ALSA: bebob: Prepare for device specific operations

This commit is for some devices which have its own operations or quirks.

Many functionality should be implemented in user land. Then this commit adds
functionality related to stream such as sampling frequency or clock source. For
help to debug, this commit adds the functionality to get metering information
if it's available.

To help these functionalities, this commit adds some AV/C commands defined in
'AV/C Audio Subunit Specification (1394TA).

Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

1 files changed, 32 insertions, 1 deletions

diff --git a/sound/firewire/bebob/bebob.h b/sound/firewire/bebob/bebob.h
index e8a5e447ff17..7365f92a6aed 100644
--- a/sound/firewire/bebob/bebob.h
+++ b/sound/firewire/bebob/bebob.h
@@ -48,6 +48,28 @@ struct snd_bebob_stream_formation {
 /* this is a lookup table for index of stream formations */
 extern const unsigned int snd_bebob_rate_table[SND_BEBOB_STRM_FMT_ENTRIES];
 
+/* device specific operations */
+#define SND_BEBOB_CLOCK_INTERNAL	"Internal"
+struct snd_bebob_clock_spec {
+	unsigned int num;
+	char *const *labels;
+	int (*get)(struct snd_bebob *bebob, unsigned int *id);
+};
+struct snd_bebob_rate_spec {
+	int (*get)(struct snd_bebob *bebob, unsigned int *rate);
+	int (*set)(struct snd_bebob *bebob, unsigned int rate);
+};
+struct snd_bebob_meter_spec {
+	unsigned int num;
+	char *const *labels;
+	int (*get)(struct snd_bebob *bebob, u32 *target, unsigned int size);
+};
+struct snd_bebob_spec {
+	struct snd_bebob_clock_spec *clock;
+	struct snd_bebob_rate_spec *rate;
+	struct snd_bebob_meter_spec *meter;
+};
+
 struct snd_bebob {
 	struct snd_card *card;
 	struct fw_unit *unit;
@@ -56,6 +78,8 @@ struct snd_bebob {
 	struct mutex mutex;
 	spinlock_t lock;
 
+	const struct snd_bebob_spec *spec;
+
 	unsigned int midi_input_ports;
 	unsigned int midi_output_ports;
 
@@ -100,6 +124,12 @@ snd_bebob_read_quad(struct fw_unit *unit, u64 addr, u32 *buf)
 				  (void *)buf, sizeof(u32), 0);
 }
 
+/* AV/C Audio Subunit Specification 1.0 (Oct 2000, 1394TA) */
+int avc_audio_set_selector(struct fw_unit *unit, unsigned int subunit_id,
+			   unsigned int fb_id, unsigned int num);
+int avc_audio_get_selector(struct fw_unit *unit, unsigned  int subunit_id,
+			   unsigned int fb_id, unsigned int *num);
+
 /*
  * AVC command extensions, AV/C Unit and Subunit, Revision 17
  * (Nov 2003, BridgeCo)
@@ -194,12 +224,13 @@ int snd_bebob_create_pcm_devices(struct snd_bebob *bebob);
 
 int snd_bebob_create_hwdep_device(struct snd_bebob *bebob);
 
-#define SND_BEBOB_DEV_ENTRY(vendor, model) \
+#define SND_BEBOB_DEV_ENTRY(vendor, model, data) \
 { \
 	.match_flags	= IEEE1394_MATCH_VENDOR_ID | \
 			  IEEE1394_MATCH_MODEL_ID, \
 	.vendor_id	= vendor, \
 	.model_id	= model, \
+	.driver_data	= (kernel_ulong_t)data \
 }
 
 #endif