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 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 37 | #include <linux/module.h> |
| 38 | #include <linux/kernel.h> |
| 39 | #include <linux/delay.h> |
| 40 | #include <linux/ioport.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 41 | #include <linux/slab.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 42 | #include <linux/errno.h> |
| 43 | #include <linux/init.h> |
| 44 | #include <linux/timer.h> |
| 45 | #include <linux/list.h> |
| 46 | #include <linux/interrupt.h> |
Russell King | d052d1b | 2005-10-29 19:07:23 +0100 | [diff] [blame] | 47 | #include <linux/platform_device.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 48 | #include <linux/usb.h> |
| 49 | #include <linux/usb_gadget.h> |
| 50 | |
| 51 | #include <asm/byteorder.h> |
| 52 | #include <asm/io.h> |
| 53 | #include <asm/irq.h> |
| 54 | #include <asm/system.h> |
| 55 | #include <asm/unaligned.h> |
| 56 | |
| 57 | |
| 58 | #include "../core/hcd.h" |
| 59 | |
| 60 | |
| 61 | #define DRIVER_DESC "USB Host+Gadget Emulator" |
Alan Stern | 391eca9 | 2005-05-10 15:34:16 -0400 | [diff] [blame] | 62 | #define DRIVER_VERSION "02 May 2005" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 63 | |
| 64 | static const char driver_name [] = "dummy_hcd"; |
| 65 | static const char driver_desc [] = "USB Host+Gadget Emulator"; |
| 66 | |
| 67 | static const char gadget_name [] = "dummy_udc"; |
| 68 | |
| 69 | MODULE_DESCRIPTION (DRIVER_DESC); |
| 70 | MODULE_AUTHOR ("David Brownell"); |
| 71 | MODULE_LICENSE ("GPL"); |
| 72 | |
| 73 | /*-------------------------------------------------------------------------*/ |
| 74 | |
| 75 | /* gadget side driver data structres */ |
| 76 | struct dummy_ep { |
| 77 | struct list_head queue; |
| 78 | unsigned long last_io; /* jiffies timestamp */ |
| 79 | struct usb_gadget *gadget; |
| 80 | const struct usb_endpoint_descriptor *desc; |
| 81 | struct usb_ep ep; |
| 82 | unsigned halted : 1; |
| 83 | unsigned already_seen : 1; |
| 84 | unsigned setup_stage : 1; |
| 85 | }; |
| 86 | |
| 87 | struct dummy_request { |
| 88 | struct list_head queue; /* ep's requests */ |
| 89 | struct usb_request req; |
| 90 | }; |
| 91 | |
| 92 | static inline struct dummy_ep *usb_ep_to_dummy_ep (struct usb_ep *_ep) |
| 93 | { |
| 94 | return container_of (_ep, struct dummy_ep, ep); |
| 95 | } |
| 96 | |
| 97 | static inline struct dummy_request *usb_request_to_dummy_request |
| 98 | (struct usb_request *_req) |
| 99 | { |
| 100 | return container_of (_req, struct dummy_request, req); |
| 101 | } |
| 102 | |
| 103 | /*-------------------------------------------------------------------------*/ |
| 104 | |
| 105 | /* |
| 106 | * Every device has ep0 for control requests, plus up to 30 more endpoints, |
| 107 | * in one of two types: |
| 108 | * |
| 109 | * - Configurable: direction (in/out), type (bulk, iso, etc), and endpoint |
| 110 | * number can be changed. Names like "ep-a" are used for this type. |
| 111 | * |
| 112 | * - Fixed Function: in other cases. some characteristics may be mutable; |
| 113 | * that'd be hardware-specific. Names like "ep12out-bulk" are used. |
| 114 | * |
| 115 | * Gadget drivers are responsible for not setting up conflicting endpoint |
| 116 | * configurations, illegal or unsupported packet lengths, and so on. |
| 117 | */ |
| 118 | |
| 119 | static const char ep0name [] = "ep0"; |
| 120 | |
| 121 | static const char *const ep_name [] = { |
| 122 | ep0name, /* everyone has ep0 */ |
| 123 | |
| 124 | /* act like a net2280: high speed, six configurable endpoints */ |
| 125 | "ep-a", "ep-b", "ep-c", "ep-d", "ep-e", "ep-f", |
| 126 | |
| 127 | /* or like pxa250: fifteen fixed function endpoints */ |
| 128 | "ep1in-bulk", "ep2out-bulk", "ep3in-iso", "ep4out-iso", "ep5in-int", |
| 129 | "ep6in-bulk", "ep7out-bulk", "ep8in-iso", "ep9out-iso", "ep10in-int", |
| 130 | "ep11in-bulk", "ep12out-bulk", "ep13in-iso", "ep14out-iso", |
| 131 | "ep15in-int", |
| 132 | |
| 133 | /* or like sa1100: two fixed function endpoints */ |
| 134 | "ep1out-bulk", "ep2in-bulk", |
| 135 | }; |
Tobias Klauser | 52950ed | 2005-12-11 16:20:08 +0100 | [diff] [blame] | 136 | #define DUMMY_ENDPOINTS ARRAY_SIZE(ep_name) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 137 | |
Alan Stern | d9b7625 | 2005-05-03 16:15:43 -0400 | [diff] [blame] | 138 | /*-------------------------------------------------------------------------*/ |
| 139 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 140 | #define FIFO_SIZE 64 |
| 141 | |
| 142 | struct urbp { |
| 143 | struct urb *urb; |
| 144 | struct list_head urbp_list; |
| 145 | }; |
| 146 | |
Alan Stern | 391eca9 | 2005-05-10 15:34:16 -0400 | [diff] [blame] | 147 | |
| 148 | enum dummy_rh_state { |
| 149 | DUMMY_RH_RESET, |
| 150 | DUMMY_RH_SUSPENDED, |
| 151 | DUMMY_RH_RUNNING |
| 152 | }; |
| 153 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 154 | struct dummy { |
| 155 | spinlock_t lock; |
| 156 | |
| 157 | /* |
| 158 | * SLAVE/GADGET side support |
| 159 | */ |
| 160 | struct dummy_ep ep [DUMMY_ENDPOINTS]; |
| 161 | int address; |
| 162 | struct usb_gadget gadget; |
| 163 | struct usb_gadget_driver *driver; |
| 164 | struct dummy_request fifo_req; |
| 165 | u8 fifo_buf [FIFO_SIZE]; |
| 166 | u16 devstatus; |
Alan Stern | 391eca9 | 2005-05-10 15:34:16 -0400 | [diff] [blame] | 167 | unsigned udc_suspended:1; |
Alan Stern | f1c39fa | 2005-05-03 16:24:04 -0400 | [diff] [blame] | 168 | unsigned pullup:1; |
| 169 | unsigned active:1; |
| 170 | unsigned old_active:1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 171 | |
| 172 | /* |
| 173 | * MASTER/HOST side support |
| 174 | */ |
Alan Stern | 391eca9 | 2005-05-10 15:34:16 -0400 | [diff] [blame] | 175 | enum dummy_rh_state rh_state; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 176 | struct timer_list timer; |
| 177 | u32 port_status; |
Alan Stern | f1c39fa | 2005-05-03 16:24:04 -0400 | [diff] [blame] | 178 | u32 old_status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 179 | unsigned resuming:1; |
| 180 | unsigned long re_timeout; |
| 181 | |
| 182 | struct usb_device *udev; |
| 183 | struct list_head urbp_list; |
| 184 | }; |
| 185 | |
| 186 | static inline struct dummy *hcd_to_dummy (struct usb_hcd *hcd) |
| 187 | { |
| 188 | return (struct dummy *) (hcd->hcd_priv); |
| 189 | } |
| 190 | |
| 191 | static inline struct usb_hcd *dummy_to_hcd (struct dummy *dum) |
| 192 | { |
| 193 | return container_of((void *) dum, struct usb_hcd, hcd_priv); |
| 194 | } |
| 195 | |
| 196 | static inline struct device *dummy_dev (struct dummy *dum) |
| 197 | { |
| 198 | return dummy_to_hcd(dum)->self.controller; |
| 199 | } |
| 200 | |
Alan Stern | d9b7625 | 2005-05-03 16:15:43 -0400 | [diff] [blame] | 201 | static inline struct device *udc_dev (struct dummy *dum) |
| 202 | { |
| 203 | return dum->gadget.dev.parent; |
| 204 | } |
| 205 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 206 | static inline struct dummy *ep_to_dummy (struct dummy_ep *ep) |
| 207 | { |
| 208 | return container_of (ep->gadget, struct dummy, gadget); |
| 209 | } |
| 210 | |
| 211 | static inline struct dummy *gadget_to_dummy (struct usb_gadget *gadget) |
| 212 | { |
| 213 | return container_of (gadget, struct dummy, gadget); |
| 214 | } |
| 215 | |
| 216 | static inline struct dummy *gadget_dev_to_dummy (struct device *dev) |
| 217 | { |
| 218 | return container_of (dev, struct dummy, gadget.dev); |
| 219 | } |
| 220 | |
| 221 | static struct dummy *the_controller; |
| 222 | |
| 223 | /*-------------------------------------------------------------------------*/ |
| 224 | |
Alan Stern | f1c39fa | 2005-05-03 16:24:04 -0400 | [diff] [blame] | 225 | /* SLAVE/GADGET SIDE UTILITY ROUTINES */ |
| 226 | |
| 227 | /* called with spinlock held */ |
| 228 | static void nuke (struct dummy *dum, struct dummy_ep *ep) |
| 229 | { |
| 230 | while (!list_empty (&ep->queue)) { |
| 231 | struct dummy_request *req; |
| 232 | |
| 233 | req = list_entry (ep->queue.next, struct dummy_request, queue); |
| 234 | list_del_init (&req->queue); |
| 235 | req->req.status = -ESHUTDOWN; |
| 236 | |
| 237 | spin_unlock (&dum->lock); |
| 238 | req->req.complete (&ep->ep, &req->req); |
| 239 | spin_lock (&dum->lock); |
| 240 | } |
| 241 | } |
| 242 | |
| 243 | /* caller must hold lock */ |
| 244 | static void |
| 245 | stop_activity (struct dummy *dum) |
| 246 | { |
| 247 | struct dummy_ep *ep; |
| 248 | |
| 249 | /* prevent any more requests */ |
| 250 | dum->address = 0; |
| 251 | |
| 252 | /* The timer is left running so that outstanding URBs can fail */ |
| 253 | |
| 254 | /* nuke any pending requests first, so driver i/o is quiesced */ |
| 255 | list_for_each_entry (ep, &dum->gadget.ep_list, ep.ep_list) |
| 256 | nuke (dum, ep); |
| 257 | |
| 258 | /* driver now does any non-usb quiescing necessary */ |
| 259 | } |
| 260 | |
| 261 | /* caller must hold lock */ |
| 262 | static void |
| 263 | set_link_state (struct dummy *dum) |
| 264 | { |
| 265 | dum->active = 0; |
| 266 | if ((dum->port_status & USB_PORT_STAT_POWER) == 0) |
| 267 | dum->port_status = 0; |
Alan Stern | 391eca9 | 2005-05-10 15:34:16 -0400 | [diff] [blame] | 268 | |
| 269 | /* UDC suspend must cause a disconnect */ |
| 270 | else if (!dum->pullup || dum->udc_suspended) { |
Alan Stern | f1c39fa | 2005-05-03 16:24:04 -0400 | [diff] [blame] | 271 | dum->port_status &= ~(USB_PORT_STAT_CONNECTION | |
| 272 | USB_PORT_STAT_ENABLE | |
| 273 | USB_PORT_STAT_LOW_SPEED | |
| 274 | USB_PORT_STAT_HIGH_SPEED | |
| 275 | USB_PORT_STAT_SUSPEND); |
| 276 | if ((dum->old_status & USB_PORT_STAT_CONNECTION) != 0) |
| 277 | dum->port_status |= (USB_PORT_STAT_C_CONNECTION << 16); |
| 278 | } else { |
| 279 | dum->port_status |= USB_PORT_STAT_CONNECTION; |
| 280 | if ((dum->old_status & USB_PORT_STAT_CONNECTION) == 0) |
| 281 | dum->port_status |= (USB_PORT_STAT_C_CONNECTION << 16); |
| 282 | if ((dum->port_status & USB_PORT_STAT_ENABLE) == 0) |
| 283 | dum->port_status &= ~USB_PORT_STAT_SUSPEND; |
Alan Stern | 391eca9 | 2005-05-10 15:34:16 -0400 | [diff] [blame] | 284 | else if ((dum->port_status & USB_PORT_STAT_SUSPEND) == 0 && |
| 285 | dum->rh_state != DUMMY_RH_SUSPENDED) |
Alan Stern | f1c39fa | 2005-05-03 16:24:04 -0400 | [diff] [blame] | 286 | dum->active = 1; |
| 287 | } |
| 288 | |
| 289 | if ((dum->port_status & USB_PORT_STAT_ENABLE) == 0 || dum->active) |
| 290 | dum->resuming = 0; |
| 291 | |
| 292 | if ((dum->port_status & USB_PORT_STAT_CONNECTION) == 0 || |
| 293 | (dum->port_status & USB_PORT_STAT_RESET) != 0) { |
| 294 | if ((dum->old_status & USB_PORT_STAT_CONNECTION) != 0 && |
| 295 | (dum->old_status & USB_PORT_STAT_RESET) == 0 && |
| 296 | dum->driver) { |
| 297 | stop_activity (dum); |
| 298 | spin_unlock (&dum->lock); |
| 299 | dum->driver->disconnect (&dum->gadget); |
| 300 | spin_lock (&dum->lock); |
| 301 | } |
| 302 | } else if (dum->active != dum->old_active) { |
| 303 | if (dum->old_active && dum->driver->suspend) { |
