hw/block/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  * 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/qdev-properties.h"
  24 #include "hw/block/flash.h"
  25 #include "sysemu/block-backend.h"
  26 #include "migration/vmstate.h"
  27 #include "qapi/error.h"
  28 #include "qemu/error-report.h"
  29 #include "qemu/module.h"
  30
  31 # define NAND_CMD_READ0         0x00
  32 # define NAND_CMD_READ1         0x01
  33 # define NAND_CMD_READ2         0x50
  34 # define NAND_CMD_LPREAD2       0x30
  35 # define NAND_CMD_NOSERIALREAD2 0x35
  36 # define NAND_CMD_RANDOMREAD1   0x05
  37 # define NAND_CMD_RANDOMREAD2   0xe0
  38 # define NAND_CMD_READID        0x90
  39 # define NAND_CMD_RESET         0xff
  40 # define NAND_CMD_PAGEPROGRAM1  0x80
  41 # define NAND_CMD_PAGEPROGRAM2  0x10
  42 # define NAND_CMD_CACHEPROGRAM2 0x15
  43 # define NAND_CMD_BLOCKERASE1   0x60
  44 # define NAND_CMD_BLOCKERASE2   0xd0
  45 # define NAND_CMD_READSTATUS    0x70
  46 # define NAND_CMD_COPYBACKPRG1  0x85
  47
  48 # define NAND_IOSTATUS_ERROR    (1 << 0)
  49 # define NAND_IOSTATUS_PLANE0   (1 << 1)
  50 # define NAND_IOSTATUS_PLANE1   (1 << 2)
  51 # define NAND_IOSTATUS_PLANE2   (1 << 3)
  52 # define NAND_IOSTATUS_PLANE3   (1 << 4)
  53 # define NAND_IOSTATUS_READY    (1 << 6)
  54 # define NAND_IOSTATUS_UNPROTCT (1 << 7)
  55
  56 # define MAX_PAGE               0x800
  57 # define MAX_OOB                0x40
  58
  59 typedef struct NANDFlashState NANDFlashState;
  60 struct NANDFlashState {
  61     DeviceState parent_obj;
  62
  63     uint8_t manf_id, chip_id;
  64     uint8_t buswidth; /* in BYTES */
  65     int size, pages;
  66     int page_shift, oob_shift, erase_shift, addr_shift;
  67     uint8_t *storage;
  68     BlockBackend *blk;
  69     int mem_oob;
  70
  71     uint8_t cle, ale, ce, wp, gnd;
  72
  73     uint8_t io[MAX_PAGE + MAX_OOB + 0x400];
  74     uint8_t *ioaddr;
  75     int iolen;
  76
  77     uint32_t cmd;
  78     uint64_t addr;
  79     int addrlen;
  80     int status;
  81     int offset;
  82
  83     void (*blk_write)(NANDFlashState *s);
  84     void (*blk_erase)(NANDFlashState *s);
  85     void (*blk_load)(NANDFlashState *s, uint64_t addr, int offset);
  86
  87     uint32_t ioaddr_vmstate;
  88 };
  89
  90 #define TYPE_NAND "nand"
  91
  92 #define NAND(obj) \
  93     OBJECT_CHECK(NANDFlashState, (obj), TYPE_NAND)
  94
  95 static void mem_and(uint8_t *dest, const uint8_t *src, size_t n)
  96 {
  97     /* Like memcpy() but we logical-AND the data into the destination */
  98     int i;
  99     for (i = 0; i < n; i++) {
 100         dest[i] &= src[i];
 101     }
 102 }
 103
 104 # define NAND_NO_AUTOINCR       0x00000001
 105 # define NAND_BUSWIDTH_16       0x00000002
 106 # define NAND_NO_PADDING        0x00000004
 107 # define NAND_CACHEPRG          0x00000008
 108 # define NAND_COPYBACK          0x00000010
 109 # define NAND_IS_AND            0x00000020
 110 # define NAND_4PAGE_ARRAY       0x00000040
 111 # define NAND_NO_READRDY        0x00000100
 112 # define NAND_SAMSUNG_LP        (NAND_NO_PADDING | NAND_COPYBACK)
 113
 114 # define NAND_IO
 115
 116 # define PAGE(addr)             ((addr) >> ADDR_SHIFT)
 117 # define PAGE_START(page)       (PAGE(page) * (PAGE_SIZE + OOB_SIZE))
 118 # define PAGE_MASK              ((1 << ADDR_SHIFT) - 1)
 119 # define OOB_SHIFT              (PAGE_SHIFT - 5)
 120 # define OOB_SIZE               (1 << OOB_SHIFT)
 121 # define SECTOR(addr)           ((addr) >> (9 + ADDR_SHIFT - PAGE_SHIFT))
