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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_INT,
103
                .wMaxPacketSize        = 0,
104
                .bInterval             = 0x01,
105
            },
106
            {
107
                .bEndpointAddress      = USB_DIR_IN | USB_SCO_EP,
108
                .bmAttributes          = USB_ENDPOINT_XFER_INT,
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_INT,
124
                .wMaxPacketSize        = 0x09,
125
                .bInterval             = 0x01,
126
            },
127
            {
128
                .bEndpointAddress      = USB_DIR_IN | USB_SCO_EP,
129
                .bmAttributes          = USB_ENDPOINT_XFER_INT,
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_INT,
145
                .wMaxPacketSize        = 0x11,
146
                .bInterval             = 0x01,
147
            },
148
            {
149
                .bEndpointAddress      = USB_DIR_IN | USB_SCO_EP,
150
                .bmAttributes          = USB_ENDPOINT_XFER_INT,
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_INT,
166
                .wMaxPacketSize        = 0x19,
167
                .bInterval             = 0x01,
168
            },
169
            {
170
                .bEndpointAddress      = USB_DIR_IN | USB_SCO_EP,
171
                .bmAttributes          = USB_ENDPOINT_XFER_INT,
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_INT,
187
                .wMaxPacketSize        = 0x21,
188
                .bInterval             = 0x01,
189
            },
190
            {
191
                .bEndpointAddress      = USB_DIR_IN | USB_SCO_EP,
192
                .bmAttributes          = USB_ENDPOINT_XFER_INT,
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_INT,
208
                .wMaxPacketSize        = 0x31,
209
                .bInterval             = 0x01,
210
            },
211
            {
212
                .bEndpointAddress      = USB_DIR_IN | USB_SCO_EP,
213
                .bmAttributes          = USB_ENDPOINT_XFER_INT,
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->len, fifo->fifo[fifo->start].len);
298
    memcpy(p->data, fifo->fifo[fifo->start].data, len);
299
    if (len == p->len) {
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
                const uint8_t *data, int len)
323
{
324
    if (fifo->len) {
325
        memcpy(fifo->data + fifo->len, data, len);
326
        fifo->len += len;
327
        if (complete(fifo->data, fifo->len)) {
328
            send(s->hci, fifo->data, fifo->len);
329
            fifo->len = 0;
330
        }
331
    } else if (complete(data, len))
332
        send(s->hci, data, len);
333
    else {
334
        memcpy(fifo->data, data, len);
335
        fifo->len = len;
336
    }
337

    
338
    /* TODO: do we need to loop? */
339
}
340

    
341
static int usb_bt_hci_cmd_complete(const uint8_t *data, int len)
342
{
343
    len -= HCI_COMMAND_HDR_SIZE;
344
    return len >= 0 &&
345
            len >= ((struct hci_command_hdr *) data)->plen;
346
}
347

    
348
static int usb_bt_hci_acl_complete(const uint8_t *data, int len)
349
{
350
    len -= HCI_ACL_HDR_SIZE;
351
    return len >= 0 &&
352
            len >= le16_to_cpu(((struct hci_acl_hdr *) data)->dlen);
353
}
354

    
355
static int usb_bt_hci_sco_complete(const uint8_t *data, int len)
356
{
357
    len -= HCI_SCO_HDR_SIZE;
358
    return len >= 0 &&
359
            len >= ((struct hci_sco_hdr *) data)->dlen;
360
}
361

    
362
static void usb_bt_handle_reset(USBDevice *dev)
363
{
364
    struct USBBtState *s = (struct USBBtState *) dev->opaque;
365

    
366
    usb_bt_fifo_reset(&s->evt);
367
    usb_bt_fifo_reset(&s->acl);
368
    usb_bt_fifo_reset(&s->sco);
369
    s->outcmd.len = 0;
370
    s->outacl.len = 0;
371
    s->outsco.len = 0;
372
    s->altsetting = 0;
373
}
374

    
375
static int usb_bt_handle_control(USBDevice *dev, int request, int value,
376
                int index, int length, uint8_t *data)
377
{
378
    struct USBBtState *s = (struct USBBtState *) dev->opaque;
379
    int ret;
380

