USB HID: provide hook for hidraw write()
Add hook in usbhid for write() callback from hidraw. Sends the
report to the device through control pipe.
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
diff --git a/drivers/hid/usbhid/hid-core.c b/drivers/hid/usbhid/hid-core.c
index 0a1f2b5..74b817d 100644
--- a/drivers/hid/usbhid/hid-core.c
+++ b/drivers/hid/usbhid/hid-core.c
@@ -628,6 +628,28 @@
return 0;
}
+static int usbhid_output_raw_report(struct hid_device *hid, __u8 *buf, size_t count)
+{
+ struct usbhid_device *usbhid = hid->driver_data;
+ struct usb_device *dev = hid_to_usb_dev(hid);
+ struct usb_interface *intf = usbhid->intf;
+ struct usb_host_interface *interface = intf->cur_altsetting;
+ int ret;
+
+ ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
+ HID_REQ_SET_REPORT,
+ USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE,
+ cpu_to_le16(((HID_OUTPUT_REPORT + 1) << 8) | *buf),
+ interface->desc.bInterfaceNumber, buf + 1, count - 1,
+ USB_CTRL_SET_TIMEOUT);
+
+ /* count also the report id */
+ if (ret > 0)
+ ret++;
+
+ return ret;
+}
+
static void hid_free_buffers(struct usb_device *dev, struct hid_device *hid)
{
struct usbhid_device *usbhid = hid->driver_data;
@@ -871,6 +893,7 @@
hid->hiddev_hid_event = hiddev_hid_event;
hid->hiddev_report_event = hiddev_report_event;
#endif
+ hid->hid_output_raw_report = usbhid_output_raw_report;
return hid;
fail: