1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3  * linux/drivers/usb/gadget/s3c2410_udc.h
4  * Samsung on-chip full speed USB device controllers
5  *
6  * Copyright (C) 2004-2007 Herbert Pötzl - Arnaud Patard
7  *	Additional cleanups by Ben Dooks <ben-linux@fluff.org>
8  */
9 
10 #ifndef _S3C2410_UDC_H
11 #define _S3C2410_UDC_H
12 
13 struct s3c2410_ep {
14 	struct list_head		queue;
15 	unsigned long			last_io;	/* jiffies timestamp */
16 	struct usb_gadget		*gadget;
17 	struct s3c2410_udc		*dev;
18 	struct usb_ep			ep;
19 	u8				num;
20 
21 	unsigned short			fifo_size;
22 	u8				bEndpointAddress;
23 	u8				bmAttributes;
24 
25 	unsigned			halted : 1;
26 	unsigned			already_seen : 1;
27 	unsigned			setup_stage : 1;
28 };
29 
30 
31 /* Warning : ep0 has a fifo of 16 bytes */
32 /* Don't try to set 32 or 64            */
33 /* also testusb 14 fails  wit 16 but is */
34 /* fine with 8                          */
35 #define EP0_FIFO_SIZE		 8
36 #define EP_FIFO_SIZE		64
37 #define DEFAULT_POWER_STATE	0x00
38 
39 #define S3C2440_EP_FIFO_SIZE	128
40 
41 static const char ep0name [] = "ep0";
42 
43 static const char *const ep_name[] = {
44 	ep0name,                                /* everyone has ep0 */
45 	/* s3c2410 four bidirectional bulk endpoints */
46 	"ep1-bulk", "ep2-bulk", "ep3-bulk", "ep4-bulk",
47 };
48 
49 #define S3C2410_ENDPOINTS       ARRAY_SIZE(ep_name)
50 
51 struct s3c2410_request {
52 	struct list_head		queue;		/* ep's requests */
53 	struct usb_request		req;
54 };
55 
56 enum ep0_state {
57         EP0_IDLE,
58         EP0_IN_DATA_PHASE,
59         EP0_OUT_DATA_PHASE,
60         EP0_END_XFER,
61         EP0_STALL,
62 };
63 
64 static const char *ep0states[]= {
65         "EP0_IDLE",
66         "EP0_IN_DATA_PHASE",
67         "EP0_OUT_DATA_PHASE",
68         "EP0_END_XFER",
69         "EP0_STALL",
70 };
71 
72 struct s3c2410_udc {
73 	spinlock_t			lock;
74 
75 	struct s3c2410_ep		ep[S3C2410_ENDPOINTS];
76 	int				address;
77 	struct usb_gadget		gadget;
78 	struct usb_gadget_driver	*driver;
79 	struct s3c2410_request		fifo_req;
80 	u8				fifo_buf[EP_FIFO_SIZE];
81 	u16				devstatus;
82 
83 	u32				port_status;
84 	int				ep0state;
85 
86 	struct gpio_desc		*vbus_gpiod;
87 	struct gpio_desc		*pullup_gpiod;
88 
89 	unsigned			got_irq : 1;
90 
91 	unsigned			req_std : 1;
92 	unsigned			req_config : 1;
93 	unsigned			req_pending : 1;
94 	u8				vbus;
95 	int				irq;
96 };
97 #define to_s3c2410(g)	(container_of((g), struct s3c2410_udc, gadget))
98 
99 #endif
100