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394d2bba WS |
1 | /* |
2 | * MAX9768 AMP driver | |
3 | * | |
4 | * Copyright (C) 2011, 2012 by Wolfram Sang, Pengutronix e.K. | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify it | |
7 | * under the terms of the GNU General Public License as published by the | |
8 | * Free Software Foundation; version 2 of the License. | |
9 | */ | |
10 | ||
11 | #include <linux/init.h> | |
12 | #include <linux/module.h> | |
13 | #include <linux/i2c.h> | |
14 | #include <linux/slab.h> | |
15 | #include <linux/gpio.h> | |
16 | #include <linux/regmap.h> | |
17 | ||
18 | #include <sound/core.h> | |
19 | #include <sound/soc.h> | |
20 | #include <sound/tlv.h> | |
21 | #include <sound/max9768.h> | |
22 | ||
23 | /* "Registers" */ | |
24 | #define MAX9768_VOL 0 | |
25 | #define MAX9768_CTRL 3 | |
26 | ||
27 | /* Commands */ | |
28 | #define MAX9768_CTRL_PWM 0x15 | |
29 | #define MAX9768_CTRL_FILTERLESS 0x16 | |
30 | ||
31 | struct max9768 { | |
32 | struct regmap *regmap; | |
33 | int mute_gpio; | |
34 | int shdn_gpio; | |
35 | u32 flags; | |
36 | }; | |
37 | ||
c418a84a | 38 | static const struct reg_default max9768_default_regs[] = { |
394d2bba WS |
39 | { 0, 0 }, |
40 | { 3, MAX9768_CTRL_FILTERLESS}, | |
41 | }; | |
42 | ||
43 | static int max9768_get_gpio(struct snd_kcontrol *kcontrol, | |
44 | struct snd_ctl_elem_value *ucontrol) | |
45 | { | |
04b5cbd8 LPC |
46 | struct snd_soc_component *c = snd_soc_kcontrol_component(kcontrol); |
47 | struct max9768 *max9768 = snd_soc_component_get_drvdata(c); | |
394d2bba WS |
48 | int val = gpio_get_value_cansleep(max9768->mute_gpio); |
49 | ||
50 | ucontrol->value.integer.value[0] = !val; | |
51 | ||
52 | return 0; | |
53 | } | |
54 | ||
55 | static int max9768_set_gpio(struct snd_kcontrol *kcontrol, | |
56 | struct snd_ctl_elem_value *ucontrol) | |
57 | { | |
04b5cbd8 LPC |
58 | struct snd_soc_component *c = snd_soc_kcontrol_component(kcontrol); |
59 | struct max9768 *max9768 = snd_soc_component_get_drvdata(c); | |
394d2bba WS |
60 | |
61 | gpio_set_value_cansleep(max9768->mute_gpio, !ucontrol->value.integer.value[0]); | |
62 | ||
63 | return 0; | |
64 | } | |
65 | ||
44744eec | 66 | static const DECLARE_TLV_DB_RANGE(volume_tlv, |
394d2bba WS |
67 | 0, 0, TLV_DB_SCALE_ITEM(-16150, 0, 0), |
68 | 1, 1, TLV_DB_SCALE_ITEM(-9280, 0, 0), | |
69 | 2, 2, TLV_DB_SCALE_ITEM(-9030, 0, 0), | |
70 | 3, 3, TLV_DB_SCALE_ITEM(-8680, 0, 0), | |
71 | 4, 4, TLV_DB_SCALE_ITEM(-8430, 0, 0), | |
72 | 5, 5, TLV_DB_SCALE_ITEM(-8080, 0, 0), | |
73 | 6, 6, TLV_DB_SCALE_ITEM(-7830, 0, 0), | |
74 | 7, 7, TLV_DB_SCALE_ITEM(-7470, 0, 0), | |
75 | 8, 8, TLV_DB_SCALE_ITEM(-7220, 0, 0), | |
76 | 9, 9, TLV_DB_SCALE_ITEM(-6870, 0, 0), | |
77 | 10, 10, TLV_DB_SCALE_ITEM(-6620, 0, 0), | |
78 | 11, 11, TLV_DB_SCALE_ITEM(-6270, 0, 0), | |
79 | 12, 12, TLV_DB_SCALE_ITEM(-6020, 0, 0), | |
80 | 13, 13, TLV_DB_SCALE_ITEM(-5670, 0, 0), | |
81 | 14, 14, TLV_DB_SCALE_ITEM(-5420, 0, 0), | |
