1 /* $FreeBSD$ */ 2 3 /* 4 * Copyright (c) 2002 M Warner Losh. All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 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 * This software may be derived from NetBSD i82365.c and other files with 27 * the following copyright: 28 * 29 * Copyright (c) 1997 Marc Horowitz. All rights reserved. 30 * 31 * Redistribution and use in source and binary forms, with or without 32 * modification, are permitted provided that the following conditions 33 * are met: 34 * 1. Redistributions of source code must retain the above copyright 35 * notice, this list of conditions and the following disclaimer. 36 * 2. Redistributions in binary form must reproduce the above copyright 37 * notice, this list of conditions and the following disclaimer in the 38 * documentation and/or other materials provided with the distribution. 39 * 3. All advertising materials mentioning features or use of this software 40 * must display the following acknowledgement: 41 * This product includes software developed by Marc Horowitz. 42 * 4. The name of the author may not be used to endorse or promote products 43 * derived from this software without specific prior written permission. 44 * 45 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 46 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 47 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 48 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 49 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 50 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 51 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 52 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 53 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 54 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 55 */ 56 57 #include <sys/param.h> 58 #include <sys/systm.h> 59 #include <sys/errno.h> 60 #include <sys/kernel.h> 61 #include <sys/malloc.h> 62 #include <sys/queue.h> 63 64 #include <sys/bus.h> 65 #include <machine/bus.h> 66 #include <sys/rman.h> 67 #include <machine/resource.h> 68 69 #include <dev/pccard/pccardreg.h> 70 #include <dev/pccard/pccardvar.h> 71 72 #include <dev/exca/excareg.h> 73 #include <dev/exca/excavar.h> 74 75 #ifdef EXCA_DEBUG 76 #define DEVPRINTF(dev, fmt, args...) device_printf((dev), (fmt), ## args) 77 #define DPRINTF(fmt, args...) printf(fmt, ## args) 78 #else 79 #define DEVPRINTF(dev, fmt, args...) 80 #define DPRINTF(fmt, args...) 81 #endif 82 83 84 /* memory */ 85 86 #define EXCA_MEMINFO(NUM) { \ 87 EXCA_SYSMEM_ADDR ## NUM ## _START_LSB, \ 88 EXCA_SYSMEM_ADDR ## NUM ## _START_MSB, \ 89 EXCA_SYSMEM_ADDR ## NUM ## _STOP_LSB, \ 90 EXCA_SYSMEM_ADDR ## NUM ## _STOP_MSB, \ 91 EXCA_SYSMEM_ADDR ## NUM ## _WIN, \ 92 EXCA_CARDMEM_ADDR ## NUM ## _LSB, \ 93 EXCA_CARDMEM_ADDR ## NUM ## _MSB, \ 94 EXCA_ADDRWIN_ENABLE_MEM ## NUM ##, \ 95 } 96 97 static struct mem_map_index_st { 98 int sysmem_start_lsb; 99 int sysmem_start_msb; 100 int sysmem_stop_lsb; 101 int sysmem_stop_msb; 102 int sysmem_win; 103 int cardmem_lsb; 104 int cardmem_msb; 105 int memenable; 106 } mem_map_index[] = { 107 EXCA_MEMINFO(0), 108 EXCA_MEMINFO(1), 109 EXCA_MEMINFO(2), 110 EXCA_MEMINFO(3), 111 EXCA_MEMINFO(4) 112 }; 113 #undef EXCA_MEMINFO 114 115 /* 116 * Helper function. This will map the requested memory slot. We setup the 117 * map before we call this function. This is used to initially force the 118 * mapping, as well as later restore the mapping after it has been destroyed 119 * in some fashion (due to a power event typically). 