[linux-2.6-block.git] / sound / soc / qcom / storm.c

// SPDX-License-Identifier: GPL-2.0-only
/*
 * Copyright (c) 2010-2011,2013-2015 The Linux Foundation. All rights reserved.
 *
 * storm.c -- ALSA SoC machine driver for QTi ipq806x-based Storm board
 */

#include <linux/device.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/mod_devicetable.h>
#include <linux/platform_device.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
#include <sound/soc.h>

#define STORM_SYSCLK_MULT			4

static int storm_ops_hw_params(struct snd_pcm_substream *substream,
		struct snd_pcm_hw_params *params)
{
	struct snd_soc_pcm_runtime *soc_runtime = substream->private_data;
	struct snd_soc_card *card = soc_runtime->card;
	snd_pcm_format_t format = params_format(params);
	unsigned int rate = params_rate(params);
	unsigned int sysclk_freq;
	int bitwidth, ret;

	bitwidth = snd_pcm_format_width(format);
	if (bitwidth < 0) {
		dev_err(card->dev, "invalid bit width given: %d\n", bitwidth);
		return bitwidth;
	}

	/*
	 * as the CPU DAI is the I2S bus master and no system clock is needed by
	 * the MAX98357a DAC, simply set the system clock to be a constant
	 * multiple of the bit clock for the clock divider
	 */
	sysclk_freq = rate * bitwidth * 2 * STORM_SYSCLK_MULT;

	ret = snd_soc_dai_set_sysclk(soc_runtime->cpu_dai, 0, sysclk_freq, 0);
	if (ret) {
		dev_err(card->dev, "error setting sysclk to %u: %d\n",
			sysclk_freq, ret);
		return ret;
	}

	return 0;
}

static const struct snd_soc_ops storm_soc_ops = {
	.hw_params	= storm_ops_hw_params,
};

SND_SOC_DAILINK_DEFS(hifi,
	DAILINK_COMP_ARRAY(COMP_EMPTY()),
	DAILINK_COMP_ARRAY(COMP_CODEC(NULL, "HiFi")),
	DAILINK_COMP_ARRAY(COMP_EMPTY()));

static struct snd_soc_dai_link storm_dai_link = {
	.name		= "Primary",
	.stream_name	= "Primary",
	.ops		= &storm_soc_ops,
	SND_SOC_DAILINK_REG(hifi),
};

static int storm_parse_of(struct snd_soc_card *card)
{
	struct snd_soc_dai_link *dai_link = card->dai_link;
	struct device_node *np = card->dev->of_node;

	dai_link->cpus->of_node = of_parse_phandle(np, "cpu", 0);
	if (!dai_link->cpus->of_node) {
		dev_err(card->dev, "error getting cpu phandle\n");
		return -EINVAL;
	}
	dai_link->platforms->of_node = dai_link->cpus->of_node;

	dai_link->codecs->of_node = of_parse_phandle(np, "codec", 0);
	if (!dai_link->codecs->of_node) {
		dev_err(card->dev, "error getting codec phandle\n");
		return -EINVAL;
	}

	return 0;
}

static int storm_platform_probe(struct platform_device *pdev)
{
	struct snd_soc_card *card;
	int ret;

	card = devm_kzalloc(&pdev->dev, sizeof(*card), GFP_KERNEL);
	if (!card)
		return -ENOMEM;

	card->dev = &pdev->dev;

	ret = snd_soc_of_parse_card_name(card, "qcom,model");
	if (ret) {
		dev_err(&pdev->dev, "error parsing card name: %d\n", ret);
		return ret;
	}

	card->dai_link	= &storm_dai_link;
	card->num_links	= 1;

	ret = storm_parse_of(card);
	if (ret) {
		dev_err(&pdev->dev, "error resolving dai links: %d\n", ret);
		return ret;
	}

	ret = devm_snd_soc_register_card(&pdev->dev, card);
	if (ret)
		dev_err(&pdev->dev, "error registering soundcard: %d\n", ret);

	return ret;

}

#ifdef CONFIG_OF
static const struct of_device_id storm_device_id[]  = {
	{ .compatible = "google,storm-audio" },
	{},
};
MODULE_DEVICE_TABLE(of, storm_device_id);
#endif

static struct platform_driver storm_platform_driver = {
	.driver = {
		.name = "storm-audio",
		.of_match_table =
			of_match_ptr(storm_device_id),
	},
	.probe = storm_platform_probe,
};
module_platform_driver(storm_platform_driver);

