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vga: use constants from vga.h
[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 void usb_desc_ep_init(USBDevice *dev)
235 {
236     const USBDescIface *iface;
237     int i, e, pid, ep;
238
239     usb_ep_init(dev);
240     for (i = 0; i < dev->ninterfaces; i++) {
241         iface = dev->ifaces[i];
242         if (iface == NULL) {
243             continue;
244         }
245         for (e = 0; e < iface->bNumEndpoints; e++) {
246             pid = (iface->eps[e].bEndpointAddress & USB_DIR_IN) ?
247                 USB_TOKEN_IN : USB_TOKEN_OUT;
248             ep = iface->eps[e].bEndpointAddress & 0x0f;
249             usb_ep_set_type(dev, pid, ep, iface->eps[e].bmAttributes & 0x03);
250             usb_ep_set_ifnum(dev, pid, ep, iface->bInterfaceNumber);
251             usb_ep_set_max_packet_size(dev, pid, ep,
252                                        iface->eps[e].wMaxPacketSize);
253         }
254     }
255 }
256
257 static const USBDescIface *usb_desc_find_interface(USBDevice *dev,
258                                                    int nif, int alt)
259 {
260     const USBDescIface *iface;
261     int g, i;
262
263     if (!dev->config) {
264         return NULL;
265     }
266     for (g = 0; g < dev->config->nif_groups; g++) {
267         for (i = 0; i < dev->config->if_groups[g].nif; i++) {
268             iface = &dev->config->if_groups[g].ifs[i];
269             if (iface->bInterfaceNumber == nif &&
270                 iface->bAlternateSetting == alt) {
271                 return iface;
272             }
273         }
274     }
275     for (i = 0; i < dev->config->nif; i++) {
276         iface = &dev->config->ifs[i];
277         if (iface->bInterfaceNumber == nif &&
278             iface->bAlternateSetting == alt) {
279             return iface;
280         }
281     }
282     return NULL;
283 }
284
285 static int usb_desc_set_interface(USBDevice *dev, int index, int value)
286 {
287     const USBDescIface *iface;
288     int old;
289
290     iface = usb_desc_find_interface(dev, index, value);
291     if (iface == NULL) {
292         return -1;
293     }
294
295     old = dev->altsetting[index];
296     dev->altsetting[index] = value;
297     dev->ifaces[index] = iface;
298     usb_desc_ep_init(dev);
299
300     if (old != value) {
301         usb_device_set_interface(dev, index, old, value);
302     }
303     return 0;
304 }
305
306 static int usb_desc_set_config(USBDevice *dev, int value)
307 {
308     int i;
309
310     if (value == 0) {
311         dev->configuration = 0;
312         dev->ninterfaces   = 0;
313         dev->config = NULL;
314     } else {
315         for (i = 0; i < dev->device->bNumConfigurations; i++) {
316             if (dev->device->confs[i].bConfigurationValue == value) {
317                 dev->configuration = value;
318                 dev->ninterfaces   = dev->device->confs[i].bNumInterfaces;
319                 dev->config = dev->device->confs + i;
320                 assert(dev->ninterfaces <= USB_MAX_INTERFACES);
321             }
322         }
323         if (i < dev->device->bNumConfigurations) {
324             return -1;
325         }
326     }
327
328     for (i = 0; i < dev->ninterfaces; i++) {
329         usb_desc_set_interface(dev, i, 0);
330     }
331     for (; i < USB_MAX_INTERFACES; i++) {
332         dev->altsetting[i] = 0;
333         dev->ifaces[i] = NULL;
334     }
335
336     return 0;
337 }
338
339 static void usb_desc_setdefaults(USBDevice *dev)
340 {
341     const USBDesc *desc = usb_device_get_usb_desc(dev);
342
343     assert(desc != NULL);
344     switch (dev->speed) {
345     case USB_SPEED_LOW:
346     case USB_SPEED_FULL:
