hw/usb/dev-bluetooth.c

   1 /*
   2  * QEMU Bluetooth HCI USB Transport Layer v1.0
   3  *
   4  * Copyright (C) 2007 OpenMoko, Inc.
   5  * Copyright (C) 2008 Andrzej Zaborowski  <balrog@zabor.org>
   6  *
   7  * This program is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU General Public License as
   9  * published by the Free Software Foundation; either version 2 or
  10  * (at your option) version 3 of the License.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License along
  18  * with this program; if not, see <http://www.gnu.org/licenses/>.
  19  */
  20
  21 #include "qemu-common.h"
  22 #include "qemu/error-report.h"
  23 #include "hw/usb.h"
  24 #include "hw/usb/desc.h"
  25 #include "sysemu/bt.h"
  26 #include "hw/bt.h"
  27
  28 struct USBBtState {
  29     USBDevice dev;
  30     struct HCIInfo *hci;
  31     USBEndpoint *intr;
  32
  33     int config;
  34
  35 #define CFIFO_LEN_MASK  255
  36 #define DFIFO_LEN_MASK  4095
  37     struct usb_hci_in_fifo_s {
  38         uint8_t data[(DFIFO_LEN_MASK + 1) * 2];
  39         struct {
  40             uint8_t *data;
  41             int len;
  42         } fifo[CFIFO_LEN_MASK + 1];
  43         int dstart, dlen, dsize, start, len;
  44     } evt, acl, sco;
  45
  46     struct usb_hci_out_fifo_s {
  47         uint8_t data[4096];
  48         int len;
  49     } outcmd, outacl, outsco;
  50 };
  51
  52 #define USB_EVT_EP      1
  53 #define USB_ACL_EP      2
  54 #define USB_SCO_EP      3
  55
  56 enum {
  57     STR_MANUFACTURER = 1,
  58     STR_SERIALNUMBER,
  59 };
  60
  61 static const USBDescStrings desc_strings = {
  62     [STR_MANUFACTURER]     = "QEMU",
  63     [STR_SERIALNUMBER]     = "1",
  64 };
  65
  66 static const USBDescIface desc_iface_bluetooth[] = {
  67     {
  68         .bInterfaceNumber              = 0,
  69         .bNumEndpoints                 = 3,
  70         .bInterfaceClass               = 0xe0, /* Wireless */
  71         .bInterfaceSubClass            = 0x01, /* Radio Frequency */
  72         .bInterfaceProtocol            = 0x01, /* Bluetooth */
  73         .eps = (USBDescEndpoint[]) {
  74             {
  75                 .bEndpointAddress      = USB_DIR_IN | USB_EVT_EP,
  76                 .bmAttributes          = USB_ENDPOINT_XFER_INT,
  77                 .wMaxPacketSize        = 0x10,
  78                 .bInterval             = 0x02,
  79             },
  80             {
  81                 .bEndpointAddress      = USB_DIR_OUT | USB_ACL_EP,
  82                 .bmAttributes          = USB_ENDPOINT_XFER_BULK,
  83                 .wMaxPacketSize        = 0x40,
  84                 .bInterval             = 0x0a,
  85             },
  86             {
  87                 .bEndpointAddress      = USB_DIR_IN | USB_ACL_EP,
  88                 .bmAttributes          = USB_ENDPOINT_XFER_BULK,
  89                 .wMaxPacketSize        = 0x40,
  90                 .bInterval             = 0x0a,
  91             },
  92         },
  93     },{
  94         .bInterfaceNumber              = 1,
  95         .bAlternateSetting             = 0,
  96         .bNumEndpoints                 = 2,
  97         .bInterfaceClass               = 0xe0, /* Wireless */
  98         .bInterfaceSubClass            = 0x01, /* Radio Frequency */
  99         .bInterfaceProtocol            = 0x01, /* Bluetooth */
 100         .eps = (USBDescEndpoint[]) {
