dio.c revision 1.3
1 /* $NetBSD: dio.c,v 1.3 1997/01/30 09:18:37 thorpej Exp $ */ 2 3 /*- 4 * Copyright (c) 1996 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 REGENTS OR CONTRIBUTORS BE 30 * 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/param.h> 44 #include <sys/systm.h> 45 #include <sys/device.h> 46 #include <sys/kernel.h> 47 #include <sys/device.h> 48 49 #include <machine/autoconf.h> 50 #include <machine/cpu.h> 51 52 #include <hp300/dev/dioreg.h> 53 #include <hp300/dev/diovar.h> 54 55 #include <hp300/dev/diodevs.h> 56 #include <hp300/dev/diodevs_data.h> 57 58 extern caddr_t internalhpib; 59 60 int dio_scodesize __P((struct dio_attach_args *)); 61 char *dio_devinfo __P((struct dio_attach_args *, char *, size_t)); 62 63 int diomatch __P((struct device *, struct cfdata *, void *)); 64 void dioattach __P((struct device *, struct device *, void *)); 65 int dioprint __P((void *, const char *)); 66 int diosubmatch __P((struct device *, struct cfdata *, void *)); 67 68 struct cfattach dio_ca = { 69 sizeof(struct device), diomatch, dioattach 70 }; 71 72 struct cfdriver dio_cd = { 73 NULL, "dio", DV_DULL 74 }; 75 76 int 77 diomatch(parent, match, aux) 78 struct device *parent; 79 struct cfdata *match; 80 void *aux; 81 { 82 static int dio_matched = 0; 83 84 /* Allow only one instance. */ 85 if (dio_matched) 86 return (0); 87 88 dio_matched = 1; 89 return (1); 90 } 91 92 void 93 dioattach(parent, self, aux) 94 struct device *parent, *self; 95 void *aux; 96 { 97 struct dio_attach_args da; 98 caddr_t pa, va; 99 int scode, scmax, didmap, scodesize; 100 101 scmax = DIO_SCMAX(machineid); 102 printf("\n"); 103 104 for (scode = 0; scode < scmax; ) { 105 if (DIO_INHOLE(scode)) { 106 scode++; 107 continue; 108 } 109 110 didmap = 0; 111 112 /* 113 * Temporarily map the space corresponding to 114 * the current select code unless: 115 * - this is the internal hpib select code, 116 * - this is the console select code. 117 */ 118 pa = dio_scodetopa(scode); 119 if (scode == conscode) 120 va = conaddr; 121 else if ((scode == 7) && internalhpib) 122 va = internalhpib = (caddr_t)IIOV(pa); 123 else { 124 va = iomap(pa, NBPG); 125 if (va == NULL) { 126 printf("%s: can't map scode %d\n", scode); 127 scode++; 128 continue; 129 } 130 didmap = 1; 131 } 132 133 /* Check for hardware. */ 134 if (badaddr(va)) { 135 if (didmap) 136 iounmap(va, NBPG); 137 scode++; 138 continue; 139 } 140 141 /* Fill out attach args. */ 142 bzero(&da, sizeof(da)); 143 da.da_scode = scode; 144 da.da_id = DIO_ID(va); 145 146 if (DIO_ISFRAMEBUFFER(da.da_id)) 147 da.da_secid = DIO_SECID(va); 148 149 da.da_size = DIO_SIZE(scode, va); 150 scodesize = dio_scodesize(&da); 151 if (DIO_ISDIO(scode)) 152 da.da_size *= scodesize; 153 154 /* No longer need the device to be mapped. */ 155 if (didmap) 156 iounmap(va, NBPG); 157 158 /* Attach matching device. */ 159 config_found_sm(self, &da, dioprint, diosubmatch); 160 scode += scodesize; 161 } 162 } 163 164 int 165 diosubmatch(parent, cf, aux) 166 struct device *parent; 167 struct cfdata *cf; 168 void *aux; 169 { 170 struct dio_attach_args *da = aux; 171 172 