asoc/kona.c

// SPDX-License-Identifier: GPL-2.0
/*
 * Copyright (c) 2016-2018, The Linux Foundation. All rights reserved.
 */

#include <linux/clk.h>
#include <linux/delay.h>
#include <linux/gpio.h>
#include <linux/of_gpio.h>
#include <linux/platform_device.h>
#include <linux/slab.h>
#include <linux/io.h>
#include <linux/module.h>
#include <linux/input.h>
#include <linux/of_device.h>
#include <sound/core.h>
#include <sound/soc.h>
#include <sound/soc-dapm.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
#include <sound/info.h>
#include <dsp/audio_notifier.h>
#include <dsp/q6afe-v2.h>
#include <dsp/q6core.h>
#include "device_event.h"
#include "msm-pcm-routing-v2.h"
#include "codecs/wsa881x.h"

#define DRV_NAME "kona-asoc-snd"

#define __CHIPSET__ "KONA "
#define MSM_DAILINK_NAME(name) (__CHIPSET__#name)

#define SAMPLING_RATE_8KHZ      8000
#define SAMPLING_RATE_16KHZ     16000

struct msm_asoc_mach_data {
	u32 mclk_freq;
	struct snd_info_entry *codec_root;
};

struct dev_config {
	u32 sample_rate;
	u32 bit_format;
	u32 channels;
};

enum {
	PRIM_AUX_PCM = 0,
};

static const char *const auxpcm_rate_text[] = {"KHZ_8", "KHZ_16"};
static char const *bit_format_text[] = {"S16_LE", "S24_LE", "S24_3LE",
					  "S32_LE"};

/* Default configuration of aux pcm channels */
static struct dev_config aux_pcm_rx_cfg[] = {
	[PRIM_AUX_PCM] = {SAMPLING_RATE_8KHZ, SNDRV_PCM_FORMAT_S16_LE, 1},
};

static struct dev_config aux_pcm_tx_cfg[] = {
	[PRIM_AUX_PCM] = {SAMPLING_RATE_8KHZ, SNDRV_PCM_FORMAT_S16_LE, 1},
};

static SOC_ENUM_SINGLE_EXT_DECL(prim_aux_pcm_rx_sample_rate, auxpcm_rate_text);
static SOC_ENUM_SINGLE_EXT_DECL(prim_aux_pcm_tx_sample_rate, auxpcm_rate_text);
static SOC_ENUM_SINGLE_EXT_DECL(aux_pcm_rx_format, bit_format_text);
static SOC_ENUM_SINGLE_EXT_DECL(aux_pcm_tx_format, bit_format_text);

static inline int param_is_mask(int p)
{
	return (p >= SNDRV_PCM_HW_PARAM_FIRST_MASK) &&
			(p <= SNDRV_PCM_HW_PARAM_LAST_MASK);
}

static inline struct snd_mask *param_to_mask(struct snd_pcm_hw_params *p,
					     int n)
{
	return &(p->masks[n - SNDRV_PCM_HW_PARAM_FIRST_MASK]);
}

static void param_set_mask(struct snd_pcm_hw_params *p, int n,
			   unsigned int bit)
{
	if (bit >= SNDRV_MASK_MAX)
		return;
	if (param_is_mask(n)) {
		struct snd_mask *m = param_to_mask(p, n);

		m->bits[0] = 0;
		m->bits[1] = 0;
		m->bits[bit >> 5] |= (1 << (bit & 31));
	}
}

static int aux_pcm_get_port_idx(struct snd_kcontrol *kcontrol)
{
	int idx = 0;

	if (strnstr(kcontrol->id.name, "PRIM_AUX_PCM",
		    sizeof("PRIM_AUX_PCM"))) {
		idx = PRIM_AUX_PCM;
	} else {
		pr_err("%s: unsupported port: %s\n",
			__func__, kcontrol->id.name);
		idx = -EINVAL;
	}

	return idx;
}

static int aux_pcm_get_format(int value)
{
	int format = 0;

