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 "hw/usb.h"
  23 #include "hw/usb/desc.h"
  24 #include "bt/bt.h"
  25 #include "hw/bt.h"
  26
  27 struct USBBtState {
  28     USBDevice dev;
  29     struct HCIInfo *hci;
  30     USBEndpoint *intr;
  31
  32     int config;
  33
  34 #define CFIFO_LEN_MASK  255
  35 #define DFIFO_LEN_MASK  4095
  36     struct usb_hci_in_fifo_s {
  37         uint8_t data[(DFIFO_LEN_MASK + 1) * 2];
  38         struct {
  39             uint8_t *data;
  40             int len;
  41         } fifo[CFIFO_LEN_MASK + 1];
  42         int dstart, dlen, dsize, start, len;
  43     } evt, acl, sco;
  44
  45     struct usb_hci_out_fifo_s {
  46         uint8_t data[4096];
  47         int len;
  48     } outcmd, outacl, outsco;
  49 };
  50
  51 #define USB_EVT_EP      1
  52 #define USB_ACL_EP      2
  53 #define USB_SCO_EP      3
  54
  55 enum {
  56     STR_MANUFACTURER = 1,
  57     STR_SERIALNUMBER,
  58 };
  59
  60 static const USBDescStrings desc_strings = {
  61     [STR_MANUFACTURER]     = "QEMU",
  62     [STR_SERIALNUMBER]     = "1",
  63 };
  64
  65 static const USBDescIface desc_iface_bluetooth[] = {
  66     {
  67         .bInterfaceNumber              = 0,
  68         .bNumEndpoints                 = 3,
  69         .bInterfaceClass               = 0xe0, /* Wireless */
  70         .bInterfaceSubClass            = 0x01, /* Radio Frequency */
  71         .bInterfaceProtocol            = 0x01, /* Bluetooth */
  72         .eps = (USBDescEndpoint[]) {
  73             {
  74                 .bEndpointAddress      = USB_DIR_IN | USB_EVT_EP,
  75                 .bmAttributes          = USB_ENDPOINT_XFER_INT,
  76                 .wMaxPacketSize        = 0x10,
  77                 .bInterval             = 0x02,
  78             },
  79             {
  80                 .bEndpointAddress      = USB_DIR_OUT | USB_ACL_EP,
  81                 .bmAttributes          = USB_ENDPOINT_XFER_BULK,
  82                 .wMaxPacketSize        = 0x40,
  83                 .bInterval             = 0x0a,
  84             },
  85             {
  86                 .bEndpointAddress      = USB_DIR_IN | USB_ACL_EP,
  87                 .bmAttributes          = USB_ENDPOINT_XFER_BULK,
  88                 .wMaxPacketSize        = 0x40,
  89                 .bInterval             = 0x0a,
  90             },
  91         },
  92     },{
  93         .bInterfaceNumber              = 1,
  94         .bAlternateSetting             = 0,
  95         .bNumEndpoints                 = 2,
  96         .bInterfaceClass               = 0xe0, /* Wireless */
  97         .bInterfaceSubClass            = 0x01, /* Radio Frequency */
  98         .bInterfaceProtocol            = 0x01, /* Bluetooth */
  99         .eps = (USBDescEndpoint[]) {
 100             {
 101                 .bEndpointAddress      = USB_DIR_OUT | USB_SCO_EP,
 102                 .bmAttributes          = USB_ENDPOINT_XFER_ISOC,
 103                 .wMaxPacketSize        = 0,
 104                 .bInterval             = 0x01,
 105             },
 106             {
 107                 .bEndpointAddress      = USB_DIR_IN | USB_SCO_EP,
 108                 .bmAttributes          = USB_ENDPOINT_XFER_ISOC,
 109                 .wMaxPacketSize        = 0,
 110                 .bInterval             = 0x01,
 111             },
 112         },
 113     },{
 114         .bInterfaceNumber              = 1,
 115         .bAlternateSetting             = 1,
 116         .bNumEndpoints                 = 2,
 117         .bInterfaceClass               = 0xe0, /* Wireless */
 118         .bInterfaceSubClass            = 0x01, /* Radio Frequency */
 119         .bInterfaceProtocol            = 0x01, /* Bluetooth */
 120         .eps = (USBDescEndpoint[]) {
 121             {
 122                 .bEndpointAddress      = USB_DIR_OUT | USB_SCO_EP,
