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 #if defined(__linux__)
  38 #include <dirent.h>
  39 #include <sys/ioctl.h>
  40 #include <signal.h>
  41
  42 #include <linux/usbdevice_fs.h>
  43 #include <linux/version.h>
  44 #include "hw/usb.h"
  45
  46 /* We redefine it to avoid version problems */
  47 struct usb_ctrltransfer {
  48     uint8_t  bRequestType;
  49     uint8_t  bRequest;
  50     uint16_t wValue;
  51     uint16_t wIndex;
  52     uint16_t wLength;
  53     uint32_t timeout;
  54     void *data;
  55 };
  56
  57 struct usb_ctrlrequest {
  58     uint8_t bRequestType;
  59     uint8_t bRequest;
  60     uint16_t wValue;
  61     uint16_t wIndex;
  62     uint16_t wLength;
  63 };
  64
  65 typedef int USBScanFunc(void *opaque, int bus_num, int addr, int class_id,
  66                         int vendor_id, int product_id,
  67                         const char *product_name, int speed);
  68 static int usb_host_find_device(int *pbus_num, int *paddr,
  69                                 char *product_name, int product_name_size,
  70                                 const char *devname);
  71 //#define DEBUG
  72
  73 #ifdef DEBUG
  74 #define dprintf printf
  75 #else
  76 #define dprintf(...)
  77 #endif
  78
  79 #define USBDBG_DEVOPENED "husb: opened %s/devices\n"
  80
  81 #define USBPROCBUS_PATH "/proc/bus/usb"
  82 #define PRODUCT_NAME_SZ 32
  83 #define MAX_ENDPOINTS 16
  84 #define USBDEVBUS_PATH "/dev/bus/usb"
  85 #define USBSYSBUS_PATH "/sys/bus/usb"
  86
  87 static char *usb_host_device_path;
  88
  89 #define USB_FS_NONE 0
  90 #define USB_FS_PROC 1
  91 #define USB_FS_DEV 2
  92 #define USB_FS_SYS 3
  93
  94 static int usb_fs_type;
  95
  96 /* endpoint association data */
  97 struct endp_data {
  98     uint8_t type;
  99     uint8_t halted;
 100 };
 101
 102 enum {
 103     CTRL_STATE_IDLE = 0,
 104     CTRL_STATE_SETUP,
 105     CTRL_STATE_DATA,
 106     CTRL_STATE_ACK
 107 };
 108
 109 /*
 110  * Control transfer state.
 111  * Note that 'buffer' _must_ follow 'req' field because
 112  * we need contigious buffer when we submit control URB.
 113  */
 114 struct ctrl_struct {
 115     uint16_t len;
 116     uint16_t offset;
 117     uint8_t  state;
 118     struct   usb_ctrlrequest req;
 119     uint8_t  buffer[1024];
 120 };
 121
 122 typedef struct USBHostDevice {
 123     USBDevice dev;
 124     int       fd;
 125
 126     uint8_t   descr[1024];
 127     int       descr_len;
 128     int       configuration;
 129     int       ninterfaces;
 130     int       closing;
 131
 132     struct ctrl_struct ctrl;
 133     struct endp_data endp_table[MAX_ENDPOINTS];
 134
 135     /* Host side address */
 136     int bus_num;
 137     int addr;
 138
 139     struct USBHostDevice *next;
 140 } USBHostDevice;
 141
 142 static int is_isoc(USBHostDevice *s, int ep)
 143 {
 144     return s->endp_table[ep - 1].type == USBDEVFS_URB_TYPE_ISO;
 145 }
 146
 147 static int is_halted(USBHostDevice *s, int ep)
 148 {
 149     return s->endp_table[ep - 1].halted;
 150 }
 151
 152 static void clear_halt(USBHostDevice *s, int ep)
 153 {
 154     s->endp_table[ep - 1].halted = 0;
 155 }
 156
 157 static void set_halt(USBHostDevice *s, int ep)
 158 {
 159     s->endp_table[ep - 1].halted = 1;
 160 }
 161
 162 static USBHostDevice *hostdev_list;
 163
 164 static void hostdev_link(USBHostDevice *dev)
 165 {
 166     dev->next = hostdev_list;
 167     hostdev_list = dev;
 168 }
 169
 170 static void hostdev_unlink(USBHostDevice *dev)
 171 {
 172     USBHostDevice *pdev = hostdev_list;
 173     USBHostDevice **prev = &hostdev_list;
 174
 175     while (pdev) {
 176         if (pdev == dev) {
 177             *prev = dev->next;
 178             return;
 179         }
 180
 181         prev = &pdev->next;
 182         pdev = pdev->next;
 183     }
 184 }
 185
 186 static USBHostDevice *hostdev_find(int bus_num, int addr)
 187 {
 188     USBHostDevice *s = hostdev_list;
 189     while (s) {
 190         if (s->bus_num == bus_num && s->addr == addr)
 191             return s;
 192         s = s->next;
 193     }
 194     return NULL;
 195 }
 196
 197 /*
 198  * Async URB state.
 199  * We always allocate one isoc descriptor even for bulk transfers
 200  * to simplify allocation and casts.
 201  */
 202 typedef struct AsyncURB
 203 {
 204     struct usbdevfs_urb urb;
 205     struct usbdevfs_iso_packet_desc isocpd;
 206
 207     USBPacket     *packet;
 208     USBHostDevice *hdev;
 209 } AsyncURB;
 210
 211 static AsyncURB *async_alloc(void)
 212 {
 213     return (AsyncURB *) qemu_mallocz(sizeof(AsyncURB));
 214 }
 215
 216 static void async_free(AsyncURB *aurb)
 217 {
 218     qemu_free(aurb);
 219 }
 220
 221 static void async_complete_ctrl(USBHostDevice *s, USBPacket *p)
 222 {
 223     switch(s->ctrl.state) {
 224     case CTRL_STATE_SETUP:
 225         if (p->len < s->ctrl.len)
 226             s->ctrl.len = p->len;
 227         s->ctrl.state = CTRL_STATE_DATA;
 228         p->len = 8;
 229         break;
 230
 231     case CTRL_STATE_ACK:
 232         s->ctrl.state = CTRL_STATE_IDLE;
 233         p->len = 0;
 234         break;
 235
 236     default:
 237         break;
 238     }
 239 }
 240
 241 static void async_complete(void *opaque)
 242 {
 243     USBHostDevice *s = opaque;
 244     AsyncURB *aurb;
 245
 246     while (1) {
 247         USBPacket *p;
 248
 249         int r = ioctl(s->fd, USBDEVFS_REAPURBNDELAY, &aurb);
 250         if (r < 0) {
 251             if (errno == EAGAIN)
 252                 return;
 253
 254             if (errno == ENODEV && !s->closing) {
 255                 printf("husb: device %d.%d disconnected\n", s->bus_num, s->addr);
 256                 usb_device_del_addr(0, s->dev.addr);
 257                 return;
 258             }
 259
 260             dprintf("husb: async. reap urb failed errno %d\n", errno);
 261             return;
 262         }
 263
 264         p = aurb->packet;
 265
 266         dprintf("husb: async completed. aurb %p status %d alen %d\n",
 267                 aurb, aurb->urb.status, aurb->urb.actual_length);
 268
 269         if (p) {
 270             switch (aurb->urb.status) {
 271             case 0:
 272                 p->len = aurb->urb.actual_length;
 273                 if (aurb->urb.type == USBDEVFS_URB_TYPE_CONTROL)
 274                     async_complete_ctrl(s, p);
 275                 break;
 276
 277             case -EPIPE:
 278                 set_halt(s, p->devep);
 279                 /* fall through */
 280             default:
 281                 p->len = USB_RET_NAK;
 282                 break;
 283             }
 284
 285             usb_packet_complete(p);
 286         }
 287
 288         async_free(aurb);
 289     }
 290 }
 291
