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android/hid: Handle uhid events

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Handling few uhid events and described scenarios. OUTPUT and
FEATURE events are not yet handled.
This commit is contained in:
Ravi kumar Veeramally 2013-11-05 23:09:17 +02:00 committed by Johan Hedberg
parent 1aee093b3e
commit 8c7daf5389
1 changed files with 39 additions and 1 deletions
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40
android/hid.c
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@ -149,6 +149,11 @@ static void hid_device_free(struct hid_device *dev)
g_free(dev);
}
static void handle_uhid_event(struct hid_device *dev, struct uhid_event *ev)
{
DBG("UHID_OUTPUT UHID_FEATURE unsupported");
}
static gboolean uhid_event_cb(GIOChannel *io, GIOCondition cond,
gpointer user_data)
{
@ -172,7 +177,40 @@ static gboolean uhid_event_cb(GIOChannel *io, GIOCondition cond,
}
DBG("uHID event type %d received", ev.type);
/* TODO Handle events */
switch (ev.type) {
case UHID_START:
case UHID_STOP:
/* These are called to start and stop the underlying hardware.
* We open the channels before creating the device so the
* hardware is always ready. No need to handle these.
* The kernel never destroys a device itself! Only an explicit
* UHID_DESTROY request can remove a device. */
break;
case UHID_OPEN:
case UHID_CLOSE:
/* OPEN/CLOSE are sent whenever user-space opens any interface
* provided by the kernel HID device. Whenever the open-count
* is non-zero we must be ready for I/O. As long as it is zero,
* we can decide to drop all I/O and put the device
* asleep This is optional, though. */
break;
case UHID_OUTPUT:
case UHID_FEATURE:
handle_uhid_event(dev, &ev);
break;
case UHID_OUTPUT_EV:
/* This is only sent by kernels prior to linux-3.11. It
* requires us to parse HID-descriptors in user-space to
* properly handle it. This is redundant as the kernel
* does it already. That's why newer kernels assemble
* the output-reports and send it to us via UHID_OUTPUT. */
DBG("UHID_OUTPUT_EV unsupported");
break;
default:
warn("unexpected uHID event");
}
return TRUE;