aoa-gpio.h
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/*
* Apple Onboard Audio GPIO definitions
*
* Copyright 2006 Johannes Berg <johannes@sipsolutions.net>
*
* GPL v2, can be found in COPYING.
*/
#ifndef __AOA_GPIO_H
#define __AOA_GPIO_H
#include <linux/workqueue.h>
#include <linux/mutex.h>
#include <asm/prom.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 */