120 */ 121 static void 122 exca_do_mem_map(struct exca_softc *sc, int win) 123 { 124 struct mem_map_index_st *map; 125 struct pccard_mem_handle *mem; 126 127 map = &mem_map_index[win]; 128 mem = &sc->mem[win]; 129 exca_write(sc, map->sysmem_start_lsb, 130 (mem->addr >> EXCA_SYSMEM_ADDRX_SHIFT) & 0xff); 131 exca_write(sc, map->sysmem_start_msb, 132 ((mem->addr >> (EXCA_SYSMEM_ADDRX_SHIFT + 8)) & 133 EXCA_SYSMEM_ADDRX_START_MSB_ADDR_MASK) | 0x80); 134 135 exca_write(sc, map->sysmem_stop_lsb, 136 ((mem->addr + mem->realsize - 1) >> 137 EXCA_SYSMEM_ADDRX_SHIFT) & 0xff); 138 exca_write(sc, map->sysmem_stop_msb, 139 (((mem->addr + mem->realsize - 1) >> 140 (EXCA_SYSMEM_ADDRX_SHIFT + 8)) & 141 EXCA_SYSMEM_ADDRX_STOP_MSB_ADDR_MASK) | 142 EXCA_SYSMEM_ADDRX_STOP_MSB_WAIT2); 143 144 exca_write(sc, map->sysmem_win, 145 (mem->addr >> EXCA_MEMREG_WIN_SHIFT) & 0xff); 146 147 exca_write(sc, map->cardmem_lsb, 148 (mem->offset >> EXCA_CARDMEM_ADDRX_SHIFT) & 0xff); 149 exca_write(sc, map->cardmem_msb, 150 ((mem->offset >> (EXCA_CARDMEM_ADDRX_SHIFT + 8)) & 151 EXCA_CARDMEM_ADDRX_MSB_ADDR_MASK) | 152 ((mem->kind == PCCARD_MEM_ATTR) ? 153 EXCA_CARDMEM_ADDRX_MSB_REGACTIVE_ATTR : 0)); 154 155 exca_setb(sc, EXCA_ADDRWIN_ENABLE, EXCA_ADDRWIN_ENABLE_MEMCS16 | 156 map->memenable); 157 158 DELAY(100); 159 #ifdef EXCA_DEBUG 160 { 161 int r1, r2, r3, r4, r5, r6, r7; 162 r1 = exca_read(sc, map->sysmem_start_msb); 163 r2 = exca_read(sc, map->sysmem_start_lsb); 164 r3 = exca_read(sc, map->sysmem_stop_msb); 165 r4 = exca_read(sc, map->sysmem_stop_lsb); 166 r5 = exca_read(sc, map->cardmem_msb); 167 r6 = exca_read(sc, map->cardmem_lsb); 168 r7 = exca_read(sc, map->sysmem_win); 169 printf("exca_do_mem_map window %d: %02x%02x %02x%02x " 170 "%02x%02x %02x (%08x+%08x.%08x*%08lx)\n", 171 win, r1, r2, r3, r4, r5, r6, r7, 172 mem->addr, mem->size, mem->realsize, 173 mem->offset); 174 } 175 #endif 176 } 177 178 /* 179 * public interface to map a resource. kind is the type of memory to 180 * map (either common or attribute). Memory created via this interface 181 * starts out at card address 0. Since the only way to set this is 182 * to set it on a struct resource after it has been mapped, we're safe 183 * in maping this assumption. Note that resources can be remapped using 184 * exca_do_mem_map so that's how the card address can be set later. 