Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * dummy_hcd.c -- Dummy/Loopback USB host and device emulator driver. | |
3 | * | |
4 | * Maintainer: Alan Stern <stern@rowland.harvard.edu> | |
5 | * | |
6 | * Copyright (C) 2003 David Brownell | |
7 | * Copyright (C) 2003-2005 Alan Stern | |
8 | * | |
9 | * This program is free software; you can redistribute it and/or modify | |
10 | * it under the terms of the GNU General Public License as published by | |
11 | * the Free Software Foundation; either version 2 of the License, or | |
12 | * (at your option) any later version. | |
1da177e4 LT |
13 | */ |
14 | ||
15 | ||
16 | /* | |
17 | * This exposes a device side "USB gadget" API, driven by requests to a | |
18 | * Linux-USB host controller driver. USB traffic is simulated; there's | |
19 | * no need for USB hardware. Use this with two other drivers: | |
20 | * | |
21 | * - Gadget driver, responding to requests (slave); | |
22 | * - Host-side device driver, as already familiar in Linux. | |
23 | * | |
24 | * Having this all in one kernel can help some stages of development, | |
25 | * bypassing some hardware (and driver) issues. UML could help too. | |
26 | */ | |
27 | ||
1da177e4 LT |
28 | #include <linux/module.h> |
29 | #include <linux/kernel.h> | |
30 | #include <linux/delay.h> | |
31 | #include <linux/ioport.h> | |
1da177e4 | 32 | #include <linux/slab.h> |
1da177e4 LT |
33 | #include <linux/errno.h> |
34 | #include <linux/init.h> | |
35 | #include <linux/timer.h> | |
36 | #include <linux/list.h> | |
37 | #include <linux/interrupt.h> | |
d052d1be | 38 | #include <linux/platform_device.h> |
1da177e4 | 39 | #include <linux/usb.h> |
9454a57a | 40 | #include <linux/usb/gadget.h> |
27729aad | 41 | #include <linux/usb/hcd.h> |
14fce33a | 42 | #include <linux/scatterlist.h> |
1da177e4 LT |
43 | |
44 | #include <asm/byteorder.h> | |
18f2cbaa | 45 | #include <linux/io.h> |
1da177e4 | 46 | #include <asm/irq.h> |
1da177e4 LT |
47 | #include <asm/unaligned.h> |
48 | ||
1da177e4 | 49 | #define DRIVER_DESC "USB Host+Gadget Emulator" |
391eca9d | 50 | #define DRIVER_VERSION "02 May 2005" |
1da177e4 | 51 | |
caf29f62 AS |
52 | #define POWER_BUDGET 500 /* in mA; use 8 for low-power port testing */ |
53 | ||
18f2cbaa SAS |
54 | static const char driver_name[] = "dummy_hcd"; |
55 | static const char driver_desc[] = "USB Host+Gadget Emulator"; | |
1da177e4 | 56 | |
18f2cbaa | 57 | static const char gadget_name[] = "dummy_udc"; |
1da177e4 | 58 | |
18f2cbaa SAS |
59 | MODULE_DESCRIPTION(DRIVER_DESC); |
60 | MODULE_AUTHOR("David Brownell"); | |
61 | MODULE_LICENSE("GPL"); | |
1da177e4 | 62 | |
1cd8fd28 TB |
63 | struct dummy_hcd_module_parameters { |
64 | bool is_super_speed; | |
7eca4c5a | 65 | bool is_high_speed; |
c7a1db45 | 66 | unsigned int num; |
1cd8fd28 TB |
67 | }; |
68 | ||
69 | static struct dummy_hcd_module_parameters mod_data = { | |
7eca4c5a TB |
70 | .is_super_speed = false, |
71 | .is_high_speed = true, | |
c7a1db45 | 72 | .num = 1, |
1cd8fd28 TB |
73 | }; |
74 | module_param_named(is_super_speed, mod_data.is_super_speed, bool, S_IRUGO); | |
75 | MODULE_PARM_DESC(is_super_speed, "true to simulate SuperSpeed connection"); | |
7eca4c5a TB |
76 | module_param_named(is_high_speed, mod_data.is_high_speed, bool, S_IRUGO); |
77 | MODULE_PARM_DESC(is_high_speed, "true to simulate HighSpeed connection"); | |
c7a1db45 SAS |
78 | module_param_named(num, mod_data.num, uint, S_IRUGO); |
79 | MODULE_PARM_DESC(num, "number of emulated controllers"); | |
1da177e4 LT |
80 | /*-------------------------------------------------------------------------*/ |
81 | ||
82 | /* gadget side driver data structres */ | |
83 | struct dummy_ep { | |
84 | struct list_head queue; | |
85 | unsigned long last_io; /* jiffies timestamp */ | |
86 | struct usb_gadget *gadget; | |
87 | const struct usb_endpoint_descriptor *desc; | |
88 | struct usb_ep ep; | |
18f2cbaa SAS |
89 | unsigned halted:1; |
90 | unsigned wedged:1; | |
91 | unsigned already_seen:1; | |
92 | unsigned setup_stage:1; | |
a54c979f | 93 | unsigned stream_en:1; |
1da177e4 LT |
94 | }; |
95 | ||
96 | struct dummy_request { | |
97 | struct list_head queue; /* ep's requests */ | |
98 | struct usb_request req; | |
99 | }; | |
100 | ||
18f2cbaa | 101 | static inline struct dummy_ep *usb_ep_to_dummy_ep(struct usb_ep *_ep) |
1da177e4 | 102 | { |
18f2cbaa | 103 | return container_of(_ep, struct dummy_ep, ep); |
1da177e4 LT |
104 | } |
105 | ||
106 | static inline struct dummy_request *usb_request_to_dummy_request | |
107 | (struct usb_request *_req) | |
108 | { | |
18f2cbaa | 109 | return container_of(_req, struct dummy_request, req); |
1da177e4 LT |
110 | } |
111 | ||
112 | /*-------------------------------------------------------------------------*/ | |
113 | ||
114 | /* | |
115 | * Every device has ep0 for control requests, plus up to 30 more endpoints, | |
116 | * in one of two types: | |
117 | * | |
118 | * - Configurable: direction (in/out), type (bulk, iso, etc), and endpoint | |
119 | * number can be changed. Names like "ep-a" are used for this type. | |
120 | * | |
121 | * - Fixed Function: in other cases. some characteristics may be mutable; | |
122 | * that'd be hardware-specific. Names like "ep12out-bulk" are used. | |
123 | * | |
124 | * Gadget drivers are responsible for not setting up conflicting endpoint | |
125 | * configurations, illegal or unsupported packet lengths, and so on. | |
126 | */ | |
127 | ||
18f2cbaa | 128 | static const char ep0name[] = "ep0"; |
1da177e4 | 129 | |
18f2cbaa | 130 | static const char *const ep_name[] = { |
1da177e4 LT |
131 | ep0name, /* everyone has ep0 */ |
132 | ||
133 | /* act like a net2280: high speed, six configurable endpoints */ | |
134 | "ep-a", "ep-b", "ep-c", "ep-d", "ep-e", "ep-f", | |
135 | ||
136 | /* or like pxa250: fifteen fixed function endpoints */ | |
137 | "ep1in-bulk", "ep2out-bulk", "ep3in-iso", "ep4out-iso", "ep5in-int", | |
138 | "ep6in-bulk", "ep7out-bulk", "ep8in-iso", "ep9out-iso", "ep10in-int", | |
139 | "ep11in-bulk", "ep12out-bulk", "ep13in-iso", "ep14out-iso", | |
140 | "ep15in-int", | |
141 | ||
142 | /* or like sa1100: two fixed function endpoints */ | |
143 | "ep1out-bulk", "ep2in-bulk", | |
144 | }; | |
52950ed4 | 145 | #define DUMMY_ENDPOINTS ARRAY_SIZE(ep_name) |
1da177e4 | 146 | |
d9b76251 AS |
147 | /*-------------------------------------------------------------------------*/ |
148 | ||
1da177e4 LT |
149 | #define FIFO_SIZE 64 |
150 | ||
151 | struct urbp { | |
152 | struct urb *urb; | |
153 | struct list_head urbp_list; | |
14fce33a SAS |
154 | struct sg_mapping_iter miter; |
155 | u32 miter_started; | |
1da177e4 LT |
156 | }; |
157 | ||
391eca9d AS |
158 | |
159 | enum dummy_rh_state { | |
160 | DUMMY_RH_RESET, | |
161 | DUMMY_RH_SUSPENDED, | |
162 | DUMMY_RH_RUNNING | |
163 | }; | |
164 | ||
cdfcbd2c TB |
165 | struct dummy_hcd { |
166 | struct dummy *dum; | |
167 | enum dummy_rh_state rh_state; | |
168 | struct timer_list timer; | |
169 | u32 port_status; | |
170 | u32 old_status; | |
171 | unsigned long re_timeout; | |
172 | ||
173 | struct usb_device *udev; | |
174 | struct list_head urbp_list; | |
a54c979f SAS |
175 | u32 stream_en_ep; |
176 | u8 num_stream[30 / 2]; | |
cdfcbd2c TB |
177 | |
178 | unsigned active:1; | |
179 | unsigned old_active:1; | |
180 | unsigned resuming:1; | |
181 | }; | |
182 | ||
1da177e4 LT |
183 | struct dummy { |
184 | spinlock_t lock; | |
185 | ||
186 | /* | |
187 | * SLAVE/GADGET side support | |
188 | */ | |
18f2cbaa | 189 | struct dummy_ep ep[DUMMY_ENDPOINTS]; |
1da177e4 LT |
190 | int address; |
191 | struct usb_gadget gadget; | |
192 | struct usb_gadget_driver *driver; | |
193 | struct dummy_request fifo_req; | |
18f2cbaa | 194 | u8 fifo_buf[FIFO_SIZE]; |
1da177e4 | 195 | u16 devstatus; |
391eca9d | 196 | unsigned udc_suspended:1; |
f1c39fad | 197 | unsigned pullup:1; |
1da177e4 LT |
198 | |
199 | /* | |
200 | * MASTER/HOST side support | |
201 | */ | |
cdfcbd2c | 202 | struct dummy_hcd *hs_hcd; |
1cd8fd28 | 203 | struct dummy_hcd *ss_hcd; |
1da177e4 LT |
204 | }; |
205 | ||
cdfcbd2c | 206 | static inline struct dummy_hcd *hcd_to_dummy_hcd(struct usb_hcd *hcd) |
1da177e4 | 207 | { |
cdfcbd2c | 208 | return (struct dummy_hcd *) (hcd->hcd_priv); |
1da177e4 LT |
209 | } |
210 | ||
cdfcbd2c | 211 | static inline struct usb_hcd *dummy_hcd_to_hcd(struct dummy_hcd *dum) |
1da177e4 LT |
212 | { |
213 | return container_of((void *) dum, struct usb_hcd, hcd_priv); | |
214 | } | |
215 | ||
cdfcbd2c | 216 | static inline struct device *dummy_dev(struct dummy_hcd *dum) |
1da177e4 | 217 | { |
cdfcbd2c | 218 | return dummy_hcd_to_hcd(dum)->self.controller; |
1da177e4 LT |
219 | } |
220 | ||
18f2cbaa | 221 | static inline struct device *udc_dev(struct dummy *dum) |
d9b76251 AS |
222 | { |
223 | return dum->gadget.dev.parent; | |
224 | } | |
225 | ||
18f2cbaa | 226 | static inline struct dummy *ep_to_dummy(struct dummy_ep *ep) |
1da177e4 | 227 | { |
18f2cbaa | 228 | return container_of(ep->gadget, struct dummy, gadget); |
1da177e4 LT |
229 | } |
230 | ||
cdfcbd2c | 231 | static inline struct dummy_hcd *gadget_to_dummy_hcd(struct usb_gadget *gadget) |
1da177e4 | 232 | { |
cdfcbd2c | 233 | struct dummy *dum = container_of(gadget, struct dummy, gadget); |
1cd8fd28 TB |
234 | if (dum->gadget.speed == USB_SPEED_SUPER) |
235 | return dum->ss_hcd; | |
236 | else | |
237 | return dum->hs_hcd; | |
1da177e4 LT |
238 | } |
239 | ||
18f2cbaa | 240 | static inline struct dummy *gadget_dev_to_dummy(struct device *dev) |
1da177e4 | 241 | { |
18f2cbaa | 242 | return container_of(dev, struct dummy, gadget.dev); |
1da177e4 LT |
243 | } |
244 | ||
cdfcbd2c | 245 | static struct dummy the_controller; |
1da177e4 LT |
246 | |
247 | /*-------------------------------------------------------------------------*/ | |
248 | ||
f1c39fad AS |
249 | /* SLAVE/GADGET SIDE UTILITY ROUTINES */ |
250 | ||
251 | /* called with spinlock held */ | |
18f2cbaa | 252 | static void nuke(struct dummy *dum, struct dummy_ep *ep) |
f1c39fad | 253 | { |
18f2cbaa | 254 | while (!list_empty(&ep->queue)) { |
f1c39fad AS |
255 | struct dummy_request *req; |
256 | ||
18f2cbaa SAS |
257 | req = list_entry(ep->queue.next, struct dummy_request, queue); |
258 | list_del_init(&req->queue); | |
f1c39fad AS |
259 | req->req.status = -ESHUTDOWN; |
260 | ||
18f2cbaa SAS |
261 | spin_unlock(&dum->lock); |
262 | req->req.complete(&ep->ep, &req->req); | |
263 | spin_lock(&dum->lock); | |
f1c39fad AS |
264 | } |
265 | } | |
266 | ||
267 | /* caller must hold lock */ | |
18f2cbaa | 268 | static void stop_activity(struct dummy *dum) |
f1c39fad AS |
269 | { |
270 | struct dummy_ep *ep; | |
271 | ||
272 | /* prevent any more requests */ | |
273 | dum->address = 0; | |
274 | ||
275 | /* The timer is left running so that outstanding URBs can fail */ | |
276 | ||
277 | /* nuke any pending requests first, so driver i/o is quiesced */ | |
18f2cbaa SAS |
278 | list_for_each_entry(ep, &dum->gadget.ep_list, ep.ep_list) |
279 | nuke(dum, ep); | |
f1c39fad AS |
280 | |
281 | /* driver now does any non-usb quiescing necessary */ | |
282 | } | |
283 | ||
1cd8fd28 TB |
284 | /** |
285 | * set_link_state_by_speed() - Sets the current state of the link according to | |
286 | * the hcd speed | |
287 | * @dum_hcd: pointer to the dummy_hcd structure to update the link state for | |
288 | * | |
289 | * This function updates the port_status according to the link state and the | |
290 | * speed of the hcd. | |
291 | */ | |
292 | static void set_link_state_by_speed(struct dummy_hcd *dum_hcd) | |
293 | { | |
294 | struct dummy *dum = dum_hcd->dum; | |
295 | ||
296 | if (dummy_hcd_to_hcd(dum_hcd)->speed == HCD_USB3) { | |
297 | if ((dum_hcd->port_status & USB_SS_PORT_STAT_POWER) == 0) { | |
298 | dum_hcd->port_status = 0; | |
299 | } else if (!dum->pullup || dum->udc_suspended) { | |
300 | /* UDC suspend must cause a disconnect */ | |
301 | dum_hcd->port_status &= ~(USB_PORT_STAT_CONNECTION | | |
302 | USB_PORT_STAT_ENABLE); | |
303 | if ((dum_hcd->old_status & | |
304 | USB_PORT_STAT_CONNECTION) != 0) | |
305 | dum_hcd->port_status |= | |
306 | (USB_PORT_STAT_C_CONNECTION << 16); | |
307 | } else { | |
308 | /* device is connected and not suspended */ | |
309 | dum_hcd->port_status |= (USB_PORT_STAT_CONNECTION | | |
310 | USB_PORT_STAT_SPEED_5GBPS) ; | |
311 | if ((dum_hcd->old_status & | |
312 | USB_PORT_STAT_CONNECTION) == 0) | |
313 | dum_hcd->port_status |= | |
314 | (USB_PORT_STAT_C_CONNECTION << 16); | |
315 | if ((dum_hcd->port_status & | |
316 | USB_PORT_STAT_ENABLE) == 1 && | |
317 | (dum_hcd->port_status & | |
318 | USB_SS_PORT_LS_U0) == 1 && | |
319 | dum_hcd->rh_state != DUMMY_RH_SUSPENDED) | |
320 | dum_hcd->active = 1; | |
321 | } | |
322 | } else { | |
323 | if ((dum_hcd->port_status & USB_PORT_STAT_POWER) == 0) { | |
324 | dum_hcd->port_status = 0; | |
325 | } else if (!dum->pullup || dum->udc_suspended) { | |
326 | /* UDC suspend must cause a disconnect */ | |
