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5fd54ace | 1 | // SPDX-License-Identifier: GPL-2.0 |
1da177e4 | 2 | /* |
9454a57a | 3 | * <linux/usb/gadget.h> |
1da177e4 LT |
4 | * |
5 | * We call the USB code inside a Linux-based peripheral device a "gadget" | |
6 | * driver, except for the hardware-specific bus glue. One USB host can | |
7 | * master many USB gadgets, but the gadgets are only slaved to one host. | |
8 | * | |
9 | * | |
10 | * (C) Copyright 2002-2004 by David Brownell | |
11 | * All Rights Reserved. | |
12 | * | |
13 | * This software is licensed under the GNU GPL version 2. | |
14 | */ | |
15 | ||
16 | #ifndef __LINUX_USB_GADGET_H | |
17 | #define __LINUX_USB_GADGET_H | |
18 | ||
e9c23a25 SS |
19 | #include <linux/device.h> |
20 | #include <linux/errno.h> | |
21 | #include <linux/init.h> | |
22 | #include <linux/list.h> | |
5a0e3ad6 | 23 | #include <linux/slab.h> |
898c6086 | 24 | #include <linux/scatterlist.h> |
e9c23a25 | 25 | #include <linux/types.h> |
5702f753 | 26 | #include <linux/workqueue.h> |
325fd182 | 27 | #include <linux/usb/ch9.h> |
5a0e3ad6 | 28 | |
5e42d710 FB |
29 | #define UDC_TRACE_STR_MAX 512 |
30 | ||
1da177e4 LT |
31 | struct usb_ep; |
32 | ||
33 | /** | |
34 | * struct usb_request - describes one i/o request | |
35 | * @buf: Buffer used for data. Always provide this; some controllers | |
efc9052e | 36 | * only use PIO, or don't use DMA for some endpoints. |
1da177e4 | 37 | * @dma: DMA address corresponding to 'buf'. If you don't set this |
efc9052e DB |
38 | * field, and the usb controller needs one, it is responsible |
39 | * for mapping and unmapping the buffer. | |
898c6086 FB |
40 | * @sg: a scatterlist for SG-capable controllers. |
41 | * @num_sgs: number of SG entries | |
42 | * @num_mapped_sgs: number of SG entries mapped to DMA (internal) | |
1da177e4 | 43 | * @length: Length of that data |
a59d6b91 | 44 | * @stream_id: The stream id, when USB3.0 bulk streams are being used |
1da177e4 LT |
45 | * @no_interrupt: If true, hints that no completion irq is needed. |
46 | * Helpful sometimes with deep request queues that are handled | |
47 | * directly by DMA controllers. | |
48 | * @zero: If true, when writing data, makes the last packet be "short" | |
49 | * by adding a zero length packet as needed; | |
50 | * @short_not_ok: When reading data, makes short packets be | |
51 | * treated as errors (queue stops advancing till cleanup). | |
31fe084f | 52 | * @dma_mapped: Indicates if request has been mapped to DMA (internal) |
1da177e4 | 53 | * @complete: Function called when request completes, so this request and |
f579c2b4 AS |
54 | * its buffer may be re-used. The function will always be called with |
55 | * interrupts disabled, and it must not sleep. | |
1da177e4 LT |
56 | * Reads terminate with a short packet, or when the buffer fills, |
57 | * whichever comes first. When writes terminate, some data bytes | |
58 | * will usually still be in flight (often in a hardware fifo). | |
59 | * Errors (for reads or writes) stop the queue from advancing | |
60 | * until the completion function returns, so that any transfers | |
61 | * invalidated by the error may first be dequeued. | |
62 | * @context: For use by the completion callback | |
63 | * @list: For use by the gadget driver. | |
64 | * @status: Reports completion code, zero or a negative errno. | |
efc9052e DB |
65 | * Normally, faults block the transfer queue from advancing until |
66 | * the completion callback returns. | |
67 | * Code "-ESHUTDOWN" indicates completion caused by device disconnect, | |
68 | * or when the driver disabled the endpoint. | |
1da177e4 | 69 | * @actual: Reports bytes transferred to/from the buffer. For reads (OUT |
efc9052e DB |
70 | * transfers) this may be less than the requested length. If the |
71 | * short_not_ok flag is set, short reads are treated as errors | |
72 | * even when status otherwise indicates successful completion. | |
73 | * Note that for writes (IN transfers) some data bytes may still | |
74 | * reside in a device-side FIFO when the request is reported as | |
1da177e4 LT |
75 | * complete. |
76 | * | |
77 | * These are allocated/freed through the endpoint they're used with. The | |
78 | * hardware's driver can add extra per-request data to the memory it returns, | |
79 | * which often avoids separate memory allocations (potential failures), | |
80 | * later when the request is queued. | |
81 | * | |
82 | * Request flags affect request handling, such as whether a zero length | |
83 | * packet is written (the "zero" flag), whether a short read should be | |
84 | * treated as an error (blocking request queue advance, the "short_not_ok" | |
85 | * flag), or hinting that an interrupt is not required (the "no_interrupt" | |
86 | * flag, for use with deep request queues). | |
87 | * | |
88 | * Bulk endpoints can use any size buffers, and can also be used for interrupt | |
89 | * transfers. interrupt-only endpoints can be much less functional. | |
41dceed5 | 90 | * |
25985edc | 91 | * NOTE: this is analogous to 'struct urb' on the host side, except that |
41dceed5 | 92 | * it's thinner and promotes more pre-allocation. |
1da177e4 | 93 | */ |
1da177e4 LT |
94 | |
95 | struct usb_request { | |
96 | void *buf; | |
97 | unsigned length; | |
98 | dma_addr_t dma; | |
99 | ||
898c6086 FB |
100 | struct scatterlist *sg; |
101 | unsigned num_sgs; | |
102 | unsigned num_mapped_sgs; | |
103 | ||
a59d6b91 | 104 | unsigned stream_id:16; |
1da177e4 LT |
105 | unsigned no_interrupt:1; |
