usb-linux.c

   1 /*
   2  * Linux host USB redirector
   3  *
   4  * Copyright (c) 2005 Fabrice Bellard
   5  *
   6  * Copyright (c) 2008 Max Krasnyansky
   7  *      Support for host device auto connect & disconnect
   8  *      Major rewrite to support fully async operation
   9  *
  10  * Permission is hereby granted, free of charge, to any person obtaining a copy
  11  * of this software and associated documentation files (the "Software"), to deal
  12  * in the Software without restriction, including without limitation the rights
  13  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  14  * copies of the Software, and to permit persons to whom the Software is
  15  * furnished to do so, subject to the following conditions:
  16  *
  17  * The above copyright notice and this permission notice shall be included in
  18  * all copies or substantial portions of the Software.
  19  *
  20  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  21  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  22  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
  23  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  24  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  25  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  26  * THE SOFTWARE.
  27  */
  28
  29 #include "qemu-common.h"
  30 #include "qemu-timer.h"
  31 #include "console.h"
  32
  33 #if defined(__linux__)
  34 #include <dirent.h>
  35 #include <sys/ioctl.h>
  36 #include <signal.h>
  37
  38 #include <linux/usbdevice_fs.h>
  39 #include <linux/version.h>
  40 #include "hw/usb.h"
  41
  42 /* We redefine it to avoid version problems */
  43 struct usb_ctrltransfer {
  44     uint8_t  bRequestType;
  45     uint8_t  bRequest;
  46     uint16_t wValue;
  47     uint16_t wIndex;
  48     uint16_t wLength;
  49     uint32_t timeout;
  50     void *data;
  51 };
  52
  53 struct usb_ctrlrequest {
  54     uint8_t bRequestType;
  55     uint8_t bRequest;
  56     uint16_t wValue;
  57     uint16_t wIndex;
  58     uint16_t wLength;
  59 };
  60
  61 typedef int USBScanFunc(void *opaque, int bus_num, int addr, int class_id,
  62                         int vendor_id, int product_id,
  63                         const char *product_name, int speed);
  64 static int usb_host_find_device(int *pbus_num, int *paddr,
  65                                 char *product_name, int product_name_size,
  66                                 const char *devname);
  67 //#define DEBUG
  68
  69 #ifdef DEBUG
  70 #define dprintf printf
  71 #else
  72 #define dprintf(...)
  73 #endif
  74
  75 #define USBDEVFS_PATH "/proc/bus/usb"
  76 #define PRODUCT_NAME_SZ 32
  77 #define MAX_ENDPOINTS 16
  78
  79 /* endpoint association data */
  80 struct endp_data {
  81     uint8_t type;
  82     uint8_t halted;
  83 };
  84
  85 enum {
  86     CTRL_STATE_IDLE = 0,
  87     CTRL_STATE_SETUP,
  88     CTRL_STATE_DATA,
  89     CTRL_STATE_ACK
  90 };
  91
  92 /*
  93  * Control transfer state.
  94  * Note that 'buffer' _must_ follow 'req' field because
  95  * we need contigious buffer when we submit control URB.
  96  */
  97 struct ctrl_struct {
  98     uint16_t len;
  99     uint16_t offset;
 100     uint8_t  state;
 101     struct   usb_ctrlrequest req;
 102     uint8_t  buffer[1024];
 103 };
 104
 105 typedef struct USBHostDevice {
 106     USBDevice dev;
 107     int       fd;
 108
 109     uint8_t   descr[1024];
 110     int       descr_len;
 111     int       configuration;
 112     int       ninterfaces;
 113     int       closing;
 114
 115     struct ctrl_struct ctrl;
 116     struct endp_data endp_table[MAX_ENDPOINTS];
 117
 118     /* Host side address */
 119     int bus_num;
 120     int addr;
 121
 122     struct USBHostDevice *next;
 123 } USBHostDevice;
 124
 125 static int is_isoc(USBHostDevice *s, int ep)
 126 {
 127     return s->endp_table[ep - 1].type == USBDEVFS_URB_TYPE_ISO;
 128 }
 129
 130 static int is_halted(USBHostDevice *s, int ep)
 131 {
 132     return s->endp_table[ep - 1].halted;
 133 }
 134
 135 static void clear_halt(USBHostDevice *s, int ep)
 136 {
 137     s->endp_table[ep - 1].halted = 0;
 138 }
 139
 140 static void set_halt(USBHostDevice *s, int ep)
 141 {
 142     s->endp_table[ep - 1].halted = 1;
 143 }
 144
 145 static USBHostDevice *hostdev_list;
 146
 147 static void hostdev_link(USBHostDevice *dev)
 148 {
 149     dev->next = hostdev_list;
 150     hostdev_list = dev;
 151 }
 152
 153 static void hostdev_unlink(USBHostDevice *dev)
 154 {
 155     USBHostDevice *pdev = hostdev_list;
 156     USBHostDevice **prev = &hostdev_list;
 157
 158     while (pdev) {
 159         if (pdev == dev) {
 160             *prev = dev->next;
 161             return;
 162         }
 163
 164         prev = &pdev->next;
 165         pdev = pdev->next;
 166     }
 167 }
 168
 169 static USBHostDevice *hostdev_find(int bus_num, int addr)
 170 {
 171     USBHostDevice *s = hostdev_list;
 172     while (s) {
 173         if (s->bus_num == bus_num && s->addr == addr)
 174             return s;
 175         s = s->next;
 176     }
 177     return NULL;
 178 }
 179
 180 /*
 181  * Async URB state.
 182  * We always allocate one isoc descriptor even for bulk transfers
 183  * to simplify allocation and casts.
