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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. | |
13 | * | |
14 | * This program is distributed in the hope that it will be useful, | |
15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | * GNU General Public License for more details. | |
18 | * | |
19 | * You should have received a copy of the GNU General Public License | |
20 | * along with this program; if not, write to the Free Software | |
21 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
22 | */ | |
23 | ||
24 | ||
25 | /* | |
26 | * This exposes a device side "USB gadget" API, driven by requests to a | |
27 | * Linux-USB host controller driver. USB traffic is simulated; there's | |
28 | * no need for USB hardware. Use this with two other drivers: | |
29 | * | |
30 | * - Gadget driver, responding to requests (slave); | |
31 | * - Host-side device driver, as already familiar in Linux. | |
32 | * | |
33 | * Having this all in one kernel can help some stages of development, | |
34 | * bypassing some hardware (and driver) issues. UML could help too. | |
35 | */ | |
36 | ||
1da177e4 LT |
37 | #include <linux/module.h> |
38 | #include <linux/kernel.h> | |
39 | #include <linux/delay.h> | |
40 | #include <linux/ioport.h> | |
1da177e4 | 41 | #include <linux/slab.h> |
1da177e4 LT |
42 | #include <linux/errno.h> |
43 | #include <linux/init.h> | |
44 | #include <linux/timer.h> | |
45 | #include <linux/list.h> | |
46 | #include <linux/interrupt.h> | |
d052d1be | 47 | #include <linux/platform_device.h> |
1da177e4 | 48 | #include <linux/usb.h> |
9454a57a | 49 | #include <linux/usb/gadget.h> |
27729aad | 50 | #include <linux/usb/hcd.h> |
1da177e4 LT |
51 | |
52 | #include <asm/byteorder.h> | |
53 | #include <asm/io.h> | |
54 | #include <asm/irq.h> | |
55 | #include <asm/system.h> | |
56 | #include <asm/unaligned.h> | |
57 | ||
58 | ||
1da177e4 | 59 | #define DRIVER_DESC "USB Host+Gadget Emulator" |
391eca9d | 60 | #define DRIVER_VERSION "02 May 2005" |
1da177e4 | 61 | |
caf29f62 AS |
62 | #define POWER_BUDGET 500 /* in mA; use 8 for low-power port testing */ |
63 | ||
1da177e4 LT |
64 | static const char driver_name [] = "dummy_hcd"; |
65 | static const char driver_desc [] = "USB Host+Gadget Emulator"; | |
66 | ||
67 | static const char gadget_name [] = "dummy_udc"; | |
68 | ||
69 | MODULE_DESCRIPTION (DRIVER_DESC); | |
70 | MODULE_AUTHOR ("David Brownell"); | |
71 | MODULE_LICENSE ("GPL"); | |
72 | ||
1cd8fd28 TB |
73 | struct dummy_hcd_module_parameters { |
74 | bool is_super_speed; | |
7eca4c5a | 75 | bool is_high_speed; |
1cd8fd28 TB |
76 | }; |
77 | ||
78 | static struct dummy_hcd_module_parameters mod_data = { | |
7eca4c5a TB |
79 | .is_super_speed = false, |
80 | .is_high_speed = true, | |
1cd8fd28 TB |
81 | }; |
82 | module_param_named(is_super_speed, mod_data.is_super_speed, bool, S_IRUGO); | |
83 | MODULE_PARM_DESC(is_super_speed, "true to simulate SuperSpeed connection"); | |
7eca4c5a TB |
84 | module_param_named(is_high_speed, mod_data.is_high_speed, bool, S_IRUGO); |
85 | MODULE_PARM_DESC(is_high_speed, "true to simulate HighSpeed connection"); | |
1da177e4 LT |
86 | /*-------------------------------------------------------------------------*/ |
87 | ||
88 | /* gadget side driver data structres */ | |
89 | struct dummy_ep { | |
90 | struct list_head queue; | |
91 | unsigned long last_io; /* jiffies timestamp */ | |
92 | struct usb_gadget *gadget; | |
93 | const struct usb_endpoint_descriptor *desc; | |
94 | struct usb_ep ep; | |
95 | unsigned halted : 1; | |
851a526d | 96 | unsigned wedged : 1; |
1da177e4 LT |
97 | unsigned already_seen : 1; |
98 | unsigned setup_stage : 1; | |
99 | }; | |
100 | ||
101 | struct dummy_request { | |
102 | struct list_head queue; /* ep's requests */ | |
103 | struct usb_request req; | |
104 | }; | |
105 | ||
106 | static inline struct dummy_ep *usb_ep_to_dummy_ep (struct usb_ep *_ep) | |
107 | { | |
108 | return container_of (_ep, struct dummy_ep, ep); | |
109 | } | |
110 | ||
111 | static inline struct dummy_request *usb_request_to_dummy_request | |
112 | (struct usb_request *_req) | |
113 | { | |
114 | return container_of (_req, struct dummy_request, req); | |
115 | } | |
116 | ||
117 | /*-------------------------------------------------------------------------*/ | |
118 | ||
119 | /* | |
120 | * Every device has ep0 for control requests, plus up to 30 more endpoints, | |
121 | * in one of two types: | |
122 | * | |
123 | * - Configurable: direction (in/out), type (bulk, iso, etc), and endpoint | |
124 | * number can be changed. Names like "ep-a" are used for this type. | |
125 | * | |
126 | * - Fixed Function: in other cases. some characteristics may be mutable; | |
127 | * that'd be hardware-specific. Names like "ep12out-bulk" are used. | |
128 | * | |
129 | * Gadget drivers are responsible for not setting up conflicting endpoint | |
130 | * configurations, illegal or unsupported packet lengths, and so on. | |
131 | */ | |
132 | ||
133 | static const char ep0name [] = "ep0"; | |
134 | ||
135 | static const char *const ep_name [] = { | |
136 | ep0name, /* everyone has ep0 */ | |
137 | ||
138 | /* act like a net2280: high speed, six configurable endpoints */ | |
139 | "ep-a", "ep-b", "ep-c", "ep-d", "ep-e", "ep-f", | |
140 | ||
141 | /* or like pxa250: fifteen fixed function endpoints */ | |
142 | "ep1in-bulk", "ep2out-bulk", "ep3in-iso", "ep4out-iso", "ep5in-int", | |
143 | "ep6in-bulk", "ep7out-bulk", "ep8in-iso", "ep9out-iso", "ep10in-int", | |
144 | "ep11in-bulk", "ep12out-bulk", "ep13in-iso", "ep14out-iso", | |
145 | "ep15in-int", | |
146 | ||
147 | /* or like sa1100: two fixed function endpoints */ | |
148 | "ep1out-bulk", "ep2in-bulk", | |
149 | }; | |
52950ed4 | 150 | #define DUMMY_ENDPOINTS ARRAY_SIZE(ep_name) |
1da177e4 | 151 | |
d9b76251 AS |
152 | /*-------------------------------------------------------------------------*/ |
153 | ||
1da177e4 LT |
154 | #define FIFO_SIZE 64 |
155 | ||
156 | struct urbp { | |
157 | struct urb *urb; | |
158 | struct list_head urbp_list; | |
159 | }; | |
160 | ||
391eca9d AS |
161 | |
162 | enum dummy_rh_state { | |
163 | DUMMY_RH_RESET, | |
164 | DUMMY_RH_SUSPENDED, | |
165 | DUMMY_RH_RUNNING | |
166 | }; | |
167 | ||
cdfcbd2c TB |
168 | struct dummy_hcd { |
169 | struct dummy *dum; | |
170 | enum dummy_rh_state rh_state; | |
171 | struct timer_list timer; | |
172 | u32 port_status; | |
173 | u32 old_status; | |
174 | unsigned long re_timeout; | |
175 | ||
176 | struct usb_device *udev; | |
177 | struct list_head urbp_list; | |
178 | ||
179 | unsigned active:1; | |
180 | unsigned old_active:1; | |
181 | unsigned resuming:1; | |
182 | }; | |
183 | ||
1da177e4 LT |
184 | struct dummy { |
185 | spinlock_t lock; | |
186 | ||
187 | /* | |
188 | * SLAVE/GADGET side support | |
189 | */ | |
190 | struct dummy_ep ep [DUMMY_ENDPOINTS]; | |
191 | int address; | |
192 | struct usb_gadget gadget; | |
193 | struct usb_gadget_driver *driver; | |
194 | struct dummy_request fifo_req; | |
195 | u8 fifo_buf [FIFO_SIZE]; | |
196 | u16 devstatus; | |
391eca9d | 197 | unsigned udc_suspended:1; |
f1c39fad | 198 | unsigned pullup:1; |
1da177e4 LT |
199 | |
200 | /* | |
201 | * MASTER/HOST side support | |
202 | */ | |
cdfcbd2c | 203 | struct dummy_hcd *hs_hcd; |
1cd8fd28 | 204 | struct dummy_hcd *ss_hcd; |
1da177e4 LT |
205 | }; |
206 | ||
cdfcbd2c | 207 | static inline struct dummy_hcd *hcd_to_dummy_hcd(struct usb_hcd *hcd) |
1da177e4 | 208 | { |
cdfcbd2c | 209 | return (struct dummy_hcd *) (hcd->hcd_priv); |
1da177e4 LT |
210 | } |
211 | ||
cdfcbd2c | 212 | static inline struct usb_hcd *dummy_hcd_to_hcd(struct dummy_hcd *dum) |
1da177e4 LT |
213 | { |
214 | return container_of((void *) dum, struct usb_hcd, hcd_priv); | |
215 | } | |
216 | ||
cdfcbd2c | 217 | static inline struct device *dummy_dev(struct dummy_hcd *dum) |
1da177e4 | 218 | { |
cdfcbd2c | 219 | return dummy_hcd_to_hcd(dum)->self.controller; |
1da177e4 LT |
220 | } |
221 | ||
d9b76251 AS |
222 | static inline struct device *udc_dev (struct dummy *dum) |
223 | { | |
224 | return dum->gadget.dev.parent; | |
225 | } | |
226 | ||
1da177e4 LT |
227 | static inline struct dummy *ep_to_dummy (struct dummy_ep *ep) |
228 | { | |
229 | return container_of (ep->gadget, struct dummy, gadget); | |
230 | } | |
231 | ||
cdfcbd2c | 232 | static inline struct dummy_hcd *gadget_to_dummy_hcd(struct usb_gadget *gadget) |
1da177e4 | 233 | { |
cdfcbd2c | 234 | struct dummy *dum = container_of(gadget, struct dummy, gadget); |
1cd8fd28 TB |
235 | if (dum->gadget.speed == USB_SPEED_SUPER) |
236 | return dum->ss_hcd; | |
237 | else | |
238 | return dum->hs_hcd; | |
1da177e4 LT |
239 | } |
240 | ||
241 | static inline struct dummy *gadget_dev_to_dummy (struct device *dev) | |
242 | { | |
243 | return container_of (dev, struct dummy, gadget.dev); | |
244 | } | |
245 | ||
cdfcbd2c | 246 | static struct dummy the_controller; |
1da177e4 LT |
247 | |
248 | /*-------------------------------------------------------------------------*/ | |
249 | ||
f1c39fad AS |
250 | /* SLAVE/GADGET SIDE UTILITY ROUTINES */ |
251 | ||
252 | /* called with spinlock held */ | |
253 | static void nuke (struct dummy *dum, struct dummy_ep *ep) | |
254 | { | |
255 | while (!list_empty (&ep->queue)) { | |
256 | struct dummy_request *req; | |
257 | ||
258 | req = list_entry (ep->queue.next, struct dummy_request, queue); | |
259 | list_del_init (&req->queue); | |
260 | req->req.status = -ESHUTDOWN; | |
261 | ||
262 | spin_unlock (&dum->lock); | |
263 | req->req.complete (&ep->ep, &req->req); | |
264 | spin_lock (&dum->lock); | |
265 | } | |
266 | } | |
267 | ||
268 | /* caller must hold lock */ | |
269 | static void | |
270 | stop_activity (struct dummy *dum) | |
271 | { | |
272 | struct dummy_ep *ep; | |
273 | ||
274 | /* prevent any more requests */ | |
275 | dum->address = 0; | |
276 | ||
277 | /* The timer is left running so that outstanding URBs can fail */ | |
278 | ||
279 | /* nuke any pending requests first, so driver i/o is quiesced */ | |
280 | list_for_each_entry (ep, &dum->gadget.ep_list, ep.ep_list) | |
281 | nuke (dum, ep); | |
282 | ||
283 | /* driver now does any non-usb quiescing necessary */ | |
284 | } | |
285 | ||
1cd8fd28 TB |
286 | /** |
287 | * set_link_state_by_speed() - Sets the current state of the link according to | |
288 | * the hcd speed | |
289 | * @dum_hcd: pointer to the dummy_hcd structure to update the link state for | |
290 | * | |
291 | * This function updates the port_status according to the link state and the | |
292 | * speed of the hcd. | |
293 | */ | |
294 | static void set_link_state_by_speed(struct dummy_hcd *dum_hcd) | |
295 | { | |
296 | struct dummy *dum = dum_hcd->dum; | |
297 | ||
298 | if (dummy_hcd_to_hcd(dum_hcd)->speed == HCD_USB3) { | |
299 | if ((dum_hcd->port_status & USB_SS_PORT_STAT_POWER) == 0) { | |
300 | dum_hcd->port_status = 0; | |
301 | } else if (!dum->pullup || dum->udc_suspended) { | |
302 | /* UDC suspend must cause a disconnect */ | |
303 | dum_hcd->port_status &= ~(USB_PORT_STAT_CONNECTION | | |
304 | USB_PORT_STAT_ENABLE); | |
305 | if ((dum_hcd->old_status & | |
306 | USB_PORT_STAT_CONNECTION) != 0) | |
307 | dum_hcd->port_status |= | |
308 | (USB_PORT_STAT_C_CONNECTION << 16); | |
309 | } else { | |
310 | /* device is connected and not suspended */ | |
311 | dum_hcd->port_status |= (USB_PORT_STAT_CONNECTION | | |
312 | USB_PORT_STAT_SPEED_5GBPS) ; | |
