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Wolfram Sang394d2bb2012-01-27 16:10:23 +01001/*
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
31struct max9768 {
32 struct regmap *regmap;
33 int mute_gpio;
34 int shdn_gpio;
35 u32 flags;
36};
37
38static struct reg_default max9768_default_regs[] = {
39 { 0, 0 },
40 { 3, MAX9768_CTRL_FILTERLESS},
41};
42
43static int max9768_get_gpio(struct snd_kcontrol *kcontrol,
44 struct snd_ctl_elem_value *ucontrol)
45{
Lars-Peter Clausenea53bf72014-03-18 09:02:04 +010046 struct snd_soc_codec *codec = snd_soc_kcontrol_codec(kcontrol);
Wolfram Sang394d2bb2012-01-27 16:10:23 +010047 struct max9768 *max9768 = snd_soc_codec_get_drvdata(codec);
48 int val = gpio_get_value_cansleep(max9768->mute_gpio);
49
50 ucontrol->value.integer.value[0] = !val;
51
52 return 0;
53}
54
55static int max9768_set_gpio(struct snd_kcontrol *kcontrol,
56 struct snd_ctl_elem_value *ucontrol)
57{
Lars-Peter Clausenea53bf72014-03-18 09:02:04 +010058 struct snd_soc_codec *codec = snd_soc_kcontrol_codec(kcontrol);
Wolfram Sang394d2bb2012-01-27 16:10:23 +010059 struct max9768 *max9768 = snd_soc_codec_get_drvdata(codec);
60
61 gpio_set_value_cansleep(max9768->mute_gpio, !ucontrol->value.integer.value[0]);
62
63 return 0;
64}
65
66static const unsigned int volume_tlv[] = {
67 TLV_DB_RANGE_HEAD(43),
68 0, 0, TLV_DB_SCALE_ITEM(-16150, 0, 0),
69 1, 1, TLV_DB_SCALE_ITEM(-9280, 0, 0),
70 2, 2, TLV_DB_SCALE_ITEM(-9030, 0, 0),
71 3, 3, TLV_DB_SCALE_ITEM(-8680, 0, 0),
72 4, 4, TLV_DB_SCALE_ITEM(-8430, 0, 0),
73 5, 5, TLV_DB_SCALE_ITEM(-8080, 0, 0),
74 6, 6, TLV_DB_SCALE_ITEM(-7830, 0, 0),
75 7, 7, TLV_DB_SCALE_ITEM(-7470, 0, 0),
76 8, 8, TLV_DB_SCALE_ITEM(-7220, 0, 0),
77 9, 9, TLV_DB_SCALE_ITEM(-6870, 0, 0),
78 10, 10, TLV_DB_SCALE_ITEM(-6620, 0, 0),
79 11, 11, TLV_DB_SCALE_ITEM(-6270, 0, 0),
80 12, 12, TLV_DB_SCALE_ITEM(-6020, 0, 0),
81 13, 13, TLV_DB_SCALE_ITEM(-5670, 0, 0),
82 14, 14, TLV_DB_SCALE_ITEM(-5420, 0, 0),
83 15, 17, TLV_DB_SCALE_ITEM(-5060, 250, 0),
84 18, 18, TLV_DB_SCALE_ITEM(-4370, 0, 0),
85 19, 19, TLV_DB_SCALE_ITEM(-4210, 0, 0),
86 20, 20, TLV_DB_SCALE_ITEM(-3960, 0, 0),
87 21, 21, TLV_DB_SCALE_ITEM(-3760, 0, 0),
88 22, 22, TLV_DB_SCALE_ITEM(-3600, 0, 0),
89 23, 23, TLV_DB_SCALE_ITEM(-3340, 0, 0),
90 24, 24, TLV_DB_SCALE_ITEM(-3150, 0, 0),
91 25, 25, TLV_DB_SCALE_ITEM(-2980, 0, 0),
92 26, 26, TLV_DB_SCALE_ITEM(-2720, 0, 0),
93 27, 27, TLV_DB_SCALE_ITEM(-2520, 0, 0),
94 28, 30, TLV_DB_SCALE_ITEM(-2350, 190, 0),
95 31, 31, TLV_DB_SCALE_ITEM(-1750, 0, 0),
96 32, 34, TLV_DB_SCALE_ITEM(-1640, 100, 0),
