qemu/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 #define __user
  35
  36 #include <dirent.h>
  37 #include <sys/ioctl.h>
  38 #include <signal.h>
  39
  40 #include <linux/usbdevice_fs.h>
  41 #include <linux/version.h>
  42 #include "hw/usb.h"
  43
  44 /* We redefine it to avoid version problems */
  45 struct usb_ctrltransfer {
  46     uint8_t  bRequestType;
  47     uint8_t  bRequest;
  48     uint16_t wValue;
  49     uint16_t wIndex;
  50     uint16_t wLength;
  51     uint32_t timeout;
  52     void *data;
  53 };
  54
  55 struct usb_ctrlrequest {
  56     uint8_t bRequestType;
  57     uint8_t bRequest;
  58     uint16_t wValue;
  59     uint16_t wIndex;
  60     uint16_t wLength;
  61 };
  62
  63 typedef int USBScanFunc(void *opaque, int bus_num, int addr, int class_id,
  64                         int vendor_id, int product_id,
  65                         const char *product_name, int speed);
  66 static int usb_host_find_device(int *pbus_num, int *paddr,
  67                                 char *product_name, int product_name_size,
  68                                 const char *devname);
  69 //#define DEBUG
  70
  71 #ifdef DEBUG
  72 #define dprintf printf
  73 #else
  74 #define dprintf(...)
  75 #endif
  76
  77 #define USBDEVFS_PATH "/proc/bus/usb"
  78 #define PRODUCT_NAME_SZ 32
  79 #define MAX_ENDPOINTS 16
  80
  81 /* endpoint association data */
  82 struct endp_data {
  83     uint8_t type;
  84     uint8_t halted;
  85 };
  86
  87 enum {
  88     CTRL_STATE_IDLE = 0,
  89     CTRL_STATE_SETUP,
  90     CTRL_STATE_DATA,
  91     CTRL_STATE_ACK
  92 };
  93
  94 /*
  95  * Control transfer state.
  96  * Note that 'buffer' _must_ follow 'req' field because
  97  * we need contigious buffer when we submit control URB.
  98  */
  99 struct ctrl_struct {
 100     uint16_t len;
 101     uint16_t offset;
 102     uint8_t  state;
 103     struct   usb_ctrlrequest req;
 104     uint8_t  buffer[1024];
 105 };
 106
 107 typedef struct USBHostDevice {
 108     USBDevice dev;
 109     int       fd;
 110
 111     uint8_t   descr[1024];
 112     int       descr_len;
 113     int       configuration;
 114     int       ninterfaces;
 115     int       closing;
 116
 117     struct ctrl_struct ctrl;
 118     struct endp_data endp_table[MAX_ENDPOINTS];
 119
 120     /* Host side address */
 121     int bus_num;
 122     int addr;
 123
 124     struct USBHostDevice *next;
 125 } USBHostDevice;
 126
 127 static int is_isoc(USBHostDevice *s, int ep)
 128 {
 129     return s->endp_table[ep - 1].type == USBDEVFS_URB_TYPE_ISO;
 130 }
 131
 132 static int is_halted(USBHostDevice *s, int ep)
 133 {
 134     return s->endp_table[ep - 1].halted;
 135 }
 136
 137 static void clear_halt(USBHostDevice *s, int ep)
 138 {
 139     s->endp_table[ep - 1].halted = 0;
 140 }
 141
 142 static void set_halt(USBHostDevice *s, int ep)
 143 {
 144     s->endp_table[ep - 1].halted = 1;
 145 }
 146
 147 static USBHostDevice *hostdev_list;
 148
 149 static void hostdev_link(USBHostDevice *dev)
 150 {
 151     dev->next = hostdev_list;
 152     hostdev_list = dev;
 153 }
 154
 155 static void hostdev_unlink(USBHostDevice *dev)
 156 {
 157     USBHostDevice *pdev = hostdev_list;
 158     USBHostDevice **prev = &hostdev_list;
 159
 160     while (pdev) {
 161         if (pdev == dev) {
 162             *prev = dev->next;
 163             return;
 164         }
 165
 166         prev = &pdev->next;
 167         pdev = pdev->next;
 168     }
 169 }
 170
 171 static USBHostDevice *hostdev_find(int bus_num, int addr)
 172 {
 173     USBHostDevice *s = hostdev_list;
 174     while (s) {
 175         if (s->bus_num == bus_num && s->addr == addr)
 176             return s;
 177         s = s->next;
 178     }
 179     return NULL;
 180 }
 181
 182 /*
 183  * Async URB state.
 184  * We always allocate one isoc descriptor even for bulk transfers
 185  * to simplify allocation and casts.
