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Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * dummy_hcd.c -- Dummy/Loopback USB host and device emulator driver. | |
3 | * | |
4 | * Maintainer: Alan Stern <stern@rowland.harvard.edu> | |
5 | * | |
6 | * Copyright (C) 2003 David Brownell | |
7 | * Copyright (C) 2003-2005 Alan Stern | |
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 as published by | |
11 | * the Free Software Foundation; either version 2 of the License, or | |
12 | * (at your option) any later version. | |
1da177e4 LT |
13 | */ |
14 | ||
15 | ||
16 | /* | |
17 | * This exposes a device side "USB gadget" API, driven by requests to a | |
18 | * Linux-USB host controller driver. USB traffic is simulated; there's | |
19 | * no need for USB hardware. Use this with two other drivers: | |
20 | * | |
21 | * - Gadget driver, responding to requests (slave); | |
22 | * - Host-side device driver, as already familiar in Linux. | |
23 | * | |
24 | * Having this all in one kernel can help some stages of development, | |
25 | * bypassing some hardware (and driver) issues. UML could help too. | |
26 | */ | |
27 | ||
1da177e4 LT |
28 | #include <linux/module.h> |
29 | #include <linux/kernel.h> | |
30 | #include <linux/delay.h> | |
31 | #include <linux/ioport.h> | |
1da177e4 | 32 | #include <linux/slab.h> |
1da177e4 LT |
33 | #include <linux/errno.h> |
34 | #include <linux/init.h> | |
35 | #include <linux/timer.h> | |
36 | #include <linux/list.h> | |
37 | #include <linux/interrupt.h> | |
d052d1be | 38 | #include <linux/platform_device.h> |
1da177e4 | 39 | #include <linux/usb.h> |
9454a57a | 40 | #include <linux/usb/gadget.h> |
27729aad | 41 | #include <linux/usb/hcd.h> |
14fce33a | 42 | #include <linux/scatterlist.h> |
1da177e4 LT |
43 | |
44 | #include <asm/byteorder.h> | |
18f2cbaa | 45 | #include <linux/io.h> |
1da177e4 | 46 | #include <asm/irq.h> |
1da177e4 LT |
47 | #include <asm/unaligned.h> |
48 | ||
1da177e4 | 49 | #define DRIVER_DESC "USB Host+Gadget Emulator" |
391eca9d | 50 | #define DRIVER_VERSION "02 May 2005" |
1da177e4 | 51 | |
caf29f62 AS |
52 | #define POWER_BUDGET 500 /* in mA; use 8 for low-power port testing */ |
53 | ||
18f2cbaa SAS |
54 | static const char driver_name[] = "dummy_hcd"; |
55 | static const char driver_desc[] = "USB Host+Gadget Emulator"; | |
1da177e4 | 56 | |
18f2cbaa | 57 | static const char gadget_name[] = "dummy_udc"; |
1da177e4 | 58 | |
18f2cbaa SAS |
59 | MODULE_DESCRIPTION(DRIVER_DESC); |
60 | MODULE_AUTHOR("David Brownell"); | |
61 | MODULE_LICENSE("GPL"); | |
1da177e4 | 62 | |
1cd8fd28 TB |
63 | struct dummy_hcd_module_parameters { |
64 | bool is_super_speed; | |
7eca4c5a | 65 | bool is_high_speed; |
c7a1db45 | 66 | unsigned int num; |
1cd8fd28 TB |
67 | }; |
68 | ||
69 | static struct dummy_hcd_module_parameters mod_data = { | |
7eca4c5a TB |
70 | .is_super_speed = false, |
71 | .is_high_speed = true, | |
c7a1db45 | 72 | .num = 1, |
1cd8fd28 TB |
73 | }; |
74 | module_param_named(is_super_speed, mod_data.is_super_speed, bool, S_IRUGO); | |
75 | MODULE_PARM_DESC(is_super_speed, "true to simulate SuperSpeed connection"); | |
7eca4c5a TB |
76 | module_param_named(is_high_speed, mod_data.is_high_speed, bool, S_IRUGO); |
77 | MODULE_PARM_DESC(is_high_speed, "true to simulate HighSpeed connection"); | |
c7a1db45 SAS |
78 | module_param_named(num, mod_data.num, uint, S_IRUGO); |
79 | MODULE_PARM_DESC(num, "number of emulated controllers"); | |
1da177e4 LT |
80 | /*-------------------------------------------------------------------------*/ |
81 | ||
82 | /* gadget side driver data structres */ | |
83 | struct dummy_ep { | |
84 | struct list_head queue; | |
85 | unsigned long last_io; /* jiffies timestamp */ | |
86 | struct usb_gadget *gadget; | |
87 | const struct usb_endpoint_descriptor *desc; | |
88 | struct usb_ep ep; | |
18f2cbaa SAS |
89 | unsigned halted:1; |
90 | unsigned wedged:1; | |
91 | unsigned already_seen:1; | |
92 | unsigned setup_stage:1; | |
a54c979f | 93 | unsigned stream_en:1; |
1da177e4 LT |
94 | }; |
95 | ||
96 | struct dummy_request { | |
97 | struct list_head queue; /* ep's requests */ | |
98 | struct usb_request req; | |
99 | }; | |
100 | ||
18f2cbaa | 101 | static inline struct dummy_ep *usb_ep_to_dummy_ep(struct usb_ep *_ep) |
1da177e4 | 102 | { |
18f2cbaa | 103 | return container_of(_ep, struct dummy_ep, ep); |
1da177e4 LT |
104 | } |
105 | ||
106 | static inline struct dummy_request *usb_request_to_dummy_request | |
107 | (struct usb_request *_req) | |
108 | { | |
18f2cbaa | 109 | return container_of(_req, struct dummy_request, req); |
1da177e4 LT |
110 | } |
111 | ||
112 | /*-------------------------------------------------------------------------*/ | |
113 | ||
114 | /* | |
115 | * Every device has ep0 for control requests, plus up to 30 more endpoints, | |
116 | * in one of two types: | |
117 | * | |
118 | * - Configurable: direction (in/out), type (bulk, iso, etc), and endpoint | |
119 | * number can be changed. Names like "ep-a" are used for this type. | |
120 | * | |
121 | * - Fixed Function: in other cases. some characteristics may be mutable; | |
122 | * that'd be hardware-specific. Names like "ep12out-bulk" are used. | |
123 | * | |
124 | * Gadget drivers are responsible for not setting up conflicting endpoint | |
125 | * configurations, illegal or unsupported packet lengths, and so on. | |
126 | */ | |
127 | ||
18f2cbaa | 128 | static const char ep0name[] = "ep0"; |
1da177e4 | 129 | |
7a3b8e70 RB |
130 | static const struct { |
131 | const char *name; | |
132 | const struct usb_ep_caps caps; | |
133 | } ep_info[] = { | |
134 | #define EP_INFO(_name, _caps) \ | |
135 | { \ | |
136 | .name = _name, \ | |
137 | .caps = _caps, \ | |
138 | } | |
1da177e4 | 139 | |
7a3b8e70 RB |
140 | /* everyone has ep0 */ |
141 | EP_INFO(ep0name, | |
142 | USB_EP_CAPS(USB_EP_CAPS_TYPE_CONTROL, USB_EP_CAPS_DIR_ALL)), | |
1d16638e | 143 | /* act like a pxa250: fifteen fixed function endpoints */ |
7a3b8e70 RB |
144 | EP_INFO("ep1in-bulk", |
145 | USB_EP_CAPS(USB_EP_CAPS_TYPE_BULK, USB_EP_CAPS_DIR_IN)), | |
146 | EP_INFO("ep2out-bulk", | |
147 | USB_EP_CAPS(USB_EP_CAPS_TYPE_BULK, USB_EP_CAPS_DIR_OUT)), | |
148 | EP_INFO("ep3in-iso", | |
149 | USB_EP_CAPS(USB_EP_CAPS_TYPE_ISO, USB_EP_CAPS_DIR_IN)), | |
150 | EP_INFO("ep4out-iso", | |
151 | USB_EP_CAPS(USB_EP_CAPS_TYPE_ISO, USB_EP_CAPS_DIR_OUT)), | |
152 | EP_INFO("ep5in-int", | |
153 | USB_EP_CAPS(USB_EP_CAPS_TYPE_INT, USB_EP_CAPS_DIR_IN)), | |
154 | EP_INFO("ep6in-bulk", | |
155 | USB_EP_CAPS(USB_EP_CAPS_TYPE_BULK, USB_EP_CAPS_DIR_IN)), | |
156 | EP_INFO("ep7out-bulk", | |
157 | USB_EP_CAPS(USB_EP_CAPS_TYPE_BULK, USB_EP_CAPS_DIR_OUT)), | |
158 | EP_INFO("ep8in-iso", | |
159 | USB_EP_CAPS(USB_EP_CAPS_TYPE_ISO, USB_EP_CAPS_DIR_IN)), | |
160 | EP_INFO("ep9out-iso", | |
161 | USB_EP_CAPS(USB_EP_CAPS_TYPE_ISO, USB_EP_CAPS_DIR_OUT)), | |
162 | EP_INFO("ep10in-int", | |
163 | USB_EP_CAPS(USB_EP_CAPS_TYPE_INT, USB_EP_CAPS_DIR_IN)), | |
164 | EP_INFO("ep11in-bulk", | |
165 | USB_EP_CAPS(USB_EP_CAPS_TYPE_BULK, USB_EP_CAPS_DIR_IN)), | |
166 | EP_INFO("ep12out-bulk", | |
167 | USB_EP_CAPS(USB_EP_CAPS_TYPE_BULK, USB_EP_CAPS_DIR_OUT)), | |
168 | EP_INFO("ep13in-iso", | |
169 | USB_EP_CAPS(USB_EP_CAPS_TYPE_ISO, USB_EP_CAPS_DIR_IN)), | |
170 | EP_INFO("ep14out-iso", | |
171 | USB_EP_CAPS(USB_EP_CAPS_TYPE_ISO, USB_EP_CAPS_DIR_OUT)), | |
172 | EP_INFO("ep15in-int", | |
173 | USB_EP_CAPS(USB_EP_CAPS_TYPE_INT, USB_EP_CAPS_DIR_IN)), | |
1da177e4 | 174 | /* or like sa1100: two fixed function endpoints */ |
7a3b8e70 RB |
175 | EP_INFO("ep1out-bulk", |
176 | USB_EP_CAPS(USB_EP_CAPS_TYPE_BULK, USB_EP_CAPS_DIR_OUT)), | |
177 | EP_INFO("ep2in-bulk", | |
178 | USB_EP_CAPS(USB_EP_CAPS_TYPE_BULK, USB_EP_CAPS_DIR_IN)), | |
1d16638e | 179 | /* and now some generic EPs so we have enough in multi config */ |
7a3b8e70 RB |
180 | EP_INFO("ep3out", |
181 | USB_EP_CAPS(USB_EP_CAPS_TYPE_ALL, USB_EP_CAPS_DIR_OUT)), | |
182 | EP_INFO("ep4in", | |
183 | USB_EP_CAPS(USB_EP_CAPS_TYPE_ALL, USB_EP_CAPS_DIR_IN)), | |
184 | EP_INFO("ep5out", | |
185 | USB_EP_CAPS(USB_EP_CAPS_TYPE_ALL, USB_EP_CAPS_DIR_OUT)), | |
186 | EP_INFO("ep6out", | |
187 | USB_EP_CAPS(USB_EP_CAPS_TYPE_ALL, USB_EP_CAPS_DIR_OUT)), | |
188 | EP_INFO("ep7in", | |
189 | USB_EP_CAPS(USB_EP_CAPS_TYPE_ALL, USB_EP_CAPS_DIR_IN)), | |
190 | EP_INFO("ep8out", | |
191 | USB_EP_CAPS(USB_EP_CAPS_TYPE_ALL, USB_EP_CAPS_DIR_OUT)), | |
192 | EP_INFO("ep9in", | |
193 | USB_EP_CAPS(USB_EP_CAPS_TYPE_ALL, USB_EP_CAPS_DIR_IN)), | |
194 | EP_INFO("ep10out", | |
195 | USB_EP_CAPS(USB_EP_CAPS_TYPE_ALL, USB_EP_CAPS_DIR_OUT)), | |
196 | EP_INFO("ep11out", | |
197 | USB_EP_CAPS(USB_EP_CAPS_TYPE_ALL, USB_EP_CAPS_DIR_OUT)), | |
198 | EP_INFO("ep12in", | |
199 | USB_EP_CAPS(USB_EP_CAPS_TYPE_ALL, USB_EP_CAPS_DIR_IN)), | |
200 | EP_INFO("ep13out", | |
201 | USB_EP_CAPS(USB_EP_CAPS_TYPE_ALL, USB_EP_CAPS_DIR_OUT)), | |
202 | EP_INFO("ep14in", | |
203 | USB_EP_CAPS(USB_EP_CAPS_TYPE_ALL, USB_EP_CAPS_DIR_IN)), | |
204 | EP_INFO("ep15out", | |
205 | USB_EP_CAPS(USB_EP_CAPS_TYPE_ALL, USB_EP_CAPS_DIR_OUT)), | |
206 | ||
207 | #undef EP_INFO | |
1da177e4 | 208 | }; |
7a3b8e70 RB |
209 | |
210 | #define DUMMY_ENDPOINTS ARRAY_SIZE(ep_info) | |
1da177e4 | 211 | |
d9b76251 AS |
212 | /*-------------------------------------------------------------------------*/ |
213 | ||
1da177e4 LT |
214 | #define FIFO_SIZE 64 |
215 | ||
216 | struct urbp { | |
217 | struct urb *urb; | |
218 | struct list_head urbp_list; | |
14fce33a SAS |
219 | struct sg_mapping_iter miter; |
220 | u32 miter_started; | |
1da177e4 LT |
221 | }; |
222 | ||
391eca9d AS |
223 | |
224 | enum dummy_rh_state { | |
225 | DUMMY_RH_RESET, | |
226 | DUMMY_RH_SUSPENDED, | |
227 | DUMMY_RH_RUNNING | |
228 | }; | |
229 | ||
cdfcbd2c TB |
230 | struct dummy_hcd { |
231 | struct dummy *dum; | |
232 | enum dummy_rh_state rh_state; | |
233 | struct timer_list timer; | |
234 | u32 port_status; | |
235 | u32 old_status; | |
236 | unsigned long re_timeout; | |
237 | ||
238 | struct usb_device *udev; | |
239 | struct list_head urbp_list; | |
a54c979f SAS |
240 | u32 stream_en_ep; |
241 | u8 num_stream[30 / 2]; | |
cdfcbd2c TB |
242 | |
243 | unsigned active:1; | |
244 | unsigned old_active:1; | |
245 | unsigned resuming:1; | |
246 | }; | |
247 | ||
1da177e4 LT |
248 | struct dummy { |
249 | spinlock_t lock; | |
250 | ||
251 | /* | |
252 | * SLAVE/GADGET side support | |
253 | */ | |
18f2cbaa | 254 | struct dummy_ep ep[DUMMY_ENDPOINTS]; |
1da177e4 LT |
255 | int address; |
256 | struct usb_gadget gadget; | |
257 | struct usb_gadget_driver *driver; | |
258 | struct dummy_request fifo_req; | |
18f2cbaa | 259 | u8 fifo_buf[FIFO_SIZE]; |
1da177e4 | 260 | u16 devstatus; |
391eca9d | 261 | unsigned udc_suspended:1; |
f1c39fad | 262 | unsigned pullup:1; |
1da177e4 LT |
263 | |
264 | /* | |
265 | * MASTER/HOST side support | |
266 | */ | |
cdfcbd2c | 267 | struct dummy_hcd *hs_hcd; |
1cd8fd28 | 268 | struct dummy_hcd *ss_hcd; |
1da177e4 LT |
269 | }; |
270 | ||
cdfcbd2c | 271 | static inline struct dummy_hcd *hcd_to_dummy_hcd(struct usb_hcd *hcd) |
1da177e4 | 272 | { |
cdfcbd2c | 273 | return (struct dummy_hcd *) (hcd->hcd_priv); |
1da177e4 LT |
274 | } |
275 | ||
cdfcbd2c | 276 | static inline struct usb_hcd *dummy_hcd_to_hcd(struct dummy_hcd *dum) |
1da177e4 LT |
277 | { |
278 | return container_of((void *) dum, struct usb_hcd, hcd_priv); | |
279 | } | |
280 | ||
cdfcbd2c | 281 | static inline struct device *dummy_dev(struct dummy_hcd *dum) |
1da177e4 | 282 | { |
cdfcbd2c | 283 | return dummy_hcd_to_hcd(dum)->self.controller; |
1da177e4 LT |
284 | } |
285 | ||
18f2cbaa | 286 | static inline struct device *udc_dev(struct dummy *dum) |
d9b76251 AS |
287 | { |
288 | return dum->gadget.dev.parent; | |
289 | } | |
290 | ||
18f2cbaa | 291 | static inline struct dummy *ep_to_dummy(struct dummy_ep *ep) |
1da177e4 | 292 | { |
18f2cbaa | 293 | return container_of(ep->gadget, struct dummy, gadget); |
1da177e4 LT |
294 | } |
295 | ||
cdfcbd2c | 296 | static inline struct dummy_hcd *gadget_to_dummy_hcd(struct usb_gadget *gadget) |
1da177e4 | 297 | { |
cdfcbd2c | 298 | struct dummy *dum = container_of(gadget, struct dummy, gadget); |
1cd8fd28 TB |
299 | if (dum->gadget.speed == USB_SPEED_SUPER) |
300 | return dum->ss_hcd; | |
301 | else | |
302 | return dum->hs_hcd; | |
1da177e4 LT |
303 | } |
304 | ||
18f2cbaa | 305 | static inline struct dummy *gadget_dev_to_dummy(struct device *dev) |
1da177e4 | 306 | { |
18f2cbaa | 307 | return container_of(dev, struct dummy, gadget.dev); |
1da177e4 LT |
308 | } |
309 | ||
1da177e4 LT |
310 | /*-------------------------------------------------------------------------*/ |
311 | ||
f1c39fad AS |
312 | /* SLAVE/GADGET SIDE UTILITY ROUTINES */ |
313 | ||
314 | /* called with spinlock held */ | |
18f2cbaa | 315 | static void nuke(struct dummy *dum, struct dummy_ep *ep) |
f1c39fad | 316 | { |
18f2cbaa | 317 | while (!list_empty(&ep->queue)) { |
f1c39fad AS |
318 | struct dummy_request *req; |
319 | ||
18f2cbaa SAS |
320 | req = list_entry(ep->queue.next, struct dummy_request, queue); |
321 | list_del_init(&req->queue); | |
f1c39fad AS |
322 | req->req.status = -ESHUTDOWN; |
323 | ||
18f2cbaa | 324 | spin_unlock(&dum->lock); |
304f7e5e | 325 | usb_gadget_giveback_request(&ep->ep, &req->req); |
18f2cbaa | 326 | spin_lock(&dum->lock); |
f1c39fad AS |
327 | } |
328 | } | |
329 | ||
330 | /* caller must hold lock */ | |
18f2cbaa | 331 | static void stop_activity(struct dummy *dum) |
