aboutsummaryrefslogtreecommitdiff
path: root/hw/usb-bt.c
blob: f30eec1ea2db1a164c91b11aa955a873429ac1b7 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
/*
 * QEMU Bluetooth HCI USB Transport Layer v1.0
 *
 * Copyright (C) 2007 OpenMoko, Inc.
 * Copyright (C) 2008 Andrzej Zaborowski  <balrog@zabor.org>
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as
 * published by the Free Software Foundation; either version 2 or
 * (at your option) version 3 of the License.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License along
 * with this program; if not, see <http://www.gnu.org/licenses/>.
 */

#include "qemu-common.h"
#include "usb.h"
#include "usb-desc.h"
#include "net.h"
#include "bt.h"

struct USBBtState {
    USBDevice dev;
    struct HCIInfo *hci;

    int altsetting;
    int config;

#define CFIFO_LEN_MASK	255
#define DFIFO_LEN_MASK	4095
    struct usb_hci_in_fifo_s {
        uint8_t data[(DFIFO_LEN_MASK + 1) * 2];
        struct {
            uint8_t *data;
            int len;
        } fifo[CFIFO_LEN_MASK + 1];
        int dstart, dlen, dsize, start, len;
    } evt, acl, sco;

    struct usb_hci_out_fifo_s {
        uint8_t data[4096];
	int len;
    } outcmd, outacl, outsco;
};

#define USB_EVT_EP	1
#define USB_ACL_EP	2
#define USB_SCO_EP	3

enum {
    STR_MANUFACTURER = 1,
    STR_SERIALNUMBER,
};

static const USBDescStrings desc_strings = {
    [STR_MANUFACTURER]     = "QEMU " QEMU_VERSION,
    [STR_SERIALNUMBER]     = "1",
};

