Asoc: PCM DMA driver should only have dma ops. So Removed all DAI related functionality. Refactoring the PCM DMA diver code. Added new file containing only DAI ops.

Signed-off-by: Ravulapati Vishnu vardhan rao Vishnuvardhanrao.Ravulapati@amd.com --- sound/soc/amd/raven/Makefile | 2 + sound/soc/amd/raven/acp3x-i2s.c | 267 ++++++++++++++++++++++++++++++++++++ sound/soc/amd/raven/acp3x-pcm-dma.c | 232 ++----------------------------- sound/soc/amd/raven/acp3x.h | 42 ++++++ 4 files changed, 325 insertions(+), 218 deletions(-) create mode 100644 sound/soc/amd/raven/acp3x-i2s.c

diff --git a/sound/soc/amd/raven/Makefile b/sound/soc/amd/raven/Makefile index 108d1ac..8eef292 100644 --- a/sound/soc/amd/raven/Makefile +++ b/sound/soc/amd/raven/Makefile @@ -1,6 +1,8 @@ # SPDX-License-Identifier: GPL-2.0+ # Raven Ridge platform Support snd-pci-acp3x-objs := pci-acp3x.o +snd-acp3x-i2s-objs := acp3x-i2s.o snd-acp3x-pcm-dma-objs := acp3x-pcm-dma.o obj-$(CONFIG_SND_SOC_AMD_ACP3x) += snd-pci-acp3x.o +obj-$(CONFIG_SND_SOC_AMD_ACP3x) += snd-acp3x-i2s.o obj-$(CONFIG_SND_SOC_AMD_ACP3x) += snd-acp3x-pcm-dma.o diff --git a/sound/soc/amd/raven/acp3x-i2s.c b/sound/soc/amd/raven/acp3x-i2s.c new file mode 100644 index 0000000..547f497 --- /dev/null +++ b/sound/soc/amd/raven/acp3x-i2s.c @@ -0,0 +1,267 @@ +// SPDX-License-Identifier: GPL-2.0+ +// +// AMD ALSA SoC PCM Driver +// +//Copyright 2016 Advanced Micro Devices, Inc. + +#include <linux/platform_device.h> +#include <linux/module.h> +#include <linux/err.h> +#include <linux/io.h> +#include <linux/pm_runtime.h> +#include <sound/pcm.h> +#include <sound/pcm_params.h> +#include <sound/soc.h> +#include <sound/soc-dai.h> +#include <linux/dma-mapping.h> + +#include "acp3x.h" + +#define DRV_NAME "acp3x-i2s" + +static int acp3x_i2s_set_fmt(struct snd_soc_dai *cpu_dai, unsigned int fmt) +{ + + struct i2s_dev_data *adata = snd_soc_dai_get_drvdata(cpu_dai); + + switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) { + + case SND_SOC_DAIFMT_I2S: + adata->tdm_mode = false; + break; + case SND_SOC_DAIFMT_DSP_A: + adata->tdm_mode = true; + break; + default: + return -EINVAL; + } + + return 0; +} + +static int acp3x_i2s_set_tdm_slot(struct snd_soc_dai *cpu_dai, u32 tx_mask, + u32 rx_mask, int slots, int slot_width) +{ + u32 val; + u16 slot_len; + + struct i2s_dev_data *adata = snd_soc_dai_get_drvdata(cpu_dai); + + /* These values are as per Hardware Spec */ + + switch (slot_width) { + case SLOT_WIDTH_8: + slot_len = 8; + break; + case SLOT_WIDTH_16: + slot_len = 16; + break; + case SLOT_WIDTH_24: + slot_len = 24; + break; + case SLOT_WIDTH_32: + slot_len = 0; + break; + default: + return -EINVAL; + } + + val = rv_readl(adata->acp3x_base + mmACP_BTTDM_ITER); + rv_writel((val | 0x2), adata->acp3x_base + mmACP_BTTDM_ITER); + val = rv_readl(adata->acp3x_base + mmACP_BTTDM_IRER); + rv_writel((val | 0x2), adata->acp3x_base + mmACP_BTTDM_IRER); + + val = (FRM_LEN | (slots << 15) | (slot_len << 18)); + rv_writel(val, adata->acp3x_base + mmACP_BTTDM_TXFRMT); + rv_writel(val, adata->acp3x_base + mmACP_BTTDM_RXFRMT); + + adata->tdm_fmt = val; + return 0; +} + +static int acp3x_i2s_hwparams(struct snd_pcm_substream *substream, + struct snd_pcm_hw_params *params, + struct snd_soc_dai *dai) +{ + u32 val = 0; + struct i2s_stream_instance *rtd = substream->runtime->private_data; + + switch (params_format(params)) { + case SNDRV_PCM_FORMAT_U8: + case SNDRV_PCM_FORMAT_S8: + rtd->xfer_resolution = 0x0; + break; + case SNDRV_PCM_FORMAT_S16_LE: + rtd->xfer_resolution = 0x02; + break; + case SNDRV_PCM_FORMAT_S24_LE: + rtd->xfer_resolution = 0x04; + break; + case SNDRV_PCM_FORMAT_S32_LE: + rtd->xfer_resolution = 0x05; + break; + default: + return -EINVAL; + } + if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { + val = rv_readl(rtd->acp3x_base + mmACP_BTTDM_ITER); + val = val | (rtd->xfer_resolution << 3); + rv_writel(val, rtd->acp3x_base + mmACP_BTTDM_ITER); + } else { + val = rv_readl(rtd->acp3x_base + mmACP_BTTDM_IRER); + val = val | (rtd->xfer_resolution << 3); + rv_writel(val, rtd->acp3x_base + mmACP_BTTDM_IRER); + } + return 0; +} + +static int acp3x_i2s_trigger(struct snd_pcm_substream *substream, + int cmd, struct snd_soc_dai *dai) +{ + int