1 | // SPDX-License-Identifier: GPL-2.0-only |
2 | /* |
3 | * ff-pcm.c - a part of driver for RME Fireface series |
4 | * |
5 | * Copyright (c) 2015-2017 Takashi Sakamoto |
6 | */ |
7 | |
8 | #include "ff.h" |
9 | |
10 | static int hw_rule_rate(struct snd_pcm_hw_params *params, |
11 | struct snd_pcm_hw_rule *rule) |
12 | { |
13 | const unsigned int *pcm_channels = 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 | unsigned int i; |
22 | |
23 | for (i = 0; i < ARRAY_SIZE(amdtp_rate_table); i++) { |
24 | enum snd_ff_stream_mode mode; |
25 | int err; |
26 | |
27 | err = snd_ff_stream_get_multiplier_mode(sfc: i, mode: &mode); |
28 | if (err < 0) |
29 | continue; |
30 | |
31 | if (!snd_interval_test(i: c, val: pcm_channels[mode])) |
32 | continue; |
33 | |
34 | t.min = min(t.min, amdtp_rate_table[i]); |
35 | t.max = max(t.max, amdtp_rate_table[i]); |
36 | } |
37 | |
38 | return snd_interval_refine(i: r, v: &t); |
39 | } |
40 | |
41 | static int hw_rule_channels(struct snd_pcm_hw_params *params, |
42 | struct snd_pcm_hw_rule *rule) |
43 | { |
44 | const unsigned int *pcm_channels = 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_interval t = { |
50 | .min = UINT_MAX, .max = 0, .integer = 1 |
51 | }; |
52 | unsigned int i; |
53 | |
54 | for (i = 0; i < ARRAY_SIZE(amdtp_rate_table); i++) { |
55 | enum snd_ff_stream_mode mode; |
56 | int err; |
57 | |
58 | err = snd_ff_stream_get_multiplier_mode(sfc: i, mode: &mode); |
59 | if (err < 0) |
60 | continue; |
61 | |
62 | if (!snd_interval_test(i: r, val: amdtp_rate_table[i])) |
63 | continue; |
64 | |
65 | t.min = min(t.min, pcm_channels[mode]); |
66 | t.max = max(t.max, pcm_channels[mode]); |
67 | } |
68 | |
69 | return snd_interval_refine(i: c, v: &t); |
70 | } |
71 | |
72 | static void limit_channels_and_rates(struct snd_pcm_hardware *hw, |
73 | const unsigned int *pcm_channels) |
74 | { |
75 | unsigned int rate, channels; |
76 | int i; |
77 | |
78 | hw->channels_min = UINT_MAX; |
79 | hw->channels_max = 0; |
80 | hw->rate_min = UINT_MAX; |
81 | hw->rate_max = 0; |
82 | |
83 | for (i = 0; i < ARRAY_SIZE(amdtp_rate_table); i++) { |
84 | enum snd_ff_stream_mode mode; |
85 | int err; |
86 | |
87 | err = snd_ff_stream_get_multiplier_mode(sfc: i, mode: &mode); |
88 | if (err < 0) |
89 | continue; |
90 | |
91 | channels = pcm_channels[mode]; |
92 | if (pcm_channels[mode] == 0) |
93 | continue; |
94 | hw->channels_min = min(hw->channels_min, channels); |
95 | hw->channels_max = max(hw->channels_max, channels); |
96 | |
97 | rate = amdtp_rate_table[i]; |
98 | hw->rates |= snd_pcm_rate_to_rate_bit(rate); |
99 | hw->rate_min = min(hw->rate_min, rate); |
100 | hw->rate_max = max(hw->rate_max, rate); |
101 | } |
102 | } |
103 | |
104 | static int pcm_init_hw_params(struct snd_ff *ff, |
105 | struct snd_pcm_substream *substream) |
106 | { |
107 | struct snd_pcm_runtime *runtime = substream->runtime; |
108 | struct amdtp_stream *s; |
109 | const unsigned int *pcm_channels; |
110 | int err; |
111 | |
112 | if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) { |
