420 lines
11 KiB
C
420 lines
11 KiB
C
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/*
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* omap-hdmi-audio.c -- OMAP4+ DSS HDMI audio support library
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*
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* Copyright (C) 2014 Texas Instruments Incorporated - http://www.ti.com
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*
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* Author: Jyri Sarha <jsarha@ti.com>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* version 2 as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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*/
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/err.h>
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#include <linux/string.h>
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#include <linux/platform_device.h>
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#include <sound/soc.h>
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#include <sound/pcm_params.h>
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#include <sound/dmaengine_pcm.h>
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#include <uapi/sound/asound.h>
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#include <sound/asoundef.h>
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#include <sound/omap-pcm.h>
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#include <sound/omap-hdmi-audio.h>
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#define DRV_NAME "omap-hdmi-audio"
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struct hdmi_audio_data {
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struct snd_soc_card *card;
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const struct omap_hdmi_audio_ops *ops;
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struct device *dssdev;
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struct snd_dmaengine_dai_dma_data dma_data;
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struct omap_dss_audio dss_audio;
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struct snd_aes_iec958 iec;
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struct snd_cea_861_aud_if cea;
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struct mutex current_stream_lock;
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struct snd_pcm_substream *current_stream;
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};
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static
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struct hdmi_audio_data *card_drvdata_substream(struct snd_pcm_substream *ss)
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{
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struct snd_soc_pcm_runtime *rtd = ss->private_data;
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return snd_soc_card_get_drvdata(rtd->card);
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}
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static void hdmi_dai_abort(struct device *dev)
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{
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struct hdmi_audio_data *ad = dev_get_drvdata(dev);
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mutex_lock(&ad->current_stream_lock);
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if (ad->current_stream && ad->current_stream->runtime &&
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snd_pcm_running(ad->current_stream)) {
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dev_err(dev, "HDMI display disabled, aborting playback\n");
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snd_pcm_stream_lock_irq(ad->current_stream);
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snd_pcm_stop(ad->current_stream, SNDRV_PCM_STATE_DISCONNECTED);
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snd_pcm_stream_unlock_irq(ad->current_stream);
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}
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mutex_unlock(&ad->current_stream_lock);
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}
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static int hdmi_dai_startup(struct snd_pcm_substream *substream,
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struct snd_soc_dai *dai)
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{
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struct hdmi_audio_data *ad = card_drvdata_substream(substream);
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int ret;
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/*
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* Make sure that the period bytes are multiple of the DMA packet size.
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* Largest packet size we use is 32 32-bit words = 128 bytes
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*/
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ret = snd_pcm_hw_constraint_step(substream->runtime, 0,
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SNDRV_PCM_HW_PARAM_PERIOD_BYTES, 128);
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if (ret < 0) {
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dev_err(dai->dev, "Could not apply period constraint: %d\n",
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ret);
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return ret;
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}
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ret = snd_pcm_hw_constraint_step(substream->runtime, 0,
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SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 128);
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if (ret < 0) {
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dev_err(dai->dev, "Could not apply buffer constraint: %d\n",
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ret);
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return ret;
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}
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snd_soc_dai_set_dma_data(dai, substream, &ad->dma_data);
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mutex_lock(&ad->current_stream_lock);
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ad->current_stream = substream;
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mutex_unlock(&ad->current_stream_lock);
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ret = ad->ops->audio_startup(ad->dssdev, hdmi_dai_abort);
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if (ret) {
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mutex_lock(&ad->current_stream_lock);
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ad->current_stream = NULL;
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mutex_unlock(&ad->current_stream_lock);
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}
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return ret;
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}
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static int hdmi_dai_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 hdmi_audio_data *ad = card_drvdata_substream(substream);
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struct snd_aes_iec958 *iec = &ad->iec;
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struct snd_cea_861_aud_if *cea = &ad->cea;
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WARN_ON(ad->current_stream != substream);
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switch (params_format(params)) {
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case SNDRV_PCM_FORMAT_S16_LE:
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ad->dma_data.maxburst = 16;
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break;
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case SNDRV_PCM_FORMAT_S24_LE:
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ad->dma_data.maxburst = 32;
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break;
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default:
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dev_err(dai->dev, "format not supported!\n");
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return -EINVAL;
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}
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ad->dss_audio.iec = iec;
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ad->dss_audio.cea = cea;
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/*
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* fill the IEC-60958 channel status word
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*/
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/* initialize the word bytes */
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memset(iec->status, 0, sizeof(iec->status));
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/* specify IEC-60958-3 (commercial use) */
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iec->status[0] &= ~IEC958_AES0_PROFESSIONAL;
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/* specify that the audio is LPCM*/
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iec->status[0] &= ~IEC958_AES0_NONAUDIO;
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iec->status[0] |= IEC958_AES0_CON_NOT_COPYRIGHT;
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iec->status[0] |= IEC958_AES0_CON_EMPHASIS_NONE;
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iec->status[1] = IEC958_AES1_CON_GENERAL;
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iec->status[2] |= IEC958_AES2_CON_SOURCE_UNSPEC;
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iec->status[2] |= IEC958_AES2_CON_CHANNEL_UNSPEC;
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switch (params_rate(params)) {
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case 32000:
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iec->status[3] |= IEC958_AES3_CON_FS_32000;
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break;
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case 44100:
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iec->status[3] |= IEC958_AES3_CON_FS_44100;
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break;
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case 48000:
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iec->status[3] |= IEC958_AES3_CON_FS_48000;
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break;
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case 88200:
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iec->status[3] |= IEC958_AES3_CON_FS_88200;
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break;
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case 96000:
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iec->status[3] |= IEC958_AES3_CON_FS_96000;
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break;
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case 176400:
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iec->status[3] |= IEC958_AES3_CON_FS_176400;
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break;
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case 192000:
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iec->status[3] |= IEC958_AES3_CON_FS_192000;
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break;
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default:
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dev_err(dai->dev, "rate not supported!\n");
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return -EINVAL;
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}
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/* specify the clock accuracy */
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iec->status[3] |= IEC958_AES3_CON_CLOCK_1000PPM;
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/*
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* specify the word length. The same word length value can mean
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* two different lengths. Hence, we need to specify the maximum
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* word length as well.
