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ASoC: amd: add ACP5x pcm dma driver ops
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This patch adds ACP5x PCM driver DMA operations.

Reviewed-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Signed-off-by: Vijendar Mukunda <Vijendar.Mukunda@amd.com>
Link: https://lore.kernel.org/r/20210721180430.11571-8-Vijendar.Mukunda@amd.com
Signed-off-by: Mark Brown <broonie@kernel.org>
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Vijendar Mukunda authored and Mark Brown committed Jul 22, 2021
1 parent fc2c806 commit cab396d
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Showing 2 changed files with 410 additions and 2 deletions.
306 changes: 304 additions & 2 deletions sound/soc/amd/vangogh/acp5x-pcm-dma.c
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Original file line number Diff line number Diff line change
Expand Up @@ -17,8 +17,42 @@

#define DRV_NAME "acp5x_i2s_dma"

static const struct snd_soc_component_driver acp5x_i2s_component = {
.name = DRV_NAME,
static const struct snd_pcm_hardware acp5x_pcm_hardware_playback = {
.info = SNDRV_PCM_INFO_INTERLEAVED |
SNDRV_PCM_INFO_BLOCK_TRANSFER |
SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_MMAP_VALID |
SNDRV_PCM_INFO_PAUSE | SNDRV_PCM_INFO_RESUME,
.formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S8 |
SNDRV_PCM_FMTBIT_U8 | SNDRV_PCM_FMTBIT_S32_LE,
.channels_min = 2,
.channels_max = 2,
.rates = SNDRV_PCM_RATE_8000_96000,
.rate_min = 8000,
.rate_max = 96000,
.buffer_bytes_max = PLAYBACK_MAX_NUM_PERIODS * PLAYBACK_MAX_PERIOD_SIZE,
.period_bytes_min = PLAYBACK_MIN_PERIOD_SIZE,
.period_bytes_max = PLAYBACK_MAX_PERIOD_SIZE,
.periods_min = PLAYBACK_MIN_NUM_PERIODS,
.periods_max = PLAYBACK_MAX_NUM_PERIODS,
};

static const struct snd_pcm_hardware acp5x_pcm_hardware_capture = {
.info = SNDRV_PCM_INFO_INTERLEAVED |
SNDRV_PCM_INFO_BLOCK_TRANSFER |
SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_MMAP_VALID |
SNDRV_PCM_INFO_PAUSE | SNDRV_PCM_INFO_RESUME,
.formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S8 |
SNDRV_PCM_FMTBIT_U8 | SNDRV_PCM_FMTBIT_S32_LE,
.channels_min = 2,
.channels_max = 2,
.rates = SNDRV_PCM_RATE_8000_96000,
.rate_min = 8000,
.rate_max = 96000,
.buffer_bytes_max = CAPTURE_MAX_NUM_PERIODS * CAPTURE_MAX_PERIOD_SIZE,
.period_bytes_min = CAPTURE_MIN_PERIOD_SIZE,
.period_bytes_max = CAPTURE_MAX_PERIOD_SIZE,
.periods_min = CAPTURE_MIN_NUM_PERIODS,
.periods_max = CAPTURE_MAX_NUM_PERIODS,
};

static irqreturn_t i2s_irq_handler(int irq, void *dev_id)
Expand Down Expand Up @@ -65,6 +99,274 @@ static irqreturn_t i2s_irq_handler(int irq, void *dev_id)
return IRQ_NONE;
}

static void config_acp5x_dma(struct i2s_stream_instance *rtd, int direction)
{
u16 page_idx;
u32 low, high, val, acp_fifo_addr, reg_fifo_addr;
u32 reg_dma_size, reg_fifo_size;
dma_addr_t addr;

addr = rtd->dma_addr;
if (direction == SNDRV_PCM_STREAM_PLAYBACK) {
switch (rtd->i2s_instance) {
case I2S_HS_INSTANCE:
val = ACP_SRAM_HS_PB_PTE_OFFSET;
break;
case I2S_SP_INSTANCE:
default:
val = ACP_SRAM_SP_PB_PTE_OFFSET;
}
} else {
switch (rtd->i2s_instance) {
case I2S_HS_INSTANCE:
val = ACP_SRAM_HS_CP_PTE_OFFSET;
break;
case I2S_SP_INSTANCE:
default:
val = ACP_SRAM_SP_CP_PTE_OFFSET;
}
}
/* Group Enable */
acp_writel(ACP_SRAM_PTE_OFFSET | BIT(31), rtd->acp5x_base +
ACPAXI2AXI_ATU_BASE_ADDR_GRP_1);
acp_writel(PAGE_SIZE_4K_ENABLE, rtd->acp5x_base +
ACPAXI2AXI_ATU_PAGE_SIZE_GRP_1);