    
381
    ret = usb_desc_handle_control(dev, request, value, index, length, data);
382
    if (ret >= 0) {
383
        return ret;
384
    }
385

    
386
    ret = 0;
387
    switch (request) {
388
    case DeviceRequest | USB_REQ_GET_STATUS:
389
    case InterfaceRequest | USB_REQ_GET_STATUS:
390
    case EndpointRequest | USB_REQ_GET_STATUS:
391
        data[0] = (1 << USB_DEVICE_SELF_POWERED) |
392
            (dev->remote_wakeup << USB_DEVICE_REMOTE_WAKEUP);
393
        data[1] = 0x00;
394
        ret = 2;
395
        break;
396
    case DeviceOutRequest | USB_REQ_CLEAR_FEATURE:
397
    case InterfaceOutRequest | USB_REQ_CLEAR_FEATURE:
398
    case EndpointOutRequest | USB_REQ_CLEAR_FEATURE:
399
        if (value == USB_DEVICE_REMOTE_WAKEUP) {
400
            dev->remote_wakeup = 0;
401
        } else {
402
            goto fail;
403
        }
404
        ret = 0;
405
        break;
406
    case DeviceOutRequest | USB_REQ_SET_FEATURE:
407
    case InterfaceOutRequest | USB_REQ_SET_FEATURE:
408
    case EndpointOutRequest | USB_REQ_SET_FEATURE:
409
        if (value == USB_DEVICE_REMOTE_WAKEUP) {
410
            dev->remote_wakeup = 1;
411
        } else {
412
            goto fail;
413
        }
414
        ret = 0;
415
        break;
416
    case DeviceOutRequest | USB_REQ_SET_ADDRESS:
417
        dev->addr = value;
418
        ret = 0;
419
        break;
420
    case DeviceRequest | USB_REQ_GET_CONFIGURATION:
421
        data[0] = 1;
422
        ret = 1;
423
        s->config = 0;
424
        break;
425
    case DeviceOutRequest | USB_REQ_SET_CONFIGURATION:
426
        ret = 0;
427
        if (value != 1 && value != 0) {
428
            printf("%s: Wrong SET_CONFIGURATION request (%i)\n",
429
                            __FUNCTION__, value);
430
            goto fail;
431
        }
432
        s->config = 1;
433
        usb_bt_fifo_reset(&s->evt);
434
        usb_bt_fifo_reset(&s->acl);
435
        usb_bt_fifo_reset(&s->sco);
436
        break;
437
    case InterfaceRequest | USB_REQ_GET_INTERFACE:
438
        if (value != 0 || (index & ~1) || length != 1)
439
            goto fail;
440
        if (index == 1)
441
            data[0] = s->altsetting;
442
        else
443
            data[0] = 0;
444
        ret = 1;
445
        break;
446
    case InterfaceOutRequest | USB_REQ_SET_INTERFACE:
447
        if ((index & ~1) || length != 0 ||
448
                        (index == 1 && (value < 0 || value > 4)) ||
449
                        (index == 0 && value != 0)) {
450
            printf("%s: Wrong SET_INTERFACE request (%i, %i)\n",
451
                            __FUNCTION__, index, value);
452
            goto fail;
453
        }
454
        s->altsetting = value;
455
        ret = 0;
456
        break;
457
    case ((USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_DEVICE) << 8):
458
        if (s->config)
459
            usb_bt_fifo_out_enqueue(s, &s->outcmd, s->hci->cmd_send,
460
                            usb_bt_hci_cmd_complete, data, length);
461
        break;
462
    default:
463
    fail:
464
        ret = USB_RET_STALL;
465
        break;
466
    }
467
    return ret;
468
}
469

    
470
static int usb_bt_handle_data(USBDevice *dev, USBPacket *p)
471
{
472
    struct USBBtState *s = (struct USBBtState *) dev->opaque;
473
    int ret = 0;
474

