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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-11 08:27:49 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-11 08:27:49 +0000
commitace9429bb58fd418f0c81d4c2835699bddf6bde6 (patch)
treeb2d64bc10158fdd5497876388cd68142ca374ed3 /sound/soc/amd/acp/acp-pdm.c
parentInitial commit. (diff)
downloadlinux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.tar.xz
linux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.zip
Adding upstream version 6.6.15.upstream/6.6.15
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'sound/soc/amd/acp/acp-pdm.c')
-rw-r--r--sound/soc/amd/acp/acp-pdm.c182
1 files changed, 182 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 0000000000..f754bf79b5
--- /dev/null
+++ b/sound/soc/amd/acp/acp-pdm.c
@@ -0,0 +1,182 @@
+// 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"
+
+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;
+ }
+
+ adata->ch_mask = ch_mask;
+ 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);