freebsd-dev/sys/dev/usb/usb_util.c
2009-05-29 18:46:57 +00:00

334 lines
8.8 KiB
C

/* $FreeBSD$ */
/*-
* Copyright (c) 2008 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.
*/
#include <dev/usb/usb_mfunc.h>
#include <dev/usb/usb_error.h>
#include <dev/usb/usb.h>
#include <dev/usb/usb_core.h>
#include <dev/usb/usb_util.h>
#include <dev/usb/usb_process.h>
#include <dev/usb/usb_device.h>
#include <dev/usb/usb_request.h>
#include <dev/usb/usb_busdma.h>
#include <dev/usb/usb_controller.h>
#include <dev/usb/usb_bus.h>
/* function prototypes */
#if (USB_HAVE_CONDVAR == 0)
static int usb2_msleep(void *chan, struct mtx *mtx, int priority, const char *wmesg, int timo);
#endif
/*------------------------------------------------------------------------*
* device_delete_all_children - delete all children of a device
*------------------------------------------------------------------------*/
#ifndef device_delete_all_children
int
device_delete_all_children(device_t dev)
{
device_t *devlist;
int devcount;
int error;
error = device_get_children(dev, &devlist, &devcount);
if (error == 0) {
while (devcount-- > 0) {
error = device_delete_child(dev, devlist[devcount]);
if (error) {
break;
}
}
free(devlist, M_TEMP);
}
return (error);
}
#endif
/*------------------------------------------------------------------------*
* device_set_usb2_desc
*
* This function can be called at probe or attach to set the USB
* device supplied textual description for the given device.
*------------------------------------------------------------------------*/
void
device_set_usb2_desc(device_t dev)
{
struct usb_attach_arg *uaa;
struct usb_device *udev;
struct usb_interface *iface;
char *temp_p;
usb_error_t err;
if (dev == NULL) {
/* should not happen */
return;
}
uaa = device_get_ivars(dev);
if (uaa == NULL) {
/* can happen if called at the wrong time */
return;
}
udev = uaa->device;
iface = uaa->iface;
if ((iface == NULL) ||
(iface->idesc == NULL) ||
(iface->idesc->iInterface == 0)) {
err = USB_ERR_INVAL;
} else {
err = 0;
}
temp_p = (char *)udev->bus->scratch[0].data;
if (!err) {
/* try to get the interface string ! */
err = usb2_req_get_string_any
(udev, NULL, temp_p,
sizeof(udev->bus->scratch), iface->idesc->iInterface);
}
if (err) {
/* use default description */
usb2_devinfo(udev, temp_p,
sizeof(udev->bus->scratch));
}
device_set_desc_copy(dev, temp_p);
device_printf(dev, "<%s> on %s\n", temp_p,
device_get_nameunit(udev->bus->bdev));
}
/*------------------------------------------------------------------------*
* usb2_pause_mtx - factored out code
*
* This function will delay the code by the passed number of system
* ticks. The passed mutex "mtx" will be dropped while waiting, if
* "mtx" is not NULL.
*------------------------------------------------------------------------*/
void
usb2_pause_mtx(struct mtx *mtx, int _ticks)
{
if (mtx != NULL)
mtx_unlock(mtx);
if (cold) {
/* convert to milliseconds */
_ticks = (_ticks * 1000) / hz;
/* convert to microseconds, rounded up */
_ticks = (_ticks + 1) * 1000;
DELAY(_ticks);
} else {
/*
* Add one to the number of ticks so that we don't return
* too early!
*/
_ticks++;
if (pause("USBWAIT", _ticks)) {
/* ignore */
}
}
if (mtx != NULL)
mtx_lock(mtx);
}
/*------------------------------------------------------------------------*
* usb2_printBCD
*
* This function will print the version number "bcd" to the string
* pointed to by "p" having a maximum length of "p_len" bytes
* including the terminating zero.
