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 #define EXCA_DEBUG 76 #ifdef EXCA_DEBUG 77 #define DEVPRINTF(dev, fmt, args...) device_printf((dev), (fmt), ## args) 78 #define DPRINTF(fmt, args...) printf(fmt, ## args) 79 #else 80 #define DEVPRINTF(dev, fmt, args...) 81 #define DPRINTF(fmt, args...) 82 #endif 83 84 85 /* memory */ 86 87 #define EXCA_MEMINFO(NUM) { \ 88 EXCA_SYSMEM_ADDR ## NUM ## _START_LSB, \ 89 EXCA_SYSMEM_ADDR ## NUM ## _START_MSB, \ 90 EXCA_SYSMEM_ADDR ## NUM ## _STOP_LSB, \ 91 EXCA_SYSMEM_ADDR ## NUM ## _STOP_MSB, \ 92 EXCA_SYSMEM_ADDR ## NUM ## _WIN, \ 93 EXCA_CARDMEM_ADDR ## NUM ## _LSB, \ 94 EXCA_CARDMEM_ADDR ## NUM ## _MSB, \ 95 EXCA_ADDRWIN_ENABLE_MEM ## NUM ##, \ 96 } 97 98 static struct mem_map_index_st { 99 int sysmem_start_lsb; 100 int sysmem_start_msb; 101 int sysmem_stop_lsb; 102 int sysmem_stop_msb; 103 int sysmem_win; 104 int cardmem_lsb; 105 int cardmem_msb; 106 int memenable; 107 } mem_map_index[] = { 108 EXCA_MEMINFO(0), 109 EXCA_MEMINFO(1), 110 EXCA_MEMINFO(2), 111 EXCA_MEMINFO(3), 112 EXCA_MEMINFO(4) 113 }; 114 #undef EXCA_MEMINFO 115 116 /* 117 * Helper function. This will map the requested memory slot. We setup the 118 * map before we call this function. This is used to initially force the 119 * mapping, as well as later restore the mapping after it has been destroyed 120 * in some fashion (due to a power event typically). 121 */ 122 static void 123 exca_do_mem_map(struct exca_softc *sc, int win) 124 { 125 struct mem_map_index_st *map; 126 struct pccard_mem_handle *mem; 127 128 map = &mem_map_index[win]; 129 mem = &sc->mem[win]; 130 exca_write(sc, map->sysmem_start_lsb, 131 (mem->addr >> EXCA_SYSMEM_ADDRX_SHIFT) & 0xff); 132 exca_write(sc, map->sysmem_start_msb, 133 ((mem->addr >> (EXCA_SYSMEM_ADDRX_SHIFT + 8)) & 134 EXCA_SYSMEM_ADDRX_START_MSB_ADDR_MASK) | 0x80); 135 136 exca_write(sc, map->sysmem_stop_lsb, 137 ((mem->addr + mem->realsize - 1) >> 138 EXCA_SYSMEM_ADDRX_SHIFT) & 0xff); 139 exca_write(sc, map->sysmem_stop_msb, 140 (((mem->addr + mem->realsize - 1) >> 141 (EXCA_SYSMEM_ADDRX_SHIFT + 8)) & 142 EXCA_SYSMEM_ADDRX_STOP_MSB_ADDR_MASK) | 143 EXCA_SYSMEM_ADDRX_STOP_MSB_WAIT2); 144 145 exca_write(sc, map->sysmem_win, 146 (mem->addr >> EXCA_MEMREG_WIN_SHIFT) & 0xff); 147 148 exca_write(sc, map->cardmem_lsb, 149 (mem->offset >> EXCA_CARDMEM_ADDRX_SHIFT) & 0xff); 150 exca_write(sc, map->cardmem_msb, 151 ((mem->offset >> (EXCA_CARDMEM_ADDRX_SHIFT + 8)) & 152 EXCA_CARDMEM_ADDRX_MSB_ADDR_MASK) | 153 ((mem->kind == PCCARD_MEM_ATTR) ? 154 EXCA_CARDMEM_ADDRX_MSB_REGACTIVE_ATTR : 0)); 155 156 exca_setb(sc, EXCA_ADDRWIN_ENABLE, EXCA_ADDRWIN_ENABLE_MEMCS16 | 157 map->memenable); 158 159 DELAY(100); 160 #ifdef EXCA_DEBUG 161 { 162 int r1, r2, r3, r4, r5, r6, r7; 163 r1 = exca_read(sc, map->sysmem_start_msb); 164 r2 = exca_read(sc, map->sysmem_start_lsb); 165 r3 = exca_read(sc, map->sysmem_stop_msb); 166 r4 = exca_read(sc, map->sysmem_stop_lsb); 167 r5 = exca_read(sc, map->cardmem_msb); 168 r6 = exca_read(sc, map->cardmem_lsb); 169 r7 = exca_read(sc, map->sysmem_win); 170 printf("exca_do_mem_map window %d: %02x%02x %02x%02x " 171 "%02x%02x %02x (%08x+%08x.