cardbus_map.c revision 1.28
1 /* $NetBSD: cardbus_map.c,v 1.28 2009/03/14 15:36:16 dsl Exp $ */ 2 3 /* 4 * Copyright (c) 1999 and 2000 5 * HAYAKAWA Koichi. 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 * 3. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed by HAYAKAWA Koichi. 18 * 4. The name of the author may not be used to endorse or promote products 19 * derived from this software without specific prior written permission. 20 * 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 23 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 24 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 25 * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, 26 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 27 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 28 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 30 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN 31 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 32 * POSSIBILITY OF SUCH DAMAGE. 33 */ 34 35 #include <sys/cdefs.h> 36 __KERNEL_RCSID(0, "$NetBSD: cardbus_map.c,v 1.28 2009/03/14 15:36:16 dsl Exp $"); 37 38 #include <sys/param.h> 39 #include <sys/systm.h> 40 #include <sys/device.h> 41 42 #include <sys/bus.h> 43 44 #include <dev/cardbus/cardbusvar.h> 45 46 #include <dev/pci/pcireg.h> /* XXX */ 47 48 #if defined DEBUG && !defined CARDBUS_MAP_DEBUG 49 #define CARDBUS_MAP_DEBUG 50 #endif 51 52 #if defined CARDBUS_MAP_DEBUG 53 #define STATIC 54 #define DPRINTF(a) printf a 55 #else 56 #define STATIC static 57 #define DPRINTF(a) 58 #endif 59 60 61 static int cardbus_io_find(cardbus_chipset_tag_t, cardbus_function_tag_t, 62 cardbustag_t, int, cardbusreg_t, 63 bus_addr_t *, bus_size_t *, int *); 64 static int cardbus_mem_find(cardbus_chipset_tag_t, cardbus_function_tag_t, 65 cardbustag_t, int, cardbusreg_t, 66 bus_addr_t *, bus_size_t *, int *); 67 68 /* 69 * static int cardbus_io_find(cardbus_chipset_tag_t cc, 70 * cardbus_function_tag_t cf, cardbustag_t tag, 71 * int reg, cardbusreg_t type, bus_addr_t *basep, 72 * bus_size_t *sizep, int *flagsp) 73 * This code is stolen from sys/dev/pci_map.c. 74 */ 75 static int 76 cardbus_io_find( 77 cardbus_chipset_tag_t cc, 78 cardbus_function_tag_t cf, 79 cardbustag_t tag, 80 int reg, 81 cardbusreg_t type, 82 bus_addr_t *basep, 83 bus_size_t *sizep, 84 int *flagsp) 85 { 86 cardbusreg_t address, mask; 87 int s; 88 89 /* EXT ROM is able to map on memory space ONLY. */ 90 if (reg == CARDBUS_ROM_REG) { 91 return 1; 92 } 93 94 if(reg < PCI_MAPREG_START || reg >= PCI_MAPREG_END || (reg & 3)) { 95 panic("cardbus_io_find: bad request"); 96 } 97 98 /* 99 * Section 6.2.5.1, `Address Maps', tells us that: 100 * 101 * 1) The builtin software should have already mapped the device in a 102 * reasonable way. 103 * 104 * 2) A device which wants 2^n bytes of memory will hardwire the bottom 105 * n bits of the address to 0. As recommended, we write all 1s and see 106 * what we get back. 107 */ 108 s = splhigh(); 109 address = cardbus_conf_read(cc, cf, tag, reg); 110 