	switch (value) {
	case 1:
		format = SNDRV_PCM_FORMAT_S24_LE;
		break;
	case 2:
		format = SNDRV_PCM_FORMAT_S24_3LE;
		break;
	case 3:
		format = SNDRV_PCM_FORMAT_S32_LE;
		break;
	case 0:
	default:
		format = SNDRV_PCM_FORMAT_S16_LE;
		break;
	}
	return format;
}

static int auxpcm_get_format_value(int format)
{
	int value = 0;

	switch (format) {
	case SNDRV_PCM_FORMAT_S24_LE:
		value = 1;
		break;
	case SNDRV_PCM_FORMAT_S24_3LE:
		value = 2;
		break;
	case SNDRV_PCM_FORMAT_S32_LE:
		value = 3;
		break;
	case SNDRV_PCM_FORMAT_S16_LE:
	default:
		value = 0;
		break;
	}
	return value;
}

static int aux_pcm_get_sample_rate(int value)
{
	int sample_rate = 0;

	switch (value) {
	case 1:
		sample_rate = SAMPLING_RATE_16KHZ;
		break;
	case 0:
	default:
		sample_rate = SAMPLING_RATE_8KHZ;
		break;
	}
	return sample_rate;
}

static int aux_pcm_get_sample_rate_val(int sample_rate)
{
	int sample_rate_val = 0;

	switch (sample_rate) {
	case SAMPLING_RATE_16KHZ:
		sample_rate_val = 1;
		break;
	case SAMPLING_RATE_8KHZ:
	default:
		sample_rate_val = 0;
		break;
	}
	return sample_rate_val;
}

static int msm_aux_pcm_rx_format_get(struct snd_kcontrol *kcontrol,
				struct snd_ctl_elem_value *ucontrol)
{
	int idx = aux_pcm_get_port_idx(kcontrol);

	if (idx < 0)
		return idx;

	ucontrol->value.enumerated.item[0] =
		auxpcm_get_format_value(aux_pcm_rx_cfg[idx].bit_format);

	pr_debug("%s: idx[%d]_rx_format = %d, item = %d\n", __func__,
		idx, aux_pcm_rx_cfg[idx].bit_format,
		ucontrol->value.enumerated.item[0]);

	return 0;
}

static int msm_aux_pcm_rx_format_put(struct snd_kcontrol *kcontrol,
				struct snd_ctl_elem_value *ucontrol)
{
	int idx = aux_pcm_get_port_idx(kcontrol);

	if (idx < 0)
		return idx;

	aux_pcm_rx_cfg[idx].bit_format =
		aux_pcm_get_format(ucontrol->value.enumerated.item[0]);

	pr_debug("%s: idx[%d]_rx_format = %d, item = %d\n", __func__,
		  idx, aux_pcm_rx_cfg[idx].bit_format,
		  ucontrol->value.enumerated.item[0]);

	return 0;
}

static int msm_aux_pcm_tx_format_get(struct snd_kcontrol *kcontrol,
				struct snd_ctl_elem_value *ucontrol)
{
	int idx = aux_pcm_get_port_idx(kcontrol);

	if (idx < 0)
		return idx;

	ucontrol->value.enumerated.item[0] =
		auxpcm_get_format_value(aux_pcm_tx_cfg[idx].bit_format);

	pr_debug("%s: idx[%d]_tx_format = %d, item = %d\n", __func__,
		idx, aux_pcm_tx_cfg[idx].bit_format,
		ucontrol->value.enumerated.item[0]);

	return 0;
}

static int msm_aux_pcm_tx_format_put(struct snd_kcontrol *kcontrol,
				struct snd_ctl_elem_value *ucontrol)
{
	int idx = aux_pcm_get_port_idx(kcontrol);

	if (idx < 0)
		return idx;

	aux_pcm_tx_cfg[idx].bit_format =
		aux_pcm_get_format(ucontrol->value.enumerated.item[0]);