 101             {
 102                 .bEndpointAddress      = USB_DIR_OUT | USB_SCO_EP,
 103                 .bmAttributes          = USB_ENDPOINT_XFER_ISOC,
 104                 .wMaxPacketSize        = 0,
 105                 .bInterval             = 0x01,
 106             },
 107             {
 108                 .bEndpointAddress      = USB_DIR_IN | USB_SCO_EP,
 109                 .bmAttributes          = USB_ENDPOINT_XFER_ISOC,
 110                 .wMaxPacketSize        = 0,
 111                 .bInterval             = 0x01,
 112             },
 113         },
 114     },{
 115         .bInterfaceNumber              = 1,
 116         .bAlternateSetting             = 1,
 117         .bNumEndpoints                 = 2,
 118         .bInterfaceClass               = 0xe0, /* Wireless */
 119         .bInterfaceSubClass            = 0x01, /* Radio Frequency */
 120         .bInterfaceProtocol            = 0x01, /* Bluetooth */
 121         .eps = (USBDescEndpoint[]) {
 122             {
 123                 .bEndpointAddress      = USB_DIR_OUT | USB_SCO_EP,
 124                 .bmAttributes          = USB_ENDPOINT_XFER_ISOC,
 125                 .wMaxPacketSize        = 0x09,
 126                 .bInterval             = 0x01,
 127             },
 128             {
 129                 .bEndpointAddress      = USB_DIR_IN | USB_SCO_EP,
 130                 .bmAttributes          = USB_ENDPOINT_XFER_ISOC,
 131                 .wMaxPacketSize        = 0x09,
 132                 .bInterval             = 0x01,
 133             },
 134         },
 135     },{
 136         .bInterfaceNumber              = 1,
 137         .bAlternateSetting             = 2,
 138         .bNumEndpoints                 = 2,
 139         .bInterfaceClass               = 0xe0, /* Wireless */
 140         .bInterfaceSubClass            = 0x01, /* Radio Frequency */
 141         .bInterfaceProtocol            = 0x01, /* Bluetooth */
 142         .eps = (USBDescEndpoint[]) {
 143             {
 144                 .bEndpointAddress      = USB_DIR_OUT | USB_SCO_EP,
 145                 .bmAttributes          = USB_ENDPOINT_XFER_ISOC,
 146                 .wMaxPacketSize        = 0x11,
 147                 .bInterval             = 0x01,
 148             },
 149             {
 150                 .bEndpointAddress      = USB_DIR_IN | USB_SCO_EP,
 151                 .bmAttributes          = USB_ENDPOINT_XFER_ISOC,
 152                 .wMaxPacketSize        = 0x11,
 153                 .bInterval             = 0x01,
 154             },
 155         },
 156     },{
 157         .bInterfaceNumber              = 1,
 158         .bAlternateSetting             = 3,
 159         .bNumEndpoints                 = 2,
 160         .bInterfaceClass               = 0xe0, /* Wireless */
 161         .bInterfaceSubClass            = 0x01, /* Radio Frequency */
 162         .bInterfaceProtocol            = 0x01, /* Bluetooth */
 163         .eps = (USBDescEndpoint[]) {
 164             {
 165                 .bEndpointAddress      = USB_DIR_OUT | USB_SCO_EP,
 166                 .bmAttributes          = USB_ENDPOINT_XFER_ISOC,
 167                 .wMaxPacketSize        = 0x19,
 168                 .bInterval             = 0x01,
 169             },
 170             {
 171                 .bEndpointAddress      = USB_DIR_IN | USB_SCO_EP,
 172                 .bmAttributes          = USB_ENDPOINT_XFER_ISOC,
