hw/nand.c

   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  * This code is licensed under the GNU GPL v2.
  10  */
  11
  12 #ifndef NAND_IO
  13
  14 # include "hw.h"
  15 # include "flash.h"
  16 # include "blockdev.h"
  17 /* FIXME: Pass block device as an argument.  */
  18
  19 # define NAND_CMD_READ0         0x00
  20 # define NAND_CMD_READ1         0x01
  21 # define NAND_CMD_READ2         0x50
  22 # define NAND_CMD_LPREAD2       0x30
  23 # define NAND_CMD_NOSERIALREAD2 0x35
  24 # define NAND_CMD_RANDOMREAD1   0x05
  25 # define NAND_CMD_RANDOMREAD2   0xe0
  26 # define NAND_CMD_READID        0x90
  27 # define NAND_CMD_RESET         0xff
  28 # define NAND_CMD_PAGEPROGRAM1  0x80
  29 # define NAND_CMD_PAGEPROGRAM2  0x10
  30 # define NAND_CMD_CACHEPROGRAM2 0x15
  31 # define NAND_CMD_BLOCKERASE1   0x60
  32 # define NAND_CMD_BLOCKERASE2   0xd0
  33 # define NAND_CMD_READSTATUS    0x70
  34 # define NAND_CMD_COPYBACKPRG1  0x85
  35
  36 # define NAND_IOSTATUS_ERROR    (1 << 0)
  37 # define NAND_IOSTATUS_PLANE0   (1 << 1)
  38 # define NAND_IOSTATUS_PLANE1   (1 << 2)
  39 # define NAND_IOSTATUS_PLANE2   (1 << 3)
  40 # define NAND_IOSTATUS_PLANE3   (1 << 4)
  41 # define NAND_IOSTATUS_BUSY     (1 << 6)
  42 # define NAND_IOSTATUS_UNPROTCT (1 << 7)
  43
  44 # define MAX_PAGE               0x800
  45 # define MAX_OOB                0x40
  46
  47 struct NANDFlashState {
  48     uint8_t manf_id, chip_id;
  49     int size, pages;
  50     int page_shift, oob_shift, erase_shift, addr_shift;
  51     uint8_t *storage;
  52     BlockDriverState *bdrv;
  53     int mem_oob;
  54
  55     int cle, ale, ce, wp, gnd;
  56
  57     uint8_t io[MAX_PAGE + MAX_OOB + 0x400];
  58     uint8_t *ioaddr;
  59     int iolen;
  60
  61     uint32_t cmd, addr;
  62     int addrlen;
  63     int status;
  64     int offset;
  65
  66     void (*blk_write)(NANDFlashState *s);
  67     void (*blk_erase)(NANDFlashState *s);
  68     void (*blk_load)(NANDFlashState *s, uint32_t addr, int offset);
  69 };
  70
  71 # define NAND_NO_AUTOINCR       0x00000001
  72 # define NAND_BUSWIDTH_16       0x00000002
  73 # define NAND_NO_PADDING        0x00000004
  74 # define NAND_CACHEPRG          0x00000008
  75 # define NAND_COPYBACK          0x00000010
  76 # define NAND_IS_AND            0x00000020
  77 # define NAND_4PAGE_ARRAY       0x00000040
  78 # define NAND_NO_READRDY        0x00000100
  79 # define NAND_SAMSUNG_LP        (NAND_NO_PADDING | NAND_COPYBACK)
  80
  81 # define NAND_IO
  82
  83 # define PAGE(addr)             ((addr) >> ADDR_SHIFT)
  84 # define PAGE_START(page)       (PAGE(page) * (PAGE_SIZE + OOB_SIZE))
  85 # define PAGE_MASK              ((1 << ADDR_SHIFT) - 1)
  86 # define OOB_SHIFT              (PAGE_SHIFT - 5)
  87 # define OOB_SIZE               (1 << OOB_SHIFT)
  88 # define SECTOR(addr)           ((addr) >> (9 + ADDR_SHIFT - PAGE_SHIFT))
  89 # define SECTOR_OFFSET(addr)    ((addr) & ((511 >> PAGE_SHIFT) << 8))
  90
  91 # define PAGE_SIZE              256
  92 # define PAGE_SHIFT             8
  93 # define PAGE_SECTORS           1
  94 # define ADDR_SHIFT             8
  95 # include "nand.c"
  96 # define PAGE_SIZE              512
  97 # define PAGE_SHIFT             9
  98 # define PAGE_SECTORS           1
  99 # define ADDR_SHIFT             8
 100 # include "nand.c"
 101 # define PAGE_SIZE              2048
