1 // SPDX-License-Identifier: GPL-2.0-only
3 * tascam-pcm.c - a part of driver for TASCAM FireWire series
5 * Copyright (c) 2015 Takashi Sakamoto
10 static int pcm_init_hw_params(struct snd_tscm *tscm,
11 struct snd_pcm_substream *substream)
13 struct snd_pcm_runtime *runtime = substream->runtime;
14 struct snd_pcm_hardware *hw = &runtime->hw;
15 struct amdtp_stream *stream;
16 unsigned int pcm_channels;
18 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) {
19 runtime->hw.formats = SNDRV_PCM_FMTBIT_S32;
20 stream = &tscm->tx_stream;
21 pcm_channels = tscm->spec->pcm_capture_analog_channels;
23 runtime->hw.formats = SNDRV_PCM_FMTBIT_S32;
24 stream = &tscm->rx_stream;
25 pcm_channels = tscm->spec->pcm_playback_analog_channels;
28 if (tscm->spec->has_adat)
30 if (tscm->spec->has_spdif)
32 runtime->hw.channels_min = runtime->hw.channels_max = pcm_channels;
34 hw->rates = SNDRV_PCM_RATE_44100 |
35 SNDRV_PCM_RATE_48000 |
36 SNDRV_PCM_RATE_88200 |
38 snd_pcm_limit_hw_rates(runtime);
40 return amdtp_tscm_add_pcm_hw_constraints(stream, runtime);
43 static int pcm_open(struct snd_pcm_substream *substream)
45 struct snd_tscm *tscm = substream->private_data;
46 struct amdtp_domain *d = &tscm->domain;
47 enum snd_tscm_clock clock;
50 err = snd_tscm_stream_lock_try(tscm);
54 err = pcm_init_hw_params(tscm, substream);
58 err = snd_tscm_stream_get_clock(tscm, &clock);
62 mutex_lock(&tscm->mutex);
64 // When source of clock is not internal or any stream is reserved for
65 // transmission of PCM frames, the available sampling rate is limited
67 if (clock != SND_TSCM_CLOCK_INTERNAL || tscm->substreams_counter > 0) {
68 unsigned int frames_per_period = d->events_per_period;
69 unsigned int frames_per_buffer = d->events_per_buffer;
72 err = snd_tscm_stream_get_rate(tscm, &rate);
74 mutex_unlock(&tscm->mutex);
77 substream->runtime->hw.rate_min = rate;
78 substream->runtime->hw.rate_max = rate;
80 err = snd_pcm_hw_constraint_minmax(substream->runtime,
81 SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
82 frames_per_period, frames_per_period);
84 mutex_unlock(&tscm->mutex);
88 err = snd_pcm_hw_constraint_minmax(substream->runtime,
89 SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
90 frames_per_buffer, frames_per_buffer);
92 mutex_unlock(&tscm->mutex);
97 mutex_unlock(&tscm->mutex);
99 snd_pcm_set_sync(substream);
103 snd_tscm_stream_lock_release(tscm);
107 static int pcm_close(struct snd_pcm_substream *substream)
109 struct snd_tscm *tscm = substream->private_data;
111 snd_tscm_stream_lock_release(tscm);
116 static int pcm_hw_params(struct snd_pcm_substream *substream,
117 struct snd_pcm_hw_params *hw_params)
119 struct snd_tscm *tscm = substream->private_data;
122 err = snd_pcm_lib_alloc_vmalloc_buffer(substream,
123 params_buffer_bytes(hw_params));
127 if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN) {
128 unsigned int rate = params_rate(hw_params);
129 unsigned int frames_per_period = params_period_size(hw_params);
130 unsigned int frames_per_buffer = params_buffer_size(hw_params);
132 mutex_lock(&tscm->mutex);
133 err = snd_tscm_stream_reserve_duplex(tscm, rate,
134 frames_per_period, frames_per_buffer);
136 ++tscm->substreams_counter;
137 mutex_unlock(&tscm->mutex);
143 static int pcm_hw_free(struct snd_pcm_substream *substream)
145 struct snd_tscm *tscm = substream->private_data;
