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ALSA: fireface: support allocate_resources operation in ff400 protocol

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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>
This commit is contained in:
Takashi Sakamoto 2019-06-02 16:12:54 +09:00 committed by Takashi Iwai
parent ca8159a8e6
commit 75be43d97f
1 changed files with 16 additions and 20 deletions
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36
sound/firewire/fireface/ff-protocol-former.c
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@ -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,