/* SPDX-License-Identifier: GPL-2.0-only */ /* * Apple Onboard Audio GPIO definitions * * Copyright 2006 Johannes Berg <johannes@sipsolutions.net> */ #ifndef __AOA_GPIO_H #define __AOA_GPIO_H #include <linux/workqueue.h> #include <linux/mutex.h> typedef void (*notify_func_t)(void *data); enum notify_type { AOA_NOTIFY_HEADPHONE, AOA_NOTIFY_LINE_IN, AOA_NOTIFY_LINE_OUT, }; struct gpio_runtime; struct gpio_methods { /* for initialisation/de-initialisation of the GPIO layer */ void (*init)(struct gpio_runtime *rt); void (*exit)(struct gpio_runtime *rt); /* turn off headphone, speakers, lineout */ void (*all_amps_off)(struct gpio_runtime *rt); /* turn headphone, speakers, lineout back to previous setting */ void (*all_amps_restore)(struct gpio_runtime *rt); void (*set_headphone)(struct gpio_runtime *rt, int on); void (*set_speakers)(struct gpio_runtime *rt, int on); void (*set_lineout)(struct gpio_runtime *rt, int on); void (*set_master)(struct gpio_runtime *rt, int on); int (*get_headphone)(struct gpio_runtime *rt); int (*get_speakers)(struct gpio_runtime *rt); int (*get_lineout)(struct gpio_runtime *rt); int (*get_master)(struct gpio_runtime *rt); void (*set_hw_reset)(struct gpio_runtime *rt, int on); /* use this to be notified of any events. The notification * function is passed the data, and is called in process * context by the use of schedule_work. * The interface for it is that setting a function to NULL * removes it, and they return 0 if the operation succeeded, * and -EBUSY if the notification is already assigned by * someone else. */ int (*set_notify)(struct gpio_runtime *rt, enum notify_type type, notify_func_t notify, void *data); /* returns 0 if not plugged in, 1 if plugged in * or a negative error code */ int (*get_detect)(struct gpio_runtime *rt, enum notify_type type); }; struct gpio_notification { struct delayed_work work; notify_func_t notify; void *data; void *gpio_private; struct mutex mutex; }; struct gpio_runtime { /* to be assigned by fabric */ struct device_node *node; /* since everyone needs this pointer anyway... */ struct gpio_methods *methods; /* to be used by the gpio implementation */ int implementation_private; struct gpio_notification headphone_notify; struct gpio_notification line_in_notify; struct gpio_notification line_out_notify; }; #endif /* __AOA_GPIO_H */