f1c39fad | 332 | { |
bcdbeb84 | 333 | int i; |
f1c39fad AS |
334 | |
335 | /* prevent any more requests */ | |
336 | dum->address = 0; | |
337 | ||
338 | /* The timer is left running so that outstanding URBs can fail */ | |
339 | ||
340 | /* nuke any pending requests first, so driver i/o is quiesced */ | |
bcdbeb84 AS |
341 | for (i = 0; i < DUMMY_ENDPOINTS; ++i) |
342 | nuke(dum, &dum->ep[i]); | |
f1c39fad AS |
343 | |
344 | /* driver now does any non-usb quiescing necessary */ | |
345 | } | |
346 | ||
1cd8fd28 TB |
347 | /** |
348 | * set_link_state_by_speed() - Sets the current state of the link according to | |
349 | * the hcd speed | |
350 | * @dum_hcd: pointer to the dummy_hcd structure to update the link state for | |
351 | * | |
352 | * This function updates the port_status according to the link state and the | |
353 | * speed of the hcd. | |
354 | */ | |
355 | static void set_link_state_by_speed(struct dummy_hcd *dum_hcd) | |
356 | { | |
357 | struct dummy *dum = dum_hcd->dum; | |
358 | ||
359 | if (dummy_hcd_to_hcd(dum_hcd)->speed == HCD_USB3) { | |
360 | if ((dum_hcd->port_status & USB_SS_PORT_STAT_POWER) == 0) { | |
361 | dum_hcd->port_status = 0; | |
362 | } else if (!dum->pullup || dum->udc_suspended) { | |
363 | /* UDC suspend must cause a disconnect */ | |
364 | dum_hcd->port_status &= ~(USB_PORT_STAT_CONNECTION | | |
365 | USB_PORT_STAT_ENABLE); | |
366 | if ((dum_hcd->old_status & | |
367 | USB_PORT_STAT_CONNECTION) != 0) | |
368 | dum_hcd->port_status |= | |
369 | (USB_PORT_STAT_C_CONNECTION << 16); | |
370 | } else { | |
371 | /* device is connected and not suspended */ | |
372 | dum_hcd->port_status |= (USB_PORT_STAT_CONNECTION | | |
373 | USB_PORT_STAT_SPEED_5GBPS) ; | |
374 | if ((dum_hcd->old_status & | |
375 | USB_PORT_STAT_CONNECTION) == 0) | |
376 | dum_hcd->port_status |= | |
377 | (USB_PORT_STAT_C_CONNECTION << 16); | |
378 | if ((dum_hcd->port_status & | |
379 | USB_PORT_STAT_ENABLE) == 1 && | |
380 | (dum_hcd->port_status & | |
381 | USB_SS_PORT_LS_U0) == 1 && | |
382 | dum_hcd->rh_state != DUMMY_RH_SUSPENDED) | |
383 | dum_hcd->active = 1; | |
384 | } | |
385 | } else { | |
386 | if ((dum_hcd->port_status & USB_PORT_STAT_POWER) == 0) { | |
387 | dum_hcd->port_status = 0; | |
388 | } else if (!dum->pullup || dum->udc_suspended) { | |
389 | /* UDC suspend must cause a disconnect */ | |
390 | dum_hcd->port_status &= ~(USB_PORT_STAT_CONNECTION | | |
391 | USB_PORT_STAT_ENABLE | | |
392 | USB_PORT_STAT_LOW_SPEED | | |
393 | USB_PORT_STAT_HIGH_SPEED | | |
394 | USB_PORT_STAT_SUSPEND); | |
395 | if ((dum_hcd->old_status & | |
396 | USB_PORT_STAT_CONNECTION) != 0) | |
397 | dum_hcd->port_status |= | |
398 | (USB_PORT_STAT_C_CONNECTION << 16); | |
399 | } else { | |
400 | dum_hcd->port_status |= USB_PORT_STAT_CONNECTION; | |
401 | if ((dum_hcd->old_status & | |
402 | USB_PORT_STAT_CONNECTION) == 0) | |
403 | dum_hcd->port_status |= | |
404 | (USB_PORT_STAT_C_CONNECTION << 16); | |
405 | if ((dum_hcd->port_status & USB_PORT_STAT_ENABLE) == 0) | |
406 | dum_hcd->port_status &= ~USB_PORT_STAT_SUSPEND; | |
407 | else if ((dum_hcd->port_status & | |
408 | USB_PORT_STAT_SUSPEND) == 0 && | |
409 | dum_hcd->rh_state != DUMMY_RH_SUSPENDED) | |
410 | dum_hcd->active = 1; | |
411 | } | |
412 | } | |
413 | } | |
414 | ||
f1c39fad | 415 | /* caller must hold lock */ |
cdfcbd2c | 416 | static void set_link_state(struct dummy_hcd *dum_hcd) |
f1c39fad | 417 | { |
cdfcbd2c TB |
418 | struct dummy *dum = dum_hcd->dum; |
419 | ||
420 | dum_hcd->active = 0; | |
1cd8fd28 TB |
421 | if (dum->pullup) |
422 | if ((dummy_hcd_to_hcd(dum_hcd)->speed == HCD_USB3 && | |
423 | dum->gadget.speed != USB_SPEED_SUPER) || | |
424 | (dummy_hcd_to_hcd(dum_hcd)->speed != HCD_USB3 && | |
425 | dum->gadget.speed == USB_SPEED_SUPER)) | |
426 | return; | |
427 | ||
428 | set_link_state_by_speed(dum_hcd); | |
f1c39fad | 429 | |
cdfcbd2c TB |
430 | if ((dum_hcd->port_status & USB_PORT_STAT_ENABLE) == 0 || |
431 | dum_hcd->active) | |
432 | dum_hcd->resuming = 0; | |
f1c39fad | 433 | |
8480484d | 434 | /* Currently !connected or in reset */ |
cdfcbd2c TB |
435 | if ((dum_hcd->port_status & USB_PORT_STAT_CONNECTION) == 0 || |
436 | (dum_hcd->port_status & USB_PORT_STAT_RESET) != 0) { | |
8480484d AS |
437 | unsigned disconnect = USB_PORT_STAT_CONNECTION & |
438 | dum_hcd->old_status & (~dum_hcd->port_status); | |
439 | unsigned reset = USB_PORT_STAT_RESET & | |
440 | (~dum_hcd->old_status) & dum_hcd->port_status; | |
441 | ||
442 | /* Report reset and disconnect events to the driver */ | |
443 | if (dum->driver && (disconnect || reset)) { | |
1cd8fd28 TB |
444 | stop_activity(dum); |
445 | spin_unlock(&dum->lock); | |
8480484d AS |
446 | if (reset) |
447 | usb_gadget_udc_reset(&dum->gadget, dum->driver); | |
448 | else | |
449 | dum->driver->disconnect(&dum->gadget); | |
1cd8fd28 | 450 | spin_lock(&dum->lock); |
f1c39fad | 451 | } |
cdfcbd2c TB |
452 | } else if (dum_hcd->active != dum_hcd->old_active) { |
453 | if (dum_hcd->old_active && dum->driver->suspend) { | |
1cd8fd28 TB |
454 | spin_unlock(&dum->lock); |
455 | dum->driver->suspend(&dum->gadget); | |
456 | spin_lock(&dum->lock); | |
457 | } else if (!dum_hcd->old_active && dum->driver->resume) { | |
458 | spin_unlock(&dum->lock); | |
459 | dum->driver->resume(&dum->gadget); | |
460 | spin_lock(&dum->lock); | |
f1c39fad AS |
461 | } |
462 | } | |
463 | ||
cdfcbd2c TB |
464 | dum_hcd->old_status = dum_hcd->port_status; |
465 | dum_hcd->old_active = dum_hcd->active; | |
f1c39fad AS |
466 | } |
467 | ||
468 | /*-------------------------------------------------------------------------*/ | |
469 | ||
1da177e4 LT |
470 | /* SLAVE/GADGET SIDE DRIVER |
471 | * | |
472 | * This only tracks gadget state. All the work is done when the host | |
473 | * side tries some (emulated) i/o operation. Real device controller | |
474 | * drivers would do real i/o using dma, fifos, irqs, timers, etc. | |
475 | */ | |
476 | ||
477 | #define is_enabled(dum) \ | |
478 | (dum->port_status & USB_PORT_STAT_ENABLE) | |
479 | ||
18f2cbaa SAS |
480 | static int dummy_enable(struct usb_ep *_ep, |
481 | const struct usb_endpoint_descriptor *desc) | |
1da177e4 LT |
482 | { |
483 | struct dummy *dum; | |
cdfcbd2c | 484 | struct dummy_hcd *dum_hcd; |
1da177e4 LT |
485 | struct dummy_ep *ep; |
486 | unsigned max; | |
487 | int retval; | |
488 | ||
18f2cbaa | 489 | ep = usb_ep_to_dummy_ep(_ep); |
1da177e4 LT |
490 | if (!_ep || !desc || ep->desc || _ep->name == ep0name |
491 | || desc->bDescriptorType != USB_DT_ENDPOINT) | |
492 | return -EINVAL; | |
18f2cbaa | 493 | dum = ep_to_dummy(ep); |
cdfcbd2c TB |
494 | if (!dum->driver) |
495 | return -ESHUTDOWN; | |
719e52cb SAS |
496 | |
497 | dum_hcd = gadget_to_dummy_hcd(&dum->gadget); | |
cdfcbd2c | 498 | if (!is_enabled(dum_hcd)) |
1da177e4 | 499 | return -ESHUTDOWN; |
cdfcbd2c TB |
500 | |
501 | /* | |
502 | * For HS/FS devices only bits 0..10 of the wMaxPacketSize represent the | |
503 | * maximum packet size. | |
1cd8fd28 | 504 | * For SS devices the wMaxPacketSize is limited by 1024. |
cdfcbd2c | 505 | */ |
c2b4d863 | 506 | max = usb_endpoint_maxp(desc); |
1da177e4 LT |
507 | |
508 | /* drivers must not request bad settings, since lower levels | |
509 | * (hardware or its drivers) may not check. some endpoints | |
510 | * can't do iso, many have maxpacket limitations, etc. | |
511 | * | |
512 | * since this "hardware" driver is here to help debugging, we | |
513 | * have some extra sanity checks. (there could be more though, | |
514 | * especially for "ep9out" style fixed function ones.) | |
515 | */ | |
516 | retval = -EINVAL; | |
59f08e6d | 517 | switch (usb_endpoint_type(desc)) { |
1da177e4 | 518 | case USB_ENDPOINT_XFER_BULK: |
18f2cbaa SAS |
519 | if (strstr(ep->ep.name, "-iso") |
520 | || strstr(ep->ep.name, "-int")) { | |
1da177e4 LT |
521 | goto done; |
522 | } | |
523 | switch (dum->gadget.speed) { | |
1cd8fd28 TB |
524 | case USB_SPEED_SUPER: |
525 | if (max == 1024) | |
526 | break; | |
527 | goto done; | |
1da177e4 LT |
528 | case USB_SPEED_HIGH: |
529 | if (max == 512) | |
530 | break; | |
9063ff44 IL |
531 | goto done; |
532 | case USB_SPEED_FULL: | |
533 | if (max == 8 || max == 16 || max == 32 || max == 64) | |
1da177e4 LT |
534 | /* we'll fake any legal size */ |
535 | break; | |
9063ff44 IL |
536 | /* save a return statement */ |
537 | default: | |
538 | goto done; | |
1da177e4 LT |
539 | } |
540 | break; | |
541 | case USB_ENDPOINT_XFER_INT: | |
18f2cbaa | 542 | if (strstr(ep->ep.name, "-iso")) /* bulk is ok */ |
1da177e4 LT |
543 | goto done; |
544 | /* real hardware might not handle all packet sizes */ | |
545 | switch (dum->gadget.speed) { | |
1cd8fd28 | 546 | case USB_SPEED_SUPER: |
1da177e4 LT |
547 | case USB_SPEED_HIGH: |
548 | if (max <= 1024) | |
549 | break; | |
550 | /* save a return statement */ | |
551 | case USB_SPEED_FULL: | |
552 | if (max <= 64) | |
553 | break; | |
554 | /* save a return statement */ | |
555 | default: | |
556 | if (max <= 8) | |
557 | break; | |
558 | goto done; | |
559 | } | |
560 | break; | |
561 | case USB_ENDPOINT_XFER_ISOC: | |
18f2cbaa SAS |
562 | if (strstr(ep->ep.name, "-bulk") |
563 | || strstr(ep->ep.name, "-int")) | |
1da177e4 LT |
564 | goto done; |
565 | /* real hardware might not handle all packet sizes */ | |
566 | switch (dum->gadget.speed) { | |
1cd8fd28 | 567 | case USB_SPEED_SUPER: |
1da177e4 LT |
568 | case USB_SPEED_HIGH: |
569 | if (max <= 1024) | |
570 | break; | |
571 | /* save a return statement */ | |
572 | case USB_SPEED_FULL: | |
573 | if (max <= 1023) | |
574 | break; | |
575 | /* save a return statement */ | |
576 | default: | |
577 | goto done; | |
578 | } | |
579 | break; | |
580 | default: | |
581 | /* few chips support control except on ep0 */ | |
582 | goto done; | |
583 | } | |
584 | ||
585 | _ep->maxpacket = max; | |
a54c979f SAS |
586 | if (usb_ss_max_streams(_ep->comp_desc)) { |
587 | if (!usb_endpoint_xfer_bulk(desc)) { | |
588 | dev_err(udc_dev(dum), "Can't enable stream support on " | |
589 | "non-bulk ep %s\n", _ep->name); | |
590 | return -EINVAL; | |
591 | } | |
592 | ep->stream_en = 1; | |
593 | } | |
3cf0ad02 | 594 | ep->desc = desc; |
1da177e4 | 595 | |
a54c979f | 596 | dev_dbg(udc_dev(dum), "enabled %s (ep%d%s-%s) maxpacket %d stream %s\n", |
1da177e4 LT |
597 | _ep->name, |
598 | desc->bEndpointAddress & 0x0f, | |
599 | (desc->bEndpointAddress & USB_DIR_IN) ? "in" : "out", | |
600 | ({ char *val; | |
59f08e6d | 601 | switch (usb_endpoint_type(desc)) { |
7c884fe4 TB |
602 | case USB_ENDPOINT_XFER_BULK: |
603 | val = "bulk"; | |
604 | break; | |
605 | case USB_ENDPOINT_XFER_ISOC: | |
606 | val = "iso"; | |
607 | break; | |
608 | case USB_ENDPOINT_XFER_INT: | |
609 | val = "intr"; | |
610 | break; | |
611 | default: | |
612 | val = "ctrl"; | |
613 | break; | |
2b84f92b | 614 | } val; }), |
a54c979f | 615 | max, ep->stream_en ? "enabled" : "disabled"); |
1da177e4 LT |
616 | |
617 | /* at this point real hardware should be NAKing transfers | |
618 | * to that endpoint, until a buffer is queued to it. | |
619 | */ | |
851a526d | 620 | ep->halted = ep->wedged = 0; |
1da177e4 LT |
621 | retval = 0; |
622 | done: | |
623 | return retval; | |
624 | } | |
625 | ||
18f2cbaa | 626 | static int dummy_disable(struct usb_ep *_ep) |
1da177e4 LT |
627 | { |
628 | struct dummy_ep *ep; | |
629 | struct dummy *dum; | |
630 | unsigned long flags; | |
1da177e4 | 631 | |
18f2cbaa | 632 | ep = usb_ep_to_dummy_ep(_ep); |
1da177e4 LT |
633 | if (!_ep || !ep->desc || _ep->name == ep0name) |
634 | return -EINVAL; | |
18f2cbaa | 635 | dum = ep_to_dummy(ep); |
1da177e4 | 636 | |
18f2cbaa | 637 | spin_lock_irqsave(&dum->lock, flags); |
1da177e4 | 638 | ep->desc = NULL; |
a54c979f | 639 | ep->stream_en = 0; |
18f2cbaa SAS |
640 | nuke(dum, ep); |
641 | spin_unlock_irqrestore(&dum->lock, flags); | |
1da177e4 | 642 | |
18f2cbaa | 643 | dev_dbg(udc_dev(dum), "disabled %s\n", _ep->name); |
849b1333 | 644 | return 0; |
1da177e4 LT |
645 | } |
646 | ||
18f2cbaa SAS |
647 | static struct usb_request *dummy_alloc_request(struct usb_ep *_ep, |
648 | gfp_t mem_flags) | |
1da177e4 | 649 | { |
1da177e4 LT |
650 | struct dummy_request *req; |
651 | ||
652 | if (!_ep) | |
653 | return NULL; | |
1da177e4 | 654 | |
7039f422 | 655 | req = kzalloc(sizeof(*req), mem_flags); |
1da177e4 LT |
656 | if (!req) |
657 | return NULL; | |
18f2cbaa | 658 | INIT_LIST_HEAD(&req->queue); |
1da177e4 LT |
659 | return &req->req; |
660 | } | |
661 | ||
18f2cbaa | 662 | static void dummy_free_request(struct usb_ep *_ep, struct usb_request *_req) |
1da177e4 | 663 | { |
1da177e4 LT |
664 | struct dummy_request *req; |
665 | ||
f99987bb | 666 | if (!_ep || !_req) { |
72688dc9 | 667 | WARN_ON(1); |
1da177e4 | 668 | return; |
f99987bb | 669 | } |
1da177e4 | 670 | |
18f2cbaa SAS |
671 | req = usb_request_to_dummy_request(_req); |
672 | WARN_ON(!list_empty(&req->queue)); | |
673 | kfree(req); | |
1da177e4 LT |
674 | } |
675 | ||
18f2cbaa | 676 | static void fifo_complete(struct usb_ep *ep, struct usb_request *req) |
1da177e4 LT |
677 | { |
678 | } | |
679 | ||
18f2cbaa | 680 | static int dummy_queue(struct usb_ep *_ep, struct usb_request *_req, |
55016f10 | 681 | gfp_t mem_flags) |
1da177e4 LT |
682 | { |
683 | struct dummy_ep *ep; | |
684 | struct dummy_request *req; | |
685 | struct dummy *dum; | |
cdfcbd2c | 686 | struct dummy_hcd *dum_hcd; |
1da177e4 LT |
687 | unsigned long flags; |
688 | ||
18f2cbaa SAS |
