1 /* 2 * Flash NAND memory emulation. Based on "16M x 8 Bit NAND Flash 3 * Memory" datasheet for the KM29U128AT / K9F2808U0A chips from 4 * Samsung Electronic. 5 * 6 * Copyright (c) 2006 Openedhand Ltd. 7 * Written by Andrzej Zaborowski <balrog@zabor.org> 8 * 9 * Support for additional features based on "MT29F2G16ABCWP 2Gx16" 10 * datasheet from Micron Technology and "NAND02G-B2C" datasheet 11 * from ST Microelectronics. 12 * 13 * This code is licensed under the GNU GPL v2. 14 * 15 * Contributions after 2012-01-13 are licensed under the terms of the 16 * GNU GPL, version 2 or (at your option) any later version. 17 */ 18 19 #ifndef NAND_IO 20 21 #include "qemu/osdep.h" 22 #include "hw/hw.h" 23 #include "hw/block/flash.h" 24 #include "sysemu/block-backend.h" 25 #include "hw/qdev.h" 26 #include "qapi/error.h" 27 #include "qemu/error-report.h" 28 29 # define NAND_CMD_READ0 0x00 30 # define NAND_CMD_READ1 0x01 31 # define NAND_CMD_READ2 0x50 32 # define NAND_CMD_LPREAD2 0x30 33 # define NAND_CMD_NOSERIALREAD2 0x35 34 # define NAND_CMD_RANDOMREAD1 0x05 35 # define NAND_CMD_RANDOMREAD2 0xe0 36 # define NAND_CMD_READID 0x90 37 # define NAND_CMD_RESET 0xff 38 # define NAND_CMD_PAGEPROGRAM1 0x80 39 # define NAND_CMD_PAGEPROGRAM2 0x10 40 # define NAND_CMD_CACHEPROGRAM2 0x15 41 # define NAND_CMD_BLOCKERASE1 0x60 42 # define NAND_CMD_BLOCKERASE2 0xd0 43 # define NAND_CMD_READSTATUS 0x70 44 # define NAND_CMD_COPYBACKPRG1 0x85 45 46 # define NAND_IOSTATUS_ERROR (1 << 0) 47 # define NAND_IOSTATUS_PLANE0 (1 << 1) 48 # define NAND_IOSTATUS_PLANE1 (1 << 2) 49 # define NAND_IOSTATUS_PLANE2 (1 << 3) 50 # define NAND_IOSTATUS_PLANE3 (1 << 4) 51 # define NAND_IOSTATUS_READY (1 << 6) 52 # define NAND_IOSTATUS_UNPROTCT (1 << 7) 53 54 # define MAX_PAGE 0x800 55 # define MAX_OOB 0x40 56 57 typedef struct NANDFlashState NANDFlashState; 58 struct NANDFlashState { 59 DeviceState parent_obj; 60 61 uint8_t manf_id, chip_id; 62 uint8_t buswidth; /* in BYTES */ 63 int size, pages; 64 int page_shift, oob_shift, erase_shift, addr_shift; 65 uint8_t *storage; 66 BlockBackend *blk; 67 int mem_oob; 68 69 uint8_t cle, ale, ce, wp, gnd; 70 71 uint8_t io[MAX_PAGE + MAX_OOB + 0x400]; 72 uint8_t *ioaddr; 73 int iolen; 74 75 uint32_t cmd; 76 uint64_t addr; 77 int addrlen; 78 int status; 79 int offset; 80 81 void (*blk_write)(NANDFlashState *s); 82 void (*blk_erase)(NANDFlashState *s); 83 void (*blk_load)(NANDFlashState *s, uint64_t addr, int offset); 84 85 uint32_t ioaddr_vmstate; 86 }; 87 88 #define TYPE_NAND "nand" 89 90 #define NAND(obj) \ 91 OBJECT_CHECK(NANDFlashState, (obj), TYPE_NAND) 92 93 static void mem_and(uint8_t *dest, const uint8_t *src, size_t n) 94 { 95 /* Like memcpy() but we logical-AND the data into the destination */ 96 int i; 97 for (i = 0; i < n; i++) { 98 dest[i] &= src[i]; 99 } 100 } 101 102 # define