185 */ 186 int 187 exca_mem_map(struct exca_softc *sc, int kind, struct resource *res) 188 { 189 int win; 190 191 for (win = 0; win < EXCA_MEM_WINS; win++) { 192 if ((sc->memalloc & (1 << win)) == 0) { 193 sc->memalloc |= (1 << win); 194 break; 195 } 196 } 197 if (win >= EXCA_MEM_WINS) 198 return (1); 199 200 sc->mem[win].cardaddr = 0; 201 sc->mem[win].memt = rman_get_bustag(res); 202 sc->mem[win].memh = rman_get_bushandle(res); 203 sc->mem[win].addr = rman_get_start(res); 204 sc->mem[win].size = rman_get_end(res) - sc->mem[win].addr + 1; 205 sc->mem[win].realsize = sc->mem[win].size + EXCA_MEM_PAGESIZE - 1; 206 sc->mem[win].realsize = sc->mem[win].realsize - 207 (sc->mem[win].realsize % EXCA_MEM_PAGESIZE); 208 sc->mem[win].offset = (long)(sc->mem[win].addr); 209 sc->mem[win].kind = kind; 210 DPRINTF("exca_mem_map window %d bus %x+%x+%lx card addr %x\n", 211 win, sc->mem[win].addr, sc->mem[win].size, 212 sc->mem[win].offset, sc->mem[win].cardaddr); 213 exca_do_mem_map(sc, win); 214 215 return (0); 216 } 217 218 /* 219 * Private helper function. This turns off a given memory map that is in 220 * use. We do this by just clearing the enable bit in the pcic. If we needed 221 * to make memory unmapping/mapping pairs faster, we would have to store 222 * more state information about the pcic and then use that to intelligently 223 * to the map/unmap. However, since we don't do that sort of thing often 224 * (generally just at configure time), it isn't a case worth optimizing. 225 */ 226 static void 227 exca_mem_unmap(struct exca_softc *sc, int window) 228 { 229 if (window < 0 || window >= EXCA_MEM_WINS) 230 panic("exca_mem_unmap: window out of range"); 231 232 exca_clrb(sc, EXCA_ADDRWIN_ENABLE, mem_map_index[window].memenable); 233 sc->memalloc &= ~(1 << window); 234 } 235 236 /* 237 * Find the map that we're using to hold the resoruce. This works well 238 * so long as the client drivers don't do silly things like map the same 239 * area mutliple times, or map both common and attribute memory at the 240 * same time. This latter restriction is a bug. We likely should just 241 * store a pointer to the res in the mem[x] data structure. 242 */ 243 static int 244 exca_mem_findmap(struct exca_softc *sc, struct resource *res) 245 { 246 int win; 247 248 for (win = 0; win < EXCA_MEM_WINS; win++) { 249 if (sc->mem[win].memt == rman_get_bustag(res) && 250 sc->mem[win].addr == rman_get_start(res) && 251 sc->mem[win].size == rman_get_size(res)) 252 return (win); 253 } 254 return (-1); 255 } 256 257 /* 258 * Set the memory flag. This means that we are setting if the memory 259 * is coming from attribute memory or from common memory on the card. 260 * CIS entries are generally in attribute memory (although they can 261 * reside in common memory). Generally, this is the only use for attribute 262 * memory. However, some cards require their drivers to dance in both 263 * common and/or attribute memory and this interface (and setting the 264 * offset interface) exist for such cards. 265 */ 266 int 267 exca_mem_set_flags(struct exca_softc *sc, struct resource *res, uint32_t flags) 268 { 269 int win; 270 271 win = exca_mem_findmap(sc, res); 272 if (win < 0) { 273 device_printf(sc->dev, 274 "set_res_flags: specified resource not active\n"); 275 return (ENOENT); 276 } 277 278 sc->mem[win].kind = flags; 279 exca_do_mem_map(sc, win); 280 return (0); 281 } 282 283 /* 284 * Given a resource, go ahead and unmap it if we can find it in the 285 * resrouce list that's used. 286 */ 287 int 288 exca_mem_unmap_res(struct exca_softc *sc, struct resource *res) 289 { 290 int