 122 # define SECTOR_OFFSET(addr)    ((addr) & ((511 >> PAGE_SHIFT) << 8))
 123
 124 # define PAGE_SIZE              256
 125 # define PAGE_SHIFT             8
 126 # define PAGE_SECTORS           1
 127 # define ADDR_SHIFT             8
 128 # include "nand.c"
 129 # define PAGE_SIZE              512
 130 # define PAGE_SHIFT             9
 131 # define PAGE_SECTORS           1
 132 # define ADDR_SHIFT             8
 133 # include "nand.c"
 134 # define PAGE_SIZE              2048
 135 # define PAGE_SHIFT             11
 136 # define PAGE_SECTORS           4
 137 # define ADDR_SHIFT             16
 138 # include "nand.c"
 139
 140 /* Information based on Linux drivers/mtd/nand/nand_ids.c */
 141 static const struct {
 142     int size;
 143     int width;
 144     int page_shift;
 145     int erase_shift;
 146     uint32_t options;
 147 } nand_flash_ids[0x100] = {
 148     [0 ... 0xff] = { 0 },
 149
 150     [0x6e] = { 1,       8,      8, 4, 0 },
 151     [0x64] = { 2,       8,      8, 4, 0 },
 152     [0x6b] = { 4,       8,      9, 4, 0 },
 153     [0xe8] = { 1,       8,      8, 4, 0 },
 154     [0xec] = { 1,       8,      8, 4, 0 },
 155     [0xea] = { 2,       8,      8, 4, 0 },
 156     [0xd5] = { 4,       8,      9, 4, 0 },
 157     [0xe3] = { 4,       8,      9, 4, 0 },
 158     [0xe5] = { 4,       8,      9, 4, 0 },
 159     [0xd6] = { 8,       8,      9, 4, 0 },
 160
 161     [0x39] = { 8,       8,      9, 4, 0 },
 162     [0xe6] = { 8,       8,      9, 4, 0 },
 163     [0x49] = { 8,       16,     9, 4, NAND_BUSWIDTH_16 },
 164     [0x59] = { 8,       16,     9, 4, NAND_BUSWIDTH_16 },
 165
 166     [0x33] = { 16,      8,      9, 5, 0 },
 167     [0x73] = { 16,      8,      9, 5, 0 },
 168     [0x43] = { 16,      16,     9, 5, NAND_BUSWIDTH_16 },
 169     [0x53] = { 16,      16,     9, 5, NAND_BUSWIDTH_16 },
 170
 171     [0x35] = { 32,      8,      9, 5, 0 },
 172     [0x75] = { 32,      8,      9, 5, 0 },
 173     [0x45] = { 32,      16,     9, 5, NAND_BUSWIDTH_16 },
 174     [0x55] = { 32,      16,     9, 5, NAND_BUSWIDTH_16 },
 175
 176     [0x36] = { 64,      8,      9, 5, 0 },
 177     [0x76] = { 64,      8,      9, 5, 0 },
 178     [0x46] = { 64,      16,     9, 5, NAND_BUSWIDTH_16 },
 179     [0x56] = { 64,      16,     9, 5, NAND_BUSWIDTH_16 },
 180
 181     [0x78] = { 128,     8,      9, 5, 0 },
 182     [0x39] = { 128,     8,      9, 5, 0 },
 183     [0x79] = { 128,     8,      9, 5, 0 },
 184     [0x72] = { 128,     16,     9, 5, NAND_BUSWIDTH_16 },
 185     [0x49] = { 128,     16,     9, 5, NAND_BUSWIDTH_16 },
 186     [0x74] = { 128,     16,     9, 5, NAND_BUSWIDTH_16 },
 187     [0x59] = { 128,     16,     9, 5, NAND_BUSWIDTH_16 },
 188
 189     [0x71] = { 256,     8,      9, 5, 0 },
 190
 191     /*
 192      * These are the new chips with large page size. The pagesize and the
 193      * erasesize is determined from the extended id bytes
 194      */
 195 # define LP_OPTIONS     (NAND_SAMSUNG_LP | NAND_NO_READRDY | NAND_NO_AUTOINCR)
 196 # define LP_OPTIONS16   (LP_OPTIONS | NAND_BUSWIDTH_16)
 197
 198     /* 512 Megabit */
 199     [0xa2] = { 64,      8,      0, 0, LP_OPTIONS },
 200     [0xf2] = { 64,      8,      0, 0, LP_OPTIONS },
 201     [0xb2] = { 64,      16,     0, 0, LP_OPTIONS16 },
 202     [0xc2] = { 64,      16,     0, 0, LP_OPTIONS16 },
 203
 204     /* 1 Gigabit */
 205     [0xa1] = { 128,     8,      0, 0, LP_OPTIONS },
 206     [0xf1] = { 128,     8,      0, 0, LP_OPTIONS },
 207     [0xb1] = { 128,     16,     0, 0, LP_OPTIONS16 },
 208     [0xc1] = { 128,     16,     0, 0, LP_OPTIONS16 },