97 35, 37, TLV_DB_SCALE_ITEM(-1310, 110, 0),
98 38, 39, TLV_DB_SCALE_ITEM(-990, 100, 0),
99 40, 40, TLV_DB_SCALE_ITEM(-710, 0, 0),
100 41, 41, TLV_DB_SCALE_ITEM(-600, 0, 0),
101 42, 42, TLV_DB_SCALE_ITEM(-500, 0, 0),
102 43, 43, TLV_DB_SCALE_ITEM(-340, 0, 0),
103 44, 44, TLV_DB_SCALE_ITEM(-190, 0, 0),
104 45, 45, TLV_DB_SCALE_ITEM(-50, 0, 0),
105 46, 46, TLV_DB_SCALE_ITEM(50, 0, 0),
106 47, 50, TLV_DB_SCALE_ITEM(120, 40, 0),
107 51, 57, TLV_DB_SCALE_ITEM(290, 50, 0),
108 58, 58, TLV_DB_SCALE_ITEM(650, 0, 0),
109 59, 62, TLV_DB_SCALE_ITEM(700, 60, 0),
110 63, 63, TLV_DB_SCALE_ITEM(950, 0, 0),
111};
112
113static const struct snd_kcontrol_new max9768_volume[] = {
114 SOC_SINGLE_TLV("Playback Volume", MAX9768_VOL, 0, 63, 0, volume_tlv),
115};
116
117static const struct snd_kcontrol_new max9768_mute[] = {
Mark Brown69edea82012-01-30 21:51:45 +0000118 SOC_SINGLE_BOOL_EXT("Playback Switch", 0, max9768_get_gpio, max9768_set_gpio),
Wolfram Sang394d2bb2012-01-27 16:10:23 +0100119};
120
Mark Brown439fe8a2013-08-11 13:26:43 +0100121static const struct snd_soc_dapm_widget max9768_dapm_widgets[] = {
122SND_SOC_DAPM_INPUT("IN"),
123
124SND_SOC_DAPM_OUTPUT("OUT+"),
125SND_SOC_DAPM_OUTPUT("OUT-"),
126};
127
128static const struct snd_soc_dapm_route max9768_dapm_routes[] = {
129 { "OUT+", NULL, "IN" },
130 { "OUT-", NULL, "IN" },
131};
132
Wolfram Sang394d2bb2012-01-27 16:10:23 +0100133static int max9768_probe(struct snd_soc_codec *codec)
134{
135 struct max9768 *max9768 = snd_soc_codec_get_drvdata(codec);
136 int ret;
137
Wolfram Sang394d2bb2012-01-27 16:10:23 +0100138 if (max9768->flags & MAX9768_FLAG_CLASSIC_PWM) {
139 ret = snd_soc_write(codec, MAX9768_CTRL, MAX9768_CTRL_PWM);
140 if (ret)
141 return ret;
142 }
143
144 if (gpio_is_valid(max9768->mute_gpio)) {
Liam Girdwood14ac9112012-02-06 16:50:58 +0000145 ret = snd_soc_add_codec_controls(codec, max9768_mute,
Wolfram Sang394d2bb2012-01-27 16:10:23 +0100146 ARRAY_SIZE(max9768_mute));
147 if (ret)
148 return ret;
149 }
150
151 return 0;
152}
153
154static struct snd_soc_codec_driver max9768_codec_driver = {
155 .probe = max9768_probe,
156 .controls = max9768_volume,
157 .num_controls = ARRAY_SIZE(max9768_volume),
Mark Brown439fe8a2013-08-11 13:26:43 +0100158 .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),
Wolfram Sang394d2bb2012-01-27 16:10:23 +0100162};
163
Wolfram Sang394d2bb2012-01-27 16:10:23 +0100164static 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),
Wolfram Sang394d2bb2012-01-27 16:10:23 +0100170 .cache_type = REGCACHE_RBTREE,
171};
172
Bill Pemberton7a79e942012-12-07 09:26:37 -0500173static int max9768_i2c_probe(struct i2c_client *client,
