Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * dummy_hcd.c -- Dummy/Loopback USB host and device emulator driver. |
| 3 | * |
| 4 | * Maintainer: Alan Stern <stern@rowland.harvard.edu> |
| 5 | * |
| 6 | * Copyright (C) 2003 David Brownell |
| 7 | * Copyright (C) 2003-2005 Alan Stern |
| 8 | * |
| 9 | * This program is free software; you can redistribute it and/or modify |
| 10 | * it under the terms of the GNU General Public License as published by |
| 11 | * the Free Software Foundation; either version 2 of the License, or |
| 12 | * (at your option) any later version. |
| 13 | * |
| 14 | * This program is distributed in the hope that it will be useful, |
| 15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 17 | * GNU General Public License for more details. |
| 18 | * |
| 19 | * You should have received a copy of the GNU General Public License |
| 20 | * along with this program; if not, write to the Free Software |
| 21 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 22 | */ |
| 23 | |
| 24 | |
| 25 | /* |
| 26 | * This exposes a device side "USB gadget" API, driven by requests to a |
| 27 | * Linux-USB host controller driver. USB traffic is simulated; there's |
| 28 | * no need for USB hardware. Use this with two other drivers: |
| 29 | * |
| 30 | * - Gadget driver, responding to requests (slave); |
| 31 | * - Host-side device driver, as already familiar in Linux. |
| 32 | * |
| 33 | * Having this all in one kernel can help some stages of development, |
| 34 | * bypassing some hardware (and driver) issues. UML could help too. |
| 35 | */ |
| 36 | |
| 37 | #define DEBUG |
| 38 | |
| 39 | #include <linux/config.h> |
| 40 | #include <linux/module.h> |
| 41 | #include <linux/kernel.h> |
| 42 | #include <linux/delay.h> |
| 43 | #include <linux/ioport.h> |
| 44 | #include <linux/sched.h> |
| 45 | #include <linux/slab.h> |
| 46 | #include <linux/smp_lock.h> |
| 47 | #include <linux/errno.h> |
| 48 | #include <linux/init.h> |
| 49 | #include <linux/timer.h> |
| 50 | #include <linux/list.h> |
| 51 | #include <linux/interrupt.h> |
| 52 | #include <linux/version.h> |
| 53 | |
| 54 | #include <linux/usb.h> |
| 55 | #include <linux/usb_gadget.h> |
| 56 | |
| 57 | #include <asm/byteorder.h> |
| 58 | #include <asm/io.h> |
| 59 | #include <asm/irq.h> |
| 60 | #include <asm/system.h> |
| 61 | #include <asm/unaligned.h> |
| 62 | |
| 63 | |
| 64 | #include "../core/hcd.h" |
| 65 | |
| 66 | |
| 67 | #define DRIVER_DESC "USB Host+Gadget Emulator" |
| 68 | #define DRIVER_VERSION "17 Dec 2004" |
| 69 | |
| 70 | static const char driver_name [] = "dummy_hcd"; |
| 71 | static const char driver_desc [] = "USB Host+Gadget Emulator"; |
| 72 | |
| 73 | static const char gadget_name [] = "dummy_udc"; |
| 74 | |
| 75 | MODULE_DESCRIPTION (DRIVER_DESC); |
| 76 | MODULE_AUTHOR ("David Brownell"); |
| 77 | MODULE_LICENSE ("GPL"); |
| 78 | |
| 79 | /*-------------------------------------------------------------------------*/ |
| 80 | |
| 81 | /* gadget side driver data structres */ |
| 82 | struct dummy_ep { |
| 83 | struct list_head queue; |
| 84 | unsigned long last_io; /* jiffies timestamp */ |
| 85 | struct usb_gadget *gadget; |
| 86 | const struct usb_endpoint_descriptor *desc; |
| 87 | struct usb_ep ep; |
| 88 | unsigned halted : 1; |
| 89 | unsigned already_seen : 1; |
| 90 | unsigned setup_stage : 1; |
| 91 | }; |
| 92 | |
| 93 | struct dummy_request { |
| 94 | struct list_head queue; /* ep's requests */ |
| 95 | struct usb_request req; |
| 96 | }; |
| 97 | |
| 98 | static inline struct dummy_ep *usb_ep_to_dummy_ep (struct usb_ep *_ep) |
| 99 | { |
| 100 | return container_of (_ep, struct dummy_ep, ep); |
| 101 | } |
| 102 | |
| 103 | static inline struct dummy_request *usb_request_to_dummy_request |
| 104 | (struct usb_request *_req) |
| 105 | { |
| 106 | return container_of (_req, struct dummy_request, req); |
| 107 | } |
| 108 | |
| 109 | /*-------------------------------------------------------------------------*/ |
| 110 | |
| 111 | /* |
| 112 | * Every device has ep0 for control requests, plus up to 30 more endpoints, |
| 113 | * in one of two types: |
| 114 | * |
| 115 | * - Configurable: direction (in/out), type (bulk, iso, etc), and endpoint |
| 116 | * number can be changed. Names like "ep-a" are used for this type. |
| 117 | * |
| 118 | * - Fixed Function: in other cases. some characteristics may be mutable; |
| 119 | * that'd be hardware-specific. Names like "ep12out-bulk" are used. |
| 120 | * |
| 121 | * Gadget drivers are responsible for not setting up conflicting endpoint |
| 122 | * configurations, illegal or unsupported packet lengths, and so on. |
| 123 | */ |
| 124 | |
| 125 | static const char ep0name [] = "ep0"; |
| 126 | |
| 127 | static const char *const ep_name [] = { |
| 128 | ep0name, /* everyone has ep0 */ |
| 129 | |
| 130 | /* act like a net2280: high speed, six configurable endpoints */ |
| 131 | "ep-a", "ep-b", "ep-c", "ep-d", "ep-e", "ep-f", |
| 132 | |
| 133 | /* or like pxa250: fifteen fixed function endpoints */ |
| 134 | "ep1in-bulk", "ep2out-bulk", "ep3in-iso", "ep4out-iso", "ep5in-int", |
| 135 | "ep6in-bulk", "ep7out-bulk", "ep8in-iso", "ep9out-iso", "ep10in-int", |
| 136 | "ep11in-bulk", "ep12out-bulk", "ep13in-iso", "ep14out-iso", |
| 137 | "ep15in-int", |
| 138 | |
| 139 | /* or like sa1100: two fixed function endpoints */ |
| 140 | "ep1out-bulk", "ep2in-bulk", |
| 141 | }; |
| 142 | #define DUMMY_ENDPOINTS (sizeof(ep_name)/sizeof(char *)) |
| 143 | |
| 144 | #define FIFO_SIZE 64 |
| 145 | |
| 146 | struct urbp { |
| 147 | struct urb *urb; |
| 148 | struct list_head urbp_list; |
| 149 | }; |
| 150 | |
| 151 | struct dummy { |
| 152 | spinlock_t lock; |
| 153 | |
| 154 | /* |
| 155 | * SLAVE/GADGET side support |
| 156 | */ |
| 157 | struct dummy_ep ep [DUMMY_ENDPOINTS]; |
| 158 | int address; |
| 159 | struct usb_gadget gadget; |
| 160 | struct usb_gadget_driver *driver; |
| 161 | struct dummy_request fifo_req; |
| 162 | u8 fifo_buf [FIFO_SIZE]; |
| 163 | u16 devstatus; |
| 164 | |
| 165 | /* |
| 166 | * MASTER/HOST side support |
| 167 | */ |
| 168 | struct timer_list timer; |
| 169 | u32 port_status; |
| 170 | unsigned resuming:1; |
| 171 | unsigned long re_timeout; |
| 172 | |
| 173 | struct usb_device *udev; |
| 174 | struct list_head urbp_list; |
| 175 | }; |
| 176 | |
| 177 | static inline struct dummy *hcd_to_dummy (struct usb_hcd *hcd) |
| 178 | { |
| 179 | return (struct dummy *) (hcd->hcd_priv); |
| 180 | } |
| 181 | |
| 182 | static inline struct usb_hcd *dummy_to_hcd (struct dummy *dum) |
| 183 | { |
| 184 | return container_of((void *) dum, struct usb_hcd, hcd_priv); |
| 185 | } |
| 186 | |
| 187 | static inline struct device *dummy_dev (struct dummy *dum) |
| 188 | { |
| 189 | return dummy_to_hcd(dum)->self.controller; |
| 190 | } |
| 191 | |
| 192 | static inline struct dummy *ep_to_dummy (struct dummy_ep *ep) |
| 193 | { |
| 194 | return container_of (ep->gadget, struct dummy, gadget); |
| 195 | } |
| 196 | |
| 197 | static inline struct dummy *gadget_to_dummy (struct usb_gadget *gadget) |
| 198 | { |
| 199 | return container_of (gadget, struct dummy, gadget); |
| 200 | } |
| 201 | |
| 202 | static inline struct dummy *gadget_dev_to_dummy (struct device *dev) |
| 203 | { |
| 204 | return container_of (dev, struct dummy, gadget.dev); |
| 205 | } |
| 206 | |
| 207 | static struct dummy *the_controller; |
| 208 | |
| 209 | /*-------------------------------------------------------------------------*/ |
