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 15typedef void (*notify_func_t)(void *data); 16 17enum notify_type { 18 AOA_NOTIFY_HEADPHONE, 19 AOA_NOTIFY_LINE_IN, 20 AOA_NOTIFY_LINE_OUT, 21}; 22 23struct gpio_runtime; 24struct 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 void (*set_master)(struct gpio_runtime *rt, int on); 38 39 int (*get_headphone)(struct gpio_runtime *rt); 40 int (*get_speakers)(struct gpio_runtime *rt); 41 int (*get_lineout)(struct gpio_runtime *rt); 42 int (*get_master)(struct gpio_runtime *rt); 43 44 void (*set_hw_reset)(struct gpio_runtime *rt, int on); 45 46 /* use this to be notified of any events. The notification 47 * function is passed the data, and is called in process 48 * context by the use of schedule_work. 49 * The interface for it is that setting a function to NULL 50 * removes it, and they return 0 if the operation succeeded, 51 * and -EBUSY if the notification is already assigned by 52 * someone else. */ 53 int (*set_notify)(struct gpio_runtime *rt, 54 enum notify_type type, 55 notify_func_t notify, 56 void *data); 57 /* returns 0 if not plugged in, 1 if plugged in 58 * or a negative error code */ 59 int (*get_detect)(struct gpio_runtime *rt, 60 enum notify_type type); 61}; 62 63struct gpio_notification { 64 struct delayed_work work; 65 notify_func_t notify; 66 void *data; 67 void *gpio_private; 68 struct mutex mutex; 69}; 70 71struct gpio_runtime { 72 /* to be assigned by fabric */ 73 struct device_node *node; 74 /* since everyone needs this pointer anyway... */ 75 struct gpio_methods *methods; 76 /* to be used by the gpio implementation */ 77 int implementation_private; 78 struct gpio_notification headphone_notify; 79 struct gpio_notification line_in_notify; 80 struct gpio_notification line_out_notify; 81}; 82 83#endif /* __AOA_GPIO_H */ 84