[PATCH 3/7] hid: extend interface with report requests

[Henrik Rydberg]

---
 drivers/hid/usbhid/hid-core.c | 14 ++++++++++++++
 include/linux/hid.h           | 33 +++++++++++++++++++++++++++++++++
 2 files changed, 47 insertions(+)

diff --git a/drivers/hid/usbhid/hid-core.c b/drivers/hid/usbhid/hid-core.c
index de1f9ac..3c618da 100644
--- a/drivers/hid/usbhid/hid-core.c
+++ b/drivers/hid/usbhid/hid-core.c
@@ -1251,6 +1251,18 @@ static int usbhid_power(struct hid_device *hid, int lvl)
 	return r;
 }
 
+static void usbhid_send(struct hid_device *hid, struct hid_report *rep, int req)
+{
+	switch (req) {
+	case HID_REQ_GET_REPORT:
+		usbhid_submit_report(hid, rep, USB_DIR_IN);
+		break;
+	case HID_REQ_SET_REPORT:
+		usbhid_submit_report(hid, rep, USB_DIR_OUT);
+		break;
+	}
+}
+
 static struct hid_ll_driver usb_hid_driver = {
 	.parse = usbhid_parse,
 	.start = usbhid_start,
@@ -1259,6 +1271,8 @@ static struct hid_ll_driver usb_hid_driver = {
 	.close = usbhid_close,
 	.power = usbhid_power,
 	.hidinput_input_event = usb_hidinput_input_event,
+	.send = usbhid_send,
+	.wait = usbhid_wait_io,
 };
 
 static int usbhid_probe(struct usb_interface *intf, const struct usb_device_id *id)
diff --git a/include/linux/hid.h b/include/linux/hid.h
index 241eb40..5e169c1 100644
--- a/include/linux/hid.h
+++ b/include/linux/hid.h
@@ -686,6 +686,8 @@ struct hid_driver {
  * @hidinput_input_event: event input event (e.g. ff or leds)
  * @parse: this method is called only once to parse the device data,
  *	   shouldn't allocate anything to not leak memory
+ * @send: send report request to device (e.g. feature report)
+ * @wait: wait for buffered io to complete (send/recv reports)
  */
 struct hid_ll_driver {
 	int (*start)(struct hid_device *hdev);
@@ -700,6 +702,11 @@ struct hid_ll_driver {
 			unsigned int code, int value);
 
 	int (*parse)(struct hid_device *hdev);
+
+	void (*send)(struct hid_device *hdev,
+		     struct hid_report *report, int req);
+	int (*wait)(struct hid_device *hdev);
+
 };
 
 #define	PM_HINT_FULLON	1<<5
@@ -892,6 +899,32 @@ static inline int hid_hw_power(struct hid_device *hdev, int level)
 	return hdev->ll_driver->power ? hdev->ll_driver->power(hdev, level) : 0;
 }
 
+
+/**
+ * hid_hw_send - send report request to device
+ *
+ * @hdev: hid device
+ * @report: report to send
+ * @req: hid request type
+ */
+static inline void hid_hw_send(struct hid_device *hdev,
+			       struct hid_report *report, int req)
+{
+	if (hdev->ll_driver->send)
+		hdev->ll_driver->send(hdev, report, req);
+}
+
+/**
+ * hid_hw_wait - wait for buffered io to complete
+ *
+ * @hdev: hid device
+ */
+static inline void hid_hw_wait(struct hid_device *hdev)
+{
+	if (hdev->ll_driver->wait)
+		hdev->ll_driver->wait(hdev);
+}
+
 int hid_report_raw_event(struct hid_device *hid, int type, u8 *data, int size,
 		int interrupt);
 
-- 
1.7.11.1

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