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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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143
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 if (speed < USB_SPEED_SUPER)
441 return min(val, 500U) / 2;
442 else
443
444
445
446
447 return min(val, 900U) / 8;
448}
449
450static int config_buf(struct usb_configuration *config,
451 enum usb_device_speed speed, void *buf, u8 type)
452{
453 struct usb_config_descriptor *c = buf;
454 void *next = buf + USB_DT_CONFIG_SIZE;
455 int len;
456 struct usb_function *f;
457 int status;
458
459 len = USB_COMP_EP0_BUFSIZ - USB_DT_CONFIG_SIZE;
460
461 c = buf;
462 c->bLength = USB_DT_CONFIG_SIZE;
463 c->bDescriptorType = type;
464
465 c->bNumInterfaces = config->next_interface_id;
466 c->bConfigurationValue = config->bConfigurationValue;
467 c->iConfiguration = config->iConfiguration;
468 c->bmAttributes = USB_CONFIG_ATT_ONE | config->bmAttributes;
469 c->bMaxPower = encode_bMaxPower(speed, config);
470
471
472 if (config->descriptors) {
473 status = usb_descriptor_fillbuf(next, len,
474 config->descriptors);
475 if (status < 0)
476 return status;
477 len -= status;
478 next += status;
479 }
480
481
482 list_for_each_entry(f, &config->functions, list) {
483 struct usb_descriptor_header **descriptors;
484
485 descriptors = function_descriptors(f, speed);
486 if (!descriptors)
487 continue;
488 status = usb_descriptor_fillbuf(next, len,
489 (const struct usb_descriptor_header **) descriptors);
490 if (status < 0)
491 return status;
492 len -= status;
493 next += status;
494 }
495
496 len = next - buf;
497 c->wTotalLength = cpu_to_le16(len);
498 return len;
499}
500
501static int config_desc(struct usb_composite_dev *cdev, unsigned w_value)
502{
503 struct usb_gadget *gadget = cdev->gadget;
504 struct usb_configuration *c;
505 struct list_head *pos;
506 u8 type = w_value >> 8;
507 enum usb_device_speed speed = USB_SPEED_UNKNOWN;
508
509 if (gadget->speed >= USB_SPEED_SUPER)
510 speed = gadget->speed;
511 else if (gadget_is_dualspeed(gadget)) {
512 int hs = 0;
513 if (gadget->speed == USB_SPEED_HIGH)
514 hs = 1;
515 if (type == USB_DT_OTHER_SPEED_CONFIG)
516 hs = !hs;
517 if (hs)
518 speed = USB_SPEED_HIGH;
519
520 }
521
522
523 w_value &= 0xff;
524
525 pos = &cdev->configs;
526 c = cdev->os_desc_config;
527 if (c)
528 goto check_config;
529
530 while ((pos = pos->next) != &cdev->configs) {
531 c = list_entry(pos, typeof(*c), list);
532
533
534 if (c == cdev->os_desc_config)
535 continue;
536
537check_config:
538
539 switch (speed) {
540 case USB_SPEED_SUPER_PLUS:
541 if (!c->superspeed_plus)
542 continue;
543 break;
544 case USB_SPEED_SUPER:
545 if (!c->superspeed)
546 continue;
547 break;
548 case USB_SPEED_HIGH:
549 if (!c->highspeed)
550 continue;
551 break;
552 default:
553 if (!c->fullspeed)
554 continue;
555 }
556
557 if (w_value == 0)
558 return config_buf(c, speed, cdev->req->buf, type);
559 w_value--;
560 }
561 return -EINVAL;
562}
563
564static int count_configs(struct usb_composite_dev *cdev, unsigned type)
565{
566 struct usb_gadget *gadget = cdev->gadget;
567 struct usb_configuration *c;
568 unsigned count = 0;
569 int hs = 0;
570 int ss = 0;
571 int ssp = 0;
572
573 if (gadget_is_dualspeed(gadget)) {
574 if (gadget->speed == USB_SPEED_HIGH)
575 hs = 1;
576 if (gadget->speed == USB_SPEED_SUPER)
577 ss = 1;
578 if (gadget->speed == USB_SPEED_SUPER_PLUS)
579 ssp = 1;
580 if (type == USB_DT_DEVICE_QUALIFIER)
581 hs = !hs;
582 }
583 list_for_each_entry(c, &cdev->configs, list) {
584
585 if (ssp) {
586 if (!c->superspeed_plus)
587 continue;
588 } else if (ss) {
589 if (!c->superspeed)
590 continue;
591 } else if (hs) {
592 if (!c->highspeed)
593 continue;
594 } else {
595 if (!c->fullspeed)
596 continue;
597 }
598 count++;
599 }
600 return count;
601}
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610
611
612static int bos_desc(struct usb_composite_dev *cdev)
613{
614 struct usb_ext_cap_descriptor *usb_ext;
615 struct usb_dcd_config_params dcd_config_params;
616 struct usb_bos_descriptor *bos = cdev->req->buf;
617 unsigned int besl = 0;
618
619 bos->bLength = USB_DT_BOS_SIZE;
620 bos->bDescriptorType = USB_DT_BOS;
621
622 bos->wTotalLength = cpu_to_le16(USB_DT_BOS_SIZE);
623 bos->bNumDeviceCaps = 0;
624
625
626 if (cdev->gadget->ops->get_config_params) {
627 cdev->gadget->ops->get_config_params(cdev->gadget,
628 &dcd_config_params);
629 } else {
630 dcd_config_params.besl_baseline =
631 USB_DEFAULT_BESL_UNSPECIFIED;
632 dcd_config_params.besl_deep =
633 USB_DEFAULT_BESL_UNSPECIFIED;
634 dcd_config_params.bU1devExitLat =
635 USB_DEFAULT_U1_DEV_EXIT_LAT;
636 dcd_config_params.bU2DevExitLat =
637 cpu_to_le16(USB_DEFAULT_U2_DEV_EXIT_LAT);
638 }
639
640 if (dcd_config_params.besl_baseline != USB_DEFAULT_BESL_UNSPECIFIED)
641 besl = USB_BESL_BASELINE_VALID |
642 USB_SET_BESL_BASELINE(dcd_config_params.besl_baseline);
643
644 if (dcd_config_params.besl_deep != USB_DEFAULT_BESL_UNSPECIFIED)
645 besl |= USB_BESL_DEEP_VALID |
646 USB_SET_BESL_DEEP(dcd_config_params.besl_deep);
647
648
649
650
651
652 usb_ext = cdev->req->buf + le16_to_cpu(bos->wTotalLength);
653 bos->bNumDeviceCaps++;
654 le16_add_cpu(&bos->wTotalLength, USB_DT_USB_EXT_CAP_SIZE);
655 usb_ext->bLength = USB_DT_USB_EXT_CAP_SIZE;
656 usb_ext->bDescriptorType = USB_DT_DEVICE_CAPABILITY;
657 usb_ext->bDevCapabilityType = USB_CAP_TYPE_EXT;
658 usb_ext->bmAttributes = cpu_to_le32(USB_LPM_SUPPORT |
659 USB_BESL_SUPPORT | besl);
660
661
662
663
664
665 if (gadget_is_superspeed(cdev->gadget)) {
666 struct usb_ss_cap_descriptor *ss_cap;
667
668 ss_cap = cdev->req->buf + le16_to_cpu(bos->wTotalLength);
669 bos->bNumDeviceCaps++;
670 le16_add_cpu(&bos->wTotalLength, USB_DT_USB_SS_CAP_SIZE);
671 ss_cap->bLength = USB_DT_USB_SS_CAP_SIZE;
672 ss_cap->bDescriptorType = USB_DT_DEVICE_CAPABILITY;
673 ss_cap->bDevCapabilityType = USB_SS_CAP_TYPE;
674 ss_cap->bmAttributes = 0;
675 ss_cap->wSpeedSupported = cpu_to_le16(USB_LOW_SPEED_OPERATION |
676 USB_FULL_SPEED_OPERATION |
677 USB_HIGH_SPEED_OPERATION |
678 USB_5GBPS_OPERATION);
679 ss_cap->bFunctionalitySupport = USB_LOW_SPEED_OPERATION;
