Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
[ source navigation ] [ diff markup ] [ identifier search ] [ freetext search ] [ file search ] [ list types ] [ track identifier ]
FreeBSD/Linux Kernel Cross Reference
sys/dev/ata/ata-cbus.c
Version:
- FREEBSD - FREEBSD-13-STABLE - FREEBSD-13-0 - FREEBSD-12-STABLE - FREEBSD-12-0 - FREEBSD-11-STABLE - FREEBSD-11-0 - FREEBSD-10-STABLE - FREEBSD-10-0 - FREEBSD-9-STABLE - FREEBSD-9-0 - FREEBSD-8-STABLE - FREEBSD-8-0 - FREEBSD-7-STABLE - FREEBSD-7-0 - FREEBSD-6-STABLE - FREEBSD-6-0 - FREEBSD-5-STABLE - FREEBSD-5-0 - FREEBSD-4-STABLE - FREEBSD-3-STABLE - FREEBSD22 - l41 - OPENBSD - linux-2.6 - MK84 - PLAN9 - xnu-8792
SearchContext: - none - 3 - 10
SearchContext: - none - 3 - 10
1 /*- 2 * Copyright (c) 2002 - 2008 Søren Schmidt <sos@FreeBSD.org> 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer, 10 * without modification, immediately at the beginning of the file. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 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, BUT 20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 25 */ 26 27 #include <sys/cdefs.h> 28 __FBSDID("$FreeBSD: releng/8.4/sys/dev/ata/ata-cbus.c 233718 2012-03-30 23:56:19Z marius $"); 29 30 #include "opt_ata.h" 31 #include <sys/param.h> 32 #include <sys/systm.h> 33 #include <sys/kernel.h> 34 #include <sys/ata.h> 35 #include <sys/bus.h> 36 #include <sys/malloc.h> 37 #include <sys/module.h> 38 #include <sys/conf.h> 39 #include <sys/sema.h> 40 #include <sys/taskqueue.h> 41 #include <vm/uma.h> 42 #include <machine/resource.h> 43 #include <machine/bus.h> 44 #include <sys/rman.h> 45 #include <isa/isavar.h> 46 #include <dev/ata/ata-all.h> 47 #include <ata_if.h> 48 49 /* local vars */ 50 struct ata_cbus_controller { 51 struct resource *io; 52 struct resource *ctlio; 53 struct resource *bankio; 54 struct resource *irq; 55 void *ih; 56 struct mtx bank_mtx; 57 int locked_bank; 58 int restart_bank; 59 int hardware_bank; 60 struct { 61 void (*function)(void *); 62 void *argument; 63 } interrupt[2]; 64 }; 65 66 /* local prototypes */ 67 static void ata_cbus_intr(void *); 68 static int ata_cbuschannel_banking(device_t dev, int flags); 69 70 static int 71 ata_cbus_probe(device_t dev) 72 { 73 struct resource *io; 74 int rid; 75 u_long tmp; 76 77 /* dont probe PnP devices */ 78 if (isa_get_vendorid(dev)) 79 return (ENXIO); 80 81 /* allocate the ioport range */ 82 rid = ATA_IOADDR_RID; 83 if (!(io = bus_alloc_resource(dev, SYS_RES_IOPORT, &rid, 0, ~0, 84 ATA_PC98_IOSIZE, RF_ACTIVE))) 85 return ENOMEM; 86 87 /* calculate & set the altport range */ 88 rid = ATA_PC98_CTLADDR_RID; 89 if (bus_get_resource(dev, SYS_RES_IOPORT, rid, &tmp, &tmp)) { 90 bus_set_resource(dev, SYS_RES_IOPORT, rid, 91 rman_get_start(io)+ATA_PC98_CTLOFFSET, ATA_CTLIOSIZE); 92 } 93 94 /* calculate & set the bank range */ 95 rid = ATA_PC98_BANKADDR_RID; 96 if (bus_get_resource(dev, SYS_RES_IOPORT, rid, &tmp, &tmp)) { 97 bus_set_resource(dev, SYS_RES_IOPORT, rid, 98 ATA_PC98_BANK, ATA_PC98_BANKIOSIZE); 99 } 100 101 bus_release_resource(dev, SYS_RES_IOPORT, ATA_IOADDR_RID, io); 102 return 0; 103 } 104 105 static int 106 ata_cbus_attach(device_t dev) 107 { 108 struct ata_cbus_controller *ctlr = device_get_softc(dev); 109 device_t child; 110 int rid, unit; 111 112 /* allocate resources */ 113 rid = ATA_IOADDR_RID; 114 if (!(ctlr->io = bus_alloc_resource(dev, SYS_RES_IOPORT, &rid, 0, ~0, 115 ATA_PC98_IOSIZE, RF_ACTIVE))) 116 return ENOMEM; 117 118 rid = ATA_PC98_CTLADDR_RID; 119 if (!(ctlr->ctlio = 120 bus_alloc_resource(dev, SYS_RES_IOPORT, &rid, 121 rman_get_start(ctlr->io) + ATA_PC98_CTLOFFSET, ~0, 122 ATA_CTLIOSIZE, RF_ACTIVE))) { 123 bus_release_resource(dev, SYS_RES_IOPORT, ATA_IOADDR_RID, ctlr->io); 124 return ENOMEM; 125 } 126 127 rid = ATA_PC98_BANKADDR_RID; 128 if (!(ctlr->bankio = bus_alloc_resource(dev, SYS_RES_IOPORT, &rid, 129 ATA_PC98_BANK, ~0, 130 ATA_PC98_BANKIOSIZE, RF_ACTIVE))) { 131 bus_release_resource(dev, SYS_RES_IOPORT, ATA_IOADDR_RID, ctlr->io); 132 bus_release_resource(dev, SYS_RES_IOPORT, ATA_CTLADDR_RID, ctlr->ctlio); 133 return ENOMEM; 134 } 135 136 rid = ATA_IRQ_RID; 137 if (!(ctlr->irq = bus_alloc_resource_any(dev, SYS_RES_IRQ, &rid, 138 RF_ACTIVE | RF_SHAREABLE))) { 139 device_printf(dev, "unable to alloc interrupt\n"); 140 bus_release_resource(dev, SYS_RES_IOPORT, ATA_IOADDR_RID, ctlr->io); 141 bus_release_resource(dev, SYS_RES_IOPORT, ATA_CTLADDR_RID, ctlr->ctlio); 142 bus_release_resource(dev, SYS_RES_IOPORT, 143 ATA_PC98_BANKADDR_RID, ctlr->bankio); 144 return ENXIO; 145 } 146 147 if ((bus_setup_intr(dev, ctlr->irq, ATA_INTR_FLAGS, 148 NULL, ata_cbus_intr, ctlr, &ctlr->ih))) { 149 device_printf(dev, "unable to setup interrupt\n"); 150 bus_release_resource(dev, SYS_RES_IOPORT, ATA_IOADDR_RID, ctlr->io); 151 bus_release_resource(dev, SYS_RES_IOPORT, ATA_CTLADDR_RID, ctlr->ctlio); 152 bus_release_resource(dev, SYS_RES_IOPORT, 153 ATA_PC98_BANKADDR_RID, ctlr->bankio); 154 bus_release_resource(dev, SYS_RES_IOPORT, ATA_IRQ_RID, ctlr->irq); 155 return ENXIO; 156 } 157 158 mtx_init(&ctlr->bank_mtx, "ATA cbus bank lock", NULL, MTX_DEF); 159 ctlr->hardware_bank = -1; 160 ctlr->locked_bank = -1; 161 ctlr->restart_bank = -1; 162 163 for (unit = 0; unit < 2; unit++) { 164 child = device_add_child(dev, "ata", unit); 165 if (child == NULL) 166 device_printf(dev, "failed to add ata child device\n"); 167 else 168 device_set_ivars(child, (void *)(intptr_t)unit); 169 } 170 171 bus_generic_attach(dev); 172 return (0); 173 } 174 175 static struct resource * 176 ata_cbus_alloc_resource(device_t dev, device_t child, int type, int *rid, 177 u_long start, u_long end, u_long count, u_int flags) 178 { 179 struct ata_cbus_controller *ctlr = device_get_softc(dev); 180 181 if (type == SYS_RES_IOPORT) { 182 switch (*rid) { 