240 lines
5.7 KiB
C
240 lines
5.7 KiB
C
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/*
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* dbmdx-i2s.c -- DBMDX I2S interface
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*
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* Copyright (C) 2014 DSP Group
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include <linux/module.h>
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#include <linux/err.h>
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#include <sound/core.h>
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#include <sound/soc.h>
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#include <sound/pcm_params.h>
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static int dbmdx_i2s_set_sysclk(struct snd_soc_dai *dai, int clk_id,
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unsigned int freq, int dir)
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{
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struct snd_soc_codec *codec = dai->codec;
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dev_dbg(codec->dev, "%s\n", __func__);
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return 0;
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}
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static int dbmdx_i2s_set_pll(struct snd_soc_dai *dai, int pll_id,
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int source, unsigned int freq_in,
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unsigned int freq_out)
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{
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struct snd_soc_codec *codec = dai->codec;
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dev_dbg(codec->dev, "%s\n", __func__);
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return 0;
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}
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static int dbmdx_i2s_set_clkdiv(struct snd_soc_dai *dai, int div_id,
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int div)
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{
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struct snd_soc_codec *codec = dai->codec;
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dev_dbg(codec->dev, "%s\n", __func__);
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return 0;
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}
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static int dbmdx_i2s_set_dai_fmt(struct snd_soc_dai *dai, unsigned int fmt)
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{
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struct snd_soc_codec *codec = dai->codec;
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dev_dbg(codec->dev, "%s\n", __func__);
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return 0;
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}
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static int dbmdx_i2s_set_tdm_slot(struct snd_soc_dai *dai,
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unsigned int tx_mask, unsigned int rx_mask,
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int slots, int slot_width)
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{
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struct snd_soc_codec *codec = dai->codec;
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dev_dbg(codec->dev, "%s\n", __func__);
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return 0;
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}
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static int dbmdx_i2s_set_channel_map(struct snd_soc_dai *dai,
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unsigned int tx_num, unsigned int *tx_slot,
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unsigned int rx_num, unsigned int *rx_slot)
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{
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struct snd_soc_codec *codec = dai->codec;
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dev_dbg(codec->dev, "%s\n", __func__);
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return 0;
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}
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static int dbmdx_i2s_set_tristate(struct snd_soc_dai *dai, int tristate)
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{
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struct snd_soc_codec *codec = dai->codec;
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dev_dbg(codec->dev, "%s: dai:%d tristate:%d\n", __func__,
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dai->id, tristate);
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/* TODO might check if dai->id is valid */
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return 0;
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}
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static int dbmdx_i2s_port_mute(struct snd_soc_dai *dai, int mute)
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{
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struct snd_soc_codec *codec = dai->codec;
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dev_dbg(codec->dev, "%s: dai:%d mute:%d\n", __func__,
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dai->id, mute);
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/* TODO might check if dai->id is valid */
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return 0;
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}
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static int dbmdx_i2s_startup(struct snd_pcm_substream *substream,
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struct snd_soc_dai *dai)
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{
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struct snd_soc_codec *codec = dai->codec;
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dev_dbg(codec->dev, "%s: dai:%d\n", __func__, dai->id);
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if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
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dev_dbg(codec->dev, "%s: playback stream\n", __func__);
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else
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dev_dbg(codec->dev, "%s: capture stream\n", __func__);
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return 0;
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}
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static void dbmdx_i2s_shutdown(struct snd_pcm_substream *substream,
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struct snd_soc_dai *dai)
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{
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struct snd_soc_codec *codec = dai->codec;
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dev_dbg(codec->dev, "%s: dai:%d\n", __func__, dai->id);
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if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
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dev_dbg(codec->dev, "%s: playback stream\n", __func__);
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else
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dev_dbg(codec->dev, "%s: capture stream\n", __func__);
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}
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static int dbmdx_i2s_hw_params(struct snd_pcm_substream *substream,
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struct snd_pcm_hw_params *params,
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struct snd_soc_dai *dai)
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{
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struct snd_soc_codec *codec = dai->codec;
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dev_dbg(codec->dev, "%s: dai:%d\n", __func__, dai->id);
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/* TODO might check if dai->id is valid */
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dev_dbg(codec->dev, "%s: params_channels = %d\n", __func__,
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params_channels(params));
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switch (params_channels(params)) {
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case 2:
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break;
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default:
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return -EINVAL;
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}
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dev_dbg(codec->dev, "%s: params_rate = %d\n", __func__,
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params_rate(params));
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switch (params_rate(params)) {
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case 8000:
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case 16000:
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case 48000:
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break;
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default:
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return -EINVAL;
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}
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switch (params_format(params)) {
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case SNDRV_PCM_FORMAT_S16_LE:
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case SNDRV_PCM_FORMAT_S32_LE:
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break;
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default:
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return -EINVAL;
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}
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if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
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dev_dbg(codec->dev, "%s: playback stream\n", __func__);
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else
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dev_dbg(codec->dev, "%s: capture stream\n", __func__);
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return 0;
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}
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static int dbmdx_i2s_hw_free(struct snd_pcm_substream *substream,
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struct snd_soc_dai *dai)
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{
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struct snd_soc_codec *codec = dai->codec;
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dev_dbg(codec->dev, "%s: dai:%d\n", __func__, dai->id);
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if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
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dev_dbg(codec->dev, "%s: playback stream\n", __func__);
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else
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dev_dbg(codec->dev, "%s: capture stream\n", __func__);
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return 0;
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}
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static int dbmdx_i2s_prepare(struct snd_pcm_substream *substream,
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struct snd_soc_dai *dai)
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{
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struct snd_soc_codec *codec = dai->codec;
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dev_dbg(codec->dev, "%s: dai:%d\n", __func__, dai->id);
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if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
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dev_dbg(codec->dev, "%s: playback stream\n", __func__);
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else
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dev_dbg(codec->dev, "%s: capture stream\n", __func__);
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return 0;
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}
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static int dbmdx_i2s_trigger(struct snd_pcm_substream *substream,
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int cmd,
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struct snd_soc_dai *dai)
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{
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struct snd_soc_codec *codec = dai->codec;
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dev_dbg(codec->dev, "%s: dai:%d cmd=%d\n", __func__,
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dai->id, cmd);
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if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
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dev_dbg(codec->dev, "%s: playback stream\n", __func__);
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else
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dev_dbg(codec->dev, "%s: capture stream\n", __func__);
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return 0;
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}
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struct snd_soc_dai_ops dbmdx_i2s_dai_ops = {
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.set_sysclk = dbmdx_i2s_set_sysclk,
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.set_pll = dbmdx_i2s_set_pll,
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.set_clkdiv = dbmdx_i2s_set_clkdiv,
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.set_fmt = dbmdx_i2s_set_dai_fmt,
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.set_tdm_slot = dbmdx_i2s_set_tdm_slot,
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.set_channel_map = dbmdx_i2s_set_channel_map,
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.set_tristate = dbmdx_i2s_set_tristate,
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.digital_mute = dbmdx_i2s_port_mute,
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.startup = dbmdx_i2s_startup,
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.shutdown = dbmdx_i2s_shutdown,
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.hw_params = dbmdx_i2s_hw_params,
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.hw_free = dbmdx_i2s_hw_free,
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.prepare = dbmdx_i2s_prepare,
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.trigger = dbmdx_i2s_trigger,
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};
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EXPORT_SYMBOL(dbmdx_i2s_dai_ops);
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