hw/pflash_cfi02.c

   1 /*
   2  *  CFI parallel flash with AMD command set emulation
   3  *
   4  *  Copyright (c) 2005 Jocelyn Mayer
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2 of the License, or (at your option) any later version.
  10  *
  11  * This library is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with this library; if not, see <http://www.gnu.org/licenses/>.
  18  */
  19
  20 /*
  21  * For now, this code can emulate flashes of 1, 2 or 4 bytes width.
  22  * Supported commands/modes are:
  23  * - flash read
  24  * - flash write
  25  * - flash ID read
  26  * - sector erase
  27  * - chip erase
  28  * - unlock bypass command
  29  * - CFI queries
  30  *
  31  * It does not support flash interleaving.
  32  * It does not implement boot blocs with reduced size
  33  * It does not implement software data protection as found in many real chips
  34  * It does not implement erase suspend/resume commands
  35  * It does not implement multiple sectors erase
  36  */
  37
  38 #include "hw.h"
  39 #include "flash.h"
  40 #include "qemu/timer.h"
  41 #include "block/block.h"
  42 #include "exec/address-spaces.h"
  43 #include "qemu/host-utils.h"
  44 #include "sysbus.h"
  45
  46 //#define PFLASH_DEBUG
  47 #ifdef PFLASH_DEBUG
  48 #define DPRINTF(fmt, ...)                                  \
  49 do {                                                       \
  50     fprintf(stderr "PFLASH: " fmt , ## __VA_ARGS__);       \
  51 } while (0)
  52 #else
  53 #define DPRINTF(fmt, ...) do { } while (0)
  54 #endif
  55
  56 #define PFLASH_LAZY_ROMD_THRESHOLD 42
  57
  58 struct pflash_t {
  59     SysBusDevice busdev;
  60     BlockDriverState *bs;
  61     uint32_t sector_len;
  62     uint32_t nb_blocs;
  63     uint32_t chip_len;
  64     uint8_t mappings;
  65     uint8_t width;
  66     uint8_t be;
  67     int wcycle; /* if 0, the flash is read normally */
  68     int bypass;
  69     int ro;
  70     uint8_t cmd;
  71     uint8_t status;
  72     /* FIXME: implement array device properties */
  73     uint16_t ident0;
  74     uint16_t ident1;
  75     uint16_t ident2;
  76     uint16_t ident3;
  77     uint16_t unlock_addr0;
  78     uint16_t unlock_addr1;
  79     uint8_t cfi_len;
  80     uint8_t cfi_table[0x52];
  81     QEMUTimer *timer;
  82     /* The device replicates the flash memory across its memory space.  Emulate
  83      * that by having a container (.mem) filled with an array of aliases
  84      * (.mem_mappings) pointing to the flash memory (.orig_mem).
  85      */
  86     MemoryRegion mem;
  87     MemoryRegion *mem_mappings;    /* array; one per mapping */
  88     MemoryRegion orig_mem;
  89     int rom_mode;
  90     int read_counter; /* used for lazy switch-back to rom mode */
  91     char *name;
  92     void *storage;
  93 };
  94
  95 /*
  96  * Set up replicated mappings of the same region.