689 | req = usb_request_to_dummy_request(_req); |
690 | if (!_req || !list_empty(&req->queue) || !_req->complete) | |
1da177e4 LT |
691 | return -EINVAL; |
692 | ||
18f2cbaa | 693 | ep = usb_ep_to_dummy_ep(_ep); |
1da177e4 LT |
694 | if (!_ep || (!ep->desc && _ep->name != ep0name)) |
695 | return -EINVAL; | |
696 | ||
18f2cbaa | 697 | dum = ep_to_dummy(ep); |
719e52cb | 698 | dum_hcd = gadget_to_dummy_hcd(&dum->gadget); |
cdfcbd2c | 699 | if (!dum->driver || !is_enabled(dum_hcd)) |
1da177e4 LT |
700 | return -ESHUTDOWN; |
701 | ||
702 | #if 0 | |
18f2cbaa | 703 | dev_dbg(udc_dev(dum), "ep %p queue req %p to %s, len %d buf %p\n", |
1da177e4 LT |
704 | ep, _req, _ep->name, _req->length, _req->buf); |
705 | #endif | |
1da177e4 LT |
706 | _req->status = -EINPROGRESS; |
707 | _req->actual = 0; | |
18f2cbaa | 708 | spin_lock_irqsave(&dum->lock, flags); |
1da177e4 LT |
709 | |
710 | /* implement an emulated single-request FIFO */ | |
711 | if (ep->desc && (ep->desc->bEndpointAddress & USB_DIR_IN) && | |
18f2cbaa SAS |
712 | list_empty(&dum->fifo_req.queue) && |
713 | list_empty(&ep->queue) && | |
1da177e4 LT |
714 | _req->length <= FIFO_SIZE) { |
715 | req = &dum->fifo_req; | |
716 | req->req = *_req; | |
717 | req->req.buf = dum->fifo_buf; | |
18f2cbaa | 718 | memcpy(dum->fifo_buf, _req->buf, _req->length); |
1da177e4 LT |
719 | req->req.context = dum; |
720 | req->req.complete = fifo_complete; | |
721 | ||
c728df70 | 722 | list_add_tail(&req->queue, &ep->queue); |
18f2cbaa | 723 | spin_unlock(&dum->lock); |
1da177e4 LT |
724 | _req->actual = _req->length; |
725 | _req->status = 0; | |
304f7e5e | 726 | usb_gadget_giveback_request(_ep, _req); |
18f2cbaa | 727 | spin_lock(&dum->lock); |
c728df70 DB |
728 | } else |
729 | list_add_tail(&req->queue, &ep->queue); | |
18f2cbaa | 730 | spin_unlock_irqrestore(&dum->lock, flags); |
1da177e4 LT |
731 | |
732 | /* real hardware would likely enable transfers here, in case | |
733 | * it'd been left NAKing. | |
734 | */ | |
735 | return 0; | |
736 | } | |
737 | ||
18f2cbaa | 738 | static int dummy_dequeue(struct usb_ep *_ep, struct usb_request *_req) |
1da177e4 LT |
739 | { |
740 | struct dummy_ep *ep; | |
741 | struct dummy *dum; | |
742 | int retval = -EINVAL; | |
743 | unsigned long flags; | |
744 | struct dummy_request *req = NULL; | |
745 | ||
746 | if (!_ep || !_req) | |
747 | return retval; | |
18f2cbaa SAS |
748 | ep = usb_ep_to_dummy_ep(_ep); |
749 | dum = ep_to_dummy(ep); | |
1da177e4 LT |
750 | |
751 | if (!dum->driver) | |
752 | return -ESHUTDOWN; | |
753 | ||
18f2cbaa SAS |
754 | local_irq_save(flags); |
755 | spin_lock(&dum->lock); | |
756 | list_for_each_entry(req, &ep->queue, queue) { | |
1da177e4 | 757 | if (&req->req == _req) { |
18f2cbaa | 758 | list_del_init(&req->queue); |
1da177e4 LT |
759 | _req->status = -ECONNRESET; |
760 | retval = 0; | |
761 | break; | |
762 | } | |
763 | } | |
18f2cbaa | 764 | spin_unlock(&dum->lock); |
1da177e4 LT |
765 | |
766 | if (retval == 0) { | |
18f2cbaa | 767 | dev_dbg(udc_dev(dum), |
1da177e4 LT |
768 | "dequeued req %p from %s, len %d buf %p\n", |
769 | req, _ep->name, _req->length, _req->buf); | |
304f7e5e | 770 | usb_gadget_giveback_request(_ep, _req); |
1da177e4 | 771 | } |
18f2cbaa | 772 | local_irq_restore(flags); |
1da177e4 LT |
773 | return retval; |
774 | } | |
775 | ||
776 | static int | |
851a526d | 777 | dummy_set_halt_and_wedge(struct usb_ep *_ep, int value, int wedged) |
1da177e4 LT |
778 | { |
779 | struct dummy_ep *ep; | |
780 | struct dummy *dum; | |
781 | ||
782 | if (!_ep) | |
783 | return -EINVAL; | |
18f2cbaa SAS |
784 | ep = usb_ep_to_dummy_ep(_ep); |
785 | dum = ep_to_dummy(ep); | |
1da177e4 LT |
786 | if (!dum->driver) |
787 | return -ESHUTDOWN; | |
788 | if (!value) | |
851a526d | 789 | ep->halted = ep->wedged = 0; |
1da177e4 | 790 | else if (ep->desc && (ep->desc->bEndpointAddress & USB_DIR_IN) && |
18f2cbaa | 791 | !list_empty(&ep->queue)) |
1da177e4 | 792 | return -EAGAIN; |
851a526d | 793 | else { |
1da177e4 | 794 | ep->halted = 1; |
851a526d AS |
795 | if (wedged) |
796 | ep->wedged = 1; | |
797 | } | |
1da177e4 LT |
798 | /* FIXME clear emulated data toggle too */ |
799 | return 0; | |
800 | } | |
801 | ||
851a526d AS |
802 | static int |
803 | dummy_set_halt(struct usb_ep *_ep, int value) | |
804 | { | |
805 | return dummy_set_halt_and_wedge(_ep, value, 0); | |
806 | } | |
807 | ||
808 | static int dummy_set_wedge(struct usb_ep *_ep) | |
809 | { | |
810 | if (!_ep || _ep->name == ep0name) | |
811 | return -EINVAL; | |
812 | return dummy_set_halt_and_wedge(_ep, 1, 1); | |
813 | } | |
814 | ||
1da177e4 LT |
815 | static const struct usb_ep_ops dummy_ep_ops = { |
816 | .enable = dummy_enable, | |
817 | .disable = dummy_disable, | |
818 | ||
819 | .alloc_request = dummy_alloc_request, | |
820 | .free_request = dummy_free_request, | |
821 | ||
1da177e4 LT |
822 | .queue = dummy_queue, |
823 | .dequeue = dummy_dequeue, | |
824 | ||
825 | .set_halt = dummy_set_halt, | |
851a526d | 826 | .set_wedge = dummy_set_wedge, |
1da177e4 LT |
827 | }; |
828 | ||
829 | /*-------------------------------------------------------------------------*/ | |
830 | ||
831 | /* there are both host and device side versions of this call ... */ | |
18f2cbaa | 832 | static int dummy_g_get_frame(struct usb_gadget *_gadget) |
1da177e4 | 833 | { |
04c4d8d4 | 834 | struct timespec64 ts64; |
1da177e4 | 835 | |
04c4d8d4 WP |
836 | ktime_get_ts64(&ts64); |
837 | return ts64.tv_nsec / NSEC_PER_MSEC; | |
1da177e4 LT |
838 | } |
839 | ||
18f2cbaa | 840 | static int dummy_wakeup(struct usb_gadget *_gadget) |
1da177e4 | 841 | { |
cdfcbd2c | 842 | struct dummy_hcd *dum_hcd; |
1da177e4 | 843 | |
cdfcbd2c TB |
844 | dum_hcd = gadget_to_dummy_hcd(_gadget); |
845 | if (!(dum_hcd->dum->devstatus & ((1 << USB_DEVICE_B_HNP_ENABLE) | |
5742b0c9 | 846 | | (1 << USB_DEVICE_REMOTE_WAKEUP)))) |
1da177e4 | 847 | return -EINVAL; |
cdfcbd2c | 848 | if ((dum_hcd->port_status & USB_PORT_STAT_CONNECTION) == 0) |
391eca9d | 849 | return -ENOLINK; |
cdfcbd2c TB |
850 | if ((dum_hcd->port_status & USB_PORT_STAT_SUSPEND) == 0 && |
851 | dum_hcd->rh_state != DUMMY_RH_SUSPENDED) | |
391eca9d AS |
852 | return -EIO; |
853 | ||
854 | /* FIXME: What if the root hub is suspended but the port isn't? */ | |
1da177e4 LT |
855 | |
856 | /* hub notices our request, issues downstream resume, etc */ | |
cdfcbd2c TB |
857 | dum_hcd->resuming = 1; |
858 | dum_hcd->re_timeout = jiffies + msecs_to_jiffies(20); | |
859 | mod_timer(&dummy_hcd_to_hcd(dum_hcd)->rh_timer, dum_hcd->re_timeout); | |
1da177e4 LT |
860 | return 0; |
861 | } | |
862 | ||
18f2cbaa | 863 | static int dummy_set_selfpowered(struct usb_gadget *_gadget, int value) |
1da177e4 LT |
864 | { |
865 | struct dummy *dum; | |
866 | ||
5d9cb6af | 867 | _gadget->is_selfpowered = (value != 0); |
18f2cbaa | 868 | dum = gadget_to_dummy_hcd(_gadget)->dum; |
1da177e4 LT |
869 | if (value) |
870 | dum->devstatus |= (1 << USB_DEVICE_SELF_POWERED); | |
871 | else | |
872 | dum->devstatus &= ~(1 << USB_DEVICE_SELF_POWERED); | |
873 | return 0; | |
874 | } | |
875 | ||
d262127c | 876 | static void dummy_udc_update_ep0(struct dummy *dum) |
b5738413 | 877 | { |
c6884191 | 878 | if (dum->gadget.speed == USB_SPEED_SUPER) |
b5738413 | 879 | dum->ep[0].ep.maxpacket = 9; |
c6884191 | 880 | else |
b5738413 | 881 | dum->ep[0].ep.maxpacket = 64; |
b5738413 SAS |
882 | } |
883 | ||
18f2cbaa | 884 | static int dummy_pullup(struct usb_gadget *_gadget, int value) |
f1c39fad | 885 | { |
d8a14a85 | 886 | struct dummy_hcd *dum_hcd; |
f1c39fad AS |
887 | struct dummy *dum; |
888 | unsigned long flags; | |
889 | ||
b5738413 SAS |
890 | dum = gadget_dev_to_dummy(&_gadget->dev); |
891 | ||
892 | if (value && dum->driver) { | |
893 | if (mod_data.is_super_speed) | |
7177aed4 | 894 | dum->gadget.speed = dum->driver->max_speed; |
b5738413 SAS |
895 | else if (mod_data.is_high_speed) |
896 | dum->gadget.speed = min_t(u8, USB_SPEED_HIGH, | |
7177aed4 | 897 | dum->driver->max_speed); |
b5738413 SAS |
898 | else |
899 | dum->gadget.speed = USB_SPEED_FULL; | |
d262127c | 900 | dummy_udc_update_ep0(dum); |
b5738413 | 901 | |
7177aed4 | 902 | if (dum->gadget.speed < dum->driver->max_speed) |
b5738413 | 903 | dev_dbg(udc_dev(dum), "This device can perform faster" |
7177aed4 MN |
904 | " if you connect it to a %s port...\n", |
905 | usb_speed_string(dum->driver->max_speed)); | |
b5738413 | 906 | } |
d8a14a85 | 907 | dum_hcd = gadget_to_dummy_hcd(_gadget); |
d8a14a85 | 908 | |
18f2cbaa | 909 | spin_lock_irqsave(&dum->lock, flags); |
f1c39fad | 910 | dum->pullup = (value != 0); |
d8a14a85 | 911 | set_link_state(dum_hcd); |
18f2cbaa | 912 | spin_unlock_irqrestore(&dum->lock, flags); |
b5738413 | 913 | |
d8a14a85 | 914 | usb_hcd_poll_rh_status(dummy_hcd_to_hcd(dum_hcd)); |
f1c39fad AS |
915 | return 0; |
916 | } | |
917 | ||
aa074739 SAS |
918 | static int dummy_udc_start(struct usb_gadget *g, |
919 | struct usb_gadget_driver *driver); | |
22835b80 | 920 | static int dummy_udc_stop(struct usb_gadget *g); |
0f91349b | 921 | |
1da177e4 LT |
922 | static const struct usb_gadget_ops dummy_ops = { |
923 | .get_frame = dummy_g_get_frame, | |
924 | .wakeup = dummy_wakeup, | |
925 | .set_selfpowered = dummy_set_selfpowered, | |
f1c39fad | 926 | .pullup = dummy_pullup, |
aa074739 SAS |
927 | .udc_start = dummy_udc_start, |
928 | .udc_stop = dummy_udc_stop, | |
1da177e4 LT |
929 | }; |
930 | ||
931 | /*-------------------------------------------------------------------------*/ | |
932 | ||
933 | /* "function" sysfs attribute */ | |
ce26bd23 | 934 | static ssize_t function_show(struct device *dev, struct device_attribute *attr, |
18f2cbaa | 935 | char *buf) |
1da177e4 | 936 | { |
18f2cbaa | 937 | struct dummy *dum = gadget_dev_to_dummy(dev); |
1da177e4 LT |
938 | |
939 | if (!dum->driver || !dum->driver->function) | |
940 | return 0; | |
18f2cbaa | 941 | return scnprintf(buf, PAGE_SIZE, "%s\n", dum->driver->function); |
1da177e4 | 942 | } |
ce26bd23 | 943 | static DEVICE_ATTR_RO(function); |
1da177e4 LT |
944 | |
945 | /*-------------------------------------------------------------------------*/ | |
946 | ||
947 | /* | |
948 | * Driver registration/unregistration. | |
949 | * | |
950 | * This is basically hardware-specific; there's usually only one real USB | |
951 | * device (not host) controller since that's how USB devices are intended | |
952 | * to work. So most implementations of these api calls will rely on the | |
953 | * fact that only one driver will ever bind to the hardware. But curious | |
954 | * hardware can be built with discrete components, so the gadget API doesn't | |
955 | * require that assumption. | |
956 | * | |
957 | * For this emulator, it might be convenient to create a usb slave device | |
958 | * for each driver that registers: just add to a big root hub. | |
959 | */ | |
960 | ||
aa074739 SAS |
961 | static int dummy_udc_start(struct usb_gadget *g, |
962 | struct usb_gadget_driver *driver) | |
1da177e4 | 963 | { |
aa074739 SAS |
964 | struct dummy_hcd *dum_hcd = gadget_to_dummy_hcd(g); |
965 | struct dummy *dum = dum_hcd->dum; | |
1da177e4 | 966 | |
7177aed4 | 967 | if (driver->max_speed == USB_SPEED_UNKNOWN) |
1da177e4 LT |
968 | return -EINVAL; |
969 | ||
970 | /* | |
971 | * SLAVE side init ... the layer above hardware, which | |
972 | * can't enumerate without help from the driver we're binding. | |
973 | */ | |
5742b0c9 | 974 | |
1da177e4 | 975 | dum->devstatus = 0; |
1da177e4 | 976 | dum->driver = driver; |
dd7e6dd5 | 977 | |
1da177e4 LT |
978 | return 0; |
979 | } | |
1da177e4 | 980 | |
22835b80 | 981 | static int dummy_udc_stop(struct usb_gadget *g) |
1da177e4 | 982 | { |
aa074739 SAS |
983 | struct dummy_hcd *dum_hcd = gadget_to_dummy_hcd(g); |
984 | struct dummy *dum = dum_hcd->dum; | |
1da177e4 | 985 | |
1da177e4 | 986 | dum->driver = NULL; |
25427874 | 987 | |
1da177e4 LT |
988 | return 0; |
989 | } | |
1da177e4 LT |
990 | |
991 | #undef is_enabled | |
992 | ||
d9b76251 AS |
993 | /* The gadget structure is stored inside the hcd structure and will be |
994 | * released along with it. */ | |
0fb57599 SAS |
995 | static void init_dummy_udc_hw(struct dummy *dum) |
996 | { | |
997 | int i; | |
998 | ||
999 | INIT_LIST_HEAD(&dum->gadget.ep_list); | |
1000 | for (i = 0; i < DUMMY_ENDPOINTS; i++) { | |
1001 | struct dummy_ep *ep = &dum->ep[i]; | |
1002 | ||
7a3b8e70 | 1003 | if (!ep_info[i].name) |
0fb57599 | 1004 | break; |
7a3b8e70 RB |
1005 | ep->ep.name = ep_info[i].name; |
1006 | ep->ep.caps = ep_info[i].caps; | |
0fb57599 SAS |
1007 | ep->ep.ops = &dummy_ep_ops; |
1008 | list_add_tail(&ep->ep.ep_list, &dum->gadget.ep_list); | |
1009 | ep->halted = ep->wedged = ep->already_seen = | |
1010 | ep->setup_stage = 0; | |
e117e742 | 1011 | usb_ep_set_maxpacket_limit(&ep->ep, ~0); |
c6884191 | 1012 | ep->ep.max_streams = 16; |
0fb57599 SAS |
1013 | ep->last_io = jiffies; |
1014 | ep->gadget = &dum->gadget; | |
1015 | ep->desc = NULL; | |
1016 | INIT_LIST_HEAD(&ep->queue); | |
1017 | } | |
1018 | ||
1019 | dum->gadget.ep0 = &dum->ep[0].ep; | |
1020 | list_del_init(&dum->ep[0].ep.ep_list); | |
1021 | INIT_LIST_HEAD(&dum->fifo_req.queue); | |
f8744d40 SAS |
1022 | |
1023 | #ifdef CONFIG_USB_OTG | |
1024 | dum->gadget.is_otg = 1; | |
1025 | #endif | |
0fb57599 SAS |
1026 | } |
1027 | ||
18f2cbaa | 1028 | static int dummy_udc_probe(struct platform_device *pdev) |
d9b76251 | 1029 | { |
b100a2f3 | 1030 | struct dummy *dum; |
d9b76251 AS |
1031 | int rc; |
