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  * Copyright 2008 TJ <linux@tjworld.net>
  11  *      Added flexible support for /dev/bus/usb /sys/bus/usb/devices in addition
  12  *      to the legacy /proc/bus/usb USB device discovery and handling
  13  *
  14  * Permission is hereby granted, free of charge, to any person obtaining a copy
  15  * of this software and associated documentation files (the "Software"), to deal
  16  * in the Software without restriction, including without limitation the rights
  17  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  18  * copies of the Software, and to permit persons to whom the Software is
  19  * furnished to do so, subject to the following conditions:
  20  *
  21  * The above copyright notice and this permission notice shall be included in
  22  * all copies or substantial portions of the Software.
  23  *
  24  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  25  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  26  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
  27  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  28  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  29  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  30  * THE SOFTWARE.
  31  */
  32
  33 #include "qemu-common.h"
  34 #include "qemu-timer.h"
  35 #include "monitor.h"
  36
  37 #include <dirent.h>
  38 #include <sys/ioctl.h>
  39 #include <signal.h>
  40
  41 #include <linux/usbdevice_fs.h>
  42 #include <linux/version.h>
  43 #include "hw/usb.h"
  44
  45 /* We redefine it to avoid version problems */
  46 struct usb_ctrltransfer {
  47     uint8_t  bRequestType;
  48     uint8_t  bRequest;
  49     uint16_t wValue;
  50     uint16_t wIndex;
  51     uint16_t wLength;
  52     uint32_t timeout;
  53     void *data;
  54 };
  55
  56 struct usb_ctrlrequest {
  57     uint8_t bRequestType;
  58     uint8_t bRequest;
  59     uint16_t wValue;
  60     uint16_t wIndex;
  61     uint16_t wLength;
  62 };
  63
  64 typedef int USBScanFunc(void *opaque, int bus_num, int addr, int class_id,
  65                         int vendor_id, int product_id,
  66                         const char *product_name, int speed);
  67 static int usb_host_find_device(int *pbus_num, int *paddr,
  68                                 char *product_name, int product_name_size,
  69                                 const char *devname);
  70 //#define DEBUG
  71
  72 #ifdef DEBUG
  73 #define dprintf printf
  74 #else
  75 #define dprintf(...)
  76 #endif
  77
  78 #define USBDBG_DEVOPENED "husb: opened %s/devices\n"
  79
  80 #define USBPROCBUS_PATH "/proc/bus/usb"
  81 #define PRODUCT_NAME_SZ 32
  82 #define MAX_ENDPOINTS 16
  83 #define USBDEVBUS_PATH "/dev/bus/usb"
  84 #define USBSYSBUS_PATH "/sys/bus/usb"
  85
  86 static char *usb_host_device_path;
  87
  88 #define USB_FS_NONE 0
  89 #define USB_FS_PROC 1
  90 #define USB_FS_DEV 2
  91 #define USB_FS_SYS 3
  92
  93 static int usb_fs_type;
  94
  95 /* endpoint association data */
  96 struct endp_data {
  97     uint8_t type;
  98     uint8_t halted;
  99 };
 100
 101 enum {
 102     CTRL_STATE_IDLE = 0,
 103     CTRL_STATE_SETUP,
 104     CTRL_STATE_DATA,
 105     CTRL_STATE_ACK
 106 };
 107
 108 /*
 109  * Control transfer state.
 110  * Note that 'buffer' _must_ follow 'req' field because
 111  * we need contigious buffer when we submit control URB.
 112  */
 113 struct ctrl_struct {
 114     uint16_t len;
 115     uint16_t offset;
 116     uint8_t  state;
 117     struct   usb_ctrlrequest req;
 118     uint8_t  buffer[2048];
 119 };
 120
 121 typedef struct USBHostDevice {
 122     USBDevice dev;
 123     int       fd;
 124
 125     uint8_t   descr[1024];
 126     int       descr_len;
 127     int       configuration;
 128     int       ninterfaces;
 129     int       closing;
 130
 131     struct ctrl_struct ctrl;
 132     struct endp_data endp_table[MAX_ENDPOINTS];
 133
 134     /* Host side address */
 135     int bus_num;
 136     int addr;
 137
 138     struct USBHostDevice *next;
 139 } USBHostDevice;
 140
 141 static int is_isoc(USBHostDevice *s, int ep)
 142 {
 143     return s->endp_table[ep - 1].type == USBDEVFS_URB_TYPE_ISO;
 144 }
 145
 146 static int is_halted(USBHostDevice *s, int ep)
 147 {
 148     return s->endp_table[ep - 1].halted;
 149 }
 150
 151 static void clear_halt(USBHostDevice *s, int ep)
 152 {
 153     s->endp_table[ep - 1].halted = 0;
 154 }
 155
 156 static void set_halt(USBHostDevice *s, int ep)
 157 {
 158     s->endp_table[ep - 1].halted = 1;
 159 }
 160
 161 static USBHostDevice *hostdev_list;
 162
 163 static void hostdev_link(USBHostDevice *dev)
 164 {
 165     dev->next = hostdev_list;
 166     hostdev_list = dev;
 167 }
 168
 169 static void hostdev_unlink(USBHostDevice *dev)
 170 {
 171     USBHostDevice *pdev = hostdev_list;
 172     USBHostDevice **prev = &hostdev_list;
 173
 174     while (pdev) {
 175         if (pdev == dev) {
 176             *prev = dev->next;
 177             return;
 178         }
 179
 180         prev = &pdev->next;
 181         pdev = pdev->next;
 182     }
 183 }
 184
 185 static USBHostDevice *hostdev_find(int bus_num, int addr)
 186 {
 187     USBHostDevice *s = hostdev_list;
 188     while (s) {
 189         if (s->bus_num == bus_num && s->addr == addr)
 190             return s;
 191         s = s->next;
 192     }
 193     return NULL;
 194 }
 195
 196 /*
 197  * Async URB state.
 198  * We always allocate one isoc descriptor even for bulk transfers
 199  * to simplify allocation and casts.