174 const struct i2c_device_id *id)
Wolfram Sang394d2bb2012-01-27 16:10:23 +0100175{
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 */
186 err = gpio_request_one(pdata->mute_gpio, GPIOF_INIT_HIGH, "MAX9768 Mute");
187 max9768->mute_gpio = err ?: pdata->mute_gpio;
188
189 /* Activate chip by releasing shutdown, enables I2C */
190 err = gpio_request_one(pdata->shdn_gpio, GPIOF_INIT_HIGH, "MAX9768 Shutdown");
191 max9768->shdn_gpio = err ?: pdata->shdn_gpio;
192
193 max9768->flags = pdata->flags;
194 } else {
195 max9768->shdn_gpio = -EINVAL;
196 max9768->mute_gpio = -EINVAL;
197 }
198
199 i2c_set_clientdata(client, max9768);
200
Sachin Kamat8f255e72012-11-26 17:19:41 +0530201 max9768->regmap = devm_regmap_init_i2c(client, &max9768_i2c_regmap_config);
Wolfram Sang394d2bb2012-01-27 16:10:23 +0100202 if (IS_ERR(max9768->regmap)) {
203 err = PTR_ERR(max9768->regmap);
204 goto err_gpio_free;
205 }
206
207 err = snd_soc_register_codec(&client->dev, &max9768_codec_driver, NULL, 0);
208 if (err)
Sachin Kamat8f255e72012-11-26 17:19:41 +0530209 goto err_gpio_free;
Wolfram Sang394d2bb2012-01-27 16:10:23 +0100210
211 return 0;
212
Wolfram Sang394d2bb2012-01-27 16:10:23 +0100213 err_gpio_free:
214 if (gpio_is_valid(max9768->shdn_gpio))
215 gpio_free(max9768->shdn_gpio);
216 if (gpio_is_valid(max9768->mute_gpio))
217 gpio_free(max9768->mute_gpio);
218
219 return err;
220}
221
Bill Pemberton7a79e942012-12-07 09:26:37 -0500222static int max9768_i2c_remove(struct i2c_client *client)
Wolfram Sang394d2bb2012-01-27 16:10:23 +0100223{
224 struct max9768 *max9768 = i2c_get_clientdata(client);
225
226 snd_soc_unregister_codec(&client->dev);
Wolfram Sang394d2bb2012-01-27 16:10:23 +0100227
228 if (gpio_is_valid(max9768->shdn_gpio))
229 gpio_free(max9768->shdn_gpio);
230 if (gpio_is_valid(max9768->mute_gpio))
231 gpio_free(max9768->mute_gpio);
232
233 return 0;
234}
235
236static const struct i2c_device_id max9768_i2c_id[] = {
237 { "max9768", 0 },
238 { }
239};
240MODULE_DEVICE_TABLE(i2c, max9768_i2c_id);
241
242static struct i2c_driver max9768_i2c_driver = {
243 .driver = {
244 .name = "max9768",
245 .owner = THIS_MODULE,
246 },
247 .probe = max9768_i2c_probe,
Bill Pemberton7a79e942012-12-07 09:26:37 -0500248 .remove = max9768_i2c_remove,
Wolfram Sang394d2bb2012-01-27 16:10:23 +0100249 .id_table = max9768_i2c_id,
250};
251module_i2c_driver(max9768_i2c_driver);
252
253MODULE_AUTHOR("Wolfram Sang <w.sang@pengutronix.de>");
254MODULE_DESCRIPTION("ASoC MAX9768 amplifier driver");
255MODULE_LICENSE("GPL v2");