[linux-2.6-block.git] / sound / soc / codecs / pcm1789.c

// SPDX-License-Identifier: GPL-2.0
// Audio driver for PCM1789
// Copyright (C) 2018 Bootlin
// Mylène Josserand <mylene.josserand@bootlin.com>

#include <linux/gpio/consumer.h>
#include <linux/module.h>
#include <linux/workqueue.h>

#include <sound/pcm_params.h>
#include <sound/soc.h>
#include <sound/tlv.h>

#include "pcm1789.h"

#define PCM1789_MUTE_CONTROL	0x10
#define PCM1789_FMT_CONTROL	0x11
#define PCM1789_SOFT_MUTE	0x14
#define PCM1789_DAC_VOL_LEFT	0x18
#define PCM1789_DAC_VOL_RIGHT	0x19

#define PCM1789_FMT_MASK	0x07
#define PCM1789_MUTE_MASK	0x03
#define PCM1789_MUTE_SRET	0x06

struct pcm1789_private {
	struct regmap *regmap;
	unsigned int format;
	unsigned int rate;
	struct gpio_desc *reset;
	struct work_struct work;
	struct device *dev;
};

static const struct reg_default pcm1789_reg_defaults[] = {
	{ PCM1789_FMT_CONTROL, 0x00 },
	{ PCM1789_SOFT_MUTE, 0x00 },
	{ PCM1789_DAC_VOL_LEFT, 0xff },
	{ PCM1789_DAC_VOL_RIGHT, 0xff },
};

static bool pcm1789_accessible_reg(struct device *dev, unsigned int reg)
{
	return reg >= PCM1789_MUTE_CONTROL && reg <= PCM1789_DAC_VOL_RIGHT;
}

static bool pcm1789_writeable_reg(struct device *dev, unsigned int reg)
{
	return pcm1789_accessible_reg(dev, reg);
}

static int pcm1789_set_dai_fmt(struct snd_soc_dai *codec_dai,
			       unsigned int format)
{
	struct snd_soc_component *component = codec_dai->component;
	struct pcm1789_private *priv = snd_soc_component_get_drvdata(component);

	priv->format = format;

	return 0;
}

static int pcm1789_digital_mute(struct snd_soc_dai *codec_dai, int mute)
{
	struct snd_soc_component *component = codec_dai->component;
	struct pcm1789_private *priv = snd_soc_component_get_drvdata(component);

	return regmap_update_bits(priv->regmap, PCM1789_SOFT_MUTE,
				  PCM1789_MUTE_MASK,
				  mute ? 0 : PCM1789_MUTE_MASK);
}

static int pcm1789_hw_params(struct snd_pcm_substream *substream,
			     struct snd_pcm_hw_params *params,
			     struct snd_soc_dai *codec_dai)
{
	struct snd_soc_component *component = codec_dai->component;
	struct pcm1789_private *priv = snd_soc_component_get_drvdata(component);
	int val = 0, ret;

	priv->rate = params_rate(params);

	switch (priv->format & SND_SOC_DAIFMT_FORMAT_MASK) {
	case SND_SOC_DAIFMT_RIGHT_J:
		switch (params_width(params)) {
		case 24:
			val = 2;
			break;
		case 16:
			val = 3;
			break;
		default:
			return -EINVAL;
		}
		break;
	case SND_SOC_DAIFMT_I2S:
		switch (params_width(params)) {
		case 16:
		case 24:
		case 32:
			val = 0;
			break;
		default:
			return -EINVAL;
		}
		break;
	case SND_SOC_DAIFMT_LEFT_J:
		switch (params_width(params)) {
		case 16:
		case 24:
		case 32:
			val = 1;
			break;
		default:
			return -EINVAL;
		}
		break;
	default:
		dev_err(component->dev, "Invalid DAI format\n");
		return -EINVAL;
	}

	ret = regmap_update_bits(priv->regmap, PCM1789_FMT_CONTROL,
				 PCM1789_FMT_MASK, val);
	if (ret < 0)
		return ret;

	return 0;
}

static void pcm1789_work_queue(struct work_struct *work)
{
	struct pcm1789_private *priv = container_of(work,
						    struct pcm1789_private,
						    work);

