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> |
David Brownell | 9454a57 | 2007-10-04 18:05:17 -0700 | [diff] [blame] | 49 | #include <linux/usb/gadget.h> |
Eric Lescouet | 27729aa | 2010-04-24 23:21:52 +0200 | [diff] [blame] | 50 | #include <linux/usb/hcd.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 51 | |
| 52 | #include <asm/byteorder.h> |
| 53 | #include <asm/io.h> |
| 54 | #include <asm/irq.h> |
| 55 | #include <asm/system.h> |
| 56 | #include <asm/unaligned.h> |
| 57 | |
| 58 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 59 | #define DRIVER_DESC "USB Host+Gadget Emulator" |
Alan Stern | 391eca9 | 2005-05-10 15:34:16 -0400 | [diff] [blame] | 60 | #define DRIVER_VERSION "02 May 2005" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 61 | |
Alan Stern | caf29f6 | 2007-12-06 11:10:39 -0500 | [diff] [blame] | 62 | #define POWER_BUDGET 500 /* in mA; use 8 for low-power port testing */ |
| 63 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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; |
Alan Stern | 851a526 | 2008-08-14 15:48:30 -0400 | [diff] [blame] | 83 | unsigned wedged : 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 84 | unsigned already_seen : 1; |
| 85 | unsigned setup_stage : 1; |
| 86 | }; |
| 87 | |
| 88 | struct dummy_request { |
| 89 | struct list_head queue; /* ep's requests */ |
| 90 | struct usb_request req; |
| 91 | }; |
| 92 | |
| 93 | static inline struct dummy_ep *usb_ep_to_dummy_ep (struct usb_ep *_ep) |
| 94 | { |
| 95 | return container_of (_ep, struct dummy_ep, ep); |
| 96 | } |
| 97 | |
| 98 | static inline struct dummy_request *usb_request_to_dummy_request |
| 99 | (struct usb_request *_req) |
| 100 | { |
| 101 | return container_of (_req, struct dummy_request, req); |
| 102 | } |
| 103 | |
| 104 | /*-------------------------------------------------------------------------*/ |
| 105 | |
| 106 | /* |
| 107 | * Every device has ep0 for control requests, plus up to 30 more endpoints, |
| 108 | * in one of two types: |
| 109 | * |
| 110 | * - Configurable: direction (in/out), type (bulk, iso, etc), and endpoint |
| 111 | * number can be changed. Names like "ep-a" are used for this type. |
| 112 | * |
| 113 | * - Fixed Function: in other cases. some characteristics may be mutable; |
| 114 | * that'd be hardware-specific. Names like "ep12out-bulk" are used. |
| 115 | * |
| 116 | * Gadget drivers are responsible for not setting up conflicting endpoint |
| 117 | * configurations, illegal or unsupported packet lengths, and so on. |
| 118 | */ |
| 119 | |
| 120 | static const char ep0name [] = "ep0"; |
| 121 | |
| 122 | static const char *const ep_name [] = { |
| 123 | ep0name, /* everyone has ep0 */ |
| 124 | |
| 125 | /* act like a net2280: high speed, six configurable endpoints */ |
| 126 | "ep-a", "ep-b", "ep-c", "ep-d", "ep-e", "ep-f", |
| 127 | |
| 128 | /* or like pxa250: fifteen fixed function endpoints */ |
| 129 | "ep1in-bulk", "ep2out-bulk", "ep3in-iso", "ep4out-iso", "ep5in-int", |
| 130 | "ep6in-bulk", "ep7out-bulk", "ep8in-iso", "ep9out-iso", "ep10in-int", |
| 131 | "ep11in-bulk", "ep12out-bulk", "ep13in-iso", "ep14out-iso", |
| 132 | "ep15in-int", |
| 133 | |
| 134 | /* or like sa1100: two fixed function endpoints */ |
| 135 | "ep1out-bulk", "ep2in-bulk", |
| 136 | }; |
Tobias Klauser | 52950ed | 2005-12-11 16:20:08 +0100 | [diff] [blame] | 137 | #define DUMMY_ENDPOINTS ARRAY_SIZE(ep_name) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 138 | |
Alan Stern | d9b7625 | 2005-05-03 16:15:43 -0400 | [diff] [blame] | 139 | /*-------------------------------------------------------------------------*/ |
| 140 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 141 | #define FIFO_SIZE 64 |
| 142 | |
| 143 | struct urbp { |
| 144 | struct urb *urb; |
| 145 | struct list_head urbp_list; |
| 146 | }; |
| 147 | |
Alan Stern | 391eca9 | 2005-05-10 15:34:16 -0400 | [diff] [blame] | 148 | |
| 149 | enum dummy_rh_state { |
| 150 | DUMMY_RH_RESET, |
| 151 | DUMMY_RH_SUSPENDED, |
| 152 | DUMMY_RH_RUNNING |
| 153 | }; |
| 154 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 155 | struct dummy { |
| 156 | spinlock_t lock; |
| 157 | |
| 158 | /* |
| 159 | * SLAVE/GADGET side support |
| 160 | */ |
| 161 | struct dummy_ep ep [DUMMY_ENDPOINTS]; |
| 162 | int address; |
| 163 | struct usb_gadget gadget; |
| 164 | struct usb_gadget_driver *driver; |
| 165 | struct dummy_request fifo_req; |
| 166 | u8 fifo_buf [FIFO_SIZE]; |
| 167 | u16 devstatus; |
Alan Stern | 391eca9 | 2005-05-10 15:34:16 -0400 | [diff] [blame] | 168 | unsigned udc_suspended:1; |
Alan Stern | f1c39fa | 2005-05-03 16:24:04 -0400 | [diff] [blame] | 169 | unsigned pullup:1; |
| 170 | unsigned active:1; |
| 171 | unsigned old_active:1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 172 | |
| 173 | /* |
| 174 | * MASTER/HOST side support |
| 175 | */ |
Alan Stern | 391eca9 | 2005-05-10 15:34:16 -0400 | [diff] [blame] | 176 | enum dummy_rh_state rh_state; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 177 | struct timer_list timer; |
| 178 | u32 port_status; |
Alan Stern | f1c39fa | 2005-05-03 16:24:04 -0400 | [diff] [blame] | 179 | u32 old_status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 180 | unsigned resuming:1; |
| 181 | unsigned long re_timeout; |
| 182 | |
| 183 | struct usb_device *udev; |
| 184 | struct list_head urbp_list; |
| 185 | }; |
| 186 | |
| 187 | static inline struct dummy *hcd_to_dummy (struct usb_hcd *hcd) |
| 188 | { |
| 189 | return (struct dummy *) (hcd->hcd_priv); |
| 190 | } |
| 191 | |
| 192 | static inline struct usb_hcd *dummy_to_hcd (struct dummy *dum) |
| 193 | { |
| 194 | return container_of((void *) dum, struct usb_hcd, hcd_priv); |
| 195 | } |
| 196 | |
| 197 | static inline struct device *dummy_dev (struct dummy *dum) |
| 198 | { |
| 199 | return dummy_to_hcd(dum)->self.controller; |
| 200 | } |
| 201 | |
Alan Stern | d9b7625 | 2005-05-03 16:15:43 -0400 | [diff] [blame] | 202 | static inline struct device *udc_dev (struct dummy *dum) |
| 203 | { |
| 204 | return dum->gadget.dev.parent; |
| 205 | } |
| 206 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 207 | static inline struct dummy *ep_to_dummy (struct dummy_ep *ep) |
| 208 | { |
| 209 | return container_of (ep->gadget, struct dummy, gadget); |
| 210 | } |
| 211 | |
| 212 | static inline struct dummy *gadget_to_dummy (struct usb_gadget *gadget) |
| 213 | { |
| 214 | return container_of (gadget, struct dummy, gadget); |
| 215 | } |
| 216 | |
| 217 | static inline struct dummy *gadget_dev_to_dummy (struct device *dev) |
| 218 | { |
| 219 | return container_of (dev, struct dummy, gadget.dev); |
| 220 | } |
| 221 | |
| 222 | static struct dummy *the_controller; |
| 223 | |
| 224 | /*-------------------------------------------------------------------------*/ |
| 225 | |
Alan Stern | f1c39fa | 2005-05-03 16:24:04 -0400 | [diff] [blame] | 226 | /* SLAVE/GADGET SIDE UTILITY ROUTINES */ |
| 227 | |
| 228 | /* called with spinlock held */ |
| 229 | static void nuke (struct dummy *dum, struct dummy_ep *ep) |
| 230 | { |
| 231 | while (!list_empty (&ep->queue)) { |
| 232 | struct dummy_request *req; |
| 233 | |
| 234 | req = list_entry (ep->queue.next, struct dummy_request, queue); |
| 235 | list_del_init (&req->queue); |
| 236 | req->req.status = -ESHUTDOWN; |
| 237 | |
| 238 | spin_unlock (&dum->lock); |
| 239 | req->req.complete (&ep->ep, &req->req); |
| 240 | spin_lock (&dum->lock); |
| 241 | } |
| 242 | } |
| 243 | |
| 244 | /* caller must hold lock */ |
| 245 | static void |
| 246 | stop_activity (struct dummy *dum) |
| 247 | { |
| 248 | struct dummy_ep *ep; |
| 249 | |
| 250 | /* prevent any more requests */ |
| 251 | dum->address = 0; |
| 252 | |
| 253 | /* The timer is left running so that outstanding URBs can fail */ |
| 254 | |
| 255 | /* nuke any pending requests first, so driver i/o is quiesced */ |
| 256 | list_for_each_entry (ep, &dum->gadget.ep_list, ep.ep_list) |
| 257 | nuke (dum, ep); |
| 258 | |
| 259 | /* driver now does any non-usb quiescing necessary */ |
| 260 | } |
| 261 | |
| 262 | /* caller must hold lock */ |
| 263 | static void |
| 264 | set_link_state (struct dummy *dum) |
| 265 | { |
| 266 | dum->active = 0; |
| 267 | if ((dum->port_status & USB_PORT_STAT_POWER) == 0) |
| 268 | dum->port_status = 0; |
Alan Stern | 391eca9 | 2005-05-10 15:34:16 -0400 | [diff] [blame] | 269 | |
| 270 | /* UDC suspend must cause a disconnect */ |
| 271 | else if (!dum->pullup || dum->udc_suspended) { |
Alan Stern | f1c39fa | 2005-05-03 16:24:04 -0400 | [diff] [blame] | 272 | dum->port_status &= ~(USB_PORT_STAT_CONNECTION | |
| 273 | USB_PORT_STAT_ENABLE | |
| 274 | USB_PORT_STAT_LOW_SPEED | |
| 275 | USB_PORT_STAT_HIGH_SPEED | |
| 276 | USB_PORT_STAT_SUSPEND); |
| 277 | if ((dum->old_status & USB_PORT_STAT_CONNECTION) != 0) |
| 278 | dum->port_status |= (USB_PORT_STAT_C_CONNECTION << 16); |
| 279 | } else { |
| 280 | dum->port_status |= USB_PORT_STAT_CONNECTION; |
| 281 | if ((dum->old_status & USB_PORT_STAT_CONNECTION) == 0) |
| 282 | dum->port_status |= (USB_PORT_STAT_C_CONNECTION << 16); |
| 283 | if ((dum->port_status & USB_PORT_STAT_ENABLE) == 0) |
| 284 | dum->port_status &= ~USB_PORT_STAT_SUSPEND; |
Alan Stern | 391eca9 | 2005-05-10 15:34:16 -0400 | [diff] [blame] | 285 | else if ((dum->port_status & USB_PORT_STAT_SUSPEND) == 0 && |
| 286 | dum->rh_state != DUMMY_RH_SUSPENDED) |
Alan Stern | f1c39fa | 2005-05-03 16:24:04 -0400 | [diff] [blame] | 287 | dum->active = 1; |
| 288 | } |
| 289 | |
| 290 | if ((dum->port_status & USB_PORT_STAT_ENABLE) == 0 || dum->active) |
| 291 | dum->resuming = 0; |
| 292 | |
| 293 | if ((dum->port_status & USB_PORT_STAT_CONNECTION) == 0 || |
| 294 | (dum->port_status & USB_PORT_STAT_RESET) != 0) { |
| 295 | if ((dum->old_status & USB_PORT_STAT_CONNECTION) != 0 && |
| 296 | (dum->old_status & USB_PORT_STAT_RESET) == 0 && |
| 297 | dum->driver) { |
| 298 | stop_activity (dum); |
| 299 | spin_unlock (&dum->lock); |
| 300 | dum->driver->disconnect (&dum->gadget); |
| 301 | spin_lock (&dum->lock); |
| 302 | } |
| 303 | } else if (dum->active != dum->old_active) { |
| 304 | if (dum->old_active && dum->driver->suspend) { |
| 305 | spin_unlock (&dum->lock); |
| 306 | dum->driver->suspend (&dum->gadget); |
| 307 | spin_lock (&dum->lock); |
| 308 | } else if (!dum->old_active && dum->driver->resume) { |
| 309 | spin_unlock (&dum->lock); |
| 310 | dum->driver->resume (&dum->gadget); |
| 311 | spin_lock (&dum->lock); |
| 312 | } |
| 313 | } |
| 314 | |
| 315 | dum->old_status = dum->port_status; |
| 316 | dum->old_active = dum->active; |
| 317 | } |
| 318 | |
| 319 | /*-------------------------------------------------------------------------*/ |