 186  */
 187 typedef struct AsyncURB
 188 {
 189     struct usbdevfs_urb urb;
 190     struct usbdevfs_iso_packet_desc isocpd;
 191
 192     USBPacket     *packet;
 193     USBHostDevice *hdev;
 194 } AsyncURB;
 195
 196 static AsyncURB *async_alloc(void)
 197 {
 198     return (AsyncURB *) qemu_mallocz(sizeof(AsyncURB));
 199 }
 200
 201 static void async_free(AsyncURB *aurb)
 202 {
 203     qemu_free(aurb);
 204 }
 205
 206 static void async_complete_ctrl(USBHostDevice *s, USBPacket *p)
 207 {
 208     switch(s->ctrl.state) {
 209     case CTRL_STATE_SETUP:
 210         if (p->len < s->ctrl.len)
 211             s->ctrl.len = p->len;
 212         s->ctrl.state = CTRL_STATE_DATA;
 213         p->len = 8;
 214         break;
 215
 216     case CTRL_STATE_ACK:
 217         s->ctrl.state = CTRL_STATE_IDLE;
 218         p->len = 0;
 219         break;
 220
 221     default:
 222         break;
 223     }
 224 }
 225
 226 static void async_complete(void *opaque)
 227 {
 228     USBHostDevice *s = opaque;
 229     AsyncURB *aurb;
 230
 231     while (1) {
 232         USBPacket *p;
 233
 234         int r = ioctl(s->fd, USBDEVFS_REAPURBNDELAY, &aurb);
 235         if (r < 0) {
 236             if (errno == EAGAIN)
 237                 return;
 238
 239             if (errno == ENODEV && !s->closing) {
 240                 printf("husb: device %d.%d disconnected\n", s->bus_num, s->addr);
 241                 usb_device_del_addr(0, s->dev.addr);
 242                 return;
 243             }
 244
 245             dprintf("husb: async. reap urb failed errno %d\n", errno);
 246             return;
 247         }
 248
 249         p = aurb->packet;
 250
 251         dprintf("husb: async completed. aurb %p status %d alen %d\n",
 252                 aurb, aurb->urb.status, aurb->urb.actual_length);
 253
 254         if (p) {
 255             switch (aurb->urb.status) {
 256             case 0:
 257                 p->len = aurb->urb.actual_length;
 258                 if (aurb->urb.type == USBDEVFS_URB_TYPE_CONTROL)
 259                     async_complete_ctrl(s, p);
 260                 break;
 261
 262             case -EPIPE:
 263                 set_halt(s, p->devep);
 264                 /* fall through */
 265             default:
 266                 p->len = USB_RET_NAK;
 267                 break;
 268             }
 269
 270             usb_packet_complete(p);
 271         }
 272
 273         async_free(aurb);
 274     }
 275 }
 276
 277 static void async_cancel(USBPacket *unused, void *opaque)
 278 {
 279     AsyncURB *aurb = opaque;
 280     USBHostDevice *s = aurb->hdev;
 281
 282     dprintf("husb: async cancel. aurb %p\n", aurb);
 283
 284     /* Mark it as dead (see async_complete above) */
 285     aurb->packet = NULL;
 286
 287     int r = ioctl(s->fd, USBDEVFS_DISCARDURB, aurb);
 288     if (r < 0) {
 289         dprintf("husb: async. discard urb failed errno %d\n", errno);
 290     }
 291 }
 292
 293 static int usb_host_claim_interfaces(USBHostDevice *dev, int configuration)
 294 {
 295     int dev_descr_len, config_descr_len;
 296     int interface, nb_interfaces, nb_configurations;
 297     int ret, i;
 298
 299     if (configuration == 0) /* address state - ignore */
 300         return 1;
 301
 302     dprintf("husb: claiming interfaces. config %d\n", configuration);
 303
 304     i = 0;
 305     dev_descr_len = dev->descr[0];
 306     if (dev_descr_len > dev->descr_len)
 307         goto fail;
 308     nb_configurations = dev->descr[17];
 309
 310     i += dev_descr_len;
 311     while (i < dev->descr_len) {
 312         dprintf("husb: i is %d, descr_len is %d, dl %d, dt %d\n", i, dev->descr_len,
 313                dev->descr[i], dev->descr[i+1]);
 314
 315         if (dev->descr[i+1] != USB_DT_CONFIG) {
 316             i += dev->descr[i];
 317             continue;
 318         }
 319         config_descr_len = dev->descr[i];
 320
 321         printf("husb: config #%d need %d\n", dev->descr[i + 5], configuration);
 322
 323         if (configuration < 0 || configuration == dev->descr[i + 5]) {
 324             configuration = dev->descr[i + 5];
 325             break;
 326         }
 327
 328         i += config_descr_len;
 329     }
 330
 331     if (i >= dev->descr_len) {
 332         fprintf(stderr, "husb: update iface failed. no matching configuration\n");
 333         goto fail;
 334     }
 335     nb_interfaces = dev->descr[i + 4];
 336
 337 #ifdef USBDEVFS_DISCONNECT
 338     /* earlier Linux 2.4 do not support that */
 339     {
 340         struct usbdevfs_ioctl ctrl;
 341         for (interface = 0; interface < nb_interfaces; interface++) {
 342             ctrl.ioctl_code = USBDEVFS_DISCONNECT;
 343             ctrl.ifno = interface;
 344             ret = ioctl(dev->fd, USBDEVFS_IOCTL, &ctrl);
 345             if (ret < 0 && errno != ENODATA) {
 346                 perror("USBDEVFS_DISCONNECT");
 347                 goto fail;
 348             }
 349         }
 350     }
 351 #endif
 352
 353     /* XXX: only grab if all interfaces are free */
 354     for (interface = 0; interface < nb_interfaces; interface++) {
 355         ret = ioctl(dev->fd, USBDEVFS_CLAIMINTERFACE, &interface);
 356         if (ret < 0) {
 357             if (errno == EBUSY) {
 358                 printf("husb: update iface. device already grabbed\n");
 359             } else {
 360                 perror("husb: failed to claim interface");
 361             }
 362         fail:
 363             return 0;
 364         }
 365     }
 366
 367     printf("husb: %d interfaces claimed for configuration %d\n",
 368            nb_interfaces, configuration);
 369
 370     dev->ninterfaces   = nb_interfaces;
 371     dev->configuration = configuration;
 372     return 1;
 373 }
 374
 375 static int usb_host_release_interfaces(USBHostDevice *s)
 376 {
 377     int ret, i;
 378
 379     dprintf("husb: releasing interfaces\n");
