fdc_acpi.c revision 1.22
1 /* $NetBSD: fdc_acpi.c,v 1.22 2004/05/01 12:03:48 kochi Exp $ */ 2 3 /* 4 * Copyright (c) 2002 Jared D. McNeill <jmcneill (at) invisible.ca> 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. The name of the author may not be used to endorse or promote products 13 * derived from this software without specific prior written permission. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 20 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 21 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 22 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 23 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 25 * SUCH DAMAGE. 26 */ 27 28 /* 29 * ACPI attachment for the PC Floppy Controller driver, based on 30 * sys/arch/i386/pnpbios/fdc_pnpbios.c by Jason R. Thorpe 31 */ 32 33 #include <sys/cdefs.h> 34 __KERNEL_RCSID(0, "$NetBSD: fdc_acpi.c,v 1.22 2004/05/01 12:03:48 kochi Exp $"); 35 36 #include "rnd.h" 37 38 #include <sys/param.h> 39 #include <sys/systm.h> 40 #include <sys/callout.h> 41 #include <sys/device.h> 42 #include <sys/buf.h> 43 #include <sys/queue.h> 44 #include <sys/disk.h> 45 #if NRND > 0 46 #include <sys/rnd.h> 47 #endif 48 49 #include <machine/bus.h> 50 #include <machine/intr.h> 51 52 #include <dev/isa/isavar.h> 53 #include <dev/isa/isadmavar.h> 54 55 #include <dev/acpi/acpica.h> 56 #include <dev/acpi/acpireg.h> 57 #include <dev/acpi/acpivar.h> 58 59 #include <dev/isa/fdcvar.h> 60 #include <dev/isa/fdvar.h> 61 #include <dev/isa/fdreg.h> 62 63 #include <dev/acpi/fdc_acpireg.h> 64 65 static int fdc_acpi_match(struct device *, struct cfdata *, void *); 66 static void fdc_acpi_attach(struct device *, struct device *, void *); 67 68 struct fdc_acpi_softc { 69 struct fdc_softc sc_fdc; 70 bus_space_handle_t sc_baseioh; 71 struct acpi_devnode *sc_node; /* ACPI devnode */ 72 }; 73 74 static int fdc_acpi_enumerate(struct fdc_acpi_softc *); 75 static void fdc_acpi_getknownfds(struct fdc_acpi_softc *); 76 77 static const struct fd_type *fdc_acpi_nvtotype(char *, int, int); 78 79 CFATTACH_DECL(fdc_acpi, sizeof(struct fdc_acpi_softc), fdc_acpi_match, 80 fdc_acpi_attach, NULL, NULL); 81 82 /* 83 * Supported device IDs 84 */ 85 86 static const char * const fdc_acpi_ids[] = { 87 "PNP07??", /* PC standard floppy disk controller */ 88 NULL 89 }; 90 91 /* 92 * fdc_acpi_match: autoconf(9) match routine 93 */ 94 static int 95 fdc_acpi_match(struct device *parent, struct cfdata *match, void *aux) 96 { 97 struct acpi_attach_args *aa = aux; 98 99 if (aa->aa_node->ad_type != ACPI_TYPE_DEVICE) 100 return 0; 101 102 return acpi_match_hid(aa->aa_node->ad_devinfo, fdc_acpi_ids); 103 } 104 105 /* 106 * fdc_acpi_attach: autoconf(9) attach routine 107 */ 108 static void 109 fdc_acpi_attach(struct device *parent, struct device *self, void *aux) 110 { 111 struct fdc_acpi_softc *asc = (struct fdc_acpi_softc *)self; 112 struct fdc_softc *sc = &asc->sc_fdc; 113 struct acpi_attach_args *aa = aux; 114 struct acpi_io *io, *ctlio; 115 struct acpi_irq *irq; 116 struct acpi_drq *drq; 117 struct acpi_resources res; 118 ACPI_STATUS rv; 119 120 printf("\n"); 121 122 sc->sc_ic = aa->aa_ic; 