static const USBDescIface desc_iface_bluetooth[] = {
    {
        .bInterfaceNumber              = 0,
        .bNumEndpoints                 = 3,
        .bInterfaceClass               = 0xe0, /* Wireless */
        .bInterfaceSubClass            = 0x01, /* Radio Frequency */
        .bInterfaceProtocol            = 0x01, /* Bluetooth */
        .eps = (USBDescEndpoint[]) {
            {
                .bEndpointAddress      = USB_DIR_IN | USB_EVT_EP,
                .bmAttributes          = USB_ENDPOINT_XFER_INT,
                .wMaxPacketSize        = 0x10,
                .bInterval             = 0x02,
            },
            {
                .bEndpointAddress      = USB_DIR_OUT | USB_ACL_EP,
                .bmAttributes          = USB_ENDPOINT_XFER_BULK,
                .wMaxPacketSize        = 0x40,
                .bInterval             = 0x0a,
            },
            {
                .bEndpointAddress      = USB_DIR_IN | USB_ACL_EP,
                .bmAttributes          = USB_ENDPOINT_XFER_BULK,
                .wMaxPacketSize        = 0x40,
                .bInterval             = 0x0a,
            },
        },
    },{
        .bInterfaceNumber              = 1,
        .bAlternateSetting             = 0,
        .bNumEndpoints                 = 2,
        .bInterfaceClass               = 0xe0, /* Wireless */
        .bInterfaceSubClass            = 0x01, /* Radio Frequency */
        .bInterfaceProtocol            = 0x01, /* Bluetooth */
        .eps = (USBDescEndpoint[]) {
            {
                .bEndpointAddress      = USB_DIR_OUT | USB_SCO_EP,
                .bmAttributes          = USB_ENDPOINT_XFER_ISOC,
                .wMaxPacketSize        = 0,
                .bInterval             = 0x01,
            },
            {
                .bEndpointAddress      = USB_DIR_IN | USB_SCO_EP,
                .bmAttributes          = USB_ENDPOINT_XFER_ISOC,
                .wMaxPacketSize        = 0,
                .bInterval             = 0x01,
            },
        },
    },{
        .bInterfaceNumber              = 1,
        .bAlternateSetting             = 1,
        .bNumEndpoints                 = 2,
        .bInterfaceClass               = 0xe0, /* Wireless */
        .bInterfaceSubClass            = 0x01, /* Radio Frequency */
        .bInterfaceProtocol            = 0x01, /* Bluetooth */
        .eps = (USBDescEndpoint[]) {
            {
                .bEndpointAddress      = USB_DIR_OUT | USB_SCO_EP,
                .bmAttributes          = USB_ENDPOINT_XFER_ISOC,
                .wMaxPacketSize        = 0x09,
                .bInterval             = 0x01,
            },
            {
                .bEndpointAddress      = USB_DIR_IN | USB_SCO_EP,
                .bmAttributes          = USB_ENDPOINT_XFER_ISOC,
                .wMaxPacketSize        = 0x09,
                .bInterval             = 0x01,
            },
        },
    },{
        .bInterfaceNumber              = 1,
        .bAlternateSetting             = 2,
        .bNumEndpoints                 = 2,
        .bInterfaceClass               = 0xe0, /* Wireless */
        .bInterfaceSubClass            = 0x01, /* Radio Frequency */
        .bInterfaceProtocol            = 0x01, /* Bluetooth */
        .eps = (USBDescEndpoint[]) {
            {
                .bEndpointAddress      = USB_DIR_OUT | USB_SCO_EP,
                .bmAttributes          = USB_ENDPOINT_XFER_ISOC,
                .wMaxPacketSize        = 0x11,
                .bInterval             = 0x01,
            },
            {
                .bEndpointAddress      = USB_DIR_IN | USB_SCO_EP,
                .bmAttributes          = USB_ENDPOINT_XFER_ISOC,
                .wMaxPacketSize        = 0x11,
                .bInterval             = 0x01,
            },
        },
    },{
        .bInterfaceNumber              = 1,
        .bAlternateSetting             = 3,
        .bNumEndpoints                 = 2,
        .bInterfaceClass               = 0xe0, /* Wireless */
        .bInterfaceSubClass            = 0x01, /* Radio Frequency */
        .bInterfaceProtocol            = 0x01, /* Bluetooth */
        .eps = (USBDescEndpoint[]) {
            {
                .bEndpointAddress      = USB_DIR_OUT | USB_SCO_EP,
                .bmAttributes          = USB_ENDPOINT_XFER_ISOC,
                .wMaxPacketSize        = 0x19,
                .bInterval             = 0x01,
            },
            {
                .bEndpointAddress      = USB_DIR_IN | USB_SCO_EP,
                .bmAttributes          = USB_ENDPOINT_XFER_ISOC,
                .wMaxPacketSize        = 0x19,
                .bInterval             = 0x01,
            },
        },
    },{
        .bInterfaceNumber              = 1,
        .bAlternateSetting             = 4,
        .bNumEndpoints                 = 2,
        .bInterfaceClass               = 0xe0, /* Wireless */
        .bInterfaceSubClass            = 0x01, /* Radio Frequency */
        .bInterfaceProtocol            = 0x01, /* Bluetooth */
        .eps = (USBDescEndpoint[]) {
            {
                .bEndpointAddress      = USB_DIR_OUT | USB_SCO_EP,
                .bmAttributes          = USB_ENDPOINT_XFER_ISOC,
                .wMaxPacketSize        = 0x21,
                .bInterval             = 0x01,
            },
            {
                .bEndpointAddress      = USB_DIR_IN | USB_SCO_EP,
                .bmAttributes          = USB_ENDPOINT_XFER_ISOC,
                .wMaxPacketSize        = 0x21,
                .bInterval             = 0x01,
            },
        },
    },{
        .bInterfaceNumber              = 1,
        .bAlternateSetting             = 5,
        .bNumEndpoints                 = 2,
        .bInterfaceClass               = 0xe0, /* Wireless */
        .bInterfaceSubClass            = 0x01, /* Radio Frequency */
        .bInterfaceProtocol            = 0x01, /* Bluetooth */
        .eps = (USBDescEndpoint[]) {
            {
                .bEndpointAddress      = USB_DIR_OUT | USB_SCO_EP,
                .bmAttributes          = USB_ENDPOINT_XFER_ISOC,
                .wMaxPacketSize        = 0x31,
                .bInterval             = 0x01,
            },
            {
                .bEndpointAddress      = USB_DIR_IN | USB_SCO_EP,
                .bmAttributes          = USB_ENDPOINT_XFER_ISOC,
                .wMaxPacketSize        = 0x31,
                .bInterval             = 0x01,
            },
        },
    }
};

static const USBDescDevice desc_device_bluetooth = {
    .bcdUSB                        = 0x0110,
    .bDeviceClass                  = 0xe0, /* Wireless */
    .bDeviceSubClass               = 0x01, /* Radio Frequency */
    .bDeviceProtocol               = 0x01, /* Bluetooth */
    .bMaxPacketSize0               = 64,
    .bNumConfigurations            = 1,
    .confs = (USBDescConfig[]) {
        {
            .bNumInterfaces        = 2,
            .bConfigurationValue   = 1,
            .bmAttributes          = 0xc0,
            .bMaxPower             = 0,
            .nif = ARRAY_SIZE(desc_iface_bluetooth),
            .ifs = desc_iface_bluetooth,
        },
    },
};

static const USBDesc desc_bluetooth = {
    .id = {
        .idVendor          = 0x0a12,
        .idProduct         = 0x0001,
        .bcdDevice         = 0x1958,
        .iManufacturer     = STR_MANUFACTURER,
        .iProduct          = 0,
        .iSerialNumber     = STR_SERIALNUMBER,
    },
    .full = &desc_device_bluetooth,
    .str  = desc_strings,
};

