fdc_acpi.c revision 1.4
1 /* $NetBSD: fdc_acpi.c,v 1.4 2003/01/09 01:25:13 jmcneill 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 1.4 2003/01/09 01:25:13 jmcneill 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 #include <sys/dkstat.h> 46 #if NRND > 0 47 #include <sys/rnd.h> 48 #endif 49 50 #include <machine/bus.h> 51 #include <machine/intr.h> 52 53 #include <dev/isa/isavar.h> 54 #include <dev/isa/isadmavar.h> 55 56 #include <dev/acpi/acpica.h> 57 #include <dev/acpi/acpireg.h> 58 #include <dev/acpi/acpivar.h> 59 60 #include <dev/isa/fdcvar.h> 61 #include <dev/isa/fdvar.h> 62 #include <dev/isa/fdreg.h> 63 64 #include <dev/acpi/fdc_acpireg.h> 65 66 int fdc_acpi_match(struct device *, struct cfdata *, void *); 67 void fdc_acpi_attach(struct device *, struct device *, void *); 68 69 struct fdc_acpi_softc { 70 struct fdc_softc sc_fdc; 71 bus_space_handle_t sc_baseioh; 72 struct acpi_devnode *sc_node; /* ACPI devnode */ 73 }; 74 75 static int fdc_acpi_enumerate(struct fdc_acpi_softc *); 76 static void fdc_acpi_getknownfds(struct fdc_acpi_softc *); 77 78 static const struct fd_type *fdc_acpi_nvtotype(char *, int, int); 79 80 CFATTACH_DECL(fdc_acpi, sizeof(struct fdc_acpi_softc), fdc_acpi_match, 81 fdc_acpi_attach, NULL, NULL); 82 83 /* 84 * Supported device IDs 85 */ 86 87 static const char * const fdc_acpi_ids[] = { 88 "PNP0700", /* PC standard floppy disk controller */ 89 #if 0 /* XXX do we support this? */ 90 "PNP0701", /* Standard floppy controller for MS Device Bay Spec */ 91 #endif 92 NULL 93 }; 94 95 /* 96 * fdc_acpi_match: autoconf(9) match routine 97 */ 98 int 99 fdc_acpi_match(struct device *parent, struct cfdata *match, void *aux) 100 { 101 struct acpi_attach_args *aa = aux; 102 const char *id; 103 int i; 104 105 if (aa->aa_node->ad_type != ACPI_TYPE_DEVICE) 106 return 0; 107 108 for (i = 0; (id = fdc_acpi_ids[i]) != NULL; ++i) { 109 if (strcmp(aa->aa_node->ad_devinfo.HardwareId, id) == 0) 110 return 1; 111 } 112 113 /* No matches found */ 114 return 0; 115 } 116 117 /* 118 * fdc_acpi_attach: autoconf(9) attach routine 119 */ 120 void 121 fdc_acpi_attach(struct device *parent, struct device *self, void *aux) 122 { 123 struct fdc_acpi_softc *asc = (struct fdc_acpi_softc *)self; 124 struct fdc_softc *sc = &asc->sc_fdc; 125 struct acpi_attach_args *aa = aux; 126 struct acpi_resources res; 127 struct acpi_io *io, *ctlio; 128 struct acpi_irq *irq; 129 struct acpi_drq *drq; 130 ACPI_STATUS rv; 131 132 printf("\n"); 133 134 sc->sc_ic = aa->aa_ic; 135 asc->sc_node = aa->aa_node; 136 137 /* parse resources */ 138 rv = acpi_resource_parse(&sc->sc_dev, aa->aa_node, &res, 139 &acpi_resource_parse_ops_default); 140 if (rv != AE_OK) { 141 printf("%s: unable to parse resources\n", sc->sc_dev.dv_xname); 142 return; 143 } 144 145 /* find our i/o registers */ 146 