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authorJames Hogan <james@albanarts.com>2015-03-31 14:48:06 -0300
committerMauro Carvalho Chehab <mchehab@osg.samsung.com>2015-05-14 14:17:03 -0300
commit9869da5bacc5c9b865a183bd36c04be76cdd325d (patch)
tree8e88c886f8da2a61542ad803bdd3139587e9e34a /drivers/media/rc
parentf7e5a6559640dfac9d96bee74d02066a28107aef (diff)
[media] rc: rc-ir-raw: Add scancode encoder callback
Add a callback to raw ir handlers for encoding and modulating a scancode to a set of raw events. This could be used for transmit, or for converting a wakeup scancode filter to a form that is more suitable for raw hardware wake up filters. Signed-off-by: James Hogan <james@albanarts.com> Signed-off-by: Antti Seppälä <a.seppala@gmail.com> Cc: David Härdeman <david@hardeman.nu> Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Diffstat (limited to 'drivers/media/rc')
-rw-r--r--drivers/media/rc/rc-core-priv.h2
-rw-r--r--drivers/media/rc/rc-ir-raw.c37
2 files changed, 39 insertions, 0 deletions
diff --git a/drivers/media/rc/rc-core-priv.h b/drivers/media/rc/rc-core-priv.h
index b68d4f762734..122c25fe91e0 100644
--- a/drivers/media/rc/rc-core-priv.h
+++ b/drivers/media/rc/rc-core-priv.h
@@ -25,6 +25,8 @@ struct ir_raw_handler {
u64 protocols; /* which are handled by this handler */
int (*decode)(struct rc_dev *dev, struct ir_raw_event event);
+ int (*encode)(u64 protocols, const struct rc_scancode_filter *scancode,
+ struct ir_raw_event *events, unsigned int max);
/* These two should only be used by the lirc decoder */
int (*raw_register)(struct rc_dev *dev);
diff --git a/drivers/media/rc/rc-ir-raw.c b/drivers/media/rc/rc-ir-raw.c
index b732ac6a26d8..dd47fe567f03 100644
--- a/drivers/media/rc/rc-ir-raw.c
+++ b/drivers/media/rc/rc-ir-raw.c
@@ -246,6 +246,43 @@ static int change_protocol(struct rc_dev *dev, u64 *rc_type)
return 0;
}
+/**
+ * ir_raw_encode_scancode() - Encode a scancode as raw events
+ *
+ * @protocols: permitted protocols
+ * @scancode: scancode filter describing a single scancode
+ * @events: array of raw events to write into
+ * @max: max number of raw events
+ *
+ * Attempts to encode the scancode as raw events.
+ *
+ * Returns: The number of events written.
+ * -ENOBUFS if there isn't enough space in the array to fit the
+ * encoding. In this case all @max events will have been written.
+ * -EINVAL if the scancode is ambiguous or invalid, or if no
+ * compatible encoder was found.
+ */
+int ir_raw_encode_scancode(u64 protocols,
+ const struct rc_scancode_filter *scancode,
+ struct ir_raw_event *events, unsigned int max)
+{
+ struct ir_raw_handler *handler;
+ int ret = -EINVAL;
+
+ mutex_lock(&ir_raw_handler_lock);
+ list_for_each_entry(handler, &ir_raw_handler_list, list) {
+ if (handler->protocols & protocols && handler->encode) {
+ ret = handler->encode(protocols, scancode, events, max);
+ if (ret >= 0 || ret == -ENOBUFS)
+ break;
+ }
+ }
+ mutex_unlock(&ir_raw_handler_lock);
+
+ return ret;
+}
+EXPORT_SYMBOL(ir_raw_encode_scancode);
+
/*
* Used to (un)register raw event clients
*/

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