1032 | ||
b100a2f3 | 1033 | dum = *((void **)dev_get_platdata(&pdev->dev)); |
5bbc8526 PC |
1034 | /* Clear usb_gadget region for new registration to udc-core */ |
1035 | memzero_explicit(&dum->gadget, sizeof(struct usb_gadget)); | |
d9b76251 AS |
1036 | dum->gadget.name = gadget_name; |
1037 | dum->gadget.ops = &dummy_ops; | |
d327ab5b | 1038 | dum->gadget.max_speed = USB_SPEED_SUPER; |
d9b76251 | 1039 | |
8364d6b0 | 1040 | dum->gadget.dev.parent = &pdev->dev; |
0fb57599 SAS |
1041 | init_dummy_udc_hw(dum); |
1042 | ||
0f91349b SAS |
1043 | rc = usb_add_gadget_udc(&pdev->dev, &dum->gadget); |
1044 | if (rc < 0) | |
1045 | goto err_udc; | |
1046 | ||
18f2cbaa | 1047 | rc = device_create_file(&dum->gadget.dev, &dev_attr_function); |
efd54a36 | 1048 | if (rc < 0) |
0f91349b SAS |
1049 | goto err_dev; |
1050 | platform_set_drvdata(pdev, dum); | |
1051 | return rc; | |
1052 | ||
1053 | err_dev: | |
1054 | usb_del_gadget_udc(&dum->gadget); | |
1055 | err_udc: | |
d9b76251 AS |
1056 | return rc; |
1057 | } | |
1058 | ||
18f2cbaa | 1059 | static int dummy_udc_remove(struct platform_device *pdev) |
d9b76251 | 1060 | { |
18f2cbaa | 1061 | struct dummy *dum = platform_get_drvdata(pdev); |
d9b76251 | 1062 | |
18f2cbaa | 1063 | device_remove_file(&dum->gadget.dev, &dev_attr_function); |
5f5610f6 | 1064 | usb_del_gadget_udc(&dum->gadget); |
d9b76251 AS |
1065 | return 0; |
1066 | } | |
1067 | ||
fc0b721f SAS |
1068 | static void dummy_udc_pm(struct dummy *dum, struct dummy_hcd *dum_hcd, |
1069 | int suspend) | |
391eca9d | 1070 | { |
fc0b721f SAS |
1071 | spin_lock_irq(&dum->lock); |
1072 | dum->udc_suspended = suspend; | |
d8a14a85 | 1073 | set_link_state(dum_hcd); |
fc0b721f SAS |
1074 | spin_unlock_irq(&dum->lock); |
1075 | } | |
1076 | ||
1077 | static int dummy_udc_suspend(struct platform_device *pdev, pm_message_t state) | |
1078 | { | |
1079 | struct dummy *dum = platform_get_drvdata(pdev); | |
1080 | struct dummy_hcd *dum_hcd = gadget_to_dummy_hcd(&dum->gadget); | |
391eca9d | 1081 | |
fc0b721f SAS |
1082 | dev_dbg(&pdev->dev, "%s\n", __func__); |
1083 | dummy_udc_pm(dum, dum_hcd, 1); | |
d8a14a85 | 1084 | usb_hcd_poll_rh_status(dummy_hcd_to_hcd(dum_hcd)); |
391eca9d AS |
1085 | return 0; |
1086 | } | |
1087 | ||
fc0b721f | 1088 | static int dummy_udc_resume(struct platform_device *pdev) |
391eca9d | 1089 | { |
fc0b721f SAS |
1090 | struct dummy *dum = platform_get_drvdata(pdev); |
1091 | struct dummy_hcd *dum_hcd = gadget_to_dummy_hcd(&dum->gadget); | |
391eca9d | 1092 | |
fc0b721f SAS |
1093 | dev_dbg(&pdev->dev, "%s\n", __func__); |
1094 | dummy_udc_pm(dum, dum_hcd, 0); | |
d8a14a85 | 1095 | usb_hcd_poll_rh_status(dummy_hcd_to_hcd(dum_hcd)); |
391eca9d AS |
1096 | return 0; |
1097 | } | |
1098 | ||
3ae5eaec | 1099 | static struct platform_driver dummy_udc_driver = { |
d9b76251 AS |
1100 | .probe = dummy_udc_probe, |
1101 | .remove = dummy_udc_remove, | |
391eca9d AS |
1102 | .suspend = dummy_udc_suspend, |
1103 | .resume = dummy_udc_resume, | |
3ae5eaec RK |
1104 | .driver = { |
1105 | .name = (char *) gadget_name, | |
3ae5eaec | 1106 | }, |
d9b76251 AS |
1107 | }; |
1108 | ||
1da177e4 LT |
1109 | /*-------------------------------------------------------------------------*/ |
1110 | ||
a54c979f SAS |
1111 | static unsigned int dummy_get_ep_idx(const struct usb_endpoint_descriptor *desc) |
1112 | { | |
1113 | unsigned int index; | |
1114 | ||
1115 | index = usb_endpoint_num(desc) << 1; | |
1116 | if (usb_endpoint_dir_in(desc)) | |
1117 | index |= 1; | |
1118 | return index; | |
1119 | } | |
1120 | ||
1da177e4 LT |
1121 | /* MASTER/HOST SIDE DRIVER |
1122 | * | |
1123 | * this uses the hcd framework to hook up to host side drivers. | |
1124 | * its root hub will only have one device, otherwise it acts like | |
1125 | * a normal host controller. | |
1126 | * | |
1127 | * when urbs are queued, they're just stuck on a list that we | |
1128 | * scan in a timer callback. that callback connects writes from | |
1129 | * the host with reads from the device, and so on, based on the | |
1130 | * usb 2.0 rules. | |
1131 | */ | |
1132 | ||
a54c979f SAS |
1133 | static int dummy_ep_stream_en(struct dummy_hcd *dum_hcd, struct urb *urb) |
1134 | { | |
1135 | const struct usb_endpoint_descriptor *desc = &urb->ep->desc; | |
1136 | u32 index; | |
1137 | ||
1138 | if (!usb_endpoint_xfer_bulk(desc)) | |
1139 | return 0; | |
1140 | ||
1141 | index = dummy_get_ep_idx(desc); | |
1142 | return (1 << index) & dum_hcd->stream_en_ep; | |
1143 | } | |
1144 | ||
1145 | /* | |
1146 | * The max stream number is saved as a nibble so for the 30 possible endpoints | |
1147 | * we only 15 bytes of memory. Therefore we are limited to max 16 streams (0 | |
1148 | * means we use only 1 stream). The maximum according to the spec is 16bit so | |
1149 | * if the 16 stream limit is about to go, the array size should be incremented | |
1150 | * to 30 elements of type u16. | |
1151 | */ | |
1152 | static int get_max_streams_for_pipe(struct dummy_hcd *dum_hcd, | |
1153 | unsigned int pipe) | |
1154 | { | |
1155 | int max_streams; | |
1156 | ||
1157 | max_streams = dum_hcd->num_stream[usb_pipeendpoint(pipe)]; | |
1158 | if (usb_pipeout(pipe)) | |
1159 | max_streams >>= 4; | |
1160 | else | |
1161 | max_streams &= 0xf; | |
1162 | max_streams++; | |
1163 | return max_streams; | |
1164 | } | |
1165 | ||
1166 | static void set_max_streams_for_pipe(struct dummy_hcd *dum_hcd, | |
1167 | unsigned int pipe, unsigned int streams) | |
1168 | { | |
1169 | int max_streams; | |
1170 | ||
1171 | streams--; | |
1172 | max_streams = dum_hcd->num_stream[usb_pipeendpoint(pipe)]; | |
1173 | if (usb_pipeout(pipe)) { | |
1174 | streams <<= 4; | |
1175 | max_streams &= 0xf; | |
1176 | } else { | |
1177 | max_streams &= 0xf0; | |
1178 | } | |
1179 | max_streams |= streams; | |
1180 | dum_hcd->num_stream[usb_pipeendpoint(pipe)] = max_streams; | |
1181 | } | |
1182 | ||
1183 | static int dummy_validate_stream(struct dummy_hcd *dum_hcd, struct urb *urb) | |
1184 | { | |
1185 | unsigned int max_streams; | |
1186 | int enabled; | |
1187 | ||
1188 | enabled = dummy_ep_stream_en(dum_hcd, urb); | |
1189 | if (!urb->stream_id) { | |
1190 | if (enabled) | |
1191 | return -EINVAL; | |
1192 | return 0; | |
1193 | } | |
1194 | if (!enabled) | |
1195 | return -EINVAL; | |
1196 | ||
1197 | max_streams = get_max_streams_for_pipe(dum_hcd, | |
1198 | usb_pipeendpoint(urb->pipe)); | |
1199 | if (urb->stream_id > max_streams) { | |
1200 | dev_err(dummy_dev(dum_hcd), "Stream id %d is out of range.\n", | |
1201 | urb->stream_id); | |
1202 | BUG(); | |
1203 | return -EINVAL; | |
1204 | } | |
1205 | return 0; | |
1206 | } | |
1207 | ||
18f2cbaa | 1208 | static int dummy_urb_enqueue( |
1da177e4 | 1209 | struct usb_hcd *hcd, |
1da177e4 | 1210 | struct urb *urb, |
55016f10 | 1211 | gfp_t mem_flags |
1da177e4 | 1212 | ) { |
cdfcbd2c | 1213 | struct dummy_hcd *dum_hcd; |
1da177e4 LT |
1214 | struct urbp *urbp; |
1215 | unsigned long flags; | |
e9df41c5 | 1216 | int rc; |
1da177e4 | 1217 | |
18f2cbaa | 1218 | urbp = kmalloc(sizeof *urbp, mem_flags); |
1da177e4 LT |
1219 | if (!urbp) |
1220 | return -ENOMEM; | |
1221 | urbp->urb = urb; | |
14fce33a | 1222 | urbp->miter_started = 0; |
1da177e4 | 1223 | |
cdfcbd2c TB |
1224 | dum_hcd = hcd_to_dummy_hcd(hcd); |
1225 | spin_lock_irqsave(&dum_hcd->dum->lock, flags); | |
a54c979f SAS |
1226 | |
1227 | rc = dummy_validate_stream(dum_hcd, urb); | |
1228 | if (rc) { | |
1229 | kfree(urbp); | |
1230 | goto done; | |
1231 | } | |
1232 | ||
e9df41c5 AS |
1233 | rc = usb_hcd_link_urb_to_ep(hcd, urb); |
1234 | if (rc) { | |
1235 | kfree(urbp); | |
1236 | goto done; | |
1237 | } | |
1da177e4 | 1238 | |
cdfcbd2c TB |
1239 | if (!dum_hcd->udev) { |
1240 | dum_hcd->udev = urb->dev; | |
1241 | usb_get_dev(dum_hcd->udev); | |
1242 | } else if (unlikely(dum_hcd->udev != urb->dev)) | |
1243 | dev_err(dummy_dev(dum_hcd), "usb_device address has changed!\n"); | |
1da177e4 | 1244 | |
cdfcbd2c | 1245 | list_add_tail(&urbp->urbp_list, &dum_hcd->urbp_list); |
1da177e4 | 1246 | urb->hcpriv = urbp; |
18f2cbaa | 1247 | if (usb_pipetype(urb->pipe) == PIPE_CONTROL) |
1da177e4 LT |
1248 | urb->error_count = 1; /* mark as a new urb */ |
1249 | ||
1250 | /* kick the scheduler, it'll do the rest */ | |
cdfcbd2c TB |
1251 | if (!timer_pending(&dum_hcd->timer)) |
1252 | mod_timer(&dum_hcd->timer, jiffies + 1); | |
1da177e4 | 1253 | |
e9df41c5 | 1254 | done: |
cdfcbd2c | 1255 | spin_unlock_irqrestore(&dum_hcd->dum->lock, flags); |
e9df41c5 | 1256 | return rc; |
1da177e4 LT |
1257 | } |
1258 | ||
e9df41c5 | 1259 | static int dummy_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status) |
1da177e4 | 1260 | { |
cdfcbd2c | 1261 | struct dummy_hcd *dum_hcd; |
391eca9d | 1262 | unsigned long flags; |
e9df41c5 | 1263 | int rc; |
391eca9d AS |
1264 | |
1265 | /* giveback happens automatically in timer callback, | |
1266 | * so make sure the callback happens */ | |
cdfcbd2c TB |
1267 | dum_hcd = hcd_to_dummy_hcd(hcd); |
1268 | spin_lock_irqsave(&dum_hcd->dum->lock, flags); | |
e9df41c5 AS |
1269 | |
1270 | rc = usb_hcd_check_unlink_urb(hcd, urb, status); | |
cdfcbd2c TB |
1271 | if (!rc && dum_hcd->rh_state != DUMMY_RH_RUNNING && |
1272 | !list_empty(&dum_hcd->urbp_list)) | |
1273 | mod_timer(&dum_hcd->timer, jiffies); | |
e9df41c5 | 1274 | |
cdfcbd2c | 1275 | spin_unlock_irqrestore(&dum_hcd->dum->lock, flags); |
e9df41c5 | 1276 | return rc; |
1da177e4 LT |
1277 | } |
1278 | ||
a04ce20d SAS |
1279 | static int dummy_perform_transfer(struct urb *urb, struct dummy_request *req, |
1280 | u32 len) | |
1281 | { | |
1282 | void *ubuf, *rbuf; | |
14fce33a | 1283 | struct urbp *urbp = urb->hcpriv; |
a04ce20d | 1284 | int to_host; |
14fce33a SAS |
1285 | struct sg_mapping_iter *miter = &urbp->miter; |
1286 | u32 trans = 0; | |
1287 | u32 this_sg; | |
1288 | bool next_sg; | |
a04ce20d SAS |
1289 | |
1290 | to_host = usb_pipein(urb->pipe); | |
1291 | rbuf = req->req.buf + req->req.actual; | |
a04ce20d | 1292 | |
14fce33a SAS |
1293 | if (!urb->num_sgs) { |
1294 | ubuf = urb->transfer_buffer + urb->actual_length; | |
1295 | if (to_host) | |
1296 | memcpy(ubuf, rbuf, len); | |
1297 | else | |
1298 | memcpy(rbuf, ubuf, len); | |
1299 | return len; | |
1300 | } | |
1301 | ||
1302 | if (!urbp->miter_started) { | |
1303 | u32 flags = SG_MITER_ATOMIC; | |
1304 | ||
1305 | if (to_host) | |
1306 | flags |= SG_MITER_TO_SG; | |
1307 | else | |
1308 | flags |= SG_MITER_FROM_SG; | |
1309 | ||
1310 | sg_miter_start(miter, urb->sg, urb->num_sgs, flags); | |
1311 | urbp->miter_started = 1; | |
1312 | } | |
1313 | next_sg = sg_miter_next(miter); | |
1314 | if (next_sg == false) { | |
1315 | WARN_ON_ONCE(1); | |
1316 | return -EINVAL; | |
1317 | } | |
1318 | do { | |
1319 | ubuf = miter->addr; | |
1320 | this_sg = min_t(u32, len, miter->length); | |
1321 | miter->consumed = this_sg; | |
1322 | trans += this_sg; | |
1323 | ||
1324 | if (to_host) | |
1325 | memcpy(ubuf, rbuf, this_sg); | |
1326 | else | |
1327 | memcpy(rbuf, ubuf, this_sg); | |
1328 | len -= this_sg; | |
1329 | ||
1330 | if (!len) | |
1331 | break; | |
1332 | next_sg = sg_miter_next(miter); | |
1333 | if (next_sg == false) { | |
1334 | WARN_ON_ONCE(1); | |
1335 | return -EINVAL; | |
1336 | } | |
1337 | ||
1338 | rbuf += this_sg; | |
1339 | } while (1); | |
1340 | ||
1341 | sg_miter_stop(miter); | |
1342 | return trans; | |
a04ce20d SAS |
1343 | } |
1344 | ||
1da177e4 | 1345 | /* transfer up to a frame's worth; caller must own lock */ |
a54c979f SAS |
1346 | static int transfer(struct dummy_hcd *dum_hcd, struct urb *urb, |
1347 | struct dummy_ep *ep, int limit, int *status) | |
1da177e4 | 1348 | { |
a54c979f | 1349 | struct dummy *dum = dum_hcd->dum; |
1da177e4 | 1350 | struct dummy_request *req; |
9a9ce1df | 1351 | int sent = 0; |
1da177e4 LT |
1352 | |
1353 | top: | |
1354 | /* if there's no request queued, the device is NAKing; return */ | |
18f2cbaa | 1355 | list_for_each_entry(req, &ep->queue, queue) { |
1da177e4 LT |
1356 | unsigned host_len, dev_len, len; |
1357 | int is_short, to_host; | |
1358 | int rescan = 0; | |
1359 | ||
a54c979f SAS |
1360 | if (dummy_ep_stream_en(dum_hcd, urb)) { |
1361 | if ((urb->stream_id != req->req.stream_id)) | |
1362 | continue; | |
1363 | } | |
1364 | ||
1da177e4 LT |
1365 | /* 1..N packets of ep->ep.maxpacket each ... the last one |
1366 | * may be short (including zero length). | |
1367 | * | |
1368 | * writer can send a zlp explicitly (length 0) or implicitly | |
1369 | * (length mod maxpacket zero, and 'zero' flag); they always | |
1370 | * terminate reads. | |
1371 | */ | |
1372 | host_len = urb->transfer_buffer_length - urb->actual_length; | |
1373 | dev_len = req->req.length - req->req.actual; | |
18f2cbaa | 1374 | len = min(host_len, dev_len); |
1da177e4 LT |
1375 | |
1376 | /* FIXME update emulated data toggle too */ | |
1377 | ||
18f2cbaa SAS |
1378 | to_host = usb_pipein(urb->pipe); |
1379 | if (unlikely(len == 0)) | |
1da177e4 LT |
1380 | is_short = 1; |
1381 | else { | |
1da177e4 LT |
1382 | /* not enough bandwidth left? */ |
1383 | if (limit < ep->ep.maxpacket && limit < len) | |
1384 | break; | |
18f2cbaa | 1385 | len = min_t(unsigned, len, limit); |
1da177e4 LT |
1386 | if (len == 0) |
1387 | break; | |
1388 | ||
e42bd6a5 IK |
1389 | /* send multiple of maxpacket first, then remainder */ |
1390 | if (len >= ep->ep.maxpacket) { | |
1391 | is_short = 0; | |
1392 | if (len % ep->ep.maxpacket) | |
1393 | rescan = 1; | |
