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10#include <linux/kallsyms.h>
11#include <linux/kernel.h>
12#include <linux/slab.h>
13#include <linux/module.h>
14#include <linux/device.h>
15#include <linux/utsname.h>
16
17#include <linux/usb/composite.h>
18#include <linux/usb/otg.h>
19#include <asm/unaligned.h>
20
21#include "u_os_desc.h"
22
23
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29
30
31struct usb_os_string {
32 __u8 bLength;
33 __u8 bDescriptorType;
34 __u8 qwSignature[OS_STRING_QW_SIGN_LEN];
35 __u8 bMS_VendorCode;
36 __u8 bPad;
37} __packed;
38
39
40
41
42
43
44
45
46static struct usb_gadget_strings **get_containers_gs(
47 struct usb_gadget_string_container *uc)
48{
49 return (struct usb_gadget_strings **)uc->stash;
50}
51
52
53
54
55
56
57
58
59static struct usb_descriptor_header **
60function_descriptors(struct usb_function *f,
61 enum usb_device_speed speed)
62{
63 struct usb_descriptor_header **descriptors;
64
65
66
67
68
69
70 switch (speed) {
71 case USB_SPEED_SUPER_PLUS:
72 descriptors = f->ssp_descriptors;
73 if (descriptors)
74 break;
75
76 case USB_SPEED_SUPER:
77 descriptors = f->ss_descriptors;
78 if (descriptors)
79 break;
80
81 case USB_SPEED_HIGH:
82 descriptors = f->hs_descriptors;
83 if (descriptors)
84 break;
85
86 default:
87 descriptors = f->fs_descriptors;
88 }
89
90
91
92
93
94
95 return descriptors;
96}
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105
106
107static struct usb_descriptor_header**
108next_ep_desc(struct usb_descriptor_header **t)
109{
110 for (; *t; t++) {
111 if ((*t)->bDescriptorType == USB_DT_ENDPOINT)
112 return t;
113 }
114 return NULL;
115}
116
117
118
119
120
121
122
123#define for_each_ep_desc(start, ep_desc) \
124 for (ep_desc = next_ep_desc(start); \
125 ep_desc; ep_desc = next_ep_desc(ep_desc+1))
126
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144
145int config_ep_by_speed(struct usb_gadget *g,
146 struct usb_function *f,
147 struct usb_ep *_ep)
148{
149 struct usb_endpoint_descriptor *chosen_desc = NULL;
150 struct usb_descriptor_header **speed_desc = NULL;
151
152 struct usb_ss_ep_comp_descriptor *comp_desc = NULL;
153 int want_comp_desc = 0;
154
155 struct usb_descriptor_header **d_spd;
156
157 if (!g || !f || !_ep)
158 return -EIO;
159
160
161 switch (g->speed) {
162 case USB_SPEED_SUPER_PLUS:
163 if (gadget_is_superspeed_plus(g)) {
164 speed_desc = f->ssp_descriptors;
165 want_comp_desc = 1;
166 break;
167 }
168
169 case USB_SPEED_SUPER:
170 if (gadget_is_superspeed(g)) {
171 speed_desc = f->ss_descriptors;
172 want_comp_desc = 1;
173 break;
174 }
175
176 case USB_SPEED_HIGH:
177 if (gadget_is_dualspeed(g)) {
178 speed_desc = f->hs_descriptors;
179 break;
180 }
181
182 default:
183 speed_desc = f->fs_descriptors;
184 }
185
186 for_each_ep_desc(speed_desc, d_spd) {
187 chosen_desc = (struct usb_endpoint_descriptor *)*d_spd;
188 if (chosen_desc->bEndpointAddress == _ep->address)
189 goto ep_found;
190 }
191 return -EIO;
192
193ep_found:
194
195 _ep->maxpacket = usb_endpoint_maxp(chosen_desc);
196 _ep->desc = chosen_desc;
197 _ep->comp_desc = NULL;
198 _ep->maxburst = 0;
199 _ep->mult = 1;
200
201 if (g->speed == USB_SPEED_HIGH && (usb_endpoint_xfer_isoc(_ep->desc) ||
202 usb_endpoint_xfer_int(_ep->desc)))
203 _ep->mult = usb_endpoint_maxp_mult(_ep->desc);
204
205 if (!want_comp_desc)
206 return 0;
207
208
209
210
211
212 comp_desc = (struct usb_ss_ep_comp_descriptor *)*(++d_spd);
213 if (!comp_desc ||
214 (comp_desc->bDescriptorType != USB_DT_SS_ENDPOINT_COMP))
215 return -EIO;
216 _ep->comp_desc = comp_desc;
217 if (g->speed >= USB_SPEED_SUPER) {
218 switch (usb_endpoint_type(_ep->desc)) {
219 case USB_ENDPOINT_XFER_ISOC:
220
221 _ep->mult = (comp_desc->bmAttributes & 0x3) + 1;
222
223 case USB_ENDPOINT_XFER_BULK:
224 case USB_ENDPOINT_XFER_INT:
225 _ep->maxburst = comp_desc->bMaxBurst + 1;
226 break;
227 default:
228 if (comp_desc->bMaxBurst != 0) {
229 struct usb_composite_dev *cdev;
230
231 cdev = get_gadget_data(g);
232 ERROR(cdev, "ep0 bMaxBurst must be 0\n");
233 }
234 _ep->maxburst = 1;
235 break;
236 }
237 }
238 return 0;
239}
240EXPORT_SYMBOL_GPL(config_ep_by_speed);
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255
256int usb_add_function(struct usb_configuration *config,
257 struct usb_function *function)
258{
259 int value = -EINVAL;
260
261 DBG(config->cdev, "adding '%s'/%p to config '%s'/%p\n",
262 function->name, function,
263 config->label, config);
264
265 if (!function->set_alt || !function->disable)
266 goto done;
267
268 function->config = config;
269 list_add_tail(&function->list, &config->functions);
270
271 if (function->bind_deactivated) {
272 value = usb_function_deactivate(function);
273 if (value)
274 goto done;
275 }
276
277
278 if (function->bind) {
279 value = function->bind(config, function);
280 if (value < 0) {
281 list_del(&function->list);
282 function->config = NULL;
283 }
284 } else
285 value = 0;
286
287
288
289
290
291
292 if (!config->fullspeed && function->fs_descriptors)
293 config->fullspeed = true;
294 if (!config->highspeed && function->hs_descriptors)
295 config->highspeed = true;
296 if (!config->superspeed && function->ss_descriptors)
297 config->superspeed = true;
298 if (!config->superspeed_plus && function->ssp_descriptors)
299 config->superspeed_plus = true;
300
301done:
302 if (value)
303 DBG(config->cdev, "adding '%s'/%p --> %d\n",
304 function->name, function, value);
305 return value;
306}
307EXPORT_SYMBOL_GPL(usb_add_function);
308
309void usb_remove_function(struct usb_configuration *c, struct usb_function *f)
310{
311 if (f->disable)
312 f->disable(f);
313
314 bitmap_zero(f->endpoints, 32);
315 list_del(&f->list);
316 if (f->unbind)
317 f->unbind(c, f);
318
319 if (f->bind_deactivated)
320 usb_function_activate(f);
321}
322EXPORT_SYMBOL_GPL(usb_remove_function);
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342
343int usb_function_deactivate(struct usb_function *function)
344{
345 struct usb_composite_dev *cdev = function->config->cdev;
346 unsigned long flags;
347 int status = 0;
348
349 spin_lock_irqsave(&cdev->lock, flags);
350
351 if (cdev->deactivations == 0)
352 status = usb_gadget_deactivate(cdev->gadget);
353 if (status == 0)
354 cdev->deactivations++;
355
356 spin_unlock_irqrestore(&cdev->lock, flags);
357 return status;
358}
359EXPORT_SYMBOL_GPL(usb_function_deactivate);
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370
371int usb_function_activate(struct usb_function *function)
372{
373 struct usb_composite_dev *cdev = function->config->cdev;
374 unsigned long flags;
375 int status = 0;
376
377 spin_lock_irqsave(&cdev->lock, flags);
378
379 if (WARN_ON(cdev->deactivations == 0))
380 status = -EINVAL;
381 else {