ret = 0; + struct i2s_stream_instance *rtd = substream->runtime->private_data; + u32 val, period_bytes; + + period_bytes = frames_to_bytes(substream->runtime, + substream->runtime->period_size); + switch (cmd) { + case SNDRV_PCM_TRIGGER_START: + case SNDRV_PCM_TRIGGER_RESUME: + case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: + rtd->bytescount = acp_get_byte_count(rtd, + substream->stream); + if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { + rv_writel(period_bytes, rtd->acp3x_base + + mmACP_BT_TX_INTR_WATERMARK_SIZE); + val = rv_readl(rtd->acp3x_base + mmACP_BTTDM_ITER); + val = val | BIT(0); + rv_writel(val, rtd->acp3x_base + mmACP_BTTDM_ITER); + } else { + rv_writel(period_bytes, rtd->acp3x_base + + mmACP_BT_RX_INTR_WATERMARK_SIZE); + val = rv_readl(rtd->acp3x_base + mmACP_BTTDM_IRER); + val = val | BIT(0); + rv_writel(val, rtd->acp3x_base + mmACP_BTTDM_IRER); + } + rv_writel(1, rtd->acp3x_base + mmACP_BTTDM_IER); + break; + case SNDRV_PCM_TRIGGER_STOP: + case SNDRV_PCM_TRIGGER_SUSPEND: + case SNDRV_PCM_TRIGGER_PAUSE_PUSH: + if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { + val = rv_readl(rtd->acp3x_base + mmACP_BTTDM_ITER); + val = val & ~BIT(0); + rv_writel(val, rtd->acp3x_base + mmACP_BTTDM_ITER); + } else { + val = rv_readl(rtd->acp3x_base + mmACP_BTTDM_IRER); + val = val & ~BIT(0); + rv_writel(val, rtd->acp3x_base + mmACP_BTTDM_IRER); + } + rv_writel(0, rtd->acp3x_base + mmACP_BTTDM_IER); + break; + default: + ret = -EINVAL; + break; + } + + return ret; +} + +static struct snd_soc_dai_ops acp3x_i2s_dai_ops = { + .hw_params = acp3x_i2s_hwparams, + .trigger = acp3x_i2s_trigger, + .set_fmt = acp3x_i2s_set_fmt, + .set_tdm_slot = acp3x_i2s_set_tdm_slot, +}; + +static const struct snd_soc_component_driver acp3x_dai_component = { + .name = "acp3x-i2s", +}; + +static struct snd_soc_dai_driver acp3x_i2s_dai = { + .playback = { + .rates = SNDRV_PCM_RATE_8000_96000, + .formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S8 | + SNDRV_PCM_FMTBIT_U8 | + SNDRV_PCM_FMTBIT_S24_LE | + SNDRV_PCM_FMTBIT_S32_LE, + .channels_min = 2, + .channels_max = 8, + + .rate_min = 8000, + .rate_max = 96000, + }, + .capture = { + .rates = SNDRV_PCM_RATE_8000_48000, + .formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S8 | + SNDRV_PCM_FMTBIT_U8 | + SNDRV_PCM_FMTBIT_S24_LE | + SNDRV_PCM_FMTBIT_S32_LE, + .channels_min = 2, + .channels_max = 2, + .rate_min = 8000, + .rate_max = 48000, + }, + .ops = &acp3x_i2s_dai_ops, +}; + + +static int acp3x_dai_probe(struct platform_device *pdev) +{ + int status; + struct resource *res; + struct i2s_dev_data *adata; + + if (!pdev->dev.platform_data) { + dev_err(&pdev->dev, "platform_data not retrieved\n"); + return -ENODEV; + } + + adata = devm_kzalloc(&pdev->dev, sizeof(struct i2s_dev_data), + GFP_KERNEL); + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + if (!res) { + dev_err(&pdev->dev, "IORESOURCE_MEM FAILED\n"); + return -ENODEV; + } + + adata->acp3x_base = devm_ioremap(&pdev->dev, res->start, + resource_size(res)); + if (IS_ERR(adata->acp3x_base)) + return PTR_ERR(adata->acp3x_base); + + adata->i2s_irq = res->start; + dev_set_drvdata(&pdev->dev, adata); + status = devm_snd_soc_register_component(&pdev->dev, + &acp3x_dai_component, + &acp3x_i2s_dai, 1); + if (status) { + dev_err(&pdev->dev, "Fail to register acp i2s dai\n"); + return -ENODEV; + } + + pm_runtime_set_autosuspend_delay(&pdev->dev, 10000); + pm_runtime_use_autosuspend(&pdev->dev); + pm_runtime_enable(&pdev->dev); + return 0; +} + +static int acp3x_dai_remove(struct platform_device *pdev) +{ + pm_runtime_disable(&pdev->dev); + return 0; +} +static struct platform_driver acp3x_dai_driver = { + .probe = acp3x_dai_probe, + .remove = acp3x_dai_remove, + .driver = { + .name = "acp3x_i2s_playcap", + }, +}; + +module_platform_driver(acp3x_dai_driver); + +MODULE_AUTHOR("Vishnuvardhanrao.Ravulapati@amd.com"); +MODULE_DESCRIPTION("AMD ACP 3.x PCM Driver"); +MODULE_LICENSE("GPL v2"); +MODULE_ALIAS("platform:" DRV_NAME); diff --git a/sound/soc/amd/raven/acp3x-pcm-dma.c b/sound/soc/amd/raven/acp3x-pcm-dma.c index 60709e3..f5e4c7b 100644 --- a/sound/soc/amd/raven/acp3x-pcm-dma.c +++ b/sound/soc/amd/raven/acp3x-pcm-dma.c @@ -18,24 +18,6 @@

