-
Notifications
You must be signed in to change notification settings - Fork 40
/
raw_gadget.h
259 lines (225 loc) · 8.38 KB
/
raw_gadget.h
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
/*
* USB Raw Gadget driver.
*
* See Documentation/usb/raw-gadget.rst for more details.
*/
#ifndef _UAPI__LINUX_USB_RAW_GADGET_H
#define _UAPI__LINUX_USB_RAW_GADGET_H
#include <asm/ioctl.h>
#include <linux/types.h>
#include <linux/usb/ch9.h>
/* Maximum length of driver_name/device_name in the usb_raw_init struct. */
#define UDC_NAME_LENGTH_MAX 128
/*
* struct usb_raw_init - argument for USB_RAW_IOCTL_INIT ioctl.
* @speed: The speed of the emulated USB device, takes the same values as
* the usb_device_speed enum: USB_SPEED_FULL, USB_SPEED_HIGH, etc.
* @driver_name: The name of the UDC driver.
* @device_name: The name of a UDC instance.
*
* The last two fields identify a UDC the gadget driver should bind to.
* For example, Dummy UDC has "dummy_udc" as its driver_name and "dummy_udc.N"
* as its device_name, where N in the index of the Dummy UDC instance.
* At the same time the dwc2 driver that is used on Raspberry Pi Zero, has
* "20980000.usb" as both driver_name and device_name.
*/
struct usb_raw_init {
__u8 driver_name[UDC_NAME_LENGTH_MAX];
__u8 device_name[UDC_NAME_LENGTH_MAX];
__u8 speed;
};
/* The type of event fetched with the USB_RAW_IOCTL_EVENT_FETCH ioctl. */
enum usb_raw_event_type {
USB_RAW_EVENT_INVALID = 0,
/* This event is queued when the driver has bound to a UDC. */
USB_RAW_EVENT_CONNECT = 1,
/* This event is queued when a new control request arrived to ep0. */
USB_RAW_EVENT_CONTROL = 2,
/*
* These events are queued when the gadget driver is suspended,
* resumed, reset, or disconnected. Note that some UDCs (e.g. dwc2)
* report a disconnect event instead of a reset.
*/
USB_RAW_EVENT_SUSPEND = 3,
USB_RAW_EVENT_RESUME = 4,
USB_RAW_EVENT_RESET = 5,
USB_RAW_EVENT_DISCONNECT = 6,
/* The list might grow in the future. */
};
/*
* struct usb_raw_event - argument for USB_RAW_IOCTL_EVENT_FETCH ioctl.
* @type: The type of the fetched event.
* @length: Length of the data buffer. Updated by the driver and set to the
* actual length of the fetched event data.
* @data: A buffer to store the fetched event data.
*
* The fetched event data buffer contains struct usb_ctrlrequest for
* USB_RAW_EVENT_CONTROL and is empty for other events.
*/
struct usb_raw_event {
__u32 type;
__u32 length;
__u8 data[];
};
#define USB_RAW_IO_FLAGS_ZERO 0x0001
#define USB_RAW_IO_FLAGS_MASK 0x0001
static inline int usb_raw_io_flags_valid(__u16 flags)
{
return (flags & ~USB_RAW_IO_FLAGS_MASK) == 0;
}
static inline int usb_raw_io_flags_zero(__u16 flags)
{
return (flags & USB_RAW_IO_FLAGS_ZERO);
}
/*
* struct usb_raw_ep_io - argument for USB_RAW_IOCTL_EP0/EP_WRITE/READ ioctls.
* @ep: Endpoint handle as returned by USB_RAW_IOCTL_EP_ENABLE for
* USB_RAW_IOCTL_EP_WRITE/READ. Ignored for USB_RAW_IOCTL_EP0_WRITE/READ.
* @flags: When USB_RAW_IO_FLAGS_ZERO is specified, the zero flag is set on
* the submitted USB request, see include/linux/usb/gadget.h for details.
* @length: Length of data.
* @data: Data to send for USB_RAW_IOCTL_EP0/EP_WRITE. Buffer to store received
* data for USB_RAW_IOCTL_EP0/EP_READ.
*/
struct usb_raw_ep_io {
__u16 ep;
__u16 flags;
__u32 length;
__u8 data[];
};
/* Maximum number of non-control endpoints in struct usb_raw_eps_info. */
#define USB_RAW_EPS_NUM_MAX 30
/* Maximum length of UDC endpoint name in struct usb_raw_ep_info. */
#define USB_RAW_EP_NAME_MAX 16
/* Used as addr in struct usb_raw_ep_info if endpoint accepts any address. */
#define USB_RAW_EP_ADDR_ANY 0xff
/*
* struct usb_raw_ep_caps - exposes endpoint capabilities from struct usb_ep
* (technically from its member struct usb_ep_caps).
*/
struct usb_raw_ep_caps {
__u32 type_control : 1;
__u32 type_iso : 1;
__u32 type_bulk : 1;
__u32 type_int : 1;
__u32 dir_in : 1;
__u32 dir_out : 1;
};
/*
* struct usb_raw_ep_limits - exposes endpoint limits from struct usb_ep.
* @maxpacket_limit: Maximum packet size value supported by this endpoint.
