| // SPDX-License-Identifier: GPL-2.0-only |
| /* |
| * digi00x-pcm.c - a part of driver for Digidesign Digi 002/003 family |
| * |
| * Copyright (c) 2014-2015 Takashi Sakamoto |
| */ |
| |
| #include "digi00x.h" |
| |
| static int hw_rule_rate(struct snd_pcm_hw_params *params, |
| struct snd_pcm_hw_rule *rule) |
| { |
| 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; |
| |
| for (i = 0; i < SND_DG00X_RATE_COUNT; i++) { |
| if (!snd_interval_test(c, |
| snd_dg00x_stream_pcm_channels[i])) |
| continue; |
| |
| t.min = min(t.min, snd_dg00x_stream_rates[i]); |
| t.max = max(t.max, snd_dg00x_stream_rates[i]); |
| } |
| |
| return snd_interval_refine(r, &t); |
| } |
| |
| static int hw_rule_channels(struct snd_pcm_hw_params *params, |
| struct snd_pcm_hw_rule *rule) |
| { |
| 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; |
| |
| for (i = 0; i < SND_DG00X_RATE_COUNT; i++) { |
| if (!snd_interval_test(r, snd_dg00x_stream_rates[i])) |
| continue; |
| |
| t.min = min(t.min, snd_dg00x_stream_pcm_channels[i]); |
| t.max = max(t.max, snd_dg00x_stream_pcm_channels[i]); |
| } |
| |
| return snd_interval_refine(c, &t); |
| } |
| |
| static int pcm_init_hw_params(struct snd_dg00x *dg00x, |
| struct snd_pcm_substream *substream) |
| { |
| struct snd_pcm_runtime *runtime = substream->runtime; |
| struct snd_pcm_hardware *hw = &runtime->hw; |
| struct amdtp_stream *s; |
| int err; |
| |
| |
| if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) { |
| substream->runtime->hw.formats = SNDRV_PCM_FMTBIT_S32; |
| s = &dg00x->tx_stream; |
| } else { |
| substream->runtime->hw.formats = SNDRV_PCM_FMTBIT_S32; |
| s = &dg00x->rx_stream; |
| } |
| |
| hw->channels_min = 10; |
| hw->channels_max = 18; |
| |
| hw->rates = SNDRV_PCM_RATE_44100 | |
| SNDRV_PCM_RATE_48000 | |
| SNDRV_PCM_RATE_88200 | |
| SNDRV_PCM_RATE_96000; |
| snd_pcm_limit_hw_rates(runtime); |
| |
| err = snd_pcm_hw_rule_add(substream->runtime, 0, |
| SNDRV_PCM_HW_PARAM_CHANNELS, |
| hw_rule_channels, NULL, |
| SNDRV_PCM_HW_PARAM_RATE, -1); |
| if (err < 0) |
| return err; |
| |
| err = snd_pcm_hw_rule_add(substream->runtime, 0, |
| SNDRV_PCM_HW_PARAM_RATE, |
| hw_rule_rate, NULL, |
| SNDRV_PCM_HW_PARAM_CHANNELS, -1); |
| if (err < 0) |
| return err; |
| |
| return amdtp_dot_add_pcm_hw_constraints(s, substream->runtime); |
| } |
| |
| static int pcm_open(struct snd_pcm_substream *substream) |
| { |
| struct snd_dg00x *dg00x = substream->private_data; |
| enum snd_dg00x_clock clock; |
| bool detect; |
| unsigned int rate; |
| int err; |
| |
| err = snd_dg00x_stream_lock_try(dg00x); |
| if (err < 0) |
| goto end; |
| |
| err = pcm_init_hw_params(dg00x, substream); |
| if (err < 0) |
| goto err_locked; |
| |
| /* Check current clock source. */ |
| err = snd_dg00x_stream_get_clock(dg00x, &clock); |
| if (err < 0) |
| goto err_locked; |
| if (clock != SND_DG00X_CLOCK_INTERNAL) { |
| err = snd_dg00x_stream_check_external_clock(dg00x, &detect); |
| if (err < 0) |
| goto err_locked; |
| if (!detect) { |
| err = -EBUSY; |
| goto err_locked; |
| } |
| } |
| |
| if ((clock != SND_DG00X_CLOCK_INTERNAL) || |
| amdtp_stream_pcm_running(&dg00x->rx_stream) || |
| amdtp_stream_pcm_running(&dg00x->tx_stream)) { |
| err = snd_dg00x_stream_get_external_rate(dg00x, &rate); |
| if (err < 0) |
| goto err_locked; |
| substream->runtime->hw.rate_min = rate; |
| substream->runtime->hw.rate_max = rate; |
| } |
| |
| snd_pcm_set_sync(substream); |
| end: |
| return err; |
| err_locked: |
| snd_dg00x_stream_lock_release(dg00x); |
| return err; |
| } |
| |
| static int pcm_close(struct snd_pcm_substream *substream) |
| { |
| struct snd_dg00x *dg00x = substream->private_data; |
| |
| snd_dg00x_stream_lock_release(dg00x); |
| |
| return 0; |
| } |
| |
| static int pcm_hw_params(struct snd_pcm_substream *substream, |
| struct snd_pcm_hw_params *hw_params) |
| { |
| struct snd_dg00x *dg00x = 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) { |
| unsigned int rate = params_rate(hw_params); |
| |
| mutex_lock(&dg00x->mutex); |
