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Commit | Line | Data |
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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) { | |
125 | runtime->hw.formats = AMDTP_IN_PCM_FORMAT_BITS; | |
126 | s = &bebob->tx_stream; | |
127 | formations = bebob->tx_stream_formations; | |
128 | } else { | |
129 | runtime->hw.formats = AMDTP_OUT_PCM_FORMAT_BITS; | |
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 | ||
149 | err = amdtp_stream_add_pcm_hw_constraints(s, runtime); | |
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; | |
1fc9522a | 158 | struct snd_bebob_rate_spec *spec = bebob->spec->rate; |
fbbebd2c TS |
159 | unsigned int sampling_rate; |
160 | bool internal; | |
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 | ||
fbbebd2c TS |
171 | err = snd_bebob_stream_check_internal_clock(bebob, &internal); |
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 | */ | |
179 | if (!internal || | |
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; | |
214 | ||
215 | if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN) | |
216 | atomic_inc(&bebob->capture_substreams); | |
217 | amdtp_stream_set_pcm_format(&bebob->tx_stream, | |
218 | params_format(hw_params)); | |
219 | return snd_pcm_lib_alloc_vmalloc_buffer(substream, | |
220 | params_buffer_bytes(hw_params)); | |
221 | } | |
222 | static int | |
223 | pcm_playback_hw_params(struct snd_pcm_substream *substream, | |
224 | struct snd_pcm_hw_params *hw_params) | |
225 | { | |
226 | struct snd_bebob *bebob = substream->private_data; | |
227 | ||
228 | if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN) | |
229 | atomic_inc(&bebob->playback_substreams); | |
230 | amdtp_stream_set_pcm_format(&bebob->rx_stream, | |
231 | params_format(hw_params)); | |
232 | return snd_pcm_lib_alloc_vmalloc_buffer(substream, | |
233 | params_buffer_bytes(hw_params)); | |
234 | } | |
235 | ||
236 | static int | |
237 | pcm_capture_hw_free(struct snd_pcm_substream *substream) | |
238 | { | |
239 | struct snd_bebob *bebob = substream->private_data; | |
240 | ||
241 | if (substream->runtime->status->state != SNDRV_PCM_STATE_OPEN) | |
242 | atomic_dec(&bebob->capture_substreams); | |
243 | ||
244 | snd_bebob_stream_stop_duplex(bebob); | |
245 | ||
246 | return snd_pcm_lib_free_vmalloc_buffer(substream); | |
247 | } | |
248 | static int | |
249 | pcm_playback_hw_free(struct snd_pcm_substream *substream) | |
250 | { | |
251 | struct snd_bebob *bebob = substream->private_data; | |
252 | ||
253 | if (substream->runtime->status->state != SNDRV_PCM_STATE_OPEN) | |
254 | atomic_dec(&bebob->playback_substreams); | |
255 | ||
256 | snd_bebob_stream_stop_duplex(bebob); | |
257 | ||
258 | return snd_pcm_lib_free_vmalloc_buffer(substream); | |
259 | } | |
260 | ||
261 | static int | |
262 | pcm_capture_prepare(struct snd_pcm_substream *substream) | |
263 | { | |
264 | struct snd_bebob *bebob = substream->private_data; | |
265 | struct snd_pcm_runtime *runtime = substream->runtime; | |
266 | int err; | |
267 | ||
268 | err = snd_bebob_stream_start_duplex(bebob, runtime->rate); | |
269 | if (err >= 0) | |
270 | amdtp_stream_pcm_prepare(&bebob->tx_stream); | |
271 | ||
272 | return err; | |
273 | } | |
274 | static int | |
275 | pcm_playback_prepare(struct snd_pcm_substream *substream) | |
276 | { | |
277 | struct snd_bebob *bebob = substream->private_data; | |
