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 1.3 2006/12/22 23:26:22 swildner 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 #include <sys/bus.h> 67 #include <sys/rman.h> 68 69 #include <bus/pccard/pccardreg.h> 70 #include <bus/pccard/pccardvar.h> 71 72 #include <dev/pccard/exca/excareg.h> 73 #include <dev/pccard/exca/excavar.h> 74 75 #ifdef EXCA_DEBUG 76 #define DEVPRINTF(dev, fmt, args...) device_printf((dev), (fmt), ## args) 77 #define DPRINTF(fmt, args...) kprintf(fmt, ## args) 78 #else 79 #define DEVPRINTF(dev, fmt, args...) 80 #define DPRINTF(fmt, args...) 81 #endif 82 83 /* memory */ 84 85 #define EXCA_MEMINFO(NUM) { \ 86 EXCA_SYSMEM_ADDR ## NUM ## _START_LSB, \ 87 EXCA_SYSMEM_ADDR ## NUM ## _START_MSB, \ 88 EXCA_SYSMEM_ADDR ## NUM ## _STOP_LSB, \ 89 EXCA_SYSMEM_ADDR ## NUM ## _STOP_MSB, \ 90 EXCA_SYSMEM_ADDR ## NUM ## _WIN, \ 91 EXCA_CARDMEM_ADDR ## NUM ## _LSB, \ 92 EXCA_CARDMEM_ADDR ## NUM ## _MSB, \ 93 EXCA_ADDRWIN_ENABLE_MEM ## NUM, \ 94 } 95 96 static struct mem_map_index_st { 97 int sysmem_start_lsb; 98 int sysmem_start_msb; 99 int sysmem_stop_lsb; 100 int sysmem_stop_msb; 101 int sysmem_win; 102 int cardmem_lsb; 103 int cardmem_msb; 104 int memenable; 105 } mem_map_index[] = { 106 EXCA_MEMINFO(0), 107 EXCA_MEMINFO(1), 108 EXCA_MEMINFO(2), 109 EXCA_MEMINFO(3), 110 EXCA_MEMINFO(4) 111 }; 112 #undef EXCA_MEMINFO 113 114 /* 115 * Helper function. This will map the requested memory slot. We setup the 116 * map before we call this function. This is used to initially force the 117 * mapping, as well as later restore the mapping after it has been destroyed 118 * in some fashion (due to a power event typically). 119 */ 120 static void 121 exca_do_mem_map(struct exca_softc *sc, int win) 122 { 123 struct mem_map_index_st *map; 124 struct pccard_mem_handle *mem; 125 126 map = &mem_map_index[win]; 127 mem = &sc->mem[win]; 128 exca_write(sc, map->sysmem_start_lsb, 129 (mem->addr >> EXCA_SYSMEM_ADDRX_SHIFT) & 0xff); 130 exca_write(sc, map->sysmem_start_msb, 131 ((mem->addr >> (EXCA_SYSMEM_ADDRX_SHIFT + 8)) & 132 EXCA_SYSMEM_ADDRX_START_MSB_ADDR_MASK) | 0x80); 133 134 exca_write(sc, map->sysmem_stop_lsb, 135 ((mem->addr + mem->realsize - 1) >> 136 EXCA_SYSMEM_ADDRX_SHIFT) & 0xff); 137 exca_write(sc, map->sysmem_stop_msb, 138 (((mem->addr + mem->realsize - 1) >> 139 (EXCA_SYSMEM_ADDRX_SHIFT + 8)) & 140 EXCA_SYSMEM_ADDRX_STOP_MSB_ADDR_MASK) | 141 EXCA_SYSMEM_ADDRX_STOP_MSB_WAIT2); 142 143 exca_write(sc, map->sysmem_win, 144 (mem->addr >> EXCA_MEMREG_WIN_SHIFT) & 0xff); 145 146 exca_write(sc, map->cardmem_lsb, 147 (mem->offset >> EXCA_CARDMEM_ADDRX_SHIFT) & 0xff); 148 exca_write(sc, map->cardmem_msb, 149 ((mem->offset >> (EXCA_CARDMEM_ADDRX_SHIFT + 8)) & 150 EXCA_CARDMEM_ADDRX_MSB_ADDR_MASK) | 151 ((mem->kind == PCCARD_MEM_ATTR) ? 