 123                 .bmAttributes          = USB_ENDPOINT_XFER_ISOC,
 124                 .wMaxPacketSize        = 0x09,
 125                 .bInterval             = 0x01,
 126             },
 127             {
 128                 .bEndpointAddress      = USB_DIR_IN | USB_SCO_EP,
 129                 .bmAttributes          = USB_ENDPOINT_XFER_ISOC,
 130                 .wMaxPacketSize        = 0x09,
 131                 .bInterval             = 0x01,
 132             },
 133         },
 134     },{
 135         .bInterfaceNumber              = 1,
 136         .bAlternateSetting             = 2,
 137         .bNumEndpoints                 = 2,
 138         .bInterfaceClass               = 0xe0, /* Wireless */
 139         .bInterfaceSubClass            = 0x01, /* Radio Frequency */
 140         .bInterfaceProtocol            = 0x01, /* Bluetooth */
 141         .eps = (USBDescEndpoint[]) {
 142             {
 143                 .bEndpointAddress      = USB_DIR_OUT | USB_SCO_EP,
 144                 .bmAttributes          = USB_ENDPOINT_XFER_ISOC,
 145                 .wMaxPacketSize        = 0x11,
 146                 .bInterval             = 0x01,
 147             },
 148             {
 149                 .bEndpointAddress      = USB_DIR_IN | USB_SCO_EP,
 150                 .bmAttributes          = USB_ENDPOINT_XFER_ISOC,
 151                 .wMaxPacketSize        = 0x11,
 152                 .bInterval             = 0x01,
 153             },
 154         },
 155     },{
 156         .bInterfaceNumber              = 1,
 157         .bAlternateSetting             = 3,
 158         .bNumEndpoints                 = 2,
 159         .bInterfaceClass               = 0xe0, /* Wireless */
 160         .bInterfaceSubClass            = 0x01, /* Radio Frequency */
 161         .bInterfaceProtocol            = 0x01, /* Bluetooth */
 162         .eps = (USBDescEndpoint[]) {
 163             {
 164                 .bEndpointAddress      = USB_DIR_OUT | USB_SCO_EP,
 165                 .bmAttributes          = USB_ENDPOINT_XFER_ISOC,
 166                 .wMaxPacketSize        = 0x19,
 167                 .bInterval             = 0x01,
 168             },
 169             {
 170                 .bEndpointAddress      = USB_DIR_IN | USB_SCO_EP,
 171                 .bmAttributes          = USB_ENDPOINT_XFER_ISOC,
 172                 .wMaxPacketSize        = 0x19,
 173                 .bInterval             = 0x01,
 174             },
 175         },
 176     },{
 177         .bInterfaceNumber              = 1,
 178         .bAlternateSetting             = 4,
 179         .bNumEndpoints                 = 2,
 180         .bInterfaceClass               = 0xe0, /* Wireless */
 181         .bInterfaceSubClass            = 0x01, /* Radio Frequency */
 182         .bInterfaceProtocol            = 0x01, /* Bluetooth */
 183         .eps = (USBDescEndpoint[]) {
 184             {
 185                 .bEndpointAddress      = USB_DIR_OUT | USB_SCO_EP,
 186                 .bmAttributes          = USB_ENDPOINT_XFER_ISOC,
 187                 .wMaxPacketSize        = 0x21,
 188                 .bInterval             = 0x01,
 189             },
 190             {
 191                 .bEndpointAddress      = USB_DIR_IN | USB_SCO_EP,
 192                 .bmAttributes          = USB_ENDPOINT_XFER_ISOC,
 193                 .wMaxPacketSize        = 0x21,
 194                 .bInterval             = 0x01,
 195             },
 196         },
 197     },{
 198         .bInterfaceNumber              = 1,
 199         .bAlternateSetting             = 5,
 200         .bNumEndpoints                 = 2,
 201         .bInterfaceClass               = 0xe0, /* Wireless */
 202         .bInterfaceSubClass            = 0x01, /* Radio Frequency */
 203         .bInterfaceProtocol            = 0x01, /* Bluetooth */
 204         .eps = (USBDescEndpoint[]) {
 205             {
