[PATCH v2 08/14] ASoC: amd: add ACP PDM DMA driver dai ops
Alex Deucher
alexdeucher at gmail.com
Mon May 11 23:20:08 CEST 2020
From: Vijendar Mukunda <Vijendar.Mukunda at amd.com>
This patch adds ACP3x PDM DMA driver DAI operations.
Signed-off-by: Vijendar Mukunda <Vijendar.Mukunda at amd.com>
Signed-off-by: Alex Deucher <alexander.deucher at amd.com>
---
v2:
- Defined Macros for delay and counter and corrected dma stop sequence.
sound/soc/amd/renoir/acp3x-pdm-dma.c | 149 +++++++++++++++++++++++++++
sound/soc/amd/renoir/rn_acp3x.h | 9 ++
2 files changed, 158 insertions(+)
diff --git a/sound/soc/amd/renoir/acp3x-pdm-dma.c b/sound/soc/amd/renoir/acp3x-pdm-dma.c
index 8bb03fa5b4a5..fd19b17f553e 100644
--- a/sound/soc/amd/renoir/acp3x-pdm-dma.c
+++ b/sound/soc/amd/renoir/acp3x-pdm-dma.c
@@ -71,6 +71,27 @@ static void init_pdm_ring_buffer(u32 physical_addr,
rn_writel(0x01, acp_base + ACPAXI2AXI_ATU_CTRL);
}
+static void config_pdm_stream_params(unsigned int ch_mask,
+ void __iomem *acp_base)
+{
+ rn_writel(ch_mask, acp_base + ACP_WOV_PDM_NO_OF_CHANNELS);
+ rn_writel(PDM_DECIMATION_FACTOR, acp_base +
+ ACP_WOV_PDM_DECIMATION_FACTOR);
+}
+
+static void enable_pdm_clock(void __iomem *acp_base)
+{
+ u32 pdm_clk_enable, pdm_ctrl;
+
+ pdm_clk_enable = ACP_PDM_CLK_FREQ_MASK;
+ pdm_ctrl = 0x00;
+
+ rn_writel(pdm_clk_enable, acp_base + ACP_WOV_CLK_CTRL);
+ pdm_ctrl = rn_readl(acp_base + ACP_WOV_MISC_CTRL);
+ pdm_ctrl |= ACP_WOV_MISC_CTRL_MASK;
+ rn_writel(pdm_ctrl, acp_base + ACP_WOV_MISC_CTRL);
+}
+
static void enable_pdm_interrupts(void __iomem *acp_base)
{
u32 ext_int_ctrl;
@@ -89,6 +110,77 @@ static void disable_pdm_interrupts(void __iomem *acp_base)
rn_writel(ext_int_ctrl, acp_base + ACP_EXTERNAL_INTR_CNTL);
}
+static bool check_pdm_dma_status(void __iomem *acp_base)
+{
+ bool pdm_dma_status;
+ u32 pdm_enable, pdm_dma_enable;
+
+ pdm_dma_status = false;
+ pdm_enable = rn_readl(acp_base + ACP_WOV_PDM_ENABLE);
+ pdm_dma_enable = rn_readl(acp_base + ACP_WOV_PDM_DMA_ENABLE);
+ if ((pdm_enable & ACP_PDM_ENABLE) && (pdm_dma_enable &
+ ACP_PDM_DMA_EN_STATUS))
+ pdm_dma_status = true;
+ return pdm_dma_status;
+}
+
+static int start_pdm_dma(void __iomem *acp_base)
+{
+ u32 pdm_enable;
+ u32 pdm_dma_enable;
+ int timeout;
+
+ pdm_enable = 0x01;
+ pdm_dma_enable = 0x01;
+
+ enable_pdm_clock(acp_base);
+ rn_writel(pdm_enable, acp_base + ACP_WOV_PDM_ENABLE);
+ rn_writel(pdm_dma_enable, acp_base + ACP_WOV_PDM_DMA_ENABLE);
+ pdm_dma_enable = 0x00;
+ timeout = 0;
+ while (++timeout < ACP_COUNTER) {
+ pdm_dma_enable = rn_readl(acp_base + ACP_WOV_PDM_DMA_ENABLE);
+ if ((pdm_dma_enable & 0x02) == ACP_PDM_DMA_EN_STATUS)
+ return 0;
+ udelay(DELAY_US);
+ }
+ return -ETIMEDOUT;
+}
+
+static int stop_pdm_dma(void __iomem *acp_base)
+{
+ u32 pdm_enable, pdm_dma_enable, pdm_fifo_flush;
+ int timeout;
+
+ pdm_enable = 0x00;
+ pdm_dma_enable = 0x00;
+ pdm_fifo_flush = 0x00;
+
+ pdm_enable = rn_readl(acp_base + ACP_WOV_PDM_ENABLE);
+ pdm_dma_enable = rn_readl(acp_base + ACP_WOV_PDM_DMA_ENABLE);
+ if (pdm_dma_enable & 0x01) {
+ pdm_dma_enable = 0x02;
+ rn_writel(pdm_dma_enable, acp_base + ACP_WOV_PDM_DMA_ENABLE);
