qemu

1
/*
2
 * FTDI FT232BM Device emulation
3
 *
4
 * Copyright (c) 2006 CodeSourcery.
5
 * Copyright (c) 2008 Samuel Thibault <samuel.thibault@ens-lyon.org>
6
 * Written by Paul Brook, reused for FTDI by Samuel Thibault
7
 *
8
 * This code is licensed under the LGPL.
9
 */
10

11
#include "qemu/osdep.h"
12
#include "qapi/error.h"
13
#include "qemu/cutils.h"
14
#include "qemu/error-report.h"
15
#include "qemu/module.h"
16
#include "hw/qdev-properties.h"
17
#include "hw/qdev-properties-system.h"
18
#include "hw/usb.h"
19
#include "migration/vmstate.h"
20
#include "desc.h"
21
#include "chardev/char-serial.h"
22
#include "chardev/char-fe.h"
23
#include "qom/object.h"
24
#include "trace.h"
25

26

27
#define RECV_BUF (512 - (2 * 8))
28

29
/* Commands */
30
#define FTDI_RESET             0
31
#define FTDI_SET_MDM_CTRL      1
32
#define FTDI_SET_FLOW_CTRL     2
33
#define FTDI_SET_BAUD          3
34
#define FTDI_SET_DATA          4
35
#define FTDI_GET_MDM_ST        5
36
#define FTDI_SET_EVENT_CHR     6
37
#define FTDI_SET_ERROR_CHR     7
38
#define FTDI_SET_LATENCY       9
39
#define FTDI_GET_LATENCY       10
40

41
/* RESET */
42

43
#define FTDI_RESET_SIO 0
44
#define FTDI_RESET_RX  1
45
#define FTDI_RESET_TX  2
46

47
/* SET_MDM_CTRL */
48

49
#define FTDI_DTR       1
50
#define FTDI_SET_DTR   (FTDI_DTR << 8)
51
#define FTDI_RTS       2
52
#define FTDI_SET_RTS   (FTDI_RTS << 8)
53

54
/* SET_FLOW_CTRL */
55

56
#define FTDI_NO_HS         0
57
#define FTDI_RTS_CTS_HS    1
58
#define FTDI_DTR_DSR_HS    2
59
#define FTDI_XON_XOFF_HS   4
60

61
/* SET_DATA */
62

63
#define FTDI_PARITY    (0x7 << 8)
64
#define FTDI_ODD       (0x1 << 8)
65
#define FTDI_EVEN      (0x2 << 8)
66
#define FTDI_MARK      (0x3 << 8)
67
#define FTDI_SPACE     (0x4 << 8)
68

69
#define FTDI_STOP      (0x3 << 11)
70
#define FTDI_STOP1     (0x0 << 11)
71
#define FTDI_STOP15    (0x1 << 11)
72
#define FTDI_STOP2     (0x2 << 11)
73

74
/* GET_MDM_ST */
75
/* TODO: should be sent every 40ms */
76
#define FTDI_CTS   (1 << 4)    /* CTS line status */
77
#define FTDI_DSR   (1 << 5)    /* DSR line status */
78
#define FTDI_RI    (1 << 6)    /* RI line status */
79
#define FTDI_RLSD  (1 << 7)    /* Receive Line Signal Detect */
80

81
/* Status */
82

83
#define FTDI_DR    (1 << 0)    /* Data Ready */
84
#define FTDI_OE    (1 << 1)    /* Overrun Err */
85
#define FTDI_PE    (1 << 2)    /* Parity Err */
86
#define FTDI_FE    (1 << 3)    /* Framing Err */
87
#define FTDI_BI    (1 << 4)    /* Break Interrupt */
88
#define FTDI_THRE  (1 << 5)    /* Transmitter Holding Register */
89
#define FTDI_TEMT  (1 << 6)    /* Transmitter Empty */
90
#define FTDI_FIFO  (1 << 7)    /* Error in FIFO */
91

92
struct USBSerialState {
93
    USBDevice dev;
94

95
    USBEndpoint *intr;
96
    uint8_t recv_buf[RECV_BUF];
97
    uint16_t recv_ptr;
98
    uint16_t recv_used;
99
    uint8_t event_chr;
100
    uint8_t error_chr;
101
    uint8_t event_trigger;
102
    bool always_plugged;
103
    uint8_t flow_control;
104
    uint8_t xon;
105
    uint8_t xoff;
106
    QEMUSerialSetParams params;
107
    int latency;        /* ms */
108
    CharBackend cs;
109
};
110