 173                 .wMaxPacketSize        = 0x19,
 174                 .bInterval             = 0x01,
 175             },
 176         },
 177     },{
 178         .bInterfaceNumber              = 1,
 179         .bAlternateSetting             = 4,
 180         .bNumEndpoints                 = 2,
 181         .bInterfaceClass               = 0xe0, /* Wireless */
 182         .bInterfaceSubClass            = 0x01, /* Radio Frequency */
 183         .bInterfaceProtocol            = 0x01, /* Bluetooth */
 184         .eps = (USBDescEndpoint[]) {
 185             {
 186                 .bEndpointAddress      = USB_DIR_OUT | USB_SCO_EP,
 187                 .bmAttributes          = USB_ENDPOINT_XFER_ISOC,
 188                 .wMaxPacketSize        = 0x21,
 189                 .bInterval             = 0x01,
 190             },
 191             {
 192                 .bEndpointAddress      = USB_DIR_IN | USB_SCO_EP,
 193                 .bmAttributes          = USB_ENDPOINT_XFER_ISOC,
 194                 .wMaxPacketSize        = 0x21,
 195                 .bInterval             = 0x01,
 196             },
 197         },
 198     },{
 199         .bInterfaceNumber              = 1,
 200         .bAlternateSetting             = 5,
 201         .bNumEndpoints                 = 2,
 202         .bInterfaceClass               = 0xe0, /* Wireless */
 203         .bInterfaceSubClass            = 0x01, /* Radio Frequency */
 204         .bInterfaceProtocol            = 0x01, /* Bluetooth */
 205         .eps = (USBDescEndpoint[]) {
 206             {
 207                 .bEndpointAddress      = USB_DIR_OUT | USB_SCO_EP,
 208                 .bmAttributes          = USB_ENDPOINT_XFER_ISOC,
 209                 .wMaxPacketSize        = 0x31,
 210                 .bInterval             = 0x01,
 211             },
 212             {
 213                 .bEndpointAddress      = USB_DIR_IN | USB_SCO_EP,
 214                 .bmAttributes          = USB_ENDPOINT_XFER_ISOC,
 215                 .wMaxPacketSize        = 0x31,
 216                 .bInterval             = 0x01,
 217             },
 218         },
 219     }
 220 };
 221
 222 static const USBDescDevice desc_device_bluetooth = {
 223     .bcdUSB                        = 0x0110,
 224     .bDeviceClass                  = 0xe0, /* Wireless */
 225     .bDeviceSubClass               = 0x01, /* Radio Frequency */
 226     .bDeviceProtocol               = 0x01, /* Bluetooth */
 227     .bMaxPacketSize0               = 64,
 228     .bNumConfigurations            = 1,
 229     .confs = (USBDescConfig[]) {
 230         {
 231             .bNumInterfaces        = 2,
 232             .bConfigurationValue   = 1,
 233             .bmAttributes          = USB_CFG_ATT_ONE | USB_CFG_ATT_SELFPOWER,
 234             .bMaxPower             = 0,
 235             .nif = ARRAY_SIZE(desc_iface_bluetooth),
 236             .ifs = desc_iface_bluetooth,
 237         },
 238     },
 239 };
 240
 241 static const USBDesc desc_bluetooth = {
 242     .id = {
 243         .idVendor          = 0x0a12,
 244         .idProduct         = 0x0001,
 245         .bcdDevice         = 0x1958,
 246         .iManufacturer     = STR_MANUFACTURER,
 247         .iProduct          = 0,
 248         .iSerialNumber     = STR_SERIALNUMBER,
 249     },
 250     .full = &desc_device_bluetooth,
 251     .str  = desc_strings,
 252 };
 253
