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340 lines
9.5 KiB
340 lines
9.5 KiB
// SPDX-License-Identifier: (GPL-2.0-only OR BSD-3-Clause) |
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// |
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// This file is provided under a dual BSD/GPLv2 license. When using or |
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// redistributing this file, you may do so under either license. |
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// |
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// Copyright(c) 2021 Advanced Micro Devices, Inc. |
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// |
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// Authors: Ajit Kumar Pandey <[email protected]> |
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// |
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/* |
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* Generic Hardware interface for ACP Audio I2S controller |
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*/ |
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#include <linux/platform_device.h> |
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#include <linux/module.h> |
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#include <linux/err.h> |
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#include <linux/io.h> |
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#include <sound/pcm_params.h> |
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#include <sound/soc.h> |
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#include <sound/soc-dai.h> |
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#include <linux/dma-mapping.h> |
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#include "amd.h" |
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#define DRV_NAME "acp_i2s_playcap" |
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static int acp_i2s_hwparams(struct snd_pcm_substream *substream, struct snd_pcm_hw_params *params, |
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struct snd_soc_dai *dai) |
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{ |
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struct device *dev = dai->component->dev; |
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struct acp_dev_data *adata; |
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u32 val; |
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u32 xfer_resolution; |
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u32 reg_val; |
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adata = snd_soc_dai_get_drvdata(dai); |
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/* These values are as per Hardware Spec */ |
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switch (params_format(params)) { |
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case SNDRV_PCM_FORMAT_U8: |
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case SNDRV_PCM_FORMAT_S8: |
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xfer_resolution = 0x0; |
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break; |
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case SNDRV_PCM_FORMAT_S16_LE: |
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xfer_resolution = 0x02; |
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break; |
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case SNDRV_PCM_FORMAT_S24_LE: |
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xfer_resolution = 0x04; |
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break; |
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case SNDRV_PCM_FORMAT_S32_LE: |
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xfer_resolution = 0x05; |
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break; |
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default: |
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return -EINVAL; |
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} |
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if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { |
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switch (dai->driver->id) { |
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case I2S_BT_INSTANCE: |
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reg_val = ACP_BTTDM_ITER; |
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break; |
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case I2S_SP_INSTANCE: |
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reg_val = ACP_I2STDM_ITER; |
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break; |
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default: |
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dev_err(dev, "Invalid dai id %x\n", dai->driver->id); |
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return -EINVAL; |
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} |
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} else { |
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switch (dai->driver->id) { |
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case I2S_BT_INSTANCE: |
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reg_val = ACP_BTTDM_IRER; |
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break; |
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case I2S_SP_INSTANCE: |
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reg_val = ACP_I2STDM_IRER; |
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break; |
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default: |
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dev_err(dev, "Invalid dai id %x\n", dai->driver->id); |
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return -EINVAL; |
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} |
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} |
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val = readl(adata->acp_base + reg_val); |
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val &= ~ACP3x_ITER_IRER_SAMP_LEN_MASK; |
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val = val | (xfer_resolution << 3); |
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writel(val, adata->acp_base + reg_val); |
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return 0; |
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} |
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static int acp_i2s_trigger(struct snd_pcm_substream *substream, int cmd, struct snd_soc_dai *dai) |
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{ |
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struct acp_stream *stream = substream->runtime->private_data; |
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struct device *dev = dai->component->dev; |
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struct acp_dev_data *adata = dev_get_drvdata(dev); |
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u32 val, period_bytes, reg_val, ier_val, water_val, buf_size, buf_reg; |
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period_bytes = frames_to_bytes(substream->runtime, substream->runtime->period_size); |
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buf_size = frames_to_bytes(substream->runtime, substream->runtime->buffer_size); |
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switch (cmd) { |
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case SNDRV_PCM_TRIGGER_START: |
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case SNDRV_PCM_TRIGGER_RESUME: |
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case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: |
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stream->bytescount = acp_get_byte_count(adata, stream->dai_id, substream->stream); |
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if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { |
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switch (dai->driver->id) { |
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case I2S_BT_INSTANCE: |
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water_val = ACP_BT_TX_INTR_WATERMARK_SIZE; |
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reg_val = ACP_BTTDM_ITER; |
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ier_val = ACP_BTTDM_IER; |
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buf_reg = ACP_BT_TX_RINGBUFSIZE; |
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break; |
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case I2S_SP_INSTANCE: |
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water_val = ACP_I2S_TX_INTR_WATERMARK_SIZE; |
