fdc_acpi.c revision 1.29
1 /* $NetBSD: fdc_acpi.c,v 1.29 2006/10/12 01:30:54 christos 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 1.29 2006/10/12 01:30:54 christos 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/bufq.h> 44 #include <sys/queue.h> 45 #include <sys/disk.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 static int fdc_acpi_match(struct device *, struct cfdata *, void *); 67 static 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 "PNP07??", /* PC standard floppy disk controller */ 89 NULL 90 }; 91 92 /* 93 * fdc_acpi_match: autoconf(9) match routine 94 */ 95 static int 96 fdc_acpi_match(struct device *parent __unused, struct cfdata *match __unused, 97 void *aux) 98 { 99 struct acpi_attach_args *aa = aux; 100 101 if (aa->aa_node->ad_type != ACPI_TYPE_DEVICE) 102 return 0; 103 104 return acpi_match_hid(aa->aa_node->ad_devinfo, fdc_acpi_ids); 105 } 106 107 /* 108 * fdc_acpi_attach: autoconf(9) attach routine 109 */ 110 static void 111 fdc_acpi_attach(struct device *parent __unused, struct device *self, void *aux) 112 { 113 struct fdc_acpi_softc *asc = (struct fdc_acpi_softc *)self; 114 struct fdc_softc *sc = &asc->sc_fdc; 115 struct acpi_attach_args *aa = aux; 116 struct acpi_io *io, *ctlio; 117 struct acpi_irq *irq; 118 struct acpi_drq *drq; 119 struct acpi_resources res; 120 ACPI_STATUS rv; 121 122 aprint_naive("\n"); 123 aprint_normal("\n"); 124 125 sc->sc_ic = aa->aa_ic; 126 asc->sc_node = aa->aa_node; 127 128 /* parse resources */ 129 rv = acpi_resource_parse(&sc->sc_dev, aa->aa_node->ad_handle, "_CRS", 130 &res, &acpi_resource_parse_ops_default); 131 if (ACPI_FAILURE(rv)) 132 return; 133 134 /* find our i/o registers */ 135 io = acpi_res_io(&res, 0); 136 if (io == NULL) { 137 aprint_error("%s: unable to find i/o register resource\n", 138 sc->sc_dev.dv_xname); 139 goto out; 140 } 141 142 /* find our IRQ */ 143 irq = acpi_res_irq(&res, 0); 144 if (irq == NULL) { 145 aprint_error("%s: unable to find irq resource\n", 146 sc->sc_dev.dv_xname); 147 goto out; 148 } 149 150 /* find our DRQ */ 151 drq = acpi_res_drq(&res, 0); 152 if (drq == NULL) { 153 aprint_error("%s: unable to find drq resource\n", 154 sc->sc_dev.dv_xname); 155 goto out; 156 } 157 sc->sc_drq = drq->ar_drq; 158 159 sc->sc_iot = aa->aa_iot; 160 if (bus_space_map(sc->sc_iot, io->ar_base, io->ar_length, 161 0, &asc->sc_baseioh)) { 162 aprint_error("%s: can't map i/o space\n", sc->sc_dev.dv_xname); 163 goto out; 164 } 165 166 switch (io->ar_length) { 167 case 4: 168 sc->sc_ioh = asc->sc_baseioh; 169 break; 170 case 6: 171 if (bus_space_subregion(sc->sc_iot, asc->sc_baseioh, 2, 4, 172 &sc->sc_ioh)) { 173 aprint_error("%s: unable to subregion i/o space\n", 174 sc->sc_dev.dv_xname); 175 goto out; 176 } 177 break; 178 default: 179 aprint_error("%s: unknown size: %d of io mapping\n", 180 sc->sc_dev.dv_xname, io->ar_length); 181 goto out; 182 } 183 184 /* 185 * omitting the controller I/O port. (One has to exist for there to 186 * be a working fdc). Just try and force the mapping in. 187 */ 188 ctlio = acpi_res_io(&res, 1); 189 if (ctlio == NULL) { 190 if (bus_space_map(sc->sc_iot, io->ar_base + io->ar_length + 1, 191 1, 0, &sc->sc_fdctlioh)) { 192 aprint_error("%s: unable to force map ctl i/o space\n", 193 sc->sc_dev.dv_xname); 194 goto out; 195 } 196 aprint_verbose("%s: ctl io %x did't probe. Forced attach\n", 197 sc->sc_dev.dv_xname, io->ar_base + io->ar_length + 1); 198 } else { 199 if (bus_space_map(sc->sc_iot, ctlio->ar_base, ctlio->ar_length, 200 0, &sc->sc_fdctlioh)) { 201 aprint_error("%s: unable to map ctl i/o space\n", 202 sc->sc_dev.dv_xname); 203 goto out; 204 } 205 } 206 207 