 380
 381     for (i = 0; i < s->ninterfaces; i++) {
 382         ret = ioctl(s->fd, USBDEVFS_RELEASEINTERFACE, &i);
 383         if (ret < 0) {
 384             perror("husb: failed to release interface");
 385             return 0;
 386         }
 387     }
 388
 389     return 1;
 390 }
 391
 392 static void usb_host_handle_reset(USBDevice *dev)
 393 {
 394     USBHostDevice *s = (USBHostDevice *) dev;
 395
 396     dprintf("husb: reset device %u.%u\n", s->bus_num, s->addr);
 397
 398     ioctl(s->fd, USBDEVFS_RESET);
 399
 400     usb_host_claim_interfaces(s, s->configuration);
 401 }
 402
 403 static void usb_host_handle_destroy(USBDevice *dev)
 404 {
 405     USBHostDevice *s = (USBHostDevice *)dev;
 406
 407     s->closing = 1;
 408
 409     qemu_set_fd_handler(s->fd, NULL, NULL, NULL);
 410
 411     hostdev_unlink(s);
 412
 413     async_complete(s);
 414
 415     if (s->fd >= 0)
 416         close(s->fd);
 417
 418     qemu_free(s);
 419 }
 420
 421 static int usb_linux_update_endp_table(USBHostDevice *s);
 422
 423 static int usb_host_handle_data(USBHostDevice *s, USBPacket *p)
 424 {
 425     struct usbdevfs_urb *urb;
 426     AsyncURB *aurb;
 427     int ret;
 428
 429     aurb = async_alloc();
 430     if (!aurb) {
 431         dprintf("husb: async malloc failed\n");
 432         return USB_RET_NAK;
 433     }
 434     aurb->hdev   = s;
 435     aurb->packet = p;
 436
 437     urb = &aurb->urb;
 438
 439     if (p->pid == USB_TOKEN_IN)
 440         urb->endpoint = p->devep | 0x80;
 441     else
 442         urb->endpoint = p->devep;
 443
 444     if (is_halted(s, p->devep)) {
 445         ret = ioctl(s->fd, USBDEVFS_CLEAR_HALT, &urb->endpoint);
 446         if (ret < 0) {
 447             dprintf("husb: failed to clear halt. ep 0x%x errno %d\n",
 448                    urb->endpoint, errno);
 449             return USB_RET_NAK;
 450         }
 451         clear_halt(s, p->devep);
 452     }
 453
 454     urb->buffer        = p->data;
 455     urb->buffer_length = p->len;
 456
 457     if (is_isoc(s, p->devep)) {
 458         /* Setup ISOC transfer */
 459         urb->type     = USBDEVFS_URB_TYPE_ISO;
 460         urb->flags    = USBDEVFS_URB_ISO_ASAP;
 461         urb->number_of_packets = 1;
 462         urb->iso_frame_desc[0].length = p->len;
 463     } else {
 464         /* Setup bulk transfer */
 465         urb->type     = USBDEVFS_URB_TYPE_BULK;
 466     }
 467
 468     urb->usercontext = s;
 469
 470     ret = ioctl(s->fd, USBDEVFS_SUBMITURB, urb);
 471
 472     dprintf("husb: data submit. ep 0x%x len %u aurb %p\n", urb->endpoint, p->len, aurb);
 473
 474     if (ret < 0) {
 475         dprintf("husb: submit failed. errno %d\n", errno);
 476         async_free(aurb);
 477
 478         switch(errno) {
 479         case ETIMEDOUT:
 480             return USB_RET_NAK;
 481         case EPIPE:
 482         default:
 483             return USB_RET_STALL;
 484         }
 485     }
 486
 487     usb_defer_packet(p, async_cancel, aurb);
 488     return USB_RET_ASYNC;
 489 }
 490
 491 static int ctrl_error(void)
 492 {
 493     if (errno == ETIMEDOUT)
 494         return USB_RET_NAK;
 495     else
 496         return USB_RET_STALL;
 497 }
 498
 499 static int usb_host_set_address(USBHostDevice *s, int addr)
 500 {
 501     dprintf("husb: ctrl set addr %u\n", addr);
 502     s->dev.addr = addr;
 503     return 0;
 504 }
 505
 506 static int usb_host_set_config(USBHostDevice *s, int config)
 507 {
 508     usb_host_release_interfaces(s);
 509
 510     int ret = ioctl(s->fd, USBDEVFS_SETCONFIGURATION, &config);
 511
 512     dprintf("husb: ctrl set config %d ret %d errno %d\n", config, ret, errno);
 513
 514     if (ret < 0)
 515         return ctrl_error();
 516
 517     usb_host_claim_interfaces(s, config);
 518     return 0;
 519 }
 520
 521 static int usb_host_set_interface(USBHostDevice *s, int iface, int alt)
 522 {
 523     struct usbdevfs_setinterface si;
 524     int ret;
 525
 526     si.interface  = iface;
 527     si.altsetting = alt;
 528     ret = ioctl(s->fd, USBDEVFS_SETINTERFACE, &si);
 529
 530     dprintf("husb: ctrl set iface %d altset %d ret %d errno %d\n",
 531         iface, alt, ret, errno);
 532
 533     if (ret < 0)
 534         return ctrl_error();
 535
 536     usb_linux_update_endp_table(s);
 537     return 0;
 538 }
 539
 540 static int usb_host_handle_control(USBHostDevice *s, USBPacket *p)
 541 {
 542     struct usbdevfs_urb *urb;
 543     AsyncURB *aurb;
 544     int ret, value, index;
 545
 546     /*
 547      * Process certain standard device requests.
 548      * These are infrequent and are processed synchronously.
 549      */
 550     value = le16_to_cpu(s->ctrl.req.wValue);
 551     index = le16_to_cpu(s->ctrl.req.wIndex);
 552
 553     dprintf("husb: ctrl type 0x%x req 0x%x val 0x%x index %u len %u\n",
 554         s->ctrl.req.bRequestType, s->ctrl.req.bRequest, value, index,
 555         s->ctrl.len);
 556
 557     if (s->ctrl.req.bRequestType == 0) {
 558         switch (s->ctrl.req.bRequest) {
 559         case USB_REQ_SET_ADDRESS:
 560             return usb_host_set_address(s, value);
 561
 562         case USB_REQ_SET_CONFIGURATION:
 563             return usb_host_set_config(s, value & 0xff);
 564         }
 565     }
 566
 567     if (s->ctrl.req.bRequestType == 1 &&
 568                   s->ctrl.req.bRequest == USB_REQ_SET_INTERFACE)
 569         return usb_host_set_interface(s, index, value);
 570
 571     /* The rest are asynchronous */
 572
 573     aurb = async_alloc();
 574     if (!aurb) {
 575         dprintf("husb: async malloc failed\n");
 576         return USB_RET_NAK;
 577     }
 578     aurb->hdev   = s;
 579     aurb->packet = p;
 580
 581     /*
 582      * Setup ctrl transfer.
 583      *
 584      * s->ctrl is layed out such that data buffer immediately follows
 585      * 'req' struct which is exactly what usbdevfs expects.
