| // SPDX-License-Identifier: GPL-2.0-only |
| /* |
| * fireworks_pcm.c - a part of driver for Fireworks based devices |
| * |
| * Copyright (c) 2009-2010 Clemens Ladisch |
| * Copyright (c) 2013-2014 Takashi Sakamoto |
| */ |
| #include "./fireworks.h" |
| |
| /* |
| * NOTE: |
| * Fireworks changes its AMDTP channels for PCM data according to its sampling |
| * rate. There are three modes. Here _XX is either _rx or _tx. |
| * 0: 32.0- 48.0 kHz then snd_efw_hwinfo.amdtp_XX_pcm_channels applied |
| * 1: 88.2- 96.0 kHz then snd_efw_hwinfo.amdtp_XX_pcm_channels_2x applied |
| * 2: 176.4-192.0 kHz then snd_efw_hwinfo.amdtp_XX_pcm_channels_4x applied |
| * |
| * The number of PCM channels for analog input and output are always fixed but |
| * the number of PCM channels for digital input and output are differed. |
| * |
| * Additionally, according to "AudioFire Owner's Manual Version 2.2", in some |
| * model, the number of PCM channels for digital input has more restriction |
| * depending on which digital interface is selected. |
| * - S/PDIF coaxial and optical : use input 1-2 |
| * - ADAT optical at 32.0-48.0 kHz : use input 1-8 |
| * - ADAT optical at 88.2-96.0 kHz : use input 1-4 (S/MUX format) |
| * |
| * The data in AMDTP channels for blank PCM channels are zero. |
| */ |
| static const unsigned int freq_table[] = { |
| /* multiplier mode 0 */ |
| [0] = 32000, |
| [1] = 44100, |
| [2] = 48000, |
| /* multiplier mode 1 */ |
| [3] = 88200, |
| [4] = 96000, |
| /* multiplier mode 2 */ |
| [5] = 176400, |
| [6] = 192000, |
| }; |
| |
| static inline unsigned int |
| get_multiplier_mode_with_index(unsigned int index) |
| { |
| return ((int)index - 1) / 2; |
| } |
| |
| int snd_efw_get_multiplier_mode(unsigned int sampling_rate, unsigned int *mode) |
| { |
| unsigned int i; |
| |
| for (i = 0; i < ARRAY_SIZE(freq_table); i++) { |
| if (freq_table[i] == sampling_rate) { |
| *mode = get_multiplier_mode_with_index(i); |
| return 0; |
| } |
| } |
| |
| return -EINVAL; |
| } |
| |
| static int |
| hw_rule_rate(struct snd_pcm_hw_params *params, struct snd_pcm_hw_rule *rule) |
| { |
| unsigned int *pcm_channels = rule->private; |
| struct snd_interval *r = |
| hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE); |
| const struct snd_interval *c = |
| hw_param_interval_c(params, SNDRV_PCM_HW_PARAM_CHANNELS); |
| struct snd_interval t = { |
| .min = UINT_MAX, .max = 0, .integer = 1 |
| }; |
| unsigned int i, mode; |
| |
| for (i = 0; i < ARRAY_SIZE(freq_table); i++) { |
| mode = get_multiplier_mode_with_index(i); |
| if (!snd_interval_test(c, pcm_channels[mode])) |
| continue; |
| |
| t.min = min(t.min, freq_table[i]); |
| t.max = max(t.max, freq_table[i]); |
| } |
| |
| return snd_interval_refine(r, &t); |
| } |
| |
| static int |
| hw_rule_channels(struct snd_pcm_hw_params *params, struct snd_pcm_hw_rule *rule) |
| { |
| unsigned int *pcm_channels = rule->private; |
| struct snd_interval *c = |
| hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS); |
| const struct snd_interval *r = |
| hw_param_interval_c(params, SNDRV_PCM_HW_PARAM_RATE); |
| struct snd_interval t = { |
| .min = UINT_MAX, .max = 0, .integer = 1 |
| }; |
| unsigned int i, mode; |
| |
| for (i = 0; i < ARRAY_SIZE(freq_table); i++) { |
| mode = get_multiplier_mode_with_index(i); |
| if (!snd_interval_test(r, freq_table[i])) |
| continue; |
| |
| t.min = min(t.min, pcm_channels[mode]); |
| t.max = max(t.max, pcm_channels[mode]); |
| } |
| |
| return snd_interval_refine(c, &t); |
| } |
| |
| static void |
| limit_channels(struct snd_pcm_hardware *hw, unsigned int *pcm_channels) |
| { |
| unsigned int i, mode; |
| |
| hw->channels_min = UINT_MAX; |
| hw->channels_max = 0; |
| |
| for (i = 0; i < ARRAY_SIZE(freq_table); i++) { |
| mode = get_multiplier_mode_with_index(i); |
| if (pcm_channels[mode] == 0) |
| continue; |
| |
| hw->channels_min = min(hw->channels_min, pcm_channels[mode]); |