152 EXCA_CARDMEM_ADDRX_MSB_REGACTIVE_ATTR : 0)); 153 154 exca_setb(sc, EXCA_ADDRWIN_ENABLE, EXCA_ADDRWIN_ENABLE_MEMCS16 | 155 map->memenable); 156 157 DELAY(100); 158 #ifdef EXCA_DEBUG 159 { 160 int r1, r2, r3, r4, r5, r6, r7; 161 r1 = exca_read(sc, map->sysmem_start_msb); 162 r2 = exca_read(sc, map->sysmem_start_lsb); 163 r3 = exca_read(sc, map->sysmem_stop_msb); 164 r4 = exca_read(sc, map->sysmem_stop_lsb); 165 r5 = exca_read(sc, map->cardmem_msb); 166 r6 = exca_read(sc, map->cardmem_lsb); 167 r7 = exca_read(sc, map->sysmem_win); 168 kprintf("exca_do_mem_map window %d: %02x%02x %02x%02x " 169 "%02x%02x %02x (%08x+%08x.%08x*%08lx)\n", 170 win, r1, r2, r3, r4, r5, r6, r7, 171 mem->addr, mem->size, mem->realsize, 172 mem->offset); 173 } 174 #endif 175 } 176 177 /* 178 * public interface to map a resource. kind is the type of memory to 179 * map (either common or attribute). Memory created via this interface 180 * starts out at card address 0. Since the only way to set this is 181 * to set it on a struct resource after it has been mapped, we're safe 182 * in maping this assumption. Note that resources can be remapped using 183 * exca_do_mem_map so that's how the card address can be set later. 184 */ 185 int 186 exca_mem_map(struct exca_softc *sc, int kind, struct resource *res) 187 { 188 int win; 189 190 for (win = 0; win < EXCA_MEM_WINS; win++) { 191 if ((sc->memalloc & (1 << win)) == 0) { 192 sc->memalloc |= (1 << win); 193 break; 194 } 195 } 196 if (win >= EXCA_MEM_WINS) 197 return (1); 198 if (((rman_get_start(res) >> EXCA_CARDMEM_ADDRX_SHIFT) & 0xff) != 0 && 199 (sc->flags & EXCA_HAS_MEMREG_WIN) == 0) { 200 device_printf(sc->dev, "Does not support mapping above 24M."); 201 return (1); 202 } 203 204 sc->mem[win].cardaddr = 0; 205 sc->mem[win].memt = rman_get_bustag(res); 206 sc->mem[win].memh = rman_get_bushandle(res); 207 sc->mem[win].addr = rman_get_start(res); 208 sc->mem[win].size = rman_get_end(res) - sc->mem[win].addr + 1; 209 sc->mem[win].realsize = sc->mem[win].size + EXCA_MEM_PAGESIZE - 1; 210 sc->mem[win].realsize = sc->mem[win].realsize - 211 (sc->mem[win].realsize % EXCA_MEM_PAGESIZE); 212 sc->mem[win].offset = (long)(sc->mem[win].addr); 213 sc->mem[win].kind = kind; 214 DPRINTF("exca_mem_map window %d bus %x+%x+%lx card addr %x\n", 215 win, sc->mem[win].addr, sc->mem[win].size, 216 sc->mem[win].offset, sc->mem[win].cardaddr); 217 exca_do_mem_map(sc, win); 218 219 return (0); 220 } 221 222 /* 223 * Private helper function. This turns off a given memory map that is in 224 * use. We do this by just clearing the enable bit in the pcic. If we needed 225 * to make memory unmapping/mapping pairs faster, we would have to store 226 * more state information about the pcic and then use that to intelligently 227 * to the map/unmap. However, since we don't do that sort of thing often 228 * (generally just at configure time), it isn't a case worth optimizing. 