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ASoC: amd: add acp3x pdm driver dma ops 

This patch adds PDM driver DMA operations.

Signed-off-by: Vijendar Mukunda <Vijendar.Mukunda@amd.com>
Reviewed-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Link: https://lore.kernel.org/r/20200518171704.24999-8-Vijendar.Mukunda@amd.com
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Vijendar Mukunda 2020-05-19 01:16:57 +08:00 committed by Mark Brown
parent b9901654a9
commit 4a767b1d03
No known key found for this signature in database
GPG Key ID: 24D68B725D5487D0
2 changed files with 224 additions and 0 deletions
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195
sound/soc/amd/renoir/acp3x-pdm-dma.c
View File

@ -16,6 +16,25 @@
#define DRV_NAME "acp_rn_pdm_dma"
static const struct snd_pcm_hardware acp_pdm_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_S32_LE,
.channels_min = 2,
.channels_max = 2,
.rates = SNDRV_PCM_RATE_48000,
.rate_min = 48000,
.rate_max = 48000,
.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 pdm_irq_handler(int irq, void *dev_id)
{
struct pdm_dev_data *rn_pdm_data;
@ -41,6 +60,176 @@ static irqreturn_t pdm_irq_handler(int irq, void *dev_id)
return IRQ_NONE;
}
static void init_pdm_ring_buffer(u32 physical_addr,
u32 buffer_size,
u32 watermark_size,
void __iomem *acp_base)
{
rn_writel(physical_addr, acp_base + ACP_WOV_RX_RINGBUFADDR);
rn_writel(buffer_size, acp_base + ACP_WOV_RX_RINGBUFSIZE);
rn_writel(watermark_size, acp_base + ACP_WOV_RX_INTR_WATERMARK_SIZE);
rn_writel(0x01, acp_base + ACPAXI2AXI_ATU_CTRL);
}
static void enable_pdm_interrupts(void __iomem *acp_base)
{
u32 ext_int_ctrl;
ext_int_ctrl = rn_readl(acp_base + ACP_EXTERNAL_INTR_CNTL);
ext_int_ctrl |= PDM_DMA_INTR_MASK;
rn_writel(ext_int_ctrl, acp_base + ACP_EXTERNAL_INTR_CNTL);
}
static void disable_pdm_interrupts(void __iomem *acp_base)
{
u32 ext_int_ctrl;
ext_int_ctrl = rn_readl(acp_base + ACP_EXTERNAL_INTR_CNTL);
ext_int_ctrl |= ~PDM_DMA_INTR_MASK;
rn_writel(ext_int_ctrl, acp_base + ACP_EXTERNAL_INTR_CNTL);
}
static void config_acp_dma(struct pdm_stream_instance *rtd, int direction)
{
u16 page_idx;
u32 low, high, val;
dma_addr_t addr;
addr = rtd->dma_addr;
val = 0;
/* Group Enable */
rn_writel(ACP_SRAM_PTE_OFFSET | BIT(31), rtd->acp_base +
ACPAXI2AXI_ATU_BASE_ADDR_GRP_1);
rn_writel(PAGE_SIZE_4K_ENABLE, rtd->acp_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);
rn_writel(low, rtd->acp_base + ACP_SCRATCH_REG_0 + val);
high |= BIT(31);
rn_writel(high, rtd->acp_base + ACP_SCRATCH_REG_0 + val + 4);
val += 8;
addr += PAGE_SIZE;
}
}
static int acp_pdm_dma_open(struct snd_soc_component *component,
struct snd_pcm_substream *substream)
{
struct snd_pcm_runtime *runtime;
struct pdm_dev_data *adata;
struct pdm_stream_instance *pdm_data;
int ret;
runtime = substream->runtime;
adata = dev_get_drvdata(component->dev);
pdm_data = kzalloc(sizeof(*pdm_data), GFP_KERNEL);
if (!pdm_data)
return -EINVAL;
if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
runtime->hw = acp_pdm_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(pdm_data);
return ret;
}
enable_pdm_interrupts(adata->acp_base);
if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
adata->capture_stream = substream;
pdm_data->acp_base = adata->acp_base;
runtime->private_data = pdm_data;
return ret;
}
static int acp_pdm_dma_hw_params(struct snd_soc_component *component,
struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params)
{
struct pdm_stream_instance *rtd;
size_t size, period_bytes;
rtd = substream->runtime->private_data;
if (!rtd)
return -EINVAL;
size = params_buffer_bytes(params);
period_bytes = params_period_bytes(params);
rtd->dma_addr = substream->dma_buffer.addr;
rtd->num_pages = (PAGE_ALIGN(size) >> PAGE_SHIFT);
config_acp_dma(rtd, substream->stream);
init_pdm_ring_buffer(MEM_WINDOW_START, size, period_bytes,
rtd->acp_base);
return 0;
}
static u64 acp_pdm_get_byte_count(struct pdm_stream_instance *rtd,
int direction)
{
union acp_pdm_dma_count byte_count;
byte_count.bcount.high =
rn_readl(rtd->acp_base +
ACP_WOV_RX_LINEARPOSITIONCNTR_HIGH);
byte_count.bcount.low =
rn_readl(rtd->acp_base +
ACP_WOV_RX_LINEARPOSITIONCNTR_LOW);
return byte_count.bytescount;
}
static snd_pcm_uframes_t acp_pdm_dma_pointer(struct snd_soc_component *comp,
struct snd_pcm_substream *stream)
{
struct pdm_stream_instance *rtd;
u32 pos, buffersize;
u64 bytescount;
rtd = stream->runtime->private_data;
buffersize = frames_to_bytes(stream->runtime,
stream->runtime->buffer_size);
bytescount = acp_pdm_get_byte_count(rtd, stream->stream);
if (bytescount > rtd->bytescount)
bytescount -= rtd->bytescount;
pos = do_div(bytescount, buffersize);
return bytes_to_frames(stream->runtime, pos);
}
static int acp_pdm_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 acp_pdm_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 acp_pdm_dma_close(struct snd_soc_component *component,
struct snd_pcm_substream *substream)
{
struct pdm_dev_data *adata = dev_get_drvdata(component->dev);
disable_pdm_interrupts(adata->acp_base);
adata->capture_stream = NULL;
return 0;
}
static struct snd_soc_dai_driver acp_pdm_dai_driver = {
.capture = {
.rates = SNDRV_PCM_RATE_48000,
@ -55,6 +244,12 @@ static struct snd_soc_dai_driver acp_pdm_dai_driver = {
static const struct snd_soc_component_driver acp_pdm_component = {
.name = DRV_NAME,
.open = acp_pdm_dma_open,
.close = acp_pdm_dma_close,
.hw_params = acp_pdm_dma_hw_params,
.pointer = acp_pdm_dma_pointer,
.mmap = acp_pdm_dma_mmap,
.pcm_construct = acp_pdm_dma_new,
};
static int acp_pdm_audio_probe(struct platform_device *pdev)