1394 | len -= len % ep->ep.maxpacket; | |
1395 | } else { | |
1396 | is_short = 1; | |
1da177e4 | 1397 | } |
1da177e4 | 1398 | |
a04ce20d SAS |
1399 | len = dummy_perform_transfer(urb, req, len); |
1400 | ||
1da177e4 | 1401 | ep->last_io = jiffies; |
b1443ac0 | 1402 | if ((int)len < 0) { |
14fce33a SAS |
1403 | req->req.status = len; |
1404 | } else { | |
1405 | limit -= len; | |
9a9ce1df | 1406 | sent += len; |
14fce33a SAS |
1407 | urb->actual_length += len; |
1408 | req->req.actual += len; | |
1409 | } | |
1da177e4 LT |
1410 | } |
1411 | ||
1412 | /* short packets terminate, maybe with overflow/underflow. | |
1413 | * it's only really an error to write too much. | |
1414 | * | |
1415 | * partially filling a buffer optionally blocks queue advances | |
1416 | * (so completion handlers can clean up the queue) but we don't | |
b0d9efba | 1417 | * need to emulate such data-in-flight. |
1da177e4 LT |
1418 | */ |
1419 | if (is_short) { | |
1420 | if (host_len == dev_len) { | |
1421 | req->req.status = 0; | |
4d2f110c | 1422 | *status = 0; |
1da177e4 LT |
1423 | } else if (to_host) { |
1424 | req->req.status = 0; | |
1425 | if (dev_len > host_len) | |
4d2f110c | 1426 | *status = -EOVERFLOW; |
1da177e4 | 1427 | else |
4d2f110c | 1428 | *status = 0; |
5dda5be9 | 1429 | } else { |
4d2f110c | 1430 | *status = 0; |
1da177e4 LT |
1431 | if (host_len > dev_len) |
1432 | req->req.status = -EOVERFLOW; | |
1433 | else | |
1434 | req->req.status = 0; | |
1435 | } | |
1436 | ||
21c3ee93 IK |
1437 | /* |
1438 | * many requests terminate without a short packet. | |
1439 | * send a zlp if demanded by flags. | |
1440 | */ | |
1da177e4 | 1441 | } else { |
21c3ee93 IK |
1442 | if (req->req.length == req->req.actual) { |
1443 | if (req->req.zero && to_host) | |
1444 | rescan = 1; | |
1445 | else | |
1446 | req->req.status = 0; | |
1447 | } | |
1448 | if (urb->transfer_buffer_length == urb->actual_length) { | |
1449 | if (urb->transfer_flags & URB_ZERO_PACKET && | |
1450 | !to_host) | |
1451 | rescan = 1; | |
1452 | else | |
1453 | *status = 0; | |
1454 | } | |
1da177e4 LT |
1455 | } |
1456 | ||
1457 | /* device side completion --> continuable */ | |
1458 | if (req->req.status != -EINPROGRESS) { | |
18f2cbaa | 1459 | list_del_init(&req->queue); |
1da177e4 | 1460 | |
18f2cbaa | 1461 | spin_unlock(&dum->lock); |
304f7e5e | 1462 | usb_gadget_giveback_request(&ep->ep, &req->req); |
18f2cbaa | 1463 | spin_lock(&dum->lock); |
1da177e4 LT |
1464 | |
1465 | /* requests might have been unlinked... */ | |
1466 | rescan = 1; | |
1467 | } | |
1468 | ||
1469 | /* host side completion --> terminate */ | |
4d2f110c | 1470 | if (*status != -EINPROGRESS) |
1da177e4 LT |
1471 | break; |
1472 | ||
1473 | /* rescan to continue with any other queued i/o */ | |
1474 | if (rescan) | |
1475 | goto top; | |
1476 | } | |
9a9ce1df | 1477 | return sent; |
1da177e4 LT |
1478 | } |
1479 | ||
18f2cbaa | 1480 | static int periodic_bytes(struct dummy *dum, struct dummy_ep *ep) |
1da177e4 LT |
1481 | { |
1482 | int limit = ep->ep.maxpacket; | |
1483 | ||
1484 | if (dum->gadget.speed == USB_SPEED_HIGH) { | |
1485 | int tmp; | |
1486 | ||
1487 | /* high bandwidth mode */ | |
ee8ac855 | 1488 | tmp = usb_endpoint_maxp_mult(ep->desc); |
1da177e4 LT |
1489 | tmp *= 8 /* applies to entire frame */; |
1490 | limit += limit * tmp; | |
1491 | } | |
1cd8fd28 | 1492 | if (dum->gadget.speed == USB_SPEED_SUPER) { |
59f08e6d | 1493 | switch (usb_endpoint_type(ep->desc)) { |
1cd8fd28 TB |
1494 | case USB_ENDPOINT_XFER_ISOC: |
1495 | /* Sec. 4.4.8.2 USB3.0 Spec */ | |
1496 | limit = 3 * 16 * 1024 * 8; | |
1497 | break; | |
1498 | case USB_ENDPOINT_XFER_INT: | |
1499 | /* Sec. 4.4.7.2 USB3.0 Spec */ | |
1500 | limit = 3 * 1024 * 8; | |
1501 | break; | |
1502 | case USB_ENDPOINT_XFER_BULK: | |
1503 | default: | |
1504 | break; | |
1505 | } | |
1506 | } | |
1da177e4 LT |
1507 | return limit; |
1508 | } | |
1509 | ||
cdfcbd2c | 1510 | #define is_active(dum_hcd) ((dum_hcd->port_status & \ |
1da177e4 LT |
1511 | (USB_PORT_STAT_CONNECTION | USB_PORT_STAT_ENABLE | \ |
1512 | USB_PORT_STAT_SUSPEND)) \ | |
1513 | == (USB_PORT_STAT_CONNECTION | USB_PORT_STAT_ENABLE)) | |
1514 | ||
18f2cbaa | 1515 | static struct dummy_ep *find_endpoint(struct dummy *dum, u8 address) |
1da177e4 LT |
1516 | { |
1517 | int i; | |
1518 | ||
1cd8fd28 TB |
1519 | if (!is_active((dum->gadget.speed == USB_SPEED_SUPER ? |
1520 | dum->ss_hcd : dum->hs_hcd))) | |
1da177e4 LT |
1521 | return NULL; |
1522 | if ((address & ~USB_DIR_IN) == 0) | |
18f2cbaa | 1523 | return &dum->ep[0]; |
1da177e4 | 1524 | for (i = 1; i < DUMMY_ENDPOINTS; i++) { |
18f2cbaa | 1525 | struct dummy_ep *ep = &dum->ep[i]; |
1da177e4 LT |
1526 | |
1527 | if (!ep->desc) | |
1528 | continue; | |
1529 | if (ep->desc->bEndpointAddress == address) | |
1530 | return ep; | |
1531 | } | |
1532 | return NULL; | |
1533 | } | |
1534 | ||
1535 | #undef is_active | |
1536 | ||
1537 | #define Dev_Request (USB_TYPE_STANDARD | USB_RECIP_DEVICE) | |
1538 | #define Dev_InRequest (Dev_Request | USB_DIR_IN) | |
1539 | #define Intf_Request (USB_TYPE_STANDARD | USB_RECIP_INTERFACE) | |
1540 | #define Intf_InRequest (Intf_Request | USB_DIR_IN) | |
1541 | #define Ep_Request (USB_TYPE_STANDARD | USB_RECIP_ENDPOINT) | |
1542 | #define Ep_InRequest (Ep_Request | USB_DIR_IN) | |
1543 | ||
8be8a9d3 TB |
1544 | |
1545 | /** | |
1546 | * handle_control_request() - handles all control transfers | |
1547 | * @dum: pointer to dummy (the_controller) | |
1548 | * @urb: the urb request to handle | |
1549 | * @setup: pointer to the setup data for a USB device control | |
1550 | * request | |
1551 | * @status: pointer to request handling status | |
1552 | * | |
1553 | * Return 0 - if the request was handled | |
1554 | * 1 - if the request wasn't handles | |
1555 | * error code on error | |
1556 | */ | |
cdfcbd2c | 1557 | static int handle_control_request(struct dummy_hcd *dum_hcd, struct urb *urb, |
8be8a9d3 TB |
1558 | struct usb_ctrlrequest *setup, |
1559 | int *status) | |
1560 | { | |
1561 | struct dummy_ep *ep2; | |
cdfcbd2c | 1562 | struct dummy *dum = dum_hcd->dum; |
8be8a9d3 TB |
1563 | int ret_val = 1; |
1564 | unsigned w_index; | |
1565 | unsigned w_value; | |
1566 | ||
1567 | w_index = le16_to_cpu(setup->wIndex); | |
1568 | w_value = le16_to_cpu(setup->wValue); | |
1569 | switch (setup->bRequest) { | |
1570 | case USB_REQ_SET_ADDRESS: | |
1571 | if (setup->bRequestType != Dev_Request) | |
1572 | break; | |
1573 | dum->address = w_value; | |
1574 | *status = 0; | |
1575 | dev_dbg(udc_dev(dum), "set_address = %d\n", | |
1576 | w_value); | |
1577 | ret_val = 0; | |
1578 | break; | |
1579 | case USB_REQ_SET_FEATURE: | |
1580 | if (setup->bRequestType == Dev_Request) { | |
1581 | ret_val = 0; | |
1582 | switch (w_value) { | |
1583 | case USB_DEVICE_REMOTE_WAKEUP: | |
1584 | break; | |
1585 | case USB_DEVICE_B_HNP_ENABLE: | |
1586 | dum->gadget.b_hnp_enable = 1; | |
1587 | break; | |
1588 | case USB_DEVICE_A_HNP_SUPPORT: | |
1589 | dum->gadget.a_hnp_support = 1; | |
1590 | break; | |
1591 | case USB_DEVICE_A_ALT_HNP_SUPPORT: | |
1592 | dum->gadget.a_alt_hnp_support = 1; | |
1593 | break; | |
1cd8fd28 TB |
1594 | case USB_DEVICE_U1_ENABLE: |
1595 | if (dummy_hcd_to_hcd(dum_hcd)->speed == | |
1596 | HCD_USB3) | |
1597 | w_value = USB_DEV_STAT_U1_ENABLED; | |
1598 | else | |
1599 | ret_val = -EOPNOTSUPP; | |
1600 | break; | |
1601 | case USB_DEVICE_U2_ENABLE: | |
1602 | if (dummy_hcd_to_hcd(dum_hcd)->speed == | |
1603 | HCD_USB3) | |
1604 | w_value = USB_DEV_STAT_U2_ENABLED; | |
1605 | else | |
1606 | ret_val = -EOPNOTSUPP; | |
1607 | break; | |
1608 | case USB_DEVICE_LTM_ENABLE: | |
1609 | if (dummy_hcd_to_hcd(dum_hcd)->speed == | |
1610 | HCD_USB3) | |
1611 | w_value = USB_DEV_STAT_LTM_ENABLED; | |
1612 | else | |
1613 | ret_val = -EOPNOTSUPP; | |
1614 | break; | |
8be8a9d3 TB |
1615 | default: |
1616 | ret_val = -EOPNOTSUPP; | |
1617 | } | |
1618 | if (ret_val == 0) { | |
1619 | dum->devstatus |= (1 << w_value); | |
1620 | *status = 0; | |
1621 | } | |
1622 | } else if (setup->bRequestType == Ep_Request) { | |
1623 | /* endpoint halt */ | |
1624 | ep2 = find_endpoint(dum, w_index); | |
1625 | if (!ep2 || ep2->ep.name == ep0name) { | |
1626 | ret_val = -EOPNOTSUPP; | |
1627 | break; | |
1628 | } | |
1629 | ep2->halted = 1; | |
1630 | ret_val = 0; | |
1631 | *status = 0; | |
1632 | } | |
1633 | break; | |
1634 | case USB_REQ_CLEAR_FEATURE: | |
1635 | if (setup->bRequestType == Dev_Request) { | |
1636 | ret_val = 0; | |
1637 | switch (w_value) { | |
1638 | case USB_DEVICE_REMOTE_WAKEUP: | |
1639 | w_value = USB_DEVICE_REMOTE_WAKEUP; | |
1640 | break; | |
1cd8fd28 TB |
1641 | case USB_DEVICE_U1_ENABLE: |
1642 | if (dummy_hcd_to_hcd(dum_hcd)->speed == | |
1643 | HCD_USB3) | |
1644 | w_value = USB_DEV_STAT_U1_ENABLED; | |
1645 | else | |
1646 | ret_val = -EOPNOTSUPP; | |
1647 | break; | |
1648 | case USB_DEVICE_U2_ENABLE: | |
1649 | if (dummy_hcd_to_hcd(dum_hcd)->speed == | |
1650 | HCD_USB3) | |
1651 | w_value = USB_DEV_STAT_U2_ENABLED; | |
1652 | else | |
1653 | ret_val = -EOPNOTSUPP; | |
1654 | break; | |
1655 | case USB_DEVICE_LTM_ENABLE: | |
1656 | if (dummy_hcd_to_hcd(dum_hcd)->speed == | |
1657 | HCD_USB3) | |
1658 | w_value = USB_DEV_STAT_LTM_ENABLED; | |
1659 | else | |
1660 | ret_val = -EOPNOTSUPP; | |
1661 | break; | |
8be8a9d3 TB |
1662 | default: |
1663 | ret_val = -EOPNOTSUPP; | |
1664 | break; | |
1665 | } | |
1666 | if (ret_val == 0) { | |
1667 | dum->devstatus &= ~(1 << w_value); | |
1668 | *status = 0; | |
1669 | } | |
1670 | } else if (setup->bRequestType == Ep_Request) { | |
1671 | /* endpoint halt */ | |
1672 | ep2 = find_endpoint(dum, w_index); | |
1673 | if (!ep2) { | |
1674 | ret_val = -EOPNOTSUPP; | |
1675 | break; | |
1676 | } | |
1677 | if (!ep2->wedged) | |
1678 | ep2->halted = 0; | |
1679 | ret_val = 0; | |
1680 | *status = 0; | |
1681 | } | |
1682 | break; | |
1683 | case USB_REQ_GET_STATUS: | |
1684 | if (setup->bRequestType == Dev_InRequest | |
1685 | || setup->bRequestType == Intf_InRequest | |
1686 | || setup->bRequestType == Ep_InRequest) { | |
1687 | char *buf; | |
1688 | /* | |
1689 | * device: remote wakeup, selfpowered | |
1690 | * interface: nothing | |
1691 | * endpoint: halt | |
1692 | */ | |
1693 | buf = (char *)urb->transfer_buffer; | |
1694 | if (urb->transfer_buffer_length > 0) { | |
1695 | if (setup->bRequestType == Ep_InRequest) { | |
1696 | ep2 = find_endpoint(dum, w_index); | |
1697 | if (!ep2) { | |
1698 | ret_val = -EOPNOTSUPP; | |
1699 | break; | |
1700 | } | |
1701 | buf[0] = ep2->halted; | |
1702 | } else if (setup->bRequestType == | |
1703 | Dev_InRequest) { | |
1704 | buf[0] = (u8)dum->devstatus; | |
1705 | } else | |
1706 | buf[0] = 0; | |
1707 | } | |
1708 | if (urb->transfer_buffer_length > 1) | |
1709 | buf[1] = 0; | |
1710 | urb->actual_length = min_t(u32, 2, | |
1711 | urb->transfer_buffer_length); | |
1712 | ret_val = 0; | |
1713 | *status = 0; | |
1714 | } | |
1715 | break; | |
1716 | } | |
1717 | return ret_val; | |
1718 | } | |
1719 | ||
1da177e4 LT |
1720 | /* drive both sides of the transfers; looks like irq handlers to |
1721 | * both drivers except the callbacks aren't in_irq(). | |
1722 | */ | |
cdfcbd2c | 1723 | static void dummy_timer(unsigned long _dum_hcd) |
1da177e4 | 1724 | { |
cdfcbd2c TB |
1725 | struct dummy_hcd *dum_hcd = (struct dummy_hcd *) _dum_hcd; |
1726 | struct dummy *dum = dum_hcd->dum; | |
1da177e4 LT |
1727 | struct urbp *urbp, *tmp; |
1728 | unsigned long flags; | |
1729 | int limit, total; | |
1730 | int i; | |
1731 | ||
1732 | /* simplistic model for one frame's bandwidth */ | |
1733 | switch (dum->gadget.speed) { | |
1734 | case USB_SPEED_LOW: | |
1735 | total = 8/*bytes*/ * 12/*packets*/; | |
1736 | break; | |
1737 | case USB_SPEED_FULL: | |
1738 | total = 64/*bytes*/ * 19/*packets*/; | |
1739 | break; | |
1740 | case USB_SPEED_HIGH: | |
1741 | total = 512/*bytes*/ * 13/*packets*/ * 8/*uframes*/; | |
1742 | break; | |
1cd8fd28 TB |
1743 | case USB_SPEED_SUPER: |
1744 | /* Bus speed is 500000 bytes/ms, so use a little less */ | |
1745 | total = 490000; | |
1746 | break; | |
1da177e4 | 1747 | default: |
cdfcbd2c | 1748 | dev_err(dummy_dev(dum_hcd), "bogus device speed\n"); |
1da177e4 LT |
1749 | return; |
1750 | } | |
1751 | ||
1752 | /* FIXME if HZ != 1000 this will probably misbehave ... */ | |
1753 | ||
1754 | /* look at each urb queued by the host side driver */ | |
18f2cbaa | 1755 | spin_lock_irqsave(&dum->lock, flags); |
1da177e4 | 1756 | |
cdfcbd2c TB |
1757 | if (!dum_hcd->udev) { |
1758 | dev_err(dummy_dev(dum_hcd), | |
1da177e4 | 1759 | "timer fired with no URBs pending?\n"); |
18f2cbaa | 1760 | spin_unlock_irqrestore(&dum->lock, flags); |
1da177e4 LT |
1761 | return; |
1762 | } | |
1763 | ||
1764 | for (i = 0; i < DUMMY_ENDPOINTS; i++) { | |
7a3b8e70 | 1765 | if (!ep_info[i].name) |
1da177e4 | 1766 | break; |
18f2cbaa | 1767 | dum->ep[i].already_seen = 0; |
1da177e4 LT |
1768 | } |
1769 | ||
1770 | restart: | |
cdfcbd2c | 1771 | list_for_each_entry_safe(urbp, tmp, &dum_hcd->urbp_list, urbp_list) { |
1da177e4 LT |
1772 | struct urb *urb; |
1773 | struct dummy_request *req; | |
1774 | u8 address; | |
1775 | struct dummy_ep *ep = NULL; | |
1776 | int type; | |
4d2f110c | 1777 | int status = -EINPROGRESS; |
1da177e4 LT |
1778 | |
1779 | urb = urbp->urb; | |
eb231054 | 1780 | if (urb->unlinked) |
1da177e4 | 1781 | goto return_urb; |
cdfcbd2c | 1782 | else if (dum_hcd->rh_state != DUMMY_RH_RUNNING) |