183 case ATA_IOADDR_RID: 184 return ctlr->io; 185 case ATA_CTLADDR_RID: 186 return ctlr->ctlio; 187 } 188 } 189 if (type == SYS_RES_IRQ) 190 return ctlr->irq; 191 return 0; 192 } 193 194 static int 195 ata_cbus_setup_intr(device_t dev, device_t child, struct resource *irq, 196 int flags, driver_filter_t *filter, driver_intr_t *intr, 197 void *arg, void **cookiep) 198 { 199 struct ata_cbus_controller *controller = device_get_softc(dev); 200 int unit = ((struct ata_channel *)device_get_softc(child))->unit; 201 202 if (filter != NULL) { 203 printf("ata-cbus.c: we cannot use a filter here\n"); 204 return (EINVAL); 205 } 206 controller->interrupt[unit].function = intr; 207 controller->interrupt[unit].argument = arg; 208 *cookiep = controller; 209 210 return 0; 211 } 212 213 static int 214 ata_cbus_print_child(device_t dev, device_t child) 215 { 216 struct ata_channel *ch = device_get_softc(child); 217 int retval = 0; 218 219 retval += bus_print_child_header(dev, child); 220 retval += printf(" at bank %d", ch->unit); 221 retval += bus_print_child_footer(dev, child); 222 return retval; 223 } 224 225 static void 226 ata_cbus_intr(void *data) 227 { 228 struct ata_cbus_controller *ctlr = data; 229 struct ata_channel *ch; 230 int unit; 231 232 for (unit = 0; unit < 2; unit++) { 233 if (!(ch = ctlr->interrupt[unit].argument)) 234 continue; 235 if (ata_cbuschannel_banking(ch->dev, ATA_LF_WHICH) == unit) 236 ctlr->interrupt[unit].function(ch); 237 } 238 } 239 240 static device_method_t ata_cbus_methods[] = { 241 /* device interface */ 242 DEVMETHOD(device_probe, ata_cbus_probe), 243 DEVMETHOD(device_attach, ata_cbus_attach), 244 // DEVMETHOD(device_detach, ata_cbus_detach), 245 246 /* bus methods */ 247 DEVMETHOD(bus_alloc_resource, ata_cbus_alloc_resource), 248 DEVMETHOD(bus_setup_intr, ata_cbus_setup_intr), 249 DEVMETHOD(bus_print_child, ata_cbus_print_child), 250 251 DEVMETHOD_END 252 }; 253 254 static driver_t ata_cbus_driver = { 255 "atacbus", 256 ata_cbus_methods, 257 sizeof(struct ata_cbus_controller), 258 }; 259 260 static devclass_t ata_cbus_devclass; 261 262 DRIVER_MODULE(atacbus, isa, ata_cbus_driver, ata_cbus_devclass, 0, 0); 263 264 static int 265 ata_cbuschannel_probe(device_t dev) 266 { 267 char buffer[32]; 268 269 sprintf(buffer, "ATA channel %d", (int)(intptr_t)device_get_ivars(dev)); 270 device_set_desc_copy(dev, buffer); 271 272 return ata_probe(dev); 273 } 274 275 static int 276 ata_cbuschannel_attach(device_t dev) 277 { 278 struct ata_cbus_controller *ctlr = device_get_softc(device_get_parent(dev)); 279 struct ata_channel *ch = device_get_softc(dev); 280 int i; 281 282 if (ch->attached) 283 return (0); 284 ch->attached = 1; 285 286 ch->unit = (intptr_t)device_get_ivars(dev); 287 /* setup the resource vectors */ 288 for (i = ATA_DATA; i <= ATA_COMMAND; i ++) { 289 ch->r_io[i].res = ctlr->io; 290 ch->r_io[i].offset = i << 1; 291 } 292 