[PATCH v2 1/6] ASoC: amd: acp: Add generic support for PDM controller on ACP
Ajit Kumar Pandey
AjitKumar.Pandey at amd.com
Thu Jan 13 17:33:43 CET 2022
Add driver module for PDM controller on ACP IP block. Expose dai
ops to configure ACP_WOV_PDM_BLOCK registers on ACP. Such dai ops
will be used by platform specific driver module to register dmic
related dai with ASoC.
Signed-off-by: Ajit Kumar Pandey <AjitKumar.Pandey at amd.com>
---
sound/soc/amd/acp/Kconfig | 3 +
sound/soc/amd/acp/Makefile | 2 +
sound/soc/amd/acp/acp-pdm.c | 181 +++++++++++++++++++++++++++
sound/soc/amd/acp/amd.h | 9 +-
sound/soc/amd/acp/chip_offset_byte.h | 20 +++
5 files changed, 214 insertions(+), 1 deletion(-)
create mode 100644 sound/soc/amd/acp/acp-pdm.c
diff --git a/sound/soc/amd/acp/Kconfig b/sound/soc/amd/acp/Kconfig
index d5838df3064b..2e6d0259f2e9 100644
--- a/sound/soc/amd/acp/Kconfig
+++ b/sound/soc/amd/acp/Kconfig
@@ -15,6 +15,9 @@ config SND_SOC_AMD_ACP_COMMON
if SND_SOC_AMD_ACP_COMMON
+config SND_SOC_AMD_ACP_PDM
+ tristate
+
config SND_SOC_AMD_ACP_I2S
tristate
diff --git a/sound/soc/amd/acp/Makefile b/sound/soc/amd/acp/Makefile
index 16c144c2965c..66cac95432f6 100644
--- a/sound/soc/amd/acp/Makefile
+++ b/sound/soc/amd/acp/Makefile
@@ -7,6 +7,7 @@
#common acp driver
snd-acp-pcm-objs := acp-platform.o
snd-acp-i2s-objs := acp-i2s.o
+snd-acp-pdm-objs := acp-pdm.o
#platform specific driver
snd-acp-renoir-objs := acp-renoir.o
@@ -18,6 +19,7 @@ snd-acp-sof-mach-objs := acp-sof-mach.o
obj-$(CONFIG_SND_SOC_AMD_ACP_PCM) += snd-acp-pcm.o
obj-$(CONFIG_SND_SOC_AMD_ACP_I2S) += snd-acp-i2s.o
+obj-$(CONFIG_SND_SOC_AMD_ACP_PDM) += snd-acp-pdm.o
obj-$(CONFIG_SND_AMD_ASOC_RENOIR) += snd-acp-renoir.o
diff --git a/sound/soc/amd/acp/acp-pdm.c b/sound/soc/amd/acp/acp-pdm.c
new file mode 100644
index 000000000000..cb9bbd795eee
--- /dev/null
+++ b/sound/soc/amd/acp/acp-pdm.c
@@ -0,0 +1,181 @@
+// SPDX-License-Identifier: (GPL-2.0-only OR BSD-3-Clause)
+//
+// This file is provided under a dual BSD/GPLv2 license. When using or
+// redistributing this file, you may do so under either license.
+//
+// Copyright(c) 2021 Advanced Micro Devices, Inc.
