This source file includes following definitions.
- hw_rule_rate
- hw_rule_channels
- 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_dg00x_create_pcm_devices
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8 #include "digi00x.h"
9
10 static int hw_rule_rate(struct snd_pcm_hw_params *params,
11 struct snd_pcm_hw_rule *rule)
12 {
13 struct snd_interval *r =
14 hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE);
15 const struct snd_interval *c =
16 hw_param_interval_c(params, SNDRV_PCM_HW_PARAM_CHANNELS);
17 struct snd_interval t = {
18 .min = UINT_MAX, .max = 0, .integer = 1,
19 };
20 unsigned int i;
21
22 for (i = 0; i < SND_DG00X_RATE_COUNT; i++) {
23 if (!snd_interval_test(c,
24 snd_dg00x_stream_pcm_channels[i]))
25 continue;
26
27 t.min = min(t.min, snd_dg00x_stream_rates[i]);
28 t.max = max(t.max, snd_dg00x_stream_rates[i]);
29 }
30
31 return snd_interval_refine(r, &t);
32 }
33
34 static int hw_rule_channels(struct snd_pcm_hw_params *params,
35 struct snd_pcm_hw_rule *rule)
36 {
37 struct snd_interval *c =
38 hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS);
39 const struct snd_interval *r =
40 hw_param_interval_c(params, SNDRV_PCM_HW_PARAM_RATE);
41 struct snd_interval t = {
42 .min = UINT_MAX, .max = 0, .integer = 1,
43 };
44 unsigned int i;
45
46 for (i = 0; i < SND_DG00X_RATE_COUNT; i++) {
47 if (!snd_interval_test(r, snd_dg00x_stream_rates[i]))
48 continue;
49
50 t.min = min(t.min, snd_dg00x_stream_pcm_channels[i]);
51 t.max = max(t.max, snd_dg00x_stream_pcm_channels[i]);
52 }
53
54 return snd_interval_refine(c, &t);
55 }
56
57 static int pcm_init_hw_params(struct snd_dg00x *dg00x,
58 struct snd_pcm_substream *substream)
59 {
60 struct snd_pcm_runtime *runtime = substream->runtime;
61 struct snd_pcm_hardware *hw = &runtime->hw;
62 struct amdtp_stream *s;
63 int err;
64
65
66 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) {
67 substream->runtime->hw.formats = SNDRV_PCM_FMTBIT_S32;
68 s = &dg00x->tx_stream;
69 } else {
70 substream->runtime->hw.formats = SNDRV_PCM_FMTBIT_S32;
71 s = &dg00x->rx_stream;
72 }
73
74 hw->channels_min = 10;
75 hw->channels_max = 18;
76
77 hw->rates = SNDRV_PCM_RATE_44100 |
78 SNDRV_PCM_RATE_48000 |
79 SNDRV_PCM_RATE_88200 |
80 SNDRV_PCM_RATE_96000;
81 snd_pcm_limit_hw_rates(runtime);
82
83 err = snd_pcm_hw_rule_add(substream->runtime, 0,
84 SNDRV_PCM_HW_PARAM_CHANNELS,
85 hw_rule_channels, NULL,
86 SNDRV_PCM_HW_PARAM_RATE, -1);
87 if (err < 0)
88 return err;
89
90 err = snd_pcm_hw_rule_add(substream->runtime, 0,
91 SNDRV_PCM_HW_PARAM_RATE,
92 hw_rule_rate, NULL,
93 SNDRV_PCM_HW_PARAM_CHANNELS, -1);
94 if (err < 0)
95 return err;
96
97 return amdtp_dot_add_pcm_hw_constraints(s, substream->runtime);
98 }
99
100 static int pcm_open(struct snd_pcm_substream *substream)
101 {
102 struct snd_dg00x *dg00x = substream->private_data;
103 enum snd_dg00x_clock clock;
104 bool detect;
105 unsigned int rate;
106 int err;
107
108 err = snd_dg00x_stream_lock_try(dg00x);
