3 * Copyright (c) 1998 The NetBSD Foundation, Inc. All rights reserved.
4 * Copyright (c) 1998 Lennart Augustsson. All rights reserved.
5 * Copyright (c) 2008 Hans Petter Selasky. All rights reserved.
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 #include <sys/stdint.h>
30 #include <sys/stddef.h>
31 #include <sys/param.h>
32 #include <sys/queue.h>
33 #include <sys/types.h>
34 #include <sys/systm.h>
35 #include <sys/kernel.h>
37 #include <sys/linker_set.h>
38 #include <sys/module.h>
40 #include <sys/mutex.h>
41 #include <sys/condvar.h>
42 #include <sys/sysctl.h>
44 #include <sys/unistd.h>
45 #include <sys/callout.h>
46 #include <sys/malloc.h>
49 #include <dev/usb/usb.h>
50 #include <dev/usb/usbdi.h>
51 #include <dev/usb/usbdi_util.h>
52 #include <dev/usb/usb_ioctl.h>
53 #include <dev/usb/usbhid.h>
55 #define USB_DEBUG_VAR usb_debug
57 #include <dev/usb/usb_core.h>
58 #include <dev/usb/usb_busdma.h>
59 #include <dev/usb/usb_request.h>
60 #include <dev/usb/usb_process.h>
61 #include <dev/usb/usb_transfer.h>
62 #include <dev/usb/usb_debug.h>
63 #include <dev/usb/usb_device.h>
64 #include <dev/usb/usb_util.h>
65 #include <dev/usb/usb_dynamic.h>
67 #include <dev/usb/usb_controller.h>
68 #include <dev/usb/usb_bus.h>
69 #include <sys/ctype.h>
72 static int usb_pr_poll_delay = USB_PORT_RESET_DELAY;
73 static int usb_pr_recovery_delay = USB_PORT_RESET_RECOVERY;
75 SYSCTL_INT(_hw_usb, OID_AUTO, pr_poll_delay, CTLFLAG_RW,
76 &usb_pr_poll_delay, 0, "USB port reset poll delay in ms");
77 SYSCTL_INT(_hw_usb, OID_AUTO, pr_recovery_delay, CTLFLAG_RW,
78 &usb_pr_recovery_delay, 0, "USB port reset recovery delay in ms");
81 /* The following structures are used in connection to fault injection. */
82 struct usb_ctrl_debug {
83 int bus_index; /* target bus */
84 int dev_index; /* target address */
85 int ds_fail; /* fail data stage */
86 int ss_fail; /* fail data stage */
87 int ds_delay; /* data stage delay in ms */
88 int ss_delay; /* status stage delay in ms */
89 int bmRequestType_value;
93 struct usb_ctrl_debug_bits {
101 /* The default is to disable fault injection. */
103 static struct usb_ctrl_debug usb_ctrl_debug = {
106 .bmRequestType_value = -1,
107 .bRequest_value = -1,
110 SYSCTL_INT(_hw_usb, OID_AUTO, ctrl_bus_fail, CTLFLAG_RW,
111 &usb_ctrl_debug.bus_index, 0, "USB controller index to fail");
112 SYSCTL_INT(_hw_usb, OID_AUTO, ctrl_dev_fail, CTLFLAG_RW,
113 &usb_ctrl_debug.dev_index, 0, "USB device address to fail");
114 SYSCTL_INT(_hw_usb, OID_AUTO, ctrl_ds_fail, CTLFLAG_RW,
115 &usb_ctrl_debug.ds_fail, 0, "USB fail data stage");
116 SYSCTL_INT(_hw_usb, OID_AUTO, ctrl_ss_fail, CTLFLAG_RW,
117 &usb_ctrl_debug.ss_fail, 0, "USB fail status stage");
118 SYSCTL_INT(_hw_usb, OID_AUTO, ctrl_ds_delay, CTLFLAG_RW,
119 &usb_ctrl_debug.ds_delay, 0, "USB data stage delay in ms");
120 SYSCTL_INT(_hw_usb, OID_AUTO, ctrl_ss_delay, CTLFLAG_RW,
121 &usb_ctrl_debug.ss_delay, 0, "USB status stage delay in ms");
122 SYSCTL_INT(_hw_usb, OID_AUTO, ctrl_rt_fail, CTLFLAG_RW,
123 &usb_ctrl_debug.bmRequestType_value, 0, "USB bmRequestType to fail");
124 SYSCTL_INT(_hw_usb, OID_AUTO, ctrl_rv_fail, CTLFLAG_RW,
125 &usb_ctrl_debug.bRequest_value, 0, "USB bRequest to fail");
127 /*------------------------------------------------------------------------*
128 * usbd_get_debug_bits
130 * This function is only useful in USB host mode.
131 *------------------------------------------------------------------------*/
133 usbd_get_debug_bits(struct usb_device *udev, struct usb_device_request *req,
134 struct usb_ctrl_debug_bits *dbg)
138 memset(dbg, 0, sizeof(*dbg));
140 /* Compute data stage delay */
142 temp = usb_ctrl_debug.ds_delay;
145 else if (temp > (16*1024))
148 dbg->ds_delay = temp;
150 /* Compute status stage delay */
152 temp = usb_ctrl_debug.ss_delay;
155 else if (temp > (16*1024))
158 dbg->ss_delay = temp;
160 /* Check if this control request should be failed */
162 if (usbd_get_bus_index(udev) != usb_ctrl_debug.bus_index)
165 if (usbd_get_device_index(udev) != usb_ctrl_debug.dev_index)
168 temp = usb_ctrl_debug.bmRequestType_value;
170 if ((temp != req->bmRequestType) && (temp >= 0) && (temp <= 255))
173 temp = usb_ctrl_debug.bRequest_value;
175 if ((temp != req->bRequest) && (temp >= 0) && (temp <= 255))
178 temp = usb_ctrl_debug.ds_fail;
182 temp = usb_ctrl_debug.ss_fail;
188 #endif /* USB_REQ_DEBUG */
189 #endif /* USB_DEBUG */
191 /*------------------------------------------------------------------------*
192 * usbd_do_request_callback
194 * This function is the USB callback for generic USB Host control
196 *------------------------------------------------------------------------*/
198 usbd_do_request_callback(struct usb_xfer *xfer, usb_error_t error)
200 ; /* workaround for a bug in "indent" */
202 DPRINTF("st=%u\n", USB_GET_STATE(xfer));
204 switch (USB_GET_STATE(xfer)) {
206 usbd_transfer_submit(xfer);
209 cv_signal(&xfer->xroot->udev->ctrlreq_cv);
214 /*------------------------------------------------------------------------*
215 * usb_do_clear_stall_callback
217 * This function is the USB callback for generic clear stall requests.