229 */ 230 static void 231 exca_mem_unmap(struct exca_softc *sc, int window) 232 { 233 if (window < 0 || window >= EXCA_MEM_WINS) 234 panic("exca_mem_unmap: window out of range"); 235 236 exca_clrb(sc, EXCA_ADDRWIN_ENABLE, mem_map_index[window].memenable); 237 sc->memalloc &= ~(1 << window); 238 } 239 240 /* 241 * Find the map that we're using to hold the resoruce. This works well 242 * so long as the client drivers don't do silly things like map the same 243 * area mutliple times, or map both common and attribute memory at the 244 * same time. This latter restriction is a bug. We likely should just 245 * store a pointer to the res in the mem[x] data structure. 246 */ 247 static int 248 exca_mem_findmap(struct exca_softc *sc, struct resource *res) 249 { 250 int win; 251 252 for (win = 0; win < EXCA_MEM_WINS; win++) { 253 if (sc->mem[win].memt == rman_get_bustag(res) && 254 sc->mem[win].addr == rman_get_start(res) && 255 sc->mem[win].size == rman_get_size(res)) 256 return (win); 257 } 258 return (-1); 259 } 260 261 /* 262 * Set the memory flag. This means that we are setting if the memory 263 * is coming from attribute memory or from common memory on the card. 264 * CIS entries are generally in attribute memory (although they can 265 * reside in common memory). Generally, this is the only use for attribute 266 * memory. However, some cards require their drivers to dance in both 267 * common and/or attribute memory and this interface (and setting the 268 * offset interface) exist for such cards. 269 */ 270 int 271 exca_mem_set_flags(struct exca_softc *sc, struct resource *res, uint32_t flags) 272 { 273 int win; 274 275 win = exca_mem_findmap(sc, res); 276 if (win < 0) { 277 device_printf(sc->dev, 278 "set_res_flags: specified resource not active\n"); 279 return (ENOENT); 280 } 281 282 sc->mem[win].kind = flags; 283 exca_do_mem_map(sc, win); 284 return (0); 285 } 286 287 /* 288 * Given a resource, go ahead and unmap it if we can find it in the 289 * resrouce list that's used. 290 */ 291 int 292 exca_mem_unmap_res(struct exca_softc *sc, struct resource *res) 293 { 294 int win; 295 296 win = exca_mem_findmap(sc, res); 297 if (win < 0) 298 return (ENOENT); 299 exca_mem_unmap(sc, win); 300 return (0); 301 } 302 303 /* 304 * Set the offset of the memory. We use this for reading the CIS and 305 * frobbing the pccard's pccard registers (POR, etc). Some drivers 306 * need to access this functionality as well, since they have receive 307 * buffers defined in the attribute memory. Thankfully, these cards 308 * are few and fare between. Some cards also have common memory that 309 * is large and only map a small portion of it at a time (but these cards 310 * are rare, the more common case being to have just a small amount 311 * of common memory that the driver needs to bcopy data from in order to 312 * get at it. 313 */ 314 int 315 exca_mem_set_offset(struct exca_softc *sc, struct resource *res, 316 uint32_t cardaddr, uint32_t *deltap) 317 { 318 int