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// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright (c) 2021 The Linux Foundation. All rights reserved.
*
* lpass-cdc-dma.c -- ALSA SoC CDC DMA CPU DAI driver for QTi LPASS
*/
#include <linux/clk.h>
#include <linux/module.h>
#include <linux/export.h>
#include <sound/soc.h>
#include <sound/soc-dai.h>
#include "lpass-lpaif-reg.h"
#include "lpass.h"
#define CODEC_MEM_HZ_NORMAL 153600000
enum codec_dma_interfaces {
LPASS_CDC_DMA_INTERFACE1 = 1,
LPASS_CDC_DMA_INTERFACE2,
LPASS_CDC_DMA_INTERFACE3,
LPASS_CDC_DMA_INTERFACE4,
LPASS_CDC_DMA_INTERFACE5,
LPASS_CDC_DMA_INTERFACE6,
LPASS_CDC_DMA_INTERFACE7,
LPASS_CDC_DMA_INTERFACE8,
LPASS_CDC_DMA_INTERFACE9,
LPASS_CDC_DMA_INTERFACE10,
};
static void __lpass_get_dmactl_handle(struct snd_pcm_substream *substream, struct snd_soc_dai *dai,
struct lpaif_dmactl **dmactl, int *id)
{
struct snd_soc_pcm_runtime *soc_runtime = asoc_substream_to_rtd(substream);
struct snd_soc_dai *cpu_dai = asoc_rtd_to_cpu(soc_runtime, 0);
struct lpass_data *drvdata = snd_soc_dai_get_drvdata(dai);
struct snd_pcm_runtime *rt = substream->runtime;
struct lpass_pcm_data *pcm_data = rt->private_data;
struct lpass_variant *v = drvdata->variant;
unsigned int dai_id = cpu_dai->driver->id;
switch (dai_id) {
case LPASS_CDC_DMA_RX0 ... LPASS_CDC_DMA_RX9:
*dmactl = drvdata->rxtx_rd_dmactl;
*id = pcm_data->dma_ch;
break;
case LPASS_CDC_DMA_TX0 ... LPASS_CDC_DMA_TX8:
*dmactl = drvdata->rxtx_wr_dmactl;
*id = pcm_data->dma_ch - v->rxtx_wrdma_channel_start;
break;
case LPASS_CDC_DMA_VA_TX0 ... LPASS_CDC_DMA_VA_TX8:
*dmactl = drvdata->va_wr_dmactl;
*id = pcm_data->dma_ch - v->va_wrdma_channel_start;
break;
default:
dev_err(soc_runtime->dev, "invalid dai id for dma ctl: %d\n", dai_id);
break;
}
}
static int __lpass_get_codec_dma_intf_type(int dai_id)
{
int ret;
switch (dai_id) {
case LPASS_CDC_DMA_RX0:
case LPASS_CDC_DMA_TX0:
case LPASS_CDC_DMA_VA_TX0:
ret = LPASS_CDC_DMA_INTERFACE1;
break;
case LPASS_CDC_DMA_RX1:
case LPASS_CDC_DMA_TX1:
case LPASS_CDC_DMA_VA_TX1:
ret = LPASS_CDC_DMA_INTERFACE2;
break;
case LPASS_CDC_DMA_RX2:
case LPASS_CDC_DMA_TX2:
case LPASS_CDC_DMA_VA_TX2:
ret = LPASS_CDC_DMA_INTERFACE3;
break;
case LPASS_CDC_DMA_RX3:
case LPASS_CDC_DMA_TX3:
case LPASS_CDC_DMA_VA_TX3:
ret = LPASS_CDC_DMA_INTERFACE4;
break;
case LPASS_CDC_DMA_RX4:
case LPASS_CDC_DMA_TX4:
case LPASS_CDC_DMA_VA_TX4:
ret = LPASS_CDC_DMA_INTERFACE5;
break;
case LPASS_CDC_DMA_RX5:
case LPASS_CDC_DMA_TX5:
case LPASS_CDC_DMA_VA_TX5:
ret = LPASS_CDC_DMA_INTERFACE6;
break;
case LPASS_CDC_DMA_RX6:
case LPASS_CDC_DMA_TX6:
case LPASS_CDC_DMA_VA_TX6:
ret = LPASS_CDC_DMA_INTERFACE7;
break;
case LPASS_CDC_DMA_RX7:
case LPASS_CDC_DMA_TX7:
