Adding upstream version 6.1.76.upstream/6.1.76

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 193 insertions, 0 deletions

diff --git a/sound/soc/amd/acp/acp-pdm.c b/sound/soc/amd/acp/acp-pdm.c
new file mode 100644
index 000000000..f8030b79a
--- /dev/null
+++ b/sound/soc/amd/acp/acp-pdm.c
@@ -0,0 +1,193 @@
+// 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) 2022 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/err.h>
+#include <linux/io.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <sound/pcm_params.h>
+#include <sound/soc.h>
+#include <sound/soc-dai.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
+#define ACP_REGION2_OFFSET	0x02000000
+
+static int acp_dmic_prepare(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 physical_addr, size_dmic, period_bytes;
+	unsigned int dmic_ctrl;
+
+	/* 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);
+
+	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);
+
+	return 0;
+}
+
+static int acp_dmic_dai_trigger(struct snd_pcm_substream *substream,
+				int cmd, struct snd_soc_dai *dai)
+{
+	struct device *dev = dai->component->dev;
+	struct acp_dev_data *adata = dev_get_drvdata(dev);
+	unsigned int dma_enable;
+	int ret = 0;
+
+	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 channels, ch_mask;
+
+	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;
+	stream->reg_offset = ACP_REGION2_OFFSET;
+
+	/* Enable DMIC Interrupts */
+	ext_int_ctrl = readl(ACP_EXTERNAL_INTR_CNTL(adata, 0));
+	ext_int_ctrl |= PDM_DMA_INTR_MASK;
+	writel(ext_int_ctrl, ACP_EXTERNAL_INTR_CNTL(adata, 0));
+
+	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 interrupts */
+	ext_int_ctrl = readl(ACP_EXTERNAL_INTR_CNTL(adata, 0));
+	ext_int_ctrl &= ~PDM_DMA_INTR_MASK;
+	writel(ext_int_ctrl, ACP_EXTERNAL_INTR_CNTL(adata, 0));
+}
+
+const struct snd_soc_dai_ops acp_dmic_dai_ops = {
+	.prepare	= acp_dmic_prepare,
+	.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("Dual BSD/GPL");
+MODULE_ALIAS(DRV_NAME);