1// SPDX-License-Identifier: GPL-2.0-only
  2/*
  3 * MAX9768 AMP driver
  4 *
  5 * Copyright (C) 2011, 2012 by Wolfram Sang, Pengutronix e.K.
  6 */
  7
  8#include <linux/init.h>
  9#include <linux/module.h>
 10#include <linux/i2c.h>
 11#include <linux/slab.h>
 12#include <linux/gpio/consumer.h>
 13#include <linux/regmap.h>
 14
 15#include <sound/core.h>
 16#include <sound/soc.h>
 17#include <sound/tlv.h>
 18#include <sound/max9768.h>
 19
 20/* "Registers" */
 21#define MAX9768_VOL 0
 22#define MAX9768_CTRL 3
 23
 24/* Commands */
 25#define MAX9768_CTRL_PWM 0x15
 26#define MAX9768_CTRL_FILTERLESS 0x16
 27
 28struct max9768 {
 29	struct regmap *regmap;
 30	struct gpio_desc *mute;
 31	struct gpio_desc *shdn;
 32	u32 flags;
 33};
 34
 35static const struct reg_default max9768_default_regs[] = {
 36	{ 0, 0 },
 37	{ 3,  MAX9768_CTRL_FILTERLESS},
 38};
 39
 40static int max9768_get_gpio(struct snd_kcontrol *kcontrol,
 41	struct snd_ctl_elem_value *ucontrol)
 42{
 43	struct snd_soc_component *c = snd_soc_kcontrol_component(kcontrol);
 44	struct max9768 *max9768 = snd_soc_component_get_drvdata(c);
 45	int val = gpiod_get_value_cansleep(max9768->mute);
 46
 47	ucontrol->value.integer.value[0] = !val;
 48
 49	return 0;
 50}
 51
 52static int max9768_set_gpio(struct snd_kcontrol *kcontrol,
 53	struct snd_ctl_elem_value *ucontrol)
 54{
 55	struct snd_soc_component *c = snd_soc_kcontrol_component(kcontrol);
 56	struct max9768 *max9768 = snd_soc_component_get_drvdata(c);
 57	bool val = !ucontrol->value.integer.value[0];
 58	int ret;
 59
 60	if (val != gpiod_get_value_cansleep(max9768->mute))
 61		ret = 1;
 62	else
 63		ret = 0;
 64
 65	gpiod_set_value_cansleep(max9768->mute, val);
 66
 67	return ret;
 68}
 69
 70static const DECLARE_TLV_DB_RANGE(volume_tlv,
 71	0, 0, TLV_DB_SCALE_ITEM(-16150, 0, 0),
 72	1, 1, TLV_DB_SCALE_ITEM(-9280, 0, 0),
 73	2, 2, TLV_DB_SCALE_ITEM(-9030, 0, 0),
 74	3, 3, TLV_DB_SCALE_ITEM(-8680, 0, 0),
 75	4, 4, TLV_DB_SCALE_ITEM(-8430, 0, 0),
 76	5, 5, TLV_DB_SCALE_ITEM(-8080, 0, 0),
 77	6, 6, TLV_DB_SCALE_ITEM(-7830, 0, 0),
 78	7, 7, TLV_DB_SCALE_ITEM(-7470, 0, 0),
 79	8, 8, TLV_DB_SCALE_ITEM(-7220, 0, 0),
 80	9, 9, TLV_DB_SCALE_ITEM(-6870, 0, 0),
 81	10, 10, TLV_DB_SCALE_ITEM(-6620, 0, 0),
 82	11, 11, TLV_DB_SCALE_ITEM(-6270, 0, 0),
 83	12, 12, TLV_DB_SCALE_ITEM(-6020, 0, 0),
 84	13, 13, TLV_DB_SCALE_ITEM(-5670, 0, 0),
 85	14, 14, TLV_DB_SCALE_ITEM(-5420, 0, 0),
 86	15, 17, TLV_DB_SCALE_ITEM(-5060, 250, 0),
 87	18, 18, TLV_DB_SCALE_ITEM(-4370, 0, 0),
 88	19, 19, TLV_DB_SCALE_ITEM(-4210, 0, 0),
 89	20, 20, TLV_DB_SCALE_ITEM(-3960, 0, 0),
 90	21, 21, TLV_DB_SCALE_ITEM(-3760, 0, 0),
 91	22, 22, TLV_DB_SCALE_ITEM(-3600, 0, 0),
 92	23, 23, TLV_DB_SCALE_ITEM(-3340, 0, 0),
 93	24, 24, TLV_DB_SCALE_ITEM(-3150, 0, 0),
 94	25, 25, TLV_DB_SCALE_ITEM(-2980, 0, 0),
 95	26, 26, TLV_DB_SCALE_ITEM(-2720, 0, 0),
