aboutsummaryrefslogtreecommitdiff
path: root/hw/usb/dev-hub.c
blob: 504c98c35008f0f0490967fc9343d36300e59322 (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
571
572
573
574
575
576
577
578
579
580
581
582
583
/*
 * QEMU USB HUB emulation
 *
 * Copyright (c) 2005 Fabrice Bellard
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */
#include "qemu-common.h"
#include "trace.h"
#include "hw/usb.h"
#include "hw/usb/desc.h"

#define NUM_PORTS 8

typedef struct USBHubPort {
    USBPort port;
    uint16_t wPortStatus;
    uint16_t wPortChange;
} USBHubPort;

typedef struct USBHubState {
    USBDevice dev;
    USBEndpoint *intr;
    USBHubPort ports[NUM_PORTS];
} USBHubState;

#define ClearHubFeature		(0x2000 | USB_REQ_CLEAR_FEATURE)
#define ClearPortFeature	(0x2300 | USB_REQ_CLEAR_FEATURE)
#define GetHubDescriptor	(0xa000 | USB_REQ_GET_DESCRIPTOR)
#define GetHubStatus		(0xa000 | USB_REQ_GET_STATUS)
#define GetPortStatus		(0xa300 | USB_REQ_GET_STATUS)
#define SetHubFeature		(0x2000 | USB_REQ_SET_FEATURE)
#define SetPortFeature		(0x2300 | USB_REQ_SET_FEATURE)

#define PORT_STAT_CONNECTION	0x0001
#define PORT_STAT_ENABLE	0x0002
#define PORT_STAT_SUSPEND	0x0004
#define PORT_STAT_OVERCURRENT	0x0008
#define PORT_STAT_RESET		0x0010
#define PORT_STAT_POWER		0x0100
#define PORT_STAT_LOW_SPEED	0x0200
#define PORT_STAT_HIGH_SPEED    0x0400
#define PORT_STAT_TEST          0x0800
#define PORT_STAT_INDICATOR     0x1000

#define PORT_STAT_C_CONNECTION	0x0001
#define PORT_STAT_C_ENABLE	0x0002
#define PORT_STAT_C_SUSPEND	0x0004
#define PORT_STAT_C_OVERCURRENT	0x0008
#define PORT_STAT_C_RESET	0x0010

#define PORT_CONNECTION	        0
#define PORT_ENABLE		1
#define PORT_SUSPEND		2
#define PORT_OVERCURRENT	3
#define PORT_RESET		4
#define PORT_POWER		8
#define PORT_LOWSPEED		9
#define PORT_HIGHSPEED		10
#define PORT_C_CONNECTION	16
#define PORT_C_ENABLE		17
#define PORT_C_SUSPEND		18
#define PORT_C_OVERCURRENT	19
#define PORT_C_RESET		20
#define PORT_TEST               21
#define PORT_INDICATOR          22

/* same as Linux kernel root hubs */

enum {
    STR_MANUFACTURER = 1,
    STR_PRODUCT,
    STR_SERIALNUMBER,
};

static const USBDescStrings desc_strings = {
    [STR_MANUFACTURER] = "QEMU",
    [STR_PRODUCT]      = "QEMU USB Hub",
    [STR_SERIALNUMBER] = "314159",
};

static const USBDescIface desc_iface_hub = {
    .bInterfaceNumber              = 0,
    .bNumEndpoints                 = 1,
    .bInterfaceClass               = USB_CLASS_HUB,
    .eps = (USBDescEndpoint[]) {
        {
            .bEndpointAddress      = USB_DIR_IN | 0x01,
            .bmAttributes          = USB_ENDPOINT_XFER_INT,
            .wMaxPacketSize        = 1 + (NUM_PORTS + 7) / 8,
            .bInterval             = 0xff,
        },
    }
};

static const USBDescDevice desc_device_hub = {
    .bcdUSB                        = 0x0110,
    .bDeviceClass                  = USB_CLASS_HUB,
    .bMaxPacketSize0               = 8,
    .bNumConfigurations            = 1,
    .confs = (USBDescConfig[]) {
        {
            .bNumInterfaces        = 1,
            .bConfigurationValue   = 1,
            .bmAttributes          = 0xe0,
            .nif = 1,
            .ifs = &desc_iface_hub,
        },
    },
};

static const USBDesc desc_hub = {
    .id = {
        .idVendor          = 0x0409,
        .idProduct         = 0x55aa,
        .bcdDevice         = 0x0101,
        .iManufacturer     = STR_MANUFACTURER,
        .iProduct          = STR_PRODUCT,
        .iSerialNumber     = STR_SERIALNUMBER,
    },
    .full = &desc_device_hub,
    .str  = desc_strings,
};

static const uint8_t qemu_hub_hub_descriptor[] =
{
	0x00,			/*  u8  bLength; patched in later */
	0x29,			/*  u8  bDescriptorType; Hub-descriptor */
	0x00,			/*  u8  bNbrPorts; (patched later) */
	0x0a,			/* u16  wHubCharacteristics; */
	0x00,			/*   (per-port OC, no power switching) */
	0x01,			/*  u8  bPwrOn2pwrGood; 2ms */
	0x00			/*  u8  bHubContrCurrent; 0 mA */

