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/**
* dwc3_otg.h - DesignWare USB3 DRD Controller OTG
*
* Copyright (c) 2012, Code Aurora Forum. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 and
* only version 2 as published by the Free Software Foundation.
*
* 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_DWC3_OTG_H
#define __LINUX_USB_DWC3_OTG_H
#include <linux/workqueue.h>
#include <linux/usb/otg.h>
struct dwc3_charger;
/**
* struct dwc3_otg: OTG driver data. Shared by HCD and DCD.
* @otg: USB OTG Transceiver structure.
* @irq: IRQ number assigned for HSUSB controller.
* @regs: ioremapped register base address.
* @sm_work: OTG state machine work.
* @charger: DWC3 external charger detector
* @inputs: OTG state machine inputs
*/
struct dwc3_otg {
struct usb_otg otg;
int irq;
void __iomem *regs;
struct work_struct sm_work;
struct dwc3_charger *charger;
struct dwc3_ext_xceiv *ext_xceiv;
#define ID 0
#define B_SESS_VLD 1
unsigned long inputs;
};
/**
* USB charger types
*
* DWC3_INVALID_CHARGER Invalid USB charger.
* DWC3_SDP_CHARGER Standard downstream port. Refers to a downstream port
* on USB compliant host/hub.
* DWC3_DCP_CHARGER Dedicated charger port (AC charger/ Wall charger).
* DWC3_CDP_CHARGER Charging downstream port. Enumeration can happen and
* IDEV_CHG_MAX can be drawn irrespective of USB state.
*/
enum dwc3_chg_type {
DWC3_INVALID_CHARGER = 0,
DWC3_SDP_CHARGER,
DWC3_DCP_CHARGER,
DWC3_CDP_CHARGER,
};
struct dwc3_charger {
enum dwc3_chg_type chg_type;
/* start/stop charger detection, provided by external charger module */
void (*start_detection)(struct dwc3_charger *charger, bool start);
/* to notify OTG about charger detection completion, provided by OTG */
void (*notify_detection_complete)(struct usb_otg *otg,
struct dwc3_charger *charger);
};
/* for external charger driver */
extern int dwc3_set_charger(struct usb_otg *otg, struct dwc3_charger *charger);
enum dwc3_ext_events {
DWC3_EVENT_NONE = 0, /* no change event */
DWC3_EVENT_PHY_RESUME, /* PHY has come out of LPM */
DWC3_EVENT_XCEIV_STATE, /* XCEIV state (id/bsv) has changed */
};
enum dwc3_id_state {
DWC3_ID_GROUND = 0,
DWC3_ID_FLOAT,
};
/* external transceiver that can perform connect/disconnect monitoring in LPM */
struct dwc3_ext_xceiv {
enum dwc3_id_state id;
bool bsv;
/* to notify OTG about LPM exit event, provided by OTG */
void (*notify_ext_events)(struct usb_otg *otg,
enum dwc3_ext_events ext_event);
};
/* for external transceiver driver */
extern int dwc3_set_ext_xceiv(struct usb_otg *otg,
struct dwc3_ext_xceiv *ext_xceiv);
#endif /* __LINUX_USB_DWC3_OTG_H */