431 lines
11 KiB
C
431 lines
11 KiB
C
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/**
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* Copyright (C) 2008, Creative Technology Ltd. All Rights Reserved.
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*
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* This source file is released under GPL v2 license (no other versions).
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* See the COPYING file included in the main directory of this source
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* distribution for the license terms and conditions.
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*
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* @File ctpcm.c
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*
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* @Brief
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* This file contains the definition of the pcm device functions.
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*
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* @Author Liu Chun
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* @Date Apr 2 2008
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*
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*/
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#include "ctpcm.h"
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#include "cttimer.h"
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#include <sound/pcm.h>
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/* Hardware descriptions for playback */
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static struct snd_pcm_hardware ct_pcm_playback_hw = {
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.info = (SNDRV_PCM_INFO_MMAP |
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SNDRV_PCM_INFO_INTERLEAVED |
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SNDRV_PCM_INFO_BLOCK_TRANSFER |
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SNDRV_PCM_INFO_MMAP_VALID |
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SNDRV_PCM_INFO_PAUSE),
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.formats = (SNDRV_PCM_FMTBIT_U8 |
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SNDRV_PCM_FMTBIT_S16_LE |
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SNDRV_PCM_FMTBIT_S24_3LE |
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SNDRV_PCM_FMTBIT_S32_LE |
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SNDRV_PCM_FMTBIT_FLOAT_LE),
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.rates = (SNDRV_PCM_RATE_CONTINUOUS |
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SNDRV_PCM_RATE_8000_192000),
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.rate_min = 8000,
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.rate_max = 192000,
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.channels_min = 1,
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.channels_max = 2,
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.buffer_bytes_max = (128*1024),
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.period_bytes_min = (64),
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.period_bytes_max = (128*1024),
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.periods_min = 2,
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.periods_max = 1024,
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.fifo_size = 0,
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};
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static struct snd_pcm_hardware ct_spdif_passthru_playback_hw = {
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.info = (SNDRV_PCM_INFO_MMAP |
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SNDRV_PCM_INFO_INTERLEAVED |
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SNDRV_PCM_INFO_BLOCK_TRANSFER |
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SNDRV_PCM_INFO_MMAP_VALID |
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SNDRV_PCM_INFO_PAUSE),
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.formats = SNDRV_PCM_FMTBIT_S16_LE,
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.rates = (SNDRV_PCM_RATE_48000 |
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SNDRV_PCM_RATE_44100 |
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SNDRV_PCM_RATE_32000),
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.rate_min = 32000,
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.rate_max = 48000,
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.channels_min = 2,
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.channels_max = 2,
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.buffer_bytes_max = (128*1024),
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.period_bytes_min = (64),
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.period_bytes_max = (128*1024),
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.periods_min = 2,
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.periods_max = 1024,
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.fifo_size = 0,
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};
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/* Hardware descriptions for capture */
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static struct snd_pcm_hardware ct_pcm_capture_hw = {
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.info = (SNDRV_PCM_INFO_MMAP |
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SNDRV_PCM_INFO_INTERLEAVED |
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SNDRV_PCM_INFO_BLOCK_TRANSFER |
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SNDRV_PCM_INFO_PAUSE |
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SNDRV_PCM_INFO_MMAP_VALID),
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.formats = (SNDRV_PCM_FMTBIT_U8 |
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SNDRV_PCM_FMTBIT_S16_LE |
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SNDRV_PCM_FMTBIT_S24_3LE |
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SNDRV_PCM_FMTBIT_S32_LE |
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SNDRV_PCM_FMTBIT_FLOAT_LE),
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.rates = (SNDRV_PCM_RATE_CONTINUOUS |
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SNDRV_PCM_RATE_8000_96000),
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.rate_min = 8000,
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.rate_max = 96000,
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.channels_min = 1,
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.channels_max = 2,
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.buffer_bytes_max = (128*1024),
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.period_bytes_min = (384),
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.period_bytes_max = (64*1024),
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.periods_min = 2,
