1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * digi00x-pcm.c - a part of driver for Digidesign Digi 002/003 family
4 *
5 * Copyright (c) 2014-2015 Takashi Sakamoto
6 */
7
8 #include "digi00x.h"
9
10 static int hw_rule_rate(struct snd_pcm_hw_params *params,
11 struct snd_pcm_hw_rule *rule)
12 {
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,
19 };
20 unsigned int i;
21
22 for (i = 0; i < SND_DG00X_RATE_COUNT; i++) {
23 if (!snd_interval_test(c,
24 snd_dg00x_stream_pcm_channels[i]))
25 continue;
26
27 t.min = min(t.min, snd_dg00x_stream_rates[i]);
28 t.max = max(t.max, snd_dg00x_stream_rates[i]);
29 }
30
31 return snd_interval_refine(r, &t);
32 }
33
34 static int hw_rule_channels(struct snd_pcm_hw_params *params,
35 struct snd_pcm_hw_rule *rule)
36 {
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,
43 };
44 unsigned int i;
45
46 for (i = 0; i < SND_DG00X_RATE_COUNT; i++) {
47 if (!snd_interval_test(r, snd_dg00x_stream_rates[i]))
48 continue;
49
50 t.min = min(t.min, snd_dg00x_stream_pcm_channels[i]);
51 t.max = max(t.max, snd_dg00x_stream_pcm_channels[i]);
52 }
53
54 return snd_interval_refine(c, &t);
55 }
56
57 static int pcm_init_hw_params(struct snd_dg00x *dg00x,
58 struct snd_pcm_substream *substream)
59 {
60 struct snd_pcm_runtime *runtime = substream->runtime;
61 struct snd_pcm_hardware *hw = &runtime->hw;
62 struct amdtp_stream *s;
63 int err;
64
65
66 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) {
67 substream->runtime->hw.formats = SNDRV_PCM_FMTBIT_S32;
68 s = &dg00x->tx_stream;
69 } else {
70 substream->runtime->hw.formats = SNDRV_PCM_FMTBIT_S32;
71 s = &dg00x->rx_stream;
72 }
73
74 hw->channels_min = 10;
75 hw->channels_max = 18;
76
77 hw->rates = SNDRV_PCM_RATE_44100 |
78 SNDRV_PCM_RATE_48000 |
79 SNDRV_PCM_RATE_88200 |
80 SNDRV_PCM_RATE_96000;
81 snd_pcm_limit_hw_rates(runtime);
82
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);
87 if (err < 0)
88 return err;
89
90 err = snd_pcm_hw_rule_add(substream->runtime, 0,
91 SNDRV_PCM_HW_PARAM_RATE,
92 hw_rule_rate, NULL,
93 SNDRV_PCM_HW_PARAM_CHANNELS, -1);
94 if (err < 0)
95 return err;
96
97 return amdtp_dot_add_pcm_hw_constraints(s, substream->runtime);
98 }
99
100 static int pcm_open(struct snd_pcm_substream *substream)
101 {
102 struct snd_dg00x *dg00x = substream->private_data;
103 struct amdtp_domain *d = &dg00x->domain;
104 enum snd_dg00x_clock clock;
105 bool detect;
106 int err;
107
108 err = snd_dg00x_stream_lock_try(dg00x);
109 if (err < 0)
110 return err;
111
112 err = pcm_init_hw_params(dg00x, substream);
113 if (err < 0)
114 goto err_locked;
115
116 /* Check current clock source. */
117 err = snd_dg00x_stream_get_clock(dg00x, &clock);
118 if (err < 0)
119 goto err_locked;
120 if (clock != SND_DG00X_CLOCK_INTERNAL) {
121 err = snd_dg00x_stream_check_external_clock(dg00x, &detect);
122 if (err < 0)
123 goto err_locked;
124 if (!detect) {
125 err = -EBUSY;
126 goto err_locked;
127 }
128 }
129
130 mutex_lock(&dg00x->mutex);
131
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
134 // at current one.
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;
139 unsigned int rate;
140
141 err = snd_dg00x_stream_get_external_rate(dg00x, &rate);
142 if (err < 0) {
143 mutex_unlock(&dg00x->mutex);
144 goto err_locked;
145 }
146 substream->runtime->hw.rate_min = rate;
147 substream->runtime->hw.rate_max = rate;
148
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);
153 if (err < 0) {
154 mutex_unlock(&dg00x->mutex);
155 goto err_locked;
156 }
157
158 err = snd_pcm_hw_constraint_minmax(substream->runtime,
159 SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
160 frames_per_buffer, frames_per_buffer);
161 if (err < 0) {
162 mutex_unlock(&dg00x->mutex);
163 goto err_locked;
164 }
165 }
166 }
167
168 mutex_unlock(&dg00x->mutex);
169
170 snd_pcm_set_sync(substream);
171
172 return 0;
173 err_locked:
174 snd_dg00x_stream_lock_release(dg00x);
175 return err;
176 }
177
178 static int pcm_close(struct snd_pcm_substream *substream)
179 {
180 struct snd_dg00x *dg00x = substream->private_data;
181
182 snd_dg00x_stream_lock_release(dg00x);
183
184 return 0;
185 }
186
187 static int pcm_hw_params(struct snd_pcm_substream *substream,
188 struct snd_pcm_hw_params *hw_params)
189 {
190 struct snd_dg00x *dg00x = substream->private_data;
191 int err = 0;
192
193 if (substream->runtime->state == SNDRV_PCM_STATE_OPEN) {
194 unsigned int rate = params_rate(hw_params);
195 unsigned int frames_per_period = params_period_size(hw_params);