 209
 210     /* 2 Gigabit */
 211     [0xaa] = { 256,     8,      0, 0, LP_OPTIONS },
 212     [0xda] = { 256,     8,      0, 0, LP_OPTIONS },
 213     [0xba] = { 256,     16,     0, 0, LP_OPTIONS16 },
 214     [0xca] = { 256,     16,     0, 0, LP_OPTIONS16 },
 215
 216     /* 4 Gigabit */
 217     [0xac] = { 512,     8,      0, 0, LP_OPTIONS },
 218     [0xdc] = { 512,     8,      0, 0, LP_OPTIONS },
 219     [0xbc] = { 512,     16,     0, 0, LP_OPTIONS16 },
 220     [0xcc] = { 512,     16,     0, 0, LP_OPTIONS16 },
 221
 222     /* 8 Gigabit */
 223     [0xa3] = { 1024,    8,      0, 0, LP_OPTIONS },
 224     [0xd3] = { 1024,    8,      0, 0, LP_OPTIONS },
 225     [0xb3] = { 1024,    16,     0, 0, LP_OPTIONS16 },
 226     [0xc3] = { 1024,    16,     0, 0, LP_OPTIONS16 },
 227
 228     /* 16 Gigabit */
 229     [0xa5] = { 2048,    8,      0, 0, LP_OPTIONS },
 230     [0xd5] = { 2048,    8,      0, 0, LP_OPTIONS },
 231     [0xb5] = { 2048,    16,     0, 0, LP_OPTIONS16 },
 232     [0xc5] = { 2048,    16,     0, 0, LP_OPTIONS16 },
 233 };
 234
 235 static void nand_reset(DeviceState *dev)
 236 {
 237     NANDFlashState *s = NAND(dev);
 238     s->cmd = NAND_CMD_READ0;
 239     s->addr = 0;
 240     s->addrlen = 0;
 241     s->iolen = 0;
 242     s->offset = 0;
 243     s->status &= NAND_IOSTATUS_UNPROTCT;
 244     s->status |= NAND_IOSTATUS_READY;
 245 }
 246
 247 static inline void nand_pushio_byte(NANDFlashState *s, uint8_t value)
 248 {
 249     s->ioaddr[s->iolen++] = value;
 250     for (value = s->buswidth; --value;) {
 251         s->ioaddr[s->iolen++] = 0;
 252     }
 253 }
 254
 255 static void nand_command(NANDFlashState *s)
 256 {
 257     unsigned int offset;
 258     switch (s->cmd) {
 259     case NAND_CMD_READ0:
 260         s->iolen = 0;
 261         break;
 262
 263     case NAND_CMD_READID:
 264         s->ioaddr = s->io;
 265         s->iolen = 0;
 266         nand_pushio_byte(s, s->manf_id);
 267         nand_pushio_byte(s, s->chip_id);
 268         nand_pushio_byte(s, 'Q'); /* Don't-care byte (often 0xa5) */
 269         if (nand_flash_ids[s->chip_id].options & NAND_SAMSUNG_LP) {
 270             /* Page Size, Block Size, Spare Size; bit 6 indicates
 271              * 8 vs 16 bit width NAND.
 272              */
 273             nand_pushio_byte(s, (s->buswidth == 2) ? 0x55 : 0x15);
 274         } else {
 275             nand_pushio_byte(s, 0xc0); /* Multi-plane */
 276         }
 277         break;
 278
 279     case NAND_CMD_RANDOMREAD2:
 280     case NAND_CMD_NOSERIALREAD2:
 281         if (!(nand_flash_ids[s->chip_id].options & NAND_SAMSUNG_LP))
 282             break;
 283         offset = s->addr & ((1 << s->addr_shift) - 1);
 284         s->blk_load(s, s->addr, offset);
 285         if (s->gnd)
 286             s->iolen = (1 << s->page_shift) - offset;
 287         else
 288             s->iolen = (1 << s->page_shift) + (1 << s->oob_shift) - offset;
 289         break;
 290
 291     case NAND_CMD_RESET:
 292         nand_reset(DEVICE(s));
 293         break;
 294
 295     case NAND_CMD_PAGEPROGRAM1:
 296         s->ioaddr = s->io;
 297         s->iolen = 0;
 298         break;
 299
 300     case NAND_CMD_PAGEPROGRAM2:
 301         if (s->wp) {
 302             s->blk_write(s);
 303         }
 304         break;
 305
 306     case NAND_CMD_BLOCKERASE1:
 307         break;
 308
 309     case NAND_CMD_BLOCKERASE2:
 310         s->addr &= (1ull << s->addrlen * 8) - 1;
 311         s->addr <<= nand_flash_ids[s->chip_id].options & NAND_SAMSUNG_LP ?