        /* DeviceRemovable and PortPwrCtrlMask patched in later */
};

static void usb_hub_attach(USBPort *port1)
{
    USBHubState *s = port1->opaque;
    USBHubPort *port = &s->ports[port1->index];

    trace_usb_hub_attach(s->dev.addr, port1->index + 1);
    port->wPortStatus |= PORT_STAT_CONNECTION;
    port->wPortChange |= PORT_STAT_C_CONNECTION;
    if (port->port.dev->speed == USB_SPEED_LOW) {
        port->wPortStatus |= PORT_STAT_LOW_SPEED;
    } else {
        port->wPortStatus &= ~PORT_STAT_LOW_SPEED;
    }
    usb_wakeup(s->intr, 0);
}

static void usb_hub_detach(USBPort *port1)
{
    USBHubState *s = port1->opaque;
    USBHubPort *port = &s->ports[port1->index];

    trace_usb_hub_detach(s->dev.addr, port1->index + 1);
    usb_wakeup(s->intr, 0);

    /* Let upstream know the device on this port is gone */
    s->dev.port->ops->child_detach(s->dev.port, port1->dev);

    port->wPortStatus &= ~PORT_STAT_CONNECTION;
    port->wPortChange |= PORT_STAT_C_CONNECTION;
    if (port->wPortStatus & PORT_STAT_ENABLE) {
        port->wPortStatus &= ~PORT_STAT_ENABLE;
        port->wPortChange |= PORT_STAT_C_ENABLE;
    }
    usb_wakeup(s->intr, 0);
}

static void usb_hub_child_detach(USBPort *port1, USBDevice *child)
{
    USBHubState *s = port1->opaque;

    /* Pass along upstream */
    s->dev.port->ops->child_detach(s->dev.port, child);
}

static void usb_hub_wakeup(USBPort *port1)
{
    USBHubState *s = port1->opaque;
    USBHubPort *port = &s->ports[port1->index];

    if (port->wPortStatus & PORT_STAT_SUSPEND) {
        port->wPortChange |= PORT_STAT_C_SUSPEND;
        usb_wakeup(s->intr, 0);
    }
}

static void usb_hub_complete(USBPort *port, USBPacket *packet)
{
    USBHubState *s = port->opaque;

    /*
     * Just pass it along upstream for now.
     *
     * If we ever implement usb 2.0 split transactions this will
     * become a little more complicated ...
     *
     * Can't use usb_packet_complete() here because packet->owner is
     * cleared already, go call the ->complete() callback directly
     * instead.
     */
    s->dev.port->ops->complete(s->dev.port, packet);
}

static USBDevice *usb_hub_find_device(USBDevice *dev, uint8_t addr)
{
    USBHubState *s = DO_UPCAST(USBHubState, dev, dev);
    USBHubPort *port;
    USBDevice *downstream;
    int i;

    for (i = 0; i < NUM_PORTS; i++) {
        port = &s->ports[i];
        if (!(port->wPortStatus & PORT_STAT_ENABLE)) {
            continue;
        }
        downstream = usb_find_device(&port->port, addr);
        if (downstream != NULL) {
            return downstream;
        }
    }
    return NULL;
}

static void usb_hub_handle_reset(USBDevice *dev)
{
    USBHubState *s = DO_UPCAST(USBHubState, dev, dev);
    USBHubPort *port;
    int i;

    trace_usb_hub_reset(s->dev.addr);
    for (i = 0; i < NUM_PORTS; i++) {
        port = s->ports + i;
        port->wPortStatus = PORT_STAT_POWER;
        port->wPortChange = 0;
        if (port->port.dev && port->port.dev->attached) {
            port->wPortStatus |= PORT_STAT_CONNECTION;
            port->wPortChange |= PORT_STAT_C_CONNECTION;
            if (port->port.dev->speed == USB_SPEED_LOW) {
                port->wPortStatus |= PORT_STAT_LOW_SPEED;
            }
        }
    }
}

