linux-kernel - [PATCH 3/3] HID: rmi: Add support for the touchpad in the Razer Blade 14 laptop

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Date:	Fri, 19 Dec 2014 14:45:43 -0800
From:	Andrew Duggan <aduggan@...aptics.com>
To:	<linux-input@...r.kernel.org>, <linux-kernel@...r.kernel.org>
CC:	Andrew Duggan <aduggan@...aptics.com>,
	Jiri Kosina <jkosina@...e.cz>,
	Benjamin Tissoires <benjamin.tissoires@...hat.com>
Subject: [PATCH 3/3] HID: rmi: Add support for the touchpad in the Razer Blade 14 laptop

Have hid-rmi handle all of the Razer Blade HID devices that are part of the
composite USB device. This will allow hid-rmi to operate the touchpad in rmi
mode while passing events from the other devices to hid-input.

Signed-off-by: Andrew Duggan <aduggan@...aptics.com>
---
 drivers/hid/hid-core.c |  1 +
 drivers/hid/hid-ids.h  |  3 +++
 drivers/hid/hid-rmi.c  | 15 +++++++++++++++
 3 files changed, 19 insertions(+)

diff --git a/drivers/hid/hid-core.c b/drivers/hid/hid-core.c
index 81665b4..ef718f9 100644
--- a/drivers/hid/hid-core.c
+++ b/drivers/hid/hid-core.c
@@ -1982,6 +1982,7 @@ static const struct hid_device_id hid_have_special_driver[] = {
 	{ HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_MICROSOFT, USB_DEVICE_ID_MS_PRESENTER_8K_BT) },
 	{ HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_NINTENDO, USB_DEVICE_ID_NINTENDO_WIIMOTE) },
 	{ HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_NINTENDO, USB_DEVICE_ID_NINTENDO_WIIMOTE2) },
+	{ HID_USB_DEVICE(USB_VENDOR_ID_RAZER, USB_DEVICE_ID_RAZER_BLADE_14) },
 	{ }
 };
 
diff --git a/drivers/hid/hid-ids.h b/drivers/hid/hid-ids.h
index 7460f34..7d0912d 100644
--- a/drivers/hid/hid-ids.h
+++ b/drivers/hid/hid-ids.h
@@ -767,6 +767,9 @@
 #define USB_DEVICE_ID_QUANTA_OPTICAL_TOUCH_3001		0x3001
 #define USB_DEVICE_ID_QUANTA_OPTICAL_TOUCH_3008		0x3008
 
+#define USB_VENDOR_ID_RAZER            0x1532
+#define USB_DEVICE_ID_RAZER_BLADE_14   0x011D
+
 #define USB_VENDOR_ID_REALTEK		0x0bda
 #define USB_DEVICE_ID_REALTEK_READER	0x0152
 
diff --git a/drivers/hid/hid-rmi.c b/drivers/hid/hid-rmi.c
index cdfe165..849b35a 100644
--- a/drivers/hid/hid-rmi.c
+++ b/drivers/hid/hid-rmi.c
@@ -1038,6 +1038,20 @@ static int rmi_probe(struct hid_device *hdev, const struct hid_device_id *id)
 
 	data->readReport = data->writeReport + data->output_report_size;
 
+	/*
+	 * Unfortunately there is no way to query the touchpad in the
+	 * Razer system to determine that it has pass through buttons
+	 * so the only solution is to set phys buttons flag based on the
+	 * vid and pid. In the future we should be able to query devices
+	 * to find out. However, we need to know if the touchpad has
+	 * physical buttons before the input_mapping gets called which
+	 * is before we query the device. So we may have to resort to creating
+	 * a list of devices based on product id.
+	 */
+	if (hdev->vendor == USB_VENDOR_ID_RAZER &&
+	    hdev->product == USB_DEVICE_ID_RAZER_BLADE_14)
+		data->device_flags |= RMI_DEVICE_HAS_PHYS_BUTTONS;
+
 	init_waitqueue_head(&data->wait);
 
 	mutex_init(&data->page_mutex);
@@ -1074,6 +1088,7 @@ static void rmi_remove(struct hid_device *hdev)
 
 static const struct hid_device_id rmi_id[] = {
 	{ HID_DEVICE(HID_BUS_ANY, HID_GROUP_RMI, HID_ANY_ID, HID_ANY_ID) },
+	{ HID_USB_DEVICE(USB_VENDOR_ID_RAZER, USB_DEVICE_ID_RAZER_BLADE_14) },
 	{ }
 };
 MODULE_DEVICE_TABLE(hid, rmi_id);
-- 
2.1.0

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