Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
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FreeBSD/Linux Kernel Cross Reference
sys/dev/ata/ata-cbus.c
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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("$FreeBSD$"); 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 #ifndef ATA_CAM 57 struct mtx bank_mtx; 58 int locked_bank; 59 int restart_bank; 60 int hardware_bank; 61 #endif 62 int channels; 63 struct { 64 void (*function)(void *); 65 void *argument; 66 } interrupt[2]; 67 }; 68 69 /* local prototypes */ 70 static void ata_cbus_intr(void *); 71 #ifndef ATA_CAM 72 static int ata_cbuschannel_banking(device_t dev, int flags); 73 #endif 74 75 static int 76 ata_cbus_probe(device_t dev) 77 { 78 struct resource *io; 79 int rid; 80 u_long tmp; 81 82 /* dont probe PnP devices */ 83 if (isa_get_vendorid(dev)) 84 return (ENXIO); 85 86 /* allocate the ioport range */ 87 rid = ATA_IOADDR_RID; 88 if (!(io = bus_alloc_resource(dev, SYS_RES_IOPORT, &rid, 0, ~0, 89 ATA_PC98_IOSIZE, RF_ACTIVE))) 90 return ENOMEM; 91 92 /* calculate & set the altport range */ 93 rid = ATA_PC98_CTLADDR_RID; 94 if (bus_get_resource(dev, SYS_RES_IOPORT, rid, &tmp, &tmp)) { 95 bus_set_resource(dev, SYS_RES_IOPORT, rid, 96 rman_get_start(io)+ATA_PC98_CTLOFFSET, ATA_CTLIOSIZE); 97 } 98 99 /* calculate & set the bank range */ 100 rid = ATA_PC98_BANKADDR_RID; 101 if (bus_get_resource(dev, SYS_RES_IOPORT, rid, &tmp, &tmp)) { 102 bus_set_resource(dev, SYS_RES_IOPORT, rid, 103 ATA_PC98_BANK, ATA_PC98_BANKIOSIZE); 104 } 105 106 bus_release_resource(dev, SYS_RES_IOPORT, ATA_IOADDR_RID, io); 107 return 0; 108 } 109 110 static int 111 ata_cbus_attach(device_t dev) 112 { 113 struct ata_cbus_controller *ctlr = device_get_softc(dev); 114 device_t child; 115 int rid, unit; 116 117 /* allocate resources */ 118 rid = ATA_IOADDR_RID; 119 if (!(ctlr->io = bus_alloc_resource(dev, SYS_RES_IOPORT, &rid, 0, ~0, 120 ATA_PC98_IOSIZE, RF_ACTIVE))) 121 return ENOMEM; 122 123 rid = ATA_PC98_CTLADDR_RID; 124 if (!(ctlr->ctlio = 125 bus_alloc_resource(dev, SYS_RES_IOPORT, &rid, 126 rman_get_start(ctlr->io) + ATA_PC98_CTLOFFSET, ~0, 127 ATA_CTLIOSIZE, RF_ACTIVE))) { 128 bus_release_resource(dev, SYS_RES_IOPORT, ATA_IOADDR_RID, ctlr->io); 129 return ENOMEM; 130 } 131 132 rid = ATA_PC98_BANKADDR_RID; 133 if (!(ctlr->bankio = bus_alloc_resource(dev, SYS_RES_IOPORT, &rid, 134 ATA_PC98_BANK, ~0, 135 ATA_PC98_BANKIOSIZE, RF_ACTIVE))) { 136 bus_release_resource(dev, SYS_RES_IOPORT, ATA_IOADDR_RID, ctlr->io); 137 bus_release_resource(dev, SYS_RES_IOPORT, ATA_CTLADDR_RID, ctlr->ctlio); 138 return ENOMEM; 139 } 140 141 rid = ATA_IRQ_RID; 142 if (!(ctlr->irq = bus_alloc_resource_any(dev, SYS_RES_IRQ, &rid, 143 RF_ACTIVE | RF_SHAREABLE))) { 144 device_printf(dev, "unable to alloc interrupt\n"); 145 bus_release_resource(dev, SYS_RES_IOPORT, ATA_IOADDR_RID, ctlr->io); 146 bus_release_resource(dev, SYS_RES_IOPORT, ATA_CTLADDR_RID, ctlr->ctlio); 147 bus_release_resource(dev, SYS_RES_IOPORT, 148 ATA_PC98_BANKADDR_RID, ctlr->bankio); 149 return ENXIO; 150 } 151 152 if ((bus_setup_intr(dev, ctlr->irq, ATA_INTR_FLAGS, 153 NULL, ata_cbus_intr, ctlr, &ctlr->ih))) { 154 device_printf(dev, "unable to setup interrupt\n"); 155 bus_release_resource(dev, SYS_RES_IOPORT, ATA_IOADDR_RID, ctlr->io); 156 bus_release_resource(dev, SYS_RES_IOPORT, ATA_CTLADDR_RID, ctlr->ctlio); 157 