include/linux/external_notify.h

/* SPDX-License-Identifier: GPL-2.0 */
/*
 * include/linux/external_notify.h
 *
 * header file supporting usb notify layer
 * external notify call chain information
 *
 * Copyright (C) 2016-2020 Samsung Electronics
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * 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.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
 *
 */

  /* usb notify layer v3.5 */

#ifndef __EXTERNAL_NOTIFY_H__
#define __EXTERNAL_NOTIFY_H__

#include <linux/notifier.h>

/* external notifier call chain command */
enum external_notify_cmd {
	EXTERNAL_NOTIFY_3S_NODEVICE = 1,
	EXTERNAL_NOTIFY_DEVICE_CONNECT,
	EXTERNAL_NOTIFY_HOSTBLOCK_PRE,
	EXTERNAL_NOTIFY_HOSTBLOCK_POST,
	EXTERNAL_NOTIFY_MDMBLOCK_PRE,
	EXTERNAL_NOTIFY_MDMBLOCK_POST,
	EXTERNAL_NOTIFY_POWERROLE,
	EXTERNAL_NOTIFY_DEVICEADD,
	EXTERNAL_NOTIFY_HOSTBLOCK_EARLY,
	EXTERNAL_NOTIFY_VBUS_RESET,
	EXTERNAL_NOTIFY_POSSIBLE_USB,
};

/* external notifier call sequence,
 * largest priority number device will be called first.
 */
enum external_notify_device {
	EXTERNAL_NOTIFY_DEV_MUIC,
	EXTERNAL_NOTIFY_DEV_CHARGER,
	EXTERNAL_NOTIFY_DEV_PDIC,
	EXTERNAL_NOTIFY_DEV_MANAGER,
};

enum external_notify_condev {
	EXTERNAL_NOTIFY_NONE = 0,
	EXTERNAL_NOTIFY_GPAD,
	EXTERNAL_NOTIFY_LANHUB,
};

#ifdef CONFIG_USB_EXTERNAL_NOTIFY
extern int send_external_notify(unsigned long cmd, int data);
extern int usb_external_notify_register(struct notifier_block *nb,
		notifier_fn_t notifier, int listener);
extern int usb_external_notify_unregister(struct notifier_block *nb);
extern void external_notifier_init(void);
#else
static inline int send_external_notify(unsigned long cmd,
			int data) {return 0; }
static inline int usb_external_notify_register(struct notifier_block *nb,
			notifier_fn_t notifier, int listener) {return 0; }
static inline int usb_external_notify_unregister(struct notifier_block *nb)
			{return 0; }
static inline void external_notifier_init(void) {}
#endif

#endif /* __EXTERNAL_NOTIFY_H__ */