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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>
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parent
ca8159a8e6
commit
75be43d97f
1 changed files with 16 additions and 20 deletions
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@ -429,12 +429,11 @@ const struct snd_ff_protocol snd_ff_protocol_ff800 = {
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#define FF400_TX_PACKET_FORMAT 0x00008010050cull
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#define FF400_ISOC_COMM_STOP 0x000080100510ull
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/*
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* Fireface 400 manages isochronous channel number in 3 bit field. Therefore,
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* we can allocate between 0 and 7 channel.
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*/
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static int keep_resources(struct snd_ff *ff, unsigned int rate)
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// Fireface 400 manages isochronous channel number in 3 bit field. Therefore,
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// we can allocate between 0 and 7 channel.
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static int ff400_allocate_resources(struct snd_ff *ff, unsigned int rate)
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{
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__le32 reg;
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enum snd_ff_stream_mode mode;
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int i;
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int err;
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@ -447,11 +446,20 @@ static int keep_resources(struct snd_ff *ff, unsigned int rate)
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if (i >= CIP_SFC_COUNT)
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return -EINVAL;
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// Set the number of data blocks transferred in a second.
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reg = cpu_to_le32(rate);
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err = snd_fw_transaction(ff->unit, TCODE_WRITE_QUADLET_REQUEST,
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FF400_STF, ®, sizeof(reg), 0);
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if (err < 0)
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return err;
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msleep(100);
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err = snd_ff_stream_get_multiplier_mode(i, &mode);
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if (err < 0)
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return err;
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/* Keep resources for in-stream. */
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// Keep resources for in-stream.
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ff->tx_resources.channels_mask = 0x00000000000000ffuLL;
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err = fw_iso_resources_allocate(&ff->tx_resources,
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amdtp_stream_get_max_payload(&ff->tx_stream),
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@ -459,7 +467,7 @@ static int keep_resources(struct snd_ff *ff, unsigned int rate)
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if (err < 0)
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return err;
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/* Keep resources for out-stream. */
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// Keep resources for out-stream.
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ff->rx_resources.channels_mask = 0x00000000000000ffuLL;
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err = fw_iso_resources_allocate(&ff->rx_resources,
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amdtp_stream_get_max_payload(&ff->rx_stream),
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@ -475,19 +483,6 @@ static int ff400_begin_session(struct snd_ff *ff, unsigned int rate)
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__le32 reg;
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int err;
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err = keep_resources(ff, rate);
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if (err < 0)
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return err;
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/* Set the number of data blocks transferred in a second. */
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reg = cpu_to_le32(rate);
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err = snd_fw_transaction(ff->unit, TCODE_WRITE_QUADLET_REQUEST,
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FF400_STF, ®, sizeof(reg), 0);
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if (err < 0)
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return err;
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msleep(100);
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/*
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* Set isochronous channel and the number of quadlets of received
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* packets.
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@ -589,6 +584,7 @@ const struct snd_ff_protocol snd_ff_protocol_ff400 = {
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.fill_midi_msg = former_fill_midi_msg,
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.get_clock = former_get_clock,
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.switch_fetching_mode = former_switch_fetching_mode,
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.allocate_resources = ff400_allocate_resources,
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.begin_session = ff400_begin_session,
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.finish_session = ff400_finish_session,
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.dump_status = former_dump_status,
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