// SPDX-License-Identifier: GPL-2.0-only
/*
* fireworks_stream.c - a part of driver for Fireworks based devices
*
* Copyright (c) 2013-2014 Takashi Sakamoto
*/
#include "./fireworks.h"
#define READY_TIMEOUT_MS 1000
static int init_stream(struct snd_efw *efw, struct amdtp_stream *stream)
{
struct cmp_connection *conn;
enum cmp_direction c_dir;
enum amdtp_stream_direction s_dir;
int err;
if (stream == &efw->tx_stream) {
conn = &efw->out_conn;
c_dir = CMP_OUTPUT;
s_dir = AMDTP_IN_STREAM;
} else {
conn = &efw->in_conn;
c_dir = CMP_INPUT;
s_dir = AMDTP_OUT_STREAM;
}
err = cmp_connection_init(conn, efw->unit, c_dir, 0);
if (err < 0)
return err;
err = amdtp_am824_init(stream, efw->unit, s_dir, CIP_BLOCKING | CIP_UNAWARE_SYT);
if (err < 0) {
amdtp_stream_destroy(stream);
cmp_connection_destroy(conn);
return err;
}
if (stream == &efw->tx_stream) {
// Fireworks transmits NODATA packets with TAG0.
efw->tx_stream.flags |= CIP_EMPTY_WITH_TAG0;
// Fireworks has its own meaning for dbc.
efw->tx_stream.flags |= CIP_DBC_IS_END_EVENT;
// Fireworks reset dbc at bus reset.
efw->tx_stream.flags |= CIP_SKIP_DBC_ZERO_CHECK;
// But Recent firmwares starts packets with non-zero dbc.
// Driver version 5.7.6 installs firmware version 5.7.3.
if (efw->is_fireworks3 &&
(efw->firmware_version == 0x5070000 ||
efw->firmware_version == 0x5070300 ||
efw->firmware_version == 0x5080000))
efw->tx_stream.flags |= CIP_UNALIGHED_DBC;
// AudioFire9 always reports wrong dbs. Onyx 1200F with the latest firmware (v4.6.0)
// also report wrong dbs at 88.2 kHz or greater.
if (efw->is_af9 || efw->firmware_version == 0x4060000)
efw->tx_stream.flags |= CIP_WRONG_DBS;
// Firmware version 5.5 reports fixed interval for dbc.
if (efw->firmware_version == 0x5050000)
efw->tx_stream.ctx_data.tx.dbc_interval = 8;
}
return err;
}
static int start_stream(struct snd_efw *efw, struct amdtp_stream *stream,
unsigned int rate)
{
struct cmp_connection *conn;
int err;
if (stream == &efw->tx_stream)
conn = &efw->out_conn;
else
conn = &efw->in_conn;
// Establish connection via CMP.
err = cmp_connection_establish(conn);
if (err < 0)
return err;
// Start amdtp stream.
err = amdtp_domain_add_stream(&efw->domain, stream,
conn->resources.channel, conn->speed);
if (err < 0) {
cmp_connection_break(conn);
return err;
}
return 0;
}
// This function should be called before starting the stream or after stopping
// the streams.
static void destroy_stream(struct snd_efw *efw, struct amdtp_stream *stream)
{
amdtp_stream_destroy(stream);
if (stream == &efw->tx_stream)
cmp_connection_destroy(&efw->out_conn);
else
cmp_connection_destroy(&efw->in_conn);
}
static int
check_connection_used_by_others(struct snd_efw *efw, struct amdtp_stream *s)
{
struct cmp_connection *conn;
bool used;
int err;
if (s == &efw->tx_stream)
conn = &efw->out_conn;
else
conn = &efw->in_conn;
err = cmp_connection_check_used(conn, &used);
if ((err >= 0) && used && !amdtp_stream_running(s)) {
dev_err(&efw->unit->device,
"Connection established by others: %cPCR[%d]\n",
(conn->direction == CMP_OUTPUT) ? 'o' : 'i',
conn->pcr_index);
err = -EBUSY;
}
return err;
}
int snd_efw_stream_init_duplex(struct snd_efw *efw)
{
int err;
err = init_stream(efw, &efw->tx_stream);
if (err < 0)
return err;
err = init_stream(efw, &efw->rx_stream);
if (err < 0) {
destroy_stream(efw, &efw->tx_stream);
return err;
}
err = amdtp_domain_init(&efw->domain);
if (err < 0) {
destroy_stream(efw, &efw->tx_stream);
destroy_stream(efw, &efw->rx_stream);
return err;
}
// set IEC61883 compliant mode (actually not fully compliant...).
err = snd_efw_command_set_tx_mode(efw, SND_EFW_TRANSPORT_MODE_IEC61883);
if (err < 0) {
destroy_stream(efw, &efw->tx_stream);
destroy_stream(efw, &efw->rx_stream);
}
return err;
}
static int keep_resources(struct snd_efw *efw, struct amdtp_stream *stream,
unsigned int rate, unsigned int mode)
{
unsigned int pcm_channels;
unsigned int midi_ports;
struct cmp_connection *conn;
int err;
if (stream == &efw->tx_stream) {
pcm_channels = efw->pcm_capture_channels[mode];
midi_ports = efw->midi_out_ports;
conn = &efw->out_conn;
} else {
pcm_channels = efw->pcm_playback_channels[mode];
midi_ports = efw->midi_in_ports;
conn = &efw->in_conn;
}
err = amdtp_am824_set_parameters(stream, rate, pcm_channels,
midi_ports, false);
if (err < 0)
return err;
return cmp_connection_reserve(conn, amdtp_stream_get_max_payload(stream));
}
int snd_efw_stream_reserve_duplex(struct snd_efw *efw, unsigned int rate,
unsigned int frames_per_period,
unsigned int frames_per_buffer)
{
unsigned int curr_rate;
int err;
// Considering JACK/FFADO streaming:
// TODO: This can be removed hwdep functionality becomes popular.
