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[qemu.git] / hw / usb-hub.c
1 /*
2  * QEMU USB HUB emulation
3  *
4  * Copyright (c) 2005 Fabrice Bellard
5  *
6  * Permission is hereby granted, free of charge, to any person obtaining a copy
7  * of this software and associated documentation files (the "Software"), to deal
8  * in the Software without restriction, including without limitation the rights
9  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
10  * copies of the Software, and to permit persons to whom the Software is
11  * furnished to do so, subject to the following conditions:
12  *
13  * The above copyright notice and this permission notice shall be included in
14  * all copies or substantial portions of the Software.
15  *
16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
19  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
21  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
22  * THE SOFTWARE.
23  */
24 #include "qemu-common.h"
25 #include "usb.h"
26 #include "usb-desc.h"
27
28 //#define DEBUG
29
30 #define NUM_PORTS 8
31
32 typedef struct USBHubPort {
33     USBPort port;
34     uint16_t wPortStatus;
35     uint16_t wPortChange;
36 } USBHubPort;
37
38 typedef struct USBHubState {
39     USBDevice dev;
40     USBHubPort ports[NUM_PORTS];
41 } USBHubState;
42
43 #define ClearHubFeature         (0x2000 | USB_REQ_CLEAR_FEATURE)
44 #define ClearPortFeature        (0x2300 | USB_REQ_CLEAR_FEATURE)
45 #define GetHubDescriptor        (0xa000 | USB_REQ_GET_DESCRIPTOR)
46 #define GetHubStatus            (0xa000 | USB_REQ_GET_STATUS)
47 #define GetPortStatus           (0xa300 | USB_REQ_GET_STATUS)
48 #define SetHubFeature           (0x2000 | USB_REQ_SET_FEATURE)
49 #define SetPortFeature          (0x2300 | USB_REQ_SET_FEATURE)
50
51 #define PORT_STAT_CONNECTION    0x0001
52 #define PORT_STAT_ENABLE        0x0002
53 #define PORT_STAT_SUSPEND       0x0004
54 #define PORT_STAT_OVERCURRENT   0x0008
55 #define PORT_STAT_RESET         0x0010
56 #define PORT_STAT_POWER         0x0100
57 #define PORT_STAT_LOW_SPEED     0x0200
58 #define PORT_STAT_HIGH_SPEED    0x0400
59 #define PORT_STAT_TEST          0x0800
60 #define PORT_STAT_INDICATOR     0x1000
61
62 #define PORT_STAT_C_CONNECTION  0x0001
63 #define PORT_STAT_C_ENABLE      0x0002
64 #define PORT_STAT_C_SUSPEND     0x0004
65 #define PORT_STAT_C_OVERCURRENT 0x0008
66 #define PORT_STAT_C_RESET       0x0010
67
68 #define PORT_CONNECTION         0
69 #define PORT_ENABLE             1
70 #define PORT_SUSPEND            2
71 #define PORT_OVERCURRENT        3
72 #define PORT_RESET              4
73 #define PORT_POWER              8
74 #define PORT_LOWSPEED           9
75 #define PORT_HIGHSPEED          10
76 #define PORT_C_CONNECTION       16
77 #define PORT_C_ENABLE           17
78 #define PORT_C_SUSPEND          18
79 #define PORT_C_OVERCURRENT      19
80 #define PORT_C_RESET            20
81 #define PORT_TEST               21
82 #define PORT_INDICATOR          22
83
84 /* same as Linux kernel root hubs */
85
86 enum {
87     STR_MANUFACTURER = 1,
88     STR_PRODUCT,
89     STR_SERIALNUMBER,
90 };
91
92 static const USBDescStrings desc_strings = {
93     [STR_MANUFACTURER] = "QEMU " QEMU_VERSION,
94     [STR_PRODUCT]      = "QEMU USB Hub",
95     [STR_SERIALNUMBER] = "314159",
96 };
97
98 static const USBDescIface desc_iface_hub = {
99     .bInterfaceNumber              = 0,
100     .bNumEndpoints                 = 1,
101     .bInterfaceClass               = USB_CLASS_HUB,
102     .eps = (USBDescEndpoint[]) {
103         {
104             .bEndpointAddress      = USB_DIR_IN | 0x01,