123 asc->sc_node = aa->aa_node; 124 125 /* parse resources */ 126 rv = acpi_resource_parse(&sc->sc_dev, aa->aa_node->ad_handle, "_CRS", 127 &res, &acpi_resource_parse_ops_default); 128 if (ACPI_FAILURE(rv)) 129 return; 130 131 /* find our i/o registers */ 132 io = acpi_res_io(&res, 0); 133 if (io == NULL) { 134 printf("%s: unable to find i/o register resource\n", 135 sc->sc_dev.dv_xname); 136 goto out; 137 } 138 139 /* find our IRQ */ 140 irq = acpi_res_irq(&res, 0); 141 if (irq == NULL) { 142 printf("%s: unable to find irq resource\n", 143 sc->sc_dev.dv_xname); 144 goto out; 145 } 146 147 /* find our DRQ */ 148 drq = acpi_res_drq(&res, 0); 149 if (drq == NULL) { 150 printf("%s: unable to find drq resource\n", 151 sc->sc_dev.dv_xname); 152 goto out; 153 } 154 sc->sc_drq = drq->ar_drq; 155 156 sc->sc_iot = aa->aa_iot; 157 if (bus_space_map(sc->sc_iot, io->ar_base, io->ar_length, 158 0, &asc->sc_baseioh)) { 159 printf("%s: can't map i/o space\n", sc->sc_dev.dv_xname); 160 goto out; 161 } 162 163 switch (io->ar_length) { 164 case 4: 165 sc->sc_ioh = asc->sc_baseioh; 166 break; 167 case 6: 168 if (bus_space_subregion(sc->sc_iot, asc->sc_baseioh, 2, 4, 169 &sc->sc_ioh)) { 170 printf("%s: unable to subregion i/o space\n", 171 sc->sc_dev.dv_xname); 172 goto out; 173 } 174 break; 175 default: 176 printf("%s: unknown size: %d of io mapping\n", 177 sc->sc_dev.dv_xname, io->ar_length); 178 goto out; 179 } 180 181 /* 182 * omitting the controller I/O port. (One has to exist for there to 183 * be a working fdc). Just try and force the mapping in. 184 */ 185 ctlio = acpi_res_io(&res, 1); 186 if (ctlio == NULL) { 187 if (bus_space_map(sc->sc_iot, io->ar_base + io->ar_length + 1, 188 1, 0, &sc->sc_fdctlioh)) { 189 printf("%s: unable to force map ctl i/o space\n", 190 sc->sc_dev.dv_xname); 191 goto out; 192 } 193 printf("%s: ctl io %x did't probe. Forced attach\n", 194 sc->sc_dev.dv_xname, io->ar_base + io->ar_length + 1); 195 } else { 196 if (bus_space_map(sc->sc_iot, ctlio->ar_base, ctlio->ar_length, 197 0, &sc->sc_fdctlioh)) { 198 printf("%s: unable to map ctl i/o space\n", 199 sc->sc_dev.dv_xname); 200 goto out; 201 } 202 } 203 204 sc->sc_ih = isa_intr_establish(aa->aa_ic, irq->ar_irq, 205 (irq->ar_type == ACPI_EDGE_SENSITIVE) ? IST_EDGE : IST_LEVEL, 206 IPL_BIO, fdcintr, sc); 207 208 /* Setup direct configuration of floppy drives */ 209 sc->sc_present = fdc_acpi_enumerate(asc); 210 if (sc->sc_present >= 0) { 211 sc->sc_known = 1; 212 fdc_acpi_getknownfds(asc); 213 } else { 214 /* 215 * XXX if there is no _FDE control method, attempt to 216 * probe without pnp 217 */ 218 #ifdef ACPI_FDC_DEBUG 219 printf("%s: unable to enumerate, attempting normal probe\n", 220 sc->sc_dev.dv_xname); 221 #endif 222 } 223 224 fdcattach(sc); 225 226 out: 227 acpi_resource_cleanup(&res); 228 } 229 230 static int 231 fdc_acpi_enumerate(struct fdc_acpi_softc *asc) 232 { 233 struct fdc_softc *sc = &asc->sc_fdc; 234 ACPI_OBJECT *fde; 235 ACPI_BUFFER buf; 236 ACPI_STATUS rv; 237 UINT32 *p; 238 int i, drives = -1; 239 240 rv = acpi_eval_struct(asc->sc_node->ad_handle, "_FDE", &buf); 241 if (ACPI_FAILURE(rv)) { 242 #ifdef