327 | dum_hcd->port_status &= ~(USB_PORT_STAT_CONNECTION | | |
328 | USB_PORT_STAT_ENABLE | | |
329 | USB_PORT_STAT_LOW_SPEED | | |
330 | USB_PORT_STAT_HIGH_SPEED | | |
331 | USB_PORT_STAT_SUSPEND); | |
332 | if ((dum_hcd->old_status & | |
333 | USB_PORT_STAT_CONNECTION) != 0) | |
334 | dum_hcd->port_status |= | |
335 | (USB_PORT_STAT_C_CONNECTION << 16); | |
336 | } else { | |
337 | dum_hcd->port_status |= USB_PORT_STAT_CONNECTION; | |
338 | if ((dum_hcd->old_status & | |
339 | USB_PORT_STAT_CONNECTION) == 0) | |
340 | dum_hcd->port_status |= | |
341 | (USB_PORT_STAT_C_CONNECTION << 16); | |
342 | if ((dum_hcd->port_status & USB_PORT_STAT_ENABLE) == 0) | |
343 | dum_hcd->port_status &= ~USB_PORT_STAT_SUSPEND; | |
344 | else if ((dum_hcd->port_status & | |
345 | USB_PORT_STAT_SUSPEND) == 0 && | |
346 | dum_hcd->rh_state != DUMMY_RH_SUSPENDED) | |
347 | dum_hcd->active = 1; | |
348 | } | |
349 | } | |
350 | } | |
351 | ||
f1c39fad | 352 | /* caller must hold lock */ |
cdfcbd2c | 353 | static void set_link_state(struct dummy_hcd *dum_hcd) |
f1c39fad | 354 | { |
cdfcbd2c TB |
355 | struct dummy *dum = dum_hcd->dum; |
356 | ||
357 | dum_hcd->active = 0; | |
1cd8fd28 TB |
358 | if (dum->pullup) |
359 | if ((dummy_hcd_to_hcd(dum_hcd)->speed == HCD_USB3 && | |
360 | dum->gadget.speed != USB_SPEED_SUPER) || | |
361 | (dummy_hcd_to_hcd(dum_hcd)->speed != HCD_USB3 && | |
362 | dum->gadget.speed == USB_SPEED_SUPER)) | |
363 | return; | |
364 | ||
365 | set_link_state_by_speed(dum_hcd); | |
f1c39fad | 366 | |
cdfcbd2c TB |
367 | if ((dum_hcd->port_status & USB_PORT_STAT_ENABLE) == 0 || |
368 | dum_hcd->active) | |
369 | dum_hcd->resuming = 0; | |
f1c39fad | 370 | |
1cd8fd28 | 371 | /* if !connected or reset */ |
cdfcbd2c TB |
372 | if ((dum_hcd->port_status & USB_PORT_STAT_CONNECTION) == 0 || |
373 | (dum_hcd->port_status & USB_PORT_STAT_RESET) != 0) { | |
1cd8fd28 TB |
374 | /* |
375 | * We're connected and not reset (reset occurred now), | |
376 | * and driver attached - disconnect! | |
377 | */ | |
cdfcbd2c | 378 | if ((dum_hcd->old_status & USB_PORT_STAT_CONNECTION) != 0 && |
1cd8fd28 TB |
379 | (dum_hcd->old_status & USB_PORT_STAT_RESET) == 0 && |
380 | dum->driver) { | |
381 | stop_activity(dum); | |
382 | spin_unlock(&dum->lock); | |
383 | dum->driver->disconnect(&dum->gadget); | |
384 | spin_lock(&dum->lock); | |
f1c39fad | 385 | } |
cdfcbd2c TB |
386 | } else if (dum_hcd->active != dum_hcd->old_active) { |
387 | if (dum_hcd->old_active && dum->driver->suspend) { | |
1cd8fd28 TB |
388 | spin_unlock(&dum->lock); |
389 | dum->driver->suspend(&dum->gadget); | |
390 | spin_lock(&dum->lock); | |
391 | } else if (!dum_hcd->old_active && dum->driver->resume) { | |
392 | spin_unlock(&dum->lock); | |
393 | dum->driver->resume(&dum->gadget); | |
394 | spin_lock(&dum->lock); | |
f1c39fad AS |
395 | } |
396 | } | |
397 | ||
cdfcbd2c TB |
398 | dum_hcd->old_status = dum_hcd->port_status; |
399 | dum_hcd->old_active = dum_hcd->active; | |
f1c39fad AS |
400 | } |
401 | ||
402 | /*-------------------------------------------------------------------------*/ | |
403 | ||
1da177e4 LT |
404 | /* SLAVE/GADGET SIDE DRIVER |
405 | * | |
406 | * This only tracks gadget state. All the work is done when the host | |
407 | * side tries some (emulated) i/o operation. Real device controller | |
408 | * drivers would do real i/o using dma, fifos, irqs, timers, etc. | |
409 | */ | |
410 | ||
411 | #define is_enabled(dum) \ | |
412 | (dum->port_status & USB_PORT_STAT_ENABLE) | |
413 | ||
18f2cbaa SAS |
414 | static int dummy_enable(struct usb_ep *_ep, |
415 | const struct usb_endpoint_descriptor *desc) | |
1da177e4 LT |
416 | { |
417 | struct dummy *dum; | |
cdfcbd2c | 418 | struct dummy_hcd *dum_hcd; |
1da177e4 LT |
419 | struct dummy_ep *ep; |
420 | unsigned max; | |
421 | int retval; | |
422 | ||
18f2cbaa | 423 | ep = usb_ep_to_dummy_ep(_ep); |
1da177e4 LT |
424 | if (!_ep || !desc || ep->desc || _ep->name == ep0name |
425 | || desc->bDescriptorType != USB_DT_ENDPOINT) | |
426 | return -EINVAL; | |
18f2cbaa | 427 | dum = ep_to_dummy(ep); |
cdfcbd2c TB |
428 | if (!dum->driver) |
429 | return -ESHUTDOWN; | |
719e52cb SAS |
430 | |
431 | dum_hcd = gadget_to_dummy_hcd(&dum->gadget); | |
cdfcbd2c | 432 | if (!is_enabled(dum_hcd)) |
1da177e4 | 433 | return -ESHUTDOWN; |
cdfcbd2c TB |
434 | |
435 | /* | |
436 | * For HS/FS devices only bits 0..10 of the wMaxPacketSize represent the | |
437 | * maximum packet size. | |
1cd8fd28 | 438 | * For SS devices the wMaxPacketSize is limited by 1024. |
cdfcbd2c | 439 | */ |
29cc8897 | 440 | max = usb_endpoint_maxp(desc) & 0x7ff; |
1da177e4 LT |
441 | |
442 | /* drivers must not request bad settings, since lower levels | |
443 | * (hardware or its drivers) may not check. some endpoints | |
444 | * can't do iso, many have maxpacket limitations, etc. | |
445 | * | |
446 | * since this "hardware" driver is here to help debugging, we | |
447 | * have some extra sanity checks. (there could be more though, | |
448 | * especially for "ep9out" style fixed function ones.) | |
449 | */ | |
450 | retval = -EINVAL; | |
59f08e6d | 451 | switch (usb_endpoint_type(desc)) { |
1da177e4 | 452 | case USB_ENDPOINT_XFER_BULK: |
18f2cbaa SAS |
453 | if (strstr(ep->ep.name, "-iso") |
454 | || strstr(ep->ep.name, "-int")) { | |
1da177e4 LT |
455 | goto done; |
456 | } | |
457 | switch (dum->gadget.speed) { | |
1cd8fd28 TB |
458 | case USB_SPEED_SUPER: |
459 | if (max == 1024) | |
460 | break; | |
461 | goto done; | |
1da177e4 LT |
462 | case USB_SPEED_HIGH: |
463 | if (max == 512) | |
464 | break; | |
9063ff44 IL |
465 | goto done; |
466 | case USB_SPEED_FULL: | |
467 | if (max == 8 || max == 16 || max == 32 || max == 64) | |
1da177e4 LT |
468 | /* we'll fake any legal size */ |
469 | break; | |
9063ff44 IL |
470 | /* save a return statement */ |
471 | default: | |
472 | goto done; | |
1da177e4 LT |
473 | } |
474 | break; | |
475 | case USB_ENDPOINT_XFER_INT: | |
18f2cbaa | 476 | if (strstr(ep->ep.name, "-iso")) /* bulk is ok */ |
1da177e4 LT |
477 | goto done; |
478 | /* real hardware might not handle all packet sizes */ | |
479 | switch (dum->gadget.speed) { | |
1cd8fd28 | 480 | case USB_SPEED_SUPER: |
1da177e4 LT |
481 | case USB_SPEED_HIGH: |
482 | if (max <= 1024) | |
483 | break; | |
484 | /* save a return statement */ | |
485 | case USB_SPEED_FULL: | |
486 | if (max <= 64) | |
487 | break; | |
488 | /* save a return statement */ | |
489 | default: | |
490 | if (max <= 8) | |
491 | break; | |
492 | goto done; | |
493 | } | |
494 | break; | |
495 | case USB_ENDPOINT_XFER_ISOC: | |
18f2cbaa SAS |
496 | if (strstr(ep->ep.name, "-bulk") |
497 | || strstr(ep->ep.name, "-int")) | |
1da177e4 LT |
498 | goto done; |
499 | /* real hardware might not handle all packet sizes */ | |
500 | switch (dum->gadget.speed) { | |
1cd8fd28 | 501 | case USB_SPEED_SUPER: |
1da177e4 LT |
502 | case USB_SPEED_HIGH: |
503 | if (max <= 1024) | |
504 | break; | |
505 | /* save a return statement */ | |
506 | case USB_SPEED_FULL: | |
507 | if (max <= 1023) | |
508 | break; | |
509 | /* save a return statement */ | |
510 | default: | |
511 | goto done; | |
512 | } | |
513 | break; | |
514 | default: | |
515 | /* few chips support control except on ep0 */ | |
516 | goto done; | |
517 | } | |
518 | ||
519 | _ep->maxpacket = max; | |
a54c979f SAS |
520 | if (usb_ss_max_streams(_ep->comp_desc)) { |
521 | if (!usb_endpoint_xfer_bulk(desc)) { | |
522 | dev_err(udc_dev(dum), "Can't enable stream support on " | |
523 | "non-bulk ep %s\n", _ep->name); | |
524 | return -EINVAL; | |
525 | } | |
526 | ep->stream_en = 1; | |
527 | } | |
3cf0ad02 | 528 | ep->desc = desc; |
1da177e4 | 529 | |
a54c979f | 530 | dev_dbg(udc_dev(dum), "enabled %s (ep%d%s-%s) maxpacket %d stream %s\n", |
1da177e4 LT |
531 | _ep->name, |
532 | desc->bEndpointAddress & 0x0f, | |
533 | (desc->bEndpointAddress & USB_DIR_IN) ? "in" : "out", | |
534 | ({ char *val; | |
59f08e6d | 535 | switch (usb_endpoint_type(desc)) { |
7c884fe4 TB |
536 | case USB_ENDPOINT_XFER_BULK: |
537 | val = "bulk"; | |
538 | break; | |
539 | case USB_ENDPOINT_XFER_ISOC: | |
540 | val = "iso"; | |
541 | break; | |
542 | case USB_ENDPOINT_XFER_INT: | |
543 | val = "intr"; | |
544 | break; | |
545 | default: | |
546 | val = "ctrl"; | |
547 | break; | |
1da177e4 | 548 | }; val; }), |
a54c979f | 549 | max, ep->stream_en ? "enabled" : "disabled"); |
1da177e4 LT |
550 | |
551 | /* at this point real hardware should be NAKing transfers | |
552 | * to that endpoint, until a buffer is queued to it. | |
553 | */ | |
851a526d | 554 | ep->halted = ep->wedged = 0; |
1da177e4 LT |
555 | retval = 0; |
556 | done: | |
557 | return retval; | |
558 | } | |
559 | ||
18f2cbaa | 560 | static int dummy_disable(struct usb_ep *_ep) |
1da177e4 LT |
561 | { |
562 | struct dummy_ep *ep; | |
563 | struct dummy *dum; | |
564 | unsigned long flags; | |
565 | int retval; | |
566 | ||
18f2cbaa | 567 | ep = usb_ep_to_dummy_ep(_ep); |
1da177e4 LT |
568 | if (!_ep || !ep->desc || _ep->name == ep0name) |
569 | return -EINVAL; | |
18f2cbaa | 570 | dum = ep_to_dummy(ep); |
1da177e4 | 571 | |
18f2cbaa | 572 | spin_lock_irqsave(&dum->lock, flags); |
1da177e4 | 573 | ep->desc = NULL; |
a54c979f | 574 | ep->stream_en = 0; |
1da177e4 | 575 | retval = 0; |
18f2cbaa SAS |
576 | nuke(dum, ep); |
577 | spin_unlock_irqrestore(&dum->lock, flags); | |
1da177e4 | 578 | |
18f2cbaa | 579 | dev_dbg(udc_dev(dum), "disabled %s\n", _ep->name); |
1da177e4 LT |
580 | return retval; |
581 | } | |
582 | ||
18f2cbaa SAS |
583 | static struct usb_request *dummy_alloc_request(struct usb_ep *_ep, |
584 | gfp_t mem_flags) | |
1da177e4 LT |
585 | { |
586 | struct dummy_ep *ep; | |
587 | struct dummy_request *req; | |
588 | ||
589 | if (!_ep) | |
590 | return NULL; | |
18f2cbaa | 591 | ep = usb_ep_to_dummy_ep(_ep); |
1da177e4 | 592 | |
7039f422 | 593 | req = kzalloc(sizeof(*req), mem_flags); |
1da177e4 LT |
594 | if (!req) |
595 | return NULL; | |
18f2cbaa | 596 | INIT_LIST_HEAD(&req->queue); |
1da177e4 LT |
597 | return &req->req; |
598 | } | |
599 | ||
18f2cbaa | 600 | static void dummy_free_request(struct usb_ep *_ep, struct usb_request *_req) |
1da177e4 | 601 | { |
1da177e4 LT |
602 | struct dummy_request *req; |
603 | ||
f99987bb | 604 | if (!_ep || !_req) { |
72688dc9 | 605 | WARN_ON(1); |
1da177e4 | 606 | return; |
f99987bb | 607 | } |
1da177e4 | 608 | |
18f2cbaa SAS |
609 | req = usb_request_to_dummy_request(_req); |
610 | WARN_ON(!list_empty(&req->queue)); | |
611 | kfree(req); | |
1da177e4 LT |
612 | } |
613 | ||
18f2cbaa | 614 | static void fifo_complete(struct usb_ep *ep, struct usb_request *req) |
1da177e4 LT |
615 | { |
616 | } | |
617 | ||
18f2cbaa | 618 | static int dummy_queue(struct usb_ep *_ep, struct usb_request *_req, |
55016f10 | 619 | gfp_t mem_flags) |
1da177e4 LT |
620 | { |
621 | struct dummy_ep *ep; | |
622 | struct dummy_request *req; | |
623 | struct dummy *dum; | |
cdfcbd2c | 624 | struct dummy_hcd *dum_hcd; |
1da177e4 LT |
625 | unsigned long flags; |
626 | ||
18f2cbaa SAS |
627 | req = usb_request_to_dummy_request(_req); |
628 | if (!_req || !list_empty(&req->queue) || !_req->complete) | |
1da177e4 LT |
629 | return -EINVAL; |
630 | ||
18f2cbaa | 631 | ep = usb_ep_to_dummy_ep(_ep); |
1da177e4 LT |
632 | if (!_ep || (!ep->desc && _ep->name != ep0name)) |
633 | return -EINVAL; | |
634 | ||
18f2cbaa | 635 | dum = ep_to_dummy(ep); |
719e52cb | 636 | dum_hcd = gadget_to_dummy_hcd(&dum->gadget); |
cdfcbd2c | 637 | if (!dum->driver || !is_enabled(dum_hcd)) |
1da177e4 LT |
638 | return -ESHUTDOWN; |
639 | ||
640 | #if 0 | |
18f2cbaa | 641 | dev_dbg(udc_dev(dum), "ep %p queue req %p to %s, len %d buf %p\n", |
1da177e4 LT |
642 | ep, _req, _ep->name, _req->length, _req->buf); |
643 | #endif | |
1da177e4 LT |
644 | _req->status = -EINPROGRESS; |
645 | _req->actual = 0; | |
18f2cbaa | 646 | spin_lock_irqsave(&dum->lock, flags); |
1da177e4 LT |
647 | |
648 | /* implement an emulated single-request FIFO */ | |
649 | if (ep->desc && (ep->desc->bEndpointAddress & USB_DIR_IN) && | |
18f2cbaa SAS |
650 | list_empty(&dum->fifo_req.queue) && |
651 | list_empty(&ep->queue) && | |
1da177e4 LT |
652 | _req->length <= FIFO_SIZE) { |
653 | req = &dum->fifo_req; | |
654 | req->req = *_req; | |
655 | req->req.buf = dum->fifo_buf; | |
18f2cbaa | 656 | memcpy(dum->fifo_buf, _req->buf, _req->length); |
1da177e4 LT |
657 | req->req.context = dum; |
658 | req->req.complete = fifo_complete; | |
659 | ||
c728df70 | 660 | list_add_tail(&req->queue, &ep->queue); |
18f2cbaa | 661 | spin_unlock(&dum->lock); |
1da177e4 LT |
662 | _req->actual = _req->length; |
663 | _req->status = 0; | |
18f2cbaa SAS |
664 | _req->complete(_ep, _req); |
665 | spin_lock(&dum->lock); | |
c728df70 DB |
666 | } else |
667 | list_add_tail(&req->queue, &ep->queue); | |
18f2cbaa | 668 | spin_unlock_irqrestore(&dum->lock, flags); |
1da177e4 LT |
669 | |
670 | /* real hardware would likely enable transfers here, in case | |
671 | * it'd been left NAKing. | |