ch->r_io[ATA_CONTROL].res = ctlr->ctlio; 293 ch->r_io[ATA_CONTROL].offset = 0; 294 ch->r_io[ATA_IDX_ADDR].res = ctlr->io; 295 ata_default_registers(dev); 296 297 /* initialize softc for this channel */ 298 ch->flags |= ATA_USE_16BIT; 299 ata_generic_hw(dev); 300 301 return ata_attach(dev); 302 } 303 304 static int 305 ata_cbuschannel_detach(device_t dev) 306 { 307 struct ata_channel *ch = device_get_softc(dev); 308 309 if (!ch->attached) 310 return (0); 311 ch->attached = 0; 312 313 return ata_detach(dev); 314 } 315 316 static int 317 ata_cbuschannel_suspend(device_t dev) 318 { 319 struct ata_channel *ch = device_get_softc(dev); 320 321 if (!ch->attached) 322 return (0); 323 324 return ata_suspend(dev); 325 } 326 327 static int 328 ata_cbuschannel_resume(device_t dev) 329 { 330 struct ata_channel *ch = device_get_softc(dev); 331 332 if (!ch->attached) 333 return (0); 334 335 return ata_resume(dev); 336 } 337 338 static int 339 ata_cbuschannel_banking(device_t dev, int flags) 340 { 341 struct ata_cbus_controller *ctlr = device_get_softc(device_get_parent(dev)); 342 #ifndef ATA_CAM 343 struct ata_channel *ch = device_get_softc(dev); 344 #endif 345 int res; 346 347 mtx_lock(&ctlr->bank_mtx); 348 switch (flags) { 349 #ifndef ATA_CAM 350 case ATA_LF_LOCK: 351 if (ctlr->locked_bank == -1) 352 ctlr->locked_bank = ch->unit; 353 if (ctlr->locked_bank == ch->unit) { 354 ctlr->hardware_bank = ch->unit; 355 ATA_OUTB(ctlr->bankio, 0, ch->unit); 356 } 357 else 358 ctlr->restart_bank = ch->unit; 359 break; 360 361 case ATA_LF_UNLOCK: 362 if (ctlr->locked_bank == ch->unit) { 363 ctlr->locked_bank = -1; 364 if (ctlr->restart_bank != -1) { 365 if ((ch = ctlr->interrupt[ctlr->restart_bank].argument)) { 366 ctlr->restart_bank = -1; 367 mtx_unlock(&ctlr->bank_mtx); 368 ata_start(ch->dev); 369 return -1; 370 } 371 } 372 } 373 break; 374 #endif 375 376 case ATA_LF_WHICH: 377 break; 378 } 379 res = ctlr->locked_bank; 380 mtx_unlock(&ctlr->bank_mtx); 381 return res; 382 } 383 384 static device_method_t ata_cbuschannel_methods[] = { 385 /* device interface */ 386 DEVMETHOD(device_probe, ata_cbuschannel_probe), 387 DEVMETHOD(device_attach, ata_cbuschannel_attach), 388 DEVMETHOD(device_detach, ata_cbuschannel_detach), 389 DEVMETHOD(device_suspend, ata_cbuschannel_suspend), 390 DEVMETHOD(device_resume, ata_cbuschannel_resume), 391 392 #ifndef ATA_CAM 393 /* ATA methods */ 394 DEVMETHOD(ata_locking, ata_cbuschannel_banking), 395 #endif 396 DEVMETHOD_END 397 }; 398 399 static driver_t ata_cbuschannel_driver = { 400 "ata", 401 ata_cbuschannel_methods, 402 sizeof(struct ata_channel), 403 }; 404 405 DRIVER_MODULE(ata, atacbus, ata_cbuschannel_driver, ata_devclass, NULL, NULL); 406 MODULE_DEPEND(ata, ata, 1, 1, 1);
Cache object: 56c6c9f05d18cca890313d29fec025c2
[ source navigation ] [ diff markup ] [ identifier search ] [ freetext search ] [ file search ] [ list types ] [ track identifier ]