218 *------------------------------------------------------------------------*/
220 usb_do_clear_stall_callback(struct usb_xfer *xfer, usb_error_t error)
222 struct usb_device_request req;
223 struct usb_device *udev;
224 struct usb_endpoint *ep;
225 struct usb_endpoint *ep_end;
226 struct usb_endpoint *ep_first;
229 udev = xfer->xroot->udev;
231 USB_BUS_LOCK(udev->bus);
233 /* round robin endpoint clear stall */
236 ep_end = udev->endpoints + udev->endpoints_max;
237 ep_first = udev->endpoints;
238 to = udev->endpoints_max;
240 switch (USB_GET_STATE(xfer)) {
241 case USB_ST_TRANSFERRED:
243 goto tr_setup; /* device was unconfigured */
248 /* some hardware needs a callback to clear the data toggle */
249 usbd_clear_stall_locked(udev, ep);
250 /* start up the current or next transfer, if any */
251 usb_command_wrapper(&ep->endpoint_q,
252 ep->endpoint_q.curr);
259 break; /* no endpoints - nothing to do */
260 if ((ep < ep_first) || (ep >= ep_end))
261 ep = ep_first; /* endpoint wrapped around */
265 /* setup a clear-stall packet */
267 req.bmRequestType = UT_WRITE_ENDPOINT;
268 req.bRequest = UR_CLEAR_FEATURE;
269 USETW(req.wValue, UF_ENDPOINT_HALT);
270 req.wIndex[0] = ep->edesc->bEndpointAddress;
272 USETW(req.wLength, 0);
274 /* copy in the transfer */
276 usbd_copy_in(xfer->frbuffers, 0, &req, sizeof(req));
279 usbd_xfer_set_frame_len(xfer, 0, sizeof(req));
281 USB_BUS_UNLOCK(udev->bus);
283 usbd_transfer_submit(xfer);
285 USB_BUS_LOCK(udev->bus);
293 if (xfer->error == USB_ERR_CANCELLED) {
299 /* store current endpoint */
301 USB_BUS_UNLOCK(udev->bus);
304 static usb_handle_req_t *
305 usbd_get_hr_func(struct usb_device *udev)
307 /* figure out if there is a Handle Request function */
308 if (udev->flags.usb_mode == USB_MODE_DEVICE)
309 return (usb_temp_get_desc_p);
310 else if (udev->parent_hub == NULL)
311 return (udev->bus->methods->roothub_exec);
316 /*------------------------------------------------------------------------*
317 * usbd_do_request_flags and usbd_do_request
319 * Description of arguments passed to these functions:
321 * "udev" - this is the "usb_device" structure pointer on which the
322 * request should be performed. It is possible to call this function
323 * in both Host Side mode and Device Side mode.
325 * "mtx" - if this argument is non-NULL the mutex pointed to by it
326 * will get dropped and picked up during the execution of this
327 * function, hence this function sometimes needs to sleep. If this
328 * argument is NULL it has no effect.
330 * "req" - this argument must always be non-NULL and points to an
331 * 8-byte structure holding the USB request to be done. The USB
332 * request structure has a bit telling the direction of the USB
333 * request, if it is a read or a write.
335 * "data" - if the "wLength" part of the structure pointed to by "req"
336 * is non-zero this argument must point to a valid kernel buffer which
337 * can hold at least "wLength" bytes. If "wLength" is zero "data" can
340 * "flags" - here is a list of valid flags:
342 * o USB_SHORT_XFER_OK: allows the data transfer to be shorter than
345 * o USB_DELAY_STATUS_STAGE: allows the status stage to be performed
346 * at a later point in time. This is tunable by the "hw.usb.ss_delay"
347 * sysctl. This flag is mostly useful for debugging.
349 * o USB_USER_DATA_PTR: treat the "data" pointer like a userland
352 * "actlen" - if non-NULL the actual transfer length will be stored in
353 * the 16-bit unsigned integer pointed to by "actlen". This
354 * information is mostly useful when the "USB_SHORT_XFER_OK" flag is
357 * "timeout" - gives the timeout for the control transfer in
358 * milliseconds. A "timeout" value less than 50 milliseconds is
359 * treated like a 50 millisecond timeout. A "timeout" value greater
360 * than 30 seconds is treated like a 30 second timeout. This USB stack
361 * does not allow control requests without a timeout.
363 * NOTE: This function is thread safe. All calls to
364 * "usbd_do_request_flags" will be serialised by the use of an
365 * internal "sx_lock".
370 *------------------------------------------------------------------------*/
372 usbd_do_request_flags(struct usb_device *udev, struct mtx *mtx,
373 struct usb_device_request *req, void *data, uint16_t flags,
374 uint16_t *actlen, usb_timeout_t timeout)
377 struct usb_ctrl_debug_bits dbg;
379 usb_handle_req_t *hr_func;
380 struct usb_xfer *xfer;
383 usb_ticks_t start_ticks;
384 usb_ticks_t delta_ticks;
385 usb_ticks_t max_ticks;
392 /* timeout is too small */
395 if (timeout > 30000) {
396 /* timeout is too big */
399 length = UGETW(req->wLength);
401 enum_locked = usbd_enum_is_locked(udev);
403 DPRINTFN(5, "udev=%p bmRequestType=0x%02x bRequest=0x%02x "
404 "wValue=0x%02x%02x wIndex=0x%02x%02x wLength=0x%02x%02x\n",
405 udev, req->bmRequestType, req->bRequest,
406 req->wValue[1], req->wValue[0],
407 req->wIndex[1], req->wIndex[0],
408 req->wLength[1], req->wLength[0]);
410 /* Check if the device is still alive */
411 if (udev->state < USB_STATE_POWERED) {
412 DPRINTF("usb device has gone\n");
413 return (USB_ERR_NOT_CONFIGURED);
417 * Set "actlen" to a known value in case the caller does not
418 * check the return value:
423 #if (USB_HAVE_USER_IO == 0)
424 if (flags & USB_USER_DATA_PTR)
425 return (USB_ERR_INVAL);
427 if ((mtx != NULL) && (mtx != &Giant)) {
429 mtx_assert(mtx, MA_NOTOWNED);
433 * We need to allow suspend and resume at this point, else the
434 * control transfer will timeout if the device is suspended!