#define DRV_NAME "acp3x-i2s-audio"

-struct i2s_dev_data { - bool tdm_mode; - unsigned int i2s_irq; - u32 tdm_fmt; - void __iomem *acp3x_base; - struct snd_pcm_substream *play_stream; - struct snd_pcm_substream *capture_stream; -}; - -struct i2s_stream_instance { - u16 num_pages; - u16 channels; - u32 xfer_resolution; - u64 bytescount; - dma_addr_t dma_addr; - void __iomem *acp3x_base; -}; - static const struct snd_pcm_hardware acp3x_pcm_hardware_playback = { .info = SNDRV_PCM_INFO_INTERLEAVED | SNDRV_PCM_INFO_BLOCK_TRANSFER | @@ -279,7 +261,11 @@ static int acp3x_dma_open(struct snd_soc_component *component, struct snd_pcm_substream *substream) { int ret = 0; + struct snd_pcm_runtime *runtime = substream->runtime; + struct snd_soc_pcm_runtime *prtd = substream->private_data; + + component = snd_soc_rtdcom_lookup(prtd, DRV_NAME); struct i2s_dev_data *adata = dev_get_drvdata(component->dev); struct i2s_stream_instance *i2s_data = kzalloc(sizeof(struct i2s_stream_instance), GFP_KERNEL); @@ -312,23 +298,6 @@ static int acp3x_dma_open(struct snd_soc_component *component, return 0; }

