hw/usb/host-bsd.c

   1 /*
   2  * BSD host USB redirector
   3  *
   4  * Copyright (c) 2006 Lonnie Mendez
   5  * Portions of code and concepts borrowed from
   6  * usb-linux.c and libusb's bsd.c and are copyright their respective owners.
   7  *
   8  * Permission is hereby granted, free of charge, to any person obtaining a copy
   9  * of this software and associated documentation files (the "Software"), to deal
  10  * in the Software without restriction, including without limitation the rights
  11  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  12  * copies of the Software, and to permit persons to whom the Software is
  13  * furnished to do so, subject to the following conditions:
  14  *
  15  * The above copyright notice and this permission notice shall be included in
  16  * all copies or substantial portions of the Software.
  17  *
  18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  19  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  20  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
  21  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  22  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  23  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  24  * THE SOFTWARE.
  25  */
  26
  27 #include "qemu-common.h"
  28 #include "monitor/monitor.h"
  29 #include "hw/usb.h"
  30
  31 /* usb.h declares these */
  32 #undef USB_SPEED_HIGH
  33 #undef USB_SPEED_FULL
  34 #undef USB_SPEED_LOW
  35
  36 #include <sys/ioctl.h>
  37 #ifndef __DragonFly__
  38 #include <dev/usb/usb.h>
  39 #else
  40 #include <bus/usb/usb.h>
  41 #endif
  42
  43 /* This value has maximum potential at 16.
  44  * You should also set hw.usb.debug to gain
  45  * more detailed view.
  46  */
  47 //#define DEBUG
  48 #define UGEN_DEBUG_LEVEL 0
  49
  50
  51 typedef int USBScanFunc(void *opaque, int bus_num, int addr, int class_id,
  52                         int vendor_id, int product_id,
  53                         const char *product_name, int speed);
  54 static int usb_host_find_device(int *pbus_num, int *paddr,
  55                                 const char *devname);
  56
  57 typedef struct USBHostDevice {
  58     USBDevice dev;
  59     int ep_fd[USB_MAX_ENDPOINTS];
  60     int devfd;
  61     char devpath[32];
  62 } USBHostDevice;
  63
  64
  65 static int ensure_ep_open(USBHostDevice *dev, int ep, int mode)
  66 {
  67     char buf[32];
  68     int fd;
  69
  70     /* Get the address for this endpoint */
  71     ep = UE_GET_ADDR(ep);
  72
  73     if (dev->ep_fd[ep] < 0) {
  74 #if defined(__FreeBSD__) || defined(__DragonFly__)
  75         snprintf(buf, sizeof(buf) - 1, "%s.%d", dev->devpath, ep);
  76 #else
  77         snprintf(buf, sizeof(buf) - 1, "%s.%02d", dev->devpath, ep);
  78 #endif
  79         /* Try to open it O_RDWR first for those devices which have in and out
  80          * endpoints with the same address (eg 0x02 and 0x82)
  81          */
  82         fd = open(buf, O_RDWR);
  83         if (fd < 0 && errno == ENXIO)
  84             fd = open(buf, mode);
  85         if (fd < 0) {
  86 #ifdef DEBUG
  87             printf("ensure_ep_open: failed to open device endpoint %s: %s\n",
  88                    buf, strerror(errno));
  89 #endif
  90         }
  91         dev->ep_fd[ep] = fd;
  92     }
  93
  94     return dev->ep_fd[ep];
  95 }
  96
  97 static void ensure_eps_closed(USBHostDevice *dev)
  98 {
  99     int epnum = 1;
 100
 101     if (!dev)
 102         return;
 103
 104     while (epnum < USB_MAX_ENDPOINTS) {