106 | unsigned zero:1; | |
107 | unsigned short_not_ok:1; | |
31fe084f | 108 | unsigned dma_mapped:1; |
1da177e4 LT |
109 | |
110 | void (*complete)(struct usb_ep *ep, | |
111 | struct usb_request *req); | |
112 | void *context; | |
113 | struct list_head list; | |
114 | ||
115 | int status; | |
116 | unsigned actual; | |
117 | }; | |
118 | ||
119 | /*-------------------------------------------------------------------------*/ | |
120 | ||
121 | /* endpoint-specific parts of the api to the usb controller hardware. | |
122 | * unlike the urb model, (de)multiplexing layers are not required. | |
123 | * (so this api could slash overhead if used on the host side...) | |
124 | * | |
125 | * note that device side usb controllers commonly differ in how many | |
126 | * endpoints they support, as well as their capabilities. | |
127 | */ | |
128 | struct usb_ep_ops { | |
129 | int (*enable) (struct usb_ep *ep, | |
130 | const struct usb_endpoint_descriptor *desc); | |
131 | int (*disable) (struct usb_ep *ep); | |
132 | ||
133 | struct usb_request *(*alloc_request) (struct usb_ep *ep, | |
55016f10 | 134 | gfp_t gfp_flags); |
1da177e4 LT |
135 | void (*free_request) (struct usb_ep *ep, struct usb_request *req); |
136 | ||
1da177e4 | 137 | int (*queue) (struct usb_ep *ep, struct usb_request *req, |
55016f10 | 138 | gfp_t gfp_flags); |
1da177e4 LT |
139 | int (*dequeue) (struct usb_ep *ep, struct usb_request *req); |
140 | ||
141 | int (*set_halt) (struct usb_ep *ep, int value); | |
a5e54b0d DL |
142 | int (*set_wedge) (struct usb_ep *ep); |
143 | ||
1da177e4 LT |
144 | int (*fifo_status) (struct usb_ep *ep); |
145 | void (*fifo_flush) (struct usb_ep *ep); | |
146 | }; | |
147 | ||
734b5a2a RB |
148 | /** |
149 | * struct usb_ep_caps - endpoint capabilities description | |
150 | * @type_control:Endpoint supports control type (reserved for ep0). | |
151 | * @type_iso:Endpoint supports isochronous transfers. | |
152 | * @type_bulk:Endpoint supports bulk transfers. | |
153 | * @type_int:Endpoint supports interrupt transfers. | |
154 | * @dir_in:Endpoint supports IN direction. | |
155 | * @dir_out:Endpoint supports OUT direction. | |
156 | */ | |
157 | struct usb_ep_caps { | |
158 | unsigned type_control:1; | |
159 | unsigned type_iso:1; | |
160 | unsigned type_bulk:1; | |
161 | unsigned type_int:1; | |
162 | unsigned dir_in:1; | |
163 | unsigned dir_out:1; | |
164 | }; | |
165 | ||
80e6e384 RB |
166 | #define USB_EP_CAPS_TYPE_CONTROL 0x01 |
167 | #define USB_EP_CAPS_TYPE_ISO 0x02 | |
168 | #define USB_EP_CAPS_TYPE_BULK 0x04 | |
169 | #define USB_EP_CAPS_TYPE_INT 0x08 | |
170 | #define USB_EP_CAPS_TYPE_ALL \ | |
171 | (USB_EP_CAPS_TYPE_ISO | USB_EP_CAPS_TYPE_BULK | USB_EP_CAPS_TYPE_INT) | |
172 | #define USB_EP_CAPS_DIR_IN 0x01 | |
173 | #define USB_EP_CAPS_DIR_OUT 0x02 | |
174 | #define USB_EP_CAPS_DIR_ALL (USB_EP_CAPS_DIR_IN | USB_EP_CAPS_DIR_OUT) | |
175 | ||
176 | #define USB_EP_CAPS(_type, _dir) \ | |
177 | { \ | |
178 | .type_control = !!(_type & USB_EP_CAPS_TYPE_CONTROL), \ | |
179 | .type_iso = !!(_type & USB_EP_CAPS_TYPE_ISO), \ | |
180 | .type_bulk = !!(_type & USB_EP_CAPS_TYPE_BULK), \ | |
181 | .type_int = !!(_type & USB_EP_CAPS_TYPE_INT), \ | |
182 | .dir_in = !!(_dir & USB_EP_CAPS_DIR_IN), \ | |
183 | .dir_out = !!(_dir & USB_EP_CAPS_DIR_OUT), \ | |
184 | } | |
185 | ||
1da177e4 LT |
186 | /** |
187 | * struct usb_ep - device side representation of USB endpoint | |
188 | * @name:identifier for the endpoint, such as "ep-a" or "ep9in-bulk" | |
189 | * @ops: Function pointers used to access hardware-specific operations. | |
190 | * @ep_list:the gadget's ep_list holds all of its endpoints | |
734b5a2a | 191 | * @caps:The structure describing types and directions supported by endoint. |
bbb1cc05 JC |
192 | * @enabled: The current endpoint enabled/disabled state. |
193 | * @claimed: True if this endpoint is claimed by a function. | |
1da177e4 LT |
194 | * @maxpacket:The maximum packet size used on this endpoint. The initial |
195 | * value can sometimes be reduced (hardware allowing), according to | |
0cb30062 | 196 | * the endpoint descriptor used to configure the endpoint. |
e117e742 RB |
197 | * @maxpacket_limit:The maximum packet size value which can be handled by this |
198 | * endpoint. It's set once by UDC driver when endpoint is initialized, and | |
199 | * should not be changed. Should not be confused with maxpacket. | |
a59d6b91 TB |
200 | * @max_streams: The maximum number of streams supported |
201 | * by this EP (0 - 16, actual number is 2^n) | |
bdb64d72 TB |
202 | * @mult: multiplier, 'mult' value for SS Isoc EPs |
203 | * @maxburst: the maximum number of bursts supported by this EP (for usb3) | |
72c973dd | 204 | * @driver_data:for use by the gadget driver. |
48767a4e TB |
205 | * @address: used to identify the endpoint when finding descriptor that |
206 | * matches connection speed | |
72c973dd TB |
207 | * @desc: endpoint descriptor. This pointer is set before the endpoint is |
208 | * enabled and remains valid until the endpoint is disabled. | |
a59d6b91 TB |
209 | * @comp_desc: In case of SuperSpeed support, this is the endpoint companion |
210 | * descriptor that is used to configure the endpoint | |
1da177e4 LT |
211 | * |
212 | * the bus controller driver lists all the general purpose endpoints in | |
213 | * gadget->ep_list. the control endpoint (gadget->ep0) is not in that list, | |
214 | * and is accessed only in response to a driver setup() callback. | |
215 | */ | |
734b5a2a | 216 | |