113 | runtime->hw.formats = SNDRV_PCM_FMTBIT_S32; |
114 | s = &ff->tx_stream; |
115 | pcm_channels = ff->spec->pcm_capture_channels; |
116 | } else { |
117 | runtime->hw.formats = SNDRV_PCM_FMTBIT_S32; |
118 | s = &ff->rx_stream; |
119 | pcm_channels = ff->spec->pcm_playback_channels; |
120 | } |
121 | |
122 | limit_channels_and_rates(hw: &runtime->hw, pcm_channels); |
123 | |
124 | err = snd_pcm_hw_rule_add(runtime, cond: 0, SNDRV_PCM_HW_PARAM_CHANNELS, |
125 | func: hw_rule_channels, private: (void *)pcm_channels, |
126 | SNDRV_PCM_HW_PARAM_RATE, -1); |
127 | if (err < 0) |
128 | return err; |
129 | |
130 | err = snd_pcm_hw_rule_add(runtime, cond: 0, SNDRV_PCM_HW_PARAM_RATE, |
131 | func: hw_rule_rate, private: (void *)pcm_channels, |
132 | SNDRV_PCM_HW_PARAM_CHANNELS, -1); |
133 | if (err < 0) |
134 | return err; |
135 | |
136 | return amdtp_ff_add_pcm_hw_constraints(s, runtime); |
137 | } |
138 | |
139 | static int pcm_open(struct snd_pcm_substream *substream) |
140 | { |
141 | struct snd_ff *ff = substream->private_data; |
142 | struct amdtp_domain *d = &ff->domain; |
143 | unsigned int rate; |
144 | enum snd_ff_clock_src src; |
145 | int i, err; |
146 | |
147 | err = snd_ff_stream_lock_try(ff); |
148 | if (err < 0) |
149 | return err; |
150 | |
151 | err = pcm_init_hw_params(ff, substream); |
152 | if (err < 0) |
153 | goto release_lock; |
154 | |
155 | err = ff->spec->protocol->get_clock(ff, &rate, &src); |
156 | if (err < 0) |
157 | goto release_lock; |
158 | |
159 | mutex_lock(&ff->mutex); |
160 | |
161 | // When source of clock is not internal or any stream is reserved for |
162 | // transmission of PCM frames, the available sampling rate is limited |
163 | // at current one. |
164 | if (src != SND_FF_CLOCK_SRC_INTERNAL) { |
165 | for (i = 0; i < CIP_SFC_COUNT; ++i) { |
166 | if (amdtp_rate_table[i] == rate) |
167 | break; |
168 | } |
169 | |
170 | // The unit is configured at sampling frequency which packet |
171 | // streaming engine can't support. |
172 | if (i >= CIP_SFC_COUNT) { |
173 | mutex_unlock(lock: &ff->mutex); |
174 | err = -EIO; |
175 | goto release_lock; |
176 | } |
177 | |
178 | substream->runtime->hw.rate_min = rate; |
179 | substream->runtime->hw.rate_max = rate; |
180 | } else { |
181 | if (ff->substreams_counter > 0) { |
182 | unsigned int frames_per_period = d->events_per_period; |
183 | unsigned int frames_per_buffer = d->events_per_buffer; |
184 | |
185 | rate = amdtp_rate_table[ff->rx_stream.sfc]; |
186 | substream->runtime->hw.rate_min = rate; |
187 | substream->runtime->hw.rate_max = rate; |
188 | |
189 | err = snd_pcm_hw_constraint_minmax(runtime: substream->runtime, |
190 | SNDRV_PCM_HW_PARAM_PERIOD_SIZE, |
191 | min: frames_per_period, max: frames_per_period); |
192 | if (err < 0) { |
193 | mutex_unlock(lock: &ff->mutex); |
194 | goto release_lock; |
195 | } |
196 | |
197 | err = snd_pcm_hw_constraint_minmax(runtime: substream->runtime, |
198 | SNDRV_PCM_HW_PARAM_BUFFER_SIZE, |
199 | min: frames_per_buffer, max: frames_per_buffer); |
200 | if (err < 0) { |
201 | mutex_unlock(lock: &ff->mutex); |