| 320 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 321 | /* SLAVE/GADGET SIDE DRIVER |
| 322 | * |
| 323 | * This only tracks gadget state. All the work is done when the host |
| 324 | * side tries some (emulated) i/o operation. Real device controller |
| 325 | * drivers would do real i/o using dma, fifos, irqs, timers, etc. |
| 326 | */ |
| 327 | |
| 328 | #define is_enabled(dum) \ |
| 329 | (dum->port_status & USB_PORT_STAT_ENABLE) |
| 330 | |
| 331 | static int |
| 332 | dummy_enable (struct usb_ep *_ep, const struct usb_endpoint_descriptor *desc) |
| 333 | { |
| 334 | struct dummy *dum; |
| 335 | struct dummy_ep *ep; |
| 336 | unsigned max; |
| 337 | int retval; |
| 338 | |
| 339 | ep = usb_ep_to_dummy_ep (_ep); |
| 340 | if (!_ep || !desc || ep->desc || _ep->name == ep0name |
| 341 | || desc->bDescriptorType != USB_DT_ENDPOINT) |
| 342 | return -EINVAL; |
| 343 | dum = ep_to_dummy (ep); |
| 344 | if (!dum->driver || !is_enabled (dum)) |
| 345 | return -ESHUTDOWN; |
| 346 | max = le16_to_cpu(desc->wMaxPacketSize) & 0x3ff; |
| 347 | |
| 348 | /* drivers must not request bad settings, since lower levels |
| 349 | * (hardware or its drivers) may not check. some endpoints |
| 350 | * can't do iso, many have maxpacket limitations, etc. |
| 351 | * |
| 352 | * since this "hardware" driver is here to help debugging, we |
| 353 | * have some extra sanity checks. (there could be more though, |
| 354 | * especially for "ep9out" style fixed function ones.) |
| 355 | */ |
| 356 | retval = -EINVAL; |
| 357 | switch (desc->bmAttributes & 0x03) { |
| 358 | case USB_ENDPOINT_XFER_BULK: |
| 359 | if (strstr (ep->ep.name, "-iso") |
| 360 | || strstr (ep->ep.name, "-int")) { |
| 361 | goto done; |
| 362 | } |
| 363 | switch (dum->gadget.speed) { |
| 364 | case USB_SPEED_HIGH: |
| 365 | if (max == 512) |
| 366 | break; |
Ingo van Lil | 9063ff4 | 2008-03-28 14:50:26 -0700 | [diff] [blame] | 367 | goto done; |
| 368 | case USB_SPEED_FULL: |
| 369 | if (max == 8 || max == 16 || max == 32 || max == 64) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 370 | /* we'll fake any legal size */ |
| 371 | break; |
Ingo van Lil | 9063ff4 | 2008-03-28 14:50:26 -0700 | [diff] [blame] | 372 | /* save a return statement */ |
| 373 | default: |
| 374 | goto done; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 375 | } |
| 376 | break; |
| 377 | case USB_ENDPOINT_XFER_INT: |
| 378 | if (strstr (ep->ep.name, "-iso")) /* bulk is ok */ |
| 379 | goto done; |
| 380 | /* real hardware might not handle all packet sizes */ |
| 381 | switch (dum->gadget.speed) { |
| 382 | case USB_SPEED_HIGH: |
| 383 | if (max <= 1024) |
| 384 | break; |
| 385 | /* save a return statement */ |
| 386 | case USB_SPEED_FULL: |
| 387 | if (max <= 64) |
| 388 | break; |
| 389 | /* save a return statement */ |
| 390 | default: |
| 391 | if (max <= 8) |
| 392 | break; |
| 393 | goto done; |
| 394 | } |
| 395 | break; |
| 396 | case USB_ENDPOINT_XFER_ISOC: |
| 397 | if (strstr (ep->ep.name, "-bulk") |
| 398 | || strstr (ep->ep.name, "-int")) |
| 399 | goto done; |
| 400 | /* real hardware might not handle all packet sizes */ |
| 401 | switch (dum->gadget.speed) { |
| 402 | case USB_SPEED_HIGH: |
| 403 | if (max <= 1024) |
| 404 | break; |
| 405 | /* save a return statement */ |
| 406 | case USB_SPEED_FULL: |
| 407 | if (max <= 1023) |
| 408 | break; |
| 409 | /* save a return statement */ |
| 410 | default: |
| 411 | goto done; |
| 412 | } |
| 413 | break; |
| 414 | default: |
| 415 | /* few chips support control except on ep0 */ |
| 416 | goto done; |
| 417 | } |
| 418 | |
| 419 | _ep->maxpacket = max; |
| 420 | ep->desc = desc; |
| 421 | |
Alan Stern | d9b7625 | 2005-05-03 16:15:43 -0400 | [diff] [blame] | 422 | 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] | 423 | _ep->name, |
| 424 | desc->bEndpointAddress & 0x0f, |
| 425 | (desc->bEndpointAddress & USB_DIR_IN) ? "in" : "out", |
| 426 | ({ char *val; |
| 427 | switch (desc->bmAttributes & 0x03) { |
| 428 | case USB_ENDPOINT_XFER_BULK: val = "bulk"; break; |
| 429 | case USB_ENDPOINT_XFER_ISOC: val = "iso"; break; |
| 430 | case USB_ENDPOINT_XFER_INT: val = "intr"; break; |
| 431 | default: val = "ctrl"; break; |
| 432 | }; val; }), |
| 433 | max); |
| 434 | |
| 435 | /* at this point real hardware should be NAKing transfers |
| 436 | * to that endpoint, until a buffer is queued to it. |
| 437 | */ |
Alan Stern | 851a526 | 2008-08-14 15:48:30 -0400 | [diff] [blame] | 438 | ep->halted = ep->wedged = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | |
David Brownell | c728df7 | 2008-07-26 08:06:24 -0700 | [diff] [blame] | 545 | list_add_tail(&req->queue, &ep->queue); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 546 | spin_unlock (&dum->lock); |
| 547 | _req->actual = _req->length; |
| 548 | _req->status = 0; |
| 549 | _req->complete (_ep, _req); |
| 550 | spin_lock (&dum->lock); |
David Brownell | c728df7 | 2008-07-26 08:06:24 -0700 | [diff] [blame] | 551 | } else |
| 552 | list_add_tail(&req->queue, &ep->queue); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 553 | spin_unlock_irqrestore (&dum->lock, flags); |
| 554 | |
| 555 | /* real hardware would likely enable transfers here, in case |
| 556 | * it'd been left NAKing. |
| 557 | */ |
| 558 | return 0; |
| 559 | } |
| 560 | |
| 561 | static int dummy_dequeue (struct usb_ep *_ep, struct usb_request *_req) |
| 562 | { |
| 563 | struct dummy_ep *ep; |
| 564 | struct dummy *dum; |
| 565 | int retval = -EINVAL; |
| 566 | unsigned long flags; |
| 567 | struct dummy_request *req = NULL; |
| 568 | |
| 569 | if (!_ep || !_req) |
| 570 | return retval; |
| 571 | ep = usb_ep_to_dummy_ep (_ep); |
| 572 | dum = ep_to_dummy (ep); |
| 573 | |
| 574 | if (!dum->driver) |
| 575 | return -ESHUTDOWN; |
| 576 | |
Alan Stern | b4dbda1 | 2006-07-28 17:07:34 -0400 | [diff] [blame] | 577 | local_irq_save (flags); |
| 578 | spin_lock (&dum->lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 579 | list_for_each_entry (req, &ep->queue, queue) { |
| 580 | if (&req->req == _req) { |
| 581 | list_del_init (&req->queue); |
| 582 | _req->status = -ECONNRESET; |
| 583 | retval = 0; |
| 584 | break; |
| 585 | } |
| 586 | } |
Alan Stern | b4dbda1 | 2006-07-28 17:07:34 -0400 | [diff] [blame] | 587 | spin_unlock (&dum->lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 588 | |
| 589 | if (retval == 0) { |
Alan Stern | d9b7625 | 2005-05-03 16:15:43 -0400 | [diff] [blame] | 590 | dev_dbg (udc_dev(dum), |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 591 | "dequeued req %p from %s, len %d buf %p\n", |
| 592 | req, _ep->name, _req->length, _req->buf); |
| 593 | _req->complete (_ep, _req); |
| 594 | } |
Alan Stern | b4dbda1 | 2006-07-28 17:07:34 -0400 | [diff] [blame] | 595 | local_irq_restore (flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 596 | return retval; |
| 597 | } |
| 598 | |
| 599 | static int |
Alan Stern | 851a526 | 2008-08-14 15:48:30 -0400 | [diff] [blame] | 600 | dummy_set_halt_and_wedge(struct usb_ep *_ep, int value, int wedged) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 601 | { |
| 602 | struct dummy_ep *ep; |
| 603 | struct dummy *dum; |
| 604 | |
| 605 | if (!_ep) |
| 606 | return -EINVAL; |
| 607 | ep = usb_ep_to_dummy_ep (_ep); |
| 608 | dum = ep_to_dummy (ep); |
| 609 | if (!dum->driver) |
| 610 | return -ESHUTDOWN; |
| 611 | if (!value) |
Alan Stern | 851a526 | 2008-08-14 15:48:30 -0400 | [diff] [blame] | 612 | ep->halted = ep->wedged = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 613 | else if (ep->desc && (ep->desc->bEndpointAddress & USB_DIR_IN) && |
| 614 | !list_empty (&ep->queue)) |
| 615 | return -EAGAIN; |
Alan Stern | 851a526 | 2008-08-14 15:48:30 -0400 | [diff] [blame] | 616 | else { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 617 | ep->halted = 1; |
Alan Stern | 851a526 | 2008-08-14 15:48:30 -0400 | [diff] [blame] | 618 | if (wedged) |
| 619 | ep->wedged = 1; |
| 620 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 621 | /* FIXME clear emulated data toggle too */ |
| 622 | return 0; |
| 623 | } |
| 624 | |
Alan Stern | 851a526 | 2008-08-14 15:48:30 -0400 | [diff] [blame] | 625 | static int |
| 626 | dummy_set_halt(struct usb_ep *_ep, int value) |
| 627 | { |
| 628 | return dummy_set_halt_and_wedge(_ep, value, 0); |
| 629 | } |
| 630 | |
| 631 | static int dummy_set_wedge(struct usb_ep *_ep) |
| 632 | { |
| 633 | if (!_ep || _ep->name == ep0name) |
| 634 | return -EINVAL; |
| 635 | return dummy_set_halt_and_wedge(_ep, 1, 1); |
| 636 | } |
| 637 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 638 | static const struct usb_ep_ops dummy_ep_ops = { |
| 639 | .enable = dummy_enable, |
| 640 | .disable = dummy_disable, |
| 641 | |
| 642 | .alloc_request = dummy_alloc_request, |
| 643 | .free_request = dummy_free_request, |
| 644 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 645 | .queue = dummy_queue, |
| 646 | .dequeue = dummy_dequeue, |
| 647 | |
| 648 | .set_halt = dummy_set_halt, |
Alan Stern | 851a526 | 2008-08-14 15:48:30 -0400 | [diff] [blame] | 649 | .set_wedge = dummy_set_wedge, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 650 | }; |
| 651 | |
| 652 | /*-------------------------------------------------------------------------*/ |
| 653 | |
| 654 | /* there are both host and device side versions of this call ... */ |
| 655 | static int dummy_g_get_frame (struct usb_gadget *_gadget) |
| 656 | { |
| 657 | struct timeval tv; |
| 658 | |
| 659 | do_gettimeofday (&tv); |
| 660 | return tv.tv_usec / 1000; |
| 661 | } |
| 662 | |
| 663 | static int dummy_wakeup (struct usb_gadget *_gadget) |
| 664 | { |
| 665 | struct dummy *dum; |
| 666 | |
| 667 | dum = gadget_to_dummy (_gadget); |
Alan Stern | 391eca9 | 2005-05-10 15:34:16 -0400 | [diff] [blame] | 668 | if (!(dum->devstatus & ( (1 << USB_DEVICE_B_HNP_ENABLE) |
Alan Stern | 5742b0c | 2005-05-02 11:25:17 -0400 | [diff] [blame] | 669 | | (1 << USB_DEVICE_REMOTE_WAKEUP)))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 670 | return -EINVAL; |
Alan Stern | 391eca9 | 2005-05-10 15:34:16 -0400 | [diff] [blame] | 671 | if ((dum->port_status & USB_PORT_STAT_CONNECTION) == 0) |
| 672 | return -ENOLINK; |
| 673 | if ((dum->port_status & USB_PORT_STAT_SUSPEND) == 0 && |
| 674 | dum->rh_state != DUMMY_RH_SUSPENDED) |
| 675 | return -EIO; |
| 676 | |
| 677 | /* 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] | 678 | |
| 679 | /* hub notices our request, issues downstream resume, etc */ |
| 680 | dum->resuming = 1; |
Alan Stern | f1c39fa | 2005-05-03 16:24:04 -0400 | [diff] [blame] | 681 | dum->re_timeout = jiffies + msecs_to_jiffies(20); |
