frodo.c revision 1.4
1 /* $NetBSD: frodo.c,v 1.4 1998/01/12 18:30:52 thorpej Exp $ */ 2 3 /*- 4 * Copyright (c) 1997, 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. 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_isr { 90 int (*isr_func) __P((void *)); 91 void *isr_arg; 92 int isr_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_isr sc_intr[FRODO_NINTR]; /* interrupt handlers */ 99 void *sc_ih; /* out interrupt cookie */ 100 int sc_refcnt; /* number of interrupt refs */ 101 }; 102 103 int frodomatch __P((struct device *, struct cfdata *, void *)); 104 void frodoattach __P((struct device *, struct device *, void *)); 105 106 int frodoprint __P((void *, const char *)); 107 int frodosubmatch __P((struct device *, struct cfdata *, void *)); 108 109 int frodointr __P((void *)); 110 111 void frodo_imask __P((struct frodo_softc *, u_int16_t, u_int16_t)); 112 113 struct cfattach frodo_ca = { 114 sizeof(struct frodo_softc), frodomatch, frodoattach 115 }; 116 117 struct frodo_attach_args frodo_subdevs[] = { 118 { "dnkbd", FRODO_APCI_OFFSET(0), FRODO_INTR_APCI0 }, 119 { "apci", FRODO_APCI_OFFSET(1), FRODO_INTR_APCI1 }, 120 { "apci", FRODO_APCI_OFFSET(2), FRODO_INTR_APCI2 }, 121 { "apci", FRODO_APCI_OFFSET(3), FRODO_INTR_APCI3 }, 122 { NULL, 0, 0 }, 123 }; 124 125 int 126 frodomatch(parent, match, aux) 127 struct device *parent; 128 struct cfdata *match; 129 void *aux; 130 { 131 struct intio_attach_args *ia = aux; 132 caddr_t va; 133 static int frodo_matched = 0; 134 135 /* only allow one instance */ 136 if (frodo_matched) 137 return (0); 138 139 /* only 4xx workstations can have this */ 140 switch (machineid) { 141 case HP_400: 142 case HP_425: 143 case HP_433: 144 break; 145 146 default: 147 return (0); 148 } 149 150 /* make sure the hardware is there in any case */ 151 va = (caddr_t)IIOV(FRODO_BASE); 152 if (badaddr(va)) 153 return (0); 154 155 frodo_matched = 1; 156 ia->ia_addr = FRODO_BASE; 157 return (1); 158 } 159 160 void 161 frodoattach(parent, self, aux) 162 struct device *parent, *self; 163 void *aux; 164 { 165 struct frodo_softc *sc = (struct frodo_softc *)self; 166 struct intio_attach_args *ia = aux; 167 int i; 168 169 sc->sc_regs = (volatile u_int8_t *)IIOV(ia->ia_addr); 170 171 if ((FRODO_READ(sc, FRODO_IISR) & FRODO_IISR_SERVICE) == 0) 172 printf(": service mode enabled"); 173 printf("\n"); 174 175 /* Clear all of the interrupt handlers. */ 176 bzero(sc->sc_intr, sizeof(sc->sc_intr)); 177 sc->sc_refcnt = 0; 178 179 /* 180 * Disable all of the interrupt lines; we reenable them 181 * as subdevices attach. 182 */ 183 frodo_imask(sc, 0, 0xffff); 184 185 /* Clear any pending interrupts. */ 186 FRODO_WRITE(sc, FRODO_PIC_PU, 0xff); 187 FRODO_WRITE(sc, FRODO_PIC_PL, 0xff); 188 189 /* Set interrupt polarities. */ 190 FRODO_WRITE(sc, FRODO_PIO_IPR, 0x10); 191 192 /* ...and configure for edge triggering. */ 193 FRODO_WRITE(sc, FRODO_PIO_IELR, 0xcf); 194 195 /* 196 * We defer hooking up our interrupt handler until 197 * a subdevice hooks up theirs. 