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 | |
Alan Stern | d9b7625 | 2005-05-03 16:15:43 -0400 | [diff] [blame] | 144 | /*-------------------------------------------------------------------------*/ |
| 145 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 146 | #define FIFO_SIZE 64 |
| 147 | |
| 148 | struct urbp { |
| 149 | struct urb *urb; |
| 150 | struct list_head urbp_list; |
| 151 | }; |
| 152 | |
| 153 | struct dummy { |
| 154 | spinlock_t lock; |
| 155 | |
| 156 | /* |
| 157 | * SLAVE/GADGET side support |
| 158 | */ |
| 159 | struct dummy_ep ep [DUMMY_ENDPOINTS]; |
| 160 | int address; |
| 161 | struct usb_gadget gadget; |
| 162 | struct usb_gadget_driver *driver; |
| 163 | struct dummy_request fifo_req; |
| 164 | u8 fifo_buf [FIFO_SIZE]; |
| 165 | u16 devstatus; |
Alan Stern | f1c39fa | 2005-05-03 16:24:04 -0400 | [diff] [blame^] | 166 | unsigned pullup:1; |
| 167 | unsigned active:1; |
| 168 | unsigned old_active:1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 169 | |
| 170 | /* |
| 171 | * MASTER/HOST side support |
| 172 | */ |
| 173 | struct timer_list timer; |
| 174 | u32 port_status; |
Alan Stern | f1c39fa | 2005-05-03 16:24:04 -0400 | [diff] [blame^] | 175 | u32 old_status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 176 | unsigned resuming:1; |
| 177 | unsigned long re_timeout; |
| 178 | |
| 179 | struct usb_device *udev; |
| 180 | struct list_head urbp_list; |
| 181 | }; |
| 182 | |
| 183 | static inline struct dummy *hcd_to_dummy (struct usb_hcd *hcd) |
| 184 | { |
| 185 | return (struct dummy *) (hcd->hcd_priv); |
| 186 | } |
| 187 | |
| 188 | static inline struct usb_hcd *dummy_to_hcd (struct dummy *dum) |
| 189 | { |
| 190 | return container_of((void *) dum, struct usb_hcd, hcd_priv); |
| 191 | } |
| 192 | |
| 193 | static inline struct device *dummy_dev (struct dummy *dum) |
| 194 | { |
| 195 | return dummy_to_hcd(dum)->self.controller; |
| 196 | } |
| 197 | |
Alan Stern | d9b7625 | 2005-05-03 16:15:43 -0400 | [diff] [blame] | 198 | static inline struct device *udc_dev (struct dummy *dum) |
| 199 | { |
| 200 | return dum->gadget.dev.parent; |
| 201 | } |
| 202 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 203 | static inline struct dummy *ep_to_dummy (struct dummy_ep *ep) |
| 204 | { |
| 205 | return container_of (ep->gadget, struct dummy, gadget); |
| 206 | } |
| 207 | |
| 208 | static inline struct dummy *gadget_to_dummy (struct usb_gadget *gadget) |
| 209 | { |
| 210 | return container_of (gadget, struct dummy, gadget); |
| 211 | } |
| 212 | |
| 213 | static inline struct dummy *gadget_dev_to_dummy (struct device *dev) |
| 214 | { |
| 215 | return container_of (dev, struct dummy, gadget.dev); |
| 216 | } |
| 217 | |
| 218 | static struct dummy *the_controller; |
| 219 | |
| 220 | /*-------------------------------------------------------------------------*/ |
| 221 | |
Alan Stern | f1c39fa | 2005-05-03 16:24:04 -0400 | [diff] [blame^] | 222 | /* SLAVE/GADGET SIDE UTILITY ROUTINES */ |
| 223 | |
| 224 | /* called with spinlock held */ |
| 225 | static void nuke (struct dummy *dum, struct dummy_ep *ep) |
| 226 | { |
| 227 | while (!list_empty (&ep->queue)) { |
| 228 | struct dummy_request *req; |
| 229 | |
| 230 | req = list_entry (ep->queue.next, struct dummy_request, queue); |
| 231 | list_del_init (&req->queue); |
| 232 | req->req.status = -ESHUTDOWN; |
| 233 | |
| 234 | spin_unlock (&dum->lock); |
| 235 | req->req.complete (&ep->ep, &req->req); |
| 236 | spin_lock (&dum->lock); |
| 237 | } |
| 238 | } |
| 239 | |
| 240 | /* caller must hold lock */ |
| 241 | static void |
| 242 | stop_activity (struct dummy *dum) |
| 243 | { |
| 244 | struct dummy_ep *ep; |
| 245 | |
| 246 | /* prevent any more requests */ |
| 247 | dum->address = 0; |
| 248 | |
| 249 | /* The timer is left running so that outstanding URBs can fail */ |
| 250 | |
| 251 | /* nuke any pending requests first, so driver i/o is quiesced */ |
| 252 | list_for_each_entry (ep, &dum->gadget.ep_list, ep.ep_list) |
| 253 | nuke (dum, ep); |
| 254 | |
| 255 | /* driver now does any non-usb quiescing necessary */ |
| 256 | } |
| 257 | |
| 258 | /* caller must hold lock */ |
| 259 | static void |
| 260 | set_link_state (struct dummy *dum) |
| 261 | { |
| 262 | dum->active = 0; |
| 263 | if ((dum->port_status & USB_PORT_STAT_POWER) == 0) |
| 264 | dum->port_status = 0; |
| 265 | else if (!dum->pullup) { |
| 266 | dum->port_status &= ~(USB_PORT_STAT_CONNECTION | |
| 267 | USB_PORT_STAT_ENABLE | |
| 268 | USB_PORT_STAT_LOW_SPEED | |
| 269 | USB_PORT_STAT_HIGH_SPEED | |
| 270 | USB_PORT_STAT_SUSPEND); |
| 271 | if ((dum->old_status & USB_PORT_STAT_CONNECTION) != 0) |
| 272 | dum->port_status |= (USB_PORT_STAT_C_CONNECTION << 16); |
| 273 | } else { |
| 274 | dum->port_status |= USB_PORT_STAT_CONNECTION; |
| 275 | if ((dum->old_status & USB_PORT_STAT_CONNECTION) == 0) |
| 276 | dum->port_status |= (USB_PORT_STAT_C_CONNECTION << 16); |
| 277 | if ((dum->port_status & USB_PORT_STAT_ENABLE) == 0) |
| 278 | dum->port_status &= ~USB_PORT_STAT_SUSPEND; |
| 279 | else if ((dum->port_status & USB_PORT_STAT_SUSPEND) == 0) |
| 280 | dum->active = 1; |
| 281 | } |
| 282 | |
| 283 | if ((dum->port_status & USB_PORT_STAT_ENABLE) == 0 || dum->active) |
| 284 | dum->resuming = 0; |
| 285 | |
| 286 | if ((dum->port_status & USB_PORT_STAT_CONNECTION) == 0 || |
| 287 | (dum->port_status & USB_PORT_STAT_RESET) != 0) { |
| 288 | if ((dum->old_status & USB_PORT_STAT_CONNECTION) != 0 && |
| 289 | (dum->old_status & USB_PORT_STAT_RESET) == 0 && |
| 290 | dum->driver) { |
| 291 | stop_activity (dum); |
| 292 | spin_unlock (&dum->lock); |
| 293 | dum->driver->disconnect (&dum->gadget); |
| 294 | spin_lock (&dum->lock); |
| 295 | } |
| 296 | } else if (dum->active != dum->old_active) { |
| 297 | if (dum->old_active && dum->driver->suspend) { |
| 298 | spin_unlock (&dum->lock); |
| 299 | dum->driver->suspend (&dum->gadget); |
| 300 | spin_lock (&dum->lock); |
| 301 | } else if (!dum->old_active && dum->driver->resume) { |
| 302 | spin_unlock (&dum->lock); |
| 303 | dum->driver->resume (&dum->gadget); |
| 304 | spin_lock (&dum->lock); |
| 305 | } |
| 306 | } |
| 307 | |
| 308 | dum->old_status = dum->port_status; |
| 309 | dum->old_active = dum->active; |
| 310 | } |
| 311 | |
| 312 | /*-------------------------------------------------------------------------*/ |
| 313 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 314 | /* SLAVE/GADGET SIDE DRIVER |
| 315 | * |
| 316 | * This only tracks gadget state. All the work is done when the host |
| 317 | * side tries some (emulated) i/o operation. Real device controller |
| 318 | * drivers would do real i/o using dma, fifos, irqs, timers, etc. |
| 319 | */ |
| 320 | |
| 321 | #define is_enabled(dum) \ |
| 322 | (dum->port_status & USB_PORT_STAT_ENABLE) |
| 323 | |
| 324 | static int |
| 325 | dummy_enable (struct usb_ep *_ep, const struct usb_endpoint_descriptor *desc) |
| 326 | { |
| 327 | struct dummy *dum; |
| 328 | struct dummy_ep *ep; |
| 329 | unsigned max; |
| 330 | int retval; |
| 331 | |
| 332 | ep = usb_ep_to_dummy_ep (_ep); |
| 333 | if (!_ep || !desc || ep->desc || _ep->name == ep0name |
| 334 | || desc->bDescriptorType != USB_DT_ENDPOINT) |
| 335 | return -EINVAL; |
| 336 | dum = ep_to_dummy (ep); |
| 337 | if (!dum->driver || !is_enabled (dum)) |
| 338 | return -ESHUTDOWN; |
| 339 | max = le16_to_cpu(desc->wMaxPacketSize) & 0x3ff; |
| 340 | |
| 341 | /* drivers must not request bad settings, since lower levels |
| 342 | * (hardware or its drivers) may not check. some endpoints |
| 343 | * can't do iso, many have maxpacket limitations, etc. |
| 344 | * |
| 345 | * since this "hardware" driver is here to help debugging, we |
| 346 | * have some extra sanity checks. (there could be more though, |
| 347 | * especially for "ep9out" style fixed function ones.) |
| 348 | */ |
| 349 | retval = -EINVAL; |
| 350 | switch (desc->bmAttributes & 0x03) { |
| 351 | case USB_ENDPOINT_XFER_BULK: |
| 352 | if (strstr (ep->ep.name, "-iso") |
| 353 | || strstr (ep->ep.name, "-int")) { |
| 354 | goto done; |
| 355 | } |
| 356 | switch (dum->gadget.speed) { |
| 357 | case USB_SPEED_HIGH: |
