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1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * LM4857 AMP driver
4 *
5 * Copyright 2007 Wolfson Microelectronics PLC.
6 * Author: Graeme Gregory
7 * graeme.gregory@wolfsonmicro.com
8 * Copyright 2011 Lars-Peter Clausen <lars@metafoo.de>
9 */
10
11#include <linux/init.h>
12#include <linux/module.h>
13#include <linux/i2c.h>
14#include <linux/regmap.h>
15#include <linux/slab.h>
16
17#include <sound/core.h>
18#include <sound/soc.h>
19#include <sound/tlv.h>
20
21static const struct reg_default lm4857_default_regs[] = {
22 { 0x0, 0x00 },
23 { 0x1, 0x00 },
24 { 0x2, 0x00 },
25 { 0x3, 0x00 },
26};
27
28/* The register offsets in the cache array */
29#define LM4857_MVOL 0
30#define LM4857_LVOL 1
31#define LM4857_RVOL 2
32#define LM4857_CTRL 3
33
34/* the shifts required to set these bits */
35#define LM4857_3D 5
36#define LM4857_WAKEUP 5
37#define LM4857_EPGAIN 4
38
39static const unsigned int lm4857_mode_values[] = {
40 0,
41 6,
42 7,
43 8,
44 9,
45};
46
47static const char * const lm4857_mode_texts[] = {
48 "Off",
49 "Earpiece",
50 "Loudspeaker",
51 "Loudspeaker + Headphone",
52 "Headphone",
53};
54
55static SOC_VALUE_ENUM_SINGLE_AUTODISABLE_DECL(lm4857_mode_enum,
56 LM4857_CTRL, 0, 0xf, lm4857_mode_texts, lm4857_mode_values);
57
58static const struct snd_kcontrol_new lm4857_mode_ctrl =
59 SOC_DAPM_ENUM("Mode", lm4857_mode_enum);
60
61static const struct snd_soc_dapm_widget lm4857_dapm_widgets[] = {
62 SND_SOC_DAPM_INPUT("IN"),
63
64 SND_SOC_DAPM_DEMUX("Mode", SND_SOC_NOPM, 0, 0, &lm4857_mode_ctrl),
65
66 SND_SOC_DAPM_OUTPUT("LS"),
67 SND_SOC_DAPM_OUTPUT("HP"),
68 SND_SOC_DAPM_OUTPUT("EP"),
69};
70
71static const DECLARE_TLV_DB_SCALE(stereo_tlv, -4050, 150, 0);
72static const DECLARE_TLV_DB_SCALE(mono_tlv, -3450, 150, 0);
73
74static const struct snd_kcontrol_new lm4857_controls[] = {
75 SOC_SINGLE_TLV("Left Playback Volume", LM4857_LVOL, 0, 31, 0,
76 stereo_tlv),
77 SOC_SINGLE_TLV("Right Playback Volume", LM4857_RVOL, 0, 31, 0,
78 stereo_tlv),
79 SOC_SINGLE_TLV("Mono Playback Volume", LM4857_MVOL, 0, 31, 0,
80 mono_tlv),
81 SOC_SINGLE("Spk 3D Playback Switch", LM4857_LVOL, LM4857_3D, 1, 0),
82 SOC_SINGLE("HP 3D Playback Switch", LM4857_RVOL, LM4857_3D, 1, 0),
83 SOC_SINGLE("Fast Wakeup Playback Switch", LM4857_CTRL,
84 LM4857_WAKEUP, 1, 0),
85 SOC_SINGLE("Earpiece 6dB Playback Switch", LM4857_CTRL,
86 LM4857_EPGAIN, 1, 0),
87};
88
89static const struct snd_soc_dapm_route lm4857_routes[] = {
90 { "Mode", NULL, "IN" },
91 { "LS", "Loudspeaker", "Mode" },
92 { "LS", "Loudspeaker + Headphone", "Mode" },
93 { "HP", "Headphone", "Mode" },
94 { "HP", "Loudspeaker + Headphone", "Mode" },
95 { "EP", "Earpiece", "Mode" },
96};
97
98static const struct snd_soc_component_driver lm4857_component_driver = {
99 .controls = lm4857_controls,