202 | goto release_lock; |
203 | } |
204 | } |
205 | } |
206 | |
207 | mutex_unlock(lock: &ff->mutex); |
208 | |
209 | snd_pcm_set_sync(substream); |
210 | |
211 | return 0; |
212 | |
213 | release_lock: |
214 | snd_ff_stream_lock_release(ff); |
215 | return err; |
216 | } |
217 | |
218 | static int pcm_close(struct snd_pcm_substream *substream) |
219 | { |
220 | struct snd_ff *ff = substream->private_data; |
221 | |
222 | snd_ff_stream_lock_release(ff); |
223 | |
224 | return 0; |
225 | } |
226 | |
227 | static int pcm_hw_params(struct snd_pcm_substream *substream, |
228 | struct snd_pcm_hw_params *hw_params) |
229 | { |
230 | struct snd_ff *ff = substream->private_data; |
231 | int err = 0; |
232 | |
233 | if (substream->runtime->state == SNDRV_PCM_STATE_OPEN) { |
234 | unsigned int rate = params_rate(p: hw_params); |
235 | unsigned int frames_per_period = params_period_size(p: hw_params); |
236 | unsigned int frames_per_buffer = params_buffer_size(p: hw_params); |
237 | |
238 | mutex_lock(&ff->mutex); |
239 | err = snd_ff_stream_reserve_duplex(ff, rate, frames_per_period, |
240 | frames_per_buffer); |
241 | if (err >= 0) |
242 | ++ff->substreams_counter; |
243 | mutex_unlock(lock: &ff->mutex); |
244 | } |
245 | |
246 | return err; |
247 | } |
248 | |
249 | static int pcm_hw_free(struct snd_pcm_substream *substream) |
250 | { |
251 | struct snd_ff *ff = substream->private_data; |
252 | |
253 | mutex_lock(&ff->mutex); |
254 | |
255 | if (substream->runtime->state != SNDRV_PCM_STATE_OPEN) |
256 | --ff->substreams_counter; |
257 | |
258 | snd_ff_stream_stop_duplex(ff); |
259 | |
260 | mutex_unlock(lock: &ff->mutex); |
261 | |
262 | return 0; |
263 | } |
264 | |
265 | static int pcm_capture_prepare(struct snd_pcm_substream *substream) |
266 | { |
267 | struct snd_ff *ff = substream->private_data; |
268 | struct snd_pcm_runtime *runtime = substream->runtime; |
269 | int err; |
270 | |
271 | mutex_lock(&ff->mutex); |
272 | |
273 | err = snd_ff_stream_start_duplex(ff, rate: runtime->rate); |
274 | if (err >= 0) |
275 | amdtp_stream_pcm_prepare(s: &ff->tx_stream); |
276 | |
277 | mutex_unlock(lock: &ff->mutex); |
278 | |
279 | return err; |
280 | } |
281 | |
282 | static int pcm_playback_prepare(struct snd_pcm_substream *substream) |
283 | { |
284 | struct snd_ff *ff = substream->private_data; |
285 | struct snd_pcm_runtime *runtime = substream->runtime; |
286 | int err; |
287 | |
288 | mutex_lock(&ff->mutex); |
289 | |
290 | err = snd_ff_stream_start_duplex(ff, rate: runtime->rate); |
291 | if (err >= 0) |
292 | amdtp_stream_pcm_prepare(s: &ff->rx_stream); |
293 | |
294 | mutex_unlock(lock: &ff->mutex); |
295 | |
296 | return err; |
297 | } |
298 | |
299 | static int pcm_capture_trigger(struct snd_pcm_substream *substream, int cmd) |
300 | { |
301 | struct snd_ff *ff = substream->private_data; |
302 | |
303 | switch (cmd) { |
304 | case SNDRV_PCM_TRIGGER_START: |
305 | amdtp_stream_pcm_trigger(s: &ff->tx_stream, pcm: substream); |
306 | break; |
307 | case SNDRV_PCM_TRIGGER_STOP: |
308 | amdtp_stream_pcm_trigger(s: &ff->tx_stream, NULL); |
