frodo.c revision 1.8
1 /* $NetBSD: frodo.c,v 1.8 2001/12/08 04:22:46 gmcgarry Exp $ */ 2 3 /*- 4 * Copyright (c) 1997, 1998, 1999 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. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the NetBSD 21 * Foundation, Inc. and its contributors. 22 * 4. Neither the name of The NetBSD Foundation nor the names of its 23 * contributors may be used to endorse or promote products derived 24 * from this software without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 * POSSIBILITY OF SUCH DAMAGE. 37 */ 38 39 /* 40 * Copyright (c) 1997 Michael Smith. All rights reserved. 41 * 42 * Redistribution and use in source and binary forms, with or without 43 * modification, are permitted provided that the following conditions 44 * are met: 45 * 1. Redistributions of source code must retain the above copyright 46 * notice, this list of conditions and the following disclaimer. 47 * 2. Redistributions in binary form must reproduce the above copyright 48 * notice, this list of conditions and the following disclaimer in the 49 * documentation and/or other materials provided with the distribution. 50 * 51 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 52 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 53 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 54 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 55 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 56 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 57 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 58 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 59 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 60 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 61 * SUCH DAMAGE. 62 */ 63 64 /* 65 * Support for the "Frodo" (a.k.a. "Apollo Utility") chip found 66 * in HP Apollo 9000/4xx workstations. 67 */ 68 69 #define _HP300_INTR_H_PRIVATE 70 71 #include <sys/param.h> 72 #include <sys/systm.h> 73 #include <sys/kernel.h> 74 #include <sys/syslog.h> 75 #include <sys/device.h> 76 77 #include <machine/cpu.h> 78 #include <machine/intr.h> 79 #include <machine/hp300spu.h> 80 81 #include <hp300/dev/intiovar.h> 82 83 #include <hp300/dev/frodoreg.h> 84 #include <hp300/dev/frodovar.h> 85 86 /* 87 * Description of a Frodo interrupt handler. 88 */ 89 struct frodo_interhand { 90 int (*ih_fn) __P((void *)); 91 void *ih_arg; 92 int ih_priority; 93 }; 94 95 struct frodo_softc { 96 struct device sc_dev; /* generic device glue */ 97 volatile u_int8_t *sc_regs; /* register base */ 98 struct frodo_interhand sc_intr[FRODO_NINTR]; /* interrupt handlers */ 99 int sc_ipl; 100 void *sc_ih; /* out interrupt cookie */ 101 int sc_refcnt; /* number of interrupt refs */ 102 }; 103 104 int frodomatch __P((struct device *, struct cfdata *, void *)); 105 void frodoattach __P((struct device *, struct device *, void *)); 106 107 int frodoprint __P((void *, const char *)); 108 int frodosubmatch __P((struct device *, struct cfdata *, void *)); 109 110 int frodointr __P((void *)); 111 112 void frodo_imask __P((struct frodo_softc *, u_int16_t, u_int16_t)); 113 114 struct cfattach frodo_ca = { 115 sizeof(struct frodo_softc), frodomatch, frodoattach 116 }; 117 118 struct frodo_attach_args frodo_subdevs[] = { 119 { "dnkbd", FRODO_APCI_OFFSET(0), FRODO_INTR_APCI0 }, 120 { "apci", FRODO_APCI_OFFSET(1), FRODO_INTR_APCI1 }, 121 { "apci", FRODO_APCI_OFFSET(2), FRODO_INTR_APCI2 }, 122 { "apci", FRODO_APCI_OFFSET(3), FRODO_INTR_APCI3 }, 123 { NULL, 0, 0 }, 124 }; 125 126 int 127 frodomatch(parent, match, aux) 128 struct device *parent; 129 struct cfdata *match; 130 void *aux; 131 { 132 struct intio_attach_args *ia = aux; 133 static int frodo_matched = 0; 134 135 /* only allow one instance */ 136 if (frodo_matched) 137 return (0); 138 139 if (strcmp(ia->ia_modname, "frodo ") != 0) 140 return (0); 141 142 if (badaddr((caddr_t)ia->ia_addr)) 143 return (0); 144 145 frodo_matched = 1; 146 return (1); 147 } 148 149 void 150 frodoattach(parent, self, aux) 151 struct device *parent, *self; 152 void *aux; 153 { 154 struct frodo_softc *sc = (struct frodo_softc *)self; 155 struct intio_attach_args *ia = aux; 156 int i; 157 158 sc->sc_regs = (volatile u_int8_t *)ia->ia_addr; 159 sc->sc_ipl = ia->ia_ipl; 160 161 if ((FRODO_READ(sc, FRODO_IISR) & FRODO_IISR_SERVICE) == 0) 162 printf(": service mode enabled"); 163 printf("\n"); 164 165 /* Clear all of the interrupt handlers. */ 166 memset(sc->sc_intr, 0, sizeof(sc->sc_intr)); 167 sc->sc_refcnt = 0; 168 169 /* 170 * Disable all of the interrupt lines; we reenable them 171 * as subdevices attach. 