[mirror_ubuntu-bionic-kernel.git] / sound / soc / atmel / atmel_wm8904.c

/*
 * atmel_wm8904 - Atmel ASoC driver for boards with WM8904 codec.
 *
 * Copyright (C) 2012 Atmel
 *
 * Author: Bo Shen <voice.shen@atmel.com>
 *
 * GPLv2 or later
 */

#include <linux/clk.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/of_device.h>

#include <sound/soc.h>

#include "../codecs/wm8904.h"
#include "atmel_ssc_dai.h"

static const struct snd_soc_dapm_widget atmel_asoc_wm8904_dapm_widgets[] = {
	SND_SOC_DAPM_HP("Headphone Jack", NULL),
	SND_SOC_DAPM_MIC("Mic", NULL),
	SND_SOC_DAPM_LINE("Line In Jack", NULL),
};

static int atmel_asoc_wm8904_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 *codec_dai = rtd->codec_dai;
	int ret;

	ret = snd_soc_dai_set_pll(codec_dai, WM8904_FLL_MCLK, WM8904_FLL_MCLK,
		32768, params_rate(params) * 256);
	if (ret < 0) {
		pr_err("%s - failed to set wm8904 codec PLL.", __func__);
		return ret;
	}

	/*
	 * As here wm8904 use FLL output as its system clock
	 * so calling set_sysclk won't care freq parameter
	 * then we pass 0
	 */
	ret = snd_soc_dai_set_sysclk(codec_dai, WM8904_CLK_FLL,
			0, SND_SOC_CLOCK_IN);
	if (ret < 0) {
		pr_err("%s -failed to set wm8904 SYSCLK\n", __func__);
		return ret;
	}

	return 0;
}

static const struct snd_soc_ops atmel_asoc_wm8904_ops = {
	.hw_params = atmel_asoc_wm8904_hw_params,
};

static struct snd_soc_dai_link atmel_asoc_wm8904_dailink = {
	.name = "WM8904",
	.stream_name = "WM8904 PCM",
	.codec_dai_name = "wm8904-hifi",
	.dai_fmt = SND_SOC_DAIFMT_I2S
		| SND_SOC_DAIFMT_NB_NF
		| SND_SOC_DAIFMT_CBM_CFM,
	.ops = &atmel_asoc_wm8904_ops,
};

static struct snd_soc_card atmel_asoc_wm8904_card = {
	.name = "atmel_asoc_wm8904",
	.owner = THIS_MODULE,
	.dai_link = &atmel_asoc_wm8904_dailink,
	.num_links = 1,
	.dapm_widgets = atmel_asoc_wm8904_dapm_widgets,
	.num_dapm_widgets = ARRAY_SIZE(atmel_asoc_wm8904_dapm_widgets),
	.fully_routed = true,
};

static int atmel_asoc_wm8904_dt_init(struct platform_device *pdev)
{
	struct device_node *np = pdev->dev.of_node;
	struct device_node *codec_np, *cpu_np;
	struct snd_soc_card *card = &atmel_asoc_wm8904_card;
	struct snd_soc_dai_link *dailink = &atmel_asoc_wm8904_dailink;
	int ret;

	if (!np) {
		dev_err(&pdev->dev, "only device tree supported\n");
		return -EINVAL;
	}

	ret = snd_soc_of_parse_card_name(card, "atmel,model");
	if (ret) {
		dev_err(&pdev->dev, "failed to parse card name\n");
		return ret;
	}

	ret = snd_soc_of_parse_audio_routing(card, "atmel,audio-routing");
	if (ret) {
		dev_err(&pdev->dev, "failed to parse audio routing\n");
		return ret;
	}

	cpu_np = of_parse_phandle(np, "atmel,ssc-controller", 0);
	if (!cpu_np) {
		dev_err(&pdev->dev, "failed to get dai and pcm info\n");
		ret = -EINVAL;
		return ret;
	}
	dailink->cpu_of_node = cpu_np;
	dailink->platform_of_node = cpu_np;
	of_node_put(cpu_np);

	codec_np = of_parse_phandle(np, "atmel,audio-codec", 0);
	if (!codec_np) {
		dev_err(&pdev->dev, "failed to get codec info\n");
		ret = -EINVAL;
		return ret;
	}
	dailink->codec_of_node = codec_np;
	of_node_put(codec_np);

	return 0;
}

static int atmel_asoc_wm8904_probe(struct platform_device *pdev)
{
	struct snd_soc_card *card = &atmel_asoc_wm8904_card;
	struct snd_soc_dai_link *dailink = &atmel_asoc_wm8904_dailink;
	int id, ret;

	card->dev = &pdev->dev;
	ret = atmel_asoc_wm8904_dt_init(pdev);
	if (ret) {
		dev_err(&pdev->dev, "failed to init dt info\n");
		return ret;
	}

	id = of_alias_get_id((struct device_node *)dailink->cpu_of_node, "ssc");
	ret = atmel_ssc_set_audio(id);
	if (ret != 0) {
		dev_err(&pdev->dev, "failed to set SSC %d for audio\n", id);
		return ret;
	}