 206                 .bEndpointAddress      = USB_DIR_OUT | USB_SCO_EP,
 207                 .bmAttributes          = USB_ENDPOINT_XFER_ISOC,
 208                 .wMaxPacketSize        = 0x31,
 209                 .bInterval             = 0x01,
 210             },
 211             {
 212                 .bEndpointAddress      = USB_DIR_IN | USB_SCO_EP,
 213                 .bmAttributes          = USB_ENDPOINT_XFER_ISOC,
 214                 .wMaxPacketSize        = 0x31,
 215                 .bInterval             = 0x01,
 216             },
 217         },
 218     }
 219 };
 220
 221 static const USBDescDevice desc_device_bluetooth = {
 222     .bcdUSB                        = 0x0110,
 223     .bDeviceClass                  = 0xe0, /* Wireless */
 224     .bDeviceSubClass               = 0x01, /* Radio Frequency */
 225     .bDeviceProtocol               = 0x01, /* Bluetooth */
 226     .bMaxPacketSize0               = 64,
 227     .bNumConfigurations            = 1,
 228     .confs = (USBDescConfig[]) {
 229         {
 230             .bNumInterfaces        = 2,
 231             .bConfigurationValue   = 1,
 232             .bmAttributes          = 0xc0,
 233             .bMaxPower             = 0,
 234             .nif = ARRAY_SIZE(desc_iface_bluetooth),
 235             .ifs = desc_iface_bluetooth,
 236         },
 237     },
 238 };
 239
 240 static const USBDesc desc_bluetooth = {
 241     .id = {
 242         .idVendor          = 0x0a12,
 243         .idProduct         = 0x0001,
 244         .bcdDevice         = 0x1958,
 245         .iManufacturer     = STR_MANUFACTURER,
 246         .iProduct          = 0,
 247         .iSerialNumber     = STR_SERIALNUMBER,
 248     },
 249     .full = &desc_device_bluetooth,
 250     .str  = desc_strings,
 251 };
 252
 253 static void usb_bt_fifo_reset(struct usb_hci_in_fifo_s *fifo)
 254 {
 255     fifo->dstart = 0;
 256     fifo->dlen = 0;
 257     fifo->dsize = DFIFO_LEN_MASK + 1;
 258     fifo->start = 0;
 259     fifo->len = 0;
 260 }
 261
 262 static void usb_bt_fifo_enqueue(struct usb_hci_in_fifo_s *fifo,
 263                 const uint8_t *data, int len)
 264 {
 265     int off = fifo->dstart + fifo->dlen;
 266     uint8_t *buf;
 267
 268     fifo->dlen += len;
 269     if (off <= DFIFO_LEN_MASK) {
 270         if (off + len > DFIFO_LEN_MASK + 1 &&
 271                         (fifo->dsize = off + len) > (DFIFO_LEN_MASK + 1) * 2) {
 272             fprintf(stderr, "%s: can't alloc %i bytes\n", __FUNCTION__, len);
 273             exit(-1);
 274         }
 275         buf = fifo->data + off;
 276     } else {
 277         if (fifo->dlen > fifo->dsize) {
 278             fprintf(stderr, "%s: can't alloc %i bytes\n", __FUNCTION__, len);
 279             exit(-1);
 280         }
 281         buf = fifo->data + off - fifo->dsize;
 282     }
 283
 284     off = (fifo->start + fifo->len ++) & CFIFO_LEN_MASK;
 285     fifo->fifo[off].data = memcpy(buf, data, len);
 286     fifo->fifo[off].len = len;
 287 }
 288
 289 static inline void usb_bt_fifo_dequeue(struct usb_hci_in_fifo_s *fifo,
 290                 USBPacket *p)
 291 {
 292     int len;
 293
 294     assert(fifo->len != 0);
 295
 296     len = MIN(p->iov.size, fifo->fifo[fifo->start].len);
 297     usb_packet_copy(p, fifo->fifo[fifo->start].data, len);
 298     if (len == p->iov.size) {
 299         fifo->fifo[fifo->start].len -= len;
 300         fifo->fifo[fifo->start].data += len;
 301     } else {
 302         fifo->start ++;
 303         fifo->start &= CFIFO_LEN_MASK;
 304         fifo->len --;
 305     }
 306
 307     fifo->dstart += len;
 308     fifo->dlen -= len;
 309     if (fifo->dstart >= fifo->dsize) {
 310         fifo->dstart = 0;
 311         fifo->dsize = DFIFO_LEN_MASK + 1;
 312     }
 313 }
 314
 315 static inline void usb_bt_fifo_out_enqueue(struct USBBtState *s,
 316                 struct usb_hci_out_fifo_s *fifo,
