474 lines
9.9 KiB
C
474 lines
9.9 KiB
C
/* $NetBSD: hid.c,v 1.15 2000/04/27 15:26:46 augustss Exp $ */
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/* $FreeBSD$ */
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/*
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* Copyright (c) 1998 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Lennart Augustsson (lennart@augustsson.net) at
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* Carlstedt Research & Technology.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the NetBSD
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* Foundation, Inc. and its contributors.
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* 4. Neither the name of The NetBSD Foundation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/param.h>
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#include <sys/systm.h>
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#if defined(__NetBSD__)
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#include <sys/kernel.h>
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#endif
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#include <sys/malloc.h>
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#include <dev/usb/usb.h>
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#include <dev/usb/usbhid.h>
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#include <dev/usb/hid.h>
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#ifdef UHID_DEBUG
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#define DPRINTF(x) if (usbdebug) logprintf x
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#define DPRINTFN(n,x) if (usbdebug>(n)) logprintf x
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extern int usbdebug;
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#else
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#define DPRINTF(x)
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#define DPRINTFN(n,x)
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#endif
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Static void hid_clear_local(struct hid_item *);
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#define MAXUSAGE 100
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struct hid_data {
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u_char *start;
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u_char *end;
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u_char *p;
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struct hid_item cur;
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int32_t usages[MAXUSAGE];
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int nu;
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int minset;
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int multi;
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int multimax;
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int kindset;
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};
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Static void
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hid_clear_local(c)
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struct hid_item *c;
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{
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c->usage = 0;
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c->usage_minimum = 0;
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c->usage_maximum = 0;
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c->designator_index = 0;
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c->designator_minimum = 0;
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c->designator_maximum = 0;
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c->string_index = 0;
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c->string_minimum = 0;
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c->string_maximum = 0;
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c->set_delimiter = 0;
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}
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struct hid_data *
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hid_start_parse(d, len, kindset)
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void *d;
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int len;
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int kindset;
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{
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struct hid_data *s;
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s = malloc(sizeof *s, M_TEMP, M_WAITOK);
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memset(s, 0, sizeof *s);
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s->start = s->p = d;
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s->end = (char *)d + len;
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s->kindset = kindset;
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return (s);
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}
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void
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hid_end_parse(s)
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struct hid_data *s;
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{
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while (s->cur.next != NULL) {
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struct hid_item *hi = s->cur.next->next;
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free(s->cur.next, M_TEMP);
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s->cur.next = hi;
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}
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free(s, M_TEMP);
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}
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int
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hid_get_item(s, h)
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struct hid_data *s;
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struct hid_item *h;
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{
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struct hid_item *c = &s->cur;
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unsigned int bTag, bType, bSize;
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u_int32_t oldpos;
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u_char *data;
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int32_t dval;
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u_char *p;
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struct hid_item *hi;
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int i;
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top:
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if (s->multimax != 0) {
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if (s->multi < s->multimax) {
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c->usage = s->usages[min(s->multi, s->nu-1)];
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s->multi++;
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*h = *c;
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c->loc.pos += c->loc.size;
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h->next = 0;
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return (1);
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} else {
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c->loc.count = s->multimax;
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s->multimax = 0;
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s->nu = 0;
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hid_clear_local(c);
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}
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}
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for (;;) {
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p = s->p;
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if (p >= s->end)
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return (0);
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bSize = *p++;
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if (bSize == 0xfe) {
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/* long item */
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bSize = *p++;
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bSize |= *p++ << 8;
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bTag = *p++;
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data = p;
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p += bSize;
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bType = 0xff; /* XXX what should it be */
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} else {
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/* short item */
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bTag = bSize >> 4;
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bType = (bSize >> 2) & 3;
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bSize &= 3;
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if (bSize == 3) bSize = 4;
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data = p;
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p += bSize;
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}
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s->p = p;
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switch(bSize) {
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case 0:
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dval = 0;
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break;
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case 1:
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dval = (int8_t)*data++;
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break;
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case 2:
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dval = *data++;
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dval |= *data++ << 8;
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dval = (int16_t)dval;
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break;
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case 4:
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dval = *data++;
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dval |= *data++ << 8;
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dval |= *data++ << 16;
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dval |= *data++ << 24;
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break;
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default:
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printf("BAD LENGTH %d\n", bSize);
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continue;
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}
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switch (bType) {
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case 0: /* Main */
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switch (bTag) {
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case 8: /* Input */
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if (!(s->kindset & (1 << hid_input)))
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continue;
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c->kind = hid_input;
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c->flags = dval;
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ret:
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if (c->flags & HIO_VARIABLE) {
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s->multimax = c->loc.count;
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s->multi = 0;
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c->loc.count = 1;
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if (s->minset) {
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for (i = c->usage_minimum;
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i <= c->usage_maximum;
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i++) {
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s->usages[s->nu] = i;
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if (s->nu < MAXUSAGE-1)
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s->nu++;
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}
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s->minset = 0;
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}
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goto top;
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} else {
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*h = *c;
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h->next = 0;
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c->loc.pos +=
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c->loc.size * c->loc.count;
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hid_clear_local(c);
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s->minset = 0;
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return (1);
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}
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case 9: /* Output */
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if (!(s->kindset & (1 << hid_output)))
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continue;
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c->kind = hid_output;
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c->flags = dval;
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goto ret;
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case 10: /* Collection */
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c->kind = hid_collection;
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c->collection = dval;
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c->collevel++;
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*h = *c;
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hid_clear_local(c);
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s->nu = 0;
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return (1);
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case 11: /* Feature */
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if (!(s->kindset & (1 << hid_feature)))
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continue;
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c->kind = hid_feature;
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c->flags = dval;
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goto ret;
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case 12: /* End collection */
