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 - 2004 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 * 3. The name of the author may not be used to endorse or promote products 15 * derived from this software without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 */ 28 29 #include <sys/cdefs.h> 30 __FBSDID("$FreeBSD$"); 31 32 #include "opt_ata.h" 33 #include <sys/param.h> 34 #include <sys/systm.h> 35 #include <sys/kernel.h> 36 #include <sys/ata.h> 37 #include <sys/bus.h> 38 #include <sys/malloc.h> 39 #include <sys/module.h> 40 #include <sys/conf.h> 41 #include <sys/sema.h> 42 #include <sys/taskqueue.h> 43 #include <vm/uma.h> 44 #include <machine/resource.h> 45 #include <machine/bus.h> 46 #include <sys/rman.h> 47 #include <isa/isavar.h> 48 #include <dev/ata/ata-all.h> 49 50 /* local vars */ 51 struct ata_cbus_controller { 52 struct resource *io; 53 struct resource *altio; 54 struct resource *bankio; 55 struct resource *irq; 56 void *ih; 57 void (*setmode)(struct ata_device *, int); 58 int (*locking)(struct ata_channel *, int); 59 struct mtx bank_mtx; 60 int current_bank; 61 int restart_bank; 62 struct { 63 void (*function)(void *); 64 void *argument; 65 } interrupt[2]; 66 }; 67 68 /* local prototypes */ 69 static void ata_cbus_intr(void *); 70 static int ata_cbus_banking(struct ata_channel *, int); 71 static void ata_cbus_setmode(struct ata_device *, int); 72 73 static int 74 ata_cbus_probe(device_t dev) 75 { 76 struct resource *io; 77 int rid; 78 u_long tmp; 79 80 /* dont probe PnP devices */ 81 if (isa_get_vendorid(dev)) 82 return (ENXIO); 83 84 /* allocate the ioport range */ 85 rid = ATA_IOADDR_RID; 86 io = bus_alloc_resource(dev, SYS_RES_IOPORT, &rid, 0, ~0, 87 ATA_PC98_IOSIZE, RF_ACTIVE); 88 if (!io) 89 return ENOMEM; 90 91 /* calculate & set the altport range */ 92 rid = ATA_PC98_ALTADDR_RID; 93 if (bus_get_resource(dev, SYS_RES_IOPORT, rid, &tmp, &tmp)) { 94 bus_set_resource(dev, SYS_RES_IOPORT, rid, 95 rman_get_start(io)+ATA_PC98_ALTOFFSET, ATA_ALTIOSIZE); 96 } 97 98 /* calculate & set the bank range */ 99 rid = ATA_PC98_BANKADDR_RID; 100 if (bus_get_resource(dev, SYS_RES_IOPORT, rid, &tmp, &tmp)) { 101 bus_set_resource(dev, SYS_RES_IOPORT, rid, 102 ATA_PC98_BANK, ATA_PC98_BANKIOSIZE); 103 } 104 105 bus_release_resource(dev, SYS_RES_IOPORT, ATA_IOADDR_RID, io); 106 return 0; 107 } 108 109 static int 110 ata_cbus_attach(device_t dev) 111 { 112 struct ata_cbus_controller *ctlr = device_get_softc(dev); 113 int rid; 114 115 /* allocate resources */ 116 rid = ATA_IOADDR_RID; 117 ctlr->io = bus_alloc_resource(dev, SYS_RES_IOPORT, &rid, 0, ~0, 118 ATA_PC98_IOSIZE, RF_ACTIVE); 119 if (!ctlr->io) 120 return ENOMEM; 121 122 rid = ATA_PC98_ALTADDR_RID; 123 ctlr->altio = 124 bus_alloc_resource(dev, SYS_RES_IOPORT, &rid, 125 rman_get_start(ctlr->io) + ATA_PC98_ALTOFFSET, ~0, 126 ATA_ALTIOSIZE, RF_ACTIVE); 127 if (!ctlr->altio) { 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 ctlr->bankio = bus_alloc_resource(dev, SYS_RES_IOPORT, &rid, 134 ATA_PC98_BANK, ~0, 135 ATA_PC98_BANKIOSIZE, RF_ACTIVE); 136 if (!ctlr->bankio) { 137 bus_release_resource(dev, SYS_RES_IOPORT, ATA_IOADDR_RID, ctlr->io); 138 bus_release_resource(dev, SYS_RES_IOPORT, ATA_ALTADDR_RID, ctlr->altio); 139 return ENOMEM; 140 } 141 142 rid = ATA_IRQ_RID; 143 if (!