 586      */
 587     urb = &aurb->urb;
 588
 589     urb->type     = USBDEVFS_URB_TYPE_CONTROL;
 590     urb->endpoint = p->devep;
 591
 592     urb->buffer        = &s->ctrl.req;
 593     urb->buffer_length = 8 + s->ctrl.len;
 594
 595     urb->usercontext = s;
 596
 597     ret = ioctl(s->fd, USBDEVFS_SUBMITURB, urb);
 598
 599     dprintf("husb: submit ctrl. len %u aurb %p\n", urb->buffer_length, aurb);
 600
 601     if (ret < 0) {
 602         dprintf("husb: submit failed. errno %d\n", errno);
 603         async_free(aurb);
 604
 605         switch(errno) {
 606         case ETIMEDOUT:
 607             return USB_RET_NAK;
 608         case EPIPE:
 609         default:
 610             return USB_RET_STALL;
 611         }
 612     }
 613
 614     usb_defer_packet(p, async_cancel, aurb);
 615     return USB_RET_ASYNC;
 616 }
 617
 618 static int do_token_setup(USBDevice *dev, USBPacket *p)
 619 {
 620     USBHostDevice *s = (USBHostDevice *) dev;
 621     int ret = 0;
 622
 623     if (p->len != 8)
 624         return USB_RET_STALL;
 625
 626     memcpy(&s->ctrl.req, p->data, 8);
 627     s->ctrl.len    = le16_to_cpu(s->ctrl.req.wLength);
 628     s->ctrl.offset = 0;
 629     s->ctrl.state  = CTRL_STATE_SETUP;
 630
 631     if (s->ctrl.req.bRequestType & USB_DIR_IN) {
 632         ret = usb_host_handle_control(s, p);
 633         if (ret < 0)
 634             return ret;
 635
 636         if (ret < s->ctrl.len)
 637             s->ctrl.len = ret;
 638         s->ctrl.state = CTRL_STATE_DATA;
 639     } else {
 640         if (s->ctrl.len == 0)
 641             s->ctrl.state = CTRL_STATE_ACK;
 642         else
 643             s->ctrl.state = CTRL_STATE_DATA;
 644     }
 645
 646     return ret;
 647 }
 648
 649 static int do_token_in(USBDevice *dev, USBPacket *p)
 650 {
 651     USBHostDevice *s = (USBHostDevice *) dev;
 652     int ret = 0;
 653
 654     if (p->devep != 0)
 655         return usb_host_handle_data(s, p);
 656
 657     switch(s->ctrl.state) {
 658     case CTRL_STATE_ACK:
 659         if (!(s->ctrl.req.bRequestType & USB_DIR_IN)) {
 660             ret = usb_host_handle_control(s, p);
 661             if (ret == USB_RET_ASYNC)
 662                 return USB_RET_ASYNC;
 663
 664             s->ctrl.state = CTRL_STATE_IDLE;
 665             return ret > 0 ? 0 : ret;
 666         }
 667
 668         return 0;
 669
 670     case CTRL_STATE_DATA:
 671         if (s->ctrl.req.bRequestType & USB_DIR_IN) {
 672             int len = s->ctrl.len - s->ctrl.offset;
 673             if (len > p->len)
 674                 len = p->len;
 675             memcpy(p->data, s->ctrl.buffer + s->ctrl.offset, len);
 676             s->ctrl.offset += len;
 677             if (s->ctrl.offset >= s->ctrl.len)
 678                 s->ctrl.state = CTRL_STATE_ACK;
 679             return len;
 680         }
 681
 682         s->ctrl.state = CTRL_STATE_IDLE;
 683         return USB_RET_STALL;
 684
 685     default:
 686         return USB_RET_STALL;
 687     }
 688 }
 689
 690 static int do_token_out(USBDevice *dev, USBPacket *p)
 691 {
 692     USBHostDevice *s = (USBHostDevice *) dev;
 693
 694     if (p->devep != 0)
 695         return usb_host_handle_data(s, p);
 696
 697     switch(s->ctrl.state) {
 698     case CTRL_STATE_ACK:
 699         if (s->ctrl.req.bRequestType & USB_DIR_IN) {
 700             s->ctrl.state = CTRL_STATE_IDLE;
 701             /* transfer OK */
 702         } else {
 703             /* ignore additional output */
 704         }
 705         return 0;
 706
 707     case CTRL_STATE_DATA:
 708         if (!(s->ctrl.req.bRequestType & USB_DIR_IN)) {
 709             int len = s->ctrl.len - s->ctrl.offset;
 710             if (len > p->len)
 711                 len = p->len;
 712             memcpy(s->ctrl.buffer + s->ctrl.offset, p->data, len);
 713             s->ctrl.offset += len;
 714             if (s->ctrl.offset >= s->ctrl.len)
 715                 s->ctrl.state = CTRL_STATE_ACK;
 716             return len;
 717         }
 718
 719         s->ctrl.state = CTRL_STATE_IDLE;
 720         return USB_RET_STALL;
 721
 722     default:
 723         return USB_RET_STALL;
 724     }
 725 }
 726
 727 /*
 728  * Packet handler.
 729  * Called by the HC (host controller).
 730  *
 731  * Returns length of the transaction or one of the USB_RET_XXX codes.