 105         if (dev->ep_fd[epnum] >= 0) {
 106             close(dev->ep_fd[epnum]);
 107             dev->ep_fd[epnum] = -1;
 108         }
 109         epnum++;
 110     }
 111 }
 112
 113 static void usb_host_handle_reset(USBDevice *dev)
 114 {
 115 #if 0
 116     USBHostDevice *s = (USBHostDevice *)dev;
 117 #endif
 118 }
 119
 120 /* XXX:
 121  * -check device states against transfer requests
 122  *  and return appropriate response
 123  */
 124 static void usb_host_handle_control(USBDevice *dev,
 125                                    USBPacket *p,
 126                                    int request,
 127                                    int value,
 128                                    int index,
 129                                    int length,
 130                                    uint8_t *data)
 131 {
 132     USBHostDevice *s = (USBHostDevice *)dev;
 133     struct usb_ctl_request req;
 134     struct usb_alt_interface aiface;
 135     int ret, timeout = 50;
 136
 137     if ((request >> 8) == UT_WRITE_DEVICE &&
 138         (request & 0xff) == UR_SET_ADDRESS) {
 139
 140         /* specific SET_ADDRESS support */
 141         dev->addr = value;
 142     } else if ((request >> 8) == UT_WRITE_DEVICE &&
 143                (request & 0xff) == UR_SET_CONFIG) {
 144
 145         ensure_eps_closed(s); /* can't do this without all eps closed */
 146
 147         ret = ioctl(s->devfd, USB_SET_CONFIG, &value);
 148         if (ret < 0) {
 149 #ifdef DEBUG
 150             printf("handle_control: failed to set configuration - %s\n",
 151                    strerror(errno));
 152 #endif
 153             p->status = USB_RET_STALL;
 154         }
 155     } else if ((request >> 8) == UT_WRITE_INTERFACE &&
 156                (request & 0xff) == UR_SET_INTERFACE) {
 157
 158         aiface.uai_interface_index = index;
 159         aiface.uai_alt_no = value;
 160
 161         ensure_eps_closed(s); /* can't do this without all eps closed */
 162         ret = ioctl(s->devfd, USB_SET_ALTINTERFACE, &aiface);
 163         if (ret < 0) {
 164 #ifdef DEBUG
 165             printf("handle_control: failed to set alternate interface - %s\n",
 166                    strerror(errno));
 167 #endif
 168             p->status = USB_RET_STALL;
 169         }
 170     } else {
 171         req.ucr_request.bmRequestType = request >> 8;
 172         req.ucr_request.bRequest = request & 0xff;
 173         USETW(req.ucr_request.wValue, value);
 174         USETW(req.ucr_request.wIndex, index);
 175         USETW(req.ucr_request.wLength, length);
 176         req.ucr_data = data;
 177         req.ucr_flags = USBD_SHORT_XFER_OK;
 178
 179         ret = ioctl(s->devfd, USB_SET_TIMEOUT, &timeout);
 180 #if defined(__NetBSD__) || defined(__OpenBSD__)
 181         if (ret < 0 && errno != EINVAL) {
 182 #else
 183         if (ret < 0) {
 184 #endif
 185 #ifdef DEBUG
 186             printf("handle_control: setting timeout failed - %s\n",
 187                    strerror(errno));
 188 #endif
 189         }
 190
 191         ret = ioctl(s->devfd, USB_DO_REQUEST, &req);
 192         /* ugen returns EIO for usbd_do_request_ no matter what
 193          * happens with the transfer */
 194         if (ret < 0) {
 195 #ifdef DEBUG
 196             printf("handle_control: error after request - %s\n",
 197                    strerror(errno));
 198 #endif
 199             p->status = USB_RET_NAK; /* STALL */
 200         } else {
 201             p->actual_length = req.ucr_actlen;
