This source file includes following definitions.
- hw_rule_rate
- hw_rule_channels
- limit_channels_and_rates
- pcm_init_hw_params
- pcm_open
- pcm_close
- pcm_hw_params
- pcm_hw_free
- pcm_capture_prepare
- pcm_playback_prepare
- pcm_capture_trigger
- pcm_playback_trigger
- pcm_capture_pointer
- pcm_playback_pointer
- pcm_capture_ack
- pcm_playback_ack
- snd_ff_create_pcm_devices
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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(i, &mode);
28 if (err < 0)
29 continue;
30
31 if (!snd_interval_test(c, 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(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 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(i, &mode);
59 if (err < 0)
60 continue;
61
62 if (!snd_interval_test(r, 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(c, &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(i, &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(&runtime->hw, pcm_channels);
123
124 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS,
125 hw_rule_channels, (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, 0, SNDRV_PCM_HW_PARAM_RATE,
131 hw_rule_rate, (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 unsigned int rate;
143 enum snd_ff_clock_src src;
144 int i, err;
145
146 err = snd_ff_stream_lock_try(ff);
147 if (err < 0)
148 return err;
149
150 err = pcm_init_hw_params(ff, substream);
151 if (err < 0)
152 goto release_lock;
153
154 err = ff->spec->protocol->get_clock(ff, &rate, &src);
155 if (err < 0)
156 goto release_lock;
157
158 if (src != SND_FF_CLOCK_SRC_INTERNAL) {
159 for (i = 0; i < CIP_SFC_COUNT; ++i) {
160 if (amdtp_rate_table[i] == rate)
161 break;
162 }
163
164
165
166
167 if (i >= CIP_SFC_COUNT) {
168 err = -EIO;
169 goto release_lock;
170 }
171
172 substream->runtime->hw.rate_min = rate;
173 substream->runtime->hw.rate_max = rate;
174 } else {
175 if (amdtp_stream_pcm_running(&ff->rx_stream) ||
176 amdtp_stream_pcm_running(&ff->tx_stream)) {
177 rate = amdtp_rate_table[ff->rx_stream.sfc];
178 substream->runtime->hw.rate_min = rate;
179 substream->runtime->hw.rate_max = rate;
180 }
181 }
182
183 snd_pcm_set_sync(substream);
184
185 return 0;
186
187 release_lock:
188 snd_ff_stream_lock_release(ff);
189 return err;
190 }
191
192 static int pcm_close(struct snd_pcm_substream *substream)
193 {
194 struct snd_ff *ff = substream->private_data;
195
196 snd_ff_stream_lock_release(ff);
197
198 return 0;
199 }
200
201 static int pcm_hw_params(struct snd_pcm_substream *substream,
202 struct snd_pcm_hw_params *hw_params)
203 {
204 struct snd_ff *ff = substream->private_data;
205 int err;
206
207 err = snd_pcm_lib_alloc_vmalloc_buffer(substream,
208 params_buffer_bytes(hw_params));
209 if (err < 0)
210 return err;
211
212 if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN) {
213 unsigned int rate = params_rate(hw_params);
214
215 mutex_lock(&ff->mutex);
216 err = snd_ff_stream_reserve_duplex(ff, rate);
217 if (err >= 0)
218 ++ff->substreams_counter;
219 mutex_unlock(&ff->mutex);
220 }
221
222 return err;
223 }
224
225 static int pcm_hw_free(struct snd_pcm_substream *substream)
226 {
227 struct snd_ff *ff = substream->private_data;
228
229 mutex_lock(&ff->mutex);
230
231 if (substream->runtime->status->state != SNDRV_PCM_STATE_OPEN)
232 --ff->substreams_counter;
233
234 snd_ff_stream_stop_duplex(ff);
235
236 mutex_unlock(&ff->mutex);
237
238 return snd_pcm_lib_free_vmalloc_buffer(substream);
239 }
240
241 static int pcm_capture_prepare(struct snd_pcm_substream *substream)
242 {
243 struct snd_ff *ff = substream->private_data;
