]> Git Repo - qemu.git/blob - hw/usb-desc.c
usb: add ifnum to USBEndpoint
[qemu.git] / hw / usb-desc.c
1 #include "usb.h"
2 #include "usb-desc.h"
3 #include "trace.h"
4
5 /* ------------------------------------------------------------------ */
6
7 static uint8_t usb_lo(uint16_t val)
8 {
9     return val & 0xff;
10 }
11
12 static uint8_t usb_hi(uint16_t val)
13 {
14     return (val >> 8) & 0xff;
15 }
16
17 int usb_desc_device(const USBDescID *id, const USBDescDevice *dev,
18                     uint8_t *dest, size_t len)
19 {
20     uint8_t bLength = 0x12;
21
22     if (len < bLength) {
23         return -1;
24     }
25
26     dest[0x00] = bLength;
27     dest[0x01] = USB_DT_DEVICE;
28
29     dest[0x02] = usb_lo(dev->bcdUSB);
30     dest[0x03] = usb_hi(dev->bcdUSB);
31     dest[0x04] = dev->bDeviceClass;
32     dest[0x05] = dev->bDeviceSubClass;
33     dest[0x06] = dev->bDeviceProtocol;
34     dest[0x07] = dev->bMaxPacketSize0;
35
36     dest[0x08] = usb_lo(id->idVendor);
37     dest[0x09] = usb_hi(id->idVendor);
38     dest[0x0a] = usb_lo(id->idProduct);
39     dest[0x0b] = usb_hi(id->idProduct);
40     dest[0x0c] = usb_lo(id->bcdDevice);
41     dest[0x0d] = usb_hi(id->bcdDevice);
42     dest[0x0e] = id->iManufacturer;
43     dest[0x0f] = id->iProduct;
44     dest[0x10] = id->iSerialNumber;
45
46     dest[0x11] = dev->bNumConfigurations;
47
48     return bLength;
49 }
50
51 int usb_desc_device_qualifier(const USBDescDevice *dev,
52                               uint8_t *dest, size_t len)
53 {
54     uint8_t bLength = 0x0a;
55
56     if (len < bLength) {
57         return -1;
58     }
59
60     dest[0x00] = bLength;
61     dest[0x01] = USB_DT_DEVICE_QUALIFIER;
62
63     dest[0x02] = usb_lo(dev->bcdUSB);
64     dest[0x03] = usb_hi(dev->bcdUSB);
65     dest[0x04] = dev->bDeviceClass;
66     dest[0x05] = dev->bDeviceSubClass;
67     dest[0x06] = dev->bDeviceProtocol;
68     dest[0x07] = dev->bMaxPacketSize0;
69     dest[0x08] = dev->bNumConfigurations;
70     dest[0x09] = 0; /* reserved */
71
72     return bLength;
73 }
74
75 int usb_desc_config(const USBDescConfig *conf, uint8_t *dest, size_t len)
76 {
77     uint8_t  bLength = 0x09;
78     uint16_t wTotalLength = 0;
79     int i, rc;
80
81     if (len < bLength) {
82         return -1;
83     }
84
85     dest[0x00] = bLength;
86     dest[0x01] = USB_DT_CONFIG;
87     dest[0x04] = conf->bNumInterfaces;
88     dest[0x05] = conf->bConfigurationValue;
89     dest[0x06] = conf->iConfiguration;
90     dest[0x07] = conf->bmAttributes;
91     dest[0x08] = conf->bMaxPower;
92     wTotalLength += bLength;
93
94     /* handle grouped interfaces if any*/
95     for (i = 0; i < conf->nif_groups; i++) {
96         rc = usb_desc_iface_group(&(conf->if_groups[i]),
97                                   dest + wTotalLength,
98                                   len - wTotalLength);
99         if (rc < 0) {
100             return rc;
101         }
102         wTotalLength += rc;
103     }
104
105     /* handle normal (ungrouped / no IAD) interfaces if any */
106     for (i = 0; i < conf->nif; i++) {
107         rc = usb_desc_iface(conf->ifs + i, dest + wTotalLength, len - wTotalLength);
108         if (rc < 0) {
109             return rc;
110         }
111         wTotalLength += rc;
112     }
113
114     dest[0x02] = usb_lo(wTotalLength);
115     dest[0x03] = usb_hi(wTotalLength);
