Merge tag '5.7-rc-smb3-fixes-part1' of git://git.samba.org/sfrench/cifs-2.6
[sfrench/cifs-2.6.git] / sound / firewire / oxfw / oxfw-pcm.c
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;
241
242         err = snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(hw_params));
243         if (err < 0)
244                 return err;
245
246         if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN) {
247                 unsigned int rate = params_rate(hw_params);
248                 unsigned int channels = params_channels(hw_params);
249                 unsigned int frames_per_period = params_period_size(hw_params);
250                 unsigned int frames_per_buffer = params_buffer_size(hw_params);
251
252                 mutex_lock(&oxfw->mutex);
253                 err = snd_oxfw_stream_reserve_duplex(oxfw, &oxfw->tx_stream,
254                                         rate, channels, frames_per_period,
255                                         frames_per_buffer);
256                 if (err >= 0)
257                         ++oxfw->substreams_count;
258                 mutex_unlock(&oxfw->mutex);
259         }
260
261         return err;
262 }
263 static int pcm_playback_hw_params(struct snd_pcm_substream *substream,
264                                   struct snd_pcm_hw_params *hw_params)
265 {
266         struct snd_oxfw *oxfw = substream->private_data;
267         int err;
268
269         err = snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(hw_params));
270         if (err < 0)
271                 return err;
272
273         if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN) {
274                 unsigned int rate = params_rate(hw_params);
275                 unsigned int channels = params_channels(hw_params);
276                 unsigned int frames_per_period = params_period_size(hw_params);
277                 unsigned int frames_per_buffer = params_buffer_size(hw_params);
278
279                 mutex_lock(&oxfw->mutex);
280                 err = snd_oxfw_stream_reserve_duplex(oxfw, &oxfw->rx_stream,
281                                         rate, channels, frames_per_period,
282                                         frames_per_buffer);
283                 if (err >= 0)
284                         ++oxfw->substreams_count;
285                 mutex_unlock(&oxfw->mutex);
286         }
287
288         return err;
289 }
290
291 static int pcm_capture_hw_free(struct snd_pcm_substream *substream)
292 {
293         struct snd_oxfw *oxfw = substream->private_data;
294
295         mutex_lock(&oxfw->mutex);
296
297         if (substream->runtime->status->state != SNDRV_PCM_STATE_OPEN)
298                 --oxfw->substreams_count;
299
300         snd_oxfw_stream_stop_duplex(oxfw);
301
302         mutex_unlock(&oxfw->mutex);
303
304         return snd_pcm_lib_free_pages(substream);
305 }
306 static int pcm_playback_hw_free(struct snd_pcm_substream *substream)
307 {
308         struct snd_oxfw *oxfw = substream->private_data;
309
310         mutex_lock(&oxfw->mutex);
311
312         if (substream->runtime->status->state != SNDRV_PCM_STATE_OPEN)
313                 --oxfw->substreams_count;
314
315         snd_oxfw_stream_stop_duplex(oxfw);
316
317         mutex_unlock(&oxfw->mutex);
318
319         return snd_pcm_lib_free_pages(substream);
320 }
321
322 static int pcm_capture_prepare(struct snd_pcm_substream *substream)
323 {
324         struct snd_oxfw *oxfw = substream->private_data;
325         int err;
326
327         mutex_lock(&oxfw->mutex);
328         err = snd_oxfw_stream_start_duplex(oxfw);
329         mutex_unlock(&oxfw->mutex);
330         if (err < 0)
331                 goto end;
332
333         amdtp_stream_pcm_prepare(&oxfw->tx_stream);
334 end:
335         return err;
336 }
337 static int pcm_playback_prepare(struct snd_pcm_substream *substream)
338 {
339         struct snd_oxfw *oxfw = substream->private_data;
340         int err;
341
342         mutex_lock(&oxfw->mutex);
343         err = snd_oxfw_stream_start_duplex(oxfw);
344         mutex_unlock(&oxfw->mutex);
345         if (err < 0)
346                 goto end;