109 if (err < 0)
110 goto end;
111
112 err = pcm_init_hw_params(dg00x, substream);
113 if (err < 0)
114 goto err_locked;
115
116
117 err = snd_dg00x_stream_get_clock(dg00x, &clock);
118 if (err < 0)
119 goto err_locked;
120 if (clock != SND_DG00X_CLOCK_INTERNAL) {
121 err = snd_dg00x_stream_check_external_clock(dg00x, &detect);
122 if (err < 0)
123 goto err_locked;
124 if (!detect) {
125 err = -EBUSY;
126 goto err_locked;
127 }
128 }
129
130 if ((clock != SND_DG00X_CLOCK_INTERNAL) ||
131 amdtp_stream_pcm_running(&dg00x->rx_stream) ||
132 amdtp_stream_pcm_running(&dg00x->tx_stream)) {
133 err = snd_dg00x_stream_get_external_rate(dg00x, &rate);
134 if (err < 0)
135 goto err_locked;
136 substream->runtime->hw.rate_min = rate;
137 substream->runtime->hw.rate_max = rate;
138 }
139
140 snd_pcm_set_sync(substream);
141 end:
142 return err;
143 err_locked:
144 snd_dg00x_stream_lock_release(dg00x);
145 return err;
146 }
147
148 static int pcm_close(struct snd_pcm_substream *substream)
149 {
150 struct snd_dg00x *dg00x = substream->private_data;
151
152 snd_dg00x_stream_lock_release(dg00x);
153
154 return 0;
155 }
156
157 static int pcm_hw_params(struct snd_pcm_substream *substream,
158 struct snd_pcm_hw_params *hw_params)
159 {
160 struct snd_dg00x *dg00x = substream->private_data;
161 int err;
162
163 err = snd_pcm_lib_alloc_vmalloc_buffer(substream,
164 params_buffer_bytes(hw_params));
165 if (err < 0)
166 return err;
167
168 if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN) {
169 unsigned int rate = params_rate(hw_params);
170
171 mutex_lock(&dg00x->mutex);
172 err = snd_dg00x_stream_reserve_duplex(dg00x, rate);
173 if (err >= 0)
174 ++dg00x->substreams_counter;
175 mutex_unlock(&dg00x->mutex);
176 }
177
178 return err;
179 }
180
181 static int pcm_hw_free(struct snd_pcm_substream *substream)
182 {
183 struct snd_dg00x *dg00x = substream->private_data;
184
185 mutex_lock(&dg00x->mutex);
186
187 if (substream->runtime->status->state != SNDRV_PCM_STATE_OPEN)
188 --dg00x->substreams_counter;
189
190 snd_dg00x_stream_stop_duplex(dg00x);
191
192 mutex_unlock(&dg00x->mutex);
193
194 return snd_pcm_lib_free_vmalloc_buffer(substream);
195 }
196
197 static int pcm_capture_prepare(struct snd_pcm_substream *substream)
198 {
199 struct snd_dg00x *dg00x = substream->private_data;
200 int err;
201
202 mutex_lock(&dg00x->mutex);
203
204 err = snd_dg00x_stream_start_duplex(dg00x);
205 if (err >= 0)
206 amdtp_stream_pcm_prepare(&dg00x->tx_stream);
207
208 mutex_unlock(&dg00x->mutex);
209
210 return err;
211 }
212
213 static int pcm_playback_prepare(struct snd_pcm_substream *substream)
214 {
215 struct snd_dg00x *dg00x = substream->private_data;
216 int err;
217
218 mutex_lock(&dg00x->mutex);
219
220 err = snd_dg00x_stream_start_duplex(dg00x);
221 if (err >= 0) {
222 amdtp_stream_pcm_prepare(&dg00x->rx_stream);
223 amdtp_dot_reset(&dg00x->rx_stream);
224 }
225
226 mutex_unlock(&dg00x->mutex);
227
228 return err;