NAND_NO_AUTOINCR 0x00000001 103 # define NAND_BUSWIDTH_16 0x00000002 104 # define NAND_NO_PADDING 0x00000004 105 # define NAND_CACHEPRG 0x00000008 106 # define NAND_COPYBACK 0x00000010 107 # define NAND_IS_AND 0x00000020 108 # define NAND_4PAGE_ARRAY 0x00000040 109 # define NAND_NO_READRDY 0x00000100 110 # define NAND_SAMSUNG_LP (NAND_NO_PADDING | NAND_COPYBACK) 111 112 # define NAND_IO 113 114 # define PAGE(addr) ((addr) >> ADDR_SHIFT) 115 # define PAGE_START(page) (PAGE(page) * (PAGE_SIZE + OOB_SIZE)) 116 # define PAGE_MASK ((1 << ADDR_SHIFT) - 1) 117 # define OOB_SHIFT (PAGE_SHIFT - 5) 118 # define OOB_SIZE (1 << OOB_SHIFT) 119 # define SECTOR(addr) ((addr) >> (9 + ADDR_SHIFT - PAGE_SHIFT)) 120 # define SECTOR_OFFSET(addr) ((addr) & ((511 >> PAGE_SHIFT) << 8)) 121 122 # define PAGE_SIZE 256 123 # define PAGE_SHIFT 8 124 # define PAGE_SECTORS 1 125 # define ADDR_SHIFT 8 126 # include "nand.c" 127 # define PAGE_SIZE 512 128 # define PAGE_SHIFT 9 129 # define PAGE_SECTORS 1 130 # define ADDR_SHIFT 8 131 # include "nand.c" 132 # define PAGE_SIZE 2048 133 # define PAGE_SHIFT 11 134 # define PAGE_SECTORS 4 135 # define ADDR_SHIFT 16 136 # include "nand.c" 137 138 /* Information based on Linux drivers/mtd/nand/nand_ids.c */ 139 static const struct { 140 int size; 141 int width; 142 int page_shift; 143 int erase_shift; 144 uint32_t options; 145 } nand_flash_ids[0x100] = { 146 [0 ... 0xff] = { 0 }, 147 148 [0x6e] = { 1, 8, 8, 4, 0 }, 149 [0x64] = { 2, 8, 8, 4, 0 }, 150 [0x6b] = { 4, 8, 9, 4, 0 }, 151 [0xe8] = { 1, 8, 8, 4, 0 }, 152 [0xec] = { 1, 8, 8, 4, 0 }, 153 [0xea] = { 2, 8, 8, 4, 0 }, 154 [0xd5] = { 4, 8, 9, 4, 0 }, 155 [0xe3] = { 4, 8, 9, 4, 0 }, 156 [0xe5] = { 4, 8, 9, 4, 0 }, 157 [0xd6] = { 8, 8, 9, 4, 0 }, 158 159 [0x39] = { 8, 8, 9, 4, 0 }, 160 [0xe6] = { 8, 8, 9, 4, 0 }, 161 [0x49] = { 8, 16, 9, 4, NAND_BUSWIDTH_16 }, 162 [0x59] = { 8, 16, 9, 4, NAND_BUSWIDTH_16 }, 163 164 [0x33] = { 16, 8, 9, 5, 0 }, 165 [0x73] = { 16, 8, 9, 5, 0 }, 166 [0x43] = { 16, 16, 9, 5, NAND_BUSWIDTH_16 }, 167 [0x53] = { 16, 16, 9, 5, NAND_BUSWIDTH_16 }, 168 169 [0x35] = { 32, 8, 9, 5, 0 }, 170 [0x75] = { 32, 8, 9, 5, 0 }, 171 [0x45] = { 32, 16, 9, 5, NAND_BUSWIDTH_16 }, 172 [0x55] = { 32, 16, 9, 5, NAND_BUSWIDTH_16 }, 173 174 [0x36] = { 64, 8, 9, 5, 0 }, 175 [0x76] = { 64, 8, 9, 5, 0 }, 176 [0x46] = { 64, 16, 9, 5, NAND_BUSWIDTH_16 }, 177 [0x56] = { 64, 16, 9, 5, NAND_BUSWIDTH_16 }, 178 179 [0x78] = { 128, 8, 9, 5, 0 }, 180 [0x39] = { 128, 8, 9, 5, 0 }, 181 [0x79] = { 128, 8, 9, 5, 0 }, 182 [0x72] = { 128, 16, 9, 5, NAND_BUSWIDTH_16 }, 183 [0x49] = { 128, 16, 9, 5, NAND_BUSWIDTH_16 }, 184 [0x74] = { 128, 16, 9, 5, NAND_BUSWIDTH_16 }, 185 [0x59] = { 128, 16, 9, 5, NAND_BUSWIDTH_16 }, 186 187 [0x71] = { 256, 8, 9, 5, 0 }, 188 189 /* 190 * These are the new chips with large page size. The pagesize and the 