244 struct snd_pcm_runtime *runtime = substream->runtime;
245 int err;
246
247 mutex_lock(&ff->mutex);
248
249 err = snd_ff_stream_start_duplex(ff, runtime->rate);
250 if (err >= 0)
251 amdtp_stream_pcm_prepare(&ff->tx_stream);
252
253 mutex_unlock(&ff->mutex);
254
255 return err;
256 }
257
258 static int pcm_playback_prepare(struct snd_pcm_substream *substream)
259 {
260 struct snd_ff *ff = substream->private_data;
261 struct snd_pcm_runtime *runtime = substream->runtime;
262 int err;
263
264 mutex_lock(&ff->mutex);
265
266 err = snd_ff_stream_start_duplex(ff, runtime->rate);
267 if (err >= 0)
268 amdtp_stream_pcm_prepare(&ff->rx_stream);
269
270 mutex_unlock(&ff->mutex);
271
272 return err;
273 }
274
275 static int pcm_capture_trigger(struct snd_pcm_substream *substream, int cmd)
276 {
277 struct snd_ff *ff = substream->private_data;
278
279 switch (cmd) {
280 case SNDRV_PCM_TRIGGER_START:
281 amdtp_stream_pcm_trigger(&ff->tx_stream, substream);
282 break;
283 case SNDRV_PCM_TRIGGER_STOP:
284 amdtp_stream_pcm_trigger(&ff->tx_stream, NULL);
285 break;
286 default:
287 return -EINVAL;
288 }
289
290 return 0;
291 }
292
293 static int pcm_playback_trigger(struct snd_pcm_substream *substream, int cmd)
294 {
295 struct snd_ff *ff = substream->private_data;
296
297 switch (cmd) {
298 case SNDRV_PCM_TRIGGER_START:
299 amdtp_stream_pcm_trigger(&ff->rx_stream, substream);
300 break;
301 case SNDRV_PCM_TRIGGER_STOP:
302 amdtp_stream_pcm_trigger(&ff->rx_stream, NULL);
303 break;
304 default:
305 return -EINVAL;
306 }
307
308 return 0;
309 }
310
311 static snd_pcm_uframes_t pcm_capture_pointer(struct snd_pcm_substream *sbstrm)
312 {
313 struct snd_ff *ff = sbstrm->private_data;
314
315 return amdtp_stream_pcm_pointer(&ff->tx_stream);
316 }
317
318 static snd_pcm_uframes_t pcm_playback_pointer(struct snd_pcm_substream *sbstrm)
319 {
320 struct snd_ff *ff = sbstrm->private_data;
321
322 return amdtp_stream_pcm_pointer(&ff->rx_stream);
323 }
324
325 static int pcm_capture_ack(struct snd_pcm_substream *substream)
326 {
327 struct snd_ff *ff = substream->private_data;
328
329 return amdtp_stream_pcm_ack(&ff->tx_stream);
330 }
331
332 static int pcm_playback_ack(struct snd_pcm_substream *substream)
333 {
334 struct snd_ff *ff = substream->private_data;
335
336 return amdtp_stream_pcm_ack(&ff->rx_stream);
337 }
338
339 int snd_ff_create_pcm_devices(struct snd_ff *ff)
340 {
341 static const struct snd_pcm_ops pcm_capture_ops = {
342 .open = pcm_open,
343 .close = pcm_close,
344 .ioctl = snd_pcm_lib_ioctl,
345 .hw_params = pcm_hw_params,
346 .hw_free = pcm_hw_free,
347 .prepare = pcm_capture_prepare,
348 .trigger = pcm_capture_trigger,
349 .pointer = pcm_capture_pointer,
350 .ack = pcm_capture_ack,
351 .page = snd_pcm_lib_get_vmalloc_page,
352 };
353 static const struct snd_pcm_ops pcm_playback_ops = {
354 .open = pcm_open,
355 .close = pcm_close,
356 .ioctl = snd_pcm_lib_ioctl,
357 .hw_params = pcm_hw_params,
358 .hw_free = pcm_hw_free,
359 .prepare = pcm_playback_prepare,
360 .trigger = pcm_playback_trigger,
361 .pointer = pcm_playback_pointer,
362 .ack = pcm_playback_ack,
363 .page = snd_pcm_lib_get_vmalloc_page,
364 };
365 struct snd_pcm *pcm;
366 int err;
367
368 err = snd_pcm_new(ff->card, ff->card->driver, 0, 1, 1, &pcm);
369 if (err < 0)
370 return err;
371
372 pcm->private_data = ff;
373 snprintf(pcm->name, sizeof(pcm->name),
374 "%s PCM", ff->card->shortname);
375 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &pcm_playback_ops);
376 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &pcm_capture_ops);
377
378 return 0;
379 }