 200  */
 201 typedef struct AsyncURB
 202 {
 203     struct usbdevfs_urb urb;
 204     struct usbdevfs_iso_packet_desc isocpd;
 205
 206     USBPacket     *packet;
 207     USBHostDevice *hdev;
 208 } AsyncURB;
 209
 210 static AsyncURB *async_alloc(void)
 211 {
 212     return (AsyncURB *) qemu_mallocz(sizeof(AsyncURB));
 213 }
 214
 215 static void async_free(AsyncURB *aurb)
 216 {
 217     qemu_free(aurb);
 218 }
 219
 220 static void async_complete_ctrl(USBHostDevice *s, USBPacket *p)
 221 {
 222     switch(s->ctrl.state) {
 223     case CTRL_STATE_SETUP:
 224         if (p->len < s->ctrl.len)
 225             s->ctrl.len = p->len;
 226         s->ctrl.state = CTRL_STATE_DATA;
 227         p->len = 8;
 228         break;
 229
 230     case CTRL_STATE_ACK:
 231         s->ctrl.state = CTRL_STATE_IDLE;
 232         p->len = 0;
 233         break;
 234
 235     default:
 236         break;
 237     }
 238 }
 239
 240 static void async_complete(void *opaque)
 241 {
 242     USBHostDevice *s = opaque;
 243     AsyncURB *aurb;
 244
 245     while (1) {
 246         USBPacket *p;
 247
 248         int r = ioctl(s->fd, USBDEVFS_REAPURBNDELAY, &aurb);
 249         if (r < 0) {
 250             if (errno == EAGAIN)
 251                 return;
 252
 253             if (errno == ENODEV && !s->closing) {
 254                 printf("husb: device %d.%d disconnected\n", s->bus_num, s->addr);
 255                 usb_device_delete_addr(s->bus_num, s->dev.addr);
 256                 return;
 257             }
 258
 259             dprintf("husb: async. reap urb failed errno %d\n", errno);
 260             return;
 261         }
 262
 263         p = aurb->packet;
 264
 265         dprintf("husb: async completed. aurb %p status %d alen %d\n",
 266                 aurb, aurb->urb.status, aurb->urb.actual_length);
 267
 268         if (p) {
 269             switch (aurb->urb.status) {
 270             case 0:
 271                 p->len = aurb->urb.actual_length;
 272                 if (aurb->urb.type == USBDEVFS_URB_TYPE_CONTROL)
 273                     async_complete_ctrl(s, p);
 274                 break;
 275
 276             case -EPIPE:
 277                 set_halt(s, p->devep);
 278                 /* fall through */
 279             default:
 280                 p->len = USB_RET_NAK;
 281                 break;
 282             }
 283
 284             usb_packet_complete(p);
 285         }
 286
 287         async_free(aurb);
 288     }
 289 }
 290
 291 static void async_cancel(USBPacket *unused, void *opaque)
 292 {
 293     AsyncURB *aurb = opaque;
 294     USBHostDevice *s = aurb->hdev;
 295
 296     dprintf("husb: async cancel. aurb %p\n", aurb);
 297
 298     /* Mark it as dead (see async_complete above) */
 299     aurb->packet = NULL;
 300
 301     int r = ioctl(s->fd, USBDEVFS_DISCARDURB, aurb);
 302     if (r < 0) {
 303         dprintf("husb: async. discard urb failed errno %d\n", errno);
 304     }
 305 }
 306
 307 static int usb_host_claim_interfaces(USBHostDevice *dev, int configuration)
 308 {
 309     int dev_descr_len, config_descr_len;
 310     int interface, nb_interfaces, nb_configurations;
 311     int ret, i;
 312
 313     if (configuration == 0) /* address state - ignore */
 314         return 1;
 315
 316     dprintf("husb: claiming interfaces. config %d\n", configuration);
 317
 318     i = 0;
 319     dev_descr_len = dev->descr[0];
 320     if (dev_descr_len > dev->descr_len)
 321         goto fail;
 322     nb_configurations = dev->descr[17];
 323
 324     i += dev_descr_len;
 325     while (i < dev->descr_len) {
 326         dprintf("husb: i is %d, descr_len is %d, dl %d, dt %d\n", i, dev->descr_len,
 327                dev->descr[i], dev->descr[i+1]);
 328
 329         if (dev->descr[i+1] != USB_DT_CONFIG) {
 330             i += dev->descr[i];
 331             continue;
 332         }
 333         config_descr_len = dev->descr[i];
 334
 335         printf("husb: config #%d need %d\n", dev->descr[i + 5], configuration);
 336
 337         if (configuration < 0 || configuration == dev->descr[i + 5]) {
 338             configuration = dev->descr[i + 5];
 339             break;
 340         }
 341
 342         i += config_descr_len;
 343     }
 344
 345     if (i >= dev->descr_len) {
 346         fprintf(stderr, "husb: update iface failed. no matching configuration\n");
 347         goto fail;
 348     }
 349     nb_interfaces = dev->descr[i + 4];
 350
 351 #ifdef USBDEVFS_DISCONNECT
 352     /* earlier Linux 2.4 do not support that */
 353     {
 354         struct usbdevfs_ioctl ctrl;
 355         for (interface = 0; interface < nb_interfaces; interface++) {
 356             ctrl.ioctl_code = USBDEVFS_DISCONNECT;
 357             ctrl.ifno = interface;
 358             ret = ioctl(dev->fd, USBDEVFS_IOCTL, &ctrl);
 359             if (ret < 0 && errno != ENODATA) {
 360                 perror("USBDEVFS_DISCONNECT");
 361                 goto fail;
 362             }
 363         }
 364     }
 365 #endif
 366
 367     /* XXX: only grab if all interfaces are free */
 368     for (interface = 0; interface < nb_interfaces; interface++) {
 369         ret = ioctl(dev->fd, USBDEVFS_CLAIMINTERFACE, &interface);
 370         if (ret < 0) {
 371             if (errno == EBUSY) {
 372                 printf("husb: update iface. device already grabbed\n");
 373             } else {
 374                 perror("husb: failed to claim interface");
 375             }
 376         fail:
 377             return 0;
 378         }
 379     }
 380
 381     printf("husb: %d interfaces claimed for configuration %d\n",
 382            nb_interfaces, configuration);
 383
 384     dev->ninterfaces   = nb_interfaces;
 385     dev->configuration = configuration;
 386     return 1;
 387 }
 388
 389 static int usb_host_release_interfaces(USBHostDevice *s)
 390 {
 391     int ret, i;
 392
 393     dprintf("husb: releasing interfaces\n");
 394
 395     for (i = 0; i < s->ninterfaces; i++) {
 396         ret = ioctl(s->fd, USBDEVFS_RELEASEINTERFACE, &i);
 397         if (ret < 0) {
 398             perror("husb: failed to release interface");
 399             return 0;
 400         }
 401     }
 402
 403     return 1;
 404 }
 405
 406 static void usb_host_handle_reset(USBDevice *dev)
 407 {
 408     USBHostDevice *s = (USBHostDevice *) dev;
 409
 410     dprintf("husb: reset device %u.%u\n", s->bus_num, s->addr);
 411
 412     ioctl(s->fd, USBDEVFS_RESET);
 413
 414     usb_host_claim_interfaces(s, s->configuration);
 415 }
 416
 417 static void usb_host_handle_destroy(USBDevice *dev)
 418 {
 419     USBHostDevice *s = (USBHostDevice *)dev;
 420
 421     s->closing = 1;
 422
 423     qemu_set_fd_handler(s->fd, NULL, NULL, NULL);
 424
 425     hostdev_unlink(s);
 426
 427     async_complete(s);
 428
 429     if (s->fd >= 0)
 430         close(s->fd);
 431
 432     qemu_free(s);
 433 }
 434
 435 static int usb_linux_update_endp_table(USBHostDevice *s);
 436
 437 static int usb_host_handle_data(USBHostDevice *s, USBPacket *p)
 438 {
 439     struct usbdevfs_urb *urb;
 440     AsyncURB *aurb;
 441     int ret;
 442
 443     aurb = async_alloc();
 444     aurb->hdev   = s;
 445     aurb->packet = p;
 446
 447     urb = &aurb->urb;
 448
 449     if (p->pid == USB_TOKEN_IN)
 450         urb->endpoint = p->devep | 0x80;
 451     else
 452         urb->endpoint = p->devep;
 453
 454     if (is_halted(s, p->devep)) {
 455         ret = ioctl(s->fd, USBDEVFS_CLEAR_HALT, &urb->endpoint);
 456         if (ret < 0) {