%08x*%08lx)\n", 172 win, r1, r2, r3, r4, r5, r6, r7, 173 mem->addr, mem->size, mem->realsize, 174 mem->offset); 175 } 176 #endif 177 } 178 179 /* 180 * public interface to map a resource. kind is the type of memory to 181 * map (either common or attribute). Memory created via this interface 182 * starts out at card address 0. Since the only way to set this is 183 * to set it on a struct resource after it has been mapped, we're safe 184 * in maping this assumption. Note that resources can be remapped using 185 * exca_do_mem_map so that's how the card address can be set later. 186 */ 187 int 188 exca_mem_map(struct exca_softc *sc, int kind, struct resource *res) 189 { 190 int win; 191 192 for (win = 0; win < EXCA_MEM_WINS; win++) { 193 if ((sc->memalloc & (1 << win)) == 0) { 194 sc->memalloc |= (1 << win); 195 break; 196 } 197 } 198 if (win >= EXCA_MEM_WINS) 199 return (1); 200 201 sc->mem[win].cardaddr = 0; 202 sc->mem[win].memt = rman_get_bustag(res); 203 sc->mem[win].memh = rman_get_bushandle(res); 204 sc->mem[win].addr = rman_get_start(res); 205 sc->mem[win].size = rman_get_end(res) - sc->mem[win].addr + 1; 206 sc->mem[win].realsize = sc->mem[win].size + EXCA_MEM_PAGESIZE - 1; 207 sc->mem[win].realsize = sc->mem[win].realsize - 208 (sc->mem[win].realsize % EXCA_MEM_PAGESIZE); 209 sc->mem[win].offset = (long)(sc->mem[win].addr); 210 sc->mem[win].kind = kind; 211 DPRINTF("exca_mem_map window %d bus %x+%x+%lx card addr %x\n", 212 win, sc->mem[win].addr, sc->mem[win].size, 213 sc->mem[win].offset, sc->mem[win].cardaddr); 214 exca_do_mem_map(sc, win); 215 216 return (0); 217 } 218 219 /* 220 * Private helper function. This turns off a given memory map that is in 221 * use. We do this by just clearing the enable bit in the pcic. If we needed 222 * to make memory unmapping/mapping pairs faster, we would have to store 223 * more state information about the pcic and then use that to intelligently 224 * to the map/unmap. However, since we don't do that sort of thing often 225 * (generally just at configure time), it isn't a case worth optimizing. 226 */ 227 static void 228 exca_mem_unmap(struct exca_softc *sc, int window) 229 { 230 if (window < 0 || window >= EXCA_MEM_WINS) 231 panic("exca_mem_unmap: window out of range"); 232 233 exca_clrb(sc, EXCA_ADDRWIN_ENABLE, mem_map_index[window].memenable); 234 sc->memalloc &= ~(1 << window); 235 } 236 237 /* 238 * Find the map that we're using to hold the resoruce. This works well 239 * so long as the client drivers don't do silly things like map the same 240 * area mutliple times, or map both common and attribute memory at the 241 * same time. This latter restriction is a bug. We likely should just 242 * store a pointer to the res in the mem[x] data structure. 243 */ 244 static int 245 exca_mem_findmap(struct exca_softc *sc, struct resource *res) 246 { 247 int win; 248 249 for (win = 0; win < EXCA_MEM_WINS; win++) { 250 if (sc->mem[win].memt == rman_get_bustag(res) && 251 sc->mem[win].addr == rman_get_start(res) && 252 sc->mem[win].size == rman_get_size(res)) 253 return (win); 254 } 255 return (-1); 256 } 257 258 /* 259 * Set the memory flag. This means that we are setting if the memory 260 * is coming from attribute memory or from common memory on the card. 261 * CIS entries are generally in attribute memory (although they can 262 * reside in common memory). Generally, this is the only use for attribute 263 * memory. However, some cards require their drivers to dance in both 264 * common and/or attribute memory and this interface (and setting the 265 * offset interface) exist for such cards. 