| hw->channels_max = max(hw->channels_max, pcm_channels[mode]); |
| } |
| } |
| |
| static int |
| pcm_init_hw_params(struct snd_efw *efw, |
| struct snd_pcm_substream *substream) |
| { |
| struct snd_pcm_runtime *runtime = substream->runtime; |
| struct amdtp_stream *s; |
| unsigned int *pcm_channels; |
| int err; |
| |
| if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) { |
| runtime->hw.formats = AM824_IN_PCM_FORMAT_BITS; |
| s = &efw->tx_stream; |
| pcm_channels = efw->pcm_capture_channels; |
| } else { |
| runtime->hw.formats = AM824_OUT_PCM_FORMAT_BITS; |
| s = &efw->rx_stream; |
| pcm_channels = efw->pcm_playback_channels; |
| } |
| |
| /* limit rates */ |
| runtime->hw.rates = efw->supported_sampling_rate, |
| snd_pcm_limit_hw_rates(runtime); |
| |
| limit_channels(&runtime->hw, pcm_channels); |
| |
| err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS, |
| hw_rule_channels, pcm_channels, |
| SNDRV_PCM_HW_PARAM_RATE, -1); |
| if (err < 0) |
| goto end; |
| |
| err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE, |
| hw_rule_rate, pcm_channels, |
| SNDRV_PCM_HW_PARAM_CHANNELS, -1); |
| if (err < 0) |
| goto end; |
| |
| err = amdtp_am824_add_pcm_hw_constraints(s, runtime); |
| end: |
| return err; |
| } |
| |
| static int pcm_open(struct snd_pcm_substream *substream) |
| { |
| struct snd_efw *efw = substream->private_data; |
| struct amdtp_domain *d = &efw->domain; |
| enum snd_efw_clock_source clock_source; |
| int err; |
| |
| err = snd_efw_stream_lock_try(efw); |
| if (err < 0) |
| return err; |
| |
| err = pcm_init_hw_params(efw, substream); |
| if (err < 0) |
| goto err_locked; |
| |
| err = snd_efw_command_get_clock_source(efw, &clock_source); |
| if (err < 0) |
| goto err_locked; |
| |
| mutex_lock(&efw->mutex); |
| |
| // When source of clock is not internal or any stream is reserved for |
| // transmission of PCM frames, the available sampling rate is limited |
| // at current one. |
| if ((clock_source != SND_EFW_CLOCK_SOURCE_INTERNAL) || |
| (efw->substreams_counter > 0 && d->events_per_period > 0)) { |
| unsigned int frames_per_period = d->events_per_period; |
| unsigned int frames_per_buffer = d->events_per_buffer; |
| unsigned int sampling_rate; |
| |
| err = snd_efw_command_get_sampling_rate(efw, &sampling_rate); |
| if (err < 0) { |
| mutex_unlock(&efw->mutex); |
| goto err_locked; |
| } |
| substream->runtime->hw.rate_min = sampling_rate; |
| substream->runtime->hw.rate_max = sampling_rate; |
| |
| if (frames_per_period > 0) { |
| err = snd_pcm_hw_constraint_minmax(substream->runtime, |
| SNDRV_PCM_HW_PARAM_PERIOD_SIZE, |
| frames_per_period, frames_per_period); |
| if (err < 0) { |
| mutex_unlock(&efw->mutex); |
| goto err_locked; |
| } |
| |
| err = snd_pcm_hw_constraint_minmax(substream->runtime, |
| SNDRV_PCM_HW_PARAM_BUFFER_SIZE, |
| frames_per_buffer, frames_per_buffer); |
| if (err < 0) { |
| mutex_unlock(&efw->mutex); |
| goto err_locked; |
| } |
| } |
| } |
| |
| mutex_unlock(&efw->mutex); |
| |
| snd_pcm_set_sync(substream); |
| |
| return 0; |
| err_locked: |
| snd_efw_stream_lock_release(efw); |
| return err; |
| } |
| |
| static int pcm_close(struct snd_pcm_substream *substream) |
| { |
| struct snd_efw *efw = substream->private_data; |
| snd_efw_stream_lock_release(efw); |
| return 0; |
| } |
| |
| static int pcm_hw_params(struct snd_pcm_substream *substream, |
| struct snd_pcm_hw_params *hw_params) |
| { |
| struct snd_efw *efw = substream->private_data; |
| int err = 0; |
| |
| if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN) { |
| unsigned int rate = params_rate(hw_params); |
| unsigned int frames_per_period = params_period_size(hw_params); |
| unsigned int frames_per_buffer = params_buffer_size(hw_params); |
| |
| mutex_lock(&efw->mutex); |
| err = snd_efw_stream_reserve_duplex(efw, rate, |
| frames_per_period, frames_per_buffer); |
| if (err >= 0) |