191 * erasesize is determined from the extended id bytes 192 */ 193 # define LP_OPTIONS (NAND_SAMSUNG_LP | NAND_NO_READRDY | NAND_NO_AUTOINCR) 194 # define LP_OPTIONS16 (LP_OPTIONS | NAND_BUSWIDTH_16) 195 196 /* 512 Megabit */ 197 [0xa2] = { 64, 8, 0, 0, LP_OPTIONS }, 198 [0xf2] = { 64, 8, 0, 0, LP_OPTIONS }, 199 [0xb2] = { 64, 16, 0, 0, LP_OPTIONS16 }, 200 [0xc2] = { 64, 16, 0, 0, LP_OPTIONS16 }, 201 202 /* 1 Gigabit */ 203 [0xa1] = { 128, 8, 0, 0, LP_OPTIONS }, 204 [0xf1] = { 128, 8, 0, 0, LP_OPTIONS }, 205 [0xb1] = { 128, 16, 0, 0, LP_OPTIONS16 }, 206 [0xc1] = { 128, 16, 0, 0, LP_OPTIONS16 }, 207 208 /* 2 Gigabit */ 209 [0xaa] = { 256, 8, 0, 0, LP_OPTIONS }, 210 [0xda] = { 256, 8, 0, 0, LP_OPTIONS }, 211 [0xba] = { 256, 16, 0, 0, LP_OPTIONS16 }, 212 [0xca] = { 256, 16, 0, 0, LP_OPTIONS16 }, 213 214 /* 4 Gigabit */ 215 [0xac] = { 512, 8, 0, 0, LP_OPTIONS }, 216 [0xdc] = { 512, 8, 0, 0, LP_OPTIONS }, 217 [0xbc] = { 512, 16, 0, 0, LP_OPTIONS16 }, 218 [0xcc] = { 512, 16, 0, 0, LP_OPTIONS16 }, 219 220 /* 8 Gigabit */ 221 [0xa3] = { 1024, 8, 0, 0, LP_OPTIONS }, 222 [0xd3] = { 1024, 8, 0, 0, LP_OPTIONS }, 223 [0xb3] = { 1024, 16, 0, 0, LP_OPTIONS16 }, 224 [0xc3] = { 1024, 16, 0, 0, LP_OPTIONS16 }, 225 226 /* 16 Gigabit */ 227 [0xa5] = { 2048, 8, 0, 0, LP_OPTIONS }, 228 [0xd5] = { 2048, 8, 0, 0, LP_OPTIONS }, 229 [0xb5] = { 2048, 16, 0, 0, LP_OPTIONS16 }, 230 [0xc5] = { 2048, 16, 0, 0, LP_OPTIONS16 }, 231 }; 232 233 static void nand_reset(DeviceState *dev) 234 { 235 NANDFlashState *s = NAND(dev); 236 s->cmd = NAND_CMD_READ0; 237 s->addr = 0; 238 s->addrlen = 0; 239 s->iolen = 0; 240 s->offset = 0; 241 s->status &= NAND_IOSTATUS_UNPROTCT; 242 s->status |= NAND_IOSTATUS_READY; 243 } 244 245 static inline void nand_pushio_byte(NANDFlashState *s, uint8_t value) 246 { 247 s->ioaddr[s->iolen++] = value; 248 for (value = s->buswidth; --value;) { 249 s->ioaddr[s->iolen++] = 0; 250 } 251 } 252 253 static void nand_command(NANDFlashState *s) 254 { 255 unsigned int offset; 256 switch (s->cmd) { 257 case NAND_CMD_READ0: 258 s->iolen = 0; 259 break; 260 261 case NAND_CMD_READID: 262 s->ioaddr = s->io; 263 s->iolen = 0; 264 nand_pushio_byte(s, s->manf_id); 265 nand_pushio_byte(s, s->chip_id); 266 nand_pushio_byte(s, 'Q'); /* Don't-care byte (often 0xa5) */ 267 if (nand_flash_ids[s->chip_id].options & NAND_SAMSUNG_LP) { 268 /* Page Size, Block Size, Spare Size; bit 6 indicates 269 * 8 vs 16 bit width NAND. 270 */ 271 nand_pushio_byte(s, (s->buswidth == 2) ? 0x55 : 0x15); 272 } else { 273 nand_pushio_byte(s, 0xc0); /* Multi-plane */ 274 } 275 break; 276 277 case NAND_CMD_RANDOMREAD2: 278 case NAND_CMD_NOSERIALREAD2: 279 if (!