[linux-2.6-block.git] / sound / soc / codecs / max9759.c

// SPDX-Licence-Identifier: GPL-2.0
/*
 * MAX9759 Amplifier Driver
 *
 * Copyright (c) 2017 BayLibre, SAS.
 * Author: Neil Armstrong <narmstrong@baylibre.com>
 */

#include <linux/gpio/consumer.h>
#include <linux/module.h>
#include <sound/soc.h>
#include <sound/soc-dapm.h>
#include <sound/tlv.h>

#define DRV_NAME "max9759"

struct max9759 {
	struct gpio_desc *gpiod_shutdown;
	struct gpio_desc *gpiod_mute;
	struct gpio_descs *gpiod_gain;
	bool is_mute;
	unsigned int gain;
};

static int pga_event(struct snd_soc_dapm_widget *w,
		     struct snd_kcontrol *control, int event)
{
	struct snd_soc_component *c = snd_soc_dapm_to_component(w->dapm);
	struct max9759 *priv = snd_soc_component_get_drvdata(c);

	if (SND_SOC_DAPM_EVENT_ON(event))
		gpiod_set_value_cansleep(priv->gpiod_shutdown, 0);
	else
		gpiod_set_value_cansleep(priv->gpiod_shutdown, 1);

	return 0;
}

/* From 6dB to 24dB in steps of 6dB */
static const DECLARE_TLV_DB_SCALE(speaker_gain_tlv, 600, 600, 0);

static int speaker_gain_control_get(struct snd_kcontrol *kcontrol,
				    struct snd_ctl_elem_value *ucontrol)
{
	struct snd_soc_component *c = snd_soc_kcontrol_component(kcontrol);
	struct max9759 *priv = snd_soc_component_get_drvdata(c);

	ucontrol->value.integer.value[0] = priv->gain;

	return 0;
}

static const bool speaker_gain_table[4][2] = {
	/* G1, G2 */
	{true, true},	/* +6dB */
	{false, true},	/* +12dB */
	{true, false},	/* +18dB */
	{false, false},	/* +24dB */
};

static int speaker_gain_control_put(struct snd_kcontrol *kcontrol,
				    struct snd_ctl_elem_value *ucontrol)
{
	struct snd_soc_component *c = snd_soc_kcontrol_component(kcontrol);
	struct max9759 *priv = snd_soc_component_get_drvdata(c);

	if (ucontrol->value.integer.value[0] > 3)
		return -EINVAL;

	priv->gain = ucontrol->value.integer.value[0];

	/* G1 */
	gpiod_set_value_cansleep(priv->gpiod_gain->desc[0],
				 speaker_gain_table[priv->gain][0]);
	/* G2 */
	gpiod_set_value_cansleep(priv->gpiod_gain->desc[1],
				 speaker_gain_table[priv->gain][1]);

	return 1;
}

static int speaker_mute_get(struct snd_kcontrol *kcontrol,
			    struct snd_ctl_elem_value *ucontrol)
{
	struct snd_soc_component *c = snd_soc_kcontrol_component(kcontrol);
	struct max9759 *priv = snd_soc_component_get_drvdata(c);

	ucontrol->value.integer.value[0] = !priv->is_mute;

	return 0;
}

static int speaker_mute_put(struct snd_kcontrol *kcontrol,
			    struct snd_ctl_elem_value *ucontrol)
{
	struct snd_soc_component *c = snd_soc_kcontrol_component(kcontrol);
	struct max9759 *priv = snd_soc_component_get_drvdata(c);

	priv->is_mute = !ucontrol->value.integer.value[0];

	gpiod_set_value_cansleep(priv->gpiod_mute, priv->is_mute);

	return 1;
}

static const struct snd_kcontrol_new max9759_dapm_controls[] = {
	SOC_SINGLE_EXT_TLV("Speaker Gain Volume", 0, 0, 3, 0,
			   speaker_gain_control_get, speaker_gain_control_put,
			   speaker_gain_tlv),
	SOC_SINGLE_BOOL_EXT("Playback Switch", 0,
			    speaker_mute_get, speaker_mute_put),
};