| 210 | |
| 211 | /* |
| 212 | * This "hardware" may look a bit odd in diagnostics since it's got both |
| 213 | * host and device sides; and it binds different drivers to each side. |
| 214 | */ |
| 215 | static struct platform_device the_pdev; |
| 216 | |
| 217 | static struct device_driver dummy_driver = { |
| 218 | .name = (char *) driver_name, |
| 219 | .bus = &platform_bus_type, |
| 220 | }; |
| 221 | |
| 222 | /*-------------------------------------------------------------------------*/ |
| 223 | |
| 224 | /* SLAVE/GADGET SIDE DRIVER |
| 225 | * |
| 226 | * This only tracks gadget state. All the work is done when the host |
| 227 | * side tries some (emulated) i/o operation. Real device controller |
| 228 | * drivers would do real i/o using dma, fifos, irqs, timers, etc. |
| 229 | */ |
| 230 | |
| 231 | #define is_enabled(dum) \ |
| 232 | (dum->port_status & USB_PORT_STAT_ENABLE) |
| 233 | |
| 234 | static int |
| 235 | dummy_enable (struct usb_ep *_ep, const struct usb_endpoint_descriptor *desc) |
| 236 | { |
| 237 | struct dummy *dum; |
| 238 | struct dummy_ep *ep; |
| 239 | unsigned max; |
| 240 | int retval; |
| 241 | |
| 242 | ep = usb_ep_to_dummy_ep (_ep); |
| 243 | if (!_ep || !desc || ep->desc || _ep->name == ep0name |
| 244 | || desc->bDescriptorType != USB_DT_ENDPOINT) |
| 245 | return -EINVAL; |
| 246 | dum = ep_to_dummy (ep); |
| 247 | if (!dum->driver || !is_enabled (dum)) |
| 248 | return -ESHUTDOWN; |
| 249 | max = le16_to_cpu(desc->wMaxPacketSize) & 0x3ff; |
| 250 | |
| 251 | /* drivers must not request bad settings, since lower levels |
| 252 | * (hardware or its drivers) may not check. some endpoints |
| 253 | * can't do iso, many have maxpacket limitations, etc. |
| 254 | * |
| 255 | * since this "hardware" driver is here to help debugging, we |
| 256 | * have some extra sanity checks. (there could be more though, |
| 257 | * especially for "ep9out" style fixed function ones.) |
| 258 | */ |
| 259 | retval = -EINVAL; |
| 260 | switch (desc->bmAttributes & 0x03) { |
| 261 | case USB_ENDPOINT_XFER_BULK: |
| 262 | if (strstr (ep->ep.name, "-iso") |
| 263 | || strstr (ep->ep.name, "-int")) { |
| 264 | goto done; |
| 265 | } |
| 266 | switch (dum->gadget.speed) { |
| 267 | case USB_SPEED_HIGH: |
| 268 | if (max == 512) |
| 269 | break; |
| 270 | /* conserve return statements */ |
| 271 | default: |
| 272 | switch (max) { |
| 273 | case 8: case 16: case 32: case 64: |
| 274 | /* we'll fake any legal size */ |
| 275 | break; |
| 276 | default: |
| 277 | case USB_SPEED_LOW: |
| 278 | goto done; |
| 279 | } |
| 280 | } |
| 281 | break; |
| 282 | case USB_ENDPOINT_XFER_INT: |
| 283 | if (strstr (ep->ep.name, "-iso")) /* bulk is ok */ |
| 284 | goto done; |
| 285 | /* real hardware might not handle all packet sizes */ |
| 286 | switch (dum->gadget.speed) { |
| 287 | case USB_SPEED_HIGH: |
| 288 | if (max <= 1024) |
| 289 | break; |
| 290 | /* save a return statement */ |
| 291 | case USB_SPEED_FULL: |
| 292 | if (max <= 64) |
| 293 | break; |
| 294 | /* save a return statement */ |
| 295 | default: |
| 296 | if (max <= 8) |
| 297 | break; |
| 298 | goto done; |
| 299 | } |
| 300 | break; |
| 301 | case USB_ENDPOINT_XFER_ISOC: |
| 302 | if (strstr (ep->ep.name, "-bulk") |
| 303 | || strstr (ep->ep.name, "-int")) |
| 304 | goto done; |
| 305 | /* real hardware might not handle all packet sizes */ |
| 306 | switch (dum->gadget.speed) { |
| 307 | case USB_SPEED_HIGH: |
| 308 | if (max <= 1024) |
| 309 | break; |
| 310 | /* save a return statement */ |
| 311 | case USB_SPEED_FULL: |
| 312 | if (max <= 1023) |
| 313 | break; |
| 314 | /* save a return statement */ |
| 315 | default: |
| 316 | goto done; |
| 317 | } |
| 318 | break; |
| 319 | default: |
| 320 | /* few chips support control except on ep0 */ |
| 321 | goto done; |
| 322 | } |
| 323 | |
| 324 | _ep->maxpacket = max; |
| 325 | ep->desc = desc; |
| 326 | |
| 327 | dev_dbg (dummy_dev(dum), "enabled %s (ep%d%s-%s) maxpacket %d\n", |
| 328 | _ep->name, |
| 329 | desc->bEndpointAddress & 0x0f, |
| 330 | (desc->bEndpointAddress & USB_DIR_IN) ? "in" : "out", |
| 331 | ({ char *val; |
| 332 | switch (desc->bmAttributes & 0x03) { |
| 333 | case USB_ENDPOINT_XFER_BULK: val = "bulk"; break; |
| 334 | case USB_ENDPOINT_XFER_ISOC: val = "iso"; break; |
| 335 | case USB_ENDPOINT_XFER_INT: val = "intr"; break; |
| 336 | default: val = "ctrl"; break; |
| 337 | }; val; }), |
| 338 | max); |
| 339 | |
| 340 | /* at this point real hardware should be NAKing transfers |
| 341 | * to that endpoint, until a buffer is queued to it. |
| 342 | */ |
| 343 | retval = 0; |
| 344 | done: |
| 345 | return retval; |
| 346 | } |
| 347 | |
| 348 | /* called with spinlock held */ |
| 349 | static void nuke (struct dummy *dum, struct dummy_ep *ep) |
| 350 | { |
| 351 | while (!list_empty (&ep->queue)) { |
| 352 | struct dummy_request *req; |
| 353 | |
| 354 | req = list_entry (ep->queue.next, struct dummy_request, queue); |
| 355 | list_del_init (&req->queue); |
| 356 | req->req.status = -ESHUTDOWN; |
| 357 | |
| 358 | spin_unlock (&dum->lock); |
| 359 | req->req.complete (&ep->ep, &req->req); |
| 360 | spin_lock (&dum->lock); |
| 361 | } |
| 362 | } |
| 363 | |
| 364 | static int dummy_disable (struct usb_ep *_ep) |
| 365 | { |
| 366 | struct dummy_ep *ep; |
| 367 | struct dummy *dum; |
| 368 | unsigned long flags; |
| 369 | int retval; |
| 370 | |
| 371 | ep = usb_ep_to_dummy_ep (_ep); |
| 372 | if (!_ep || !ep->desc || _ep->name == ep0name) |
| 373 | return -EINVAL; |
| 374 | dum = ep_to_dummy (ep); |
| 375 | |
| 376 | spin_lock_irqsave (&dum->lock, flags); |
| 377 | ep->desc = NULL; |
| 378 | retval = 0; |
| 379 | nuke (dum, ep); |
| 380 | spin_unlock_irqrestore (&dum->lock, flags); |
| 381 | |
| 382 | dev_dbg (dummy_dev(dum), "disabled %s\n", _ep->name); |
| 383 | return retval; |
| 384 | } |
| 385 | |
| 386 | static struct usb_request * |
| 387 | dummy_alloc_request (struct usb_ep *_ep, int mem_flags) |
| 388 | { |
| 389 | struct dummy_ep *ep; |
| 390 | struct dummy_request *req; |
| 391 | |
| 392 | if (!_ep) |
| 393 | return NULL; |
| 394 | ep = usb_ep_to_dummy_ep (_ep); |
| 395 | |
| 396 | req = kmalloc (sizeof *req, mem_flags); |
| 397 | if (!req) |
| 398 | return NULL; |
| 399 | memset (req, 0, sizeof *req); |
| 400 | INIT_LIST_HEAD (&req->queue); |
| 401 | return &req->req; |
| 402 | } |
| 403 | |
| 404 | static void |
| 405 | dummy_free_request (struct usb_ep *_ep, struct usb_request *_req) |
| 406 | { |
| 407 | struct dummy_ep *ep; |
| 408 | struct dummy_request *req; |
| 409 | |
| 410 | ep = usb_ep_to_dummy_ep (_ep); |
| 411 | if (!ep || !_req || (!ep->desc && _ep->name != ep0name)) |
| 412 | return; |
| 413 | |
| 414 | req = usb_request_to_dummy_request (_req); |
| 415 | WARN_ON (!list_empty (&req->queue)); |
| 416 | kfree (req); |
| 417 | } |
| 418 | |
| 419 | static void * |
| 420 | dummy_alloc_buffer ( |
| 421 | struct usb_ep *_ep, |
| 422 | unsigned bytes, |
| 423 | dma_addr_t *dma, |
| 424 | int mem_flags |
| 425 | ) { |
| 426 | char *retval; |
| 427 | struct dummy_ep *ep; |
| 428 | struct dummy *dum; |
| 429 | |
| 430 | ep = usb_ep_to_dummy_ep (_ep); |
| 431 | dum = ep_to_dummy (ep); |
| 432 | |
| 433 | if (!dum->driver) |
| 434 | return NULL; |
| 435 | retval = kmalloc (bytes, mem_flags); |
| 436 | *dma = (dma_addr_t) retval; |
| 437 | return retval; |
| 438 | } |
| 439 | |
| 440 | static void |
| 441 | dummy_free_buffer ( |
