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