1 /* $FreeBSD: src/sys/dev/exca/exca.c,v 1.6 2002/10/07 06:18:50 imp Exp $ */ 2 /* $DragonFly: src/sys/dev/pccard/exca/exca.c,v 1.1 2004/02/10 07:55:47 joerg Exp $ */ 3 4 /* 5 * Copyright (c) 2002 M Warner Losh. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 21 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 22 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 23 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 25 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 26 * 27 * This software may be derived from NetBSD i82365.c and other files with 28 * the following copyright: 29 * 30 * Copyright (c) 1997 Marc Horowitz. All rights reserved. 31 * 32 * Redistribution and use in source and binary forms, with or without 33 * modification, are permitted provided that the following conditions 34 * are met: 35 * 1. Redistributions of source code must retain the above copyright 36 * notice, this list of conditions and the following disclaimer. 37 * 2. Redistributions in binary form must reproduce the above copyright 38 * notice, this list of conditions and the following disclaimer in the 39 * documentation and/or other materials provided with the distribution. 40 * 3. All advertising materials mentioning features or use of this software 41 * must display the following acknowledgement: 42 * This product includes software developed by Marc Horowitz. 43 * 4. The name of the author may not be used to endorse or promote products 44 * derived from this software without specific prior written permission. 45 * 46 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 47 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 48 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 49 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 50 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 51 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 52 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 53 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 54 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 55 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 56 */ 57 58 #include <sys/param.h> 59 #include <sys/systm.h> 60 #include <sys/errno.h> 61 #include <sys/kernel.h> 62 #include <sys/malloc.h> 63 #include <sys/queue.h> 64 #include <sys/module.h> 65 #include <sys/conf.h> 66 67 #include <sys/bus.h> 68 #include <machine/bus.h> 69 #include <sys/rman.h> 70 #include <machine/resource.h> 71 72 #include <bus/pccard/pccardreg.h> 73 #include <bus/pccard/pccardvar.h> 74 75 #include <dev/pccard/exca/excareg.h> 76 #include <dev/pccard/exca/excavar.h> 77 78 #ifdef EXCA_DEBUG 79 #define DEVPRINTF(dev, fmt, args...) device_printf((dev), (fmt), ## args) 80 #define DPRINTF(fmt, args...) printf(fmt, ## args) 81 #else 82 #define DEVPRINTF(dev, fmt, args...) 83 #define DPRINTF(fmt, args...) 84 #endif 85 86 /* memory */ 87 88 #define EXCA_MEMINFO(NUM) { \ 89 EXCA_SYSMEM_ADDR ## NUM ## _START_LSB, \ 90 EXCA_SYSMEM_ADDR ## NUM ## _START_MSB, \ 91 EXCA_SYSMEM_ADDR ## NUM ## _STOP_LSB, \ 92 EXCA_SYSMEM_ADDR ## NUM ## _STOP_MSB, \ 93 EXCA_SYSMEM_ADDR ## NUM ## _WIN, \ 94 EXCA_CARDMEM_ADDR ## NUM ## _LSB, \ 95 EXCA_CARDMEM_ADDR ## NUM ## _MSB, \ 96 EXCA_ADDRWIN_ENABLE_MEM ## NUM, \ 97 } 98 99 static struct mem_map_index_st { 