 732  */
 733 static int usb_host_handle_packet(USBDevice *s, USBPacket *p)
 734 {
 735     switch(p->pid) {
 736     case USB_MSG_ATTACH:
 737         s->state = USB_STATE_ATTACHED;
 738         return 0;
 739
 740     case USB_MSG_DETACH:
 741         s->state = USB_STATE_NOTATTACHED;
 742         return 0;
 743
 744     case USB_MSG_RESET:
 745         s->remote_wakeup = 0;
 746         s->addr = 0;
 747         s->state = USB_STATE_DEFAULT;
 748         s->handle_reset(s);
 749         return 0;
 750     }
 751
 752     /* Rest of the PIDs must match our address */
 753     if (s->state < USB_STATE_DEFAULT || p->devaddr != s->addr)
 754         return USB_RET_NODEV;
 755
 756     switch (p->pid) {
 757     case USB_TOKEN_SETUP:
 758         return do_token_setup(s, p);
 759
 760     case USB_TOKEN_IN:
 761         return do_token_in(s, p);
 762
 763     case USB_TOKEN_OUT:
 764         return do_token_out(s, p);
 765
 766     default:
 767         return USB_RET_STALL;
 768     }
 769 }
 770
 771 /* returns 1 on problem encountered or 0 for success */
 772 static int usb_linux_update_endp_table(USBHostDevice *s)
 773 {
 774     uint8_t *descriptors;
 775     uint8_t devep, type, configuration, alt_interface;
 776     struct usbdevfs_ctrltransfer ct;
 777     int interface, ret, length, i;
 778
 779     ct.bRequestType = USB_DIR_IN;
 780     ct.bRequest = USB_REQ_GET_CONFIGURATION;
 781     ct.wValue = 0;
 782     ct.wIndex = 0;
 783     ct.wLength = 1;
 784     ct.data = &configuration;
 785     ct.timeout = 50;
 786
 787     ret = ioctl(s->fd, USBDEVFS_CONTROL, &ct);
 788     if (ret < 0) {
 789         perror("usb_linux_update_endp_table");
 790         return 1;
 791     }
 792
 793     /* in address state */
 794     if (configuration == 0)
 795         return 1;
 796
 797     /* get the desired configuration, interface, and endpoint descriptors
 798      * from device description */
 799     descriptors = &s->descr[18];
 800     length = s->descr_len - 18;
 801     i = 0;
 802
 803     if (descriptors[i + 1] != USB_DT_CONFIG ||
 804         descriptors[i + 5] != configuration) {
 805         dprintf("invalid descriptor data - configuration\n");
 806         return 1;
 807     }
 808     i += descriptors[i];
 809
 810     while (i < length) {
 811         if (descriptors[i + 1] != USB_DT_INTERFACE ||
 812             (descriptors[i + 1] == USB_DT_INTERFACE &&
 813              descriptors[i + 4] == 0)) {
 814             i += descriptors[i];
 815             continue;
 816         }
 817
 818         interface = descriptors[i + 2];
 819
 820         ct.bRequestType = USB_DIR_IN | USB_RECIP_INTERFACE;
 821         ct.bRequest = USB_REQ_GET_INTERFACE;
 822         ct.wValue = 0;
 823         ct.wIndex = interface;
 824         ct.wLength = 1;
 825         ct.data = &alt_interface;
 826         ct.timeout = 50;
 827
 828         ret = ioctl(s->fd, USBDEVFS_CONTROL, &ct);
 829         if (ret < 0) {
 830             perror("usb_linux_update_endp_table");
 831             return 1;
 832         }
 833
 834         /* the current interface descriptor is the active interface
 835          * and has endpoints */
 836         if (descriptors[i + 3] != alt_interface) {
 837             i += descriptors[i];
 838             continue;
 839         }
 840
 841         /* advance to the endpoints */
 842         while (i < length && descriptors[i +1] != USB_DT_ENDPOINT)
 843             i += descriptors[i];
 844
 845         if (i >= length)
 846             break;
 847
 848         while (i < length) {
 849             if (descriptors[i + 1] != USB_DT_ENDPOINT)
 850                 break;
 851
 852             devep = descriptors[i + 2];
 853             switch (descriptors[i + 3] & 0x3) {
 854             case 0x00:
 855                 type = USBDEVFS_URB_TYPE_CONTROL;
 856                 break;
 857             case 0x01:
 858                 type = USBDEVFS_URB_TYPE_ISO;
 859                 break;
 860             case 0x02:
 861                 type = USBDEVFS_URB_TYPE_BULK;
 862                 break;
 863             case 0x03:
 864                 type = USBDEVFS_URB_TYPE_INTERRUPT;
 865                 break;
 866             default:
 867                 dprintf("usb_host: malformed endpoint type\n");
 868                 type = USBDEVFS_URB_TYPE_BULK;
 869             }
 870             s->endp_table[(devep & 0xf) - 1].type = type;
 871             s->endp_table[(devep & 0xf) - 1].halted = 0;
 872
 873             i += descriptors[i];
 874         }
 875     }
 876     return 0;
 877 }
 878
 879 static USBDevice *usb_host_device_open_addr(int bus_num, int addr, const char *prod_name)
 880 {
 881     int fd = -1, ret;
 882     USBHostDevice *dev = NULL;
 883     struct usbdevfs_connectinfo ci;
 884     char buf[1024];
 885
 886     dev = qemu_mallocz(sizeof(USBHostDevice));
 887     if (!dev)
 888         goto fail;
 889
 890     dev->bus_num = bus_num;
 891     dev->addr = addr;
 892
 893     printf("husb: open device %d.%d\n", bus_num, addr);
 894
 895     snprintf(buf, sizeof(buf), USBDEVFS_PATH "/%03d/%03d",
 896              bus_num, addr);
 897     fd = open(buf, O_RDWR | O_NONBLOCK);
 898     if (fd < 0) {
 899         perror(buf);
 900         goto fail;
 901     }
 902
 903     /* read the device description */
 904     dev->descr_len = read(fd, dev->descr, sizeof(dev->descr));
 905     if (dev->descr_len <= 0) {
 906         perror("husb: reading device data failed");
 907         goto fail;
 908     }
 909
 910 #ifdef DEBUG
 911     {
 912         int x;
 913         printf("=== begin dumping device descriptor data ===\n");
 914         for (x = 0; x < dev->descr_len; x++)
 915             printf("%02x ", dev->descr[x]);
 916         printf("\n=== end dumping device descriptor data ===\n");
 917     }
 918 #endif
 919
 920     dev->fd = fd;
 921
 922     /*
 923      * Initial configuration is -1 which makes us claim first
 924      * available config. We used to start with 1, which does not
 925      * always work. I've seen devices where first config starts
 926      * with 2.
