1 /* $NetBSD: dio.c,v 1.10 1997/10/09 09:06:49 jtc Exp $ */ 2 3 /*- 4 * Copyright (c) 1996, 1997 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 * Autoconfiguration and mapping support for the DIO bus. 41 */ 42 43 #define _HP300_INTR_H_PRIVATE 44 45 #include <sys/param.h> 46 #include <sys/systm.h> 47 #include <sys/kernel.h> 48 #include <sys/device.h> 49 50 #include <machine/autoconf.h> 51 #include <machine/cpu.h> 52 #include <machine/hp300spu.h> 53 54 #include <hp300/dev/dmavar.h> 55 56 #include <hp300/dev/dioreg.h> 57 #include <hp300/dev/diovar.h> 58 59 #include <hp300/dev/diodevs.h> 60 #include <hp300/dev/diodevs_data.h> 61 62 extern caddr_t internalhpib; 63 64 int dio_scodesize __P((struct dio_attach_args *)); 65 char *dio_devinfo __P((struct dio_attach_args *, char *, size_t)); 66 67 int diomatch __P((struct device *, struct cfdata *, void *)); 68 void dioattach __P((struct device *, struct device *, void *)); 69 int dioprint __P((void *, const char *)); 70 int diosubmatch __P((struct device *, struct cfdata *, void *)); 71 72 struct cfattach dio_ca = { 73 sizeof(struct device), diomatch, dioattach 74 }; 75 76 struct cfdriver dio_cd = { 77 NULL, "dio", DV_DULL 78 }; 79 80 int 81 diomatch(parent, match, aux) 82 struct device *parent; 83 struct cfdata *match; 84 void *aux; 85 { 86 static int dio_matched = 0; 87 88 /* Allow only one instance. */ 89 if (dio_matched) 90 return (0); 91 92 dio_matched = 1; 93 return (1); 94 } 95 96 void 97 dioattach(parent, self, aux) 98 struct device *parent, *self; 99 void *aux; 100 { 101 struct dio_attach_args da; 102 caddr_t pa, va; 103 int scode, scmax, didmap, scodesize; 104 105 scmax = DIO_SCMAX(machineid); 106 printf(": "); 107 dmainit(); 108 109 for (scode = 0; scode < scmax; ) { 110 if (DIO_INHOLE(scode)) { 111 scode++; 112 continue; 113 } 114 115 didmap = 0; 116 117 /* 118 * Temporarily map the space corresponding to 119 * the current select code unless: 120 * - this is the internal hpib select code, 121 * - this is the console select code. 122 */ 123 pa = dio_scodetopa(scode); 124 if (scode == conscode) 125 va = conaddr; 126 else if ((scode == 7) && internalhpib) 127 va = internalhpib = (caddr_t)IIOV(pa); 128 else { 129 va = iomap(pa, NBPG); 130 if (va == NULL) { 131 printf("%s: can't map scode %d\n", 132 self->dv_xname, scode); 133 scode++; 134 continue; 135 } 136 didmap = 1; 137 } 138 139 /* Check for hardware. */ 140 if (badaddr(va)) { 141 if (didmap) 142 iounmap(va, NBPG); 143 scode++; 144 continue; 145 } 146 147 /* Fill out attach args. */ 148 bzero(&da, sizeof(da)); 149 da.da_scode = scode; 150 da.da_id = DIO_ID(va); 151 152 if (DIO_ISFRAMEBUFFER(da.da_id)) 153 da.da_secid = DIO_SECID(va); 154 155 da.da_size = DIO_SIZE(scode, va); 156 scodesize = dio_scodesize(&da); 157 if (DIO_ISDIO(scode)) 158 da.da_size *= scodesize; 159 160 /* No longer need the device to be mapped. */ 161 if (didmap) 162 iounmap(va, NBPG); 163 164 /* Attach matching device. */ 165 config_found_sm(self, &da, dioprint, diosubmatch); 166 scode += scodesize; 167 } 168 } 169 170 int 171 diosubmatch(parent, cf, aux) 172 struct device *parent; 173 struct cfdata *cf; 174 void *aux; 175 { 176 struct dio_attach_args *da = aux; 177 178 if (cf->diocf_scode != DIOCF_SCODE_DEFAULT && 179 cf->diocf_scode != da->da_scode) 180 return (0); 181 182 return ((*cf->cf_attach->ca_match)(parent, cf, aux)); 183 } 184 185 int 186 dioprint(aux, pnp) 187 void *aux; 188 const char *pnp; 189 { 190 struct dio_attach_args *da = aux; 191 char buf[128]; 192 193 if (pnp) 194 printf("%s at %s", dio_devinfo(da, buf, sizeof(buf)), pnp); 195 printf(" scode %d", da->da_scode); 196 return (UNCONF); 197 } 198 199 /* 200 * Convert a select code to a system physical address. 