File:  [Qemu by Fabrice Bellard] / qemu / usb-linux.c
Revision 1.1.1.14 (vendor branch): download - view: text, annotated - select for diffs
Tue Apr 24 19:17:08 2018 UTC (3 years, 1 month ago) by root
Branches: qemu, MAIN
CVS tags: qemu1001, HEAD
qemu 1.0.1

    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: #include "trace.h"
   38: 
   39: #include <dirent.h>
   40: #include <sys/ioctl.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: typedef int USBScanFunc(void *opaque, int bus_num, int addr, const char *port,
   58:                         int class_id, int vendor_id, int product_id,
   59:                         const char *product_name, int speed);
   60: 
   61: //#define DEBUG
   62: 
   63: #ifdef DEBUG
   64: #define DPRINTF printf
   65: #else
   66: #define DPRINTF(...)
   67: #endif
   68: 
   69: #define USBDBG_DEVOPENED "husb: opened %s/devices\n"
   70: 
   71: #define USBPROCBUS_PATH "/proc/bus/usb"
   72: #define PRODUCT_NAME_SZ 32
   73: #define MAX_ENDPOINTS 15
   74: #define MAX_PORTLEN 16
   75: #define USBDEVBUS_PATH "/dev/bus/usb"
   76: #define USBSYSBUS_PATH "/sys/bus/usb"
   77: 
   78: static char *usb_host_device_path;
   79: 
   80: #define USB_FS_NONE 0
   81: #define USB_FS_PROC 1
   82: #define USB_FS_DEV 2
   83: #define USB_FS_SYS 3
   84: 
   85: static int usb_fs_type;
   86: 
   87: /* endpoint association data */
   88: #define ISO_FRAME_DESC_PER_URB 32
   89: #define INVALID_EP_TYPE 255
   90: 
   91: /* devio.c limits single requests to 16k */
   92: #define MAX_USBFS_BUFFER_SIZE 16384
   93: 
   94: typedef struct AsyncURB AsyncURB;
   95: 
   96: struct endp_data {
   97:     uint8_t type;
   98:     uint8_t halted;
   99:     uint8_t iso_started;
  100:     AsyncURB *iso_urb;
  101:     int iso_urb_idx;
  102:     int iso_buffer_used;
  103:     int max_packet_size;
  104:     int inflight;
  105: };
  106: 
  107: struct USBAutoFilter {
  108:     uint32_t bus_num;
  109:     uint32_t addr;
  110:     char     *port;
  111:     uint32_t vendor_id;
  112:     uint32_t product_id;
  113: };
  114: 
  115: typedef struct USBHostDevice {
  116:     USBDevice dev;
  117:     int       fd;
  118:     int       hub_fd;
  119:     int       hub_port;
  120: 
  121:     uint8_t   descr[8192];
  122:     int       descr_len;
  123:     int       configuration;
  124:     int       ninterfaces;
  125:     int       closing;
  126:     uint32_t  iso_urb_count;
  127:     Notifier  exit;
  128: 
  129:     struct endp_data ep_in[MAX_ENDPOINTS];
  130:     struct endp_data ep_out[MAX_ENDPOINTS];
  131:     QLIST_HEAD(, AsyncURB) aurbs;
  132: 
  133:     /* Host side address */
  134:     int bus_num;
  135:     int addr;
  136:     char port[MAX_PORTLEN];
  137:     struct USBAutoFilter match;
  138:     int seen, errcount;
  139: 
  140:     QTAILQ_ENTRY(USBHostDevice) next;
  141: } USBHostDevice;
  142: 
  143: static QTAILQ_HEAD(, USBHostDevice) hostdevs = QTAILQ_HEAD_INITIALIZER(hostdevs);
  144: 
  145: static int usb_host_close(USBHostDevice *dev);
  146: static int parse_filter(const char *spec, struct USBAutoFilter *f);
  147: static void usb_host_auto_check(void *unused);
  148: static int usb_host_read_file(char *line, size_t line_size,
  149:                             const char *device_file, const char *device_name);
  150: static int usb_linux_update_endp_table(USBHostDevice *s);
  151: 
  152: static int usb_host_do_reset(USBHostDevice *dev)
  153: {
  154:     struct timeval s, e;
  155:     uint32_t usecs;
  156:     int ret;
  157: 
  158:     gettimeofday(&s, NULL);
  159:     ret = ioctl(dev->fd, USBDEVFS_RESET);
  160:     gettimeofday(&e, NULL);
  161:     usecs = (e.tv_sec  - s.tv_sec) * 1000000;
  162:     usecs += e.tv_usec - s.tv_usec;
  163:     if (usecs > 1000000) {
  164:         /* more than a second, something is fishy, broken usb device? */
  165:         fprintf(stderr, "husb: device %d:%d reset took %d.%06d seconds\n",
  166:                 dev->bus_num, dev->addr, usecs / 1000000, usecs % 1000000);
  167:     }
  168:     return ret;
  169: }
  170: 
  171: static struct endp_data *get_endp(USBHostDevice *s, int pid, int ep)
  172: {
  173:     struct endp_data *eps = pid == USB_TOKEN_IN ? s->ep_in : s->ep_out;
  174:     assert(pid == USB_TOKEN_IN || pid == USB_TOKEN_OUT);
  175:     assert(ep > 0 && ep <= MAX_ENDPOINTS);
  176:     return eps + ep - 1;
  177: }
  178: 
  179: static int is_isoc(USBHostDevice *s, int pid, int ep)
  180: {
  181:     return get_endp(s, pid, ep)->type == USBDEVFS_URB_TYPE_ISO;
  182: }
  183: 
  184: static int is_valid(USBHostDevice *s, int pid, int ep)
  185: {
  186:     return get_endp(s, pid, ep)->type != INVALID_EP_TYPE;
  187: }
  188: 
  189: static int is_halted(USBHostDevice *s, int pid, int ep)
  190: {
  191:     return get_endp(s, pid, ep)->halted;
  192: }
  193: 
  194: static void clear_halt(USBHostDevice *s, int pid, int ep)
  195: {
  196:     trace_usb_host_ep_clear_halt(s->bus_num, s->addr, ep);
  197:     get_endp(s, pid, ep)->halted = 0;
  198: }
  199: 
  200: static void set_halt(USBHostDevice *s, int pid, int ep)
  201: {
  202:     if (ep != 0) {
  203:         trace_usb_host_ep_set_halt(s->bus_num, s->addr, ep);
  204:         get_endp(s, pid, ep)->halted = 1;
  205:     }
  206: }
  207: 
  208: static int is_iso_started(USBHostDevice *s, int pid, int ep)
  209: {
  210:     return get_endp(s, pid, ep)->iso_started;
  211: }
  212: 
  213: static void clear_iso_started(USBHostDevice *s, int pid, int ep)
  214: {
  215:     trace_usb_host_ep_stop_iso(s->bus_num, s->addr, ep);
  216:     get_endp(s, pid, ep)->iso_started = 0;
  217: }
  218: 
  219: static void set_iso_started(USBHostDevice *s, int pid, int ep)
  220: {
  221:     struct endp_data *e = get_endp(s, pid, ep);
  222: 
  223:     trace_usb_host_ep_start_iso(s->bus_num, s->addr, ep);
  224:     if (!e->iso_started) {
  225:         e->iso_started = 1;
  226:         e->inflight = 0;
  227:     }
  228: }
  229: 
  230: static int change_iso_inflight(USBHostDevice *s, int pid, int ep, int value)
  231: {
  232:     struct endp_data *e = get_endp(s, pid, ep);
  233: 
  234:     e->inflight += value;
  235:     return e->inflight;
  236: }
  237: 
  238: static void set_iso_urb(USBHostDevice *s, int pid, int ep, AsyncURB *iso_urb)
  239: {
  240:     get_endp(s, pid, ep)->iso_urb = iso_urb;
  241: }
  242: 
  243: static AsyncURB *get_iso_urb(USBHostDevice *s, int pid, int ep)
  244: {
  245:     return get_endp(s, pid, ep)->iso_urb;
  246: }
  247: 
  248: static void set_iso_urb_idx(USBHostDevice *s, int pid, int ep, int i)
  249: {
  250:     get_endp(s, pid, ep)->iso_urb_idx = i;
  251: }
  252: 
  253: static int get_iso_urb_idx(USBHostDevice *s, int pid, int ep)
  254: {
  255:     return get_endp(s, pid, ep)->iso_urb_idx;
  256: }
  257: 
  258: static void set_iso_buffer_used(USBHostDevice *s, int pid, int ep, int i)
  259: {
  260:     get_endp(s, pid, ep)->iso_buffer_used = i;
  261: }
  262: 
  263: static int get_iso_buffer_used(USBHostDevice *s, int pid, int ep)
  264: {
  265:     return get_endp(s, pid, ep)->iso_buffer_used;
  266: }
  267: 
  268: static void set_max_packet_size(USBHostDevice *s, int pid, int ep,
  269:                                 uint8_t *descriptor)
  270: {
  271:     int raw = descriptor[4] + (descriptor[5] << 8);
  272:     int size, microframes;
  273: 
  274:     size = raw & 0x7ff;
  275:     switch ((raw >> 11) & 3) {
  276:     case 1:  microframes = 2; break;
  277:     case 2:  microframes = 3; break;
  278:     default: microframes = 1; break;
  279:     }
  280:     get_endp(s, pid, ep)->max_packet_size = size * microframes;
  281: }
  282: 
  283: static int get_max_packet_size(USBHostDevice *s, int pid, int ep)
  284: {
  285:     return get_endp(s, pid, ep)->max_packet_size;
  286: }
  287: 
  288: /*
  289:  * Async URB state.
  290:  * We always allocate iso packet descriptors even for bulk transfers
  291:  * to simplify allocation and casts.