+ pdm_dma_enable = 0x00;
+ timeout = 0;
+ while (++timeout < ACP_COUNTER) {
+ pdm_dma_enable = rn_readl(acp_base +
+ ACP_WOV_PDM_DMA_ENABLE);
+ if ((pdm_dma_enable & 0x02) == 0x00)
+ break;
+ udelay(DELAY_US);
+ }
+ if (timeout == ACP_COUNTER)
+ return -ETIMEDOUT;
+ }
+ if (pdm_enable == ACP_PDM_ENABLE) {
+ pdm_enable = ACP_PDM_DISABLE;
+ rn_writel(pdm_enable, acp_base + ACP_WOV_PDM_ENABLE);
+ }
+ rn_writel(0x01, acp_base + ACP_WOV_PDM_FIFO_FLUSH);
+ return 0;
+}
+
static void config_acp_dma(struct pdm_stream_instance *rtd, int direction)
{
u16 page_idx;
@@ -230,6 +322,62 @@ static int acp_pdm_dma_close(struct snd_soc_component *component,
return 0;
}
+static int acp_pdm_dai_hw_params(struct snd_pcm_substream *substream,
+ struct snd_pcm_hw_params *params,
+ struct snd_soc_dai *dai)
+{
+ struct pdm_stream_instance *rtd;
+ unsigned int ch_mask;
+
+ rtd = substream->runtime->private_data;
+ switch (params_channels(params)) {
+ case TWO_CH:
+ default:
+ ch_mask = 0x00;
+ break;
+ }
+ config_pdm_stream_params(ch_mask, rtd->acp_base);
+ return 0;
+}
+
+static int acp_pdm_dai_trigger(struct snd_pcm_substream *substream,
+ int cmd, struct snd_soc_dai *dai)
+{
+ struct pdm_stream_instance *rtd;
+ int ret;
+ bool pdm_status;
+
+ rtd = substream->runtime->private_data;
+ ret = 0;
+ switch (cmd) {
+ case SNDRV_PCM_TRIGGER_START:
+ case SNDRV_PCM_TRIGGER_RESUME:
+ case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
+ rtd->bytescount = acp_pdm_get_byte_count(rtd,
+ substream->stream);
+ pdm_status = check_pdm_dma_status(rtd->acp_base);
+ if (!pdm_status)
+ ret = start_pdm_dma(rtd->acp_base);
+ break;
+ case SNDRV_PCM_TRIGGER_STOP:
+ case SNDRV_PCM_TRIGGER_SUSPEND:
+ case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
+ pdm_status = check_pdm_dma_status(rtd->acp_base);
+ if (pdm_status)
+ ret = stop_pdm_dma(rtd->acp_base);
+ break;
+ default:
+ ret = -EINVAL;
+ break;
+ }
+ return ret;
+}
+
+static struct snd_soc_dai_ops acp_pdm_dai_ops = {
+ .hw_params = acp_pdm_dai_hw_params,
+ .trigger = acp_pdm_dai_trigger,
+};
+
static struct snd_soc_dai_driver acp_pdm_dai_driver = {
.capture = {
.rates = SNDRV_PCM_RATE_48000,
@@ -240,6 +388,7 @@ static struct snd_soc_dai_driver acp_pdm_dai_driver = {
.rate_min = 48000,
.rate_max = 48000,
},
+ .ops = &acp_pdm_dai_ops,
};
static const struct snd_soc_component_driver acp_pdm_component = {
diff --git a/sound/soc/amd/renoir/rn_acp3x.h b/sound/soc/amd/renoir/rn_acp3x.h
index 3536d24374f3..a4f654cf2df0 100644
--- a/sound/soc/amd/renoir/rn_acp3x.h
+++ b/sound/soc/amd/renoir/rn_acp3x.h
@@ -31,6 +31,15 @@
#define PDM_DMA_STAT 0x10
#define PDM_DMA_INTR_MASK 0x10000
#define ACP_ERROR_STAT 29
+#define PDM_DECIMATION_FACTOR 0x2
+#define ACP_PDM_CLK_FREQ_MASK 0x07
+#define ACP_WOV_MISC_CTRL_MASK 0x10
+#define ACP_PDM_ENABLE 0x01
+#define ACP_PDM_DISABLE 0x00
+#define ACP_PDM_DMA_EN_STATUS 0x02
+#define TWO_CH 0x02
+#define DELAY_US 5
+#define ACP_COUNTER 20000
#define ACP_SRAM_PTE_OFFSET 0x02050000
#define PAGE_SIZE_4K_ENABLE 0x2
--
2.25.4
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