1 /* $FreeBSD$ */ 2 /*- 3 * Copyright (c) 2008 Hans Petter Selasky. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 */ 26 27 #include "opt_ddb.h" 28 29 #include <sys/stdint.h> 30 #include <sys/stddef.h> 31 #include <sys/param.h> 32 #include <sys/queue.h> 33 #include <sys/types.h> 34 #include <sys/systm.h> 35 #include <sys/kernel.h> 36 #include <sys/bus.h> 37 #include <sys/module.h> 38 #include <sys/lock.h> 39 #include <sys/mutex.h> 40 #include <sys/condvar.h> 41 #include <sys/sysctl.h> 42 #include <sys/sx.h> 43 #include <sys/unistd.h> 44 #include <sys/callout.h> 45 #include <sys/malloc.h> 46 #include <sys/priv.h> 47 48 #include <dev/usb/usb.h> 49 #include <dev/usb/usbdi.h> 50 51 #define USB_DEBUG_VAR usb_ctrl_debug 52 53 #include <dev/usb/usb_core.h> 54 #include <dev/usb/usb_debug.h> 55 #include <dev/usb/usb_process.h> 56 #include <dev/usb/usb_busdma.h> 57 #include <dev/usb/usb_dynamic.h> 58 #include <dev/usb/usb_device.h> 59 #include <dev/usb/usb_hub.h> 60 61 #include <dev/usb/usb_controller.h> 62 #include <dev/usb/usb_bus.h> 63 #include <dev/usb/usb_pf.h> 64 65 /* function prototypes */ 66 67 static device_probe_t usb_probe; 68 static device_attach_t usb_attach; 69 static device_detach_t usb_detach; 70 71 static void usb_attach_sub(device_t, struct usb_bus *); 72 73 /* static variables */ 74 75 #ifdef USB_DEBUG 76 static int usb_ctrl_debug = 0; 77 78 SYSCTL_NODE(_hw_usb, OID_AUTO, ctrl, CTLFLAG_RW, 0, "USB controller"); 79 SYSCTL_INT(_hw_usb_ctrl, OID_AUTO, debug, CTLFLAG_RW, &usb_ctrl_debug, 0, 80 "Debug level"); 81 #endif 82 83 static int usb_no_boot_wait = 0; 84 TUNABLE_INT("hw.usb.no_boot_wait", &usb_no_boot_wait); 85 SYSCTL_INT(_hw_usb, OID_AUTO, no_boot_wait, CTLFLAG_RDTUN, &usb_no_boot_wait, 0, 86 "No device enumerate waiting at boot."); 87 88 static devclass_t usb_devclass; 89 90 static device_method_t usb_methods[] = { 91 DEVMETHOD(device_probe, usb_probe), 92 DEVMETHOD(device_attach, usb_attach), 93 DEVMETHOD(device_detach, usb_detach), 94 DEVMETHOD(device_suspend, bus_generic_suspend), 95 DEVMETHOD(device_resume, bus_generic_resume), 96 DEVMETHOD(device_shutdown, bus_generic_shutdown), 97 {0, 0} 98 }; 99 100 static driver_t usb_driver = { 101 .name = "usbus", 102 .methods = usb_methods, 103 .size = 0, 104 }; 105 106 /* Host Only Drivers */ 107 DRIVER_MODULE(usbus, ohci, usb_driver, usb_devclass, 0, 0); 108 DRIVER_MODULE(usbus, uhci, usb_driver, usb_devclass, 0, 0); 109 DRIVER_MODULE(usbus, ehci, usb_driver, usb_devclass, 0, 0); 110 DRIVER_MODULE(usbus, xhci, usb_driver, usb_devclass, 0, 0); 111 112 /* Device Only Drivers */ 113 DRIVER_MODULE(usbus, at91_udp, usb_driver, usb_devclass, 0, 0); 114 DRIVER_MODULE(usbus, musbotg, usb_driver, usb_devclass, 0, 0); 115 DRIVER_MODULE(usbus, uss820, usb_driver, usb_devclass, 0, 0); 116 117 /*------------------------------------------------------------------------* 118 * usb_probe 119 * 120 * This function is called from "{ehci,ohci,uhci}_pci_attach()". 