ALSA: fireface: add local framework to message parser
This commit adds local framework to message parser. This is preparation
for future work to pass event of knob control for Fireface 400 to user
space.
Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Link: https://lore.kernel.org/r/20230112120954.500692-6-o-takashi@sakamocchi.jp
Signed-off-by: Takashi Iwai <tiwai@suse.de>
diff --git a/sound/firewire/fireface/ff.h b/sound/firewire/fireface/ff.h
index f430ebe..7e42f57 100644
--- a/sound/firewire/fireface/ff.h
+++ b/sound/firewire/fireface/ff.h
@@ -97,6 +97,8 @@ struct snd_ff {
wait_queue_head_t hwdep_wait;
struct amdtp_domain domain;
+
+ void *msg_parser;
};
enum snd_ff_clock_src {
@@ -110,6 +112,9 @@ enum snd_ff_clock_src {
};
struct snd_ff_protocol {
+ size_t msg_parser_size;
+ bool (*has_msg)(struct snd_ff *ff);
+ long (*copy_msg_to_user)(struct snd_ff *ff, char __user *buf, long count);
void (*handle_msg)(struct snd_ff *ff, unsigned int offset, const __le32 *buf,
size_t length, u32 tstamp);
int (*fill_midi_msg)(struct snd_ff *ff,