  292:  */
  293: struct AsyncURB
  294: {
  295:     struct usbdevfs_urb urb;
  296:     struct usbdevfs_iso_packet_desc isocpd[ISO_FRAME_DESC_PER_URB];
  297:     USBHostDevice *hdev;
  298:     QLIST_ENTRY(AsyncURB) next;
  299: 
  300:     /* For regular async urbs */
  301:     USBPacket     *packet;
  302:     int more; /* large transfer, more urbs follow */
  303: 
  304:     /* For buffered iso handling */
  305:     int iso_frame_idx; /* -1 means in flight */
  306: };
  307: 
  308: static AsyncURB *async_alloc(USBHostDevice *s)
  309: {
  310:     AsyncURB *aurb = g_malloc0(sizeof(AsyncURB));
  311:     aurb->hdev = s;
  312:     QLIST_INSERT_HEAD(&s->aurbs, aurb, next);
  313:     return aurb;
  314: }
  315: 
  316: static void async_free(AsyncURB *aurb)
  317: {
  318:     QLIST_REMOVE(aurb, next);
  319:     g_free(aurb);
  320: }
  321: 
  322: static void do_disconnect(USBHostDevice *s)
  323: {
  324:     usb_host_close(s);
  325:     usb_host_auto_check(NULL);
  326: }
  327: 
  328: static void async_complete(void *opaque)
  329: {
  330:     USBHostDevice *s = opaque;
  331:     AsyncURB *aurb;
  332:     int urbs = 0;
  333: 
  334:     while (1) {
  335:         USBPacket *p;
  336: 
  337:         int r = ioctl(s->fd, USBDEVFS_REAPURBNDELAY, &aurb);
  338:         if (r < 0) {
  339:             if (errno == EAGAIN) {
  340:                 if (urbs > 2) {
  341:                     fprintf(stderr, "husb: %d iso urbs finished at once\n", urbs);
  342:                 }
  343:                 return;
  344:             }
  345:             if (errno == ENODEV) {
  346:                 if (!s->closing) {
  347:                     trace_usb_host_disconnect(s->bus_num, s->addr);
  348:                     do_disconnect(s);
  349:                 }
  350:                 return;
  351:             }
  352: 
  353:             perror("USBDEVFS_REAPURBNDELAY");
  354:             return;
  355:         }
  356: 
  357:         DPRINTF("husb: async completed. aurb %p status %d alen %d\n",
  358:                 aurb, aurb->urb.status, aurb->urb.actual_length);
  359: 
  360:         /* If this is a buffered iso urb mark it as complete and don't do
  361:            anything else (it is handled further in usb_host_handle_iso_data) */
  362:         if (aurb->iso_frame_idx == -1) {
  363:             int inflight;
  364:             int pid = (aurb->urb.endpoint & USB_DIR_IN) ?
  365:                 USB_TOKEN_IN : USB_TOKEN_OUT;
  366:             int ep = aurb->urb.endpoint & 0xf;
  367:             if (aurb->urb.status == -EPIPE) {
  368:                 set_halt(s, pid, ep);
  369:             }
  370:             aurb->iso_frame_idx = 0;
  371:             urbs++;
  372:             inflight = change_iso_inflight(s, pid, ep, -1);
  373:             if (inflight == 0 && is_iso_started(s, pid, ep)) {
  374:                 fprintf(stderr, "husb: out of buffers for iso stream\n");
  375:             }
  376:             continue;
  377:         }
  378: 
  379:         p = aurb->packet;
  380:         trace_usb_host_urb_complete(s->bus_num, s->addr, aurb, aurb->urb.status,
  381:                                     aurb->urb.actual_length, aurb->more);
  382: 
  383:         if (p) {
  384:             switch (aurb->urb.status) {
  385:             case 0:
  386:                 p->result += aurb->urb.actual_length;
  387:                 break;
  388: 
  389:             case -EPIPE:
  390:                 set_halt(s, p->pid, p->devep);
  391:                 p->result = USB_RET_STALL;
  392:                 break;
  393: 
  394:             default:
  395:                 p->result = USB_RET_NAK;
  396:                 break;
  397:             }
  398: 
  399:             if (aurb->urb.type == USBDEVFS_URB_TYPE_CONTROL) {
  400:                 trace_usb_host_req_complete(s->bus_num, s->addr, p->result);
  401:                 usb_generic_async_ctrl_complete(&s->dev, p);
  402:             } else if (!aurb->more) {
  403:                 trace_usb_host_req_complete(s->bus_num, s->addr, p->result);
  404:                 usb_packet_complete(&s->dev, p);
  405:             }
  406:         }
  407: 
  408:         async_free(aurb);
  409:     }
  410: }
  411: 
  412: static void usb_host_async_cancel(USBDevice *dev, USBPacket *p)
  413: {
  414:     USBHostDevice *s = DO_UPCAST(USBHostDevice, dev, dev);
  415:     AsyncURB *aurb;
  416: 
  417:     QLIST_FOREACH(aurb, &s->aurbs, next) {
  418:         if (p != aurb->packet) {
  419:             continue;
  420:         }
  421: 
  422:         DPRINTF("husb: async cancel: packet %p, aurb %p\n", p, aurb);
  423: 
  424:         /* Mark it as dead (see async_complete above) */
  425:         aurb->packet = NULL;
  426: 
  427:         int r = ioctl(s->fd, USBDEVFS_DISCARDURB, aurb);
  428:         if (r < 0) {
  429:             DPRINTF("husb: async. discard urb failed errno %d\n", errno);
  430:         }
  431:     }
  432: }
  433: 
  434: static int usb_host_claim_port(USBHostDevice *s)
  435: {
  436: #ifdef USBDEVFS_CLAIM_PORT
  437:     char *h, hub_name[64], line[1024];
  438:     int hub_addr, ret;
  439: 
  440:     snprintf(hub_name, sizeof(hub_name), "%d-%s",
  441:              s->match.bus_num, s->match.port);
  442: 
  443:     /* try strip off last ".$portnr" to get hub */
  444:     h = strrchr(hub_name, '.');
  445:     if (h != NULL) {
  446:         s->hub_port = atoi(h+1);
  447:         *h = '\0';
  448:     } else {
  449:         /* no dot in there -> it is the root hub */
  450:         snprintf(hub_name, sizeof(hub_name), "usb%d",
  451:                  s->match.bus_num);
  452:         s->hub_port = atoi(s->match.port);
  453:     }
  454: 
  455:     if (!usb_host_read_file(line, sizeof(line), "devnum",
  456:                             hub_name)) {
  457:         return -1;
  458:     }
  459:     if (sscanf(line, "%d", &hub_addr) != 1) {
  460:         return -1;
  461:     }
  462: 
  463:     if (!usb_host_device_path) {
  464:         return -1;
  465:     }
  466:     snprintf(line, sizeof(line), "%s/%03d/%03d",
  467:              usb_host_device_path, s->match.bus_num, hub_addr);
  468:     s->hub_fd = open(line, O_RDWR | O_NONBLOCK);
  469:     if (s->hub_fd < 0) {
  470:         return -1;
  471:     }
  472: 
  473:     ret = ioctl(s->hub_fd, USBDEVFS_CLAIM_PORT, &s->hub_port);
  474:     if (ret < 0) {
  475:         close(s->hub_fd);
  476:         s->hub_fd = -1;
  477:         return -1;
  478:     }
  479: 
  480:     trace_usb_host_claim_port(s->match.bus_num, hub_addr, s->hub_port);
  481:     return 0;
  482: #else
  483:     return -1;
  484: #endif
  485: }
  486: 
  487: static void usb_host_release_port(USBHostDevice *s)
  488: {
  489:     if (s->hub_fd == -1) {
  490:         return;
  491:     }
  492: #ifdef USBDEVFS_RELEASE_PORT
  493:     ioctl(s->hub_fd, USBDEVFS_RELEASE_PORT, &s->hub_port);
  494: #endif
  495:     close(s->hub_fd);
  496:     s->hub_fd = -1;
  497: }
  498: 
  499: static int usb_host_disconnect_ifaces(USBHostDevice *dev, int nb_interfaces)
  500: {
  501:     /* earlier Linux 2.4 do not support that */
  502: #ifdef USBDEVFS_DISCONNECT
  503:     struct usbdevfs_ioctl ctrl;
  504:     int ret, interface;
  505: 
  506:     for (interface = 0; interface < nb_interfaces; interface++) {
  507:         ctrl.ioctl_code = USBDEVFS_DISCONNECT;
  508:         ctrl.ifno = interface;
  509:         ctrl.data = 0;
  510:         ret = ioctl(dev->fd, USBDEVFS_IOCTL, &ctrl);
  511:         if (ret < 0 && errno != ENODATA) {
  512:             perror("USBDEVFS_DISCONNECT");
  513:             return -1;
  514:         }
  515:     }
  516: #endif
  517:     return 0;
  518: }
  519: 
  520: static int usb_linux_get_num_interfaces(USBHostDevice *s)
  521: {
  522:     char device_name[64], line[1024];
  523:     int num_interfaces = 0;
  524: 
  525:     if (usb_fs_type != USB_FS_SYS) {
  526:         return -1;
  527:     }
  528: 
  529:     sprintf(device_name, "%d-%s", s->bus_num, s->port);
  530:     if (!usb_host_read_file(line, sizeof(line), "bNumInterfaces",
  531:                             device_name)) {
  532:         return -1;
  533:     }
  534:     if (sscanf(line, "%d", &num_interfaces) != 1) {
  535:         return -1;
  536:     }
  537:     return num_interfaces;
  538: }
  539: 
  540: static int usb_host_claim_interfaces(USBHostDevice *dev, int configuration)
  541: {
  542:     const char *op = NULL;
  543:     int dev_descr_len, config_descr_len;
  544:     int interface, nb_interfaces;
  545:     int ret, i;
  546: 
  547:     if (configuration == 0) { /* address state - ignore */
  548:         dev->ninterfaces   = 0;
  549:         dev->configuration = 0;
  550:         return 1;
  551:     }
  552: 
  553:     DPRINTF("husb: claiming interfaces. config %d\n", configuration);
  554: 
  555:     i = 0;
  556:     dev_descr_len = dev->descr[0];
  557:     if (dev_descr_len > dev->descr_len) {
  558:         fprintf(stderr, "husb: update iface failed. descr too short\n");