 254 static void usb_bt_fifo_reset(struct usb_hci_in_fifo_s *fifo)
 255 {
 256     fifo->dstart = 0;
 257     fifo->dlen = 0;
 258     fifo->dsize = DFIFO_LEN_MASK + 1;
 259     fifo->start = 0;
 260     fifo->len = 0;
 261 }
 262
 263 static void usb_bt_fifo_enqueue(struct usb_hci_in_fifo_s *fifo,
 264                 const uint8_t *data, int len)
 265 {
 266     int off = fifo->dstart + fifo->dlen;
 267     uint8_t *buf;
 268
 269     fifo->dlen += len;
 270     if (off <= DFIFO_LEN_MASK) {
 271         if (off + len > DFIFO_LEN_MASK + 1 &&
 272                         (fifo->dsize = off + len) > (DFIFO_LEN_MASK + 1) * 2) {
 273             fprintf(stderr, "%s: can't alloc %i bytes\n", __FUNCTION__, len);
 274             exit(-1);
 275         }
 276         buf = fifo->data + off;
 277     } else {
 278         if (fifo->dlen > fifo->dsize) {
 279             fprintf(stderr, "%s: can't alloc %i bytes\n", __FUNCTION__, len);
 280             exit(-1);
 281         }
 282         buf = fifo->data + off - fifo->dsize;
 283     }
 284
 285     off = (fifo->start + fifo->len ++) & CFIFO_LEN_MASK;
 286     fifo->fifo[off].data = memcpy(buf, data, len);
 287     fifo->fifo[off].len = len;
 288 }
 289
 290 static inline void usb_bt_fifo_dequeue(struct usb_hci_in_fifo_s *fifo,
 291                 USBPacket *p)
 292 {
 293     int len;
 294
 295     assert(fifo->len != 0);
 296
 297     len = MIN(p->iov.size, fifo->fifo[fifo->start].len);
 298     usb_packet_copy(p, fifo->fifo[fifo->start].data, len);
 299     if (len == p->iov.size) {
 300         fifo->fifo[fifo->start].len -= len;
 301         fifo->fifo[fifo->start].data += len;
 302     } else {
 303         fifo->start ++;
 304         fifo->start &= CFIFO_LEN_MASK;
 305         fifo->len --;
 306     }
 307
 308     fifo->dstart += len;
 309     fifo->dlen -= len;
 310     if (fifo->dstart >= fifo->dsize) {
 311         fifo->dstart = 0;
 312         fifo->dsize = DFIFO_LEN_MASK + 1;
 313     }
 314 }
 315
 316 static inline void usb_bt_fifo_out_enqueue(struct USBBtState *s,
 317                 struct usb_hci_out_fifo_s *fifo,
 318                 void (*send)(struct HCIInfo *, const uint8_t *, int),
 319                 int (*complete)(const uint8_t *, int),
 320                 USBPacket *p)
 321 {
 322     usb_packet_copy(p, fifo->data + fifo->len, p->iov.size);
 323     fifo->len += p->iov.size;
 324     if (complete(fifo->data, fifo->len)) {
 325         send(s->hci, fifo->data, fifo->len);
 326         fifo->len = 0;
 327     }
 328
 329     /* TODO: do we need to loop? */
 330 }
 331
 332 static int usb_bt_hci_cmd_complete(const uint8_t *data, int len)
 333 {
 334     len -= HCI_COMMAND_HDR_SIZE;
 335     return len >= 0 &&
 336             len >= ((struct hci_command_hdr *) data)->plen;
 337 }
 338
 339 static int usb_bt_hci_acl_complete(const uint8_t *data, int len)
 340 {
 341     len -= HCI_ACL_HDR_SIZE;
 342     return len >= 0 &&
 343             len >= le16_to_cpu(((struct hci_acl_hdr *) data)->dlen);
 344 }
 345
 346 static int usb_bt_hci_sco_complete(const uint8_t *data, int len)
 347 {
 348     len -= HCI_SCO_HDR_SIZE;
 349     return len >= 0 &&
 350             len >= ((struct hci_sco_hdr *) data)->dlen;
 351 }
 352
 353 static void usb_bt_handle_reset(USBDevice *dev)
 354 {
 355     struct USBBtState *s = (struct USBBtState *) dev->opaque;
 356
 357     usb_bt_fifo_reset(&s->evt);
