Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
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sys/dev/cfi/cfi_core.c
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1 /*- 2 * Copyright (c) 2007, Juniper Networks, Inc. 3 * Copyright (c) 2012-2013, SRI International 4 * All rights reserved. 5 * 6 * Portions of this software were developed by SRI International and the 7 * University of Cambridge Computer Laboratory under DARPA/AFRL contract 8 * (FA8750-10-C-0237) ("CTSRD"), as part of the DARPA CRASH research 9 * programme. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 3. Neither the name of the author nor the names of any co-contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 24 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 25 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 26 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 27 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 28 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 29 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 30 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 31 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 */ 35 36 #include <sys/cdefs.h> 37 __FBSDID("$FreeBSD: releng/10.3/sys/dev/cfi/cfi_core.c 257524 2013-11-01 20:33:30Z brooks $"); 38 39 #include "opt_cfi.h" 40 41 #include <sys/param.h> 42 #include <sys/systm.h> 43 #include <sys/bus.h> 44 #include <sys/conf.h> 45 #include <sys/endian.h> 46 #include <sys/kenv.h> 47 #include <sys/kernel.h> 48 #include <sys/malloc.h> 49 #include <sys/module.h> 50 #include <sys/rman.h> 51 #include <sys/sysctl.h> 52 53 #include <machine/bus.h> 54 55 #include <dev/cfi/cfi_reg.h> 56 #include <dev/cfi/cfi_var.h> 57 58 static void cfi_add_sysctls(struct cfi_softc *); 59 60 extern struct cdevsw cfi_cdevsw; 61 62 char cfi_driver_name[] = "cfi"; 63 devclass_t cfi_devclass; 64 devclass_t cfi_diskclass; 65 66 uint32_t 67 cfi_read_raw(struct cfi_softc *sc, u_int ofs) 68 { 69 uint32_t val; 70 71 ofs &= ~(sc->sc_width - 1); 72 switch (sc->sc_width) { 73 case 1: 74 val = bus_space_read_1(sc->sc_tag, sc->sc_handle, ofs); 75 break; 76 case 2: 77 val = bus_space_read_2(sc->sc_tag, sc->sc_handle, ofs); 78 break; 79 case 4: 80 val = bus_space_read_4(sc->sc_tag, sc->sc_handle, ofs); 81 break; 82 default: 83 val = ~0; 84 break; 85 } 86 return (val); 87 } 88 89 uint32_t 90 cfi_read(struct cfi_softc *sc, u_int ofs) 91 { 92 uint32_t val; 93 uint16_t sval; 94 95 ofs &= ~(sc->sc_width - 1); 96 switch (sc->sc_width) { 97 case 1: 98 val = bus_space_read_1(sc->sc_tag, sc->sc_handle, ofs); 99 break; 100 case 2: 101 sval = bus_space_read_2(sc->sc_tag, sc->sc_handle, ofs); 102 val = le16toh(sval); 103 break; 104 case 4: 105 val = bus_space_read_4(sc->sc_tag, sc->sc_handle, ofs); 106 val = le32toh(val); 107 break; 108 default: 109 val = ~0; 110 break; 111 } 112 return (val); 113 } 114 115 static void 116 cfi_write(struct cfi_softc *sc, u_int ofs, u_int val) 117 { 118 119 ofs &= ~(sc->sc_width - 1); 120 switch (sc->sc_width) { 121 case 1: 122 bus_space_write_1(sc->sc_tag, sc->sc_handle, ofs, val); 