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1// SPDX-License-Identifier: GPL-2.0-only2/*3 * fireworks_pcm.c - a part of driver for Fireworks based devices4 *5 * Copyright (c) 2009-2010 Clemens Ladisch6 * Copyright (c) 2013-2014 Takashi Sakamoto7 */8#include "./fireworks.h"9 10/*11 * NOTE:12 * Fireworks changes its AMDTP channels for PCM data according to its sampling13 * rate. There are three modes. Here _XX is either _rx or _tx.14 * 0: 32.0- 48.0 kHz then snd_efw_hwinfo.amdtp_XX_pcm_channels applied15 * 1: 88.2- 96.0 kHz then snd_efw_hwinfo.amdtp_XX_pcm_channels_2x applied16 * 2: 176.4-192.0 kHz then snd_efw_hwinfo.amdtp_XX_pcm_channels_4x applied17 *18 * The number of PCM channels for analog input and output are always fixed but19 * the number of PCM channels for digital input and output are differed.20 *21 * Additionally, according to "AudioFire Owner's Manual Version 2.2", in some22 * model, the number of PCM channels for digital input has more restriction23 * depending on which digital interface is selected.24 * - S/PDIF coaxial and optical : use input 1-225 * - ADAT optical at 32.0-48.0 kHz : use input 1-826 * - ADAT optical at 88.2-96.0 kHz : use input 1-4 (S/MUX format)27 *28 * The data in AMDTP channels for blank PCM channels are zero.29 */30static const unsigned int freq_table[] = {31 /* multiplier mode 0 */32 [0] = 32000,33 [1] = 44100,34 [2] = 48000,35 /* multiplier mode 1 */36 [3] = 88200,37 [4] = 96000,38 /* multiplier mode 2 */39 [5] = 176400,40 [6] = 192000,41};42 43static inline unsigned int44get_multiplier_mode_with_index(unsigned int index)45{46 return ((int)index - 1) / 2;47}48 49int snd_efw_get_multiplier_mode(unsigned int sampling_rate, unsigned int *mode)50{51 unsigned int i;52 53 for (i = 0; i < ARRAY_SIZE(freq_table); i++) {54 if (freq_table[i] == sampling_rate) {55 *mode = get_multiplier_mode_with_index(i);56 return 0;57 }58 }59 60 return -EINVAL;61}62 63static int64hw_rule_rate(struct snd_pcm_hw_params *params, struct snd_pcm_hw_rule *rule)65{66 unsigned int *pcm_channels = rule->private;67 struct snd_interval *r =68 hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE);69 const struct snd_interval *c =70 hw_param_interval_c(params, SNDRV_PCM_HW_PARAM_CHANNELS);71 struct snd_interval t = {72 .min = UINT_MAX, .max = 0, .integer = 173 };74 unsigned int i, mode;75 76 for (i = 0; i < ARRAY_SIZE(freq_table); i++) {77 mode = get_multiplier_mode_with_index(i);78 if (!snd_interval_test(c, pcm_channels[mode]))79 continue;80 81 t.min = min(t.min, freq_table[i]);82 t.max = max(t.max, freq_table[i]);83 }84 85 return snd_interval_refine(r, &t);86}87 88static int89hw_rule_channels(struct snd_pcm_hw_params *params, struct snd_pcm_hw_rule *rule)90{91 unsigned int *pcm_channels = rule->private;92 struct snd_interval *c =93 hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS);94 const struct snd_interval *r =95 hw_param_interval_c(params, SNDRV_PCM_HW_PARAM_RATE);96 struct snd_interval t = {97 .min = UINT_MAX, .max = 0, .integer = 198 };99 unsigned int i, mode;100 101 for (i = 0; i < ARRAY_SIZE(freq_table); i++) {102 mode = get_multiplier_mode_with_index(i);103 if (!snd_interval_test(r, freq_table[i]))104 continue;105 106 t.min = min(t.min, pcm_channels[mode]);107 t.max = max(t.max, pcm_channels[mode]);108 }109 110 return snd_interval_refine(c, &t);111}112 113static void114limit_channels(struct snd_pcm_hardware *hw, unsigned int *pcm_channels)115{116 unsigned int i, mode;117 118 hw->channels_min = UINT_MAX;119 hw->channels_max = 0;120 121 for (i = 0; i < ARRAY_SIZE(freq_table); i++) {122 mode = get_multiplier_mode_with_index(i);123 if (pcm_channels[mode] == 0)124 continue;125 126 hw->channels_min = min(hw->channels_min, pcm_channels[mode]);127 hw->channels_max = max(hw->channels_max, pcm_channels[mode]);128 }129}130 131static int132pcm_init_hw_params(struct snd_efw *efw,133 struct snd_pcm_substream *substream)134{135 struct snd_pcm_runtime *runtime = substream->runtime;136 struct amdtp_stream *s;137 unsigned int *pcm_channels;138 int err;139 140 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) {141 runtime->hw.formats = AM824_IN_PCM_FORMAT_BITS;142 s = &efw->tx_stream;143 pcm_channels = efw->pcm_capture_channels;144 } else {145 runtime->hw.formats = AM824_OUT_PCM_FORMAT_BITS;146 s = &efw->rx_stream;147 pcm_channels = efw->pcm_playback_channels;148 }149 150 /* limit rates */151 runtime->hw.rates = efw->supported_sampling_rate;152 snd_pcm_limit_hw_rates(runtime);153 154 limit_channels(&runtime->hw, pcm_channels);155 156 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS,157 hw_rule_channels, pcm_channels,158 SNDRV_PCM_HW_PARAM_RATE, -1);159 if (err < 0)160 goto end;161 162 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,163 hw_rule_rate, pcm_channels,164 SNDRV_PCM_HW_PARAM_CHANNELS, -1);165 if (err < 0)166 goto end;167 168 err = amdtp_am824_add_pcm_hw_constraints(s, runtime);169end:170 return err;171}172 173static int pcm_open(struct snd_pcm_substream *substream)174{175 struct snd_efw *efw = substream->private_data;176 struct amdtp_domain *d = &efw->domain;177 enum snd_efw_clock_source clock_source;178 int err;179 180 err = snd_efw_stream_lock_try(efw);181 if (err < 0)182 return err;183 184 err = pcm_init_hw_params(efw, substream);185 if (err < 0)186 goto err_locked;187 188 err = snd_efw_command_get_clock_source(efw, &clock_source);189 if (err < 0)190 goto err_locked;191 192 mutex_lock(&efw->mutex);193 194 // When source of clock is not internal or any stream is reserved for195 // transmission of PCM frames, the available sampling rate is limited196 // at current one.197 if ((clock_source != SND_EFW_CLOCK_SOURCE_INTERNAL) ||198 (efw->substreams_counter > 0 && d->events_per_period > 0)) {199 unsigned int frames_per_period = d->events_per_period;200 unsigned int frames_per_buffer = d->events_per_buffer;201 unsigned int sampling_rate;202 203 err = snd_efw_command_get_sampling_rate(efw, &sampling_rate);204 if (err < 0) {205 mutex_unlock(&efw->mutex);206 goto err_locked;207 }208 substream->runtime->hw.rate_min = sampling_rate;209 substream->runtime->hw.rate_max = sampling_rate;210 211 if (frames_per_period > 0) {212 err = snd_pcm_hw_constraint_minmax(substream->runtime,213 SNDRV_PCM_HW_PARAM_PERIOD_SIZE,214 frames_per_period, frames_per_period);215 if (err < 0) {216 mutex_unlock(&efw->mutex);217 goto err_locked;218 }219 220 err = snd_pcm_hw_constraint_minmax(substream->runtime,221 SNDRV_PCM_HW_PARAM_BUFFER_SIZE,222 frames_per_buffer, frames_per_buffer);223 if (err < 0) {224 mutex_unlock(&efw->mutex);225 goto err_locked;226 }227 }228 }229 230 mutex_unlock(&efw->mutex);231 232 snd_pcm_set_sync(substream);233 234 return 0;235err_locked:236 snd_efw_stream_lock_release(efw);237 return err;238}239 240static int pcm_close(struct snd_pcm_substream *substream)241{242 struct snd_efw *efw = substream->private_data;243 snd_efw_stream_lock_release(efw);244 return 0;245}246 247static int pcm_hw_params(struct snd_pcm_substream *substream,248 struct snd_pcm_hw_params *hw_params)249{250 struct snd_efw *efw = substream->private_data;251 int err = 0;252 253 if (substream->runtime->state == SNDRV_PCM_STATE_OPEN) {254 unsigned int rate = params_rate(hw_params);255 unsigned int frames_per_period = params_period_size(hw_params);256 unsigned int frames_per_buffer = params_buffer_size(hw_params);257 258 mutex_lock(&efw->mutex);259 err = snd_efw_stream_reserve_duplex(efw, rate,260 frames_per_period, frames_per_buffer);261 if (err >= 0)262 ++efw->substreams_counter;263 