| 442 | struct usb_ep *_ep, |
| 443 | void *buf, |
| 444 | dma_addr_t dma, |
| 445 | unsigned bytes |
| 446 | ) { |
| 447 | if (bytes) |
| 448 | kfree (buf); |
| 449 | } |
| 450 | |
| 451 | static void |
| 452 | fifo_complete (struct usb_ep *ep, struct usb_request *req) |
| 453 | { |
| 454 | } |
| 455 | |
| 456 | static int |
| 457 | dummy_queue (struct usb_ep *_ep, struct usb_request *_req, int mem_flags) |
| 458 | { |
| 459 | struct dummy_ep *ep; |
| 460 | struct dummy_request *req; |
| 461 | struct dummy *dum; |
| 462 | unsigned long flags; |
| 463 | |
| 464 | req = usb_request_to_dummy_request (_req); |
| 465 | if (!_req || !list_empty (&req->queue) || !_req->complete) |
| 466 | return -EINVAL; |
| 467 | |
| 468 | ep = usb_ep_to_dummy_ep (_ep); |
| 469 | if (!_ep || (!ep->desc && _ep->name != ep0name)) |
| 470 | return -EINVAL; |
| 471 | |
| 472 | dum = ep_to_dummy (ep); |
| 473 | if (!dum->driver || !is_enabled (dum)) |
| 474 | return -ESHUTDOWN; |
| 475 | |
| 476 | #if 0 |
| 477 | dev_dbg (dummy_dev(dum), "ep %p queue req %p to %s, len %d buf %p\n", |
| 478 | ep, _req, _ep->name, _req->length, _req->buf); |
| 479 | #endif |
| 480 | |
| 481 | _req->status = -EINPROGRESS; |
| 482 | _req->actual = 0; |
| 483 | spin_lock_irqsave (&dum->lock, flags); |
| 484 | |
| 485 | /* implement an emulated single-request FIFO */ |
| 486 | if (ep->desc && (ep->desc->bEndpointAddress & USB_DIR_IN) && |
| 487 | list_empty (&dum->fifo_req.queue) && |
| 488 | list_empty (&ep->queue) && |
| 489 | _req->length <= FIFO_SIZE) { |
| 490 | req = &dum->fifo_req; |
| 491 | req->req = *_req; |
| 492 | req->req.buf = dum->fifo_buf; |
| 493 | memcpy (dum->fifo_buf, _req->buf, _req->length); |
| 494 | req->req.context = dum; |
| 495 | req->req.complete = fifo_complete; |
| 496 | |
| 497 | spin_unlock (&dum->lock); |
| 498 | _req->actual = _req->length; |
| 499 | _req->status = 0; |
| 500 | _req->complete (_ep, _req); |
| 501 | spin_lock (&dum->lock); |
| 502 | } |
| 503 | list_add_tail (&req->queue, &ep->queue); |
| 504 | spin_unlock_irqrestore (&dum->lock, flags); |
| 505 | |
| 506 | /* real hardware would likely enable transfers here, in case |
| 507 | * it'd been left NAKing. |
| 508 | */ |
| 509 | return 0; |
| 510 | } |
| 511 | |
| 512 | static int dummy_dequeue (struct usb_ep *_ep, struct usb_request *_req) |
| 513 | { |
| 514 | struct dummy_ep *ep; |
| 515 | struct dummy *dum; |
| 516 | int retval = -EINVAL; |
| 517 | unsigned long flags; |
| 518 | struct dummy_request *req = NULL; |
| 519 | |
| 520 | if (!_ep || !_req) |
| 521 | return retval; |
| 522 | ep = usb_ep_to_dummy_ep (_ep); |
| 523 | dum = ep_to_dummy (ep); |
| 524 | |
| 525 | if (!dum->driver) |
| 526 | return -ESHUTDOWN; |
| 527 | |
| 528 | spin_lock_irqsave (&dum->lock, flags); |
| 529 | list_for_each_entry (req, &ep->queue, queue) { |
| 530 | if (&req->req == _req) { |
| 531 | list_del_init (&req->queue); |
| 532 | _req->status = -ECONNRESET; |
| 533 | retval = 0; |
| 534 | break; |
| 535 | } |
| 536 | } |
| 537 | spin_unlock_irqrestore (&dum->lock, flags); |
| 538 | |
| 539 | if (retval == 0) { |
| 540 | dev_dbg (dummy_dev(dum), |
| 541 | "dequeued req %p from %s, len %d buf %p\n", |
| 542 | req, _ep->name, _req->length, _req->buf); |
| 543 | _req->complete (_ep, _req); |
| 544 | } |
| 545 | return retval; |
| 546 | } |
| 547 | |
| 548 | static int |
| 549 | dummy_set_halt (struct usb_ep *_ep, int value) |
| 550 | { |
| 551 | struct dummy_ep *ep; |
| 552 | struct dummy *dum; |
| 553 | |
| 554 | if (!_ep) |
| 555 | return -EINVAL; |
| 556 | ep = usb_ep_to_dummy_ep (_ep); |
| 557 | dum = ep_to_dummy (ep); |
| 558 | if (!dum->driver) |
| 559 | return -ESHUTDOWN; |
| 560 | if (!value) |
| 561 | ep->halted = 0; |
| 562 | else if (ep->desc && (ep->desc->bEndpointAddress & USB_DIR_IN) && |
| 563 | !list_empty (&ep->queue)) |
| 564 | return -EAGAIN; |
| 565 | else |
| 566 | ep->halted = 1; |
| 567 | /* FIXME clear emulated data toggle too */ |
| 568 | return 0; |
| 569 | } |
| 570 | |
| 571 | static const struct usb_ep_ops dummy_ep_ops = { |
| 572 | .enable = dummy_enable, |
| 573 | .disable = dummy_disable, |
| 574 | |
| 575 | .alloc_request = dummy_alloc_request, |
| 576 | .free_request = dummy_free_request, |
| 577 | |
| 578 | .alloc_buffer = dummy_alloc_buffer, |
| 579 | .free_buffer = dummy_free_buffer, |
| 580 | /* map, unmap, ... eventually hook the "generic" dma calls */ |
| 581 | |
| 582 | .queue = dummy_queue, |
| 583 | .dequeue = dummy_dequeue, |
| 584 | |
| 585 | .set_halt = dummy_set_halt, |
| 586 | }; |
| 587 | |
| 588 | /*-------------------------------------------------------------------------*/ |
| 589 | |
| 590 | /* there are both host and device side versions of this call ... */ |
| 591 | static int dummy_g_get_frame (struct usb_gadget *_gadget) |
| 592 | { |
| 593 | struct timeval tv; |
| 594 | |
| 595 | do_gettimeofday (&tv); |
| 596 | return tv.tv_usec / 1000; |
| 597 | } |
| 598 | |
| 599 | static int dummy_wakeup (struct usb_gadget *_gadget) |
| 600 | { |
| 601 | struct dummy *dum; |
| 602 | |
| 603 | dum = gadget_to_dummy (_gadget); |
| 604 | if ((dum->devstatus & (1 << USB_DEVICE_REMOTE_WAKEUP)) == 0 |
| 605 | || !(dum->port_status & (1 << USB_PORT_FEAT_SUSPEND))) |
| 606 | return -EINVAL; |
| 607 | |
| 608 | /* hub notices our request, issues downstream resume, etc */ |
| 609 | dum->resuming = 1; |
| 610 | dum->port_status |= (1 << USB_PORT_FEAT_C_SUSPEND); |
| 611 | return 0; |
| 612 | } |
| 613 | |
| 614 | static int dummy_set_selfpowered (struct usb_gadget *_gadget, int value) |
| 615 | { |
| 616 | struct dummy *dum; |
| 617 | |
| 618 | dum = gadget_to_dummy (_gadget); |
| 619 | if (value) |
| 620 | dum->devstatus |= (1 << USB_DEVICE_SELF_POWERED); |
| 621 | else |
| 622 | dum->devstatus &= ~(1 << USB_DEVICE_SELF_POWERED); |
| 623 | return 0; |
| 624 | } |
| 625 | |
| 626 | static const struct usb_gadget_ops dummy_ops = { |
| 627 | .get_frame = dummy_g_get_frame, |
| 628 | .wakeup = dummy_wakeup, |
| 629 | .set_selfpowered = dummy_set_selfpowered, |
| 630 | }; |
| 631 | |
| 632 | /*-------------------------------------------------------------------------*/ |
| 633 | |
| 634 | /* "function" sysfs attribute */ |
| 635 | static ssize_t |
| 636 | show_function (struct device *dev, char *buf) |
| 637 | { |
| 638 | struct dummy *dum = gadget_dev_to_dummy (dev); |
| 639 | |
| 640 | if (!dum->driver || !dum->driver->function) |
| 641 | return 0; |
| 642 | return scnprintf (buf, PAGE_SIZE, "%s\n", dum->driver->function); |
| 643 | } |
| 644 | DEVICE_ATTR (function, S_IRUGO, show_function, NULL); |
| 645 | |
| 646 | /*-------------------------------------------------------------------------*/ |
| 647 | |
| 648 | /* |
| 649 | * Driver registration/unregistration. |
| 650 | * |
| 651 | * This is basically hardware-specific; there's usually only one real USB |
| 652 | * device (not host) controller since that's how USB devices are intended |
| 653 | * to work. So most implementations of these api calls will rely on the |
| 654 | * fact that only one driver will ever bind to the hardware. But curious |
| 655 | * hardware can be built with discrete components, so the gadget API doesn't |
| 656 | * require that assumption. |
| 657 | * |
| 658 | * For this emulator, it might be convenient to create a usb slave device |
| 659 | * for each driver that registers: just add to a big root hub. |
| 660 | */ |
| 661 | |
| 662 | static void |
| 663 | dummy_udc_release (struct device *dev) |
