324 lines
8.8 KiB
C
324 lines
8.8 KiB
C
// SPDX-License-Identifier: (GPL-2.0-only OR BSD-3-Clause)
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//
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// Copyright 2021 NXP
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//
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// Author: Daniel Baluta <daniel.baluta@nxp.com>
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#include <sound/soc.h>
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#include <sound/sof.h>
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#include <sound/compress_driver.h>
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#include "sof-audio.h"
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#include "sof-priv.h"
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#include "sof-utils.h"
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static void sof_set_transferred_bytes(struct snd_compr_tstamp *tstamp,
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u64 host_pos, u64 buffer_size)
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{
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u64 prev_pos;
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unsigned int copied;
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div64_u64_rem(tstamp->copied_total, buffer_size, &prev_pos);
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if (host_pos < prev_pos)
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copied = (buffer_size - prev_pos) + host_pos;
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else
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copied = host_pos - prev_pos;
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tstamp->copied_total += copied;
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}
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static void snd_sof_compr_fragment_elapsed_work(struct work_struct *work)
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{
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struct snd_sof_pcm_stream *sps =
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container_of(work, struct snd_sof_pcm_stream,
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period_elapsed_work);
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snd_compr_fragment_elapsed(sps->cstream);
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}
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void snd_sof_compr_init_elapsed_work(struct work_struct *work)
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{
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INIT_WORK(work, snd_sof_compr_fragment_elapsed_work);
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}
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/*
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* sof compr fragment elapse, this could be called in irq thread context
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*/
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void snd_sof_compr_fragment_elapsed(struct snd_compr_stream *cstream)
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{
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struct snd_soc_pcm_runtime *rtd;
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struct snd_compr_runtime *crtd;
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struct snd_soc_component *component;
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struct snd_compr_tstamp *tstamp;
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struct snd_sof_pcm *spcm;
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if (!cstream)
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return;
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rtd = cstream->private_data;
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crtd = cstream->runtime;
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tstamp = crtd->private_data;
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component = snd_soc_rtdcom_lookup(rtd, SOF_AUDIO_PCM_DRV_NAME);
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spcm = snd_sof_find_spcm_dai(component, rtd);
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if (!spcm) {
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dev_err(component->dev,
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"fragment elapsed called for unknown stream!\n");
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return;
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}
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sof_set_transferred_bytes(tstamp, spcm->stream[cstream->direction].posn.host_posn,
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crtd->buffer_size);
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/* use the same workqueue-based solution as for PCM, cf. snd_sof_pcm_elapsed */
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schedule_work(&spcm->stream[cstream->direction].period_elapsed_work);
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}
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static int create_page_table(struct snd_soc_component *component,
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struct snd_compr_stream *cstream,
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unsigned char *dma_area, size_t size)
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{
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struct snd_dma_buffer *dmab = cstream->runtime->dma_buffer_p;
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struct snd_soc_pcm_runtime *rtd = cstream->private_data;
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int dir = cstream->direction;
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struct snd_sof_pcm *spcm;
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spcm = snd_sof_find_spcm_dai(component, rtd);
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if (!spcm)
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return -EINVAL;
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return snd_sof_create_page_table(component->dev, dmab,
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spcm->stream[dir].page_table.area, size);
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}
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static int sof_compr_open(struct snd_soc_component *component,
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struct snd_compr_stream *cstream)
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{
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struct snd_soc_pcm_runtime *rtd = cstream->private_data;
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struct snd_compr_runtime *crtd = cstream->runtime;
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struct snd_compr_tstamp *tstamp;
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struct snd_sof_pcm *spcm;
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int dir;
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tstamp = kzalloc(sizeof(*tstamp), GFP_KERNEL);
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if (!tstamp)
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return -ENOMEM;
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spcm = snd_sof_find_spcm_dai(component, rtd);
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if (!spcm) {
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kfree(tstamp);
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return -EINVAL;
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}
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dir = cstream->direction;
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if (spcm->stream[dir].cstream) {
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kfree(tstamp);
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return -EBUSY;
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}
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spcm->stream[dir].cstream = cstream;