io = acpi_res_io(&res, 0); 147 if (io == NULL) { 148 printf("%s: unable to find i/o register resource\n", 149 sc->sc_dev.dv_xname); 150 return; 151 } 152 153 /* find our IRQ */ 154 irq = acpi_res_irq(&res, 0); 155 if (irq == NULL) { 156 printf("%s: unable to find irq resource\n", 157 sc->sc_dev.dv_xname); 158 return; 159 } 160 161 /* find our DRQ */ 162 drq = acpi_res_drq(&res, 0); 163 if (drq == NULL) { 164 printf("%s: unable to find drq resource\n", 165 sc->sc_dev.dv_xname); 166 return; 167 } 168 sc->sc_drq = drq->ar_drq; 169 170 sc->sc_iot = aa->aa_iot; 171 if (bus_space_map(sc->sc_iot, io->ar_base, io->ar_length, 172 0, &asc->sc_baseioh)) { 173 printf("%s: can't map i/o space\n", sc->sc_dev.dv_xname); 174 return; 175 } 176 177 switch (io->ar_length) { 178 case 4: 179 sc->sc_ioh = asc->sc_baseioh; 180 break; 181 case 6: 182 if (bus_space_subregion(sc->sc_iot, asc->sc_baseioh, 2, 4, 183 &sc->sc_ioh)) { 184 printf("%s: unable to subregion i/o space\n", 185 sc->sc_dev.dv_xname); 186 return; 187 } 188 break; 189 default: 190 printf("%s: unknown size: %d of io mapping\n", 191 sc->sc_dev.dv_xname, io->ar_length); 192 return; 193 } 194 195 /* 196 * omitting the controller I/O port. (One has to exist for there to 197 * be a working fdc). Just try and force the mapping in. 198 */ 199 ctlio = acpi_res_io(&res, 1); 200 if (ctlio == NULL) { 201 if (bus_space_map(sc->sc_iot, io->ar_base + io->ar_length + 1, 202 1, 0, &sc->sc_fdctlioh)) { 203 printf("%s: unable to force map ctl i/o space\n", 204 sc->sc_dev.dv_xname); 205 return; 206 } 207 printf("%s: ctl io %x did't probe. Forced attach\n", 208 sc->sc_dev.dv_xname, io->ar_base + io->ar_length + 1); 209 } else { 210 if (bus_space_map(sc->sc_iot, ctlio->ar_base, ctlio->ar_length, 211 0, &sc->sc_fdctlioh)) { 212 printf("%s: unable to map ctl i/o space\n", 213 sc->sc_dev.dv_xname); 214 return; 215 } 216 } 217 218 sc->sc_ih = isa_intr_establish(aa->aa_ic, irq->ar_irq, 0, 219 IPL_BIO, fdcintr, sc); 220 221 /* Setup direct configuration of floppy drives */ 222 sc->sc_present = fdc_acpi_enumerate(asc); 223 if (sc->sc_present >= 0) { 224 sc->sc_known = 1; 225 fdc_acpi_getknownfds(asc); 226 } else { 227 /* 228 * XXX if there is no _FDE control method, attempt to 229 * probe without pnp 230 */ 231 printf("%s: unable to enumerate, attempting normal probe\n", 232 sc->sc_dev.dv_xname); 233 } 234 235 fdcattach(sc); 236 } 237 238 static int 239 fdc_acpi_enumerate(struct fdc_acpi_softc *asc) 240 { 241 struct fdc_softc *sc = &asc->sc_fdc; 242 ACPI_OBJECT *fde; 243 ACPI_BUFFER buf; 244 ACPI_STATUS rv; 245 UINT8 *p; 246 int i, drives = -1; 247 248 rv = acpi_eval_struct(asc->sc_node->ad_handle, "_FDE", &buf); 249 if (rv != AE_OK) { 250 printf("%s: failed to evalulate _FDE: %x\n", 251 sc->sc_dev.dv_xname, rv); 252 return drives; 253 } 254 fde = (ACPI_OBJECT *)buf.Pointer; 255 if (fde->Type != ACPI_TYPE_BUFFER) { 256 printf("%s: expected BUFFER, got %d\n", sc->sc_dev.dv_xname, 257 fde->Type); 258 goto out; 259 } 260 if (fde->Buffer.Length < 14) { 261 printf("%s: expected buffer len of 14, got %d\n", 262 sc->sc_dev.dv_xname, fde->Buffer.Length); 263 goto out; 264 } 265 266 p = fde->Buffer.Pointer; 267 /* 268 * Indexes 0 through 3 are each UINT32 booleans. True if a drive 269 * is present. 270 */ 271 drives = 0; 272 for (i = 0; i < 4; i++) { 273 if (p[i]) drives |= (1 << i); 274 #ifdef ACPI_FDC_DEBUG 275 printf("%s: drive %d %sattached\n", sc->sc_dev.dv_xname, i, 276 p[i] ? "" : "not "); 277 #endif 278 } 279 280 /* 281 * XXX p[4] reports tape presence. Possible values: 282 * 0 - Unknown if device is present 283 * 1 - Device is present 284 * 2 - Device is never present 285 * >2 - Reserved 286 * How should we handle this? 287 */ 288 289 out: 290 AcpiOsFree(buf.Pointer); 291 return drives; 292 } 293 294 static void 295 fdc_acpi_getknownfds(struct fdc_acpi_softc *asc) 296 { 297 struct fdc_softc *sc = &asc->sc_fdc; 298 ACPI_OBJECT *fdi, *e; 299 ACPI_BUFFER buf; 300 ACPI_STATUS rv; 301 int i; 302 303 for (i = 0; i < 4; i++) { 304 if ((sc->sc_present & (1 << i)) == 0) 305 continue; 306 rv = acpi_eval_struct(asc->sc_node->ad_handle, "_FDI", &buf); 307 if (rv != AE_OK) { 308 #ifdef ACPI_FDC_DEBUG 309 printf("%s: failed to evalulate _FDI: %x on drive %d\n", 310 sc->sc_dev.dv_xname, rv, i); 311 #endif 312 /* XXX if _FDI fails, assume 1.44MB floppy */ 313 sc->sc_knownfds[i] = &fdc_acpi_fdtypes[0]; 314 continue; 315 } 316 fdi = (ACPI_OBJECT *)buf.Pointer; 317 if (fdi->Type != ACPI_TYPE_PACKAGE) { 318 printf("%s: expected PACKAGE, got %d\n", 319 sc->sc_dev.dv_xname, fdi->Type); 320 goto out; 321 } 322 e = fdi->Package.Elements; 323 sc->sc_knownfds[i] = fdc_acpi_nvtotype(sc->sc_dev.dv_xname, 324 e[1].Integer.Value, e[0].Integer.Value); 325 /* XXX What to do if fdc_acpi_nvtotype returns NULL? */ 326 out: 327 AcpiOsFree(buf.Pointer); 328 } 329 } 330 331 static const struct fd_type * 332 fdc_acpi_nvtotype(char *fdc, int nvraminfo, int drive) 333 { 334 int type; 335 336 type = (drive == 0 ? nvraminfo : nvraminfo << 4) & 0xf0; 337 switch (type) { 338 case ACPI_FDC_DISKETTE_NONE: 339 return NULL; 340 case ACPI_FDC_DISKETTE_12M: 341 return &fdc_acpi_fdtypes[1]; 342 case ACPI_FDC_DISKETTE_TYPE5: 343 case ACPI_FDC_DISKETTE_TYPE6: 344 case ACPI_FDC_DISKETTE_144M: 345 return &fdc_acpi_fdtypes[0]; 346 case ACPI_FDC_DISKETTE_360K: 347 return &fdc_acpi_fdtypes[3]; 348 case ACPI_FDC_DISKETTE_720K: 349 return &fdc_acpi_fdtypes[4]; 350 default: 351 #ifdef ACPI_FDC_DEBUG 352 printf("%s: drive %d: unknown device type 0x%x\n", 353 fdc, drive, type); 354 #endif 355 return NULL; 356 } 357 } 358
Indexes created Thu Sep 25 16:09:42 GMT 2025