	pr_debug("%s: idx[%d]_tx_format = %d, item = %d\n", __func__,
		  idx, aux_pcm_tx_cfg[idx].bit_format,
		  ucontrol->value.enumerated.item[0]);

	return 0;
}

static int aux_pcm_rx_sample_rate_put(struct snd_kcontrol *kcontrol,
				      struct snd_ctl_elem_value *ucontrol)
{
	int idx = aux_pcm_get_port_idx(kcontrol);

	if (idx < 0)
		return idx;

	aux_pcm_rx_cfg[idx].sample_rate =
		aux_pcm_get_sample_rate(ucontrol->value.enumerated.item[0]);

	pr_debug("%s: idx[%d]_rx_sample_rate = %d, item = %d\n", __func__,
		 idx, aux_pcm_rx_cfg[idx].sample_rate,
		 ucontrol->value.enumerated.item[0]);

	return 0;
}

static int aux_pcm_rx_sample_rate_get(struct snd_kcontrol *kcontrol,
				      struct snd_ctl_elem_value *ucontrol)
{
	int idx = aux_pcm_get_port_idx(kcontrol);

	if (idx < 0)
		return idx;

	ucontrol->value.enumerated.item[0] =
	     aux_pcm_get_sample_rate_val(aux_pcm_rx_cfg[idx].sample_rate);

	pr_debug("%s: idx[%d]_rx_sample_rate = %d, item = %d\n", __func__,
		 idx, aux_pcm_rx_cfg[idx].sample_rate,
		 ucontrol->value.enumerated.item[0]);

	return 0;
}

static int aux_pcm_tx_sample_rate_put(struct snd_kcontrol *kcontrol,
				      struct snd_ctl_elem_value *ucontrol)
{
	int idx = aux_pcm_get_port_idx(kcontrol);

	if (idx < 0)
		return idx;

	aux_pcm_tx_cfg[idx].sample_rate =
		aux_pcm_get_sample_rate(ucontrol->value.enumerated.item[0]);

	pr_debug("%s: idx[%d]_tx_sample_rate = %d, item = %d\n", __func__,
		 idx, aux_pcm_tx_cfg[idx].sample_rate,
		 ucontrol->value.enumerated.item[0]);

	return 0;
}

static int aux_pcm_tx_sample_rate_get(struct snd_kcontrol *kcontrol,
				   struct snd_ctl_elem_value *ucontrol)
{
	int idx = aux_pcm_get_port_idx(kcontrol);

	if (idx < 0)
		return idx;

	ucontrol->value.enumerated.item[0] =
	     aux_pcm_get_sample_rate_val(aux_pcm_tx_cfg[idx].sample_rate);

	pr_debug("%s: idx[%d]_tx_sample_rate = %d, item = %d\n", __func__,
		 idx, aux_pcm_tx_cfg[idx].sample_rate,
		 ucontrol->value.enumerated.item[0]);

	return 0;
}

static const struct snd_kcontrol_new msm_snd_controls[] = {
	SOC_ENUM_EXT("PRIM_AUX_PCM_RX Format", aux_pcm_rx_format,
			msm_aux_pcm_rx_format_get, msm_aux_pcm_rx_format_put),
	SOC_ENUM_EXT("PRIM_AUX_PCM_TX Format", aux_pcm_tx_format,
			msm_aux_pcm_tx_format_get, msm_aux_pcm_tx_format_put),
	SOC_ENUM_EXT("PRIM_AUX_PCM_RX SampleRate", prim_aux_pcm_rx_sample_rate,
			aux_pcm_rx_sample_rate_get,
			aux_pcm_rx_sample_rate_put),
	SOC_ENUM_EXT("PRIM_AUX_PCM_TX SampleRate", prim_aux_pcm_tx_sample_rate,
			aux_pcm_tx_sample_rate_get,
			aux_pcm_tx_sample_rate_put),
};

static int msm_populate_dai_link_component_of_node(
					struct snd_soc_card *card)
{
	int i, index, ret = 0;
	struct device *cdev = card->dev;
	struct snd_soc_dai_link *dai_link = card->dai_link;
	struct device_node *np;

	if (!cdev) {
		dev_err(cdev, "%s: Sound card device memory NULL\n", __func__);
		return -ENODEV;
	}

	for (i = 0; i < card->num_links; i++) {
		if (dai_link[i].platform_of_node && dai_link[i].cpu_of_node)
			continue;