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spcm->stream[dir].posn.host_posn = 0;
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spcm->stream[dir].posn.dai_posn = 0;
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spcm->prepared[dir] = false;
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crtd->private_data = tstamp;
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return 0;
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}
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static int sof_compr_free(struct snd_soc_component *component,
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struct snd_compr_stream *cstream)
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{
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struct snd_sof_dev *sdev = snd_soc_component_get_drvdata(component);
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struct snd_compr_tstamp *tstamp = cstream->runtime->private_data;
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struct snd_soc_pcm_runtime *rtd = cstream->private_data;
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struct sof_ipc_stream stream;
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struct sof_ipc_reply reply;
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struct snd_sof_pcm *spcm;
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int ret = 0;
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spcm = snd_sof_find_spcm_dai(component, rtd);
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if (!spcm)
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return -EINVAL;
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stream.hdr.size = sizeof(stream);
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stream.hdr.cmd = SOF_IPC_GLB_STREAM_MSG | SOF_IPC_STREAM_PCM_FREE;
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stream.comp_id = spcm->stream[cstream->direction].comp_id;
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if (spcm->prepared[cstream->direction]) {
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ret = sof_ipc_tx_message(sdev->ipc, stream.hdr.cmd,
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&stream, sizeof(stream),
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&reply, sizeof(reply));
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if (!ret)
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spcm->prepared[cstream->direction] = false;
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}
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cancel_work_sync(&spcm->stream[cstream->direction].period_elapsed_work);
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spcm->stream[cstream->direction].cstream = NULL;
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kfree(tstamp);
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return ret;
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}
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static int sof_compr_set_params(struct snd_soc_component *component,
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struct snd_compr_stream *cstream, struct snd_compr_params *params)
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{
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struct snd_sof_dev *sdev = snd_soc_component_get_drvdata(component);
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struct snd_soc_pcm_runtime *rtd = cstream->private_data;
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struct snd_compr_runtime *crtd = cstream->runtime;
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struct sof_ipc_pcm_params_reply ipc_params_reply;
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struct snd_compr_tstamp *tstamp;
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struct sof_ipc_pcm_params pcm;
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struct snd_sof_pcm *spcm;
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int ret;
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tstamp = crtd->private_data;
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spcm = snd_sof_find_spcm_dai(component, rtd);
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if (!spcm)
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return -EINVAL;
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cstream->dma_buffer.dev.type = SNDRV_DMA_TYPE_DEV_SG;
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cstream->dma_buffer.dev.dev = sdev->dev;
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ret = snd_compr_malloc_pages(cstream, crtd->buffer_size);
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if (ret < 0)
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return ret;
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ret = create_page_table(component, cstream, crtd->dma_area, crtd->dma_bytes);
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if (ret < 0)
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return ret;
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memset(&pcm, 0, sizeof(pcm));
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pcm.params.buffer.pages = PFN_UP(crtd->dma_bytes);
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pcm.hdr.size = sizeof(pcm);
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pcm.hdr.cmd = SOF_IPC_GLB_STREAM_MSG | SOF_IPC_STREAM_PCM_PARAMS;
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pcm.comp_id = spcm->stream[cstream->direction].comp_id;
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pcm.params.hdr.size = sizeof(pcm.params);
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pcm.params.buffer.phy_addr = spcm->stream[cstream->direction].page_table.addr;
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pcm.params.buffer.size = crtd->dma_bytes;
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pcm.params.direction = cstream->direction;
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pcm.params.channels = params->codec.ch_out;
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pcm.params.rate = params->codec.sample_rate;
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pcm.params.buffer_fmt = SOF_IPC_BUFFER_INTERLEAVED;
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pcm.params.frame_fmt = SOF_IPC_FRAME_S32_LE;
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pcm.params.sample_container_bytes =
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snd_pcm_format_physical_width(SNDRV_PCM_FORMAT_S32) >> 3;
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pcm.params.host_period_bytes = params->buffer.fragment_size;
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ret = sof_ipc_tx_message(sdev->ipc, pcm.hdr.cmd, &pcm, sizeof(pcm),
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&ipc_params_reply, sizeof(ipc_params_reply));
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if (ret < 0) {
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dev_err(component->dev, "error ipc failed\n");
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return ret;
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}
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tstamp->byte_offset = sdev->stream_box.offset + ipc_params_reply.posn_offset;
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tstamp->sampling_rate = params->codec.sample_rate;
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spcm->prepared[cstream->direction] = true;
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return 0;
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}
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static int sof_compr_get_params(struct snd_soc_component *component,
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struct snd_compr_stream *cstream, struct snd_codec *params)
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{
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/* TODO: we don't query the supported codecs for now, if the
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* application asks for an unsupported codec the set_params() will fail.
