434 lines
12 KiB
C
434 lines
12 KiB
C
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// SPDX-License-Identifier: GPL-2.0
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//
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// Socionext UniPhier AIO Compress Audio driver.
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//
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// Copyright (c) 2017-2018 Socionext Inc.
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#include <linux/bitfield.h>
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#include <linux/circ_buf.h>
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#include <linux/dma-mapping.h>
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#include <linux/errno.h>
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <sound/core.h>
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#include <sound/pcm.h>
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#include <sound/soc.h>
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#include "aio.h"
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static int uniphier_aio_compr_prepare(struct snd_soc_component *component,
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struct snd_compr_stream *cstream);
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static int uniphier_aio_compr_hw_free(struct snd_soc_component *component,
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struct snd_compr_stream *cstream);
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static int uniphier_aio_comprdma_new(struct snd_soc_pcm_runtime *rtd)
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{
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struct snd_compr *compr = rtd->compr;
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struct device *dev = compr->card->dev;
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struct uniphier_aio *aio = uniphier_priv(asoc_rtd_to_cpu(rtd, 0));
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struct uniphier_aio_sub *sub = &aio->sub[compr->direction];
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size_t size = AUD_RING_SIZE;
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int dma_dir = DMA_FROM_DEVICE, ret;
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ret = dma_set_mask_and_coherent(dev, DMA_BIT_MASK(33));
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if (ret)
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return ret;
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sub->compr_area = kzalloc(size, GFP_KERNEL);
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if (!sub->compr_area)
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return -ENOMEM;
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if (sub->swm->dir == PORT_DIR_OUTPUT)
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dma_dir = DMA_TO_DEVICE;
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sub->compr_addr = dma_map_single(dev, sub->compr_area, size, dma_dir);
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if (dma_mapping_error(dev, sub->compr_addr)) {
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kfree(sub->compr_area);
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sub->compr_area = NULL;
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return -ENOMEM;
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}
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sub->compr_bytes = size;
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return 0;
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}
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static int uniphier_aio_comprdma_free(struct snd_soc_pcm_runtime *rtd)
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{
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struct snd_compr *compr = rtd->compr;
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struct device *dev = compr->card->dev;
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struct uniphier_aio *aio = uniphier_priv(asoc_rtd_to_cpu(rtd, 0));
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struct uniphier_aio_sub *sub = &aio->sub[compr->direction];
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int dma_dir = DMA_FROM_DEVICE;
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if (sub->swm->dir == PORT_DIR_OUTPUT)
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dma_dir = DMA_TO_DEVICE;
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dma_unmap_single(dev, sub->compr_addr, sub->compr_bytes, dma_dir);
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kfree(sub->compr_area);
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sub->compr_area = NULL;
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return 0;
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}
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static int uniphier_aio_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 uniphier_aio *aio = uniphier_priv(asoc_rtd_to_cpu(rtd, 0));
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struct uniphier_aio_sub *sub = &aio->sub[cstream->direction];
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int ret;
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if (sub->cstream)
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return -EBUSY;
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sub->cstream = cstream;
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sub->pass_through = 1;
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sub->use_mmap = false;
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ret = uniphier_aio_comprdma_new(rtd);
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if (ret)
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return ret;
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ret = aio_init(sub);
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if (ret)
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return ret;
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return 0;
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}
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static int uniphier_aio_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_soc_pcm_runtime *rtd = cstream->private_data;