100 int sysmem_start_lsb; 101 int sysmem_start_msb; 102 int sysmem_stop_lsb; 103 int sysmem_stop_msb; 104 int sysmem_win; 105 int cardmem_lsb; 106 int cardmem_msb; 107 int memenable; 108 } mem_map_index[] = { 109 EXCA_MEMINFO(0), 110 EXCA_MEMINFO(1), 111 EXCA_MEMINFO(2), 112 EXCA_MEMINFO(3), 113 EXCA_MEMINFO(4) 114 }; 115 #undef EXCA_MEMINFO 116 117 /* 118 * Helper function. This will map the requested memory slot. We setup the 119 * map before we call this function. This is used to initially force the 120 * mapping, as well as later restore the mapping after it has been destroyed 121 * in some fashion (due to a power event typically). 122 */ 123 static void 124 exca_do_mem_map(struct exca_softc *sc, int win) 125 { 126 struct mem_map_index_st *map; 127 struct pccard_mem_handle *mem; 128 129 map = &mem_map_index[win]; 130 mem = &sc->mem[win]; 131 exca_write(sc, map->sysmem_start_lsb, 132 (mem->addr >> EXCA_SYSMEM_ADDRX_SHIFT) & 0xff); 133 exca_write(sc, map->sysmem_start_msb, 134 ((mem->addr >> (EXCA_SYSMEM_ADDRX_SHIFT + 8)) & 135 EXCA_SYSMEM_ADDRX_START_MSB_ADDR_MASK) | 0x80); 136 137 exca_write(sc, map->sysmem_stop_lsb, 138 ((mem->addr + mem->realsize - 1) >> 139 EXCA_SYSMEM_ADDRX_SHIFT) & 0xff); 140 exca_write(sc, map->sysmem_stop_msb, 141 (((mem->addr + mem->realsize - 1) >> 142 (EXCA_SYSMEM_ADDRX_SHIFT + 8)) & 143 EXCA_SYSMEM_ADDRX_STOP_MSB_ADDR_MASK) | 144 EXCA_SYSMEM_ADDRX_STOP_MSB_WAIT2); 145 146 exca_write(sc, map->sysmem_win, 147 (mem->addr >> EXCA_MEMREG_WIN_SHIFT) & 0xff); 148 149 exca_write(sc, map->cardmem_lsb, 150 (mem->offset >> EXCA_CARDMEM_ADDRX_SHIFT) & 0xff); 151 exca_write(sc, map->cardmem_msb, 152 ((mem->offset >> (EXCA_CARDMEM_ADDRX_SHIFT + 8)) & 153 EXCA_CARDMEM_ADDRX_MSB_ADDR_MASK) | 154 ((mem->kind == PCCARD_MEM_ATTR) ? 155 EXCA_CARDMEM_ADDRX_MSB_REGACTIVE_ATTR : 0)); 156 157 exca_setb(sc, EXCA_ADDRWIN_ENABLE, EXCA_ADDRWIN_ENABLE_MEMCS16 | 158 map->memenable); 159 160 DELAY(100); 161 #ifdef EXCA_DEBUG 162 { 163 int r1, r2, r3, r4, r5, r6, r7; 164 r1 = exca_read(sc, map->sysmem_start_msb); 165 r2 = exca_read(sc, map->sysmem_start_lsb); 166 r3 = exca_read(sc, map->sysmem_stop_msb); 167 r4 = exca_read(sc, map->sysmem_stop_lsb); 168 r5 = exca_read(sc, map->cardmem_msb); 169 r6 = exca_read(sc, map->cardmem_lsb); 170 r7 = exca_read(sc, map->sysmem_win); 171 printf("exca_do_mem_map window %d: %02x%02x %02x%02x " 172 "%02x%02x %02x (%08x+%08x.%08x*%08lx)\n", 173 win, r1, r2, r3, r4, r5, r6, r7, 174 mem->addr, mem->size, mem->realsize, 175 mem->offset); 176 } 177 #endif 178 } 179 180 /* 181 * public interface to map a resource. kind is the type of memory to 182 * map (either common or attribute). Memory created via this interface 183 * starts out at card address 0. Since the only way to set this is 184 * to set it on a struct resource after it has been mapped, we're safe 185 * in maping this assumption. Note that resources can be remapped using 186 * exca_do_mem_map so that's how the card address can be set later. 