 312                                                                     16 : 8;
 313
 314         if (s->wp) {
 315             s->blk_erase(s);
 316         }
 317         break;
 318
 319     case NAND_CMD_READSTATUS:
 320         s->ioaddr = s->io;
 321         s->iolen = 0;
 322         nand_pushio_byte(s, s->status);
 323         break;
 324
 325     default:
 326         printf("%s: Unknown NAND command 0x%02x\n", __func__, s->cmd);
 327     }
 328 }
 329
 330 static int nand_pre_save(void *opaque)
 331 {
 332     NANDFlashState *s = NAND(opaque);
 333
 334     s->ioaddr_vmstate = s->ioaddr - s->io;
 335
 336     return 0;
 337 }
 338
 339 static int nand_post_load(void *opaque, int version_id)
 340 {
 341     NANDFlashState *s = NAND(opaque);
 342
 343     if (s->ioaddr_vmstate > sizeof(s->io)) {
 344         return -EINVAL;
 345     }
 346     s->ioaddr = s->io + s->ioaddr_vmstate;
 347
 348     return 0;
 349 }
 350
 351 static const VMStateDescription vmstate_nand = {
 352     .name = "nand",
 353     .version_id = 1,
 354     .minimum_version_id = 1,
 355     .pre_save = nand_pre_save,
 356     .post_load = nand_post_load,
 357     .fields = (VMStateField[]) {
 358         VMSTATE_UINT8(cle, NANDFlashState),
 359         VMSTATE_UINT8(ale, NANDFlashState),
 360         VMSTATE_UINT8(ce, NANDFlashState),
 361         VMSTATE_UINT8(wp, NANDFlashState),
 362         VMSTATE_UINT8(gnd, NANDFlashState),
 363         VMSTATE_BUFFER(io, NANDFlashState),
 364         VMSTATE_UINT32(ioaddr_vmstate, NANDFlashState),
 365         VMSTATE_INT32(iolen, NANDFlashState),
 366         VMSTATE_UINT32(cmd, NANDFlashState),
 367         VMSTATE_UINT64(addr, NANDFlashState),
 368         VMSTATE_INT32(addrlen, NANDFlashState),
 369         VMSTATE_INT32(status, NANDFlashState),
 370         VMSTATE_INT32(offset, NANDFlashState),
 371         /* XXX: do we want to save s->storage too? */
 372         VMSTATE_END_OF_LIST()
 373     }
 374 };
 375
 376 static void nand_realize(DeviceState *dev, Error **errp)
 377 {
 378     int pagesize;
 379     NANDFlashState *s = NAND(dev);
 380     int ret;
 381
 382
 383     s->buswidth = nand_flash_ids[s->chip_id].width >> 3;
 384     s->size = nand_flash_ids[s->chip_id].size << 20;
 385     if (nand_flash_ids[s->chip_id].options & NAND_SAMSUNG_LP) {
 386         s->page_shift = 11;
 387         s->erase_shift = 6;
 388     } else {
 389         s->page_shift = nand_flash_ids[s->chip_id].page_shift;
 390         s->erase_shift = nand_flash_ids[s->chip_id].erase_shift;
 391     }
 392
 393     switch (1 << s->page_shift) {
 394     case 256:
 395         nand_init_256(s);
 396         break;
 397     case 512:
 398         nand_init_512(s);
 399         break;
 400     case 2048:
 401         nand_init_2048(s);
 402         break;
 403     default:
 404         error_setg(errp, "Unsupported NAND block size %#x",
 405                    1 << s->page_shift);
 406         return;
 407     }
 408
 409     pagesize = 1 << s->oob_shift;
 410     s->mem_oob = 1;
 411     if (s->blk) {
 412         if (blk_is_read_only(s->blk)) {
 413             error_setg(errp, "Can't use a read-only drive");
 414             return;
 415         }
 416         ret = blk_set_perm(s->blk, BLK_PERM_CONSISTENT_READ | BLK_PERM_WRITE,
 417                            BLK_PERM_ALL, errp);
 418         if (ret < 0) {
 419             return;
 420         }
 421         if (blk_getlength(s->blk) >=
 422                 (s->pages << s->page_shift) + (s->pages << s->oob_shift)) {
 423             pagesize = 0;
 424             s->mem_oob = 0;
 425         }
 426     } else {
 427         pagesize += 1 << s->page_shift;