437 usbd_sr_unlock(udev);
440 * Grab the default sx-lock so that serialisation
441 * is achieved when multiple threads are involved:
443 sx_xlock(&udev->ctrl_sx);
445 hr_func = usbd_get_hr_func(udev);
447 if (hr_func != NULL) {
448 DPRINTF("Handle Request function is set\n");
453 if (!(req->bmRequestType & UT_READ)) {
455 DPRINTFN(1, "The handle request function "
456 "does not support writing data!\n");
462 /* The root HUB code needs the BUS lock locked */
464 USB_BUS_LOCK(udev->bus);
465 err = (hr_func) (udev, req, &desc, &temp);
466 USB_BUS_UNLOCK(udev->bus);
472 if (!(flags & USB_SHORT_XFER_OK)) {
473 err = USB_ERR_SHORT_XFER;
483 if (flags & USB_USER_DATA_PTR) {
484 if (copyout(desc, data, length)) {
490 bcopy(desc, data, length);
492 goto done; /* success */
496 * Setup a new USB transfer or use the existing one, if any:
498 usbd_ctrl_transfer_setup(udev);
500 xfer = udev->ctrl_xfer[0];
502 /* most likely out of memory */
509 usbd_get_debug_bits(udev, req, &dbg);
511 /* Check for fault injection */
513 flags |= USB_DELAY_STATUS_STAGE;
517 if (flags & USB_DELAY_STATUS_STAGE)
518 xfer->flags.manual_status = 1;
520 xfer->flags.manual_status = 0;
522 if (flags & USB_SHORT_XFER_OK)
523 xfer->flags.short_xfer_ok = 1;
525 xfer->flags.short_xfer_ok = 0;
527 xfer->timeout = timeout;
531 max_ticks = USB_MS_TO_TICKS(timeout);
533 usbd_copy_in(xfer->frbuffers, 0, req, sizeof(*req));
535 usbd_xfer_set_frame_len(xfer, 0, sizeof(*req));
539 if (temp > usbd_xfer_max_len(xfer)) {
540 temp = usbd_xfer_max_len(xfer);
543 if (xfer->flags.manual_status) {
544 if (usbd_xfer_frame_len(xfer, 0) != 0) {
545 /* Execute data stage separately */
547 } else if (temp > 0) {
552 if (dbg.ds_delay > 0) {
554 xfer->xroot->xfer_mtx,
555 USB_MS_TO_TICKS(dbg.ds_delay));
556 /* make sure we don't time out */
562 usbd_xfer_set_frame_len(xfer, 1, temp);
565 if (!(req->bmRequestType & UT_READ)) {
567 if (flags & USB_USER_DATA_PTR) {
568 USB_XFER_UNLOCK(xfer);
569 err = usbd_copy_in_user(xfer->frbuffers + 1,
578 usbd_copy_in(xfer->frbuffers + 1,
581 usbd_xfer_set_frames(xfer, 2);
583 if (usbd_xfer_frame_len(xfer, 0) == 0) {
584 if (xfer->flags.manual_status) {
590 if (dbg.ss_delay > 0) {
592 xfer->xroot->xfer_mtx,
593 USB_MS_TO_TICKS(dbg.ss_delay));
594 /* make sure we don't time out */
598 xfer->flags.manual_status = 0;
603 usbd_xfer_set_frames(xfer, 1);
606 usbd_transfer_start(xfer);
608 while (usbd_transfer_pending(xfer)) {
609 cv_wait(&udev->ctrlreq_cv,
610 xfer->xroot->xfer_mtx);
619 /* get actual length of DATA stage */
621 if (xfer->aframes < 2) {
624 acttemp = usbd_xfer_frame_len(xfer, 1);
627 /* check for short packet */
629 if (temp > acttemp) {
634 if (req->bmRequestType & UT_READ) {
636 if (flags & USB_USER_DATA_PTR) {
637 USB_XFER_UNLOCK(xfer);
638 err = usbd_copy_out_user(xfer->frbuffers + 1,
647 usbd_copy_out(xfer->frbuffers + 1,
652 * Clear "frlengths[0]" so that we don't send the setup
655 usbd_xfer_set_frame_len(xfer, 0, 0);
657 /* update length and data pointer */
659 data = USB_ADD_BYTES(data, temp);
664 /* check for timeout */
666 delta_ticks = ticks - start_ticks;
667 if (delta_ticks > max_ticks) {
669 err = USB_ERR_TIMEOUT;
679 * Make sure that the control endpoint is no longer
680 * blocked in case of a non-transfer related error:
682 usbd_transfer_stop(xfer);
684 USB_XFER_UNLOCK(xfer);
687 sx_xunlock(&udev->ctrl_sx);
692 if ((mtx != NULL) && (mtx != &Giant))
695 return ((usb_error_t)err);
698 /*------------------------------------------------------------------------*
699 * usbd_do_request_proc - factored out code
701 * This function is factored out code. It does basically the same like
702 * usbd_do_request_flags, except it will check the status of the
703 * passed process argument before doing the USB request. If the
704 * process is draining the USB_ERR_IOERROR code will be returned. It
705 * is assumed that the mutex associated with the process is locked
706 * when calling this function.
707 *------------------------------------------------------------------------*/
709 usbd_do_request_proc(struct usb_device *udev, struct usb_process *pproc,
710 struct usb_device_request *req, void *data, uint16_t flags,
711 uint16_t *actlen, usb_timeout_t timeout)
716 /* get request data length */
717 len = UGETW(req->wLength);
719 /* check if the device is being detached */
720 if (usb_proc_is_gone(pproc)) {
721 err = USB_ERR_IOERROR;
725 /* forward the USB request */
726 err = usbd_do_request_flags(udev, pproc->up_mtx,
727 req, data, flags, actlen, timeout);
730 /* on failure we zero the data */
731 /* on short packet we zero the unused data */
732 if ((len != 0) && (req->bmRequestType & UE_DIR_IN)) {
734 memset(data, 0, len);
735 else if (actlen && *actlen != len)
736 memset(((uint8_t *)data) + *actlen, 0, len - *actlen);
741 /*------------------------------------------------------------------------*
742 * usbd_req_reset_port
744 * This function will instruct a USB HUB to perform a reset sequence
745 * on the specified port number.
748 * 0: Success. The USB device should now be at address zero.
749 * Else: Failure. No USB device is present and the USB port should be
751 *------------------------------------------------------------------------*/
753 usbd_req_reset_port(struct usb_device *udev, struct mtx *mtx, uint8_t port)
755 struct usb_port_status ps;
760 uint16_t pr_poll_delay;
761 uint16_t pr_recovery_delay;
764 err = usbd_req_set_port_feature(udev, mtx, port, UHF_PORT_RESET);
769 /* range check input parameters */
770 pr_poll_delay = usb_pr_poll_delay;
771 if (pr_poll_delay < 1) {
773 } else if (pr_poll_delay > 1000) {
774 pr_poll_delay = 1000;
776 pr_recovery_delay = usb_pr_recovery_delay;
777 if (pr_recovery_delay > 1000) {
778 pr_recovery_delay = 1000;
784 /* wait for the device to recover from reset */
785 usb_pause_mtx(mtx, USB_MS_TO_TICKS(pr_poll_delay));
788 /* wait for the device to recover from reset */
789 usb_pause_mtx(mtx, USB_MS_TO_TICKS(USB_PORT_RESET_DELAY));
790 n += USB_PORT_RESET_DELAY;
792 err = usbd_req_get_port_status(udev, mtx, &ps, port);
796 /* check if reset is complete */
797 if (UGETW(ps.wPortChange) & UPS_C_PORT_RESET) {
800 /* check for timeout */
807 /* clear port reset first */
808 err = usbd_req_clear_port_feature(
809 udev, mtx, port, UHF_C_PORT_RESET);
813 /* check for timeout */
815 err = USB_ERR_TIMEOUT;
819 /* wait for the device to recover from reset */
820 usb_pause_mtx(mtx, USB_MS_TO_TICKS(pr_recovery_delay));
822 /* wait for the device to recover from reset */
823 usb_pause_mtx(mtx, USB_MS_TO_TICKS(USB_PORT_RESET_RECOVERY));
827 DPRINTFN(2, "port %d reset returning error=%s\n",
828 port, usbd_errstr(err));
832 /*------------------------------------------------------------------------*
833 * usbd_req_warm_reset_port
835 * This function will instruct an USB HUB to perform a warm reset
836 * sequence on the specified port number. This kind of reset is not
837 * mandatory for LOW-, FULL- and HIGH-speed USB HUBs and is targeted
838 * for SUPER-speed USB HUBs.
