hw/usb-bt.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 "usb.h"
  23 #include "usb-desc.h"
  24 #include "net.h"
  25 #include "bt.h"
  26
  27 struct USBBtState {
  28     USBDevice dev;
  29     struct HCIInfo *hci;
  30
  31     int altsetting;
  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 " QEMU_VERSION,
  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 int usb_bt_fifo_dequeue(struct usb_hci_in_fifo_s *fifo,
 290                 USBPacket *p)
 291 {
 292     int len;
 293
 294     if (likely(!fifo->len))
 295         return USB_RET_STALL;
 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     return len;
 316 }
 317
 318 static inline void usb_bt_fifo_out_enqueue(struct USBBtState *s,
 319                 struct usb_hci_out_fifo_s *fifo,
 320                 void (*send)(struct HCIInfo *, const uint8_t *, int),
 321                 int (*complete)(const uint8_t *, int),
 322                 USBPacket *p)
 323 {
 324     usb_packet_copy(p, fifo->data + fifo->len, p->iov.size);
 325     fifo->len += p->iov.size;
 326     if (complete(fifo->data, fifo->len)) {
 327         send(s->hci, fifo->data, fifo->len);
 328         fifo->len = 0;
 329     }
 330
 331     /* TODO: do we need to loop? */
 332 }
 333
 334 static int usb_bt_hci_cmd_complete(const uint8_t *data, int len)
 335 {
 336     len -= HCI_COMMAND_HDR_SIZE;
 337     return len >= 0 &&
 338             len >= ((struct hci_command_hdr *) data)->plen;
 339 }
 340
 341 static int usb_bt_hci_acl_complete(const uint8_t *data, int len)
 342 {
 343     len -= HCI_ACL_HDR_SIZE;
 344     return len >= 0 &&
 345             len >= le16_to_cpu(((struct hci_acl_hdr *) data)->dlen);
 346 }
 347
 348 static int usb_bt_hci_sco_complete(const uint8_t *data, int len)
 349 {
 350     len -= HCI_SCO_HDR_SIZE;
 351     return len >= 0 &&
 352             len >= ((struct hci_sco_hdr *) data)->dlen;
 353 }
 354
 355 static void usb_bt_handle_reset(USBDevice *dev)
 356 {
 357     struct USBBtState *s = (struct USBBtState *) dev->opaque;
 358
 359     usb_bt_fifo_reset(&s->evt);
 360     usb_bt_fifo_reset(&s->acl);
 361     usb_bt_fifo_reset(&s->sco);
 362     s->outcmd.len = 0;
 363     s->outacl.len = 0;
 364     s->outsco.len = 0;
 365     s->altsetting = 0;
 366 }
 367
 368 static int usb_bt_handle_control(USBDevice *dev, USBPacket *p,
 369                int request, int value, int index, int length, uint8_t *data)
 370 {
 371     struct USBBtState *s = (struct USBBtState *) dev->opaque;
 372     int ret;
 373
 374     ret = usb_desc_handle_control(dev, p, request, value, index, length, data);
 375     if (ret >= 0) {
 376         switch (request) {
 377         case DeviceRequest | USB_REQ_GET_CONFIGURATION:
 378             s->config = 0;
 379             break;
 380         case DeviceOutRequest | USB_REQ_SET_CONFIGURATION:
 381             s->config = 1;
 382             usb_bt_fifo_reset(&s->evt);
 383             usb_bt_fifo_reset(&s->acl);
 384             usb_bt_fifo_reset(&s->sco);
 385             break;
 386         }
 387         return ret;
 388     }
 389
 390     ret = 0;
 391     switch (request) {
 392     case InterfaceRequest | USB_REQ_GET_STATUS:
 393     case EndpointRequest | USB_REQ_GET_STATUS:
 394         data[0] = 0x00;
 395         data[1] = 0x00;
 396         ret = 2;
 397         break;
 398     case InterfaceOutRequest | USB_REQ_CLEAR_FEATURE:
 399     case EndpointOutRequest | USB_REQ_CLEAR_FEATURE:
 400         goto fail;
 401     case InterfaceOutRequest | USB_REQ_SET_FEATURE:
 402     case EndpointOutRequest | USB_REQ_SET_FEATURE:
 403         goto fail;
 404         break;
 405     case InterfaceRequest | USB_REQ_GET_INTERFACE:
 406         if (value != 0 || (index & ~1) || length != 1)
 407             goto fail;
 408         if (index == 1)
 409             data[0] = s->altsetting;
 410         else
 411             data[0] = 0;
 412         ret = 1;
 413         break;
 414     case InterfaceOutRequest | USB_REQ_SET_INTERFACE:
 415         if ((index & ~1) || length != 0 ||
 416                         (index == 1 && (value < 0 || value > 4)) ||
 417                         (index == 0 && value != 0)) {
 418             printf("%s: Wrong SET_INTERFACE request (%i, %i)\n",
 419                             __FUNCTION__, index, value);
