ALSA: firewire-tascam: add hwdep interface
This commit adds hwdep interface so as the other IEEE 1394 sound devices
has.
This interface is designed for mixer/control applications. By using this
interface, an application can get information about firewire node, can
lock/unlock kernel streaming and can get notification at starting/stopping
kernel streaming.
Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
diff --git a/sound/firewire/tascam/tascam.h b/sound/firewire/tascam/tascam.h
index 28c875f..75a3b9a 100644
--- a/sound/firewire/tascam/tascam.h
+++ b/sound/firewire/tascam/tascam.h
@@ -23,6 +23,8 @@
#include <sound/info.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
+#include <sound/firewire.h>
+#include <sound/hwdep.h>
#include "../lib.h"
#include "../amdtp-stream.h"
@@ -44,6 +46,7 @@
struct fw_unit *unit;
struct mutex mutex;
+ spinlock_t lock;
const struct snd_tscm_spec *spec;
@@ -52,6 +55,10 @@
struct amdtp_stream tx_stream;
struct amdtp_stream rx_stream;
unsigned int substreams_counter;
+
+ int dev_lock_count;
+ bool dev_lock_changed;
+ wait_queue_head_t hwdep_wait;
};
#define TSCM_ADDR_BASE 0xffff00000000ull
@@ -97,8 +104,14 @@
int snd_tscm_stream_start_duplex(struct snd_tscm *tscm, unsigned int rate);
void snd_tscm_stream_stop_duplex(struct snd_tscm *tscm);
+void snd_tscm_stream_lock_changed(struct snd_tscm *tscm);
+int snd_tscm_stream_lock_try(struct snd_tscm *tscm);
+void snd_tscm_stream_lock_release(struct snd_tscm *tscm);
+
void snd_tscm_proc_init(struct snd_tscm *tscm);
int snd_tscm_create_pcm_devices(struct snd_tscm *tscm);
+int snd_tscm_create_hwdep_device(struct snd_tscm *tscm);
+
#endif