	/* Perform a software reset to remove codec from desynchronized state */
	if (regmap_update_bits(priv->regmap, PCM1789_MUTE_CONTROL,
			       0x3 << PCM1789_MUTE_SRET, 0) < 0)
		dev_err(priv->dev, "Error while setting SRET");
}

static int pcm1789_trigger(struct snd_pcm_substream *substream, int cmd,
			   struct snd_soc_dai *dai)
{
	struct snd_soc_component *component = dai->component;
	struct pcm1789_private *priv = snd_soc_component_get_drvdata(component);
	int ret = 0;

	switch (cmd) {
	case SNDRV_PCM_TRIGGER_START:
	case SNDRV_PCM_TRIGGER_RESUME:
	case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
		schedule_work(&priv->work);
		break;
	case SNDRV_PCM_TRIGGER_STOP:
	case SNDRV_PCM_TRIGGER_SUSPEND:
	case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
		break;
	default:
		ret = -EINVAL;
	}

	return ret;
}

static const struct snd_soc_dai_ops pcm1789_dai_ops = {
	.set_fmt	= pcm1789_set_dai_fmt,
	.hw_params	= pcm1789_hw_params,
	.digital_mute	= pcm1789_digital_mute,
	.trigger	= pcm1789_trigger,
};

static const DECLARE_TLV_DB_SCALE(pcm1789_dac_tlv, -12000, 50, 1);

static const struct snd_kcontrol_new pcm1789_controls[] = {
	SOC_DOUBLE_R_RANGE_TLV("DAC Playback Volume", PCM1789_DAC_VOL_LEFT,
			       PCM1789_DAC_VOL_RIGHT, 0, 0xf, 0xff, 0,
			       pcm1789_dac_tlv),
};

static const struct snd_soc_dapm_widget pcm1789_dapm_widgets[] = {
	SND_SOC_DAPM_OUTPUT("IOUTL+"),
	SND_SOC_DAPM_OUTPUT("IOUTL-"),
	SND_SOC_DAPM_OUTPUT("IOUTR+"),
	SND_SOC_DAPM_OUTPUT("IOUTR-"),
};

static const struct snd_soc_dapm_route pcm1789_dapm_routes[] = {
	{ "IOUTL+", NULL, "Playback" },
	{ "IOUTL-", NULL, "Playback" },
	{ "IOUTR+", NULL, "Playback" },
	{ "IOUTR-", NULL, "Playback" },
};

static struct snd_soc_dai_driver pcm1789_dai = {
	.name = "pcm1789-hifi",
	.playback = {
		.stream_name = "Playback",
		.channels_min = 2,
		.channels_max = 2,
		.rates = SNDRV_PCM_RATE_CONTINUOUS,
		.rate_min = 10000,
		.rate_max = 200000,
		.formats = PCM1789_FORMATS,
	},
	.ops = &pcm1789_dai_ops,
};

const struct regmap_config pcm1789_regmap_config = {
	.reg_bits		= 8,
	.val_bits		= 8,
	.max_register		= PCM1789_DAC_VOL_RIGHT,
	.reg_defaults		= pcm1789_reg_defaults,
	.num_reg_defaults	= ARRAY_SIZE(pcm1789_reg_defaults),
	.writeable_reg		= pcm1789_writeable_reg,
	.readable_reg		= pcm1789_accessible_reg,
};
EXPORT_SYMBOL_GPL(pcm1789_regmap_config);

static const struct snd_soc_component_driver soc_component_dev_pcm1789 = {
	.controls		= pcm1789_controls,
	.num_controls		= ARRAY_SIZE(pcm1789_controls),
	.dapm_widgets		= pcm1789_dapm_widgets,
	.num_dapm_widgets	= ARRAY_SIZE(pcm1789_dapm_widgets),
	.dapm_routes		= pcm1789_dapm_routes,
	.num_dapm_routes	= ARRAY_SIZE(pcm1789_dapm_routes),
	.idle_bias_on		= 1,
	.use_pmdown_time	= 1,
	.endianness		= 1,
	.non_legacy_dai_naming	= 1,
};

