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authorTakashi Sakamoto2019-06-02 16:12:54 +0900
committerTakashi Iwai2019-06-11 11:36:23 +0200
commit75be43d97f55977ef34e2d59968a79aad8337199 (patch)
treefc81195d9e6e7172432426012ea8709a05f41b49 /sound/firewire
parentca8159a8e66fc78328d522f0d84d0518695d1290 (diff)
ALSA: fireface: support allocate_resources operation in ff400 protocol
This commit is a part of preparation to perform allocation/release of isochronous channels in pcm.hw_params/hw_free callbacks. This commit implements allocate_resources callback for ff400 protocol. In this callback, sampling transfer frequency is configured to the device as well. Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp> Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound/firewire')
-rw-r--r--sound/firewire/fireface/ff-protocol-former.c36
1 files changed, 16 insertions, 20 deletions
diff --git a/sound/firewire/fireface/ff-protocol-former.c b/sound/firewire/fireface/ff-protocol-former.c
index 11575d17d6cc..0517eb718f54 100644
--- a/sound/firewire/fireface/ff-protocol-former.c
+++ b/sound/firewire/fireface/ff-protocol-former.c
@@ -429,12 +429,11 @@ const struct snd_ff_protocol snd_ff_protocol_ff800 = {
#define FF400_TX_PACKET_FORMAT 0x00008010050cull
#define FF400_ISOC_COMM_STOP 0x000080100510ull
-/*
- * Fireface 400 manages isochronous channel number in 3 bit field. Therefore,
- * we can allocate between 0 and 7 channel.
- */
-static int keep_resources(struct snd_ff *ff, unsigned int rate)
+// Fireface 400 manages isochronous channel number in 3 bit field. Therefore,
+// we can allocate between 0 and 7 channel.
+static int ff400_allocate_resources(struct snd_ff *ff, unsigned int rate)
{
+ __le32 reg;
enum snd_ff_stream_mode mode;
int i;
int err;
@@ -447,11 +446,20 @@ static int keep_resources(struct snd_ff *ff, unsigned int rate)
if (i >= CIP_SFC_COUNT)
return -EINVAL;
+ // Set the number of data blocks transferred in a second.
+ reg = cpu_to_le32(rate);
+ err = snd_fw_transaction(ff->unit, TCODE_WRITE_QUADLET_REQUEST,
+ FF400_STF, &reg, sizeof(reg), 0);
+ if (err < 0)
+ return err;
+
+ msleep(100);
+
err = snd_ff_stream_get_multiplier_mode(i, &mode);
if (err < 0)
return err;
- /* Keep resources for in-stream. */
+ // Keep resources for in-stream.
ff->tx_resources.channels_mask = 0x00000000000000ffuLL;
err = fw_iso_resources_allocate(&ff->tx_resources,
amdtp_stream_get_max_payload(&ff->tx_stream),
@@ -459,7 +467,7 @@ static int keep_resources(struct snd_ff *ff, unsigned int rate)
if (err < 0)
return err;
- /* Keep resources for out-stream. */
+ // Keep resources for out-stream.
ff->rx_resources.channels_mask = 0x00000000000000ffuLL;
err = fw_iso_resources_allocate(&ff->rx_resources,
amdtp_stream_get_max_payload(&ff->rx_stream),
@@ -475,19 +483,6 @@ static int ff400_begin_session(struct snd_ff *ff, unsigned int rate)
__le32 reg;
int err;
- err = keep_resources(ff, rate);
- if (err < 0)
- return err;
-
- /* Set the number of data blocks transferred in a second. */
- reg = cpu_to_le32(rate);
- err = snd_fw_transaction(ff->unit, TCODE_WRITE_QUADLET_REQUEST,
- FF400_STF, &reg, sizeof(reg), 0);
- if (err < 0)
- return err;
-
- msleep(100);
-
/*
* Set isochronous channel and the number of quadlets of received
* packets.
@@ -589,6 +584,7 @@ const struct snd_ff_protocol snd_ff_protocol_ff400 = {
.fill_midi_msg = former_fill_midi_msg,
.get_clock = former_get_clock,
.switch_fetching_mode = former_switch_fetching_mode,
+ .allocate_resources = ff400_allocate_resources,
.begin_session = ff400_begin_session,
.finish_session = ff400_finish_session,
.dump_status = former_dump_status,