修改4g拨号为QMI,需要在系统里后台执行quectel-CM

hc

2024-10-22 8ac6c7a54ed1b98d142dce24b11c6de6a1e239a5

 kernel/sound/firewire/bebob/bebob_pcm.c
..
..
@@ -1,9 +1,8 @@
1
+// SPDX-License-Identifier: GPL-2.0-only
1
2
 /*
2
3
  * bebob_pcm.c - a part of driver for BeBoB based devices
3
4
  *
4
5
  * Copyright (c) 2013-2014 Takashi Sakamoto
5
- *
6
- * Licensed under the terms of the GNU General Public License, version 2.
7
6
  */
8
7
 
9
8
 #include "./bebob.h"
..
..
@@ -130,18 +129,17 @@
130
129
 	return err;
131
130
 }
132
131
 
133
-static int
134
-pcm_open(struct snd_pcm_substream *substream)
132
+static int pcm_open(struct snd_pcm_substream *substream)
135
133
 {
136
134
 	struct snd_bebob *bebob = substream->private_data;
137
135
 	const struct snd_bebob_rate_spec *spec = bebob->spec->rate;
138
-	unsigned int sampling_rate;
136
+	struct amdtp_domain *d = &bebob->domain;
139
137
 	enum snd_bebob_clock_type src;
140
138
 	int err;
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139
 
142
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 	err = snd_bebob_stream_lock_try(bebob);
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141
 	if (err < 0)
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-		goto end;
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+		return err;
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143
 
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 	err = pcm_init_hw_params(bebob, substream);
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145
 	if (err < 0)
..
..
@@ -151,15 +149,20 @@
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 	if (err < 0)
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 		goto err_locked;
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151
 
154
-	/*
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-	 * When source of clock is internal or any PCM stream are running,
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-	 * the available sampling rate is limited at current sampling rate.
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-	 */
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+	mutex_lock(&bebob->mutex);
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+
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+	// When source of clock is not internal or any stream is reserved for
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+	// transmission of PCM frames, the available sampling rate is limited
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+	// at current one.
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 	if (src == SND_BEBOB_CLOCK_TYPE_EXTERNAL ||
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-	    amdtp_stream_pcm_running(&bebob->tx_stream) ||
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-	    amdtp_stream_pcm_running(&bebob->rx_stream)) {
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+	    (bebob->substreams_counter > 0 && d->events_per_period > 0)) {
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+		unsigned int frames_per_period = d->events_per_period;
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+		unsigned int frames_per_buffer = d->events_per_buffer;
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+		unsigned int sampling_rate;
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+
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 		err = spec->get(bebob, &sampling_rate);
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 		if (err < 0) {
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+			mutex_unlock(&bebob->mutex);
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 			dev_err(&bebob->unit->device,
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 				"fail to get sampling rate: %d\n", err);
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 			goto err_locked;
..
..
@@ -167,11 +170,31 @@
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170
 
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 		substream->runtime->hw.rate_min = sampling_rate;
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 		substream->runtime->hw.rate_max = sampling_rate;
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+
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+		if (frames_per_period > 0) {
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+			err = snd_pcm_hw_constraint_minmax(substream->runtime,
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+					SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
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+					frames_per_period, frames_per_period);
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+			if (err < 0) {
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+				mutex_unlock(&bebob->mutex);
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+				goto err_locked;
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+			}
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+
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+			err = snd_pcm_hw_constraint_minmax(substream->runtime,
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+					SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
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+					frames_per_buffer, frames_per_buffer);
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+			if (err < 0) {
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+				mutex_unlock(&bebob->mutex);
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+				goto err_locked;
189
+			}
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+		}
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191
 	}
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192
 
193
+	mutex_unlock(&bebob->mutex);
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+
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 	snd_pcm_set_sync(substream);
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-end:
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-	return err;
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+
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+	return 0;
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 err_locked:
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 	snd_bebob_stream_lock_release(bebob);
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 	return err;
..
..
@@ -185,86 +208,51 @@
185
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 	return 0;
186
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 }
187
210
 
188
-static int
189
-pcm_capture_hw_params(struct snd_pcm_substream *substream,
190
-		      struct snd_pcm_hw_params *hw_params)
211
+static int pcm_hw_params(struct snd_pcm_substream *substream,
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+			 struct snd_pcm_hw_params *hw_params)
191
213
 {
192
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 	struct snd_bebob *bebob = substream->private_data;
193
-	int err;
194
-
195
-	err = snd_pcm_lib_alloc_vmalloc_buffer(substream,
196
-					       params_buffer_bytes(hw_params));
197
-	if (err < 0)
198
-		return err;
215
+	int err = 0;
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216
 