 927      */
 928     if (!usb_host_claim_interfaces(dev, -1))
 929         goto fail;
 930
 931     ret = ioctl(fd, USBDEVFS_CONNECTINFO, &ci);
 932     if (ret < 0) {
 933         perror("usb_host_device_open: USBDEVFS_CONNECTINFO");
 934         goto fail;
 935     }
 936
 937     printf("husb: grabbed usb device %d.%d\n", bus_num, addr);
 938
 939     ret = usb_linux_update_endp_table(dev);
 940     if (ret)
 941         goto fail;
 942
 943     if (ci.slow)
 944         dev->dev.speed = USB_SPEED_LOW;
 945     else
 946         dev->dev.speed = USB_SPEED_HIGH;
 947
 948     dev->dev.handle_packet  = usb_host_handle_packet;
 949     dev->dev.handle_reset   = usb_host_handle_reset;
 950     dev->dev.handle_destroy = usb_host_handle_destroy;
 951
 952     if (!prod_name || prod_name[0] == '\0')
 953         snprintf(dev->dev.devname, sizeof(dev->dev.devname),
 954                  "host:%d.%d", bus_num, addr);
 955     else
 956         pstrcpy(dev->dev.devname, sizeof(dev->dev.devname),
 957                 prod_name);
 958
 959     /* USB devio uses 'write' flag to check for async completions */
 960     qemu_set_fd_handler(dev->fd, NULL, async_complete, dev);
 961
 962     hostdev_link(dev);
 963
 964     return (USBDevice *) dev;
 965
 966 fail:
 967     if (dev)
 968         qemu_free(dev);
 969
 970     close(fd);
 971     return NULL;
 972 }
 973
 974 static int usb_host_auto_add(const char *spec);
 975 static int usb_host_auto_del(const char *spec);
 976
 977 USBDevice *usb_host_device_open(const char *devname)
 978 {
 979     int bus_num, addr;
 980     char product_name[PRODUCT_NAME_SZ];
 981
 982     if (strstr(devname, "auto:")) {
 983         usb_host_auto_add(devname);
 984         return NULL;
 985     }
 986
 987     if (usb_host_find_device(&bus_num, &addr, product_name, sizeof(product_name),
 988                              devname) < 0)
 989         return NULL;
 990
 991     if (hostdev_find(bus_num, addr)) {
 992        term_printf("husb: host usb device %d.%d is already open\n", bus_num, addr);
 993        return NULL;
 994     }
 995
 996     return usb_host_device_open_addr(bus_num, addr, product_name);
 997 }
 998
 999 int usb_host_device_close(const char *devname)
1000 {
1001     char product_name[PRODUCT_NAME_SZ];
1002     int bus_num, addr;
1003     USBHostDevice *s;
1004
1005     if (strstr(devname, "auto:"))
1006         return usb_host_auto_del(devname);
1007
1008     if (usb_host_find_device(&bus_num, &addr, product_name, sizeof(product_name),
1009                              devname) < 0)
1010         return -1;
1011
1012     s = hostdev_find(bus_num, addr);
1013     if (s) {
1014         usb_device_del_addr(0, s->dev.addr);
1015         return 0;
1016     }
1017
1018     return -1;
1019 }
1020
1021 static int get_tag_value(char *buf, int buf_size,
1022                          const char *str, const char *tag,
1023                          const char *stopchars)
1024 {
1025     const char *p;
1026     char *q;
1027     p = strstr(str, tag);
1028     if (!p)
1029         return -1;
1030     p += strlen(tag);
1031     while (isspace(*p))
1032         p++;
1033     q = buf;
1034     while (*p != '\0' && !strchr(stopchars, *p)) {
1035         if ((q - buf) < (buf_size - 1))
1036             *q++ = *p;
1037         p++;
1038     }
1039     *q = '\0';
1040     return q - buf;
1041 }
1042
1043 static int usb_host_scan(void *opaque, USBScanFunc *func)
1044 {
1045     FILE *f;
1046     char line[1024];
1047     char buf[1024];
1048     int bus_num, addr, speed, device_count, class_id, product_id, vendor_id;
1049     int ret;
1050     char product_name[512];
1051
1052     f = fopen(USBDEVFS_PATH "/devices", "r");
1053     if (!f) {
1054         term_printf("husb: could not open %s\n", USBDEVFS_PATH "/devices");
1055         return 0;
1056     }
1057     device_count = 0;
1058     bus_num = addr = speed = class_id = product_id = vendor_id = 0;
1059     ret = 0;
1060     for(;;) {
1061         if (fgets(line, sizeof(line), f) == NULL)
1062             break;
1063         if (strlen(line) > 0)
1064             line[strlen(line) - 1] = '\0';
1065         if (line[0] == 'T' && line[1] == ':') {
1066             if (device_count && (vendor_id || product_id)) {
1067                 /* New device.  Add the previously discovered device.  */
1068                 ret = func(opaque, bus_num, addr, class_id, vendor_id,
1069                            product_id, product_name, speed);
1070                 if (ret)
1071                     goto the_end;
1072             }
1073             if (get_tag_value(buf, sizeof(buf), line, "Bus=", " ") < 0)
1074                 goto fail;
1075             bus_num = atoi(buf);
1076             if (get_tag_value(buf, sizeof(buf), line, "Dev#=", " ") < 0)
1077                 goto fail;
1078             addr = atoi(buf);
1079             if (get_tag_value(buf, sizeof(buf), line, "Spd=", " ") < 0)
1080                 goto fail;
1081             if (!strcmp(buf, "480"))
1082                 speed = USB_SPEED_HIGH;
1083             else if (!strcmp(buf, "1.5"))
1084                 speed = USB_SPEED_LOW;
1085             else
1086                 speed = USB_SPEED_FULL;
1087             product_name[0] = '\0';
1088             class_id = 0xff;
1089             device_count++;
1090             product_id = 0;
1091             vendor_id = 0;
1092         } else if (line[0] == 'P' && line[1] == ':') {
1093             if (get_tag_value(buf, sizeof(buf), line, "Vendor=", " ") < 0)
1094                 goto fail;
1095             vendor_id = strtoul(buf, NULL, 16);
1096             if (get_tag_value(buf, sizeof(buf), line, "ProdID=", " ") < 0)
1097                 goto fail;
1098             product_id = strtoul(buf, NULL, 16);
1099         } else if (line[0] == 'S' && line[1] == ':') {
1100             if (get_tag_value(buf, sizeof(buf), line, "Product=", "") < 0)
1101                 goto fail;
1102             pstrcpy(product_name, sizeof(product_name), buf);
1103         } else if (line[0] == 'D' && line[1] == ':') {
1104             if (get_tag_value(buf, sizeof(buf), line, "Cls=", " (") < 0)
1105                 goto fail;
1106             class_id = strtoul(buf, NULL, 16);
1107         }
1108     fail: ;
1109     }
1110     if (device_count && (vendor_id || product_id)) {
1111         /* Add the last device.  */
1112         ret = func(opaque, bus_num, addr, class_id, vendor_id,
1113                    product_id, product_name, speed);
1114     }
1115  the_end:
1116     fclose(f);
1117     return ret;
1118 }
1119
1120 struct USBAutoFilter {
1121     struct USBAutoFilter *next;
1122     int bus_num;
1123     int addr;
1124     int vendor_id;
1125     int product_id;
1126 };
1127
1128 static QEMUTimer *usb_auto_timer;
1129 static struct USBAutoFilter *usb_auto_filter;
1130
1131 static int usb_host_auto_scan(void *opaque, int bus_num, int addr,
1132                      int class_id, int vendor_id, int product_id,
1133                      const char *product_name, int speed)
1134 {
1135     struct USBAutoFilter *f;
1136     struct USBDevice *dev;
1137
1138     /* Ignore hubs */
1139     if (class_id == 9)
1140         return 0;
1141
1142     for (f = usb_auto_filter; f; f = f->next) {
1143         if (f->bus_num >= 0 && f->bus_num != bus_num)
1144             continue;
1145
1146         if (f->addr >= 0 && f->addr != addr)
1147             continue;
1148
1149         if (f->vendor_id >= 0 && f->vendor_id != vendor_id)
1150             continue;
1151
1152         if (f->product_id >= 0 && f->product_id != product_id)
1153             continue;
1154
1155         /* We got a match */
1156
1157         /* Allredy attached ? */
1158         if (hostdev_find(bus_num, addr))
1159             return 0;
1160
1161         dprintf("husb: auto open: bus_num %d addr %d\n", bus_num, addr);
1162
1163         dev = usb_host_device_open_addr(bus_num, addr, product_name);
1164         if (dev)
1165             usb_device_add_dev(dev);
1166     }
1167
1168     return 0;
1169 }
1170
1171 static void usb_host_auto_timer(void *unused)
1172 {
1173     usb_host_scan(NULL, usb_host_auto_scan);
1174     qemu_mod_timer(usb_auto_timer, qemu_get_clock(rt_clock) + 2000);
1175 }
1176
1177 /*
1178  * Autoconnect filter
1179  * Format:
1180  *    auto:bus:dev[:vid:pid]
1181  *    auto:bus.dev[:vid:pid]
1182  *
1183  *    bus  - bus number    (dec, * means any)
1184  *    dev  - device number (dec, * means any)
1185  *    vid  - vendor id     (hex, * means any)
1186  *    pid  - product id    (hex, * means any)
1187  *
1188  *    See 'lsusb' output.
