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freebsd-skq/sys/dev/usb/usb_request.c
Hans Petter Selasky b8b3f4fdc3 Improve handling of alternate settings in the USB stack. 
Allow setting the alternate interface number to fail when there is only
one alternate setting present, to comply with the USB specification.

Refactor how iface->num_altsetting is computed.

Bump the __FreeBSD_version due to change of core USB structure.

PR:		251856
MFC after:	1 week
Submitted by:	Ma, Horse <Shichun.Ma@dell.com>
Sponsored by:	Mellanox Technologies // NVIDIA Networking
2020-12-15 12:05:07 +00:00

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/* $FreeBSD$ */
/*-
* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
*
* Copyright (c) 1998 The NetBSD Foundation, Inc. All rights reserved.
* Copyright (c) 1998 Lennart Augustsson. All rights reserved.
* Copyright (c) 2008-2020 Hans Petter Selasky. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#ifdef USB_GLOBAL_INCLUDE_FILE
#include USB_GLOBAL_INCLUDE_FILE
#else
#include <sys/stdint.h>
#include <sys/stddef.h>
#include <sys/param.h>
#include <sys/queue.h>
#include <sys/types.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/bus.h>
#include <sys/module.h>
#include <sys/lock.h>
#include <sys/mutex.h>
#include <sys/condvar.h>
#include <sys/sysctl.h>
#include <sys/sx.h>
#include <sys/unistd.h>
#include <sys/callout.h>
#include <sys/malloc.h>
#include <sys/priv.h>
#include <dev/usb/usb.h>
#include <dev/usb/usbdi.h>
#include <dev/usb/usbdi_util.h>
#include <dev/usb/usbhid.h>
#define USB_DEBUG_VAR usb_debug
#include <dev/usb/usb_core.h>
#include <dev/usb/usb_busdma.h>
#include <dev/usb/usb_request.h>
#include <dev/usb/usb_process.h>
#include <dev/usb/usb_transfer.h>
#include <dev/usb/usb_debug.h>
#include <dev/usb/usb_device.h>
#include <dev/usb/usb_util.h>
#include <dev/usb/usb_dynamic.h>
#include <dev/usb/usb_controller.h>
#include <dev/usb/usb_bus.h>
#include <sys/ctype.h>
#endif /* USB_GLOBAL_INCLUDE_FILE */
static int usb_no_cs_fail;
SYSCTL_INT(_hw_usb, OID_AUTO, no_cs_fail, CTLFLAG_RWTUN,
&usb_no_cs_fail, 0, "USB clear stall failures are ignored, if set");
static int usb_full_ddesc;
SYSCTL_INT(_hw_usb, OID_AUTO, full_ddesc, CTLFLAG_RWTUN,
&usb_full_ddesc, 0, "USB always read complete device descriptor, if set");
#ifdef USB_DEBUG
#ifdef USB_REQ_DEBUG
/* The following structures are used in connection to fault injection. */
struct usb_ctrl_debug {
int bus_index; /* target bus */
int dev_index; /* target address */
int ds_fail; /* fail data stage */
int ss_fail; /* fail status stage */
int ds_delay; /* data stage delay in ms */
int ss_delay; /* status stage delay in ms */
int bmRequestType_value;
int bRequest_value;
};
struct usb_ctrl_debug_bits {
uint16_t ds_delay;
uint16_t ss_delay;
uint8_t ds_fail:1;
uint8_t ss_fail:1;
uint8_t enabled:1;
};
/* The default is to disable fault injection. */
static struct usb_ctrl_debug usb_ctrl_debug = {
.bus_index = -1,
.dev_index = -1,
.bmRequestType_value = -1,
.bRequest_value = -1,
};
SYSCTL_INT(_hw_usb, OID_AUTO, ctrl_bus_fail, CTLFLAG_RWTUN,
&usb_ctrl_debug.bus_index, 0, "USB controller index to fail");
SYSCTL_INT(_hw_usb, OID_AUTO, ctrl_dev_fail, CTLFLAG_RWTUN,
&usb_ctrl_debug.dev_index, 0, "USB device address to fail");
SYSCTL_INT(_hw_usb, OID_AUTO, ctrl_ds_fail, CTLFLAG_RWTUN,
&usb_ctrl_debug.ds_fail, 0, "USB fail data stage");
SYSCTL_INT(_hw_usb, OID_AUTO, ctrl_ss_fail, CTLFLAG_RWTUN,
&usb_ctrl_debug.ss_fail, 0, "USB fail status stage");
SYSCTL_INT(_hw_usb, OID_AUTO, ctrl_ds_delay, CTLFLAG_RWTUN,
&usb_ctrl_debug.ds_delay, 0, "USB data stage delay in ms");
SYSCTL_INT(_hw_usb, OID_AUTO, ctrl_ss_delay, CTLFLAG_RWTUN,
&usb_ctrl_debug.ss_delay, 0, "USB status stage delay in ms");
SYSCTL_INT(_hw_usb, OID_AUTO, ctrl_rt_fail, CTLFLAG_RWTUN,
&usb_ctrl_debug.bmRequestType_value, 0, "USB bmRequestType to fail");
SYSCTL_INT(_hw_usb, OID_AUTO, ctrl_rv_fail, CTLFLAG_RWTUN,
&usb_ctrl_debug.bRequest_value, 0, "USB bRequest to fail");
/*------------------------------------------------------------------------*
* usbd_get_debug_bits
*
* This function is only useful in USB host mode.
*------------------------------------------------------------------------*/
static void
usbd_get_debug_bits(struct usb_device *udev, struct usb_device_request *req,
struct usb_ctrl_debug_bits *dbg)
{
int temp;
memset(dbg, 0, sizeof(*dbg));
/* Compute data stage delay */
temp = usb_ctrl_debug.ds_delay;
if (temp < 0)
temp = 0;
else if (temp > (16*1024))
temp = (16*1024);
dbg->ds_delay = temp;
/* Compute status stage delay */
temp = usb_ctrl_debug.ss_delay;
if (temp < 0)
temp = 0;
else if (temp > (16*1024))
temp = (16*1024);
dbg->ss_delay = temp;
/* Check if this control request should be failed */
if (usbd_get_bus_index(udev) != usb_ctrl_debug.bus_index)
return;
if (usbd_get_device_index(udev) != usb_ctrl_debug.dev_index)
return;
temp = usb_ctrl_debug.bmRequestType_value;
if ((temp != req->bmRequestType) && (temp >= 0) && (temp <= 255))
return;
temp = usb_ctrl_debug.bRequest_value;
if ((temp != req->bRequest) && (temp >= 0) && (temp <= 255))
return;
temp = usb_ctrl_debug.ds_fail;
if (temp)
dbg->ds_fail = 1;
temp = usb_ctrl_debug.ss_fail;
if (temp)
dbg->ss_fail = 1;
dbg->enabled = 1;
}
#endif /* USB_REQ_DEBUG */
#endif /* USB_DEBUG */
/*------------------------------------------------------------------------*
* usbd_do_request_callback
*
* This function is the USB callback for generic USB Host control
* transfers.
*------------------------------------------------------------------------*/
void
usbd_do_request_callback(struct usb_xfer *xfer, usb_error_t error)
{
; /* workaround for a bug in "indent" */
DPRINTF("st=%u\n", USB_GET_STATE(xfer));
switch (USB_GET_STATE(xfer)) {
case USB_ST_SETUP:
usbd_transfer_submit(xfer);
break;
default:
cv_signal(&xfer->xroot->udev->ctrlreq_cv);
break;
}
}
/*------------------------------------------------------------------------*
* usb_do_clear_stall_callback
*
* This function is the USB callback for generic clear stall requests.