313 | if ((dum_hcd->old_status & | |
314 | USB_PORT_STAT_CONNECTION) == 0) | |
315 | dum_hcd->port_status |= | |
316 | (USB_PORT_STAT_C_CONNECTION << 16); | |
317 | if ((dum_hcd->port_status & | |
318 | USB_PORT_STAT_ENABLE) == 1 && | |
319 | (dum_hcd->port_status & | |
320 | USB_SS_PORT_LS_U0) == 1 && | |
321 | dum_hcd->rh_state != DUMMY_RH_SUSPENDED) | |
322 | dum_hcd->active = 1; | |
323 | } | |
324 | } else { | |
325 | if ((dum_hcd->port_status & USB_PORT_STAT_POWER) == 0) { | |
326 | dum_hcd->port_status = 0; | |
327 | } else if (!dum->pullup || dum->udc_suspended) { | |
328 | /* UDC suspend must cause a disconnect */ | |
329 | dum_hcd->port_status &= ~(USB_PORT_STAT_CONNECTION | | |
330 | USB_PORT_STAT_ENABLE | | |
331 | USB_PORT_STAT_LOW_SPEED | | |
332 | USB_PORT_STAT_HIGH_SPEED | | |
333 | USB_PORT_STAT_SUSPEND); | |
334 | if ((dum_hcd->old_status & | |
335 | USB_PORT_STAT_CONNECTION) != 0) | |
336 | dum_hcd->port_status |= | |
337 | (USB_PORT_STAT_C_CONNECTION << 16); | |
338 | } else { | |
339 | dum_hcd->port_status |= USB_PORT_STAT_CONNECTION; | |
340 | if ((dum_hcd->old_status & | |
341 | USB_PORT_STAT_CONNECTION) == 0) | |
342 | dum_hcd->port_status |= | |
343 | (USB_PORT_STAT_C_CONNECTION << 16); | |
344 | if ((dum_hcd->port_status & USB_PORT_STAT_ENABLE) == 0) | |
345 | dum_hcd->port_status &= ~USB_PORT_STAT_SUSPEND; | |
346 | else if ((dum_hcd->port_status & | |
347 | USB_PORT_STAT_SUSPEND) == 0 && | |
348 | dum_hcd->rh_state != DUMMY_RH_SUSPENDED) | |
349 | dum_hcd->active = 1; | |
350 | } | |
351 | } | |
352 | } | |
353 | ||
f1c39fad | 354 | /* caller must hold lock */ |
cdfcbd2c | 355 | static void set_link_state(struct dummy_hcd *dum_hcd) |
f1c39fad | 356 | { |
cdfcbd2c TB |
357 | struct dummy *dum = dum_hcd->dum; |
358 | ||
359 | dum_hcd->active = 0; | |
1cd8fd28 TB |
360 | if (dum->pullup) |
361 | if ((dummy_hcd_to_hcd(dum_hcd)->speed == HCD_USB3 && | |
362 | dum->gadget.speed != USB_SPEED_SUPER) || | |
363 | (dummy_hcd_to_hcd(dum_hcd)->speed != HCD_USB3 && | |
364 | dum->gadget.speed == USB_SPEED_SUPER)) | |
365 | return; | |
366 | ||
367 | set_link_state_by_speed(dum_hcd); | |
f1c39fad | 368 | |
cdfcbd2c TB |
369 | if ((dum_hcd->port_status & USB_PORT_STAT_ENABLE) == 0 || |
370 | dum_hcd->active) | |
371 | dum_hcd->resuming = 0; | |
f1c39fad | 372 | |
1cd8fd28 | 373 | /* if !connected or reset */ |
cdfcbd2c TB |
374 | if ((dum_hcd->port_status & USB_PORT_STAT_CONNECTION) == 0 || |
375 | (dum_hcd->port_status & USB_PORT_STAT_RESET) != 0) { | |
1cd8fd28 TB |
376 | /* |
377 | * We're connected and not reset (reset occurred now), | |
378 | * and driver attached - disconnect! | |
379 | */ | |
cdfcbd2c | 380 | if ((dum_hcd->old_status & USB_PORT_STAT_CONNECTION) != 0 && |
1cd8fd28 TB |
381 | (dum_hcd->old_status & USB_PORT_STAT_RESET) == 0 && |
382 | dum->driver) { | |
383 | stop_activity(dum); | |
384 | spin_unlock(&dum->lock); | |
385 | dum->driver->disconnect(&dum->gadget); | |
386 | spin_lock(&dum->lock); | |
f1c39fad | 387 | } |
cdfcbd2c TB |
388 | } else if (dum_hcd->active != dum_hcd->old_active) { |
389 | if (dum_hcd->old_active && dum->driver->suspend) { | |
1cd8fd28 TB |
390 | spin_unlock(&dum->lock); |
391 | dum->driver->suspend(&dum->gadget); | |
392 | spin_lock(&dum->lock); | |
393 | } else if (!dum_hcd->old_active && dum->driver->resume) { | |
394 | spin_unlock(&dum->lock); | |
395 | dum->driver->resume(&dum->gadget); | |
396 | spin_lock(&dum->lock); | |
f1c39fad AS |
397 | } |
398 | } | |
399 | ||
cdfcbd2c TB |
400 | dum_hcd->old_status = dum_hcd->port_status; |
401 | dum_hcd->old_active = dum_hcd->active; | |
f1c39fad AS |
402 | } |
403 | ||
404 | /*-------------------------------------------------------------------------*/ | |
405 | ||
1da177e4 LT |
406 | /* SLAVE/GADGET SIDE DRIVER |
407 | * | |
408 | * This only tracks gadget state. All the work is done when the host | |
409 | * side tries some (emulated) i/o operation. Real device controller | |
410 | * drivers would do real i/o using dma, fifos, irqs, timers, etc. | |
411 | */ | |
412 | ||
413 | #define is_enabled(dum) \ | |
414 | (dum->port_status & USB_PORT_STAT_ENABLE) | |
415 | ||
416 | static int | |
417 | dummy_enable (struct usb_ep *_ep, const struct usb_endpoint_descriptor *desc) | |
418 | { | |
419 | struct dummy *dum; | |
cdfcbd2c | 420 | struct dummy_hcd *dum_hcd; |
1da177e4 LT |
421 | struct dummy_ep *ep; |
422 | unsigned max; | |
423 | int retval; | |
424 | ||
425 | ep = usb_ep_to_dummy_ep (_ep); | |
426 | if (!_ep || !desc || ep->desc || _ep->name == ep0name | |
427 | || desc->bDescriptorType != USB_DT_ENDPOINT) | |
428 | return -EINVAL; | |
429 | dum = ep_to_dummy (ep); | |
cdfcbd2c TB |
430 | if (!dum->driver) |
431 | return -ESHUTDOWN; | |
719e52cb SAS |
432 | |
433 | dum_hcd = gadget_to_dummy_hcd(&dum->gadget); | |
cdfcbd2c | 434 | if (!is_enabled(dum_hcd)) |
1da177e4 | 435 | return -ESHUTDOWN; |
cdfcbd2c TB |
436 | |
437 | /* | |
438 | * For HS/FS devices only bits 0..10 of the wMaxPacketSize represent the | |
439 | * maximum packet size. | |
1cd8fd28 | 440 | * For SS devices the wMaxPacketSize is limited by 1024. |
cdfcbd2c TB |
441 | */ |
442 | max = le16_to_cpu(desc->wMaxPacketSize) & 0x7ff; | |
1da177e4 LT |
443 | |
444 | /* drivers must not request bad settings, since lower levels | |
445 | * (hardware or its drivers) may not check. some endpoints | |
446 | * can't do iso, many have maxpacket limitations, etc. | |
447 | * | |
448 | * since this "hardware" driver is here to help debugging, we | |
449 | * have some extra sanity checks. (there could be more though, | |
450 | * especially for "ep9out" style fixed function ones.) | |
451 | */ | |
452 | retval = -EINVAL; | |
453 | switch (desc->bmAttributes & 0x03) { | |
454 | case USB_ENDPOINT_XFER_BULK: | |
455 | if (strstr (ep->ep.name, "-iso") | |
456 | || strstr (ep->ep.name, "-int")) { | |
457 | goto done; | |
458 | } | |
459 | switch (dum->gadget.speed) { | |
1cd8fd28 TB |
460 | case USB_SPEED_SUPER: |
461 | if (max == 1024) | |
462 | break; | |
463 | goto done; | |
1da177e4 LT |
464 | case USB_SPEED_HIGH: |
465 | if (max == 512) | |
466 | break; | |
9063ff44 IL |
467 | goto done; |
468 | case USB_SPEED_FULL: | |
469 | if (max == 8 || max == 16 || max == 32 || max == 64) | |
1da177e4 LT |
470 | /* we'll fake any legal size */ |
471 | break; | |
9063ff44 IL |
472 | /* save a return statement */ |
473 | default: | |
474 | goto done; | |
1da177e4 LT |
475 | } |
476 | break; | |
477 | case USB_ENDPOINT_XFER_INT: | |
478 | if (strstr (ep->ep.name, "-iso")) /* bulk is ok */ | |
479 | goto done; | |
480 | /* real hardware might not handle all packet sizes */ | |
481 | switch (dum->gadget.speed) { | |
1cd8fd28 | 482 | case USB_SPEED_SUPER: |
1da177e4 LT |
483 | case USB_SPEED_HIGH: |
484 | if (max <= 1024) | |
485 | break; | |
486 | /* save a return statement */ | |
487 | case USB_SPEED_FULL: | |
488 | if (max <= 64) | |
489 | break; | |
490 | /* save a return statement */ | |
491 | default: | |
492 | if (max <= 8) | |
493 | break; | |
494 | goto done; | |
495 | } | |
496 | break; | |
497 | case USB_ENDPOINT_XFER_ISOC: | |
498 | if (strstr (ep->ep.name, "-bulk") | |
499 | || strstr (ep->ep.name, "-int")) | |
500 | goto done; | |
501 | /* real hardware might not handle all packet sizes */ | |
502 | switch (dum->gadget.speed) { | |
1cd8fd28 | 503 | case USB_SPEED_SUPER: |
1da177e4 LT |
504 | case USB_SPEED_HIGH: |
505 | if (max <= 1024) | |
506 | break; | |
507 | /* save a return statement */ | |
508 | case USB_SPEED_FULL: | |
509 | if (max <= 1023) | |
510 | break; | |
511 | /* save a return statement */ | |
512 | default: | |
513 | goto done; | |
514 | } | |
515 | break; | |
516 | default: | |
517 | /* few chips support control except on ep0 */ | |
518 | goto done; | |
519 | } | |
520 | ||
521 | _ep->maxpacket = max; | |
522 | ep->desc = desc; | |
523 | ||
d9b76251 | 524 | dev_dbg (udc_dev(dum), "enabled %s (ep%d%s-%s) maxpacket %d\n", |
1da177e4 LT |
525 | _ep->name, |
526 | desc->bEndpointAddress & 0x0f, | |
527 | (desc->bEndpointAddress & USB_DIR_IN) ? "in" : "out", | |
528 | ({ char *val; | |
529 | switch (desc->bmAttributes & 0x03) { | |
7c884fe4 TB |
530 | case USB_ENDPOINT_XFER_BULK: |
531 | val = "bulk"; | |
532 | break; | |
533 | case USB_ENDPOINT_XFER_ISOC: | |
534 | val = "iso"; | |
535 | break; | |
536 | case USB_ENDPOINT_XFER_INT: | |
537 | val = "intr"; | |
538 | break; | |
539 | default: | |
540 | val = "ctrl"; | |
541 | break; | |
1da177e4 LT |
542 | }; val; }), |
543 | max); | |
544 | ||
545 | /* at this point real hardware should be NAKing transfers | |
546 | * to that endpoint, until a buffer is queued to it. | |
547 | */ | |
851a526d | 548 | ep->halted = ep->wedged = 0; |
1da177e4 LT |
549 | retval = 0; |
550 | done: | |
551 | return retval; | |
552 | } | |
553 | ||
1da177e4 LT |
554 | static int dummy_disable (struct usb_ep *_ep) |
555 | { | |
556 | struct dummy_ep *ep; | |
557 | struct dummy *dum; | |
558 | unsigned long flags; | |
559 | int retval; | |
560 | ||
561 | ep = usb_ep_to_dummy_ep (_ep); | |
562 | if (!_ep || !ep->desc || _ep->name == ep0name) | |
563 | return -EINVAL; | |
564 | dum = ep_to_dummy (ep); | |
565 | ||
566 | spin_lock_irqsave (&dum->lock, flags); | |
567 | ep->desc = NULL; | |
568 | retval = 0; | |
569 | nuke (dum, ep); | |
570 | spin_unlock_irqrestore (&dum->lock, flags); | |
571 | ||
d9b76251 | 572 | dev_dbg (udc_dev(dum), "disabled %s\n", _ep->name); |
1da177e4 LT |
573 | return retval; |
574 | } | |
575 | ||
576 | static struct usb_request * | |
55016f10 | 577 | dummy_alloc_request (struct usb_ep *_ep, gfp_t mem_flags) |
1da177e4 LT |
578 | { |
579 | struct dummy_ep *ep; | |
580 | struct dummy_request *req; | |
581 | ||
582 | if (!_ep) | |
583 | return NULL; | |
584 | ep = usb_ep_to_dummy_ep (_ep); | |
585 | ||
7039f422 | 586 | req = kzalloc(sizeof(*req), mem_flags); |
1da177e4 LT |
587 | if (!req) |
588 | return NULL; | |
1da177e4 LT |
589 | INIT_LIST_HEAD (&req->queue); |
590 | return &req->req; | |
591 | } | |
592 | ||
593 | static void | |
594 | dummy_free_request (struct usb_ep *_ep, struct usb_request *_req) | |
595 | { | |
596 | struct dummy_ep *ep; | |
597 | struct dummy_request *req; | |
598 | ||
599 | ep = usb_ep_to_dummy_ep (_ep); | |
600 | if (!ep || !_req || (!ep->desc && _ep->name != ep0name)) | |
601 | return; | |
602 | ||
603 | req = usb_request_to_dummy_request (_req); | |
604 | WARN_ON (!list_empty (&req->queue)); | |
605 | kfree (req); | |
606 | } | |
607 | ||
1da177e4 LT |
608 | static void |
609 | fifo_complete (struct usb_ep *ep, struct usb_request *req) | |
610 | { | |
611 | } | |
612 | ||
613 | static int | |
5db539e4 | 614 | dummy_queue (struct usb_ep *_ep, struct usb_request *_req, |
55016f10 | 615 | gfp_t mem_flags) |
1da177e4 LT |
616 | { |
617 | struct dummy_ep *ep; | |
618 | struct dummy_request *req; | |
619 | struct dummy *dum; | |
cdfcbd2c | 620 | struct dummy_hcd *dum_hcd; |
1da177e4 LT |
621 | unsigned long flags; |
622 | ||
623 | req = usb_request_to_dummy_request (_req); | |
624 | if (!_req || !list_empty (&req->queue) || !_req->complete) | |
625 | return -EINVAL; | |
626 | ||
627 | ep = usb_ep_to_dummy_ep (_ep); | |
628 | if (!_ep || (!ep->desc && _ep->name != ep0name)) | |
629 | return -EINVAL; | |
630 | ||
631 | dum = ep_to_dummy (ep); | |
719e52cb | 632 | dum_hcd = gadget_to_dummy_hcd(&dum->gadget); |
cdfcbd2c | 633 | if (!dum->driver || !is_enabled(dum_hcd)) |
1da177e4 LT |