680 ss_cap->bU1devExitLat = dcd_config_params.bU1devExitLat;
681 ss_cap->bU2DevExitLat = dcd_config_params.bU2DevExitLat;
682 }
683
684
685 if (gadget_is_superspeed_plus(cdev->gadget)) {
686 struct usb_ssp_cap_descriptor *ssp_cap;
687
688 ssp_cap = cdev->req->buf + le16_to_cpu(bos->wTotalLength);
689 bos->bNumDeviceCaps++;
690
691
692
693
694
695 le16_add_cpu(&bos->wTotalLength, USB_DT_USB_SSP_CAP_SIZE(1));
696 ssp_cap->bLength = USB_DT_USB_SSP_CAP_SIZE(1);
697 ssp_cap->bDescriptorType = USB_DT_DEVICE_CAPABILITY;
698 ssp_cap->bDevCapabilityType = USB_SSP_CAP_TYPE;
699 ssp_cap->bReserved = 0;
700 ssp_cap->wReserved = 0;
701
702
703 ssp_cap->bmAttributes = cpu_to_le32(1);
704
705
706 ssp_cap->wFunctionalitySupport =
707 cpu_to_le16((1 << 8) | (1 << 12));
708
709
710
711
712
713
714
715
716 ssp_cap->bmSublinkSpeedAttr[0] =
717 cpu_to_le32((3 << 4) | (1 << 14) | (0xa << 16));
718
719
720
721
722
723
724
725 ssp_cap->bmSublinkSpeedAttr[1] =
726 cpu_to_le32((3 << 4) | (1 << 14) |
727 (0xa << 16) | (1 << 7));
728 }
729
730 return le16_to_cpu(bos->wTotalLength);
731}
732
733static void device_qual(struct usb_composite_dev *cdev)
734{
735 struct usb_qualifier_descriptor *qual = cdev->req->buf;
736
737 qual->bLength = sizeof(*qual);
738 qual->bDescriptorType = USB_DT_DEVICE_QUALIFIER;
739
740 qual->bcdUSB = cdev->desc.bcdUSB;
741 qual->bDeviceClass = cdev->desc.bDeviceClass;
742 qual->bDeviceSubClass = cdev->desc.bDeviceSubClass;
743 qual->bDeviceProtocol = cdev->desc.bDeviceProtocol;
744
745 qual->bMaxPacketSize0 = cdev->gadget->ep0->maxpacket;
746 qual->bNumConfigurations = count_configs(cdev, USB_DT_DEVICE_QUALIFIER);
747 qual->bRESERVED = 0;
748}
749
750
751
752static void reset_config(struct usb_composite_dev *cdev)
753{
754 struct usb_function *f;
755
756 DBG(cdev, "reset config\n");
757
758 list_for_each_entry(f, &cdev->config->functions, list) {
759 if (f->disable)
760 f->disable(f);
761
762 bitmap_zero(f->endpoints, 32);
763 }
764 cdev->config = NULL;
765 cdev->delayed_status = 0;
766}
767
768static int set_config(struct usb_composite_dev *cdev,
769 const struct usb_ctrlrequest *ctrl, unsigned number)
770{
771 struct usb_gadget *gadget = cdev->gadget;
772 struct usb_configuration *c = NULL;
773 int result = -EINVAL;
774 unsigned power = gadget_is_otg(gadget) ? 8 : 100;
775 int tmp;
776
777 if (number) {
778 list_for_each_entry(c, &cdev->configs, list) {
779 if (c->bConfigurationValue == number) {
780
781
782
783
784
785 if (cdev->config)
786 reset_config(cdev);
787 result = 0;
788 break;
789 }
790 }
791 if (result < 0)
792 goto done;
793 } else {
794 if (cdev->config)
795 reset_config(cdev);
796 result = 0;
797 }
798
799 DBG(cdev, "%s config #%d: %s\n",
800 usb_speed_string(gadget->speed),
801 number, c ? c->label : "unconfigured");
802
803 if (!c)
804 goto done;
805
806 usb_gadget_set_state(gadget, USB_STATE_CONFIGURED);
807 cdev->config = c;
808
809
810 for (tmp = 0; tmp < MAX_CONFIG_INTERFACES; tmp++) {
811 struct usb_function *f = c->interface[tmp];
812 struct usb_descriptor_header **descriptors;
813
814 if (!f)
815 break;
816
817
818
819
820
821
822
823 descriptors = function_descriptors(f, gadget->speed);
824
825 for (; *descriptors; ++descriptors) {
826 struct usb_endpoint_descriptor *ep;
827 int addr;
828
829 if ((*descriptors)->bDescriptorType != USB_DT_ENDPOINT)
830 continue;
831
832 ep = (struct usb_endpoint_descriptor *)*descriptors;
833 addr = ((ep->bEndpointAddress & 0x80) >> 3)
834 | (ep->bEndpointAddress & 0x0f);
835 set_bit(addr, f->endpoints);
836 }
837
838 result = f->set_alt(f, tmp, 0);
839 if (result < 0) {
840 DBG(cdev, "interface %d (%s/%p) alt 0 --> %d\n",
841 tmp, f->name, f, result);
842
843 reset_config(cdev);
844 goto done;
845 }
846
847 if (result == USB_GADGET_DELAYED_STATUS) {
848 DBG(cdev,
849 "%s: interface %d (%s) requested delayed status\n",
850 __func__, tmp, f->name);
851 cdev->delayed_status++;
852 DBG(cdev, "delayed_status count %d\n",
853 cdev->delayed_status);
854 }
855 }
856
857
858 power = c->MaxPower ? c->MaxPower : CONFIG_USB_GADGET_VBUS_DRAW;
859 if (gadget->speed < USB_SPEED_SUPER)
860 power = min(power, 500U);
861 else
862 power = min(power, 900U);
863done:
864 usb_gadget_vbus_draw(gadget, power);
865 if (result >= 0 && cdev->delayed_status)
866 result = USB_GADGET_DELAYED_STATUS;
867 return result;
868}
869
870int usb_add_config_only(struct usb_composite_dev *cdev,
871 struct usb_configuration *config)
872{
873 struct usb_configuration *c;
874
875 if (!config->bConfigurationValue)
876 return -EINVAL;
877
878
879 list_for_each_entry(c, &cdev->configs, list) {
880 if (c->bConfigurationValue == config->bConfigurationValue)
881 return -EBUSY;
882 }
883
884 config->cdev = cdev;
885 list_add_tail(&config->list, &cdev->configs);
886
887 INIT_LIST_HEAD(&config->functions);
888 config->next_interface_id = 0;
889 memset(config->interface, 0, sizeof(config->interface));
890
891 return 0;
892}
893EXPORT_SYMBOL_GPL(usb_add_config_only);
894
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908
909
910int usb_add_config(struct usb_composite_dev *cdev,
911 struct usb_configuration *config,
912 int (*bind)(struct usb_configuration *))
913{
914 int status = -EINVAL;
915
916 if (!bind)
917 goto done;
918
919 DBG(cdev, "adding config #%u '%s'/%p\n",
920 config->bConfigurationValue,
921 config->label, config);
922
923 status = usb_add_config_only(cdev, config);
924 if (status)
925 goto done;
926
927 status = bind(config);
928 if (status < 0) {
929 while (!list_empty(&config->functions)) {
930 struct usb_function *f;
931
932 f = list_first_entry(&config->functions,
933 struct usb_function, list);
934 list_del(&f->list);
935 if (f->unbind) {
936 DBG(cdev, "unbind function '%s'/%p\n",
937 f->name, f);
938 f->unbind(config, f);
939
940 }
941 }
942 list_del(&config->list);
943 config->cdev = NULL;
944 } else {
945 unsigned i;
946
947 DBG(cdev, "cfg %d/%p speeds:%s%s%s%s\n",
948 config->bConfigurationValue, config,
949 config->superspeed_plus ? " superplus" : "",
950 config->superspeed ? " super" : "",
951 config->highspeed ? " high" : "",
952 config->fullspeed
953 ? (gadget_is_dualspeed(cdev->gadget)
954 ? " full"
