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// 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 <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;
int mode;
adata = snd_soc_dai_get_drvdata(cpu_dai);
mode = fmt & SND_SOC_DAIFMT_FORMAT_MASK;
switch (mode) {
case SND_SOC_DAIFMT_I2S:
adata->tdm_mode = TDM_DISABLE;
break;
case SND_SOC_DAIFMT_DSP_A:
adata->tdm_mode = TDM_ENABLE;
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)
{
struct i2s_dev_data *adata;
u32 frm_len;
u16 slot_len;
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;
}
frm_len = FRM_LEN | (slots << 15) | (slot_len << 18);
adata->tdm_fmt = frm_len;
return 0;
}
static int acp3x_i2s_hwparams(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params, struct snd_soc_dai *dai)
{
struct i2s_stream_instance *rtd;
struct snd_soc_pcm_runtime *prtd;
struct snd_soc_card *card;
struct acp3x_platform_info *pinfo;
struct i2s_dev_data *adata;
u32 val;
u32 reg_val, frmt_reg;
prtd = substream->private_data;
rtd = substream->runtime->private_data;
card = prtd->card;
adata = snd_soc_dai_get_drvdata(dai);
pinfo = snd_soc_card_get_drvdata(card);
if (pinfo) {
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
rtd->i2s_instance = pinfo->play_i2s_instance;
else
rtd->i2s_instance = pinfo->cap_i2s_instance;
}
/* These values are as per Hardware Spec */
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) {
switch (rtd->i2s_instance) {
case I2S_BT_INSTANCE:
reg_val = mmACP_BTTDM_ITER;
frmt_reg = mmACP_BTTDM_TXFRMT;
break;
case I2S_SP_INSTANCE:
default:
reg_val = mmACP_I2STDM_ITER;
frmt_reg = mmACP_I2STDM_TXFRMT;
}
} else {
switch (rtd->i2s_instance) {
case I2S_BT_INSTANCE:
reg_val = mmACP_BTTDM_IRER;
frmt_reg = mmACP_BTTDM_RXFRMT;
break;
case I2S_SP_INSTANCE:
default:
reg_val = mmACP_I2STDM_IRER;
frmt_reg = mmACP_I2STDM_RXFRMT;
}
}
if (adata->tdm_mode) {
val = rv_readl(rtd->acp3x_base + reg_val);
rv_writel(val | 0x2, rtd->acp3x_base + reg_val);
rv_writel(adata->tdm_fmt, rtd->acp3x_base + frmt_reg);
}
val = rv_readl(rtd->acp3x_base + reg_val);
val &= ~ACP3x_ITER_IRER_SAMP_LEN_MASK;
val = val | (rtd->xfer_resolution << 3);
rv_writel(val, rtd->acp3x_base + reg_val);
return 0;
}
static int acp3x_i2s_trigger(struct snd_pcm_substream *substream,
int cmd, struct snd_soc_dai *dai)
{
struct i2s_stream_instance *rtd;
struct snd_soc_pcm_runtime *prtd;
struct snd_soc_card *card;
struct acp3x_platform_info *pinfo;
u32 ret, val, period_bytes, reg_val, ier_val, water_val;
u32 buf_size, buf_reg;
prtd = substream->private_data;
rtd = substream->runtime->private_data;
card = prtd->card;
pinfo = snd_soc_card_get_drvdata(card);
if (pinfo) {
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
rtd->i2s_instance = pinfo->play_i2s_instance;
else
rtd->i2s_instance = pinfo->cap_i2s_instance;
}
period_bytes = frames_to_bytes(substream->runtime,
substream->runtime->period_size);
buf_size = frames_to_bytes(substream->runtime,
