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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.
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 *
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 * 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);
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 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)