for (page_idx = 0; page_idx < rtd->num_pages; page_idx++) {
/* Load the low address of page int ACP SRAM through SRBM */
low = lower_32_bits(addr);
high = upper_32_bits(addr);

acp_writel(low, rtd->acp5x_base + ACP_SCRATCH_REG_0 + val);
high |= BIT(31);
acp_writel(high, rtd->acp5x_base + ACP_SCRATCH_REG_0 + val + 4);
/* Move to next physically contiguous page */
val += 8;
addr += PAGE_SIZE;
}

if (direction == SNDRV_PCM_STREAM_PLAYBACK) {
switch (rtd->i2s_instance) {
case I2S_HS_INSTANCE:
reg_dma_size = ACP_HS_TX_DMA_SIZE;
acp_fifo_addr = ACP_SRAM_PTE_OFFSET +
HS_PB_FIFO_ADDR_OFFSET;
reg_fifo_addr = ACP_HS_TX_FIFOADDR;
reg_fifo_size = ACP_HS_TX_FIFOSIZE;
acp_writel(I2S_HS_TX_MEM_WINDOW_START,
rtd->acp5x_base + ACP_HS_TX_RINGBUFADDR);
break;

case I2S_SP_INSTANCE:
default:
reg_dma_size = ACP_I2S_TX_DMA_SIZE;
acp_fifo_addr = ACP_SRAM_PTE_OFFSET +
SP_PB_FIFO_ADDR_OFFSET;
reg_fifo_addr = ACP_I2S_TX_FIFOADDR;
reg_fifo_size = ACP_I2S_TX_FIFOSIZE;
acp_writel(I2S_SP_TX_MEM_WINDOW_START,
rtd->acp5x_base + ACP_I2S_TX_RINGBUFADDR);
}
} else {
switch (rtd->i2s_instance) {
case I2S_HS_INSTANCE:
reg_dma_size = ACP_HS_RX_DMA_SIZE;
acp_fifo_addr = ACP_SRAM_PTE_OFFSET +
HS_CAPT_FIFO_ADDR_OFFSET;
reg_fifo_addr = ACP_HS_RX_FIFOADDR;
reg_fifo_size = ACP_HS_RX_FIFOSIZE;
acp_writel(I2S_HS_RX_MEM_WINDOW_START,
rtd->acp5x_base + ACP_HS_RX_RINGBUFADDR);
break;

case I2S_SP_INSTANCE:
default:
reg_dma_size = ACP_I2S_RX_DMA_SIZE;
acp_fifo_addr = ACP_SRAM_PTE_OFFSET +
SP_CAPT_FIFO_ADDR_OFFSET;
reg_fifo_addr = ACP_I2S_RX_FIFOADDR;
reg_fifo_size = ACP_I2S_RX_FIFOSIZE;
acp_writel(I2S_SP_RX_MEM_WINDOW_START,
rtd->acp5x_base + ACP_I2S_RX_RINGBUFADDR);
}
}
acp_writel(DMA_SIZE, rtd->acp5x_base + reg_dma_size);
acp_writel(acp_fifo_addr, rtd->acp5x_base + reg_fifo_addr);
acp_writel(FIFO_SIZE, rtd->acp5x_base + reg_fifo_size);
acp_writel(BIT(I2S_RX_THRESHOLD) | BIT(HS_RX_THRESHOLD)
| BIT(I2S_TX_THRESHOLD) | BIT(HS_TX_THRESHOLD),
rtd->acp5x_base + ACP_EXTERNAL_INTR_CNTL);
}

static int acp5x_dma_open(struct snd_soc_component *component,
struct snd_pcm_substream *substream)
{
struct snd_pcm_runtime *runtime;
struct snd_soc_pcm_runtime *prtd;
struct i2s_dev_data *adata;
struct i2s_stream_instance *i2s_data;
int ret;

runtime = substream->runtime;
prtd = asoc_substream_to_rtd(substream);
component = snd_soc_rtdcom_lookup(prtd, DRV_NAME);
adata = dev_get_drvdata(component->dev);

i2s_data = kzalloc(sizeof(*i2s_data), GFP_KERNEL);
if (!i2s_data)
return -ENOMEM;

if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
runtime->hw = acp5x_pcm_hardware_playback;
else
runtime->hw = acp5x_pcm_hardware_capture;