  97  */
  98 static void pflash_setup_mappings(pflash_t *pfl)
  99 {
 100     unsigned i;
 101     hwaddr size = memory_region_size(&pfl->orig_mem);
 102
 103     memory_region_init(&pfl->mem, "pflash", pfl->mappings * size);
 104     pfl->mem_mappings = g_new(MemoryRegion, pfl->mappings);
 105     for (i = 0; i < pfl->mappings; ++i) {
 106         memory_region_init_alias(&pfl->mem_mappings[i], "pflash-alias",
 107                                  &pfl->orig_mem, 0, size);
 108         memory_region_add_subregion(&pfl->mem, i * size, &pfl->mem_mappings[i]);
 109     }
 110 }
 111
 112 static void pflash_register_memory(pflash_t *pfl, int rom_mode)
 113 {
 114     memory_region_rom_device_set_readable(&pfl->orig_mem, rom_mode);
 115     pfl->rom_mode = rom_mode;
 116 }
 117
 118 static void pflash_timer (void *opaque)
 119 {
 120     pflash_t *pfl = opaque;
 121
 122     DPRINTF("%s: command %02x done\n", __func__, pfl->cmd);
 123     /* Reset flash */
 124     pfl->status ^= 0x80;
 125     if (pfl->bypass) {
 126         pfl->wcycle = 2;
 127     } else {
 128         pflash_register_memory(pfl, 1);
 129         pfl->wcycle = 0;
 130     }
 131     pfl->cmd = 0;
 132 }
 133
 134 static uint32_t pflash_read (pflash_t *pfl, hwaddr offset,
 135                              int width, int be)
 136 {
 137     hwaddr boff;
 138     uint32_t ret;
 139     uint8_t *p;
 140
 141     DPRINTF("%s: offset " TARGET_FMT_plx "\n", __func__, offset);
 142     ret = -1;
 143     /* Lazy reset to ROMD mode after a certain amount of read accesses */
 144     if (!pfl->rom_mode && pfl->wcycle == 0 &&
 145         ++pfl->read_counter > PFLASH_LAZY_ROMD_THRESHOLD) {
 146         pflash_register_memory(pfl, 1);
 147     }
 148     offset &= pfl->chip_len - 1;
 149     boff = offset & 0xFF;
 150     if (pfl->width == 2)
 151         boff = boff >> 1;
 152     else if (pfl->width == 4)
 153         boff = boff >> 2;
 154     switch (pfl->cmd) {
 155     default:
 156         /* This should never happen : reset state & treat it as a read*/
 157         DPRINTF("%s: unknown command state: %x\n", __func__, pfl->cmd);
 158         pfl->wcycle = 0;
 159         pfl->cmd = 0;
 160     case 0x80:
 161         /* We accept reads during second unlock sequence... */
 162     case 0x00:
 163     flash_read:
 164         /* Flash area read */
 165         p = pfl->storage;
 166         switch (width) {
 167         case 1:
 168             ret = p[offset];
 169 //            DPRINTF("%s: data offset %08x %02x\n", __func__, offset, ret);
 170             break;
 171         case 2:
 172             if (be) {
 173                 ret = p[offset] << 8;
 174                 ret |= p[offset + 1];
 175             } else {
 176                 ret = p[offset];
 177                 ret |= p[offset + 1] << 8;
 178             }
 179 //            DPRINTF("%s: data offset %08x %04x\n", __func__, offset, ret);
 180             break;
 181         case 4:
 182             if (be) {
 183                 ret = p[offset] << 24;
 184                 ret |= p[offset + 1] << 16;
 185                 ret |= p[offset + 2] << 8;
 186                 ret |= p[offset + 3];
 187             } else {
 188                 ret = p[offset];
 189                 ret |= p[offset + 1] << 8;
 190                 ret |= p[offset + 2] << 16;
 191                 ret |= p[offset + 3] << 24;
 192             }
 193 //            DPRINTF("%s: data offset %08x %08x\n", __func__, offset, ret);
 194             break;
 195         }
 196         break;
 197     case 0x90:
 198         /* flash ID read */
 199         switch (boff) {
 200         case 0x00:
 201         case 0x01:
 202             ret = boff & 0x01 ? pfl->ident1 : pfl->ident0;
 203             break;
 204         case 0x02:
 205             ret = 0x00; /* Pretend all sectors are unprotected */
 206             break;
 207         case 0x0E:
 208         case 0x0F:
 209             ret = boff & 0x01 ? pfl->ident3 : pfl->ident2;
 210             if (ret == (uint8_t)-1) {
 211                 goto flash_read;
 212             }
 213             break;
 214         default:
 215             goto flash_read;
 216         }
 217         DPRINTF("%s: ID " TARGET_FMT_plx " %x\n", __func__, boff, ret);
 218         break;
 219     case 0xA0:
 220     case 0x10:
 221     case 0x30:
 222         /* Status register read */
 223         ret = pfl->status;
 224         DPRINTF("%s: status %x\n", __func__, ret);
 225         /* Toggle bit 6 */
 226         pfl->status ^= 0x40;
 227         break;