win; 291 292 win = exca_mem_findmap(sc, res); 293 if (win < 0) 294 return (ENOENT); 295 exca_mem_unmap(sc, win); 296 return (0); 297 } 298 299 /* 300 * Set the offset of the memory. We use this for reading the CIS and 301 * frobbing the pccard's pccard registers (POR, etc). Some drivers 302 * need to access this functionality as well, since they have receive 303 * buffers defined in the attribute memory. Thankfully, these cards 304 * are few and fare between. Some cards also have common memory that 305 * is large and only map a small portion of it at a time (but these cards 306 * are rare, the more common case being to have just a small amount 307 * of common memory that the driver needs to bcopy data from in order to 308 * get at it. 309 */ 310 int 311 exca_mem_set_offset(struct exca_softc *sc, struct resource *res, 312 uint32_t cardaddr, uint32_t *deltap) 313 { 314 int win; 315 uint32_t delta; 316 317 win = exca_mem_findmap(sc, res); 318 if (win < 0) { 319 device_printf(sc->dev, 320 "set_memory_offset: specified resource not active\n"); 321 return (ENOENT); 322 } 323 sc->mem[win].cardaddr = cardaddr; 324 delta = cardaddr % EXCA_MEM_PAGESIZE; 325 if (deltap) 326 *deltap = delta; 327 cardaddr -= delta; 328 sc->mem[win].realsize = sc->mem[win].size + delta + 329 EXCA_MEM_PAGESIZE - 1; 330 sc->mem[win].realsize = sc->mem[win].realsize - 331 (sc->mem[win].realsize % EXCA_MEM_PAGESIZE); 332 sc->mem[win].offset = cardaddr - sc->mem[win].addr; 333 exca_do_mem_map(sc, win); 334 return (0); 335 } 336 337 338 /* I/O */ 339 340 #define EXCA_IOINFO(NUM) { \ 341 EXCA_IOADDR ## NUM ## _START_LSB, \ 342 EXCA_IOADDR ## NUM ## _START_MSB, \ 343 EXCA_IOADDR ## NUM ## _STOP_LSB, \ 344 EXCA_IOADDR ## NUM ## _STOP_MSB, \ 345 EXCA_ADDRWIN_ENABLE_IO ## NUM ##, \ 346 EXCA_IOCTL_IO ## NUM ## _WAITSTATE \ 347 | EXCA_IOCTL_IO ## NUM ## _ZEROWAIT \ 348 | EXCA_IOCTL_IO ## NUM ## _IOCS16SRC_MASK \ 349 | EXCA_IOCTL_IO ## NUM ## _DATASIZE_MASK, \ 350 { \ 351 EXCA_IOCTL_IO ## NUM ## _IOCS16SRC_CARD, \ 352 EXCA_IOCTL_IO ## NUM ## _IOCS16SRC_DATASIZE \ 353 | EXCA_IOCTL_IO ## NUM ## _DATASIZE_8BIT, \ 354 EXCA_IOCTL_IO ## NUM ## _IOCS16SRC_DATASIZE \ 355 | EXCA_IOCTL_IO ## NUM ## _DATASIZE_16BIT, \ 356 } \ 357 } 358 359 static struct io_map_index_st { 360 int start_lsb; 361 int start_msb; 362 int stop_lsb; 363 int stop_msb; 364 int ioenable; 365 int ioctlmask; 366 int ioctlbits[3]; /* indexed by PCCARD_WIDTH_* */ 367 } io_map_index[] = { 368 EXCA_IOINFO(0), 369 EXCA_IOINFO(1), 370 }; 371 #undef EXCA_IOINFO 372 373 static void 374 exca_do_io_map(struct exca_softc *sc, int win) 375 { 376 struct io_map_index_st *map; 377 378 struct pccard_io_handle *io; 379 380 map = &io_map_index[win]; 381 io = &sc->io[win]; 382 exca_write(sc, map->start_lsb, io->addr & 0xff); 383 exca_write(sc, map->start_msb, (io->addr >> 8) & 0xff); 384 385 exca_write(sc, map->stop_lsb, (io->addr + io->size - 1) & 0xff); 386 exca_write(sc, map->stop_msb, ((io->addr + io->size - 1) >> 8) & 0xff); 387 388 exca_clrb(sc, EXCA_IOCTL, map->ioctlmask); 389 exca_setb(sc, EXCA_IOCTL, map->ioctlbits[io->width]); 390 391 exca_setb(sc, EXCA_ADDRWIN_ENABLE, map->ioenable); 392 #ifdef EXCA_DEBUG 393 { 394 int r1, r2, r3, r4; 395 r1 = exca_read(sc, map->start_msb); 396 r2 = exca_read(sc, map->start_lsb); 397 r3 = exca_read(sc, map->stop_msb); 398 r4 = exca_read(sc, map->stop_lsb); 399 DPRINTF("exca_do_io_map window %d: %02x%02x %02x%02x " 400 "(%08x+%08x)\n", win, r1, r2, r3, r4, 401 io->addr, io->size); 402 } 403 #endif 404 } 405 406 int 407 exca_io_map(struct exca_softc *sc, int width, struct resource *r) 408 { 409 int win; 410 #ifdef EXCA_DEBUG 411 static char *width_names[] = { "auto", "io8", "io16"}; 412 #endif 413 for (win=0; win < EXCA_IO_WINS; win++) { 414 if ((sc->ioalloc & (1 << win)) == 0) { 415 sc->ioalloc |= (1 << win); 416 break; 417 } 418 } 419 if (win >= EXCA_IO_WINS) 420 return (1); 421 422 sc->io[win].iot = rman_get_bustag(r); 423 sc->io[win].ioh = rman_get_bushandle(r); 424 sc->io[win].addr = rman_get_start(r); 425 sc->io[win].size = rman_get_end(r) - sc->io[win].addr + 1; 426 sc->io[win].flags = 0; 427 sc->io[win].width = width; 428 DPRINTF("exca_io_map window %d %s port %x+%x\n", 429 win, width_names[width], sc->io[win].addr, 430 sc->io[win].size); 431 exca_do_io_map(sc, win); 432 433 return (0); 434 } 435 436 static void 437 exca_io_unmap(struct exca_softc *sc, int window) 438 { 439 if (window >= EXCA_IO_WINS) 440 panic("exca_io_unmap: window out of range"); 441 442 exca_clrb(sc, EXCA_ADDRWIN_ENABLE, io_map_index[window].ioenable); 443 444 sc->ioalloc &= ~(1 << window); 445 446 sc->io[window].iot = 0; 447 sc->io[window].ioh = 0; 448 sc->io[window].addr = 0; 449 sc->io[window].size = 0; 450 sc->io[window].flags = 0; 451 sc->io[window].width = 0; 452 } 453 454 static int 455 exca_io_findmap(struct exca_softc *sc, struct resource *res) 456 { 457 int win; 458 459 for (win = 0; win < EXCA_IO_WINS; win++) { 460 if (sc->io[win].iot == rman_get_bustag(res) && 461 sc->io[win].addr == rman_get_start(res) && 462 sc->io[win].size == rman_get_size(res)) 463 return (win); 464 } 465 return (-1); 466 } 467 468 469 int 470 exca_io_unmap_res(struct exca_softc *sc, struct resource *res) 471 { 472 int win; 473 474 win = exca_io_findmap(sc, res); 475 if (win < 0) 476 return (ENOENT); 477 exca_io_unmap(sc, win); 478 return (0); 479 } 480 481 /* Misc */ 482 483 /* 484 * If interrupts are enabled, then we should be able to just wait for 485 * an interrupt routine to wake us up. Busy waiting shouldn't be 486 * necessary. Sadly, not all legacy ISA cards support an interrupt 487 * for the busy state transitions, at least according to their datasheets, 488 * so we busy wait a while here.. 489 */ 490 static void 491 exca_wait_ready(struct exca_softc *sc) 492 { 493 int i; 494 DEVPRINTF(sc->dev, "exca_wait_ready: status 0x%02x\n", 495 exca_read(sc, EXCA_IF_STATUS)); 496 for (i = 0; i < 10000; i++) { 497 if (exca_read(sc, EXCA_IF_STATUS) & EXCA_IF_STATUS_READY) 498 return; 499 DELAY(500); 500 } 501 device_printf(sc->dev, "ready never happened, status = %02x\n", 502 exca_read(sc, EXCA_IF_STATUS)); 503 } 504 505 /* 506 * Reset the card. Ideally, we'd do a lot of this via interrupts. 