File:  [Qemu by Fabrice Bellard] / qemu / usb-linux.c
Revision 1.1.1.13 (vendor branch): download - view: text, annotated - select for diffs
Tue Apr 24 18:56:03 2018 UTC (3 years, 1 month ago) by root
Branches: qemu, MAIN
CVS tags: qemu1000, qemu0151, HEAD
qemu 0.15.1

    1: /*
    2:  * Linux host USB redirector
    3:  *
    4:  * Copyright (c) 2005 Fabrice Bellard
    5:  *
    6:  * Copyright (c) 2008 Max Krasnyansky
    7:  *      Support for host device auto connect & disconnect
    8:  *      Major rewrite to support fully async operation
    9:  *
   10:  * Copyright 2008 TJ <linux@tjworld.net>
   11:  *      Added flexible support for /dev/bus/usb /sys/bus/usb/devices in addition
   12:  *      to the legacy /proc/bus/usb USB device discovery and handling
   13:  *
   14:  * Permission is hereby granted, free of charge, to any person obtaining a copy
   15:  * of this software and associated documentation files (the "Software"), to deal
   16:  * in the Software without restriction, including without limitation the rights
   17:  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
   18:  * copies of the Software, and to permit persons to whom the Software is
   19:  * furnished to do so, subject to the following conditions:
   20:  *
   21:  * The above copyright notice and this permission notice shall be included in
   22:  * all copies or substantial portions of the Software.
   23:  *
   24:  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
   25:  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
   26:  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
   27:  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
   28:  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
   29:  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
   30:  * THE SOFTWARE.
   31:  */
   32: 
   33: #include "qemu-common.h"
   34: #include "qemu-timer.h"
   35: #include "monitor.h"
   36: #include "sysemu.h"
   37: 
   38: #include <dirent.h>
   39: #include <sys/ioctl.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: typedef int USBScanFunc(void *opaque, int bus_num, int addr, char *port,
   57:                         int class_id, int vendor_id, int product_id,
   58:                         const char *product_name, int speed);
   59: 
   60: //#define DEBUG
   61: 
   62: #ifdef DEBUG
   63: #define DPRINTF printf
   64: #else
   65: #define DPRINTF(...)
   66: #endif
   67: 
   68: #define USBDBG_DEVOPENED "husb: opened %s/devices\n"
   69: 
   70: #define USBPROCBUS_PATH "/proc/bus/usb"
   71: #define PRODUCT_NAME_SZ 32
   72: #define MAX_ENDPOINTS 15
   73: #define MAX_PORTLEN 16
   74: #define USBDEVBUS_PATH "/dev/bus/usb"
   75: #define USBSYSBUS_PATH "/sys/bus/usb"
   76: 
   77: static char *usb_host_device_path;
   78: 
   79: #define USB_FS_NONE 0
   80: #define USB_FS_PROC 1
   81: #define USB_FS_DEV 2
   82: #define USB_FS_SYS 3
   83: 
   84: static int usb_fs_type;
   85: 
   86: /* endpoint association data */
   87: #define ISO_FRAME_DESC_PER_URB 32
   88: #define INVALID_EP_TYPE 255
   89: 
   90: /* devio.c limits single requests to 16k */
   91: #define MAX_USBFS_BUFFER_SIZE 16384
   92: 
   93: typedef struct AsyncURB AsyncURB;
   94: 
   95: struct endp_data {
   96:     uint8_t type;
   97:     uint8_t halted;
   98:     uint8_t iso_started;
   99:     AsyncURB *iso_urb;
  100:     int iso_urb_idx;
  101:     int iso_buffer_used;
  102:     int max_packet_size;
  103:     int inflight;
  104: };
  105: 
  106: struct USBAutoFilter {
  107:     uint32_t bus_num;
  108:     uint32_t addr;
  109:     char     *port;
  110:     uint32_t vendor_id;
  111:     uint32_t product_id;
  112: };
  113: 
  114: typedef struct USBHostDevice {
  115:     USBDevice dev;
  116:     int       fd;
  117: 
  118:     uint8_t   descr[8192];
  119:     int       descr_len;
  120:     int       configuration;
  121:     int       ninterfaces;
  122:     int       closing;
  123:     uint32_t  iso_urb_count;
  124:     Notifier  exit;
  125: 
  126:     struct endp_data endp_table[MAX_ENDPOINTS];
  127:     QLIST_HEAD(, AsyncURB) aurbs;
  128: 
  129:     /* Host side address */
  130:     int bus_num;
  131:     int addr;
  132:     char port[MAX_PORTLEN];
  133:     struct USBAutoFilter match;
  134: 
  135:     QTAILQ_ENTRY(USBHostDevice) next;
  136: } USBHostDevice;
  137: 
  138: static QTAILQ_HEAD(, USBHostDevice) hostdevs = QTAILQ_HEAD_INITIALIZER(hostdevs);
  139: 
  140: static int usb_host_close(USBHostDevice *dev);
  141: static int parse_filter(const char *spec, struct USBAutoFilter *f);
  142: static void usb_host_auto_check(void *unused);
  143: static int usb_host_read_file(char *line, size_t line_size,
  144:                             const char *device_file, const char *device_name);
  145: 
  146: static struct endp_data *get_endp(USBHostDevice *s, int ep)
  147: {
  148:     return s->endp_table + ep - 1;
  149: }
  150: 
  151: static int is_isoc(USBHostDevice *s, int ep)
  152: {
  153:     return get_endp(s, ep)->type == USBDEVFS_URB_TYPE_ISO;
  154: }
  155: 
  156: static int is_valid(USBHostDevice *s, int ep)
  157: {
  158:     return get_endp(s, ep)->type != INVALID_EP_TYPE;
  159: }
  160: 
  161: static int is_halted(USBHostDevice *s, int ep)
  162: {
  163:     return get_endp(s, ep)->halted;
  164: }
  165: 
  166: static void clear_halt(USBHostDevice *s, int ep)
  167: {
  168:     get_endp(s, ep)->halted = 0;
  169: }
  170: 
  171: static void set_halt(USBHostDevice *s, int ep)
  172: {
  173:     get_endp(s, ep)->halted = 1;
  174: }
  175: 
  176: static int is_iso_started(USBHostDevice *s, int ep)
  177: {
  178:     return get_endp(s, ep)->iso_started;
  179: }
  180: 
  181: static void clear_iso_started(USBHostDevice *s, int ep)
  182: {
  183:     get_endp(s, ep)->iso_started = 0;
  184: }
  185: 
  186: static void set_iso_started(USBHostDevice *s, int ep)
  187: {
  188:     struct endp_data *e = get_endp(s, ep);
  189:     if (!e->iso_started) {
  190:         e->iso_started = 1;
  191:         e->inflight = 0;
  192:     }
  193: }
  194: 
  195: static int change_iso_inflight(USBHostDevice *s, int ep, int value)
  196: {
  197:     struct endp_data *e = get_endp(s, ep);
  198: 
  199:     e->inflight += value;
  200:     return e->inflight;
  201: }
  202: 
  203: static void set_iso_urb(USBHostDevice *s, int ep, AsyncURB *iso_urb)
  204: {
  205:     get_endp(s, ep)->iso_urb = iso_urb;
  206: }
  207: 
  208: static AsyncURB *get_iso_urb(USBHostDevice *s, int ep)
  209: {
  210:     return get_endp(s, ep)->iso_urb;
  211: }
  212: 
  213: static void set_iso_urb_idx(USBHostDevice *s, int ep, int i)
  214: {
  215:     get_endp(s, ep)->iso_urb_idx = i;
  216: }
  217: 
  218: static int get_iso_urb_idx(USBHostDevice *s, int ep)
  219: {
  220:     return get_endp(s, ep)->iso_urb_idx;
  221: }
  222: 
  223: static void set_iso_buffer_used(USBHostDevice *s, int ep, int i)
  224: {
  225:     get_endp(s, ep)->iso_buffer_used = i;
  226: }
  227: 
  228: static int get_iso_buffer_used(USBHostDevice *s, int ep)
  229: {
  230:     return get_endp(s, ep)->iso_buffer_used;
  231: }
  232: 
  233: static void set_max_packet_size(USBHostDevice *s, int ep, uint8_t *descriptor)
  234: {
  235:     int raw = descriptor[4] + (descriptor[5] << 8);
  236:     int size, microframes;
  237: 
  238:     size = raw & 0x7ff;
  239:     switch ((raw >> 11) & 3) {
  240:     case 1:  microframes = 2; break;
  241:     case 2:  microframes = 3; break;
  242:     default: microframes = 1; break;
  243:     }
  244:     get_endp(s, ep)->max_packet_size = size * microframes;
  245: }
  246: 
  247: static int get_max_packet_size(USBHostDevice *s, int ep)
  248: {
  249:     return get_endp(s, ep)->max_packet_size;
  250: }
  251: 
  252: /*
  253:  * Async URB state.
  254:  * We always allocate iso packet descriptors even for bulk transfers
  255:  * to simplify allocation and casts.
