1 /* SPDX-License-Identifier: GPL-2.0 */ 2 /* 3 * Cadence USBSS and USBSSP DRD Header File. 4 * 5 * Copyright (C) 2017-2018 NXP 6 * Copyright (C) 2018-2019 Cadence. 7 * 8 * Authors: Peter Chen <peter.chen@nxp.com> 9 * Pawel Laszczak <pawell@cadence.com> 10 */ 11 #ifndef __LINUX_CDNS3_CORE_H 12 #define __LINUX_CDNS3_CORE_H 13 14 #include <linux/usb/otg.h> 15 #include <linux/usb/role.h> 16 17 struct cdns; 18 19 /** 20 * struct cdns_role_driver - host/gadget role driver 21 * @start: start this role 22 * @stop: stop this role 23 * @suspend: suspend callback for this role 24 * @resume: resume callback for this role 25 * @irq: irq handler for this role 26 * @name: role name string (host/gadget) 27 * @state: current state 28 */ 29 struct cdns_role_driver { 30 int (*start)(struct cdns *cdns); 31 void (*stop)(struct cdns *cdns); 32 int (*suspend)(struct cdns *cdns, bool do_wakeup); 33 int (*resume)(struct cdns *cdns, bool lost_power); 34 const char *name; 35 #define CDNS_ROLE_STATE_INACTIVE 0 36 #define CDNS_ROLE_STATE_ACTIVE 1 37 int state; 38 }; 39 40 #define CDNS_XHCI_RESOURCES_NUM 2 41 42 struct cdns3_platform_data { 43 int (*platform_suspend)(struct device *dev, 44 bool suspend, bool wakeup); 45 unsigned long quirks; 46 #define CDNS3_DEFAULT_PM_RUNTIME_ALLOW BIT(0) 47 #define CDNS3_DRD_SUSPEND_RESIDENCY_ENABLE BIT(1) 48 }; 49 50 /** 51 * struct cdns - Representation of Cadence USB3 DRD controller. 52 * @dev: pointer to Cadence device struct 53 * @xhci_regs: pointer to base of xhci registers 54 * @xhci_res: the resource for xhci 55 * @dev_regs: pointer to base of dev registers 56 * @otg_res: the resource for otg 57 * @otg_v0_regs: pointer to base of v0 otg registers 58 * @otg_v1_regs: pointer to base of v1 otg registers 59 * @otg_cdnsp_regs: pointer to base of CDNSP otg registers 60 * @otg_regs: pointer to base of otg registers 61 * @otg_irq_regs: pointer to interrupt registers 62 * @otg_irq: irq number for otg controller 63 * @dev_irq: irq number for device controller 64 * @wakeup_irq: irq number for wakeup event, it is optional 65 * @roles: array of supported roles for this controller 66 * @role: current role 67 * @host_dev: the child host device pointer for cdns core 68 * @gadget_dev: the child gadget device pointer 69 * @usb2_phy: pointer to USB2 PHY 70 * @usb3_phy: pointer to USB3 PHY 71 * @mutex: the mutex for concurrent code at driver 72 * @dr_mode: supported mode of operation it can be only Host, only Device 73 * or OTG mode that allow to switch between Device and Host mode. 74 * This field based on firmware setting, kernel configuration 75 * and hardware configuration. 76 * @role_sw: pointer to role switch object. 77 * @in_lpm: indicate the controller is in low power mode 78 * @wakeup_pending: wakeup interrupt pending 79 * @pdata: platform data from glue layer 80 * @lock: spinlock structure 81 * @xhci_plat_data: xhci private data structure pointer 82 * @override_apb_timeout: hold value of APB timeout. For value 0 the default 83 * value in CHICKEN_BITS_3 will be preserved. 84 * @gadget_init: pointer to gadget initialization function 85 */ 86 struct cdns { 87 struct device *dev; 88 void __iomem *xhci_regs; 89 struct resource xhci_res[CDNS_XHCI_RESOURCES_NUM]; 90 struct cdns3_usb_regs __iomem *dev_regs; 91 92 struct resource otg_res; 93 struct cdns3_otg_legacy_regs __iomem *otg_v0_regs; 94 struct cdns3_otg_regs __iomem *otg_v1_regs; 95 struct cdnsp_otg_regs __iomem *otg_cdnsp_regs; 96 struct cdns_otg_common_regs __iomem *otg_regs; 97 struct cdns_otg_irq_regs __iomem *otg_irq_regs; 98 #define CDNS3_CONTROLLER_V0 0 99 #define CDNS3_CONTROLLER_V1 1 100 #define CDNSP_CONTROLLER_V2 2 101 u32 version; 102 bool phyrst_a_enable; 103 104 int otg_irq; 105 int dev_irq; 106 int wakeup_irq; 107 struct cdns_role_driver *roles[USB_ROLE_DEVICE + 1]; 108 enum usb_role role; 109 struct platform_device *host_dev; 110 void *gadget_dev; 111 struct phy *usb2_phy; 112 struct phy *usb3_phy; 113 /* mutext used in workqueue*/ 114 struct mutex mutex; 115 enum usb_dr_mode dr_mode; 116 struct usb_role_switch *role_sw; 117 bool in_lpm; 118 bool wakeup_pending; 119 struct cdns3_platform_data *pdata; 120 spinlock_t lock; 121 struct xhci_plat_priv *xhci_plat_data; 122 u32 override_apb_timeout; 123 124 int (*gadget_init)(struct cdns *cdns); 125 }; 126 127 int cdns_hw_role_switch(struct cdns *cdns); 128 int cdns_init(struct cdns *cdns); 129 int cdns_remove(struct cdns *cdns); 130 131 #ifdef CONFIG_PM_SLEEP 132 int cdns_resume(struct cdns *cdns); 133 int cdns_suspend(struct cdns *cdns); 134 void cdns_set_active(struct cdns *cdns, u8 set_active); 135 #else /* CONFIG_PM_SLEEP */ 136 static inline int cdns_resume(struct cdns *cdns) 137 { return 0; } 138 static inline void cdns_set_active(struct cdns *cdns, u8 set_active) { } 139 static inline int cdns_suspend(struct cdns *cdns) 140 { return 0; } 141 #endif /* CONFIG_PM_SLEEP */ 142 #endif /* __LINUX_CDNS3_CORE_H */ 143