Commit | Line | Data |
---|---|---|
fbbebd2c TS |
1 | /* |
2 | * bebob_pcm.c - a part of driver for BeBoB based devices | |
3 | * | |
4 | * Copyright (c) 2013-2014 Takashi Sakamoto | |
5 | * | |
6 | * Licensed under the terms of the GNU General Public License, version 2. | |
7 | */ | |
8 | ||
9 | #include "./bebob.h" | |
10 | ||
11 | static int | |
12 | hw_rule_rate(struct snd_pcm_hw_params *params, struct snd_pcm_hw_rule *rule) | |
13 | { | |
14 | struct snd_bebob_stream_formation *formations = rule->private; | |
15 | struct snd_interval *r = | |
16 | hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE); | |
17 | const struct snd_interval *c = | |
18 | hw_param_interval_c(params, SNDRV_PCM_HW_PARAM_CHANNELS); | |
19 | struct snd_interval t = { | |
20 | .min = UINT_MAX, .max = 0, .integer = 1 | |
21 | }; | |
22 | unsigned int i; | |
23 | ||
24 | for (i = 0; i < SND_BEBOB_STRM_FMT_ENTRIES; i++) { | |
25 | /* entry is invalid */ | |
26 | if (formations[i].pcm == 0) | |
27 | continue; | |
28 | ||
29 | if (!snd_interval_test(c, formations[i].pcm)) | |
30 | continue; | |
31 | ||
32 | t.min = min(t.min, snd_bebob_rate_table[i]); | |
33 | t.max = max(t.max, snd_bebob_rate_table[i]); | |
34 | ||
35 | } | |
36 | return snd_interval_refine(r, &t); | |
37 | } | |
38 | ||
39 | static int | |
40 | hw_rule_channels(struct snd_pcm_hw_params *params, struct snd_pcm_hw_rule *rule) | |
41 | { | |
42 | struct snd_bebob_stream_formation *formations = rule->private; | |
43 | struct snd_interval *c = | |
44 | hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS); | |
45 | const struct snd_interval *r = | |
46 | hw_param_interval_c(params, SNDRV_PCM_HW_PARAM_RATE); | |
47 | struct snd_interval t = { | |
48 | .min = UINT_MAX, .max = 0, .integer = 1 | |
49 | }; | |
50 | ||
51 | unsigned int i; | |
52 | ||
53 | for (i = 0; i < SND_BEBOB_STRM_FMT_ENTRIES; i++) { | |
54 | /* entry is invalid */ | |
55 | if (formations[i].pcm == 0) | |
56 | continue; | |
57 | ||
58 | if (!snd_interval_test(r, snd_bebob_rate_table[i])) | |
59 | continue; | |
60 | ||
61 | t.min = min(t.min, formations[i].pcm); | |
62 | t.max = max(t.max, formations[i].pcm); | |
63 | } | |
64 | ||
65 | return snd_interval_refine(c, &t); | |
66 | } | |
67 | ||
68 | static void | |
69 | limit_channels_and_rates(struct snd_pcm_hardware *hw, | |
70 | struct snd_bebob_stream_formation *formations) | |
71 | { | |
72 | unsigned int i; | |
73 | ||
74 | hw->channels_min = UINT_MAX; | |
75 | hw->channels_max = 0; | |
76 | ||
77 | hw->rate_min = UINT_MAX; | |
78 | hw->rate_max = 0; | |
79 | hw->rates = 0; | |
80 | ||
81 | for (i = 0; i < SND_BEBOB_STRM_FMT_ENTRIES; i++) { | |
82 | /* entry has no PCM channels */ | |
83 | if (formations[i].pcm == 0) | |
84 | continue; | |
85 | ||
86 | hw->channels_min = min(hw->channels_min, formations[i].pcm); | |
87 | hw->channels_max = max(hw->channels_max, formations[i].pcm); | |
88 | ||
89 | hw->rate_min = min(hw->rate_min, snd_bebob_rate_table[i]); | |
90 | hw->rate_max = max(hw->rate_max, snd_bebob_rate_table[i]); | |
91 | hw->rates |= snd_pcm_rate_to_rate_bit(snd_bebob_rate_table[i]); | |
92 | } | |
93 | } | |
94 | ||
fbbebd2c TS |
95 | static int |
96 | pcm_init_hw_params(struct snd_bebob *bebob, | |
97 | struct snd_pcm_substream *substream) | |
98 | { | |
99 | struct snd_pcm_runtime *runtime = substream->runtime; | |
100 | struct amdtp_stream *s; | |
101 | struct snd_bebob_stream_formation *formations; | |