static const struct snd_soc_dapm_widget max9759_dapm_widgets[] = {
	SND_SOC_DAPM_INPUT("INL"),
	SND_SOC_DAPM_INPUT("INR"),
	SND_SOC_DAPM_PGA_E("PGA", SND_SOC_NOPM, 0, 0, NULL, 0, pga_event,
			   (SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMD)),
	SND_SOC_DAPM_OUTPUT("OUTL"),
	SND_SOC_DAPM_OUTPUT("OUTR"),
};

static const struct snd_soc_dapm_route max9759_dapm_routes[] = {
	{ "PGA", NULL, "INL" },
	{ "PGA", NULL, "INR" },
	{ "OUTL", NULL, "PGA" },
	{ "OUTR", NULL, "PGA" },
};

static const struct snd_soc_component_driver max9759_component_driver = {
	.controls		= max9759_dapm_controls,
	.num_controls		= ARRAY_SIZE(max9759_dapm_controls),
	.dapm_widgets		= max9759_dapm_widgets,
	.num_dapm_widgets	= ARRAY_SIZE(max9759_dapm_widgets),
	.dapm_routes		= max9759_dapm_routes,
	.num_dapm_routes	= ARRAY_SIZE(max9759_dapm_routes),
};

static int max9759_probe(struct platform_device *pdev)
{
	struct device *dev = &pdev->dev;
	struct max9759 *priv;
	int err;

	priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
	if (!priv)
		return -ENOMEM;

	platform_set_drvdata(pdev, priv);

	priv->gpiod_shutdown = devm_gpiod_get(dev, "shutdown", GPIOD_OUT_HIGH);
	if (IS_ERR(priv->gpiod_shutdown)) {
		err = PTR_ERR(priv->gpiod_shutdown);
		if (err != -EPROBE_DEFER)
			dev_err(dev, "Failed to get 'shutdown' gpio: %d", err);
		return err;
	}

	priv->gpiod_mute = devm_gpiod_get(dev, "mute", GPIOD_OUT_HIGH);
	if (IS_ERR(priv->gpiod_mute)) {
		err = PTR_ERR(priv->gpiod_mute);
		if (err != -EPROBE_DEFER)
			dev_err(dev, "Failed to get 'mute' gpio: %d", err);
		return err;
	}
	priv->is_mute = true;

	priv->gpiod_gain = devm_gpiod_get_array(dev, "gain", GPIOD_OUT_HIGH);
	if (IS_ERR(priv->gpiod_gain)) {
		err = PTR_ERR(priv->gpiod_gain);
		if (err != -EPROBE_DEFER)
			dev_err(dev, "Failed to get 'gain' gpios: %d", err);
		return err;
	}
	priv->gain = 0;

	if (priv->gpiod_gain->ndescs != 2) {
		dev_err(dev, "Invalid 'gain' gpios count: %d",
			priv->gpiod_gain->ndescs);
		return -EINVAL;
	}

	return devm_snd_soc_register_component(dev, &max9759_component_driver,
					       NULL, 0);
}

#ifdef CONFIG_OF
static const struct of_device_id max9759_ids[] = {
	{ .compatible = "maxim,max9759", },
	{ }
};
MODULE_DEVICE_TABLE(of, max9759_ids);
#endif

static struct platform_driver max9759_driver = {
	.driver = {
		.name = DRV_NAME,
		.of_match_table = of_match_ptr(max9759_ids),
	},
	.probe = max9759_probe,
};

module_platform_driver(max9759_driver);