347         dev->device = desc->full;
348         break;
349     case USB_SPEED_HIGH:
350         dev->device = desc->high;
351         break;
352     }
353     usb_desc_set_config(dev, 0);
354 }
355
356 void usb_desc_init(USBDevice *dev)
357 {
358     const USBDesc *desc = usb_device_get_usb_desc(dev);
359
360     assert(desc != NULL);
361     dev->speed = USB_SPEED_FULL;
362     dev->speedmask = 0;
363     if (desc->full) {
364         dev->speedmask |= USB_SPEED_MASK_FULL;
365     }
366     if (desc->high) {
367         dev->speedmask |= USB_SPEED_MASK_HIGH;
368     }
369     usb_desc_setdefaults(dev);
370 }
371
372 void usb_desc_attach(USBDevice *dev)
373 {
374     const USBDesc *desc = usb_device_get_usb_desc(dev);
375
376     assert(desc != NULL);
377     if (desc->high && (dev->port->speedmask & USB_SPEED_MASK_HIGH)) {
378         dev->speed = USB_SPEED_HIGH;
379     } else if (desc->full && (dev->port->speedmask & USB_SPEED_MASK_FULL)) {
380         dev->speed = USB_SPEED_FULL;
381     } else {
382         fprintf(stderr, "usb: port/device speed mismatch for \"%s\"\n",
383                 usb_device_get_product_desc(dev));
384         return;
385     }
386     usb_desc_setdefaults(dev);
387 }
388
389 void usb_desc_set_string(USBDevice *dev, uint8_t index, const char *str)
390 {
391     USBDescString *s;
392
393     QLIST_FOREACH(s, &dev->strings, next) {
394         if (s->index == index) {
395             break;
396         }
397     }
398     if (s == NULL) {
399         s = g_malloc0(sizeof(*s));
400         s->index = index;
401         QLIST_INSERT_HEAD(&dev->strings, s, next);
402     }
403     g_free(s->str);
404     s->str = g_strdup(str);
405 }
406
407 const char *usb_desc_get_string(USBDevice *dev, uint8_t index)
408 {
409     USBDescString *s;
410
411     QLIST_FOREACH(s, &dev->strings, next) {
412         if (s->index == index) {
413             return s->str;
414         }
415     }
416     return NULL;
417 }
418
419 int usb_desc_string(USBDevice *dev, int index, uint8_t *dest, size_t len)
420 {
421     uint8_t bLength, pos, i;
422     const char *str;
423
424     if (len < 4) {
425         return -1;
426     }
427
428     if (index == 0) {
429         /* language ids */
430         dest[0] = 4;
431         dest[1] = USB_DT_STRING;
432         dest[2] = 0x09;
433         dest[3] = 0x04;
434         return 4;
435     }
436
437     str = usb_desc_get_string(dev, index);
438     if (str == NULL) {
439         str = usb_device_get_usb_desc(dev)->str[index];
440         if (str == NULL) {
441             return 0;
442         }
443     }
444
445     bLength = strlen(str) * 2 + 2;
446     dest[0] = bLength;
447     dest[1] = USB_DT_STRING;
448     i = 0; pos = 2;
449     while (pos+1 < bLength && pos+1 < len) {
450         dest[pos++] = str[i++];
451         dest[pos++] = 0;
452     }
453     return pos;
454 }
455
456 int usb_desc_get_descriptor(USBDevice *dev, int value, uint8_t *dest, size_t len)
457 {
458     const USBDesc *desc = usb_device_get_usb_desc(dev);
459     const USBDescDevice *other_dev;
460     uint8_t buf[256];
461     uint8_t type = value >> 8;
462     uint8_t index = value & 0xff;
463     int ret = -1;
464
465     if (dev->speed == USB_SPEED_HIGH) {
466         other_dev = usb_device_get_usb_desc(dev)->full;
467     } else {
468         other_dev = usb_device_get_usb_desc(dev)->high;
469     }
470
471     switch(type) {
472     case USB_DT_DEVICE:
473         ret = usb_desc_device(&desc->id, dev->device, buf, sizeof(buf));
474         trace_usb_desc_device(dev->addr, len, ret);
475         break;
476     case USB_DT_CONFIG:
477         if (index < dev->device->bNumConfigurations) {
478             ret = usb_desc_config(dev->device->confs + index, buf, sizeof(buf));