 292 static void async_cancel(USBPacket *unused, void *opaque)
 293 {
 294     AsyncURB *aurb = opaque;
 295     USBHostDevice *s = aurb->hdev;
 296
 297     dprintf("husb: async cancel. aurb %p\n", aurb);
 298
 299     /* Mark it as dead (see async_complete above) */
 300     aurb->packet = NULL;
 301
 302     int r = ioctl(s->fd, USBDEVFS_DISCARDURB, aurb);
 303     if (r < 0) {
 304         dprintf("husb: async. discard urb failed errno %d\n", errno);
 305     }
 306 }
 307
 308 static int usb_host_claim_interfaces(USBHostDevice *dev, int configuration)
 309 {
 310     int dev_descr_len, config_descr_len;
 311     int interface, nb_interfaces, nb_configurations;
 312     int ret, i;
 313
 314     if (configuration == 0) /* address state - ignore */
 315         return 1;
 316
 317     dprintf("husb: claiming interfaces. config %d\n", configuration);
 318
 319     i = 0;
 320     dev_descr_len = dev->descr[0];
 321     if (dev_descr_len > dev->descr_len)
 322         goto fail;
 323     nb_configurations = dev->descr[17];
 324
 325     i += dev_descr_len;
 326     while (i < dev->descr_len) {
 327         dprintf("husb: i is %d, descr_len is %d, dl %d, dt %d\n", i, dev->descr_len,
 328                dev->descr[i], dev->descr[i+1]);
 329
 330         if (dev->descr[i+1] != USB_DT_CONFIG) {
 331             i += dev->descr[i];
 332             continue;
 333         }
 334         config_descr_len = dev->descr[i];
 335
 336         printf("husb: config #%d need %d\n", dev->descr[i + 5], configuration);
 337
 338         if (configuration < 0 || configuration == dev->descr[i + 5]) {
 339             configuration = dev->descr[i + 5];
 340             break;
 341         }
 342
 343         i += config_descr_len;
 344     }
 345
 346     if (i >= dev->descr_len) {
 347         fprintf(stderr, "husb: update iface failed. no matching configuration\n");
 348         goto fail;
 349     }
 350     nb_interfaces = dev->descr[i + 4];
 351
 352 #ifdef USBDEVFS_DISCONNECT
 353     /* earlier Linux 2.4 do not support that */
 354     {
 355         struct usbdevfs_ioctl ctrl;
 356         for (interface = 0; interface < nb_interfaces; interface++) {
 357             ctrl.ioctl_code = USBDEVFS_DISCONNECT;
 358             ctrl.ifno = interface;
 359             ret = ioctl(dev->fd, USBDEVFS_IOCTL, &ctrl);
 360             if (ret < 0 && errno != ENODATA) {
 361                 perror("USBDEVFS_DISCONNECT");
 362                 goto fail;
 363             }
 364         }
 365     }
 366 #endif
 367
 368     /* XXX: only grab if all interfaces are free */
 369     for (interface = 0; interface < nb_interfaces; interface++) {
 370         ret = ioctl(dev->fd, USBDEVFS_CLAIMINTERFACE, &interface);
 371         if (ret < 0) {
 372             if (errno == EBUSY) {
 373                 printf("husb: update iface. device already grabbed\n");
 374             } else {
 375                 perror("husb: failed to claim interface");
 376             }
 377         fail:
 378             return 0;
 379         }
 380     }
 381
 382     printf("husb: %d interfaces claimed for configuration %d\n",
 383            nb_interfaces, configuration);
 384
 385     dev->ninterfaces   = nb_interfaces;
 386     dev->configuration = configuration;
 387     return 1;
 388 }
 389
 390 static int usb_host_release_interfaces(USBHostDevice *s)
 391 {
 392     int ret, i;
 393
 394     dprintf("husb: releasing interfaces\n");
 395
 396     for (i = 0; i < s->ninterfaces; i++) {
 397         ret = ioctl(s->fd, USBDEVFS_RELEASEINTERFACE, &i);
 398         if (ret < 0) {
 399             perror("husb: failed to release interface");
 400             return 0;
 401         }
 402     }
 403
 404     return 1;
 405 }
 406
 407 static void usb_host_handle_reset(USBDevice *dev)
 408 {
 409     USBHostDevice *s = (USBHostDevice *) dev;
 410
 411     dprintf("husb: reset device %u.%u\n", s->bus_num, s->addr);
 412
 413     ioctl(s->fd, USBDEVFS_RESET);
 414
 415     usb_host_claim_interfaces(s, s->configuration);
 416 }
 417
 418 static void usb_host_handle_destroy(USBDevice *dev)
 419 {
 420     USBHostDevice *s = (USBHostDevice *)dev;
 421
 422     s->closing = 1;
 423
 424     qemu_set_fd_handler(s->fd, NULL, NULL, NULL);
 425
 426     hostdev_unlink(s);
 427
 428     async_complete(s);
 429
 430     if (s->fd >= 0)
 431         close(s->fd);
 432
 433     qemu_free(s);
 434 }
 435
 436 static int usb_linux_update_endp_table(USBHostDevice *s);
 437
 438 static int usb_host_handle_data(USBHostDevice *s, USBPacket *p)
 439 {
 440     struct usbdevfs_urb *urb;
 441     AsyncURB *aurb;
 442     int ret;
 443
 444     aurb = async_alloc();
 445     if (!aurb) {
 446         dprintf("husb: async malloc failed\n");
 447         return USB_RET_NAK;
 448     }
 449     aurb->hdev   = s;
 450     aurb->packet = p;
 451
 452     urb = &aurb->urb;
 453
 454     if (p->pid == USB_TOKEN_IN)
 455         urb->endpoint = p->devep | 0x80;
 456     else
 457         urb->endpoint = p->devep;
 458
 459     if (is_halted(s, p->devep)) {
 460         ret = ioctl(s->fd, USBDEVFS_CLEAR_HALT, &urb->endpoint);
 461         if (ret < 0) {
 462             dprintf("husb: failed to clear halt. ep 0x%x errno %d\n",
 463                    urb->endpoint, errno);
 464             return USB_RET_NAK;
 465         }
 466         clear_halt(s, p->devep);
 467     }
 468
 469     urb->buffer        = p->data;
 470     urb->buffer_length = p->len;
 471
 472     if (is_isoc(s, p->devep)) {
 473         /* Setup ISOC transfer */
 474         urb->type     = USBDEVFS_URB_TYPE_ISO;
 475         urb->flags    = USBDEVFS_URB_ISO_ASAP;
 476         urb->number_of_packets = 1;
 477         urb->iso_frame_desc[0].length = p->len;
 478     } else {
 479         /* Setup bulk transfer */
 480         urb->type     = USBDEVFS_URB_TYPE_BULK;
 481     }
 482
 483     urb->usercontext = s;
 484
 485     ret = ioctl(s->fd, USBDEVFS_SUBMITURB, urb);
 486
 487     dprintf("husb: data submit. ep 0x%x len %u aurb %p\n", urb->endpoint, p->len, aurb);
 488
 489     if (ret < 0) {
 490         dprintf("husb: submit failed. errno %d\n", errno);
 491         async_free(aurb);
 492
 493         switch(errno) {
 494         case ETIMEDOUT:
 495             return USB_RET_NAK;
 496         case EPIPE:
 497         default:
 498             return USB_RET_STALL;
 499         }
 500     }
 501
 502     usb_defer_packet(p, async_cancel, aurb);
 503     return USB_RET_ASYNC;
 504 }
 505
 506 static int ctrl_error(void)
 507 {
 508     if (errno == ETIMEDOUT)
 509         return USB_RET_NAK;
 510     else
 511         return USB_RET_STALL;
 512 }
 513
 514 static int usb_host_set_address(USBHostDevice *s, int addr)
 515 {
 516     dprintf("husb: ctrl set addr %u\n", addr);