 96	27, 27, TLV_DB_SCALE_ITEM(-2520, 0, 0),
 97	28, 30, TLV_DB_SCALE_ITEM(-2350, 190, 0),
 98	31, 31, TLV_DB_SCALE_ITEM(-1750, 0, 0),
 99	32, 34, TLV_DB_SCALE_ITEM(-1640, 100, 0),
100	35, 37, TLV_DB_SCALE_ITEM(-1310, 110, 0),
101	38, 39, TLV_DB_SCALE_ITEM(-990, 100, 0),
102	40, 40, TLV_DB_SCALE_ITEM(-710, 0, 0),
103	41, 41, TLV_DB_SCALE_ITEM(-600, 0, 0),
104	42, 42, TLV_DB_SCALE_ITEM(-500, 0, 0),
105	43, 43, TLV_DB_SCALE_ITEM(-340, 0, 0),
106	44, 44, TLV_DB_SCALE_ITEM(-190, 0, 0),
107	45, 45, TLV_DB_SCALE_ITEM(-50, 0, 0),
108	46, 46, TLV_DB_SCALE_ITEM(50, 0, 0),
109	47, 50, TLV_DB_SCALE_ITEM(120, 40, 0),
110	51, 57, TLV_DB_SCALE_ITEM(290, 50, 0),
111	58, 58, TLV_DB_SCALE_ITEM(650, 0, 0),
112	59, 62, TLV_DB_SCALE_ITEM(700, 60, 0),
113	63, 63, TLV_DB_SCALE_ITEM(950, 0, 0)
114);
115
116static const struct snd_kcontrol_new max9768_volume[] = {
117	SOC_SINGLE_TLV("Playback Volume", MAX9768_VOL, 0, 63, 0, volume_tlv),
118};
119
120static const struct snd_kcontrol_new max9768_mute[] = {
121	SOC_SINGLE_BOOL_EXT("Playback Switch", 0, max9768_get_gpio, max9768_set_gpio),
122};
123
124static const struct snd_soc_dapm_widget max9768_dapm_widgets[] = {
125SND_SOC_DAPM_INPUT("IN"),
126
127SND_SOC_DAPM_OUTPUT("OUT+"),
128SND_SOC_DAPM_OUTPUT("OUT-"),
129};
130
131static const struct snd_soc_dapm_route max9768_dapm_routes[] = {
132	{ "OUT+", NULL, "IN" },
133	{ "OUT-", NULL, "IN" },
134};
135
136static int max9768_probe(struct snd_soc_component *component)
137{
138	struct max9768 *max9768 = snd_soc_component_get_drvdata(component);
139	int ret;
140
141	if (max9768->flags & MAX9768_FLAG_CLASSIC_PWM) {
142		ret = regmap_write(max9768->regmap, MAX9768_CTRL,
143			MAX9768_CTRL_PWM);
144		if (ret)
145			return ret;
146	}
147
148	if (max9768->mute) {
149		ret = snd_soc_add_component_controls(component, max9768_mute,
150				ARRAY_SIZE(max9768_mute));
151		if (ret)
152			return ret;
153	}
154
155	return 0;
156}
157
158static const struct snd_soc_component_driver max9768_component_driver = {
159	.probe = max9768_probe,
160	.controls = max9768_volume,
161	.num_controls = ARRAY_SIZE(max9768_volume),
162	.dapm_widgets = max9768_dapm_widgets,
163	.num_dapm_widgets = ARRAY_SIZE(max9768_dapm_widgets),
164	.dapm_routes = max9768_dapm_routes,
165	.num_dapm_routes = ARRAY_SIZE(max9768_dapm_routes),
166};
167
168static const struct regmap_config max9768_i2c_regmap_config = {
169	.reg_bits = 2,
170	.val_bits = 6,
171	.max_register = 3,
172	.reg_defaults = max9768_default_regs,
173	.num_reg_defaults = ARRAY_SIZE(max9768_default_regs),
174	.cache_type = REGCACHE_RBTREE,
175};
176
177static int max9768_i2c_probe(struct i2c_client *client)
178{
179	struct max9768 *max9768;
180	struct max9768_pdata *pdata = client->dev.platform_data;
181
182	max9768 = devm_kzalloc(&client->dev, sizeof(*max9768), GFP_KERNEL);
