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 | ||
95 | static void | |
96 | limit_period_and_buffer(struct snd_pcm_hardware *hw) | |
97 | { | |
98 | hw->periods_min = 2; /* SNDRV_PCM_INFO_BATCH */ | |
99 | hw->periods_max = UINT_MAX; | |
100 | ||
101 | hw->period_bytes_min = 4 * hw->channels_max; /* bytes for a frame */ | |
102 | ||
103 | /* Just to prevent from allocating much pages. */ | |
104 | hw->period_bytes_max = hw->period_bytes_min * 2048; | |
105 | hw->buffer_bytes_max = hw->period_bytes_max * hw->periods_min; | |
106 | } | |
107 | ||
108 | static int | |
109 | pcm_init_hw_params(struct snd_bebob *bebob, | |
110 | struct snd_pcm_substream *substream) | |
111 | { | |
112 | struct snd_pcm_runtime *runtime = substream->runtime; | |
113 | struct amdtp_stream *s; | |
114 | struct snd_bebob_stream_formation *formations; | |
115 | int err; | |
116 | ||
117 | runtime->hw.info = SNDRV_PCM_INFO_BATCH | | |
118 | SNDRV_PCM_INFO_BLOCK_TRANSFER | | |
119 | SNDRV_PCM_INFO_INTERLEAVED | | |
120 | SNDRV_PCM_INFO_JOINT_DUPLEX | | |
121 | SNDRV_PCM_INFO_MMAP | | |
122 | SNDRV_PCM_INFO_MMAP_VALID; | |
123 | ||
124 | if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) { | |
49c7b3fc | 125 | runtime->hw.formats = AM824_IN_PCM_FORMAT_BITS; |
fbbebd2c TS |
126 | s = &bebob->tx_stream; |
127 | formations = bebob->tx_stream_formations; | |
128 | } else { | |
49c7b3fc | 129 | runtime->hw.formats = AM824_OUT_PCM_FORMAT_BITS; |
fbbebd2c TS |
130 | s = &bebob->rx_stream; |
131 | formations = bebob->rx_stream_formations; | |
132 | } | |
133 | ||
134 | limit_channels_and_rates(&runtime->hw, formations); | |
135 | limit_period_and_buffer(&runtime->hw); | |
136 | ||
137 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS, | |
138 | hw_rule_channels, formations, | |
139 | SNDRV_PCM_HW_PARAM_RATE, -1); | |
140 | if (err < 0) | |
141 | goto end; | |
142 | ||
143 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE, | |
144 | hw_rule_rate, formations, | |
145 | SNDRV_PCM_HW_PARAM_CHANNELS, -1); | |
146 | if (err < 0) | |
147 | goto end; | |
148 | ||
bc8500da | 149 | err = amdtp_am824_add_pcm_hw_constraints(s, runtime); |
fbbebd2c TS |
150 | end: |
151 | return err; | |
152 | } | |
153 | ||
154 | static int | |
155 | pcm_open(struct snd_pcm_substream *substream) | |
156 | { | |
157 | struct snd_bebob *bebob = substream->private_data; | |
6b9866c8 | 158 | const struct snd_bebob_rate_spec *spec = bebob->spec->rate; |
fbbebd2c | 159 | unsigned int sampling_rate; |
3e254b16 | 160 | enum snd_bebob_clock_type src; |
fbbebd2c TS |
161 | int err; |
162 | ||
618eabea | 163 | err = snd_bebob_stream_lock_try(bebob); |
fbbebd2c TS |
164 | if (err < 0) |
165 | goto end; | |
166 | ||
618eabea TS |
167 | err = pcm_init_hw_params(bebob, substream); |
168 | if (err < 0) | |
169 | goto err_locked; | |
170 | ||
3e254b16 | 171 | err = snd_bebob_stream_get_clock_src(bebob, &src); |
fbbebd2c | 172 | if (err < 0) |
618eabea | 173 | goto err_locked; |
fbbebd2c TS |
174 | |
175 | /* | |
176 | * When source of clock is internal or any PCM stream are running, | |
177 | * the available sampling rate is limited at current sampling rate. | |
178 | */ | |
3e254b16 | 179 | if (src == SND_BEBOB_CLOCK_TYPE_EXTERNAL || |
fbbebd2c TS |
180 | amdtp_stream_pcm_running(&bebob->tx_stream) || |
181 | amdtp_stream_pcm_running(&bebob->rx_stream)) { | |
1fc9522a | 182 | err = spec->get(bebob, &sampling_rate); |
fbbebd2c TS |
183 | if (err < 0) { |
184 | dev_err(&bebob->unit->device, | |
185 | "fail to get sampling rate: %d\n", err); | |
618eabea | 186 | goto err_locked; |
fbbebd2c TS |
187 | } |
188 | ||
189 | substream->runtime->hw.rate_min = sampling_rate; | |