win; 319 uint32_t delta; 320 321 win = exca_mem_findmap(sc, res); 322 if (win < 0) { 323 device_printf(sc->dev, 324 "set_memory_offset: specified resource not active\n"); 325 return (ENOENT); 326 } 327 sc->mem[win].cardaddr = cardaddr; 328 delta = cardaddr % EXCA_MEM_PAGESIZE; 329 if (deltap) 330 *deltap = delta; 331 cardaddr -= delta; 332 sc->mem[win].realsize = sc->mem[win].size + delta + 333 EXCA_MEM_PAGESIZE - 1; 334 sc->mem[win].realsize = sc->mem[win].realsize - 335 (sc->mem[win].realsize % EXCA_MEM_PAGESIZE); 336 sc->mem[win].offset = cardaddr - sc->mem[win].addr; 337 exca_do_mem_map(sc, win); 338 return (0); 339 } 340 341 342 /* I/O */ 343 344 #define EXCA_IOINFO(NUM) { \ 345 EXCA_IOADDR ## NUM ## _START_LSB, \ 346 EXCA_IOADDR ## NUM ## _START_MSB, \ 347 EXCA_IOADDR ## NUM ## _STOP_LSB, \ 348 EXCA_IOADDR ## NUM ## _STOP_MSB, \ 349 EXCA_ADDRWIN_ENABLE_IO ## NUM, \ 350 EXCA_IOCTL_IO ## NUM ## _WAITSTATE \ 351 | EXCA_IOCTL_IO ## NUM ## _ZEROWAIT \ 352 | EXCA_IOCTL_IO ## NUM ## _IOCS16SRC_MASK \ 353 | EXCA_IOCTL_IO ## NUM ## _DATASIZE_MASK, \ 354 { \ 355 EXCA_IOCTL_IO ## NUM ## _IOCS16SRC_CARD, \ 356 EXCA_IOCTL_IO ## NUM ## _IOCS16SRC_DATASIZE \ 357 | EXCA_IOCTL_IO ## NUM ## _DATASIZE_8BIT, \ 358 EXCA_IOCTL_IO ## NUM ## _IOCS16SRC_DATASIZE \ 359 | EXCA_IOCTL_IO ## NUM ## _DATASIZE_16BIT, \ 360 } \ 361 } 362 363 static struct io_map_index_st { 364 int start_lsb; 365 int start_msb; 366 int stop_lsb; 367 int stop_msb; 368 int ioenable; 369 int ioctlmask; 370 int ioctlbits[3]; /* indexed by PCCARD_WIDTH_* */ 371 } io_map_index[] = { 372 EXCA_IOINFO(0), 373 EXCA_IOINFO(1), 374 }; 375 #undef EXCA_IOINFO 376 377 static void 378 exca_do_io_map(struct exca_softc *sc, int win) 379 { 380 struct io_map_index_st *map; 381 382 struct pccard_io_handle *io; 383 384 map = &io_map_index[win]; 385 io = &sc->io[win]; 386 exca_write(sc, map->start_lsb, io->addr & 0xff); 387 exca_write(sc, map->start_msb, (io->addr >> 8) & 0xff); 388 389 exca_write(sc, map->stop_lsb, (io->addr + io->size - 1) & 0xff); 390 exca_write(sc, map->stop_msb, ((io->addr + io->size - 1) >> 8) & 0xff); 391 392 exca_clrb(sc, EXCA_IOCTL, map->ioctlmask); 393 exca_setb(sc, EXCA_IOCTL, map->ioctlbits[io->width]); 394 395 exca_setb(sc, EXCA_ADDRWIN_ENABLE, map->ioenable); 396 #ifdef EXCA_DEBUG 397 { 398 int r1, r2, r3, r4; 399 r1 = exca_read(sc, map->start_msb); 400 r2 = exca_read(sc, map->start_lsb); 401 r3 = exca_read(sc, map->stop_msb); 402 r4 = exca_read(sc, map->stop_lsb); 403 DPRINTF("exca_do_io_map window %d: %02x%02x %02x%02x " 404 "(%08x+%08x)\n", win, r1, r2, r3, r4, 405 io->addr, io->size); 406 } 407 #endif 408 } 409 410 int 411 exca_io_map(struct exca_softc *sc, int width, struct resource *r) 412 { 413 int win; 414 #ifdef EXCA_DEBUG 415 static char *width_names[] = { "auto", "io8", "io16"}; 416 #endif 417 for (win=0; win < EXCA_IO_WINS; win++) { 418 if ((sc->ioalloc & (1 << win)) == 