 517     s->dev.addr = addr;
 518     return 0;
 519 }
 520
 521 static int usb_host_set_config(USBHostDevice *s, int config)
 522 {
 523     usb_host_release_interfaces(s);
 524
 525     int ret = ioctl(s->fd, USBDEVFS_SETCONFIGURATION, &config);
 526
 527     dprintf("husb: ctrl set config %d ret %d errno %d\n", config, ret, errno);
 528
 529     if (ret < 0)
 530         return ctrl_error();
 531
 532     usb_host_claim_interfaces(s, config);
 533     return 0;
 534 }
 535
 536 static int usb_host_set_interface(USBHostDevice *s, int iface, int alt)
 537 {
 538     struct usbdevfs_setinterface si;
 539     int ret;
 540
 541     si.interface  = iface;
 542     si.altsetting = alt;
 543     ret = ioctl(s->fd, USBDEVFS_SETINTERFACE, &si);
 544
 545     dprintf("husb: ctrl set iface %d altset %d ret %d errno %d\n",
 546         iface, alt, ret, errno);
 547
 548     if (ret < 0)
 549         return ctrl_error();
 550
 551     usb_linux_update_endp_table(s);
 552     return 0;
 553 }
 554
 555 static int usb_host_handle_control(USBHostDevice *s, USBPacket *p)
 556 {
 557     struct usbdevfs_urb *urb;
 558     AsyncURB *aurb;
 559     int ret, value, index;
 560
 561     /*
 562      * Process certain standard device requests.
 563      * These are infrequent and are processed synchronously.
 564      */
 565     value = le16_to_cpu(s->ctrl.req.wValue);
 566     index = le16_to_cpu(s->ctrl.req.wIndex);
 567
 568     dprintf("husb: ctrl type 0x%x req 0x%x val 0x%x index %u len %u\n",
 569         s->ctrl.req.bRequestType, s->ctrl.req.bRequest, value, index,
 570         s->ctrl.len);
 571
 572     if (s->ctrl.req.bRequestType == 0) {
 573         switch (s->ctrl.req.bRequest) {
 574         case USB_REQ_SET_ADDRESS:
 575             return usb_host_set_address(s, value);
 576
 577         case USB_REQ_SET_CONFIGURATION:
 578             return usb_host_set_config(s, value & 0xff);
 579         }
 580     }
 581
 582     if (s->ctrl.req.bRequestType == 1 &&
 583                   s->ctrl.req.bRequest == USB_REQ_SET_INTERFACE)
 584         return usb_host_set_interface(s, index, value);
 585
 586     /* The rest are asynchronous */
 587
 588     aurb = async_alloc();
 589     if (!aurb) {
 590         dprintf("husb: async malloc failed\n");
 591         return USB_RET_NAK;
 592     }
 593     aurb->hdev   = s;
 594     aurb->packet = p;
 595
 596     /*
 597      * Setup ctrl transfer.
 598      *
 599      * s->ctrl is layed out such that data buffer immediately follows
 600      * 'req' struct which is exactly what usbdevfs expects.
 601      */
 602     urb = &aurb->urb;
 603
 604     urb->type     = USBDEVFS_URB_TYPE_CONTROL;
 605     urb->endpoint = p->devep;
 606
 607     urb->buffer        = &s->ctrl.req;
 608     urb->buffer_length = 8 + s->ctrl.len;
 609
 610     urb->usercontext = s;
 611
 612     ret = ioctl(s->fd, USBDEVFS_SUBMITURB, urb);
 613
 614     dprintf("husb: submit ctrl. len %u aurb %p\n", urb->buffer_length, aurb);
 615
 616     if (ret < 0) {
 617         dprintf("husb: submit failed. errno %d\n", errno);
 618         async_free(aurb);
 619
 620         switch(errno) {
 621         case ETIMEDOUT:
 622             return USB_RET_NAK;
 623         case EPIPE:
 624         default:
 625             return USB_RET_STALL;
 626         }
 627     }
 628
 629     usb_defer_packet(p, async_cancel, aurb);
 630     return USB_RET_ASYNC;
 631 }
 632
 633 static int do_token_setup(USBDevice *dev, USBPacket *p)
 634 {
 635     USBHostDevice *s = (USBHostDevice *) dev;
 636     int ret = 0;
 637
 638     if (p->len != 8)
 639         return USB_RET_STALL;
 640
 641     memcpy(&s->ctrl.req, p->data, 8);
 642     s->ctrl.len    = le16_to_cpu(s->ctrl.req.wLength);
 643     s->ctrl.offset = 0;
 644     s->ctrl.state  = CTRL_STATE_SETUP;
 645
 646     if (s->ctrl.req.bRequestType & USB_DIR_IN) {
 647         ret = usb_host_handle_control(s, p);
 648         if (ret < 0)
 649             return ret;
 650
 651         if (ret < s->ctrl.len)
 652             s->ctrl.len = ret;
 653         s->ctrl.state = CTRL_STATE_DATA;
 654     } else {
 655         if (s->ctrl.len == 0)
 656             s->ctrl.state = CTRL_STATE_ACK;
 657         else
 658             s->ctrl.state = CTRL_STATE_DATA;
 659     }
 660
 661     return ret;
 662 }
 663
 664 static int do_token_in(USBDevice *dev, USBPacket *p)
 665 {
 666     USBHostDevice *s = (USBHostDevice *) dev;
 667     int ret = 0;
 668
 669     if (p->devep != 0)
 670         return usb_host_handle_data(s, p);
 671
 672     switch(s->ctrl.state) {
 673     case CTRL_STATE_ACK:
 674         if (!(s->ctrl.req.bRequestType & USB_DIR_IN)) {
 675             ret = usb_host_handle_control(s, p);
 676             if (ret == USB_RET_ASYNC)
 677                 return USB_RET_ASYNC;
 678
 679             s->ctrl.state = CTRL_STATE_IDLE;
 680             return ret > 0 ? 0 : ret;
 681         }
 682
 683         return 0;
 684
 685     case CTRL_STATE_DATA:
 686         if (s->ctrl.req.bRequestType & USB_DIR_IN) {
 687             int len = s->ctrl.len - s->ctrl.offset;
 688             if (len > p->len)
 689                 len = p->len;
 690             memcpy(p->data, s->ctrl.buffer + s->ctrl.offset, len);
 691             s->ctrl.offset += len;
 692             if (s->ctrl.offset >= s->ctrl.len)
 693                 s->ctrl.state = CTRL_STATE_ACK;
 694             return len;
 695         }
 696
 697         s->ctrl.state = CTRL_STATE_IDLE;
 698         return USB_RET_STALL;
 699
 700     default:
 701         return USB_RET_STALL;
 702     }
 703 }
 704
 705 static int do_token_out(USBDevice *dev, USBPacket *p)
 706 {
 707     USBHostDevice *s = (USBHostDevice *) dev;
 708
 709     if (p->devep != 0)
 710         return usb_host_handle_data(s, p);
 711
 712     switch(s->ctrl.state) {
 713     case CTRL_STATE_ACK:
 714         if (s->ctrl.req.bRequestType & USB_DIR_IN) {
 715             s->ctrl.state = CTRL_STATE_IDLE;
 716             /* transfer OK */
 717         } else {
 718             /* ignore additional output */
 719         }
 720         return 0;
 721
 722     case CTRL_STATE_DATA:
 723         if (!(s->ctrl.req.bRequestType & USB_DIR_IN)) {
 724             int len = s->ctrl.len - s->ctrl.offset;
 725             if (len > p->len)
 726                 len = p->len;
 727             memcpy(s->ctrl.buffer + s->ctrl.offset, p->data, len);
 728             s->ctrl.offset += len;
 729             if (s->ctrl.offset >= s->ctrl.len)
 730                 s->ctrl.state = CTRL_STATE_ACK;
 731             return len;
 732         }
 733
 734         s->ctrl.state = CTRL_STATE_IDLE;
 735         return USB_RET_STALL;
 736
 737     default:
 738         return USB_RET_STALL;
 739     }
 740 }
 741
 742 /*
 743  * Packet handler.
