fdc_acpi.c revision 1.42.6.1
1 /* $NetBSD: fdc_acpi.c,v 1.42.6.1 2017/12/03 11:36:58 jdolecek 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 1.42.6.1 2017/12/03 11:36:58 jdolecek 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 44 #include <dev/isa/isadmavar.h> 45 #include <dev/isa/fdcvar.h> 46 #include <dev/isa/fdvar.h> 47 #include <dev/isa/fdreg.h> 48 49 #include <dev/acpi/fdc_acpireg.h> 50 51 #define _COMPONENT ACPI_RESOURCE_COMPONENT 52 ACPI_MODULE_NAME ("fdc_acpi") 53 54 static int fdc_acpi_match(device_t, cfdata_t, void *); 55 static void fdc_acpi_attach(device_t, device_t, void *); 56 57 struct fdc_acpi_softc { 58 struct fdc_softc sc_fdc; 59 bus_space_handle_t sc_baseioh; 60 struct acpi_devnode *sc_node; /* ACPI devnode */ 61 }; 62 63 static int fdc_acpi_enumerate(struct fdc_acpi_softc *); 64 static void fdc_acpi_getknownfds(struct fdc_acpi_softc *); 65 66 static const struct fd_type *fdc_acpi_nvtotype(const char *, int, int); 67 68 CFATTACH_DECL_NEW(fdc_acpi, sizeof(struct fdc_acpi_softc), fdc_acpi_match, 69 fdc_acpi_attach, NULL, NULL); 70 71 /* 72 * Supported device IDs 73 */ 74 75 static const char * const fdc_acpi_ids[] = { 76 "PNP07??", /* PC standard floppy disk controller */ 77 NULL 78 }; 79 80 /* 81 * fdc_acpi_match: autoconf(9) match routine 82 */ 83 static int 84 fdc_acpi_match(device_t parent, cfdata_t match, void *aux) 85 { 86 struct acpi_attach_args *aa = aux; 87 88 if (aa->aa_node->ad_type != ACPI_TYPE_DEVICE) 89 return 0; 90 91 return acpi_match_hid(aa->aa_node->ad_devinfo, fdc_acpi_ids); 92 } 93 94 /* 95 * fdc_acpi_attach: autoconf(9) attach routine 96 */ 97 static void 98 fdc_acpi_attach(device_t parent, device_t self, void *aux) 99 { 100 struct fdc_acpi_softc *asc = device_private(self); 101 struct fdc_softc *sc = &asc->sc_fdc; 102 struct acpi_attach_args *aa = aux; 103 struct acpi_io *io, *ctlio; 104 struct acpi_irq *irq; 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 IRQ */ 128 irq = acpi_res_irq(&res, 0); 129 if (irq == NULL) { 130 aprint_error_dev(sc->sc_dev, "unable to find irq resource\n"); 131 goto out; 132 } 133 134 /* find our DRQ */ 135 drq = acpi_res_drq(&res, 0); 136 if (drq == NULL) { 137 aprint_error_dev(sc->sc_dev, "unable to find drq resource\n"); 138 goto out; 139 } 140 sc->sc_drq = drq->ar_drq; 141 142 sc->sc_iot = aa->aa_iot; 143 if (bus_space_map(sc->sc_iot, io->ar_base, io->ar_length, 144 0, &asc->sc_baseioh)) { 145 aprint_error_dev(sc->sc_dev, "can't map i/o space\n"); 146 goto out; 147 } 148 149 switch (io->ar_length) { 150 case 4: 151 sc->sc_ioh = asc->sc_baseioh; 152 break; 153 case 6: 154 if (bus_space_subregion(sc->sc_iot, asc->sc_baseioh, 2, 4, 155 &sc->sc_ioh)) { 156 aprint_error_dev(sc->sc_dev, 157 "unable to subregion i/o space\n"); 158 goto out; 159 } 160 break; 161 default: 162 aprint_error_dev(sc->sc_dev, 163 "unknown size: %d of io mapping\n", io->ar_length); 164 goto out; 165 } 166 167 /* 168 * omitting the controller I/O port. (One has to exist for there to 169 * be a working fdc). Just try and force the mapping in. 170 */ 171 ctlio = acpi_res_io(&res, 1); 172 if (ctlio == NULL) { 173 if (bus_space_map(sc->sc_iot, io->ar_base + io->ar_length + 1, 174 1, 0, &sc->sc_fdctlioh)) { 175 aprint_error_dev(sc->sc_dev, 176 "unable to force map ctl i/o space\n"); 177 goto out; 178 } 179 aprint_verbose_dev(sc->sc_dev, 180 "ctl io %x did't probe. Forced attach\n", 181 io->ar_base + io->ar_length + 1); 182 } else { 183 if (bus_space_map(sc->sc_iot, ctlio->ar_base, ctlio->ar_length, 184 0, &sc->sc_fdctlioh)) { 185 aprint_error_dev(sc->sc_dev, 186 "unable to map ctl i/o space\n"); 187 goto out; 188 } 189 } 190 191 sc->sc_ih = isa_intr_establish(aa->aa_ic, irq->ar_irq, 192 (irq->ar_type == ACPI_EDGE_SENSITIVE) ? IST_EDGE : IST_LEVEL, 193 IPL_BIO, fdcintr, sc); 