*------------------------------------------------------------------------*/
void
usb2_printBCD(char *p, uint16_t p_len, uint16_t bcd)
{
if (snprintf(p, p_len, "%x.%02x", bcd >> 8, bcd & 0xff)) {
/* ignore any errors */
}
}
/*------------------------------------------------------------------------*
* usb2_trim_spaces
*
* This function removes spaces at the beginning and the end of the string
* pointed to by the "p" argument.
*------------------------------------------------------------------------*/
void
usb2_trim_spaces(char *p)
{
char *q;
char *e;
if (p == NULL)
return;
q = e = p;
while (*q == ' ') /* skip leading spaces */
q++;
while ((*p = *q++)) /* copy string */
if (*p++ != ' ') /* remember last non-space */
e = p;
*e = 0; /* kill trailing spaces */
}
/*------------------------------------------------------------------------*
* usb2_make_str_desc - convert an ASCII string into a UNICODE string
*------------------------------------------------------------------------*/
uint8_t
usb2_make_str_desc(void *ptr, uint16_t max_len, const char *s)
{
struct usb_string_descriptor *p = ptr;
uint8_t totlen;
int j;
if (max_len < 2) {
/* invalid length */
return (0);
}
max_len = ((max_len / 2) - 1);
j = strlen(s);
if (j < 0) {
j = 0;
}
if (j > 126) {
j = 126;
}
if (max_len > j) {
max_len = j;
}
totlen = (max_len + 1) * 2;
p->bLength = totlen;
p->bDescriptorType = UDESC_STRING;
while (max_len--) {
USETW2(p->bString[max_len], 0, s[max_len]);
}
return (totlen);
}
#if (USB_HAVE_CONDVAR == 0)
/*------------------------------------------------------------------------*
* usb2_cv_init - wrapper function
*------------------------------------------------------------------------*/
void
usb2_cv_init(struct cv *cv, const char *desc)
{
cv_init(cv, desc);
}
/*------------------------------------------------------------------------*
* usb2_cv_destroy - wrapper function
*------------------------------------------------------------------------*/
void
usb2_cv_destroy(struct cv *cv)
{
cv_destroy(cv);
}
/*------------------------------------------------------------------------*
* usb2_cv_wait - wrapper function
*------------------------------------------------------------------------*/
void
usb2_cv_wait(struct cv *cv, struct mtx *mtx)
{
int err;
err = usb2_msleep(cv, mtx, 0, cv_wmesg(cv), 0);
}
/*------------------------------------------------------------------------*
* usb2_cv_wait_sig - wrapper function
*------------------------------------------------------------------------*/
int
usb2_cv_wait_sig(struct cv *cv, struct mtx *mtx)
{
int err;
err = usb2_msleep(cv, mtx, PCATCH, cv_wmesg(cv), 0);
return (err);
}
/*------------------------------------------------------------------------*
* usb2_cv_timedwait - wrapper function
*------------------------------------------------------------------------*/
int
usb2_cv_timedwait(struct cv *cv, struct mtx *mtx, int timo)
{
int err;
if (timo == 0)
timo = 1; /* zero means no timeout */
err = usb2_msleep(cv, mtx, 0, cv_wmesg(cv), timo);
return (err);
}
/*------------------------------------------------------------------------*
* usb2_cv_signal - wrapper function
*------------------------------------------------------------------------*/
void
usb2_cv_signal(struct cv *cv)
{
wakeup_one(cv);
}
/*------------------------------------------------------------------------*
* usb2_cv_broadcast - wrapper function
*------------------------------------------------------------------------*/
void
usb2_cv_broadcast(struct cv *cv)
{
wakeup(cv);
}
/*------------------------------------------------------------------------*
* usb2_msleep - wrapper function
*------------------------------------------------------------------------*/
static int
usb2_msleep(void *chan, struct mtx *mtx, int priority, const char *wmesg,
int timo)
{
int err;
if (mtx == &Giant) {
err = tsleep(chan, priority, wmesg, timo);
} else {
#ifdef mtx_sleep
err = mtx_sleep(chan, mtx, priority, wmesg, timo);
#else
err = msleep(chan, mtx, priority, wmesg, timo);
#endif
}
return (err);
}
#endif