		/* populate platform_of_node for snd card dai links */
		if (dai_link[i].platform_name &&
		    !dai_link[i].platform_of_node) {
			index = of_property_match_string(cdev->of_node,
						"asoc-platform-names",
						dai_link[i].platform_name);
			if (index < 0) {
				dev_err(cdev, "%s: No match found for platform name: %s\n",
					__func__, dai_link[i].platform_name);
				ret = index;
				goto err;
			}
			np = of_parse_phandle(cdev->of_node, "asoc-platform",
					      index);
			if (!np) {
				dev_err(cdev, "%s: retrieving phandle for platform %s, index %d failed\n",
					__func__, dai_link[i].platform_name,
					index);
				ret = -ENODEV;
				goto err;
			}
			dai_link[i].platform_of_node = np;
			dai_link[i].platform_name = NULL;
		}

		/* populate cpu_of_node for snd card dai links */
		if (dai_link[i].cpu_dai_name && !dai_link[i].cpu_of_node) {
			index = of_property_match_string(cdev->of_node,
						 "asoc-cpu-names",
						 dai_link[i].cpu_dai_name);
			if (index >= 0) {
				np = of_parse_phandle(cdev->of_node, "asoc-cpu",
						index);
				if (!np) {
					dev_err(cdev, "%s: retrieving phandle for cpu dai %s failed\n",
						__func__,
						dai_link[i].cpu_dai_name);
					ret = -ENODEV;
					goto err;
				}
				dai_link[i].cpu_of_node = np;
				dai_link[i].cpu_dai_name = NULL;
			}
		}

		/* populate codec_of_node for snd card dai links */
		if (dai_link[i].codec_name && !dai_link[i].codec_of_node) {
			index = of_property_match_string(cdev->of_node,
						 "asoc-codec-names",
						 dai_link[i].codec_name);
			if (index < 0)
				continue;
			np = of_parse_phandle(cdev->of_node, "asoc-codec",
					      index);
			if (!np) {
				dev_err(cdev, "%s: retrieving phandle for codec %s failed\n",
					__func__, dai_link[i].codec_name);
				ret = -ENODEV;
				goto err;
			}
			dai_link[i].codec_of_node = np;
			dai_link[i].codec_name = NULL;
		}
	}

err:
	return ret;
}

static int msm_audrx_stub_init(struct snd_soc_pcm_runtime *rtd)
{
	int ret = -EINVAL;
	struct snd_soc_component *component = snd_soc_rtdcom_lookup(rtd, "msm-stub-codec");

	if (!component) {
		pr_err("* %s: No match for msm-stub-codec component\n", __func__);
		return ret;
	}

	ret = snd_soc_add_component_controls(component, msm_snd_controls,
			ARRAY_SIZE(msm_snd_controls));
	if (ret < 0) {
		dev_err(component->dev,
			"%s: add_codec_controls failed, err = %d\n",
			__func__, ret);
		return ret;
	}

	return ret;
}

static int msm_snd_stub_hw_params(struct snd_pcm_substream *substream,
			     struct snd_pcm_hw_params *params)
{
	return 0;
}

static int msm_be_hw_params_fixup(struct snd_soc_pcm_runtime *rtd,
				struct snd_pcm_hw_params *params)
{
	struct snd_soc_dai_link *dai_link = rtd->dai_link;
	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);
	int rc = 0;

	pr_debug("%s: format = %d, rate = %d\n",
		  __func__, params_format(params), params_rate(params));

