1 // SPDX-License-Identifier: GPL-2.0-only
3 * oxfw_pcm.c - a part of driver for OXFW970/971 based devices
5 * Copyright (c) Clemens Ladisch <clemens@ladisch.de>
10 static int hw_rule_rate(struct snd_pcm_hw_params *params,
11 struct snd_pcm_hw_rule *rule)
13 u8 **formats = 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
21 struct snd_oxfw_stream_formation formation;
24 for (i = 0; i < SND_OXFW_STREAM_FORMAT_ENTRIES; i++) {
25 if (formats[i] == NULL)
28 err = snd_oxfw_stream_parse_format(formats[i], &formation);
31 if (!snd_interval_test(c, formation.pcm))
34 t.min = min(t.min, formation.rate);
35 t.max = max(t.max, formation.rate);
38 return snd_interval_refine(r, &t);
41 static int hw_rule_channels(struct snd_pcm_hw_params *params,
42 struct snd_pcm_hw_rule *rule)
44 u8 **formats = 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_oxfw_stream_formation formation;
51 unsigned int count, list[SND_OXFW_STREAM_FORMAT_ENTRIES] = {0};
54 for (i = 0; i < SND_OXFW_STREAM_FORMAT_ENTRIES; i++) {
55 if (formats[i] == NULL)
58 err = snd_oxfw_stream_parse_format(formats[i], &formation);
61 if (!snd_interval_test(r, formation.rate))
63 if (list[count] == formation.pcm)
66 for (j = 0; j < ARRAY_SIZE(list); j++) {
67 if (list[j] == formation.pcm)
70 if (j == ARRAY_SIZE(list)) {
71 list[count] = formation.pcm;
72 if (++count == ARRAY_SIZE(list))
77 return snd_interval_list(c, count, list, 0);
80 static void limit_channels_and_rates(struct snd_pcm_hardware *hw, u8 **formats)
82 struct snd_oxfw_stream_formation formation;
85 hw->channels_min = UINT_MAX;
88 hw->rate_min = UINT_MAX;
92 for (i = 0; i < SND_OXFW_STREAM_FORMAT_ENTRIES; i++) {
93 if (formats[i] == NULL)
96 err = snd_oxfw_stream_parse_format(formats[i], &formation);
100 hw->channels_min = min(hw->channels_min, formation.pcm);
101 hw->channels_max = max(hw->channels_max, formation.pcm);
103 hw->rate_min = min(hw->rate_min, formation.rate);
104 hw->rate_max = max(hw->rate_max, formation.rate);
105 hw->rates |= snd_pcm_rate_to_rate_bit(formation.rate);
109 static int init_hw_params(struct snd_oxfw *oxfw,
110 struct snd_pcm_substream *substream)
112 struct snd_pcm_runtime *runtime = substream->runtime;
114 struct amdtp_stream *stream;
117 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) {
118 runtime->hw.formats = AM824_IN_PCM_FORMAT_BITS;
119 stream = &oxfw->tx_stream;
120 formats = oxfw->tx_stream_formats;
122 runtime->hw.formats = AM824_OUT_PCM_FORMAT_BITS;
123 stream = &oxfw->rx_stream;
124 formats = oxfw->rx_stream_formats;
127 limit_channels_and_rates(&runtime->hw, formats);
129 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS,
130 hw_rule_channels, formats,
131 SNDRV_PCM_HW_PARAM_RATE, -1);
135 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
136 hw_rule_rate, formats,
137 SNDRV_PCM_HW_PARAM_CHANNELS, -1);
141 err = amdtp_am824_add_pcm_hw_constraints(stream, runtime);
146 static int limit_to_current_params(struct snd_pcm_substream *substream)
148 struct snd_oxfw *oxfw = substream->private_data;
149 struct snd_oxfw_stream_formation formation;
150 enum avc_general_plug_dir dir;
153 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
154 dir = AVC_GENERAL_PLUG_DIR_OUT;
156 dir = AVC_GENERAL_PLUG_DIR_IN;