| err = snd_dg00x_stream_reserve_duplex(dg00x, rate); |
| if (err >= 0) |
| ++dg00x->substreams_counter; |
| mutex_unlock(&dg00x->mutex); |
| } |
| |
| return err; |
| } |
| |
| static int pcm_hw_free(struct snd_pcm_substream *substream) |
| { |
| struct snd_dg00x *dg00x = substream->private_data; |
| |
| mutex_lock(&dg00x->mutex); |
| |
| if (substream->runtime->status->state != SNDRV_PCM_STATE_OPEN) |
| --dg00x->substreams_counter; |
| |
| snd_dg00x_stream_stop_duplex(dg00x); |
| |
| mutex_unlock(&dg00x->mutex); |
| |
| return snd_pcm_lib_free_vmalloc_buffer(substream); |
| } |
| |
| static int pcm_capture_prepare(struct snd_pcm_substream *substream) |
| { |
| struct snd_dg00x *dg00x = substream->private_data; |
| int err; |
| |
| mutex_lock(&dg00x->mutex); |
| |
| err = snd_dg00x_stream_start_duplex(dg00x); |
| if (err >= 0) |
| amdtp_stream_pcm_prepare(&dg00x->tx_stream); |
| |
| mutex_unlock(&dg00x->mutex); |
| |
| return err; |
| } |
| |
| static int pcm_playback_prepare(struct snd_pcm_substream *substream) |
| { |
| struct snd_dg00x *dg00x = substream->private_data; |
| int err; |
| |
| mutex_lock(&dg00x->mutex); |
| |
| err = snd_dg00x_stream_start_duplex(dg00x); |
| if (err >= 0) { |
| amdtp_stream_pcm_prepare(&dg00x->rx_stream); |
| amdtp_dot_reset(&dg00x->rx_stream); |
| } |
| |
| mutex_unlock(&dg00x->mutex); |
| |
| return err; |
| } |
| |
| static int pcm_capture_trigger(struct snd_pcm_substream *substream, int cmd) |
| { |
| struct snd_dg00x *dg00x = substream->private_data; |
| |
| switch (cmd) { |
| case SNDRV_PCM_TRIGGER_START: |
| amdtp_stream_pcm_trigger(&dg00x->tx_stream, substream); |
| break; |
| case SNDRV_PCM_TRIGGER_STOP: |
| amdtp_stream_pcm_trigger(&dg00x->tx_stream, NULL); |
| break; |
| default: |
| return -EINVAL; |
| } |
| |
| return 0; |
| } |
| |
| static int pcm_playback_trigger(struct snd_pcm_substream *substream, int cmd) |
| { |
| struct snd_dg00x *dg00x = substream->private_data; |
| |
| switch (cmd) { |
| case SNDRV_PCM_TRIGGER_START: |
| amdtp_stream_pcm_trigger(&dg00x->rx_stream, substream); |
| break; |
| case SNDRV_PCM_TRIGGER_STOP: |
| amdtp_stream_pcm_trigger(&dg00x->rx_stream, NULL); |
| break; |
| default: |
| return -EINVAL; |
| } |
| |
| return 0; |
| } |
| |
| static snd_pcm_uframes_t pcm_capture_pointer(struct snd_pcm_substream *sbstrm) |
| { |
| struct snd_dg00x *dg00x = sbstrm->private_data; |
| |
| return amdtp_stream_pcm_pointer(&dg00x->tx_stream); |
| } |
| |
| static snd_pcm_uframes_t pcm_playback_pointer(struct snd_pcm_substream *sbstrm) |
| { |
| struct snd_dg00x *dg00x = sbstrm->private_data; |
| |
| return amdtp_stream_pcm_pointer(&dg00x->rx_stream); |
| } |
| |
| static int pcm_capture_ack(struct snd_pcm_substream *substream) |
| { |
| struct snd_dg00x *dg00x = substream->private_data; |
| |
| return amdtp_stream_pcm_ack(&dg00x->tx_stream); |
| } |
| |
| static int pcm_playback_ack(struct snd_pcm_substream *substream) |
| { |
| struct snd_dg00x *dg00x = substream->private_data; |
| |
| return amdtp_stream_pcm_ack(&dg00x->rx_stream); |
| } |
| |
| int snd_dg00x_create_pcm_devices(struct snd_dg00x *dg00x) |
| { |
| static const struct snd_pcm_ops capture_ops = { |
| .open = pcm_open, |
| .close = pcm_close, |
| .ioctl = snd_pcm_lib_ioctl, |
| .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, |
| .page = snd_pcm_lib_get_vmalloc_page, |
| }; |
| static const struct snd_pcm_ops playback_ops = { |
| .open = pcm_open, |
| .close = pcm_close, |
| .ioctl = snd_pcm_lib_ioctl, |
| .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, |
| .page = snd_pcm_lib_get_vmalloc_page, |
| }; |
| struct snd_pcm *pcm; |
| int err; |
| |
| err = snd_pcm_new(dg00x->card, dg00x->card->driver, 0, 1, 1, &pcm); |
| if (err < 0) |
| return err; |
| |
| pcm->private_data = dg00x; |
| snprintf(pcm->name, sizeof(pcm->name), |
| "%s PCM", dg00x->card->shortname); |
| snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &playback_ops); |
| snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &capture_ops); |
| |
| return 0; |
| } |