382 cdev->deactivations--;
383 if (cdev->deactivations == 0)
384 status = usb_gadget_activate(cdev->gadget);
385 }
386
387 spin_unlock_irqrestore(&cdev->lock, flags);
388 return status;
389}
390EXPORT_SYMBOL_GPL(usb_function_activate);
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415int usb_interface_id(struct usb_configuration *config,
416 struct usb_function *function)
417{
418 unsigned id = config->next_interface_id;
419
420 if (id < MAX_CONFIG_INTERFACES) {
421 config->interface[id] = function;
422 config->next_interface_id = id + 1;
423 return id;
424 }
425 return -ENODEV;
426}
427EXPORT_SYMBOL_GPL(usb_interface_id);
428
429static u8 encode_bMaxPower(enum usb_device_speed speed,
430 struct usb_configuration *c)
431{
432 unsigned val;
433
434 if (c->MaxPower)
435 val = c->MaxPower;
436 else
437 val = CONFIG_USB_GADGET_VBUS_DRAW;
438 if (!val)
439 return 0;
440 switch (speed) {
441 case USB_SPEED_SUPER:
442 return DIV_ROUND_UP(val, 8);
443 default:
444 return DIV_ROUND_UP(val, 2);
445 }
446}
447
448static int config_buf(struct usb_configuration *config,
449 enum usb_device_speed speed, void *buf, u8 type)
450{
451 struct usb_config_descriptor *c = buf;
452 void *next = buf + USB_DT_CONFIG_SIZE;
453 int len;
454 struct usb_function *f;
455 int status;
456
457 len = USB_COMP_EP0_BUFSIZ - USB_DT_CONFIG_SIZE;
458
459 c = buf;
460 c->bLength = USB_DT_CONFIG_SIZE;
461 c->bDescriptorType = type;
462
463 c->bNumInterfaces = config->next_interface_id;
464 c->bConfigurationValue = config->bConfigurationValue;
465 c->iConfiguration = config->iConfiguration;
466 c->bmAttributes = USB_CONFIG_ATT_ONE | config->bmAttributes;
467 c->bMaxPower = encode_bMaxPower(speed, config);
468
469
470 if (config->descriptors) {
471 status = usb_descriptor_fillbuf(next, len,
472 config->descriptors);
473 if (status < 0)
474 return status;
475 len -= status;
476 next += status;
477 }
478
479
480 list_for_each_entry(f, &config->functions, list) {
481 struct usb_descriptor_header **descriptors;
482
483 descriptors = function_descriptors(f, speed);
484 if (!descriptors)
485 continue;
486 status = usb_descriptor_fillbuf(next, len,
487 (const struct usb_descriptor_header **) descriptors);
488 if (status < 0)
489 return status;
490 len -= status;
491 next += status;
492 }
493
494 len = next - buf;
495 c->wTotalLength = cpu_to_le16(len);
496 return len;
497}
498
499static int config_desc(struct usb_composite_dev *cdev, unsigned w_value)
500{
501 struct usb_gadget *gadget = cdev->gadget;
502 struct usb_configuration *c;
503 struct list_head *pos;
504 u8 type = w_value >> 8;
505 enum usb_device_speed speed = USB_SPEED_UNKNOWN;
506
507 if (gadget->speed >= USB_SPEED_SUPER)
508 speed = gadget->speed;
509 else if (gadget_is_dualspeed(gadget)) {
510 int hs = 0;
511 if (gadget->speed == USB_SPEED_HIGH)
512 hs = 1;
513 if (type == USB_DT_OTHER_SPEED_CONFIG)
514 hs = !hs;
515 if (hs)
516 speed = USB_SPEED_HIGH;
517
518 }
519
520
521 w_value &= 0xff;
522
523 pos = &cdev->configs;
524 c = cdev->os_desc_config;
525 if (c)
526 goto check_config;
527
528 while ((pos = pos->next) != &cdev->configs) {
529 c = list_entry(pos, typeof(*c), list);
530
531
532 if (c == cdev->os_desc_config)
533 continue;
534
535check_config:
536
537 switch (speed) {
538 case USB_SPEED_SUPER_PLUS:
539 if (!c->superspeed_plus)
540 continue;
541 break;
542 case USB_SPEED_SUPER:
543 if (!c->superspeed)
544 continue;
545 break;
546 case USB_SPEED_HIGH:
547 if (!c->highspeed)
548 continue;
549 break;
550 default:
551 if (!c->fullspeed)
552 continue;
553 }
554
555 if (w_value == 0)
556 return config_buf(c, speed, cdev->req->buf, type);
557 w_value--;
558 }
559 return -EINVAL;
560}
561
562static int count_configs(struct usb_composite_dev *cdev, unsigned type)
563{
564 struct usb_gadget *gadget = cdev->gadget;
565 struct usb_configuration *c;
566 unsigned count = 0;
567 int hs = 0;
568 int ss = 0;
569 int ssp = 0;
570
571 if (gadget_is_dualspeed(gadget)) {
572 if (gadget->speed == USB_SPEED_HIGH)
573 hs = 1;
574 if (gadget->speed == USB_SPEED_SUPER)
575 ss = 1;
576 if (gadget->speed == USB_SPEED_SUPER_PLUS)
577 ssp = 1;
578 if (type == USB_DT_DEVICE_QUALIFIER)
579 hs = !hs;
580 }
581 list_for_each_entry(c, &cdev->configs, list) {
582
583 if (ssp) {
584 if (!c->superspeed_plus)
585 continue;
586 } else if (ss) {
587 if (!c->superspeed)
588 continue;
589 } else if (hs) {
590 if (!c->highspeed)
591 continue;
592 } else {
593 if (!c->fullspeed)
594 continue;
595 }
596 count++;
597 }
598 return count;
599}
600
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609
610static int bos_desc(struct usb_composite_dev *cdev)
611{
612 struct usb_ext_cap_descriptor *usb_ext;
613 struct usb_dcd_config_params dcd_config_params;
614 struct usb_bos_descriptor *bos = cdev->req->buf;
615
616 bos->bLength = USB_DT_BOS_SIZE;
617 bos->bDescriptorType = USB_DT_BOS;
618
619 bos->wTotalLength = cpu_to_le16(USB_DT_BOS_SIZE);
620 bos->bNumDeviceCaps = 0;
621
622
623
624
625
626 usb_ext = cdev->req->buf + le16_to_cpu(bos->wTotalLength);
627 bos->bNumDeviceCaps++;
628 le16_add_cpu(&bos->wTotalLength, USB_DT_USB_EXT_CAP_SIZE);
629 usb_ext->bLength = USB_DT_USB_EXT_CAP_SIZE;
630 usb_ext->bDescriptorType = USB_DT_DEVICE_CAPABILITY;
631 usb_ext->bDevCapabilityType = USB_CAP_TYPE_EXT;
632 usb_ext->bmAttributes = cpu_to_le32(USB_LPM_SUPPORT | USB_BESL_SUPPORT);
633
634
635
636
637
638 if (gadget_is_superspeed(cdev->gadget)) {
639 struct usb_ss_cap_descriptor *ss_cap;
640
641 ss_cap = cdev->req->buf + le16_to_cpu(bos->wTotalLength);
642 bos->bNumDeviceCaps++;
643 le16_add_cpu(&bos->wTotalLength, USB_DT_USB_SS_CAP_SIZE);
644 ss_cap->bLength = USB_DT_USB_SS_CAP_SIZE;
645 ss_cap->bDescriptorType = USB_DT_DEVICE_CAPABILITY;
646 ss_cap->bDevCapabilityType = USB_SS_CAP_TYPE;
647 ss_cap->bmAttributes = 0;
648 ss_cap->wSpeedSupported = cpu_to_le16(USB_LOW_SPEED_OPERATION |
649 USB_FULL_SPEED_OPERATION |
650 USB_HIGH_SPEED_OPERATION |
651 USB_5GBPS_OPERATION);
652 ss_cap->bFunctionalitySupport = USB_LOW_SPEED_OPERATION;
653
654
655 if (cdev->gadget->ops->get_config_params) {
656 cdev->gadget->ops->get_config_params(cdev->gadget,
657 &dcd_config_params);
658 } else {
659 dcd_config_params.bU1devExitLat =
660 USB_DEFAULT_U1_DEV_EXIT_LAT;
661 dcd_config_params.bU2DevExitLat =
662 cpu_to_le16(USB_DEFAULT_U2_DEV_EXIT_LAT);
663 }
664 ss_cap->bU1devExitLat = dcd_config_params.bU1devExitLat;
665 ss_cap->bU2DevExitLat = dcd_config_params.bU2DevExitLat;
666 }
667
668
669 if (gadget_is_superspeed_plus(cdev->gadget)) {
670 struct usb_ssp_cap_descriptor *ssp_cap;
671
672 ssp_cap = cdev->req->buf + le16_to_cpu(bos->wTotalLength);
673 bos->bNumDeviceCaps++;
674
675
676
677
678
679 le16_add_cpu(&bos->wTotalLength, USB_DT_USB_SSP_CAP_SIZE(1));