 184  */
 185 typedef struct AsyncURB
 186 {
 187     struct usbdevfs_urb urb;
 188     struct usbdevfs_iso_packet_desc isocpd;
 189
 190     USBPacket     *packet;
 191     USBHostDevice *hdev;
 192 } AsyncURB;
 193
 194 static AsyncURB *async_alloc(void)
 195 {
 196     return (AsyncURB *) qemu_mallocz(sizeof(AsyncURB));
 197 }
 198
 199 static void async_free(AsyncURB *aurb)
 200 {
 201     qemu_free(aurb);
 202 }
 203
 204 static void async_complete_ctrl(USBHostDevice *s, USBPacket *p)
 205 {
 206     switch(s->ctrl.state) {
 207     case CTRL_STATE_SETUP:
 208         if (p->len < s->ctrl.len)
 209             s->ctrl.len = p->len;
 210         s->ctrl.state = CTRL_STATE_DATA;
 211         p->len = 8;
 212         break;
 213
 214     case CTRL_STATE_ACK:
 215         s->ctrl.state = CTRL_STATE_IDLE;
 216         p->len = 0;
 217         break;
 218
 219     default:
 220         break;
 221     }
 222 }
 223
 224 static void async_complete(void *opaque)
 225 {
 226     USBHostDevice *s = opaque;
 227     AsyncURB *aurb;
 228
 229     while (1) {
 230         USBPacket *p;
 231
 232         int r = ioctl(s->fd, USBDEVFS_REAPURBNDELAY, &aurb);
 233         if (r < 0) {
 234             if (errno == EAGAIN)
 235                 return;
 236
 237             if (errno == ENODEV && !s->closing) {
 238                 printf("husb: device %d.%d disconnected\n", s->bus_num, s->addr);
 239                 usb_device_del_addr(0, s->dev.addr);
 240                 return;
 241             }
 242
 243             dprintf("husb: async. reap urb failed errno %d\n", errno);
 244             return;
 245         }
 246
 247         p = aurb->packet;
 248
 249         dprintf("husb: async completed. aurb %p status %d alen %d\n",
 250                 aurb, aurb->urb.status, aurb->urb.actual_length);
 251
 252         if (p) {
 253             switch (aurb->urb.status) {
 254             case 0:
 255                 p->len = aurb->urb.actual_length;
 256                 if (aurb->urb.type == USBDEVFS_URB_TYPE_CONTROL)
 257                     async_complete_ctrl(s, p);
 258                 break;
 259
 260             case -EPIPE:
 261                 set_halt(s, p->devep);
 262                 /* fall through */
 263             default:
 264                 p->len = USB_RET_NAK;
 265                 break;
 266             }
 267
 268             usb_packet_complete(p);
 269         }
 270
 271         async_free(aurb);
 272     }
 273 }
 274
 275 static void async_cancel(USBPacket *unused, void *opaque)
 276 {
 277     AsyncURB *aurb = opaque;
 278     USBHostDevice *s = aurb->hdev;
 279
 280     dprintf("husb: async cancel. aurb %p\n", aurb);
 281
 282     /* Mark it as dead (see async_complete above) */
 283     aurb->packet = NULL;
 284
 285     int r = ioctl(s->fd, USBDEVFS_DISCARDURB, aurb);
 286     if (r < 0) {
 287         dprintf("husb: async. discard urb failed errno %d\n", errno);
 288     }
 289 }
 290
 291 static int usb_host_claim_interfaces(USBHostDevice *dev, int configuration)
 292 {
 293     int dev_descr_len, config_descr_len;
 294     int interface, nb_interfaces, nb_configurations;
 295     int ret, i;
 296
 297     if (configuration == 0) /* address state - ignore */
 298         return 1;
 299
 300     dprintf("husb: claiming interfaces. config %d\n", configuration);
 301
 302     i = 0;
 303     dev_descr_len = dev->descr[0];
 304     if (dev_descr_len > dev->descr_len)
 305         goto fail;
 306     nb_configurations = dev->descr[17];
 307
 308     i += dev_descr_len;
 309     while (i < dev->descr_len) {
 310         dprintf("husb: i is %d, descr_len is %d, dl %d, dt %d\n", i, dev->descr_len,
 311                dev->descr[i], dev->descr[i+1]);
 312
 313         if (dev->descr[i+1] != USB_DT_CONFIG) {
 314             i += dev->descr[i];
 315             continue;
 316         }
 317         config_descr_len = dev->descr[i];
 318
 319         printf("husb: config #%d need %d\n", dev->descr[i + 5], configuration);
 320
 321         if (configuration < 0 || configuration == dev->descr[i + 5]) {
 322             configuration = dev->descr[i + 5];
 323             break;
 324         }
 325
 326         i += config_descr_len;
 327     }
 328
 329     if (i >= dev->descr_len) {
 330         fprintf(stderr, "husb: update iface failed. no matching configuration\n");
 331         goto fail;
 332     }
 333     nb_interfaces = dev->descr[i + 4];
 334
 335 #ifdef USBDEVFS_DISCONNECT
 336     /* earlier Linux 2.4 do not support that */
 337     {
 338         struct usbdevfs_ioctl ctrl;
 339         for (interface = 0; interface < nb_interfaces; interface++) {
 340             ctrl.ioctl_code = USBDEVFS_DISCONNECT;
 341             ctrl.ifno = interface;
 342             ret = ioctl(dev->fd, USBDEVFS_IOCTL, &ctrl);
 343             if (ret < 0 && errno != ENODATA) {
 344                 perror("USBDEVFS_DISCONNECT");
 345                 goto fail;
 346             }
 347         }
 348     }
 349 #endif
 350
 351     /* XXX: only grab if all interfaces are free */
 352     for (interface = 0; interface < nb_interfaces; interface++) {
 353         ret = ioctl(dev->fd, USBDEVFS_CLAIMINTERFACE, &interface);
 354         if (ret < 0) {
 355             if (errno == EBUSY) {
 356                 printf("husb: update iface. device already grabbed\n");
 357             } else {
 358                 perror("husb: failed to claim interface");
 359             }
 360         fail:
 361             return 0;
 362         }
 363     }
 364
 365     printf("husb: %d interfaces claimed for configuration %d\n",
 366            nb_interfaces, configuration);
 367
 368     dev->ninterfaces   = nb_interfaces;
 369     dev->configuration = configuration;
 370     return 1;
 371 }
 372
 373 static int usb_host_release_interfaces(USBHostDevice *s)
 374 {
 375     int ret, i;
 376
 377     dprintf("husb: releasing interfaces\n");
