612 lines
14 KiB
C
612 lines
14 KiB
C
/*
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* Copyright (c) 1995 Andrew McRae. All rights reserved.
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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. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* $Id: readcis.c,v 1.5 1996/06/17 22:30:29 nate Exp $
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*/
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#include <stdio.h>
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#include <unistd.h>
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#include <stdlib.h>
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#include <string.h>
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#include <sys/ioctl.h>
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#include <pccard/card.h>
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#include <pccard/cis.h>
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#include "readcis.h"
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static int read_attr(int, char *, int);
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static int ck_linktarget(int, off_t, int);
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static void cis_info(struct cis *, unsigned char *, int);
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static void device_desc(unsigned char *, int, struct dev_mem *);
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static void config_map(struct cis *, unsigned char *, int);
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static void cis_config(struct cis *, unsigned char *, int);
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static struct tuple_list *read_one_tuplelist(int, int, off_t);
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static struct tuple_list *read_tuples(int);
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static struct tuple *find_tuple_in_list(struct tuple_list *, unsigned char);
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static struct tuple_info *get_tuple_info(unsigned char);
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static struct tuple_info tuple_info[] = {
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{"Null tuple", 0x00, 0},
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{"Common memory descriptor", 0x01, 255},
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{"Checksum", 0x10, 5},
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{"Long link to attribute memory", 0x11, 4},
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{"Long link to common memory", 0x12, 4},
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{"Link target", 0x13, 3},
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{"No link", 0x14, 0},
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{"Version 1 info", 0x15, 255},
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{"Alternate language string", 0x16, 255},
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{"Attribute memory descriptor", 0x17, 255},
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{"JEDEC descr for common memory", 0x18, 255},
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{"JEDEC descr for attribute memory", 0x19, 255},
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{"Configuration map", 0x1A, 255},
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{"Configuration entry", 0x1B, 255},
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{"Other conditions for common memory", 0x1C, 255},
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{"Other conditions for attribute memory", 0x1D, 255},
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{"Geometry info for common memory", 0x1E, 255},
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{"Geometry info for attribute memory", 0x1F, 255},
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{"Manufacturer ID", 0x20, 4},
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{"Functional ID", 0x21, 255},
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{"Functional EXT", 0x22, 255},
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{"Software interleave", 0x23, 2},
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{"Version 2 Info", 0x40, 255},
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{"Data format", 0x41, 255},
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{"Geometry", 0x42, 4},
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{"Byte order", 0x43, 2},
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{"Card init date", 0x44, 4},
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{"Battery replacement", 0x45, 4},
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{"Organisation", 0x46, 255},
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{"Terminator", 0xFF, 255},
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{0, 0, 0}
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};
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/*
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* After reading the tuples, decode the relevant ones.
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*/
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struct cis *
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readcis(int fd)
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{
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struct tuple_list *tl;
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struct tuple *tp;
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struct cis *cp;
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cp = xmalloc(sizeof(*cp));
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cp->tlist = read_tuples(fd);
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if (cp->tlist == 0)
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return (NULL);
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for (tl = cp->tlist; tl; tl = tl->next)
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for (tp = tl->tuples; tp; tp = tp->next) {
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#if 0
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printf("tuple code = 0x%02x, data is\n", tp->code);
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dump(tp->data, tp->length);
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#endif
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switch (tp->code) {
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case CIS_MEM_COMMON: /* 0x01 */
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device_desc(tp->data, tp->length, &cp->common_mem);
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break;
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case CIS_INFO_V1: /* 0x15 */
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cis_info(cp, tp->data, tp->length);
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break;
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case CIS_MEM_ATTR: /* 0x17 */
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device_desc(tp->data, tp->length, &cp->attr_mem);
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break;
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case CIS_CONF_MAP: /* 0x1A */
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config_map(cp, tp->data, tp->length);
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break;
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case CIS_CONFIG: /* 0x1B */
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cis_config(cp, tp->data, tp->length);
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break;
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}
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}
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return (cp);
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}
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/*
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* free_cis - delete cis entry.
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*/
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void
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freecis(struct cis *cp)
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{
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struct cis_ioblk *io;
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struct cis_memblk *mem;
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struct cis_config *conf;
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struct tuple *tp;
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struct tuple_list *tl;
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while ((tl = cp->tlist) != 0) {
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cp->tlist = tl->next;
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while ((tp = tl->tuples) != 0) {
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tl->tuples = tp->next;
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if (tp->data)
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free(tp->data);
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}
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}
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while ((conf = cp->conf) != 0) {
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cp->conf = conf->next;
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while ((io = conf->io) != 0) {
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conf->io = io->next;
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free(io);
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}
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while ((mem = conf->mem) != 0) {
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conf->mem = mem->next;
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free(mem);
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}
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free(conf);
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}
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free(cp);
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}
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/*
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* Fills in CIS version data.
