fn key and F-keys.
>
> Because there's no way to retrieve the fn-lock mode via existing
> WMI methods per ASUS spec, driver need to initialize and keep the
> fn-lock mode by itself.
>
> Signed-off-by: Chris Chiu <chiu@xxxxxxxxxxxx>
> ---
> drivers/platform/x86/asus-wmi.c | 36 ++++++++++++++++++++++++++++++
> include/linux/platform_data/x86/asus-wmi.h | 1 +
> 2 files changed, 37 insertions(+)
>
> diff --git a/drivers/platform/x86/asus-wmi.c b/drivers/platform/x86/asus-wmi.c
> index 37b5de541270..5f52b66e40cb 100644
> --- a/drivers/platform/x86/asus-wmi.c
> +++ b/drivers/platform/x86/asus-wmi.c
> @@ -69,6 +69,7 @@ MODULE_LICENSE("GPL");
> #define NOTIFY_KBD_BRTUP 0xc4
> #define NOTIFY_KBD_BRTDWN 0xc5
> #define NOTIFY_KBD_BRTTOGGLE 0xc7
> +#define NOTIFY_FNLOCK_TOGGLE 0x4e
>
> #define ASUS_FAN_DESC "cpu_fan"
> #define ASUS_FAN_MFUN 0x13
> @@ -177,6 +178,8 @@ struct asus_wmi {
> struct workqueue_struct *hotplug_workqueue;
> struct work_struct hotplug_work;
>
> + bool fnlock_locked;
> +
> struct asus_wmi_debug debug;
>
> struct asus_wmi_driver *driver;
> @@ -1619,6 +1622,24 @@ static int is_display_toggle(int code)
> return 0;
> }
>
> +static bool asus_wmi_has_fnlock_key(struct asus_wmi *asus)
> +{
> +#define ASUS_WMI_FNLOCK_BIOS_DISABLED BIT(0)
> + u32 result;
> +
> + asus_wmi_get_devstate(asus, ASUS_WMI_DEVID_FNLOCK, &result);
> +
> + return (result & ASUS_WMI_DSTS_PRESENCE_BIT) &&
> + !(result & ASUS_WMI_FNLOCK_BIOS_DISABLED);
> +}
> +
> +static void asus_wmi_fnlock_update(struct asus_wmi *asus)
> +{
> + int mode = asus->fnlock_locked;
> +
> + asus_wmi_set_devstate(ASUS_WMI_DEVID_FNLOCK, mode, NULL);
> +}
> +
> static void asus_wmi_notify(u32 value, void *context)
> {
> struct asus_wmi *asus = context;
> @@ -1680,6 +1701,12 @@ static void asus_wmi_notify(u32 value, void *context)
> goto exit;
> }
>
> + if (code == NOTIFY_FNLOCK_TOGGLE) {
> + asus->fnlock_locked = !asus->fnlock_locked;
> + asus_wmi_fnlock_update(asus);
> + goto exit;
> + }
> +
> if (is_display_toggle(code) &&
> asus->driver->quirks->no_display_toggle)
> goto exit;
> @@ -2134,6 +2161,11 @@ static int asus_wmi_add(struct platform_device *pdev)
> } else
> err = asus_wmi_set_devstate(ASUS_WMI_DEVID_BACKLIGHT, 2, NULL);
>
> + if (asus_wmi_has_fnlock_key(asus)) {
> + asus->fnlock_locked = true;
> + asus_wmi_fnlock_update(asus);
> + }
> +
> status = wmi_install_notify_handler(asus->driver->event_guid,
> asus_wmi_notify, asus);
> if (ACPI_FAILURE(status)) {
> @@ -2213,6 +2245,8 @@ static int asus_hotk_resume(struct device *device)
> if (!IS_ERR_OR_NULL(asus->kbd_led.dev))
> kbd_led_update(asus);
>
> + if (asus_wmi_has_fnlock_key(asus))
> + asus_wmi_fnlock_update(asus);
> return 0;
> }
>
> @@ -2249,6 +2283,8 @@ static int asus_hotk_restore(struct device *device)
> if (!IS_ERR_OR_NULL(asus->kbd_led.dev))
> kbd_led_update(asus);
>
> + if (asus_wmi_has_fnlock_key(asus))
> + asus_wmi_fnlock_update(asus);
> return 0;
> }
>
> diff --git a/include/linux/platform_data/x86/asus-wmi.h b/include/linux/platform_data/x86/asus-wmi.h
> index 53dfc2541960..bfba245636a7 100644
> --- a/include/linux/platform_data/x86/asus-wmi.h
> +++ b/include/linux/platform_data/x86/asus-wmi.h
> @@ -67,6 +67,7 @@
> /* Input */
> #define ASUS_WMI_DEVID_TOUCHPAD 0x00100011
> #define ASUS_WMI_DEVID_TOUCHPAD_LED 0x00100012
> +#define ASUS_WMI_DEVID_FNLOCK 0x00100023
>
> /* Fan, Thermal */
> #define ASUS_WMI_DEVID_THERMAL_CTRL 0x00110011
> --
> 2.11.0
>
Gentle ping. Any comments or suggestions for this are appreciated.
Chris
