diff options
Diffstat (limited to 'sound/firewire/fireface/ff-protocol-ff400.c')
| -rw-r--r-- | sound/firewire/fireface/ff-protocol-ff400.c | 51 |
1 files changed, 46 insertions, 5 deletions
diff --git a/sound/firewire/fireface/ff-protocol-ff400.c b/sound/firewire/fireface/ff-protocol-ff400.c index 374009545936..2280fab9b3c7 100644 --- a/sound/firewire/fireface/ff-protocol-ff400.c +++ b/sound/firewire/fireface/ff-protocol-ff400.c @@ -15,19 +15,60 @@ #define FF400_TX_PACKET_FORMAT 0x00008010050cull #define FF400_ISOC_COMM_STOP 0x000080100510ull -static int ff400_begin_session(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 keep_resources(struct snd_ff *ff, unsigned int rate) { - __le32 reg; - int i, err; + enum snd_ff_stream_mode mode; + int i; + int err; - /* Check whether the given value is supported or not. */ + // Check whether the given value is supported or not. for (i = 0; i < CIP_SFC_COUNT; i++) { if (amdtp_rate_table[i] == rate) break; } - if (i == CIP_SFC_COUNT) + if (i >= CIP_SFC_COUNT) return -EINVAL; + err = snd_ff_stream_get_multiplier_mode(i, &mode); + if (err < 0) + return err; + + /* 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), + fw_parent_device(ff->unit)->max_speed); + if (err < 0) + return err; + + /* Keep resources for out-stream. */ + err = amdtp_ff_set_parameters(&ff->rx_stream, rate, + ff->spec->pcm_playback_channels[mode]); + if (err < 0) + return err; + ff->rx_resources.channels_mask = 0x00000000000000ffuLL; + err = fw_iso_resources_allocate(&ff->rx_resources, + amdtp_stream_get_max_payload(&ff->rx_stream), + fw_parent_device(ff->unit)->max_speed); + if (err < 0) + fw_iso_resources_free(&ff->tx_resources); + + return err; +} + +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, |