187 */ 188 int 189 exca_mem_map(struct exca_softc *sc, int kind, struct resource *res) 190 { 191 int win; 192 193 for (win = 0; win < EXCA_MEM_WINS; win++) { 194 if ((sc->memalloc & (1 << win)) == 0) { 195 sc->memalloc |= (1 << win); 196 break; 197 } 198 } 199 if (win >= EXCA_MEM_WINS) 200 return (1); 201 if (((rman_get_start(res) >> EXCA_CARDMEM_ADDRX_SHIFT) & 0xff) != 0 && 202 (sc->flags & EXCA_HAS_MEMREG_WIN) == 0) { 203 device_printf(sc->dev, "Does not support mapping above 24M."); 204 return (1); 205 } 206 207 sc->mem[win].cardaddr = 0; 208 sc->mem[win].memt = rman_get_bustag(res); 209 sc->mem[win].memh = rman_get_bushandle(res); 210 sc->mem[win].addr = rman_get_start(res); 211 sc->mem[win].size = rman_get_end(res) - sc->mem[win].addr + 1; 212 sc->mem[win].realsize = sc->mem[win].size + EXCA_MEM_PAGESIZE - 1; 213 sc->mem[win].realsize = sc->mem[win].realsize - 214 (sc->mem[win].realsize % EXCA_MEM_PAGESIZE); 215 sc->mem[win].offset = (long)(sc->mem[win].addr); 216 sc->mem[win].kind = kind; 217 DPRINTF("exca_mem_map window %d bus %x+%x+%lx card addr %x\n", 218 win, sc->mem[win].addr, sc->mem[win].size, 219 sc->mem[win].offset, sc->mem[win].cardaddr); 220 exca_do_mem_map(sc, win); 221 222 return (0); 223 } 224 225 /* 226 * Private helper function. This turns off a given memory map that is in 227 * use. We do this by just clearing the enable bit in the pcic. If we needed 228 * to make memory unmapping/mapping pairs faster, we would have to store 229 * more state information about the pcic and then use that to intelligently 230 * to the map/unmap. However, since we don't do that sort of thing often 231 * (generally just at configure time), it isn't a case worth optimizing. 232 */ 233 static void 234 exca_mem_unmap(struct exca_softc *sc, int window) 235 { 236 if (window < 0 || window >= EXCA_MEM_WINS) 237 panic("exca_mem_unmap: window out of range"); 238 239 exca_clrb(sc, EXCA_ADDRWIN_ENABLE, mem_map_index[window].memenable); 240 sc->memalloc &= ~(1 << window); 241 } 242 243 /* 244 * Find the map that we're using to hold the resoruce. This works well 245 * so long as the client drivers don't do silly things like map the same 246 * area mutliple times, or map both common and attribute memory at the 247 * same time. This latter restriction is a bug. We likely should just 248 * store a pointer to the res in the mem[x] data structure. 249 */ 250 static int 251 exca_mem_findmap(struct exca_softc *sc, struct resource *res) 252 { 253 int win; 254 255 for (win = 0; win < EXCA_MEM_WINS; win++) { 256 if (sc->mem[win].memt == rman_get_bustag(res) && 257 sc->mem[win].addr == rman_get_start(res) && 258 sc->mem[win].size == rman_get_size(res)) 259 return (win); 260 } 261 return (-1); 262 } 263 264 /* 265 * Set the memory flag. This means that we are setting if the memory 266 * is coming from attribute memory or from common memory on the card. 267 * CIS entries are generally in attribute memory (although they can 268 * reside in common memory). Generally, this is the only use for attribute 269 * memory. However, some cards require their drivers to dance in both 270 * common and/or attribute memory and this interface (and setting the 271 * offset interface) exist for such cards. 