| 664 | { |
| 665 | } |
| 666 | |
| 667 | static void |
| 668 | dummy_pdev_release (struct device *dev) |
| 669 | { |
| 670 | } |
| 671 | |
| 672 | static int |
| 673 | dummy_register_udc (struct dummy *dum) |
| 674 | { |
| 675 | int rc; |
| 676 | |
| 677 | strcpy (dum->gadget.dev.bus_id, "udc"); |
| 678 | dum->gadget.dev.parent = dummy_dev(dum); |
| 679 | dum->gadget.dev.release = dummy_udc_release; |
| 680 | |
| 681 | rc = device_register (&dum->gadget.dev); |
| 682 | if (rc == 0) |
| 683 | device_create_file (&dum->gadget.dev, &dev_attr_function); |
| 684 | return rc; |
| 685 | } |
| 686 | |
| 687 | static void |
| 688 | dummy_unregister_udc (struct dummy *dum) |
| 689 | { |
| 690 | device_remove_file (&dum->gadget.dev, &dev_attr_function); |
| 691 | device_unregister (&dum->gadget.dev); |
| 692 | } |
| 693 | |
| 694 | int |
| 695 | usb_gadget_register_driver (struct usb_gadget_driver *driver) |
| 696 | { |
| 697 | struct dummy *dum = the_controller; |
| 698 | int retval, i; |
| 699 | |
| 700 | if (!dum) |
| 701 | return -EINVAL; |
| 702 | if (dum->driver) |
| 703 | return -EBUSY; |
| 704 | if (!driver->bind || !driver->unbind || !driver->setup |
| 705 | || driver->speed == USB_SPEED_UNKNOWN) |
| 706 | return -EINVAL; |
| 707 | |
| 708 | /* |
| 709 | * SLAVE side init ... the layer above hardware, which |
| 710 | * can't enumerate without help from the driver we're binding. |
| 711 | */ |
| 712 | dum->gadget.name = gadget_name; |
| 713 | dum->gadget.ops = &dummy_ops; |
| 714 | dum->gadget.is_dualspeed = 1; |
| 715 | |
| 716 | dum->devstatus = 0; |
| 717 | dum->resuming = 0; |
| 718 | |
| 719 | INIT_LIST_HEAD (&dum->gadget.ep_list); |
| 720 | for (i = 0; i < DUMMY_ENDPOINTS; i++) { |
| 721 | struct dummy_ep *ep = &dum->ep [i]; |
| 722 | |
| 723 | if (!ep_name [i]) |
| 724 | break; |
| 725 | ep->ep.name = ep_name [i]; |
| 726 | ep->ep.ops = &dummy_ep_ops; |
| 727 | list_add_tail (&ep->ep.ep_list, &dum->gadget.ep_list); |
| 728 | ep->halted = ep->already_seen = ep->setup_stage = 0; |
| 729 | ep->ep.maxpacket = ~0; |
| 730 | ep->last_io = jiffies; |
| 731 | ep->gadget = &dum->gadget; |
| 732 | ep->desc = NULL; |
| 733 | INIT_LIST_HEAD (&ep->queue); |
| 734 | } |
| 735 | |
| 736 | dum->gadget.ep0 = &dum->ep [0].ep; |
| 737 | dum->ep [0].ep.maxpacket = 64; |
| 738 | list_del_init (&dum->ep [0].ep.ep_list); |
| 739 | INIT_LIST_HEAD(&dum->fifo_req.queue); |
| 740 | |
| 741 | dum->driver = driver; |
| 742 | dum->gadget.dev.driver = &driver->driver; |
| 743 | dev_dbg (dummy_dev(dum), "binding gadget driver '%s'\n", |
| 744 | driver->driver.name); |
| 745 | if ((retval = driver->bind (&dum->gadget)) != 0) { |
| 746 | dum->driver = NULL; |
| 747 | dum->gadget.dev.driver = NULL; |
| 748 | return retval; |
| 749 | } |
| 750 | |
| 751 | // FIXME: Check these calls for errors and re-order |
| 752 | driver->driver.bus = dum->gadget.dev.parent->bus; |
| 753 | driver_register (&driver->driver); |
| 754 | |
| 755 | device_bind_driver (&dum->gadget.dev); |
| 756 | |
| 757 | /* khubd will enumerate this in a while */ |
| 758 | dum->port_status |= USB_PORT_STAT_CONNECTION |
| 759 | | (1 << USB_PORT_FEAT_C_CONNECTION); |
| 760 | return 0; |
| 761 | } |
| 762 | EXPORT_SYMBOL (usb_gadget_register_driver); |
| 763 | |
| 764 | /* caller must hold lock */ |
| 765 | static void |
| 766 | stop_activity (struct dummy *dum, struct usb_gadget_driver *driver) |
| 767 | { |
| 768 | struct dummy_ep *ep; |
| 769 | |
| 770 | /* prevent any more requests */ |
| 771 | dum->address = 0; |
| 772 | |
| 773 | /* The timer is left running so that outstanding URBs can fail */ |
| 774 | |
| 775 | /* nuke any pending requests first, so driver i/o is quiesced */ |
| 776 | list_for_each_entry (ep, &dum->gadget.ep_list, ep.ep_list) |
| 777 | nuke (dum, ep); |
| 778 | |
| 779 | /* driver now does any non-usb quiescing necessary */ |
| 780 | if (driver) { |
| 781 | spin_unlock (&dum->lock); |
| 782 | driver->disconnect (&dum->gadget); |
| 783 | spin_lock (&dum->lock); |
| 784 | } |
| 785 | } |
| 786 | |
| 787 | int |
| 788 | usb_gadget_unregister_driver (struct usb_gadget_driver *driver) |
| 789 | { |
| 790 | struct dummy *dum = the_controller; |
| 791 | unsigned long flags; |
| 792 | |
| 793 | if (!dum) |
| 794 | return -ENODEV; |
| 795 | if (!driver || driver != dum->driver) |
| 796 | return -EINVAL; |
| 797 | |
| 798 | dev_dbg (dummy_dev(dum), "unregister gadget driver '%s'\n", |
| 799 | driver->driver.name); |
| 800 | |
| 801 | spin_lock_irqsave (&dum->lock, flags); |
| 802 | stop_activity (dum, driver); |
| 803 | dum->port_status &= ~(USB_PORT_STAT_CONNECTION | USB_PORT_STAT_ENABLE | |
| 804 | USB_PORT_STAT_LOW_SPEED | USB_PORT_STAT_HIGH_SPEED); |
| 805 | dum->port_status |= (1 << USB_PORT_FEAT_C_CONNECTION); |
| 806 | spin_unlock_irqrestore (&dum->lock, flags); |
| 807 | |
| 808 | driver->unbind (&dum->gadget); |
| 809 | dum->driver = NULL; |
| 810 | |
| 811 | device_release_driver (&dum->gadget.dev); |
| 812 | |
| 813 | driver_unregister (&driver->driver); |
| 814 | |
| 815 | return 0; |
| 816 | } |
| 817 | EXPORT_SYMBOL (usb_gadget_unregister_driver); |
| 818 | |
| 819 | #undef is_enabled |
| 820 | |
| 821 | int net2280_set_fifo_mode (struct usb_gadget *gadget, int mode) |
| 822 | { |
| 823 | return -ENOSYS; |
| 824 | } |
| 825 | EXPORT_SYMBOL (net2280_set_fifo_mode); |
| 826 | |
| 827 | /*-------------------------------------------------------------------------*/ |
| 828 | |
| 829 | /* MASTER/HOST SIDE DRIVER |
| 830 | * |
| 831 | * this uses the hcd framework to hook up to host side drivers. |
| 832 | * its root hub will only have one device, otherwise it acts like |
| 833 | * a normal host controller. |
| 834 | * |
| 835 | * when urbs are queued, they're just stuck on a list that we |
| 836 | * scan in a timer callback. that callback connects writes from |
| 837 | * the host with reads from the device, and so on, based on the |
| 838 | * usb 2.0 rules. |
| 839 | */ |
| 840 | |
| 841 | static int dummy_urb_enqueue ( |
| 842 | struct usb_hcd *hcd, |
| 843 | struct usb_host_endpoint *ep, |
| 844 | struct urb *urb, |
| 845 | int mem_flags |
| 846 | ) { |
| 847 | struct dummy *dum; |
| 848 | struct urbp *urbp; |
| 849 | unsigned long flags; |
| 850 | |
| 851 | if (!urb->transfer_buffer && urb->transfer_buffer_length) |
| 852 | return -EINVAL; |
| 853 | |
| 854 | urbp = kmalloc (sizeof *urbp, mem_flags); |
| 855 | if (!urbp) |
| 856 | return -ENOMEM; |
| 857 | urbp->urb = urb; |
| 858 | |
| 859 | dum = hcd_to_dummy (hcd); |
| 860 | spin_lock_irqsave (&dum->lock, flags); |
| 861 | |
| 862 | if (!dum->udev) { |
| 863 | dum->udev = urb->dev; |
| 864 | usb_get_dev (dum->udev); |
| 865 | } else if (unlikely (dum->udev != urb->dev)) |
| 866 | dev_err (dummy_dev(dum), "usb_device address has changed!\n"); |
| 867 | |
| 868 | list_add_tail (&urbp->urbp_list, &dum->urbp_list); |
| 869 | urb->hcpriv = urbp; |
| 870 | if (usb_pipetype (urb->pipe) == PIPE_CONTROL) |
| 871 | urb->error_count = 1; /* mark as a new urb */ |
| 872 | |
| 873 | /* kick the scheduler, it'll do the rest */ |
| 874 | if (!timer_pending (&dum->timer)) |
| 875 | mod_timer (&dum->timer, jiffies + 1); |
| 876 | |
| 877 | spin_unlock_irqrestore (&dum->lock, flags); |
| 878 | return 0; |
| 879 | } |
| 880 | |
| 881 | static int dummy_urb_dequeue (struct usb_hcd *hcd, struct urb *urb) |
| 882 | { |
| 883 | /* giveback happens automatically in timer callback */ |
| 884 | return 0; |
| 885 | } |
| 886 | |