200
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 	if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN) {
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+		unsigned int rate = params_rate(hw_params);
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+		unsigned int frames_per_period = params_period_size(hw_params);
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+		unsigned int frames_per_buffer = params_buffer_size(hw_params);
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+
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 		mutex_lock(&bebob->mutex);
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-		bebob->substreams_counter++;
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+		err = snd_bebob_stream_reserve_duplex(bebob, rate,
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+					frames_per_period, frames_per_buffer);
225
+		if (err >= 0)
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+			++bebob->substreams_counter;
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227
 		mutex_unlock(&bebob->mutex);
204
228
 	}
205
229
 
206
-	return 0;
207
-}
208
-static int
209
-pcm_playback_hw_params(struct snd_pcm_substream *substream,
210
-		       struct snd_pcm_hw_params *hw_params)
211
-{
212
-	struct snd_bebob *bebob = substream->private_data;
213
-	int err;
214
-
215
-	err = snd_pcm_lib_alloc_vmalloc_buffer(substream,
216
-					       params_buffer_bytes(hw_params));
217
-	if (err < 0)
218
-		return err;
219
-
220
-	if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN) {
221
-		mutex_lock(&bebob->mutex);
222
-		bebob->substreams_counter++;
223
-		mutex_unlock(&bebob->mutex);
224
-	}
225
-
226
-	return 0;
230
+	return err;
227
231
 }
228
232
 
229
-static int
230
-pcm_capture_hw_free(struct snd_pcm_substream *substream)
233
+static int pcm_hw_free(struct snd_pcm_substream *substream)
231
234
 {
232
235
 	struct snd_bebob *bebob = substream->private_data;
233
236
 
234
-	if (substream->runtime->status->state != SNDRV_PCM_STATE_OPEN) {
235
-		mutex_lock(&bebob->mutex);
237
+	mutex_lock(&bebob->mutex);
238
+
239
+	if (substream->runtime->status->state != SNDRV_PCM_STATE_OPEN)
236
240
 		bebob->substreams_counter--;
237
-		mutex_unlock(&bebob->mutex);
238
-	}
239
241
 
240
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 	snd_bebob_stream_stop_duplex(bebob);
241
243
 
242
-	return snd_pcm_lib_free_vmalloc_buffer(substream);
243
-}
244
-static int
245
-pcm_playback_hw_free(struct snd_pcm_substream *substream)
246
-{
247
-	struct snd_bebob *bebob = substream->private_data;
244
+	mutex_unlock(&bebob->mutex);
248
245
 
249
-	if (substream->runtime->status->state != SNDRV_PCM_STATE_OPEN) {
250
-		mutex_lock(&bebob->mutex);
251
-		bebob->substreams_counter--;
252
-		mutex_unlock(&bebob->mutex);
253
-	}
254
-
255
-	snd_bebob_stream_stop_duplex(bebob);
256
-
257
-	return snd_pcm_lib_free_vmalloc_buffer(substream);
246
+	return 0;
258
247
 }
259
248
 
260
249
 static int
261
250
 pcm_capture_prepare(struct snd_pcm_substream *substream)
262
251
 {
263
252
 	struct snd_bebob *bebob = substream->private_data;
264
-	struct snd_pcm_runtime *runtime = substream->runtime;
265
253
 	int err;
266
254
 
267
-	err = snd_bebob_stream_start_duplex(bebob, runtime->rate);
255
+	err = snd_bebob_stream_start_duplex(bebob);
268
256
 	if (err >= 0)
269
257
 		amdtp_stream_pcm_prepare(&bebob->tx_stream);
270
258
 
..
..
@@ -274,10 +262,9 @@
274
262
 pcm_playback_prepare(struct snd_pcm_substream *substream)
275
263
 {
276
264
 	struct snd_bebob *bebob = substream->private_data;
277
-	struct snd_pcm_runtime *runtime = substream->runtime;
278
265
 	int err;
279
266
 
280
-	err = snd_bebob_stream_start_duplex(bebob, runtime->rate);
267
+	err = snd_bebob_stream_start_duplex(bebob);
281
268
 	if (err >= 0)
282
269
 		amdtp_stream_pcm_prepare(&bebob->rx_stream);
283
270
 
