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/* SPDX-License-Identifier: GPL-2.0 */
/*
* Cadence USBSS DRD Header File.
*
* Copyright (C) 2017-2018 NXP
* Copyright (C) 2018-2019 Cadence.
*
* Authors: Peter Chen <peter.chen@nxp.com>
* Pawel Laszczak <pawell@cadence.com>
*/
#include <linux/usb/otg.h>
#ifndef __LINUX_CDNS3_CORE_H
#define __LINUX_CDNS3_CORE_H
struct cdns3;
enum cdns3_roles {
CDNS3_ROLE_IDLE = 0,
CDNS3_ROLE_HOST,
CDNS3_ROLE_GADGET,
CDNS3_ROLE_END,
};
/**
* struct cdns3_role_driver - host/gadget role driver
* @start: start this role
* @stop: stop this role
* @suspend: suspend callback for this role
* @resume: resume callback for this role
* @irq: irq handler for this role
* @name: role name string (host/gadget)
* @state: current state
*/
struct cdns3_role_driver {
int (*start)(struct cdns3 *cdns);
void (*stop)(struct cdns3 *cdns);
int (*suspend)(struct cdns3 *cdns, bool do_wakeup);
int (*resume)(struct cdns3 *cdns, bool hibernated);
const char *name;
#define CDNS3_ROLE_STATE_INACTIVE 0
#define CDNS3_ROLE_STATE_ACTIVE 1
int state;
};
#define CDNS3_XHCI_RESOURCES_NUM 2
/**
* struct cdns3 - Representation of Cadence USB3 DRD controller.
* @dev: pointer to Cadence device struct
* @xhci_regs: pointer to base of xhci registers
* @xhci_res: the resource for xhci
* @dev_regs: pointer to base of dev registers
* @otg_res: the resource for otg
* @otg_v0_regs: pointer to base of v0 otg registers
* @otg_v1_regs: pointer to base of v1 otg registers
* @otg_regs: pointer to base of otg registers
* @otg_irq: irq number for otg controller
* @dev_irq: irq number for device controller
* @roles: array of supported roles for this controller
* @role: current role
* @host_dev: the child host device pointer for cdns3 core
* @gadget_dev: the child gadget device pointer for cdns3 core
* @usb2_phy: pointer to USB2 PHY
* @usb3_phy: pointer to USB3 PHY
* @role_switch_wq: work queue item for role switch
* @wakeup_int: the wakeup interrupt
* @mutex: the mutex for concurrent code at driver
* @dr_mode: supported mode of operation it can be only Host, only Device
* or OTG mode that allow to switch between Device and Host mode.
* This field based on firmware setting, kernel configuration
* and hardware configuration.
* @current_dr_mode: current mode of operation when in dual-role mode
* @desired_dr_mode: desired mode of operation when in dual-role mode.
* This value can be changed during runtime.
* Available options depends on dr_mode:
* dr_mode | desired_dr_mode and current_dr_mode
* ----------------------------------------------------------------
* USB_DR_MODE_HOST | only USB_DR_MODE_HOST
* USB_DR_MODE_PERIPHERAL | only USB_DR_MODE_PERIPHERAL
* USB_DR_MODE_OTG | USB_DR_MODE_OTG or USB_DR_MODE_HOST or
* | USB_DR_MODE_PERIPHERAL
* Desired_dr_role can be changed by means of debugfs.
* @root: debugfs root folder pointer
* @debug_disable:
*/
struct cdns3 {
struct device *dev;
void __iomem *xhci_regs;
struct resource xhci_res[CDNS3_XHCI_RESOURCES_NUM];
struct cdns3_usb_regs __iomem *dev_regs;
struct resource otg_res;
struct cdns3_otg_legacy_regs *otg_v0_regs;
struct cdns3_otg_regs *otg_v1_regs;
struct cdns3_otg_common_regs *otg_regs;
#define CDNS3_CONTROLLER_V0 0
#define CDNS3_CONTROLLER_V1 1
u32 version;
int otg_irq;
int dev_irq;
struct cdns3_role_driver *roles[CDNS3_ROLE_END];
enum cdns3_roles role;
struct platform_device *host_dev;
struct cdns3_device *gadget_dev;
struct phy *usb2_phy;
struct phy *usb3_phy;
struct work_struct role_switch_wq;
int wakeup_int:1;
/* mutext used in workqueue*/
struct mutex mutex;
enum usb_dr_mode dr_mode;
enum usb_dr_mode current_dr_mode;
enum usb_dr_mode desired_dr_mode;
struct dentry *root;
int debug_disable:1;
};
void cdns3_role_stop(struct cdns3 *cdns);
int cdns3_handshake(void __iomem *ptr, u32 mask, u32 done, int usec);
#endif /* __LINUX_CDNS3_CORE_H */
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