ret = snd_pcm_hw_constraint_integer(runtime,
SNDRV_PCM_HW_PARAM_PERIODS);
if (ret < 0) {
dev_err(component->dev, "set integer constraint failed\n");
kfree(i2s_data);
return ret;
}
i2s_data->acp5x_base = adata->acp5x_base;
runtime->private_data = i2s_data;
return ret;
}

static int acp5x_dma_hw_params(struct snd_soc_component *component,
struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params)
{
struct i2s_stream_instance *rtd;
struct snd_soc_pcm_runtime *prtd;
struct snd_soc_card *card;
struct acp5x_platform_info *pinfo;
struct i2s_dev_data *adata;
u64 size;

prtd = asoc_substream_to_rtd(substream);
card = prtd->card;
pinfo = snd_soc_card_get_drvdata(card);
adata = dev_get_drvdata(component->dev);
rtd = substream->runtime->private_data;

if (!rtd)
return -EINVAL;

if (pinfo) {
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
rtd->i2s_instance = pinfo->play_i2s_instance;
switch (rtd->i2s_instance) {
case I2S_HS_INSTANCE:
adata->play_stream = substream;
break;
case I2S_SP_INSTANCE:
default:
adata->i2ssp_play_stream = substream;
}
} else {
rtd->i2s_instance = pinfo->cap_i2s_instance;
switch (rtd->i2s_instance) {
case I2S_HS_INSTANCE:
adata->capture_stream = substream;
break;
case I2S_SP_INSTANCE:
default:
adata->i2ssp_capture_stream = substream;
}
}
} else {
dev_err(component->dev, "pinfo failed\n");
return -EINVAL;
}
size = params_buffer_bytes(params);
rtd->dma_addr = substream->dma_buffer.addr;
rtd->num_pages = (PAGE_ALIGN(size) >> PAGE_SHIFT);
config_acp5x_dma(rtd, substream->stream);
return 0;
}

static snd_pcm_uframes_t acp5x_dma_pointer(struct snd_soc_component *component,
struct snd_pcm_substream *substream)
{
struct i2s_stream_instance *rtd;
u32 pos;
u32 buffersize;
u64 bytescount;

rtd = substream->runtime->private_data;
buffersize = frames_to_bytes(substream->runtime,
substream->runtime->buffer_size);
bytescount = acp_get_byte_count(rtd, substream->stream);
if (bytescount > rtd->bytescount)
bytescount -= rtd->bytescount;
pos = do_div(bytescount, buffersize);
return bytes_to_frames(substream->runtime, pos);
}

static int acp5x_dma_new(struct snd_soc_component *component,
struct snd_soc_pcm_runtime *rtd)
{
struct device *parent = component->dev->parent;

snd_pcm_set_managed_buffer_all(rtd->pcm, SNDRV_DMA_TYPE_DEV,
parent, MIN_BUFFER, MAX_BUFFER);
return 0;
}

static int acp5x_dma_mmap(struct snd_soc_component *component,
struct snd_pcm_substream *substream,
struct vm_area_struct *vma)
{
return snd_pcm_lib_default_mmap(substream, vma);
}

static int acp5x_dma_close(struct snd_soc_component *component,
struct snd_pcm_substream *substream)
{
struct snd_soc_pcm_runtime *prtd;
struct i2s_dev_data *adata;
struct i2s_stream_instance *ins;

prtd = asoc_substream_to_rtd(substream);
component = snd_soc_rtdcom_lookup(prtd, DRV_NAME);
adata = dev_get_drvdata(component->dev);
ins = substream->runtime->private_data;
if (!ins)
return -EINVAL;
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
switch (ins->i2s_instance) {
case I2S_HS_INSTANCE:
adata->play_stream = NULL;
break;
case I2S_SP_INSTANCE:
default:
adata->i2ssp_play_stream = NULL;
}
} else {
switch (ins->i2s_instance) {
case I2S_HS_INSTANCE:
adata->capture_stream = NULL;
break;
case I2S_SP_INSTANCE:
default:
adata->i2ssp_capture_stream = NULL;
}
}
kfree(ins);
return 0;
}

static const struct snd_soc_component_driver acp5x_i2s_component = {
.name = DRV_NAME,
.open = acp5x_dma_open,
.close = acp5x_dma_close,
.hw_params = acp5x_dma_hw_params,
.pointer = acp5x_dma_pointer,
.mmap = acp5x_dma_mmap,
.pcm_construct = acp5x_dma_new,
};

static int acp5x_audio_probe(struct platform_device *pdev)
{
struct resource *res;
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