100 .num_controls = ARRAY_SIZE(lm4857_controls),
101 .dapm_widgets = lm4857_dapm_widgets,
102 .num_dapm_widgets = ARRAY_SIZE(lm4857_dapm_widgets),
103 .dapm_routes = lm4857_routes,
104 .num_dapm_routes = ARRAY_SIZE(lm4857_routes),
105};
106
107static const struct regmap_config lm4857_regmap_config = {
108 .val_bits = 6,
109 .reg_bits = 2,
110
111 .max_register = LM4857_CTRL,
112
113 .cache_type = REGCACHE_FLAT,
114 .reg_defaults = lm4857_default_regs,
115 .num_reg_defaults = ARRAY_SIZE(lm4857_default_regs),
116};
117
118static int lm4857_i2c_probe(struct i2c_client *i2c)
119{
120 struct regmap *regmap;
121
122 regmap = devm_regmap_init_i2c(i2c, &lm4857_regmap_config);
123 if (IS_ERR(regmap))
124 return PTR_ERR(regmap);
125
126 return devm_snd_soc_register_component(&i2c->dev,
127 &lm4857_component_driver, NULL, 0);
128}
129
130static const struct i2c_device_id lm4857_i2c_id[] = {
131 { "lm4857" },
132 { }
133};
134MODULE_DEVICE_TABLE(i2c, lm4857_i2c_id);
135
136static struct i2c_driver lm4857_i2c_driver = {
137 .driver = {
138 .name = "lm4857",
139 },
140 .probe = lm4857_i2c_probe,
141 .id_table = lm4857_i2c_id,
142};
143
144module_i2c_driver(lm4857_i2c_driver);
145
146MODULE_AUTHOR("Lars-Peter Clausen <lars@metafoo.de>");
147MODULE_DESCRIPTION("LM4857 amplifier driver");
148MODULE_LICENSE("GPL");
1/*
2 * LM4857 AMP driver
3 *
4 * Copyright 2007 Wolfson Microelectronics PLC.
5 * Author: Graeme Gregory
6 * graeme.gregory@wolfsonmicro.com or linux@wolfsonmicro.com
7 * Copyright 2011 Lars-Peter Clausen <lars@metafoo.de>
8 *
9 * This program is free software; you can redistribute it and/or modify it
10 * under the terms of the GNU General Public License as published by the
11 * Free Software Foundation; either version 2 of the License, or (at your
12 * option) any later version.
13 *
14 */
15
16#include <linux/init.h>
17#include <linux/module.h>
18#include <linux/i2c.h>
19#include <linux/slab.h>
20
21#include <sound/core.h>
22#include <sound/soc.h>
23#include <sound/tlv.h>
24
25struct lm4857 {
26 struct i2c_client *i2c;
27 uint8_t mode;
28};
29
30static const uint8_t lm4857_default_regs[] = {
31 0x00, 0x00, 0x00, 0x00,
32};
33
34/* The register offsets in the cache array */
35#define LM4857_MVOL 0
36#define LM4857_LVOL 1
37#define LM4857_RVOL 2
38#define LM4857_CTRL 3
39
40/* the shifts required to set these bits */
41#define LM4857_3D 5
42#define LM4857_WAKEUP 5
43#define LM4857_EPGAIN 4
44
45static int lm4857_write(struct snd_soc_codec *codec, unsigned int reg,
46 unsigned int value)
47{
48 uint8_t data;
49 int ret;
50
51 ret = snd_soc_cache_write(codec, reg, value);
52 if (ret < 0)
53 return ret;
54
55 data = (reg << 6) | value;
56 ret = i2c_master_send(codec->control_data, &data, 1);
57 if (ret != 1) {
58 dev_err(codec->dev, "Failed to write register: %d\n", ret);
59 return ret;
60 }
61
62 return 0;
63}
