[RFC] HID: uhid: Handle LED input events
flat view
From: Andre Guedes <hidden>
Date: 2012-11-01 21:56:42
Subsystem:
hid core layer, the rest, uhid userspace hid io driver · Maintainers:
Jiri Kosina, Benjamin Tissoires, Linus Torvalds, David Rheinsberg
This patches adds support for handling LED input events in uhid driver. When uhid receives an input LED event, we set the proper field, create the output report and send it to userspace as UHID_OUTPUT event. Others input events are sent to userspace as UHID_OUTPUT_EV events. Signed-off-by: Andre Guedes <redacted> --- drivers/hid/uhid.c | 33 +++++++++++++++++++++++++++++---- 1 file changed, 29 insertions(+), 4 deletions(-)
diff --git a/drivers/hid/uhid.c b/drivers/hid/uhid.c
index 714cd8c..e7b7cdc 100644
--- a/drivers/hid/uhid.c
+++ b/drivers/hid/uhid.c@@ -122,15 +122,40 @@ static int uhid_hid_input(struct input_dev *input, unsigned int type, struct uhid_device *uhid = hid->driver_data; unsigned long flags; struct uhid_event *ev; + struct hid_field *field; + struct hid_report *report; + int offset; ev = kzalloc(sizeof(*ev), GFP_ATOMIC); if (!ev) return -ENOMEM; - ev->type = UHID_OUTPUT_EV; - ev->u.output_ev.type = type; - ev->u.output_ev.code = code; - ev->u.output_ev.value = value; + switch (type) { + case EV_LED: + offset = hidinput_find_field(hid, type, code, &field); + if (offset == -1) { + hid_warn(input, "event field not found\n"); + kfree(ev); + return -1; + } + + hid_set_field(field, offset, value); + + report = field->report; + + ev->type = UHID_OUTPUT; + ev->u.output.rtype = UHID_OUTPUT_REPORT; + hid_output_report(report, ev->u.output.data); + ev->u.output.size = ((report->size - 1) >> 3) + 1 + + (report->id > 0); + break; + + default: + ev->type = UHID_OUTPUT_EV; + ev->u.output_ev.type = type; + ev->u.output_ev.code = code; + ev->u.output_ev.value = value; + } spin_lock_irqsave(&uhid->qlock, flags); uhid_queue(uhid, ev);
--
1.8.0