 102 # define PAGE_SHIFT             11
 103 # define PAGE_SECTORS           4
 104 # define ADDR_SHIFT             16
 105 # include "nand.c"
 106
 107 /* Information based on Linux drivers/mtd/nand/nand_ids.c */
 108 static const struct {
 109     int size;
 110     int width;
 111     int page_shift;
 112     int erase_shift;
 113     uint32_t options;
 114 } nand_flash_ids[0x100] = {
 115     [0 ... 0xff] = { 0 },
 116
 117     [0x6e] = { 1,       8,      8, 4, 0 },
 118     [0x64] = { 2,       8,      8, 4, 0 },
 119     [0x6b] = { 4,       8,      9, 4, 0 },
 120     [0xe8] = { 1,       8,      8, 4, 0 },
 121     [0xec] = { 1,       8,      8, 4, 0 },
 122     [0xea] = { 2,       8,      8, 4, 0 },
 123     [0xd5] = { 4,       8,      9, 4, 0 },
 124     [0xe3] = { 4,       8,      9, 4, 0 },
 125     [0xe5] = { 4,       8,      9, 4, 0 },
 126     [0xd6] = { 8,       8,      9, 4, 0 },
 127
 128     [0x39] = { 8,       8,      9, 4, 0 },
 129     [0xe6] = { 8,       8,      9, 4, 0 },
 130     [0x49] = { 8,       16,     9, 4, NAND_BUSWIDTH_16 },
 131     [0x59] = { 8,       16,     9, 4, NAND_BUSWIDTH_16 },
 132
 133     [0x33] = { 16,      8,      9, 5, 0 },
 134     [0x73] = { 16,      8,      9, 5, 0 },
 135     [0x43] = { 16,      16,     9, 5, NAND_BUSWIDTH_16 },
 136     [0x53] = { 16,      16,     9, 5, NAND_BUSWIDTH_16 },
 137
 138     [0x35] = { 32,      8,      9, 5, 0 },
 139     [0x75] = { 32,      8,      9, 5, 0 },
 140     [0x45] = { 32,      16,     9, 5, NAND_BUSWIDTH_16 },
 141     [0x55] = { 32,      16,     9, 5, NAND_BUSWIDTH_16 },
 142
 143     [0x36] = { 64,      8,      9, 5, 0 },
 144     [0x76] = { 64,      8,      9, 5, 0 },
 145     [0x46] = { 64,      16,     9, 5, NAND_BUSWIDTH_16 },
 146     [0x56] = { 64,      16,     9, 5, NAND_BUSWIDTH_16 },
 147
 148     [0x78] = { 128,     8,      9, 5, 0 },
 149     [0x39] = { 128,     8,      9, 5, 0 },
 150     [0x79] = { 128,     8,      9, 5, 0 },
 151     [0x72] = { 128,     16,     9, 5, NAND_BUSWIDTH_16 },
 152     [0x49] = { 128,     16,     9, 5, NAND_BUSWIDTH_16 },
 153     [0x74] = { 128,     16,     9, 5, NAND_BUSWIDTH_16 },
 154     [0x59] = { 128,     16,     9, 5, NAND_BUSWIDTH_16 },
 155
 156     [0x71] = { 256,     8,      9, 5, 0 },
 157
 158     /*
 159      * These are the new chips with large page size. The pagesize and the
 160      * erasesize is determined from the extended id bytes
 161      */
 162 # define LP_OPTIONS     (NAND_SAMSUNG_LP | NAND_NO_READRDY | NAND_NO_AUTOINCR)
 163 # define LP_OPTIONS16   (LP_OPTIONS | NAND_BUSWIDTH_16)
 164
 165     /* 512 Megabit */
 166     [0xa2] = { 64,      8,      0, 0, LP_OPTIONS },
 167     [0xf2] = { 64,      8,      0, 0, LP_OPTIONS },
 168     [0xb2] = { 64,      16,     0, 0, LP_OPTIONS16 },
 169     [0xc2] = { 64,      16,     0, 0, LP_OPTIONS16 },
 170
 171     /* 1 Gigabit */
 172     [0xa1] = { 128,     8,      0, 0, LP_OPTIONS },
 173     [0xf1] = { 128,     8,      0, 0, LP_OPTIONS },
 174     [0xb1] = { 128,     16,     0, 0, LP_OPTIONS16 },
 175     [0xc1] = { 128,     16,     0, 0, LP_OPTIONS16 },
 176
 177     /* 2 Gigabit */
 178     [0xaa] = { 256,     8,      0, 0, LP_OPTIONS },
 179     [0xda] = { 256,     8,      0, 0, LP_OPTIONS },
 180     [0xba] = { 256,     16,     0, 0, LP_OPTIONS16 },
 181     [0xca] = { 256,     16,     0, 0, LP_OPTIONS16 },
