1 /* SPDX-License-Identifier: GPL-2.0
2 *
3 * soc-jack.h
4 *
5 * Copyright (C) 2019 Renesas Electronics Corp.
6 * Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
7 */
8 #ifndef __SOC_JACK_H
9 #define __SOC_JACK_H
10
11 /**
12 * struct snd_soc_jack_pin - Describes a pin to update based on jack detection
13 *
14 * @pin: name of the pin to update
15 * @mask: bits to check for in reported jack status
16 * @invert: if non-zero then pin is enabled when status is not reported
17 * @list: internal list entry
18 */
19 struct snd_soc_jack_pin {
20 struct list_head list;
21 const char *pin;
22 int mask;
23 bool invert;
24 };
25
26 /**
27 * struct snd_soc_jack_zone - Describes voltage zones of jack detection
28 *
29 * @min_mv: start voltage in mv
30 * @max_mv: end voltage in mv
31 * @jack_type: type of jack that is expected for this voltage
32 * @debounce_time: debounce_time for jack, codec driver should wait for this
33 * duration before reading the adc for voltages
34 * @list: internal list entry
35 */
36 struct snd_soc_jack_zone {
37 unsigned int min_mv;
38 unsigned int max_mv;
39 unsigned int jack_type;
40 unsigned int debounce_time;
41 struct list_head list;
42 };
43
44 /**
45 * struct snd_soc_jack_gpio - Describes a gpio pin for jack detection
46 *
47 * @idx: gpio descriptor index within the function of the GPIO
48 * consumer device
49 * @gpiod_dev: GPIO consumer device
50 * @name: gpio name. Also as connection ID for the GPIO consumer
51 * device function name lookup
52 * @report: value to report when jack detected
53 * @invert: report presence in low state
54 * @debounce_time: debounce time in ms
55 * @wake: enable as wake source
56 * @jack_status_check: callback function which overrides the detection
57 * to provide more complex checks (eg, reading an
58 * ADC).
59 */
60 struct snd_soc_jack_gpio {
61 unsigned int idx;
62 struct device *gpiod_dev;
63 const char *name;
64 int report;
65 int invert;
66 int debounce_time;
67 bool wake;
68
69 /* private: */
70 struct snd_soc_jack *jack;
71 struct delayed_work work;
72 struct notifier_block pm_notifier;
73 struct gpio_desc *desc;
74
75 void *data;
76 /* public: */
77 int (*jack_status_check)(void *data);
78 };
79
80 struct snd_soc_jack {
81 struct mutex mutex;
82 struct snd_jack *jack;
83 struct snd_soc_card *card;
84 struct list_head pins;
85 int status;
86 struct blocking_notifier_head notifier;
87 struct list_head jack_zones;
88 };
89
90 /* Jack reporting */
91 void snd_soc_jack_report(struct snd_soc_jack *jack, int status, int mask);
92 int snd_soc_jack_add_pins(struct snd_soc_jack *jack, int count,
93 struct snd_soc_jack_pin *pins);
94 void snd_soc_jack_notifier_register(struct snd_soc_jack *jack,
95 struct notifier_block *nb);
96 void snd_soc_jack_notifier_unregister(struct snd_soc_jack *jack,
97 struct notifier_block *nb);
98 int snd_soc_jack_add_zones(struct snd_soc_jack *jack, int count,
99 struct snd_soc_jack_zone *zones);
100 int snd_soc_jack_get_type(struct snd_soc_jack *jack, int micbias_voltage);
101 #ifdef CONFIG_GPIOLIB
102 int snd_soc_jack_add_gpios(struct snd_soc_jack *jack, int count,
103 struct snd_soc_jack_gpio *gpios);
104 int snd_soc_jack_add_gpiods(struct device *gpiod_dev,
105 struct snd_soc_jack *jack,
106 int count, struct snd_soc_jack_gpio *gpios);
107 void snd_soc_jack_free_gpios(struct snd_soc_jack *jack, int count,
108 struct snd_soc_jack_gpio *gpios);
109 #else
110 static inline int snd_soc_jack_add_gpios(struct snd_soc_jack *jack, int count,
111 struct snd_soc_jack_gpio *gpios)
112 {
113 return 0;
114 }
115
116 static inline int snd_soc_jack_add_gpiods(struct device *gpiod_dev,
117 struct snd_soc_jack *jack,
118 int count,
119 struct snd_soc_jack_gpio *gpios)
120 {
121 return 0;
122 }
123
124 static inline void snd_soc_jack_free_gpios(struct snd_soc_jack *jack, int count,
125 struct snd_soc_jack_gpio *gpios)
126 {
127 }
128 #endif
129
130 #endif /* __SOC_JACK_H */
131
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