*------------------------------------------------------------------------*/
void
usb_do_clear_stall_callback(struct usb_xfer *xfer, usb_error_t error)
{
struct usb_device_request req;
struct usb_device *udev;
struct usb_endpoint *ep;
struct usb_endpoint *ep_end;
struct usb_endpoint *ep_first;
usb_stream_t x;
uint8_t to;
udev = xfer->xroot->udev;
USB_BUS_LOCK(udev->bus);
/* round robin endpoint clear stall */
ep = udev->ep_curr;
ep_end = udev->endpoints + udev->endpoints_max;
ep_first = udev->endpoints;
to = udev->endpoints_max;
switch (USB_GET_STATE(xfer)) {
case USB_ST_TRANSFERRED:
tr_transferred:
/* reset error counter */
udev->clear_stall_errors = 0;
if (ep == NULL)
goto tr_setup; /* device was unconfigured */
if (ep->edesc &&
ep->is_stalled) {
ep->toggle_next = 0;
ep->is_stalled = 0;
/* some hardware needs a callback to clear the data toggle */
usbd_clear_stall_locked(udev, ep);
for (x = 0; x != USB_MAX_EP_STREAMS; x++) {
/* start the current or next transfer, if any */
usb_command_wrapper(&ep->endpoint_q[x],
ep->endpoint_q[x].curr);
}
}
ep++;
case USB_ST_SETUP:
tr_setup:
if (to == 0)
break; /* no endpoints - nothing to do */
if ((ep < ep_first) || (ep >= ep_end))
ep = ep_first; /* endpoint wrapped around */
if (ep->edesc &&
ep->is_stalled) {
/* setup a clear-stall packet */
req.bmRequestType = UT_WRITE_ENDPOINT;
req.bRequest = UR_CLEAR_FEATURE;
USETW(req.wValue, UF_ENDPOINT_HALT);
req.wIndex[0] = ep->edesc->bEndpointAddress;
req.wIndex[1] = 0;
USETW(req.wLength, 0);
/* copy in the transfer */
usbd_copy_in(xfer->frbuffers, 0, &req, sizeof(req));
/* set length */
usbd_xfer_set_frame_len(xfer, 0, sizeof(req));
xfer->nframes = 1;
USB_BUS_UNLOCK(udev->bus);
usbd_transfer_submit(xfer);
USB_BUS_LOCK(udev->bus);
break;
}
ep++;
to--;
goto tr_setup;
default:
if (error == USB_ERR_CANCELLED)
break;
DPRINTF("Clear stall failed.\n");
/*
* Some VMs like VirtualBox always return failure on
* clear-stall which we sometimes should just ignore.
*/
if (usb_no_cs_fail)
goto tr_transferred;
if (udev->clear_stall_errors == USB_CS_RESET_LIMIT)
goto tr_setup;
if (error == USB_ERR_TIMEOUT) {
udev->clear_stall_errors = USB_CS_RESET_LIMIT;
DPRINTF("Trying to re-enumerate.\n");
usbd_start_re_enumerate(udev);
} else {
udev->clear_stall_errors++;
if (udev->clear_stall_errors == USB_CS_RESET_LIMIT) {
DPRINTF("Trying to re-enumerate.\n");
usbd_start_re_enumerate(udev);
}
}
goto tr_setup;
}
/* store current endpoint */
udev->ep_curr = ep;
USB_BUS_UNLOCK(udev->bus);
}
static usb_handle_req_t *
usbd_get_hr_func(struct usb_device *udev)
{
/* figure out if there is a Handle Request function */
if (udev->flags.usb_mode == USB_MODE_DEVICE)
return (usb_temp_get_desc_p);
else if (udev->parent_hub == NULL)
return (udev->bus->methods->roothub_exec);
else
return (NULL);
}
/*------------------------------------------------------------------------*
* usbd_do_request_flags and usbd_do_request
*
* Description of arguments passed to these functions:
*
* "udev" - this is the "usb_device" structure pointer on which the
* request should be performed. It is possible to call this function
* in both Host Side mode and Device Side mode.
*
* "mtx" - if this argument is non-NULL the mutex pointed to by it
* will get dropped and picked up during the execution of this
* function, hence this function sometimes needs to sleep. If this
* argument is NULL it has no effect.
*
* "req" - this argument must always be non-NULL and points to an
* 8-byte structure holding the USB request to be done. The USB
* request structure has a bit telling the direction of the USB
* request, if it is a read or a write.
*
* "data" - if the "wLength" part of the structure pointed to by "req"
* is non-zero this argument must point to a valid kernel buffer which
* can hold at least "wLength" bytes. If "wLength" is zero "data" can
* be NULL.
*
* "flags" - here is a list of valid flags:
*
* o USB_SHORT_XFER_OK: allows the data transfer to be shorter than
* specified
*
* o USB_DELAY_STATUS_STAGE: allows the status stage to be performed
* at a later point in time. This is tunable by the "hw.usb.ss_delay"
* sysctl. This flag is mostly useful for debugging.
*
* o USB_USER_DATA_PTR: treat the "data" pointer like a userland
* pointer.
*
* "actlen" - if non-NULL the actual transfer length will be stored in
* the 16-bit unsigned integer pointed to by "actlen". This
* information is mostly useful when the "USB_SHORT_XFER_OK" flag is
* used.
*
* "timeout" - gives the timeout for the control transfer in
* milliseconds. A "timeout" value less than 50 milliseconds is
* treated like a 50 millisecond timeout. A "timeout" value greater
* than 30 seconds is treated like a 30 second timeout. This USB stack
* does not allow control requests without a timeout.
*
* NOTE: This function is thread safe. All calls to "usbd_do_request_flags"
* will be serialized by the use of the USB device enumeration lock.
*
* Returns:
* 0: Success
* Else: Failure
*------------------------------------------------------------------------*/
usb_error_t
usbd_do_request_flags(struct usb_device *udev, struct mtx *mtx,
struct usb_device_request *req, void *data, uint16_t flags,
uint16_t *actlen, usb_timeout_t timeout)
{
#ifdef USB_REQ_DEBUG
struct usb_ctrl_debug_bits dbg;
#endif
usb_handle_req_t *hr_func;
struct usb_xfer *xfer;
const void *desc;
int err = 0;
usb_ticks_t start_ticks;
usb_ticks_t delta_ticks;
usb_ticks_t max_ticks;
uint16_t length;
uint16_t temp;
uint16_t acttemp;
uint8_t do_unlock;
if (timeout < 50) {
/* timeout is too small */
timeout = 50;
}
if (timeout > 30000) {
/* timeout is too big */
timeout = 30000;
}
length = UGETW(req->wLength);
DPRINTFN(5, "udev=%p bmRequestType=0x%02x bRequest=0x%02x "
"wValue=0x%02x%02x wIndex=0x%02x%02x wLength=0x%02x%02x\n",
udev, req->bmRequestType, req->bRequest,
req->wValue[1], req->wValue[0],
req->wIndex[1], req->wIndex[0],
req->wLength[1], req->wLength[0]);
/* Check if the device is still alive */
if (udev->state < USB_STATE_POWERED) {
DPRINTF("usb device has gone\n");
return (USB_ERR_NOT_CONFIGURED);
}
/*
* Set "actlen" to a known value in case the caller does not
* check the return value:
*/
if (actlen)
*actlen = 0;
#if (USB_HAVE_USER_IO == 0)
if (flags & USB_USER_DATA_PTR)
return (USB_ERR_INVAL);
#endif
if ((mtx != NULL) && (mtx != &Giant)) {
USB_MTX_UNLOCK(mtx);
USB_MTX_ASSERT(mtx, MA_NOTOWNED);
}
/*
* Serialize access to this function:
*/
do_unlock = usbd_ctrl_lock(udev);
hr_func = usbd_get_hr_func(udev);
if (hr_func != NULL) {
DPRINTF("Handle Request function is set\n");
desc = NULL;
temp = 0;
if (!(req->bmRequestType & UT_READ)) {
if (length != 0) {
DPRINTFN(1, "The handle request function "
"does not support writing data!\n");
err = USB_ERR_INVAL;
goto done;
}
}
/* The root HUB code needs the BUS lock locked */
USB_BUS_LOCK(udev->bus);
err = (hr_func) (udev, req, &desc, &temp);
USB_BUS_UNLOCK(udev->bus);
if (err)
goto done;
if (length > temp) {
if (!(flags & USB_SHORT_XFER_OK)) {
err = USB_ERR_SHORT_XFER;
goto done;
}
length = temp;
}
if (actlen)
*actlen = length;
if (length > 0) {
#if USB_HAVE_USER_IO
if (flags & USB_USER_DATA_PTR) {
if (copyout(desc, data, length)) {
err = USB_ERR_INVAL;
goto done;
}
} else
#endif
memcpy(data, desc, length);
}
goto done; /* success */
}
/*
* Setup a new USB transfer or use the existing one, if any:
*/
usbd_ctrl_transfer_setup(udev);
xfer = udev->ctrl_xfer[0];