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c->kind = hid_endcollection;
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c->collevel--;
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*h = *c;
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hid_clear_local(c);
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s->nu = 0;
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return (1);
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default:
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printf("Main bTag=%d\n", bTag);
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break;
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}
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break;
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case 1: /* Global */
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switch (bTag) {
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case 0:
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c->_usage_page = dval << 16;
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break;
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case 1:
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c->logical_minimum = dval;
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break;
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case 2:
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c->logical_maximum = dval;
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break;
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case 3:
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c->physical_maximum = dval;
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break;
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case 4:
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c->physical_maximum = dval;
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break;
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case 5:
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c->unit_exponent = dval;
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break;
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case 6:
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c->unit = dval;
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break;
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case 7:
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c->loc.size = dval;
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break;
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case 8:
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c->report_ID = dval;
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break;
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case 9:
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c->loc.count = dval;
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break;
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case 10: /* Push */
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hi = malloc(sizeof *hi, M_TEMP, M_WAITOK);
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*hi = s->cur;
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c->next = hi;
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break;
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case 11: /* Pop */
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hi = c->next;
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oldpos = c->loc.pos;
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s->cur = *hi;
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c->loc.pos = oldpos;
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free(hi, M_TEMP);
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break;
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default:
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printf("Global bTag=%d\n", bTag);
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break;
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}
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break;
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case 2: /* Local */
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switch (bTag) {
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case 0:
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if (bSize == 1)
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dval = c->_usage_page | (dval&0xff);
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else if (bSize == 2)
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dval = c->_usage_page | (dval&0xffff);
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c->usage = dval;
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if (s->nu < MAXUSAGE)
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s->usages[s->nu++] = dval;
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/* else XXX */
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break;
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case 1:
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s->minset = 1;
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if (bSize == 1)
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dval = c->_usage_page | (dval&0xff);
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else if (bSize == 2)
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dval = c->_usage_page | (dval&0xffff);
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c->usage_minimum = dval;
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break;
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case 2:
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if (bSize == 1)
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dval = c->_usage_page | (dval&0xff);
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else if (bSize == 2)
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dval = c->_usage_page | (dval&0xffff);
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c->usage_maximum = dval;
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break;
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case 3:
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c->designator_index = dval;
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break;
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case 4:
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c->designator_minimum = dval;
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break;
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case 5:
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c->designator_maximum = dval;
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break;
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case 7:
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c->string_index = dval;
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break;
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case 8:
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c->string_minimum = dval;
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break;
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case 9:
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c->string_maximum = dval;
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break;
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case 10:
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c->set_delimiter = dval;
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break;
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default:
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printf("Local bTag=%d\n", bTag);
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break;
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}
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break;
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default:
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printf("default bType=%d\n", bType);
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break;
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}
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}
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}
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int
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hid_report_size(buf, len, k, idp)
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void *buf;
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int len;
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enum hid_kind k;
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u_int8_t *idp;
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{
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struct hid_data *d;
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struct hid_item h;
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int size, id;
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id = 0;
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for (d = hid_start_parse(buf, len, 1<<k); hid_get_item(d, &h); )
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if (h.report_ID != 0)
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id = h.report_ID;
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hid_end_parse(d);
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size = h.loc.pos;
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if (id != 0) {
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size += 8;
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*idp = id; /* XXX wrong */
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} else
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*idp = 0;
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return ((size + 7) / 8);
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}
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int
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hid_locate(desc, size, u, k, loc, flags)
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void *desc;
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int size;
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u_int32_t u;
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enum hid_kind k;
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struct hid_location *loc;
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u_int32_t *flags;
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{
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struct hid_data *d;
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struct hid_item h;
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for (d = hid_start_parse(desc, size, 1<<k); hid_get_item(d, &h); ) {
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if (h.kind == k && !(h.flags & HIO_CONST) && h.usage == u) {
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if (loc != NULL)
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*loc = h.loc;
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if (flags != NULL)
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*flags = h.flags;
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hid_end_parse(d);
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return (1);
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}
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}
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hid_end_parse(d);
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loc->size = 0;
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return (0);
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}
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u_long
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hid_get_data(buf, loc)
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u_char *buf;
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struct hid_location *loc;
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{
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u_int hpos = loc->pos;
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u_int hsize = loc->size;
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u_int32_t data;
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int i, s;
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DPRINTFN(10, ("hid_get_data: loc %d/%d\n", hpos, hsize));
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if (hsize == 0)
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return (0);
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data = 0;
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s = hpos / 8;
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for (i = hpos; i < hpos+hsize; i += 8)
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data |= buf[i / 8] << ((i / 8 - s) * 8);
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data >>= hpos % 8;
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data &= (1 << hsize) - 1;
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hsize = 32 - hsize;
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/* Sign extend */
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data = ((int32_t)data << hsize) >> hsize;
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DPRINTFN(10,("hid_get_data: loc %d/%d = %lu\n",
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loc->pos, loc->size, (long)data));
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return (data);
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}
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int
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hid_is_collection(desc, size, usage)
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void *desc;
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int size;
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u_int32_t usage;
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{
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struct hid_data *hd;
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struct hid_item hi;
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int err;
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hd = hid_start_parse(desc, size, hid_input);
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if (hd == NULL)
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return (0);
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err = hid_get_item(hd, &hi) &&
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hi.kind == hid_collection &&
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hi.usage == usage;
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hid_end_parse(hd);
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return (err);
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}
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