  256:  */
  257: struct AsyncURB
  258: {
  259:     struct usbdevfs_urb urb;
  260:     struct usbdevfs_iso_packet_desc isocpd[ISO_FRAME_DESC_PER_URB];
  261:     USBHostDevice *hdev;
  262:     QLIST_ENTRY(AsyncURB) next;
  263: 
  264:     /* For regular async urbs */
  265:     USBPacket     *packet;
  266:     int more; /* large transfer, more urbs follow */
  267: 
  268:     /* For buffered iso handling */
  269:     int iso_frame_idx; /* -1 means in flight */
  270: };
  271: 
  272: static AsyncURB *async_alloc(USBHostDevice *s)
  273: {
  274:     AsyncURB *aurb = qemu_mallocz(sizeof(AsyncURB));
  275:     aurb->hdev = s;
  276:     QLIST_INSERT_HEAD(&s->aurbs, aurb, next);
  277:     return aurb;
  278: }
  279: 
  280: static void async_free(AsyncURB *aurb)
  281: {
  282:     QLIST_REMOVE(aurb, next);
  283:     qemu_free(aurb);
  284: }
  285: 
  286: static void do_disconnect(USBHostDevice *s)
  287: {
  288:     printf("husb: device %d.%d disconnected\n",
  289:            s->bus_num, s->addr);
  290:     usb_host_close(s);
  291:     usb_host_auto_check(NULL);
  292: }
  293: 
  294: static void async_complete(void *opaque)
  295: {
  296:     USBHostDevice *s = opaque;
  297:     AsyncURB *aurb;
  298:     int urbs = 0;
  299: 
  300:     while (1) {
  301:         USBPacket *p;
  302: 
  303:         int r = ioctl(s->fd, USBDEVFS_REAPURBNDELAY, &aurb);
  304:         if (r < 0) {
  305:             if (errno == EAGAIN) {
  306:                 if (urbs > 2) {
  307:                     fprintf(stderr, "husb: %d iso urbs finished at once\n", urbs);
  308:                 }
  309:                 return;
  310:             }
  311:             if (errno == ENODEV && !s->closing) {
  312:                 do_disconnect(s);
  313:                 return;
  314:             }
  315: 
  316:             DPRINTF("husb: async. reap urb failed errno %d\n", errno);
  317:             return;
  318:         }
  319: 
  320:         DPRINTF("husb: async completed. aurb %p status %d alen %d\n",
  321:                 aurb, aurb->urb.status, aurb->urb.actual_length);
  322: 
  323:         /* If this is a buffered iso urb mark it as complete and don't do
  324:            anything else (it is handled further in usb_host_handle_iso_data) */
  325:         if (aurb->iso_frame_idx == -1) {
  326:             int inflight;
  327:             if (aurb->urb.status == -EPIPE) {
  328:                 set_halt(s, aurb->urb.endpoint & 0xf);
  329:             }
  330:             aurb->iso_frame_idx = 0;
  331:             urbs++;
  332:             inflight = change_iso_inflight(s, aurb->urb.endpoint & 0xf, -1);
  333:             if (inflight == 0 && is_iso_started(s, aurb->urb.endpoint & 0xf)) {
  334:                 fprintf(stderr, "husb: out of buffers for iso stream\n");
  335:             }
  336:             continue;
  337:         }
  338: 
  339:         p = aurb->packet;
  340: 
  341:         if (p) {
  342:             switch (aurb->urb.status) {
  343:             case 0:
  344:                 p->len += aurb->urb.actual_length;
  345:                 break;
  346: 
  347:             case -EPIPE:
  348:                 set_halt(s, p->devep);
  349:                 p->len = USB_RET_STALL;
  350:                 break;
  351: 
  352:             default:
  353:                 p->len = USB_RET_NAK;
  354:                 break;
  355:             }
  356: 
  357:             if (aurb->urb.type == USBDEVFS_URB_TYPE_CONTROL) {
  358:                 usb_generic_async_ctrl_complete(&s->dev, p);
  359:             } else if (!aurb->more) {
  360:                 usb_packet_complete(&s->dev, p);
  361:             }
  362:         }
  363: 
  364:         async_free(aurb);
  365:     }
  366: }
  367: 
  368: static void usb_host_async_cancel(USBDevice *dev, USBPacket *p)
  369: {
  370:     USBHostDevice *s = DO_UPCAST(USBHostDevice, dev, dev);
  371:     AsyncURB *aurb;
  372: 
  373:     QLIST_FOREACH(aurb, &s->aurbs, next) {
  374:         if (p != aurb->packet) {
  375:             continue;
  376:         }
  377: 
  378:         DPRINTF("husb: async cancel: packet %p, aurb %p\n", p, aurb);
  379: 
  380:         /* Mark it as dead (see async_complete above) */
  381:         aurb->packet = NULL;
  382: 
  383:         int r = ioctl(s->fd, USBDEVFS_DISCARDURB, aurb);
  384:         if (r < 0) {
  385:             DPRINTF("husb: async. discard urb failed errno %d\n", errno);
  386:         }
  387:     }
  388: }
  389: 
  390: static int usb_host_claim_interfaces(USBHostDevice *dev, int configuration)
  391: {
  392:     const char *op = NULL;
  393:     int dev_descr_len, config_descr_len;
  394:     int interface, nb_interfaces;
  395:     int ret, i;
  396: 
  397:     if (configuration == 0) /* address state - ignore */
  398:         return 1;
  399: 
  400:     DPRINTF("husb: claiming interfaces. config %d\n", configuration);
  401: 
  402:     i = 0;
  403:     dev_descr_len = dev->descr[0];
  404:     if (dev_descr_len > dev->descr_len) {
  405:         fprintf(stderr, "husb: update iface failed. descr too short\n");
  406:         return 0;
  407:     }
  408: 
  409:     i += dev_descr_len;
  410:     while (i < dev->descr_len) {
  411:         DPRINTF("husb: i is %d, descr_len is %d, dl %d, dt %d\n",
  412:                 i, dev->descr_len,
  413:                dev->descr[i], dev->descr[i+1]);
  414: 
  415:         if (dev->descr[i+1] != USB_DT_CONFIG) {
  416:             i += dev->descr[i];
  417:             continue;
  418:         }
  419:         config_descr_len = dev->descr[i];
  420: 
  421:         printf("husb: config #%d need %d\n", dev->descr[i + 5], configuration);
  422: 
  423:         if (configuration < 0 || configuration == dev->descr[i + 5]) {
  424:             configuration = dev->descr[i + 5];
  425:             break;
  426:         }
  427: 
  428:         i += config_descr_len;
  429:     }
  430: 
  431:     if (i >= dev->descr_len) {
  432:         fprintf(stderr,
  433:                 "husb: update iface failed. no matching configuration\n");
  434:         return 0;
  435:     }
  436:     nb_interfaces = dev->descr[i + 4];
  437: 
  438: #ifdef USBDEVFS_DISCONNECT
  439:     /* earlier Linux 2.4 do not support that */
  440:     {
  441:         struct usbdevfs_ioctl ctrl;
  442:         for (interface = 0; interface < nb_interfaces; interface++) {
  443:             ctrl.ioctl_code = USBDEVFS_DISCONNECT;
  444:             ctrl.ifno = interface;
  445:             ctrl.data = 0;
  446:             op = "USBDEVFS_DISCONNECT";
  447:             ret = ioctl(dev->fd, USBDEVFS_IOCTL, &ctrl);
  448:             if (ret < 0 && errno != ENODATA) {
  449:                 goto fail;
  450:             }
  451:         }
  452:     }
  453: #endif
  454: 
  455:     /* XXX: only grab if all interfaces are free */
  456:     for (interface = 0; interface < nb_interfaces; interface++) {
  457:         op = "USBDEVFS_CLAIMINTERFACE";
  458:         ret = ioctl(dev->fd, USBDEVFS_CLAIMINTERFACE, &interface);
  459:         if (ret < 0) {
  460:             if (errno == EBUSY) {
  461:                 printf("husb: update iface. device already grabbed\n");
  462:             } else {
  463:                 perror("husb: failed to claim interface");
  464:             }
  465:             goto fail;
  466:         }
  467:     }
  468: 
  469:     printf("husb: %d interfaces claimed for configuration %d\n",
  470:            nb_interfaces, configuration);
  471: 
  472:     dev->ninterfaces   = nb_interfaces;
  473:     dev->configuration = configuration;
  474:     return 1;
  475: 
  476: fail:
  477:     if (errno == ENODEV) {
  478:         do_disconnect(dev);
  479:     }
  480:     perror(op);
  481:     return 0;
  482: }
  483: 
  484: static int usb_host_release_interfaces(USBHostDevice *s)
  485: {
  486:     int ret, i;
  487: 
  488:     DPRINTF("husb: releasing interfaces\n");
  489: 
  490:     for (i = 0; i < s->ninterfaces; i++) {
  491:         ret = ioctl(s->fd, USBDEVFS_RELEASEINTERFACE, &i);
  492:         if (ret < 0) {
  493:             perror("husb: failed to release interface");
  494:             return 0;
  495:         }
  496:     }
  497: 
  498:     return 1;
  499: }
  500: 
  501: static void usb_host_handle_reset(USBDevice *dev)
  502: {
  503:     USBHostDevice *s = DO_UPCAST(USBHostDevice, dev, dev);
  504: 
  505:     DPRINTF("husb: reset device %u.%u\n", s->bus_num, s->addr);
  506: 
  507:     ioctl(s->fd, USBDEVFS_RESET);
  508: 
  509:     usb_host_claim_interfaces(s, s->configuration);
  510: }
  511: 
  512: static void usb_host_handle_destroy(USBDevice *dev)
  513: {
  514:     USBHostDevice *s = (USBHostDevice *)dev;
  515: 
  516:     usb_host_close(s);
  517:     QTAILQ_REMOVE(&hostdevs, s, next);
  518:     qemu_remove_exit_notifier(&s->exit);
  519: }
  520: 
  521: static int usb_linux_update_endp_table(USBHostDevice *s);
  522: 
