1 /* $OpenBSD: tc.c,v 1.20 2010/11/11 17:54:54 miod Exp $ */ 2 /* $NetBSD: tc.c,v 1.29 2001/11/13 06:26:10 lukem Exp $ */ 3 4 /* 5 * Copyright (c) 1994, 1995 Carnegie-Mellon University. 6 * All rights reserved. 7 * 8 * Author: Chris G. Demetriou 9 * 10 * Permission to use, copy, modify and distribute this software and 11 * its documentation is hereby granted, provided that both the copyright 12 * notice and this permission notice appear in all copies of the 13 * software, derivative works or modified versions, and any portions 14 * thereof, and that both notices appear in supporting documentation. 15 * 16 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" 17 * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND 18 * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. 19 * 20 * Carnegie Mellon requests users of this software to return to 21 * 22 * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU 23 * School of Computer Science 24 * Carnegie Mellon University 25 * Pittsburgh PA 15213-3890 26 * 27 * any improvements or extensions that they make and grant Carnegie the 28 * rights to redistribute these changes. 29 */ 30 31 #include <sys/param.h> 32 #include <sys/systm.h> 33 #include <sys/device.h> 34 35 #include <dev/tc/tcreg.h> 36 #include <dev/tc/tcvar.h> 37 38 39 /* Definition of the driver for autoconfig. */ 40 int tcmatch(struct device *, void *, void *); 41 void tcattach(struct device *, struct device *, void *); 42 43 struct cfattach tc_ca = { 44 sizeof(struct tc_softc), tcmatch, tcattach 45 }; 46 47 struct cfdriver tc_cd = { 48 NULL, "tc", DV_DULL 49 }; 50 51 int tcprint(void *, const char *); 52 int tcsubmatch(struct device *, void *, void *); 53 int tc_checkslot(tc_addr_t, char *); 54 void tc_devinfo(const char *, char *, size_t); 55 56 int 57 tcmatch(parent, vcf, aux) 58 struct device *parent; 59 void *vcf, *aux; 60 { 61 struct tcbus_attach_args *tba = aux; 62 struct cfdata *cf = vcf; 63 64 if (strcmp(tba->tba_busname, cf->cf_driver->cd_name)) 65 return (0); 66 67 return (1); 68 } 69 70 void 71 tcattach(parent, self, aux) 72 struct device *parent; 73 struct device *self; 74 void *aux; 75 { 76 struct tc_softc *sc = (struct tc_softc *)self; 77 struct tcbus_attach_args *tba = aux; 78 struct tc_attach_args ta; 79 const struct tc_builtin *builtin; 80 struct tc_slotdesc *slot; 81 tc_addr_t tcaddr; 82 int i; 83 84 if (tba->tba_speed & 1) 85 printf(": %d.5 MHz clock\n", tba->tba_speed / 2); 86 else 87 printf(": %d MHz clock\n", tba->tba_speed / 2); 88 89 /* 90 * Save important CPU/chipset information. 91 */ 92 sc->sc_speed = tba->tba_speed; 93 sc->sc_nslots = tba->tba_nslots; 94 sc->sc_slots = tba->tba_slots; 95 sc->sc_intr_establish = tba->tba_intr_establish; 96 sc->sc_intr_disestablish = tba->tba_intr_disestablish; 97 sc->sc_get_dma_tag = tba->tba_get_dma_tag; 98 99 /* 100 * Try to configure each built-in device 101 */ 102 for (i = 0; i < tba->tba_nbuiltins; i++) { 103 builtin = &tba->tba_builtins[i]; 104 105 /* sanity check! */ 106 if (builtin->tcb_slot > sc->sc_nslots) 107 panic("tcattach: builtin %d slot > nslots", i); 108 109 /* 110 * Make sure device is really there, because some 111 * built-in devices are really optional. 112 */ 113 tcaddr = sc->sc_slots[builtin->tcb_slot].tcs_addr + 114 builtin->tcb_offset; 115 if (tc_badaddr(tcaddr)) 116 continue; 117 118 /* 119 * Set up the device attachment information. 120 */ 121 strncpy(ta.ta_modname, builtin->tcb_modname, TC_ROM_LLEN); 122 ta.ta_memt = tba->tba_memt; 123 ta.ta_dmat = (*sc->sc_get_dma_tag)(builtin->tcb_slot); 124 ta.ta_modname[TC_ROM_LLEN] = '\0'; 125 ta.ta_slot = builtin->tcb_slot; 126 ta.ta_offset = builtin->tcb_offset; 127 ta.ta_addr = tcaddr; 128 ta.ta_cookie = builtin->tcb_cookie; 129 ta.ta_busspeed = sc->sc_speed; 130 131 /* 132 * Mark the slot as used, so we don't check it later. 133 */ 134 sc->sc_slots[builtin->tcb_slot].tcs_used = 1; 135 136 /* 137 * Attach the device. 