	switch (dai_link->id) {
	case MSM_BACKEND_DAI_AUXPCM_RX:
		param_set_mask(params, SNDRV_PCM_HW_PARAM_FORMAT,
			aux_pcm_rx_cfg[PRIM_AUX_PCM].bit_format);
		rate->min = rate->max =
			aux_pcm_rx_cfg[PRIM_AUX_PCM].sample_rate;
		channels->min = channels->max =
			aux_pcm_rx_cfg[PRIM_AUX_PCM].channels;
		break;
	case MSM_BACKEND_DAI_AUXPCM_TX:
		param_set_mask(params, SNDRV_PCM_HW_PARAM_FORMAT,
			aux_pcm_tx_cfg[PRIM_AUX_PCM].bit_format);
		rate->min = rate->max =
			aux_pcm_tx_cfg[PRIM_AUX_PCM].sample_rate;
		channels->min = channels->max =
			aux_pcm_tx_cfg[PRIM_AUX_PCM].channels;
		break;
	default:
		rate->min = rate->max = SAMPLING_RATE_8KHZ;
		break;
	}

	return rc;
}

static struct snd_soc_ops msm_stub_be_ops = {
	.hw_params = msm_snd_stub_hw_params,
};

struct snd_soc_card snd_soc_card_stub_msm = {
	.name		= "kona-stub-snd-card",
};

static struct snd_soc_dai_link msm_stub_fe_dai_links[] = {
	/* FrontEnd DAI Links */
	{
		.name = "MSMSTUB Media1",
		.stream_name = "MultiMedia1",
		.cpu_dai_name = "MultiMedia1",
		.platform_name = "msm-pcm-dsp.0",
		.dynamic = 1,
		.async_ops = ASYNC_DPCM_SND_SOC_PREPARE,
		.dpcm_playback = 1,
		.dpcm_capture = 1,
		.trigger = {SND_SOC_DPCM_TRIGGER_POST,
			SND_SOC_DPCM_TRIGGER_POST},
		.codec_dai_name = "snd-soc-dummy-dai",
		.codec_name = "snd-soc-dummy",
		.ignore_suspend = 1,
		/* this dainlink has playback support */
		.ignore_pmdown_time = 1,
		.id = MSM_FRONTEND_DAI_MULTIMEDIA1
	},
};

static struct snd_soc_dai_link msm_stub_be_dai_links[] = {
	/* Backend DAI Links */
	{
		.name = LPASS_BE_AUXPCM_RX,
		.stream_name = "AUX PCM Playback",
		.cpu_dai_name = "msm-dai-q6-auxpcm.1",
		.platform_name = "msm-pcm-routing",
		.codec_name = "msm-stub-codec.1",
		.codec_dai_name = "msm-stub-rx",
		.no_pcm = 1,
		.dpcm_playback = 1,
		.id = MSM_BACKEND_DAI_AUXPCM_RX,
		.init = &msm_audrx_stub_init,
		.be_hw_params_fixup = msm_be_hw_params_fixup,
		.ignore_pmdown_time = 1,
		.ignore_suspend = 1,
		.ops = &msm_stub_be_ops,
	},
	{
		.name = LPASS_BE_AUXPCM_TX,
		.stream_name = "AUX PCM Capture",
		.cpu_dai_name = "msm-dai-q6-auxpcm.1",
		.platform_name = "msm-pcm-routing",
		.codec_name = "msm-stub-codec.1",
		.codec_dai_name = "msm-stub-tx",
		.no_pcm = 1,
		.dpcm_capture = 1,
		.id = MSM_BACKEND_DAI_AUXPCM_TX,
		.be_hw_params_fixup = msm_be_hw_params_fixup,
		.ignore_suspend = 1,
		.ops = &msm_stub_be_ops,
	},
};

static struct snd_soc_dai_link msm_stub_dai_links[
			 ARRAY_SIZE(msm_stub_fe_dai_links) +
			 ARRAY_SIZE(msm_stub_be_dai_links)];

static const struct of_device_id kona_asoc_machine_of_match[]  = {
	{ .compatible = "qcom,kona-asoc-snd-stub",
	  .data = "stub_codec"},
	{},
};