123 break; 124 case 2: 125 bus_space_write_2(sc->sc_tag, sc->sc_handle, ofs, htole16(val)); 126 break; 127 case 4: 128 bus_space_write_4(sc->sc_tag, sc->sc_handle, ofs, htole32(val)); 129 break; 130 } 131 } 132 133 uint8_t 134 cfi_read_qry(struct cfi_softc *sc, u_int ofs) 135 { 136 uint8_t val; 137 138 cfi_write(sc, CFI_QRY_CMD_ADDR * sc->sc_width, CFI_QRY_CMD_DATA); 139 val = cfi_read(sc, ofs * sc->sc_width); 140 cfi_write(sc, 0, CFI_BCS_READ_ARRAY); 141 return (val); 142 } 143 144 static void 145 cfi_amd_write(struct cfi_softc *sc, u_int ofs, u_int addr, u_int data) 146 { 147 148 cfi_write(sc, ofs + AMD_ADDR_START, CFI_AMD_UNLOCK); 149 cfi_write(sc, ofs + AMD_ADDR_ACK, CFI_AMD_UNLOCK_ACK); 150 cfi_write(sc, ofs + addr, data); 151 } 152 153 static char * 154 cfi_fmtsize(uint32_t sz) 155 { 156 static char buf[8]; 157 static const char *sfx[] = { "", "K", "M", "G" }; 158 int sfxidx; 159 160 sfxidx = 0; 161 while (sfxidx < 3 && sz > 1023) { 162 sz /= 1024; 163 sfxidx++; 164 } 165 166 sprintf(buf, "%u%sB", sz, sfx[sfxidx]); 167 return (buf); 168 } 169 170 int 171 cfi_probe(device_t dev) 172 { 173 char desc[80]; 174 struct cfi_softc *sc; 175 char *vend_str; 176 int error; 177 uint16_t iface, vend; 178 179 sc = device_get_softc(dev); 180 sc->sc_dev = dev; 181 182 sc->sc_rid = 0; 183 sc->sc_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &sc->sc_rid, 184 RF_ACTIVE); 185 if (sc->sc_res == NULL) 186 return (ENXIO); 187 188 sc->sc_tag = rman_get_bustag(sc->sc_res); 189 sc->sc_handle = rman_get_bushandle(sc->sc_res); 190 191 if (sc->sc_width == 0) { 192 sc->sc_width = 1; 193 while (sc->sc_width <= 4) { 194 if (cfi_read_qry(sc, CFI_QRY_IDENT) == 'Q') 195 break; 196 sc->sc_width <<= 1; 197 } 198 } else if (cfi_read_qry(sc, CFI_QRY_IDENT) != 'Q') { 199 error = ENXIO; 200 goto out; 201 } 202 if (sc->sc_width > 4) { 203 error = ENXIO; 204 goto out; 205 } 206 207 /* We got a Q. Check if we also have the R and the Y. */ 208 if (cfi_read_qry(sc, CFI_QRY_IDENT + 1) != 'R' || 209 cfi_read_qry(sc, CFI_QRY_IDENT + 2) != 'Y') { 210 error = ENXIO; 211 goto out; 212 } 213 214 /* Get the vendor and command set. */ 215 vend = cfi_read_qry(sc, CFI_QRY_VEND) | 216 (cfi_read_qry(sc, CFI_QRY_VEND + 1) << 8); 217 218 sc->sc_cmdset = vend; 219 220 switch (vend) { 221 case CFI_VEND_AMD_ECS: 222 case CFI_VEND_AMD_SCS: 223 vend_str = "AMD/Fujitsu"; 224 break; 225 case CFI_VEND_INTEL_ECS: 226 vend_str = "Intel/Sharp"; 227 break; 228 case CFI_VEND_INTEL_SCS: 229 vend_str = "Intel"; 230 break; 231 case CFI_VEND_MITSUBISHI_ECS: 232 case CFI_VEND_MITSUBISHI_SCS: 233 vend_str = "Mitsubishi"; 234 break; 235 default: 236 vend_str = "Unknown vendor"; 237 break; 238 } 239 240 /* Get the device size. */ 241 sc->sc_size = 1U << cfi_read_qry(sc, CFI_QRY_SIZE); 242 243 /* Sanity-check the I/F */ 244 iface = cfi_read_qry(sc, CFI_QRY_IFACE) | 245 (cfi_read_qry(sc, CFI_QRY_IFACE + 1) << 8); 246 247 /* 248 * Adding 1 to iface will give us a bit-wise "switch" 249 * that allows us to test for the interface width by 250 * testing a single bit. 251 */ 252 iface++; 253 254 error = (iface & sc->sc_width) ? 