 457             dprintf("husb: failed to clear halt. ep 0x%x errno %d\n",
 458                    urb->endpoint, errno);
 459             return USB_RET_NAK;
 460         }
 461         clear_halt(s, p->devep);
 462     }
 463
 464     urb->buffer        = p->data;
 465     urb->buffer_length = p->len;
 466
 467     if (is_isoc(s, p->devep)) {
 468         /* Setup ISOC transfer */
 469         urb->type     = USBDEVFS_URB_TYPE_ISO;
 470         urb->flags    = USBDEVFS_URB_ISO_ASAP;
 471         urb->number_of_packets = 1;
 472         urb->iso_frame_desc[0].length = p->len;
 473     } else {
 474         /* Setup bulk transfer */
 475         urb->type     = USBDEVFS_URB_TYPE_BULK;
 476     }
 477
 478     urb->usercontext = s;
 479
 480     ret = ioctl(s->fd, USBDEVFS_SUBMITURB, urb);
 481
 482     dprintf("husb: data submit. ep 0x%x len %u aurb %p\n", urb->endpoint, p->len, aurb);
 483
 484     if (ret < 0) {
 485         dprintf("husb: submit failed. errno %d\n", errno);
 486         async_free(aurb);
 487
 488         switch(errno) {
 489         case ETIMEDOUT:
 490             return USB_RET_NAK;
 491         case EPIPE:
 492         default:
 493             return USB_RET_STALL;
 494         }
 495     }
 496
 497     usb_defer_packet(p, async_cancel, aurb);
 498     return USB_RET_ASYNC;
 499 }
 500
 501 static int ctrl_error(void)
 502 {
 503     if (errno == ETIMEDOUT)
 504         return USB_RET_NAK;
 505     else
 506         return USB_RET_STALL;
 507 }
 508
 509 static int usb_host_set_address(USBHostDevice *s, int addr)
 510 {
 511     dprintf("husb: ctrl set addr %u\n", addr);
 512     s->dev.addr = addr;
 513     return 0;
 514 }
 515
 516 static int usb_host_set_config(USBHostDevice *s, int config)
 517 {
 518     usb_host_release_interfaces(s);
 519
 520     int ret = ioctl(s->fd, USBDEVFS_SETCONFIGURATION, &config);
 521
 522     dprintf("husb: ctrl set config %d ret %d errno %d\n", config, ret, errno);
 523
 524     if (ret < 0)
 525         return ctrl_error();
 526
 527     usb_host_claim_interfaces(s, config);
 528     return 0;
 529 }
 530
 531 static int usb_host_set_interface(USBHostDevice *s, int iface, int alt)
 532 {
 533     struct usbdevfs_setinterface si;
 534     int ret;
 535
 536     si.interface  = iface;
 537     si.altsetting = alt;
 538     ret = ioctl(s->fd, USBDEVFS_SETINTERFACE, &si);
 539
 540     dprintf("husb: ctrl set iface %d altset %d ret %d errno %d\n",
 541         iface, alt, ret, errno);
 542
 543     if (ret < 0)
 544         return ctrl_error();
 545
 546     usb_linux_update_endp_table(s);
 547     return 0;
 548 }
 549
 550 static int usb_host_handle_control(USBHostDevice *s, USBPacket *p)
 551 {
 552     struct usbdevfs_urb *urb;
 553     AsyncURB *aurb;
 554     int ret, value, index;
 555     int buffer_len;
 556
 557     /*
 558      * Process certain standard device requests.
 559      * These are infrequent and are processed synchronously.
 560      */
 561     value = le16_to_cpu(s->ctrl.req.wValue);
 562     index = le16_to_cpu(s->ctrl.req.wIndex);
 563
 564     dprintf("husb: ctrl type 0x%x req 0x%x val 0x%x index %u len %u\n",
 565         s->ctrl.req.bRequestType, s->ctrl.req.bRequest, value, index,
 566         s->ctrl.len);
 567
 568     if (s->ctrl.req.bRequestType == 0) {
 569         switch (s->ctrl.req.bRequest) {
 570         case USB_REQ_SET_ADDRESS:
 571             return usb_host_set_address(s, value);
 572
 573         case USB_REQ_SET_CONFIGURATION:
 574             return usb_host_set_config(s, value & 0xff);
 575         }
 576     }
 577
 578     if (s->ctrl.req.bRequestType == 1 &&
 579                   s->ctrl.req.bRequest == USB_REQ_SET_INTERFACE)
 580         return usb_host_set_interface(s, index, value);
 581
 582     /* The rest are asynchronous */
 583
 584     buffer_len = 8 + s->ctrl.len;
 585     if (buffer_len > sizeof(s->ctrl.buffer)) {
 586             fprintf(stderr, "husb: ctrl buffer too small (%u > %lu)\n",
 587                     buffer_len, sizeof(s->ctrl.buffer));
 588             return USB_RET_STALL;
 589     }
 590
 591     aurb = async_alloc();
 592     aurb->hdev   = s;
 593     aurb->packet = p;
 594
 595     /*
 596      * Setup ctrl transfer.
 597      *
 598      * s->ctrl is layed out such that data buffer immediately follows
 599      * 'req' struct which is exactly what usbdevfs expects.
 600      */
 601     urb = &aurb->urb;
 602
 603     urb->type     = USBDEVFS_URB_TYPE_CONTROL;
 604     urb->endpoint = p->devep;
 605
 606     urb->buffer        = &s->ctrl.req;
 607     urb->buffer_length = buffer_len;
 608
 609     urb->usercontext = s;
 610
 611     ret = ioctl(s->fd, USBDEVFS_SUBMITURB, urb);
 612
 613     dprintf("husb: submit ctrl. len %u aurb %p\n", urb->buffer_length, aurb);
 614
 615     if (ret < 0) {
 616         dprintf("husb: submit failed. errno %d\n", errno);
 617         async_free(aurb);
 618
 619         switch(errno) {
 620         case ETIMEDOUT:
 621             return USB_RET_NAK;
 622         case EPIPE:
 623         default:
 624             return USB_RET_STALL;
 625         }
 626     }
 627
 628     usb_defer_packet(p, async_cancel, aurb);
 629     return USB_RET_ASYNC;
 630 }
 631
 632 static int do_token_setup(USBDevice *dev, USBPacket *p)
 633 {
 634     USBHostDevice *s = (USBHostDevice *) dev;
 635     int ret = 0;
 636
 637     if (p->len != 8)
 638         return USB_RET_STALL;
 639
 640     memcpy(&s->ctrl.req, p->data, 8);
 641     s->ctrl.len    = le16_to_cpu(s->ctrl.req.wLength);
 642     s->ctrl.offset = 0;
 643     s->ctrl.state  = CTRL_STATE_SETUP;
 644
 645     if (s->ctrl.req.bRequestType & USB_DIR_IN) {
 646         ret = usb_host_handle_control(s, p);
 647         if (ret < 0)
 648             return ret;
 649
 650         if (ret < s->ctrl.len)
 651             s->ctrl.len = ret;
 652         s->ctrl.state = CTRL_STATE_DATA;
 653     } else {
 654         if (s->ctrl.len == 0)
 655             s->ctrl.state = CTRL_STATE_ACK;
 656         else
 657             s->ctrl.state = CTRL_STATE_DATA;
 658     }
 659
 660     return ret;
 661 }
 662
 663 static int do_token_in(USBDevice *dev, USBPacket *p)
 664 {
 665     USBHostDevice *s = (USBHostDevice *) dev;
 666     int ret = 0;
 667
 668     if (p->devep != 0)
 669         return usb_host_handle_data(s, p);
 670
 671     switch(s->ctrl.state) {
 672     case CTRL_STATE_ACK:
 673         if (!(s->ctrl.req.bRequestType & USB_DIR_IN)) {
 674             ret = usb_host_handle_control(s, p);
 675             if (ret == USB_RET_ASYNC)
 676                 return USB_RET_ASYNC;
 677
 678             s->ctrl.state = CTRL_STATE_IDLE;
 679             return ret > 0 ? 0 : ret;
 680         }
 681
 682         return 0;
 683
 684     case CTRL_STATE_DATA:
 685         if (s->ctrl.req.bRequestType & USB_DIR_IN) {
 686             int len = s->ctrl.len - s->ctrl.offset;
 687             if (len > p->len)
 688                 len = p->len;
 689             memcpy(p->data, s->ctrl.buffer + s->ctrl.offset, len);
 690             s->ctrl.offset += len;
 691             if (s->ctrl.offset >= s->ctrl.len)
 692                 s->ctrl.state = CTRL_STATE_ACK;
 693             return len;
 694         }
 695
 696         s->ctrl.state = CTRL_STATE_IDLE;
 697         return USB_RET_STALL;
 698
 699     default:
 700         return USB_RET_STALL;
 701     }
 702 }
 703
 704 static int do_token_out(USBDevice *dev, USBPacket *p)
 705 {
 706     USBHostDevice *s = (USBHostDevice *) dev;
 707
 708     if (p->devep != 0)
