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@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@amd.com +// Vijendar Mukunda Vijendar.Mukunda@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