0) { 419 sc->ioalloc |= (1 << win); 420 break; 421 } 422 } 423 if (win >= EXCA_IO_WINS) 424 return (1); 425 426 sc->io[win].iot = rman_get_bustag(r); 427 sc->io[win].ioh = rman_get_bushandle(r); 428 sc->io[win].addr = rman_get_start(r); 429 sc->io[win].size = rman_get_end(r) - sc->io[win].addr + 1; 430 sc->io[win].flags = 0; 431 sc->io[win].width = width; 432 DPRINTF("exca_io_map window %d %s port %x+%x\n", 433 win, width_names[width], sc->io[win].addr, 434 sc->io[win].size); 435 exca_do_io_map(sc, win); 436 437 return (0); 438 } 439 440 static void 441 exca_io_unmap(struct exca_softc *sc, int window) 442 { 443 if (window >= EXCA_IO_WINS) 444 panic("exca_io_unmap: window out of range"); 445 446 exca_clrb(sc, EXCA_ADDRWIN_ENABLE, io_map_index[window].ioenable); 447 448 sc->ioalloc &= ~(1 << window); 449 450 sc->io[window].iot = 0; 451 sc->io[window].ioh = 0; 452 sc->io[window].addr = 0; 453 sc->io[window].size = 0; 454 sc->io[window].flags = 0; 455 sc->io[window].width = 0; 456 } 457 458 static int 459 exca_io_findmap(struct exca_softc *sc, struct resource *res) 460 { 461 int win; 462 463 for (win = 0; win < EXCA_IO_WINS; win++) { 464 if (sc->io[win].iot == rman_get_bustag(res) && 465 sc->io[win].addr == rman_get_start(res) && 466 sc->io[win].size == rman_get_size(res)) 467 return (win); 468 } 469 return (-1); 470 } 471 472 473 int 474 exca_io_unmap_res(struct exca_softc *sc, struct resource *res) 475 { 476 int win; 477 478 win = exca_io_findmap(sc, res); 479 if (win < 0) 480 return (ENOENT); 481 exca_io_unmap(sc, win); 482 return (0); 483 } 484 485 /* Misc */ 486 487 /* 488 * If interrupts are enabled, then we should be able to just wait for 489 * an interrupt routine to wake us up. Busy waiting shouldn't be 490 * necessary. Sadly, not all legacy ISA cards support an interrupt 491 * for the busy state transitions, at least according to their datasheets, 492 * so we busy wait a while here.. 493 */ 494 static void 495 exca_wait_ready(struct exca_softc *sc) 496 { 497 int i; 498 DEVPRINTF(sc->dev, "exca_wait_ready: status 0x%02x\n", 499 exca_read(sc, EXCA_IF_STATUS)); 500 for (i = 0; i < 10000; i++) { 501 if (exca_read(sc, EXCA_IF_STATUS) & EXCA_IF_STATUS_READY) 502 return; 503 DELAY(500); 504 } 505 device_printf(sc->dev, "ready never happened, status = %02x\n", 506 exca_read(sc, EXCA_IF_STATUS)); 507 } 508 509 /* 510 * Reset the card. Ideally, we'd do a lot of this via interrupts. 511 * However, many PC Cards will deassert the ready signal. This means 512 * that they are asserting an interrupt. This makes it hard to 513 * do anything but a busy wait here. One could argue that these 514 * such cards are broken, or that the bridge that allows this sort 515 * of interrupt through isn't quite what you'd want (and may be a standards 516 * violation). However, such arguing would leave a huge class of pc cards 517 * and bridges out of reach for use in the system. 