sc->sc_ih = isa_intr_establish(aa->aa_ic, irq->ar_irq, 208 (irq->ar_type == ACPI_EDGE_SENSITIVE) ? IST_EDGE : IST_LEVEL, 209 IPL_BIO, fdcintr, sc); 210 211 /* Setup direct configuration of floppy drives */ 212 sc->sc_present = fdc_acpi_enumerate(asc); 213 if (sc->sc_present >= 0) { 214 sc->sc_known = 1; 215 fdc_acpi_getknownfds(asc); 216 } else { 217 /* 218 * XXX if there is no _FDE control method, attempt to 219 * probe without pnp 220 */ 221 #ifdef ACPI_FDC_DEBUG 222 aprint_debug("%s: unable to enumerate, attempting normal probe\n", 223 sc->sc_dev.dv_xname); 224 #endif 225 } 226 227 fdcattach(sc); 228 229 out: 230 acpi_resource_cleanup(&res); 231 } 232 233 static int 234 fdc_acpi_enumerate(struct fdc_acpi_softc *asc) 235 { 236 struct fdc_softc *sc = &asc->sc_fdc; 237 ACPI_OBJECT *fde; 238 ACPI_BUFFER abuf; 239 ACPI_STATUS rv; 240 UINT32 *p; 241 int i, drives = -1; 242 243 rv = acpi_eval_struct(asc->sc_node->ad_handle, "_FDE", &abuf); 244 if (ACPI_FAILURE(rv)) { 245 #ifdef ACPI_FDC_DEBUG 246 aprint_normal("%s: failed to evaluate _FDE: %s\n", 247 sc->sc_dev.dv_xname, AcpiFormatException(rv)); 248 #endif 249 return drives; 250 } 251 fde = (ACPI_OBJECT *)abuf.Pointer; 252 if (fde->Type != ACPI_TYPE_BUFFER) { 253 aprint_error("%s: expected BUFFER, got %d\n", sc->sc_dev.dv_xname, 254 fde->Type); 255 goto out; 256 } 257 if (fde->Buffer.Length < 5 * sizeof(UINT32)) { 258 aprint_error("%s: expected buffer len of %lu, got %d\n", 259 sc->sc_dev.dv_xname, 260 (unsigned long)(5 * sizeof(UINT32)), fde->Buffer.Length); 261 goto out; 262 } 263 264 p = (UINT32 *) fde->Buffer.Pointer; 265 266 /* 267 * Indexes 0 through 3 are each UINT32 booleans. True if a drive 268 * is present. 269 */ 270 drives = 0; 271 for (i = 0; i < 4; i++) { 272 if (p[i]) drives |= (1 << i); 273 #ifdef ACPI_FDC_DEBUG 274 aprint_normal("%s: drive %d %sattached\n", sc->sc_dev.dv_xname, i, 275 p[i] ? "" : "not "); 276 #endif 277 } 278 279 /* 280 * p[4] reports tape presence. Possible values: 281 * 0 - Unknown if device is present 282 * 1 - Device is present 283 * 2 - Device is never present 284 * >2 - Reserved 285 * 286 * we don't currently use this. 287 */ 288 289 out: 290 AcpiOsFree(abuf.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 abuf; 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", &abuf); 307 if (ACPI_FAILURE(rv)) { 308 #ifdef ACPI_FDC_DEBUG 309 aprint_normal("%s: failed to evaluate _FDI: %s on drive %d\n", 310 sc->sc_dev.dv_xname, AcpiFormatException(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 *)abuf.Pointer; 317 if (fdi->Type != ACPI_TYPE_PACKAGE) { 318 aprint_error("%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); 325 326 /* if fdc_acpi_nvtotype returns NULL, don't attach drive */ 327 if (!sc->sc_knownfds[i]) 328 sc->sc_present &= ~(1 << i); 329 330 out: 331 AcpiOsFree(abuf.Pointer); 332 } 333 } 334 335 static const struct fd_type * 336 fdc_acpi_nvtotype(char *fdc __unused, int nvraminfo, int drive) 337 { 338 int type; 339 340 type = (drive == 0 ? nvraminfo : nvraminfo << 4) & 0xf0; 341 switch (type) { 342 case ACPI_FDC_DISKETTE_NONE: 343 return NULL; 344 case ACPI_FDC_DISKETTE_12M: 345 return &fdc_acpi_fdtypes[1]; 346 case ACPI_FDC_DISKETTE_TYPE5: 347 case ACPI_FDC_DISKETTE_TYPE6: 348 case ACPI_FDC_DISKETTE_144M: 349 return &fdc_acpi_fdtypes[0]; 350 case ACPI_FDC_DISKETTE_360K: 351 return &fdc_acpi_fdtypes[3]; 352 case ACPI_FDC_DISKETTE_720K: 353 return &fdc_acpi_fdtypes[4]; 354 default: 355 #ifdef ACPI_FDC_DEBUG 356 aprint_normal("%s: drive %d: unknown device type 0x%x\n", 357 fdc, drive, type); 358 #endif 359 return NULL; 360 } 361 } 362
Indexes created Wed Sep 24 02:09:48 GMT 2025