/* SPDX-License-Identifier: GPL-2.0 */
/*
* Cadence USBSS and USBSSP 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 >
*/
#ifndef __LINUX_CDNS3_CORE_H
#define __LINUX_CDNS3_CORE_H
#include <linux/usb/otg.h>
#include <linux/usb/role.h>
struct cdns;
/**
* struct cdns_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 cdns_role_driver {
int (*start)(struct cdns *cdns);
void (*stop)(struct cdns *cdns);
int (*suspend)(struct cdns *cdns, bool do_wakeup);
int (*resume)(struct cdns *cdns, bool lost_power);
const char *name;
#define CDNS_ROLE_STATE_INACTIVE 0
#define CDNS_ROLE_STATE_ACTIVE 1
int state;
};
#define CDNS_XHCI_RESOURCES_NUM 2
struct cdns3_platform_data {
int (*platform_suspend)(struct device *dev,
bool suspend, bool wakeup);
unsigned long quirks;
#define CDNS3_DEFAULT_PM_RUNTIME_ALLOW BIT(0 )
#define CDNS3_DRD_SUSPEND_RESIDENCY_ENABLE BIT(1 )
};
/**
* struct cdns - 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_cdnsp_regs : pointer to base of CDNSP otg registers
* @ otg_regs : pointer to base of otg registers
* @ otg_irq_regs : pointer to interrupt registers
* @ otg_irq : irq number for otg controller
* @ dev_irq : irq number for device controller
* @ wakeup_irq : irq number for wakeup event , it is optional
* @ roles : array of supported roles for this controller
* @ role : current role
* @ host_dev : the child host device pointer for cdns core
* @ gadget_dev : the child gadget device pointer
* @ usb2_phy : pointer to USB2 PHY
* @ usb3_phy : pointer to USB3 PHY
* @ 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 .
* @ role_sw : pointer to role switch object .
* @ in_lpm : indicate the controller is in low power mode
* @ wakeup_pending : wakeup interrupt pending
* @ pdata : platform data from glue layer
* @ lock : spinlock structure
* @ xhci_plat_data : xhci private data structure pointer
* @ override_apb_timeout : hold value of APB timeout . For value 0 the default
* value in CHICKEN_BITS_3 will be preserved .
* @ gadget_init : pointer to gadget initialization function
*/
struct cdns {
struct device *dev;
void __iomem *xhci_regs;
struct resource xhci_res[CDNS_XHCI_RESOURCES_NUM];
struct cdns3_usb_regs __iomem *dev_regs;
struct resource otg_res;
struct cdns3_otg_legacy_regs __iomem *otg_v0_regs;
struct cdns3_otg_regs __iomem *otg_v1_regs;
struct cdnsp_otg_regs __iomem *otg_cdnsp_regs;
struct cdns_otg_common_regs __iomem *otg_regs;
struct cdns_otg_irq_regs __iomem *otg_irq_regs;
#define CDNS3_CONTROLLER_V0 0
#define CDNS3_CONTROLLER_V1 1
#define CDNSP_CONTROLLER_V2 2
u32 version;
bool phyrst_a_enable;
int otg_irq;
int dev_irq;
int wakeup_irq;
struct cdns_role_driver *roles[USB_ROLE_DEVICE + 1 ];
enum usb_role role;
struct platform_device *host_dev;
void *gadget_dev;
struct phy *usb2_phy;
struct phy *usb3_phy;
/* mutext used in workqueue*/
struct mutex mutex;
enum usb_dr_mode dr_mode;
struct usb_role_switch *role_sw;
bool in_lpm;
bool wakeup_pending;
struct cdns3_platform_data *pdata;
spinlock_t lock;
struct xhci_plat_priv *xhci_plat_data;
u32 override_apb_timeout;
int (*gadget_init)(struct cdns *cdns);
};
int cdns_hw_role_switch(struct cdns *cdns);
int cdns_init(struct cdns *cdns);
int cdns_remove(struct cdns *cdns);
#ifdef CONFIG_PM_SLEEP
int cdns_resume(struct cdns *cdns);
int cdns_suspend(struct cdns *cdns);
void cdns_set_active(struct cdns *cdns, u8 set_active);
#else /* CONFIG_PM_SLEEP */
static inline int cdns_resume(struct cdns *cdns)
{ return 0 ; }
static inline void cdns_set_active(struct cdns *cdns, u8 set_active) { }
static inline int cdns_suspend(struct cdns *cdns)
{ return 0 ; }
#endif /* CONFIG_PM_SLEEP */
#endif /* __LINUX_CDNS3_CORE_H */
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