| 304 | spin_unlock (&dum->lock); |
| 305 | dum->driver->suspend (&dum->gadget); |
| 306 | spin_lock (&dum->lock); |
| 307 | } else if (!dum->old_active && dum->driver->resume) { |
| 308 | spin_unlock (&dum->lock); |
| 309 | dum->driver->resume (&dum->gadget); |
| 310 | spin_lock (&dum->lock); |
| 311 | } |
| 312 | } |
| 313 | |
| 314 | dum->old_status = dum->port_status; |
| 315 | dum->old_active = dum->active; |
| 316 | } |
| 317 | |
| 318 | /*-------------------------------------------------------------------------*/ |
| 319 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 320 | /* SLAVE/GADGET SIDE DRIVER |
| 321 | * |
| 322 | * This only tracks gadget state. All the work is done when the host |
| 323 | * side tries some (emulated) i/o operation. Real device controller |
| 324 | * drivers would do real i/o using dma, fifos, irqs, timers, etc. |
| 325 | */ |
| 326 | |
| 327 | #define is_enabled(dum) \ |
| 328 | (dum->port_status & USB_PORT_STAT_ENABLE) |
| 329 | |
| 330 | static int |
| 331 | dummy_enable (struct usb_ep *_ep, const struct usb_endpoint_descriptor *desc) |
| 332 | { |
| 333 | struct dummy *dum; |
| 334 | struct dummy_ep *ep; |
| 335 | unsigned max; |
| 336 | int retval; |
| 337 | |
| 338 | ep = usb_ep_to_dummy_ep (_ep); |
| 339 | if (!_ep || !desc || ep->desc || _ep->name == ep0name |
| 340 | || desc->bDescriptorType != USB_DT_ENDPOINT) |
| 341 | return -EINVAL; |
| 342 | dum = ep_to_dummy (ep); |
| 343 | if (!dum->driver || !is_enabled (dum)) |
| 344 | return -ESHUTDOWN; |
| 345 | max = le16_to_cpu(desc->wMaxPacketSize) & 0x3ff; |
| 346 | |
| 347 | /* drivers must not request bad settings, since lower levels |
| 348 | * (hardware or its drivers) may not check. some endpoints |
| 349 | * can't do iso, many have maxpacket limitations, etc. |
| 350 | * |
| 351 | * since this "hardware" driver is here to help debugging, we |
| 352 | * have some extra sanity checks. (there could be more though, |
| 353 | * especially for "ep9out" style fixed function ones.) |
| 354 | */ |
| 355 | retval = -EINVAL; |
| 356 | switch (desc->bmAttributes & 0x03) { |
| 357 | case USB_ENDPOINT_XFER_BULK: |
| 358 | if (strstr (ep->ep.name, "-iso") |
| 359 | || strstr (ep->ep.name, "-int")) { |
| 360 | goto done; |
| 361 | } |
| 362 | switch (dum->gadget.speed) { |
| 363 | case USB_SPEED_HIGH: |
| 364 | if (max == 512) |
| 365 | break; |
| 366 | /* conserve return statements */ |
| 367 | default: |
| 368 | switch (max) { |
| 369 | case 8: case 16: case 32: case 64: |
| 370 | /* we'll fake any legal size */ |
| 371 | break; |
| 372 | default: |
| 373 | case USB_SPEED_LOW: |
| 374 | goto done; |
| 375 | } |
| 376 | } |
| 377 | break; |
| 378 | case USB_ENDPOINT_XFER_INT: |
| 379 | if (strstr (ep->ep.name, "-iso")) /* bulk is ok */ |
| 380 | goto done; |
| 381 | /* real hardware might not handle all packet sizes */ |
| 382 | switch (dum->gadget.speed) { |
| 383 | case USB_SPEED_HIGH: |
| 384 | if (max <= 1024) |
| 385 | break; |
| 386 | /* save a return statement */ |
| 387 | case USB_SPEED_FULL: |
| 388 | if (max <= 64) |
| 389 | break; |
| 390 | /* save a return statement */ |
| 391 | default: |
| 392 | if (max <= 8) |
| 393 | break; |
| 394 | goto done; |
| 395 | } |
| 396 | break; |
| 397 | case USB_ENDPOINT_XFER_ISOC: |
| 398 | if (strstr (ep->ep.name, "-bulk") |
| 399 | || strstr (ep->ep.name, "-int")) |
| 400 | goto done; |
| 401 | /* real hardware might not handle all packet sizes */ |
| 402 | switch (dum->gadget.speed) { |
| 403 | case USB_SPEED_HIGH: |
| 404 | if (max <= 1024) |
| 405 | break; |
| 406 | /* save a return statement */ |
| 407 | case USB_SPEED_FULL: |
| 408 | if (max <= 1023) |
| 409 | break; |
| 410 | /* save a return statement */ |
| 411 | default: |
| 412 | goto done; |
| 413 | } |
| 414 | break; |
| 415 | default: |
| 416 | /* few chips support control except on ep0 */ |
| 417 | goto done; |
| 418 | } |
| 419 | |
| 420 | _ep->maxpacket = max; |
| 421 | ep->desc = desc; |
| 422 | |
Alan Stern | d9b7625 | 2005-05-03 16:15:43 -0400 | [diff] [blame] | 423 | 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] | 424 | _ep->name, |
| 425 | desc->bEndpointAddress & 0x0f, |
| 426 | (desc->bEndpointAddress & USB_DIR_IN) ? "in" : "out", |
| 427 | ({ char *val; |
| 428 | switch (desc->bmAttributes & 0x03) { |
| 429 | case USB_ENDPOINT_XFER_BULK: val = "bulk"; break; |
| 430 | case USB_ENDPOINT_XFER_ISOC: val = "iso"; break; |
| 431 | case USB_ENDPOINT_XFER_INT: val = "intr"; break; |
| 432 | default: val = "ctrl"; break; |
| 433 | }; val; }), |
| 434 | max); |
| 435 | |
| 436 | /* at this point real hardware should be NAKing transfers |
| 437 | * to that endpoint, until a buffer is queued to it. |
| 438 | */ |
| 439 | retval = 0; |
| 440 | done: |
| 441 | return retval; |
| 442 | } |
| 443 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 444 | static int dummy_disable (struct usb_ep *_ep) |
| 445 | { |
| 446 | struct dummy_ep *ep; |
| 447 | struct dummy *dum; |
| 448 | unsigned long flags; |
| 449 | int retval; |
| 450 | |
| 451 | ep = usb_ep_to_dummy_ep (_ep); |
| 452 | if (!_ep || !ep->desc || _ep->name == ep0name) |
| 453 | return -EINVAL; |
| 454 | dum = ep_to_dummy (ep); |
| 455 | |
| 456 | spin_lock_irqsave (&dum->lock, flags); |
| 457 | ep->desc = NULL; |
| 458 | retval = 0; |
| 459 | nuke (dum, ep); |
| 460 | spin_unlock_irqrestore (&dum->lock, flags); |
| 461 | |
Alan Stern | d9b7625 | 2005-05-03 16:15:43 -0400 | [diff] [blame] | 462 | dev_dbg (udc_dev(dum), "disabled %s\n", _ep->name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 463 | return retval; |
| 464 | } |
| 465 | |
| 466 | static struct usb_request * |
Al Viro | 55016f1 | 2005-10-21 03:21:58 -0400 | [diff] [blame] | 467 | dummy_alloc_request (struct usb_ep *_ep, gfp_t mem_flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 468 | { |
| 469 | struct dummy_ep *ep; |
| 470 | struct dummy_request *req; |
| 471 | |
| 472 | if (!_ep) |
| 473 | return NULL; |
| 474 | ep = usb_ep_to_dummy_ep (_ep); |
| 475 | |
Eric Sesterhenn | 7039f42 | 2006-02-27 13:34:10 -0800 | [diff] [blame] | 476 | req = kzalloc(sizeof(*req), mem_flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 477 | if (!req) |
| 478 | return NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 479 | INIT_LIST_HEAD (&req->queue); |
| 480 | return &req->req; |
| 481 | } |
| 482 | |
| 483 | static void |
| 484 | dummy_free_request (struct usb_ep *_ep, struct usb_request *_req) |
| 485 | { |
| 486 | struct dummy_ep *ep; |
| 487 | struct dummy_request *req; |
| 488 | |
| 489 | ep = usb_ep_to_dummy_ep (_ep); |
| 490 | if (!ep || !_req || (!ep->desc && _ep->name != ep0name)) |
| 491 | return; |
| 492 | |
| 493 | req = usb_request_to_dummy_request (_req); |
| 494 | WARN_ON (!list_empty (&req->queue)); |
| 495 | kfree (req); |
| 496 | } |
| 497 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 498 | static void |
| 499 | fifo_complete (struct usb_ep *ep, struct usb_request *req) |
| 500 | { |
| 501 | } |
| 502 | |
| 503 | static int |
Olav Kongas | 5db539e | 2005-06-23 20:25:36 +0300 | [diff] [blame] | 504 | dummy_queue (struct usb_ep *_ep, struct usb_request *_req, |
Al Viro | 55016f1 | 2005-10-21 03:21:58 -0400 | [diff] [blame] | 505 | gfp_t mem_flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 506 | { |
| 507 | struct dummy_ep *ep; |
| 508 | struct dummy_request *req; |
| 509 | struct dummy *dum; |
| 510 | unsigned long flags; |
| 511 | |
| 512 | req = usb_request_to_dummy_request (_req); |
| 513 | if (!_req || !list_empty (&req->queue) || !_req->complete) |
| 514 | return -EINVAL; |
| 515 | |
| 516 | ep = usb_ep_to_dummy_ep (_ep); |
| 517 | if (!_ep || (!ep->desc && _ep->name != ep0name)) |
| 518 | return -EINVAL; |
| 519 | |
| 520 | dum = ep_to_dummy (ep); |
| 521 | if (!dum->driver || !is_enabled (dum)) |
| 522 | return -ESHUTDOWN; |
| 523 | |
| 524 | #if 0 |
Alan Stern | d9b7625 | 2005-05-03 16:15:43 -0400 | [diff] [blame] | 525 | 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] | 526 | ep, _req, _ep->name, _req->length, _req->buf); |
| 527 | #endif |
| 528 | |
| 529 | _req->status = -EINPROGRESS; |
| 530 | _req->actual = 0; |
| 531 | spin_lock_irqsave (&dum->lock, flags); |
| 532 | |
| 533 | /* implement an emulated single-request FIFO */ |
| 534 | if (ep->desc && (ep->desc->bEndpointAddress & USB_DIR_IN) && |
| 535 | list_empty (&dum->fifo_req.queue) && |
| 536 | list_empty (&ep->queue) && |
| 537 | _req->length <= FIFO_SIZE) { |
| 538 | req = &dum->fifo_req; |
| 539 | req->req = *_req; |
| 540 | req->req.buf = dum->fifo_buf; |
| 541 | memcpy (dum->fifo_buf, _req->buf, _req->length); |
| 542 | req->req.context = dum; |
| 543 | req->req.complete = fifo_complete; |
| 544 | |
| 545 | spin_unlock (&dum->lock); |
| 546 | _req->actual = _req->length; |
| 547 | _req->status = 0; |
| 548 | _req->complete (_ep, _req); |
| 549 | spin_lock (&dum->lock); |
| 550 | } |
| 551 | list_add_tail (&req->queue, &ep->queue); |
| 552 | spin_unlock_irqrestore (&dum->lock, flags); |
| 553 | |
| 554 | /* real hardware would likely enable transfers here, in case |
| 555 | * it'd been left NAKing. |
| 556 | */ |
| 557 | return 0; |
| 558 | } |
| 559 | |
| 560 | static int dummy_dequeue (struct usb_ep *_ep, struct usb_request *_req) |
| 561 | { |
| 562 | struct dummy_ep *ep; |
| 563 | struct dummy *dum; |
| 564 | int retval = -EINVAL; |
| 565 | unsigned long flags; |
| 566 | struct dummy_request *req = NULL; |
| 567 | |
| 568 | if (!_ep || !_req) |
| 569 | return retval; |
| 570 | ep = usb_ep_to_dummy_ep (_ep); |
| 571 | dum = ep_to_dummy (ep); |
| 572 | |
| 573 | if (!dum->driver) |
| 574 | return -ESHUTDOWN; |
| 575 | |
Alan Stern | b4dbda1 | 2006-07-28 17:07:34 -0400 | [diff] [blame] | 576 | local_irq_save (flags); |
| 577 | spin_lock (&dum->lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 578 | list_for_each_entry (req, &ep->queue, queue) { |
| 579 | if (&req->req == _req) { |
| 580 | list_del_init (&req->queue); |
| 581 | _req->status = -ECONNRESET; |
| 582 | retval = 0; |
| 583 | break; |
| 584 | } |
| 585 | } |
Alan Stern | b4dbda1 | 2006-07-28 17:07:34 -0400 | [diff] [blame] | 586 | spin_unlock (&dum->lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 587 | |
| 588 | if (retval == 0) { |
Alan Stern | d9b7625 | 2005-05-03 16:15:43 -0400 | [diff] [blame] | 589 | dev_dbg (udc_dev(dum), |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 590 | "dequeued req %p from %s, len %d buf %p\n", |
| 591 | req, _ep->name, _req->length, _req->buf); |
| 592 | _req->complete (_ep, _req); |
| 593 | } |
Alan Stern | b4dbda1 | 2006-07-28 17:07:34 -0400 | [diff] [blame] | 594 | local_irq_restore (flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 595 | return retval; |
| 596 | } |
| 597 | |
| 598 | static int |
| 599 | dummy_set_halt (struct usb_ep *_ep, int value) |
| 600 | { |
| 601 | struct dummy_ep *ep; |
| 602 | struct dummy *dum; |
| 603 | |
| 604 | if (!_ep) |
| 605 | return -EINVAL; |
| 606 | ep = usb_ep_to_dummy_ep (_ep); |
| 607 | dum = ep_to_dummy (ep); |