102 | int err; | |
103 | ||
fbbebd2c | 104 | if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) { |
49c7b3fc | 105 | runtime->hw.formats = AM824_IN_PCM_FORMAT_BITS; |
fbbebd2c TS |
106 | s = &bebob->tx_stream; |
107 | formations = bebob->tx_stream_formations; | |
108 | } else { | |
49c7b3fc | 109 | runtime->hw.formats = AM824_OUT_PCM_FORMAT_BITS; |
fbbebd2c TS |
110 | s = &bebob->rx_stream; |
111 | formations = bebob->rx_stream_formations; | |
112 | } | |
113 | ||
114 | limit_channels_and_rates(&runtime->hw, formations); | |
fbbebd2c TS |
115 | |
116 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS, | |
117 | hw_rule_channels, formations, | |
118 | SNDRV_PCM_HW_PARAM_RATE, -1); | |
119 | if (err < 0) | |
120 | goto end; | |
121 | ||
122 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE, | |
123 | hw_rule_rate, formations, | |
124 | SNDRV_PCM_HW_PARAM_CHANNELS, -1); | |
125 | if (err < 0) | |
126 | goto end; | |
127 | ||
bc8500da | 128 | err = amdtp_am824_add_pcm_hw_constraints(s, runtime); |
fbbebd2c TS |
129 | end: |
130 | return err; | |
131 | } | |
132 | ||
133 | static int | |
134 | pcm_open(struct snd_pcm_substream *substream) | |
135 | { | |
136 | struct snd_bebob *bebob = substream->private_data; | |
6b9866c8 | 137 | const struct snd_bebob_rate_spec *spec = bebob->spec->rate; |
fbbebd2c | 138 | unsigned int sampling_rate; |
3e254b16 | 139 | enum snd_bebob_clock_type src; |
fbbebd2c TS |
140 | int err; |
141 | ||
618eabea | 142 | err = snd_bebob_stream_lock_try(bebob); |
fbbebd2c TS |
143 | if (err < 0) |
144 | goto end; | |
145 | ||
618eabea TS |
146 | err = pcm_init_hw_params(bebob, substream); |
147 | if (err < 0) | |
148 | goto err_locked; | |
149 | ||
3e254b16 | 150 | err = snd_bebob_stream_get_clock_src(bebob, &src); |
fbbebd2c | 151 | if (err < 0) |
618eabea | 152 | goto err_locked; |
fbbebd2c TS |
153 | |
154 | /* | |
155 | * When source of clock is internal or any PCM stream are running, | |
156 | * the available sampling rate is limited at current sampling rate. | |
157 | */ | |
3e254b16 | 158 | if (src == SND_BEBOB_CLOCK_TYPE_EXTERNAL || |
fbbebd2c TS |
159 | amdtp_stream_pcm_running(&bebob->tx_stream) || |
160 | amdtp_stream_pcm_running(&bebob->rx_stream)) { | |
1fc9522a | 161 | err = spec->get(bebob, &sampling_rate); |
fbbebd2c TS |
162 | if (err < 0) { |
163 | dev_err(&bebob->unit->device, | |
164 | "fail to get sampling rate: %d\n", err); | |
618eabea | 165 | goto err_locked; |
fbbebd2c TS |
166 | } |
167 | ||
168 | substream->runtime->hw.rate_min = sampling_rate; | |
169 | substream->runtime->hw.rate_max = sampling_rate; | |
170 | } | |
171 | ||
172 | snd_pcm_set_sync(substream); | |
fbbebd2c TS |
173 | end: |
174 | return err; | |
618eabea TS |
175 | err_locked: |
176 | snd_bebob_stream_lock_release(bebob); | |
177 | return err; | |
fbbebd2c TS |
178 | } |
179 | ||
180 | static int | |
181 | pcm_close(struct snd_pcm_substream *substream) | |
182 | { | |
618eabea TS |
183 | struct snd_bebob *bebob = substream->private_data; |
184 | snd_bebob_stream_lock_release(bebob); | |
fbbebd2c TS |
185 | return 0; |
186 | } | |
187 | ||
188 | static int | |
189 | pcm_capture_hw_params(struct snd_pcm_substream *substream, | |
190 | struct snd_pcm_hw_params *hw_params) | |
191 | { | |
192 | struct snd_bebob *bebob = substream->private_data; | |
22c103cd TS |
193 | int err; |
194 | ||
195 | err = snd_pcm_lib_alloc_vmalloc_buffer(substream, | |
196 | params_buffer_bytes(hw_params)); | |