82 | 15, 17, TLV_DB_SCALE_ITEM(-5060, 250, 0), | |
83 | 18, 18, TLV_DB_SCALE_ITEM(-4370, 0, 0), | |
84 | 19, 19, TLV_DB_SCALE_ITEM(-4210, 0, 0), | |
85 | 20, 20, TLV_DB_SCALE_ITEM(-3960, 0, 0), | |
86 | 21, 21, TLV_DB_SCALE_ITEM(-3760, 0, 0), | |
87 | 22, 22, TLV_DB_SCALE_ITEM(-3600, 0, 0), | |
88 | 23, 23, TLV_DB_SCALE_ITEM(-3340, 0, 0), | |
89 | 24, 24, TLV_DB_SCALE_ITEM(-3150, 0, 0), | |
90 | 25, 25, TLV_DB_SCALE_ITEM(-2980, 0, 0), | |
91 | 26, 26, TLV_DB_SCALE_ITEM(-2720, 0, 0), | |
92 | 27, 27, TLV_DB_SCALE_ITEM(-2520, 0, 0), | |
93 | 28, 30, TLV_DB_SCALE_ITEM(-2350, 190, 0), | |
94 | 31, 31, TLV_DB_SCALE_ITEM(-1750, 0, 0), | |
95 | 32, 34, TLV_DB_SCALE_ITEM(-1640, 100, 0), | |
96 | 35, 37, TLV_DB_SCALE_ITEM(-1310, 110, 0), | |
97 | 38, 39, TLV_DB_SCALE_ITEM(-990, 100, 0), | |
98 | 40, 40, TLV_DB_SCALE_ITEM(-710, 0, 0), | |
99 | 41, 41, TLV_DB_SCALE_ITEM(-600, 0, 0), | |
100 | 42, 42, TLV_DB_SCALE_ITEM(-500, 0, 0), | |
101 | 43, 43, TLV_DB_SCALE_ITEM(-340, 0, 0), | |
102 | 44, 44, TLV_DB_SCALE_ITEM(-190, 0, 0), | |
103 | 45, 45, TLV_DB_SCALE_ITEM(-50, 0, 0), | |
104 | 46, 46, TLV_DB_SCALE_ITEM(50, 0, 0), | |
105 | 47, 50, TLV_DB_SCALE_ITEM(120, 40, 0), | |
106 | 51, 57, TLV_DB_SCALE_ITEM(290, 50, 0), | |
107 | 58, 58, TLV_DB_SCALE_ITEM(650, 0, 0), | |
108 | 59, 62, TLV_DB_SCALE_ITEM(700, 60, 0), | |
44744eec LPC |
109 | 63, 63, TLV_DB_SCALE_ITEM(950, 0, 0) |
110 | ); | |
394d2bba WS |
111 | |
112 | static const struct snd_kcontrol_new max9768_volume[] = { | |
113 | SOC_SINGLE_TLV("Playback Volume", MAX9768_VOL, 0, 63, 0, volume_tlv), | |
114 | }; | |
115 | ||
116 | static const struct snd_kcontrol_new max9768_mute[] = { | |
69edea8a | 117 | SOC_SINGLE_BOOL_EXT("Playback Switch", 0, max9768_get_gpio, max9768_set_gpio), |
394d2bba WS |
118 | }; |
119 | ||
439fe8a7 MB |
120 | static const struct snd_soc_dapm_widget max9768_dapm_widgets[] = { |
121 | SND_SOC_DAPM_INPUT("IN"), | |
122 | ||
123 | SND_SOC_DAPM_OUTPUT("OUT+"), | |
124 | SND_SOC_DAPM_OUTPUT("OUT-"), | |
125 | }; | |
126 | ||
127 | static const struct snd_soc_dapm_route max9768_dapm_routes[] = { | |
128 | { "OUT+", NULL, "IN" }, | |
129 | { "OUT-", NULL, "IN" }, | |
130 | }; | |
131 | ||
04b5cbd8 | 132 | static int max9768_probe(struct snd_soc_component *component) |
394d2bba | 133 | { |
04b5cbd8 | 134 | struct max9768 *max9768 = snd_soc_component_get_drvdata(component); |
394d2bba WS |
135 | int ret; |
136 | ||
394d2bba | 137 | if (max9768->flags & MAX9768_FLAG_CLASSIC_PWM) { |
04b5cbd8 LPC |
138 | ret = regmap_write(max9768->regmap, MAX9768_CTRL, |
139 | MAX9768_CTRL_PWM); | |
394d2bba WS |
140 | if (ret) |
141 | return ret; | |
142 | } | |
143 | ||
144 | if (gpio_is_valid(max9768->mute_gpio)) { | |
04b5cbd8 | 145 | ret = snd_soc_add_component_controls(component, max9768_mute, |
394d2bba WS |
146 | ARRAY_SIZE(max9768_mute)); |
147 | if (ret) | |
148 | return ret; | |
149 | } | |
150 | ||
151 | return 0; | |
152 | } | |
153 | ||