| 608 | if (!dum->driver) |
| 609 | return -ESHUTDOWN; |
| 610 | if (!value) |
| 611 | ep->halted = 0; |
| 612 | else if (ep->desc && (ep->desc->bEndpointAddress & USB_DIR_IN) && |
| 613 | !list_empty (&ep->queue)) |
| 614 | return -EAGAIN; |
| 615 | else |
| 616 | ep->halted = 1; |
| 617 | /* FIXME clear emulated data toggle too */ |
| 618 | return 0; |
| 619 | } |
| 620 | |
| 621 | static const struct usb_ep_ops dummy_ep_ops = { |
| 622 | .enable = dummy_enable, |
| 623 | .disable = dummy_disable, |
| 624 | |
| 625 | .alloc_request = dummy_alloc_request, |
| 626 | .free_request = dummy_free_request, |
| 627 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 628 | .queue = dummy_queue, |
| 629 | .dequeue = dummy_dequeue, |
| 630 | |
| 631 | .set_halt = dummy_set_halt, |
| 632 | }; |
| 633 | |
| 634 | /*-------------------------------------------------------------------------*/ |
| 635 | |
| 636 | /* there are both host and device side versions of this call ... */ |
| 637 | static int dummy_g_get_frame (struct usb_gadget *_gadget) |
| 638 | { |
| 639 | struct timeval tv; |
| 640 | |
| 641 | do_gettimeofday (&tv); |
| 642 | return tv.tv_usec / 1000; |
| 643 | } |
| 644 | |
| 645 | static int dummy_wakeup (struct usb_gadget *_gadget) |
| 646 | { |
| 647 | struct dummy *dum; |
| 648 | |
| 649 | dum = gadget_to_dummy (_gadget); |
Alan Stern | 391eca9 | 2005-05-10 15:34:16 -0400 | [diff] [blame] | 650 | if (!(dum->devstatus & ( (1 << USB_DEVICE_B_HNP_ENABLE) |
Alan Stern | 5742b0c | 2005-05-02 11:25:17 -0400 | [diff] [blame] | 651 | | (1 << USB_DEVICE_REMOTE_WAKEUP)))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 652 | return -EINVAL; |
Alan Stern | 391eca9 | 2005-05-10 15:34:16 -0400 | [diff] [blame] | 653 | if ((dum->port_status & USB_PORT_STAT_CONNECTION) == 0) |
| 654 | return -ENOLINK; |
| 655 | if ((dum->port_status & USB_PORT_STAT_SUSPEND) == 0 && |
| 656 | dum->rh_state != DUMMY_RH_SUSPENDED) |
| 657 | return -EIO; |
| 658 | |
| 659 | /* FIXME: What if the root hub is suspended but the port isn't? */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 660 | |
| 661 | /* hub notices our request, issues downstream resume, etc */ |
| 662 | dum->resuming = 1; |
Alan Stern | f1c39fa | 2005-05-03 16:24:04 -0400 | [diff] [blame] | 663 | dum->re_timeout = jiffies + msecs_to_jiffies(20); |
Alan Stern | 685eb93 | 2005-05-03 16:27:26 -0400 | [diff] [blame] | 664 | mod_timer (&dummy_to_hcd (dum)->rh_timer, dum->re_timeout); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 665 | return 0; |
| 666 | } |
| 667 | |
| 668 | static int dummy_set_selfpowered (struct usb_gadget *_gadget, int value) |
| 669 | { |
| 670 | struct dummy *dum; |
| 671 | |
| 672 | dum = gadget_to_dummy (_gadget); |
| 673 | if (value) |
| 674 | dum->devstatus |= (1 << USB_DEVICE_SELF_POWERED); |
| 675 | else |
| 676 | dum->devstatus &= ~(1 << USB_DEVICE_SELF_POWERED); |
| 677 | return 0; |
| 678 | } |
| 679 | |
Alan Stern | f1c39fa | 2005-05-03 16:24:04 -0400 | [diff] [blame] | 680 | static int dummy_pullup (struct usb_gadget *_gadget, int value) |
| 681 | { |
| 682 | struct dummy *dum; |
| 683 | unsigned long flags; |
| 684 | |
| 685 | dum = gadget_to_dummy (_gadget); |
| 686 | spin_lock_irqsave (&dum->lock, flags); |
| 687 | dum->pullup = (value != 0); |
| 688 | set_link_state (dum); |
| 689 | spin_unlock_irqrestore (&dum->lock, flags); |
Alan Stern | 685eb93 | 2005-05-03 16:27:26 -0400 | [diff] [blame] | 690 | |
| 691 | usb_hcd_poll_rh_status (dummy_to_hcd (dum)); |
Alan Stern | f1c39fa | 2005-05-03 16:24:04 -0400 | [diff] [blame] | 692 | return 0; |
| 693 | } |
| 694 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 695 | static const struct usb_gadget_ops dummy_ops = { |
| 696 | .get_frame = dummy_g_get_frame, |
| 697 | .wakeup = dummy_wakeup, |
| 698 | .set_selfpowered = dummy_set_selfpowered, |
Alan Stern | f1c39fa | 2005-05-03 16:24:04 -0400 | [diff] [blame] | 699 | .pullup = dummy_pullup, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 700 | }; |
| 701 | |
| 702 | /*-------------------------------------------------------------------------*/ |
| 703 | |
| 704 | /* "function" sysfs attribute */ |
| 705 | static ssize_t |
Yani Ioannou | 10523b3 | 2005-05-17 06:43:37 -0400 | [diff] [blame] | 706 | show_function (struct device *dev, struct device_attribute *attr, char *buf) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 707 | { |
| 708 | struct dummy *dum = gadget_dev_to_dummy (dev); |
| 709 | |
| 710 | if (!dum->driver || !dum->driver->function) |
| 711 | return 0; |
| 712 | return scnprintf (buf, PAGE_SIZE, "%s\n", dum->driver->function); |
| 713 | } |
Alan Stern | cc095b0 | 2005-05-10 15:28:38 -0400 | [diff] [blame] | 714 | static DEVICE_ATTR (function, S_IRUGO, show_function, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 715 | |
| 716 | /*-------------------------------------------------------------------------*/ |
| 717 | |
| 718 | /* |
| 719 | * Driver registration/unregistration. |
| 720 | * |
| 721 | * This is basically hardware-specific; there's usually only one real USB |
| 722 | * device (not host) controller since that's how USB devices are intended |
| 723 | * to work. So most implementations of these api calls will rely on the |
| 724 | * fact that only one driver will ever bind to the hardware. But curious |
| 725 | * hardware can be built with discrete components, so the gadget API doesn't |
| 726 | * require that assumption. |
| 727 | * |
| 728 | * For this emulator, it might be convenient to create a usb slave device |
| 729 | * for each driver that registers: just add to a big root hub. |
| 730 | */ |
| 731 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 732 | int |
| 733 | usb_gadget_register_driver (struct usb_gadget_driver *driver) |
| 734 | { |
| 735 | struct dummy *dum = the_controller; |
| 736 | int retval, i; |
| 737 | |
| 738 | if (!dum) |
| 739 | return -EINVAL; |
| 740 | if (dum->driver) |
| 741 | return -EBUSY; |
David Brownell | 6bea476 | 2006-12-05 03:15:33 -0800 | [diff] [blame] | 742 | if (!driver->bind || !driver->setup |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 743 | || driver->speed == USB_SPEED_UNKNOWN) |
| 744 | return -EINVAL; |
| 745 | |
| 746 | /* |
| 747 | * SLAVE side init ... the layer above hardware, which |
| 748 | * can't enumerate without help from the driver we're binding. |
| 749 | */ |
Alan Stern | 5742b0c | 2005-05-02 11:25:17 -0400 | [diff] [blame] | 750 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 751 | dum->devstatus = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 752 | |
| 753 | INIT_LIST_HEAD (&dum->gadget.ep_list); |
| 754 | for (i = 0; i < DUMMY_ENDPOINTS; i++) { |
| 755 | struct dummy_ep *ep = &dum->ep [i]; |
| 756 | |
| 757 | if (!ep_name [i]) |
| 758 | break; |
| 759 | ep->ep.name = ep_name [i]; |
| 760 | ep->ep.ops = &dummy_ep_ops; |
| 761 | list_add_tail (&ep->ep.ep_list, &dum->gadget.ep_list); |
| 762 | ep->halted = ep->already_seen = ep->setup_stage = 0; |
| 763 | ep->ep.maxpacket = ~0; |
| 764 | ep->last_io = jiffies; |
| 765 | ep->gadget = &dum->gadget; |
| 766 | ep->desc = NULL; |
| 767 | INIT_LIST_HEAD (&ep->queue); |
| 768 | } |
| 769 | |
| 770 | dum->gadget.ep0 = &dum->ep [0].ep; |
| 771 | dum->ep [0].ep.maxpacket = 64; |
| 772 | list_del_init (&dum->ep [0].ep.ep_list); |
| 773 | INIT_LIST_HEAD(&dum->fifo_req.queue); |
| 774 | |
| 775 | dum->driver = driver; |
| 776 | dum->gadget.dev.driver = &driver->driver; |
Alan Stern | d9b7625 | 2005-05-03 16:15:43 -0400 | [diff] [blame] | 777 | dev_dbg (udc_dev(dum), "binding gadget driver '%s'\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 778 | driver->driver.name); |
Alan Stern | efd54a3 | 2006-09-25 11:55:56 -0400 | [diff] [blame] | 779 | if ((retval = driver->bind (&dum->gadget)) != 0) |
| 780 | goto err_bind_gadget; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 781 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 782 | driver->driver.bus = dum->gadget.dev.parent->bus; |
Alan Stern | efd54a3 | 2006-09-25 11:55:56 -0400 | [diff] [blame] | 783 | if ((retval = driver_register (&driver->driver)) != 0) |
| 784 | goto err_register; |
| 785 | if ((retval = device_bind_driver (&dum->gadget.dev)) != 0) |
| 786 | goto err_bind_driver; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 787 | |
| 788 | /* khubd will enumerate this in a while */ |
Alan Stern | f1c39fa | 2005-05-03 16:24:04 -0400 | [diff] [blame] | 789 | spin_lock_irq (&dum->lock); |
| 790 | dum->pullup = 1; |
| 791 | set_link_state (dum); |
| 792 | spin_unlock_irq (&dum->lock); |
Alan Stern | 685eb93 | 2005-05-03 16:27:26 -0400 | [diff] [blame] | 793 | |
| 794 | usb_hcd_poll_rh_status (dummy_to_hcd (dum)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 795 | return 0; |
Alan Stern | efd54a3 | 2006-09-25 11:55:56 -0400 | [diff] [blame] | 796 | |
| 797 | err_bind_driver: |
| 798 | driver_unregister (&driver->driver); |
| 799 | err_register: |
David Brownell | 6bea476 | 2006-12-05 03:15:33 -0800 | [diff] [blame] | 800 | if (driver->unbind) |
| 801 | driver->unbind (&dum->gadget); |
Alan Stern | efd54a3 | 2006-09-25 11:55:56 -0400 | [diff] [blame] | 802 | spin_lock_irq (&dum->lock); |
| 803 | dum->pullup = 0; |
| 804 | set_link_state (dum); |
| 805 | spin_unlock_irq (&dum->lock); |
| 806 | err_bind_gadget: |
| 807 | dum->driver = NULL; |
| 808 | dum->gadget.dev.driver = NULL; |
| 809 | return retval; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 810 | } |
| 811 | EXPORT_SYMBOL (usb_gadget_register_driver); |
| 812 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 813 | int |
| 814 | usb_gadget_unregister_driver (struct usb_gadget_driver *driver) |
| 815 | { |
| 816 | struct dummy *dum = the_controller; |
| 817 | unsigned long flags; |
| 818 | |
| 819 | if (!dum) |
| 820 | return -ENODEV; |
David Brownell | 6bea476 | 2006-12-05 03:15:33 -0800 | [diff] [blame] | 821 | if (!driver || driver != dum->driver || !driver->unbind) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 822 | return -EINVAL; |
| 823 | |
Alan Stern | d9b7625 | 2005-05-03 16:15:43 -0400 | [diff] [blame] | 824 | dev_dbg (udc_dev(dum), "unregister gadget driver '%s'\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 825 | driver->driver.name); |
| 826 | |
| 827 | spin_lock_irqsave (&dum->lock, flags); |
Alan Stern | f1c39fa | 2005-05-03 16:24:04 -0400 | [diff] [blame] | 828 | dum->pullup = 0; |
| 829 | set_link_state (dum); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 830 | spin_unlock_irqrestore (&dum->lock, flags); |
| 831 | |
| 832 | driver->unbind (&dum->gadget); |
| 833 | dum->driver = NULL; |
| 834 | |
| 835 | device_release_driver (&dum->gadget.dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 836 | driver_unregister (&driver->driver); |
| 837 | |
Alan Stern | f1c39fa | 2005-05-03 16:24:04 -0400 | [diff] [blame] | 838 | spin_lock_irqsave (&dum->lock, flags); |
| 839 | dum->pullup = 0; |
| 840 | set_link_state (dum); |
| 841 | spin_unlock_irqrestore (&dum->lock, flags); |