955 : " full/low")
956 : "");
957
958 for (i = 0; i < MAX_CONFIG_INTERFACES; i++) {
959 struct usb_function *f = config->interface[i];
960
961 if (!f)
962 continue;
963 DBG(cdev, " interface %d = %s/%p\n",
964 i, f->name, f);
965 }
966 }
967
968
969 usb_ep_autoconfig_reset(cdev->gadget);
970
971done:
972 if (status)
973 DBG(cdev, "added config '%s'/%u --> %d\n", config->label,
974 config->bConfigurationValue, status);
975 return status;
976}
977EXPORT_SYMBOL_GPL(usb_add_config);
978
979static void remove_config(struct usb_composite_dev *cdev,
980 struct usb_configuration *config)
981{
982 while (!list_empty(&config->functions)) {
983 struct usb_function *f;
984
985 f = list_first_entry(&config->functions,
986 struct usb_function, list);
987
988 usb_remove_function(config, f);
989 }
990 list_del(&config->list);
991 if (config->unbind) {
992 DBG(cdev, "unbind config '%s'/%p\n", config->label, config);
993 config->unbind(config);
994
995 }
996}
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007void usb_remove_config(struct usb_composite_dev *cdev,
1008 struct usb_configuration *config)
1009{
1010 unsigned long flags;
1011
1012 spin_lock_irqsave(&cdev->lock, flags);
1013
1014 if (cdev->config == config)
1015 reset_config(cdev);
1016
1017 spin_unlock_irqrestore(&cdev->lock, flags);
1018
1019 remove_config(cdev, config);
1020}
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030static void collect_langs(struct usb_gadget_strings **sp, __le16 *buf)
1031{
1032 const struct usb_gadget_strings *s;
1033 __le16 language;
1034 __le16 *tmp;
1035
1036 while (*sp) {
1037 s = *sp;
1038 language = cpu_to_le16(s->language);
1039 for (tmp = buf; *tmp && tmp < &buf[126]; tmp++) {
1040 if (*tmp == language)
1041 goto repeat;
1042 }
1043 *tmp++ = language;
1044repeat:
1045 sp++;
1046 }
1047}
1048
1049static int lookup_string(
1050 struct usb_gadget_strings **sp,
1051 void *buf,
1052 u16 language,
1053 int id
1054)
1055{
1056 struct usb_gadget_strings *s;
1057 int value;
1058
1059 while (*sp) {
1060 s = *sp++;
1061 if (s->language != language)
1062 continue;
1063 value = usb_gadget_get_string(s, id, buf);
1064 if (value > 0)
1065 return value;
1066 }
1067 return -EINVAL;
1068}
1069
1070static int get_string(struct usb_composite_dev *cdev,
1071 void *buf, u16 language, int id)
1072{
1073 struct usb_composite_driver *composite = cdev->driver;
1074 struct usb_gadget_string_container *uc;
1075 struct usb_configuration *c;
1076 struct usb_function *f;
1077 int len;
1078
1079
1080
1081
1082
1083
1084
1085 if (id == 0) {
1086 struct usb_string_descriptor *s = buf;
1087 struct usb_gadget_strings **sp;
1088
1089 memset(s, 0, 256);
1090 s->bDescriptorType = USB_DT_STRING;
1091
1092 sp = composite->strings;
1093 if (sp)
1094 collect_langs(sp, s->wData);
1095
1096 list_for_each_entry(c, &cdev->configs, list) {
1097 sp = c->strings;
1098 if (sp)
1099 collect_langs(sp, s->wData);
1100
1101 list_for_each_entry(f, &c->functions, list) {
1102 sp = f->strings;
1103 if (sp)
1104 collect_langs(sp, s->wData);
1105 }
1106 }
1107 list_for_each_entry(uc, &cdev->gstrings, list) {
1108 struct usb_gadget_strings **sp;
1109
1110 sp = get_containers_gs(uc);
1111 collect_langs(sp, s->wData);
1112 }
1113
1114 for (len = 0; len <= 126 && s->wData[len]; len++)
1115 continue;
1116 if (!len)
1117 return -EINVAL;
1118
1119 s->bLength = 2 * (len + 1);
1120 return s->bLength;
1121 }
1122
1123 if (cdev->use_os_string && language == 0 && id == OS_STRING_IDX) {
1124 struct usb_os_string *b = buf;
1125 b->bLength = sizeof(*b);
1126 b->bDescriptorType = USB_DT_STRING;
1127 compiletime_assert(
1128 sizeof(b->qwSignature) == sizeof(cdev->qw_sign),
1129 "qwSignature size must be equal to qw_sign");
1130 memcpy(&b->qwSignature, cdev->qw_sign, sizeof(b->qwSignature));
1131 b->bMS_VendorCode = cdev->b_vendor_code;
1132 b->bPad = 0;
1133 return sizeof(*b);
1134 }
1135
1136 list_for_each_entry(uc, &cdev->gstrings, list) {
1137 struct usb_gadget_strings **sp;
1138
1139 sp = get_containers_gs(uc);
1140 len = lookup_string(sp, buf, language, id);
1141 if (len > 0)
1142 return len;
1143 }
1144
1145
1146
1147
1148
1149 if (composite->strings) {
1150 len = lookup_string(composite->strings, buf, language, id);
1151 if (len > 0)
1152 return len;
1153 }
1154 list_for_each_entry(c, &cdev->configs, list) {
1155 if (c->strings) {
1156 len = lookup_string(c->strings, buf, language, id);
1157 if (len > 0)
1158 return len;
1159 }
1160 list_for_each_entry(f, &c->functions, list) {
1161 if (!f->strings)
1162 continue;
1163 len = lookup_string(f->strings, buf, language, id);
1164 if (len > 0)
1165 return len;
1166 }
1167 }
1168 return -EINVAL;
1169}
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185int usb_string_id(struct usb_composite_dev *cdev)
1186{
1187 if (cdev->next_string_id < 254) {
1188
1189
1190
1191 cdev->next_string_id++;
1192 return cdev->next_string_id;
1193 }
1194 return -ENODEV;
1195}
1196EXPORT_SYMBOL_GPL(usb_string_id);
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214int usb_string_ids_tab(struct usb_composite_dev *cdev, struct usb_string *str)
1215{
1216 int next = cdev->next_string_id;
1217
1218 for (; str->s; ++str) {
1219 if (unlikely(next >= 254))
1220 return -ENODEV;
1221 str->id = ++next;
1222 }
1223
1224 cdev->next_string_id = next;
1225
1226 return 0;
1227}
1228EXPORT_SYMBOL_GPL(usb_string_ids_tab);
1229
1230static struct usb_gadget_string_container *copy_gadget_strings(
1231 struct usb_gadget_strings **sp, unsigned n_gstrings,
1232 unsigned n_strings)
1233{
1234 struct usb_gadget_string_container *uc;
1235 struct usb_gadget_strings **gs_array;
1236 struct usb_gadget_strings *gs;
1237 struct usb_string *s;
1238 unsigned mem;
1239 unsigned n_gs;
1240 unsigned n_s;
1241 void *stash;
1242
1243 mem = sizeof(*uc);
1244 mem += sizeof(void *) * (n_gstrings + 1);
1245 mem += sizeof(struct usb_gadget_strings) * n_gstrings;
1246 mem += sizeof(struct usb_string) * (n_strings + 1) * (n_gstrings);
1247 uc = kmalloc(mem, GFP_KERNEL);
1248 if (!uc)
1249 return ERR_PTR(-ENOMEM);
1250 gs_array = get_containers_gs(uc);
1251 stash = uc->stash;
1252 stash += sizeof(void *) * (n_gstrings + 1);