229 }
230
231 static int pcm_capture_trigger(struct snd_pcm_substream *substream, int cmd)
232 {
233 struct snd_dg00x *dg00x = substream->private_data;
234
235 switch (cmd) {
236 case SNDRV_PCM_TRIGGER_START:
237 amdtp_stream_pcm_trigger(&dg00x->tx_stream, substream);
238 break;
239 case SNDRV_PCM_TRIGGER_STOP:
240 amdtp_stream_pcm_trigger(&dg00x->tx_stream, NULL);
241 break;
242 default:
243 return -EINVAL;
244 }
245
246 return 0;
247 }
248
249 static int pcm_playback_trigger(struct snd_pcm_substream *substream, int cmd)
250 {
251 struct snd_dg00x *dg00x = substream->private_data;
252
253 switch (cmd) {
254 case SNDRV_PCM_TRIGGER_START:
255 amdtp_stream_pcm_trigger(&dg00x->rx_stream, substream);
256 break;
257 case SNDRV_PCM_TRIGGER_STOP:
258 amdtp_stream_pcm_trigger(&dg00x->rx_stream, NULL);
259 break;
260 default:
261 return -EINVAL;
262 }
263
264 return 0;
265 }
266
267 static snd_pcm_uframes_t pcm_capture_pointer(struct snd_pcm_substream *sbstrm)
268 {
269 struct snd_dg00x *dg00x = sbstrm->private_data;
270
271 return amdtp_stream_pcm_pointer(&dg00x->tx_stream);
272 }
273
274 static snd_pcm_uframes_t pcm_playback_pointer(struct snd_pcm_substream *sbstrm)
275 {
276 struct snd_dg00x *dg00x = sbstrm->private_data;
277
278 return amdtp_stream_pcm_pointer(&dg00x->rx_stream);
279 }
280
281 static int pcm_capture_ack(struct snd_pcm_substream *substream)
282 {
283 struct snd_dg00x *dg00x = substream->private_data;
284
285 return amdtp_stream_pcm_ack(&dg00x->tx_stream);
286 }
287
288 static int pcm_playback_ack(struct snd_pcm_substream *substream)
289 {
290 struct snd_dg00x *dg00x = substream->private_data;
291
292 return amdtp_stream_pcm_ack(&dg00x->rx_stream);
293 }
294
295 int snd_dg00x_create_pcm_devices(struct snd_dg00x *dg00x)
296 {
297 static const struct snd_pcm_ops capture_ops = {
298 .open = pcm_open,
299 .close = pcm_close,
300 .ioctl = snd_pcm_lib_ioctl,
301 .hw_params = pcm_hw_params,
302 .hw_free = pcm_hw_free,
303 .prepare = pcm_capture_prepare,
304 .trigger = pcm_capture_trigger,
305 .pointer = pcm_capture_pointer,
306 .ack = pcm_capture_ack,
307 .page = snd_pcm_lib_get_vmalloc_page,
308 };
309 static const struct snd_pcm_ops playback_ops = {
310 .open = pcm_open,
311 .close = pcm_close,
312 .ioctl = snd_pcm_lib_ioctl,
313 .hw_params = pcm_hw_params,
314 .hw_free = pcm_hw_free,
315 .prepare = pcm_playback_prepare,
316 .trigger = pcm_playback_trigger,
317 .pointer = pcm_playback_pointer,
318 .ack = pcm_playback_ack,
319 .page = snd_pcm_lib_get_vmalloc_page,
320 };
321 struct snd_pcm *pcm;
322 int err;
323
324 err = snd_pcm_new(dg00x->card, dg00x->card->driver, 0, 1, 1, &pcm);
325 if (err < 0)
326 return err;
327
328 pcm->private_data = dg00x;
329 snprintf(pcm->name, sizeof(pcm->name),
330 "%s PCM", dg00x->card->shortname);
331 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &playback_ops);
332 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &capture_ops);
333
334 return 0;
335 }