xref: /openbmc/linux/drivers/usb/dwc3/gadget.h (revision a36954f5)
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) & 0x1f) << 0)
32 #define DWC3_DEPCFG_XFER_COMPLETE_EN	BIT(8)
33 #define DWC3_DEPCFG_XFER_IN_PROGRESS_EN	BIT(9)
34 #define DWC3_DEPCFG_XFER_NOT_READY_EN	BIT(10)
35 #define DWC3_DEPCFG_FIFO_ERROR_EN	BIT(11)
36 #define DWC3_DEPCFG_STREAM_EVENT_EN	BIT(12)
37 #define DWC3_DEPCFG_BINTERVAL_M1(n)	(((n) & 0xff) << 16)
38 #define DWC3_DEPCFG_STREAM_CAPABLE	BIT(24)
39 #define DWC3_DEPCFG_EP_NUMBER(n)	(((n) & 0x1f) << 25)
40 #define DWC3_DEPCFG_BULK_BASED		BIT(30)
41 #define DWC3_DEPCFG_FIFO_BASED		BIT(31)
42 
43 /* DEPCFG parameter 0 */
44 #define DWC3_DEPCFG_EP_TYPE(n)		(((n) & 0x3) << 1)
45 #define DWC3_DEPCFG_MAX_PACKET_SIZE(n)	(((n) & 0x7ff) << 3)
46 #define DWC3_DEPCFG_FIFO_NUMBER(n)	(((n) & 0x1f) << 17)
47 #define DWC3_DEPCFG_BURST_SIZE(n)	(((n) & 0xf) << 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		BIT(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	BIT(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 /* -------------------------------------------------------------------------- */
60 
61 #define to_dwc3_request(r)	(container_of(r, struct dwc3_request, request))
62 
63 static inline struct dwc3_request *next_request(struct list_head *list)
64 {
65 	return list_first_entry_or_null(list, struct dwc3_request, list);
66 }
67 
68 static inline void dwc3_gadget_move_started_request(struct dwc3_request *req)
69 {
70 	struct dwc3_ep		*dep = req->dep;
71 
72 	req->started = true;
73 	list_move_tail(&req->list, &dep->started_list);
74 }
75 
76 void dwc3_gadget_giveback(struct dwc3_ep *dep, struct dwc3_request *req,
77 		int status);
78 
79 void dwc3_ep0_interrupt(struct dwc3 *dwc,
80 		const struct dwc3_event_depevt *event);
81 void dwc3_ep0_out_start(struct dwc3 *dwc);
82 int __dwc3_gadget_ep0_set_halt(struct usb_ep *ep, int value);
83 int dwc3_gadget_ep0_set_halt(struct usb_ep *ep, int value);
84 int dwc3_gadget_ep0_queue(struct usb_ep *ep, struct usb_request *request,
85 		gfp_t gfp_flags);
86 int __dwc3_gadget_ep_set_halt(struct dwc3_ep *dep, int value, int protocol);
87 
88 /**
89  * dwc3_gadget_ep_get_transfer_index - Gets transfer index from HW
90  * @dwc: DesignWare USB3 Pointer
91  * @number: DWC endpoint number
92  *
93  * Caller should take care of locking
94  */
95 static inline u32 dwc3_gadget_ep_get_transfer_index(struct dwc3_ep *dep)
96 {
97 	u32			res_id;
98 
99 	res_id = dwc3_readl(dep->regs, DWC3_DEPCMD);
100 
101 	return DWC3_DEPCMD_GET_RSC_IDX(res_id);
102 }
103 
104 #endif /* __DRIVERS_USB_DWC3_GADGET_H */
105