  523: /* iso data is special, we need to keep enough urbs in flight to make sure
  524:    that the controller never runs out of them, otherwise the device will
  525:    likely suffer a buffer underrun / overrun. */
  526: static AsyncURB *usb_host_alloc_iso(USBHostDevice *s, uint8_t ep, int in)
  527: {
  528:     AsyncURB *aurb;
  529:     int i, j, len = get_max_packet_size(s, ep);
  530: 
  531:     aurb = qemu_mallocz(s->iso_urb_count * sizeof(*aurb));
  532:     for (i = 0; i < s->iso_urb_count; i++) {
  533:         aurb[i].urb.endpoint      = ep;
  534:         aurb[i].urb.buffer_length = ISO_FRAME_DESC_PER_URB * len;
  535:         aurb[i].urb.buffer        = qemu_malloc(aurb[i].urb.buffer_length);
  536:         aurb[i].urb.type          = USBDEVFS_URB_TYPE_ISO;
  537:         aurb[i].urb.flags         = USBDEVFS_URB_ISO_ASAP;
  538:         aurb[i].urb.number_of_packets = ISO_FRAME_DESC_PER_URB;
  539:         for (j = 0 ; j < ISO_FRAME_DESC_PER_URB; j++)
  540:             aurb[i].urb.iso_frame_desc[j].length = len;
  541:         if (in) {
  542:             aurb[i].urb.endpoint |= 0x80;
  543:             /* Mark as fully consumed (idle) */
  544:             aurb[i].iso_frame_idx = ISO_FRAME_DESC_PER_URB;
  545:         }
  546:     }
  547:     set_iso_urb(s, ep, aurb);
  548: 
  549:     return aurb;
  550: }
  551: 
  552: static void usb_host_stop_n_free_iso(USBHostDevice *s, uint8_t ep)
  553: {
  554:     AsyncURB *aurb;
  555:     int i, ret, killed = 0, free = 1;
  556: 
  557:     aurb = get_iso_urb(s, ep);
  558:     if (!aurb) {
  559:         return;
  560:     }
  561: 
  562:     for (i = 0; i < s->iso_urb_count; i++) {
  563:         /* in flight? */
  564:         if (aurb[i].iso_frame_idx == -1) {
  565:             ret = ioctl(s->fd, USBDEVFS_DISCARDURB, &aurb[i]);
  566:             if (ret < 0) {
  567:                 printf("husb: discard isoc in urb failed errno %d\n", errno);
  568:                 free = 0;
  569:                 continue;
  570:             }
  571:             killed++;
  572:         }
  573:     }
  574: 
  575:     /* Make sure any urbs we've killed are reaped before we free them */
  576:     if (killed) {
  577:         async_complete(s);
  578:     }
  579: 
  580:     for (i = 0; i < s->iso_urb_count; i++) {
  581:         qemu_free(aurb[i].urb.buffer);
  582:     }
  583: 
  584:     if (free)
  585:         qemu_free(aurb);
  586:     else
  587:         printf("husb: leaking iso urbs because of discard failure\n");
  588:     set_iso_urb(s, ep, NULL);
  589:     set_iso_urb_idx(s, ep, 0);
  590:     clear_iso_started(s, ep);
  591: }
  592: 
  593: static int urb_status_to_usb_ret(int status)
  594: {
  595:     switch (status) {
  596:     case -EPIPE:
  597:         return USB_RET_STALL;
  598:     default:
  599:         return USB_RET_NAK;
  600:     }
  601: }
  602: 
  603: static int usb_host_handle_iso_data(USBHostDevice *s, USBPacket *p, int in)
  604: {
  605:     AsyncURB *aurb;
  606:     int i, j, ret, max_packet_size, offset, len = 0;
  607: 
  608:     max_packet_size = get_max_packet_size(s, p->devep);
  609:     if (max_packet_size == 0)
  610:         return USB_RET_NAK;
  611: 
  612:     aurb = get_iso_urb(s, p->devep);
  613:     if (!aurb) {
  614:         aurb = usb_host_alloc_iso(s, p->devep, in);
  615:     }
  616: 
  617:     i = get_iso_urb_idx(s, p->devep);
  618:     j = aurb[i].iso_frame_idx;
  619:     if (j >= 0 && j < ISO_FRAME_DESC_PER_URB) {
  620:         if (in) {
  621:             /* Check urb status  */
  622:             if (aurb[i].urb.status) {
  623:                 len = urb_status_to_usb_ret(aurb[i].urb.status);
  624:                 /* Move to the next urb */
  625:                 aurb[i].iso_frame_idx = ISO_FRAME_DESC_PER_URB - 1;
  626:             /* Check frame status */
  627:             } else if (aurb[i].urb.iso_frame_desc[j].status) {
  628:                 len = urb_status_to_usb_ret(
  629:                                         aurb[i].urb.iso_frame_desc[j].status);
  630:             /* Check the frame fits */
  631:             } else if (aurb[i].urb.iso_frame_desc[j].actual_length > p->len) {
  632:                 printf("husb: received iso data is larger then packet\n");
  633:                 len = USB_RET_NAK;
  634:             /* All good copy data over */
  635:             } else {
  636:                 len = aurb[i].urb.iso_frame_desc[j].actual_length;
  637:                 memcpy(p->data,
  638:                        aurb[i].urb.buffer +
  639:                            j * aurb[i].urb.iso_frame_desc[0].length,
  640:                        len);
  641:             }
  642:         } else {
  643:             len = p->len;
  644:             offset = (j == 0) ? 0 : get_iso_buffer_used(s, p->devep);
  645: 
  646:             /* Check the frame fits */
  647:             if (len > max_packet_size) {
  648:                 printf("husb: send iso data is larger then max packet size\n");
  649:                 return USB_RET_NAK;
  650:             }
  651: 
  652:             /* All good copy data over */
  653:             memcpy(aurb[i].urb.buffer + offset, p->data, len);
  654:             aurb[i].urb.iso_frame_desc[j].length = len;
  655:             offset += len;
  656:             set_iso_buffer_used(s, p->devep, offset);
  657: 
  658:             /* Start the stream once we have buffered enough data */
  659:             if (!is_iso_started(s, p->devep) && i == 1 && j == 8) {
  660:                 set_iso_started(s, p->devep);
  661:             }
  662:         }
  663:         aurb[i].iso_frame_idx++;
  664:         if (aurb[i].iso_frame_idx == ISO_FRAME_DESC_PER_URB) {
  665:             i = (i + 1) % s->iso_urb_count;
  666:             set_iso_urb_idx(s, p->devep, i);
  667:         }
  668:     } else {
  669:         if (in) {
  670:             set_iso_started(s, p->devep);
  671:         } else {
  672:             DPRINTF("hubs: iso out error no free buffer, dropping packet\n");
  673:         }
  674:     }
  675: 
  676:     if (is_iso_started(s, p->devep)) {
  677:         /* (Re)-submit all fully consumed / filled urbs */
  678:         for (i = 0; i < s->iso_urb_count; i++) {
  679:             if (aurb[i].iso_frame_idx == ISO_FRAME_DESC_PER_URB) {
  680:                 ret = ioctl(s->fd, USBDEVFS_SUBMITURB, &aurb[i]);
  681:                 if (ret < 0) {
  682:                     printf("husb error submitting iso urb %d: %d\n", i, errno);
  683:                     if (!in || len == 0) {
  684:                         switch(errno) {
  685:                         case ETIMEDOUT:
  686:                             len = USB_RET_NAK;
  687:                             break;
  688:                         case EPIPE:
  689:                         default:
  690:                             len = USB_RET_STALL;
  691:                         }
  692:                     }
  693:                     break;
  694:                 }
  695:                 aurb[i].iso_frame_idx = -1;
  696:                 change_iso_inflight(s, p->devep, +1);
  697:             }
  698:         }
  699:     }
  700: 
  701:     return len;
  702: }
  703: 
  704: static int usb_host_handle_data(USBDevice *dev, USBPacket *p)
  705: {
  706:     USBHostDevice *s = DO_UPCAST(USBHostDevice, dev, dev);
  707:     struct usbdevfs_urb *urb;
  708:     AsyncURB *aurb;
  709:     int ret, rem;
  710:     uint8_t *pbuf;
  711:     uint8_t ep;
  712: 
  713:     if (!is_valid(s, p->devep)) {
  714:         return USB_RET_NAK;
  715:     }
  716: 
  717:     if (p->pid == USB_TOKEN_IN) {
  718:         ep = p->devep | 0x80;
  719:     } else {
  720:         ep = p->devep;
  721:     }
  722: 
  723:     if (is_halted(s, p->devep)) {
  724:         ret = ioctl(s->fd, USBDEVFS_CLEAR_HALT, &ep);
  725:         if (ret < 0) {
  726:             DPRINTF("husb: failed to clear halt. ep 0x%x errno %d\n",
  727:                    ep, errno);
  728:             return USB_RET_NAK;
  729:         }
  730:         clear_halt(s, p->devep);
  731:     }
  732: 
  733:     if (is_isoc(s, p->devep)) {
  734:         return usb_host_handle_iso_data(s, p, p->pid == USB_TOKEN_IN);
  735:     }
  736: 
  737:     rem = p->len;
  738:     pbuf = p->data;
  739:     p->len = 0;
  740:     while (rem) {
  741:         aurb = async_alloc(s);
  742:         aurb->packet = p;
  743: 
  744:         urb = &aurb->urb;
  745:         urb->endpoint      = ep;
  746:         urb->type          = USBDEVFS_URB_TYPE_BULK;
  747:         urb->usercontext   = s;
  748:         urb->buffer        = pbuf;
  749: 
  750:         if (rem > MAX_USBFS_BUFFER_SIZE) {
  751:             urb->buffer_length = MAX_USBFS_BUFFER_SIZE;
  752:             aurb->more         = 1;
  753:         } else {
  754:             urb->buffer_length = rem;
  755:             aurb->more         = 0;
  756:         }
  757:         pbuf += urb->buffer_length;
  758:         rem  -= urb->buffer_length;