| 842 | |
Alan Stern | 685eb93 | 2005-05-03 16:27:26 -0400 | [diff] [blame] | 843 | usb_hcd_poll_rh_status (dummy_to_hcd (dum)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 844 | return 0; |
| 845 | } |
| 846 | EXPORT_SYMBOL (usb_gadget_unregister_driver); |
| 847 | |
| 848 | #undef is_enabled |
| 849 | |
Alan Stern | cc095b0 | 2005-05-10 15:28:38 -0400 | [diff] [blame] | 850 | /* just declare this in any driver that really need it */ |
| 851 | extern int net2280_set_fifo_mode (struct usb_gadget *gadget, int mode); |
| 852 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 853 | int net2280_set_fifo_mode (struct usb_gadget *gadget, int mode) |
| 854 | { |
| 855 | return -ENOSYS; |
| 856 | } |
| 857 | EXPORT_SYMBOL (net2280_set_fifo_mode); |
| 858 | |
Alan Stern | d9b7625 | 2005-05-03 16:15:43 -0400 | [diff] [blame] | 859 | |
| 860 | /* The gadget structure is stored inside the hcd structure and will be |
| 861 | * released along with it. */ |
| 862 | static void |
| 863 | dummy_gadget_release (struct device *dev) |
| 864 | { |
Alan Stern | d9b7625 | 2005-05-03 16:15:43 -0400 | [diff] [blame] | 865 | struct dummy *dum = gadget_dev_to_dummy (dev); |
| 866 | |
Alan Stern | 1720058 | 2006-08-30 11:32:52 -0400 | [diff] [blame] | 867 | usb_put_hcd (dummy_to_hcd (dum)); |
Alan Stern | d9b7625 | 2005-05-03 16:15:43 -0400 | [diff] [blame] | 868 | } |
| 869 | |
Alan Stern | 8364d6b | 2005-11-14 12:16:30 -0500 | [diff] [blame] | 870 | static int dummy_udc_probe (struct platform_device *pdev) |
Alan Stern | d9b7625 | 2005-05-03 16:15:43 -0400 | [diff] [blame] | 871 | { |
| 872 | struct dummy *dum = the_controller; |
| 873 | int rc; |
| 874 | |
| 875 | dum->gadget.name = gadget_name; |
| 876 | dum->gadget.ops = &dummy_ops; |
| 877 | dum->gadget.is_dualspeed = 1; |
| 878 | |
| 879 | /* maybe claim OTG support, though we won't complete HNP */ |
| 880 | dum->gadget.is_otg = (dummy_to_hcd(dum)->self.otg_port != 0); |
| 881 | |
| 882 | strcpy (dum->gadget.dev.bus_id, "gadget"); |
Alan Stern | 8364d6b | 2005-11-14 12:16:30 -0500 | [diff] [blame] | 883 | dum->gadget.dev.parent = &pdev->dev; |
Alan Stern | d9b7625 | 2005-05-03 16:15:43 -0400 | [diff] [blame] | 884 | dum->gadget.dev.release = dummy_gadget_release; |
| 885 | rc = device_register (&dum->gadget.dev); |
| 886 | if (rc < 0) |
| 887 | return rc; |
| 888 | |
Alan Stern | 1720058 | 2006-08-30 11:32:52 -0400 | [diff] [blame] | 889 | usb_get_hcd (dummy_to_hcd (dum)); |
Alan Stern | d9b7625 | 2005-05-03 16:15:43 -0400 | [diff] [blame] | 890 | |
Alan Stern | 8364d6b | 2005-11-14 12:16:30 -0500 | [diff] [blame] | 891 | platform_set_drvdata (pdev, dum); |
Alan Stern | efd54a3 | 2006-09-25 11:55:56 -0400 | [diff] [blame] | 892 | rc = device_create_file (&dum->gadget.dev, &dev_attr_function); |
| 893 | if (rc < 0) |
| 894 | device_unregister (&dum->gadget.dev); |
Alan Stern | d9b7625 | 2005-05-03 16:15:43 -0400 | [diff] [blame] | 895 | return rc; |
| 896 | } |
| 897 | |
Alan Stern | 8364d6b | 2005-11-14 12:16:30 -0500 | [diff] [blame] | 898 | static int dummy_udc_remove (struct platform_device *pdev) |
Alan Stern | d9b7625 | 2005-05-03 16:15:43 -0400 | [diff] [blame] | 899 | { |
Alan Stern | 8364d6b | 2005-11-14 12:16:30 -0500 | [diff] [blame] | 900 | struct dummy *dum = platform_get_drvdata (pdev); |
Alan Stern | d9b7625 | 2005-05-03 16:15:43 -0400 | [diff] [blame] | 901 | |
Alan Stern | 8364d6b | 2005-11-14 12:16:30 -0500 | [diff] [blame] | 902 | platform_set_drvdata (pdev, NULL); |
Alan Stern | d9b7625 | 2005-05-03 16:15:43 -0400 | [diff] [blame] | 903 | device_remove_file (&dum->gadget.dev, &dev_attr_function); |
| 904 | device_unregister (&dum->gadget.dev); |
| 905 | return 0; |
| 906 | } |
| 907 | |
Alan Stern | 8364d6b | 2005-11-14 12:16:30 -0500 | [diff] [blame] | 908 | static int dummy_udc_suspend (struct platform_device *pdev, pm_message_t state) |
Alan Stern | 391eca9 | 2005-05-10 15:34:16 -0400 | [diff] [blame] | 909 | { |
Alan Stern | 8364d6b | 2005-11-14 12:16:30 -0500 | [diff] [blame] | 910 | struct dummy *dum = platform_get_drvdata(pdev); |
Alan Stern | 391eca9 | 2005-05-10 15:34:16 -0400 | [diff] [blame] | 911 | |
Alan Stern | 8364d6b | 2005-11-14 12:16:30 -0500 | [diff] [blame] | 912 | dev_dbg (&pdev->dev, "%s\n", __FUNCTION__); |
Alan Stern | 391eca9 | 2005-05-10 15:34:16 -0400 | [diff] [blame] | 913 | spin_lock_irq (&dum->lock); |
| 914 | dum->udc_suspended = 1; |
| 915 | set_link_state (dum); |
| 916 | spin_unlock_irq (&dum->lock); |
| 917 | |
Alan Stern | 8364d6b | 2005-11-14 12:16:30 -0500 | [diff] [blame] | 918 | pdev->dev.power.power_state = state; |
Alan Stern | 391eca9 | 2005-05-10 15:34:16 -0400 | [diff] [blame] | 919 | usb_hcd_poll_rh_status (dummy_to_hcd (dum)); |
| 920 | return 0; |
| 921 | } |
| 922 | |
Alan Stern | 8364d6b | 2005-11-14 12:16:30 -0500 | [diff] [blame] | 923 | static int dummy_udc_resume (struct platform_device *pdev) |
Alan Stern | 391eca9 | 2005-05-10 15:34:16 -0400 | [diff] [blame] | 924 | { |
Alan Stern | 8364d6b | 2005-11-14 12:16:30 -0500 | [diff] [blame] | 925 | struct dummy *dum = platform_get_drvdata(pdev); |
Alan Stern | 391eca9 | 2005-05-10 15:34:16 -0400 | [diff] [blame] | 926 | |
Alan Stern | 8364d6b | 2005-11-14 12:16:30 -0500 | [diff] [blame] | 927 | dev_dbg (&pdev->dev, "%s\n", __FUNCTION__); |
Alan Stern | 391eca9 | 2005-05-10 15:34:16 -0400 | [diff] [blame] | 928 | spin_lock_irq (&dum->lock); |
| 929 | dum->udc_suspended = 0; |
| 930 | set_link_state (dum); |
| 931 | spin_unlock_irq (&dum->lock); |
| 932 | |
Alan Stern | 8364d6b | 2005-11-14 12:16:30 -0500 | [diff] [blame] | 933 | pdev->dev.power.power_state = PMSG_ON; |
Alan Stern | 391eca9 | 2005-05-10 15:34:16 -0400 | [diff] [blame] | 934 | usb_hcd_poll_rh_status (dummy_to_hcd (dum)); |
| 935 | return 0; |
| 936 | } |
| 937 | |
Russell King | 3ae5eae | 2005-11-09 22:32:44 +0000 | [diff] [blame] | 938 | static struct platform_driver dummy_udc_driver = { |
Alan Stern | d9b7625 | 2005-05-03 16:15:43 -0400 | [diff] [blame] | 939 | .probe = dummy_udc_probe, |
| 940 | .remove = dummy_udc_remove, |
Alan Stern | 391eca9 | 2005-05-10 15:34:16 -0400 | [diff] [blame] | 941 | .suspend = dummy_udc_suspend, |
| 942 | .resume = dummy_udc_resume, |
Russell King | 3ae5eae | 2005-11-09 22:32:44 +0000 | [diff] [blame] | 943 | .driver = { |
| 944 | .name = (char *) gadget_name, |
| 945 | .owner = THIS_MODULE, |
| 946 | }, |
Alan Stern | d9b7625 | 2005-05-03 16:15:43 -0400 | [diff] [blame] | 947 | }; |
| 948 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 949 | /*-------------------------------------------------------------------------*/ |
| 950 | |
| 951 | /* MASTER/HOST SIDE DRIVER |
| 952 | * |
| 953 | * this uses the hcd framework to hook up to host side drivers. |
| 954 | * its root hub will only have one device, otherwise it acts like |
| 955 | * a normal host controller. |
| 956 | * |
| 957 | * when urbs are queued, they're just stuck on a list that we |
| 958 | * scan in a timer callback. that callback connects writes from |
| 959 | * the host with reads from the device, and so on, based on the |
| 960 | * usb 2.0 rules. |
| 961 | */ |
| 962 | |
| 963 | static int dummy_urb_enqueue ( |
| 964 | struct usb_hcd *hcd, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 965 | struct urb *urb, |
Al Viro | 55016f1 | 2005-10-21 03:21:58 -0400 | [diff] [blame] | 966 | gfp_t mem_flags |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 967 | ) { |
| 968 | struct dummy *dum; |
| 969 | struct urbp *urbp; |
| 970 | unsigned long flags; |
Alan Stern | e9df41c | 2007-08-08 11:48:02 -0400 | [diff] [blame^] | 971 | int rc; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 972 | |
| 973 | if (!urb->transfer_buffer && urb->transfer_buffer_length) |
| 974 | return -EINVAL; |
| 975 | |
| 976 | urbp = kmalloc (sizeof *urbp, mem_flags); |
| 977 | if (!urbp) |
| 978 | return -ENOMEM; |
| 979 | urbp->urb = urb; |
| 980 | |
| 981 | dum = hcd_to_dummy (hcd); |
| 982 | spin_lock_irqsave (&dum->lock, flags); |
Alan Stern | e9df41c | 2007-08-08 11:48:02 -0400 | [diff] [blame^] | 983 | rc = usb_hcd_link_urb_to_ep(hcd, urb); |
| 984 | if (rc) { |
| 985 | kfree(urbp); |
| 986 | goto done; |
| 987 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 988 | |
| 989 | if (!dum->udev) { |
| 990 | dum->udev = urb->dev; |
| 991 | usb_get_dev (dum->udev); |
| 992 | } else if (unlikely (dum->udev != urb->dev)) |
| 993 | dev_err (dummy_dev(dum), "usb_device address has changed!\n"); |
| 994 | |
| 995 | list_add_tail (&urbp->urbp_list, &dum->urbp_list); |
| 996 | urb->hcpriv = urbp; |
| 997 | if (usb_pipetype (urb->pipe) == PIPE_CONTROL) |
| 998 | urb->error_count = 1; /* mark as a new urb */ |
| 999 | |
| 1000 | /* kick the scheduler, it'll do the rest */ |
| 1001 | if (!timer_pending (&dum->timer)) |
| 1002 | mod_timer (&dum->timer, jiffies + 1); |
| 1003 | |
| 1004 | spin_unlock_irqrestore (&dum->lock, flags); |
Alan Stern | e9df41c | 2007-08-08 11:48:02 -0400 | [diff] [blame^] | 1005 | done: |
| 1006 | return rc; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1007 | } |
| 1008 | |
Alan Stern | e9df41c | 2007-08-08 11:48:02 -0400 | [diff] [blame^] | 1009 | static int dummy_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1010 | { |
Alan Stern | 391eca9 | 2005-05-10 15:34:16 -0400 | [diff] [blame] | 1011 | struct dummy *dum; |
| 1012 | unsigned long flags; |
Alan Stern | e9df41c | 2007-08-08 11:48:02 -0400 | [diff] [blame^] | 1013 | int rc; |
Alan Stern | 391eca9 | 2005-05-10 15:34:16 -0400 | [diff] [blame] | 1014 | |
| 1015 | /* giveback happens automatically in timer callback, |
| 1016 | * so make sure the callback happens */ |
| 1017 | dum = hcd_to_dummy (hcd); |
| 1018 | spin_lock_irqsave (&dum->lock, flags); |
Alan Stern | e9df41c | 2007-08-08 11:48:02 -0400 | [diff] [blame^] | 1019 | |
| 1020 | rc = usb_hcd_check_unlink_urb(hcd, urb, status); |
| 1021 | if (!rc && dum->rh_state != DUMMY_RH_RUNNING && |
| 1022 | !list_empty(&dum->urbp_list)) |
Alan Stern | 391eca9 | 2005-05-10 15:34:16 -0400 | [diff] [blame] | 1023 | mod_timer (&dum->timer, jiffies); |
Alan Stern | e9df41c | 2007-08-08 11:48:02 -0400 | [diff] [blame^] | 1024 | |
Alan Stern | 391eca9 | 2005-05-10 15:34:16 -0400 | [diff] [blame] | 1025 | spin_unlock_irqrestore (&dum->lock, flags); |
Alan Stern | e9df41c | 2007-08-08 11:48:02 -0400 | [diff] [blame^] | 1026 | return rc; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1027 | } |
| 1028 | |
| 1029 | static void maybe_set_status (struct urb *urb, int status) |
| 1030 | { |
| 1031 | spin_lock (&urb->lock); |
| 1032 | if (urb->status == -EINPROGRESS) |
| 1033 | urb->status = status; |
| 1034 | spin_unlock (&urb->lock); |
| 1035 | } |
| 1036 | |
| 1037 | /* transfer up to a frame's worth; caller must own lock */ |
| 1038 | static int |
| 1039 | transfer (struct dummy *dum, struct urb *urb, struct dummy_ep *ep, int limit) |
| 1040 | { |
| 1041 | struct dummy_request *req; |
| 1042 | |
| 1043 | top: |