116     return wTotalLength;
117 }
118
119 int usb_desc_iface_group(const USBDescIfaceAssoc *iad, uint8_t *dest,
120                          size_t len)
121 {
122     int pos = 0;
123     int i = 0;
124
125     /* handle interface association descriptor */
126     uint8_t bLength = 0x08;
127
128     if (len < bLength) {
129         return -1;
130     }
131
132     dest[0x00] = bLength;
133     dest[0x01] = USB_DT_INTERFACE_ASSOC;
134     dest[0x02] = iad->bFirstInterface;
135     dest[0x03] = iad->bInterfaceCount;
136     dest[0x04] = iad->bFunctionClass;
137     dest[0x05] = iad->bFunctionSubClass;
138     dest[0x06] = iad->bFunctionProtocol;
139     dest[0x07] = iad->iFunction;
140     pos += bLength;
141
142     /* handle associated interfaces in this group */
143     for (i = 0; i < iad->nif; i++) {
144         int rc = usb_desc_iface(&(iad->ifs[i]), dest + pos, len - pos);
145         if (rc < 0) {
146             return rc;
147         }
148         pos += rc;
149     }
150
151     return pos;
152 }
153
154 int usb_desc_iface(const USBDescIface *iface, uint8_t *dest, size_t len)
155 {
156     uint8_t bLength = 0x09;
157     int i, rc, pos = 0;
158
159     if (len < bLength) {
160         return -1;
161     }
162
163     dest[0x00] = bLength;
164     dest[0x01] = USB_DT_INTERFACE;
165     dest[0x02] = iface->bInterfaceNumber;
166     dest[0x03] = iface->bAlternateSetting;
167     dest[0x04] = iface->bNumEndpoints;
168     dest[0x05] = iface->bInterfaceClass;
169     dest[0x06] = iface->bInterfaceSubClass;
170     dest[0x07] = iface->bInterfaceProtocol;
171     dest[0x08] = iface->iInterface;
172     pos += bLength;
173
174     for (i = 0; i < iface->ndesc; i++) {
175         rc = usb_desc_other(iface->descs + i, dest + pos, len - pos);
176         if (rc < 0) {
177             return rc;
178         }
179         pos += rc;
180     }
181
182     for (i = 0; i < iface->bNumEndpoints; i++) {
183         rc = usb_desc_endpoint(iface->eps + i, dest + pos, len - pos);
184         if (rc < 0) {
185             return rc;
186         }
187         pos += rc;
188     }
189
190     return pos;
191 }
192
193 int usb_desc_endpoint(const USBDescEndpoint *ep, uint8_t *dest, size_t len)
194 {
195     uint8_t bLength = ep->is_audio ? 0x09 : 0x07;
196     uint8_t extralen = ep->extra ? ep->extra[0] : 0;
197
198     if (len < bLength + extralen) {
199         return -1;
200     }
201
202     dest[0x00] = bLength;
203     dest[0x01] = USB_DT_ENDPOINT;
204     dest[0x02] = ep->bEndpointAddress;
205     dest[0x03] = ep->bmAttributes;
206     dest[0x04] = usb_lo(ep->wMaxPacketSize);
207     dest[0x05] = usb_hi(ep->wMaxPacketSize);
208     dest[0x06] = ep->bInterval;
209     if (ep->is_audio) {
210         dest[0x07] = ep->bRefresh;
211         dest[0x08] = ep->bSynchAddress;
212     }
213     if (ep->extra) {
214         memcpy(dest + bLength, ep->extra, extralen);
215     }
216
217     return bLength + extralen;
218 }
219
220 int usb_desc_other(const USBDescOther *desc, uint8_t *dest, size_t len)
221 {
222     int bLength = desc->length ? desc->length : desc->data[0];
223
224     if (len < bLength) {
225         return -1;
226     }
227
228     memcpy(dest, desc->data, bLength);
229     return bLength;
230 }
231
232 /* ------------------------------------------------------------------ */
233