case LPASS_CDC_DMA_VA_TX7:
ret = LPASS_CDC_DMA_INTERFACE8;
break;
case LPASS_CDC_DMA_RX8:
case LPASS_CDC_DMA_TX8:
case LPASS_CDC_DMA_VA_TX8:
ret = LPASS_CDC_DMA_INTERFACE9;
break;
case LPASS_CDC_DMA_RX9:
ret = LPASS_CDC_DMA_INTERFACE10;
break;
default:
ret = -EINVAL;
break;
}
return ret;
}
static int __lpass_platform_codec_intf_init(struct snd_soc_dai *dai,
struct snd_pcm_substream *substream)
{
struct snd_soc_pcm_runtime *soc_runtime = asoc_substream_to_rtd(substream);
struct snd_soc_dai *cpu_dai = asoc_rtd_to_cpu(soc_runtime, 0);
struct lpaif_dmactl *dmactl = NULL;
struct device *dev = soc_runtime->dev;
int ret, id, codec_intf;
unsigned int dai_id = cpu_dai->driver->id;
codec_intf = __lpass_get_codec_dma_intf_type(dai_id);
if (codec_intf < 0) {
dev_err(dev, "failed to get codec_intf: %d\n", codec_intf);
return codec_intf;
}
__lpass_get_dmactl_handle(substream, dai, &dmactl, &id);
if (!dmactl)
return -EINVAL;
ret = regmap_fields_write(dmactl->codec_intf, id, codec_intf);
if (ret) {
dev_err(dev, "error writing to dmactl codec_intf reg field: %d\n", ret);
return ret;
}
ret = regmap_fields_write(dmactl->codec_fs_sel, id, 0x0);
if (ret) {
dev_err(dev, "error writing to dmactl codec_fs_sel reg field: %d\n", ret);
return ret;
}
ret = regmap_fields_write(dmactl->codec_fs_delay, id, 0x0);
if (ret) {
dev_err(dev, "error writing to dmactl codec_fs_delay reg field: %d\n", ret);
return ret;
}
ret = regmap_fields_write(dmactl->codec_pack, id, 0x1);
if (ret) {
dev_err(dev, "error writing to dmactl codec_pack reg field: %d\n", ret);
return ret;
}
ret = regmap_fields_write(dmactl->codec_enable, id, LPAIF_DMACTL_ENABLE_ON);
if (ret) {
dev_err(dev, "error writing to dmactl codec_enable reg field: %d\n", ret);
return ret;
}
return 0;
}
static int lpass_cdc_dma_daiops_startup(struct snd_pcm_substream *substream,
struct snd_soc_dai *dai)
{
struct lpass_data *drvdata = snd_soc_dai_get_drvdata(dai);
struct snd_soc_pcm_runtime *soc_runtime = asoc_substream_to_rtd(substream);
switch (dai->id) {
case LPASS_CDC_DMA_RX0 ... LPASS_CDC_DMA_RX9:
case LPASS_CDC_DMA_TX0 ... LPASS_CDC_DMA_TX8:
clk_set_rate(drvdata->codec_mem0, CODEC_MEM_HZ_NORMAL);
clk_prepare_enable(drvdata->codec_mem0);
break;
case LPASS_CDC_DMA_VA_TX0 ... LPASS_CDC_DMA_VA_TX0:
clk_set_rate(drvdata->va_mem0, CODEC_MEM_HZ_NORMAL);
clk_prepare_enable(drvdata->va_mem0);
break;
default:
dev_err(soc_runtime->dev, "%s: invalid interface: %d\n", __func__, dai->id);
break;
}
return 0;
}
static void lpass_cdc_dma_daiops_shutdown(struct snd_pcm_substream *substream,
struct snd_soc_dai *dai)
{
struct lpass_data *drvdata = snd_soc_dai_get_drvdata(dai);
struct snd_soc_pcm_runtime *soc_runtime = asoc_substream_to_rtd(substream);
