434 lines
11 KiB
C
434 lines
11 KiB
C
/*
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* oxfw_pcm.c - a part of driver for OXFW970/971 based devices
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*
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* Copyright (c) Clemens Ladisch <clemens@ladisch.de>
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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 "oxfw.h"
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static int hw_rule_rate(struct snd_pcm_hw_params *params,
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struct snd_pcm_hw_rule *rule)
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{
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u8 **formats = 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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struct snd_oxfw_stream_formation formation;
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int i, err;
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for (i = 0; i < SND_OXFW_STREAM_FORMAT_ENTRIES; i++) {
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if (formats[i] == NULL)
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continue;
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err = snd_oxfw_stream_parse_format(formats[i], &formation);
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if (err < 0)
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continue;
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if (!snd_interval_test(c, formation.pcm))
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continue;
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t.min = min(t.min, formation.rate);
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t.max = max(t.max, formation.rate);
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}
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return snd_interval_refine(r, &t);
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}
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static int hw_rule_channels(struct snd_pcm_hw_params *params,
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struct snd_pcm_hw_rule *rule)
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{
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u8 **formats = 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_oxfw_stream_formation formation;
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int i, j, err;
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unsigned int count, list[SND_OXFW_STREAM_FORMAT_ENTRIES] = {0};
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count = 0;
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for (i = 0; i < SND_OXFW_STREAM_FORMAT_ENTRIES; i++) {
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if (formats[i] == NULL)
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break;
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err = snd_oxfw_stream_parse_format(formats[i], &formation);
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if (err < 0)
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continue;
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if (!snd_interval_test(r, formation.rate))
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continue;
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if (list[count] == formation.pcm)
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continue;
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for (j = 0; j < ARRAY_SIZE(list); j++) {
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if (list[j] == formation.pcm)
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break;
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}
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if (j == ARRAY_SIZE(list)) {
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list[count] = formation.pcm;
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if (++count == ARRAY_SIZE(list))
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break;
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}
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}
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return snd_interval_list(c, count, list, 0);
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}
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static void limit_channels_and_rates(struct snd_pcm_hardware *hw, u8 **formats)
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{
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struct snd_oxfw_stream_formation formation;
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int i, err;
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hw->channels_min = UINT_MAX;
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hw->channels_max = 0;
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hw->rate_min = UINT_MAX;
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hw->rate_max = 0;
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hw->rates = 0;
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for (i = 0; i < SND_OXFW_STREAM_FORMAT_ENTRIES; i++) {
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if (formats[i] == NULL)
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break;
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err = snd_oxfw_stream_parse_format(formats[i], &formation);
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if (err < 0)
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continue;
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hw->channels_min = min(hw->channels_min, formation.pcm);
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hw->channels_max = max(hw->channels_max, formation.pcm);
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hw->rate_min = min(hw->rate_min, formation.rate);
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hw->rate_max = max(hw->rate_max, formation.rate);
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hw->rates |= snd_pcm_rate_to_rate_bit(formation.rate);
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}
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}
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static void limit_period_and_buffer(struct snd_pcm_hardware *hw)
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{
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hw->periods_min = 2; /* SNDRV_PCM_INFO_BATCH */
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hw->periods_max = UINT_MAX;
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hw->period_bytes_min = 4 * hw->channels_max; /* bytes for a frame */
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/* Just to prevent from allocating much pages. */
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hw->period_bytes_max = hw->period_bytes_min * 2048;
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hw->buffer_bytes_max = hw->period_bytes_max * hw->periods_min;
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}
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static int init_hw_params(struct snd_oxfw *oxfw,
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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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u8 **formats;
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struct amdtp_stream *stream;
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int err;
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runtime->hw.info = SNDRV_PCM_INFO_BATCH |
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SNDRV_PCM_INFO_BLOCK_TRANSFER |
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SNDRV_PCM_INFO_INTERLEAVED |
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SNDRV_PCM_INFO_JOINT_DUPLEX |
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SNDRV_PCM_INFO_MMAP |
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SNDRV_PCM_INFO_MMAP_VALID;
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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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stream = &oxfw->tx_stream;
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formats = oxfw->tx_stream_formats;
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} else {
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runtime->hw.formats = AM824_OUT_PCM_FORMAT_BITS;
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stream = &oxfw->rx_stream;
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formats = oxfw->rx_stream_formats;
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}
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limit_channels_and_rates(&runtime->hw, formats);
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limit_period_and_buffer(&runtime->hw);
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err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS,
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hw_rule_channels, formats,
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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, formats,
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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(stream, runtime);
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end:
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return err;
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}
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static int limit_to_current_params(struct snd_pcm_substream *substream)
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{
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struct snd_oxfw *oxfw = substream->private_data;
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struct snd_oxfw_stream_formation formation;
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enum avc_general_plug_dir dir;
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int err;
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if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
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dir = AVC_GENERAL_PLUG_DIR_OUT;
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else
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dir = AVC_GENERAL_PLUG_DIR_IN;
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err = snd_oxfw_stream_get_current_formation(oxfw, dir, &formation);
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if (err < 0)
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goto end;
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substream->runtime->hw.channels_min = formation.pcm;
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substream->runtime->hw.channels_max = formation.pcm;
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substream->runtime->hw.rate_min = formation.rate;
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substream->runtime->hw.rate_max = formation.rate;
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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_oxfw *oxfw = substream->private_data;
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int err;
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err = snd_oxfw_stream_lock_try(oxfw);
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if (err < 0)
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goto end;
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err = init_hw_params(oxfw, substream);
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if (err < 0)
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goto err_locked;
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/*
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* When any PCM streams are already running, the available sampling
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* rate is limited at current value.
