diff options
author | James Hogan <james@albanarts.com> | 2015-03-31 17:48:06 (GMT) |
---|---|---|
committer | Mauro Carvalho Chehab <mchehab@osg.samsung.com> | 2015-05-14 17:17:03 (GMT) |
commit | 9869da5bacc5c9b865a183bd36c04be76cdd325d (patch) | |
tree | 8e88c886f8da2a61542ad803bdd3139587e9e34a /drivers/media/rc | |
parent | f7e5a6559640dfac9d96bee74d02066a28107aef (diff) | |
download | linux-9869da5bacc5c9b865a183bd36c04be76cdd325d.tar.xz |
[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.h | 2 | ||||
-rw-r--r-- | drivers/media/rc/rc-ir-raw.c | 37 |
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 b68d4f76..122c25f 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 b732ac6..dd47fe5 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 */ |