158 err = snd_oxfw_stream_get_current_formation(oxfw, dir, &formation);
162 substream->runtime->hw.channels_min = formation.pcm;
163 substream->runtime->hw.channels_max = formation.pcm;
164 substream->runtime->hw.rate_min = formation.rate;
165 substream->runtime->hw.rate_max = formation.rate;
170 static int pcm_open(struct snd_pcm_substream *substream)
172 struct snd_oxfw *oxfw = substream->private_data;
173 struct amdtp_domain *d = &oxfw->domain;
176 err = snd_oxfw_stream_lock_try(oxfw);
180 err = init_hw_params(oxfw, substream);
184 mutex_lock(&oxfw->mutex);
186 // When source of clock is not internal or any stream is reserved for
187 // transmission of PCM frames, the available sampling rate is limited
189 if (oxfw->substreams_count > 0 && d->events_per_period > 0) {
190 unsigned int frames_per_period = d->events_per_period;
191 unsigned int frames_per_buffer = d->events_per_buffer;
193 err = limit_to_current_params(substream);
195 mutex_unlock(&oxfw->mutex);
199 if (frames_per_period > 0) {
200 err = snd_pcm_hw_constraint_minmax(substream->runtime,
201 SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
202 frames_per_period, frames_per_period);
204 mutex_unlock(&oxfw->mutex);
208 err = snd_pcm_hw_constraint_minmax(substream->runtime,
209 SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
210 frames_per_buffer, frames_per_buffer);
212 mutex_unlock(&oxfw->mutex);
218 mutex_unlock(&oxfw->mutex);
220 snd_pcm_set_sync(substream);
224 snd_oxfw_stream_lock_release(oxfw);
228 static int pcm_close(struct snd_pcm_substream *substream)
230 struct snd_oxfw *oxfw = substream->private_data;
232 snd_oxfw_stream_lock_release(oxfw);
236 static int pcm_capture_hw_params(struct snd_pcm_substream *substream,
237 struct snd_pcm_hw_params *hw_params)
239 struct snd_oxfw *oxfw = substream->private_data;
242 if (substream->runtime->state == SNDRV_PCM_STATE_OPEN) {
243 unsigned int rate = params_rate(hw_params);
244 unsigned int channels = params_channels(hw_params);
245 unsigned int frames_per_period = params_period_size(hw_params);
246 unsigned int frames_per_buffer = params_buffer_size(hw_params);
248 mutex_lock(&oxfw->mutex);
249 err = snd_oxfw_stream_reserve_duplex(oxfw, &oxfw->tx_stream,
250 rate, channels, frames_per_period,
253 ++oxfw->substreams_count;
254 mutex_unlock(&oxfw->mutex);
259 static int pcm_playback_hw_params(struct snd_pcm_substream *substream,
260 struct snd_pcm_hw_params *hw_params)
262 struct snd_oxfw *oxfw = substream->private_data;
265 if (substream->runtime->state == SNDRV_PCM_STATE_OPEN) {
266 unsigned int rate = params_rate(hw_params);
267 unsigned int channels = params_channels(hw_params);
268 unsigned int frames_per_period = params_period_size(hw_params);
269 unsigned int frames_per_buffer = params_buffer_size(hw_params);
271 mutex_lock(&oxfw->mutex);
272 err = snd_oxfw_stream_reserve_duplex(oxfw, &oxfw->rx_stream,
273 rate, channels, frames_per_period,
276 ++oxfw->substreams_count;
277 mutex_unlock(&oxfw->mutex);
283 static int pcm_capture_hw_free(struct snd_pcm_substream *substream)
285 struct snd_oxfw *oxfw = substream->private_data;
287 mutex_lock(&oxfw->mutex);
289 if (substream->runtime->state != SNDRV_PCM_STATE_OPEN)
290 --oxfw->substreams_count;
292 snd_oxfw_stream_stop_duplex(oxfw);
294 mutex_unlock(&oxfw->mutex);