 202         }
 203     }
 204 }
 205
 206 static void usb_host_handle_data(USBDevice *dev, USBPacket *p)
 207 {
 208     USBHostDevice *s = (USBHostDevice *)dev;
 209     int ret, fd, mode;
 210     int one = 1, shortpacket = 0, timeout = 50;
 211     sigset_t new_mask, old_mask;
 212     uint8_t devep = p->ep->nr;
 213
 214     /* protect data transfers from SIGALRM signal */
 215     sigemptyset(&new_mask);
 216     sigaddset(&new_mask, SIGALRM);
 217     sigprocmask(SIG_BLOCK, &new_mask, &old_mask);
 218
 219     if (p->pid == USB_TOKEN_IN) {
 220         devep |= 0x80;
 221         mode = O_RDONLY;
 222         shortpacket = 1;
 223     } else {
 224         mode = O_WRONLY;
 225     }
 226
 227     fd = ensure_ep_open(s, devep, mode);
 228     if (fd < 0) {
 229         sigprocmask(SIG_SETMASK, &old_mask, NULL);
 230         p->status = USB_RET_NODEV;
 231         return;
 232     }
 233
 234     if (ioctl(fd, USB_SET_TIMEOUT, &timeout) < 0) {
 235 #ifdef DEBUG
 236         printf("handle_data: failed to set timeout - %s\n",
 237                strerror(errno));
 238 #endif
 239     }
 240
 241     if (shortpacket) {
 242         if (ioctl(fd, USB_SET_SHORT_XFER, &one) < 0) {
 243 #ifdef DEBUG
 244             printf("handle_data: failed to set short xfer mode - %s\n",
 245                    strerror(errno));
 246 #endif
 247             sigprocmask(SIG_SETMASK, &old_mask, NULL);
 248         }
 249     }
 250
 251     if (p->pid == USB_TOKEN_IN)
 252         ret = readv(fd, p->iov.iov, p->iov.niov);
 253     else
 254         ret = writev(fd, p->iov.iov, p->iov.niov);
 255
 256     sigprocmask(SIG_SETMASK, &old_mask, NULL);
 257
 258     if (ret < 0) {
 259 #ifdef DEBUG
 260         printf("handle_data: error after %s data - %s\n",
 261                pid == USB_TOKEN_IN ? "reading" : "writing", strerror(errno));
 262 #endif
 263         switch(errno) {
 264         case ETIMEDOUT:
 265         case EINTR:
 266             p->status = USB_RET_NAK;
 267             break;
 268         default:
 269             p->status = USB_RET_STALL;
 270         }
 271     } else {
 272         p->actual_length = ret;
 273     }
 274 }
 275
 276 static void usb_host_handle_destroy(USBDevice *opaque)
 277 {
 278     USBHostDevice *s = (USBHostDevice *)opaque;
 279     int i;
 280
 281     for (i = 0; i < USB_MAX_ENDPOINTS; i++)
 282         if (s->ep_fd[i] >= 0)
 283             close(s->ep_fd[i]);
 284
 285     if (s->devfd < 0)
 286         return;
 287
 288     close(s->devfd);
 289
 290     g_free(s);
 291 }
 292
 293 static int usb_host_initfn(USBDevice *dev)
 294 {
 295     dev->flags |= (1 << USB_DEV_FLAG_IS_HOST);
 296     return 0;
 297 }
 298
 299 USBDevice *usb_host_device_open(USBBus *guest_bus, const char *devname)
 300 {
 301     struct usb_device_info bus_info, dev_info;
 302     USBDevice *d = NULL, *ret = NULL;
 303     USBHostDevice *dev;
 304     char ctlpath[PATH_MAX + 1];
 305     char buspath[PATH_MAX + 1];
 306     int bfd, dfd, bus, address, i;
 307     int ugendebug = UGEN_DEBUG_LEVEL;
 308
 309     if (usb_host_find_device(&bus, &address, devname) < 0) {
 310         goto fail;
 311     }
 312
 313     snprintf(buspath, PATH_MAX, "/dev/usb%d", bus);
 314
 315     bfd = open(buspath, O_RDWR);
 316     if (bfd < 0) {
 317 #ifdef DEBUG
 318         printf("usb_host_device_open: failed to open usb bus - %s\n",
 319                strerror(errno));
 320 #endif
 321         goto fail;
 322     }
 323
 324     bus_info.udi_addr = address;