672 | */ | |
673 | return 0; | |
674 | } | |
675 | ||
18f2cbaa | 676 | static int dummy_dequeue(struct usb_ep *_ep, struct usb_request *_req) |
1da177e4 LT |
677 | { |
678 | struct dummy_ep *ep; | |
679 | struct dummy *dum; | |
680 | int retval = -EINVAL; | |
681 | unsigned long flags; | |
682 | struct dummy_request *req = NULL; | |
683 | ||
684 | if (!_ep || !_req) | |
685 | return retval; | |
18f2cbaa SAS |
686 | ep = usb_ep_to_dummy_ep(_ep); |
687 | dum = ep_to_dummy(ep); | |
1da177e4 LT |
688 | |
689 | if (!dum->driver) | |
690 | return -ESHUTDOWN; | |
691 | ||
18f2cbaa SAS |
692 | local_irq_save(flags); |
693 | spin_lock(&dum->lock); | |
694 | list_for_each_entry(req, &ep->queue, queue) { | |
1da177e4 | 695 | if (&req->req == _req) { |
18f2cbaa | 696 | list_del_init(&req->queue); |
1da177e4 LT |
697 | _req->status = -ECONNRESET; |
698 | retval = 0; | |
699 | break; | |
700 | } | |
701 | } | |
18f2cbaa | 702 | spin_unlock(&dum->lock); |
1da177e4 LT |
703 | |
704 | if (retval == 0) { | |
18f2cbaa | 705 | dev_dbg(udc_dev(dum), |
1da177e4 LT |
706 | "dequeued req %p from %s, len %d buf %p\n", |
707 | req, _ep->name, _req->length, _req->buf); | |
18f2cbaa | 708 | _req->complete(_ep, _req); |
1da177e4 | 709 | } |
18f2cbaa | 710 | local_irq_restore(flags); |
1da177e4 LT |
711 | return retval; |
712 | } | |
713 | ||
714 | static int | |
851a526d | 715 | dummy_set_halt_and_wedge(struct usb_ep *_ep, int value, int wedged) |
1da177e4 LT |
716 | { |
717 | struct dummy_ep *ep; | |
718 | struct dummy *dum; | |
719 | ||
720 | if (!_ep) | |
721 | return -EINVAL; | |
18f2cbaa SAS |
722 | ep = usb_ep_to_dummy_ep(_ep); |
723 | dum = ep_to_dummy(ep); | |
1da177e4 LT |
724 | if (!dum->driver) |
725 | return -ESHUTDOWN; | |
726 | if (!value) | |
851a526d | 727 | ep->halted = ep->wedged = 0; |
1da177e4 | 728 | else if (ep->desc && (ep->desc->bEndpointAddress & USB_DIR_IN) && |
18f2cbaa | 729 | !list_empty(&ep->queue)) |
1da177e4 | 730 | return -EAGAIN; |
851a526d | 731 | else { |
1da177e4 | 732 | ep->halted = 1; |
851a526d AS |
733 | if (wedged) |
734 | ep->wedged = 1; | |
735 | } | |
1da177e4 LT |
736 | /* FIXME clear emulated data toggle too */ |
737 | return 0; | |
738 | } | |
739 | ||
851a526d AS |
740 | static int |
741 | dummy_set_halt(struct usb_ep *_ep, int value) | |
742 | { | |
743 | return dummy_set_halt_and_wedge(_ep, value, 0); | |
744 | } | |
745 | ||
746 | static int dummy_set_wedge(struct usb_ep *_ep) | |
747 | { | |
748 | if (!_ep || _ep->name == ep0name) | |
749 | return -EINVAL; | |
750 | return dummy_set_halt_and_wedge(_ep, 1, 1); | |
751 | } | |
752 | ||
1da177e4 LT |
753 | static const struct usb_ep_ops dummy_ep_ops = { |
754 | .enable = dummy_enable, | |
755 | .disable = dummy_disable, | |
756 | ||
757 | .alloc_request = dummy_alloc_request, | |
758 | .free_request = dummy_free_request, | |
759 | ||
1da177e4 LT |
760 | .queue = dummy_queue, |
761 | .dequeue = dummy_dequeue, | |
762 | ||
763 | .set_halt = dummy_set_halt, | |
851a526d | 764 | .set_wedge = dummy_set_wedge, |
1da177e4 LT |
765 | }; |
766 | ||
767 | /*-------------------------------------------------------------------------*/ | |
768 | ||
769 | /* there are both host and device side versions of this call ... */ | |
18f2cbaa | 770 | static int dummy_g_get_frame(struct usb_gadget *_gadget) |
1da177e4 LT |
771 | { |
772 | struct timeval tv; | |
773 | ||
18f2cbaa | 774 | do_gettimeofday(&tv); |
1da177e4 LT |
775 | return tv.tv_usec / 1000; |
776 | } | |
777 | ||
18f2cbaa | 778 | static int dummy_wakeup(struct usb_gadget *_gadget) |
1da177e4 | 779 | { |
cdfcbd2c | 780 | struct dummy_hcd *dum_hcd; |
1da177e4 | 781 | |
cdfcbd2c TB |
782 | dum_hcd = gadget_to_dummy_hcd(_gadget); |
783 | if (!(dum_hcd->dum->devstatus & ((1 << USB_DEVICE_B_HNP_ENABLE) | |
5742b0c9 | 784 | | (1 << USB_DEVICE_REMOTE_WAKEUP)))) |
1da177e4 | 785 | return -EINVAL; |
cdfcbd2c | 786 | if ((dum_hcd->port_status & USB_PORT_STAT_CONNECTION) == 0) |
391eca9d | 787 | return -ENOLINK; |
cdfcbd2c TB |
788 | if ((dum_hcd->port_status & USB_PORT_STAT_SUSPEND) == 0 && |
789 | dum_hcd->rh_state != DUMMY_RH_SUSPENDED) | |
391eca9d AS |
790 | return -EIO; |
791 | ||
792 | /* FIXME: What if the root hub is suspended but the port isn't? */ | |
1da177e4 LT |
793 | |
794 | /* hub notices our request, issues downstream resume, etc */ | |
cdfcbd2c TB |
795 | dum_hcd->resuming = 1; |
796 | dum_hcd->re_timeout = jiffies + msecs_to_jiffies(20); | |
797 | mod_timer(&dummy_hcd_to_hcd(dum_hcd)->rh_timer, dum_hcd->re_timeout); | |
1da177e4 LT |
798 | return 0; |
799 | } | |
800 | ||
18f2cbaa | 801 | static int dummy_set_selfpowered(struct usb_gadget *_gadget, int value) |
1da177e4 LT |
802 | { |
803 | struct dummy *dum; | |
804 | ||
18f2cbaa | 805 | dum = gadget_to_dummy_hcd(_gadget)->dum; |
1da177e4 LT |
806 | if (value) |
807 | dum->devstatus |= (1 << USB_DEVICE_SELF_POWERED); | |
808 | else | |
809 | dum->devstatus &= ~(1 << USB_DEVICE_SELF_POWERED); | |
810 | return 0; | |
811 | } | |
812 | ||
d262127c | 813 | static void dummy_udc_update_ep0(struct dummy *dum) |
b5738413 | 814 | { |
c6884191 | 815 | if (dum->gadget.speed == USB_SPEED_SUPER) |
b5738413 | 816 | dum->ep[0].ep.maxpacket = 9; |
c6884191 | 817 | else |
b5738413 | 818 | dum->ep[0].ep.maxpacket = 64; |
b5738413 SAS |
819 | } |
820 | ||
18f2cbaa | 821 | static int dummy_pullup(struct usb_gadget *_gadget, int value) |
f1c39fad | 822 | { |
d8a14a85 | 823 | struct dummy_hcd *dum_hcd; |
f1c39fad AS |
824 | struct dummy *dum; |
825 | unsigned long flags; | |
826 | ||
b5738413 SAS |
827 | dum = gadget_dev_to_dummy(&_gadget->dev); |
828 | ||
829 | if (value && dum->driver) { | |
830 | if (mod_data.is_super_speed) | |
7177aed4 | 831 | dum->gadget.speed = dum->driver->max_speed; |
b5738413 SAS |
832 | else if (mod_data.is_high_speed) |
833 | dum->gadget.speed = min_t(u8, USB_SPEED_HIGH, | |
7177aed4 | 834 | dum->driver->max_speed); |
b5738413 SAS |
835 | else |
836 | dum->gadget.speed = USB_SPEED_FULL; | |
d262127c | 837 | dummy_udc_update_ep0(dum); |
b5738413 | 838 | |
7177aed4 | 839 | if (dum->gadget.speed < dum->driver->max_speed) |
b5738413 | 840 | dev_dbg(udc_dev(dum), "This device can perform faster" |
7177aed4 MN |
841 | " if you connect it to a %s port...\n", |
842 | usb_speed_string(dum->driver->max_speed)); | |
b5738413 | 843 | } |
d8a14a85 | 844 | dum_hcd = gadget_to_dummy_hcd(_gadget); |
d8a14a85 | 845 | |
18f2cbaa | 846 | spin_lock_irqsave(&dum->lock, flags); |
f1c39fad | 847 | dum->pullup = (value != 0); |
d8a14a85 | 848 | set_link_state(dum_hcd); |
18f2cbaa | 849 | spin_unlock_irqrestore(&dum->lock, flags); |
b5738413 | 850 | |
d8a14a85 | 851 | usb_hcd_poll_rh_status(dummy_hcd_to_hcd(dum_hcd)); |
f1c39fad AS |
852 | return 0; |
853 | } | |
854 | ||
aa074739 SAS |
855 | static int dummy_udc_start(struct usb_gadget *g, |
856 | struct usb_gadget_driver *driver); | |
857 | static int dummy_udc_stop(struct usb_gadget *g, | |
858 | struct usb_gadget_driver *driver); | |
0f91349b | 859 | |
1da177e4 LT |
860 | static const struct usb_gadget_ops dummy_ops = { |
861 | .get_frame = dummy_g_get_frame, | |
862 | .wakeup = dummy_wakeup, | |
863 | .set_selfpowered = dummy_set_selfpowered, | |
f1c39fad | 864 | .pullup = dummy_pullup, |
aa074739 SAS |
865 | .udc_start = dummy_udc_start, |
866 | .udc_stop = dummy_udc_stop, | |
1da177e4 LT |
867 | }; |
868 | ||
869 | /*-------------------------------------------------------------------------*/ | |
870 | ||
871 | /* "function" sysfs attribute */ | |
18f2cbaa SAS |
872 | static ssize_t show_function(struct device *dev, struct device_attribute *attr, |
873 | char *buf) | |
1da177e4 | 874 | { |
18f2cbaa | 875 | struct dummy *dum = gadget_dev_to_dummy(dev); |
1da177e4 LT |
876 | |
877 | if (!dum->driver || !dum->driver->function) | |
878 | return 0; | |
18f2cbaa | 879 | return scnprintf(buf, PAGE_SIZE, "%s\n", dum->driver->function); |
1da177e4 | 880 | } |
18f2cbaa | 881 | static DEVICE_ATTR(function, S_IRUGO, show_function, NULL); |
1da177e4 LT |
882 | |
883 | /*-------------------------------------------------------------------------*/ | |
884 | ||
885 | /* | |
886 | * Driver registration/unregistration. | |
887 | * | |
888 | * This is basically hardware-specific; there's usually only one real USB | |
889 | * device (not host) controller since that's how USB devices are intended | |
890 | * to work. So most implementations of these api calls will rely on the | |
891 | * fact that only one driver will ever bind to the hardware. But curious | |
892 | * hardware can be built with discrete components, so the gadget API doesn't | |
893 | * require that assumption. | |
894 | * | |
895 | * For this emulator, it might be convenient to create a usb slave device | |
896 | * for each driver that registers: just add to a big root hub. | |
897 | */ | |
898 | ||
aa074739 SAS |
899 | static int dummy_udc_start(struct usb_gadget *g, |
900 | struct usb_gadget_driver *driver) | |
1da177e4 | 901 | { |
aa074739 SAS |
902 | struct dummy_hcd *dum_hcd = gadget_to_dummy_hcd(g); |
903 | struct dummy *dum = dum_hcd->dum; | |
1da177e4 | 904 | |
7177aed4 | 905 | if (driver->max_speed == USB_SPEED_UNKNOWN) |
1da177e4 LT |
906 | return -EINVAL; |
907 | ||
908 | /* | |
909 | * SLAVE side init ... the layer above hardware, which | |
910 | * can't enumerate without help from the driver we're binding. | |
911 | */ | |
5742b0c9 | 912 | |
1da177e4 | 913 | dum->devstatus = 0; |
1da177e4 | 914 | |
1da177e4 | 915 | dum->driver = driver; |
d0d86075 | 916 | dum->gadget.dev.driver = &driver->driver; |
18f2cbaa | 917 | dev_dbg(udc_dev(dum), "binding gadget driver '%s'\n", |
1da177e4 | 918 | driver->driver.name); |
1da177e4 LT |
919 | return 0; |
920 | } | |
1da177e4 | 921 | |
aa074739 SAS |
922 | static int dummy_udc_stop(struct usb_gadget *g, |
923 | struct usb_gadget_driver *driver) | |
1da177e4 | 924 | { |
aa074739 SAS |
925 | struct dummy_hcd *dum_hcd = gadget_to_dummy_hcd(g); |
926 | struct dummy *dum = dum_hcd->dum; | |
1da177e4 | 927 | |
18f2cbaa | 928 | dev_dbg(udc_dev(dum), "unregister gadget driver '%s'\n", |
1da177e4 LT |
929 | driver->driver.name); |
930 | ||
d0d86075 | 931 | dum->gadget.dev.driver = NULL; |
1da177e4 | 932 | dum->driver = NULL; |
25427874 | 933 | |
1da177e4 LT |
934 | return 0; |
935 | } | |
1da177e4 LT |
936 | |
937 | #undef is_enabled | |
938 | ||
d9b76251 AS |
939 | /* The gadget structure is stored inside the hcd structure and will be |
940 | * released along with it. */ | |
18f2cbaa | 941 | static void dummy_gadget_release(struct device *dev) |
d9b76251 | 942 | { |
cdfcbd2c | 943 | return; |
d9b76251 AS |
944 | } |
945 | ||
0fb57599 SAS |
946 | static void init_dummy_udc_hw(struct dummy *dum) |
947 | { | |
948 | int i; | |
949 | ||
950 | INIT_LIST_HEAD(&dum->gadget.ep_list); | |
951 | for (i = 0; i < DUMMY_ENDPOINTS; i++) { | |
952 | struct dummy_ep *ep = &dum->ep[i]; | |
953 | ||
954 | if (!ep_name[i]) | |
955 | break; | |
956 | ep->ep.name = ep_name[i]; | |
957 | ep->ep.ops = &dummy_ep_ops; | |
958 | list_add_tail(&ep->ep.ep_list, &dum->gadget.ep_list); | |
959 | ep->halted = ep->wedged = ep->already_seen = | |
960 | ep->setup_stage = 0; | |
961 | ep->ep.maxpacket = ~0; | |
c6884191 | 962 | ep->ep.max_streams = 16; |
0fb57599 SAS |
963 | ep->last_io = jiffies; |
964 | ep->gadget = &dum->gadget; | |
965 | ep->desc = NULL; | |
966 | INIT_LIST_HEAD(&ep->queue); | |
967 | } | |
968 | ||
969 | dum->gadget.ep0 = &dum->ep[0].ep; | |
970 | list_del_init(&dum->ep[0].ep.ep_list); | |
971 | INIT_LIST_HEAD(&dum->fifo_req.queue); | |
f8744d40 SAS |
972 | |
973 | #ifdef CONFIG_USB_OTG | |
974 | dum->gadget.is_otg = 1; | |
975 | #endif | |
0fb57599 SAS |
976 | } |
977 | ||
18f2cbaa | 978 | static int dummy_udc_probe(struct platform_device *pdev) |
d9b76251 | 979 | { |
cdfcbd2c | 980 | struct dummy *dum = &the_controller; |
d9b76251 AS |
981 | int rc; |
982 | ||
983 | dum->gadget.name = gadget_name; | |
984 | dum->gadget.ops = &dummy_ops; | |
d327ab5b | 985 | dum->gadget.max_speed = USB_SPEED_SUPER; |
d9b76251 | 986 | |
0031a06e | 987 | dev_set_name(&dum->gadget.dev, "gadget"); |
8364d6b0 | 988 | dum->gadget.dev.parent = &pdev->dev; |
d9b76251 | 989 | dum->gadget.dev.release = dummy_gadget_release; |
18f2cbaa | 990 | rc = device_register(&dum->gadget.dev); |
75d87cdf RR |
991 | if (rc < 0) { |
992 | put_device(&dum->gadget.dev); | |
d9b76251 | 993 | return rc; |
75d87cdf | 994 | } |
d9b76251 | 995 | |
0fb57599 SAS |
996 | init_dummy_udc_hw(dum); |
997 | ||
0f91349b SAS |
998 | rc = usb_add_gadget_udc(&pdev->dev, &dum->gadget); |
999 | if (rc < 0) | |
1000 | goto err_udc; | |
1001 | ||
18f2cbaa | 1002 | rc = device_create_file(&dum->gadget.dev, &dev_attr_function); |
efd54a36 | 1003 | if (rc < 0) |
0f91349b SAS |
1004 | goto err_dev; |
1005 | platform_set_drvdata(pdev, dum); | |
1006 | return rc; | |
1007 | ||
1008 | err_dev: | |
1009 | usb_del_gadget_udc(&dum->gadget); | |
1010 | err_udc: | |
1011 | device_unregister(&dum->gadget.dev); | |