  759: 
  760:         ret = ioctl(s->fd, USBDEVFS_SUBMITURB, urb);
  761: 
  762:         DPRINTF("husb: data submit: ep 0x%x, len %u, more %d, packet %p, aurb %p\n",
  763:                 urb->endpoint, urb->buffer_length, aurb->more, p, aurb);
  764: 
  765:         if (ret < 0) {
  766:             DPRINTF("husb: submit failed. errno %d\n", errno);
  767:             async_free(aurb);
  768: 
  769:             switch(errno) {
  770:             case ETIMEDOUT:
  771:                 return USB_RET_NAK;
  772:             case EPIPE:
  773:             default:
  774:                 return USB_RET_STALL;
  775:             }
  776:         }
  777:     }
  778: 
  779:     return USB_RET_ASYNC;
  780: }
  781: 
  782: static int ctrl_error(void)
  783: {
  784:     if (errno == ETIMEDOUT) {
  785:         return USB_RET_NAK;
  786:     } else {
  787:         return USB_RET_STALL;
  788:     }
  789: }
  790: 
  791: static int usb_host_set_address(USBHostDevice *s, int addr)
  792: {
  793:     DPRINTF("husb: ctrl set addr %u\n", addr);
  794:     s->dev.addr = addr;
  795:     return 0;
  796: }
  797: 
  798: static int usb_host_set_config(USBHostDevice *s, int config)
  799: {
  800:     usb_host_release_interfaces(s);
  801: 
  802:     int ret = ioctl(s->fd, USBDEVFS_SETCONFIGURATION, &config);
  803: 
  804:     DPRINTF("husb: ctrl set config %d ret %d errno %d\n", config, ret, errno);
  805: 
  806:     if (ret < 0) {
  807:         return ctrl_error();
  808:     }
  809:     usb_host_claim_interfaces(s, config);
  810:     return 0;
  811: }
  812: 
  813: static int usb_host_set_interface(USBHostDevice *s, int iface, int alt)
  814: {
  815:     struct usbdevfs_setinterface si;
  816:     int i, ret;
  817: 
  818:     for (i = 1; i <= MAX_ENDPOINTS; i++) {
  819:         if (is_isoc(s, i)) {
  820:             usb_host_stop_n_free_iso(s, i);
  821:         }
  822:     }
  823: 
  824:     si.interface  = iface;
  825:     si.altsetting = alt;
  826:     ret = ioctl(s->fd, USBDEVFS_SETINTERFACE, &si);
  827: 
  828:     DPRINTF("husb: ctrl set iface %d altset %d ret %d errno %d\n",
  829:             iface, alt, ret, errno);
  830: 
  831:     if (ret < 0) {
  832:         return ctrl_error();
  833:     }
  834:     usb_linux_update_endp_table(s);
  835:     return 0;
  836: }
  837: 
  838: static int usb_host_handle_control(USBDevice *dev, USBPacket *p,
  839:                int request, int value, int index, int length, uint8_t *data)
  840: {
  841:     USBHostDevice *s = DO_UPCAST(USBHostDevice, dev, dev);
  842:     struct usbdevfs_urb *urb;
  843:     AsyncURB *aurb;
  844:     int ret;
  845: 
  846:     /*
  847:      * Process certain standard device requests.
  848:      * These are infrequent and are processed synchronously.
  849:      */
  850: 
  851:     /* Note request is (bRequestType << 8) | bRequest */
  852:     DPRINTF("husb: ctrl type 0x%x req 0x%x val 0x%x index %u len %u\n",
  853:             request >> 8, request & 0xff, value, index, length);
  854: 
  855:     switch (request) {
  856:     case DeviceOutRequest | USB_REQ_SET_ADDRESS:
  857:         return usb_host_set_address(s, value);
  858: 
  859:     case DeviceOutRequest | USB_REQ_SET_CONFIGURATION:
  860:         return usb_host_set_config(s, value & 0xff);
  861: 
  862:     case InterfaceOutRequest | USB_REQ_SET_INTERFACE:
  863:         return usb_host_set_interface(s, index, value);
  864:     }
  865: 
  866:     /* The rest are asynchronous */
  867: 
  868:     if (length > sizeof(dev->data_buf)) {
  869:         fprintf(stderr, "husb: ctrl buffer too small (%d > %zu)\n",
  870:                 length, sizeof(dev->data_buf));
  871:         return USB_RET_STALL;
  872:     }
  873: 
  874:     aurb = async_alloc(s);
  875:     aurb->packet = p;
  876: 
  877:     /*
  878:      * Setup ctrl transfer.
  879:      *
  880:      * s->ctrl is laid out such that data buffer immediately follows
  881:      * 'req' struct which is exactly what usbdevfs expects.
  882:      */
  883:     urb = &aurb->urb;
  884: 
  885:     urb->type     = USBDEVFS_URB_TYPE_CONTROL;
  886:     urb->endpoint = p->devep;
  887: 
  888:     urb->buffer        = &dev->setup_buf;
  889:     urb->buffer_length = length + 8;
  890: 
  891:     urb->usercontext = s;
  892: 
  893:     ret = ioctl(s->fd, USBDEVFS_SUBMITURB, urb);
  894: 
  895:     DPRINTF("husb: submit ctrl. len %u aurb %p\n", urb->buffer_length, aurb);
  896: 
  897:     if (ret < 0) {
  898:         DPRINTF("husb: submit failed. errno %d\n", errno);
  899:         async_free(aurb);
  900: 
  901:         switch(errno) {
  902:         case ETIMEDOUT:
  903:             return USB_RET_NAK;
  904:         case EPIPE:
  905:         default:
  906:             return USB_RET_STALL;
  907:         }
  908:     }
  909: 
  910:     return USB_RET_ASYNC;
  911: }
  912: 
  913: static int usb_linux_get_configuration(USBHostDevice *s)
  914: {
  915:     uint8_t configuration;
  916:     struct usb_ctrltransfer ct;
  917:     int ret;
  918: 
  919:     if (usb_fs_type == USB_FS_SYS) {
  920:         char device_name[32], line[1024];
  921:         int configuration;
  922: 
  923:         sprintf(device_name, "%d-%s", s->bus_num, s->port);
  924: 
  925:         if (!usb_host_read_file(line, sizeof(line), "bConfigurationValue",
  926:                                 device_name)) {
  927:             goto usbdevfs;
  928:         }
  929:         if (sscanf(line, "%d", &configuration) != 1) {
  930:             goto usbdevfs;
  931:         }
  932:         return configuration;
  933:     }
  934: 
  935: usbdevfs:
  936:     ct.bRequestType = USB_DIR_IN;
  937:     ct.bRequest = USB_REQ_GET_CONFIGURATION;
  938:     ct.wValue = 0;
  939:     ct.wIndex = 0;
  940:     ct.wLength = 1;
  941:     ct.data = &configuration;
  942:     ct.timeout = 50;
  943: 
  944:     ret = ioctl(s->fd, USBDEVFS_CONTROL, &ct);
  945:     if (ret < 0) {
  946:         perror("usb_linux_get_configuration");
  947:         return -1;
  948:     }
  949: 
  950:     /* in address state */
  951:     if (configuration == 0) {
  952:         return -1;
  953:     }
  954: 
  955:     return configuration;
  956: }
  957: 
  958: static uint8_t usb_linux_get_alt_setting(USBHostDevice *s,
  959:     uint8_t configuration, uint8_t interface)
  960: {
  961:     uint8_t alt_setting;
  962:     struct usb_ctrltransfer ct;
  963:     int ret;
  964: 
  965:     if (usb_fs_type == USB_FS_SYS) {
  966:         char device_name[64], line[1024];
  967:         int alt_setting;
  968: 
  969:         sprintf(device_name, "%d-%s:%d.%d", s->bus_num, s->port,
  970:                 (int)configuration, (int)interface);
  971: 
  972:         if (!usb_host_read_file(line, sizeof(line), "bAlternateSetting",
  973:                                 device_name)) {
  974:             goto usbdevfs;
  975:         }
  976:         if (sscanf(line, "%d", &alt_setting) != 1) {
  977:             goto usbdevfs;
  978:         }
  979:         return alt_setting;
  980:     }
  981: 
  982: usbdevfs:
  983:     ct.bRequestType = USB_DIR_IN | USB_RECIP_INTERFACE;
  984:     ct.bRequest = USB_REQ_GET_INTERFACE;
  985:     ct.wValue = 0;
  986:     ct.wIndex = interface;
  987:     ct.wLength = 1;
  988:     ct.data = &alt_setting;
  989:     ct.timeout = 50;
  990:     ret = ioctl(s->fd, USBDEVFS_CONTROL, &ct);
  991:     if (ret < 0) {
  992:         /* Assume alt 0 on error */
  993:         return 0;
  994:     }
  995: 
  996:     return alt_setting;
  997: }
  998: 
  999: /* returns 1 on problem encountered or 0 for success */
 1000: static int usb_linux_update_endp_table(USBHostDevice *s)
 1001: {
 1002:     uint8_t *descriptors;
 1003:     uint8_t devep, type, configuration, alt_interface;
 1004:     int interface, length, i;
 1005: 
 1006:     for (i = 0; i < MAX_ENDPOINTS; i++)
 1007:         s->endp_table[i].type = INVALID_EP_TYPE;
 1008: 
 1009:     i = usb_linux_get_configuration(s);
 1010:     if (i < 0)
 1011:         return 1;
 1012:     configuration = i;
 1013: 
 1014:     /* get the desired configuration, interface, and endpoint descriptors
 1015:      * from device description */
 1016:     descriptors = &s->descr[18];
 1017:     length = s->descr_len - 18;
 1018:     i = 0;
 1019: 
 1020:     if (descriptors[i + 1] != USB_DT_CONFIG ||
 1021:         descriptors[i + 5] != configuration) {
 1022:         DPRINTF("invalid descriptor data - configuration\n");
 1023:         return 1;
 1024:     }
 1025:     i += descriptors[i];
 1026: 
 1027:     while (i < length) {
 1028:         if (descriptors[i + 1] != USB_DT_INTERFACE ||
 1029:             (descriptors[i + 1] == USB_DT_INTERFACE &&
 1030:              descriptors[i + 4] == 0)) {
 1031:             i += descriptors[i];
 1032:             continue;
 1033:         }
 1034: 
 1035:         interface = descriptors[i + 2];
 1036:         alt_interface = usb_linux_get_alt_setting(s, configuration, interface);