if (xfer == NULL) {
/* most likely out of memory */
err = USB_ERR_NOMEM;
goto done;
}
#ifdef USB_REQ_DEBUG
/* Get debug bits */
usbd_get_debug_bits(udev, req, &dbg);
/* Check for fault injection */
if (dbg.enabled)
flags |= USB_DELAY_STATUS_STAGE;
#endif
USB_XFER_LOCK(xfer);
if (flags & USB_DELAY_STATUS_STAGE)
xfer->flags.manual_status = 1;
else
xfer->flags.manual_status = 0;
if (flags & USB_SHORT_XFER_OK)
xfer->flags.short_xfer_ok = 1;
else
xfer->flags.short_xfer_ok = 0;
xfer->timeout = timeout;
start_ticks = ticks;
max_ticks = USB_MS_TO_TICKS(timeout);
usbd_copy_in(xfer->frbuffers, 0, req, sizeof(*req));
usbd_xfer_set_frame_len(xfer, 0, sizeof(*req));
while (1) {
temp = length;
if (temp > usbd_xfer_max_len(xfer)) {
temp = usbd_xfer_max_len(xfer);
}
#ifdef USB_REQ_DEBUG
if (xfer->flags.manual_status) {
if (usbd_xfer_frame_len(xfer, 0) != 0) {
/* Execute data stage separately */
temp = 0;
} else if (temp > 0) {
if (dbg.ds_fail) {
err = USB_ERR_INVAL;
break;
}
if (dbg.ds_delay > 0) {
usb_pause_mtx(
xfer->xroot->xfer_mtx,
USB_MS_TO_TICKS(dbg.ds_delay));
/* make sure we don't time out */
start_ticks = ticks;
}
}
}
#endif
usbd_xfer_set_frame_len(xfer, 1, temp);
if (temp > 0) {
if (!(req->bmRequestType & UT_READ)) {
#if USB_HAVE_USER_IO
if (flags & USB_USER_DATA_PTR) {
USB_XFER_UNLOCK(xfer);
err = usbd_copy_in_user(xfer->frbuffers + 1,
0, data, temp);
USB_XFER_LOCK(xfer);
if (err) {
err = USB_ERR_INVAL;
break;
}
} else
#endif
usbd_copy_in(xfer->frbuffers + 1,
0, data, temp);
}
usbd_xfer_set_frames(xfer, 2);
} else {
if (usbd_xfer_frame_len(xfer, 0) == 0) {
if (xfer->flags.manual_status) {
#ifdef USB_REQ_DEBUG
if (dbg.ss_fail) {
err = USB_ERR_INVAL;
break;
}
if (dbg.ss_delay > 0) {
usb_pause_mtx(
xfer->xroot->xfer_mtx,
USB_MS_TO_TICKS(dbg.ss_delay));
/* make sure we don't time out */
start_ticks = ticks;
}
#endif
xfer->flags.manual_status = 0;
} else {
break;
}
}
usbd_xfer_set_frames(xfer, 1);
}
usbd_transfer_start(xfer);
while (usbd_transfer_pending(xfer)) {
cv_wait(&udev->ctrlreq_cv,
xfer->xroot->xfer_mtx);
}
err = xfer->error;
if (err) {
break;
}
/* get actual length of DATA stage */
if (xfer->aframes < 2) {
acttemp = 0;
} else {
acttemp = usbd_xfer_frame_len(xfer, 1);
}
/* check for short packet */
if (temp > acttemp) {
temp = acttemp;
length = temp;
}
if (temp > 0) {
if (req->bmRequestType & UT_READ) {
#if USB_HAVE_USER_IO
if (flags & USB_USER_DATA_PTR) {
USB_XFER_UNLOCK(xfer);
err = usbd_copy_out_user(xfer->frbuffers + 1,
0, data, temp);
USB_XFER_LOCK(xfer);
if (err) {
err = USB_ERR_INVAL;
break;
}
} else
#endif
usbd_copy_out(xfer->frbuffers + 1,
0, data, temp);
}
}
/*
* Clear "frlengths[0]" so that we don't send the setup
* packet again:
*/
usbd_xfer_set_frame_len(xfer, 0, 0);
/* update length and data pointer */
length -= temp;
data = USB_ADD_BYTES(data, temp);
if (actlen) {
(*actlen) += temp;
}
/* check for timeout */
delta_ticks = ticks - start_ticks;
if (delta_ticks > max_ticks) {
if (!err) {
err = USB_ERR_TIMEOUT;
}
}
if (err) {
break;
}
}
if (err) {
/*
* Make sure that the control endpoint is no longer
* blocked in case of a non-transfer related error:
*/
usbd_transfer_stop(xfer);
}
USB_XFER_UNLOCK(xfer);
done:
if (do_unlock)
usbd_ctrl_unlock(udev);
if ((mtx != NULL) && (mtx != &Giant))
USB_MTX_LOCK(mtx);
switch (err) {
case USB_ERR_NORMAL_COMPLETION:
case USB_ERR_SHORT_XFER:
case USB_ERR_STALLED:
case USB_ERR_CANCELLED:
break;
default:
DPRINTF("error=%s - waiting a bit for TT cleanup\n",
usbd_errstr(err));
usb_pause_mtx(mtx, hz / 16);
break;
}
return ((usb_error_t)err);
}
/*------------------------------------------------------------------------*
* usbd_do_request_proc - factored out code
*
* This function is factored out code. It does basically the same like
* usbd_do_request_flags, except it will check the status of the
* passed process argument before doing the USB request. If the
* process is draining the USB_ERR_IOERROR code will be returned. It
* is assumed that the mutex associated with the process is locked
* when calling this function.
*------------------------------------------------------------------------*/
usb_error_t
usbd_do_request_proc(struct usb_device *udev, struct usb_process *pproc,
struct usb_device_request *req, void *data, uint16_t flags,
uint16_t *actlen, usb_timeout_t timeout)
{
usb_error_t err;
uint16_t len;
/* get request data length */
len = UGETW(req->wLength);
/* check if the device is being detached */
if (usb_proc_is_gone(pproc)) {
err = USB_ERR_IOERROR;
goto done;
}
/* forward the USB request */
err = usbd_do_request_flags(udev, pproc->up_mtx,
req, data, flags, actlen, timeout);
done:
/* on failure we zero the data */
/* on short packet we zero the unused data */
if ((len != 0) && (req->bmRequestType & UE_DIR_IN)) {
if (err)
memset(data, 0, len);
else if (actlen && *actlen != len)
memset(((uint8_t *)data) + *actlen, 0, len - *actlen);
}
return (err);
}
/*------------------------------------------------------------------------*
* usbd_req_reset_port
*
* This function will instruct a USB HUB to perform a reset sequence
* on the specified port number.
*
* Returns:
* 0: Success. The USB device should now be at address zero.
* Else: Failure. No USB device is present and the USB port should be
* disabled.
*------------------------------------------------------------------------*/
usb_error_t
usbd_req_reset_port(struct usb_device *udev, struct mtx *mtx, uint8_t port)
{
struct usb_port_status ps;
usb_error_t err;
uint16_t n;
uint16_t status;
uint16_t change;
DPRINTF("\n");
/* clear any leftover port reset changes first */
usbd_req_clear_port_feature(
udev, mtx, port, UHF_C_PORT_RESET);
/* assert port reset on the given port */
err = usbd_req_set_port_feature(
udev, mtx, port, UHF_PORT_RESET);
/* check for errors */
if (err)
goto done;
n = 0;
while (1) {
/* wait for the device to recover from reset */
usb_pause_mtx(mtx, USB_MS_TO_TICKS(usb_port_reset_delay));
n += usb_port_reset_delay;
err = usbd_req_get_port_status(udev, mtx, &ps, port);
if (err)
goto done;
status = UGETW(ps.wPortStatus);
change = UGETW(ps.wPortChange);
/* if the device disappeared, just give up */
if (!(status & UPS_CURRENT_CONNECT_STATUS))
goto done;
/* check if reset is complete */
if (change & UPS_C_PORT_RESET)
break;
/*
* Some Virtual Machines like VirtualBox 4.x fail to
* generate a port reset change event. Check if reset
* is no longer asserted.
*/
if (!(status & UPS_RESET))
break;
/* check for timeout */
if (n > 1000) {
n = 0;
break;
}
}
/* clear port reset first */
err = usbd_req_clear_port_feature(
udev, mtx, port, UHF_C_PORT_RESET);
if (err)
goto done;
/* check for timeout */
if (n == 0) {
err = USB_ERR_TIMEOUT;
goto done;
}
/* wait for the device to recover from reset */
usb_pause_mtx(mtx, USB_MS_TO_TICKS(usb_port_reset_recovery));
done:
DPRINTFN(2, "port %d reset returning error=%s\n",
port, usbd_errstr(err));
return (err);
}
/*------------------------------------------------------------------------*
* usbd_req_warm_reset_port
*
* This function will instruct an USB HUB to perform a warm reset
* sequence on the specified port number. This kind of reset is not
* mandatory for LOW-, FULL- and HIGH-speed USB HUBs and is targeted
* for SUPER-speed USB HUBs.
*
* Returns:
* 0: Success. The USB device should now be available again.
* Else: Failure. No USB device is present and the USB port should be
* disabled.
