83 lines
2.4 KiB
C
83 lines
2.4 KiB
C
/* 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 <johannes@sipsolutions.net>
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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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