d9b76251 AS |
1012 | return rc; |
1013 | } | |
1014 | ||
18f2cbaa | 1015 | static int dummy_udc_remove(struct platform_device *pdev) |
d9b76251 | 1016 | { |
18f2cbaa | 1017 | struct dummy *dum = platform_get_drvdata(pdev); |
d9b76251 | 1018 | |
0f91349b | 1019 | usb_del_gadget_udc(&dum->gadget); |
18f2cbaa SAS |
1020 | platform_set_drvdata(pdev, NULL); |
1021 | device_remove_file(&dum->gadget.dev, &dev_attr_function); | |
1022 | device_unregister(&dum->gadget.dev); | |
d9b76251 AS |
1023 | return 0; |
1024 | } | |
1025 | ||
fc0b721f SAS |
1026 | static void dummy_udc_pm(struct dummy *dum, struct dummy_hcd *dum_hcd, |
1027 | int suspend) | |
391eca9d | 1028 | { |
fc0b721f SAS |
1029 | spin_lock_irq(&dum->lock); |
1030 | dum->udc_suspended = suspend; | |
d8a14a85 | 1031 | set_link_state(dum_hcd); |
fc0b721f SAS |
1032 | spin_unlock_irq(&dum->lock); |
1033 | } | |
1034 | ||
1035 | static int dummy_udc_suspend(struct platform_device *pdev, pm_message_t state) | |
1036 | { | |
1037 | struct dummy *dum = platform_get_drvdata(pdev); | |
1038 | struct dummy_hcd *dum_hcd = gadget_to_dummy_hcd(&dum->gadget); | |
391eca9d | 1039 | |
fc0b721f SAS |
1040 | dev_dbg(&pdev->dev, "%s\n", __func__); |
1041 | dummy_udc_pm(dum, dum_hcd, 1); | |
d8a14a85 | 1042 | usb_hcd_poll_rh_status(dummy_hcd_to_hcd(dum_hcd)); |
391eca9d AS |
1043 | return 0; |
1044 | } | |
1045 | ||
fc0b721f | 1046 | static int dummy_udc_resume(struct platform_device *pdev) |
391eca9d | 1047 | { |
fc0b721f SAS |
1048 | struct dummy *dum = platform_get_drvdata(pdev); |
1049 | struct dummy_hcd *dum_hcd = gadget_to_dummy_hcd(&dum->gadget); | |
391eca9d | 1050 | |
fc0b721f SAS |
1051 | dev_dbg(&pdev->dev, "%s\n", __func__); |
1052 | dummy_udc_pm(dum, dum_hcd, 0); | |
d8a14a85 | 1053 | usb_hcd_poll_rh_status(dummy_hcd_to_hcd(dum_hcd)); |
391eca9d AS |
1054 | return 0; |
1055 | } | |
1056 | ||
3ae5eaec | 1057 | static struct platform_driver dummy_udc_driver = { |
d9b76251 AS |
1058 | .probe = dummy_udc_probe, |
1059 | .remove = dummy_udc_remove, | |
391eca9d AS |
1060 | .suspend = dummy_udc_suspend, |
1061 | .resume = dummy_udc_resume, | |
3ae5eaec RK |
1062 | .driver = { |
1063 | .name = (char *) gadget_name, | |
1064 | .owner = THIS_MODULE, | |
1065 | }, | |
d9b76251 AS |
1066 | }; |
1067 | ||
1da177e4 LT |
1068 | /*-------------------------------------------------------------------------*/ |
1069 | ||
a54c979f SAS |
1070 | static unsigned int dummy_get_ep_idx(const struct usb_endpoint_descriptor *desc) |
1071 | { | |
1072 | unsigned int index; | |
1073 | ||
1074 | index = usb_endpoint_num(desc) << 1; | |
1075 | if (usb_endpoint_dir_in(desc)) | |
1076 | index |= 1; | |
1077 | return index; | |
1078 | } | |
1079 | ||
1da177e4 LT |
1080 | /* MASTER/HOST SIDE DRIVER |
1081 | * | |
1082 | * this uses the hcd framework to hook up to host side drivers. | |
1083 | * its root hub will only have one device, otherwise it acts like | |
1084 | * a normal host controller. | |
1085 | * | |
1086 | * when urbs are queued, they're just stuck on a list that we | |
1087 | * scan in a timer callback. that callback connects writes from | |
1088 | * the host with reads from the device, and so on, based on the | |
1089 | * usb 2.0 rules. | |
1090 | */ | |
1091 | ||
a54c979f SAS |
1092 | static int dummy_ep_stream_en(struct dummy_hcd *dum_hcd, struct urb *urb) |
1093 | { | |
1094 | const struct usb_endpoint_descriptor *desc = &urb->ep->desc; | |
1095 | u32 index; | |
1096 | ||
1097 | if (!usb_endpoint_xfer_bulk(desc)) | |
1098 | return 0; | |
1099 | ||
1100 | index = dummy_get_ep_idx(desc); | |
1101 | return (1 << index) & dum_hcd->stream_en_ep; | |
1102 | } | |
1103 | ||
1104 | /* | |
1105 | * The max stream number is saved as a nibble so for the 30 possible endpoints | |
1106 | * we only 15 bytes of memory. Therefore we are limited to max 16 streams (0 | |
1107 | * means we use only 1 stream). The maximum according to the spec is 16bit so | |
1108 | * if the 16 stream limit is about to go, the array size should be incremented | |
1109 | * to 30 elements of type u16. | |
1110 | */ | |
1111 | static int get_max_streams_for_pipe(struct dummy_hcd *dum_hcd, | |
1112 | unsigned int pipe) | |
1113 | { | |
1114 | int max_streams; | |
1115 | ||
1116 | max_streams = dum_hcd->num_stream[usb_pipeendpoint(pipe)]; | |
1117 | if (usb_pipeout(pipe)) | |
1118 | max_streams >>= 4; | |
1119 | else | |
1120 | max_streams &= 0xf; | |
1121 | max_streams++; | |
1122 | return max_streams; | |
1123 | } | |
1124 | ||
1125 | static void set_max_streams_for_pipe(struct dummy_hcd *dum_hcd, | |
1126 | unsigned int pipe, unsigned int streams) | |
1127 | { | |
1128 | int max_streams; | |
1129 | ||
1130 | streams--; | |
1131 | max_streams = dum_hcd->num_stream[usb_pipeendpoint(pipe)]; | |
1132 | if (usb_pipeout(pipe)) { | |
1133 | streams <<= 4; | |
1134 | max_streams &= 0xf; | |
1135 | } else { | |
1136 | max_streams &= 0xf0; | |
1137 | } | |
1138 | max_streams |= streams; | |
1139 | dum_hcd->num_stream[usb_pipeendpoint(pipe)] = max_streams; | |
1140 | } | |
1141 | ||
1142 | static int dummy_validate_stream(struct dummy_hcd *dum_hcd, struct urb *urb) | |
1143 | { | |
1144 | unsigned int max_streams; | |
1145 | int enabled; | |
1146 | ||
1147 | enabled = dummy_ep_stream_en(dum_hcd, urb); | |
1148 | if (!urb->stream_id) { | |
1149 | if (enabled) | |
1150 | return -EINVAL; | |
1151 | return 0; | |
1152 | } | |
1153 | if (!enabled) | |
1154 | return -EINVAL; | |
1155 | ||
1156 | max_streams = get_max_streams_for_pipe(dum_hcd, | |
1157 | usb_pipeendpoint(urb->pipe)); | |
1158 | if (urb->stream_id > max_streams) { | |
1159 | dev_err(dummy_dev(dum_hcd), "Stream id %d is out of range.\n", | |
1160 | urb->stream_id); | |
1161 | BUG(); | |
1162 | return -EINVAL; | |
1163 | } | |
1164 | return 0; | |
1165 | } | |
1166 | ||
18f2cbaa | 1167 | static int dummy_urb_enqueue( |
1da177e4 | 1168 | struct usb_hcd *hcd, |
1da177e4 | 1169 | struct urb *urb, |
55016f10 | 1170 | gfp_t mem_flags |
1da177e4 | 1171 | ) { |
cdfcbd2c | 1172 | struct dummy_hcd *dum_hcd; |
1da177e4 LT |
1173 | struct urbp *urbp; |
1174 | unsigned long flags; | |
e9df41c5 | 1175 | int rc; |
1da177e4 | 1176 | |
18f2cbaa | 1177 | urbp = kmalloc(sizeof *urbp, mem_flags); |
1da177e4 LT |
1178 | if (!urbp) |
1179 | return -ENOMEM; | |
1180 | urbp->urb = urb; | |
14fce33a | 1181 | urbp->miter_started = 0; |
1da177e4 | 1182 | |
cdfcbd2c TB |
1183 | dum_hcd = hcd_to_dummy_hcd(hcd); |
1184 | spin_lock_irqsave(&dum_hcd->dum->lock, flags); | |
a54c979f SAS |
1185 | |
1186 | rc = dummy_validate_stream(dum_hcd, urb); | |
1187 | if (rc) { | |
1188 | kfree(urbp); | |
1189 | goto done; | |
1190 | } | |
1191 | ||
e9df41c5 AS |
1192 | rc = usb_hcd_link_urb_to_ep(hcd, urb); |
1193 | if (rc) { | |
1194 | kfree(urbp); | |
1195 | goto done; | |
1196 | } | |
1da177e4 | 1197 | |
cdfcbd2c TB |
1198 | if (!dum_hcd->udev) { |
1199 | dum_hcd->udev = urb->dev; | |
1200 | usb_get_dev(dum_hcd->udev); | |
1201 | } else if (unlikely(dum_hcd->udev != urb->dev)) | |
1202 | dev_err(dummy_dev(dum_hcd), "usb_device address has changed!\n"); | |
1da177e4 | 1203 | |
cdfcbd2c | 1204 | list_add_tail(&urbp->urbp_list, &dum_hcd->urbp_list); |
1da177e4 | 1205 | urb->hcpriv = urbp; |
18f2cbaa | 1206 | if (usb_pipetype(urb->pipe) == PIPE_CONTROL) |
1da177e4 LT |
1207 | urb->error_count = 1; /* mark as a new urb */ |
1208 | ||
1209 | /* kick the scheduler, it'll do the rest */ | |
cdfcbd2c TB |
1210 | if (!timer_pending(&dum_hcd->timer)) |
1211 | mod_timer(&dum_hcd->timer, jiffies + 1); | |
1da177e4 | 1212 | |
e9df41c5 | 1213 | done: |
cdfcbd2c | 1214 | spin_unlock_irqrestore(&dum_hcd->dum->lock, flags); |
e9df41c5 | 1215 | return rc; |
1da177e4 LT |
1216 | } |
1217 | ||
e9df41c5 | 1218 | static int dummy_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status) |
1da177e4 | 1219 | { |
cdfcbd2c | 1220 | struct dummy_hcd *dum_hcd; |
391eca9d | 1221 | unsigned long flags; |
e9df41c5 | 1222 | int rc; |
391eca9d AS |
1223 | |
1224 | /* giveback happens automatically in timer callback, | |
1225 | * so make sure the callback happens */ | |
cdfcbd2c TB |
1226 | dum_hcd = hcd_to_dummy_hcd(hcd); |
1227 | spin_lock_irqsave(&dum_hcd->dum->lock, flags); | |
e9df41c5 AS |
1228 | |
1229 | rc = usb_hcd_check_unlink_urb(hcd, urb, status); | |
cdfcbd2c TB |
1230 | if (!rc && dum_hcd->rh_state != DUMMY_RH_RUNNING && |
1231 | !list_empty(&dum_hcd->urbp_list)) | |
1232 | mod_timer(&dum_hcd->timer, jiffies); | |
e9df41c5 | 1233 | |
cdfcbd2c | 1234 | spin_unlock_irqrestore(&dum_hcd->dum->lock, flags); |
e9df41c5 | 1235 | return rc; |
1da177e4 LT |
1236 | } |
1237 | ||
a04ce20d SAS |
1238 | static int dummy_perform_transfer(struct urb *urb, struct dummy_request *req, |
1239 | u32 len) | |
1240 | { | |
1241 | void *ubuf, *rbuf; | |
14fce33a | 1242 | struct urbp *urbp = urb->hcpriv; |
a04ce20d | 1243 | int to_host; |
14fce33a SAS |
1244 | struct sg_mapping_iter *miter = &urbp->miter; |
1245 | u32 trans = 0; | |
1246 | u32 this_sg; | |
1247 | bool next_sg; | |
a04ce20d SAS |
1248 | |
1249 | to_host = usb_pipein(urb->pipe); | |
1250 | rbuf = req->req.buf + req->req.actual; | |
a04ce20d | 1251 | |
14fce33a SAS |
1252 | if (!urb->num_sgs) { |
1253 | ubuf = urb->transfer_buffer + urb->actual_length; | |
1254 | if (to_host) | |
1255 | memcpy(ubuf, rbuf, len); | |
1256 | else | |
1257 | memcpy(rbuf, ubuf, len); | |
1258 | return len; | |
1259 | } | |
1260 | ||
1261 | if (!urbp->miter_started) { | |
1262 | u32 flags = SG_MITER_ATOMIC; | |
1263 | ||
1264 | if (to_host) | |
1265 | flags |= SG_MITER_TO_SG; | |
1266 | else | |
1267 | flags |= SG_MITER_FROM_SG; | |
1268 | ||
1269 | sg_miter_start(miter, urb->sg, urb->num_sgs, flags); | |
1270 | urbp->miter_started = 1; | |
1271 | } | |
1272 | next_sg = sg_miter_next(miter); | |
1273 | if (next_sg == false) { | |
1274 | WARN_ON_ONCE(1); | |
1275 | return -EINVAL; | |
1276 | } | |
1277 | do { | |
1278 | ubuf = miter->addr; | |
1279 | this_sg = min_t(u32, len, miter->length); | |
1280 | miter->consumed = this_sg; | |
1281 | trans += this_sg; | |
1282 | ||
1283 | if (to_host) | |
1284 | memcpy(ubuf, rbuf, this_sg); | |
1285 | else | |
1286 | memcpy(rbuf, ubuf, this_sg); | |
1287 | len -= this_sg; | |
1288 | ||
1289 | if (!len) | |
1290 | break; | |
1291 | next_sg = sg_miter_next(miter); | |
1292 | if (next_sg == false) { | |
1293 | WARN_ON_ONCE(1); | |
1294 | return -EINVAL; | |
1295 | } | |
1296 | ||
1297 | rbuf += this_sg; | |
1298 | } while (1); | |
1299 | ||
1300 | sg_miter_stop(miter); | |
1301 | return trans; | |
a04ce20d SAS |
1302 | } |
1303 | ||
1da177e4 | 1304 | /* transfer up to a frame's worth; caller must own lock */ |
a54c979f SAS |
1305 | static int transfer(struct dummy_hcd *dum_hcd, struct urb *urb, |
1306 | struct dummy_ep *ep, int limit, int *status) | |
1da177e4 | 1307 | { |
a54c979f | 1308 | struct dummy *dum = dum_hcd->dum; |
1da177e4 LT |
1309 | struct dummy_request *req; |
1310 | ||
1311 | top: | |
1312 | /* if there's no request queued, the device is NAKing; return */ | |
18f2cbaa | 1313 | list_for_each_entry(req, &ep->queue, queue) { |
1da177e4 LT |
1314 | unsigned host_len, dev_len, len; |
1315 | int is_short, to_host; | |
1316 | int rescan = 0; | |
1317 | ||
a54c979f SAS |
1318 | if (dummy_ep_stream_en(dum_hcd, urb)) { |
1319 | if ((urb->stream_id != req->req.stream_id)) | |
1320 | continue; | |
1321 | } | |
1322 | ||
1da177e4 LT |
1323 | /* 1..N packets of ep->ep.maxpacket each ... the last one |
1324 | * may be short (including zero length). | |
1325 | * | |
1326 | * writer can send a zlp explicitly (length 0) or implicitly | |
1327 | * (length mod maxpacket zero, and 'zero' flag); they always | |
1328 | * terminate reads. | |
1329 | */ | |
1330 | host_len = urb->transfer_buffer_length - urb->actual_length; | |
1331 | dev_len = req->req.length - req->req.actual; | |
18f2cbaa | 1332 | len = min(host_len, dev_len); |
1da177e4 LT |
1333 | |
1334 | /* FIXME update emulated data toggle too */ | |
1335 | ||
18f2cbaa SAS |
1336 | to_host = usb_pipein(urb->pipe); |
1337 | if (unlikely(len == 0)) | |
1da177e4 LT |
1338 | is_short = 1; |
1339 | else { | |
1da177e4 LT |
1340 | /* not enough bandwidth left? */ |
1341 | if (limit < ep->ep.maxpacket && limit < len) | |
1342 | break; | |
18f2cbaa | 1343 | len = min_t(unsigned, len, limit); |
1da177e4 LT |
1344 | if (len == 0) |
1345 | break; | |
1346 | ||
1347 | /* use an extra pass for the final short packet */ | |
1348 | if (len > ep->ep.maxpacket) { | |
1349 | rescan = 1; | |
1350 | len -= (len % ep->ep.maxpacket); | |
1351 | } | |
1352 | is_short = (len % ep->ep.maxpacket) != 0; | |
1353 | ||
a04ce20d SAS |
1354 | len = dummy_perform_transfer(urb, req, len); |
1355 | ||
1da177e4 | 1356 | ep->last_io = jiffies; |
b1443ac0 | 1357 | if ((int)len < 0) { |
14fce33a SAS |
1358 | req->req.status = len; |
1359 | } else { | |
1360 | limit -= len; | |
1361 | urb->actual_length += len; | |
1362 | req->req.actual += len; | |
1363 | } | |
1da177e4 LT |
