1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * oxfw_pcm.c - a part of driver for OXFW970/971 based devices
4 *
5 * Copyright (c) Clemens Ladisch <clemens@ladisch.de>
6 */
7
8 #include "oxfw.h"
9
10 static int hw_rule_rate(struct snd_pcm_hw_params *params,
11 struct snd_pcm_hw_rule *rule)
12 {
13 u8 **formats = rule->private;
14 struct snd_interval *r =
15 hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE);
16 const struct snd_interval *c =
17 hw_param_interval_c(params, SNDRV_PCM_HW_PARAM_CHANNELS);
18 struct snd_interval t = {
19 .min = UINT_MAX, .max = 0, .integer = 1
20 };
21 struct snd_oxfw_stream_formation formation;
22 int i, err;
23
24 for (i = 0; i < SND_OXFW_STREAM_FORMAT_ENTRIES; i++) {
25 if (formats[i] == NULL)
26 continue;
27
28 err = snd_oxfw_stream_parse_format(formats[i], &formation);
29 if (err < 0)
30 continue;
31 if (!snd_interval_test(c, formation.pcm))
32 continue;
33
34 t.min = min(t.min, formation.rate);
35 t.max = max(t.max, formation.rate);
36
37 }
38 return snd_interval_refine(r, &t);
39 }
40
41 static int hw_rule_channels(struct snd_pcm_hw_params *params,
42 struct snd_pcm_hw_rule *rule)
43 {
44 u8 **formats = rule->private;
45 struct snd_interval *c =
46 hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS);
47 const struct snd_interval *r =
48 hw_param_interval_c(params, SNDRV_PCM_HW_PARAM_RATE);
49 struct snd_oxfw_stream_formation formation;
50 int i, j, err;
51 unsigned int count, list[SND_OXFW_STREAM_FORMAT_ENTRIES] = {0};
52
53 count = 0;
54 for (i = 0; i < SND_OXFW_STREAM_FORMAT_ENTRIES; i++) {
55 if (formats[i] == NULL)
56 break;
57
58 err = snd_oxfw_stream_parse_format(formats[i], &formation);
59 if (err < 0)
60 continue;
61 if (!snd_interval_test(r, formation.rate))
62 continue;
63 if (list[count] == formation.pcm)
64 continue;
65
66 for (j = 0; j < ARRAY_SIZE(list); j++) {
67 if (list[j] == formation.pcm)
68 break;
69 }
70 if (j == ARRAY_SIZE(list)) {
71 list[count] = formation.pcm;
72 if (++count == ARRAY_SIZE(list))
73 break;
74 }
75 }
76
77 return snd_interval_list(c, count, list, 0);
78 }
79
80 static void limit_channels_and_rates(struct snd_pcm_hardware *hw, u8 **formats)
81 {
82 struct snd_oxfw_stream_formation formation;
83 int i, err;
84
85 hw->channels_min = UINT_MAX;
86 hw->channels_max = 0;
87
88 hw->rate_min = UINT_MAX;
89 hw->rate_max = 0;
90 hw->rates = 0;
91
92 for (i = 0; i < SND_OXFW_STREAM_FORMAT_ENTRIES; i++) {
93 if (formats[i] == NULL)
94 break;
95
96 err = snd_oxfw_stream_parse_format(formats[i], &formation);
97 if (err < 0)
98 continue;
99
100 hw->channels_min = min(hw->channels_min, formation.pcm);
101 hw->channels_max = max(hw->channels_max, formation.pcm);
102
103 hw->rate_min = min(hw->rate_min, formation.rate);
104 hw->rate_max = max(hw->rate_max, formation.rate);
105 hw->rates |= snd_pcm_rate_to_rate_bit(formation.rate);
106 }
107 }
108
109 static int init_hw_params(struct snd_oxfw *oxfw,
110 struct snd_pcm_substream *substream)
111 {
112 struct snd_pcm_runtime *runtime = substream->runtime;
113 u8 **formats;
114 struct amdtp_stream *stream;
115 int err;
116