+//
+// Authors: Ajit Kumar Pandey <AjitKumar.Pandey at amd.com>
+// Vijendar Mukunda <Vijendar.Mukunda at amd.com>
+//
+
+/*
+ * Generic Hardware interface for ACP Audio PDM controller
+ */
+
+#include <linux/platform_device.h>
+#include <linux/module.h>
+#include <linux/err.h>
+#include <linux/io.h>
+#include <sound/pcm_params.h>
+#include <sound/soc.h>
+#include <sound/soc-dai.h>
+#include <linux/dma-mapping.h>
+
+#include "amd.h"
+
+#define DRV_NAME "acp-pdm"
+
+#define PDM_DMA_STAT 0x10
+#define PDM_DMA_INTR_MASK 0x10000
+#define PDM_DEC_64 0x2
+#define PDM_CLK_FREQ_MASK 0x07
+#define PDM_MISC_CTRL_MASK 0x10
+#define PDM_ENABLE 0x01
+#define PDM_DISABLE 0x00
+#define DMA_EN_MASK 0x02
+#define DELAY_US 5
+#define PDM_TIMEOUT 1000
+
+static int acp_dmic_dai_trigger(struct snd_pcm_substream *substream,
+ int cmd, struct snd_soc_dai *dai)
+{
+ struct acp_stream *stream = substream->runtime->private_data;
+ struct device *dev = dai->component->dev;
+ struct acp_dev_data *adata = dev_get_drvdata(dev);
+ u32 physical_addr, size_dmic, period_bytes;
+ unsigned int dma_enable;
+ int ret = 0;
+
+ period_bytes = frames_to_bytes(substream->runtime,
+ substream->runtime->period_size);
+ size_dmic = frames_to_bytes(substream->runtime,
+ substream->runtime->buffer_size);
+
+ physical_addr = stream->reg_offset + MEM_WINDOW_START;
+
+ /* Init DMIC Ring buffer */
+ writel(physical_addr, adata->acp_base + ACP_WOV_RX_RINGBUFADDR);
+ writel(size_dmic, adata->acp_base + ACP_WOV_RX_RINGBUFSIZE);
+ writel(period_bytes, adata->acp_base + ACP_WOV_RX_INTR_WATERMARK_SIZE);
+ writel(0x01, adata->acp_base + ACPAXI2AXI_ATU_CTRL);
+
+ switch (cmd) {
+ case SNDRV_PCM_TRIGGER_START:
+ case SNDRV_PCM_TRIGGER_RESUME:
+ case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
+ dma_enable = readl(adata->acp_base + ACP_WOV_PDM_DMA_ENABLE);
+ if (!(dma_enable & DMA_EN_MASK)) {
+ writel(PDM_ENABLE, adata->acp_base + ACP_WOV_PDM_ENABLE);
+ writel(PDM_ENABLE, adata->acp_base + ACP_WOV_PDM_DMA_ENABLE);
+ }
+
+ ret = readl_poll_timeout_atomic(adata->acp_base + ACP_WOV_PDM_DMA_ENABLE,
+ dma_enable, (dma_enable & DMA_EN_MASK),
+ DELAY_US, PDM_TIMEOUT);
+ break;
+ case SNDRV_PCM_TRIGGER_STOP:
+ case SNDRV_PCM_TRIGGER_SUSPEND:
+ case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
+ dma_enable = readl(adata->acp_base + ACP_WOV_PDM_DMA_ENABLE);
+ if ((dma_enable & DMA_EN_MASK)) {
+ writel(PDM_DISABLE, adata->acp_base + ACP_WOV_PDM_ENABLE);
+ writel(PDM_DISABLE, adata->acp_base + ACP_WOV_PDM_DMA_ENABLE);
+
+ }
+
+ ret = readl_poll_timeout_atomic(adata->acp_base + ACP_WOV_PDM_DMA_ENABLE,