Alan Stern | 685eb93 | 2005-05-03 16:27:26 -0400 | [diff] [blame] | 682 | mod_timer (&dummy_to_hcd (dum)->rh_timer, dum->re_timeout); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 683 | return 0; |
| 684 | } |
| 685 | |
| 686 | static int dummy_set_selfpowered (struct usb_gadget *_gadget, int value) |
| 687 | { |
| 688 | struct dummy *dum; |
| 689 | |
| 690 | dum = gadget_to_dummy (_gadget); |
| 691 | if (value) |
| 692 | dum->devstatus |= (1 << USB_DEVICE_SELF_POWERED); |
| 693 | else |
| 694 | dum->devstatus &= ~(1 << USB_DEVICE_SELF_POWERED); |
| 695 | return 0; |
| 696 | } |
| 697 | |
Alan Stern | f1c39fa | 2005-05-03 16:24:04 -0400 | [diff] [blame] | 698 | static int dummy_pullup (struct usb_gadget *_gadget, int value) |
| 699 | { |
| 700 | struct dummy *dum; |
| 701 | unsigned long flags; |
| 702 | |
| 703 | dum = gadget_to_dummy (_gadget); |
| 704 | spin_lock_irqsave (&dum->lock, flags); |
| 705 | dum->pullup = (value != 0); |
| 706 | set_link_state (dum); |
| 707 | spin_unlock_irqrestore (&dum->lock, flags); |
Alan Stern | 685eb93 | 2005-05-03 16:27:26 -0400 | [diff] [blame] | 708 | |
| 709 | usb_hcd_poll_rh_status (dummy_to_hcd (dum)); |
Alan Stern | f1c39fa | 2005-05-03 16:24:04 -0400 | [diff] [blame] | 710 | return 0; |
| 711 | } |
| 712 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 713 | static const struct usb_gadget_ops dummy_ops = { |
| 714 | .get_frame = dummy_g_get_frame, |
| 715 | .wakeup = dummy_wakeup, |
| 716 | .set_selfpowered = dummy_set_selfpowered, |
Alan Stern | f1c39fa | 2005-05-03 16:24:04 -0400 | [diff] [blame] | 717 | .pullup = dummy_pullup, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 718 | }; |
| 719 | |
| 720 | /*-------------------------------------------------------------------------*/ |
| 721 | |
| 722 | /* "function" sysfs attribute */ |
| 723 | static ssize_t |
Yani Ioannou | 10523b3 | 2005-05-17 06:43:37 -0400 | [diff] [blame] | 724 | show_function (struct device *dev, struct device_attribute *attr, char *buf) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 725 | { |
| 726 | struct dummy *dum = gadget_dev_to_dummy (dev); |
| 727 | |
| 728 | if (!dum->driver || !dum->driver->function) |
| 729 | return 0; |
| 730 | return scnprintf (buf, PAGE_SIZE, "%s\n", dum->driver->function); |
| 731 | } |
Alan Stern | cc095b0 | 2005-05-10 15:28:38 -0400 | [diff] [blame] | 732 | static DEVICE_ATTR (function, S_IRUGO, show_function, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 733 | |
| 734 | /*-------------------------------------------------------------------------*/ |
| 735 | |
| 736 | /* |
| 737 | * Driver registration/unregistration. |
| 738 | * |
| 739 | * This is basically hardware-specific; there's usually only one real USB |
| 740 | * device (not host) controller since that's how USB devices are intended |
| 741 | * to work. So most implementations of these api calls will rely on the |
| 742 | * fact that only one driver will ever bind to the hardware. But curious |
| 743 | * hardware can be built with discrete components, so the gadget API doesn't |
| 744 | * require that assumption. |
| 745 | * |
| 746 | * For this emulator, it might be convenient to create a usb slave device |
| 747 | * for each driver that registers: just add to a big root hub. |
| 748 | */ |
| 749 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 750 | int |
Uwe Kleine-König | b0fca50 | 2010-08-12 17:43:53 +0200 | [diff] [blame] | 751 | usb_gadget_probe_driver(struct usb_gadget_driver *driver, |
| 752 | int (*bind)(struct usb_gadget *)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 753 | { |
| 754 | struct dummy *dum = the_controller; |
| 755 | int retval, i; |
| 756 | |
| 757 | if (!dum) |
| 758 | return -EINVAL; |
| 759 | if (dum->driver) |
| 760 | return -EBUSY; |
Uwe Kleine-König | b0fca50 | 2010-08-12 17:43:53 +0200 | [diff] [blame] | 761 | if (!bind || !driver->setup || driver->speed == USB_SPEED_UNKNOWN) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 762 | return -EINVAL; |
| 763 | |
| 764 | /* |
| 765 | * SLAVE side init ... the layer above hardware, which |
| 766 | * can't enumerate without help from the driver we're binding. |
| 767 | */ |
Alan Stern | 5742b0c | 2005-05-02 11:25:17 -0400 | [diff] [blame] | 768 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 769 | dum->devstatus = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 770 | |
| 771 | INIT_LIST_HEAD (&dum->gadget.ep_list); |
| 772 | for (i = 0; i < DUMMY_ENDPOINTS; i++) { |
| 773 | struct dummy_ep *ep = &dum->ep [i]; |
| 774 | |
| 775 | if (!ep_name [i]) |
| 776 | break; |
| 777 | ep->ep.name = ep_name [i]; |
| 778 | ep->ep.ops = &dummy_ep_ops; |
| 779 | list_add_tail (&ep->ep.ep_list, &dum->gadget.ep_list); |
Alan Stern | 851a526 | 2008-08-14 15:48:30 -0400 | [diff] [blame] | 780 | ep->halted = ep->wedged = ep->already_seen = |
| 781 | ep->setup_stage = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 782 | ep->ep.maxpacket = ~0; |
| 783 | ep->last_io = jiffies; |
| 784 | ep->gadget = &dum->gadget; |
| 785 | ep->desc = NULL; |
| 786 | INIT_LIST_HEAD (&ep->queue); |
| 787 | } |
| 788 | |
| 789 | dum->gadget.ep0 = &dum->ep [0].ep; |
| 790 | dum->ep [0].ep.maxpacket = 64; |
| 791 | list_del_init (&dum->ep [0].ep.ep_list); |
| 792 | INIT_LIST_HEAD(&dum->fifo_req.queue); |
| 793 | |
Alan Stern | 5933101 | 2007-11-20 16:28:55 -0500 | [diff] [blame] | 794 | driver->driver.bus = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 795 | dum->driver = driver; |
| 796 | dum->gadget.dev.driver = &driver->driver; |
Alan Stern | d9b7625 | 2005-05-03 16:15:43 -0400 | [diff] [blame] | 797 | dev_dbg (udc_dev(dum), "binding gadget driver '%s'\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 798 | driver->driver.name); |
Uwe Kleine-König | b0fca50 | 2010-08-12 17:43:53 +0200 | [diff] [blame] | 799 | retval = bind(&dum->gadget); |
Alan Stern | 5933101 | 2007-11-20 16:28:55 -0500 | [diff] [blame] | 800 | if (retval) { |
| 801 | dum->driver = NULL; |
| 802 | dum->gadget.dev.driver = NULL; |
| 803 | return retval; |
| 804 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 805 | |
| 806 | /* khubd will enumerate this in a while */ |
Alan Stern | f1c39fa | 2005-05-03 16:24:04 -0400 | [diff] [blame] | 807 | spin_lock_irq (&dum->lock); |
| 808 | dum->pullup = 1; |
| 809 | set_link_state (dum); |
| 810 | spin_unlock_irq (&dum->lock); |
Alan Stern | 685eb93 | 2005-05-03 16:27:26 -0400 | [diff] [blame] | 811 | |
| 812 | usb_hcd_poll_rh_status (dummy_to_hcd (dum)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 813 | return 0; |
| 814 | } |
Uwe Kleine-König | b0fca50 | 2010-08-12 17:43:53 +0200 | [diff] [blame] | 815 | EXPORT_SYMBOL(usb_gadget_probe_driver); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 816 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 817 | int |
| 818 | usb_gadget_unregister_driver (struct usb_gadget_driver *driver) |
| 819 | { |
| 820 | struct dummy *dum = the_controller; |
| 821 | unsigned long flags; |
| 822 | |
| 823 | if (!dum) |
| 824 | return -ENODEV; |
David Brownell | 6bea476 | 2006-12-05 03:15:33 -0800 | [diff] [blame] | 825 | if (!driver || driver != dum->driver || !driver->unbind) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 826 | return -EINVAL; |
| 827 | |
Alan Stern | d9b7625 | 2005-05-03 16:15:43 -0400 | [diff] [blame] | 828 | dev_dbg (udc_dev(dum), "unregister gadget driver '%s'\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 829 | driver->driver.name); |
| 830 | |
| 831 | spin_lock_irqsave (&dum->lock, flags); |
Alan Stern | f1c39fa | 2005-05-03 16:24:04 -0400 | [diff] [blame] | 832 | dum->pullup = 0; |
| 833 | set_link_state (dum); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 834 | spin_unlock_irqrestore (&dum->lock, flags); |
| 835 | |
| 836 | driver->unbind (&dum->gadget); |
Alan Stern | 5933101 | 2007-11-20 16:28:55 -0500 | [diff] [blame] | 837 | dum->gadget.dev.driver = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 838 | dum->driver = NULL; |
| 839 | |
Alan Stern | f1c39fa | 2005-05-03 16:24:04 -0400 | [diff] [blame] | 840 | spin_lock_irqsave (&dum->lock, flags); |
| 841 | dum->pullup = 0; |
| 842 | set_link_state (dum); |
| 843 | spin_unlock_irqrestore (&dum->lock, flags); |
| 844 | |
Alan Stern | 685eb93 | 2005-05-03 16:27:26 -0400 | [diff] [blame] | 845 | usb_hcd_poll_rh_status (dummy_to_hcd (dum)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 846 | return 0; |
| 847 | } |
| 848 | EXPORT_SYMBOL (usb_gadget_unregister_driver); |
| 849 | |
| 850 | #undef is_enabled |
| 851 | |
Alan Stern | cc095b0 | 2005-05-10 15:28:38 -0400 | [diff] [blame] | 852 | /* just declare this in any driver that really need it */ |
| 853 | extern int net2280_set_fifo_mode (struct usb_gadget *gadget, int mode); |
| 854 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 855 | int net2280_set_fifo_mode (struct usb_gadget *gadget, int mode) |
| 856 | { |
| 857 | return -ENOSYS; |
| 858 | } |
| 859 | EXPORT_SYMBOL (net2280_set_fifo_mode); |
| 860 | |
Alan Stern | d9b7625 | 2005-05-03 16:15:43 -0400 | [diff] [blame] | 861 | |
| 862 | /* The gadget structure is stored inside the hcd structure and will be |
| 863 | * released along with it. */ |
| 864 | static void |
| 865 | dummy_gadget_release (struct device *dev) |
| 866 | { |
Alan Stern | d9b7625 | 2005-05-03 16:15:43 -0400 | [diff] [blame] | 867 | struct dummy *dum = gadget_dev_to_dummy (dev); |
| 868 | |
Alan Stern | 1720058 | 2006-08-30 11:32:52 -0400 | [diff] [blame] | 869 | usb_put_hcd (dummy_to_hcd (dum)); |
Alan Stern | d9b7625 | 2005-05-03 16:15:43 -0400 | [diff] [blame] | 870 | } |
| 871 | |
Alan Stern | 8364d6b | 2005-11-14 12:16:30 -0500 | [diff] [blame] | 872 | static int dummy_udc_probe (struct platform_device *pdev) |
Alan Stern | d9b7625 | 2005-05-03 16:15:43 -0400 | [diff] [blame] | 873 | { |
| 874 | struct dummy *dum = the_controller; |
| 875 | int rc; |
| 876 | |
Rahul Ruikar | 75d87cd | 2010-10-07 09:40:45 +0530 | [diff] [blame] | 877 | usb_get_hcd(dummy_to_hcd(dum)); |
| 878 | |
Alan Stern | d9b7625 | 2005-05-03 16:15:43 -0400 | [diff] [blame] | 879 | dum->gadget.name = gadget_name; |
| 880 | dum->gadget.ops = &dummy_ops; |
| 881 | dum->gadget.is_dualspeed = 1; |
| 882 | |
| 883 | /* maybe claim OTG support, though we won't complete HNP */ |
| 884 | dum->gadget.is_otg = (dummy_to_hcd(dum)->self.otg_port != 0); |
| 885 | |
Kay Sievers | 0031a06 | 2008-05-02 06:02:41 +0200 | [diff] [blame] | 886 | dev_set_name(&dum->gadget.dev, "gadget"); |
Alan Stern | 8364d6b | 2005-11-14 12:16:30 -0500 | [diff] [blame] | 887 | dum->gadget.dev.parent = &pdev->dev; |
