dio.c revision 1.6
1 /* $NetBSD: dio.c,v 1.6 1997/04/27 20:58:55 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 #include <machine/hp300spu.h> 52 53 #include <hp300/dev/dioreg.h> 54 #include <hp300/dev/diovar.h> 55 56 #include <hp300/dev/diodevs.h> 57 #include <hp300/dev/diodevs_data.h> 58 59 extern caddr_t internalhpib; 60 61 int dio_scodesize __P((struct dio_attach_args *)); 62 char *dio_devinfo __P((struct dio_attach_args *, char *, size_t)); 63 64 int diomatch __P((struct device *, struct cfdata *, void *)); 65 void dioattach __P((struct device *, struct device *, void *)); 66 int dioprint __P((void *, const char *)); 67 int diosubmatch __P((struct device *, struct cfdata *, void *)); 68 69 struct cfattach dio_ca = { 70 sizeof(struct device), diomatch, dioattach 71 }; 72 73 struct cfdriver dio_cd = { 74 NULL, "dio", DV_DULL 75 }; 76 77 int 78 diomatch(parent, match, aux) 79 struct device *parent; 80 struct cfdata *match; 81 void *aux; 82 { 83 static int dio_matched = 0; 84 85 /* Allow only one instance. */ 86 if (dio_matched) 87 return (0); 88 89 dio_matched = 1; 90 return (1); 91 } 92 93 void 94 dioattach(parent, self, aux) 95 struct device *parent, *self; 96 void *aux; 97 { 98 struct dio_attach_args da; 99 caddr_t pa, va; 100 int scode, scmax, didmap, scodesize; 101 102 scmax = DIO_SCMAX(machineid); 103 printf("\n"); 104 105 for (scode = 0; scode < scmax; ) { 106 if (DIO_INHOLE(scode)) { 107 scode++; 108 continue; 109 } 110 111 didmap = 0; 112 113 /* 114 * Temporarily map the space corresponding to 115 * the current select code unless: 116 * - this is the internal hpib select code, 117 * - this is the console select code. 118 */ 119 pa = dio_scodetopa(scode); 120 if (scode == conscode) 121 va = conaddr; 122 else 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 bzero(&da, sizeof(da)); 145 da.da_scode = scode; 146 da.da_id = DIO_ID(va); 147 148 if (DIO_ISFRAMEBUFFER(da.da_id)) 149 da.da_secid = DIO_SECID(va); 150 151 da.da_size = DIO_SIZE(scode, va); 152 scodesize = dio_scodesize(&da); 153 if (DIO_ISDIO(scode)) 154 da.da_size *= scodesize; 155 156 /* No longer need the device to be mapped. */ 157 if (didmap) 158 iounmap(va, NBPG); 159 160 /* Attach matching device. */ 161 config_found_sm(self, &da, dioprint, diosubmatch); 162 scode += scodesize; 163 } 164 } 165 166 int 167 diosubmatch(parent, cf, aux) 168 struct device *parent; 169 struct cfdata *cf; 170 void *aux; 171 { 172 struct dio_attach_args *da = aux; 173 174 if (cf->diocf_scode != DIO_UNKNOWN_SCODE && 175 cf->diocf_scode != da->da_scode) 176 return (0); 177 178 return ((*cf->cf_attach->ca_match)(parent, cf, aux)); 179 } 180 181 int 182 dioprint(aux, pnp) 183 void *aux; 184 const char *pnp; 185 { 186 struct dio_attach_args *da = aux; 187 char buf[128]; 188 189 if (pnp) 190 printf("%s at %s", dio_devinfo(da, buf, sizeof(buf)), pnp); 191 printf(" scode %d", da->da_scode); 192 return (UNCONF); 193 } 194 195 /* 196 * Convert a select code to a system physical address. 197 */ 198 void * 199 dio_scodetopa(scode) 200 int scode; 201 { 202 u_long rval; 203 204 if (scode == 7 && internalhpib) 205 rval = DIO_IHPIBADDR; 206 else if (DIO_ISDIO(scode)) 207 rval = DIO_BASE + (scode * DIO_DEVSIZE); 208 else if (DIO_ISDIOII(scode)) 209 rval = DIOII_BASE + ((scode - DIOII_SCBASE) * DIOII_DEVSIZE); 210 else 211 rval = 0; 212 213 return ((void *)rval); 214 } 215 216 /* 217 * Return the select code size for this device, defaulting to 1 218 * if we don't know what kind of device we have. 219 */ 220 int 221 dio_scodesize(da) 222 struct dio_attach_args *da; 223 { 224 int i; 225 226 /* 227 * Deal with lame internal HP-IB controllers which don't have 228 * consistent/reliable device ids. 229 */ 230 if (da->da_scode == 7 && internalhpib) 231 return (1); 232 233 /* 234 * Find the dio_devdata matchind the primary id. 235 * If we're a framebuffer, we also check the secondary id. 236 */ 237 for (i = 0; i < DIO_NDEVICES; i++) { 238 if (da->da_id == dio_devdatas[i].dd_id) { 239 if (DIO_ISFRAMEBUFFER(da->da_id)) { 240 if (da->da_secid == dio_devdatas[i].dd_secid) { 241 goto foundit; 242 } 243 } else { 244 foundit: 245 return (dio_devdatas[i].dd_nscode); 246 } 247 } 248 } 249 250 /* 251 * Device is unknown. Print a warning and assume a default. 252 */ 253 printf("WARNING: select code size unknown for id = 0x%x secid = 0x%x\n", 254 da->da_id, da->da_secid); 255 return (1); 256 } 257 258 /* 259 * Return a reasonable description of a DIO device. 260 */ 261 char * 262 dio_devinfo(da, buf, buflen) 263 struct dio_attach_args *da; 264 char *buf; 265 size_t buflen; 266 { 267 #ifdef DIOVERBOSE 268 int i; 269 #endif 270 271 bzero(buf, buflen); 272 273 /* 274 * Deal with lame internal HP-IB controllers which don't have 275 * consistent/reliable device ids. 276 */ 277 if (da->da_scode == 7 && internalhpib) { 278 sprintf(buf, DIO_DEVICE_DESC_IHPIB); 279 return (buf); 280 } 281 282 #ifdef DIOVERBOSE 283 /* 284 * Find the description matching our primary id. 285 * If we're a framebuffer, we also check the secondary id. 286 */ 287 for (i = 0; i < DIO_NDEVICES; i++) { 288 if (da->da_id == dio_devdescs[i].dd_id) { 289 if (DIO_ISFRAMEBUFFER(da->da_id)) { 290 if (da->da_secid == dio_devdescs[i].dd_secid) { 291 goto foundit; 292 } 293 } else { 294 foundit: 295 sprintf(buf, "%s", dio_devdescs[i].dd_desc); 296 return (buf); 297 } 298 } 299 } 300 #endif /* DIOVERBOSE */ 301 302 /* 303 * Device is unknown. Construct something reasonable. 304 */ 305 sprintf(buf, "device id = 0x%x secid = 0x%x", 306 da->da_id, da->da_secid); 307 return (buf); 308 } 309
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