841 * 0: Success. The USB device should now be available again.
842 * Else: Failure. No USB device is present and the USB port should be
844 *------------------------------------------------------------------------*/
846 usbd_req_warm_reset_port(struct usb_device *udev, struct mtx *mtx, uint8_t port)
848 struct usb_port_status ps;
853 uint16_t pr_poll_delay;
854 uint16_t pr_recovery_delay;
857 err = usbd_req_set_port_feature(udev, mtx, port, UHF_BH_PORT_RESET);
862 /* range check input parameters */
863 pr_poll_delay = usb_pr_poll_delay;
864 if (pr_poll_delay < 1) {
866 } else if (pr_poll_delay > 1000) {
867 pr_poll_delay = 1000;
869 pr_recovery_delay = usb_pr_recovery_delay;
870 if (pr_recovery_delay > 1000) {
871 pr_recovery_delay = 1000;
877 /* wait for the device to recover from reset */
878 usb_pause_mtx(mtx, USB_MS_TO_TICKS(pr_poll_delay));
881 /* wait for the device to recover from reset */
882 usb_pause_mtx(mtx, USB_MS_TO_TICKS(USB_PORT_RESET_DELAY));
883 n += USB_PORT_RESET_DELAY;
885 err = usbd_req_get_port_status(udev, mtx, &ps, port);
889 /* if the device disappeared, just give up */
890 if (!(UGETW(ps.wPortStatus) & UPS_CURRENT_CONNECT_STATUS)) {
893 /* check if reset is complete */
894 if (UGETW(ps.wPortChange) & UPS_C_BH_PORT_RESET) {
897 /* check for timeout */
904 /* clear port reset first */
905 err = usbd_req_clear_port_feature(
906 udev, mtx, port, UHF_C_BH_PORT_RESET);
910 /* check for timeout */
912 err = USB_ERR_TIMEOUT;
916 /* wait for the device to recover from reset */
917 usb_pause_mtx(mtx, USB_MS_TO_TICKS(pr_recovery_delay));
919 /* wait for the device to recover from reset */
920 usb_pause_mtx(mtx, USB_MS_TO_TICKS(USB_PORT_RESET_RECOVERY));
924 DPRINTFN(2, "port %d warm reset returning error=%s\n",
925 port, usbd_errstr(err));
929 /*------------------------------------------------------------------------*
932 * This function can be used to retrieve USB descriptors. It contains
933 * some additional logic like zeroing of missing descriptor bytes and
934 * retrying an USB descriptor in case of failure. The "min_len"
935 * argument specifies the minimum descriptor length. The "max_len"
936 * argument specifies the maximum descriptor length. If the real
937 * descriptor length is less than the minimum length the missing
938 * byte(s) will be zeroed. The type field, the second byte of the USB
939 * descriptor, will get forced to the correct type. If the "actlen"
940 * pointer is non-NULL, the actual length of the transfer will get
941 * stored in the 16-bit unsigned integer which it is pointing to. The
942 * first byte of the descriptor will not get updated. If the "actlen"
943 * pointer is NULL the first byte of the descriptor will get updated
944 * to reflect the actual length instead. If "min_len" is not equal to
945 * "max_len" then this function will try to retrive the beginning of
946 * the descriptor and base the maximum length on the first byte of the
952 *------------------------------------------------------------------------*/
954 usbd_req_get_desc(struct usb_device *udev,
955 struct mtx *mtx, uint16_t *actlen, void *desc,
956 uint16_t min_len, uint16_t max_len,
957 uint16_t id, uint8_t type, uint8_t index,
960 struct usb_device_request req;
964 DPRINTFN(4, "id=%d, type=%d, index=%d, max_len=%d\n",
965 id, type, index, max_len);
967 req.bmRequestType = UT_READ_DEVICE;
968 req.bRequest = UR_GET_DESCRIPTOR;
969 USETW2(req.wValue, type, index);
970 USETW(req.wIndex, id);
974 if ((min_len < 2) || (max_len < 2)) {
978 USETW(req.wLength, min_len);
980 err = usbd_do_request_flags(udev, mtx, &req,
981 desc, 0, NULL, 1000);
989 usb_pause_mtx(mtx, hz / 5);
995 if (min_len == max_len) {
997 /* enforce correct length */
998 if ((buf[0] > min_len) && (actlen == NULL))
1001 /* enforce correct type */
1008 if (max_len > buf[0]) {
1011 /* zero minimum data */
1013 while (min_len > max_len) {
1018 /* set new minimum length */
1023 if (actlen != NULL) {
1032 /*------------------------------------------------------------------------*
1033 * usbd_req_get_string_any
1035 * This function will return the string given by "string_index"
1036 * using the first language ID. The maximum length "len" includes
1037 * the terminating zero. The "len" argument should be twice as
1038 * big pluss 2 bytes, compared with the actual maximum string length !
1043 *------------------------------------------------------------------------*/
1045 usbd_req_get_string_any(struct usb_device *udev, struct mtx *mtx, char *buf,
1046 uint16_t len, uint8_t string_index)
1057 /* should not happen */
1058 return (USB_ERR_NORMAL_COMPLETION);
1060 if (string_index == 0) {
1061 /* this is the language table */
1063 return (USB_ERR_INVAL);
1065 if (udev->flags.no_strings) {
1067 return (USB_ERR_STALLED);
1069 err = usbd_req_get_string_desc
1070 (udev, mtx, buf, len, udev->langid, string_index);
1075 temp = (uint8_t *)buf;
1078 /* string length is too short */
1080 return (USB_ERR_INVAL);
1082 /* reserve one byte for terminating zero */
1085 /* find maximum length */
1087 n = (temp[0] / 2) - 1;
1091 /* skip descriptor header */
1094 /* reset swap state */
1097 /* convert and filter */
1098 for (i = 0; (i != n); i++) {
1099 c = UGETW(temp + (2 * i));
1101 /* convert from Unicode, handle buggy strings */
1102 if (((c & 0xff00) == 0) && (swap & 1)) {
1103 /* Little Endian, default */
1106 } else if (((c & 0x00ff) == 0) && (swap & 2)) {
1111 /* silently skip bad character */
1116 * Filter by default - we don't allow greater and less than
1117 * signs because they might confuse the dmesg printouts!