ACPI_FDC_DEBUG 243 printf("%s: failed to evaluate _FDE: %s\n", 244 sc->sc_dev.dv_xname, rv, AcpiFormatException(rv)); 245 #endif 246 return drives; 247 } 248 fde = (ACPI_OBJECT *)buf.Pointer; 249 if (fde->Type != ACPI_TYPE_BUFFER) { 250 printf("%s: expected BUFFER, got %d\n", sc->sc_dev.dv_xname, 251 fde->Type); 252 goto out; 253 } 254 if (fde->Buffer.Length < 5 * sizeof(UINT32)) { 255 printf("%s: expected buffer len of %lu, got %d\n", 256 sc->sc_dev.dv_xname, 257 (unsigned long)(5 * sizeof(UINT32)), fde->Buffer.Length); 258 goto out; 259 } 260 261 p = (UINT32 *) fde->Buffer.Pointer; 262 263 /* 264 * Indexes 0 through 3 are each UINT32 booleans. True if a drive 265 * is present. 266 */ 267 drives = 0; 268 for (i = 0; i < 4; i++) { 269 if (p[i]) drives |= (1 << i); 270 #ifdef ACPI_FDC_DEBUG 271 printf("%s: drive %d %sattached\n", sc->sc_dev.dv_xname, i, 272 p[i] ? "" : "not "); 273 #endif 274 } 275 276 /* 277 * p[4] reports tape presence. Possible values: 278 * 0 - Unknown if device is present 279 * 1 - Device is present 280 * 2 - Device is never present 281 * >2 - Reserved 282 * 283 * we don't currently use this. 284 */ 285 286 out: 287 AcpiOsFree(buf.Pointer); 288 return drives; 289 } 290 291 static void 292 fdc_acpi_getknownfds(struct fdc_acpi_softc *asc) 293 { 294 struct fdc_softc *sc = &asc->sc_fdc; 295 ACPI_OBJECT *fdi, *e; 296 ACPI_BUFFER buf; 297 ACPI_STATUS rv; 298 int i; 299 300 for (i = 0; i < 4; i++) { 301 if ((sc->sc_present & (1 << i)) == 0) 302 continue; 303 rv = acpi_eval_struct(asc->sc_node->ad_handle, "_FDI", &buf); 304 if (ACPI_FAILURE(rv)) { 305 #ifdef ACPI_FDC_DEBUG 306 printf("%s: failed to evaluate _FDI: %s on drive %d\n", 307 sc->sc_dev.dv_xname, AcpiFormatException(rv), i); 308 #endif 309 /* XXX if _FDI fails, assume 1.44MB floppy */ 310 sc->sc_knownfds[i] = &fdc_acpi_fdtypes[0]; 311 continue; 312 } 313 fdi = (ACPI_OBJECT *)buf.Pointer; 314 if (fdi->Type != ACPI_TYPE_PACKAGE) { 315 printf("%s: expected PACKAGE, got %d\n", 316 sc->sc_dev.dv_xname, fdi->Type); 317 goto out; 318 } 319 e = fdi->Package.Elements; 320 sc->sc_knownfds[i] = fdc_acpi_nvtotype(sc->sc_dev.dv_xname, 321 e[1].Integer.Value, e[0].Integer.Value); 322 323 /* if fdc_acpi_nvtotype returns NULL, don't attach drive */ 324 if (!sc->sc_knownfds[i]) 325 sc->sc_present &= ~(1 << i); 326 327 out: 328 AcpiOsFree(buf.Pointer); 329 } 330 } 331 332 static const struct fd_type * 333 fdc_acpi_nvtotype(char *fdc, int nvraminfo, int drive) 334 { 335 int type; 336 337 type = (drive == 0 ? nvraminfo : nvraminfo << 4) & 0xf0; 338 switch (type) { 339 case ACPI_FDC_DISKETTE_NONE: 340 return NULL; 341 case ACPI_FDC_DISKETTE_12M: 342 return &fdc_acpi_fdtypes[1]; 343 case ACPI_FDC_DISKETTE_TYPE5: 344 case ACPI_FDC_DISKETTE_TYPE6: 345 case ACPI_FDC_DISKETTE_144M: 346 return &fdc_acpi_fdtypes[0]; 347 case ACPI_FDC_DISKETTE_360K: 348 return &fdc_acpi_fdtypes[3]; 349 case ACPI_FDC_DISKETTE_720K: 350 return &fdc_acpi_fdtypes[4]; 351 default: 352 #ifdef ACPI_FDC_DEBUG 353 printf("%s: drive %d: unknown device type 0x%x\n", 354 fdc, drive, type); 355 #endif 356 return NULL; 357 } 358 } 359
Indexes created Tue Sep 23 07:09:52 GMT 2025