int pcm1789_common_init(struct device *dev, struct regmap *regmap)
{
	struct pcm1789_private *pcm1789;

	pcm1789 = devm_kzalloc(dev, sizeof(struct pcm1789_private),
			       GFP_KERNEL);
	if (!pcm1789)
		return -ENOMEM;

	pcm1789->regmap = regmap;
	pcm1789->dev = dev;
	dev_set_drvdata(dev, pcm1789);

	pcm1789->reset = devm_gpiod_get_optional(dev, "reset", GPIOD_OUT_HIGH);
	if (IS_ERR(pcm1789->reset))
		return PTR_ERR(pcm1789->reset);

	gpiod_set_value_cansleep(pcm1789->reset, 0);
	msleep(300);

	INIT_WORK(&pcm1789->work, pcm1789_work_queue);

	return devm_snd_soc_register_component(dev, &soc_component_dev_pcm1789,
					       &pcm1789_dai, 1);
}
EXPORT_SYMBOL_GPL(pcm1789_common_init);

int pcm1789_common_exit(struct device *dev)
{
	struct pcm1789_private *priv = dev_get_drvdata(dev);

	flush_work(&priv->work);

	return 0;
}
EXPORT_SYMBOL_GPL(pcm1789_common_exit);

MODULE_DESCRIPTION("ASoC PCM1789 driver");
MODULE_AUTHOR("Mylène Josserand <mylene.josserand@free-electrons.com>");
MODULE_LICENSE("GPL");
Commit	Line	Data
4ae340d1 MJ	1	// SPDX-License-Identifier: GPL-2.0
	2	// Audio driver for PCM1789
	3	// Copyright (C) 2018 Bootlin
	4	// Mylène Josserand <mylene.josserand@bootlin.com>
	5
3217004a	6	#include <linux/gpio/consumer.h>
4ae340d1 MJ	7	#include <linux/module.h>
	8	#include <linux/workqueue.h>
	9
	10	#include <sound/pcm_params.h>
	11	#include <sound/soc.h>
	12	#include <sound/tlv.h>
	13
	14	#include "pcm1789.h"
	15
	16	#define PCM1789_MUTE_CONTROL 0x10
	17	#define PCM1789_FMT_CONTROL 0x11
	18	#define PCM1789_SOFT_MUTE 0x14
	19	#define PCM1789_DAC_VOL_LEFT 0x18
	20	#define PCM1789_DAC_VOL_RIGHT 0x19
	21
	22	#define PCM1789_FMT_MASK 0x07
	23	#define PCM1789_MUTE_MASK 0x03
	24	#define PCM1789_MUTE_SRET 0x06
	25
	26	struct pcm1789_private {
	27	struct regmap *regmap;
	28	unsigned int format;
	29	unsigned int rate;
	30	struct gpio_desc *reset;
	31	struct work_struct work;
	32	struct device *dev;
	33	};
	34
	35	static const struct reg_default pcm1789_reg_defaults[] = {
	36	{ PCM1789_FMT_CONTROL, 0x00 },
	37	{ PCM1789_SOFT_MUTE, 0x00 },
	38	{ PCM1789_DAC_VOL_LEFT, 0xff },
	39	{ PCM1789_DAC_VOL_RIGHT, 0xff },
	40	};
	41
	42	static bool pcm1789_accessible_reg(struct device *dev, unsigned int reg)
	43	{
	44	return reg >= PCM1789_MUTE_CONTROL && reg <= PCM1789_DAC_VOL_RIGHT;
	45	}
	46
	47	static bool pcm1789_writeable_reg(struct device *dev, unsigned int reg)
	48	{
	49	return pcm1789_accessible_reg(dev, reg);
	50	}
	51
	52	static int pcm1789_set_dai_fmt(struct snd_soc_dai *codec_dai,
	53	unsigned int format)
	54	{
	55	struct snd_soc_component *component = codec_dai->component;
	56	struct pcm1789_private *priv = snd_soc_component_get_drvdata(component);
	57
	58	priv->format = format;
	59
	60	return 0;
	61	}
	62
	63	static int pcm1789_digital_mute(struct snd_soc_dai *codec_dai, int mute)
	64	{
	65	struct snd_soc_component *component = codec_dai->component;
