fdc_acpi.c revision 1.45
1 /* $NetBSD: fdc_acpi.c,v 1.45 2020/12/07 10:02:51 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 1.45 2020/12/07 10:02:51 jmcneill Exp $"); 35 36 #include <sys/param.h> 37 #include <sys/device.h> 38 #include <sys/disk.h> 39 #include <sys/systm.h> 40 41 #include <dev/acpi/acpireg.h> 42 #include <dev/acpi/acpivar.h> 43 #include <dev/acpi/acpi_intr.h> 44 45 #include <dev/isa/isadmavar.h> 46 #include <dev/isa/fdcvar.h> 47 #include <dev/isa/fdvar.h> 48 #include <dev/isa/fdreg.h> 49 50 #include <dev/acpi/fdc_acpireg.h> 51 52 #define _COMPONENT ACPI_RESOURCE_COMPONENT 53 ACPI_MODULE_NAME ("fdc_acpi") 54 55 static int fdc_acpi_match(device_t, cfdata_t, void *); 56 static void fdc_acpi_attach(device_t, device_t, void *); 57 58 struct fdc_acpi_softc { 59 struct fdc_softc sc_fdc; 60 bus_space_handle_t sc_baseioh; 61 struct acpi_devnode *sc_node; /* ACPI devnode */ 62 }; 63 64 static int fdc_acpi_enumerate(struct fdc_acpi_softc *); 65 static void fdc_acpi_getknownfds(struct fdc_acpi_softc *); 66 67 static const struct fd_type *fdc_acpi_nvtotype(const char *, int, int); 68 69 CFATTACH_DECL_NEW(fdc_acpi, sizeof(struct fdc_acpi_softc), fdc_acpi_match, 70 fdc_acpi_attach, NULL, NULL); 71 72 /* 73 * Supported device IDs 74 */ 75 76 static const char * const fdc_acpi_ids[] = { 77 "PNP07??", /* PC standard floppy disk controller */ 78 NULL 79 }; 80 81 /* 82 * fdc_acpi_match: autoconf(9) match routine 83 */ 84 static int 85 fdc_acpi_match(device_t parent, cfdata_t match, void *aux) 86 { 87 struct acpi_attach_args *aa = aux; 88 89 if (aa->aa_node->ad_type != ACPI_TYPE_DEVICE) 90 return 0; 91 92 return acpi_match_hid(aa->aa_node->ad_devinfo, fdc_acpi_ids); 93 } 94 95 /* 96 * fdc_acpi_attach: autoconf(9) attach routine 97 */ 98 static void 99 fdc_acpi_attach(device_t parent, device_t self, void *aux) 100 { 101 struct fdc_acpi_softc *asc = device_private(self); 102 struct fdc_softc *sc = &asc->sc_fdc; 103 struct acpi_attach_args *aa = aux; 104 struct acpi_io *io, *ctlio; 105 struct acpi_drq *drq; 106 struct acpi_resources res; 107 ACPI_STATUS rv; 108 109 sc->sc_dev = self; 110 sc->sc_ic = aa->aa_ic; 111 asc->sc_node = aa->aa_node; 112 113 /* parse resources */ 114 rv = acpi_resource_parse(sc->sc_dev, aa->aa_node->ad_handle, "_CRS", 115 &res, &acpi_resource_parse_ops_default); 116 if (ACPI_FAILURE(rv)) 117 return; 118 119 /* find our i/o registers */ 120 io = acpi_res_io(&res, 0); 121 if (io == NULL) { 122 aprint_error_dev(sc->sc_dev, 123 "unable to find i/o register resource\n"); 124 goto out; 125 } 126 127 /* find our DRQ */ 128 drq = acpi_res_drq(&res, 0); 129 if (drq == NULL) { 130 aprint_error_dev(sc->sc_dev, "unable to find drq resource\n"); 131 goto out; 