| 1044 | /* if there's no request queued, the device is NAKing; return */ |
| 1045 | list_for_each_entry (req, &ep->queue, queue) { |
| 1046 | unsigned host_len, dev_len, len; |
| 1047 | int is_short, to_host; |
| 1048 | int rescan = 0; |
| 1049 | |
| 1050 | /* 1..N packets of ep->ep.maxpacket each ... the last one |
| 1051 | * may be short (including zero length). |
| 1052 | * |
| 1053 | * writer can send a zlp explicitly (length 0) or implicitly |
| 1054 | * (length mod maxpacket zero, and 'zero' flag); they always |
| 1055 | * terminate reads. |
| 1056 | */ |
| 1057 | host_len = urb->transfer_buffer_length - urb->actual_length; |
| 1058 | dev_len = req->req.length - req->req.actual; |
| 1059 | len = min (host_len, dev_len); |
| 1060 | |
| 1061 | /* FIXME update emulated data toggle too */ |
| 1062 | |
| 1063 | to_host = usb_pipein (urb->pipe); |
| 1064 | if (unlikely (len == 0)) |
| 1065 | is_short = 1; |
| 1066 | else { |
| 1067 | char *ubuf, *rbuf; |
| 1068 | |
| 1069 | /* not enough bandwidth left? */ |
| 1070 | if (limit < ep->ep.maxpacket && limit < len) |
| 1071 | break; |
| 1072 | len = min (len, (unsigned) limit); |
| 1073 | if (len == 0) |
| 1074 | break; |
| 1075 | |
| 1076 | /* use an extra pass for the final short packet */ |
| 1077 | if (len > ep->ep.maxpacket) { |
| 1078 | rescan = 1; |
| 1079 | len -= (len % ep->ep.maxpacket); |
| 1080 | } |
| 1081 | is_short = (len % ep->ep.maxpacket) != 0; |
| 1082 | |
| 1083 | /* else transfer packet(s) */ |
| 1084 | ubuf = urb->transfer_buffer + urb->actual_length; |
| 1085 | rbuf = req->req.buf + req->req.actual; |
| 1086 | if (to_host) |
| 1087 | memcpy (ubuf, rbuf, len); |
| 1088 | else |
| 1089 | memcpy (rbuf, ubuf, len); |
| 1090 | ep->last_io = jiffies; |
| 1091 | |
| 1092 | limit -= len; |
| 1093 | urb->actual_length += len; |
| 1094 | req->req.actual += len; |
| 1095 | } |
| 1096 | |
| 1097 | /* short packets terminate, maybe with overflow/underflow. |
| 1098 | * it's only really an error to write too much. |
| 1099 | * |
| 1100 | * partially filling a buffer optionally blocks queue advances |
| 1101 | * (so completion handlers can clean up the queue) but we don't |
| 1102 | * need to emulate such data-in-flight. so we only show part |
| 1103 | * of the URB_SHORT_NOT_OK effect: completion status. |
| 1104 | */ |
| 1105 | if (is_short) { |
| 1106 | if (host_len == dev_len) { |
| 1107 | req->req.status = 0; |
| 1108 | maybe_set_status (urb, 0); |
| 1109 | } else if (to_host) { |
| 1110 | req->req.status = 0; |
| 1111 | if (dev_len > host_len) |
| 1112 | maybe_set_status (urb, -EOVERFLOW); |
| 1113 | else |
| 1114 | maybe_set_status (urb, |
| 1115 | (urb->transfer_flags |
| 1116 | & URB_SHORT_NOT_OK) |
| 1117 | ? -EREMOTEIO : 0); |
| 1118 | } else if (!to_host) { |
| 1119 | maybe_set_status (urb, 0); |
| 1120 | if (host_len > dev_len) |
| 1121 | req->req.status = -EOVERFLOW; |
| 1122 | else |
| 1123 | req->req.status = 0; |
| 1124 | } |
| 1125 | |
| 1126 | /* many requests terminate without a short packet */ |
| 1127 | } else { |
| 1128 | if (req->req.length == req->req.actual |
| 1129 | && !req->req.zero) |
| 1130 | req->req.status = 0; |
| 1131 | if (urb->transfer_buffer_length == urb->actual_length |
| 1132 | && !(urb->transfer_flags |
| 1133 | & URB_ZERO_PACKET)) { |
| 1134 | maybe_set_status (urb, 0); |
| 1135 | } |
| 1136 | } |
| 1137 | |
| 1138 | /* device side completion --> continuable */ |
| 1139 | if (req->req.status != -EINPROGRESS) { |
| 1140 | list_del_init (&req->queue); |
| 1141 | |
| 1142 | spin_unlock (&dum->lock); |
| 1143 | req->req.complete (&ep->ep, &req->req); |
| 1144 | spin_lock (&dum->lock); |
| 1145 | |
| 1146 | /* requests might have been unlinked... */ |
| 1147 | rescan = 1; |
| 1148 | } |
| 1149 | |
| 1150 | /* host side completion --> terminate */ |
| 1151 | if (urb->status != -EINPROGRESS) |
| 1152 | break; |
| 1153 | |
| 1154 | /* rescan to continue with any other queued i/o */ |
| 1155 | if (rescan) |
| 1156 | goto top; |
| 1157 | } |
| 1158 | return limit; |
| 1159 | } |
| 1160 | |
| 1161 | static int periodic_bytes (struct dummy *dum, struct dummy_ep *ep) |
| 1162 | { |
| 1163 | int limit = ep->ep.maxpacket; |
| 1164 | |
| 1165 | if (dum->gadget.speed == USB_SPEED_HIGH) { |
| 1166 | int tmp; |
| 1167 | |
| 1168 | /* high bandwidth mode */ |
| 1169 | tmp = le16_to_cpu(ep->desc->wMaxPacketSize); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1170 | tmp = (tmp >> 11) & 0x03; |
| 1171 | tmp *= 8 /* applies to entire frame */; |
| 1172 | limit += limit * tmp; |
| 1173 | } |
| 1174 | return limit; |
| 1175 | } |
| 1176 | |
| 1177 | #define is_active(dum) ((dum->port_status & \ |
| 1178 | (USB_PORT_STAT_CONNECTION | USB_PORT_STAT_ENABLE | \ |
| 1179 | USB_PORT_STAT_SUSPEND)) \ |
| 1180 | == (USB_PORT_STAT_CONNECTION | USB_PORT_STAT_ENABLE)) |
| 1181 | |
| 1182 | static struct dummy_ep *find_endpoint (struct dummy *dum, u8 address) |
| 1183 | { |
| 1184 | int i; |
| 1185 | |
| 1186 | if (!is_active (dum)) |
| 1187 | return NULL; |
| 1188 | if ((address & ~USB_DIR_IN) == 0) |
| 1189 | return &dum->ep [0]; |
| 1190 | for (i = 1; i < DUMMY_ENDPOINTS; i++) { |
| 1191 | struct dummy_ep *ep = &dum->ep [i]; |
| 1192 | |
| 1193 | if (!ep->desc) |
| 1194 | continue; |
| 1195 | if (ep->desc->bEndpointAddress == address) |
| 1196 | return ep; |
| 1197 | } |
| 1198 | return NULL; |
| 1199 | } |
| 1200 | |
| 1201 | #undef is_active |
| 1202 | |
| 1203 | #define Dev_Request (USB_TYPE_STANDARD | USB_RECIP_DEVICE) |
| 1204 | #define Dev_InRequest (Dev_Request | USB_DIR_IN) |
| 1205 | #define Intf_Request (USB_TYPE_STANDARD | USB_RECIP_INTERFACE) |
| 1206 | #define Intf_InRequest (Intf_Request | USB_DIR_IN) |
| 1207 | #define Ep_Request (USB_TYPE_STANDARD | USB_RECIP_ENDPOINT) |
| 1208 | #define Ep_InRequest (Ep_Request | USB_DIR_IN) |
| 1209 | |
| 1210 | /* drive both sides of the transfers; looks like irq handlers to |
| 1211 | * both drivers except the callbacks aren't in_irq(). |
| 1212 | */ |
| 1213 | static void dummy_timer (unsigned long _dum) |
| 1214 | { |
| 1215 | struct dummy *dum = (struct dummy *) _dum; |
| 1216 | struct urbp *urbp, *tmp; |
| 1217 | unsigned long flags; |
| 1218 | int limit, total; |
| 1219 | int i; |
| 1220 | |
| 1221 | /* simplistic model for one frame's bandwidth */ |
| 1222 | switch (dum->gadget.speed) { |
| 1223 | case USB_SPEED_LOW: |
| 1224 | total = 8/*bytes*/ * 12/*packets*/; |
| 1225 | break; |
| 1226 | case USB_SPEED_FULL: |
| 1227 | total = 64/*bytes*/ * 19/*packets*/; |
| 1228 | break; |
| 1229 | case USB_SPEED_HIGH: |
| 1230 | total = 512/*bytes*/ * 13/*packets*/ * 8/*uframes*/; |
| 1231 | break; |
| 1232 | default: |
| 1233 | dev_err (dummy_dev(dum), "bogus device speed\n"); |
| 1234 | return; |
| 1235 | } |
| 1236 | |
| 1237 | /* FIXME if HZ != 1000 this will probably misbehave ... */ |
| 1238 | |
| 1239 | /* look at each urb queued by the host side driver */ |
| 1240 | spin_lock_irqsave (&dum->lock, flags); |
| 1241 | |
| 1242 | if (!dum->udev) { |
| 1243 | dev_err (dummy_dev(dum), |
| 1244 | "timer fired with no URBs pending?\n"); |
| 1245 | spin_unlock_irqrestore (&dum->lock, flags); |
| 1246 | return; |
| 1247 | } |
| 1248 | |
| 1249 | for (i = 0; i < DUMMY_ENDPOINTS; i++) { |
| 1250 | if (!ep_name [i]) |
| 1251 | break; |
| 1252 | dum->ep [i].already_seen = 0; |
| 1253 | } |
| 1254 | |
| 1255 | restart: |
| 1256 | list_for_each_entry_safe (urbp, tmp, &dum->urbp_list, urbp_list) { |
| 1257 | struct urb *urb; |
| 1258 | struct dummy_request *req; |
| 1259 | u8 address; |
| 1260 | struct dummy_ep *ep = NULL; |
| 1261 | int type; |
| 1262 | |
| 1263 | urb = urbp->urb; |
| 1264 | if (urb->status != -EINPROGRESS) { |
| 1265 | /* likely it was just unlinked */ |
| 1266 | goto return_urb; |
Alan Stern | 391eca9 | 2005-05-10 15:34:16 -0400 | [diff] [blame] | 1267 | } else if (dum->rh_state != DUMMY_RH_RUNNING) |
| 1268 | continue; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1269 | type = usb_pipetype (urb->pipe); |
| 1270 | |
| 1271 | /* used up this frame's non-periodic bandwidth? |
| 1272 | * FIXME there's infinite bandwidth for control and |
| 1273 | * periodic transfers ... unrealistic. |
| 1274 | */ |
| 1275 | if (total <= 0 && type == PIPE_BULK) |
| 1276 | continue; |
| 1277 | |
| 1278 | /* find the gadget's ep for this request (if configured) */ |
| 1279 | address = usb_pipeendpoint (urb->pipe); |
| 1280 | if (usb_pipein (urb->pipe)) |
| 1281 | address |= USB_DIR_IN; |
| 1282 | ep = find_endpoint(dum, address); |
| 1283 | if (!ep) { |
| 1284 | /* set_configuration() disagreement */ |
| 1285 | dev_dbg (dummy_dev(dum), |
| 1286 | "no ep configured for urb %p\n", |
| 1287 | urb); |
| 1288 | maybe_set_status (urb, -EPROTO); |
| 1289 | goto return_urb; |
| 1290 | } |
| 1291 | |
| 1292 | if (ep->already_seen) |
| 1293 | continue; |
| 1294 | ep->already_seen = 1; |
| 1295 | if (ep == &dum->ep [0] && urb->error_count) { |
| 1296 | ep->setup_stage = 1; /* a new urb */ |
| 1297 | urb->error_count = 0; |
| 1298 | } |
| 1299 | if (ep->halted && !ep->setup_stage) { |
| 1300 | /* NOTE: must not be iso! */ |
| 1301 | dev_dbg (dummy_dev(dum), "ep %s halted, urb %p\n", |
| 1302 | ep->ep.name, urb); |
| 1303 | maybe_set_status (urb, -EPIPE); |
| 1304 | goto return_urb; |
| 1305 | } |
| 1306 | /* FIXME make sure both ends agree on maxpacket */ |
| 1307 | |
| 1308 | /* handle control requests */ |
| 1309 | if (ep == &dum->ep [0] && ep->setup_stage) { |
| 1310 | struct usb_ctrlrequest setup; |
| 1311 | int value = 1; |
| 1312 | struct dummy_ep *ep2; |
Alan Stern | cc095b0 | 2005-05-10 15:28:38 -0400 | [diff] [blame] | 1313 | unsigned w_index; |
| 1314 | unsigned w_value; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1315 | |
| 1316 | setup = *(struct usb_ctrlrequest*) urb->setup_packet; |
Alan Stern | cc095b0 | 2005-05-10 15:28:38 -0400 | [diff] [blame] | 1317 | w_index = le16_to_cpu(setup.wIndex); |
| 1318 | w_value = le16_to_cpu(setup.wValue); |
| 1319 | if (le16_to_cpu(setup.wLength) != |
| 1320 | urb->transfer_buffer_length) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1321 | maybe_set_status (urb, -EOVERFLOW); |
| 1322 | goto return_urb; |
| 1323 | } |
| 1324 | |
| 1325 | /* paranoia, in case of stale queued data */ |
| 1326 | list_for_each_entry (req, &ep->queue, queue) { |
| 1327 | list_del_init (&req->queue); |
| 1328 | req->req.status = -EOVERFLOW; |
Alan Stern | d9b7625 | 2005-05-03 16:15:43 -0400 | [diff] [blame] | 1329 | dev_dbg (udc_dev(dum), "stale req = %p\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1330 | req); |
| 1331 | |
| 1332 | spin_unlock (&dum->lock); |
| 1333 | req->req.complete (&ep->ep, &req->req); |
| 1334 | spin_lock (&dum->lock); |
| 1335 | ep->already_seen = 0; |
| 1336 | goto restart; |
| 1337 | } |
| 1338 | |
| 1339 | /* gadget driver never sees set_address or operations |
| 1340 | * on standard feature flags. some hardware doesn't |
| 1341 | * even expose them. |
| 1342 | */ |
| 1343 | ep->last_io = jiffies; |
| 1344 | ep->setup_stage = 0; |
