372 lines
8.4 KiB
C
372 lines
8.4 KiB
C
/*
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* fireworks_stream.c - a part of driver for Fireworks based devices
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*
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* Copyright (c) 2013-2014 Takashi Sakamoto
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*
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* Licensed under the terms of the GNU General Public License, version 2.
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*/
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#include "./fireworks.h"
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#define CALLBACK_TIMEOUT 100
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static int
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init_stream(struct snd_efw *efw, struct amdtp_stream *stream)
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{
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struct cmp_connection *conn;
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enum cmp_direction c_dir;
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enum amdtp_stream_direction s_dir;
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int err;
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if (stream == &efw->tx_stream) {
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conn = &efw->out_conn;
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c_dir = CMP_OUTPUT;
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s_dir = AMDTP_IN_STREAM;
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} else {
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conn = &efw->in_conn;
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c_dir = CMP_INPUT;
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s_dir = AMDTP_OUT_STREAM;
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}
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err = cmp_connection_init(conn, efw->unit, c_dir, 0);
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if (err < 0)
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goto end;
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err = amdtp_am824_init(stream, efw->unit, s_dir, CIP_BLOCKING);
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if (err < 0) {
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amdtp_stream_destroy(stream);
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cmp_connection_destroy(conn);
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}
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end:
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return err;
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}
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static void
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stop_stream(struct snd_efw *efw, struct amdtp_stream *stream)
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{
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amdtp_stream_pcm_abort(stream);
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amdtp_stream_stop(stream);
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if (stream == &efw->tx_stream)
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cmp_connection_break(&efw->out_conn);
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else
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cmp_connection_break(&efw->in_conn);
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}
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static int
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start_stream(struct snd_efw *efw, struct amdtp_stream *stream,
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unsigned int sampling_rate)
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{
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struct cmp_connection *conn;
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unsigned int mode, pcm_channels, midi_ports;
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int err;
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err = snd_efw_get_multiplier_mode(sampling_rate, &mode);
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if (err < 0)
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goto end;
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if (stream == &efw->tx_stream) {
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conn = &efw->out_conn;
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pcm_channels = efw->pcm_capture_channels[mode];
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midi_ports = efw->midi_out_ports;
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} else {
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conn = &efw->in_conn;
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pcm_channels = efw->pcm_playback_channels[mode];
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midi_ports = efw->midi_in_ports;
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}
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err = amdtp_am824_set_parameters(stream, sampling_rate,
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pcm_channels, midi_ports, false);
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if (err < 0)
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goto end;
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/* establish connection via CMP */
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err = cmp_connection_establish(conn,
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amdtp_stream_get_max_payload(stream));
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if (err < 0)
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goto end;
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/* start amdtp stream */
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err = amdtp_stream_start(stream,
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conn->resources.channel,
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conn->speed);
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if (err < 0) {
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stop_stream(efw, stream);
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goto end;
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}
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/* wait first callback */
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if (!amdtp_stream_wait_callback(stream, CALLBACK_TIMEOUT)) {
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stop_stream(efw, stream);
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err = -ETIMEDOUT;
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}
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end:
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return err;
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}
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/*
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* This function should be called before starting the stream or after stopping
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* the streams.
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*/
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static void
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destroy_stream(struct snd_efw *efw, struct amdtp_stream *stream)
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{
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struct cmp_connection *conn;
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if (stream == &efw->tx_stream)
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conn = &efw->out_conn;
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else
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conn = &efw->in_conn;
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amdtp_stream_destroy(stream);
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cmp_connection_destroy(&efw->out_conn);
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}
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static int
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get_sync_mode(struct snd_efw *efw, enum cip_flags *sync_mode)
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{
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enum snd_efw_clock_source clock_source;
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int err;
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err = snd_efw_command_get_clock_source(efw, &clock_source);
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if (err < 0)
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return err;
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if (clock_source == SND_EFW_CLOCK_SOURCE_SYTMATCH)
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return -ENOSYS;
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*sync_mode = CIP_SYNC_TO_DEVICE;
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return 0;
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}
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static int
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check_connection_used_by_others(struct snd_efw *efw, struct amdtp_stream *s)
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{
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struct cmp_connection *conn;
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bool used;
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int err;
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if (s == &efw->tx_stream)
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conn = &efw->out_conn;
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else
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conn = &efw->in_conn;
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err = cmp_connection_check_used(conn, &used);
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if ((err >= 0) && used && !amdtp_stream_running(s)) {
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dev_err(&efw->unit->device,
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"Connection established by others: %cPCR[%d]\n",
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(conn->direction == CMP_OUTPUT) ? 'o' : 'i',
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conn->pcr_index);
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err = -EBUSY;
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}
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return err;
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}
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int snd_efw_stream_init_duplex(struct snd_efw *efw)
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{
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int err;
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err = init_stream(efw, &efw->tx_stream);
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if (err < 0)
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goto end;
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/* Fireworks transmits NODATA packets with TAG0. */
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efw->tx_stream.flags |= CIP_EMPTY_WITH_TAG0;
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/* Fireworks has its own meaning for dbc. */
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efw->tx_stream.flags |= CIP_DBC_IS_END_EVENT;
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/* Fireworks reset dbc at bus reset. */
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efw->tx_stream.flags |= CIP_SKIP_DBC_ZERO_CHECK;
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/*
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* But Recent firmwares starts packets with non-zero dbc.
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* Driver version 5.7.6 installs firmware version 5.7.3.