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reg_val = ACP_I2STDM_ITER; |
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ier_val = ACP_I2STDM_IER; |
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buf_reg = ACP_I2S_TX_RINGBUFSIZE; |
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break; |
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default: |
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dev_err(dev, "Invalid dai id %x\n", dai->driver->id); |
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return -EINVAL; |
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} |
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} else { |
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switch (dai->driver->id) { |
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case I2S_BT_INSTANCE: |
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water_val = ACP_BT_RX_INTR_WATERMARK_SIZE; |
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reg_val = ACP_BTTDM_IRER; |
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ier_val = ACP_BTTDM_IER; |
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buf_reg = ACP_BT_RX_RINGBUFSIZE; |
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break; |
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case I2S_SP_INSTANCE: |
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water_val = ACP_I2S_RX_INTR_WATERMARK_SIZE; |
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reg_val = ACP_I2STDM_IRER; |
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ier_val = ACP_I2STDM_IER; |
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buf_reg = ACP_I2S_RX_RINGBUFSIZE; |
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break; |
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default: |
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dev_err(dev, "Invalid dai id %x\n", dai->driver->id); |
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return -EINVAL; |
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} |
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} |
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writel(period_bytes, adata->acp_base + water_val); |
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writel(buf_size, adata->acp_base + buf_reg); |
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val = readl(adata->acp_base + reg_val); |
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val = val | BIT(0); |
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writel(val, adata->acp_base + reg_val); |
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writel(1, adata->acp_base + ier_val); |
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return 0; |
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case SNDRV_PCM_TRIGGER_STOP: |
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case SNDRV_PCM_TRIGGER_SUSPEND: |
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case SNDRV_PCM_TRIGGER_PAUSE_PUSH: |
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if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { |
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switch (dai->driver->id) { |
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case I2S_BT_INSTANCE: |
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reg_val = ACP_BTTDM_ITER; |
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break; |
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case I2S_SP_INSTANCE: |
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reg_val = ACP_I2STDM_ITER; |
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break; |
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default: |
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dev_err(dev, "Invalid dai id %x\n", dai->driver->id); |
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return -EINVAL; |
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} |
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} else { |
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switch (dai->driver->id) { |
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case I2S_BT_INSTANCE: |
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reg_val = ACP_BTTDM_IRER; |
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break; |
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case I2S_SP_INSTANCE: |
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reg_val = ACP_I2STDM_IRER; |
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break; |
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default: |
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dev_err(dev, "Invalid dai id %x\n", dai->driver->id); |
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return -EINVAL; |
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} |
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} |
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val = readl(adata->acp_base + reg_val); |
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val = val & ~BIT(0); |
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writel(val, adata->acp_base + reg_val); |
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if (!(readl(adata->acp_base + ACP_BTTDM_ITER) & BIT(0)) && |
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!(readl(adata->acp_base + ACP_BTTDM_IRER) & BIT(0))) |
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writel(0, adata->acp_base + ACP_BTTDM_IER); |
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if (!(readl(adata->acp_base + ACP_I2STDM_ITER) & BIT(0)) && |
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!(readl(adata->acp_base + ACP_I2STDM_IRER) & BIT(0))) |
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writel(0, adata->acp_base + ACP_I2STDM_IER); |
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return 0; |
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default: |
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return -EINVAL; |
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} |
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return 0; |
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} |
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static int acp_i2s_prepare(struct snd_pcm_substream *substream, struct snd_soc_dai *dai) |
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{ |
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struct device *dev = dai->component->dev; |
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struct acp_dev_data *adata = dev_get_drvdata(dev); |
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struct acp_stream *stream = substream->runtime->private_data; |
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u32 reg_dma_size = 0, reg_fifo_size = 0, reg_fifo_addr = 0; |
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u32 phy_addr = 0, acp_fifo_addr = 0, ext_int_ctrl; |
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unsigned int dir = substream->stream; |
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switch (dai->driver->id) { |
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case I2S_SP_INSTANCE: |
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if (dir == SNDRV_PCM_STREAM_PLAYBACK) { |
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reg_dma_size = ACP_I2S_TX_DMA_SIZE; |
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acp_fifo_addr = ACP_SRAM_PTE_OFFSET + |
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SP_PB_FIFO_ADDR_OFFSET; |
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reg_fifo_addr = ACP_I2S_TX_FIFOADDR; |
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reg_fifo_size = ACP_I2S_TX_FIFOSIZE; |
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phy_addr = I2S_SP_TX_MEM_WINDOW_START + stream->reg_offset; |
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writel(phy_addr, adata->acp_base + ACP_I2S_TX_RINGBUFADDR); |
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} else { |
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reg_dma_size = ACP_I2S_RX_DMA_SIZE; |
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acp_fifo_addr = ACP_SRAM_PTE_OFFSET + |
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SP_CAPT_FIFO_ADDR_OFFSET; |
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reg_fifo_addr = ACP_I2S_RX_FIFOADDR; |
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reg_fifo_size = ACP_I2S_RX_FIFOSIZE; |
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phy_addr = I2S_SP_RX_MEM_WINDOW_START + stream->reg_offset; |
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writel(phy_addr, adata->acp_base + ACP_I2S_RX_RINGBUFADDR); |
