fdc_acpi.c revision 1.44
1 /* $NetBSD: fdc_acpi.c,v 1.44 2020/12/06 12:23:13 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 1.44 2020/12/06 12:23:13 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, (uint64_t)aa->aa_node->ad_handle, 185 IPL_BIO, false, fdcintr, sc, device_xname(self)); 186 if (sc->sc_ih == NULL) { 187 aprint_error_dev(sc->sc_dev, "unable to establish interrupt\n"); 188 goto out; 189 } 190 191 /* Setup direct configuration of floppy drives */ 192 sc->sc_present = fdc_acpi_enumerate(asc); 193 if (sc->sc_present >= 0) { 194 sc->sc_known = 1; 195 fdc_acpi_getknownfds(asc); 196 } else { 197 /* 198 * XXX if there is no _FDE control method, attempt to 199 * probe without pnp 200 */ 201 aprint_debug_dev(sc->sc_dev, 202 "unable to enumerate, attempting normal probe\n"); 203 } 204 205 fdcattach(sc); 206 207 out: 208 acpi_resource_cleanup(&res); 209 } 210 211 static int 212 fdc_acpi_enumerate(struct fdc_acpi_softc *asc) 213 { 214 struct fdc_softc *sc = &asc->sc_fdc; 215 ACPI_OBJECT *fde; 216 ACPI_BUFFER abuf; 217 ACPI_STATUS rv; 218 uint32_t *p; 219 int i, drives = -1; 220 221 rv = acpi_eval_struct(asc->sc_node->ad_handle, "_FDE", &abuf); 222 223 if (ACPI_FAILURE(rv)) { 224 aprint_normal_dev(sc->sc_dev, "failed to evaluate _FDE: %s\n", 225 AcpiFormatException(rv)); 226 return drives; 227 } 228 fde = abuf.Pointer; 229 if (fde->Type != ACPI_TYPE_BUFFER) { 230 aprint_error_dev(sc->sc_dev, "expected BUFFER, got %u\n", 231 fde->Type); 232 goto out; 233 } 234 if (fde->Buffer.Length < 5 * sizeof(uint32_t)) { 235 aprint_error_dev(sc->sc_dev, 236 "expected buffer len of %lu, got %u\n", 237 (unsigned long)(5 * sizeof(uint32_t)), fde->Buffer.Length); 238 goto out; 239 } 240 241 p = (uint32_t *)fde->Buffer.Pointer; 242 243 /* 244 * Indexes 0 through 3 are each uint32_t booleans. True if a drive 245 * is present. 246 */ 247 drives = 0; 248 for (i = 0; i < 4; i++) { 249 if (p[i]) drives |= (1 << i); 250 aprint_normal_dev(sc->sc_dev, "drive %d %sattached\n", i, 251 p[i] ? "" : "not "); 252 } 253 254 /* 255 * p[4] reports tape presence. Possible values: 256 * 0 - Unknown if device is present 257 * 1 - Device is present 258 * 2 - Device is never present 259 * >2 - Reserved 260 * 261 * we don't currently use this. 262 */ 263 264 out: 265 ACPI_FREE(abuf.Pointer); 266 return drives; 267 } 268 269 static void 270 fdc_acpi_getknownfds(struct fdc_acpi_softc *asc) 271 { 272 struct fdc_softc *sc = &asc->sc_fdc; 273 ACPI_OBJECT *fdi, *e; 274 ACPI_BUFFER abuf; 275 ACPI_STATUS rv; 276 int i; 277 278 for (i = 0; i < 4; i++) { 279 if ((sc->sc_present & (1 << i)) == 0) 280 continue; 281 rv = acpi_eval_struct(asc->sc_node->ad_handle, "_FDI", &abuf); 282 if (ACPI_FAILURE(rv)) { 283 aprint_normal_dev(sc->sc_dev, 284 "failed to evaluate _FDI: %s on drive %d\n", 285 AcpiFormatException(rv), i); 286 /* XXX if _FDI fails, assume 1.44MB floppy */ 287 sc->sc_knownfds[i] = &fdc_acpi_fdtypes[0]; 288 continue; 289 } 290 fdi = abuf.Pointer; 291 if (fdi->Type != ACPI_TYPE_PACKAGE) { 292 aprint_error_dev(sc->sc_dev, 293 "expected PACKAGE, got %u\n", fdi->Type); 294 goto out; 295 } 296 e = fdi->Package.Elements; 297 sc->sc_knownfds[i] = fdc_acpi_nvtotype( 298 device_xname(sc->sc_dev), 299 e[1].Integer.Value, e[0].Integer.Value); 300 301 /* if fdc_acpi_nvtotype returns NULL, don't attach drive */ 302 if (!sc->sc_knownfds[i]) 303 sc->sc_present &= ~(1 << i); 304 305 out: 306 ACPI_FREE(abuf.Pointer); 307 } 308 } 309 310 static const struct fd_type * 311 fdc_acpi_nvtotype(const char *fdc, int nvraminfo, int drive) 312 { 313 int type; 314 315 type = (drive == 0 ? nvraminfo : nvraminfo << 4) & 0xf0; 316 switch (type) { 317 case ACPI_FDC_DISKETTE_NONE: 318 return NULL; 319 case ACPI_FDC_DISKETTE_12M: 320 return &fdc_acpi_fdtypes[1]; 321 case ACPI_FDC_DISKETTE_TYPE5: 322 case ACPI_FDC_DISKETTE_TYPE6: 323 case ACPI_FDC_DISKETTE_144M: 324 return &fdc_acpi_fdtypes[0]; 325 case ACPI_FDC_DISKETTE_360K: 326 return &fdc_acpi_fdtypes[3]; 327 case ACPI_FDC_DISKETTE_720K: 328 return &fdc_acpi_fdtypes[4]; 329 default: 330 aprint_normal("%s: drive %d: unknown device type 0x%x\n", 331 fdc, drive, type); 332 return NULL; 333 } 334 } 335
Indexes created Tue Sep 23 07:09:52 GMT 2025