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2024-10-22 8ac6c7a54ed1b98d142dce24b11c6de6a1e239a5 
 kernel/sound/firewire/motu/motu-pcm.c
....@@ -1,9 +1,8 @@
1
+// SPDX-License-Identifier: GPL-2.0-only
12 /*
23  * motu-pcm.c - a part of driver for MOTU FireWire series
34  *
45  * Copyright (c) 2015-2017 Takashi Sakamoto <o-takashi@sakamocchi.jp>
5
- *
6
- * Licensed under the terms of the GNU General Public License, version 2.
76  */
87 
98 #include <sound/pcm_params.h>
....@@ -27,8 +26,7 @@
2726 		rate = snd_motu_clock_rates[i];
2827 		mode = i / 2;
2928 
30
-		pcm_channels = formats->fixed_part_pcm_chunks[mode] +
31
-			       formats->differed_part_pcm_chunks[mode];
29
+		pcm_channels = formats->pcm_chunks[mode];
3230 		if (!snd_interval_test(c, pcm_channels))
3331 			continue;
3432 
....@@ -60,8 +58,7 @@
6058 		if (!snd_interval_test(r, rate))
6159 			continue;
6260 
63
-		pcm_channels = formats->fixed_part_pcm_chunks[mode] +
64
-			       formats->differed_part_pcm_chunks[mode];
61
+		pcm_channels = formats->pcm_chunks[mode];
6562 		channels.min = min(channels.min, pcm_channels);
6663 		channels.max = max(channels.max, pcm_channels);
6764 	}
....@@ -83,8 +80,7 @@
8380 		rate = snd_motu_clock_rates[i];
8481 		mode = i / 2;
8582 
86
-		pcm_channels = formats->fixed_part_pcm_chunks[mode] +
87
-			       formats->differed_part_pcm_chunks[mode];
83
+		pcm_channels = formats->pcm_chunks[mode];
8884 		if (pcm_channels == 0)
8985 			continue;
9086 
....@@ -134,9 +130,8 @@
134130 static int pcm_open(struct snd_pcm_substream *substream)
135131 {
136132 	struct snd_motu *motu = substream->private_data;
137
-	const struct snd_motu_protocol *const protocol = motu->spec->protocol;
133
+	struct amdtp_domain *d = &motu->domain;
138134 	enum snd_motu_clock_source src;
139
-	unsigned int rate;
140135 	int err;
141136 
142137 	err = snd_motu_stream_lock_try(motu);
....@@ -153,28 +148,47 @@
153148 	if (err < 0)
154149 		goto err_locked;
155150 
156
-	/*
157
-	 * When source of clock is not internal or any PCM streams are running,
158
-	 * available sampling rate is limited at current sampling rate.
159
-	 */
160
-	err = protocol->get_clock_source(motu, &src);
151
+	err = snd_motu_protocol_get_clock_source(motu, &src);
161152 	if (err < 0)
162153 		goto err_locked;
163
-	if (src != SND_MOTU_CLOCK_SOURCE_INTERNAL ||
164
-	    amdtp_stream_pcm_running(&motu->tx_stream) ||
165
-	    amdtp_stream_pcm_running(&motu->rx_stream)) {
166
-		err = protocol->get_clock_rate(motu, &rate);
154
+
155
+	// When source of clock is not internal or any stream is reserved for
156
+	// transmission of PCM frames, the available sampling rate is limited
157
+	// at current one.
