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;
50 unsigned int i, j, err;
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 void limit_period_and_buffer(struct snd_pcm_hardware *hw)
111 hw->periods_min = 2; /* SNDRV_PCM_INFO_BATCH */
112 hw->periods_max = UINT_MAX;
114 hw->period_bytes_min = 4 * hw->channels_max; /* bytes for a frame */
116 /* Just to prevent from allocating much pages. */
117 hw->period_bytes_max = hw->period_bytes_min * 2048;
118 hw->buffer_bytes_max = hw->period_bytes_max * hw->periods_min;
121 static int init_hw_params(struct snd_oxfw *oxfw,
122 struct snd_pcm_substream *substream)
124 struct snd_pcm_runtime *runtime = substream->runtime;
126 struct amdtp_stream *stream;
129 runtime->hw.info = SNDRV_PCM_INFO_BATCH |
130 SNDRV_PCM_INFO_BLOCK_TRANSFER |
131 SNDRV_PCM_INFO_INTERLEAVED |
132 SNDRV_PCM_INFO_JOINT_DUPLEX |
133 SNDRV_PCM_INFO_MMAP |
134 SNDRV_PCM_INFO_MMAP_VALID;
136 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) {
137 runtime->hw.formats = AMDTP_IN_PCM_FORMAT_BITS;
138 stream = &oxfw->tx_stream;
139 formats = oxfw->tx_stream_formats;
141 runtime->hw.formats = AMDTP_OUT_PCM_FORMAT_BITS;
142 stream = &oxfw->rx_stream;
143 formats = oxfw->rx_stream_formats;
146 limit_channels_and_rates(&runtime->hw, formats);
147 limit_period_and_buffer(&runtime->hw);
149 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS,
150 hw_rule_channels, formats,
151 SNDRV_PCM_HW_PARAM_RATE, -1);
155 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
156 hw_rule_rate, formats,
157 SNDRV_PCM_HW_PARAM_CHANNELS, -1);
161 err = amdtp_stream_add_pcm_hw_constraints(stream, runtime);
166 static int limit_to_current_params(struct snd_pcm_substream *substream)
168 struct snd_oxfw *oxfw = substream->private_data;
169 struct snd_oxfw_stream_formation formation;
170 enum avc_general_plug_dir dir;
173 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
174 dir = AVC_GENERAL_PLUG_DIR_OUT;
176 dir = AVC_GENERAL_PLUG_DIR_IN;
178 err = snd_oxfw_stream_get_current_formation(oxfw, dir, &formation);
182 substream->runtime->hw.channels_min = formation.pcm;
183 substream->runtime->hw.channels_max = formation.pcm;
184 substream->runtime->hw.rate_min = formation.rate;
185 substream->runtime->hw.rate_max = formation.rate;
190 static int pcm_open(struct snd_pcm_substream *substream)
192 struct snd_oxfw *oxfw = substream->private_data;
195 err = init_hw_params(oxfw, substream);
200 * When any PCM streams are already running, the available sampling
201 * rate is limited at current value.
203 if (amdtp_stream_pcm_running(&oxfw->tx_stream) ||
204 amdtp_stream_pcm_running(&oxfw->rx_stream)) {
205 err = limit_to_current_params(substream);
210 snd_pcm_set_sync(substream);
215 static int pcm_close(struct snd_pcm_substream *substream)
220 static int pcm_capture_hw_params(struct snd_pcm_substream *substream,
221 struct snd_pcm_hw_params *hw_params)
223 struct snd_oxfw *oxfw = substream->private_data;
226 if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN) {
227 mutex_lock(&oxfw->mutex);
228 oxfw->capture_substreams++;
229 mutex_unlock(&oxfw->mutex);
232 amdtp_stream_set_pcm_format(&oxfw->tx_stream, params_format(hw_params));
234 return snd_pcm_lib_alloc_vmalloc_buffer(substream,
235 params_buffer_bytes(hw_params));
237 static int pcm_playback_hw_params(struct snd_pcm_substream *substream,
238 struct snd_pcm_hw_params *hw_params)
240 struct snd_oxfw *oxfw = substream->private_data;
242 if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN) {
243 mutex_lock(&oxfw->mutex);
244 oxfw->playback_substreams++;
245 mutex_unlock(&oxfw->mutex);
248 amdtp_stream_set_pcm_format(&oxfw->rx_stream, params_format(hw_params));