1253 for (n_gs = 0; n_gs < n_gstrings; n_gs++) {
1254 struct usb_string *org_s;
1255
1256 gs_array[n_gs] = stash;
1257 gs = gs_array[n_gs];
1258 stash += sizeof(struct usb_gadget_strings);
1259 gs->language = sp[n_gs]->language;
1260 gs->strings = stash;
1261 org_s = sp[n_gs]->strings;
1262
1263 for (n_s = 0; n_s < n_strings; n_s++) {
1264 s = stash;
1265 stash += sizeof(struct usb_string);
1266 if (org_s->s)
1267 s->s = org_s->s;
1268 else
1269 s->s = "";
1270 org_s++;
1271 }
1272 s = stash;
1273 s->s = NULL;
1274 stash += sizeof(struct usb_string);
1275
1276 }
1277 gs_array[n_gs] = NULL;
1278 return uc;
1279}
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298struct usb_string *usb_gstrings_attach(struct usb_composite_dev *cdev,
1299 struct usb_gadget_strings **sp, unsigned n_strings)
1300{
1301 struct usb_gadget_string_container *uc;
1302 struct usb_gadget_strings **n_gs;
1303 unsigned n_gstrings = 0;
1304 unsigned i;
1305 int ret;
1306
1307 for (i = 0; sp[i]; i++)
1308 n_gstrings++;
1309
1310 if (!n_gstrings)
1311 return ERR_PTR(-EINVAL);
1312
1313 uc = copy_gadget_strings(sp, n_gstrings, n_strings);
1314 if (IS_ERR(uc))
1315 return ERR_CAST(uc);
1316
1317 n_gs = get_containers_gs(uc);
1318 ret = usb_string_ids_tab(cdev, n_gs[0]->strings);
1319 if (ret)
1320 goto err;
1321
1322 for (i = 1; i < n_gstrings; i++) {
1323 struct usb_string *m_s;
1324 struct usb_string *s;
1325 unsigned n;
1326
1327 m_s = n_gs[0]->strings;
1328 s = n_gs[i]->strings;
1329 for (n = 0; n < n_strings; n++) {
1330 s->id = m_s->id;
1331 s++;
1332 m_s++;
1333 }
1334 }
1335 list_add_tail(&uc->list, &cdev->gstrings);
1336 return n_gs[0]->strings;
1337err:
1338 kfree(uc);
1339 return ERR_PTR(ret);
1340}
1341EXPORT_SYMBOL_GPL(usb_gstrings_attach);
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362int usb_string_ids_n(struct usb_composite_dev *c, unsigned n)
1363{
1364 unsigned next = c->next_string_id;
1365 if (unlikely(n > 254 || (unsigned)next + n > 254))
1366 return -ENODEV;
1367 c->next_string_id += n;
1368 return next + 1;
1369}
1370EXPORT_SYMBOL_GPL(usb_string_ids_n);
1371
1372
1373
1374static void composite_setup_complete(struct usb_ep *ep, struct usb_request *req)
1375{
1376 struct usb_composite_dev *cdev;
1377
1378 if (req->status || req->actual != req->length)
1379 DBG((struct usb_composite_dev *) ep->driver_data,
1380 "setup complete --> %d, %d/%d\n",
1381 req->status, req->actual, req->length);
1382
1383
1384
1385
1386
1387
1388
1389
1390 if (!req->context)
1391 return;
1392
1393 cdev = req->context;
1394
1395 if (cdev->req == req)
1396 cdev->setup_pending = false;
1397 else if (cdev->os_desc_req == req)
1398 cdev->os_desc_pending = false;
1399 else
1400 WARN(1, "unknown request %p\n", req);
1401}
1402
1403static int composite_ep0_queue(struct usb_composite_dev *cdev,
1404 struct usb_request *req, gfp_t gfp_flags)
1405{
1406 int ret;
1407
1408 ret = usb_ep_queue(cdev->gadget->ep0, req, gfp_flags);
1409 if (ret == 0) {
1410 if (cdev->req == req)
1411 cdev->setup_pending = true;
1412 else if (cdev->os_desc_req == req)
1413 cdev->os_desc_pending = true;
1414 else
1415 WARN(1, "unknown request %p\n", req);
1416 }
1417
1418 return ret;
1419}
1420
1421static int count_ext_compat(struct usb_configuration *c)
1422{
1423 int i, res;
1424
1425 res = 0;
1426 for (i = 0; i < c->next_interface_id; ++i) {
1427 struct usb_function *f;
1428 int j;
1429
1430 f = c->interface[i];
1431 for (j = 0; j < f->os_desc_n; ++j) {
1432 struct usb_os_desc *d;
1433
1434 if (i != f->os_desc_table[j].if_id)
1435 continue;
1436 d = f->os_desc_table[j].os_desc;
1437 if (d && d->ext_compat_id)
1438 ++res;
1439 }
1440 }
1441 BUG_ON(res > 255);
1442 return res;
1443}
1444
1445static int fill_ext_compat(struct usb_configuration *c, u8 *buf)
1446{
1447 int i, count;
1448
1449 count = 16;
1450 buf += 16;
1451 for (i = 0; i < c->next_interface_id; ++i) {
1452 struct usb_function *f;
1453 int j;
1454
1455 f = c->interface[i];
1456 for (j = 0; j < f->os_desc_n; ++j) {
1457 struct usb_os_desc *d;
1458
1459 if (i != f->os_desc_table[j].if_id)
1460 continue;
1461 d = f->os_desc_table[j].os_desc;
1462 if (d && d->ext_compat_id) {
1463 *buf++ = i;
1464 *buf++ = 0x01;
1465 memcpy(buf, d->ext_compat_id, 16);
1466 buf += 22;
1467 } else {
1468 ++buf;
1469 *buf = 0x01;
1470 buf += 23;
1471 }
1472 count += 24;
1473 if (count + 24 >= USB_COMP_EP0_OS_DESC_BUFSIZ)
1474 return count;
1475 }
1476 }
1477
1478 return count;
1479}
1480
1481static int count_ext_prop(struct usb_configuration *c, int interface)
1482{
1483 struct usb_function *f;
1484 int j;
1485
1486 f = c->interface[interface];
1487 for (j = 0; j < f->os_desc_n; ++j) {
1488 struct usb_os_desc *d;
1489
1490 if (interface != f->os_desc_table[j].if_id)
1491 continue;
1492 d = f->os_desc_table[j].os_desc;
1493 if (d && d->ext_compat_id)
1494 return d->ext_prop_count;
1495 }
1496 return 0;
1497}
1498
1499static int len_ext_prop(struct usb_configuration *c, int interface)
1500{
1501 struct usb_function *f;
1502 struct usb_os_desc *d;
1503 int j, res;
1504
1505 res = 10;
1506 f = c->interface[interface];
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 return min(res + d->ext_prop_len, 4096);
1513 }
1514 return res;
1515}
1516
1517static int fill_ext_prop(struct usb_configuration *c, int interface, u8 *buf)
1518{
1519 struct usb_function *f;
1520 struct usb_os_desc *d;
1521 struct usb_os_desc_ext_prop *ext_prop;
1522 int j, count, n, ret;
1523
1524 f = c->interface[interface];
1525 count = 10;
1526 buf += 10;
1527 for (j = 0; j < f->os_desc_n; ++j) {
1528 if (interface != f->os_desc_table[j].if_id)
1529 continue;
1530 d = f->os_desc_table[j].os_desc;
1531 if (d)
1532 list_for_each_entry(ext_prop, &d->ext_prop, entry) {
1533 n = ext_prop->data_len +
1534 ext_prop->name_len + 14;
1535 if (count + n >= USB_COMP_EP0_OS_DESC_BUFSIZ)
1536 return count;
1537 usb_ext_prop_put_size(buf, n);
1538 usb_ext_prop_put_type(buf, ext_prop->type);
1539 ret = usb_ext_prop_put_name(buf, ext_prop->name,
1540 ext_prop->name_len);
1541 if (ret < 0)
1542 return ret;
1543 switch (ext_prop->type) {
1544 case USB_EXT_PROP_UNICODE:
1545 case USB_EXT_PROP_UNICODE_ENV:
1546 case USB_EXT_PROP_UNICODE_LINK:
1547 usb_ext_prop_put_unicode(buf, ret,
1548 ext_prop->data,
1549 ext_prop->data_len);
1550 break;
1551 case USB_EXT_PROP_BINARY:
1552 usb_ext_prop_put_binary(buf, ret,
1553 ext_prop->data,
1554 ext_prop->data_len);
1555 break;
1556 case USB_EXT_PROP_LE32:
1557
1558 case USB_EXT_PROP_BE32:
1559
1560 default:
1561 return -EINVAL;
1562 }
1563 buf += n;
1564 count += n;
1565 }
1566 }
1567
1568 return count;
1569}
1570
1571
1572
1573
1574
1575
1576
1577
1578int
1579composite_setup(struct usb_gadget *gadget, const struct usb_ctrlrequest *ctrl)
1580{
1581 struct usb_composite_dev *cdev = get_gadget_data(gadget);
1582 struct usb_request *req = cdev->req;
1583 int value = -EOPNOTSUPP;
1584 int status = 0;
1585 u16 w_index = le16_to_cpu(ctrl->wIndex);
1586 u8 intf = w_index & 0xFF;
1587 u16 w_value = le16_to_cpu(ctrl->wValue);
1588 u16 w_length = le16_to_cpu(ctrl->wLength);
1589 struct usb_function *f = NULL;
1590 u8 endp;
1591
1592
1593
1594
1595
1596 req->zero = 0;
1597 req->context = cdev;
1598 req->complete = composite_setup_complete;
1599 req->length = 0;
1600 gadget->ep0->driver_data = cdev;
1601
1602
1603
1604
1605
1606 if ((ctrl->bRequestType & USB_TYPE_MASK) != USB_TYPE_STANDARD)
1607 goto unknown;
1608
1609 switch (ctrl->bRequest) {
1610
1611
1612 case USB_REQ_GET_DESCRIPTOR:
1613 if (ctrl->bRequestType != USB_DIR_IN)
1614 goto unknown;
1615 switch (w_value >> 8) {
1616
1617 case USB_DT_DEVICE:
1618 cdev->desc.bNumConfigurations =
1619 count_configs(cdev, USB_DT_DEVICE);
1620 cdev->desc.bMaxPacketSize0 =
1621 cdev->gadget->ep0->maxpacket;
1622 if (gadget_is_superspeed(gadget)) {
1623 if (gadget->speed >= USB_SPEED_SUPER) {
1624 cdev->desc.bcdUSB = cpu_to_le16(0x0320);
1625 cdev->desc.bMaxPacketSize0 = 9;
1626 } else {
1627 cdev->desc.bcdUSB = cpu_to_le16(0x0210);
1628 }
1629 } else {
1630 if (gadget->lpm_capable)
1631 cdev->desc.bcdUSB = cpu_to_le16(0x0201);
1632 else
1633 cdev->desc.bcdUSB = cpu_to_le16(0x0200);
1634 }
1635
1636 value = min(w_length, (u16) sizeof cdev->desc);
1637 memcpy(req->buf, &cdev->desc, value);
1638 break;
1639 case USB_DT_DEVICE_QUALIFIER:
1640 if (!gadget_is_dualspeed(gadget) ||
1641 gadget->speed >= USB_SPEED_SUPER)
1642 break;
1643 device_qual(cdev);
1644 value = min_t(int, w_length,
1645 sizeof(struct usb_qualifier_descriptor));
1646 break;
1647 case USB_DT_OTHER_SPEED_CONFIG:
1648 if (!gadget_is_dualspeed(gadget) ||
1649 gadget->speed >= USB_SPEED_SUPER)
1650 break;
1651
1652 case USB_DT_CONFIG:
1653 value = config_desc(cdev, w_value);
1654 if (value >= 0)
1655 value = min(w_length, (u16) value);
1656 break;
1657 case USB_DT_STRING:
1658 value = get_string(cdev, req->buf,
1659 w_index, w_value & 0xff);
1660 if (value >= 0)
1661 value = min(w_length, (u16) value);
1662 break;
1663 case USB_DT_BOS:
1664 if (gadget_is_superspeed(gadget) ||
1665 gadget->lpm_capable) {
1666 value = bos_desc(cdev);
1667 value = min(w_length, (u16) value);
1668 }
1669 break;
1670 case USB_DT_OTG:
1671 if (gadget_is_otg(gadget)) {
1672 struct usb_configuration *config;
1673 int otg_desc_len = 0;
1674
1675 if (cdev->config)
1676 config = cdev->config;
1677 else
1678 config = list_first_entry(
1679 &cdev->configs,
1680 struct usb_configuration, list);
1681 if (!config)
1682 goto done;
1683
1684 if (gadget->otg_caps &&
1685 (gadget->otg_caps->otg_rev >= 0x0200))
1686 otg_desc_len += sizeof(
1687 struct usb_otg20_descriptor);
1688 else
1689 otg_desc_len += sizeof(
1690 struct usb_otg_descriptor);
1691
1692 value = min_t(int, w_length, otg_desc_len);
1693 memcpy(req->buf, config->descriptors[0], value);
1694 }
1695 break;
1696 }
1697 break;
1698
1699
1700 case USB_REQ_SET_CONFIGURATION:
1701 if (ctrl->bRequestType != 0)
1702 goto unknown;
1703 if (gadget_is_otg(gadget)) {
1704 if (gadget->a_hnp_support)
1705 DBG(cdev, "HNP available\n");
1706 else if (gadget->a_alt_hnp_support)
1707 DBG(cdev, "HNP on another port\n");
1708 else
1709 VDBG(cdev, "HNP inactive\n");
1710 }
1711 spin_lock(&cdev->lock);
1712 value = set_config(cdev, ctrl, w_value);
1713 spin_unlock(&cdev->lock);
1714 break;
1715 case USB_REQ_GET_CONFIGURATION:
1716 if (ctrl->bRequestType != USB_DIR_IN)
1717 goto unknown;
1718 if (cdev->config)
1719 *(u8 *)req->buf = cdev->config->bConfigurationValue;
1720 else
1721 *(u8 *)req->buf = 0;
1722 value = min(w_length, (u16) 1);
1723 break;
1724
1725
1726 case USB_REQ_SET_INTERFACE:
1727 if (ctrl->bRequestType != USB_RECIP_INTERFACE)
1728 goto unknown;
1729 if (!cdev->config || intf >= MAX_CONFIG_INTERFACES)
1730 break;
1731 f = cdev->config->interface[intf];
1732 if (!f)
1733 break;
1734
1735
1736
1737
1738
1739
1740 if (w_value && !f->get_alt)
1741 break;
1742
1743 spin_lock(&cdev->lock);
1744 value = f->set_alt(f, w_index, w_value);
1745 if (value == USB_GADGET_DELAYED_STATUS) {
1746 DBG(cdev,
1747 "%s: interface %d (%s) requested delayed status\n",
1748 __func__, intf, f->name);
1749 cdev->delayed_status++;
1750 DBG(cdev, "delayed_status count %d\n",
1751 cdev->delayed_status);
1752 }
1753 spin_unlock(&cdev->lock);
1754 break;
1755 case USB_REQ_GET_INTERFACE:
1756 if (ctrl->bRequestType != (USB_DIR_IN|USB_RECIP_INTERFACE))
1757 goto unknown;
1758 if (!cdev->config || intf >= MAX_CONFIG_INTERFACES)
1759 break;
1760 f = cdev->config->interface[intf];
1761 if (!f)
1762 break;
1763
1764 value = f->get_alt ? f->get_alt(f, w_index) : 0;
1765 if (value < 0)
1766 break;
1767 *((u8 *)req->buf) = value;
1768 value = min(w_length, (u16) 1);
1769 break;
1770 case USB_REQ_GET_STATUS:
1771 if (gadget_is_otg(gadget) && gadget->hnp_polling_support &&
1772 (w_index == OTG_STS_SELECTOR)) {
1773 if (ctrl->bRequestType != (USB_DIR_IN |
1774 USB_RECIP_DEVICE))
1775 goto unknown;
1776 *((u8 *)req->buf) = gadget->host_request_flag;
1777 value = 1;
1778 break;
1779 }
1780
1781
1782
1783
1784
1785
1786
1787
1788 if (!gadget_is_superspeed(gadget))
1789 goto unknown;
1790 if (ctrl->bRequestType != (USB_DIR_IN | USB_RECIP_INTERFACE))
1791 goto unknown;
1792 value = 2;
1793 put_unaligned_le16(0, req->buf);
1794 if (!cdev->config || intf >= MAX_CONFIG_INTERFACES)
1795 break;
1796 f = cdev->config->interface[intf];
1797 if (!f)
