This source file includes following definitions.
- max9768_get_gpio
- max9768_set_gpio
- max9768_probe
- max9768_i2c_probe
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8 #include <linux/init.h>
9 #include <linux/module.h>
10 #include <linux/i2c.h>
11 #include <linux/slab.h>
12 #include <linux/gpio.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
21 #define MAX9768_VOL 0
22 #define MAX9768_CTRL 3
23
24
25 #define MAX9768_CTRL_PWM 0x15
26 #define MAX9768_CTRL_FILTERLESS 0x16
27
28 struct max9768 {
29 struct regmap *regmap;
30 int mute_gpio;
31 int shdn_gpio;
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 = gpio_get_value_cansleep(max9768->mute_gpio);
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 gpio_set_value_cansleep(max9768->mute_gpio, !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(component);
132 int ret;
133
134 if (max9768->flags & MAX9768_FLAG_CLASSIC_PWM) {
135 ret = regmap_write(max9768->regmap, MAX9768_CTRL,
136 MAX9768_CTRL_PWM);
137 if (ret)
138 return ret;
139 }
140
141 if (gpio_is_valid(max9768->mute_gpio)) {
142 ret = snd_soc_add_component_controls(component, 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 const struct i2c_device_id *id)
172 {
173 struct max9768 *max9768;
174 struct max9768_pdata *pdata = client->dev.platform_data;
175 int err;
176
177 max9768 = devm_kzalloc(&client->dev, sizeof(*max9768), GFP_KERNEL);
178 if (!max9768)
179 return -ENOMEM;
180
181 if (pdata) {
182
183 err = devm_gpio_request_one(&client->dev, pdata->mute_gpio,
184 GPIOF_INIT_HIGH, "MAX9768 Mute");
185 max9768->mute_gpio = err ?: pdata->mute_gpio;
186
187
188 err = devm_gpio_request_one(&client->dev, pdata->shdn_gpio,
189 GPIOF_INIT_HIGH, "MAX9768 Shutdown");
190 max9768->shdn_gpio = err ?: pdata->shdn_gpio;
191
192 max9768->flags = pdata->flags;
193 } else {
194 max9768->shdn_gpio = -EINVAL;
195 max9768->mute_gpio = -EINVAL;
196 }
197
198 i2c_set_clientdata(client, max9768);
199
200 max9768->regmap = devm_regmap_init_i2c(client, &max9768_i2c_regmap_config);
201 if (IS_ERR(max9768->regmap))
202 return PTR_ERR(max9768->regmap);
203
204 return devm_snd_soc_register_component(&client->dev,
205 &max9768_component_driver, NULL, 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 <w.sang@pengutronix.de>");
224 MODULE_DESCRIPTION("ASoC MAX9768 amplifier driver");
225 MODULE_LICENSE("GPL v2");