(nand_flash_ids[s->chip_id].options & NAND_SAMSUNG_LP)) 280 break; 281 offset = s->addr & ((1 << s->addr_shift) - 1); 282 s->blk_load(s, s->addr, offset); 283 if (s->gnd) 284 s->iolen = (1 << s->page_shift) - offset; 285 else 286 s->iolen = (1 << s->page_shift) + (1 << s->oob_shift) - offset; 287 break; 288 289 case NAND_CMD_RESET: 290 nand_reset(DEVICE(s)); 291 break; 292 293 case NAND_CMD_PAGEPROGRAM1: 294 s->ioaddr = s->io; 295 s->iolen = 0; 296 break; 297 298 case NAND_CMD_PAGEPROGRAM2: 299 if (s->wp) { 300 s->blk_write(s); 301 } 302 break; 303 304 case NAND_CMD_BLOCKERASE1: 305 break; 306 307 case NAND_CMD_BLOCKERASE2: 308 s->addr &= (1ull << s->addrlen * 8) - 1; 309 s->addr <<= nand_flash_ids[s->chip_id].options & NAND_SAMSUNG_LP ? 310 16 : 8; 311 312 if (s->wp) { 313 s->blk_erase(s); 314 } 315 break; 316 317 case NAND_CMD_READSTATUS: 318 s->ioaddr = s->io; 319 s->iolen = 0; 320 nand_pushio_byte(s, s->status); 321 break; 322 323 default: 324 printf("%s: Unknown NAND command 0x%02x\n", __FUNCTION__, s->cmd); 325 } 326 } 327 328 static void nand_pre_save(void *opaque) 329 { 330 NANDFlashState *s = NAND(opaque); 331 332 s->ioaddr_vmstate = s->ioaddr - s->io; 333 } 334 335 static int nand_post_load(void *opaque, int version_id) 336 { 337 NANDFlashState *s = NAND(opaque); 338 339 if (s->ioaddr_vmstate > sizeof(s->io)) { 340 return -EINVAL; 341 } 342 s->ioaddr = s->io + s->ioaddr_vmstate; 343 344 return 0; 345 } 346 347 static const VMStateDescription vmstate_nand = { 348 .name = "nand", 349 .version_id = 1, 350 .minimum_version_id = 1, 351 .pre_save = nand_pre_save, 352 .post_load = nand_post_load, 353 .fields = (VMStateField[]) { 354 VMSTATE_UINT8(cle, NANDFlashState), 355 VMSTATE_UINT8(ale, NANDFlashState), 356 VMSTATE_UINT8(ce, NANDFlashState), 357 VMSTATE_UINT8(wp, NANDFlashState), 358 VMSTATE_UINT8(gnd, NANDFlashState), 359 VMSTATE_BUFFER(io, NANDFlashState), 360 VMSTATE_UINT32(ioaddr_vmstate, NANDFlashState), 361 VMSTATE_INT32(iolen, NANDFlashState), 362 VMSTATE_UINT32(cmd, NANDFlashState), 363 VMSTATE_UINT64(addr, NANDFlashState), 364 VMSTATE_INT32(addrlen, NANDFlashState), 365 VMSTATE_INT32(status, NANDFlashState), 366 VMSTATE_INT32(offset, NANDFlashState), 367 /* XXX: do we want to save s->storage too? */ 368 VMSTATE_END_OF_LIST() 369 } 370 }; 371 372 static void nand_realize(DeviceState *dev, Error **errp) 373 { 374 int pagesize; 375 NANDFlashState *s = NAND(dev); 376 377 s->buswidth = nand_flash_ids[s->chip_id].width >> 3; 378 s->size = nand_flash_ids[s->chip_id].size << 20; 379 if (nand_flash_ids[s->chip_id].options & NAND_SAMSUNG_LP) { 380 s->page_shift = 11; 381 s->erase_shift = 6; 382 } else { 383 s->page_shift = nand_flash_ids[s->chip_id].page_shift; 384 s->erase_shift = nand_flash_ids[s->chip_id].erase_shift; 385 } 386 387 switch (1 << s->page_shift) { 388 case 256: 389 nand_init_256(s); 390 break; 391 case 512: 392 nand_init_512(s); 393 break; 394 case 2048: 395 nand_init_2048(s); 396 break; 397 default: 398 error_setg(errp, "Unsupported