1da177e4 LT |
217 | struct usb_ep { |
218 | void *driver_data; | |
219 | ||
220 | const char *name; | |
221 | const struct usb_ep_ops *ops; | |
222 | struct list_head ep_list; | |
734b5a2a | 223 | struct usb_ep_caps caps; |
cc476b42 | 224 | bool claimed; |
b0bac258 | 225 | bool enabled; |
1da177e4 | 226 | unsigned maxpacket:16; |
e117e742 | 227 | unsigned maxpacket_limit:16; |
a59d6b91 | 228 | unsigned max_streams:16; |
bdb64d72 | 229 | unsigned mult:2; |
a7250db3 | 230 | unsigned maxburst:5; |
48767a4e | 231 | u8 address; |
72c973dd | 232 | const struct usb_endpoint_descriptor *desc; |
a59d6b91 | 233 | const struct usb_ss_ep_comp_descriptor *comp_desc; |
1da177e4 LT |
234 | }; |
235 | ||
236 | /*-------------------------------------------------------------------------*/ | |
237 | ||
5a8d651a FB |
238 | #if IS_ENABLED(CONFIG_USB_GADGET) |
239 | void usb_ep_set_maxpacket_limit(struct usb_ep *ep, unsigned maxpacket_limit); | |
240 | int usb_ep_enable(struct usb_ep *ep); | |
241 | int usb_ep_disable(struct usb_ep *ep); | |
242 | struct usb_request *usb_ep_alloc_request(struct usb_ep *ep, gfp_t gfp_flags); | |
243 | void usb_ep_free_request(struct usb_ep *ep, struct usb_request *req); | |
244 | int usb_ep_queue(struct usb_ep *ep, struct usb_request *req, gfp_t gfp_flags); | |
245 | int usb_ep_dequeue(struct usb_ep *ep, struct usb_request *req); | |
246 | int usb_ep_set_halt(struct usb_ep *ep); | |
247 | int usb_ep_clear_halt(struct usb_ep *ep); | |
248 | int usb_ep_set_wedge(struct usb_ep *ep); | |
249 | int usb_ep_fifo_status(struct usb_ep *ep); | |
250 | void usb_ep_fifo_flush(struct usb_ep *ep); | |
251 | #else | |
e117e742 | 252 | static inline void usb_ep_set_maxpacket_limit(struct usb_ep *ep, |
5a8d651a FB |
253 | unsigned maxpacket_limit) |
254 | { } | |
72c973dd | 255 | static inline int usb_ep_enable(struct usb_ep *ep) |
5a8d651a | 256 | { return 0; } |
41dceed5 | 257 | static inline int usb_ep_disable(struct usb_ep *ep) |
5a8d651a | 258 | { return 0; } |
41dceed5 | 259 | static inline struct usb_request *usb_ep_alloc_request(struct usb_ep *ep, |
5a8d651a FB |
260 | gfp_t gfp_flags) |
261 | { return NULL; } | |
41dceed5 | 262 | static inline void usb_ep_free_request(struct usb_ep *ep, |
5a8d651a FB |
263 | struct usb_request *req) |
264 | { } | |
265 | static inline int usb_ep_queue(struct usb_ep *ep, struct usb_request *req, | |
266 | gfp_t gfp_flags) | |
267 | { return 0; } | |
41dceed5 | 268 | static inline int usb_ep_dequeue(struct usb_ep *ep, struct usb_request *req) |
5a8d651a | 269 | { return 0; } |
41dceed5 | 270 | static inline int usb_ep_set_halt(struct usb_ep *ep) |
5a8d651a | 271 | { return 0; } |
41dceed5 | 272 | static inline int usb_ep_clear_halt(struct usb_ep *ep) |
5a8d651a FB |
273 | { return 0; } |
274 | static inline int usb_ep_set_wedge(struct usb_ep *ep) | |
275 | { return 0; } | |
41dceed5 | 276 | static inline int usb_ep_fifo_status(struct usb_ep *ep) |
5a8d651a | 277 | { return 0; } |
41dceed5 | 278 | static inline void usb_ep_fifo_flush(struct usb_ep *ep) |
5a8d651a FB |
279 | { } |
280 | #endif /* USB_GADGET */ | |
1da177e4 LT |
281 | |
282 | /*-------------------------------------------------------------------------*/ | |
283 | ||
bdb64d72 TB |
284 | struct usb_dcd_config_params { |
285 | __u8 bU1devExitLat; /* U1 Device exit Latency */ | |
089b837a | 286 | #define USB_DEFAULT_U1_DEV_EXIT_LAT 0x01 /* Less then 1 microsec */ |
bdb64d72 | 287 | __le16 bU2DevExitLat; /* U2 Device exit Latency */ |
089b837a | 288 | #define USB_DEFAULT_U2_DEV_EXIT_LAT 0x1F4 /* Less then 500 microsec */ |
bdb64d72 TB |
289 | }; |
290 | ||
291 | ||
1da177e4 | 292 | struct usb_gadget; |
2ccea03a | 293 | struct usb_gadget_driver; |
dfea9c94 | 294 | struct usb_udc; |
1da177e4 LT |
295 | |
296 | /* the rest of the api to the controller hardware: device operations, | |
297 | * which don't involve endpoints (or i/o). | |
298 | */ | |
299 | struct usb_gadget_ops { | |
300 | int (*get_frame)(struct usb_gadget *); | |
301 | int (*wakeup)(struct usb_gadget *); | |
302 | int (*set_selfpowered) (struct usb_gadget *, int is_selfpowered); | |
303 | int (*vbus_session) (struct usb_gadget *, int is_active); | |
304 | int (*vbus_draw) (struct usb_gadget *, unsigned mA); | |
305 | int (*pullup) (struct usb_gadget *, int is_on); | |
306 | int (*ioctl)(struct usb_gadget *, | |
307 | unsigned code, unsigned long param); | |
bdb64d72 | 308 | void (*get_config_params)(struct usb_dcd_config_params *); |
352c2dc8 SAS |
309 | int (*udc_start)(struct usb_gadget *, |
310 | struct usb_gadget_driver *); | |
22835b80 | 311 | int (*udc_stop)(struct usb_gadget *); |
67fdfda4 | 312 | void (*udc_set_speed)(struct usb_gadget *, enum usb_device_speed); |
596c154d RB |
313 | struct usb_ep *(*match_ep)(struct usb_gadget *, |
314 | struct usb_endpoint_descriptor *, | |
315 | struct usb_ss_ep_comp_descriptor *); | |
1da177e4 LT |
316 | }; |
317 | ||
318 | /** | |
319 | * struct usb_gadget - represents a usb slave device | |
5702f753 | 320 | * @work: (internal use) Workqueue to be used for sysfs_notify() |
dfea9c94 | 321 | * @udc: struct usb_udc pointer for this gadget |
1da177e4 LT |
322 | * @ops: Function pointers used to access hardware-specific operations. |
323 | * @ep0: Endpoint zero, used when reading or writing responses to | |
efc9052e | 324 | * driver setup() requests |
1da177e4 LT |
325 | * @ep_list: List of other endpoints supported by the device. |
326 | * @speed: Speed of current connection to USB host. | |
d327ab5b MN |