201 */ 202 void * 203 dio_scodetopa(scode) 204 int scode; 205 { 206 u_long rval; 207 208 if (scode == 7 && internalhpib) 209 rval = DIO_IHPIBADDR; 210 else if (DIO_ISDIO(scode)) 211 rval = DIO_BASE + (scode * DIO_DEVSIZE); 212 else if (DIO_ISDIOII(scode)) 213 rval = DIOII_BASE + ((scode - DIOII_SCBASE) * DIOII_DEVSIZE); 214 else 215 rval = 0; 216 217 return ((void *)rval); 218 } 219 220 /* 221 * Return the select code size for this device, defaulting to 1 222 * if we don't know what kind of device we have. 223 */ 224 int 225 dio_scodesize(da) 226 struct dio_attach_args *da; 227 { 228 int i; 229 230 /* 231 * Deal with lame internal HP-IB controllers which don't have 232 * consistent/reliable device ids. 233 */ 234 if (da->da_scode == 7 && internalhpib) 235 return (1); 236 237 /* 238 * Find the dio_devdata matchind the primary id. 239 * If we're a framebuffer, we also check the secondary id. 240 */ 241 for (i = 0; i < DIO_NDEVICES; i++) { 242 if (da->da_id == dio_devdatas[i].dd_id) { 243 if (DIO_ISFRAMEBUFFER(da->da_id)) { 244 if (da->da_secid == dio_devdatas[i].dd_secid) { 245 goto foundit; 246 } 247 } else { 248 foundit: 249 return (dio_devdatas[i].dd_nscode); 250 } 251 } 252 } 253 254 /* 255 * Device is unknown. Print a warning and assume a default. 256 */ 257 printf("WARNING: select code size unknown for id = 0x%x secid = 0x%x\n", 258 da->da_id, da->da_secid); 259 return (1); 260 } 261 262 /* 263 * Return a reasonable description of a DIO device. 264 */ 265 char * 266 dio_devinfo(da, buf, buflen) 267 struct dio_attach_args *da; 268 char *buf; 269 size_t buflen; 270 { 271 #ifdef DIOVERBOSE 272 int i; 273 #endif 274 275 bzero(buf, buflen); 276 277 /* 278 * Deal with lame internal HP-IB controllers which don't have 279 * consistent/reliable device ids. 280 */ 281 if (da->da_scode == 7 && internalhpib) { 282 sprintf(buf, DIO_DEVICE_DESC_IHPIB); 283 return (buf); 284 } 285 286 #ifdef DIOVERBOSE 287 /* 288 * Find the description matching our primary id. 289 * If we're a framebuffer, we also check the secondary id. 290 */ 291 for (i = 0; i < DIO_NDEVICES; i++) { 292 if (da->da_id == dio_devdescs[i].dd_id) { 293 if (DIO_ISFRAMEBUFFER(da->da_id)) { 294 if (da->da_secid == dio_devdescs[i].dd_secid) { 295 goto foundit; 296 } 297 } else { 298 foundit: 299 sprintf(buf, "%s", dio_devdescs[i].dd_desc); 300 return (buf); 301 } 302 } 303 } 304 #endif /* DIOVERBOSE */ 305 306 /* 307 * Device is unknown. Construct something reasonable. 308 */ 309 sprintf(buf, "device id = 0x%x secid = 0x%x", 310 da->da_id, da->da_secid); 311 return (buf); 312 } 313 314 /* 315 * Establish an interrupt handler for a DIO device. 316 */ 317 void * 318 dio_intr_establish(func, arg, ipl, priority) 319 int (*func) __P((void *)); 320 void *arg; 321 int ipl; 322 int priority; 323 { 324 void *ih; 325 326 ih = intr_establish(func, arg, ipl, priority); 327 328 if (priority == IPL_BIO) 329 dmacomputeipl(); 330 331 return (ih); 332 } 333 334 /* 335 * Remove an interrupt handler for a DIO device. 336 */ 337 void 338 dio_intr_disestablish(arg) 339 void *arg; 340 { 341 struct isr *isr = arg; 342 int priority = isr->isr_priority; 343 344 intr_disestablish(arg); 345 346 if (priority == IPL_BIO) 347 dmacomputeipl(); 348 } 349