121 *------------------------------------------------------------------------*/ 122 static int 123 usb_probe(device_t dev) 124 { 125 DPRINTF("\n"); 126 return (0); 127 } 128 129 static void 130 usb_root_mount_rel(struct usb_bus *bus) 131 { 132 if (bus->bus_roothold != NULL) { 133 DPRINTF("Releasing root mount hold %p\n", bus->bus_roothold); 134 root_mount_rel(bus->bus_roothold); 135 bus->bus_roothold = NULL; 136 } 137 } 138 139 /*------------------------------------------------------------------------* 140 * usb_attach 141 *------------------------------------------------------------------------*/ 142 static int 143 usb_attach(device_t dev) 144 { 145 struct usb_bus *bus = device_get_ivars(dev); 146 147 DPRINTF("\n"); 148 149 if (bus == NULL) { 150 device_printf(dev, "USB device has no ivars\n"); 151 return (ENXIO); 152 } 153 154 if (usb_no_boot_wait == 0) { 155 /* delay vfs_mountroot until the bus is explored */ 156 bus->bus_roothold = root_mount_hold(device_get_nameunit(dev)); 157 } 158 159 usb_attach_sub(dev, bus); 160 161 return (0); /* return success */ 162 } 163 164 /*------------------------------------------------------------------------* 165 * usb_detach 166 *------------------------------------------------------------------------*/ 167 static int 168 usb_detach(device_t dev) 169 { 170 struct usb_bus *bus = device_get_softc(dev); 171 172 DPRINTF("\n"); 173 174 if (bus == NULL) { 175 /* was never setup properly */ 176 return (0); 177 } 178 /* Stop power watchdog */ 179 usb_callout_drain(&bus->power_wdog); 180 181 /* Let the USB explore process detach all devices. */ 182 usb_root_mount_rel(bus); 183 184 USB_BUS_LOCK(bus); 185 if (usb_proc_msignal(&bus->explore_proc, 186 &bus->detach_msg[0], &bus->detach_msg[1])) { 187 /* ignore */ 188 } 189 /* Wait for detach to complete */ 190 191 usb_proc_mwait(&bus->explore_proc, 192 &bus->detach_msg[0], &bus->detach_msg[1]); 193 194 USB_BUS_UNLOCK(bus); 195 196 /* Get rid of USB callback processes */ 197 198 usb_proc_free(&bus->giant_callback_proc); 199 usb_proc_free(&bus->non_giant_callback_proc); 200 201 /* Get rid of USB explore process */ 202 203 usb_proc_free(&bus->explore_proc); 204 205 /* Get rid of control transfer process */ 206 207 usb_proc_free(&bus->control_xfer_proc); 208 209 #if USB_HAVE_PF 210 usbpf_detach(bus); 211 #endif 212 return (0); 213 } 214 215 /*------------------------------------------------------------------------* 216 * usb_bus_explore 217 * 218 * This function is used to explore the device tree from the root. 219 *------------------------------------------------------------------------*/ 220 static void 221 usb_bus_explore(struct usb_proc_msg *pm) 222 { 223 struct usb_bus *bus; 224 struct usb_device *udev; 225 226 bus = ((struct usb_bus_msg *)pm)->bus; 227 udev = bus->devices[USB_ROOT_HUB_ADDR]; 228 229 if (udev && udev->hub) { 230 231 if (bus->do_probe) { 232 bus->do_probe = 0; 233 bus->driver_added_refcount++; 234 } 235 if (bus->driver_added_refcount == 0) { 236 /* avoid zero, hence that is memory default */ 237 bus->driver_added_refcount = 1; 238 } 239 240 #ifdef DDB 241 /* 242 * The following three lines of code are only here to 243 * recover from DDB: 244 */ 245 usb_proc_rewakeup(&bus->control_xfer_proc); 246 usb_proc_rewakeup(&bus->giant_callback_proc); 247 usb_proc_rewakeup(&bus->non_giant_callback_proc); 248 #endif 249 250 USB_BUS_UNLOCK(bus); 251 252 #if USB_HAVE_POWERD 253 /* 254 * First update the USB power state! 