1798 break;
1799 status = f->get_status ? f->get_status(f) : 0;
1800 if (status < 0)
1801 break;
1802 put_unaligned_le16(status & 0x0000ffff, req->buf);
1803 break;
1804
1805
1806
1807
1808
1809 case USB_REQ_CLEAR_FEATURE:
1810 case USB_REQ_SET_FEATURE:
1811 if (!gadget_is_superspeed(gadget))
1812 goto unknown;
1813 if (ctrl->bRequestType != (USB_DIR_OUT | USB_RECIP_INTERFACE))
1814 goto unknown;
1815 switch (w_value) {
1816 case USB_INTRF_FUNC_SUSPEND:
1817 if (!cdev->config || intf >= MAX_CONFIG_INTERFACES)
1818 break;
1819 f = cdev->config->interface[intf];
1820 if (!f)
1821 break;
1822 value = 0;
1823 if (f->func_suspend)
1824 value = f->func_suspend(f, w_index >> 8);
1825 if (value < 0) {
1826 ERROR(cdev,
1827 "func_suspend() returned error %d\n",
1828 value);
1829 value = 0;
1830 }
1831 break;
1832 }
1833 break;
1834 default:
1835unknown:
1836
1837
1838
1839 if (cdev->use_os_string && cdev->os_desc_config &&
1840 (ctrl->bRequestType & USB_TYPE_VENDOR) &&
1841 ctrl->bRequest == cdev->b_vendor_code) {
1842 struct usb_configuration *os_desc_cfg;
1843 u8 *buf;
1844 int interface;
1845 int count = 0;
1846
1847 req = cdev->os_desc_req;
1848 req->context = cdev;
1849 req->complete = composite_setup_complete;
1850 buf = req->buf;
1851 os_desc_cfg = cdev->os_desc_config;
1852 w_length = min_t(u16, w_length, USB_COMP_EP0_OS_DESC_BUFSIZ);
1853 memset(buf, 0, w_length);
1854 buf[5] = 0x01;
1855 switch (ctrl->bRequestType & USB_RECIP_MASK) {
1856 case USB_RECIP_DEVICE:
1857 if (w_index != 0x4 || (w_value >> 8))
1858 break;
1859 buf[6] = w_index;
1860
1861 count = count_ext_compat(os_desc_cfg);
1862 buf[8] = count;
1863 count *= 24;
1864 count += 16;
1865 put_unaligned_le32(count, buf);
1866 value = w_length;
1867 if (w_length > 0x10) {
1868 value = fill_ext_compat(os_desc_cfg, buf);
1869 value = min_t(u16, w_length, value);
1870 }
1871 break;
1872 case USB_RECIP_INTERFACE:
1873 if (w_index != 0x5 || (w_value >> 8))
1874 break;
1875 interface = w_value & 0xFF;
1876 buf[6] = w_index;
1877 count = count_ext_prop(os_desc_cfg,
1878 interface);
1879 put_unaligned_le16(count, buf + 8);
1880 count = len_ext_prop(os_desc_cfg,
1881 interface);
1882 put_unaligned_le32(count, buf);
1883 value = w_length;
1884 if (w_length > 0x0A) {
1885 value = fill_ext_prop(os_desc_cfg,
1886 interface, buf);
1887 if (value >= 0)
1888 value = min_t(u16, w_length, value);
1889 }
1890 break;
1891 }
1892
1893 goto check_value;
1894 }
1895
1896 VDBG(cdev,
1897 "non-core control req%02x.%02x v%04x i%04x l%d\n",
1898 ctrl->bRequestType, ctrl->bRequest,
1899 w_value, w_index, w_length);
1900
1901
1902
1903
1904
1905 if (cdev->config) {
1906 list_for_each_entry(f, &cdev->config->functions, list)
1907 if (f->req_match &&
1908 f->req_match(f, ctrl, false))
1909 goto try_fun_setup;
1910 } else {
1911 struct usb_configuration *c;
1912 list_for_each_entry(c, &cdev->configs, list)
1913 list_for_each_entry(f, &c->functions, list)
1914 if (f->req_match &&
1915 f->req_match(f, ctrl, true))
1916 goto try_fun_setup;
1917 }
1918 f = NULL;
1919
1920 switch (ctrl->bRequestType & USB_RECIP_MASK) {
1921 case USB_RECIP_INTERFACE:
1922 if (!cdev->config || intf >= MAX_CONFIG_INTERFACES)
1923 break;
1924 f = cdev->config->interface[intf];
1925 break;
1926
1927 case USB_RECIP_ENDPOINT:
1928 if (!cdev->config)
1929 break;
1930 endp = ((w_index & 0x80) >> 3) | (w_index & 0x0f);
1931 list_for_each_entry(f, &cdev->config->functions, list) {
1932 if (test_bit(endp, f->endpoints))
1933 break;
1934 }
1935 if (&f->list == &cdev->config->functions)
1936 f = NULL;
1937 break;
1938 }
1939try_fun_setup:
1940 if (f && f->setup)
1941 value = f->setup(f, ctrl);
1942 else {
1943 struct usb_configuration *c;
1944
1945 c = cdev->config;
1946 if (!c)
1947 goto done;
1948
1949
1950 if (c->setup) {
1951 value = c->setup(c, ctrl);
1952 goto done;
1953 }
1954
1955
1956 if (!list_is_singular(&c->functions))
1957 goto done;
1958 f = list_first_entry(&c->functions, struct usb_function,
1959 list);
1960 if (f->setup)
1961 value = f->setup(f, ctrl);
1962 }
1963
1964 goto done;
1965 }
1966
1967check_value:
1968
1969 if (value >= 0 && value != USB_GADGET_DELAYED_STATUS) {
1970 req->length = value;
1971 req->context = cdev;
1972 req->zero = value < w_length;
1973 value = composite_ep0_queue(cdev, req, GFP_ATOMIC);
1974 if (value < 0) {
1975 DBG(cdev, "ep_queue --> %d\n", value);
1976 req->status = 0;
1977 composite_setup_complete(gadget->ep0, req);
1978 }
1979 } else if (value == USB_GADGET_DELAYED_STATUS && w_length != 0) {
1980 WARN(cdev,
1981 "%s: Delayed status not supported for w_length != 0",
1982 __func__);
1983 }
1984
1985done:
1986
1987 return value;
1988}
1989
1990void composite_disconnect(struct usb_gadget *gadget)
1991{
1992 struct usb_composite_dev *cdev = get_gadget_data(gadget);
1993 unsigned long flags;
1994
1995
1996
1997
1998 spin_lock_irqsave(&cdev->lock, flags);
1999 cdev->suspended = 0;
2000 if (cdev->config)
2001 reset_config(cdev);
2002 if (cdev->driver->disconnect)
2003 cdev->driver->disconnect(cdev);
2004 spin_unlock_irqrestore(&cdev->lock, flags);
2005}
2006
2007
2008
2009static ssize_t suspended_show(struct device *dev, struct device_attribute *attr,
2010 char *buf)
2011{
2012 struct usb_gadget *gadget = dev_to_usb_gadget(dev);
2013 struct usb_composite_dev *cdev = get_gadget_data(gadget);
2014
2015 return sprintf(buf, "%d\n", cdev->suspended);
2016}
2017static DEVICE_ATTR_RO(suspended);
2018
2019static void __composite_unbind(struct usb_gadget *gadget, bool unbind_driver)
2020{
2021 struct usb_composite_dev *cdev = get_gadget_data(gadget);
2022 struct usb_gadget_strings *gstr = cdev->driver->strings[0];
2023 struct usb_string *dev_str = gstr->strings;
2024
2025
2026
2027
2028
2029
2030 WARN_ON(cdev->config);
2031
2032 while (!list_empty(&cdev->configs)) {
2033 struct usb_configuration *c;
2034 c = list_first_entry(&cdev->configs,
2035 struct usb_configuration, list);
2036 remove_config(cdev, c);
2037 }
2038 if (cdev->driver->unbind && unbind_driver)
2039 cdev->driver->unbind(cdev);
2040
2041 composite_dev_cleanup(cdev);
2042
2043 if (dev_str[USB_GADGET_MANUFACTURER_IDX].s == cdev->def_manufacturer)