 182
 183     /* 4 Gigabit */
 184     [0xac] = { 512,     8,      0, 0, LP_OPTIONS },
 185     [0xdc] = { 512,     8,      0, 0, LP_OPTIONS },
 186     [0xbc] = { 512,     16,     0, 0, LP_OPTIONS16 },
 187     [0xcc] = { 512,     16,     0, 0, LP_OPTIONS16 },
 188
 189     /* 8 Gigabit */
 190     [0xa3] = { 1024,    8,      0, 0, LP_OPTIONS },
 191     [0xd3] = { 1024,    8,      0, 0, LP_OPTIONS },
 192     [0xb3] = { 1024,    16,     0, 0, LP_OPTIONS16 },
 193     [0xc3] = { 1024,    16,     0, 0, LP_OPTIONS16 },
 194
 195     /* 16 Gigabit */
 196     [0xa5] = { 2048,    8,      0, 0, LP_OPTIONS },
 197     [0xd5] = { 2048,    8,      0, 0, LP_OPTIONS },
 198     [0xb5] = { 2048,    16,     0, 0, LP_OPTIONS16 },
 199     [0xc5] = { 2048,    16,     0, 0, LP_OPTIONS16 },
 200 };
 201
 202 static void nand_reset(NANDFlashState *s)
 203 {
 204     s->cmd = NAND_CMD_READ0;
 205     s->addr = 0;
 206     s->addrlen = 0;
 207     s->iolen = 0;
 208     s->offset = 0;
 209     s->status &= NAND_IOSTATUS_UNPROTCT;
 210 }
 211
 212 static void nand_command(NANDFlashState *s)
 213 {
 214     unsigned int offset;
 215     switch (s->cmd) {
 216     case NAND_CMD_READ0:
 217         s->iolen = 0;
 218         break;
 219
 220     case NAND_CMD_READID:
 221         s->io[0] = s->manf_id;
 222         s->io[1] = s->chip_id;
 223         s->io[2] = 'Q';         /* Don't-care byte (often 0xa5) */
 224         if (nand_flash_ids[s->chip_id].options & NAND_SAMSUNG_LP)
 225             s->io[3] = 0x15;    /* Page Size, Block Size, Spare Size.. */
 226         else
 227             s->io[3] = 0xc0;    /* Multi-plane */
 228         s->ioaddr = s->io;
 229         s->iolen = 4;
 230         break;
 231
 232     case NAND_CMD_RANDOMREAD2:
 233     case NAND_CMD_NOSERIALREAD2:
 234         if (!(nand_flash_ids[s->chip_id].options & NAND_SAMSUNG_LP))
 235             break;
 236         offset = s->addr & ((1 << s->addr_shift) - 1);
 237         s->blk_load(s, s->addr, offset);
 238         if (s->gnd)
 239             s->iolen = (1 << s->page_shift) - offset;
 240         else
 241             s->iolen = (1 << s->page_shift) + (1 << s->oob_shift) - offset;
 242         break;
 243
 244     case NAND_CMD_RESET:
 245         nand_reset(s);
 246         break;
 247
 248     case NAND_CMD_PAGEPROGRAM1:
 249         s->ioaddr = s->io;
 250         s->iolen = 0;
 251         break;
 252
 253     case NAND_CMD_PAGEPROGRAM2:
 254         if (s->wp) {
 255             s->blk_write(s);
 256         }
 257         break;
 258
 259     case NAND_CMD_BLOCKERASE1:
 260         break;
 261
 262     case NAND_CMD_BLOCKERASE2:
 263         if (nand_flash_ids[s->chip_id].options & NAND_SAMSUNG_LP)
 264             s->addr <<= 16;
 265         else
 266             s->addr <<= 8;
 267
 268         if (s->wp) {
 269             s->blk_erase(s);
 270         }
 271         break;
 272
 273     case NAND_CMD_READSTATUS:
 274         s->io[0] = s->status;
 275         s->ioaddr = s->io;
 276         s->iolen = 1;
 277         break;
 278
 279     default:
 280         printf("%s: Unknown NAND command 0x%02x\n", __FUNCTION__, s->cmd);
 281     }
 282 }
 283
 284 static void nand_save(QEMUFile *f, void *opaque)
 285 {
 286     NANDFlashState *s = (NANDFlashState *) opaque;
 287     qemu_put_byte(f, s->cle);
 288     qemu_put_byte(f, s->ale);
 289     qemu_put_byte(f, s->ce);