29
sound/soc/amd/renoir/rn_acp3x.h
View File

@ -29,13 +29,42 @@
#define ACP_ERROR_MASK 0x20000000
#define ACP_EXT_INTR_STAT_CLEAR_MASK 0xFFFFFFFF
#define PDM_DMA_STAT 0x10
#define PDM_DMA_INTR_MASK 0x10000
#define ACP_ERROR_STAT 29
#define ACP_SRAM_PTE_OFFSET 0x02050000
#define PAGE_SIZE_4K_ENABLE 0x2
#define MEM_WINDOW_START 0x4000000
#define CAPTURE_MIN_NUM_PERIODS 4
#define CAPTURE_MAX_NUM_PERIODS 4
#define CAPTURE_MAX_PERIOD_SIZE 8192
#define CAPTURE_MIN_PERIOD_SIZE 4096
#define MAX_BUFFER (CAPTURE_MAX_PERIOD_SIZE * CAPTURE_MAX_NUM_PERIODS)
#define MIN_BUFFER MAX_BUFFER
struct pdm_dev_data {
u32 pdm_irq;
void __iomem *acp_base;
struct snd_pcm_substream *capture_stream;
};
struct pdm_stream_instance {
u16 num_pages;
u16 channels;
dma_addr_t dma_addr;
u64 bytescount;
void __iomem *acp_base;
};
union acp_pdm_dma_count {
struct {
u32 low;
u32 high;
} bcount;
u64 bytescount;
};
static inline u32 rn_readl(void __iomem *base_addr)
{
return readl(base_addr - ACP_PHY_BASE_ADDRESS);