0 : EINVAL; 255 if (error) 256 goto out; 257 258 snprintf(desc, sizeof(desc), "%s - %s", vend_str, 259 cfi_fmtsize(sc->sc_size)); 260 device_set_desc_copy(dev, desc); 261 262 out: 263 bus_release_resource(dev, SYS_RES_MEMORY, sc->sc_rid, sc->sc_res); 264 return (error); 265 } 266 267 int 268 cfi_attach(device_t dev) 269 { 270 struct cfi_softc *sc; 271 u_int blksz, blocks; 272 u_int r, u; 273 uint64_t mtoexp, ttoexp; 274 #ifdef CFI_SUPPORT_STRATAFLASH 275 uint64_t ppr; 276 char name[KENV_MNAMELEN], value[32]; 277 #endif 278 279 sc = device_get_softc(dev); 280 sc->sc_dev = dev; 281 282 sc->sc_rid = 0; 283 sc->sc_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &sc->sc_rid, 284 #ifndef ATSE_CFI_HACK 285 RF_ACTIVE); 286 #else 287 RF_ACTIVE | RF_SHAREABLE); 288 #endif 289 if (sc->sc_res == NULL) 290 return (ENXIO); 291 292 sc->sc_tag = rman_get_bustag(sc->sc_res); 293 sc->sc_handle = rman_get_bushandle(sc->sc_res); 294 295 /* Get time-out values for erase, write, and buffer write. */ 296 ttoexp = cfi_read_qry(sc, CFI_QRY_TTO_ERASE); 297 mtoexp = cfi_read_qry(sc, CFI_QRY_MTO_ERASE); 298 if (ttoexp == 0) { 299 device_printf(dev, "erase timeout == 0, using 2^16ms\n"); 300 ttoexp = 16; 301 } 302 if (ttoexp > 41) { 303 device_printf(dev, "insane timeout: 2^%jdms\n", ttoexp); 304 return (EINVAL); 305 } 306 if (mtoexp == 0) { 307 device_printf(dev, "max erase timeout == 0, using 2^%jdms\n", 308 ttoexp + 4); 309 mtoexp = 4; 310 } 311 if (ttoexp + mtoexp > 41) { 312 device_printf(dev, "insane max erase timeout: 2^%jd\n", 313 ttoexp + mtoexp); 314 return (EINVAL); 315 } 316 sc->sc_typical_timeouts[CFI_TIMEOUT_ERASE] = SBT_1MS * (1ULL << ttoexp); 317 sc->sc_max_timeouts[CFI_TIMEOUT_ERASE] = 318 sc->sc_typical_timeouts[CFI_TIMEOUT_ERASE] * (1ULL << mtoexp); 319 320 ttoexp = cfi_read_qry(sc, CFI_QRY_TTO_WRITE); 321 mtoexp = cfi_read_qry(sc, CFI_QRY_MTO_WRITE); 322 if (ttoexp == 0) { 323 device_printf(dev, "write timeout == 0, using 2^18ns\n"); 324 ttoexp = 18; 325 } 326 if (ttoexp > 51) { 327 device_printf(dev, "insane write timeout: 2^%jdus\n", ttoexp); 328 return (EINVAL); 329 } 330 if (mtoexp == 0) { 331 device_printf(dev, "max write timeout == 0, using 2^%jdms\n", 332 ttoexp + 4); 333 mtoexp = 4; 334 } 335 if (ttoexp + mtoexp > 51) { 336 device_printf(dev, "insane max write timeout: 2^%jdus\n", 337 ttoexp + mtoexp); 338 return (EINVAL); 339 } 340 sc->sc_typical_timeouts[CFI_TIMEOUT_WRITE] = SBT_1US * (1ULL << ttoexp); 341 sc->sc_max_timeouts[CFI_TIMEOUT_WRITE] = 342 sc->sc_typical_timeouts[CFI_TIMEOUT_WRITE] * (1ULL << mtoexp); 343 344 ttoexp = cfi_read_qry(sc, CFI_QRY_TTO_BUFWRITE); 345 mtoexp = cfi_read_qry(sc, CFI_QRY_MTO_BUFWRITE); 346 /* Don't check for 0, it means not-supported. */ 347 if (ttoexp > 51) { 348 device_printf(dev, "insane write timeout: 2^%jdus\n", ttoexp); 349 return (EINVAL); 350 } 351 if (ttoexp + mtoexp > 51) { 352 device_printf(dev, "insane max write timeout: 2^%jdus\n", 353 ttoexp + mtoexp); 354 return (EINVAL); 355 } 356 sc->sc_typical_timeouts[CFI_TIMEOUT_BUFWRITE] = 