+ dma_enable, !(dma_enable & DMA_EN_MASK),
+ DELAY_US, PDM_TIMEOUT);
+ break;
+ default:
+ ret = -EINVAL;
+ break;
+ }
+
+ return ret;
+}
+
+static int acp_dmic_hwparams(struct snd_pcm_substream *substream,
+ struct snd_pcm_hw_params *hwparams, struct snd_soc_dai *dai)
+{
+ struct device *dev = dai->component->dev;
+ struct acp_dev_data *adata = dev_get_drvdata(dev);
+ unsigned int dmic_ctrl, channels, ch_mask;
+
+ /* Enable default DMIC clk */
+ writel(PDM_CLK_FREQ_MASK, adata->acp_base + ACP_WOV_CLK_CTRL);
+ dmic_ctrl = readl(adata->acp_base + ACP_WOV_MISC_CTRL);
+ dmic_ctrl |= PDM_MISC_CTRL_MASK;
+ writel(dmic_ctrl, adata->acp_base + ACP_WOV_MISC_CTRL);
+
+ channels = params_channels(hwparams);
+ switch (channels) {
+ case 2:
+ ch_mask = 0;
+ break;
+ case 4:
+ ch_mask = 1;
+ break;
+ case 6:
+ ch_mask = 2;
+ break;
+ default:
+ dev_err(dev, "Invalid channels %d\n", channels);
+ return -EINVAL;
+ }
+
+ if (params_format(hwparams) != SNDRV_PCM_FORMAT_S32_LE) {
+ dev_err(dai->dev, "Invalid format:%d\n", params_format(hwparams));
+ return -EINVAL;
+ }
+
+ writel(ch_mask, adata->acp_base + ACP_WOV_PDM_NO_OF_CHANNELS);
+ writel(PDM_DEC_64, adata->acp_base + ACP_WOV_PDM_DECIMATION_FACTOR);
+
+ return 0;
+}
+
+static int acp_dmic_dai_startup(struct snd_pcm_substream *substream,
+ struct snd_soc_dai *dai)
+{
+ struct acp_stream *stream = substream->runtime->private_data;
+ struct device *dev = dai->component->dev;
+ struct acp_dev_data *adata = dev_get_drvdata(dev);
+ u32 ext_int_ctrl;
+
+ stream->dai_id = DMIC_INSTANCE;
+ stream->irq_bit = BIT(PDM_DMA_STAT);
+ stream->pte_offset = ACP_SRAM_PDM_PTE_OFFSET;
+
+ /* Enable DMIC Interrupts */
+ ext_int_ctrl = readl(adata->acp_base + ACP_EXTERNAL_INTR_CNTL);
+ ext_int_ctrl |= PDM_DMA_INTR_MASK;
+ writel(ext_int_ctrl, adata->acp_base + ACP_EXTERNAL_INTR_CNTL);
+
+ return 0;
+}
+
+static void acp_dmic_dai_shutdown(struct snd_pcm_substream *substream,
+ struct snd_soc_dai *dai)
+{
+ struct device *dev = dai->component->dev;
+ struct acp_dev_data *adata = dev_get_drvdata(dev);
+ u32 ext_int_ctrl;
+
+ /* Disable DMIC interrrupts */
+ ext_int_ctrl = readl(adata->acp_base + ACP_EXTERNAL_INTR_CNTL);
+ ext_int_ctrl |= ~PDM_DMA_INTR_MASK;
+ writel(ext_int_ctrl, adata->acp_base + ACP_EXTERNAL_INTR_CNTL);
+}
+
+const struct snd_soc_dai_ops acp_dmic_dai_ops = {
+ .hw_params = acp_dmic_hwparams,
+ .trigger = acp_dmic_dai_trigger,
+ .startup = acp_dmic_dai_startup,
+ .shutdown = acp_dmic_dai_shutdown,
+};
+EXPORT_SYMBOL_NS_GPL(acp_dmic_dai_ops, SND_SOC_ACP_COMMON);
+
+MODULE_LICENSE("GPL v2");
