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/* $NetBSD: descr.c,v 1.9 2000/09/24 02:13:24 augustss Exp $ */
/*
* Copyright (c) 1999 Lennart Augustsson <augustss@netbsd.org>
* 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 <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/types.h>
#include <assert.h>
#include <errno.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <sys/time.h>
#include <sys/ioctl.h>
#include <dev/usb/usb_ioctl.h>
#include "usbhid.h"
#include "usbvar.h"
int
hid_set_immed(int fd, int enable)
{
int ret;
ret = ioctl(fd, USB_SET_IMMED, &enable);
#ifdef HID_COMPAT7
if (ret < 0)
ret = hid_set_immed_compat7(fd, enable);
#endif
return (ret);
}
int
hid_get_report_id(int fd)
{
report_desc_t rep;
hid_data_t d;
hid_item_t h;
int kindset;
int temp = -1;
int ret;
if ((rep = hid_get_report_desc(fd)) == NULL)
goto use_ioctl;
kindset = 1 << hid_input | 1 << hid_output | 1 << hid_feature;
for (d = hid_start_parse(rep, kindset, 0); hid_get_item(d, &h); ) {
/* Return the first report ID we met. */
if (h.report_ID != 0) {
temp = h.report_ID;
break;
}
}
hid_end_parse(d);
hid_dispose_report_desc(rep);
if (temp > 0)
return (temp);
use_ioctl:
ret = ioctl(fd, USB_GET_REPORT_ID, &temp);
#ifdef HID_COMPAT7
if (ret < 0)
ret = hid_get_report_id_compat7(fd);
else
#endif
ret = temp;
return (ret);
}
report_desc_t
hid_get_report_desc(int fd)
{
struct usb_gen_descriptor ugd;
report_desc_t rep;
void *data;
memset(&ugd, 0, sizeof(ugd));
/* get actual length first */
ugd.ugd_data = hid_pass_ptr(NULL);
ugd.ugd_maxlen = 65535;
if (ioctl(fd, USB_GET_REPORT_DESC, &ugd) < 0) {
#ifdef HID_COMPAT7
/* could not read descriptor */
/* try FreeBSD 7 compat code */
return (hid_get_report_desc_compat7(fd));
#else
return (NULL);
#endif
}
/*
* NOTE: The kernel will return a failure if
* "ugd_actlen" is zero.
*/
data = malloc(ugd.ugd_actlen);
if (data == NULL)
return (NULL);
/* fetch actual descriptor */
ugd.ugd_data = hid_pass_ptr(data);
ugd.ugd_maxlen = ugd.ugd_actlen;
if (ioctl(fd, USB_GET_REPORT_DESC, &ugd) < 0) {
/* could not read descriptor */
free(data);
return (NULL);
}
/* sanity check */
if (ugd.ugd_actlen < 1) {
/* invalid report descriptor */
free(data);
return (NULL);
}
/* check END_COLLECTION */
if (((unsigned char *)data)[ugd.ugd_actlen -1] != 0xC0) {
/* invalid end byte */
free(data);
return (NULL);
}
rep = hid_use_report_desc(data, ugd.ugd_actlen);
free(data);
return (rep);
}
report_desc_t
hid_use_report_desc(unsigned char *data, unsigned int size)
{
report_desc_t r;
r = malloc(sizeof(*r) + size);
if (r == 0) {
errno = ENOMEM;
return (NULL);
}
r->size = size;
memcpy(r->data, data, size);
return (r);
}
void
hid_dispose_report_desc(report_desc_t r)
{
free(r);
}
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