*------------------------------------------------------------------------*/
usb_error_t
usbd_req_warm_reset_port(struct usb_device *udev, struct mtx *mtx,
uint8_t port)
{
struct usb_port_status ps;
usb_error_t err;
uint16_t n;
uint16_t status;
uint16_t change;
DPRINTF("\n");
err = usbd_req_get_port_status(udev, mtx, &ps, port);
if (err)
goto done;
status = UGETW(ps.wPortStatus);
switch (UPS_PORT_LINK_STATE_GET(status)) {
case UPS_PORT_LS_U3:
case UPS_PORT_LS_COMP_MODE:
case UPS_PORT_LS_LOOPBACK:
case UPS_PORT_LS_SS_INA:
break;
default:
DPRINTF("Wrong state for warm reset\n");
return (0);
}
/* clear any leftover warm port reset changes first */
usbd_req_clear_port_feature(udev, mtx,
port, UHF_C_BH_PORT_RESET);
/* set warm port reset */
err = usbd_req_set_port_feature(udev, mtx,
port, UHF_BH_PORT_RESET);
if (err)
goto done;
n = 0;
while (1) {
/* wait for the device to recover from reset */
usb_pause_mtx(mtx, USB_MS_TO_TICKS(usb_port_reset_delay));
n += usb_port_reset_delay;
err = usbd_req_get_port_status(udev, mtx, &ps, port);
if (err)
goto done;
status = UGETW(ps.wPortStatus);
change = UGETW(ps.wPortChange);
/* if the device disappeared, just give up */
if (!(status & UPS_CURRENT_CONNECT_STATUS))
goto done;
/* check if reset is complete */
if (change & UPS_C_BH_PORT_RESET)
break;
/* check for timeout */
if (n > 1000) {
n = 0;
break;
}
}
/* clear port reset first */
err = usbd_req_clear_port_feature(
udev, mtx, port, UHF_C_BH_PORT_RESET);
if (err)
goto done;
/* check for timeout */
if (n == 0) {
err = USB_ERR_TIMEOUT;
goto done;
}
/* wait for the device to recover from reset */
usb_pause_mtx(mtx, USB_MS_TO_TICKS(usb_port_reset_recovery));
done:
DPRINTFN(2, "port %d warm reset returning error=%s\n",
port, usbd_errstr(err));
return (err);
}
/*------------------------------------------------------------------------*
* usbd_req_get_desc
*
* This function can be used to retrieve USB descriptors. It contains
* some additional logic like zeroing of missing descriptor bytes and
* retrying an USB descriptor in case of failure. The "min_len"
* argument specifies the minimum descriptor length. The "max_len"
* argument specifies the maximum descriptor length. If the real
* descriptor length is less than the minimum length the missing
* byte(s) will be zeroed. The type field, the second byte of the USB
* descriptor, will get forced to the correct type. If the "actlen"
* pointer is non-NULL, the actual length of the transfer will get
* stored in the 16-bit unsigned integer which it is pointing to. The
* first byte of the descriptor will not get updated. If the "actlen"
* pointer is NULL the first byte of the descriptor will get updated
* to reflect the actual length instead. If "min_len" is not equal to
* "max_len" then this function will try to retrive the beginning of
* the descriptor and base the maximum length on the first byte of the
* descriptor.
*
* Returns:
* 0: Success
* Else: Failure
*------------------------------------------------------------------------*/
usb_error_t
usbd_req_get_desc(struct usb_device *udev,
struct mtx *mtx, uint16_t *actlen, void *desc,
uint16_t min_len, uint16_t max_len,
uint16_t id, uint8_t type, uint8_t index,
uint8_t retries)
{
struct usb_device_request req;
uint8_t *buf = desc;
usb_error_t err;
DPRINTFN(4, "id=%d, type=%d, index=%d, max_len=%d\n",
id, type, index, max_len);
req.bmRequestType = UT_READ_DEVICE;
req.bRequest = UR_GET_DESCRIPTOR;
USETW2(req.wValue, type, index);
USETW(req.wIndex, id);
while (1) {
if ((min_len < 2) || (max_len < 2)) {
err = USB_ERR_INVAL;
goto done;
}
USETW(req.wLength, min_len);
err = usbd_do_request_flags(udev, mtx, &req,
desc, 0, NULL, 1000 /* ms */);
if (err != 0 && err != USB_ERR_TIMEOUT &&
min_len != max_len) {
/* clear descriptor data */
memset(desc, 0, max_len);
/* try to read full descriptor length */
USETW(req.wLength, max_len);
err = usbd_do_request_flags(udev, mtx, &req,
desc, USB_SHORT_XFER_OK, NULL, 1000 /* ms */);
if (err == 0) {
/* verify length */
if (buf[0] > max_len)
buf[0] = max_len;
else if (buf[0] < 2)
err = USB_ERR_INVAL;
min_len = buf[0];
/* enforce descriptor type */
buf[1] = type;
goto done;
}
}
if (err) {
if (!retries) {
goto done;
}
retries--;
usb_pause_mtx(mtx, hz / 5);
continue;
}
if (min_len == max_len) {
/* enforce correct length */
if ((buf[0] > min_len) && (actlen == NULL))
buf[0] = min_len;
/* enforce correct type */
buf[1] = type;
goto done;
}
/* range check */
if (max_len > buf[0]) {
max_len = buf[0];
}
/* zero minimum data */
while (min_len > max_len) {
min_len--;
buf[min_len] = 0;
}
/* set new minimum length */
min_len = max_len;
}
done:
if (actlen != NULL) {
if (err)
*actlen = 0;
else
*actlen = min_len;
}
return (err);
}
/*------------------------------------------------------------------------*
* usbd_req_get_string_any
*
* This function will return the string given by "string_index"
* using the first language ID. The maximum length "len" includes
* the terminating zero. The "len" argument should be twice as
* big pluss 2 bytes, compared with the actual maximum string length !
*
* Returns:
* 0: Success
* Else: Failure
*------------------------------------------------------------------------*/
usb_error_t
usbd_req_get_string_any(struct usb_device *udev, struct mtx *mtx, char *buf,
uint16_t len, uint8_t string_index)
{
char *s;
uint8_t *temp;
uint16_t i;
uint16_t n;
uint16_t c;
uint8_t swap;
usb_error_t err;
if (len == 0) {
/* should not happen */
return (USB_ERR_NORMAL_COMPLETION);
}
if (string_index == 0) {
/* this is the language table */
buf[0] = 0;
return (USB_ERR_INVAL);
}
if (udev->flags.no_strings) {
buf[0] = 0;
return (USB_ERR_STALLED);
}
err = usbd_req_get_string_desc
(udev, mtx, buf, len, udev->langid, string_index);
if (err) {
buf[0] = 0;
return (err);
}
temp = (uint8_t *)buf;
if (temp[0] < 2) {
/* string length is too short */
buf[0] = 0;
return (USB_ERR_INVAL);
}
/* reserve one byte for terminating zero */
len--;
/* find maximum length */
s = buf;
n = (temp[0] / 2) - 1;
if (n > len) {
n = len;
}
/* skip descriptor header */
temp += 2;
/* reset swap state */
swap = 3;
/* convert and filter */
for (i = 0; (i != n); i++) {
c = UGETW(temp + (2 * i));
/* convert from Unicode, handle buggy strings */
if (((c & 0xff00) == 0) && (swap & 1)) {
/* Little Endian, default */
*s = c;
swap = 1;
} else if (((c & 0x00ff) == 0) && (swap & 2)) {
/* Big Endian */
*s = c >> 8;
swap = 2;
} else {
/* silently skip bad character */
continue;
}
/*
* Filter by default - We only allow alphanumerical
* and a few more to avoid any problems with scripts
* and daemons.
*/
if (isalpha(*s) ||
isdigit(*s) ||
*s == '-' ||
*s == '+' ||
*s == ' ' ||
*s == '.' ||
*s == ',' ||
*s == ':' ||
*s == '/' ||
*s == '(' ||
*s == ')') {
/* allowed */
s++;
}
/* silently skip bad character */
}
*s = 0; /* zero terminate resulting string */
return (USB_ERR_NORMAL_COMPLETION);
}
/*------------------------------------------------------------------------*
* usbd_req_get_string_desc
*
* If you don't know the language ID, consider using
* "usbd_req_get_string_any()".
*
* Returns:
* 0: Success
* Else: Failure
*------------------------------------------------------------------------*/
usb_error_t
usbd_req_get_string_desc(struct usb_device *udev, struct mtx *mtx, void *sdesc,
uint16_t max_len, uint16_t lang_id,
uint8_t string_index)
{
return (usbd_req_get_desc(udev, mtx, NULL, sdesc, 2, max_len, lang_id,
UDESC_STRING, string_index, 0));
}
/*------------------------------------------------------------------------*
* usbd_req_get_config_desc_ptr
*
* This function is used in device side mode to retrieve the pointer
* to the generated config descriptor. This saves allocating space for
* an additional config descriptor when setting the configuration.