1189  */
1190 static int parse_filter(const char *spec, struct USBAutoFilter *f)
1191 {
1192     enum { BUS, DEV, VID, PID, DONE };
1193     const char *p = spec;
1194     int i;
1195
1196     f->bus_num    = -1;
1197     f->addr       = -1;
1198     f->vendor_id  = -1;
1199     f->product_id = -1;
1200
1201     for (i = BUS; i < DONE; i++) {
1202         p = strpbrk(p, ":.");
1203         if (!p) break;
1204         p++;
1205
1206         if (*p == '*')
1207             continue;
1208
1209         switch(i) {
1210         case BUS: f->bus_num = strtol(p, NULL, 10);    break;
1211         case DEV: f->addr    = strtol(p, NULL, 10);    break;
1212         case VID: f->vendor_id  = strtol(p, NULL, 16); break;
1213         case PID: f->product_id = strtol(p, NULL, 16); break;
1214         }
1215     }
1216
1217     if (i < DEV) {
1218         fprintf(stderr, "husb: invalid auto filter spec %s\n", spec);
1219         return -1;
1220     }
1221
1222     return 0;
1223 }
1224
1225 static int match_filter(const struct USBAutoFilter *f1,
1226                         const struct USBAutoFilter *f2)
1227 {
1228     return f1->bus_num    == f2->bus_num &&
1229            f1->addr       == f2->addr &&
1230            f1->vendor_id  == f2->vendor_id &&
1231            f1->product_id == f2->product_id;
1232 }
1233
1234 static int usb_host_auto_add(const char *spec)
1235 {
1236     struct USBAutoFilter filter, *f;
1237
1238     if (parse_filter(spec, &filter) < 0)
1239         return -1;
1240
1241     f = qemu_mallocz(sizeof(*f));
1242     if (!f) {
1243         fprintf(stderr, "husb: failed to allocate auto filter\n");
1244         return -1;
1245     }
1246
1247     *f = filter;
1248
1249     if (!usb_auto_filter) {
1250         /*
1251          * First entry. Init and start the monitor.
1252          * Right now we're using timer to check for new devices.
1253          * If this turns out to be too expensive we can move that into a
1254          * separate thread.
1255          */
1256         usb_auto_timer = qemu_new_timer(rt_clock, usb_host_auto_timer, NULL);
1257         if (!usb_auto_timer) {
1258             fprintf(stderr, "husb: failed to allocate auto scan timer\n");
1259             qemu_free(f);
1260             return -1;
1261         }
1262
1263         /* Check for new devices every two seconds */
1264         qemu_mod_timer(usb_auto_timer, qemu_get_clock(rt_clock) + 2000);
1265     }
1266
1267     dprintf("husb: added auto filter: bus_num %d addr %d vid %d pid %d\n",
1268         f->bus_num, f->addr, f->vendor_id, f->product_id);
1269
1270     f->next = usb_auto_filter;
1271     usb_auto_filter = f;
1272
1273     return 0;
1274 }
1275
1276 static int usb_host_auto_del(const char *spec)
1277 {
1278     struct USBAutoFilter *pf = usb_auto_filter;
1279     struct USBAutoFilter **prev = &usb_auto_filter;
1280     struct USBAutoFilter filter;
1281
1282     if (parse_filter(spec, &filter) < 0)
1283         return -1;
1284
1285     while (pf) {
1286         if (match_filter(pf, &filter)) {
1287             dprintf("husb: removed auto filter: bus_num %d addr %d vid %d pid %d\n",
1288                      pf->bus_num, pf->addr, pf->vendor_id, pf->product_id);
1289
1290             *prev = pf->next;
1291
1292             if (!usb_auto_filter) {
1293                 /* No more filters. Stop scanning. */
1294                 qemu_del_timer(usb_auto_timer);
1295                 qemu_free_timer(usb_auto_timer);
1296             }
1297
1298             return 0;
1299         }
1300
1301         prev = &pf->next;
1302         pf   = pf->next;
1303     }
1304
1305     return -1;
1306 }
1307
1308 typedef struct FindDeviceState {
1309     int vendor_id;
1310     int product_id;
1311     int bus_num;
1312     int addr;
1313     char product_name[PRODUCT_NAME_SZ];
1314 } FindDeviceState;
1315
1316 static int usb_host_find_device_scan(void *opaque, int bus_num, int addr,
1317                                      int class_id,
1318                                      int vendor_id, int product_id,
1319                                      const char *product_name, int speed)
1320 {
1321     FindDeviceState *s = opaque;
1322     if ((vendor_id == s->vendor_id &&
1323         product_id == s->product_id) ||
1324         (bus_num == s->bus_num &&
1325         addr == s->addr)) {
1326         pstrcpy(s->product_name, PRODUCT_NAME_SZ, product_name);
1327         s->bus_num = bus_num;
1328         s->addr = addr;
1329         return 1;
1330     } else {
1331         return 0;
1332     }
1333 }
1334
1335 /* the syntax is :
1336    'bus.addr' (decimal numbers) or
1337    'vendor_id:product_id' (hexa numbers) */
1338 static int usb_host_find_device(int *pbus_num, int *paddr,
1339                                 char *product_name, int product_name_size,
1340                                 const char *devname)
1341 {
1342     const char *p;
1343     int ret;
1344     FindDeviceState fs;
1345