1364 | } |
1365 | ||
1366 | /* short packets terminate, maybe with overflow/underflow. | |
1367 | * it's only really an error to write too much. | |
1368 | * | |
1369 | * partially filling a buffer optionally blocks queue advances | |
1370 | * (so completion handlers can clean up the queue) but we don't | |
b0d9efba | 1371 | * need to emulate such data-in-flight. |
1da177e4 LT |
1372 | */ |
1373 | if (is_short) { | |
1374 | if (host_len == dev_len) { | |
1375 | req->req.status = 0; | |
4d2f110c | 1376 | *status = 0; |
1da177e4 LT |
1377 | } else if (to_host) { |
1378 | req->req.status = 0; | |
1379 | if (dev_len > host_len) | |
4d2f110c | 1380 | *status = -EOVERFLOW; |
1da177e4 | 1381 | else |
4d2f110c | 1382 | *status = 0; |
1da177e4 | 1383 | } else if (!to_host) { |
4d2f110c | 1384 | *status = 0; |
1da177e4 LT |
1385 | if (host_len > dev_len) |
1386 | req->req.status = -EOVERFLOW; | |
1387 | else | |
1388 | req->req.status = 0; | |
1389 | } | |
1390 | ||
1391 | /* many requests terminate without a short packet */ | |
1392 | } else { | |
1393 | if (req->req.length == req->req.actual | |
1394 | && !req->req.zero) | |
1395 | req->req.status = 0; | |
1396 | if (urb->transfer_buffer_length == urb->actual_length | |
1397 | && !(urb->transfer_flags | |
4d2f110c AS |
1398 | & URB_ZERO_PACKET)) |
1399 | *status = 0; | |
1da177e4 LT |
1400 | } |
1401 | ||
1402 | /* device side completion --> continuable */ | |
1403 | if (req->req.status != -EINPROGRESS) { | |
18f2cbaa | 1404 | list_del_init(&req->queue); |
1da177e4 | 1405 | |
18f2cbaa SAS |
1406 | spin_unlock(&dum->lock); |
1407 | req->req.complete(&ep->ep, &req->req); | |
1408 | spin_lock(&dum->lock); | |
1da177e4 LT |
1409 | |
1410 | /* requests might have been unlinked... */ | |
1411 | rescan = 1; | |
1412 | } | |
1413 | ||
1414 | /* host side completion --> terminate */ | |
4d2f110c | 1415 | if (*status != -EINPROGRESS) |
1da177e4 LT |
1416 | break; |
1417 | ||
1418 | /* rescan to continue with any other queued i/o */ | |
1419 | if (rescan) | |
1420 | goto top; | |
1421 | } | |
1422 | return limit; | |
1423 | } | |
1424 | ||
18f2cbaa | 1425 | static int periodic_bytes(struct dummy *dum, struct dummy_ep *ep) |
1da177e4 LT |
1426 | { |
1427 | int limit = ep->ep.maxpacket; | |
1428 | ||
1429 | if (dum->gadget.speed == USB_SPEED_HIGH) { | |
1430 | int tmp; | |
1431 | ||
1432 | /* high bandwidth mode */ | |
29cc8897 | 1433 | tmp = usb_endpoint_maxp(ep->desc); |
1da177e4 LT |
1434 | tmp = (tmp >> 11) & 0x03; |
1435 | tmp *= 8 /* applies to entire frame */; | |
1436 | limit += limit * tmp; | |
1437 | } | |
1cd8fd28 | 1438 | if (dum->gadget.speed == USB_SPEED_SUPER) { |
59f08e6d | 1439 | switch (usb_endpoint_type(ep->desc)) { |
1cd8fd28 TB |
1440 | case USB_ENDPOINT_XFER_ISOC: |
1441 | /* Sec. 4.4.8.2 USB3.0 Spec */ | |
1442 | limit = 3 * 16 * 1024 * 8; | |
1443 | break; | |
1444 | case USB_ENDPOINT_XFER_INT: | |
1445 | /* Sec. 4.4.7.2 USB3.0 Spec */ | |
1446 | limit = 3 * 1024 * 8; | |
1447 | break; | |
1448 | case USB_ENDPOINT_XFER_BULK: | |
1449 | default: | |
1450 | break; | |
1451 | } | |
1452 | } | |
1da177e4 LT |
1453 | return limit; |
1454 | } | |
1455 | ||
cdfcbd2c | 1456 | #define is_active(dum_hcd) ((dum_hcd->port_status & \ |
1da177e4 LT |
1457 | (USB_PORT_STAT_CONNECTION | USB_PORT_STAT_ENABLE | \ |
1458 | USB_PORT_STAT_SUSPEND)) \ | |
1459 | == (USB_PORT_STAT_CONNECTION | USB_PORT_STAT_ENABLE)) | |
1460 | ||
18f2cbaa | 1461 | static struct dummy_ep *find_endpoint(struct dummy *dum, u8 address) |
1da177e4 LT |
1462 | { |
1463 | int i; | |
1464 | ||
1cd8fd28 TB |
1465 | if (!is_active((dum->gadget.speed == USB_SPEED_SUPER ? |
1466 | dum->ss_hcd : dum->hs_hcd))) | |
1da177e4 LT |
1467 | return NULL; |
1468 | if ((address & ~USB_DIR_IN) == 0) | |
18f2cbaa | 1469 | return &dum->ep[0]; |
1da177e4 | 1470 | for (i = 1; i < DUMMY_ENDPOINTS; i++) { |
18f2cbaa | 1471 | struct dummy_ep *ep = &dum->ep[i]; |
1da177e4 LT |
1472 | |
1473 | if (!ep->desc) | |
1474 | continue; | |
1475 | if (ep->desc->bEndpointAddress == address) | |
1476 | return ep; | |
1477 | } | |
1478 | return NULL; | |
1479 | } | |
1480 | ||
1481 | #undef is_active | |
1482 | ||
1483 | #define Dev_Request (USB_TYPE_STANDARD | USB_RECIP_DEVICE) | |
1484 | #define Dev_InRequest (Dev_Request | USB_DIR_IN) | |
1485 | #define Intf_Request (USB_TYPE_STANDARD | USB_RECIP_INTERFACE) | |
1486 | #define Intf_InRequest (Intf_Request | USB_DIR_IN) | |
1487 | #define Ep_Request (USB_TYPE_STANDARD | USB_RECIP_ENDPOINT) | |
1488 | #define Ep_InRequest (Ep_Request | USB_DIR_IN) | |
1489 | ||
8be8a9d3 TB |
1490 | |
1491 | /** | |
1492 | * handle_control_request() - handles all control transfers | |
1493 | * @dum: pointer to dummy (the_controller) | |
1494 | * @urb: the urb request to handle | |
1495 | * @setup: pointer to the setup data for a USB device control | |
1496 | * request | |
1497 | * @status: pointer to request handling status | |
1498 | * | |
1499 | * Return 0 - if the request was handled | |
1500 | * 1 - if the request wasn't handles | |
1501 | * error code on error | |
1502 | */ | |
cdfcbd2c | 1503 | static int handle_control_request(struct dummy_hcd *dum_hcd, struct urb *urb, |
8be8a9d3 TB |
1504 | struct usb_ctrlrequest *setup, |
1505 | int *status) | |
1506 | { | |
1507 | struct dummy_ep *ep2; | |
cdfcbd2c | 1508 | struct dummy *dum = dum_hcd->dum; |
8be8a9d3 TB |
1509 | int ret_val = 1; |
1510 | unsigned w_index; | |
1511 | unsigned w_value; | |
1512 | ||
1513 | w_index = le16_to_cpu(setup->wIndex); | |
1514 | w_value = le16_to_cpu(setup->wValue); | |
1515 | switch (setup->bRequest) { | |
1516 | case USB_REQ_SET_ADDRESS: | |
1517 | if (setup->bRequestType != Dev_Request) | |
1518 | break; | |
1519 | dum->address = w_value; | |
1520 | *status = 0; | |
1521 | dev_dbg(udc_dev(dum), "set_address = %d\n", | |
1522 | w_value); | |
1523 | ret_val = 0; | |
1524 | break; | |
1525 | case USB_REQ_SET_FEATURE: | |
1526 | if (setup->bRequestType == Dev_Request) { | |
1527 | ret_val = 0; | |
1528 | switch (w_value) { | |
1529 | case USB_DEVICE_REMOTE_WAKEUP: | |
1530 | break; | |
1531 | case USB_DEVICE_B_HNP_ENABLE: | |
1532 | dum->gadget.b_hnp_enable = 1; | |
1533 | break; | |
1534 | case USB_DEVICE_A_HNP_SUPPORT: | |
1535 | dum->gadget.a_hnp_support = 1; | |
1536 | break; | |
1537 | case USB_DEVICE_A_ALT_HNP_SUPPORT: | |
1538 | dum->gadget.a_alt_hnp_support = 1; | |
1539 | break; | |
1cd8fd28 TB |
1540 | case USB_DEVICE_U1_ENABLE: |
1541 | if (dummy_hcd_to_hcd(dum_hcd)->speed == | |
1542 | HCD_USB3) | |
1543 | w_value = USB_DEV_STAT_U1_ENABLED; | |
1544 | else | |
1545 | ret_val = -EOPNOTSUPP; | |
1546 | break; | |
1547 | case USB_DEVICE_U2_ENABLE: | |
1548 | if (dummy_hcd_to_hcd(dum_hcd)->speed == | |
1549 | HCD_USB3) | |
1550 | w_value = USB_DEV_STAT_U2_ENABLED; | |
1551 | else | |
1552 | ret_val = -EOPNOTSUPP; | |
1553 | break; | |
1554 | case USB_DEVICE_LTM_ENABLE: | |
1555 | if (dummy_hcd_to_hcd(dum_hcd)->speed == | |
1556 | HCD_USB3) | |
1557 | w_value = USB_DEV_STAT_LTM_ENABLED; | |
1558 | else | |
1559 | ret_val = -EOPNOTSUPP; | |
1560 | break; | |
8be8a9d3 TB |
1561 | default: |
1562 | ret_val = -EOPNOTSUPP; | |
1563 | } | |
1564 | if (ret_val == 0) { | |
1565 | dum->devstatus |= (1 << w_value); | |
1566 | *status = 0; | |
1567 | } | |
1568 | } else if (setup->bRequestType == Ep_Request) { | |
1569 | /* endpoint halt */ | |
1570 | ep2 = find_endpoint(dum, w_index); | |
1571 | if (!ep2 || ep2->ep.name == ep0name) { | |
1572 | ret_val = -EOPNOTSUPP; | |
1573 | break; | |
1574 | } | |
1575 | ep2->halted = 1; | |
1576 | ret_val = 0; | |
1577 | *status = 0; | |
1578 | } | |
1579 | break; | |
1580 | case USB_REQ_CLEAR_FEATURE: | |
1581 | if (setup->bRequestType == Dev_Request) { | |
1582 | ret_val = 0; | |
1583 | switch (w_value) { | |
1584 | case USB_DEVICE_REMOTE_WAKEUP: | |
1585 | w_value = USB_DEVICE_REMOTE_WAKEUP; | |
1586 | break; | |
1cd8fd28 TB |
1587 | case USB_DEVICE_U1_ENABLE: |
1588 | if (dummy_hcd_to_hcd(dum_hcd)->speed == | |
1589 | HCD_USB3) | |
1590 | w_value = USB_DEV_STAT_U1_ENABLED; | |
1591 | else | |
1592 | ret_val = -EOPNOTSUPP; | |
1593 | break; | |
1594 | case USB_DEVICE_U2_ENABLE: | |
1595 | if (dummy_hcd_to_hcd(dum_hcd)->speed == | |
1596 | HCD_USB3) | |
1597 | w_value = USB_DEV_STAT_U2_ENABLED; | |
1598 | else | |
1599 | ret_val = -EOPNOTSUPP; | |
1600 | break; | |
1601 | case USB_DEVICE_LTM_ENABLE: | |
1602 | if (dummy_hcd_to_hcd(dum_hcd)->speed == | |
1603 | HCD_USB3) | |
1604 | w_value = USB_DEV_STAT_LTM_ENABLED; | |
1605 | else | |
1606 | ret_val = -EOPNOTSUPP; | |
1607 | break; | |
8be8a9d3 TB |
1608 | default: |
1609 | ret_val = -EOPNOTSUPP; | |
1610 | break; | |
1611 | } | |
1612 | if (ret_val == 0) { | |
1613 | dum->devstatus &= ~(1 << w_value); | |
1614 | *status = 0; | |
1615 | } | |
1616 | } else if (setup->bRequestType == Ep_Request) { | |
1617 | /* endpoint halt */ | |
1618 | ep2 = find_endpoint(dum, w_index); | |
1619 | if (!ep2) { | |
1620 | ret_val = -EOPNOTSUPP; | |
1621 | break; | |
1622 | } | |
1623 | if (!ep2->wedged) | |
1624 | ep2->halted = 0; | |
1625 | ret_val = 0; | |
1626 | *status = 0; | |
1627 | } | |
1628 | break; | |
1629 | case USB_REQ_GET_STATUS: | |
1630 | if (setup->bRequestType == Dev_InRequest | |
1631 | || setup->bRequestType == Intf_InRequest | |
1632 | || setup->bRequestType == Ep_InRequest) { | |
1633 | char *buf; | |
1634 | /* | |
1635 | * device: remote wakeup, selfpowered | |
1636 | * interface: nothing | |
1637 | * endpoint: halt | |
1638 | */ | |
1639 | buf = (char *)urb->transfer_buffer; | |
1640 | if (urb->transfer_buffer_length > 0) { | |
1641 | if (setup->bRequestType == Ep_InRequest) { | |
1642 | ep2 = find_endpoint(dum, w_index); | |
1643 | if (!ep2) { | |
1644 | ret_val = -EOPNOTSUPP; | |
1645 | break; | |
1646 | } | |
1647 | buf[0] = ep2->halted; | |
1648 | } else if (setup->bRequestType == | |
1649 | Dev_InRequest) { | |
1650 | buf[0] = (u8)dum->devstatus; | |
1651 | } else | |
1652 | buf[0] = 0; | |
1653 | } | |
1654 | if (urb->transfer_buffer_length > 1) | |
1655 | buf[1] = 0; | |
1656 | urb->actual_length = min_t(u32, 2, | |
1657 | urb->transfer_buffer_length); | |
1658 | ret_val = 0; | |
1659 | *status = 0; | |
1660 | } | |
1661 | break; | |
1662 | } | |
1663 | return ret_val; | |
1664 | } | |
1665 | ||
1da177e4 LT |
1666 | /* drive both sides of the transfers; looks like irq handlers to |
1667 | * both drivers except the callbacks aren't in_irq(). | |
1668 | */ | |
cdfcbd2c | 1669 | static void dummy_timer(unsigned long _dum_hcd) |
1da177e4 | 1670 | { |
cdfcbd2c TB |
1671 | struct dummy_hcd *dum_hcd = (struct dummy_hcd *) _dum_hcd; |
1672 | struct dummy *dum = dum_hcd->dum; | |
1da177e4 LT |
1673 | struct urbp *urbp, *tmp; |
1674 | unsigned long flags; | |
1675 | int limit, total; | |
1676 | int i; | |
1677 | ||
1678 | /* simplistic model for one frame's bandwidth */ | |
1679 | switch (dum->gadget.speed) { | |
1680 | case USB_SPEED_LOW: | |
1681 | total = 8/*bytes*/ * 12/*packets*/; | |
1682 | break; | |
1683 | case USB_SPEED_FULL: | |
1684 | total = 64/*bytes*/ * 19/*packets*/; | |
1685 | break; | |
1686 | case USB_SPEED_HIGH: | |
1687 | total = 512/*bytes*/ * 13/*packets*/ * 8/*uframes*/; | |
1688 | break; | |
1cd8fd28 TB |
1689 | case USB_SPEED_SUPER: |
1690 | /* Bus speed is 500000 bytes/ms, so use a little less */ | |
1691 | total = 490000; | |
1692 | break; | |
1da177e4 | 1693 | default: |
cdfcbd2c | 1694 | dev_err(dummy_dev(dum_hcd), "bogus device speed\n"); |
1da177e4 LT |
1695 | return; |
1696 | } | |
1697 | ||
1698 | /* FIXME if HZ != 1000 this will probably misbehave ... */ | |
1699 | ||
1700 | /* look at each urb queued by the host side driver */ | |
18f2cbaa | 1701 | spin_lock_irqsave(&dum->lock, flags); |
1da177e4 | 1702 | |
cdfcbd2c TB |
1703 | if (!dum_hcd->udev) { |
1704 | dev_err(dummy_dev(dum_hcd), | |
1da177e4 | 1705 | "timer fired with no URBs pending?\n"); |
18f2cbaa | 1706 | spin_unlock_irqrestore(&dum->lock, flags); |
1da177e4 LT |
1707 | return; |
1708 | } | |
1709 | ||
1710 | for (i = 0; i < DUMMY_ENDPOINTS; i++) { | |
18f2cbaa | 1711 | if (!ep_name[i]) |
1da177e4 | 1712 | break; |
18f2cbaa | 1713 | dum->ep[i].already_seen = 0; |
1da177e4 LT |
1714 | } |
1715 | ||
1716 | restart: | |
cdfcbd2c | 1717 | list_for_each_entry_safe(urbp, tmp, &dum_hcd->urbp_list, urbp_list) { |
1da177e4 LT |
1718 | struct urb *urb; |
1719 | struct dummy_request *req; | |
1720 | u8 address; | |
1721 | struct dummy_ep *ep = NULL; | |
1722 | int type; | |
4d2f110c | 1723 | int status = -EINPROGRESS; |
1da177e4 LT |
1724 | |
1725 | urb = urbp->urb; | |
eb231054 | 1726 | if (urb->unlinked) |
1da177e4 | 1727 | goto return_urb; |
cdfcbd2c | 1728 | else if (dum_hcd->rh_state != DUMMY_RH_RUNNING) |
391eca9d | 1729 | continue; |
18f2cbaa | 1730 | type = usb_pipetype(urb->pipe); |
1da177e4 LT |
1731 | |
1732 | /* used up this frame's non-periodic bandwidth? | |
1733 | * FIXME there's infinite bandwidth for control and | |