518 * 519 * Maybe I should reevaluate the above based on the power bug I fixed 520 * in OLDCARD. 521 */ 522 void 523 exca_reset(struct exca_softc *sc, device_t child) 524 { 525 int cardtype; 526 int win; 527 528 /* enable socket i/o */ 529 exca_setb(sc, EXCA_PWRCTL, EXCA_PWRCTL_OE); 530 531 exca_write(sc, EXCA_INTR, EXCA_INTR_ENABLE); 532 /* hold reset for 30ms */ 533 DELAY(30*1000); 534 /* clear the reset flag */ 535 exca_setb(sc, EXCA_INTR, EXCA_INTR_RESET); 536 /* wait 20ms as per pc card standard (r2.01) section 4.3.6 */ 537 DELAY(20*1000); 538 539 exca_wait_ready(sc); 540 541 /* disable all address windows */ 542 exca_write(sc, EXCA_ADDRWIN_ENABLE, 0); 543 544 CARD_GET_TYPE(child, &cardtype); 545 exca_setb(sc, EXCA_INTR, (cardtype == PCCARD_IFTYPE_IO) ? 546 EXCA_INTR_CARDTYPE_IO : EXCA_INTR_CARDTYPE_MEM); 547 DEVPRINTF(sc->dev, "card type is %s\n", 548 (cardtype == PCCARD_IFTYPE_IO) ? "io" : "mem"); 549 550 /* reinstall all the memory and io mappings */ 551 for (win = 0; win < EXCA_MEM_WINS; ++win) 552 if (sc->memalloc & (1 << win)) 553 exca_do_mem_map(sc, win); 554 for (win = 0; win < EXCA_IO_WINS; ++win) 555 if (sc->ioalloc & (1 << win)) 556 exca_do_io_map(sc, win); 557 } 558 559 /* 560 * Initialize the exca_softc data structure for the first time. 561 */ 562 void 563 exca_init(struct exca_softc *sc, device_t dev, 564 bus_space_tag_t bst, bus_space_handle_t bsh, uint32_t offset) 565 { 566 sc->dev = dev; 567 sc->memalloc = 0; 568 sc->ioalloc = 0; 569 sc->bst = bst; 570 sc->bsh = bsh; 571 sc->offset = offset; 572 sc->flags = 0; 573 } 574 575 /* 576 * Probe the expected slots. We maybe should set the ID for each of these 577 * slots too while we're at it. But maybe that belongs to a separate 578 * function. 579 * 580 * Callers must charantee that there are at least EXCA_NSLOTS (4) in 581 * the array that they pass the address of the first element in the 582 * "exca" parameter. 583 */ 584 int 585 exca_probe_slots(device_t dev, struct exca_softc *exca) 586 { 587 int rid; 588 struct resource *res; 589 int err; 590 bus_space_tag_t iot; 591 bus_space_handle_t ioh; 592 int i; 593 594 err = ENXIO; 595 rid = 0; 596 res = bus_alloc_resource(dev, SYS_RES_IOPORT, &rid, 0, ~0, EXCA_IOSIZE, 597 RF_ACTIVE); 598 if (res == NULL) 599 return (ENXIO); 600 iot = rman_get_bustag(res); 601 ioh = rman_get_bushandle(res); 602 for (i = 0; i < EXCA_NSLOTS; i++) { 603 exca_init(&exca[i], dev, iot, ioh, i * EXCA_SOCKET_SIZE); 604 if (exca_is_pcic(&exca[i])) { 605 err = 0; 606 exca[i].flags |= EXCA_SOCKET_PRESENT; 607 } 608 } 609 bus_release_resource(dev, SYS_RES_IOPORT, rid, res); 610 return (err); 611 } 612 613 int 614 exca_is_pcic(struct exca_softc *sc) 615 { 616 /* XXX */ 617 return (0); 618 } 619 620 static int exca_modevent(module_t mod, int cmd, void *arg) 621 { 622 return 0; 623 } 624 DEV_MODULE(exca, exca_modevent, NULL); 625 MODULE_VERSION(exca, 1); 626