summaryrefslogtreecommitdiff
diff options
context:
space:
mode:
-rw-r--r--include/uapi/sound/firewire.h6
-rw-r--r--sound/firewire/tascam/amdtp-tascam.c34
-rw-r--r--sound/firewire/tascam/tascam-hwdep.c2
-rw-r--r--sound/firewire/tascam/tascam.h6
4 files changed, 47 insertions, 1 deletions
diff --git a/include/uapi/sound/firewire.h b/include/uapi/sound/firewire.h
index 012f81bf4750..bb067efb09c6 100644
--- a/include/uapi/sound/firewire.h
+++ b/include/uapi/sound/firewire.h
@@ -53,6 +53,12 @@ struct snd_firewire_event_motu_notification {
__u32 message; /* MOTU-specific bits. */
};
+struct snd_firewire_tascam_change {
+ unsigned int index;
+ __be32 before;
+ __be32 after;
+};
+
union snd_firewire_event {
struct snd_firewire_event_common common;
struct snd_firewire_event_lock_status lock_status;
diff --git a/sound/firewire/tascam/amdtp-tascam.c b/sound/firewire/tascam/amdtp-tascam.c
index 516cb931fd5e..0e8088c9ada9 100644
--- a/sound/firewire/tascam/amdtp-tascam.c
+++ b/sound/firewire/tascam/amdtp-tascam.c
@@ -121,13 +121,45 @@ static void read_status_messages(struct amdtp_stream *s,
__be32 *buffer, unsigned int data_blocks)
{
struct snd_tscm *tscm = container_of(s, struct snd_tscm, tx_stream);
+ bool used = READ_ONCE(tscm->hwdep->used);
int i;
for (i = 0; i < data_blocks; i++) {
unsigned int index;
+ __be32 before;
+ __be32 after;
index = be32_to_cpu(buffer[0]) % SNDRV_FIREWIRE_TASCAM_STATE_COUNT;
- tscm->state[index] = buffer[s->data_block_quadlets - 1];
+ before = tscm->state[index];
+ after = buffer[s->data_block_quadlets - 1];
+
+ if (used && index > 4 && index < 16) {
+ __be32 mask;
+
+ if (index == 5)
+ mask = cpu_to_be32(~0x0000ffff);
+ else if (index == 6)
+ mask = cpu_to_be32(~0x0000ffff);
+ else if (index == 8)
+ mask = cpu_to_be32(~0x000f0f00);
+ else
+ mask = cpu_to_be32(~0x00000000);
+
+ if ((before ^ after) & mask) {
+ struct snd_firewire_tascam_change *entry =
+ &tscm->queue[tscm->push_pos];
+
+ spin_lock_irq(&tscm->lock);
+ entry->index = index;
+ entry->before = before;
+ entry->after = after;
+ if (++tscm->push_pos >= SND_TSCM_QUEUE_COUNT)
+ tscm->push_pos = 0;
+ spin_unlock_irq(&tscm->lock);
+ }
+ }
+
+ tscm->state[index] = after;
buffer += s->data_block_quadlets;
}
}
diff --git a/sound/firewire/tascam/tascam-hwdep.c b/sound/firewire/tascam/tascam-hwdep.c
index a80397116c48..9afa827af05d 100644
--- a/sound/firewire/tascam/tascam-hwdep.c
+++ b/sound/firewire/tascam/tascam-hwdep.c
@@ -195,5 +195,7 @@ int snd_tscm_create_hwdep_device(struct snd_tscm *tscm)
hwdep->private_data = tscm;
hwdep->exclusive = true;
+ tscm->hwdep = hwdep;
+
return err;
}
diff --git a/sound/firewire/tascam/tascam.h b/sound/firewire/tascam/tascam.h
index c710496a99cf..6a411ee0dcf1 100644
--- a/sound/firewire/tascam/tascam.h
+++ b/sound/firewire/tascam/tascam.h
@@ -62,6 +62,8 @@ struct snd_fw_async_midi_port {
int consume_bytes;
};
+#define SND_TSCM_QUEUE_COUNT 16
+
struct snd_tscm {
struct snd_card *card;
struct fw_unit *unit;
@@ -92,6 +94,10 @@ struct snd_tscm {
// A cache of status information in tx isoc packets.
__be32 state[SNDRV_FIREWIRE_TASCAM_STATE_COUNT];
+ struct snd_hwdep *hwdep;
+ struct snd_firewire_tascam_change queue[SND_TSCM_QUEUE_COUNT];
+ unsigned int pull_pos;
+ unsigned int push_pos;
};
#define TSCM_ADDR_BASE 0xffff00000000ull