| 887 | static void maybe_set_status (struct urb *urb, int status) |
| 888 | { |
| 889 | spin_lock (&urb->lock); |
| 890 | if (urb->status == -EINPROGRESS) |
| 891 | urb->status = status; |
| 892 | spin_unlock (&urb->lock); |
| 893 | } |
| 894 | |
| 895 | /* transfer up to a frame's worth; caller must own lock */ |
| 896 | static int |
| 897 | transfer (struct dummy *dum, struct urb *urb, struct dummy_ep *ep, int limit) |
| 898 | { |
| 899 | struct dummy_request *req; |
| 900 | |
| 901 | top: |
| 902 | /* if there's no request queued, the device is NAKing; return */ |
| 903 | list_for_each_entry (req, &ep->queue, queue) { |
| 904 | unsigned host_len, dev_len, len; |
| 905 | int is_short, to_host; |
| 906 | int rescan = 0; |
| 907 | |
| 908 | /* 1..N packets of ep->ep.maxpacket each ... the last one |
| 909 | * may be short (including zero length). |
| 910 | * |
| 911 | * writer can send a zlp explicitly (length 0) or implicitly |
| 912 | * (length mod maxpacket zero, and 'zero' flag); they always |
| 913 | * terminate reads. |
| 914 | */ |
| 915 | host_len = urb->transfer_buffer_length - urb->actual_length; |
| 916 | dev_len = req->req.length - req->req.actual; |
| 917 | len = min (host_len, dev_len); |
| 918 | |
| 919 | /* FIXME update emulated data toggle too */ |
| 920 | |
| 921 | to_host = usb_pipein (urb->pipe); |
| 922 | if (unlikely (len == 0)) |
| 923 | is_short = 1; |
| 924 | else { |
| 925 | char *ubuf, *rbuf; |
| 926 | |
| 927 | /* not enough bandwidth left? */ |
| 928 | if (limit < ep->ep.maxpacket && limit < len) |
| 929 | break; |
| 930 | len = min (len, (unsigned) limit); |
| 931 | if (len == 0) |
| 932 | break; |
| 933 | |
| 934 | /* use an extra pass for the final short packet */ |
| 935 | if (len > ep->ep.maxpacket) { |
| 936 | rescan = 1; |
| 937 | len -= (len % ep->ep.maxpacket); |
| 938 | } |
| 939 | is_short = (len % ep->ep.maxpacket) != 0; |
| 940 | |
| 941 | /* else transfer packet(s) */ |
| 942 | ubuf = urb->transfer_buffer + urb->actual_length; |
| 943 | rbuf = req->req.buf + req->req.actual; |
| 944 | if (to_host) |
| 945 | memcpy (ubuf, rbuf, len); |
| 946 | else |
| 947 | memcpy (rbuf, ubuf, len); |
| 948 | ep->last_io = jiffies; |
| 949 | |
| 950 | limit -= len; |
| 951 | urb->actual_length += len; |
| 952 | req->req.actual += len; |
| 953 | } |
| 954 | |
| 955 | /* short packets terminate, maybe with overflow/underflow. |
| 956 | * it's only really an error to write too much. |
| 957 | * |
| 958 | * partially filling a buffer optionally blocks queue advances |
| 959 | * (so completion handlers can clean up the queue) but we don't |
| 960 | * need to emulate such data-in-flight. so we only show part |
| 961 | * of the URB_SHORT_NOT_OK effect: completion status. |
| 962 | */ |
| 963 | if (is_short) { |
| 964 | if (host_len == dev_len) { |
| 965 | req->req.status = 0; |
| 966 | maybe_set_status (urb, 0); |
| 967 | } else if (to_host) { |
| 968 | req->req.status = 0; |
| 969 | if (dev_len > host_len) |
| 970 | maybe_set_status (urb, -EOVERFLOW); |
| 971 | else |
| 972 | maybe_set_status (urb, |
| 973 | (urb->transfer_flags |
| 974 | & URB_SHORT_NOT_OK) |
| 975 | ? -EREMOTEIO : 0); |
| 976 | } else if (!to_host) { |
| 977 | maybe_set_status (urb, 0); |
| 978 | if (host_len > dev_len) |
| 979 | req->req.status = -EOVERFLOW; |
| 980 | else |
| 981 | req->req.status = 0; |
| 982 | } |
| 983 | |
| 984 | /* many requests terminate without a short packet */ |
| 985 | } else { |
| 986 | if (req->req.length == req->req.actual |
| 987 | && !req->req.zero) |
| 988 | req->req.status = 0; |
| 989 | if (urb->transfer_buffer_length == urb->actual_length |
| 990 | && !(urb->transfer_flags |
| 991 | & URB_ZERO_PACKET)) { |
| 992 | maybe_set_status (urb, 0); |
| 993 | } |
| 994 | } |
| 995 | |
| 996 | /* device side completion --> continuable */ |
| 997 | if (req->req.status != -EINPROGRESS) { |
| 998 | list_del_init (&req->queue); |
| 999 | |
| 1000 | spin_unlock (&dum->lock); |
| 1001 | req->req.complete (&ep->ep, &req->req); |
| 1002 | spin_lock (&dum->lock); |
| 1003 | |
| 1004 | /* requests might have been unlinked... */ |
| 1005 | rescan = 1; |
| 1006 | } |
| 1007 | |
| 1008 | /* host side completion --> terminate */ |
| 1009 | if (urb->status != -EINPROGRESS) |
| 1010 | break; |
| 1011 | |
| 1012 | /* rescan to continue with any other queued i/o */ |
| 1013 | if (rescan) |
| 1014 | goto top; |
| 1015 | } |
| 1016 | return limit; |
| 1017 | } |
| 1018 | |
| 1019 | static int periodic_bytes (struct dummy *dum, struct dummy_ep *ep) |
| 1020 | { |
| 1021 | int limit = ep->ep.maxpacket; |
| 1022 | |
| 1023 | if (dum->gadget.speed == USB_SPEED_HIGH) { |
| 1024 | int tmp; |
| 1025 | |
| 1026 | /* high bandwidth mode */ |
| 1027 | tmp = le16_to_cpu(ep->desc->wMaxPacketSize); |
| 1028 | tmp = le16_to_cpu (tmp); |
| 1029 | tmp = (tmp >> 11) & 0x03; |
| 1030 | tmp *= 8 /* applies to entire frame */; |
| 1031 | limit += limit * tmp; |
| 1032 | } |
| 1033 | return limit; |
| 1034 | } |
| 1035 | |
| 1036 | #define is_active(dum) ((dum->port_status & \ |
| 1037 | (USB_PORT_STAT_CONNECTION | USB_PORT_STAT_ENABLE | \ |
| 1038 | USB_PORT_STAT_SUSPEND)) \ |
| 1039 | == (USB_PORT_STAT_CONNECTION | USB_PORT_STAT_ENABLE)) |
| 1040 | |
| 1041 | static struct dummy_ep *find_endpoint (struct dummy *dum, u8 address) |
| 1042 | { |
| 1043 | int i; |
| 1044 | |
| 1045 | if (!is_active (dum)) |
| 1046 | return NULL; |
| 1047 | if ((address & ~USB_DIR_IN) == 0) |
| 1048 | return &dum->ep [0]; |
| 1049 | for (i = 1; i < DUMMY_ENDPOINTS; i++) { |
| 1050 | struct dummy_ep *ep = &dum->ep [i]; |
| 1051 | |
| 1052 | if (!ep->desc) |
| 1053 | continue; |
| 1054 | if (ep->desc->bEndpointAddress == address) |
| 1055 | return ep; |
| 1056 | } |
| 1057 | return NULL; |
| 1058 | } |
| 1059 | |
| 1060 | #undef is_active |
| 1061 | |
| 1062 | #define Dev_Request (USB_TYPE_STANDARD | USB_RECIP_DEVICE) |
| 1063 | #define Dev_InRequest (Dev_Request | USB_DIR_IN) |
| 1064 | #define Intf_Request (USB_TYPE_STANDARD | USB_RECIP_INTERFACE) |
| 1065 | #define Intf_InRequest (Intf_Request | USB_DIR_IN) |
| 1066 | #define Ep_Request (USB_TYPE_STANDARD | USB_RECIP_ENDPOINT) |
| 1067 | #define Ep_InRequest (Ep_Request | USB_DIR_IN) |
| 1068 | |
| 1069 | /* drive both sides of the transfers; looks like irq handlers to |
| 1070 | * both drivers except the callbacks aren't in_irq(). |
| 1071 | */ |
| 1072 | static void dummy_timer (unsigned long _dum) |
| 1073 | { |
| 1074 | struct dummy *dum = (struct dummy *) _dum; |
| 1075 | struct urbp *urbp, *tmp; |
| 1076 | unsigned long flags; |
| 1077 | int limit, total; |
| 1078 | int i; |
| 1079 | |
| 1080 | /* simplistic model for one frame's bandwidth */ |
| 1081 | switch (dum->gadget.speed) { |
| 1082 | case USB_SPEED_LOW: |
| 1083 | total = 8/*bytes*/ * 12/*packets*/; |
| 1084 | break; |
| 1085 | case USB_SPEED_FULL: |
| 1086 | total = 64/*bytes*/ * 19/*packets*/; |
| 1087 | break; |
| 1088 | case USB_SPEED_HIGH: |
| 1089 | total = 512/*bytes*/ * 13/*packets*/ * 8/*uframes*/; |
| 1090 | break; |
| 1091 | default: |
| 1092 | dev_err (dummy_dev(dum), "bogus device speed\n"); |
| 1093 | return; |
| 1094 | } |
| 1095 | |
| 1096 | /* FIXME if HZ != 1000 this will probably misbehave ... */ |
| 1097 | |
| 1098 | /* look at each urb queued by the host side driver */ |
| 1099 | spin_lock_irqsave (&dum->lock, flags); |
| 1100 | |
| 1101 | if (!dum->udev) { |
| 1102 | dev_err (dummy_dev(dum), |
| 1103 | "timer fired with no URBs pending?\n"); |