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.periods_max = 1024,
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.fifo_size = 0,
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};
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static void ct_atc_pcm_interrupt(struct ct_atc_pcm *atc_pcm)
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{
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struct ct_atc_pcm *apcm = atc_pcm;
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if (!apcm->substream)
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return;
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snd_pcm_period_elapsed(apcm->substream);
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}
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static void ct_atc_pcm_free_substream(struct snd_pcm_runtime *runtime)
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{
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struct ct_atc_pcm *apcm = runtime->private_data;
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struct ct_atc *atc = snd_pcm_substream_chip(apcm->substream);
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atc->pcm_release_resources(atc, apcm);
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ct_timer_instance_free(apcm->timer);
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kfree(apcm);
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runtime->private_data = NULL;
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}
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/* pcm playback operations */
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static int ct_pcm_playback_open(struct snd_pcm_substream *substream)
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{
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struct ct_atc *atc = snd_pcm_substream_chip(substream);
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struct snd_pcm_runtime *runtime = substream->runtime;
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struct ct_atc_pcm *apcm;
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int err;
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apcm = kzalloc(sizeof(*apcm), GFP_KERNEL);
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if (!apcm)
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return -ENOMEM;
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apcm->substream = substream;
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apcm->interrupt = ct_atc_pcm_interrupt;
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runtime->private_data = apcm;
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runtime->private_free = ct_atc_pcm_free_substream;
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if (IEC958 == substream->pcm->device) {
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runtime->hw = ct_spdif_passthru_playback_hw;
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atc->spdif_out_passthru(atc, 1);
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} else {
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runtime->hw = ct_pcm_playback_hw;
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if (FRONT == substream->pcm->device)
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runtime->hw.channels_max = 8;
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}
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err = snd_pcm_hw_constraint_integer(runtime,
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SNDRV_PCM_HW_PARAM_PERIODS);
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if (err < 0) {
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kfree(apcm);
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return err;
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}
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err = snd_pcm_hw_constraint_minmax(runtime,
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SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
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1024, UINT_MAX);
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if (err < 0) {
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kfree(apcm);
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return err;
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}
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apcm->timer = ct_timer_instance_new(atc->timer, apcm);
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if (!apcm->timer)
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return -ENOMEM;
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return 0;
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}
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static int ct_pcm_playback_close(struct snd_pcm_substream *substream)
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{
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struct ct_atc *atc = snd_pcm_substream_chip(substream);
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/* TODO: Notify mixer inactive. */
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if (IEC958 == substream->pcm->device)
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atc->spdif_out_passthru(atc, 0);
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/* The ct_atc_pcm object will be freed by runtime->private_free */
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return 0;
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}
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static int ct_pcm_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 ct_atc *atc = snd_pcm_substream_chip(substream);
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struct ct_atc_pcm *apcm = substream->runtime->private_data;
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int err;
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err = snd_pcm_lib_malloc_pages(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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/* clear previous resources */
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atc->pcm_release_resources(atc, apcm);
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return err;
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}
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static int ct_pcm_hw_free(struct snd_pcm_substream *substream)
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{
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struct ct_atc *atc = snd_pcm_substream_chip(substream);
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struct ct_atc_pcm *apcm = substream->runtime->private_data;
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/* clear previous resources */
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atc->pcm_release_resources(atc, apcm);
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/* Free snd-allocated pages */