 428     }
 429     if (pagesize) {
 430         s->storage = (uint8_t *) memset(g_malloc(s->pages * pagesize),
 431                         0xff, s->pages * pagesize);
 432     }
 433     /* Give s->ioaddr a sane value in case we save state before it is used. */
 434     s->ioaddr = s->io;
 435 }
 436
 437 static Property nand_properties[] = {
 438     DEFINE_PROP_UINT8("manufacturer_id", NANDFlashState, manf_id, 0),
 439     DEFINE_PROP_UINT8("chip_id", NANDFlashState, chip_id, 0),
 440     DEFINE_PROP_DRIVE("drive", NANDFlashState, blk),
 441     DEFINE_PROP_END_OF_LIST(),
 442 };
 443
 444 static void nand_class_init(ObjectClass *klass, void *data)
 445 {
 446     DeviceClass *dc = DEVICE_CLASS(klass);
 447
 448     dc->realize = nand_realize;
 449     dc->reset = nand_reset;
 450     dc->vmsd = &vmstate_nand;
 451     device_class_set_props(dc, nand_properties);
 452 }
 453
 454 static const TypeInfo nand_info = {
 455     .name          = TYPE_NAND,
 456     .parent        = TYPE_DEVICE,
 457     .instance_size = sizeof(NANDFlashState),
 458     .class_init    = nand_class_init,
 459 };
 460
 461 static void nand_register_types(void)
 462 {
 463     type_register_static(&nand_info);
 464 }
 465
 466 /*
 467  * Chip inputs are CLE, ALE, CE, WP, GND and eight I/O pins.  Chip
 468  * outputs are R/B and eight I/O pins.
 469  *
 470  * CE, WP and R/B are active low.
 471  */
 472 void nand_setpins(DeviceState *dev, uint8_t cle, uint8_t ale,
 473                   uint8_t ce, uint8_t wp, uint8_t gnd)
 474 {
 475     NANDFlashState *s = NAND(dev);
 476
 477     s->cle = cle;
 478     s->ale = ale;
 479     s->ce = ce;
 480     s->wp = wp;
 481     s->gnd = gnd;
 482     if (wp) {
 483         s->status |= NAND_IOSTATUS_UNPROTCT;
 484     } else {
 485         s->status &= ~NAND_IOSTATUS_UNPROTCT;
 486     }
 487 }
 488
 489 void nand_getpins(DeviceState *dev, int *rb)
 490 {
 491     *rb = 1;
 492 }
 493
 494 void nand_setio(DeviceState *dev, uint32_t value)
 495 {
 496     int i;
 497     NANDFlashState *s = NAND(dev);
 498
 499     if (!s->ce && s->cle) {
 500         if (nand_flash_ids[s->chip_id].options & NAND_SAMSUNG_LP) {
 501             if (s->cmd == NAND_CMD_READ0 && value == NAND_CMD_LPREAD2)
 502                 return;
 503             if (value == NAND_CMD_RANDOMREAD1) {
 504                 s->addr &= ~((1 << s->addr_shift) - 1);
 505                 s->addrlen = 0;
 506                 return;
 507             }
 508         }
 509         if (value == NAND_CMD_READ0) {
 510             s->offset = 0;
 511         } else if (value == NAND_CMD_READ1) {
 512             s->offset = 0x100;
 513             value = NAND_CMD_READ0;
 514         } else if (value == NAND_CMD_READ2) {
 515             s->offset = 1 << s->page_shift;
 516             value = NAND_CMD_READ0;
 517         }
 518
 519         s->cmd = value;
 520
 521         if (s->cmd == NAND_CMD_READSTATUS ||
 522                 s->cmd == NAND_CMD_PAGEPROGRAM2 ||
 523                 s->cmd == NAND_CMD_BLOCKERASE1 ||
 524                 s->cmd == NAND_CMD_BLOCKERASE2 ||
 525                 s->cmd == NAND_CMD_NOSERIALREAD2 ||
 526                 s->cmd == NAND_CMD_RANDOMREAD2 ||
 527                 s->cmd == NAND_CMD_RESET) {
 528             nand_command(s);
 529         }
 530
 531         if (s->cmd != NAND_CMD_RANDOMREAD2) {
 532             s->addrlen = 0;
 533         }
 534     }
 535
 536     if (s->ale) {
 537         unsigned int shift = s->addrlen * 8;
 538         uint64_t mask = ~(0xffull << shift);
 539         uint64_t v = (uint64_t)value << shift;
 540
 541         s->addr = (s->addr & mask) | v;
