518 lines
11 KiB
C
518 lines
11 KiB
C
/* $NetBSD: hidsubr.c,v 1.2 1998/07/13 20:44:03 augustss Exp $ */
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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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* Author: Lennart Augustsson
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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 <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <sys/types.h>
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#include <unistd.h>
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#include <err.h>
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#include <ctype.h>
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#include <dev/usb/usb.h>
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#include <dev/usb/usbhid.h>
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#include "hidsubr.h"
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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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u_int32_t usages[MAXUSAGE];
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int nusage;
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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 int min(int x, int y) { return x < y ? x : y; }
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static void
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hid_clear_local(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(u_char *d, int len, int kindset)
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{
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struct hid_data *s;
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s = malloc(sizeof *s);
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memset(s, 0, sizeof *s);
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s->start = s->p = d;
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s->end = 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(struct hid_data *s)
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{
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while (s->cur.next) {
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struct hid_item *hi = s->cur.next->next;
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free(s->cur.next);
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s->cur.next = hi;
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}
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free(s);
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}
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int
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hid_get_item(struct hid_data *s, struct hid_item *h)
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{
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struct hid_item *c = &s->cur;
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int bTag = 0, bType = 0, bSize;
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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) {
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if (s->multi < s->multimax) {
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c->usage = s->usages[min(s->multi, s->nusage-1)];
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s->multi++;
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*h = *c;
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c->pos += c->report_size;
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h->next = 0;
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return (1);
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} else {
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c->report_count = s->multimax;
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s->multimax = 0;
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s->nusage = 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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} 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->report_count;
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s->multi = 0;
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c->report_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->nusage] = i;
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if (s->nusage < MAXUSAGE-1)
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s->nusage++;
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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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if (s->minset)
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c->usage = c->usage_minimum;
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*h = *c;
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h->next = 0;
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c->pos += c->report_size * c->report_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->nusage = 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->nusage = 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->report_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->report_count = dval;
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break;
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case 10: /* Push */
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hi = malloc(sizeof *hi);
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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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s->cur = *hi;
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free(hi);
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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->nusage < MAXUSAGE)
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s->usages[s->nusage++] = 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(u_char *buf, int len, enum hid_kind k)
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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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memset(&h, 0, sizeof h);
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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 = 8;
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hid_end_parse(d);
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size = h.pos + id;
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return ((size + 7) / 8);
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}
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struct usage_in_page {
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char *name;
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int usage;
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};
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struct usage_page {
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char *name;
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int usage;
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struct usage_in_page *page_contents;
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int pagesize, pagesizemax;
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} *pages;
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int npages, npagesmax;
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void
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dump_hid_table(void)
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{
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int i, j;
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for (i = 0; i < npages; i++) {
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printf("%d\t%s\n", pages[i].usage, pages[i].name);
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for (j = 0; j < pages[i].pagesize; j++) {
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printf("\t%d\t%s\n", pages[i].page_contents[j].usage,
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pages[i].page_contents[j].name);
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}
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}
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}
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void
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init_hid(char *hidname)
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{
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FILE *f;
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char line[100], name[100], *p, *n;
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int no;
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int lineno;
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struct usage_page *curpage = 0;
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f = fopen(hidname, "r");
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if (f == NULL)
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err(1, "%s", hidname);
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for (lineno = 1; ; lineno++) {
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if (fgets(line, sizeof line, f) == NULL)
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break;
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if (line[0] == '#')
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continue;
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for (p = line; *p && isspace(*p); p++)
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;
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if (!*p)
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continue;
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if (sscanf(line, " * %[^\n]", name) == 1)
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no = -1;
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else if (sscanf(line, " 0x%x %[^\n]", &no, name) != 2 &&
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sscanf(line, " %d %[^\n]", &no, name) != 2)
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errx(1, "file %s, line %d, syntax error\n",
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hidname, lineno);
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for (p = name; *p; p++)
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if (isspace(*p) || *p == '.')
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*p = '_';
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n = strdup(name);
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if (!n)
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err(1, "strdup");
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if (isspace(line[0])) {
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if (!curpage)
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errx(1, "file %s, line %d, syntax error\n",
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hidname, lineno);
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if (curpage->pagesize >= curpage->pagesizemax) {
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curpage->pagesizemax += 10;
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curpage->page_contents =
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realloc(curpage->page_contents,
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curpage->pagesizemax *
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sizeof (struct usage_in_page));
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if (!curpage->page_contents)
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err(1, "realloc");
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}
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curpage->page_contents[curpage->pagesize].name = n;
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curpage->page_contents[curpage->pagesize].usage = no;
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curpage->pagesize++;
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} else {
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if (npages >= npagesmax) {
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if (pages == 0) {
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npagesmax = 5;
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pages = malloc(npagesmax *
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sizeof (struct usage_page));
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} else {
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npagesmax += 5;
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pages = realloc(pages,
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npagesmax *
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sizeof (struct usage_page));
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}
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if (!pages)
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err(1, "alloc");
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}
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curpage = &pages[npages++];
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curpage->name = n;
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curpage->usage = no;
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curpage->pagesize = 0;
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curpage->pagesizemax = 10;
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curpage->page_contents =
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malloc(curpage->pagesizemax *
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sizeof (struct usage_in_page));
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if (!curpage->page_contents)
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err(1, "malloc");
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}
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}
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fclose(f);
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/*dump_hid_table();*/
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}
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char *
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usage_page(int i)
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{
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static char b[10];
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int k;
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if (!pages)
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errx(1, "no hid table\n");
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for (k = 0; k < npages; k++)
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if (pages[k].usage == i)
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return pages[k].name;
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sprintf(b, "x%x", i);
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return b;
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}
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char *
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usage_in_page(unsigned int u)
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{
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int page = HID_PAGE(u);
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int i = HID_USAGE(u);
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static char b[100];
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int j, k, us;
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for (k = 0; k < npages; k++)
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if (pages[k].usage == page)
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break;
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if (k >= npages)
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goto bad;
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for (j = 0; j < pages[k].pagesize; j++) {
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us = pages[k].page_contents[j].usage;
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if (us == -1) {
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sprintf(b, pages[k].page_contents[j].name, i);
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return b;
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}
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if (us == i)
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return pages[k].page_contents[j].name;
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}
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bad:
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sprintf(b, "x%x", i);
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return b;
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}
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