1119 if ((*s == '<') || (*s == '>') || (!isprint(*s))) {
1120 /* silently skip bad character */
1125 *s = 0; /* zero terminate resulting string */
1126 return (USB_ERR_NORMAL_COMPLETION);
1129 /*------------------------------------------------------------------------*
1130 * usbd_req_get_string_desc
1132 * If you don't know the language ID, consider using
1133 * "usbd_req_get_string_any()".
1138 *------------------------------------------------------------------------*/
1140 usbd_req_get_string_desc(struct usb_device *udev, struct mtx *mtx, void *sdesc,
1141 uint16_t max_len, uint16_t lang_id,
1142 uint8_t string_index)
1144 return (usbd_req_get_desc(udev, mtx, NULL, sdesc, 2, max_len, lang_id,
1145 UDESC_STRING, string_index, 0));
1148 /*------------------------------------------------------------------------*
1149 * usbd_req_get_config_desc_ptr
1151 * This function is used in device side mode to retrieve the pointer
1152 * to the generated config descriptor. This saves allocating space for
1153 * an additional config descriptor when setting the configuration.
1158 *------------------------------------------------------------------------*/
1160 usbd_req_get_descriptor_ptr(struct usb_device *udev,
1161 struct usb_config_descriptor **ppcd, uint16_t wValue)
1163 struct usb_device_request req;
1164 usb_handle_req_t *hr_func;
1169 req.bmRequestType = UT_READ_DEVICE;
1170 req.bRequest = UR_GET_DESCRIPTOR;
1171 USETW(req.wValue, wValue);
1172 USETW(req.wIndex, 0);
1173 USETW(req.wLength, 0);
1178 hr_func = usbd_get_hr_func(udev);
1180 if (hr_func == NULL)
1181 err = USB_ERR_INVAL;
1183 USB_BUS_LOCK(udev->bus);
1184 err = (hr_func) (udev, &req, &ptr, &len);
1185 USB_BUS_UNLOCK(udev->bus);
1190 else if (ptr == NULL)
1191 err = USB_ERR_INVAL;
1193 *ppcd = __DECONST(struct usb_config_descriptor *, ptr);
1198 /*------------------------------------------------------------------------*
1199 * usbd_req_get_config_desc
1204 *------------------------------------------------------------------------*/
1206 usbd_req_get_config_desc(struct usb_device *udev, struct mtx *mtx,
1207 struct usb_config_descriptor *d, uint8_t conf_index)
1211 DPRINTFN(4, "confidx=%d\n", conf_index);
1213 err = usbd_req_get_desc(udev, mtx, NULL, d, sizeof(*d),
1214 sizeof(*d), 0, UDESC_CONFIG, conf_index, 0);
1218 /* Extra sanity checking */
1219 if (UGETW(d->wTotalLength) < sizeof(*d)) {
1220 err = USB_ERR_INVAL;
1226 /*------------------------------------------------------------------------*
1227 * usbd_req_get_config_desc_full
1229 * This function gets the complete USB configuration descriptor and
1230 * ensures that "wTotalLength" is correct.
1235 *------------------------------------------------------------------------*/
1237 usbd_req_get_config_desc_full(struct usb_device *udev, struct mtx *mtx,
1238 struct usb_config_descriptor **ppcd, struct malloc_type *mtype,
1241 struct usb_config_descriptor cd;
1242 struct usb_config_descriptor *cdesc;
1246 DPRINTFN(4, "index=%d\n", index);
1250 err = usbd_req_get_config_desc(udev, mtx, &cd, index);
1254 /* get full descriptor */
1255 len = UGETW(cd.wTotalLength);
1256 if (len < sizeof(*cdesc)) {
1257 /* corrupt descriptor */
1258 return (USB_ERR_INVAL);
1260 cdesc = malloc(len, mtype, M_WAITOK);
1261 if (cdesc == NULL) {
1262 return (USB_ERR_NOMEM);
1264 err = usbd_req_get_desc(udev, mtx, NULL, cdesc, len, len, 0,
1265 UDESC_CONFIG, index, 3);
1270 /* make sure that the device is not fooling us: */
1271 USETW(cdesc->wTotalLength, len);
1275 return (0); /* success */
1278 /*------------------------------------------------------------------------*
1279 * usbd_req_get_device_desc
1284 *------------------------------------------------------------------------*/
1286 usbd_req_get_device_desc(struct usb_device *udev, struct mtx *mtx,
1287 struct usb_device_descriptor *d)
1290 return (usbd_req_get_desc(udev, mtx, NULL, d, sizeof(*d),
1291 sizeof(*d), 0, UDESC_DEVICE, 0, 3));
1294 /*------------------------------------------------------------------------*
1295 * usbd_req_get_alt_interface_no
1300 *------------------------------------------------------------------------*/
1302 usbd_req_get_alt_interface_no(struct usb_device *udev, struct mtx *mtx,
1303 uint8_t *alt_iface_no, uint8_t iface_index)
1305 struct usb_interface *iface = usbd_get_iface(udev, iface_index);
1306 struct usb_device_request req;
1308 if ((iface == NULL) || (iface->idesc == NULL))
1309 return (USB_ERR_INVAL);
1311 req.bmRequestType = UT_READ_INTERFACE;
1312 req.bRequest = UR_GET_INTERFACE;
1313 USETW(req.wValue, 0);
1314 req.wIndex[0] = iface->idesc->bInterfaceNumber;
1316 USETW(req.wLength, 1);
1317 return (usbd_do_request(udev, mtx, &req, alt_iface_no));
1320 /*------------------------------------------------------------------------*
1321 * usbd_req_set_alt_interface_no
1326 *------------------------------------------------------------------------*/
1328 usbd_req_set_alt_interface_no(struct usb_device *udev, struct mtx *mtx,
1329 uint8_t iface_index, uint8_t alt_no)
1331 struct usb_interface *iface = usbd_get_iface(udev, iface_index);
1332 struct usb_device_request req;
1334 if ((iface == NULL) || (iface->idesc == NULL))
1335 return (USB_ERR_INVAL);
1337 req.bmRequestType = UT_WRITE_INTERFACE;
1338 req.bRequest = UR_SET_INTERFACE;
1339 req.wValue[0] = alt_no;
1341 req.wIndex[0] = iface->idesc->bInterfaceNumber;
1343 USETW(req.wLength, 0);
1344 return (usbd_do_request(udev, mtx, &req, 0));
1347 /*------------------------------------------------------------------------*
1348 * usbd_req_get_device_status
1353 *------------------------------------------------------------------------*/
1355 usbd_req_get_device_status(struct usb_device *udev, struct mtx *mtx,
1356 struct usb_status *st)
1358 struct usb_device_request req;
1360 req.bmRequestType = UT_READ_DEVICE;
1361 req.bRequest = UR_GET_STATUS;
1362 USETW(req.wValue, 0);
1363 USETW(req.wIndex, 0);
1364 USETW(req.wLength, sizeof(*st));