 744  * Called by the HC (host controller).
 745  *
 746  * Returns length of the transaction or one of the USB_RET_XXX codes.
 747  */
 748 static int usb_host_handle_packet(USBDevice *s, USBPacket *p)
 749 {
 750     switch(p->pid) {
 751     case USB_MSG_ATTACH:
 752         s->state = USB_STATE_ATTACHED;
 753         return 0;
 754
 755     case USB_MSG_DETACH:
 756         s->state = USB_STATE_NOTATTACHED;
 757         return 0;
 758
 759     case USB_MSG_RESET:
 760         s->remote_wakeup = 0;
 761         s->addr = 0;
 762         s->state = USB_STATE_DEFAULT;
 763         s->handle_reset(s);
 764         return 0;
 765     }
 766
 767     /* Rest of the PIDs must match our address */
 768     if (s->state < USB_STATE_DEFAULT || p->devaddr != s->addr)
 769         return USB_RET_NODEV;
 770
 771     switch (p->pid) {
 772     case USB_TOKEN_SETUP:
 773         return do_token_setup(s, p);
 774
 775     case USB_TOKEN_IN:
 776         return do_token_in(s, p);
 777
 778     case USB_TOKEN_OUT:
 779         return do_token_out(s, p);
 780
 781     default:
 782         return USB_RET_STALL;
 783     }
 784 }
 785
 786 /* returns 1 on problem encountered or 0 for success */
 787 static int usb_linux_update_endp_table(USBHostDevice *s)
 788 {
 789     uint8_t *descriptors;
 790     uint8_t devep, type, configuration, alt_interface;
 791     struct usbdevfs_ctrltransfer ct;
 792     int interface, ret, length, i;
 793
 794     ct.bRequestType = USB_DIR_IN;
 795     ct.bRequest = USB_REQ_GET_CONFIGURATION;
 796     ct.wValue = 0;
 797     ct.wIndex = 0;
 798     ct.wLength = 1;
 799     ct.data = &configuration;
 800     ct.timeout = 50;
 801
 802     ret = ioctl(s->fd, USBDEVFS_CONTROL, &ct);
 803     if (ret < 0) {
 804         perror("usb_linux_update_endp_table");
 805         return 1;
 806     }
 807
 808     /* in address state */
 809     if (configuration == 0)
 810         return 1;
 811
 812     /* get the desired configuration, interface, and endpoint descriptors
 813      * from device description */
 814     descriptors = &s->descr[18];
 815     length = s->descr_len - 18;
 816     i = 0;
 817
 818     if (descriptors[i + 1] != USB_DT_CONFIG ||
 819         descriptors[i + 5] != configuration) {
 820         dprintf("invalid descriptor data - configuration\n");
 821         return 1;
 822     }
 823     i += descriptors[i];
 824
 825     while (i < length) {
 826         if (descriptors[i + 1] != USB_DT_INTERFACE ||
 827             (descriptors[i + 1] == USB_DT_INTERFACE &&
 828              descriptors[i + 4] == 0)) {
 829             i += descriptors[i];
 830             continue;
 831         }
 832
 833         interface = descriptors[i + 2];
 834
 835         ct.bRequestType = USB_DIR_IN | USB_RECIP_INTERFACE;
 836         ct.bRequest = USB_REQ_GET_INTERFACE;
 837         ct.wValue = 0;
 838         ct.wIndex = interface;
 839         ct.wLength = 1;
 840         ct.data = &alt_interface;
 841         ct.timeout = 50;
 842
 843         ret = ioctl(s->fd, USBDEVFS_CONTROL, &ct);
 844         if (ret < 0) {
 845             perror("usb_linux_update_endp_table");
 846             return 1;
 847         }
 848
 849         /* the current interface descriptor is the active interface
 850          * and has endpoints */
 851         if (descriptors[i + 3] != alt_interface) {
 852             i += descriptors[i];
 853             continue;
 854         }
 855
 856         /* advance to the endpoints */
 857         while (i < length && descriptors[i +1] != USB_DT_ENDPOINT)
 858             i += descriptors[i];
 859
 860         if (i >= length)
 861             break;
 862
 863         while (i < length) {
 864             if (descriptors[i + 1] != USB_DT_ENDPOINT)
 865                 break;
 866
 867             devep = descriptors[i + 2];
 868             switch (descriptors[i + 3] & 0x3) {
 869             case 0x00:
 870                 type = USBDEVFS_URB_TYPE_CONTROL;
 871                 break;
 872             case 0x01:
 873                 type = USBDEVFS_URB_TYPE_ISO;
 874                 break;
 875             case 0x02:
 876                 type = USBDEVFS_URB_TYPE_BULK;
 877                 break;
 878             case 0x03:
 879                 type = USBDEVFS_URB_TYPE_INTERRUPT;
 880                 break;
 881             default:
 882                 dprintf("usb_host: malformed endpoint type\n");
 883                 type = USBDEVFS_URB_TYPE_BULK;
 884             }
 885             s->endp_table[(devep & 0xf) - 1].type = type;
 886             s->endp_table[(devep & 0xf) - 1].halted = 0;
 887
 888             i += descriptors[i];
 889         }
 890     }
 891     return 0;
 892 }
 893
 894 static USBDevice *usb_host_device_open_addr(int bus_num, int addr, const char *prod_name)
 895 {
 896     int fd = -1, ret;
 897     USBHostDevice *dev = NULL;
 898     struct usbdevfs_connectinfo ci;
 899     char buf[1024];
 900
 901     dev = qemu_mallocz(sizeof(USBHostDevice));
 902     if (!dev)
 903         goto fail;
 904
 905     dev->bus_num = bus_num;
 906     dev->addr = addr;
 907
 908     printf("husb: open device %d.%d\n", bus_num, addr);
 909
 910     if (!usb_host_device_path) {
 911         perror("husb: USB Host Device Path not set");
 912         goto fail;
 913     }
 914     snprintf(buf, sizeof(buf), "%s/%03d/%03d", usb_host_device_path,
 915              bus_num, addr);
 916     fd = open(buf, O_RDWR | O_NONBLOCK);
 917     if (fd < 0) {
 918         perror(buf);
 919         goto fail;
 920     }
 921     dprintf("husb: opened %s\n", buf);
 922
 923     /* read the device description */
 924     dev->descr_len = read(fd, dev->descr, sizeof(dev->descr));
 925     if (dev->descr_len <= 0) {
 926         perror("husb: reading device data failed");
 927         goto fail;
 928     }
 929
 930 #ifdef DEBUG
 931     {
 932         int x;
 933         printf("=== begin dumping device descriptor data ===\n");
 934         for (x = 0; x < dev->descr_len; x++)
 935             printf("%02x ", dev->descr[x]);
 936         printf("\n=== end dumping device descriptor data ===\n");
 937     }
 938 #endif
 939
 940     dev->fd = fd;
 941
 942     /*
 943      * Initial configuration is -1 which makes us claim first
 944      * available config. We used to start with 1, which does not
 945      * always work. I've seen devices where first config starts
 946      * with 2.
