122 lines
3.5 KiB
C
122 lines
3.5 KiB
C
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/**
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* dwc3_otg.h - DesignWare USB3 DRD Controller OTG
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*
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* Copyright (c) 2012-2013, The Linux Foundation. All rights reserved.
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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 version 2 and
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* only version 2 as published by the Free Software Foundation.
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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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#ifndef __LINUX_USB_DWC3_OTG_H
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#define __LINUX_USB_DWC3_OTG_H
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#include <linux/workqueue.h>
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#include <linux/power_supply.h>
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#include <linux/usb/otg.h>
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#include "power.h"
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#define DWC3_IDEV_CHG_MAX 1500
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struct dwc3_charger;
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/**
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* struct dwc3_otg: OTG driver data. Shared by HCD and DCD.
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* @otg: USB OTG Transceiver structure.
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* @irq: IRQ number assigned for HSUSB controller.
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* @regs: ioremapped register base address.
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* @sm_work: OTG state machine work.
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* @charger: DWC3 external charger detector
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* @inputs: OTG state machine inputs
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*/
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struct dwc3_otg {
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struct usb_otg otg;
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int irq;
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struct dwc3 *dwc;
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void __iomem *regs;
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struct regulator *vbus_otg;
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struct work_struct sm_work;
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struct dwc3_charger *charger;
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struct dwc3_ext_xceiv *ext_xceiv;
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#define ID 0
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#define B_SESS_VLD 1
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unsigned long inputs;
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struct power_supply *psy;
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struct completion dwc3_xcvr_vbus_init;
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int host_bus_suspend;
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};
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/**
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* USB charger types
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*
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* DWC3_INVALID_CHARGER Invalid USB charger.
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* DWC3_SDP_CHARGER Standard downstream port. Refers to a downstream port
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* on USB compliant host/hub.
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* DWC3_DCP_CHARGER Dedicated charger port (AC charger/ Wall charger).
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* DWC3_CDP_CHARGER Charging downstream port. Enumeration can happen and
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* IDEV_CHG_MAX can be drawn irrespective of USB state.
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* DWC3_PROPRIETARY_CHARGER A proprietary charger pull DP and DM to specific
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* voltages between 2.0-3.3v for identification.
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*/
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enum dwc3_chg_type {
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DWC3_INVALID_CHARGER = 0,
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DWC3_SDP_CHARGER,
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DWC3_DCP_CHARGER,
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DWC3_CDP_CHARGER,
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DWC3_PROPRIETARY_CHARGER,
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};
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struct dwc3_charger {
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enum dwc3_chg_type chg_type;
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unsigned max_power;
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bool charging_disabled;
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bool skip_chg_detect;
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/* start/stop charger detection, provided by external charger module */
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void (*start_detection)(struct dwc3_charger *charger, bool start);
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/* to notify OTG about charger detection completion, provided by OTG */
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void (*notify_detection_complete)(struct usb_otg *otg,
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struct dwc3_charger *charger);
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};
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/* for external charger driver */
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extern int dwc3_set_charger(struct usb_otg *otg, struct dwc3_charger *charger);
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enum dwc3_ext_events {
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DWC3_EVENT_NONE = 0, /* no change event */
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DWC3_EVENT_PHY_RESUME, /* PHY has come out of LPM */
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DWC3_EVENT_XCEIV_STATE, /* XCEIV state (id/bsv) has changed */
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};
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enum dwc3_id_state {
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DWC3_ID_GROUND = 0,
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DWC3_ID_FLOAT,
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};
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/* external transceiver that can perform connect/disconnect monitoring in LPM */
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struct dwc3_ext_xceiv {
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enum dwc3_id_state id;
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bool bsv;
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bool otg_capability;
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/* to notify OTG about LPM exit event, provided by OTG */
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void (*notify_ext_events)(struct usb_otg *otg,
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enum dwc3_ext_events ext_event);
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/* for block reset USB core */
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void (*ext_block_reset)(bool core_reset);
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};
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/* for external transceiver driver */
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extern int dwc3_set_ext_xceiv(struct usb_otg *otg,
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struct dwc3_ext_xceiv *ext_xceiv);
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#endif /* __LINUX_USB_DWC3_OTG_H */
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