255 */ 256 usb_bus_powerd(bus); 257 #endif 258 /* Explore the Root USB HUB. */ 259 (udev->hub->explore) (udev); 260 USB_BUS_LOCK(bus); 261 } 262 usb_root_mount_rel(bus); 263 } 264 265 /*------------------------------------------------------------------------* 266 * usb_bus_detach 267 * 268 * This function is used to detach the device tree from the root. 269 *------------------------------------------------------------------------*/ 270 static void 271 usb_bus_detach(struct usb_proc_msg *pm) 272 { 273 struct usb_bus *bus; 274 struct usb_device *udev; 275 device_t dev; 276 277 bus = ((struct usb_bus_msg *)pm)->bus; 278 udev = bus->devices[USB_ROOT_HUB_ADDR]; 279 dev = bus->bdev; 280 /* clear the softc */ 281 device_set_softc(dev, NULL); 282 USB_BUS_UNLOCK(bus); 283 284 /* detach children first */ 285 mtx_lock(&Giant); 286 bus_generic_detach(dev); 287 mtx_unlock(&Giant); 288 289 /* 290 * Free USB device and all subdevices, if any. 291 */ 292 usb_free_device(udev, 0); 293 294 USB_BUS_LOCK(bus); 295 /* clear bdev variable last */ 296 bus->bdev = NULL; 297 } 298 299 static void 300 usb_power_wdog(void *arg) 301 { 302 struct usb_bus *bus = arg; 303 304 USB_BUS_LOCK_ASSERT(bus, MA_OWNED); 305 306 usb_callout_reset(&bus->power_wdog, 307 4 * hz, usb_power_wdog, arg); 308 309 #ifdef DDB 310 /* 311 * The following line of code is only here to recover from 312 * DDB: 313 */ 314 usb_proc_rewakeup(&bus->explore_proc); /* recover from DDB */ 315 #endif 316 317 #if USB_HAVE_POWERD 318 USB_BUS_UNLOCK(bus); 319 320 usb_bus_power_update(bus); 321 322 USB_BUS_LOCK(bus); 323 #endif 324 } 325 326 /*------------------------------------------------------------------------* 327 * usb_bus_attach 328 * 329 * This function attaches USB in context of the explore thread. 330 *------------------------------------------------------------------------*/ 331 static void 332 usb_bus_attach(struct usb_proc_msg *pm) 333 { 334 struct usb_bus *bus; 335 struct usb_device *child; 336 device_t dev; 337 usb_error_t err; 338 enum usb_dev_speed speed; 339 340 bus = ((struct usb_bus_msg *)pm)->bus; 341 dev = bus->bdev; 342 343 DPRINTF("\n"); 344 345 switch (bus->usbrev) { 346 case USB_REV_1_0: 347 speed = USB_SPEED_FULL; 348 device_printf(bus->bdev, "12Mbps Full Speed USB v1.0\n"); 349 break; 350 351 case USB_REV_1_1: 352 speed = USB_SPEED_FULL; 353 device_printf(bus->bdev, "12Mbps Full Speed USB v1.1\n"); 354 break; 355 356 case USB_REV_2_0: 357 speed = USB_SPEED_HIGH; 358 device_printf(bus->bdev, "480Mbps High Speed USB v2.0\n"); 359 break; 360 361 case USB_REV_2_5: 362 speed = USB_SPEED_VARIABLE; 363 device_printf(bus->bdev, "480Mbps Wireless USB v2.5\n"); 364 break; 365 366 case USB_REV_3_0: 367 speed = USB_SPEED_SUPER; 368 device_printf(bus->bdev, "5.0Gbps Super Speed USB v3.0\n"); 369 break; 370 371 default: 372 device_printf(bus->bdev, "Unsupported USB revision\n"); 373 usb_root_mount_rel(bus); 374 return; 375 } 376 377 USB_BUS_UNLOCK(bus); 378 379 /* default power_mask value */ 380 bus->hw_power_state = 381 USB_HW_POWER_CONTROL | 382 USB_HW_POWER_BULK | 383 USB_HW_POWER_INTERRUPT | 384 USB_HW_POWER_ISOC | 385 USB_HW_POWER_NON_ROOT_HUB; 386 387 /* make sure power is set at least once */ 388 389 if (bus->methods->set_hw_power != NULL) { 390 (bus->methods->set_hw_power) (bus); 391 } 392 393 /* Allocate the Root USB device */ 394 395 child = usb_alloc_device(bus->bdev, bus, NULL, 0, 0, 1, 396 speed, USB_MODE_HOST); 397 if (child) { 398 err = usb_probe_and_attach(child, 399 USB_IFACE_INDEX_ANY); 400 if (!err) { 401 if ((bus->devices[USB_ROOT_HUB_ADDR] == NULL) || 402 (bus->devices[USB_ROOT_HUB_ADDR]->hub == NULL)) { 403 err = USB_ERR_NO_ROOT_HUB; 404 } 405 } 406 } else { 407 err = USB_ERR_NOMEM; 408 } 409 410 USB_BUS_LOCK(bus); 411 412 if (err) { 413 device_printf(bus->bdev, "Root HUB problem, error=%s\n", 414 usbd_errstr(err)); 415 usb_root_mount_rel(bus); 416 } 417 418 /* set softc - we are ready */ 419 device_set_softc(dev, bus); 420 421 /* start watchdog */ 422 usb_power_wdog(bus); 423 } 424 425 /*------------------------------------------------------------------------* 426 * usb_attach_sub 427 * 428 * This function creates a thread which runs the USB attach code. 429 *------------------------------------------------------------------------*/ 430 static void 431 usb_attach_sub(device_t dev, struct usb_bus *bus) 432 { 433 const char *pname = device_get_nameunit(dev); 434 435 mtx_lock(&Giant); 436 if (usb_devclass_ptr == NULL) 437 usb_devclass_ptr = devclass_find("usbus"); 438 mtx_unlock(&Giant); 439 440 #if USB_HAVE_PF 441 usbpf_attach(bus); 442 #endif 443 /* Initialise USB process messages */ 444 bus->explore_msg[0].hdr.pm_callback = &usb_bus_explore; 445 bus->explore_msg[0].bus = bus; 446 bus->explore_msg[1].hdr.pm_callback = &usb_bus_explore; 447 bus->explore_msg[1].bus = bus; 448 449 bus->detach_msg[0].hdr.pm_callback = &usb_bus_detach; 450 bus->detach_msg[0].bus = bus; 451 bus->detach_msg[1].hdr.pm_callback = &usb_bus_detach; 452 bus->detach_msg[1].bus = bus; 453 454 bus->attach_msg[0].hdr.pm_callback = &usb_bus_attach; 455 bus->attach_msg[0].bus = bus; 456 bus->attach_msg[1].hdr.pm_callback = &usb_bus_attach; 457 bus->attach_msg[1].bus = bus; 458 459 /* Create USB explore and callback processes */ 460 461 if (usb_proc_create(&bus->giant_callback_proc, 462 &bus->bus_mtx, pname, USB_PRI_MED)) { 463 device_printf(dev, "WARNING: Creation of USB Giant " 464 "callback process failed.\n"); 465 } else if (usb_proc_create(&bus->non_giant_callback_proc, 466 &bus->bus_mtx, pname, USB_PRI_HIGH)) { 467 device_printf(dev, "WARNING: Creation of USB non-Giant " 468 "callback process failed.\n"); 469 } else if (usb_proc_create(&bus->explore_proc, 470 &bus->bus_mtx, pname, USB_PRI_MED)) { 471 device_printf(dev, "WARNING: Creation of USB explore " 472 "process failed.\n"); 473 } else if (usb_proc_create(&bus->control_xfer_proc, 474 &bus->bus_mtx, pname, USB_PRI_MED)) { 475 device_printf(dev, "WARNING: Creation of USB control transfer " 476 "process failed.\n"); 477 } else { 478 /* Get final attach going */ 479 USB_BUS_LOCK(bus); 480 if (usb_proc_msignal(&bus->explore_proc, 481 &bus->attach_msg[0], &bus->attach_msg[1])) { 482 /* ignore */ 483 } 484 USB_BUS_UNLOCK(bus); 485 486 /* Do initial explore */ 487 usb_needs_explore(bus, 1); 488 } 489 } 490 491 SYSUNINIT(usb_bus_unload, SI_SUB_KLD, SI_ORDER_ANY, usb_bus_unload, NULL); 492 493 /*------------------------------------------------------------------------* 494 * usb_bus_mem_flush_all_cb 495 *------------------------------------------------------------------------*/ 496 #if USB_HAVE_BUSDMA 497 static void 498 