 542         s->addrlen ++;
 543
 544         switch (s->addrlen) {
 545         case 1:
 546             if (s->cmd == NAND_CMD_READID) {
 547                 nand_command(s);
 548             }
 549             break;
 550         case 2: /* fix cache address as a byte address */
 551             s->addr <<= (s->buswidth - 1);
 552             break;
 553         case 3:
 554             if (!(nand_flash_ids[s->chip_id].options & NAND_SAMSUNG_LP) &&
 555                     (s->cmd == NAND_CMD_READ0 ||
 556                      s->cmd == NAND_CMD_PAGEPROGRAM1)) {
 557                 nand_command(s);
 558             }
 559             break;
 560         case 4:
 561             if ((nand_flash_ids[s->chip_id].options & NAND_SAMSUNG_LP) &&
 562                     nand_flash_ids[s->chip_id].size < 256 && /* 1Gb or less */
 563                     (s->cmd == NAND_CMD_READ0 ||
 564                      s->cmd == NAND_CMD_PAGEPROGRAM1)) {
 565                 nand_command(s);
 566             }
 567             break;
 568         case 5:
 569             if ((nand_flash_ids[s->chip_id].options & NAND_SAMSUNG_LP) &&
 570                     nand_flash_ids[s->chip_id].size >= 256 && /* 2Gb or more */
 571                     (s->cmd == NAND_CMD_READ0 ||
 572                      s->cmd == NAND_CMD_PAGEPROGRAM1)) {
 573                 nand_command(s);
 574             }
 575             break;
 576         default:
 577             break;
 578         }
 579     }
 580
 581     if (!s->cle && !s->ale && s->cmd == NAND_CMD_PAGEPROGRAM1) {
 582         if (s->iolen < (1 << s->page_shift) + (1 << s->oob_shift)) {
 583             for (i = s->buswidth; i--; value >>= 8) {
 584                 s->io[s->iolen ++] = (uint8_t) (value & 0xff);
 585             }
 586         }
 587     } else if (!s->cle && !s->ale && s->cmd == NAND_CMD_COPYBACKPRG1) {
 588         if ((s->addr & ((1 << s->addr_shift) - 1)) <
 589                 (1 << s->page_shift) + (1 << s->oob_shift)) {
 590             for (i = s->buswidth; i--; s->addr++, value >>= 8) {
 591                 s->io[s->iolen + (s->addr & ((1 << s->addr_shift) - 1))] =
 592                     (uint8_t) (value & 0xff);
 593             }
 594         }
 595     }
 596 }
 597
 598 uint32_t nand_getio(DeviceState *dev)
 599 {
 600     int offset;
 601     uint32_t x = 0;
 602     NANDFlashState *s = NAND(dev);
 603
 604     /* Allow sequential reading */
 605     if (!s->iolen && s->cmd == NAND_CMD_READ0) {
 606         offset = (int) (s->addr & ((1 << s->addr_shift) - 1)) + s->offset;
 607         s->offset = 0;
 608
 609         s->blk_load(s, s->addr, offset);
 610         if (s->gnd)
 611             s->iolen = (1 << s->page_shift) - offset;
 612         else
 613             s->iolen = (1 << s->page_shift) + (1 << s->oob_shift) - offset;
 614     }
 615
 616     if (s->ce || s->iolen <= 0) {
 617         return 0;
 618     }
 619
 620     for (offset = s->buswidth; offset--;) {
 621         x |= s->ioaddr[offset] << (offset << 3);
 622     }
 623     /* after receiving READ STATUS command all subsequent reads will
 624      * return the status register value until another command is issued
 625      */
 626     if (s->cmd != NAND_CMD_READSTATUS) {
 627         s->addr   += s->buswidth;
 628         s->ioaddr += s->buswidth;
 629         s->iolen  -= s->buswidth;
 630     }
 631     return x;
 632 }
 633
 634 uint32_t nand_getbuswidth(DeviceState *dev)
 635 {
 636     NANDFlashState *s = (NANDFlashState *) dev;
 637     return s->buswidth << 3;
 638 }
 639
 640 DeviceState *nand_init(BlockBackend *blk, int manf_id, int chip_id)
 641 {
 642     DeviceState *dev;
 643