NAND block size %#x", 399 1 << s->page_shift); 400 return; 401 } 402 403 pagesize = 1 << s->oob_shift; 404 s->mem_oob = 1; 405 if (s->blk) { 406 if (blk_is_read_only(s->blk)) { 407 error_setg(errp, "Can't use a read-only drive"); 408 return; 409 } 410 if (blk_getlength(s->blk) >= 411 (s->pages << s->page_shift) + (s->pages << s->oob_shift)) { 412 pagesize = 0; 413 s->mem_oob = 0; 414 } 415 } else { 416 pagesize += 1 << s->page_shift; 417 } 418 if (pagesize) { 419 s->storage = (uint8_t *) memset(g_malloc(s->pages * pagesize), 420 0xff, s->pages * pagesize); 421 } 422 /* Give s->ioaddr a sane value in case we save state before it is used. */ 423 s->ioaddr = s->io; 424 } 425 426 static Property nand_properties[] = { 427 DEFINE_PROP_UINT8("manufacturer_id", NANDFlashState, manf_id, 0), 428 DEFINE_PROP_UINT8("chip_id", NANDFlashState, chip_id, 0), 429 DEFINE_PROP_DRIVE("drive", NANDFlashState, blk), 430 DEFINE_PROP_END_OF_LIST(), 431 }; 432 433 static void nand_class_init(ObjectClass *klass, void *data) 434 { 435 DeviceClass *dc = DEVICE_CLASS(klass); 436 437 dc->realize = nand_realize; 438 dc->reset = nand_reset; 439 dc->vmsd = &vmstate_nand; 440 dc->props = nand_properties; 441 } 442 443 static const TypeInfo nand_info = { 444 .name = TYPE_NAND, 445 .parent = TYPE_DEVICE, 446 .instance_size = sizeof(NANDFlashState), 447 .class_init = nand_class_init, 448 }; 449 450 static void nand_register_types(void) 451 { 452 type_register_static(&nand_info); 453 } 454 455 /* 456 * Chip inputs are CLE, ALE, CE, WP, GND and eight I/O pins. Chip 457 * outputs are R/B and eight I/O pins. 458 * 459 * CE, WP and R/B are active low. 460 */ 461 void nand_setpins(DeviceState *dev, uint8_t cle, uint8_t ale, 462 uint8_t ce, uint8_t wp, uint8_t gnd) 463 { 464 NANDFlashState *s = NAND(dev); 465 466 s->cle = cle; 467 s->ale = ale; 468 s->ce = ce; 469 s->wp = wp; 470 s->gnd = gnd; 471 if (wp) { 472 s->status |= NAND_IOSTATUS_UNPROTCT; 473 } else { 474 s->status &= ~NAND_IOSTATUS_UNPROTCT; 475 } 476 } 477 478 void nand_getpins(DeviceState *dev, int *rb) 479 { 480 *rb = 1; 481 } 482 483 void nand_setio(DeviceState *dev, uint32_t value) 484 { 485 int i; 486 NANDFlashState *s = NAND(dev); 487 488 if (!s->ce && s->cle) { 489 if (nand_flash_ids[s->chip_id].options & NAND_SAMSUNG_LP) { 490 if (s->cmd == NAND_CMD_READ0 && value == NAND_CMD_LPREAD2) 491 return; 492 if (value == NAND_CMD_RANDOMREAD1) { 493 s->addr &= ~((1 << s->addr_shift) - 1); 494 s->addrlen = 0; 495 return; 496 } 497 } 498 if (value == NAND_CMD_READ0) { 499 s->offset = 0; 500 } else if (value == NAND_CMD_READ1) { 501 s->offset = 0x100; 502 value = NAND_CMD_READ0; 503 } else if (value == NAND_CMD_READ2) { 504 s->offset = 1 << s->page_shift; 505 value = NAND_CMD_READ0; 506 } 507 508 s->cmd = value; 509 510 if (s->cmd == NAND_CMD_READSTATUS || 511 s->cmd == NAND_CMD_PAGEPROGRAM2 || 512 s->cmd == NAND_CMD_BLOCKERASE1 || 513 s->cmd == NAND_CMD_BLOCKERASE2 || 514 s->cmd == NAND_CMD_NOSERIALREAD2 || 515 s->cmd == NAND_CMD_RANDOMREAD2 || 516 s->cmd == NAND_CMD_RESET) { 517 nand_command(s); 518 } 519 520 if (s->cmd != NAND_CMD_RANDOMREAD2) { 521 s->addrlen = 0; 522 } 523 } 524 525 if (s->ale) { 526 unsigned int shift = s->addrlen * 8; 527 uint64_t mask = ~(0xffull << shift); 528 uint64_t v = (uint64_t)value << shift; 529 530 s->addr = (s->addr & mask) | v; 531 s->addrlen ++; 532 533 switch (s->addrlen) { 534 case 1: 535 if (s->cmd == NAND_CMD_READID) { 536 nand_command(s); 537 } 538 break; 539 case 2: /* fix cache address as a byte address */ 540 s->addr <<= (s->buswidth - 1); 541 break; 542 case 3: 543 if (!(nand_flash_ids[s->chip_id].options & NAND_SAMSUNG_LP) && 544 (s->cmd == NAND_CMD_READ0 || 545 s->cmd == NAND_CMD_PAGEPROGRAM1)) { 546 nand_command(s); 547 } 548 break; 549 case 4: 550 if ((nand_flash_ids[s->chip_id].options & NAND_SAMSUNG_LP) && 551 nand_flash_ids[s->chip_id].size < 256 && /* 1Gb or less */ 552 (s->cmd == NAND_CMD_READ0 || 553 s->cmd == NAND_CMD_PAGEPROGRAM1)) { 554 nand_command(s); 555 } 556 break; 557 case 5: 558 if ((nand_flash_ids[s->chip_id].options & NAND_SAMSUNG_LP) && 559 nand_flash_ids[s->chip_id].size >= 256 && /* 2Gb or more */ 560 (s->cmd == NAND_CMD_READ0 || 561 s->cmd == NAND_CMD_PAGEPROGRAM1)) { 562 nand_command(s); 563 } 564 break; 565 default: 566 break; 567 } 568 } 569 570 if (!s->cle && !s->ale && s->cmd == NAND_CMD_PAGEPROGRAM1) { 571 if (s->iolen < (1 << s->page_shift) + (1 << s->oob_shift)) { 572 for (i = s->buswidth; i--; value >>= 8) { 573 s->io[s->iolen ++] = (uint8_t) (value & 0xff); 574 } 575 } 576 } else if (!s->cle && !s->ale && s->cmd == NAND_CMD_COPYBACKPRG1) { 577 if ((s->addr & ((1 << s->addr_shift) - 1)) < 578 (1 << s->page_shift) + (1 << s->oob_shift)) { 579 for (i = s->buswidth; i--; s->addr++, value >>= 8) { 580 s->io[s->iolen + (s->addr & ((1 << s->addr_shift) - 1))] = 581 (uint8_t) (value & 0xff); 582 } 583 } 584 } 585 } 586 587 uint32_t nand_getio(DeviceState *dev) 588 { 589 int offset; 590 uint32_t x = 0; 591 NANDFlashState *s = NAND(dev); 592 593 /* Allow sequential reading */ 594 if (!s->iolen && s->cmd == NAND_CMD_READ0) { 595 offset = (int) (s->addr & ((1 << s->addr_shift) - 1)) + s->offset; 596 s->offset = 0; 597 598 s->blk_load(s, s->addr, offset); 599 if (s->gnd) 600 s->iolen = (1 << s->page_shift) - offset; 601 else 602 s->iolen = (1 << s->page_shift) + (1 << s->oob_shift) - offset; 603 } 604 605 if (s->ce || s->iolen <= 0) { 606 return 0; 607 } 608 609 for (offset = s->buswidth; offset--;) { 610 x |= s->ioaddr[offset] << (offset << 3); 611 } 612 /* after receiving READ STATUS command all subsequent reads will 613 * return the status register value until another command