static const char *feature_name(int feature)
{
    static const char *name[] = {
        [PORT_CONNECTION]    = "connection",
        [PORT_ENABLE]        = "enable",
        [PORT_SUSPEND]       = "suspend",
        [PORT_OVERCURRENT]   = "overcurrent",
        [PORT_RESET]         = "reset",
        [PORT_POWER]         = "power",
        [PORT_LOWSPEED]      = "lowspeed",
        [PORT_HIGHSPEED]     = "highspeed",
        [PORT_C_CONNECTION]  = "change connection",
        [PORT_C_ENABLE]      = "change enable",
        [PORT_C_SUSPEND]     = "change suspend",
        [PORT_C_OVERCURRENT] = "change overcurrent",
        [PORT_C_RESET]       = "change reset",
        [PORT_TEST]          = "test",
        [PORT_INDICATOR]     = "indicator",
    };
    if (feature < 0 || feature >= ARRAY_SIZE(name)) {
        return "?";
    }
    return name[feature] ?: "?";
}

static void usb_hub_handle_control(USBDevice *dev, USBPacket *p,
               int request, int value, int index, int length, uint8_t *data)
{
    USBHubState *s = (USBHubState *)dev;
    int ret;

    trace_usb_hub_control(s->dev.addr, request, value, index, length);

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

    switch(request) {
    case EndpointOutRequest | USB_REQ_CLEAR_FEATURE:
        if (value == 0 && index != 0x81) { /* clear ep halt */
            goto fail;
        }
        break;
        /* usb specific requests */
    case GetHubStatus:
        data[0] = 0;
        data[1] = 0;
        data[2] = 0;
        data[3] = 0;
        p->actual_length = 4;
        break;
    case GetPortStatus:
        {
            unsigned int n = index - 1;
            USBHubPort *port;
            if (n >= NUM_PORTS) {
                goto fail;
            }
            port = &s->ports[n];
            trace_usb_hub_get_port_status(s->dev.addr, index,
                                          port->wPortStatus,
                                          port->wPortChange);
            data[0] = port->wPortStatus;
            data[1] = port->wPortStatus >> 8;
            data[2] = port->wPortChange;
            data[3] = port->wPortChange >> 8;
            p->actual_length = 4;
        }
        break;
    case SetHubFeature:
    case ClearHubFeature:
        if (value != 0 && value != 1) {
            goto fail;
        }
        break;
    case SetPortFeature:
        {
            unsigned int n = index - 1;
            USBHubPort *port;
            USBDevice *dev;

            trace_usb_hub_set_port_feature(s->dev.addr, index,
                                           feature_name(value));

            if (n >= NUM_PORTS) {
                goto fail;
            }
            port = &s->ports[n];
            dev = port->port.dev;
            switch(value) {
            case PORT_SUSPEND:
                port->wPortStatus |= PORT_STAT_SUSPEND;
                break;
            case PORT_RESET:
                if (dev && dev->attached) {
                    usb_device_reset(dev);
                    port->wPortChange |= PORT_STAT_C_RESET;
                    /* set enable bit */
                    port->wPortStatus |= PORT_STAT_ENABLE;
                    usb_wakeup(s->intr, 0);
                }
                break;
            case PORT_POWER:
                break;
            default:
                goto fail;
            }
        }
        break;
    case ClearPortFeature:
        {
            unsigned int n = index - 1;
            USBHubPort *port;

            trace_usb_hub_clear_port_feature(s->dev.addr, index,
                                             feature_name(value));

            if (n >= NUM_PORTS) {
                goto fail;
            }
            port = &s->ports[n];
            switch(value) {
            case PORT_ENABLE:
                port->wPortStatus &= ~PORT_STAT_ENABLE;
                break;
            case PORT_C_ENABLE:
                port->wPortChange &= ~PORT_STAT_C_ENABLE;
                break;
            case PORT_SUSPEND:
                port->wPortStatus &= ~PORT_STAT_SUSPEND;
                break;
            case PORT_C_SUSPEND:
                port->wPortChange &= ~PORT_STAT_C_SUSPEND;
                break;
            case PORT_C_CONNECTION:
                port->wPortChange &= ~PORT_STAT_C_CONNECTION;
                break;
            case PORT_C_OVERCURRENT:
                port->wPortChange &= ~PORT_STAT_C_OVERCURRENT;
                break;
            case PORT_C_RESET:
                port->wPortChange &= ~PORT_STAT_C_RESET;
                break;
            default:
                goto fail;
            }
        }
        break;
    case GetHubDescriptor:
        {
            unsigned int n, limit, var_hub_size = 0;
            memcpy(data, qemu_hub_hub_descriptor,
                   sizeof(qemu_hub_hub_descriptor));
            data[2] = NUM_PORTS;

            /* fill DeviceRemovable bits */
            limit = ((NUM_PORTS + 1 + 7) / 8) + 7;
            for (n = 7; n < limit; n++) {
                data[n] = 0x00;
                var_hub_size++;
            }