309 | break; |
310 | default: |
311 | return -EINVAL; |
312 | } |
313 | |
314 | return 0; |
315 | } |
316 | |
317 | static int pcm_playback_trigger(struct snd_pcm_substream *substream, int cmd) |
318 | { |
319 | struct snd_ff *ff = substream->private_data; |
320 | |
321 | switch (cmd) { |
322 | case SNDRV_PCM_TRIGGER_START: |
323 | amdtp_stream_pcm_trigger(s: &ff->rx_stream, pcm: substream); |
324 | break; |
325 | case SNDRV_PCM_TRIGGER_STOP: |
326 | amdtp_stream_pcm_trigger(s: &ff->rx_stream, NULL); |
327 | break; |
328 | default: |
329 | return -EINVAL; |
330 | } |
331 | |
332 | return 0; |
333 | } |
334 | |
335 | static snd_pcm_uframes_t pcm_capture_pointer(struct snd_pcm_substream *sbstrm) |
336 | { |
337 | struct snd_ff *ff = sbstrm->private_data; |
338 | |
339 | return amdtp_domain_stream_pcm_pointer(d: &ff->domain, s: &ff->tx_stream); |
340 | } |
341 | |
342 | static snd_pcm_uframes_t pcm_playback_pointer(struct snd_pcm_substream *sbstrm) |
343 | { |
344 | struct snd_ff *ff = sbstrm->private_data; |
345 | |
346 | return amdtp_domain_stream_pcm_pointer(d: &ff->domain, s: &ff->rx_stream); |
347 | } |
348 | |
349 | static int pcm_capture_ack(struct snd_pcm_substream *substream) |
350 | { |
351 | struct snd_ff *ff = substream->private_data; |
352 | |
353 | return amdtp_domain_stream_pcm_ack(d: &ff->domain, s: &ff->tx_stream); |
354 | } |
355 | |
356 | static int pcm_playback_ack(struct snd_pcm_substream *substream) |
357 | { |
358 | struct snd_ff *ff = substream->private_data; |
359 | |
360 | return amdtp_domain_stream_pcm_ack(d: &ff->domain, s: &ff->rx_stream); |
361 | } |
362 | |
363 | int snd_ff_create_pcm_devices(struct snd_ff *ff) |
364 | { |
365 | static const struct snd_pcm_ops pcm_capture_ops = { |
366 | .open = pcm_open, |
367 | .close = pcm_close, |
368 | .hw_params = pcm_hw_params, |
369 | .hw_free = pcm_hw_free, |
370 | .prepare = pcm_capture_prepare, |
371 | .trigger = pcm_capture_trigger, |
372 | .pointer = pcm_capture_pointer, |
373 | .ack = pcm_capture_ack, |
374 | }; |
375 | static const struct snd_pcm_ops pcm_playback_ops = { |
376 | .open = pcm_open, |
377 | .close = pcm_close, |
378 | .hw_params = pcm_hw_params, |
379 | .hw_free = pcm_hw_free, |
380 | .prepare = pcm_playback_prepare, |
381 | .trigger = pcm_playback_trigger, |
382 | .pointer = pcm_playback_pointer, |
383 | .ack = pcm_playback_ack, |
384 | }; |
385 | struct snd_pcm *pcm; |
386 | int err; |
387 | |
388 | err = snd_pcm_new(card: ff->card, id: ff->card->driver, device: 0, playback_count: 1, capture_count: 1, rpcm: &pcm); |
389 | if (err < 0) |
390 | return err; |
391 | |
392 | pcm->private_data = ff; |
393 | snprintf(buf: pcm->name, size: sizeof(pcm->name), |
394 | fmt: "%s PCM" , ff->card->shortname); |
395 | snd_pcm_set_ops(pcm, direction: SNDRV_PCM_STREAM_PLAYBACK, ops: &pcm_playback_ops); |
396 | snd_pcm_set_ops(pcm, direction: SNDRV_PCM_STREAM_CAPTURE, ops: &pcm_capture_ops); |
397 | snd_pcm_set_managed_buffer_all(pcm, SNDRV_DMA_TYPE_VMALLOC, NULL, size: 0, max: 0); |
398 | |
399 | return 0; |
400 | } |
401 | |