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*/
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static void
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cis_info(struct cis *cp, unsigned char *p, int len)
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{
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cp->maj_v = *p++;
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cp->min_v = *p++;
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strncpy(cp->manuf, p, CIS_MAXSTR - 1);
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while (*p++);
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strncpy(cp->vers, p, CIS_MAXSTR - 1);
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while (*p++);
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strncpy(cp->add_info1, p, CIS_MAXSTR - 1);
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while (*p++);
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strncpy(cp->add_info2, p, CIS_MAXSTR - 1);
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}
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/*
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* device_desc - decode device descriptor.
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*/
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static void
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device_desc(unsigned char *p, int len, struct dev_mem *dp)
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{
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while (len > 0 && *p != 0xFF) {
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dp->valid = 1;
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dp->type = (*p & 0xF0) >> 4;
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dp->wps = !!(*p & 0x8);
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dp->speed = *p & 7;
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p++;
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if (*p != 0xFF) {
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dp->addr = *p >> 3;
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dp->units = *p & 7;
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}
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p++;
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len -= 2;
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}
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}
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/*
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* configuration map of card control register.
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*/
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static void
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config_map(struct cis *cp, unsigned char *p, int len)
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{
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unsigned char *p1;
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int i;
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union {
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unsigned long l;
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unsigned char b[4];
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} u;
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p1 = p + 1;
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cp->last_config = *p1++ & 0x3F;
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u.l = 0;
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for (i = 0; i <= (*p & 3); i++)
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u.b[i] = *p1++;
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cp->reg_addr = u.l;
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cp->ccrs = *p1;
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}
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/*
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* CIS config entry - Decode and build configuration entry.
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*/
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static void
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cis_config(struct cis *cp, unsigned char *p, int len)
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{
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int x;
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int i, j;
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union {
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unsigned long l;
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unsigned char b[4];
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} u;
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struct cis_config *conf, *last;
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struct cis_memblk *mem;
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unsigned char feat;
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struct cis_memblk *lastmem = 0;
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conf = xmalloc(sizeof(*conf));
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if ((last = cp->conf) != 0) {
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while (last->next)
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last = last->next;
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last->next = conf;
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} else
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cp->conf = conf;
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conf->id = *p & 0x3F;
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if (*p & 0x40)
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cp->def_config = conf;
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if (*p++ & 0x80)
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p++;
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feat = *p++;
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for (i = 0; i < CIS_FEAT_POWER(feat); i++) {
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unsigned char parms = *p++;
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conf->pwr = 1;
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for (j = 0; j < 8; j++)
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if (parms & (1 << j))
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while (*p++ & 0x80);
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}
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if (feat & CIS_FEAT_TIMING) {
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conf->timing = 1;
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i = *p++;
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if (CIS_WAIT_SCALE(i) != 3)
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p++;
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if (CIS_READY_SCALE(i) != 7)
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p++;
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if (CIS_RESERVED_SCALE(i) != 7)
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p++;
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}
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if (feat & CIS_FEAT_I_O) {
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conf->iospace = 1;
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if (CIS_IO_RANGE & *p)
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conf->io_blks = CIS_IO_BLKS(p[1]) + 1;
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conf->io_addr = CIS_IO_ADDR(*p);
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conf->io_bus = (*p >> 5) & 3;
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if (*p++ & CIS_IO_RANGE) {
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struct cis_ioblk *io, *last = 0;
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i = CIS_IO_ADSZ(*p);
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j = CIS_IO_BLKSZ(*p++);
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for (x = 0; x < conf->io_blks; x++) {
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io = xmalloc(sizeof(*io));
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if (last)
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last->next = io;
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else
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conf->io = io;
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last = io;
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u.l = 0;
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switch (i) {
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case 0:
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break;
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case 1:
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u.b[0] = *p++;
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break;
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case 2:
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u.b[0] = *p++;
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u.b[1] = *p++;
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break;
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case 3:
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u.b[0] = *p++;
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u.b[1] = *p++;
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u.b[2] = *p++;
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u.b[3] = *p++;
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break;
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}
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io->addr = u.l;
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u.l = 0;
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switch (j) {
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case 0:
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break;
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case 1:
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u.b[0] = *p++;
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u.l++;
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break;
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case 2:
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u.b[0] = *p++;
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u.b[1] = *p++;