 317                 void (*send)(struct HCIInfo *, const uint8_t *, int),
 318                 int (*complete)(const uint8_t *, int),
 319                 USBPacket *p)
 320 {
 321     usb_packet_copy(p, fifo->data + fifo->len, p->iov.size);
 322     fifo->len += p->iov.size;
 323     if (complete(fifo->data, fifo->len)) {
 324         send(s->hci, fifo->data, fifo->len);
 325         fifo->len = 0;
 326     }
 327
 328     /* TODO: do we need to loop? */
 329 }
 330
 331 static int usb_bt_hci_cmd_complete(const uint8_t *data, int len)
 332 {
 333     len -= HCI_COMMAND_HDR_SIZE;
 334     return len >= 0 &&
 335             len >= ((struct hci_command_hdr *) data)->plen;
 336 }
 337
 338 static int usb_bt_hci_acl_complete(const uint8_t *data, int len)
 339 {
 340     len -= HCI_ACL_HDR_SIZE;
 341     return len >= 0 &&
 342             len >= le16_to_cpu(((struct hci_acl_hdr *) data)->dlen);
 343 }
 344
 345 static int usb_bt_hci_sco_complete(const uint8_t *data, int len)
 346 {
 347     len -= HCI_SCO_HDR_SIZE;
 348     return len >= 0 &&
 349             len >= ((struct hci_sco_hdr *) data)->dlen;
 350 }
 351
 352 static void usb_bt_handle_reset(USBDevice *dev)
 353 {
 354     struct USBBtState *s = (struct USBBtState *) dev->opaque;
 355
 356     usb_bt_fifo_reset(&s->evt);
 357     usb_bt_fifo_reset(&s->acl);
 358     usb_bt_fifo_reset(&s->sco);
 359     s->outcmd.len = 0;
 360     s->outacl.len = 0;
 361     s->outsco.len = 0;
 362 }
 363
 364 static void usb_bt_handle_control(USBDevice *dev, USBPacket *p,
 365                int request, int value, int index, int length, uint8_t *data)
 366 {
 367     struct USBBtState *s = (struct USBBtState *) dev->opaque;
 368     int ret;
 369
 370     ret = usb_desc_handle_control(dev, p, request, value, index, length, data);
 371     if (ret >= 0) {
 372         switch (request) {
 373         case DeviceRequest | USB_REQ_GET_CONFIGURATION:
 374             s->config = 0;
 375             break;
 376         case DeviceOutRequest | USB_REQ_SET_CONFIGURATION:
 377             s->config = 1;
 378             usb_bt_fifo_reset(&s->evt);
 379             usb_bt_fifo_reset(&s->acl);
 380             usb_bt_fifo_reset(&s->sco);
 381             break;
 382         }
 383         return;
 384     }
 385
 386     switch (request) {
 387     case InterfaceRequest | USB_REQ_GET_STATUS:
 388     case EndpointRequest | USB_REQ_GET_STATUS:
 389         data[0] = 0x00;
 390         data[1] = 0x00;
 391         p->actual_length = 2;
 392         break;
 393     case InterfaceOutRequest | USB_REQ_CLEAR_FEATURE:
 394     case EndpointOutRequest | USB_REQ_CLEAR_FEATURE:
 395         goto fail;
 396     case InterfaceOutRequest | USB_REQ_SET_FEATURE:
 397     case EndpointOutRequest | USB_REQ_SET_FEATURE:
 398         goto fail;
 399         break;
 400     case ((USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_DEVICE) << 8):
 401         if (s->config)
 402             usb_bt_fifo_out_enqueue(s, &s->outcmd, s->hci->cmd_send,
 403                             usb_bt_hci_cmd_complete, p);
 404         break;
 405     default:
 406     fail:
 407         p->status = USB_RET_STALL;
 408         break;
 409     }
 410 }
 411
 412 static void usb_bt_handle_data(USBDevice *dev, USBPacket *p)
 413 {
 414     struct USBBtState *s = (struct USBBtState *) dev->opaque;
 415
 416     if (!s->config)
 417         goto fail;
 418
 419     switch (p->pid) {
 420     case USB_TOKEN_IN:
 421         switch (p->ep->nr) {
 422         case USB_EVT_EP:
 423             if (s->evt.len == 0) {
 424                 p->status = USB_RET_NAK;
 425                 break;
 426             }
 427             usb_bt_fifo_dequeue(&s->evt, p);
 428             break;
 429
 430         case USB_ACL_EP:
 431             if (s->evt.len == 0) {
 432                 p->status = USB_RET_STALL;
 433                 break;