1346     p = strchr(devname, '.');
1347     if (p) {
1348         *pbus_num = strtoul(devname, NULL, 0);
1349         *paddr = strtoul(p + 1, NULL, 0);
1350         fs.bus_num = *pbus_num;
1351         fs.addr = *paddr;
1352         ret = usb_host_scan(&fs, usb_host_find_device_scan);
1353         if (ret)
1354             pstrcpy(product_name, product_name_size, fs.product_name);
1355         return 0;
1356     }
1357
1358     p = strchr(devname, ':');
1359     if (p) {
1360         fs.vendor_id = strtoul(devname, NULL, 16);
1361         fs.product_id = strtoul(p + 1, NULL, 16);
1362         ret = usb_host_scan(&fs, usb_host_find_device_scan);
1363         if (ret) {
1364             *pbus_num = fs.bus_num;
1365             *paddr = fs.addr;
1366             pstrcpy(product_name, product_name_size, fs.product_name);
1367             return 0;
1368         }
1369     }
1370     return -1;
1371 }
1372
1373 /**********************/
1374 /* USB host device info */
1375
1376 struct usb_class_info {
1377     int class;
1378     const char *class_name;
1379 };
1380
1381 static const struct usb_class_info usb_class_info[] = {
1382     { USB_CLASS_AUDIO, "Audio"},
1383     { USB_CLASS_COMM, "Communication"},
1384     { USB_CLASS_HID, "HID"},
1385     { USB_CLASS_HUB, "Hub" },
1386     { USB_CLASS_PHYSICAL, "Physical" },
1387     { USB_CLASS_PRINTER, "Printer" },
1388     { USB_CLASS_MASS_STORAGE, "Storage" },
1389     { USB_CLASS_CDC_DATA, "Data" },
1390     { USB_CLASS_APP_SPEC, "Application Specific" },
1391     { USB_CLASS_VENDOR_SPEC, "Vendor Specific" },
1392     { USB_CLASS_STILL_IMAGE, "Still Image" },
1393     { USB_CLASS_CSCID, "Smart Card" },
1394     { USB_CLASS_CONTENT_SEC, "Content Security" },
1395     { -1, NULL }
1396 };
1397
1398 static const char *usb_class_str(uint8_t class)
1399 {
1400     const struct usb_class_info *p;
1401     for(p = usb_class_info; p->class != -1; p++) {
1402         if (p->class == class)
1403             break;
1404     }
1405     return p->class_name;
1406 }
1407
1408 static void usb_info_device(int bus_num, int addr, int class_id,
1409                             int vendor_id, int product_id,
1410                             const char *product_name,
1411                             int speed)
1412 {
1413     const char *class_str, *speed_str;
1414
1415     switch(speed) {
1416     case USB_SPEED_LOW:
1417         speed_str = "1.5";
1418         break;
1419     case USB_SPEED_FULL:
1420         speed_str = "12";
1421         break;
1422     case USB_SPEED_HIGH:
1423         speed_str = "480";
1424         break;
1425     default:
1426         speed_str = "?";
1427         break;
1428     }
1429
1430     term_printf("  Device %d.%d, speed %s Mb/s\n",
1431                 bus_num, addr, speed_str);
1432     class_str = usb_class_str(class_id);
1433     if (class_str)
1434         term_printf("    %s:", class_str);
1435     else
1436         term_printf("    Class %02x:", class_id);
1437     term_printf(" USB device %04x:%04x", vendor_id, product_id);
1438     if (product_name[0] != '\0')
1439         term_printf(", %s", product_name);
1440     term_printf("\n");
1441 }
1442
1443 static int usb_host_info_device(void *opaque, int bus_num, int addr,
1444                                 int class_id,
1445                                 int vendor_id, int product_id,
1446                                 const char *product_name,
1447                                 int speed)
1448 {
1449     usb_info_device(bus_num, addr, class_id, vendor_id, product_id,
1450                     product_name, speed);
1451     return 0;
1452 }
1453
1454 static void dec2str(int val, char *str)
1455 {
1456     if (val == -1)
1457         strcpy(str, "*");
1458     else
1459         sprintf(str, "%d", val);
1460 }
1461
1462 static void hex2str(int val, char *str)
1463 {
1464     if (val == -1)
1465         strcpy(str, "*");
1466     else
1467         sprintf(str, "%x", val);
1468 }
1469
1470 void usb_host_info(void)
1471 {
1472     struct USBAutoFilter *f;
1473
1474     usb_host_scan(NULL, usb_host_info_device);
1475
1476     if (usb_auto_filter)
1477         term_printf("  Auto filters:\n");
1478     for (f = usb_auto_filter; f; f = f->next) {
1479         char bus[10], addr[10], vid[10], pid[10];
1480         dec2str(f->bus_num, bus);
1481         dec2str(f->addr, addr);
1482         hex2str(f->vendor_id, vid);
1483         hex2str(f->product_id, pid);
1484         term_printf("    Device %s.%s ID %s:%s\n", bus, addr, vid, pid);
1485     }
1486 }
1487
1488 #else
1489
1490 #include "hw/usb.h"
1491
1492 void usb_host_info(void)
1493 {
1494     term_printf("USB host devices not supported\n");
1495 }
1496
1497 /* XXX: modify configure to compile the right host driver */
1498 USBDevice *usb_host_device_open(const char *devname)
1499 {
1500     return NULL;
1501 }
1502
1503 int usb_host_device_close(const char *devname)
1504 {
1505     return 0;
1506 }
1507
1508 #endif