1734 | * periodic transfers ... unrealistic. | |
1735 | */ | |
1736 | if (total <= 0 && type == PIPE_BULK) | |
1737 | continue; | |
1738 | ||
1739 | /* find the gadget's ep for this request (if configured) */ | |
1740 | address = usb_pipeendpoint (urb->pipe); | |
18f2cbaa | 1741 | if (usb_pipein(urb->pipe)) |
1da177e4 LT |
1742 | address |= USB_DIR_IN; |
1743 | ep = find_endpoint(dum, address); | |
1744 | if (!ep) { | |
1745 | /* set_configuration() disagreement */ | |
cdfcbd2c | 1746 | dev_dbg(dummy_dev(dum_hcd), |
1da177e4 LT |
1747 | "no ep configured for urb %p\n", |
1748 | urb); | |
4d2f110c | 1749 | status = -EPROTO; |
1da177e4 LT |
1750 | goto return_urb; |
1751 | } | |
1752 | ||
1753 | if (ep->already_seen) | |
1754 | continue; | |
1755 | ep->already_seen = 1; | |
18f2cbaa | 1756 | if (ep == &dum->ep[0] && urb->error_count) { |
1da177e4 LT |
1757 | ep->setup_stage = 1; /* a new urb */ |
1758 | urb->error_count = 0; | |
1759 | } | |
1760 | if (ep->halted && !ep->setup_stage) { | |
1761 | /* NOTE: must not be iso! */ | |
cdfcbd2c | 1762 | dev_dbg(dummy_dev(dum_hcd), "ep %s halted, urb %p\n", |
1da177e4 | 1763 | ep->ep.name, urb); |
4d2f110c | 1764 | status = -EPIPE; |
1da177e4 LT |
1765 | goto return_urb; |
1766 | } | |
1767 | /* FIXME make sure both ends agree on maxpacket */ | |
1768 | ||
1769 | /* handle control requests */ | |
18f2cbaa | 1770 | if (ep == &dum->ep[0] && ep->setup_stage) { |
1da177e4 LT |
1771 | struct usb_ctrlrequest setup; |
1772 | int value = 1; | |
1da177e4 | 1773 | |
18f2cbaa | 1774 | setup = *(struct usb_ctrlrequest *) urb->setup_packet; |
1da177e4 | 1775 | /* paranoia, in case of stale queued data */ |
18f2cbaa SAS |
1776 | list_for_each_entry(req, &ep->queue, queue) { |
1777 | list_del_init(&req->queue); | |
1da177e4 | 1778 | req->req.status = -EOVERFLOW; |
18f2cbaa | 1779 | dev_dbg(udc_dev(dum), "stale req = %p\n", |
1da177e4 LT |
1780 | req); |
1781 | ||
18f2cbaa SAS |
1782 | spin_unlock(&dum->lock); |
1783 | req->req.complete(&ep->ep, &req->req); | |
1784 | spin_lock(&dum->lock); | |
1da177e4 LT |
1785 | ep->already_seen = 0; |
1786 | goto restart; | |
1787 | } | |
1788 | ||
1789 | /* gadget driver never sees set_address or operations | |
1790 | * on standard feature flags. some hardware doesn't | |
1791 | * even expose them. | |
1792 | */ | |
1793 | ep->last_io = jiffies; | |
1794 | ep->setup_stage = 0; | |
1795 | ep->halted = 0; | |
1da177e4 | 1796 | |
cdfcbd2c | 1797 | value = handle_control_request(dum_hcd, urb, &setup, |
8be8a9d3 | 1798 | &status); |
1da177e4 LT |
1799 | |
1800 | /* gadget driver handles all other requests. block | |
1801 | * until setup() returns; no reentrancy issues etc. | |
1802 | */ | |
1803 | if (value > 0) { | |
18f2cbaa SAS |
1804 | spin_unlock(&dum->lock); |
1805 | value = dum->driver->setup(&dum->gadget, | |
1da177e4 | 1806 | &setup); |
18f2cbaa | 1807 | spin_lock(&dum->lock); |
1da177e4 LT |
1808 | |
1809 | if (value >= 0) { | |
1810 | /* no delays (max 64KB data stage) */ | |
1811 | limit = 64*1024; | |
1812 | goto treat_control_like_bulk; | |
1813 | } | |
1814 | /* error, see below */ | |
1815 | } | |
1816 | ||
1817 | if (value < 0) { | |
1818 | if (value != -EOPNOTSUPP) | |
18f2cbaa | 1819 | dev_dbg(udc_dev(dum), |
1da177e4 LT |
1820 | "setup --> %d\n", |
1821 | value); | |
4d2f110c | 1822 | status = -EPIPE; |
1da177e4 LT |
1823 | urb->actual_length = 0; |
1824 | } | |
1825 | ||
1826 | goto return_urb; | |
1827 | } | |
1828 | ||
1829 | /* non-control requests */ | |
1830 | limit = total; | |
18f2cbaa | 1831 | switch (usb_pipetype(urb->pipe)) { |
1da177e4 LT |
1832 | case PIPE_ISOCHRONOUS: |
1833 | /* FIXME is it urb->interval since the last xfer? | |
1834 | * use urb->iso_frame_desc[i]. | |
1835 | * complete whether or not ep has requests queued. | |
1836 | * report random errors, to debug drivers. | |
1837 | */ | |
18f2cbaa | 1838 | limit = max(limit, periodic_bytes(dum, ep)); |
4d2f110c | 1839 | status = -ENOSYS; |
1da177e4 LT |
1840 | break; |
1841 | ||
1842 | case PIPE_INTERRUPT: | |
1843 | /* FIXME is it urb->interval since the last xfer? | |
1844 | * this almost certainly polls too fast. | |
1845 | */ | |
18f2cbaa | 1846 | limit = max(limit, periodic_bytes(dum, ep)); |
1da177e4 LT |
1847 | /* FALLTHROUGH */ |
1848 | ||
1da177e4 | 1849 | default: |
18f2cbaa | 1850 | treat_control_like_bulk: |
1da177e4 | 1851 | ep->last_io = jiffies; |
a54c979f | 1852 | total = transfer(dum_hcd, urb, ep, limit, &status); |
1da177e4 LT |
1853 | break; |
1854 | } | |
1855 | ||
1856 | /* incomplete transfer? */ | |
4d2f110c | 1857 | if (status == -EINPROGRESS) |
1da177e4 LT |
1858 | continue; |
1859 | ||
1860 | return_urb: | |
18f2cbaa SAS |
1861 | list_del(&urbp->urbp_list); |
1862 | kfree(urbp); | |
1da177e4 LT |
1863 | if (ep) |
1864 | ep->already_seen = ep->setup_stage = 0; | |
1865 | ||
cdfcbd2c | 1866 | usb_hcd_unlink_urb_from_ep(dummy_hcd_to_hcd(dum_hcd), urb); |
18f2cbaa | 1867 | spin_unlock(&dum->lock); |
cdfcbd2c | 1868 | usb_hcd_giveback_urb(dummy_hcd_to_hcd(dum_hcd), urb, status); |
18f2cbaa | 1869 | spin_lock(&dum->lock); |
1da177e4 LT |
1870 | |
1871 | goto restart; | |
1872 | } | |
1873 | ||
cdfcbd2c TB |
1874 | if (list_empty(&dum_hcd->urbp_list)) { |
1875 | usb_put_dev(dum_hcd->udev); | |
1876 | dum_hcd->udev = NULL; | |
1877 | } else if (dum_hcd->rh_state == DUMMY_RH_RUNNING) { | |
391eca9d | 1878 | /* want a 1 msec delay here */ |
cdfcbd2c | 1879 | mod_timer(&dum_hcd->timer, jiffies + msecs_to_jiffies(1)); |
1da177e4 LT |
1880 | } |
1881 | ||
18f2cbaa | 1882 | spin_unlock_irqrestore(&dum->lock, flags); |
1da177e4 LT |
1883 | } |
1884 | ||
1885 | /*-------------------------------------------------------------------------*/ | |
1886 | ||
1887 | #define PORT_C_MASK \ | |
c2db8b5e AS |
1888 | ((USB_PORT_STAT_C_CONNECTION \ |
1889 | | USB_PORT_STAT_C_ENABLE \ | |
1890 | | USB_PORT_STAT_C_SUSPEND \ | |
1891 | | USB_PORT_STAT_C_OVERCURRENT \ | |
1892 | | USB_PORT_STAT_C_RESET) << 16) | |
1da177e4 | 1893 | |
18f2cbaa | 1894 | static int dummy_hub_status(struct usb_hcd *hcd, char *buf) |
1da177e4 | 1895 | { |
cdfcbd2c | 1896 | struct dummy_hcd *dum_hcd; |
1da177e4 | 1897 | unsigned long flags; |
391eca9d | 1898 | int retval = 0; |
1da177e4 | 1899 | |
cdfcbd2c | 1900 | dum_hcd = hcd_to_dummy_hcd(hcd); |
1da177e4 | 1901 | |
cdfcbd2c | 1902 | spin_lock_irqsave(&dum_hcd->dum->lock, flags); |
541c7d43 | 1903 | if (!HCD_HW_ACCESSIBLE(hcd)) |
391eca9d | 1904 | goto done; |
f1c39fad | 1905 | |
cdfcbd2c TB |
1906 | if (dum_hcd->resuming && time_after_eq(jiffies, dum_hcd->re_timeout)) { |
1907 | dum_hcd->port_status |= (USB_PORT_STAT_C_SUSPEND << 16); | |
1908 | dum_hcd->port_status &= ~USB_PORT_STAT_SUSPEND; | |
1909 | set_link_state(dum_hcd); | |
f1c39fad AS |
1910 | } |
1911 | ||
cdfcbd2c | 1912 | if ((dum_hcd->port_status & PORT_C_MASK) != 0) { |
1da177e4 | 1913 | *buf = (1 << 1); |
cdfcbd2c TB |
1914 | dev_dbg(dummy_dev(dum_hcd), "port status 0x%08x has changes\n", |
1915 | dum_hcd->port_status); | |
1da177e4 | 1916 | retval = 1; |
cdfcbd2c | 1917 | if (dum_hcd->rh_state == DUMMY_RH_SUSPENDED) |
18f2cbaa | 1918 | usb_hcd_resume_root_hub(hcd); |
1da177e4 | 1919 | } |
391eca9d | 1920 | done: |
cdfcbd2c | 1921 | spin_unlock_irqrestore(&dum_hcd->dum->lock, flags); |
1da177e4 LT |
1922 | return retval; |
1923 | } | |
1924 | ||
3b9c1c5b SAS |
1925 | /* usb 3.0 root hub device descriptor */ |
1926 | struct { | |
1927 | struct usb_bos_descriptor bos; | |
1928 | struct usb_ss_cap_descriptor ss_cap; | |
1929 | } __packed usb3_bos_desc = { | |
1930 | ||
1931 | .bos = { | |
1932 | .bLength = USB_DT_BOS_SIZE, | |
1933 | .bDescriptorType = USB_DT_BOS, | |
1934 | .wTotalLength = cpu_to_le16(sizeof(usb3_bos_desc)), | |
1935 | .bNumDeviceCaps = 1, | |
1936 | }, | |
1937 | .ss_cap = { | |
1938 | .bLength = USB_DT_USB_SS_CAP_SIZE, | |
1939 | .bDescriptorType = USB_DT_DEVICE_CAPABILITY, | |
1940 | .bDevCapabilityType = USB_SS_CAP_TYPE, | |
1941 | .wSpeedSupported = cpu_to_le16(USB_5GBPS_OPERATION), | |
1942 | .bFunctionalitySupport = ilog2(USB_5GBPS_OPERATION), | |
1943 | }, | |
1944 | }; | |
1945 | ||
1cd8fd28 TB |
1946 | static inline void |
1947 | ss_hub_descriptor(struct usb_hub_descriptor *desc) | |
1948 | { | |
1949 | memset(desc, 0, sizeof *desc); | |
1950 | desc->bDescriptorType = 0x2a; | |
1951 | desc->bDescLength = 12; | |
1952 | desc->wHubCharacteristics = cpu_to_le16(0x0001); | |
1953 | desc->bNbrPorts = 1; | |
1954 | desc->u.ss.bHubHdrDecLat = 0x04; /* Worst case: 0.4 micro sec*/ | |
1955 | desc->u.ss.DeviceRemovable = 0xffff; | |
1956 | } | |
1957 | ||
18f2cbaa | 1958 | static inline void hub_descriptor(struct usb_hub_descriptor *desc) |
1da177e4 | 1959 | { |
18f2cbaa | 1960 | memset(desc, 0, sizeof *desc); |
1da177e4 LT |
1961 | desc->bDescriptorType = 0x29; |
1962 | desc->bDescLength = 9; | |
fd05e720 | 1963 | desc->wHubCharacteristics = cpu_to_le16(0x0001); |
1da177e4 | 1964 | desc->bNbrPorts = 1; |
dbe79bbe JY |
1965 | desc->u.hs.DeviceRemovable[0] = 0xff; |
1966 | desc->u.hs.DeviceRemovable[1] = 0xff; | |
1da177e4 LT |
1967 | } |
1968 | ||
18f2cbaa | 1969 | static int dummy_hub_control( |
1da177e4 LT |
1970 | struct usb_hcd *hcd, |
1971 | u16 typeReq, | |
1972 | u16 wValue, | |
1973 | u16 wIndex, | |
1974 | char *buf, | |
1975 | u16 wLength | |
1976 | ) { | |
cdfcbd2c | 1977 | struct dummy_hcd *dum_hcd; |
1da177e4 LT |
1978 | int retval = 0; |
1979 | unsigned long flags; | |
1980 | ||
541c7d43 | 1981 | if (!HCD_HW_ACCESSIBLE(hcd)) |
391eca9d AS |
1982 | return -ETIMEDOUT; |
1983 | ||
cdfcbd2c TB |
1984 | dum_hcd = hcd_to_dummy_hcd(hcd); |
1985 | ||
1986 | spin_lock_irqsave(&dum_hcd->dum->lock, flags); | |
1da177e4 LT |
1987 | switch (typeReq) { |
1988 | case ClearHubFeature: | |
1989 | break; | |
1990 | case ClearPortFeature: | |
1991 | switch (wValue) { | |
1992 | case USB_PORT_FEAT_SUSPEND: | |
1cd8fd28 TB |
1993 | if (hcd->speed == HCD_USB3) { |
1994 | dev_dbg(dummy_dev(dum_hcd), | |
1995 | "USB_PORT_FEAT_SUSPEND req not " | |
1996 | "supported for USB 3.0 roothub\n"); | |
1997 | goto error; | |
1998 | } | |
cdfcbd2c | 1999 | if (dum_hcd->port_status & USB_PORT_STAT_SUSPEND) { |
1da177e4 | 2000 | /* 20msec resume signaling */ |
cdfcbd2c TB |
2001 | dum_hcd->resuming = 1; |
2002 | dum_hcd->re_timeout = jiffies + | |
f1c39fad | 2003 | msecs_to_jiffies(20); |
1da177e4 LT |
2004 | } |
2005 | break; | |
2006 | case USB_PORT_FEAT_POWER: | |
1cd8fd28 TB |
2007 | if (hcd->speed == HCD_USB3) { |
2008 | if (dum_hcd->port_status & USB_PORT_STAT_POWER) | |
2009 | dev_dbg(dummy_dev(dum_hcd), | |
2010 | "power-off\n"); | |
2011 | } else | |
2012 | if (dum_hcd->port_status & | |
2013 | USB_SS_PORT_STAT_POWER) | |
2014 | dev_dbg(dummy_dev(dum_hcd), | |
2015 | "power-off\n"); | |
f1c39fad | 2016 | /* FALLS THROUGH */ |
1da177e4 | 2017 | default: |
cdfcbd2c TB |
2018 | dum_hcd->port_status &= ~(1 << wValue); |
2019 | set_link_state(dum_hcd); | |
1da177e4 LT |
2020 | } |
2021 | break; | |
2022 | case GetHubDescriptor: | |
1cd8fd28 TB |
2023 | if (hcd->speed == HCD_USB3 && |
2024 | (wLength < USB_DT_SS_HUB_SIZE || | |
2025 | wValue != (USB_DT_SS_HUB << 8))) { | |
2026 | dev_dbg(dummy_dev(dum_hcd), | |
2027 | "Wrong hub descriptor type for " | |
2028 | "USB 3.0 roothub.\n"); | |
2029 | goto error; | |
2030 | } | |
2031 | if (hcd->speed == HCD_USB3) | |
2032 | ss_hub_descriptor((struct usb_hub_descriptor *) buf); | |
2033 | else | |
2034 | hub_descriptor((struct usb_hub_descriptor *) buf); | |
1da177e4 | 2035 | break; |
3b9c1c5b SAS |
2036 | |
2037 | case DeviceRequest | USB_REQ_GET_DESCRIPTOR: | |
2038 | if (hcd->speed != HCD_USB3) | |
2039 | goto error; | |
2040 | ||
2041 | if ((wValue >> 8) != USB_DT_BOS) | |
2042 | goto error; | |
2043 | ||
2044 | memcpy(buf, &usb3_bos_desc, sizeof(usb3_bos_desc)); | |
2045 | retval = sizeof(usb3_bos_desc); | |
2046 | break; | |
2047 | ||
1da177e4 | 2048 | case GetHubStatus: |
18f2cbaa | 2049 | *(__le32 *) buf = cpu_to_le32(0); |
1da177e4 LT |
2050 | break; |
2051 | case GetPortStatus: | |
2052 | if (wIndex != 1) | |
2053 | retval = -EPIPE; | |
2054 | ||
2055 | /* whoever resets or resumes must GetPortStatus to | |
2056 | * complete it!! | |
2057 | */ | |
cdfcbd2c TB |
2058 | if (dum_hcd->resuming && |
2059 | time_after_eq(jiffies, dum_hcd->re_timeout)) { | |
2060 | dum_hcd->port_status |= (USB_PORT_STAT_C_SUSPEND << 16); | |
2061 | dum_hcd->port_status &= ~USB_PORT_STAT_SUSPEND; | |
1da177e4 | 2062 | } |
cdfcbd2c TB |
2063 | if ((dum_hcd->port_status & USB_PORT_STAT_RESET) != 0 && |
2064 | time_after_eq(jiffies, dum_hcd->re_timeout)) { | |
2065 | dum_hcd->port_status |= (USB_PORT_STAT_C_RESET << 16); | |
2066 | dum_hcd->port_status &= ~USB_PORT_STAT_RESET; | |
2067 | if (dum_hcd->dum->pullup) { | |
2068 | dum_hcd->port_status |= USB_PORT_STAT_ENABLE; | |
1cd8fd28 TB |
2069 | |
2070 | if (hcd->speed < HCD_USB3) { | |
2071 | switch (dum_hcd->dum->gadget.speed) { | |
2072 | case USB_SPEED_HIGH: | |
2073 | dum_hcd->port_status |= | |
2074 | USB_PORT_STAT_HIGH_SPEED; | |