  559:         return 0;
  560:     }
  561: 
  562:     i += dev_descr_len;
  563:     while (i < dev->descr_len) {
  564:         DPRINTF("husb: i is %d, descr_len is %d, dl %d, dt %d\n",
  565:                 i, dev->descr_len,
  566:                dev->descr[i], dev->descr[i+1]);
  567: 
  568:         if (dev->descr[i+1] != USB_DT_CONFIG) {
  569:             i += dev->descr[i];
  570:             continue;
  571:         }
  572:         config_descr_len = dev->descr[i];
  573: 
  574:         DPRINTF("husb: config #%d need %d\n", dev->descr[i + 5], configuration);
  575: 
  576:         if (configuration == dev->descr[i + 5]) {
  577:             configuration = dev->descr[i + 5];
  578:             break;
  579:         }
  580: 
  581:         i += config_descr_len;
  582:     }
  583: 
  584:     if (i >= dev->descr_len) {
  585:         fprintf(stderr,
  586:                 "husb: update iface failed. no matching configuration\n");
  587:         return 0;
  588:     }
  589:     nb_interfaces = dev->descr[i + 4];
  590: 
  591:     if (usb_host_disconnect_ifaces(dev, nb_interfaces) < 0) {
  592:         goto fail;
  593:     }
  594: 
  595:     /* XXX: only grab if all interfaces are free */
  596:     for (interface = 0; interface < nb_interfaces; interface++) {
  597:         op = "USBDEVFS_CLAIMINTERFACE";
  598:         ret = ioctl(dev->fd, USBDEVFS_CLAIMINTERFACE, &interface);
  599:         if (ret < 0) {
  600:             goto fail;
  601:         }
  602:     }
  603: 
  604:     trace_usb_host_claim_interfaces(dev->bus_num, dev->addr,
  605:                                     nb_interfaces, configuration);
  606: 
  607:     dev->ninterfaces   = nb_interfaces;
  608:     dev->configuration = configuration;
  609:     return 1;
  610: 
  611: fail:
  612:     if (errno == ENODEV) {
  613:         do_disconnect(dev);
  614:     }
  615:     perror(op);
  616:     return 0;
  617: }
  618: 
  619: static int usb_host_release_interfaces(USBHostDevice *s)
  620: {
  621:     int ret, i;
  622: 
  623:     trace_usb_host_release_interfaces(s->bus_num, s->addr);
  624: 
  625:     for (i = 0; i < s->ninterfaces; i++) {
  626:         ret = ioctl(s->fd, USBDEVFS_RELEASEINTERFACE, &i);
  627:         if (ret < 0) {
  628:             perror("USBDEVFS_RELEASEINTERFACE");
  629:             return 0;
  630:         }
  631:     }
  632:     return 1;
  633: }
  634: 
  635: static void usb_host_handle_reset(USBDevice *dev)
  636: {
  637:     USBHostDevice *s = DO_UPCAST(USBHostDevice, dev, dev);
  638: 
  639:     trace_usb_host_reset(s->bus_num, s->addr);
  640: 
  641:     usb_host_do_reset(s);;
  642: 
  643:     usb_host_claim_interfaces(s, 0);
  644:     usb_linux_update_endp_table(s);
  645: }
  646: 
  647: static void usb_host_handle_destroy(USBDevice *dev)
  648: {
  649:     USBHostDevice *s = (USBHostDevice *)dev;
  650: 
  651:     usb_host_release_port(s);
  652:     usb_host_close(s);
  653:     QTAILQ_REMOVE(&hostdevs, s, next);
  654:     qemu_remove_exit_notifier(&s->exit);
  655: }
  656: 
  657: /* iso data is special, we need to keep enough urbs in flight to make sure
  658:    that the controller never runs out of them, otherwise the device will
  659:    likely suffer a buffer underrun / overrun. */
  660: static AsyncURB *usb_host_alloc_iso(USBHostDevice *s, int pid, uint8_t ep)
  661: {
  662:     AsyncURB *aurb;
  663:     int i, j, len = get_max_packet_size(s, pid, ep);
  664: 
  665:     aurb = g_malloc0(s->iso_urb_count * sizeof(*aurb));
  666:     for (i = 0; i < s->iso_urb_count; i++) {
  667:         aurb[i].urb.endpoint      = ep;
  668:         aurb[i].urb.buffer_length = ISO_FRAME_DESC_PER_URB * len;
  669:         aurb[i].urb.buffer        = g_malloc(aurb[i].urb.buffer_length);
  670:         aurb[i].urb.type          = USBDEVFS_URB_TYPE_ISO;
  671:         aurb[i].urb.flags         = USBDEVFS_URB_ISO_ASAP;
  672:         aurb[i].urb.number_of_packets = ISO_FRAME_DESC_PER_URB;
  673:         for (j = 0 ; j < ISO_FRAME_DESC_PER_URB; j++)
  674:             aurb[i].urb.iso_frame_desc[j].length = len;
  675:         if (pid == USB_TOKEN_IN) {
  676:             aurb[i].urb.endpoint |= 0x80;
  677:             /* Mark as fully consumed (idle) */
  678:             aurb[i].iso_frame_idx = ISO_FRAME_DESC_PER_URB;
  679:         }
  680:     }
  681:     set_iso_urb(s, pid, ep, aurb);
  682: 
  683:     return aurb;
  684: }
  685: 
  686: static void usb_host_stop_n_free_iso(USBHostDevice *s, int pid, uint8_t ep)
  687: {
  688:     AsyncURB *aurb;
  689:     int i, ret, killed = 0, free = 1;
  690: 
  691:     aurb = get_iso_urb(s, pid, ep);
  692:     if (!aurb) {
  693:         return;
  694:     }
  695: 
  696:     for (i = 0; i < s->iso_urb_count; i++) {
  697:         /* in flight? */
  698:         if (aurb[i].iso_frame_idx == -1) {
  699:             ret = ioctl(s->fd, USBDEVFS_DISCARDURB, &aurb[i]);
  700:             if (ret < 0) {
  701:                 perror("USBDEVFS_DISCARDURB");
  702:                 free = 0;
  703:                 continue;
  704:             }
  705:             killed++;
  706:         }
  707:     }
  708: 
  709:     /* Make sure any urbs we've killed are reaped before we free them */
  710:     if (killed) {
  711:         async_complete(s);
  712:     }
  713: 
  714:     for (i = 0; i < s->iso_urb_count; i++) {
  715:         g_free(aurb[i].urb.buffer);
  716:     }
  717: 
  718:     if (free)
  719:         g_free(aurb);
  720:     else
  721:         printf("husb: leaking iso urbs because of discard failure\n");
  722:     set_iso_urb(s, pid, ep, NULL);
  723:     set_iso_urb_idx(s, pid, ep, 0);
  724:     clear_iso_started(s, pid, ep);
  725: }
  726: 
  727: static int urb_status_to_usb_ret(int status)
  728: {
  729:     switch (status) {
  730:     case -EPIPE:
  731:         return USB_RET_STALL;
  732:     default:
  733:         return USB_RET_NAK;
  734:     }
  735: }
  736: 
  737: static int usb_host_handle_iso_data(USBHostDevice *s, USBPacket *p, int in)
  738: {
  739:     AsyncURB *aurb;
  740:     int i, j, ret, max_packet_size, offset, len = 0;
  741:     uint8_t *buf;
  742: 
  743:     max_packet_size = get_max_packet_size(s, p->pid, p->devep);
  744:     if (max_packet_size == 0)
  745:         return USB_RET_NAK;
  746: 
  747:     aurb = get_iso_urb(s, p->pid, p->devep);
  748:     if (!aurb) {
  749:         aurb = usb_host_alloc_iso(s, p->pid, p->devep);
  750:     }
  751: 
  752:     i = get_iso_urb_idx(s, p->pid, p->devep);
  753:     j = aurb[i].iso_frame_idx;
  754:     if (j >= 0 && j < ISO_FRAME_DESC_PER_URB) {
  755:         if (in) {
  756:             /* Check urb status  */
  757:             if (aurb[i].urb.status) {
  758:                 len = urb_status_to_usb_ret(aurb[i].urb.status);
  759:                 /* Move to the next urb */
  760:                 aurb[i].iso_frame_idx = ISO_FRAME_DESC_PER_URB - 1;
  761:             /* Check frame status */
  762:             } else if (aurb[i].urb.iso_frame_desc[j].status) {
  763:                 len = urb_status_to_usb_ret(
  764:                                         aurb[i].urb.iso_frame_desc[j].status);
  765:             /* Check the frame fits */
  766:             } else if (aurb[i].urb.iso_frame_desc[j].actual_length
  767:                        > p->iov.size) {
  768:                 printf("husb: received iso data is larger then packet\n");
  769:                 len = USB_RET_NAK;
  770:             /* All good copy data over */
  771:             } else {
  772:                 len = aurb[i].urb.iso_frame_desc[j].actual_length;
  773:                 buf  = aurb[i].urb.buffer +
  774:                     j * aurb[i].urb.iso_frame_desc[0].length;
  775:                 usb_packet_copy(p, buf, len);
  776:             }
  777:         } else {
  778:             len = p->iov.size;
  779:             offset = (j == 0) ? 0 : get_iso_buffer_used(s, p->pid, p->devep);
  780: 
  781:             /* Check the frame fits */
  782:             if (len > max_packet_size) {
  783:                 printf("husb: send iso data is larger then max packet size\n");
  784:                 return USB_RET_NAK;
  785:             }
  786: 
  787:             /* All good copy data over */
  788:             usb_packet_copy(p, aurb[i].urb.buffer + offset, len);
  789:             aurb[i].urb.iso_frame_desc[j].length = len;
  790:             offset += len;
  791:             set_iso_buffer_used(s, p->pid, p->devep, offset);
  792: 
  793:             /* Start the stream once we have buffered enough data */
  794:             if (!is_iso_started(s, p->pid, p->devep) && i == 1 && j == 8) {
  795:                 set_iso_started(s, p->pid, p->devep);
  796:             }
  797:         }
  798:         aurb[i].iso_frame_idx++;
  799:         if (aurb[i].iso_frame_idx == ISO_FRAME_DESC_PER_URB) {
  800:             i = (i + 1) % s->iso_urb_count;
  801:             set_iso_urb_idx(s, p->pid, p->devep, i);