 325     if (ioctl(bfd, USB_DEVICEINFO, &bus_info) < 0) {
 326 #ifdef DEBUG
 327         printf("usb_host_device_open: failed to grab bus information - %s\n",
 328                strerror(errno));
 329 #endif
 330         goto fail_bfd;
 331     }
 332
 333 #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || defined(__DragonFly__)
 334     snprintf(ctlpath, PATH_MAX, "/dev/%s", bus_info.udi_devnames[0]);
 335 #else
 336     snprintf(ctlpath, PATH_MAX, "/dev/%s.00", bus_info.udi_devnames[0]);
 337 #endif
 338
 339     dfd  = open(ctlpath, O_RDWR);
 340     if (dfd < 0) {
 341         dfd = open(ctlpath, O_RDONLY);
 342         if (dfd < 0) {
 343 #ifdef DEBUG
 344             printf("usb_host_device_open: failed to open usb device %s - %s\n",
 345                    ctlpath, strerror(errno));
 346 #endif
 347         }
 348         goto fail_dfd;
 349     }
 350
 351     if (ioctl(dfd, USB_GET_DEVICEINFO, &dev_info) < 0) {
 352 #ifdef DEBUG
 353         printf("usb_host_device_open: failed to grab device info - %s\n",
 354                strerror(errno));
 355 #endif
 356         goto fail_dfd;
 357     }
 358
 359     d = usb_create(guest_bus, "usb-host");
 360     dev = DO_UPCAST(USBHostDevice, dev, d);
 361
 362     if (dev_info.udi_speed == 1) {
 363         dev->dev.speed = USB_SPEED_LOW - 1;
 364         dev->dev.speedmask = USB_SPEED_MASK_LOW;
 365     } else {
 366         dev->dev.speed = USB_SPEED_FULL - 1;
 367         dev->dev.speedmask = USB_SPEED_MASK_FULL;
 368     }
 369
 370     if (strncmp(dev_info.udi_product, "product", 7) != 0) {
 371         pstrcpy(dev->dev.product_desc, sizeof(dev->dev.product_desc),
 372                 dev_info.udi_product);
 373     } else {
 374         snprintf(dev->dev.product_desc, sizeof(dev->dev.product_desc),
 375                  "host:%s", devname);
 376     }
 377
 378     pstrcpy(dev->devpath, sizeof(dev->devpath), "/dev/");
 379     pstrcat(dev->devpath, sizeof(dev->devpath), dev_info.udi_devnames[0]);
 380
 381     /* Mark the endpoints as not yet open */
 382     for (i = 0; i < USB_MAX_ENDPOINTS; i++) {
 383         dev->ep_fd[i] = -1;
 384     }
 385
 386     ioctl(dfd, USB_SETDEBUG, &ugendebug);
 387
 388     ret = (USBDevice *)dev;
 389
 390 fail_dfd:
 391     close(dfd);
 392 fail_bfd:
 393     close(bfd);
 394 fail:
 395     return ret;
 396 }
 397
 398 static void usb_host_class_initfn(ObjectClass *klass, void *data)
 399 {
 400     USBDeviceClass *uc = USB_DEVICE_CLASS(klass);
 401
 402     uc->product_desc   = "USB Host Device";
 403     uc->init           = usb_host_initfn;
 404     uc->handle_reset   = usb_host_handle_reset;
 405     uc->handle_control = usb_host_handle_control;
 406     uc->handle_data    = usb_host_handle_data;
 407     uc->handle_destroy = usb_host_handle_destroy;
 408 }
 409
 410 static const TypeInfo usb_host_dev_info = {
 411     .name          = "usb-host",
 412     .parent        = TYPE_USB_DEVICE,
 413     .instance_size = sizeof(USBHostDevice),
 414     .class_init    = usb_host_class_initfn,
 415 };
 416
 417 static void usb_host_register_types(void)
 418 {
 419     type_register_static(&usb_host_dev_info);
 420 }
 421
 422 type_init(usb_host_register_types)
 423
 424 static int usb_host_scan(void *opaque, USBScanFunc *func)
 425 {
 426     struct usb_device_info bus_info;
 427     struct usb_device_info dev_info;
 428     uint16_t vendor_id, product_id, class_id, speed;
 429     int bfd, dfd, bus, address;
 430     char busbuf[20], devbuf[20], product_name[256];
 431     int ret = 0;
 432
