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/*
* Copyright (C) 2011 Google, Inc.
*
* Author:
* Colin Cross <ccross@android.com>
*
* This software is licensed under the terms of the GNU General Public
* License version 2, as published by the Free Software Foundation, and
* may be copied, distributed, and modified under those terms.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
*/
#ifndef __LINUX_USB_OTG_ID_H
#define __LINUX_USB_OTG_ID_H
#include <linux/notifier.h>
#include <linux/plist.h>
/**
* otg_id_notifier_block
*
* @priority: Order the notifications will be called in. Higher numbers
* get called first.
* @detect: Called during otg_id_notify. Return OTG_ID_HANDLED if the USB cable
* has been identified
* @proxy_wait: Called during otg_id_notify if a previous handler returns
* OTG_ID_PROXY_WAIT. This should wait on ID change then call otg_id_notify.
* This is used when a handler knows what's connected but can't detect
* the change itself.
* @cancel: Called after detect has returned OTG_ID_HANDLED to ask it to
* release detection resources to allow a new identification to occur.
*/
struct otg_id_notifier_block {
int priority;
int (*detect)(struct otg_id_notifier_block *otg_id_nb);
int (*proxy_wait)(struct otg_id_notifier_block *otg_id_nb);
void (*cancel)(struct otg_id_notifier_block *otg_id_nb);
struct plist_node p;
};
#define OTG_ID_PROXY_WAIT 2
#define OTG_ID_HANDLED 1
#define OTG_ID_UNHANDLED 0
int otg_id_register_notifier(struct otg_id_notifier_block *otg_id_nb);
void otg_id_unregister_notifier(struct otg_id_notifier_block *otg_id_nb);
void otg_id_notify(void);
int otg_id_suspend(void);
void otg_id_resume(void);
#endif /* __LINUX_USB_OTG_ID_H */
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