 709         return usb_host_handle_data(s, p);
 710
 711     switch(s->ctrl.state) {
 712     case CTRL_STATE_ACK:
 713         if (s->ctrl.req.bRequestType & USB_DIR_IN) {
 714             s->ctrl.state = CTRL_STATE_IDLE;
 715             /* transfer OK */
 716         } else {
 717             /* ignore additional output */
 718         }
 719         return 0;
 720
 721     case CTRL_STATE_DATA:
 722         if (!(s->ctrl.req.bRequestType & USB_DIR_IN)) {
 723             int len = s->ctrl.len - s->ctrl.offset;
 724             if (len > p->len)
 725                 len = p->len;
 726             memcpy(s->ctrl.buffer + s->ctrl.offset, p->data, len);
 727             s->ctrl.offset += len;
 728             if (s->ctrl.offset >= s->ctrl.len)
 729                 s->ctrl.state = CTRL_STATE_ACK;
 730             return len;
 731         }
 732
 733         s->ctrl.state = CTRL_STATE_IDLE;
 734         return USB_RET_STALL;
 735
 736     default:
 737         return USB_RET_STALL;
 738     }
 739 }
 740
 741 /*
 742  * Packet handler.
 743  * Called by the HC (host controller).
 744  *
 745  * Returns length of the transaction or one of the USB_RET_XXX codes.
 746  */
 747 static int usb_host_handle_packet(USBDevice *s, USBPacket *p)
 748 {
 749     switch(p->pid) {
 750     case USB_MSG_ATTACH:
 751         s->state = USB_STATE_ATTACHED;
 752         return 0;
 753
 754     case USB_MSG_DETACH:
 755         s->state = USB_STATE_NOTATTACHED;
 756         return 0;
 757
 758     case USB_MSG_RESET:
 759         s->remote_wakeup = 0;
 760         s->addr = 0;
 761         s->state = USB_STATE_DEFAULT;
 762         s->info->handle_reset(s);
 763         return 0;
 764     }
 765
 766     /* Rest of the PIDs must match our address */
 767     if (s->state < USB_STATE_DEFAULT || p->devaddr != s->addr)
 768         return USB_RET_NODEV;
 769
 770     switch (p->pid) {
 771     case USB_TOKEN_SETUP:
 772         return do_token_setup(s, p);
 773
 774     case USB_TOKEN_IN:
 775         return do_token_in(s, p);
 776
 777     case USB_TOKEN_OUT:
 778         return do_token_out(s, p);
 779
 780     default:
 781         return USB_RET_STALL;
 782     }
 783 }
 784
 785 /* returns 1 on problem encountered or 0 for success */
 786 static int usb_linux_update_endp_table(USBHostDevice *s)
 787 {
 788     uint8_t *descriptors;
 789     uint8_t devep, type, configuration, alt_interface;
 790     struct usb_ctrltransfer ct;
 791     int interface, ret, length, i;
 792
 793     ct.bRequestType = USB_DIR_IN;
 794     ct.bRequest = USB_REQ_GET_CONFIGURATION;
 795     ct.wValue = 0;
 796     ct.wIndex = 0;
 797     ct.wLength = 1;
 798     ct.data = &configuration;
 799     ct.timeout = 50;
 800
 801     ret = ioctl(s->fd, USBDEVFS_CONTROL, &ct);
 802     if (ret < 0) {
 803         perror("usb_linux_update_endp_table");
 804         return 1;
 805     }
 806
 807     /* in address state */
 808     if (configuration == 0)
 809         return 1;
 810
 811     /* get the desired configuration, interface, and endpoint descriptors
 812      * from device description */
 813     descriptors = &s->descr[18];
 814     length = s->descr_len - 18;
 815     i = 0;
 816
 817     if (descriptors[i + 1] != USB_DT_CONFIG ||
 818         descriptors[i + 5] != configuration) {
 819         dprintf("invalid descriptor data - configuration\n");
 820         return 1;
 821     }
 822     i += descriptors[i];
 823
 824     while (i < length) {
 825         if (descriptors[i + 1] != USB_DT_INTERFACE ||
 826             (descriptors[i + 1] == USB_DT_INTERFACE &&
 827              descriptors[i + 4] == 0)) {
 828             i += descriptors[i];
 829             continue;
 830         }
 831
 832         interface = descriptors[i + 2];
 833
 834         ct.bRequestType = USB_DIR_IN | USB_RECIP_INTERFACE;
 835         ct.bRequest = USB_REQ_GET_INTERFACE;
 836         ct.wValue = 0;
 837         ct.wIndex = interface;
 838         ct.wLength = 1;
 839         ct.data = &alt_interface;
 840         ct.timeout = 50;
 841
 842         ret = ioctl(s->fd, USBDEVFS_CONTROL, &ct);
 843         if (ret < 0) {
 844             alt_interface = interface;
 845         }
 846
 847         /* the current interface descriptor is the active interface
 848          * and has endpoints */
 849         if (descriptors[i + 3] != alt_interface) {
 850             i += descriptors[i];
 851             continue;
 852         }
 853
 854         /* advance to the endpoints */
 855         while (i < length && descriptors[i +1] != USB_DT_ENDPOINT)
 856             i += descriptors[i];
 857
 858         if (i >= length)
 859             break;
 860
 861         while (i < length) {
 862             if (descriptors[i + 1] != USB_DT_ENDPOINT)
 863                 break;
 864
 865             devep = descriptors[i + 2];
 866             switch (descriptors[i + 3] & 0x3) {
 867             case 0x00:
 868                 type = USBDEVFS_URB_TYPE_CONTROL;
 869                 break;
 870             case 0x01:
 871                 type = USBDEVFS_URB_TYPE_ISO;
 872                 break;
 873             case 0x02:
 874                 type = USBDEVFS_URB_TYPE_BULK;
 875                 break;
 876             case 0x03:
 877                 type = USBDEVFS_URB_TYPE_INTERRUPT;
 878                 break;
 879             default:
 880                 dprintf("usb_host: malformed endpoint type\n");
 881                 type = USBDEVFS_URB_TYPE_BULK;
 882             }
 883             s->endp_table[(devep & 0xf) - 1].type = type;
 884             s->endp_table[(devep & 0xf) - 1].halted = 0;
 885
 886             i += descriptors[i];
 887         }
 888     }
 889     return 0;
 890 }
 891
 892 static int usb_host_initfn(USBDevice *dev)
 893 {
 894     return 0;
 895 }
 896
 897 static USBDevice *usb_host_device_open_addr(int bus_num, int addr, const char *prod_name)
 898 {
 899     int fd = -1, ret;
 900     USBDevice *d = NULL;
 901     USBHostDevice *dev;
 902     struct usbdevfs_connectinfo ci;
 903     char buf[1024];
 904
 905     printf("husb: open device %d.%d\n", bus_num, addr);
 906
 907     if (!usb_host_device_path) {
 908         perror("husb: USB Host Device Path not set");
 909         goto fail;
 910     }
 911     snprintf(buf, sizeof(buf), "%s/%03d/%03d", usb_host_device_path,
 912              bus_num, addr);
 913     fd = open(buf, O_RDWR | O_NONBLOCK);
 914     if (fd < 0) {
 915         perror(buf);
 916         goto fail;
 917     }
 918     dprintf("husb: opened %s\n", buf);
 919
 920     d = usb_create(NULL /* FIXME */, "USB Host Device");
 921     dev = DO_UPCAST(USBHostDevice, dev, d);
 922
 923     dev->bus_num = bus_num;
 924     dev->addr = addr;
 925
 926     /* read the device description */
 927     dev->descr_len = read(fd, dev->descr, sizeof(dev->descr));
 928     if (dev->descr_len <= 0) {
 929         perror("husb: reading device data failed");
 930         goto fail;
 931     }
 932
 933 #ifdef DEBUG
 934     {
 935         int x;
 936         printf("=== begin dumping device descriptor data ===\n");
 937         for (x = 0; x < dev->descr_len; x++)
 938             printf("%02x ", dev->descr[x]);
 939         printf("\n=== end dumping device descriptor data ===\n");
 940     }
 941 #endif
 942
 943
 944     /*
 945      * Initial configuration is -1 which makes us claim first
 946      * available config. We used to start with 1, which does not
 947      * always work. I've seen devices where first config starts
 948      * with 2.
