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 - http://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) (container_of(g, struct dwc3, gadget)) 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 /* -------------------------------------------------------------------------- */ 58 59 #define to_dwc3_request(r) (container_of(r, struct dwc3_request, request)) 60 61 /** 62 * next_request - gets the next request on the given list 63 * @list: the request list to operate on 64 * 65 * Caller should take care of locking. This function return %NULL or the first 66 * request available on @list. 67 */ 68 static inline struct dwc3_request *next_request(struct list_head *list) 69 { 70 return list_first_entry_or_null(list, struct dwc3_request, list); 71 } 72 73 /** 74 * dwc3_gadget_move_started_request - move @req to the started_list 75 * @req: the request to be moved 76 * 77 * Caller should take care of locking. This function will move @req from its 78 * current list to the endpoint's started_list. 79 */ 80 static inline void dwc3_gadget_move_started_request(struct dwc3_request *req) 81 { 82 struct dwc3_ep *dep = req->dep; 83 84 req->status = DWC3_REQUEST_STATUS_STARTED; 85 list_move_tail(&req->list, &dep->started_list); 86 } 87 88 /** 89 * dwc3_gadget_move_cancelled_request - move @req to the cancelled_list 90 * @req: the request to be moved 91 * 92 * Caller should take care of locking. This function will move @req from its 93 * current list to the endpoint's cancelled_list. 94 */ 95 static inline void dwc3_gadget_move_cancelled_request(struct dwc3_request *req) 96 { 97 struct dwc3_ep *dep = req->dep; 98 99 req->status = DWC3_REQUEST_STATUS_CANCELLED; 100 list_move_tail(&req->list, &dep->cancelled_list); 101 } 102 103 void dwc3_gadget_giveback(struct dwc3_ep *dep, struct dwc3_request *req, 104 int status); 105 106 void dwc3_ep0_interrupt(struct dwc3 *dwc, 107 const struct dwc3_event_depevt *event); 108 void dwc3_ep0_out_start(struct dwc3 *dwc); 109 int __dwc3_gadget_ep0_set_halt(struct usb_ep *ep, int value); 110 int dwc3_gadget_ep0_set_halt(struct usb_ep *ep, int value); 111 int dwc3_gadget_ep0_queue(struct usb_ep *ep, struct usb_request *request, 112 gfp_t gfp_flags); 113 int __dwc3_gadget_ep_set_halt(struct dwc3_ep *dep, int value, int protocol); 114 115 /** 116 * dwc3_gadget_ep_get_transfer_index - Gets transfer index from HW 117 * @dep: dwc3 endpoint 118 * 119 * Caller should take care of locking. Returns the transfer resource 120 * index for a given endpoint. 121 */ 122 static inline void dwc3_gadget_ep_get_transfer_index(struct dwc3_ep *dep) 123 { 124 u32 res_id; 125 126 res_id = dwc3_readl(dep->regs, DWC3_DEPCMD); 127 dep->resource_index = DWC3_DEPCMD_GET_RSC_IDX(res_id); 128 } 129 130 /** 131 * dwc3_gadget_dctl_write_safe - write to DCTL safe from link state change 132 * @dwc: pointer to our context structure 133 * @value: value to write to DCTL 134 * 135 * Use this function when doing read-modify-write to DCTL. It will not 136 * send link state change request. 137 */ 138 static inline void dwc3_gadget_dctl_write_safe(struct dwc3 *dwc, u32 value) 139 { 140 value &= ~DWC3_DCTL_ULSTCHNGREQ_MASK; 141 dwc3_writel(dwc->regs, DWC3_DCTL, value); 142 } 143 144 #endif /* __DRIVERS_USB_DWC3_GADGET_H */ 145