| 358 | if (max == 512) |
| 359 | break; |
| 360 | /* conserve return statements */ |
| 361 | default: |
| 362 | switch (max) { |
| 363 | case 8: case 16: case 32: case 64: |
| 364 | /* we'll fake any legal size */ |
| 365 | break; |
| 366 | default: |
| 367 | case USB_SPEED_LOW: |
| 368 | goto done; |
| 369 | } |
| 370 | } |
| 371 | break; |
| 372 | case USB_ENDPOINT_XFER_INT: |
| 373 | if (strstr (ep->ep.name, "-iso")) /* bulk is ok */ |
| 374 | goto done; |
| 375 | /* real hardware might not handle all packet sizes */ |
| 376 | switch (dum->gadget.speed) { |
| 377 | case USB_SPEED_HIGH: |
| 378 | if (max <= 1024) |
| 379 | break; |
| 380 | /* save a return statement */ |
| 381 | case USB_SPEED_FULL: |
| 382 | if (max <= 64) |
| 383 | break; |
| 384 | /* save a return statement */ |
| 385 | default: |
| 386 | if (max <= 8) |
| 387 | break; |
| 388 | goto done; |
| 389 | } |
| 390 | break; |
| 391 | case USB_ENDPOINT_XFER_ISOC: |
| 392 | if (strstr (ep->ep.name, "-bulk") |
| 393 | || strstr (ep->ep.name, "-int")) |
| 394 | goto done; |
| 395 | /* real hardware might not handle all packet sizes */ |
| 396 | switch (dum->gadget.speed) { |
| 397 | case USB_SPEED_HIGH: |
| 398 | if (max <= 1024) |
| 399 | break; |
| 400 | /* save a return statement */ |
| 401 | case USB_SPEED_FULL: |
| 402 | if (max <= 1023) |
| 403 | break; |
| 404 | /* save a return statement */ |
| 405 | default: |
| 406 | goto done; |
| 407 | } |
| 408 | break; |
| 409 | default: |
| 410 | /* few chips support control except on ep0 */ |
| 411 | goto done; |
| 412 | } |
| 413 | |
| 414 | _ep->maxpacket = max; |
| 415 | ep->desc = desc; |
| 416 | |
Alan Stern | d9b7625 | 2005-05-03 16:15:43 -0400 | [diff] [blame] | 417 | dev_dbg (udc_dev(dum), "enabled %s (ep%d%s-%s) maxpacket %d\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 418 | _ep->name, |
| 419 | desc->bEndpointAddress & 0x0f, |
| 420 | (desc->bEndpointAddress & USB_DIR_IN) ? "in" : "out", |
| 421 | ({ char *val; |
| 422 | switch (desc->bmAttributes & 0x03) { |
| 423 | case USB_ENDPOINT_XFER_BULK: val = "bulk"; break; |
| 424 | case USB_ENDPOINT_XFER_ISOC: val = "iso"; break; |
| 425 | case USB_ENDPOINT_XFER_INT: val = "intr"; break; |
| 426 | default: val = "ctrl"; break; |
| 427 | }; val; }), |
| 428 | max); |
| 429 | |
| 430 | /* at this point real hardware should be NAKing transfers |
| 431 | * to that endpoint, until a buffer is queued to it. |
| 432 | */ |
| 433 | retval = 0; |
| 434 | done: |
| 435 | return retval; |
| 436 | } |
| 437 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 438 | static int dummy_disable (struct usb_ep *_ep) |
| 439 | { |
| 440 | struct dummy_ep *ep; |
| 441 | struct dummy *dum; |
| 442 | unsigned long flags; |
| 443 | int retval; |
| 444 | |
| 445 | ep = usb_ep_to_dummy_ep (_ep); |
| 446 | if (!_ep || !ep->desc || _ep->name == ep0name) |
| 447 | return -EINVAL; |
| 448 | dum = ep_to_dummy (ep); |
| 449 | |
| 450 | spin_lock_irqsave (&dum->lock, flags); |
| 451 | ep->desc = NULL; |
| 452 | retval = 0; |
| 453 | nuke (dum, ep); |
| 454 | spin_unlock_irqrestore (&dum->lock, flags); |
| 455 | |
Alan Stern | d9b7625 | 2005-05-03 16:15:43 -0400 | [diff] [blame] | 456 | dev_dbg (udc_dev(dum), "disabled %s\n", _ep->name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 457 | return retval; |
| 458 | } |
| 459 | |
| 460 | static struct usb_request * |
| 461 | dummy_alloc_request (struct usb_ep *_ep, int mem_flags) |
| 462 | { |
| 463 | struct dummy_ep *ep; |
| 464 | struct dummy_request *req; |
| 465 | |
| 466 | if (!_ep) |
| 467 | return NULL; |
| 468 | ep = usb_ep_to_dummy_ep (_ep); |
| 469 | |
| 470 | req = kmalloc (sizeof *req, mem_flags); |
| 471 | if (!req) |
| 472 | return NULL; |
| 473 | memset (req, 0, sizeof *req); |
| 474 | INIT_LIST_HEAD (&req->queue); |
| 475 | return &req->req; |
| 476 | } |
| 477 | |
| 478 | static void |
| 479 | dummy_free_request (struct usb_ep *_ep, struct usb_request *_req) |
| 480 | { |
| 481 | struct dummy_ep *ep; |
| 482 | struct dummy_request *req; |
| 483 | |
| 484 | ep = usb_ep_to_dummy_ep (_ep); |
| 485 | if (!ep || !_req || (!ep->desc && _ep->name != ep0name)) |
| 486 | return; |
| 487 | |
| 488 | req = usb_request_to_dummy_request (_req); |
| 489 | WARN_ON (!list_empty (&req->queue)); |
| 490 | kfree (req); |
| 491 | } |
| 492 | |
| 493 | static void * |
| 494 | dummy_alloc_buffer ( |
| 495 | struct usb_ep *_ep, |
| 496 | unsigned bytes, |
| 497 | dma_addr_t *dma, |
| 498 | int mem_flags |
| 499 | ) { |
| 500 | char *retval; |
| 501 | struct dummy_ep *ep; |
| 502 | struct dummy *dum; |
| 503 | |
| 504 | ep = usb_ep_to_dummy_ep (_ep); |
| 505 | dum = ep_to_dummy (ep); |
| 506 | |
| 507 | if (!dum->driver) |
| 508 | return NULL; |
| 509 | retval = kmalloc (bytes, mem_flags); |
| 510 | *dma = (dma_addr_t) retval; |
| 511 | return retval; |
| 512 | } |
| 513 | |
| 514 | static void |
| 515 | dummy_free_buffer ( |
| 516 | struct usb_ep *_ep, |
| 517 | void *buf, |
| 518 | dma_addr_t dma, |
| 519 | unsigned bytes |
| 520 | ) { |
| 521 | if (bytes) |
| 522 | kfree (buf); |
| 523 | } |
| 524 | |
| 525 | static void |
| 526 | fifo_complete (struct usb_ep *ep, struct usb_request *req) |
| 527 | { |
| 528 | } |
| 529 | |
| 530 | static int |
| 531 | dummy_queue (struct usb_ep *_ep, struct usb_request *_req, int mem_flags) |
| 532 | { |
| 533 | struct dummy_ep *ep; |
| 534 | struct dummy_request *req; |
| 535 | struct dummy *dum; |
| 536 | unsigned long flags; |
| 537 | |
| 538 | req = usb_request_to_dummy_request (_req); |
| 539 | if (!_req || !list_empty (&req->queue) || !_req->complete) |
| 540 | return -EINVAL; |
| 541 | |
| 542 | ep = usb_ep_to_dummy_ep (_ep); |
| 543 | if (!_ep || (!ep->desc && _ep->name != ep0name)) |
| 544 | return -EINVAL; |
| 545 | |
| 546 | dum = ep_to_dummy (ep); |
| 547 | if (!dum->driver || !is_enabled (dum)) |
| 548 | return -ESHUTDOWN; |
| 549 | |
| 550 | #if 0 |
Alan Stern | d9b7625 | 2005-05-03 16:15:43 -0400 | [diff] [blame] | 551 | dev_dbg (udc_dev(dum), "ep %p queue req %p to %s, len %d buf %p\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 552 | ep, _req, _ep->name, _req->length, _req->buf); |
| 553 | #endif |
| 554 | |
| 555 | _req->status = -EINPROGRESS; |
| 556 | _req->actual = 0; |
| 557 | spin_lock_irqsave (&dum->lock, flags); |
| 558 | |
| 559 | /* implement an emulated single-request FIFO */ |
| 560 | if (ep->desc && (ep->desc->bEndpointAddress & USB_DIR_IN) && |
| 561 | list_empty (&dum->fifo_req.queue) && |
| 562 | list_empty (&ep->queue) && |
| 563 | _req->length <= FIFO_SIZE) { |
| 564 | req = &dum->fifo_req; |
| 565 | req->req = *_req; |
| 566 | req->req.buf = dum->fifo_buf; |
| 567 | memcpy (dum->fifo_buf, _req->buf, _req->length); |
| 568 | req->req.context = dum; |
| 569 | req->req.complete = fifo_complete; |
| 570 | |
| 571 | spin_unlock (&dum->lock); |
| 572 | _req->actual = _req->length; |
| 573 | _req->status = 0; |
| 574 | _req->complete (_ep, _req); |
| 575 | spin_lock (&dum->lock); |
| 576 | } |
| 577 | list_add_tail (&req->queue, &ep->queue); |
| 578 | spin_unlock_irqrestore (&dum->lock, flags); |
| 579 | |
| 580 | /* real hardware would likely enable transfers here, in case |
| 581 | * it'd been left NAKing. |
| 582 | */ |
| 583 | return 0; |
| 584 | } |
| 585 | |
| 586 | static int dummy_dequeue (struct usb_ep *_ep, struct usb_request *_req) |
| 587 | { |
| 588 | struct dummy_ep *ep; |
| 589 | struct dummy *dum; |
| 590 | int retval = -EINVAL; |
| 591 | unsigned long flags; |
| 592 | struct dummy_request *req = NULL; |
| 593 | |
| 594 | if (!_ep || !_req) |
| 595 | return retval; |
| 596 | ep = usb_ep_to_dummy_ep (_ep); |
| 597 | dum = ep_to_dummy (ep); |
| 598 | |
| 599 | if (!dum->driver) |
| 600 | return -ESHUTDOWN; |
| 601 | |
| 602 | spin_lock_irqsave (&dum->lock, flags); |
| 603 | list_for_each_entry (req, &ep->queue, queue) { |
| 604 | if (&req->req == _req) { |
| 605 | list_del_init (&req->queue); |
| 606 | _req->status = -ECONNRESET; |
| 607 | retval = 0; |
| 608 | break; |
| 609 | } |
| 610 | } |
| 611 | spin_unlock_irqrestore (&dum->lock, flags); |
| 612 | |
| 613 | if (retval == 0) { |