250 return snd_pcm_lib_alloc_vmalloc_buffer(substream,
251 params_buffer_bytes(hw_params));
254 static int pcm_capture_hw_free(struct snd_pcm_substream *substream)
256 struct snd_oxfw *oxfw = substream->private_data;
258 mutex_lock(&oxfw->mutex);
260 if (substream->runtime->status->state != SNDRV_PCM_STATE_OPEN)
261 oxfw->capture_substreams--;
263 snd_oxfw_stream_stop_simplex(oxfw, &oxfw->tx_stream);
265 mutex_unlock(&oxfw->mutex);
267 return snd_pcm_lib_free_vmalloc_buffer(substream);
269 static int pcm_playback_hw_free(struct snd_pcm_substream *substream)
271 struct snd_oxfw *oxfw = substream->private_data;
273 mutex_lock(&oxfw->mutex);
275 if (substream->runtime->status->state != SNDRV_PCM_STATE_OPEN)
276 oxfw->playback_substreams--;
278 snd_oxfw_stream_stop_simplex(oxfw, &oxfw->rx_stream);
280 mutex_unlock(&oxfw->mutex);
282 return snd_pcm_lib_free_vmalloc_buffer(substream);
285 static int pcm_capture_prepare(struct snd_pcm_substream *substream)
287 struct snd_oxfw *oxfw = substream->private_data;
288 struct snd_pcm_runtime *runtime = substream->runtime;
291 mutex_lock(&oxfw->mutex);
292 err = snd_oxfw_stream_start_simplex(oxfw, &oxfw->tx_stream,
293 runtime->rate, runtime->channels);
294 mutex_unlock(&oxfw->mutex);
298 amdtp_stream_pcm_prepare(&oxfw->tx_stream);
302 static int pcm_playback_prepare(struct snd_pcm_substream *substream)
304 struct snd_oxfw *oxfw = substream->private_data;
305 struct snd_pcm_runtime *runtime = substream->runtime;
308 mutex_lock(&oxfw->mutex);
309 err = snd_oxfw_stream_start_simplex(oxfw, &oxfw->rx_stream,
310 runtime->rate, runtime->channels);
311 mutex_unlock(&oxfw->mutex);
315 amdtp_stream_pcm_prepare(&oxfw->rx_stream);
320 static int pcm_capture_trigger(struct snd_pcm_substream *substream, int cmd)
322 struct snd_oxfw *oxfw = substream->private_data;
323 struct snd_pcm_substream *pcm;
326 case SNDRV_PCM_TRIGGER_START:
329 case SNDRV_PCM_TRIGGER_STOP:
335 amdtp_stream_pcm_trigger(&oxfw->tx_stream, pcm);
338 static int pcm_playback_trigger(struct snd_pcm_substream *substream, int cmd)
340 struct snd_oxfw *oxfw = substream->private_data;
341 struct snd_pcm_substream *pcm;
344 case SNDRV_PCM_TRIGGER_START:
347 case SNDRV_PCM_TRIGGER_STOP:
353 amdtp_stream_pcm_trigger(&oxfw->rx_stream, pcm);
357 static snd_pcm_uframes_t pcm_capture_pointer(struct snd_pcm_substream *sbstm)
359 struct snd_oxfw *oxfw = sbstm->private_data;
361 return amdtp_stream_pcm_pointer(&oxfw->tx_stream);
363 static snd_pcm_uframes_t pcm_playback_pointer(struct snd_pcm_substream *sbstm)
365 struct snd_oxfw *oxfw = sbstm->private_data;
367 return amdtp_stream_pcm_pointer(&oxfw->rx_stream);
370 int snd_oxfw_create_pcm(struct snd_oxfw *oxfw)
372 static struct snd_pcm_ops capture_ops = {
375 .ioctl = snd_pcm_lib_ioctl,
376 .hw_params = pcm_capture_hw_params,
377 .hw_free = pcm_capture_hw_free,
378 .prepare = pcm_capture_prepare,
379 .trigger = pcm_capture_trigger,
380 .pointer = pcm_capture_pointer,
381 .page = snd_pcm_lib_get_vmalloc_page,
382 .mmap = snd_pcm_lib_mmap_vmalloc,
384 static struct snd_pcm_ops playback_ops = {
387 .ioctl = snd_pcm_lib_ioctl,
388 .hw_params = pcm_playback_hw_params,
389 .hw_free = pcm_playback_hw_free,
390 .prepare = pcm_playback_prepare,
391 .trigger = pcm_playback_trigger,
392 .pointer = pcm_playback_pointer,
393 .page = snd_pcm_lib_get_vmalloc_page,
394 .mmap = snd_pcm_lib_mmap_vmalloc,
397 unsigned int cap = 0;
400 if (oxfw->has_output)
403 err = snd_pcm_new(oxfw->card, oxfw->card->driver, 0, 1, cap, &pcm);
407 pcm->private_data = oxfw;
408 strcpy(pcm->name, oxfw->card->shortname);
409 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &playback_ops);
411 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &capture_ops);