 947      */
 948     if (!usb_host_claim_interfaces(dev, -1))
 949         goto fail;
 950
 951     ret = ioctl(fd, USBDEVFS_CONNECTINFO, &ci);
 952     if (ret < 0) {
 953         perror("usb_host_device_open: USBDEVFS_CONNECTINFO");
 954         goto fail;
 955     }
 956
 957     printf("husb: grabbed usb device %d.%d\n", bus_num, addr);
 958
 959     ret = usb_linux_update_endp_table(dev);
 960     if (ret)
 961         goto fail;
 962
 963     if (ci.slow)
 964         dev->dev.speed = USB_SPEED_LOW;
 965     else
 966         dev->dev.speed = USB_SPEED_HIGH;
 967
 968     dev->dev.handle_packet  = usb_host_handle_packet;
 969     dev->dev.handle_reset   = usb_host_handle_reset;
 970     dev->dev.handle_destroy = usb_host_handle_destroy;
 971
 972     if (!prod_name || prod_name[0] == '\0')
 973         snprintf(dev->dev.devname, sizeof(dev->dev.devname),
 974                  "host:%d.%d", bus_num, addr);
 975     else
 976         pstrcpy(dev->dev.devname, sizeof(dev->dev.devname),
 977                 prod_name);
 978
 979     /* USB devio uses 'write' flag to check for async completions */
 980     qemu_set_fd_handler(dev->fd, NULL, async_complete, dev);
 981
 982     hostdev_link(dev);
 983
 984     return (USBDevice *) dev;
 985
 986 fail:
 987     if (dev)
 988         qemu_free(dev);
 989
 990     close(fd);
 991     return NULL;
 992 }
 993
 994 static int usb_host_auto_add(const char *spec);
 995 static int usb_host_auto_del(const char *spec);
 996
 997 USBDevice *usb_host_device_open(const char *devname)
 998 {
 999     int bus_num, addr;
1000     char product_name[PRODUCT_NAME_SZ];
1001
1002     if (strstr(devname, "auto:")) {
1003         usb_host_auto_add(devname);
1004         return NULL;
1005     }
1006
1007     if (usb_host_find_device(&bus_num, &addr, product_name, sizeof(product_name),
1008                              devname) < 0)
1009         return NULL;
1010
1011     if (hostdev_find(bus_num, addr)) {
1012        term_printf("husb: host usb device %d.%d is already open\n", bus_num, addr);
1013        return NULL;
1014     }
1015
1016     return usb_host_device_open_addr(bus_num, addr, product_name);
1017 }
1018
1019 int usb_host_device_close(const char *devname)
1020 {
1021     char product_name[PRODUCT_NAME_SZ];
1022     int bus_num, addr;
1023     USBHostDevice *s;
1024
1025     if (strstr(devname, "auto:"))
1026         return usb_host_auto_del(devname);
1027
1028     if (usb_host_find_device(&bus_num, &addr, product_name, sizeof(product_name),
1029                              devname) < 0)
1030         return -1;
1031
1032     s = hostdev_find(bus_num, addr);
1033     if (s) {
1034         usb_device_del_addr(0, s->dev.addr);
1035         return 0;
1036     }
1037
1038     return -1;
1039 }
1040
1041 static int get_tag_value(char *buf, int buf_size,
1042                          const char *str, const char *tag,
1043                          const char *stopchars)
1044 {
1045     const char *p;
1046     char *q;
1047     p = strstr(str, tag);
1048     if (!p)
1049         return -1;
1050     p += strlen(tag);
1051     while (isspace(*p))
1052         p++;
1053     q = buf;
1054     while (*p != '\0' && !strchr(stopchars, *p)) {
1055         if ((q - buf) < (buf_size - 1))
1056             *q++ = *p;
1057         p++;
1058     }
1059     *q = '\0';
1060     return q - buf;
1061 }
1062
1063 /*
1064  * Use /proc/bus/usb/devices or /dev/bus/usb/devices file to determine
1065  * host's USB devices. This is legacy support since many distributions
1066  * are moving to /sys/bus/usb
1067  */
1068 static int usb_host_scan_dev(void *opaque, USBScanFunc *func)
1069 {
1070     FILE *f = 0;
1071     char line[1024];
1072     char buf[1024];
1073     int bus_num, addr, speed, device_count, class_id, product_id, vendor_id;
1074     char product_name[512];
1075     int ret = 0;
1076
1077     if (!usb_host_device_path) {
1078         perror("husb: USB Host Device Path not set");
1079         goto the_end;
1080     }
1081     snprintf(line, sizeof(line), "%s/devices", usb_host_device_path);
1082     f = fopen(line, "r");
1083     if (!f) {
1084         perror("husb: cannot open devices file");
1085         goto the_end;
1086     }
1087
1088     device_count = 0;
1089     bus_num = addr = speed = class_id = product_id = vendor_id = 0;
1090     for(;;) {
1091         if (fgets(line, sizeof(line), f) == NULL)
1092             break;
1093         if (strlen(line) > 0)
1094             line[strlen(line) - 1] = '\0';
1095         if (line[0] == 'T' && line[1] == ':') {
1096             if (device_count && (vendor_id || product_id)) {
1097                 /* New device.  Add the previously discovered device.  */
1098                 ret = func(opaque, bus_num, addr, class_id, vendor_id,
1099                            product_id, product_name, speed);
1100                 if (ret)
1101                     goto the_end;
1102             }
1103             if (get_tag_value(buf, sizeof(buf), line, "Bus=", " ") < 0)
1104                 goto fail;
1105             bus_num = atoi(buf);
1106             if (get_tag_value(buf, sizeof(buf), line, "Dev#=", " ") < 0)
1107                 goto fail;
1108             addr = atoi(buf);
1109             if (get_tag_value(buf, sizeof(buf), line, "Spd=", " ") < 0)
1110                 goto fail;
1111             if (!strcmp(buf, "480"))
1112                 speed = USB_SPEED_HIGH;
1113             else if (!strcmp(buf, "1.5"))
1114                 speed = USB_SPEED_LOW;