266 */ 267 int 268 exca_mem_set_flags(struct exca_softc *sc, struct resource *res, uint32_t flags) 269 { 270 int win; 271 272 win = exca_mem_findmap(sc, res); 273 if (win < 0) { 274 device_printf(sc->dev, 275 "set_res_flags: specified resource not active\n"); 276 return (ENOENT); 277 } 278 279 sc->mem[win].kind = flags; 280 exca_do_mem_map(sc, win); 281 return (0); 282 } 283 284 /* 285 * Given a resource, go ahead and unmap it if we can find it in the 286 * resrouce list that's used. 287 */ 288 int 289 exca_mem_unmap_res(struct exca_softc *sc, struct resource *res) 290 { 291 int win; 292 293 win = exca_mem_findmap(sc, res); 294 if (win < 0) 295 return (ENOENT); 296 exca_mem_unmap(sc, win); 297 return (0); 298 } 299 300 /* 301 * Set the offset of the memory. We use this for reading the CIS and 302 * frobbing the pccard's pccard registers (POR, etc). Some drivers 303 * need to access this functionality as well, since they have receive 304 * buffers defined in the attribute memory. Thankfully, these cards 305 * are few and fare between. Some cards also have common memory that 306 * is large and only map a small portion of it at a time (but these cards 307 * are rare, the more common case being to have just a small amount 308 * of common memory that the driver needs to bcopy data from in order to 309 * get at it. 310 */ 311 int 312 exca_mem_set_offset(struct exca_softc *sc, struct resource *res, 313 uint32_t cardaddr, uint32_t *deltap) 314 { 315 int win; 316 uint32_t delta; 317 318 win = exca_mem_findmap(sc, res); 319 if (win < 0) { 320 device_printf(sc->dev, 321 "set_memory_offset: specified resource not active\n"); 322 return (ENOENT); 323 } 324 sc->mem[win].cardaddr = cardaddr; 325 delta = cardaddr % EXCA_MEM_PAGESIZE; 326 if (deltap) 327 *deltap = delta; 328 cardaddr -= delta; 329 sc->mem[win].realsize = sc->mem[win].size + delta + 330 EXCA_MEM_PAGESIZE - 1; 331 sc->mem[win].realsize = sc->mem[win].realsize - 332 (sc->mem[win].realsize % EXCA_MEM_PAGESIZE); 333 sc->mem[win].offset = cardaddr - sc->mem[win].addr; 334 exca_do_mem_map(sc, win); 335 return (0); 336 } 337 338 339 /* I/O */ 340 341 #define EXCA_IOINFO(NUM) { \ 342 EXCA_IOADDR ## NUM ## _START_LSB, \ 343 EXCA_IOADDR ## NUM ## _START_MSB, \ 344 EXCA_IOADDR ## NUM ## _STOP_LSB, \ 345 EXCA_IOADDR ## NUM ## _STOP_MSB, \ 346 EXCA_ADDRWIN_ENABLE_IO ## NUM ##, \ 347 EXCA_IOCTL_IO ## NUM ## _WAITSTATE \ 348 | EXCA_IOCTL_IO ## NUM ## _ZEROWAIT \ 349 | EXCA_IOCTL_IO ## NUM ## _IOCS16SRC_MASK \ 350 | EXCA_IOCTL_IO ## NUM ## _DATASIZE_MASK, \ 351 { \ 352 EXCA_IOCTL_IO ## NUM ## _IOCS16SRC_CARD, \ 353 EXCA_IOCTL_IO ## NUM ## _IOCS16SRC_DATASIZE \ 354 | EXCA_IOCTL_IO ## NUM ## _DATASIZE_8BIT, \ 355 EXCA_IOCTL_IO ## NUM ## _IOCS16SRC_DATASIZE \ 356 | EXCA_IOCTL_IO ## NUM ## _DATASIZE_16BIT, \ 357 } \ 358 } 359 360 static struct io_map_index_st { 361 int start_lsb; 362 int start_msb; 363 int stop_lsb; 364 int stop_msb; 365 int ioenable; 366 int ioctlmask; 367 int ioctlbits[3]; /* indexed by PCCARD_WIDTH_* */ 368 } io_map_index[] = { 369 EXCA_IOINFO(0), 370 EXCA_IOINFO(1), 371 }; 372 #undef EXCA_IOINFO 373 374 static void 375 exca_do_io_map(struct exca_softc *sc, int win) 376 { 377 struct io_map_index_st *map; 378 379 struct pccard_io_handle *io; 380 381 map = &io_map_index[win]; 382 io = &sc->io[win]; 383 exca_write(sc, map->start_lsb, io->addr & 0xff); 384 exca_write(sc, map->start_msb, (io->addr >> 8) & 0xff); 385 386 exca_write(sc, map->stop_lsb, (io->addr + io->size - 1) & 0xff); 387 exca_write(sc, map->stop_msb, ((io->addr + io->size - 1) >> 8) & 0xff); 388 389 exca_clrb(sc, EXCA_IOCTL, map->ioctlmask); 390 exca_setb(sc, EXCA_IOCTL, map->ioctlbits[io->width]); 391 392 exca_setb(sc, EXCA_ADDRWIN_ENABLE, map->ioenable); 393 #ifdef EXCA_DEBUG 394 { 395 int r1, r2, r3, r4; 396 r1 = exca_read(sc, map->start_msb); 397 r2 = exca_read(sc, map->start_lsb); 398 r3 = exca_read(sc, map->stop_msb); 399 r4 = exca_read(sc, map->stop_lsb); 400 DPRINTF("exca_do_io_map window %d: %02x%02x %02x%02x " 401 "(%08x+%08x)\n", win, r1, r2, r3, r4, 402 io->addr, io->size); 403 } 404 #endif 405 } 406 407 int 408 exca_io_map(struct exca_softc *sc, int width, struct resource *r) 409 { 410 int win; 411 #ifdef EXCA_DEBUG 412 static char *width_names[] = { "auto", "io8", "io16"}; 413 #endif 414 for (win=0; win < EXCA_IO_WINS; win++) { 415 if ((sc->ioalloc & (1 << win)) == 0) { 416 sc->ioalloc |= (1 << win); 417 break; 418 } 419 } 420 if (win >= EXCA_IO_WINS) 421 return (1); 422 423 sc->io[win].iot = rman_get_bustag(r); 424 sc->io[win].ioh = rman_get_bushandle(r); 425 sc->io[win].addr = rman_get_start(r); 426 sc->io[win].size = rman_get_end(r) - sc->io[win].addr + 1; 427 sc->io[win].flags = 0; 428 sc->io[win].width = width; 429 DPRINTF("exca_io_map window %d %s port %x+%x\n", 430 win, width_names[width], sc->io[win].addr, 431 sc->io[win].size); 432 exca_do_io_map(sc, win); 433 434 return (0); 435 } 436 437 static void 438 exca_io_unmap(struct exca_softc *sc, int window) 439 { 440 if (window >= EXCA_IO_WINS) 441 panic("exca_io_unmap: window out of range"); 442 443 exca_clrb(sc, EXCA_ADDRWIN_ENABLE, io_map_index[window].ioenable); 444 445 sc->ioalloc &= ~(1 << window); 446 447 sc->io[window].iot = 0; 448 sc->io[window].ioh = 0; 449 sc->io[window].addr = 0; 450 sc->io[window].size = 0; 451 sc->io[window].flags = 0; 452 sc->io[window].width = 0; 453 } 454 455 static int 456 exca_io_findmap(struct exca_softc *sc, struct resource *res) 457 { 458 int win; 459 460 for (win = 0; win < EXCA_IO_WINS; win++) { 461 if (sc->io[win].iot == rman_get_bustag(res) && 462 sc->io[win].addr == rman_get_start(res) && 463 sc->io[win].size == rman_get_size(res)) 464 return (win); 465 } 466 return (-1); 467 } 468 469 470 int 471 exca_io_unmap_res(struct exca_softc *sc, struct resource *res) 472 { 473 int win; 474 475 win = exca_io_findmap(sc, res); 476 if (win < 0) 477 return (ENOENT); 478 exca_io_unmap(sc, win); 479 return (0); 480 } 481 482 /* Misc */ 483 484 /* 485 * If interrupts are enabled, then we should be able to just wait for 486 * an interrupt routine to wake us up. Busy waiting shouldn't be 487 * necessary. Sadly, not all legacy ISA cards support an interrupt 488 * for the busy state transitions, at least according to their datasheets, 489 * so we busy wait a while here.. 490 */ 491 static void 492 exca_wait_ready(struct exca_softc *sc) 493 { 494 int i; 495 DEVPRINTF(sc->dev, "exca_wait_ready: status 0x%02x\n", 496 exca_read(sc, EXCA_IF_STATUS)); 497 for (i = 0; i < 10000; i++) { 498 if (exca_read(sc, EXCA_IF_STATUS) & EXCA_IF_STATUS_READY) 499 return; 500 DELAY(500); 501 } 502 device_printf(sc->dev, "ready never happened, status = %02x\n", 503 exca_read(sc, EXCA_IF_STATUS)); 504 } 505 506 /* 507 * Reset the card. Ideally, we'd do a lot of this via interrupts. 