138 */ 139 config_found_sm(self, &ta, tcprint, tcsubmatch); 140 } 141 142 /* 143 * Try to configure each unused slot, last to first. 144 */ 145 for (i = sc->sc_nslots - 1; i >= 0; i--) { 146 slot = &sc->sc_slots[i]; 147 148 /* If already checked above, don't look again now. */ 149 if (slot->tcs_used) 150 continue; 151 152 /* 153 * Make sure something is there, and find out what it is. 154 */ 155 tcaddr = slot->tcs_addr; 156 if (tc_badaddr(tcaddr)) 157 continue; 158 if (tc_checkslot(tcaddr, ta.ta_modname) == 0) 159 continue; 160 161 /* 162 * Set up the rest of the attachment information. 163 */ 164 ta.ta_memt = tba->tba_memt; 165 ta.ta_dmat = (*sc->sc_get_dma_tag)(i); 166 ta.ta_slot = i; 167 ta.ta_offset = 0; 168 ta.ta_addr = tcaddr; 169 ta.ta_cookie = slot->tcs_cookie; 170 171 /* 172 * Mark the slot as used. 173 */ 174 slot->tcs_used = 1; 175 176 /* 177 * Attach the device. 178 */ 179 config_found_sm(self, &ta, tcprint, tcsubmatch); 180 } 181 } 182 183 int 184 tcprint(aux, pnp) 185 void *aux; 186 const char *pnp; 187 { 188 struct tc_attach_args *ta = aux; 189 char devinfo[256]; 190 191 if (pnp) { 192 tc_devinfo(ta->ta_modname, devinfo, sizeof devinfo); 193 printf("%s at %s", devinfo, pnp); 194 } 195 printf(" slot %d offset 0x%lx", ta->ta_slot, 196 (long)ta->ta_offset); 197 return (UNCONF); 198 } 199 200 int 201 tcsubmatch(parent, vcf, aux) 202 struct device *parent; 203 void *vcf, *aux; 204 { 205 struct tc_attach_args *d = aux; 206 struct cfdata *cf = vcf; 207 208 if ((cf->tccf_slot != TCCF_SLOT_UNKNOWN) && 209 (cf->tccf_slot != d->ta_slot)) 210 return 0; 211 if ((cf->tccf_offset != TCCF_SLOT_UNKNOWN) && 212 (cf->tccf_offset != d->ta_offset)) 213 return 0; 214 215 return ((*cf->cf_attach->ca_match)(parent, cf, aux)); 216 } 217 218 219 #define NTC_ROMOFFS 2 220 static tc_offset_t tc_slot_romoffs[NTC_ROMOFFS] = { 221 TC_SLOT_ROM, 222 TC_SLOT_PROTOROM, 223 }; 224 225 int 226 tc_checkslot(slotbase, namep) 227 tc_addr_t slotbase; 228 char *namep; 229 { 230 struct tc_rommap *romp; 231 int i, j; 232 233 for (i = 0; i < NTC_ROMOFFS; i++) { 234 romp = (struct tc_rommap *) 235 (slotbase + tc_slot_romoffs[i]); 236 237 switch (romp->tcr_width.v) { 238 case 1: 239 case 2: 240 case 4: 241 break; 242 243 default: 244 continue; 245 } 246 247 if (romp->tcr_stride.v != 4) 248 continue; 249 250 for (j = 0; j < 4; j++) 251 if (romp->tcr_test[j+0*romp->tcr_stride.v] != 0x55 || 252 romp->tcr_test[j+1*romp->tcr_stride.v] != 0x00 || 253 romp->tcr_test[j+2*romp->tcr_stride.v] != 0xaa || 254 romp->tcr_test[j+3*romp->tcr_stride.v] != 0xff) 255 continue; 256 257 for (j = 0; j < TC_ROM_LLEN; j++) 258 namep[j] = romp->tcr_modname[j].v; 259 namep[j] = '\0'; 260 return (1); 261 } 262 return (0); 263 } 264 265 void 266 tc_intr_establish(dev, cookie, level, handler, arg, name) 267 struct device *dev; 268 void *cookie, *arg; 269 int level; 270 int (*handler)(void *); 271 const char *name; 272 { 273 struct tc_softc *sc = tc_cd.cd_devs[0]; 274 275 (*sc->sc_intr_establish)(dev, cookie, level, handler, arg, name); 276 } 277 278 void 279 tc_intr_disestablish(dev, cookie, name) 280 struct device *dev; 281 void *cookie; 282 const char *name; 283 { 284 struct tc_softc *sc = tc_cd.cd_devs[0]; 285 286 (*sc->sc_intr_disestablish)(dev, cookie, name); 287 } 288 289 #ifdef TCVERBOSE 290 /* 291 * Descriptions of known devices. 292 */ 293 struct tc_knowndev { 294 const char *id, *description; 295 }; 296 297 #include <dev/tc/tcdevs_data.h> 298 #endif /* TCVERBOSE */ 299 300 void 301 tc_devinfo(const char *id, char *cp, size_t cp_len) 302 { 303 #ifdef TCVERBOSE 304 struct tc_knowndev *tdp; 305 const char *description; 306 307 /* find the device in the table, if possible. */ 308 description = NULL; 309 for (tdp = tc_knowndevs; tdp->id != NULL; tdp++) { 310 /* check this entry for a match */ 311 if (strcmp(tdp->id, id) == 0) { 312 description = tdp->description; 313 break; 314 } 315 } 316 if (description != NULL) 317 snprintf(cp, cp_len, "\"%s\" (%s)", id, description); 318 else 319 #endif 320 snprintf(cp, cp_len, "\"%s\"", id); 321 } 322