1 /*-
2  * SPDX-License-Identifier: BSD-2-Clause
4  * Copyright (c) 2008-2020 Hans Petter Selasky. All rights reserved.
50 #include <dev/usb/usb.h>
51 #include <dev/usb/usbdi.h>
52 #include <dev/usb/usbdi_util.h>
56 #include <dev/usb/usb_core.h>
57 #include <dev/usb/usb_debug.h>
60 /*------------------------------------------------------------------------*
63  * This function is the safe way to iterate across the USB config
71  *------------------------------------------------------------------------*/
87 	end = start + UGETW(cd->wTotalLength);  in usb_desc_foreach()
90 	/* Get start of next USB descriptor. */  in usb_desc_foreach()
96 	/* Check that the next USB descriptor is within the range. */  in usb_desc_foreach()
100 	/* Check that the second next USB descriptor is within range. */  in usb_desc_foreach()
113 /*------------------------------------------------------------------------*
122  *   Else: A valid interface descriptor
123  *------------------------------------------------------------------------*/
132 	id = (struct usb_interface_descriptor *)ps->desc;  in usb_idesc_foreach()
141 		if ((id->bDescriptorType == UDESC_INTERFACE) &&  in usb_idesc_foreach()
142 		    (id->bLength >= sizeof(*id))) {  in usb_idesc_foreach()
143 			if (ps->iface_no_last == id->bInterfaceNumber) {  in usb_idesc_foreach()
147 				 * alternate index which is a 8-bit  in usb_idesc_foreach()
150 				if (ps->iface_index_alt == 255) {  in usb_idesc_foreach()
152 					    id->bInterfaceNumber);  in usb_idesc_foreach()
157 			ps->iface_no_last = id->bInterfaceNumber;  in usb_idesc_foreach()
162 	if (ps->desc == NULL) {  in usb_idesc_foreach()
166 		ps->iface_index ++;  in usb_idesc_foreach()
167 		ps->iface_index_alt = 0;  in usb_idesc_foreach()
170 		ps->iface_index_alt ++;  in usb_idesc_foreach()
176 	if (ps->iface_index >= USB_IFACE_MAX) {  in usb_idesc_foreach()
182 	ps->desc = (struct usb_descriptor *)id;  in usb_idesc_foreach()
186 /*------------------------------------------------------------------------*
191  * be a valid interface descriptor.
195  *   Else: A valid endpoint descriptor
196  *------------------------------------------------------------------------*/
206 		if (desc->bDescriptorType == UDESC_INTERFACE) {  in usb_edesc_foreach()
209 		if (desc->bDescriptorType == UDESC_ENDPOINT) {  in usb_edesc_foreach()
210 			if (desc->bLength < sizeof(*ped)) {  in usb_edesc_foreach()
220 /*------------------------------------------------------------------------*
225  * value for the "ped" argument should be a valid endpoint companion
230  *   Else: A valid endpoint companion descriptor
231  *------------------------------------------------------------------------*/
241 		if (desc->bDescriptorType == UDESC_INTERFACE)  in usb_ed_comp_foreach()
243 		if (desc->bDescriptorType == UDESC_ENDPOINT)  in usb_ed_comp_foreach()
245 		if (desc->bDescriptorType == UDESC_ENDPOINT_SS_COMP) {  in usb_ed_comp_foreach()
246 			if (desc->bLength < sizeof(*ped)) {  in usb_ed_comp_foreach()
256 /*------------------------------------------------------------------------*
261  *------------------------------------------------------------------------*/
269 		if (desc->bDescriptorType == type) {  in usbd_get_no_descriptors()
278 /*------------------------------------------------------------------------*
283  *   pointer. If the USB descriptor is corrupt, the returned value can
285  *------------------------------------------------------------------------*/
300 	ifaceno = id->bInterfaceNumber;  in usbd_get_no_alts()
302 	/* Iterate all the USB descriptors */  in usbd_get_no_alts()
306 		if ((desc->bDescriptorType == UDESC_INTERFACE) &&  in usbd_get_no_alts()
307 		    (desc->bLength >= sizeof(*id))) {  in usbd_get_no_alts()
309 			if (id->bInterfaceNumber == ifaceno) {  in usbd_get_no_alts()