1/*
2 * max9877.c  --  amp driver for max9877
3 *
4 * Copyright (C) 2009 Samsung Electronics Co.Ltd
5 * Author: Joonyoung Shim <jy0922.shim@samsung.com>
6 *
7 *  This program is free software; you can redistribute  it and/or modify it
8 *  under  the terms of  the GNU General  Public License as published by the
9 *  Free Software Foundation;  either version 2 of the  License, or (at your
10 *  option) any later version.
11 *
12 */
13
14#include <linux/module.h>
15#include <linux/init.h>
16#include <linux/i2c.h>
17#include <linux/regmap.h>
18#include <sound/soc.h>
19#include <sound/tlv.h>
20
21#include "max9877.h"
22
23static struct regmap *regmap;
24
25static struct reg_default max9877_regs[] = {
26	{ 0, 0x40 },
27	{ 1, 0x00 },
28	{ 2, 0x00 },
29	{ 3, 0x00 },
30	{ 4, 0x49 },
31};
32
33static const unsigned int max9877_pgain_tlv[] = {
34	TLV_DB_RANGE_HEAD(2),
35	0, 1, TLV_DB_SCALE_ITEM(0, 900, 0),
36	2, 2, TLV_DB_SCALE_ITEM(2000, 0, 0),
37};
38
39static const unsigned int max9877_output_tlv[] = {
40	TLV_DB_RANGE_HEAD(4),
41	0, 7, TLV_DB_SCALE_ITEM(-7900, 400, 1),
42	8, 15, TLV_DB_SCALE_ITEM(-4700, 300, 0),
43	16, 23, TLV_DB_SCALE_ITEM(-2300, 200, 0),
44	24, 31, TLV_DB_SCALE_ITEM(-700, 100, 0),
45};
46
47static const char *max9877_out_mode[] = {
48	"INA -> SPK",
49	"INA -> HP",
50	"INA -> SPK and HP",
51	"INB -> SPK",
52	"INB -> HP",
53	"INB -> SPK and HP",
54	"INA + INB -> SPK",
55	"INA + INB -> HP",
56	"INA + INB -> SPK and HP",
57};
58
59static const char *max9877_osc_mode[] = {
60	"1176KHz",
61	"1100KHz",
62	"700KHz",
63};
64
65static const struct soc_enum max9877_enum[] = {
66	SOC_ENUM_SINGLE(MAX9877_OUTPUT_MODE, 0, ARRAY_SIZE(max9877_out_mode),
67			max9877_out_mode),
68	SOC_ENUM_SINGLE(MAX9877_OUTPUT_MODE, MAX9877_OSC_OFFSET,
69			ARRAY_SIZE(max9877_osc_mode), max9877_osc_mode),
70};
71
72static const struct snd_kcontrol_new max9877_controls[] = {
73	SOC_SINGLE_TLV("MAX9877 PGAINA Playback Volume",
74		       MAX9877_INPUT_MODE, 0, 2, 0, max9877_pgain_tlv),
75	SOC_SINGLE_TLV("MAX9877 PGAINB Playback Volume",
76		       MAX9877_INPUT_MODE, 2, 2, 0, max9877_pgain_tlv),
77	SOC_SINGLE_TLV("MAX9877 Amp Speaker Playback Volume",
78		       MAX9877_SPK_VOLUME, 0, 31, 0, max9877_output_tlv),
79	SOC_DOUBLE_R_TLV("MAX9877 Amp HP Playback Volume",
80			 MAX9877_HPL_VOLUME, MAX9877_HPR_VOLUME, 0, 31, 0,
81			 max9877_output_tlv),
82	SOC_SINGLE("MAX9877 INB Stereo Switch",
83		   MAX9877_INPUT_MODE, 4, 1, 1),
84	SOC_SINGLE("MAX9877 INA Stereo Switch",
85		   MAX9877_INPUT_MODE, 5, 1, 1),
86	SOC_SINGLE("MAX9877 Zero-crossing detection Switch",
87		   MAX9877_INPUT_MODE, 6, 1, 0),
88	SOC_SINGLE("MAX9877 Bypass Mode Switch",
89		   MAX9877_OUTPUT_MODE, 6, 1, 0),