+MODULE_ALIAS("platform:"DRV_NAME);
diff --git a/sound/soc/amd/acp/amd.h b/sound/soc/amd/acp/amd.h
index 8eee3d34774b..567355209a5c 100644
--- a/sound/soc/amd/acp/amd.h
+++ b/sound/soc/amd/acp/amd.h
@@ -17,8 +17,9 @@
#define I2S_SP_INSTANCE 0x00
#define I2S_BT_INSTANCE 0x01
+#define DMIC_INSTANCE 0x02
-#define MEM_WINDOW_START 0x4000000
+#define MEM_WINDOW_START 0x4080000
#define ACP_I2S_REG_START 0x1242400
#define ACP_I2S_REG_END 0x1242810
@@ -38,6 +39,7 @@
#define ACP_SRAM_SP_CP_PTE_OFFSET 0x100
#define ACP_SRAM_BT_PB_PTE_OFFSET 0x200
#define ACP_SRAM_BT_CP_PTE_OFFSET 0x300
+#define ACP_SRAM_PDM_PTE_OFFSET 0x400
#define PAGE_SIZE_4K_ENABLE 0x2
#define I2S_SP_TX_MEM_WINDOW_START 0x4000000
@@ -96,6 +98,7 @@ struct acp_dev_data {
};
extern const struct snd_soc_dai_ops asoc_acp_cpu_dai_ops;
+extern const struct snd_soc_dai_ops acp_dmic_dai_ops;
int asoc_acp_i2s_probe(struct snd_soc_dai *dai);
int acp_platform_register(struct device *dev);
@@ -131,6 +134,10 @@ static inline u64 acp_get_byte_count(struct acp_dev_data *adata, int dai_id, int
high = readl(adata->acp_base + ACP_I2S_RX_LINEARPOSITIONCNTR_HIGH);
low = readl(adata->acp_base + ACP_I2S_RX_LINEARPOSITIONCNTR_LOW);
break;
+ case DMIC_INSTANCE:
+ high = readl(adata->acp_base + ACP_WOV_RX_LINEARPOSITIONCNTR_HIGH);
+ low = readl(adata->acp_base + ACP_WOV_RX_LINEARPOSITIONCNTR_LOW);
+ break;
default:
dev_err(adata->dev, "Invalid dai id %x\n", dai_id);
return -EINVAL;
diff --git a/sound/soc/amd/acp/chip_offset_byte.h b/sound/soc/amd/acp/chip_offset_byte.h
index c7f77e975dc7..e38589a142e9 100644
--- a/sound/soc/amd/acp/chip_offset_byte.h
+++ b/sound/soc/amd/acp/chip_offset_byte.h
@@ -73,4 +73,24 @@
#define ACP_BTTDM_ITER 0x280C
#define ACP_BTTDM_TXFRMT 0x2810
+/* Registers from ACP_WOV_PDM block */
+
+#define ACP_WOV_PDM_ENABLE 0x2C04
+#define ACP_WOV_PDM_DMA_ENABLE 0x2C08
+#define ACP_WOV_RX_RINGBUFADDR 0x2C0C
+#define ACP_WOV_RX_RINGBUFSIZE 0x2C10
+#define ACP_WOV_RX_LINKPOSITIONCNTR 0x2C14
+#define ACP_WOV_RX_LINEARPOSITIONCNTR_HIGH 0x2C18
+#define ACP_WOV_RX_LINEARPOSITIONCNTR_LOW 0x2C1C
+#define ACP_WOV_RX_INTR_WATERMARK_SIZE 0x2C20
+#define ACP_WOV_PDM_FIFO_FLUSH 0x2C24
+#define ACP_WOV_PDM_NO_OF_CHANNELS 0x2C28
+#define ACP_WOV_PDM_DECIMATION_FACTOR 0x2C2C
+#define ACP_WOV_PDM_VAD_CTRL 0x2C30
+#define ACP_WOV_BUFFER_STATUS 0x2C58
+#define ACP_WOV_MISC_CTRL 0x2C5C
+#define ACP_WOV_CLK_CTRL 0x2C60
+#define ACP_PDM_VAD_DYNAMIC_CLK_GATING_EN 0x2C64
+#define ACP_WOV_ERROR_STATUS_REGISTER 0x2C68
+
#endif
--
2.25.1
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