Alan Stern | d9b7625 | 2005-05-03 16:15:43 -0400 | [diff] [blame] | 614 | dev_dbg (udc_dev(dum), |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 615 | "dequeued req %p from %s, len %d buf %p\n", |
| 616 | req, _ep->name, _req->length, _req->buf); |
| 617 | _req->complete (_ep, _req); |
| 618 | } |
| 619 | return retval; |
| 620 | } |
| 621 | |
| 622 | static int |
| 623 | dummy_set_halt (struct usb_ep *_ep, int value) |
| 624 | { |
| 625 | struct dummy_ep *ep; |
| 626 | struct dummy *dum; |
| 627 | |
| 628 | if (!_ep) |
| 629 | return -EINVAL; |
| 630 | ep = usb_ep_to_dummy_ep (_ep); |
| 631 | dum = ep_to_dummy (ep); |
| 632 | if (!dum->driver) |
| 633 | return -ESHUTDOWN; |
| 634 | if (!value) |
| 635 | ep->halted = 0; |
| 636 | else if (ep->desc && (ep->desc->bEndpointAddress & USB_DIR_IN) && |
| 637 | !list_empty (&ep->queue)) |
| 638 | return -EAGAIN; |
| 639 | else |
| 640 | ep->halted = 1; |
| 641 | /* FIXME clear emulated data toggle too */ |
| 642 | return 0; |
| 643 | } |
| 644 | |
| 645 | static const struct usb_ep_ops dummy_ep_ops = { |
| 646 | .enable = dummy_enable, |
| 647 | .disable = dummy_disable, |
| 648 | |
| 649 | .alloc_request = dummy_alloc_request, |
| 650 | .free_request = dummy_free_request, |
| 651 | |
| 652 | .alloc_buffer = dummy_alloc_buffer, |
| 653 | .free_buffer = dummy_free_buffer, |
| 654 | /* map, unmap, ... eventually hook the "generic" dma calls */ |
| 655 | |
| 656 | .queue = dummy_queue, |
| 657 | .dequeue = dummy_dequeue, |
| 658 | |
| 659 | .set_halt = dummy_set_halt, |
| 660 | }; |
| 661 | |
| 662 | /*-------------------------------------------------------------------------*/ |
| 663 | |
| 664 | /* there are both host and device side versions of this call ... */ |
| 665 | static int dummy_g_get_frame (struct usb_gadget *_gadget) |
| 666 | { |
| 667 | struct timeval tv; |
| 668 | |
| 669 | do_gettimeofday (&tv); |
| 670 | return tv.tv_usec / 1000; |
| 671 | } |
| 672 | |
| 673 | static int dummy_wakeup (struct usb_gadget *_gadget) |
| 674 | { |
| 675 | struct dummy *dum; |
| 676 | |
| 677 | dum = gadget_to_dummy (_gadget); |
Alan Stern | c2db8b5 | 2005-04-29 16:30:48 -0400 | [diff] [blame] | 678 | if (!(dum->port_status & USB_PORT_STAT_SUSPEND) |
Alan Stern | 5742b0c | 2005-05-02 11:25:17 -0400 | [diff] [blame] | 679 | || !(dum->devstatus & |
| 680 | ( (1 << USB_DEVICE_B_HNP_ENABLE) |
| 681 | | (1 << USB_DEVICE_REMOTE_WAKEUP)))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 682 | return -EINVAL; |
| 683 | |
| 684 | /* hub notices our request, issues downstream resume, etc */ |
| 685 | dum->resuming = 1; |
Alan Stern | f1c39fa | 2005-05-03 16:24:04 -0400 | [diff] [blame^] | 686 | dum->re_timeout = jiffies + msecs_to_jiffies(20); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 687 | return 0; |
| 688 | } |
| 689 | |
| 690 | static int dummy_set_selfpowered (struct usb_gadget *_gadget, int value) |
| 691 | { |
| 692 | struct dummy *dum; |
| 693 | |
| 694 | dum = gadget_to_dummy (_gadget); |
| 695 | if (value) |
| 696 | dum->devstatus |= (1 << USB_DEVICE_SELF_POWERED); |
| 697 | else |
| 698 | dum->devstatus &= ~(1 << USB_DEVICE_SELF_POWERED); |
| 699 | return 0; |
| 700 | } |
| 701 | |
Alan Stern | f1c39fa | 2005-05-03 16:24:04 -0400 | [diff] [blame^] | 702 | static int dummy_pullup (struct usb_gadget *_gadget, int value) |
| 703 | { |
| 704 | struct dummy *dum; |
| 705 | unsigned long flags; |
| 706 | |
| 707 | dum = gadget_to_dummy (_gadget); |
| 708 | spin_lock_irqsave (&dum->lock, flags); |
| 709 | dum->pullup = (value != 0); |
| 710 | set_link_state (dum); |
| 711 | spin_unlock_irqrestore (&dum->lock, flags); |
| 712 | return 0; |
| 713 | } |
| 714 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 715 | static const struct usb_gadget_ops dummy_ops = { |
| 716 | .get_frame = dummy_g_get_frame, |
| 717 | .wakeup = dummy_wakeup, |
| 718 | .set_selfpowered = dummy_set_selfpowered, |
Alan Stern | f1c39fa | 2005-05-03 16:24:04 -0400 | [diff] [blame^] | 719 | .pullup = dummy_pullup, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 720 | }; |
| 721 | |
| 722 | /*-------------------------------------------------------------------------*/ |
| 723 | |
| 724 | /* "function" sysfs attribute */ |
| 725 | static ssize_t |
Yani Ioannou | 10523b3 | 2005-05-17 06:43:37 -0400 | [diff] [blame] | 726 | show_function (struct device *dev, struct device_attribute *attr, char *buf) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 727 | { |
| 728 | struct dummy *dum = gadget_dev_to_dummy (dev); |
| 729 | |
| 730 | if (!dum->driver || !dum->driver->function) |
| 731 | return 0; |
| 732 | return scnprintf (buf, PAGE_SIZE, "%s\n", dum->driver->function); |
| 733 | } |
| 734 | DEVICE_ATTR (function, S_IRUGO, show_function, NULL); |
| 735 | |
| 736 | /*-------------------------------------------------------------------------*/ |
| 737 | |
| 738 | /* |
| 739 | * Driver registration/unregistration. |
| 740 | * |
| 741 | * This is basically hardware-specific; there's usually only one real USB |
| 742 | * device (not host) controller since that's how USB devices are intended |
| 743 | * to work. So most implementations of these api calls will rely on the |
| 744 | * fact that only one driver will ever bind to the hardware. But curious |
| 745 | * hardware can be built with discrete components, so the gadget API doesn't |
| 746 | * require that assumption. |
| 747 | * |
| 748 | * For this emulator, it might be convenient to create a usb slave device |
| 749 | * for each driver that registers: just add to a big root hub. |
| 750 | */ |
| 751 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 752 | int |
| 753 | usb_gadget_register_driver (struct usb_gadget_driver *driver) |
| 754 | { |
| 755 | struct dummy *dum = the_controller; |
| 756 | int retval, i; |
| 757 | |
| 758 | if (!dum) |
| 759 | return -EINVAL; |
| 760 | if (dum->driver) |
| 761 | return -EBUSY; |
| 762 | if (!driver->bind || !driver->unbind || !driver->setup |
| 763 | || driver->speed == USB_SPEED_UNKNOWN) |
| 764 | return -EINVAL; |
| 765 | |
| 766 | /* |
| 767 | * SLAVE side init ... the layer above hardware, which |
| 768 | * can't enumerate without help from the driver we're binding. |
| 769 | */ |
Alan Stern | 5742b0c | 2005-05-02 11:25:17 -0400 | [diff] [blame] | 770 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 771 | dum->devstatus = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 772 | |
| 773 | INIT_LIST_HEAD (&dum->gadget.ep_list); |
| 774 | for (i = 0; i < DUMMY_ENDPOINTS; i++) { |
| 775 | struct dummy_ep *ep = &dum->ep [i]; |
| 776 | |
| 777 | if (!ep_name [i]) |
| 778 | break; |
| 779 | ep->ep.name = ep_name [i]; |
| 780 | ep->ep.ops = &dummy_ep_ops; |
| 781 | list_add_tail (&ep->ep.ep_list, &dum->gadget.ep_list); |
| 782 | ep->halted = ep->already_seen = ep->setup_stage = 0; |
| 783 | ep->ep.maxpacket = ~0; |
| 784 | ep->last_io = jiffies; |
| 785 | ep->gadget = &dum->gadget; |
| 786 | ep->desc = NULL; |
| 787 | INIT_LIST_HEAD (&ep->queue); |
| 788 | } |
| 789 | |
| 790 | dum->gadget.ep0 = &dum->ep [0].ep; |
| 791 | dum->ep [0].ep.maxpacket = 64; |
| 792 | list_del_init (&dum->ep [0].ep.ep_list); |
| 793 | INIT_LIST_HEAD(&dum->fifo_req.queue); |
| 794 | |
| 795 | dum->driver = driver; |
| 796 | dum->gadget.dev.driver = &driver->driver; |
Alan Stern | d9b7625 | 2005-05-03 16:15:43 -0400 | [diff] [blame] | 797 | dev_dbg (udc_dev(dum), "binding gadget driver '%s'\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 798 | driver->driver.name); |
| 799 | if ((retval = driver->bind (&dum->gadget)) != 0) { |
| 800 | dum->driver = NULL; |
| 801 | dum->gadget.dev.driver = NULL; |
| 802 | return retval; |
| 803 | } |
| 804 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 805 | driver->driver.bus = dum->gadget.dev.parent->bus; |
| 806 | driver_register (&driver->driver); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 807 | device_bind_driver (&dum->gadget.dev); |
| 808 | |
| 809 | /* khubd will enumerate this in a while */ |
Alan Stern | f1c39fa | 2005-05-03 16:24:04 -0400 | [diff] [blame^] | 810 | spin_lock_irq (&dum->lock); |
| 811 | dum->pullup = 1; |
| 812 | set_link_state (dum); |
| 813 | spin_unlock_irq (&dum->lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 814 | return 0; |
