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 "console.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[1024];
 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_del_addr(0, 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
 556     /*
 557      * Process certain standard device requests.
 558      * These are infrequent and are processed synchronously.
 559      */
 560     value = le16_to_cpu(s->ctrl.req.wValue);
 561     index = le16_to_cpu(s->ctrl.req.wIndex);
 562
 563     dprintf("husb: ctrl type 0x%x req 0x%x val 0x%x index %u len %u\n",
 564         s->ctrl.req.bRequestType, s->ctrl.req.bRequest, value, index,
 565         s->ctrl.len);
 566
 567     if (s->ctrl.req.bRequestType == 0) {
 568         switch (s->ctrl.req.bRequest) {
 569         case USB_REQ_SET_ADDRESS:
 570             return usb_host_set_address(s, value);
 571
 572         case USB_REQ_SET_CONFIGURATION:
 573             return usb_host_set_config(s, value & 0xff);
 574         }
 575     }
 576
 577     if (s->ctrl.req.bRequestType == 1 &&
 578                   s->ctrl.req.bRequest == USB_REQ_SET_INTERFACE)
 579         return usb_host_set_interface(s, index, value);
 580
 581     /* The rest are asynchronous */
 582
 583     aurb = async_alloc();
 584     aurb->hdev   = s;
 585     aurb->packet = p;
 586
 587     /*
 588      * Setup ctrl transfer.
 589      *
 590      * s->ctrl is layed out such that data buffer immediately follows
 591      * 'req' struct which is exactly what usbdevfs expects.
 592      */
 593     urb = &aurb->urb;
 594
 595     urb->type     = USBDEVFS_URB_TYPE_CONTROL;
 596     urb->endpoint = p->devep;
 597
 598     urb->buffer        = &s->ctrl.req;
 599     urb->buffer_length = 8 + s->ctrl.len;
 600
 601     urb->usercontext = s;
 602
 603     ret = ioctl(s->fd, USBDEVFS_SUBMITURB, urb);
 604
 605     dprintf("husb: submit ctrl. len %u aurb %p\n", urb->buffer_length, aurb);
 606
 607     if (ret < 0) {
 608         dprintf("husb: submit failed. errno %d\n", errno);
 609         async_free(aurb);
 610
 611         switch(errno) {
 612         case ETIMEDOUT:
 613             return USB_RET_NAK;
 614         case EPIPE:
 615         default:
 616             return USB_RET_STALL;
 617         }
 618     }
 619
 620     usb_defer_packet(p, async_cancel, aurb);
 621     return USB_RET_ASYNC;
 622 }
 623
 624 static int do_token_setup(USBDevice *dev, USBPacket *p)
 625 {
 626     USBHostDevice *s = (USBHostDevice *) dev;
 627     int ret = 0;
 628
 629     if (p->len != 8)
 630         return USB_RET_STALL;
 631
 632     memcpy(&s->ctrl.req, p->data, 8);
 633     s->ctrl.len    = le16_to_cpu(s->ctrl.req.wLength);
 634     s->ctrl.offset = 0;
 635     s->ctrl.state  = CTRL_STATE_SETUP;
 636
 637     if (s->ctrl.req.bRequestType & USB_DIR_IN) {
 638         ret = usb_host_handle_control(s, p);
 639         if (ret < 0)
 640             return ret;
 641
 642         if (ret < s->ctrl.len)
 643             s->ctrl.len = ret;
 644         s->ctrl.state = CTRL_STATE_DATA;
 645     } else {
 646         if (s->ctrl.len == 0)
 647             s->ctrl.state = CTRL_STATE_ACK;
 648         else
 649             s->ctrl.state = CTRL_STATE_DATA;
 650     }
 651
 652     return ret;
 653 }
 654
 655 static int do_token_in(USBDevice *dev, USBPacket *p)
 656 {
 657     USBHostDevice *s = (USBHostDevice *) dev;
 658     int ret = 0;
 659
 660     if (p->devep != 0)
 661         return usb_host_handle_data(s, p);
 662
 663     switch(s->ctrl.state) {
 664     case CTRL_STATE_ACK:
 665         if (!(s->ctrl.req.bRequestType & USB_DIR_IN)) {
 666             ret = usb_host_handle_control(s, p);
 667             if (ret == USB_RET_ASYNC)
 668                 return USB_RET_ASYNC;
 669
 670             s->ctrl.state = CTRL_STATE_IDLE;
 671             return ret > 0 ? 0 : ret;
 672         }
 673
 674         return 0;
 675
 676     case CTRL_STATE_DATA:
 677         if (s->ctrl.req.bRequestType & USB_DIR_IN) {
 678             int len = s->ctrl.len - s->ctrl.offset;
 679             if (len > p->len)
 680                 len = p->len;
 681             memcpy(p->data, s->ctrl.buffer + s->ctrl.offset, len);
 682             s->ctrl.offset += len;
 683             if (s->ctrl.offset >= s->ctrl.len)
 684                 s->ctrl.state = CTRL_STATE_ACK;
 685             return len;
 686         }
 687
 688         s->ctrl.state = CTRL_STATE_IDLE;
 689         return USB_RET_STALL;
 690
 691     default:
 692         return USB_RET_STALL;
 693     }
 694 }
 695
 696 static int do_token_out(USBDevice *dev, USBPacket *p)
 697 {
 698     USBHostDevice *s = (USBHostDevice *) dev;