  802:         }
  803:     } else {
  804:         if (in) {
  805:             set_iso_started(s, p->pid, p->devep);
  806:         } else {
  807:             DPRINTF("hubs: iso out error no free buffer, dropping packet\n");
  808:         }
  809:     }
  810: 
  811:     if (is_iso_started(s, p->pid, p->devep)) {
  812:         /* (Re)-submit all fully consumed / filled urbs */
  813:         for (i = 0; i < s->iso_urb_count; i++) {
  814:             if (aurb[i].iso_frame_idx == ISO_FRAME_DESC_PER_URB) {
  815:                 ret = ioctl(s->fd, USBDEVFS_SUBMITURB, &aurb[i]);
  816:                 if (ret < 0) {
  817:                     perror("USBDEVFS_SUBMITURB");
  818:                     if (!in || len == 0) {
  819:                         switch(errno) {
  820:                         case ETIMEDOUT:
  821:                             len = USB_RET_NAK;
  822:                             break;
  823:                         case EPIPE:
  824:                         default:
  825:                             len = USB_RET_STALL;
  826:                         }
  827:                     }
  828:                     break;
  829:                 }
  830:                 aurb[i].iso_frame_idx = -1;
  831:                 change_iso_inflight(s, p->pid, p->devep, 1);
  832:             }
  833:         }
  834:     }
  835: 
  836:     return len;
  837: }
  838: 
  839: static int usb_host_handle_data(USBDevice *dev, USBPacket *p)
  840: {
  841:     USBHostDevice *s = DO_UPCAST(USBHostDevice, dev, dev);
  842:     struct usbdevfs_urb *urb;
  843:     AsyncURB *aurb;
  844:     int ret, rem, prem, v;
  845:     uint8_t *pbuf;
  846:     uint8_t ep;
  847: 
  848:     trace_usb_host_req_data(s->bus_num, s->addr,
  849:                             p->pid == USB_TOKEN_IN,
  850:                             p->devep, p->iov.size);
  851: 
  852:     if (!is_valid(s, p->pid, p->devep)) {
  853:         trace_usb_host_req_complete(s->bus_num, s->addr, USB_RET_NAK);
  854:         return USB_RET_NAK;
  855:     }
  856: 
  857:     if (p->pid == USB_TOKEN_IN) {
  858:         ep = p->devep | 0x80;
  859:     } else {
  860:         ep = p->devep;
  861:     }
  862: 
  863:     if (is_halted(s, p->pid, p->devep)) {
  864:         unsigned int arg = ep;
  865:         ret = ioctl(s->fd, USBDEVFS_CLEAR_HALT, &arg);
  866:         if (ret < 0) {
  867:             perror("USBDEVFS_CLEAR_HALT");
  868:             trace_usb_host_req_complete(s->bus_num, s->addr, USB_RET_NAK);
  869:             return USB_RET_NAK;
  870:         }
  871:         clear_halt(s, p->pid, p->devep);
  872:     }
  873: 
  874:     if (is_isoc(s, p->pid, p->devep)) {
  875:         return usb_host_handle_iso_data(s, p, p->pid == USB_TOKEN_IN);
  876:     }
  877: 
  878:     v = 0;
  879:     prem = p->iov.iov[v].iov_len;
  880:     pbuf = p->iov.iov[v].iov_base;
  881:     rem = p->iov.size;
  882:     while (rem) {
  883:         if (prem == 0) {
  884:             v++;
  885:             assert(v < p->iov.niov);
  886:             prem = p->iov.iov[v].iov_len;
  887:             pbuf = p->iov.iov[v].iov_base;
  888:             assert(prem <= rem);
  889:         }
  890:         aurb = async_alloc(s);
  891:         aurb->packet = p;
  892: 
  893:         urb = &aurb->urb;
  894:         urb->endpoint      = ep;
  895:         urb->type          = USBDEVFS_URB_TYPE_BULK;
  896:         urb->usercontext   = s;
  897:         urb->buffer        = pbuf;
  898:         urb->buffer_length = prem;
  899: 
  900:         if (urb->buffer_length > MAX_USBFS_BUFFER_SIZE) {
  901:             urb->buffer_length = MAX_USBFS_BUFFER_SIZE;
  902:         }
  903:         pbuf += urb->buffer_length;
  904:         prem -= urb->buffer_length;
  905:         rem  -= urb->buffer_length;
  906:         if (rem) {
  907:             aurb->more         = 1;
  908:         }
  909: 
  910:         trace_usb_host_urb_submit(s->bus_num, s->addr, aurb,
  911:                                   urb->buffer_length, aurb->more);
  912:         ret = ioctl(s->fd, USBDEVFS_SUBMITURB, urb);
  913: 
  914:         DPRINTF("husb: data submit: ep 0x%x, len %u, more %d, packet %p, aurb %p\n",
  915:                 urb->endpoint, urb->buffer_length, aurb->more, p, aurb);
  916: 
  917:         if (ret < 0) {
  918:             perror("USBDEVFS_SUBMITURB");
  919:             async_free(aurb);
  920: 
  921:             switch(errno) {
  922:             case ETIMEDOUT:
  923:                 trace_usb_host_req_complete(s->bus_num, s->addr, USB_RET_NAK);
  924:                 return USB_RET_NAK;
  925:             case EPIPE:
  926:             default:
  927:                 trace_usb_host_req_complete(s->bus_num, s->addr, USB_RET_STALL);
  928:                 return USB_RET_STALL;
  929:             }
  930:         }
  931:     }
  932: 
  933:     return USB_RET_ASYNC;
  934: }
  935: 
  936: static int ctrl_error(void)
  937: {
  938:     if (errno == ETIMEDOUT) {
  939:         return USB_RET_NAK;
  940:     } else {
  941:         return USB_RET_STALL;
  942:     }
  943: }
  944: 
  945: static int usb_host_set_address(USBHostDevice *s, int addr)
  946: {
  947:     trace_usb_host_set_address(s->bus_num, s->addr, addr);
  948:     s->dev.addr = addr;
  949:     return 0;
  950: }
  951: 
  952: static int usb_host_set_config(USBHostDevice *s, int config)
  953: {
  954:     int ret, first = 1;
  955: 
  956:     trace_usb_host_set_config(s->bus_num, s->addr, config);
  957: 
  958:     usb_host_release_interfaces(s);
  959: 
  960: again:
  961:     ret = ioctl(s->fd, USBDEVFS_SETCONFIGURATION, &config);
  962: 
  963:     DPRINTF("husb: ctrl set config %d ret %d errno %d\n", config, ret, errno);
  964: 
  965:     if (ret < 0 && errno == EBUSY && first) {
  966:         /* happens if usb device is in use by host drivers */
  967:         int count = usb_linux_get_num_interfaces(s);
  968:         if (count > 0) {
  969:             DPRINTF("husb: busy -> disconnecting %d interfaces\n", count);
  970:             usb_host_disconnect_ifaces(s, count);
  971:             first = 0;
  972:             goto again;
  973:         }
  974:     }
  975: 
  976:     if (ret < 0) {
  977:         return ctrl_error();
  978:     }
  979:     usb_host_claim_interfaces(s, config);
  980:     usb_linux_update_endp_table(s);
  981:     return 0;
  982: }
  983: 
  984: static int usb_host_set_interface(USBHostDevice *s, int iface, int alt)
  985: {
  986:     struct usbdevfs_setinterface si;
  987:     int i, ret;
  988: 
  989:     trace_usb_host_set_interface(s->bus_num, s->addr, iface, alt);
  990: 
  991:     for (i = 1; i <= MAX_ENDPOINTS; i++) {
  992:         if (is_isoc(s, USB_TOKEN_IN, i)) {
  993:             usb_host_stop_n_free_iso(s, USB_TOKEN_IN, i);
  994:         }
  995:         if (is_isoc(s, USB_TOKEN_OUT, i)) {
  996:             usb_host_stop_n_free_iso(s, USB_TOKEN_OUT, i);
  997:         }
  998:     }
  999: 
 1000:     si.interface  = iface;
 1001:     si.altsetting = alt;
 1002:     ret = ioctl(s->fd, USBDEVFS_SETINTERFACE, &si);
 1003: 
 1004:     DPRINTF("husb: ctrl set iface %d altset %d ret %d errno %d\n",
 1005:             iface, alt, ret, errno);
 1006: 
 1007:     if (ret < 0) {
 1008:         return ctrl_error();
 1009:     }
 1010:     usb_linux_update_endp_table(s);
 1011:     return 0;
 1012: }
 1013: 
 1014: static int usb_host_handle_control(USBDevice *dev, USBPacket *p,
 1015:                int request, int value, int index, int length, uint8_t *data)
 1016: {
 1017:     USBHostDevice *s = DO_UPCAST(USBHostDevice, dev, dev);
 1018:     struct usbdevfs_urb *urb;
 1019:     AsyncURB *aurb;
 1020:     int ret;
 1021: 
 1022:     /*
 1023:      * Process certain standard device requests.
 1024:      * These are infrequent and are processed synchronously.
 1025:      */
 1026: 
 1027:     /* Note request is (bRequestType << 8) | bRequest */
 1028:     trace_usb_host_req_control(s->bus_num, s->addr, request, value, index);
 1029: 
 1030:     switch (request) {
 1031:     case DeviceOutRequest | USB_REQ_SET_ADDRESS:
 1032:         return usb_host_set_address(s, value);
 1033: 
 1034:     case DeviceOutRequest | USB_REQ_SET_CONFIGURATION:
 1035:         return usb_host_set_config(s, value & 0xff);
 1036: 
 1037:     case InterfaceOutRequest | USB_REQ_SET_INTERFACE:
 1038:         return usb_host_set_interface(s, index, value);
 1039:     }
 1040: 
 1041:     /* The rest are asynchronous */
 1042: 
 1043:     if (length > sizeof(dev->data_buf)) {
 1044:         fprintf(stderr, "husb: ctrl buffer too small (%d > %zu)\n",
 1045:                 length, sizeof(dev->data_buf));
 1046:         return USB_RET_STALL;
 1047:     }
 1048: 
 1049:     aurb = async_alloc(s);
 1050:     aurb->packet = p;
 1051: 
 1052:     /*
 1053:      * Setup ctrl transfer.
 1054:      *
 1055:      * s->ctrl is laid out such that data buffer immediately follows
 1056:      * 'req' struct which is exactly what usbdevfs expects.
