| 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 | 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 | |
| 63 | struct 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 | |
| 71 | struct 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 */ |