272 */ 273 int 274 exca_mem_set_flags(struct exca_softc *sc, struct resource *res, uint32_t flags) 275 { 276 int win; 277 278 win = exca_mem_findmap(sc, res); 279 if (win < 0) { 280 device_printf(sc->dev, 281 "set_res_flags: specified resource not active\n"); 282 return (ENOENT); 283 } 284 285 sc->mem[win].kind = flags; 286 exca_do_mem_map(sc, win); 287 return (0); 288 } 289 290 /* 291 * Given a resource, go ahead and unmap it if we can find it in the 292 * resrouce list that's used. 293 */ 294 int 295 exca_mem_unmap_res(struct exca_softc *sc, struct resource *res) 296 { 297 int win; 298 299 win = exca_mem_findmap(sc, res); 300 if (win < 0) 301 return (ENOENT); 302 exca_mem_unmap(sc, win); 303 return (0); 304 } 305 306 /* 307 * Set the offset of the memory. We use this for reading the CIS and 308 * frobbing the pccard's pccard registers (POR, etc). Some drivers 309 * need to access this functionality as well, since they have receive 310 * buffers defined in the attribute memory. Thankfully, these cards 311 * are few and fare between. Some cards also have common memory that 312 * is large and only map a small portion of it at a time (but these cards 313 * are rare, the more common case being to have just a small amount 314 * of common memory that the driver needs to bcopy data from in order to 315 * get at it. 316 */ 317 int 318 exca_mem_set_offset(struct exca_softc *sc, struct resource *res, 319 uint32_t cardaddr, uint32_t *deltap) 320 { 321 int win; 322 uint32_t delta; 323 324 win = exca_mem_findmap(sc, res); 325 if (win < 0) { 326 device_printf(sc->dev, 327 "set_memory_offset: specified resource not active\n"); 328 return (ENOENT); 329 } 330 sc->mem[win].cardaddr = cardaddr; 331 delta = cardaddr % EXCA_MEM_PAGESIZE; 332 if (deltap) 333 *deltap = delta; 334 cardaddr -= delta; 335 sc->mem[win].realsize = sc->mem[win].size + delta + 336 EXCA_MEM_PAGESIZE - 1; 337 sc->mem[win].realsize = sc->mem[win].realsize - 338 (sc->mem[win].realsize % EXCA_MEM_PAGESIZE); 339 sc->mem[win].offset = cardaddr - sc->mem[win].addr; 340 exca_do_mem_map(sc, win); 341 return (0); 342 } 343 344 345 /* I/O */ 346 347 #define EXCA_IOINFO(NUM) { \ 348 EXCA_IOADDR ## NUM ## _START_LSB, \ 349 EXCA_IOADDR ## NUM ## _START_MSB, \ 350 EXCA_IOADDR ## NUM ## _STOP_LSB, \ 351 EXCA_IOADDR ## NUM ## _STOP_MSB, \ 352 EXCA_ADDRWIN_ENABLE_IO ## NUM, \ 353 EXCA_IOCTL_IO ## NUM ## _WAITSTATE \ 354 | EXCA_IOCTL_IO ## NUM ## _ZEROWAIT \ 355 | EXCA_IOCTL_IO ## NUM ## _IOCS16SRC_MASK \ 356 | EXCA_IOCTL_IO ## NUM ## _DATASIZE_MASK, \ 357 { \ 358 EXCA_IOCTL_IO ## NUM ## _IOCS16SRC_CARD, \ 359 EXCA_IOCTL_IO ## NUM ## _IOCS16SRC_DATASIZE \ 360 | EXCA_IOCTL_IO ## NUM ## _DATASIZE_8BIT, \ 361 EXCA_IOCTL_IO ## NUM ## _IOCS16SRC_DATASIZE \ 362 | EXCA_IOCTL_IO ## NUM ## _DATASIZE_16BIT, \ 363 } \ 364 } 365 366 static struct io_map_index_st { 367 int start_lsb; 368 int start_msb; 369 int stop_lsb; 370 int stop_msb; 371 int ioenable; 372 int ioctlmask; 373 int ioctlbits[3]; /* indexed by PCCARD_WIDTH_* */ 374 } io_map_index[] = { 375 EXCA_IOINFO(0), 376 EXCA_IOINFO(1), 377 }; 378 #undef EXCA_IOINFO 379 380 static void 381 exca_do_io_map(struct exca_softc *sc, int win) 382 { 383 struct io_map_index_st *map; 384 385 struct pccard_io_handle *io; 386 387 map = &io_map_index[win]; 388 io = &sc->io[win]; 389 exca_write(sc, map->start_lsb, io->addr & 0xff); 390 exca_write(sc, map->start_msb, (io->addr >> 8) & 0xff); 391 392 exca_write(sc, map->stop_lsb, (io->addr + io->size - 1) & 0xff); 393 exca_write(sc, map->stop_msb, ((io->addr + io->size - 1) >> 8) & 0xff); 394 395 exca_clrb(sc, EXCA_IOCTL, map->ioctlmask); 