cardbus_conf_write(cc, cf, tag, reg, 0xffffffff); 111 mask = cardbus_conf_read(cc, cf, tag, reg); 112 cardbus_conf_write(cc, cf, tag, reg, address); 113 splx(s); 114 115 if (PCI_MAPREG_TYPE(address) != PCI_MAPREG_TYPE_IO) { 116 printf("cardbus_io_find: expected type i/o, found mem\n"); 117 return 1; 118 } 119 120 if (PCI_MAPREG_IO_SIZE(mask) == 0) { 121 printf("cardbus_io_find: void region\n"); 122 return 1; 123 } 124 125 if (basep != 0) { 126 *basep = PCI_MAPREG_IO_ADDR(address); 127 } 128 if (sizep != 0) { 129 *sizep = PCI_MAPREG_IO_SIZE(mask); 130 } 131 if (flagsp != 0) { 132 *flagsp = 0; 133 } 134 135 return 0; 136 } 137 138 139 140 /* 141 * static int cardbus_mem_find(cardbus_chipset_tag_t cc, 142 * cardbus_function_tag_t cf, cardbustag_t tag, 143 * int reg, cardbusreg_t type, bus_addr_t *basep, 144 * bus_size_t *sizep, int *flagsp) 145 * This code is stolen from sys/dev/pci_map.c. 146 */ 147 static int 148 cardbus_mem_find(cardbus_chipset_tag_t cc, cardbus_function_tag_t cf, cardbustag_t tag, int reg, cardbusreg_t type, bus_addr_t *basep, bus_size_t *sizep, int *flagsp) 149 { 150 cardbusreg_t address, mask; 151 int s; 152 153 if (reg != CARDBUS_ROM_REG && 154 (reg < PCI_MAPREG_START || reg >= PCI_MAPREG_END || (reg & 3))) { 155 panic("cardbus_mem_find: bad request"); 156 } 157 158 /* 159 * Section 6.2.5.1, `Address Maps', tells us that: 160 * 161 * 1) The builtin software should have already mapped the device in a 162 * reasonable way. 163 * 164 * 2) A device which wants 2^n bytes of memory will hardwire the bottom 165 * n bits of the address to 0. As recommended, we write all 1s and see 166 * what we get back. 167 */ 168 s = splhigh(); 169 address = cardbus_conf_read(cc, cf, tag, reg); 170 cardbus_conf_write(cc, cf, tag, reg, 0xffffffff); 171 mask = cardbus_conf_read(cc, cf, tag, reg); 172 cardbus_conf_write(cc, cf, tag, reg, address); 173 splx(s); 174 175 if (reg != CARDBUS_ROM_REG) { 176 /* memory space BAR */ 177 178 if (PCI_MAPREG_TYPE(address) != PCI_MAPREG_TYPE_MEM) { 179 printf("cardbus_mem_find: expected type mem, found i/o\n"); 180 return 1; 181 } 182 if (PCI_MAPREG_MEM_TYPE(address) != PCI_MAPREG_MEM_TYPE(type)) { 183 printf("cardbus_mem_find: expected mem type %08x, found %08x\n", 184 PCI_MAPREG_MEM_TYPE(type), 185 PCI_MAPREG_MEM_TYPE(address)); 186 return 1; 187 } 188 } 189 190 if (PCI_MAPREG_MEM_SIZE(mask) == 0) { 191 printf("cardbus_mem_find: void region\n"); 192 return 1; 193 } 194 195 switch (PCI_MAPREG_MEM_TYPE(address)) { 196 case PCI_MAPREG_MEM_TYPE_32BIT: 197 case PCI_MAPREG_MEM_TYPE_32BIT_1M: 198 break; 199 case PCI_MAPREG_MEM_TYPE_64BIT: 200 printf("cardbus_mem_find: 64-bit memory mapping register\n"); 201 return 1; 202 default: 203 printf("cardbus_mem_find: reserved mapping register type\n"); 204 return 1; 205 } 206 207 if (basep != 0) { 208 *basep = PCI_MAPREG_MEM_ADDR(address); 209 } 210 if (sizep != 0) { 211 *sizep = PCI_MAPREG_MEM_SIZE(mask); 212 } 213 if (flagsp != 0) { 214 *flagsp = PCI_MAPREG_MEM_PREFETCHABLE(address) ? 