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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
18struct 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/* -------------------------------------------------------------------------- */
52
53#define to_dwc3_request(r) (container_of(r, struct dwc3_request, request))
54
55/**
56 * next_request - gets the next request on the given list
57 * @list: the request list to operate on
58 *
59 * Caller should take care of locking. This function return %NULL or the first
60 * request available on @list.
61 */
62static inline struct dwc3_request *next_request(struct list_head *list)
63{
64 return list_first_entry_or_null(list, struct dwc3_request, list);
65}
66
67/**
68 * dwc3_gadget_move_started_request - move @req to the started_list
69 * @req: the request to be moved
70 *
71 * Caller should take care of locking. This function will move @req from its
72 * current list to the endpoint's started_list.
73 */
74static inline void dwc3_gadget_move_started_request(struct dwc3_request *req)
75{
76 struct dwc3_ep *dep = req->dep;
77
78 req->started = true;
79 list_move_tail(&req->list, &dep->started_list);
80}
81
82/**
83 * dwc3_gadget_move_cancelled_request - move @req to the cancelled_list
84 * @req: the request to be moved
85 *
86 * Caller should take care of locking. This function will move @req from its
87 * current list to the endpoint's cancelled_list.
88 */
89static inline void dwc3_gadget_move_cancelled_request(struct dwc3_request *req)
90{
91 struct dwc3_ep *dep = req->dep;
92
93 req->started = false;
94 list_move_tail(&req->list, &dep->cancelled_list);
95}
96
97void dwc3_gadget_giveback(struct dwc3_ep *dep, struct dwc3_request *req,
98 int status);
99
100void dwc3_ep0_interrupt(struct dwc3 *dwc,
101 const struct dwc3_event_depevt *event);
102void dwc3_ep0_out_start(struct dwc3 *dwc);
103int __dwc3_gadget_ep0_set_halt(struct usb_ep *ep, int value);
104int dwc3_gadget_ep0_set_halt(struct usb_ep *ep, int value);
105int dwc3_gadget_ep0_queue(struct usb_ep *ep, struct usb_request *request,
106 gfp_t gfp_flags);
107int __dwc3_gadget_ep_set_halt(struct dwc3_ep *dep, int value, int protocol);
108
109/**
110 * dwc3_gadget_ep_get_transfer_index - Gets transfer index from HW
111 * @dep: dwc3 endpoint
112 *
113 * Caller should take care of locking. Returns the transfer resource
114 * index for a given endpoint.
115 */
116static inline void dwc3_gadget_ep_get_transfer_index(struct dwc3_ep *dep)
117{
118 u32 res_id;
119
120 res_id = dwc3_readl(dep->regs, DWC3_DEPCMD);
121 dep->resource_index = DWC3_DEPCMD_GET_RSC_IDX(res_id);
122}
123
124#endif /* __DRIVERS_USB_DWC3_GADGET_H */