-static u64 acp_get_byte_count(struct i2s_stream_instance *rtd, int direction) -{ - u64 byte_count; - - if (direction == SNDRV_PCM_STREAM_PLAYBACK) { - byte_count = rv_readl(rtd->acp3x_base + - mmACP_BT_TX_LINEARPOSITIONCNTR_HIGH); - byte_count |= rv_readl(rtd->acp3x_base + - mmACP_BT_TX_LINEARPOSITIONCNTR_LOW); - } else { - byte_count = rv_readl(rtd->acp3x_base + - mmACP_BT_RX_LINEARPOSITIONCNTR_HIGH); - byte_count |= rv_readl(rtd->acp3x_base + - mmACP_BT_RX_LINEARPOSITIONCNTR_LOW); - } - return byte_count; -}

static int acp3x_dma_hw_params(struct snd_soc_component *component, struct snd_pcm_substream *substream, @@ -380,6 +349,7 @@ static snd_pcm_uframes_t acp3x_dma_pointer(struct snd_soc_component *component, static int acp3x_dma_new(struct snd_soc_component *component, struct snd_soc_pcm_runtime *rtd) { + component = snd_soc_rtdcom_lookup(rtd, DRV_NAME); struct device *parent = component->dev->parent; snd_pcm_lib_preallocate_pages_for_all(rtd->pcm, SNDRV_DMA_TYPE_DEV, parent, MIN_BUFFER, MAX_BUFFER); @@ -402,7 +372,9 @@ static int acp3x_dma_mmap(struct snd_soc_component *component, static int acp3x_dma_close(struct snd_soc_component *component, struct snd_pcm_substream *substream) { + struct snd_soc_pcm_runtime *prtd = substream->private_data; struct i2s_stream_instance *rtd = substream->runtime->private_data; + component = snd_soc_rtdcom_lookup(prtd, DRV_NAME); struct i2s_dev_data *adata = dev_get_drvdata(component->dev);

if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) @@ -419,182 +391,6 @@ static int acp3x_dma_close(struct snd_soc_component *component, return 0; }