..
..
@@ -321,31 +308,33 @@
321
308
 	return 0;
322
309
 }
323
310
 
324
-static snd_pcm_uframes_t
325
-pcm_capture_pointer(struct snd_pcm_substream *sbstrm)
311
+static snd_pcm_uframes_t pcm_capture_pointer(struct snd_pcm_substream *sbstrm)
326
312
 {
327
313
 	struct snd_bebob *bebob = sbstrm->private_data;
328
-	return amdtp_stream_pcm_pointer(&bebob->tx_stream);
314
+
315
+	return amdtp_domain_stream_pcm_pointer(&bebob->domain,
316
+					       &bebob->tx_stream);
329
317
 }
330
-static snd_pcm_uframes_t
331
-pcm_playback_pointer(struct snd_pcm_substream *sbstrm)
318
+static snd_pcm_uframes_t pcm_playback_pointer(struct snd_pcm_substream *sbstrm)
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319
 {
333
320
 	struct snd_bebob *bebob = sbstrm->private_data;
334
-	return amdtp_stream_pcm_pointer(&bebob->rx_stream);
321
+
322
+	return amdtp_domain_stream_pcm_pointer(&bebob->domain,
323
+					       &bebob->rx_stream);
335
324
 }
336
325
 
337
326
 static int pcm_capture_ack(struct snd_pcm_substream *substream)
338
327
 {
339
328
 	struct snd_bebob *bebob = substream->private_data;
340
329
 
341
-	return amdtp_stream_pcm_ack(&bebob->tx_stream);
330
+	return amdtp_domain_stream_pcm_ack(&bebob->domain, &bebob->tx_stream);
342
331
 }
343
332
 
344
333
 static int pcm_playback_ack(struct snd_pcm_substream *substream)
345
334
 {
346
335
 	struct snd_bebob *bebob = substream->private_data;
347
336
 
348
-	return amdtp_stream_pcm_ack(&bebob->rx_stream);
337
+	return amdtp_domain_stream_pcm_ack(&bebob->domain, &bebob->rx_stream);
349
338
 }
350
339
 
351
340
 int snd_bebob_create_pcm_devices(struct snd_bebob *bebob)
..
..
@@ -353,26 +342,22 @@
353
342
 	static const struct snd_pcm_ops capture_ops = {
354
343
 		.open		= pcm_open,
355
344
 		.close		= pcm_close,
356
-		.ioctl		= snd_pcm_lib_ioctl,
357
-		.hw_params	= pcm_capture_hw_params,
358
-		.hw_free	= pcm_capture_hw_free,
345
+		.hw_params	= pcm_hw_params,
346
+		.hw_free	= pcm_hw_free,
359
347
 		.prepare	= pcm_capture_prepare,
360
348
 		.trigger	= pcm_capture_trigger,
361
349
 		.pointer	= pcm_capture_pointer,
362
350
 		.ack		= pcm_capture_ack,
363
-		.page		= snd_pcm_lib_get_vmalloc_page,
364
351
 	};
365
352
 	static const struct snd_pcm_ops playback_ops = {
366
353
 		.open		= pcm_open,
367
354
 		.close		= pcm_close,
368
-		.ioctl		= snd_pcm_lib_ioctl,
369
-		.hw_params	= pcm_playback_hw_params,
370
-		.hw_free	= pcm_playback_hw_free,
355
+		.hw_params	= pcm_hw_params,
356
+		.hw_free	= pcm_hw_free,
371
357
 		.prepare	= pcm_playback_prepare,
372
358
 		.trigger	= pcm_playback_trigger,
373
359
 		.pointer	= pcm_playback_pointer,
374
360
 		.ack		= pcm_playback_ack,
375
-		.page		= snd_pcm_lib_get_vmalloc_page,
376
361
 	};
377
362
 	struct snd_pcm *pcm;
378
363
 	int err;
..
..
@@ -386,6 +371,7 @@
386
371
 		 "%s PCM", bebob->card->shortname);
387
372
 	snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &playback_ops);
388
373
 	snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &capture_ops);
374
+	snd_pcm_set_managed_buffer_all(pcm, SNDRV_DMA_TYPE_VMALLOC, NULL, 0, 0);
389
375
 end:
390
376
 	return err;
391
377
 }