Alan Stern | d9b7625 | 2005-05-03 16:15:43 -0400 | [diff] [blame] | 888 | dum->gadget.dev.release = dummy_gadget_release; |
| 889 | rc = device_register (&dum->gadget.dev); |
Rahul Ruikar | 75d87cd | 2010-10-07 09:40:45 +0530 | [diff] [blame] | 890 | if (rc < 0) { |
| 891 | put_device(&dum->gadget.dev); |
Alan Stern | d9b7625 | 2005-05-03 16:15:43 -0400 | [diff] [blame] | 892 | return rc; |
Rahul Ruikar | 75d87cd | 2010-10-07 09:40:45 +0530 | [diff] [blame] | 893 | } |
Alan Stern | d9b7625 | 2005-05-03 16:15:43 -0400 | [diff] [blame] | 894 | |
Alan Stern | 8364d6b | 2005-11-14 12:16:30 -0500 | [diff] [blame] | 895 | platform_set_drvdata (pdev, dum); |
Alan Stern | efd54a3 | 2006-09-25 11:55:56 -0400 | [diff] [blame] | 896 | rc = device_create_file (&dum->gadget.dev, &dev_attr_function); |
| 897 | if (rc < 0) |
| 898 | device_unregister (&dum->gadget.dev); |
Alan Stern | d9b7625 | 2005-05-03 16:15:43 -0400 | [diff] [blame] | 899 | return rc; |
| 900 | } |
| 901 | |
Alan Stern | 8364d6b | 2005-11-14 12:16:30 -0500 | [diff] [blame] | 902 | static int dummy_udc_remove (struct platform_device *pdev) |
Alan Stern | d9b7625 | 2005-05-03 16:15:43 -0400 | [diff] [blame] | 903 | { |
Alan Stern | 8364d6b | 2005-11-14 12:16:30 -0500 | [diff] [blame] | 904 | struct dummy *dum = platform_get_drvdata (pdev); |
Alan Stern | d9b7625 | 2005-05-03 16:15:43 -0400 | [diff] [blame] | 905 | |
Alan Stern | 8364d6b | 2005-11-14 12:16:30 -0500 | [diff] [blame] | 906 | platform_set_drvdata (pdev, NULL); |
Alan Stern | d9b7625 | 2005-05-03 16:15:43 -0400 | [diff] [blame] | 907 | device_remove_file (&dum->gadget.dev, &dev_attr_function); |
| 908 | device_unregister (&dum->gadget.dev); |
| 909 | return 0; |
| 910 | } |
| 911 | |
Alan Stern | 8364d6b | 2005-11-14 12:16:30 -0500 | [diff] [blame] | 912 | 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] | 913 | { |
Alan Stern | 8364d6b | 2005-11-14 12:16:30 -0500 | [diff] [blame] | 914 | struct dummy *dum = platform_get_drvdata(pdev); |
Alan Stern | 391eca9 | 2005-05-10 15:34:16 -0400 | [diff] [blame] | 915 | |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 916 | dev_dbg (&pdev->dev, "%s\n", __func__); |
Alan Stern | 391eca9 | 2005-05-10 15:34:16 -0400 | [diff] [blame] | 917 | spin_lock_irq (&dum->lock); |
| 918 | dum->udc_suspended = 1; |
| 919 | set_link_state (dum); |
| 920 | spin_unlock_irq (&dum->lock); |
| 921 | |
Alan Stern | 391eca9 | 2005-05-10 15:34:16 -0400 | [diff] [blame] | 922 | usb_hcd_poll_rh_status (dummy_to_hcd (dum)); |
| 923 | return 0; |
| 924 | } |
| 925 | |
Alan Stern | 8364d6b | 2005-11-14 12:16:30 -0500 | [diff] [blame] | 926 | static int dummy_udc_resume (struct platform_device *pdev) |
Alan Stern | 391eca9 | 2005-05-10 15:34:16 -0400 | [diff] [blame] | 927 | { |
Alan Stern | 8364d6b | 2005-11-14 12:16:30 -0500 | [diff] [blame] | 928 | struct dummy *dum = platform_get_drvdata(pdev); |
Alan Stern | 391eca9 | 2005-05-10 15:34:16 -0400 | [diff] [blame] | 929 | |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 930 | dev_dbg (&pdev->dev, "%s\n", __func__); |
Alan Stern | 391eca9 | 2005-05-10 15:34:16 -0400 | [diff] [blame] | 931 | spin_lock_irq (&dum->lock); |
| 932 | dum->udc_suspended = 0; |
| 933 | set_link_state (dum); |
| 934 | spin_unlock_irq (&dum->lock); |
| 935 | |
Alan Stern | 391eca9 | 2005-05-10 15:34:16 -0400 | [diff] [blame] | 936 | usb_hcd_poll_rh_status (dummy_to_hcd (dum)); |
| 937 | return 0; |
| 938 | } |
| 939 | |
Russell King | 3ae5eae | 2005-11-09 22:32:44 +0000 | [diff] [blame] | 940 | static struct platform_driver dummy_udc_driver = { |
Alan Stern | d9b7625 | 2005-05-03 16:15:43 -0400 | [diff] [blame] | 941 | .probe = dummy_udc_probe, |
| 942 | .remove = dummy_udc_remove, |
Alan Stern | 391eca9 | 2005-05-10 15:34:16 -0400 | [diff] [blame] | 943 | .suspend = dummy_udc_suspend, |
| 944 | .resume = dummy_udc_resume, |
Russell King | 3ae5eae | 2005-11-09 22:32:44 +0000 | [diff] [blame] | 945 | .driver = { |
| 946 | .name = (char *) gadget_name, |
| 947 | .owner = THIS_MODULE, |
| 948 | }, |
Alan Stern | d9b7625 | 2005-05-03 16:15:43 -0400 | [diff] [blame] | 949 | }; |
| 950 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 951 | /*-------------------------------------------------------------------------*/ |
| 952 | |
| 953 | /* MASTER/HOST SIDE DRIVER |
| 954 | * |
| 955 | * this uses the hcd framework to hook up to host side drivers. |
| 956 | * its root hub will only have one device, otherwise it acts like |
| 957 | * a normal host controller. |
| 958 | * |
| 959 | * when urbs are queued, they're just stuck on a list that we |
| 960 | * scan in a timer callback. that callback connects writes from |
| 961 | * the host with reads from the device, and so on, based on the |
| 962 | * usb 2.0 rules. |
| 963 | */ |
| 964 | |
| 965 | static int dummy_urb_enqueue ( |
| 966 | struct usb_hcd *hcd, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 967 | struct urb *urb, |
Al Viro | 55016f1 | 2005-10-21 03:21:58 -0400 | [diff] [blame] | 968 | gfp_t mem_flags |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 969 | ) { |
| 970 | struct dummy *dum; |
| 971 | struct urbp *urbp; |
| 972 | unsigned long flags; |
Alan Stern | e9df41c | 2007-08-08 11:48:02 -0400 | [diff] [blame] | 973 | int rc; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 974 | |
| 975 | if (!urb->transfer_buffer && urb->transfer_buffer_length) |
| 976 | return -EINVAL; |
| 977 | |
| 978 | urbp = kmalloc (sizeof *urbp, mem_flags); |
| 979 | if (!urbp) |
| 980 | return -ENOMEM; |
| 981 | urbp->urb = urb; |
| 982 | |
| 983 | dum = hcd_to_dummy (hcd); |
| 984 | spin_lock_irqsave (&dum->lock, flags); |
Alan Stern | e9df41c | 2007-08-08 11:48:02 -0400 | [diff] [blame] | 985 | rc = usb_hcd_link_urb_to_ep(hcd, urb); |
| 986 | if (rc) { |
| 987 | kfree(urbp); |
| 988 | goto done; |
| 989 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 990 | |
| 991 | if (!dum->udev) { |
| 992 | dum->udev = urb->dev; |
| 993 | usb_get_dev (dum->udev); |
| 994 | } else if (unlikely (dum->udev != urb->dev)) |
| 995 | dev_err (dummy_dev(dum), "usb_device address has changed!\n"); |
| 996 | |
| 997 | list_add_tail (&urbp->urbp_list, &dum->urbp_list); |
| 998 | urb->hcpriv = urbp; |
| 999 | if (usb_pipetype (urb->pipe) == PIPE_CONTROL) |
| 1000 | urb->error_count = 1; /* mark as a new urb */ |
| 1001 | |
| 1002 | /* kick the scheduler, it'll do the rest */ |
| 1003 | if (!timer_pending (&dum->timer)) |
| 1004 | mod_timer (&dum->timer, jiffies + 1); |
| 1005 | |
Alan Stern | e9df41c | 2007-08-08 11:48:02 -0400 | [diff] [blame] | 1006 | done: |
Alan Stern | 63f991b | 2007-09-04 09:53:24 -0400 | [diff] [blame] | 1007 | spin_unlock_irqrestore(&dum->lock, flags); |
Alan Stern | e9df41c | 2007-08-08 11:48:02 -0400 | [diff] [blame] | 1008 | return rc; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1009 | } |
| 1010 | |
Alan Stern | e9df41c | 2007-08-08 11:48:02 -0400 | [diff] [blame] | 1011 | 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] | 1012 | { |
Alan Stern | 391eca9 | 2005-05-10 15:34:16 -0400 | [diff] [blame] | 1013 | struct dummy *dum; |
| 1014 | unsigned long flags; |
Alan Stern | e9df41c | 2007-08-08 11:48:02 -0400 | [diff] [blame] | 1015 | int rc; |
Alan Stern | 391eca9 | 2005-05-10 15:34:16 -0400 | [diff] [blame] | 1016 | |
| 1017 | /* giveback happens automatically in timer callback, |
| 1018 | * so make sure the callback happens */ |
| 1019 | dum = hcd_to_dummy (hcd); |
| 1020 | spin_lock_irqsave (&dum->lock, flags); |
Alan Stern | e9df41c | 2007-08-08 11:48:02 -0400 | [diff] [blame] | 1021 | |
| 1022 | rc = usb_hcd_check_unlink_urb(hcd, urb, status); |
| 1023 | if (!rc && dum->rh_state != DUMMY_RH_RUNNING && |
| 1024 | !list_empty(&dum->urbp_list)) |
Alan Stern | 391eca9 | 2005-05-10 15:34:16 -0400 | [diff] [blame] | 1025 | mod_timer (&dum->timer, jiffies); |
Alan Stern | e9df41c | 2007-08-08 11:48:02 -0400 | [diff] [blame] | 1026 | |
Alan Stern | 391eca9 | 2005-05-10 15:34:16 -0400 | [diff] [blame] | 1027 | spin_unlock_irqrestore (&dum->lock, flags); |
Alan Stern | e9df41c | 2007-08-08 11:48:02 -0400 | [diff] [blame] | 1028 | return rc; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1029 | } |
| 1030 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1031 | /* transfer up to a frame's worth; caller must own lock */ |
| 1032 | static int |
Alan Stern | 4d2f110 | 2007-08-24 15:40:10 -0400 | [diff] [blame] | 1033 | transfer(struct dummy *dum, struct urb *urb, struct dummy_ep *ep, int limit, |
| 1034 | int *status) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1035 | { |
| 1036 | struct dummy_request *req; |
| 1037 | |
| 1038 | top: |
| 1039 | /* if there's no request queued, the device is NAKing; return */ |
| 1040 | list_for_each_entry (req, &ep->queue, queue) { |
| 1041 | unsigned host_len, dev_len, len; |
| 1042 | int is_short, to_host; |
| 1043 | int rescan = 0; |
| 1044 | |
| 1045 | /* 1..N packets of ep->ep.maxpacket each ... the last one |
| 1046 | * may be short (including zero length). |
| 1047 | * |
| 1048 | * writer can send a zlp explicitly (length 0) or implicitly |
| 1049 | * (length mod maxpacket zero, and 'zero' flag); they always |
| 1050 | * terminate reads. |
| 1051 | */ |
| 1052 | host_len = urb->transfer_buffer_length - urb->actual_length; |
| 1053 | dev_len = req->req.length - req->req.actual; |
| 1054 | len = min (host_len, dev_len); |
| 1055 | |
| 1056 | /* FIXME update emulated data toggle too */ |
| 1057 | |
| 1058 | to_host = usb_pipein (urb->pipe); |
| 1059 | if (unlikely (len == 0)) |
| 1060 | is_short = 1; |
| 1061 | else { |
| 1062 | char *ubuf, *rbuf; |
| 1063 | |
| 1064 | /* not enough bandwidth left? */ |
| 1065 | if (limit < ep->ep.maxpacket && limit < len) |
| 1066 | break; |
| 1067 | len = min (len, (unsigned) limit); |
| 1068 | if (len == 0) |
| 1069 | break; |
| 1070 | |
| 1071 | /* use an extra pass for the final short packet */ |
| 1072 | if (len > ep->ep.maxpacket) { |
| 1073 | rescan = 1; |
| 1074 | len -= (len % ep->ep.maxpacket); |
| 1075 | } |
| 1076 | is_short = (len % ep->ep.maxpacket) != 0; |
| 1077 | |
| 1078 | /* else transfer packet(s) */ |
| 1079 | ubuf = urb->transfer_buffer + urb->actual_length; |
| 1080 | rbuf = req->req.buf + req->req.actual; |
| 1081 | if (to_host) |
| 1082 | memcpy (ubuf, rbuf, len); |
| 1083 | else |
| 1084 | memcpy (rbuf, ubuf, len); |
| 1085 | ep->last_io = jiffies; |
| 1086 | |
| 1087 | limit -= len; |
| 1088 | urb->actual_length += len; |
| 1089 | req->req.actual += len; |
| 1090 | } |
| 1091 | |
| 1092 | /* short packets terminate, maybe with overflow/underflow. |
| 1093 | * it's only really an error to write too much. |
| 1094 | * |
| 1095 | * partially filling a buffer optionally blocks queue advances |