-static int acp3x_dai_i2s_set_fmt(struct snd_soc_dai *cpu_dai, unsigned int fmt) -{ - - struct i2s_dev_data *adata = snd_soc_dai_get_drvdata(cpu_dai); - - switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) { - case SND_SOC_DAIFMT_I2S: - adata->tdm_mode = false; - break; - case SND_SOC_DAIFMT_DSP_A: - adata->tdm_mode = true; - break; - default: - return -EINVAL; - } - - return 0; -} - -static int acp3x_dai_set_tdm_slot(struct snd_soc_dai *cpu_dai, u32 tx_mask, - u32 rx_mask, int slots, int slot_width) -{ - u32 val = 0; - u16 slot_len; - - struct i2s_dev_data *adata = snd_soc_dai_get_drvdata(cpu_dai); - - switch (slot_width) { - case SLOT_WIDTH_8: - slot_len = 8; - break; - case SLOT_WIDTH_16: - slot_len = 16; - break; - case SLOT_WIDTH_24: - slot_len = 24; - break; - case SLOT_WIDTH_32: - slot_len = 0; - break; - default: - return -EINVAL; - } - - val = rv_readl(adata->acp3x_base + mmACP_BTTDM_ITER); - rv_writel((val | 0x2), adata->acp3x_base + mmACP_BTTDM_ITER); - val = rv_readl(adata->acp3x_base + mmACP_BTTDM_IRER); - rv_writel((val | 0x2), adata->acp3x_base + mmACP_BTTDM_IRER); - - val = (FRM_LEN | (slots << 15) | (slot_len << 18)); - rv_writel(val, adata->acp3x_base + mmACP_BTTDM_TXFRMT); - rv_writel(val, adata->acp3x_base + mmACP_BTTDM_RXFRMT); - - adata->tdm_fmt = val; - return 0; -} - -static int acp3x_dai_i2s_hwparams(struct snd_pcm_substream *substream, - struct snd_pcm_hw_params *params, - struct snd_soc_dai *dai) -{ - u32 val = 0; - struct i2s_stream_instance *rtd = substream->runtime->private_data; - - switch (params_format(params)) { - case SNDRV_PCM_FORMAT_U8: - case SNDRV_PCM_FORMAT_S8: - rtd->xfer_resolution = 0x0; - break; - case SNDRV_PCM_FORMAT_S16_LE: - rtd->xfer_resolution = 0x02; - break; - case SNDRV_PCM_FORMAT_S24_LE: - rtd->xfer_resolution = 0x04; - break; - case SNDRV_PCM_FORMAT_S32_LE: - rtd->xfer_resolution = 0x05; - break; - default: - return -EINVAL; - } - val = rv_readl(rtd->acp3x_base + mmACP_BTTDM_ITER); - val = val | (rtd->xfer_resolution << 3); - if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) - rv_writel(val, rtd->acp3x_base + mmACP_BTTDM_ITER); - else - rv_writel(val, rtd->acp3x_base + mmACP_BTTDM_IRER); - - return 0; -} - -static int acp3x_dai_i2s_trigger(struct snd_pcm_substream *substream, - int cmd, struct snd_soc_dai *dai) -{ - int ret = 0; - struct i2s_stream_instance *rtd = substream->runtime->private_data; - u32 val, period_bytes; - - period_bytes = frames_to_bytes(substream->runtime, - substream->runtime->period_size); - switch (cmd) { - case SNDRV_PCM_TRIGGER_START: - case SNDRV_PCM_TRIGGER_RESUME: - case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: - rtd->bytescount = acp_get_byte_count(rtd, substream->stream); - if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { - rv_writel(period_bytes, rtd->acp3x_base + - mmACP_BT_TX_INTR_WATERMARK_SIZE); - val = rv_readl(rtd->acp3x_base + mmACP_BTTDM_ITER); - val = val | BIT(0); - rv_writel(val, rtd->acp3x_base + mmACP_BTTDM_ITER); - } else { - rv_writel(period_bytes, rtd->acp3x_base + - mmACP_BT_RX_INTR_WATERMARK_SIZE); - val = rv_readl(rtd->acp3x_base + mmACP_BTTDM_IRER); - val = val | BIT(0); - rv_writel(val, rtd->acp3x_base + mmACP_BTTDM_IRER); - } - rv_writel(1, rtd->acp3x_base + mmACP_BTTDM_IER); - break; - case SNDRV_PCM_TRIGGER_STOP: - case SNDRV_PCM_TRIGGER_SUSPEND: - case SNDRV_PCM_TRIGGER_PAUSE_PUSH: - if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { - val = rv_readl(rtd->acp3x_base + mmACP_BTTDM_ITER); - val = val & ~BIT(0); - rv_writel(val, rtd->acp3x_base + mmACP_BTTDM_ITER); - } else { - val = rv_readl(rtd->acp3x_base + mmACP_BTTDM_IRER); - val = val & ~BIT(0); - rv_writel(val, rtd->acp3x_base + mmACP_BTTDM_IRER); - } - rv_writel(0, rtd->acp3x_base + mmACP_BTTDM_IER); - break; - default: - ret = -EINVAL; - break; - } - - return ret; -} - -static struct snd_soc_dai_ops acp3x_dai_i2s_ops = { - .hw_params = acp3x_dai_i2s_hwparams, - .trigger = acp3x_dai_i2s_trigger, - .set_fmt = acp3x_dai_i2s_set_fmt, - .set_tdm_slot = acp3x_dai_set_tdm_slot, -}; - -static struct snd_soc_dai_driver acp3x_i2s_dai_driver = { - .playback = { - .rates = SNDRV_PCM_RATE_8000_96000, - .formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S8 | - SNDRV_PCM_FMTBIT_U8 | - SNDRV_PCM_FMTBIT_S24_LE | - SNDRV_PCM_FMTBIT_S32_LE, - .channels_min = 2, - .channels_max = 8, - - .rate_min = 8000, - .rate_max = 96000, - }, - .capture = { - .rates = SNDRV_PCM_RATE_8000_48000, - .formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S8 | - SNDRV_PCM_FMTBIT_U8 | - SNDRV_PCM_FMTBIT_S24_LE | - SNDRV_PCM_FMTBIT_S32_LE, - .channels_min = 2, - .channels_max = 2, - .rate_min = 8000, - .rate_max = 48000, - }, - .ops = &acp3x_dai_i2s_ops, -}; - static const struct snd_soc_component_driver acp3x_i2s_component = { .name = DRV_NAME, .open = acp3x_dma_open, @@ -619,6 +415,9 @@ static int acp3x_audio_probe(struct platform_device *pdev) return -ENODEV; } irqflags = *((unsigned int *)(pdev->dev.platform_data)); + adata = devm_kzalloc(&pdev->dev, sizeof(*adata), GFP_KERNEL); + if (!adata) + return -ENOMEM;