2044 dev_str[USB_GADGET_MANUFACTURER_IDX].s = "";
2045
2046 kfree(cdev->def_manufacturer);
2047 kfree(cdev);
2048 set_gadget_data(gadget, NULL);
2049}
2050
2051static void composite_unbind(struct usb_gadget *gadget)
2052{
2053 __composite_unbind(gadget, true);
2054}
2055
2056static void update_unchanged_dev_desc(struct usb_device_descriptor *new,
2057 const struct usb_device_descriptor *old)
2058{
2059 __le16 idVendor;
2060 __le16 idProduct;
2061 __le16 bcdDevice;
2062 u8 iSerialNumber;
2063 u8 iManufacturer;
2064 u8 iProduct;
2065
2066
2067
2068
2069
2070 idVendor = new->idVendor;
2071 idProduct = new->idProduct;
2072 bcdDevice = new->bcdDevice;
2073 iSerialNumber = new->iSerialNumber;
2074 iManufacturer = new->iManufacturer;
2075 iProduct = new->iProduct;
2076
2077 *new = *old;
2078 if (idVendor)
2079 new->idVendor = idVendor;
2080 if (idProduct)
2081 new->idProduct = idProduct;
2082 if (bcdDevice)
2083 new->bcdDevice = bcdDevice;
2084 else
2085 new->bcdDevice = cpu_to_le16(get_default_bcdDevice());
2086 if (iSerialNumber)
2087 new->iSerialNumber = iSerialNumber;
2088 if (iManufacturer)
2089 new->iManufacturer = iManufacturer;
2090 if (iProduct)
2091 new->iProduct = iProduct;
2092}
2093
2094int composite_dev_prepare(struct usb_composite_driver *composite,
2095 struct usb_composite_dev *cdev)
2096{
2097 struct usb_gadget *gadget = cdev->gadget;
2098 int ret = -ENOMEM;
2099
2100
2101 cdev->req = usb_ep_alloc_request(gadget->ep0, GFP_KERNEL);
2102 if (!cdev->req)
2103 return -ENOMEM;
2104
2105 cdev->req->buf = kmalloc(USB_COMP_EP0_BUFSIZ, GFP_KERNEL);
2106 if (!cdev->req->buf)
2107 goto fail;
2108
2109 ret = device_create_file(&gadget->dev, &dev_attr_suspended);
2110 if (ret)
2111 goto fail_dev;
2112
2113 cdev->req->complete = composite_setup_complete;
2114 cdev->req->context = cdev;
2115 gadget->ep0->driver_data = cdev;
2116
2117 cdev->driver = composite;
2118
2119
2120
2121
2122
2123
2124 if (CONFIG_USB_GADGET_VBUS_DRAW <= USB_SELF_POWER_VBUS_MAX_DRAW)
2125 usb_gadget_set_selfpowered(gadget);
2126
2127
2128
2129
2130
2131 usb_ep_autoconfig_reset(gadget);
2132 return 0;
2133fail_dev:
2134 kfree(cdev->req->buf);
2135fail:
2136 usb_ep_free_request(gadget->ep0, cdev->req);
2137 cdev->req = NULL;
2138 return ret;
2139}
2140
2141int composite_os_desc_req_prepare(struct usb_composite_dev *cdev,
2142 struct usb_ep *ep0)
2143{
2144 int ret = 0;
2145
2146 cdev->os_desc_req = usb_ep_alloc_request(ep0, GFP_KERNEL);
2147 if (!cdev->os_desc_req) {
2148 ret = -ENOMEM;
2149 goto end;
2150 }
2151
2152 cdev->os_desc_req->buf = kmalloc(USB_COMP_EP0_OS_DESC_BUFSIZ,
2153 GFP_KERNEL);
2154 if (!cdev->os_desc_req->buf) {
2155 ret = -ENOMEM;
2156 usb_ep_free_request(ep0, cdev->os_desc_req);
2157 goto end;
2158 }
2159 cdev->os_desc_req->context = cdev;
2160 cdev->os_desc_req->complete = composite_setup_complete;
2161end:
2162 return ret;
2163}
2164
2165void composite_dev_cleanup(struct usb_composite_dev *cdev)
2166{
2167 struct usb_gadget_string_container *uc, *tmp;
2168 struct usb_ep *ep, *tmp_ep;
2169
2170 list_for_each_entry_safe(uc, tmp, &cdev->gstrings, list) {
2171 list_del(&uc->list);
2172 kfree(uc);
2173 }
2174 if (cdev->os_desc_req) {
2175 if (cdev->os_desc_pending)
2176 usb_ep_dequeue(cdev->gadget->ep0, cdev->os_desc_req);
2177
2178 kfree(cdev->os_desc_req->buf);
2179 cdev->os_desc_req->buf = NULL;
2180 usb_ep_free_request(cdev->gadget->ep0, cdev->os_desc_req);
2181 cdev->os_desc_req = NULL;
2182 }
2183 if (cdev->req) {
2184 if (cdev->setup_pending)
2185 usb_ep_dequeue(cdev->gadget->ep0, cdev->req);
2186
2187 kfree(cdev->req->buf);
2188 cdev->req->buf = NULL;
2189 usb_ep_free_request(cdev->gadget->ep0, cdev->req);
2190 cdev->req = NULL;
2191 }
2192 cdev->next_string_id = 0;
2193 device_remove_file(&cdev->gadget->dev, &dev_attr_suspended);
2194
2195
2196
2197
2198
2199
2200
2201
2202
2203
2204 list_for_each_entry_safe(ep, tmp_ep,
2205 &cdev->gadget->ep_list, ep_list) {
2206 if (ep->ops->dispose)
2207 ep->ops->dispose(ep);
2208 }
2209}
2210
2211static int composite_bind(struct usb_gadget *gadget,
2212 struct usb_gadget_driver *gdriver)
2213{
2214 struct usb_composite_dev *cdev;
2215 struct usb_composite_driver *composite = to_cdriver(gdriver);
2216 int status = -ENOMEM;
2217
2218 cdev = kzalloc(sizeof *cdev, GFP_KERNEL);
2219 if (!cdev)
2220 return status;
2221
2222 spin_lock_init(&cdev->lock);
2223 cdev->gadget = gadget;
2224 set_gadget_data(gadget, cdev);
2225 INIT_LIST_HEAD(&cdev->configs);
2226 INIT_LIST_HEAD(&cdev->gstrings);
2227
2228 status = composite_dev_prepare(composite, cdev);
2229 if (status)
2230 goto fail;
2231
2232
2233
2234
2235
2236 status = composite->bind(cdev);
2237 if (status < 0)
2238 goto fail;
2239
2240 if (cdev->use_os_string) {
2241 status = composite_os_desc_req_prepare(cdev, gadget->ep0);
2242 if (status)
2243 goto fail;
2244 }
2245
2246 update_unchanged_dev_desc(&cdev->desc, composite->dev);
2247
2248
2249 if (composite->needs_serial && !cdev->desc.iSerialNumber)
2250 WARNING(cdev, "userspace failed to provide iSerialNumber\n");
2251
2252 INFO(cdev, "%s ready\n", composite->name);
2253 return 0;
2254
2255fail:
2256 __composite_unbind(gadget, false);
2257 return status;
2258}
2259
2260
2261
2262void composite_suspend(struct usb_gadget *gadget)
2263{
2264 struct usb_composite_dev *cdev = get_gadget_data(gadget);
2265 struct usb_function *f;
2266
2267
2268
2269
2270 DBG(cdev, "suspend\n");
2271 if (cdev->config) {
2272 list_for_each_entry(f, &cdev->config->functions, list) {
2273 if (f->suspend)
2274 f->suspend(f);
2275 }
2276 }
2277 if (cdev->driver->suspend)
2278 cdev->driver->suspend(cdev);
2279
2280 cdev->suspended = 1;
2281
2282 usb_gadget_vbus_draw(gadget, 2);
2283}
2284
2285void composite_resume(struct usb_gadget *gadget)
2286{
2287 struct usb_composite_dev *cdev = get_gadget_data(gadget);
2288 struct usb_function *f;
2289 unsigned maxpower;
2290
2291
2292
2293
2294 DBG(cdev, "resume\n");
2295 if (cdev->driver->resume)
2296 cdev->driver->resume(cdev);
2297 if (cdev->config) {
2298 list_for_each_entry(f, &cdev->config->functions, list) {
2299 if (f->resume)
2300 f->resume(f);
2301 }
2302
2303 maxpower = cdev->config->MaxPower ?