1365 return (usbd_do_request(udev, mtx, &req, st));
1368 /*------------------------------------------------------------------------*
1369 * usbd_req_get_hub_descriptor
1374 *------------------------------------------------------------------------*/
1376 usbd_req_get_hub_descriptor(struct usb_device *udev, struct mtx *mtx,
1377 struct usb_hub_descriptor *hd, uint8_t nports)
1379 struct usb_device_request req;
1380 uint16_t len = (nports + 7 + (8 * 8)) / 8;
1382 req.bmRequestType = UT_READ_CLASS_DEVICE;
1383 req.bRequest = UR_GET_DESCRIPTOR;
1384 USETW2(req.wValue, UDESC_HUB, 0);
1385 USETW(req.wIndex, 0);
1386 USETW(req.wLength, len);
1387 return (usbd_do_request(udev, mtx, &req, hd));
1390 /*------------------------------------------------------------------------*
1391 * usbd_req_get_ss_hub_descriptor
1396 *------------------------------------------------------------------------*/
1398 usbd_req_get_ss_hub_descriptor(struct usb_device *udev, struct mtx *mtx,
1399 struct usb_hub_ss_descriptor *hd, uint8_t nports)
1401 struct usb_device_request req;
1402 uint16_t len = sizeof(*hd) - 32 + 1 + ((nports + 7) / 8);
1404 req.bmRequestType = UT_READ_CLASS_DEVICE;
1405 req.bRequest = UR_GET_DESCRIPTOR;
1406 USETW2(req.wValue, UDESC_SS_HUB, 0);
1407 USETW(req.wIndex, 0);
1408 USETW(req.wLength, len);
1409 return (usbd_do_request(udev, mtx, &req, hd));
1412 /*------------------------------------------------------------------------*
1413 * usbd_req_get_hub_status
1418 *------------------------------------------------------------------------*/
1420 usbd_req_get_hub_status(struct usb_device *udev, struct mtx *mtx,
1421 struct usb_hub_status *st)
1423 struct usb_device_request req;
1425 req.bmRequestType = UT_READ_CLASS_DEVICE;
1426 req.bRequest = UR_GET_STATUS;
1427 USETW(req.wValue, 0);
1428 USETW(req.wIndex, 0);
1429 USETW(req.wLength, sizeof(struct usb_hub_status));
1430 return (usbd_do_request(udev, mtx, &req, st));
1433 /*------------------------------------------------------------------------*
1434 * usbd_req_set_address
1436 * This function is used to set the address for an USB device. After
1437 * port reset the USB device will respond at address zero.
1442 *------------------------------------------------------------------------*/
1444 usbd_req_set_address(struct usb_device *udev, struct mtx *mtx, uint16_t addr)
1446 struct usb_device_request req;
1449 DPRINTFN(6, "setting device address=%d\n", addr);
1451 req.bmRequestType = UT_WRITE_DEVICE;
1452 req.bRequest = UR_SET_ADDRESS;
1453 USETW(req.wValue, addr);
1454 USETW(req.wIndex, 0);
1455 USETW(req.wLength, 0);
1457 err = USB_ERR_INVAL;
1459 /* check if USB controller handles set address */
1460 if (udev->bus->methods->set_address != NULL)
1461 err = (udev->bus->methods->set_address) (udev, mtx, addr);
1463 if (err != USB_ERR_INVAL)
1466 /* Setting the address should not take more than 1 second ! */
1467 err = usbd_do_request_flags(udev, mtx, &req, NULL,
1468 USB_DELAY_STATUS_STAGE, NULL, 1000);
1471 /* allow device time to set new address */
1473 USB_MS_TO_TICKS(USB_SET_ADDRESS_SETTLE));
1478 /*------------------------------------------------------------------------*
1479 * usbd_req_get_port_status
1484 *------------------------------------------------------------------------*/
1486 usbd_req_get_port_status(struct usb_device *udev, struct mtx *mtx,
1487 struct usb_port_status *ps, uint8_t port)
1489 struct usb_device_request req;
1491 req.bmRequestType = UT_READ_CLASS_OTHER;
1492 req.bRequest = UR_GET_STATUS;
1493 USETW(req.wValue, 0);
1494 req.wIndex[0] = port;
1496 USETW(req.wLength, sizeof *ps);
1497 return (usbd_do_request(udev, mtx, &req, ps));
1500 /*------------------------------------------------------------------------*
1501 * usbd_req_clear_hub_feature
1506 *------------------------------------------------------------------------*/
1508 usbd_req_clear_hub_feature(struct usb_device *udev, struct mtx *mtx,
1511 struct usb_device_request req;
1513 req.bmRequestType = UT_WRITE_CLASS_DEVICE;
1514 req.bRequest = UR_CLEAR_FEATURE;
1515 USETW(req.wValue, sel);
1516 USETW(req.wIndex, 0);
1517 USETW(req.wLength, 0);
1518 return (usbd_do_request(udev, mtx, &req, 0));
1521 /*------------------------------------------------------------------------*
1522 * usbd_req_set_hub_feature
1527 *------------------------------------------------------------------------*/
1529 usbd_req_set_hub_feature(struct usb_device *udev, struct mtx *mtx,
1532 struct usb_device_request req;
1534 req.bmRequestType = UT_WRITE_CLASS_DEVICE;
1535 req.bRequest = UR_SET_FEATURE;
1536 USETW(req.wValue, sel);
1537 USETW(req.wIndex, 0);
1538 USETW(req.wLength, 0);
1539 return (usbd_do_request(udev, mtx, &req, 0));
1542 /*------------------------------------------------------------------------*
1543 * usbd_req_set_hub_u1_timeout
1548 *------------------------------------------------------------------------*/
1550 usbd_req_set_hub_u1_timeout(struct usb_device *udev, struct mtx *mtx,
1551 uint8_t port, uint8_t timeout)
1553 struct usb_device_request req;
1555 req.bmRequestType = UT_WRITE_CLASS_OTHER;
1556 req.bRequest = UR_SET_FEATURE;
1557 USETW(req.wValue, UHF_PORT_U1_TIMEOUT);
1558 req.wIndex[0] = port;
1559 req.wIndex[1] = timeout;
1560 USETW(req.wLength, 0);
1561 return (usbd_do_request(udev, mtx, &req, 0));
1564 /*------------------------------------------------------------------------*
1565 * usbd_req_set_hub_u2_timeout
1570 *------------------------------------------------------------------------*/
1572 usbd_req_set_hub_u2_timeout(struct usb_device *udev, struct mtx *mtx,
1573 uint8_t port, uint8_t timeout)
1575 struct usb_device_request req;
1577 req.bmRequestType = UT_WRITE_CLASS_OTHER;
1578 req.bRequest = UR_SET_FEATURE;
1579 USETW(req.wValue, UHF_PORT_U2_TIMEOUT);
1580 req.wIndex[0] = port;
1581 req.wIndex[1] = timeout;
1582 USETW(req.wLength, 0);
1583 return (usbd_do_request(udev, mtx, &req, 0));
1586 /*------------------------------------------------------------------------*