680 ssp_cap->bLength = USB_DT_USB_SSP_CAP_SIZE(1);
681 ssp_cap->bDescriptorType = USB_DT_DEVICE_CAPABILITY;
682 ssp_cap->bDevCapabilityType = USB_SSP_CAP_TYPE;
683 ssp_cap->bReserved = 0;
684 ssp_cap->wReserved = 0;
685
686
687 ssp_cap->bmAttributes = cpu_to_le32(1);
688
689
690 ssp_cap->wFunctionalitySupport =
691 cpu_to_le16((1 << 8) | (1 << 12));
692
693
694
695
696
697
698
699
700 ssp_cap->bmSublinkSpeedAttr[0] =
701 cpu_to_le32((3 << 4) | (1 << 14) | (0xa << 16));
702
703
704
705
706
707
708
709 ssp_cap->bmSublinkSpeedAttr[1] =
710 cpu_to_le32((3 << 4) | (1 << 14) |
711 (0xa << 16) | (1 << 7));
712 }
713
714 return le16_to_cpu(bos->wTotalLength);
715}
716
717static void device_qual(struct usb_composite_dev *cdev)
718{
719 struct usb_qualifier_descriptor *qual = cdev->req->buf;
720
721 qual->bLength = sizeof(*qual);
722 qual->bDescriptorType = USB_DT_DEVICE_QUALIFIER;
723
724 qual->bcdUSB = cdev->desc.bcdUSB;
725 qual->bDeviceClass = cdev->desc.bDeviceClass;
726 qual->bDeviceSubClass = cdev->desc.bDeviceSubClass;
727 qual->bDeviceProtocol = cdev->desc.bDeviceProtocol;
728
729 qual->bMaxPacketSize0 = cdev->gadget->ep0->maxpacket;
730 qual->bNumConfigurations = count_configs(cdev, USB_DT_DEVICE_QUALIFIER);
731 qual->bRESERVED = 0;
732}
733
734
735
736static void reset_config(struct usb_composite_dev *cdev)
737{
738 struct usb_function *f;
739
740 DBG(cdev, "reset config\n");
741
742 list_for_each_entry(f, &cdev->config->functions, list) {
743 if (f->disable)
744 f->disable(f);
745
746 bitmap_zero(f->endpoints, 32);
747 }
748 cdev->config = NULL;
749 cdev->delayed_status = 0;
750}
751
752static int set_config(struct usb_composite_dev *cdev,
753 const struct usb_ctrlrequest *ctrl, unsigned number)
754{
755 struct usb_gadget *gadget = cdev->gadget;
756 struct usb_configuration *c = NULL;
757 int result = -EINVAL;
758 unsigned power = gadget_is_otg(gadget) ? 8 : 100;
759 int tmp;
760
761 if (number) {
762 list_for_each_entry(c, &cdev->configs, list) {
763 if (c->bConfigurationValue == number) {
764
765
766
767
768
769 if (cdev->config)
770 reset_config(cdev);
771 result = 0;
772 break;
773 }
774 }
775 if (result < 0)
776 goto done;
777 } else {
778 if (cdev->config)
779 reset_config(cdev);
780 result = 0;
781 }
782
783 INFO(cdev, "%s config #%d: %s\n",
784 usb_speed_string(gadget->speed),
785 number, c ? c->label : "unconfigured");
786
787 if (!c)
788 goto done;
789
790 usb_gadget_set_state(gadget, USB_STATE_CONFIGURED);
791 cdev->config = c;
792
793
794 for (tmp = 0; tmp < MAX_CONFIG_INTERFACES; tmp++) {
795 struct usb_function *f = c->interface[tmp];
796 struct usb_descriptor_header **descriptors;
797
798 if (!f)
799 break;
800
801
802
803
804
805
806
807 descriptors = function_descriptors(f, gadget->speed);
808
809 for (; *descriptors; ++descriptors) {
810 struct usb_endpoint_descriptor *ep;
811 int addr;
812
813 if ((*descriptors)->bDescriptorType != USB_DT_ENDPOINT)
814 continue;
815
816 ep = (struct usb_endpoint_descriptor *)*descriptors;
817 addr = ((ep->bEndpointAddress & 0x80) >> 3)
818 | (ep->bEndpointAddress & 0x0f);
819 set_bit(addr, f->endpoints);
820 }
821
822 result = f->set_alt(f, tmp, 0);
823 if (result < 0) {
824 DBG(cdev, "interface %d (%s/%p) alt 0 --> %d\n",
825 tmp, f->name, f, result);
826
827 reset_config(cdev);
828 goto done;
829 }
830
831 if (result == USB_GADGET_DELAYED_STATUS) {
832 DBG(cdev,
833 "%s: interface %d (%s) requested delayed status\n",
834 __func__, tmp, f->name);
835 cdev->delayed_status++;
836 DBG(cdev, "delayed_status count %d\n",
837 cdev->delayed_status);
838 }
839 }
840
841
842 power = c->MaxPower ? c->MaxPower : CONFIG_USB_GADGET_VBUS_DRAW;
843done:
844 usb_gadget_vbus_draw(gadget, power);
845 if (result >= 0 && cdev->delayed_status)
846 result = USB_GADGET_DELAYED_STATUS;
847 return result;
848}
849
850int usb_add_config_only(struct usb_composite_dev *cdev,
851 struct usb_configuration *config)
852{
853 struct usb_configuration *c;
854
855 if (!config->bConfigurationValue)
856 return -EINVAL;
857
858
859 list_for_each_entry(c, &cdev->configs, list) {
860 if (c->bConfigurationValue == config->bConfigurationValue)
861 return -EBUSY;
862 }
863
864 config->cdev = cdev;
865 list_add_tail(&config->list, &cdev->configs);
866
867 INIT_LIST_HEAD(&config->functions);
868 config->next_interface_id = 0;
869 memset(config->interface, 0, sizeof(config->interface));
870
871 return 0;
872}
873EXPORT_SYMBOL_GPL(usb_add_config_only);
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889
890int usb_add_config(struct usb_composite_dev *cdev,
891 struct usb_configuration *config,
892 int (*bind)(struct usb_configuration *))
893{
894 int status = -EINVAL;
895
896 if (!bind)
897 goto done;
898
899 DBG(cdev, "adding config #%u '%s'/%p\n",
900 config->bConfigurationValue,
901 config->label, config);
902
903 status = usb_add_config_only(cdev, config);
904 if (status)
905 goto done;
906
907 status = bind(config);
908 if (status < 0) {
909 while (!list_empty(&config->functions)) {
910 struct usb_function *f;
911
912 f = list_first_entry(&config->functions,
913 struct usb_function, list);
914 list_del(&f->list);
915 if (f->unbind) {
916 DBG(cdev, "unbind function '%s'/%p\n",
917 f->name, f);
918 f->unbind(config, f);
919
920 }
921 }
922 list_del(&config->list);
923 config->cdev = NULL;
924 } else {
925 unsigned i;
926
927 DBG(cdev, "cfg %d/%p speeds:%s%s%s%s\n",
928 config->bConfigurationValue, config,
929 config->superspeed_plus ? " superplus" : "",
930 config->superspeed ? " super" : "",
931 config->highspeed ? " high" : "",
932 config->fullspeed
933 ? (gadget_is_dualspeed(cdev->gadget)
934 ? " full"
935 : " full/low")
936 : "");
937
938 for (i = 0; i < MAX_CONFIG_INTERFACES; i++) {
939 struct usb_function *f = config->interface[i];
940
941 if (!f)
942 continue;
943 DBG(cdev, " interface %d = %s/%p\n",
944 i, f->name, f);
945 }
946 }
947
948
949 usb_ep_autoconfig_reset(cdev->gadget);
950
951done:
952 if (status)
953 DBG(cdev, "added config '%s'/%u --> %d\n", config->label,
954 config->bConfigurationValue, status);
955 return status;
956}
957EXPORT_SYMBOL_GPL(usb_add_config);
958
959static void remove_config(struct usb_composite_dev *cdev,
960 struct usb_configuration *config)
961{
962 while (!list_empty(&config->functions)) {
963 struct usb_function *f;
964
965 f = list_first_entry(&config->functions,
966 struct usb_function, list);
967
968 usb_remove_function(config, f);
969 }
970 list_del(&config->list);
971 if (config->unbind) {
972 DBG(cdev, "unbind config '%s'/%p\n", config->label, config);
973 config->unbind(config);
974
975 }
976}
977
978
979
980
981
982
983
984
985
986
987void usb_remove_config(struct usb_composite_dev *cdev,
988 struct usb_configuration *config)
989{