2075 | break; | |
2076 | case USB_SPEED_LOW: | |
2077 | dum_hcd->dum->gadget.ep0-> | |
2078 | maxpacket = 8; | |
2079 | dum_hcd->port_status |= | |
2080 | USB_PORT_STAT_LOW_SPEED; | |
2081 | break; | |
2082 | default: | |
2083 | dum_hcd->dum->gadget.speed = | |
2084 | USB_SPEED_FULL; | |
2085 | break; | |
2086 | } | |
1da177e4 LT |
2087 | } |
2088 | } | |
2089 | } | |
cdfcbd2c | 2090 | set_link_state(dum_hcd); |
18f2cbaa SAS |
2091 | ((__le16 *) buf)[0] = cpu_to_le16(dum_hcd->port_status); |
2092 | ((__le16 *) buf)[1] = cpu_to_le16(dum_hcd->port_status >> 16); | |
1da177e4 LT |
2093 | break; |
2094 | case SetHubFeature: | |
2095 | retval = -EPIPE; | |
2096 | break; | |
2097 | case SetPortFeature: | |
2098 | switch (wValue) { | |
1cd8fd28 TB |
2099 | case USB_PORT_FEAT_LINK_STATE: |
2100 | if (hcd->speed != HCD_USB3) { | |
2101 | dev_dbg(dummy_dev(dum_hcd), | |
2102 | "USB_PORT_FEAT_LINK_STATE req not " | |
2103 | "supported for USB 2.0 roothub\n"); | |
2104 | goto error; | |
2105 | } | |
2106 | /* | |
2107 | * Since this is dummy we don't have an actual link so | |
2108 | * there is nothing to do for the SET_LINK_STATE cmd | |
2109 | */ | |
2110 | break; | |
2111 | case USB_PORT_FEAT_U1_TIMEOUT: | |
2112 | case USB_PORT_FEAT_U2_TIMEOUT: | |
2113 | /* TODO: add suspend/resume support! */ | |
2114 | if (hcd->speed != HCD_USB3) { | |
2115 | dev_dbg(dummy_dev(dum_hcd), | |
2116 | "USB_PORT_FEAT_U1/2_TIMEOUT req not " | |
2117 | "supported for USB 2.0 roothub\n"); | |
2118 | goto error; | |
2119 | } | |
2120 | break; | |
1da177e4 | 2121 | case USB_PORT_FEAT_SUSPEND: |
1cd8fd28 TB |
2122 | /* Applicable only for USB2.0 hub */ |
2123 | if (hcd->speed == HCD_USB3) { | |
2124 | dev_dbg(dummy_dev(dum_hcd), | |
2125 | "USB_PORT_FEAT_SUSPEND req not " | |
2126 | "supported for USB 3.0 roothub\n"); | |
2127 | goto error; | |
2128 | } | |
cdfcbd2c TB |
2129 | if (dum_hcd->active) { |
2130 | dum_hcd->port_status |= USB_PORT_STAT_SUSPEND; | |
f1c39fad AS |
2131 | |
2132 | /* HNP would happen here; for now we | |
2133 | * assume b_bus_req is always true. | |
2134 | */ | |
cdfcbd2c | 2135 | set_link_state(dum_hcd); |
f1c39fad | 2136 | if (((1 << USB_DEVICE_B_HNP_ENABLE) |
cdfcbd2c TB |
2137 | & dum_hcd->dum->devstatus) != 0) |
2138 | dev_dbg(dummy_dev(dum_hcd), | |
5742b0c9 | 2139 | "no HNP yet!\n"); |
1da177e4 LT |
2140 | } |
2141 | break; | |
f1c39fad | 2142 | case USB_PORT_FEAT_POWER: |
1cd8fd28 TB |
2143 | if (hcd->speed == HCD_USB3) |
2144 | dum_hcd->port_status |= USB_SS_PORT_STAT_POWER; | |
2145 | else | |
2146 | dum_hcd->port_status |= USB_PORT_STAT_POWER; | |
cdfcbd2c | 2147 | set_link_state(dum_hcd); |
f1c39fad | 2148 | break; |
1cd8fd28 TB |
2149 | case USB_PORT_FEAT_BH_PORT_RESET: |
2150 | /* Applicable only for USB3.0 hub */ | |
2151 | if (hcd->speed != HCD_USB3) { | |
2152 | dev_dbg(dummy_dev(dum_hcd), | |
2153 | "USB_PORT_FEAT_BH_PORT_RESET req not " | |
2154 | "supported for USB 2.0 roothub\n"); | |
2155 | goto error; | |
2156 | } | |
2157 | /* FALLS THROUGH */ | |
1da177e4 | 2158 | case USB_PORT_FEAT_RESET: |
f1c39fad | 2159 | /* if it's already enabled, disable */ |
1cd8fd28 TB |
2160 | if (hcd->speed == HCD_USB3) { |
2161 | dum_hcd->port_status = 0; | |
2162 | dum_hcd->port_status = | |
2163 | (USB_SS_PORT_STAT_POWER | | |
2164 | USB_PORT_STAT_CONNECTION | | |
2165 | USB_PORT_STAT_RESET); | |
2166 | } else | |
2167 | dum_hcd->port_status &= ~(USB_PORT_STAT_ENABLE | |
f1c39fad AS |
2168 | | USB_PORT_STAT_LOW_SPEED |
2169 | | USB_PORT_STAT_HIGH_SPEED); | |
cdfcbd2c TB |
2170 | /* |
2171 | * We want to reset device status. All but the | |
2172 | * Self powered feature | |
2173 | */ | |
2174 | dum_hcd->dum->devstatus &= | |
2175 | (1 << USB_DEVICE_SELF_POWERED); | |
1cd8fd28 TB |
2176 | /* |
2177 | * FIXME USB3.0: what is the correct reset signaling | |
2178 | * interval? Is it still 50msec as for HS? | |
2179 | */ | |
cdfcbd2c | 2180 | dum_hcd->re_timeout = jiffies + msecs_to_jiffies(50); |
f1c39fad | 2181 | /* FALLS THROUGH */ |
1da177e4 | 2182 | default: |
1cd8fd28 TB |
2183 | if (hcd->speed == HCD_USB3) { |
2184 | if ((dum_hcd->port_status & | |
2185 | USB_SS_PORT_STAT_POWER) != 0) { | |
2186 | dum_hcd->port_status |= (1 << wValue); | |
2187 | set_link_state(dum_hcd); | |
2188 | } | |
2189 | } else | |
2190 | if ((dum_hcd->port_status & | |
2191 | USB_PORT_STAT_POWER) != 0) { | |
2192 | dum_hcd->port_status |= (1 << wValue); | |
2193 | set_link_state(dum_hcd); | |
2194 | } | |
2195 | } | |
2196 | break; | |
2197 | case GetPortErrorCount: | |
2198 | if (hcd->speed != HCD_USB3) { | |
2199 | dev_dbg(dummy_dev(dum_hcd), | |
2200 | "GetPortErrorCount req not " | |
2201 | "supported for USB 2.0 roothub\n"); | |
2202 | goto error; | |
2203 | } | |
2204 | /* We'll always return 0 since this is a dummy hub */ | |
2205 | *(__le32 *) buf = cpu_to_le32(0); | |
2206 | break; | |
2207 | case SetHubDepth: | |
2208 | if (hcd->speed != HCD_USB3) { | |
2209 | dev_dbg(dummy_dev(dum_hcd), | |
2210 | "SetHubDepth req not supported for " | |
2211 | "USB 2.0 roothub\n"); | |
2212 | goto error; | |
1da177e4 LT |
2213 | } |
2214 | break; | |
1da177e4 | 2215 | default: |
cdfcbd2c | 2216 | dev_dbg(dummy_dev(dum_hcd), |
1da177e4 LT |
2217 | "hub control req%04x v%04x i%04x l%d\n", |
2218 | typeReq, wValue, wIndex, wLength); | |
1cd8fd28 | 2219 | error: |
1da177e4 LT |
2220 | /* "protocol stall" on error */ |
2221 | retval = -EPIPE; | |
2222 | } | |
cdfcbd2c | 2223 | spin_unlock_irqrestore(&dum_hcd->dum->lock, flags); |
685eb93f | 2224 | |
cdfcbd2c | 2225 | if ((dum_hcd->port_status & PORT_C_MASK) != 0) |
18f2cbaa | 2226 | usb_hcd_poll_rh_status(hcd); |
1da177e4 LT |
2227 | return retval; |
2228 | } | |
2229 | ||
18f2cbaa | 2230 | static int dummy_bus_suspend(struct usb_hcd *hcd) |
391eca9d | 2231 | { |
cdfcbd2c | 2232 | struct dummy_hcd *dum_hcd = hcd_to_dummy_hcd(hcd); |
391eca9d | 2233 | |
18f2cbaa | 2234 | dev_dbg(&hcd->self.root_hub->dev, "%s\n", __func__); |
3cf0a22e | 2235 | |
cdfcbd2c TB |
2236 | spin_lock_irq(&dum_hcd->dum->lock); |
2237 | dum_hcd->rh_state = DUMMY_RH_SUSPENDED; | |
2238 | set_link_state(dum_hcd); | |
3cf0a22e | 2239 | hcd->state = HC_STATE_SUSPENDED; |
cdfcbd2c | 2240 | spin_unlock_irq(&dum_hcd->dum->lock); |
391eca9d AS |
2241 | return 0; |
2242 | } | |
2243 | ||
18f2cbaa | 2244 | static int dummy_bus_resume(struct usb_hcd *hcd) |
391eca9d | 2245 | { |
cdfcbd2c | 2246 | struct dummy_hcd *dum_hcd = hcd_to_dummy_hcd(hcd); |
3cf0a22e AS |
2247 | int rc = 0; |
2248 | ||
18f2cbaa | 2249 | dev_dbg(&hcd->self.root_hub->dev, "%s\n", __func__); |
391eca9d | 2250 | |
cdfcbd2c | 2251 | spin_lock_irq(&dum_hcd->dum->lock); |
541c7d43 | 2252 | if (!HCD_HW_ACCESSIBLE(hcd)) { |
cfa59dab | 2253 | rc = -ESHUTDOWN; |
3cf0a22e | 2254 | } else { |
cdfcbd2c TB |
2255 | dum_hcd->rh_state = DUMMY_RH_RUNNING; |
2256 | set_link_state(dum_hcd); | |
2257 | if (!list_empty(&dum_hcd->urbp_list)) | |
2258 | mod_timer(&dum_hcd->timer, jiffies); | |
3cf0a22e AS |
2259 | hcd->state = HC_STATE_RUNNING; |
2260 | } | |
cdfcbd2c | 2261 | spin_unlock_irq(&dum_hcd->dum->lock); |
3cf0a22e | 2262 | return rc; |
391eca9d | 2263 | } |
1da177e4 LT |
2264 | |
2265 | /*-------------------------------------------------------------------------*/ | |
2266 | ||
18f2cbaa | 2267 | static inline ssize_t show_urb(char *buf, size_t size, struct urb *urb) |
1da177e4 | 2268 | { |
18f2cbaa | 2269 | int ep = usb_pipeendpoint(urb->pipe); |
1da177e4 | 2270 | |
18f2cbaa | 2271 | return snprintf(buf, size, |
1da177e4 LT |
2272 | "urb/%p %s ep%d%s%s len %d/%d\n", |
2273 | urb, | |
2274 | ({ char *s; | |
18f2cbaa SAS |
2275 | switch (urb->dev->speed) { |
2276 | case USB_SPEED_LOW: | |
7c884fe4 TB |
2277 | s = "ls"; |
2278 | break; | |
18f2cbaa | 2279 | case USB_SPEED_FULL: |
7c884fe4 TB |
2280 | s = "fs"; |
2281 | break; | |
18f2cbaa | 2282 | case USB_SPEED_HIGH: |
7c884fe4 TB |
2283 | s = "hs"; |
2284 | break; | |
18f2cbaa | 2285 | case USB_SPEED_SUPER: |
1cd8fd28 TB |
2286 | s = "ss"; |
2287 | break; | |
18f2cbaa | 2288 | default: |
7c884fe4 TB |
2289 | s = "?"; |
2290 | break; | |
1da177e4 | 2291 | }; s; }), |
18f2cbaa | 2292 | ep, ep ? (usb_pipein(urb->pipe) ? "in" : "out") : "", |
1da177e4 | 2293 | ({ char *s; \ |
18f2cbaa SAS |
2294 | switch (usb_pipetype(urb->pipe)) { \ |
2295 | case PIPE_CONTROL: \ | |
7c884fe4 TB |
2296 | s = ""; \ |
2297 | break; \ | |
18f2cbaa | 2298 | case PIPE_BULK: \ |
7c884fe4 TB |
2299 | s = "-bulk"; \ |
2300 | break; \ | |
18f2cbaa | 2301 | case PIPE_INTERRUPT: \ |
7c884fe4 TB |
2302 | s = "-int"; \ |
2303 | break; \ | |
18f2cbaa | 2304 | default: \ |
7c884fe4 TB |
2305 | s = "-iso"; \ |
2306 | break; \ | |
18f2cbaa | 2307 | }; s; }), |
1da177e4 LT |
2308 | urb->actual_length, urb->transfer_buffer_length); |
2309 | } | |
2310 | ||
18f2cbaa SAS |
2311 | static ssize_t show_urbs(struct device *dev, struct device_attribute *attr, |
2312 | char *buf) | |
1da177e4 | 2313 | { |
18f2cbaa | 2314 | struct usb_hcd *hcd = dev_get_drvdata(dev); |
cdfcbd2c | 2315 | struct dummy_hcd *dum_hcd = hcd_to_dummy_hcd(hcd); |
1da177e4 LT |
2316 | struct urbp *urbp; |
2317 | size_t size = 0; | |
2318 | unsigned long flags; | |
2319 | ||
cdfcbd2c TB |
2320 | spin_lock_irqsave(&dum_hcd->dum->lock, flags); |
2321 | list_for_each_entry(urbp, &dum_hcd->urbp_list, urbp_list) { | |
1da177e4 LT |
2322 | size_t temp; |
2323 | ||
18f2cbaa | 2324 | temp = show_urb(buf, PAGE_SIZE - size, urbp->urb); |
1da177e4 LT |
2325 | buf += temp; |
2326 | size += temp; | |
2327 | } | |
cdfcbd2c | 2328 | spin_unlock_irqrestore(&dum_hcd->dum->lock, flags); |
1da177e4 LT |
2329 | |
2330 | return size; | |
2331 | } | |
18f2cbaa | 2332 | static DEVICE_ATTR(urbs, S_IRUGO, show_urbs, NULL); |
1da177e4 | 2333 | |
1cd8fd28 TB |
2334 | static int dummy_start_ss(struct dummy_hcd *dum_hcd) |
2335 | { | |
2336 | init_timer(&dum_hcd->timer); | |
2337 | dum_hcd->timer.function = dummy_timer; | |
2338 | dum_hcd->timer.data = (unsigned long)dum_hcd; | |
2339 | dum_hcd->rh_state = DUMMY_RH_RUNNING; | |
a54c979f | 2340 | dum_hcd->stream_en_ep = 0; |
1cd8fd28 TB |
2341 | INIT_LIST_HEAD(&dum_hcd->urbp_list); |
2342 | dummy_hcd_to_hcd(dum_hcd)->power_budget = POWER_BUDGET; | |
2343 | dummy_hcd_to_hcd(dum_hcd)->state = HC_STATE_RUNNING; | |
2344 | dummy_hcd_to_hcd(dum_hcd)->uses_new_polling = 1; | |
2345 | #ifdef CONFIG_USB_OTG | |
2346 | dummy_hcd_to_hcd(dum_hcd)->self.otg_port = 1; | |
2347 | #endif | |
2348 | return 0; | |
2349 | ||
2350 | /* FIXME 'urbs' should be a per-device thing, maybe in usbcore */ | |
2351 | return device_create_file(dummy_dev(dum_hcd), &dev_attr_urbs); | |
2352 | } | |
2353 | ||
cdfcbd2c | 2354 | static int dummy_start(struct usb_hcd *hcd) |
1da177e4 | 2355 | { |
cdfcbd2c | 2356 | struct dummy_hcd *dum_hcd = hcd_to_dummy_hcd(hcd); |
1da177e4 LT |
2357 | |
2358 | /* | |
2359 | * MASTER side init ... we emulate a root hub that'll only ever | |
2360 | * talk to one device (the slave side). Also appears in sysfs, | |
2361 | * just like more familiar pci-based HCDs. | |
2362 | */ | |
1cd8fd28 TB |
2363 | if (!usb_hcd_is_primary_hcd(hcd)) |
2364 | return dummy_start_ss(dum_hcd); | |
2365 | ||
cdfcbd2c TB |
2366 | spin_lock_init(&dum_hcd->dum->lock); |
2367 | init_timer(&dum_hcd->timer); | |
2368 | dum_hcd->timer.function = dummy_timer; | |
2369 | dum_hcd->timer.data = (unsigned long)dum_hcd; | |
2370 | dum_hcd->rh_state = DUMMY_RH_RUNNING; | |
1da177e4 | 2371 | |
cdfcbd2c | 2372 | INIT_LIST_HEAD(&dum_hcd->urbp_list); |
1da177e4 | 2373 | |
caf29f62 | 2374 | hcd->power_budget = POWER_BUDGET; |
1da177e4 | 2375 | hcd->state = HC_STATE_RUNNING; |
685eb93f | 2376 | hcd->uses_new_polling = 1; |
1da177e4 | 2377 | |
5742b0c9 AS |
2378 | #ifdef CONFIG_USB_OTG |
2379 | hcd->self.otg_port = 1; | |
2380 | #endif | |
2381 | ||
1da177e4 | 2382 | /* FIXME 'urbs' should be a per-device thing, maybe in usbcore */ |
cdfcbd2c | 2383 | return device_create_file(dummy_dev(dum_hcd), &dev_attr_urbs); |
1da177e4 LT |
2384 | } |
2385 | ||
18f2cbaa | 2386 | static void dummy_stop(struct usb_hcd *hcd) |
1da177e4 LT |
2387 | { |
2388 | struct dummy *dum; | |
2389 | ||
18f2cbaa | 2390 | dum = hcd_to_dummy_hcd(hcd)->dum; |
cdfcbd2c TB |
2391 | device_remove_file(dummy_dev(hcd_to_dummy_hcd(hcd)), &dev_attr_urbs); |
2392 | usb_gadget_unregister_driver(dum->driver); | |
2393 | dev_info(dummy_dev(hcd_to_dummy_hcd(hcd)), "stopped\n"); | |
1da177e4 LT |
2394 | } |
2395 | ||
2396 | /*-------------------------------------------------------------------------*/ | |
2397 | ||
18f2cbaa | 2398 | static int dummy_h_get_frame(struct usb_hcd *hcd) |
1da177e4 | 2399 | { |
18f2cbaa | 2400 | return dummy_g_get_frame(NULL); |
1da177e4 LT |
2401 | } |
2402 | ||
cdfcbd2c TB |
2403 | static int dummy_setup(struct usb_hcd *hcd) |
2404 | { | |
14fce33a | 2405 | hcd->self.sg_tablesize = ~0; |
cdfcbd2c TB |
2406 | if (usb_hcd_is_primary_hcd(hcd)) { |
2407 | the_controller.hs_hcd = hcd_to_dummy_hcd(hcd); | |
2408 | the_controller.hs_hcd->dum = &the_controller; | |
