dio.c revision 1.16
1 /* $NetBSD: dio.c,v 1.16 2002/03/15 05:55:35 gmcgarry Exp $ */ 2 3 /*- 4 * Copyright (c) 1996, 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 * Autoconfiguration and mapping support for the DIO bus. 41 */ 42 43 #include <sys/cdefs.h> 44 __KERNEL_RCSID(0, "$NetBSD: dio.c,v 1.16 2002/03/15 05:55:35 gmcgarry Exp $"); 45 46 #define _HP300_INTR_H_PRIVATE 47 48 #include <sys/param.h> 49 #include <sys/systm.h> 50 #include <sys/kernel.h> 51 #include <sys/device.h> 52 53 #include <machine/autoconf.h> 54 #include <machine/cpu.h> 55 #include <machine/hp300spu.h> 56 57 #include <hp300/dev/dmavar.h> 58 59 #include <hp300/dev/dioreg.h> 60 #include <hp300/dev/diovar.h> 61 62 #include <hp300/dev/diodevs.h> 63 #include <hp300/dev/diodevs_data.h> 64 65 extern caddr_t internalhpib; 66 67 int dio_scodesize __P((struct dio_attach_args *)); 68 char *dio_devinfo __P((struct dio_attach_args *, char *, size_t)); 69 70 int diomatch __P((struct device *, struct cfdata *, void *)); 71 void dioattach __P((struct device *, struct device *, void *)); 72 int dioprint __P((void *, const char *)); 73 int diosubmatch __P((struct device *, struct cfdata *, void *)); 74 75 struct cfattach dio_ca = { 76 sizeof(struct device), diomatch, dioattach 77 }; 78 79 int 80 diomatch(parent, match, aux) 81 struct device *parent; 82 struct cfdata *match; 83 void *aux; 84 { 85 static int dio_matched = 0; 86 87 /* Allow only one instance. */ 88 if (dio_matched) 89 return (0); 90 91 dio_matched = 1; 92 return (1); 93 } 94 95 void 96 dioattach(parent, self, aux) 97 struct device *parent, *self; 98 void *aux; 99 { 100 struct dio_attach_args da; 101 caddr_t pa, va; 102 int scode, scmax, didmap, scodesize; 103 104 scmax = DIO_SCMAX(machineid); 105 printf(": "); 106 dmainit(); 107 108 for (scode = 0; scode < scmax; ) { 109 if (DIO_INHOLE(scode)) { 110 scode++; 111 continue; 112 } 113 114 didmap = 0; 115 116 /* 117 * Temporarily map the space corresponding to 118 * the current select code unless: 119 * - this is the internal hpib select code, 120 */ 121 pa = dio_scodetopa(scode); 122 if ((scode == 7) && internalhpib) 123 va = internalhpib = (caddr_t)IIOV(pa); 124 else { 125 va = iomap(pa, NBPG); 126 if (va == NULL) { 127 printf("%s: can't map scode %d\n", 128 self->dv_xname, scode); 129 scode++; 130 continue; 131 } 132 didmap = 1; 133 } 134 135 /* Check for hardware. */ 136 if (badaddr(va)) { 137 if (didmap) 138 iounmap(va, NBPG); 139 scode++; 140 continue; 141 } 142 143 /* Fill out attach args. */ 144 memset(&da, 0, sizeof(da)); 145 da.da_bst = HP300_BUS_SPACE_DIO; 146 da.da_scode = scode; 147 /* 148 * Internal HP-IB doesn't always return a device ID, 149 * so we rely on the sysflags. 150 */ 151 if ((scode == 7) && internalhpib) 152 da.da_id = DIO_DEVICE_ID_IHPIB; 153 else 154 da.da_id = DIO_ID(va); 155 156 if (DIO_ISFRAMEBUFFER(da.da_id)) 157 da.da_secid = DIO_SECID(va); 158 159 da.da_size = DIO_SIZE(scode, va); 160 scodesize = dio_scodesize(&da); 161 if (DIO_ISDIO(scode)) 162 da.da_size *= scodesize; 163 164 /* No longer need the device to be mapped. */ 165 if (didmap) 166 iounmap(va, NBPG); 167 168 /* Attach matching device. */ 169 config_found_sm(self, &da, dioprint, diosubmatch); 170 scode += scodesize; 171 } 172 } 173 174 int 175 diosubmatch(parent, cf, aux) 176 struct device *parent; 177 struct cfdata *cf; 178 void *aux; 179 { 180 struct dio_attach_args *da = aux; 181 182 if (cf->diocf_scode != DIOCF_SCODE_DEFAULT && 183 cf->diocf_scode != da->da_scode) 184 return (0); 185 186 return ((*cf->cf_attach->ca_match)(parent, cf, aux)); 187 } 188 189 int 190 dioprint(aux, pnp) 191 void *aux; 192 const char *pnp; 193 { 194 struct dio_attach_args *da = aux; 195 char buf[128]; 196 197 if (pnp) 198 printf("%s at %s", dio_devinfo(da, buf, sizeof(buf)), pnp); 199 printf(" scode %d", da->da_scode); 200 return (UNCONF); 201 } 202 203 /* 204 * Convert a select code to a system physical address. 