990 unsigned long flags;
991
992 spin_lock_irqsave(&cdev->lock, flags);
993
994 if (cdev->config == config)
995 reset_config(cdev);
996
997 spin_unlock_irqrestore(&cdev->lock, flags);
998
999 remove_config(cdev, config);
1000}
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010static void collect_langs(struct usb_gadget_strings **sp, __le16 *buf)
1011{
1012 const struct usb_gadget_strings *s;
1013 __le16 language;
1014 __le16 *tmp;
1015
1016 while (*sp) {
1017 s = *sp;
1018 language = cpu_to_le16(s->language);
1019 for (tmp = buf; *tmp && tmp < &buf[126]; tmp++) {
1020 if (*tmp == language)
1021 goto repeat;
1022 }
1023 *tmp++ = language;
1024repeat:
1025 sp++;
1026 }
1027}
1028
1029static int lookup_string(
1030 struct usb_gadget_strings **sp,
1031 void *buf,
1032 u16 language,
1033 int id
1034)
1035{
1036 struct usb_gadget_strings *s;
1037 int value;
1038
1039 while (*sp) {
1040 s = *sp++;
1041 if (s->language != language)
1042 continue;
1043 value = usb_gadget_get_string(s, id, buf);
1044 if (value > 0)
1045 return value;
1046 }
1047 return -EINVAL;
1048}
1049
1050static int get_string(struct usb_composite_dev *cdev,
1051 void *buf, u16 language, int id)
1052{
1053 struct usb_composite_driver *composite = cdev->driver;
1054 struct usb_gadget_string_container *uc;
1055 struct usb_configuration *c;
1056 struct usb_function *f;
1057 int len;
1058
1059
1060
1061
1062
1063
1064
1065 if (id == 0) {
1066 struct usb_string_descriptor *s = buf;
1067 struct usb_gadget_strings **sp;
1068
1069 memset(s, 0, 256);
1070 s->bDescriptorType = USB_DT_STRING;
1071
1072 sp = composite->strings;
1073 if (sp)
1074 collect_langs(sp, s->wData);
1075
1076 list_for_each_entry(c, &cdev->configs, list) {
1077 sp = c->strings;
1078 if (sp)
1079 collect_langs(sp, s->wData);
1080
1081 list_for_each_entry(f, &c->functions, list) {
1082 sp = f->strings;
1083 if (sp)
1084 collect_langs(sp, s->wData);
1085 }
1086 }
1087 list_for_each_entry(uc, &cdev->gstrings, list) {
1088 struct usb_gadget_strings **sp;
1089
1090 sp = get_containers_gs(uc);
1091 collect_langs(sp, s->wData);
1092 }
1093
1094 for (len = 0; len <= 126 && s->wData[len]; len++)
1095 continue;
1096 if (!len)
1097 return -EINVAL;
1098
1099 s->bLength = 2 * (len + 1);
1100 return s->bLength;
1101 }
1102
1103 if (cdev->use_os_string && language == 0 && id == OS_STRING_IDX) {
1104 struct usb_os_string *b = buf;
1105 b->bLength = sizeof(*b);
1106 b->bDescriptorType = USB_DT_STRING;
1107 compiletime_assert(
1108 sizeof(b->qwSignature) == sizeof(cdev->qw_sign),
1109 "qwSignature size must be equal to qw_sign");
1110 memcpy(&b->qwSignature, cdev->qw_sign, sizeof(b->qwSignature));
1111 b->bMS_VendorCode = cdev->b_vendor_code;
1112 b->bPad = 0;
1113 return sizeof(*b);
1114 }
1115
1116 list_for_each_entry(uc, &cdev->gstrings, list) {
1117 struct usb_gadget_strings **sp;
1118
1119 sp = get_containers_gs(uc);
1120 len = lookup_string(sp, buf, language, id);
1121 if (len > 0)
1122 return len;
1123 }
1124
1125
1126
1127
1128
1129 if (composite->strings) {
1130 len = lookup_string(composite->strings, buf, language, id);
1131 if (len > 0)
1132 return len;
1133 }
1134 list_for_each_entry(c, &cdev->configs, list) {
1135 if (c->strings) {
1136 len = lookup_string(c->strings, buf, language, id);
1137 if (len > 0)
1138 return len;
1139 }
1140 list_for_each_entry(f, &c->functions, list) {
1141 if (!f->strings)
1142 continue;
1143 len = lookup_string(f->strings, buf, language, id);
1144 if (len > 0)
1145 return len;
1146 }
1147 }
1148 return -EINVAL;
1149}
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165int usb_string_id(struct usb_composite_dev *cdev)
1166{
1167 if (cdev->next_string_id < 254) {
1168
1169
1170
1171 cdev->next_string_id++;
1172 return cdev->next_string_id;
1173 }
1174 return -ENODEV;
1175}
1176EXPORT_SYMBOL_GPL(usb_string_id);
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194int usb_string_ids_tab(struct usb_composite_dev *cdev, struct usb_string *str)
1195{
1196 int next = cdev->next_string_id;
1197
1198 for (; str->s; ++str) {
1199 if (unlikely(next >= 254))
1200 return -ENODEV;
1201 str->id = ++next;
1202 }
1203
1204 cdev->next_string_id = next;
1205
1206 return 0;
1207}
1208EXPORT_SYMBOL_GPL(usb_string_ids_tab);
1209
1210static struct usb_gadget_string_container *copy_gadget_strings(
1211 struct usb_gadget_strings **sp, unsigned n_gstrings,
1212 unsigned n_strings)
1213{
1214 struct usb_gadget_string_container *uc;
1215 struct usb_gadget_strings **gs_array;
1216 struct usb_gadget_strings *gs;
1217 struct usb_string *s;
1218 unsigned mem;
1219 unsigned n_gs;
1220 unsigned n_s;
1221 void *stash;
1222
1223 mem = sizeof(*uc);
1224 mem += sizeof(void *) * (n_gstrings + 1);
1225 mem += sizeof(struct usb_gadget_strings) * n_gstrings;
1226 mem += sizeof(struct usb_string) * (n_strings + 1) * (n_gstrings);
1227 uc = kmalloc(mem, GFP_KERNEL);
1228 if (!uc)
1229 return ERR_PTR(-ENOMEM);
1230 gs_array = get_containers_gs(uc);
1231 stash = uc->stash;
1232 stash += sizeof(void *) * (n_gstrings + 1);
1233 for (n_gs = 0; n_gs < n_gstrings; n_gs++) {
1234 struct usb_string *org_s;
1235
1236 gs_array[n_gs] = stash;
1237 gs = gs_array[n_gs];
1238 stash += sizeof(struct usb_gadget_strings);
1239 gs->language = sp[n_gs]->language;
1240 gs->strings = stash;
1241 org_s = sp[n_gs]->strings;
1242
1243 for (n_s = 0; n_s < n_strings; n_s++) {
1244 s = stash;
1245 stash += sizeof(struct usb_string);
1246 if (org_s->s)
1247 s->s = org_s->s;
1248 else
1249 s->s = "";
1250 org_s++;
1251 }
1252 s = stash;
1253 s->s = NULL;
1254 stash += sizeof(struct usb_string);
1255
1256 }
1257 gs_array[n_gs] = NULL;
1258 return uc;
1259}
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278struct usb_string *usb_gstrings_attach(struct usb_composite_dev *cdev,
1279 struct usb_gadget_strings **sp, unsigned n_strings)
1280{
1281 struct usb_gadget_string_container *uc;
1282 struct usb_gadget_strings **n_gs;
1283 unsigned n_gstrings = 0;
1284 unsigned i;
1285 int ret;
1286
1287 for (i = 0; sp[i]; i++)
1288 n_gstrings++;
1289
1290 if (!n_gstrings)
1291 return ERR_PTR(-EINVAL);
1292
1293 uc = copy_gadget_strings(sp, n_gstrings, n_strings);
1294 if (IS_ERR(uc))
1295 return ERR_CAST(uc);
1296
1297 n_gs = get_containers_gs(uc);
1298 ret = usb_string_ids_tab(cdev, n_gs[0]->strings);
1299 if (ret)
1300 goto err;
1301
1302 for (i = 1; i < n_gstrings; i++) {
1303 struct usb_string *m_s;
1304 struct usb_string *s;
1305 unsigned n;
1306
1307 m_s = n_gs[0]->strings;
1308 s = n_gs[i]->strings;
1309 for (n = 0; n < n_strings; n++) {
1310 s->id = m_s->id;
1311 s++;
1312 m_s++;
1313 }
1314 }
1315 list_add_tail(&uc->list, &cdev->gstrings);
1316 return n_gs[0]->strings;
1317err:
1318 kfree(uc);
1319 return ERR_PTR(ret);