183	if (!max9768)
184		return -ENOMEM;
185
186	/* Mute on powerup to avoid clicks */
187	max9768->mute = devm_gpiod_get_optional(&client->dev,
188						"mute",
189						GPIOD_OUT_HIGH);
190	if (IS_ERR(max9768->mute))
191		return PTR_ERR(max9768->mute);
192	gpiod_set_consumer_name(max9768->mute, "MAX9768 Mute");
193
194	/* Activate chip by releasing shutdown, enables I2C */
195	max9768->shdn = devm_gpiod_get_optional(&client->dev,
196						"shutdown",
197						GPIOD_OUT_HIGH);
198	if (IS_ERR(max9768->shdn))
199		return PTR_ERR(max9768->shdn);
200	gpiod_set_consumer_name(max9768->shdn, "MAX9768 Shutdown");
201
202	if (pdata)
203		max9768->flags = pdata->flags;
204
205	i2c_set_clientdata(client, max9768);
206
207	max9768->regmap = devm_regmap_init_i2c(client, &max9768_i2c_regmap_config);
208	if (IS_ERR(max9768->regmap))
209		return PTR_ERR(max9768->regmap);
210
211	return devm_snd_soc_register_component(&client->dev,
212		&max9768_component_driver, NULL, 0);
213}
214
215static const struct i2c_device_id max9768_i2c_id[] = {
216	{ "max9768" },
217	{ }
218};
219MODULE_DEVICE_TABLE(i2c, max9768_i2c_id);
220
221static struct i2c_driver max9768_i2c_driver = {
222	.driver = {
223		.name = "max9768",
224	},
225	.probe = max9768_i2c_probe,
226	.id_table = max9768_i2c_id,
227};
228module_i2c_driver(max9768_i2c_driver);
229
230MODULE_AUTHOR("Wolfram Sang <kernel@pengutronix.de>");
231MODULE_DESCRIPTION("ASoC MAX9768 amplifier driver");
232MODULE_LICENSE("GPL v2");

  1// SPDX-License-Identifier: GPL-2.0-only
  2/*
  3 * MAX9768 AMP driver
  4 *
  5 * Copyright (C) 2011, 2012 by Wolfram Sang, Pengutronix e.K.
  6 */
  7
  8#include <linux/init.h>
  9#include <linux/module.h>
 10#include <linux/i2c.h>
 11#include <linux/slab.h>
 12#include <linux/gpio/consumer.h>
 13#include <linux/regmap.h>
 14
 15#include <sound/core.h>
 16#include <sound/soc.h>
 17#include <sound/tlv.h>
 18#include <sound/max9768.h>
 19
 20/* "Registers" */
 21#define MAX9768_VOL 0
 22#define MAX9768_CTRL 3
 23
 24/* Commands */
 25#define MAX9768_CTRL_PWM 0x15
 26#define MAX9768_CTRL_FILTERLESS 0x16
 27
 28struct max9768 {
 29	struct regmap *regmap;
 30	struct gpio_desc *mute;
 31	struct gpio_desc *shdn;
 32	u32 flags;
 33};
 34
 35static const struct reg_default max9768_default_regs[] = {
 36	{ 0, 0 },
 37	{ 3,  MAX9768_CTRL_FILTERLESS},
 38};
 39
 40static int max9768_get_gpio(struct snd_kcontrol *kcontrol,
 41	struct snd_ctl_elem_value *ucontrol)
 42{
 43	struct snd_soc_component *c = snd_soc_kcontrol_component(kcontrol);
 44	struct max9768 *max9768 = snd_soc_component_get_drvdata(c);
 45	int val = gpiod_get_value_cansleep(max9768->mute);
 46
 47	ucontrol->value.integer.value[0] = !val;
 48
 49	return 0;
 50}
 51
 52static int max9768_set_gpio(struct snd_kcontrol *kcontrol,
 53	struct snd_ctl_elem_value *ucontrol)
 54{