| 1096 | * (so completion handlers can clean up the queue) but we don't |
Alan Stern | b0d9efb | 2007-08-21 15:39:21 -0400 | [diff] [blame] | 1097 | * need to emulate such data-in-flight. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1098 | */ |
| 1099 | if (is_short) { |
| 1100 | if (host_len == dev_len) { |
| 1101 | req->req.status = 0; |
Alan Stern | 4d2f110 | 2007-08-24 15:40:10 -0400 | [diff] [blame] | 1102 | *status = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1103 | } else if (to_host) { |
| 1104 | req->req.status = 0; |
| 1105 | if (dev_len > host_len) |
Alan Stern | 4d2f110 | 2007-08-24 15:40:10 -0400 | [diff] [blame] | 1106 | *status = -EOVERFLOW; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1107 | else |
Alan Stern | 4d2f110 | 2007-08-24 15:40:10 -0400 | [diff] [blame] | 1108 | *status = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1109 | } else if (!to_host) { |
Alan Stern | 4d2f110 | 2007-08-24 15:40:10 -0400 | [diff] [blame] | 1110 | *status = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1111 | if (host_len > dev_len) |
| 1112 | req->req.status = -EOVERFLOW; |
| 1113 | else |
| 1114 | req->req.status = 0; |
| 1115 | } |
| 1116 | |
| 1117 | /* many requests terminate without a short packet */ |
| 1118 | } else { |
| 1119 | if (req->req.length == req->req.actual |
| 1120 | && !req->req.zero) |
| 1121 | req->req.status = 0; |
| 1122 | if (urb->transfer_buffer_length == urb->actual_length |
| 1123 | && !(urb->transfer_flags |
Alan Stern | 4d2f110 | 2007-08-24 15:40:10 -0400 | [diff] [blame] | 1124 | & URB_ZERO_PACKET)) |
| 1125 | *status = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1126 | } |
| 1127 | |
| 1128 | /* device side completion --> continuable */ |
| 1129 | if (req->req.status != -EINPROGRESS) { |
| 1130 | list_del_init (&req->queue); |
| 1131 | |
| 1132 | spin_unlock (&dum->lock); |
| 1133 | req->req.complete (&ep->ep, &req->req); |
| 1134 | spin_lock (&dum->lock); |
| 1135 | |
| 1136 | /* requests might have been unlinked... */ |
| 1137 | rescan = 1; |
| 1138 | } |
| 1139 | |
| 1140 | /* host side completion --> terminate */ |
Alan Stern | 4d2f110 | 2007-08-24 15:40:10 -0400 | [diff] [blame] | 1141 | if (*status != -EINPROGRESS) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1142 | break; |
| 1143 | |
| 1144 | /* rescan to continue with any other queued i/o */ |
| 1145 | if (rescan) |
| 1146 | goto top; |
| 1147 | } |
| 1148 | return limit; |
| 1149 | } |
| 1150 | |
| 1151 | static int periodic_bytes (struct dummy *dum, struct dummy_ep *ep) |
| 1152 | { |
| 1153 | int limit = ep->ep.maxpacket; |
| 1154 | |
| 1155 | if (dum->gadget.speed == USB_SPEED_HIGH) { |
| 1156 | int tmp; |
| 1157 | |
| 1158 | /* high bandwidth mode */ |
| 1159 | tmp = le16_to_cpu(ep->desc->wMaxPacketSize); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1160 | tmp = (tmp >> 11) & 0x03; |
| 1161 | tmp *= 8 /* applies to entire frame */; |
| 1162 | limit += limit * tmp; |
| 1163 | } |
| 1164 | return limit; |
| 1165 | } |
| 1166 | |
| 1167 | #define is_active(dum) ((dum->port_status & \ |
| 1168 | (USB_PORT_STAT_CONNECTION | USB_PORT_STAT_ENABLE | \ |
| 1169 | USB_PORT_STAT_SUSPEND)) \ |
| 1170 | == (USB_PORT_STAT_CONNECTION | USB_PORT_STAT_ENABLE)) |
| 1171 | |
| 1172 | static struct dummy_ep *find_endpoint (struct dummy *dum, u8 address) |
| 1173 | { |
| 1174 | int i; |
| 1175 | |
| 1176 | if (!is_active (dum)) |
| 1177 | return NULL; |
| 1178 | if ((address & ~USB_DIR_IN) == 0) |
| 1179 | return &dum->ep [0]; |
| 1180 | for (i = 1; i < DUMMY_ENDPOINTS; i++) { |
| 1181 | struct dummy_ep *ep = &dum->ep [i]; |
| 1182 | |
| 1183 | if (!ep->desc) |
| 1184 | continue; |
| 1185 | if (ep->desc->bEndpointAddress == address) |
| 1186 | return ep; |
| 1187 | } |
| 1188 | return NULL; |
| 1189 | } |
| 1190 | |
| 1191 | #undef is_active |
| 1192 | |
| 1193 | #define Dev_Request (USB_TYPE_STANDARD | USB_RECIP_DEVICE) |
| 1194 | #define Dev_InRequest (Dev_Request | USB_DIR_IN) |
| 1195 | #define Intf_Request (USB_TYPE_STANDARD | USB_RECIP_INTERFACE) |
| 1196 | #define Intf_InRequest (Intf_Request | USB_DIR_IN) |
| 1197 | #define Ep_Request (USB_TYPE_STANDARD | USB_RECIP_ENDPOINT) |
| 1198 | #define Ep_InRequest (Ep_Request | USB_DIR_IN) |
| 1199 | |
Tatyana Brokhman | 8be8a9d | 2010-11-01 17:38:05 +0200 | [diff] [blame] | 1200 | |
| 1201 | /** |
| 1202 | * handle_control_request() - handles all control transfers |
| 1203 | * @dum: pointer to dummy (the_controller) |
| 1204 | * @urb: the urb request to handle |
| 1205 | * @setup: pointer to the setup data for a USB device control |
| 1206 | * request |
| 1207 | * @status: pointer to request handling status |
| 1208 | * |
| 1209 | * Return 0 - if the request was handled |
| 1210 | * 1 - if the request wasn't handles |
| 1211 | * error code on error |
| 1212 | */ |
| 1213 | static int handle_control_request(struct dummy *dum, struct urb *urb, |
| 1214 | struct usb_ctrlrequest *setup, |
| 1215 | int *status) |
| 1216 | { |
| 1217 | struct dummy_ep *ep2; |
| 1218 | int ret_val = 1; |
| 1219 | unsigned w_index; |
| 1220 | unsigned w_value; |
| 1221 | |
| 1222 | w_index = le16_to_cpu(setup->wIndex); |
| 1223 | w_value = le16_to_cpu(setup->wValue); |
| 1224 | switch (setup->bRequest) { |
| 1225 | case USB_REQ_SET_ADDRESS: |
| 1226 | if (setup->bRequestType != Dev_Request) |
| 1227 | break; |
| 1228 | dum->address = w_value; |
| 1229 | *status = 0; |
| 1230 | dev_dbg(udc_dev(dum), "set_address = %d\n", |
| 1231 | w_value); |
| 1232 | ret_val = 0; |
| 1233 | break; |
| 1234 | case USB_REQ_SET_FEATURE: |
| 1235 | if (setup->bRequestType == Dev_Request) { |
| 1236 | ret_val = 0; |
| 1237 | switch (w_value) { |
| 1238 | case USB_DEVICE_REMOTE_WAKEUP: |
| 1239 | break; |
| 1240 | case USB_DEVICE_B_HNP_ENABLE: |
| 1241 | dum->gadget.b_hnp_enable = 1; |
| 1242 | break; |
| 1243 | case USB_DEVICE_A_HNP_SUPPORT: |
| 1244 | dum->gadget.a_hnp_support = 1; |
| 1245 | break; |
| 1246 | case USB_DEVICE_A_ALT_HNP_SUPPORT: |
| 1247 | dum->gadget.a_alt_hnp_support = 1; |
| 1248 | break; |
| 1249 | default: |
| 1250 | ret_val = -EOPNOTSUPP; |
| 1251 | } |
| 1252 | if (ret_val == 0) { |
| 1253 | dum->devstatus |= (1 << w_value); |
| 1254 | *status = 0; |
| 1255 | } |
| 1256 | } else if (setup->bRequestType == Ep_Request) { |
| 1257 | /* endpoint halt */ |
| 1258 | ep2 = find_endpoint(dum, w_index); |
| 1259 | if (!ep2 || ep2->ep.name == ep0name) { |
| 1260 | ret_val = -EOPNOTSUPP; |
| 1261 | break; |
| 1262 | } |
| 1263 | ep2->halted = 1; |
| 1264 | ret_val = 0; |
| 1265 | *status = 0; |
| 1266 | } |
| 1267 | break; |
| 1268 | case USB_REQ_CLEAR_FEATURE: |
| 1269 | if (setup->bRequestType == Dev_Request) { |
| 1270 | ret_val = 0; |
| 1271 | switch (w_value) { |
| 1272 | case USB_DEVICE_REMOTE_WAKEUP: |
| 1273 | w_value = USB_DEVICE_REMOTE_WAKEUP; |
| 1274 | break; |
| 1275 | default: |
| 1276 | ret_val = -EOPNOTSUPP; |
| 1277 | break; |
| 1278 | } |
| 1279 | if (ret_val == 0) { |
| 1280 | dum->devstatus &= ~(1 << w_value); |
| 1281 | *status = 0; |
| 1282 | } |
| 1283 | } else if (setup->bRequestType == Ep_Request) { |
| 1284 | /* endpoint halt */ |
| 1285 | ep2 = find_endpoint(dum, w_index); |
| 1286 | if (!ep2) { |
| 1287 | ret_val = -EOPNOTSUPP; |
| 1288 | break; |
| 1289 | } |
| 1290 | if (!ep2->wedged) |
| 1291 | ep2->halted = 0; |
| 1292 | ret_val = 0; |
| 1293 | *status = 0; |
| 1294 | } |
| 1295 | break; |
| 1296 | case USB_REQ_GET_STATUS: |
| 1297 | if (setup->bRequestType == Dev_InRequest |
| 1298 | || setup->bRequestType == Intf_InRequest |
| 1299 | || setup->bRequestType == Ep_InRequest) { |
| 1300 | char *buf; |
| 1301 | /* |
| 1302 | * device: remote wakeup, selfpowered |
| 1303 | * interface: nothing |
| 1304 | * endpoint: halt |
| 1305 | */ |
| 1306 | buf = (char *)urb->transfer_buffer; |
| 1307 | if (urb->transfer_buffer_length > 0) { |
| 1308 | if (setup->bRequestType == Ep_InRequest) { |
| 1309 | ep2 = find_endpoint(dum, w_index); |
| 1310 | if (!ep2) { |
| 1311 | ret_val = -EOPNOTSUPP; |
| 1312 | break; |
| 1313 | } |
| 1314 | buf[0] = ep2->halted; |
| 1315 | } else if (setup->bRequestType == |
| 1316 | Dev_InRequest) { |
| 1317 | buf[0] = (u8)dum->devstatus; |
| 1318 | } else |
| 1319 | buf[0] = 0; |
| 1320 | } |
| 1321 | if (urb->transfer_buffer_length > 1) |
| 1322 | buf[1] = 0; |
| 1323 | urb->actual_length = min_t(u32, 2, |
| 1324 | urb->transfer_buffer_length); |
| 1325 | ret_val = 0; |
| 1326 | *status = 0; |
| 1327 | } |
| 1328 | break; |
| 1329 | } |
| 1330 | return ret_val; |
| 1331 | } |
| 1332 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1333 | /* drive both sides of the transfers; looks like irq handlers to |
| 1334 | * both drivers except the callbacks aren't in_irq(). |
| 1335 | */ |
| 1336 | static void dummy_timer (unsigned long _dum) |
| 1337 | { |
| 1338 | struct dummy *dum = (struct dummy *) _dum; |
| 1339 | struct urbp *urbp, *tmp; |
| 1340 | unsigned long flags; |
| 1341 | int limit, total; |
| 1342 | int i; |
| 1343 | |
| 1344 | /* simplistic model for one frame's bandwidth */ |
| 1345 | switch (dum->gadget.speed) { |
| 1346 | case USB_SPEED_LOW: |
| 1347 | total = 8/*bytes*/ * 12/*packets*/; |
| 1348 | break; |
| 1349 | case USB_SPEED_FULL: |
| 1350 | total = 64/*bytes*/ * 19/*packets*/; |
| 1351 | break; |
| 1352 | case USB_SPEED_HIGH: |
| 1353 | total = 512/*bytes*/ * 13/*packets*/ * 8/*uframes*/; |
| 1354 | break; |
| 1355 | default: |
| 1356 | dev_err (dummy_dev(dum), "bogus device speed\n"); |
| 1357 | return; |
| 1358 | } |
| 1359 | |
| 1360 | /* FIXME if HZ != 1000 this will probably misbehave ... */ |
| 1361 | |
| 1362 | /* look at each urb queued by the host side driver */ |
| 1363 | spin_lock_irqsave (&dum->lock, flags); |
| 1364 | |
| 1365 | if (!dum->udev) { |
| 1366 | dev_err (dummy_dev(dum), |
| 1367 | "timer fired with no URBs pending?\n"); |
| 1368 | spin_unlock_irqrestore (&dum->lock, flags); |
| 1369 | return; |
| 1370 | } |
| 1371 | |
| 1372 | for (i = 0; i < DUMMY_ENDPOINTS; i++) { |
| 1373 | if (!ep_name [i]) |
| 1374 | break; |
| 1375 | dum->ep [i].already_seen = 0; |
| 1376 | } |
| 1377 | |
| 1378 | restart: |
| 1379 | list_for_each_entry_safe (urbp, tmp, &dum->urbp_list, urbp_list) { |
| 1380 | struct urb *urb; |
| 1381 | struct dummy_request *req; |
| 1382 | u8 address; |
| 1383 | struct dummy_ep *ep = NULL; |
| 1384 | int type; |
Alan Stern | 4d2f110 | 2007-08-24 15:40:10 -0400 | [diff] [blame] | 1385 | int status = -EINPROGRESS; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1386 | |
| 1387 | urb = urbp->urb; |
Alan Stern | eb23105 | 2007-08-21 15:40:36 -0400 | [diff] [blame] | 1388 | if (urb->unlinked) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1389 | goto return_urb; |
