fdc_acpi.c revision 1.27.2.1
1 /* $NetBSD: fdc_acpi.c,v 1.27.2.1 2006/03/01 09:28:11 yamt 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 1.27.2.1 2006/03/01 09:28:11 yamt 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, struct cfdata *match, void *aux) 97 { 98 struct acpi_attach_args *aa = aux; 99 100 if (aa->aa_node->ad_type != ACPI_TYPE_DEVICE) 101 return 0; 102 103 return acpi_match_hid(aa->aa_node->ad_devinfo, fdc_acpi_ids); 104 } 105 106 /* 107 * fdc_acpi_attach: autoconf(9) attach routine 108 */ 109 static void 110 fdc_acpi_attach(struct device *parent, struct device *self, void *aux) 111 { 112 struct fdc_acpi_softc *asc = (struct fdc_acpi_softc *)self; 113 struct fdc_softc *sc = &asc->sc_fdc; 114 struct acpi_attach_args *aa = aux; 115 struct acpi_io *io, *ctlio; 116 struct acpi_irq *irq; 117 struct acpi_drq *drq; 118 struct acpi_resources res; 119 ACPI_STATUS rv; 120 121 aprint_naive("\n"); 122 aprint_normal("\n"); 123 124 sc->sc_ic = aa->aa_ic; 125 asc->sc_node = aa->aa_node; 126 127 /* parse resources */ 128 rv = acpi_resource_parse(&sc->sc_dev, aa->aa_node->ad_handle, "_CRS", 129 &res, &acpi_resource_parse_ops_default); 130 if (ACPI_FAILURE(rv)) 131 return; 132 133 /* find our i/o registers */ 134 io = acpi_res_io(&res, 0); 135 if (io == NULL) { 136 aprint_error("%s: unable to find i/o register resource\n", 137 sc->sc_dev.dv_xname); 138 goto out; 139 } 140 141 /* find our IRQ */ 142 irq = acpi_res_irq(&res, 0); 143 if (irq == NULL) { 144 aprint_error("%s: unable to find irq resource\n", 145 sc->sc_dev.dv_xname); 146 goto out; 147 } 148 149 /* find our DRQ */ 150 drq = acpi_res_drq(&res, 0); 151 if (drq == NULL) { 152 aprint_error("%s: unable to find drq resource\n", 153 sc->sc_dev.dv_xname); 154 goto out; 155 } 156 sc->sc_drq = drq->ar_drq; 157 158 sc->sc_iot = aa->aa_iot; 159 if (bus_space_map(sc->sc_iot, io->ar_base, io->ar_length, 160 0, &asc->sc_baseioh)) { 161 aprint_error("%s: can't map i/o space\n", sc->sc_dev.dv_xname); 162 goto out; 163 } 164 165 switch (io->ar_length) { 166 case 4: 167 sc->sc_ioh = asc->sc_baseioh; 168 break; 169 case 6: 170 if (bus_space_subregion(sc->sc_iot, asc->sc_baseioh, 2, 4, 171 &sc->sc_ioh)) { 172 aprint_error("%s: unable to subregion i/o space\n", 173 sc->sc_dev.dv_xname); 174 goto out; 175 } 176 break; 177 default: 178 aprint_error("%s: unknown size: %d of io mapping\n", 179 sc->sc_dev.dv_xname, io->ar_length); 180 goto out; 181 } 182 183 /* 184 * omitting the controller I/O port. (One has to exist for there to 185 * be a working fdc). Just try and force the mapping in. 186 */ 187 ctlio = acpi_res_io(&res, 1); 188 if (ctlio == NULL) { 189 if (bus_space_map(sc->sc_iot, io->ar_base + io->ar_length + 1, 190 1, 0, &sc->sc_fdctlioh)) { 191 aprint_error("%s: unable to force map ctl i/o space\n", 192 sc->sc_dev.dv_xname); 193 goto out; 194 } 195 aprint_verbose("%s: ctl io %x did't probe. Forced attach\n", 196 sc->sc_dev.dv_xname, io->ar_base + io->ar_length + 1); 197 } else { 198 if (bus_space_map(sc->sc_iot, ctlio->ar_base, ctlio->ar_length, 199 0, &sc->sc_fdctlioh)) { 200 aprint_error("%s: unable to map ctl i/o space\n", 201 sc->sc_dev.dv_xname); 202 goto out; 203 } 204 } 205 206 sc->sc_ih = isa_intr_establish(aa->aa_ic, irq->ar_irq, 207 (irq->ar_type == ACPI_EDGE_SENSITIVE) ? IST_EDGE : IST_LEVEL, 208 IPL_BIO, fdcintr, sc); 209 210 /* Setup direct configuration of floppy drives */ 211 sc->sc_present = fdc_acpi_enumerate(asc); 212 if (sc->sc_present >= 0) { 213 sc->sc_known = 1; 214 fdc_acpi_getknownfds(asc); 215 } else { 216 /* 217 * XXX if there is no _FDE control method, attempt to 218 * probe without pnp 219 */ 220 #ifdef ACPI_FDC_DEBUG 221 aprint_debug("%s: unable