105             .bmAttributes          = USB_ENDPOINT_XFER_INT,
106             .wMaxPacketSize        = 1 + (NUM_PORTS + 7) / 8,
107             .bInterval             = 0xff,
108         },
109     }
110 };
111
112 static const USBDescDevice desc_device_hub = {
113     .bcdUSB                        = 0x0110,
114     .bDeviceClass                  = USB_CLASS_HUB,
115     .bMaxPacketSize0               = 8,
116     .bNumConfigurations            = 1,
117     .confs = (USBDescConfig[]) {
118         {
119             .bNumInterfaces        = 1,
120             .bConfigurationValue   = 1,
121             .bmAttributes          = 0xe0,
122             .nif = 1,
123             .ifs = &desc_iface_hub,
124         },
125     },
126 };
127
128 static const USBDesc desc_hub = {
129     .id = {
130         .idVendor          = 0x0409,
131         .idProduct         = 0x55aa,
132         .bcdDevice         = 0x0101,
133         .iManufacturer     = STR_MANUFACTURER,
134         .iProduct          = STR_PRODUCT,
135         .iSerialNumber     = STR_SERIALNUMBER,
136     },
137     .full = &desc_device_hub,
138     .str  = desc_strings,
139 };
140
141 static const uint8_t qemu_hub_hub_descriptor[] =
142 {
143         0x00,                   /*  u8  bLength; patched in later */
144         0x29,                   /*  u8  bDescriptorType; Hub-descriptor */
145         0x00,                   /*  u8  bNbrPorts; (patched later) */
146         0x0a,                   /* u16  wHubCharacteristics; */
147         0x00,                   /*   (per-port OC, no power switching) */
148         0x01,                   /*  u8  bPwrOn2pwrGood; 2ms */
149         0x00                    /*  u8  bHubContrCurrent; 0 mA */
150
151         /* DeviceRemovable and PortPwrCtrlMask patched in later */
152 };
153
154 static void usb_hub_attach(USBPort *port1)
155 {
156     USBHubState *s = port1->opaque;
157     USBHubPort *port = &s->ports[port1->index];
158
159     port->wPortStatus |= PORT_STAT_CONNECTION;
160     port->wPortChange |= PORT_STAT_C_CONNECTION;
161     if (port->port.dev->speed == USB_SPEED_LOW) {
162         port->wPortStatus |= PORT_STAT_LOW_SPEED;
163     } else {
164         port->wPortStatus &= ~PORT_STAT_LOW_SPEED;
165     }
166     usb_wakeup(&s->dev);
167 }
168
169 static void usb_hub_detach(USBPort *port1)
170 {
171     USBHubState *s = port1->opaque;
172     USBHubPort *port = &s->ports[port1->index];
173
174     usb_wakeup(&s->dev);
175
176     /* Let upstream know the device on this port is gone */
177     s->dev.port->ops->child_detach(s->dev.port, port1->dev);
178
179     port->wPortStatus &= ~PORT_STAT_CONNECTION;
180     port->wPortChange |= PORT_STAT_C_CONNECTION;
181     if (port->wPortStatus & PORT_STAT_ENABLE) {
182         port->wPortStatus &= ~PORT_STAT_ENABLE;
183         port->wPortChange |= PORT_STAT_C_ENABLE;
184     }
185 }
186
187 static void usb_hub_child_detach(USBPort *port1, USBDevice *child)
188 {
189     USBHubState *s = port1->opaque;
190
191     /* Pass along upstream */
192     s->dev.port->ops->child_detach(s->dev.port, child);
193 }
194
195 static void usb_hub_wakeup(USBPort *port1)
196 {
197     USBHubState *s = port1->opaque;
198     USBHubPort *port = &s->ports[port1->index];
199
200     if (port->wPortStatus & PORT_STAT_SUSPEND) {
201         port->wPortChange |= PORT_STAT_C_SUSPEND;
202         usb_wakeup(&s->dev);
203     }
204 }
205
206 static void usb_hub_complete(USBPort *port, USBPacket *packet)
207 {
208     USBHubState *s = port->opaque;
209
210     /*
211      * Just pass it along upstream for now.