            /* fill PortPwrCtrlMask bits */
            limit = limit + ((NUM_PORTS + 7) / 8);
            for (;n < limit; n++) {
                data[n] = 0xff;
                var_hub_size++;
            }

            p->actual_length = sizeof(qemu_hub_hub_descriptor) + var_hub_size;
            data[0] = p->actual_length;
            break;
        }
    default:
    fail:
        p->status = USB_RET_STALL;
        break;
    }
}

static void usb_hub_handle_data(USBDevice *dev, USBPacket *p)
{
    USBHubState *s = (USBHubState *)dev;

    switch(p->pid) {
    case USB_TOKEN_IN:
        if (p->ep->nr == 1) {
            USBHubPort *port;
            unsigned int status;
            uint8_t buf[4];
            int i, n;
            n = (NUM_PORTS + 1 + 7) / 8;
            if (p->iov.size == 1) { /* FreeBSD workaround */
                n = 1;
            } else if (n > p->iov.size) {
                p->status = USB_RET_BABBLE;
                return;
            }
            status = 0;
            for(i = 0; i < NUM_PORTS; i++) {
                port = &s->ports[i];
                if (port->wPortChange)
                    status |= (1 << (i + 1));
            }
            if (status != 0) {
                for(i = 0; i < n; i++) {
                    buf[i] = status >> (8 * i);
                }
                usb_packet_copy(p, buf, n);
            } else {
                p->status = USB_RET_NAK; /* usb11 11.13.1 */
            }
        } else {
            goto fail;
        }
        break;
    case USB_TOKEN_OUT:
    default:
    fail:
        p->status = USB_RET_STALL;
        break;
    }
}

static void usb_hub_handle_destroy(USBDevice *dev)
{
    USBHubState *s = (USBHubState *)dev;
    int i;

    for (i = 0; i < NUM_PORTS; i++) {
        usb_unregister_port(usb_bus_from_device(dev),
                            &s->ports[i].port);
    }
}

static USBPortOps usb_hub_port_ops = {
    .attach = usb_hub_attach,
    .detach = usb_hub_detach,
    .child_detach = usb_hub_child_detach,
    .wakeup = usb_hub_wakeup,
    .complete = usb_hub_complete,
};

static int usb_hub_initfn(USBDevice *dev)
{
    USBHubState *s = DO_UPCAST(USBHubState, dev, dev);
    USBHubPort *port;
    int i;

    usb_desc_create_serial(dev);
    usb_desc_init(dev);
    s->intr = usb_ep_get(dev, USB_TOKEN_IN, 1);
    for (i = 0; i < NUM_PORTS; i++) {
        port = &s->ports[i];
        usb_register_port(usb_bus_from_device(dev),
                          &port->port, s, i, &usb_hub_port_ops,
                          USB_SPEED_MASK_LOW | USB_SPEED_MASK_FULL);
        usb_port_location(&port->port, dev->port, i+1);
    }
    usb_hub_handle_reset(dev);
    return 0;
}

static const VMStateDescription vmstate_usb_hub_port = {
    .name = "usb-hub-port",
    .version_id = 1,
    .minimum_version_id = 1,
    .fields = (VMStateField []) {
        VMSTATE_UINT16(wPortStatus, USBHubPort),
        VMSTATE_UINT16(wPortChange, USBHubPort),
        VMSTATE_END_OF_LIST()
    }
};

static const VMStateDescription vmstate_usb_hub = {
    .name = "usb-hub",
    .version_id = 1,
    .minimum_version_id = 1,
    .fields = (VMStateField []) {
        VMSTATE_USB_DEVICE(dev, USBHubState),
        VMSTATE_STRUCT_ARRAY(ports, USBHubState, NUM_PORTS, 0,
                             vmstate_usb_hub_port, USBHubPort),
        VMSTATE_END_OF_LIST()
    }
};

static void usb_hub_class_initfn(ObjectClass *klass, void *data)
{
    DeviceClass *dc = DEVICE_CLASS(klass);
    USBDeviceClass *uc = USB_DEVICE_CLASS(klass);

    uc->init           = usb_hub_initfn;
    uc->product_desc   = "QEMU USB Hub";
    uc->usb_desc       = &desc_hub;
    uc->find_device    = usb_hub_find_device;
    uc->handle_reset   = usb_hub_handle_reset;
    uc->handle_control = usb_hub_handle_control;
    uc->handle_data    = usb_hub_handle_data;
    uc->handle_destroy = usb_hub_handle_destroy;
    dc->fw_name = "hub";
    dc->vmsd = &vmstate_usb_hub;
}

static const TypeInfo hub_info = {
    .name          = "usb-hub",
    .parent        = TYPE_USB_DEVICE,
    .instance_size = sizeof(USBHubState),
    .class_init    = usb_hub_class_initfn,
};

static void usb_hub_register_types(void)
{
    type_register_static(&hub_info);
}

type_init(usb_hub_register_types)