 378
 379     for (i = 0; i < s->ninterfaces; i++) {
 380         ret = ioctl(s->fd, USBDEVFS_RELEASEINTERFACE, &i);
 381         if (ret < 0) {
 382             perror("husb: failed to release interface");
 383             return 0;
 384         }
 385     }
 386
 387     return 1;
 388 }
 389
 390 static void usb_host_handle_reset(USBDevice *dev)
 391 {
 392     USBHostDevice *s = (USBHostDevice *) dev;
 393
 394     dprintf("husb: reset device %u.%u\n", s->bus_num, s->addr);
 395
 396     ioctl(s->fd, USBDEVFS_RESET);
 397
 398     usb_host_claim_interfaces(s, s->configuration);
 399 }
 400
 401 static void usb_host_handle_destroy(USBDevice *dev)
 402 {
 403     USBHostDevice *s = (USBHostDevice *)dev;
 404
 405     s->closing = 1;
 406
 407     qemu_set_fd_handler(s->fd, NULL, NULL, NULL);
 408
 409     hostdev_unlink(s);
 410
 411     async_complete(s);
 412
 413     if (s->fd >= 0)
 414         close(s->fd);
 415
 416     qemu_free(s);
 417 }
 418
 419 static int usb_linux_update_endp_table(USBHostDevice *s);
 420
 421 static int usb_host_handle_data(USBHostDevice *s, USBPacket *p)
 422 {
 423     struct usbdevfs_urb *urb;
 424     AsyncURB *aurb;
 425     int ret;
 426
 427     aurb = async_alloc();
 428     if (!aurb) {
 429         dprintf("husb: async malloc failed\n");
 430         return USB_RET_NAK;
 431     }
 432     aurb->hdev   = s;
 433     aurb->packet = p;
 434
 435     urb = &aurb->urb;
 436
 437     if (p->pid == USB_TOKEN_IN)
 438         urb->endpoint = p->devep | 0x80;
 439     else
 440         urb->endpoint = p->devep;
 441
 442     if (is_halted(s, p->devep)) {
 443         ret = ioctl(s->fd, USBDEVFS_CLEAR_HALT, &urb->endpoint);
 444         if (ret < 0) {
 445             dprintf("husb: failed to clear halt. ep 0x%x errno %d\n",
 446                    urb->endpoint, errno);
 447             return USB_RET_NAK;
 448         }
 449         clear_halt(s, p->devep);
 450     }
 451
 452     urb->buffer        = p->data;
 453     urb->buffer_length = p->len;
 454
 455     if (is_isoc(s, p->devep)) {
 456         /* Setup ISOC transfer */
 457         urb->type     = USBDEVFS_URB_TYPE_ISO;
 458         urb->flags    = USBDEVFS_URB_ISO_ASAP;
 459         urb->number_of_packets = 1;
 460         urb->iso_frame_desc[0].length = p->len;
 461     } else {
 462         /* Setup bulk transfer */
 463         urb->type     = USBDEVFS_URB_TYPE_BULK;
 464     }
 465
 466     urb->usercontext = s;
 467
 468     ret = ioctl(s->fd, USBDEVFS_SUBMITURB, urb);
 469
 470     dprintf("husb: data submit. ep 0x%x len %u aurb %p\n", urb->endpoint, p->len, aurb);
 471
 472     if (ret < 0) {
 473         dprintf("husb: submit failed. errno %d\n", errno);
 474         async_free(aurb);
 475
 476         switch(errno) {
 477         case ETIMEDOUT:
 478             return USB_RET_NAK;
 479         case EPIPE:
 480         default:
 481             return USB_RET_STALL;
 482         }
 483     }
 484
 485     usb_defer_packet(p, async_cancel, aurb);
 486     return USB_RET_ASYNC;
 487 }
 488
 489 static int ctrl_error(void)
 490 {
 491     if (errno == ETIMEDOUT)
 492         return USB_RET_NAK;
 493     else
 494         return USB_RET_STALL;
 495 }
 496
 497 static int usb_host_set_address(USBHostDevice *s, int addr)
 498 {
 499     dprintf("husb: ctrl set addr %u\n", addr);
 500     s->dev.addr = addr;
 501     return 0;
 502 }
 503
 504 static int usb_host_set_config(USBHostDevice *s, int config)
 505 {
 506     usb_host_release_interfaces(s);
 507
 508     int ret = ioctl(s->fd, USBDEVFS_SETCONFIGURATION, &config);
 509
 510     dprintf("husb: ctrl set config %d ret %d errno %d\n", config, ret, errno);
 511
 512     if (ret < 0)
 513         return ctrl_error();
 514
 515     usb_host_claim_interfaces(s, config);
 516     return 0;
 517 }
 518
 519 static int usb_host_set_interface(USBHostDevice *s, int iface, int alt)
 520 {
 521     struct usbdevfs_setinterface si;
 522     int ret;
 523
 524     si.interface  = iface;
 525     si.altsetting = alt;
 526     ret = ioctl(s->fd, USBDEVFS_SETINTERFACE, &si);
 527
 528     dprintf("husb: ctrl set iface %d altset %d ret %d errno %d\n",
 529         iface, alt, ret, errno);
 530
 531     if (ret < 0)
 532         return ctrl_error();
 533
 534     usb_linux_update_endp_table(s);
 535     return 0;
 536 }
 537
 538 static int usb_host_handle_control(USBHostDevice *s, USBPacket *p)
 539 {
 540     struct usbdevfs_urb *urb;
 541     AsyncURB *aurb;
 542     int ret, value, index;
 543
 544     /*
 545      * Process certain standard device requests.
 546      * These are infrequent and are processed synchronously.
 547      */
 548     value = le16_to_cpu(s->ctrl.req.wValue);
 549     index = le16_to_cpu(s->ctrl.req.wIndex);
 550
 551     dprintf("husb: ctrl type 0x%x req 0x%x val 0x%x index %u len %u\n",
 552         s->ctrl.req.bRequestType, s->ctrl.req.bRequest, value, index,
 553         s->ctrl.len);
 554
 555     if (s->ctrl.req.bRequestType == 0) {
 556         switch (s->ctrl.req.bRequest) {
 557         case USB_REQ_SET_ADDRESS:
 558             return usb_host_set_address(s, value);
 559
 560         case USB_REQ_SET_CONFIGURATION:
 561             return usb_host_set_config(s, value & 0xff);
 562         }
 563     }
 564
 565     if (s->ctrl.req.bRequestType == 1 &&
 566                   s->ctrl.req.bRequest == USB_REQ_SET_INTERFACE)
 567         return usb_host_set_interface(s, index, value);
 568
 569     /* The rest are asynchronous */
 570
 571     aurb = async_alloc();
 572     if (!aurb) {
 573         dprintf("husb: async malloc failed\n");
 574         return USB_RET_NAK;
 575     }
 576     aurb->hdev   = s;
 577     aurb->packet = p;
 578
 579     /*
 580      * Setup ctrl transfer.
 581      *
 582      * s->ctrl is layed out such that data buffer immediately follows
 583      * 'req' struct which is exactly what usbdevfs expects.