64
65static unsigned int lm4857_read(struct snd_soc_codec *codec,
66 unsigned int reg)
67{
68 unsigned int val;
69 int ret;
70
71 ret = snd_soc_cache_read(codec, reg, &val);
72 if (ret)
73 return -1;
74
75 return val;
76}
77
78static int lm4857_get_mode(struct snd_kcontrol *kcontrol,
79 struct snd_ctl_elem_value *ucontrol)
80{
81 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
82 struct lm4857 *lm4857 = snd_soc_codec_get_drvdata(codec);
83
84 ucontrol->value.integer.value[0] = lm4857->mode;
85
86 return 0;
87}
88
89static int lm4857_set_mode(struct snd_kcontrol *kcontrol,
90 struct snd_ctl_elem_value *ucontrol)
91{
92 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
93 struct lm4857 *lm4857 = snd_soc_codec_get_drvdata(codec);
94 uint8_t value = ucontrol->value.integer.value[0];
95
96 lm4857->mode = value;
97
98 if (codec->dapm.bias_level == SND_SOC_BIAS_ON)
99 snd_soc_update_bits(codec, LM4857_CTRL, 0x0F, value + 6);
100
101 return 1;
102}
103
104static int lm4857_set_bias_level(struct snd_soc_codec *codec,
105 enum snd_soc_bias_level level)
106{
107 struct lm4857 *lm4857 = snd_soc_codec_get_drvdata(codec);
108
109 switch (level) {
110 case SND_SOC_BIAS_ON:
111 snd_soc_update_bits(codec, LM4857_CTRL, 0x0F, lm4857->mode + 6);
112 break;
113 case SND_SOC_BIAS_STANDBY:
114 snd_soc_update_bits(codec, LM4857_CTRL, 0x0F, 0);
115 break;
116 default:
117 break;
118 }
119
120 codec->dapm.bias_level = level;
121
122 return 0;
123}
124
125static const char *lm4857_mode[] = {
126 "Earpiece",
127 "Loudspeaker",
128 "Loudspeaker + Headphone",
129 "Headphone",
130};
131
132static const struct soc_enum lm4857_mode_enum =
133 SOC_ENUM_SINGLE_EXT(ARRAY_SIZE(lm4857_mode), lm4857_mode);
134
135static const struct snd_soc_dapm_widget lm4857_dapm_widgets[] = {
136 SND_SOC_DAPM_INPUT("IN"),
137
138 SND_SOC_DAPM_OUTPUT("LS"),
139 SND_SOC_DAPM_OUTPUT("HP"),
140 SND_SOC_DAPM_OUTPUT("EP"),
141};
142
143static const DECLARE_TLV_DB_SCALE(stereo_tlv, -4050, 150, 0);
144static const DECLARE_TLV_DB_SCALE(mono_tlv, -3450, 150, 0);
145
146static const struct snd_kcontrol_new lm4857_controls[] = {
147 SOC_SINGLE_TLV("Left Playback Volume", LM4857_LVOL, 0, 31, 0,
148 stereo_tlv),
149 SOC_SINGLE_TLV("Right Playback Volume", LM4857_RVOL, 0, 31, 0,
150 stereo_tlv),
151 SOC_SINGLE_TLV("Mono Playback Volume", LM4857_MVOL, 0, 31, 0,
152 mono_tlv),
153 SOC_SINGLE("Spk 3D Playback Switch", LM4857_LVOL, LM4857_3D, 1, 0),
154 SOC_SINGLE("HP 3D Playback Switch", LM4857_RVOL, LM4857_3D, 1, 0),
155 SOC_SINGLE("Fast Wakeup Playback Switch", LM4857_CTRL,
156 LM4857_WAKEUP, 1, 0),
157 SOC_SINGLE("Earpiece 6dB Playback Switch", LM4857_CTRL,
158 LM4857_EPGAIN, 1, 0),
159
160 SOC_ENUM_EXT("Mode", lm4857_mode_enum,
161 lm4857_get_mode, lm4857_set_mode),
162};
163
164/* There is a demux between the input signal and the output signals.