1115             else
1116                 speed = USB_SPEED_FULL;
1117             product_name[0] = '\0';
1118             class_id = 0xff;
1119             device_count++;
1120             product_id = 0;
1121             vendor_id = 0;
1122         } else if (line[0] == 'P' && line[1] == ':') {
1123             if (get_tag_value(buf, sizeof(buf), line, "Vendor=", " ") < 0)
1124                 goto fail;
1125             vendor_id = strtoul(buf, NULL, 16);
1126             if (get_tag_value(buf, sizeof(buf), line, "ProdID=", " ") < 0)
1127                 goto fail;
1128             product_id = strtoul(buf, NULL, 16);
1129         } else if (line[0] == 'S' && line[1] == ':') {
1130             if (get_tag_value(buf, sizeof(buf), line, "Product=", "") < 0)
1131                 goto fail;
1132             pstrcpy(product_name, sizeof(product_name), buf);
1133         } else if (line[0] == 'D' && line[1] == ':') {
1134             if (get_tag_value(buf, sizeof(buf), line, "Cls=", " (") < 0)
1135                 goto fail;
1136             class_id = strtoul(buf, NULL, 16);
1137         }
1138     fail: ;
1139     }
1140     if (device_count && (vendor_id || product_id)) {
1141         /* Add the last device.  */
1142         ret = func(opaque, bus_num, addr, class_id, vendor_id,
1143                    product_id, product_name, speed);
1144     }
1145  the_end:
1146     if (f)
1147         fclose(f);
1148     return ret;
1149 }
1150
1151 /*
1152  * Read sys file-system device file
1153  *
1154  * @line address of buffer to put file contents in
1155  * @line_size size of line
1156  * @device_file path to device file (printf format string)
1157  * @device_name device being opened (inserted into device_file)
1158  *
1159  * @return 0 failed, 1 succeeded ('line' contains data)
1160  */
1161 static int usb_host_read_file(char *line, size_t line_size, const char *device_file, const char *device_name)
1162 {
1163     FILE *f;
1164     int ret = 0;
1165     char filename[PATH_MAX];
1166
1167     snprintf(filename, PATH_MAX, device_file, device_name);
1168     f = fopen(filename, "r");
1169     if (f) {
1170         fgets(line, line_size, f);
1171         fclose(f);
1172         ret = 1;
1173     } else {
1174         term_printf("husb: could not open %s\n", filename);
1175     }
1176
1177     return ret;
1178 }
1179
1180 /*
1181  * Use /sys/bus/usb/devices/ directory to determine host's USB
1182  * devices.
1183  *
1184  * This code is based on Robert Schiele's original patches posted to
1185  * the Novell bug-tracker https://bugzilla.novell.com/show_bug.cgi?id=241950
1186  */
1187 static int usb_host_scan_sys(void *opaque, USBScanFunc *func)
1188 {
1189     DIR *dir = 0;
1190     char line[1024];
1191     int bus_num, addr, speed, class_id, product_id, vendor_id;
1192     int ret = 0;
1193     char product_name[512];
1194     struct dirent *de;
1195
1196     dir = opendir(USBSYSBUS_PATH "/devices");
1197     if (!dir) {
1198         perror("husb: cannot open devices directory");
1199         goto the_end;
1200     }
1201
1202     while ((de = readdir(dir))) {
1203         if (de->d_name[0] != '.' && !strchr(de->d_name, ':')) {
1204             char *tmpstr = de->d_name;
1205             if (!strncmp(de->d_name, "usb", 3))
1206                 tmpstr += 3;
1207             bus_num = atoi(tmpstr);
1208
1209             if (!usb_host_read_file(line, sizeof(line), USBSYSBUS_PATH "/devices/%s/devnum", de->d_name))
1210                 goto the_end;
1211             if (sscanf(line, "%d", &addr) != 1)
1212                 goto the_end;
1213
1214             if (!usb_host_read_file(line, sizeof(line), USBSYSBUS_PATH "/devices/%s/bDeviceClass", de->d_name))
1215                 goto the_end;
1216             if (sscanf(line, "%x", &class_id) != 1)
1217                 goto the_end;
1218
1219             if (!usb_host_read_file(line, sizeof(line), USBSYSBUS_PATH "/devices/%s/idVendor", de->d_name))
1220                 goto the_end;
1221             if (sscanf(line, "%x", &vendor_id) != 1)
1222                 goto the_end;
1223
1224             if (!usb_host_read_file(line, sizeof(line), USBSYSBUS_PATH "/devices/%s/idProduct", de->d_name))
1225                 goto the_end;
1226             if (sscanf(line, "%x", &product_id) != 1)
1227                 goto the_end;
1228
1229             if (!usb_host_read_file(line, sizeof(line), USBSYSBUS_PATH "/devices/%s/product", de->d_name)) {
1230                 *product_name = 0;
1231             } else {
1232                 if (strlen(line) > 0)
1233                     line[strlen(line) - 1] = '\0';
1234                 pstrcpy(product_name, sizeof(product_name), line);
1235             }
1236
1237             if (!usb_host_read_file(line, sizeof(line), USBSYSBUS_PATH "/devices/%s/speed", de->d_name))
1238                 goto the_end;
1239             if (!strcmp(line, "480\n"))
1240                 speed = USB_SPEED_HIGH;
1241             else if (!strcmp(line, "1.5\n"))
1242                 speed = USB_SPEED_LOW;
1243             else
1244                 speed = USB_SPEED_FULL;
1245
1246             ret = func(opaque, bus_num, addr, class_id, vendor_id,
1247                        product_id, product_name, speed);
1248             if (ret)
1249                 goto the_end;
1250         }
1251     }
1252  the_end:
1253     if (dir)
1254         closedir(dir);
1255     return ret;
1256 }
1257
1258 /*
1259  * Determine how to access the host's USB devices and call the
1260  * specific support function.