196 unsigned int frames_per_buffer = params_buffer_size(hw_params);
197
198 mutex_lock(&dg00x->mutex);
199 err = snd_dg00x_stream_reserve_duplex(dg00x, rate,
200 frames_per_period, frames_per_buffer);
201 if (err >= 0)
202 ++dg00x->substreams_counter;
203 mutex_unlock(&dg00x->mutex);
204 }
205
206 return err;
207 }
208
209 static int pcm_hw_free(struct snd_pcm_substream *substream)
210 {
211 struct snd_dg00x *dg00x = substream->private_data;
212
213 mutex_lock(&dg00x->mutex);
214
215 if (substream->runtime->state != SNDRV_PCM_STATE_OPEN)
216 --dg00x->substreams_counter;
217
218 snd_dg00x_stream_stop_duplex(dg00x);
219
220 mutex_unlock(&dg00x->mutex);
221
222 return 0;
223 }
224
225 static int pcm_capture_prepare(struct snd_pcm_substream *substream)
226 {
227 struct snd_dg00x *dg00x = substream->private_data;
228 int err;
229
230 mutex_lock(&dg00x->mutex);
231
232 err = snd_dg00x_stream_start_duplex(dg00x);
233 if (err >= 0)
234 amdtp_stream_pcm_prepare(&dg00x->tx_stream);
235
236 mutex_unlock(&dg00x->mutex);
237
238 return err;
239 }
240
241 static int pcm_playback_prepare(struct snd_pcm_substream *substream)
242 {
243 struct snd_dg00x *dg00x = substream->private_data;
244 int err;
245
246 mutex_lock(&dg00x->mutex);
247
248 err = snd_dg00x_stream_start_duplex(dg00x);
249 if (err >= 0) {
250 amdtp_stream_pcm_prepare(&dg00x->rx_stream);
251 amdtp_dot_reset(&dg00x->rx_stream);
252 }
253
254 mutex_unlock(&dg00x->mutex);
255
256 return err;
257 }
258
259 static int pcm_capture_trigger(struct snd_pcm_substream *substream, int cmd)
260 {
261 struct snd_dg00x *dg00x = substream->private_data;
262
263 switch (cmd) {
264 case SNDRV_PCM_TRIGGER_START:
265 amdtp_stream_pcm_trigger(&dg00x->tx_stream, substream);
266 break;
267 case SNDRV_PCM_TRIGGER_STOP:
268 amdtp_stream_pcm_trigger(&dg00x->tx_stream, NULL);
269 break;
270 default:
271 return -EINVAL;
272 }
273
274 return 0;
275 }
276
277 static int pcm_playback_trigger(struct snd_pcm_substream *substream, int cmd)
278 {
279 struct snd_dg00x *dg00x = substream->private_data;
280
281 switch (cmd) {
282 case SNDRV_PCM_TRIGGER_START:
283 amdtp_stream_pcm_trigger(&dg00x->rx_stream, substream);
284 break;
285 case SNDRV_PCM_TRIGGER_STOP:
286 amdtp_stream_pcm_trigger(&dg00x->rx_stream, NULL);
287 break;
288 default:
289 return -EINVAL;
290 }
291
292 return 0;
293 }
294
295 static snd_pcm_uframes_t pcm_capture_pointer(struct snd_pcm_substream *sbstrm)
296 {
297 struct snd_dg00x *dg00x = sbstrm->private_data;
298
299 return amdtp_domain_stream_pcm_pointer(&dg00x->domain, &dg00x->tx_stream);
300 }
301
302 static snd_pcm_uframes_t pcm_playback_pointer(struct snd_pcm_substream *sbstrm)
303 {
304 struct snd_dg00x *dg00x = sbstrm->private_data;
305
306 return amdtp_domain_stream_pcm_pointer(&dg00x->domain, &dg00x->rx_stream);
307 }
308
309 static int pcm_capture_ack(struct snd_pcm_substream *substream)
310 {
311 struct snd_dg00x *dg00x = substream->private_data;
312
313 return amdtp_domain_stream_pcm_ack(&dg00x->domain, &dg00x->tx_stream);
314 }
315
316 static int pcm_playback_ack(struct snd_pcm_substream *substream)
317 {
318 struct snd_dg00x *dg00x = substream->private_data;
319
320 return amdtp_domain_stream_pcm_ack(&dg00x->domain, &dg00x->rx_stream);
321 }
322
323 int snd_dg00x_create_pcm_devices(struct snd_dg00x *dg00x)
324 {
325 static const struct snd_pcm_ops capture_ops = {
326 .open = pcm_open,
327 .close = pcm_close,
328 .hw_params = pcm_hw_params,
329 .hw_free = pcm_hw_free,
330 .prepare = pcm_capture_prepare,
331 .trigger = pcm_capture_trigger,
332 .pointer = pcm_capture_pointer,
333 .ack = pcm_capture_ack,
334 };
335 static const struct snd_pcm_ops playback_ops = {
336 .open = pcm_open,
337 .close = pcm_close,
338 .hw_params = pcm_hw_params,
339 .hw_free = pcm_hw_free,
340 .prepare = pcm_playback_prepare,
341 .trigger = pcm_playback_trigger,
342 .pointer = pcm_playback_pointer,
343 .ack = pcm_playback_ack,
344 };
345 struct snd_pcm *pcm;
346 int err;
347
348 err = snd_pcm_new(dg00x->card, dg00x->card->driver, 0, 1, 1, &pcm);
349 if (err < 0)
350 return err;
351
352 pcm->private_data = dg00x;
353 snprintf(pcm->name, sizeof(pcm->name),
354 "%s PCM", dg00x->card->shortname);
355 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &playback_ops);
356 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &capture_ops);
357 snd_pcm_set_managed_buffer_all(pcm, SNDRV_DMA_TYPE_VMALLOC, NULL, 0, 0);
358
359 return 0;
360 }
361
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