298 static int pcm_playback_hw_free(struct snd_pcm_substream *substream)
300 struct snd_oxfw *oxfw = substream->private_data;
302 mutex_lock(&oxfw->mutex);
304 if (substream->runtime->state != SNDRV_PCM_STATE_OPEN)
305 --oxfw->substreams_count;
307 snd_oxfw_stream_stop_duplex(oxfw);
309 mutex_unlock(&oxfw->mutex);
314 static int pcm_capture_prepare(struct snd_pcm_substream *substream)
316 struct snd_oxfw *oxfw = substream->private_data;
319 mutex_lock(&oxfw->mutex);
320 err = snd_oxfw_stream_start_duplex(oxfw);
321 mutex_unlock(&oxfw->mutex);
325 amdtp_stream_pcm_prepare(&oxfw->tx_stream);
329 static int pcm_playback_prepare(struct snd_pcm_substream *substream)
331 struct snd_oxfw *oxfw = substream->private_data;
334 mutex_lock(&oxfw->mutex);
335 err = snd_oxfw_stream_start_duplex(oxfw);
336 mutex_unlock(&oxfw->mutex);
340 amdtp_stream_pcm_prepare(&oxfw->rx_stream);
345 static int pcm_capture_trigger(struct snd_pcm_substream *substream, int cmd)
347 struct snd_oxfw *oxfw = substream->private_data;
348 struct snd_pcm_substream *pcm;
351 case SNDRV_PCM_TRIGGER_START:
354 case SNDRV_PCM_TRIGGER_STOP:
360 amdtp_stream_pcm_trigger(&oxfw->tx_stream, pcm);
363 static int pcm_playback_trigger(struct snd_pcm_substream *substream, int cmd)
365 struct snd_oxfw *oxfw = substream->private_data;
366 struct snd_pcm_substream *pcm;
369 case SNDRV_PCM_TRIGGER_START:
372 case SNDRV_PCM_TRIGGER_STOP:
378 amdtp_stream_pcm_trigger(&oxfw->rx_stream, pcm);
382 static snd_pcm_uframes_t pcm_capture_pointer(struct snd_pcm_substream *sbstm)
384 struct snd_oxfw *oxfw = sbstm->private_data;
386 return amdtp_domain_stream_pcm_pointer(&oxfw->domain, &oxfw->tx_stream);
388 static snd_pcm_uframes_t pcm_playback_pointer(struct snd_pcm_substream *sbstm)
390 struct snd_oxfw *oxfw = sbstm->private_data;
392 return amdtp_domain_stream_pcm_pointer(&oxfw->domain, &oxfw->rx_stream);
395 static int pcm_capture_ack(struct snd_pcm_substream *substream)
397 struct snd_oxfw *oxfw = substream->private_data;
399 return amdtp_domain_stream_pcm_ack(&oxfw->domain, &oxfw->tx_stream);
402 static int pcm_playback_ack(struct snd_pcm_substream *substream)
404 struct snd_oxfw *oxfw = substream->private_data;
406 return amdtp_domain_stream_pcm_ack(&oxfw->domain, &oxfw->rx_stream);
409 int snd_oxfw_create_pcm(struct snd_oxfw *oxfw)
411 static const struct snd_pcm_ops capture_ops = {
414 .hw_params = pcm_capture_hw_params,
415 .hw_free = pcm_capture_hw_free,
416 .prepare = pcm_capture_prepare,
417 .trigger = pcm_capture_trigger,
418 .pointer = pcm_capture_pointer,
419 .ack = pcm_capture_ack,
421 static const struct snd_pcm_ops playback_ops = {
424 .hw_params = pcm_playback_hw_params,
425 .hw_free = pcm_playback_hw_free,
426 .prepare = pcm_playback_prepare,
427 .trigger = pcm_playback_trigger,
428 .pointer = pcm_playback_pointer,
429 .ack = pcm_playback_ack,
432 unsigned int cap = 0;
435 if (oxfw->has_output)
438 err = snd_pcm_new(oxfw->card, oxfw->card->driver, 0, 1, cap, &pcm);
442 pcm->private_data = oxfw;
443 strcpy(pcm->name, oxfw->card->shortname);
444 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &playback_ops);
446 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &capture_ops);
447 snd_pcm_set_managed_buffer_all(pcm, SNDRV_DMA_TYPE_VMALLOC, NULL, 0, 0);