198 */ 199 sc->sc_ih = NULL; 200 201 /* ... and attach subdevices. */ 202 for (i = 0; frodo_subdevs[i].fa_name != NULL; i++) 203 config_found_sm(self, &frodo_subdevs[i], 204 frodoprint, frodosubmatch); 205 } 206 207 int 208 frodosubmatch(parent, cf, aux) 209 struct device *parent; 210 struct cfdata *cf; 211 void *aux; 212 { 213 struct frodo_attach_args *fa = aux; 214 215 if (cf->frodocf_offset != FRODO_UNKNOWN_OFFSET && 216 cf->frodocf_offset != fa->fa_offset) 217 return (0); 218 219 return ((*cf->cf_attach->ca_match)(parent, cf, aux)); 220 } 221 222 int 223 frodoprint(aux, pnp) 224 void *aux; 225 const char *pnp; 226 { 227 struct frodo_attach_args *fa = aux; 228 229 if (pnp) 230 printf("%s at %s", fa->fa_name, pnp); 231 printf(" offset 0x%x", fa->fa_offset); 232 return (UNCONF); 233 } 234 235 void 236 frodo_intr_establish(frdev, func, arg, line, priority) 237 struct device *frdev; 238 int (*func) __P((void *)); 239 void *arg; 240 int line; 241 int priority; 242 { 243 struct frodo_softc *sc = (struct frodo_softc *)frdev; 244 struct isr *isr = sc->sc_ih; 245 246 if (line < 0 || line >= FRODO_NINTR) { 247 printf("%s: bad interrupt line %d\n", 248 sc->sc_dev.dv_xname, line); 249 goto lose; 250 } 251 if (sc->sc_intr[line].isr_func != NULL) { 252 printf("%s: interrupt line %d already used\n", 253 sc->sc_dev.dv_xname, line); 254 goto lose; 255 } 256 257 /* Install the handler. */ 258 sc->sc_intr[line].isr_func = func; 259 sc->sc_intr[line].isr_arg = arg; 260 sc->sc_intr[line].isr_priority = priority; 261 262 /* 263 * If this is the first one, establish the frodo 264 * interrupt handler. If not, reestablish at a 265 * higher priority if necessary. 266 */ 267 if (isr == NULL || isr->isr_priority < priority) { 268 if (isr != NULL) 269 intr_disestablish(isr); 270 sc->sc_ih = intr_establish(frodointr, sc, 5, priority); 271 } 272 273 sc->sc_refcnt++; 274 275 /* Enable the interrupt line. */ 276 frodo_imask(sc, (1 << line), 0); 277 return; 278 lose: 279 panic("frodo_intr_establish"); 280 } 281 282 void 283 frodo_intr_disestablish(frdev, line) 284 struct device *frdev; 285 int line; 286 { 287 struct frodo_softc *sc = (struct frodo_softc *)frdev; 288 struct isr *isr = sc->sc_ih; 289 int newpri; 290 291 if (sc->sc_intr[line].isr_func == NULL) { 292 printf("%s: no handler for line %d\n", 293 sc->sc_dev.dv_xname, line); 294 panic("frodo_intr_disestablish"); 295 } 296 297 sc->sc_intr[line].isr_func = NULL; 298 frodo_imask(sc, 0, (1 << line)); 299 300 /* If this was the last, unhook ourselves. */ 301 if (sc->sc_refcnt-- == 1) { 302 intr_disestablish(isr); 303 return; 304 } 305 306 /* Lower our priority, if appropriate. */ 307 for (newpri = 0, line = 0; line < FRODO_NINTR; line++) 308 if (sc->sc_intr[line].isr_func != NULL && 309 sc->sc_intr[line].isr_priority > newpri) 310 newpri = sc->sc_intr[line].isr_priority; 311 312 if (newpri != isr->isr_priority) { 313 intr_disestablish(isr); 314 sc->sc_ih = intr_establish(frodointr, sc, 5, newpri); 315 } 316 } 317 318 int 319 frodointr(arg) 320 void *arg; 321 { 322 struct frodo_softc *sc = arg; 323 struct frodo_isr *fisr; 324 int line, taken = 0; 325 326 /* Any interrupts pending? */ 327 if (FRODO_GETPEND(sc) == 0) 328 return (0); 329 330 do { 331 /* 332 * Get pending interrupt; this also clears it for us. 333 */ 334 line = FRODO_IPEND(sc); 335 fisr = &sc->sc_intr[line]; 336 if (fisr->isr_func == NULL || 337 (*fisr->isr_func)(fisr->isr_arg) == 0) 338 printf("%s: spurious interrupt on line %d\n", 339 sc->sc_dev.dv_xname, line); 340 if (taken++ > 100) 341 panic("frodointr: looping!"); 342 } while (FRODO_GETPEND(sc) != 0); 343 344 return (1); 345 } 346 347 void 348 frodo_imask(sc, set, clear) 349 struct frodo_softc *sc; 350 u_int16_t set, clear; 351 { 352 u_int16_t imask; 353 354 imask = FRODO_GETMASK(sc); 355 356 imask |= set; 357 imask &= ~clear; 358 359 FRODO_SETMASK(sc, imask); 360 } 361
Indexes created Fri Oct 03 02:09:57 GMT 2025