bus_release_resource(dev, SYS_RES_IOPORT, 158 ATA_PC98_BANKADDR_RID, ctlr->bankio); 159 bus_release_resource(dev, SYS_RES_IOPORT, ATA_IRQ_RID, ctlr->irq); 160 return ENXIO; 161 } 162 163 #ifndef ATA_CAM 164 ctlr->channels = 2; 165 mtx_init(&ctlr->bank_mtx, "ATA cbus bank lock", NULL, MTX_DEF); 166 ctlr->hardware_bank = -1; 167 ctlr->locked_bank = -1; 168 ctlr->restart_bank = -1; 169 #else 170 /* Work around the lack of channel serialization in ATA_CAM. */ 171 ctlr->channels = 1; 172 device_printf(dev, "second channel ignored\n"); 173 #endif 174 175 for (unit = 0; unit < ctlr->channels; unit++) { 176 child = device_add_child(dev, "ata", unit); 177 if (child == NULL) 178 device_printf(dev, "failed to add ata child device\n"); 179 else 180 device_set_ivars(child, (void *)(intptr_t)unit); 181 } 182 183 bus_generic_attach(dev); 184 return (0); 185 } 186 187 static struct resource * 188 ata_cbus_alloc_resource(device_t dev, device_t child, int type, int *rid, 189 u_long start, u_long end, u_long count, u_int flags) 190 { 191 struct ata_cbus_controller *ctlr = device_get_softc(dev); 192 193 if (type == SYS_RES_IOPORT) { 194 switch (*rid) { 195 case ATA_IOADDR_RID: 196 return ctlr->io; 197 case ATA_CTLADDR_RID: 198 return ctlr->ctlio; 199 } 200 } 201 if (type == SYS_RES_IRQ) 202 return ctlr->irq; 203 return 0; 204 } 205 206 static int 207 ata_cbus_setup_intr(device_t dev, device_t child, struct resource *irq, 208 int flags, driver_filter_t *filter, driver_intr_t *intr, 209 void *arg, void **cookiep) 210 { 211 struct ata_cbus_controller *controller = device_get_softc(dev); 212 int unit = ((struct ata_channel *)device_get_softc(child))->unit; 213 214 if (filter != NULL) { 215 printf("ata-cbus.c: we cannot use a filter here\n"); 216 return (EINVAL); 217 } 218 controller->interrupt[unit].function = intr; 219 controller->interrupt[unit].argument = arg; 220 *cookiep = controller; 221 222 return 0; 223 } 224 225 static int 226 ata_cbus_print_child(device_t dev, device_t child) 227 { 228 struct ata_channel *ch = device_get_softc(child); 229 int retval = 0; 230 231 retval += bus_print_child_header(dev, child); 232 retval += printf(" at bank %d", ch->unit); 233 retval += bus_print_child_footer(dev, child); 234 return retval; 235 } 236 237 static void 238 ata_cbus_intr(void *data) 239 { 240 struct ata_cbus_controller *ctlr = data; 241 struct ata_channel *ch; 242 int unit; 243 244 for (unit = 0; unit < ctlr->channels; unit++) { 245 if (!(ch = ctlr->interrupt[unit].argument)) 246 continue; 247 #ifndef ATA_CAM 248 if (ata_cbuschannel_banking(ch->dev, ATA_LF_WHICH) == unit) 249 #endif 250 ctlr->interrupt[unit].function(ch); 251 } 252 } 253 254 static device_method_t ata_cbus_methods[] = { 255 /* device interface */ 256 DEVMETHOD(device_probe, ata_cbus_probe), 257 DEVMETHOD(device_attach, ata_cbus_attach), 258 // DEVMETHOD(device_detach, ata_cbus_detach), 259 260 /* bus methods */ 261 DEVMETHOD(bus_alloc_resource, ata_cbus_alloc_resource), 262 DEVMETHOD(bus_setup_intr, ata_cbus_setup_intr), 263 DEVMETHOD(bus_print_child, ata_cbus_print_child), 264 265 DEVMETHOD_END 266 }; 267 268 static driver_t ata_cbus_driver = { 269 "atacbus", 270 ata_cbus_methods, 271 sizeof(struct ata_cbus_controller), 272 }; 273 274 static devclass_t ata_cbus_devclass; 275 276 DRIVER_MODULE(atacbus, isa, ata_cbus_driver, ata_cbus_devclass, NULL, NULL); 277 278 static int 279 ata_cbuschannel_probe(device_t dev) 280 { 281 char buffer[32]; 282 283 