158
+	if ((src != SND_MOTU_CLOCK_SOURCE_INTERNAL &&
159
+	     src != SND_MOTU_CLOCK_SOURCE_SPH) ||
160
+	    (motu->substreams_counter > 0 && d->events_per_period > 0)) {
161
+		unsigned int frames_per_period = d->events_per_period;
162
+		unsigned int frames_per_buffer = d->events_per_buffer;
163
+		unsigned int rate;
164
+
165
+		err = snd_motu_protocol_get_clock_rate(motu, &rate);
167166 		if (err < 0)
168167 			goto err_locked;
168
+
169169 		substream->runtime->hw.rate_min = rate;
170170 		substream->runtime->hw.rate_max = rate;
171
+
172
+		if (frames_per_period > 0) {
173
+			err = snd_pcm_hw_constraint_minmax(substream->runtime,
174
+					SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
175
+					frames_per_period, frames_per_period);
176
+			if (err < 0)
177
+				goto err_locked;
178
+
179
+			err = snd_pcm_hw_constraint_minmax(substream->runtime,
180
+					SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
181
+					frames_per_buffer, frames_per_buffer);
182
+			if (err < 0)
183
+				goto err_locked;
184
+		}
171185 	}
172186 
173187 	snd_pcm_set_sync(substream);
174188 
175189 	mutex_unlock(&motu->mutex);
176190 
177
-	return err;
191
+	return 0;
178192 err_locked:
179193 	mutex_unlock(&motu->mutex);
180194 	snd_motu_stream_lock_release(motu);
....@@ -190,75 +204,42 @@
190204 	return 0;
191205 }
192206 
193
-static int capture_hw_params(struct snd_pcm_substream *substream,
194
-			     struct snd_pcm_hw_params *hw_params)
207
+static int pcm_hw_params(struct snd_pcm_substream *substream,
208
+			 struct snd_pcm_hw_params *hw_params)
195209 {
196210 	struct snd_motu *motu = substream->private_data;
197
-	int err;
198
-
199
-	err = snd_pcm_lib_alloc_vmalloc_buffer(substream,
200
-					       params_buffer_bytes(hw_params));
201
-	if (err < 0)
202
-		return err;
211
+	int err = 0;
203212 
204213 	if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN) {
214
+		unsigned int rate = params_rate(hw_params);
215
+		unsigned int frames_per_period = params_period_size(hw_params);
216
+		unsigned int frames_per_buffer = params_buffer_size(hw_params);
217
+
205218 		mutex_lock(&motu->mutex);
206
-		motu->capture_substreams++;
219
+		err = snd_motu_stream_reserve_duplex(motu, rate,
220
+					frames_per_period, frames_per_buffer);
221
+		if (err >= 0)
222
+			++motu->substreams_counter;
207223 		mutex_unlock(&motu->mutex);
208224 	}
209225 
210
-	return 0;
211
-}
212
-static int playback_hw_params(struct snd_pcm_substream *substream,
213
-			      struct snd_pcm_hw_params *hw_params)
214
-{
215
-	struct snd_motu *motu = substream->private_data;
216
-	int err;
217
-
218
-	err = snd_pcm_lib_alloc_vmalloc_buffer(substream,
219
-					       params_buffer_bytes(hw_params));
220
-	if (err < 0)
221
-		return err;
222
-
223
-	if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN) {
224
-		mutex_lock(&motu->mutex);
225
-		motu->playback_substreams++;
226
-		mutex_unlock(&motu->mutex);
227
-	}
228
-
229
-	return 0;
226
+	return err;
230227 }
231228 
232
-static int capture_hw_free(struct snd_pcm_substream *substream)
229
+static int pcm_hw_free(struct snd_pcm_substream *substream)
233230 {
234231 	struct snd_motu *motu = substream->private_data;
235232 
236233 	mutex_lock(&motu->mutex);
237234 
238235 	if (substream->runtime->status->state != SNDRV_PCM_STATE_OPEN)
239
-		motu->capture_substreams--;
236
+		--motu->substreams_counter;
240237 
241238 	snd_motu_stream_stop_duplex(motu);
242239 
243240 	mutex_unlock(&motu->mutex);
244241 
245
-	return snd_pcm_lib_free_vmalloc_buffer(substream);
246
-}
247
-
248
-static int playback_hw_free(struct snd_pcm_substream *substream)
249
-{
250