| 815 | } |
| 816 | EXPORT_SYMBOL (usb_gadget_register_driver); |
| 817 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 818 | int |
| 819 | usb_gadget_unregister_driver (struct usb_gadget_driver *driver) |
| 820 | { |
| 821 | struct dummy *dum = the_controller; |
| 822 | unsigned long flags; |
| 823 | |
| 824 | if (!dum) |
| 825 | return -ENODEV; |
| 826 | if (!driver || driver != dum->driver) |
| 827 | return -EINVAL; |
| 828 | |
Alan Stern | d9b7625 | 2005-05-03 16:15:43 -0400 | [diff] [blame] | 829 | dev_dbg (udc_dev(dum), "unregister gadget driver '%s'\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 830 | driver->driver.name); |
| 831 | |
| 832 | spin_lock_irqsave (&dum->lock, flags); |
Alan Stern | f1c39fa | 2005-05-03 16:24:04 -0400 | [diff] [blame^] | 833 | dum->pullup = 0; |
| 834 | set_link_state (dum); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 835 | spin_unlock_irqrestore (&dum->lock, flags); |
| 836 | |
| 837 | driver->unbind (&dum->gadget); |
| 838 | dum->driver = NULL; |
| 839 | |
| 840 | device_release_driver (&dum->gadget.dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 841 | driver_unregister (&driver->driver); |
| 842 | |
Alan Stern | f1c39fa | 2005-05-03 16:24:04 -0400 | [diff] [blame^] | 843 | spin_lock_irqsave (&dum->lock, flags); |
| 844 | dum->pullup = 0; |
| 845 | set_link_state (dum); |
| 846 | spin_unlock_irqrestore (&dum->lock, flags); |
| 847 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 848 | return 0; |
| 849 | } |
| 850 | EXPORT_SYMBOL (usb_gadget_unregister_driver); |
| 851 | |
| 852 | #undef is_enabled |
| 853 | |
| 854 | int net2280_set_fifo_mode (struct usb_gadget *gadget, int mode) |
| 855 | { |
| 856 | return -ENOSYS; |
| 857 | } |
| 858 | EXPORT_SYMBOL (net2280_set_fifo_mode); |
| 859 | |
Alan Stern | d9b7625 | 2005-05-03 16:15:43 -0400 | [diff] [blame] | 860 | |
| 861 | /* The gadget structure is stored inside the hcd structure and will be |
| 862 | * released along with it. */ |
| 863 | static void |
| 864 | dummy_gadget_release (struct device *dev) |
| 865 | { |
| 866 | #if 0 /* usb_bus_put isn't EXPORTed! */ |
| 867 | struct dummy *dum = gadget_dev_to_dummy (dev); |
| 868 | |
| 869 | usb_bus_put (&dummy_to_hcd (dum)->self); |
| 870 | #endif |
| 871 | } |
| 872 | |
| 873 | static int dummy_udc_probe (struct device *dev) |
| 874 | { |
| 875 | struct dummy *dum = the_controller; |
| 876 | int rc; |
| 877 | |
| 878 | dum->gadget.name = gadget_name; |
| 879 | dum->gadget.ops = &dummy_ops; |
| 880 | dum->gadget.is_dualspeed = 1; |
| 881 | |
| 882 | /* maybe claim OTG support, though we won't complete HNP */ |
| 883 | dum->gadget.is_otg = (dummy_to_hcd(dum)->self.otg_port != 0); |
| 884 | |
| 885 | strcpy (dum->gadget.dev.bus_id, "gadget"); |
| 886 | dum->gadget.dev.parent = dev; |
| 887 | dum->gadget.dev.release = dummy_gadget_release; |
| 888 | rc = device_register (&dum->gadget.dev); |
| 889 | if (rc < 0) |
| 890 | return rc; |
| 891 | |
| 892 | #if 0 /* usb_bus_get isn't EXPORTed! */ |
| 893 | usb_bus_get (&dummy_to_hcd (dum)->self); |
| 894 | #endif |
| 895 | |
| 896 | dev_set_drvdata (dev, dum); |
| 897 | device_create_file (&dum->gadget.dev, &dev_attr_function); |
| 898 | return rc; |
| 899 | } |
| 900 | |
| 901 | static int dummy_udc_remove (struct device *dev) |
| 902 | { |
| 903 | struct dummy *dum = dev_get_drvdata (dev); |
| 904 | |
| 905 | dev_set_drvdata (dev, NULL); |
| 906 | device_remove_file (&dum->gadget.dev, &dev_attr_function); |
| 907 | device_unregister (&dum->gadget.dev); |
| 908 | return 0; |
| 909 | } |
| 910 | |
| 911 | static struct device_driver dummy_udc_driver = { |
| 912 | .name = (char *) gadget_name, |
| 913 | .bus = &platform_bus_type, |
| 914 | .probe = dummy_udc_probe, |
| 915 | .remove = dummy_udc_remove, |
| 916 | }; |
| 917 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 918 | /*-------------------------------------------------------------------------*/ |
| 919 | |
| 920 | /* MASTER/HOST SIDE DRIVER |
| 921 | * |
| 922 | * this uses the hcd framework to hook up to host side drivers. |
| 923 | * its root hub will only have one device, otherwise it acts like |
| 924 | * a normal host controller. |
| 925 | * |
| 926 | * when urbs are queued, they're just stuck on a list that we |
| 927 | * scan in a timer callback. that callback connects writes from |
| 928 | * the host with reads from the device, and so on, based on the |
| 929 | * usb 2.0 rules. |
| 930 | */ |
| 931 | |
| 932 | static int dummy_urb_enqueue ( |
| 933 | struct usb_hcd *hcd, |
| 934 | struct usb_host_endpoint *ep, |
| 935 | struct urb *urb, |
| 936 | int mem_flags |
| 937 | ) { |
| 938 | struct dummy *dum; |
| 939 | struct urbp *urbp; |
| 940 | unsigned long flags; |
| 941 | |
| 942 | if (!urb->transfer_buffer && urb->transfer_buffer_length) |
| 943 | return -EINVAL; |
| 944 | |
| 945 | urbp = kmalloc (sizeof *urbp, mem_flags); |
| 946 | if (!urbp) |
| 947 | return -ENOMEM; |
| 948 | urbp->urb = urb; |
| 949 | |
| 950 | dum = hcd_to_dummy (hcd); |
| 951 | spin_lock_irqsave (&dum->lock, flags); |
| 952 | |
| 953 | if (!dum->udev) { |
| 954 | dum->udev = urb->dev; |
| 955 | usb_get_dev (dum->udev); |
| 956 | } else if (unlikely (dum->udev != urb->dev)) |
| 957 | dev_err (dummy_dev(dum), "usb_device address has changed!\n"); |
| 958 | |
| 959 | list_add_tail (&urbp->urbp_list, &dum->urbp_list); |
| 960 | urb->hcpriv = urbp; |
| 961 | if (usb_pipetype (urb->pipe) == PIPE_CONTROL) |
| 962 | urb->error_count = 1; /* mark as a new urb */ |
| 963 | |
| 964 | /* kick the scheduler, it'll do the rest */ |
| 965 | if (!timer_pending (&dum->timer)) |
| 966 | mod_timer (&dum->timer, jiffies + 1); |
| 967 | |
| 968 | spin_unlock_irqrestore (&dum->lock, flags); |
| 969 | return 0; |
| 970 | } |
| 971 | |
| 972 | static int dummy_urb_dequeue (struct usb_hcd *hcd, struct urb *urb) |
| 973 | { |
| 974 | /* giveback happens automatically in timer callback */ |
| 975 | return 0; |
| 976 | } |
| 977 | |
| 978 | static void maybe_set_status (struct urb *urb, int status) |
| 979 | { |
| 980 | spin_lock (&urb->lock); |
| 981 | if (urb->status == -EINPROGRESS) |
| 982 | urb->status = status; |
| 983 | spin_unlock (&urb->lock); |
| 984 | } |
| 985 | |
| 986 | /* transfer up to a frame's worth; caller must own lock */ |
| 987 | static int |
| 988 | transfer (struct dummy *dum, struct urb *urb, struct dummy_ep *ep, int limit) |
| 989 | { |
| 990 | struct dummy_request *req; |
| 991 | |
| 992 | top: |
| 993 | /* if there's no request queued, the device is NAKing; return */ |
| 994 | list_for_each_entry (req, &ep->queue, queue) { |
| 995 | unsigned host_len, dev_len, len; |
| 996 | int is_short, to_host; |
| 997 | int rescan = 0; |
| 998 | |
| 999 | /* 1..N packets of ep->ep.maxpacket each ... the last one |
| 1000 | * may be short (including zero length). |
| 1001 | * |
| 1002 | * writer can send a zlp explicitly (length 0) or implicitly |
| 1003 | * (length mod maxpacket zero, and 'zero' flag); they always |
| 1004 | * terminate reads. |
| 1005 | */ |
| 1006 | host_len = urb->transfer_buffer_length - urb->actual_length; |
| 1007 | dev_len = req->req.length - req->req.actual; |
| 1008 | len = min (host_len, dev_len); |
| 1009 | |
| 1010 | /* FIXME update emulated data toggle too */ |
| 1011 | |
| 1012 | to_host = usb_pipein (urb->pipe); |
| 1013 | if (unlikely (len == 0)) |
| 1014 | is_short = 1; |
| 1015 | else { |
| 1016 | char *ubuf, *rbuf; |
| 1017 | |
| 1018 | /* not enough bandwidth left? */ |
| 1019 | if (limit < ep->ep.maxpacket && limit < len) |
| 1020 | break; |
| 1021 | len = min (len, (unsigned) limit); |
| 1022 | if (len == 0) |
| 1023 | break; |
| 1024 | |
| 1025 | /* use an extra pass for the final short packet */ |
| 1026 | if (len > ep->ep.maxpacket) { |
| 1027 | rescan = 1; |
| 1028 | len -= (len % ep->ep.maxpacket); |
| 1029 | } |
| 1030 | is_short = (len % ep->ep.maxpacket) != 0; |
| 1031 | |
| 1032 | /* else transfer packet(s) */ |
| 1033 | ubuf = urb->transfer_buffer + urb->actual_length; |
| 1034 | rbuf = req->req.buf + req->req.actual; |
| 1035 | if (to_host) |
| 1036 | memcpy (ubuf, rbuf, len); |