327 | * @max_speed: Maximal speed the UDC can handle. UDC must support this |
328 | * and all slower speeds. | |
49401f41 | 329 | * @state: the state we are now (attached, suspended, configured, etc) |
d8318d7f DC |
330 | * @name: Identifies the controller hardware type. Used in diagnostics |
331 | * and sometimes configuration. | |
332 | * @dev: Driver model state for this abstract device. | |
333 | * @out_epnum: last used out ep number | |
334 | * @in_epnum: last used in ep number | |
5e42d710 | 335 | * @mA: last set mA value |
84704bb3 | 336 | * @otg_caps: OTG capabilities of this gadget. |
898c6086 | 337 | * @sg_supported: true if we can handle scatter-gather |
1da177e4 LT |
338 | * @is_otg: True if the USB device port uses a Mini-AB jack, so that the |
339 | * gadget driver must provide a USB OTG descriptor. | |
340 | * @is_a_peripheral: False unless is_otg, the "A" end of a USB cable | |
341 | * is in the Mini-AB jack, and HNP has been used to switch roles | |
342 | * so that the "A" device currently acts as A-Peripheral, not A-Host. | |
343 | * @a_hnp_support: OTG device feature flag, indicating that the A-Host | |
344 | * supports HNP at this port. | |
345 | * @a_alt_hnp_support: OTG device feature flag, indicating that the A-Host | |
346 | * only supports HNP on a different root port. | |
347 | * @b_hnp_enable: OTG device feature flag, indicating that the A-Host | |
348 | * enabled HNP support. | |
75a9c82a LJ |
349 | * @hnp_polling_support: OTG device feature flag, indicating if the OTG device |
350 | * in peripheral mode can support HNP polling. | |
351 | * @host_request_flag: OTG device feature flag, indicating if A-Peripheral | |
352 | * or B-Peripheral wants to take host role. | |
0b2d2bba DC |
353 | * @quirk_ep_out_aligned_size: epout requires buffer size to be aligned to |
354 | * MaxPacketSize. | |
bbb1cc05 JC |
355 | * @quirk_altset_not_supp: UDC controller doesn't support alt settings. |
356 | * @quirk_stall_not_supp: UDC controller doesn't support stalling. | |
357 | * @quirk_zlp_not_supp: UDC controller doesn't support ZLP. | |
60e7396f YS |
358 | * @quirk_avoids_skb_reserve: udc/platform wants to avoid skb_reserve() in |
359 | * u_ether.c to improve performance. | |
80b2502c | 360 | * @is_selfpowered: if the gadget is self-powered. |
ccdf138f RB |
361 | * @deactivated: True if gadget is deactivated - in deactivated state it cannot |
362 | * be connected. | |
363 | * @connected: True if gadget is connected. | |
a9548c55 JY |
364 | * @lpm_capable: If the gadget max_speed is FULL or HIGH, this flag |
365 | * indicates that it supports LPM as per the LPM ECN & errata. | |
1da177e4 LT |
366 | * |
367 | * Gadgets have a mostly-portable "gadget driver" implementing device | |
368 | * functions, handling all usb configurations and interfaces. Gadget | |
369 | * drivers talk to hardware-specific code indirectly, through ops vectors. | |
370 | * That insulates the gadget driver from hardware details, and packages | |
371 | * the hardware endpoints through generic i/o queues. The "usb_gadget" | |
372 | * and "usb_ep" interfaces provide that insulation from the hardware. | |
373 | * | |
374 | * Except for the driver data, all fields in this structure are | |
375 | * read-only to the gadget driver. That driver data is part of the | |
376 | * "driver model" infrastructure in 2.6 (and later) kernels, and for | |
377 | * earlier systems is grouped in a similar structure that's not known | |
378 | * to the rest of the kernel. | |
379 | * | |
380 | * Values of the three OTG device feature flags are updated before the | |
381 | * setup() call corresponding to USB_REQ_SET_CONFIGURATION, and before | |
382 | * driver suspend() calls. They are valid only when is_otg, and when the | |
383 | * device is acting as a B-Peripheral (so is_a_peripheral is false). | |
384 | */ | |
385 | struct usb_gadget { | |
5702f753 | 386 | struct work_struct work; |
dfea9c94 | 387 | struct usb_udc *udc; |
1da177e4 LT |
388 | /* readonly to gadget driver */ |
389 | const struct usb_gadget_ops *ops; | |
390 | struct usb_ep *ep0; | |
391 | struct list_head ep_list; /* of usb_ep */ | |
392 | enum usb_device_speed speed; | |
d327ab5b | 393 | enum usb_device_speed max_speed; |
49401f41 | 394 | enum usb_device_state state; |
d8318d7f DC |
395 | const char *name; |
396 | struct device dev; | |
397 | unsigned out_epnum; | |
398 | unsigned in_epnum; | |
5e42d710 | 399 | unsigned mA; |
84704bb3 | 400 | struct usb_otg_caps *otg_caps; |
d8318d7f | 401 | |
898c6086 | 402 | unsigned sg_supported:1; |
1da177e4 LT |
403 | unsigned is_otg:1; |
404 | unsigned is_a_peripheral:1; | |
405 | unsigned b_hnp_enable:1; | |
406 | unsigned a_hnp_support:1; | |
407 | unsigned a_alt_hnp_support:1; | |
75a9c82a LJ |
408 | unsigned hnp_polling_support:1; |
409 | unsigned host_request_flag:1; | |
0b2d2bba | 410 | unsigned quirk_ep_out_aligned_size:1; |
ffd9a0fc | 411 | unsigned quirk_altset_not_supp:1; |
02ded1b0 | 412 | unsigned quirk_stall_not_supp:1; |
ca1023c8 | 413 | unsigned quirk_zlp_not_supp:1; |
60e7396f | 414 | unsigned quirk_avoids_skb_reserve:1; |
80b2502c | 415 | unsigned is_selfpowered:1; |
ccdf138f RB |
416 | unsigned deactivated:1; |
417 | unsigned connected:1; | |
a9548c55 | 418 | unsigned lpm_capable:1; |
1da177e4 | 419 | }; |
5702f753 | 420 | #define work_to_gadget(w) (container_of((w), struct usb_gadget, work)) |
1da177e4 | 421 | |
41dceed5 GKH |
422 | static inline void set_gadget_data(struct usb_gadget *gadget, void *data) |