 584      */
 585     urb = &aurb->urb;
 586
 587     urb->type     = USBDEVFS_URB_TYPE_CONTROL;
 588     urb->endpoint = p->devep;
 589
 590     urb->buffer        = &s->ctrl.req;
 591     urb->buffer_length = 8 + s->ctrl.len;
 592
 593     urb->usercontext = s;
 594
 595     ret = ioctl(s->fd, USBDEVFS_SUBMITURB, urb);
 596
 597     dprintf("husb: submit ctrl. len %u aurb %p\n", urb->buffer_length, aurb);
 598
 599     if (ret < 0) {
 600         dprintf("husb: submit failed. errno %d\n", errno);
 601         async_free(aurb);
 602
 603         switch(errno) {
 604         case ETIMEDOUT:
 605             return USB_RET_NAK;
 606         case EPIPE:
 607         default:
 608             return USB_RET_STALL;
 609         }
 610     }
 611
 612     usb_defer_packet(p, async_cancel, aurb);
 613     return USB_RET_ASYNC;
 614 }
 615
 616 static int do_token_setup(USBDevice *dev, USBPacket *p)
 617 {
 618     USBHostDevice *s = (USBHostDevice *) dev;
 619     int ret = 0;
 620
 621     if (p->len != 8)
 622         return USB_RET_STALL;
 623
 624     memcpy(&s->ctrl.req, p->data, 8);
 625     s->ctrl.len    = le16_to_cpu(s->ctrl.req.wLength);
 626     s->ctrl.offset = 0;
 627     s->ctrl.state  = CTRL_STATE_SETUP;
 628
 629     if (s->ctrl.req.bRequestType & USB_DIR_IN) {
 630         ret = usb_host_handle_control(s, p);
 631         if (ret < 0)
 632             return ret;
 633
 634         if (ret < s->ctrl.len)
 635             s->ctrl.len = ret;
 636         s->ctrl.state = CTRL_STATE_DATA;
 637     } else {
 638         if (s->ctrl.len == 0)
 639             s->ctrl.state = CTRL_STATE_ACK;
 640         else
 641             s->ctrl.state = CTRL_STATE_DATA;
 642     }
 643
 644     return ret;
 645 }
 646
 647 static int do_token_in(USBDevice *dev, USBPacket *p)
 648 {
 649     USBHostDevice *s = (USBHostDevice *) dev;
 650     int ret = 0;
 651
 652     if (p->devep != 0)
 653         return usb_host_handle_data(s, p);
 654
 655     switch(s->ctrl.state) {
 656     case CTRL_STATE_ACK:
 657         if (!(s->ctrl.req.bRequestType & USB_DIR_IN)) {
 658             ret = usb_host_handle_control(s, p);
 659             if (ret == USB_RET_ASYNC)
 660                 return USB_RET_ASYNC;
 661
 662             s->ctrl.state = CTRL_STATE_IDLE;
 663             return ret > 0 ? 0 : ret;
 664         }
 665
 666         return 0;
 667
 668     case CTRL_STATE_DATA:
 669         if (s->ctrl.req.bRequestType & USB_DIR_IN) {
 670             int len = s->ctrl.len - s->ctrl.offset;
 671             if (len > p->len)
 672                 len = p->len;
 673             memcpy(p->data, s->ctrl.buffer + s->ctrl.offset, len);
 674             s->ctrl.offset += len;
 675             if (s->ctrl.offset >= s->ctrl.len)
 676                 s->ctrl.state = CTRL_STATE_ACK;
 677             return len;
 678         }
 679
 680         s->ctrl.state = CTRL_STATE_IDLE;
 681         return USB_RET_STALL;
 682
 683     default:
 684         return USB_RET_STALL;
 685     }
 686 }
 687
 688 static int do_token_out(USBDevice *dev, USBPacket *p)
 689 {
 690     USBHostDevice *s = (USBHostDevice *) dev;
 691
 692     if (p->devep != 0)
 693         return usb_host_handle_data(s, p);
 694
 695     switch(s->ctrl.state) {
 696     case CTRL_STATE_ACK:
 697         if (s->ctrl.req.bRequestType & USB_DIR_IN) {
 698             s->ctrl.state = CTRL_STATE_IDLE;
 699             /* transfer OK */
 700         } else {
 701             /* ignore additional output */
 702         }
 703         return 0;
 704
 705     case CTRL_STATE_DATA:
 706         if (!(s->ctrl.req.bRequestType & USB_DIR_IN)) {
 707             int len = s->ctrl.len - s->ctrl.offset;
 708             if (len > p->len)
 709                 len = p->len;
 710             memcpy(s->ctrl.buffer + s->ctrl.offset, p->data, len);
 711             s->ctrl.offset += len;
 712             if (s->ctrl.offset >= s->ctrl.len)
 713                 s->ctrl.state = CTRL_STATE_ACK;
 714             return len;
 715         }
 716
 717         s->ctrl.state = CTRL_STATE_IDLE;
 718         return USB_RET_STALL;
 719
 720     default:
 721         return USB_RET_STALL;
 722     }
 723 }
 724
 725 /*
 726  * Packet handler.
 727  * Called by the HC (host controller).
 728  *
 729  * Returns length of the transaction or one of the USB_RET_XXX codes.