1587 * usbd_req_set_hub_depth
1592 *------------------------------------------------------------------------*/
1594 usbd_req_set_hub_depth(struct usb_device *udev, struct mtx *mtx,
1597 struct usb_device_request req;
1599 req.bmRequestType = UT_WRITE_CLASS_DEVICE;
1600 req.bRequest = UR_SET_HUB_DEPTH;
1601 USETW(req.wValue, depth);
1602 USETW(req.wIndex, 0);
1603 USETW(req.wLength, 0);
1604 return (usbd_do_request(udev, mtx, &req, 0));
1607 /*------------------------------------------------------------------------*
1608 * usbd_req_clear_port_feature
1613 *------------------------------------------------------------------------*/
1615 usbd_req_clear_port_feature(struct usb_device *udev, struct mtx *mtx,
1616 uint8_t port, uint16_t sel)
1618 struct usb_device_request req;
1620 req.bmRequestType = UT_WRITE_CLASS_OTHER;
1621 req.bRequest = UR_CLEAR_FEATURE;
1622 USETW(req.wValue, sel);
1623 req.wIndex[0] = port;
1625 USETW(req.wLength, 0);
1626 return (usbd_do_request(udev, mtx, &req, 0));
1629 /*------------------------------------------------------------------------*
1630 * usbd_req_set_port_feature
1635 *------------------------------------------------------------------------*/
1637 usbd_req_set_port_feature(struct usb_device *udev, struct mtx *mtx,
1638 uint8_t port, uint16_t sel)
1640 struct usb_device_request req;
1642 req.bmRequestType = UT_WRITE_CLASS_OTHER;
1643 req.bRequest = UR_SET_FEATURE;
1644 USETW(req.wValue, sel);
1645 req.wIndex[0] = port;
1647 USETW(req.wLength, 0);
1648 return (usbd_do_request(udev, mtx, &req, 0));
1651 /*------------------------------------------------------------------------*
1652 * usbd_req_set_protocol
1657 *------------------------------------------------------------------------*/
1659 usbd_req_set_protocol(struct usb_device *udev, struct mtx *mtx,
1660 uint8_t iface_index, uint16_t report)
1662 struct usb_interface *iface = usbd_get_iface(udev, iface_index);
1663 struct usb_device_request req;
1665 if ((iface == NULL) || (iface->idesc == NULL)) {
1666 return (USB_ERR_INVAL);
1668 DPRINTFN(5, "iface=%p, report=%d, endpt=%d\n",
1669 iface, report, iface->idesc->bInterfaceNumber);
1671 req.bmRequestType = UT_WRITE_CLASS_INTERFACE;
1672 req.bRequest = UR_SET_PROTOCOL;
1673 USETW(req.wValue, report);
1674 req.wIndex[0] = iface->idesc->bInterfaceNumber;
1676 USETW(req.wLength, 0);
1677 return (usbd_do_request(udev, mtx, &req, 0));
1680 /*------------------------------------------------------------------------*
1681 * usbd_req_set_report
1686 *------------------------------------------------------------------------*/
1688 usbd_req_set_report(struct usb_device *udev, struct mtx *mtx, void *data, uint16_t len,
1689 uint8_t iface_index, uint8_t type, uint8_t id)
1691 struct usb_interface *iface = usbd_get_iface(udev, iface_index);
1692 struct usb_device_request req;
1694 if ((iface == NULL) || (iface->idesc == NULL)) {
1695 return (USB_ERR_INVAL);
1697 DPRINTFN(5, "len=%d\n", len);
1699 req.bmRequestType = UT_WRITE_CLASS_INTERFACE;
1700 req.bRequest = UR_SET_REPORT;
1701 USETW2(req.wValue, type, id);
1702 req.wIndex[0] = iface->idesc->bInterfaceNumber;
1704 USETW(req.wLength, len);
1705 return (usbd_do_request(udev, mtx, &req, data));
1708 /*------------------------------------------------------------------------*
1709 * usbd_req_get_report
1714 *------------------------------------------------------------------------*/
1716 usbd_req_get_report(struct usb_device *udev, struct mtx *mtx, void *data,
1717 uint16_t len, uint8_t iface_index, uint8_t type, uint8_t id)
1719 struct usb_interface *iface = usbd_get_iface(udev, iface_index);
1720 struct usb_device_request req;
1722 if ((iface == NULL) || (iface->idesc == NULL) || (id == 0)) {
1723 return (USB_ERR_INVAL);
1725 DPRINTFN(5, "len=%d\n", len);
1727 req.bmRequestType = UT_READ_CLASS_INTERFACE;
1728 req.bRequest = UR_GET_REPORT;
1729 USETW2(req.wValue, type, id);
1730 req.wIndex[0] = iface->idesc->bInterfaceNumber;
1732 USETW(req.wLength, len);
1733 return (usbd_do_request(udev, mtx, &req, data));
1736 /*------------------------------------------------------------------------*
1742 *------------------------------------------------------------------------*/
1744 usbd_req_set_idle(struct usb_device *udev, struct mtx *mtx,
1745 uint8_t iface_index, uint8_t duration, uint8_t id)
1747 struct usb_interface *iface = usbd_get_iface(udev, iface_index);
1748 struct usb_device_request req;
1750 if ((iface == NULL) || (iface->idesc == NULL)) {
1751 return (USB_ERR_INVAL);
1753 DPRINTFN(5, "%d %d\n", duration, id);
1755 req.bmRequestType = UT_WRITE_CLASS_INTERFACE;
1756 req.bRequest = UR_SET_IDLE;
1757 USETW2(req.wValue, duration, id);
1758 req.wIndex[0] = iface->idesc->bInterfaceNumber;
1760 USETW(req.wLength, 0);
1761 return (usbd_do_request(udev, mtx, &req, 0));
1764 /*------------------------------------------------------------------------*
1765 * usbd_req_get_report_descriptor
1770 *------------------------------------------------------------------------*/
1772 usbd_req_get_report_descriptor(struct usb_device *udev, struct mtx *mtx,
1773 void *d, uint16_t size, uint8_t iface_index)
1775 struct usb_interface *iface = usbd_get_iface(udev, iface_index);
1776 struct usb_device_request req;
1778 if ((iface == NULL) || (iface->idesc == NULL)) {
1779 return (USB_ERR_INVAL);
1781 req.bmRequestType = UT_READ_INTERFACE;
1782 req.bRequest = UR_GET_DESCRIPTOR;
1783 USETW2(req.wValue, UDESC_REPORT, 0); /* report id should be 0 */
1784 req.wIndex[0] = iface->idesc->bInterfaceNumber;
1786 USETW(req.wLength, size);
1787 return (usbd_do_request(udev, mtx, &req, d));
1790 /*------------------------------------------------------------------------*
1791 * usbd_req_set_config
1793 * This function is used to select the current configuration number in
1794 * both USB device side mode and USB host side mode. When setting the
1795 * configuration the function of the interfaces can change.