*
* Returns:
* 0: Success
* Else: Failure
*------------------------------------------------------------------------*/
usb_error_t
usbd_req_get_descriptor_ptr(struct usb_device *udev,
struct usb_config_descriptor **ppcd, uint16_t wValue)
{
struct usb_device_request req;
usb_handle_req_t *hr_func;
const void *ptr;
uint16_t len;
usb_error_t err;
req.bmRequestType = UT_READ_DEVICE;
req.bRequest = UR_GET_DESCRIPTOR;
USETW(req.wValue, wValue);
USETW(req.wIndex, 0);
USETW(req.wLength, 0);
ptr = NULL;
len = 0;
hr_func = usbd_get_hr_func(udev);
if (hr_func == NULL)
err = USB_ERR_INVAL;
else {
USB_BUS_LOCK(udev->bus);
err = (hr_func) (udev, &req, &ptr, &len);
USB_BUS_UNLOCK(udev->bus);
}
if (err)
ptr = NULL;
else if (ptr == NULL)
err = USB_ERR_INVAL;
*ppcd = __DECONST(struct usb_config_descriptor *, ptr);
return (err);
}
/*------------------------------------------------------------------------*
* usbd_req_get_config_desc
*
* Returns:
* 0: Success
* Else: Failure
*------------------------------------------------------------------------*/
usb_error_t
usbd_req_get_config_desc(struct usb_device *udev, struct mtx *mtx,
struct usb_config_descriptor *d, uint8_t conf_index)
{
usb_error_t err;
DPRINTFN(4, "confidx=%d\n", conf_index);
err = usbd_req_get_desc(udev, mtx, NULL, d, sizeof(*d),
sizeof(*d), 0, UDESC_CONFIG, conf_index, 0);
if (err) {
goto done;
}
/* Extra sanity checking */
if (UGETW(d->wTotalLength) < (uint16_t)sizeof(*d)) {
err = USB_ERR_INVAL;
}
done:
return (err);
}
/*------------------------------------------------------------------------*
* usbd_alloc_config_desc
*
* This function is used to allocate a zeroed configuration
* descriptor.
*
* Returns:
* NULL: Failure
* Else: Success
*------------------------------------------------------------------------*/
void *
usbd_alloc_config_desc(struct usb_device *udev, uint32_t size)
{
if (size > USB_CONFIG_MAX) {
DPRINTF("Configuration descriptor too big\n");
return (NULL);
}
#if (USB_HAVE_FIXED_CONFIG == 0)
return (malloc(size, M_USBDEV, M_ZERO | M_WAITOK));
#else
memset(udev->config_data, 0, sizeof(udev->config_data));
return (udev->config_data);
#endif
}
/*------------------------------------------------------------------------*
* usbd_alloc_config_desc
*
* This function is used to free a configuration descriptor.
*------------------------------------------------------------------------*/
void
usbd_free_config_desc(struct usb_device *udev, void *ptr)
{
#if (USB_HAVE_FIXED_CONFIG == 0)
free(ptr, M_USBDEV);
#endif
}
/*------------------------------------------------------------------------*
* usbd_req_get_config_desc_full
*
* This function gets the complete USB configuration descriptor and
* ensures that "wTotalLength" is correct. The returned configuration
* descriptor is freed by calling "usbd_free_config_desc()".
*
* Returns:
* 0: Success
* Else: Failure
*------------------------------------------------------------------------*/
usb_error_t
usbd_req_get_config_desc_full(struct usb_device *udev, struct mtx *mtx,
struct usb_config_descriptor **ppcd, uint8_t index)
{
struct usb_config_descriptor cd;
struct usb_config_descriptor *cdesc;
uint32_t len;
usb_error_t err;
DPRINTFN(4, "index=%d\n", index);
*ppcd = NULL;
err = usbd_req_get_config_desc(udev, mtx, &cd, index);
if (err)
return (err);
/* get full descriptor */
len = UGETW(cd.wTotalLength);
if (len < (uint32_t)sizeof(*cdesc)) {
/* corrupt descriptor */
return (USB_ERR_INVAL);
} else if (len > USB_CONFIG_MAX) {
DPRINTF("Configuration descriptor was truncated\n");
len = USB_CONFIG_MAX;
}
cdesc = usbd_alloc_config_desc(udev, len);
if (cdesc == NULL)
return (USB_ERR_NOMEM);
err = usbd_req_get_desc(udev, mtx, NULL, cdesc, len, len, 0,
UDESC_CONFIG, index, 3);
if (err) {
usbd_free_config_desc(udev, cdesc);
return (err);
}
/* make sure that the device is not fooling us: */
USETW(cdesc->wTotalLength, len);
*ppcd = cdesc;
return (0); /* success */
}
/*------------------------------------------------------------------------*
* usbd_req_get_device_desc
*
* Returns:
* 0: Success
* Else: Failure
*------------------------------------------------------------------------*/
usb_error_t
usbd_req_get_device_desc(struct usb_device *udev, struct mtx *mtx,
struct usb_device_descriptor *d)
{
DPRINTFN(4, "\n");
return (usbd_req_get_desc(udev, mtx, NULL, d, sizeof(*d),
sizeof(*d), 0, UDESC_DEVICE, 0, 3));
}
/*------------------------------------------------------------------------*
* usbd_req_get_alt_interface_no
*
* Returns:
* 0: Success
* Else: Failure
*------------------------------------------------------------------------*/
usb_error_t
usbd_req_get_alt_interface_no(struct usb_device *udev, struct mtx *mtx,
uint8_t *alt_iface_no, uint8_t iface_index)
{
struct usb_interface *iface = usbd_get_iface(udev, iface_index);
struct usb_device_request req;
if ((iface == NULL) || (iface->idesc == NULL))
return (USB_ERR_INVAL);
req.bmRequestType = UT_READ_INTERFACE;
req.bRequest = UR_GET_INTERFACE;
USETW(req.wValue, 0);
req.wIndex[0] = iface->idesc->bInterfaceNumber;
req.wIndex[1] = 0;
USETW(req.wLength, 1);
return (usbd_do_request(udev, mtx, &req, alt_iface_no));
}
/*------------------------------------------------------------------------*
* usbd_req_set_alt_interface_no
*
* Returns:
* 0: Success
* Else: Failure
*------------------------------------------------------------------------*/
usb_error_t
usbd_req_set_alt_interface_no(struct usb_device *udev, struct mtx *mtx,
uint8_t iface_index, uint8_t alt_no)
{
struct usb_interface *iface = usbd_get_iface(udev, iface_index);
struct usb_device_request req;
usb_error_t err;
if ((iface == NULL) || (iface->idesc == NULL))
return (USB_ERR_INVAL);
req.bmRequestType = UT_WRITE_INTERFACE;
req.bRequest = UR_SET_INTERFACE;
req.wValue[0] = alt_no;
req.wValue[1] = 0;
req.wIndex[0] = iface->idesc->bInterfaceNumber;
req.wIndex[1] = 0;
USETW(req.wLength, 0);
err = usbd_do_request(udev, mtx, &req, 0);
if (err == USB_ERR_STALLED && iface->num_altsetting == 1) {
/*
* The USB specification chapter 9.4.10 says that USB
* devices having only one alternate setting are
* allowed to STALL this request. Ignore this failure.
*/
err = 0;
DPRINTF("Setting default alternate number failed. (ignored)\n");
}
return (err);
}
/*------------------------------------------------------------------------*
* usbd_req_get_device_status
*
* Returns:
* 0: Success
* Else: Failure
*------------------------------------------------------------------------*/
usb_error_t
usbd_req_get_device_status(struct usb_device *udev, struct mtx *mtx,
struct usb_status *st)
{
struct usb_device_request req;
req.bmRequestType = UT_READ_DEVICE;
req.bRequest = UR_GET_STATUS;
USETW(req.wValue, 0);
USETW(req.wIndex, 0);
USETW(req.wLength, sizeof(*st));
return (usbd_do_request(udev, mtx, &req, st));
}
/*------------------------------------------------------------------------*
* usbd_req_get_hub_descriptor
*
* Returns:
* 0: Success
* Else: Failure
*------------------------------------------------------------------------*/
usb_error_t
usbd_req_get_hub_descriptor(struct usb_device *udev, struct mtx *mtx,
struct usb_hub_descriptor *hd, uint8_t nports)
{
struct usb_device_request req;
uint16_t len = (nports + 7 + (8 * 8)) / 8;
req.bmRequestType = UT_READ_CLASS_DEVICE;
req.bRequest = UR_GET_DESCRIPTOR;
USETW2(req.wValue, UDESC_HUB, 0);
USETW(req.wIndex, 0);
USETW(req.wLength, len);
return (usbd_do_request(udev, mtx, &req, hd));
}
/*------------------------------------------------------------------------*
* usbd_req_get_ss_hub_descriptor
*
* Returns:
* 0: Success
* Else: Failure
*------------------------------------------------------------------------*/
usb_error_t
usbd_req_get_ss_hub_descriptor(struct usb_device *udev, struct mtx *mtx,
struct usb_hub_ss_descriptor *hd, uint8_t nports)
{
struct usb_device_request req;
uint16_t len = sizeof(*hd) - 32 + 1 + ((nports + 7) / 8);
req.bmRequestType = UT_READ_CLASS_DEVICE;
req.bRequest = UR_GET_DESCRIPTOR;
USETW2(req.wValue, UDESC_SS_HUB, 0);
USETW(req.wIndex, 0);
USETW(req.wLength, len);
return (usbd_do_request(udev, mtx, &req, hd));
}
/*------------------------------------------------------------------------*
* usbd_req_get_hub_status
*
* Returns:
* 0: Success
* Else: Failure
*------------------------------------------------------------------------*/
usb_error_t
usbd_req_get_hub_status(struct usb_device *udev, struct mtx *mtx,
struct usb_hub_status *st)
{
struct usb_device_request req;
req.bmRequestType = UT_READ_CLASS_DEVICE;
req.bRequest = UR_GET_STATUS;
USETW(req.wValue, 0);
USETW(req.wIndex, 0);
USETW(req.wLength, sizeof(struct usb_hub_status));
return (usbd_do_request(udev, mtx, &req, st));
}
/*------------------------------------------------------------------------*
* usbd_req_set_address
*
* This function is used to set the address for an USB device. After
* port reset the USB device will respond at address zero.