| 1104 | spin_unlock_irqrestore (&dum->lock, flags); |
| 1105 | return; |
| 1106 | } |
| 1107 | |
| 1108 | for (i = 0; i < DUMMY_ENDPOINTS; i++) { |
| 1109 | if (!ep_name [i]) |
| 1110 | break; |
| 1111 | dum->ep [i].already_seen = 0; |
| 1112 | } |
| 1113 | |
| 1114 | restart: |
| 1115 | list_for_each_entry_safe (urbp, tmp, &dum->urbp_list, urbp_list) { |
| 1116 | struct urb *urb; |
| 1117 | struct dummy_request *req; |
| 1118 | u8 address; |
| 1119 | struct dummy_ep *ep = NULL; |
| 1120 | int type; |
| 1121 | |
| 1122 | urb = urbp->urb; |
| 1123 | if (urb->status != -EINPROGRESS) { |
| 1124 | /* likely it was just unlinked */ |
| 1125 | goto return_urb; |
| 1126 | } |
| 1127 | type = usb_pipetype (urb->pipe); |
| 1128 | |
| 1129 | /* used up this frame's non-periodic bandwidth? |
| 1130 | * FIXME there's infinite bandwidth for control and |
| 1131 | * periodic transfers ... unrealistic. |
| 1132 | */ |
| 1133 | if (total <= 0 && type == PIPE_BULK) |
| 1134 | continue; |
| 1135 | |
| 1136 | /* find the gadget's ep for this request (if configured) */ |
| 1137 | address = usb_pipeendpoint (urb->pipe); |
| 1138 | if (usb_pipein (urb->pipe)) |
| 1139 | address |= USB_DIR_IN; |
| 1140 | ep = find_endpoint(dum, address); |
| 1141 | if (!ep) { |
| 1142 | /* set_configuration() disagreement */ |
| 1143 | dev_dbg (dummy_dev(dum), |
| 1144 | "no ep configured for urb %p\n", |
| 1145 | urb); |
| 1146 | maybe_set_status (urb, -EPROTO); |
| 1147 | goto return_urb; |
| 1148 | } |
| 1149 | |
| 1150 | if (ep->already_seen) |
| 1151 | continue; |
| 1152 | ep->already_seen = 1; |
| 1153 | if (ep == &dum->ep [0] && urb->error_count) { |
| 1154 | ep->setup_stage = 1; /* a new urb */ |
| 1155 | urb->error_count = 0; |
| 1156 | } |
| 1157 | if (ep->halted && !ep->setup_stage) { |
| 1158 | /* NOTE: must not be iso! */ |
| 1159 | dev_dbg (dummy_dev(dum), "ep %s halted, urb %p\n", |
| 1160 | ep->ep.name, urb); |
| 1161 | maybe_set_status (urb, -EPIPE); |
| 1162 | goto return_urb; |
| 1163 | } |
| 1164 | /* FIXME make sure both ends agree on maxpacket */ |
| 1165 | |
| 1166 | /* handle control requests */ |
| 1167 | if (ep == &dum->ep [0] && ep->setup_stage) { |
| 1168 | struct usb_ctrlrequest setup; |
| 1169 | int value = 1; |
| 1170 | struct dummy_ep *ep2; |
| 1171 | |
| 1172 | setup = *(struct usb_ctrlrequest*) urb->setup_packet; |
| 1173 | le16_to_cpus (&setup.wIndex); |
| 1174 | le16_to_cpus (&setup.wValue); |
| 1175 | le16_to_cpus (&setup.wLength); |
| 1176 | if (setup.wLength != urb->transfer_buffer_length) { |
| 1177 | maybe_set_status (urb, -EOVERFLOW); |
| 1178 | goto return_urb; |
| 1179 | } |
| 1180 | |
| 1181 | /* paranoia, in case of stale queued data */ |
| 1182 | list_for_each_entry (req, &ep->queue, queue) { |
| 1183 | list_del_init (&req->queue); |
| 1184 | req->req.status = -EOVERFLOW; |
| 1185 | dev_dbg (dummy_dev(dum), "stale req = %p\n", |
| 1186 | req); |
| 1187 | |
| 1188 | spin_unlock (&dum->lock); |
| 1189 | req->req.complete (&ep->ep, &req->req); |
| 1190 | spin_lock (&dum->lock); |
| 1191 | ep->already_seen = 0; |
| 1192 | goto restart; |
| 1193 | } |
| 1194 | |
| 1195 | /* gadget driver never sees set_address or operations |
| 1196 | * on standard feature flags. some hardware doesn't |
| 1197 | * even expose them. |
| 1198 | */ |
| 1199 | ep->last_io = jiffies; |
| 1200 | ep->setup_stage = 0; |
| 1201 | ep->halted = 0; |
| 1202 | switch (setup.bRequest) { |
| 1203 | case USB_REQ_SET_ADDRESS: |
| 1204 | if (setup.bRequestType != Dev_Request) |
| 1205 | break; |
| 1206 | dum->address = setup.wValue; |
| 1207 | maybe_set_status (urb, 0); |
| 1208 | dev_dbg (dummy_dev(dum), "set_address = %d\n", |
| 1209 | setup.wValue); |
| 1210 | value = 0; |
| 1211 | break; |
| 1212 | case USB_REQ_SET_FEATURE: |
| 1213 | if (setup.bRequestType == Dev_Request) { |
| 1214 | value = 0; |
| 1215 | switch (setup.wValue) { |
| 1216 | case USB_DEVICE_REMOTE_WAKEUP: |
| 1217 | break; |
| 1218 | default: |
| 1219 | value = -EOPNOTSUPP; |
| 1220 | } |
| 1221 | if (value == 0) { |
| 1222 | dum->devstatus |= |
| 1223 | (1 << setup.wValue); |
| 1224 | maybe_set_status (urb, 0); |
| 1225 | } |
| 1226 | |
| 1227 | } else if (setup.bRequestType == Ep_Request) { |
| 1228 | // endpoint halt |
| 1229 | ep2 = find_endpoint (dum, |
| 1230 | setup.wIndex); |
| 1231 | if (!ep2) { |
| 1232 | value = -EOPNOTSUPP; |
| 1233 | break; |
| 1234 | } |
| 1235 | ep2->halted = 1; |
| 1236 | value = 0; |
| 1237 | maybe_set_status (urb, 0); |
| 1238 | } |
| 1239 | break; |
| 1240 | case USB_REQ_CLEAR_FEATURE: |
| 1241 | if (setup.bRequestType == Dev_Request) { |
| 1242 | switch (setup.wValue) { |
| 1243 | case USB_DEVICE_REMOTE_WAKEUP: |
| 1244 | dum->devstatus &= ~(1 << |
| 1245 | USB_DEVICE_REMOTE_WAKEUP); |
| 1246 | value = 0; |
| 1247 | maybe_set_status (urb, 0); |
| 1248 | break; |
| 1249 | default: |
| 1250 | value = -EOPNOTSUPP; |
| 1251 | break; |
| 1252 | } |
| 1253 | } else if (setup.bRequestType == Ep_Request) { |
| 1254 | // endpoint halt |
| 1255 | ep2 = find_endpoint (dum, |
| 1256 | setup.wIndex); |
| 1257 | if (!ep2) { |
| 1258 | value = -EOPNOTSUPP; |
| 1259 | break; |
| 1260 | } |
| 1261 | ep2->halted = 0; |
| 1262 | value = 0; |
| 1263 | maybe_set_status (urb, 0); |
| 1264 | } |
| 1265 | break; |
| 1266 | case USB_REQ_GET_STATUS: |
| 1267 | if (setup.bRequestType == Dev_InRequest |
| 1268 | || setup.bRequestType |
| 1269 | == Intf_InRequest |
| 1270 | || setup.bRequestType |
| 1271 | == Ep_InRequest |
| 1272 | ) { |
| 1273 | char *buf; |
| 1274 | |
| 1275 | // device: remote wakeup, selfpowered |
| 1276 | // interface: nothing |
| 1277 | // endpoint: halt |
| 1278 | buf = (char *)urb->transfer_buffer; |
| 1279 | if (urb->transfer_buffer_length > 0) { |
| 1280 | if (setup.bRequestType == |
| 1281 | Ep_InRequest) { |
| 1282 | ep2 = find_endpoint (dum, setup.wIndex); |
| 1283 | if (!ep2) { |
| 1284 | value = -EOPNOTSUPP; |
| 1285 | break; |
| 1286 | } |
| 1287 | buf [0] = ep2->halted; |
| 1288 | } else if (setup.bRequestType == |
| 1289 | Dev_InRequest) { |
| 1290 | buf [0] = (u8) |
| 1291 | dum->devstatus; |
| 1292 | } else |
| 1293 | buf [0] = 0; |
| 1294 | } |
| 1295 | if (urb->transfer_buffer_length > 1) |
| 1296 | buf [1] = 0; |
| 1297 | urb->actual_length = min (2, |
| 1298 | urb->transfer_buffer_length); |
| 1299 | value = 0; |
| 1300 | maybe_set_status (urb, 0); |
| 1301 | } |
| 1302 | break; |
| 1303 | } |
| 1304 | |
| 1305 | /* gadget driver handles all other requests. block |
| 1306 | * until setup() returns; no reentrancy issues etc. |
| 1307 | */ |
| 1308 | if (value > 0) { |
| 1309 | spin_unlock (&dum->lock); |
| 1310 | value = dum->driver->setup (&dum->gadget, |
| 1311 | &setup); |
| 1312 | spin_lock (&dum->lock); |
| 1313 | |
| 1314 | if (value >= 0) { |
| 1315 | /* no delays (max 64KB data stage) */ |
| 1316 | limit = 64*1024; |
| 1317 | goto treat_control_like_bulk; |
| 1318 | } |
| 1319 | /* error, see below */ |
| 1320 | } |
| 1321 | |
| 1322 | if (value < 0) { |
| 1323 | if (value != -EOPNOTSUPP) |
| 1324 | dev_dbg (dummy_dev(dum), |
| 1325 | "setup --> %d\n", |
| 1326 | value); |
| 1327 | maybe_set_status (urb, -EPIPE); |
| 1328 | urb->actual_length = 0; |
| 1329 | } |
| 1330 | |
| 1331 | goto return_urb; |
| 1332 | } |
| 1333 | |
| 1334 | /* non-control requests */ |
| 1335 | limit = total; |
| 1336 | switch (usb_pipetype (urb->pipe)) { |
| 1337 | case PIPE_ISOCHRONOUS: |
| 1338 | /* FIXME is it urb->interval since the last xfer? |