634 | return -ESHUTDOWN; |
635 | ||
636 | #if 0 | |
d9b76251 | 637 | dev_dbg (udc_dev(dum), "ep %p queue req %p to %s, len %d buf %p\n", |
1da177e4 LT |
638 | ep, _req, _ep->name, _req->length, _req->buf); |
639 | #endif | |
640 | ||
641 | _req->status = -EINPROGRESS; | |
642 | _req->actual = 0; | |
643 | spin_lock_irqsave (&dum->lock, flags); | |
644 | ||
645 | /* implement an emulated single-request FIFO */ | |
646 | if (ep->desc && (ep->desc->bEndpointAddress & USB_DIR_IN) && | |
647 | list_empty (&dum->fifo_req.queue) && | |
648 | list_empty (&ep->queue) && | |
649 | _req->length <= FIFO_SIZE) { | |
650 | req = &dum->fifo_req; | |
651 | req->req = *_req; | |
652 | req->req.buf = dum->fifo_buf; | |
653 | memcpy (dum->fifo_buf, _req->buf, _req->length); | |
654 | req->req.context = dum; | |
655 | req->req.complete = fifo_complete; | |
656 | ||
c728df70 | 657 | list_add_tail(&req->queue, &ep->queue); |
1da177e4 LT |
658 | spin_unlock (&dum->lock); |
659 | _req->actual = _req->length; | |
660 | _req->status = 0; | |
661 | _req->complete (_ep, _req); | |
662 | spin_lock (&dum->lock); | |
c728df70 DB |
663 | } else |
664 | list_add_tail(&req->queue, &ep->queue); | |
1da177e4 LT |
665 | spin_unlock_irqrestore (&dum->lock, flags); |
666 | ||
667 | /* real hardware would likely enable transfers here, in case | |
668 | * it'd been left NAKing. | |
669 | */ | |
670 | return 0; | |
671 | } | |
672 | ||
673 | static int dummy_dequeue (struct usb_ep *_ep, struct usb_request *_req) | |
674 | { | |
675 | struct dummy_ep *ep; | |
676 | struct dummy *dum; | |
677 | int retval = -EINVAL; | |
678 | unsigned long flags; | |
679 | struct dummy_request *req = NULL; | |
680 | ||
681 | if (!_ep || !_req) | |
682 | return retval; | |
683 | ep = usb_ep_to_dummy_ep (_ep); | |
684 | dum = ep_to_dummy (ep); | |
685 | ||
686 | if (!dum->driver) | |
687 | return -ESHUTDOWN; | |
688 | ||
b4dbda1a AS |
689 | local_irq_save (flags); |
690 | spin_lock (&dum->lock); | |
1da177e4 LT |
691 | list_for_each_entry (req, &ep->queue, queue) { |
692 | if (&req->req == _req) { | |
693 | list_del_init (&req->queue); | |
694 | _req->status = -ECONNRESET; | |
695 | retval = 0; | |
696 | break; | |
697 | } | |
698 | } | |
b4dbda1a | 699 | spin_unlock (&dum->lock); |
1da177e4 LT |
700 | |
701 | if (retval == 0) { | |
d9b76251 | 702 | dev_dbg (udc_dev(dum), |
1da177e4 LT |
703 | "dequeued req %p from %s, len %d buf %p\n", |
704 | req, _ep->name, _req->length, _req->buf); | |
705 | _req->complete (_ep, _req); | |
706 | } | |
b4dbda1a | 707 | local_irq_restore (flags); |
1da177e4 LT |
708 | return retval; |
709 | } | |
710 | ||
711 | static int | |
851a526d | 712 | dummy_set_halt_and_wedge(struct usb_ep *_ep, int value, int wedged) |
1da177e4 LT |
713 | { |
714 | struct dummy_ep *ep; | |
715 | struct dummy *dum; | |
716 | ||
717 | if (!_ep) | |
718 | return -EINVAL; | |
719 | ep = usb_ep_to_dummy_ep (_ep); | |
720 | dum = ep_to_dummy (ep); | |
721 | if (!dum->driver) | |
722 | return -ESHUTDOWN; | |
723 | if (!value) | |
851a526d | 724 | ep->halted = ep->wedged = 0; |
1da177e4 LT |
725 | else if (ep->desc && (ep->desc->bEndpointAddress & USB_DIR_IN) && |
726 | !list_empty (&ep->queue)) | |
727 | return -EAGAIN; | |
851a526d | 728 | else { |
1da177e4 | 729 | ep->halted = 1; |
851a526d AS |
730 | if (wedged) |
731 | ep->wedged = 1; | |
732 | } | |
1da177e4 LT |
733 | /* FIXME clear emulated data toggle too */ |
734 | return 0; | |
735 | } | |
736 | ||
851a526d AS |
737 | static int |
738 | dummy_set_halt(struct usb_ep *_ep, int value) | |
739 | { | |
740 | return dummy_set_halt_and_wedge(_ep, value, 0); | |
741 | } | |
742 | ||
743 | static int dummy_set_wedge(struct usb_ep *_ep) | |
744 | { | |
745 | if (!_ep || _ep->name == ep0name) | |
746 | return -EINVAL; | |
747 | return dummy_set_halt_and_wedge(_ep, 1, 1); | |
748 | } | |
749 | ||
1da177e4 LT |
750 | static const struct usb_ep_ops dummy_ep_ops = { |
751 | .enable = dummy_enable, | |
752 | .disable = dummy_disable, | |
753 | ||
754 | .alloc_request = dummy_alloc_request, | |
755 | .free_request = dummy_free_request, | |
756 | ||
1da177e4 LT |
757 | .queue = dummy_queue, |
758 | .dequeue = dummy_dequeue, | |
759 | ||
760 | .set_halt = dummy_set_halt, | |
851a526d | 761 | .set_wedge = dummy_set_wedge, |
1da177e4 LT |
762 | }; |
763 | ||
764 | /*-------------------------------------------------------------------------*/ | |
765 | ||
766 | /* there are both host and device side versions of this call ... */ | |
767 | static int dummy_g_get_frame (struct usb_gadget *_gadget) | |
768 | { | |
769 | struct timeval tv; | |
770 | ||
771 | do_gettimeofday (&tv); | |
772 | return tv.tv_usec / 1000; | |
773 | } | |
774 | ||
775 | static int dummy_wakeup (struct usb_gadget *_gadget) | |
776 | { | |
cdfcbd2c | 777 | struct dummy_hcd *dum_hcd; |
1da177e4 | 778 | |
cdfcbd2c TB |
779 | dum_hcd = gadget_to_dummy_hcd(_gadget); |
780 | if (!(dum_hcd->dum->devstatus & ((1 << USB_DEVICE_B_HNP_ENABLE) | |
5742b0c9 | 781 | | (1 << USB_DEVICE_REMOTE_WAKEUP)))) |
1da177e4 | 782 | return -EINVAL; |
cdfcbd2c | 783 | if ((dum_hcd->port_status & USB_PORT_STAT_CONNECTION) == 0) |
391eca9d | 784 | return -ENOLINK; |
cdfcbd2c TB |
785 | if ((dum_hcd->port_status & USB_PORT_STAT_SUSPEND) == 0 && |
786 | dum_hcd->rh_state != DUMMY_RH_SUSPENDED) | |
391eca9d AS |
787 | return -EIO; |
788 | ||
789 | /* FIXME: What if the root hub is suspended but the port isn't? */ | |
1da177e4 LT |
790 | |
791 | /* hub notices our request, issues downstream resume, etc */ | |
cdfcbd2c TB |
792 | dum_hcd->resuming = 1; |
793 | dum_hcd->re_timeout = jiffies + msecs_to_jiffies(20); | |
794 | mod_timer(&dummy_hcd_to_hcd(dum_hcd)->rh_timer, dum_hcd->re_timeout); | |
1da177e4 LT |
795 | return 0; |
796 | } | |
797 | ||
798 | static int dummy_set_selfpowered (struct usb_gadget *_gadget, int value) | |
799 | { | |
800 | struct dummy *dum; | |
801 | ||
cdfcbd2c | 802 | dum = (gadget_to_dummy_hcd(_gadget))->dum; |
1da177e4 LT |
803 | if (value) |
804 | dum->devstatus |= (1 << USB_DEVICE_SELF_POWERED); | |
805 | else | |
806 | dum->devstatus &= ~(1 << USB_DEVICE_SELF_POWERED); | |
807 | return 0; | |
808 | } | |
809 | ||
f1c39fad AS |
810 | static int dummy_pullup (struct usb_gadget *_gadget, int value) |
811 | { | |
d8a14a85 | 812 | struct dummy_hcd *dum_hcd; |
f1c39fad AS |
813 | struct dummy *dum; |
814 | unsigned long flags; | |
815 | ||
d8a14a85 SAS |
816 | dum_hcd = gadget_to_dummy_hcd(_gadget); |
817 | dum = dum_hcd->dum; | |
818 | ||
f1c39fad AS |
819 | spin_lock_irqsave (&dum->lock, flags); |
820 | dum->pullup = (value != 0); | |
d8a14a85 | 821 | set_link_state(dum_hcd); |
f1c39fad | 822 | spin_unlock_irqrestore (&dum->lock, flags); |
d8a14a85 | 823 | usb_hcd_poll_rh_status(dummy_hcd_to_hcd(dum_hcd)); |
f1c39fad AS |
824 | return 0; |
825 | } | |
826 | ||
0f91349b SAS |
827 | static int dummy_udc_start(struct usb_gadget_driver *driver, |
828 | int (*bind)(struct usb_gadget *)); | |
829 | static int dummy_udc_stop(struct usb_gadget_driver *driver); | |
830 | ||
1da177e4 LT |
831 | static const struct usb_gadget_ops dummy_ops = { |
832 | .get_frame = dummy_g_get_frame, | |
833 | .wakeup = dummy_wakeup, | |
834 | .set_selfpowered = dummy_set_selfpowered, | |
f1c39fad | 835 | .pullup = dummy_pullup, |
0f91349b SAS |
836 | .start = dummy_udc_start, |
837 | .stop = dummy_udc_stop, | |
1da177e4 LT |
838 | }; |
839 | ||
840 | /*-------------------------------------------------------------------------*/ | |
841 | ||
842 | /* "function" sysfs attribute */ | |
843 | static ssize_t | |
10523b3b | 844 | show_function (struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
845 | { |
846 | struct dummy *dum = gadget_dev_to_dummy (dev); | |
847 | ||
848 | if (!dum->driver || !dum->driver->function) | |
849 | return 0; | |
850 | return scnprintf (buf, PAGE_SIZE, "%s\n", dum->driver->function); | |
851 | } | |
cc095b0b | 852 | static DEVICE_ATTR (function, S_IRUGO, show_function, NULL); |
1da177e4 LT |
853 | |
854 | /*-------------------------------------------------------------------------*/ | |
855 | ||
856 | /* | |
857 | * Driver registration/unregistration. | |
858 | * | |
859 | * This is basically hardware-specific; there's usually only one real USB | |
860 | * device (not host) controller since that's how USB devices are intended | |
861 | * to work. So most implementations of these api calls will rely on the | |
862 | * fact that only one driver will ever bind to the hardware. But curious | |
863 | * hardware can be built with discrete components, so the gadget API doesn't | |
864 | * require that assumption. | |
865 | * | |
866 | * For this emulator, it might be convenient to create a usb slave device | |
867 | * for each driver that registers: just add to a big root hub. | |
868 | */ | |
869 | ||
0f91349b | 870 | static int dummy_udc_start(struct usb_gadget_driver *driver, |
b0fca50f | 871 | int (*bind)(struct usb_gadget *)) |
1da177e4 | 872 | { |
cdfcbd2c | 873 | struct dummy *dum = &the_controller; |
1da177e4 LT |
874 | int retval, i; |
875 | ||
876 | if (!dum) | |
877 | return -EINVAL; | |
878 | if (dum->driver) | |
879 | return -EBUSY; | |
b0fca50f | 880 | if (!bind || !driver->setup || driver->speed == USB_SPEED_UNKNOWN) |
1da177e4 LT |
881 | return -EINVAL; |
882 | ||
883 | /* | |
884 | * SLAVE side init ... the layer above hardware, which | |
885 | * can't enumerate without help from the driver we're binding. | |
886 | */ | |
5742b0c9 | 887 | |
1da177e4 | 888 | dum->devstatus = 0; |
1da177e4 | 889 | |
1cd8fd28 TB |
890 | if (mod_data.is_super_speed) |
891 | dum->gadget.speed = driver->speed; | |
7eca4c5a TB |
892 | else if (mod_data.is_high_speed) |
893 | dum->gadget.speed = min_t(u8, USB_SPEED_HIGH, driver->speed); | |
1cd8fd28 | 894 | else |
7eca4c5a | 895 | dum->gadget.speed = USB_SPEED_FULL; |
1cd8fd28 | 896 | if (dum->gadget.speed < driver->speed) |
7eca4c5a TB |
897 | dev_dbg(udc_dev(dum), "This device can perform faster" |
898 | " if you connect it to a %s port...\n", | |
899 | (driver->speed == USB_SPEED_SUPER ? | |
900 | "SuperSpeed" : "HighSpeed")); | |
1cd8fd28 TB |
901 | |
902 | if (dum->gadget.speed == USB_SPEED_SUPER) { | |
903 | for (i = 0; i < DUMMY_ENDPOINTS; i++) | |
904 | dum->ep[i].ep.max_streams = 0x10; | |
905 | dum->ep[0].ep.maxpacket = 9; | |
0fb57599 SAS |
906 | } else { |
907 | for (i = 0; i < DUMMY_ENDPOINTS; i++) | |
908 | dum->ep[i].ep.max_streams = 0; | |
1cd8fd28 | 909 | dum->ep[0].ep.maxpacket = 64; |
0fb57599 | 910 | } |
99fd1408 | 911 | |
59331017 | 912 | driver->driver.bus = NULL; |
1da177e4 LT |
913 | dum->driver = driver; |
914 | dum->gadget.dev.driver = &driver->driver; | |
d9b76251 | 915 | dev_dbg (udc_dev(dum), "binding gadget driver '%s'\n", |
1da177e4 | 916 | driver->driver.name); |
b0fca50f | 917 | retval = bind(&dum->gadget); |
59331017 AS |
918 | if (retval) { |
919 | dum->driver = NULL; | |
920 | dum->gadget.dev.driver = NULL; | |
921 | return retval; | |
922 | } | |
1da177e4 | 923 | |
25427874 SAS |
924 | /* khubd will enumerate this in a while */ |
925 | dummy_pullup(&dum->gadget, 1); | |
1da177e4 LT |
926 | return 0; |
927 | } | |
1da177e4 | 928 | |
0f91349b | 929 | static int dummy_udc_stop(struct usb_gadget_driver *driver) |
1da177e4 | 930 | { |
cdfcbd2c | 931 | struct dummy *dum = &the_controller; |
1da177e4 LT |
932 | |
933 | if (!dum) | |
934 | return -ENODEV; | |
6bea476c | 935 | if (!driver || driver != dum->driver || !driver->unbind) |