278 | struct snd_pcm_runtime *runtime = substream->runtime; | |
279 | int err; | |
280 | ||
281 | err = snd_bebob_stream_start_duplex(bebob, runtime->rate); | |
282 | if (err >= 0) | |
283 | amdtp_stream_pcm_prepare(&bebob->rx_stream); | |
284 | ||
285 | return err; | |
286 | } | |
287 | ||
288 | static int | |
289 | pcm_capture_trigger(struct snd_pcm_substream *substream, int cmd) | |
290 | { | |
291 | struct snd_bebob *bebob = substream->private_data; | |
292 | ||
293 | switch (cmd) { | |
294 | case SNDRV_PCM_TRIGGER_START: | |
295 | amdtp_stream_pcm_trigger(&bebob->tx_stream, substream); | |
296 | break; | |
297 | case SNDRV_PCM_TRIGGER_STOP: | |
298 | amdtp_stream_pcm_trigger(&bebob->tx_stream, NULL); | |
299 | break; | |
300 | default: | |
301 | return -EINVAL; | |
302 | } | |
303 | ||
304 | return 0; | |
305 | } | |
306 | static int | |
307 | pcm_playback_trigger(struct snd_pcm_substream *substream, int cmd) | |
308 | { | |
309 | struct snd_bebob *bebob = substream->private_data; | |
310 | ||
311 | switch (cmd) { | |
312 | case SNDRV_PCM_TRIGGER_START: | |
313 | amdtp_stream_pcm_trigger(&bebob->rx_stream, substream); | |
314 | break; | |
315 | case SNDRV_PCM_TRIGGER_STOP: | |
316 | amdtp_stream_pcm_trigger(&bebob->rx_stream, NULL); | |
317 | break; | |
318 | default: | |
319 | return -EINVAL; | |
320 | } | |
321 | ||
322 | return 0; | |
323 | } | |
324 | ||
325 | static snd_pcm_uframes_t | |
326 | pcm_capture_pointer(struct snd_pcm_substream *sbstrm) | |
327 | { | |
328 | struct snd_bebob *bebob = sbstrm->private_data; | |
329 | return amdtp_stream_pcm_pointer(&bebob->tx_stream); | |
330 | } | |
331 | static snd_pcm_uframes_t | |
332 | pcm_playback_pointer(struct snd_pcm_substream *sbstrm) | |
333 | { | |
334 | struct snd_bebob *bebob = sbstrm->private_data; | |
335 | return amdtp_stream_pcm_pointer(&bebob->rx_stream); | |
336 | } | |
337 | ||
338 | static const struct snd_pcm_ops pcm_capture_ops = { | |
339 | .open = pcm_open, | |
340 | .close = pcm_close, | |
341 | .ioctl = snd_pcm_lib_ioctl, | |
342 | .hw_params = pcm_capture_hw_params, | |
343 | .hw_free = pcm_capture_hw_free, | |
344 | .prepare = pcm_capture_prepare, | |
345 | .trigger = pcm_capture_trigger, | |
346 | .pointer = pcm_capture_pointer, | |
347 | .page = snd_pcm_lib_get_vmalloc_page, | |
348 | }; | |
349 | static const struct snd_pcm_ops pcm_playback_ops = { | |
350 | .open = pcm_open, | |
351 | .close = pcm_close, | |
352 | .ioctl = snd_pcm_lib_ioctl, | |
353 | .hw_params = pcm_playback_hw_params, | |
354 | .hw_free = pcm_playback_hw_free, | |
355 | .prepare = pcm_playback_prepare, | |
356 | .trigger = pcm_playback_trigger, | |
357 | .pointer = pcm_playback_pointer, | |
358 | .page = snd_pcm_lib_get_vmalloc_page, | |
359 | .mmap = snd_pcm_lib_mmap_vmalloc, | |
360 | }; | |
361 | ||
362 | int snd_bebob_create_pcm_devices(struct snd_bebob *bebob) | |
363 | { | |
364 | struct snd_pcm *pcm; | |
365 | int err; | |
366 | ||
367 | err = snd_pcm_new(bebob->card, bebob->card->driver, 0, 1, 1, &pcm); | |
368 | if (err < 0) | |
369 | goto end; | |
370 | ||
371 | pcm->private_data = bebob; | |
372 | snprintf(pcm->name, sizeof(pcm->name), | |
373 | "%s PCM", bebob->card->shortname); | |
374 | snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &pcm_playback_ops); | |
375 | snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &pcm_capture_ops); | |
376 | end: | |
377 | return err; | |
378 | } |