| 1345 | ep->halted = 0; |
| 1346 | switch (setup.bRequest) { |
| 1347 | case USB_REQ_SET_ADDRESS: |
| 1348 | if (setup.bRequestType != Dev_Request) |
| 1349 | break; |
Alan Stern | cc095b0 | 2005-05-10 15:28:38 -0400 | [diff] [blame] | 1350 | dum->address = w_value; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1351 | maybe_set_status (urb, 0); |
Alan Stern | d9b7625 | 2005-05-03 16:15:43 -0400 | [diff] [blame] | 1352 | dev_dbg (udc_dev(dum), "set_address = %d\n", |
Alan Stern | cc095b0 | 2005-05-10 15:28:38 -0400 | [diff] [blame] | 1353 | w_value); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1354 | value = 0; |
| 1355 | break; |
| 1356 | case USB_REQ_SET_FEATURE: |
| 1357 | if (setup.bRequestType == Dev_Request) { |
| 1358 | value = 0; |
Alan Stern | cc095b0 | 2005-05-10 15:28:38 -0400 | [diff] [blame] | 1359 | switch (w_value) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1360 | case USB_DEVICE_REMOTE_WAKEUP: |
| 1361 | break; |
Alan Stern | 5742b0c | 2005-05-02 11:25:17 -0400 | [diff] [blame] | 1362 | case USB_DEVICE_B_HNP_ENABLE: |
| 1363 | dum->gadget.b_hnp_enable = 1; |
| 1364 | break; |
| 1365 | case USB_DEVICE_A_HNP_SUPPORT: |
| 1366 | dum->gadget.a_hnp_support = 1; |
| 1367 | break; |
| 1368 | case USB_DEVICE_A_ALT_HNP_SUPPORT: |
| 1369 | dum->gadget.a_alt_hnp_support |
| 1370 | = 1; |
| 1371 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1372 | default: |
| 1373 | value = -EOPNOTSUPP; |
| 1374 | } |
| 1375 | if (value == 0) { |
| 1376 | dum->devstatus |= |
Alan Stern | cc095b0 | 2005-05-10 15:28:38 -0400 | [diff] [blame] | 1377 | (1 << w_value); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1378 | maybe_set_status (urb, 0); |
| 1379 | } |
| 1380 | |
| 1381 | } else if (setup.bRequestType == Ep_Request) { |
| 1382 | // endpoint halt |
Alan Stern | cc095b0 | 2005-05-10 15:28:38 -0400 | [diff] [blame] | 1383 | ep2 = find_endpoint (dum, w_index); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1384 | if (!ep2) { |
| 1385 | value = -EOPNOTSUPP; |
| 1386 | break; |
| 1387 | } |
| 1388 | ep2->halted = 1; |
| 1389 | value = 0; |
| 1390 | maybe_set_status (urb, 0); |
| 1391 | } |
| 1392 | break; |
| 1393 | case USB_REQ_CLEAR_FEATURE: |
| 1394 | if (setup.bRequestType == Dev_Request) { |
Alan Stern | cc095b0 | 2005-05-10 15:28:38 -0400 | [diff] [blame] | 1395 | switch (w_value) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1396 | case USB_DEVICE_REMOTE_WAKEUP: |
| 1397 | dum->devstatus &= ~(1 << |
| 1398 | USB_DEVICE_REMOTE_WAKEUP); |
| 1399 | value = 0; |
| 1400 | maybe_set_status (urb, 0); |
| 1401 | break; |
| 1402 | default: |
| 1403 | value = -EOPNOTSUPP; |
| 1404 | break; |
| 1405 | } |
| 1406 | } else if (setup.bRequestType == Ep_Request) { |
| 1407 | // endpoint halt |
Alan Stern | cc095b0 | 2005-05-10 15:28:38 -0400 | [diff] [blame] | 1408 | ep2 = find_endpoint (dum, w_index); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1409 | if (!ep2) { |
| 1410 | value = -EOPNOTSUPP; |
| 1411 | break; |
| 1412 | } |
| 1413 | ep2->halted = 0; |
| 1414 | value = 0; |
| 1415 | maybe_set_status (urb, 0); |
| 1416 | } |
| 1417 | break; |
| 1418 | case USB_REQ_GET_STATUS: |
| 1419 | if (setup.bRequestType == Dev_InRequest |
| 1420 | || setup.bRequestType |
| 1421 | == Intf_InRequest |
| 1422 | || setup.bRequestType |
| 1423 | == Ep_InRequest |
| 1424 | ) { |
| 1425 | char *buf; |
| 1426 | |
| 1427 | // device: remote wakeup, selfpowered |
| 1428 | // interface: nothing |
| 1429 | // endpoint: halt |
| 1430 | buf = (char *)urb->transfer_buffer; |
| 1431 | if (urb->transfer_buffer_length > 0) { |
| 1432 | if (setup.bRequestType == |
| 1433 | Ep_InRequest) { |
Alan Stern | cc095b0 | 2005-05-10 15:28:38 -0400 | [diff] [blame] | 1434 | ep2 = find_endpoint (dum, w_index); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1435 | if (!ep2) { |
| 1436 | value = -EOPNOTSUPP; |
| 1437 | break; |
| 1438 | } |
| 1439 | buf [0] = ep2->halted; |
| 1440 | } else if (setup.bRequestType == |
| 1441 | Dev_InRequest) { |
| 1442 | buf [0] = (u8) |
| 1443 | dum->devstatus; |
| 1444 | } else |
| 1445 | buf [0] = 0; |
| 1446 | } |
| 1447 | if (urb->transfer_buffer_length > 1) |
| 1448 | buf [1] = 0; |
| 1449 | urb->actual_length = min (2, |
| 1450 | urb->transfer_buffer_length); |
| 1451 | value = 0; |
| 1452 | maybe_set_status (urb, 0); |
| 1453 | } |
| 1454 | break; |
| 1455 | } |
| 1456 | |
| 1457 | /* gadget driver handles all other requests. block |
| 1458 | * until setup() returns; no reentrancy issues etc. |
| 1459 | */ |
| 1460 | if (value > 0) { |
| 1461 | spin_unlock (&dum->lock); |
| 1462 | value = dum->driver->setup (&dum->gadget, |
| 1463 | &setup); |
| 1464 | spin_lock (&dum->lock); |
| 1465 | |
| 1466 | if (value >= 0) { |
| 1467 | /* no delays (max 64KB data stage) */ |
| 1468 | limit = 64*1024; |
| 1469 | goto treat_control_like_bulk; |
| 1470 | } |
| 1471 | /* error, see below */ |
| 1472 | } |
| 1473 | |
| 1474 | if (value < 0) { |
| 1475 | if (value != -EOPNOTSUPP) |
Alan Stern | d9b7625 | 2005-05-03 16:15:43 -0400 | [diff] [blame] | 1476 | dev_dbg (udc_dev(dum), |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1477 | "setup --> %d\n", |
| 1478 | value); |
| 1479 | maybe_set_status (urb, -EPIPE); |
| 1480 | urb->actual_length = 0; |
| 1481 | } |
| 1482 | |
| 1483 | goto return_urb; |
| 1484 | } |
| 1485 | |
| 1486 | /* non-control requests */ |
| 1487 | limit = total; |
| 1488 | switch (usb_pipetype (urb->pipe)) { |
| 1489 | case PIPE_ISOCHRONOUS: |
| 1490 | /* FIXME is it urb->interval since the last xfer? |
| 1491 | * use urb->iso_frame_desc[i]. |
| 1492 | * complete whether or not ep has requests queued. |
| 1493 | * report random errors, to debug drivers. |
| 1494 | */ |
| 1495 | limit = max (limit, periodic_bytes (dum, ep)); |
| 1496 | maybe_set_status (urb, -ENOSYS); |
| 1497 | break; |
| 1498 | |
| 1499 | case PIPE_INTERRUPT: |
| 1500 | /* FIXME is it urb->interval since the last xfer? |
| 1501 | * this almost certainly polls too fast. |
| 1502 | */ |
| 1503 | limit = max (limit, periodic_bytes (dum, ep)); |
| 1504 | /* FALLTHROUGH */ |
| 1505 | |
| 1506 | // case PIPE_BULK: case PIPE_CONTROL: |
| 1507 | default: |
| 1508 | treat_control_like_bulk: |
| 1509 | ep->last_io = jiffies; |
| 1510 | total = transfer (dum, urb, ep, limit); |
| 1511 | break; |
| 1512 | } |
| 1513 | |
| 1514 | /* incomplete transfer? */ |
| 1515 | if (urb->status == -EINPROGRESS) |
| 1516 | continue; |
| 1517 | |
| 1518 | return_urb: |
| 1519 | urb->hcpriv = NULL; |
| 1520 | list_del (&urbp->urbp_list); |
| 1521 | kfree (urbp); |
| 1522 | if (ep) |
| 1523 | ep->already_seen = ep->setup_stage = 0; |
| 1524 | |
Alan Stern | e9df41c | 2007-08-08 11:48:02 -0400 | [diff] [blame^] | 1525 | usb_hcd_unlink_urb_from_ep(dummy_to_hcd(dum), urb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1526 | spin_unlock (&dum->lock); |
Al Viro | 2843114 | 2006-10-08 15:00:12 +0100 | [diff] [blame] | 1527 | usb_hcd_giveback_urb (dummy_to_hcd(dum), urb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1528 | spin_lock (&dum->lock); |
| 1529 | |
| 1530 | goto restart; |
| 1531 | } |
| 1532 | |
Alan Stern | 391eca9 | 2005-05-10 15:34:16 -0400 | [diff] [blame] | 1533 | if (list_empty (&dum->urbp_list)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1534 | usb_put_dev (dum->udev); |
| 1535 | dum->udev = NULL; |
Alan Stern | 391eca9 | 2005-05-10 15:34:16 -0400 | [diff] [blame] | 1536 | } else if (dum->rh_state == DUMMY_RH_RUNNING) { |
| 1537 | /* want a 1 msec delay here */ |
| 1538 | mod_timer (&dum->timer, jiffies + msecs_to_jiffies(1)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1539 | } |
| 1540 | |
| 1541 | spin_unlock_irqrestore (&dum->lock, flags); |
| 1542 | } |
| 1543 | |
| 1544 | /*-------------------------------------------------------------------------*/ |
| 1545 | |
| 1546 | #define PORT_C_MASK \ |
Alan Stern | c2db8b5 | 2005-04-29 16:30:48 -0400 | [diff] [blame] | 1547 | ((USB_PORT_STAT_C_CONNECTION \ |
| 1548 | | USB_PORT_STAT_C_ENABLE \ |
| 1549 | | USB_PORT_STAT_C_SUSPEND \ |
| 1550 | | USB_PORT_STAT_C_OVERCURRENT \ |
| 1551 | | USB_PORT_STAT_C_RESET) << 16) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1552 | |
| 1553 | static int dummy_hub_status (struct usb_hcd *hcd, char *buf) |
| 1554 | { |
| 1555 | struct dummy *dum; |
| 1556 | unsigned long flags; |
Alan Stern | 391eca9 | 2005-05-10 15:34:16 -0400 | [diff] [blame] | 1557 | int retval = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1558 | |
| 1559 | dum = hcd_to_dummy (hcd); |
| 1560 | |
| 1561 | spin_lock_irqsave (&dum->lock, flags); |
Alan Stern | 3cf0a22 | 2005-11-29 12:08:15 -0500 | [diff] [blame] | 1562 | if (!test_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags)) |
Alan Stern | 391eca9 | 2005-05-10 15:34:16 -0400 | [diff] [blame] | 1563 | goto done; |
Alan Stern | f1c39fa | 2005-05-03 16:24:04 -0400 | [diff] [blame] | 1564 | |
| 1565 | if (dum->resuming && time_after_eq (jiffies, dum->re_timeout)) { |
| 1566 | dum->port_status |= (USB_PORT_STAT_C_SUSPEND << 16); |
| 1567 | dum->port_status &= ~USB_PORT_STAT_SUSPEND; |
| 1568 | set_link_state (dum); |
| 1569 | } |
| 1570 | |
Alan Stern | 391eca9 | 2005-05-10 15:34:16 -0400 | [diff] [blame] | 1571 | if ((dum->port_status & PORT_C_MASK) != 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1572 | *buf = (1 << 1); |
| 1573 | dev_dbg (dummy_dev(dum), "port status 0x%08x has changes\n", |
Alan Stern | 391eca9 | 2005-05-10 15:34:16 -0400 | [diff] [blame] | 1574 | dum->port_status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1575 | retval = 1; |
Alan Stern | 391eca9 | 2005-05-10 15:34:16 -0400 | [diff] [blame] | 1576 | if (dum->rh_state == DUMMY_RH_SUSPENDED) |
| 1577 | usb_hcd_resume_root_hub (hcd); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1578 | } |
Alan Stern | 391eca9 | 2005-05-10 15:34:16 -0400 | [diff] [blame] | 1579 | done: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1580 | spin_unlock_irqrestore (&dum->lock, flags); |
| 1581 | return retval; |
| 1582 | } |
| 1583 | |
| 1584 | static inline void |
| 1585 | hub_descriptor (struct usb_hub_descriptor *desc) |
| 1586 | { |
| 1587 | memset (desc, 0, sizeof *desc); |
| 1588 | desc->bDescriptorType = 0x29; |
| 1589 | desc->bDescLength = 9; |
Alan Stern | cc095b0 | 2005-05-10 15:28:38 -0400 | [diff] [blame] | 1590 | desc->wHubCharacteristics = (__force __u16) |
| 1591 | (__constant_cpu_to_le16 (0x0001)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1592 | desc->bNbrPorts = 1; |
| 1593 | desc->bitmap [0] = 0xff; |
| 1594 | desc->bitmap [1] = 0xff; |
| 1595 | } |
| 1596 | |
| 1597 | static int dummy_hub_control ( |
| 1598 | struct usb_hcd *hcd, |
| 1599 | u16 typeReq, |
| 1600 | u16 wValue, |
| 1601 | u16 wIndex, |
| 1602 | char *buf, |
| 1603 | u16 wLength |
| 1604 | ) { |
| 1605 | struct dummy *dum; |
| 1606 | int retval = 0; |
| 1607 | unsigned long flags; |
| 1608 | |
Alan Stern | 3cf0a22 | 2005-11-29 12:08:15 -0500 | [diff] [blame] | 1609 | if (!test_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags)) |