90	SOC_ENUM("MAX9877 Output Mode", max9877_enum[0]),
91	SOC_ENUM("MAX9877 Oscillator Mode", max9877_enum[1]),
92};
93
94static const struct snd_soc_dapm_widget max9877_dapm_widgets[] = {
95SND_SOC_DAPM_INPUT("INA1"),
96SND_SOC_DAPM_INPUT("INA2"),
97SND_SOC_DAPM_INPUT("INB1"),
98SND_SOC_DAPM_INPUT("INB2"),
99SND_SOC_DAPM_INPUT("RXIN+"),
100SND_SOC_DAPM_INPUT("RXIN-"),
101
102SND_SOC_DAPM_PGA("SHDN", MAX9877_OUTPUT_MODE, 7, 1, NULL, 0),
103
104SND_SOC_DAPM_OUTPUT("OUT+"),
105SND_SOC_DAPM_OUTPUT("OUT-"),
106SND_SOC_DAPM_OUTPUT("HPL"),
107SND_SOC_DAPM_OUTPUT("HPR"),
108};
109
110static const struct snd_soc_dapm_route max9877_dapm_routes[] = {
111	{ "SHDN", NULL, "INA1" },
112	{ "SHDN", NULL, "INA2" },
113	{ "SHDN", NULL, "INB1" },
114	{ "SHDN", NULL, "INB2" },
115
116	{ "OUT+", NULL, "RXIN+" },
117	{ "OUT+", NULL, "SHDN" },
118
119	{ "OUT-", NULL, "SHDN" },
120	{ "OUT-", NULL, "RXIN-" },
121
122	{ "HPL", NULL, "SHDN" },
123	{ "HPR", NULL, "SHDN" },
124};
125
126static const struct snd_soc_codec_driver max9877_codec = {
127	.controls = max9877_controls,
128	.num_controls = ARRAY_SIZE(max9877_controls),
129
130	.dapm_widgets = max9877_dapm_widgets,
131	.num_dapm_widgets = ARRAY_SIZE(max9877_dapm_widgets),
132	.dapm_routes = max9877_dapm_routes,
133	.num_dapm_routes = ARRAY_SIZE(max9877_dapm_routes),
134};
135
136static const struct regmap_config max9877_regmap = {
137	.reg_bits = 8,
138	.val_bits = 8,
139
140	.reg_defaults = max9877_regs,
141	.num_reg_defaults = ARRAY_SIZE(max9877_regs),
142	.cache_type = REGCACHE_RBTREE,
143};
144
145static int max9877_i2c_probe(struct i2c_client *client,
146			     const struct i2c_device_id *id)
147{
148	int i;
149
150	regmap = devm_regmap_init_i2c(client, &max9877_regmap);
151	if (IS_ERR(regmap))
152		return PTR_ERR(regmap);
153
154	/* Ensure the device is in reset state */
155	for (i = 0; i < ARRAY_SIZE(max9877_regs); i++)
156		regmap_write(regmap, max9877_regs[i].reg, max9877_regs[i].def);
157
158	return snd_soc_register_codec(&client->dev, &max9877_codec, NULL, 0);
159}
160
161static int max9877_i2c_remove(struct i2c_client *client)
162{
163	snd_soc_unregister_codec(&client->dev);
164
165	return 0;
166}
167
168static const struct i2c_device_id max9877_i2c_id[] = {
169	{ "max9877", 0 },
170	{ }
171};
172MODULE_DEVICE_TABLE(i2c, max9877_i2c_id);
173
174static struct i2c_driver max9877_i2c_driver = {
175	.driver = {
176		.name = "max9877",
177		.owner = THIS_MODULE,
178	},
179	.probe = max9877_i2c_probe,
180	.remove = max9877_i2c_remove,
181	.id_table = max9877_i2c_id,
182};
183
184module_i2c_driver(max9877_i2c_driver);
185
186MODULE_DESCRIPTION("ASoC MAX9877 amp driver");
187MODULE_AUTHOR("Joonyoung Shim <jy0922.shim@samsung.com>");
188MODULE_LICENSE("GPL");
189