 1057:      */
 1058:     urb = &aurb->urb;
 1059: 
 1060:     urb->type     = USBDEVFS_URB_TYPE_CONTROL;
 1061:     urb->endpoint = p->devep;
 1062: 
 1063:     urb->buffer        = &dev->setup_buf;
 1064:     urb->buffer_length = length + 8;
 1065: 
 1066:     urb->usercontext = s;
 1067: 
 1068:     trace_usb_host_urb_submit(s->bus_num, s->addr, aurb,
 1069:                               urb->buffer_length, aurb->more);
 1070:     ret = ioctl(s->fd, USBDEVFS_SUBMITURB, urb);
 1071: 
 1072:     DPRINTF("husb: submit ctrl. len %u aurb %p\n", urb->buffer_length, aurb);
 1073: 
 1074:     if (ret < 0) {
 1075:         DPRINTF("husb: submit failed. errno %d\n", errno);
 1076:         async_free(aurb);
 1077: 
 1078:         switch(errno) {
 1079:         case ETIMEDOUT:
 1080:             return USB_RET_NAK;
 1081:         case EPIPE:
 1082:         default:
 1083:             return USB_RET_STALL;
 1084:         }
 1085:     }
 1086: 
 1087:     return USB_RET_ASYNC;
 1088: }
 1089: 
 1090: static uint8_t usb_linux_get_alt_setting(USBHostDevice *s,
 1091:     uint8_t configuration, uint8_t interface)
 1092: {
 1093:     uint8_t alt_setting;
 1094:     struct usb_ctrltransfer ct;
 1095:     int ret;
 1096: 
 1097:     if (usb_fs_type == USB_FS_SYS) {
 1098:         char device_name[64], line[1024];
 1099:         int alt_setting;
 1100: 
 1101:         sprintf(device_name, "%d-%s:%d.%d", s->bus_num, s->port,
 1102:                 (int)configuration, (int)interface);
 1103: 
 1104:         if (!usb_host_read_file(line, sizeof(line), "bAlternateSetting",
 1105:                                 device_name)) {
 1106:             goto usbdevfs;
 1107:         }
 1108:         if (sscanf(line, "%d", &alt_setting) != 1) {
 1109:             goto usbdevfs;
 1110:         }
 1111:         return alt_setting;
 1112:     }
 1113: 
 1114: usbdevfs:
 1115:     ct.bRequestType = USB_DIR_IN | USB_RECIP_INTERFACE;
 1116:     ct.bRequest = USB_REQ_GET_INTERFACE;
 1117:     ct.wValue = 0;
 1118:     ct.wIndex = interface;
 1119:     ct.wLength = 1;
 1120:     ct.data = &alt_setting;
 1121:     ct.timeout = 50;
 1122:     ret = ioctl(s->fd, USBDEVFS_CONTROL, &ct);
 1123:     if (ret < 0) {
 1124:         /* Assume alt 0 on error */
 1125:         return 0;
 1126:     }
 1127: 
 1128:     return alt_setting;
 1129: }
 1130: 
 1131: /* returns 1 on problem encountered or 0 for success */
 1132: static int usb_linux_update_endp_table(USBHostDevice *s)
 1133: {
 1134:     uint8_t *descriptors;
 1135:     uint8_t devep, type, alt_interface;
 1136:     int interface, length, i, ep, pid;
 1137:     struct endp_data *epd;
 1138: 
 1139:     for (i = 0; i < MAX_ENDPOINTS; i++) {
 1140:         s->ep_in[i].type = INVALID_EP_TYPE;
 1141:         s->ep_out[i].type = INVALID_EP_TYPE;
 1142:     }
 1143: 
 1144:     if (s->configuration == 0) {
 1145:         /* not configured yet -- leave all endpoints disabled */
 1146:         return 0;
 1147:     }
 1148: 
 1149:     /* get the desired configuration, interface, and endpoint descriptors
 1150:      * from device description */
 1151:     descriptors = &s->descr[18];
 1152:     length = s->descr_len - 18;
 1153:     i = 0;
 1154: 
 1155:     while (i < length) {
 1156:         if (descriptors[i + 1] != USB_DT_CONFIG) {
 1157:             fprintf(stderr, "invalid descriptor data\n");
 1158:             return 1;
 1159:         } else if (descriptors[i + 5] != s->configuration) {
 1160:             DPRINTF("not requested configuration %d\n", s->configuration);
 1161:             i += (descriptors[i + 3] << 8) + descriptors[i + 2];
 1162:             continue;
 1163:         }
 1164: 
 1165:         i += descriptors[i];
 1166: 
 1167:         if (descriptors[i + 1] != USB_DT_INTERFACE ||
 1168:             (descriptors[i + 1] == USB_DT_INTERFACE &&
 1169:              descriptors[i + 4] == 0)) {
 1170:             i += descriptors[i];
 1171:             continue;
 1172:         }
 1173: 
 1174:         interface = descriptors[i + 2];
 1175:         alt_interface = usb_linux_get_alt_setting(s, s->configuration,
 1176:                                                   interface);
 1177: 
 1178:         /* the current interface descriptor is the active interface
 1179:          * and has endpoints */
 1180:         if (descriptors[i + 3] != alt_interface) {
 1181:             i += descriptors[i];
 1182:             continue;
 1183:         }
 1184: 
 1185:         /* advance to the endpoints */
 1186:         while (i < length && descriptors[i +1] != USB_DT_ENDPOINT) {
 1187:             i += descriptors[i];
 1188:         }
 1189: 
 1190:         if (i >= length)
 1191:             break;
 1192: 
 1193:         while (i < length) {
 1194:             if (descriptors[i + 1] != USB_DT_ENDPOINT) {
 1195:                 break;
 1196:             }
 1197: 
 1198:             devep = descriptors[i + 2];
 1199:             pid = (devep & USB_DIR_IN) ? USB_TOKEN_IN : USB_TOKEN_OUT;
 1200:             ep = devep & 0xf;
 1201:             if (ep == 0) {
 1202:                 fprintf(stderr, "usb-linux: invalid ep descriptor, ep == 0\n");
 1203:                 return 1;
 1204:             }
 1205: 
 1206:             switch (descriptors[i + 3] & 0x3) {
 1207:             case 0x00:
 1208:                 type = USBDEVFS_URB_TYPE_CONTROL;
 1209:                 break;
 1210:             case 0x01:
 1211:                 type = USBDEVFS_URB_TYPE_ISO;
 1212:                 set_max_packet_size(s, pid, ep, descriptors + i);
 1213:                 break;
 1214:             case 0x02:
 1215:                 type = USBDEVFS_URB_TYPE_BULK;
 1216:                 break;
 1217:             case 0x03:
 1218:                 type = USBDEVFS_URB_TYPE_INTERRUPT;
 1219:                 break;
 1220:             default:
 1221:                 DPRINTF("usb_host: malformed endpoint type\n");
 1222:                 type = USBDEVFS_URB_TYPE_BULK;
 1223:             }
 1224:             epd = get_endp(s, pid, ep);
 1225:             assert(epd->type == INVALID_EP_TYPE);
 1226:             epd->type = type;
 1227:             epd->halted = 0;
 1228: 
 1229:             i += descriptors[i];
 1230:         }
 1231:     }
 1232:     return 0;
 1233: }
 1234: 
 1235: /*
 1236:  * Check if we can safely redirect a usb2 device to a usb1 virtual controller,
 1237:  * this function assumes this is safe, if:
 1238:  * 1) There are no isoc endpoints
 1239:  * 2) There are no interrupt endpoints with a max_packet_size > 64
 1240:  * Note bulk endpoints with a max_packet_size > 64 in theory also are not
 1241:  * usb1 compatible, but in practice this seems to work fine.
 1242:  */
 1243: static int usb_linux_full_speed_compat(USBHostDevice *dev)
 1244: {
 1245:     int i, packet_size;
 1246: 
 1247:     /*
 1248:      * usb_linux_update_endp_table only registers info about ep in the current
 1249:      * interface altsettings, so we need to parse the descriptors again.
 1250:      */
 1251:     for (i = 0; (i + 5) < dev->descr_len; i += dev->descr[i]) {
 1252:         if (dev->descr[i + 1] == USB_DT_ENDPOINT) {
 1253:             switch (dev->descr[i + 3] & 0x3) {
 1254:             case 0x00: /* CONTROL */
 1255:                 break;
 1256:             case 0x01: /* ISO */
 1257:                 return 0;
 1258:             case 0x02: /* BULK */
 1259:                 break;
 1260:             case 0x03: /* INTERRUPT */
 1261:                 packet_size = dev->descr[i + 4] + (dev->descr[i + 5] << 8);
 1262:                 if (packet_size > 64)
 1263:                     return 0;
 1264:                 break;
 1265:             }
 1266:         }
 1267:     }
 1268:     return 1;
 1269: }
 1270: 
 1271: static int usb_host_open(USBHostDevice *dev, int bus_num,
 1272:                          int addr, const char *port,
 1273:                          const char *prod_name, int speed)
 1274: {
 1275:     int fd = -1, ret;
 1276:     char buf[1024];
 1277: 
 1278:     trace_usb_host_open_started(bus_num, addr);
 1279: 
 1280:     if (dev->fd != -1) {
 1281:         goto fail;
 1282:     }
 1283: 
 1284:     if (!usb_host_device_path) {
 1285:         perror("husb: USB Host Device Path not set");
 1286:         goto fail;
 1287:     }
 1288:     snprintf(buf, sizeof(buf), "%s/%03d/%03d", usb_host_device_path,
 1289:              bus_num, addr);
 1290:     fd = open(buf, O_RDWR | O_NONBLOCK);
 1291:     if (fd < 0) {
 1292:         perror(buf);
 1293:         goto fail;
 1294:     }
 1295:     DPRINTF("husb: opened %s\n", buf);
 1296: 
 1297:     dev->bus_num = bus_num;
 1298:     dev->addr = addr;
 1299:     strcpy(dev->port, port);
 1300:     dev->fd = fd;
 1301: 
 1302:     /* read the device description */
 1303:     dev->descr_len = read(fd, dev->descr, sizeof(dev->descr));
 1304:     if (dev->descr_len <= 0) {
 1305:         perror("husb: reading device data failed");
 1306:         goto fail;
 1307:     }
 1308: 
 1309: #ifdef DEBUG
 1310:     {
 1311:         int x;