 358     usb_bt_fifo_reset(&s->acl);
 359     usb_bt_fifo_reset(&s->sco);
 360     s->outcmd.len = 0;
 361     s->outacl.len = 0;
 362     s->outsco.len = 0;
 363 }
 364
 365 static void usb_bt_handle_control(USBDevice *dev, USBPacket *p,
 366                int request, int value, int index, int length, uint8_t *data)
 367 {
 368     struct USBBtState *s = (struct USBBtState *) dev->opaque;
 369     int ret;
 370
 371     ret = usb_desc_handle_control(dev, p, request, value, index, length, data);
 372     if (ret >= 0) {
 373         switch (request) {
 374         case DeviceRequest | USB_REQ_GET_CONFIGURATION:
 375             s->config = 0;
 376             break;
 377         case DeviceOutRequest | USB_REQ_SET_CONFIGURATION:
 378             s->config = 1;
 379             usb_bt_fifo_reset(&s->evt);
 380             usb_bt_fifo_reset(&s->acl);
 381             usb_bt_fifo_reset(&s->sco);
 382             break;
 383         }
 384         return;
 385     }
 386
 387     switch (request) {
 388     case InterfaceRequest | USB_REQ_GET_STATUS:
 389     case EndpointRequest | USB_REQ_GET_STATUS:
 390         data[0] = 0x00;
 391         data[1] = 0x00;
 392         p->actual_length = 2;
 393         break;
 394     case InterfaceOutRequest | USB_REQ_CLEAR_FEATURE:
 395     case EndpointOutRequest | USB_REQ_CLEAR_FEATURE:
 396         goto fail;
 397     case InterfaceOutRequest | USB_REQ_SET_FEATURE:
 398     case EndpointOutRequest | USB_REQ_SET_FEATURE:
 399         goto fail;
 400         break;
 401     case ((USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_DEVICE) << 8):
 402         if (s->config)
 403             usb_bt_fifo_out_enqueue(s, &s->outcmd, s->hci->cmd_send,
 404                             usb_bt_hci_cmd_complete, p);
 405         break;
 406     default:
 407     fail:
 408         p->status = USB_RET_STALL;
 409         break;
 410     }
 411 }
 412
 413 static void usb_bt_handle_data(USBDevice *dev, USBPacket *p)
 414 {
 415     struct USBBtState *s = (struct USBBtState *) dev->opaque;
 416
 417     if (!s->config)
 418         goto fail;
 419
 420     switch (p->pid) {
 421     case USB_TOKEN_IN:
 422         switch (p->ep->nr) {
 423         case USB_EVT_EP:
 424             if (s->evt.len == 0) {
 425                 p->status = USB_RET_NAK;
 426                 break;
 427             }
 428             usb_bt_fifo_dequeue(&s->evt, p);
 429             break;
 430
 431         case USB_ACL_EP:
 432             if (s->evt.len == 0) {
 433                 p->status = USB_RET_STALL;
 434                 break;
 435             }
 436             usb_bt_fifo_dequeue(&s->acl, p);
 437             break;
 438
 439         case USB_SCO_EP:
 440             if (s->evt.len == 0) {
 441                 p->status = USB_RET_STALL;
 442                 break;
 443             }
 444             usb_bt_fifo_dequeue(&s->sco, p);
 445             break;
 446
 447         default:
 448             goto fail;
 449         }
 450         break;
 451
 452     case USB_TOKEN_OUT:
 453         switch (p->ep->nr) {
 454         case USB_ACL_EP:
 455             usb_bt_fifo_out_enqueue(s, &s->outacl, s->hci->acl_send,
 456                             usb_bt_hci_acl_complete, p);
 457             break;
 458
 459         case USB_SCO_EP:
 460             usb_bt_fifo_out_enqueue(s, &s->outsco, s->hci->sco_send,
 461                             usb_bt_hci_sco_complete, p);
