fdc_acpi.c revision 1.32
1 /* $NetBSD: fdc_acpi.c,v 1.32 2008/02/18 06:19:50 dyoung 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 1.32 2008/02/18 06:19:50 dyoung 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 <sys/bus.h> 51 #include <sys/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(device_t, struct cfdata *, void *); 67 static void fdc_acpi_attach(device_t, device_t, 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(const 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(device_t 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(device_t parent, device_t self, void *aux) 111 { 112 struct fdc_acpi_softc *asc = device_private(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_dev(&sc->sc_dev, 137 "unable to find i/o register resource\n"); 138 goto out; 139 } 140 141 /* find our IRQ */ 142 irq = acpi_res_irq(&res, 0); 143 if (irq == NULL) { 144 aprint_error_dev(&sc->sc_dev, "unable to find irq resource\n"); 145 goto out; 146 } 147 148 /* find our DRQ */ 149 drq = acpi_res_drq(&res, 0); 150 if (drq == NULL) { 151 aprint_error_dev(&sc->sc_dev, "unable to find drq resource\n"); 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 aprint_error_dev(&sc->sc_dev, "can't map i/o space\n"); 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 aprint_error_dev(&sc->sc_dev, 171 "unable to subregion i/o space\n"); 172 goto out; 173 } 174 break; 175 default: 176 aprint_error_dev(&sc->sc_dev, 177 "unknown size: %d of io mapping\n", 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 aprint_error_dev(&sc->sc_dev, 190 "unable to force map ctl i/o space\n"); 191 goto out; 192 } 193 aprint_verbose_dev(&sc->sc_dev, 194 "ctl io %x did't probe. Forced attach\n", 195 io->ar_base + io->ar_length + 1); 196 } else { 197 if (bus_space_map(sc->sc_iot, ctlio->ar_base, ctlio->ar_length, 198 0, &sc->sc_fdctlioh)) { 199 aprint_error_dev(&sc->sc_dev, 200 "unable to map ctl i/o space\n"); 201 goto out; 202 } 203 } 204 205 sc->sc_ih = isa_intr_establish(aa->aa_ic, irq->ar_irq, 206 (irq->ar_type == ACPI_EDGE_SENSITIVE) ? IST_EDGE : IST_LEVEL, 207 IPL_BIO, fdcintr, sc); 208 209 /* Setup direct configuration of floppy drives */ 210 sc->sc_present = fdc_acpi_enumerate(asc); 211 if (sc->sc_present >= 0) { 212 sc->sc_known = 1; 213 fdc_acpi_getknownfds(asc); 214 } else { 215 /* 216 * XXX if there is no _FDE control method, attempt to 217 * probe without pnp 218 */ 219 #ifdef ACPI_FDC_DEBUG 220 aprint_debug_dev(&sc->sc_dev, 221 "unable to enumerate, attempting normal probe\n"); 222 #endif 223 } 224 225 fdcattach(sc); 226 227 out: 228 acpi_resource_cleanup(&res); 229 } 230 231 static int 232 fdc_acpi_enumerate(struct fdc_acpi_softc *asc) 233 { 234 struct fdc_softc *sc = &asc->sc_fdc; 235 ACPI_OBJECT *fde; 236 ACPI_BUFFER abuf; 237 ACPI_STATUS rv; 238 UINT32 *p; 239 int i, drives = -1; 240 241 rv = acpi_eval_struct(asc->sc_node->ad_handle, "_FDE", &abuf); 242 if (ACPI_FAILURE(rv)) { 243 #ifdef ACPI_FDC_DEBUG 244 aprint_normal_dev(&sc->sc_dev, "failed to evaluate _FDE: %s\n", 245 AcpiFormatException(rv)); 246 #endif 247 return drives; 248 } 249 fde = (ACPI_OBJECT *)abuf.Pointer; 250 if (fde->Type != ACPI_TYPE_BUFFER) { 251 aprint_error_dev(&sc->sc_dev, "expected BUFFER, got %d\n", 252 fde->Type); 253 goto out; 254 } 255 if (fde->Buffer.Length < 5 * sizeof(UINT32)) { 256 aprint_error_dev(&sc->sc_dev, 257 "expected buffer len of %lu, got %d\n", 258 (unsigned long)(5 * sizeof(UINT32)), fde->Buffer.Length); 259 goto out; 260 } 261 262 p = (UINT32 *) fde->Buffer.Pointer; 263 264 /* 265 * Indexes 0 through 3 are each UINT32 booleans. True if a drive 266 * is present. 267 */ 268 drives = 0; 269 for (i = 0; i < 4; i++) { 270 if (p[i]) drives |= (1 << i); 271 #ifdef ACPI_FDC_DEBUG 272 aprint_normal_dev(&sc->sc_dev, "drive %d %sattached\n", i, 273 p[i] ? "" : "not "); 274 #endif 275 } 276 277 /* 278 * p[4] reports tape presence. Possible values: 279 * 0 - Unknown if device is present 280 * 1 - Device is present 281 * 2 - Device is never present 282 * >2 - Reserved 283 * 284 * we don't currently use this. 285 */ 286 287 out: 288 AcpiOsFree(abuf.Pointer); 289 return drives; 290 } 291 292 static void 293 fdc_acpi_getknownfds(struct fdc_acpi_softc *asc) 294 { 295 struct fdc_softc *sc = &asc->sc_fdc; 296 ACPI_OBJECT *fdi, *e; 297 ACPI_BUFFER abuf; 298 ACPI_STATUS rv; 299 int i; 300 301 for (i = 0; i < 4; i++) { 302 if ((sc->sc_present & (1 << i)) == 0) 303 continue; 304 rv = acpi_eval_struct(asc->sc_node->ad_handle, "_FDI", &abuf); 305 if (ACPI_FAILURE(rv)) { 306 #ifdef ACPI_FDC_DEBUG 307 aprint_normal_dev(&sc->sc_dev, 308 "failed to evaluate _FDI: %s on drive %d\n", 309 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_dev(&sc->sc_dev, 318 "expected PACKAGE, got %d\n", fdi->Type); 319 goto out; 320 } 321 e = fdi->Package.Elements; 322 sc->sc_knownfds[i] = fdc_acpi_nvtotype( 323 device_xname(&sc->sc_dev), 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(const char *fdc, 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 Tue Sep 23 23:09:58 GMT 2025