1 // SPDX-License-Identifier: GPL-2.0-only 1 // SPDX-License-Identifier: GPL-2.0-only
2 /* 2 /*
3 * Copyright (c) 2020 Bootlin SA 3 * Copyright (c) 2020 Bootlin SA
4 * Author: Alexandre Belloni <alexandre.bellon 4 * Author: Alexandre Belloni <alexandre.belloni@bootlin.com>
5 */ 5 */
6 6
7 #include <linux/gpio/consumer.h> 7 #include <linux/gpio/consumer.h>
8 #include <linux/module.h> 8 #include <linux/module.h>
9 #include <linux/regulator/consumer.h> 9 #include <linux/regulator/consumer.h>
10 #include <sound/soc.h> 10 #include <sound/soc.h>
11 11
12 #define MUX_TEXT_SIZE 2 <<
13 #define MUX_WIDGET_SIZE 4 <<
14 #define MUX_ROUTE_SIZE 3 <<
15 struct simple_mux { 12 struct simple_mux {
16 struct gpio_desc *gpiod_mux; 13 struct gpio_desc *gpiod_mux;
17 unsigned int mux; 14 unsigned int mux;
18 const char *mux_texts[MUX_TEXT_SIZE]; <<
19 struct soc_enum mux_enum; <<
20 struct snd_kcontrol_new mux_mux; <<
21 struct snd_soc_dapm_widget mux_widgets <<
22 struct snd_soc_dapm_route mux_routes[M <<
23 struct snd_soc_component_driver mux_dr <<
24 }; 15 };
25 16
26 static const char * const simple_mux_texts[MUX !! 17 static const char * const simple_mux_texts[] = {
27 "Input 1", "Input 2" 18 "Input 1", "Input 2"
28 }; 19 };
29 20
30 static SOC_ENUM_SINGLE_EXT_DECL(simple_mux_enu 21 static SOC_ENUM_SINGLE_EXT_DECL(simple_mux_enum, simple_mux_texts);
31 22
32 static int simple_mux_control_get(struct snd_k 23 static int simple_mux_control_get(struct snd_kcontrol *kcontrol,
33 struct snd_c 24 struct snd_ctl_elem_value *ucontrol)
34 { 25 {
35 struct snd_soc_dapm_context *dapm = sn 26 struct snd_soc_dapm_context *dapm = snd_soc_dapm_kcontrol_dapm(kcontrol);
36 struct snd_soc_component *c = snd_soc_ 27 struct snd_soc_component *c = snd_soc_dapm_to_component(dapm);
37 struct simple_mux *priv = snd_soc_comp 28 struct simple_mux *priv = snd_soc_component_get_drvdata(c);
38 29
39 ucontrol->value.enumerated.item[0] = p 30 ucontrol->value.enumerated.item[0] = priv->mux;
40 31
41 return 0; 32 return 0;
42 } 33 }
43 34
44 static int simple_mux_control_put(struct snd_k 35 static int simple_mux_control_put(struct snd_kcontrol *kcontrol,
45 struct snd_c 36 struct snd_ctl_elem_value *ucontrol)
46 { 37 {
47 struct snd_soc_dapm_context *dapm = sn 38 struct snd_soc_dapm_context *dapm = snd_soc_dapm_kcontrol_dapm(kcontrol);
48 struct soc_enum *e = (struct soc_enum 39 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
49 struct snd_soc_component *c = snd_soc_ 40 struct snd_soc_component *c = snd_soc_dapm_to_component(dapm);
50 struct simple_mux *priv = snd_soc_comp 41 struct simple_mux *priv = snd_soc_component_get_drvdata(c);
51 42
52 if (ucontrol->value.enumerated.item[0] 43 if (ucontrol->value.enumerated.item[0] > e->items)
53 return -EINVAL; 44 return -EINVAL;
54 45
55 if (priv->mux == ucontrol->value.enume 46 if (priv->mux == ucontrol->value.enumerated.item[0])
56 return 0; 47 return 0;
57 48
58 priv->mux = ucontrol->value.enumerated 49 priv->mux = ucontrol->value.enumerated.item[0];
59 50
60 gpiod_set_value_cansleep(priv->gpiod_m 51 gpiod_set_value_cansleep(priv->gpiod_mux, priv->mux);
61 52
62 return snd_soc_dapm_mux_update_power(d 53 return snd_soc_dapm_mux_update_power(dapm, kcontrol,
63 u 54 ucontrol->value.enumerated.item[0],
64 e 55 e, NULL);
65 } 56 }
66 57
67 static unsigned int simple_mux_read(struct snd 58 static unsigned int simple_mux_read(struct snd_soc_component *component,
68 unsigned i 59 unsigned int reg)
69 { 60 {
70 struct simple_mux *priv = snd_soc_comp 61 struct simple_mux *priv = snd_soc_component_get_drvdata(component);
71 62
72 return priv->mux; 63 return priv->mux;
73 } 64 }
74 65
75 static const struct snd_kcontrol_new simple_mu 66 static const struct snd_kcontrol_new simple_mux_mux =
76 SOC_DAPM_ENUM_EXT("Muxer", simple_mux_ 67 SOC_DAPM_ENUM_EXT("Muxer", simple_mux_enum, simple_mux_control_get, simple_mux_control_put);
77 68
78 static const struct snd_soc_dapm_widget simple !! 69 static const struct snd_soc_dapm_widget simple_mux_dapm_widgets[] = {