Alan Stern | eb23105 | 2007-08-21 15:40:36 -0400 | [diff] [blame] | 1390 | else if (dum->rh_state != DUMMY_RH_RUNNING) |
Alan Stern | 391eca9 | 2005-05-10 15:34:16 -0400 | [diff] [blame] | 1391 | continue; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1392 | type = usb_pipetype (urb->pipe); |
| 1393 | |
| 1394 | /* used up this frame's non-periodic bandwidth? |
| 1395 | * FIXME there's infinite bandwidth for control and |
| 1396 | * periodic transfers ... unrealistic. |
| 1397 | */ |
| 1398 | if (total <= 0 && type == PIPE_BULK) |
| 1399 | continue; |
| 1400 | |
| 1401 | /* find the gadget's ep for this request (if configured) */ |
| 1402 | address = usb_pipeendpoint (urb->pipe); |
| 1403 | if (usb_pipein (urb->pipe)) |
| 1404 | address |= USB_DIR_IN; |
| 1405 | ep = find_endpoint(dum, address); |
| 1406 | if (!ep) { |
| 1407 | /* set_configuration() disagreement */ |
| 1408 | dev_dbg (dummy_dev(dum), |
| 1409 | "no ep configured for urb %p\n", |
| 1410 | urb); |
Alan Stern | 4d2f110 | 2007-08-24 15:40:10 -0400 | [diff] [blame] | 1411 | status = -EPROTO; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1412 | goto return_urb; |
| 1413 | } |
| 1414 | |
| 1415 | if (ep->already_seen) |
| 1416 | continue; |
| 1417 | ep->already_seen = 1; |
| 1418 | if (ep == &dum->ep [0] && urb->error_count) { |
| 1419 | ep->setup_stage = 1; /* a new urb */ |
| 1420 | urb->error_count = 0; |
| 1421 | } |
| 1422 | if (ep->halted && !ep->setup_stage) { |
| 1423 | /* NOTE: must not be iso! */ |
| 1424 | dev_dbg (dummy_dev(dum), "ep %s halted, urb %p\n", |
| 1425 | ep->ep.name, urb); |
Alan Stern | 4d2f110 | 2007-08-24 15:40:10 -0400 | [diff] [blame] | 1426 | status = -EPIPE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1427 | goto return_urb; |
| 1428 | } |
| 1429 | /* FIXME make sure both ends agree on maxpacket */ |
| 1430 | |
| 1431 | /* handle control requests */ |
| 1432 | if (ep == &dum->ep [0] && ep->setup_stage) { |
| 1433 | struct usb_ctrlrequest setup; |
| 1434 | int value = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1435 | |
| 1436 | setup = *(struct usb_ctrlrequest*) urb->setup_packet; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1437 | /* paranoia, in case of stale queued data */ |
| 1438 | list_for_each_entry (req, &ep->queue, queue) { |
| 1439 | list_del_init (&req->queue); |
| 1440 | req->req.status = -EOVERFLOW; |
Alan Stern | d9b7625 | 2005-05-03 16:15:43 -0400 | [diff] [blame] | 1441 | dev_dbg (udc_dev(dum), "stale req = %p\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1442 | req); |
| 1443 | |
| 1444 | spin_unlock (&dum->lock); |
| 1445 | req->req.complete (&ep->ep, &req->req); |
| 1446 | spin_lock (&dum->lock); |
| 1447 | ep->already_seen = 0; |
| 1448 | goto restart; |
| 1449 | } |
| 1450 | |
| 1451 | /* gadget driver never sees set_address or operations |
| 1452 | * on standard feature flags. some hardware doesn't |
| 1453 | * even expose them. |
| 1454 | */ |
| 1455 | ep->last_io = jiffies; |
| 1456 | ep->setup_stage = 0; |
| 1457 | ep->halted = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1458 | |
Tatyana Brokhman | 8be8a9d | 2010-11-01 17:38:05 +0200 | [diff] [blame] | 1459 | value = handle_control_request(dum, urb, &setup, |
| 1460 | &status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1461 | |
| 1462 | /* gadget driver handles all other requests. block |
| 1463 | * until setup() returns; no reentrancy issues etc. |
| 1464 | */ |
| 1465 | if (value > 0) { |
| 1466 | spin_unlock (&dum->lock); |
| 1467 | value = dum->driver->setup (&dum->gadget, |
| 1468 | &setup); |
| 1469 | spin_lock (&dum->lock); |
| 1470 | |
| 1471 | if (value >= 0) { |
| 1472 | /* no delays (max 64KB data stage) */ |
| 1473 | limit = 64*1024; |
| 1474 | goto treat_control_like_bulk; |
| 1475 | } |
| 1476 | /* error, see below */ |
| 1477 | } |
| 1478 | |
| 1479 | if (value < 0) { |
| 1480 | if (value != -EOPNOTSUPP) |
Alan Stern | d9b7625 | 2005-05-03 16:15:43 -0400 | [diff] [blame] | 1481 | dev_dbg (udc_dev(dum), |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1482 | "setup --> %d\n", |
| 1483 | value); |
Alan Stern | 4d2f110 | 2007-08-24 15:40:10 -0400 | [diff] [blame] | 1484 | status = -EPIPE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1485 | urb->actual_length = 0; |
| 1486 | } |
| 1487 | |
| 1488 | goto return_urb; |
| 1489 | } |
| 1490 | |
| 1491 | /* non-control requests */ |
| 1492 | limit = total; |
| 1493 | switch (usb_pipetype (urb->pipe)) { |
| 1494 | case PIPE_ISOCHRONOUS: |
| 1495 | /* FIXME is it urb->interval since the last xfer? |
| 1496 | * use urb->iso_frame_desc[i]. |
| 1497 | * complete whether or not ep has requests queued. |
| 1498 | * report random errors, to debug drivers. |
| 1499 | */ |
| 1500 | limit = max (limit, periodic_bytes (dum, ep)); |
Alan Stern | 4d2f110 | 2007-08-24 15:40:10 -0400 | [diff] [blame] | 1501 | status = -ENOSYS; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1502 | break; |
| 1503 | |
| 1504 | case PIPE_INTERRUPT: |
| 1505 | /* FIXME is it urb->interval since the last xfer? |
| 1506 | * this almost certainly polls too fast. |
| 1507 | */ |
| 1508 | limit = max (limit, periodic_bytes (dum, ep)); |
| 1509 | /* FALLTHROUGH */ |
| 1510 | |
| 1511 | // case PIPE_BULK: case PIPE_CONTROL: |
| 1512 | default: |
| 1513 | treat_control_like_bulk: |
| 1514 | ep->last_io = jiffies; |
Alan Stern | 4d2f110 | 2007-08-24 15:40:10 -0400 | [diff] [blame] | 1515 | total = transfer(dum, urb, ep, limit, &status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1516 | break; |
| 1517 | } |
| 1518 | |
| 1519 | /* incomplete transfer? */ |
Alan Stern | 4d2f110 | 2007-08-24 15:40:10 -0400 | [diff] [blame] | 1520 | if (status == -EINPROGRESS) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1521 | continue; |
| 1522 | |
| 1523 | return_urb: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1524 | list_del (&urbp->urbp_list); |
| 1525 | kfree (urbp); |
| 1526 | if (ep) |
| 1527 | ep->already_seen = ep->setup_stage = 0; |
| 1528 | |
Alan Stern | e9df41c | 2007-08-08 11:48:02 -0400 | [diff] [blame] | 1529 | usb_hcd_unlink_urb_from_ep(dummy_to_hcd(dum), urb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1530 | spin_unlock (&dum->lock); |
Alan Stern | 4a00027 | 2007-08-24 15:42:24 -0400 | [diff] [blame] | 1531 | usb_hcd_giveback_urb(dummy_to_hcd(dum), urb, status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1532 | spin_lock (&dum->lock); |
| 1533 | |
| 1534 | goto restart; |
| 1535 | } |
| 1536 | |
Alan Stern | 391eca9 | 2005-05-10 15:34:16 -0400 | [diff] [blame] | 1537 | if (list_empty (&dum->urbp_list)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1538 | usb_put_dev (dum->udev); |
| 1539 | dum->udev = NULL; |
Alan Stern | 391eca9 | 2005-05-10 15:34:16 -0400 | [diff] [blame] | 1540 | } else if (dum->rh_state == DUMMY_RH_RUNNING) { |
| 1541 | /* want a 1 msec delay here */ |
| 1542 | mod_timer (&dum->timer, jiffies + msecs_to_jiffies(1)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1543 | } |
| 1544 | |
| 1545 | spin_unlock_irqrestore (&dum->lock, flags); |
| 1546 | } |
| 1547 | |
| 1548 | /*-------------------------------------------------------------------------*/ |
| 1549 | |
| 1550 | #define PORT_C_MASK \ |
Alan Stern | c2db8b5 | 2005-04-29 16:30:48 -0400 | [diff] [blame] | 1551 | ((USB_PORT_STAT_C_CONNECTION \ |
| 1552 | | USB_PORT_STAT_C_ENABLE \ |
| 1553 | | USB_PORT_STAT_C_SUSPEND \ |
| 1554 | | USB_PORT_STAT_C_OVERCURRENT \ |
| 1555 | | USB_PORT_STAT_C_RESET) << 16) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1556 | |
| 1557 | static int dummy_hub_status (struct usb_hcd *hcd, char *buf) |
| 1558 | { |
| 1559 | struct dummy *dum; |
| 1560 | unsigned long flags; |
Alan Stern | 391eca9 | 2005-05-10 15:34:16 -0400 | [diff] [blame] | 1561 | int retval = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1562 | |
| 1563 | dum = hcd_to_dummy (hcd); |
| 1564 | |
| 1565 | spin_lock_irqsave (&dum->lock, flags); |
Alan Stern | 541c7d4 | 2010-06-22 16:39:10 -0400 | [diff] [blame] | 1566 | if (!HCD_HW_ACCESSIBLE(hcd)) |
Alan Stern | 391eca9 | 2005-05-10 15:34:16 -0400 | [diff] [blame] | 1567 | goto done; |
Alan Stern | f1c39fa | 2005-05-03 16:24:04 -0400 | [diff] [blame] | 1568 | |
| 1569 | if (dum->resuming && time_after_eq (jiffies, dum->re_timeout)) { |
| 1570 | dum->port_status |= (USB_PORT_STAT_C_SUSPEND << 16); |
| 1571 | dum->port_status &= ~USB_PORT_STAT_SUSPEND; |
| 1572 | set_link_state (dum); |
| 1573 | } |
| 1574 | |
Alan Stern | 391eca9 | 2005-05-10 15:34:16 -0400 | [diff] [blame] | 1575 | if ((dum->port_status & PORT_C_MASK) != 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1576 | *buf = (1 << 1); |
| 1577 | dev_dbg (dummy_dev(dum), "port status 0x%08x has changes\n", |
Alan Stern | 391eca9 | 2005-05-10 15:34:16 -0400 | [diff] [blame] | 1578 | dum->port_status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1579 | retval = 1; |
Alan Stern | 391eca9 | 2005-05-10 15:34:16 -0400 | [diff] [blame] | 1580 | if (dum->rh_state == DUMMY_RH_SUSPENDED) |
| 1581 | usb_hcd_resume_root_hub (hcd); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1582 | } |
Alan Stern | 391eca9 | 2005-05-10 15:34:16 -0400 | [diff] [blame] | 1583 | done: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1584 | spin_unlock_irqrestore (&dum->lock, flags); |
| 1585 | return retval; |
| 1586 | } |
| 1587 | |
| 1588 | static inline void |
| 1589 | hub_descriptor (struct usb_hub_descriptor *desc) |
| 1590 | { |
| 1591 | memset (desc, 0, sizeof *desc); |
| 1592 | desc->bDescriptorType = 0x29; |
| 1593 | desc->bDescLength = 9; |
Al Viro | fd05e72 | 2008-04-28 07:00:16 +0100 | [diff] [blame] | 1594 | desc->wHubCharacteristics = cpu_to_le16(0x0001); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1595 | desc->bNbrPorts = 1; |
| 1596 | desc->bitmap [0] = 0xff; |
| 1597 | desc->bitmap [1] = 0xff; |
| 1598 | } |
| 1599 | |
| 1600 | static int dummy_hub_control ( |
| 1601 | struct usb_hcd *hcd, |
| 1602 | u16 typeReq, |
| 1603 | u16 wValue, |
| 1604 | u16 wIndex, |
| 1605 | char *buf, |
| 1606 | u16 wLength |
| 1607 | ) { |
| 1608 | struct dummy *dum; |
| 1609 | int retval = 0; |
| 1610 | unsigned long flags; |
| 1611 | |
Alan Stern | 541c7d4 | 2010-06-22 16:39:10 -0400 | [diff] [blame] | 1612 | if (!HCD_HW_ACCESSIBLE(hcd)) |
Alan Stern | 391eca9 | 2005-05-10 15:34:16 -0400 | [diff] [blame] | 1613 | return -ETIMEDOUT; |
| 1614 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1615 | dum = hcd_to_dummy (hcd); |
| 1616 | spin_lock_irqsave (&dum->lock, flags); |
| 1617 | switch (typeReq) { |
| 1618 | case ClearHubFeature: |