357 SBT_1US * (1ULL << cfi_read_qry(sc, CFI_QRY_TTO_BUFWRITE)); 358 sc->sc_max_timeouts[CFI_TIMEOUT_BUFWRITE] = 359 sc->sc_typical_timeouts[CFI_TIMEOUT_BUFWRITE] * 360 (1ULL << cfi_read_qry(sc, CFI_QRY_MTO_BUFWRITE)); 361 362 /* Get the maximum size of a multibyte program */ 363 if (sc->sc_typical_timeouts[CFI_TIMEOUT_BUFWRITE] != 0) 364 sc->sc_maxbuf = 1 << (cfi_read_qry(sc, CFI_QRY_MAXBUF) | 365 cfi_read_qry(sc, CFI_QRY_MAXBUF) << 8); 366 else 367 sc->sc_maxbuf = 0; 368 369 /* Get erase regions. */ 370 sc->sc_regions = cfi_read_qry(sc, CFI_QRY_NREGIONS); 371 sc->sc_region = malloc(sc->sc_regions * sizeof(struct cfi_region), 372 M_TEMP, M_WAITOK | M_ZERO); 373 for (r = 0; r < sc->sc_regions; r++) { 374 blocks = cfi_read_qry(sc, CFI_QRY_REGION(r)) | 375 (cfi_read_qry(sc, CFI_QRY_REGION(r) + 1) << 8); 376 sc->sc_region[r].r_blocks = blocks + 1; 377 378 blksz = cfi_read_qry(sc, CFI_QRY_REGION(r) + 2) | 379 (cfi_read_qry(sc, CFI_QRY_REGION(r) + 3) << 8); 380 sc->sc_region[r].r_blksz = (blksz == 0) ? 128 : 381 blksz * 256; 382 } 383 384 /* Reset the device to a default state. */ 385 cfi_write(sc, 0, CFI_BCS_CLEAR_STATUS); 386 387 if (bootverbose) { 388 device_printf(dev, "["); 389 for (r = 0; r < sc->sc_regions; r++) { 390 printf("%ux%s%s", sc->sc_region[r].r_blocks, 391 cfi_fmtsize(sc->sc_region[r].r_blksz), 392 (r == sc->sc_regions - 1) ? "]\n" : ","); 393 } 394 } 395 396 u = device_get_unit(dev); 397 sc->sc_nod = make_dev(&cfi_cdevsw, u, UID_ROOT, GID_WHEEL, 0600, 398 "%s%u", cfi_driver_name, u); 399 sc->sc_nod->si_drv1 = sc; 400 401 cfi_add_sysctls(sc); 402 403 #ifdef CFI_SUPPORT_STRATAFLASH 404 /* 405 * Store the Intel factory PPR in the environment. In some 406 * cases it is the most unique ID on a board. 407 */ 408 if (cfi_intel_get_factory_pr(sc, &ppr) == 0) { 409 if (snprintf(name, sizeof(name), "%s.factory_ppr", 410 device_get_nameunit(dev)) < (sizeof(name) - 1) && 411 snprintf(value, sizeof(value), "0x%016jx", ppr) < 412 (sizeof(value) - 1)) 413 (void) setenv(name, value); 414 } 415 #endif 416 417 device_add_child(dev, "cfid", -1); 418 bus_generic_attach(dev); 419 420 return (0); 421 } 422 423 static void 424 cfi_add_sysctls(struct cfi_softc *sc) 425 { 426 struct sysctl_ctx_list *ctx; 427 struct sysctl_oid_list *children; 428 429 ctx = device_get_sysctl_ctx(sc->sc_dev); 430 children = SYSCTL_CHILDREN(device_get_sysctl_tree(sc->sc_dev)); 431 432 SYSCTL_ADD_UINT(ctx, children, OID_AUTO, 433 "typical_erase_timout_count", 434 CTLFLAG_RD, &sc->sc_tto_counts[CFI_TIMEOUT_ERASE], 435 0, "Number of times the typical erase timeout was exceeded"); 436 SYSCTL_ADD_UINT(ctx, children, OID_AUTO, 437 "max_erase_timout_count", 438 CTLFLAG_RD, &sc->sc_mto_counts[CFI_TIMEOUT_ERASE], 0, 439 "Number of times the maximum erase timeout was exceeded"); 440 SYSCTL_ADD_UINT(ctx, children, OID_AUTO, 441 "typical_write_timout_count", 442 CTLFLAG_RD, &sc->sc_tto_counts[CFI_TIMEOUT_WRITE], 0, 443 "Number of times the typical write timeout was exceeded"); 444 SYSCTL_ADD_UINT(ctx, children, OID_AUTO, 445 "max_write_timout_count", 446 