 290     qemu_put_byte(f, s->wp);
 291     qemu_put_byte(f, s->gnd);
 292     qemu_put_buffer(f, s->io, sizeof(s->io));
 293     qemu_put_be32(f, s->ioaddr - s->io);
 294     qemu_put_be32(f, s->iolen);
 295
 296     qemu_put_be32s(f, &s->cmd);
 297     qemu_put_be32s(f, &s->addr);
 298     qemu_put_be32(f, s->addrlen);
 299     qemu_put_be32(f, s->status);
 300     qemu_put_be32(f, s->offset);
 301     /* XXX: do we want to save s->storage too? */
 302 }
 303
 304 static int nand_load(QEMUFile *f, void *opaque, int version_id)
 305 {
 306     NANDFlashState *s = (NANDFlashState *) opaque;
 307     s->cle = qemu_get_byte(f);
 308     s->ale = qemu_get_byte(f);
 309     s->ce = qemu_get_byte(f);
 310     s->wp = qemu_get_byte(f);
 311     s->gnd = qemu_get_byte(f);
 312     qemu_get_buffer(f, s->io, sizeof(s->io));
 313     s->ioaddr = s->io + qemu_get_be32(f);
 314     s->iolen = qemu_get_be32(f);
 315     if (s->ioaddr >= s->io + sizeof(s->io) || s->ioaddr < s->io)
 316         return -EINVAL;
 317
 318     qemu_get_be32s(f, &s->cmd);
 319     qemu_get_be32s(f, &s->addr);
 320     s->addrlen = qemu_get_be32(f);
 321     s->status = qemu_get_be32(f);
 322     s->offset = qemu_get_be32(f);
 323     return 0;
 324 }
 325
 326 /*
 327  * Chip inputs are CLE, ALE, CE, WP, GND and eight I/O pins.  Chip
 328  * outputs are R/B and eight I/O pins.
 329  *
 330  * CE, WP and R/B are active low.
 331  */
 332 void nand_setpins(NANDFlashState *s,
 333                 int cle, int ale, int ce, int wp, int gnd)
 334 {
 335     s->cle = cle;
 336     s->ale = ale;
 337     s->ce = ce;
 338     s->wp = wp;
 339     s->gnd = gnd;
 340     if (wp)
 341         s->status |= NAND_IOSTATUS_UNPROTCT;
 342     else
 343         s->status &= ~NAND_IOSTATUS_UNPROTCT;
 344 }
 345
 346 void nand_getpins(NANDFlashState *s, int *rb)
 347 {
 348     *rb = 1;
 349 }
 350
 351 void nand_setio(NANDFlashState *s, uint8_t value)
 352 {
 353     if (!s->ce && s->cle) {
 354         if (nand_flash_ids[s->chip_id].options & NAND_SAMSUNG_LP) {
 355             if (s->cmd == NAND_CMD_READ0 && value == NAND_CMD_LPREAD2)
 356                 return;
 357             if (value == NAND_CMD_RANDOMREAD1) {
 358                 s->addr &= ~((1 << s->addr_shift) - 1);
 359                 s->addrlen = 0;
 360                 return;
 361             }
 362         }
 363         if (value == NAND_CMD_READ0)
 364             s->offset = 0;
 365         else if (value == NAND_CMD_READ1) {
 366             s->offset = 0x100;
 367             value = NAND_CMD_READ0;
 368         }
 369         else if (value == NAND_CMD_READ2) {
 370             s->offset = 1 << s->page_shift;
 371             value = NAND_CMD_READ0;
 372         }
 373
 374         s->cmd = value;
 375
 376         if (s->cmd == NAND_CMD_READSTATUS ||
 377                 s->cmd == NAND_CMD_PAGEPROGRAM2 ||
 378                 s->cmd == NAND_CMD_BLOCKERASE1 ||
 379                 s->cmd == NAND_CMD_BLOCKERASE2 ||
 380                 s->cmd == NAND_CMD_NOSERIALREAD2 ||
 381                 s->cmd == NAND_CMD_RANDOMREAD2 ||
 382                 s->cmd == NAND_CMD_RESET)
 383             nand_command(s);
 384
 385         if (s->cmd != NAND_CMD_RANDOMREAD2) {
 386             s->addrlen = 0;
 387         }
 388     }
 389
 390     if (s->ale) {
 391         unsigned int shift = s->addrlen * 8;
