76 lines
2.2 KiB
C
76 lines
2.2 KiB
C
/*
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* include/linux/vbus_notifier.h
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*
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* header file supporting VBUS notifier call chain information
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*
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* Copyright (C) 2010 Samsung Electronics
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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*/
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#ifndef __VBUS_NOTIFIER_H__
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#define __VBUS_NOTIFIER_H__
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/* VBUS notifier call chain command */
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typedef enum {
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VBUS_NOTIFY_CMD_NONE = 0,
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VBUS_NOTIFY_CMD_FALLING,
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VBUS_NOTIFY_CMD_RISING,
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} vbus_notifier_cmd_t;
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/* VBUS notifier call sequence,
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* largest priority number device will be called first. */
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typedef enum {
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VBUS_NOTIFY_DEV_USB,
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VBUS_NOTIFY_DEV_CHARGER,
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} vbus_notifier_device_t;
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typedef enum {
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STATUS_VBUS_UNKNOWN = 0,
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STATUS_VBUS_LOW,
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STATUS_VBUS_HIGH,
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} vbus_status_t;
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typedef enum {
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VBUS_NOTIFIER_NOT_READY = 0,
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VBUS_NOTIFIER_NOT_READY_DETECT,
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VBUS_NOTIFIER_READY,
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} vbus_notifier_stat_t;
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struct vbus_notifier_struct {
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struct mutex vbus_mutex;
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vbus_notifier_stat_t status;
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vbus_status_t vbus_type;
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vbus_notifier_cmd_t cmd;
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struct blocking_notifier_head notifier_call_chain;
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};
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#define VBUS_NOTIFIER_BLOCK(name) \
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struct notifier_block (name)
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/* vbus notifier init/notify function
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* this function is for JUST VBUS device driver.
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* DON'T use function anywhrer else!!
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*/
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extern void vbus_notifier_handle(vbus_status_t new_dev);
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/* vbus notifier register/unregister API
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* for used any where want to receive vbus attached device attach/detach. */
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extern int vbus_notifier_register(struct notifier_block *nb,
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notifier_fn_t notifier, vbus_notifier_device_t listener);
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extern int vbus_notifier_unregister(struct notifier_block *nb);
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#endif /* __VBUS_NOTIFIER_H__ */
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