117 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) {
118 runtime->hw.formats = AM824_IN_PCM_FORMAT_BITS;
119 stream = &oxfw->tx_stream;
120 formats = oxfw->tx_stream_formats;
121 } else {
122 runtime->hw.formats = AM824_OUT_PCM_FORMAT_BITS;
123 stream = &oxfw->rx_stream;
124 formats = oxfw->rx_stream_formats;
125 }
126
127 limit_channels_and_rates(&runtime->hw, formats);
128
129 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS,
130 hw_rule_channels, formats,
131 SNDRV_PCM_HW_PARAM_RATE, -1);
132 if (err < 0)
133 goto end;
134
135 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
136 hw_rule_rate, formats,
137 SNDRV_PCM_HW_PARAM_CHANNELS, -1);
138 if (err < 0)
139 goto end;
140
141 err = amdtp_am824_add_pcm_hw_constraints(stream, runtime);
142 end:
143 return err;
144 }
145
146 static int limit_to_current_params(struct snd_pcm_substream *substream)
147 {
148 struct snd_oxfw *oxfw = substream->private_data;
149 struct snd_oxfw_stream_formation formation;
150 enum avc_general_plug_dir dir;
151 int err;
152
153 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
154 dir = AVC_GENERAL_PLUG_DIR_OUT;
155 else
156 dir = AVC_GENERAL_PLUG_DIR_IN;
157
158 err = snd_oxfw_stream_get_current_formation(oxfw, dir, &formation);
159 if (err < 0)
160 goto end;
161
162 substream->runtime->hw.channels_min = formation.pcm;
163 substream->runtime->hw.channels_max = formation.pcm;
164 substream->runtime->hw.rate_min = formation.rate;
165 substream->runtime->hw.rate_max = formation.rate;
166 end:
167 return err;
168 }
169
170 static int pcm_open(struct snd_pcm_substream *substream)
171 {
172 struct snd_oxfw *oxfw = substream->private_data;
173 struct amdtp_domain *d = &oxfw->domain;
174 int err;
175
176 err = snd_oxfw_stream_lock_try(oxfw);
177 if (err < 0)
178 return err;
179
180 err = init_hw_params(oxfw, substream);
181 if (err < 0)
182 goto err_locked;
183
184 mutex_lock(&oxfw->mutex);
185
186 // When source of clock is not internal or any stream is reserved for
187 // transmission of PCM frames, the available sampling rate is limited
188 // at current one.
189 if (oxfw->substreams_count > 0 && d->events_per_period > 0) {
190 unsigned int frames_per_period = d->events_per_period;
191 unsigned int frames_per_buffer = d->events_per_buffer;
192
193 err = limit_to_current_params(substream);
194 if (err < 0) {
195 mutex_unlock(&oxfw->mutex);
196 goto err_locked;
197 }
198
199 if (frames_per_period > 0) {
200 err = snd_pcm_hw_constraint_minmax(substream->runtime,
201 SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
202 frames_per_period, frames_per_period);
203 if (err < 0) {
204 mutex_unlock(&oxfw->mutex);
205 goto err_locked;
206 }
207
208 err = snd_pcm_hw_constraint_minmax(substream->runtime,
209 SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
210 frames_per_buffer, frames_per_buffer);
211 if (err < 0) {
212 mutex_unlock(&oxfw->mutex);
213 goto err_locked;
214 }
215 }
216 }
217
218 mutex_unlock(&oxfw->mutex);
219
220 snd_pcm_set_sync(substream);
221
222 return 0;
223 err_locked:
224 snd_oxfw_stream_lock_release(oxfw);
225 return err;
226 }
227
228 static int pcm_close(struct snd_pcm_substream *substream)