396 exca_setb(sc, EXCA_IOCTL, map->ioctlbits[io->width]); 397 398 exca_setb(sc, EXCA_ADDRWIN_ENABLE, map->ioenable); 399 #ifdef EXCA_DEBUG 400 { 401 int r1, r2, r3, r4; 402 r1 = exca_read(sc, map->start_msb); 403 r2 = exca_read(sc, map->start_lsb); 404 r3 = exca_read(sc, map->stop_msb); 405 r4 = exca_read(sc, map->stop_lsb); 406 DPRINTF("exca_do_io_map window %d: %02x%02x %02x%02x " 407 "(%08x+%08x)\n", win, r1, r2, r3, r4, 408 io->addr, io->size); 409 } 410 #endif 411 } 412 413 int 414 exca_io_map(struct exca_softc *sc, int width, struct resource *r) 415 { 416 int win; 417 #ifdef EXCA_DEBUG 418 static char *width_names[] = { "auto", "io8", "io16"}; 419 #endif 420 for (win=0; win < EXCA_IO_WINS; win++) { 421 if ((sc->ioalloc & (1 << win)) == 0) { 422 sc->ioalloc |= (1 << win); 423 break; 424 } 425 } 426 if (win >= EXCA_IO_WINS) 427 return (1); 428 429 sc->io[win].iot = rman_get_bustag(r); 430 sc->io[win].ioh = rman_get_bushandle(r); 431 sc->io[win].addr = rman_get_start(r); 432 sc->io[win].size = rman_get_end(r) - sc->io[win].addr + 1; 433 sc->io[win].flags = 0; 434 sc->io[win].width = width; 435 DPRINTF("exca_io_map window %d %s port %x+%x\n", 436 win, width_names[width], sc->io[win].addr, 437 sc->io[win].size); 438 exca_do_io_map(sc, win); 439 440 return (0); 441 } 442 443 static void 444 exca_io_unmap(struct exca_softc *sc, int window) 445 { 446 if (window >= EXCA_IO_WINS) 447 panic("exca_io_unmap: window out of range"); 448 449 exca_clrb(sc, EXCA_ADDRWIN_ENABLE, io_map_index[window].ioenable); 450 451 sc->ioalloc &= ~(1 << window); 452 453 sc->io[window].iot = 0; 454 sc->io[window].ioh = 0; 455 sc->io[window].addr = 0; 456 sc->io[window].size = 0; 457 sc->io[window].flags = 0; 458 sc->io[window].width = 0; 459 } 460 461 static int 462 exca_io_findmap(struct exca_softc *sc, struct resource *res) 463 { 464 int win; 465 466 for (win = 0; win < EXCA_IO_WINS; win++) { 467 if (sc->io[win].iot == rman_get_bustag(res) && 468 sc->io[win].addr == rman_get_start(res) && 469 sc->io[win].size == rman_get_size(res)) 470 return (win); 471 } 472 return (-1); 473 } 474 475 476 int 477 exca_io_unmap_res(struct exca_softc *sc, struct resource *res) 478 { 479 int win; 480 481 win = exca_io_findmap(sc, res); 482 if (win < 0) 483 return (ENOENT); 484 exca_io_unmap(sc, win); 485 return (0); 486 } 487 488 /* Misc */ 489 490 /* 491 * If interrupts are enabled, then we should be able to just wait for 492 * an interrupt routine to wake us up. Busy waiting shouldn't be 493 * necessary. Sadly, not all legacy ISA cards support an interrupt 494 * for the busy state transitions, at least according to their datasheets, 495 * so we busy wait a while here.. 496 */ 497 static void 498 exca_wait_ready(struct exca_softc *sc) 499 { 500 int i; 501 DEVPRINTF(sc->dev, "exca_wait_ready: status 0x%02x\n", 502 exca_read(sc, EXCA_IF_STATUS)); 503 for (i = 0; i < 10000; i++) { 504 if (exca_read(sc, EXCA_IF_STATUS) & EXCA_IF_STATUS_READY) 505 return; 506 DELAY(500); 507 } 508 device_printf(sc->dev, "ready never happened, status = %02x\n", 509 exca_read(sc, EXCA_IF_STATUS)); 510 } 511 512 /* 513 * Reset the card. Ideally, we'd do a lot of this via interrupts. 