include/sound/soc-jack.h

   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  * @gpio:         legacy gpio number
  48  * @idx:          gpio descriptor index within the function of the GPIO
  49  *                consumer device
  50  * @gpiod_dev:    GPIO consumer device
  51  * @name:         gpio name. Also as connection ID for the GPIO consumer
  52  *                device function name lookup
  53  * @report:       value to report when jack detected
  54  * @invert:       report presence in low state
  55  * @debounce_time: debounce time in ms
  56  * @wake:         enable as wake source
  57  * @jack_status_check: callback function which overrides the detection
  58  *                     to provide more complex checks (eg, reading an
  59  *                     ADC).
  60  */
  61 struct snd_soc_jack_gpio {
  62         unsigned int gpio;
  63         unsigned int idx;
  64         struct device *gpiod_dev;
  65         const char *name;
  66         int report;
  67         int invert;
  68         int debounce_time;
  69         bool wake;
  70
  71         /* private: */
  72         struct snd_soc_jack *jack;
  73         struct delayed_work work;
  74         struct notifier_block pm_notifier;
  75         struct gpio_desc *desc;
  76
  77         void *data;
  78         /* public: */
  79         int (*jack_status_check)(void *data);
  80 };
  81
  82 struct snd_soc_jack {
  83         struct mutex mutex;
  84         struct snd_jack *jack;
  85         struct snd_soc_card *card;
  86         struct list_head pins;
  87         int status;
  88         struct blocking_notifier_head notifier;
  89         struct list_head jack_zones;
  90 };
  91
  92 /* Jack reporting */
  93 void snd_soc_jack_report(struct snd_soc_jack *jack, int status, int mask);
  94 int snd_soc_jack_add_pins(struct snd_soc_jack *jack, int count,
  95                           struct snd_soc_jack_pin *pins);
  96 void snd_soc_jack_notifier_register(struct snd_soc_jack *jack,
  97                                     struct notifier_block *nb);
  98 void snd_soc_jack_notifier_unregister(struct snd_soc_jack *jack,
  99                                       struct notifier_block *nb);
 100 int snd_soc_jack_add_zones(struct snd_soc_jack *jack, int count,
 101                            struct snd_soc_jack_zone *zones);
 102 int snd_soc_jack_get_type(struct snd_soc_jack *jack, int micbias_voltage);
 103 #ifdef CONFIG_GPIOLIB
 104 int snd_soc_jack_add_gpios(struct snd_soc_jack *jack, int count,
 105                            struct snd_soc_jack_gpio *gpios);
 106 int snd_soc_jack_add_gpiods(struct device *gpiod_dev,
 107                             struct snd_soc_jack *jack,
 108                             int count, struct snd_soc_jack_gpio *gpios);
 109 void snd_soc_jack_free_gpios(struct snd_soc_jack *jack, int count,
 110                              struct snd_soc_jack_gpio *gpios);
 111 #else
 112 static inline int snd_soc_jack_add_gpios(struct snd_soc_jack *jack, int count,
 113                                          struct snd_soc_jack_gpio *gpios)
 114 {
 115         return 0;
 116 }
 117
 118 static inline int snd_soc_jack_add_gpiods(struct device *gpiod_dev,
 119                                           struct snd_soc_jack *jack,
 120                                           int count,
 121                                           struct snd_soc_jack_gpio *gpios)
 122 {
 123         return 0;
 124 }
 125
 126 static inline void snd_soc_jack_free_gpios(struct snd_soc_jack *jack, int count,
 127                                            struct snd_soc_jack_gpio *gpios)
 128 {
 129 }
 130 #endif
 131
 132 #endif /* __SOC_JACK_H */