194 195 /* Setup direct configuration of floppy drives */ 196 sc->sc_present = fdc_acpi_enumerate(asc); 197 if (sc->sc_present >= 0) { 198 sc->sc_known = 1; 199 fdc_acpi_getknownfds(asc); 200 } else { 201 /* 202 * XXX if there is no _FDE control method, attempt to 203 * probe without pnp 204 */ 205 aprint_debug_dev(sc->sc_dev, 206 "unable to enumerate, attempting normal probe\n"); 207 } 208 209 fdcattach(sc); 210 211 out: 212 acpi_resource_cleanup(&res); 213 } 214 215 static int 216 fdc_acpi_enumerate(struct fdc_acpi_softc *asc) 217 { 218 struct fdc_softc *sc = &asc->sc_fdc; 219 ACPI_OBJECT *fde; 220 ACPI_BUFFER abuf; 221 ACPI_STATUS rv; 222 uint32_t *p; 223 int i, drives = -1; 224 225 rv = acpi_eval_struct(asc->sc_node->ad_handle, "_FDE", &abuf); 226 227 if (ACPI_FAILURE(rv)) { 228 aprint_normal_dev(sc->sc_dev, "failed to evaluate _FDE: %s\n", 229 AcpiFormatException(rv)); 230 return drives; 231 } 232 fde = abuf.Pointer; 233 if (fde->Type != ACPI_TYPE_BUFFER) { 234 aprint_error_dev(sc->sc_dev, "expected BUFFER, got %u\n", 235 fde->Type); 236 goto out; 237 } 238 if (fde->Buffer.Length < 5 * sizeof(uint32_t)) { 239 aprint_error_dev(sc->sc_dev, 240 "expected buffer len of %lu, got %u\n", 241 (unsigned long)(5 * sizeof(uint32_t)), fde->Buffer.Length); 242 goto out; 243 } 244 245 p = (uint32_t *)fde->Buffer.Pointer; 246 247 /* 248 * Indexes 0 through 3 are each uint32_t booleans. True if a drive 249 * is present. 250 */ 251 drives = 0; 252 for (i = 0; i < 4; i++) { 253 if (p[i]) drives |= (1 << i); 254 aprint_normal_dev(sc->sc_dev, "drive %d %sattached\n", i, 255 p[i] ? "" : "not "); 256 } 257 258 /* 259 * p[4] reports tape presence. Possible values: 260 * 0 - Unknown if device is present 261 * 1 - Device is present 262 * 2 - Device is never present 263 * >2 - Reserved 264 * 265 * we don't currently use this. 266 */ 267 268 out: 269 ACPI_FREE(abuf.Pointer); 270 return drives; 271 } 272 273 static void 274 fdc_acpi_getknownfds(struct fdc_acpi_softc *asc) 275 { 276 struct fdc_softc *sc = &asc->sc_fdc; 277 ACPI_OBJECT *fdi, *e; 278 ACPI_BUFFER abuf; 279 ACPI_STATUS rv; 280 int i; 281 282 for (i = 0; i < 4; i++) { 283 if ((sc->sc_present & (1 << i)) == 0) 284 continue; 285 rv = acpi_eval_struct(asc->sc_node->ad_handle, "_FDI", &abuf); 286 if (ACPI_FAILURE(rv)) { 287 aprint_normal_dev(sc->sc_dev, 288 "failed to evaluate _FDI: %s on drive %d\n", 289 AcpiFormatException(rv), i); 290 /* XXX if _FDI fails, assume 1.44MB floppy */ 291 sc->sc_knownfds[i] = &fdc_acpi_fdtypes[0]; 292 continue; 293 } 294 fdi = abuf.Pointer; 295 if (fdi->Type != ACPI_TYPE_PACKAGE) { 296 aprint_error_dev(sc->sc_dev, 297 "expected PACKAGE, got %u\n", fdi->Type); 298 goto out; 299 } 300 e = fdi->Package.Elements; 301 sc->sc_knownfds[i] = fdc_acpi_nvtotype( 302 device_xname(sc->sc_dev), 303 e[1].Integer.Value, e[0].Integer.Value); 304 305 /* if fdc_acpi_nvtotype returns NULL, don't attach drive */ 306 if (!sc->sc_knownfds[i]) 307 sc->sc_present &= ~(1 << i); 308 309 out: 310 ACPI_FREE(abuf.Pointer); 311 } 312 } 313 314 static const struct fd_type * 315 fdc_acpi_nvtotype(const char *fdc, int nvraminfo, int drive) 316 { 317 int type; 318 319 type = (drive == 0 ? nvraminfo : nvraminfo << 4) & 0xf0; 320 switch (type) { 321 case ACPI_FDC_DISKETTE_NONE: 322 return NULL; 323 case ACPI_FDC_DISKETTE_12M: 324 return &fdc_acpi_fdtypes[1]; 325 case ACPI_FDC_DISKETTE_TYPE5: 326 case ACPI_FDC_DISKETTE_TYPE6: 327 case ACPI_FDC_DISKETTE_144M: 328 return &fdc_acpi_fdtypes[0]; 329 case ACPI_FDC_DISKETTE_360K: 330 return &fdc_acpi_fdtypes[3]; 331 case ACPI_FDC_DISKETTE_720K: 332 return &fdc_acpi_fdtypes[4]; 333 default: 334 aprint_normal("%s: drive %d: unknown device type 0x%x\n", 335 fdc, drive, type); 336 return NULL; 337 } 338 } 339
Indexes created Thu Oct 02 14:10:14 GMT 2025