is issued 614 */ 615 if (s->cmd != NAND_CMD_READSTATUS) { 616 s->addr += s->buswidth; 617 s->ioaddr += s->buswidth; 618 s->iolen -= s->buswidth; 619 } 620 return x; 621 } 622 623 uint32_t nand_getbuswidth(DeviceState *dev) 624 { 625 NANDFlashState *s = (NANDFlashState *) dev; 626 return s->buswidth << 3; 627 } 628 629 DeviceState *nand_init(BlockBackend *blk, int manf_id, int chip_id) 630 { 631 DeviceState *dev; 632 633 if (nand_flash_ids[chip_id].size == 0) { 634 hw_error("%s: Unsupported NAND chip ID.\n", __FUNCTION__); 635 } 636 dev = DEVICE(object_new(TYPE_NAND)); 637 qdev_prop_set_uint8(dev, "manufacturer_id", manf_id); 638 qdev_prop_set_uint8(dev, "chip_id", chip_id); 639 if (blk) { 640 qdev_prop_set_drive(dev, "drive", blk, &error_fatal); 641 } 642 643 qdev_init_nofail(dev); 644 return dev; 645 } 646 647 type_init(nand_register_types) 648 649 #else 650 651 /* Program a single page */ 652 static void glue(nand_blk_write_, PAGE_SIZE)(NANDFlashState *s) 653 { 654 uint64_t off, page, sector, soff; 655 uint8_t iobuf[(PAGE_SECTORS + 2) * 0x200]; 656 if (PAGE(s->addr) >= s->pages) 657 return; 658 659 if (!s->blk) { 660 mem_and(s->storage + PAGE_START(s->addr) + (s->addr & PAGE_MASK) + 661 s->offset, s->io, s->iolen); 662 } else if (s->mem_oob) { 663 sector = SECTOR(s->addr); 664 off = (s->addr & PAGE_MASK) + s->offset; 665 soff = SECTOR_OFFSET(s->addr); 666 if (blk_read(s->blk, sector, iobuf, PAGE_SECTORS) < 0) { 667 printf("%s: read error in sector %" PRIu64 "\n", __func__, sector); 668 return; 669 } 670 671 mem_and(iobuf + (soff | off), s->io, MIN(s->iolen, PAGE_SIZE - off)); 672 if (off + s->iolen > PAGE_SIZE) { 673 page = PAGE(s->addr); 674 mem_and(s->storage + (page << OOB_SHIFT), s->io + PAGE_SIZE - off, 675 MIN(OOB_SIZE, off + s->iolen - PAGE_SIZE)); 676 } 677 678 if (blk_write(s->blk, sector, iobuf, PAGE_SECTORS) < 0) { 679 printf("%s: write error in sector %" PRIu64 "\n", __func__, sector); 680 } 681 } else { 682 off = PAGE_START(s->addr) + (s->addr & PAGE_MASK) + s->offset; 683 sector = off >> 9; 684 soff = off & 0x1ff; 685 if (blk_read(s->blk, sector, iobuf, PAGE_SECTORS + 2) < 0) { 686 printf("%s: read error in sector %" PRIu64 "\n", __func__, sector); 687 return; 688 } 689 690 mem_and(iobuf + soff, s->io, s->iolen); 691 692 if (blk_write(s->blk, sector, iobuf, PAGE_SECTORS + 2) < 0) { 693 printf("%s: write error in sector %" PRIu64 "\n", __func__, sector); 694 } 695 } 696 s->offset = 0; 697 } 698 699 /* Erase a single block */ 700 static void glue(nand_blk_erase_, PAGE_SIZE)(NANDFlashState *s) 701 { 702 uint64_t i, page, addr; 703 uint8_t iobuf[0x200] = { [0 ... 