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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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iec->status[4] |= IEC958_AES4_CON_WORDLEN_20_16;
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iec->status[4] &= ~IEC958_AES4_CON_MAX_WORDLEN_24;
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break;
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case SNDRV_PCM_FORMAT_S24_LE:
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iec->status[4] |= IEC958_AES4_CON_WORDLEN_24_20;
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iec->status[4] |= IEC958_AES4_CON_MAX_WORDLEN_24;
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break;
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default:
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dev_err(dai->dev, "format not supported!\n");
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return -EINVAL;
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}
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/*
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* Fill the CEA-861 audio infoframe (see spec for details)
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*/
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cea->db1_ct_cc = (params_channels(params) - 1)
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& CEA861_AUDIO_INFOFRAME_DB1CC;
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cea->db1_ct_cc |= CEA861_AUDIO_INFOFRAME_DB1CT_FROM_STREAM;
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cea->db2_sf_ss = CEA861_AUDIO_INFOFRAME_DB2SF_FROM_STREAM;
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cea->db2_sf_ss |= CEA861_AUDIO_INFOFRAME_DB2SS_FROM_STREAM;
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cea->db3 = 0; /* not used, all zeros */
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if (params_channels(params) == 2)
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cea->db4_ca = 0x0;
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else if (params_channels(params) == 6)
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cea->db4_ca = 0xb;
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else
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cea->db4_ca = 0x13;
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if (cea->db4_ca == 0x00)
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cea->db5_dminh_lsv = CEA861_AUDIO_INFOFRAME_DB5_DM_INH_PERMITTED;
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else
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cea->db5_dminh_lsv = CEA861_AUDIO_INFOFRAME_DB5_DM_INH_PROHIBITED;
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/* the expression is trivial but makes clear what we are doing */
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cea->db5_dminh_lsv |= (0 & CEA861_AUDIO_INFOFRAME_DB5_LSV);
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return ad->ops->audio_config(ad->dssdev, &ad->dss_audio);
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}
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static int hdmi_dai_trigger(struct snd_pcm_substream *substream, int cmd,
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struct snd_soc_dai *dai)
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{
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struct hdmi_audio_data *ad = card_drvdata_substream(substream);
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int err = 0;
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WARN_ON(ad->current_stream != substream);
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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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err = ad->ops->audio_start(ad->dssdev);
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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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ad->ops->audio_stop(ad->dssdev);
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break;
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default:
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err = -EINVAL;
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}
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return err;
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}
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static void hdmi_dai_shutdown(struct snd_pcm_substream *substream,
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struct snd_soc_dai *dai)
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{
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struct hdmi_audio_data *ad = card_drvdata_substream(substream);
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WARN_ON(ad->current_stream != substream);
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ad->ops->audio_shutdown(ad->dssdev);
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mutex_lock(&ad->current_stream_lock);
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ad->current_stream = NULL;
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mutex_unlock(&ad->current_stream_lock);
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}
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static const struct snd_soc_dai_ops hdmi_dai_ops = {
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.startup = hdmi_dai_startup,
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.hw_params = hdmi_dai_hw_params,
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.trigger = hdmi_dai_trigger,
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.shutdown = hdmi_dai_shutdown,
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};
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static const struct snd_soc_component_driver omap_hdmi_component = {
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.name = "omapdss_hdmi",
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};
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static struct snd_soc_dai_driver omap5_hdmi_dai = {
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.name = "omap5-hdmi-dai",
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.playback = {
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.channels_min = 2,
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.channels_max = 8,
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.rates = (SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 |