 420             goto fail;
 421         }
 422         s->altsetting = value;
 423         ret = 0;
 424         break;
 425     case ((USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_DEVICE) << 8):
 426         if (s->config)
 427             usb_bt_fifo_out_enqueue(s, &s->outcmd, s->hci->cmd_send,
 428                             usb_bt_hci_cmd_complete, p);
 429         break;
 430     default:
 431     fail:
 432         ret = USB_RET_STALL;
 433         break;
 434     }
 435     return ret;
 436 }
 437
 438 static int usb_bt_handle_data(USBDevice *dev, USBPacket *p)
 439 {
 440     struct USBBtState *s = (struct USBBtState *) dev->opaque;
 441     int ret = 0;
 442
 443     if (!s->config)
 444         goto fail;
 445
 446     switch (p->pid) {
 447     case USB_TOKEN_IN:
 448         switch (p->devep & 0xf) {
 449         case USB_EVT_EP:
 450             ret = usb_bt_fifo_dequeue(&s->evt, p);
 451             break;
 452
 453         case USB_ACL_EP:
 454             ret = usb_bt_fifo_dequeue(&s->acl, p);
 455             break;
 456
 457         case USB_SCO_EP:
 458             ret = usb_bt_fifo_dequeue(&s->sco, p);
 459             break;
 460
 461         default:
 462             goto fail;
 463         }
 464         break;
 465
 466     case USB_TOKEN_OUT:
 467         switch (p->devep & 0xf) {
 468         case USB_ACL_EP:
 469             usb_bt_fifo_out_enqueue(s, &s->outacl, s->hci->acl_send,
 470                             usb_bt_hci_acl_complete, p);
 471             break;
 472
 473         case USB_SCO_EP:
 474             usb_bt_fifo_out_enqueue(s, &s->outsco, s->hci->sco_send,
 475                             usb_bt_hci_sco_complete, p);
 476             break;
 477
 478         default:
 479             goto fail;
 480         }
 481         break;
 482
 483     default:
 484     fail:
 485         ret = USB_RET_STALL;
 486         break;
 487     }
 488
 489     return ret;
 490 }
 491
 492 static void usb_bt_out_hci_packet_event(void *opaque,
 493                 const uint8_t *data, int len)
 494 {
 495     struct USBBtState *s = (struct USBBtState *) opaque;
 496
 497     usb_bt_fifo_enqueue(&s->evt, data, len);
 498 }
 499
 500 static void usb_bt_out_hci_packet_acl(void *opaque,
 501                 const uint8_t *data, int len)
 502 {
 503     struct USBBtState *s = (struct USBBtState *) opaque;
 504
 505     usb_bt_fifo_enqueue(&s->acl, data, len);
 506 }
 507
 508 static void usb_bt_handle_destroy(USBDevice *dev)
 509 {
 510     struct USBBtState *s = (struct USBBtState *) dev->opaque;
 511
 512     s->hci->opaque = NULL;
 513     s->hci->evt_recv = NULL;
 514     s->hci->acl_recv = NULL;
 515 }
 516
 517 static int usb_bt_initfn(USBDevice *dev)
 518 {
 519     usb_desc_init(dev);
 520     return 0;
 521 }
 522
 523 USBDevice *usb_bt_init(HCIInfo *hci)
 524 {
 525     USBDevice *dev;
 526     struct USBBtState *s;
 527
 528     if (!hci)
 529         return NULL;
 530     dev = usb_create_simple(NULL /* FIXME */, "usb-bt-dongle");
 531     if (!dev) {
 532         return NULL;
 533     }
 534     s = DO_UPCAST(struct USBBtState, dev, dev);
 535     s->dev.opaque = s;
 536
 537     s->hci = hci;
 538     s->hci->opaque = s;
 539     s->hci->evt_recv = usb_bt_out_hci_packet_event;
 540     s->hci->acl_recv = usb_bt_out_hci_packet_acl;
 541
 542     usb_bt_handle_reset(&s->dev);
 543
 544     return dev;
 545 }
 546
 547 static const VMStateDescription vmstate_usb_bt = {
 548     .name = "usb-bt",
 549     .unmigratable = 1,
 550 };
 551
 552 static struct USBDeviceInfo bt_info = {
 553     .product_desc   = "QEMU BT dongle",
 554     .qdev.name      = "usb-bt-dongle",
 555     .qdev.size      = sizeof(struct USBBtState),
 556     .qdev.vmsd      = &vmstate_usb_bt,
 557     .usb_desc       = &desc_bluetooth,
 558     .init           = usb_bt_initfn,
 559     .handle_packet  = usb_generic_handle_packet,
 560     .handle_reset   = usb_bt_handle_reset,
 561     .handle_control = usb_bt_handle_control,
 562     .handle_data    = usb_bt_handle_data,
 563     .handle_destroy = usb_bt_handle_destroy,
 564 };
 565
 566 static void usb_bt_register_devices(void)
 567 {
 568     usb_qdev_register(&bt_info);
 569 }
 570 device_init(usb_bt_register_devices)