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ASoC: qcom: add sdm845 sound card support
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This patch adds sdm845 audio machine driver support.

Acked-by: Srinivas Kandagatla <[email protected]>
Signed-off-by: Rohit kumar <[email protected]>
Signed-off-by: Mark Brown <[email protected]>
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@rohkkumar @broonie
rohkkumar authored and broonie committed Aug 1, 2018
1 parent c25e295 commit 6b1687b
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8 changes: 8 additions & 0 deletions sound/soc/qcom/Kconfig
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Expand Up @@ -90,3 +90,11 @@ config SND_SOC_MSM8996
Support for Qualcomm Technologies LPASS audio block in
APQ8096 SoC-based systems.
Say Y if you want to use audio device on this SoCs

config SND_SOC_SDM845
tristate "SoC Machine driver for SDM845 boards"
select SND_SOC_QDSP6
help
To add support for audio on Qualcomm Technologies Inc.
SDM845 SoC-based systems.
Say Y if you want to use audio device on this SoCs.
2 changes: 2 additions & 0 deletions sound/soc/qcom/Makefile
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Expand Up @@ -14,10 +14,12 @@ obj-$(CONFIG_SND_SOC_LPASS_APQ8016) += snd-soc-lpass-apq8016.o
snd-soc-storm-objs := storm.o
snd-soc-apq8016-sbc-objs := apq8016_sbc.o
snd-soc-apq8096-objs := apq8096.o common.o
snd-soc-sdm845-objs := sdm845.o common.o

obj-$(CONFIG_SND_SOC_STORM) += snd-soc-storm.o
obj-$(CONFIG_SND_SOC_APQ8016_SBC) += snd-soc-apq8016-sbc.o
obj-$(CONFIG_SND_SOC_MSM8996) += snd-soc-apq8096.o
obj-$(CONFIG_SND_SOC_SDM845) += snd-soc-sdm845.o

#DSP lib
obj-$(CONFIG_SND_SOC_QDSP6) += qdsp6/
286 changes: 286 additions & 0 deletions sound/soc/qcom/sdm845.c
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@@ -0,0 +1,286 @@
// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (c) 2018, The Linux Foundation. All rights reserved.
*/

#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/atomic.h>
#include <linux/of_device.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
#include <linux/soc/qcom/apr.h>
#include "common.h"
#include "qdsp6/q6afe.h"

#define DEFAULT_SAMPLE_RATE_48K 48000
#define DEFAULT_MCLK_RATE 24576000
#define DEFAULT_BCLK_RATE 12288000

struct sdm845_snd_data {
struct snd_soc_card *card;
uint32_t pri_mi2s_clk_count;
uint32_t quat_tdm_clk_count;
};

static unsigned int tdm_slot_offset[8] = {0, 4, 8, 12, 16, 20, 24, 28};

static int sdm845_tdm_snd_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params)
{
struct snd_soc_pcm_runtime *rtd = substream->private_data;
struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
int ret = 0;
int channels, slot_width;

switch (params_format(params)) {
case SNDRV_PCM_FORMAT_S16_LE:
slot_width = 32;
break;
default:
dev_err(rtd->dev, "%s: invalid param format 0x%x\n",
__func__, params_format(params));
return -EINVAL;
}

channels = params_channels(params);
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
ret = snd_soc_dai_set_tdm_slot(cpu_dai, 0, 0x3,
8, slot_width);
if (ret < 0) {
dev_err(rtd->dev, "%s: failed to set tdm slot, err:%d\n",
__func__, ret);
goto end;
}

ret = snd_soc_dai_set_channel_map(cpu_dai, 0, NULL,
channels, tdm_slot_offset);
if (ret < 0) {
dev_err(rtd->dev, "%s: failed to set channel map, err:%d\n",
__func__, ret);
goto end;
}
} else {
ret = snd_soc_dai_set_tdm_slot(cpu_dai, 0xf, 0,
8, slot_width);
if (ret < 0) {
dev_err(rtd->dev, "%s: failed to set tdm slot, err:%d\n",
__func__, ret);
goto end;
}

ret = snd_soc_dai_set_channel_map(cpu_dai, channels,
tdm_slot_offset, 0, NULL);
if (ret < 0) {
dev_err(rtd->dev, "%s: failed to set channel map, err:%d\n",
__func__, ret);
goto end;
}
}
end:
return ret;
}

static int sdm845_snd_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params)
{
struct snd_soc_pcm_runtime *rtd = substream->private_data;
struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
int ret = 0;

switch (cpu_dai->id) {
case QUATERNARY_TDM_RX_0:
case QUATERNARY_TDM_TX_0:
ret = sdm845_tdm_snd_hw_params(substream, params);
break;
default:
pr_err("%s: invalid dai id 0x%x\n", __func__, cpu_dai->id);
break;
}
return ret;
}

static int sdm845_snd_startup(struct snd_pcm_substream *substream)
{
unsigned int fmt = SND_SOC_DAIFMT_CBS_CFS;
struct snd_soc_pcm_runtime *rtd = substream->private_data;
struct snd_soc_card *card = rtd->card;
struct sdm845_snd_data *data = snd_soc_card_get_drvdata(card);
struct snd_soc_dai *cpu_dai = rtd->cpu_dai;

switch (cpu_dai->id) {
case PRIMARY_MI2S_RX:
case PRIMARY_MI2S_TX:
if (++(data->pri_mi2s_clk_count) == 1) {
snd_soc_dai_set_sysclk(cpu_dai,
Q6AFE_LPASS_CLK_ID_MCLK_1,
DEFAULT_MCLK_RATE, SNDRV_PCM_STREAM_PLAYBACK);
snd_soc_dai_set_sysclk(cpu_dai,
Q6AFE_LPASS_CLK_ID_PRI_MI2S_IBIT,
DEFAULT_BCLK_RATE, SNDRV_PCM_STREAM_PLAYBACK);
}
snd_soc_dai_set_fmt(cpu_dai, fmt);
break;