1320}
1321EXPORT_SYMBOL_GPL(usb_gstrings_attach);
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342int usb_string_ids_n(struct usb_composite_dev *c, unsigned n)
1343{
1344 unsigned next = c->next_string_id;
1345 if (unlikely(n > 254 || (unsigned)next + n > 254))
1346 return -ENODEV;
1347 c->next_string_id += n;
1348 return next + 1;
1349}
1350EXPORT_SYMBOL_GPL(usb_string_ids_n);
1351
1352
1353
1354static void composite_setup_complete(struct usb_ep *ep, struct usb_request *req)
1355{
1356 struct usb_composite_dev *cdev;
1357
1358 if (req->status || req->actual != req->length)
1359 DBG((struct usb_composite_dev *) ep->driver_data,
1360 "setup complete --> %d, %d/%d\n",
1361 req->status, req->actual, req->length);
1362
1363
1364
1365
1366
1367
1368
1369
1370 if (!req->context)
1371 return;
1372
1373 cdev = req->context;
1374
1375 if (cdev->req == req)
1376 cdev->setup_pending = false;
1377 else if (cdev->os_desc_req == req)
1378 cdev->os_desc_pending = false;
1379 else
1380 WARN(1, "unknown request %p\n", req);
1381}
1382
1383static int composite_ep0_queue(struct usb_composite_dev *cdev,
1384 struct usb_request *req, gfp_t gfp_flags)
1385{
1386 int ret;
1387
1388 ret = usb_ep_queue(cdev->gadget->ep0, req, gfp_flags);
1389 if (ret == 0) {
1390 if (cdev->req == req)
1391 cdev->setup_pending = true;
1392 else if (cdev->os_desc_req == req)
1393 cdev->os_desc_pending = true;
1394 else
1395 WARN(1, "unknown request %p\n", req);
1396 }
1397
1398 return ret;
1399}
1400
1401static int count_ext_compat(struct usb_configuration *c)
1402{
1403 int i, res;
1404
1405 res = 0;
1406 for (i = 0; i < c->next_interface_id; ++i) {
1407 struct usb_function *f;
1408 int j;
1409
1410 f = c->interface[i];
1411 for (j = 0; j < f->os_desc_n; ++j) {
1412 struct usb_os_desc *d;
1413
1414 if (i != f->os_desc_table[j].if_id)
1415 continue;
1416 d = f->os_desc_table[j].os_desc;
1417 if (d && d->ext_compat_id)
1418 ++res;
1419 }
1420 }
1421 BUG_ON(res > 255);
1422 return res;
1423}
1424
1425static int fill_ext_compat(struct usb_configuration *c, u8 *buf)
1426{
1427 int i, count;
1428
1429 count = 16;
1430 buf += 16;
1431 for (i = 0; i < c->next_interface_id; ++i) {
1432 struct usb_function *f;
1433 int j;
1434
1435 f = c->interface[i];
1436 for (j = 0; j < f->os_desc_n; ++j) {
1437 struct usb_os_desc *d;
1438
1439 if (i != f->os_desc_table[j].if_id)
1440 continue;
1441 d = f->os_desc_table[j].os_desc;
1442 if (d && d->ext_compat_id) {
1443 *buf++ = i;
1444 *buf++ = 0x01;
1445 memcpy(buf, d->ext_compat_id, 16);
1446 buf += 22;
1447 } else {
1448 ++buf;
1449 *buf = 0x01;
1450 buf += 23;
1451 }
1452 count += 24;
1453 if (count + 24 >= USB_COMP_EP0_OS_DESC_BUFSIZ)
1454 return count;
1455 }
1456 }
1457
1458 return count;
1459}
1460
1461static int count_ext_prop(struct usb_configuration *c, int interface)
1462{
1463 struct usb_function *f;
1464 int j;
1465
1466 f = c->interface[interface];
1467 for (j = 0; j < f->os_desc_n; ++j) {
1468 struct usb_os_desc *d;
1469
1470 if (interface != f->os_desc_table[j].if_id)
1471 continue;
1472 d = f->os_desc_table[j].os_desc;
1473 if (d && d->ext_compat_id)
1474 return d->ext_prop_count;
1475 }
1476 return 0;
1477}
1478
1479static int len_ext_prop(struct usb_configuration *c, int interface)
1480{
1481 struct usb_function *f;
1482 struct usb_os_desc *d;
1483 int j, res;
1484
1485 res = 10;
1486 f = c->interface[interface];
1487 for (j = 0; j < f->os_desc_n; ++j) {
1488 if (interface != f->os_desc_table[j].if_id)
1489 continue;
1490 d = f->os_desc_table[j].os_desc;
1491 if (d)
1492 return min(res + d->ext_prop_len, 4096);
1493 }
1494 return res;
1495}
1496
1497static int fill_ext_prop(struct usb_configuration *c, int interface, u8 *buf)
1498{
1499 struct usb_function *f;
1500 struct usb_os_desc *d;
1501 struct usb_os_desc_ext_prop *ext_prop;
1502 int j, count, n, ret;
1503
1504 f = c->interface[interface];
1505 count = 10;
1506 buf += 10;
1507 for (j = 0; j < f->os_desc_n; ++j) {
1508 if (interface != f->os_desc_table[j].if_id)
1509 continue;
1510 d = f->os_desc_table[j].os_desc;
1511 if (d)
1512 list_for_each_entry(ext_prop, &d->ext_prop, entry) {
1513 n = ext_prop->data_len +
1514 ext_prop->name_len + 14;
1515 if (count + n >= USB_COMP_EP0_OS_DESC_BUFSIZ)
1516 return count;
1517 usb_ext_prop_put_size(buf, n);
1518 usb_ext_prop_put_type(buf, ext_prop->type);
1519 ret = usb_ext_prop_put_name(buf, ext_prop->name,
1520 ext_prop->name_len);
1521 if (ret < 0)
1522 return ret;
1523 switch (ext_prop->type) {
1524 case USB_EXT_PROP_UNICODE:
1525 case USB_EXT_PROP_UNICODE_ENV:
1526 case USB_EXT_PROP_UNICODE_LINK:
1527 usb_ext_prop_put_unicode(buf, ret,
1528 ext_prop->data,
1529 ext_prop->data_len);
1530 break;
1531 case USB_EXT_PROP_BINARY:
1532 usb_ext_prop_put_binary(buf, ret,
1533 ext_prop->data,
1534 ext_prop->data_len);
1535 break;
1536 case USB_EXT_PROP_LE32:
1537
1538 case USB_EXT_PROP_BE32:
1539
1540 default:
1541 return -EINVAL;
1542 }
1543 buf += n;
1544 count += n;
1545 }
1546 }
1547
1548 return count;
1549}
1550
1551
1552
1553
1554
1555
1556
1557
1558int
1559composite_setup(struct usb_gadget *gadget, const struct usb_ctrlrequest *ctrl)
1560{
1561 struct usb_composite_dev *cdev = get_gadget_data(gadget);
1562 struct usb_request *req = cdev->req;
1563 int value = -EOPNOTSUPP;
1564 int status = 0;
1565 u16 w_index = le16_to_cpu(ctrl->wIndex);
1566 u8 intf = w_index & 0xFF;
1567 u16 w_value = le16_to_cpu(ctrl->wValue);
1568 u16 w_length = le16_to_cpu(ctrl->wLength);
1569 struct usb_function *f = NULL;
1570 u8 endp;
1571
1572
1573
1574
1575
1576 req->zero = 0;
1577 req->context = cdev;
1578 req->complete = composite_setup_complete;
1579 req->length = 0;
1580 gadget->ep0->driver_data = cdev;
1581
1582
1583
1584
1585
1586 if ((ctrl->bRequestType & USB_TYPE_MASK) != USB_TYPE_STANDARD)
1587 goto unknown;
1588
1589 switch (ctrl->bRequest) {
1590
1591
1592 case USB_REQ_GET_DESCRIPTOR:
1593 if (ctrl->bRequestType != USB_DIR_IN)
1594 goto unknown;
1595 switch (w_value >> 8) {
1596
1597 case USB_DT_DEVICE:
1598 cdev->desc.bNumConfigurations =
1599 count_configs(cdev, USB_DT_DEVICE);
1600 cdev->desc.bMaxPacketSize0 =
1601 cdev->gadget->ep0->maxpacket;
1602 if (gadget_is_superspeed(gadget)) {
1603 if (gadget->speed >= USB_SPEED_SUPER) {
1604 cdev->desc.bcdUSB = cpu_to_le16(0x0320);
1605 cdev->desc.bMaxPacketSize0 = 9;
1606 } else {
1607 cdev->desc.bcdUSB = cpu_to_le16(0x0210);
1608 }
1609 } else {
1610 if (gadget->lpm_capable)
1611 cdev->desc.bcdUSB = cpu_to_le16(0x0201);
1612 else
1613 cdev->desc.bcdUSB = cpu_to_le16(0x0200);
1614 }
1615
1616 value = min(w_length, (u16) sizeof cdev->desc);
1617 memcpy(req->buf, &cdev->desc, value);
1618 break;
1619 case USB_DT_DEVICE_QUALIFIER:
1620 if (!gadget_is_dualspeed(gadget) ||
