[mirror_ubuntu-artful-kernel.git] / sound / aoa / aoa-gpio.h

/*
 * 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);

	int (*get_headphone)(struct gpio_runtime *rt);
	int (*get_speakers)(struct gpio_runtime *rt);
	int (*get_lineout)(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 {
	notify_func_t notify;
	void *data;
	void *gpio_private;
	struct work_struct work;
	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 */
Commit	Line	Data
f3d9478b JB	1	/*
	2	* Apple Onboard Audio GPIO definitions
	3	*
	4	* Copyright 2006 Johannes Berg <johannes@sipsolutions.net>
	5	*
	6	* GPL v2, can be found in COPYING.
	7	*/
	8
	9	#ifndef __AOA_GPIO_H
	10	#define __AOA_GPIO_H
	11	#include <linux/workqueue.h>
	12	#include <linux/mutex.h>
	13	#include <asm/prom.h>
	14
	15	typedef void (notify_func_t)(void data);
	16
	17	enum notify_type {
	18	AOA_NOTIFY_HEADPHONE,
	19	AOA_NOTIFY_LINE_IN,
	20	AOA_NOTIFY_LINE_OUT,
	21	};
	22
	23	struct gpio_runtime;
	24	struct gpio_methods {
	25	/* for initialisation/de-initialisation of the GPIO layer */
	26	void (init)(struct gpio_runtime rt);
	27	void (exit)(struct gpio_runtime rt);
	28
	29	/* turn off headphone, speakers, lineout */
	30	void (all_amps_off)(struct gpio_runtime rt);
	31	/* turn headphone, speakers, lineout back to previous setting */
	32	void (all_amps_restore)(struct gpio_runtime rt);
	33
	34	void (set_headphone)(struct gpio_runtime rt, int on);
	35	void (set_speakers)(struct gpio_runtime rt, int on);
	36	void (set_lineout)(struct gpio_runtime rt, int on);
	37
	38	int (get_headphone)(struct gpio_runtime rt);
	39	int (get_speakers)(struct gpio_runtime rt);
	40	int (get_lineout)(struct gpio_runtime rt);
	41
	42	void (set_hw_reset)(struct gpio_runtime rt, int on);
	43
	44	/* use this to be notified of any events. The notification
	45	* function is passed the data, and is called in process
	46	* context by the use of schedule_work.
	47	* The interface for it is that setting a function to NULL
	48	* removes it, and they return 0 if the operation succeeded,
	49	* and -EBUSY if the notification is already assigned by
	50	* someone else. */
	51	int (set_notify)(struct gpio_runtime rt,
	52	enum notify_type type,
	53	notify_func_t notify,
	54	void *data);
	55	/* returns 0 if not plugged in, 1 if plugged in
	56	* or a negative error code */
	57	int (get_detect)(struct gpio_runtime rt,
	58	enum notify_type type);
	59	};
	60
	61	struct gpio_notification {
	62	notify_func_t notify;
	63	void *data;
	64	void *gpio_private;
65	struct work_struct work;
66	struct mutex mutex;
67	};
68
69	struct gpio_runtime {
70	/* to be assigned by fabric */
71	struct device_node *node;
72	/* since everyone needs this pointer anyway... */
73	struct gpio_methods *methods;
74	/* to be used by the gpio implementation */
75	int implementation_private;
76	struct gpio_notification headphone_notify;
77	struct gpio_notification line_in_notify;
78	struct gpio_notification line_out_notify;
79	};
80
81	#endif /* __AOA_GPIO_H */