 730  */
 731 static int usb_host_handle_packet(USBDevice *s, USBPacket *p)
 732 {
 733     switch(p->pid) {
 734     case USB_MSG_ATTACH:
 735         s->state = USB_STATE_ATTACHED;
 736         return 0;
 737
 738     case USB_MSG_DETACH:
 739         s->state = USB_STATE_NOTATTACHED;
 740         return 0;
 741
 742     case USB_MSG_RESET:
 743         s->remote_wakeup = 0;
 744         s->addr = 0;
 745         s->state = USB_STATE_DEFAULT;
 746         s->handle_reset(s);
 747         return 0;
 748     }
 749
 750     /* Rest of the PIDs must match our address */
 751     if (s->state < USB_STATE_DEFAULT || p->devaddr != s->addr)
 752         return USB_RET_NODEV;
 753
 754     switch (p->pid) {
 755     case USB_TOKEN_SETUP:
 756         return do_token_setup(s, p);
 757
 758     case USB_TOKEN_IN:
 759         return do_token_in(s, p);
 760
 761     case USB_TOKEN_OUT:
 762         return do_token_out(s, p);
 763
 764     default:
 765         return USB_RET_STALL;
 766     }
 767 }
 768
 769 /* returns 1 on problem encountered or 0 for success */
 770 static int usb_linux_update_endp_table(USBHostDevice *s)
 771 {
 772     uint8_t *descriptors;
 773     uint8_t devep, type, configuration, alt_interface;
 774     struct usbdevfs_ctrltransfer ct;
 775     int interface, ret, length, i;
 776
 777     ct.bRequestType = USB_DIR_IN;
 778     ct.bRequest = USB_REQ_GET_CONFIGURATION;
 779     ct.wValue = 0;
 780     ct.wIndex = 0;
 781     ct.wLength = 1;
 782     ct.data = &configuration;
 783     ct.timeout = 50;
 784
 785     ret = ioctl(s->fd, USBDEVFS_CONTROL, &ct);
 786     if (ret < 0) {
 787         perror("usb_linux_update_endp_table");
 788         return 1;
 789     }
 790
 791     /* in address state */
 792     if (configuration == 0)
 793         return 1;
 794
 795     /* get the desired configuration, interface, and endpoint descriptors
 796      * from device description */
 797     descriptors = &s->descr[18];
 798     length = s->descr_len - 18;
 799     i = 0;
 800
 801     if (descriptors[i + 1] != USB_DT_CONFIG ||
 802         descriptors[i + 5] != configuration) {
 803         dprintf("invalid descriptor data - configuration\n");
 804         return 1;
 805     }
 806     i += descriptors[i];
 807
 808     while (i < length) {
 809         if (descriptors[i + 1] != USB_DT_INTERFACE ||
 810             (descriptors[i + 1] == USB_DT_INTERFACE &&
 811              descriptors[i + 4] == 0)) {
 812             i += descriptors[i];
 813             continue;
 814         }
 815
 816         interface = descriptors[i + 2];
 817
 818         ct.bRequestType = USB_DIR_IN | USB_RECIP_INTERFACE;
 819         ct.bRequest = USB_REQ_GET_INTERFACE;
 820         ct.wValue = 0;
 821         ct.wIndex = interface;
 822         ct.wLength = 1;
 823         ct.data = &alt_interface;
 824         ct.timeout = 50;
 825
 826         ret = ioctl(s->fd, USBDEVFS_CONTROL, &ct);
 827         if (ret < 0) {
 828             perror("usb_linux_update_endp_table");
 829             return 1;
 830         }
 831
 832         /* the current interface descriptor is the active interface
 833          * and has endpoints */
 834         if (descriptors[i + 3] != alt_interface) {
 835             i += descriptors[i];
 836             continue;
 837         }
 838
 839         /* advance to the endpoints */
 840         while (i < length && descriptors[i +1] != USB_DT_ENDPOINT)
 841             i += descriptors[i];
 842
 843         if (i >= length)
 844             break;
 845
 846         while (i < length) {
 847             if (descriptors[i + 1] != USB_DT_ENDPOINT)
 848                 break;
 849
 850             devep = descriptors[i + 2];
 851             switch (descriptors[i + 3] & 0x3) {
 852             case 0x00:
 853                 type = USBDEVFS_URB_TYPE_CONTROL;
 854                 break;
 855             case 0x01:
 856                 type = USBDEVFS_URB_TYPE_ISO;
 857                 break;
 858             case 0x02:
 859                 type = USBDEVFS_URB_TYPE_BULK;
 860                 break;
 861             case 0x03:
 862                 type = USBDEVFS_URB_TYPE_INTERRUPT;
 863                 break;
 864             default:
 865                 dprintf("usb_host: malformed endpoint type\n");
 866                 type = USBDEVFS_URB_TYPE_BULK;
 867             }
 868             s->endp_table[(devep & 0xf) - 1].type = type;
 869             s->endp_table[(devep & 0xf) - 1].halted = 0;
 870
 871             i += descriptors[i];
 872         }
 873     }
 874     return 0;
 875 }
 876
 877 static USBDevice *usb_host_device_open_addr(int bus_num, int addr, const char *prod_name)
 878 {
 879     int fd = -1, ret;
 880     USBHostDevice *dev = NULL;
 881     struct usbdevfs_connectinfo ci;
 882     char buf[1024];
 883
 884     dev = qemu_mallocz(sizeof(USBHostDevice));
 885     if (!dev)
 886         goto fail;
 887
 888     dev->bus_num = bus_num;
 889     dev->addr = addr;
 890
 891     printf("husb: open device %d.%d\n", bus_num, addr);
 892
 893     snprintf(buf, sizeof(buf), USBDEVFS_PATH "/%03d/%03d",
 894              bus_num, addr);
 895     fd = open(buf, O_RDWR | O_NONBLOCK);
 896     if (fd < 0) {
 897         perror(buf);
 898         goto fail;
 899     }
 900
 901     /* read the device description */
 902     dev->descr_len = read(fd, dev->descr, sizeof(dev->descr));
 903     if (dev->descr_len <= 0) {
 904         perror("husb: reading device data failed");
 905         goto fail;
 906     }
 907
 908 #ifdef DEBUG
 909     {
 910         int x;
 911         printf("=== begin dumping device descriptor data ===\n");
 912         for (x = 0; x < dev->descr_len; x++)
 913             printf("%02x ", dev->descr[x]);
 914         printf("\n=== end dumping device descriptor data ===\n");
 915     }
 916 #endif
 917
 918     dev->fd = fd;
 919
 920     /*
 921      * Initial configuration is -1 which makes us claim first
 922      * available config. We used to start with 1, which does not
 923      * always work. I've seen devices where first config starts
 924      * with 2.