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u.l++;
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break;
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case 3:
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u.b[0] = *p++;
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u.b[1] = *p++;
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u.b[2] = *p++;
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u.b[3] = *p++;
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u.l++;
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break;
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}
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io->size = u.l;
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}
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}
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}
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if (feat & CIS_FEAT_IRQ) {
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conf->irq = 1;
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conf->irqlevel = *p & 0xF;
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conf->irq_flags = *p & 0xF0;
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if (*p++ & CIS_IRQ_MASK) {
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conf->irq_mask = (p[1] << 8) | p[0];
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p += 2;
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}
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}
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switch (CIS_FEAT_MEMORY(feat)) {
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case 0:
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break;
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case 1:
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conf->memspace = 1;
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conf->mem = xmalloc(sizeof(*conf->mem));
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conf->mem->length = ((p[1] << 8) | p[0]) << 8;
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break;
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case 2:
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conf->memspace = 1;
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conf->mem = xmalloc(sizeof(*conf->mem));
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conf->mem->length = ((p[1] << 8) | p[0]) << 8;
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conf->mem->address = ((p[3] << 8) | p[2]) << 8;
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break;
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case 3:
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conf->memspace = 1;
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x = *p++;
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conf->memwins = CIS_MEM_WINS(x);
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for (i = 0; i < conf->memwins; i++) {
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mem = xmalloc(sizeof(*mem));
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if (i == 0)
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conf->mem = mem;
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else
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lastmem->next = mem;
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lastmem = mem;
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u.l = 0;
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for (j = 0; j < CIS_MEM_LENSZ(x); j++)
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u.b[j] = *p++;
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mem->length = u.l << 8;
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u.l = 0;
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for (j = 0; j < CIS_MEM_ADDRSZ(x); j++)
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u.b[j] = *p++;
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mem->address = u.l << 8;
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if (x & CIS_MEM_HOST) {
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u.l = 0;
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for (j = 0; j < CIS_MEM_ADDRSZ(x); j++)
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u.b[j] = *p++;
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mem->host_address = u.l << 8;
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}
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}
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break;
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}
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if (feat & 0x80) {
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conf->misc_valid = 1;
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conf->misc = *p++;
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}
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}
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/*
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* Read the tuples from the card.
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* The processing of tuples is as follows:
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* - Read tuples at attribute memory, offset 0.
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* - If a CIS_END is the first tuple, look for
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* a tuple list at common memory offset 0; this list
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* must start with a LINKTARGET.
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* - If a long link tuple was encountered, execute the long
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* link.
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* - If a no-link tuple was seen, terminate processing.
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* - If no no-link tuple exists, and no long link tuple
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* exists while processing the primary tuple list,
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* then look for a LINKTARGET tuple in common memory.
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* - If a long link tuple is found in any list, then process
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* it. Only one link is allowed per list.
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*/
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static struct tuple_list *tlist;
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static struct tuple_list *
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read_tuples(int fd)
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{
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struct tuple_list *tl = 0, *last_tl;
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struct tuple *tp;
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int flag;
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off_t offs;
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tlist = 0;
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last_tl = tlist = read_one_tuplelist(fd, MDF_ATTR, (off_t) 0);
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/* Now start processing the links (if any). */
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do {
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flag = MDF_ATTR;
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tp = find_tuple_in_list(last_tl, CIS_LONGLINK_A);
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if (tp == 0) {
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flag = 0;
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tp = find_tuple_in_list(last_tl, CIS_LONGLINK_C);
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}
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if (tp && tp->length == 4) {
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offs = tp->data[0] |
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(tp->data[1] << 8) |
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(tp->data[2] << 16) |
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(tp->data[3] << 24);
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#ifdef DEBUG
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printf("Checking long link at %ld (%s memory)\n",
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offs, flag ? "Attribute" : "Common");
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#endif
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/* If a link was found, read the tuple list from it. */
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if (ck_linktarget(fd, offs, flag)) {
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tl = read_one_tuplelist(fd, flag, offs);
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last_tl->next = tl;
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last_tl = tl;
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}
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}
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} while (tl);
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/*
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* If the primary list had no NOLINK tuple, and no LINKTARGET,
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* then try to read a tuple list at common memory (offset 0).
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*/
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if (find_tuple_in_list(tlist, CIS_NOLINK) == 0 && tlist->next == 0 &&
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ck_linktarget(fd, (off_t) 0, 0)) {
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#ifdef DEBUG
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printf("Reading long link at %ld (%s memory)\n",
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offs, flag ? "Attribute" : "Common");
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#endif
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tlist->next = read_one_tuplelist(fd, 0, (off_t) 0);
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}
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return (tlist);
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}
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/*
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* Read one tuple list from the card.