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return snd_pcm_lib_free_pages(substream);
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}
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static int ct_pcm_playback_prepare(struct snd_pcm_substream *substream)
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{
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int err;
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struct ct_atc *atc = snd_pcm_substream_chip(substream);
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struct snd_pcm_runtime *runtime = substream->runtime;
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struct ct_atc_pcm *apcm = runtime->private_data;
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if (IEC958 == substream->pcm->device)
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err = atc->spdif_passthru_playback_prepare(atc, apcm);
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else
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err = atc->pcm_playback_prepare(atc, apcm);
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if (err < 0) {
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printk(KERN_ERR "ctxfi: Preparing pcm playback failed!!!\n");
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return err;
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}
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return 0;
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}
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static int
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ct_pcm_playback_trigger(struct snd_pcm_substream *substream, int cmd)
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{
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struct ct_atc *atc = snd_pcm_substream_chip(substream);
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struct snd_pcm_runtime *runtime = substream->runtime;
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struct ct_atc_pcm *apcm = runtime->private_data;
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switch (cmd) {
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case SNDRV_PCM_TRIGGER_START:
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case SNDRV_PCM_TRIGGER_RESUME:
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case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
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atc->pcm_playback_start(atc, apcm);
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break;
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case SNDRV_PCM_TRIGGER_STOP:
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case SNDRV_PCM_TRIGGER_SUSPEND:
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case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
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atc->pcm_playback_stop(atc, apcm);
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break;
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default:
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break;
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}
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return 0;
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}
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static snd_pcm_uframes_t
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ct_pcm_playback_pointer(struct snd_pcm_substream *substream)
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{
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unsigned long position;
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struct ct_atc *atc = snd_pcm_substream_chip(substream);
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struct snd_pcm_runtime *runtime = substream->runtime;
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struct ct_atc_pcm *apcm = runtime->private_data;
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/* Read out playback position */
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position = atc->pcm_playback_position(atc, apcm);
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position = bytes_to_frames(runtime, position);
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if (position >= runtime->buffer_size)
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position = 0;
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return position;
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}
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/* pcm capture operations */
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static int ct_pcm_capture_open(struct snd_pcm_substream *substream)
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{
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struct ct_atc *atc = snd_pcm_substream_chip(substream);
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struct snd_pcm_runtime *runtime = substream->runtime;
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struct ct_atc_pcm *apcm;
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int err;
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apcm = kzalloc(sizeof(*apcm), GFP_KERNEL);
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if (!apcm)
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return -ENOMEM;
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apcm->started = 0;
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apcm->substream = substream;
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apcm->interrupt = ct_atc_pcm_interrupt;
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runtime->private_data = apcm;
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runtime->private_free = ct_atc_pcm_free_substream;
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runtime->hw = ct_pcm_capture_hw;
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runtime->hw.rate_max = atc->rsr * atc->msr;
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err = snd_pcm_hw_constraint_integer(runtime,
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SNDRV_PCM_HW_PARAM_PERIODS);
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if (err < 0) {
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kfree(apcm);
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return err;
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}
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err = snd_pcm_hw_constraint_minmax(runtime,
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SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
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1024, UINT_MAX);
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if (err < 0) {
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kfree(apcm);
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return err;
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}