 433     for (bus = 0; bus < 10; bus++) {
 434
 435         snprintf(busbuf, sizeof(busbuf) - 1, "/dev/usb%d", bus);
 436         bfd = open(busbuf, O_RDWR);
 437         if (bfd < 0)
 438             continue;
 439
 440         for (address = 1; address < 127; address++) {
 441
 442             bus_info.udi_addr = address;
 443             if (ioctl(bfd, USB_DEVICEINFO, &bus_info) < 0)
 444                 continue;
 445
 446             /* only list devices that can be used by generic layer */
 447             if (strncmp(bus_info.udi_devnames[0], "ugen", 4) != 0)
 448                 continue;
 449
 450 #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || defined(__DragonFly__)
 451             snprintf(devbuf, sizeof(devbuf) - 1, "/dev/%s", bus_info.udi_devnames[0]);
 452 #else
 453             snprintf(devbuf, sizeof(devbuf) - 1, "/dev/%s.00", bus_info.udi_devnames[0]);
 454 #endif
 455
 456             dfd = open(devbuf, O_RDONLY);
 457             if (dfd < 0) {
 458 #ifdef DEBUG
 459                 printf("usb_host_scan: couldn't open device %s - %s\n", devbuf,
 460                        strerror(errno));
 461 #endif
 462                 continue;
 463             }
 464
 465             if (ioctl(dfd, USB_GET_DEVICEINFO, &dev_info) < 0)
 466                 printf("usb_host_scan: couldn't get device information for %s - %s\n",
 467                        devbuf, strerror(errno));
 468
 469             /* XXX: might need to fixup endianness of word values before copying over */
 470
 471             vendor_id = dev_info.udi_vendorNo;
 472             product_id = dev_info.udi_productNo;
 473             class_id = dev_info.udi_class;
 474             speed = dev_info.udi_speed;
 475
 476             if (strncmp(dev_info.udi_product, "product", 7) != 0)
 477                 pstrcpy(product_name, sizeof(product_name),
 478                         dev_info.udi_product);
 479             else
 480                 product_name[0] = '\0';
 481
 482             ret = func(opaque, bus, address, class_id, vendor_id,
 483                        product_id, product_name, speed);
 484
 485             close(dfd);
 486
 487             if (ret)
 488                 goto the_end;
 489         }
 490
 491         close(bfd);
 492     }
 493
 494 the_end:
 495     return ret;
 496 }
 497
 498 typedef struct FindDeviceState {
 499     int vendor_id;
 500     int product_id;
 501     int bus_num;
 502     int addr;
 503 } FindDeviceState;
 504
 505 static int usb_host_find_device_scan(void *opaque, int bus_num, int addr,
 506                                      int class_id,
 507                                      int vendor_id, int product_id,
 508                                      const char *product_name, int speed)
 509 {
 510     FindDeviceState *s = opaque;
 511     if (vendor_id == s->vendor_id &&
 512         product_id == s->product_id) {
 513         s->bus_num = bus_num;
 514         s->addr = addr;
 515         return 1;
 516      } else {
 517         return 0;
 518      }
 519 }
 520
 521
 522 /* the syntax is :
 523    'bus.addr' (decimal numbers) or
 524    'vendor_id:product_id' (hexa numbers) */
 525 static int usb_host_find_device(int *pbus_num, int *paddr,
 526                                 const char *devname)
 527 {
 528     const char *p;
 529     int ret;
 530     FindDeviceState fs;
 531
 532     p = strchr(devname, '.');
 533     if (p) {
 534         *pbus_num = strtoul(devname, NULL, 0);
 535         *paddr = strtoul(p + 1, NULL, 0);
 536         return 0;
