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 | |
28 | struct max9768 { |
29 | struct regmap *regmap; |
30 | struct gpio_desc *mute; |
31 | struct gpio_desc *shdn; |
32 | u32 flags; |
33 | }; |
34 | |
35 | static const struct reg_default max9768_default_regs[] = { |
36 | { 0, 0 }, |
37 | { 3, MAX9768_CTRL_FILTERLESS}, |
38 | }; |
39 | |
40 | static 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(desc: max9768->mute); |
46 | |
47 | ucontrol->value.integer.value[0] = !val; |
48 | |
49 | return 0; |
50 | } |
51 | |
52 | static 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(desc: max9768->mute, value: !ucontrol->value.integer.value[0]); |
59 | |
60 | return 0; |
61 | } |
62 | |
63 | static 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 | |
109 | static const struct snd_kcontrol_new max9768_volume[] = { |
110 | SOC_SINGLE_TLV("Playback Volume" , MAX9768_VOL, 0, 63, 0, volume_tlv), |
111 | }; |
112 | |
113 | static const struct snd_kcontrol_new max9768_mute[] = { |
114 | SOC_SINGLE_BOOL_EXT("Playback Switch" , 0, max9768_get_gpio, max9768_set_gpio), |
115 | }; |
116 | |
117 | static const struct snd_soc_dapm_widget max9768_dapm_widgets[] = { |
118 | SND_SOC_DAPM_INPUT("IN" ), |
119 | |
120 | SND_SOC_DAPM_OUTPUT("OUT+" ), |
121 | SND_SOC_DAPM_OUTPUT("OUT-" ), |
122 | }; |
123 | |
124 | static const struct snd_soc_dapm_route max9768_dapm_routes[] = { |
125 | { "OUT+" , NULL, "IN" }, |
126 | { "OUT-" , NULL, "IN" }, |
127 | }; |
128 | |
129 | static int max9768_probe(struct snd_soc_component *component) |
130 | { |
131 | struct max9768 *max9768 = snd_soc_component_get_drvdata(c: component); |
132 | int ret; |
133 | |
134 | if (max9768->flags & MAX9768_FLAG_CLASSIC_PWM) { |
135 | ret = regmap_write(map: 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, controls: max9768_mute, |
143 | ARRAY_SIZE(max9768_mute)); |
144 | if (ret) |
145 | return ret; |
146 | } |
147 | |
148 | return 0; |
149 | } |
150 | |
151 | static 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 | |
161 | static 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 | |
170 | static 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(dev: &client->dev, size: 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(dev: &client->dev, |
181 | con_id: "mute" , |
182 | flags: GPIOD_OUT_HIGH); |
183 | if (IS_ERR(ptr: max9768->mute)) |
184 | return PTR_ERR(ptr: max9768->mute); |
185 | gpiod_set_consumer_name(desc: max9768->mute, name: "MAX9768 Mute" ); |
186 | |
187 | /* Activate chip by releasing shutdown, enables I2C */ |
188 | max9768->shdn = devm_gpiod_get_optional(dev: &client->dev, |
189 | con_id: "shutdown" , |
190 | flags: GPIOD_OUT_HIGH); |
191 | if (IS_ERR(ptr: max9768->shdn)) |
192 | return PTR_ERR(ptr: max9768->shdn); |
193 | gpiod_set_consumer_name(desc: max9768->shdn, name: "MAX9768 Shutdown" ); |
194 | |
195 | if (pdata) |
196 | max9768->flags = pdata->flags; |
197 | |
198 | i2c_set_clientdata(client, data: max9768); |
199 | |
200 | max9768->regmap = devm_regmap_init_i2c(client, &max9768_i2c_regmap_config); |
201 | if (IS_ERR(ptr: max9768->regmap)) |
202 | return PTR_ERR(ptr: max9768->regmap); |
203 | |
204 | return devm_snd_soc_register_component(dev: &client->dev, |
205 | component_driver: &max9768_component_driver, NULL, num_dai: 0); |
206 | } |
207 | |
208 | static const struct i2c_device_id max9768_i2c_id[] = { |
209 | { "max9768" , 0 }, |
210 | { } |
211 | }; |
212 | MODULE_DEVICE_TABLE(i2c, max9768_i2c_id); |
213 | |
214 | static struct i2c_driver max9768_i2c_driver = { |
215 | .driver = { |
216 | .name = "max9768" , |
217 | }, |
218 | .probe = max9768_i2c_probe, |
219 | .id_table = max9768_i2c_id, |
220 | }; |
221 | module_i2c_driver(max9768_i2c_driver); |
222 | |
223 | MODULE_AUTHOR("Wolfram Sang <kernel@pengutronix.de>" ); |
224 | MODULE_DESCRIPTION("ASoC MAX9768 amplifier driver" ); |
225 | MODULE_LICENSE("GPL v2" ); |
226 | |