1261  */
1262 static int usb_host_scan(void *opaque, USBScanFunc *func)
1263 {
1264     FILE *f = 0;
1265     DIR *dir = 0;
1266     int ret = 0;
1267     const char *fs_type[] = {"unknown", "proc", "dev", "sys"};
1268     char devpath[PATH_MAX];
1269
1270     /* only check the host once */
1271     if (!usb_fs_type) {
1272         f = fopen(USBPROCBUS_PATH "/devices", "r");
1273         if (f) {
1274             /* devices found in /proc/bus/usb/ */
1275             strcpy(devpath, USBPROCBUS_PATH);
1276             usb_fs_type = USB_FS_PROC;
1277             fclose(f);
1278             dprintf(USBDBG_DEVOPENED, USBPROCBUS_PATH);
1279             goto found_devices;
1280         }
1281         /* try additional methods if an access method hasn't been found yet */
1282         f = fopen(USBDEVBUS_PATH "/devices", "r");
1283         if (f) {
1284             /* devices found in /dev/bus/usb/ */
1285             strcpy(devpath, USBDEVBUS_PATH);
1286             usb_fs_type = USB_FS_DEV;
1287             fclose(f);
1288             dprintf(USBDBG_DEVOPENED, USBDEVBUS_PATH);
1289             goto found_devices;
1290         }
1291         dir = opendir(USBSYSBUS_PATH "/devices");
1292         if (dir) {
1293             /* devices found in /dev/bus/usb/ (yes - not a mistake!) */
1294             strcpy(devpath, USBDEVBUS_PATH);
1295             usb_fs_type = USB_FS_SYS;
1296             closedir(dir);
1297             dprintf(USBDBG_DEVOPENED, USBSYSBUS_PATH);
1298             goto found_devices;
1299         }
1300     found_devices:
1301         if (!usb_fs_type) {
1302             term_printf("husb: unable to access USB devices\n");
1303             return -ENOENT;
1304         }
1305
1306         /* the module setting (used later for opening devices) */
1307         usb_host_device_path = qemu_mallocz(strlen(devpath)+1);
1308         if (usb_host_device_path) {
1309             strcpy(usb_host_device_path, devpath);
1310             term_printf("husb: using %s file-system with %s\n", fs_type[usb_fs_type], usb_host_device_path);
1311         } else {
1312             /* out of memory? */
1313             perror("husb: unable to allocate memory for device path");
1314             return -ENOMEM;
1315         }
1316     }
1317
1318     switch (usb_fs_type) {
1319     case USB_FS_PROC:
1320     case USB_FS_DEV:
1321         ret = usb_host_scan_dev(opaque, func);
1322         break;
1323     case USB_FS_SYS:
1324         ret = usb_host_scan_sys(opaque, func);
1325         break;
1326     default:
1327         ret = -EINVAL;
1328         break;
1329     }
1330     return ret;
1331 }
1332
1333 struct USBAutoFilter {
1334     struct USBAutoFilter *next;
1335     int bus_num;
1336     int addr;
1337     int vendor_id;
1338     int product_id;
1339 };
1340
1341 static QEMUTimer *usb_auto_timer;
1342 static struct USBAutoFilter *usb_auto_filter;
1343
1344 static int usb_host_auto_scan(void *opaque, int bus_num, int addr,
1345                      int class_id, int vendor_id, int product_id,
1346                      const char *product_name, int speed)
1347 {
1348     struct USBAutoFilter *f;
1349     struct USBDevice *dev;
1350
1351     /* Ignore hubs */
1352     if (class_id == 9)
1353         return 0;
1354
1355     for (f = usb_auto_filter; f; f = f->next) {
1356         if (f->bus_num >= 0 && f->bus_num != bus_num)
1357             continue;
1358
1359         if (f->addr >= 0 && f->addr != addr)
1360             continue;
1361
1362         if (f->vendor_id >= 0 && f->vendor_id != vendor_id)
1363             continue;
1364
1365         if (f->product_id >= 0 && f->product_id != product_id)
1366             continue;
1367
1368         /* We got a match */
1369
1370         /* Allredy attached ? */
1371         if (hostdev_find(bus_num, addr))
1372             return 0;
1373
1374         dprintf("husb: auto open: bus_num %d addr %d\n", bus_num, addr);
1375
1376         dev = usb_host_device_open_addr(bus_num, addr, product_name);
1377         if (dev)
1378             usb_device_add_dev(dev);
1379     }
1380
1381     return 0;
1382 }
1383
1384 static void usb_host_auto_timer(void *unused)
1385 {
1386     usb_host_scan(NULL, usb_host_auto_scan);
1387     qemu_mod_timer(usb_auto_timer, qemu_get_clock(rt_clock) + 2000);
1388 }
1389
1390 /*
1391  * Autoconnect filter
1392  * Format:
1393  *    auto:bus:dev[:vid:pid]
1394  *    auto:bus.dev[:vid:pid]
1395  *
1396  *    bus  - bus number    (dec, * means any)
1397  *    dev  - device number (dec, * means any)
1398  *    vid  - vendor id     (hex, * means any)
1399  *    pid  - product id    (hex, * means any)
1400  *
1401  *    See 'lsusb' output.
1402  */
1403 static int parse_filter(const char *spec, struct USBAutoFilter *f)
1404 {
1405     enum { BUS, DEV, VID, PID, DONE };
1406     const char *p = spec;
1407     int i;
1408
1409     f->bus_num    = -1;
1410     f->addr       = -1;
1411     f->vendor_id  = -1;
1412     f->product_id = -1;
1413
1414     for (i = BUS; i < DONE; i++) {
1415         p = strpbrk(p, ":.");
1416         if (!p) break;
1417         p++;
1418
1419         if (*p == '*')
1420             continue;
1421
1422         switch(i) {
1423         case BUS: f->bus_num = strtol(p, NULL, 10);    break;
1424         case DEV: f->addr    = strtol(p, NULL, 10);    break;
1425         case VID: f->vendor_id  = strtol(p, NULL, 16); break;
1426         case PID: f->product_id = strtol(p, NULL, 16); break;
1427         }
1428     }
1429
1430     if (i < DEV) {
1431         fprintf(stderr, "husb: invalid auto filter spec %s\n", spec);
1432         return -1;
1433     }
1434
1435     return 0;
1436 }
1437
1438 static int match_filter(const struct USBAutoFilter *f1,
1439                         const struct USBAutoFilter *f2)
1440 {
1441     return f1->bus_num    == f2->bus_num &&
1442            f1->addr       == f2->addr &&
1443            f1->vendor_id  == f2->vendor_id &&
1444            f1->product_id == f2->product_id;
1445 }
1446
1447 static int usb_host_auto_add(const char *spec)
1448 {
1449     struct USBAutoFilter filter, *f;
1450
1451     if (parse_filter(spec, &filter) < 0)
1452         return -1;
1453
1454     f = qemu_mallocz(sizeof(*f));
1455     if (!f) {
1456         fprintf(stderr, "husb: failed to allocate auto filter\n");
1457         return -1;
1458     }
1459
1460     *f = filter;
1461
1462     if (!usb_auto_filter) {
1463         /*
1464          * First entry. Init and start the monitor.
1465          * Right now we're using timer to check for new devices.
1466          * If this turns out to be too expensive we can move that into a
1467          * separate thread.