 537     }
 538     p = strchr(devname, ':');
 539     if (p) {
 540         fs.vendor_id = strtoul(devname, NULL, 16);
 541         fs.product_id = strtoul(p + 1, NULL, 16);
 542         ret = usb_host_scan(&fs, usb_host_find_device_scan);
 543         if (ret) {
 544             *pbus_num = fs.bus_num;
 545             *paddr = fs.addr;
 546             return 0;
 547         }
 548      }
 549      return -1;
 550 }
 551
 552 /**********************/
 553 /* USB host device info */
 554
 555 struct usb_class_info {
 556     int class;
 557     const char *class_name;
 558 };
 559
 560 static const struct usb_class_info usb_class_info[] = {
 561     { USB_CLASS_AUDIO, "Audio"},
 562     { USB_CLASS_COMM, "Communication"},
 563     { USB_CLASS_HID, "HID"},
 564     { USB_CLASS_HUB, "Hub" },
 565     { USB_CLASS_PHYSICAL, "Physical" },
 566     { USB_CLASS_PRINTER, "Printer" },
 567     { USB_CLASS_MASS_STORAGE, "Storage" },
 568     { USB_CLASS_CDC_DATA, "Data" },
 569     { USB_CLASS_APP_SPEC, "Application Specific" },
 570     { USB_CLASS_VENDOR_SPEC, "Vendor Specific" },
 571     { USB_CLASS_STILL_IMAGE, "Still Image" },
 572     { USB_CLASS_CSCID, "Smart Card" },
 573     { USB_CLASS_CONTENT_SEC, "Content Security" },
 574     { -1, NULL }
 575 };
 576
 577 static const char *usb_class_str(uint8_t class)
 578 {
 579     const struct usb_class_info *p;
 580     for (p = usb_class_info; p->class != -1; p++) {
 581         if (p->class == class)
 582             break;
 583     }
 584     return p->class_name;
 585 }
 586
 587 static void usb_info_device(Monitor *mon, int bus_num, int addr, int class_id,
 588                             int vendor_id, int product_id,
 589                             const char *product_name,
 590                             int speed)
 591 {
 592     const char *class_str, *speed_str;
 593
 594     switch(speed) {
 595     case USB_SPEED_LOW:
 596         speed_str = "1.5";
 597         break;
 598     case USB_SPEED_FULL:
 599         speed_str = "12";
 600         break;
 601     case USB_SPEED_HIGH:
 602         speed_str = "480";
 603         break;
 604     default:
 605         speed_str = "?";
 606         break;
 607     }
 608
 609     monitor_printf(mon, "  Device %d.%d, speed %s Mb/s\n",
 610                    bus_num, addr, speed_str);
 611     class_str = usb_class_str(class_id);
 612     if (class_str)
 613         monitor_printf(mon, "    %s:", class_str);
 614     else
 615         monitor_printf(mon, "    Class %02x:", class_id);
 616     monitor_printf(mon, " USB device %04x:%04x", vendor_id, product_id);
 617     if (product_name[0] != '\0')
 618         monitor_printf(mon, ", %s", product_name);
 619     monitor_printf(mon, "\n");
 620 }
 621
 622 static int usb_host_info_device(void *opaque,
 623                                 int bus_num, int addr,
 624                                 int class_id,
 625                                 int vendor_id, int product_id,
 626                                 const char *product_name,
 627                                 int speed)
 628 {
 629     Monitor *mon = opaque;
 630
 631     usb_info_device(mon, bus_num, addr, class_id, vendor_id, product_id,
 632                     product_name, speed);
 633     return 0;
 634 }
 635
 636 void usb_host_info(Monitor *mon, const QDict *qdict)
 637 {
 638     usb_host_scan(mon, usb_host_info_device);
 639 }
 640
 641 /* XXX add this */
 642 int usb_host_device_close(const char *devname)
 643 {
 644     return 0;
 645 }