 1037: 
 1038:         /* the current interface descriptor is the active interface
 1039:          * and has endpoints */
 1040:         if (descriptors[i + 3] != alt_interface) {
 1041:             i += descriptors[i];
 1042:             continue;
 1043:         }
 1044: 
 1045:         /* advance to the endpoints */
 1046:         while (i < length && descriptors[i +1] != USB_DT_ENDPOINT) {
 1047:             i += descriptors[i];
 1048:         }
 1049: 
 1050:         if (i >= length)
 1051:             break;
 1052: 
 1053:         while (i < length) {
 1054:             if (descriptors[i + 1] != USB_DT_ENDPOINT) {
 1055:                 break;
 1056:             }
 1057: 
 1058:             devep = descriptors[i + 2];
 1059:             if ((devep & 0x0f) == 0) {
 1060:                 fprintf(stderr, "usb-linux: invalid ep descriptor, ep == 0\n");
 1061:                 return 1;
 1062:             }
 1063: 
 1064:             switch (descriptors[i + 3] & 0x3) {
 1065:             case 0x00:
 1066:                 type = USBDEVFS_URB_TYPE_CONTROL;
 1067:                 break;
 1068:             case 0x01:
 1069:                 type = USBDEVFS_URB_TYPE_ISO;
 1070:                 set_max_packet_size(s, (devep & 0xf), descriptors + i);
 1071:                 break;
 1072:             case 0x02:
 1073:                 type = USBDEVFS_URB_TYPE_BULK;
 1074:                 break;
 1075:             case 0x03:
 1076:                 type = USBDEVFS_URB_TYPE_INTERRUPT;
 1077:                 break;
 1078:             default:
 1079:                 DPRINTF("usb_host: malformed endpoint type\n");
 1080:                 type = USBDEVFS_URB_TYPE_BULK;
 1081:             }
 1082:             s->endp_table[(devep & 0xf) - 1].type = type;
 1083:             s->endp_table[(devep & 0xf) - 1].halted = 0;
 1084: 
 1085:             i += descriptors[i];
 1086:         }
 1087:     }
 1088:     return 0;
 1089: }
 1090: 
 1091: /*
 1092:  * Check if we can safely redirect a usb2 device to a usb1 virtual controller,
 1093:  * this function assumes this is safe, if:
 1094:  * 1) There are no isoc endpoints
 1095:  * 2) There are no interrupt endpoints with a max_packet_size > 64
 1096:  * Note bulk endpoints with a max_packet_size > 64 in theory also are not
 1097:  * usb1 compatible, but in practice this seems to work fine.
 1098:  */
 1099: static int usb_linux_full_speed_compat(USBHostDevice *dev)
 1100: {
 1101:     int i, packet_size;
 1102: 
 1103:     /*
 1104:      * usb_linux_update_endp_table only registers info about ep in the current
 1105:      * interface altsettings, so we need to parse the descriptors again.
 1106:      */
 1107:     for (i = 0; (i + 5) < dev->descr_len; i += dev->descr[i]) {
 1108:         if (dev->descr[i + 1] == USB_DT_ENDPOINT) {
 1109:             switch (dev->descr[i + 3] & 0x3) {
 1110:             case 0x00: /* CONTROL */
 1111:                 break;
 1112:             case 0x01: /* ISO */
 1113:                 return 0;
 1114:             case 0x02: /* BULK */
 1115:                 break;
 1116:             case 0x03: /* INTERRUPT */
 1117:                 packet_size = dev->descr[i + 4] + (dev->descr[i + 5] << 8);
 1118:                 if (packet_size > 64)
 1119:                     return 0;
 1120:                 break;
 1121:             }
 1122:         }
 1123:     }
 1124:     return 1;
 1125: }
 1126: 
 1127: static int usb_host_open(USBHostDevice *dev, int bus_num,
 1128:                         int addr, char *port, const char *prod_name, int speed)
 1129: {
 1130:     int fd = -1, ret;
 1131:     char buf[1024];
 1132: 
 1133:     if (dev->fd != -1) {
 1134:         goto fail;
 1135:     }
 1136:     printf("husb: open device %d.%d\n", bus_num, addr);
 1137: 
 1138:     if (!usb_host_device_path) {
 1139:         perror("husb: USB Host Device Path not set");
 1140:         goto fail;
 1141:     }
 1142:     snprintf(buf, sizeof(buf), "%s/%03d/%03d", usb_host_device_path,
 1143:              bus_num, addr);
 1144:     fd = open(buf, O_RDWR | O_NONBLOCK);
 1145:     if (fd < 0) {
 1146:         perror(buf);
 1147:         goto fail;
 1148:     }
 1149:     DPRINTF("husb: opened %s\n", buf);
 1150: 
 1151:     dev->bus_num = bus_num;
 1152:     dev->addr = addr;
 1153:     strcpy(dev->port, port);
 1154:     dev->fd = fd;
 1155: 
 1156:     /* read the device description */
 1157:     dev->descr_len = read(fd, dev->descr, sizeof(dev->descr));
 1158:     if (dev->descr_len <= 0) {
 1159:         perror("husb: reading device data failed");
 1160:         goto fail;
 1161:     }
 1162: 
 1163: #ifdef DEBUG
 1164:     {
 1165:         int x;
 1166:         printf("=== begin dumping device descriptor data ===\n");
 1167:         for (x = 0; x < dev->descr_len; x++) {
 1168:             printf("%02x ", dev->descr[x]);
 1169:         }
 1170:         printf("\n=== end dumping device descriptor data ===\n");
 1171:     }
 1172: #endif
 1173: 
 1174: 
 1175:     /*
 1176:      * Initial configuration is -1 which makes us claim first
 1177:      * available config. We used to start with 1, which does not
 1178:      * always work. I've seen devices where first config starts
 1179:      * with 2.
 1180:      */
 1181:     if (!usb_host_claim_interfaces(dev, -1)) {
 1182:         goto fail;
 1183:     }
 1184: 
 1185:     ret = usb_linux_update_endp_table(dev);
 1186:     if (ret) {
 1187:         goto fail;
 1188:     }
 1189: 
 1190:     if (speed == -1) {
 1191:         struct usbdevfs_connectinfo ci;
 1192: 
 1193:         ret = ioctl(fd, USBDEVFS_CONNECTINFO, &ci);
 1194:         if (ret < 0) {
 1195:             perror("usb_host_device_open: USBDEVFS_CONNECTINFO");
 1196:             goto fail;
 1197:         }
 1198: 
 1199:         if (ci.slow) {
 1200:             speed = USB_SPEED_LOW;
 1201:         } else {
 1202:             speed = USB_SPEED_HIGH;
 1203:         }
 1204:     }
 1205:     dev->dev.speed = speed;
 1206:     dev->dev.speedmask = (1 << speed);
 1207:     if (dev->dev.speed == USB_SPEED_HIGH && usb_linux_full_speed_compat(dev)) {
 1208:         dev->dev.speedmask |= USB_SPEED_MASK_FULL;
 1209:     }
 1210: 
 1211:     printf("husb: grabbed usb device %d.%d\n", bus_num, addr);
 1212: 
 1213:     if (!prod_name || prod_name[0] == '\0') {
 1214:         snprintf(dev->dev.product_desc, sizeof(dev->dev.product_desc),
 1215:                  "host:%d.%d", bus_num, addr);
 1216:     } else {
 1217:         pstrcpy(dev->dev.product_desc, sizeof(dev->dev.product_desc),
 1218:                 prod_name);
 1219:     }
 1220: 
 1221:     ret = usb_device_attach(&dev->dev);
 1222:     if (ret) {
 1223:         goto fail;
 1224:     }
 1225: 
 1226:     /* USB devio uses 'write' flag to check for async completions */
 1227:     qemu_set_fd_handler(dev->fd, NULL, async_complete, dev);
 1228: 
 1229:     return 0;
 1230: 
 1231: fail:
 1232:     if (dev->fd != -1) {
 1233:         close(dev->fd);
 1234:         dev->fd = -1;
 1235:     }
 1236:     return -1;
 1237: }
 1238: 
 1239: static int usb_host_close(USBHostDevice *dev)
 1240: {
 1241:     int i;
 1242: 
 1243:     if (dev->fd == -1 || !dev->dev.attached) {
 1244:         return -1;
 1245:     }
 1246: 
 1247:     qemu_set_fd_handler(dev->fd, NULL, NULL, NULL);
 1248:     dev->closing = 1;
 1249:     for (i = 1; i <= MAX_ENDPOINTS; i++) {
 1250:         if (is_isoc(dev, i)) {
 1251:             usb_host_stop_n_free_iso(dev, i);
 1252:         }
 1253:     }
 1254:     async_complete(dev);
 1255:     dev->closing = 0;
 1256:     usb_device_detach(&dev->dev);
 1257:     ioctl(dev->fd, USBDEVFS_RESET);
 1258:     close(dev->fd);
 1259:     dev->fd = -1;
 1260:     return 0;
 1261: }
 1262: 
 1263: static void usb_host_exit_notifier(struct Notifier *n, void *data)
 1264: {
 1265:     USBHostDevice *s = container_of(n, USBHostDevice, exit);
 1266: 
 1267:     if (s->fd != -1) {
 1268:         ioctl(s->fd, USBDEVFS_RESET);
 1269:     }
 1270: }
 1271: 
 1272: static int usb_host_initfn(USBDevice *dev)
 1273: {
 1274:     USBHostDevice *s = DO_UPCAST(USBHostDevice, dev, dev);
 1275: 
 1276:     dev->auto_attach = 0;
 1277:     s->fd = -1;
 1278:     QTAILQ_INSERT_TAIL(&hostdevs, s, next);
 1279:     s->exit.notify = usb_host_exit_notifier;
 1280:     qemu_add_exit_notifier(&s->exit);
 1281:     usb_host_auto_check(NULL);
 1282:     return 0;
 1283: }
 1284: 
 1285: static struct USBDeviceInfo usb_host_dev_info = {
 1286:     .product_desc   = "USB Host Device",
 1287:     .qdev.name      = "usb-host",
 1288:     .qdev.size      = sizeof(USBHostDevice),
 1289:     .init           = usb_host_initfn,
 1290:     .handle_packet  = usb_generic_handle_packet,
 1291:     .cancel_packet  = usb_host_async_cancel,
 1292:     .handle_data    = usb_host_handle_data,
 1293:     .handle_control = usb_host_handle_control,
 1294:     .handle_reset   = usb_host_handle_reset,
 1295:     .handle_destroy = usb_host_handle_destroy,
 1296:     .usbdevice_name = "host",