423 | { dev_set_drvdata(&gadget->dev, data); } | |
424 | static inline void *get_gadget_data(struct usb_gadget *gadget) | |
425 | { return dev_get_drvdata(&gadget->dev); } | |
f48cf80f FC |
426 | static inline struct usb_gadget *dev_to_usb_gadget(struct device *dev) |
427 | { | |
428 | return container_of(dev, struct usb_gadget, dev); | |
429 | } | |
1da177e4 LT |
430 | |
431 | /* iterates the non-control endpoints; 'tmp' is a struct usb_ep pointer */ | |
0858a3a5 | 432 | #define gadget_for_each_ep(tmp, gadget) \ |
1da177e4 LT |
433 | list_for_each_entry(tmp, &(gadget)->ep_list, ep_list) |
434 | ||
16b114a6 FT |
435 | /** |
436 | * usb_ep_align - returns @len aligned to ep's maxpacketsize. | |
437 | * @ep: the endpoint whose maxpacketsize is used to align @len | |
438 | * @len: buffer size's length to align to @ep's maxpacketsize | |
439 | * | |
440 | * This helper is used to align buffer's size to an ep's maxpacketsize. | |
441 | */ | |
442 | static inline size_t usb_ep_align(struct usb_ep *ep, size_t len) | |
443 | { | |
982555fc PC |
444 | int max_packet_size = (size_t)usb_endpoint_maxp(ep->desc) & 0x7ff; |
445 | ||
446 | return round_up(len, max_packet_size); | |
16b114a6 FT |
447 | } |
448 | ||
0b2d2bba DC |
449 | /** |
450 | * usb_ep_align_maybe - returns @len aligned to ep's maxpacketsize if gadget | |
16b114a6 | 451 | * requires quirk_ep_out_aligned_size, otherwise returns len. |
0b2d2bba DC |
452 | * @g: controller to check for quirk |
453 | * @ep: the endpoint whose maxpacketsize is used to align @len | |
454 | * @len: buffer size's length to align to @ep's maxpacketsize | |
455 | * | |
456 | * This helper is used in case it's required for any reason to check and maybe | |
457 | * align buffer's size to an ep's maxpacketsize. | |
458 | */ | |
459 | static inline size_t | |
460 | usb_ep_align_maybe(struct usb_gadget *g, struct usb_ep *ep, size_t len) | |
461 | { | |
16b114a6 | 462 | return g->quirk_ep_out_aligned_size ? usb_ep_align(ep, len) : len; |
0b2d2bba DC |
463 | } |
464 | ||
ffd9a0fc RB |
465 | /** |
466 | * gadget_is_altset_supported - return true iff the hardware supports | |
467 | * altsettings | |
468 | * @g: controller to check for quirk | |
469 | */ | |
470 | static inline int gadget_is_altset_supported(struct usb_gadget *g) | |
471 | { | |
472 | return !g->quirk_altset_not_supp; | |
473 | } | |
474 | ||
02ded1b0 RB |
475 | /** |
476 | * gadget_is_stall_supported - return true iff the hardware supports stalling | |
477 | * @g: controller to check for quirk | |
478 | */ | |
479 | static inline int gadget_is_stall_supported(struct usb_gadget *g) | |
480 | { | |
481 | return !g->quirk_stall_not_supp; | |
482 | } | |
483 | ||
ca1023c8 RB |
484 | /** |
485 | * gadget_is_zlp_supported - return true iff the hardware supports zlp | |
486 | * @g: controller to check for quirk | |
487 | */ | |
488 | static inline int gadget_is_zlp_supported(struct usb_gadget *g) | |
489 | { | |
490 | return !g->quirk_zlp_not_supp; | |
491 | } | |
492 | ||
60e7396f YS |
493 | /** |
494 | * gadget_avoids_skb_reserve - return true iff the hardware would like to avoid | |
495 | * skb_reserve to improve performance. | |
496 | * @g: controller to check for quirk | |
497 | */ | |
498 | static inline int gadget_avoids_skb_reserve(struct usb_gadget *g) | |
499 | { | |
500 | return g->quirk_avoids_skb_reserve; | |
501 | } | |
502 | ||
a4e3ef55 DB |
503 | /** |
504 | * gadget_is_dualspeed - return true iff the hardware handles high speed | |
fd39c86b | 505 | * @g: controller that might support both high and full speeds |
a4e3ef55 DB |
506 | */ |
507 | static inline int gadget_is_dualspeed(struct usb_gadget *g) | |
508 | { | |
85b8614d | 509 | return g->max_speed >= USB_SPEED_HIGH; |
a4e3ef55 DB |
510 | } |
511 | ||
bdb64d72 | 512 | /** |
de97f250 RD |
513 | * gadget_is_superspeed() - return true if the hardware handles superspeed |
514 | * @g: controller that might support superspeed | |
bdb64d72 TB |
515 | */ |
516 | static inline int gadget_is_superspeed(struct usb_gadget *g) | |
517 | { | |
85b8614d | 518 | return g->max_speed >= USB_SPEED_SUPER; |
bdb64d72 TB |
519 | } |
520 | ||
1ca1b6a6 JY |
521 | /** |
522 | * gadget_is_superspeed_plus() - return true if the hardware handles | |
523 | * superspeed plus | |
524 | * @g: controller that might support superspeed plus | |
525 | */ | |
526 | static inline int gadget_is_superspeed_plus(struct usb_gadget *g) | |
527 | { | |
528 | return g->max_speed >= USB_SPEED_SUPER_PLUS; | |
529 | } | |
530 | ||
a4e3ef55 DB |
531 | /** |
532 | * gadget_is_otg - return true iff the hardware is OTG-ready | |
fd39c86b | 533 | * @g: controller that might have a Mini-AB connector |
a4e3ef55 DB |
534 | * |
535 | * This is a runtime test, since kernels with a USB-OTG stack sometimes | |
536 | * run on boards which only have a Mini-B (or Mini-A) connector. | |
537 | */ | |
538 | static inline int gadget_is_otg(struct usb_gadget *g) | |
539 | { | |
540 | #ifdef CONFIG_USB_OTG | |
541 | return g->is_otg; | |
542 | #else | |
543 | return 0; | |
544 | #endif | |
545 | } | |
546 | ||
5a8d651a | 547 | /*-------------------------------------------------------------------------*/ |
1da177e4 | 548 | |
5a8d651a FB |
549 | #if IS_ENABLED(CONFIG_USB_GADGET) |
550 | int usb_gadget_frame_number(struct usb_gadget *gadget); | |
551 | int usb_gadget_wakeup(struct usb_gadget *gadget); | |
552 | int usb_gadget_set_selfpowered(struct usb_gadget *gadget); | |
553 | int usb_gadget_clear_selfpowered(struct usb_gadget *gadget); | |