static struct snd_soc_card *populate_snd_card_dailinks(struct device *dev)
{
	struct snd_soc_card *card = NULL;
	struct snd_soc_dai_link *dailink;
	int len_1, len_2;
	int total_links;
	const struct of_device_id *match;

	match = of_match_node(kona_asoc_machine_of_match, dev->of_node);
	if (!match) {
		dev_err(dev, "%s: No DT match found for sound card\n",
			__func__);
		return NULL;
	}

	if (!strcmp(match->data, "stub_codec")) {
		card = &snd_soc_card_stub_msm;
		len_1 = ARRAY_SIZE(msm_stub_fe_dai_links);
		len_2 = len_1 + ARRAY_SIZE(msm_stub_be_dai_links);

		memcpy(msm_stub_dai_links,
		       msm_stub_fe_dai_links,
		       sizeof(msm_stub_fe_dai_links));
		memcpy(msm_stub_dai_links + len_1,
		       msm_stub_be_dai_links,
		       sizeof(msm_stub_be_dai_links));

		dailink = msm_stub_dai_links;
		total_links = len_2;
	}

	if (card) {
		card->dai_link = dailink;
		card->num_links = total_links;
	}

	return card;
}

static int msm_asoc_machine_probe(struct platform_device *pdev)
{
	struct snd_soc_card *card;
	struct msm_asoc_mach_data *pdata;
	const struct of_device_id *match;
	int ret;

	if (!pdev->dev.of_node) {
		dev_err(&pdev->dev, "%s: No platform supplied from device tree\n", __func__);
		return -EINVAL;
	}

	pdata = devm_kzalloc(&pdev->dev,
			sizeof(struct msm_asoc_mach_data), GFP_KERNEL);
	if (!pdata)
		return -ENOMEM;

	card = populate_snd_card_dailinks(&pdev->dev);
	if (!card) {
		dev_err(&pdev->dev, "%s: Card uninitialized\n", __func__);
		ret = -EINVAL;
		goto err;
	}
	card->dev = &pdev->dev;
	platform_set_drvdata(pdev, card);
	snd_soc_card_set_drvdata(card, pdata);

	ret = snd_soc_of_parse_card_name(card, "qcom,model");
	if (ret) {
		dev_err(&pdev->dev, "%s: parse card name failed, err:%d\n",
			__func__, ret);
		goto err;
	}

	match = of_match_node(kona_asoc_machine_of_match,
			pdev->dev.of_node);
	if (!match) {
		dev_err(&pdev->dev, "%s: no matched codec is found.\n",
			__func__);
		goto err;
	}

	ret = msm_populate_dai_link_component_of_node(card);
	if (ret) {
		ret = -EPROBE_DEFER;
		goto err;
	}

	ret = devm_snd_soc_register_card(&pdev->dev, card);
	if (ret) {
		dev_err(&pdev->dev, "%s: snd_soc_register_card failed (%d)\n",
			__func__, ret);
		goto err;
	}
	dev_info(&pdev->dev, "%s: Sound card %s registered\n",
		 __func__, card->name);

	return 0;
err:
	devm_kfree(&pdev->dev, pdata);
	return ret;
}

static int msm_asoc_machine_remove(struct platform_device *pdev)
{
	struct snd_soc_card *card = platform_get_drvdata(pdev);

	snd_soc_unregister_card(card);
	return 0;
}

static struct platform_driver kona_asoc_machine_driver = {
	.driver = {
		.name = DRV_NAME,
		.owner = THIS_MODULE,
		.pm = &snd_soc_pm_ops,
		.of_match_table = kona_asoc_machine_of_match,
	},
	.probe = msm_asoc_machine_probe,
	.remove = msm_asoc_machine_remove,
};
module_platform_driver(kona_asoc_machine_driver);

MODULE_DESCRIPTION("ALSA SoC msm");
MODULE_LICENSE("GPL v2");
MODULE_ALIAS("platform:" DRV_NAME);
MODULE_DEVICE_TABLE(of, kona_asoc_machine_of_match);