229 {
230 struct snd_oxfw *oxfw = substream->private_data;
231
232 snd_oxfw_stream_lock_release(oxfw);
233 return 0;
234 }
235
236 static int pcm_capture_hw_params(struct snd_pcm_substream *substream,
237 struct snd_pcm_hw_params *hw_params)
238 {
239 struct snd_oxfw *oxfw = substream->private_data;
240 int err = 0;
241
242 if (substream->runtime->state == SNDRV_PCM_STATE_OPEN) {
243 unsigned int rate = params_rate(hw_params);
244 unsigned int channels = params_channels(hw_params);
245 unsigned int frames_per_period = params_period_size(hw_params);
246 unsigned int frames_per_buffer = params_buffer_size(hw_params);
247
248 mutex_lock(&oxfw->mutex);
249 err = snd_oxfw_stream_reserve_duplex(oxfw, &oxfw->tx_stream,
250 rate, channels, frames_per_period,
251 frames_per_buffer);
252 if (err >= 0)
253 ++oxfw->substreams_count;
254 mutex_unlock(&oxfw->mutex);
255 }
256
257 return err;
258 }
259 static int pcm_playback_hw_params(struct snd_pcm_substream *substream,
260 struct snd_pcm_hw_params *hw_params)
261 {
262 struct snd_oxfw *oxfw = substream->private_data;
263 int err = 0;
264
265 if (substream->runtime->state == SNDRV_PCM_STATE_OPEN) {
266 unsigned int rate = params_rate(hw_params);
267 unsigned int channels = params_channels(hw_params);
268 unsigned int frames_per_period = params_period_size(hw_params);
269 unsigned int frames_per_buffer = params_buffer_size(hw_params);
270
271 mutex_lock(&oxfw->mutex);
272 err = snd_oxfw_stream_reserve_duplex(oxfw, &oxfw->rx_stream,
273 rate, channels, frames_per_period,
274 frames_per_buffer);
275 if (err >= 0)
276 ++oxfw->substreams_count;
277 mutex_unlock(&oxfw->mutex);
278 }
279
280 return err;
281 }
282
283 static int pcm_capture_hw_free(struct snd_pcm_substream *substream)
284 {
285 struct snd_oxfw *oxfw = substream->private_data;
286
287 mutex_lock(&oxfw->mutex);
288
289 if (substream->runtime->state != SNDRV_PCM_STATE_OPEN)
290 --oxfw->substreams_count;
291
292 snd_oxfw_stream_stop_duplex(oxfw);
293
294 mutex_unlock(&oxfw->mutex);
295
296 return 0;
297 }
298 static int pcm_playback_hw_free(struct snd_pcm_substream *substream)
299 {
300 struct snd_oxfw *oxfw = substream->private_data;
301
302 mutex_lock(&oxfw->mutex);
303
304 if (substream->runtime->state != SNDRV_PCM_STATE_OPEN)
305 --oxfw->substreams_count;
306
307 snd_oxfw_stream_stop_duplex(oxfw);
308
309 mutex_unlock(&oxfw->mutex);
310
311 return 0;
312 }
313
314 static int pcm_capture_prepare(struct snd_pcm_substream *substream)
315 {
316 struct snd_oxfw *oxfw = substream->private_data;
317 int err;
318
319 mutex_lock(&oxfw->mutex);
320 err = snd_oxfw_stream_start_duplex(oxfw);
321 mutex_unlock(&oxfw->mutex);
322 if (err < 0)
323 goto end;
324
325 amdtp_stream_pcm_prepare(&oxfw->tx_stream);
326 end:
327 return err;
328 }
329 static int pcm_playback_prepare(struct snd_pcm_substream *substream)
330 {
331 struct snd_oxfw *oxfw = substream->private_data;
332 int err;
333
334 mutex_lock(&oxfw->mutex);
335 err = snd_oxfw_stream_start_duplex(oxfw);
336 mutex_unlock(&oxfw->mutex);
337 if (err < 0)
338 goto end;
339
340 amdtp_stream_pcm_prepare(&oxfw->rx_stream);
