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 | |
18 | static const struct reg_default max9877_regs[] = { |
19 | { 0, 0x40 }, |
20 | { 1, 0x00 }, |
21 | { 2, 0x00 }, |
22 | { 3, 0x00 }, |
23 | { 4, 0x49 }, |
24 | }; |
25 | |
26 | static 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 | |
31 | static 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 | |
38 | static 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 | |
50 | static const char *max9877_osc_mode[] = { |
51 | "1176KHz" , |
52 | "1100KHz" , |
53 | "700KHz" , |
54 | }; |
55 | |
56 | static 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 | |
63 | static 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 | |
85 | static const struct snd_soc_dapm_widget max9877_dapm_widgets[] = { |
86 | SND_SOC_DAPM_INPUT("INA1" ), |
87 | SND_SOC_DAPM_INPUT("INA2" ), |
88 | SND_SOC_DAPM_INPUT("INB1" ), |
89 | SND_SOC_DAPM_INPUT("INB2" ), |
90 | SND_SOC_DAPM_INPUT("RXIN+" ), |
91 | SND_SOC_DAPM_INPUT("RXIN-" ), |
92 | |
93 | SND_SOC_DAPM_PGA("SHDN" , MAX9877_OUTPUT_MODE, 7, 1, NULL, 0), |
94 | |
95 | SND_SOC_DAPM_OUTPUT("OUT+" ), |
96 | SND_SOC_DAPM_OUTPUT("OUT-" ), |
97 | SND_SOC_DAPM_OUTPUT("HPL" ), |
98 | SND_SOC_DAPM_OUTPUT("HPR" ), |
99 | }; |
100 | |
101 | static 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 | |
117 | static 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 | |
127 | static 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 | |
136 | static 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(ptr: regmap)) |
143 | return PTR_ERR(ptr: regmap); |
144 | |
145 | /* Ensure the device is in reset state */ |
146 | for (i = 0; i < ARRAY_SIZE(max9877_regs); i++) |
147 | regmap_write(map: regmap, reg: max9877_regs[i].reg, val: max9877_regs[i].def); |
148 | |
149 | return devm_snd_soc_register_component(dev: &client->dev, |
150 | component_driver: &max9877_component_driver, NULL, num_dai: 0); |
151 | } |
152 | |
153 | static const struct i2c_device_id max9877_i2c_id[] = { |
154 | { "max9877" , 0 }, |
155 | { } |
156 | }; |
157 | MODULE_DEVICE_TABLE(i2c, max9877_i2c_id); |
158 | |
159 | static 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 | |
167 | module_i2c_driver(max9877_i2c_driver); |
168 | |
169 | MODULE_DESCRIPTION("ASoC MAX9877 amp driver" ); |
170 | MODULE_AUTHOR("Joonyoung Shim <jy0922.shim@samsung.com>" ); |
171 | MODULE_LICENSE("GPL" ); |
172 | |