CTLFLAG_RD, &sc->sc_mto_counts[CFI_TIMEOUT_WRITE], 0, 447 "Number of times the maximum write timeout was exceeded"); 448 if (sc->sc_maxbuf > 0) { 449 SYSCTL_ADD_UINT(ctx, children, OID_AUTO, 450 "typical_bufwrite_timout_count", 451 CTLFLAG_RD, &sc->sc_tto_counts[CFI_TIMEOUT_BUFWRITE], 0, 452 "Number of times the typical buffered write timeout was " 453 "exceeded"); 454 SYSCTL_ADD_UINT(ctx, children, OID_AUTO, 455 "max_bufwrite_timout_count", 456 CTLFLAG_RD, &sc->sc_mto_counts[CFI_TIMEOUT_BUFWRITE], 0, 457 "Number of times the maximum buffered write timeout was " 458 "exceeded"); 459 } 460 } 461 462 int 463 cfi_detach(device_t dev) 464 { 465 struct cfi_softc *sc; 466 467 sc = device_get_softc(dev); 468 469 destroy_dev(sc->sc_nod); 470 free(sc->sc_region, M_TEMP); 471 bus_release_resource(dev, SYS_RES_MEMORY, sc->sc_rid, sc->sc_res); 472 return (0); 473 } 474 475 static int 476 cfi_wait_ready(struct cfi_softc *sc, u_int ofs, sbintime_t start, 477 enum cfi_wait_cmd cmd) 478 { 479 int done, error, tto_exceeded; 480 uint32_t st0 = 0, st = 0; 481 sbintime_t now; 482 483 done = 0; 484 error = 0; 485 tto_exceeded = 0; 486 while (!done && !error) { 487 /* 488 * Save time before we start so we always do one check 489 * after the timeout has expired. 490 */ 491 now = sbinuptime(); 492 493 switch (sc->sc_cmdset) { 494 case CFI_VEND_INTEL_ECS: 495 case CFI_VEND_INTEL_SCS: 496 st = cfi_read(sc, ofs); 497 done = (st & CFI_INTEL_STATUS_WSMS); 498 if (done) { 499 /* NB: bit 0 is reserved */ 500 st &= ~(CFI_INTEL_XSTATUS_RSVD | 501 CFI_INTEL_STATUS_WSMS | 502 CFI_INTEL_STATUS_RSVD); 503 if (st & CFI_INTEL_STATUS_DPS) 504 error = EPERM; 505 else if (st & CFI_INTEL_STATUS_PSLBS) 506 error = EIO; 507 else if (st & CFI_INTEL_STATUS_ECLBS) 508 error = ENXIO; 509 else if (st) 510 error = EACCES; 511 } 512 break; 513 case CFI_VEND_AMD_SCS: 514 case CFI_VEND_AMD_ECS: 515 st0 = cfi_read(sc, ofs); 516 st = cfi_read(sc, ofs); 517 done = ((st & 0x40) == (st0 & 0x40)) ? 1 : 0; 518 break; 519 } 520 521 if (tto_exceeded || 522 now > start + sc->sc_typical_timeouts[cmd]) { 523 if (!tto_exceeded) { 524 tto_exceeded = 1; 525 sc->sc_tto_counts[cmd]++; 526 #ifdef CFI_DEBUG_TIMEOUT 527 device_printf(sc->sc_dev, 528 "typical timeout exceeded (cmd %d)", cmd); 529 #endif 530 } 531 if (now > start + sc->sc_max_timeouts[cmd]) { 532 sc->sc_mto_counts[cmd]++; 533 #ifdef CFI_DEBUG_TIMEOUT 534 device_printf(sc->sc_dev, 535 "max timeout exceeded (cmd %d)", cmd); 536 #endif 537 } 538 } 539 } 540 if (!done && !error) 541 error = ETIMEDOUT; 542 if (error) 543 printf("\nerror=%d (st 0x%x st0 0x%x)\n", error, st, st0); 544 return (error); 545 } 546 547 int 548 cfi_write_block(struct cfi_softc *sc) 549 { 550 union { 551 uint8_t *x8; 552 uint16_t *x16; 553 uint32_t *x32; 554 } ptr, cpyprt; 555 register_t intr; 556 int error, i, neederase = 0; 557 uint32_t st; 558 u_int wlen; 559 sbintime_t start; 560 561 /* Intel flash must be unlocked before modification */ 562 switch (sc->sc_cmdset) { 563 case CFI_VEND_INTEL_ECS: 564 case CFI_VEND_INTEL_SCS: 565 cfi_write(sc, sc->sc_wrofs, CFI_INTEL_LBS); 