*
* Returns:
* 0: Success
* Else: Failure
*------------------------------------------------------------------------*/
usb_error_t
usbd_req_set_address(struct usb_device *udev, struct mtx *mtx, uint16_t addr)
{
struct usb_device_request req;
usb_error_t err;
DPRINTFN(6, "setting device address=%d\n", addr);
req.bmRequestType = UT_WRITE_DEVICE;
req.bRequest = UR_SET_ADDRESS;
USETW(req.wValue, addr);
USETW(req.wIndex, 0);
USETW(req.wLength, 0);
err = USB_ERR_INVAL;
/* check if USB controller handles set address */
if (udev->bus->methods->set_address != NULL)
err = (udev->bus->methods->set_address) (udev, mtx, addr);
if (err != USB_ERR_INVAL)
goto done;
/* Setting the address should not take more than 1 second ! */
err = usbd_do_request_flags(udev, mtx, &req, NULL,
USB_DELAY_STATUS_STAGE, NULL, 1000);
done:
/* allow device time to set new address */
usb_pause_mtx(mtx,
USB_MS_TO_TICKS(usb_set_address_settle));
return (err);
}
/*------------------------------------------------------------------------*
* usbd_req_get_port_status
*
* Returns:
* 0: Success
* Else: Failure
*------------------------------------------------------------------------*/
usb_error_t
usbd_req_get_port_status(struct usb_device *udev, struct mtx *mtx,
struct usb_port_status *ps, uint8_t port)
{
struct usb_device_request req;
req.bmRequestType = UT_READ_CLASS_OTHER;
req.bRequest = UR_GET_STATUS;
USETW(req.wValue, 0);
req.wIndex[0] = port;
req.wIndex[1] = 0;
USETW(req.wLength, sizeof(*ps));
return (usbd_do_request_flags(udev, mtx, &req, ps, 0, NULL, 1000));
}
/*------------------------------------------------------------------------*
* usbd_req_clear_hub_feature
*
* Returns:
* 0: Success
* Else: Failure
*------------------------------------------------------------------------*/
usb_error_t
usbd_req_clear_hub_feature(struct usb_device *udev, struct mtx *mtx,
uint16_t sel)
{
struct usb_device_request req;
req.bmRequestType = UT_WRITE_CLASS_DEVICE;
req.bRequest = UR_CLEAR_FEATURE;
USETW(req.wValue, sel);
USETW(req.wIndex, 0);
USETW(req.wLength, 0);
return (usbd_do_request(udev, mtx, &req, 0));
}
/*------------------------------------------------------------------------*
* usbd_req_set_hub_feature
*
* Returns:
* 0: Success
* Else: Failure
*------------------------------------------------------------------------*/
usb_error_t
usbd_req_set_hub_feature(struct usb_device *udev, struct mtx *mtx,
uint16_t sel)
{
struct usb_device_request req;
req.bmRequestType = UT_WRITE_CLASS_DEVICE;
req.bRequest = UR_SET_FEATURE;
USETW(req.wValue, sel);
USETW(req.wIndex, 0);
USETW(req.wLength, 0);
return (usbd_do_request(udev, mtx, &req, 0));
}
/*------------------------------------------------------------------------*
* usbd_req_set_hub_u1_timeout
*
* Returns:
* 0: Success
* Else: Failure
*------------------------------------------------------------------------*/
usb_error_t
usbd_req_set_hub_u1_timeout(struct usb_device *udev, struct mtx *mtx,
uint8_t port, uint8_t timeout)
{
struct usb_device_request req;
req.bmRequestType = UT_WRITE_CLASS_OTHER;
req.bRequest = UR_SET_FEATURE;
USETW(req.wValue, UHF_PORT_U1_TIMEOUT);
req.wIndex[0] = port;
req.wIndex[1] = timeout;
USETW(req.wLength, 0);
return (usbd_do_request(udev, mtx, &req, 0));
}
/*------------------------------------------------------------------------*
* usbd_req_set_hub_u2_timeout
*
* Returns:
* 0: Success
* Else: Failure
*------------------------------------------------------------------------*/
usb_error_t
usbd_req_set_hub_u2_timeout(struct usb_device *udev, struct mtx *mtx,
uint8_t port, uint8_t timeout)
{
struct usb_device_request req;
req.bmRequestType = UT_WRITE_CLASS_OTHER;
req.bRequest = UR_SET_FEATURE;
USETW(req.wValue, UHF_PORT_U2_TIMEOUT);
req.wIndex[0] = port;
req.wIndex[1] = timeout;
USETW(req.wLength, 0);
return (usbd_do_request(udev, mtx, &req, 0));
}
/*------------------------------------------------------------------------*
* usbd_req_set_hub_depth
*
* Returns:
* 0: Success
* Else: Failure
*------------------------------------------------------------------------*/
usb_error_t
usbd_req_set_hub_depth(struct usb_device *udev, struct mtx *mtx,
uint16_t depth)
{
struct usb_device_request req;
req.bmRequestType = UT_WRITE_CLASS_DEVICE;
req.bRequest = UR_SET_HUB_DEPTH;
USETW(req.wValue, depth);
USETW(req.wIndex, 0);
USETW(req.wLength, 0);
return (usbd_do_request(udev, mtx, &req, 0));
}
/*------------------------------------------------------------------------*
* usbd_req_clear_port_feature
*
* Returns:
* 0: Success
* Else: Failure
*------------------------------------------------------------------------*/
usb_error_t
usbd_req_clear_port_feature(struct usb_device *udev, struct mtx *mtx,
uint8_t port, uint16_t sel)
{
struct usb_device_request req;
req.bmRequestType = UT_WRITE_CLASS_OTHER;
req.bRequest = UR_CLEAR_FEATURE;
USETW(req.wValue, sel);
req.wIndex[0] = port;
req.wIndex[1] = 0;
USETW(req.wLength, 0);
return (usbd_do_request(udev, mtx, &req, 0));
}
/*------------------------------------------------------------------------*
* usbd_req_set_port_feature
*
* Returns:
* 0: Success
* Else: Failure
*------------------------------------------------------------------------*/
usb_error_t
usbd_req_set_port_feature(struct usb_device *udev, struct mtx *mtx,
uint8_t port, uint16_t sel)
{
struct usb_device_request req;
req.bmRequestType = UT_WRITE_CLASS_OTHER;
req.bRequest = UR_SET_FEATURE;
USETW(req.wValue, sel);
req.wIndex[0] = port;
req.wIndex[1] = 0;
USETW(req.wLength, 0);
return (usbd_do_request(udev, mtx, &req, 0));
}
/*------------------------------------------------------------------------*
* usbd_req_set_protocol
*
* Returns:
* 0: Success
* Else: Failure
*------------------------------------------------------------------------*/
usb_error_t
usbd_req_set_protocol(struct usb_device *udev, struct mtx *mtx,
uint8_t iface_index, uint16_t report)
{
struct usb_interface *iface = usbd_get_iface(udev, iface_index);
struct usb_device_request req;
if ((iface == NULL) || (iface->idesc == NULL)) {
return (USB_ERR_INVAL);
}
DPRINTFN(5, "iface=%p, report=%d, endpt=%d\n",
iface, report, iface->idesc->bInterfaceNumber);
req.bmRequestType = UT_WRITE_CLASS_INTERFACE;
req.bRequest = UR_SET_PROTOCOL;
USETW(req.wValue, report);
req.wIndex[0] = iface->idesc->bInterfaceNumber;
req.wIndex[1] = 0;
USETW(req.wLength, 0);
return (usbd_do_request(udev, mtx, &req, 0));
}
/*------------------------------------------------------------------------*
* usbd_req_set_report
*
* Returns:
* 0: Success
* Else: Failure
*------------------------------------------------------------------------*/
usb_error_t
usbd_req_set_report(struct usb_device *udev, struct mtx *mtx, void *data, uint16_t len,
uint8_t iface_index, uint8_t type, uint8_t id)
{
struct usb_interface *iface = usbd_get_iface(udev, iface_index);
struct usb_device_request req;