	ret = snd_soc_register_card(card);
	if (ret) {
		dev_err(&pdev->dev, "snd_soc_register_card failed\n");
		goto err_set_audio;
	}

	return 0;

err_set_audio:
	atmel_ssc_put_audio(id);
	return ret;
}

static int atmel_asoc_wm8904_remove(struct platform_device *pdev)
{
	struct snd_soc_card *card = platform_get_drvdata(pdev);
	struct snd_soc_dai_link *dailink = &atmel_asoc_wm8904_dailink;
	int id;

	id = of_alias_get_id((struct device_node *)dailink->cpu_of_node, "ssc");

	snd_soc_unregister_card(card);
	atmel_ssc_put_audio(id);

	return 0;
}

#ifdef CONFIG_OF
static const struct of_device_id atmel_asoc_wm8904_dt_ids[] = {
	{ .compatible = "atmel,asoc-wm8904", },
	{ }
};
MODULE_DEVICE_TABLE(of, atmel_asoc_wm8904_dt_ids);
#endif

static struct platform_driver atmel_asoc_wm8904_driver = {
	.driver = {
		.name = "atmel-wm8904-audio",
		.of_match_table = of_match_ptr(atmel_asoc_wm8904_dt_ids),
		.pm		= &snd_soc_pm_ops,
	},
	.probe = atmel_asoc_wm8904_probe,
	.remove = atmel_asoc_wm8904_remove,
};

module_platform_driver(atmel_asoc_wm8904_driver);