554 | int usb_gadget_vbus_connect(struct usb_gadget *gadget); | |
555 | int usb_gadget_vbus_draw(struct usb_gadget *gadget, unsigned mA); | |
556 | int usb_gadget_vbus_disconnect(struct usb_gadget *gadget); | |
557 | int usb_gadget_connect(struct usb_gadget *gadget); | |
558 | int usb_gadget_disconnect(struct usb_gadget *gadget); | |
559 | int usb_gadget_deactivate(struct usb_gadget *gadget); | |
560 | int usb_gadget_activate(struct usb_gadget *gadget); | |
561 | #else | |
562 | static inline int usb_gadget_frame_number(struct usb_gadget *gadget) | |
563 | { return 0; } | |
41dceed5 | 564 | static inline int usb_gadget_wakeup(struct usb_gadget *gadget) |
5a8d651a | 565 | { return 0; } |
41dceed5 | 566 | static inline int usb_gadget_set_selfpowered(struct usb_gadget *gadget) |
5a8d651a | 567 | { return 0; } |
41dceed5 | 568 | static inline int usb_gadget_clear_selfpowered(struct usb_gadget *gadget) |
5a8d651a | 569 | { return 0; } |
41dceed5 | 570 | static inline int usb_gadget_vbus_connect(struct usb_gadget *gadget) |
5a8d651a | 571 | { return 0; } |
41dceed5 | 572 | static inline int usb_gadget_vbus_draw(struct usb_gadget *gadget, unsigned mA) |
5a8d651a | 573 | { return 0; } |
41dceed5 | 574 | static inline int usb_gadget_vbus_disconnect(struct usb_gadget *gadget) |
5a8d651a | 575 | { return 0; } |
41dceed5 | 576 | static inline int usb_gadget_connect(struct usb_gadget *gadget) |
5a8d651a | 577 | { return 0; } |
ccdf138f | 578 | static inline int usb_gadget_disconnect(struct usb_gadget *gadget) |
5a8d651a | 579 | { return 0; } |
ccdf138f | 580 | static inline int usb_gadget_deactivate(struct usb_gadget *gadget) |
5a8d651a | 581 | { return 0; } |
ccdf138f | 582 | static inline int usb_gadget_activate(struct usb_gadget *gadget) |
5a8d651a FB |
583 | { return 0; } |
584 | #endif /* CONFIG_USB_GADGET */ | |
1da177e4 | 585 | |
1da177e4 LT |
586 | /*-------------------------------------------------------------------------*/ |
587 | ||
588 | /** | |
589 | * struct usb_gadget_driver - driver for usb 'slave' devices | |
590 | * @function: String describing the gadget's function | |
7177aed4 | 591 | * @max_speed: Highest speed the driver handles. |
1da177e4 | 592 | * @setup: Invoked for ep0 control requests that aren't handled by |
efc9052e DB |
593 | * the hardware level driver. Most calls must be handled by |
594 | * the gadget driver, including descriptor and configuration | |
595 | * management. The 16 bit members of the setup data are in | |
596 | * USB byte order. Called in_interrupt; this may not sleep. Driver | |
1da177e4 LT |
597 | * queues a response to ep0, or returns negative to stall. |
598 | * @disconnect: Invoked after all transfers have been stopped, | |
efc9052e DB |
599 | * when the host is disconnected. May be called in_interrupt; this |
600 | * may not sleep. Some devices can't detect disconnect, so this might | |
1da177e4 | 601 | * not be called except as part of controller shutdown. |
93952956 | 602 | * @bind: the driver's bind callback |
1da177e4 | 603 | * @unbind: Invoked when the driver is unbound from a gadget, |
efc9052e DB |
604 | * usually from rmmod (after a disconnect is reported). |
605 | * Called in a context that permits sleeping. | |
1da177e4 LT |
606 | * @suspend: Invoked on USB suspend. May be called in_interrupt. |
607 | * @resume: Invoked on USB resume. May be called in_interrupt. | |
ef979a26 PC |
608 | * @reset: Invoked on USB bus reset. It is mandatory for all gadget drivers |
609 | * and should be called in_interrupt. | |
1da177e4 | 610 | * @driver: Driver model state for this driver. |
2284b29d RB |
611 | * @udc_name: A name of UDC this driver should be bound to. If udc_name is NULL, |
612 | * this driver will be bound to any available UDC. | |
855ed04a | 613 | * @pending: UDC core private data used for deferred probe of this driver. |
f1bddbb3 KO |
614 | * @match_existing_only: If udc is not found, return an error and don't add this |
615 | * gadget driver to list of pending driver | |
1da177e4 LT |
616 | * |
617 | * Devices are disabled till a gadget driver successfully bind()s, which | |
618 | * means the driver will handle setup() requests needed to enumerate (and | |
619 | * meet "chapter 9" requirements) then do some useful work. | |
620 | * | |
621 | * If gadget->is_otg is true, the gadget driver must provide an OTG | |
622 | * descriptor during enumeration, or else fail the bind() call. In such | |
623 | * cases, no USB traffic may flow until both bind() returns without | |
624 | * having called usb_gadget_disconnect(), and the USB host stack has | |
625 | * initialized. | |
626 | * | |
627 | * Drivers use hardware-specific knowledge to configure the usb hardware. | |
628 | * endpoint addressing is only one of several hardware characteristics that | |
629 | * are in descriptors the ep0 implementation returns from setup() calls. | |
630 | * | |
631 | * Except for ep0 implementation, most driver code shouldn't need change to | |
632 | * run on top of different usb controllers. It'll use endpoints set up by | |
633 | * that ep0 implementation. | |
634 | * | |
635 | * The usb controller driver handles a few standard usb requests. Those | |
636 | * include set_address, and feature flags for devices, interfaces, and | |
637 | * endpoints (the get_status, set_feature, and clear_feature requests). | |
638 | * | |
639 | * Accordingly, the driver's setup() callback must always implement all | |
640 | * get_descriptor requests, returning at least a device descriptor and | |