566 cfi_write(sc, sc->sc_wrofs, CFI_INTEL_UB); 567 cfi_write(sc, sc->sc_wrofs, CFI_BCS_READ_ARRAY); 568 break; 569 } 570 571 /* Check if an erase is required. */ 572 for (i = 0; i < sc->sc_wrbufsz; i++) 573 if ((sc->sc_wrbuf[i] & sc->sc_wrbufcpy[i]) != sc->sc_wrbuf[i]) { 574 neederase = 1; 575 break; 576 } 577 578 if (neederase) { 579 intr = intr_disable(); 580 start = sbinuptime(); 581 /* Erase the block. */ 582 switch (sc->sc_cmdset) { 583 case CFI_VEND_INTEL_ECS: 584 case CFI_VEND_INTEL_SCS: 585 cfi_write(sc, sc->sc_wrofs, CFI_BCS_BLOCK_ERASE); 586 cfi_write(sc, sc->sc_wrofs, CFI_BCS_CONFIRM); 587 break; 588 case CFI_VEND_AMD_SCS: 589 case CFI_VEND_AMD_ECS: 590 cfi_amd_write(sc, sc->sc_wrofs, AMD_ADDR_START, 591 CFI_AMD_ERASE_SECTOR); 592 cfi_amd_write(sc, sc->sc_wrofs, 0, CFI_AMD_BLOCK_ERASE); 593 break; 594 default: 595 /* Better safe than sorry... */ 596 intr_restore(intr); 597 return (ENODEV); 598 } 599 intr_restore(intr); 600 error = cfi_wait_ready(sc, sc->sc_wrofs, start, 601 CFI_TIMEOUT_ERASE); 602 if (error) 603 goto out; 604 } else 605 error = 0; 606 607 /* Write the block using a multibyte write if supported. */ 608 ptr.x8 = sc->sc_wrbuf; 609 cpyprt.x8 = sc->sc_wrbufcpy; 610 if (sc->sc_maxbuf > sc->sc_width) { 611 switch (sc->sc_cmdset) { 612 case CFI_VEND_INTEL_ECS: 613 case CFI_VEND_INTEL_SCS: 614 for (i = 0; i < sc->sc_wrbufsz; i += wlen) { 615 wlen = MIN(sc->sc_maxbuf, sc->sc_wrbufsz - i); 616 617 intr = intr_disable(); 618 619 start = sbinuptime(); 620 do { 621 cfi_write(sc, sc->sc_wrofs + i, 622 CFI_BCS_BUF_PROG_SETUP); 623 if (sbinuptime() > start + sc->sc_max_timeouts[CFI_TIMEOUT_BUFWRITE]) { 624 error = ETIMEDOUT; 625 goto out; 626 } 627 st = cfi_read(sc, sc->sc_wrofs + i); 628 } while (! (st & CFI_INTEL_STATUS_WSMS)); 629 630 cfi_write(sc, sc->sc_wrofs + i, 631 (wlen / sc->sc_width) - 1); 632 switch (sc->sc_width) { 633 case 1: 634 bus_space_write_region_1(sc->sc_tag, 635 sc->sc_handle, sc->sc_wrofs + i, 636 ptr.x8 + i, wlen); 637 break; 638 case 2: 639 bus_space_write_region_2(sc->sc_tag, 640 sc->sc_handle, sc->sc_wrofs + i, 641 ptr.x16 + i / 2, wlen / 2); 642 break; 643 case 4: 644 bus_space_write_region_4(sc->sc_tag, 645 sc->sc_handle, sc->sc_wrofs + i, 646 ptr.x32 + i / 4, wlen / 4); 647 break; 648 } 649 650 cfi_write(sc, sc->sc_wrofs + i, 651 CFI_BCS_CONFIRM); 652 653 intr_restore(intr); 654 655 error = cfi_wait_ready(sc, sc->sc_wrofs + i, 656 start, CFI_TIMEOUT_BUFWRITE); 657 if (error != 0) 658 goto out; 659 } 660 goto out; 661 default: 662 /* Fall through to single word case */ 663 break; 664 } 665 666 } 667 668 /* Write the block one byte/word at a time. */ 669 for (i = 0; i < sc->sc_wrbufsz; i += sc->sc_width) { 670 671 /* Avoid writing unless we are actually changing bits */ 672 if (!neederase) { 673 switch (sc->sc_width) { 674 case 1: 675 if(*(ptr.x8 + i) == *(cpyprt.x8 + i)) 676 continue; 677 break; 678 case 2: 679 if(*(ptr.x16 + i / 2) == *(cpyprt.x16 + i / 2)) 680 continue; 681 break; 682 case 4: 683 if(*(ptr.x32 + i / 4) == *(cpyprt.x32 + i / 4)) 684 continue; 685 break; 686 } 687 } 688 689 /* 690 * Make sure the command to start a write and the 691 * actual write happens back-to-back without any 692 * excessive delays. 