| 1037 | else |
| 1038 | memcpy (rbuf, ubuf, len); |
| 1039 | ep->last_io = jiffies; |
| 1040 | |
| 1041 | limit -= len; |
| 1042 | urb->actual_length += len; |
| 1043 | req->req.actual += len; |
| 1044 | } |
| 1045 | |
| 1046 | /* short packets terminate, maybe with overflow/underflow. |
| 1047 | * it's only really an error to write too much. |
| 1048 | * |
| 1049 | * partially filling a buffer optionally blocks queue advances |
| 1050 | * (so completion handlers can clean up the queue) but we don't |
| 1051 | * need to emulate such data-in-flight. so we only show part |
| 1052 | * of the URB_SHORT_NOT_OK effect: completion status. |
| 1053 | */ |
| 1054 | if (is_short) { |
| 1055 | if (host_len == dev_len) { |
| 1056 | req->req.status = 0; |
| 1057 | maybe_set_status (urb, 0); |
| 1058 | } else if (to_host) { |
| 1059 | req->req.status = 0; |
| 1060 | if (dev_len > host_len) |
| 1061 | maybe_set_status (urb, -EOVERFLOW); |
| 1062 | else |
| 1063 | maybe_set_status (urb, |
| 1064 | (urb->transfer_flags |
| 1065 | & URB_SHORT_NOT_OK) |
| 1066 | ? -EREMOTEIO : 0); |
| 1067 | } else if (!to_host) { |
| 1068 | maybe_set_status (urb, 0); |
| 1069 | if (host_len > dev_len) |
| 1070 | req->req.status = -EOVERFLOW; |
| 1071 | else |
| 1072 | req->req.status = 0; |
| 1073 | } |
| 1074 | |
| 1075 | /* many requests terminate without a short packet */ |
| 1076 | } else { |
| 1077 | if (req->req.length == req->req.actual |
| 1078 | && !req->req.zero) |
| 1079 | req->req.status = 0; |
| 1080 | if (urb->transfer_buffer_length == urb->actual_length |
| 1081 | && !(urb->transfer_flags |
| 1082 | & URB_ZERO_PACKET)) { |
| 1083 | maybe_set_status (urb, 0); |
| 1084 | } |
| 1085 | } |
| 1086 | |
| 1087 | /* device side completion --> continuable */ |
| 1088 | if (req->req.status != -EINPROGRESS) { |
| 1089 | list_del_init (&req->queue); |
| 1090 | |
| 1091 | spin_unlock (&dum->lock); |
| 1092 | req->req.complete (&ep->ep, &req->req); |
| 1093 | spin_lock (&dum->lock); |
| 1094 | |
| 1095 | /* requests might have been unlinked... */ |
| 1096 | rescan = 1; |
| 1097 | } |
| 1098 | |
| 1099 | /* host side completion --> terminate */ |
| 1100 | if (urb->status != -EINPROGRESS) |
| 1101 | break; |
| 1102 | |
| 1103 | /* rescan to continue with any other queued i/o */ |
| 1104 | if (rescan) |
| 1105 | goto top; |
| 1106 | } |
| 1107 | return limit; |
| 1108 | } |
| 1109 | |
| 1110 | static int periodic_bytes (struct dummy *dum, struct dummy_ep *ep) |
| 1111 | { |
| 1112 | int limit = ep->ep.maxpacket; |
| 1113 | |
| 1114 | if (dum->gadget.speed == USB_SPEED_HIGH) { |
| 1115 | int tmp; |
| 1116 | |
| 1117 | /* high bandwidth mode */ |
| 1118 | tmp = le16_to_cpu(ep->desc->wMaxPacketSize); |
| 1119 | tmp = le16_to_cpu (tmp); |
| 1120 | tmp = (tmp >> 11) & 0x03; |
| 1121 | tmp *= 8 /* applies to entire frame */; |
| 1122 | limit += limit * tmp; |
| 1123 | } |
| 1124 | return limit; |
| 1125 | } |
| 1126 | |
| 1127 | #define is_active(dum) ((dum->port_status & \ |
| 1128 | (USB_PORT_STAT_CONNECTION | USB_PORT_STAT_ENABLE | \ |
| 1129 | USB_PORT_STAT_SUSPEND)) \ |
| 1130 | == (USB_PORT_STAT_CONNECTION | USB_PORT_STAT_ENABLE)) |
| 1131 | |
| 1132 | static struct dummy_ep *find_endpoint (struct dummy *dum, u8 address) |
| 1133 | { |
| 1134 | int i; |
| 1135 | |
| 1136 | if (!is_active (dum)) |
| 1137 | return NULL; |
| 1138 | if ((address & ~USB_DIR_IN) == 0) |
| 1139 | return &dum->ep [0]; |
| 1140 | for (i = 1; i < DUMMY_ENDPOINTS; i++) { |
| 1141 | struct dummy_ep *ep = &dum->ep [i]; |
| 1142 | |
| 1143 | if (!ep->desc) |
| 1144 | continue; |
| 1145 | if (ep->desc->bEndpointAddress == address) |
| 1146 | return ep; |
| 1147 | } |
| 1148 | return NULL; |
| 1149 | } |
| 1150 | |
| 1151 | #undef is_active |
| 1152 | |
| 1153 | #define Dev_Request (USB_TYPE_STANDARD | USB_RECIP_DEVICE) |
| 1154 | #define Dev_InRequest (Dev_Request | USB_DIR_IN) |
| 1155 | #define Intf_Request (USB_TYPE_STANDARD | USB_RECIP_INTERFACE) |
| 1156 | #define Intf_InRequest (Intf_Request | USB_DIR_IN) |
| 1157 | #define Ep_Request (USB_TYPE_STANDARD | USB_RECIP_ENDPOINT) |
| 1158 | #define Ep_InRequest (Ep_Request | USB_DIR_IN) |
| 1159 | |
| 1160 | /* drive both sides of the transfers; looks like irq handlers to |
| 1161 | * both drivers except the callbacks aren't in_irq(). |
| 1162 | */ |
| 1163 | static void dummy_timer (unsigned long _dum) |
| 1164 | { |
| 1165 | struct dummy *dum = (struct dummy *) _dum; |
| 1166 | struct urbp *urbp, *tmp; |
| 1167 | unsigned long flags; |
| 1168 | int limit, total; |
| 1169 | int i; |
| 1170 | |
| 1171 | /* simplistic model for one frame's bandwidth */ |
| 1172 | switch (dum->gadget.speed) { |
| 1173 | case USB_SPEED_LOW: |
| 1174 | total = 8/*bytes*/ * 12/*packets*/; |
| 1175 | break; |
| 1176 | case USB_SPEED_FULL: |
| 1177 | total = 64/*bytes*/ * 19/*packets*/; |
| 1178 | break; |
| 1179 | case USB_SPEED_HIGH: |
| 1180 | total = 512/*bytes*/ * 13/*packets*/ * 8/*uframes*/; |
| 1181 | break; |
| 1182 | default: |
| 1183 | dev_err (dummy_dev(dum), "bogus device speed\n"); |
| 1184 | return; |
| 1185 | } |
| 1186 | |
| 1187 | /* FIXME if HZ != 1000 this will probably misbehave ... */ |
| 1188 | |
| 1189 | /* look at each urb queued by the host side driver */ |
| 1190 | spin_lock_irqsave (&dum->lock, flags); |
| 1191 | |
| 1192 | if (!dum->udev) { |
| 1193 | dev_err (dummy_dev(dum), |
| 1194 | "timer fired with no URBs pending?\n"); |
| 1195 | spin_unlock_irqrestore (&dum->lock, flags); |
| 1196 | return; |
| 1197 | } |
| 1198 | |
| 1199 | for (i = 0; i < DUMMY_ENDPOINTS; i++) { |
| 1200 | if (!ep_name [i]) |
| 1201 | break; |
| 1202 | dum->ep [i].already_seen = 0; |
| 1203 | } |
| 1204 | |
| 1205 | restart: |
| 1206 | list_for_each_entry_safe (urbp, tmp, &dum->urbp_list, urbp_list) { |
| 1207 | struct urb *urb; |
| 1208 | struct dummy_request *req; |
| 1209 | u8 address; |
| 1210 | struct dummy_ep *ep = NULL; |
| 1211 | int type; |
| 1212 | |
| 1213 | urb = urbp->urb; |
| 1214 | if (urb->status != -EINPROGRESS) { |
| 1215 | /* likely it was just unlinked */ |
| 1216 | goto return_urb; |
| 1217 | } |
| 1218 | type = usb_pipetype (urb->pipe); |
| 1219 | |
| 1220 | /* used up this frame's non-periodic bandwidth? |
| 1221 | * FIXME there's infinite bandwidth for control and |
| 1222 | * periodic transfers ... unrealistic. |
| 1223 | */ |
| 1224 | if (total <= 0 && type == PIPE_BULK) |
| 1225 | continue; |
| 1226 | |
| 1227 | /* find the gadget's ep for this request (if configured) */ |
| 1228 | address = usb_pipeendpoint (urb->pipe); |
| 1229 | if (usb_pipein (urb->pipe)) |
| 1230 | address |= USB_DIR_IN; |
| 1231 | ep = find_endpoint(dum, address); |
| 1232 | if (!ep) { |
| 1233 | /* set_configuration() disagreement */ |
| 1234 | dev_dbg (dummy_dev(dum), |
| 1235 | "no ep configured for urb %p\n", |
| 1236 | urb); |
| 1237 | maybe_set_status (urb, -EPROTO); |
| 1238 | goto return_urb; |
| 1239 | } |
| 1240 | |
| 1241 | if (ep->already_seen) |
| 1242 | continue; |
| 1243 | ep->already_seen = 1; |
| 1244 | if (ep == &dum->ep [0] && urb->error_count) { |
| 1245 | ep->setup_stage = 1; /* a new urb */ |
| 1246 | urb->error_count = 0; |
| 1247 | } |
| 1248 | if (ep->halted && !ep->setup_stage) { |
| 1249 | /* NOTE: must not be iso! */ |
| 1250 | dev_dbg (dummy_dev(dum), "ep %s halted, urb %p\n", |
| 1251 | ep->ep.name, urb); |
| 1252 | maybe_set_status (urb, -EPIPE); |
| 1253 | goto return_urb; |
| 1254 | } |
| 1255 | /* FIXME make sure both ends agree on maxpacket */ |
| 1256 | |
| 1257 | /* handle control requests */ |
| 1258 | if (ep == &dum->ep [0] && ep->setup_stage) { |
| 1259 | struct usb_ctrlrequest setup; |
| 1260 | int value = 1; |
| 1261 | struct dummy_ep *ep2; |
| 1262 | |
| 1263 | setup = *(struct usb_ctrlrequest*) urb->setup_packet; |
| 1264 | le16_to_cpus (&setup.wIndex); |
| 1265 | le16_to_cpus (&setup.wValue); |
| 1266 | le16_to_cpus (&setup.wLength); |
| 1267 | if (setup.wLength != urb->transfer_buffer_length) { |
| 1268 | maybe_set_status (urb, -EOVERFLOW); |
| 1269 | goto return_urb; |
| 1270 | } |
| 1271 | |
| 1272 | /* paranoia, in case of stale queued data */ |
| 1273 | list_for_each_entry (req, &ep->queue, queue) { |
