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