391eca9d | 1783 | continue; |
18f2cbaa | 1784 | type = usb_pipetype(urb->pipe); |
1da177e4 LT |
1785 | |
1786 | /* used up this frame's non-periodic bandwidth? | |
1787 | * FIXME there's infinite bandwidth for control and | |
1788 | * periodic transfers ... unrealistic. | |
1789 | */ | |
1790 | if (total <= 0 && type == PIPE_BULK) | |
1791 | continue; | |
1792 | ||
1793 | /* find the gadget's ep for this request (if configured) */ | |
1794 | address = usb_pipeendpoint (urb->pipe); | |
18f2cbaa | 1795 | if (usb_pipein(urb->pipe)) |
1da177e4 LT |
1796 | address |= USB_DIR_IN; |
1797 | ep = find_endpoint(dum, address); | |
1798 | if (!ep) { | |
1799 | /* set_configuration() disagreement */ | |
cdfcbd2c | 1800 | dev_dbg(dummy_dev(dum_hcd), |
1da177e4 LT |
1801 | "no ep configured for urb %p\n", |
1802 | urb); | |
4d2f110c | 1803 | status = -EPROTO; |
1da177e4 LT |
1804 | goto return_urb; |
1805 | } | |
1806 | ||
1807 | if (ep->already_seen) | |
1808 | continue; | |
1809 | ep->already_seen = 1; | |
18f2cbaa | 1810 | if (ep == &dum->ep[0] && urb->error_count) { |
1da177e4 LT |
1811 | ep->setup_stage = 1; /* a new urb */ |
1812 | urb->error_count = 0; | |
1813 | } | |
1814 | if (ep->halted && !ep->setup_stage) { | |
1815 | /* NOTE: must not be iso! */ | |
cdfcbd2c | 1816 | dev_dbg(dummy_dev(dum_hcd), "ep %s halted, urb %p\n", |
1da177e4 | 1817 | ep->ep.name, urb); |
4d2f110c | 1818 | status = -EPIPE; |
1da177e4 LT |
1819 | goto return_urb; |
1820 | } | |
1821 | /* FIXME make sure both ends agree on maxpacket */ | |
1822 | ||
1823 | /* handle control requests */ | |
18f2cbaa | 1824 | if (ep == &dum->ep[0] && ep->setup_stage) { |
1da177e4 LT |
1825 | struct usb_ctrlrequest setup; |
1826 | int value = 1; | |
1da177e4 | 1827 | |
18f2cbaa | 1828 | setup = *(struct usb_ctrlrequest *) urb->setup_packet; |
1da177e4 | 1829 | /* paranoia, in case of stale queued data */ |
18f2cbaa SAS |
1830 | list_for_each_entry(req, &ep->queue, queue) { |
1831 | list_del_init(&req->queue); | |
1da177e4 | 1832 | req->req.status = -EOVERFLOW; |
18f2cbaa | 1833 | dev_dbg(udc_dev(dum), "stale req = %p\n", |
1da177e4 LT |
1834 | req); |
1835 | ||
18f2cbaa | 1836 | spin_unlock(&dum->lock); |
304f7e5e | 1837 | usb_gadget_giveback_request(&ep->ep, &req->req); |
18f2cbaa | 1838 | spin_lock(&dum->lock); |
1da177e4 LT |
1839 | ep->already_seen = 0; |
1840 | goto restart; | |
1841 | } | |
1842 | ||
1843 | /* gadget driver never sees set_address or operations | |
1844 | * on standard feature flags. some hardware doesn't | |
1845 | * even expose them. | |
1846 | */ | |
1847 | ep->last_io = jiffies; | |
1848 | ep->setup_stage = 0; | |
1849 | ep->halted = 0; | |
1da177e4 | 1850 | |
cdfcbd2c | 1851 | value = handle_control_request(dum_hcd, urb, &setup, |
8be8a9d3 | 1852 | &status); |
1da177e4 LT |
1853 | |
1854 | /* gadget driver handles all other requests. block | |
1855 | * until setup() returns; no reentrancy issues etc. | |
1856 | */ | |
1857 | if (value > 0) { | |
18f2cbaa SAS |
1858 | spin_unlock(&dum->lock); |
1859 | value = dum->driver->setup(&dum->gadget, | |
1da177e4 | 1860 | &setup); |
18f2cbaa | 1861 | spin_lock(&dum->lock); |
1da177e4 LT |
1862 | |
1863 | if (value >= 0) { | |
1864 | /* no delays (max 64KB data stage) */ | |
1865 | limit = 64*1024; | |
1866 | goto treat_control_like_bulk; | |
1867 | } | |
1868 | /* error, see below */ | |
1869 | } | |
1870 | ||
1871 | if (value < 0) { | |
1872 | if (value != -EOPNOTSUPP) | |
18f2cbaa | 1873 | dev_dbg(udc_dev(dum), |
1da177e4 LT |
1874 | "setup --> %d\n", |
1875 | value); | |
4d2f110c | 1876 | status = -EPIPE; |
1da177e4 LT |
1877 | urb->actual_length = 0; |
1878 | } | |
1879 | ||
1880 | goto return_urb; | |
1881 | } | |
1882 | ||
1883 | /* non-control requests */ | |
1884 | limit = total; | |
18f2cbaa | 1885 | switch (usb_pipetype(urb->pipe)) { |
1da177e4 LT |
1886 | case PIPE_ISOCHRONOUS: |
1887 | /* FIXME is it urb->interval since the last xfer? | |
1888 | * use urb->iso_frame_desc[i]. | |
1889 | * complete whether or not ep has requests queued. | |
1890 | * report random errors, to debug drivers. | |
1891 | */ | |
18f2cbaa | 1892 | limit = max(limit, periodic_bytes(dum, ep)); |
4d2f110c | 1893 | status = -ENOSYS; |
1da177e4 LT |
1894 | break; |
1895 | ||
1896 | case PIPE_INTERRUPT: | |
1897 | /* FIXME is it urb->interval since the last xfer? | |
1898 | * this almost certainly polls too fast. | |
1899 | */ | |
18f2cbaa | 1900 | limit = max(limit, periodic_bytes(dum, ep)); |
1da177e4 LT |
1901 | /* FALLTHROUGH */ |
1902 | ||
1da177e4 | 1903 | default: |
18f2cbaa | 1904 | treat_control_like_bulk: |
1da177e4 | 1905 | ep->last_io = jiffies; |
9a9ce1df | 1906 | total -= transfer(dum_hcd, urb, ep, limit, &status); |
1da177e4 LT |
1907 | break; |
1908 | } | |
1909 | ||
1910 | /* incomplete transfer? */ | |
4d2f110c | 1911 | if (status == -EINPROGRESS) |
1da177e4 LT |
1912 | continue; |
1913 | ||
1914 | return_urb: | |
18f2cbaa SAS |
1915 | list_del(&urbp->urbp_list); |
1916 | kfree(urbp); | |
1da177e4 LT |
1917 | if (ep) |
1918 | ep->already_seen = ep->setup_stage = 0; | |
1919 | ||
cdfcbd2c | 1920 | usb_hcd_unlink_urb_from_ep(dummy_hcd_to_hcd(dum_hcd), urb); |
18f2cbaa | 1921 | spin_unlock(&dum->lock); |
cdfcbd2c | 1922 | usb_hcd_giveback_urb(dummy_hcd_to_hcd(dum_hcd), urb, status); |
18f2cbaa | 1923 | spin_lock(&dum->lock); |
1da177e4 LT |
1924 | |
1925 | goto restart; | |
1926 | } | |
1927 | ||
cdfcbd2c TB |
1928 | if (list_empty(&dum_hcd->urbp_list)) { |
1929 | usb_put_dev(dum_hcd->udev); | |
1930 | dum_hcd->udev = NULL; | |
1931 | } else if (dum_hcd->rh_state == DUMMY_RH_RUNNING) { | |
391eca9d | 1932 | /* want a 1 msec delay here */ |
cdfcbd2c | 1933 | mod_timer(&dum_hcd->timer, jiffies + msecs_to_jiffies(1)); |
1da177e4 LT |
1934 | } |
1935 | ||
18f2cbaa | 1936 | spin_unlock_irqrestore(&dum->lock, flags); |
1da177e4 LT |
1937 | } |
1938 | ||
1939 | /*-------------------------------------------------------------------------*/ | |
1940 | ||
1941 | #define PORT_C_MASK \ | |
c2db8b5e AS |
1942 | ((USB_PORT_STAT_C_CONNECTION \ |
1943 | | USB_PORT_STAT_C_ENABLE \ | |
1944 | | USB_PORT_STAT_C_SUSPEND \ | |
1945 | | USB_PORT_STAT_C_OVERCURRENT \ | |
1946 | | USB_PORT_STAT_C_RESET) << 16) | |
1da177e4 | 1947 | |
18f2cbaa | 1948 | static int dummy_hub_status(struct usb_hcd *hcd, char *buf) |
1da177e4 | 1949 | { |
cdfcbd2c | 1950 | struct dummy_hcd *dum_hcd; |
1da177e4 | 1951 | unsigned long flags; |
391eca9d | 1952 | int retval = 0; |
1da177e4 | 1953 | |
cdfcbd2c | 1954 | dum_hcd = hcd_to_dummy_hcd(hcd); |
1da177e4 | 1955 | |
cdfcbd2c | 1956 | spin_lock_irqsave(&dum_hcd->dum->lock, flags); |
541c7d43 | 1957 | if (!HCD_HW_ACCESSIBLE(hcd)) |
391eca9d | 1958 | goto done; |
f1c39fad | 1959 | |
cdfcbd2c TB |
1960 | if (dum_hcd->resuming && time_after_eq(jiffies, dum_hcd->re_timeout)) { |
1961 | dum_hcd->port_status |= (USB_PORT_STAT_C_SUSPEND << 16); | |
1962 | dum_hcd->port_status &= ~USB_PORT_STAT_SUSPEND; | |
1963 | set_link_state(dum_hcd); | |
f1c39fad AS |
1964 | } |
1965 | ||
cdfcbd2c | 1966 | if ((dum_hcd->port_status & PORT_C_MASK) != 0) { |
1da177e4 | 1967 | *buf = (1 << 1); |
cdfcbd2c TB |
1968 | dev_dbg(dummy_dev(dum_hcd), "port status 0x%08x has changes\n", |
1969 | dum_hcd->port_status); | |
1da177e4 | 1970 | retval = 1; |
cdfcbd2c | 1971 | if (dum_hcd->rh_state == DUMMY_RH_SUSPENDED) |
18f2cbaa | 1972 | usb_hcd_resume_root_hub(hcd); |
1da177e4 | 1973 | } |
391eca9d | 1974 | done: |
cdfcbd2c | 1975 | spin_unlock_irqrestore(&dum_hcd->dum->lock, flags); |
1da177e4 LT |
1976 | return retval; |
1977 | } | |
1978 | ||
3b9c1c5b | 1979 | /* usb 3.0 root hub device descriptor */ |
814cf212 | 1980 | static struct { |
3b9c1c5b SAS |
1981 | struct usb_bos_descriptor bos; |
1982 | struct usb_ss_cap_descriptor ss_cap; | |
1983 | } __packed usb3_bos_desc = { | |
1984 | ||
1985 | .bos = { | |
1986 | .bLength = USB_DT_BOS_SIZE, | |
1987 | .bDescriptorType = USB_DT_BOS, | |
1988 | .wTotalLength = cpu_to_le16(sizeof(usb3_bos_desc)), | |
1989 | .bNumDeviceCaps = 1, | |
1990 | }, | |
1991 | .ss_cap = { | |
1992 | .bLength = USB_DT_USB_SS_CAP_SIZE, | |
1993 | .bDescriptorType = USB_DT_DEVICE_CAPABILITY, | |
1994 | .bDevCapabilityType = USB_SS_CAP_TYPE, | |
1995 | .wSpeedSupported = cpu_to_le16(USB_5GBPS_OPERATION), | |
1996 | .bFunctionalitySupport = ilog2(USB_5GBPS_OPERATION), | |
1997 | }, | |
1998 | }; | |
1999 | ||
1cd8fd28 TB |
2000 | static inline void |
2001 | ss_hub_descriptor(struct usb_hub_descriptor *desc) | |
2002 | { | |
2003 | memset(desc, 0, sizeof *desc); | |
2569ffd5 | 2004 | desc->bDescriptorType = USB_DT_SS_HUB; |
1cd8fd28 | 2005 | desc->bDescLength = 12; |
d906d61c SS |
2006 | desc->wHubCharacteristics = cpu_to_le16( |
2007 | HUB_CHAR_INDV_PORT_LPSM | | |
2008 | HUB_CHAR_COMMON_OCPM); | |
1cd8fd28 TB |
2009 | desc->bNbrPorts = 1; |
2010 | desc->u.ss.bHubHdrDecLat = 0x04; /* Worst case: 0.4 micro sec*/ | |
2011 | desc->u.ss.DeviceRemovable = 0xffff; | |
2012 | } | |
2013 | ||
18f2cbaa | 2014 | static inline void hub_descriptor(struct usb_hub_descriptor *desc) |
1da177e4 | 2015 | { |
18f2cbaa | 2016 | memset(desc, 0, sizeof *desc); |
2569ffd5 | 2017 | desc->bDescriptorType = USB_DT_HUB; |
1da177e4 | 2018 | desc->bDescLength = 9; |
d906d61c SS |
2019 | desc->wHubCharacteristics = cpu_to_le16( |
2020 | HUB_CHAR_INDV_PORT_LPSM | | |
2021 | HUB_CHAR_COMMON_OCPM); | |
1da177e4 | 2022 | desc->bNbrPorts = 1; |
dbe79bbe JY |
2023 | desc->u.hs.DeviceRemovable[0] = 0xff; |
2024 | desc->u.hs.DeviceRemovable[1] = 0xff; | |
1da177e4 LT |
2025 | } |
2026 | ||
18f2cbaa | 2027 | static int dummy_hub_control( |
1da177e4 LT |
2028 | struct usb_hcd *hcd, |
2029 | u16 typeReq, | |
2030 | u16 wValue, | |
2031 | u16 wIndex, | |
2032 | char *buf, | |
2033 | u16 wLength | |
2034 | ) { | |
cdfcbd2c | 2035 | struct dummy_hcd *dum_hcd; |
1da177e4 LT |
2036 | int retval = 0; |
2037 | unsigned long flags; | |
2038 | ||
541c7d43 | 2039 | if (!HCD_HW_ACCESSIBLE(hcd)) |
391eca9d AS |
2040 | return -ETIMEDOUT; |
2041 | ||
cdfcbd2c TB |
2042 | dum_hcd = hcd_to_dummy_hcd(hcd); |
2043 | ||
2044 | spin_lock_irqsave(&dum_hcd->dum->lock, flags); | |
1da177e4 LT |
2045 | switch (typeReq) { |
2046 | case ClearHubFeature: | |
2047 | break; | |
2048 | case ClearPortFeature: | |
2049 | switch (wValue) { | |
2050 | case USB_PORT_FEAT_SUSPEND: | |
1cd8fd28 TB |
2051 | if (hcd->speed == HCD_USB3) { |
2052 | dev_dbg(dummy_dev(dum_hcd), | |
2053 | "USB_PORT_FEAT_SUSPEND req not " | |
2054 | "supported for USB 3.0 roothub\n"); | |
2055 | goto error; | |
2056 | } | |
cdfcbd2c | 2057 | if (dum_hcd->port_status & USB_PORT_STAT_SUSPEND) { |
1da177e4 | 2058 | /* 20msec resume signaling */ |
cdfcbd2c TB |
2059 | dum_hcd->resuming = 1; |
2060 | dum_hcd->re_timeout = jiffies + | |
f1c39fad | 2061 | msecs_to_jiffies(20); |
1da177e4 LT |
2062 | } |
2063 | break; | |
2064 | case USB_PORT_FEAT_POWER: | |
1cd8fd28 TB |
2065 | if (hcd->speed == HCD_USB3) { |
2066 | if (dum_hcd->port_status & USB_PORT_STAT_POWER) | |
2067 | dev_dbg(dummy_dev(dum_hcd), | |
2068 | "power-off\n"); | |
2069 | } else | |
2070 | if (dum_hcd->port_status & | |
2071 | USB_SS_PORT_STAT_POWER) | |
2072 | dev_dbg(dummy_dev(dum_hcd), | |
2073 | "power-off\n"); | |
f1c39fad | 2074 | /* FALLS THROUGH */ |
1da177e4 | 2075 | default: |
cdfcbd2c TB |
2076 | dum_hcd->port_status &= ~(1 << wValue); |
2077 | set_link_state(dum_hcd); | |
1da177e4 LT |
2078 | } |
2079 | break; | |
2080 | case GetHubDescriptor: | |
1cd8fd28 TB |
2081 | if (hcd->speed == HCD_USB3 && |
2082 | (wLength < USB_DT_SS_HUB_SIZE || | |
2083 | wValue != (USB_DT_SS_HUB << 8))) { | |
2084 | dev_dbg(dummy_dev(dum_hcd), | |
2085 | "Wrong hub descriptor type for " | |
2086 | "USB 3.0 roothub.\n"); | |
2087 | goto error; | |
2088 | } | |
2089 | if (hcd->speed == HCD_USB3) | |
2090 | ss_hub_descriptor((struct usb_hub_descriptor *) buf); | |
2091 | else | |
2092 | hub_descriptor((struct usb_hub_descriptor *) buf); | |
1da177e4 | 2093 | break; |
3b9c1c5b SAS |
2094 | |
2095 | case DeviceRequest | USB_REQ_GET_DESCRIPTOR: | |
2096 | if (hcd->speed != HCD_USB3) | |
2097 | goto error; | |
2098 | ||
2099 | if ((wValue >> 8) != USB_DT_BOS) | |
2100 | goto error; | |
2101 | ||
2102 | memcpy(buf, &usb3_bos_desc, sizeof(usb3_bos_desc)); | |
2103 | retval = sizeof(usb3_bos_desc); | |
2104 | break; | |
2105 | ||
1da177e4 | 2106 | case GetHubStatus: |
18f2cbaa | 2107 | *(__le32 *) buf = cpu_to_le32(0); |
1da177e4 LT |
2108 | break; |
2109 | case GetPortStatus: | |
2110 | if (wIndex != 1) | |
2111 | retval = -EPIPE; | |
2112 | ||
2113 | /* whoever resets or resumes must GetPortStatus to | |
2114 | * complete it!! | |
2115 | */ | |
cdfcbd2c TB |
2116 | if (dum_hcd->resuming && |
2117 | time_after_eq(jiffies, dum_hcd->re_timeout)) { | |
2118 | dum_hcd->port_status |= (USB_PORT_STAT_C_SUSPEND << 16); | |
2119 | dum_hcd->port_status &= ~USB_PORT_STAT_SUSPEND; | |
1da177e4 | 2120 | } |
cdfcbd2c TB |
2121 | if ((dum_hcd->port_status & USB_PORT_STAT_RESET) != 0 && |
2122 | time_after_eq(jiffies, dum_hcd->re_timeout)) { | |
2123 | dum_hcd->port_status |= (USB_PORT_STAT_C_RESET << 16); | |
2124 | dum_hcd->port_status &= ~USB_PORT_STAT_RESET; | |
2125 | if (dum_hcd->dum->pullup) { | |
2126 | dum_hcd->port_status |= USB_PORT_STAT_ENABLE; | |
1cd8fd28 TB |
2127 | |
2128 | if (hcd->speed < HCD_USB3) { | |
2129 | switch (dum_hcd->dum->gadget.speed) { | |
2130 | case USB_SPEED_HIGH: | |
2131 | dum_hcd->port_status |= | |
2132 | USB_PORT_STAT_HIGH_SPEED; | |