341 end:
342 return err;
343 }
344
345 static int pcm_capture_trigger(struct snd_pcm_substream *substream, int cmd)
346 {
347 struct snd_oxfw *oxfw = substream->private_data;
348 struct snd_pcm_substream *pcm;
349
350 switch (cmd) {
351 case SNDRV_PCM_TRIGGER_START:
352 pcm = substream;
353 break;
354 case SNDRV_PCM_TRIGGER_STOP:
355 pcm = NULL;
356 break;
357 default:
358 return -EINVAL;
359 }
360 amdtp_stream_pcm_trigger(&oxfw->tx_stream, pcm);
361 return 0;
362 }
363 static int pcm_playback_trigger(struct snd_pcm_substream *substream, int cmd)
364 {
365 struct snd_oxfw *oxfw = substream->private_data;
366 struct snd_pcm_substream *pcm;
367
368 switch (cmd) {
369 case SNDRV_PCM_TRIGGER_START:
370 pcm = substream;
371 break;
372 case SNDRV_PCM_TRIGGER_STOP:
373 pcm = NULL;
374 break;
375 default:
376 return -EINVAL;
377 }
378 amdtp_stream_pcm_trigger(&oxfw->rx_stream, pcm);
379 return 0;
380 }
381
382 static snd_pcm_uframes_t pcm_capture_pointer(struct snd_pcm_substream *sbstm)
383 {
384 struct snd_oxfw *oxfw = sbstm->private_data;
385
386 return amdtp_domain_stream_pcm_pointer(&oxfw->domain, &oxfw->tx_stream);
387 }
388 static snd_pcm_uframes_t pcm_playback_pointer(struct snd_pcm_substream *sbstm)
389 {
390 struct snd_oxfw *oxfw = sbstm->private_data;
391
392 return amdtp_domain_stream_pcm_pointer(&oxfw->domain, &oxfw->rx_stream);
393 }
394
395 static int pcm_capture_ack(struct snd_pcm_substream *substream)
396 {
397 struct snd_oxfw *oxfw = substream->private_data;
398
399 return amdtp_domain_stream_pcm_ack(&oxfw->domain, &oxfw->tx_stream);
400 }
401
402 static int pcm_playback_ack(struct snd_pcm_substream *substream)
403 {
404 struct snd_oxfw *oxfw = substream->private_data;
405
406 return amdtp_domain_stream_pcm_ack(&oxfw->domain, &oxfw->rx_stream);
407 }
408
409 int snd_oxfw_create_pcm(struct snd_oxfw *oxfw)
410 {
411 static const struct snd_pcm_ops capture_ops = {
412 .open = pcm_open,
413 .close = pcm_close,
414 .hw_params = pcm_capture_hw_params,
415 .hw_free = pcm_capture_hw_free,
416 .prepare = pcm_capture_prepare,
417 .trigger = pcm_capture_trigger,
418 .pointer = pcm_capture_pointer,
419 .ack = pcm_capture_ack,
420 };
421 static const struct snd_pcm_ops playback_ops = {
422 .open = pcm_open,
423 .close = pcm_close,
424 .hw_params = pcm_playback_hw_params,
425 .hw_free = pcm_playback_hw_free,
426 .prepare = pcm_playback_prepare,
427 .trigger = pcm_playback_trigger,
428 .pointer = pcm_playback_pointer,
429 .ack = pcm_playback_ack,
430 };
431 struct snd_pcm *pcm;
432 unsigned int cap = 0;
433 int err;
434
435 if (oxfw->has_output)
436 cap = 1;
437
438 err = snd_pcm_new(oxfw->card, oxfw->card->driver, 0, 1, cap, &pcm);
439 if (err < 0)
440 return err;
441
442 pcm->private_data = oxfw;
443 strcpy(pcm->name, oxfw->card->shortname);
444 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &playback_ops);
445 if (cap > 0)
446 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &capture_ops);
447 snd_pcm_set_managed_buffer_all(pcm, SNDRV_DMA_TYPE_VMALLOC, NULL, 0, 0);
448
449 return 0;
450 }
451
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