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*/
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return 0;
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}
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static int sof_compr_trigger(struct snd_soc_component *component,
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struct snd_compr_stream *cstream, int cmd)
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{
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struct snd_sof_dev *sdev = snd_soc_component_get_drvdata(component);
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struct snd_soc_pcm_runtime *rtd = cstream->private_data;
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struct sof_ipc_stream stream;
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struct sof_ipc_reply reply;
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struct snd_sof_pcm *spcm;
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spcm = snd_sof_find_spcm_dai(component, rtd);
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if (!spcm)
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return -EINVAL;
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stream.hdr.size = sizeof(stream);
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stream.hdr.cmd = SOF_IPC_GLB_STREAM_MSG;
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stream.comp_id = spcm->stream[cstream->direction].comp_id;
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switch (cmd) {
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case SNDRV_PCM_TRIGGER_START:
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stream.hdr.cmd |= SOF_IPC_STREAM_TRIG_START;
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break;
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case SNDRV_PCM_TRIGGER_STOP:
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stream.hdr.cmd |= SOF_IPC_STREAM_TRIG_STOP;
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break;
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case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
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stream.hdr.cmd |= SOF_IPC_STREAM_TRIG_PAUSE;
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break;
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case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
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stream.hdr.cmd |= SOF_IPC_STREAM_TRIG_RELEASE;
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break;
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default:
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dev_err(component->dev, "error: unhandled trigger cmd %d\n", cmd);
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break;
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}
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return sof_ipc_tx_message(sdev->ipc, stream.hdr.cmd,
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&stream, sizeof(stream),
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&reply, sizeof(reply));
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}
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static int sof_compr_copy(struct snd_soc_component *component,
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struct snd_compr_stream *cstream,
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char __user *buf, size_t count)
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{
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struct snd_compr_runtime *rtd = cstream->runtime;
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unsigned int offset, n;
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void *ptr;
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int ret;
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if (count > rtd->buffer_size)
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count = rtd->buffer_size;
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div_u64_rem(rtd->total_bytes_available, rtd->buffer_size, &offset);
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ptr = rtd->dma_area + offset;
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n = rtd->buffer_size - offset;
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if (count < n) {
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ret = copy_from_user(ptr, buf, count);
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} else {
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ret = copy_from_user(ptr, buf, n);
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ret += copy_from_user(rtd->dma_area, buf + n, count - n);
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}
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return count - ret;
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}
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static int sof_compr_pointer(struct snd_soc_component *component,
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struct snd_compr_stream *cstream,
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struct snd_compr_tstamp *tstamp)
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{
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struct snd_compr_tstamp *pstamp = cstream->runtime->private_data;
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tstamp->sampling_rate = pstamp->sampling_rate;
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tstamp->copied_total = pstamp->copied_total;
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return 0;
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}
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struct snd_compress_ops sof_compressed_ops = {
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.open = sof_compr_open,
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.free = sof_compr_free,
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.set_params = sof_compr_set_params,
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.get_params = sof_compr_get_params,
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.trigger = sof_compr_trigger,
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.pointer = sof_compr_pointer,
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.copy = sof_compr_copy,
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};
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EXPORT_SYMBOL(sof_compressed_ops);
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