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struct uniphier_aio *aio = uniphier_priv(asoc_rtd_to_cpu(rtd, 0));
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struct uniphier_aio_sub *sub = &aio->sub[cstream->direction];
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int ret;
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ret = uniphier_aio_compr_hw_free(component, cstream);
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if (ret)
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return ret;
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ret = uniphier_aio_comprdma_free(rtd);
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if (ret)
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return ret;
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sub->cstream = NULL;
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return 0;
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}
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static int uniphier_aio_compr_get_params(struct snd_soc_component *component,
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struct snd_compr_stream *cstream,
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struct snd_codec *params)
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{
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struct snd_soc_pcm_runtime *rtd = cstream->private_data;
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struct uniphier_aio *aio = uniphier_priv(asoc_rtd_to_cpu(rtd, 0));
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struct uniphier_aio_sub *sub = &aio->sub[cstream->direction];
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*params = sub->cparams.codec;
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return 0;
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}
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static int uniphier_aio_compr_set_params(struct snd_soc_component *component,
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struct snd_compr_stream *cstream,
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struct snd_compr_params *params)
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{
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struct snd_soc_pcm_runtime *rtd = cstream->private_data;
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struct uniphier_aio *aio = uniphier_priv(asoc_rtd_to_cpu(rtd, 0));
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struct uniphier_aio_sub *sub = &aio->sub[cstream->direction];
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struct device *dev = &aio->chip->pdev->dev;
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if (params->codec.id != SND_AUDIOCODEC_IEC61937) {
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dev_err(dev, "Codec ID is not supported(%d)\n",
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params->codec.id);
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return -EINVAL;
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}
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if (params->codec.profile != SND_AUDIOPROFILE_IEC61937_SPDIF) {
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dev_err(dev, "Codec profile is not supported(%d)\n",
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params->codec.profile);
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return -EINVAL;
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}
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/* IEC frame type will be changed after received valid data */
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sub->iec_pc = IEC61937_PC_AAC;
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sub->cparams = *params;
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sub->setting = 1;
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aio_port_reset(sub);
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aio_src_reset(sub);
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return uniphier_aio_compr_prepare(component, cstream);
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}
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static int uniphier_aio_compr_hw_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_soc_pcm_runtime *rtd = cstream->private_data;
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struct uniphier_aio *aio = uniphier_priv(asoc_rtd_to_cpu(rtd, 0));
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struct uniphier_aio_sub *sub = &aio->sub[cstream->direction];
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sub->setting = 0;
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return 0;
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}
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static int uniphier_aio_compr_prepare(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 *runtime = cstream->runtime;
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struct uniphier_aio *aio = uniphier_priv(asoc_rtd_to_cpu(rtd, 0));
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struct uniphier_aio_sub *sub = &aio->sub[cstream->direction];
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int bytes = runtime->fragment_size;
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unsigned long flags;
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int ret;
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ret = aiodma_ch_set_param(sub);
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if (ret)
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return ret;
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spin_lock_irqsave(&sub->lock, flags);
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ret = aiodma_rb_set_buffer(sub, sub->compr_addr,
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sub->compr_addr + sub->compr_bytes,
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bytes);
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spin_unlock_irqrestore(&sub->lock, flags);
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if (ret)
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return ret;
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ret = aio_port_set_param(sub, sub->pass_through, &sub->params);
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if (ret)
