drivers/usb/dwc3/gadget.h

   1 /**
   2  * gadget.h - DesignWare USB3 DRD Gadget Header
   3  *
   4  * Copyright (C) 2010-2011 Texas Instruments Incorporated - http://www.ti.com
   5  *
   6  * Authors: Felipe Balbi <balbi@ti.com>,
   7  *          Sebastian Andrzej Siewior <bigeasy@linutronix.de>
   8  *
   9  * This program is free software: you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License version 2  of
  11  * the License as published by the Free Software Foundation.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU General Public License for more details.
  17  */
  18
  19 #ifndef __DRIVERS_USB_DWC3_GADGET_H
  20 #define __DRIVERS_USB_DWC3_GADGET_H
  21
  22 #include <linux/list.h>
  23 #include <linux/usb/gadget.h>
  24 #include "io.h"
  25
  26 struct dwc3;
  27 #define to_dwc3_ep(ep)          (container_of(ep, struct dwc3_ep, endpoint))
  28 #define gadget_to_dwc(g)        (container_of(g, struct dwc3, gadget))
  29
  30 /* DEPCFG parameter 1 */
  31 #define DWC3_DEPCFG_INT_NUM(n)          ((n) << 0)
  32 #define DWC3_DEPCFG_XFER_COMPLETE_EN    (1 << 8)
  33 #define DWC3_DEPCFG_XFER_IN_PROGRESS_EN (1 << 9)
  34 #define DWC3_DEPCFG_XFER_NOT_READY_EN   (1 << 10)
  35 #define DWC3_DEPCFG_FIFO_ERROR_EN       (1 << 11)
  36 #define DWC3_DEPCFG_STREAM_EVENT_EN     (1 << 13)
  37 #define DWC3_DEPCFG_BINTERVAL_M1(n)     ((n) << 16)
  38 #define DWC3_DEPCFG_STREAM_CAPABLE      (1 << 24)
  39 #define DWC3_DEPCFG_EP_NUMBER(n)        ((n) << 25)
  40 #define DWC3_DEPCFG_BULK_BASED          (1 << 30)
  41 #define DWC3_DEPCFG_FIFO_BASED          (1 << 31)
  42
  43 /* DEPCFG parameter 0 */
  44 #define DWC3_DEPCFG_EP_TYPE(n)          ((n) << 1)
  45 #define DWC3_DEPCFG_MAX_PACKET_SIZE(n)  ((n) << 3)
  46 #define DWC3_DEPCFG_FIFO_NUMBER(n)      ((n) << 17)
  47 #define DWC3_DEPCFG_BURST_SIZE(n)       ((n) << 22)
  48 #define DWC3_DEPCFG_DATA_SEQ_NUM(n)     ((n) << 26)
  49 /* This applies for core versions earlier than 1.94a */
  50 #define DWC3_DEPCFG_IGN_SEQ_NUM         (1 << 31)
  51 /* These apply for core versions 1.94a and later */
  52 #define DWC3_DEPCFG_ACTION_INIT         (0 << 30)
  53 #define DWC3_DEPCFG_ACTION_RESTORE      (1 << 30)
  54 #define DWC3_DEPCFG_ACTION_MODIFY       (2 << 30)
  55
  56 /* DEPXFERCFG parameter 0 */
  57 #define DWC3_DEPXFERCFG_NUM_XFER_RES(n) ((n) & 0xffff)
  58
  59 struct dwc3_gadget_ep_cmd_params {
  60         u32     param2;
  61         u32     param1;
  62         u32     param0;
  63 };
  64
  65 /* -------------------------------------------------------------------------- */
  66
  67 #define to_dwc3_request(r)      (container_of(r, struct dwc3_request, request))
  68
  69 static inline struct dwc3_request *next_request(struct list_head *list)
  70 {
  71         if (list_empty(list))
  72                 return NULL;
  73
  74         return list_first_entry(list, struct dwc3_request, list);
  75 }
  76
  77 static inline void dwc3_gadget_move_request_queued(struct dwc3_request *req)
  78 {
  79         struct dwc3_ep          *dep = req->dep;
  80
  81         req->queued = true;
  82         list_move_tail(&req->list, &dep->req_queued);
  83 }
  84
  85 void dwc3_gadget_giveback(struct dwc3_ep *dep, struct dwc3_request *req,
  86                 int status);
  87