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apcm->timer = ct_timer_instance_new(atc->timer, apcm);
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if (!apcm->timer)
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return -ENOMEM;
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return 0;
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}
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static int ct_pcm_capture_close(struct snd_pcm_substream *substream)
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{
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/* The ct_atc_pcm object will be freed by runtime->private_free */
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/* TODO: Notify mixer inactive. */
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return 0;
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}
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static int ct_pcm_capture_prepare(struct snd_pcm_substream *substream)
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{
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int err;
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struct ct_atc *atc = snd_pcm_substream_chip(substream);
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struct snd_pcm_runtime *runtime = substream->runtime;
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struct ct_atc_pcm *apcm = runtime->private_data;
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err = atc->pcm_capture_prepare(atc, apcm);
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if (err < 0) {
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printk(KERN_ERR "ctxfi: Preparing pcm capture failed!!!\n");
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return err;
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}
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return 0;
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}
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static int
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ct_pcm_capture_trigger(struct snd_pcm_substream *substream, int cmd)
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{
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struct ct_atc *atc = snd_pcm_substream_chip(substream);
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struct snd_pcm_runtime *runtime = substream->runtime;
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struct ct_atc_pcm *apcm = runtime->private_data;
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switch (cmd) {
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case SNDRV_PCM_TRIGGER_START:
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atc->pcm_capture_start(atc, apcm);
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break;
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case SNDRV_PCM_TRIGGER_STOP:
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atc->pcm_capture_stop(atc, apcm);
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break;
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default:
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atc->pcm_capture_stop(atc, apcm);
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break;
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}
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return 0;
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}
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static snd_pcm_uframes_t
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ct_pcm_capture_pointer(struct snd_pcm_substream *substream)
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{
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unsigned long position;
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struct ct_atc *atc = snd_pcm_substream_chip(substream);
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struct snd_pcm_runtime *runtime = substream->runtime;
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struct ct_atc_pcm *apcm = runtime->private_data;
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/* Read out playback position */
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position = atc->pcm_capture_position(atc, apcm);
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position = bytes_to_frames(runtime, position);
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if (position >= runtime->buffer_size)
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position = 0;
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return position;
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}
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/* PCM operators for playback */
|
||
|
|
static struct snd_pcm_ops ct_pcm_playback_ops = {
|
||
|
|
.open = ct_pcm_playback_open,
|
||
|
|
.close = ct_pcm_playback_close,
|
||
|
|
.ioctl = snd_pcm_lib_ioctl,
|
||
|
|
.hw_params = ct_pcm_hw_params,
|
||
|
|
.hw_free = ct_pcm_hw_free,
|
||
|
|
.prepare = ct_pcm_playback_prepare,
|
||
|
|
.trigger = ct_pcm_playback_trigger,
|
||
|
|
.pointer = ct_pcm_playback_pointer,
|
||
|
|
.page = snd_pcm_sgbuf_ops_page,
|
||
|
|
};
|
||
|
|
|
||
|
|
/* PCM operators for capture */
|
||
|
|
static struct snd_pcm_ops ct_pcm_capture_ops = {
|
||
|
|
.open = ct_pcm_capture_open,
|
||
|
|
.close = ct_pcm_capture_close,
|
||
|
|
.ioctl = snd_pcm_lib_ioctl,
|
||
|
|
.hw_params = ct_pcm_hw_params,
|
||
|
|
.hw_free = ct_pcm_hw_free,
|
||
|
|
.prepare = ct_pcm_capture_prepare,
|
||
|
|
.trigger = ct_pcm_capture_trigger,
|
||
|
|
.pointer = ct_pcm_capture_pointer,
|
||
|
|
.page = snd_pcm_sgbuf_ops_page,
|
||
|
|
};
|
||
|
|
|
||
|
|
/* Create ALSA pcm device */
|
||
|
|
int ct_alsa_pcm_create(struct ct_atc *atc,
|
||
|
|
enum CTALSADEVS device,
|
||
|
|
const char *device_name)
|
||
|
|
{
|
||
|
|
struct snd_pcm *pcm;
|
||
|
|
int err;
|
||
|
|
int playback_count, capture_count;
|
||
|
|
|
||
|
|
playback_count = (IEC958 == device) ? 1 : 8;
|
||
|
|
capture_count = (FRONT == device) ? 1 : 0;
|
||
|
|
err = snd_pcm_new(atc->card, "ctxfi", device,
|
||
|
|
playback_count, capture_count, &pcm);
|
||
|
|
if (err < 0) {
|
||
|
|
printk(KERN_ERR "ctxfi: snd_pcm_new failed!! Err=%d\n", err);
|
||
|
|
return err;
|
||
|
|
}
|
||
|
|
|
||
|
|
pcm->private_data = atc;
|
||
|
|
pcm->info_flags = 0;
|
||
|
|
pcm->dev_subclass = SNDRV_PCM_SUBCLASS_GENERIC_MIX;
|
||
|
|
strlcpy(pcm->name, device_name, sizeof(pcm->name));
|
||
|
|
|
||
|
|
snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &ct_pcm_playback_ops);
|
||
|
|
|
||
|
|
if (FRONT == device)
|
||
|
|
snd_pcm_set_ops(pcm,
|
||
|
|
SNDRV_PCM_STREAM_CAPTURE, &ct_pcm_capture_ops);
|
||
|
|
|
||
|
|
snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV_SG,
|
||
|
|
snd_dma_pci_data(atc->pci), 128*1024, 128*1024);
|
||
|
|
|
||
|
|
#ifdef CONFIG_PM
|
||
|
|
atc->pcms[device] = pcm;
|
||
|
|
#endif
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|