0x1ff] = 0xff, }; 704 addr = s->addr & ~((1 << (ADDR_SHIFT + s->erase_shift)) - 1); 705 706 if (PAGE(addr) >= s->pages) { 707 return; 708 } 709 710 if (!s->blk) { 711 memset(s->storage + PAGE_START(addr), 712 0xff, (PAGE_SIZE + OOB_SIZE) << s->erase_shift); 713 } else if (s->mem_oob) { 714 memset(s->storage + (PAGE(addr) << OOB_SHIFT), 715 0xff, OOB_SIZE << s->erase_shift); 716 i = SECTOR(addr); 717 page = SECTOR(addr + (1 << (ADDR_SHIFT + s->erase_shift))); 718 for (; i < page; i ++) 719 if (blk_write(s->blk, i, iobuf, 1) < 0) { 720 printf("%s: write error in sector %" PRIu64 "\n", __func__, i); 721 } 722 } else { 723 addr = PAGE_START(addr); 724 page = addr >> 9; 725 if (blk_read(s->blk, page, iobuf, 1) < 0) { 726 printf("%s: read error in sector %" PRIu64 "\n", __func__, page); 727 } 728 memset(iobuf + (addr & 0x1ff), 0xff, (~addr & 0x1ff) + 1); 729 if (blk_write(s->blk, page, iobuf, 1) < 0) { 730 printf("%s: write error in sector %" PRIu64 "\n", __func__, page); 731 } 732 733 memset(iobuf, 0xff, 0x200); 734 i = (addr & ~0x1ff) + 0x200; 735 for (addr += ((PAGE_SIZE + OOB_SIZE) << s->erase_shift) - 0x200; 736 i < addr; i += 0x200) { 737 if (blk_write(s->blk, i >> 9, iobuf, 1) < 0) { 738 printf("%s: write error in sector %" PRIu64 "\n", 739 __func__, i >> 9); 740 } 741 } 742 743 page = i >> 9; 744 if (blk_read(s->blk, page, iobuf, 1) < 0) { 745 printf("%s: read error in sector %" PRIu64 "\n", __func__, page); 746 } 747 memset(iobuf, 0xff, ((addr - 1) & 0x1ff) + 1); 748 if (blk_write(s->blk, page, iobuf, 1) < 0) { 749 printf("%s: write error in sector %" PRIu64 "\n", __func__, page); 750 } 751 } 752 } 753 754 static void glue(nand_blk_load_, PAGE_SIZE)(NANDFlashState *s, 755 uint64_t addr, int offset) 756 { 757 if (PAGE(addr) >= s->pages) { 758 return; 759 } 760 761 if (s->blk) { 762 if (s->mem_oob) { 763 if (blk_read(s->blk, SECTOR(addr), s->io, PAGE_SECTORS) < 0) { 764 printf("%s: read error in sector %" PRIu64 "\n", 765 __func__, SECTOR(addr)); 766 } 767 memcpy(s->io + SECTOR_OFFSET(s->addr) + PAGE_SIZE, 768 s->storage + (PAGE(s->addr) << OOB_SHIFT), 769 OOB_SIZE); 770 s->ioaddr = s->io + SECTOR_OFFSET(s->addr) + offset; 771 } else { 772 if (blk_read(s->blk, PAGE_START(addr) >> 9, 773 s->io, (PAGE_SECTORS + 2)) < 0) { 774 printf("%s: read error in sector %" PRIu64 "\n", 775 __func__, PAGE_START(addr) >> 9); 776 } 777 s->ioaddr = s->io + (PAGE_START(addr) & 0x1ff) + offset; 778 } 779 } else { 780 memcpy(s->io, s->storage + PAGE_START(s->addr) + 781 offset, PAGE_SIZE + OOB_SIZE - offset); 782 s->ioaddr = s->io; 783 } 784 } 785 786 static void glue(nand_init_, PAGE_SIZE)(NANDFlashState *s) 787 { 788 s->oob_shift = PAGE_SHIFT - 5; 789 s->pages = s->size >> PAGE_SHIFT; 790 s->addr_shift = ADDR_SHIFT; 791 792 s->blk_erase = glue(nand_blk_erase_, PAGE_SIZE); 793 s->blk_write = glue(nand_blk_write_, PAGE_SIZE); 794 s->blk_load = glue(nand_blk_load_, PAGE_SIZE); 795 } 796 797 # undef PAGE_SIZE 798 # undef PAGE_SHIFT 799 # undef PAGE_SECTORS 800 # undef ADDR_SHIFT 801 #endif /* NAND_IO */ 802