 392         unsigned int mask = ~(0xff << shift);
 393         unsigned int v = value << shift;
 394
 395         s->addr = (s->addr & mask) | v;
 396         s->addrlen ++;
 397
 398         if (s->addrlen == 1 && s->cmd == NAND_CMD_READID)
 399             nand_command(s);
 400
 401         if (!(nand_flash_ids[s->chip_id].options & NAND_SAMSUNG_LP) &&
 402                 s->addrlen == 3 && (
 403                     s->cmd == NAND_CMD_READ0 ||
 404                     s->cmd == NAND_CMD_PAGEPROGRAM1))
 405             nand_command(s);
 406         if ((nand_flash_ids[s->chip_id].options & NAND_SAMSUNG_LP) &&
 407                s->addrlen == 4 && (
 408                     s->cmd == NAND_CMD_READ0 ||
 409                     s->cmd == NAND_CMD_PAGEPROGRAM1))
 410             nand_command(s);
 411     }
 412
 413     if (!s->cle && !s->ale && s->cmd == NAND_CMD_PAGEPROGRAM1) {
 414         if (s->iolen < (1 << s->page_shift) + (1 << s->oob_shift))
 415             s->io[s->iolen ++] = value;
 416     } else if (!s->cle && !s->ale && s->cmd == NAND_CMD_COPYBACKPRG1) {
 417         if ((s->addr & ((1 << s->addr_shift) - 1)) <
 418                 (1 << s->page_shift) + (1 << s->oob_shift)) {
 419             s->io[s->iolen + (s->addr & ((1 << s->addr_shift) - 1))] = value;
 420             s->addr ++;
 421         }
 422     }
 423 }
 424
 425 uint8_t nand_getio(NANDFlashState *s)
 426 {
 427     int offset;
 428
 429     /* Allow sequential reading */
 430     if (!s->iolen && s->cmd == NAND_CMD_READ0) {
 431         offset = (s->addr & ((1 << s->addr_shift) - 1)) + s->offset;
 432         s->offset = 0;
 433
 434         s->blk_load(s, s->addr, offset);
 435         if (s->gnd)
 436             s->iolen = (1 << s->page_shift) - offset;
 437         else
 438             s->iolen = (1 << s->page_shift) + (1 << s->oob_shift) - offset;
 439     }
 440
 441     if (s->ce || s->iolen <= 0)
 442         return 0;
 443
 444     s->iolen --;
 445     s->addr++;
 446     return *(s->ioaddr ++);
 447 }
 448
 449 NANDFlashState *nand_init(int manf_id, int chip_id)
 450 {
 451     int pagesize;
 452     NANDFlashState *s;
 453     DriveInfo *dinfo;
 454
 455     if (nand_flash_ids[chip_id].size == 0) {
 456         hw_error("%s: Unsupported NAND chip ID.\n", __FUNCTION__);
 457     }
 458
 459     s = (NANDFlashState *) qemu_mallocz(sizeof(NANDFlashState));
 460     dinfo = drive_get(IF_MTD, 0, 0);
 461     if (dinfo)
 462         s->bdrv = dinfo->bdrv;
 463     s->manf_id = manf_id;
 464     s->chip_id = chip_id;
 465     s->size = nand_flash_ids[s->chip_id].size << 20;
 466     if (nand_flash_ids[s->chip_id].options & NAND_SAMSUNG_LP) {
 467         s->page_shift = 11;
 468         s->erase_shift = 6;
 469     } else {
 470         s->page_shift = nand_flash_ids[s->chip_id].page_shift;
 471         s->erase_shift = nand_flash_ids[s->chip_id].erase_shift;
 472     }
 473
 474     switch (1 << s->page_shift) {
 475     case 256:
 476         nand_init_256(s);
 477         break;
 478     case 512:
 479         nand_init_512(s);
 480         break;
 481     case 2048:
 482         nand_init_2048(s);
 483         break;
 484     default:
 485         hw_error("%s: Unsupported NAND block size.\n", __FUNCTION__);
 486     }
 487
 488     pagesize = 1 << s->oob_shift;
 489     s->mem_oob = 1;
 490     if (s->bdrv && bdrv_getlength(s->bdrv) >=