6e37f933 | 154 | static const struct snd_soc_component_driver max9768_component_driver = { |
394d2bba WS |
155 | .probe = max9768_probe, |
156 | .controls = max9768_volume, | |
157 | .num_controls = ARRAY_SIZE(max9768_volume), | |
439fe8a7 MB |
158 | .dapm_widgets = max9768_dapm_widgets, |
159 | .num_dapm_widgets = ARRAY_SIZE(max9768_dapm_widgets), | |
160 | .dapm_routes = max9768_dapm_routes, | |
161 | .num_dapm_routes = ARRAY_SIZE(max9768_dapm_routes), | |
394d2bba WS |
162 | }; |
163 | ||
394d2bba WS |
164 | static const struct regmap_config max9768_i2c_regmap_config = { |
165 | .reg_bits = 2, | |
166 | .val_bits = 6, | |
167 | .max_register = 3, | |
168 | .reg_defaults = max9768_default_regs, | |
169 | .num_reg_defaults = ARRAY_SIZE(max9768_default_regs), | |
394d2bba WS |
170 | .cache_type = REGCACHE_RBTREE, |
171 | }; | |
172 | ||
7a79e94e BP |
173 | static int max9768_i2c_probe(struct i2c_client *client, |
174 | const struct i2c_device_id *id) | |
394d2bba WS |
175 | { |
176 | struct max9768 *max9768; | |
177 | struct max9768_pdata *pdata = client->dev.platform_data; | |
178 | int err; | |
179 | ||
180 | max9768 = devm_kzalloc(&client->dev, sizeof(*max9768), GFP_KERNEL); | |
181 | if (!max9768) | |
182 | return -ENOMEM; | |
183 | ||
184 | if (pdata) { | |
185 | /* Mute on powerup to avoid clicks */ | |
d79cca1a LPC |
186 | err = devm_gpio_request_one(&client->dev, pdata->mute_gpio, |
187 | GPIOF_INIT_HIGH, "MAX9768 Mute"); | |
394d2bba WS |
188 | max9768->mute_gpio = err ?: pdata->mute_gpio; |
189 | ||
190 | /* Activate chip by releasing shutdown, enables I2C */ | |
d79cca1a LPC |
191 | err = devm_gpio_request_one(&client->dev, pdata->shdn_gpio, |
192 | GPIOF_INIT_HIGH, "MAX9768 Shutdown"); | |
394d2bba WS |
193 | max9768->shdn_gpio = err ?: pdata->shdn_gpio; |
194 | ||
195 | max9768->flags = pdata->flags; | |
196 | } else { | |
197 | max9768->shdn_gpio = -EINVAL; | |
198 | max9768->mute_gpio = -EINVAL; | |
199 | } | |
200 | ||
201 | i2c_set_clientdata(client, max9768); | |
202 | ||
8f255e7b | 203 | max9768->regmap = devm_regmap_init_i2c(client, &max9768_i2c_regmap_config); |
d79cca1a LPC |
204 | if (IS_ERR(max9768->regmap)) |
205 | return PTR_ERR(max9768->regmap); | |
394d2bba | 206 | |
04b5cbd8 LPC |
207 | return devm_snd_soc_register_component(&client->dev, |
208 | &max9768_component_driver, NULL, 0); | |
394d2bba WS |
209 | } |
210 | ||
211 | static const struct i2c_device_id max9768_i2c_id[] = { | |
212 | { "max9768", 0 }, | |
213 | { } | |
214 | }; | |
215 | MODULE_DEVICE_TABLE(i2c, max9768_i2c_id); | |
216 | ||
217 | static struct i2c_driver max9768_i2c_driver = { | |
218 | .driver = { | |
219 | .name = "max9768", | |
394d2bba WS |
220 | }, |
221 | .probe = max9768_i2c_probe, | |
394d2bba WS |
222 | .id_table = max9768_i2c_id, |
223 | }; | |
224 | module_i2c_driver(max9768_i2c_driver); | |
225 | ||
226 | MODULE_AUTHOR("Wolfram Sang <w.sang@pengutronix.de>"); | |
227 | MODULE_DESCRIPTION("ASoC MAX9768 amplifier driver"); | |
228 | MODULE_LICENSE("GPL v2"); |