Handling few uhid events and described scenarios. OUTPUT and
FEATURE events are not yet handled.
---
android/hid.c | 40 +++++++++++++++++++++++++++++++++++++++-
1 file changed, 39 insertions(+), 1 deletion(-)
diff --git a/android/hid.c b/android/hid.c
index d3a74b9..8f3a28a 100644
--- a/android/hid.c
+++ b/android/hid.c
@@ -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;
--
1.8.1.2
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