1468          */
1469         usb_auto_timer = qemu_new_timer(rt_clock, usb_host_auto_timer, NULL);
1470         if (!usb_auto_timer) {
1471             fprintf(stderr, "husb: failed to allocate auto scan timer\n");
1472             qemu_free(f);
1473             return -1;
1474         }
1475
1476         /* Check for new devices every two seconds */
1477         qemu_mod_timer(usb_auto_timer, qemu_get_clock(rt_clock) + 2000);
1478     }
1479
1480     dprintf("husb: added auto filter: bus_num %d addr %d vid %d pid %d\n",
1481         f->bus_num, f->addr, f->vendor_id, f->product_id);
1482
1483     f->next = usb_auto_filter;
1484     usb_auto_filter = f;
1485
1486     return 0;
1487 }
1488
1489 static int usb_host_auto_del(const char *spec)
1490 {
1491     struct USBAutoFilter *pf = usb_auto_filter;
1492     struct USBAutoFilter **prev = &usb_auto_filter;
1493     struct USBAutoFilter filter;
1494
1495     if (parse_filter(spec, &filter) < 0)
1496         return -1;
1497
1498     while (pf) {
1499         if (match_filter(pf, &filter)) {
1500             dprintf("husb: removed auto filter: bus_num %d addr %d vid %d pid %d\n",
1501                      pf->bus_num, pf->addr, pf->vendor_id, pf->product_id);
1502
1503             *prev = pf->next;
1504
1505             if (!usb_auto_filter) {
1506                 /* No more filters. Stop scanning. */
1507                 qemu_del_timer(usb_auto_timer);
1508                 qemu_free_timer(usb_auto_timer);
1509             }
1510
1511             return 0;
1512         }
1513
1514         prev = &pf->next;
1515         pf   = pf->next;
1516     }
1517
1518     return -1;
1519 }
1520
1521 typedef struct FindDeviceState {
1522     int vendor_id;
1523     int product_id;
1524     int bus_num;
1525     int addr;
1526     char product_name[PRODUCT_NAME_SZ];
1527 } FindDeviceState;
1528
1529 static int usb_host_find_device_scan(void *opaque, int bus_num, int addr,
1530                                      int class_id,
1531                                      int vendor_id, int product_id,
1532                                      const char *product_name, int speed)
1533 {
1534     FindDeviceState *s = opaque;
1535     if ((vendor_id == s->vendor_id &&
1536         product_id == s->product_id) ||
1537         (bus_num == s->bus_num &&
1538         addr == s->addr)) {
1539         pstrcpy(s->product_name, PRODUCT_NAME_SZ, product_name);
1540         s->bus_num = bus_num;
1541         s->addr = addr;
1542         return 1;
1543     } else {
1544         return 0;
1545     }
1546 }
1547
1548 /* the syntax is :
1549    'bus.addr' (decimal numbers) or
1550    'vendor_id:product_id' (hexa numbers) */
1551 static int usb_host_find_device(int *pbus_num, int *paddr,
1552                                 char *product_name, int product_name_size,
1553                                 const char *devname)
1554 {
1555     const char *p;
1556     int ret;
1557     FindDeviceState fs;
1558
1559     p = strchr(devname, '.');
1560     if (p) {
1561         *pbus_num = strtoul(devname, NULL, 0);
1562         *paddr = strtoul(p + 1, NULL, 0);
1563         fs.bus_num = *pbus_num;
1564         fs.addr = *paddr;
1565         ret = usb_host_scan(&fs, usb_host_find_device_scan);
1566         if (ret)
1567             pstrcpy(product_name, product_name_size, fs.product_name);
1568         return 0;
1569     }
1570
1571     p = strchr(devname, ':');
1572     if (p) {
1573         fs.vendor_id = strtoul(devname, NULL, 16);
1574         fs.product_id = strtoul(p + 1, NULL, 16);
1575         ret = usb_host_scan(&fs, usb_host_find_device_scan);
1576         if (ret) {
1577             *pbus_num = fs.bus_num;
1578             *paddr = fs.addr;
1579             pstrcpy(product_name, product_name_size, fs.product_name);
1580             return 0;
1581         }
1582     }
1583     return -1;
1584 }
1585
1586 /**********************/
1587 /* USB host device info */
1588
1589 struct usb_class_info {
1590     int class;
1591     const char *class_name;
1592 };
1593
1594 static const struct usb_class_info usb_class_info[] = {
1595     { USB_CLASS_AUDIO, "Audio"},
1596     { USB_CLASS_COMM, "Communication"},
1597     { USB_CLASS_HID, "HID"},
1598     { USB_CLASS_HUB, "Hub" },
1599     { USB_CLASS_PHYSICAL, "Physical" },
1600     { USB_CLASS_PRINTER, "Printer" },
1601     { USB_CLASS_MASS_STORAGE, "Storage" },
1602     { USB_CLASS_CDC_DATA, "Data" },
1603     { USB_CLASS_APP_SPEC, "Application Specific" },
1604     { USB_CLASS_VENDOR_SPEC, "Vendor Specific" },
1605     { USB_CLASS_STILL_IMAGE, "Still Image" },
1606     { USB_CLASS_CSCID, "Smart Card" },
1607     { USB_CLASS_CONTENT_SEC, "Content Security" },
1608     { -1, NULL }
1609 };
1610
1611 static const char *usb_class_str(uint8_t class)
1612 {
1613     const struct usb_class_info *p;
1614     for(p = usb_class_info; p->class != -1; p++) {
1615         if (p->class == class)
1616             break;
1617     }
1618     return p->class_name;
1619 }
1620
1621 static void usb_info_device(int bus_num, int addr, int class_id,
1622                             int vendor_id, int product_id,
1623                             const char *product_name,
1624                             int speed)
1625 {
1626     const char *class_str, *speed_str;
1627
1628     switch(speed) {
1629     case USB_SPEED_LOW:
1630         speed_str = "1.5";
1631         break;
1632     case USB_SPEED_FULL:
1633         speed_str = "12";
1634         break;
1635     case USB_SPEED_HIGH:
1636         speed_str = "480";
1637         break;
1638     default:
1639         speed_str = "?";
1640         break;
1641     }
1642
1643     term_printf("  Device %d.%d, speed %s Mb/s\n",
1644                 bus_num, addr, speed_str);
1645     class_str = usb_class_str(class_id);
1646     if (class_str)
1647         term_printf("    %s:", class_str);
1648     else
1649         term_printf("    Class %02x:", class_id);
1650     term_printf(" USB device %04x:%04x", vendor_id, product_id);
1651     if (product_name[0] != '\0')
1652         term_printf(", %s", product_name);
1653     term_printf("\n");
1654 }
1655
1656 static int usb_host_info_device(void *opaque, int bus_num, int addr,
1657                                 int class_id,
1658                                 int vendor_id, int product_id,
1659                                 const char *product_name,
1660                                 int speed)
1661 {
1662     usb_info_device(bus_num, addr, class_id, vendor_id, product_id,
1663                     product_name, speed);
1664     return 0;
1665 }
1666
1667 static void dec2str(int val, char *str, size_t size)
1668 {
1669     if (val == -1)
1670         snprintf(str, size, "*");
1671     else
1672         snprintf(str, size, "%d", val);
1673 }
1674
1675 static void hex2str(int val, char *str, size_t size)
1676 {
1677     if (val == -1)
1678         snprintf(str, size, "*");
1679     else
1680         snprintf(str, size, "%x", val);
1681 }
1682
1683 void usb_host_info(void)
1684 {
1685     struct USBAutoFilter *f;
1686
1687     usb_host_scan(NULL, usb_host_info_device);
1688
1689     if (usb_auto_filter)
1690         term_printf("  Auto filters:\n");
1691     for (f = usb_auto_filter; f; f = f->next) {
1692         char bus[10], addr[10], vid[10], pid[10];
1693         dec2str(f->bus_num, bus, sizeof(bus));
1694         dec2str(f->addr, addr, sizeof(addr));
1695         hex2str(f->vendor_id, vid, sizeof(vid));
1696         hex2str(f->product_id, pid, sizeof(pid));
1697         term_printf("    Device %s.%s ID %s:%s\n", bus, addr, vid, pid);
1698     }
1699 }
1700
1701 #else
1702
1703 #include "hw/usb.h"
1704
1705 void usb_host_info(void)
1706 {
1707     term_printf("USB host devices not supported\n");
1708 }
1709
1710 /* XXX: modify configure to compile the right host driver */
1711 USBDevice *usb_host_device_open(const char *devname)
1712 {
1713     return NULL;
1714 }
1715
1716 int usb_host_device_close(const char *devname)
1717 {
1718     return 0;
1719 }
1720
1721 #endif