 1312:         printf("=== begin dumping device descriptor data ===\n");
 1313:         for (x = 0; x < dev->descr_len; x++) {
 1314:             printf("%02x ", dev->descr[x]);
 1315:         }
 1316:         printf("\n=== end dumping device descriptor data ===\n");
 1317:     }
 1318: #endif
 1319: 
 1320: 
 1321:     /* start unconfigured -- we'll wait for the guest to set a configuration */
 1322:     if (!usb_host_claim_interfaces(dev, 0)) {
 1323:         goto fail;
 1324:     }
 1325: 
 1326:     ret = usb_linux_update_endp_table(dev);
 1327:     if (ret) {
 1328:         goto fail;
 1329:     }
 1330: 
 1331:     if (speed == -1) {
 1332:         struct usbdevfs_connectinfo ci;
 1333: 
 1334:         ret = ioctl(fd, USBDEVFS_CONNECTINFO, &ci);
 1335:         if (ret < 0) {
 1336:             perror("usb_host_device_open: USBDEVFS_CONNECTINFO");
 1337:             goto fail;
 1338:         }
 1339: 
 1340:         if (ci.slow) {
 1341:             speed = USB_SPEED_LOW;
 1342:         } else {
 1343:             speed = USB_SPEED_HIGH;
 1344:         }
 1345:     }
 1346:     dev->dev.speed = speed;
 1347:     dev->dev.speedmask = (1 << speed);
 1348:     if (dev->dev.speed == USB_SPEED_HIGH && usb_linux_full_speed_compat(dev)) {
 1349:         dev->dev.speedmask |= USB_SPEED_MASK_FULL;
 1350:     }
 1351: 
 1352:     trace_usb_host_open_success(bus_num, addr);
 1353: 
 1354:     if (!prod_name || prod_name[0] == '\0') {
 1355:         snprintf(dev->dev.product_desc, sizeof(dev->dev.product_desc),
 1356:                  "host:%d.%d", bus_num, addr);
 1357:     } else {
 1358:         pstrcpy(dev->dev.product_desc, sizeof(dev->dev.product_desc),
 1359:                 prod_name);
 1360:     }
 1361: 
 1362:     ret = usb_device_attach(&dev->dev);
 1363:     if (ret) {
 1364:         goto fail;
 1365:     }
 1366: 
 1367:     /* USB devio uses 'write' flag to check for async completions */
 1368:     qemu_set_fd_handler(dev->fd, NULL, async_complete, dev);
 1369: 
 1370:     return 0;
 1371: 
 1372: fail:
 1373:     trace_usb_host_open_failure(bus_num, addr);
 1374:     if (dev->fd != -1) {
 1375:         close(dev->fd);
 1376:         dev->fd = -1;
 1377:     }
 1378:     return -1;
 1379: }
 1380: 
 1381: static int usb_host_close(USBHostDevice *dev)
 1382: {
 1383:     int i;
 1384: 
 1385:     if (dev->fd == -1) {
 1386:         return -1;
 1387:     }
 1388: 
 1389:     trace_usb_host_close(dev->bus_num, dev->addr);
 1390: 
 1391:     qemu_set_fd_handler(dev->fd, NULL, NULL, NULL);
 1392:     dev->closing = 1;
 1393:     for (i = 1; i <= MAX_ENDPOINTS; i++) {
 1394:         if (is_isoc(dev, USB_TOKEN_IN, i)) {
 1395:             usb_host_stop_n_free_iso(dev, USB_TOKEN_IN, i);
 1396:         }
 1397:         if (is_isoc(dev, USB_TOKEN_OUT, i)) {
 1398:             usb_host_stop_n_free_iso(dev, USB_TOKEN_OUT, i);
 1399:         }
 1400:     }
 1401:     async_complete(dev);
 1402:     dev->closing = 0;
 1403:     if (dev->dev.attached) {
 1404:         usb_device_detach(&dev->dev);
 1405:     }
 1406:     usb_host_do_reset(dev);
 1407:     close(dev->fd);
 1408:     dev->fd = -1;
 1409:     return 0;
 1410: }
 1411: 
 1412: static void usb_host_exit_notifier(struct Notifier *n, void *data)
 1413: {
 1414:     USBHostDevice *s = container_of(n, USBHostDevice, exit);
 1415: 
 1416:     usb_host_release_port(s);
 1417:     if (s->fd != -1) {
 1418:         usb_host_do_reset(s);;
 1419:     }
 1420: }
 1421: 
 1422: static int usb_host_initfn(USBDevice *dev)
 1423: {
 1424:     USBHostDevice *s = DO_UPCAST(USBHostDevice, dev, dev);
 1425: 
 1426:     dev->auto_attach = 0;
 1427:     s->fd = -1;
 1428:     s->hub_fd = -1;
 1429: 
 1430:     QTAILQ_INSERT_TAIL(&hostdevs, s, next);
 1431:     s->exit.notify = usb_host_exit_notifier;
 1432:     qemu_add_exit_notifier(&s->exit);
 1433:     usb_host_auto_check(NULL);
 1434: 
 1435:     if (s->match.bus_num != 0 && s->match.port != NULL) {
 1436:         usb_host_claim_port(s);
 1437:     }
 1438:     return 0;
 1439: }
 1440: 
 1441: static const VMStateDescription vmstate_usb_host = {
 1442:     .name = "usb-host",
 1443:     .unmigratable = 1,
 1444: };
 1445: 
 1446: static struct USBDeviceInfo usb_host_dev_info = {
 1447:     .product_desc   = "USB Host Device",
 1448:     .qdev.name      = "usb-host",
 1449:     .qdev.size      = sizeof(USBHostDevice),
 1450:     .qdev.vmsd      = &vmstate_usb_host,
 1451:     .init           = usb_host_initfn,
 1452:     .handle_packet  = usb_generic_handle_packet,
 1453:     .cancel_packet  = usb_host_async_cancel,
 1454:     .handle_data    = usb_host_handle_data,
 1455:     .handle_control = usb_host_handle_control,
 1456:     .handle_reset   = usb_host_handle_reset,
 1457:     .handle_destroy = usb_host_handle_destroy,
 1458:     .usbdevice_name = "host",
 1459:     .usbdevice_init = usb_host_device_open,
 1460:     .qdev.props     = (Property[]) {
 1461:         DEFINE_PROP_UINT32("hostbus",  USBHostDevice, match.bus_num,    0),
 1462:         DEFINE_PROP_UINT32("hostaddr", USBHostDevice, match.addr,       0),
 1463:         DEFINE_PROP_STRING("hostport", USBHostDevice, match.port),
 1464:         DEFINE_PROP_HEX32("vendorid",  USBHostDevice, match.vendor_id,  0),
 1465:         DEFINE_PROP_HEX32("productid", USBHostDevice, match.product_id, 0),
 1466:         DEFINE_PROP_UINT32("isobufs",  USBHostDevice, iso_urb_count,    4),
 1467:         DEFINE_PROP_END_OF_LIST(),
 1468:     },
 1469: };
 1470: 
 1471: static void usb_host_register_devices(void)
 1472: {
 1473:     usb_qdev_register(&usb_host_dev_info);
 1474: }
 1475: device_init(usb_host_register_devices)
 1476: 
 1477: USBDevice *usb_host_device_open(const char *devname)
 1478: {
 1479:     struct USBAutoFilter filter;
 1480:     USBDevice *dev;
 1481:     char *p;
 1482: 
 1483:     dev = usb_create(NULL /* FIXME */, "usb-host");
 1484: 
 1485:     if (strstr(devname, "auto:")) {
 1486:         if (parse_filter(devname, &filter) < 0) {
 1487:             goto fail;
 1488:         }
 1489:     } else {
 1490:         if ((p = strchr(devname, '.'))) {
 1491:             filter.bus_num    = strtoul(devname, NULL, 0);
 1492:             filter.addr       = strtoul(p + 1, NULL, 0);
 1493:             filter.vendor_id  = 0;
 1494:             filter.product_id = 0;
 1495:         } else if ((p = strchr(devname, ':'))) {
 1496:             filter.bus_num    = 0;
 1497:             filter.addr       = 0;
 1498:             filter.vendor_id  = strtoul(devname, NULL, 16);
 1499:             filter.product_id = strtoul(p + 1, NULL, 16);
 1500:         } else {
 1501:             goto fail;
 1502:         }
 1503:     }
 1504: 
 1505:     qdev_prop_set_uint32(&dev->qdev, "hostbus",   filter.bus_num);
 1506:     qdev_prop_set_uint32(&dev->qdev, "hostaddr",  filter.addr);
 1507:     qdev_prop_set_uint32(&dev->qdev, "vendorid",  filter.vendor_id);
 1508:     qdev_prop_set_uint32(&dev->qdev, "productid", filter.product_id);
 1509:     qdev_init_nofail(&dev->qdev);
 1510:     return dev;
 1511: 
 1512: fail:
 1513:     qdev_free(&dev->qdev);
 1514:     return NULL;
 1515: }
 1516: 
 1517: int usb_host_device_close(const char *devname)
 1518: {
 1519: #if 0
 1520:     char product_name[PRODUCT_NAME_SZ];
 1521:     int bus_num, addr;
 1522:     USBHostDevice *s;
 1523: 
 1524:     if (strstr(devname, "auto:")) {
 1525:         return usb_host_auto_del(devname);
 1526:     }
 1527:     if (usb_host_find_device(&bus_num, &addr, product_name,
 1528:                                     sizeof(product_name), devname) < 0) {
 1529:         return -1;
 1530:     }
 1531:     s = hostdev_find(bus_num, addr);
 1532:     if (s) {
 1533:         usb_device_delete_addr(s->bus_num, s->dev.addr);
 1534:         return 0;
 1535:     }
 1536: #endif
 1537: 
 1538:     return -1;
 1539: }
 1540: 
 1541: static int get_tag_value(char *buf, int buf_size,
 1542:                          const char *str, const char *tag,
 1543:                          const char *stopchars)
 1544: {
 1545:     const char *p;
 1546:     char *q;
 1547:     p = strstr(str, tag);
 1548:     if (!p) {
 1549:         return -1;
 1550:     }
 1551:     p += strlen(tag);
 1552:     while (qemu_isspace(*p)) {
 1553:         p++;
 1554:     }
 1555:     q = buf;
 1556:     while (*p != '\0' && !strchr(stopchars, *p)) {
 1557:         if ((q - buf) < (buf_size - 1)) {
 1558:             *q++ = *p;
 1559:         }
 1560:         p++;
 1561:     }
 1562:     *q = '\0';
 1563:     return q - buf;
 1564: }
 1565: 
 1566: /*
 1567:  * Use /proc/bus/usb/devices or /dev/bus/usb/devices file to determine
 1568:  * host's USB devices. This is legacy support since many distributions
 1569:  * are moving to /sys/bus/usb
 1570:  */
 1571: static int usb_host_scan_dev(void *opaque, USBScanFunc *func)
 1572: {
 1573:     FILE *f = NULL;
 1574:     char line[1024];
 1575:     char buf[1024];
 1576:     int bus_num, addr, speed, device_count;
 1577:     int class_id, product_id, vendor_id, port;
 1578:     char product_name[512];