| 1274 | list_del_init (&req->queue); |
| 1275 | req->req.status = -EOVERFLOW; |
Alan Stern | d9b7625 | 2005-05-03 16:15:43 -0400 | [diff] [blame] | 1276 | dev_dbg (udc_dev(dum), "stale req = %p\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1277 | req); |
| 1278 | |
| 1279 | spin_unlock (&dum->lock); |
| 1280 | req->req.complete (&ep->ep, &req->req); |
| 1281 | spin_lock (&dum->lock); |
| 1282 | ep->already_seen = 0; |
| 1283 | goto restart; |
| 1284 | } |
| 1285 | |
| 1286 | /* gadget driver never sees set_address or operations |
| 1287 | * on standard feature flags. some hardware doesn't |
| 1288 | * even expose them. |
| 1289 | */ |
| 1290 | ep->last_io = jiffies; |
| 1291 | ep->setup_stage = 0; |
| 1292 | ep->halted = 0; |
| 1293 | switch (setup.bRequest) { |
| 1294 | case USB_REQ_SET_ADDRESS: |
| 1295 | if (setup.bRequestType != Dev_Request) |
| 1296 | break; |
| 1297 | dum->address = setup.wValue; |
| 1298 | maybe_set_status (urb, 0); |
Alan Stern | d9b7625 | 2005-05-03 16:15:43 -0400 | [diff] [blame] | 1299 | dev_dbg (udc_dev(dum), "set_address = %d\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1300 | setup.wValue); |
| 1301 | value = 0; |
| 1302 | break; |
| 1303 | case USB_REQ_SET_FEATURE: |
| 1304 | if (setup.bRequestType == Dev_Request) { |
| 1305 | value = 0; |
| 1306 | switch (setup.wValue) { |
| 1307 | case USB_DEVICE_REMOTE_WAKEUP: |
| 1308 | break; |
Alan Stern | 5742b0c | 2005-05-02 11:25:17 -0400 | [diff] [blame] | 1309 | case USB_DEVICE_B_HNP_ENABLE: |
| 1310 | dum->gadget.b_hnp_enable = 1; |
| 1311 | break; |
| 1312 | case USB_DEVICE_A_HNP_SUPPORT: |
| 1313 | dum->gadget.a_hnp_support = 1; |
| 1314 | break; |
| 1315 | case USB_DEVICE_A_ALT_HNP_SUPPORT: |
| 1316 | dum->gadget.a_alt_hnp_support |
| 1317 | = 1; |
| 1318 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1319 | default: |
| 1320 | value = -EOPNOTSUPP; |
| 1321 | } |
| 1322 | if (value == 0) { |
| 1323 | dum->devstatus |= |
| 1324 | (1 << setup.wValue); |
| 1325 | maybe_set_status (urb, 0); |
| 1326 | } |
| 1327 | |
| 1328 | } else if (setup.bRequestType == Ep_Request) { |
| 1329 | // endpoint halt |
| 1330 | ep2 = find_endpoint (dum, |
| 1331 | setup.wIndex); |
| 1332 | if (!ep2) { |
| 1333 | value = -EOPNOTSUPP; |
| 1334 | break; |
| 1335 | } |
| 1336 | ep2->halted = 1; |
| 1337 | value = 0; |
| 1338 | maybe_set_status (urb, 0); |
| 1339 | } |
| 1340 | break; |
| 1341 | case USB_REQ_CLEAR_FEATURE: |
| 1342 | if (setup.bRequestType == Dev_Request) { |
| 1343 | switch (setup.wValue) { |
| 1344 | case USB_DEVICE_REMOTE_WAKEUP: |
| 1345 | dum->devstatus &= ~(1 << |
| 1346 | USB_DEVICE_REMOTE_WAKEUP); |
| 1347 | value = 0; |
| 1348 | maybe_set_status (urb, 0); |
| 1349 | break; |
| 1350 | default: |
| 1351 | value = -EOPNOTSUPP; |
| 1352 | break; |
| 1353 | } |
| 1354 | } else if (setup.bRequestType == Ep_Request) { |
| 1355 | // endpoint halt |
| 1356 | ep2 = find_endpoint (dum, |
| 1357 | setup.wIndex); |
| 1358 | if (!ep2) { |
| 1359 | value = -EOPNOTSUPP; |
| 1360 | break; |
| 1361 | } |
| 1362 | ep2->halted = 0; |
| 1363 | value = 0; |
| 1364 | maybe_set_status (urb, 0); |
| 1365 | } |
| 1366 | break; |
| 1367 | case USB_REQ_GET_STATUS: |
| 1368 | if (setup.bRequestType == Dev_InRequest |
| 1369 | || setup.bRequestType |
| 1370 | == Intf_InRequest |
| 1371 | || setup.bRequestType |
| 1372 | == Ep_InRequest |
| 1373 | ) { |
| 1374 | char *buf; |
| 1375 | |
| 1376 | // device: remote wakeup, selfpowered |
| 1377 | // interface: nothing |
| 1378 | // endpoint: halt |
| 1379 | buf = (char *)urb->transfer_buffer; |
| 1380 | if (urb->transfer_buffer_length > 0) { |
| 1381 | if (setup.bRequestType == |
| 1382 | Ep_InRequest) { |
| 1383 | ep2 = find_endpoint (dum, setup.wIndex); |
| 1384 | if (!ep2) { |
| 1385 | value = -EOPNOTSUPP; |
| 1386 | break; |
| 1387 | } |
| 1388 | buf [0] = ep2->halted; |
| 1389 | } else if (setup.bRequestType == |
| 1390 | Dev_InRequest) { |
| 1391 | buf [0] = (u8) |
| 1392 | dum->devstatus; |
| 1393 | } else |
| 1394 | buf [0] = 0; |
| 1395 | } |
| 1396 | if (urb->transfer_buffer_length > 1) |
| 1397 | buf [1] = 0; |
| 1398 | urb->actual_length = min (2, |
| 1399 | urb->transfer_buffer_length); |
| 1400 | value = 0; |
| 1401 | maybe_set_status (urb, 0); |
| 1402 | } |
| 1403 | break; |
| 1404 | } |
| 1405 | |
| 1406 | /* gadget driver handles all other requests. block |
| 1407 | * until setup() returns; no reentrancy issues etc. |
| 1408 | */ |
| 1409 | if (value > 0) { |
| 1410 | spin_unlock (&dum->lock); |
| 1411 | value = dum->driver->setup (&dum->gadget, |
| 1412 | &setup); |
| 1413 | spin_lock (&dum->lock); |
| 1414 | |
| 1415 | if (value >= 0) { |
| 1416 | /* no delays (max 64KB data stage) */ |
| 1417 | limit = 64*1024; |
| 1418 | goto treat_control_like_bulk; |
| 1419 | } |
| 1420 | /* error, see below */ |
| 1421 | } |
| 1422 | |
| 1423 | if (value < 0) { |
| 1424 | if (value != -EOPNOTSUPP) |
Alan Stern | d9b7625 | 2005-05-03 16:15:43 -0400 | [diff] [blame] | 1425 | dev_dbg (udc_dev(dum), |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1426 | "setup --> %d\n", |
| 1427 | value); |
| 1428 | maybe_set_status (urb, -EPIPE); |
| 1429 | urb->actual_length = 0; |
| 1430 | } |
| 1431 | |
| 1432 | goto return_urb; |
| 1433 | } |
| 1434 | |
| 1435 | /* non-control requests */ |
| 1436 | limit = total; |
| 1437 | switch (usb_pipetype (urb->pipe)) { |
| 1438 | case PIPE_ISOCHRONOUS: |
| 1439 | /* FIXME is it urb->interval since the last xfer? |
| 1440 | * use urb->iso_frame_desc[i]. |
| 1441 | * complete whether or not ep has requests queued. |
| 1442 | * report random errors, to debug drivers. |
| 1443 | */ |
| 1444 | limit = max (limit, periodic_bytes (dum, ep)); |
| 1445 | maybe_set_status (urb, -ENOSYS); |
| 1446 | break; |
| 1447 | |
| 1448 | case PIPE_INTERRUPT: |
| 1449 | /* FIXME is it urb->interval since the last xfer? |
| 1450 | * this almost certainly polls too fast. |
| 1451 | */ |
| 1452 | limit = max (limit, periodic_bytes (dum, ep)); |
| 1453 | /* FALLTHROUGH */ |
| 1454 | |
| 1455 | // case PIPE_BULK: case PIPE_CONTROL: |
| 1456 | default: |
| 1457 | treat_control_like_bulk: |
| 1458 | ep->last_io = jiffies; |
| 1459 | total = transfer (dum, urb, ep, limit); |
| 1460 | break; |
| 1461 | } |
| 1462 | |
| 1463 | /* incomplete transfer? */ |
| 1464 | if (urb->status == -EINPROGRESS) |
| 1465 | continue; |
| 1466 | |
| 1467 | return_urb: |
| 1468 | urb->hcpriv = NULL; |
| 1469 | list_del (&urbp->urbp_list); |
| 1470 | kfree (urbp); |
| 1471 | if (ep) |
| 1472 | ep->already_seen = ep->setup_stage = 0; |
| 1473 | |
| 1474 | spin_unlock (&dum->lock); |
| 1475 | usb_hcd_giveback_urb (dummy_to_hcd(dum), urb, NULL); |
| 1476 | spin_lock (&dum->lock); |
| 1477 | |
| 1478 | goto restart; |
| 1479 | } |
| 1480 | |
| 1481 | /* want a 1 msec delay here */ |
| 1482 | if (!list_empty (&dum->urbp_list)) |
| 1483 | mod_timer (&dum->timer, jiffies + msecs_to_jiffies(1)); |
| 1484 | else { |
| 1485 | usb_put_dev (dum->udev); |
| 1486 | dum->udev = NULL; |
| 1487 | } |
| 1488 | |
| 1489 | spin_unlock_irqrestore (&dum->lock, flags); |
| 1490 | } |
| 1491 | |
| 1492 | /*-------------------------------------------------------------------------*/ |
| 1493 | |
| 1494 | #define PORT_C_MASK \ |
Alan Stern | c2db8b5 | 2005-04-29 16:30:48 -0400 | [diff] [blame] | 1495 | ((USB_PORT_STAT_C_CONNECTION \ |
| 1496 | | USB_PORT_STAT_C_ENABLE \ |
| 1497 | | USB_PORT_STAT_C_SUSPEND \ |
| 1498 | | USB_PORT_STAT_C_OVERCURRENT \ |
| 1499 | | USB_PORT_STAT_C_RESET) << 16) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1500 | |
| 1501 | static int dummy_hub_status (struct usb_hcd *hcd, char *buf) |
| 1502 | { |
| 1503 | struct dummy *dum; |
| 1504 | unsigned long flags; |
| 1505 | int retval; |
| 1506 | |
| 1507 | dum = hcd_to_dummy (hcd); |
| 1508 | |
| 1509 | spin_lock_irqsave (&dum->lock, flags); |
Alan Stern | f1c39fa | 2005-05-03 16:24:04 -0400 | [diff] [blame^] | 1510 | |
| 1511 | if (dum->resuming && time_after_eq (jiffies, dum->re_timeout)) { |
| 1512 | dum->port_status |= (USB_PORT_STAT_C_SUSPEND << 16); |
| 1513 | dum->port_status &= ~USB_PORT_STAT_SUSPEND; |
| 1514 | set_link_state (dum); |
| 1515 | } |