 949      */
 950     if (!usb_host_claim_interfaces(dev, -1))
 951         goto fail;
 952
 953     ret = ioctl(fd, USBDEVFS_CONNECTINFO, &ci);
 954     if (ret < 0) {
 955         perror("usb_host_device_open: USBDEVFS_CONNECTINFO");
 956         goto fail;
 957     }
 958
 959     printf("husb: grabbed usb device %d.%d\n", bus_num, addr);
 960
 961     ret = usb_linux_update_endp_table(dev);
 962     if (ret)
 963         goto fail;
 964
 965     if (ci.slow)
 966         dev->dev.speed = USB_SPEED_LOW;
 967     else
 968         dev->dev.speed = USB_SPEED_HIGH;
 969
 970     if (!prod_name || prod_name[0] == '\0')
 971         snprintf(dev->dev.devname, sizeof(dev->dev.devname),
 972                  "host:%d.%d", bus_num, addr);
 973     else
 974         pstrcpy(dev->dev.devname, sizeof(dev->dev.devname),
 975                 prod_name);
 976
 977     /* USB devio uses 'write' flag to check for async completions */
 978     qemu_set_fd_handler(dev->fd, NULL, async_complete, dev);
 979
 980     hostdev_link(dev);
 981
 982     return (USBDevice *) dev;
 983
 984 fail:
 985     if (d)
 986         qdev_free(&d->qdev);
 987     if (fd != -1)
 988         close(fd);
 989     return NULL;
 990 }
 991
 992 static struct USBDeviceInfo usb_host_dev_info = {
 993     .qdev.name      = "USB Host Device",
 994     .qdev.size      = sizeof(USBHostDevice),
 995     .init           = usb_host_initfn,
 996     .handle_packet  = usb_host_handle_packet,
 997     .handle_reset   = usb_host_handle_reset,
 998 #if 0
 999     .handle_control = usb_host_handle_control,
1000     .handle_data    = usb_host_handle_data,
1001 #endif
1002     .handle_destroy = usb_host_handle_destroy,
1003 };
1004
1005 static void usb_host_register_devices(void)
1006 {
1007     usb_qdev_register(&usb_host_dev_info);
1008 }
1009 device_init(usb_host_register_devices)
1010
1011 static int usb_host_auto_add(const char *spec);
1012 static int usb_host_auto_del(const char *spec);
1013
1014 USBDevice *usb_host_device_open(const char *devname)
1015 {
1016     Monitor *mon = cur_mon;
1017     int bus_num, addr;
1018     char product_name[PRODUCT_NAME_SZ];
1019
1020     if (strstr(devname, "auto:")) {
1021         usb_host_auto_add(devname);
1022         return NULL;
1023     }
1024
1025     if (usb_host_find_device(&bus_num, &addr, product_name, sizeof(product_name),
1026                              devname) < 0)
1027         return NULL;
1028
1029     if (hostdev_find(bus_num, addr)) {
1030        monitor_printf(mon, "husb: host usb device %d.%d is already open\n",
1031                       bus_num, addr);
1032        return NULL;
1033     }
1034
1035     return usb_host_device_open_addr(bus_num, addr, product_name);
1036 }
1037
1038 int usb_host_device_close(const char *devname)
1039 {
1040     char product_name[PRODUCT_NAME_SZ];
1041     int bus_num, addr;
1042     USBHostDevice *s;
1043
1044     if (strstr(devname, "auto:"))
1045         return usb_host_auto_del(devname);
1046
1047     if (usb_host_find_device(&bus_num, &addr, product_name, sizeof(product_name),
1048                              devname) < 0)
1049         return -1;
1050
1051     s = hostdev_find(bus_num, addr);
1052     if (s) {
1053         usb_device_delete_addr(s->bus_num, s->dev.addr);
1054         return 0;
1055     }
1056
1057     return -1;
1058 }
1059
1060 static int get_tag_value(char *buf, int buf_size,
1061                          const char *str, const char *tag,
1062                          const char *stopchars)
1063 {
1064     const char *p;
1065     char *q;
1066     p = strstr(str, tag);
1067     if (!p)
1068         return -1;
1069     p += strlen(tag);
1070     while (qemu_isspace(*p))
1071         p++;
1072     q = buf;
1073     while (*p != '\0' && !strchr(stopchars, *p)) {
1074         if ((q - buf) < (buf_size - 1))
1075             *q++ = *p;
1076         p++;
1077     }
1078     *q = '\0';
1079     return q - buf;
1080 }
1081
1082 /*
1083  * Use /proc/bus/usb/devices or /dev/bus/usb/devices file to determine
1084  * host's USB devices. This is legacy support since many distributions
1085  * are moving to /sys/bus/usb
1086  */
1087 static int usb_host_scan_dev(void *opaque, USBScanFunc *func)
1088 {
1089     FILE *f = NULL;
1090     char line[1024];
1091     char buf[1024];
1092     int bus_num, addr, speed, device_count, class_id, product_id, vendor_id;
1093     char product_name[512];
1094     int ret = 0;
1095
1096     if (!usb_host_device_path) {
1097         perror("husb: USB Host Device Path not set");
1098         goto the_end;
1099     }
1100     snprintf(line, sizeof(line), "%s/devices", usb_host_device_path);
1101     f = fopen(line, "r");
1102     if (!f) {
1103         perror("husb: cannot open devices file");
1104         goto the_end;
1105     }
1106
1107     device_count = 0;
1108     bus_num = addr = speed = class_id = product_id = vendor_id = 0;
1109     for(;;) {
1110         if (fgets(line, sizeof(line), f) == NULL)
1111             break;
1112         if (strlen(line) > 0)
1113             line[strlen(line) - 1] = '\0';
1114         if (line[0] == 'T' && line[1] == ':') {
1115             if (device_count && (vendor_id || product_id)) {
1116                 /* New device.  Add the previously discovered device.  */
1117                 ret = func(opaque, bus_num, addr, class_id, vendor_id,
1118                            product_id, product_name, speed);
1119                 if (ret)
1120                     goto the_end;
1121             }
1122             if (get_tag_value(buf, sizeof(buf), line, "Bus=", " ") < 0)
1123                 goto fail;
1124             bus_num = atoi(buf);
1125             if (get_tag_value(buf, sizeof(buf), line, "Dev#=", " ") < 0)
1126                 goto fail;
1127             addr = atoi(buf);