res = platform_get_resource(pdev, IORESOURCE_MEM, 0); if (!res) { @@ -626,10 +425,6 @@ static int acp3x_audio_probe(struct platform_device *pdev) return -ENODEV; }

- adata = devm_kzalloc(&pdev->dev, sizeof(*adata), GFP_KERNEL); - if (!adata) - return -ENOMEM; - adata->acp3x_base = devm_ioremap(&pdev->dev, res->start, resource_size(res));

@@ -650,9 +445,9 @@ static int acp3x_audio_probe(struct platform_device *pdev) return -ENODEV; status = devm_snd_soc_register_component(&pdev->dev, &acp3x_i2s_component, - &acp3x_i2s_dai_driver, 1); + NULL, 0); if (status) { - dev_err(&pdev->dev, "Fail to register acp i2s dai\n"); + dev_err(&pdev->dev, "Fail to register acp i2s component\n"); goto dev_err; } status = devm_request_irq(&pdev->dev, adata->i2s_irq, i2s_irq_handler, @@ -774,13 +569,14 @@ static struct platform_driver acp3x_dma_driver = { .probe = acp3x_audio_probe, .remove = acp3x_audio_remove, .driver = { - .name = "acp3x_rv_i2s", + .name = "acp3x_rv_i2s_dma", .pm = &acp3x_pm_ops, }, };

module_platform_driver(acp3x_dma_driver);

+MODULE_AUTHOR("Vishnuvardhanrao.Ravulapati@amd.com"); MODULE_AUTHOR("Maruthi.Bayyavarapu@amd.com"); MODULE_AUTHOR("Vijendar.Mukunda@amd.com"); MODULE_DESCRIPTION("AMD ACP 3.x PCM Driver"); diff --git a/sound/soc/amd/raven/acp3x.h b/sound/soc/amd/raven/acp3x.h index 2f15fe1..72c1a23 100644 --- a/sound/soc/amd/raven/acp3x.h +++ b/sound/soc/amd/raven/acp3x.h @@ -51,6 +51,29 @@ #define SLOT_WIDTH_24 0x18 #define SLOT_WIDTH_32 0x20

+struct acp3x_platform_info { + u16 play_i2s_instance; + u16 cap_i2s_instance; + u16 capture_channel; +}; + +struct i2s_dev_data { + bool tdm_mode; + unsigned int i2s_irq; + u32 tdm_fmt; + void __iomem *acp3x_base; + struct snd_pcm_substream *play_stream; + struct snd_pcm_substream *capture_stream; +}; + +struct i2s_stream_instance { + u16 num_pages; + u16 channels; + u32 xfer_resolution; + u64 bytescount; + dma_addr_t dma_addr; + void __iomem *acp3x_base; +};

static inline u32 rv_readl(void __iomem *base_addr) { @@ -61,3 +84,22 @@ static inline void rv_writel(u32 val, void __iomem *base_addr) { writel(val, base_addr - ACP3x_PHY_BASE_ADDRESS); } + +static inline u64 acp_get_byte_count(struct i2s_stream_instance *rtd, + int direction) +{ + u64 byte_count; + + if (direction == SNDRV_PCM_STREAM_PLAYBACK) { + byte_count = rv_readl(rtd->acp3x_base + + mmACP_BT_TX_LINEARPOSITIONCNTR_HIGH); + byte_count |= rv_readl(rtd->acp3x_base + + mmACP_BT_TX_LINEARPOSITIONCNTR_LOW); + } else { + byte_count = rv_readl(rtd->acp3x_base + + mmACP_BT_RX_LINEARPOSITIONCNTR_HIGH); + byte_count |= rv_readl(rtd->acp3x_base + + mmACP_BT_RX_LINEARPOSITIONCNTR_LOW); + } + return byte_count; +}