111
#define TYPE_USB_SERIAL "usb-serial-dev"
112
OBJECT_DECLARE_SIMPLE_TYPE(USBSerialState, USB_SERIAL)
113

114
enum {
115
    STR_MANUFACTURER = 1,
116
    STR_PRODUCT_SERIAL,
117
    STR_PRODUCT_BRAILLE,
118
    STR_SERIALNUMBER,
119
};
120

121
static const USBDescStrings desc_strings = {
122
    [STR_MANUFACTURER]    = "QEMU",
123
    [STR_PRODUCT_SERIAL]  = "QEMU USB SERIAL",
124
    [STR_PRODUCT_BRAILLE] = "QEMU USB BAUM BRAILLE",
125
    [STR_SERIALNUMBER]    = "1",
126
};
127

128
static const USBDescIface desc_iface0 = {
129
    .bInterfaceNumber              = 0,
130
    .bNumEndpoints                 = 2,
131
    .bInterfaceClass               = 0xff,
132
    .bInterfaceSubClass            = 0xff,
133
    .bInterfaceProtocol            = 0xff,
134
    .eps = (USBDescEndpoint[]) {
135
        {
136
            .bEndpointAddress      = USB_DIR_IN | 0x01,
137
            .bmAttributes          = USB_ENDPOINT_XFER_BULK,
138
            .wMaxPacketSize        = 64,
139
        },{
140
            .bEndpointAddress      = USB_DIR_OUT | 0x02,
141
            .bmAttributes          = USB_ENDPOINT_XFER_BULK,
142
            .wMaxPacketSize        = 64,
143
        },
144
    }
145
};
146

147
static const USBDescDevice desc_device = {
148
    .bcdUSB                        = 0x0200,
149
    .bMaxPacketSize0               = 8,
150
    .bNumConfigurations            = 1,
151
    .confs = (USBDescConfig[]) {
152
        {
153
            .bNumInterfaces        = 1,
154
            .bConfigurationValue   = 1,
155
            .bmAttributes          = USB_CFG_ATT_ONE | USB_CFG_ATT_WAKEUP,
156
            .bMaxPower             = 50,
157
            .nif = 1,
158
            .ifs = &desc_iface0,
159
        },
160
    },
161
};
162

163
static const USBDesc desc_serial = {
164
    .id = {
165
        .idVendor          = 0x0403,
166
        .idProduct         = 0x6001,
167
        .bcdDevice         = 0x0400,
168
        .iManufacturer     = STR_MANUFACTURER,
169
        .iProduct          = STR_PRODUCT_SERIAL,
170
        .iSerialNumber     = STR_SERIALNUMBER,
171
    },
172
    .full = &desc_device,
173
    .str  = desc_strings,
174
};
175

176
static const USBDesc desc_braille = {
177
    .id = {
178
        .idVendor          = 0x0403,
179
        .idProduct         = 0xfe72,
180
        .bcdDevice         = 0x0400,
181
        .iManufacturer     = STR_MANUFACTURER,
182
        .iProduct          = STR_PRODUCT_BRAILLE,
183
        .iSerialNumber     = STR_SERIALNUMBER,
184
    },
185
    .full = &desc_device,
186
    .str  = desc_strings,
187
};
188

189
static void usb_serial_set_flow_control(USBSerialState *s,
190
                                        uint8_t flow_control)
191
{
192
    USBDevice *dev = USB_DEVICE(s);
193
    USBBus *bus = usb_bus_from_device(dev);
194

195
    /* TODO: ioctl */
196
    s->flow_control = flow_control;
197
    trace_usb_serial_set_flow_control(bus->busnr, dev->addr, flow_control);
198
}
199

200
static void usb_serial_set_xonxoff(USBSerialState *s, int xonxoff)
201
{
202
    USBDevice *dev = USB_DEVICE(s);
203
    USBBus *bus = usb_bus_from_device(dev);
204

205
    s->xon = xonxoff & 0xff;
206
    s->xoff = (xonxoff >> 8) & 0xff;
207

208
    trace_usb_serial_set_xonxoff(bus->busnr, dev->addr, s->xon, s->xoff);
209
}
210

211
static void usb_serial_reset(USBSerialState *s)
212
{
213
    s->event_chr = 0x0d;
214
    s->event_trigger = 0;
215
    s->recv_ptr = 0;
216
    s->recv_used = 0;
217
    /* TODO: purge in char driver */
218
    usb_serial_set_flow_control(s, FTDI_NO_HS);
219
}
220

