369 lines
8.3 KiB
C
369 lines
8.3 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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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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#include "./fireworks.h"
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#define CALLBACK_TIMEOUT 100
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static int 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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return err;
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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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return err;
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}
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if (stream == &efw->tx_stream) {
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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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// 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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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.flags |= CIP_UNALIGHED_DBC;
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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.ctx_data.tx.dbc_interval = 8;
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}
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return err;
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}
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static int start_stream(struct snd_efw *efw, struct amdtp_stream *stream,
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unsigned int rate)
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{
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struct cmp_connection *conn;
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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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else
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conn = &efw->in_conn;
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// Establish connection via CMP.
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err = cmp_connection_establish(conn);
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if (err < 0)
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return err;
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// Start amdtp stream.
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err = amdtp_domain_add_stream(&efw->domain, stream,
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conn->resources.channel, conn->speed);
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if (err < 0) {
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cmp_connection_break(conn);
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return err;
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}
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return 0;
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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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static void destroy_stream(struct snd_efw *efw, struct amdtp_stream *stream)
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{
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amdtp_stream_destroy(stream);
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if (stream == &efw->tx_stream)
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cmp_connection_destroy(&efw->out_conn);
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else
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cmp_connection_destroy(&efw->in_conn);
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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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return err;
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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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return err;
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}
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err = amdtp_domain_init(&efw->domain);
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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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return err;
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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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return err;
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}
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static int keep_resources(struct snd_efw *efw, struct amdtp_stream *stream,
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unsigned int rate, unsigned int mode)
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{
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unsigned int pcm_channels;
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unsigned int midi_ports;
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struct cmp_connection *conn;
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int err;
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if (stream == &efw->tx_stream) {
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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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conn = &efw->out_conn;
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} else {
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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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conn = &efw->in_conn;
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}
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err = amdtp_am824_set_parameters(stream, rate, pcm_channels,
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midi_ports, false);
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if (err < 0)
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return err;
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return cmp_connection_reserve(conn, amdtp_stream_get_max_payload(stream));
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}
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int snd_efw_stream_reserve_duplex(struct snd_efw *efw, unsigned int rate,
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unsigned int frames_per_period,
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unsigned int frames_per_buffer)
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{
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unsigned int curr_rate;
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int err;
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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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err = check_connection_used_by_others(efw, &efw->rx_stream);
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if (err < 0)
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return err;
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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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return err;
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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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amdtp_domain_stop(&efw->domain);
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cmp_connection_break(&efw->out_conn);
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cmp_connection_break(&efw->in_conn);
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cmp_connection_release(&efw->out_conn);
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cmp_connection_release(&efw->in_conn);
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}
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if (efw->substreams_counter == 0 || rate != curr_rate) {
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unsigned int mode;
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err = snd_efw_command_set_sampling_rate(efw, rate);
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if (err < 0)
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return err;
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err = snd_efw_get_multiplier_mode(rate, &mode);
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if (err < 0)
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return err;
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err = keep_resources(efw, &efw->tx_stream, rate, mode);
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if (err < 0)
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return err;
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err = keep_resources(efw, &efw->rx_stream, rate, mode);
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if (err < 0) {
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cmp_connection_release(&efw->in_conn);
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return err;
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}
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err = amdtp_domain_set_events_per_period(&efw->domain,
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frames_per_period, frames_per_buffer);
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if (err < 0) {
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cmp_connection_release(&efw->in_conn);
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cmp_connection_release(&efw->out_conn);
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return err;
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}
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}
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return 0;
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}
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int snd_efw_stream_start_duplex(struct snd_efw *efw)
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{
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unsigned int rate;
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int err = 0;
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// Need no substreams.
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if (efw->substreams_counter == 0)
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return -EIO;
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if (amdtp_streaming_error(&efw->rx_stream) ||
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amdtp_streaming_error(&efw->tx_stream)) {
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amdtp_domain_stop(&efw->domain);
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cmp_connection_break(&efw->out_conn);
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cmp_connection_break(&efw->in_conn);
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}
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err = snd_efw_command_get_sampling_rate(efw, &rate);
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if (err < 0)
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return err;
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if (!amdtp_stream_running(&efw->rx_stream)) {
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err = start_stream(efw, &efw->rx_stream, rate);
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if (err < 0)
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goto error;
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err = start_stream(efw, &efw->tx_stream, rate);
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if (err < 0)
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goto error;
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err = amdtp_domain_start(&efw->domain, 0);
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if (err < 0)
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goto error;
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// Wait first callback.
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if (!amdtp_stream_wait_callback(&efw->rx_stream,
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CALLBACK_TIMEOUT) ||
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!amdtp_stream_wait_callback(&efw->tx_stream,
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CALLBACK_TIMEOUT)) {
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err = -ETIMEDOUT;
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goto error;
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}
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}
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return 0;
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error:
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amdtp_domain_stop(&efw->domain);
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cmp_connection_break(&efw->out_conn);
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cmp_connection_break(&efw->in_conn);
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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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if (efw->substreams_counter == 0) {
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amdtp_domain_stop(&efw->domain);
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cmp_connection_break(&efw->out_conn);
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cmp_connection_break(&efw->in_conn);
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cmp_connection_release(&efw->out_conn);
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cmp_connection_release(&efw->in_conn);
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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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amdtp_domain_stop(&efw->domain);
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cmp_connection_break(&efw->out_conn);
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cmp_connection_break(&efw->in_conn);
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amdtp_stream_pcm_abort(&efw->rx_stream);
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amdtp_stream_pcm_abort(&efw->tx_stream);
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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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amdtp_domain_destroy(&efw->domain);
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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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