 699
 700     if (p->devep != 0)
 701         return usb_host_handle_data(s, p);
 702
 703     switch(s->ctrl.state) {
 704     case CTRL_STATE_ACK:
 705         if (s->ctrl.req.bRequestType & USB_DIR_IN) {
 706             s->ctrl.state = CTRL_STATE_IDLE;
 707             /* transfer OK */
 708         } else {
 709             /* ignore additional output */
 710         }
 711         return 0;
 712
 713     case CTRL_STATE_DATA:
 714         if (!(s->ctrl.req.bRequestType & USB_DIR_IN)) {
 715             int len = s->ctrl.len - s->ctrl.offset;
 716             if (len > p->len)
 717                 len = p->len;
 718             memcpy(s->ctrl.buffer + s->ctrl.offset, p->data, len);
 719             s->ctrl.offset += len;
 720             if (s->ctrl.offset >= s->ctrl.len)
 721                 s->ctrl.state = CTRL_STATE_ACK;
 722             return len;
 723         }
 724
 725         s->ctrl.state = CTRL_STATE_IDLE;
 726         return USB_RET_STALL;
 727
 728     default:
 729         return USB_RET_STALL;
 730     }
 731 }
 732
 733 /*
 734  * Packet handler.
 735  * Called by the HC (host controller).
 736  *
 737  * Returns length of the transaction or one of the USB_RET_XXX codes.
 738  */
 739 static int usb_host_handle_packet(USBDevice *s, USBPacket *p)
 740 {
 741     switch(p->pid) {
 742     case USB_MSG_ATTACH:
 743         s->state = USB_STATE_ATTACHED;
 744         return 0;
 745
 746     case USB_MSG_DETACH:
 747         s->state = USB_STATE_NOTATTACHED;
 748         return 0;
 749
 750     case USB_MSG_RESET:
 751         s->remote_wakeup = 0;
 752         s->addr = 0;
 753         s->state = USB_STATE_DEFAULT;
 754         s->handle_reset(s);
 755         return 0;
 756     }
 757
 758     /* Rest of the PIDs must match our address */
 759     if (s->state < USB_STATE_DEFAULT || p->devaddr != s->addr)
 760         return USB_RET_NODEV;
 761
 762     switch (p->pid) {
 763     case USB_TOKEN_SETUP:
 764         return do_token_setup(s, p);
 765
 766     case USB_TOKEN_IN:
 767         return do_token_in(s, p);
 768
 769     case USB_TOKEN_OUT:
 770         return do_token_out(s, p);
 771
 772     default:
 773         return USB_RET_STALL;
 774     }
 775 }
 776
 777 /* returns 1 on problem encountered or 0 for success */
 778 static int usb_linux_update_endp_table(USBHostDevice *s)
 779 {
 780     uint8_t *descriptors;
 781     uint8_t devep, type, configuration, alt_interface;
 782     struct usb_ctrltransfer ct;
 783     int interface, ret, length, i;
 784
 785     ct.bRequestType = USB_DIR_IN;
 786     ct.bRequest = USB_REQ_GET_CONFIGURATION;
 787     ct.wValue = 0;
 788     ct.wIndex = 0;
 789     ct.wLength = 1;
 790     ct.data = &configuration;
 791     ct.timeout = 50;
 792
 793     ret = ioctl(s->fd, USBDEVFS_CONTROL, &ct);
 794     if (ret < 0) {
 795         perror("usb_linux_update_endp_table");
 796         return 1;
 797     }
 798
 799     /* in address state */
 800     if (configuration == 0)
 801         return 1;
 802
 803     /* get the desired configuration, interface, and endpoint descriptors
 804      * from device description */
 805     descriptors = &s->descr[18];
 806     length = s->descr_len - 18;
 807     i = 0;
 808
 809     if (descriptors[i + 1] != USB_DT_CONFIG ||
 810         descriptors[i + 5] != configuration) {
 811         dprintf("invalid descriptor data - configuration\n");
 812         return 1;
 813     }
 814     i += descriptors[i];
 815
 816     while (i < length) {
 817         if (descriptors[i + 1] != USB_DT_INTERFACE ||
 818             (descriptors[i + 1] == USB_DT_INTERFACE &&
 819              descriptors[i + 4] == 0)) {
 820             i += descriptors[i];
 821             continue;
 822         }
 823
 824         interface = descriptors[i + 2];
 825
 826         ct.bRequestType = USB_DIR_IN | USB_RECIP_INTERFACE;
 827         ct.bRequest = USB_REQ_GET_INTERFACE;
 828         ct.wValue = 0;
 829         ct.wIndex = interface;
 830         ct.wLength = 1;
 831         ct.data = &alt_interface;
 832         ct.timeout = 50;
 833
 834         ret = ioctl(s->fd, USBDEVFS_CONTROL, &ct);
 835         if (ret < 0) {
 836             perror("usb_linux_update_endp_table");
 837             return 1;
 838         }
 839
 840         /* the current interface descriptor is the active interface
 841          * and has endpoints */
 842         if (descriptors[i + 3] != alt_interface) {
 843             i += descriptors[i];
 844             continue;
 845         }
 846
 847         /* advance to the endpoints */
 848         while (i < length && descriptors[i +1] != USB_DT_ENDPOINT)
