drivers/usb/dwc3/gadget.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 /*
   3  * gadget.h - DesignWare USB3 DRD Gadget Header
   4  *
   5  * Copyright (C) 2010-2011 Texas Instruments Incorporated - https://www.ti.com
   6  *
   7  * Authors: Felipe Balbi <balbi@ti.com>,
   8  *          Sebastian Andrzej Siewior <bigeasy@linutronix.de>
   9  */
  10
  11 #ifndef __DRIVERS_USB_DWC3_GADGET_H
  12 #define __DRIVERS_USB_DWC3_GADGET_H
  13
  14 #include <linux/list.h>
  15 #include <linux/usb/gadget.h>
  16 #include "io.h"
  17
  18 struct dwc3;
  19 #define to_dwc3_ep(ep)          (container_of(ep, struct dwc3_ep, endpoint))
  20 #define gadget_to_dwc(g)        (dev_get_platdata(&g->dev))
  21
  22 /* DEPCFG parameter 1 */
  23 #define DWC3_DEPCFG_INT_NUM(n)          (((n) & 0x1f) << 0)
  24 #define DWC3_DEPCFG_XFER_COMPLETE_EN    BIT(8)
  25 #define DWC3_DEPCFG_XFER_IN_PROGRESS_EN BIT(9)
  26 #define DWC3_DEPCFG_XFER_NOT_READY_EN   BIT(10)
  27 #define DWC3_DEPCFG_FIFO_ERROR_EN       BIT(11)
  28 #define DWC3_DEPCFG_STREAM_EVENT_EN     BIT(13)
  29 #define DWC3_DEPCFG_BINTERVAL_M1(n)     (((n) & 0xff) << 16)
  30 #define DWC3_DEPCFG_STREAM_CAPABLE      BIT(24)
  31 #define DWC3_DEPCFG_EP_NUMBER(n)        (((n) & 0x1f) << 25)
  32 #define DWC3_DEPCFG_BULK_BASED          BIT(30)
  33 #define DWC3_DEPCFG_FIFO_BASED          BIT(31)
  34
  35 /* DEPCFG parameter 0 */
  36 #define DWC3_DEPCFG_EP_TYPE(n)          (((n) & 0x3) << 1)
  37 #define DWC3_DEPCFG_MAX_PACKET_SIZE(n)  (((n) & 0x7ff) << 3)
  38 #define DWC3_DEPCFG_FIFO_NUMBER(n)      (((n) & 0x1f) << 17)
  39 #define DWC3_DEPCFG_BURST_SIZE(n)       (((n) & 0xf) << 22)
  40 #define DWC3_DEPCFG_DATA_SEQ_NUM(n)     ((n) << 26)
  41 /* This applies for core versions earlier than 1.94a */
  42 #define DWC3_DEPCFG_IGN_SEQ_NUM         BIT(31)
  43 /* These apply for core versions 1.94a and later */
  44 #define DWC3_DEPCFG_ACTION_INIT         (0 << 30)
  45 #define DWC3_DEPCFG_ACTION_RESTORE      BIT(30)
  46 #define DWC3_DEPCFG_ACTION_MODIFY       (2 << 30)
  47
  48 /* DEPXFERCFG parameter 0 */
  49 #define DWC3_DEPXFERCFG_NUM_XFER_RES(n) ((n) & 0xffff)
  50
  51 /* U1 Device exit Latency */
  52 #define DWC3_DEFAULT_U1_DEV_EXIT_LAT    0x0A    /* Less then 10 microsec */
  53
  54 /* U2 Device exit Latency */
  55 #define DWC3_DEFAULT_U2_DEV_EXIT_LAT    0x1FF   /* Less then 511 microsec */
  56
  57 /* Frame/Microframe Number Mask */
  58 #define DWC3_FRNUMBER_MASK              0x3fff
  59 /* -------------------------------------------------------------------------- */
  60
  61 #define to_dwc3_request(r)      (container_of(r, struct dwc3_request, request))
  62
  63 /**
  64  * next_request - gets the next request on the given list
  65  * @list: the request list to operate on
  66  *
  67  * Caller should take care of locking. This function return %NULL or the first
  68  * request available on @list.