172 */ 173 frodo_imask(sc, 0, 0xffff); 174 175 /* Clear any pending interrupts. */ 176 FRODO_WRITE(sc, FRODO_PIC_PU, 0xff); 177 FRODO_WRITE(sc, FRODO_PIC_PL, 0xff); 178 179 /* Set interrupt polarities. */ 180 FRODO_WRITE(sc, FRODO_PIO_IPR, 0x10); 181 182 /* ...and configure for edge triggering. */ 183 FRODO_WRITE(sc, FRODO_PIO_IELR, 0xcf); 184 185 /* 186 * We defer hooking up our interrupt handler until 187 * a subdevice hooks up theirs. 188 */ 189 sc->sc_ih = NULL; 190 191 /* ... and attach subdevices. */ 192 for (i = 0; frodo_subdevs[i].fa_name != NULL; i++) { 193 /* 194 * Skip the first serial port if we're not a 425e; 195 * it's mapped to the DCA at select code 9 on all 196 * other models. 197 */ 198 if (frodo_subdevs[i].fa_offset == FRODO_APCI_OFFSET(1) && 199 mmuid != MMUID_425_E) 200 continue; 201 config_found_sm(self, &frodo_subdevs[i], 202 frodoprint, frodosubmatch); 203 } 204 } 205 206 int 207 frodosubmatch(parent, cf, aux) 208 struct device *parent; 209 struct cfdata *cf; 210 void *aux; 211 { 212 struct frodo_attach_args *fa = aux; 213 214 if (cf->frodocf_offset != FRODO_UNKNOWN_OFFSET && 215 cf->frodocf_offset != fa->fa_offset) 216 return (0); 217 218 return ((*cf->cf_attach->ca_match)(parent, cf, aux)); 219 } 220 221 int 222 frodoprint(aux, pnp) 223 void *aux; 224 const char *pnp; 225 { 226 struct frodo_attach_args *fa = aux; 227 228 if (pnp) 229 printf("%s at %s", fa->fa_name, pnp); 230 printf(" offset 0x%x", fa->fa_offset); 231 return (UNCONF); 232 } 233 234 void 235 frodo_intr_establish(frdev, func, arg, line, priority) 236 struct device *frdev; 237 int (*func) __P((void *)); 238 void *arg; 239 int line; 240 int priority; 241 { 242 struct frodo_softc *sc = (struct frodo_softc *)frdev; 243 struct hp300_intrhand *ih = sc->sc_ih; 244 245 if (line < 0 || line >= FRODO_NINTR) { 246 printf("%s: bad interrupt line %d\n", 247 sc->sc_dev.dv_xname, line); 248 goto lose; 249 } 250 if (sc->sc_intr[line].ih_fn != NULL) { 251 printf("%s: interrupt line %d already used\n", 252 sc->sc_dev.dv_xname, line); 253 goto lose; 254 } 255 256 /* Install the handler. */ 257 sc->sc_intr[line].ih_fn = func; 258 sc->sc_intr[line].ih_arg = arg; 259 sc->sc_intr[line].ih_priority = priority; 260 261 /* 262 * If this is the first one, establish the frodo 263 * interrupt handler. If not, reestablish at a 264 * higher priority if necessary. 265 */ 266 if (ih == NULL || ih->ih_priority < priority) { 267 if (ih != NULL) 268 intr_disestablish(ih); 269 sc->sc_ih = intr_establish(frodointr, sc, sc->sc_ipl, priority); 270 } 271 272 sc->sc_refcnt++; 273 274 /* Enable the interrupt line. */ 275 frodo_imask(sc, (1 << line), 0); 276 return; 277 lose: 278 panic("frodo_intr_establish"); 279 } 280 281 void 282 frodo_intr_disestablish(frdev, line) 283 struct device *frdev; 284 int line; 285 { 286 struct frodo_softc *sc = (struct frodo_softc *)frdev; 287 struct hp300_intrhand *ih = sc->sc_ih; 288 int newpri; 289 290 if (sc->sc_intr[line].ih_fn == NULL) { 291 printf("%s: no handler for line %d\n", 292 sc->sc_dev.dv_xname, line); 293 panic("frodo_intr_disestablish"); 294 } 295 296 sc->sc_intr[line].ih_fn = NULL; 297 frodo_imask(sc, 0, (1 << line)); 298 299 /* If this was the last, unhook ourselves. */ 300 if (sc->sc_refcnt-- == 1) { 301 intr_disestablish(ih); 302 return; 303 } 304 305 /* Lower our priority, if appropriate. */ 306 for (newpri = 0, line = 0; line < FRODO_NINTR; line++) 307 if (sc->sc_intr[line].ih_fn != NULL && 308 sc->sc_intr[line].ih_priority > newpri) 309 newpri = sc->sc_intr[line].ih_priority; 310 311 if (newpri != ih->ih_priority) { 312 intr_disestablish(ih); 313 sc->sc_ih = intr_establish(frodointr, sc, sc->sc_ipl, newpri); 314 } 315 } 316 317 int 318 frodointr(arg) 319 void *arg; 320 { 321 struct frodo_softc *sc = arg; 322 struct frodo_interhand *fih; 323 int line, taken = 0; 324 325 /* Any interrupts pending? */ 326 if (FRODO_GETPEND(sc) == 0) 327 return (0); 328 329 do { 330 /* 331 * Get pending interrupt; this also clears it for us. 332 */ 333 line = FRODO_IPEND(sc); 334 fih = &sc->sc_intr[line]; 335 if (fih->ih_fn == NULL || 336 (*fih->ih_fn)(fih->ih_arg) == 0) 337 printf("%s: spurious interrupt on line %d\n", 338 sc->sc_dev.dv_xname, line); 339 if (taken++ > 100) 340 panic("frodointr: looping!"); 341 } while (FRODO_GETPEND(sc) != 0); 342 343 return (1); 344 } 345 346 void 347 frodo_imask(sc, set, clear) 348 struct frodo_softc *sc; 349 u_int16_t set, clear; 350 { 351 u_int16_t imask; 352 353 imask = FRODO_GETMASK(sc); 354 355 imask |= set; 356 imask &= ~clear; 357 358 FRODO_SETMASK(sc, imask); 359 } 360
Indexes created Fri Oct 03 02:09:57 GMT 2025