 1579:     int ret = 0;
 1580: 
 1581:     if (!usb_host_device_path) {
 1582:         perror("husb: USB Host Device Path not set");
 1583:         goto the_end;
 1584:     }
 1585:     snprintf(line, sizeof(line), "%s/devices", usb_host_device_path);
 1586:     f = fopen(line, "r");
 1587:     if (!f) {
 1588:         perror("husb: cannot open devices file");
 1589:         goto the_end;
 1590:     }
 1591: 
 1592:     device_count = 0;
 1593:     bus_num = addr = class_id = product_id = vendor_id = port = 0;
 1594:     speed = -1; /* Can't get the speed from /[proc|dev]/bus/usb/devices */
 1595:     for(;;) {
 1596:         if (fgets(line, sizeof(line), f) == NULL) {
 1597:             break;
 1598:         }
 1599:         if (strlen(line) > 0) {
 1600:             line[strlen(line) - 1] = '\0';
 1601:         }
 1602:         if (line[0] == 'T' && line[1] == ':') {
 1603:             if (device_count && (vendor_id || product_id)) {
 1604:                 /* New device.  Add the previously discovered device.  */
 1605:                 if (port > 0) {
 1606:                     snprintf(buf, sizeof(buf), "%d", port);
 1607:                 } else {
 1608:                     snprintf(buf, sizeof(buf), "?");
 1609:                 }
 1610:                 ret = func(opaque, bus_num, addr, buf, class_id, vendor_id,
 1611:                            product_id, product_name, speed);
 1612:                 if (ret) {
 1613:                     goto the_end;
 1614:                 }
 1615:             }
 1616:             if (get_tag_value(buf, sizeof(buf), line, "Bus=", " ") < 0) {
 1617:                 goto fail;
 1618:             }
 1619:             bus_num = atoi(buf);
 1620:             if (get_tag_value(buf, sizeof(buf), line, "Port=", " ") < 0) {
 1621:                 goto fail;
 1622:             }
 1623:             port = atoi(buf);
 1624:             if (get_tag_value(buf, sizeof(buf), line, "Dev#=", " ") < 0) {
 1625:                 goto fail;
 1626:             }
 1627:             addr = atoi(buf);
 1628:             if (get_tag_value(buf, sizeof(buf), line, "Spd=", " ") < 0) {
 1629:                 goto fail;
 1630:             }
 1631:             if (!strcmp(buf, "5000")) {
 1632:                 speed = USB_SPEED_SUPER;
 1633:             } else if (!strcmp(buf, "480")) {
 1634:                 speed = USB_SPEED_HIGH;
 1635:             } else if (!strcmp(buf, "1.5")) {
 1636:                 speed = USB_SPEED_LOW;
 1637:             } else {
 1638:                 speed = USB_SPEED_FULL;
 1639:             }
 1640:             product_name[0] = '\0';
 1641:             class_id = 0xff;
 1642:             device_count++;
 1643:             product_id = 0;
 1644:             vendor_id = 0;
 1645:         } else if (line[0] == 'P' && line[1] == ':') {
 1646:             if (get_tag_value(buf, sizeof(buf), line, "Vendor=", " ") < 0) {
 1647:                 goto fail;
 1648:             }
 1649:             vendor_id = strtoul(buf, NULL, 16);
 1650:             if (get_tag_value(buf, sizeof(buf), line, "ProdID=", " ") < 0) {
 1651:                 goto fail;
 1652:             }
 1653:             product_id = strtoul(buf, NULL, 16);
 1654:         } else if (line[0] == 'S' && line[1] == ':') {
 1655:             if (get_tag_value(buf, sizeof(buf), line, "Product=", "") < 0) {
 1656:                 goto fail;
 1657:             }
 1658:             pstrcpy(product_name, sizeof(product_name), buf);
 1659:         } else if (line[0] == 'D' && line[1] == ':') {
 1660:             if (get_tag_value(buf, sizeof(buf), line, "Cls=", " (") < 0) {
 1661:                 goto fail;
 1662:             }
 1663:             class_id = strtoul(buf, NULL, 16);
 1664:         }
 1665:     fail: ;
 1666:     }
 1667:     if (device_count && (vendor_id || product_id)) {
 1668:         /* Add the last device.  */
 1669:         if (port > 0) {
 1670:             snprintf(buf, sizeof(buf), "%d", port);
 1671:         } else {
 1672:             snprintf(buf, sizeof(buf), "?");
 1673:         }
 1674:         ret = func(opaque, bus_num, addr, buf, class_id, vendor_id,
 1675:                    product_id, product_name, speed);
 1676:     }
 1677:  the_end:
 1678:     if (f) {
 1679:         fclose(f);
 1680:     }
 1681:     return ret;
 1682: }
 1683: 
 1684: /*
 1685:  * Read sys file-system device file
 1686:  *
 1687:  * @line address of buffer to put file contents in
 1688:  * @line_size size of line
 1689:  * @device_file path to device file (printf format string)
 1690:  * @device_name device being opened (inserted into device_file)
 1691:  *
 1692:  * @return 0 failed, 1 succeeded ('line' contains data)
 1693:  */
 1694: static int usb_host_read_file(char *line, size_t line_size,
 1695:                               const char *device_file, const char *device_name)
 1696: {
 1697:     FILE *f;
 1698:     int ret = 0;
 1699:     char filename[PATH_MAX];
 1700: 
 1701:     snprintf(filename, PATH_MAX, USBSYSBUS_PATH "/devices/%s/%s", device_name,
 1702:              device_file);
 1703:     f = fopen(filename, "r");
 1704:     if (f) {
 1705:         ret = fgets(line, line_size, f) != NULL;
 1706:         fclose(f);
 1707:     }
 1708: 
 1709:     return ret;
 1710: }
 1711: 
 1712: /*
 1713:  * Use /sys/bus/usb/devices/ directory to determine host's USB
 1714:  * devices.
 1715:  *
 1716:  * This code is based on Robert Schiele's original patches posted to
 1717:  * the Novell bug-tracker https://bugzilla.novell.com/show_bug.cgi?id=241950
 1718:  */
 1719: static int usb_host_scan_sys(void *opaque, USBScanFunc *func)
 1720: {
 1721:     DIR *dir = NULL;
 1722:     char line[1024];
 1723:     int bus_num, addr, speed, class_id, product_id, vendor_id;
 1724:     int ret = 0;
 1725:     char port[MAX_PORTLEN];
 1726:     char product_name[512];
 1727:     struct dirent *de;
 1728: 
 1729:     dir = opendir(USBSYSBUS_PATH "/devices");
 1730:     if (!dir) {
 1731:         perror("husb: cannot open devices directory");
 1732:         goto the_end;
 1733:     }
 1734: 
 1735:     while ((de = readdir(dir))) {
 1736:         if (de->d_name[0] != '.' && !strchr(de->d_name, ':')) {
 1737:             if (sscanf(de->d_name, "%d-%7[0-9.]", &bus_num, port) < 2) {
 1738:                 continue;
 1739:             }
 1740: 
 1741:             if (!usb_host_read_file(line, sizeof(line), "devnum", de->d_name)) {
 1742:                 goto the_end;
 1743:             }
 1744:             if (sscanf(line, "%d", &addr) != 1) {
 1745:                 goto the_end;
 1746:             }
 1747:             if (!usb_host_read_file(line, sizeof(line), "bDeviceClass",
 1748:                                     de->d_name)) {
 1749:                 goto the_end;
 1750:             }
 1751:             if (sscanf(line, "%x", &class_id) != 1) {
 1752:                 goto the_end;
 1753:             }
 1754: 
 1755:             if (!usb_host_read_file(line, sizeof(line), "idVendor",
 1756:                                     de->d_name)) {
 1757:                 goto the_end;
 1758:             }
 1759:             if (sscanf(line, "%x", &vendor_id) != 1) {
 1760:                 goto the_end;
 1761:             }
 1762:             if (!usb_host_read_file(line, sizeof(line), "idProduct",
 1763:                                     de->d_name)) {
 1764:                 goto the_end;
 1765:             }
 1766:             if (sscanf(line, "%x", &product_id) != 1) {
 1767:                 goto the_end;
 1768:             }
 1769:             if (!usb_host_read_file(line, sizeof(line), "product",
 1770:                                     de->d_name)) {
 1771:                 *product_name = 0;
 1772:             } else {
 1773:                 if (strlen(line) > 0) {
 1774:                     line[strlen(line) - 1] = '\0';
 1775:                 }
 1776:                 pstrcpy(product_name, sizeof(product_name), line);
 1777:             }
 1778: 
 1779:             if (!usb_host_read_file(line, sizeof(line), "speed", de->d_name)) {
 1780:                 goto the_end;
 1781:             }
 1782:             if (!strcmp(line, "5000\n")) {
 1783:                 speed = USB_SPEED_SUPER;
 1784:             } else if (!strcmp(line, "480\n")) {
 1785:                 speed = USB_SPEED_HIGH;
 1786:             } else if (!strcmp(line, "1.5\n")) {
 1787:                 speed = USB_SPEED_LOW;
 1788:             } else {
 1789:                 speed = USB_SPEED_FULL;
 1790:             }
 1791: 
 1792:             ret = func(opaque, bus_num, addr, port, class_id, vendor_id,
 1793:                        product_id, product_name, speed);
 1794:             if (ret) {
 1795:                 goto the_end;
 1796:             }
 1797:         }
 1798:     }
 1799:  the_end:
 1800:     if (dir) {
 1801:         closedir(dir);
 1802:     }
 1803:     return ret;
 1804: }
 1805: 
 1806: /*
 1807:  * Determine how to access the host's USB devices and call the
 1808:  * specific support function.