(ctlr->irq = bus_alloc_resource_any(dev, SYS_RES_IRQ, &rid, 144 RF_ACTIVE | RF_SHAREABLE))) { 145 device_printf(dev, "unable to alloc interrupt\n"); 146 bus_release_resource(dev, SYS_RES_IOPORT, ATA_IOADDR_RID, ctlr->io); 147 bus_release_resource(dev, SYS_RES_IOPORT, ATA_ALTADDR_RID, ctlr->altio); 148 bus_release_resource(dev, SYS_RES_IOPORT, 149 ATA_PC98_BANKADDR_RID, ctlr->bankio); 150 return ENXIO; 151 } 152 153 if ((bus_setup_intr(dev, ctlr->irq, ATA_INTR_FLAGS, 154 ata_cbus_intr, ctlr, &ctlr->ih))) { 155 device_printf(dev, "unable to setup interrupt\n"); 156 bus_release_resource(dev, SYS_RES_IOPORT, ATA_IOADDR_RID, ctlr->io); 157 bus_release_resource(dev, SYS_RES_IOPORT, ATA_ALTADDR_RID, ctlr->altio); 158 bus_release_resource(dev, SYS_RES_IOPORT, 159 ATA_PC98_BANKADDR_RID, ctlr->bankio); 160 bus_release_resource(dev, SYS_RES_IOPORT, ATA_IRQ_RID, ctlr->irq); 161 return ENXIO; 162 } 163 164 mtx_init(&ctlr->bank_mtx, "ATA cbus bank lock", NULL, MTX_DEF); 165 ctlr->current_bank = -1; 166 ctlr->restart_bank = -1; 167 ctlr->locking = ata_cbus_banking; 168 ctlr->setmode = ata_cbus_setmode;; 169 170 if (!device_add_child(dev, "ata", 0)) 171 return ENOMEM; 172 if (!device_add_child(dev, "ata", 1)) 173 return ENOMEM; 174 175 return bus_generic_attach(dev); 176 } 177 178 static struct resource * 179 ata_cbus_alloc_resource(device_t dev, device_t child, int type, int *rid, 180 u_long start, u_long end, u_long count, u_int flags) 181 { 182 struct ata_cbus_controller *ctlr = device_get_softc(dev); 183 184 if (type == SYS_RES_IOPORT) { 185 switch (*rid) { 186 case ATA_IOADDR_RID: 187 return ctlr->io; 188 case ATA_ALTADDR_RID: 189 return ctlr->altio; 190 } 191 } 192 if (type == SYS_RES_IRQ) 193 return ctlr->irq; 194 return 0; 195 } 196 197 static int 198 ata_cbus_setup_intr(device_t dev, device_t child, struct resource *irq, 199 int flags, driver_intr_t *intr, void *arg, 200 void **cookiep) 201 { 202 struct ata_cbus_controller *controller = device_get_softc(dev); 203 int unit = ((struct ata_channel *)device_get_softc(child))->unit; 204 205 controller->interrupt[unit].function = intr; 206 controller->interrupt[unit].argument = arg; 207 *cookiep = controller; 208 209 return 0; 210 } 211 212 static int 213 ata_cbus_print_child(device_t dev, device_t child) 214 { 215 struct ata_channel *ch = device_get_softc(child); 216 int retval = 0; 217 218 retval += bus_print_child_header(dev, child); 219 retval += printf(" at bank %d", ch->unit); 220 retval += bus_print_child_footer(dev, child); 221 return retval; 222 } 223 224 static void 225 ata_cbus_intr(void *data) 226 { 227 struct ata_cbus_controller *ctlr = data; 228 struct ata_channel *ch; 229 int unit; 230 231 for (unit = 0; unit < 2; unit++) { 232 if (!