197 | if (err < 0) | |
198 | return err; | |
fbbebd2c | 199 | |
2a71e701 TS |
200 | if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN) { |
201 | mutex_lock(&bebob->mutex); | |
4fd6c6c7 | 202 | bebob->substreams_counter++; |
2a71e701 TS |
203 | mutex_unlock(&bebob->mutex); |
204 | } | |
85130cb4 | 205 | |
22c103cd | 206 | return 0; |
fbbebd2c TS |
207 | } |
208 | static int | |
209 | pcm_playback_hw_params(struct snd_pcm_substream *substream, | |
210 | struct snd_pcm_hw_params *hw_params) | |
211 | { | |
212 | struct snd_bebob *bebob = substream->private_data; | |
22c103cd TS |
213 | int err; |
214 | ||
215 | err = snd_pcm_lib_alloc_vmalloc_buffer(substream, | |
216 | params_buffer_bytes(hw_params)); | |
217 | if (err < 0) | |
218 | return err; | |
fbbebd2c | 219 | |
2a71e701 TS |
220 | if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN) { |
221 | mutex_lock(&bebob->mutex); | |
4fd6c6c7 | 222 | bebob->substreams_counter++; |
2a71e701 TS |
223 | mutex_unlock(&bebob->mutex); |
224 | } | |
85130cb4 | 225 | |
22c103cd | 226 | return 0; |
fbbebd2c TS |
227 | } |
228 | ||
229 | static int | |
230 | pcm_capture_hw_free(struct snd_pcm_substream *substream) | |
231 | { | |
232 | struct snd_bebob *bebob = substream->private_data; | |
233 | ||
2a71e701 TS |
234 | if (substream->runtime->status->state != SNDRV_PCM_STATE_OPEN) { |
235 | mutex_lock(&bebob->mutex); | |
4fd6c6c7 | 236 | bebob->substreams_counter--; |
2a71e701 TS |
237 | mutex_unlock(&bebob->mutex); |
238 | } | |
fbbebd2c TS |
239 | |
240 | snd_bebob_stream_stop_duplex(bebob); | |
241 | ||
242 | return snd_pcm_lib_free_vmalloc_buffer(substream); | |
243 | } | |
244 | static int | |
245 | pcm_playback_hw_free(struct snd_pcm_substream *substream) | |
246 | { | |
247 | struct snd_bebob *bebob = substream->private_data; | |
248 | ||
2a71e701 TS |
249 | if (substream->runtime->status->state != SNDRV_PCM_STATE_OPEN) { |
250 | mutex_lock(&bebob->mutex); | |
4fd6c6c7 | 251 | bebob->substreams_counter--; |
2a71e701 TS |
252 | mutex_unlock(&bebob->mutex); |
253 | } | |
fbbebd2c TS |
254 | |
255 | snd_bebob_stream_stop_duplex(bebob); | |
256 | ||
257 | return snd_pcm_lib_free_vmalloc_buffer(substream); | |
258 | } | |
259 | ||
260 | static int | |
261 | pcm_capture_prepare(struct snd_pcm_substream *substream) | |
262 | { | |
263 | struct snd_bebob *bebob = substream->private_data; | |
264 | struct snd_pcm_runtime *runtime = substream->runtime; | |
265 | int err; | |
266 | ||
267 | err = snd_bebob_stream_start_duplex(bebob, runtime->rate); | |
268 | if (err >= 0) | |
269 | amdtp_stream_pcm_prepare(&bebob->tx_stream); | |
270 | ||
271 | return err; | |
272 | } | |
273 | static int | |
274 | pcm_playback_prepare(struct snd_pcm_substream *substream) | |
275 | { | |
276 | struct snd_bebob *bebob = substream->private_data; | |
277 | struct snd_pcm_runtime *runtime = substream->runtime; | |
278 | int err; | |
279 | ||
280 | err = snd_bebob_stream_start_duplex(bebob, runtime->rate); | |
281 | if (err >= 0) | |
282 | amdtp_stream_pcm_prepare(&bebob->rx_stream); | |
283 | ||
284 | return err; | |
285 | } | |
286 | ||
287 | static int | |
288 | pcm_capture_trigger(struct snd_pcm_substream *substream, int cmd) | |
289 | { | |
290 | struct snd_bebob *bebob = substream->private_data; | |
291 | ||
292 | switch (cmd) { | |
293 | case SNDRV_PCM_TRIGGER_START: | |
294 | amdtp_stream_pcm_trigger(&bebob->tx_stream, substream); | |