215 BUS_SPACE_MAP_PREFETCHABLE : 0; 216 } 217 218 return 0; 219 } 220 221 222 223 224 /* 225 * int cardbus_mapreg_map(struct cardbus_softc *, int, int, cardbusreg_t, 226 * int bus_space_tag_t *, bus_space_handle_t *, 227 * bus_addr_t *, bus_size_t *) 228 * This function maps bus-space on the value of Base Address 229 * Register (BAR) indexed by the argument `reg' (the second argument). 230 * When the value of the BAR is not valid, such as 0x00000000, a new 231 * address should be allocated for the BAR and new address values is 232 * written on the BAR. 233 */ 234 int 235 cardbus_mapreg_map(sc, func, reg, type, busflags, tagp, handlep, basep, sizep) 236 struct cardbus_softc *sc; 237 int func, reg, busflags; 238 cardbusreg_t type; 239 bus_space_tag_t *tagp; 240 bus_space_handle_t *handlep; 241 bus_addr_t *basep; 242 bus_size_t *sizep; 243 { 244 cardbus_chipset_tag_t cc = sc->sc_cc; 245 cardbus_function_tag_t cf = sc->sc_cf; 246 bus_space_tag_t bustag; 247 #if rbus 248 rbus_tag_t rbustag; 249 #endif 250 bus_space_handle_t handle; 251 bus_addr_t base; 252 bus_size_t size; 253 int flags; 254 int status = 0; 255 cardbustag_t tag; 256 257 size = 0; /* XXX gcc */ 258 flags = 0; /* XXX gcc */ 259 260 tag = cardbus_make_tag(cc, cf, sc->sc_bus, func); 261 262 DPRINTF(("cardbus_mapreg_map called: %s %x\n", device_xname(sc->sc_dev), 263 type)); 264 265 if (PCI_MAPREG_TYPE(type) == PCI_MAPREG_TYPE_IO) { 266 if (cardbus_io_find(cc, cf, tag, reg, type, &base, &size, &flags)) { 267 status = 1; 268 } 269 bustag = sc->sc_iot; 270 #if rbus 271 rbustag = sc->sc_rbus_iot; 272 #endif 273 } else { 274 if (cardbus_mem_find(cc, cf, tag, reg, type, &base, &size, &flags)){ 275 status = 1; 276 } 277 bustag = sc->sc_memt; 278 #if rbus 279 rbustag = sc->sc_rbus_memt; 280 #endif 281 } 282 if (status == 0) { 283 #if rbus 284 bus_addr_t mask = size - 1; 285 if (base != 0) { 286 mask = 0xffffffff; 287 } 288 if ((*cf->cardbus_space_alloc)(cc, rbustag, base, size, mask, 289 size, busflags | flags, &base, &handle)) { 290 panic("io alloc"); 291 } 292 #else 293 bus_addr_t start = 0x8300; 294 bus_addr_t end = 0x8400; 295 if (base != 0) { 296 bus_addr_t start = base; 297 bus_addr_t end = base + size; 298 } 299 if (bus_space_alloc(bustag, start, end, size, size, 0, 0, &base, &handle)) { 300 panic("io alloc"); 301 } 302 #endif 303 } 304 cardbus_conf_write(cc, cf, tag, reg, base); 305 306 DPRINTF(("cardbus_mapreg_map: physaddr %lx\n", (unsigned long)base)); 307 308 if (tagp != 0) { 309 *tagp = bustag; 310 } 311 if (handlep != 0) { 312 *handlep = handle; 313 } 314 if (basep != 0) { 315 *basep = base; 316 } 317 if (sizep != 0) { 318 *sizep = size; 319 } 320 cardbus_free_tag(cc, cf, tag); 321 322 return 0; 323 } 324 325 326 327 328 329 /* 330 * int cardbus_mapreg_unmap(struct cardbus_softc *sc, int func, int reg, 331 * bus_space_tag_t tag, bus_space_handle_t handle, 332 * bus_size_t size) 333 * 334 * This function releases bus-space region and close memory or io 335 * window on the bridge. 336 * 337 * Arguments: 338 * struct cardbus_softc *sc; the pointer to the device structure of cardbus. 