    
475
    if (!s->config)
476
        goto fail;
477

    
478
    switch (p->pid) {
479
    case USB_TOKEN_IN:
480
        switch (p->devep & 0xf) {
481
        case USB_EVT_EP:
482
            ret = usb_bt_fifo_dequeue(&s->evt, p);
483
            break;
484

    
485
        case USB_ACL_EP:
486
            ret = usb_bt_fifo_dequeue(&s->acl, p);
487
            break;
488

    
489
        case USB_SCO_EP:
490
            ret = usb_bt_fifo_dequeue(&s->sco, p);
491
            break;
492

    
493
        default:
494
            goto fail;
495
        }
496
        break;
497

    
498
    case USB_TOKEN_OUT:
499
        switch (p->devep & 0xf) {
500
        case USB_ACL_EP:
501
            usb_bt_fifo_out_enqueue(s, &s->outacl, s->hci->acl_send,
502
                            usb_bt_hci_acl_complete, p->data, p->len);
503
            break;
504

    
505
        case USB_SCO_EP:
506
            usb_bt_fifo_out_enqueue(s, &s->outsco, s->hci->sco_send,
507
                            usb_bt_hci_sco_complete, p->data, p->len);
508
            break;
509

    
510
        default:
511
            goto fail;
512
        }
513
        break;
514

    
515
    default:
516
    fail:
517
        ret = USB_RET_STALL;
518
        break;
519
    }
520

    
521
    return ret;
522
}
523

    
524
static void usb_bt_out_hci_packet_event(void *opaque,
525
                const uint8_t *data, int len)
526
{
527
    struct USBBtState *s = (struct USBBtState *) opaque;
528

    
529
    usb_bt_fifo_enqueue(&s->evt, data, len);
530
}
531

    
532
static void usb_bt_out_hci_packet_acl(void *opaque,
533
                const uint8_t *data, int len)
534
{
535
    struct USBBtState *s = (struct USBBtState *) opaque;
536

    
537
    usb_bt_fifo_enqueue(&s->acl, data, len);
538
}
539

    
540
static void usb_bt_handle_destroy(USBDevice *dev)
541
{
542
    struct USBBtState *s = (struct USBBtState *) dev->opaque;
543

    
544
    s->hci->opaque = NULL;
545
    s->hci->evt_recv = NULL;
546
    s->hci->acl_recv = NULL;
547
}
548

    
549
static int usb_bt_initfn(USBDevice *dev)
550
{
551
    struct USBBtState *s = DO_UPCAST(struct USBBtState, dev, dev);
552
    s->dev.speed = USB_SPEED_HIGH;
553
    return 0;
554
}
555

    
556
USBDevice *usb_bt_init(HCIInfo *hci)
557
{
558
    USBDevice *dev;
559
    struct USBBtState *s;
560

    
561
    if (!hci)
562
        return NULL;
563
    dev = usb_create_simple(NULL /* FIXME */, "usb-bt-dongle");
564
    s = DO_UPCAST(struct USBBtState, dev, dev);
565
    s->dev.opaque = s;
566

    
567
    s->hci = hci;
568
    s->hci->opaque = s;
569
    s->hci->evt_recv = usb_bt_out_hci_packet_event;
570
    s->hci->acl_recv = usb_bt_out_hci_packet_acl;
571

    
572
    usb_bt_handle_reset(&s->dev);
573

    
574
    return dev;
575
}
576

    
577
static struct USBDeviceInfo bt_info = {
578
    .product_desc   = "QEMU BT dongle",
579
    .qdev.name      = "usb-bt-dongle",
580
    .qdev.size      = sizeof(struct USBBtState),
581
    .usb_desc       = &desc_bluetooth,
582
    .init           = usb_bt_initfn,
583
    .handle_packet  = usb_generic_handle_packet,
584
    .handle_reset   = usb_bt_handle_reset,
585
    .handle_control = usb_bt_handle_control,
586
    .handle_data    = usb_bt_handle_data,
587
    .handle_destroy = usb_bt_handle_destroy,
588
};
589

    
590
static void usb_bt_register_devices(void)
591
{
592
    usb_qdev_register(&bt_info);
593
}
594
device_init(usb_bt_register_devices)