 55	struct snd_soc_component *c = snd_soc_kcontrol_component(kcontrol);
 56	struct max9768 *max9768 = snd_soc_component_get_drvdata(c);
 
 
 
 
 
 
 
 57
 58	gpiod_set_value_cansleep(max9768->mute, !ucontrol->value.integer.value[0]);
 59
 60	return 0;
 61}
 62
 63static const DECLARE_TLV_DB_RANGE(volume_tlv,
 64	0, 0, TLV_DB_SCALE_ITEM(-16150, 0, 0),
 65	1, 1, TLV_DB_SCALE_ITEM(-9280, 0, 0),
 66	2, 2, TLV_DB_SCALE_ITEM(-9030, 0, 0),
 67	3, 3, TLV_DB_SCALE_ITEM(-8680, 0, 0),
 68	4, 4, TLV_DB_SCALE_ITEM(-8430, 0, 0),
 69	5, 5, TLV_DB_SCALE_ITEM(-8080, 0, 0),
 70	6, 6, TLV_DB_SCALE_ITEM(-7830, 0, 0),
 71	7, 7, TLV_DB_SCALE_ITEM(-7470, 0, 0),
 72	8, 8, TLV_DB_SCALE_ITEM(-7220, 0, 0),
 73	9, 9, TLV_DB_SCALE_ITEM(-6870, 0, 0),
 74	10, 10, TLV_DB_SCALE_ITEM(-6620, 0, 0),
 75	11, 11, TLV_DB_SCALE_ITEM(-6270, 0, 0),
 76	12, 12, TLV_DB_SCALE_ITEM(-6020, 0, 0),
 77	13, 13, TLV_DB_SCALE_ITEM(-5670, 0, 0),
 78	14, 14, TLV_DB_SCALE_ITEM(-5420, 0, 0),
 79	15, 17, TLV_DB_SCALE_ITEM(-5060, 250, 0),
 80	18, 18, TLV_DB_SCALE_ITEM(-4370, 0, 0),
 81	19, 19, TLV_DB_SCALE_ITEM(-4210, 0, 0),
 82	20, 20, TLV_DB_SCALE_ITEM(-3960, 0, 0),
 83	21, 21, TLV_DB_SCALE_ITEM(-3760, 0, 0),
 84	22, 22, TLV_DB_SCALE_ITEM(-3600, 0, 0),
 85	23, 23, TLV_DB_SCALE_ITEM(-3340, 0, 0),
 86	24, 24, TLV_DB_SCALE_ITEM(-3150, 0, 0),
 87	25, 25, TLV_DB_SCALE_ITEM(-2980, 0, 0),
 88	26, 26, TLV_DB_SCALE_ITEM(-2720, 0, 0),
 89	27, 27, TLV_DB_SCALE_ITEM(-2520, 0, 0),
 90	28, 30, TLV_DB_SCALE_ITEM(-2350, 190, 0),
 91	31, 31, TLV_DB_SCALE_ITEM(-1750, 0, 0),
 92	32, 34, TLV_DB_SCALE_ITEM(-1640, 100, 0),
 93	35, 37, TLV_DB_SCALE_ITEM(-1310, 110, 0),
 94	38, 39, TLV_DB_SCALE_ITEM(-990, 100, 0),
 95	40, 40, TLV_DB_SCALE_ITEM(-710, 0, 0),
 96	41, 41, TLV_DB_SCALE_ITEM(-600, 0, 0),
 97	42, 42, TLV_DB_SCALE_ITEM(-500, 0, 0),
 98	43, 43, TLV_DB_SCALE_ITEM(-340, 0, 0),
 99	44, 44, TLV_DB_SCALE_ITEM(-190, 0, 0),
100	45, 45, TLV_DB_SCALE_ITEM(-50, 0, 0),
101	46, 46, TLV_DB_SCALE_ITEM(50, 0, 0),
102	47, 50, TLV_DB_SCALE_ITEM(120, 40, 0),
103	51, 57, TLV_DB_SCALE_ITEM(290, 50, 0),
104	58, 58, TLV_DB_SCALE_ITEM(650, 0, 0),
105	59, 62, TLV_DB_SCALE_ITEM(700, 60, 0),
106	63, 63, TLV_DB_SCALE_ITEM(950, 0, 0)
107);
108
109static const struct snd_kcontrol_new max9768_volume[] = {
110	SOC_SINGLE_TLV("Playback Volume", MAX9768_VOL, 0, 63, 0, volume_tlv),
111};
112
113static const struct snd_kcontrol_new max9768_mute[] = {
114	SOC_SINGLE_BOOL_EXT("Playback Switch", 0, max9768_get_gpio, max9768_set_gpio),
115};
116
117static const struct snd_soc_dapm_widget max9768_dapm_widgets[] = {
118SND_SOC_DAPM_INPUT("IN"),
119
120SND_SOC_DAPM_OUTPUT("OUT+"),
121SND_SOC_DAPM_OUTPUT("OUT-"),
122};
123
124static const struct snd_soc_dapm_route max9768_dapm_routes[] = {
125	{ "OUT+", NULL, "IN" },
126	{ "OUT-", NULL, "IN" },
127};
128
129static int max9768_probe(struct snd_soc_component *component)