| 1619 | break; |
| 1620 | case ClearPortFeature: |
| 1621 | switch (wValue) { |
| 1622 | case USB_PORT_FEAT_SUSPEND: |
Alan Stern | c2db8b5 | 2005-04-29 16:30:48 -0400 | [diff] [blame] | 1623 | if (dum->port_status & USB_PORT_STAT_SUSPEND) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1624 | /* 20msec resume signaling */ |
| 1625 | dum->resuming = 1; |
| 1626 | dum->re_timeout = jiffies + |
Alan Stern | f1c39fa | 2005-05-03 16:24:04 -0400 | [diff] [blame] | 1627 | msecs_to_jiffies(20); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1628 | } |
| 1629 | break; |
| 1630 | case USB_PORT_FEAT_POWER: |
Alan Stern | f1c39fa | 2005-05-03 16:24:04 -0400 | [diff] [blame] | 1631 | if (dum->port_status & USB_PORT_STAT_POWER) |
| 1632 | dev_dbg (dummy_dev(dum), "power-off\n"); |
| 1633 | /* FALLS THROUGH */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1634 | default: |
| 1635 | dum->port_status &= ~(1 << wValue); |
Alan Stern | f1c39fa | 2005-05-03 16:24:04 -0400 | [diff] [blame] | 1636 | set_link_state (dum); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1637 | } |
| 1638 | break; |
| 1639 | case GetHubDescriptor: |
| 1640 | hub_descriptor ((struct usb_hub_descriptor *) buf); |
| 1641 | break; |
| 1642 | case GetHubStatus: |
Harvey Harrison | 551509d | 2009-02-11 14:11:36 -0800 | [diff] [blame] | 1643 | *(__le32 *) buf = cpu_to_le32 (0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1644 | break; |
| 1645 | case GetPortStatus: |
| 1646 | if (wIndex != 1) |
| 1647 | retval = -EPIPE; |
| 1648 | |
| 1649 | /* whoever resets or resumes must GetPortStatus to |
| 1650 | * complete it!! |
| 1651 | */ |
Alan Stern | f1c39fa | 2005-05-03 16:24:04 -0400 | [diff] [blame] | 1652 | if (dum->resuming && |
| 1653 | time_after_eq (jiffies, dum->re_timeout)) { |
Alan Stern | c2db8b5 | 2005-04-29 16:30:48 -0400 | [diff] [blame] | 1654 | dum->port_status |= (USB_PORT_STAT_C_SUSPEND << 16); |
| 1655 | dum->port_status &= ~USB_PORT_STAT_SUSPEND; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1656 | } |
Alan Stern | f1c39fa | 2005-05-03 16:24:04 -0400 | [diff] [blame] | 1657 | if ((dum->port_status & USB_PORT_STAT_RESET) != 0 && |
| 1658 | time_after_eq (jiffies, dum->re_timeout)) { |
Alan Stern | c2db8b5 | 2005-04-29 16:30:48 -0400 | [diff] [blame] | 1659 | dum->port_status |= (USB_PORT_STAT_C_RESET << 16); |
| 1660 | dum->port_status &= ~USB_PORT_STAT_RESET; |
Alan Stern | f1c39fa | 2005-05-03 16:24:04 -0400 | [diff] [blame] | 1661 | if (dum->pullup) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1662 | dum->port_status |= USB_PORT_STAT_ENABLE; |
| 1663 | /* give it the best speed we agree on */ |
| 1664 | dum->gadget.speed = dum->driver->speed; |
| 1665 | dum->gadget.ep0->maxpacket = 64; |
| 1666 | switch (dum->gadget.speed) { |
| 1667 | case USB_SPEED_HIGH: |
| 1668 | dum->port_status |= |
| 1669 | USB_PORT_STAT_HIGH_SPEED; |
| 1670 | break; |
| 1671 | case USB_SPEED_LOW: |
| 1672 | dum->gadget.ep0->maxpacket = 8; |
| 1673 | dum->port_status |= |
| 1674 | USB_PORT_STAT_LOW_SPEED; |
| 1675 | break; |
| 1676 | default: |
| 1677 | dum->gadget.speed = USB_SPEED_FULL; |
| 1678 | break; |
| 1679 | } |
| 1680 | } |
| 1681 | } |
Alan Stern | f1c39fa | 2005-05-03 16:24:04 -0400 | [diff] [blame] | 1682 | set_link_state (dum); |
Alan Stern | cc095b0 | 2005-05-10 15:28:38 -0400 | [diff] [blame] | 1683 | ((__le16 *) buf)[0] = cpu_to_le16 (dum->port_status); |
| 1684 | ((__le16 *) buf)[1] = cpu_to_le16 (dum->port_status >> 16); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1685 | break; |
| 1686 | case SetHubFeature: |
| 1687 | retval = -EPIPE; |
| 1688 | break; |
| 1689 | case SetPortFeature: |
| 1690 | switch (wValue) { |
| 1691 | case USB_PORT_FEAT_SUSPEND: |
Alan Stern | f1c39fa | 2005-05-03 16:24:04 -0400 | [diff] [blame] | 1692 | if (dum->active) { |
Alan Stern | c2db8b5 | 2005-04-29 16:30:48 -0400 | [diff] [blame] | 1693 | dum->port_status |= USB_PORT_STAT_SUSPEND; |
Alan Stern | f1c39fa | 2005-05-03 16:24:04 -0400 | [diff] [blame] | 1694 | |
| 1695 | /* HNP would happen here; for now we |
| 1696 | * assume b_bus_req is always true. |
| 1697 | */ |
| 1698 | set_link_state (dum); |
| 1699 | if (((1 << USB_DEVICE_B_HNP_ENABLE) |
| 1700 | & dum->devstatus) != 0) |
| 1701 | dev_dbg (dummy_dev(dum), |
Alan Stern | 5742b0c | 2005-05-02 11:25:17 -0400 | [diff] [blame] | 1702 | "no HNP yet!\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1703 | } |
| 1704 | break; |
Alan Stern | f1c39fa | 2005-05-03 16:24:04 -0400 | [diff] [blame] | 1705 | case USB_PORT_FEAT_POWER: |
| 1706 | dum->port_status |= USB_PORT_STAT_POWER; |
| 1707 | set_link_state (dum); |
| 1708 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1709 | case USB_PORT_FEAT_RESET: |
Alan Stern | f1c39fa | 2005-05-03 16:24:04 -0400 | [diff] [blame] | 1710 | /* if it's already enabled, disable */ |
| 1711 | dum->port_status &= ~(USB_PORT_STAT_ENABLE |
| 1712 | | USB_PORT_STAT_LOW_SPEED |
| 1713 | | USB_PORT_STAT_HIGH_SPEED); |
Alan Stern | 391eca9 | 2005-05-10 15:34:16 -0400 | [diff] [blame] | 1714 | dum->devstatus = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1715 | /* 50msec reset signaling */ |
| 1716 | dum->re_timeout = jiffies + msecs_to_jiffies(50); |
Alan Stern | f1c39fa | 2005-05-03 16:24:04 -0400 | [diff] [blame] | 1717 | /* FALLS THROUGH */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1718 | default: |
Alan Stern | f1c39fa | 2005-05-03 16:24:04 -0400 | [diff] [blame] | 1719 | if ((dum->port_status & USB_PORT_STAT_POWER) != 0) { |
| 1720 | dum->port_status |= (1 << wValue); |
| 1721 | set_link_state (dum); |
| 1722 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1723 | } |
| 1724 | break; |
| 1725 | |
| 1726 | default: |
| 1727 | dev_dbg (dummy_dev(dum), |
| 1728 | "hub control req%04x v%04x i%04x l%d\n", |
| 1729 | typeReq, wValue, wIndex, wLength); |
| 1730 | |
| 1731 | /* "protocol stall" on error */ |
| 1732 | retval = -EPIPE; |
| 1733 | } |
| 1734 | spin_unlock_irqrestore (&dum->lock, flags); |
Alan Stern | 685eb93 | 2005-05-03 16:27:26 -0400 | [diff] [blame] | 1735 | |
| 1736 | if ((dum->port_status & PORT_C_MASK) != 0) |
| 1737 | usb_hcd_poll_rh_status (hcd); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1738 | return retval; |
| 1739 | } |
| 1740 | |
Alan Stern | 0c0382e | 2005-10-13 17:08:02 -0400 | [diff] [blame] | 1741 | static int dummy_bus_suspend (struct usb_hcd *hcd) |
Alan Stern | 391eca9 | 2005-05-10 15:34:16 -0400 | [diff] [blame] | 1742 | { |
| 1743 | struct dummy *dum = hcd_to_dummy (hcd); |
| 1744 | |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 1745 | dev_dbg (&hcd->self.root_hub->dev, "%s\n", __func__); |
Alan Stern | 3cf0a22 | 2005-11-29 12:08:15 -0500 | [diff] [blame] | 1746 | |
Alan Stern | 391eca9 | 2005-05-10 15:34:16 -0400 | [diff] [blame] | 1747 | spin_lock_irq (&dum->lock); |
| 1748 | dum->rh_state = DUMMY_RH_SUSPENDED; |
| 1749 | set_link_state (dum); |
Alan Stern | 3cf0a22 | 2005-11-29 12:08:15 -0500 | [diff] [blame] | 1750 | hcd->state = HC_STATE_SUSPENDED; |
Alan Stern | 391eca9 | 2005-05-10 15:34:16 -0400 | [diff] [blame] | 1751 | spin_unlock_irq (&dum->lock); |
| 1752 | return 0; |
| 1753 | } |
| 1754 | |
Alan Stern | 0c0382e | 2005-10-13 17:08:02 -0400 | [diff] [blame] | 1755 | static int dummy_bus_resume (struct usb_hcd *hcd) |
Alan Stern | 391eca9 | 2005-05-10 15:34:16 -0400 | [diff] [blame] | 1756 | { |
| 1757 | struct dummy *dum = hcd_to_dummy (hcd); |
Alan Stern | 3cf0a22 | 2005-11-29 12:08:15 -0500 | [diff] [blame] | 1758 | int rc = 0; |
| 1759 | |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 1760 | dev_dbg (&hcd->self.root_hub->dev, "%s\n", __func__); |
Alan Stern | 391eca9 | 2005-05-10 15:34:16 -0400 | [diff] [blame] | 1761 | |
| 1762 | spin_lock_irq (&dum->lock); |
Alan Stern | 541c7d4 | 2010-06-22 16:39:10 -0400 | [diff] [blame] | 1763 | if (!HCD_HW_ACCESSIBLE(hcd)) { |
Alan Stern | cfa59da | 2007-06-21 16:25:35 -0400 | [diff] [blame] | 1764 | rc = -ESHUTDOWN; |
Alan Stern | 3cf0a22 | 2005-11-29 12:08:15 -0500 | [diff] [blame] | 1765 | } else { |
| 1766 | dum->rh_state = DUMMY_RH_RUNNING; |
| 1767 | set_link_state (dum); |
| 1768 | if (!list_empty(&dum->urbp_list)) |
| 1769 | mod_timer (&dum->timer, jiffies); |
| 1770 | hcd->state = HC_STATE_RUNNING; |
| 1771 | } |
Alan Stern | 391eca9 | 2005-05-10 15:34:16 -0400 | [diff] [blame] | 1772 | spin_unlock_irq (&dum->lock); |
Alan Stern | 3cf0a22 | 2005-11-29 12:08:15 -0500 | [diff] [blame] | 1773 | return rc; |
Alan Stern | 391eca9 | 2005-05-10 15:34:16 -0400 | [diff] [blame] | 1774 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1775 | |
| 1776 | /*-------------------------------------------------------------------------*/ |
| 1777 | |
| 1778 | static inline ssize_t |
| 1779 | show_urb (char *buf, size_t size, struct urb *urb) |
| 1780 | { |
| 1781 | int ep = usb_pipeendpoint (urb->pipe); |
| 1782 | |
| 1783 | return snprintf (buf, size, |
| 1784 | "urb/%p %s ep%d%s%s len %d/%d\n", |
| 1785 | urb, |
| 1786 | ({ char *s; |
| 1787 | switch (urb->dev->speed) { |
| 1788 | case USB_SPEED_LOW: s = "ls"; break; |
| 1789 | case USB_SPEED_FULL: s = "fs"; break; |
| 1790 | case USB_SPEED_HIGH: s = "hs"; break; |
| 1791 | default: s = "?"; break; |
| 1792 | }; s; }), |
| 1793 | ep, ep ? (usb_pipein (urb->pipe) ? "in" : "out") : "", |
| 1794 | ({ char *s; \ |
| 1795 | switch (usb_pipetype (urb->pipe)) { \ |
| 1796 | case PIPE_CONTROL: s = ""; break; \ |
| 1797 | case PIPE_BULK: s = "-bulk"; break; \ |
| 1798 | case PIPE_INTERRUPT: s = "-int"; break; \ |
| 1799 | default: s = "-iso"; break; \ |
| 1800 | }; s;}), |
| 1801 | urb->actual_length, urb->transfer_buffer_length); |
| 1802 | } |
| 1803 | |
| 1804 | static ssize_t |
Yani Ioannou | 10523b3 | 2005-05-17 06:43:37 -0400 | [diff] [blame] | 1805 | show_urbs (struct device *dev, struct device_attribute *attr, char *buf) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1806 | { |
| 1807 | struct usb_hcd *hcd = dev_get_drvdata (dev); |
| 1808 | struct dummy *dum = hcd_to_dummy (hcd); |
| 1809 | struct urbp *urbp; |
| 1810 | size_t size = 0; |
| 1811 | unsigned long flags; |
| 1812 | |
| 1813 | spin_lock_irqsave (&dum->lock, flags); |
| 1814 | list_for_each_entry (urbp, &dum->urbp_list, urbp_list) { |
| 1815 | size_t temp; |
| 1816 | |
| 1817 | temp = show_urb (buf, PAGE_SIZE - size, urbp->urb); |
| 1818 | buf += temp; |
| 1819 | size += temp; |
| 1820 | } |
| 1821 | spin_unlock_irqrestore (&dum->lock, flags); |
| 1822 | |
| 1823 | return size; |
| 1824 | } |
| 1825 | static DEVICE_ATTR (urbs, S_IRUGO, show_urbs, NULL); |
| 1826 | |
| 1827 | static int dummy_start (struct usb_hcd *hcd) |
| 1828 | { |