if ((iface == NULL) || (iface->idesc == NULL)) {
return (USB_ERR_INVAL);
}
DPRINTFN(5, "len=%d\n", len);
req.bmRequestType = UT_WRITE_CLASS_INTERFACE;
req.bRequest = UR_SET_REPORT;
USETW2(req.wValue, type, id);
req.wIndex[0] = iface->idesc->bInterfaceNumber;
req.wIndex[1] = 0;
USETW(req.wLength, len);
return (usbd_do_request(udev, mtx, &req, data));
}
/*------------------------------------------------------------------------*
* usbd_req_get_report
*
* Returns:
* 0: Success
* Else: Failure
*------------------------------------------------------------------------*/
usb_error_t
usbd_req_get_report(struct usb_device *udev, struct mtx *mtx, void *data,
uint16_t len, uint8_t iface_index, uint8_t type, uint8_t id)
{
struct usb_interface *iface = usbd_get_iface(udev, iface_index);
struct usb_device_request req;
if ((iface == NULL) || (iface->idesc == NULL)) {
return (USB_ERR_INVAL);
}
DPRINTFN(5, "len=%d\n", len);
req.bmRequestType = UT_READ_CLASS_INTERFACE;
req.bRequest = UR_GET_REPORT;
USETW2(req.wValue, type, id);
req.wIndex[0] = iface->idesc->bInterfaceNumber;
req.wIndex[1] = 0;
USETW(req.wLength, len);
return (usbd_do_request(udev, mtx, &req, data));
}
/*------------------------------------------------------------------------*
* usbd_req_set_idle
*
* Returns:
* 0: Success
* Else: Failure
*------------------------------------------------------------------------*/
usb_error_t
usbd_req_set_idle(struct usb_device *udev, struct mtx *mtx,
uint8_t iface_index, uint8_t duration, uint8_t id)
{
struct usb_interface *iface = usbd_get_iface(udev, iface_index);
struct usb_device_request req;
if ((iface == NULL) || (iface->idesc == NULL)) {
return (USB_ERR_INVAL);
}
DPRINTFN(5, "%d %d\n", duration, id);
req.bmRequestType = UT_WRITE_CLASS_INTERFACE;
req.bRequest = UR_SET_IDLE;
USETW2(req.wValue, duration, id);
req.wIndex[0] = iface->idesc->bInterfaceNumber;
req.wIndex[1] = 0;
USETW(req.wLength, 0);
return (usbd_do_request(udev, mtx, &req, 0));
}
/*------------------------------------------------------------------------*
* usbd_req_get_report_descriptor
*
* Returns:
* 0: Success
* Else: Failure
*------------------------------------------------------------------------*/
usb_error_t
usbd_req_get_report_descriptor(struct usb_device *udev, struct mtx *mtx,
void *d, uint16_t size, uint8_t iface_index)
{
struct usb_interface *iface = usbd_get_iface(udev, iface_index);
struct usb_device_request req;
if ((iface == NULL) || (iface->idesc == NULL)) {
return (USB_ERR_INVAL);
}
req.bmRequestType = UT_READ_INTERFACE;
req.bRequest = UR_GET_DESCRIPTOR;
USETW2(req.wValue, UDESC_REPORT, 0); /* report id should be 0 */
req.wIndex[0] = iface->idesc->bInterfaceNumber;
req.wIndex[1] = 0;
USETW(req.wLength, size);
return (usbd_do_request(udev, mtx, &req, d));
}
/*------------------------------------------------------------------------*
* usbd_req_set_config
*
* This function is used to select the current configuration number in
* both USB device side mode and USB host side mode. When setting the
* configuration the function of the interfaces can change.
*
* Returns:
* 0: Success
* Else: Failure
*------------------------------------------------------------------------*/
usb_error_t
usbd_req_set_config(struct usb_device *udev, struct mtx *mtx, uint8_t conf)
{
struct usb_device_request req;
DPRINTF("setting config %d\n", conf);
/* do "set configuration" request */
req.bmRequestType = UT_WRITE_DEVICE;
req.bRequest = UR_SET_CONFIG;
req.wValue[0] = conf;
req.wValue[1] = 0;
USETW(req.wIndex, 0);
USETW(req.wLength, 0);
return (usbd_do_request(udev, mtx, &req, 0));
}
/*------------------------------------------------------------------------*
* usbd_req_get_config
*
* Returns:
* 0: Success
* Else: Failure
*------------------------------------------------------------------------*/
usb_error_t
usbd_req_get_config(struct usb_device *udev, struct mtx *mtx, uint8_t *pconf)
{
struct usb_device_request req;
req.bmRequestType = UT_READ_DEVICE;
req.bRequest = UR_GET_CONFIG;
USETW(req.wValue, 0);
USETW(req.wIndex, 0);
USETW(req.wLength, 1);
return (usbd_do_request(udev, mtx, &req, pconf));
}
/*------------------------------------------------------------------------*
* usbd_setup_device_desc
*------------------------------------------------------------------------*/
usb_error_t
usbd_setup_device_desc(struct usb_device *udev, struct mtx *mtx)
{
usb_error_t err;
/*
* Get the first 8 bytes of the device descriptor !
*
* NOTE: "usbd_do_request()" will check the device descriptor
* next time we do a request to see if the maximum packet size
* changed! The 8 first bytes of the device descriptor
* contains the maximum packet size to use on control endpoint
* 0. If this value is different from "USB_MAX_IPACKET" a new
* USB control request will be setup!
*/
switch (udev->speed) {
case USB_SPEED_FULL:
if (usb_full_ddesc != 0) {
/* get full device descriptor */
err = usbd_req_get_device_desc(udev, mtx, &udev->ddesc);
if (err == 0)
break;
}
/* get partial device descriptor, some devices crash on this */
err = usbd_req_get_desc(udev, mtx, NULL, &udev->ddesc,
USB_MAX_IPACKET, USB_MAX_IPACKET, 0, UDESC_DEVICE, 0, 0);
if (err != 0) {
DPRINTF("Trying fallback for getting the USB device descriptor\n");
/* try 8 bytes bMaxPacketSize */
udev->ddesc.bMaxPacketSize = 8;
/* get full device descriptor */
err = usbd_req_get_device_desc(udev, mtx, &udev->ddesc);
if (err == 0)
break;
/* try 16 bytes bMaxPacketSize */
udev->ddesc.bMaxPacketSize = 16;
/* get full device descriptor */
err = usbd_req_get_device_desc(udev, mtx, &udev->ddesc);
if (err == 0)
break;
/* try 32/64 bytes bMaxPacketSize */
udev->ddesc.bMaxPacketSize = 32;
}
/* get the full device descriptor */
err = usbd_req_get_device_desc(udev, mtx, &udev->ddesc);
break;
default:
DPRINTF("Minimum bMaxPacketSize is large enough "
"to hold the complete device descriptor or "
"only one bMaxPacketSize choice\n");
/* get the full device descriptor */
err = usbd_req_get_device_desc(udev, mtx, &udev->ddesc);
/* try one more time, if error */
if (err != 0)
err = usbd_req_get_device_desc(udev, mtx, &udev->ddesc);
break;
}
if (err != 0) {
DPRINTFN(0, "getting device descriptor "
"at addr %d failed, %s\n", udev->address,
usbd_errstr(err));
return (err);
}
DPRINTF("adding unit addr=%d, rev=%02x, class=%d, "
"subclass=%d, protocol=%d, maxpacket=%d, len=%d, speed=%d\n",
udev->address, UGETW(udev->ddesc.bcdUSB),
udev->ddesc.bDeviceClass,
udev->ddesc.bDeviceSubClass,
udev->ddesc.bDeviceProtocol,
udev->ddesc.bMaxPacketSize,
udev->ddesc.bLength,
udev->speed);
return (err);
}
/*------------------------------------------------------------------------*
* usbd_req_re_enumerate
*
* NOTE: After this function returns the hardware is in the
* unconfigured state! The application is responsible for setting a
* new configuration.