190 | substream->runtime->hw.rate_max = sampling_rate; | |
191 | } | |
192 | ||
193 | snd_pcm_set_sync(substream); | |
fbbebd2c TS |
194 | end: |
195 | return err; | |
618eabea TS |
196 | err_locked: |
197 | snd_bebob_stream_lock_release(bebob); | |
198 | return err; | |
fbbebd2c TS |
199 | } |
200 | ||
201 | static int | |
202 | pcm_close(struct snd_pcm_substream *substream) | |
203 | { | |
618eabea TS |
204 | struct snd_bebob *bebob = substream->private_data; |
205 | snd_bebob_stream_lock_release(bebob); | |
fbbebd2c TS |
206 | return 0; |
207 | } | |
208 | ||
209 | static int | |
210 | pcm_capture_hw_params(struct snd_pcm_substream *substream, | |
211 | struct snd_pcm_hw_params *hw_params) | |
212 | { | |
213 | struct snd_bebob *bebob = substream->private_data; | |
22c103cd TS |
214 | int err; |
215 | ||
216 | err = snd_pcm_lib_alloc_vmalloc_buffer(substream, | |
217 | params_buffer_bytes(hw_params)); | |
218 | if (err < 0) | |
219 | return err; | |
fbbebd2c | 220 | |
2a71e701 TS |
221 | if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN) { |
222 | mutex_lock(&bebob->mutex); | |
4fd6c6c7 | 223 | bebob->substreams_counter++; |
2a71e701 TS |
224 | mutex_unlock(&bebob->mutex); |
225 | } | |
85130cb4 TS |
226 | |
227 | amdtp_am824_set_pcm_format(&bebob->tx_stream, params_format(hw_params)); | |
22c103cd TS |
228 | |
229 | return 0; | |
fbbebd2c TS |
230 | } |
231 | static int | |
232 | pcm_playback_hw_params(struct snd_pcm_substream *substream, | |
233 | struct snd_pcm_hw_params *hw_params) | |
234 | { | |
235 | struct snd_bebob *bebob = substream->private_data; | |
22c103cd TS |
236 | int err; |
237 | ||
238 | err = snd_pcm_lib_alloc_vmalloc_buffer(substream, | |
239 | params_buffer_bytes(hw_params)); | |
240 | if (err < 0) | |
241 | return err; | |
fbbebd2c | 242 | |
2a71e701 TS |
243 | if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN) { |
244 | mutex_lock(&bebob->mutex); | |
4fd6c6c7 | 245 | bebob->substreams_counter++; |
2a71e701 TS |
246 | mutex_unlock(&bebob->mutex); |
247 | } | |
85130cb4 TS |
248 | |
249 | amdtp_am824_set_pcm_format(&bebob->rx_stream, params_format(hw_params)); | |
22c103cd TS |
250 | |
251 | return 0; | |
fbbebd2c TS |
252 | } |
253 | ||
254 | static int | |
255 | pcm_capture_hw_free(struct snd_pcm_substream *substream) | |
256 | { | |
257 | struct snd_bebob *bebob = substream->private_data; | |
258 | ||
2a71e701 TS |
259 | if (substream->runtime->status->state != SNDRV_PCM_STATE_OPEN) { |
260 | mutex_lock(&bebob->mutex); | |
4fd6c6c7 | 261 | bebob->substreams_counter--; |
2a71e701 TS |
262 | mutex_unlock(&bebob->mutex); |
263 | } | |
fbbebd2c TS |
264 | |
265 | snd_bebob_stream_stop_duplex(bebob); | |
266 | ||
267 | return snd_pcm_lib_free_vmalloc_buffer(substream); | |
268 | } | |
269 | static int | |
270 | pcm_playback_hw_free(struct snd_pcm_substream *substream) | |
271 | { | |
272 | struct snd_bebob *bebob = substream->private_data; | |
273 | ||
2a71e701 TS |
274 | if (substream->runtime->status->state != SNDRV_PCM_STATE_OPEN) { |
275 | mutex_lock(&bebob->mutex); | |
4fd6c6c7 | 276 | bebob->substreams_counter--; |
2a71e701 TS |
277 | mutex_unlock(&bebob->mutex); |
278 | } | |
fbbebd2c TS |
279 | |
280 | snd_bebob_stream_stop_duplex(bebob); | |
281 | ||
282 | return snd_pcm_lib_free_vmalloc_buffer(substream); | |
283 | } | |
284 | ||
285 | static int | |
286 | pcm_capture_prepare(struct snd_pcm_substream *substream) | |
287 | { | |
288 | struct snd_bebob *bebob = substream->private_data; | |
289 | struct snd_pcm_runtime *runtime = substream->runtime; | |
290 | int err; | |
291 | ||
292 | err = snd_bebob_stream_start_duplex(bebob, runtime->rate); | |
293 | if (err >= 0) | |