212      *
213      * If we ever implement usb 2.0 split transactions this will
214      * become a little more complicated ...
215      *
216      * Can't use usb_packet_complete() here because packet->owner is
217      * cleared already, go call the ->complete() callback directly
218      * instead.
219      */
220     s->dev.port->ops->complete(s->dev.port, packet);
221 }
222
223 static void usb_hub_handle_reset(USBDevice *dev)
224 {
225     USBHubState *s = DO_UPCAST(USBHubState, dev, dev);
226     USBHubPort *port;
227     int i;
228
229     for (i = 0; i < NUM_PORTS; i++) {
230         port = s->ports + i;
231         port->wPortStatus = PORT_STAT_POWER;
232         port->wPortChange = 0;
233         if (port->port.dev && port->port.dev->attached) {
234             port->wPortStatus |= PORT_STAT_CONNECTION;
235             port->wPortChange |= PORT_STAT_C_CONNECTION;
236             if (port->port.dev->speed == USB_SPEED_LOW) {
237                 port->wPortStatus |= PORT_STAT_LOW_SPEED;
238             }
239         }
240     }
241 }
242
243 static int usb_hub_handle_control(USBDevice *dev, USBPacket *p,
244                int request, int value, int index, int length, uint8_t *data)
245 {
246     USBHubState *s = (USBHubState *)dev;
247     int ret;
248
249     ret = usb_desc_handle_control(dev, p, request, value, index, length, data);
250     if (ret >= 0) {
251         return ret;
252     }
253
254     switch(request) {
255     case EndpointOutRequest | USB_REQ_CLEAR_FEATURE:
256         if (value == 0 && index != 0x81) { /* clear ep halt */
257             goto fail;
258         }
259         ret = 0;
260         break;
261         /* usb specific requests */
262     case GetHubStatus:
263         data[0] = 0;
264         data[1] = 0;
265         data[2] = 0;
266         data[3] = 0;
267         ret = 4;
268         break;
269     case GetPortStatus:
270         {
271             unsigned int n = index - 1;
272             USBHubPort *port;
273             if (n >= NUM_PORTS) {
274                 goto fail;
275             }
276             port = &s->ports[n];
277             data[0] = port->wPortStatus;
278             data[1] = port->wPortStatus >> 8;
279             data[2] = port->wPortChange;
280             data[3] = port->wPortChange >> 8;
281             ret = 4;
282         }
283         break;
284     case SetHubFeature:
285     case ClearHubFeature:
286         if (value == 0 || value == 1) {
287         } else {
288             goto fail;
289         }
290         ret = 0;
291         break;
292     case SetPortFeature:
293         {
294             unsigned int n = index - 1;
295             USBHubPort *port;
296             USBDevice *dev;
297             if (n >= NUM_PORTS) {
298                 goto fail;
299             }
300             port = &s->ports[n];
301             dev = port->port.dev;
302             switch(value) {
303             case PORT_SUSPEND:
304                 port->wPortStatus |= PORT_STAT_SUSPEND;
305                 break;
306             case PORT_RESET:
307                 if (dev && dev->attached) {
308                     usb_send_msg(dev, USB_MSG_RESET);
309                     port->wPortChange |= PORT_STAT_C_RESET;
310                     /* set enable bit */
311                     port->wPortStatus |= PORT_STAT_ENABLE;
312                 }
313                 break;
314             case PORT_POWER:
315                 break;
316             default:
317                 goto fail;
318             }
319             ret = 0;
320         }
321         break;
322     case ClearPortFeature:
323         {
324             unsigned int n = index - 1;
325             USBHubPort *port;
326
327             if (n >= NUM_PORTS) {
328                 goto fail;
329             }