  88 int dwc3_gadget_set_test_mode(struct dwc3 *dwc, int mode);
  89 int dwc3_gadget_set_link_state(struct dwc3 *dwc, enum dwc3_link_state state);
  90
  91 void dwc3_ep0_interrupt(struct dwc3 *dwc,
  92                 const struct dwc3_event_depevt *event);
  93 void dwc3_ep0_out_start(struct dwc3 *dwc);
  94 int dwc3_gadget_ep0_set_halt(struct usb_ep *ep, int value);
  95 int dwc3_gadget_ep0_queue(struct usb_ep *ep, struct usb_request *request,
  96                 gfp_t gfp_flags);
  97 int __dwc3_gadget_ep_set_halt(struct dwc3_ep *dep, int value);
  98 int dwc3_send_gadget_ep_cmd(struct dwc3 *dwc, unsigned ep,
  99                 unsigned cmd, struct dwc3_gadget_ep_cmd_params *params);
 100 int dwc3_send_gadget_generic_command(struct dwc3 *dwc, int cmd, u32 param);
 101
 102 /**
 103  * dwc3_gadget_ep_get_transfer_index - Gets transfer index from HW
 104  * @dwc: DesignWare USB3 Pointer
 105  * @number: DWC endpoint number
 106  *
 107  * Caller should take care of locking
 108  */
 109 static inline u32 dwc3_gadget_ep_get_transfer_index(struct dwc3 *dwc, u8 number)
 110 {
 111         u32                     res_id;
 112
 113         res_id = dwc3_readl(dwc->regs, DWC3_DEPCMD(number));
 114
 115         return DWC3_DEPCMD_GET_RSC_IDX(res_id);
 116 }
 117
 118 /**
 119  * dwc3_gadget_event_string - returns event name
 120  * @event: the event code
 121  */
 122 static inline const char *dwc3_gadget_event_string(u8 event)
 123 {
 124         switch (event) {
 125         case DWC3_DEVICE_EVENT_DISCONNECT:
 126                 return "Disconnect";
 127         case DWC3_DEVICE_EVENT_RESET:
 128                 return "Reset";
 129         case DWC3_DEVICE_EVENT_CONNECT_DONE:
 130                 return "Connection Done";
 131         case DWC3_DEVICE_EVENT_LINK_STATUS_CHANGE:
 132                 return "Link Status Change";
 133         case DWC3_DEVICE_EVENT_WAKEUP:
 134                 return "WakeUp";
 135         case DWC3_DEVICE_EVENT_EOPF:
 136                 return "End-Of-Frame";
 137         case DWC3_DEVICE_EVENT_SOF:
 138                 return "Start-Of-Frame";
 139         case DWC3_DEVICE_EVENT_ERRATIC_ERROR:
 140                 return "Erratic Error";
 141         case DWC3_DEVICE_EVENT_CMD_CMPL:
 142                 return "Command Complete";
 143         case DWC3_DEVICE_EVENT_OVERFLOW:
 144                 return "Overflow";
 145         }
 146
 147         return "UNKNOWN";
 148 }
 149
 150 /**
 151  * dwc3_ep_event_string - returns event name
 152  * @event: then event code
 153  */
 154 static inline const char *dwc3_ep_event_string(u8 event)
 155 {
 156         switch (event) {
 157         case DWC3_DEPEVT_XFERCOMPLETE:
 158                 return "Transfer Complete";
 159         case DWC3_DEPEVT_XFERINPROGRESS:
 160                 return "Transfer In-Progress";
 161         case DWC3_DEPEVT_XFERNOTREADY:
 162                 return "Transfer Not Ready";
 163         case DWC3_DEPEVT_RXTXFIFOEVT:
 164                 return "FIFO";
 165         case DWC3_DEPEVT_STREAMEVT:
 166                 return "Stream";
 167         case DWC3_DEPEVT_EPCMDCMPLT:
 168                 return "Endpoint Command Complete";
 169         }
 170
 171         return "UNKNOWN";
 172 }
 173
 174 #endif /* __DRIVERS_USB_DWC3_GADGET_H */