usb_bus_mem_flush_all_cb(struct usb_bus *bus, struct usb_page_cache *pc, 499 struct usb_page *pg, usb_size_t size, usb_size_t align) 500 { 501 usb_pc_cpu_flush(pc); 502 } 503 #endif 504 505 /*------------------------------------------------------------------------* 506 * usb_bus_mem_flush_all - factored out code 507 *------------------------------------------------------------------------*/ 508 #if USB_HAVE_BUSDMA 509 void 510 usb_bus_mem_flush_all(struct usb_bus *bus, usb_bus_mem_cb_t *cb) 511 { 512 if (cb) { 513 cb(bus, &usb_bus_mem_flush_all_cb); 514 } 515 } 516 #endif 517 518 /*------------------------------------------------------------------------* 519 * usb_bus_mem_alloc_all_cb 520 *------------------------------------------------------------------------*/ 521 #if USB_HAVE_BUSDMA 522 static void 523 usb_bus_mem_alloc_all_cb(struct usb_bus *bus, struct usb_page_cache *pc, 524 struct usb_page *pg, usb_size_t size, usb_size_t align) 525 { 526 /* need to initialize the page cache */ 527 pc->tag_parent = bus->dma_parent_tag; 528 529 if (usb_pc_alloc_mem(pc, pg, size, align)) { 530 bus->alloc_failed = 1; 531 } 532 } 533 #endif 534 535 /*------------------------------------------------------------------------* 536 * usb_bus_mem_alloc_all - factored out code 537 * 538 * Returns: 539 * 0: Success 540 * Else: Failure 541 *------------------------------------------------------------------------*/ 542 uint8_t 543 usb_bus_mem_alloc_all(struct usb_bus *bus, bus_dma_tag_t dmat, 544 usb_bus_mem_cb_t *cb) 545 { 546 bus->alloc_failed = 0; 547 548 mtx_init(&bus->bus_mtx, device_get_nameunit(bus->parent), 549 NULL, MTX_DEF | MTX_RECURSE); 550 551 usb_callout_init_mtx(&bus->power_wdog, 552 &bus->bus_mtx, 0); 553 554 TAILQ_INIT(&bus->intr_q.head); 555 556 #if USB_HAVE_BUSDMA 557 usb_dma_tag_setup(bus->dma_parent_tag, bus->dma_tags, 558 dmat, &bus->bus_mtx, NULL, 32, USB_BUS_DMA_TAG_MAX); 559 #endif 560 if ((bus->devices_max > USB_MAX_DEVICES) || 561 (bus->devices_max < USB_MIN_DEVICES) || 562 (bus->devices == NULL)) { 563 DPRINTFN(0, "Devices field has not been " 564 "initialised properly\n"); 565 bus->alloc_failed = 1; /* failure */ 566 } 567 #if USB_HAVE_BUSDMA 568 if (cb) { 569 cb(bus, &usb_bus_mem_alloc_all_cb); 570 } 571 #endif 572 if (bus->alloc_failed) { 573 usb_bus_mem_free_all(bus, cb); 574 } 575 return (bus->alloc_failed); 576 } 577 578 /*------------------------------------------------------------------------* 579 * usb_bus_mem_free_all_cb 580 *------------------------------------------------------------------------*/ 581 #if USB_HAVE_BUSDMA 582 static void 583 usb_bus_mem_free_all_cb(struct usb_bus *bus, struct usb_page_cache *pc, 584 struct usb_page *pg, usb_size_t size, usb_size_t align) 585 { 586 usb_pc_free_mem(pc); 587 } 588 #endif 589 590 /*------------------------------------------------------------------------* 591 * usb_bus_mem_free_all - factored out code 592 *------------------------------------------------------------------------*/ 593 void 594 usb_bus_mem_free_all(struct usb_bus *bus, usb_bus_mem_cb_t *cb) 595 { 596 #if USB_HAVE_BUSDMA 597 if (cb) { 598 cb(bus, &usb_bus_mem_free_all_cb); 599 } 600 usb_dma_tag_unsetup(bus->dma_parent_tag); 601 #endif 602 603 mtx_destroy(&bus->bus_mtx); 604 } 605 606