2 * oxfw_pcm.c - a part of driver for OXFW970/971 based devices
4 * Copyright (c) Clemens Ladisch <clemens@ladisch.de>
5 * Licensed under the terms of the GNU General Public License, version 2.
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;
175 err = snd_oxfw_stream_lock_try(oxfw);
179 err = init_hw_params(oxfw, substream);
184 * When any PCM streams are already running, the available sampling
185 * rate is limited at current value.
187 if (amdtp_stream_pcm_running(&oxfw->tx_stream) ||
188 amdtp_stream_pcm_running(&oxfw->rx_stream)) {
189 err = limit_to_current_params(substream);
194 snd_pcm_set_sync(substream);
198 snd_oxfw_stream_lock_release(oxfw);
202 static int pcm_close(struct snd_pcm_substream *substream)
204 struct snd_oxfw *oxfw = substream->private_data;
206 snd_oxfw_stream_lock_release(oxfw);
210 static int pcm_capture_hw_params(struct snd_pcm_substream *substream,
211 struct snd_pcm_hw_params *hw_params)
213 struct snd_oxfw *oxfw = substream->private_data;
216 err = snd_pcm_lib_alloc_vmalloc_buffer(substream,
217 params_buffer_bytes(hw_params));
221 if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN) {
222 mutex_lock(&oxfw->mutex);
223 oxfw->capture_substreams++;
224 mutex_unlock(&oxfw->mutex);
229 static int pcm_playback_hw_params(struct snd_pcm_substream *substream,
230 struct snd_pcm_hw_params *hw_params)
232 struct snd_oxfw *oxfw = substream->private_data;
235 err = snd_pcm_lib_alloc_vmalloc_buffer(substream,
236 params_buffer_bytes(hw_params));
240 if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN) {
241 mutex_lock(&oxfw->mutex);
242 oxfw->playback_substreams++;
243 mutex_unlock(&oxfw->mutex);
249 static int pcm_capture_hw_free(struct snd_pcm_substream *substream)
251 struct snd_oxfw *oxfw = substream->private_data;
253 mutex_lock(&oxfw->mutex);
255 if (substream->runtime->status->state != SNDRV_PCM_STATE_OPEN)
256 oxfw->capture_substreams--;
258 snd_oxfw_stream_stop_simplex(oxfw, &oxfw->tx_stream);
260 mutex_unlock(&oxfw->mutex);
262 return snd_pcm_lib_free_vmalloc_buffer(substream);
264 static int pcm_playback_hw_free(struct snd_pcm_substream *substream)
266 struct snd_oxfw *oxfw = substream->private_data;
268 mutex_lock(&oxfw->mutex);
270 if (substream->runtime->status->state != SNDRV_PCM_STATE_OPEN)
271 oxfw->playback_substreams--;
273 snd_oxfw_stream_stop_simplex(oxfw, &oxfw->rx_stream);
275 mutex_unlock(&oxfw->mutex);
277 return snd_pcm_lib_free_vmalloc_buffer(substream);
280 static int pcm_capture_prepare(struct snd_pcm_substream *substream)
282 struct snd_oxfw *oxfw = substream->private_data;
283 struct snd_pcm_runtime *runtime = substream->runtime;
286 mutex_lock(&oxfw->mutex);
287 err = snd_oxfw_stream_start_simplex(oxfw, &oxfw->tx_stream,
288 runtime->rate, runtime->channels);
289 mutex_unlock(&oxfw->mutex);
293 amdtp_stream_pcm_prepare(&oxfw->tx_stream);
297 static int pcm_playback_prepare(struct snd_pcm_substream *substream)
299 struct snd_oxfw *oxfw = substream->private_data;
300 struct snd_pcm_runtime *runtime = substream->runtime;
303 mutex_lock(&oxfw->mutex);
304 err = snd_oxfw_stream_start_simplex(oxfw, &oxfw->rx_stream,
305 runtime->rate, runtime->channels);
306 mutex_unlock(&oxfw->mutex);
310 amdtp_stream_pcm_prepare(&oxfw->rx_stream);
315 static int pcm_capture_trigger(struct snd_pcm_substream *substream, int cmd)
317 struct snd_oxfw *oxfw = substream->private_data;
318 struct snd_pcm_substream *pcm;
321 case SNDRV_PCM_TRIGGER_START:
324 case SNDRV_PCM_TRIGGER_STOP:
330 amdtp_stream_pcm_trigger(&oxfw->tx_stream, pcm);
333 static int pcm_playback_trigger(struct snd_pcm_substream *substream, int cmd)
335 struct snd_oxfw *oxfw = substream->private_data;
336 struct snd_pcm_substream *pcm;
339 case SNDRV_PCM_TRIGGER_START:
342 case SNDRV_PCM_TRIGGER_STOP:
348 amdtp_stream_pcm_trigger(&oxfw->rx_stream, pcm);
352 static snd_pcm_uframes_t pcm_capture_pointer(struct snd_pcm_substream *sbstm)
354 struct snd_oxfw *oxfw = sbstm->private_data;
356 return amdtp_stream_pcm_pointer(&oxfw->tx_stream);
358 static snd_pcm_uframes_t pcm_playback_pointer(struct snd_pcm_substream *sbstm)
360 struct snd_oxfw *oxfw = sbstm->private_data;
362 return amdtp_stream_pcm_pointer(&oxfw->rx_stream);
365 static int pcm_capture_ack(struct snd_pcm_substream *substream)
367 struct snd_oxfw *oxfw = substream->private_data;
369 return amdtp_stream_pcm_ack(&oxfw->tx_stream);
372 static int pcm_playback_ack(struct snd_pcm_substream *substream)
374 struct snd_oxfw *oxfw = substream->private_data;
376 return amdtp_stream_pcm_ack(&oxfw->rx_stream);
379 int snd_oxfw_create_pcm(struct snd_oxfw *oxfw)
381 static const struct snd_pcm_ops capture_ops = {
384 .ioctl = snd_pcm_lib_ioctl,
385 .hw_params = pcm_capture_hw_params,
386 .hw_free = pcm_capture_hw_free,
387 .prepare = pcm_capture_prepare,
388 .trigger = pcm_capture_trigger,
389 .pointer = pcm_capture_pointer,
390 .ack = pcm_capture_ack,
391 .page = snd_pcm_lib_get_vmalloc_page,
393 static const struct snd_pcm_ops playback_ops = {
396 .ioctl = snd_pcm_lib_ioctl,
397 .hw_params = pcm_playback_hw_params,
398 .hw_free = pcm_playback_hw_free,
399 .prepare = pcm_playback_prepare,
400 .trigger = pcm_playback_trigger,
401 .pointer = pcm_playback_pointer,
402 .ack = pcm_playback_ack,
403 .page = snd_pcm_lib_get_vmalloc_page,
406 unsigned int cap = 0;
409 if (oxfw->has_output)
412 err = snd_pcm_new(oxfw->card, oxfw->card->driver, 0, 1, cap, &pcm);
416 pcm->private_data = oxfw;
417 strcpy(pcm->name, oxfw->card->shortname);
418 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &playback_ops);
420 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &capture_ops);