1621 gadget->speed >= USB_SPEED_SUPER)
1622 break;
1623 device_qual(cdev);
1624 value = min_t(int, w_length,
1625 sizeof(struct usb_qualifier_descriptor));
1626 break;
1627 case USB_DT_OTHER_SPEED_CONFIG:
1628 if (!gadget_is_dualspeed(gadget) ||
1629 gadget->speed >= USB_SPEED_SUPER)
1630 break;
1631
1632 case USB_DT_CONFIG:
1633 value = config_desc(cdev, w_value);
1634 if (value >= 0)
1635 value = min(w_length, (u16) value);
1636 break;
1637 case USB_DT_STRING:
1638 value = get_string(cdev, req->buf,
1639 w_index, w_value & 0xff);
1640 if (value >= 0)
1641 value = min(w_length, (u16) value);
1642 break;
1643 case USB_DT_BOS:
1644 if (gadget_is_superspeed(gadget) ||
1645 gadget->lpm_capable) {
1646 value = bos_desc(cdev);
1647 value = min(w_length, (u16) value);
1648 }
1649 break;
1650 case USB_DT_OTG:
1651 if (gadget_is_otg(gadget)) {
1652 struct usb_configuration *config;
1653 int otg_desc_len = 0;
1654
1655 if (cdev->config)
1656 config = cdev->config;
1657 else
1658 config = list_first_entry(
1659 &cdev->configs,
1660 struct usb_configuration, list);
1661 if (!config)
1662 goto done;
1663
1664 if (gadget->otg_caps &&
1665 (gadget->otg_caps->otg_rev >= 0x0200))
1666 otg_desc_len += sizeof(
1667 struct usb_otg20_descriptor);
1668 else
1669 otg_desc_len += sizeof(
1670 struct usb_otg_descriptor);
1671
1672 value = min_t(int, w_length, otg_desc_len);
1673 memcpy(req->buf, config->descriptors[0], value);
1674 }
1675 break;
1676 }
1677 break;
1678
1679
1680 case USB_REQ_SET_CONFIGURATION:
1681 if (ctrl->bRequestType != 0)
1682 goto unknown;
1683 if (gadget_is_otg(gadget)) {
1684 if (gadget->a_hnp_support)
1685 DBG(cdev, "HNP available\n");
1686 else if (gadget->a_alt_hnp_support)
1687 DBG(cdev, "HNP on another port\n");
1688 else
1689 VDBG(cdev, "HNP inactive\n");
1690 }
1691 spin_lock(&cdev->lock);
1692 value = set_config(cdev, ctrl, w_value);
1693 spin_unlock(&cdev->lock);
1694 break;
1695 case USB_REQ_GET_CONFIGURATION:
1696 if (ctrl->bRequestType != USB_DIR_IN)
1697 goto unknown;
1698 if (cdev->config)
1699 *(u8 *)req->buf = cdev->config->bConfigurationValue;
1700 else
1701 *(u8 *)req->buf = 0;
1702 value = min(w_length, (u16) 1);
1703 break;
1704
1705
1706 case USB_REQ_SET_INTERFACE:
1707 if (ctrl->bRequestType != USB_RECIP_INTERFACE)
1708 goto unknown;
1709 if (!cdev->config || intf >= MAX_CONFIG_INTERFACES)
1710 break;
1711 f = cdev->config->interface[intf];
1712 if (!f)
1713 break;
1714
1715
1716
1717
1718
1719
1720 if (w_value && !f->get_alt)
1721 break;
1722
1723 spin_lock(&cdev->lock);
1724 value = f->set_alt(f, w_index, w_value);
1725 if (value == USB_GADGET_DELAYED_STATUS) {
1726 DBG(cdev,
1727 "%s: interface %d (%s) requested delayed status\n",
1728 __func__, intf, f->name);
1729 cdev->delayed_status++;
1730 DBG(cdev, "delayed_status count %d\n",
1731 cdev->delayed_status);
1732 }
1733 spin_unlock(&cdev->lock);
1734 break;
1735 case USB_REQ_GET_INTERFACE:
1736 if (ctrl->bRequestType != (USB_DIR_IN|USB_RECIP_INTERFACE))
1737 goto unknown;
1738 if (!cdev->config || intf >= MAX_CONFIG_INTERFACES)
1739 break;
1740 f = cdev->config->interface[intf];
1741 if (!f)
1742 break;
1743
1744 value = f->get_alt ? f->get_alt(f, w_index) : 0;
1745 if (value < 0)
1746 break;
1747 *((u8 *)req->buf) = value;
1748 value = min(w_length, (u16) 1);
1749 break;
1750 case USB_REQ_GET_STATUS:
1751 if (gadget_is_otg(gadget) && gadget->hnp_polling_support &&
1752 (w_index == OTG_STS_SELECTOR)) {
1753 if (ctrl->bRequestType != (USB_DIR_IN |
1754 USB_RECIP_DEVICE))
1755 goto unknown;
1756 *((u8 *)req->buf) = gadget->host_request_flag;
1757 value = 1;
1758 break;
1759 }
1760
1761
1762
1763
1764
1765
1766
1767
1768 if (!gadget_is_superspeed(gadget))
1769 goto unknown;
1770 if (ctrl->bRequestType != (USB_DIR_IN | USB_RECIP_INTERFACE))
1771 goto unknown;
1772 value = 2;
1773 put_unaligned_le16(0, req->buf);
1774 if (!cdev->config || intf >= MAX_CONFIG_INTERFACES)
1775 break;
1776 f = cdev->config->interface[intf];
1777 if (!f)
1778 break;
1779 status = f->get_status ? f->get_status(f) : 0;
1780 if (status < 0)
1781 break;
1782 put_unaligned_le16(status & 0x0000ffff, req->buf);
1783 break;
1784
1785
1786
1787
1788
1789 case USB_REQ_CLEAR_FEATURE:
1790 case USB_REQ_SET_FEATURE:
1791 if (!gadget_is_superspeed(gadget))
1792 goto unknown;
1793 if (ctrl->bRequestType != (USB_DIR_OUT | USB_RECIP_INTERFACE))
1794 goto unknown;
1795 switch (w_value) {
1796 case USB_INTRF_FUNC_SUSPEND:
1797 if (!cdev->config || intf >= MAX_CONFIG_INTERFACES)
1798 break;
1799 f = cdev->config->interface[intf];
1800 if (!f)
1801 break;
1802 value = 0;
1803 if (f->func_suspend)
1804 value = f->func_suspend(f, w_index >> 8);
1805 if (value < 0) {
1806 ERROR(cdev,
1807 "func_suspend() returned error %d\n",
1808 value);
1809 value = 0;
1810 }
1811 break;
1812 }
1813 break;
1814 default:
1815unknown:
1816
1817
1818
1819 if (cdev->use_os_string && cdev->os_desc_config &&
1820 (ctrl->bRequestType & USB_TYPE_VENDOR) &&
1821 ctrl->bRequest == cdev->b_vendor_code) {
1822 struct usb_configuration *os_desc_cfg;
1823 u8 *buf;
1824 int interface;
1825 int count = 0;
1826
1827 req = cdev->os_desc_req;
1828 req->context = cdev;
1829 req->complete = composite_setup_complete;
1830 buf = req->buf;
1831 os_desc_cfg = cdev->os_desc_config;
1832 w_length = min_t(u16, w_length, USB_COMP_EP0_OS_DESC_BUFSIZ);
1833 memset(buf, 0, w_length);
1834 buf[5] = 0x01;
1835 switch (ctrl->bRequestType & USB_RECIP_MASK) {
1836 case USB_RECIP_DEVICE:
1837 if (w_index != 0x4 || (w_value >> 8))
1838 break;
1839 buf[6] = w_index;
1840
1841 count = count_ext_compat(os_desc_cfg);
1842 buf[8] = count;
1843 count *= 24;
1844 count += 16;
1845 put_unaligned_le32(count, buf);
1846 value = w_length;
1847 if (w_length > 0x10) {
1848 value = fill_ext_compat(os_desc_cfg, buf);
1849 value = min_t(u16, w_length, value);
1850 }
1851 break;
1852 case USB_RECIP_INTERFACE:
1853 if (w_index != 0x5 || (w_value >> 8))
1854 break;
1855 interface = w_value & 0xFF;
1856 buf[6] = w_index;
1857 count = count_ext_prop(os_desc_cfg,
1858 interface);
1859 put_unaligned_le16(count, buf + 8);
1860 count = len_ext_prop(os_desc_cfg,
1861 interface);
1862 put_unaligned_le32(count, buf);
1863 value = w_length;
1864 if (w_length > 0x0A) {
1865 value = fill_ext_prop(os_desc_cfg,
1866 interface, buf);
1867 if (value >= 0)
1868 value = min_t(u16, w_length, value);
1869 }
1870 break;
1871 }
1872
1873 goto check_value;
1874 }
1875
1876 VDBG(cdev,
1877 "non-core control req%02x.%02x v%04x i%04x l%d\n",
1878 ctrl->bRequestType, ctrl->bRequest,
1879 w_value, w_index, w_length);
1880
1881
1882
1883
1884
1885 if (cdev->config) {
1886 list_for_each_entry(f, &cdev->config->functions, list)
1887 if (f->req_match &&
