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Release 4.7 sound/firewire/fireworks/fireworks_pcm.c

/*
 * fireworks_pcm.c - a part of driver for Fireworks based devices
 *
 * Copyright (c) 2009-2010 Clemens Ladisch
 * Copyright (c) 2013-2014 Takashi Sakamoto
 *
 * Licensed under the terms of the GNU General Public License, version 2.
 */
#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; }

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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; }

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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); }

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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); }

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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]); } }

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static void limit_period_and_buffer(struct snd_pcm_hardware *hw) { hw->periods_min = 2; /* SNDRV_PCM_INFO_BATCH */ hw->periods_max = UINT_MAX; hw->period_bytes_min = 4 * hw->channels_max; /* bytes for a frame */ /* Just to prevent from allocating much pages. */ hw->period_bytes_max = hw->period_bytes_min * 2048; hw->buffer_bytes_max = hw->period_bytes_max * hw->periods_min; }

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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; runtime->hw.info = SNDRV_PCM_INFO_BATCH | SNDRV_PCM_INFO_BLOCK_TRANSFER | SNDRV_PCM_INFO_INTERLEAVED | SNDRV_PCM_INFO_JOINT_DUPLEX | SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_MMAP_VALID; 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); limit_period_and_buffer(&runtime->hw); 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; }

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static int pcm_open(struct snd_pcm_substream *substream) { struct snd_efw *efw = substream->private_data; unsigned int sampling_rate; enum snd_efw_clock_source clock_source; int err; err = snd_efw_stream_lock_try(efw); if (err < 0) goto end; 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; /* * When source of clock is not internal or any PCM streams are running, * available sampling rate is limited at current sampling rate. */ if ((clock_source != SND_EFW_CLOCK_SOURCE_INTERNAL) || amdtp_stream_pcm_running(&efw->tx_stream) || amdtp_stream_pcm_running(&efw->rx_stream)) { err = snd_efw_command_get_sampling_rate(efw, &sampling_rate); if (err < 0) goto err_locked; substream->runtime->hw.rate_min = sampling_rate; substream->runtime->hw.rate_max = sampling_rate; } snd_pcm_set_sync(substream); end: return err; err_locked: snd_efw_stream_lock_release(efw); return err; }

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static int pcm_close(struct snd_pcm_substream *substream) { struct snd_efw *efw = substream->private_data; snd_efw_stream_lock_release(efw); return 0; }

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static int pcm_capture_hw_params(struct snd_pcm_substream *substream, struct snd_pcm_hw_params *hw_params) { struct snd_efw *efw = substream->private_data; int err; err = snd_pcm_lib_alloc_vmalloc_buffer(substream, params_buffer_bytes(hw_params)); if (err < 0) return err; if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN) { mutex_lock(&efw->mutex); efw->capture_substreams++; mutex_unlock(&efw->mutex); } amdtp_am824_set_pcm_format(&efw->tx_stream, params_format(hw_params)); return 0; }

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static int pcm_playback_hw_params(struct snd_pcm_substream *substream, struct snd_pcm_hw_params *hw_params) { struct snd_efw *efw = substream->private_data; int err; err = snd_pcm_lib_alloc_vmalloc_buffer(substream, params_buffer_bytes(hw_params)); if (err < 0) return err; if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN) { mutex_lock(&efw->mutex); efw->playback_substreams++; mutex_unlock(&efw->mutex); } amdtp_am824_set_pcm_format(&efw->rx_stream, params_format(hw_params)); return 0; }

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static int pcm_capture_hw_free(struct snd_pcm_substream *substream) { struct snd_efw *efw = substream->private_data; if (substream->runtime->status->state != SNDRV_PCM_STATE_OPEN) { mutex_lock(&efw->mutex); efw->capture_substreams--; mutex_unlock(&efw->mutex); } snd_efw_stream_stop_duplex(efw); return snd_pcm_lib_free_vmalloc_buffer(substream); }

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static int pcm_playback_hw_free(struct snd_pcm_substream *substream) { struct snd_efw *efw = substream->private_data; if (substream->runtime->status->state != SNDRV_PCM_STATE_OPEN) { mutex_lock(&efw->mutex); efw->playback_substreams--; mutex_unlock(&efw->mutex); } snd_efw_stream_stop_duplex(efw); return snd_pcm_lib_free_vmalloc_buffer(substream); }

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static int pcm_capture_prepare(struct snd_pcm_substream *substream) { struct snd_efw *efw = substream->private_data; struct snd_pcm_runtime *runtime = substream->runtime; int err; err = snd_efw_stream_start_duplex(efw, runtime->rate); if (err >= 0) amdtp_stream_pcm_prepare(&efw->tx_stream); return err; }

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static int pcm_playback_prepare(struct snd_pcm_substream *substream) { struct snd_efw *efw = substream->private_data; struct snd_pcm_runtime *runtime = substream->runtime; int err; err = snd_efw_stream_start_duplex(efw, runtime->rate); if (err >= 0) amdtp_stream_pcm_prepare(&efw->rx_stream); return err; }

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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; }

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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; }

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static snd_pcm_uframes_t pcm_capture_pointer(struct snd_pcm_substream *sbstrm) { struct snd_efw *efw = sbstrm->private_data; return amdtp_stream_pcm_pointer(&efw->tx_stream); }

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static snd_pcm_uframes_t pcm_playback_pointer(struct snd_pcm_substream *sbstrm) { struct snd_efw *efw = sbstrm->private_data; return amdtp_stream_pcm_pointer(&efw->rx_stream); }

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static const struct snd_pcm_ops pcm_capture_ops = { .open = pcm_open, .close = pcm_close, .ioctl = snd_pcm_lib_ioctl, .hw_params = pcm_capture_hw_params, .hw_free = pcm_capture_hw_free, .prepare = pcm_capture_prepare, .trigger = pcm_capture_trigger, .pointer = pcm_capture_pointer, .page = snd_pcm_lib_get_vmalloc_page, }; static const struct snd_pcm_ops pcm_playback_ops = { .open = pcm_open, .close = pcm_close, .ioctl = snd_pcm_lib_ioctl, .hw_params = pcm_playback_hw_params, .hw_free = pcm_playback_hw_free, .prepare = pcm_playback_prepare, .trigger = pcm_playback_trigger, .pointer = pcm_playback_pointer, .page = snd_pcm_lib_get_vmalloc_page, .mmap = snd_pcm_lib_mmap_vmalloc, };
int snd_efw_create_pcm_devices(struct snd_efw *efw) { 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, &pcm_playback_ops); snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &pcm_capture_ops); end: return err; }

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