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NetBSD/usr.bin/usbhidctl/hidsubr.c

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/* $NetBSD: hidsubr.c,v 1.2 1998/07/13 20:44:03 augustss Exp $ */
/*
* Copyright (c) 1998 The NetBSD Foundation, Inc.
* All rights reserved.
*
* Author: Lennart Augustsson
*
* 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.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the NetBSD
* Foundation, Inc. and its contributors.
* 4. Neither the name of The NetBSD Foundation nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. 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 FOUNDATION 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 <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/types.h>
#include <unistd.h>
#include <err.h>
#include <ctype.h>
#include <dev/usb/usb.h>
#include <dev/usb/usbhid.h>
#include "hidsubr.h"
#define MAXUSAGE 100
struct hid_data {
u_char *start;
u_char *end;
u_char *p;
struct hid_item cur;
u_int32_t usages[MAXUSAGE];
int nusage;
int minset;
int multi;
int multimax;
int kindset;
};
static int min(int x, int y) { return x < y ? x : y; }
static void
hid_clear_local(struct hid_item *c)
{
c->usage = 0;
c->usage_minimum = 0;
c->usage_maximum = 0;
c->designator_index = 0;
c->designator_minimum = 0;
c->designator_maximum = 0;
c->string_index = 0;
c->string_minimum = 0;
c->string_maximum = 0;
c->set_delimiter = 0;
}
struct hid_data *
hid_start_parse(u_char *d, int len, int kindset)
{
struct hid_data *s;
s = malloc(sizeof *s);
memset(s, 0, sizeof *s);
s->start = s->p = d;
s->end = d + len;
s->kindset = kindset;
return (s);
}
void
hid_end_parse(struct hid_data *s)
{
while (s->cur.next) {
struct hid_item *hi = s->cur.next->next;
free(s->cur.next);
s->cur.next = hi;
}
free(s);
}
int
hid_get_item(struct hid_data *s, struct hid_item *h)
{
struct hid_item *c = &s->cur;
int bTag = 0, bType = 0, bSize;
u_char *data;
int32_t dval;
u_char *p;
struct hid_item *hi;
int i;
top:
if (s->multimax) {
if (s->multi < s->multimax) {
c->usage = s->usages[min(s->multi, s->nusage-1)];
s->multi++;
*h = *c;
c->pos += c->report_size;
h->next = 0;
return (1);
} else {
c->report_count = s->multimax;
s->multimax = 0;
s->nusage = 0;
hid_clear_local(c);
}
}
for (;;) {
p = s->p;
if (p >= s->end)
return (0);
bSize = *p++;
if (bSize == 0xfe) {
/* long item */
bSize = *p++;
bSize |= *p++ << 8;
bTag = *p++;
data = p;
p += bSize;
} else {
/* short item */
bTag = bSize >> 4;
bType = (bSize >> 2) & 3;
bSize &= 3;
if (bSize == 3) bSize = 4;
data = p;
p += bSize;
}
s->p = p;
switch(bSize) {
case 0:
dval = 0;
break;
case 1:
dval = (int8_t)*data++;
break;
case 2:
dval = *data++;
dval |= *data++ << 8;
dval = (int16_t)dval;
break;
case 4:
dval = *data++;
dval |= *data++ << 8;
dval |= *data++ << 16;
dval |= *data++ << 24;
break;
default:
printf("BAD LENGTH %d\n", bSize);
continue;
}
switch (bType) {
case 0: /* Main */
switch (bTag) {
case 8: /* Input */
if (!(s->kindset & (1 << hid_input)))
continue;
c->kind = hid_input;
c->flags = dval;
ret:
if (c->flags & HIO_VARIABLE) {
s->multimax = c->report_count;
s->multi = 0;
c->report_count = 1;
if (s->minset) {
for (i = c->usage_minimum;
i <= c->usage_maximum;
i++) {
s->usages[s->nusage] = i;
if (s->nusage < MAXUSAGE-1)
s->nusage++;
}
s->minset = 0;
}
goto top;
} else {
if (s->minset)
c->usage = c->usage_minimum;
*h = *c;
h->next = 0;
c->pos += c->report_size * c->report_count;
hid_clear_local(c);
s->minset = 0;
return (1);
}
case 9: /* Output */
if (!(s->kindset & (1 << hid_output)))
continue;
c->kind = hid_output;
c->flags = dval;
goto ret;
case 10: /* Collection */
c->kind = hid_collection;
c->collection = dval;
c->collevel++;
*h = *c;
hid_clear_local(c);
s->nusage = 0;
return (1);
case 11: /* Feature */
if (!(s->kindset & (1 << hid_feature)))
continue;
c->kind = hid_feature;
c->flags = dval;
goto ret;
case 12: /* End collection */
c->kind = hid_endcollection;
c->collevel--;
*h = *c;
hid_clear_local(c);
s->nusage = 0;
return (1);
default:
printf("Main bTag=%d\n", bTag);
break;
}
break;
case 1: /* Global */
switch (bTag) {
case 0:
c->_usage_page = dval << 16;
break;
case 1:
c->logical_minimum = dval;
break;
case 2:
c->logical_maximum = dval;
break;
case 3:
c->physical_maximum = dval;
break;
case 4:
c->physical_maximum = dval;
break;
case 5:
c->unit_exponent = dval;
break;
case 6:
c->unit = dval;
break;
case 7:
c->report_size = dval;
break;
case 8:
c->report_ID = dval;
break;
case 9:
c->report_count = dval;
break;
case 10: /* Push */
hi = malloc(sizeof *hi);
*hi = s->cur;
c->next = hi;
break;
case 11: /* Pop */
hi = c->next;
s->cur = *hi;
free(hi);
break;
default:
printf("Global bTag=%d\n", bTag);
break;
}
break;
case 2: /* Local */
switch (bTag) {
case 0:
if (bSize == 1)
dval = c->_usage_page | (dval&0xff);
else if (bSize == 2)
dval = c->_usage_page | (dval&0xffff);
c->usage = dval;
if (s->nusage < MAXUSAGE)
s->usages[s->nusage++] = dval;
/* else XXX */
break;
case 1:
s->minset = 1;
if (bSize == 1)
dval = c->_usage_page | (dval&0xff);
else if (bSize == 2)
dval = c->_usage_page | (dval&0xffff);
c->usage_minimum = dval;
break;
case 2:
if (bSize == 1)
dval = c->_usage_page | (dval&0xff);
else if (bSize == 2)
dval = c->_usage_page | (dval&0xffff);
c->usage_maximum = dval;
break;
case 3:
c->designator_index = dval;
break;
case 4:
c->designator_minimum = dval;
break;
case 5:
c->designator_maximum = dval;
break;
case 7:
c->string_index = dval;
break;
case 8:
c->string_minimum = dval;
break;
case 9:
c->string_maximum = dval;
break;
case 10:
c->set_delimiter = dval;
break;
default:
printf("Local bTag=%d\n", bTag);
break;
}
break;
default:
printf("default bType=%d\n", bType);
break;
}
}
}
int
hid_report_size(u_char *buf, int len, enum hid_kind k)
{
struct hid_data *d;
struct hid_item h;
int size, id;
id = 0;
memset(&h, 0, sizeof h);
for (d = hid_start_parse(buf, len, 1<<k); hid_get_item(d, &h); )
if (h.report_ID != 0)
id = 8;
hid_end_parse(d);
size = h.pos + id;
return ((size + 7) / 8);
}
struct usage_in_page {
char *name;
int usage;
};
struct usage_page {
char *name;
int usage;
struct usage_in_page *page_contents;
int pagesize, pagesizemax;
} *pages;
int npages, npagesmax;
void
dump_hid_table(void)
{
int i, j;
for (i = 0; i < npages; i++) {
printf("%d\t%s\n", pages[i].usage, pages[i].name);
for (j = 0; j < pages[i].pagesize; j++) {
printf("\t%d\t%s\n", pages[i].page_contents[j].usage,
pages[i].page_contents[j].name);
}
}
}
void
init_hid(char *hidname)
{
FILE *f;
char line[100], name[100], *p, *n;
int no;
int lineno;
struct usage_page *curpage = 0;
f = fopen(hidname, "r");
if (f == NULL)
err(1, "%s", hidname);
for (lineno = 1; ; lineno++) {
if (fgets(line, sizeof line, f) == NULL)
break;
if (line[0] == '#')
continue;
for (p = line; *p && isspace(*p); p++)
;
if (!*p)
continue;
if (sscanf(line, " * %[^\n]", name) == 1)
no = -1;
else if (sscanf(line, " 0x%x %[^\n]", &no, name) != 2 &&
sscanf(line, " %d %[^\n]", &no, name) != 2)
errx(1, "file %s, line %d, syntax error\n",
hidname, lineno);
for (p = name; *p; p++)
if (isspace(*p) || *p == '.')
*p = '_';
n = strdup(name);
if (!n)
err(1, "strdup");
if (isspace(line[0])) {
if (!curpage)
errx(1, "file %s, line %d, syntax error\n",
hidname, lineno);
if (curpage->pagesize >= curpage->pagesizemax) {
curpage->pagesizemax += 10;
curpage->page_contents =
realloc(curpage->page_contents,
curpage->pagesizemax *
sizeof (struct usage_in_page));
if (!curpage->page_contents)
err(1, "realloc");
}
curpage->page_contents[curpage->pagesize].name = n;
curpage->page_contents[curpage->pagesize].usage = no;
curpage->pagesize++;
} else {
if (npages >= npagesmax) {
if (pages == 0) {
npagesmax = 5;
pages = malloc(npagesmax *
sizeof (struct usage_page));
} else {
npagesmax += 5;
pages = realloc(pages,
npagesmax *
sizeof (struct usage_page));
}
if (!pages)
err(1, "alloc");
}
curpage = &pages[npages++];
curpage->name = n;
curpage->usage = no;
curpage->pagesize = 0;
curpage->pagesizemax = 10;
curpage->page_contents =
malloc(curpage->pagesizemax *
sizeof (struct usage_in_page));
if (!curpage->page_contents)
err(1, "malloc");
}
}
fclose(f);
/*dump_hid_table();*/
}
char *
usage_page(int i)
{
static char b[10];
int k;
if (!pages)
errx(1, "no hid table\n");
for (k = 0; k < npages; k++)
if (pages[k].usage == i)
return pages[k].name;
sprintf(b, "x%x", i);
return b;
}
char *
usage_in_page(unsigned int u)
{
int page = HID_PAGE(u);
int i = HID_USAGE(u);
static char b[100];
int j, k, us;
for (k = 0; k < npages; k++)
if (pages[k].usage == page)
break;
if (k >= npages)
goto bad;
for (j = 0; j < pages[k].pagesize; j++) {
us = pages[k].page_contents[j].usage;
if (us == -1) {
sprintf(b, pages[k].page_contents[j].name, i);
return b;
}
if (us == i)
return pages[k].page_contents[j].name;
}
bad:
sprintf(b, "x%x", i);
return b;
}
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