347
348         amdtp_stream_pcm_prepare(&oxfw->rx_stream);
349 end:
350         return err;
351 }
352
353 static int pcm_capture_trigger(struct snd_pcm_substream *substream, int cmd)
354 {
355         struct snd_oxfw *oxfw = substream->private_data;
356         struct snd_pcm_substream *pcm;
357
358         switch (cmd) {
359         case SNDRV_PCM_TRIGGER_START:
360                 pcm = substream;
361                 break;
362         case SNDRV_PCM_TRIGGER_STOP:
363                 pcm = NULL;
364                 break;
365         default:
366                 return -EINVAL;
367         }
368         amdtp_stream_pcm_trigger(&oxfw->tx_stream, pcm);
369         return 0;
370 }
371 static int pcm_playback_trigger(struct snd_pcm_substream *substream, int cmd)
372 {
373         struct snd_oxfw *oxfw = substream->private_data;
374         struct snd_pcm_substream *pcm;
375
376         switch (cmd) {
377         case SNDRV_PCM_TRIGGER_START:
378                 pcm = substream;
379                 break;
380         case SNDRV_PCM_TRIGGER_STOP:
381                 pcm = NULL;
382                 break;
383         default:
384                 return -EINVAL;
385         }
386         amdtp_stream_pcm_trigger(&oxfw->rx_stream, pcm);
387         return 0;
388 }
389
390 static snd_pcm_uframes_t pcm_capture_pointer(struct snd_pcm_substream *sbstm)
391 {
392         struct snd_oxfw *oxfw = sbstm->private_data;
393
394         return amdtp_domain_stream_pcm_pointer(&oxfw->domain, &oxfw->tx_stream);
395 }
396 static snd_pcm_uframes_t pcm_playback_pointer(struct snd_pcm_substream *sbstm)
397 {
398         struct snd_oxfw *oxfw = sbstm->private_data;
399
400         return amdtp_domain_stream_pcm_pointer(&oxfw->domain, &oxfw->rx_stream);
401 }
402
403 static int pcm_capture_ack(struct snd_pcm_substream *substream)
404 {
405         struct snd_oxfw *oxfw = substream->private_data;
406
407         return amdtp_domain_stream_pcm_ack(&oxfw->domain, &oxfw->tx_stream);
408 }
409
410 static int pcm_playback_ack(struct snd_pcm_substream *substream)
411 {
412         struct snd_oxfw *oxfw = substream->private_data;
413
414         return amdtp_domain_stream_pcm_ack(&oxfw->domain, &oxfw->rx_stream);
415 }
416
417 int snd_oxfw_create_pcm(struct snd_oxfw *oxfw)
418 {
419         static const struct snd_pcm_ops capture_ops = {
420                 .open      = pcm_open,
421                 .close     = pcm_close,
422                 .ioctl     = snd_pcm_lib_ioctl,
423                 .hw_params = pcm_capture_hw_params,
424                 .hw_free   = pcm_capture_hw_free,
425                 .prepare   = pcm_capture_prepare,
426                 .trigger   = pcm_capture_trigger,
427                 .pointer   = pcm_capture_pointer,
428                 .ack       = pcm_capture_ack,
429         };
430         static const struct snd_pcm_ops playback_ops = {
431                 .open      = pcm_open,
432                 .close     = pcm_close,
433                 .ioctl     = snd_pcm_lib_ioctl,
434                 .hw_params = pcm_playback_hw_params,
435                 .hw_free   = pcm_playback_hw_free,
436                 .prepare   = pcm_playback_prepare,
437                 .trigger   = pcm_playback_trigger,
438                 .pointer   = pcm_playback_pointer,
439                 .ack       = pcm_playback_ack,
440         };
441         struct snd_pcm *pcm;
442         unsigned int cap = 0;
443         int err;
444
445         if (oxfw->has_output)
446                 cap = 1;
447
448         err = snd_pcm_new(oxfw->card, oxfw->card->driver, 0, 1, cap, &pcm);
449         if (err < 0)
450                 return err;
451
452         pcm->private_data = oxfw;
453         strcpy(pcm->name, oxfw->card->shortname);
454         snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &playback_ops);
455         if (cap > 0)
456                 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &capture_ops);
457         snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_VMALLOC,
458                                               NULL, 0, 0);
459
460         return 0;
461 }