substream->runtime->buffer_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) {
switch (rtd->i2s_instance) {
case I2S_BT_INSTANCE:
water_val =
mmACP_BT_TX_INTR_WATERMARK_SIZE;
reg_val = mmACP_BTTDM_ITER;
ier_val = mmACP_BTTDM_IER;
buf_reg = mmACP_BT_TX_RINGBUFSIZE;
break;
case I2S_SP_INSTANCE:
default:
water_val =
mmACP_I2S_TX_INTR_WATERMARK_SIZE;
reg_val = mmACP_I2STDM_ITER;
ier_val = mmACP_I2STDM_IER;
buf_reg = mmACP_I2S_TX_RINGBUFSIZE;
}
} else {
switch (rtd->i2s_instance) {
case I2S_BT_INSTANCE:
water_val =
mmACP_BT_RX_INTR_WATERMARK_SIZE;
reg_val = mmACP_BTTDM_IRER;
ier_val = mmACP_BTTDM_IER;
buf_reg = mmACP_BT_RX_RINGBUFSIZE;
break;
case I2S_SP_INSTANCE:
default:
water_val =
mmACP_I2S_RX_INTR_WATERMARK_SIZE;
reg_val = mmACP_I2STDM_IRER;
ier_val = mmACP_I2STDM_IER;
buf_reg = mmACP_I2S_RX_RINGBUFSIZE;
}
}
rv_writel(period_bytes, rtd->acp3x_base + water_val);
rv_writel(buf_size, rtd->acp3x_base + buf_reg);
val = rv_readl(rtd->acp3x_base + reg_val);
val = val | BIT(0);
rv_writel(val, rtd->acp3x_base + reg_val);
rv_writel(1, rtd->acp3x_base + ier_val);
ret = 0;
break;
case SNDRV_PCM_TRIGGER_STOP:
case SNDRV_PCM_TRIGGER_SUSPEND:
case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
switch (rtd->i2s_instance) {
case I2S_BT_INSTANCE:
reg_val = mmACP_BTTDM_ITER;
break;
case I2S_SP_INSTANCE:
default:
reg_val = mmACP_I2STDM_ITER;
}
} else {
switch (rtd->i2s_instance) {
case I2S_BT_INSTANCE:
reg_val = mmACP_BTTDM_IRER;
break;
case I2S_SP_INSTANCE:
default:
reg_val = mmACP_I2STDM_IRER;
}
}
val = rv_readl(rtd->acp3x_base + reg_val);
val = val & ~BIT(0);
rv_writel(val, rtd->acp3x_base + reg_val);
if (!(rv_readl(rtd->acp3x_base + mmACP_BTTDM_ITER) & BIT(0)) &&
!(rv_readl(rtd->acp3x_base + mmACP_BTTDM_IRER) & BIT(0)))
rv_writel(0, rtd->acp3x_base + mmACP_BTTDM_IER);
if (!(rv_readl(rtd->acp3x_base + mmACP_I2STDM_ITER) & BIT(0)) &&
!(rv_readl(rtd->acp3x_base + mmACP_I2STDM_IRER) & BIT(0)))
rv_writel(0, rtd->acp3x_base + mmACP_I2STDM_IER);
ret = 0;
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)
{
struct resource *res;
struct i2s_dev_data *adata;
int ret;
adata = devm_kzalloc(&pdev->dev, sizeof(struct i2s_dev_data),
GFP_KERNEL);
if (!adata)
return -ENOMEM;
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (!res) {
dev_err(&pdev->dev, "IORESOURCE_MEM FAILED\n");
return -ENOMEM;
}
adata->acp3x_base = devm_ioremap(&pdev->dev, res->start,
resource_size(res));
if (!adata->acp3x_base)
return -ENOMEM;
adata->i2s_irq = res->start;
dev_set_drvdata(&pdev->dev, adata);
ret = devm_snd_soc_register_component(&pdev->dev,
&acp3x_dai_component, &acp3x_i2s_dai, 1);
if (ret) {
dev_err(&pdev->dev, "Fail to register acp i2s dai\n");
return -ENODEV;
}
return 0;
}
static int acp3x_dai_remove(struct platform_device *pdev)
{
/* As we use devm_ memory alloc there is nothing TBD here */
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);
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