	66	struct pcm1789_private *priv = snd_soc_component_get_drvdata(component);
	67
	68	return regmap_update_bits(priv->regmap, PCM1789_SOFT_MUTE,
	69	PCM1789_MUTE_MASK,
	70	mute ? 0 : PCM1789_MUTE_MASK);
71	}
72
73	static int pcm1789_hw_params(struct snd_pcm_substream *substream,
74	struct snd_pcm_hw_params *params,
75	struct snd_soc_dai *codec_dai)
76	{
77	struct snd_soc_component *component = codec_dai->component;
78	struct pcm1789_private *priv = snd_soc_component_get_drvdata(component);
79	int val = 0, ret;
80
81	priv->rate = params_rate(params);
82
83	switch (priv->format & SND_SOC_DAIFMT_FORMAT_MASK) {
84	case SND_SOC_DAIFMT_RIGHT_J:
85	switch (params_width(params)) {
86	case 24:
87	val = 2;
88	break;
89	case 16:
90	val = 3;
91	break;
92	default:
93	return -EINVAL;
94	}
95	break;
96	case SND_SOC_DAIFMT_I2S:
97	switch (params_width(params)) {
98	case 16:
99	case 24:
100	case 32:
101	val = 0;
102	break;
103	default:
104	return -EINVAL;
105	}
106	break;
107	case SND_SOC_DAIFMT_LEFT_J:
108	switch (params_width(params)) {
109	case 16:
110	case 24:
111	case 32:
112	val = 1;
113	break;
114	default:
115	return -EINVAL;
116	}
117	break;
118	default:
119	dev_err(component->dev, "Invalid DAI format\n");
120	return -EINVAL;
121	}
122
123	ret = regmap_update_bits(priv->regmap, PCM1789_FMT_CONTROL,
124	PCM1789_FMT_MASK, val);
125	if (ret < 0)
126	return ret;
127
128	return 0;
129	}
130
131	static void pcm1789_work_queue(struct work_struct *work)
132	{
133	struct pcm1789_private *priv = container_of(work,
134	struct pcm1789_private,
135	work);
136
137	/* Perform a software reset to remove codec from desynchronized state */
138	if (regmap_update_bits(priv->regmap, PCM1789_MUTE_CONTROL,
139	0x3 << PCM1789_MUTE_SRET, 0) < 0)
140	dev_err(priv->dev, "Error while setting SRET");
141	}
142
143	static int pcm1789_trigger(struct snd_pcm_substream *substream, int cmd,
144	struct snd_soc_dai *dai)
145	{
146	struct snd_soc_component *component = dai->component;
147	struct pcm1789_private *priv = snd_soc_component_get_drvdata(component);
148	int ret = 0;
149
150	switch (cmd) {
151	case SNDRV_PCM_TRIGGER_START:
152	case SNDRV_PCM_TRIGGER_RESUME:
153	case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
154	schedule_work(&priv->work);
155	break;
156	case SNDRV_PCM_TRIGGER_STOP:
157	case SNDRV_PCM_TRIGGER_SUSPEND:
158	case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
159	break;
160	default:
161	ret = -EINVAL;
162	}
163
164	return ret;
165	}
166
167	static const struct snd_soc_dai_ops pcm1789_dai_ops = {
168	.set_fmt = pcm1789_set_dai_fmt,
169	.hw_params = pcm1789_hw_params,
170	.digital_mute = pcm1789_digital_mute,
171	.trigger = pcm1789_trigger,
172	};
173
174	static const DECLARE_TLV_DB_SCALE(pcm1789_dac_tlv, -12000, 50, 1);
175
176	static const struct snd_kcontrol_new pcm1789_controls[] = {
177	SOC_DOUBLE_R_RANGE_TLV("DAC Playback Volume", PCM1789_DAC_VOL_LEFT,