* @max_streams: maximum number of streams supported by this endpoint
* (actual number is 2^n).
* @reserved: Empty, reserved for potential future extensions.
*/
struct usb_raw_ep_limits {
__u16 maxpacket_limit;
__u16 max_streams;
__u32 reserved;
};
/*
* struct usb_raw_ep_info - stores information about a gadget endpoint.
* @name: Name of the endpoint as it is defined in the UDC driver.
* @addr: Address of the endpoint that must be specified in the endpoint
* descriptor passed to USB_RAW_IOCTL_EP_ENABLE ioctl.
* @caps: Endpoint capabilities.
* @limits: Endpoint limits.
*/
struct usb_raw_ep_info {
__u8 name[USB_RAW_EP_NAME_MAX];
__u32 addr;
struct usb_raw_ep_caps caps;
struct usb_raw_ep_limits limits;
};
/*
* struct usb_raw_eps_info - argument for USB_RAW_IOCTL_EPS_INFO ioctl.
* eps: Structures that store information about non-control endpoints.
*/
struct usb_raw_eps_info {
struct usb_raw_ep_info eps[USB_RAW_EPS_NUM_MAX];
};
/*
* Initializes a Raw Gadget instance.
* Accepts a pointer to the usb_raw_init struct as an argument.
* Returns 0 on success or negative error code on failure.
*/
#define USB_RAW_IOCTL_INIT _IOW('U', 0, struct usb_raw_init)
/*
* Instructs Raw Gadget to bind to a UDC and start emulating a USB device.
* Returns 0 on success or negative error code on failure.
*/
#define USB_RAW_IOCTL_RUN _IO('U', 1)
/*
* A blocking ioctl that waits for an event and returns fetched event data to
* the user.
* Accepts a pointer to the usb_raw_event struct.
* Returns 0 on success or negative error code on failure.
*/
#define USB_RAW_IOCTL_EVENT_FETCH _IOR('U', 2, struct usb_raw_event)
/*
* Queues an IN (OUT for READ) request as a response to the last setup request
* received on endpoint 0 (provided that was an IN (OUT for READ) request), and
* waits until the request is completed. Copies received data to user for READ.
* Accepts a pointer to the usb_raw_ep_io struct as an argument.
* Returns length of transferred data on success or negative error code on
* failure.
*/
#define USB_RAW_IOCTL_EP0_WRITE _IOW('U', 3, struct usb_raw_ep_io)
#define USB_RAW_IOCTL_EP0_READ _IOWR('U', 4, struct usb_raw_ep_io)
/*
* Finds an endpoint that satisfies the parameters specified in the provided
* descriptors (address, transfer type, etc.) and enables it.
* Accepts a pointer to the usb_raw_ep_descs struct as an argument.
* Returns enabled endpoint handle on success or negative error code on failure.
*/
#define USB_RAW_IOCTL_EP_ENABLE _IOW('U', 5, struct usb_endpoint_descriptor)
/*
* Disables specified endpoint.
* Accepts endpoint handle as an argument.
* Returns 0 on success or negative error code on failure.
*/
#define USB_RAW_IOCTL_EP_DISABLE _IOW('U', 6, __u32)
/*
* Queues an IN (OUT for READ) request as a response to the last setup request
* received on endpoint usb_raw_ep_io.ep (provided that was an IN (OUT for READ)
* request), and waits until the request is completed. Copies received data to
* user for READ.
* Accepts a pointer to the usb_raw_ep_io struct as an argument.
* Returns length of transferred data on success or negative error code on
* failure.
*/
#define USB_RAW_IOCTL_EP_WRITE _IOW('U', 7, struct usb_raw_ep_io)
#define USB_RAW_IOCTL_EP_READ _IOWR('U', 8, struct usb_raw_ep_io)
/*
* Switches the gadget into the configured state.
* Returns 0 on success or negative error code on failure.
*/
#define USB_RAW_IOCTL_CONFIGURE _IO('U', 9)
/*
* Constrains UDC VBUS power usage.
* Accepts current limit in 2 mA units as an argument.
* Returns 0 on success or negative error code on failure.
*/
#define USB_RAW_IOCTL_VBUS_DRAW _IOW('U', 10, __u32)
/*
* Fills in the usb_raw_eps_info structure with information about non-control
* endpoints available for the currently connected UDC.
* Returns the number of available endpoints on success or negative error code
* on failure.
*/
#define USB_RAW_IOCTL_EPS_INFO _IOR('U', 11, struct usb_raw_eps_info)
/*
* Stalls a pending control request on endpoint 0.
* Returns 0 on success or negative error code on failure.
*/
#define USB_RAW_IOCTL_EP0_STALL _IO('U', 12)
/*
* Sets or clears halt or wedge status of the endpoint.
* Accepts endpoint handle as an argument.
* Returns 0 on success or negative error code on failure.
*/
#define USB_RAW_IOCTL_EP_SET_HALT _IOW('U', 13, __u32)
#define USB_RAW_IOCTL_EP_CLEAR_HALT _IOW('U', 14, __u32)
#define USB_RAW_IOCTL_EP_SET_WEDGE _IOW('U', 15, __u32)
#endif /* _UAPI__LINUX_USB_RAW_GADGET_H */