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Subject[PATCH v2] HID: asus: Add support for the ASUS T101HA keyboard dock
The ASUS T101HA keyboard dock generates HID events using the ASUS vendor
specific UsagePage 0xff31. In consequence, some multimedia keys such as
brightness up and down are not working with hid-generic.

This commit adds the T101HA dock into the supported device list of the
hid-asus driver. It also prevents the dock's integrated touchpad to be
bound with hid-asus given that it is already working fine with
hid-multitouch.

Signed-off-by: Aleix Roca Nonell <kernelrocks@gmail.com>
---

Changes in v2:
- use the report descriptor's application usage to identify the dock's
touchpad instead of the usb interface id

drivers/hid/hid-asus.c | 8 ++++++++
drivers/hid/hid-ids.h | 1 +
2 files changed, 9 insertions(+)

diff --git a/drivers/hid/hid-asus.c b/drivers/hid/hid-asus.c
index ab8bd40a77ed..951bb17ae8b2 100644
--- a/drivers/hid/hid-asus.c
+++ b/drivers/hid/hid-asus.c
@@ -70,6 +70,7 @@ MODULE_DESCRIPTION("Asus HID Keyboard and TouchPad");
#define QUIRK_T100_KEYBOARD BIT(6)
#define QUIRK_T100CHI BIT(7)
#define QUIRK_G752_KEYBOARD BIT(8)
+#define QUIRK_T101HA_DOCK BIT(9)

#define I2C_KEYBOARD_QUIRKS (QUIRK_FIX_NOTEBOOK_REPORT | \
QUIRK_NO_INIT_REPORTS | \
@@ -699,6 +700,11 @@ static int asus_probe(struct hid_device *hdev, const struct hid_device_id *id)
return ret;
}

+ /* use hid-multitouch for T101HA touchpad */
+ if (id->driver_data & QUIRK_T101HA_DOCK &&
+ hdev->collection->usage == HID_GD_MOUSE)
+ return -ENODEV;
+
ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT);
if (ret) {
hid_err(hdev, "Asus hw start failed: %d\n", ret);
@@ -830,6 +836,8 @@ static const struct hid_device_id asus_devices[] = {
{ HID_USB_DEVICE(USB_VENDOR_ID_ASUSTEK,
USB_DEVICE_ID_ASUSTEK_T100TAF_KEYBOARD),
QUIRK_T100_KEYBOARD | QUIRK_NO_CONSUMER_USAGES },
+ { HID_USB_DEVICE(USB_VENDOR_ID_ASUSTEK,
+ USB_DEVICE_ID_ASUSTEK_T101HA_KEYBOARD), QUIRK_T101HA_DOCK },
{ HID_USB_DEVICE(USB_VENDOR_ID_CHICONY, USB_DEVICE_ID_ASUS_AK1D) },
{ HID_USB_DEVICE(USB_VENDOR_ID_TURBOX, USB_DEVICE_ID_ASUS_MD_5110) },
{ HID_USB_DEVICE(USB_VENDOR_ID_JESS, USB_DEVICE_ID_ASUS_MD_5112) },
diff --git a/drivers/hid/hid-ids.h b/drivers/hid/hid-ids.h
index 4206428c0ba2..f1eee2778b70 100644
--- a/drivers/hid/hid-ids.h
+++ b/drivers/hid/hid-ids.h
@@ -184,6 +184,7 @@
#define USB_DEVICE_ID_ASUSTEK_T100TA_KEYBOARD 0x17e0
#define USB_DEVICE_ID_ASUSTEK_T100TAF_KEYBOARD 0x1807
#define USB_DEVICE_ID_ASUSTEK_T100CHI_KEYBOARD 0x8502
+#define USB_DEVICE_ID_ASUSTEK_T101HA_KEYBOARD 0x183d
#define USB_DEVICE_ID_ASUSTEK_T304_KEYBOARD 0x184a
#define USB_DEVICE_ID_ASUSTEK_I2C_KEYBOARD 0x8585
#define USB_DEVICE_ID_ASUSTEK_I2C_TOUCHPAD 0x0101
--
2.20.0
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