 1297:     .usbdevice_init = usb_host_device_open,
 1298:     .qdev.props     = (Property[]) {
 1299:         DEFINE_PROP_UINT32("hostbus",  USBHostDevice, match.bus_num,    0),
 1300:         DEFINE_PROP_UINT32("hostaddr", USBHostDevice, match.addr,       0),
 1301:         DEFINE_PROP_STRING("hostport", USBHostDevice, match.port),
 1302:         DEFINE_PROP_HEX32("vendorid",  USBHostDevice, match.vendor_id,  0),
 1303:         DEFINE_PROP_HEX32("productid", USBHostDevice, match.product_id, 0),
 1304:         DEFINE_PROP_UINT32("isobufs",  USBHostDevice, iso_urb_count,    4),
 1305:         DEFINE_PROP_END_OF_LIST(),
 1306:     },
 1307: };
 1308: 
 1309: static void usb_host_register_devices(void)
 1310: {
 1311:     usb_qdev_register(&usb_host_dev_info);
 1312: }
 1313: device_init(usb_host_register_devices)
 1314: 
 1315: USBDevice *usb_host_device_open(const char *devname)
 1316: {
 1317:     struct USBAutoFilter filter;
 1318:     USBDevice *dev;
 1319:     char *p;
 1320: 
 1321:     dev = usb_create(NULL /* FIXME */, "usb-host");
 1322: 
 1323:     if (strstr(devname, "auto:")) {
 1324:         if (parse_filter(devname, &filter) < 0) {
 1325:             goto fail;
 1326:         }
 1327:     } else {
 1328:         if ((p = strchr(devname, '.'))) {
 1329:             filter.bus_num    = strtoul(devname, NULL, 0);
 1330:             filter.addr       = strtoul(p + 1, NULL, 0);
 1331:             filter.vendor_id  = 0;
 1332:             filter.product_id = 0;
 1333:         } else if ((p = strchr(devname, ':'))) {
 1334:             filter.bus_num    = 0;
 1335:             filter.addr       = 0;
 1336:             filter.vendor_id  = strtoul(devname, NULL, 16);
 1337:             filter.product_id = strtoul(p + 1, NULL, 16);
 1338:         } else {
 1339:             goto fail;
 1340:         }
 1341:     }
 1342: 
 1343:     qdev_prop_set_uint32(&dev->qdev, "hostbus",   filter.bus_num);
 1344:     qdev_prop_set_uint32(&dev->qdev, "hostaddr",  filter.addr);
 1345:     qdev_prop_set_uint32(&dev->qdev, "vendorid",  filter.vendor_id);
 1346:     qdev_prop_set_uint32(&dev->qdev, "productid", filter.product_id);
 1347:     qdev_init_nofail(&dev->qdev);
 1348:     return dev;
 1349: 
 1350: fail:
 1351:     qdev_free(&dev->qdev);
 1352:     return NULL;
 1353: }
 1354: 
 1355: int usb_host_device_close(const char *devname)
 1356: {
 1357: #if 0
 1358:     char product_name[PRODUCT_NAME_SZ];
 1359:     int bus_num, addr;
 1360:     USBHostDevice *s;
 1361: 
 1362:     if (strstr(devname, "auto:")) {
 1363:         return usb_host_auto_del(devname);
 1364:     }
 1365:     if (usb_host_find_device(&bus_num, &addr, product_name,
 1366:                                     sizeof(product_name), devname) < 0) {
 1367:         return -1;
 1368:     }
 1369:     s = hostdev_find(bus_num, addr);
 1370:     if (s) {
 1371:         usb_device_delete_addr(s->bus_num, s->dev.addr);
 1372:         return 0;
 1373:     }
 1374: #endif
 1375: 
 1376:     return -1;
 1377: }
 1378: 
 1379: static int get_tag_value(char *buf, int buf_size,
 1380:                          const char *str, const char *tag,
 1381:                          const char *stopchars)
 1382: {
 1383:     const char *p;
 1384:     char *q;
 1385:     p = strstr(str, tag);
 1386:     if (!p) {
 1387:         return -1;
 1388:     }
 1389:     p += strlen(tag);
 1390:     while (qemu_isspace(*p)) {
 1391:         p++;
 1392:     }
 1393:     q = buf;
 1394:     while (*p != '\0' && !strchr(stopchars, *p)) {
 1395:         if ((q - buf) < (buf_size - 1)) {
 1396:             *q++ = *p;
 1397:         }
 1398:         p++;
 1399:     }
 1400:     *q = '\0';
 1401:     return q - buf;
 1402: }
 1403: 
 1404: /*
 1405:  * Use /proc/bus/usb/devices or /dev/bus/usb/devices file to determine
 1406:  * host's USB devices. This is legacy support since many distributions
 1407:  * are moving to /sys/bus/usb
 1408:  */
 1409: static int usb_host_scan_dev(void *opaque, USBScanFunc *func)
 1410: {
 1411:     FILE *f = NULL;
 1412:     char line[1024];
 1413:     char buf[1024];
 1414:     int bus_num, addr, speed, device_count, class_id, product_id, vendor_id;
 1415:     char product_name[512];
 1416:     int ret = 0;
 1417: 
 1418:     if (!usb_host_device_path) {
 1419:         perror("husb: USB Host Device Path not set");
 1420:         goto the_end;
 1421:     }
 1422:     snprintf(line, sizeof(line), "%s/devices", usb_host_device_path);
 1423:     f = fopen(line, "r");
 1424:     if (!f) {
 1425:         perror("husb: cannot open devices file");
 1426:         goto the_end;
 1427:     }
 1428: 
 1429:     device_count = 0;
 1430:     bus_num = addr = class_id = product_id = vendor_id = 0;
 1431:     speed = -1; /* Can't get the speed from /[proc|dev]/bus/usb/devices */
 1432:     for(;;) {
 1433:         if (fgets(line, sizeof(line), f) == NULL) {
 1434:             break;
 1435:         }
 1436:         if (strlen(line) > 0) {
 1437:             line[strlen(line) - 1] = '\0';
 1438:         }
 1439:         if (line[0] == 'T' && line[1] == ':') {
 1440:             if (device_count && (vendor_id || product_id)) {
 1441:                 /* New device.  Add the previously discovered device.  */
 1442:                 ret = func(opaque, bus_num, addr, 0, class_id, vendor_id,
 1443:                            product_id, product_name, speed);
 1444:                 if (ret) {
 1445:                     goto the_end;
 1446:                 }
 1447:             }
 1448:             if (get_tag_value(buf, sizeof(buf), line, "Bus=", " ") < 0) {
 1449:                 goto fail;
 1450:             }
 1451:             bus_num = atoi(buf);
 1452:             if (get_tag_value(buf, sizeof(buf), line, "Dev#=", " ") < 0) {
 1453:                 goto fail;
 1454:             }
 1455:             addr = atoi(buf);
 1456:             if (get_tag_value(buf, sizeof(buf), line, "Spd=", " ") < 0) {
 1457:                 goto fail;
 1458:             }
 1459:             if (!strcmp(buf, "5000")) {
 1460:                 speed = USB_SPEED_SUPER;
 1461:             } else if (!strcmp(buf, "480")) {
 1462:                 speed = USB_SPEED_HIGH;
 1463:             } else if (!strcmp(buf, "1.5")) {
 1464:                 speed = USB_SPEED_LOW;
 1465:             } else {
 1466:                 speed = USB_SPEED_FULL;
 1467:             }
 1468:             product_name[0] = '\0';
 1469:             class_id = 0xff;
 1470:             device_count++;
 1471:             product_id = 0;
 1472:             vendor_id = 0;
 1473:         } else if (line[0] == 'P' && line[1] == ':') {
 1474:             if (get_tag_value(buf, sizeof(buf), line, "Vendor=", " ") < 0) {
 1475:                 goto fail;
 1476:             }
 1477:             vendor_id = strtoul(buf, NULL, 16);
 1478:             if (get_tag_value(buf, sizeof(buf), line, "ProdID=", " ") < 0) {
 1479:                 goto fail;
 1480:             }
 1481:             product_id = strtoul(buf, NULL, 16);
 1482:         } else if (line[0] == 'S' && line[1] == ':') {
 1483:             if (get_tag_value(buf, sizeof(buf), line, "Product=", "") < 0) {
 1484:                 goto fail;
 1485:             }
 1486:             pstrcpy(product_name, sizeof(product_name), buf);
 1487:         } else if (line[0] == 'D' && line[1] == ':') {
 1488:             if (get_tag_value(buf, sizeof(buf), line, "Cls=", " (") < 0) {
 1489:                 goto fail;
 1490:             }
 1491:             class_id = strtoul(buf, NULL, 16);
 1492:         }
 1493:     fail: ;
 1494:     }
 1495:     if (device_count && (vendor_id || product_id)) {
 1496:         /* Add the last device.  */
 1497:         ret = func(opaque, bus_num, addr, 0, class_id, vendor_id,
 1498:                    product_id, product_name, speed);
 1499:     }
 1500:  the_end:
 1501:     if (f) {
 1502:         fclose(f);
 1503:     }
 1504:     return ret;
 1505: }
 1506: 
 1507: /*
 1508:  * Read sys file-system device file
 1509:  *
 1510:  * @line address of buffer to put file contents in
 1511:  * @line_size size of line
 1512:  * @device_file path to device file (printf format string)
 1513:  * @device_name device being opened (inserted into device_file)
 1514:  *
 1515:  * @return 0 failed, 1 succeeded ('line' contains data)
 1516:  */
 1517: static int usb_host_read_file(char *line, size_t line_size,
 1518:                               const char *device_file, const char *device_name)
 1519: {
 1520:     FILE *f;
 1521:     int ret = 0;
 1522:     char filename[PATH_MAX];
 1523: 
 1524:     snprintf(filename, PATH_MAX, USBSYSBUS_PATH "/devices/%s/%s", device_name,
 1525:              device_file);
 1526:     f = fopen(filename, "r");
 1527:     if (f) {
 1528:         ret = fgets(line, line_size, f) != NULL;
 1529:         fclose(f);
 1530:     }
 1531: 
 1532:     return ret;
 1533: }
 1534: 
 1535: /*
 1536:  * Use /sys/bus/usb/devices/ directory to determine host's USB
 1537:  * devices.
