1 /* $NetBSD: dio.c,v 1.23 2003/05/24 06:21:22 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 1.23 2003/05/24 06:21:22 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/bus.h> 54 55 #include <uvm/uvm_extern.h> 56 57 #include <machine/autoconf.h> 58 #include <machine/cpu.h> 59 #include <machine/hp300spu.h> 60 61 #include <hp300/dev/dmavar.h> 62 63 #include <hp300/dev/dioreg.h> 64 #include <hp300/dev/diovar.h> 65 66 #include <hp300/dev/diodevs.h> 67 #include <hp300/dev/diodevs_data.h> 68 69 #include "locators.h" 70 #define diocf_scode cf_loc[DIOCF_SCODE] 71 72 73 static int dio_scodesize __P((struct dio_attach_args *)); 74 char *dio_devinfo __P((struct dio_attach_args *, char *, size_t)); 75 76 int diomatch __P((struct device *, struct cfdata *, void *)); 77 void dioattach __P((struct device *, struct device *, void *)); 78 int dioprint __P((void *, const char *)); 79 int diosubmatch __P((struct device *, struct cfdata *, void *)); 80 81 CFATTACH_DECL(dio, sizeof(struct device), 82 diomatch, dioattach, NULL, NULL); 83 84 int 85 diomatch(parent, match, aux) 86 struct device *parent; 87 struct cfdata *match; 88 void *aux; 89 { 90 static int dio_matched = 0; 91 92 /* Allow only one instance. */ 93 if (dio_matched) 94 return (0); 95 96 dio_matched = 1; 97 return (1); 98 } 99 100 void 101 dioattach(parent, self, aux) 102 struct device *parent, *self; 103 void *aux; 104 { 105 struct dio_attach_args da; 106 caddr_t pa, va; 107 int scode, scmax, scodesize; 108 109 printf("\n"); 110 111 scmax = DIO_SCMAX(machineid); 112 113 for (scode = 0; scode < scmax; ) { 114 if (DIO_INHOLE(scode)) { 115 scode++; 116 continue; 117 } 118 119 /* 120 * Temporarily map the space corresponding to 121 * the current select code unless: 122 */ 123 pa = dio_scodetopa(scode); 124 va = iomap(pa, PAGE_SIZE); 125 if (va == NULL) { 126 printf("%s: can't map scode %d\n", 127 self->dv_xname, scode); 128 scode++; 129 continue; 130 } 131 132 /* Check for hardware. */ 133 if (badaddr(va)) { 134 iounmap(va, PAGE_SIZE); 135 scode++; 136 continue; 137 } 138 139 /* Fill out attach args. */ 140 memset(&da, 0, sizeof(da)); 141 da.da_bst = HP300_BUS_SPACE_DIO; 142 da.da_scode = scode; 143 144 da.da_id = DIO_ID(va); 145 if (DIO_ISFRAMEBUFFER(da.da_id)) 146 da.da_secid = DIO_SECID(va); 147 da.da_addr = (bus_addr_t)dio_scodetopa(scode); 148 da.da_size = DIO_SIZE(scode, va); 149 scodesize = dio_scodesize(&da); 150 if (DIO_ISDIO(scode)) 151 da.da_size *= scodesize; 152 da.da_ipl = DIO_IPL(va); 153 154 /* No longer need the device to be mapped. */ 155 iounmap(va, PAGE_SIZE); 156 157 /* Attach matching device. */ 158 config_found_sm(self, &da, dioprint, diosubmatch); 159 scode += scodesize; 160 } 161 } 162 163 int 164 diosubmatch(parent, cf, aux) 165 struct device *parent; 166 struct cfdata *cf; 167 void *aux; 168 { 169 struct dio_attach_args *da = aux; 170 171 if (cf->diocf_scode != DIOCF_SCODE_DEFAULT && 172 cf->diocf_scode != da->da_scode) 173 return (0); 174 175 return (config_match(parent, cf, aux)); 176 } 177 