132 } 133 sc->sc_drq = drq->ar_drq; 134 135 sc->sc_iot = aa->aa_iot; 136 if (bus_space_map(sc->sc_iot, io->ar_base, io->ar_length, 137 0, &asc->sc_baseioh)) { 138 aprint_error_dev(sc->sc_dev, "can't map i/o space\n"); 139 goto out; 140 } 141 142 switch (io->ar_length) { 143 case 4: 144 sc->sc_ioh = asc->sc_baseioh; 145 break; 146 case 6: 147 if (bus_space_subregion(sc->sc_iot, asc->sc_baseioh, 2, 4, 148 &sc->sc_ioh)) { 149 aprint_error_dev(sc->sc_dev, 150 "unable to subregion i/o space\n"); 151 goto out; 152 } 153 break; 154 default: 155 aprint_error_dev(sc->sc_dev, 156 "unknown size: %d of io mapping\n", io->ar_length); 157 goto out; 158 } 159 160 /* 161 * omitting the controller I/O port. (One has to exist for there to 162 * be a working fdc). Just try and force the mapping in. 163 */ 164 ctlio = acpi_res_io(&res, 1); 165 if (ctlio == NULL) { 166 if (bus_space_map(sc->sc_iot, io->ar_base + io->ar_length + 1, 167 1, 0, &sc->sc_fdctlioh)) { 168 aprint_error_dev(sc->sc_dev, 169 "unable to force map ctl i/o space\n"); 170 goto out; 171 } 172 aprint_verbose_dev(sc->sc_dev, 173 "ctl io %x did't probe. Forced attach\n", 174 io->ar_base + io->ar_length + 1); 175 } else { 176 if (bus_space_map(sc->sc_iot, ctlio->ar_base, ctlio->ar_length, 177 0, &sc->sc_fdctlioh)) { 178 aprint_error_dev(sc->sc_dev, 179 "unable to map ctl i/o space\n"); 180 goto out; 181 } 182 } 183 184 sc->sc_ih = acpi_intr_establish(self, 185 (uint64_t)(uintptr_t)aa->aa_node->ad_handle, 186 IPL_BIO, false, fdcintr, sc, device_xname(self)); 187 if (sc->sc_ih == NULL) { 188 aprint_error_dev(sc->sc_dev, "unable to establish interrupt\n"); 189 goto out; 190 } 191 192 /* Setup direct configuration of floppy drives */ 193 sc->sc_present = fdc_acpi_enumerate(asc); 194 if (sc->sc_present >= 0) { 195 sc->sc_known = 1; 196 fdc_acpi_getknownfds(asc); 197 } else { 198 /* 199 * XXX if there is no _FDE control method, attempt to 200 * probe without pnp 201 */ 202 aprint_debug_dev(sc->sc_dev, 203 "unable to enumerate, attempting normal probe\n"); 204 } 205 206 fdcattach(sc); 207 208 out: 209 acpi_resource_cleanup(&res); 210 } 211 212 static int 213 fdc_acpi_enumerate(struct fdc_acpi_softc *asc) 214 { 215 struct fdc_softc *sc = &asc->sc_fdc; 216 ACPI_OBJECT *fde; 217 ACPI_BUFFER abuf; 218 ACPI_STATUS rv; 219 uint32_t *p; 220 int i, drives = -1; 221 222 rv = acpi_eval_struct(asc->sc_node->ad_handle, "_FDE", &abuf); 223 224 if (ACPI_FAILURE(rv)) { 225 aprint_normal_dev(sc->sc_dev, "failed to evaluate _FDE: %s\n", 226 AcpiFormatException(rv)); 227 return drives; 228 } 229 fde = abuf.Pointer; 230 if (fde->Type != ACPI_TYPE_BUFFER) { 231 aprint_error_dev(sc->sc_dev, "expected BUFFER, got %u\n", 232 fde->Type); 233 goto out; 234 } 235 if (fde->Buffer.Length < 5 * sizeof(uint32_t)) { 236 aprint_error_dev(sc->sc_dev, 237 "expected buffer len of %lu, got %u\n", 238 (unsigned long)(5 * sizeof(uint32_t)), fde->Buffer.Length); 239 goto out; 240 } 241 242 p = (uint32_t *)fde->Buffer.Pointer; 243 244 /* 245 * Indexes 0 through 3 are each uint32_t booleans. True if a drive 246 * is present. 