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return ret;
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ret = aio_oport_set_stream_type(sub, sub->iec_pc);
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if (ret)
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return ret;
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aio_port_set_enable(sub, 1);
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ret = aio_if_set_param(sub, sub->pass_through);
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if (ret)
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return ret;
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return 0;
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}
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static int uniphier_aio_compr_trigger(struct snd_soc_component *component,
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struct snd_compr_stream *cstream,
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int cmd)
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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 *runtime = cstream->runtime;
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struct uniphier_aio *aio = uniphier_priv(asoc_rtd_to_cpu(rtd, 0));
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struct uniphier_aio_sub *sub = &aio->sub[cstream->direction];
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struct device *dev = &aio->chip->pdev->dev;
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int bytes = runtime->fragment_size, ret = 0;
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unsigned long flags;
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spin_lock_irqsave(&sub->lock, flags);
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switch (cmd) {
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case SNDRV_PCM_TRIGGER_START:
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aiodma_rb_sync(sub, sub->compr_addr, sub->compr_bytes, bytes);
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aiodma_ch_set_enable(sub, 1);
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sub->running = 1;
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break;
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case SNDRV_PCM_TRIGGER_STOP:
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sub->running = 0;
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aiodma_ch_set_enable(sub, 0);
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break;
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default:
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dev_warn(dev, "Unknown trigger(%d)\n", cmd);
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ret = -EINVAL;
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}
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spin_unlock_irqrestore(&sub->lock, flags);
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return ret;
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}
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static int uniphier_aio_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_soc_pcm_runtime *rtd = cstream->private_data;
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struct snd_compr_runtime *runtime = cstream->runtime;
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struct uniphier_aio *aio = uniphier_priv(asoc_rtd_to_cpu(rtd, 0));
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struct uniphier_aio_sub *sub = &aio->sub[cstream->direction];
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int bytes = runtime->fragment_size;
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unsigned long flags;
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u32 pos;
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spin_lock_irqsave(&sub->lock, flags);
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aiodma_rb_sync(sub, sub->compr_addr, sub->compr_bytes, bytes);
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if (sub->swm->dir == PORT_DIR_OUTPUT) {
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pos = sub->rd_offs;
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/* Size of AIO output format is double of IEC61937 */
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tstamp->copied_total = sub->rd_total / 2;
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} else {
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pos = sub->wr_offs;
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tstamp->copied_total = sub->rd_total;
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}
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tstamp->byte_offset = pos;
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spin_unlock_irqrestore(&sub->lock, flags);
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return 0;
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}
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static int aio_compr_send_to_hw(struct uniphier_aio_sub *sub,
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char __user *buf, size_t dstsize)
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{
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u32 __user *srcbuf = (u32 __user *)buf;
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u32 *dstbuf = (u32 *)(sub->compr_area + sub->wr_offs);
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int src = 0, dst = 0, ret;
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u32 frm, frm_a, frm_b;
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while (dstsize > 0) {
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ret = get_user(frm, srcbuf + src);
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if (ret)
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return ret;
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src++;
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frm_a = frm & 0xffff;
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frm_b = (frm >> 16) & 0xffff;
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if (frm == IEC61937_HEADER_SIGN) {
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frm_a |= 0x01000000;
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/* Next data is Pc and Pd */