static void usb_bt_fifo_reset(struct usb_hci_in_fifo_s *fifo)
{
    fifo->dstart = 0;
    fifo->dlen = 0;
    fifo->dsize = DFIFO_LEN_MASK + 1;
    fifo->start = 0;
    fifo->len = 0;
}

static void usb_bt_fifo_enqueue(struct usb_hci_in_fifo_s *fifo,
                const uint8_t *data, int len)
{
    int off = fifo->dstart + fifo->dlen;
    uint8_t *buf;

    fifo->dlen += len;
    if (off <= DFIFO_LEN_MASK) {
        if (off + len > DFIFO_LEN_MASK + 1 &&
                        (fifo->dsize = off + len) > (DFIFO_LEN_MASK + 1) * 2) {
            fprintf(stderr, "%s: can't alloc %i bytes\n", __FUNCTION__, len);
            exit(-1);
        }
        buf = fifo->data + off;
    } else {
        if (fifo->dlen > fifo->dsize) {
            fprintf(stderr, "%s: can't alloc %i bytes\n", __FUNCTION__, len);
            exit(-1);
        }
        buf = fifo->data + off - fifo->dsize;
    }

    off = (fifo->start + fifo->len ++) & CFIFO_LEN_MASK;
    fifo->fifo[off].data = memcpy(buf, data, len);
    fifo->fifo[off].len = len;
}

static inline int usb_bt_fifo_dequeue(struct usb_hci_in_fifo_s *fifo,
                USBPacket *p)
{
    int len;

    if (likely(!fifo->len))
        return USB_RET_STALL;

    len = MIN(p->iov.size, fifo->fifo[fifo->start].len);
    usb_packet_copy(p, fifo->fifo[fifo->start].data, len);
    if (len == p->iov.size) {
        fifo->fifo[fifo->start].len -= len;
        fifo->fifo[fifo->start].data += len;
    } else {
        fifo->start ++;
        fifo->start &= CFIFO_LEN_MASK;
        fifo->len --;
    }

    fifo->dstart += len;
    fifo->dlen -= len;
    if (fifo->dstart >= fifo->dsize) {
        fifo->dstart = 0;
        fifo->dsize = DFIFO_LEN_MASK + 1;
    }

    return len;
}

static inline void usb_bt_fifo_out_enqueue(struct USBBtState *s,
                struct usb_hci_out_fifo_s *fifo,
                void (*send)(struct HCIInfo *, const uint8_t *, int),
                int (*complete)(const uint8_t *, int),
                USBPacket *p)
{
    usb_packet_copy(p, fifo->data + fifo->len, p->iov.size);
    fifo->len += p->iov.size;
    if (complete(fifo->data, fifo->len)) {
        send(s->hci, fifo->data, fifo->len);
        fifo->len = 0;
    }

    /* TODO: do we need to loop? */
}

static int usb_bt_hci_cmd_complete(const uint8_t *data, int len)
{
    len -= HCI_COMMAND_HDR_SIZE;
    return len >= 0 &&
            len >= ((struct hci_command_hdr *) data)->plen;
}

static int usb_bt_hci_acl_complete(const uint8_t *data, int len)
{
    len -= HCI_ACL_HDR_SIZE;
    return len >= 0 &&
            len >= le16_to_cpu(((struct hci_acl_hdr *) data)->dlen);
}

static int usb_bt_hci_sco_complete(const uint8_t *data, int len)
{
    len -= HCI_SCO_HDR_SIZE;
    return len >= 0 &&
            len >= ((struct hci_sco_hdr *) data)->dlen;
}

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

    usb_bt_fifo_reset(&s->evt);
    usb_bt_fifo_reset(&s->acl);
    usb_bt_fifo_reset(&s->sco);
    s->outcmd.len = 0;
    s->outacl.len = 0;
    s->outsco.len = 0;
    s->altsetting = 0;
}

static int usb_bt_handle_control(USBDevice *dev, USBPacket *p,
               int request, int value, int index, int length, uint8_t *data)
{
    struct USBBtState *s = (struct USBBtState *) dev->opaque;
    int ret;

    ret = usb_desc_handle_control(dev, p, request, value, index, length, data);
    if (ret >= 0) {
        switch (request) {
        case DeviceRequest | USB_REQ_GET_CONFIGURATION:
            s->config = 0;
            break;
        case DeviceOutRequest | USB_REQ_SET_CONFIGURATION:
            s->config = 1;
            usb_bt_fifo_reset(&s->evt);
            usb_bt_fifo_reset(&s->acl);
            usb_bt_fifo_reset(&s->sco);
            break;
        }
        return ret;
    }