147 mutex_lock(&tscm->mutex);
149 if (substream->runtime->status->state != SNDRV_PCM_STATE_OPEN)
150 --tscm->substreams_counter;
152 snd_tscm_stream_stop_duplex(tscm);
154 mutex_unlock(&tscm->mutex);
156 return snd_pcm_lib_free_vmalloc_buffer(substream);
159 static int pcm_capture_prepare(struct snd_pcm_substream *substream)
161 struct snd_tscm *tscm = substream->private_data;
162 struct snd_pcm_runtime *runtime = substream->runtime;
165 mutex_lock(&tscm->mutex);
167 err = snd_tscm_stream_start_duplex(tscm, runtime->rate);
169 amdtp_stream_pcm_prepare(&tscm->tx_stream);
171 mutex_unlock(&tscm->mutex);
176 static int pcm_playback_prepare(struct snd_pcm_substream *substream)
178 struct snd_tscm *tscm = substream->private_data;
179 struct snd_pcm_runtime *runtime = substream->runtime;
182 mutex_lock(&tscm->mutex);
184 err = snd_tscm_stream_start_duplex(tscm, runtime->rate);
186 amdtp_stream_pcm_prepare(&tscm->rx_stream);
188 mutex_unlock(&tscm->mutex);
193 static int pcm_capture_trigger(struct snd_pcm_substream *substream, int cmd)
195 struct snd_tscm *tscm = substream->private_data;
198 case SNDRV_PCM_TRIGGER_START:
199 amdtp_stream_pcm_trigger(&tscm->tx_stream, substream);
201 case SNDRV_PCM_TRIGGER_STOP:
202 amdtp_stream_pcm_trigger(&tscm->tx_stream, NULL);
211 static int pcm_playback_trigger(struct snd_pcm_substream *substream, int cmd)
213 struct snd_tscm *tscm = substream->private_data;
216 case SNDRV_PCM_TRIGGER_START:
217 amdtp_stream_pcm_trigger(&tscm->rx_stream, substream);
219 case SNDRV_PCM_TRIGGER_STOP:
220 amdtp_stream_pcm_trigger(&tscm->rx_stream, NULL);
229 static snd_pcm_uframes_t pcm_capture_pointer(struct snd_pcm_substream *sbstrm)
231 struct snd_tscm *tscm = sbstrm->private_data;
233 return amdtp_stream_pcm_pointer(&tscm->tx_stream);
236 static snd_pcm_uframes_t pcm_playback_pointer(struct snd_pcm_substream *sbstrm)
238 struct snd_tscm *tscm = sbstrm->private_data;
240 return amdtp_stream_pcm_pointer(&tscm->rx_stream);
243 static int pcm_capture_ack(struct snd_pcm_substream *substream)
245 struct snd_tscm *tscm = substream->private_data;
247 return amdtp_stream_pcm_ack(&tscm->tx_stream);
250 static int pcm_playback_ack(struct snd_pcm_substream *substream)
252 struct snd_tscm *tscm = substream->private_data;
254 return amdtp_stream_pcm_ack(&tscm->rx_stream);
257 int snd_tscm_create_pcm_devices(struct snd_tscm *tscm)
259 static const struct snd_pcm_ops capture_ops = {
262 .ioctl = snd_pcm_lib_ioctl,
263 .hw_params = pcm_hw_params,
264 .hw_free = pcm_hw_free,
265 .prepare = pcm_capture_prepare,
266 .trigger = pcm_capture_trigger,
267 .pointer = pcm_capture_pointer,
268 .ack = pcm_capture_ack,
269 .page = snd_pcm_lib_get_vmalloc_page,
271 static const struct snd_pcm_ops playback_ops = {
274 .ioctl = snd_pcm_lib_ioctl,
275 .hw_params = pcm_hw_params,
276 .hw_free = pcm_hw_free,
277 .prepare = pcm_playback_prepare,
278 .trigger = pcm_playback_trigger,
279 .pointer = pcm_playback_pointer,
280 .ack = pcm_playback_ack,
281 .page = snd_pcm_lib_get_vmalloc_page,
286 err = snd_pcm_new(tscm->card, tscm->card->driver, 0, 1, 1, &pcm);
290 pcm->private_data = tscm;
291 snprintf(pcm->name, sizeof(pcm->name),
292 "%s PCM", tscm->card->shortname);
293 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &playback_ops);
294 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &capture_ops);