 925      */
 926     if (!usb_host_claim_interfaces(dev, -1))
 927         goto fail;
 928
 929     ret = ioctl(fd, USBDEVFS_CONNECTINFO, &ci);
 930     if (ret < 0) {
 931         perror("usb_host_device_open: USBDEVFS_CONNECTINFO");
 932         goto fail;
 933     }
 934
 935     printf("husb: grabbed usb device %d.%d\n", bus_num, addr);
 936
 937     ret = usb_linux_update_endp_table(dev);
 938     if (ret)
 939         goto fail;
 940
 941     if (ci.slow)
 942         dev->dev.speed = USB_SPEED_LOW;
 943     else
 944         dev->dev.speed = USB_SPEED_HIGH;
 945
 946     dev->dev.handle_packet  = usb_host_handle_packet;
 947     dev->dev.handle_reset   = usb_host_handle_reset;
 948     dev->dev.handle_destroy = usb_host_handle_destroy;
 949
 950     if (!prod_name || prod_name[0] == '\0')
 951         snprintf(dev->dev.devname, sizeof(dev->dev.devname),
 952                  "host:%d.%d", bus_num, addr);
 953     else
 954         pstrcpy(dev->dev.devname, sizeof(dev->dev.devname),
 955                 prod_name);
 956
 957     /* USB devio uses 'write' flag to check for async completions */
 958     qemu_set_fd_handler(dev->fd, NULL, async_complete, dev);
 959
 960     hostdev_link(dev);
 961
 962     return (USBDevice *) dev;
 963
 964 fail:
 965     if (dev)
 966         qemu_free(dev);
 967
 968     close(fd);
 969     return NULL;
 970 }
 971
 972 static int usb_host_auto_add(const char *spec);
 973 static int usb_host_auto_del(const char *spec);
 974
 975 USBDevice *usb_host_device_open(const char *devname)
 976 {
 977     int bus_num, addr;
 978     char product_name[PRODUCT_NAME_SZ];
 979
 980     if (strstr(devname, "auto:")) {
 981         usb_host_auto_add(devname);
 982         return NULL;
 983     }
 984
 985     if (usb_host_find_device(&bus_num, &addr, product_name, sizeof(product_name),
 986                              devname) < 0)
 987         return NULL;
 988
 989     if (hostdev_find(bus_num, addr)) {
 990        term_printf("husb: host usb device %d.%d is already open\n", bus_num, addr);
 991        return NULL;
 992     }
 993
 994     return usb_host_device_open_addr(bus_num, addr, product_name);
 995 }
 996
 997 int usb_host_device_close(const char *devname)
 998 {
 999     char product_name[PRODUCT_NAME_SZ];
1000     int bus_num, addr;
1001     USBHostDevice *s;
1002
1003     if (strstr(devname, "auto:"))
1004         return usb_host_auto_del(devname);
1005
1006     if (usb_host_find_device(&bus_num, &addr, product_name, sizeof(product_name),
1007                              devname) < 0)
1008         return -1;
1009
1010     s = hostdev_find(bus_num, addr);
1011     if (s) {
1012         usb_device_del_addr(0, s->dev.addr);
1013         return 0;
1014     }
1015
1016     return -1;
1017 }
1018
1019 static int get_tag_value(char *buf, int buf_size,
1020                          const char *str, const char *tag,
1021                          const char *stopchars)
1022 {
1023     const char *p;
1024     char *q;
1025     p = strstr(str, tag);
1026     if (!p)
1027         return -1;
1028     p += strlen(tag);
1029     while (isspace(*p))
1030         p++;
1031     q = buf;
1032     while (*p != '\0' && !strchr(stopchars, *p)) {
1033         if ((q - buf) < (buf_size - 1))
1034             *q++ = *p;
1035         p++;
1036     }
1037     *q = '\0';
1038     return q - buf;
1039 }
1040
1041 static int usb_host_scan(void *opaque, USBScanFunc *func)
1042 {
1043     FILE *f;
1044     char line[1024];
1045     char buf[1024];
1046     int bus_num, addr, speed, device_count, class_id, product_id, vendor_id;
1047     int ret;
1048     char product_name[512];
1049
1050     f = fopen(USBDEVFS_PATH "/devices", "r");
1051     if (!f) {
1052         term_printf("husb: could not open %s\n", USBDEVFS_PATH "/devices");
1053         return 0;
1054     }
1055     device_count = 0;
1056     bus_num = addr = speed = class_id = product_id = vendor_id = 0;
1057     ret = 0;
1058     for(;;) {
1059         if (fgets(line, sizeof(line), f) == NULL)
1060             break;
1061         if (strlen(line) > 0)
1062             line[strlen(line) - 1] = '\0';
1063         if (line[0] == 'T' && line[1] == ':') {
1064             if (device_count && (vendor_id || product_id)) {
1065                 /* New device.  Add the previously discovered device.  */
1066                 ret = func(opaque, bus_num, addr, class_id, vendor_id,
1067                            product_id, product_name, speed);
1068                 if (ret)
1069                     goto the_end;
1070             }
1071             if (get_tag_value(buf, sizeof(buf), line, "Bus=", " ") < 0)
1072                 goto fail;
1073             bus_num = atoi(buf);
1074             if (get_tag_value(buf, sizeof(buf), line, "Dev#=", " ") < 0)
1075                 goto fail;
1076             addr = atoi(buf);
1077             if (get_tag_value(buf, sizeof(buf), line, "Spd=", " ") < 0)
1078                 goto fail;
1079             if (!strcmp(buf, "480"))
1080                 speed = USB_SPEED_HIGH;
1081             else if (!strcmp(buf, "1.5"))
1082                 speed = USB_SPEED_LOW;
1083             else
1084                 speed = USB_SPEED_FULL;
1085             product_name[0] = '\0';
1086             class_id = 0xff;
1087             device_count++;
1088             product_id = 0;
1089             vendor_id = 0;
1090         } else if (line[0] == 'P' && line[1] == ':') {
1091             if (get_tag_value(buf, sizeof(buf), line, "Vendor=", " ") < 0)
1092                 goto fail;
1093             vendor_id = strtoul(buf, NULL, 16);
1094             if (get_tag_value(buf, sizeof(buf), line, "ProdID=", " ") < 0)
1095                 goto fail;
1096             product_id = strtoul(buf, NULL, 16);
1097         } else if (line[0] == 'S' && line[1] == ':') {
1098             if (get_tag_value(buf, sizeof(buf), line, "Product=", "") < 0)
1099                 goto fail;
1100             pstrcpy(product_name, sizeof(product_name), buf);
1101         } else if (line[0] == 'D' && line[1] == ':') {
1102             if (get_tag_value(buf, sizeof(buf), line, "Cls=", " (") < 0)
1103                 goto fail;
1104             class_id = strtoul(buf, NULL, 16);