514 * However, many PC Cards will deassert the ready signal. This means 515 * that they are asserting an interrupt. This makes it hard to 516 * do anything but a busy wait here. One could argue that these 517 * such cards are broken, or that the bridge that allows this sort 518 * of interrupt through isn't quite what you'd want (and may be a standards 519 * violation). However, such arguing would leave a huge class of pc cards 520 * and bridges out of reach for use in the system. 521 * 522 * Maybe I should reevaluate the above based on the power bug I fixed 523 * in OLDCARD. 524 */ 525 void 526 exca_reset(struct exca_softc *sc, device_t child) 527 { 528 int cardtype; 529 int win; 530 531 /* enable socket i/o */ 532 exca_setb(sc, EXCA_PWRCTL, EXCA_PWRCTL_OE); 533 534 exca_write(sc, EXCA_INTR, EXCA_INTR_ENABLE); 535 /* hold reset for 30ms */ 536 DELAY(30*1000); 537 /* clear the reset flag */ 538 exca_setb(sc, EXCA_INTR, EXCA_INTR_RESET); 539 /* wait 20ms as per pc card standard (r2.01) section 4.3.6 */ 540 DELAY(20*1000); 541 542 exca_wait_ready(sc); 543 544 /* disable all address windows */ 545 exca_write(sc, EXCA_ADDRWIN_ENABLE, 0); 546 547 CARD_GET_TYPE(child, &cardtype); 548 exca_setb(sc, EXCA_INTR, (cardtype == PCCARD_IFTYPE_IO) ? 549 EXCA_INTR_CARDTYPE_IO : EXCA_INTR_CARDTYPE_MEM); 550 DEVPRINTF(sc->dev, "card type is %s\n", 551 (cardtype == PCCARD_IFTYPE_IO) ? "io" : "mem"); 552 553 /* reinstall all the memory and io mappings */ 554 for (win = 0; win < EXCA_MEM_WINS; ++win) 555 if (sc->memalloc & (1 << win)) 556 exca_do_mem_map(sc, win); 557 for (win = 0; win < EXCA_IO_WINS; ++win) 558 if (sc->ioalloc & (1 << win)) 559 exca_do_io_map(sc, win); 560 } 561 562 /* 563 * Initialize the exca_softc data structure for the first time. 564 */ 565 void 566 exca_init(struct exca_softc *sc, device_t dev, 567 bus_space_tag_t bst, bus_space_handle_t bsh, uint32_t offset) 568 { 569 sc->dev = dev; 570 sc->memalloc = 0; 571 sc->ioalloc = 0; 572 sc->bst = bst; 573 sc->bsh = bsh; 574 sc->offset = offset; 575 sc->flags = 0; 576 } 577 578 /* 579 * Probe the expected slots. We maybe should set the ID for each of these 580 * slots too while we're at it. But maybe that belongs to a separate 581 * function. 582 * 583 * Callers must charantee that there are at least EXCA_NSLOTS (4) in 584 * the array that they pass the address of the first element in the 585 * "exca" parameter. 586 */ 587 int 588 exca_probe_slots(device_t dev, struct exca_softc *exca) 589 { 590 int rid; 591 struct resource *res; 592 int err; 593 bus_space_tag_t iot; 594 bus_space_handle_t ioh; 595 int i; 596 597 err = ENXIO; 598 rid = 0; 599 res = bus_alloc_resource(dev, SYS_RES_IOPORT, &rid, 0, ~0, EXCA_IOSIZE, 600 RF_ACTIVE); 601 if (res == NULL) 602 return (ENXIO); 603 iot = rman_get_bustag(res); 604 ioh = rman_get_bushandle(res); 605 for (i = 0; i < EXCA_NSLOTS; i++) { 606 exca_init(&exca[i], dev, iot, ioh, i * EXCA_SOCKET_SIZE); 607 if (exca_is_pcic(&exca[i])) { 608 err = 0; 609 exca[i].flags |= EXCA_SOCKET_PRESENT; 610 } 611 } 612 bus_release_resource(dev, SYS_RES_IOPORT, rid, res); 613 return (err); 614 } 615 616 int 617 exca_is_pcic(struct exca_softc *sc) 618 { 619 /* XXX */ 620 return (0); 621 } 622 623 static int exca_modevent(module_t mod, int cmd, void *arg) 624 { 625 return 0; 626 } 627 DEV_MODULE(exca, exca_modevent, NULL); 628 MODULE_VERSION(exca, 1); 629