dio.c revision 1.22
1 /* $NetBSD: dio.c,v 1.22 2003/04/01 20:41:36 thorpej 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 1.22 2003/04/01 20:41:36 thorpej 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 <uvm/uvm_extern.h> 54 55 #include <machine/autoconf.h> 56 #include <machine/cpu.h> 57 #include <machine/hp300spu.h> 58 59 #include <hp300/dev/dmavar.h> 60 61 #include <hp300/dev/dioreg.h> 62 #include <hp300/dev/diovar.h> 63 64 #include <hp300/dev/diodevs.h> 65 #include <hp300/dev/diodevs_data.h> 66 67 extern caddr_t internalhpib; 68 69 int dio_scodesize __P((struct dio_attach_args *)); 70 char *dio_devinfo __P((struct dio_attach_args *, char *, size_t)); 71 72 int diomatch __P((struct device *, struct cfdata *, void *)); 73 void dioattach __P((struct device *, struct device *, void *)); 74 int dioprint __P((void *, const char *)); 75 int diosubmatch __P((struct device *, struct cfdata *, void *)); 76 77 CFATTACH_DECL(dio, sizeof(struct device), 78 diomatch, dioattach, NULL, NULL); 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 printf("\n"); 106 107 scmax = DIO_SCMAX(machineid); 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 */ 122 pa = dio_scodetopa(scode); 123 if ((scode == 7) && internalhpib) 124 va = internalhpib = (caddr_t)IIOV(pa); 125 else { 126 va = iomap(pa, PAGE_SIZE); 127 if (va == NULL) { 128 printf("%s: can't map scode %d\n", 129 self->dv_xname, scode); 130 scode++; 131 continue; 132 } 133 didmap = 1; 134 } 135 136 /* Check for hardware. */ 137 if (badaddr(va)) { 138 if (didmap) 139 iounmap(va, PAGE_SIZE); 140 scode++; 141 continue; 142 } 143 144 /* Fill out attach args. */ 145 memset(&da, 0, sizeof(da)); 146 da.da_bst = HP300_BUS_SPACE_DIO; 147 da.da_scode = scode; 148 /* 149 * Internal HP-IB doesn't always return a device ID, 150 * so we rely on the sysflags. 151 */ 152 if ((scode == 7) && internalhpib) 153 da.da_id = DIO_DEVICE_ID_IHPIB; 154 else 155 da.da_id = DIO_ID(va); 156 157 if (DIO_ISFRAMEBUFFER(da.da_id)) 158 da.da_secid = DIO_SECID(va); 159 160 da.da_size = DIO_SIZE(scode, va); 161 scodesize = dio_scodesize(&da); 162 if (DIO_ISDIO(scode)) 163 da.da_size *= scodesize; 164 165 /* No longer need the device to be mapped. */ 166 if (didmap) 167 iounmap(va, PAGE_SIZE); 168 169 /* Attach matching device. */ 170 config_found_sm(self, &da, dioprint, diosubmatch); 171 scode += scodesize; 172 } 173 } 174 175 int 176 diosubmatch(parent, cf, aux) 177 struct device *parent; 178 struct cfdata *cf; 179 void *aux; 180 { 181 struct dio_attach_args *da = aux; 182 183 if (cf->diocf_scode != DIOCF_SCODE_DEFAULT && 184 cf->diocf_scode != da->da_scode) 185 return (0); 186 187 return (config_match(parent, cf, aux)); 188 } 189 190 int 191 dioprint(aux, pnp) 192 void *aux; 193 const char *pnp; 194 { 195 struct dio_attach_args *da = aux; 196 char buf[128]; 197 198 if (pnp) 199 aprint_normal("%s at %s", 200 dio_devinfo(da, buf, sizeof(buf)), pnp); 201 aprint_normal(" scode %d", da->da_scode); 202 return (UNCONF); 203 } 204 205 /* 206 * Convert a select code to a system physical address. 