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SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_88200 |
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SNDRV_PCM_RATE_96000 | SNDRV_PCM_RATE_176400 |
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SNDRV_PCM_RATE_192000),
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.formats = SNDRV_PCM_FMTBIT_S16_LE,
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},
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.ops = &hdmi_dai_ops,
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};
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static struct snd_soc_dai_driver omap4_hdmi_dai = {
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.name = "omap4-hdmi-dai",
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.playback = {
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.channels_min = 2,
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.channels_max = 8,
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.rates = (SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 |
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SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_88200 |
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SNDRV_PCM_RATE_96000 | SNDRV_PCM_RATE_176400 |
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SNDRV_PCM_RATE_192000),
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.formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S24_LE,
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},
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.ops = &hdmi_dai_ops,
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};
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static int omap_hdmi_audio_probe(struct platform_device *pdev)
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{
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struct omap_hdmi_audio_pdata *ha = pdev->dev.platform_data;
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struct device *dev = &pdev->dev;
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struct hdmi_audio_data *ad;
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struct snd_soc_dai_driver *dai_drv;
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struct snd_soc_card *card;
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int ret;
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if (!ha) {
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dev_err(dev, "No platform data\n");
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return -EINVAL;
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}
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ad = devm_kzalloc(dev, sizeof(*ad), GFP_KERNEL);
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if (!ad)
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return -ENOMEM;
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ad->dssdev = ha->dev;
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ad->ops = ha->ops;
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ad->dma_data.addr = ha->audio_dma_addr;
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ad->dma_data.filter_data = "audio_tx";
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ad->dma_data.addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
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mutex_init(&ad->current_stream_lock);
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switch (ha->dss_version) {
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case OMAPDSS_VER_OMAP4430_ES1:
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case OMAPDSS_VER_OMAP4430_ES2:
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case OMAPDSS_VER_OMAP4:
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dai_drv = &omap4_hdmi_dai;
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break;
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case OMAPDSS_VER_OMAP5:
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case OMAPDSS_VER_DRA7xx:
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dai_drv = &omap5_hdmi_dai;
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break;
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||
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|
default:
|
||
|
|
return -EINVAL;
|
||
|
|
}
|
||
|
|
ret = snd_soc_register_component(ad->dssdev, &omap_hdmi_component,
|
||
|
|
dai_drv, 1);
|
||
|
|
if (ret)
|
||
|
|
return ret;
|
||
|
|
|
||
|
|
ret = omap_pcm_platform_register(ad->dssdev);
|
||
|
|
if (ret)
|
||
|
|
return ret;
|
||
|
|
|
||
|
|
card = devm_kzalloc(dev, sizeof(*card), GFP_KERNEL);
|
||
|
|
if (!card)
|
||
|
|
return -ENOMEM;
|
||
|
|
|
||
|
|
card->name = devm_kasprintf(dev, GFP_KERNEL,
|
||
|
|
"HDMI %s", dev_name(ad->dssdev));
|
||
|
|
card->owner = THIS_MODULE;
|
||
|
|
card->dai_link =
|
||
|
|
devm_kzalloc(dev, sizeof(*(card->dai_link)), GFP_KERNEL);
|
||
|
|
if (!card->dai_link)
|
||
|
|
return -ENOMEM;
|
||
|
|
card->dai_link->name = card->name;
|
||
|
|
card->dai_link->stream_name = card->name;
|
||
|
|
card->dai_link->cpu_dai_name = dev_name(ad->dssdev);
|
||
|
|
card->dai_link->platform_name = dev_name(ad->dssdev);
|
||
|
|
card->dai_link->codec_name = "snd-soc-dummy";
|
||
|
|
card->dai_link->codec_dai_name = "snd-soc-dummy-dai";
|
||
|
|
card->num_links = 1;
|
||
|
|
card->dev = dev;
|
||
|
|
|
||
|
|
ret = snd_soc_register_card(card);
|
||
|
|
if (ret) {
|
||
|
|
dev_err(dev, "snd_soc_register_card failed (%d)\n", ret);
|
||
|
|
snd_soc_unregister_component(ad->dssdev);
|
||
|
|
return ret;
|
||
|
|
}
|
||
|
|
|
||
|
|
ad->card = card;
|
||
|
|
snd_soc_card_set_drvdata(card, ad);
|
||
|
|
|
||
|
|
dev_set_drvdata(dev, ad);
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int omap_hdmi_audio_remove(struct platform_device *pdev)
|
||
|
|
{
|
||
|
|
struct hdmi_audio_data *ad = platform_get_drvdata(pdev);
|
||
|
|
|
||
|
|
snd_soc_unregister_card(ad->card);
|
||
|
|
snd_soc_unregister_component(ad->dssdev);
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
static struct platform_driver hdmi_audio_driver = {
|
||
|
|
.driver = {
|
||
|
|
.name = DRV_NAME,
|
||
|
|
},
|
||
|
|
.probe = omap_hdmi_audio_probe,
|
||
|
|
.remove = omap_hdmi_audio_remove,
|
||
|
|
};
|
||
|
|
|
||
|
|
module_platform_driver(hdmi_audio_driver);
|
||
|
|
|
||
|
|
MODULE_AUTHOR("Jyri Sarha <jsarha@ti.com>");
|
||
|
|
MODULE_DESCRIPTION("OMAP HDMI Audio Driver");
|
||
|
|
MODULE_LICENSE("GPL");
|
||
|
|
MODULE_ALIAS("platform:" DRV_NAME);
|