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sub->iec_header = true;
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} else {
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u16 pc = be16_to_cpu((__be16)frm_a);
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if (sub->iec_header && sub->iec_pc != pc) {
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/* Force overwrite IEC frame type */
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sub->iec_pc = pc;
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ret = aio_oport_set_stream_type(sub, pc);
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if (ret)
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return ret;
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}
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sub->iec_header = false;
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}
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dstbuf[dst++] = frm_a;
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dstbuf[dst++] = frm_b;
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dstsize -= sizeof(u32) * 2;
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}
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return 0;
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}
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static int uniphier_aio_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_soc_pcm_runtime *rtd = cstream->private_data;
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struct snd_compr_runtime *runtime = cstream->runtime;
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struct device *carddev = rtd->compr->card->dev;
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struct uniphier_aio *aio = uniphier_priv(asoc_rtd_to_cpu(rtd, 0));
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struct uniphier_aio_sub *sub = &aio->sub[cstream->direction];
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size_t cnt = min_t(size_t, count, aio_rb_space_to_end(sub) / 2);
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int bytes = runtime->fragment_size;
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unsigned long flags;
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size_t s;
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int ret;
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if (cnt < sizeof(u32))
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return 0;
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if (sub->swm->dir == PORT_DIR_OUTPUT) {
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dma_addr_t dmapos = sub->compr_addr + sub->wr_offs;
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/* Size of AIO output format is double of IEC61937 */
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s = cnt * 2;
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dma_sync_single_for_cpu(carddev, dmapos, s, DMA_TO_DEVICE);
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ret = aio_compr_send_to_hw(sub, buf, s);
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dma_sync_single_for_device(carddev, dmapos, s, DMA_TO_DEVICE);
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} else {
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dma_addr_t dmapos = sub->compr_addr + sub->rd_offs;
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s = cnt;
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dma_sync_single_for_cpu(carddev, dmapos, s, DMA_FROM_DEVICE);
|
||
|
|
ret = copy_to_user(buf, sub->compr_area + sub->rd_offs, s);
|
||
|
|
dma_sync_single_for_device(carddev, dmapos, s, DMA_FROM_DEVICE);
|
||
|
|
}
|
||
|
|
if (ret)
|
||
|
|
return -EFAULT;
|
||
|
|
|
||
|
|
spin_lock_irqsave(&sub->lock, flags);
|
||
|
|
|
||
|
|
sub->threshold = 2 * bytes;
|
||
|
|
aiodma_rb_set_threshold(sub, sub->compr_bytes, 2 * bytes);
|
||
|
|
|
||
|
|
if (sub->swm->dir == PORT_DIR_OUTPUT) {
|
||
|
|
sub->wr_offs += s;
|
||
|
|
if (sub->wr_offs >= sub->compr_bytes)
|
||
|
|
sub->wr_offs -= sub->compr_bytes;
|
||
|
|
} else {
|
||
|
|
sub->rd_offs += s;
|
||
|
|
if (sub->rd_offs >= sub->compr_bytes)
|
||
|
|
sub->rd_offs -= sub->compr_bytes;
|
||
|
|
}
|
||
|
|
aiodma_rb_sync(sub, sub->compr_addr, sub->compr_bytes, bytes);
|
||
|
|
|
||
|
|
spin_unlock_irqrestore(&sub->lock, flags);
|
||
|
|
|
||
|
|
return cnt;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int uniphier_aio_compr_get_caps(struct snd_soc_component *component,
|
||
|
|
struct snd_compr_stream *cstream,
|
||
|
|
struct snd_compr_caps *caps)
|
||
|
|
{
|
||
|
|
caps->num_codecs = 1;
|
||
|
|
caps->min_fragment_size = AUD_MIN_FRAGMENT_SIZE;
|
||
|
|
caps->max_fragment_size = AUD_MAX_FRAGMENT_SIZE;
|
||
|
|
caps->min_fragments = AUD_MIN_FRAGMENT;
|
||
|
|
caps->max_fragments = AUD_MAX_FRAGMENT;
|
||
|
|
caps->codecs[0] = SND_AUDIOCODEC_IEC61937;
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
static const struct snd_compr_codec_caps caps_iec = {
|
||
|
|
.num_descriptors = 1,
|
||
|
|
.descriptor[0].max_ch = 8,
|
||
|
|
.descriptor[0].num_sample_rates = 0,
|
||
|
|
.descriptor[0].num_bitrates = 0,
|
||
|
|
.descriptor[0].profiles = SND_AUDIOPROFILE_IEC61937_SPDIF,
|
||
|
|
.descriptor[0].modes = SND_AUDIOMODE_IEC_AC3 |
|
||
|
|
SND_AUDIOMODE_IEC_MPEG1 |
|
||
|
|
SND_AUDIOMODE_IEC_MP3 |
|
||
|
|
SND_AUDIOMODE_IEC_DTS,
|
||
|
|
.descriptor[0].formats = 0,
|
||
|
|
};
|
||
|
|
|
||
|
|
static int uniphier_aio_compr_get_codec_caps(struct snd_soc_component *component,
|
||
|
|
struct snd_compr_stream *stream,
|
||
|
|
struct snd_compr_codec_caps *codec)
|
||
|
|
{
|
||
|
|
if (codec->codec == SND_AUDIOCODEC_IEC61937)
|
||
|
|
*codec = caps_iec;
|
||
|
|
else
|
||
|
|
return -EINVAL;
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
const struct snd_compress_ops uniphier_aio_compress_ops = {
|
||
|
|
.open = uniphier_aio_compr_open,
|
||
|
|
.free = uniphier_aio_compr_free,
|
||
|
|
.get_params = uniphier_aio_compr_get_params,
|
||
|
|
.set_params = uniphier_aio_compr_set_params,
|
||
|
|
.trigger = uniphier_aio_compr_trigger,
|
||
|
|
.pointer = uniphier_aio_compr_pointer,
|
||
|
|
.copy = uniphier_aio_compr_copy,
|
||
|
|
.get_caps = uniphier_aio_compr_get_caps,
|
||
|
|
.get_codec_caps = uniphier_aio_compr_get_codec_caps,
|
||
|
|
};
|