| 1829 | struct dummy *dum; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1830 | |
| 1831 | dum = hcd_to_dummy (hcd); |
| 1832 | |
| 1833 | /* |
| 1834 | * MASTER side init ... we emulate a root hub that'll only ever |
| 1835 | * talk to one device (the slave side). Also appears in sysfs, |
| 1836 | * just like more familiar pci-based HCDs. |
| 1837 | */ |
| 1838 | spin_lock_init (&dum->lock); |
| 1839 | init_timer (&dum->timer); |
| 1840 | dum->timer.function = dummy_timer; |
| 1841 | dum->timer.data = (unsigned long) dum; |
Alan Stern | 391eca9 | 2005-05-10 15:34:16 -0400 | [diff] [blame] | 1842 | dum->rh_state = DUMMY_RH_RUNNING; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1843 | |
| 1844 | INIT_LIST_HEAD (&dum->urbp_list); |
| 1845 | |
Alan Stern | caf29f6 | 2007-12-06 11:10:39 -0500 | [diff] [blame] | 1846 | hcd->power_budget = POWER_BUDGET; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1847 | hcd->state = HC_STATE_RUNNING; |
Alan Stern | 685eb93 | 2005-05-03 16:27:26 -0400 | [diff] [blame] | 1848 | hcd->uses_new_polling = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1849 | |
Alan Stern | 5742b0c | 2005-05-02 11:25:17 -0400 | [diff] [blame] | 1850 | #ifdef CONFIG_USB_OTG |
| 1851 | hcd->self.otg_port = 1; |
| 1852 | #endif |
| 1853 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1854 | /* FIXME 'urbs' should be a per-device thing, maybe in usbcore */ |
Alan Stern | efd54a3 | 2006-09-25 11:55:56 -0400 | [diff] [blame] | 1855 | return device_create_file (dummy_dev(dum), &dev_attr_urbs); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1856 | } |
| 1857 | |
| 1858 | static void dummy_stop (struct usb_hcd *hcd) |
| 1859 | { |
| 1860 | struct dummy *dum; |
| 1861 | |
| 1862 | dum = hcd_to_dummy (hcd); |
| 1863 | |
| 1864 | device_remove_file (dummy_dev(dum), &dev_attr_urbs); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1865 | usb_gadget_unregister_driver (dum->driver); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1866 | dev_info (dummy_dev(dum), "stopped\n"); |
| 1867 | } |
| 1868 | |
| 1869 | /*-------------------------------------------------------------------------*/ |
| 1870 | |
| 1871 | static int dummy_h_get_frame (struct usb_hcd *hcd) |
| 1872 | { |
| 1873 | return dummy_g_get_frame (NULL); |
| 1874 | } |
| 1875 | |
| 1876 | static const struct hc_driver dummy_hcd = { |
| 1877 | .description = (char *) driver_name, |
| 1878 | .product_desc = "Dummy host controller", |
| 1879 | .hcd_priv_size = sizeof(struct dummy), |
| 1880 | |
| 1881 | .flags = HCD_USB2, |
| 1882 | |
| 1883 | .start = dummy_start, |
| 1884 | .stop = dummy_stop, |
| 1885 | |
| 1886 | .urb_enqueue = dummy_urb_enqueue, |
| 1887 | .urb_dequeue = dummy_urb_dequeue, |
| 1888 | |
| 1889 | .get_frame_number = dummy_h_get_frame, |
| 1890 | |
| 1891 | .hub_status_data = dummy_hub_status, |
| 1892 | .hub_control = dummy_hub_control, |
Alan Stern | 0c0382e | 2005-10-13 17:08:02 -0400 | [diff] [blame] | 1893 | .bus_suspend = dummy_bus_suspend, |
| 1894 | .bus_resume = dummy_bus_resume, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1895 | }; |
| 1896 | |
Alan Stern | 8364d6b | 2005-11-14 12:16:30 -0500 | [diff] [blame] | 1897 | static int dummy_hcd_probe(struct platform_device *pdev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1898 | { |
| 1899 | struct usb_hcd *hcd; |
| 1900 | int retval; |
| 1901 | |
Alan Stern | 8364d6b | 2005-11-14 12:16:30 -0500 | [diff] [blame] | 1902 | dev_info(&pdev->dev, "%s, driver " DRIVER_VERSION "\n", driver_desc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1903 | |
Kay Sievers | 7071a3c | 2008-05-02 06:02:41 +0200 | [diff] [blame] | 1904 | hcd = usb_create_hcd(&dummy_hcd, &pdev->dev, dev_name(&pdev->dev)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1905 | if (!hcd) |
| 1906 | return -ENOMEM; |
| 1907 | the_controller = hcd_to_dummy (hcd); |
| 1908 | |
| 1909 | retval = usb_add_hcd(hcd, 0, 0); |
| 1910 | if (retval != 0) { |
| 1911 | usb_put_hcd (hcd); |
| 1912 | the_controller = NULL; |
| 1913 | } |
| 1914 | return retval; |
| 1915 | } |
| 1916 | |
Alan Stern | 8364d6b | 2005-11-14 12:16:30 -0500 | [diff] [blame] | 1917 | static int dummy_hcd_remove (struct platform_device *pdev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1918 | { |
| 1919 | struct usb_hcd *hcd; |
| 1920 | |
Alan Stern | 8364d6b | 2005-11-14 12:16:30 -0500 | [diff] [blame] | 1921 | hcd = platform_get_drvdata (pdev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1922 | usb_remove_hcd (hcd); |
| 1923 | usb_put_hcd (hcd); |
| 1924 | the_controller = NULL; |
Alan Stern | d9b7625 | 2005-05-03 16:15:43 -0400 | [diff] [blame] | 1925 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1926 | } |
| 1927 | |
Alan Stern | 8364d6b | 2005-11-14 12:16:30 -0500 | [diff] [blame] | 1928 | 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] | 1929 | { |
| 1930 | struct usb_hcd *hcd; |
Alan Stern | 3cf0a22 | 2005-11-29 12:08:15 -0500 | [diff] [blame] | 1931 | struct dummy *dum; |
| 1932 | int rc = 0; |
Alan Stern | 391eca9 | 2005-05-10 15:34:16 -0400 | [diff] [blame] | 1933 | |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 1934 | dev_dbg (&pdev->dev, "%s\n", __func__); |
Alan Stern | 391eca9 | 2005-05-10 15:34:16 -0400 | [diff] [blame] | 1935 | |
Alan Stern | 3cf0a22 | 2005-11-29 12:08:15 -0500 | [diff] [blame] | 1936 | hcd = platform_get_drvdata (pdev); |
| 1937 | dum = hcd_to_dummy (hcd); |
| 1938 | if (dum->rh_state == DUMMY_RH_RUNNING) { |
| 1939 | dev_warn(&pdev->dev, "Root hub isn't suspended!\n"); |
| 1940 | rc = -EBUSY; |
| 1941 | } else |
| 1942 | clear_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags); |
| 1943 | return rc; |
Alan Stern | 391eca9 | 2005-05-10 15:34:16 -0400 | [diff] [blame] | 1944 | } |
| 1945 | |
Alan Stern | 8364d6b | 2005-11-14 12:16:30 -0500 | [diff] [blame] | 1946 | static int dummy_hcd_resume (struct platform_device *pdev) |
Alan Stern | 391eca9 | 2005-05-10 15:34:16 -0400 | [diff] [blame] | 1947 | { |
| 1948 | struct usb_hcd *hcd; |
| 1949 | |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 1950 | dev_dbg (&pdev->dev, "%s\n", __func__); |
Alan Stern | 391eca9 | 2005-05-10 15:34:16 -0400 | [diff] [blame] | 1951 | |
Alan Stern | 3cf0a22 | 2005-11-29 12:08:15 -0500 | [diff] [blame] | 1952 | hcd = platform_get_drvdata (pdev); |
| 1953 | set_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags); |
Alan Stern | 391eca9 | 2005-05-10 15:34:16 -0400 | [diff] [blame] | 1954 | usb_hcd_poll_rh_status (hcd); |
| 1955 | return 0; |
| 1956 | } |
| 1957 | |
Russell King | 3ae5eae | 2005-11-09 22:32:44 +0000 | [diff] [blame] | 1958 | static struct platform_driver dummy_hcd_driver = { |
Alan Stern | d9b7625 | 2005-05-03 16:15:43 -0400 | [diff] [blame] | 1959 | .probe = dummy_hcd_probe, |
| 1960 | .remove = dummy_hcd_remove, |
Alan Stern | 391eca9 | 2005-05-10 15:34:16 -0400 | [diff] [blame] | 1961 | .suspend = dummy_hcd_suspend, |
| 1962 | .resume = dummy_hcd_resume, |
Russell King | 3ae5eae | 2005-11-09 22:32:44 +0000 | [diff] [blame] | 1963 | .driver = { |
| 1964 | .name = (char *) driver_name, |
| 1965 | .owner = THIS_MODULE, |
| 1966 | }, |
Alan Stern | d9b7625 | 2005-05-03 16:15:43 -0400 | [diff] [blame] | 1967 | }; |
| 1968 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1969 | /*-------------------------------------------------------------------------*/ |
| 1970 | |
Alan Stern | a89a2cd | 2008-04-07 15:03:25 -0400 | [diff] [blame] | 1971 | static struct platform_device *the_udc_pdev; |
| 1972 | static struct platform_device *the_hcd_pdev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1973 | |
| 1974 | static int __init init (void) |
| 1975 | { |
Alan Stern | a89a2cd | 2008-04-07 15:03:25 -0400 | [diff] [blame] | 1976 | int retval = -ENOMEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1977 | |
| 1978 | if (usb_disabled ()) |
| 1979 | return -ENODEV; |
Alan Stern | d9b7625 | 2005-05-03 16:15:43 -0400 | [diff] [blame] | 1980 | |
Alan Stern | a89a2cd | 2008-04-07 15:03:25 -0400 | [diff] [blame] | 1981 | the_hcd_pdev = platform_device_alloc(driver_name, -1); |
| 1982 | if (!the_hcd_pdev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1983 | return retval; |
Alan Stern | a89a2cd | 2008-04-07 15:03:25 -0400 | [diff] [blame] | 1984 | the_udc_pdev = platform_device_alloc(gadget_name, -1); |
| 1985 | if (!the_udc_pdev) |
| 1986 | goto err_alloc_udc; |
Alan Stern | d9b7625 | 2005-05-03 16:15:43 -0400 | [diff] [blame] | 1987 | |
Alan Stern | a89a2cd | 2008-04-07 15:03:25 -0400 | [diff] [blame] | 1988 | retval = platform_driver_register(&dummy_hcd_driver); |
| 1989 | if (retval < 0) |
| 1990 | goto err_register_hcd_driver; |
| 1991 | retval = platform_driver_register(&dummy_udc_driver); |
Alan Stern | d9b7625 | 2005-05-03 16:15:43 -0400 | [diff] [blame] | 1992 | if (retval < 0) |
| 1993 | goto err_register_udc_driver; |
| 1994 | |
Alan Stern | a89a2cd | 2008-04-07 15:03:25 -0400 | [diff] [blame] | 1995 | retval = platform_device_add(the_hcd_pdev); |
Alan Stern | d9b7625 | 2005-05-03 16:15:43 -0400 | [diff] [blame] | 1996 | if (retval < 0) |
Alan Stern | a89a2cd | 2008-04-07 15:03:25 -0400 | [diff] [blame] | 1997 | goto err_add_hcd; |
| 1998 | retval = platform_device_add(the_udc_pdev); |
Alan Stern | d9b7625 | 2005-05-03 16:15:43 -0400 | [diff] [blame] | 1999 | if (retval < 0) |
Alan Stern | a89a2cd | 2008-04-07 15:03:25 -0400 | [diff] [blame] | 2000 | goto err_add_udc; |
Alan Stern | d9b7625 | 2005-05-03 16:15:43 -0400 | [diff] [blame] | 2001 | return retval; |
| 2002 | |
Alan Stern | a89a2cd | 2008-04-07 15:03:25 -0400 | [diff] [blame] | 2003 | err_add_udc: |
| 2004 | platform_device_del(the_hcd_pdev); |
| 2005 | err_add_hcd: |
| 2006 | platform_driver_unregister(&dummy_udc_driver); |
Alan Stern | d9b7625 | 2005-05-03 16:15:43 -0400 | [diff] [blame] | 2007 | err_register_udc_driver: |
Alan Stern | a89a2cd | 2008-04-07 15:03:25 -0400 | [diff] [blame] | 2008 | platform_driver_unregister(&dummy_hcd_driver); |
| 2009 | err_register_hcd_driver: |
| 2010 | platform_device_put(the_udc_pdev); |
| 2011 | err_alloc_udc: |
| 2012 | platform_device_put(the_hcd_pdev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2013 | return retval; |
| 2014 | } |
| 2015 | module_init (init); |
| 2016 | |
| 2017 | static void __exit cleanup (void) |
| 2018 | { |
Alan Stern | a89a2cd | 2008-04-07 15:03:25 -0400 | [diff] [blame] | 2019 | platform_device_unregister(the_udc_pdev); |
| 2020 | platform_device_unregister(the_hcd_pdev); |
| 2021 | platform_driver_unregister(&dummy_udc_driver); |
| 2022 | platform_driver_unregister(&dummy_hcd_driver); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2023 | } |
| 2024 | module_exit (cleanup); |