339 * int func; the number of function on the device. 340 * int reg; the offset of BAR register. 341 */ 342 int 343 cardbus_mapreg_unmap(sc, func, reg, tag, handle, size) 344 struct cardbus_softc *sc; 345 int func, reg; 346 bus_space_tag_t tag; 347 bus_space_handle_t handle; 348 bus_size_t size; 349 { 350 cardbus_chipset_tag_t cc = sc->sc_cc; 351 cardbus_function_tag_t cf = sc->sc_cf; 352 int st = 1; 353 cardbustag_t cardbustag; 354 #if rbus 355 rbus_tag_t rbustag; 356 357 if (sc->sc_iot == tag) { 358 /* bus space is io space */ 359 DPRINTF(("%s: unmap i/o space\n", device_xname(sc->sc_dev))); 360 rbustag = sc->sc_rbus_iot; 361 } else if (sc->sc_memt == tag) { 362 /* bus space is memory space */ 363 DPRINTF(("%s: unmap mem space\n", device_xname(sc->sc_dev))); 364 rbustag = sc->sc_rbus_memt; 365 } else { 366 return 1; 367 } 368 #endif 369 370 cardbustag = cardbus_make_tag(cc, cf, sc->sc_bus, func); 371 372 cardbus_conf_write(cc, cf, cardbustag, reg, 0); 373 374 #if rbus 375 (*cf->cardbus_space_free)(cc, rbustag, handle, size); 376 #endif 377 378 cardbus_free_tag(cc, cf, cardbustag); 379 380 return st; 381 } 382 383 384 385 386 387 /* 388 * int cardbus_save_bar(cardbus_devfunc_t); 389 * 390 * This function saves the Base Address Registers at the CardBus 391 * function denoted by the argument. 392 */ 393 int cardbus_save_bar(ct) 394 cardbus_devfunc_t ct; 395 { 396 cardbustag_t tag = Cardbus_make_tag(ct); 397 cardbus_chipset_tag_t cc = ct->ct_cc; 398 cardbus_function_tag_t cf = ct->ct_cf; 399 400 ct->ct_bar[0] = cardbus_conf_read(cc, cf, tag, CARDBUS_BASE0_REG); 401 ct->ct_bar[1] = cardbus_conf_read(cc, cf, tag, CARDBUS_BASE1_REG); 402 ct->ct_bar[2] = cardbus_conf_read(cc, cf, tag, CARDBUS_BASE2_REG); 403 ct->ct_bar[3] = cardbus_conf_read(cc, cf, tag, CARDBUS_BASE3_REG); 404 ct->ct_bar[4] = cardbus_conf_read(cc, cf, tag, CARDBUS_BASE4_REG); 405 ct->ct_bar[5] = cardbus_conf_read(cc, cf, tag, CARDBUS_BASE5_REG); 406 407 DPRINTF(("cardbus_save_bar: %x %x\n", ct->ct_bar[0], ct->ct_bar[1])); 408 409 Cardbus_free_tag(ct, tag); 410 411 return 0; 412 } 413 414 415 416 /* 417 * int cardbus_restore_bar(cardbus_devfunc_t); 418 * 419 * This function saves the Base Address Registers at the CardBus 420 * function denoted by the argument. 421 */ 422 int cardbus_restore_bar(ct) 423 cardbus_devfunc_t ct; 424 { 425 cardbustag_t tag = Cardbus_make_tag(ct); 426 cardbus_chipset_tag_t cc = ct->ct_cc; 427 cardbus_function_tag_t cf = ct->ct_cf; 428 429 cardbus_conf_write(cc, cf, tag, CARDBUS_BASE0_REG, ct->ct_bar[0]); 430 cardbus_conf_write(cc, cf, tag, CARDBUS_BASE1_REG, ct->ct_bar[1]); 431 cardbus_conf_write(cc, cf, tag, CARDBUS_BASE2_REG, ct->ct_bar[2]); 432 cardbus_conf_write(cc, cf, tag, CARDBUS_BASE3_REG, ct->ct_bar[3]); 433 cardbus_conf_write(cc, cf, tag, CARDBUS_BASE4_REG, ct->ct_bar[4]); 434 cardbus_conf_write(cc, cf, tag, CARDBUS_BASE5_REG, ct->ct_bar[5]); 435 436 Cardbus_free_tag(ct, tag); 437 438 return 0; 439 } 440
Indexes created Mon Sep 29 21:09:56 GMT 2025