 849             i += descriptors[i];
 850
 851         if (i >= length)
 852             break;
 853
 854         while (i < length) {
 855             if (descriptors[i + 1] != USB_DT_ENDPOINT)
 856                 break;
 857
 858             devep = descriptors[i + 2];
 859             switch (descriptors[i + 3] & 0x3) {
 860             case 0x00:
 861                 type = USBDEVFS_URB_TYPE_CONTROL;
 862                 break;
 863             case 0x01:
 864                 type = USBDEVFS_URB_TYPE_ISO;
 865                 break;
 866             case 0x02:
 867                 type = USBDEVFS_URB_TYPE_BULK;
 868                 break;
 869             case 0x03:
 870                 type = USBDEVFS_URB_TYPE_INTERRUPT;
 871                 break;
 872             default:
 873                 dprintf("usb_host: malformed endpoint type\n");
 874                 type = USBDEVFS_URB_TYPE_BULK;
 875             }
 876             s->endp_table[(devep & 0xf) - 1].type = type;
 877             s->endp_table[(devep & 0xf) - 1].halted = 0;
 878
 879             i += descriptors[i];
 880         }
 881     }
 882     return 0;
 883 }
 884
 885 static USBDevice *usb_host_device_open_addr(int bus_num, int addr, const char *prod_name)
 886 {
 887     int fd = -1, ret;
 888     USBHostDevice *dev = NULL;
 889     struct usbdevfs_connectinfo ci;
 890     char buf[1024];
 891
 892     dev = qemu_mallocz(sizeof(USBHostDevice));
 893
 894     dev->bus_num = bus_num;
 895     dev->addr = addr;
 896
 897     printf("husb: open device %d.%d\n", bus_num, addr);
 898
 899     if (!usb_host_device_path) {
 900         perror("husb: USB Host Device Path not set");
 901         goto fail;
 902     }
 903     snprintf(buf, sizeof(buf), "%s/%03d/%03d", usb_host_device_path,
 904              bus_num, addr);
 905     fd = open(buf, O_RDWR | O_NONBLOCK);
 906     if (fd < 0) {
 907         perror(buf);
 908         goto fail;
 909     }
 910     dprintf("husb: opened %s\n", buf);
 911
 912     /* read the device description */
 913     dev->descr_len = read(fd, dev->descr, sizeof(dev->descr));
 914     if (dev->descr_len <= 0) {
 915         perror("husb: reading device data failed");
 916         goto fail;
 917     }
 918
 919 #ifdef DEBUG
 920     {
 921         int x;
 922         printf("=== begin dumping device descriptor data ===\n");
 923         for (x = 0; x < dev->descr_len; x++)
 924             printf("%02x ", dev->descr[x]);
 925         printf("\n=== end dumping device descriptor data ===\n");
 926     }
 927 #endif
 928
 929     dev->fd = fd;
 930
 931     /*
 932      * Initial configuration is -1 which makes us claim first
 933      * available config. We used to start with 1, which does not
 934      * always work. I've seen devices where first config starts
 935      * with 2.
 936      */
 937     if (!usb_host_claim_interfaces(dev, -1))
 938         goto fail;
 939
 940     ret = ioctl(fd, USBDEVFS_CONNECTINFO, &ci);
 941     if (ret < 0) {
 942         perror("usb_host_device_open: USBDEVFS_CONNECTINFO");
 943         goto fail;
 944     }
 945
 946     printf("husb: grabbed usb device %d.%d\n", bus_num, addr);
 947
 948     ret = usb_linux_update_endp_table(dev);
 949     if (ret)
 950         goto fail;
 951
 952     if (ci.slow)
 953         dev->dev.speed = USB_SPEED_LOW;
 954     else
 955         dev->dev.speed = USB_SPEED_HIGH;
 956
 957     dev->dev.handle_packet  = usb_host_handle_packet;
 958     dev->dev.handle_reset   = usb_host_handle_reset;
 959     dev->dev.handle_destroy = usb_host_handle_destroy;
 960
 961     if (!prod_name || prod_name[0] == '\0')
 962         snprintf(dev->dev.devname, sizeof(dev->dev.devname),
 963                  "host:%d.%d", bus_num, addr);
 964     else
 965         pstrcpy(dev->dev.devname, sizeof(dev->dev.devname),
 966                 prod_name);
 967
 968     /* USB devio uses 'write' flag to check for async completions */
 969     qemu_set_fd_handler(dev->fd, NULL, async_complete, dev);
 970
 971     hostdev_link(dev);
 972
 973     return (USBDevice *) dev;
 974
 975 fail:
 976     if (dev)
 977         qemu_free(dev);
 978
 979     close(fd);
 980     return NULL;
 981 }
 982
 983 static int usb_host_auto_add(const char *spec);
 984 static int usb_host_auto_del(const char *spec);
 985
 986 USBDevice *usb_host_device_open(const char *devname)
 987 {
 988     int bus_num, addr;
 989     char product_name[PRODUCT_NAME_SZ];
 990
 991     if (strstr(devname, "auto:")) {
 992         usb_host_auto_add(devname);
 993         return NULL;
 994     }
 995
 996     if (usb_host_find_device(&bus_num, &addr, product_name, sizeof(product_name),