1105         }
1106     fail: ;
1107     }
1108     if (device_count && (vendor_id || product_id)) {
1109         /* Add the last device.  */
1110         ret = func(opaque, bus_num, addr, class_id, vendor_id,
1111                    product_id, product_name, speed);
1112     }
1113  the_end:
1114     fclose(f);
1115     return ret;
1116 }
1117
1118 struct USBAutoFilter {
1119     struct USBAutoFilter *next;
1120     int bus_num;
1121     int addr;
1122     int vendor_id;
1123     int product_id;
1124 };
1125
1126 static QEMUTimer *usb_auto_timer;
1127 static struct USBAutoFilter *usb_auto_filter;
1128
1129 static int usb_host_auto_scan(void *opaque, int bus_num, int addr,
1130                      int class_id, int vendor_id, int product_id,
1131                      const char *product_name, int speed)
1132 {
1133     struct USBAutoFilter *f;
1134     struct USBDevice *dev;
1135
1136     /* Ignore hubs */
1137     if (class_id == 9)
1138         return 0;
1139
1140     for (f = usb_auto_filter; f; f = f->next) {
1141         if (f->bus_num >= 0 && f->bus_num != bus_num)
1142             continue;
1143
1144         if (f->addr >= 0 && f->addr != addr)
1145             continue;
1146
1147         if (f->vendor_id >= 0 && f->vendor_id != vendor_id)
1148             continue;
1149
1150         if (f->product_id >= 0 && f->product_id != product_id)
1151             continue;
1152
1153         /* We got a match */
1154
1155         /* Allredy attached ? */
1156         if (hostdev_find(bus_num, addr))
1157             return 0;
1158
1159         dprintf("husb: auto open: bus_num %d addr %d\n", bus_num, addr);
1160
1161         dev = usb_host_device_open_addr(bus_num, addr, product_name);
1162         if (dev)
1163             usb_device_add_dev(dev);
1164     }
1165
1166     return 0;
1167 }
1168
1169 static void usb_host_auto_timer(void *unused)
1170 {
1171     usb_host_scan(NULL, usb_host_auto_scan);
1172     qemu_mod_timer(usb_auto_timer, qemu_get_clock(rt_clock) + 2000);
1173 }
1174
1175 /*
1176  * Autoconnect filter
1177  * Format:
1178  *    auto:bus:dev[:vid:pid]
1179  *    auto:bus.dev[:vid:pid]
1180  *
1181  *    bus  - bus number    (dec, * means any)
1182  *    dev  - device number (dec, * means any)
1183  *    vid  - vendor id     (hex, * means any)
1184  *    pid  - product id    (hex, * means any)
1185  *
1186  *    See 'lsusb' output.
1187  */
1188 static int parse_filter(const char *spec, struct USBAutoFilter *f)
1189 {
1190     enum { BUS, DEV, VID, PID, DONE };
1191     const char *p = spec;
1192     int i;
1193
1194     f->bus_num    = -1;
1195     f->addr       = -1;
1196     f->vendor_id  = -1;
1197     f->product_id = -1;
1198
1199     for (i = BUS; i < DONE; i++) {
1200         p = strpbrk(p, ":.");
1201         if (!p) break;
1202         p++;
1203
1204         if (*p == '*')
1205             continue;
1206
1207         switch(i) {
1208         case BUS: f->bus_num = strtol(p, NULL, 10);    break;
1209         case DEV: f->addr    = strtol(p, NULL, 10);    break;
1210         case VID: f->vendor_id  = strtol(p, NULL, 16); break;
1211         case PID: f->product_id = strtol(p, NULL, 16); break;
1212         }
1213     }
1214
1215     if (i < DEV) {
1216         fprintf(stderr, "husb: invalid auto filter spec %s\n", spec);
1217         return -1;
1218     }
1219
1220     return 0;
1221 }
1222
1223 static int match_filter(const struct USBAutoFilter *f1,
1224                         const struct USBAutoFilter *f2)
1225 {
1226     return f1->bus_num    == f2->bus_num &&
1227            f1->addr       == f2->addr &&
1228            f1->vendor_id  == f2->vendor_id &&
1229            f1->product_id == f2->product_id;
1230 }
1231
1232 static int usb_host_auto_add(const char *spec)
1233 {
1234     struct USBAutoFilter filter, *f;
1235
1236     if (parse_filter(spec, &filter) < 0)
1237         return -1;
1238
1239     f = qemu_mallocz(sizeof(*f));
1240     if (!f) {
1241         fprintf(stderr, "husb: failed to allocate auto filter\n");
1242         return -1;
1243     }
1244
1245     *f = filter;
1246
1247     if (!usb_auto_filter) {
1248         /*
1249          * First entry. Init and start the monitor.
1250          * Right now we're using timer to check for new devices.
1251          * If this turns out to be too expensive we can move that into a
1252          * separate thread.
1253          */
1254         usb_auto_timer = qemu_new_timer(rt_clock, usb_host_auto_timer, NULL);
1255         if (!usb_auto_timer) {
1256             fprintf(stderr, "husb: failed to allocate auto scan timer\n");
1257             qemu_free(f);
1258             return -1;
1259         }
1260
1261         /* Check for new devices every two seconds */
1262         qemu_mod_timer(usb_auto_timer, qemu_get_clock(rt_clock) + 2000);
1263     }
1264
1265     dprintf("husb: added auto filter: bus_num %d addr %d vid %d pid %d\n",
1266         f->bus_num, f->addr, f->vendor_id, f->product_id);
1267
1268     f->next = usb_auto_filter;
1269     usb_auto_filter = f;
1270
1271     return 0;
1272 }
1273
1274 static int usb_host_auto_del(const char *spec)
1275 {
1276     struct USBAutoFilter *pf = usb_auto_filter;
1277     struct USBAutoFilter **prev = &usb_auto_filter;
1278     struct USBAutoFilter filter;
1279
1280     if (parse_filter(spec, &filter) < 0)
1281         return -1;
1282
1283     while (pf) {
1284         if (match_filter(pf, &filter)) {
1285             dprintf("husb: removed auto filter: bus_num %d addr %d vid %d pid %d\n",
1286                      pf->bus_num, pf->addr, pf->vendor_id, pf->product_id);
1287
1288             *prev = pf->next;
1289
1290             if (!usb_auto_filter) {
1291                 /* No more filters. Stop scanning. */
1292                 qemu_del_timer(usb_auto_timer);
1293                 qemu_free_timer(usb_auto_timer);
1294             }
1295
1296             return 0;
1297         }
1298
1299         prev = &pf->next;
1300         pf   = pf->next;
1301     }
1302
1303     return -1;
1304 }
1305
1306 typedef struct FindDeviceState {
1307     int vendor_id;
1308     int product_id;
1309     int bus_num;
1310     int addr;
1311     char product_name[PRODUCT_NAME_SZ];
