1 /* $NetBSD: tc.c,v 1.56 2017/06/10 12:03:30 flxd Exp $ */ 2 3 /* 4 * Copyright (c) 1994, 1995 Carnegie-Mellon University. 5 * All rights reserved. 6 * 7 * Author: Chris G. Demetriou 8 * 9 * Permission to use, copy, modify and distribute this software and 10 * its documentation is hereby granted, provided that both the copyright 11 * notice and this permission notice appear in all copies of the 12 * software, derivative works or modified versions, and any portions 13 * thereof, and that both notices appear in supporting documentation. 14 * 15 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" 16 * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND 17 * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. 18 * 19 * Carnegie Mellon requests users of this software to return to 20 * 21 * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU 22 * School of Computer Science 23 * Carnegie Mellon University 24 * Pittsburgh PA 15213-3890 25 * 26 * any improvements or extensions that they make and grant Carnegie the 27 * rights to redistribute these changes. 28 */ 29 30 #include <sys/cdefs.h> 31 __KERNEL_RCSID(0, "$NetBSD: tc.c,v 1.56 2017/06/10 12:03:30 flxd Exp $"); 32 33 #include "opt_tcverbose.h" 34 35 #include <sys/param.h> 36 #include <sys/systm.h> 37 #include <sys/device.h> 38 39 #include <machine/cpu.h> /* for badaddr */ 40 41 #include <dev/tc/tcreg.h> 42 #include <dev/tc/tcvar.h> 43 #include <dev/tc/tcdevs.h> 44 45 #include "locators.h" 46 47 /* Definition of the driver for autoconfig. */ 48 static int tcmatch(device_t, cfdata_t, void *); 49 50 CFATTACH_DECL_NEW(tc, sizeof(struct tc_softc), 51 tcmatch, tcattach, NULL, NULL); 52 53 extern struct cfdriver tc_cd; 54 55 static int tcprint(void *, const char *); 56 static void tc_devinfo(const char *, char *, size_t); 57 58 static int 59 tcmatch(device_t parent, cfdata_t cf, void *aux) 60 { 61 struct tcbus_attach_args *tba = aux; 62 63 if (strcmp(tba->tba_busname, cf->cf_name)) 64 return (0); 65 66 return (1); 67 } 68 69 void 70 tcattach(device_t parent, device_t self, void *aux) 71 { 72 struct tc_softc *sc = device_private(self); 73 struct tcbus_attach_args *tba = aux; 74 struct tc_attach_args ta; 75 const struct tc_builtin *builtin; 76 struct tc_slotdesc *slot; 77 tc_addr_t tcaddr; 78 int i; 79 int locs[TCCF_NLOCS]; 80 81 sc->sc_dev = self; 82 83 printf(": %s MHz clock\n", 84 tba->tba_speed == TC_SPEED_25_MHZ ? "25" : "12.5"); 85 86 /* 87 * Save important CPU/chipset information. 88 */ 89 sc->sc_speed = tba->tba_speed; 90 sc->sc_nslots = tba->tba_nslots; 91 sc->sc_slots = tba->tba_slots; 92 sc->sc_intr_evcnt = tba->tba_intr_evcnt; 93 sc->sc_intr_establish = tba->tba_intr_establish; 94 sc->sc_intr_disestablish = tba->tba_intr_disestablish; 95 sc->sc_get_dma_tag = tba->tba_get_dma_tag; 96 97 /* 98 * Try to configure each built-in device 99 */ 100 for (i = 0; i < tba->tba_nbuiltins; i++) { 101 builtin = &tba->tba_builtins[i]; 102 103 /* sanity check! */ 104 if (builtin->tcb_slot > sc->sc_nslots) 105 panic("tcattach: builtin %d slot > nslots", i); 106 107 /* 108 * Make sure device is really there, because some 109 * built-in devices are really optional. 110 */ 111 tcaddr = sc->sc_slots[builtin->tcb_slot].tcs_addr + 112 builtin->tcb_offset; 113 if (tc_badaddr(tcaddr)) 114 continue; 115 116 /* 117 * Set up the device attachment information. 118 */ 119 strncpy(ta.ta_modname, builtin->tcb_modname, TC_ROM_LLEN); 120 ta.ta_memt = tba->tba_memt; 121 ta.ta_dmat = (*sc->sc_get_dma_tag)(builtin->tcb_slot); 122 ta.ta_modname[TC_ROM_LLEN] = '\0'; 123 ta.ta_slot = builtin->tcb_slot; 124 ta.ta_offset = builtin->tcb_offset; 125 ta.ta_addr = tcaddr; 126 ta.ta_cookie = builtin->tcb_cookie; 127 ta.ta_busspeed = sc->sc_speed; 128 129 /* 130 * Mark the slot as used, so we don't check it later. 131 */ 132 sc->sc_slots[builtin->tcb_slot].tcs_used = 1; 133 134 locs[TCCF_SLOT] = builtin->tcb_slot; 135 locs[TCCF_OFFSET] = builtin->tcb_offset; 136 /* 137 * Attach the device. 138 */ 139 config_found_sm_loc(self, "tc", locs, &ta, 140 tcprint, config_stdsubmatch); 141 } 142 143 /* 144 * Try to configure each unused slot, last to first. 