  69  */
  70 static inline struct dwc3_request *next_request(struct list_head *list)
  71 {
  72         return list_first_entry_or_null(list, struct dwc3_request, list);
  73 }
  74
  75 /**
  76  * dwc3_gadget_move_started_request - move @req to the started_list
  77  * @req: the request to be moved
  78  *
  79  * Caller should take care of locking. This function will move @req from its
  80  * current list to the endpoint's started_list.
  81  */
  82 static inline void dwc3_gadget_move_started_request(struct dwc3_request *req)
  83 {
  84         struct dwc3_ep          *dep = req->dep;
  85
  86         req->status = DWC3_REQUEST_STATUS_STARTED;
  87         list_move_tail(&req->list, &dep->started_list);
  88 }
  89
  90 /**
  91  * dwc3_gadget_move_cancelled_request - move @req to the cancelled_list
  92  * @req: the request to be moved
  93  *
  94  * Caller should take care of locking. This function will move @req from its
  95  * current list to the endpoint's cancelled_list.
  96  */
  97 static inline void dwc3_gadget_move_cancelled_request(struct dwc3_request *req)
  98 {
  99         struct dwc3_ep          *dep = req->dep;
 100
 101         req->status = DWC3_REQUEST_STATUS_CANCELLED;
 102         list_move_tail(&req->list, &dep->cancelled_list);
 103 }
 104
 105 void dwc3_gadget_giveback(struct dwc3_ep *dep, struct dwc3_request *req,
 106                 int status);
 107
 108 void dwc3_ep0_interrupt(struct dwc3 *dwc,
 109                 const struct dwc3_event_depevt *event);
 110 void dwc3_ep0_out_start(struct dwc3 *dwc);
 111 int __dwc3_gadget_ep0_set_halt(struct usb_ep *ep, int value);
 112 int dwc3_gadget_ep0_set_halt(struct usb_ep *ep, int value);
 113 int dwc3_gadget_ep0_queue(struct usb_ep *ep, struct usb_request *request,
 114                 gfp_t gfp_flags);
 115 int __dwc3_gadget_ep_set_halt(struct dwc3_ep *dep, int value, int protocol);
 116 void dwc3_ep0_send_delayed_status(struct dwc3 *dwc);
 117
 118 /**
 119  * dwc3_gadget_ep_get_transfer_index - Gets transfer index from HW
 120  * @dep: dwc3 endpoint
 121  *
 122  * Caller should take care of locking. Returns the transfer resource
 123  * index for a given endpoint.
 124  */
 125 static inline void dwc3_gadget_ep_get_transfer_index(struct dwc3_ep *dep)
 126 {
 127         u32                     res_id;
 128
 129         res_id = dwc3_readl(dep->regs, DWC3_DEPCMD);
 130         dep->resource_index = DWC3_DEPCMD_GET_RSC_IDX(res_id);
 131 }
 132
 133 /**
 134  * dwc3_gadget_dctl_write_safe - write to DCTL safe from link state change
 135  * @dwc: pointer to our context structure
 136  * @value: value to write to DCTL
 137  *
 138  * Use this function when doing read-modify-write to DCTL. It will not
 139  * send link state change request.
 140  */
 141 static inline void dwc3_gadget_dctl_write_safe(struct dwc3 *dwc, u32 value)
 142 {
 143         value &= ~DWC3_DCTL_ULSTCHNGREQ_MASK;
 144         dwc3_writel(dwc->regs, DWC3_DCTL, value);
 145 }
 146
 147 #endif /* __DRIVERS_USB_DWC3_GADGET_H */