 1538:  *
 1539:  * This code is based on Robert Schiele's original patches posted to
 1540:  * the Novell bug-tracker https://bugzilla.novell.com/show_bug.cgi?id=241950
 1541:  */
 1542: static int usb_host_scan_sys(void *opaque, USBScanFunc *func)
 1543: {
 1544:     DIR *dir = NULL;
 1545:     char line[1024];
 1546:     int bus_num, addr, speed, class_id, product_id, vendor_id;
 1547:     int ret = 0;
 1548:     char port[MAX_PORTLEN];
 1549:     char product_name[512];
 1550:     struct dirent *de;
 1551: 
 1552:     dir = opendir(USBSYSBUS_PATH "/devices");
 1553:     if (!dir) {
 1554:         perror("husb: cannot open devices directory");
 1555:         goto the_end;
 1556:     }
 1557: 
 1558:     while ((de = readdir(dir))) {
 1559:         if (de->d_name[0] != '.' && !strchr(de->d_name, ':')) {
 1560:             if (sscanf(de->d_name, "%d-%7[0-9.]", &bus_num, port) < 2) {
 1561:                 continue;
 1562:             }
 1563: 
 1564:             if (!usb_host_read_file(line, sizeof(line), "devnum", de->d_name)) {
 1565:                 goto the_end;
 1566:             }
 1567:             if (sscanf(line, "%d", &addr) != 1) {
 1568:                 goto the_end;
 1569:             }
 1570:             if (!usb_host_read_file(line, sizeof(line), "bDeviceClass",
 1571:                                     de->d_name)) {
 1572:                 goto the_end;
 1573:             }
 1574:             if (sscanf(line, "%x", &class_id) != 1) {
 1575:                 goto the_end;
 1576:             }
 1577: 
 1578:             if (!usb_host_read_file(line, sizeof(line), "idVendor",
 1579:                                     de->d_name)) {
 1580:                 goto the_end;
 1581:             }
 1582:             if (sscanf(line, "%x", &vendor_id) != 1) {
 1583:                 goto the_end;
 1584:             }
 1585:             if (!usb_host_read_file(line, sizeof(line), "idProduct",
 1586:                                     de->d_name)) {
 1587:                 goto the_end;
 1588:             }
 1589:             if (sscanf(line, "%x", &product_id) != 1) {
 1590:                 goto the_end;
 1591:             }
 1592:             if (!usb_host_read_file(line, sizeof(line), "product",
 1593:                                     de->d_name)) {
 1594:                 *product_name = 0;
 1595:             } else {
 1596:                 if (strlen(line) > 0) {
 1597:                     line[strlen(line) - 1] = '\0';
 1598:                 }
 1599:                 pstrcpy(product_name, sizeof(product_name), line);
 1600:             }
 1601: 
 1602:             if (!usb_host_read_file(line, sizeof(line), "speed", de->d_name)) {
 1603:                 goto the_end;
 1604:             }
 1605:             if (!strcmp(line, "5000\n")) {
 1606:                 speed = USB_SPEED_SUPER;
 1607:             } else if (!strcmp(line, "480\n")) {
 1608:                 speed = USB_SPEED_HIGH;
 1609:             } else if (!strcmp(line, "1.5\n")) {
 1610:                 speed = USB_SPEED_LOW;
 1611:             } else {
 1612:                 speed = USB_SPEED_FULL;
 1613:             }
 1614: 
 1615:             ret = func(opaque, bus_num, addr, port, class_id, vendor_id,
 1616:                        product_id, product_name, speed);
 1617:             if (ret) {
 1618:                 goto the_end;
 1619:             }
 1620:         }
 1621:     }
 1622:  the_end:
 1623:     if (dir) {
 1624:         closedir(dir);
 1625:     }
 1626:     return ret;
 1627: }
 1628: 
 1629: /*
 1630:  * Determine how to access the host's USB devices and call the
 1631:  * specific support function.
 1632:  */
 1633: static int usb_host_scan(void *opaque, USBScanFunc *func)
 1634: {
 1635:     Monitor *mon = cur_mon;
 1636:     FILE *f = NULL;
 1637:     DIR *dir = NULL;
 1638:     int ret = 0;
 1639:     const char *fs_type[] = {"unknown", "proc", "dev", "sys"};
 1640:     char devpath[PATH_MAX];
 1641: 
 1642:     /* only check the host once */
 1643:     if (!usb_fs_type) {
 1644:         dir = opendir(USBSYSBUS_PATH "/devices");
 1645:         if (dir) {
 1646:             /* devices found in /dev/bus/usb/ (yes - not a mistake!) */
 1647:             strcpy(devpath, USBDEVBUS_PATH);
 1648:             usb_fs_type = USB_FS_SYS;
 1649:             closedir(dir);
 1650:             DPRINTF(USBDBG_DEVOPENED, USBSYSBUS_PATH);
 1651:             goto found_devices;
 1652:         }
 1653:         f = fopen(USBPROCBUS_PATH "/devices", "r");
 1654:         if (f) {
 1655:             /* devices found in /proc/bus/usb/ */
 1656:             strcpy(devpath, USBPROCBUS_PATH);
 1657:             usb_fs_type = USB_FS_PROC;
 1658:             fclose(f);
 1659:             DPRINTF(USBDBG_DEVOPENED, USBPROCBUS_PATH);
 1660:             goto found_devices;
 1661:         }
 1662:         /* try additional methods if an access method hasn't been found yet */
 1663:         f = fopen(USBDEVBUS_PATH "/devices", "r");
 1664:         if (f) {
 1665:             /* devices found in /dev/bus/usb/ */
 1666:             strcpy(devpath, USBDEVBUS_PATH);
 1667:             usb_fs_type = USB_FS_DEV;
 1668:             fclose(f);
 1669:             DPRINTF(USBDBG_DEVOPENED, USBDEVBUS_PATH);
 1670:             goto found_devices;
 1671:         }
 1672:     found_devices:
 1673:         if (!usb_fs_type) {
 1674:             if (mon) {
 1675:                 monitor_printf(mon, "husb: unable to access USB devices\n");
 1676:             }
 1677:             return -ENOENT;
 1678:         }
 1679: 
 1680:         /* the module setting (used later for opening devices) */
 1681:         usb_host_device_path = qemu_mallocz(strlen(devpath)+1);
 1682:         strcpy(usb_host_device_path, devpath);
 1683:         if (mon) {
 1684:             monitor_printf(mon, "husb: using %s file-system with %s\n",
 1685:                            fs_type[usb_fs_type], usb_host_device_path);
 1686:         }
 1687:     }
 1688: 
 1689:     switch (usb_fs_type) {
 1690:     case USB_FS_PROC:
 1691:     case USB_FS_DEV:
 1692:         ret = usb_host_scan_dev(opaque, func);
 1693:         break;
 1694:     case USB_FS_SYS:
 1695:         ret = usb_host_scan_sys(opaque, func);
 1696:         break;
 1697:     default:
 1698:         ret = -EINVAL;
 1699:         break;
 1700:     }
 1701:     return ret;
 1702: }
 1703: 
 1704: static QEMUTimer *usb_auto_timer;
 1705: 
 1706: static int usb_host_auto_scan(void *opaque, int bus_num, int addr, char *port,
 1707:                               int class_id, int vendor_id, int product_id,
 1708:                               const char *product_name, int speed)
 1709: {
 1710:     struct USBAutoFilter *f;
 1711:     struct USBHostDevice *s;
 1712: 
 1713:     /* Ignore hubs */
 1714:     if (class_id == 9)
 1715:         return 0;
 1716: 
 1717:     QTAILQ_FOREACH(s, &hostdevs, next) {
 1718:         f = &s->match;
 1719: 
 1720:         if (f->bus_num > 0 && f->bus_num != bus_num) {
 1721:             continue;
 1722:         }
 1723:         if (f->addr > 0 && f->addr != addr) {
 1724:             continue;
 1725:         }
 1726:         if (f->port != NULL && (port == NULL || strcmp(f->port, port) != 0)) {
 1727:             continue;
 1728:         }
 1729: 
 1730:         if (f->vendor_id > 0 && f->vendor_id != vendor_id) {
 1731:             continue;
 1732:         }
 1733: 
 1734:         if (f->product_id > 0 && f->product_id != product_id) {