1da177e4 LT |
936 | return -EINVAL; |
937 | ||
d9b76251 | 938 | dev_dbg (udc_dev(dum), "unregister gadget driver '%s'\n", |
1da177e4 LT |
939 | driver->driver.name); |
940 | ||
25427874 | 941 | dummy_pullup(&dum->gadget, 0); |
1da177e4 LT |
942 | |
943 | driver->unbind (&dum->gadget); | |
59331017 | 944 | dum->gadget.dev.driver = NULL; |
1da177e4 | 945 | dum->driver = NULL; |
25427874 SAS |
946 | |
947 | dummy_pullup(&dum->gadget, 0); | |
1da177e4 LT |
948 | return 0; |
949 | } | |
1da177e4 LT |
950 | |
951 | #undef is_enabled | |
952 | ||
d9b76251 AS |
953 | /* The gadget structure is stored inside the hcd structure and will be |
954 | * released along with it. */ | |
955 | static void | |
956 | dummy_gadget_release (struct device *dev) | |
957 | { | |
cdfcbd2c | 958 | return; |
d9b76251 AS |
959 | } |
960 | ||
0fb57599 SAS |
961 | static void init_dummy_udc_hw(struct dummy *dum) |
962 | { | |
963 | int i; | |
964 | ||
965 | INIT_LIST_HEAD(&dum->gadget.ep_list); | |
966 | for (i = 0; i < DUMMY_ENDPOINTS; i++) { | |
967 | struct dummy_ep *ep = &dum->ep[i]; | |
968 | ||
969 | if (!ep_name[i]) | |
970 | break; | |
971 | ep->ep.name = ep_name[i]; | |
972 | ep->ep.ops = &dummy_ep_ops; | |
973 | list_add_tail(&ep->ep.ep_list, &dum->gadget.ep_list); | |
974 | ep->halted = ep->wedged = ep->already_seen = | |
975 | ep->setup_stage = 0; | |
976 | ep->ep.maxpacket = ~0; | |
977 | ep->last_io = jiffies; | |
978 | ep->gadget = &dum->gadget; | |
979 | ep->desc = NULL; | |
980 | INIT_LIST_HEAD(&ep->queue); | |
981 | } | |
982 | ||
983 | dum->gadget.ep0 = &dum->ep[0].ep; | |
984 | list_del_init(&dum->ep[0].ep.ep_list); | |
985 | INIT_LIST_HEAD(&dum->fifo_req.queue); | |
f8744d40 SAS |
986 | |
987 | #ifdef CONFIG_USB_OTG | |
988 | dum->gadget.is_otg = 1; | |
989 | #endif | |
0fb57599 SAS |
990 | } |
991 | ||
8364d6b0 | 992 | static int dummy_udc_probe (struct platform_device *pdev) |
d9b76251 | 993 | { |
cdfcbd2c | 994 | struct dummy *dum = &the_controller; |
d9b76251 AS |
995 | int rc; |
996 | ||
997 | dum->gadget.name = gadget_name; | |
998 | dum->gadget.ops = &dummy_ops; | |
999 | dum->gadget.is_dualspeed = 1; | |
1000 | ||
0031a06e | 1001 | dev_set_name(&dum->gadget.dev, "gadget"); |
8364d6b0 | 1002 | dum->gadget.dev.parent = &pdev->dev; |
d9b76251 AS |
1003 | dum->gadget.dev.release = dummy_gadget_release; |
1004 | rc = device_register (&dum->gadget.dev); | |
75d87cdf RR |
1005 | if (rc < 0) { |
1006 | put_device(&dum->gadget.dev); | |
d9b76251 | 1007 | return rc; |
75d87cdf | 1008 | } |
d9b76251 | 1009 | |
0fb57599 SAS |
1010 | init_dummy_udc_hw(dum); |
1011 | ||
0f91349b SAS |
1012 | rc = usb_add_gadget_udc(&pdev->dev, &dum->gadget); |
1013 | if (rc < 0) | |
1014 | goto err_udc; | |
1015 | ||
efd54a36 AS |
1016 | rc = device_create_file (&dum->gadget.dev, &dev_attr_function); |
1017 | if (rc < 0) | |
0f91349b SAS |
1018 | goto err_dev; |
1019 | platform_set_drvdata(pdev, dum); | |
1020 | return rc; | |
1021 | ||
1022 | err_dev: | |
1023 | usb_del_gadget_udc(&dum->gadget); | |
1024 | err_udc: | |
1025 | device_unregister(&dum->gadget.dev); | |
d9b76251 AS |
1026 | return rc; |
1027 | } | |
1028 | ||
8364d6b0 | 1029 | static int dummy_udc_remove (struct platform_device *pdev) |
d9b76251 | 1030 | { |
8364d6b0 | 1031 | struct dummy *dum = platform_get_drvdata (pdev); |
d9b76251 | 1032 | |
0f91349b | 1033 | usb_del_gadget_udc(&dum->gadget); |
8364d6b0 | 1034 | platform_set_drvdata (pdev, NULL); |
d9b76251 AS |
1035 | device_remove_file (&dum->gadget.dev, &dev_attr_function); |
1036 | device_unregister (&dum->gadget.dev); | |
1037 | return 0; | |
1038 | } | |
1039 | ||
fc0b721f SAS |
1040 | static void dummy_udc_pm(struct dummy *dum, struct dummy_hcd *dum_hcd, |
1041 | int suspend) | |
391eca9d | 1042 | { |
fc0b721f SAS |
1043 | spin_lock_irq(&dum->lock); |
1044 | dum->udc_suspended = suspend; | |
d8a14a85 | 1045 | set_link_state(dum_hcd); |
fc0b721f SAS |
1046 | spin_unlock_irq(&dum->lock); |
1047 | } | |
1048 | ||
1049 | static int dummy_udc_suspend(struct platform_device *pdev, pm_message_t state) | |
1050 | { | |
1051 | struct dummy *dum = platform_get_drvdata(pdev); | |
1052 | struct dummy_hcd *dum_hcd = gadget_to_dummy_hcd(&dum->gadget); | |
391eca9d | 1053 | |
fc0b721f SAS |
1054 | dev_dbg(&pdev->dev, "%s\n", __func__); |
1055 | dummy_udc_pm(dum, dum_hcd, 1); | |
d8a14a85 | 1056 | usb_hcd_poll_rh_status(dummy_hcd_to_hcd(dum_hcd)); |
391eca9d AS |
1057 | return 0; |
1058 | } | |
1059 | ||
fc0b721f | 1060 | static int dummy_udc_resume(struct platform_device *pdev) |
391eca9d | 1061 | { |
fc0b721f SAS |
1062 | struct dummy *dum = platform_get_drvdata(pdev); |
1063 | struct dummy_hcd *dum_hcd = gadget_to_dummy_hcd(&dum->gadget); | |
391eca9d | 1064 | |
fc0b721f SAS |
1065 | dev_dbg(&pdev->dev, "%s\n", __func__); |
1066 | dummy_udc_pm(dum, dum_hcd, 0); | |
d8a14a85 | 1067 | usb_hcd_poll_rh_status(dummy_hcd_to_hcd(dum_hcd)); |
391eca9d AS |
1068 | return 0; |
1069 | } | |
1070 | ||
3ae5eaec | 1071 | static struct platform_driver dummy_udc_driver = { |
d9b76251 AS |
1072 | .probe = dummy_udc_probe, |
1073 | .remove = dummy_udc_remove, | |
391eca9d AS |
1074 | .suspend = dummy_udc_suspend, |
1075 | .resume = dummy_udc_resume, | |
3ae5eaec RK |
1076 | .driver = { |
1077 | .name = (char *) gadget_name, | |
1078 | .owner = THIS_MODULE, | |
1079 | }, | |
d9b76251 AS |
1080 | }; |
1081 | ||
1da177e4 LT |
1082 | /*-------------------------------------------------------------------------*/ |
1083 | ||
1084 | /* MASTER/HOST SIDE DRIVER | |
1085 | * | |
1086 | * this uses the hcd framework to hook up to host side drivers. | |
1087 | * its root hub will only have one device, otherwise it acts like | |
1088 | * a normal host controller. | |
1089 | * | |
1090 | * when urbs are queued, they're just stuck on a list that we | |
1091 | * scan in a timer callback. that callback connects writes from | |
1092 | * the host with reads from the device, and so on, based on the | |
1093 | * usb 2.0 rules. | |
1094 | */ | |
1095 | ||
1096 | static int dummy_urb_enqueue ( | |
1097 | struct usb_hcd *hcd, | |
1da177e4 | 1098 | struct urb *urb, |
55016f10 | 1099 | gfp_t mem_flags |
1da177e4 | 1100 | ) { |
cdfcbd2c | 1101 | struct dummy_hcd *dum_hcd; |
1da177e4 LT |
1102 | struct urbp *urbp; |
1103 | unsigned long flags; | |
e9df41c5 | 1104 | int rc; |
1da177e4 LT |
1105 | |
1106 | if (!urb->transfer_buffer && urb->transfer_buffer_length) | |
1107 | return -EINVAL; | |
1108 | ||
1109 | urbp = kmalloc (sizeof *urbp, mem_flags); | |
1110 | if (!urbp) | |
1111 | return -ENOMEM; | |
1112 | urbp->urb = urb; | |
1113 | ||
cdfcbd2c TB |
1114 | dum_hcd = hcd_to_dummy_hcd(hcd); |
1115 | spin_lock_irqsave(&dum_hcd->dum->lock, flags); | |
e9df41c5 AS |
1116 | rc = usb_hcd_link_urb_to_ep(hcd, urb); |
1117 | if (rc) { | |
1118 | kfree(urbp); | |
1119 | goto done; | |
1120 | } | |
1da177e4 | 1121 | |
cdfcbd2c TB |
1122 | if (!dum_hcd->udev) { |
1123 | dum_hcd->udev = urb->dev; | |
1124 | usb_get_dev(dum_hcd->udev); | |
1125 | } else if (unlikely(dum_hcd->udev != urb->dev)) | |
1126 | dev_err(dummy_dev(dum_hcd), "usb_device address has changed!\n"); | |
1da177e4 | 1127 | |
cdfcbd2c | 1128 | list_add_tail(&urbp->urbp_list, &dum_hcd->urbp_list); |
1da177e4 LT |
1129 | urb->hcpriv = urbp; |
1130 | if (usb_pipetype (urb->pipe) == PIPE_CONTROL) | |
1131 | urb->error_count = 1; /* mark as a new urb */ | |
1132 | ||
1133 | /* kick the scheduler, it'll do the rest */ | |
cdfcbd2c TB |
1134 | if (!timer_pending(&dum_hcd->timer)) |
1135 | mod_timer(&dum_hcd->timer, jiffies + 1); | |
1da177e4 | 1136 | |
e9df41c5 | 1137 | done: |
cdfcbd2c | 1138 | spin_unlock_irqrestore(&dum_hcd->dum->lock, flags); |
e9df41c5 | 1139 | return rc; |
1da177e4 LT |
1140 | } |
1141 | ||
e9df41c5 | 1142 | static int dummy_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status) |
1da177e4 | 1143 | { |
cdfcbd2c | 1144 | struct dummy_hcd *dum_hcd; |
391eca9d | 1145 | unsigned long flags; |
e9df41c5 | 1146 | int rc; |
391eca9d AS |
1147 | |
1148 | /* giveback happens automatically in timer callback, | |
1149 | * so make sure the callback happens */ | |
cdfcbd2c TB |
1150 | dum_hcd = hcd_to_dummy_hcd(hcd); |
1151 | spin_lock_irqsave(&dum_hcd->dum->lock, flags); | |
e9df41c5 AS |
1152 | |
1153 | rc = usb_hcd_check_unlink_urb(hcd, urb, status); | |
cdfcbd2c TB |
1154 | if (!rc && dum_hcd->rh_state != DUMMY_RH_RUNNING && |
1155 | !list_empty(&dum_hcd->urbp_list)) | |
1156 | mod_timer(&dum_hcd->timer, jiffies); | |
e9df41c5 | 1157 | |
cdfcbd2c | 1158 | spin_unlock_irqrestore(&dum_hcd->dum->lock, flags); |
e9df41c5 | 1159 | return rc; |
1da177e4 LT |
1160 | } |
1161 | ||
1da177e4 LT |
1162 | /* transfer up to a frame's worth; caller must own lock */ |
1163 | static int | |
4d2f110c AS |
1164 | transfer(struct dummy *dum, struct urb *urb, struct dummy_ep *ep, int limit, |
1165 | int *status) | |
1da177e4 LT |
1166 | { |
1167 | struct dummy_request *req; | |
1168 | ||
1169 | top: | |
1170 | /* if there's no request queued, the device is NAKing; return */ | |
1171 | list_for_each_entry (req, &ep->queue, queue) { | |
1172 | unsigned host_len, dev_len, len; | |
1173 | int is_short, to_host; | |
1174 | int rescan = 0; | |
1175 | ||
1176 | /* 1..N packets of ep->ep.maxpacket each ... the last one | |
1177 | * may be short (including zero length). | |
1178 | * | |
1179 | * writer can send a zlp explicitly (length 0) or implicitly | |
1180 | * (length mod maxpacket zero, and 'zero' flag); they always | |
1181 | * terminate reads. | |
1182 | */ | |
1183 | host_len = urb->transfer_buffer_length - urb->actual_length; | |
1184 | dev_len = req->req.length - req->req.actual; | |
1185 | len = min (host_len, dev_len); | |
1186 | ||
1187 | /* FIXME update emulated data toggle too */ | |
1188 | ||
1189 | to_host = usb_pipein (urb->pipe); | |
1190 | if (unlikely (len == 0)) | |
1191 | is_short = 1; | |
1192 | else { | |
1193 | char *ubuf, *rbuf; | |
1194 | ||
1195 | /* not enough bandwidth left? */ | |
1196 | if (limit < ep->ep.maxpacket && limit < len) | |
1197 | break; | |
1198 | len = min (len, (unsigned) limit); | |
1199 | if (len == 0) | |
1200 | break; | |
1201 | ||
1202 | /* use an extra pass for the final short packet */ | |
1203 | if (len > ep->ep.maxpacket) { | |
1204 | rescan = 1; | |
1205 | len -= (len % ep->ep.maxpacket); | |
1206 | } | |
1207 | is_short = (len % ep->ep.maxpacket) != 0; | |
1208 | ||
1209 | /* else transfer packet(s) */ | |
1210 | ubuf = urb->transfer_buffer + urb->actual_length; | |
1211 | rbuf = req->req.buf + req->req.actual; | |
1212 | if (to_host) | |
1213 | memcpy (ubuf, rbuf, len); | |
1214 | else | |
1215 | memcpy (rbuf, ubuf, len); | |
1216 | ep->last_io = jiffies; | |
1217 | ||
1218 | limit -= len; | |
1219 | urb->actual_length += len; | |
1220 | req->req.actual += len; | |
1221 | } | |
1222 | ||
1223 | /* short packets terminate, maybe with overflow/underflow. | |
1224 | * it's only really an error to write too much. | |
1225 | * | |
1226 | * partially filling a buffer optionally blocks queue advances | |
1227 | * (so completion handlers can clean up the queue) but we don't | |
b0d9efba | 1228 | * need to emulate such data-in-flight. |
1da177e4 LT |
1229 | */ |
1230 | if (is_short) { | |
1231 | if (host_len == dev_len) { | |
1232 | req->req.status = 0; | |
4d2f110c | 1233 | *status = 0; |
1da177e4 LT |
1234 | } else if (to_host) { |
1235 | req->req.status = 0; | |