    ret = 0;
    switch (request) {
    case InterfaceRequest | USB_REQ_GET_STATUS:
    case EndpointRequest | USB_REQ_GET_STATUS:
        data[0] = 0x00;
        data[1] = 0x00;
        ret = 2;
        break;
    case InterfaceOutRequest | USB_REQ_CLEAR_FEATURE:
    case EndpointOutRequest | USB_REQ_CLEAR_FEATURE:
        goto fail;
    case InterfaceOutRequest | USB_REQ_SET_FEATURE:
    case EndpointOutRequest | USB_REQ_SET_FEATURE:
        goto fail;
        break;
    case InterfaceRequest | USB_REQ_GET_INTERFACE:
        if (value != 0 || (index & ~1) || length != 1)
            goto fail;
        if (index == 1)
            data[0] = s->altsetting;
        else
            data[0] = 0;
        ret = 1;
        break;
    case InterfaceOutRequest | USB_REQ_SET_INTERFACE:
        if ((index & ~1) || length != 0 ||
                        (index == 1 && (value < 0 || value > 4)) ||
                        (index == 0 && value != 0)) {
            printf("%s: Wrong SET_INTERFACE request (%i, %i)\n",
                            __FUNCTION__, index, value);
            goto fail;
        }
        s->altsetting = value;
        ret = 0;
        break;
    case ((USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_DEVICE) << 8):
        if (s->config)
            usb_bt_fifo_out_enqueue(s, &s->outcmd, s->hci->cmd_send,
                            usb_bt_hci_cmd_complete, p);
        break;
    default:
    fail:
        ret = USB_RET_STALL;
        break;
    }
    return ret;
}

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

    if (!s->config)
        goto fail;

    switch (p->pid) {
    case USB_TOKEN_IN:
        switch (p->devep & 0xf) {
        case USB_EVT_EP:
            ret = usb_bt_fifo_dequeue(&s->evt, p);
            break;

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

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

        default:
            goto fail;
        }
        break;

    case USB_TOKEN_OUT:
        switch (p->devep & 0xf) {
        case USB_ACL_EP:
            usb_bt_fifo_out_enqueue(s, &s->outacl, s->hci->acl_send,
                            usb_bt_hci_acl_complete, p);
            break;

        case USB_SCO_EP:
            usb_bt_fifo_out_enqueue(s, &s->outsco, s->hci->sco_send,
                            usb_bt_hci_sco_complete, p);
            break;

        default:
            goto fail;
        }
        break;

    default:
    fail:
        ret = USB_RET_STALL;
        break;
    }

    return ret;
}

static void usb_bt_out_hci_packet_event(void *opaque,
                const uint8_t *data, int len)
{
    struct USBBtState *s = (struct USBBtState *) opaque;

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

static void usb_bt_out_hci_packet_acl(void *opaque,
                const uint8_t *data, int len)
{
    struct USBBtState *s = (struct USBBtState *) opaque;

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

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

    s->hci->opaque = NULL;
    s->hci->evt_recv = NULL;
    s->hci->acl_recv = NULL;
}

static int usb_bt_initfn(USBDevice *dev)
{
    usb_desc_init(dev);
    return 0;
}

USBDevice *usb_bt_init(HCIInfo *hci)
{
    USBDevice *dev;
    struct USBBtState *s;

    if (!hci)
        return NULL;
    dev = usb_create_simple(NULL /* FIXME */, "usb-bt-dongle");
    if (!dev) {
        return NULL;
    }
    s = DO_UPCAST(struct USBBtState, dev, dev);
    s->dev.opaque = s;

    s->hci = hci;
    s->hci->opaque = s;
    s->hci->evt_recv = usb_bt_out_hci_packet_event;
    s->hci->acl_recv = usb_bt_out_hci_packet_acl;

    usb_bt_handle_reset(&s->dev);

    return dev;
}

static const VMStateDescription vmstate_usb_bt = {
    .name = "usb-bt",
    .unmigratable = 1,
};

static struct USBDeviceInfo bt_info = {
    .product_desc   = "QEMU BT dongle",
    .qdev.name      = "usb-bt-dongle",
    .qdev.size      = sizeof(struct USBBtState),
    .qdev.vmsd      = &vmstate_usb_bt,
    .usb_desc       = &desc_bluetooth,
    .init           = usb_bt_initfn,
    .handle_packet  = usb_generic_handle_packet,
    .handle_reset   = usb_bt_handle_reset,
    .handle_control = usb_bt_handle_control,
    .handle_data    = usb_bt_handle_data,
    .handle_destroy = usb_bt_handle_destroy,
};

static void usb_bt_register_devices(void)
{
    usb_qdev_register(&bt_info);
}
device_init(usb_bt_register_devices)