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*/
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if (efw->is_fireworks3 &&
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(efw->firmware_version == 0x5070000 ||
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efw->firmware_version == 0x5070300 ||
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efw->firmware_version == 0x5080000))
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efw->tx_stream.tx_first_dbc = 0x02;
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/* AudioFire9 always reports wrong dbs. */
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if (efw->is_af9)
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efw->tx_stream.flags |= CIP_WRONG_DBS;
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/* Firmware version 5.5 reports fixed interval for dbc. */
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if (efw->firmware_version == 0x5050000)
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efw->tx_stream.tx_dbc_interval = 8;
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err = init_stream(efw, &efw->rx_stream);
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if (err < 0) {
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destroy_stream(efw, &efw->tx_stream);
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goto end;
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}
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/* set IEC61883 compliant mode (actually not fully compliant...) */
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err = snd_efw_command_set_tx_mode(efw, SND_EFW_TRANSPORT_MODE_IEC61883);
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if (err < 0) {
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destroy_stream(efw, &efw->tx_stream);
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destroy_stream(efw, &efw->rx_stream);
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}
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end:
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return err;
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}
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int snd_efw_stream_start_duplex(struct snd_efw *efw, unsigned int rate)
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{
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struct amdtp_stream *master, *slave;
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unsigned int slave_substreams;
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enum cip_flags sync_mode;
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unsigned int curr_rate;
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int err = 0;
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/* Need no substreams */
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if (efw->playback_substreams == 0 && efw->capture_substreams == 0)
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goto end;
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err = get_sync_mode(efw, &sync_mode);
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if (err < 0)
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goto end;
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if (sync_mode == CIP_SYNC_TO_DEVICE) {
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master = &efw->tx_stream;
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slave = &efw->rx_stream;
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slave_substreams = efw->playback_substreams;
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} else {
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master = &efw->rx_stream;
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slave = &efw->tx_stream;
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slave_substreams = efw->capture_substreams;
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}
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/*
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* Considering JACK/FFADO streaming:
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* TODO: This can be removed hwdep functionality becomes popular.
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*/
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err = check_connection_used_by_others(efw, master);
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if (err < 0)
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goto end;
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/* packet queueing error */
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if (amdtp_streaming_error(slave))
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stop_stream(efw, slave);
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if (amdtp_streaming_error(master))
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stop_stream(efw, master);
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/* stop streams if rate is different */
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err = snd_efw_command_get_sampling_rate(efw, &curr_rate);
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if (err < 0)
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goto end;
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if (rate == 0)
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rate = curr_rate;
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if (rate != curr_rate) {
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stop_stream(efw, slave);
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stop_stream(efw, master);
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}
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/* master should be always running */
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if (!amdtp_stream_running(master)) {
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amdtp_stream_set_sync(sync_mode, master, slave);
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efw->master = master;
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err = snd_efw_command_set_sampling_rate(efw, rate);
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if (err < 0)
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goto end;
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err = start_stream(efw, master, rate);
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if (err < 0) {
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dev_err(&efw->unit->device,
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"fail to start AMDTP master stream:%d\n", err);
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goto end;
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}
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}
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/* start slave if needed */
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if (slave_substreams > 0 && !amdtp_stream_running(slave)) {
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err = start_stream(efw, slave, rate);
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if (err < 0) {
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dev_err(&efw->unit->device,
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"fail to start AMDTP slave stream:%d\n", err);
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stop_stream(efw, master);
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}
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}
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end:
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return err;
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}
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void snd_efw_stream_stop_duplex(struct snd_efw *efw)
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{
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struct amdtp_stream *master, *slave;
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unsigned int master_substreams, slave_substreams;
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if (efw->master == &efw->rx_stream) {
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slave = &efw->tx_stream;
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master = &efw->rx_stream;
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slave_substreams = efw->capture_substreams;
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master_substreams = efw->playback_substreams;
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} else {
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slave = &efw->rx_stream;
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master = &efw->tx_stream;
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slave_substreams = efw->playback_substreams;
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master_substreams = efw->capture_substreams;
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}
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if (slave_substreams == 0) {
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stop_stream(efw, slave);
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if (master_substreams == 0)
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stop_stream(efw, master);
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}
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}
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void snd_efw_stream_update_duplex(struct snd_efw *efw)
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{
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if ((cmp_connection_update(&efw->out_conn) < 0) ||
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(cmp_connection_update(&efw->in_conn) < 0)) {
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mutex_lock(&efw->mutex);
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stop_stream(efw, &efw->rx_stream);
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stop_stream(efw, &efw->tx_stream);
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mutex_unlock(&efw->mutex);
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} else {
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amdtp_stream_update(&efw->rx_stream);
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amdtp_stream_update(&efw->tx_stream);
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}
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}
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void snd_efw_stream_destroy_duplex(struct snd_efw *efw)
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{
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destroy_stream(efw, &efw->rx_stream);
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destroy_stream(efw, &efw->tx_stream);
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}
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void snd_efw_stream_lock_changed(struct snd_efw *efw)
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{
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efw->dev_lock_changed = true;
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wake_up(&efw->hwdep_wait);
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}
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int snd_efw_stream_lock_try(struct snd_efw *efw)
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{
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int err;
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spin_lock_irq(&efw->lock);
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/* user land lock this */
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if (efw->dev_lock_count < 0) {
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err = -EBUSY;
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goto end;
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}
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/* this is the first time */
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if (efw->dev_lock_count++ == 0)
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snd_efw_stream_lock_changed(efw);
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err = 0;
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end:
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spin_unlock_irq(&efw->lock);
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return err;
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}
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void snd_efw_stream_lock_release(struct snd_efw *efw)
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{
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spin_lock_irq(&efw->lock);
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if (WARN_ON(efw->dev_lock_count <= 0))
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goto end;
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if (--efw->dev_lock_count == 0)
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snd_efw_stream_lock_changed(efw);
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end:
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spin_unlock_irq(&efw->lock);
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}
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