641 | * a configuration descriptor. Drivers must make sure the endpoint | |
642 | * descriptors match any hardware constraints. Some hardware also constrains | |
643 | * other descriptors. (The pxa250 allows only configurations 1, 2, or 3). | |
644 | * | |
645 | * The driver's setup() callback must also implement set_configuration, | |
646 | * and should also implement set_interface, get_configuration, and | |
647 | * get_interface. Setting a configuration (or interface) is where | |
648 | * endpoints should be activated or (config 0) shut down. | |
649 | * | |
650 | * (Note that only the default control endpoint is supported. Neither | |
651 | * hosts nor devices generally support control traffic except to ep0.) | |
652 | * | |
653 | * Most devices will ignore USB suspend/resume operations, and so will | |
654 | * not provide those callbacks. However, some may need to change modes | |
655 | * when the host is not longer directing those activities. For example, | |
656 | * local controls (buttons, dials, etc) may need to be re-enabled since | |
657 | * the (remote) host can't do that any longer; or an error state might | |
658 | * be cleared, to make the device behave identically whether or not | |
659 | * power is maintained. | |
660 | */ | |
661 | struct usb_gadget_driver { | |
662 | char *function; | |
7177aed4 | 663 | enum usb_device_speed max_speed; |
ffe0b335 SAS |
664 | int (*bind)(struct usb_gadget *gadget, |
665 | struct usb_gadget_driver *driver); | |
1da177e4 LT |
666 | void (*unbind)(struct usb_gadget *); |
667 | int (*setup)(struct usb_gadget *, | |
668 | const struct usb_ctrlrequest *); | |
669 | void (*disconnect)(struct usb_gadget *); | |
670 | void (*suspend)(struct usb_gadget *); | |
671 | void (*resume)(struct usb_gadget *); | |
ef979a26 | 672 | void (*reset)(struct usb_gadget *); |
1da177e4 | 673 | |
41dceed5 | 674 | /* FIXME support safe rmmod */ |
1da177e4 | 675 | struct device_driver driver; |
2284b29d RB |
676 | |
677 | char *udc_name; | |
855ed04a | 678 | struct list_head pending; |
f1bddbb3 | 679 | unsigned match_existing_only:1; |
1da177e4 LT |
680 | }; |
681 | ||
682 | ||
683 | ||
684 | /*-------------------------------------------------------------------------*/ | |
685 | ||
686 | /* driver modules register and unregister, as usual. | |
687 | * these calls must be made in a context that can sleep. | |
688 | * | |
689 | * these will usually be implemented directly by the hardware-dependent | |
690 | * usb bus interface driver, which will only support a single driver. | |
691 | */ | |
692 | ||
693 | /** | |
b0fca50f UKK |
694 | * usb_gadget_probe_driver - probe a gadget driver |
695 | * @driver: the driver being registered | |
c2344f13 | 696 | * Context: can sleep |
1da177e4 LT |
697 | * |
698 | * Call this in your gadget driver's module initialization function, | |
699 | * to tell the underlying usb controller driver about your driver. | |
b0fca50f UKK |
700 | * The @bind() function will be called to bind it to a gadget before this |
701 | * registration call returns. It's expected that the @bind() function will | |
702 | * be in init sections. | |
1da177e4 | 703 | */ |
93952956 | 704 | int usb_gadget_probe_driver(struct usb_gadget_driver *driver); |
1da177e4 LT |
705 | |
706 | /** | |
707 | * usb_gadget_unregister_driver - unregister a gadget driver | |
708 | * @driver:the driver being unregistered | |
c2344f13 | 709 | * Context: can sleep |
1da177e4 LT |
710 | * |
711 | * Call this in your gadget driver's module cleanup function, | |
712 | * to tell the underlying usb controller that your driver is | |
713 | * going away. If the controller is connected to a USB host, | |
714 | * it will first disconnect(). The driver is also requested | |
715 | * to unbind() and clean up any device state, before this procedure | |
329af28b DB |
716 | * finally returns. It's expected that the unbind() functions |
717 | * will in in exit sections, so may not be linked in some kernels. | |
1da177e4 | 718 | */ |
41dceed5 | 719 | int usb_gadget_unregister_driver(struct usb_gadget_driver *driver); |
1da177e4 | 720 | |
792bfcf7 FB |
721 | extern int usb_add_gadget_udc_release(struct device *parent, |
722 | struct usb_gadget *gadget, void (*release)(struct device *dev)); | |
2ccea03a FB |
723 | extern int usb_add_gadget_udc(struct device *parent, struct usb_gadget *gadget); |
724 | extern void usb_del_gadget_udc(struct usb_gadget *gadget); | |
175f7121 | 725 | extern char *usb_get_gadget_udc_name(void); |
2ccea03a | 726 | |
1da177e4 LT |
727 | /*-------------------------------------------------------------------------*/ |
728 | ||
729 | /* utility to simplify dealing with string descriptors */ | |
730 | ||
731 | /** | |
732 | * struct usb_string - wraps a C string and its USB id | |
733 | * @id:the (nonzero) ID for this string | |
734 | * @s:the string, in UTF-8 encoding | |
735 | * | |
736 | * If you're using usb_gadget_get_string(), use this to wrap a string | |
737 | * together with its ID. | |
738 | */ | |
739 | struct usb_string { | |
740 | u8 id; | |
741 | const char *s; | |
742 | }; | |
743 | ||
744 | /** | |
745 | * struct usb_gadget_strings - a set of USB strings in a given language | |
746 | * @language:identifies the strings' language (0x0409 for en-us) | |
747 | * @strings:array of strings with their ids | |
748 | * | |
749 | * If you're using usb_gadget_get_string(), use this to wrap all the | |
750 | * strings for a given language. | |
751 | */ | |
752 | struct usb_gadget_strings { | |