Alan Stern | 391eca9 | 2005-05-10 15:34:16 -0400 | [diff] [blame] | 1610 | return -ETIMEDOUT; |
| 1611 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1612 | dum = hcd_to_dummy (hcd); |
| 1613 | spin_lock_irqsave (&dum->lock, flags); |
| 1614 | switch (typeReq) { |
| 1615 | case ClearHubFeature: |
| 1616 | break; |
| 1617 | case ClearPortFeature: |
| 1618 | switch (wValue) { |
| 1619 | case USB_PORT_FEAT_SUSPEND: |
Alan Stern | c2db8b5 | 2005-04-29 16:30:48 -0400 | [diff] [blame] | 1620 | if (dum->port_status & USB_PORT_STAT_SUSPEND) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1621 | /* 20msec resume signaling */ |
| 1622 | dum->resuming = 1; |
| 1623 | dum->re_timeout = jiffies + |
Alan Stern | f1c39fa | 2005-05-03 16:24:04 -0400 | [diff] [blame] | 1624 | msecs_to_jiffies(20); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1625 | } |
| 1626 | break; |
| 1627 | case USB_PORT_FEAT_POWER: |
Alan Stern | f1c39fa | 2005-05-03 16:24:04 -0400 | [diff] [blame] | 1628 | if (dum->port_status & USB_PORT_STAT_POWER) |
| 1629 | dev_dbg (dummy_dev(dum), "power-off\n"); |
| 1630 | /* FALLS THROUGH */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1631 | default: |
| 1632 | dum->port_status &= ~(1 << wValue); |
Alan Stern | f1c39fa | 2005-05-03 16:24:04 -0400 | [diff] [blame] | 1633 | set_link_state (dum); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1634 | } |
| 1635 | break; |
| 1636 | case GetHubDescriptor: |
| 1637 | hub_descriptor ((struct usb_hub_descriptor *) buf); |
| 1638 | break; |
| 1639 | case GetHubStatus: |
Alan Stern | cc095b0 | 2005-05-10 15:28:38 -0400 | [diff] [blame] | 1640 | *(__le32 *) buf = __constant_cpu_to_le32 (0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1641 | break; |
| 1642 | case GetPortStatus: |
| 1643 | if (wIndex != 1) |
| 1644 | retval = -EPIPE; |
| 1645 | |
| 1646 | /* whoever resets or resumes must GetPortStatus to |
| 1647 | * complete it!! |
| 1648 | */ |
Alan Stern | f1c39fa | 2005-05-03 16:24:04 -0400 | [diff] [blame] | 1649 | if (dum->resuming && |
| 1650 | time_after_eq (jiffies, dum->re_timeout)) { |
Alan Stern | c2db8b5 | 2005-04-29 16:30:48 -0400 | [diff] [blame] | 1651 | dum->port_status |= (USB_PORT_STAT_C_SUSPEND << 16); |
| 1652 | dum->port_status &= ~USB_PORT_STAT_SUSPEND; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1653 | } |
Alan Stern | f1c39fa | 2005-05-03 16:24:04 -0400 | [diff] [blame] | 1654 | if ((dum->port_status & USB_PORT_STAT_RESET) != 0 && |
| 1655 | time_after_eq (jiffies, dum->re_timeout)) { |
Alan Stern | c2db8b5 | 2005-04-29 16:30:48 -0400 | [diff] [blame] | 1656 | dum->port_status |= (USB_PORT_STAT_C_RESET << 16); |
| 1657 | dum->port_status &= ~USB_PORT_STAT_RESET; |
Alan Stern | f1c39fa | 2005-05-03 16:24:04 -0400 | [diff] [blame] | 1658 | if (dum->pullup) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1659 | dum->port_status |= USB_PORT_STAT_ENABLE; |
| 1660 | /* give it the best speed we agree on */ |
| 1661 | dum->gadget.speed = dum->driver->speed; |
| 1662 | dum->gadget.ep0->maxpacket = 64; |
| 1663 | switch (dum->gadget.speed) { |
| 1664 | case USB_SPEED_HIGH: |
| 1665 | dum->port_status |= |
| 1666 | USB_PORT_STAT_HIGH_SPEED; |
| 1667 | break; |
| 1668 | case USB_SPEED_LOW: |
| 1669 | dum->gadget.ep0->maxpacket = 8; |
| 1670 | dum->port_status |= |
| 1671 | USB_PORT_STAT_LOW_SPEED; |
| 1672 | break; |
| 1673 | default: |
| 1674 | dum->gadget.speed = USB_SPEED_FULL; |
| 1675 | break; |
| 1676 | } |
| 1677 | } |
| 1678 | } |
Alan Stern | f1c39fa | 2005-05-03 16:24:04 -0400 | [diff] [blame] | 1679 | set_link_state (dum); |
Alan Stern | cc095b0 | 2005-05-10 15:28:38 -0400 | [diff] [blame] | 1680 | ((__le16 *) buf)[0] = cpu_to_le16 (dum->port_status); |
| 1681 | ((__le16 *) buf)[1] = cpu_to_le16 (dum->port_status >> 16); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1682 | break; |
| 1683 | case SetHubFeature: |
| 1684 | retval = -EPIPE; |
| 1685 | break; |
| 1686 | case SetPortFeature: |
| 1687 | switch (wValue) { |
| 1688 | case USB_PORT_FEAT_SUSPEND: |
Alan Stern | f1c39fa | 2005-05-03 16:24:04 -0400 | [diff] [blame] | 1689 | if (dum->active) { |
Alan Stern | c2db8b5 | 2005-04-29 16:30:48 -0400 | [diff] [blame] | 1690 | dum->port_status |= USB_PORT_STAT_SUSPEND; |
Alan Stern | f1c39fa | 2005-05-03 16:24:04 -0400 | [diff] [blame] | 1691 | |
| 1692 | /* HNP would happen here; for now we |
| 1693 | * assume b_bus_req is always true. |
| 1694 | */ |
| 1695 | set_link_state (dum); |
| 1696 | if (((1 << USB_DEVICE_B_HNP_ENABLE) |
| 1697 | & dum->devstatus) != 0) |
| 1698 | dev_dbg (dummy_dev(dum), |
Alan Stern | 5742b0c | 2005-05-02 11:25:17 -0400 | [diff] [blame] | 1699 | "no HNP yet!\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1700 | } |
| 1701 | break; |
Alan Stern | f1c39fa | 2005-05-03 16:24:04 -0400 | [diff] [blame] | 1702 | case USB_PORT_FEAT_POWER: |
| 1703 | dum->port_status |= USB_PORT_STAT_POWER; |
| 1704 | set_link_state (dum); |
| 1705 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1706 | case USB_PORT_FEAT_RESET: |
Alan Stern | f1c39fa | 2005-05-03 16:24:04 -0400 | [diff] [blame] | 1707 | /* if it's already enabled, disable */ |
| 1708 | dum->port_status &= ~(USB_PORT_STAT_ENABLE |
| 1709 | | USB_PORT_STAT_LOW_SPEED |
| 1710 | | USB_PORT_STAT_HIGH_SPEED); |
Alan Stern | 391eca9 | 2005-05-10 15:34:16 -0400 | [diff] [blame] | 1711 | dum->devstatus = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1712 | /* 50msec reset signaling */ |
| 1713 | dum->re_timeout = jiffies + msecs_to_jiffies(50); |
Alan Stern | f1c39fa | 2005-05-03 16:24:04 -0400 | [diff] [blame] | 1714 | /* FALLS THROUGH */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1715 | default: |
Alan Stern | f1c39fa | 2005-05-03 16:24:04 -0400 | [diff] [blame] | 1716 | if ((dum->port_status & USB_PORT_STAT_POWER) != 0) { |
| 1717 | dum->port_status |= (1 << wValue); |
| 1718 | set_link_state (dum); |
| 1719 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1720 | } |
| 1721 | break; |
| 1722 | |
| 1723 | default: |
| 1724 | dev_dbg (dummy_dev(dum), |
| 1725 | "hub control req%04x v%04x i%04x l%d\n", |
| 1726 | typeReq, wValue, wIndex, wLength); |
| 1727 | |
| 1728 | /* "protocol stall" on error */ |
| 1729 | retval = -EPIPE; |
| 1730 | } |
| 1731 | spin_unlock_irqrestore (&dum->lock, flags); |
Alan Stern | 685eb93 | 2005-05-03 16:27:26 -0400 | [diff] [blame] | 1732 | |
| 1733 | if ((dum->port_status & PORT_C_MASK) != 0) |
| 1734 | usb_hcd_poll_rh_status (hcd); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1735 | return retval; |
| 1736 | } |
| 1737 | |
Alan Stern | 0c0382e | 2005-10-13 17:08:02 -0400 | [diff] [blame] | 1738 | static int dummy_bus_suspend (struct usb_hcd *hcd) |
Alan Stern | 391eca9 | 2005-05-10 15:34:16 -0400 | [diff] [blame] | 1739 | { |
| 1740 | struct dummy *dum = hcd_to_dummy (hcd); |
| 1741 | |
Alan Stern | 3cf0a22 | 2005-11-29 12:08:15 -0500 | [diff] [blame] | 1742 | dev_dbg (&hcd->self.root_hub->dev, "%s\n", __FUNCTION__); |
| 1743 | |
Alan Stern | 391eca9 | 2005-05-10 15:34:16 -0400 | [diff] [blame] | 1744 | spin_lock_irq (&dum->lock); |
| 1745 | dum->rh_state = DUMMY_RH_SUSPENDED; |
| 1746 | set_link_state (dum); |
Alan Stern | 3cf0a22 | 2005-11-29 12:08:15 -0500 | [diff] [blame] | 1747 | hcd->state = HC_STATE_SUSPENDED; |
Alan Stern | 391eca9 | 2005-05-10 15:34:16 -0400 | [diff] [blame] | 1748 | spin_unlock_irq (&dum->lock); |
| 1749 | return 0; |
| 1750 | } |
| 1751 | |
Alan Stern | 0c0382e | 2005-10-13 17:08:02 -0400 | [diff] [blame] | 1752 | static int dummy_bus_resume (struct usb_hcd *hcd) |
Alan Stern | 391eca9 | 2005-05-10 15:34:16 -0400 | [diff] [blame] | 1753 | { |
| 1754 | struct dummy *dum = hcd_to_dummy (hcd); |
Alan Stern | 3cf0a22 | 2005-11-29 12:08:15 -0500 | [diff] [blame] | 1755 | int rc = 0; |
| 1756 | |
| 1757 | dev_dbg (&hcd->self.root_hub->dev, "%s\n", __FUNCTION__); |
Alan Stern | 391eca9 | 2005-05-10 15:34:16 -0400 | [diff] [blame] | 1758 | |
| 1759 | spin_lock_irq (&dum->lock); |
Alan Stern | 3cf0a22 | 2005-11-29 12:08:15 -0500 | [diff] [blame] | 1760 | if (!test_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags)) { |
Alan Stern | cfa59da | 2007-06-21 16:25:35 -0400 | [diff] [blame] | 1761 | rc = -ESHUTDOWN; |
Alan Stern | 3cf0a22 | 2005-11-29 12:08:15 -0500 | [diff] [blame] | 1762 | } else { |
| 1763 | dum->rh_state = DUMMY_RH_RUNNING; |
| 1764 | set_link_state (dum); |
| 1765 | if (!list_empty(&dum->urbp_list)) |
| 1766 | mod_timer (&dum->timer, jiffies); |
| 1767 | hcd->state = HC_STATE_RUNNING; |
| 1768 | } |
Alan Stern | 391eca9 | 2005-05-10 15:34:16 -0400 | [diff] [blame] | 1769 | spin_unlock_irq (&dum->lock); |
Alan Stern | 3cf0a22 | 2005-11-29 12:08:15 -0500 | [diff] [blame] | 1770 | return rc; |
Alan Stern | 391eca9 | 2005-05-10 15:34:16 -0400 | [diff] [blame] | 1771 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1772 | |
| 1773 | /*-------------------------------------------------------------------------*/ |
| 1774 | |
| 1775 | static inline ssize_t |
| 1776 | show_urb (char *buf, size_t size, struct urb *urb) |
| 1777 | { |
| 1778 | int ep = usb_pipeendpoint (urb->pipe); |
| 1779 | |
| 1780 | return snprintf (buf, size, |
| 1781 | "urb/%p %s ep%d%s%s len %d/%d\n", |
| 1782 | urb, |
| 1783 | ({ char *s; |
| 1784 | switch (urb->dev->speed) { |
| 1785 | case USB_SPEED_LOW: s = "ls"; break; |
| 1786 | case USB_SPEED_FULL: s = "fs"; break; |
| 1787 | case USB_SPEED_HIGH: s = "hs"; break; |
| 1788 | default: s = "?"; break; |
| 1789 | }; s; }), |
| 1790 | ep, ep ? (usb_pipein (urb->pipe) ? "in" : "out") : "", |
| 1791 | ({ char *s; \ |
| 1792 | switch (usb_pipetype (urb->pipe)) { \ |
| 1793 | case PIPE_CONTROL: s = ""; break; \ |
| 1794 | case PIPE_BULK: s = "-bulk"; break; \ |
| 1795 | case PIPE_INTERRUPT: s = "-int"; break; \ |
| 1796 | default: s = "-iso"; break; \ |
| 1797 | }; s;}), |
| 1798 | urb->actual_length, urb->transfer_buffer_length); |
| 1799 | } |
| 1800 | |
| 1801 | static ssize_t |
Yani Ioannou | 10523b3 | 2005-05-17 06:43:37 -0400 | [diff] [blame] | 1802 | show_urbs (struct device *dev, struct device_attribute *attr, char *buf) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1803 | { |
| 1804 | struct usb_hcd *hcd = dev_get_drvdata (dev); |
| 1805 | struct dummy *dum = hcd_to_dummy (hcd); |
| 1806 | struct urbp *urbp; |
| 1807 | size_t size = 0; |
| 1808 | unsigned long flags; |
| 1809 | |
| 1810 | spin_lock_irqsave (&dum->lock, flags); |
| 1811 | list_for_each_entry (urbp, &dum->urbp_list, urbp_list) { |
| 1812 | size_t temp; |
| 1813 | |
| 1814 | temp = show_urb (buf, PAGE_SIZE - size, urbp->urb); |
| 1815 | buf += temp; |
| 1816 | size += temp; |
| 1817 | } |
| 1818 | spin_unlock_irqrestore (&dum->lock, flags); |
| 1819 | |
| 1820 | return size; |
| 1821 | } |
| 1822 | static DEVICE_ATTR (urbs, S_IRUGO, show_urbs, NULL); |
| 1823 | |
| 1824 | static int dummy_start (struct usb_hcd *hcd) |
| 1825 | { |