508 * However, many PC Cards will deassert the ready signal. This means 509 * that they are asserting an interrupt. This makes it hard to 510 * do anything but a busy wait here. One could argue that these 511 * such cards are broken, or that the bridge that allows this sort 512 * of interrupt through isn't quite what you'd want (and may be a standards 513 * violation). However, such arguing would leave a huge class of pc cards 514 * and bridges out of reach for 515 */ 516 void 517 exca_reset(struct exca_softc *sc, device_t child) 518 { 519 int cardtype; 520 int win; 521 522 /* enable socket i/o */ 523 exca_setb(sc, EXCA_PWRCTL, EXCA_PWRCTL_OE); 524 525 exca_write(sc, EXCA_INTR, EXCA_INTR_ENABLE); 526 /* hold reset for 30ms */ 527 DELAY(30*1000); 528 /* clear the reset flag */ 529 exca_setb(sc, EXCA_INTR, EXCA_INTR_RESET); 530 /* wait 20ms as per pc card standard (r2.01) section 4.3.6 */ 531 DELAY(20*1000); 532 533 exca_wait_ready(sc); 534 535 /* disable all address windows */ 536 exca_write(sc, EXCA_ADDRWIN_ENABLE, 0); 537 538 CARD_GET_TYPE(child, &cardtype); 539 exca_setb(sc, EXCA_INTR, (cardtype == PCCARD_IFTYPE_IO) ? 540 EXCA_INTR_CARDTYPE_IO : EXCA_INTR_CARDTYPE_MEM); 541 DEVPRINTF(sc->dev, "card type is %s\n", 542 (cardtype == PCCARD_IFTYPE_IO) ? "io" : "mem"); 543 544 /* reinstall all the memory and io mappings */ 545 for (win = 0; win < EXCA_MEM_WINS; ++win) 546 if (sc->memalloc & (1 << win)) 547 exca_do_mem_map(sc, win); 548 for (win = 0; win < EXCA_IO_WINS; ++win) 549 if (sc->ioalloc & (1 << win)) 550 exca_do_io_map(sc, win); 551 } 552 553 /* 554 * Initialize the exca_softc data structure for the first time. 555 */ 556 void 557 exca_init(struct exca_softc *sc, device_t dev, exca_write_t *wrfn, 558 exca_read_t *rdfn, bus_space_tag_t bst, bus_space_handle_t bsh, 559 uint32_t offset) 560 { 561 sc->dev = dev; 562 sc->write_exca = wrfn; 563 sc->read_exca = rdfn; 564 sc->memalloc = 0; 565 sc->ioalloc = 0; 566 sc->bst = bst; 567 sc->bsh = bsh; 568 sc->offset = offset; 569 sc->flags = 0; 570 } 571 572 /* 573 * Probe the expected slots. We maybe should set the ID for each of these 574 * slots too while we're at it. But maybe that belongs to a separate 575 * function. 576 * 577 * Callers must charantee that there are at least EXCA_NSLOTS (4) in 578 * the array that they pass the address of the first element in the 579 * "exca" parameter. 580 */ 581 int 582 exca_probe_slots(device_t dev, struct exca_softc *exca, exca_write_t writefnp, 583 exca_read_t readfnp) 584 { 585 int rid; 586 struct resource *res; 587 int err; 588 bus_space_tag_t iot; 589 bus_space_handle_t ioh; 590 int i; 591 592 err = ENXIO; 593 rid = 0; 594 res = bus_alloc_resource(dev, SYS_RES_IOPORT, &rid, 0, ~0, EXCA_IOSIZE, 595 RF_ACTIVE); 596 if (res == NULL) 597 return (ENXIO); 598 iot = rman_get_bustag(res); 599 ioh = rman_get_bushandle(res); 600 for (i = 0; i < EXCA_NSLOTS; i++) { 601 exca_init(&exca[i], dev, writefnp, readfnp, iot, ioh, 602 i * EXCA_SOCKET_SIZE); 603 if (exca_is_pcic(&exca[i])) { 604 err = 0; 605 exca[i].flags |= EXCA_SOCKET_PRESENT; 606 } 607 } 608 bus_release_resource(dev, SYS_RES_IOPORT, rid, res); 609 return (err); 610 } 611 612 int 613 exca_is_pcic(struct exca_softc *sc) 614 { 615 /* XXX */ 616 return (0); 617 } 618