 462             break;
 463
 464         default:
 465             goto fail;
 466         }
 467         break;
 468
 469     default:
 470     fail:
 471         p->status = USB_RET_STALL;
 472         break;
 473     }
 474 }
 475
 476 static void usb_bt_out_hci_packet_event(void *opaque,
 477                 const uint8_t *data, int len)
 478 {
 479     struct USBBtState *s = (struct USBBtState *) opaque;
 480
 481     if (s->evt.len == 0) {
 482         usb_wakeup(s->intr, 0);
 483     }
 484     usb_bt_fifo_enqueue(&s->evt, data, len);
 485 }
 486
 487 static void usb_bt_out_hci_packet_acl(void *opaque,
 488                 const uint8_t *data, int len)
 489 {
 490     struct USBBtState *s = (struct USBBtState *) opaque;
 491
 492     usb_bt_fifo_enqueue(&s->acl, data, len);
 493 }
 494
 495 static void usb_bt_handle_destroy(USBDevice *dev)
 496 {
 497     struct USBBtState *s = (struct USBBtState *) dev->opaque;
 498
 499     s->hci->opaque = NULL;
 500     s->hci->evt_recv = NULL;
 501     s->hci->acl_recv = NULL;
 502 }
 503
 504 static void usb_bt_realize(USBDevice *dev, Error **errp)
 505 {
 506     struct USBBtState *s = DO_UPCAST(struct USBBtState, dev, dev);
 507
 508     usb_desc_create_serial(dev);
 509     usb_desc_init(dev);
 510     s->dev.opaque = s;
 511     if (!s->hci) {
 512         s->hci = bt_new_hci(qemu_find_bt_vlan(0));
 513     }
 514     s->hci->opaque = s;
 515     s->hci->evt_recv = usb_bt_out_hci_packet_event;
 516     s->hci->acl_recv = usb_bt_out_hci_packet_acl;
 517     usb_bt_handle_reset(&s->dev);
 518     s->intr = usb_ep_get(dev, USB_TOKEN_IN, USB_EVT_EP);
 519 }
 520
 521 static USBDevice *usb_bt_init(USBBus *bus, const char *cmdline)
 522 {
 523     USBDevice *dev;
 524     struct USBBtState *s;
 525     HCIInfo *hci;
 526     const char *name = "usb-bt-dongle";
 527
 528     if (*cmdline) {
 529         hci = hci_init(cmdline);
 530     } else {
 531         hci = bt_new_hci(qemu_find_bt_vlan(0));
 532     }
 533     if (!hci)
 534         return NULL;
 535
 536     dev = usb_create(bus, name);
 537     s = DO_UPCAST(struct USBBtState, dev, dev);
 538     s->hci = hci;
 539     return dev;
 540 }
 541
 542 static const VMStateDescription vmstate_usb_bt = {
 543     .name = "usb-bt",
 544     .unmigratable = 1,
 545 };
 546
 547 static void usb_bt_class_initfn(ObjectClass *klass, void *data)
 548 {
 549     DeviceClass *dc = DEVICE_CLASS(klass);
 550     USBDeviceClass *uc = USB_DEVICE_CLASS(klass);
 551
 552     uc->realize        = usb_bt_realize;
 553     uc->product_desc   = "QEMU BT dongle";
 554     uc->usb_desc       = &desc_bluetooth;
 555     uc->handle_reset   = usb_bt_handle_reset;
 556     uc->handle_control = usb_bt_handle_control;
 557     uc->handle_data    = usb_bt_handle_data;
 558     uc->handle_destroy = usb_bt_handle_destroy;
 559     dc->vmsd = &vmstate_usb_bt;
 560     set_bit(DEVICE_CATEGORY_NETWORK, dc->categories);
 561 }
 562
 563 static const TypeInfo bt_info = {
 564     .name          = "usb-bt-dongle",
 565     .parent        = TYPE_USB_DEVICE,
 566     .instance_size = sizeof(struct USBBtState),
 567     .class_init    = usb_bt_class_initfn,
 568 };
 569
 570 static void usb_bt_register_types(void)
 571 {
 572     type_register_static(&bt_info);
 573     usb_legacy_register("usb-bt-dongle", "bt", usb_bt_init);
 574 }
 575
 576 type_init(usb_bt_register_types)