234 static const USBDescIface *usb_desc_find_interface(USBDevice *dev,
235                                                    int nif, int alt)
236 {
237     const USBDescIface *iface;
238     int g, i;
239
240     if (!dev->config) {
241         return NULL;
242     }
243     for (g = 0; g < dev->config->nif_groups; g++) {
244         for (i = 0; i < dev->config->if_groups[g].nif; i++) {
245             iface = &dev->config->if_groups[g].ifs[i];
246             if (iface->bInterfaceNumber == nif &&
247                 iface->bAlternateSetting == alt) {
248                 return iface;
249             }
250         }
251     }
252     for (i = 0; i < dev->config->nif; i++) {
253         iface = &dev->config->ifs[i];
254         if (iface->bInterfaceNumber == nif &&
255             iface->bAlternateSetting == alt) {
256             return iface;
257         }
258     }
259     return NULL;
260 }
261
262 static int usb_desc_set_interface(USBDevice *dev, int index, int value)
263 {
264     const USBDescIface *iface;
265     int old;
266
267     iface = usb_desc_find_interface(dev, index, value);
268     if (iface == NULL) {
269         return -1;
270     }
271
272     old = dev->altsetting[index];
273     dev->altsetting[index] = value;
274     dev->ifaces[index] = iface;
275
276     if (dev->info->set_interface && old != value) {
277         dev->info->set_interface(dev, index, old, value);
278     }
279     return 0;
280 }
281
282 static int usb_desc_set_config(USBDevice *dev, int value)
283 {
284     int i;
285
286     if (value == 0) {
287         dev->configuration = 0;
288         dev->ninterfaces   = 0;
289         dev->config = NULL;
290     } else {
291         for (i = 0; i < dev->device->bNumConfigurations; i++) {
292             if (dev->device->confs[i].bConfigurationValue == value) {
293                 dev->configuration = value;
294                 dev->ninterfaces   = dev->device->confs[i].bNumInterfaces;
295                 dev->config = dev->device->confs + i;
296                 assert(dev->ninterfaces <= USB_MAX_INTERFACES);
297             }
298         }
299         if (i < dev->device->bNumConfigurations) {
300             return -1;
301         }
302     }
303
304     for (i = 0; i < dev->ninterfaces; i++) {
305         usb_desc_set_interface(dev, i, 0);
306     }
307     for (; i < USB_MAX_INTERFACES; i++) {
308         dev->altsetting[i] = 0;
309         dev->ifaces[i] = NULL;
310     }
311
312     return 0;
313 }
314
315 static void usb_desc_setdefaults(USBDevice *dev)
316 {
317     const USBDesc *desc = dev->info->usb_desc;
318
319     assert(desc != NULL);
320     switch (dev->speed) {
321     case USB_SPEED_LOW:
322     case USB_SPEED_FULL:
323         dev->device = desc->full;
324         break;
325     case USB_SPEED_HIGH:
326         dev->device = desc->high;
327         break;
328     }
329     usb_desc_set_config(dev, 0);
330 }
331
332 void usb_desc_init(USBDevice *dev)
333 {
334     const USBDesc *desc = dev->info->usb_desc;
335
336     assert(desc != NULL);
337     dev->speed = USB_SPEED_FULL;
338     dev->speedmask = 0;
339     if (desc->full) {
340         dev->speedmask |= USB_SPEED_MASK_FULL;
341     }
342     if (desc->high) {
343         dev->speedmask |= USB_SPEED_MASK_HIGH;
344     }
345     usb_desc_setdefaults(dev);
346 }
347
348 void usb_desc_attach(USBDevice *dev)
349 {