178 int 179 dioprint(aux, pnp) 180 void *aux; 181 const char *pnp; 182 { 183 struct dio_attach_args *da = aux; 184 char buf[128]; 185 186 if (pnp) 187 aprint_normal("%s at %s", 188 dio_devinfo(da, buf, sizeof(buf)), pnp); 189 aprint_normal(" scode %d ipl %d", da->da_scode, da->da_ipl); 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 (DIO_ISDIO(scode)) 203 rval = DIO_BASE + (scode * DIO_DEVSIZE); 204 else if (DIO_ISDIOII(scode)) 205 rval = DIOII_BASE + ((scode - DIOII_SCBASE) * DIOII_DEVSIZE); 206 else 207 rval = 0; 208 209 return ((void *)rval); 210 } 211 212 /* 213 * Return the select code size for this device, defaulting to 1 214 * if we don't know what kind of device we have. 215 */ 216 static int 217 dio_scodesize(da) 218 struct dio_attach_args *da; 219 { 220 int i; 221 222 /* 223 * Find the dio_devdata matchind the primary id. 224 * If we're a framebuffer, we also check the secondary id. 225 */ 226 for (i = 0; i < DIO_NDEVICES; i++) { 227 if (da->da_id == dio_devdatas[i].dd_id) { 228 if (DIO_ISFRAMEBUFFER(da->da_id)) { 229 if (da->da_secid == dio_devdatas[i].dd_secid) { 230 goto foundit; 231 } 232 } else { 233 foundit: 234 return (dio_devdatas[i].dd_nscode); 235 } 236 } 237 } 238 239 /* 240 * Device is unknown. Print a warning and assume a default. 241 */ 242 printf("WARNING: select code size unknown for id = 0x%x secid = 0x%x\n", 243 da->da_id, da->da_secid); 244 return (1); 245 } 246 247 /* 248 * Return a reasonable description of a DIO device. 249 */ 250 char * 251 dio_devinfo(da, buf, buflen) 252 struct dio_attach_args *da; 253 char *buf; 254 size_t buflen; 255 { 256 #ifdef DIOVERBOSE 257 int i; 258 #endif 259 260 memset(buf, 0, buflen); 261 262 #ifdef DIOVERBOSE 263 /* 264 * Find the description matching our primary id. 265 * If we're a framebuffer, we also check the secondary id. 266 */ 267 for (i = 0; i < DIO_NDEVICES; i++) { 268 if (da->da_id == dio_devdescs[i].dd_id) { 269 if (DIO_ISFRAMEBUFFER(da->da_id)) { 270 if (da->da_secid == dio_devdescs[i].dd_secid) { 271 goto foundit; 272 } 273 } else { 274 foundit: 275 sprintf(buf, "%s", dio_devdescs[i].dd_desc); 276 return (buf); 277 } 278 } 279 } 280 #endif /* DIOVERBOSE */ 281 282 /* 283 * Device is unknown. Construct something reasonable. 284 */ 285 sprintf(buf, "device id = 0x%x secid = 0x%x", 286 da->da_id, da->da_secid); 287 return (buf); 288 } 289 290 /* 291 * Establish an interrupt handler for a DIO device. 292 */ 293 void * 294 dio_intr_establish(func, arg, ipl, priority) 295 int (*func) __P((void *)); 296 void *arg; 297 int ipl; 298 int priority; 299 { 300 void *ih; 301 302 ih = intr_establish(func, arg, ipl, priority); 303 304 if (priority == IPL_BIO) 305 dmacomputeipl(); 306 307 return (ih); 308 } 309 310 /* 311 * Remove an interrupt handler for a DIO device. 312 */ 313 void 314 dio_intr_disestablish(arg) 315 void *arg; 316 { 317 struct hp300_intrhand *ih = arg; 318 int priority = ih->ih_priority; 319 320 intr_disestablish(arg); 321 322 if (priority == IPL_BIO) 323 dmacomputeipl(); 324 } 325