1236 | if (dev_len > host_len) | |
4d2f110c | 1237 | *status = -EOVERFLOW; |
1da177e4 | 1238 | else |
4d2f110c | 1239 | *status = 0; |
1da177e4 | 1240 | } else if (!to_host) { |
4d2f110c | 1241 | *status = 0; |
1da177e4 LT |
1242 | if (host_len > dev_len) |
1243 | req->req.status = -EOVERFLOW; | |
1244 | else | |
1245 | req->req.status = 0; | |
1246 | } | |
1247 | ||
1248 | /* many requests terminate without a short packet */ | |
1249 | } else { | |
1250 | if (req->req.length == req->req.actual | |
1251 | && !req->req.zero) | |
1252 | req->req.status = 0; | |
1253 | if (urb->transfer_buffer_length == urb->actual_length | |
1254 | && !(urb->transfer_flags | |
4d2f110c AS |
1255 | & URB_ZERO_PACKET)) |
1256 | *status = 0; | |
1da177e4 LT |
1257 | } |
1258 | ||
1259 | /* device side completion --> continuable */ | |
1260 | if (req->req.status != -EINPROGRESS) { | |
1261 | list_del_init (&req->queue); | |
1262 | ||
1263 | spin_unlock (&dum->lock); | |
1264 | req->req.complete (&ep->ep, &req->req); | |
1265 | spin_lock (&dum->lock); | |
1266 | ||
1267 | /* requests might have been unlinked... */ | |
1268 | rescan = 1; | |
1269 | } | |
1270 | ||
1271 | /* host side completion --> terminate */ | |
4d2f110c | 1272 | if (*status != -EINPROGRESS) |
1da177e4 LT |
1273 | break; |
1274 | ||
1275 | /* rescan to continue with any other queued i/o */ | |
1276 | if (rescan) | |
1277 | goto top; | |
1278 | } | |
1279 | return limit; | |
1280 | } | |
1281 | ||
1282 | static int periodic_bytes (struct dummy *dum, struct dummy_ep *ep) | |
1283 | { | |
1284 | int limit = ep->ep.maxpacket; | |
1285 | ||
1286 | if (dum->gadget.speed == USB_SPEED_HIGH) { | |
1287 | int tmp; | |
1288 | ||
1289 | /* high bandwidth mode */ | |
1290 | tmp = le16_to_cpu(ep->desc->wMaxPacketSize); | |
1da177e4 LT |
1291 | tmp = (tmp >> 11) & 0x03; |
1292 | tmp *= 8 /* applies to entire frame */; | |
1293 | limit += limit * tmp; | |
1294 | } | |
1cd8fd28 TB |
1295 | if (dum->gadget.speed == USB_SPEED_SUPER) { |
1296 | switch (ep->desc->bmAttributes & 0x03) { | |
1297 | case USB_ENDPOINT_XFER_ISOC: | |
1298 | /* Sec. 4.4.8.2 USB3.0 Spec */ | |
1299 | limit = 3 * 16 * 1024 * 8; | |
1300 | break; | |
1301 | case USB_ENDPOINT_XFER_INT: | |
1302 | /* Sec. 4.4.7.2 USB3.0 Spec */ | |
1303 | limit = 3 * 1024 * 8; | |
1304 | break; | |
1305 | case USB_ENDPOINT_XFER_BULK: | |
1306 | default: | |
1307 | break; | |
1308 | } | |
1309 | } | |
1da177e4 LT |
1310 | return limit; |
1311 | } | |
1312 | ||
cdfcbd2c | 1313 | #define is_active(dum_hcd) ((dum_hcd->port_status & \ |
1da177e4 LT |
1314 | (USB_PORT_STAT_CONNECTION | USB_PORT_STAT_ENABLE | \ |
1315 | USB_PORT_STAT_SUSPEND)) \ | |
1316 | == (USB_PORT_STAT_CONNECTION | USB_PORT_STAT_ENABLE)) | |
1317 | ||
1318 | static struct dummy_ep *find_endpoint (struct dummy *dum, u8 address) | |
1319 | { | |
1320 | int i; | |
1321 | ||
1cd8fd28 TB |
1322 | if (!is_active((dum->gadget.speed == USB_SPEED_SUPER ? |
1323 | dum->ss_hcd : dum->hs_hcd))) | |
1da177e4 LT |
1324 | return NULL; |
1325 | if ((address & ~USB_DIR_IN) == 0) | |
1326 | return &dum->ep [0]; | |
1327 | for (i = 1; i < DUMMY_ENDPOINTS; i++) { | |
1328 | struct dummy_ep *ep = &dum->ep [i]; | |
1329 | ||
1330 | if (!ep->desc) | |
1331 | continue; | |
1332 | if (ep->desc->bEndpointAddress == address) | |
1333 | return ep; | |
1334 | } | |
1335 | return NULL; | |
1336 | } | |
1337 | ||
1338 | #undef is_active | |
1339 | ||
1340 | #define Dev_Request (USB_TYPE_STANDARD | USB_RECIP_DEVICE) | |
1341 | #define Dev_InRequest (Dev_Request | USB_DIR_IN) | |
1342 | #define Intf_Request (USB_TYPE_STANDARD | USB_RECIP_INTERFACE) | |
1343 | #define Intf_InRequest (Intf_Request | USB_DIR_IN) | |
1344 | #define Ep_Request (USB_TYPE_STANDARD | USB_RECIP_ENDPOINT) | |
1345 | #define Ep_InRequest (Ep_Request | USB_DIR_IN) | |
1346 | ||
8be8a9d3 TB |
1347 | |
1348 | /** | |
1349 | * handle_control_request() - handles all control transfers | |
1350 | * @dum: pointer to dummy (the_controller) | |
1351 | * @urb: the urb request to handle | |
1352 | * @setup: pointer to the setup data for a USB device control | |
1353 | * request | |
1354 | * @status: pointer to request handling status | |
1355 | * | |
1356 | * Return 0 - if the request was handled | |
1357 | * 1 - if the request wasn't handles | |
1358 | * error code on error | |
1359 | */ | |
cdfcbd2c | 1360 | static int handle_control_request(struct dummy_hcd *dum_hcd, struct urb *urb, |
8be8a9d3 TB |
1361 | struct usb_ctrlrequest *setup, |
1362 | int *status) | |
1363 | { | |
1364 | struct dummy_ep *ep2; | |
cdfcbd2c | 1365 | struct dummy *dum = dum_hcd->dum; |
8be8a9d3 TB |
1366 | int ret_val = 1; |
1367 | unsigned w_index; | |
1368 | unsigned w_value; | |
1369 | ||
1370 | w_index = le16_to_cpu(setup->wIndex); | |
1371 | w_value = le16_to_cpu(setup->wValue); | |
1372 | switch (setup->bRequest) { | |
1373 | case USB_REQ_SET_ADDRESS: | |
1374 | if (setup->bRequestType != Dev_Request) | |
1375 | break; | |
1376 | dum->address = w_value; | |
1377 | *status = 0; | |
1378 | dev_dbg(udc_dev(dum), "set_address = %d\n", | |
1379 | w_value); | |
1380 | ret_val = 0; | |
1381 | break; | |
1382 | case USB_REQ_SET_FEATURE: | |
1383 | if (setup->bRequestType == Dev_Request) { | |
1384 | ret_val = 0; | |
1385 | switch (w_value) { | |
1386 | case USB_DEVICE_REMOTE_WAKEUP: | |
1387 | break; | |
1388 | case USB_DEVICE_B_HNP_ENABLE: | |
1389 | dum->gadget.b_hnp_enable = 1; | |
1390 | break; | |
1391 | case USB_DEVICE_A_HNP_SUPPORT: | |
1392 | dum->gadget.a_hnp_support = 1; | |
1393 | break; | |
1394 | case USB_DEVICE_A_ALT_HNP_SUPPORT: | |
1395 | dum->gadget.a_alt_hnp_support = 1; | |
1396 | break; | |
1cd8fd28 TB |
1397 | case USB_DEVICE_U1_ENABLE: |
1398 | if (dummy_hcd_to_hcd(dum_hcd)->speed == | |
1399 | HCD_USB3) | |
1400 | w_value = USB_DEV_STAT_U1_ENABLED; | |
1401 | else | |
1402 | ret_val = -EOPNOTSUPP; | |
1403 | break; | |
1404 | case USB_DEVICE_U2_ENABLE: | |
1405 | if (dummy_hcd_to_hcd(dum_hcd)->speed == | |
1406 | HCD_USB3) | |
1407 | w_value = USB_DEV_STAT_U2_ENABLED; | |
1408 | else | |
1409 | ret_val = -EOPNOTSUPP; | |
1410 | break; | |
1411 | case USB_DEVICE_LTM_ENABLE: | |
1412 | if (dummy_hcd_to_hcd(dum_hcd)->speed == | |
1413 | HCD_USB3) | |
1414 | w_value = USB_DEV_STAT_LTM_ENABLED; | |
1415 | else | |
1416 | ret_val = -EOPNOTSUPP; | |
1417 | break; | |
8be8a9d3 TB |
1418 | default: |
1419 | ret_val = -EOPNOTSUPP; | |
1420 | } | |
1421 | if (ret_val == 0) { | |
1422 | dum->devstatus |= (1 << w_value); | |
1423 | *status = 0; | |
1424 | } | |
1425 | } else if (setup->bRequestType == Ep_Request) { | |
1426 | /* endpoint halt */ | |
1427 | ep2 = find_endpoint(dum, w_index); | |
1428 | if (!ep2 || ep2->ep.name == ep0name) { | |
1429 | ret_val = -EOPNOTSUPP; | |
1430 | break; | |
1431 | } | |
1432 | ep2->halted = 1; | |
1433 | ret_val = 0; | |
1434 | *status = 0; | |
1435 | } | |
1436 | break; | |
1437 | case USB_REQ_CLEAR_FEATURE: | |
1438 | if (setup->bRequestType == Dev_Request) { | |
1439 | ret_val = 0; | |
1440 | switch (w_value) { | |
1441 | case USB_DEVICE_REMOTE_WAKEUP: | |
1442 | w_value = USB_DEVICE_REMOTE_WAKEUP; | |
1443 | break; | |
1cd8fd28 TB |
1444 | case USB_DEVICE_U1_ENABLE: |
1445 | if (dummy_hcd_to_hcd(dum_hcd)->speed == | |
1446 | HCD_USB3) | |
1447 | w_value = USB_DEV_STAT_U1_ENABLED; | |
1448 | else | |
1449 | ret_val = -EOPNOTSUPP; | |
1450 | break; | |
1451 | case USB_DEVICE_U2_ENABLE: | |
1452 | if (dummy_hcd_to_hcd(dum_hcd)->speed == | |
1453 | HCD_USB3) | |
1454 | w_value = USB_DEV_STAT_U2_ENABLED; | |
1455 | else | |
1456 | ret_val = -EOPNOTSUPP; | |
1457 | break; | |
1458 | case USB_DEVICE_LTM_ENABLE: | |
1459 | if (dummy_hcd_to_hcd(dum_hcd)->speed == | |
1460 | HCD_USB3) | |
1461 | w_value = USB_DEV_STAT_LTM_ENABLED; | |
1462 | else | |
1463 | ret_val = -EOPNOTSUPP; | |
1464 | break; | |
8be8a9d3 TB |
1465 | default: |
1466 | ret_val = -EOPNOTSUPP; | |
1467 | break; | |
1468 | } | |
1469 | if (ret_val == 0) { | |
1470 | dum->devstatus &= ~(1 << w_value); | |
1471 | *status = 0; | |
1472 | } | |
1473 | } else if (setup->bRequestType == Ep_Request) { | |
1474 | /* endpoint halt */ | |
1475 | ep2 = find_endpoint(dum, w_index); | |
1476 | if (!ep2) { | |
1477 | ret_val = -EOPNOTSUPP; | |
1478 | break; | |
1479 | } | |
1480 | if (!ep2->wedged) | |
1481 | ep2->halted = 0; | |
1482 | ret_val = 0; | |
1483 | *status = 0; | |
1484 | } | |
1485 | break; | |
1486 | case USB_REQ_GET_STATUS: | |
1487 | if (setup->bRequestType == Dev_InRequest | |
1488 | || setup->bRequestType == Intf_InRequest | |
1489 | || setup->bRequestType == Ep_InRequest) { | |
1490 | char *buf; | |
1491 | /* | |
1492 | * device: remote wakeup, selfpowered | |
1493 | * interface: nothing | |
1494 | * endpoint: halt | |
1495 | */ | |
1496 | buf = (char *)urb->transfer_buffer; | |
1497 | if (urb->transfer_buffer_length > 0) { | |
1498 | if (setup->bRequestType == Ep_InRequest) { | |
1499 | ep2 = find_endpoint(dum, w_index); | |
1500 | if (!ep2) { | |
1501 | ret_val = -EOPNOTSUPP; | |
1502 | break; | |
1503 | } | |
1504 | buf[0] = ep2->halted; | |
1505 | } else if (setup->bRequestType == | |
1506 | Dev_InRequest) { | |
1507 | buf[0] = (u8)dum->devstatus; | |
1508 | } else | |
1509 | buf[0] = 0; | |
1510 | } | |
1511 | if (urb->transfer_buffer_length > 1) | |
1512 | buf[1] = 0; | |
1513 | urb->actual_length = min_t(u32, 2, | |
1514 | urb->transfer_buffer_length); | |
1515 | ret_val = 0; | |
1516 | *status = 0; | |
1517 | } | |
1518 | break; | |
1519 | } | |
1520 | return ret_val; | |
1521 | } | |
1522 | ||
1da177e4 LT |
1523 | /* drive both sides of the transfers; looks like irq handlers to |
1524 | * both drivers except the callbacks aren't in_irq(). | |
1525 | */ | |
cdfcbd2c | 1526 | static void dummy_timer(unsigned long _dum_hcd) |
1da177e4 | 1527 | { |
cdfcbd2c TB |
1528 | struct dummy_hcd *dum_hcd = (struct dummy_hcd *) _dum_hcd; |
1529 | struct dummy *dum = dum_hcd->dum; | |
1da177e4 LT |
1530 | struct urbp *urbp, *tmp; |
1531 | unsigned long flags; | |
1532 | int limit, total; | |
1533 | int i; | |
1534 | ||
1535 | /* simplistic model for one frame's bandwidth */ | |
1536 | switch (dum->gadget.speed) { | |
1537 | case USB_SPEED_LOW: | |
1538 | total = 8/*bytes*/ * 12/*packets*/; | |
1539 | break; | |
1540 | case USB_SPEED_FULL: | |
1541 | total = 64/*bytes*/ * 19/*packets*/; | |
1542 | break; | |
1543 | case USB_SPEED_HIGH: | |
1544 | total = 512/*bytes*/ * 13/*packets*/ * 8/*uframes*/; | |
1545 | break; | |
1cd8fd28 TB |
1546 | case USB_SPEED_SUPER: |
1547 | /* Bus speed is 500000 bytes/ms, so use a little less */ | |
1548 | total = 490000; | |
1549 | break; | |
1da177e4 | 1550 | default: |
cdfcbd2c | 1551 | dev_err(dummy_dev(dum_hcd), "bogus device speed\n"); |
1da177e4 LT |
1552 | return; |
1553 | } | |
1554 | ||
1555 | /* FIXME if HZ != 1000 this will probably misbehave ... */ | |
1556 | ||
1557 | /* look at each urb queued by the host side driver */ | |
1558 | spin_lock_irqsave (&dum->lock, flags); | |
1559 | ||
cdfcbd2c TB |
1560 | if (!dum_hcd->udev) { |
1561 | dev_err(dummy_dev(dum_hcd), | |
1da177e4 LT |
1562 | "timer fired with no URBs pending?\n"); |
1563 | spin_unlock_irqrestore (&dum->lock, flags); | |
1564 | return; | |
1565 | } | |
1566 | ||
1567 | for (i = 0; i < DUMMY_ENDPOINTS; i++) { | |
1568 | if (!ep_name [i]) | |
1569 | break; | |
1570 | dum->ep [i].already_seen = 0; | |
1571 | } | |
1572 | ||
1573 | restart: | |