130{
131	struct max9768 *max9768 = snd_soc_component_get_drvdata(component);
132	int ret;
133
134	if (max9768->flags & MAX9768_FLAG_CLASSIC_PWM) {
135		ret = regmap_write(max9768->regmap, MAX9768_CTRL,
136			MAX9768_CTRL_PWM);
137		if (ret)
138			return ret;
139	}
140
141	if (max9768->mute) {
142		ret = snd_soc_add_component_controls(component, max9768_mute,
143				ARRAY_SIZE(max9768_mute));
144		if (ret)
145			return ret;
146	}
147
148	return 0;
149}
150
151static const struct snd_soc_component_driver max9768_component_driver = {
152	.probe = max9768_probe,
153	.controls = max9768_volume,
154	.num_controls = ARRAY_SIZE(max9768_volume),
155	.dapm_widgets = max9768_dapm_widgets,
156	.num_dapm_widgets = ARRAY_SIZE(max9768_dapm_widgets),
157	.dapm_routes = max9768_dapm_routes,
158	.num_dapm_routes = ARRAY_SIZE(max9768_dapm_routes),
159};
160
161static const struct regmap_config max9768_i2c_regmap_config = {
162	.reg_bits = 2,
163	.val_bits = 6,
164	.max_register = 3,
165	.reg_defaults = max9768_default_regs,
166	.num_reg_defaults = ARRAY_SIZE(max9768_default_regs),
167	.cache_type = REGCACHE_RBTREE,
168};
169
170static int max9768_i2c_probe(struct i2c_client *client)
171{
172	struct max9768 *max9768;
173	struct max9768_pdata *pdata = client->dev.platform_data;
174
175	max9768 = devm_kzalloc(&client->dev, sizeof(*max9768), GFP_KERNEL);
176	if (!max9768)
177		return -ENOMEM;
178
179	/* Mute on powerup to avoid clicks */
180	max9768->mute = devm_gpiod_get_optional(&client->dev,
181						"mute",
182						GPIOD_OUT_HIGH);
183	if (IS_ERR(max9768->mute))
184		return PTR_ERR(max9768->mute);
185	gpiod_set_consumer_name(max9768->mute, "MAX9768 Mute");
186
187	/* Activate chip by releasing shutdown, enables I2C */
188	max9768->shdn = devm_gpiod_get_optional(&client->dev,
189						"shutdown",
190						GPIOD_OUT_HIGH);
191	if (IS_ERR(max9768->shdn))
192		return PTR_ERR(max9768->shdn);
193	gpiod_set_consumer_name(max9768->shdn, "MAX9768 Shutdown");
194
195	if (pdata)
196		max9768->flags = pdata->flags;
197
198	i2c_set_clientdata(client, max9768);
199
200	max9768->regmap = devm_regmap_init_i2c(client, &max9768_i2c_regmap_config);
201	if (IS_ERR(max9768->regmap))
202		return PTR_ERR(max9768->regmap);
203
204	return devm_snd_soc_register_component(&client->dev,
205		&max9768_component_driver, NULL, 0);
206}
207
208static const struct i2c_device_id max9768_i2c_id[] = {
209	{ "max9768", 0 },
210	{ }
211};
212MODULE_DEVICE_TABLE(i2c, max9768_i2c_id);
213
214static struct i2c_driver max9768_i2c_driver = {
215	.driver = {
216		.name = "max9768",
217	},
218	.probe = max9768_i2c_probe,
219	.id_table = max9768_i2c_id,
220};
221module_i2c_driver(max9768_i2c_driver);
222
223MODULE_AUTHOR("Wolfram Sang <kernel@pengutronix.de>");
224MODULE_DESCRIPTION("ASoC MAX9768 amplifier driver");
225MODULE_LICENSE("GPL v2");