221
static void usb_serial_handle_reset(USBDevice *dev)
222
{
223
    USBSerialState *s = USB_SERIAL(dev);
224
    USBBus *bus = usb_bus_from_device(dev);
225

226
    trace_usb_serial_reset(bus->busnr, dev->addr);
227

228
    usb_serial_reset(s);
229
    /* TODO: Reset char device, send BREAK? */
230
}
231

232
static uint8_t usb_get_modem_lines(USBSerialState *s)
233
{
234
    int flags;
235
    uint8_t ret;
236

237
    if (qemu_chr_fe_ioctl(&s->cs,
238
                          CHR_IOCTL_SERIAL_GET_TIOCM, &flags) == -ENOTSUP) {
239
        return FTDI_CTS | FTDI_DSR | FTDI_RLSD;
240
    }
241

242
    ret = 0;
243
    if (flags & CHR_TIOCM_CTS) {
244
        ret |= FTDI_CTS;
245
    }
246
    if (flags & CHR_TIOCM_DSR) {
247
        ret |= FTDI_DSR;
248
    }
249
    if (flags & CHR_TIOCM_RI) {
250
        ret |= FTDI_RI;
251
    }
252
    if (flags & CHR_TIOCM_CAR) {
253
        ret |= FTDI_RLSD;
254
    }
255

256
    return ret;
257
}
258

259
static void usb_serial_handle_control(USBDevice *dev, USBPacket *p,
260
                                      int request, int value, int index,
261
                                      int length, uint8_t *data)
262
{
263
    USBSerialState *s = USB_SERIAL(dev);
264
    USBBus *bus = usb_bus_from_device(dev);
265
    int ret;
266

267
    trace_usb_serial_handle_control(bus->busnr, dev->addr, request, value);
268

269
    ret = usb_desc_handle_control(dev, p, request, value, index, length, data);
270
    if (ret >= 0) {
271
        return;
272
    }
273

274
    switch (request) {
275
    case EndpointOutRequest | USB_REQ_CLEAR_FEATURE:
276
        break;
277

278
    /* Class specific requests.  */
279
    case VendorDeviceOutRequest | FTDI_RESET:
280
        switch (value) {
281
        case FTDI_RESET_SIO:
282
            usb_serial_reset(s);
283
            break;
284
        case FTDI_RESET_RX:
285
            s->recv_ptr = 0;
286
            s->recv_used = 0;
287
            /* TODO: purge from char device */
288
            break;
289
        case FTDI_RESET_TX:
290
            /* TODO: purge from char device */
291
            break;
292
        }
293
        break;
294
    case VendorDeviceOutRequest | FTDI_SET_MDM_CTRL:
295
    {
296
        static int flags;
297
        qemu_chr_fe_ioctl(&s->cs, CHR_IOCTL_SERIAL_GET_TIOCM, &flags);
298
        if (value & FTDI_SET_RTS) {
299
            if (value & FTDI_RTS) {
300
                flags |= CHR_TIOCM_RTS;
301
            } else {
302
                flags &= ~CHR_TIOCM_RTS;
303
            }
304
        }
305
        if (value & FTDI_SET_DTR) {
306
            if (value & FTDI_DTR) {
307
                flags |= CHR_TIOCM_DTR;
308
            } else {
309
                flags &= ~CHR_TIOCM_DTR;
310
            }
311
        }
312
        qemu_chr_fe_ioctl(&s->cs, CHR_IOCTL_SERIAL_SET_TIOCM, &flags);
313
        break;
314
    }
315
    case VendorDeviceOutRequest | FTDI_SET_FLOW_CTRL: {
316
        uint8_t flow_control = index >> 8;
317

318
        usb_serial_set_flow_control(s, flow_control);
319
        if (flow_control & FTDI_XON_XOFF_HS) {
320
            usb_serial_set_xonxoff(s, value);
321
        }
322
        break;
323
    }
324
    case VendorDeviceOutRequest | FTDI_SET_BAUD: {
325
        static const int subdivisors8[8] = { 0, 4, 2, 1, 3, 5, 6, 7 };
326
        int subdivisor8 = subdivisors8[((value & 0xc000) >> 14)
327
                                     | ((index & 1) << 2)];
328
        int divisor = value & 0x3fff;
329

330
        /* chip special cases */
331
        if (divisor == 1 && subdivisor8 == 0) {
332
            subdivisor8 = 4;
333
        }
334
        if (divisor == 0 && subdivisor8 == 0) {
335
            divisor = 1;
336
        }
337