| ++efw->substreams_counter; |
| mutex_unlock(&efw->mutex); |
| } |
| |
| return err; |
| } |
| |
| static int pcm_hw_free(struct snd_pcm_substream *substream) |
| { |
| struct snd_efw *efw = substream->private_data; |
| |
| mutex_lock(&efw->mutex); |
| |
| if (substream->runtime->status->state != SNDRV_PCM_STATE_OPEN) |
| --efw->substreams_counter; |
| |
| snd_efw_stream_stop_duplex(efw); |
| |
| mutex_unlock(&efw->mutex); |
| |
| return 0; |
| } |
| |
| static int pcm_capture_prepare(struct snd_pcm_substream *substream) |
| { |
| struct snd_efw *efw = substream->private_data; |
| int err; |
| |
| err = snd_efw_stream_start_duplex(efw); |
| if (err >= 0) |
| amdtp_stream_pcm_prepare(&efw->tx_stream); |
| |
| return err; |
| } |
| static int pcm_playback_prepare(struct snd_pcm_substream *substream) |
| { |
| struct snd_efw *efw = substream->private_data; |
| int err; |
| |
| err = snd_efw_stream_start_duplex(efw); |
| if (err >= 0) |
| amdtp_stream_pcm_prepare(&efw->rx_stream); |
| |
| return err; |
| } |
| |
| static int pcm_capture_trigger(struct snd_pcm_substream *substream, int cmd) |
| { |
| struct snd_efw *efw = substream->private_data; |
| |
| switch (cmd) { |
| case SNDRV_PCM_TRIGGER_START: |
| amdtp_stream_pcm_trigger(&efw->tx_stream, substream); |
| break; |
| case SNDRV_PCM_TRIGGER_STOP: |
| amdtp_stream_pcm_trigger(&efw->tx_stream, NULL); |
| break; |
| default: |
| return -EINVAL; |
| } |
| |
| return 0; |
| } |
| static int pcm_playback_trigger(struct snd_pcm_substream *substream, int cmd) |
| { |
| struct snd_efw *efw = substream->private_data; |
| |
| switch (cmd) { |
| case SNDRV_PCM_TRIGGER_START: |
| amdtp_stream_pcm_trigger(&efw->rx_stream, substream); |
| break; |
| case SNDRV_PCM_TRIGGER_STOP: |
| amdtp_stream_pcm_trigger(&efw->rx_stream, NULL); |
| break; |
| default: |
| return -EINVAL; |
| } |
| |
| return 0; |
| } |
| |
| static snd_pcm_uframes_t pcm_capture_pointer(struct snd_pcm_substream *sbstrm) |
| { |
| struct snd_efw *efw = sbstrm->private_data; |
| |
| return amdtp_domain_stream_pcm_pointer(&efw->domain, &efw->tx_stream); |
| } |
| static snd_pcm_uframes_t pcm_playback_pointer(struct snd_pcm_substream *sbstrm) |
| { |
| struct snd_efw *efw = sbstrm->private_data; |
| |
| return amdtp_domain_stream_pcm_pointer(&efw->domain, &efw->rx_stream); |
| } |
| |
| static int pcm_capture_ack(struct snd_pcm_substream *substream) |
| { |
| struct snd_efw *efw = substream->private_data; |
| |
| return amdtp_domain_stream_pcm_ack(&efw->domain, &efw->tx_stream); |
| } |
| |
| static int pcm_playback_ack(struct snd_pcm_substream *substream) |
| { |
| struct snd_efw *efw = substream->private_data; |
| |
| return amdtp_domain_stream_pcm_ack(&efw->domain, &efw->rx_stream); |
| } |
| |
| int snd_efw_create_pcm_devices(struct snd_efw *efw) |
| { |
| static const struct snd_pcm_ops capture_ops = { |
| .open = pcm_open, |
| .close = pcm_close, |
| .hw_params = pcm_hw_params, |
| .hw_free = pcm_hw_free, |
| .prepare = pcm_capture_prepare, |
| .trigger = pcm_capture_trigger, |
| .pointer = pcm_capture_pointer, |
| .ack = pcm_capture_ack, |
| }; |
| static const struct snd_pcm_ops playback_ops = { |
| .open = pcm_open, |
| .close = pcm_close, |
| .hw_params = pcm_hw_params, |
| .hw_free = pcm_hw_free, |
| .prepare = pcm_playback_prepare, |
| .trigger = pcm_playback_trigger, |
| .pointer = pcm_playback_pointer, |
| .ack = pcm_playback_ack, |
| }; |
| struct snd_pcm *pcm; |
| int err; |
| |
| err = snd_pcm_new(efw->card, efw->card->driver, 0, 1, 1, &pcm); |
| if (err < 0) |
| goto end; |
| |
| pcm->private_data = efw; |
| snprintf(pcm->name, sizeof(pcm->name), "%s PCM", efw->card->shortname); |
| snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &playback_ops); |
| snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &capture_ops); |
| snd_pcm_set_managed_buffer_all(pcm, SNDRV_DMA_TYPE_VMALLOC, NULL, 0, 0); |
| end: |
| return err; |
| } |
| |