case QUATERNARY_TDM_RX_0:
case QUATERNARY_TDM_TX_0:
if (++(data->quat_tdm_clk_count) == 1) {
snd_soc_dai_set_sysclk(cpu_dai,
Q6AFE_LPASS_CLK_ID_QUAD_TDM_IBIT,
DEFAULT_BCLK_RATE, SNDRV_PCM_STREAM_PLAYBACK);
}
break;

default:
pr_err("%s: invalid dai id 0x%x\n", __func__, cpu_dai->id);
break;
}
return 0;
}

static void sdm845_snd_shutdown(struct snd_pcm_substream *substream)
{
struct snd_soc_pcm_runtime *rtd = substream->private_data;
struct snd_soc_card *card = rtd->card;
struct sdm845_snd_data *data = snd_soc_card_get_drvdata(card);
struct snd_soc_dai *cpu_dai = rtd->cpu_dai;

switch (cpu_dai->id) {
case PRIMARY_MI2S_RX:
case PRIMARY_MI2S_TX:
if (--(data->pri_mi2s_clk_count) == 0) {
snd_soc_dai_set_sysclk(cpu_dai,
Q6AFE_LPASS_CLK_ID_MCLK_1,
0, SNDRV_PCM_STREAM_PLAYBACK);
snd_soc_dai_set_sysclk(cpu_dai,
Q6AFE_LPASS_CLK_ID_PRI_MI2S_IBIT,
0, SNDRV_PCM_STREAM_PLAYBACK);
};
break;

case QUATERNARY_TDM_RX_0:
case QUATERNARY_TDM_TX_0:
if (--(data->quat_tdm_clk_count) == 0) {
snd_soc_dai_set_sysclk(cpu_dai,
Q6AFE_LPASS_CLK_ID_QUAD_TDM_IBIT,
0, SNDRV_PCM_STREAM_PLAYBACK);
}
break;

default:
pr_err("%s: invalid dai id 0x%x\n", __func__, cpu_dai->id);
break;
}
}

static struct snd_soc_ops sdm845_be_ops = {
.hw_params = sdm845_snd_hw_params,
.startup = sdm845_snd_startup,
.shutdown = sdm845_snd_shutdown,
};

static int sdm845_be_hw_params_fixup(struct snd_soc_pcm_runtime *rtd,
struct snd_pcm_hw_params *params)
{
struct snd_interval *rate = hw_param_interval(params,
SNDRV_PCM_HW_PARAM_RATE);
struct snd_interval *channels = hw_param_interval(params,
SNDRV_PCM_HW_PARAM_CHANNELS);
struct snd_mask *fmt = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);

rate->min = rate->max = DEFAULT_SAMPLE_RATE_48K;
channels->min = channels->max = 2;
snd_mask_set_format(fmt, SNDRV_PCM_FORMAT_S16_LE);

return 0;
}

static void sdm845_add_be_ops(struct snd_soc_card *card)
{
struct snd_soc_dai_link *link = card->dai_link;
int i, num_links = card->num_links;

for (i = 0; i < num_links; i++) {
if (link->no_pcm == 1) {
link->ops = &sdm845_be_ops;
link->be_hw_params_fixup = sdm845_be_hw_params_fixup;
}
link++;
}
}

static int sdm845_snd_platform_probe(struct platform_device *pdev)
{
struct snd_soc_card *card;
struct sdm845_snd_data *data;
struct device *dev = &pdev->dev;
int ret;

card = kzalloc(sizeof(*card), GFP_KERNEL);
if (!card)
return -ENOMEM;

/* Allocate the private data */
data = kzalloc(sizeof(*data), GFP_KERNEL);
if (!data)
return -ENOMEM;

card->dev = dev;
card->auto_bind = true;
dev_set_drvdata(dev, card);
ret = qcom_snd_parse_of(card);
if (ret) {
dev_err(dev, "Error parsing OF data\n");
goto parse_dt_fail;
}

data->card = card;
snd_soc_card_set_drvdata(card, data);

sdm845_add_be_ops(card);
ret = snd_soc_register_card(card);
if (ret) {
dev_err(dev, "Sound card registration failed\n");
goto register_card_fail;
}
return ret;

register_card_fail:
kfree(card->dai_link);
parse_dt_fail:
kfree(data);
kfree(card);
return ret;
}

static int sdm845_snd_platform_remove(struct platform_device *pdev)
{
struct snd_soc_card *card = dev_get_drvdata(&pdev->dev);
struct sdm845_snd_data *data = snd_soc_card_get_drvdata(card);

card->auto_bind = false;
snd_soc_unregister_card(card);
kfree(card->dai_link);
kfree(data);
kfree(card);
return 0;
}

static const struct of_device_id sdm845_snd_device_id[] = {
{ .compatible = "qcom,sdm845-sndcard" },
{},
};
MODULE_DEVICE_TABLE(of, sdm845_snd_device_id);

static struct platform_driver sdm845_snd_driver = {
.probe = sdm845_snd_platform_probe,
.remove = sdm845_snd_platform_remove,
.driver = {
.name = "msm-snd-sdm845",
.of_match_table = sdm845_snd_device_id,
},
};
module_platform_driver(sdm845_snd_driver);

MODULE_DESCRIPTION("sdm845 ASoC Machine Driver");
MODULE_LICENSE("GPL v2");

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