 997                              devname) < 0)
 998         return NULL;
 999
1000     if (hostdev_find(bus_num, addr)) {
1001        term_printf("husb: host usb device %d.%d is already open\n", bus_num, addr);
1002        return NULL;
1003     }
1004
1005     return usb_host_device_open_addr(bus_num, addr, product_name);
1006 }
1007
1008 int usb_host_device_close(const char *devname)
1009 {
1010     char product_name[PRODUCT_NAME_SZ];
1011     int bus_num, addr;
1012     USBHostDevice *s;
1013
1014     if (strstr(devname, "auto:"))
1015         return usb_host_auto_del(devname);
1016
1017     if (usb_host_find_device(&bus_num, &addr, product_name, sizeof(product_name),
1018                              devname) < 0)
1019         return -1;
1020
1021     s = hostdev_find(bus_num, addr);
1022     if (s) {
1023         usb_device_del_addr(0, s->dev.addr);
1024         return 0;
1025     }
1026
1027     return -1;
1028 }
1029
1030 static int get_tag_value(char *buf, int buf_size,
1031                          const char *str, const char *tag,
1032                          const char *stopchars)
1033 {
1034     const char *p;
1035     char *q;
1036     p = strstr(str, tag);
1037     if (!p)
1038         return -1;
1039     p += strlen(tag);
1040     while (qemu_isspace(*p))
1041         p++;
1042     q = buf;
1043     while (*p != '\0' && !strchr(stopchars, *p)) {
1044         if ((q - buf) < (buf_size - 1))
1045             *q++ = *p;
1046         p++;
1047     }
1048     *q = '\0';
1049     return q - buf;
1050 }
1051
1052 /*
1053  * Use /proc/bus/usb/devices or /dev/bus/usb/devices file to determine
1054  * host's USB devices. This is legacy support since many distributions
1055  * are moving to /sys/bus/usb
1056  */
1057 static int usb_host_scan_dev(void *opaque, USBScanFunc *func)
1058 {
1059     FILE *f = 0;
1060     char line[1024];
1061     char buf[1024];
1062     int bus_num, addr, speed, device_count, class_id, product_id, vendor_id;
1063     char product_name[512];
1064     int ret = 0;
1065
1066     if (!usb_host_device_path) {
1067         perror("husb: USB Host Device Path not set");
1068         goto the_end;
1069     }
1070     snprintf(line, sizeof(line), "%s/devices", usb_host_device_path);
1071     f = fopen(line, "r");
1072     if (!f) {
1073         perror("husb: cannot open devices file");
1074         goto the_end;
1075     }
1076
1077     device_count = 0;
1078     bus_num = addr = speed = class_id = product_id = vendor_id = 0;
1079     for(;;) {
1080         if (fgets(line, sizeof(line), f) == NULL)
1081             break;
1082         if (strlen(line) > 0)
1083             line[strlen(line) - 1] = '\0';
1084         if (line[0] == 'T' && line[1] == ':') {
1085             if (device_count && (vendor_id || product_id)) {
1086                 /* New device.  Add the previously discovered device.  */
1087                 ret = func(opaque, bus_num, addr, class_id, vendor_id,
1088                            product_id, product_name, speed);
1089                 if (ret)
1090                     goto the_end;
1091             }
1092             if (get_tag_value(buf, sizeof(buf), line, "Bus=", " ") < 0)
1093                 goto fail;
1094             bus_num = atoi(buf);
1095             if (get_tag_value(buf, sizeof(buf), line, "Dev#=", " ") < 0)
1096                 goto fail;
1097             addr = atoi(buf);
1098             if (get_tag_value(buf, sizeof(buf), line, "Spd=", " ") < 0)
1099                 goto fail;
1100             if (!strcmp(buf, "480"))
1101                 speed = USB_SPEED_HIGH;
1102             else if (!strcmp(buf, "1.5"))
1103                 speed = USB_SPEED_LOW;
1104             else
1105                 speed = USB_SPEED_FULL;
1106             product_name[0] = '\0';
1107             class_id = 0xff;
1108             device_count++;
1109             product_id = 0;
1110             vendor_id = 0;
1111         } else if (line[0] == 'P' && line[1] == ':') {
1112             if (get_tag_value(buf, sizeof(buf), line, "Vendor=", " ") < 0)
1113                 goto fail;
1114             vendor_id = strtoul(buf, NULL, 16);
1115             if (get_tag_value(buf, sizeof(buf), line, "ProdID=", " ") < 0)
1116                 goto fail;
1117             product_id = strtoul(buf, NULL, 16);
1118         } else if (line[0] == 'S' && line[1] == ':') {
1119             if (get_tag_value(buf, sizeof(buf), line, "Product=", "") < 0)
1120                 goto fail;
1121             pstrcpy(product_name, sizeof(product_name), buf);
1122         } else if (line[0] == 'D' && line[1] == ':') {