mutex_unlock(&efw->mutex);264 }265 266 return err;267}268 269static int pcm_hw_free(struct snd_pcm_substream *substream)270{271 struct snd_efw *efw = substream->private_data;272 273 mutex_lock(&efw->mutex);274 275 if (substream->runtime->state != SNDRV_PCM_STATE_OPEN)276 --efw->substreams_counter;277 278 snd_efw_stream_stop_duplex(efw);279 280 mutex_unlock(&efw->mutex);281 282 return 0;283}284 285static int pcm_capture_prepare(struct snd_pcm_substream *substream)286{287 struct snd_efw *efw = substream->private_data;288 int err;289 290 err = snd_efw_stream_start_duplex(efw);291 if (err >= 0)292 amdtp_stream_pcm_prepare(&efw->tx_stream);293 294 return err;295}296static int pcm_playback_prepare(struct snd_pcm_substream *substream)297{298 struct snd_efw *efw = substream->private_data;299 int err;300 301 err = snd_efw_stream_start_duplex(efw);302 if (err >= 0)303 amdtp_stream_pcm_prepare(&efw->rx_stream);304 305 return err;306}307 308static int pcm_capture_trigger(struct snd_pcm_substream *substream, int cmd)309{310 struct snd_efw *efw = substream->private_data;311 312 switch (cmd) {313 case SNDRV_PCM_TRIGGER_START:314 amdtp_stream_pcm_trigger(&efw->tx_stream, substream);315 break;316 case SNDRV_PCM_TRIGGER_STOP:317 amdtp_stream_pcm_trigger(&efw->tx_stream, NULL);318 break;319 default:320 return -EINVAL;321 }322 323 return 0;324}325static int pcm_playback_trigger(struct snd_pcm_substream *substream, int cmd)326{327 struct snd_efw *efw = substream->private_data;328 329 switch (cmd) {330 case SNDRV_PCM_TRIGGER_START:331 amdtp_stream_pcm_trigger(&efw->rx_stream, substream);332 break;333 case SNDRV_PCM_TRIGGER_STOP:334 amdtp_stream_pcm_trigger(&efw->rx_stream, NULL);335 break;336 default:337 return -EINVAL;338 }339 340 return 0;341}342 343static snd_pcm_uframes_t pcm_capture_pointer(struct snd_pcm_substream *sbstrm)344{345 struct snd_efw *efw = sbstrm->private_data;346 347 return amdtp_domain_stream_pcm_pointer(&efw->domain, &efw->tx_stream);348}349static snd_pcm_uframes_t pcm_playback_pointer(struct snd_pcm_substream *sbstrm)350{351 struct snd_efw *efw = sbstrm->private_data;352 353 return amdtp_domain_stream_pcm_pointer(&efw->domain, &efw->rx_stream);354}355 356static int pcm_capture_ack(struct snd_pcm_substream *substream)357{358 struct snd_efw *efw = substream->private_data;359 360 return amdtp_domain_stream_pcm_ack(&efw->domain, &efw->tx_stream);361}362 363static int pcm_playback_ack(struct snd_pcm_substream *substream)364{365 struct snd_efw *efw = substream->private_data;366 367 return amdtp_domain_stream_pcm_ack(&efw->domain, &efw->rx_stream);368}369 370int snd_efw_create_pcm_devices(struct snd_efw *efw)371{372 static const struct snd_pcm_ops capture_ops = {373 .open = pcm_open,374 .close = pcm_close,375 .hw_params = pcm_hw_params,376 .hw_free = pcm_hw_free,377 .prepare = pcm_capture_prepare,378 .trigger = pcm_capture_trigger,379 .pointer = pcm_capture_pointer,380 .ack = pcm_capture_ack,381 };382 static const struct snd_pcm_ops playback_ops = {383 .open = pcm_open,384 .close = pcm_close,385 .hw_params = pcm_hw_params,386 .hw_free = pcm_hw_free,387 .prepare = pcm_playback_prepare,388 .trigger = pcm_playback_trigger,389 .pointer = pcm_playback_pointer,390 .ack = pcm_playback_ack,391 };392 struct snd_pcm *pcm;393 int err;394 395 err = snd_pcm_new(efw->card, efw->card->driver, 0, 1, 1, &pcm);396 if (err < 0)397 goto end;398 399 pcm->private_data = efw;400 pcm->nonatomic = true;401 snprintf(pcm->name, sizeof(pcm->name), "%s PCM", efw->card->shortname);402 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &playback_ops);403 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &capture_ops);404 snd_pcm_set_managed_buffer_all(pcm, SNDRV_DMA_TYPE_VMALLOC, NULL, 0, 0);405end:406 return err;407}408 409