to enumerate, attempting normal probe\n", 222 sc->sc_dev.dv_xname); 223 #endif 224 } 225 226 fdcattach(sc); 227 228 out: 229 acpi_resource_cleanup(&res); 230 } 231 232 static int 233 fdc_acpi_enumerate(struct fdc_acpi_softc *asc) 234 { 235 struct fdc_softc *sc = &asc->sc_fdc; 236 ACPI_OBJECT *fde; 237 ACPI_BUFFER abuf; 238 ACPI_STATUS rv; 239 UINT32 *p; 240 int i, drives = -1; 241 242 rv = acpi_eval_struct(asc->sc_node->ad_handle, "_FDE", &abuf); 243 if (ACPI_FAILURE(rv)) { 244 #ifdef ACPI_FDC_DEBUG 245 aprint_normal("%s: failed to evaluate _FDE: %s\n", 246 sc->sc_dev.dv_xname, AcpiFormatException(rv)); 247 #endif 248 return drives; 249 } 250 fde = (ACPI_OBJECT *)abuf.Pointer; 251 if (fde->Type != ACPI_TYPE_BUFFER) { 252 aprint_error("%s: expected BUFFER, got %d\n", sc->sc_dev.dv_xname, 253 fde->Type); 254 goto out; 255 } 256 if (fde->Buffer.Length < 5 * sizeof(UINT32)) { 257 aprint_error("%s: expected buffer len of %lu, got %d\n", 258 sc->sc_dev.dv_xname, 259 (unsigned long)(5 * sizeof(UINT32)), fde->Buffer.Length); 260 goto out; 261 } 262 263 p = (UINT32 *) fde->Buffer.Pointer; 264 265 /* 266 * Indexes 0 through 3 are each UINT32 booleans. True if a drive 267 * is present. 268 */ 269 drives = 0; 270 for (i = 0; i < 4; i++) { 271 if (p[i]) drives |= (1 << i); 272 #ifdef ACPI_FDC_DEBUG 273 aprint_normal("%s: drive %d %sattached\n", sc->sc_dev.dv_xname, i, 274 p[i] ? "" : "not "); 275 #endif 276 } 277 278 /* 279 * p[4] reports tape presence. Possible values: 280 * 0 - Unknown if device is present 281 * 1 - Device is present 282 * 2 - Device is never present 283 * >2 - Reserved 284 * 285 * we don't currently use this. 286 */ 287 288 out: 289 AcpiOsFree(abuf.Pointer); 290 return drives; 291 } 292 293 static void 294 fdc_acpi_getknownfds(struct fdc_acpi_softc *asc) 295 { 296 struct fdc_softc *sc = &asc->sc_fdc; 297 ACPI_OBJECT *fdi, *e; 298 ACPI_BUFFER abuf; 299 ACPI_STATUS rv; 300 int i; 301 302 for (i = 0; i < 4; i++) { 303 if ((sc->sc_present & (1 << i)) == 0) 304 continue; 305 rv = acpi_eval_struct(asc->sc_node->ad_handle, "_FDI", &abuf); 306 if (ACPI_FAILURE(rv)) { 307 #ifdef ACPI_FDC_DEBUG 308 aprint_normal("%s: failed to evaluate _FDI: %s on drive %d\n", 309 sc->sc_dev.dv_xname, AcpiFormatException(rv), i); 310 #endif 311 /* XXX if _FDI fails, assume 1.44MB floppy */ 312 sc->sc_knownfds[i] = &fdc_acpi_fdtypes[0]; 313 continue; 314 } 315 fdi = (ACPI_OBJECT *)abuf.Pointer; 316 if (fdi->Type != ACPI_TYPE_PACKAGE) { 317 aprint_error("%s: expected PACKAGE, got %d\n", 318 sc->sc_dev.dv_xname, fdi->Type); 319 goto out; 320 } 321 e = fdi->Package.Elements; 322 sc->sc_knownfds[i] = fdc_acpi_nvtotype(sc->sc_dev.dv_xname, 323 e[1].Integer.Value, e[0].Integer.Value); 324 325 /* if fdc_acpi_nvtotype returns NULL, don't attach drive */ 326 if (!sc->sc_knownfds[i]) 327 sc->sc_present &= ~(1 << i); 328 329 out: 330 AcpiOsFree(abuf.Pointer); 331 } 332 } 333 334 static const struct fd_type * 335 fdc_acpi_nvtotype(char *fdc, int nvraminfo, int drive) 336 { 337 int type; 338 339 type = (drive == 0 ? nvraminfo : nvraminfo << 4) & 0xf0; 340 switch (type) { 341 case ACPI_FDC_DISKETTE_NONE: 342 return NULL; 343 case ACPI_FDC_DISKETTE_12M: 344 return &fdc_acpi_fdtypes[1]; 345 case ACPI_FDC_DISKETTE_TYPE5: 346 case ACPI_FDC_DISKETTE_TYPE6: 347 case ACPI_FDC_DISKETTE_144M: 348 return &fdc_acpi_fdtypes[0]; 349 case ACPI_FDC_DISKETTE_360K: 350 return &fdc_acpi_fdtypes[3]; 351 case ACPI_FDC_DISKETTE_720K: 352 return &fdc_acpi_fdtypes[4]; 353 default: 354 #ifdef ACPI_FDC_DEBUG 355 aprint_normal("%s: drive %d: unknown device type 0x%x\n", 356 fdc, drive, type); 357 #endif 358 return NULL; 359 } 360 } 361
Indexes created Thu Oct 02 14:10:14 GMT 2025