338
        s->params.speed = (48000000 / 2) / (8 * divisor + subdivisor8);
339
        trace_usb_serial_set_baud(bus->busnr, dev->addr, s->params.speed);
340
        qemu_chr_fe_ioctl(&s->cs, CHR_IOCTL_SERIAL_SET_PARAMS, &s->params);
341
        break;
342
    }
343
    case VendorDeviceOutRequest | FTDI_SET_DATA:
344
        switch (value & 0xff) {
345
        case 7:
346
            s->params.data_bits = 7;
347
            break;
348
        case 8:
349
            s->params.data_bits = 8;
350
            break;
351
        default:
352
            /*
353
             * According to a comment in Linux's ftdi_sio.c original FTDI
354
             * chips fall back to 8 data bits for unsupported data_bits
355
             */
356
            trace_usb_serial_unsupported_data_bits(bus->busnr, dev->addr,
357
                                                   value & 0xff);
358
            s->params.data_bits = 8;
359
        }
360

361
        switch (value & FTDI_PARITY) {
362
        case 0:
363
            s->params.parity = 'N';
364
            break;
365
        case FTDI_ODD:
366
            s->params.parity = 'O';
367
            break;
368
        case FTDI_EVEN:
369
            s->params.parity = 'E';
370
            break;
371
        default:
372
            trace_usb_serial_unsupported_parity(bus->busnr, dev->addr,
373
                                                value & FTDI_PARITY);
374
            goto fail;
375
        }
376

377
        switch (value & FTDI_STOP) {
378
        case FTDI_STOP1:
379
            s->params.stop_bits = 1;
380
            break;
381
        case FTDI_STOP2:
382
            s->params.stop_bits = 2;
383
            break;
384
        default:
385
            trace_usb_serial_unsupported_stopbits(bus->busnr, dev->addr,
386
                                                  value & FTDI_STOP);
387
            goto fail;
388
        }
389

390
        trace_usb_serial_set_data(bus->busnr, dev->addr, s->params.parity,
391
                                  s->params.data_bits, s->params.stop_bits);
392
        qemu_chr_fe_ioctl(&s->cs, CHR_IOCTL_SERIAL_SET_PARAMS, &s->params);
393
        /* TODO: TX ON/OFF */
394
        break;
395
    case VendorDeviceRequest | FTDI_GET_MDM_ST:
396
        data[0] = usb_get_modem_lines(s) | 1;
397
        data[1] = FTDI_THRE | FTDI_TEMT;
398
        p->actual_length = 2;
399
        break;
400
    case VendorDeviceOutRequest | FTDI_SET_EVENT_CHR:
401
        /* TODO: handle it */
402
        s->event_chr = value;
403
        break;
404
    case VendorDeviceOutRequest | FTDI_SET_ERROR_CHR:
405
        /* TODO: handle it */
406
        s->error_chr = value;
407
        break;
408
    case VendorDeviceOutRequest | FTDI_SET_LATENCY:
409
        s->latency = value;
410
        break;
411
    case VendorDeviceRequest | FTDI_GET_LATENCY:
412
        data[0] = s->latency;
413
        p->actual_length = 1;
414
        break;
415
    default:
416
    fail:
417
        trace_usb_serial_unsupported_control(bus->busnr, dev->addr, request,
418
                                             value);
419
        p->status = USB_RET_STALL;
420
        break;
421
    }
422
}
423

424
static void usb_serial_token_in(USBSerialState *s, USBPacket *p)
425
{
426
    const int max_packet_size = desc_iface0.eps[0].wMaxPacketSize;
427
    int packet_len;
428
    uint8_t header[2];
429

430
    packet_len = p->iov.size;
431
    if (packet_len <= 2) {
432
        p->status = USB_RET_NAK;
433
        return;
434
    }
435

436
    header[0] = usb_get_modem_lines(s) | 1;
437
    /* We do not have the uart details */
438
    /* handle serial break */
439
    if (s->event_trigger && s->event_trigger & FTDI_BI) {
440
        s->event_trigger &= ~FTDI_BI;
441
        header[1] = FTDI_BI;
442
        usb_packet_copy(p, header, 2);
443
        return;
444
    } else {
445
        header[1] = 0;
446
    }
447

448
    if (!s->recv_used) {
449
        p->status = USB_RET_NAK;
450
        return;
451
    }
452

453
    while (s->recv_used && packet_len > 2) {
454
        int first_len, len;
455