1800 *------------------------------------------------------------------------*/
1802 usbd_req_set_config(struct usb_device *udev, struct mtx *mtx, uint8_t conf)
1804 struct usb_device_request req;
1806 DPRINTF("setting config %d\n", conf);
1808 /* do "set configuration" request */
1810 req.bmRequestType = UT_WRITE_DEVICE;
1811 req.bRequest = UR_SET_CONFIG;
1812 req.wValue[0] = conf;
1814 USETW(req.wIndex, 0);
1815 USETW(req.wLength, 0);
1816 return (usbd_do_request(udev, mtx, &req, 0));
1819 /*------------------------------------------------------------------------*
1820 * usbd_req_get_config
1825 *------------------------------------------------------------------------*/
1827 usbd_req_get_config(struct usb_device *udev, struct mtx *mtx, uint8_t *pconf)
1829 struct usb_device_request req;
1831 req.bmRequestType = UT_READ_DEVICE;
1832 req.bRequest = UR_GET_CONFIG;
1833 USETW(req.wValue, 0);
1834 USETW(req.wIndex, 0);
1835 USETW(req.wLength, 1);
1836 return (usbd_do_request(udev, mtx, &req, pconf));
1839 /*------------------------------------------------------------------------*
1840 * usbd_setup_device_desc
1841 *------------------------------------------------------------------------*/
1843 usbd_setup_device_desc(struct usb_device *udev, struct mtx *mtx)
1848 * Get the first 8 bytes of the device descriptor !
1850 * NOTE: "usbd_do_request()" will check the device descriptor
1851 * next time we do a request to see if the maximum packet size
1852 * changed! The 8 first bytes of the device descriptor
1853 * contains the maximum packet size to use on control endpoint
1854 * 0. If this value is different from "USB_MAX_IPACKET" a new
1855 * USB control request will be setup!
1857 switch (udev->speed) {
1858 case USB_SPEED_FULL:
1860 err = usbd_req_get_desc(udev, mtx, NULL, &udev->ddesc,
1861 USB_MAX_IPACKET, USB_MAX_IPACKET, 0, UDESC_DEVICE, 0, 0);
1863 DPRINTFN(0, "getting device descriptor "
1864 "at addr %d failed, %s\n", udev->address,
1870 DPRINTF("Minimum MaxPacketSize is large enough "
1871 "to hold the complete device descriptor\n");
1875 /* get the full device descriptor */
1876 err = usbd_req_get_device_desc(udev, mtx, &udev->ddesc);
1878 /* try one more time, if error */
1880 err = usbd_req_get_device_desc(udev, mtx, &udev->ddesc);
1883 DPRINTF("addr=%d, getting full desc failed\n",
1888 DPRINTF("adding unit addr=%d, rev=%02x, class=%d, "
1889 "subclass=%d, protocol=%d, maxpacket=%d, len=%d, speed=%d\n",
1890 udev->address, UGETW(udev->ddesc.bcdUSB),
1891 udev->ddesc.bDeviceClass,
1892 udev->ddesc.bDeviceSubClass,
1893 udev->ddesc.bDeviceProtocol,
1894 udev->ddesc.bMaxPacketSize,
1895 udev->ddesc.bLength,
1901 /*------------------------------------------------------------------------*
1902 * usbd_req_re_enumerate
1904 * NOTE: After this function returns the hardware is in the
1905 * unconfigured state! The application is responsible for setting a
1906 * new configuration.
1911 *------------------------------------------------------------------------*/
1913 usbd_req_re_enumerate(struct usb_device *udev, struct mtx *mtx)
1915 struct usb_device *parent_hub;
1918 uint8_t do_retry = 1;
1920 if (udev->flags.usb_mode != USB_MODE_HOST) {
1921 return (USB_ERR_INVAL);
1923 old_addr = udev->address;
1924 parent_hub = udev->parent_hub;
1925 if (parent_hub == NULL) {
1926 return (USB_ERR_INVAL);
1929 err = usbd_req_reset_port(parent_hub, mtx, udev->port_no);
1931 DPRINTFN(0, "addr=%d, port reset failed, %s\n",
1932 old_addr, usbd_errstr(err));
1937 * After that the port has been reset our device should be at
1940 udev->address = USB_START_ADDR;
1942 /* reset "bMaxPacketSize" */
1943 udev->ddesc.bMaxPacketSize = USB_MAX_IPACKET;
1945 /* reset USB state */
1946 usb_set_device_state(udev, USB_STATE_POWERED);
1949 * Restore device address:
1951 err = usbd_req_set_address(udev, mtx, old_addr);
1953 /* XXX ignore any errors! */
1954 DPRINTFN(0, "addr=%d, set address failed! (%s, ignored)\n",
1955 old_addr, usbd_errstr(err));
1958 * Restore device address, if the controller driver did not
1961 if (udev->address == USB_START_ADDR)
1962 udev->address = old_addr;
1964 /* setup the device descriptor and the initial "wMaxPacketSize" */
1965 err = usbd_setup_device_desc(udev, mtx);
1968 if (err && do_retry) {
1969 /* give the USB firmware some time to load */
1970 usb_pause_mtx(mtx, hz / 2);
1971 /* no more retries after this retry */
1976 /* restore address */
1977 if (udev->address == USB_START_ADDR)
1978 udev->address = old_addr;
1979 /* update state, if successful */
1981 usb_set_device_state(udev, USB_STATE_ADDRESSED);
1985 /*------------------------------------------------------------------------*
1986 * usbd_req_clear_device_feature
1991 *------------------------------------------------------------------------*/
1993 usbd_req_clear_device_feature(struct usb_device *udev, struct mtx *mtx,
1996 struct usb_device_request req;
1998 req.bmRequestType = UT_WRITE_DEVICE;
1999 req.bRequest = UR_CLEAR_FEATURE;
2000 USETW(req.wValue, sel);
2001 USETW(req.wIndex, 0);
2002 USETW(req.wLength, 0);
2003 return (usbd_do_request(udev, mtx, &req, 0));
2006 /*------------------------------------------------------------------------*
2007 * usbd_req_set_device_feature
2012 *------------------------------------------------------------------------*/
2014 usbd_req_set_device_feature(struct usb_device *udev, struct mtx *mtx,
2017 struct usb_device_request req;
2019 req.bmRequestType = UT_WRITE_DEVICE;
2020 req.bRequest = UR_SET_FEATURE;
2021 USETW(req.wValue, sel);
2022 USETW(req.wIndex, 0);
2023 USETW(req.wLength, 0);
2024 return (usbd_do_request(udev, mtx, &req, 0));