 1735:             continue;
 1736:         }
 1737:         /* We got a match */
 1738: 
 1739:         /* Already attached ? */
 1740:         if (s->fd != -1) {
 1741:             return 0;
 1742:         }
 1743:         DPRINTF("husb: auto open: bus_num %d addr %d\n", bus_num, addr);
 1744: 
 1745:         usb_host_open(s, bus_num, addr, port, product_name, speed);
 1746:         break;
 1747:     }
 1748: 
 1749:     return 0;
 1750: }
 1751: 
 1752: static void usb_host_auto_check(void *unused)
 1753: {
 1754:     struct USBHostDevice *s;
 1755:     int unconnected = 0;
 1756: 
 1757:     usb_host_scan(NULL, usb_host_auto_scan);
 1758: 
 1759:     QTAILQ_FOREACH(s, &hostdevs, next) {
 1760:         if (s->fd == -1) {
 1761:             unconnected++;
 1762:         }
 1763:     }
 1764: 
 1765:     if (unconnected == 0) {
 1766:         /* nothing to watch */
 1767:         if (usb_auto_timer) {
 1768:             qemu_del_timer(usb_auto_timer);
 1769:         }
 1770:         return;
 1771:     }
 1772: 
 1773:     if (!usb_auto_timer) {
 1774:         usb_auto_timer = qemu_new_timer_ms(rt_clock, usb_host_auto_check, NULL);
 1775:         if (!usb_auto_timer) {
 1776:             return;
 1777:         }
 1778:     }
 1779:     qemu_mod_timer(usb_auto_timer, qemu_get_clock_ms(rt_clock) + 2000);
 1780: }
 1781: 
 1782: /*
 1783:  * Autoconnect filter
 1784:  * Format:
 1785:  *    auto:bus:dev[:vid:pid]
 1786:  *    auto:bus.dev[:vid:pid]
 1787:  *
 1788:  *    bus  - bus number    (dec, * means any)
 1789:  *    dev  - device number (dec, * means any)
 1790:  *    vid  - vendor id     (hex, * means any)
 1791:  *    pid  - product id    (hex, * means any)
 1792:  *
 1793:  *    See 'lsusb' output.
 1794:  */
 1795: static int parse_filter(const char *spec, struct USBAutoFilter *f)
 1796: {
 1797:     enum { BUS, DEV, VID, PID, DONE };
 1798:     const char *p = spec;
 1799:     int i;
 1800: 
 1801:     f->bus_num    = 0;
 1802:     f->addr       = 0;
 1803:     f->vendor_id  = 0;
 1804:     f->product_id = 0;
 1805: 
 1806:     for (i = BUS; i < DONE; i++) {
 1807:         p = strpbrk(p, ":.");
 1808:         if (!p) {
 1809:             break;
 1810:         }
 1811:         p++;
 1812: 
 1813:         if (*p == '*') {
 1814:             continue;
 1815:         }
 1816:         switch(i) {
 1817:         case BUS: f->bus_num = strtol(p, NULL, 10);    break;
 1818:         case DEV: f->addr    = strtol(p, NULL, 10);    break;
 1819:         case VID: f->vendor_id  = strtol(p, NULL, 16); break;
 1820:         case PID: f->product_id = strtol(p, NULL, 16); break;
 1821:         }
 1822:     }
 1823: 
 1824:     if (i < DEV) {
 1825:         fprintf(stderr, "husb: invalid auto filter spec %s\n", spec);
 1826:         return -1;
 1827:     }
 1828: 
 1829:     return 0;
 1830: }
 1831: 
 1832: /**********************/
 1833: /* USB host device info */
 1834: 
 1835: struct usb_class_info {
 1836:     int class;
 1837:     const char *class_name;
 1838: };
 1839: 
 1840: static const struct usb_class_info usb_class_info[] = {
 1841:     { USB_CLASS_AUDIO, "Audio"},
 1842:     { USB_CLASS_COMM, "Communication"},
 1843:     { USB_CLASS_HID, "HID"},
 1844:     { USB_CLASS_HUB, "Hub" },
 1845:     { USB_CLASS_PHYSICAL, "Physical" },
 1846:     { USB_CLASS_PRINTER, "Printer" },
 1847:     { USB_CLASS_MASS_STORAGE, "Storage" },
 1848:     { USB_CLASS_CDC_DATA, "Data" },
 1849:     { USB_CLASS_APP_SPEC, "Application Specific" },
 1850:     { USB_CLASS_VENDOR_SPEC, "Vendor Specific" },
 1851:     { USB_CLASS_STILL_IMAGE, "Still Image" },
 1852:     { USB_CLASS_CSCID, "Smart Card" },
 1853:     { USB_CLASS_CONTENT_SEC, "Content Security" },
 1854:     { -1, NULL }
 1855: };
 1856: 
 1857: static const char *usb_class_str(uint8_t class)
 1858: {
 1859:     const struct usb_class_info *p;
 1860:     for(p = usb_class_info; p->class != -1; p++) {
 1861:         if (p->class == class) {
 1862:             break;
 1863:         }
 1864:     }
 1865:     return p->class_name;
 1866: }
 1867: 
 1868: static void usb_info_device(Monitor *mon, int bus_num, int addr, char *port,
 1869:                             int class_id, int vendor_id, int product_id,
 1870:                             const char *product_name,
 1871:                             int speed)
 1872: {
 1873:     const char *class_str, *speed_str;
 1874: 
 1875:     switch(speed) {
 1876:     case USB_SPEED_LOW:
 1877:         speed_str = "1.5";
 1878:         break;
 1879:     case USB_SPEED_FULL:
 1880:         speed_str = "12";
 1881:         break;
 1882:     case USB_SPEED_HIGH:
 1883:         speed_str = "480";
 1884:         break;
 1885:     case USB_SPEED_SUPER:
 1886:         speed_str = "5000";
 1887:         break;
 1888:     default:
 1889:         speed_str = "?";
 1890:         break;
 1891:     }
 1892: 
 1893:     monitor_printf(mon, "  Bus %d, Addr %d, Port %s, Speed %s Mb/s\n",
 1894:                    bus_num, addr, port, speed_str);
 1895:     class_str = usb_class_str(class_id);
 1896:     if (class_str) {
 1897:         monitor_printf(mon, "    %s:", class_str);
 1898:     } else {
 1899:         monitor_printf(mon, "    Class %02x:", class_id);
 1900:     }
 1901:     monitor_printf(mon, " USB device %04x:%04x", vendor_id, product_id);
 1902:     if (product_name[0] != '\0') {
 1903:         monitor_printf(mon, ", %s", product_name);
 1904:     }
 1905:     monitor_printf(mon, "\n");
 1906: }
 1907: 
 1908: static int usb_host_info_device(void *opaque, int bus_num, int addr,
 1909:                                 char *path, int class_id,
 1910:                                 int vendor_id, int product_id,
 1911:                                 const char *product_name,
 1912:                                 int speed)
 1913: {
 1914:     Monitor *mon = opaque;
 1915: 
 1916:     usb_info_device(mon, bus_num, addr, path, class_id, vendor_id, product_id,
 1917:                     product_name, speed);
 1918:     return 0;
 1919: }
 1920: 
 1921: static void dec2str(int val, char *str, size_t size)
 1922: {
 1923:     if (val == 0) {
 1924:         snprintf(str, size, "*");
 1925:     } else {
 1926:         snprintf(str, size, "%d", val);
 1927:     }
 1928: }
 1929: 
 1930: static void hex2str(int val, char *str, size_t size)
 1931: {
 1932:     if (val == 0) {
 1933:         snprintf(str, size, "*");
 1934:     } else {
 1935:         snprintf(str, size, "%04x", val);
 1936:     }
 1937: }
 1938: 
 1939: void usb_host_info(Monitor *mon)
 1940: {
 1941:     struct USBAutoFilter *f;
 1942:     struct USBHostDevice *s;
 1943: 
 1944:     usb_host_scan(mon, usb_host_info_device);
 1945: 
 1946:     if (QTAILQ_EMPTY(&hostdevs)) {
 1947:         return;
 1948:     }
 1949: 
 1950:     monitor_printf(mon, "  Auto filters:\n");
 1951:     QTAILQ_FOREACH(s, &hostdevs, next) {
 1952:         char bus[10], addr[10], vid[10], pid[10];
 1953:         f = &s->match;
 1954:         dec2str(f->bus_num, bus, sizeof(bus));
 1955:         dec2str(f->addr, addr, sizeof(addr));
 1956:         hex2str(f->vendor_id, vid, sizeof(vid));
 1957:         hex2str(f->product_id, pid, sizeof(pid));
 1958:         monitor_printf(mon, "    Bus %s, Addr %s, Port %s, ID %s:%s\n",
 1959:                        bus, addr, f->port ? f->port : "*", vid, pid);
 1960:     }
 1961: }

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