1123             if (get_tag_value(buf, sizeof(buf), line, "Cls=", " (") < 0)
1124                 goto fail;
1125             class_id = strtoul(buf, NULL, 16);
1126         }
1127     fail: ;
1128     }
1129     if (device_count && (vendor_id || product_id)) {
1130         /* Add the last device.  */
1131         ret = func(opaque, bus_num, addr, class_id, vendor_id,
1132                    product_id, product_name, speed);
1133     }
1134  the_end:
1135     if (f)
1136         fclose(f);
1137     return ret;
1138 }
1139
1140 /*
1141  * Read sys file-system device file
1142  *
1143  * @line address of buffer to put file contents in
1144  * @line_size size of line
1145  * @device_file path to device file (printf format string)
1146  * @device_name device being opened (inserted into device_file)
1147  *
1148  * @return 0 failed, 1 succeeded ('line' contains data)
1149  */
1150 static int usb_host_read_file(char *line, size_t line_size, const char *device_file, const char *device_name)
1151 {
1152     FILE *f;
1153     int ret = 0;
1154     char filename[PATH_MAX];
1155
1156     snprintf(filename, PATH_MAX, USBSYSBUS_PATH "/devices/%s/%s", device_name,
1157              device_file);
1158     f = fopen(filename, "r");
1159     if (f) {
1160         fgets(line, line_size, f);
1161         fclose(f);
1162         ret = 1;
1163     } else {
1164         term_printf("husb: could not open %s\n", filename);
1165     }
1166
1167     return ret;
1168 }
1169
1170 /*
1171  * Use /sys/bus/usb/devices/ directory to determine host's USB
1172  * devices.
1173  *
1174  * This code is based on Robert Schiele's original patches posted to
1175  * the Novell bug-tracker https://bugzilla.novell.com/show_bug.cgi?id=241950
1176  */
1177 static int usb_host_scan_sys(void *opaque, USBScanFunc *func)
1178 {
1179     DIR *dir = 0;
1180     char line[1024];
1181     int bus_num, addr, speed, class_id, product_id, vendor_id;
1182     int ret = 0;
1183     char product_name[512];
1184     struct dirent *de;
1185
1186     dir = opendir(USBSYSBUS_PATH "/devices");
1187     if (!dir) {
1188         perror("husb: cannot open devices directory");
1189         goto the_end;
1190     }
1191
1192     while ((de = readdir(dir))) {
1193         if (de->d_name[0] != '.' && !strchr(de->d_name, ':')) {
1194             char *tmpstr = de->d_name;
1195             if (!strncmp(de->d_name, "usb", 3))
1196                 tmpstr += 3;
1197             bus_num = atoi(tmpstr);
1198
1199             if (!usb_host_read_file(line, sizeof(line), "devnum", de->d_name))
1200                 goto the_end;
1201             if (sscanf(line, "%d", &addr) != 1)
1202                 goto the_end;
1203
1204             if (!usb_host_read_file(line, sizeof(line), "bDeviceClass",
1205                                     de->d_name))
1206                 goto the_end;
1207             if (sscanf(line, "%x", &class_id) != 1)
1208                 goto the_end;
1209
1210             if (!usb_host_read_file(line, sizeof(line), "idVendor", de->d_name))
1211                 goto the_end;
1212             if (sscanf(line, "%x", &vendor_id) != 1)
1213                 goto the_end;
1214
1215             if (!usb_host_read_file(line, sizeof(line), "idProduct",
1216                                     de->d_name))
1217                 goto the_end;
1218             if (sscanf(line, "%x", &product_id) != 1)
1219                 goto the_end;
1220
1221             if (!usb_host_read_file(line, sizeof(line), "product",
1222                                     de->d_name)) {
1223                 *product_name = 0;
1224             } else {
1225                 if (strlen(line) > 0)
1226                     line[strlen(line) - 1] = '\0';
1227                 pstrcpy(product_name, sizeof(product_name), line);
1228             }
1229
1230             if (!usb_host_read_file(line, sizeof(line), "speed", de->d_name))
1231                 goto the_end;
1232             if (!strcmp(line, "480\n"))
1233                 speed = USB_SPEED_HIGH;
1234             else if (!strcmp(line, "1.5\n"))
1235                 speed = USB_SPEED_LOW;
1236             else
1237                 speed = USB_SPEED_FULL;
1238
1239             ret = func(opaque, bus_num, addr, class_id, vendor_id,
1240                        product_id, product_name, speed);
1241             if (ret)
1242                 goto the_end;
1243         }
1244     }
1245  the_end:
1246     if (dir)
1247         closedir(dir);
1248     return ret;
1249 }
1250
1251 /*
1252  * Determine how to access the host's USB devices and call the
1253  * specific support function.