 1809:  */
 1810: static int usb_host_scan(void *opaque, USBScanFunc *func)
 1811: {
 1812:     Monitor *mon = cur_mon;
 1813:     FILE *f = NULL;
 1814:     DIR *dir = NULL;
 1815:     int ret = 0;
 1816:     const char *fs_type[] = {"unknown", "proc", "dev", "sys"};
 1817:     char devpath[PATH_MAX];
 1818: 
 1819:     /* only check the host once */
 1820:     if (!usb_fs_type) {
 1821:         dir = opendir(USBSYSBUS_PATH "/devices");
 1822:         if (dir) {
 1823:             /* devices found in /dev/bus/usb/ (yes - not a mistake!) */
 1824:             strcpy(devpath, USBDEVBUS_PATH);
 1825:             usb_fs_type = USB_FS_SYS;
 1826:             closedir(dir);
 1827:             DPRINTF(USBDBG_DEVOPENED, USBSYSBUS_PATH);
 1828:             goto found_devices;
 1829:         }
 1830:         f = fopen(USBPROCBUS_PATH "/devices", "r");
 1831:         if (f) {
 1832:             /* devices found in /proc/bus/usb/ */
 1833:             strcpy(devpath, USBPROCBUS_PATH);
 1834:             usb_fs_type = USB_FS_PROC;
 1835:             fclose(f);
 1836:             DPRINTF(USBDBG_DEVOPENED, USBPROCBUS_PATH);
 1837:             goto found_devices;
 1838:         }
 1839:         /* try additional methods if an access method hasn't been found yet */
 1840:         f = fopen(USBDEVBUS_PATH "/devices", "r");
 1841:         if (f) {
 1842:             /* devices found in /dev/bus/usb/ */
 1843:             strcpy(devpath, USBDEVBUS_PATH);
 1844:             usb_fs_type = USB_FS_DEV;
 1845:             fclose(f);
 1846:             DPRINTF(USBDBG_DEVOPENED, USBDEVBUS_PATH);
 1847:             goto found_devices;
 1848:         }
 1849:     found_devices:
 1850:         if (!usb_fs_type) {
 1851:             if (mon) {
 1852:                 monitor_printf(mon, "husb: unable to access USB devices\n");
 1853:             }
 1854:             return -ENOENT;
 1855:         }
 1856: 
 1857:         /* the module setting (used later for opening devices) */
 1858:         usb_host_device_path = g_malloc0(strlen(devpath)+1);
 1859:         strcpy(usb_host_device_path, devpath);
 1860:         if (mon) {
 1861:             monitor_printf(mon, "husb: using %s file-system with %s\n",
 1862:                            fs_type[usb_fs_type], usb_host_device_path);
 1863:         }
 1864:     }
 1865: 
 1866:     switch (usb_fs_type) {
 1867:     case USB_FS_PROC:
 1868:     case USB_FS_DEV:
 1869:         ret = usb_host_scan_dev(opaque, func);
 1870:         break;
 1871:     case USB_FS_SYS:
 1872:         ret = usb_host_scan_sys(opaque, func);
 1873:         break;
 1874:     default:
 1875:         ret = -EINVAL;
 1876:         break;
 1877:     }
 1878:     return ret;
 1879: }
 1880: 
 1881: static QEMUTimer *usb_auto_timer;
 1882: 
 1883: static int usb_host_auto_scan(void *opaque, int bus_num,
 1884:                               int addr, const char *port,
 1885:                               int class_id, int vendor_id, int product_id,
 1886:                               const char *product_name, int speed)
 1887: {
 1888:     struct USBAutoFilter *f;
 1889:     struct USBHostDevice *s;
 1890: 
 1891:     /* Ignore hubs */
 1892:     if (class_id == 9)
 1893:         return 0;
 1894: 
 1895:     QTAILQ_FOREACH(s, &hostdevs, next) {
 1896:         f = &s->match;
 1897: 
 1898:         if (f->bus_num > 0 && f->bus_num != bus_num) {
 1899:             continue;
 1900:         }
 1901:         if (f->addr > 0 && f->addr != addr) {
 1902:             continue;
 1903:         }
 1904:         if (f->port != NULL && (port == NULL || strcmp(f->port, port) != 0)) {
 1905:             continue;
 1906:         }
 1907: 
 1908:         if (f->vendor_id > 0 && f->vendor_id != vendor_id) {
 1909:             continue;
 1910:         }
 1911: 
 1912:         if (f->product_id > 0 && f->product_id != product_id) {
 1913:             continue;
 1914:         }
 1915:         /* We got a match */
 1916:         s->seen++;
 1917:         if (s->errcount >= 3) {
 1918:             return 0;
 1919:         }
 1920: 
 1921:         /* Already attached ? */
 1922:         if (s->fd != -1) {
 1923:             return 0;
 1924:         }
 1925:         DPRINTF("husb: auto open: bus_num %d addr %d\n", bus_num, addr);
 1926: 
 1927:         if (usb_host_open(s, bus_num, addr, port, product_name, speed) < 0) {
 1928:             s->errcount++;
 1929:         }
 1930:         break;
 1931:     }
 1932: 
 1933:     return 0;
 1934: }
 1935: 
 1936: static void usb_host_auto_check(void *unused)
 1937: {
 1938:     struct USBHostDevice *s;
 1939:     int unconnected = 0;
 1940: 
 1941:     usb_host_scan(NULL, usb_host_auto_scan);
 1942: 
 1943:     QTAILQ_FOREACH(s, &hostdevs, next) {
 1944:         if (s->fd == -1) {
 1945:             unconnected++;
 1946:         }
 1947:         if (s->seen == 0) {
 1948:             s->errcount = 0;
 1949:         }
 1950:         s->seen = 0;
 1951:     }
 1952: 
 1953:     if (unconnected == 0) {
 1954:         /* nothing to watch */
 1955:         if (usb_auto_timer) {
 1956:             qemu_del_timer(usb_auto_timer);
 1957:             trace_usb_host_auto_scan_disabled();
 1958:         }
 1959:         return;
 1960:     }
 1961: 
 1962:     if (!usb_auto_timer) {
 1963:         usb_auto_timer = qemu_new_timer_ms(rt_clock, usb_host_auto_check, NULL);
 1964:         if (!usb_auto_timer) {
 1965:             return;
 1966:         }
 1967:         trace_usb_host_auto_scan_enabled();
 1968:     }
 1969:     qemu_mod_timer(usb_auto_timer, qemu_get_clock_ms(rt_clock) + 2000);
 1970: }
 1971: 
 1972: /*
 1973:  * Autoconnect filter
 1974:  * Format:
 1975:  *    auto:bus:dev[:vid:pid]
 1976:  *    auto:bus.dev[:vid:pid]
 1977:  *
 1978:  *    bus  - bus number    (dec, * means any)
 1979:  *    dev  - device number (dec, * means any)
 1980:  *    vid  - vendor id     (hex, * means any)
 1981:  *    pid  - product id    (hex, * means any)
 1982:  *
 1983:  *    See 'lsusb' output.
 1984:  */
 1985: static int parse_filter(const char *spec, struct USBAutoFilter *f)
 1986: {
 1987:     enum { BUS, DEV, VID, PID, DONE };
 1988:     const char *p = spec;
 1989:     int i;
 1990: 
 1991:     f->bus_num    = 0;
 1992:     f->addr       = 0;
 1993:     f->vendor_id  = 0;
 1994:     f->product_id = 0;
 1995: 
 1996:     for (i = BUS; i < DONE; i++) {
 1997:         p = strpbrk(p, ":.");
 1998:         if (!p) {
 1999:             break;
 2000:         }
 2001:         p++;
 2002: 
 2003:         if (*p == '*') {
 2004:             continue;
 2005:         }
 2006:         switch(i) {
 2007:         case BUS: f->bus_num = strtol(p, NULL, 10);    break;
 2008:         case DEV: f->addr    = strtol(p, NULL, 10);    break;
 2009:         case VID: f->vendor_id  = strtol(p, NULL, 16); break;
 2010:         case PID: f->product_id = strtol(p, NULL, 16); break;
 2011:         }
 2012:     }
 2013: 
 2014:     if (i < DEV) {
 2015:         fprintf(stderr, "husb: invalid auto filter spec %s\n", spec);
 2016:         return -1;
 2017:     }
 2018: 
 2019:     return 0;
 2020: }
 2021: 
 2022: /**********************/
 2023: /* USB host device info */
 2024: 
 2025: struct usb_class_info {
 2026:     int class;
 2027:     const char *class_name;
 2028: };
 2029: 
 2030: static const struct usb_class_info usb_class_info[] = {
 2031:     { USB_CLASS_AUDIO, "Audio"},
 2032:     { USB_CLASS_COMM, "Communication"},
 2033:     { USB_CLASS_HID, "HID"},
 2034:     { USB_CLASS_HUB, "Hub" },
 2035:     { USB_CLASS_PHYSICAL, "Physical" },
 2036:     { USB_CLASS_PRINTER, "Printer" },
 2037:     { USB_CLASS_MASS_STORAGE, "Storage" },
 2038:     { USB_CLASS_CDC_DATA, "Data" },
 2039:     { USB_CLASS_APP_SPEC, "Application Specific" },
 2040:     { USB_CLASS_VENDOR_SPEC, "Vendor Specific" },
 2041:     { USB_CLASS_STILL_IMAGE, "Still Image" },
 2042:     { USB_CLASS_CSCID, "Smart Card" },
 2043:     { USB_CLASS_CONTENT_SEC, "Content Security" },
 2044:     { -1, NULL }
 2045: };
 2046: 
 2047: static const char *usb_class_str(uint8_t class)
 2048: {
 2049:     const struct usb_class_info *p;
 2050:     for(p = usb_class_info; p->class != -1; p++) {
 2051:         if (p->class == class) {
 2052:             break;
 2053:         }
 2054:     }
 2055:     return p->class_name;
 2056: }
 2057: 
 2058: static void usb_info_device(Monitor *mon, int bus_num,
 2059:                             int addr, const char *port,
 2060:                             int class_id, int vendor_id, int product_id,
 2061:                             const char *product_name,
 2062:                             int speed)
 2063: {
 2064:     const char *class_str, *speed_str;
 2065: 
 2066:     switch(speed) {
 2067:     case USB_SPEED_LOW:
 2068:         speed_str = "1.5";
 2069:         break;
 2070:     case USB_SPEED_FULL:
 2071:         speed_str = "12";
 2072:         break;
 2073:     case USB_SPEED_HIGH:
 2074:         speed_str = "480";
 2075:         break;
 2076:     case USB_SPEED_SUPER:
 2077:         speed_str = "5000";
 2078:         break;
 2079:     default:
 2080:         speed_str = "?";
 2081:         break;
 2082:     }
 2083: 
 2084:     monitor_printf(mon, "  Bus %d, Addr %d, Port %s, Speed %s Mb/s\n",
 2085:                    bus_num, addr, port, speed_str);
 2086:     class_str = usb_class_str(class_id);
 2087:     if (class_str) {
 2088:         monitor_printf(mon, "    %s:", class_str);
 2089:     } else {
 2090:         monitor_printf(mon, "    Class %02x:", class_id);
 2091:     }
 2092:     monitor_printf(mon, " USB device %04x:%04x", vendor_id, product_id);
 2093:     if (product_name[0] != '\0') {
 2094:         monitor_printf(mon, ", %s", product_name);
 2095:     }
 2096:     monitor_printf(mon, "\n");
 2097: }
 2098: 
 2099: static int usb_host_info_device(void *opaque, int bus_num, int addr,
 2100:                                 const char *path, int class_id,
 2101:                                 int vendor_id, int product_id,
 2102:                                 const char *product_name,
 2103:                                 int speed)
 2104: {
 2105:     Monitor *mon = opaque;
 2106: 
 2107:     usb_info_device(mon, bus_num, addr, path, class_id, vendor_id, product_id,
 2108:                     product_name, speed);
 2109:     return 0;
 2110: }
 2111: 
 2112: static void dec2str(int val, char *str, size_t size)
 2113: {
 2114:     if (val == 0) {
 2115:         snprintf(str, size, "*");
 2116:     } else {
 2117:         snprintf(str, size, "%d", val);
 2118:     }
 2119: }
 2120: 
 2121: static void hex2str(int val, char *str, size_t size)
 2122: {
 2123:     if (val == 0) {
 2124:         snprintf(str, size, "*");
 2125:     } else {
 2126:         snprintf(str, size, "%04x", val);
 2127:     }
 2128: }
 2129: 
 2130: void usb_host_info(Monitor *mon)
 2131: {
 2132:     struct USBAutoFilter *f;
 2133:     struct USBHostDevice *s;
 2134: 
 2135:     usb_host_scan(mon, usb_host_info_device);
 2136: 
 2137:     if (QTAILQ_EMPTY(&hostdevs)) {
 2138:         return;
 2139:     }
 2140: 
 2141:     monitor_printf(mon, "  Auto filters:\n");
 2142:     QTAILQ_FOREACH(s, &hostdevs, next) {
 2143:         char bus[10], addr[10], vid[10], pid[10];
 2144:         f = &s->match;
 2145:         dec2str(f->bus_num, bus, sizeof(bus));
 2146:         dec2str(f->addr, addr, sizeof(addr));
 2147:         hex2str(f->vendor_id, vid, sizeof(vid));
 2148:         hex2str(f->product_id, pid, sizeof(pid));
 2149:         monitor_printf(mon, "    Bus %s, Addr %s, Port %s, ID %s:%s\n",
 2150:                        bus, addr, f->port ? f->port : "*", vid, pid);
 2151:     }
 2152: }

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