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>
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@ -1253,6 +1253,20 @@ static void usbhid_request(struct hid_device *hid, struct hid_report *rep, int r
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}
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}
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static int usbhid_idle(struct hid_device *hid, int report, int idle,
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int reqtype)
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{
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struct usb_device *dev = hid_to_usb_dev(hid);
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struct usb_interface *intf = to_usb_interface(hid->dev.parent);
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struct usb_host_interface *interface = intf->cur_altsetting;
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int ifnum = interface->desc.bInterfaceNumber;
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if (reqtype != HID_REQ_SET_IDLE)
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return -EINVAL;
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return hid_set_idle(dev, ifnum, report, idle);
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}
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static struct hid_ll_driver usb_hid_driver = {
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.parse = usbhid_parse,
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.start = usbhid_start,
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@ -1263,6 +1277,7 @@ static struct hid_ll_driver usb_hid_driver = {
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.hidinput_input_event = usb_hidinput_input_event,
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.request = usbhid_request,
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.wait = usbhid_wait_io,
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.idle = usbhid_idle,
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};
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static int usbhid_probe(struct usb_interface *intf, const struct usb_device_id *id)
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@ -664,6 +664,7 @@ struct hid_driver {
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* shouldn't allocate anything to not leak memory
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* @request: send report request to device (e.g. feature report)
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* @wait: wait for buffered io to complete (send/recv reports)
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* @idle: send idle request to device
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*/
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struct hid_ll_driver {
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int (*start)(struct hid_device *hdev);
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@ -683,6 +684,7 @@ struct hid_ll_driver {
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struct hid_report *report, int reqtype);
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int (*wait)(struct hid_device *hdev);
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int (*idle)(struct hid_device *hdev, int report, int idle, int reqtype);
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};
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@ -906,6 +908,23 @@ static inline void hid_hw_request(struct hid_device *hdev,
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hdev->ll_driver->request(hdev, report, reqtype);
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}
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/**
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* hid_hw_idle - send idle request to device
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*
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* @hdev: hid device
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* @report: report to control
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* @idle: idle state
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* @reqtype: hid request type
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*/
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static inline int hid_hw_idle(struct hid_device *hdev, int report, int idle,
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int reqtype)
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{
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if (hdev->ll_driver->idle)
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return hdev->ll_driver->idle(hdev, report, idle, reqtype);
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return 0;
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}
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/**
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* hid_hw_wait - wait for buffered io to complete
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*
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