79 SND_SOC_DAPM_INPUT("IN1"), 70 SND_SOC_DAPM_INPUT("IN1"),
80 SND_SOC_DAPM_INPUT("IN2"), 71 SND_SOC_DAPM_INPUT("IN2"),
81 SND_SOC_DAPM_MUX("MUX", SND_SOC_NOPM, !! 72 SND_SOC_DAPM_MUX("MUX", SND_SOC_NOPM, 0, 0, &simple_mux_mux),
82 SND_SOC_DAPM_OUTPUT("OUT"), 73 SND_SOC_DAPM_OUTPUT("OUT"),
83 }; 74 };
84 75
85 static const struct snd_soc_dapm_route simple_ !! 76 static const struct snd_soc_dapm_route simple_mux_dapm_routes[] = {
86 { "OUT", NULL, "MUX" }, 77 { "OUT", NULL, "MUX" },
87 { "MUX", "Input 1", "IN1" }, // see si !! 78 { "MUX", "Input 1", "IN1" },
88 { "MUX", "Input 2", "IN2" }, // see si !! 79 { "MUX", "Input 2", "IN2" },
>> 80 };
>> 81
>> 82 static const struct snd_soc_component_driver simple_mux_component_driver = {
>> 83 .dapm_widgets = simple_mux_dapm_widgets,
>> 84 .num_dapm_widgets = ARRAY_SIZE(simple_mux_dapm_widgets),
>> 85 .dapm_routes = simple_mux_dapm_routes,
>> 86 .num_dapm_routes = ARRAY_SIZE(simple_mux_dapm_routes),
>> 87 .read = simple_mux_read,
89 }; 88 };
90 89
91 static int simple_mux_probe(struct platform_de 90 static int simple_mux_probe(struct platform_device *pdev)
92 { 91 {
93 struct device *dev = &pdev->dev; 92 struct device *dev = &pdev->dev;
94 struct device_node *np = dev->of_node; <<
95 struct simple_mux *priv; 93 struct simple_mux *priv;
96 94
97 priv = devm_kzalloc(dev, sizeof(*priv) 95 priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
98 if (!priv) 96 if (!priv)
99 return -ENOMEM; 97 return -ENOMEM;
100 98
101 dev_set_drvdata(dev, priv); 99 dev_set_drvdata(dev, priv);
102 100
103 priv->gpiod_mux = devm_gpiod_get(dev, 101 priv->gpiod_mux = devm_gpiod_get(dev, "mux", GPIOD_OUT_LOW);
104 if (IS_ERR(priv->gpiod_mux)) 102 if (IS_ERR(priv->gpiod_mux))
105 return dev_err_probe(dev, PTR_ 103 return dev_err_probe(dev, PTR_ERR(priv->gpiod_mux),
106 "Failed t 104 "Failed to get 'mux' gpio");
107 105
108 /* Copy default settings */ !! 106 return devm_snd_soc_register_component(dev, &simple_mux_component_driver, NULL, 0);
109 memcpy(&priv->mux_texts, &simpl <<
110 memcpy(&priv->mux_enum, &simpl <<
111 memcpy(&priv->mux_mux, &simpl <<
112 memcpy(&priv->mux_widgets, &simpl <<
113 memcpy(&priv->mux_routes, &simpl <<
114 <<
115 priv->mux_driver.dapm_widgets <<
116 priv->mux_driver.num_dapm_widgets <<
117 priv->mux_driver.dapm_routes <<
118 priv->mux_driver.num_dapm_routes <<
119 priv->mux_driver.read <<
120 <<
121 /* Overwrite text ("Input 1", "Input 2 <<
122 of_property_read_string_array(np, "sta <<
123 <<
124 /* switch to use priv data instead of <<
125 priv->mux_enum.texts <<
126 priv->mux_mux.private_value <<
127 priv->mux_widgets[2].kcontrol_news <<
128 priv->mux_routes[1].control <<
129 priv->mux_routes[2].control <<
130 <<
131 return devm_snd_soc_register_component <<
132 } 107 }
133 108
134 #ifdef CONFIG_OF 109 #ifdef CONFIG_OF
135 static const struct of_device_id simple_mux_id 110 static const struct of_device_id simple_mux_ids[] = {
136 { .compatible = "simple-audio-mux", }, 111 { .compatible = "simple-audio-mux", },
137 { } 112 { }
138 }; 113 };
139 MODULE_DEVICE_TABLE(of, simple_mux_ids); 114 MODULE_DEVICE_TABLE(of, simple_mux_ids);
140 #endif 115 #endif
141 116
142 static struct platform_driver simple_mux_drive 117 static struct platform_driver simple_mux_driver = {
143 .driver = { 118 .driver = {
144 .name = "simple-mux", 119 .name = "simple-mux",
145 .of_match_table = of_match_ptr 120 .of_match_table = of_match_ptr(simple_mux_ids),
146 }, 121 },
147 .probe = simple_mux_probe, 122 .probe = simple_mux_probe,
148 }; 123 };
149 124
150 module_platform_driver(simple_mux_driver); 125 module_platform_driver(simple_mux_driver);
151 126
152 MODULE_DESCRIPTION("ASoC Simple Audio Mux driv 127 MODULE_DESCRIPTION("ASoC Simple Audio Mux driver");
153 MODULE_AUTHOR("Alexandre Belloni <alexandre.be 128 MODULE_AUTHOR("Alexandre Belloni <alexandre.belloni@bootlin.com>");
154 MODULE_LICENSE("GPL"); 129 MODULE_LICENSE("GPL");
155 130
Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.