err = check_connection_used_by_others(efw, &efw->rx_stream);
if (err < 0)
return err;
// stop streams if rate is different.
err = snd_efw_command_get_sampling_rate(efw, &curr_rate);
if (err < 0)
return err;
if (rate == 0)
rate = curr_rate;
if (rate != curr_rate) {
amdtp_domain_stop(&efw->domain);
cmp_connection_break(&efw->out_conn);
cmp_connection_break(&efw->in_conn);
cmp_connection_release(&efw->out_conn);
cmp_connection_release(&efw->in_conn);
}
if (efw->substreams_counter == 0 || rate != curr_rate) {
unsigned int mode;
err = snd_efw_command_set_sampling_rate(efw, rate);
if (err < 0)
return err;
err = snd_efw_get_multiplier_mode(rate, &mode);
if (err < 0)
return err;
err = keep_resources(efw, &efw->tx_stream, rate, mode);
if (err < 0)
return err;
err = keep_resources(efw, &efw->rx_stream, rate, mode);
if (err < 0) {
cmp_connection_release(&efw->in_conn);
return err;
}
err = amdtp_domain_set_events_per_period(&efw->domain,
frames_per_period, frames_per_buffer);
if (err < 0) {
cmp_connection_release(&efw->in_conn);
cmp_connection_release(&efw->out_conn);
return err;
}
}
return 0;
}
int snd_efw_stream_start_duplex(struct snd_efw *efw)
{
unsigned int rate;
int err = 0;
// Need no substreams.
if (efw->substreams_counter == 0)
return -EIO;
if (amdtp_streaming_error(&efw->rx_stream) ||
amdtp_streaming_error(&efw->tx_stream)) {
amdtp_domain_stop(&efw->domain);
cmp_connection_break(&efw->out_conn);
cmp_connection_break(&efw->in_conn);
}
err = snd_efw_command_get_sampling_rate(efw, &rate);
if (err < 0)
return err;
if (!amdtp_stream_running(&efw->rx_stream)) {
unsigned int tx_init_skip_cycles;
// Audiofire 2/4 skip an isochronous cycle several thousands after starting
// packet transmission.
if (efw->is_fireworks3 && !efw->is_af9)
tx_init_skip_cycles = 6000;
else
tx_init_skip_cycles = 0;
err = start_stream(efw, &efw->rx_stream, rate);
if (err < 0)
goto error;
err = start_stream(efw, &efw->tx_stream, rate);
if (err < 0)
goto error;
// NOTE: The device ignores presentation time expressed by the value of syt field
// of CIP header in received packets. The sequence of the number of data blocks per
// packet is important for media clock recovery.
err = amdtp_domain_start(&efw->domain, tx_init_skip_cycles, true, false);
if (err < 0)
goto error;
if (!amdtp_domain_wait_ready(&efw->domain, READY_TIMEOUT_MS)) {
err = -ETIMEDOUT;
goto error;
}
}
return 0;
error:
amdtp_domain_stop(&efw->domain);
cmp_connection_break(&efw->out_conn);
cmp_connection_break(&efw->in_conn);
return err;
}
void snd_efw_stream_stop_duplex(struct snd_efw *efw)
{
if (efw->substreams_counter == 0) {
amdtp_domain_stop(&efw->domain);
cmp_connection_break(&efw->out_conn);
cmp_connection_break(&efw->in_conn);
cmp_connection_release(&efw->out_conn);
cmp_connection_release(&efw->in_conn);
}
}
void snd_efw_stream_update_duplex(struct snd_efw *efw)
{
amdtp_domain_stop(&efw->domain);
cmp_connection_break(&efw->out_conn);
cmp_connection_break(&efw->in_conn);
amdtp_stream_pcm_abort(&efw->rx_stream);
amdtp_stream_pcm_abort(&efw->tx_stream);
}
void snd_efw_stream_destroy_duplex(struct snd_efw *efw)
{
amdtp_domain_destroy(&efw->domain);
destroy_stream(efw, &efw->rx_stream);
destroy_stream(efw, &efw->tx_stream);
}
void snd_efw_stream_lock_changed(struct snd_efw *efw)
{
efw->dev_lock_changed = true;
wake_up(&efw->hwdep_wait);
}
int snd_efw_stream_lock_try(struct snd_efw *efw)
{
int err;
spin_lock_irq(&efw->lock);
/* user land lock this */
if (efw->dev_lock_count < 0) {
err = -EBUSY;
goto end;
}
/* this is the first time */
if (efw->dev_lock_count++ == 0)
snd_efw_stream_lock_changed(efw);
err = 0;
end:
spin_unlock_irq(&efw->lock);
return err;
}
void snd_efw_stream_lock_release(struct snd_efw *efw)
{
spin_lock_irq(&efw->lock);
if (WARN_ON(efw->dev_lock_count <= 0))
goto end;
if (--efw->dev_lock_count == 0)
snd_efw_stream_lock_changed(efw);
end:
spin_unlock_irq(&efw->lock);
}
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