2133 | break; | |
2134 | case USB_SPEED_LOW: | |
2135 | dum_hcd->dum->gadget.ep0-> | |
2136 | maxpacket = 8; | |
2137 | dum_hcd->port_status |= | |
2138 | USB_PORT_STAT_LOW_SPEED; | |
2139 | break; | |
2140 | default: | |
2141 | dum_hcd->dum->gadget.speed = | |
2142 | USB_SPEED_FULL; | |
2143 | break; | |
2144 | } | |
1da177e4 LT |
2145 | } |
2146 | } | |
2147 | } | |
cdfcbd2c | 2148 | set_link_state(dum_hcd); |
18f2cbaa SAS |
2149 | ((__le16 *) buf)[0] = cpu_to_le16(dum_hcd->port_status); |
2150 | ((__le16 *) buf)[1] = cpu_to_le16(dum_hcd->port_status >> 16); | |
1da177e4 LT |
2151 | break; |
2152 | case SetHubFeature: | |
2153 | retval = -EPIPE; | |
2154 | break; | |
2155 | case SetPortFeature: | |
2156 | switch (wValue) { | |
1cd8fd28 TB |
2157 | case USB_PORT_FEAT_LINK_STATE: |
2158 | if (hcd->speed != HCD_USB3) { | |
2159 | dev_dbg(dummy_dev(dum_hcd), | |
2160 | "USB_PORT_FEAT_LINK_STATE req not " | |
2161 | "supported for USB 2.0 roothub\n"); | |
2162 | goto error; | |
2163 | } | |
2164 | /* | |
2165 | * Since this is dummy we don't have an actual link so | |
2166 | * there is nothing to do for the SET_LINK_STATE cmd | |
2167 | */ | |
2168 | break; | |
2169 | case USB_PORT_FEAT_U1_TIMEOUT: | |
2170 | case USB_PORT_FEAT_U2_TIMEOUT: | |
2171 | /* TODO: add suspend/resume support! */ | |
2172 | if (hcd->speed != HCD_USB3) { | |
2173 | dev_dbg(dummy_dev(dum_hcd), | |
2174 | "USB_PORT_FEAT_U1/2_TIMEOUT req not " | |
2175 | "supported for USB 2.0 roothub\n"); | |
2176 | goto error; | |
2177 | } | |
2178 | break; | |
1da177e4 | 2179 | case USB_PORT_FEAT_SUSPEND: |
1cd8fd28 TB |
2180 | /* Applicable only for USB2.0 hub */ |
2181 | if (hcd->speed == HCD_USB3) { | |
2182 | dev_dbg(dummy_dev(dum_hcd), | |
2183 | "USB_PORT_FEAT_SUSPEND req not " | |
2184 | "supported for USB 3.0 roothub\n"); | |
2185 | goto error; | |
2186 | } | |
cdfcbd2c TB |
2187 | if (dum_hcd->active) { |
2188 | dum_hcd->port_status |= USB_PORT_STAT_SUSPEND; | |
f1c39fad AS |
2189 | |
2190 | /* HNP would happen here; for now we | |
2191 | * assume b_bus_req is always true. | |
2192 | */ | |
cdfcbd2c | 2193 | set_link_state(dum_hcd); |
f1c39fad | 2194 | if (((1 << USB_DEVICE_B_HNP_ENABLE) |
cdfcbd2c TB |
2195 | & dum_hcd->dum->devstatus) != 0) |
2196 | dev_dbg(dummy_dev(dum_hcd), | |
5742b0c9 | 2197 | "no HNP yet!\n"); |
1da177e4 LT |
2198 | } |
2199 | break; | |
f1c39fad | 2200 | case USB_PORT_FEAT_POWER: |
1cd8fd28 TB |
2201 | if (hcd->speed == HCD_USB3) |
2202 | dum_hcd->port_status |= USB_SS_PORT_STAT_POWER; | |
2203 | else | |
2204 | dum_hcd->port_status |= USB_PORT_STAT_POWER; | |
cdfcbd2c | 2205 | set_link_state(dum_hcd); |
f1c39fad | 2206 | break; |
1cd8fd28 TB |
2207 | case USB_PORT_FEAT_BH_PORT_RESET: |
2208 | /* Applicable only for USB3.0 hub */ | |
2209 | if (hcd->speed != HCD_USB3) { | |
2210 | dev_dbg(dummy_dev(dum_hcd), | |
2211 | "USB_PORT_FEAT_BH_PORT_RESET req not " | |
2212 | "supported for USB 2.0 roothub\n"); | |
2213 | goto error; | |
2214 | } | |
2215 | /* FALLS THROUGH */ | |
1da177e4 | 2216 | case USB_PORT_FEAT_RESET: |
f1c39fad | 2217 | /* if it's already enabled, disable */ |
1cd8fd28 TB |
2218 | if (hcd->speed == HCD_USB3) { |
2219 | dum_hcd->port_status = 0; | |
2220 | dum_hcd->port_status = | |
2221 | (USB_SS_PORT_STAT_POWER | | |
2222 | USB_PORT_STAT_CONNECTION | | |
2223 | USB_PORT_STAT_RESET); | |
2224 | } else | |
2225 | dum_hcd->port_status &= ~(USB_PORT_STAT_ENABLE | |
f1c39fad AS |
2226 | | USB_PORT_STAT_LOW_SPEED |
2227 | | USB_PORT_STAT_HIGH_SPEED); | |
cdfcbd2c TB |
2228 | /* |
2229 | * We want to reset device status. All but the | |
2230 | * Self powered feature | |
2231 | */ | |
2232 | dum_hcd->dum->devstatus &= | |
2233 | (1 << USB_DEVICE_SELF_POWERED); | |
1cd8fd28 TB |
2234 | /* |
2235 | * FIXME USB3.0: what is the correct reset signaling | |
2236 | * interval? Is it still 50msec as for HS? | |
2237 | */ | |
cdfcbd2c | 2238 | dum_hcd->re_timeout = jiffies + msecs_to_jiffies(50); |
f1c39fad | 2239 | /* FALLS THROUGH */ |
1da177e4 | 2240 | default: |
1cd8fd28 TB |
2241 | if (hcd->speed == HCD_USB3) { |
2242 | if ((dum_hcd->port_status & | |
2243 | USB_SS_PORT_STAT_POWER) != 0) { | |
2244 | dum_hcd->port_status |= (1 << wValue); | |
2245 | set_link_state(dum_hcd); | |
2246 | } | |
2247 | } else | |
2248 | if ((dum_hcd->port_status & | |
2249 | USB_PORT_STAT_POWER) != 0) { | |
2250 | dum_hcd->port_status |= (1 << wValue); | |
2251 | set_link_state(dum_hcd); | |
2252 | } | |
2253 | } | |
2254 | break; | |
2255 | case GetPortErrorCount: | |
2256 | if (hcd->speed != HCD_USB3) { | |
2257 | dev_dbg(dummy_dev(dum_hcd), | |
2258 | "GetPortErrorCount req not " | |
2259 | "supported for USB 2.0 roothub\n"); | |
2260 | goto error; | |
2261 | } | |
2262 | /* We'll always return 0 since this is a dummy hub */ | |
2263 | *(__le32 *) buf = cpu_to_le32(0); | |
2264 | break; | |
2265 | case SetHubDepth: | |
2266 | if (hcd->speed != HCD_USB3) { | |
2267 | dev_dbg(dummy_dev(dum_hcd), | |
2268 | "SetHubDepth req not supported for " | |
2269 | "USB 2.0 roothub\n"); | |
2270 | goto error; | |
1da177e4 LT |
2271 | } |
2272 | break; | |
1da177e4 | 2273 | default: |
cdfcbd2c | 2274 | dev_dbg(dummy_dev(dum_hcd), |
1da177e4 LT |
2275 | "hub control req%04x v%04x i%04x l%d\n", |
2276 | typeReq, wValue, wIndex, wLength); | |
1cd8fd28 | 2277 | error: |
1da177e4 LT |
2278 | /* "protocol stall" on error */ |
2279 | retval = -EPIPE; | |
2280 | } | |
cdfcbd2c | 2281 | spin_unlock_irqrestore(&dum_hcd->dum->lock, flags); |
685eb93f | 2282 | |
cdfcbd2c | 2283 | if ((dum_hcd->port_status & PORT_C_MASK) != 0) |
18f2cbaa | 2284 | usb_hcd_poll_rh_status(hcd); |
1da177e4 LT |
2285 | return retval; |
2286 | } | |
2287 | ||
18f2cbaa | 2288 | static int dummy_bus_suspend(struct usb_hcd *hcd) |
391eca9d | 2289 | { |
cdfcbd2c | 2290 | struct dummy_hcd *dum_hcd = hcd_to_dummy_hcd(hcd); |
391eca9d | 2291 | |
18f2cbaa | 2292 | dev_dbg(&hcd->self.root_hub->dev, "%s\n", __func__); |
3cf0a22e | 2293 | |
cdfcbd2c TB |
2294 | spin_lock_irq(&dum_hcd->dum->lock); |
2295 | dum_hcd->rh_state = DUMMY_RH_SUSPENDED; | |
2296 | set_link_state(dum_hcd); | |
3cf0a22e | 2297 | hcd->state = HC_STATE_SUSPENDED; |
cdfcbd2c | 2298 | spin_unlock_irq(&dum_hcd->dum->lock); |
391eca9d AS |
2299 | return 0; |
2300 | } | |
2301 | ||
18f2cbaa | 2302 | static int dummy_bus_resume(struct usb_hcd *hcd) |
391eca9d | 2303 | { |
cdfcbd2c | 2304 | struct dummy_hcd *dum_hcd = hcd_to_dummy_hcd(hcd); |
3cf0a22e AS |
2305 | int rc = 0; |
2306 | ||
18f2cbaa | 2307 | dev_dbg(&hcd->self.root_hub->dev, "%s\n", __func__); |
391eca9d | 2308 | |
cdfcbd2c | 2309 | spin_lock_irq(&dum_hcd->dum->lock); |
541c7d43 | 2310 | if (!HCD_HW_ACCESSIBLE(hcd)) { |
cfa59dab | 2311 | rc = -ESHUTDOWN; |
3cf0a22e | 2312 | } else { |
cdfcbd2c TB |
2313 | dum_hcd->rh_state = DUMMY_RH_RUNNING; |
2314 | set_link_state(dum_hcd); | |
2315 | if (!list_empty(&dum_hcd->urbp_list)) | |
2316 | mod_timer(&dum_hcd->timer, jiffies); | |
3cf0a22e AS |
2317 | hcd->state = HC_STATE_RUNNING; |
2318 | } | |
cdfcbd2c | 2319 | spin_unlock_irq(&dum_hcd->dum->lock); |
3cf0a22e | 2320 | return rc; |
391eca9d | 2321 | } |
1da177e4 LT |
2322 | |
2323 | /*-------------------------------------------------------------------------*/ | |
2324 | ||
18f2cbaa | 2325 | static inline ssize_t show_urb(char *buf, size_t size, struct urb *urb) |
1da177e4 | 2326 | { |
18f2cbaa | 2327 | int ep = usb_pipeendpoint(urb->pipe); |
1da177e4 | 2328 | |
18f2cbaa | 2329 | return snprintf(buf, size, |
1da177e4 LT |
2330 | "urb/%p %s ep%d%s%s len %d/%d\n", |
2331 | urb, | |
2332 | ({ char *s; | |
18f2cbaa SAS |
2333 | switch (urb->dev->speed) { |
2334 | case USB_SPEED_LOW: | |
7c884fe4 TB |
2335 | s = "ls"; |
2336 | break; | |
18f2cbaa | 2337 | case USB_SPEED_FULL: |
7c884fe4 TB |
2338 | s = "fs"; |
2339 | break; | |
18f2cbaa | 2340 | case USB_SPEED_HIGH: |
7c884fe4 TB |
2341 | s = "hs"; |
2342 | break; | |
18f2cbaa | 2343 | case USB_SPEED_SUPER: |
1cd8fd28 TB |
2344 | s = "ss"; |
2345 | break; | |
18f2cbaa | 2346 | default: |
7c884fe4 TB |
2347 | s = "?"; |
2348 | break; | |
2b84f92b | 2349 | } s; }), |
18f2cbaa | 2350 | ep, ep ? (usb_pipein(urb->pipe) ? "in" : "out") : "", |
1da177e4 | 2351 | ({ char *s; \ |
18f2cbaa SAS |
2352 | switch (usb_pipetype(urb->pipe)) { \ |
2353 | case PIPE_CONTROL: \ | |
7c884fe4 TB |
2354 | s = ""; \ |
2355 | break; \ | |
18f2cbaa | 2356 | case PIPE_BULK: \ |
7c884fe4 TB |
2357 | s = "-bulk"; \ |
2358 | break; \ | |
18f2cbaa | 2359 | case PIPE_INTERRUPT: \ |
7c884fe4 TB |
2360 | s = "-int"; \ |
2361 | break; \ | |
18f2cbaa | 2362 | default: \ |
7c884fe4 TB |
2363 | s = "-iso"; \ |
2364 | break; \ | |
2b84f92b | 2365 | } s; }), |
1da177e4 LT |
2366 | urb->actual_length, urb->transfer_buffer_length); |
2367 | } | |
2368 | ||
ce26bd23 | 2369 | static ssize_t urbs_show(struct device *dev, struct device_attribute *attr, |
18f2cbaa | 2370 | char *buf) |
1da177e4 | 2371 | { |
18f2cbaa | 2372 | struct usb_hcd *hcd = dev_get_drvdata(dev); |
cdfcbd2c | 2373 | struct dummy_hcd *dum_hcd = hcd_to_dummy_hcd(hcd); |
1da177e4 LT |
2374 | struct urbp *urbp; |
2375 | size_t size = 0; | |
2376 | unsigned long flags; | |
2377 | ||
cdfcbd2c TB |
2378 | spin_lock_irqsave(&dum_hcd->dum->lock, flags); |
2379 | list_for_each_entry(urbp, &dum_hcd->urbp_list, urbp_list) { | |
1da177e4 LT |
2380 | size_t temp; |
2381 | ||
18f2cbaa | 2382 | temp = show_urb(buf, PAGE_SIZE - size, urbp->urb); |
1da177e4 LT |
2383 | buf += temp; |
2384 | size += temp; | |
2385 | } | |
cdfcbd2c | 2386 | spin_unlock_irqrestore(&dum_hcd->dum->lock, flags); |
1da177e4 LT |
2387 | |
2388 | return size; | |
2389 | } | |
ce26bd23 | 2390 | static DEVICE_ATTR_RO(urbs); |
1da177e4 | 2391 | |
1cd8fd28 TB |
2392 | static int dummy_start_ss(struct dummy_hcd *dum_hcd) |
2393 | { | |
2394 | init_timer(&dum_hcd->timer); | |
2395 | dum_hcd->timer.function = dummy_timer; | |
2396 | dum_hcd->timer.data = (unsigned long)dum_hcd; | |
2397 | dum_hcd->rh_state = DUMMY_RH_RUNNING; | |
a54c979f | 2398 | dum_hcd->stream_en_ep = 0; |
1cd8fd28 TB |
2399 | INIT_LIST_HEAD(&dum_hcd->urbp_list); |
2400 | dummy_hcd_to_hcd(dum_hcd)->power_budget = POWER_BUDGET; | |
2401 | dummy_hcd_to_hcd(dum_hcd)->state = HC_STATE_RUNNING; | |
2402 | dummy_hcd_to_hcd(dum_hcd)->uses_new_polling = 1; | |
2403 | #ifdef CONFIG_USB_OTG | |
2404 | dummy_hcd_to_hcd(dum_hcd)->self.otg_port = 1; | |
2405 | #endif | |
2406 | return 0; | |
2407 | ||
2408 | /* FIXME 'urbs' should be a per-device thing, maybe in usbcore */ | |
2409 | return device_create_file(dummy_dev(dum_hcd), &dev_attr_urbs); | |
2410 | } | |
2411 | ||
cdfcbd2c | 2412 | static int dummy_start(struct usb_hcd *hcd) |
1da177e4 | 2413 | { |
cdfcbd2c | 2414 | struct dummy_hcd *dum_hcd = hcd_to_dummy_hcd(hcd); |
1da177e4 LT |
2415 | |
2416 | /* | |
2417 | * MASTER side init ... we emulate a root hub that'll only ever | |
2418 | * talk to one device (the slave side). Also appears in sysfs, | |
2419 | * just like more familiar pci-based HCDs. | |
2420 | */ | |
1cd8fd28 TB |
2421 | if (!usb_hcd_is_primary_hcd(hcd)) |
2422 | return dummy_start_ss(dum_hcd); | |
2423 | ||
cdfcbd2c TB |
2424 | spin_lock_init(&dum_hcd->dum->lock); |
2425 | init_timer(&dum_hcd->timer); | |
2426 | dum_hcd->timer.function = dummy_timer; | |
2427 | dum_hcd->timer.data = (unsigned long)dum_hcd; | |
2428 | dum_hcd->rh_state = DUMMY_RH_RUNNING; | |
1da177e4 | 2429 | |
cdfcbd2c | 2430 | INIT_LIST_HEAD(&dum_hcd->urbp_list); |
1da177e4 | 2431 | |
caf29f62 | 2432 | hcd->power_budget = POWER_BUDGET; |
1da177e4 | 2433 | hcd->state = HC_STATE_RUNNING; |
685eb93f | 2434 | hcd->uses_new_polling = 1; |
1da177e4 | 2435 | |
5742b0c9 AS |
2436 | #ifdef CONFIG_USB_OTG |
2437 | hcd->self.otg_port = 1; | |
2438 | #endif | |
2439 | ||
1da177e4 | 2440 | /* FIXME 'urbs' should be a per-device thing, maybe in usbcore */ |
cdfcbd2c | 2441 | return device_create_file(dummy_dev(dum_hcd), &dev_attr_urbs); |
1da177e4 LT |
2442 | } |
2443 | ||
18f2cbaa | 2444 | static void dummy_stop(struct usb_hcd *hcd) |
1da177e4 | 2445 | { |
cdfcbd2c | 2446 | device_remove_file(dummy_dev(hcd_to_dummy_hcd(hcd)), &dev_attr_urbs); |
cdfcbd2c | 2447 | dev_info(dummy_dev(hcd_to_dummy_hcd(hcd)), "stopped\n"); |
1da177e4 LT |
2448 | } |
2449 | ||
2450 | /*-------------------------------------------------------------------------*/ | |
2451 | ||
18f2cbaa | 2452 | static int dummy_h_get_frame(struct usb_hcd *hcd) |
1da177e4 | 2453 | { |
18f2cbaa | 2454 | return dummy_g_get_frame(NULL); |
1da177e4 LT |
2455 | } |
2456 | ||
cdfcbd2c TB |
2457 | static int dummy_setup(struct usb_hcd *hcd) |
2458 | { | |
b100a2f3 SAS |
2459 | struct dummy *dum; |
2460 | ||
2461 | dum = *((void **)dev_get_platdata(hcd->self.controller)); | |
14fce33a | 2462 | hcd->self.sg_tablesize = ~0; |
cdfcbd2c | 2463 | if (usb_hcd_is_primary_hcd(hcd)) { |
b100a2f3 SAS |
2464 | dum->hs_hcd = hcd_to_dummy_hcd(hcd); |
2465 | dum->hs_hcd->dum = dum; | |
1cd8fd28 TB |
2466 | /* |
2467 | * Mark the first roothub as being USB 2.0. | |
2468 | * The USB 3.0 roothub will be registered later by | |
2469 | * dummy_hcd_probe() | |
2470 | */ | |
cdfcbd2c TB |
2471 | hcd->speed = HCD_USB2; |
2472 | hcd->self.root_hub->speed = USB_SPEED_HIGH; | |
1cd8fd28 | 2473 | } else { |
b100a2f3 SAS |
2474 | dum->ss_hcd = hcd_to_dummy_hcd(hcd); |
2475 | dum->ss_hcd->dum = dum; | |
1cd8fd28 TB |
2476 | hcd->speed = HCD_USB3; |
2477 | hcd->self.root_hub->speed = USB_SPEED_SUPER; | |
cdfcbd2c TB |
2478 | } |