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*/
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if (amdtp_stream_pcm_running(&oxfw->tx_stream) ||
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amdtp_stream_pcm_running(&oxfw->rx_stream)) {
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err = limit_to_current_params(substream);
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if (err < 0)
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goto end;
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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_oxfw_stream_lock_release(oxfw);
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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_oxfw *oxfw = substream->private_data;
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snd_oxfw_stream_lock_release(oxfw);
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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_oxfw *oxfw = 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(&oxfw->mutex);
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oxfw->capture_substreams++;
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mutex_unlock(&oxfw->mutex);
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}
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amdtp_am824_set_pcm_format(&oxfw->tx_stream, params_format(hw_params));
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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_oxfw *oxfw = 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(&oxfw->mutex);
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oxfw->playback_substreams++;
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mutex_unlock(&oxfw->mutex);
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}
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amdtp_am824_set_pcm_format(&oxfw->rx_stream, params_format(hw_params));
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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_oxfw *oxfw = substream->private_data;
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mutex_lock(&oxfw->mutex);
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if (substream->runtime->status->state != SNDRV_PCM_STATE_OPEN)
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oxfw->capture_substreams--;
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snd_oxfw_stream_stop_simplex(oxfw, &oxfw->tx_stream);
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mutex_unlock(&oxfw->mutex);
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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_oxfw *oxfw = substream->private_data;
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mutex_lock(&oxfw->mutex);
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if (substream->runtime->status->state != SNDRV_PCM_STATE_OPEN)
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oxfw->playback_substreams--;
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snd_oxfw_stream_stop_simplex(oxfw, &oxfw->rx_stream);
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mutex_unlock(&oxfw->mutex);
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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_oxfw *oxfw = substream->private_data;
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struct snd_pcm_runtime *runtime = substream->runtime;
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int err;
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mutex_lock(&oxfw->mutex);
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err = snd_oxfw_stream_start_simplex(oxfw, &oxfw->tx_stream,
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runtime->rate, runtime->channels);
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mutex_unlock(&oxfw->mutex);
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if (err < 0)
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goto end;
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amdtp_stream_pcm_prepare(&oxfw->tx_stream);
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end:
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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_oxfw *oxfw = substream->private_data;
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struct snd_pcm_runtime *runtime = substream->runtime;
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int err;
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mutex_lock(&oxfw->mutex);
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err = snd_oxfw_stream_start_simplex(oxfw, &oxfw->rx_stream,
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runtime->rate, runtime->channels);
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mutex_unlock(&oxfw->mutex);
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if (err < 0)
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goto end;
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amdtp_stream_pcm_prepare(&oxfw->rx_stream);
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end:
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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_oxfw *oxfw = substream->private_data;
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struct snd_pcm_substream *pcm;
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switch (cmd) {
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case SNDRV_PCM_TRIGGER_START:
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pcm = substream;
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break;
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case SNDRV_PCM_TRIGGER_STOP:
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pcm = 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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amdtp_stream_pcm_trigger(&oxfw->tx_stream, pcm);
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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_oxfw *oxfw = substream->private_data;
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struct snd_pcm_substream *pcm;
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switch (cmd) {
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case SNDRV_PCM_TRIGGER_START:
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pcm = substream;
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break;
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case SNDRV_PCM_TRIGGER_STOP:
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pcm = 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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amdtp_stream_pcm_trigger(&oxfw->rx_stream, pcm);
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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 *sbstm)
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{
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struct snd_oxfw *oxfw = sbstm->private_data;
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return amdtp_stream_pcm_pointer(&oxfw->tx_stream);
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}
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static snd_pcm_uframes_t pcm_playback_pointer(struct snd_pcm_substream *sbstm)
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{
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struct snd_oxfw *oxfw = sbstm->private_data;
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return amdtp_stream_pcm_pointer(&oxfw->rx_stream);
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}
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int snd_oxfw_create_pcm(struct snd_oxfw *oxfw)
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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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.page = snd_pcm_lib_get_vmalloc_page,
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.mmap = snd_pcm_lib_mmap_vmalloc,
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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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.page = snd_pcm_lib_get_vmalloc_page,
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.mmap = snd_pcm_lib_mmap_vmalloc,
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};
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struct snd_pcm *pcm;
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unsigned int cap = 0;
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int err;
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if (oxfw->has_output)
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cap = 1;
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err = snd_pcm_new(oxfw->card, oxfw->card->driver, 0, 1, cap, &pcm);
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if (err < 0)
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return err;
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pcm->private_data = oxfw;
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strcpy(pcm->name, oxfw->card->shortname);
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snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &playback_ops);
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if (cap > 0)
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snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &capture_ops);
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return 0;
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}
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