| 1339 | * use urb->iso_frame_desc[i]. |
| 1340 | * complete whether or not ep has requests queued. |
| 1341 | * report random errors, to debug drivers. |
| 1342 | */ |
| 1343 | limit = max (limit, periodic_bytes (dum, ep)); |
| 1344 | maybe_set_status (urb, -ENOSYS); |
| 1345 | break; |
| 1346 | |
| 1347 | case PIPE_INTERRUPT: |
| 1348 | /* FIXME is it urb->interval since the last xfer? |
| 1349 | * this almost certainly polls too fast. |
| 1350 | */ |
| 1351 | limit = max (limit, periodic_bytes (dum, ep)); |
| 1352 | /* FALLTHROUGH */ |
| 1353 | |
| 1354 | // case PIPE_BULK: case PIPE_CONTROL: |
| 1355 | default: |
| 1356 | treat_control_like_bulk: |
| 1357 | ep->last_io = jiffies; |
| 1358 | total = transfer (dum, urb, ep, limit); |
| 1359 | break; |
| 1360 | } |
| 1361 | |
| 1362 | /* incomplete transfer? */ |
| 1363 | if (urb->status == -EINPROGRESS) |
| 1364 | continue; |
| 1365 | |
| 1366 | return_urb: |
| 1367 | urb->hcpriv = NULL; |
| 1368 | list_del (&urbp->urbp_list); |
| 1369 | kfree (urbp); |
| 1370 | if (ep) |
| 1371 | ep->already_seen = ep->setup_stage = 0; |
| 1372 | |
| 1373 | spin_unlock (&dum->lock); |
| 1374 | usb_hcd_giveback_urb (dummy_to_hcd(dum), urb, NULL); |
| 1375 | spin_lock (&dum->lock); |
| 1376 | |
| 1377 | goto restart; |
| 1378 | } |
| 1379 | |
| 1380 | /* want a 1 msec delay here */ |
| 1381 | if (!list_empty (&dum->urbp_list)) |
| 1382 | mod_timer (&dum->timer, jiffies + msecs_to_jiffies(1)); |
| 1383 | else { |
| 1384 | usb_put_dev (dum->udev); |
| 1385 | dum->udev = NULL; |
| 1386 | } |
| 1387 | |
| 1388 | spin_unlock_irqrestore (&dum->lock, flags); |
| 1389 | } |
| 1390 | |
| 1391 | /*-------------------------------------------------------------------------*/ |
| 1392 | |
| 1393 | #define PORT_C_MASK \ |
| 1394 | ((1 << USB_PORT_FEAT_C_CONNECTION) \ |
| 1395 | | (1 << USB_PORT_FEAT_C_ENABLE) \ |
| 1396 | | (1 << USB_PORT_FEAT_C_SUSPEND) \ |
| 1397 | | (1 << USB_PORT_FEAT_C_OVER_CURRENT) \ |
| 1398 | | (1 << USB_PORT_FEAT_C_RESET)) |
| 1399 | |
| 1400 | static int dummy_hub_status (struct usb_hcd *hcd, char *buf) |
| 1401 | { |
| 1402 | struct dummy *dum; |
| 1403 | unsigned long flags; |
| 1404 | int retval; |
| 1405 | |
| 1406 | dum = hcd_to_dummy (hcd); |
| 1407 | |
| 1408 | spin_lock_irqsave (&dum->lock, flags); |
| 1409 | if (!(dum->port_status & PORT_C_MASK)) |
| 1410 | retval = 0; |
| 1411 | else { |
| 1412 | *buf = (1 << 1); |
| 1413 | dev_dbg (dummy_dev(dum), "port status 0x%08x has changes\n", |
| 1414 | dum->port_status); |
| 1415 | retval = 1; |
| 1416 | } |
| 1417 | spin_unlock_irqrestore (&dum->lock, flags); |
| 1418 | return retval; |
| 1419 | } |
| 1420 | |
| 1421 | static inline void |
| 1422 | hub_descriptor (struct usb_hub_descriptor *desc) |
| 1423 | { |
| 1424 | memset (desc, 0, sizeof *desc); |
| 1425 | desc->bDescriptorType = 0x29; |
| 1426 | desc->bDescLength = 9; |
| 1427 | desc->wHubCharacteristics = __constant_cpu_to_le16 (0x0001); |
| 1428 | desc->bNbrPorts = 1; |
| 1429 | desc->bitmap [0] = 0xff; |
| 1430 | desc->bitmap [1] = 0xff; |
| 1431 | } |
| 1432 | |
| 1433 | static int dummy_hub_control ( |
| 1434 | struct usb_hcd *hcd, |
| 1435 | u16 typeReq, |
| 1436 | u16 wValue, |
| 1437 | u16 wIndex, |
| 1438 | char *buf, |
| 1439 | u16 wLength |
| 1440 | ) { |
| 1441 | struct dummy *dum; |
| 1442 | int retval = 0; |
| 1443 | unsigned long flags; |
| 1444 | |
| 1445 | dum = hcd_to_dummy (hcd); |
| 1446 | spin_lock_irqsave (&dum->lock, flags); |
| 1447 | switch (typeReq) { |
| 1448 | case ClearHubFeature: |
| 1449 | break; |
| 1450 | case ClearPortFeature: |
| 1451 | switch (wValue) { |
| 1452 | case USB_PORT_FEAT_SUSPEND: |
| 1453 | if (dum->port_status & (1 << USB_PORT_FEAT_SUSPEND)) { |
| 1454 | /* 20msec resume signaling */ |
| 1455 | dum->resuming = 1; |
| 1456 | dum->re_timeout = jiffies + |
| 1457 | msecs_to_jiffies(20); |
| 1458 | } |
| 1459 | break; |
| 1460 | case USB_PORT_FEAT_POWER: |
| 1461 | dum->port_status = 0; |
| 1462 | dum->resuming = 0; |
| 1463 | stop_activity(dum, dum->driver); |
| 1464 | break; |
| 1465 | default: |
| 1466 | dum->port_status &= ~(1 << wValue); |
| 1467 | } |
| 1468 | break; |
| 1469 | case GetHubDescriptor: |
| 1470 | hub_descriptor ((struct usb_hub_descriptor *) buf); |
| 1471 | break; |
| 1472 | case GetHubStatus: |
| 1473 | *(u32 *) buf = __constant_cpu_to_le32 (0); |
| 1474 | break; |
| 1475 | case GetPortStatus: |
| 1476 | if (wIndex != 1) |
| 1477 | retval = -EPIPE; |
| 1478 | |
| 1479 | /* whoever resets or resumes must GetPortStatus to |
| 1480 | * complete it!! |
| 1481 | */ |
| 1482 | if (dum->resuming && time_after (jiffies, dum->re_timeout)) { |
| 1483 | dum->port_status |= (1 << USB_PORT_FEAT_C_SUSPEND); |
| 1484 | dum->port_status &= ~(1 << USB_PORT_FEAT_SUSPEND); |
| 1485 | dum->resuming = 0; |
| 1486 | dum->re_timeout = 0; |
| 1487 | if (dum->driver && dum->driver->resume) { |
| 1488 | spin_unlock (&dum->lock); |
| 1489 | dum->driver->resume (&dum->gadget); |
| 1490 | spin_lock (&dum->lock); |
| 1491 | } |
| 1492 | } |
| 1493 | if ((dum->port_status & (1 << USB_PORT_FEAT_RESET)) != 0 |
| 1494 | && time_after (jiffies, dum->re_timeout)) { |
| 1495 | dum->port_status |= (1 << USB_PORT_FEAT_C_RESET); |
| 1496 | dum->port_status &= ~(1 << USB_PORT_FEAT_RESET); |
| 1497 | dum->re_timeout = 0; |
| 1498 | if (dum->driver) { |
| 1499 | dum->port_status |= USB_PORT_STAT_ENABLE; |
| 1500 | /* give it the best speed we agree on */ |
| 1501 | dum->gadget.speed = dum->driver->speed; |
| 1502 | dum->gadget.ep0->maxpacket = 64; |
| 1503 | switch (dum->gadget.speed) { |
| 1504 | case USB_SPEED_HIGH: |
| 1505 | dum->port_status |= |
| 1506 | USB_PORT_STAT_HIGH_SPEED; |
| 1507 | break; |
| 1508 | case USB_SPEED_LOW: |
| 1509 | dum->gadget.ep0->maxpacket = 8; |
| 1510 | dum->port_status |= |
| 1511 | USB_PORT_STAT_LOW_SPEED; |
| 1512 | break; |
| 1513 | default: |
| 1514 | dum->gadget.speed = USB_SPEED_FULL; |
| 1515 | break; |
| 1516 | } |
| 1517 | } |
| 1518 | } |
| 1519 | ((u16 *) buf)[0] = cpu_to_le16 (dum->port_status); |
| 1520 | ((u16 *) buf)[1] = cpu_to_le16 (dum->port_status >> 16); |
| 1521 | break; |
| 1522 | case SetHubFeature: |
| 1523 | retval = -EPIPE; |
| 1524 | break; |
| 1525 | case SetPortFeature: |
| 1526 | switch (wValue) { |
| 1527 | case USB_PORT_FEAT_SUSPEND: |
| 1528 | if ((dum->port_status & (1 << USB_PORT_FEAT_SUSPEND)) |
| 1529 | == 0) { |
| 1530 | dum->port_status |= |
| 1531 | (1 << USB_PORT_FEAT_SUSPEND); |
| 1532 | if (dum->driver && dum->driver->suspend) { |
| 1533 | spin_unlock (&dum->lock); |
| 1534 | dum->driver->suspend (&dum->gadget); |
| 1535 | spin_lock (&dum->lock); |
| 1536 | } |
| 1537 | } |
| 1538 | break; |
| 1539 | case USB_PORT_FEAT_RESET: |
| 1540 | /* if it's already running, disconnect first */ |
| 1541 | if (dum->port_status & USB_PORT_STAT_ENABLE) { |
| 1542 | dum->port_status &= ~(USB_PORT_STAT_ENABLE |
| 1543 | | USB_PORT_STAT_LOW_SPEED |
| 1544 | | USB_PORT_STAT_HIGH_SPEED); |
| 1545 | if (dum->driver) { |
| 1546 | dev_dbg (dummy_dev(dum), |
| 1547 | "disconnect\n"); |
| 1548 | stop_activity (dum, dum->driver); |
| 1549 | } |
| 1550 | |
| 1551 | /* FIXME test that code path! */ |
| 1552 | } |
| 1553 | /* 50msec reset signaling */ |
| 1554 | dum->re_timeout = jiffies + msecs_to_jiffies(50); |
| 1555 | /* FALLTHROUGH */ |
| 1556 | default: |
| 1557 | dum->port_status |= (1 << wValue); |
| 1558 | } |
| 1559 | break; |
| 1560 | |
| 1561 | default: |
| 1562 | dev_dbg (dummy_dev(dum), |