-	struct snd_motu *motu = substream->private_data;
251
-
252
-	mutex_lock(&motu->mutex);
253
-
254
-	if (substream->runtime->status->state != SNDRV_PCM_STATE_OPEN)
255
-		motu->playback_substreams--;
256
-
257
-	snd_motu_stream_stop_duplex(motu);
258
-
259
-	mutex_unlock(&motu->mutex);
260
-
261
-	return snd_pcm_lib_free_vmalloc_buffer(substream);
242
+	return 0;
262243 }
263244 
264245 static int capture_prepare(struct snd_pcm_substream *substream)
....@@ -267,7 +248,7 @@
267248 	int err;
268249 
269250 	mutex_lock(&motu->mutex);
270
-	err = snd_motu_stream_start_duplex(motu, substream->runtime->rate);
251
+	err = snd_motu_stream_start_duplex(motu);
271252 	mutex_unlock(&motu->mutex);
272253 	if (err >= 0)
273254 		amdtp_stream_pcm_prepare(&motu->tx_stream);
....@@ -280,7 +261,7 @@
280261 	int err;
281262 
282263 	mutex_lock(&motu->mutex);
283
-	err = snd_motu_stream_start_duplex(motu, substream->runtime->rate);
264
+	err = snd_motu_stream_start_duplex(motu);
284265 	mutex_unlock(&motu->mutex);
285266 	if (err >= 0)
286267 		amdtp_stream_pcm_prepare(&motu->rx_stream);
....@@ -327,27 +308,27 @@
327308 {
328309 	struct snd_motu *motu = substream->private_data;
329310 
330
-	return amdtp_stream_pcm_pointer(&motu->tx_stream);
311
+	return amdtp_domain_stream_pcm_pointer(&motu->domain, &motu->tx_stream);
331312 }
332313 static snd_pcm_uframes_t playback_pointer(struct snd_pcm_substream *substream)
333314 {
334315 	struct snd_motu *motu = substream->private_data;
335316 
336
-	return amdtp_stream_pcm_pointer(&motu->rx_stream);
317
+	return amdtp_domain_stream_pcm_pointer(&motu->domain, &motu->rx_stream);
337318 }
338319 
339320 static int capture_ack(struct snd_pcm_substream *substream)
340321 {
341322 	struct snd_motu *motu = substream->private_data;
342323 
343
-	return amdtp_stream_pcm_ack(&motu->tx_stream);
324
+	return amdtp_domain_stream_pcm_ack(&motu->domain, &motu->tx_stream);
344325 }
345326 
346327 static int playback_ack(struct snd_pcm_substream *substream)
347328 {
348329 	struct snd_motu *motu = substream->private_data;
349330 
350
-	return amdtp_stream_pcm_ack(&motu->rx_stream);
331
+	return amdtp_domain_stream_pcm_ack(&motu->domain, &motu->rx_stream);
351332 }
352333 
353334 int snd_motu_create_pcm_devices(struct snd_motu *motu)
....@@ -355,26 +336,22 @@
355336 	static const struct snd_pcm_ops capture_ops = {
356337 		.open      = pcm_open,
357338 		.close     = pcm_close,
358
-		.ioctl     = snd_pcm_lib_ioctl,
359
-		.hw_params = capture_hw_params,
360
-		.hw_free   = capture_hw_free,
339
+		.hw_params = pcm_hw_params,
340
+		.hw_free   = pcm_hw_free,
361341 		.prepare   = capture_prepare,
362342 		.trigger   = capture_trigger,
363343 		.pointer   = capture_pointer,
364344 		.ack       = capture_ack,
365
-		.page      = snd_pcm_lib_get_vmalloc_page,
366345 	};
367346 	static const struct snd_pcm_ops playback_ops = {
368347 		.open      = pcm_open,
369348 		.close     = pcm_close,
370
-		.ioctl     = snd_pcm_lib_ioctl,
371
-		.hw_params = playback_hw_params,
372
-		.hw_free   = playback_hw_free,
349
+		.hw_params = pcm_hw_params,
350
+		.hw_free   = pcm_hw_free,
373351 		.prepare   = playback_prepare,
374352 		.trigger   = playback_trigger,
375353 		.pointer   = playback_pointer,
376354 		.ack       = playback_ack,
377
-		.page      = snd_pcm_lib_get_vmalloc_page,
378355 	};
379356 	struct snd_pcm *pcm;
380357 	int err;
....@@ -387,6 +364,7 @@
387364 
388365 	snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &capture_ops);
389366 	snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &playback_ops);
367
+	snd_pcm_set_managed_buffer_all(pcm, SNDRV_DMA_TYPE_VMALLOC, NULL, 0, 0);
390368 
391369 	return 0;
392370 }