 491                     (s->pages << s->page_shift) + (s->pages << s->oob_shift)) {
 492         pagesize = 0;
 493         s->mem_oob = 0;
 494     }
 495
 496     if (!s->bdrv)
 497         pagesize += 1 << s->page_shift;
 498     if (pagesize)
 499         s->storage = (uint8_t *) memset(qemu_malloc(s->pages * pagesize),
 500                         0xff, s->pages * pagesize);
 501     /* Give s->ioaddr a sane value in case we save state before it
 502        is used.  */
 503     s->ioaddr = s->io;
 504
 505     register_savevm(NULL, "nand", -1, 0, nand_save, nand_load, s);
 506
 507     return s;
 508 }
 509
 510 void nand_done(NANDFlashState *s)
 511 {
 512     if (s->bdrv) {
 513         bdrv_close(s->bdrv);
 514         bdrv_delete(s->bdrv);
 515     }
 516
 517     if (!s->bdrv || s->mem_oob)
 518         qemu_free(s->storage);
 519
 520     qemu_free(s);
 521 }
 522
 523 #else
 524
 525 /* Program a single page */
 526 static void glue(nand_blk_write_, PAGE_SIZE)(NANDFlashState *s)
 527 {
 528     uint32_t off, page, sector, soff;
 529     uint8_t iobuf[(PAGE_SECTORS + 2) * 0x200];
 530     if (PAGE(s->addr) >= s->pages)
 531         return;
 532
 533     if (!s->bdrv) {
 534         memcpy(s->storage + PAGE_START(s->addr) + (s->addr & PAGE_MASK) +
 535                         s->offset, s->io, s->iolen);
 536     } else if (s->mem_oob) {
 537         sector = SECTOR(s->addr);
 538         off = (s->addr & PAGE_MASK) + s->offset;
 539         soff = SECTOR_OFFSET(s->addr);
 540         if (bdrv_read(s->bdrv, sector, iobuf, PAGE_SECTORS) == -1) {
 541             printf("%s: read error in sector %i\n", __FUNCTION__, sector);
 542             return;
 543         }
 544
 545         memcpy(iobuf + (soff | off), s->io, MIN(s->iolen, PAGE_SIZE - off));
 546         if (off + s->iolen > PAGE_SIZE) {
 547             page = PAGE(s->addr);
 548             memcpy(s->storage + (page << OOB_SHIFT), s->io + PAGE_SIZE - off,
 549                             MIN(OOB_SIZE, off + s->iolen - PAGE_SIZE));
 550         }
 551
 552         if (bdrv_write(s->bdrv, sector, iobuf, PAGE_SECTORS) == -1)
 553             printf("%s: write error in sector %i\n", __FUNCTION__, sector);
 554     } else {
 555         off = PAGE_START(s->addr) + (s->addr & PAGE_MASK) + s->offset;
 556         sector = off >> 9;
 557         soff = off & 0x1ff;
 558         if (bdrv_read(s->bdrv, sector, iobuf, PAGE_SECTORS + 2) == -1) {
 559             printf("%s: read error in sector %i\n", __FUNCTION__, sector);
 560             return;
 561         }
 562
 563         memcpy(iobuf + soff, s->io, s->iolen);
 564
 565         if (bdrv_write(s->bdrv, sector, iobuf, PAGE_SECTORS + 2) == -1)
 566             printf("%s: write error in sector %i\n", __FUNCTION__, sector);
 567     }
 568     s->offset = 0;
 569 }
 570
 571 /* Erase a single block */
 572 static void glue(nand_blk_erase_, PAGE_SIZE)(NANDFlashState *s)
 573 {
 574     uint32_t i, page, addr;
 575     uint8_t iobuf[0x200] = { [0 ... 0x1ff] = 0xff, };
 576     addr = s->addr & ~((1 << (ADDR_SHIFT + s->erase_shift)) - 1);
 577
 578     if (PAGE(addr) >= s->pages)
 579         return;
 580
 581     if (!s->bdrv) {
 582         memset(s->storage + PAGE_START(addr),
 583                         0xff, (PAGE_SIZE + OOB_SIZE) << s->erase_shift);
 584     } else if (s->mem_oob) {