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} |
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break; |
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case I2S_BT_INSTANCE: |
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if (dir == SNDRV_PCM_STREAM_PLAYBACK) { |
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reg_dma_size = ACP_BT_TX_DMA_SIZE; |
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acp_fifo_addr = ACP_SRAM_PTE_OFFSET + |
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BT_PB_FIFO_ADDR_OFFSET; |
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reg_fifo_addr = ACP_BT_TX_FIFOADDR; |
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reg_fifo_size = ACP_BT_TX_FIFOSIZE; |
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phy_addr = I2S_BT_TX_MEM_WINDOW_START + stream->reg_offset; |
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writel(phy_addr, adata->acp_base + ACP_BT_TX_RINGBUFADDR); |
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} else { |
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reg_dma_size = ACP_BT_RX_DMA_SIZE; |
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acp_fifo_addr = ACP_SRAM_PTE_OFFSET + |
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BT_CAPT_FIFO_ADDR_OFFSET; |
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reg_fifo_addr = ACP_BT_RX_FIFOADDR; |
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reg_fifo_size = ACP_BT_RX_FIFOSIZE; |
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phy_addr = I2S_BT_TX_MEM_WINDOW_START + stream->reg_offset; |
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writel(phy_addr, adata->acp_base + ACP_BT_RX_RINGBUFADDR); |
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} |
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break; |
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default: |
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dev_err(dev, "Invalid dai id %x\n", dai->driver->id); |
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return -EINVAL; |
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} |
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writel(DMA_SIZE, adata->acp_base + reg_dma_size); |
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writel(acp_fifo_addr, adata->acp_base + reg_fifo_addr); |
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writel(FIFO_SIZE, adata->acp_base + reg_fifo_size); |
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ext_int_ctrl = readl(adata->acp_base + ACP_EXTERNAL_INTR_CNTL); |
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ext_int_ctrl |= BIT(I2S_RX_THRESHOLD) | BIT(BT_RX_THRESHOLD) |
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| BIT(I2S_TX_THRESHOLD) | BIT(BT_TX_THRESHOLD); |
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writel(ext_int_ctrl, adata->acp_base + ACP_EXTERNAL_INTR_CNTL); |
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return 0; |
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} |
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static int acp_i2s_startup(struct snd_pcm_substream *substream, struct snd_soc_dai *dai) |
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{ |
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struct acp_stream *stream = substream->runtime->private_data; |
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struct device *dev = dai->component->dev; |
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unsigned int dir = substream->stream; |
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unsigned int irq_bit = 0; |
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switch (dai->driver->id) { |
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case I2S_SP_INSTANCE: |
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if (dir == SNDRV_PCM_STREAM_PLAYBACK) { |
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irq_bit = BIT(I2S_TX_THRESHOLD); |
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stream->pte_offset = ACP_SRAM_SP_PB_PTE_OFFSET; |
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stream->fifo_offset = SP_PB_FIFO_ADDR_OFFSET; |
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} else { |
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irq_bit = BIT(I2S_RX_THRESHOLD); |
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stream->pte_offset = ACP_SRAM_SP_CP_PTE_OFFSET; |
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stream->fifo_offset = SP_CAPT_FIFO_ADDR_OFFSET; |
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} |
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break; |
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case I2S_BT_INSTANCE: |
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if (dir == SNDRV_PCM_STREAM_PLAYBACK) { |
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irq_bit = BIT(BT_TX_THRESHOLD); |
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stream->pte_offset = ACP_SRAM_BT_PB_PTE_OFFSET; |
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stream->fifo_offset = BT_PB_FIFO_ADDR_OFFSET; |
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} else { |
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irq_bit = BIT(BT_RX_THRESHOLD); |
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stream->pte_offset = ACP_SRAM_BT_CP_PTE_OFFSET; |
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stream->fifo_offset = BT_CAPT_FIFO_ADDR_OFFSET; |
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} |
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break; |
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default: |
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dev_err(dev, "Invalid dai id %x\n", dai->driver->id); |
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return -EINVAL; |
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} |
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/* Save runtime dai configuration in stream */ |
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stream->id = dai->driver->id + dir; |
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stream->dai_id = dai->driver->id; |
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stream->irq_bit = irq_bit; |
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return 0; |
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} |
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const struct snd_soc_dai_ops asoc_acp_cpu_dai_ops = { |
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.startup = acp_i2s_startup, |
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.hw_params = acp_i2s_hwparams, |
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.prepare = acp_i2s_prepare, |
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.trigger = acp_i2s_trigger, |
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}; |
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EXPORT_SYMBOL_NS_GPL(asoc_acp_cpu_dai_ops, SND_SOC_ACP_COMMON); |
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int asoc_acp_i2s_probe(struct snd_soc_dai *dai) |
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{ |
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struct device *dev = dai->component->dev; |
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struct acp_dev_data *adata = dev_get_drvdata(dev); |
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unsigned int val; |
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if (!adata->acp_base) { |
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dev_err(dev, "I2S base is NULL\n"); |
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return -EINVAL; |
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} |
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val = readl(adata->acp_base + ACP_I2S_PIN_CONFIG); |
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if (val != I2S_MODE) { |
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dev_err(dev, "I2S Mode not supported val %x\n", val); |
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return -EINVAL; |
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} |
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return 0; |
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} |
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EXPORT_SYMBOL_NS_GPL(asoc_acp_i2s_probe, SND_SOC_ACP_COMMON); |
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MODULE_LICENSE("Dual BSD/GPL"); |
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MODULE_ALIAS(DRV_NAME);
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