2304 cdev->config->MaxPower : CONFIG_USB_GADGET_VBUS_DRAW;
2305 if (gadget->speed < USB_SPEED_SUPER)
2306 maxpower = min(maxpower, 500U);
2307 else
2308 maxpower = min(maxpower, 900U);
2309
2310 usb_gadget_vbus_draw(gadget, maxpower);
2311 }
2312
2313 cdev->suspended = 0;
2314}
2315
2316
2317
2318static const struct usb_gadget_driver composite_driver_template = {
2319 .bind = composite_bind,
2320 .unbind = composite_unbind,
2321
2322 .setup = composite_setup,
2323 .reset = composite_disconnect,
2324 .disconnect = composite_disconnect,
2325
2326 .suspend = composite_suspend,
2327 .resume = composite_resume,
2328
2329 .driver = {
2330 .owner = THIS_MODULE,
2331 },
2332};
2333
2334
2335
2336
2337
2338
2339
2340
2341
2342
2343
2344
2345
2346
2347
2348
2349
2350int usb_composite_probe(struct usb_composite_driver *driver)
2351{
2352 struct usb_gadget_driver *gadget_driver;
2353
2354 if (!driver || !driver->dev || !driver->bind)
2355 return -EINVAL;
2356
2357 if (!driver->name)
2358 driver->name = "composite";
2359
2360 driver->gadget_driver = composite_driver_template;
2361 gadget_driver = &driver->gadget_driver;
2362
2363 gadget_driver->function = (char *) driver->name;
2364 gadget_driver->driver.name = driver->name;
2365 gadget_driver->max_speed = driver->max_speed;
2366
2367 return usb_gadget_probe_driver(gadget_driver);
2368}
2369EXPORT_SYMBOL_GPL(usb_composite_probe);
2370
2371
2372
2373
2374
2375
2376
2377
2378void usb_composite_unregister(struct usb_composite_driver *driver)
2379{
2380 usb_gadget_unregister_driver(&driver->gadget_driver);
2381}
2382EXPORT_SYMBOL_GPL(usb_composite_unregister);
2383
2384
2385
2386
2387
2388
2389
2390
2391
2392
2393
2394void usb_composite_setup_continue(struct usb_composite_dev *cdev)
2395{
2396 int value;
2397 struct usb_request *req = cdev->req;
2398 unsigned long flags;
2399
2400 DBG(cdev, "%s\n", __func__);
2401 spin_lock_irqsave(&cdev->lock, flags);
2402
2403 if (cdev->delayed_status == 0) {
2404 WARN(cdev, "%s: Unexpected call\n", __func__);
2405
2406 } else if (--cdev->delayed_status == 0) {
2407 DBG(cdev, "%s: Completing delayed status\n", __func__);
2408 req->length = 0;
2409 req->context = cdev;
2410 value = composite_ep0_queue(cdev, req, GFP_ATOMIC);
2411 if (value < 0) {
2412 DBG(cdev, "ep_queue --> %d\n", value);
2413 req->status = 0;
2414 composite_setup_complete(cdev->gadget->ep0, req);
2415 }
2416 }
2417
2418 spin_unlock_irqrestore(&cdev->lock, flags);
2419}
2420EXPORT_SYMBOL_GPL(usb_composite_setup_continue);
2421
2422static char *composite_default_mfr(struct usb_gadget *gadget)
2423{
2424 return kasprintf(GFP_KERNEL, "%s %s with %s", init_utsname()->sysname,
2425 init_utsname()->release, gadget->name);
2426}
2427
2428void usb_composite_overwrite_options(struct usb_composite_dev *cdev,
2429 struct usb_composite_overwrite *covr)
2430{
2431 struct usb_device_descriptor *desc = &cdev->desc;
2432 struct usb_gadget_strings *gstr = cdev->driver->strings[0];
2433 struct usb_string *dev_str = gstr->strings;
2434
2435 if (covr->idVendor)
2436 desc->idVendor = cpu_to_le16(covr->idVendor);
2437
2438 if (covr->idProduct)
2439 desc->idProduct = cpu_to_le16(covr->idProduct);
2440
2441 if (covr->bcdDevice)
2442 desc->bcdDevice = cpu_to_le16(covr->bcdDevice);
2443
2444 if (covr->serial_number) {
2445 desc->iSerialNumber = dev_str[USB_GADGET_SERIAL_IDX].id;
2446 dev_str[USB_GADGET_SERIAL_IDX].s = covr->serial_number;
2447 }
2448 if (covr->manufacturer) {
2449 desc->iManufacturer = dev_str[USB_GADGET_MANUFACTURER_IDX].id;
2450 dev_str[USB_GADGET_MANUFACTURER_IDX].s = covr->manufacturer;
2451
2452 } else if (!strlen(dev_str[USB_GADGET_MANUFACTURER_IDX].s)) {
2453 desc->iManufacturer = dev_str[USB_GADGET_MANUFACTURER_IDX].id;
2454 cdev->def_manufacturer = composite_default_mfr(cdev->gadget);
2455 dev_str[USB_GADGET_MANUFACTURER_IDX].s = cdev->def_manufacturer;
2456 }
2457
2458 if (covr->product) {
2459 desc->iProduct = dev_str[USB_GADGET_PRODUCT_IDX].id;
2460 dev_str[USB_GADGET_PRODUCT_IDX].s = covr->product;
2461 }
2462}
2463EXPORT_SYMBOL_GPL(usb_composite_overwrite_options);
2464
2465MODULE_LICENSE("GPL");
2466MODULE_AUTHOR("David Brownell");
2467