330             port = &s->ports[n];
331             switch(value) {
332             case PORT_ENABLE:
333                 port->wPortStatus &= ~PORT_STAT_ENABLE;
334                 break;
335             case PORT_C_ENABLE:
336                 port->wPortChange &= ~PORT_STAT_C_ENABLE;
337                 break;
338             case PORT_SUSPEND:
339                 port->wPortStatus &= ~PORT_STAT_SUSPEND;
340                 break;
341             case PORT_C_SUSPEND:
342                 port->wPortChange &= ~PORT_STAT_C_SUSPEND;
343                 break;
344             case PORT_C_CONNECTION:
345                 port->wPortChange &= ~PORT_STAT_C_CONNECTION;
346                 break;
347             case PORT_C_OVERCURRENT:
348                 port->wPortChange &= ~PORT_STAT_C_OVERCURRENT;
349                 break;
350             case PORT_C_RESET:
351                 port->wPortChange &= ~PORT_STAT_C_RESET;
352                 break;
353             default:
354                 goto fail;
355             }
356             ret = 0;
357         }
358         break;
359     case GetHubDescriptor:
360         {
361             unsigned int n, limit, var_hub_size = 0;
362             memcpy(data, qemu_hub_hub_descriptor,
363                    sizeof(qemu_hub_hub_descriptor));
364             data[2] = NUM_PORTS;
365
366             /* fill DeviceRemovable bits */
367             limit = ((NUM_PORTS + 1 + 7) / 8) + 7;
368             for (n = 7; n < limit; n++) {
369                 data[n] = 0x00;
370                 var_hub_size++;
371             }
372
373             /* fill PortPwrCtrlMask bits */
374             limit = limit + ((NUM_PORTS + 7) / 8);
375             for (;n < limit; n++) {
376                 data[n] = 0xff;
377                 var_hub_size++;
378             }
379
380             ret = sizeof(qemu_hub_hub_descriptor) + var_hub_size;
381             data[0] = ret;
382             break;
383         }
384     default:
385     fail:
386         ret = USB_RET_STALL;
387         break;
388     }
389     return ret;
390 }
391
392 static int usb_hub_handle_data(USBDevice *dev, USBPacket *p)
393 {
394     USBHubState *s = (USBHubState *)dev;
395     int ret;
396
397     switch(p->pid) {
398     case USB_TOKEN_IN:
399         if (p->devep == 1) {
400             USBHubPort *port;
401             unsigned int status;
402             uint8_t buf[4];
403             int i, n;
404             n = (NUM_PORTS + 1 + 7) / 8;
405             if (p->iov.size == 1) { /* FreeBSD workaround */
406                 n = 1;
407             } else if (n > p->iov.size) {
408                 return USB_RET_BABBLE;
409             }
410             status = 0;
411             for(i = 0; i < NUM_PORTS; i++) {
412                 port = &s->ports[i];
413                 if (port->wPortChange)
414                     status |= (1 << (i + 1));
415             }
416             if (status != 0) {
417                 for(i = 0; i < n; i++) {
418                     buf[i] = status >> (8 * i);
419                 }
420                 usb_packet_copy(p, buf, n);
421                 ret = n;
422             } else {
423                 ret = USB_RET_NAK; /* usb11 11.13.1 */
424             }
425         } else {
426             goto fail;
427         }
428         break;
429     case USB_TOKEN_OUT:
430     default:
431     fail:
432         ret = USB_RET_STALL;
433         break;
434     }
435     return ret;
436 }
437
438 static int usb_hub_broadcast_packet(USBHubState *s, USBPacket *p)
439 {
440     USBHubPort *port;
441     USBDevice *dev;
442     int i, ret;
443
444     for(i = 0; i < NUM_PORTS; i++) {
445         port = &s->ports[i];
446         dev = port->port.dev;
447         if (dev && dev->attached && (port->wPortStatus & PORT_STAT_ENABLE)) {