294 | amdtp_stream_pcm_prepare(&bebob->tx_stream); | |
295 | ||
296 | return err; | |
297 | } | |
298 | static int | |
299 | pcm_playback_prepare(struct snd_pcm_substream *substream) | |
300 | { | |
301 | struct snd_bebob *bebob = substream->private_data; | |
302 | struct snd_pcm_runtime *runtime = substream->runtime; | |
303 | int err; | |
304 | ||
305 | err = snd_bebob_stream_start_duplex(bebob, runtime->rate); | |
306 | if (err >= 0) | |
307 | amdtp_stream_pcm_prepare(&bebob->rx_stream); | |
308 | ||
309 | return err; | |
310 | } | |
311 | ||
312 | static int | |
313 | pcm_capture_trigger(struct snd_pcm_substream *substream, int cmd) | |
314 | { | |
315 | struct snd_bebob *bebob = substream->private_data; | |
316 | ||
317 | switch (cmd) { | |
318 | case SNDRV_PCM_TRIGGER_START: | |
319 | amdtp_stream_pcm_trigger(&bebob->tx_stream, substream); | |
320 | break; | |
321 | case SNDRV_PCM_TRIGGER_STOP: | |
322 | amdtp_stream_pcm_trigger(&bebob->tx_stream, NULL); | |
323 | break; | |
324 | default: | |
325 | return -EINVAL; | |
326 | } | |
327 | ||
328 | return 0; | |
329 | } | |
330 | static int | |
331 | pcm_playback_trigger(struct snd_pcm_substream *substream, int cmd) | |
332 | { | |
333 | struct snd_bebob *bebob = substream->private_data; | |
334 | ||
335 | switch (cmd) { | |
336 | case SNDRV_PCM_TRIGGER_START: | |
337 | amdtp_stream_pcm_trigger(&bebob->rx_stream, substream); | |
338 | break; | |
339 | case SNDRV_PCM_TRIGGER_STOP: | |
340 | amdtp_stream_pcm_trigger(&bebob->rx_stream, NULL); | |
341 | break; | |
342 | default: | |
343 | return -EINVAL; | |
344 | } | |
345 | ||
346 | return 0; | |
347 | } | |
348 | ||
349 | static snd_pcm_uframes_t | |
350 | pcm_capture_pointer(struct snd_pcm_substream *sbstrm) | |
351 | { | |
352 | struct snd_bebob *bebob = sbstrm->private_data; | |
353 | return amdtp_stream_pcm_pointer(&bebob->tx_stream); | |
354 | } | |
355 | static snd_pcm_uframes_t | |
356 | pcm_playback_pointer(struct snd_pcm_substream *sbstrm) | |
357 | { | |
358 | struct snd_bebob *bebob = sbstrm->private_data; | |
359 | return amdtp_stream_pcm_pointer(&bebob->rx_stream); | |
360 | } | |
361 | ||
362 | static const struct snd_pcm_ops pcm_capture_ops = { | |
363 | .open = pcm_open, | |
364 | .close = pcm_close, | |
365 | .ioctl = snd_pcm_lib_ioctl, | |
366 | .hw_params = pcm_capture_hw_params, | |
367 | .hw_free = pcm_capture_hw_free, | |
368 | .prepare = pcm_capture_prepare, | |
369 | .trigger = pcm_capture_trigger, | |
370 | .pointer = pcm_capture_pointer, | |
371 | .page = snd_pcm_lib_get_vmalloc_page, | |
372 | }; | |
373 | static const struct snd_pcm_ops pcm_playback_ops = { | |
374 | .open = pcm_open, | |
375 | .close = pcm_close, | |
376 | .ioctl = snd_pcm_lib_ioctl, | |
377 | .hw_params = pcm_playback_hw_params, | |
378 | .hw_free = pcm_playback_hw_free, | |
379 | .prepare = pcm_playback_prepare, | |
380 | .trigger = pcm_playback_trigger, | |
381 | .pointer = pcm_playback_pointer, | |
382 | .page = snd_pcm_lib_get_vmalloc_page, | |
383 | .mmap = snd_pcm_lib_mmap_vmalloc, | |
384 | }; | |
385 | ||
386 | int snd_bebob_create_pcm_devices(struct snd_bebob *bebob) | |
387 | { | |
388 | struct snd_pcm *pcm; | |
389 | int err; | |
390 | ||
391 | err = snd_pcm_new(bebob->card, bebob->card->driver, 0, 1, 1, &pcm); | |
392 | if (err < 0) | |
393 | goto end; | |
394 | ||
395 | pcm->private_data = bebob; | |
396 | snprintf(pcm->name, sizeof(pcm->name), | |
397 | "%s PCM", bebob->card->shortname); | |
398 | snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &pcm_playback_ops); | |
399 | snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &pcm_capture_ops); | |
400 | end: | |
401 | return err; | |
402 | } |