1888 f->req_match(f, ctrl, false))
1889 goto try_fun_setup;
1890 } else {
1891 struct usb_configuration *c;
1892 list_for_each_entry(c, &cdev->configs, list)
1893 list_for_each_entry(f, &c->functions, list)
1894 if (f->req_match &&
1895 f->req_match(f, ctrl, true))
1896 goto try_fun_setup;
1897 }
1898 f = NULL;
1899
1900 switch (ctrl->bRequestType & USB_RECIP_MASK) {
1901 case USB_RECIP_INTERFACE:
1902 if (!cdev->config || intf >= MAX_CONFIG_INTERFACES)
1903 break;
1904 f = cdev->config->interface[intf];
1905 break;
1906
1907 case USB_RECIP_ENDPOINT:
1908 if (!cdev->config)
1909 break;
1910 endp = ((w_index & 0x80) >> 3) | (w_index & 0x0f);
1911 list_for_each_entry(f, &cdev->config->functions, list) {
1912 if (test_bit(endp, f->endpoints))
1913 break;
1914 }
1915 if (&f->list == &cdev->config->functions)
1916 f = NULL;
1917 break;
1918 }
1919try_fun_setup:
1920 if (f && f->setup)
1921 value = f->setup(f, ctrl);
1922 else {
1923 struct usb_configuration *c;
1924
1925 c = cdev->config;
1926 if (!c)
1927 goto done;
1928
1929
1930 if (c->setup) {
1931 value = c->setup(c, ctrl);
1932 goto done;
1933 }
1934
1935
1936 if (!list_is_singular(&c->functions))
1937 goto done;
1938 f = list_first_entry(&c->functions, struct usb_function,
1939 list);
1940 if (f->setup)
1941 value = f->setup(f, ctrl);
1942 }
1943
1944 goto done;
1945 }
1946
1947check_value:
1948
1949 if (value >= 0 && value != USB_GADGET_DELAYED_STATUS) {
1950 req->length = value;
1951 req->context = cdev;
1952 req->zero = value < w_length;
1953 value = composite_ep0_queue(cdev, req, GFP_ATOMIC);
1954 if (value < 0) {
1955 DBG(cdev, "ep_queue --> %d\n", value);
1956 req->status = 0;
1957 composite_setup_complete(gadget->ep0, req);
1958 }
1959 } else if (value == USB_GADGET_DELAYED_STATUS && w_length != 0) {
1960 WARN(cdev,
1961 "%s: Delayed status not supported for w_length != 0",
1962 __func__);
1963 }
1964
1965done:
1966
1967 return value;
1968}
1969
1970void composite_disconnect(struct usb_gadget *gadget)
1971{
1972 struct usb_composite_dev *cdev = get_gadget_data(gadget);
1973 unsigned long flags;
1974
1975
1976
1977
1978 spin_lock_irqsave(&cdev->lock, flags);
1979 cdev->suspended = 0;
1980 if (cdev->config)
1981 reset_config(cdev);
1982 if (cdev->driver->disconnect)
1983 cdev->driver->disconnect(cdev);
1984 spin_unlock_irqrestore(&cdev->lock, flags);
1985}
1986
1987
1988
1989static ssize_t suspended_show(struct device *dev, struct device_attribute *attr,
1990 char *buf)
1991{
1992 struct usb_gadget *gadget = dev_to_usb_gadget(dev);
1993 struct usb_composite_dev *cdev = get_gadget_data(gadget);
1994
1995 return sprintf(buf, "%d\n", cdev->suspended);
1996}
1997static DEVICE_ATTR_RO(suspended);
1998
1999static void __composite_unbind(struct usb_gadget *gadget, bool unbind_driver)
2000{
2001 struct usb_composite_dev *cdev = get_gadget_data(gadget);
2002 struct usb_gadget_strings *gstr = cdev->driver->strings[0];
2003 struct usb_string *dev_str = gstr->strings;
2004
2005
2006
2007
2008
2009
2010 WARN_ON(cdev->config);
2011
2012 while (!list_empty(&cdev->configs)) {
2013 struct usb_configuration *c;
2014 c = list_first_entry(&cdev->configs,
2015 struct usb_configuration, list);
2016 remove_config(cdev, c);
2017 }
2018 if (cdev->driver->unbind && unbind_driver)
2019 cdev->driver->unbind(cdev);
2020
2021 composite_dev_cleanup(cdev);
2022
2023 if (dev_str[USB_GADGET_MANUFACTURER_IDX].s == cdev->def_manufacturer)
2024 dev_str[USB_GADGET_MANUFACTURER_IDX].s = "";
2025
2026 kfree(cdev->def_manufacturer);
2027 kfree(cdev);
2028 set_gadget_data(gadget, NULL);
2029}
2030
2031static void composite_unbind(struct usb_gadget *gadget)
2032{
2033 __composite_unbind(gadget, true);
2034}
2035
2036static void update_unchanged_dev_desc(struct usb_device_descriptor *new,
2037 const struct usb_device_descriptor *old)
2038{
2039 __le16 idVendor;
2040 __le16 idProduct;
2041 __le16 bcdDevice;
2042 u8 iSerialNumber;
2043 u8 iManufacturer;
2044 u8 iProduct;
2045
2046
2047
2048
2049
2050 idVendor = new->idVendor;
2051 idProduct = new->idProduct;
2052 bcdDevice = new->bcdDevice;
2053 iSerialNumber = new->iSerialNumber;
2054 iManufacturer = new->iManufacturer;
2055 iProduct = new->iProduct;
2056
2057 *new = *old;
2058 if (idVendor)
2059 new->idVendor = idVendor;
2060 if (idProduct)
2061 new->idProduct = idProduct;
2062 if (bcdDevice)
2063 new->bcdDevice = bcdDevice;
2064 else
2065 new->bcdDevice = cpu_to_le16(get_default_bcdDevice());
2066 if (iSerialNumber)
2067 new->iSerialNumber = iSerialNumber;
2068 if (iManufacturer)
2069 new->iManufacturer = iManufacturer;
2070 if (iProduct)
2071 new->iProduct = iProduct;
2072}
2073
2074int composite_dev_prepare(struct usb_composite_driver *composite,
2075 struct usb_composite_dev *cdev)
2076{
2077 struct usb_gadget *gadget = cdev->gadget;
2078 int ret = -ENOMEM;
2079
2080
2081 cdev->req = usb_ep_alloc_request(gadget->ep0, GFP_KERNEL);
2082 if (!cdev->req)
2083 return -ENOMEM;
2084
2085 cdev->req->buf = kmalloc(USB_COMP_EP0_BUFSIZ, GFP_KERNEL);
2086 if (!cdev->req->buf)
2087 goto fail;
2088
2089 ret = device_create_file(&gadget->dev, &dev_attr_suspended);
2090 if (ret)
2091 goto fail_dev;
2092
2093 cdev->req->complete = composite_setup_complete;
2094 cdev->req->context = cdev;
2095 gadget->ep0->driver_data = cdev;
2096
2097 cdev->driver = composite;
2098
2099
2100
2101
2102
2103
2104 if (CONFIG_USB_GADGET_VBUS_DRAW <= USB_SELF_POWER_VBUS_MAX_DRAW)
2105 usb_gadget_set_selfpowered(gadget);
2106
2107
2108
2109
2110
2111 usb_ep_autoconfig_reset(gadget);
2112 return 0;
2113fail_dev:
2114 kfree(cdev->req->buf);
2115fail:
2116 usb_ep_free_request(gadget->ep0, cdev->req);
2117 cdev->req = NULL;
2118 return ret;
2119}
2120
2121int composite_os_desc_req_prepare(struct usb_composite_dev *cdev,
2122 struct usb_ep *ep0)
2123{
2124 int ret = 0;
2125
2126 cdev->os_desc_req = usb_ep_alloc_request(ep0, GFP_KERNEL);
2127 if (!cdev->os_desc_req) {
2128 ret = -ENOMEM;
2129 goto end;
2130 }
2131
2132 cdev->os_desc_req->buf = kmalloc(USB_COMP_EP0_OS_DESC_BUFSIZ,
2133 GFP_KERNEL);
2134 if (!cdev->os_desc_req->buf) {
2135 ret = -ENOMEM;
2136 usb_ep_free_request(ep0, cdev->os_desc_req);
2137 goto end;
2138 }
2139 cdev->os_desc_req->context = cdev;
2140 cdev->os_desc_req->complete = composite_setup_complete;
2141end:
2142 return ret;
2143}
2144
2145void composite_dev_cleanup(struct usb_composite_dev *cdev)
2146{
2147 struct usb_gadget_string_container *uc, *tmp;
2148 struct usb_ep *ep, *tmp_ep;
2149
2150 list_for_each_entry_safe(uc, tmp, &cdev->gstrings, list) {
2151 list_del(&uc->list);
2152 kfree(uc);
2153 }
2154 if (cdev->os_desc_req) {
2155 if (cdev->os_desc_pending)
2156 usb_ep_dequeue(cdev->gadget->ep0, cdev->os_desc_req);
2157
2158 kfree(cdev->os_desc_req->buf);
