#include <linux/bitfield.h>
#include <linux/circ_buf.h>
#include <linux/dma-mapping.h>
#include <linux/errno.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/soc.h>
#include "aio.h"
static int uniphier_aio_compr_prepare(struct snd_soc_component *component,
struct snd_compr_stream *cstream);
static int uniphier_aio_compr_hw_free(struct snd_soc_component *component,
struct snd_compr_stream *cstream);
static int uniphier_aio_comprdma_new(struct snd_soc_pcm_runtime *rtd)
{
struct snd_compr *compr = rtd->compr;
struct device *dev = compr->card->dev;
struct uniphier_aio *aio = uniphier_priv(snd_soc_rtd_to_cpu(rtd, 0));
struct uniphier_aio_sub *sub = &aio->sub[compr->direction];
size_t size = AUD_RING_SIZE;
int dma_dir = DMA_FROM_DEVICE, ret;
ret = dma_set_mask_and_coherent(dev, DMA_BIT_MASK(33));
if (ret)
return ret;
sub->compr_area = kzalloc(size, GFP_KERNEL);
if (!sub->compr_area)
return -ENOMEM;
if (sub->swm->dir == PORT_DIR_OUTPUT)
dma_dir = DMA_TO_DEVICE;
sub->compr_addr = dma_map_single(dev, sub->compr_area, size, dma_dir);
if (dma_mapping_error(dev, sub->compr_addr)) {
kfree(sub->compr_area);
sub->compr_area = NULL;
return -ENOMEM;
}
sub->compr_bytes = size;
return 0;
}
static int uniphier_aio_comprdma_free(struct snd_soc_pcm_runtime *rtd)
{
struct snd_compr *compr = rtd->compr;
struct device *dev = compr->card->dev;
struct uniphier_aio *aio = uniphier_priv(snd_soc_rtd_to_cpu(rtd, 0));
struct uniphier_aio_sub *sub = &aio->sub[compr->direction];
int dma_dir = DMA_FROM_DEVICE;
if (sub->swm->dir == PORT_DIR_OUTPUT)
dma_dir = DMA_TO_DEVICE;
dma_unmap_single(dev, sub->compr_addr, sub->compr_bytes, dma_dir);
kfree(sub->compr_area);
sub->compr_area = NULL;
return 0;
}
static int uniphier_aio_compr_open(struct snd_soc_component *component,
struct snd_compr_stream *cstream)
{
struct snd_soc_pcm_runtime *rtd = cstream->private_data;
struct uniphier_aio *aio = uniphier_priv(snd_soc_rtd_to_cpu(rtd, 0));
struct uniphier_aio_sub *sub = &aio->sub[cstream->direction];
int ret;
if (sub->cstream)
return -EBUSY;
sub->cstream = cstream;
sub->pass_through = 1;
sub->use_mmap = false;
ret = uniphier_aio_comprdma_new(rtd);
if (ret)
return ret;
ret = aio_init(sub);
if (ret)
return ret;
return 0;
}
static int uniphier_aio_compr_free(struct snd_soc_component *component,
struct snd_compr_stream *cstream)
{
struct snd_soc_pcm_runtime *rtd = cstream->private_data;
struct uniphier_aio *aio = uniphier_priv(snd_soc_rtd_to_cpu(rtd, 0));
struct uniphier_aio_sub *sub = &aio->sub[cstream->direction];
int ret;
ret = uniphier_aio_compr_hw_free(component, cstream);
if (ret)
return ret;
ret = uniphier_aio_comprdma_free(rtd);
if (ret)
return ret;
sub->cstream = NULL;
return 0;
}
static int uniphier_aio_compr_get_params(struct snd_soc_component *component,
struct snd_compr_stream *cstream,
struct snd_codec *params)
{
struct snd_soc_pcm_runtime *rtd = cstream->private_data;
struct uniphier_aio *aio = uniphier_priv(snd_soc_rtd_to_cpu(rtd, 0));
struct uniphier_aio_sub *sub = &aio->sub[cstream->direction];
*params = sub->cparams.codec;
return 0;
}
static int uniphier_aio_compr_set_params(struct snd_soc_component *component,
struct snd_compr_stream *cstream,
struct snd_compr_params *params)
{
struct snd_soc_pcm_runtime *rtd = cstream->private_data;
struct uniphier_aio *aio = uniphier_priv(snd_soc_rtd_to_cpu(rtd, 0));
struct uniphier_aio_sub *sub = &aio->sub[cstream->direction];
struct device *dev = &aio->chip->pdev->dev;
if (params->codec.id != SND_AUDIOCODEC_IEC61937) {
dev_err(dev, "Codec ID is not supported(%d)\n",
params->codec.id);
return -EINVAL;
}
if (params->codec.profile != SND_AUDIOPROFILE_IEC61937_SPDIF) {
dev_err(dev, "Codec profile is not supported(%d)\n",
params->codec.profile);
return -EINVAL;
}
sub->iec_pc = IEC61937_PC_AAC;
sub->cparams = *params;
sub->setting = 1;
aio_port_reset(sub);
aio_src_reset(sub);
return uniphier_aio_compr_prepare(component, cstream);
}
static int uniphier_aio_compr_hw_free(struct snd_soc_component *component,
struct snd_compr_stream *cstream)
{
struct snd_soc_pcm_runtime *rtd = cstream->private_data;
struct uniphier_aio *aio = uniphier_priv(snd_soc_rtd_to_cpu(rtd, 0));
struct uniphier_aio_sub *sub = &aio->sub[cstream->direction];
sub->setting = 0;
return 0;
}
static int uniphier_aio_compr_prepare(struct snd_soc_component *component,