 434             }
 435             usb_bt_fifo_dequeue(&s->acl, p);
 436             break;
 437
 438         case USB_SCO_EP:
 439             if (s->evt.len == 0) {
 440                 p->status = USB_RET_STALL;
 441                 break;
 442             }
 443             usb_bt_fifo_dequeue(&s->sco, p);
 444             break;
 445
 446         default:
 447             goto fail;
 448         }
 449         break;
 450
 451     case USB_TOKEN_OUT:
 452         switch (p->ep->nr) {
 453         case USB_ACL_EP:
 454             usb_bt_fifo_out_enqueue(s, &s->outacl, s->hci->acl_send,
 455                             usb_bt_hci_acl_complete, p);
 456             break;
 457
 458         case USB_SCO_EP:
 459             usb_bt_fifo_out_enqueue(s, &s->outsco, s->hci->sco_send,
 460                             usb_bt_hci_sco_complete, p);
 461             break;
 462
 463         default:
 464             goto fail;
 465         }
 466         break;
 467
 468     default:
 469     fail:
 470         p->status = USB_RET_STALL;
 471         break;
 472     }
 473 }
 474
 475 static void usb_bt_out_hci_packet_event(void *opaque,
 476                 const uint8_t *data, int len)
 477 {
 478     struct USBBtState *s = (struct USBBtState *) opaque;
 479
 480     if (s->evt.len == 0) {
 481         usb_wakeup(s->intr, 0);
 482     }
 483     usb_bt_fifo_enqueue(&s->evt, data, len);
 484 }
 485
 486 static void usb_bt_out_hci_packet_acl(void *opaque,
 487                 const uint8_t *data, int len)
 488 {
 489     struct USBBtState *s = (struct USBBtState *) opaque;
 490
 491     usb_bt_fifo_enqueue(&s->acl, data, len);
 492 }
 493
 494 static void usb_bt_handle_destroy(USBDevice *dev)
 495 {
 496     struct USBBtState *s = (struct USBBtState *) dev->opaque;
 497
 498     s->hci->opaque = NULL;
 499     s->hci->evt_recv = NULL;
 500     s->hci->acl_recv = NULL;
 501 }
 502
 503 static int usb_bt_initfn(USBDevice *dev)
 504 {
 505     struct USBBtState *s = DO_UPCAST(struct USBBtState, dev, dev);
 506
 507     usb_desc_create_serial(dev);
 508     usb_desc_init(dev);
 509     s->intr = usb_ep_get(dev, USB_TOKEN_IN, USB_EVT_EP);
 510
 511     return 0;
 512 }
 513
 514 USBDevice *usb_bt_init(USBBus *bus, HCIInfo *hci)
 515 {
 516     USBDevice *dev;
 517     struct USBBtState *s;
 518
 519     if (!hci)
 520         return NULL;
 521     dev = usb_create_simple(bus, "usb-bt-dongle");
 522     if (!dev) {
 523         return NULL;
 524     }
 525     s = DO_UPCAST(struct USBBtState, dev, dev);
 526     s->dev.opaque = s;
 527
 528     s->hci = hci;
 529     s->hci->opaque = s;
 530     s->hci->evt_recv = usb_bt_out_hci_packet_event;
 531     s->hci->acl_recv = usb_bt_out_hci_packet_acl;
 532
 533     usb_bt_handle_reset(&s->dev);
 534
 535     return dev;
 536 }
 537
 538 static const VMStateDescription vmstate_usb_bt = {
 539     .name = "usb-bt",
 540     .unmigratable = 1,
 541 };
 542
 543 static void usb_bt_class_initfn(ObjectClass *klass, void *data)
 544 {
 545     DeviceClass *dc = DEVICE_CLASS(klass);
 546     USBDeviceClass *uc = USB_DEVICE_CLASS(klass);
 547
 548     uc->init           = usb_bt_initfn;
 549     uc->product_desc   = "QEMU BT dongle";
 550     uc->usb_desc       = &desc_bluetooth;
 551     uc->handle_reset   = usb_bt_handle_reset;
 552     uc->handle_control = usb_bt_handle_control;
 553     uc->handle_data    = usb_bt_handle_data;
 554     uc->handle_destroy = usb_bt_handle_destroy;
 555     dc->vmsd = &vmstate_usb_bt;
 556 }
 557
 558 static const TypeInfo bt_info = {
 559     .name          = "usb-bt-dongle",
 560     .parent        = TYPE_USB_DEVICE,
 561     .instance_size = sizeof(struct USBBtState),
 562     .class_init    = usb_bt_class_initfn,
 563 };
 564
 565 static void usb_bt_register_types(void)
 566 {
 567     type_register_static(&bt_info);
 568 }
 569
 570 type_init(usb_bt_register_types)