178	PCM1789_DAC_VOL_RIGHT, 0, 0xf, 0xff, 0,
179	pcm1789_dac_tlv),
180	};
181
182	static const struct snd_soc_dapm_widget pcm1789_dapm_widgets[] = {
183	SND_SOC_DAPM_OUTPUT("IOUTL+"),
184	SND_SOC_DAPM_OUTPUT("IOUTL-"),
185	SND_SOC_DAPM_OUTPUT("IOUTR+"),
186	SND_SOC_DAPM_OUTPUT("IOUTR-"),
187	};
188
189	static const struct snd_soc_dapm_route pcm1789_dapm_routes[] = {
190	{ "IOUTL+", NULL, "Playback" },
191	{ "IOUTL-", NULL, "Playback" },
192	{ "IOUTR+", NULL, "Playback" },
193	{ "IOUTR-", NULL, "Playback" },
194	};
195
196	static struct snd_soc_dai_driver pcm1789_dai = {
197	.name = "pcm1789-hifi",
198	.playback = {
199	.stream_name = "Playback",
200	.channels_min = 2,
201	.channels_max = 2,
202	.rates = SNDRV_PCM_RATE_CONTINUOUS,
203	.rate_min = 10000,
204	.rate_max = 200000,
205	.formats = PCM1789_FORMATS,
206	},
207	.ops = &pcm1789_dai_ops,
208	};
209
210	const struct regmap_config pcm1789_regmap_config = {
211	.reg_bits = 8,
212	.val_bits = 8,
213	.max_register = PCM1789_DAC_VOL_RIGHT,
214	.reg_defaults = pcm1789_reg_defaults,
215	.num_reg_defaults = ARRAY_SIZE(pcm1789_reg_defaults),
216	.writeable_reg = pcm1789_writeable_reg,
217	.readable_reg = pcm1789_accessible_reg,
218	};
219	EXPORT_SYMBOL_GPL(pcm1789_regmap_config);
220
221	static const struct snd_soc_component_driver soc_component_dev_pcm1789 = {
222	.controls = pcm1789_controls,
223	.num_controls = ARRAY_SIZE(pcm1789_controls),
224	.dapm_widgets = pcm1789_dapm_widgets,
225	.num_dapm_widgets = ARRAY_SIZE(pcm1789_dapm_widgets),
226	.dapm_routes = pcm1789_dapm_routes,
227	.num_dapm_routes = ARRAY_SIZE(pcm1789_dapm_routes),
228	.idle_bias_on = 1,
229	.use_pmdown_time = 1,
230	.endianness = 1,
231	.non_legacy_dai_naming = 1,
232	};
233
234	int pcm1789_common_init(struct device dev, struct regmap regmap)
235	{
236	struct pcm1789_private *pcm1789;
237
238	pcm1789 = devm_kzalloc(dev, sizeof(struct pcm1789_private),
239	GFP_KERNEL);
240	if (!pcm1789)
241	return -ENOMEM;
242
243	pcm1789->regmap = regmap;
244	pcm1789->dev = dev;
245	dev_set_drvdata(dev, pcm1789);
246
247	pcm1789->reset = devm_gpiod_get_optional(dev, "reset", GPIOD_OUT_HIGH);
248	if (IS_ERR(pcm1789->reset))
249	return PTR_ERR(pcm1789->reset);
250
251	gpiod_set_value_cansleep(pcm1789->reset, 0);
252	msleep(300);
253
254	INIT_WORK(&pcm1789->work, pcm1789_work_queue);
255
256	return devm_snd_soc_register_component(dev, &soc_component_dev_pcm1789,
257	&pcm1789_dai, 1);
258	}
259	EXPORT_SYMBOL_GPL(pcm1789_common_init);
260
261	int pcm1789_common_exit(struct device *dev)
262	{
263	struct pcm1789_private *priv = dev_get_drvdata(dev);
264
a7dc662c	265	flush_work(&priv->work);
4ae340d1 MJ	266
	267	return 0;
	268	}
	269	EXPORT_SYMBOL_GPL(pcm1789_common_exit);
	270
	271	MODULE_DESCRIPTION("ASoC PCM1789 driver");
	272	MODULE_AUTHOR("Mylène Josserand <mylene.josserand@free-electrons.com>");
	273	MODULE_LICENSE("GPL");