1 /* $NetBSD: frodo.c,v 1.10 2002/03/17 05:44:48 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 #include <sys/cdefs.h> 70 __KERNEL_RCSID(0, "$NetBSD: frodo.c,v 1.10 2002/03/17 05:44:48 gmcgarry Exp $"); 71 72 #define _HP300_INTR_H_PRIVATE 73 74 #include <sys/param.h> 75 #include <sys/systm.h> 76 #include <sys/kernel.h> 77 #include <sys/syslog.h> 78 #include <sys/device.h> 79 80 #include <machine/cpu.h> 81 #include <machine/intr.h> 82 #include <machine/hp300spu.h> 83 84 #include <hp300/dev/intiovar.h> 85 86 #include <hp300/dev/frodoreg.h> 87 #include <hp300/dev/frodovar.h> 88 89 /* 90 * Description of a Frodo interrupt handler. 91 */ 92 struct frodo_interhand { 93 int (*ih_fn) __P((void *)); 94 void *ih_arg; 95 int ih_priority; 96 }; 97 98 struct frodo_softc { 99 struct device sc_dev; /* generic device glue */ 100 volatile u_int8_t *sc_regs; /* register base */ 101 struct frodo_interhand sc_intr[FRODO_NINTR]; /* interrupt handlers */ 102 int sc_ipl; 103 void *sc_ih; /* out interrupt cookie */ 104 int sc_refcnt; /* number of interrupt refs */ 105 }; 106 107 int frodomatch __P((struct device *, struct cfdata *, void *)); 108 void frodoattach __P((struct device *, struct device *, void *)); 109 110 int frodoprint __P((void *, const char *)); 111 int frodosubmatch __P((struct device *, struct cfdata *, void *)); 112 113 int frodointr __P((void *)); 114 115 void frodo_imask __P((struct frodo_softc *, u_int16_t, u_int16_t)); 116 117 struct cfattach frodo_ca = { 118 sizeof(struct frodo_softc), frodomatch, frodoattach 119 }; 120 121 struct frodo_attach_args frodo_subdevs[] = { 122 { "dnkbd", FRODO_APCI_OFFSET(0), FRODO_INTR_APCI0 }, 123 { "apci", FRODO_APCI_OFFSET(1), FRODO_INTR_APCI1 }, 124 { "apci", FRODO_APCI_OFFSET(2), FRODO_INTR_APCI2 }, 125 { "apci", FRODO_APCI_OFFSET(3), FRODO_INTR_APCI3 }, 126 { NULL, 0, 0 }, 127 }; 128 129 int 130 frodomatch(parent, match, aux) 131 struct device *parent; 132 struct cfdata *match; 133 void *aux; 134 { 135 struct intio_attach_args *ia = aux; 136 static int frodo_matched = 0; 137 138 /* only allow one instance */ 139 if (frodo_matched) 140 return (0); 141 142 if (strcmp(ia->ia_modname, "frodo") != 0) 143 return (0); 144 145 if (badaddr((caddr_t)ia->ia_addr)) 146 return (0); 147 148 frodo_matched = 1; 149 return (1); 150 } 151 152 void 153 frodoattach(parent, self, aux) 154 struct device *parent, *self; 155 void *aux; 156 { 157 struct frodo_softc *sc = (struct frodo_softc *)self; 158 struct intio_attach_args *ia = aux; 159 int i; 160 161 sc->sc_regs = (volatile u_int8_t *)ia->ia_addr; 162 sc->sc_ipl = ia->ia_ipl; 163 164 if ((FRODO_READ(sc, FRODO_IISR) & FRODO_IISR_SERVICE) == 0) 165 printf(": service mode enabled"); 166 printf("\n"); 167 168 /* Clear all of the interrupt handlers. */ 169 memset(sc->sc_intr, 0, sizeof(sc->sc_intr)); 170 sc->sc_refcnt = 0; 171 172 /* 173 * Disable all of the interrupt lines; we reenable them 174 * as subdevices attach. 175 */ 176 frodo_imask(sc, 0, 0xffff); 177 178 /* Clear any pending interrupts. */ 179 FRODO_WRITE(sc, FRODO_PIC_PU, 0xff); 180 FRODO_WRITE(sc, FRODO_PIC_PL, 0xff); 181 182 /* Set interrupt polarities. */ 183 FRODO_WRITE(sc, FRODO_PIO_IPR, 0x10); 184 185 /* ...and configure for edge triggering. */ 186 FRODO_WRITE(sc, FRODO_PIO_IELR, 0xcf); 187 188 /* 189 * We defer hooking up our interrupt handler until 190 * a subdevice hooks up theirs. 191 */ 192 sc->sc_ih = NULL; 193 194 /* ... and attach subdevices. */ 195 for (i = 0; frodo_subdevs[i].fa_name != NULL; i++) { 196 /* 197 * Skip the first serial port if we're not a 425e; 198 * it's mapped to the DCA at select code 9 on all 199 * other models. 