1 /* $NetBSD: ofw_network_subr.c,v 1.1 1998/07/22 22:04:14 thorpej 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/param.h> 41 #include <sys/systm.h> 42 #include <sys/malloc.h> 43 #include <sys/socket.h> 44 45 #include <net/if.h> 46 #include <net/if_media.h> 47 48 #include <dev/ofw/openfirm.h> 49 50 #define OFW_MAX_STACK_BUF_SIZE 256 51 #define OFW_PATH_BUF_SIZE 512 52 53 struct table_entry { 54 const char *t_string; 55 int t_value; 56 }; 57 58 int of_network_parse_network_type __P((const char *)); 59 60 /* 61 * int of_network_decode_media(phandle, nmediap, defmediap) 62 * 63 * This routine decodes the OFW properties `supported-network-types' 64 * and `chosen-network-type'. 65 * 66 * Arguments: 67 * phandle OFW phandle of device whos network media properties 68 * are to be decoded. 69 * nmediap Pointer to an integer which will be initialized 70 * with the number of returned media words. 71 * defmediap Pointer to an integer which will be initialized 72 * with the default network media. 73 * 74 * Return Values: 75 * An array of integers, allocated with malloc(), containing the 76 * decoded media values. The number of elements in the array will 77 * be stored in the location pointed to by the `nmediap' argument. 78 * The default media will be stored in the location pointed to by 79 * the `defmediap' argument. 80 * 81 * Side Effects: 82 * None. 83 */ 84 int * 85 of_network_decode_media(phandle, nmediap, defmediap) 86 int phandle, *nmediap, *defmediap; 87 { 88 int i, len, count, med, *rv = NULL; 89 char *buf = NULL, *cp, *ncp; 90 91 len = OF_getproplen(phandle, "supported-network-types"); 92 if (len <= 0) 93 return (NULL); 94 95 buf = malloc(len, M_TEMP, M_WAITOK); 96 97 /* `supported-network-types' should not change. */ 98 if (OF_getprop(phandle, "supported-network-types", buf, len) != len) 99 goto bad; 100 101 /* 102 * Count the number of entries in the array. This is kind of tricky, 103 * because they're variable-length strings, yuck. 104 */ 105 for (count = 0, cp = buf; cp <= (buf + len); cp++) { 106 /* 107 * If we encounter nul, that marks the end of a string, 108 * and thus one complete media description. 109 */ 110 if (*cp == '\0') 111 count++; 112 } 113 114 /* Sanity. */ 115 if (count == 0) 116 goto bad; 117 118 /* Allocate the return value array. */ 119 rv = malloc(count * sizeof(int), M_DEVBUF, M_WAITOK); 120 121 /* 122 * Parse each media string. If we get -1 back from the parser, 123 * back off the count by one, to skip the bad entry. 124 */ 125 for (i = 0, cp = buf; cp <= (buf + len) && i < count; ) { 126 /* 127 * Find the next string now, as we may chop 128 * the current one up in the parser. 129 */ 130 for (ncp = cp; *ncp != '\0'; ncp++) 131 /* ...skip to the nul... */ ; 132 ncp++; /* ...and now past it. */ 133 134 med = of_network_parse_network_type(cp); 135 if (med == -1) 136 count--; 137 else { 138 rv[i] = med; 139 i++; 140 } 141 cp = ncp; 142 } 143 144 /* Sanity... */ 145 if (count == 0) 146 goto bad; 147 148 /* 149 * We now have the `supported-media-types' property decoded. 150 * Next step is to decode the `chosen-media-type' property, 151 * if it exists. 152 */ 153 free(buf, M_TEMP); 154 buf = NULL; 155 len = OF_getproplen(phandle, "chosen-network-type"); 156 if (len <= 0) { 157 /* Property does not exist. */ 158 *defmediap = -1; 159 goto done; 160 } 161 162 buf = malloc(len, M_TEMP, M_WAITOK); 163 if (OF_getprop(phandle, "chosen-network-type", buf, len) != len) { 164 /* Something went wrong... */ 165 *defmediap = -1; 166 goto done; 167 } 168 169 *defmediap = of_network_parse_network_type(buf); 170 171 done: 172 if (buf != NULL) 173 free(buf, M_TEMP); 174 *nmediap = count; 175 return (rv); 176 177 bad: 178 if (rv != NULL) 179 free(rv, M_DEVBUF); 180 if (buf != NULL) 181 free(buf, M_TEMP); 182 return (NULL); 183 } 184 185 int 186 of_network_parse_network_type(cp) 187 const char *cp; 188 { 189 /* 190 * We could tokenize this, but that would be a pain in 191 * the neck given how the media are described. If this 192 * table grows any larger, we may want to consider doing 193 * that. 194 * 195 * Oh yes, we also only support combinations that actually 196 * make sense. 197 */ 198 static const struct table_entry mediatab[] = { 199 { "ethernet,10,rj45,half", 200 IFM_ETHER|IFM_10_T }, 201 { "ethernet,10,rj45,full", 202 IFM_ETHER|IFM_10_T|IFM_FDX }, 203 { "ethernet,10,aui,half", 204 IFM_ETHER|IFM_10_5, }, 205 { "ethernet,10,bnc,half", 206 IFM_ETHER|IFM_10_2, }, 207 { "ethernet,100,rj45,half", 208 IFM_ETHER|IFM_100_TX }, 209 { "ethernet,100,rj45,full", 210 IFM_ETHER|IFM_100_TX|IFM_FDX }, 211 { NULL, -1 }, 212 }; 213 int i; 214 215 for (i = 0; mediatab[i].t_string != NULL; i++) { 216 if (strcmp(cp, mediatab[i].t_string) == 0) 217 return (mediatab[i].t_value); 218 } 219 220 /* Not found. */ 221 return (-1); 222 } 223