1254  */
1255 static int usb_host_scan(void *opaque, USBScanFunc *func)
1256 {
1257     FILE *f = 0;
1258     DIR *dir = 0;
1259     int ret = 0;
1260     const char *fs_type[] = {"unknown", "proc", "dev", "sys"};
1261     char devpath[PATH_MAX];
1262
1263     /* only check the host once */
1264     if (!usb_fs_type) {
1265         f = fopen(USBPROCBUS_PATH "/devices", "r");
1266         if (f) {
1267             /* devices found in /proc/bus/usb/ */
1268             strcpy(devpath, USBPROCBUS_PATH);
1269             usb_fs_type = USB_FS_PROC;
1270             fclose(f);
1271             dprintf(USBDBG_DEVOPENED, USBPROCBUS_PATH);
1272             goto found_devices;
1273         }
1274         /* try additional methods if an access method hasn't been found yet */
1275         f = fopen(USBDEVBUS_PATH "/devices", "r");
1276         if (f) {
1277             /* devices found in /dev/bus/usb/ */
1278             strcpy(devpath, USBDEVBUS_PATH);
1279             usb_fs_type = USB_FS_DEV;
1280             fclose(f);
1281             dprintf(USBDBG_DEVOPENED, USBDEVBUS_PATH);
1282             goto found_devices;
1283         }
1284         dir = opendir(USBSYSBUS_PATH "/devices");
1285         if (dir) {
1286             /* devices found in /dev/bus/usb/ (yes - not a mistake!) */
1287             strcpy(devpath, USBDEVBUS_PATH);
1288             usb_fs_type = USB_FS_SYS;
1289             closedir(dir);
1290             dprintf(USBDBG_DEVOPENED, USBSYSBUS_PATH);
1291             goto found_devices;
1292         }
1293     found_devices:
1294         if (!usb_fs_type) {
1295             term_printf("husb: unable to access USB devices\n");
1296             return -ENOENT;
1297         }
1298
1299         /* the module setting (used later for opening devices) */
1300         usb_host_device_path = qemu_mallocz(strlen(devpath)+1);
1301         strcpy(usb_host_device_path, devpath);
1302         term_printf("husb: using %s file-system with %s\n", fs_type[usb_fs_type], usb_host_device_path);
1303     }
1304
1305     switch (usb_fs_type) {
1306     case USB_FS_PROC:
1307     case USB_FS_DEV:
1308         ret = usb_host_scan_dev(opaque, func);
1309         break;
1310     case USB_FS_SYS:
1311         ret = usb_host_scan_sys(opaque, func);
1312         break;
1313     default:
1314         ret = -EINVAL;
1315         break;
1316     }
1317     return ret;
1318 }
1319
1320 struct USBAutoFilter {
1321     struct USBAutoFilter *next;
1322     int bus_num;
1323     int addr;
1324     int vendor_id;
1325     int product_id;
1326 };
1327
1328 static QEMUTimer *usb_auto_timer;
1329 static struct USBAutoFilter *usb_auto_filter;
1330
1331 static int usb_host_auto_scan(void *opaque, int bus_num, int addr,
1332                      int class_id, int vendor_id, int product_id,
1333                      const char *product_name, int speed)
1334 {
1335     struct USBAutoFilter *f;
1336     struct USBDevice *dev;
1337
1338     /* Ignore hubs */
1339     if (class_id == 9)
1340         return 0;
1341
1342     for (f = usb_auto_filter; f; f = f->next) {
1343         if (f->bus_num >= 0 && f->bus_num != bus_num)
1344             continue;
1345
1346         if (f->addr >= 0 && f->addr != addr)
1347             continue;
1348
1349         if (f->vendor_id >= 0 && f->vendor_id != vendor_id)
1350             continue;
1351
1352         if (f->product_id >= 0 && f->product_id != product_id)
1353             continue;
1354
1355         /* We got a match */
1356
1357         /* Allredy attached ? */
1358         if (hostdev_find(bus_num, addr))
1359             return 0;
1360
1361         dprintf("husb: auto open: bus_num %d addr %d\n", bus_num, addr);
1362
1363         dev = usb_host_device_open_addr(bus_num, addr, product_name);
1364         if (dev)
1365             usb_device_add_dev(dev);
1366     }
1367
1368     return 0;
1369 }
1370
1371 static void usb_host_auto_timer(void *unused)
1372 {
1373     usb_host_scan(NULL, usb_host_auto_scan);
1374     qemu_mod_timer(usb_auto_timer, qemu_get_clock(rt_clock) + 2000);
1375 }
1376
1377 /*
1378  * Autoconnect filter
1379  * Format:
1380  *    auto:bus:dev[:vid:pid]
1381  *    auto:bus.dev[:vid:pid]
1382  *
1383  *    bus  - bus number    (dec, * means any)
1384  *    dev  - device number (dec, * means any)
1385  *    vid  - vendor id     (hex, * means any)
1386  *    pid  - product id    (hex, * means any)
1387  *
1388  *    See 'lsusb' output.
