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authorBenjamin Tissoires <benjamin.tissoires@redhat.com>2013-02-27 19:38:17 +0400
committerJiri Kosina <jkosina@suse.cz>2013-03-07 18:58:17 +0400
commit9684819b5a29e62acd8265a92d8f3454de9bb71e (patch)
tree8b2da81d84a83ffe794f404cc547e6e8f5c7beef /include/linux/hid.h
parent777d4bb39a585ff54817815544941c2da70a0bb9 (diff)
downloadlinux-9684819b5a29e62acd8265a92d8f3454de9bb71e.tar.xz
HID: ll_driver: Extend the interface with idle requests
Some drivers send the idle command directly to underlying device, creating an unwanted dependency on the underlying transport layer. This patch adds hid_hw_idle() to the interface, thereby removing usbhid from the lion share of the drivers. Signed-off-by: Benjamin Tissoires <benjamin.tissoires@redhat.com> Reviewed-by: David Herrmann <dh.herrmann@gmail.com> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Diffstat (limited to 'include/linux/hid.h')
-rw-r--r--include/linux/hid.h19
1 files changed, 19 insertions, 0 deletions
diff --git a/include/linux/hid.h b/include/linux/hid.h
index 7071eb3d36c7..863744c38ddc 100644
--- a/include/linux/hid.h
+++ b/include/linux/hid.h
@@ -664,6 +664,7 @@ struct hid_driver {
* shouldn't allocate anything to not leak memory
* @request: send report request to device (e.g. feature report)
* @wait: wait for buffered io to complete (send/recv reports)
+ * @idle: send idle request to device
*/
struct hid_ll_driver {
int (*start)(struct hid_device *hdev);
@@ -683,6 +684,7 @@ struct hid_ll_driver {
struct hid_report *report, int reqtype);
int (*wait)(struct hid_device *hdev);
+ int (*idle)(struct hid_device *hdev, int report, int idle, int reqtype);
};
@@ -907,6 +909,23 @@ static inline void hid_hw_request(struct hid_device *hdev,
}
/**
+ * hid_hw_idle - send idle request to device
+ *
+ * @hdev: hid device
+ * @report: report to control
+ * @idle: idle state
+ * @reqtype: hid request type
+ */
+static inline int hid_hw_idle(struct hid_device *hdev, int report, int idle,
+ int reqtype)
+{
+ if (hdev->ll_driver->idle)
+ return hdev->ll_driver->idle(hdev, report, idle, reqtype);
+
+ return 0;
+}
+
+/**
* hid_hw_wait - wait for buffered io to complete
*
* @hdev: hid device