226 lines
6.3 KiB
C
226 lines
6.3 KiB
C
/* $NetBSD: ofw_network_subr.c,v 1.2 2001/11/13 07:26:28 lukem 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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* This code is derived from software contributed to The NetBSD Foundation
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* by Jason R. Thorpe of the Numerical Aerospace Simulation Facility,
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* NASA Ames Research Center.
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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/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: ofw_network_subr.c,v 1.2 2001/11/13 07:26:28 lukem Exp $");
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/malloc.h>
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#include <sys/socket.h>
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#include <net/if.h>
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#include <net/if_media.h>
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#include <dev/ofw/openfirm.h>
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#define OFW_MAX_STACK_BUF_SIZE 256
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#define OFW_PATH_BUF_SIZE 512
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struct table_entry {
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const char *t_string;
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int t_value;
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};
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int of_network_parse_network_type __P((const char *));
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/*
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* int of_network_decode_media(phandle, nmediap, defmediap)
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*
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* This routine decodes the OFW properties `supported-network-types'
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* and `chosen-network-type'.
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*
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* Arguments:
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* phandle OFW phandle of device whos network media properties
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* are to be decoded.
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* nmediap Pointer to an integer which will be initialized
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* with the number of returned media words.
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* defmediap Pointer to an integer which will be initialized
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* with the default network media.
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*
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* Return Values:
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* An array of integers, allocated with malloc(), containing the
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* decoded media values. The number of elements in the array will
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* be stored in the location pointed to by the `nmediap' argument.
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* The default media will be stored in the location pointed to by
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* the `defmediap' argument.
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*
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* Side Effects:
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* None.
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*/
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int *
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of_network_decode_media(phandle, nmediap, defmediap)
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int phandle, *nmediap, *defmediap;
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{
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int i, len, count, med, *rv = NULL;
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char *buf = NULL, *cp, *ncp;
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len = OF_getproplen(phandle, "supported-network-types");
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if (len <= 0)
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return (NULL);
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buf = malloc(len, M_TEMP, M_WAITOK);
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/* `supported-network-types' should not change. */
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if (OF_getprop(phandle, "supported-network-types", buf, len) != len)
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goto bad;
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/*
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* Count the number of entries in the array. This is kind of tricky,
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* because they're variable-length strings, yuck.
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*/
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for (count = 0, cp = buf; cp <= (buf + len); cp++) {
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/*
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* If we encounter nul, that marks the end of a string,
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* and thus one complete media description.
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*/
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if (*cp == '\0')
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count++;
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}
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/* Sanity. */
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if (count == 0)
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goto bad;
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/* Allocate the return value array. */
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rv = malloc(count * sizeof(int), M_DEVBUF, M_WAITOK);
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/*
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* Parse each media string. If we get -1 back from the parser,
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* back off the count by one, to skip the bad entry.
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*/
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for (i = 0, cp = buf; cp <= (buf + len) && i < count; ) {
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/*
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* Find the next string now, as we may chop
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* the current one up in the parser.
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*/
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for (ncp = cp; *ncp != '\0'; ncp++)
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/* ...skip to the nul... */ ;
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ncp++; /* ...and now past it. */
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med = of_network_parse_network_type(cp);
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if (med == -1)
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count--;
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else {
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rv[i] = med;
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i++;
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}
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cp = ncp;
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}
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/* Sanity... */
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if (count == 0)
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goto bad;
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/*
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* We now have the `supported-media-types' property decoded.
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* Next step is to decode the `chosen-media-type' property,
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* if it exists.
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*/
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free(buf, M_TEMP);
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buf = NULL;
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len = OF_getproplen(phandle, "chosen-network-type");
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if (len <= 0) {
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/* Property does not exist. */
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*defmediap = -1;
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goto done;
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}
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buf = malloc(len, M_TEMP, M_WAITOK);
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if (OF_getprop(phandle, "chosen-network-type", buf, len) != len) {
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/* Something went wrong... */
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*defmediap = -1;
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goto done;
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}
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*defmediap = of_network_parse_network_type(buf);
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done:
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if (buf != NULL)
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free(buf, M_TEMP);
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*nmediap = count;
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return (rv);
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bad:
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if (rv != NULL)
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free(rv, M_DEVBUF);
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if (buf != NULL)
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free(buf, M_TEMP);
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return (NULL);
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}
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int
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of_network_parse_network_type(cp)
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const char *cp;
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{
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/*
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* We could tokenize this, but that would be a pain in
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* the neck given how the media are described. If this
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* table grows any larger, we may want to consider doing
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* that.
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*
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* Oh yes, we also only support combinations that actually
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* make sense.
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*/
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static const struct table_entry mediatab[] = {
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{ "ethernet,10,rj45,half",
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IFM_ETHER|IFM_10_T },
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{ "ethernet,10,rj45,full",
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IFM_ETHER|IFM_10_T|IFM_FDX },
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{ "ethernet,10,aui,half",
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IFM_ETHER|IFM_10_5, },
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{ "ethernet,10,bnc,half",
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IFM_ETHER|IFM_10_2, },
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{ "ethernet,100,rj45,half",
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IFM_ETHER|IFM_100_TX },
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{ "ethernet,100,rj45,full",
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IFM_ETHER|IFM_100_TX|IFM_FDX },
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{ NULL, -1 },
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};
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int i;
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for (i = 0; mediatab[i].t_string != NULL; i++) {
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if (strcmp(cp, mediatab[i].t_string) == 0)
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return (mediatab[i].t_value);
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}
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/* Not found. */
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return (-1);
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}
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