1128             if (get_tag_value(buf, sizeof(buf), line, "Spd=", " ") < 0)
1129                 goto fail;
1130             if (!strcmp(buf, "480"))
1131                 speed = USB_SPEED_HIGH;
1132             else if (!strcmp(buf, "1.5"))
1133                 speed = USB_SPEED_LOW;
1134             else
1135                 speed = USB_SPEED_FULL;
1136             product_name[0] = '\0';
1137             class_id = 0xff;
1138             device_count++;
1139             product_id = 0;
1140             vendor_id = 0;
1141         } else if (line[0] == 'P' && line[1] == ':') {
1142             if (get_tag_value(buf, sizeof(buf), line, "Vendor=", " ") < 0)
1143                 goto fail;
1144             vendor_id = strtoul(buf, NULL, 16);
1145             if (get_tag_value(buf, sizeof(buf), line, "ProdID=", " ") < 0)
1146                 goto fail;
1147             product_id = strtoul(buf, NULL, 16);
1148         } else if (line[0] == 'S' && line[1] == ':') {
1149             if (get_tag_value(buf, sizeof(buf), line, "Product=", "") < 0)
1150                 goto fail;
1151             pstrcpy(product_name, sizeof(product_name), buf);
1152         } else if (line[0] == 'D' && line[1] == ':') {
1153             if (get_tag_value(buf, sizeof(buf), line, "Cls=", " (") < 0)
1154                 goto fail;
1155             class_id = strtoul(buf, NULL, 16);
1156         }
1157     fail: ;
1158     }
1159     if (device_count && (vendor_id || product_id)) {
1160         /* Add the last device.  */
1161         ret = func(opaque, bus_num, addr, class_id, vendor_id,
1162                    product_id, product_name, speed);
1163     }
1164  the_end:
1165     if (f)
1166         fclose(f);
1167     return ret;
1168 }
1169
1170 /*
1171  * Read sys file-system device file
1172  *
1173  * @line address of buffer to put file contents in
1174  * @line_size size of line
1175  * @device_file path to device file (printf format string)
1176  * @device_name device being opened (inserted into device_file)
1177  *
1178  * @return 0 failed, 1 succeeded ('line' contains data)
1179  */
1180 static int usb_host_read_file(char *line, size_t line_size, const char *device_file, const char *device_name)
1181 {
1182     Monitor *mon = cur_mon;
1183     FILE *f;
1184     int ret = 0;
1185     char filename[PATH_MAX];
1186
1187     snprintf(filename, PATH_MAX, USBSYSBUS_PATH "/devices/%s/%s", device_name,
1188              device_file);
1189     f = fopen(filename, "r");
1190     if (f) {
1191         fgets(line, line_size, f);
1192         fclose(f);
1193         ret = 1;
1194     } else {
1195         monitor_printf(mon, "husb: could not open %s\n", filename);
1196     }
1197
1198     return ret;
1199 }
1200
1201 /*
1202  * Use /sys/bus/usb/devices/ directory to determine host's USB
1203  * devices.
1204  *
1205  * This code is based on Robert Schiele's original patches posted to
1206  * the Novell bug-tracker https://bugzilla.novell.com/show_bug.cgi?id=241950
1207  */
1208 static int usb_host_scan_sys(void *opaque, USBScanFunc *func)
1209 {
1210     DIR *dir = NULL;
1211     char line[1024];
1212     int bus_num, addr, speed, class_id, product_id, vendor_id;
1213     int ret = 0;
1214     char product_name[512];
1215     struct dirent *de;
1216
1217     dir = opendir(USBSYSBUS_PATH "/devices");
1218     if (!dir) {
1219         perror("husb: cannot open devices directory");
1220         goto the_end;
1221     }
1222
1223     while ((de = readdir(dir))) {
1224         if (de->d_name[0] != '.' && !strchr(de->d_name, ':')) {
1225             char *tmpstr = de->d_name;
1226             if (!strncmp(de->d_name, "usb", 3))
1227                 tmpstr += 3;
1228             bus_num = atoi(tmpstr);
1229
1230             if (!usb_host_read_file(line, sizeof(line), "devnum", de->d_name))
1231                 goto the_end;
1232             if (sscanf(line, "%d", &addr) != 1)
1233                 goto the_end;
1234
1235             if (!usb_host_read_file(line, sizeof(line), "bDeviceClass",
1236                                     de->d_name))
1237                 goto the_end;
1238             if (sscanf(line, "%x", &class_id) != 1)
1239                 goto the_end;
1240
1241             if (!usb_host_read_file(line, sizeof(line), "idVendor", de->d_name))
1242                 goto the_end;
1243             if (sscanf(line, "%x", &vendor_id) != 1)
1244                 goto the_end;
1245
1246             if (!usb_host_read_file(line, sizeof(line), "idProduct",
1247                                     de->d_name))
1248                 goto the_end;
1249             if (sscanf(line, "%x", &product_id) != 1)
1250                 goto the_end;
1251
1252             if (!usb_host_read_file(line, sizeof(line), "product",
1253                                     de->d_name)) {
1254                 *product_name = 0;
1255             } else {
1256                 if (strlen(line) > 0)
1257                     line[strlen(line) - 1] = '\0';
1258                 pstrcpy(product_name, sizeof(product_name), line);
1259             }
1260
1261             if (!usb_host_read_file(line, sizeof(line), "speed", de->d_name))
1262                 goto the_end;
1263             if (!strcmp(line, "480\n"))
1264                 speed = USB_SPEED_HIGH;
1265             else if (!strcmp(line, "1.5\n"))
1266                 speed = USB_SPEED_LOW;
1267             else
1268                 speed = USB_SPEED_FULL;
1269
1270             ret = func(opaque, bus_num, addr, class_id, vendor_id,
1271                        product_id, product_name, speed);
1272             if (ret)
1273                 goto the_end;
1274         }
1275     }
1276  the_end:
1277     if (dir)
1278         closedir(dir);
1279     return ret;
1280 }
1281
1282 /*
1283  * Determine how to access the host's USB devices and call the
1284  * specific support function.