2159 usb_ep_free_request(cdev->gadget->ep0, cdev->os_desc_req);
2160 }
2161 if (cdev->req) {
2162 if (cdev->setup_pending)
2163 usb_ep_dequeue(cdev->gadget->ep0, cdev->req);
2164
2165 kfree(cdev->req->buf);
2166 usb_ep_free_request(cdev->gadget->ep0, cdev->req);
2167 }
2168 cdev->next_string_id = 0;
2169 device_remove_file(&cdev->gadget->dev, &dev_attr_suspended);
2170
2171
2172
2173
2174
2175
2176
2177
2178
2179
2180 list_for_each_entry_safe(ep, tmp_ep,
2181 &cdev->gadget->ep_list, ep_list) {
2182 if (ep->ops->dispose)
2183 ep->ops->dispose(ep);
2184 }
2185}
2186
2187static int composite_bind(struct usb_gadget *gadget,
2188 struct usb_gadget_driver *gdriver)
2189{
2190 struct usb_composite_dev *cdev;
2191 struct usb_composite_driver *composite = to_cdriver(gdriver);
2192 int status = -ENOMEM;
2193
2194 cdev = kzalloc(sizeof *cdev, GFP_KERNEL);
2195 if (!cdev)
2196 return status;
2197
2198 spin_lock_init(&cdev->lock);
2199 cdev->gadget = gadget;
2200 set_gadget_data(gadget, cdev);
2201 INIT_LIST_HEAD(&cdev->configs);
2202 INIT_LIST_HEAD(&cdev->gstrings);
2203
2204 status = composite_dev_prepare(composite, cdev);
2205 if (status)
2206 goto fail;
2207
2208
2209
2210
2211
2212 status = composite->bind(cdev);
2213 if (status < 0)
2214 goto fail;
2215
2216 if (cdev->use_os_string) {
2217 status = composite_os_desc_req_prepare(cdev, gadget->ep0);
2218 if (status)
2219 goto fail;
2220 }
2221
2222 update_unchanged_dev_desc(&cdev->desc, composite->dev);
2223
2224
2225 if (composite->needs_serial && !cdev->desc.iSerialNumber)
2226 WARNING(cdev, "userspace failed to provide iSerialNumber\n");
2227
2228 INFO(cdev, "%s ready\n", composite->name);
2229 return 0;
2230
2231fail:
2232 __composite_unbind(gadget, false);
2233 return status;
2234}
2235
2236
2237
2238void composite_suspend(struct usb_gadget *gadget)
2239{
2240 struct usb_composite_dev *cdev = get_gadget_data(gadget);
2241 struct usb_function *f;
2242
2243
2244
2245
2246 DBG(cdev, "suspend\n");
2247 if (cdev->config) {
2248 list_for_each_entry(f, &cdev->config->functions, list) {
2249 if (f->suspend)
2250 f->suspend(f);
2251 }
2252 }
2253 if (cdev->driver->suspend)
2254 cdev->driver->suspend(cdev);
2255
2256 cdev->suspended = 1;
2257
2258 usb_gadget_vbus_draw(gadget, 2);
2259}
2260
2261void composite_resume(struct usb_gadget *gadget)
2262{
2263 struct usb_composite_dev *cdev = get_gadget_data(gadget);
2264 struct usb_function *f;
2265 u16 maxpower;
2266
2267
2268
2269
2270 DBG(cdev, "resume\n");
2271 if (cdev->driver->resume)
2272 cdev->driver->resume(cdev);
2273 if (cdev->config) {
2274 list_for_each_entry(f, &cdev->config->functions, list) {
2275 if (f->resume)
2276 f->resume(f);
2277 }
2278
2279 maxpower = cdev->config->MaxPower;
2280
2281 usb_gadget_vbus_draw(gadget, maxpower ?
2282 maxpower : CONFIG_USB_GADGET_VBUS_DRAW);
2283 }
2284
2285 cdev->suspended = 0;
2286}
2287
2288
2289
2290static const struct usb_gadget_driver composite_driver_template = {
2291 .bind = composite_bind,
2292 .unbind = composite_unbind,
2293
2294 .setup = composite_setup,
2295 .reset = composite_disconnect,
2296 .disconnect = composite_disconnect,
2297
2298 .suspend = composite_suspend,
2299 .resume = composite_resume,
2300
2301 .driver = {
2302 .owner = THIS_MODULE,
2303 },
2304};
2305
2306
2307
2308
2309
2310
2311
2312
2313
2314
2315
2316
2317
2318
2319
2320
2321
2322int usb_composite_probe(struct usb_composite_driver *driver)
2323{
2324 struct usb_gadget_driver *gadget_driver;
2325
2326 if (!driver || !driver->dev || !driver->bind)
2327 return -EINVAL;
2328
2329 if (!driver->name)
2330 driver->name = "composite";
2331
2332 driver->gadget_driver = composite_driver_template;
2333 gadget_driver = &driver->gadget_driver;
2334
2335 gadget_driver->function = (char *) driver->name;
2336 gadget_driver->driver.name = driver->name;
2337 gadget_driver->max_speed = driver->max_speed;
2338
2339 return usb_gadget_probe_driver(gadget_driver);
2340}
2341EXPORT_SYMBOL_GPL(usb_composite_probe);
2342
2343
2344
2345
2346
2347
2348
2349
2350void usb_composite_unregister(struct usb_composite_driver *driver)
2351{
2352 usb_gadget_unregister_driver(&driver->gadget_driver);
2353}
2354EXPORT_SYMBOL_GPL(usb_composite_unregister);
2355
2356
2357
2358
2359
2360
2361
2362
2363
2364
2365
2366void usb_composite_setup_continue(struct usb_composite_dev *cdev)
2367{
2368 int value;
2369 struct usb_request *req = cdev->req;
2370 unsigned long flags;
2371
2372 DBG(cdev, "%s\n", __func__);
2373 spin_lock_irqsave(&cdev->lock, flags);
2374
2375 if (cdev->delayed_status == 0) {
2376 WARN(cdev, "%s: Unexpected call\n", __func__);
2377
2378 } else if (--cdev->delayed_status == 0) {
2379 DBG(cdev, "%s: Completing delayed status\n", __func__);
2380 req->length = 0;
2381 req->context = cdev;
2382 value = composite_ep0_queue(cdev, req, GFP_ATOMIC);
2383 if (value < 0) {
2384 DBG(cdev, "ep_queue --> %d\n", value);
2385 req->status = 0;
2386 composite_setup_complete(cdev->gadget->ep0, req);
2387 }
2388 }
2389
2390 spin_unlock_irqrestore(&cdev->lock, flags);
2391}
2392EXPORT_SYMBOL_GPL(usb_composite_setup_continue);
2393
2394static char *composite_default_mfr(struct usb_gadget *gadget)
2395{
2396 return kasprintf(GFP_KERNEL, "%s %s with %s", init_utsname()->sysname,
2397 init_utsname()->release, gadget->name);
2398}
2399
2400void usb_composite_overwrite_options(struct usb_composite_dev *cdev,
2401 struct usb_composite_overwrite *covr)
2402{
2403 struct usb_device_descriptor *desc = &cdev->desc;
2404 struct usb_gadget_strings *gstr = cdev->driver->strings[0];
2405 struct usb_string *dev_str = gstr->strings;
2406
2407 if (covr->idVendor)
2408 desc->idVendor = cpu_to_le16(covr->idVendor);
2409
2410 if (covr->idProduct)
2411 desc->idProduct = cpu_to_le16(covr->idProduct);
2412
2413 if (covr->bcdDevice)
2414 desc->bcdDevice = cpu_to_le16(covr->bcdDevice);
2415
2416 if (covr->serial_number) {
2417 desc->iSerialNumber = dev_str[USB_GADGET_SERIAL_IDX].id;
2418 dev_str[USB_GADGET_SERIAL_IDX].s = covr->serial_number;
2419 }
2420 if (covr->manufacturer) {
2421 desc->iManufacturer = dev_str[USB_GADGET_MANUFACTURER_IDX].id;
2422 dev_str[USB_GADGET_MANUFACTURER_IDX].s = covr->manufacturer;
2423
2424 } else if (!strlen(dev_str[USB_GADGET_MANUFACTURER_IDX].s)) {
2425 desc->iManufacturer = dev_str[USB_GADGET_MANUFACTURER_IDX].id;
2426 cdev->def_manufacturer = composite_default_mfr(cdev->gadget);
2427 dev_str[USB_GADGET_MANUFACTURER_IDX].s = cdev->def_manufacturer;
2428 }
2429
2430 if (covr->product) {
2431 desc->iProduct = dev_str[USB_GADGET_PRODUCT_IDX].id;
2432 dev_str[USB_GADGET_PRODUCT_IDX].s = covr->product;
2433 }
2434}
2435EXPORT_SYMBOL_GPL(usb_composite_overwrite_options);
2436
2437MODULE_LICENSE("GPL");
2438MODULE_AUTHOR("David Brownell");
2439