448             ret = usb_handle_packet(dev, p);
449             if (ret != USB_RET_NODEV) {
450                 return ret;
451             }
452         }
453     }
454     return USB_RET_NODEV;
455 }
456
457 static int usb_hub_handle_packet(USBDevice *dev, USBPacket *p)
458 {
459     USBHubState *s = (USBHubState *)dev;
460
461 #if defined(DEBUG) && 0
462     printf("usb_hub: pid=0x%x\n", pid);
463 #endif
464     if (dev->state == USB_STATE_DEFAULT &&
465         dev->addr != 0 &&
466         p->devaddr != dev->addr &&
467         (p->pid == USB_TOKEN_SETUP ||
468          p->pid == USB_TOKEN_OUT ||
469          p->pid == USB_TOKEN_IN)) {
470         /* broadcast the packet to the devices */
471         return usb_hub_broadcast_packet(s, p);
472     }
473     return usb_generic_handle_packet(dev, p);
474 }
475
476 static void usb_hub_handle_destroy(USBDevice *dev)
477 {
478     USBHubState *s = (USBHubState *)dev;
479     int i;
480
481     for (i = 0; i < NUM_PORTS; i++) {
482         usb_unregister_port(usb_bus_from_device(dev),
483                             &s->ports[i].port);
484     }
485 }
486
487 static USBPortOps usb_hub_port_ops = {
488     .attach = usb_hub_attach,
489     .detach = usb_hub_detach,
490     .child_detach = usb_hub_child_detach,
491     .wakeup = usb_hub_wakeup,
492     .complete = usb_hub_complete,
493 };
494
495 static int usb_hub_initfn(USBDevice *dev)
496 {
497     USBHubState *s = DO_UPCAST(USBHubState, dev, dev);
498     USBHubPort *port;
499     int i;
500
501     usb_desc_init(dev);
502     for (i = 0; i < NUM_PORTS; i++) {
503         port = &s->ports[i];
504         usb_register_port(usb_bus_from_device(dev),
505                           &port->port, s, i, &usb_hub_port_ops,
506                           USB_SPEED_MASK_LOW | USB_SPEED_MASK_FULL);
507         usb_port_location(&port->port, dev->port, i+1);
508     }
509     usb_hub_handle_reset(dev);
510     return 0;
511 }
512
513 static const VMStateDescription vmstate_usb_hub_port = {
514     .name = "usb-hub-port",
515     .version_id = 1,
516     .minimum_version_id = 1,
517     .fields = (VMStateField []) {
518         VMSTATE_UINT16(wPortStatus, USBHubPort),
519         VMSTATE_UINT16(wPortChange, USBHubPort),
520         VMSTATE_END_OF_LIST()
521     }
522 };
523
524 static const VMStateDescription vmstate_usb_hub = {
525     .name = "usb-hub",
526     .version_id = 1,
527     .minimum_version_id = 1,
528     .fields = (VMStateField []) {
529         VMSTATE_USB_DEVICE(dev, USBHubState),
530         VMSTATE_STRUCT_ARRAY(ports, USBHubState, NUM_PORTS, 0,
531                              vmstate_usb_hub_port, USBHubPort),
532         VMSTATE_END_OF_LIST()
533     }
534 };
535
536 static void usb_hub_class_initfn(ObjectClass *klass, void *data)
537 {
538     DeviceClass *dc = DEVICE_CLASS(klass);
539     USBDeviceClass *uc = USB_DEVICE_CLASS(klass);
540
541     uc->init           = usb_hub_initfn;
542     uc->product_desc   = "QEMU USB Hub";
543     uc->usb_desc       = &desc_hub;
544     uc->handle_packet  = usb_hub_handle_packet;
545     uc->handle_reset   = usb_hub_handle_reset;
546     uc->handle_control = usb_hub_handle_control;
547     uc->handle_data    = usb_hub_handle_data;
548     uc->handle_destroy = usb_hub_handle_destroy;
549     dc->fw_name = "hub";
550     dc->vmsd = &vmstate_usb_hub;
551 }
552
553 static TypeInfo hub_info = {
554     .name          = "usb-hub",
555     .parent        = TYPE_USB_DEVICE,
556     .instance_size = sizeof(USBHubState),
557     .class_init    = usb_hub_class_initfn,
558 };
559
560 static void usb_hub_register_types(void)
561 {
562     type_register_static(&hub_info);
563 }
564
565 type_init(usb_hub_register_types)
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