switch (dai->id) {
case LPASS_CDC_DMA_RX0 ... LPASS_CDC_DMA_RX9:
case LPASS_CDC_DMA_TX0 ... LPASS_CDC_DMA_TX8:
clk_disable_unprepare(drvdata->codec_mem0);
break;
case LPASS_CDC_DMA_VA_TX0 ... LPASS_CDC_DMA_VA_TX0:
clk_disable_unprepare(drvdata->va_mem0);
break;
default:
dev_err(soc_runtime->dev, "%s: invalid interface: %d\n", __func__, dai->id);
break;
}
}
static int lpass_cdc_dma_daiops_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params,
struct snd_soc_dai *dai)
{
struct snd_soc_pcm_runtime *soc_runtime = asoc_substream_to_rtd(substream);
struct lpaif_dmactl *dmactl = NULL;
unsigned int ret, regval;
unsigned int channels = params_channels(params);
int id;
switch (channels) {
case 1:
regval = LPASS_CDC_DMA_INTF_ONE_CHANNEL;
break;
case 2:
regval = LPASS_CDC_DMA_INTF_TWO_CHANNEL;
break;
case 4:
regval = LPASS_CDC_DMA_INTF_FOUR_CHANNEL;
break;
case 6:
regval = LPASS_CDC_DMA_INTF_SIX_CHANNEL;
break;
case 8:
regval = LPASS_CDC_DMA_INTF_EIGHT_CHANNEL;
break;
default:
dev_err(soc_runtime->dev, "invalid PCM config\n");
return -EINVAL;
}
__lpass_get_dmactl_handle(substream, dai, &dmactl, &id);
if (!dmactl)
return -EINVAL;
ret = regmap_fields_write(dmactl->codec_channel, id, regval);
if (ret) {
dev_err(soc_runtime->dev,
"error writing to dmactl codec_channel reg field: %d\n", ret);
return ret;
}
return 0;
}
static int lpass_cdc_dma_daiops_trigger(struct snd_pcm_substream *substream,
int cmd, struct snd_soc_dai *dai)
{
struct snd_soc_pcm_runtime *soc_runtime = asoc_substream_to_rtd(substream);
struct lpaif_dmactl *dmactl;
int ret = 0, id;
switch (cmd) {
case SNDRV_PCM_TRIGGER_START:
case SNDRV_PCM_TRIGGER_RESUME:
case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
__lpass_platform_codec_intf_init(dai, substream);
break;
case SNDRV_PCM_TRIGGER_STOP:
case SNDRV_PCM_TRIGGER_SUSPEND:
case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
__lpass_get_dmactl_handle(substream, dai, &dmactl, &id);
if (!dmactl)
return -EINVAL;
ret = regmap_fields_write(dmactl->codec_enable, id, LPAIF_DMACTL_ENABLE_OFF);
if (ret) {
dev_err(soc_runtime->dev,
"error writing to dmactl codec_enable reg: %d\n", ret);
return ret;
}
break;
default:
ret = -EINVAL;
dev_err(soc_runtime->dev, "%s: invalid %d interface\n", __func__, cmd);
break;
}
return ret;
}
const struct snd_soc_dai_ops asoc_qcom_lpass_cdc_dma_dai_ops = {
.startup = lpass_cdc_dma_daiops_startup,
.shutdown = lpass_cdc_dma_daiops_shutdown,
.hw_params = lpass_cdc_dma_daiops_hw_params,
.trigger = lpass_cdc_dma_daiops_trigger,
};
EXPORT_SYMBOL_GPL(asoc_qcom_lpass_cdc_dma_dai_ops);
MODULE_DESCRIPTION("QTi LPASS CDC DMA Driver");
MODULE_LICENSE("GPL");
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