1 /* $NetBSD: ofw_network_subr.c,v 1.2 2001/11/13 07:26:28 lukem Exp $ */ 2 3 /*- 4 * Copyright (c) 1998 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Jason R. Thorpe of the Numerical Aerospace Simulation Facility, 9 * NASA Ames Research Center. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 3. All advertising materials mentioning features or use of this software 20 * must display the following acknowledgement: 21 * This product includes software developed by the NetBSD 22 * Foundation, Inc. and its contributors. 23 * 4. Neither the name of The NetBSD Foundation nor the names of its 24 * contributors may be used to endorse or promote products derived 25 * from this software without specific prior written permission. 26 * 27 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 28 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 29 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 30 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 31 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 32 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 33 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 34 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 35 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 36 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 37 * POSSIBILITY OF SUCH DAMAGE. 38 */ 39 40 #include <sys/cdefs.h> 41 __KERNEL_RCSID(0, "$NetBSD: ofw_network_subr.c,v 1.2 2001/11/13 07:26:28 lukem Exp $"); 42 43 #include <sys/param.h> 44 #include <sys/systm.h> 45 #include <sys/malloc.h> 46 #include <sys/socket.h> 47 48 #include <net/if.h> 49 #include <net/if_media.h> 50 51 #include <dev/ofw/openfirm.h> 52 53 #define OFW_MAX_STACK_BUF_SIZE 256 54 #define OFW_PATH_BUF_SIZE 512 55 56 struct table_entry { 57 const char *t_string; 58 int t_value; 59 }; 60 61 int of_network_parse_network_type __P((const char *)); 62 63 /* 64 * int of_network_decode_media(phandle, nmediap, defmediap) 65 * 66 * This routine decodes the OFW properties `supported-network-types' 67 * and `chosen-network-type'. 68 * 69 * Arguments: 70 * phandle OFW phandle of device whos network media properties 71 * are to be decoded. 72 * nmediap Pointer to an integer which will be initialized 73 * with the number of returned media words. 74 * defmediap Pointer to an integer which will be initialized 75 * with the default network media. 76 * 77 * Return Values: 78 * An array of integers, allocated with malloc(), containing the 79 * decoded media values. The number of elements in the array will 80 * be stored in the location pointed to by the `nmediap' argument. 81 * The default media will be stored in the location pointed to by 82 * the `defmediap' argument. 83 * 84 * Side Effects: 85 * None. 86 */ 87 int * 88 of_network_decode_media(phandle, nmediap, defmediap) 89 int phandle, *nmediap, *defmediap; 90 { 91 int i, len, count, med, *rv = NULL; 92 char *buf = NULL, *cp, *ncp; 93 94 len = OF_getproplen(phandle, "supported-network-types"); 95 if (len <= 0) 96 return (NULL); 97 98 buf = malloc(len, M_TEMP, M_WAITOK); 99 100 /* `supported-network-types' should not change. */ 101 if (OF_getprop(phandle, "supported-network-types", buf, len) != len) 102 goto bad; 103 104 /* 105 * Count the number of entries in the array. This is kind of tricky, 106 * because they're variable-length strings, yuck. 107 */ 108 for (count = 0, cp = buf; cp <= (buf + len); cp++) { 109 /* 110 * If we encounter nul, that marks the end of a string, 111 * and thus one complete media description. 112 */ 113 if (*cp == '\0') 114 count++; 115 } 116 117 /* Sanity. */ 118 if (count == 0) 119 goto bad; 120 121 /* Allocate the return value array. */ 122 rv = malloc(count * sizeof(int), M_DEVBUF, M_WAITOK); 123 124 /* 125 * Parse each media string. If we get -1 back from the parser, 126 * back off the count by one, to skip the bad entry. 127 */ 128 for (i = 0, cp = buf; cp <= (buf + len) && i < count; ) { 129 /* 130 * Find the next string now, as we may chop 131 * the current one up in the parser. 132 */ 133 for (ncp = cp; *ncp != '\0'; ncp++) 134 /* ...skip to the nul... */ ; 135 ncp++; /* ...and now past it. */ 136 137 med = of_network_parse_network_type(cp); 138 if (med == -1) 139 count--; 140 else { 141 rv[i] = med; 142 i++; 143 } 144 cp = ncp; 145 } 146 147 /* Sanity... */ 148 if (count == 0) 149 goto bad; 150 151 /* 152 * We now have the `supported-media-types' property decoded. 153 * Next step is to decode the `chosen-media-type' property, 154 * if it exists. 155 */ 156 free(buf, M_TEMP); 157 buf = NULL; 158 len = OF_getproplen(phandle, "chosen-network-type"); 159 if (len <= 0) { 160 /* Property does not exist. */ 161 *defmediap = -1; 162 goto done; 163 } 164 165 buf = malloc(len, M_TEMP, M_WAITOK); 166 if (OF_getprop(phandle, "chosen-network-type", buf, len) != len) { 167 /* Something went wrong... */ 168 *defmediap = -1; 169 goto done; 170 } 171 172 *defmediap = of_network_parse_network_type(buf); 173 174 done: 175 if (buf != NULL) 176 free(buf, M_TEMP); 177 *nmediap = count; 178 return (rv); 179 180 bad: 181 if (rv != NULL) 182 free(rv, M_DEVBUF); 183 if (buf != NULL) 184 free(buf, M_TEMP); 185 return (NULL); 186 } 187 188 int 189 of_network_parse_network_type(cp) 190 const char *cp; 191 { 192 /* 193 * We could tokenize this, but that would be a pain in 194 * the neck given how the media are described. If this 195 * table grows any larger, we may want to consider doing 196 * that. 197 * 198 * Oh yes, we also only support combinations that actually 199 * make sense. 200 */ 201 static const struct table_entry mediatab[] = { 202 { "ethernet,10,rj45,half", 203 IFM_ETHER|IFM_10_T }, 204 { "ethernet,10,rj45,full", 205 IFM_ETHER|IFM_10_T|IFM_FDX }, 206 { "ethernet,10,aui,half", 207 IFM_ETHER|IFM_10_5, }, 208 { "ethernet,10,bnc,half", 209 IFM_ETHER|IFM_10_2, }, 210 { "ethernet,100,rj45,half", 211 IFM_ETHER|IFM_100_TX }, 212 { "ethernet,100,rj45,full", 213 IFM_ETHER|IFM_100_TX|IFM_FDX }, 214 { NULL, -1 }, 215 }; 216 int i; 217 218 for (i = 0; mediatab[i].t_string != NULL; i++) { 219 if (strcmp(cp, mediatab[i].t_string) == 0) 220 return (mediatab[i].t_value); 221 } 222 223 /* Not found. */ 224 return (-1); 225 } 226