479         }
480         trace_usb_desc_config(dev->addr, index, len, ret);
481         break;
482     case USB_DT_STRING:
483         ret = usb_desc_string(dev, index, buf, sizeof(buf));
484         trace_usb_desc_string(dev->addr, index, len, ret);
485         break;
486
487     case USB_DT_DEVICE_QUALIFIER:
488         if (other_dev != NULL) {
489             ret = usb_desc_device_qualifier(other_dev, buf, sizeof(buf));
490         }
491         trace_usb_desc_device_qualifier(dev->addr, len, ret);
492         break;
493     case USB_DT_OTHER_SPEED_CONFIG:
494         if (other_dev != NULL && index < other_dev->bNumConfigurations) {
495             ret = usb_desc_config(other_dev->confs + index, buf, sizeof(buf));
496             buf[0x01] = USB_DT_OTHER_SPEED_CONFIG;
497         }
498         trace_usb_desc_other_speed_config(dev->addr, index, len, ret);
499         break;
500
501     case USB_DT_DEBUG:
502         /* ignore silently */
503         break;
504
505     default:
506         fprintf(stderr, "%s: %d unknown type %d (len %zd)\n", __FUNCTION__,
507                 dev->addr, type, len);
508         break;
509     }
510
511     if (ret > 0) {
512         if (ret > len) {
513             ret = len;
514         }
515         memcpy(dest, buf, ret);
516     }
517     return ret;
518 }
519
520 int usb_desc_handle_control(USBDevice *dev, USBPacket *p,
521         int request, int value, int index, int length, uint8_t *data)
522 {
523     const USBDesc *desc = usb_device_get_usb_desc(dev);
524     int ret = -1;
525
526     assert(desc != NULL);
527     switch(request) {
528     case DeviceOutRequest | USB_REQ_SET_ADDRESS:
529         dev->addr = value;
530         trace_usb_set_addr(dev->addr);
531         ret = 0;
532         break;
533
534     case DeviceRequest | USB_REQ_GET_DESCRIPTOR:
535         ret = usb_desc_get_descriptor(dev, value, data, length);
536         break;
537
538     case DeviceRequest | USB_REQ_GET_CONFIGURATION:
539         data[0] = dev->config->bConfigurationValue;
540         ret = 1;
541         break;
542     case DeviceOutRequest | USB_REQ_SET_CONFIGURATION:
543         ret = usb_desc_set_config(dev, value);
544         trace_usb_set_config(dev->addr, value, ret);
545         break;
546
547     case DeviceRequest | USB_REQ_GET_STATUS:
548         data[0] = 0;
549         if (dev->config->bmAttributes & 0x40) {
550             data[0] |= 1 << USB_DEVICE_SELF_POWERED;
551         }
552         if (dev->remote_wakeup) {
553             data[0] |= 1 << USB_DEVICE_REMOTE_WAKEUP;
554         }
555         data[1] = 0x00;
556         ret = 2;
557         break;
558     case DeviceOutRequest | USB_REQ_CLEAR_FEATURE:
559         if (value == USB_DEVICE_REMOTE_WAKEUP) {
560             dev->remote_wakeup = 0;
561             ret = 0;
562         }
563         trace_usb_clear_device_feature(dev->addr, value, ret);
564         break;
565     case DeviceOutRequest | USB_REQ_SET_FEATURE:
566         if (value == USB_DEVICE_REMOTE_WAKEUP) {
567             dev->remote_wakeup = 1;
568             ret = 0;
569         }
570         trace_usb_set_device_feature(dev->addr, value, ret);
571         break;
572
573     case InterfaceRequest | USB_REQ_GET_INTERFACE:
574         if (index < 0 || index >= dev->ninterfaces) {
575             break;
576         }
577         data[0] = dev->altsetting[index];
578         ret = 1;
579         break;
580     case InterfaceOutRequest | USB_REQ_SET_INTERFACE:
581         ret = usb_desc_set_interface(dev, index, value);
582         trace_usb_set_interface(dev->addr, index, value, ret);
583         break;
584
585     }
586     return ret;
587 }
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