(ch = ctlr->interrupt[unit].argument)) 233 continue; 234 if (ch->locking(ch, ATA_LF_WHICH) == unit) 235 ctlr->interrupt[unit].function(ch); 236 } 237 } 238 239 static int 240 ata_cbus_banking(struct ata_channel *ch, int flags) 241 { 242 struct ata_cbus_controller *ctlr = 243 device_get_softc(device_get_parent(ch->dev)); 244 int res; 245 246 mtx_lock(&ctlr->bank_mtx); 247 switch (flags) { 248 case ATA_LF_LOCK: 249 if (ctlr->current_bank == -1) 250 ctlr->current_bank = ch->unit; 251 if (ctlr->current_bank == ch->unit) 252 ATA_OUTB(ctlr->bankio, 0, ch->unit); 253 else 254 ctlr->restart_bank = ch->unit; 255 break; 256 257 case ATA_LF_UNLOCK: 258 if (ctlr->current_bank == ch->unit) { 259 ctlr->current_bank = -1; 260 if (ctlr->restart_bank != -1) { 261 if (ctlr->interrupt[ctlr->restart_bank].argument) { 262 mtx_unlock(&ctlr->bank_mtx); 263 ata_start(ctlr->interrupt[ctlr->restart_bank].argument); 264 mtx_lock(&ctlr->bank_mtx); 265 } 266 ctlr->restart_bank = -1; 267 } 268 } 269 break; 270 271 case ATA_LF_WHICH: 272 break; 273 } 274 res = ctlr->current_bank; 275 mtx_unlock(&ctlr->bank_mtx); 276 return res; 277 } 278 279 static void 280 ata_cbus_setmode(struct ata_device *atadev, int mode) 281 { 282 atadev->mode = ata_limit_mode(atadev, mode, ATA_PIO_MAX); 283 } 284 285 static device_method_t ata_cbus_methods[] = { 286 /* device_interface */ 287 DEVMETHOD(device_probe, ata_cbus_probe), 288 DEVMETHOD(device_attach, ata_cbus_attach), 289 290 /* bus methods */ 291 DEVMETHOD(bus_alloc_resource, ata_cbus_alloc_resource), 292 DEVMETHOD(bus_setup_intr, ata_cbus_setup_intr), 293 DEVMETHOD(bus_print_child, ata_cbus_print_child), 294 { 0, 0 } 295 }; 296 297 static driver_t ata_cbus_driver = { 298 "atacbus", 299 ata_cbus_methods, 300 sizeof(struct ata_cbus_controller), 301 }; 302 303 static devclass_t ata_cbus_devclass; 304 305 DRIVER_MODULE(atacbus, isa, ata_cbus_driver, ata_cbus_devclass, 0, 0); 306 307 static int 308 ata_cbussub_probe(device_t dev) 309 { 310 struct ata_cbus_controller *ctlr = device_get_softc(device_get_parent(dev)); 311 struct ata_channel *ch = device_get_softc(dev); 312 device_t *children; 313 int count, i; 314 315 /* find channel number on this controller */ 316 device_get_children(device_get_parent(dev), &children, &count); 317 for (i = 0; i < count; i++) { 318 if (children[i] == dev) 319 ch->unit = i; 320 } 321 free(children, M_TEMP); 322 323 /* setup the resource vectors */ 324 for (i = ATA_DATA; i <= ATA_STATUS; i ++) { 325 ch->r_io[i].res = ctlr->io; 326 ch->r_io[i].offset = i << 1; 327 } 328 ch->r_io[ATA_ALTSTAT].res = ctlr->altio; 329 ch->r_io[ATA_ALTSTAT].offset = 0; 330 331 /* initialize softc for this channel */ 332 ch->flags |= ATA_USE_16BIT | ATA_USE_PC98GEOM; 333 ch->locking = ctlr->locking; 334 ch->device[MASTER].setmode = ctlr->setmode; 335 ch->device[SLAVE].setmode = ctlr->setmode; 336 ata_generic_hw(ch); 337 return ata_probe(dev); 338 } 339 340 static device_method_t ata_cbussub_methods[] = { 341 /* device interface */ 342 DEVMETHOD(device_probe, ata_cbussub_probe), 343 DEVMETHOD(device_attach, ata_attach), 344 DEVMETHOD(device_detach, ata_detach), 345 DEVMETHOD(device_resume, ata_resume), 346 { 0, 0 } 347 }; 348 349 static driver_t ata_cbussub_driver = { 350 "ata", 351 ata_cbussub_methods, 352 sizeof(struct ata_channel), 353 }; 354 355 DRIVER_MODULE(ata, atacbus, ata_cbussub_driver, ata_devclass, 0, 0);
Cache object: 7d86b3efbd2ea631462a5b8ff337c3a4
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