1312 } FindDeviceState;
1313
1314 static int usb_host_find_device_scan(void *opaque, int bus_num, int addr,
1315                                      int class_id,
1316                                      int vendor_id, int product_id,
1317                                      const char *product_name, int speed)
1318 {
1319     FindDeviceState *s = opaque;
1320     if ((vendor_id == s->vendor_id &&
1321         product_id == s->product_id) ||
1322         (bus_num == s->bus_num &&
1323         addr == s->addr)) {
1324         pstrcpy(s->product_name, PRODUCT_NAME_SZ, product_name);
1325         s->bus_num = bus_num;
1326         s->addr = addr;
1327         return 1;
1328     } else {
1329         return 0;
1330     }
1331 }
1332
1333 /* the syntax is :
1334    'bus.addr' (decimal numbers) or
1335    'vendor_id:product_id' (hexa numbers) */
1336 static int usb_host_find_device(int *pbus_num, int *paddr,
1337                                 char *product_name, int product_name_size,
1338                                 const char *devname)
1339 {
1340     const char *p;
1341     int ret;
1342     FindDeviceState fs;
1343
1344     p = strchr(devname, '.');
1345     if (p) {
1346         *pbus_num = strtoul(devname, NULL, 0);
1347         *paddr = strtoul(p + 1, NULL, 0);
1348         fs.bus_num = *pbus_num;
1349         fs.addr = *paddr;
1350         ret = usb_host_scan(&fs, usb_host_find_device_scan);
1351         if (ret)
1352             pstrcpy(product_name, product_name_size, fs.product_name);
1353         return 0;
1354     }
1355
1356     p = strchr(devname, ':');
1357     if (p) {
1358         fs.vendor_id = strtoul(devname, NULL, 16);
1359         fs.product_id = strtoul(p + 1, NULL, 16);
1360         ret = usb_host_scan(&fs, usb_host_find_device_scan);
1361         if (ret) {
1362             *pbus_num = fs.bus_num;
1363             *paddr = fs.addr;
1364             pstrcpy(product_name, product_name_size, fs.product_name);
1365             return 0;
1366         }
1367     }
1368     return -1;
1369 }
1370
1371 /**********************/
1372 /* USB host device info */
1373
1374 struct usb_class_info {
1375     int class;
1376     const char *class_name;
1377 };
1378
1379 static const struct usb_class_info usb_class_info[] = {
1380     { USB_CLASS_AUDIO, "Audio"},
1381     { USB_CLASS_COMM, "Communication"},
1382     { USB_CLASS_HID, "HID"},
1383     { USB_CLASS_HUB, "Hub" },
1384     { USB_CLASS_PHYSICAL, "Physical" },
1385     { USB_CLASS_PRINTER, "Printer" },
1386     { USB_CLASS_MASS_STORAGE, "Storage" },
1387     { USB_CLASS_CDC_DATA, "Data" },
1388     { USB_CLASS_APP_SPEC, "Application Specific" },
1389     { USB_CLASS_VENDOR_SPEC, "Vendor Specific" },
1390     { USB_CLASS_STILL_IMAGE, "Still Image" },
1391     { USB_CLASS_CSCID, "Smart Card" },
1392     { USB_CLASS_CONTENT_SEC, "Content Security" },
1393     { -1, NULL }
1394 };
1395
1396 static const char *usb_class_str(uint8_t class)
1397 {
1398     const struct usb_class_info *p;
1399     for(p = usb_class_info; p->class != -1; p++) {
1400         if (p->class == class)
1401             break;
1402     }
1403     return p->class_name;
1404 }
1405
1406 static void usb_info_device(int bus_num, int addr, int class_id,
1407                             int vendor_id, int product_id,
1408                             const char *product_name,
1409                             int speed)
1410 {
1411     const char *class_str, *speed_str;
1412
1413     switch(speed) {
1414     case USB_SPEED_LOW:
1415         speed_str = "1.5";
1416         break;
1417     case USB_SPEED_FULL:
1418         speed_str = "12";
1419         break;
1420     case USB_SPEED_HIGH:
1421         speed_str = "480";
1422         break;
1423     default:
1424         speed_str = "?";
1425         break;
1426     }
1427
1428     term_printf("  Device %d.%d, speed %s Mb/s\n",
1429                 bus_num, addr, speed_str);
1430     class_str = usb_class_str(class_id);
1431     if (class_str)
1432         term_printf("    %s:", class_str);
1433     else
1434         term_printf("    Class %02x:", class_id);
1435     term_printf(" USB device %04x:%04x", vendor_id, product_id);
1436     if (product_name[0] != '\0')
1437         term_printf(", %s", product_name);
1438     term_printf("\n");
1439 }
1440
1441 static int usb_host_info_device(void *opaque, int bus_num, int addr,
1442                                 int class_id,
1443                                 int vendor_id, int product_id,
1444                                 const char *product_name,
1445                                 int speed)
1446 {
1447     usb_info_device(bus_num, addr, class_id, vendor_id, product_id,
1448                     product_name, speed);
1449     return 0;
1450 }
1451
1452 static void dec2str(int val, char *str, size_t size)
1453 {
1454     if (val == -1)
1455         snprintf(str, size, "*");
1456     else
1457         snprintf(str, size, "%d", val);
1458 }
1459
1460 static void hex2str(int val, char *str, size_t size)
1461 {
1462     if (val == -1)
1463         snprintf(str, size, "*");
1464     else
1465         snprintf(str, size, "%x", val);
1466 }
1467
1468 void usb_host_info(void)
1469 {
1470     struct USBAutoFilter *f;
1471
1472     usb_host_scan(NULL, usb_host_info_device);
1473
1474     if (usb_auto_filter)
1475         term_printf("  Auto filters:\n");
1476     for (f = usb_auto_filter; f; f = f->next) {
1477         char bus[10], addr[10], vid[10], pid[10];
1478         dec2str(f->bus_num, bus, sizeof(bus));
1479         dec2str(f->addr, addr, sizeof(addr));
1480         hex2str(f->vendor_id, vid, sizeof(vid));
1481         hex2str(f->product_id, pid, sizeof(pid));
1482         term_printf("    Device %s.%s ID %s:%s\n", bus, addr, vid, pid);
1483     }
1484 }
1485
1486 #else
1487
1488 #include "hw/usb.h"
1489
1490 void usb_host_info(void)
1491 {
1492     term_printf("USB host devices not supported\n");
1493 }
1494
1495 /* XXX: modify configure to compile the right host driver */
1496 USBDevice *usb_host_device_open(const char *devname)
1497 {
1498     return NULL;
1499 }
1500
1501 int usb_host_device_close(const char *devname)
1502 {
1503     return 0;
1504 }
1505
1506 #endif