1cd8fd28 TB |
2409 | /* |
2410 | * Mark the first roothub as being USB 2.0. | |
2411 | * The USB 3.0 roothub will be registered later by | |
2412 | * dummy_hcd_probe() | |
2413 | */ | |
cdfcbd2c TB |
2414 | hcd->speed = HCD_USB2; |
2415 | hcd->self.root_hub->speed = USB_SPEED_HIGH; | |
1cd8fd28 TB |
2416 | } else { |
2417 | the_controller.ss_hcd = hcd_to_dummy_hcd(hcd); | |
2418 | the_controller.ss_hcd->dum = &the_controller; | |
2419 | hcd->speed = HCD_USB3; | |
2420 | hcd->self.root_hub->speed = USB_SPEED_SUPER; | |
cdfcbd2c TB |
2421 | } |
2422 | return 0; | |
2423 | } | |
2424 | ||
1cd8fd28 | 2425 | /* Change a group of bulk endpoints to support multiple stream IDs */ |
d81f3e4f | 2426 | static int dummy_alloc_streams(struct usb_hcd *hcd, struct usb_device *udev, |
1cd8fd28 TB |
2427 | struct usb_host_endpoint **eps, unsigned int num_eps, |
2428 | unsigned int num_streams, gfp_t mem_flags) | |
2429 | { | |
a54c979f SAS |
2430 | struct dummy_hcd *dum_hcd = hcd_to_dummy_hcd(hcd); |
2431 | unsigned long flags; | |
2432 | int max_stream; | |
2433 | int ret_streams = num_streams; | |
2434 | unsigned int index; | |
2435 | unsigned int i; | |
2436 | ||
2437 | if (!num_eps) | |
2438 | return -EINVAL; | |
2439 | ||
2440 | spin_lock_irqsave(&dum_hcd->dum->lock, flags); | |
2441 | for (i = 0; i < num_eps; i++) { | |
2442 | index = dummy_get_ep_idx(&eps[i]->desc); | |
2443 | if ((1 << index) & dum_hcd->stream_en_ep) { | |
2444 | ret_streams = -EINVAL; | |
2445 | goto out; | |
2446 | } | |
2447 | max_stream = usb_ss_max_streams(&eps[i]->ss_ep_comp); | |
2448 | if (!max_stream) { | |
2449 | ret_streams = -EINVAL; | |
2450 | goto out; | |
2451 | } | |
2452 | if (max_stream < ret_streams) { | |
2453 | dev_dbg(dummy_dev(dum_hcd), "Ep 0x%x only supports %u " | |
2454 | "stream IDs.\n", | |
2455 | eps[i]->desc.bEndpointAddress, | |
2456 | max_stream); | |
2457 | ret_streams = max_stream; | |
2458 | } | |
2459 | } | |
2460 | ||
2461 | for (i = 0; i < num_eps; i++) { | |
2462 | index = dummy_get_ep_idx(&eps[i]->desc); | |
2463 | dum_hcd->stream_en_ep |= 1 << index; | |
2464 | set_max_streams_for_pipe(dum_hcd, | |
2465 | usb_endpoint_num(&eps[i]->desc), ret_streams); | |
2466 | } | |
2467 | out: | |
2468 | spin_unlock_irqrestore(&dum_hcd->dum->lock, flags); | |
2469 | return ret_streams; | |
1cd8fd28 TB |
2470 | } |
2471 | ||
2472 | /* Reverts a group of bulk endpoints back to not using stream IDs. */ | |
d81f3e4f | 2473 | static int dummy_free_streams(struct usb_hcd *hcd, struct usb_device *udev, |
1cd8fd28 TB |
2474 | struct usb_host_endpoint **eps, unsigned int num_eps, |
2475 | gfp_t mem_flags) | |
2476 | { | |
a54c979f SAS |
2477 | struct dummy_hcd *dum_hcd = hcd_to_dummy_hcd(hcd); |
2478 | unsigned long flags; | |
2479 | int ret; | |
2480 | unsigned int index; | |
2481 | unsigned int i; | |
2482 | ||
2483 | spin_lock_irqsave(&dum_hcd->dum->lock, flags); | |
2484 | for (i = 0; i < num_eps; i++) { | |
2485 | index = dummy_get_ep_idx(&eps[i]->desc); | |
2486 | if (!((1 << index) & dum_hcd->stream_en_ep)) { | |
2487 | ret = -EINVAL; | |
2488 | goto out; | |
2489 | } | |
2490 | } | |
2491 | ||
2492 | for (i = 0; i < num_eps; i++) { | |
2493 | index = dummy_get_ep_idx(&eps[i]->desc); | |
2494 | dum_hcd->stream_en_ep &= ~(1 << index); | |
2495 | set_max_streams_for_pipe(dum_hcd, | |
2496 | usb_endpoint_num(&eps[i]->desc), 0); | |
2497 | } | |
2498 | ret = 0; | |
2499 | out: | |
2500 | spin_unlock_irqrestore(&dum_hcd->dum->lock, flags); | |
2501 | return ret; | |
1cd8fd28 TB |
2502 | } |
2503 | ||
2504 | static struct hc_driver dummy_hcd = { | |
1da177e4 LT |
2505 | .description = (char *) driver_name, |
2506 | .product_desc = "Dummy host controller", | |
cdfcbd2c | 2507 | .hcd_priv_size = sizeof(struct dummy_hcd), |
1da177e4 | 2508 | |
1cd8fd28 | 2509 | .flags = HCD_USB3 | HCD_SHARED, |
1da177e4 | 2510 | |
cdfcbd2c | 2511 | .reset = dummy_setup, |
1da177e4 LT |
2512 | .start = dummy_start, |
2513 | .stop = dummy_stop, | |
2514 | ||
18f2cbaa SAS |
2515 | .urb_enqueue = dummy_urb_enqueue, |
2516 | .urb_dequeue = dummy_urb_dequeue, | |
1da177e4 | 2517 | |
18f2cbaa | 2518 | .get_frame_number = dummy_h_get_frame, |
1da177e4 | 2519 | |
18f2cbaa SAS |
2520 | .hub_status_data = dummy_hub_status, |
2521 | .hub_control = dummy_hub_control, | |
0c0382e3 AS |
2522 | .bus_suspend = dummy_bus_suspend, |
2523 | .bus_resume = dummy_bus_resume, | |
1cd8fd28 TB |
2524 | |
2525 | .alloc_streams = dummy_alloc_streams, | |
2526 | .free_streams = dummy_free_streams, | |
1da177e4 LT |
2527 | }; |
2528 | ||
8364d6b0 | 2529 | static int dummy_hcd_probe(struct platform_device *pdev) |
1da177e4 | 2530 | { |
cdfcbd2c | 2531 | struct usb_hcd *hs_hcd; |
1cd8fd28 | 2532 | struct usb_hcd *ss_hcd; |
1da177e4 LT |
2533 | int retval; |
2534 | ||
8364d6b0 | 2535 | dev_info(&pdev->dev, "%s, driver " DRIVER_VERSION "\n", driver_desc); |
1da177e4 | 2536 | |
1cd8fd28 TB |
2537 | if (!mod_data.is_super_speed) |
2538 | dummy_hcd.flags = HCD_USB2; | |
cdfcbd2c TB |
2539 | hs_hcd = usb_create_hcd(&dummy_hcd, &pdev->dev, dev_name(&pdev->dev)); |
2540 | if (!hs_hcd) | |
1da177e4 | 2541 | return -ENOMEM; |
cdfcbd2c | 2542 | hs_hcd->has_tt = 1; |
1da177e4 | 2543 | |
cdfcbd2c | 2544 | retval = usb_add_hcd(hs_hcd, 0, 0); |
1b68a4ca SAS |
2545 | if (retval) |
2546 | goto put_usb2_hcd; | |
1cd8fd28 TB |
2547 | |
2548 | if (mod_data.is_super_speed) { | |
2549 | ss_hcd = usb_create_shared_hcd(&dummy_hcd, &pdev->dev, | |
2550 | dev_name(&pdev->dev), hs_hcd); | |
2551 | if (!ss_hcd) { | |
2552 | retval = -ENOMEM; | |
2553 | goto dealloc_usb2_hcd; | |
2554 | } | |
2555 | ||
2556 | retval = usb_add_hcd(ss_hcd, 0, 0); | |
2557 | if (retval) | |
2558 | goto put_usb3_hcd; | |
2559 | } | |
2560 | return 0; | |
2561 | ||
2562 | put_usb3_hcd: | |
2563 | usb_put_hcd(ss_hcd); | |
2564 | dealloc_usb2_hcd: | |
1b68a4ca SAS |
2565 | usb_remove_hcd(hs_hcd); |
2566 | put_usb2_hcd: | |
1cd8fd28 TB |
2567 | usb_put_hcd(hs_hcd); |
2568 | the_controller.hs_hcd = the_controller.ss_hcd = NULL; | |
1da177e4 LT |
2569 | return retval; |
2570 | } | |
2571 | ||
cdfcbd2c | 2572 | static int dummy_hcd_remove(struct platform_device *pdev) |
1da177e4 | 2573 | { |
cdfcbd2c TB |
2574 | struct dummy *dum; |
2575 | ||
18f2cbaa | 2576 | dum = hcd_to_dummy_hcd(platform_get_drvdata(pdev))->dum; |
1cd8fd28 TB |
2577 | |
2578 | if (dum->ss_hcd) { | |
2579 | usb_remove_hcd(dummy_hcd_to_hcd(dum->ss_hcd)); | |
2580 | usb_put_hcd(dummy_hcd_to_hcd(dum->ss_hcd)); | |
2581 | } | |
2582 | ||
cdfcbd2c TB |
2583 | usb_remove_hcd(dummy_hcd_to_hcd(dum->hs_hcd)); |
2584 | usb_put_hcd(dummy_hcd_to_hcd(dum->hs_hcd)); | |
1cd8fd28 | 2585 | |
cdfcbd2c | 2586 | the_controller.hs_hcd = NULL; |
1cd8fd28 | 2587 | the_controller.ss_hcd = NULL; |
1da177e4 | 2588 | |
d9b76251 | 2589 | return 0; |
1da177e4 LT |
2590 | } |
2591 | ||
18f2cbaa | 2592 | static int dummy_hcd_suspend(struct platform_device *pdev, pm_message_t state) |
391eca9d AS |
2593 | { |
2594 | struct usb_hcd *hcd; | |
cdfcbd2c | 2595 | struct dummy_hcd *dum_hcd; |
3cf0a22e | 2596 | int rc = 0; |
391eca9d | 2597 | |
18f2cbaa | 2598 | dev_dbg(&pdev->dev, "%s\n", __func__); |
391eca9d | 2599 | |
18f2cbaa | 2600 | hcd = platform_get_drvdata(pdev); |
cdfcbd2c TB |
2601 | dum_hcd = hcd_to_dummy_hcd(hcd); |
2602 | if (dum_hcd->rh_state == DUMMY_RH_RUNNING) { | |
3cf0a22e AS |
2603 | dev_warn(&pdev->dev, "Root hub isn't suspended!\n"); |
2604 | rc = -EBUSY; | |
2605 | } else | |
2606 | clear_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags); | |
2607 | return rc; | |
391eca9d AS |
2608 | } |
2609 | ||
18f2cbaa | 2610 | static int dummy_hcd_resume(struct platform_device *pdev) |
391eca9d AS |
2611 | { |
2612 | struct usb_hcd *hcd; | |
2613 | ||
18f2cbaa | 2614 | dev_dbg(&pdev->dev, "%s\n", __func__); |
391eca9d | 2615 | |
18f2cbaa | 2616 | hcd = platform_get_drvdata(pdev); |
3cf0a22e | 2617 | set_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags); |
18f2cbaa | 2618 | usb_hcd_poll_rh_status(hcd); |
391eca9d AS |
2619 | return 0; |
2620 | } | |
2621 | ||
3ae5eaec | 2622 | static struct platform_driver dummy_hcd_driver = { |
d9b76251 AS |
2623 | .probe = dummy_hcd_probe, |
2624 | .remove = dummy_hcd_remove, | |
391eca9d AS |
2625 | .suspend = dummy_hcd_suspend, |
2626 | .resume = dummy_hcd_resume, | |
3ae5eaec RK |
2627 | .driver = { |
2628 | .name = (char *) driver_name, | |
2629 | .owner = THIS_MODULE, | |
2630 | }, | |
d9b76251 | 2631 | }; |
1da177e4 | 2632 | |
d9b76251 | 2633 | /*-------------------------------------------------------------------------*/ |
b2113136 SAS |
2634 | #define MAX_NUM_UDC 1 |
2635 | static struct platform_device *the_udc_pdev[MAX_NUM_UDC]; | |
2636 | static struct platform_device *the_hcd_pdev[MAX_NUM_UDC]; | |
1da177e4 | 2637 | |
18f2cbaa | 2638 | static int __init init(void) |
1da177e4 | 2639 | { |
a89a2cd3 | 2640 | int retval = -ENOMEM; |
c7a1db45 | 2641 | int i; |
1da177e4 | 2642 | |
18f2cbaa | 2643 | if (usb_disabled()) |
1da177e4 | 2644 | return -ENODEV; |
d9b76251 | 2645 | |
7eca4c5a TB |
2646 | if (!mod_data.is_high_speed && mod_data.is_super_speed) |
2647 | return -EINVAL; | |
2648 | ||
c7a1db45 SAS |
2649 | if (mod_data.num < 1 || mod_data.num > MAX_NUM_UDC) { |
2650 | pr_err("Number of emulated UDC must be in range of 1…%d\n", | |
2651 | MAX_NUM_UDC); | |
2652 | return -EINVAL; | |
2653 | } | |
2654 | for (i = 0; i < mod_data.num; i++) { | |
2655 | the_hcd_pdev[i] = platform_device_alloc(driver_name, i); | |
2656 | if (!the_hcd_pdev[i]) { | |
2657 | i--; | |
2658 | while (i >= 0) | |
2659 | platform_device_put(the_hcd_pdev[i--]); | |
2660 | return retval; | |
2661 | } | |
2662 | } | |
2663 | for (i = 0; i < mod_data.num; i++) { | |
2664 | the_udc_pdev[i] = platform_device_alloc(gadget_name, i); | |
2665 | if (!the_udc_pdev[i]) { | |
2666 | i--; | |
2667 | while (i >= 0) | |
2668 | platform_device_put(the_udc_pdev[i--]); | |
2669 | goto err_alloc_udc; | |
2670 | } | |
2671 | } | |
d9b76251 | 2672 | |
a89a2cd3 AS |
2673 | retval = platform_driver_register(&dummy_hcd_driver); |
2674 | if (retval < 0) | |
2675 | goto err_register_hcd_driver; | |
2676 | retval = platform_driver_register(&dummy_udc_driver); | |
d9b76251 AS |
2677 | if (retval < 0) |
2678 | goto err_register_udc_driver; | |
2679 | ||
c7a1db45 SAS |
2680 | for (i = 0; i < mod_data.num; i++) { |
2681 | retval = platform_device_add(the_hcd_pdev[i]); | |
2682 | if (retval < 0) { | |
2683 | i--; | |
2684 | while (i >= 0) | |
2685 | platform_device_del(the_hcd_pdev[i--]); | |
2686 | goto err_add_hcd; | |
2687 | } | |
2688 | } | |
1cd8fd28 TB |
2689 | if (!the_controller.hs_hcd || |
2690 | (!the_controller.ss_hcd && mod_data.is_super_speed)) { | |
865835fa SAS |
2691 | /* |
2692 | * The hcd was added successfully but its probe function failed | |
2693 | * for some reason. | |
2694 | */ | |
2695 | retval = -EINVAL; | |
2696 | goto err_add_udc; | |
2697 | } | |
c7a1db45 SAS |
2698 | |
2699 | ||
2700 | for (i = 0; i < mod_data.num; i++) { | |
2701 | retval = platform_device_add(the_udc_pdev[i]); | |
2702 | if (retval < 0) { | |
2703 | i--; | |
2704 | while (i >= 0) | |
2705 | platform_device_del(the_udc_pdev[i]); | |
2706 | goto err_add_udc; | |
2707 | } | |
2708 | } | |
2709 | ||
2710 | for (i = 0; i < mod_data.num; i++) { | |
2711 | if (!platform_get_drvdata(the_udc_pdev[i])) { | |
2712 | /* | |
2713 | * The udc was added successfully but its probe | |
2714 | * function failed for some reason. | |
2715 | */ | |
2716 | retval = -EINVAL; | |
2717 | goto err_probe_udc; | |
2718 | } | |
865835fa | 2719 | } |
d9b76251 AS |
2720 | return retval; |
2721 | ||
865835fa | 2722 | err_probe_udc: |
c7a1db45 SAS |
2723 | for (i = 0; i < mod_data.num; i++) |
2724 | platform_device_del(the_udc_pdev[i]); | |
a89a2cd3 | 2725 | err_add_udc: |
c7a1db45 SAS |
2726 | for (i = 0; i < mod_data.num; i++) |
2727 | platform_device_del(the_hcd_pdev[i]); | |
a89a2cd3 AS |
2728 | err_add_hcd: |
2729 | platform_driver_unregister(&dummy_udc_driver); | |
d9b76251 | 2730 | err_register_udc_driver: |
a89a2cd3 AS |
2731 | platform_driver_unregister(&dummy_hcd_driver); |
2732 | err_register_hcd_driver: | |
c7a1db45 SAS |
2733 | for (i = 0; i < mod_data.num; i++) |
2734 | platform_device_put(the_udc_pdev[i]); | |
a89a2cd3 | 2735 | err_alloc_udc: |
c7a1db45 SAS |
2736 | for (i = 0; i < mod_data.num; i++) |
2737 | platform_device_put(the_hcd_pdev[i]); | |
1da177e4 LT |
2738 | return retval; |
2739 | } | |
18f2cbaa | 2740 | module_init(init); |
1da177e4 | 2741 | |
18f2cbaa | 2742 | static void __exit cleanup(void) |
1da177e4 | 2743 | { |
c7a1db45 SAS |
2744 | int i; |
2745 | ||
2746 | for (i = 0; i < mod_data.num; i++) { | |
2747 | platform_device_unregister(the_udc_pdev[i]); | |
2748 | platform_device_unregister(the_hcd_pdev[i]); | |
2749 | } | |
a89a2cd3 AS |
2750 | platform_driver_unregister(&dummy_udc_driver); |
2751 | platform_driver_unregister(&dummy_hcd_driver); | |
1da177e4 | 2752 | } |
18f2cbaa | 2753 | module_exit(cleanup); |