1 /* 2 * mjs copyright 3 * 4 */ 5 6 #include <sys/cdefs.h> 7 /* 8 * "Plug and Play" functionality. 9 * 10 * We use the PnP enumerators to obtain identifiers for installed hardware, 11 * and the contents of a database to determine modules to be loaded to support 12 * such hardware. 13 */ 14 15 #include <stand.h> 16 #include <string.h> 17 #include <bootstrap.h> 18 19 static struct pnpinfo_stql pnp_devices; 20 static int pnp_devices_initted = 0; 21 22 static void pnp_discard(void); 23 24 /* 25 * Perform complete enumeration sweep 26 */ 27 28 COMMAND_SET(pnpscan, "pnpscan", "scan for PnP devices", pnp_scan); 29 30 static int 31 pnp_scan(int argc, char *argv[]) 32 { 33 struct pnpinfo *pi; 34 int hdlr; 35 int verbose; 36 int ch; 37 38 if (pnp_devices_initted == 0) { 39 STAILQ_INIT(&pnp_devices); 40 pnp_devices_initted = 1; 41 } 42 43 verbose = 0; 44 optind = 1; 45 optreset = 1; 46 while ((ch = getopt(argc, argv, "v")) != -1) { 47 switch(ch) { 48 case 'v': 49 verbose = 1; 50 break; 51 case '?': 52 default: 53 /* getopt has already reported an error */ 54 return(CMD_OK); 55 } 56 } 57 58 /* forget anything we think we knew */ 59 pnp_discard(); 60 61 /* iterate over all of the handlers */ 62 for (hdlr = 0; pnphandlers[hdlr] != NULL; hdlr++) { 63 if (verbose) 64 printf("Probing %s...\n", pnphandlers[hdlr]->pp_name); 65 pnphandlers[hdlr]->pp_enumerate(); 66 } 67 if (verbose) { 68 pager_open(); 69 if (pager_output("PNP scan summary:\n")) 70 goto out; 71 STAILQ_FOREACH(pi, &pnp_devices, pi_link) { 72 pager_output(STAILQ_FIRST(&pi->pi_ident)->id_ident); /* first ident should be canonical */ 73 if (pi->pi_desc != NULL) { 74 pager_output(" : "); 75 pager_output(pi->pi_desc); 76 } 77 if (pager_output("\n")) 78 break; 79 } 80 out: 81 pager_close(); 82 } 83 return(CMD_OK); 84 } 85 86 /* 87 * Throw away anything we think we know about PnP devices. 88 */ 89 static void 90 pnp_discard(void) 91 { 92 struct pnpinfo *pi; 93 94 while (STAILQ_FIRST(&pnp_devices) != NULL) { 95 pi = STAILQ_FIRST(&pnp_devices); 96 STAILQ_REMOVE_HEAD(&pnp_devices, pi_link); 97 pnp_freeinfo(pi); 98 } 99 } 100 101 /* 102 * Add a unique identifier to (pi) 103 */ 104 void 105 pnp_addident(struct pnpinfo *pi, char *ident) 106 { 107 struct pnpident *id; 108 109 STAILQ_FOREACH(id, &pi->pi_ident, id_link) 110 if (!strcmp(id->id_ident, ident)) 111 return; /* already have this one */ 112 113 id = malloc(sizeof(struct pnpident)); 114 id->id_ident = strdup(ident); 115 STAILQ_INSERT_TAIL(&pi->pi_ident, id, id_link); 116 } 117 118 /* 119 * Allocate a new pnpinfo struct 120 */ 121 struct pnpinfo * 122 pnp_allocinfo(void) 123 { 124 struct pnpinfo *pi; 125 126 pi = malloc(sizeof(struct pnpinfo)); 127 bzero(pi, sizeof(struct pnpinfo)); 128 STAILQ_INIT(&pi->pi_ident); 129 return(pi); 130 } 131 132 /* 133 * Release storage held by a pnpinfo struct 134 */ 135 void 136 pnp_freeinfo(struct pnpinfo *pi) 137 { 138 struct pnpident *id; 139 140 while (!STAILQ_EMPTY(&pi->pi_ident)) { 141 id = STAILQ_FIRST(&pi->pi_ident); 142 STAILQ_REMOVE_HEAD(&pi->pi_ident, id_link); 143 free(id->id_ident); 144 free(id); 145 } 146 if (pi->pi_desc) 147 free(pi->pi_desc); 148 if (pi->pi_module) 149 free(pi->pi_module); 150 if (pi->pi_argv) 151 free(pi->pi_argv); 152 free(pi); 153 } 154 155 /* 156 * Add a new pnpinfo struct to the list. 157 */ 158 void 159 pnp_addinfo(struct pnpinfo *pi) 160 { 161 STAILQ_INSERT_TAIL(&pnp_devices, pi, pi_link); 162 } 163 164 165 /* 166 * Format an EISA id as a string in standard ISA PnP format, AAAIIRR 167 * where 'AAA' is the EISA vendor ID, II is the product ID and RR the revision ID. 168 */ 169 char * 170 pnp_eisaformat(uint8_t *data) 171 { 172 static char idbuf[8]; 173 const char hextoascii[] = "0123456789abcdef"; 174 175 idbuf[0] = '@' + ((data[0] & 0x7c) >> 2); 176 idbuf[1] = '@' + (((data[0] & 0x3) << 3) + ((data[1] & 0xe0) >> 5)); 177 idbuf[2] = '@' + (data[1] & 0x1f); 178 idbuf[3] = hextoascii[(data[2] >> 4)]; 179 idbuf[4] = hextoascii[(data[2] & 0xf)]; 180 idbuf[5] = hextoascii[(data[3] >> 4)]; 181 idbuf[6] = hextoascii[(data[3] & 0xf)]; 182 idbuf[7] = 0; 183 return(idbuf); 184 } 185