struct snd_compr_stream *cstream)
{
struct snd_soc_pcm_runtime *rtd = cstream->private_data;
struct snd_compr_runtime *runtime = cstream->runtime;
struct uniphier_aio *aio = uniphier_priv(snd_soc_rtd_to_cpu(rtd, 0));
struct uniphier_aio_sub *sub = &aio->sub[cstream->direction];
int bytes = runtime->fragment_size;
int ret;
ret = aiodma_ch_set_param(sub);
if (ret)
return ret;
scoped_guard(spinlock_irqsave, &sub->lock)
ret = aiodma_rb_set_buffer(sub, sub->compr_addr,
sub->compr_addr + sub->compr_bytes,
bytes);
if (ret)
return ret;
ret = aio_port_set_param(sub, sub->pass_through, &sub->params);
if (ret)
return ret;
ret = aio_oport_set_stream_type(sub, sub->iec_pc);
if (ret)
return ret;
aio_port_set_enable(sub, 1);
ret = aio_if_set_param(sub, sub->pass_through);
if (ret)
return ret;
return 0;
}
static int uniphier_aio_compr_trigger(struct snd_soc_component *component,
struct snd_compr_stream *cstream,
int cmd)
{
struct snd_soc_pcm_runtime *rtd = cstream->private_data;
struct snd_compr_runtime *runtime = cstream->runtime;
struct uniphier_aio *aio = uniphier_priv(snd_soc_rtd_to_cpu(rtd, 0));
struct uniphier_aio_sub *sub = &aio->sub[cstream->direction];
struct device *dev = &aio->chip->pdev->dev;
int bytes = runtime->fragment_size, ret = 0;
guard(spinlock_irqsave)(&sub->lock);
switch (cmd) {
case SNDRV_PCM_TRIGGER_START:
aiodma_rb_sync(sub, sub->compr_addr, sub->compr_bytes, bytes);
aiodma_ch_set_enable(sub, 1);
sub->running = 1;
break;
case SNDRV_PCM_TRIGGER_STOP:
sub->running = 0;
aiodma_ch_set_enable(sub, 0);
break;
default:
dev_warn(dev, "Unknown trigger(%d)\n", cmd);
ret = -EINVAL;
}
return ret;
}
static int uniphier_aio_compr_pointer(struct snd_soc_component *component,
struct snd_compr_stream *cstream,
struct snd_compr_tstamp64 *tstamp)
{
struct snd_soc_pcm_runtime *rtd = cstream->private_data;
struct snd_compr_runtime *runtime = cstream->runtime;
struct uniphier_aio *aio = uniphier_priv(snd_soc_rtd_to_cpu(rtd, 0));
struct uniphier_aio_sub *sub = &aio->sub[cstream->direction];
int bytes = runtime->fragment_size;
u32 pos;
guard(spinlock_irqsave)(&sub->lock);
aiodma_rb_sync(sub, sub->compr_addr, sub->compr_bytes, bytes);
if (sub->swm->dir == PORT_DIR_OUTPUT) {
pos = sub->rd_offs;
tstamp->copied_total = sub->rd_total / 2;
} else {
pos = sub->wr_offs;
tstamp->copied_total = sub->rd_total;
}
tstamp->byte_offset = pos;
return 0;
}
static int aio_compr_send_to_hw(struct uniphier_aio_sub *sub,
char __user *buf, size_t dstsize)
{
u32 __user *srcbuf = (u32 __user *)buf;
u32 *dstbuf = (u32 *)(sub->compr_area + sub->wr_offs);
int src = 0, dst = 0, ret;
u32 frm, frm_a, frm_b;
while (dstsize > 0) {
ret = get_user(frm, srcbuf + src);
if (ret)
return ret;
src++;
frm_a = frm & 0xffff;
frm_b = (frm >> 16) & 0xffff;
if (frm == IEC61937_HEADER_SIGN) {
frm_a |= 0x01000000;
sub->iec_header = true;
} else {
u16 pc = be16_to_cpu((__be16)frm_a);
if (sub->iec_header && sub->iec_pc != pc) {
sub->iec_pc = pc;
ret = aio_oport_set_stream_type(sub, pc);
if (ret)
return ret;
}
sub->iec_header = false;
}
dstbuf[dst++] = frm_a;
dstbuf[dst++] = frm_b;
dstsize -= sizeof(u32) * 2;
}
return 0;
}
static int uniphier_aio_compr_copy(struct snd_soc_component *component,
struct snd_compr_stream *cstream,
char __user *buf, size_t count)
{
struct snd_soc_pcm_runtime *rtd = cstream->private_data;
struct snd_compr_runtime *runtime = cstream->runtime;
struct device *carddev = rtd->compr->card->dev;
struct uniphier_aio *aio = uniphier_priv(snd_soc_rtd_to_cpu(rtd, 0));
struct uniphier_aio_sub *sub = &aio->sub[cstream->direction];
size_t cnt = min_t(size_t, count, aio_rb_space_to_end(sub) / 2);
int bytes = runtime->fragment_size;
size_t s;
int ret;
if (cnt < sizeof(u32))
return 0;
if (sub->swm->dir == PORT_DIR_OUTPUT) {
dma_addr_t dmapos = sub->compr_addr + sub->wr_offs;
s = cnt * 2;
dma_sync_single_for_cpu(carddev, dmapos, s, DMA_TO_DEVICE);
ret = aio_compr_send_to_hw(sub, buf, s);
dma_sync_single_for_device(carddev, dmapos, s, DMA_TO_DEVICE);
} else {
dma_addr_t dmapos = sub->compr_addr + sub->rd_offs;
s = cnt;
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;
guard(spinlock_irqsave)(&sub->lock);
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);
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,
};