456
        len = MIN(packet_len, max_packet_size);
457
        len -= 2;
458
        if (len > s->recv_used) {
459
            len = s->recv_used;
460
        }
461

462
        first_len = RECV_BUF - s->recv_ptr;
463
        if (first_len > len) {
464
            first_len = len;
465
        }
466
        usb_packet_copy(p, header, 2);
467
        usb_packet_copy(p, s->recv_buf + s->recv_ptr, first_len);
468
        if (len > first_len) {
469
            usb_packet_copy(p, s->recv_buf, len - first_len);
470
        }
471
        s->recv_used -= len;
472
        s->recv_ptr = (s->recv_ptr + len) % RECV_BUF;
473
        packet_len -= len + 2;
474
    }
475

476
    return;
477
}
478

479
static void usb_serial_handle_data(USBDevice *dev, USBPacket *p)
480
{
481
    USBSerialState *s = USB_SERIAL(dev);
482
    USBBus *bus = usb_bus_from_device(dev);
483
    uint8_t devep = p->ep->nr;
484
    struct iovec *iov;
485
    int i;
486

487
    switch (p->pid) {
488
    case USB_TOKEN_OUT:
489
        if (devep != 2) {
490
            goto fail;
491
        }
492
        for (i = 0; i < p->iov.niov; i++) {
493
            iov = p->iov.iov + i;
494
            /*
495
             * XXX this blocks entire thread. Rewrite to use
496
             * qemu_chr_fe_write and background I/O callbacks
497
             */
498
            qemu_chr_fe_write_all(&s->cs, iov->iov_base, iov->iov_len);
499
        }
500
        p->actual_length = p->iov.size;
501
        break;
502

503
    case USB_TOKEN_IN:
504
        if (devep != 1) {
505
            goto fail;
506
        }
507
        usb_serial_token_in(s, p);
508
        break;
509

510
    default:
511
        trace_usb_serial_bad_token(bus->busnr, dev->addr);
512
    fail:
513
        p->status = USB_RET_STALL;
514
        break;
515
    }
516
}
517

518
static int usb_serial_can_read(void *opaque)
519
{
520
    USBSerialState *s = opaque;
521

522
    if (!s->dev.attached) {
523
        return 0;
524
    }
525
    return RECV_BUF - s->recv_used;
526
}
527

528
static void usb_serial_read(void *opaque, const uint8_t *buf, int size)
529
{
530
    USBSerialState *s = opaque;
531
    int first_size, start;
532

533
    /* room in the buffer? */
534
    if (size > (RECV_BUF - s->recv_used)) {
535
        size = RECV_BUF - s->recv_used;
536
    }
537

538
    start = s->recv_ptr + s->recv_used;
539
    if (start < RECV_BUF) {
540
        /* copy data to end of buffer */
541
        first_size = RECV_BUF - start;
542
        if (first_size > size) {
543
            first_size = size;
544
        }
545

546
        memcpy(s->recv_buf + start, buf, first_size);
547

548
        /* wrap around to front if needed */
549
        if (size > first_size) {
550
            memcpy(s->recv_buf, buf + first_size, size - first_size);
551
        }
552
    } else {
553
        start -= RECV_BUF;
554
        memcpy(s->recv_buf + start, buf, size);
555
    }
556
    s->recv_used += size;
557

558
    usb_wakeup(s->intr, 0);
559
}
560

561
static void usb_serial_event(void *opaque, QEMUChrEvent event)
562
{
563
    USBSerialState *s = opaque;
564

565
    switch (event) {
566
    case CHR_EVENT_BREAK:
567
        s->event_trigger |= FTDI_BI;
568
        break;
569
    case CHR_EVENT_OPENED:
570
        if (!s->always_plugged && !s->dev.attached) {
571
            usb_device_attach(&s->dev, &error_abort);
572
        }
573
        break;
574
    case CHR_EVENT_CLOSED:
575
        if (!s->always_plugged && s->dev.attached) {
576
            usb_device_detach(&s->dev);
577
        }
578
        break;
579
    case CHR_EVENT_MUX_IN:
580
    case CHR_EVENT_MUX_OUT:
581
        /* Ignore */
582
        break;
583
    }
584
}
585

586
static void usb_serial_realize(USBDevice *dev, Error **errp)
587
{
588
    USBSerialState *s = USB_SERIAL(dev);
589
    Error *local_err = NULL;
590

591
    usb_desc_create_serial(dev);
592
    usb_desc_init(dev);
593
    dev->auto_attach = 0;
594