| 1516 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1517 | if (!(dum->port_status & PORT_C_MASK)) |
| 1518 | retval = 0; |
| 1519 | else { |
| 1520 | *buf = (1 << 1); |
| 1521 | dev_dbg (dummy_dev(dum), "port status 0x%08x has changes\n", |
| 1522 | dum->port_status); |
| 1523 | retval = 1; |
| 1524 | } |
| 1525 | spin_unlock_irqrestore (&dum->lock, flags); |
| 1526 | return retval; |
| 1527 | } |
| 1528 | |
| 1529 | static inline void |
| 1530 | hub_descriptor (struct usb_hub_descriptor *desc) |
| 1531 | { |
| 1532 | memset (desc, 0, sizeof *desc); |
| 1533 | desc->bDescriptorType = 0x29; |
| 1534 | desc->bDescLength = 9; |
| 1535 | desc->wHubCharacteristics = __constant_cpu_to_le16 (0x0001); |
| 1536 | desc->bNbrPorts = 1; |
| 1537 | desc->bitmap [0] = 0xff; |
| 1538 | desc->bitmap [1] = 0xff; |
| 1539 | } |
| 1540 | |
| 1541 | static int dummy_hub_control ( |
| 1542 | struct usb_hcd *hcd, |
| 1543 | u16 typeReq, |
| 1544 | u16 wValue, |
| 1545 | u16 wIndex, |
| 1546 | char *buf, |
| 1547 | u16 wLength |
| 1548 | ) { |
| 1549 | struct dummy *dum; |
| 1550 | int retval = 0; |
| 1551 | unsigned long flags; |
| 1552 | |
| 1553 | dum = hcd_to_dummy (hcd); |
| 1554 | spin_lock_irqsave (&dum->lock, flags); |
| 1555 | switch (typeReq) { |
| 1556 | case ClearHubFeature: |
| 1557 | break; |
| 1558 | case ClearPortFeature: |
| 1559 | switch (wValue) { |
| 1560 | case USB_PORT_FEAT_SUSPEND: |
Alan Stern | c2db8b5 | 2005-04-29 16:30:48 -0400 | [diff] [blame] | 1561 | if (dum->port_status & USB_PORT_STAT_SUSPEND) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1562 | /* 20msec resume signaling */ |
| 1563 | dum->resuming = 1; |
| 1564 | dum->re_timeout = jiffies + |
Alan Stern | f1c39fa | 2005-05-03 16:24:04 -0400 | [diff] [blame^] | 1565 | msecs_to_jiffies(20); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1566 | } |
| 1567 | break; |
| 1568 | case USB_PORT_FEAT_POWER: |
Alan Stern | f1c39fa | 2005-05-03 16:24:04 -0400 | [diff] [blame^] | 1569 | if (dum->port_status & USB_PORT_STAT_POWER) |
| 1570 | dev_dbg (dummy_dev(dum), "power-off\n"); |
| 1571 | /* FALLS THROUGH */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1572 | default: |
| 1573 | dum->port_status &= ~(1 << wValue); |
Alan Stern | f1c39fa | 2005-05-03 16:24:04 -0400 | [diff] [blame^] | 1574 | set_link_state (dum); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1575 | } |
| 1576 | break; |
| 1577 | case GetHubDescriptor: |
| 1578 | hub_descriptor ((struct usb_hub_descriptor *) buf); |
| 1579 | break; |
| 1580 | case GetHubStatus: |
| 1581 | *(u32 *) buf = __constant_cpu_to_le32 (0); |
| 1582 | break; |
| 1583 | case GetPortStatus: |
| 1584 | if (wIndex != 1) |
| 1585 | retval = -EPIPE; |
| 1586 | |
| 1587 | /* whoever resets or resumes must GetPortStatus to |
| 1588 | * complete it!! |
| 1589 | */ |
Alan Stern | f1c39fa | 2005-05-03 16:24:04 -0400 | [diff] [blame^] | 1590 | if (dum->resuming && |
| 1591 | time_after_eq (jiffies, dum->re_timeout)) { |
Alan Stern | c2db8b5 | 2005-04-29 16:30:48 -0400 | [diff] [blame] | 1592 | dum->port_status |= (USB_PORT_STAT_C_SUSPEND << 16); |
| 1593 | dum->port_status &= ~USB_PORT_STAT_SUSPEND; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1594 | } |
Alan Stern | f1c39fa | 2005-05-03 16:24:04 -0400 | [diff] [blame^] | 1595 | if ((dum->port_status & USB_PORT_STAT_RESET) != 0 && |
| 1596 | time_after_eq (jiffies, dum->re_timeout)) { |
Alan Stern | c2db8b5 | 2005-04-29 16:30:48 -0400 | [diff] [blame] | 1597 | dum->port_status |= (USB_PORT_STAT_C_RESET << 16); |
| 1598 | dum->port_status &= ~USB_PORT_STAT_RESET; |
Alan Stern | f1c39fa | 2005-05-03 16:24:04 -0400 | [diff] [blame^] | 1599 | if (dum->pullup) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1600 | dum->port_status |= USB_PORT_STAT_ENABLE; |
| 1601 | /* give it the best speed we agree on */ |
| 1602 | dum->gadget.speed = dum->driver->speed; |
| 1603 | dum->gadget.ep0->maxpacket = 64; |
| 1604 | switch (dum->gadget.speed) { |
| 1605 | case USB_SPEED_HIGH: |
| 1606 | dum->port_status |= |
| 1607 | USB_PORT_STAT_HIGH_SPEED; |
| 1608 | break; |
| 1609 | case USB_SPEED_LOW: |
| 1610 | dum->gadget.ep0->maxpacket = 8; |
| 1611 | dum->port_status |= |
| 1612 | USB_PORT_STAT_LOW_SPEED; |
| 1613 | break; |
| 1614 | default: |
| 1615 | dum->gadget.speed = USB_SPEED_FULL; |
| 1616 | break; |
| 1617 | } |
| 1618 | } |
| 1619 | } |
Alan Stern | f1c39fa | 2005-05-03 16:24:04 -0400 | [diff] [blame^] | 1620 | set_link_state (dum); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1621 | ((u16 *) buf)[0] = cpu_to_le16 (dum->port_status); |
| 1622 | ((u16 *) buf)[1] = cpu_to_le16 (dum->port_status >> 16); |
| 1623 | break; |
| 1624 | case SetHubFeature: |
| 1625 | retval = -EPIPE; |
| 1626 | break; |
| 1627 | case SetPortFeature: |
| 1628 | switch (wValue) { |
| 1629 | case USB_PORT_FEAT_SUSPEND: |
Alan Stern | f1c39fa | 2005-05-03 16:24:04 -0400 | [diff] [blame^] | 1630 | if (dum->active) { |
Alan Stern | c2db8b5 | 2005-04-29 16:30:48 -0400 | [diff] [blame] | 1631 | dum->port_status |= USB_PORT_STAT_SUSPEND; |
Alan Stern | f1c39fa | 2005-05-03 16:24:04 -0400 | [diff] [blame^] | 1632 | |
| 1633 | /* HNP would happen here; for now we |
| 1634 | * assume b_bus_req is always true. |
| 1635 | */ |
| 1636 | set_link_state (dum); |
| 1637 | if (((1 << USB_DEVICE_B_HNP_ENABLE) |
| 1638 | & dum->devstatus) != 0) |
| 1639 | dev_dbg (dummy_dev(dum), |
Alan Stern | 5742b0c | 2005-05-02 11:25:17 -0400 | [diff] [blame] | 1640 | "no HNP yet!\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1641 | } |
| 1642 | break; |
Alan Stern | f1c39fa | 2005-05-03 16:24:04 -0400 | [diff] [blame^] | 1643 | case USB_PORT_FEAT_POWER: |
| 1644 | dum->port_status |= USB_PORT_STAT_POWER; |
| 1645 | set_link_state (dum); |
| 1646 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1647 | case USB_PORT_FEAT_RESET: |
Alan Stern | f1c39fa | 2005-05-03 16:24:04 -0400 | [diff] [blame^] | 1648 | /* if it's already enabled, disable */ |
| 1649 | dum->port_status &= ~(USB_PORT_STAT_ENABLE |
| 1650 | | USB_PORT_STAT_LOW_SPEED |
| 1651 | | USB_PORT_STAT_HIGH_SPEED); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1652 | /* 50msec reset signaling */ |
| 1653 | dum->re_timeout = jiffies + msecs_to_jiffies(50); |
Alan Stern | f1c39fa | 2005-05-03 16:24:04 -0400 | [diff] [blame^] | 1654 | /* FALLS THROUGH */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1655 | default: |
Alan Stern | f1c39fa | 2005-05-03 16:24:04 -0400 | [diff] [blame^] | 1656 | if ((dum->port_status & USB_PORT_STAT_POWER) != 0) { |
| 1657 | dum->port_status |= (1 << wValue); |
| 1658 | set_link_state (dum); |
| 1659 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1660 | } |
| 1661 | break; |
| 1662 | |
| 1663 | default: |
| 1664 | dev_dbg (dummy_dev(dum), |
| 1665 | "hub control req%04x v%04x i%04x l%d\n", |
| 1666 | typeReq, wValue, wIndex, wLength); |
| 1667 | |
| 1668 | /* "protocol stall" on error */ |
| 1669 | retval = -EPIPE; |
| 1670 | } |
| 1671 | spin_unlock_irqrestore (&dum->lock, flags); |
| 1672 | return retval; |
| 1673 | } |
| 1674 | |
| 1675 | |
| 1676 | /*-------------------------------------------------------------------------*/ |
| 1677 | |
| 1678 | static inline ssize_t |
| 1679 | show_urb (char *buf, size_t size, struct urb *urb) |
| 1680 | { |
| 1681 | int ep = usb_pipeendpoint (urb->pipe); |
| 1682 | |
| 1683 | return snprintf (buf, size, |
| 1684 | "urb/%p %s ep%d%s%s len %d/%d\n", |
| 1685 | urb, |
| 1686 | ({ char *s; |
| 1687 | switch (urb->dev->speed) { |
| 1688 | case USB_SPEED_LOW: s = "ls"; break; |
| 1689 | case USB_SPEED_FULL: s = "fs"; break; |
| 1690 | case USB_SPEED_HIGH: s = "hs"; break; |
| 1691 | default: s = "?"; break; |
| 1692 | }; s; }), |
| 1693 | ep, ep ? (usb_pipein (urb->pipe) ? "in" : "out") : "", |
| 1694 | ({ char *s; \ |
| 1695 | switch (usb_pipetype (urb->pipe)) { \ |
| 1696 | case PIPE_CONTROL: s = ""; break; \ |
| 1697 | case PIPE_BULK: s = "-bulk"; break; \ |
| 1698 | case PIPE_INTERRUPT: s = "-int"; break; \ |
| 1699 | default: s = "-iso"; break; \ |
| 1700 | }; s;}), |
| 1701 | urb->actual_length, urb->transfer_buffer_length); |
| 1702 | } |
| 1703 | |