MODULE_DESCRIPTION("QTi IPQ806x-based Storm Machine Driver");
MODULE_LICENSE("GPL v2");
Commit	Line	Data
97fb5e8d	1	// SPDX-License-Identifier: GPL-2.0-only
79119c79 KW	2	/*
	3	* Copyright (c) 2010-2011,2013-2015 The Linux Foundation. All rights reserved.
	4	*
79119c79 KW	5	* storm.c -- ALSA SoC machine driver for QTi ipq806x-based Storm board
	6	*/
	7
	8	#include <linux/device.h>
	9	#include <linux/module.h>
	10	#include <linux/of.h>
	11	#include <linux/mod_devicetable.h>
	12	#include <linux/platform_device.h>
	13	#include <sound/pcm.h>
	14	#include <sound/pcm_params.h>
	15	#include <sound/soc.h>
	16
	17	#define STORM_SYSCLK_MULT 4
	18
	19	static int storm_ops_hw_params(struct snd_pcm_substream *substream,
	20	struct snd_pcm_hw_params *params)
	21	{
	22	struct snd_soc_pcm_runtime *soc_runtime = substream->private_data;
	23	struct snd_soc_card *card = soc_runtime->card;
	24	snd_pcm_format_t format = params_format(params);
	25	unsigned int rate = params_rate(params);
	26	unsigned int sysclk_freq;
	27	int bitwidth, ret;
	28
	29	bitwidth = snd_pcm_format_width(format);
	30	if (bitwidth < 0) {
b6e643ad	31	dev_err(card->dev, "invalid bit width given: %d\n", bitwidth);
79119c79 KW	32	return bitwidth;
	33	}
	34
	35	/*
	36	* as the CPU DAI is the I2S bus master and no system clock is needed by
	37	* the MAX98357a DAC, simply set the system clock to be a constant
	38	* multiple of the bit clock for the clock divider
	39	*/
	40	sysclk_freq = rate * bitwidth * 2 * STORM_SYSCLK_MULT;
	41
	42	ret = snd_soc_dai_set_sysclk(soc_runtime->cpu_dai, 0, sysclk_freq, 0);
	43	if (ret) {
b6e643ad BA	44	dev_err(card->dev, "error setting sysclk to %u: %d\n",
b6e643ad BA	45	sysclk_freq, ret);
79119c79 KW	46	return ret;
	47	}
	48
	49	return 0;
	50	}
	51
251fc7a5	52	static const struct snd_soc_ops storm_soc_ops = {
79119c79 KW	53	.hw_params = storm_ops_hw_params,
	54	};
	55
fa350b77 KM	56	SND_SOC_DAILINK_DEFS(hifi,
fa350b77 KM	57	DAILINK_COMP_ARRAY(COMP_EMPTY()),
9522e947 KM	58	DAILINK_COMP_ARRAY(COMP_CODEC(NULL, "HiFi")),
9522e947 KM	59	DAILINK_COMP_ARRAY(COMP_EMPTY()));
fa350b77	60
79119c79 KW	61	static struct snd_soc_dai_link storm_dai_link = {
	62	.name = "Primary",
	63	.stream_name = "Primary",
79119c79	64	.ops = &storm_soc_ops,
fa350b77	65	SND_SOC_DAILINK_REG(hifi),
79119c79 KW	66	};
79119c79 KW	67
79119c79 KW	68	static int storm_parse_of(struct snd_soc_card *card)
	69	{
	70	struct snd_soc_dai_link *dai_link = card->dai_link;
	71	struct device_node *np = card->dev->of_node;
	72
fa350b77 KM	73	dai_link->cpus->of_node = of_parse_phandle(np, "cpu", 0);
fa350b77 KM	74	if (!dai_link->cpus->of_node) {
b6e643ad	75	dev_err(card->dev, "error getting cpu phandle\n");
79119c79 KW	76	return -EINVAL;
79119c79 KW	77	}
9522e947	78	dai_link->platforms->of_node = dai_link->cpus->of_node;
79119c79	79
fa350b77 KM	80	dai_link->codecs->of_node = of_parse_phandle(np, "codec", 0);
fa350b77 KM	81	if (!dai_link->codecs->of_node) {
b6e643ad	82	dev_err(card->dev, "error getting codec phandle\n");
79119c79 KW	83	return -EINVAL;
	84	}
	85
	86	return 0;
	87	}
	88
	89	static int storm_platform_probe(struct platform_device *pdev)
	90	{
21e904bc	91	struct snd_soc_card *card;
79119c79 KW	92	int ret;
79119c79 KW	93
21e904bc SK	94	card = devm_kzalloc(&pdev->dev, sizeof(*card), GFP_KERNEL);
	95	if (!card)
	96	return -ENOMEM;
	97
79119c79	98	card->dev = &pdev->dev;
79119c79 KW	99
	100	ret = snd_soc_of_parse_card_name(card, "qcom,model");
	101	if (ret) {
b6e643ad	102	dev_err(&pdev->dev, "error parsing card name: %d\n", ret);
79119c79 KW	103	return ret;
	104	}
	105
	106	card->dai_link = &storm_dai_link;
	107	card->num_links = 1;
	108
	109	ret = storm_parse_of(card);
	110	if (ret) {
b6e643ad	111	dev_err(&pdev->dev, "error resolving dai links: %d\n", ret);
79119c79 KW	112	return ret;
	113	}
	114
	115	ret = devm_snd_soc_register_card(&pdev->dev, card);
2682c7c7	116	if (ret)
b6e643ad	117	dev_err(&pdev->dev, "error registering soundcard: %d\n", ret);
79119c79	118
2682c7c7 SK	119	return ret;
2682c7c7 SK	120
79119c79 KW	121	}
	122
	123	#ifdef CONFIG_OF
	124	static const struct of_device_id storm_device_id[] = {
	125	{ .compatible = "google,storm-audio" },
	126	{},
	127	};
	128	MODULE_DEVICE_TABLE(of, storm_device_id);
	129	#endif
	130
	131	static struct platform_driver storm_platform_driver = {
	132	.driver = {
	133	.name = "storm-audio",
	134	.of_match_table =
	135	of_match_ptr(storm_device_id),
	136	},
	137	.probe = storm_platform_probe,
	138	};
	139	module_platform_driver(storm_platform_driver);
	140
	141	MODULE_DESCRIPTION("QTi IPQ806x-based Storm Machine Driver");
	142	MODULE_LICENSE("GPL v2");