507 * However, many PC Cards will deassert the ready signal. This means 508 * that they are asserting an interrupt. This makes it hard to 509 * do anything but a busy wait here. One could argue that these 510 * such cards are broken, or that the bridge that allows this sort 511 * of interrupt through isn't quite what you'd want (and may be a standards 512 * violation). However, such arguing would leave a huge class of pc cards 513 * and bridges out of reach for 514 */ 515 void 516 exca_reset(struct exca_softc *sc, device_t child) 517 { 518 int cardtype; 519 int win; 520 521 /* enable socket i/o */ 522 exca_setb(sc, EXCA_PWRCTL, EXCA_PWRCTL_OE); 523 524 exca_write(sc, EXCA_INTR, EXCA_INTR_ENABLE); 525 /* hold reset for 30ms */ 526 DELAY(30*1000); 527 /* clear the reset flag */ 528 exca_setb(sc, EXCA_INTR, EXCA_INTR_RESET); 529 /* wait 20ms as per pc card standard (r2.01) section 4.3.6 */ 530 DELAY(20*1000); 531 532 exca_wait_ready(sc); 533 534 /* disable all address windows */ 535 exca_write(sc, EXCA_ADDRWIN_ENABLE, 0); 536 537 CARD_GET_TYPE(child, &cardtype); 538 exca_setb(sc, EXCA_INTR, (cardtype == PCCARD_IFTYPE_IO) ? 539 EXCA_INTR_CARDTYPE_IO : EXCA_INTR_CARDTYPE_MEM); 540 DEVPRINTF(sc->dev, "card type is %s\n", 541 (cardtype == PCCARD_IFTYPE_IO) ? "io" : "mem"); 542 543 /* reinstall all the memory and io mappings */ 544 for (win = 0; win < EXCA_MEM_WINS; ++win) 545 if (sc->memalloc & (1 << win)) 546 exca_do_mem_map(sc, win); 547 for (win = 0; win < EXCA_IO_WINS; ++win) 548 if (sc->ioalloc & (1 << win)) 549 exca_do_io_map(sc, win); 550 } 551 552 /* 553 * Initialize the exca_softc data structure for the first time. 554 */ 555 void 556 exca_init(struct exca_softc *sc, device_t dev, exca_write_t *wrfn, 557 exca_read_t *rdfn, bus_space_tag_t bst, bus_space_handle_t bsh, 558 uint32_t offset) 559 { 560 sc->dev = dev; 561 sc->write_exca = wrfn; 562 sc->read_exca = rdfn; 563 sc->memalloc = 0; 564 sc->ioalloc = 0; 565 sc->bst = bst; 566 sc->bsh = bsh; 567 sc->offset = offset; 568 sc->flags = 0; 569 } 570 571 /* 572 * Probe the expected slots. We maybe should set the ID for each of these 573 * slots too while we're at it. But maybe that belongs to a separate 574 * function. 575 * 576 * Callers must charantee that there are at least EXCA_NSLOTS (4) in 577 * the array that they pass the address of the first element in the 578 * "exca" parameter. 579 */ 580 int 581 exca_probe_slots(device_t dev, struct exca_softc *exca, exca_write_t writefnp, 582 exca_read_t readfnp) 583 { 584 int rid; 585 struct resource *res; 586 int err; 587 bus_space_tag_t iot; 588 bus_space_handle_t ioh; 589 int i; 590 591 err = ENXIO; 592 rid = 0; 593 res = bus_alloc_resource(dev, SYS_RES_IOPORT, &rid, 0, ~0, EXCA_IOSIZE, 594 RF_ACTIVE); 595 if (res == NULL) 596 return (ENXIO); 597 iot = rman_get_bustag(res); 598 ioh = rman_get_bushandle(res); 599 for (i = 0; i < EXCA_NSLOTS; i++) { 600 exca_init(&exca[i], dev, writefnp, readfnp, iot, ioh, 601 i * EXCA_SOCKET_SIZE); 602 if (exca_is_pcic(&exca[i])) { 603 err = 0; 604 exca[i].flags |= EXCA_SOCKET_PRESENT; 605 } 606 } 607 bus_release_resource(dev, SYS_RES_IOPORT, rid, res); 608 return (err); 609 } 610 611 int 612 exca_is_pcic(struct exca_softc *sc) 613 { 614 /* XXX */ 615 return (0); 616 } 617