350     const USBDesc *desc = dev->info->usb_desc;
351
352     assert(desc != NULL);
353     if (desc->high && (dev->port->speedmask & USB_SPEED_MASK_HIGH)) {
354         dev->speed = USB_SPEED_HIGH;
355     } else if (desc->full && (dev->port->speedmask & USB_SPEED_MASK_FULL)) {
356         dev->speed = USB_SPEED_FULL;
357     } else {
358         fprintf(stderr, "usb: port/device speed mismatch for \"%s\"\n",
359                 dev->info->product_desc);
360         return;
361     }
362     usb_desc_setdefaults(dev);
363 }
364
365 void usb_desc_set_string(USBDevice *dev, uint8_t index, const char *str)
366 {
367     USBDescString *s;
368
369     QLIST_FOREACH(s, &dev->strings, next) {
370         if (s->index == index) {
371             break;
372         }
373     }
374     if (s == NULL) {
375         s = g_malloc0(sizeof(*s));
376         s->index = index;
377         QLIST_INSERT_HEAD(&dev->strings, s, next);
378     }
379     g_free(s->str);
380     s->str = g_strdup(str);
381 }
382
383 const char *usb_desc_get_string(USBDevice *dev, uint8_t index)
384 {
385     USBDescString *s;
386
387     QLIST_FOREACH(s, &dev->strings, next) {
388         if (s->index == index) {
389             return s->str;
390         }
391     }
392     return NULL;
393 }
394
395 int usb_desc_string(USBDevice *dev, int index, uint8_t *dest, size_t len)
396 {
397     uint8_t bLength, pos, i;
398     const char *str;
399
400     if (len < 4) {
401         return -1;
402     }
403
404     if (index == 0) {
405         /* language ids */
406         dest[0] = 4;
407         dest[1] = USB_DT_STRING;
408         dest[2] = 0x09;
409         dest[3] = 0x04;
410         return 4;
411     }
412
413     str = usb_desc_get_string(dev, index);
414     if (str == NULL) {
415         str = dev->info->usb_desc->str[index];
416         if (str == NULL) {
417             return 0;
418         }
419     }
420
421     bLength = strlen(str) * 2 + 2;
422     dest[0] = bLength;
423     dest[1] = USB_DT_STRING;
424     i = 0; pos = 2;
425     while (pos+1 < bLength && pos+1 < len) {
426         dest[pos++] = str[i++];
427         dest[pos++] = 0;
428     }
429     return pos;
430 }
431
432 int usb_desc_get_descriptor(USBDevice *dev, int value, uint8_t *dest, size_t len)
433 {
434     const USBDesc *desc = dev->info->usb_desc;
435     const USBDescDevice *other_dev;
436     uint8_t buf[256];
437     uint8_t type = value >> 8;
438     uint8_t index = value & 0xff;
439     int ret = -1;
440
441     if (dev->speed == USB_SPEED_HIGH) {
442         other_dev = dev->info->usb_desc->full;
443     } else {
444         other_dev = dev->info->usb_desc->high;
445     }
446
447     switch(type) {
448     case USB_DT_DEVICE:
449         ret = usb_desc_device(&desc->id, dev->device, buf, sizeof(buf));
450         trace_usb_desc_device(dev->addr, len, ret);
451         break;
452     case USB_DT_CONFIG:
453         if (index < dev->device->bNumConfigurations) {
454             ret = usb_desc_config(dev->device->confs + index, buf, sizeof(buf));
455         }
456         trace_usb_desc_config(dev->addr, index, len, ret);
457         break;
458     case USB_DT_STRING:
459         ret = usb_desc_string(dev, index, buf, sizeof(buf));
460         trace_usb_desc_string(dev->addr, index, len, ret);
461         break;
462
463     case USB_DT_DEVICE_QUALIFIER:
464         if (other_dev != NULL) {