cdfcbd2c | 1574 | list_for_each_entry_safe(urbp, tmp, &dum_hcd->urbp_list, urbp_list) { |
1da177e4 LT |
1575 | struct urb *urb; |
1576 | struct dummy_request *req; | |
1577 | u8 address; | |
1578 | struct dummy_ep *ep = NULL; | |
1579 | int type; | |
4d2f110c | 1580 | int status = -EINPROGRESS; |
1da177e4 LT |
1581 | |
1582 | urb = urbp->urb; | |
eb231054 | 1583 | if (urb->unlinked) |
1da177e4 | 1584 | goto return_urb; |
cdfcbd2c | 1585 | else if (dum_hcd->rh_state != DUMMY_RH_RUNNING) |
391eca9d | 1586 | continue; |
1da177e4 LT |
1587 | type = usb_pipetype (urb->pipe); |
1588 | ||
1589 | /* used up this frame's non-periodic bandwidth? | |
1590 | * FIXME there's infinite bandwidth for control and | |
1591 | * periodic transfers ... unrealistic. | |
1592 | */ | |
1593 | if (total <= 0 && type == PIPE_BULK) | |
1594 | continue; | |
1595 | ||
1596 | /* find the gadget's ep for this request (if configured) */ | |
1597 | address = usb_pipeendpoint (urb->pipe); | |
1598 | if (usb_pipein (urb->pipe)) | |
1599 | address |= USB_DIR_IN; | |
1600 | ep = find_endpoint(dum, address); | |
1601 | if (!ep) { | |
1602 | /* set_configuration() disagreement */ | |
cdfcbd2c | 1603 | dev_dbg(dummy_dev(dum_hcd), |
1da177e4 LT |
1604 | "no ep configured for urb %p\n", |
1605 | urb); | |
4d2f110c | 1606 | status = -EPROTO; |
1da177e4 LT |
1607 | goto return_urb; |
1608 | } | |
1609 | ||
1610 | if (ep->already_seen) | |
1611 | continue; | |
1612 | ep->already_seen = 1; | |
1613 | if (ep == &dum->ep [0] && urb->error_count) { | |
1614 | ep->setup_stage = 1; /* a new urb */ | |
1615 | urb->error_count = 0; | |
1616 | } | |
1617 | if (ep->halted && !ep->setup_stage) { | |
1618 | /* NOTE: must not be iso! */ | |
cdfcbd2c | 1619 | dev_dbg(dummy_dev(dum_hcd), "ep %s halted, urb %p\n", |
1da177e4 | 1620 | ep->ep.name, urb); |
4d2f110c | 1621 | status = -EPIPE; |
1da177e4 LT |
1622 | goto return_urb; |
1623 | } | |
1624 | /* FIXME make sure both ends agree on maxpacket */ | |
1625 | ||
1626 | /* handle control requests */ | |
1627 | if (ep == &dum->ep [0] && ep->setup_stage) { | |
1628 | struct usb_ctrlrequest setup; | |
1629 | int value = 1; | |
1da177e4 LT |
1630 | |
1631 | setup = *(struct usb_ctrlrequest*) urb->setup_packet; | |
1da177e4 LT |
1632 | /* paranoia, in case of stale queued data */ |
1633 | list_for_each_entry (req, &ep->queue, queue) { | |
1634 | list_del_init (&req->queue); | |
1635 | req->req.status = -EOVERFLOW; | |
d9b76251 | 1636 | dev_dbg (udc_dev(dum), "stale req = %p\n", |
1da177e4 LT |
1637 | req); |
1638 | ||
1639 | spin_unlock (&dum->lock); | |
1640 | req->req.complete (&ep->ep, &req->req); | |
1641 | spin_lock (&dum->lock); | |
1642 | ep->already_seen = 0; | |
1643 | goto restart; | |
1644 | } | |
1645 | ||
1646 | /* gadget driver never sees set_address or operations | |
1647 | * on standard feature flags. some hardware doesn't | |
1648 | * even expose them. | |
1649 | */ | |
1650 | ep->last_io = jiffies; | |
1651 | ep->setup_stage = 0; | |
1652 | ep->halted = 0; | |
1da177e4 | 1653 | |
cdfcbd2c | 1654 | value = handle_control_request(dum_hcd, urb, &setup, |
8be8a9d3 | 1655 | &status); |
1da177e4 LT |
1656 | |
1657 | /* gadget driver handles all other requests. block | |
1658 | * until setup() returns; no reentrancy issues etc. | |
1659 | */ | |
1660 | if (value > 0) { | |
1661 | spin_unlock (&dum->lock); | |
1662 | value = dum->driver->setup (&dum->gadget, | |
1663 | &setup); | |
1664 | spin_lock (&dum->lock); | |
1665 | ||
1666 | if (value >= 0) { | |
1667 | /* no delays (max 64KB data stage) */ | |
1668 | limit = 64*1024; | |
1669 | goto treat_control_like_bulk; | |
1670 | } | |
1671 | /* error, see below */ | |
1672 | } | |
1673 | ||
1674 | if (value < 0) { | |
1675 | if (value != -EOPNOTSUPP) | |
d9b76251 | 1676 | dev_dbg (udc_dev(dum), |
1da177e4 LT |
1677 | "setup --> %d\n", |
1678 | value); | |
4d2f110c | 1679 | status = -EPIPE; |
1da177e4 LT |
1680 | urb->actual_length = 0; |
1681 | } | |
1682 | ||
1683 | goto return_urb; | |
1684 | } | |
1685 | ||
1686 | /* non-control requests */ | |
1687 | limit = total; | |
1688 | switch (usb_pipetype (urb->pipe)) { | |
1689 | case PIPE_ISOCHRONOUS: | |
1690 | /* FIXME is it urb->interval since the last xfer? | |
1691 | * use urb->iso_frame_desc[i]. | |
1692 | * complete whether or not ep has requests queued. | |
1693 | * report random errors, to debug drivers. | |
1694 | */ | |
1695 | limit = max (limit, periodic_bytes (dum, ep)); | |
4d2f110c | 1696 | status = -ENOSYS; |
1da177e4 LT |
1697 | break; |
1698 | ||
1699 | case PIPE_INTERRUPT: | |
1700 | /* FIXME is it urb->interval since the last xfer? | |
1701 | * this almost certainly polls too fast. | |
1702 | */ | |
1703 | limit = max (limit, periodic_bytes (dum, ep)); | |
1704 | /* FALLTHROUGH */ | |
1705 | ||
1706 | // case PIPE_BULK: case PIPE_CONTROL: | |
1707 | default: | |
1708 | treat_control_like_bulk: | |
1709 | ep->last_io = jiffies; | |
4d2f110c | 1710 | total = transfer(dum, urb, ep, limit, &status); |
1da177e4 LT |
1711 | break; |
1712 | } | |
1713 | ||
1714 | /* incomplete transfer? */ | |
4d2f110c | 1715 | if (status == -EINPROGRESS) |
1da177e4 LT |
1716 | continue; |
1717 | ||
1718 | return_urb: | |
1da177e4 LT |
1719 | list_del (&urbp->urbp_list); |
1720 | kfree (urbp); | |
1721 | if (ep) | |
1722 | ep->already_seen = ep->setup_stage = 0; | |
1723 | ||
cdfcbd2c | 1724 | usb_hcd_unlink_urb_from_ep(dummy_hcd_to_hcd(dum_hcd), urb); |
1da177e4 | 1725 | spin_unlock (&dum->lock); |
cdfcbd2c | 1726 | usb_hcd_giveback_urb(dummy_hcd_to_hcd(dum_hcd), urb, status); |
1da177e4 LT |
1727 | spin_lock (&dum->lock); |
1728 | ||
1729 | goto restart; | |
1730 | } | |
1731 | ||
cdfcbd2c TB |
1732 | if (list_empty(&dum_hcd->urbp_list)) { |
1733 | usb_put_dev(dum_hcd->udev); | |
1734 | dum_hcd->udev = NULL; | |
1735 | } else if (dum_hcd->rh_state == DUMMY_RH_RUNNING) { | |
391eca9d | 1736 | /* want a 1 msec delay here */ |
cdfcbd2c | 1737 | mod_timer(&dum_hcd->timer, jiffies + msecs_to_jiffies(1)); |
1da177e4 LT |
1738 | } |
1739 | ||
1740 | spin_unlock_irqrestore (&dum->lock, flags); | |
1741 | } | |
1742 | ||
1743 | /*-------------------------------------------------------------------------*/ | |
1744 | ||
1745 | #define PORT_C_MASK \ | |
c2db8b5e AS |
1746 | ((USB_PORT_STAT_C_CONNECTION \ |
1747 | | USB_PORT_STAT_C_ENABLE \ | |
1748 | | USB_PORT_STAT_C_SUSPEND \ | |
1749 | | USB_PORT_STAT_C_OVERCURRENT \ | |
1750 | | USB_PORT_STAT_C_RESET) << 16) | |
1da177e4 LT |
1751 | |
1752 | static int dummy_hub_status (struct usb_hcd *hcd, char *buf) | |
1753 | { | |
cdfcbd2c | 1754 | struct dummy_hcd *dum_hcd; |
1da177e4 | 1755 | unsigned long flags; |
391eca9d | 1756 | int retval = 0; |
1da177e4 | 1757 | |
cdfcbd2c | 1758 | dum_hcd = hcd_to_dummy_hcd(hcd); |
1da177e4 | 1759 | |
cdfcbd2c | 1760 | spin_lock_irqsave(&dum_hcd->dum->lock, flags); |
541c7d43 | 1761 | if (!HCD_HW_ACCESSIBLE(hcd)) |
391eca9d | 1762 | goto done; |
f1c39fad | 1763 | |
cdfcbd2c TB |
1764 | if (dum_hcd->resuming && time_after_eq(jiffies, dum_hcd->re_timeout)) { |
1765 | dum_hcd->port_status |= (USB_PORT_STAT_C_SUSPEND << 16); | |
1766 | dum_hcd->port_status &= ~USB_PORT_STAT_SUSPEND; | |
1767 | set_link_state(dum_hcd); | |
f1c39fad AS |
1768 | } |
1769 | ||
cdfcbd2c | 1770 | if ((dum_hcd->port_status & PORT_C_MASK) != 0) { |
1da177e4 | 1771 | *buf = (1 << 1); |
cdfcbd2c TB |
1772 | dev_dbg(dummy_dev(dum_hcd), "port status 0x%08x has changes\n", |
1773 | dum_hcd->port_status); | |
1da177e4 | 1774 | retval = 1; |
cdfcbd2c | 1775 | if (dum_hcd->rh_state == DUMMY_RH_SUSPENDED) |
391eca9d | 1776 | usb_hcd_resume_root_hub (hcd); |
1da177e4 | 1777 | } |
391eca9d | 1778 | done: |
cdfcbd2c | 1779 | spin_unlock_irqrestore(&dum_hcd->dum->lock, flags); |
1da177e4 LT |
1780 | return retval; |
1781 | } | |
1782 | ||
1cd8fd28 TB |
1783 | static inline void |
1784 | ss_hub_descriptor(struct usb_hub_descriptor *desc) | |
1785 | { | |
1786 | memset(desc, 0, sizeof *desc); | |
1787 | desc->bDescriptorType = 0x2a; | |
1788 | desc->bDescLength = 12; | |
1789 | desc->wHubCharacteristics = cpu_to_le16(0x0001); | |
1790 | desc->bNbrPorts = 1; | |
1791 | desc->u.ss.bHubHdrDecLat = 0x04; /* Worst case: 0.4 micro sec*/ | |
1792 | desc->u.ss.DeviceRemovable = 0xffff; | |
1793 | } | |
1794 | ||
1da177e4 LT |
1795 | static inline void |
1796 | hub_descriptor (struct usb_hub_descriptor *desc) | |
1797 | { | |
1798 | memset (desc, 0, sizeof *desc); | |
1799 | desc->bDescriptorType = 0x29; | |
1800 | desc->bDescLength = 9; | |
fd05e720 | 1801 | desc->wHubCharacteristics = cpu_to_le16(0x0001); |
1da177e4 | 1802 | desc->bNbrPorts = 1; |
dbe79bbe JY |
1803 | desc->u.hs.DeviceRemovable[0] = 0xff; |
1804 | desc->u.hs.DeviceRemovable[1] = 0xff; | |
1da177e4 LT |
1805 | } |
1806 | ||
1807 | static int dummy_hub_control ( | |
1808 | struct usb_hcd *hcd, | |
1809 | u16 typeReq, | |
1810 | u16 wValue, | |
1811 | u16 wIndex, | |
1812 | char *buf, | |
1813 | u16 wLength | |
1814 | ) { | |
cdfcbd2c | 1815 | struct dummy_hcd *dum_hcd; |
1da177e4 LT |
1816 | int retval = 0; |
1817 | unsigned long flags; | |
1818 | ||
541c7d43 | 1819 | if (!HCD_HW_ACCESSIBLE(hcd)) |
391eca9d AS |
1820 | return -ETIMEDOUT; |
1821 | ||
cdfcbd2c TB |
1822 | dum_hcd = hcd_to_dummy_hcd(hcd); |
1823 | ||
1824 | spin_lock_irqsave(&dum_hcd->dum->lock, flags); | |
1da177e4 LT |
1825 | switch (typeReq) { |
1826 | case ClearHubFeature: | |
1827 | break; | |
1828 | case ClearPortFeature: | |
1829 | switch (wValue) { | |
1830 | case USB_PORT_FEAT_SUSPEND: | |
1cd8fd28 TB |
1831 | if (hcd->speed == HCD_USB3) { |
1832 | dev_dbg(dummy_dev(dum_hcd), | |
1833 | "USB_PORT_FEAT_SUSPEND req not " | |
1834 | "supported for USB 3.0 roothub\n"); | |
1835 | goto error; | |
1836 | } | |
cdfcbd2c | 1837 | if (dum_hcd->port_status & USB_PORT_STAT_SUSPEND) { |
1da177e4 | 1838 | /* 20msec resume signaling */ |
cdfcbd2c TB |
1839 | dum_hcd->resuming = 1; |
1840 | dum_hcd->re_timeout = jiffies + | |
f1c39fad | 1841 | msecs_to_jiffies(20); |
1da177e4 LT |
1842 | } |
1843 | break; | |
1844 | case USB_PORT_FEAT_POWER: | |
1cd8fd28 TB |
1845 | if (hcd->speed == HCD_USB3) { |
1846 | if (dum_hcd->port_status & USB_PORT_STAT_POWER) | |
1847 | dev_dbg(dummy_dev(dum_hcd), | |
1848 | "power-off\n"); | |
1849 | } else | |
1850 | if (dum_hcd->port_status & | |
1851 | USB_SS_PORT_STAT_POWER) | |
1852 | dev_dbg(dummy_dev(dum_hcd), | |
1853 | "power-off\n"); | |
f1c39fad | 1854 | /* FALLS THROUGH */ |
1da177e4 | 1855 | default: |
cdfcbd2c TB |
1856 | dum_hcd->port_status &= ~(1 << wValue); |
1857 | set_link_state(dum_hcd); | |
1da177e4 LT |
1858 | } |
1859 | break; | |
1860 | case GetHubDescriptor: | |
1cd8fd28 TB |
1861 | if (hcd->speed == HCD_USB3 && |
1862 | (wLength < USB_DT_SS_HUB_SIZE || | |
1863 | wValue != (USB_DT_SS_HUB << 8))) { | |
1864 | dev_dbg(dummy_dev(dum_hcd), | |
1865 | "Wrong hub descriptor type for " | |
1866 | "USB 3.0 roothub.\n"); | |
1867 | goto error; | |
1868 | } | |
1869 | if (hcd->speed == HCD_USB3) | |
1870 | ss_hub_descriptor((struct usb_hub_descriptor *) buf); | |
1871 | else | |
1872 | hub_descriptor((struct usb_hub_descriptor *) buf); | |
1da177e4 LT |
1873 | break; |
1874 | case GetHubStatus: | |
551509d2 | 1875 | *(__le32 *) buf = cpu_to_le32 (0); |
1da177e4 LT |
1876 | break; |
1877 | case GetPortStatus: | |
1878 | if (wIndex != 1) | |
1879 | retval = -EPIPE; | |
1880 | ||
1881 | /* whoever resets or resumes must GetPortStatus to | |
1882 | * complete it!! | |