/* Module information */
MODULE_AUTHOR("Bo Shen <voice.shen@atmel.com>");
MODULE_DESCRIPTION("ALSA SoC machine driver for Atmel EK with WM8904 codec");
MODULE_LICENSE("GPL");
Commit	Line	Data
52f19b14 BS	1	/*
	2	* atmel_wm8904 - Atmel ASoC driver for boards with WM8904 codec.
	3	*
	4	* Copyright (C) 2012 Atmel
	5	*
	6	* Author: Bo Shen <voice.shen@atmel.com>
	7	*
	8	* GPLv2 or later
	9	*/
	10
	11	#include <linux/clk.h>
	12	#include <linux/module.h>
	13	#include <linux/of.h>
	14	#include <linux/of_device.h>
52f19b14 BS	15
	16	#include <sound/soc.h>
	17
	18	#include "../codecs/wm8904.h"
	19	#include "atmel_ssc_dai.h"
	20
52f19b14 BS	21	static const struct snd_soc_dapm_widget atmel_asoc_wm8904_dapm_widgets[] = {
	22	SND_SOC_DAPM_HP("Headphone Jack", NULL),
	23	SND_SOC_DAPM_MIC("Mic", NULL),
	24	SND_SOC_DAPM_LINE("Line In Jack", NULL),
	25	};
	26
	27	static int atmel_asoc_wm8904_hw_params(struct snd_pcm_substream *substream,
	28	struct snd_pcm_hw_params *params)
	29	{
	30	struct snd_soc_pcm_runtime *rtd = substream->private_data;
	31	struct snd_soc_dai *codec_dai = rtd->codec_dai;
	32	int ret;
	33
	34	ret = snd_soc_dai_set_pll(codec_dai, WM8904_FLL_MCLK, WM8904_FLL_MCLK,
	35	32768, params_rate(params) * 256);
	36	if (ret < 0) {
	37	pr_err("%s - failed to set wm8904 codec PLL.", __func__);
	38	return ret;
	39	}
	40
	41	/*
	42	* As here wm8904 use FLL output as its system clock
	43	* so calling set_sysclk won't care freq parameter
	44	* then we pass 0
	45	*/
	46	ret = snd_soc_dai_set_sysclk(codec_dai, WM8904_CLK_FLL,
	47	0, SND_SOC_CLOCK_IN);
	48	if (ret < 0) {
	49	pr_err("%s -failed to set wm8904 SYSCLK\n", __func__);
	50	return ret;
	51	}
	52
	53	return 0;
	54	}
	55
28549313	56	static const struct snd_soc_ops atmel_asoc_wm8904_ops = {
52f19b14 BS	57	.hw_params = atmel_asoc_wm8904_hw_params,
	58	};
	59
52f19b14 BS	60	static struct snd_soc_dai_link atmel_asoc_wm8904_dailink = {
	61	.name = "WM8904",
	62	.stream_name = "WM8904 PCM",
	63	.codec_dai_name = "wm8904-hifi",
	64	.dai_fmt = SND_SOC_DAIFMT_I2S
	65	\| SND_SOC_DAIFMT_NB_NF
	66	\| SND_SOC_DAIFMT_CBM_CFM,
	67	.ops = &atmel_asoc_wm8904_ops,
	68	};
	69
	70	static struct snd_soc_card atmel_asoc_wm8904_card = {
	71	.name = "atmel_asoc_wm8904",
	72	.owner = THIS_MODULE,
52f19b14 BS	73	.dai_link = &atmel_asoc_wm8904_dailink,
	74	.num_links = 1,
	75	.dapm_widgets = atmel_asoc_wm8904_dapm_widgets,
	76	.num_dapm_widgets = ARRAY_SIZE(atmel_asoc_wm8904_dapm_widgets),
	77	.fully_routed = true,
	78	};
	79
	80	static int atmel_asoc_wm8904_dt_init(struct platform_device *pdev)
	81	{
	82	struct device_node *np = pdev->dev.of_node;
	83	struct device_node codec_np, cpu_np;
	84	struct snd_soc_card *card = &atmel_asoc_wm8904_card;
	85	struct snd_soc_dai_link *dailink = &atmel_asoc_wm8904_dailink;
	86	int ret;
	87
	88	if (!np) {
	89	dev_err(&pdev->dev, "only device tree supported\n");
	90	return -EINVAL;
	91	}
	92
	93	ret = snd_soc_of_parse_card_name(card, "atmel,model");
	94	if (ret) {
	95	dev_err(&pdev->dev, "failed to parse card name\n");
	96	return ret;
	97	}
	98
	99	ret = snd_soc_of_parse_audio_routing(card, "atmel,audio-routing");
	100	if (ret) {
	101	dev_err(&pdev->dev, "failed to parse audio routing\n");
	102	return ret;
	103	}
	104
	105	cpu_np = of_parse_phandle(np, "atmel,ssc-controller", 0);
	106	if (!cpu_np) {
	107	dev_err(&pdev->dev, "failed to get dai and pcm info\n");
	108	ret = -EINVAL;
	109	return ret;
	110	}
	111	dailink->cpu_of_node = cpu_np;
	112	dailink->platform_of_node = cpu_np;
	113	of_node_put(cpu_np);
	114
	115	codec_np = of_parse_phandle(np, "atmel,audio-codec", 0);
	116	if (!codec_np) {
	117	dev_err(&pdev->dev, "failed to get codec info\n");
	118	ret = -EINVAL;
	119	return ret;
	120	}
	121	dailink->codec_of_node = codec_np;
	122	of_node_put(codec_np);
	123
	124	return 0;
	125	}
	126
	127	static int atmel_asoc_wm8904_probe(struct platform_device *pdev)
	128	{
	129	struct snd_soc_card *card = &atmel_asoc_wm8904_card;
	130	struct snd_soc_dai_link *dailink = &atmel_asoc_wm8904_dailink;
52f19b14 BS	131	int id, ret;
52f19b14 BS	132
52f19b14 BS	133	card->dev = &pdev->dev;
	134	ret = atmel_asoc_wm8904_dt_init(pdev);
	135	if (ret) {
	136	dev_err(&pdev->dev, "failed to init dt info\n");
	137	return ret;
	138	}
	139
	140	id = of_alias_get_id((struct device_node *)dailink->cpu_of_node, "ssc");
	141	ret = atmel_ssc_set_audio(id);
	142	if (ret != 0) {
	143	dev_err(&pdev->dev, "failed to set SSC %d for audio\n", id);
	144	return ret;
	145	}
	146
52f19b14 BS	147	ret = snd_soc_register_card(card);
	148	if (ret) {
	149	dev_err(&pdev->dev, "snd_soc_register_card failed\n");
	150	goto err_set_audio;
	151	}
	152
	153	return 0;
	154
	155	err_set_audio:
	156	atmel_ssc_put_audio(id);
	157	return ret;
	158	}
	159
	160	static int atmel_asoc_wm8904_remove(struct platform_device *pdev)
	161	{
	162	struct snd_soc_card *card = platform_get_drvdata(pdev);
	163	struct snd_soc_dai_link *dailink = &atmel_asoc_wm8904_dailink;
	164	int id;
	165
	166	id = of_alias_get_id((struct device_node *)dailink->cpu_of_node, "ssc");
	167
	168	snd_soc_unregister_card(card);
	169	atmel_ssc_put_audio(id);
	170
	171	return 0;
	172	}
	173
	174	#ifdef CONFIG_OF
	175	static const struct of_device_id atmel_asoc_wm8904_dt_ids[] = {
	176	{ .compatible = "atmel,asoc-wm8904", },
	177	{ }
	178	};
aab7826f	179	MODULE_DEVICE_TABLE(of, atmel_asoc_wm8904_dt_ids);
52f19b14 BS	180	#endif
	181
	182	static struct platform_driver atmel_asoc_wm8904_driver = {
	183	.driver = {
	184	.name = "atmel-wm8904-audio",
52f19b14	185	.of_match_table = of_match_ptr(atmel_asoc_wm8904_dt_ids),
50860e1d	186	.pm = &snd_soc_pm_ops,
52f19b14 BS	187	},
	188	.probe = atmel_asoc_wm8904_probe,
	189	.remove = atmel_asoc_wm8904_remove,
	190	};
	191
	192	module_platform_driver(atmel_asoc_wm8904_driver);
	193
	194	/* Module information */
	195	MODULE_AUTHOR("Bo Shen <voice.shen@atmel.com>");
	196	MODULE_DESCRIPTION("ALSA SoC machine driver for Atmel EK with WM8904 codec");
	197	MODULE_LICENSE("GPL");