753 | u16 language; /* 0x0409 for en-us */ | |
754 | struct usb_string *strings; | |
755 | }; | |
756 | ||
9bb2859f SAS |
757 | struct usb_gadget_string_container { |
758 | struct list_head list; | |
759 | u8 *stash[0]; | |
760 | }; | |
761 | ||
1da177e4 | 762 | /* put descriptor for string with that id into buf (buflen >= 256) */ |
41dceed5 | 763 | int usb_gadget_get_string(struct usb_gadget_strings *table, int id, u8 *buf); |
1da177e4 LT |
764 | |
765 | /*-------------------------------------------------------------------------*/ | |
766 | ||
767 | /* utility to simplify managing config descriptors */ | |
768 | ||
769 | /* write vector of descriptors into buffer */ | |
770 | int usb_descriptor_fillbuf(void *, unsigned, | |
771 | const struct usb_descriptor_header **); | |
772 | ||
773 | /* build config descriptor from single descriptor vector */ | |
774 | int usb_gadget_config_buf(const struct usb_config_descriptor *config, | |
775 | void *buf, unsigned buflen, const struct usb_descriptor_header **desc); | |
776 | ||
a4c39c41 DB |
777 | /* copy a NULL-terminated vector of descriptors */ |
778 | struct usb_descriptor_header **usb_copy_descriptors( | |
779 | struct usb_descriptor_header **); | |
780 | ||
a4c39c41 DB |
781 | /** |
782 | * usb_free_descriptors - free descriptors returned by usb_copy_descriptors() | |
783 | * @v: vector of descriptors | |
784 | */ | |
785 | static inline void usb_free_descriptors(struct usb_descriptor_header **v) | |
786 | { | |
787 | kfree(v); | |
788 | } | |
789 | ||
10287bae SAS |
790 | struct usb_function; |
791 | int usb_assign_descriptors(struct usb_function *f, | |
792 | struct usb_descriptor_header **fs, | |
793 | struct usb_descriptor_header **hs, | |
eaef50c7 JY |
794 | struct usb_descriptor_header **ss, |
795 | struct usb_descriptor_header **ssp); | |
10287bae SAS |
796 | void usb_free_all_descriptors(struct usb_function *f); |
797 | ||
d1606dfb LJ |
798 | struct usb_descriptor_header *usb_otg_descriptor_alloc( |
799 | struct usb_gadget *gadget); | |
800 | int usb_otg_descriptor_init(struct usb_gadget *gadget, | |
801 | struct usb_descriptor_header *otg_desc); | |
1da177e4 LT |
802 | /*-------------------------------------------------------------------------*/ |
803 | ||
a698908d FB |
804 | /* utility to simplify map/unmap of usb_requests to/from DMA */ |
805 | ||
679ca39f YS |
806 | extern int usb_gadget_map_request_by_dev(struct device *dev, |
807 | struct usb_request *req, int is_in); | |
a698908d FB |
808 | extern int usb_gadget_map_request(struct usb_gadget *gadget, |
809 | struct usb_request *req, int is_in); | |
810 | ||
679ca39f YS |
811 | extern void usb_gadget_unmap_request_by_dev(struct device *dev, |
812 | struct usb_request *req, int is_in); | |
a698908d FB |
813 | extern void usb_gadget_unmap_request(struct usb_gadget *gadget, |
814 | struct usb_request *req, int is_in); | |
815 | ||
816 | /*-------------------------------------------------------------------------*/ | |
817 | ||
49401f41 FB |
818 | /* utility to set gadget state properly */ |
819 | ||
820 | extern void usb_gadget_set_state(struct usb_gadget *gadget, | |
821 | enum usb_device_state state); | |
822 | ||
823 | /*-------------------------------------------------------------------------*/ | |
824 | ||
974a70bd PC |
825 | /* utility to tell udc core that the bus reset occurs */ |
826 | extern void usb_gadget_udc_reset(struct usb_gadget *gadget, | |
827 | struct usb_gadget_driver *driver); | |
828 | ||
829 | /*-------------------------------------------------------------------------*/ | |
830 | ||
3fc2aa55 MS |
831 | /* utility to give requests back to the gadget layer */ |
832 | ||
833 | extern void usb_gadget_giveback_request(struct usb_ep *ep, | |
834 | struct usb_request *req); | |
835 | ||
628ef0d2 PC |
836 | /*-------------------------------------------------------------------------*/ |
837 | ||
b0aea003 RB |
838 | /* utility to find endpoint by name */ |
839 | ||
840 | extern struct usb_ep *gadget_find_ep_by_name(struct usb_gadget *g, | |
841 | const char *name); | |
842 | ||
843 | /*-------------------------------------------------------------------------*/ | |
844 | ||
4278c687 RB |
845 | /* utility to check if endpoint caps match descriptor needs */ |
846 | ||
847 | extern int usb_gadget_ep_match_desc(struct usb_gadget *gadget, | |
848 | struct usb_ep *ep, struct usb_endpoint_descriptor *desc, | |
849 | struct usb_ss_ep_comp_descriptor *ep_comp); | |
850 | ||
851 | /*-------------------------------------------------------------------------*/ | |
852 | ||
628ef0d2 PC |
853 | /* utility to update vbus status for udc core, it may be scheduled */ |
854 | extern void usb_udc_vbus_handler(struct usb_gadget *gadget, bool status); | |
3fc2aa55 MS |
855 | |
856 | /*-------------------------------------------------------------------------*/ | |
857 | ||
1da177e4 LT |
858 | /* utility wrapping a simple endpoint selection policy */ |
859 | ||
41dceed5 | 860 | extern struct usb_ep *usb_ep_autoconfig(struct usb_gadget *, |
3ab810f1 | 861 | struct usb_endpoint_descriptor *); |
1da177e4 | 862 | |
a59d6b91 TB |
863 | |
864 | extern struct usb_ep *usb_ep_autoconfig_ss(struct usb_gadget *, | |
865 | struct usb_endpoint_descriptor *, | |
866 | struct usb_ss_ep_comp_descriptor *); | |
867 | ||
b67f628c RB |
868 | extern void usb_ep_autoconfig_release(struct usb_ep *); |
869 | ||
3ab810f1 | 870 | extern void usb_ep_autoconfig_reset(struct usb_gadget *); |
1da177e4 | 871 | |
dda43a0e | 872 | #endif /* __LINUX_USB_GADGET_H */ |