1883 | */ | |
cdfcbd2c TB |
1884 | if (dum_hcd->resuming && |
1885 | time_after_eq(jiffies, dum_hcd->re_timeout)) { | |
1886 | dum_hcd->port_status |= (USB_PORT_STAT_C_SUSPEND << 16); | |
1887 | dum_hcd->port_status &= ~USB_PORT_STAT_SUSPEND; | |
1da177e4 | 1888 | } |
cdfcbd2c TB |
1889 | if ((dum_hcd->port_status & USB_PORT_STAT_RESET) != 0 && |
1890 | time_after_eq(jiffies, dum_hcd->re_timeout)) { | |
1891 | dum_hcd->port_status |= (USB_PORT_STAT_C_RESET << 16); | |
1892 | dum_hcd->port_status &= ~USB_PORT_STAT_RESET; | |
1893 | if (dum_hcd->dum->pullup) { | |
1894 | dum_hcd->port_status |= USB_PORT_STAT_ENABLE; | |
1cd8fd28 TB |
1895 | |
1896 | if (hcd->speed < HCD_USB3) { | |
1897 | switch (dum_hcd->dum->gadget.speed) { | |
1898 | case USB_SPEED_HIGH: | |
1899 | dum_hcd->port_status |= | |
1900 | USB_PORT_STAT_HIGH_SPEED; | |
1901 | break; | |
1902 | case USB_SPEED_LOW: | |
1903 | dum_hcd->dum->gadget.ep0-> | |
1904 | maxpacket = 8; | |
1905 | dum_hcd->port_status |= | |
1906 | USB_PORT_STAT_LOW_SPEED; | |
1907 | break; | |
1908 | default: | |
1909 | dum_hcd->dum->gadget.speed = | |
1910 | USB_SPEED_FULL; | |
1911 | break; | |
1912 | } | |
1da177e4 LT |
1913 | } |
1914 | } | |
1915 | } | |
cdfcbd2c TB |
1916 | set_link_state(dum_hcd); |
1917 | ((__le16 *) buf)[0] = cpu_to_le16 (dum_hcd->port_status); | |
1918 | ((__le16 *) buf)[1] = cpu_to_le16 (dum_hcd->port_status >> 16); | |
1da177e4 LT |
1919 | break; |
1920 | case SetHubFeature: | |
1921 | retval = -EPIPE; | |
1922 | break; | |
1923 | case SetPortFeature: | |
1924 | switch (wValue) { | |
1cd8fd28 TB |
1925 | case USB_PORT_FEAT_LINK_STATE: |
1926 | if (hcd->speed != HCD_USB3) { | |
1927 | dev_dbg(dummy_dev(dum_hcd), | |
1928 | "USB_PORT_FEAT_LINK_STATE req not " | |
1929 | "supported for USB 2.0 roothub\n"); | |
1930 | goto error; | |
1931 | } | |
1932 | /* | |
1933 | * Since this is dummy we don't have an actual link so | |
1934 | * there is nothing to do for the SET_LINK_STATE cmd | |
1935 | */ | |
1936 | break; | |
1937 | case USB_PORT_FEAT_U1_TIMEOUT: | |
1938 | case USB_PORT_FEAT_U2_TIMEOUT: | |
1939 | /* TODO: add suspend/resume support! */ | |
1940 | if (hcd->speed != HCD_USB3) { | |
1941 | dev_dbg(dummy_dev(dum_hcd), | |
1942 | "USB_PORT_FEAT_U1/2_TIMEOUT req not " | |
1943 | "supported for USB 2.0 roothub\n"); | |
1944 | goto error; | |
1945 | } | |
1946 | break; | |
1da177e4 | 1947 | case USB_PORT_FEAT_SUSPEND: |
1cd8fd28 TB |
1948 | /* Applicable only for USB2.0 hub */ |
1949 | if (hcd->speed == HCD_USB3) { | |
1950 | dev_dbg(dummy_dev(dum_hcd), | |
1951 | "USB_PORT_FEAT_SUSPEND req not " | |
1952 | "supported for USB 3.0 roothub\n"); | |
1953 | goto error; | |
1954 | } | |
cdfcbd2c TB |
1955 | if (dum_hcd->active) { |
1956 | dum_hcd->port_status |= USB_PORT_STAT_SUSPEND; | |
f1c39fad AS |
1957 | |
1958 | /* HNP would happen here; for now we | |
1959 | * assume b_bus_req is always true. | |
1960 | */ | |
cdfcbd2c | 1961 | set_link_state(dum_hcd); |
f1c39fad | 1962 | if (((1 << USB_DEVICE_B_HNP_ENABLE) |
cdfcbd2c TB |
1963 | & dum_hcd->dum->devstatus) != 0) |
1964 | dev_dbg(dummy_dev(dum_hcd), | |
5742b0c9 | 1965 | "no HNP yet!\n"); |
1da177e4 LT |
1966 | } |
1967 | break; | |
f1c39fad | 1968 | case USB_PORT_FEAT_POWER: |
1cd8fd28 TB |
1969 | if (hcd->speed == HCD_USB3) |
1970 | dum_hcd->port_status |= USB_SS_PORT_STAT_POWER; | |
1971 | else | |
1972 | dum_hcd->port_status |= USB_PORT_STAT_POWER; | |
cdfcbd2c | 1973 | set_link_state(dum_hcd); |
f1c39fad | 1974 | break; |
1cd8fd28 TB |
1975 | case USB_PORT_FEAT_BH_PORT_RESET: |
1976 | /* Applicable only for USB3.0 hub */ | |
1977 | if (hcd->speed != HCD_USB3) { | |
1978 | dev_dbg(dummy_dev(dum_hcd), | |
1979 | "USB_PORT_FEAT_BH_PORT_RESET req not " | |
1980 | "supported for USB 2.0 roothub\n"); | |
1981 | goto error; | |
1982 | } | |
1983 | /* FALLS THROUGH */ | |
1da177e4 | 1984 | case USB_PORT_FEAT_RESET: |
f1c39fad | 1985 | /* if it's already enabled, disable */ |
1cd8fd28 TB |
1986 | if (hcd->speed == HCD_USB3) { |
1987 | dum_hcd->port_status = 0; | |
1988 | dum_hcd->port_status = | |
1989 | (USB_SS_PORT_STAT_POWER | | |
1990 | USB_PORT_STAT_CONNECTION | | |
1991 | USB_PORT_STAT_RESET); | |
1992 | } else | |
1993 | dum_hcd->port_status &= ~(USB_PORT_STAT_ENABLE | |
f1c39fad AS |
1994 | | USB_PORT_STAT_LOW_SPEED |
1995 | | USB_PORT_STAT_HIGH_SPEED); | |
cdfcbd2c TB |
1996 | /* |
1997 | * We want to reset device status. All but the | |
1998 | * Self powered feature | |
1999 | */ | |
2000 | dum_hcd->dum->devstatus &= | |
2001 | (1 << USB_DEVICE_SELF_POWERED); | |
1cd8fd28 TB |
2002 | /* |
2003 | * FIXME USB3.0: what is the correct reset signaling | |
2004 | * interval? Is it still 50msec as for HS? | |
2005 | */ | |
cdfcbd2c | 2006 | dum_hcd->re_timeout = jiffies + msecs_to_jiffies(50); |
f1c39fad | 2007 | /* FALLS THROUGH */ |
1da177e4 | 2008 | default: |
1cd8fd28 TB |
2009 | if (hcd->speed == HCD_USB3) { |
2010 | if ((dum_hcd->port_status & | |
2011 | USB_SS_PORT_STAT_POWER) != 0) { | |
2012 | dum_hcd->port_status |= (1 << wValue); | |
2013 | set_link_state(dum_hcd); | |
2014 | } | |
2015 | } else | |
2016 | if ((dum_hcd->port_status & | |
2017 | USB_PORT_STAT_POWER) != 0) { | |
2018 | dum_hcd->port_status |= (1 << wValue); | |
2019 | set_link_state(dum_hcd); | |
2020 | } | |
2021 | } | |
2022 | break; | |
2023 | case GetPortErrorCount: | |
2024 | if (hcd->speed != HCD_USB3) { | |
2025 | dev_dbg(dummy_dev(dum_hcd), | |
2026 | "GetPortErrorCount req not " | |
2027 | "supported for USB 2.0 roothub\n"); | |
2028 | goto error; | |
2029 | } | |
2030 | /* We'll always return 0 since this is a dummy hub */ | |
2031 | *(__le32 *) buf = cpu_to_le32(0); | |
2032 | break; | |
2033 | case SetHubDepth: | |
2034 | if (hcd->speed != HCD_USB3) { | |
2035 | dev_dbg(dummy_dev(dum_hcd), | |
2036 | "SetHubDepth req not supported for " | |
2037 | "USB 2.0 roothub\n"); | |
2038 | goto error; | |
1da177e4 LT |
2039 | } |
2040 | break; | |
1da177e4 | 2041 | default: |
cdfcbd2c | 2042 | dev_dbg(dummy_dev(dum_hcd), |
1da177e4 LT |
2043 | "hub control req%04x v%04x i%04x l%d\n", |
2044 | typeReq, wValue, wIndex, wLength); | |
1cd8fd28 | 2045 | error: |
1da177e4 LT |
2046 | /* "protocol stall" on error */ |
2047 | retval = -EPIPE; | |
2048 | } | |
cdfcbd2c | 2049 | spin_unlock_irqrestore(&dum_hcd->dum->lock, flags); |
685eb93f | 2050 | |
cdfcbd2c | 2051 | if ((dum_hcd->port_status & PORT_C_MASK) != 0) |
685eb93f | 2052 | usb_hcd_poll_rh_status (hcd); |
1da177e4 LT |
2053 | return retval; |
2054 | } | |
2055 | ||
0c0382e3 | 2056 | static int dummy_bus_suspend (struct usb_hcd *hcd) |
391eca9d | 2057 | { |
cdfcbd2c | 2058 | struct dummy_hcd *dum_hcd = hcd_to_dummy_hcd(hcd); |
391eca9d | 2059 | |
441b62c1 | 2060 | dev_dbg (&hcd->self.root_hub->dev, "%s\n", __func__); |
3cf0a22e | 2061 | |
cdfcbd2c TB |
2062 | spin_lock_irq(&dum_hcd->dum->lock); |
2063 | dum_hcd->rh_state = DUMMY_RH_SUSPENDED; | |
2064 | set_link_state(dum_hcd); | |
3cf0a22e | 2065 | hcd->state = HC_STATE_SUSPENDED; |
cdfcbd2c | 2066 | spin_unlock_irq(&dum_hcd->dum->lock); |
391eca9d AS |
2067 | return 0; |
2068 | } | |
2069 | ||
0c0382e3 | 2070 | static int dummy_bus_resume (struct usb_hcd *hcd) |
391eca9d | 2071 | { |
cdfcbd2c | 2072 | struct dummy_hcd *dum_hcd = hcd_to_dummy_hcd(hcd); |
3cf0a22e AS |
2073 | int rc = 0; |
2074 | ||
441b62c1 | 2075 | dev_dbg (&hcd->self.root_hub->dev, "%s\n", __func__); |
391eca9d | 2076 | |
cdfcbd2c | 2077 | spin_lock_irq(&dum_hcd->dum->lock); |
541c7d43 | 2078 | if (!HCD_HW_ACCESSIBLE(hcd)) { |
cfa59dab | 2079 | rc = -ESHUTDOWN; |
3cf0a22e | 2080 | } else { |
cdfcbd2c TB |
2081 | dum_hcd->rh_state = DUMMY_RH_RUNNING; |
2082 | set_link_state(dum_hcd); | |
2083 | if (!list_empty(&dum_hcd->urbp_list)) | |
2084 | mod_timer(&dum_hcd->timer, jiffies); | |
3cf0a22e AS |
2085 | hcd->state = HC_STATE_RUNNING; |
2086 | } | |
cdfcbd2c | 2087 | spin_unlock_irq(&dum_hcd->dum->lock); |
3cf0a22e | 2088 | return rc; |
391eca9d | 2089 | } |
1da177e4 LT |
2090 | |
2091 | /*-------------------------------------------------------------------------*/ | |
2092 | ||
2093 | static inline ssize_t | |
2094 | show_urb (char *buf, size_t size, struct urb *urb) | |
2095 | { | |
2096 | int ep = usb_pipeendpoint (urb->pipe); | |
2097 | ||
2098 | return snprintf (buf, size, | |
2099 | "urb/%p %s ep%d%s%s len %d/%d\n", | |
2100 | urb, | |
2101 | ({ char *s; | |
2102 | switch (urb->dev->speed) { | |
7c884fe4 TB |
2103 | case USB_SPEED_LOW: |
2104 | s = "ls"; | |
2105 | break; | |
2106 | case USB_SPEED_FULL: | |
2107 | s = "fs"; | |
2108 | break; | |
2109 | case USB_SPEED_HIGH: | |
2110 | s = "hs"; | |
2111 | break; | |
1cd8fd28 TB |
2112 | case USB_SPEED_SUPER: |
2113 | s = "ss"; | |
2114 | break; | |
7c884fe4 TB |
2115 | default: |
2116 | s = "?"; | |
2117 | break; | |
1da177e4 LT |
2118 | }; s; }), |
2119 | ep, ep ? (usb_pipein (urb->pipe) ? "in" : "out") : "", | |
2120 | ({ char *s; \ | |
2121 | switch (usb_pipetype (urb->pipe)) { \ | |
7c884fe4 TB |
2122 | case PIPE_CONTROL: \ |
2123 | s = ""; \ | |
2124 | break; \ | |
2125 | case PIPE_BULK: \ | |
2126 | s = "-bulk"; \ | |
2127 | break; \ | |
2128 | case PIPE_INTERRUPT: \ | |
2129 | s = "-int"; \ | |
2130 | break; \ | |
2131 | default: \ | |
2132 | s = "-iso"; \ | |
2133 | break; \ | |
1da177e4 LT |
2134 | }; s;}), |
2135 | urb->actual_length, urb->transfer_buffer_length); | |
2136 | } | |
2137 | ||
2138 | static ssize_t | |
10523b3b | 2139 | show_urbs (struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
2140 | { |
2141 | struct usb_hcd *hcd = dev_get_drvdata (dev); | |
cdfcbd2c | 2142 | struct dummy_hcd *dum_hcd = hcd_to_dummy_hcd(hcd); |
1da177e4 LT |
2143 | struct urbp *urbp; |
2144 | size_t size = 0; | |
2145 | unsigned long flags; | |
2146 | ||
cdfcbd2c TB |
2147 | spin_lock_irqsave(&dum_hcd->dum->lock, flags); |
2148 | list_for_each_entry(urbp, &dum_hcd->urbp_list, urbp_list) { | |
1da177e4 LT |
2149 | size_t temp; |
2150 | ||
2151 | temp = show_urb (buf, PAGE_SIZE - size, urbp->urb); | |
2152 | buf += temp; | |
2153 | size += temp; | |
2154 | } | |
cdfcbd2c | 2155 | spin_unlock_irqrestore(&dum_hcd->dum->lock, flags); |
1da177e4 LT |
2156 | |
2157 | return size; | |
2158 | } | |
2159 | static DEVICE_ATTR (urbs, S_IRUGO, show_urbs, NULL); | |
2160 | ||
1cd8fd28 TB |
2161 | static int dummy_start_ss(struct dummy_hcd *dum_hcd) |
2162 | { | |
2163 | init_timer(&dum_hcd->timer); | |
2164 | dum_hcd->timer.function = dummy_timer; | |
2165 | dum_hcd->timer.data = (unsigned long)dum_hcd; | |
2166 | dum_hcd->rh_state = DUMMY_RH_RUNNING; | |
2167 | INIT_LIST_HEAD(&dum_hcd->urbp_list); | |
2168 | dummy_hcd_to_hcd(dum_hcd)->power_budget = POWER_BUDGET; | |
2169 | dummy_hcd_to_hcd(dum_hcd)->state = HC_STATE_RUNNING; | |
2170 | dummy_hcd_to_hcd(dum_hcd)->uses_new_polling = 1; | |
2171 | #ifdef CONFIG_USB_OTG | |
2172 | dummy_hcd_to_hcd(dum_hcd)->self.otg_port = 1; | |
2173 | #endif | |
2174 | return 0; | |
2175 | ||
2176 | /* FIXME 'urbs' should be a per-device thing, maybe in usbcore */ | |
2177 | return device_create_file(dummy_dev(dum_hcd), &dev_attr_urbs); | |
2178 | } | |
2179 | ||
cdfcbd2c | 2180 | static int dummy_start(struct usb_hcd *hcd) |
1da177e4 | 2181 | { |
cdfcbd2c | 2182 | struct dummy_hcd *dum_hcd = hcd_to_dummy_hcd(hcd); |
1da177e4 LT |
2183 | |
2184 | /* | |
2185 | * MASTER side init ... we emulate a root hub that'll only ever | |
2186 | * talk to one device (the slave side). Also appears in sysfs, | |