2479 | return 0; | |
2480 | } | |
2481 | ||
1cd8fd28 | 2482 | /* Change a group of bulk endpoints to support multiple stream IDs */ |
d81f3e4f | 2483 | static int dummy_alloc_streams(struct usb_hcd *hcd, struct usb_device *udev, |
1cd8fd28 TB |
2484 | struct usb_host_endpoint **eps, unsigned int num_eps, |
2485 | unsigned int num_streams, gfp_t mem_flags) | |
2486 | { | |
a54c979f SAS |
2487 | struct dummy_hcd *dum_hcd = hcd_to_dummy_hcd(hcd); |
2488 | unsigned long flags; | |
2489 | int max_stream; | |
2490 | int ret_streams = num_streams; | |
2491 | unsigned int index; | |
2492 | unsigned int i; | |
2493 | ||
2494 | if (!num_eps) | |
2495 | return -EINVAL; | |
2496 | ||
2497 | spin_lock_irqsave(&dum_hcd->dum->lock, flags); | |
2498 | for (i = 0; i < num_eps; i++) { | |
2499 | index = dummy_get_ep_idx(&eps[i]->desc); | |
2500 | if ((1 << index) & dum_hcd->stream_en_ep) { | |
2501 | ret_streams = -EINVAL; | |
2502 | goto out; | |
2503 | } | |
2504 | max_stream = usb_ss_max_streams(&eps[i]->ss_ep_comp); | |
2505 | if (!max_stream) { | |
2506 | ret_streams = -EINVAL; | |
2507 | goto out; | |
2508 | } | |
2509 | if (max_stream < ret_streams) { | |
2510 | dev_dbg(dummy_dev(dum_hcd), "Ep 0x%x only supports %u " | |
2511 | "stream IDs.\n", | |
2512 | eps[i]->desc.bEndpointAddress, | |
2513 | max_stream); | |
2514 | ret_streams = max_stream; | |
2515 | } | |
2516 | } | |
2517 | ||
2518 | for (i = 0; i < num_eps; i++) { | |
2519 | index = dummy_get_ep_idx(&eps[i]->desc); | |
2520 | dum_hcd->stream_en_ep |= 1 << index; | |
2521 | set_max_streams_for_pipe(dum_hcd, | |
2522 | usb_endpoint_num(&eps[i]->desc), ret_streams); | |
2523 | } | |
2524 | out: | |
2525 | spin_unlock_irqrestore(&dum_hcd->dum->lock, flags); | |
2526 | return ret_streams; | |
1cd8fd28 TB |
2527 | } |
2528 | ||
2529 | /* Reverts a group of bulk endpoints back to not using stream IDs. */ | |
d81f3e4f | 2530 | static int dummy_free_streams(struct usb_hcd *hcd, struct usb_device *udev, |
1cd8fd28 TB |
2531 | struct usb_host_endpoint **eps, unsigned int num_eps, |
2532 | gfp_t mem_flags) | |
2533 | { | |
a54c979f SAS |
2534 | struct dummy_hcd *dum_hcd = hcd_to_dummy_hcd(hcd); |
2535 | unsigned long flags; | |
2536 | int ret; | |
2537 | unsigned int index; | |
2538 | unsigned int i; | |
2539 | ||
2540 | spin_lock_irqsave(&dum_hcd->dum->lock, flags); | |
2541 | for (i = 0; i < num_eps; i++) { | |
2542 | index = dummy_get_ep_idx(&eps[i]->desc); | |
2543 | if (!((1 << index) & dum_hcd->stream_en_ep)) { | |
2544 | ret = -EINVAL; | |
2545 | goto out; | |
2546 | } | |
2547 | } | |
2548 | ||
2549 | for (i = 0; i < num_eps; i++) { | |
2550 | index = dummy_get_ep_idx(&eps[i]->desc); | |
2551 | dum_hcd->stream_en_ep &= ~(1 << index); | |
2552 | set_max_streams_for_pipe(dum_hcd, | |
2553 | usb_endpoint_num(&eps[i]->desc), 0); | |
2554 | } | |
2555 | ret = 0; | |
2556 | out: | |
2557 | spin_unlock_irqrestore(&dum_hcd->dum->lock, flags); | |
2558 | return ret; | |
1cd8fd28 TB |
2559 | } |
2560 | ||
2561 | static struct hc_driver dummy_hcd = { | |
1da177e4 LT |
2562 | .description = (char *) driver_name, |
2563 | .product_desc = "Dummy host controller", | |
cdfcbd2c | 2564 | .hcd_priv_size = sizeof(struct dummy_hcd), |
1da177e4 | 2565 | |
1cd8fd28 | 2566 | .flags = HCD_USB3 | HCD_SHARED, |
1da177e4 | 2567 | |
cdfcbd2c | 2568 | .reset = dummy_setup, |
1da177e4 LT |
2569 | .start = dummy_start, |
2570 | .stop = dummy_stop, | |
2571 | ||
18f2cbaa SAS |
2572 | .urb_enqueue = dummy_urb_enqueue, |
2573 | .urb_dequeue = dummy_urb_dequeue, | |
1da177e4 | 2574 | |
18f2cbaa | 2575 | .get_frame_number = dummy_h_get_frame, |
1da177e4 | 2576 | |
18f2cbaa SAS |
2577 | .hub_status_data = dummy_hub_status, |
2578 | .hub_control = dummy_hub_control, | |
0c0382e3 AS |
2579 | .bus_suspend = dummy_bus_suspend, |
2580 | .bus_resume = dummy_bus_resume, | |
1cd8fd28 TB |
2581 | |
2582 | .alloc_streams = dummy_alloc_streams, | |
2583 | .free_streams = dummy_free_streams, | |
1da177e4 LT |
2584 | }; |
2585 | ||
8364d6b0 | 2586 | static int dummy_hcd_probe(struct platform_device *pdev) |
1da177e4 | 2587 | { |
b100a2f3 | 2588 | struct dummy *dum; |
cdfcbd2c | 2589 | struct usb_hcd *hs_hcd; |
1cd8fd28 | 2590 | struct usb_hcd *ss_hcd; |
1da177e4 LT |
2591 | int retval; |
2592 | ||
8364d6b0 | 2593 | dev_info(&pdev->dev, "%s, driver " DRIVER_VERSION "\n", driver_desc); |
b100a2f3 | 2594 | dum = *((void **)dev_get_platdata(&pdev->dev)); |
1da177e4 | 2595 | |
1cd8fd28 TB |
2596 | if (!mod_data.is_super_speed) |
2597 | dummy_hcd.flags = HCD_USB2; | |
cdfcbd2c TB |
2598 | hs_hcd = usb_create_hcd(&dummy_hcd, &pdev->dev, dev_name(&pdev->dev)); |
2599 | if (!hs_hcd) | |
1da177e4 | 2600 | return -ENOMEM; |
cdfcbd2c | 2601 | hs_hcd->has_tt = 1; |
1da177e4 | 2602 | |
cdfcbd2c | 2603 | retval = usb_add_hcd(hs_hcd, 0, 0); |
1b68a4ca SAS |
2604 | if (retval) |
2605 | goto put_usb2_hcd; | |
1cd8fd28 TB |
2606 | |
2607 | if (mod_data.is_super_speed) { | |
2608 | ss_hcd = usb_create_shared_hcd(&dummy_hcd, &pdev->dev, | |
2609 | dev_name(&pdev->dev), hs_hcd); | |
2610 | if (!ss_hcd) { | |
2611 | retval = -ENOMEM; | |
2612 | goto dealloc_usb2_hcd; | |
2613 | } | |
2614 | ||
2615 | retval = usb_add_hcd(ss_hcd, 0, 0); | |
2616 | if (retval) | |
2617 | goto put_usb3_hcd; | |
2618 | } | |
2619 | return 0; | |
2620 | ||
2621 | put_usb3_hcd: | |
2622 | usb_put_hcd(ss_hcd); | |
2623 | dealloc_usb2_hcd: | |
1b68a4ca SAS |
2624 | usb_remove_hcd(hs_hcd); |
2625 | put_usb2_hcd: | |
1cd8fd28 | 2626 | usb_put_hcd(hs_hcd); |
b100a2f3 | 2627 | dum->hs_hcd = dum->ss_hcd = NULL; |
1da177e4 LT |
2628 | return retval; |
2629 | } | |
2630 | ||
cdfcbd2c | 2631 | static int dummy_hcd_remove(struct platform_device *pdev) |
1da177e4 | 2632 | { |
cdfcbd2c TB |
2633 | struct dummy *dum; |
2634 | ||
18f2cbaa | 2635 | dum = hcd_to_dummy_hcd(platform_get_drvdata(pdev))->dum; |
1cd8fd28 TB |
2636 | |
2637 | if (dum->ss_hcd) { | |
2638 | usb_remove_hcd(dummy_hcd_to_hcd(dum->ss_hcd)); | |
2639 | usb_put_hcd(dummy_hcd_to_hcd(dum->ss_hcd)); | |
2640 | } | |
2641 | ||
cdfcbd2c TB |
2642 | usb_remove_hcd(dummy_hcd_to_hcd(dum->hs_hcd)); |
2643 | usb_put_hcd(dummy_hcd_to_hcd(dum->hs_hcd)); | |
1cd8fd28 | 2644 | |
b100a2f3 SAS |
2645 | dum->hs_hcd = NULL; |
2646 | dum->ss_hcd = NULL; | |
1da177e4 | 2647 | |
d9b76251 | 2648 | return 0; |
1da177e4 LT |
2649 | } |
2650 | ||
18f2cbaa | 2651 | static int dummy_hcd_suspend(struct platform_device *pdev, pm_message_t state) |
391eca9d AS |
2652 | { |
2653 | struct usb_hcd *hcd; | |
cdfcbd2c | 2654 | struct dummy_hcd *dum_hcd; |
3cf0a22e | 2655 | int rc = 0; |
391eca9d | 2656 | |
18f2cbaa | 2657 | dev_dbg(&pdev->dev, "%s\n", __func__); |
391eca9d | 2658 | |
18f2cbaa | 2659 | hcd = platform_get_drvdata(pdev); |
cdfcbd2c TB |
2660 | dum_hcd = hcd_to_dummy_hcd(hcd); |
2661 | if (dum_hcd->rh_state == DUMMY_RH_RUNNING) { | |
3cf0a22e AS |
2662 | dev_warn(&pdev->dev, "Root hub isn't suspended!\n"); |
2663 | rc = -EBUSY; | |
2664 | } else | |
2665 | clear_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags); | |
2666 | return rc; | |
391eca9d AS |
2667 | } |
2668 | ||
18f2cbaa | 2669 | static int dummy_hcd_resume(struct platform_device *pdev) |
391eca9d AS |
2670 | { |
2671 | struct usb_hcd *hcd; | |
2672 | ||
18f2cbaa | 2673 | dev_dbg(&pdev->dev, "%s\n", __func__); |
391eca9d | 2674 | |
18f2cbaa | 2675 | hcd = platform_get_drvdata(pdev); |
3cf0a22e | 2676 | set_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags); |
18f2cbaa | 2677 | usb_hcd_poll_rh_status(hcd); |
391eca9d AS |
2678 | return 0; |
2679 | } | |
2680 | ||
3ae5eaec | 2681 | static struct platform_driver dummy_hcd_driver = { |
d9b76251 AS |
2682 | .probe = dummy_hcd_probe, |
2683 | .remove = dummy_hcd_remove, | |
391eca9d AS |
2684 | .suspend = dummy_hcd_suspend, |
2685 | .resume = dummy_hcd_resume, | |
3ae5eaec RK |
2686 | .driver = { |
2687 | .name = (char *) driver_name, | |
3ae5eaec | 2688 | }, |
d9b76251 | 2689 | }; |
1da177e4 | 2690 | |
d9b76251 | 2691 | /*-------------------------------------------------------------------------*/ |
b100a2f3 | 2692 | #define MAX_NUM_UDC 2 |
b2113136 SAS |
2693 | static struct platform_device *the_udc_pdev[MAX_NUM_UDC]; |
2694 | static struct platform_device *the_hcd_pdev[MAX_NUM_UDC]; | |
1da177e4 | 2695 | |
18f2cbaa | 2696 | static int __init init(void) |
1da177e4 | 2697 | { |
a89a2cd3 | 2698 | int retval = -ENOMEM; |
c7a1db45 | 2699 | int i; |
b100a2f3 | 2700 | struct dummy *dum[MAX_NUM_UDC]; |
1da177e4 | 2701 | |
18f2cbaa | 2702 | if (usb_disabled()) |
1da177e4 | 2703 | return -ENODEV; |
d9b76251 | 2704 | |
7eca4c5a TB |
2705 | if (!mod_data.is_high_speed && mod_data.is_super_speed) |
2706 | return -EINVAL; | |
2707 | ||
c7a1db45 | 2708 | if (mod_data.num < 1 || mod_data.num > MAX_NUM_UDC) { |
fa84acf0 | 2709 | pr_err("Number of emulated UDC must be in range of 1...%d\n", |
c7a1db45 SAS |
2710 | MAX_NUM_UDC); |
2711 | return -EINVAL; | |
2712 | } | |
b100a2f3 | 2713 | |
c7a1db45 SAS |
2714 | for (i = 0; i < mod_data.num; i++) { |
2715 | the_hcd_pdev[i] = platform_device_alloc(driver_name, i); | |
2716 | if (!the_hcd_pdev[i]) { | |
2717 | i--; | |
2718 | while (i >= 0) | |
2719 | platform_device_put(the_hcd_pdev[i--]); | |
2720 | return retval; | |
2721 | } | |
2722 | } | |
2723 | for (i = 0; i < mod_data.num; i++) { | |
2724 | the_udc_pdev[i] = platform_device_alloc(gadget_name, i); | |
2725 | if (!the_udc_pdev[i]) { | |
2726 | i--; | |
2727 | while (i >= 0) | |
2728 | platform_device_put(the_udc_pdev[i--]); | |
2729 | goto err_alloc_udc; | |
2730 | } | |
2731 | } | |
b100a2f3 SAS |
2732 | for (i = 0; i < mod_data.num; i++) { |
2733 | dum[i] = kzalloc(sizeof(struct dummy), GFP_KERNEL); | |
481d3042 WY |
2734 | if (!dum[i]) { |
2735 | retval = -ENOMEM; | |
b100a2f3 | 2736 | goto err_add_pdata; |
481d3042 | 2737 | } |
b100a2f3 SAS |
2738 | retval = platform_device_add_data(the_hcd_pdev[i], &dum[i], |
2739 | sizeof(void *)); | |
2740 | if (retval) | |
2741 | goto err_add_pdata; | |
2742 | retval = platform_device_add_data(the_udc_pdev[i], &dum[i], | |
2743 | sizeof(void *)); | |
2744 | if (retval) | |
2745 | goto err_add_pdata; | |
2746 | } | |
d9b76251 | 2747 | |
a89a2cd3 AS |
2748 | retval = platform_driver_register(&dummy_hcd_driver); |
2749 | if (retval < 0) | |
b100a2f3 | 2750 | goto err_add_pdata; |
a89a2cd3 | 2751 | retval = platform_driver_register(&dummy_udc_driver); |
d9b76251 AS |
2752 | if (retval < 0) |
2753 | goto err_register_udc_driver; | |
2754 | ||
c7a1db45 SAS |
2755 | for (i = 0; i < mod_data.num; i++) { |
2756 | retval = platform_device_add(the_hcd_pdev[i]); | |
2757 | if (retval < 0) { | |
2758 | i--; | |
2759 | while (i >= 0) | |
2760 | platform_device_del(the_hcd_pdev[i--]); | |
2761 | goto err_add_hcd; | |
2762 | } | |
2763 | } | |
b100a2f3 SAS |
2764 | for (i = 0; i < mod_data.num; i++) { |
2765 | if (!dum[i]->hs_hcd || | |
2766 | (!dum[i]->ss_hcd && mod_data.is_super_speed)) { | |
2767 | /* | |
2768 | * The hcd was added successfully but its probe | |
2769 | * function failed for some reason. | |
2770 | */ | |
2771 | retval = -EINVAL; | |
2772 | goto err_add_udc; | |
2773 | } | |
865835fa | 2774 | } |
c7a1db45 | 2775 | |
c7a1db45 SAS |
2776 | for (i = 0; i < mod_data.num; i++) { |
2777 | retval = platform_device_add(the_udc_pdev[i]); | |
2778 | if (retval < 0) { | |
2779 | i--; | |
2780 | while (i >= 0) | |
2781 | platform_device_del(the_udc_pdev[i]); | |
2782 | goto err_add_udc; | |
2783 | } | |
2784 | } | |
2785 | ||
2786 | for (i = 0; i < mod_data.num; i++) { | |
2787 | if (!platform_get_drvdata(the_udc_pdev[i])) { | |
2788 | /* | |
2789 | * The udc was added successfully but its probe | |
2790 | * function failed for some reason. | |
2791 | */ | |
2792 | retval = -EINVAL; | |
2793 | goto err_probe_udc; | |
2794 | } | |
865835fa | 2795 | } |
d9b76251 AS |
2796 | return retval; |
2797 | ||
865835fa | 2798 | err_probe_udc: |
c7a1db45 SAS |
2799 | for (i = 0; i < mod_data.num; i++) |
2800 | platform_device_del(the_udc_pdev[i]); | |
a89a2cd3 | 2801 | err_add_udc: |
c7a1db45 SAS |
2802 | for (i = 0; i < mod_data.num; i++) |
2803 | platform_device_del(the_hcd_pdev[i]); | |
a89a2cd3 AS |
2804 | err_add_hcd: |
2805 | platform_driver_unregister(&dummy_udc_driver); | |
d9b76251 | 2806 | err_register_udc_driver: |
a89a2cd3 | 2807 | platform_driver_unregister(&dummy_hcd_driver); |
b100a2f3 SAS |
2808 | err_add_pdata: |
2809 | for (i = 0; i < mod_data.num; i++) | |
2810 | kfree(dum[i]); | |
c7a1db45 SAS |
2811 | for (i = 0; i < mod_data.num; i++) |
2812 | platform_device_put(the_udc_pdev[i]); | |
a89a2cd3 | 2813 | err_alloc_udc: |
c7a1db45 SAS |
2814 | for (i = 0; i < mod_data.num; i++) |
2815 | platform_device_put(the_hcd_pdev[i]); | |
1da177e4 LT |
2816 | return retval; |
2817 | } | |
18f2cbaa | 2818 | module_init(init); |
1da177e4 | 2819 | |
18f2cbaa | 2820 | static void __exit cleanup(void) |
1da177e4 | 2821 | { |
c7a1db45 SAS |
2822 | int i; |
2823 | ||
2824 | for (i = 0; i < mod_data.num; i++) { | |
b100a2f3 SAS |
2825 | struct dummy *dum; |
2826 | ||
2827 | dum = *((void **)dev_get_platdata(&the_udc_pdev[i]->dev)); | |
2828 | ||
c7a1db45 SAS |
2829 | platform_device_unregister(the_udc_pdev[i]); |
2830 | platform_device_unregister(the_hcd_pdev[i]); | |
b100a2f3 | 2831 | kfree(dum); |
c7a1db45 | 2832 | } |
a89a2cd3 AS |
2833 | platform_driver_unregister(&dummy_udc_driver); |
2834 | platform_driver_unregister(&dummy_hcd_driver); | |
1da177e4 | 2835 | } |
18f2cbaa | 2836 | module_exit(cleanup); |