| 1826 | struct dummy *dum; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1827 | |
| 1828 | dum = hcd_to_dummy (hcd); |
| 1829 | |
| 1830 | /* |
| 1831 | * MASTER side init ... we emulate a root hub that'll only ever |
| 1832 | * talk to one device (the slave side). Also appears in sysfs, |
| 1833 | * just like more familiar pci-based HCDs. |
| 1834 | */ |
| 1835 | spin_lock_init (&dum->lock); |
| 1836 | init_timer (&dum->timer); |
| 1837 | dum->timer.function = dummy_timer; |
| 1838 | dum->timer.data = (unsigned long) dum; |
Alan Stern | 391eca9 | 2005-05-10 15:34:16 -0400 | [diff] [blame] | 1839 | dum->rh_state = DUMMY_RH_RUNNING; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1840 | |
| 1841 | INIT_LIST_HEAD (&dum->urbp_list); |
| 1842 | |
Alan Stern | bc96c0a | 2005-04-25 11:21:31 -0400 | [diff] [blame] | 1843 | /* only show a low-power port: just 8mA */ |
| 1844 | hcd->power_budget = 8; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1845 | hcd->state = HC_STATE_RUNNING; |
Alan Stern | 685eb93 | 2005-05-03 16:27:26 -0400 | [diff] [blame] | 1846 | hcd->uses_new_polling = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1847 | |
Alan Stern | 5742b0c | 2005-05-02 11:25:17 -0400 | [diff] [blame] | 1848 | #ifdef CONFIG_USB_OTG |
| 1849 | hcd->self.otg_port = 1; |
| 1850 | #endif |
| 1851 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1852 | /* FIXME 'urbs' should be a per-device thing, maybe in usbcore */ |
Alan Stern | efd54a3 | 2006-09-25 11:55:56 -0400 | [diff] [blame] | 1853 | return device_create_file (dummy_dev(dum), &dev_attr_urbs); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1854 | } |
| 1855 | |
| 1856 | static void dummy_stop (struct usb_hcd *hcd) |
| 1857 | { |
| 1858 | struct dummy *dum; |
| 1859 | |
| 1860 | dum = hcd_to_dummy (hcd); |
| 1861 | |
| 1862 | device_remove_file (dummy_dev(dum), &dev_attr_urbs); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1863 | usb_gadget_unregister_driver (dum->driver); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1864 | dev_info (dummy_dev(dum), "stopped\n"); |
| 1865 | } |
| 1866 | |
| 1867 | /*-------------------------------------------------------------------------*/ |
| 1868 | |
| 1869 | static int dummy_h_get_frame (struct usb_hcd *hcd) |
| 1870 | { |
| 1871 | return dummy_g_get_frame (NULL); |
| 1872 | } |
| 1873 | |
| 1874 | static const struct hc_driver dummy_hcd = { |
| 1875 | .description = (char *) driver_name, |
| 1876 | .product_desc = "Dummy host controller", |
| 1877 | .hcd_priv_size = sizeof(struct dummy), |
| 1878 | |
| 1879 | .flags = HCD_USB2, |
| 1880 | |
| 1881 | .start = dummy_start, |
| 1882 | .stop = dummy_stop, |
| 1883 | |
| 1884 | .urb_enqueue = dummy_urb_enqueue, |
| 1885 | .urb_dequeue = dummy_urb_dequeue, |
| 1886 | |
| 1887 | .get_frame_number = dummy_h_get_frame, |
| 1888 | |
| 1889 | .hub_status_data = dummy_hub_status, |
| 1890 | .hub_control = dummy_hub_control, |
Alan Stern | 0c0382e | 2005-10-13 17:08:02 -0400 | [diff] [blame] | 1891 | .bus_suspend = dummy_bus_suspend, |
| 1892 | .bus_resume = dummy_bus_resume, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1893 | }; |
| 1894 | |
Alan Stern | 8364d6b | 2005-11-14 12:16:30 -0500 | [diff] [blame] | 1895 | static int dummy_hcd_probe(struct platform_device *pdev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1896 | { |
| 1897 | struct usb_hcd *hcd; |
| 1898 | int retval; |
| 1899 | |
Alan Stern | 8364d6b | 2005-11-14 12:16:30 -0500 | [diff] [blame] | 1900 | dev_info(&pdev->dev, "%s, driver " DRIVER_VERSION "\n", driver_desc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1901 | |
Alan Stern | 8364d6b | 2005-11-14 12:16:30 -0500 | [diff] [blame] | 1902 | hcd = usb_create_hcd(&dummy_hcd, &pdev->dev, pdev->dev.bus_id); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1903 | if (!hcd) |
| 1904 | return -ENOMEM; |
| 1905 | the_controller = hcd_to_dummy (hcd); |
| 1906 | |
| 1907 | retval = usb_add_hcd(hcd, 0, 0); |
| 1908 | if (retval != 0) { |
| 1909 | usb_put_hcd (hcd); |
| 1910 | the_controller = NULL; |
| 1911 | } |
| 1912 | return retval; |
| 1913 | } |
| 1914 | |
Alan Stern | 8364d6b | 2005-11-14 12:16:30 -0500 | [diff] [blame] | 1915 | static int dummy_hcd_remove (struct platform_device *pdev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1916 | { |
| 1917 | struct usb_hcd *hcd; |
| 1918 | |
Alan Stern | 8364d6b | 2005-11-14 12:16:30 -0500 | [diff] [blame] | 1919 | hcd = platform_get_drvdata (pdev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1920 | usb_remove_hcd (hcd); |
| 1921 | usb_put_hcd (hcd); |
| 1922 | the_controller = NULL; |
Alan Stern | d9b7625 | 2005-05-03 16:15:43 -0400 | [diff] [blame] | 1923 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1924 | } |
| 1925 | |
Alan Stern | 8364d6b | 2005-11-14 12:16:30 -0500 | [diff] [blame] | 1926 | static int dummy_hcd_suspend (struct platform_device *pdev, pm_message_t state) |
Alan Stern | 391eca9 | 2005-05-10 15:34:16 -0400 | [diff] [blame] | 1927 | { |
| 1928 | struct usb_hcd *hcd; |
Alan Stern | 3cf0a22 | 2005-11-29 12:08:15 -0500 | [diff] [blame] | 1929 | struct dummy *dum; |
| 1930 | int rc = 0; |
Alan Stern | 391eca9 | 2005-05-10 15:34:16 -0400 | [diff] [blame] | 1931 | |
Alan Stern | 8364d6b | 2005-11-14 12:16:30 -0500 | [diff] [blame] | 1932 | dev_dbg (&pdev->dev, "%s\n", __FUNCTION__); |
Alan Stern | 391eca9 | 2005-05-10 15:34:16 -0400 | [diff] [blame] | 1933 | |
Alan Stern | 3cf0a22 | 2005-11-29 12:08:15 -0500 | [diff] [blame] | 1934 | hcd = platform_get_drvdata (pdev); |
| 1935 | dum = hcd_to_dummy (hcd); |
| 1936 | if (dum->rh_state == DUMMY_RH_RUNNING) { |
| 1937 | dev_warn(&pdev->dev, "Root hub isn't suspended!\n"); |
| 1938 | rc = -EBUSY; |
| 1939 | } else |
| 1940 | clear_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags); |
| 1941 | return rc; |
Alan Stern | 391eca9 | 2005-05-10 15:34:16 -0400 | [diff] [blame] | 1942 | } |
| 1943 | |
Alan Stern | 8364d6b | 2005-11-14 12:16:30 -0500 | [diff] [blame] | 1944 | static int dummy_hcd_resume (struct platform_device *pdev) |
Alan Stern | 391eca9 | 2005-05-10 15:34:16 -0400 | [diff] [blame] | 1945 | { |
| 1946 | struct usb_hcd *hcd; |
| 1947 | |
Alan Stern | 8364d6b | 2005-11-14 12:16:30 -0500 | [diff] [blame] | 1948 | dev_dbg (&pdev->dev, "%s\n", __FUNCTION__); |
Alan Stern | 391eca9 | 2005-05-10 15:34:16 -0400 | [diff] [blame] | 1949 | |
Alan Stern | 3cf0a22 | 2005-11-29 12:08:15 -0500 | [diff] [blame] | 1950 | hcd = platform_get_drvdata (pdev); |
| 1951 | set_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags); |
Alan Stern | 391eca9 | 2005-05-10 15:34:16 -0400 | [diff] [blame] | 1952 | usb_hcd_poll_rh_status (hcd); |
| 1953 | return 0; |
| 1954 | } |
| 1955 | |
Russell King | 3ae5eae | 2005-11-09 22:32:44 +0000 | [diff] [blame] | 1956 | static struct platform_driver dummy_hcd_driver = { |
Alan Stern | d9b7625 | 2005-05-03 16:15:43 -0400 | [diff] [blame] | 1957 | .probe = dummy_hcd_probe, |
| 1958 | .remove = dummy_hcd_remove, |
Alan Stern | 391eca9 | 2005-05-10 15:34:16 -0400 | [diff] [blame] | 1959 | .suspend = dummy_hcd_suspend, |
| 1960 | .resume = dummy_hcd_resume, |
Russell King | 3ae5eae | 2005-11-09 22:32:44 +0000 | [diff] [blame] | 1961 | .driver = { |
| 1962 | .name = (char *) driver_name, |
| 1963 | .owner = THIS_MODULE, |
| 1964 | }, |
Alan Stern | d9b7625 | 2005-05-03 16:15:43 -0400 | [diff] [blame] | 1965 | }; |
| 1966 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1967 | /*-------------------------------------------------------------------------*/ |
| 1968 | |
Alan Stern | d9b7625 | 2005-05-03 16:15:43 -0400 | [diff] [blame] | 1969 | /* These don't need to do anything because the pdev structures are |
| 1970 | * statically allocated. */ |
| 1971 | static void |
| 1972 | dummy_udc_release (struct device *dev) {} |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1973 | |
Alan Stern | d9b7625 | 2005-05-03 16:15:43 -0400 | [diff] [blame] | 1974 | static void |
| 1975 | dummy_hcd_release (struct device *dev) {} |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1976 | |
Alan Stern | d9b7625 | 2005-05-03 16:15:43 -0400 | [diff] [blame] | 1977 | static struct platform_device the_udc_pdev = { |
| 1978 | .name = (char *) gadget_name, |
| 1979 | .id = -1, |
| 1980 | .dev = { |
| 1981 | .release = dummy_udc_release, |
| 1982 | }, |
| 1983 | }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1984 | |
Alan Stern | d9b7625 | 2005-05-03 16:15:43 -0400 | [diff] [blame] | 1985 | static struct platform_device the_hcd_pdev = { |
| 1986 | .name = (char *) driver_name, |
| 1987 | .id = -1, |
| 1988 | .dev = { |
| 1989 | .release = dummy_hcd_release, |
| 1990 | }, |
| 1991 | }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1992 | |
| 1993 | static int __init init (void) |
| 1994 | { |
| 1995 | int retval; |
| 1996 | |
| 1997 | if (usb_disabled ()) |
| 1998 | return -ENODEV; |
Alan Stern | d9b7625 | 2005-05-03 16:15:43 -0400 | [diff] [blame] | 1999 | |
Russell King | 3ae5eae | 2005-11-09 22:32:44 +0000 | [diff] [blame] | 2000 | retval = platform_driver_register (&dummy_hcd_driver); |
Alan Stern | d9b7625 | 2005-05-03 16:15:43 -0400 | [diff] [blame] | 2001 | if (retval < 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2002 | return retval; |
Alan Stern | d9b7625 | 2005-05-03 16:15:43 -0400 | [diff] [blame] | 2003 | |
Russell King | 3ae5eae | 2005-11-09 22:32:44 +0000 | [diff] [blame] | 2004 | retval = platform_driver_register (&dummy_udc_driver); |
Alan Stern | d9b7625 | 2005-05-03 16:15:43 -0400 | [diff] [blame] | 2005 | if (retval < 0) |
| 2006 | goto err_register_udc_driver; |
| 2007 | |
| 2008 | retval = platform_device_register (&the_hcd_pdev); |
| 2009 | if (retval < 0) |
| 2010 | goto err_register_hcd; |
| 2011 | |
| 2012 | retval = platform_device_register (&the_udc_pdev); |
| 2013 | if (retval < 0) |
| 2014 | goto err_register_udc; |
| 2015 | return retval; |
| 2016 | |
| 2017 | err_register_udc: |
| 2018 | platform_device_unregister (&the_hcd_pdev); |
| 2019 | err_register_hcd: |
Russell King | 3ae5eae | 2005-11-09 22:32:44 +0000 | [diff] [blame] | 2020 | platform_driver_unregister (&dummy_udc_driver); |
Alan Stern | d9b7625 | 2005-05-03 16:15:43 -0400 | [diff] [blame] | 2021 | err_register_udc_driver: |
Russell King | 3ae5eae | 2005-11-09 22:32:44 +0000 | [diff] [blame] | 2022 | platform_driver_unregister (&dummy_hcd_driver); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2023 | return retval; |
| 2024 | } |
| 2025 | module_init (init); |
| 2026 | |
| 2027 | static void __exit cleanup (void) |
| 2028 | { |
Alan Stern | d9b7625 | 2005-05-03 16:15:43 -0400 | [diff] [blame] | 2029 | platform_device_unregister (&the_udc_pdev); |
| 2030 | platform_device_unregister (&the_hcd_pdev); |
Russell King | 3ae5eae | 2005-11-09 22:32:44 +0000 | [diff] [blame] | 2031 | platform_driver_unregister (&dummy_udc_driver); |
| 2032 | platform_driver_unregister (&dummy_hcd_driver); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2033 | } |
| 2034 | module_exit (cleanup); |