247 */ 248 drives = 0; 249 for (i = 0; i < 4; i++) { 250 if (p[i]) drives |= (1 << i); 251 aprint_normal_dev(sc->sc_dev, "drive %d %sattached\n", i, 252 p[i] ? "" : "not "); 253 } 254 255 /* 256 * p[4] reports tape presence. Possible values: 257 * 0 - Unknown if device is present 258 * 1 - Device is present 259 * 2 - Device is never present 260 * >2 - Reserved 261 * 262 * we don't currently use this. 263 */ 264 265 out: 266 ACPI_FREE(abuf.Pointer); 267 return drives; 268 } 269 270 static void 271 fdc_acpi_getknownfds(struct fdc_acpi_softc *asc) 272 { 273 struct fdc_softc *sc = &asc->sc_fdc; 274 ACPI_OBJECT *fdi, *e; 275 ACPI_BUFFER abuf; 276 ACPI_STATUS rv; 277 int i; 278 279 for (i = 0; i < 4; i++) { 280 if ((sc->sc_present & (1 << i)) == 0) 281 continue; 282 rv = acpi_eval_struct(asc->sc_node->ad_handle, "_FDI", &abuf); 283 if (ACPI_FAILURE(rv)) { 284 aprint_normal_dev(sc->sc_dev, 285 "failed to evaluate _FDI: %s on drive %d\n", 286 AcpiFormatException(rv), i); 287 /* XXX if _FDI fails, assume 1.44MB floppy */ 288 sc->sc_knownfds[i] = &fdc_acpi_fdtypes[0]; 289 continue; 290 } 291 fdi = abuf.Pointer; 292 if (fdi->Type != ACPI_TYPE_PACKAGE) { 293 aprint_error_dev(sc->sc_dev, 294 "expected PACKAGE, got %u\n", fdi->Type); 295 goto out; 296 } 297 e = fdi->Package.Elements; 298 sc->sc_knownfds[i] = fdc_acpi_nvtotype( 299 device_xname(sc->sc_dev), 300 e[1].Integer.Value, e[0].Integer.Value); 301 302 /* if fdc_acpi_nvtotype returns NULL, don't attach drive */ 303 if (!sc->sc_knownfds[i]) 304 sc->sc_present &= ~(1 << i); 305 306 out: 307 ACPI_FREE(abuf.Pointer); 308 } 309 } 310 311 static const struct fd_type * 312 fdc_acpi_nvtotype(const char *fdc, int nvraminfo, int drive) 313 { 314 int type; 315 316 type = (drive == 0 ? nvraminfo : nvraminfo << 4) & 0xf0; 317 switch (type) { 318 case ACPI_FDC_DISKETTE_NONE: 319 return NULL; 320 case ACPI_FDC_DISKETTE_12M: 321 return &fdc_acpi_fdtypes[1]; 322 case ACPI_FDC_DISKETTE_TYPE5: 323 case ACPI_FDC_DISKETTE_TYPE6: 324 case ACPI_FDC_DISKETTE_144M: 325 return &fdc_acpi_fdtypes[0]; 326 case ACPI_FDC_DISKETTE_360K: 327 return &fdc_acpi_fdtypes[3]; 328 case ACPI_FDC_DISKETTE_720K: 329 return &fdc_acpi_fdtypes[4]; 330 default: 331 aprint_normal("%s: drive %d: unknown device type 0x%x\n", 332 fdc, drive, type); 333 return NULL; 334 } 335 } 336
Indexes created Wed Sep 24 22:09:59 GMT 2025