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| author | James Hogan <james@albanarts.com> | 2015-03-31 14:48:06 -0300 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@osg.samsung.com> | 2015-05-14 14:17:03 -0300 |
| commit | 9869da5bacc5c9b865a183bd36c04be76cdd325d (patch) | |
| tree | 8e88c886f8da2a61542ad803bdd3139587e9e34a | |
| parent | f7e5a6559640dfac9d96bee74d02066a28107aef (diff) | |
| download | op-kernel-dev-9869da5bacc5c9b865a183bd36c04be76cdd325d.zip op-kernel-dev-9869da5bacc5c9b865a183bd36c04be76cdd325d.tar.gz | |
[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>
| -rw-r--r-- | drivers/media/rc/rc-core-priv.h | 2 | ||||
| -rw-r--r-- | drivers/media/rc/rc-ir-raw.c | 37 | ||||
| -rw-r--r-- | include/media/rc-core.h | 3 |
3 files changed, 42 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 */ diff --git a/include/media/rc-core.h b/include/media/rc-core.h index 2c7fbca..5703c08 100644 --- a/include/media/rc-core.h +++ b/include/media/rc-core.h @@ -250,6 +250,9 @@ int ir_raw_event_store_edge(struct rc_dev *dev, enum raw_event_type type); int ir_raw_event_store_with_filter(struct rc_dev *dev, struct ir_raw_event *ev); void ir_raw_event_set_idle(struct rc_dev *dev, bool idle); +int ir_raw_encode_scancode(u64 protocols, + const struct rc_scancode_filter *scancode, + struct ir_raw_event *events, unsigned int max); static inline void ir_raw_event_reset(struct rc_dev *dev) { |