 644     if (nand_flash_ids[chip_id].size == 0) {
 645         hw_error("%s: Unsupported NAND chip ID.\n", __func__);
 646     }
 647     dev = DEVICE(object_new(TYPE_NAND));
 648     qdev_prop_set_uint8(dev, "manufacturer_id", manf_id);
 649     qdev_prop_set_uint8(dev, "chip_id", chip_id);
 650     if (blk) {
 651         qdev_prop_set_drive(dev, "drive", blk, &error_fatal);
 652     }
 653
 654     qdev_init_nofail(dev);
 655     return dev;
 656 }
 657
 658 type_init(nand_register_types)
 659
 660 #else
 661
 662 /* Program a single page */
 663 static void glue(nand_blk_write_, PAGE_SIZE)(NANDFlashState *s)
 664 {
 665     uint64_t off, page, sector, soff;
 666     uint8_t iobuf[(PAGE_SECTORS + 2) * 0x200];
 667     if (PAGE(s->addr) >= s->pages)
 668         return;
 669
 670     if (!s->blk) {
 671         mem_and(s->storage + PAGE_START(s->addr) + (s->addr & PAGE_MASK) +
 672                         s->offset, s->io, s->iolen);
 673     } else if (s->mem_oob) {
 674         sector = SECTOR(s->addr);
 675         off = (s->addr & PAGE_MASK) + s->offset;
 676         soff = SECTOR_OFFSET(s->addr);
 677         if (blk_pread(s->blk, sector << BDRV_SECTOR_BITS, iobuf,
 678                       PAGE_SECTORS << BDRV_SECTOR_BITS) < 0) {
 679             printf("%s: read error in sector %" PRIu64 "\n", __func__, sector);
 680             return;
 681         }
 682
 683         mem_and(iobuf + (soff | off), s->io, MIN(s->iolen, PAGE_SIZE - off));
 684         if (off + s->iolen > PAGE_SIZE) {
 685             page = PAGE(s->addr);
 686             mem_and(s->storage + (page << OOB_SHIFT), s->io + PAGE_SIZE - off,
 687                             MIN(OOB_SIZE, off + s->iolen - PAGE_SIZE));
 688         }
 689
 690         if (blk_pwrite(s->blk, sector << BDRV_SECTOR_BITS, iobuf,
 691                        PAGE_SECTORS << BDRV_SECTOR_BITS, 0) < 0) {
 692             printf("%s: write error in sector %" PRIu64 "\n", __func__, sector);
 693         }
 694     } else {
 695         off = PAGE_START(s->addr) + (s->addr & PAGE_MASK) + s->offset;
 696         sector = off >> 9;
 697         soff = off & 0x1ff;
 698         if (blk_pread(s->blk, sector << BDRV_SECTOR_BITS, iobuf,
 699                       (PAGE_SECTORS + 2) << BDRV_SECTOR_BITS) < 0) {
 700             printf("%s: read error in sector %" PRIu64 "\n", __func__, sector);
 701             return;
 702         }
 703
 704         mem_and(iobuf + soff, s->io, s->iolen);
 705
 706         if (blk_pwrite(s->blk, sector << BDRV_SECTOR_BITS, iobuf,
 707                        (PAGE_SECTORS + 2) << BDRV_SECTOR_BITS, 0) < 0) {
 708             printf("%s: write error in sector %" PRIu64 "\n", __func__, sector);
 709         }
 710     }
 711     s->offset = 0;
 712 }
 713
 714 /* Erase a single block */
 715 static void glue(nand_blk_erase_, PAGE_SIZE)(NANDFlashState *s)
 716 {
 717     uint64_t i, page, addr;
 718     uint8_t iobuf[0x200] = { [0 ... 0x1ff] = 0xff, };
 719     addr = s->addr & ~((1 << (ADDR_SHIFT + s->erase_shift)) - 1);
 720
 721     if (PAGE(addr) >= s->pages) {
 722         return;
 723     }
 724
 725     if (!s->blk) {
 726         memset(s->storage + PAGE_START(addr),
 727                         0xff, (PAGE_SIZE + OOB_SIZE) << s->erase_shift);
 728     } else if (s->mem_oob) {
 729         memset(s->storage + (PAGE(addr) << OOB_SHIFT),
 730                         0xff, OOB_SIZE << s->erase_shift);
 731         i = SECTOR(addr);
 732         page = SECTOR(addr + (1 << (ADDR_SHIFT + s->erase_shift)));
 733         for (; i < page; i ++)
 734             if (blk_pwrite(s->blk, i << BDRV_SECTOR_BITS, iobuf,
 735                            BDRV_SECTOR_SIZE, 0) < 0) {