2187 | * just like more familiar pci-based HCDs. | |
2188 | */ | |
1cd8fd28 TB |
2189 | if (!usb_hcd_is_primary_hcd(hcd)) |
2190 | return dummy_start_ss(dum_hcd); | |
2191 | ||
cdfcbd2c TB |
2192 | spin_lock_init(&dum_hcd->dum->lock); |
2193 | init_timer(&dum_hcd->timer); | |
2194 | dum_hcd->timer.function = dummy_timer; | |
2195 | dum_hcd->timer.data = (unsigned long)dum_hcd; | |
2196 | dum_hcd->rh_state = DUMMY_RH_RUNNING; | |
1da177e4 | 2197 | |
cdfcbd2c | 2198 | INIT_LIST_HEAD(&dum_hcd->urbp_list); |
1da177e4 | 2199 | |
caf29f62 | 2200 | hcd->power_budget = POWER_BUDGET; |
1da177e4 | 2201 | hcd->state = HC_STATE_RUNNING; |
685eb93f | 2202 | hcd->uses_new_polling = 1; |
1da177e4 | 2203 | |
5742b0c9 AS |
2204 | #ifdef CONFIG_USB_OTG |
2205 | hcd->self.otg_port = 1; | |
2206 | #endif | |
2207 | ||
1da177e4 | 2208 | /* FIXME 'urbs' should be a per-device thing, maybe in usbcore */ |
cdfcbd2c | 2209 | return device_create_file(dummy_dev(dum_hcd), &dev_attr_urbs); |
1da177e4 LT |
2210 | } |
2211 | ||
2212 | static void dummy_stop (struct usb_hcd *hcd) | |
2213 | { | |
2214 | struct dummy *dum; | |
2215 | ||
cdfcbd2c TB |
2216 | dum = (hcd_to_dummy_hcd(hcd))->dum; |
2217 | device_remove_file(dummy_dev(hcd_to_dummy_hcd(hcd)), &dev_attr_urbs); | |
2218 | usb_gadget_unregister_driver(dum->driver); | |
2219 | dev_info(dummy_dev(hcd_to_dummy_hcd(hcd)), "stopped\n"); | |
1da177e4 LT |
2220 | } |
2221 | ||
2222 | /*-------------------------------------------------------------------------*/ | |
2223 | ||
2224 | static int dummy_h_get_frame (struct usb_hcd *hcd) | |
2225 | { | |
2226 | return dummy_g_get_frame (NULL); | |
2227 | } | |
2228 | ||
cdfcbd2c TB |
2229 | static int dummy_setup(struct usb_hcd *hcd) |
2230 | { | |
2231 | if (usb_hcd_is_primary_hcd(hcd)) { | |
2232 | the_controller.hs_hcd = hcd_to_dummy_hcd(hcd); | |
2233 | the_controller.hs_hcd->dum = &the_controller; | |
1cd8fd28 TB |
2234 | /* |
2235 | * Mark the first roothub as being USB 2.0. | |
2236 | * The USB 3.0 roothub will be registered later by | |
2237 | * dummy_hcd_probe() | |
2238 | */ | |
cdfcbd2c TB |
2239 | hcd->speed = HCD_USB2; |
2240 | hcd->self.root_hub->speed = USB_SPEED_HIGH; | |
1cd8fd28 TB |
2241 | } else { |
2242 | the_controller.ss_hcd = hcd_to_dummy_hcd(hcd); | |
2243 | the_controller.ss_hcd->dum = &the_controller; | |
2244 | hcd->speed = HCD_USB3; | |
2245 | hcd->self.root_hub->speed = USB_SPEED_SUPER; | |
cdfcbd2c TB |
2246 | } |
2247 | return 0; | |
2248 | } | |
2249 | ||
1cd8fd28 TB |
2250 | /* Change a group of bulk endpoints to support multiple stream IDs */ |
2251 | int dummy_alloc_streams(struct usb_hcd *hcd, struct usb_device *udev, | |
2252 | struct usb_host_endpoint **eps, unsigned int num_eps, | |
2253 | unsigned int num_streams, gfp_t mem_flags) | |
2254 | { | |
2255 | if (hcd->speed != HCD_USB3) | |
2256 | dev_dbg(dummy_dev(hcd_to_dummy_hcd(hcd)), | |
2257 | "%s() - ERROR! Not supported for USB2.0 roothub\n", | |
2258 | __func__); | |
2259 | return 0; | |
2260 | } | |
2261 | ||
2262 | /* Reverts a group of bulk endpoints back to not using stream IDs. */ | |
2263 | int dummy_free_streams(struct usb_hcd *hcd, struct usb_device *udev, | |
2264 | struct usb_host_endpoint **eps, unsigned int num_eps, | |
2265 | gfp_t mem_flags) | |
2266 | { | |
2267 | if (hcd->speed != HCD_USB3) | |
2268 | dev_dbg(dummy_dev(hcd_to_dummy_hcd(hcd)), | |
2269 | "%s() - ERROR! Not supported for USB2.0 roothub\n", | |
2270 | __func__); | |
2271 | return 0; | |
2272 | } | |
2273 | ||
2274 | static struct hc_driver dummy_hcd = { | |
1da177e4 LT |
2275 | .description = (char *) driver_name, |
2276 | .product_desc = "Dummy host controller", | |
cdfcbd2c | 2277 | .hcd_priv_size = sizeof(struct dummy_hcd), |
1da177e4 | 2278 | |
1cd8fd28 | 2279 | .flags = HCD_USB3 | HCD_SHARED, |
1da177e4 | 2280 | |
cdfcbd2c | 2281 | .reset = dummy_setup, |
1da177e4 LT |
2282 | .start = dummy_start, |
2283 | .stop = dummy_stop, | |
2284 | ||
2285 | .urb_enqueue = dummy_urb_enqueue, | |
2286 | .urb_dequeue = dummy_urb_dequeue, | |
2287 | ||
2288 | .get_frame_number = dummy_h_get_frame, | |
2289 | ||
2290 | .hub_status_data = dummy_hub_status, | |
2291 | .hub_control = dummy_hub_control, | |
0c0382e3 AS |
2292 | .bus_suspend = dummy_bus_suspend, |
2293 | .bus_resume = dummy_bus_resume, | |
1cd8fd28 TB |
2294 | |
2295 | .alloc_streams = dummy_alloc_streams, | |
2296 | .free_streams = dummy_free_streams, | |
1da177e4 LT |
2297 | }; |
2298 | ||
8364d6b0 | 2299 | static int dummy_hcd_probe(struct platform_device *pdev) |
1da177e4 | 2300 | { |
cdfcbd2c | 2301 | struct usb_hcd *hs_hcd; |
1cd8fd28 | 2302 | struct usb_hcd *ss_hcd; |
1da177e4 LT |
2303 | int retval; |
2304 | ||
8364d6b0 | 2305 | dev_info(&pdev->dev, "%s, driver " DRIVER_VERSION "\n", driver_desc); |
1da177e4 | 2306 | |
1cd8fd28 TB |
2307 | if (!mod_data.is_super_speed) |
2308 | dummy_hcd.flags = HCD_USB2; | |
cdfcbd2c TB |
2309 | hs_hcd = usb_create_hcd(&dummy_hcd, &pdev->dev, dev_name(&pdev->dev)); |
2310 | if (!hs_hcd) | |
1da177e4 | 2311 | return -ENOMEM; |
cdfcbd2c | 2312 | hs_hcd->has_tt = 1; |
1da177e4 | 2313 | |
cdfcbd2c | 2314 | retval = usb_add_hcd(hs_hcd, 0, 0); |
1da177e4 | 2315 | if (retval != 0) { |
cdfcbd2c | 2316 | usb_put_hcd(hs_hcd); |
1cd8fd28 | 2317 | return retval; |
1da177e4 | 2318 | } |
1cd8fd28 TB |
2319 | |
2320 | if (mod_data.is_super_speed) { | |
2321 | ss_hcd = usb_create_shared_hcd(&dummy_hcd, &pdev->dev, | |
2322 | dev_name(&pdev->dev), hs_hcd); | |
2323 | if (!ss_hcd) { | |
2324 | retval = -ENOMEM; | |
2325 | goto dealloc_usb2_hcd; | |
2326 | } | |
2327 | ||
2328 | retval = usb_add_hcd(ss_hcd, 0, 0); | |
2329 | if (retval) | |
2330 | goto put_usb3_hcd; | |
2331 | } | |
2332 | return 0; | |
2333 | ||
2334 | put_usb3_hcd: | |
2335 | usb_put_hcd(ss_hcd); | |
2336 | dealloc_usb2_hcd: | |
2337 | usb_put_hcd(hs_hcd); | |
2338 | the_controller.hs_hcd = the_controller.ss_hcd = NULL; | |
1da177e4 LT |
2339 | return retval; |
2340 | } | |
2341 | ||
cdfcbd2c | 2342 | static int dummy_hcd_remove(struct platform_device *pdev) |
1da177e4 | 2343 | { |
cdfcbd2c TB |
2344 | struct dummy *dum; |
2345 | ||
2346 | dum = (hcd_to_dummy_hcd(platform_get_drvdata(pdev)))->dum; | |
1cd8fd28 TB |
2347 | |
2348 | if (dum->ss_hcd) { | |
2349 | usb_remove_hcd(dummy_hcd_to_hcd(dum->ss_hcd)); | |
2350 | usb_put_hcd(dummy_hcd_to_hcd(dum->ss_hcd)); | |
2351 | } | |
2352 | ||
cdfcbd2c TB |
2353 | usb_remove_hcd(dummy_hcd_to_hcd(dum->hs_hcd)); |
2354 | usb_put_hcd(dummy_hcd_to_hcd(dum->hs_hcd)); | |
1cd8fd28 | 2355 | |
cdfcbd2c | 2356 | the_controller.hs_hcd = NULL; |
1cd8fd28 | 2357 | the_controller.ss_hcd = NULL; |
1da177e4 | 2358 | |
d9b76251 | 2359 | return 0; |
1da177e4 LT |
2360 | } |
2361 | ||
8364d6b0 | 2362 | static int dummy_hcd_suspend (struct platform_device *pdev, pm_message_t state) |
391eca9d AS |
2363 | { |
2364 | struct usb_hcd *hcd; | |
cdfcbd2c | 2365 | struct dummy_hcd *dum_hcd; |
3cf0a22e | 2366 | int rc = 0; |
391eca9d | 2367 | |
441b62c1 | 2368 | dev_dbg (&pdev->dev, "%s\n", __func__); |
391eca9d | 2369 | |
3cf0a22e | 2370 | hcd = platform_get_drvdata (pdev); |
cdfcbd2c TB |
2371 | dum_hcd = hcd_to_dummy_hcd(hcd); |
2372 | if (dum_hcd->rh_state == DUMMY_RH_RUNNING) { | |
3cf0a22e AS |
2373 | dev_warn(&pdev->dev, "Root hub isn't suspended!\n"); |
2374 | rc = -EBUSY; | |
2375 | } else | |
2376 | clear_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags); | |
2377 | return rc; | |
391eca9d AS |
2378 | } |
2379 | ||
8364d6b0 | 2380 | static int dummy_hcd_resume (struct platform_device *pdev) |
391eca9d AS |
2381 | { |
2382 | struct usb_hcd *hcd; | |
2383 | ||
441b62c1 | 2384 | dev_dbg (&pdev->dev, "%s\n", __func__); |
391eca9d | 2385 | |
3cf0a22e AS |
2386 | hcd = platform_get_drvdata (pdev); |
2387 | set_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags); | |
391eca9d AS |
2388 | usb_hcd_poll_rh_status (hcd); |
2389 | return 0; | |
2390 | } | |
2391 | ||
3ae5eaec | 2392 | static struct platform_driver dummy_hcd_driver = { |
d9b76251 AS |
2393 | .probe = dummy_hcd_probe, |
2394 | .remove = dummy_hcd_remove, | |
391eca9d AS |
2395 | .suspend = dummy_hcd_suspend, |
2396 | .resume = dummy_hcd_resume, | |
3ae5eaec RK |
2397 | .driver = { |
2398 | .name = (char *) driver_name, | |
2399 | .owner = THIS_MODULE, | |
2400 | }, | |
d9b76251 | 2401 | }; |
1da177e4 | 2402 | |
d9b76251 | 2403 | /*-------------------------------------------------------------------------*/ |
1da177e4 | 2404 | |
a89a2cd3 AS |
2405 | static struct platform_device *the_udc_pdev; |
2406 | static struct platform_device *the_hcd_pdev; | |
1da177e4 LT |
2407 | |
2408 | static int __init init (void) | |
2409 | { | |
a89a2cd3 | 2410 | int retval = -ENOMEM; |
1da177e4 LT |
2411 | |
2412 | if (usb_disabled ()) | |
2413 | return -ENODEV; | |
d9b76251 | 2414 | |
7eca4c5a TB |
2415 | if (!mod_data.is_high_speed && mod_data.is_super_speed) |
2416 | return -EINVAL; | |
2417 | ||
a89a2cd3 AS |
2418 | the_hcd_pdev = platform_device_alloc(driver_name, -1); |
2419 | if (!the_hcd_pdev) | |
1da177e4 | 2420 | return retval; |
a89a2cd3 AS |
2421 | the_udc_pdev = platform_device_alloc(gadget_name, -1); |
2422 | if (!the_udc_pdev) | |
2423 | goto err_alloc_udc; | |
d9b76251 | 2424 | |
a89a2cd3 AS |
2425 | retval = platform_driver_register(&dummy_hcd_driver); |
2426 | if (retval < 0) | |
2427 | goto err_register_hcd_driver; | |
2428 | retval = platform_driver_register(&dummy_udc_driver); | |
d9b76251 AS |
2429 | if (retval < 0) |
2430 | goto err_register_udc_driver; | |
2431 | ||
a89a2cd3 | 2432 | retval = platform_device_add(the_hcd_pdev); |
d9b76251 | 2433 | if (retval < 0) |
a89a2cd3 | 2434 | goto err_add_hcd; |
1cd8fd28 TB |
2435 | if (!the_controller.hs_hcd || |
2436 | (!the_controller.ss_hcd && mod_data.is_super_speed)) { | |
865835fa SAS |
2437 | /* |
2438 | * The hcd was added successfully but its probe function failed | |
2439 | * for some reason. | |
2440 | */ | |
2441 | retval = -EINVAL; | |
2442 | goto err_add_udc; | |
2443 | } | |
a89a2cd3 | 2444 | retval = platform_device_add(the_udc_pdev); |
d9b76251 | 2445 | if (retval < 0) |
a89a2cd3 | 2446 | goto err_add_udc; |
865835fa SAS |
2447 | if (!platform_get_drvdata(the_udc_pdev)) { |
2448 | /* | |
2449 | * The udc was added successfully but its probe function failed | |
2450 | * for some reason. | |
2451 | */ | |
2452 | retval = -EINVAL; | |
2453 | goto err_probe_udc; | |
2454 | } | |
d9b76251 AS |
2455 | return retval; |
2456 | ||
865835fa SAS |
2457 | err_probe_udc: |
2458 | platform_device_del(the_udc_pdev); | |
a89a2cd3 AS |
2459 | err_add_udc: |
2460 | platform_device_del(the_hcd_pdev); | |
2461 | err_add_hcd: | |
2462 | platform_driver_unregister(&dummy_udc_driver); | |
d9b76251 | 2463 | err_register_udc_driver: |
a89a2cd3 AS |
2464 | platform_driver_unregister(&dummy_hcd_driver); |
2465 | err_register_hcd_driver: | |
2466 | platform_device_put(the_udc_pdev); | |
2467 | err_alloc_udc: | |
2468 | platform_device_put(the_hcd_pdev); | |
1da177e4 LT |
2469 | return retval; |
2470 | } | |
2471 | module_init (init); | |
2472 | ||
2473 | static void __exit cleanup (void) | |
2474 | { | |
a89a2cd3 AS |
2475 | platform_device_unregister(the_udc_pdev); |
2476 | platform_device_unregister(the_hcd_pdev); | |
2477 | platform_driver_unregister(&dummy_udc_driver); | |
2478 | platform_driver_unregister(&dummy_hcd_driver); | |
1da177e4 LT |
2479 | } |
2480 | module_exit (cleanup); |