*
* Returns:
* 0: Success
* Else: Failure
*------------------------------------------------------------------------*/
usb_error_t
usbd_req_re_enumerate(struct usb_device *udev, struct mtx *mtx)
{
struct usb_device *parent_hub;
usb_error_t err;
uint8_t old_addr;
uint8_t do_retry = 1;
if (udev->flags.usb_mode != USB_MODE_HOST) {
return (USB_ERR_INVAL);
}
old_addr = udev->address;
parent_hub = udev->parent_hub;
if (parent_hub == NULL) {
return (USB_ERR_INVAL);
}
retry:
#if USB_HAVE_TT_SUPPORT
/*
* Try to reset the High Speed parent HUB of a LOW- or FULL-
* speed device, if any.
*/
if (udev->parent_hs_hub != NULL &&
udev->speed != USB_SPEED_HIGH) {
DPRINTF("Trying to reset parent High Speed TT.\n");
if (udev->parent_hs_hub == parent_hub &&
(uhub_count_active_host_ports(parent_hub, USB_SPEED_LOW) +
uhub_count_active_host_ports(parent_hub, USB_SPEED_FULL)) == 1) {
/* we can reset the whole TT */
err = usbd_req_reset_tt(parent_hub, NULL,
udev->hs_port_no);
} else {
/* only reset a particular device and endpoint */
err = usbd_req_clear_tt_buffer(udev->parent_hs_hub, NULL,
udev->hs_port_no, old_addr, UE_CONTROL, 0);
}
if (err) {
DPRINTF("Resetting parent High "
"Speed TT failed (%s).\n",
usbd_errstr(err));
}
}
#endif
/* Try to warm reset first */
if (parent_hub->speed == USB_SPEED_SUPER)
usbd_req_warm_reset_port(parent_hub, mtx, udev->port_no);
/* Try to reset the parent HUB port. */
err = usbd_req_reset_port(parent_hub, mtx, udev->port_no);
if (err) {
DPRINTFN(0, "addr=%d, port reset failed, %s\n",
old_addr, usbd_errstr(err));
goto done;
}
/*
* After that the port has been reset our device should be at
* address zero:
*/
udev->address = USB_START_ADDR;
/* reset "bMaxPacketSize" */
udev->ddesc.bMaxPacketSize = USB_MAX_IPACKET;
/* reset USB state */
usb_set_device_state(udev, USB_STATE_POWERED);
/*
* Restore device address:
*/
err = usbd_req_set_address(udev, mtx, old_addr);
if (err) {
/* XXX ignore any errors! */
DPRINTFN(0, "addr=%d, set address failed! (%s, ignored)\n",
old_addr, usbd_errstr(err));
}
/*
* Restore device address, if the controller driver did not
* set a new one:
*/
if (udev->address == USB_START_ADDR)
udev->address = old_addr;
/* setup the device descriptor and the initial "wMaxPacketSize" */
err = usbd_setup_device_desc(udev, mtx);
done:
if (err && do_retry) {
/* give the USB firmware some time to load */
usb_pause_mtx(mtx, hz / 2);
/* no more retries after this retry */
do_retry = 0;
/* try again */
goto retry;
}
/* restore address */
if (udev->address == USB_START_ADDR)
udev->address = old_addr;
/* update state, if successful */
if (err == 0)
usb_set_device_state(udev, USB_STATE_ADDRESSED);
return (err);
}
/*------------------------------------------------------------------------*
* usbd_req_clear_device_feature
*
* Returns:
* 0: Success
* Else: Failure
*------------------------------------------------------------------------*/
usb_error_t
usbd_req_clear_device_feature(struct usb_device *udev, struct mtx *mtx,
uint16_t sel)
{
struct usb_device_request req;
req.bmRequestType = UT_WRITE_DEVICE;
req.bRequest = UR_CLEAR_FEATURE;
USETW(req.wValue, sel);
USETW(req.wIndex, 0);
USETW(req.wLength, 0);
return (usbd_do_request(udev, mtx, &req, 0));
}
/*------------------------------------------------------------------------*
* usbd_req_set_device_feature
*
* Returns:
* 0: Success
* Else: Failure
*------------------------------------------------------------------------*/
usb_error_t
usbd_req_set_device_feature(struct usb_device *udev, struct mtx *mtx,
uint16_t sel)
{
struct usb_device_request req;
req.bmRequestType = UT_WRITE_DEVICE;
req.bRequest = UR_SET_FEATURE;
USETW(req.wValue, sel);
USETW(req.wIndex, 0);
USETW(req.wLength, 0);
return (usbd_do_request(udev, mtx, &req, 0));
}
/*------------------------------------------------------------------------*
* usbd_req_reset_tt
*
* Returns:
* 0: Success
* Else: Failure
*------------------------------------------------------------------------*/
usb_error_t
usbd_req_reset_tt(struct usb_device *udev, struct mtx *mtx,
uint8_t port)
{
struct usb_device_request req;
/* For single TT HUBs the port should be 1 */
if (udev->ddesc.bDeviceClass == UDCLASS_HUB &&
udev->ddesc.bDeviceProtocol == UDPROTO_HSHUBSTT)
port = 1;
req.bmRequestType = UT_WRITE_CLASS_OTHER;
req.bRequest = UR_RESET_TT;
USETW(req.wValue, 0);
req.wIndex[0] = port;
req.wIndex[1] = 0;
USETW(req.wLength, 0);
return (usbd_do_request(udev, mtx, &req, 0));
}
/*------------------------------------------------------------------------*
* usbd_req_clear_tt_buffer
*
* For single TT HUBs the port should be 1.
*
* Returns:
* 0: Success
* Else: Failure
*------------------------------------------------------------------------*/
usb_error_t
usbd_req_clear_tt_buffer(struct usb_device *udev, struct mtx *mtx,
uint8_t port, uint8_t addr, uint8_t type, uint8_t endpoint)
{
struct usb_device_request req;
uint16_t wValue;
/* For single TT HUBs the port should be 1 */
if (udev->ddesc.bDeviceClass == UDCLASS_HUB &&
udev->ddesc.bDeviceProtocol == UDPROTO_HSHUBSTT)
port = 1;
wValue = (endpoint & 0xF) | ((addr & 0x7F) << 4) |
((endpoint & 0x80) << 8) | ((type & 3) << 12);
req.bmRequestType = UT_WRITE_CLASS_OTHER;
req.bRequest = UR_CLEAR_TT_BUFFER;
USETW(req.wValue, wValue);
req.wIndex[0] = port;
req.wIndex[1] = 0;
USETW(req.wLength, 0);
return (usbd_do_request(udev, mtx, &req, 0));
}
/*------------------------------------------------------------------------*
* usbd_req_set_port_link_state
*
* USB 3.0 specific request
*
* Returns:
* 0: Success
* Else: Failure
*------------------------------------------------------------------------*/
usb_error_t
usbd_req_set_port_link_state(struct usb_device *udev, struct mtx *mtx,
uint8_t port, uint8_t link_state)
{
struct usb_device_request req;
req.bmRequestType = UT_WRITE_CLASS_OTHER;
req.bRequest = UR_SET_FEATURE;
USETW(req.wValue, UHF_PORT_LINK_STATE);
req.wIndex[0] = port;
req.wIndex[1] = link_state;
USETW(req.wLength, 0);
return (usbd_do_request(udev, mtx, &req, 0));
}
/*------------------------------------------------------------------------*
* usbd_req_set_lpm_info
*
* USB 2.0 specific request for Link Power Management.
*
* Returns:
* 0: Success
* USB_ERR_PENDING_REQUESTS: NYET
* USB_ERR_TIMEOUT: TIMEOUT
* USB_ERR_STALL: STALL
* Else: Failure
*------------------------------------------------------------------------*/
usb_error_t
usbd_req_set_lpm_info(struct usb_device *udev, struct mtx *mtx,
uint8_t port, uint8_t besl, uint8_t addr, uint8_t rwe)
{
struct usb_device_request req;
usb_error_t err;
uint8_t buf[1];
req.bmRequestType = UT_WRITE_CLASS_OTHER;
req.bRequest = UR_SET_AND_TEST;
USETW(req.wValue, UHF_PORT_L1);
req.wIndex[0] = (port & 0xF) | ((besl & 0xF) << 4);
req.wIndex[1] = (addr & 0x7F) | (rwe ? 0x80 : 0x00);
USETW(req.wLength, sizeof(buf));
/* set default value in case of short transfer */
buf[0] = 0x00;
err = usbd_do_request(udev, mtx, &req, buf);
if (err)
return (err);
switch (buf[0]) {
case 0x00: /* SUCCESS */
break;
case 0x10: /* NYET */
err = USB_ERR_PENDING_REQUESTS;
break;
case 0x11: /* TIMEOUT */
err = USB_ERR_TIMEOUT;
break;
case 0x30: /* STALL */
err = USB_ERR_STALLED;
break;
default: /* reserved */
err = USB_ERR_IOERROR;
break;
}
return (err);
}
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