145 */ 146 for (i = sc->sc_nslots - 1; i >= 0; i--) { 147 slot = &sc->sc_slots[i]; 148 149 /* If already checked above, don't look again now. */ 150 if (slot->tcs_used) 151 continue; 152 153 /* 154 * Make sure something is there, and find out what it is. 155 */ 156 tcaddr = slot->tcs_addr; 157 if (tc_badaddr(tcaddr)) 158 continue; 159 if (tc_checkslot(tcaddr, ta.ta_modname, NULL) == 0) 160 continue; 161 162 /* 163 * Set up the rest of the attachment information. 164 */ 165 ta.ta_memt = tba->tba_memt; 166 ta.ta_dmat = (*sc->sc_get_dma_tag)(i); 167 ta.ta_slot = i; 168 ta.ta_offset = 0; 169 ta.ta_addr = tcaddr; 170 ta.ta_cookie = slot->tcs_cookie; 171 ta.ta_busspeed = sc->sc_speed; 172 173 /* 174 * Mark the slot as used. 175 */ 176 slot->tcs_used = 1; 177 178 locs[TCCF_SLOT] = i; 179 locs[TCCF_OFFSET] = 0; 180 /* 181 * Attach the device. 182 */ 183 config_found_sm_loc(self, "tc", locs, &ta, 184 tcprint, config_stdsubmatch); 185 } 186 } 187 188 static int 189 tcprint(void *aux, const char *pnp) 190 { 191 struct tc_attach_args *ta = aux; 192 char devinfo[256]; 193 194 if (pnp) { 195 tc_devinfo(ta->ta_modname, devinfo, sizeof(devinfo)); 196 aprint_normal("%s at %s", devinfo, pnp); 197 } 198 aprint_normal(" slot %d offset 0x%x", ta->ta_slot, ta->ta_offset); 199 return (UNCONF); 200 } 201 202 203 static const tc_offset_t tc_slot_romoffs[] = { 204 TC_SLOT_ROM, 205 TC_SLOT_PROTOROM, 206 }; 207 208 static int 209 tc_check_romp(const struct tc_rommap *romp) 210 { 211 212 switch (romp->tcr_width.v) { 213 case 1: 214 case 2: 215 case 4: 216 break; 217 218 default: 219 return 0; 220 } 221 222 if (romp->tcr_stride.v != 4) 223 return 0; 224 225 for (size_t j = 0; j < romp->tcr_width.v; j++) { 226 if (romp->tcr_test[j + 0 * romp->tcr_stride.v] != 0x55 || 227 romp->tcr_test[j + 1 * romp->tcr_stride.v] != 0x00 || 228 romp->tcr_test[j + 2 * romp->tcr_stride.v] != 0xaa || 229 romp->tcr_test[j + 3 * romp->tcr_stride.v] != 0xff) 230 return 0; 231 } 232 return 1; 233 } 234 235 int 236 tc_checkslot(tc_addr_t slotbase, char *namep, struct tc_rommap **rompp) 237 { 238 struct tc_rommap *romp; 239 int i, j; 240 241 for (i = 0; i < __arraycount(tc_slot_romoffs); i++) { 242 romp = (struct tc_rommap *) 243 (slotbase + tc_slot_romoffs[i]); 244 245 if (!tc_check_romp(romp)) 246 continue; 247 248 if (namep != NULL) { 249 for (j = 0; j < TC_ROM_LLEN; j++) 250 namep[j] = romp->tcr_modname[j].v; 251 namep[j] = '\0'; 252 } 253 if (rompp != NULL) 254 *rompp = romp; 255 return (1); 256 } 257 return (0); 258 } 259 260 const struct evcnt * 261 tc_intr_evcnt(device_t dev, void *cookie) 262 { 263 struct tc_softc *sc = device_lookup_private(&tc_cd, 0); 264 265 return ((*sc->sc_intr_evcnt)(dev, cookie)); 266 } 267 268 void 269 tc_intr_establish(device_t dev, void *cookie, int level, 270 int (*handler)(void *), void *arg) 271 { 272 struct tc_softc *sc = device_lookup_private(&tc_cd, 0); 273 274 (*sc->sc_intr_establish)(dev, cookie, level, handler, arg); 275 } 276 277 void 278 tc_intr_disestablish(device_t dev, void *cookie) 279 { 280 struct tc_softc *sc = device_lookup_private(&tc_cd, 0); 281 282 (*sc->sc_intr_disestablish)(dev, cookie); 283 } 284 285 #ifdef TCVERBOSE 286 /* 287 * Descriptions of of known devices. 288 */ 289 struct tc_knowndev { 290 const char *id, *driver, *description; 291 }; 292 293 #include <dev/tc/tcdevs_data.h> 294 #endif /* TCVERBOSE */ 295 296 static void 297 tc_devinfo(const char *id, char *cp, size_t l) 298 { 299 const char *driver, *description; 300 #ifdef TCVERBOSE 301 const struct tc_knowndev *tdp; 302 int match; 303 const char *unmatched = "unknown "; 304 #else 305 const char *unmatched = ""; 306 #endif 307 308 driver = NULL; 309 description = id; 310 311 #ifdef TCVERBOSE 312 /* find the device in the table, if possible. */ 313 tdp = tc_knowndevs; 314 while (tdp->id != NULL) { 315 /* check this entry for a match */ 316 match = !strcmp(tdp->id, id); 317 if (match) { 318 driver = tdp->driver; 319 description = tdp->description; 320 break; 321 } 322 tdp++; 323 } 324 #endif 325 326 if (driver == NULL) 327 snprintf(cp, l, "%sdevice %s", unmatched, id); 328 else 329 snprintf(cp, l, "%s (%s)", driver, description); 330 } 331