207 */ 208 void * 209 dio_scodetopa(scode) 210 int scode; 211 { 212 u_long rval; 213 214 if (scode == 7 && internalhpib) 215 rval = DIO_IHPIBADDR; 216 else if (DIO_ISDIO(scode)) 217 rval = DIO_BASE + (scode * DIO_DEVSIZE); 218 else if (DIO_ISDIOII(scode)) 219 rval = DIOII_BASE + ((scode - DIOII_SCBASE) * DIOII_DEVSIZE); 220 else 221 rval = 0; 222 223 return ((void *)rval); 224 } 225 226 /* 227 * Return the select code size for this device, defaulting to 1 228 * if we don't know what kind of device we have. 229 */ 230 int 231 dio_scodesize(da) 232 struct dio_attach_args *da; 233 { 234 int i; 235 236 /* 237 * Deal with lame internal HP-IB controllers which don't have 238 * consistent/reliable device ids. 239 */ 240 if (da->da_scode == 7 && internalhpib) 241 return (1); 242 243 /* 244 * Find the dio_devdata matchind the primary id. 245 * If we're a framebuffer, we also check the secondary id. 246 */ 247 for (i = 0; i < DIO_NDEVICES; i++) { 248 if (da->da_id == dio_devdatas[i].dd_id) { 249 if (DIO_ISFRAMEBUFFER(da->da_id)) { 250 if (da->da_secid == dio_devdatas[i].dd_secid) { 251 goto foundit; 252 } 253 } else { 254 foundit: 255 return (dio_devdatas[i].dd_nscode); 256 } 257 } 258 } 259 260 /* 261 * Device is unknown. Print a warning and assume a default. 262 */ 263 printf("WARNING: select code size unknown for id = 0x%x secid = 0x%x\n", 264 da->da_id, da->da_secid); 265 return (1); 266 } 267 268 /* 269 * Return a reasonable description of a DIO device. 270 */ 271 char * 272 dio_devinfo(da, buf, buflen) 273 struct dio_attach_args *da; 274 char *buf; 275 size_t buflen; 276 { 277 #ifdef DIOVERBOSE 278 int i; 279 #endif 280 281 memset(buf, 0, buflen); 282 283 /* 284 * Deal with lame internal HP-IB controllers which don't have 285 * consistent/reliable device ids. 286 */ 287 if (da->da_scode == 7 && internalhpib) { 288 sprintf(buf, DIO_DEVICE_DESC_IHPIB); 289 return (buf); 290 } 291 292 #ifdef DIOVERBOSE 293 /* 294 * Find the description matching our primary id. 295 * If we're a framebuffer, we also check the secondary id. 296 */ 297 for (i = 0; i < DIO_NDEVICES; i++) { 298 if (da->da_id == dio_devdescs[i].dd_id) { 299 if (DIO_ISFRAMEBUFFER(da->da_id)) { 300 if (da->da_secid == dio_devdescs[i].dd_secid) { 301 goto foundit; 302 } 303 } else { 304 foundit: 305 sprintf(buf, "%s", dio_devdescs[i].dd_desc); 306 return (buf); 307 } 308 } 309 } 310 #endif /* DIOVERBOSE */ 311 312 /* 313 * Device is unknown. Construct something reasonable. 314 */ 315 sprintf(buf, "device id = 0x%x secid = 0x%x", 316 da->da_id, da->da_secid); 317 return (buf); 318 } 319 320 /* 321 * Establish an interrupt handler for a DIO device. 322 */ 323 void * 324 dio_intr_establish(func, arg, ipl, priority) 325 int (*func) __P((void *)); 326 void *arg; 327 int ipl; 328 int priority; 329 { 330 void *ih; 331 332 ih = intr_establish(func, arg, ipl, priority); 333 334 if (priority == IPL_BIO) 335 dmacomputeipl(); 336 337 return (ih); 338 } 339 340 /* 341 * Remove an interrupt handler for a DIO device. 342 */ 343 void 344 dio_intr_disestablish(arg) 345 void *arg; 346 { 347 struct hp300_intrhand *ih = arg; 348 int priority = ih->ih_priority; 349 350 intr_disestablish(arg); 351 352 if (priority == IPL_BIO) 353 dmacomputeipl(); 354 } 355
Indexes created Tue Sep 23 20:09:58 GMT 2025