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*/
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static struct tuple_list *
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read_one_tuplelist(int fd, int flags, off_t offs)
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{
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struct tuple *tp, *last_tp = 0;
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struct tuple_list *tl;
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struct tuple_info *tinfo;
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int total = 0;
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unsigned char code, length;
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/* Check to see if this memory has already been scanned. */
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for (tl = tlist; tl; tl = tl->next)
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if (tl->offs == offs && tl->flags == (flags & MDF_ATTR))
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return (0);
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tl = xmalloc(sizeof(*tl));
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tl->offs = offs;
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tl->flags = flags & MDF_ATTR;
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ioctl(fd, PIOCRWFLAG, &flags);
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lseek(fd, offs, SEEK_SET);
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do {
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if (read_attr(fd, &code, 1) != 1) {
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perror("CIS code read");
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break;
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}
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total++;
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if (code == CIS_NULL)
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continue;
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tp = xmalloc(sizeof(*tp));
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tp->code = code;
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if (read_attr(fd, &length, 1) != 1) {
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perror("CIS len read");
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break;
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}
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total++;
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tp->length = length;
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#ifdef DEBUG
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fprintf(stderr, "Tuple code = 0x%x, len = %d\n",
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code, length);
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#endif
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if (length == 0xFF) {
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length = tp->length = 0;
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code = CIS_END;
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}
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if (length != 0) {
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total += length;
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tp->data = xmalloc(length);
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if (read_attr(fd, tp->data, length) != length) {
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perror("CIS read");
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break;
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}
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}
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/*
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* Check the tuple, and ignore it if it isn't in the table
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|
* or the length is illegal.
|
|
*/
|
|
tinfo = get_tuple_info(code);
|
|
if (tinfo == 0 || (tinfo->length != 255 && tinfo->length != length)) {
|
|
printf("code %s ignored\n", tuple_name(code));
|
|
tp->code = CIS_NULL;
|
|
}
|
|
if (tl->tuples == 0)
|
|
tl->tuples = tp;
|
|
else
|
|
last_tp->next = tp;
|
|
last_tp = tp;
|
|
} while (code != CIS_END && total < 1024);
|
|
return (tl);
|
|
}
|
|
|
|
/*
|
|
* return true if the offset points to a LINKTARGET tuple.
|
|
*/
|
|
static int
|
|
ck_linktarget(int fd, off_t offs, int flag)
|
|
{
|
|
char blk[5];
|
|
|
|
ioctl(fd, PIOCRWFLAG, &flag);
|
|
lseek(fd, offs, SEEK_SET);
|
|
if (read_attr(fd, blk, 5) != 5)
|
|
return (0);
|
|
if (blk[0] == 0x13 &&
|
|
blk[1] == 0x3 &&
|
|
blk[2] == 'C' &&
|
|
blk[3] == 'I' &&
|
|
blk[4] == 'S')
|
|
return (1);
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* find_tuple_in_list - find a tuple within a
|
|
* single tuple list.
|
|
*/
|
|
static struct tuple *
|
|
find_tuple_in_list(struct tuple_list *tl, unsigned char code)
|
|
{
|
|
struct tuple *tp;
|
|
|
|
for (tp = tl->tuples; tp; tp = tp->next)
|
|
if (tp->code == code)
|
|
break;
|
|
return (tp);
|
|
}
|
|
|
|
static int
|
|
read_attr(int fd, char *bp, int len)
|
|
{
|
|
char blk[1024], *p = blk;
|
|
int i, l;
|
|
|
|
if (len > sizeof(blk) / 2)
|
|
len = sizeof(blk) / 2;
|
|
l = i = read(fd, blk, len * 2);
|
|
if (i <= 0) {
|
|
printf("Read return %d bytes (expected %d)\n", i, len * 2);
|
|
return (i);
|
|
}
|
|
while (i > 0) {
|
|
*bp++ = *p++;
|
|
p++;
|
|
i -= 2;
|
|
}
|
|
return (l / 2);
|
|
}
|
|
|
|
/*
|
|
* return table entry for code.
|
|
*/
|
|
static struct tuple_info *
|
|
get_tuple_info(unsigned char code)
|
|
{
|
|
struct tuple_info *tp;
|
|
|
|
for (tp = tuple_info; tp->name; tp++)
|
|
if (tp->code == code)
|
|
return (tp);
|
|
printf("Code %d not found\n", code);
|
|
return (0);
|
|
}
|
|
|
|
char *
|
|
tuple_name(unsigned char code)
|
|
{
|
|
struct tuple_info *tp;
|
|
|
|
tp = get_tuple_info(code);
|
|
if (tp)
|
|
return (tp->name);
|
|
return ("Unknown");
|
|
}
|