295 | break; | |
296 | case SNDRV_PCM_TRIGGER_STOP: | |
297 | amdtp_stream_pcm_trigger(&bebob->tx_stream, NULL); | |
298 | break; | |
299 | default: | |
300 | return -EINVAL; | |
301 | } | |
302 | ||
303 | return 0; | |
304 | } | |
305 | static int | |
306 | pcm_playback_trigger(struct snd_pcm_substream *substream, int cmd) | |
307 | { | |
308 | struct snd_bebob *bebob = substream->private_data; | |
309 | ||
310 | switch (cmd) { | |
311 | case SNDRV_PCM_TRIGGER_START: | |
312 | amdtp_stream_pcm_trigger(&bebob->rx_stream, substream); | |
313 | break; | |
314 | case SNDRV_PCM_TRIGGER_STOP: | |
315 | amdtp_stream_pcm_trigger(&bebob->rx_stream, NULL); | |
316 | break; | |
317 | default: | |
318 | return -EINVAL; | |
319 | } | |
320 | ||
321 | return 0; | |
322 | } | |
323 | ||
324 | static snd_pcm_uframes_t | |
325 | pcm_capture_pointer(struct snd_pcm_substream *sbstrm) | |
326 | { | |
327 | struct snd_bebob *bebob = sbstrm->private_data; | |
328 | return amdtp_stream_pcm_pointer(&bebob->tx_stream); | |
329 | } | |
330 | static snd_pcm_uframes_t | |
331 | pcm_playback_pointer(struct snd_pcm_substream *sbstrm) | |
332 | { | |
333 | struct snd_bebob *bebob = sbstrm->private_data; | |
334 | return amdtp_stream_pcm_pointer(&bebob->rx_stream); | |
335 | } | |
336 | ||
875becf8 TS |
337 | static int pcm_capture_ack(struct snd_pcm_substream *substream) |
338 | { | |
339 | struct snd_bebob *bebob = substream->private_data; | |
340 | ||
341 | return amdtp_stream_pcm_ack(&bebob->tx_stream); | |
342 | } | |
343 | ||
344 | static int pcm_playback_ack(struct snd_pcm_substream *substream) | |
345 | { | |
346 | struct snd_bebob *bebob = substream->private_data; | |
347 | ||
348 | return amdtp_stream_pcm_ack(&bebob->rx_stream); | |
349 | } | |
350 | ||
fbbebd2c TS |
351 | int snd_bebob_create_pcm_devices(struct snd_bebob *bebob) |
352 | { | |
4780f774 TS |
353 | static const struct snd_pcm_ops capture_ops = { |
354 | .open = pcm_open, | |
355 | .close = pcm_close, | |
356 | .ioctl = snd_pcm_lib_ioctl, | |
357 | .hw_params = pcm_capture_hw_params, | |
358 | .hw_free = pcm_capture_hw_free, | |
359 | .prepare = pcm_capture_prepare, | |
360 | .trigger = pcm_capture_trigger, | |
361 | .pointer = pcm_capture_pointer, | |
875becf8 | 362 | .ack = pcm_capture_ack, |
4780f774 TS |
363 | .page = snd_pcm_lib_get_vmalloc_page, |
364 | }; | |
365 | static const struct snd_pcm_ops playback_ops = { | |
366 | .open = pcm_open, | |
367 | .close = pcm_close, | |
368 | .ioctl = snd_pcm_lib_ioctl, | |
369 | .hw_params = pcm_playback_hw_params, | |
370 | .hw_free = pcm_playback_hw_free, | |
371 | .prepare = pcm_playback_prepare, | |
372 | .trigger = pcm_playback_trigger, | |
373 | .pointer = pcm_playback_pointer, | |
875becf8 | 374 | .ack = pcm_playback_ack, |
4780f774 TS |
375 | .page = snd_pcm_lib_get_vmalloc_page, |
376 | .mmap = snd_pcm_lib_mmap_vmalloc, | |
377 | }; | |
fbbebd2c TS |
378 | struct snd_pcm *pcm; |
379 | int err; | |
380 | ||
381 | err = snd_pcm_new(bebob->card, bebob->card->driver, 0, 1, 1, &pcm); | |
382 | if (err < 0) | |
383 | goto end; | |
384 | ||
385 | pcm->private_data = bebob; | |
386 | snprintf(pcm->name, sizeof(pcm->name), | |
387 | "%s PCM", bebob->card->shortname); | |
4780f774 TS |
388 | snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &playback_ops); |
389 | snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &capture_ops); | |
fbbebd2c TS |
390 | end: |
391 | return err; | |
392 | } |