 736                 printf("%s: write error in sector %" PRIu64 "\n", __func__, i);
 737             }
 738     } else {
 739         addr = PAGE_START(addr);
 740         page = addr >> 9;
 741         if (blk_pread(s->blk, page << BDRV_SECTOR_BITS, iobuf,
 742                       BDRV_SECTOR_SIZE) < 0) {
 743             printf("%s: read error in sector %" PRIu64 "\n", __func__, page);
 744         }
 745         memset(iobuf + (addr & 0x1ff), 0xff, (~addr & 0x1ff) + 1);
 746         if (blk_pwrite(s->blk, page << BDRV_SECTOR_BITS, iobuf,
 747                        BDRV_SECTOR_SIZE, 0) < 0) {
 748             printf("%s: write error in sector %" PRIu64 "\n", __func__, page);
 749         }
 750
 751         memset(iobuf, 0xff, 0x200);
 752         i = (addr & ~0x1ff) + 0x200;
 753         for (addr += ((PAGE_SIZE + OOB_SIZE) << s->erase_shift) - 0x200;
 754                         i < addr; i += 0x200) {
 755             if (blk_pwrite(s->blk, i, iobuf, BDRV_SECTOR_SIZE, 0) < 0) {
 756                 printf("%s: write error in sector %" PRIu64 "\n",
 757                        __func__, i >> 9);
 758             }
 759         }
 760
 761         page = i >> 9;
 762         if (blk_pread(s->blk, page << BDRV_SECTOR_BITS, iobuf,
 763                       BDRV_SECTOR_SIZE) < 0) {
 764             printf("%s: read error in sector %" PRIu64 "\n", __func__, page);
 765         }
 766         memset(iobuf, 0xff, ((addr - 1) & 0x1ff) + 1);
 767         if (blk_pwrite(s->blk, page << BDRV_SECTOR_BITS, iobuf,
 768                        BDRV_SECTOR_SIZE, 0) < 0) {
 769             printf("%s: write error in sector %" PRIu64 "\n", __func__, page);
 770         }
 771     }
 772 }
 773
 774 static void glue(nand_blk_load_, PAGE_SIZE)(NANDFlashState *s,
 775                 uint64_t addr, int offset)
 776 {
 777     if (PAGE(addr) >= s->pages) {
 778         return;
 779     }
 780
 781     if (s->blk) {
 782         if (s->mem_oob) {
 783             if (blk_pread(s->blk, SECTOR(addr) << BDRV_SECTOR_BITS, s->io,
 784                           PAGE_SECTORS << BDRV_SECTOR_BITS) < 0) {
 785                 printf("%s: read error in sector %" PRIu64 "\n",
 786                                 __func__, SECTOR(addr));
 787             }
 788             memcpy(s->io + SECTOR_OFFSET(s->addr) + PAGE_SIZE,
 789                             s->storage + (PAGE(s->addr) << OOB_SHIFT),
 790                             OOB_SIZE);
 791             s->ioaddr = s->io + SECTOR_OFFSET(s->addr) + offset;
 792         } else {
 793             if (blk_pread(s->blk, PAGE_START(addr), s->io,
 794                           (PAGE_SECTORS + 2) << BDRV_SECTOR_BITS) < 0) {
 795                 printf("%s: read error in sector %" PRIu64 "\n",
 796                                 __func__, PAGE_START(addr) >> 9);
 797             }
 798             s->ioaddr = s->io + (PAGE_START(addr) & 0x1ff) + offset;
 799         }
 800     } else {
 801         memcpy(s->io, s->storage + PAGE_START(s->addr) +
 802                         offset, PAGE_SIZE + OOB_SIZE - offset);
 803         s->ioaddr = s->io;
 804     }
 805 }
 806
 807 static void glue(nand_init_, PAGE_SIZE)(NANDFlashState *s)
 808 {
 809     s->oob_shift = PAGE_SHIFT - 5;
 810     s->pages = s->size >> PAGE_SHIFT;
 811     s->addr_shift = ADDR_SHIFT;
 812
 813     s->blk_erase = glue(nand_blk_erase_, PAGE_SIZE);
 814     s->blk_write = glue(nand_blk_write_, PAGE_SIZE);
 815     s->blk_load = glue(nand_blk_load_, PAGE_SIZE);
 816 }
 817
 818 # undef PAGE_SIZE
 819 # undef PAGE_SHIFT
 820 # undef PAGE_SECTORS
 821 # undef ADDR_SHIFT
 822 #endif  /* NAND_IO */