1285  */
1286 static int usb_host_scan(void *opaque, USBScanFunc *func)
1287 {
1288     Monitor *mon = cur_mon;
1289     FILE *f = NULL;
1290     DIR *dir = NULL;
1291     int ret = 0;
1292     const char *fs_type[] = {"unknown", "proc", "dev", "sys"};
1293     char devpath[PATH_MAX];
1294
1295     /* only check the host once */
1296     if (!usb_fs_type) {
1297         dir = opendir(USBSYSBUS_PATH "/devices");
1298         if (dir) {
1299             /* devices found in /dev/bus/usb/ (yes - not a mistake!) */
1300             strcpy(devpath, USBDEVBUS_PATH);
1301             usb_fs_type = USB_FS_SYS;
1302             closedir(dir);
1303             dprintf(USBDBG_DEVOPENED, USBSYSBUS_PATH);
1304             goto found_devices;
1305         }
1306         f = fopen(USBPROCBUS_PATH "/devices", "r");
1307         if (f) {
1308             /* devices found in /proc/bus/usb/ */
1309             strcpy(devpath, USBPROCBUS_PATH);
1310             usb_fs_type = USB_FS_PROC;
1311             fclose(f);
1312             dprintf(USBDBG_DEVOPENED, USBPROCBUS_PATH);
1313             goto found_devices;
1314         }
1315         /* try additional methods if an access method hasn't been found yet */
1316         f = fopen(USBDEVBUS_PATH "/devices", "r");
1317         if (f) {
1318             /* devices found in /dev/bus/usb/ */
1319             strcpy(devpath, USBDEVBUS_PATH);
1320             usb_fs_type = USB_FS_DEV;
1321             fclose(f);
1322             dprintf(USBDBG_DEVOPENED, USBDEVBUS_PATH);
1323             goto found_devices;
1324         }
1325     found_devices:
1326         if (!usb_fs_type) {
1327             monitor_printf(mon, "husb: unable to access USB devices\n");
1328             return -ENOENT;
1329         }
1330
1331         /* the module setting (used later for opening devices) */
1332         usb_host_device_path = qemu_mallocz(strlen(devpath)+1);
1333         strcpy(usb_host_device_path, devpath);
1334         monitor_printf(mon, "husb: using %s file-system with %s\n",
1335                        fs_type[usb_fs_type], usb_host_device_path);
1336     }
1337
1338     switch (usb_fs_type) {
1339     case USB_FS_PROC:
1340     case USB_FS_DEV:
1341         ret = usb_host_scan_dev(opaque, func);
1342         break;
1343     case USB_FS_SYS:
1344         ret = usb_host_scan_sys(opaque, func);
1345         break;
1346     default:
1347         ret = -EINVAL;
1348         break;
1349     }
1350     return ret;
1351 }
1352
1353 struct USBAutoFilter {
1354     struct USBAutoFilter *next;
1355     int bus_num;
1356     int addr;
1357     int vendor_id;
1358     int product_id;
1359 };
1360
1361 static QEMUTimer *usb_auto_timer;
1362 static struct USBAutoFilter *usb_auto_filter;
1363
1364 static int usb_host_auto_scan(void *opaque, int bus_num, int addr,
1365                      int class_id, int vendor_id, int product_id,
1366                      const char *product_name, int speed)
1367 {
1368     struct USBAutoFilter *f;
1369     struct USBDevice *dev;
1370
1371     /* Ignore hubs */
1372     if (class_id == 9)
1373         return 0;
1374
1375     for (f = usb_auto_filter; f; f = f->next) {
1376         if (f->bus_num >= 0 && f->bus_num != bus_num)
1377             continue;
1378
1379         if (f->addr >= 0 && f->addr != addr)
1380             continue;
1381
1382         if (f->vendor_id >= 0 && f->vendor_id != vendor_id)
1383             continue;
1384
1385         if (f->product_id >= 0 && f->product_id != product_id)
1386             continue;
1387
1388         /* We got a match */
1389
1390         /* Allredy attached ? */
1391         if (hostdev_find(bus_num, addr))
1392             return 0;
1393
1394         dprintf("husb: auto open: bus_num %d addr %d\n", bus_num, addr);
1395
1396         dev = usb_host_device_open_addr(bus_num, addr, product_name);
1397         if (dev)
1398             qdev_init(&dev->qdev);
1399     }
1400
1401     return 0;
1402 }
1403
1404 static void usb_host_auto_timer(void *unused)
1405 {
1406     usb_host_scan(NULL, usb_host_auto_scan);
1407     qemu_mod_timer(usb_auto_timer, qemu_get_clock(rt_clock) + 2000);
1408 }
1409
1410 /*
1411  * Autoconnect filter
1412  * Format:
1413  *    auto:bus:dev[:vid:pid]
1414  *    auto:bus.dev[:vid:pid]
1415  *
1416  *    bus  - bus number    (dec, * means any)
1417  *    dev  - device number (dec, * means any)
1418  *    vid  - vendor id     (hex, * means any)
1419  *    pid  - product id    (hex, * means any)
1420  *
1421  *    See 'lsusb' output.
1422  */
1423 static int parse_filter(const char *spec, struct USBAutoFilter *f)
1424 {
1425     enum { BUS, DEV, VID, PID, DONE };
1426     const char *p = spec;
1427     int i;
1428
1429     f->bus_num    = -1;
1430     f->addr       = -1;
1431     f->vendor_id  = -1;
1432     f->product_id = -1;
1433
1434     for (i = BUS; i < DONE; i++) {
1435         p = strpbrk(p, ":.");
1436         if (!p) break;
1437         p++;
1438
1439         if (*p == '*')
1440             continue;
1441
1442         switch(i) {
1443         case BUS: f->bus_num = strtol(p, NULL, 10);    break;
1444         case DEV: f->addr    = strtol(p, NULL, 10);    break;
1445         case VID: f->vendor_id  = strtol(p, NULL, 16); break;
1446         case PID: f->product_id = strtol(p, NULL, 16); break;
1447         }
1448     }
1449
1450     if (i < DEV) {
1451         fprintf(stderr, "husb: invalid auto filter spec %s\n", spec);
1452         return -1;
1453     }
1454
1455     return 0;
1456 }
1457
1458 static int match_filter(const struct USBAutoFilter *f1,
1459                         const struct USBAutoFilter *f2)
1460 {
1461     return f1->bus_num    == f2->bus_num &&
1462            f1->addr       == f2->addr &&
1463            f1->vendor_id  == f2->vendor_id &&
1464            f1->product_id == f2->product_id;
1465 }
1466
1467 static int usb_host_auto_add(const char *spec)
1468 {
1469     struct USBAutoFilter filter, *f;
1470
1471     if (parse_filter(spec, &filter) < 0)
1472         return -1;
1473
1474     f = qemu_mallocz(sizeof(*f));
1475
1476     *f = filter;
1477
1478     if (!usb_auto_filter) {
1479         /*
1480          * First entry. Init and start the monitor.
1481          * Right now we're using timer to check for new devices.
1482          * If this turns out to be too expensive we can move that into a
1483          * separate thread.