sprintf(buffer, "ATA channel %d", (int)(intptr_t)device_get_ivars(dev)); 284 device_set_desc_copy(dev, buffer); 285 286 return ata_probe(dev); 287 } 288 289 static int 290 ata_cbuschannel_attach(device_t dev) 291 { 292 struct ata_cbus_controller *ctlr = device_get_softc(device_get_parent(dev)); 293 struct ata_channel *ch = device_get_softc(dev); 294 int i; 295 296 if (ch->attached) 297 return (0); 298 ch->attached = 1; 299 300 ch->unit = (intptr_t)device_get_ivars(dev); 301 /* setup the resource vectors */ 302 for (i = ATA_DATA; i <= ATA_COMMAND; i ++) { 303 ch->r_io[i].res = ctlr->io; 304 ch->r_io[i].offset = i << 1; 305 } 306 ch->r_io[ATA_CONTROL].res = ctlr->ctlio; 307 ch->r_io[ATA_CONTROL].offset = 0; 308 ch->r_io[ATA_IDX_ADDR].res = ctlr->io; 309 ata_default_registers(dev); 310 311 /* initialize softc for this channel */ 312 ch->flags |= ATA_USE_16BIT; 313 ata_generic_hw(dev); 314 315 return ata_attach(dev); 316 } 317 318 static int 319 ata_cbuschannel_detach(device_t dev) 320 { 321 struct ata_channel *ch = device_get_softc(dev); 322 323 if (!ch->attached) 324 return (0); 325 ch->attached = 0; 326 327 return ata_detach(dev); 328 } 329 330 static int 331 ata_cbuschannel_suspend(device_t dev) 332 { 333 struct ata_channel *ch = device_get_softc(dev); 334 335 if (!ch->attached) 336 return (0); 337 338 return ata_suspend(dev); 339 } 340 341 static int 342 ata_cbuschannel_resume(device_t dev) 343 { 344 struct ata_channel *ch = device_get_softc(dev); 345 346 if (!ch->attached) 347 return (0); 348 349 return ata_resume(dev); 350 } 351 352 #ifndef ATA_CAM 353 static int 354 ata_cbuschannel_banking(device_t dev, int flags) 355 { 356 struct ata_cbus_controller *ctlr = device_get_softc(device_get_parent(dev)); 357 struct ata_channel *ch = device_get_softc(dev); 358 int res; 359 360 mtx_lock(&ctlr->bank_mtx); 361 switch (flags) { 362 case ATA_LF_LOCK: 363 if (ctlr->locked_bank == -1) 364 ctlr->locked_bank = ch->unit; 365 if (ctlr->locked_bank == ch->unit) { 366 ctlr->hardware_bank = ch->unit; 367 ATA_OUTB(ctlr->bankio, 0, ch->unit); 368 } 369 else 370 ctlr->restart_bank = ch->unit; 371 break; 372 373 case ATA_LF_UNLOCK: 374 if (ctlr->locked_bank == ch->unit) { 375 ctlr->locked_bank = -1; 376 if (ctlr->restart_bank != -1) { 377 if ((ch = ctlr->interrupt[ctlr->restart_bank].argument)) { 378 ctlr->restart_bank = -1; 379 mtx_unlock(&ctlr->bank_mtx); 380 ata_start(ch->dev); 381 return -1; 382 } 383 } 384 } 385 break; 386 387 case ATA_LF_WHICH: 388 break; 389 } 390 res = ctlr->locked_bank; 391 mtx_unlock(&ctlr->bank_mtx); 392 return res; 393 } 394 #endif 395 396 static device_method_t ata_cbuschannel_methods[] = { 397 /* device interface */ 398 DEVMETHOD(device_probe, ata_cbuschannel_probe), 399 DEVMETHOD(device_attach, ata_cbuschannel_attach), 400 DEVMETHOD(device_detach, ata_cbuschannel_detach), 401 DEVMETHOD(device_suspend, ata_cbuschannel_suspend), 402 DEVMETHOD(device_resume, ata_cbuschannel_resume), 403 404 #ifndef ATA_CAM 405 /* ATA methods */ 406 DEVMETHOD(ata_locking, ata_cbuschannel_banking), 407 #endif 408 DEVMETHOD_END 409 }; 410 411 static driver_t ata_cbuschannel_driver = { 412 "ata", 413 ata_cbuschannel_methods, 414 sizeof(struct ata_channel), 415 }; 416 417 DRIVER_MODULE(ata, atacbus, ata_cbuschannel_driver, ata_devclass, NULL, NULL); 418 MODULE_DEPEND(ata, ata, 1, 1, 1);
Cache object: 4a26055410d5d89dd574a9b0d8447b83
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