| 1563 | "hub control req%04x v%04x i%04x l%d\n", |
| 1564 | typeReq, wValue, wIndex, wLength); |
| 1565 | |
| 1566 | /* "protocol stall" on error */ |
| 1567 | retval = -EPIPE; |
| 1568 | } |
| 1569 | spin_unlock_irqrestore (&dum->lock, flags); |
| 1570 | return retval; |
| 1571 | } |
| 1572 | |
| 1573 | |
| 1574 | /*-------------------------------------------------------------------------*/ |
| 1575 | |
| 1576 | static inline ssize_t |
| 1577 | show_urb (char *buf, size_t size, struct urb *urb) |
| 1578 | { |
| 1579 | int ep = usb_pipeendpoint (urb->pipe); |
| 1580 | |
| 1581 | return snprintf (buf, size, |
| 1582 | "urb/%p %s ep%d%s%s len %d/%d\n", |
| 1583 | urb, |
| 1584 | ({ char *s; |
| 1585 | switch (urb->dev->speed) { |
| 1586 | case USB_SPEED_LOW: s = "ls"; break; |
| 1587 | case USB_SPEED_FULL: s = "fs"; break; |
| 1588 | case USB_SPEED_HIGH: s = "hs"; break; |
| 1589 | default: s = "?"; break; |
| 1590 | }; s; }), |
| 1591 | ep, ep ? (usb_pipein (urb->pipe) ? "in" : "out") : "", |
| 1592 | ({ char *s; \ |
| 1593 | switch (usb_pipetype (urb->pipe)) { \ |
| 1594 | case PIPE_CONTROL: s = ""; break; \ |
| 1595 | case PIPE_BULK: s = "-bulk"; break; \ |
| 1596 | case PIPE_INTERRUPT: s = "-int"; break; \ |
| 1597 | default: s = "-iso"; break; \ |
| 1598 | }; s;}), |
| 1599 | urb->actual_length, urb->transfer_buffer_length); |
| 1600 | } |
| 1601 | |
| 1602 | static ssize_t |
| 1603 | show_urbs (struct device *dev, char *buf) |
| 1604 | { |
| 1605 | struct usb_hcd *hcd = dev_get_drvdata (dev); |
| 1606 | struct dummy *dum = hcd_to_dummy (hcd); |
| 1607 | struct urbp *urbp; |
| 1608 | size_t size = 0; |
| 1609 | unsigned long flags; |
| 1610 | |
| 1611 | spin_lock_irqsave (&dum->lock, flags); |
| 1612 | list_for_each_entry (urbp, &dum->urbp_list, urbp_list) { |
| 1613 | size_t temp; |
| 1614 | |
| 1615 | temp = show_urb (buf, PAGE_SIZE - size, urbp->urb); |
| 1616 | buf += temp; |
| 1617 | size += temp; |
| 1618 | } |
| 1619 | spin_unlock_irqrestore (&dum->lock, flags); |
| 1620 | |
| 1621 | return size; |
| 1622 | } |
| 1623 | static DEVICE_ATTR (urbs, S_IRUGO, show_urbs, NULL); |
| 1624 | |
| 1625 | static int dummy_start (struct usb_hcd *hcd) |
| 1626 | { |
| 1627 | struct dummy *dum; |
| 1628 | struct usb_device *root; |
| 1629 | int retval; |
| 1630 | |
| 1631 | dum = hcd_to_dummy (hcd); |
| 1632 | |
| 1633 | /* |
| 1634 | * MASTER side init ... we emulate a root hub that'll only ever |
| 1635 | * talk to one device (the slave side). Also appears in sysfs, |
| 1636 | * just like more familiar pci-based HCDs. |
| 1637 | */ |
| 1638 | spin_lock_init (&dum->lock); |
| 1639 | init_timer (&dum->timer); |
| 1640 | dum->timer.function = dummy_timer; |
| 1641 | dum->timer.data = (unsigned long) dum; |
| 1642 | |
| 1643 | INIT_LIST_HEAD (&dum->urbp_list); |
| 1644 | |
| 1645 | root = usb_alloc_dev (NULL, &hcd->self, 0); |
| 1646 | if (!root) |
| 1647 | return -ENOMEM; |
| 1648 | |
| 1649 | /* root hub enters addressed state... */ |
| 1650 | hcd->state = HC_STATE_RUNNING; |
| 1651 | root->speed = USB_SPEED_HIGH; |
| 1652 | |
| 1653 | /* ...then configured, so khubd sees us. */ |
| 1654 | if ((retval = usb_hcd_register_root_hub (root, hcd)) != 0) { |
| 1655 | goto err1; |
| 1656 | } |
| 1657 | |
| 1658 | /* only show a low-power port: just 8mA */ |
| 1659 | hub_set_power_budget (root, 8); |
| 1660 | |
| 1661 | if ((retval = dummy_register_udc (dum)) != 0) |
| 1662 | goto err2; |
| 1663 | |
| 1664 | /* FIXME 'urbs' should be a per-device thing, maybe in usbcore */ |
| 1665 | device_create_file (dummy_dev(dum), &dev_attr_urbs); |
| 1666 | return 0; |
| 1667 | |
| 1668 | err2: |
| 1669 | usb_disconnect (&hcd->self.root_hub); |
| 1670 | err1: |
| 1671 | usb_put_dev (root); |
| 1672 | hcd->state = HC_STATE_QUIESCING; |
| 1673 | return retval; |
| 1674 | } |
| 1675 | |
| 1676 | static void dummy_stop (struct usb_hcd *hcd) |
| 1677 | { |
| 1678 | struct dummy *dum; |
| 1679 | |
| 1680 | dum = hcd_to_dummy (hcd); |
| 1681 | |
| 1682 | device_remove_file (dummy_dev(dum), &dev_attr_urbs); |
| 1683 | |
| 1684 | usb_gadget_unregister_driver (dum->driver); |
| 1685 | dummy_unregister_udc (dum); |
| 1686 | |
| 1687 | dev_info (dummy_dev(dum), "stopped\n"); |
| 1688 | } |
| 1689 | |
| 1690 | /*-------------------------------------------------------------------------*/ |
| 1691 | |
| 1692 | static int dummy_h_get_frame (struct usb_hcd *hcd) |
| 1693 | { |
| 1694 | return dummy_g_get_frame (NULL); |
| 1695 | } |
| 1696 | |
| 1697 | static const struct hc_driver dummy_hcd = { |
| 1698 | .description = (char *) driver_name, |
| 1699 | .product_desc = "Dummy host controller", |
| 1700 | .hcd_priv_size = sizeof(struct dummy), |
| 1701 | |
| 1702 | .flags = HCD_USB2, |
| 1703 | |
| 1704 | .start = dummy_start, |
| 1705 | .stop = dummy_stop, |
| 1706 | |
| 1707 | .urb_enqueue = dummy_urb_enqueue, |
| 1708 | .urb_dequeue = dummy_urb_dequeue, |
| 1709 | |
| 1710 | .get_frame_number = dummy_h_get_frame, |
| 1711 | |
| 1712 | .hub_status_data = dummy_hub_status, |
| 1713 | .hub_control = dummy_hub_control, |
| 1714 | }; |
| 1715 | |
| 1716 | static int dummy_probe (struct device *dev) |
| 1717 | { |
| 1718 | struct usb_hcd *hcd; |
| 1719 | int retval; |
| 1720 | |
| 1721 | dev_info (dev, "%s, driver " DRIVER_VERSION "\n", driver_desc); |
| 1722 | |
| 1723 | hcd = usb_create_hcd (&dummy_hcd, dev, dev->bus_id); |
| 1724 | if (!hcd) |
| 1725 | return -ENOMEM; |
| 1726 | the_controller = hcd_to_dummy (hcd); |
| 1727 | |
| 1728 | retval = usb_add_hcd(hcd, 0, 0); |
| 1729 | if (retval != 0) { |
| 1730 | usb_put_hcd (hcd); |
| 1731 | the_controller = NULL; |
| 1732 | } |
| 1733 | return retval; |
| 1734 | } |
| 1735 | |
| 1736 | static void dummy_remove (struct device *dev) |
| 1737 | { |
| 1738 | struct usb_hcd *hcd; |
| 1739 | |
| 1740 | hcd = dev_get_drvdata (dev); |
| 1741 | usb_remove_hcd (hcd); |
| 1742 | usb_put_hcd (hcd); |
| 1743 | the_controller = NULL; |
| 1744 | } |
| 1745 | |
| 1746 | /*-------------------------------------------------------------------------*/ |
| 1747 | |
| 1748 | static int dummy_pdev_detect (void) |
| 1749 | { |
| 1750 | int retval; |
| 1751 | |
| 1752 | retval = driver_register (&dummy_driver); |
| 1753 | if (retval < 0) |
| 1754 | return retval; |
| 1755 | |
| 1756 | the_pdev.name = "hc"; |
| 1757 | the_pdev.dev.driver = &dummy_driver; |
| 1758 | the_pdev.dev.release = dummy_pdev_release; |
| 1759 | |
| 1760 | retval = platform_device_register (&the_pdev); |
| 1761 | if (retval < 0) |
| 1762 | driver_unregister (&dummy_driver); |
| 1763 | return retval; |
| 1764 | } |
| 1765 | |
| 1766 | static void dummy_pdev_remove (void) |
| 1767 | { |
| 1768 | platform_device_unregister (&the_pdev); |
| 1769 | driver_unregister (&dummy_driver); |
| 1770 | } |
| 1771 | |
| 1772 | /*-------------------------------------------------------------------------*/ |
| 1773 | |
| 1774 | static int __init init (void) |
| 1775 | { |
| 1776 | int retval; |
| 1777 | |
| 1778 | if (usb_disabled ()) |
| 1779 | return -ENODEV; |
| 1780 | if ((retval = dummy_pdev_detect ()) != 0) |
| 1781 | return retval; |
| 1782 | if ((retval = dummy_probe (&the_pdev.dev)) != 0) |
| 1783 | dummy_pdev_remove (); |
| 1784 | return retval; |
| 1785 | } |
| 1786 | module_init (init); |
| 1787 | |
| 1788 | static void __exit cleanup (void) |
| 1789 | { |
| 1790 | dummy_remove (&the_pdev.dev); |
| 1791 | dummy_pdev_remove (); |
| 1792 | } |
| 1793 | module_exit (cleanup); |