| 1704 | static ssize_t |
Yani Ioannou | 10523b3 | 2005-05-17 06:43:37 -0400 | [diff] [blame] | 1705 | show_urbs (struct device *dev, struct device_attribute *attr, char *buf) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1706 | { |
| 1707 | struct usb_hcd *hcd = dev_get_drvdata (dev); |
| 1708 | struct dummy *dum = hcd_to_dummy (hcd); |
| 1709 | struct urbp *urbp; |
| 1710 | size_t size = 0; |
| 1711 | unsigned long flags; |
| 1712 | |
| 1713 | spin_lock_irqsave (&dum->lock, flags); |
| 1714 | list_for_each_entry (urbp, &dum->urbp_list, urbp_list) { |
| 1715 | size_t temp; |
| 1716 | |
| 1717 | temp = show_urb (buf, PAGE_SIZE - size, urbp->urb); |
| 1718 | buf += temp; |
| 1719 | size += temp; |
| 1720 | } |
| 1721 | spin_unlock_irqrestore (&dum->lock, flags); |
| 1722 | |
| 1723 | return size; |
| 1724 | } |
| 1725 | static DEVICE_ATTR (urbs, S_IRUGO, show_urbs, NULL); |
| 1726 | |
| 1727 | static int dummy_start (struct usb_hcd *hcd) |
| 1728 | { |
| 1729 | struct dummy *dum; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1730 | |
| 1731 | dum = hcd_to_dummy (hcd); |
| 1732 | |
| 1733 | /* |
| 1734 | * MASTER side init ... we emulate a root hub that'll only ever |
| 1735 | * talk to one device (the slave side). Also appears in sysfs, |
| 1736 | * just like more familiar pci-based HCDs. |
| 1737 | */ |
| 1738 | spin_lock_init (&dum->lock); |
| 1739 | init_timer (&dum->timer); |
| 1740 | dum->timer.function = dummy_timer; |
| 1741 | dum->timer.data = (unsigned long) dum; |
| 1742 | |
| 1743 | INIT_LIST_HEAD (&dum->urbp_list); |
| 1744 | |
Alan Stern | bc96c0a | 2005-04-25 11:21:31 -0400 | [diff] [blame] | 1745 | /* only show a low-power port: just 8mA */ |
| 1746 | hcd->power_budget = 8; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1747 | hcd->state = HC_STATE_RUNNING; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1748 | |
Alan Stern | 5742b0c | 2005-05-02 11:25:17 -0400 | [diff] [blame] | 1749 | #ifdef CONFIG_USB_OTG |
| 1750 | hcd->self.otg_port = 1; |
| 1751 | #endif |
| 1752 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1753 | /* FIXME 'urbs' should be a per-device thing, maybe in usbcore */ |
| 1754 | device_create_file (dummy_dev(dum), &dev_attr_urbs); |
| 1755 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1756 | } |
| 1757 | |
| 1758 | static void dummy_stop (struct usb_hcd *hcd) |
| 1759 | { |
| 1760 | struct dummy *dum; |
| 1761 | |
| 1762 | dum = hcd_to_dummy (hcd); |
| 1763 | |
| 1764 | device_remove_file (dummy_dev(dum), &dev_attr_urbs); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1765 | usb_gadget_unregister_driver (dum->driver); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1766 | dev_info (dummy_dev(dum), "stopped\n"); |
| 1767 | } |
| 1768 | |
| 1769 | /*-------------------------------------------------------------------------*/ |
| 1770 | |
| 1771 | static int dummy_h_get_frame (struct usb_hcd *hcd) |
| 1772 | { |
| 1773 | return dummy_g_get_frame (NULL); |
| 1774 | } |
| 1775 | |
| 1776 | static const struct hc_driver dummy_hcd = { |
| 1777 | .description = (char *) driver_name, |
| 1778 | .product_desc = "Dummy host controller", |
| 1779 | .hcd_priv_size = sizeof(struct dummy), |
| 1780 | |
| 1781 | .flags = HCD_USB2, |
| 1782 | |
| 1783 | .start = dummy_start, |
| 1784 | .stop = dummy_stop, |
| 1785 | |
| 1786 | .urb_enqueue = dummy_urb_enqueue, |
| 1787 | .urb_dequeue = dummy_urb_dequeue, |
| 1788 | |
| 1789 | .get_frame_number = dummy_h_get_frame, |
| 1790 | |
| 1791 | .hub_status_data = dummy_hub_status, |
| 1792 | .hub_control = dummy_hub_control, |
| 1793 | }; |
| 1794 | |
Alan Stern | d9b7625 | 2005-05-03 16:15:43 -0400 | [diff] [blame] | 1795 | static int dummy_hcd_probe (struct device *dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1796 | { |
| 1797 | struct usb_hcd *hcd; |
| 1798 | int retval; |
| 1799 | |
| 1800 | dev_info (dev, "%s, driver " DRIVER_VERSION "\n", driver_desc); |
| 1801 | |
| 1802 | hcd = usb_create_hcd (&dummy_hcd, dev, dev->bus_id); |
| 1803 | if (!hcd) |
| 1804 | return -ENOMEM; |
| 1805 | the_controller = hcd_to_dummy (hcd); |
| 1806 | |
| 1807 | retval = usb_add_hcd(hcd, 0, 0); |
| 1808 | if (retval != 0) { |
| 1809 | usb_put_hcd (hcd); |
| 1810 | the_controller = NULL; |
| 1811 | } |
| 1812 | return retval; |
| 1813 | } |
| 1814 | |
Alan Stern | d9b7625 | 2005-05-03 16:15:43 -0400 | [diff] [blame] | 1815 | static int dummy_hcd_remove (struct device *dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1816 | { |
| 1817 | struct usb_hcd *hcd; |
| 1818 | |
| 1819 | hcd = dev_get_drvdata (dev); |
| 1820 | usb_remove_hcd (hcd); |
| 1821 | usb_put_hcd (hcd); |
| 1822 | the_controller = NULL; |
Alan Stern | d9b7625 | 2005-05-03 16:15:43 -0400 | [diff] [blame] | 1823 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1824 | } |
| 1825 | |
Alan Stern | d9b7625 | 2005-05-03 16:15:43 -0400 | [diff] [blame] | 1826 | static struct device_driver dummy_hcd_driver = { |
| 1827 | .name = (char *) driver_name, |
| 1828 | .bus = &platform_bus_type, |
| 1829 | .probe = dummy_hcd_probe, |
| 1830 | .remove = dummy_hcd_remove, |
| 1831 | }; |
| 1832 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1833 | /*-------------------------------------------------------------------------*/ |
| 1834 | |
Alan Stern | d9b7625 | 2005-05-03 16:15:43 -0400 | [diff] [blame] | 1835 | /* These don't need to do anything because the pdev structures are |
| 1836 | * statically allocated. */ |
| 1837 | static void |
| 1838 | dummy_udc_release (struct device *dev) {} |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1839 | |
Alan Stern | d9b7625 | 2005-05-03 16:15:43 -0400 | [diff] [blame] | 1840 | static void |
| 1841 | dummy_hcd_release (struct device *dev) {} |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1842 | |
Alan Stern | d9b7625 | 2005-05-03 16:15:43 -0400 | [diff] [blame] | 1843 | static struct platform_device the_udc_pdev = { |
| 1844 | .name = (char *) gadget_name, |
| 1845 | .id = -1, |
| 1846 | .dev = { |
| 1847 | .release = dummy_udc_release, |
| 1848 | }, |
| 1849 | }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1850 | |
Alan Stern | d9b7625 | 2005-05-03 16:15:43 -0400 | [diff] [blame] | 1851 | static struct platform_device the_hcd_pdev = { |
| 1852 | .name = (char *) driver_name, |
| 1853 | .id = -1, |
| 1854 | .dev = { |
| 1855 | .release = dummy_hcd_release, |
| 1856 | }, |
| 1857 | }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1858 | |
| 1859 | static int __init init (void) |
| 1860 | { |
| 1861 | int retval; |
| 1862 | |
| 1863 | if (usb_disabled ()) |
| 1864 | return -ENODEV; |
Alan Stern | d9b7625 | 2005-05-03 16:15:43 -0400 | [diff] [blame] | 1865 | |
| 1866 | retval = driver_register (&dummy_hcd_driver); |
| 1867 | if (retval < 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1868 | return retval; |
Alan Stern | d9b7625 | 2005-05-03 16:15:43 -0400 | [diff] [blame] | 1869 | |
| 1870 | retval = driver_register (&dummy_udc_driver); |
| 1871 | if (retval < 0) |
| 1872 | goto err_register_udc_driver; |
| 1873 | |
| 1874 | retval = platform_device_register (&the_hcd_pdev); |
| 1875 | if (retval < 0) |
| 1876 | goto err_register_hcd; |
| 1877 | |
| 1878 | retval = platform_device_register (&the_udc_pdev); |
| 1879 | if (retval < 0) |
| 1880 | goto err_register_udc; |
| 1881 | return retval; |
| 1882 | |
| 1883 | err_register_udc: |
| 1884 | platform_device_unregister (&the_hcd_pdev); |
| 1885 | err_register_hcd: |
| 1886 | driver_unregister (&dummy_udc_driver); |
| 1887 | err_register_udc_driver: |
| 1888 | driver_unregister (&dummy_hcd_driver); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1889 | return retval; |
| 1890 | } |
| 1891 | module_init (init); |
| 1892 | |
| 1893 | static void __exit cleanup (void) |
| 1894 | { |
Alan Stern | d9b7625 | 2005-05-03 16:15:43 -0400 | [diff] [blame] | 1895 | platform_device_unregister (&the_udc_pdev); |
| 1896 | platform_device_unregister (&the_hcd_pdev); |
| 1897 | driver_unregister (&dummy_udc_driver); |
| 1898 | driver_unregister (&dummy_hcd_driver); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1899 | } |
| 1900 | module_exit (cleanup); |