drivers/usb/cdns3/core.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 /*
   3  * Cadence USBSS 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 #include <linux/usb/otg.h>
  12 #include <linux/usb/role.h>
  13
  14 #ifndef __LINUX_CDNS3_CORE_H
  15 #define __LINUX_CDNS3_CORE_H
  16
  17 struct cdns3;
  18
  19 /**
  20  * struct cdns3_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 cdns3_role_driver {
  30         int (*start)(struct cdns3 *cdns);
  31         void (*stop)(struct cdns3 *cdns);
  32         int (*suspend)(struct cdns3 *cdns, bool do_wakeup);
  33         int (*resume)(struct cdns3 *cdns, bool hibernated);
  34         const char *name;
  35 #define CDNS3_ROLE_STATE_INACTIVE       0
  36 #define CDNS3_ROLE_STATE_ACTIVE         1
  37         int state;
  38 };
  39
  40 #define CDNS3_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 };
  48
  49 /**
  50  * struct cdns3 - Representation of Cadence USB3 DRD controller.
  51  * @dev: pointer to Cadence device struct
  52  * @xhci_regs: pointer to base of xhci registers
  53  * @xhci_res: the resource for xhci
  54  * @dev_regs: pointer to base of dev registers
  55  * @otg_res: the resource for otg
  56  * @otg_v0_regs: pointer to base of v0 otg registers
  57  * @otg_v1_regs: pointer to base of v1 otg registers
  58  * @otg_regs: pointer to base of otg registers
  59  * @otg_irq: irq number for otg controller
  60  * @dev_irq: irq number for device controller
  61  * @wakeup_irq: irq number for wakeup event, it is optional
  62  * @roles: array of supported roles for this controller
  63  * @role: current role
  64  * @host_dev: the child host device pointer for cdns3 core
  65  * @gadget_dev: the child gadget device pointer for cdns3 core
  66  * @usb2_phy: pointer to USB2 PHY
  67  * @usb3_phy: pointer to USB3 PHY
  68  * @mutex: the mutex for concurrent code at driver
  69  * @dr_mode: supported mode of operation it can be only Host, only Device
  70  *           or OTG mode that allow to switch between Device and Host mode.
  71  *           This field based on firmware setting, kernel configuration
  72  *           and hardware configuration.
  73  * @role_sw: pointer to role switch object.
  74  * @in_lpm: indicate the controller is in low power mode
  75  * @wakeup_pending: wakeup interrupt pending
  76  * @pdata: platform data from glue layer
  77  * @lock: spinlock structure
  78  * @xhci_plat_data: xhci private data structure pointer
  79  */
  80 struct cdns3 {
  81         struct device                   *dev;
  82         void __iomem                    *xhci_regs;
  83         struct resource                 xhci_res[CDNS3_XHCI_RESOURCES_NUM];
  84         struct cdns3_usb_regs __iomem   *dev_regs;
  85
  86         struct resource                 otg_res;
  87         struct cdns3_otg_legacy_regs    *otg_v0_regs;
  88         struct cdns3_otg_regs           *otg_v1_regs;
  89         struct cdns3_otg_common_regs    *otg_regs;
  90 #define CDNS3_CONTROLLER_V0     0
  91 #define CDNS3_CONTROLLER_V1     1
  92         u32                             version;
  93         bool                            phyrst_a_enable;
  94
  95         int                             otg_irq;
  96         int                             dev_irq;
  97         int                             wakeup_irq;
  98         struct cdns3_role_driver        *roles[USB_ROLE_DEVICE + 1];
  99         enum usb_role                   role;
 100         struct platform_device          *host_dev;
 101         struct cdns3_device             *gadget_dev;
 102         struct phy                      *usb2_phy;
 103         struct phy                      *usb3_phy;
 104         /* mutext used in workqueue*/
 105         struct mutex                    mutex;
 106         enum usb_dr_mode                dr_mode;
 107         struct usb_role_switch          *role_sw;
 108         bool                            in_lpm;
 109         bool                            wakeup_pending;
 110         struct cdns3_platform_data      *pdata;
 111         spinlock_t                      lock;
 112         struct xhci_plat_priv           *xhci_plat_data;
 113 };
 114
 115 int cdns3_hw_role_switch(struct cdns3 *cdns);
 116
 117 #endif /* __LINUX_CDNS3_CORE_H */