1389  */
1390 static int parse_filter(const char *spec, struct USBAutoFilter *f)
1391 {
1392     enum { BUS, DEV, VID, PID, DONE };
1393     const char *p = spec;
1394     int i;
1395
1396     f->bus_num    = -1;
1397     f->addr       = -1;
1398     f->vendor_id  = -1;
1399     f->product_id = -1;
1400
1401     for (i = BUS; i < DONE; i++) {
1402         p = strpbrk(p, ":.");
1403         if (!p) break;
1404         p++;
1405
1406         if (*p == '*')
1407             continue;
1408
1409         switch(i) {
1410         case BUS: f->bus_num = strtol(p, NULL, 10);    break;
1411         case DEV: f->addr    = strtol(p, NULL, 10);    break;
1412         case VID: f->vendor_id  = strtol(p, NULL, 16); break;
1413         case PID: f->product_id = strtol(p, NULL, 16); break;
1414         }
1415     }
1416
1417     if (i < DEV) {
1418         fprintf(stderr, "husb: invalid auto filter spec %s\n", spec);
1419         return -1;
1420     }
1421
1422     return 0;
1423 }
1424
1425 static int match_filter(const struct USBAutoFilter *f1,
1426                         const struct USBAutoFilter *f2)
1427 {
1428     return f1->bus_num    == f2->bus_num &&
1429            f1->addr       == f2->addr &&
1430            f1->vendor_id  == f2->vendor_id &&
1431            f1->product_id == f2->product_id;
1432 }
1433
1434 static int usb_host_auto_add(const char *spec)
1435 {
1436     struct USBAutoFilter filter, *f;
1437
1438     if (parse_filter(spec, &filter) < 0)
1439         return -1;
1440
1441     f = qemu_mallocz(sizeof(*f));
1442
1443     *f = filter;
1444
1445     if (!usb_auto_filter) {
1446         /*
1447          * First entry. Init and start the monitor.
1448          * Right now we're using timer to check for new devices.
1449          * If this turns out to be too expensive we can move that into a
1450          * separate thread.
1451          */
1452         usb_auto_timer = qemu_new_timer(rt_clock, usb_host_auto_timer, NULL);
1453         if (!usb_auto_timer) {
1454             fprintf(stderr, "husb: failed to allocate auto scan timer\n");
1455             qemu_free(f);
1456             return -1;
1457         }
1458
1459         /* Check for new devices every two seconds */
1460         qemu_mod_timer(usb_auto_timer, qemu_get_clock(rt_clock) + 2000);
1461     }
1462
1463     dprintf("husb: added auto filter: bus_num %d addr %d vid %d pid %d\n",
1464         f->bus_num, f->addr, f->vendor_id, f->product_id);
1465
1466     f->next = usb_auto_filter;
1467     usb_auto_filter = f;
1468
1469     return 0;
1470 }
1471
1472 static int usb_host_auto_del(const char *spec)
1473 {
1474     struct USBAutoFilter *pf = usb_auto_filter;
1475     struct USBAutoFilter **prev = &usb_auto_filter;
1476     struct USBAutoFilter filter;
1477
1478     if (parse_filter(spec, &filter) < 0)
1479         return -1;
1480
1481     while (pf) {
1482         if (match_filter(pf, &filter)) {
1483             dprintf("husb: removed auto filter: bus_num %d addr %d vid %d pid %d\n",
1484                      pf->bus_num, pf->addr, pf->vendor_id, pf->product_id);
1485
1486             *prev = pf->next;
1487
1488             if (!usb_auto_filter) {
1489                 /* No more filters. Stop scanning. */
1490                 qemu_del_timer(usb_auto_timer);
1491                 qemu_free_timer(usb_auto_timer);
1492             }
1493
1494             return 0;
1495         }
1496
1497         prev = &pf->next;
1498         pf   = pf->next;
1499     }
1500
1501     return -1;
1502 }
1503
1504 typedef struct FindDeviceState {
1505     int vendor_id;
1506     int product_id;
1507     int bus_num;
1508     int addr;
1509     char product_name[PRODUCT_NAME_SZ];
1510 } FindDeviceState;
1511
1512 static int usb_host_find_device_scan(void *opaque, int bus_num, int addr,
1513                                      int class_id,
1514                                      int vendor_id, int product_id,
1515                                      const char *product_name, int speed)
1516 {
1517     FindDeviceState *s = opaque;
1518     if ((vendor_id == s->vendor_id &&
1519         product_id == s->product_id) ||
1520         (bus_num == s->bus_num &&
1521         addr == s->addr)) {
1522         pstrcpy(s->product_name, PRODUCT_NAME_SZ, product_name);
1523         s->bus_num = bus_num;
1524         s->addr = addr;
1525         return 1;
1526     } else {
1527         return 0;
1528     }
1529 }
1530
1531 /* the syntax is :
1532    'bus.addr' (decimal numbers) or
1533    'vendor_id:product_id' (hexa numbers) */
1534 static int usb_host_find_device(int *pbus_num, int *paddr,
1535                                 char *product_name, int product_name_size,
1536                                 const char *devname)