MODULE_DESCRIPTION("ASoC MAX9759 amplifier driver");
MODULE_AUTHOR("Neil Armstrong <narmstrong@baylibre.com>");
MODULE_LICENSE("GPL");
Commit	Line	Data
fa8d9151 NA	1	// SPDX-Licence-Identifier: GPL-2.0
	2	/*
	3	* MAX9759 Amplifier Driver
	4	*
	5	* Copyright (c) 2017 BayLibre, SAS.
	6	* Author: Neil Armstrong <narmstrong@baylibre.com>
	7	*/
	8
	9	#include <linux/gpio/consumer.h>
	10	#include <linux/module.h>
	11	#include <sound/soc.h>
	12	#include <sound/soc-dapm.h>
	13	#include <sound/tlv.h>
	14
	15	#define DRV_NAME "max9759"
	16
	17	struct max9759 {
	18	struct gpio_desc *gpiod_shutdown;
	19	struct gpio_desc *gpiod_mute;
	20	struct gpio_descs *gpiod_gain;
	21	bool is_mute;
	22	unsigned int gain;
	23	};
	24
	25	static int pga_event(struct snd_soc_dapm_widget *w,
	26	struct snd_kcontrol *control, int event)
	27	{
	28	struct snd_soc_component *c = snd_soc_dapm_to_component(w->dapm);
	29	struct max9759 *priv = snd_soc_component_get_drvdata(c);
	30
	31	if (SND_SOC_DAPM_EVENT_ON(event))
	32	gpiod_set_value_cansleep(priv->gpiod_shutdown, 0);
	33	else
	34	gpiod_set_value_cansleep(priv->gpiod_shutdown, 1);
	35
	36	return 0;
	37	}
	38
	39	/* From 6dB to 24dB in steps of 6dB */
	40	static const DECLARE_TLV_DB_SCALE(speaker_gain_tlv, 600, 600, 0);
	41
	42	static int speaker_gain_control_get(struct snd_kcontrol *kcontrol,
	43	struct snd_ctl_elem_value *ucontrol)
	44	{
	45	struct snd_soc_component *c = snd_soc_kcontrol_component(kcontrol);
	46	struct max9759 *priv = snd_soc_component_get_drvdata(c);
	47
	48	ucontrol->value.integer.value[0] = priv->gain;
	49
	50	return 0;
	51	}
	52
	53	static const bool speaker_gain_table[4][2] = {
	54	/* G1, G2 */
	55	{true, true}, /* +6dB */
	56	{false, true}, /* +12dB */
	57	{true, false}, /* +18dB */
	58	{false, false}, /* +24dB */
	59	};
	60
	61	static int speaker_gain_control_put(struct snd_kcontrol *kcontrol,
	62	struct snd_ctl_elem_value *ucontrol)
	63	{
	64	struct snd_soc_component *c = snd_soc_kcontrol_component(kcontrol);
65	struct max9759 *priv = snd_soc_component_get_drvdata(c);
66
67	if (ucontrol->value.integer.value[0] > 3)
68	return -EINVAL;
69
70	priv->gain = ucontrol->value.integer.value[0];
71
72	/* G1 */
73	gpiod_set_value_cansleep(priv->gpiod_gain->desc[0],
74	speaker_gain_table[priv->gain][0]);
75	/* G2 */
76	gpiod_set_value_cansleep(priv->gpiod_gain->desc[1],
77	speaker_gain_table[priv->gain][1]);
78
79	return 1;
80	}
81
82	static int speaker_mute_get(struct snd_kcontrol *kcontrol,
83	struct snd_ctl_elem_value *ucontrol)
84	{
85	struct snd_soc_component *c = snd_soc_kcontrol_component(kcontrol);
86	struct max9759 *priv = snd_soc_component_get_drvdata(c);
87
88	ucontrol->value.integer.value[0] = !priv->is_mute;
89
90	return 0;
91	}
92
93	static int speaker_mute_put(struct snd_kcontrol *kcontrol,
94	struct snd_ctl_elem_value *ucontrol)
95	{
96	struct snd_soc_component *c = snd_soc_kcontrol_component(kcontrol);
97	struct max9759 *priv = snd_soc_component_get_drvdata(c);
98
99	priv->is_mute = !ucontrol->value.integer.value[0];
100
101	gpiod_set_value_cansleep(priv->gpiod_mute, priv->is_mute);
102
103	return 1;
104	}
105