1484          */
1485         usb_auto_timer = qemu_new_timer(rt_clock, usb_host_auto_timer, NULL);
1486         if (!usb_auto_timer) {
1487             fprintf(stderr, "husb: failed to allocate auto scan timer\n");
1488             qemu_free(f);
1489             return -1;
1490         }
1491
1492         /* Check for new devices every two seconds */
1493         qemu_mod_timer(usb_auto_timer, qemu_get_clock(rt_clock) + 2000);
1494     }
1495
1496     dprintf("husb: added auto filter: bus_num %d addr %d vid %d pid %d\n",
1497         f->bus_num, f->addr, f->vendor_id, f->product_id);
1498
1499     f->next = usb_auto_filter;
1500     usb_auto_filter = f;
1501
1502     return 0;
1503 }
1504
1505 static int usb_host_auto_del(const char *spec)
1506 {
1507     struct USBAutoFilter *pf = usb_auto_filter;
1508     struct USBAutoFilter **prev = &usb_auto_filter;
1509     struct USBAutoFilter filter;
1510
1511     if (parse_filter(spec, &filter) < 0)
1512         return -1;
1513
1514     while (pf) {
1515         if (match_filter(pf, &filter)) {
1516             dprintf("husb: removed auto filter: bus_num %d addr %d vid %d pid %d\n",
1517                      pf->bus_num, pf->addr, pf->vendor_id, pf->product_id);
1518
1519             *prev = pf->next;
1520
1521             if (!usb_auto_filter) {
1522                 /* No more filters. Stop scanning. */
1523                 qemu_del_timer(usb_auto_timer);
1524                 qemu_free_timer(usb_auto_timer);
1525             }
1526
1527             return 0;
1528         }
1529
1530         prev = &pf->next;
1531         pf   = pf->next;
1532     }
1533
1534     return -1;
1535 }
1536
1537 typedef struct FindDeviceState {
1538     int vendor_id;
1539     int product_id;
1540     int bus_num;
1541     int addr;
1542     char product_name[PRODUCT_NAME_SZ];
1543 } FindDeviceState;
1544
1545 static int usb_host_find_device_scan(void *opaque, int bus_num, int addr,
1546                                      int class_id,
1547                                      int vendor_id, int product_id,
1548                                      const char *product_name, int speed)
1549 {
1550     FindDeviceState *s = opaque;
1551     if ((vendor_id == s->vendor_id &&
1552         product_id == s->product_id) ||
1553         (bus_num == s->bus_num &&
1554         addr == s->addr)) {
1555         pstrcpy(s->product_name, PRODUCT_NAME_SZ, product_name);
1556         s->bus_num = bus_num;
1557         s->addr = addr;
1558         return 1;
1559     } else {
1560         return 0;
1561     }
1562 }
1563
1564 /* the syntax is :
1565    'bus.addr' (decimal numbers) or
1566    'vendor_id:product_id' (hexa numbers) */
1567 static int usb_host_find_device(int *pbus_num, int *paddr,
1568                                 char *product_name, int product_name_size,
1569                                 const char *devname)
1570 {
1571     const char *p;
1572     int ret;
1573     FindDeviceState fs;
1574
1575     p = strchr(devname, '.');
1576     if (p) {
1577         *pbus_num = strtoul(devname, NULL, 0);
1578         *paddr = strtoul(p + 1, NULL, 0);
1579         fs.bus_num = *pbus_num;
1580         fs.addr = *paddr;
1581         ret = usb_host_scan(&fs, usb_host_find_device_scan);
1582         if (ret)
1583             pstrcpy(product_name, product_name_size, fs.product_name);
1584         return 0;
1585     }
1586
1587     p = strchr(devname, ':');
1588     if (p) {
1589         fs.vendor_id = strtoul(devname, NULL, 16);
1590         fs.product_id = strtoul(p + 1, NULL, 16);
1591         ret = usb_host_scan(&fs, usb_host_find_device_scan);
1592         if (ret) {
1593             *pbus_num = fs.bus_num;
1594             *paddr = fs.addr;
1595             pstrcpy(product_name, product_name_size, fs.product_name);
1596             return 0;
1597         }
1598     }
1599     return -1;
1600 }
1601
1602 /**********************/
1603 /* USB host device info */
1604
1605 struct usb_class_info {
1606     int class;
1607     const char *class_name;
1608 };
1609
1610 static const struct usb_class_info usb_class_info[] = {
1611     { USB_CLASS_AUDIO, "Audio"},
1612     { USB_CLASS_COMM, "Communication"},
1613     { USB_CLASS_HID, "HID"},
1614     { USB_CLASS_HUB, "Hub" },
1615     { USB_CLASS_PHYSICAL, "Physical" },
1616     { USB_CLASS_PRINTER, "Printer" },
1617     { USB_CLASS_MASS_STORAGE, "Storage" },
1618     { USB_CLASS_CDC_DATA, "Data" },
1619     { USB_CLASS_APP_SPEC, "Application Specific" },
1620     { USB_CLASS_VENDOR_SPEC, "Vendor Specific" },
1621     { USB_CLASS_STILL_IMAGE, "Still Image" },
1622     { USB_CLASS_CSCID, "Smart Card" },
1623     { USB_CLASS_CONTENT_SEC, "Content Security" },
1624     { -1, NULL }
1625 };
1626
1627 static const char *usb_class_str(uint8_t class)
1628 {
1629     const struct usb_class_info *p;
1630     for(p = usb_class_info; p->class != -1; p++) {
1631         if (p->class == class)
1632             break;
1633     }
1634     return p->class_name;
1635 }
1636
1637 static void usb_info_device(Monitor *mon, int bus_num, int addr, int class_id,
1638                             int vendor_id, int product_id,
1639                             const char *product_name,
1640                             int speed)
1641 {
1642     const char *class_str, *speed_str;
1643
1644     switch(speed) {
1645     case USB_SPEED_LOW:
1646         speed_str = "1.5";
1647         break;
1648     case USB_SPEED_FULL:
1649         speed_str = "12";
1650         break;
1651     case USB_SPEED_HIGH:
1652         speed_str = "480";
1653         break;
1654     default:
1655         speed_str = "?";
1656         break;
1657     }
1658
1659     monitor_printf(mon, "  Device %d.%d, speed %s Mb/s\n",
1660                 bus_num, addr, speed_str);
1661     class_str = usb_class_str(class_id);
1662     if (class_str)
1663         monitor_printf(mon, "    %s:", class_str);
1664     else
1665         monitor_printf(mon, "    Class %02x:", class_id);
1666     monitor_printf(mon, " USB device %04x:%04x", vendor_id, product_id);
1667     if (product_name[0] != '\0')
1668         monitor_printf(mon, ", %s", product_name);
1669     monitor_printf(mon, "\n");
1670 }
1671
1672 static int usb_host_info_device(void *opaque, int bus_num, int addr,
1673                                 int class_id,
1674                                 int vendor_id, int product_id,
1675                                 const char *product_name,
1676                                 int speed)
1677 {
1678     Monitor *mon = opaque;
1679
1680     usb_info_device(mon, bus_num, addr, class_id, vendor_id, product_id,
1681                     product_name, speed);
1682     return 0;
1683 }
1684
1685 static void dec2str(int val, char *str, size_t size)
1686 {
1687     if (val == -1)
1688         snprintf(str, size, "*");
1689     else
1690         snprintf(str, size, "%d", val);
1691 }
1692
1693 static void hex2str(int val, char *str, size_t size)
1694 {
1695     if (val == -1)
1696         snprintf(str, size, "*");
1697     else
1698         snprintf(str, size, "%x", val);
1699 }
1700
1701 void usb_host_info(Monitor *mon)
1702 {
1703     struct USBAutoFilter *f;
1704
1705     usb_host_scan(mon, usb_host_info_device);
1706
1707     if (usb_auto_filter)
1708         monitor_printf(mon, "  Auto filters:\n");
1709     for (f = usb_auto_filter; f; f = f->next) {
1710         char bus[10], addr[10], vid[10], pid[10];
1711         dec2str(f->bus_num, bus, sizeof(bus));
1712         dec2str(f->addr, addr, sizeof(addr));
1713         hex2str(f->vendor_id, vid, sizeof(vid));
1714         hex2str(f->product_id, pid, sizeof(pid));
1715         monitor_printf(mon, "    Device %s.%s ID %s:%s\n",
1716                        bus, addr, vid, pid);
1717     }
1718 }