1537 {
1538     const char *p;
1539     int ret;
1540     FindDeviceState fs;
1541
1542     p = strchr(devname, '.');
1543     if (p) {
1544         *pbus_num = strtoul(devname, NULL, 0);
1545         *paddr = strtoul(p + 1, NULL, 0);
1546         fs.bus_num = *pbus_num;
1547         fs.addr = *paddr;
1548         ret = usb_host_scan(&fs, usb_host_find_device_scan);
1549         if (ret)
1550             pstrcpy(product_name, product_name_size, fs.product_name);
1551         return 0;
1552     }
1553
1554     p = strchr(devname, ':');
1555     if (p) {
1556         fs.vendor_id = strtoul(devname, NULL, 16);
1557         fs.product_id = strtoul(p + 1, NULL, 16);
1558         ret = usb_host_scan(&fs, usb_host_find_device_scan);
1559         if (ret) {
1560             *pbus_num = fs.bus_num;
1561             *paddr = fs.addr;
1562             pstrcpy(product_name, product_name_size, fs.product_name);
1563             return 0;
1564         }
1565     }
1566     return -1;
1567 }
1568
1569 /**********************/
1570 /* USB host device info */
1571
1572 struct usb_class_info {
1573     int class;
1574     const char *class_name;
1575 };
1576
1577 static const struct usb_class_info usb_class_info[] = {
1578     { USB_CLASS_AUDIO, "Audio"},
1579     { USB_CLASS_COMM, "Communication"},
1580     { USB_CLASS_HID, "HID"},
1581     { USB_CLASS_HUB, "Hub" },
1582     { USB_CLASS_PHYSICAL, "Physical" },
1583     { USB_CLASS_PRINTER, "Printer" },
1584     { USB_CLASS_MASS_STORAGE, "Storage" },
1585     { USB_CLASS_CDC_DATA, "Data" },
1586     { USB_CLASS_APP_SPEC, "Application Specific" },
1587     { USB_CLASS_VENDOR_SPEC, "Vendor Specific" },
1588     { USB_CLASS_STILL_IMAGE, "Still Image" },
1589     { USB_CLASS_CSCID, "Smart Card" },
1590     { USB_CLASS_CONTENT_SEC, "Content Security" },
1591     { -1, NULL }
1592 };
1593
1594 static const char *usb_class_str(uint8_t class)
1595 {
1596     const struct usb_class_info *p;
1597     for(p = usb_class_info; p->class != -1; p++) {
1598         if (p->class == class)
1599             break;
1600     }
1601     return p->class_name;
1602 }
1603
1604 static void usb_info_device(int bus_num, int addr, int class_id,
1605                             int vendor_id, int product_id,
1606                             const char *product_name,
1607                             int speed)
1608 {
1609     const char *class_str, *speed_str;
1610
1611     switch(speed) {
1612     case USB_SPEED_LOW:
1613         speed_str = "1.5";
1614         break;
1615     case USB_SPEED_FULL:
1616         speed_str = "12";
1617         break;
1618     case USB_SPEED_HIGH:
1619         speed_str = "480";
1620         break;
1621     default:
1622         speed_str = "?";
1623         break;
1624     }
1625
1626     term_printf("  Device %d.%d, speed %s Mb/s\n",
1627                 bus_num, addr, speed_str);
1628     class_str = usb_class_str(class_id);
1629     if (class_str)
1630         term_printf("    %s:", class_str);
1631     else
1632         term_printf("    Class %02x:", class_id);
1633     term_printf(" USB device %04x:%04x", vendor_id, product_id);
1634     if (product_name[0] != '\0')
1635         term_printf(", %s", product_name);
1636     term_printf("\n");
1637 }
1638
1639 static int usb_host_info_device(void *opaque, int bus_num, int addr,
1640                                 int class_id,
1641                                 int vendor_id, int product_id,
1642                                 const char *product_name,
1643                                 int speed)
1644 {
1645     usb_info_device(bus_num, addr, class_id, vendor_id, product_id,
1646                     product_name, speed);
1647     return 0;
1648 }
1649
1650 static void dec2str(int val, char *str, size_t size)
1651 {
1652     if (val == -1)
1653         snprintf(str, size, "*");
1654     else
1655         snprintf(str, size, "%d", val);
1656 }
1657
1658 static void hex2str(int val, char *str, size_t size)
1659 {
1660     if (val == -1)
1661         snprintf(str, size, "*");
1662     else
1663         snprintf(str, size, "%x", val);
1664 }
1665
1666 void usb_host_info(void)
1667 {
1668     struct USBAutoFilter *f;
1669
1670     usb_host_scan(NULL, usb_host_info_device);
1671
1672     if (usb_auto_filter)
1673         term_printf("  Auto filters:\n");
1674     for (f = usb_auto_filter; f; f = f->next) {
1675         char bus[10], addr[10], vid[10], pid[10];
1676         dec2str(f->bus_num, bus, sizeof(bus));
1677         dec2str(f->addr, addr, sizeof(addr));
1678         hex2str(f->vendor_id, vid, sizeof(vid));
1679         hex2str(f->product_id, pid, sizeof(pid));
1680         term_printf("    Device %s.%s ID %s:%s\n", bus, addr, vid, pid);
1681     }
1682 }