1 // SPDX-License-Identifier: GPL-2.0-only
3 * digi00x-pcm.c - a part of driver for Digidesign Digi 002/003 family
5 * Copyright (c) 2014-2015 Takashi Sakamoto
10 static int hw_rule_rate(struct snd_pcm_hw_params *params,
11 struct snd_pcm_hw_rule *rule)
13 struct snd_interval *r =
14 hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE);
15 const struct snd_interval *c =
16 hw_param_interval_c(params, SNDRV_PCM_HW_PARAM_CHANNELS);
17 struct snd_interval t = {
18 .min = UINT_MAX, .max = 0, .integer = 1,
22 for (i = 0; i < SND_DG00X_RATE_COUNT; i++) {
23 if (!snd_interval_test(c,
24 snd_dg00x_stream_pcm_channels[i]))
27 t.min = min(t.min, snd_dg00x_stream_rates[i]);
28 t.max = max(t.max, snd_dg00x_stream_rates[i]);
31 return snd_interval_refine(r, &t);
34 static int hw_rule_channels(struct snd_pcm_hw_params *params,
35 struct snd_pcm_hw_rule *rule)
37 struct snd_interval *c =
38 hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS);
39 const struct snd_interval *r =
40 hw_param_interval_c(params, SNDRV_PCM_HW_PARAM_RATE);
41 struct snd_interval t = {
42 .min = UINT_MAX, .max = 0, .integer = 1,
46 for (i = 0; i < SND_DG00X_RATE_COUNT; i++) {
47 if (!snd_interval_test(r, snd_dg00x_stream_rates[i]))
50 t.min = min(t.min, snd_dg00x_stream_pcm_channels[i]);
51 t.max = max(t.max, snd_dg00x_stream_pcm_channels[i]);
54 return snd_interval_refine(c, &t);
57 static int pcm_init_hw_params(struct snd_dg00x *dg00x,
58 struct snd_pcm_substream *substream)
60 struct snd_pcm_runtime *runtime = substream->runtime;
61 struct snd_pcm_hardware *hw = &runtime->hw;
62 struct amdtp_stream *s;
66 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) {
67 substream->runtime->hw.formats = SNDRV_PCM_FMTBIT_S32;
68 s = &dg00x->tx_stream;
70 substream->runtime->hw.formats = SNDRV_PCM_FMTBIT_S32;
71 s = &dg00x->rx_stream;
74 hw->channels_min = 10;
75 hw->channels_max = 18;
77 hw->rates = SNDRV_PCM_RATE_44100 |
78 SNDRV_PCM_RATE_48000 |
79 SNDRV_PCM_RATE_88200 |
81 snd_pcm_limit_hw_rates(runtime);
83 err = snd_pcm_hw_rule_add(substream->runtime, 0,
84 SNDRV_PCM_HW_PARAM_CHANNELS,
85 hw_rule_channels, NULL,
86 SNDRV_PCM_HW_PARAM_RATE, -1);
90 err = snd_pcm_hw_rule_add(substream->runtime, 0,
91 SNDRV_PCM_HW_PARAM_RATE,
93 SNDRV_PCM_HW_PARAM_CHANNELS, -1);
97 return amdtp_dot_add_pcm_hw_constraints(s, substream->runtime);
100 static int pcm_open(struct snd_pcm_substream *substream)
102 struct snd_dg00x *dg00x = substream->private_data;
103 struct amdtp_domain *d = &dg00x->domain;
104 enum snd_dg00x_clock clock;
108 err = snd_dg00x_stream_lock_try(dg00x);
112 err = pcm_init_hw_params(dg00x, substream);
116 /* Check current clock source. */
117 err = snd_dg00x_stream_get_clock(dg00x, &clock);
120 if (clock != SND_DG00X_CLOCK_INTERNAL) {
121 err = snd_dg00x_stream_check_external_clock(dg00x, &detect);
130 mutex_lock(&dg00x->mutex);
132 // When source of clock is not internal or any stream is reserved for
133 // transmission of PCM frames, the available sampling rate is limited
135 if ((clock != SND_DG00X_CLOCK_INTERNAL) ||
136 (dg00x->substreams_counter > 0 && d->events_per_period > 0)) {
137 unsigned int frames_per_period = d->events_per_period;
138 unsigned int frames_per_buffer = d->events_per_buffer;
141 err = snd_dg00x_stream_get_external_rate(dg00x, &rate);
143 mutex_unlock(&dg00x->mutex);
146 substream->runtime->hw.rate_min = rate;
147 substream->runtime->hw.rate_max = rate;
149 if (frames_per_period > 0) {
150 err = snd_pcm_hw_constraint_minmax(substream->runtime,
151 SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
152 frames_per_period, frames_per_period);
154 mutex_unlock(&dg00x->mutex);
158 err = snd_pcm_hw_constraint_minmax(substream->runtime,
159 SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
160 frames_per_buffer, frames_per_buffer);
162 mutex_unlock(&dg00x->mutex);
168 mutex_unlock(&dg00x->mutex);
170 snd_pcm_set_sync(substream);
174 snd_dg00x_stream_lock_release(dg00x);
178 static int pcm_close(struct snd_pcm_substream *substream)
180 struct snd_dg00x *dg00x = substream->private_data;
182 snd_dg00x_stream_lock_release(dg00x);