106	static const struct snd_kcontrol_new max9759_dapm_controls[] = {
107	SOC_SINGLE_EXT_TLV("Speaker Gain Volume", 0, 0, 3, 0,
108	speaker_gain_control_get, speaker_gain_control_put,
109	speaker_gain_tlv),
110	SOC_SINGLE_BOOL_EXT("Playback Switch", 0,
111	speaker_mute_get, speaker_mute_put),
112	};
113
114	static const struct snd_soc_dapm_widget max9759_dapm_widgets[] = {
115	SND_SOC_DAPM_INPUT("INL"),
116	SND_SOC_DAPM_INPUT("INR"),
117	SND_SOC_DAPM_PGA_E("PGA", SND_SOC_NOPM, 0, 0, NULL, 0, pga_event,
118	(SND_SOC_DAPM_PRE_PMU \| SND_SOC_DAPM_POST_PMD)),
119	SND_SOC_DAPM_OUTPUT("OUTL"),
120	SND_SOC_DAPM_OUTPUT("OUTR"),
121	};
122
123	static const struct snd_soc_dapm_route max9759_dapm_routes[] = {
124	{ "PGA", NULL, "INL" },
125	{ "PGA", NULL, "INR" },
126	{ "OUTL", NULL, "PGA" },
127	{ "OUTR", NULL, "PGA" },
128	};
129
130	static const struct snd_soc_component_driver max9759_component_driver = {
131	.controls = max9759_dapm_controls,
132	.num_controls = ARRAY_SIZE(max9759_dapm_controls),
133	.dapm_widgets = max9759_dapm_widgets,
134	.num_dapm_widgets = ARRAY_SIZE(max9759_dapm_widgets),
135	.dapm_routes = max9759_dapm_routes,
136	.num_dapm_routes = ARRAY_SIZE(max9759_dapm_routes),
137	};
138
139	static int max9759_probe(struct platform_device *pdev)
140	{
141	struct device *dev = &pdev->dev;
142	struct max9759 *priv;
143	int err;
144
145	priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
146	if (!priv)
147	return -ENOMEM;
148
149	platform_set_drvdata(pdev, priv);
150
151	priv->gpiod_shutdown = devm_gpiod_get(dev, "shutdown", GPIOD_OUT_HIGH);
152	if (IS_ERR(priv->gpiod_shutdown)) {
153	err = PTR_ERR(priv->gpiod_shutdown);
154	if (err != -EPROBE_DEFER)
155	dev_err(dev, "Failed to get 'shutdown' gpio: %d", err);
156	return err;
157	}
158
159	priv->gpiod_mute = devm_gpiod_get(dev, "mute", GPIOD_OUT_HIGH);
160	if (IS_ERR(priv->gpiod_mute)) {
161	err = PTR_ERR(priv->gpiod_mute);
162	if (err != -EPROBE_DEFER)
163	dev_err(dev, "Failed to get 'mute' gpio: %d", err);
164	return err;
165	}
166	priv->is_mute = true;
167
168	priv->gpiod_gain = devm_gpiod_get_array(dev, "gain", GPIOD_OUT_HIGH);
169	if (IS_ERR(priv->gpiod_gain)) {
170	err = PTR_ERR(priv->gpiod_gain);
171	if (err != -EPROBE_DEFER)
172	dev_err(dev, "Failed to get 'gain' gpios: %d", err);
173	return err;
174	}
175	priv->gain = 0;
176
177	if (priv->gpiod_gain->ndescs != 2) {
178	dev_err(dev, "Invalid 'gain' gpios count: %d",
179	priv->gpiod_gain->ndescs);
180	return -EINVAL;
181	}
182
183	return devm_snd_soc_register_component(dev, &max9759_component_driver,
184	NULL, 0);
185	}
186
187	#ifdef CONFIG_OF
188	static const struct of_device_id max9759_ids[] = {
189	{ .compatible = "maxim,max9759", },
190	{ }
191	};
192	MODULE_DEVICE_TABLE(of, max9759_ids);
193	#endif
194
195	static struct platform_driver max9759_driver = {
196	.driver = {
197	.name = DRV_NAME,
198	.of_match_table = of_match_ptr(max9759_ids),
199	},
200	.probe = max9759_probe,
201	};
202
203	module_platform_driver(max9759_driver);
204
205	MODULE_DESCRIPTION("ASoC MAX9759 amplifier driver");
206	MODULE_AUTHOR("Neil Armstrong <narmstrong@baylibre.com>");
207	MODULE_LICENSE("GPL");