595
    if (!qemu_chr_fe_backend_connected(&s->cs)) {
596
        error_setg(errp, "Property chardev is required");
597
        return;
598
    }
599

600
    usb_check_attach(dev, &local_err);
601
    if (local_err) {
602
        error_propagate(errp, local_err);
603
        return;
604
    }
605

606
    qemu_chr_fe_set_handlers(&s->cs, usb_serial_can_read, usb_serial_read,
607
                             usb_serial_event, NULL, s, NULL, true);
608
    usb_serial_handle_reset(dev);
609

610
    if ((s->always_plugged || qemu_chr_fe_backend_open(&s->cs)) &&
611
        !dev->attached) {
612
        usb_device_attach(dev, &error_abort);
613
    }
614
    s->intr = usb_ep_get(dev, USB_TOKEN_IN, 1);
615
}
616

617
static USBDevice *usb_braille_init(void)
618
{
619
    USBDevice *dev;
620
    Chardev *cdrv;
621

622
    cdrv = qemu_chr_new("braille", "braille", NULL);
623
    if (!cdrv) {
624
        return NULL;
625
    }
626

627
    dev = usb_new("usb-braille");
628
    qdev_prop_set_chr(&dev->qdev, "chardev", cdrv);
629
    return dev;
630
}
631

632
static const VMStateDescription vmstate_usb_serial = {
633
    .name = "usb-serial",
634
    .unmigratable = 1,
635
};
636

637
static Property serial_properties[] = {
638
    DEFINE_PROP_CHR("chardev", USBSerialState, cs),
639
    DEFINE_PROP_BOOL("always-plugged", USBSerialState, always_plugged, false),
640
    DEFINE_PROP_END_OF_LIST(),
641
};
642

643
static void usb_serial_dev_class_init(ObjectClass *klass, void *data)
644
{
645
    DeviceClass *dc = DEVICE_CLASS(klass);
646
    USBDeviceClass *uc = USB_DEVICE_CLASS(klass);
647

648
    uc->realize        = usb_serial_realize;
649
    uc->handle_reset   = usb_serial_handle_reset;
650
    uc->handle_control = usb_serial_handle_control;
651
    uc->handle_data    = usb_serial_handle_data;
652
    dc->vmsd = &vmstate_usb_serial;
653
    set_bit(DEVICE_CATEGORY_INPUT, dc->categories);
654
}
655

656
static const TypeInfo usb_serial_dev_type_info = {
657
    .name = TYPE_USB_SERIAL,
658
    .parent = TYPE_USB_DEVICE,
659
    .instance_size = sizeof(USBSerialState),
660
    .abstract = true,
661
    .class_init = usb_serial_dev_class_init,
662
};
663

664
static void usb_serial_class_initfn(ObjectClass *klass, void *data)
665
{
666
    DeviceClass *dc = DEVICE_CLASS(klass);
667
    USBDeviceClass *uc = USB_DEVICE_CLASS(klass);
668

669
    uc->product_desc   = "QEMU USB Serial";
670
    uc->usb_desc       = &desc_serial;
671
    device_class_set_props(dc, serial_properties);
672
}
673

674
static const TypeInfo serial_info = {
675
    .name          = "usb-serial",
676
    .parent        = TYPE_USB_SERIAL,
677
    .class_init    = usb_serial_class_initfn,
678
};
679

680
static Property braille_properties[] = {
681
    DEFINE_PROP_CHR("chardev", USBSerialState, cs),
682
    DEFINE_PROP_END_OF_LIST(),
683
};
684

685
static void usb_braille_class_initfn(ObjectClass *klass, void *data)
686
{
687
    DeviceClass *dc = DEVICE_CLASS(klass);
688
    USBDeviceClass *uc = USB_DEVICE_CLASS(klass);
689

690
    uc->product_desc   = "QEMU USB Braille";
691
    uc->usb_desc       = &desc_braille;
692
    device_class_set_props(dc, braille_properties);
693
}
694

695
static const TypeInfo braille_info = {
696
    .name          = "usb-braille",
697
    .parent        = TYPE_USB_SERIAL,
698
    .class_init    = usb_braille_class_initfn,
699
};
700

701
static void usb_serial_register_types(void)
702
{
703
    type_register_static(&usb_serial_dev_type_info);
704
    type_register_static(&serial_info);
705
    type_register_static(&braille_info);
706
    usb_legacy_register("usb-braille", "braille", usb_braille_init);
707
}
708

709
type_init(usb_serial_register_types)
710