187 static int pcm_hw_params(struct snd_pcm_substream *substream,
188 struct snd_pcm_hw_params *hw_params)
190 struct snd_dg00x *dg00x = substream->private_data;
193 err = snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(hw_params));
197 if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN) {
198 unsigned int rate = params_rate(hw_params);
199 unsigned int frames_per_period = params_period_size(hw_params);
200 unsigned int frames_per_buffer = params_buffer_size(hw_params);
202 mutex_lock(&dg00x->mutex);
203 err = snd_dg00x_stream_reserve_duplex(dg00x, rate,
204 frames_per_period, frames_per_buffer);
206 ++dg00x->substreams_counter;
207 mutex_unlock(&dg00x->mutex);
213 static int pcm_hw_free(struct snd_pcm_substream *substream)
215 struct snd_dg00x *dg00x = substream->private_data;
217 mutex_lock(&dg00x->mutex);
219 if (substream->runtime->status->state != SNDRV_PCM_STATE_OPEN)
220 --dg00x->substreams_counter;
222 snd_dg00x_stream_stop_duplex(dg00x);
224 mutex_unlock(&dg00x->mutex);
226 return snd_pcm_lib_free_pages(substream);
229 static int pcm_capture_prepare(struct snd_pcm_substream *substream)
231 struct snd_dg00x *dg00x = substream->private_data;
234 mutex_lock(&dg00x->mutex);
236 err = snd_dg00x_stream_start_duplex(dg00x);
238 amdtp_stream_pcm_prepare(&dg00x->tx_stream);
240 mutex_unlock(&dg00x->mutex);
245 static int pcm_playback_prepare(struct snd_pcm_substream *substream)
247 struct snd_dg00x *dg00x = substream->private_data;
250 mutex_lock(&dg00x->mutex);
252 err = snd_dg00x_stream_start_duplex(dg00x);
254 amdtp_stream_pcm_prepare(&dg00x->rx_stream);
255 amdtp_dot_reset(&dg00x->rx_stream);
258 mutex_unlock(&dg00x->mutex);
263 static int pcm_capture_trigger(struct snd_pcm_substream *substream, int cmd)
265 struct snd_dg00x *dg00x = substream->private_data;
268 case SNDRV_PCM_TRIGGER_START:
269 amdtp_stream_pcm_trigger(&dg00x->tx_stream, substream);
271 case SNDRV_PCM_TRIGGER_STOP:
272 amdtp_stream_pcm_trigger(&dg00x->tx_stream, NULL);
281 static int pcm_playback_trigger(struct snd_pcm_substream *substream, int cmd)
283 struct snd_dg00x *dg00x = substream->private_data;
286 case SNDRV_PCM_TRIGGER_START:
287 amdtp_stream_pcm_trigger(&dg00x->rx_stream, substream);
289 case SNDRV_PCM_TRIGGER_STOP:
290 amdtp_stream_pcm_trigger(&dg00x->rx_stream, NULL);
299 static snd_pcm_uframes_t pcm_capture_pointer(struct snd_pcm_substream *sbstrm)
301 struct snd_dg00x *dg00x = sbstrm->private_data;
303 return amdtp_domain_stream_pcm_pointer(&dg00x->domain, &dg00x->tx_stream);
306 static snd_pcm_uframes_t pcm_playback_pointer(struct snd_pcm_substream *sbstrm)
308 struct snd_dg00x *dg00x = sbstrm->private_data;
310 return amdtp_domain_stream_pcm_pointer(&dg00x->domain, &dg00x->rx_stream);
313 static int pcm_capture_ack(struct snd_pcm_substream *substream)
315 struct snd_dg00x *dg00x = substream->private_data;
317 return amdtp_domain_stream_pcm_ack(&dg00x->domain, &dg00x->tx_stream);
320 static int pcm_playback_ack(struct snd_pcm_substream *substream)
322 struct snd_dg00x *dg00x = substream->private_data;
324 return amdtp_domain_stream_pcm_ack(&dg00x->domain, &dg00x->rx_stream);
327 int snd_dg00x_create_pcm_devices(struct snd_dg00x *dg00x)
329 static const struct snd_pcm_ops capture_ops = {
332 .ioctl = snd_pcm_lib_ioctl,
333 .hw_params = pcm_hw_params,
334 .hw_free = pcm_hw_free,
335 .prepare = pcm_capture_prepare,
336 .trigger = pcm_capture_trigger,
337 .pointer = pcm_capture_pointer,
338 .ack = pcm_capture_ack,
340 static const struct snd_pcm_ops playback_ops = {
343 .ioctl = snd_pcm_lib_ioctl,
344 .hw_params = pcm_hw_params,
345 .hw_free = pcm_hw_free,
346 .prepare = pcm_playback_prepare,
347 .trigger = pcm_playback_trigger,
348 .pointer = pcm_playback_pointer,
349 .ack = pcm_playback_ack,
354 err = snd_pcm_new(dg00x->card, dg00x->card->driver, 0, 1, 1, &pcm);
358 pcm->private_data = dg00x;
359 snprintf(pcm->name, sizeof(pcm->name),
360 "%s PCM", dg00x->card->shortname);
361 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &playback_ops);
362 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &capture_ops);
363 snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_VMALLOC,