200 */ 201 if (frodo_subdevs[i].fa_offset == FRODO_APCI_OFFSET(1) && 202 mmuid != MMUID_425_E) 203 continue; 204 config_found_sm(self, &frodo_subdevs[i], 205 frodoprint, frodosubmatch); 206 } 207 } 208 209 int 210 frodosubmatch(parent, cf, aux) 211 struct device *parent; 212 struct cfdata *cf; 213 void *aux; 214 { 215 struct frodo_attach_args *fa = aux; 216 217 if (cf->frodocf_offset != FRODO_UNKNOWN_OFFSET && 218 cf->frodocf_offset != fa->fa_offset) 219 return (0); 220 221 return ((*cf->cf_attach->ca_match)(parent, cf, aux)); 222 } 223 224 int 225 frodoprint(aux, pnp) 226 void *aux; 227 const char *pnp; 228 { 229 struct frodo_attach_args *fa = aux; 230 231 if (pnp) 232 printf("%s at %s", fa->fa_name, pnp); 233 printf(" offset 0x%x", fa->fa_offset); 234 return (UNCONF); 235 } 236 237 void 238 frodo_intr_establish(frdev, func, arg, line, priority) 239 struct device *frdev; 240 int (*func) __P((void *)); 241 void *arg; 242 int line; 243 int priority; 244 { 245 struct frodo_softc *sc = (struct frodo_softc *)frdev; 246 struct hp300_intrhand *ih = sc->sc_ih; 247 248 if (line < 0 || line >= FRODO_NINTR) { 249 printf("%s: bad interrupt line %d\n", 250 sc->sc_dev.dv_xname, line); 251 goto lose; 252 } 253 if (sc->sc_intr[line].ih_fn != NULL) { 254 printf("%s: interrupt line %d already used\n", 255 sc->sc_dev.dv_xname, line); 256 goto lose; 257 } 258 259 /* Install the handler. */ 260 sc->sc_intr[line].ih_fn = func; 261 sc->sc_intr[line].ih_arg = arg; 262 sc->sc_intr[line].ih_priority = priority; 263 264 /* 265 * If this is the first one, establish the frodo 266 * interrupt handler. If not, reestablish at a 267 * higher priority if necessary. 268 */ 269 if (ih == NULL || ih->ih_priority < priority) { 270 if (ih != NULL) 271 intr_disestablish(ih); 272 sc->sc_ih = intr_establish(frodointr, sc, sc->sc_ipl, priority); 273 } 274 275 sc->sc_refcnt++; 276 277 /* Enable the interrupt line. */ 278 frodo_imask(sc, (1 << line), 0); 279 return; 280 lose: 281 panic("frodo_intr_establish"); 282 } 283 284 void 285 frodo_intr_disestablish(frdev, line) 286 struct device *frdev; 287 int line; 288 { 289 struct frodo_softc *sc = (struct frodo_softc *)frdev; 290 struct hp300_intrhand *ih = sc->sc_ih; 291 int newpri; 292 293 if (sc->sc_intr[line].ih_fn == NULL) { 294 printf("%s: no handler for line %d\n", 295 sc->sc_dev.dv_xname, line); 296 panic("frodo_intr_disestablish"); 297 } 298 299 sc->sc_intr[line].ih_fn = NULL; 300 frodo_imask(sc, 0, (1 << line)); 301 302 /* If this was the last, unhook ourselves. */ 303 if (sc->sc_refcnt-- == 1) { 304 intr_disestablish(ih); 305 return; 306 } 307 308 /* Lower our priority, if appropriate. */ 309 for (newpri = 0, line = 0; line < FRODO_NINTR; line++) 310 if (sc->sc_intr[line].ih_fn != NULL && 311 sc->sc_intr[line].ih_priority > newpri) 312 newpri = sc->sc_intr[line].ih_priority; 313 314 if (newpri != ih->ih_priority) { 315 intr_disestablish(ih); 316 sc->sc_ih = intr_establish(frodointr, sc, sc->sc_ipl, newpri); 317 } 318 } 319 320 int 321 frodointr(arg) 322 void *arg; 323 { 324 struct frodo_softc *sc = arg; 325 struct frodo_interhand *fih; 326 int line, taken = 0; 327 328 /* Any interrupts pending? */ 329 if (FRODO_GETPEND(sc) == 0) 330 return (0); 331 332 do { 333 /* 334 * Get pending interrupt; this also clears it for us. 335 */ 336 line = FRODO_IPEND(sc); 337 fih = &sc->sc_intr[line]; 338 if (fih->ih_fn == NULL || 339 (*fih->ih_fn)(fih->ih_arg) == 0) 340 printf("%s: spurious interrupt on line %d\n", 341 sc->sc_dev.dv_xname, line); 342 if (taken++ > 100) 343 panic("frodointr: looping!"); 344 } while (FRODO_GETPEND(sc) != 0); 345 346 return (1); 347 } 348 349 void 350 frodo_imask(sc, set, clear) 351 struct frodo_softc *sc; 352 u_int16_t set, clear; 353 { 354 u_int16_t imask; 355 356 imask = FRODO_GETMASK(sc); 357 358 imask |= set; 359 imask &= ~clear; 360 361 FRODO_SETMASK(sc, imask); 362 } 363