if (cf->diocf_scode != DIO_UNKNOWN_SCODE && 173 cf->diocf_scode != da->da_scode) 174 return (0); 175 176 return ((*cf->cf_attach->ca_match)(parent, cf, aux)); 177 } 178 179 int 180 dioprint(aux, pnp) 181 void *aux; 182 const char *pnp; 183 { 184 struct dio_attach_args *da = aux; 185 char buf[128]; 186 187 if (pnp) 188 printf("%s at %s", dio_devinfo(da, buf, sizeof(buf)), pnp); 189 printf(" scode %d", da->da_scode); 190 return (UNCONF); 191 } 192 193 /* 194 * Convert a select code to a system physical address. 195 */ 196 void * 197 dio_scodetopa(scode) 198 int scode; 199 { 200 u_long rval; 201 202 if (scode == 7 && internalhpib) 203 rval = DIO_IHPIBADDR; 204 else if (DIO_ISDIO(scode)) 205 rval = DIO_BASE + (scode * DIO_DEVSIZE); 206 else if (DIO_ISDIOII(scode)) 207 rval = DIOII_BASE + ((scode - DIOII_SCBASE) * DIOII_DEVSIZE); 208 else 209 rval = 0; 210 211 return ((void *)rval); 212 } 213 214 /* 215 * Return the select code size for this device, defaulting to 1 216 * if we don't know what kind of device we have. 217 */ 218 int 219 dio_scodesize(da) 220 struct dio_attach_args *da; 221 { 222 int i; 223 224 /* 225 * Deal with lame internal HP-IB controllers which don't have 226 * consistent/reliable device ids. 227 */ 228 if (da->da_scode == 7 && internalhpib) 229 return (1); 230 231 /* 232 * Find the dio_devdata matchind the primary id. 233 * If we're a framebuffer, we also check the secondary id. 234 */ 235 for (i = 0; i < DIO_NDEVICES; i++) { 236 if (da->da_id == dio_devdatas[i].dd_id) { 237 if (DIO_ISFRAMEBUFFER(da->da_id)) { 238 if (da->da_secid == dio_devdatas[i].dd_secid) { 239 goto foundit; 240 } 241 } else { 242 foundit: 243 return (dio_devdatas[i].dd_nscode); 244 } 245 } 246 } 247 248 /* 249 * Device is unknown. Print a warning and assume a default. 250 */ 251 printf("WARNING: select code size unknown for id = 0x%x secid = 0x%x\n", 252 da->da_id, da->da_secid); 253 return (1); 254 } 255 256 /* 257 * Return a reasonable description of a DIO device. 258 */ 259 char * 260 dio_devinfo(da, buf, buflen) 261 struct dio_attach_args *da; 262 char *buf; 263 size_t buflen; 264 { 265 int i; 266 267 bzero(buf, buflen); 268 269 /* 270 * Deal with lame internal HP-IB controllers which don't have 271 * consistent/reliable device ids. 272 */ 273 if (da->da_scode == 7 && internalhpib) { 274 sprintf(buf, DIO_DEVICE_DESC_IHPIB); 275 return (buf); 276 } 277 278 #ifdef DIOVERBOSE 279 /* 280 * Find the description matching our primary id. 281 * If we're a framebuffer, we also check the secondary id. 282 */ 283 for (i = 0; i < DIO_NDEVICES; i++) { 284 if (da->da_id == dio_devdescs[i].dd_id) { 285 if (DIO_ISFRAMEBUFFER(da->da_id)) { 286 if (da->da_secid == dio_devdescs[i].dd_secid) { 287 goto foundit; 288 } 289 } else { 290 foundit: 291 sprintf(buf, "%s", dio_devdescs[i].dd_desc); 292 return (buf); 293 } 294 } 295 } 296 #endif /* DIOVERBOSE */ 297 298 /* 299 * Device is unknown. Construct something reasonable. 300 */ 301 sprintf(buf, "device id = 0x%x secid = 0x%x", 302 da->da_id, da->da_secid); 303 return (buf); 304 } 305
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