693 */ 694 intr = intr_disable(); 695 696 start = sbinuptime(); 697 switch (sc->sc_cmdset) { 698 case CFI_VEND_INTEL_ECS: 699 case CFI_VEND_INTEL_SCS: 700 cfi_write(sc, sc->sc_wrofs + i, CFI_BCS_PROGRAM); 701 break; 702 case CFI_VEND_AMD_SCS: 703 case CFI_VEND_AMD_ECS: 704 cfi_amd_write(sc, 0, AMD_ADDR_START, CFI_AMD_PROGRAM); 705 break; 706 } 707 switch (sc->sc_width) { 708 case 1: 709 bus_space_write_1(sc->sc_tag, sc->sc_handle, 710 sc->sc_wrofs + i, *(ptr.x8 + i)); 711 break; 712 case 2: 713 bus_space_write_2(sc->sc_tag, sc->sc_handle, 714 sc->sc_wrofs + i, *(ptr.x16 + i / 2)); 715 break; 716 case 4: 717 bus_space_write_4(sc->sc_tag, sc->sc_handle, 718 sc->sc_wrofs + i, *(ptr.x32 + i / 4)); 719 break; 720 } 721 722 intr_restore(intr); 723 724 error = cfi_wait_ready(sc, sc->sc_wrofs, start, 725 CFI_TIMEOUT_WRITE); 726 if (error) 727 goto out; 728 } 729 730 /* error is 0. */ 731 732 out: 733 cfi_write(sc, 0, CFI_BCS_READ_ARRAY); 734 735 /* Relock Intel flash */ 736 switch (sc->sc_cmdset) { 737 case CFI_VEND_INTEL_ECS: 738 case CFI_VEND_INTEL_SCS: 739 cfi_write(sc, sc->sc_wrofs, CFI_INTEL_LBS); 740 cfi_write(sc, sc->sc_wrofs, CFI_INTEL_LB); 741 cfi_write(sc, sc->sc_wrofs, CFI_BCS_READ_ARRAY); 742 break; 743 } 744 return (error); 745 } 746 747 #ifdef CFI_SUPPORT_STRATAFLASH 748 /* 749 * Intel StrataFlash Protection Register Support. 750 * 751 * The memory includes a 128-bit Protection Register that can be 752 * used for security. There are two 64-bit segments; one is programmed 753 * at the factory with a unique 64-bit number which is immutable. 754 * The other segment is left blank for User (OEM) programming. 755 * The User/OEM segment is One Time Programmable (OTP). It can also 756 * be locked to prevent any further writes by setting bit 0 of the 757 * Protection Lock Register (PLR). The PLR can written only once. 758 */ 759 760 static uint16_t 761 cfi_get16(struct cfi_softc *sc, int off) 762 { 763 uint16_t v = bus_space_read_2(sc->sc_tag, sc->sc_handle, off<<1); 764 return v; 765 } 766 767 #ifdef CFI_ARMEDANDDANGEROUS 768 static void 769 cfi_put16(struct cfi_softc *sc, int off, uint16_t v) 770 { 771 bus_space_write_2(sc->sc_tag, sc->sc_handle, off<<1, v); 772 } 773 #endif 774 775 /* 776 * Read the factory-defined 64-bit segment of the PR. 777 */ 778 int 779 cfi_intel_get_factory_pr(struct cfi_softc *sc, uint64_t *id) 780 { 781 if (sc->sc_cmdset != CFI_VEND_INTEL_ECS) 782 return EOPNOTSUPP; 783 KASSERT(sc->sc_width == 2, ("sc_width %d", sc->sc_width)); 784 785 cfi_write(sc, 0, CFI_INTEL_READ_ID); 786 *id = ((uint64_t)cfi_get16(sc, CFI_INTEL_PR(0)))<<48 | 787 ((uint64_t)cfi_get16(sc, CFI_INTEL_PR(1)))<<32 | 788 ((uint64_t)cfi_get16(sc, CFI_INTEL_PR(2)))<<16 | 789 ((uint64_t)cfi_get16(sc, CFI_INTEL_PR(3))); 790 cfi_write(sc, 0, CFI_BCS_READ_ARRAY); 791 return 0; 792 } 793 794 /* 795 * Read the User/OEM 64-bit segment of the PR. 796 */ 797 int 798 cfi_intel_get_oem_pr(struct cfi_softc *sc, uint64_t *id) 799 { 800 if (sc->sc_cmdset != CFI_VEND_INTEL_ECS) 801 return EOPNOTSUPP; 802 KASSERT(sc->sc_width == 2, ("sc_width %d", sc->sc_width)); 803 804 cfi_write(sc, 0, CFI_INTEL_READ_ID); 805 *id = ((uint64_t)cfi_get16(sc, CFI_INTEL_PR(4)))<<48 | 806 ((uint64_t)cfi_get16(sc, CFI_INTEL_PR(5)))<<32 | 807 ((uint64_t)cfi_get16(sc, CFI_INTEL_PR(6)))<<16 | 808 ((uint64_t)cfi_get16(sc, CFI_INTEL_PR(7))); 809 cfi_write(sc, 0, CFI_BCS_READ_ARRAY); 810 return 0; 811 } 812 813 /* 814 * Write the User/OEM 64-bit segment of the PR. 815 * XXX should allow writing individual words/bytes 816 */ 817 int 818 cfi_intel_set_oem_pr(struct cfi_softc *sc, uint64_t id) 819 { 820 #ifdef CFI_ARMEDANDDANGEROUS 821 register_t intr; 822 int i, error; 823 sbintime_t start; 824 #endif 825 826 if (sc->sc_cmdset != CFI_VEND_INTEL_ECS) 827 return EOPNOTSUPP; 828 KASSERT(sc->sc_width == 2, ("sc_width %d", sc->sc_width)); 829 830 #ifdef CFI_ARMEDANDDANGEROUS 831 for (i = 7; i >= 4; i--, id >>= 16) { 832 intr = intr_disable(); 833 start = sbinuptime(); 834 cfi_write(sc, 0, CFI_INTEL_PP_SETUP); 835 cfi_put16(sc, CFI_INTEL_PR(i), id&0xffff); 836 intr_restore(intr); 837 error = cfi_wait_ready(sc, CFI_BCS_READ_STATUS, start, 838 CFI_TIMEOUT_WRITE); 839 if (error) 840 break; 841 } 842 cfi_write(sc, 0, CFI_BCS_READ_ARRAY); 843 return error; 844 #else 845 device_printf(sc->sc_dev, "%s: OEM PR not set, " 846 "CFI_ARMEDANDDANGEROUS not configured\n", __func__); 847 return ENXIO; 848 #endif 849 } 850 851 /* 852 * Read the contents of the Protection Lock Register. 853 */ 854 int 855 cfi_intel_get_plr(struct cfi_softc *sc, uint32_t *plr) 856 { 857 if (sc->sc_cmdset != CFI_VEND_INTEL_ECS) 858 return EOPNOTSUPP; 859 KASSERT(sc->sc_width == 2, ("sc_width %d", sc->sc_width)); 860 861 cfi_write(sc, 0, CFI_INTEL_READ_ID); 862 *plr = cfi_get16(sc, CFI_INTEL_PLR); 863 cfi_write(sc, 0, CFI_BCS_READ_ARRAY); 864 return 0; 865 } 866 867 /* 868 * Write the Protection Lock Register to lock down the 869 * user-settable segment of the Protection Register. 870 * NOTE: this operation is not reversible. 871 */ 872 int 873 cfi_intel_set_plr(struct cfi_softc *sc) 874 { 875 #ifdef CFI_ARMEDANDDANGEROUS 876 register_t intr; 877 int error; 878 sbintime_t start; 879 #endif 880 if (sc->sc_cmdset != CFI_VEND_INTEL_ECS) 881 return EOPNOTSUPP; 882 KASSERT(sc->sc_width == 2, ("sc_width %d", sc->sc_width)); 883 884 #ifdef CFI_ARMEDANDDANGEROUS 885 /* worthy of console msg */ 886 device_printf(sc->sc_dev, "set PLR\n"); 887 intr = intr_disable(); 888 binuptime(&start); 889 cfi_write(sc, 0, CFI_INTEL_PP_SETUP); 890 cfi_put16(sc, CFI_INTEL_PLR, 0xFFFD); 891 intr_restore(intr); 892 error = cfi_wait_ready(sc, CFI_BCS_READ_STATUS, start, 893 CFI_TIMEOUT_WRITE); 894 cfi_write(sc, 0, CFI_BCS_READ_ARRAY); 895 return error; 896 #else 897 device_printf(sc->sc_dev, "%s: PLR not set, " 898 "CFI_ARMEDANDDANGEROUS not configured\n", __func__); 899 return ENXIO; 900 #endif 901 } 902 #endif /* CFI_SUPPORT_STRATAFLASH */
Cache object: e86f5c0d0615a4b35310bd1bc878a397
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