165 * Currently there is no easy way to model it in ASoC and since it does not make
166 * much of a difference in practice simply connect the input direclty to the
167 * outputs. */
168static const struct snd_soc_dapm_route lm4857_routes[] = {
169 {"LS", NULL, "IN"},
170 {"HP", NULL, "IN"},
171 {"EP", NULL, "IN"},
172};
173
174static int lm4857_probe(struct snd_soc_codec *codec)
175{
176 struct lm4857 *lm4857 = snd_soc_codec_get_drvdata(codec);
177 struct snd_soc_dapm_context *dapm = &codec->dapm;
178 int ret;
179
180 codec->control_data = lm4857->i2c;
181
182 ret = snd_soc_add_controls(codec, lm4857_controls,
183 ARRAY_SIZE(lm4857_controls));
184 if (ret)
185 return ret;
186
187 ret = snd_soc_dapm_new_controls(dapm, lm4857_dapm_widgets,
188 ARRAY_SIZE(lm4857_dapm_widgets));
189 if (ret)
190 return ret;
191
192 ret = snd_soc_dapm_add_routes(dapm, lm4857_routes,
193 ARRAY_SIZE(lm4857_routes));
194 if (ret)
195 return ret;
196
197 snd_soc_dapm_new_widgets(dapm);
198
199 return 0;
200}
201
202static struct snd_soc_codec_driver soc_codec_dev_lm4857 = {
203 .write = lm4857_write,
204 .read = lm4857_read,
205 .probe = lm4857_probe,
206 .reg_cache_size = ARRAY_SIZE(lm4857_default_regs),
207 .reg_word_size = sizeof(uint8_t),
208 .reg_cache_default = lm4857_default_regs,
209 .set_bias_level = lm4857_set_bias_level,
210};
211
212static int __devinit lm4857_i2c_probe(struct i2c_client *i2c,
213 const struct i2c_device_id *id)
214{
215 struct lm4857 *lm4857;
216 int ret;
217
218 lm4857 = kzalloc(sizeof(*lm4857), GFP_KERNEL);
219 if (!lm4857)
220 return -ENOMEM;
221
222 i2c_set_clientdata(i2c, lm4857);
223
224 lm4857->i2c = i2c;
225
226 ret = snd_soc_register_codec(&i2c->dev, &soc_codec_dev_lm4857, NULL, 0);
227
228 if (ret) {
229 kfree(lm4857);
230 return ret;
231 }
232
233 return 0;
234}
235
236static int __devexit lm4857_i2c_remove(struct i2c_client *i2c)
237{
238 struct lm4857 *lm4857 = i2c_get_clientdata(i2c);
239
240 snd_soc_unregister_codec(&i2c->dev);
241 kfree(lm4857);
242
243 return 0;
244}
245
246static const struct i2c_device_id lm4857_i2c_id[] = {
247 { "lm4857", 0 },
248 { }
249};
250MODULE_DEVICE_TABLE(i2c, lm4857_i2c_id);
251
252static struct i2c_driver lm4857_i2c_driver = {
253 .driver = {
254 .name = "lm4857",
255 .owner = THIS_MODULE,
256 },
257 .probe = lm4857_i2c_probe,
258 .remove = __devexit_p(lm4857_i2c_remove),
259 .id_table = lm4857_i2c_id,
260};
261
262static int __init lm4857_init(void)
263{
264 return i2c_add_driver(&lm4857_i2c_driver);
265}
266module_init(lm4857_init);
267
268static void __exit lm4857_exit(void)
269{
270 i2c_del_driver(&lm4857_i2c_driver);
271}
272module_exit(lm4857_exit);
273
274MODULE_AUTHOR("Lars-Peter Clausen <lars@metafoo.de>");
275MODULE_DESCRIPTION("LM4857 amplifier driver");
276MODULE_LICENSE("GPL");