465             ret = usb_desc_device_qualifier(other_dev, buf, sizeof(buf));
466         }
467         trace_usb_desc_device_qualifier(dev->addr, len, ret);
468         break;
469     case USB_DT_OTHER_SPEED_CONFIG:
470         if (other_dev != NULL && index < other_dev->bNumConfigurations) {
471             ret = usb_desc_config(other_dev->confs + index, buf, sizeof(buf));
472             buf[0x01] = USB_DT_OTHER_SPEED_CONFIG;
473         }
474         trace_usb_desc_other_speed_config(dev->addr, index, len, ret);
475         break;
476
477     case USB_DT_DEBUG:
478         /* ignore silently */
479         break;
480
481     default:
482         fprintf(stderr, "%s: %d unknown type %d (len %zd)\n", __FUNCTION__,
483                 dev->addr, type, len);
484         break;
485     }
486
487     if (ret > 0) {
488         if (ret > len) {
489             ret = len;
490         }
491         memcpy(dest, buf, ret);
492     }
493     return ret;
494 }
495
496 int usb_desc_handle_control(USBDevice *dev, USBPacket *p,
497         int request, int value, int index, int length, uint8_t *data)
498 {
499     const USBDesc *desc = dev->info->usb_desc;
500     int ret = -1;
501
502     assert(desc != NULL);
503     switch(request) {
504     case DeviceOutRequest | USB_REQ_SET_ADDRESS:
505         dev->addr = value;
506         trace_usb_set_addr(dev->addr);
507         ret = 0;
508         break;
509
510     case DeviceRequest | USB_REQ_GET_DESCRIPTOR:
511         ret = usb_desc_get_descriptor(dev, value, data, length);
512         break;
513
514     case DeviceRequest | USB_REQ_GET_CONFIGURATION:
515         data[0] = dev->config->bConfigurationValue;
516         ret = 1;
517         break;
518     case DeviceOutRequest | USB_REQ_SET_CONFIGURATION:
519         ret = usb_desc_set_config(dev, value);
520         trace_usb_set_config(dev->addr, value, ret);
521         break;
522
523     case DeviceRequest | USB_REQ_GET_STATUS:
524         data[0] = 0;
525         if (dev->config->bmAttributes & 0x40) {
526             data[0] |= 1 << USB_DEVICE_SELF_POWERED;
527         }
528         if (dev->remote_wakeup) {
529             data[0] |= 1 << USB_DEVICE_REMOTE_WAKEUP;
530         }
531         data[1] = 0x00;
532         ret = 2;
533         break;
534     case DeviceOutRequest | USB_REQ_CLEAR_FEATURE:
535         if (value == USB_DEVICE_REMOTE_WAKEUP) {
536             dev->remote_wakeup = 0;
537             ret = 0;
538         }
539         trace_usb_clear_device_feature(dev->addr, value, ret);
540         break;
541     case DeviceOutRequest | USB_REQ_SET_FEATURE:
542         if (value == USB_DEVICE_REMOTE_WAKEUP) {
543             dev->remote_wakeup = 1;
544             ret = 0;
545         }
546         trace_usb_set_device_feature(dev->addr, value, ret);
547         break;
548
549     case InterfaceRequest | USB_REQ_GET_INTERFACE:
550         if (index < 0 || index >= dev->ninterfaces) {
551             break;
552         }
553         data[0] = dev->altsetting[index];
554         ret = 1;
555         break;
556     case InterfaceOutRequest | USB_REQ_SET_INTERFACE:
557         ret = usb_desc_set_interface(dev, index, value);
558         trace_usb_set_interface(dev->addr, index, value, ret);
559         break;
560
561     }
562     return ret;
563 }
This page took 0.055695 seconds and 4 git commands to generate.