205 */ 206 void * 207 dio_scodetopa(scode) 208 int scode; 209 { 210 u_long rval; 211 212 if (scode == 7 && internalhpib) 213 rval = DIO_IHPIBADDR; 214 else if (DIO_ISDIO(scode)) 215 rval = DIO_BASE + (scode * DIO_DEVSIZE); 216 else if (DIO_ISDIOII(scode)) 217 rval = DIOII_BASE + ((scode - DIOII_SCBASE) * DIOII_DEVSIZE); 218 else 219 rval = 0; 220 221 return ((void *)rval); 222 } 223 224 /* 225 * Return the select code size for this device, defaulting to 1 226 * if we don't know what kind of device we have. 227 */ 228 int 229 dio_scodesize(da) 230 struct dio_attach_args *da; 231 { 232 int i; 233 234 /* 235 * Deal with lame internal HP-IB controllers which don't have 236 * consistent/reliable device ids. 237 */ 238 if (da->da_scode == 7 && internalhpib) 239 return (1); 240 241 /* 242 * Find the dio_devdata matchind the primary id. 243 * If we're a framebuffer, we also check the secondary id. 244 */ 245 for (i = 0; i < DIO_NDEVICES; i++) { 246 if (da->da_id == dio_devdatas[i].dd_id) { 247 if (DIO_ISFRAMEBUFFER(da->da_id)) { 248 if (da->da_secid == dio_devdatas[i].dd_secid) { 249 goto foundit; 250 } 251 } else { 252 foundit: 253 return (dio_devdatas[i].dd_nscode); 254 } 255 } 256 } 257 258 /* 259 * Device is unknown. Print a warning and assume a default. 260 */ 261 printf("WARNING: select code size unknown for id = 0x%x secid = 0x%x\n", 262 da->da_id, da->da_secid); 263 return (1); 264 } 265 266 /* 267 * Return a reasonable description of a DIO device. 268 */ 269 char * 270 dio_devinfo(da, buf, buflen) 271 struct dio_attach_args *da; 272 char *buf; 273 size_t buflen; 274 { 275 #ifdef DIOVERBOSE 276 int i; 277 #endif 278 279 memset(buf, 0, buflen); 280 281 /* 282 * Deal with lame internal HP-IB controllers which don't have 283 * consistent/reliable device ids. 284 */ 285 if (da->da_scode == 7 && internalhpib) { 286 sprintf(buf, DIO_DEVICE_DESC_IHPIB); 287 return (buf); 288 } 289 290 #ifdef DIOVERBOSE 291 /* 292 * Find the description matching our primary id. 293 * If we're a framebuffer, we also check the secondary id. 294 */ 295 for (i = 0; i < DIO_NDEVICES; i++) { 296 if (da->da_id == dio_devdescs[i].dd_id) { 297 if (DIO_ISFRAMEBUFFER(da->da_id)) { 298 if (da->da_secid == dio_devdescs[i].dd_secid) { 299 goto foundit; 300 } 301 } else { 302 foundit: 303 sprintf(buf, "%s", dio_devdescs[i].dd_desc); 304 return (buf); 305 } 306 } 307 } 308 #endif /* DIOVERBOSE */ 309 310 /* 311 * Device is unknown. Construct something reasonable. 312 */ 313 sprintf(buf, "device id = 0x%x secid = 0x%x", 314 da->da_id, da->da_secid); 315 return (buf); 316 } 317 318 /* 319 * Establish an interrupt handler for a DIO device. 320 */ 321 void * 322 dio_intr_establish(func, arg, ipl, priority) 323 int (*func) __P((void *)); 324 void *arg; 325 int ipl; 326 int priority; 327 { 328 void *ih; 329 330 ih = intr_establish(func, arg, ipl, priority); 331 332 if (priority == IPL_BIO) 333 dmacomputeipl(); 334 335 return (ih); 336 } 337 338 /* 339 * Remove an interrupt handler for a DIO device. 340 */ 341 void 342 dio_intr_disestablish(arg) 343 void *arg; 344 { 345 struct hp300_intrhand *ih = arg; 346 int priority = ih->ih_priority; 347 348 intr_disestablish(arg); 349 350 if (priority == IPL_BIO) 351 dmacomputeipl(); 352 } 353
Indexes created Wed Sep 24 05:09:52 GMT 2025