1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * max9877.c  --  amp driver for max9877
4 *
5 * Copyright (C) 2009 Samsung Electronics Co.Ltd
6 * Author: Joonyoung Shim <jy0922.shim@samsung.com>
7 */
8
9#include <linux/module.h>
10#include <linux/init.h>
11#include <linux/i2c.h>
12#include <linux/regmap.h>
13#include <sound/soc.h>
14#include <sound/tlv.h>
15
16#include "max9877.h"
17
18static const struct reg_default max9877_regs[] = {
19	{ 0, 0x40 },
20	{ 1, 0x00 },
21	{ 2, 0x00 },
22	{ 3, 0x00 },
23	{ 4, 0x49 },
24};
25
26static const DECLARE_TLV_DB_RANGE(max9877_pgain_tlv,
27	0, 1, TLV_DB_SCALE_ITEM(0, 900, 0),
28	2, 2, TLV_DB_SCALE_ITEM(2000, 0, 0)
29);
30
31static const DECLARE_TLV_DB_RANGE(max9877_output_tlv,
32	0, 7, TLV_DB_SCALE_ITEM(-7900, 400, 1),
33	8, 15, TLV_DB_SCALE_ITEM(-4700, 300, 0),
34	16, 23, TLV_DB_SCALE_ITEM(-2300, 200, 0),
35	24, 31, TLV_DB_SCALE_ITEM(-700, 100, 0)
36);
37
38static const char *max9877_out_mode[] = {
39	"INA -> SPK",
40	"INA -> HP",
41	"INA -> SPK and HP",
42	"INB -> SPK",
43	"INB -> HP",
44	"INB -> SPK and HP",
45	"INA + INB -> SPK",
46	"INA + INB -> HP",
47	"INA + INB -> SPK and HP",
48};
49
50static const char *max9877_osc_mode[] = {
51	"1176KHz",
52	"1100KHz",
53	"700KHz",
54};
55
56static const struct soc_enum max9877_enum[] = {
57	SOC_ENUM_SINGLE(MAX9877_OUTPUT_MODE, 0, ARRAY_SIZE(max9877_out_mode),
58			max9877_out_mode),
59	SOC_ENUM_SINGLE(MAX9877_OUTPUT_MODE, MAX9877_OSC_OFFSET,
60			ARRAY_SIZE(max9877_osc_mode), max9877_osc_mode),
61};
62
63static const struct snd_kcontrol_new max9877_controls[] = {
64	SOC_SINGLE_TLV("MAX9877 PGAINA Playback Volume",
65		       MAX9877_INPUT_MODE, 0, 2, 0, max9877_pgain_tlv),
66	SOC_SINGLE_TLV("MAX9877 PGAINB Playback Volume",
67		       MAX9877_INPUT_MODE, 2, 2, 0, max9877_pgain_tlv),
68	SOC_SINGLE_TLV("MAX9877 Amp Speaker Playback Volume",
69		       MAX9877_SPK_VOLUME, 0, 31, 0, max9877_output_tlv),
70	SOC_DOUBLE_R_TLV("MAX9877 Amp HP Playback Volume",
71			 MAX9877_HPL_VOLUME, MAX9877_HPR_VOLUME, 0, 31, 0,
72			 max9877_output_tlv),
73	SOC_SINGLE("MAX9877 INB Stereo Switch",
74		   MAX9877_INPUT_MODE, 4, 1, 1),
75	SOC_SINGLE("MAX9877 INA Stereo Switch",
76		   MAX9877_INPUT_MODE, 5, 1, 1),
77	SOC_SINGLE("MAX9877 Zero-crossing detection Switch",
78		   MAX9877_INPUT_MODE, 6, 1, 0),
79	SOC_SINGLE("MAX9877 Bypass Mode Switch",
80		   MAX9877_OUTPUT_MODE, 6, 1, 0),
81	SOC_ENUM("MAX9877 Output Mode", max9877_enum[0]),
82	SOC_ENUM("MAX9877 Oscillator Mode", max9877_enum[1]),
83};
84
85static const struct snd_soc_dapm_widget max9877_dapm_widgets[] = {
86SND_SOC_DAPM_INPUT("INA1"),
87SND_SOC_DAPM_INPUT("INA2"),
88SND_SOC_DAPM_INPUT("INB1"),
89SND_SOC_DAPM_INPUT("INB2"),
90SND_SOC_DAPM_INPUT("RXIN+"),
91SND_SOC_DAPM_INPUT("RXIN-"),
92
93SND_SOC_DAPM_PGA("SHDN", MAX9877_OUTPUT_MODE, 7, 1, NULL, 0),
94
95SND_SOC_DAPM_OUTPUT("OUT+"),
96SND_SOC_DAPM_OUTPUT("OUT-"),
97SND_SOC_DAPM_OUTPUT("HPL"),
98SND_SOC_DAPM_OUTPUT("HPR"),
99};
100
101static const struct snd_soc_dapm_route max9877_dapm_routes[] = {
102	{ "SHDN", NULL, "INA1" },
103	{ "SHDN", NULL, "INA2" },
104	{ "SHDN", NULL, "INB1" },
105	{ "SHDN", NULL, "INB2" },
106
107	{ "OUT+", NULL, "RXIN+" },
108	{ "OUT+", NULL, "SHDN" },
109
110	{ "OUT-", NULL, "SHDN" },
111	{ "OUT-", NULL, "RXIN-" },
112
113	{ "HPL", NULL, "SHDN" },
114	{ "HPR", NULL, "SHDN" },
115};
116
117static const struct snd_soc_component_driver max9877_component_driver = {
118	.controls = max9877_controls,
119	.num_controls = ARRAY_SIZE(max9877_controls),
120
121	.dapm_widgets = max9877_dapm_widgets,
122	.num_dapm_widgets = ARRAY_SIZE(max9877_dapm_widgets),
123	.dapm_routes = max9877_dapm_routes,
124	.num_dapm_routes = ARRAY_SIZE(max9877_dapm_routes),
125};
126
127static const struct regmap_config max9877_regmap = {
128	.reg_bits = 8,
129	.val_bits = 8,
130
131	.reg_defaults = max9877_regs,
132	.num_reg_defaults = ARRAY_SIZE(max9877_regs),
133	.cache_type = REGCACHE_RBTREE,
134};
135
136static int max9877_i2c_probe(struct i2c_client *client)
137{
138	struct regmap *regmap;
139	int i;
140
141	regmap = devm_regmap_init_i2c(client, &max9877_regmap);
142	if (IS_ERR(regmap))
143		return PTR_ERR(regmap);
144
145	/* Ensure the device is in reset state */
146	for (i = 0; i < ARRAY_SIZE(max9877_regs); i++)
147		regmap_write(regmap, max9877_regs[i].reg, max9877_regs[i].def);
148
149	return devm_snd_soc_register_component(&client->dev,
150			&max9877_component_driver, NULL, 0);
151}
152
153static const struct i2c_device_id max9877_i2c_id[] = {
154	{ "max9877", 0 },
155	{ }
156};
157MODULE_DEVICE_TABLE(i2c, max9877_i2c_id);
158
159static struct i2c_driver max9877_i2c_driver = {
160	.driver = {
161		.name = "max9877",
162	},
163	.probe = max9877_i2c_probe,
164	.id_table = max9877_i2c_id,
165};
166
167module_i2c_driver(max9877_i2c_driver);
168
169MODULE_DESCRIPTION("ASoC MAX9877 amp driver");
170MODULE_AUTHOR("Joonyoung Shim <jy0922.shim@samsung.com>");
171MODULE_LICENSE("GPL");
172