 585         memset(s->storage + (PAGE(addr) << OOB_SHIFT),
 586                         0xff, OOB_SIZE << s->erase_shift);
 587         i = SECTOR(addr);
 588         page = SECTOR(addr + (ADDR_SHIFT + s->erase_shift));
 589         for (; i < page; i ++)
 590             if (bdrv_write(s->bdrv, i, iobuf, 1) == -1)
 591                 printf("%s: write error in sector %i\n", __FUNCTION__, i);
 592     } else {
 593         addr = PAGE_START(addr);
 594         page = addr >> 9;
 595         if (bdrv_read(s->bdrv, page, iobuf, 1) == -1)
 596             printf("%s: read error in sector %i\n", __FUNCTION__, page);
 597         memset(iobuf + (addr & 0x1ff), 0xff, (~addr & 0x1ff) + 1);
 598         if (bdrv_write(s->bdrv, page, iobuf, 1) == -1)
 599             printf("%s: write error in sector %i\n", __FUNCTION__, page);
 600
 601         memset(iobuf, 0xff, 0x200);
 602         i = (addr & ~0x1ff) + 0x200;
 603         for (addr += ((PAGE_SIZE + OOB_SIZE) << s->erase_shift) - 0x200;
 604                         i < addr; i += 0x200)
 605             if (bdrv_write(s->bdrv, i >> 9, iobuf, 1) == -1)
 606                 printf("%s: write error in sector %i\n", __FUNCTION__, i >> 9);
 607
 608         page = i >> 9;
 609         if (bdrv_read(s->bdrv, page, iobuf, 1) == -1)
 610             printf("%s: read error in sector %i\n", __FUNCTION__, page);
 611         memset(iobuf, 0xff, ((addr - 1) & 0x1ff) + 1);
 612         if (bdrv_write(s->bdrv, page, iobuf, 1) == -1)
 613             printf("%s: write error in sector %i\n", __FUNCTION__, page);
 614     }
 615 }
 616
 617 static void glue(nand_blk_load_, PAGE_SIZE)(NANDFlashState *s,
 618                 uint32_t addr, int offset)
 619 {
 620     if (PAGE(addr) >= s->pages)
 621         return;
 622
 623     if (s->bdrv) {
 624         if (s->mem_oob) {
 625             if (bdrv_read(s->bdrv, SECTOR(addr), s->io, PAGE_SECTORS) == -1)
 626                 printf("%s: read error in sector %i\n",
 627                                 __FUNCTION__, SECTOR(addr));
 628             memcpy(s->io + SECTOR_OFFSET(s->addr) + PAGE_SIZE,
 629                             s->storage + (PAGE(s->addr) << OOB_SHIFT),
 630                             OOB_SIZE);
 631             s->ioaddr = s->io + SECTOR_OFFSET(s->addr) + offset;
 632         } else {
 633             if (bdrv_read(s->bdrv, PAGE_START(addr) >> 9,
 634                                     s->io, (PAGE_SECTORS + 2)) == -1)
 635                 printf("%s: read error in sector %i\n",
 636                                 __FUNCTION__, PAGE_START(addr) >> 9);
 637             s->ioaddr = s->io + (PAGE_START(addr) & 0x1ff) + offset;
 638         }
 639     } else {
 640         memcpy(s->io, s->storage + PAGE_START(s->addr) +
 641                         offset, PAGE_SIZE + OOB_SIZE - offset);
 642         s->ioaddr = s->io;
 643     }
 644 }
 645
 646 static void glue(nand_init_, PAGE_SIZE)(NANDFlashState *s)
 647 {
 648     s->oob_shift = PAGE_SHIFT - 5;
 649     s->pages = s->size >> PAGE_SHIFT;
 650     s->addr_shift = ADDR_SHIFT;
 651
 652     s->blk_erase = glue(nand_blk_erase_, PAGE_SIZE);
 653     s->blk_write = glue(nand_blk_write_, PAGE_SIZE);
 654     s->blk_load = glue(nand_blk_load_, PAGE_SIZE);
 655 }
 656
 657 # undef PAGE_SIZE
 658 # undef PAGE_SHIFT
 659 # undef PAGE_SECTORS
 660 # undef ADDR_SHIFT
 661 #endif  /* NAND_IO */