 228     case 0x98:
 229         /* CFI query mode */
 230         if (boff > pfl->cfi_len)
 231             ret = 0;
 232         else
 233             ret = pfl->cfi_table[boff];
 234         break;
 235     }
 236
 237     return ret;
 238 }
 239
 240 /* update flash content on disk */
 241 static void pflash_update(pflash_t *pfl, int offset,
 242                           int size)
 243 {
 244     int offset_end;
 245     if (pfl->bs) {
 246         offset_end = offset + size;
 247         /* round to sectors */
 248         offset = offset >> 9;
 249         offset_end = (offset_end + 511) >> 9;
 250         bdrv_write(pfl->bs, offset, pfl->storage + (offset << 9),
 251                    offset_end - offset);
 252     }
 253 }
 254
 255 static void pflash_write (pflash_t *pfl, hwaddr offset,
 256                           uint32_t value, int width, int be)
 257 {
 258     hwaddr boff;
 259     uint8_t *p;
 260     uint8_t cmd;
 261
 262     cmd = value;
 263     if (pfl->cmd != 0xA0 && cmd == 0xF0) {
 264 #if 0
 265         DPRINTF("%s: flash reset asked (%02x %02x)\n",
 266                 __func__, pfl->cmd, cmd);
 267 #endif
 268         goto reset_flash;
 269     }
 270     DPRINTF("%s: offset " TARGET_FMT_plx " %08x %d %d\n", __func__,
 271             offset, value, width, pfl->wcycle);
 272     offset &= pfl->chip_len - 1;
 273
 274     DPRINTF("%s: offset " TARGET_FMT_plx " %08x %d\n", __func__,
 275             offset, value, width);
 276     boff = offset & (pfl->sector_len - 1);
 277     if (pfl->width == 2)
 278         boff = boff >> 1;
 279     else if (pfl->width == 4)
 280         boff = boff >> 2;
 281     switch (pfl->wcycle) {
 282     case 0:
 283         /* Set the device in I/O access mode if required */
 284         if (pfl->rom_mode)
 285             pflash_register_memory(pfl, 0);
 286         pfl->read_counter = 0;
 287         /* We're in read mode */
 288     check_unlock0:
 289         if (boff == 0x55 && cmd == 0x98) {
 290         enter_CFI_mode:
 291             /* Enter CFI query mode */
 292             pfl->wcycle = 7;
 293             pfl->cmd = 0x98;
 294             return;
 295         }
 296         if (boff != pfl->unlock_addr0 || cmd != 0xAA) {
 297             DPRINTF("%s: unlock0 failed " TARGET_FMT_plx " %02x %04x\n",
 298                     __func__, boff, cmd, pfl->unlock_addr0);
 299             goto reset_flash;
 300         }
 301         DPRINTF("%s: unlock sequence started\n", __func__);
 302         break;
 303     case 1:
 304         /* We started an unlock sequence */
 305     check_unlock1:
 306         if (boff != pfl->unlock_addr1 || cmd != 0x55) {
 307             DPRINTF("%s: unlock1 failed " TARGET_FMT_plx " %02x\n", __func__,
 308                     boff, cmd);
 309             goto reset_flash;
 310         }
 311         DPRINTF("%s: unlock sequence done\n", __func__);
 312         break;
 313     case 2:
 314         /* We finished an unlock sequence */
 315         if (!pfl->bypass && boff != pfl->unlock_addr0) {
 316             DPRINTF("%s: command failed " TARGET_FMT_plx " %02x\n", __func__,
 317                     boff, cmd);
 318             goto reset_flash;
 319         }
 320         switch (cmd) {
 321         case 0x20:
 322             pfl->bypass = 1;
 323             goto do_bypass;
 324         case 0x80:
 325         case 0x90:
 326         case 0xA0:
 327             pfl->cmd = cmd;
 328             DPRINTF("%s: starting command %02x\n", __func__, cmd);
 329             break;
 330         default:
 331             DPRINTF("%s: unknown command %02x\n", __func__, cmd);
 332             goto reset_flash;
 333         }
 334         break;
 335     case 3:
 336         switch (pfl->cmd) {
 337         case 0x80:
 338             /* We need another unlock sequence */
 339             goto check_unlock0;
 340         case 0xA0:
 341             DPRINTF("%s: write data offset " TARGET_FMT_plx " %08x %d\n",
 342                     __func__, offset, value, width);
 343             p = pfl->storage;
 344             if (!pfl->ro) {
 345                 switch (width) {
 346                 case 1:
 347                     p[offset] &= value;
 348                     pflash_update(pfl, offset, 1);
 349                     break;
 350                 case 2:
 351                     if (be) {
 352                         p[offset] &= value >> 8;
 353                         p[offset + 1] &= value;
 354                     } else {
 355                         p[offset] &= value;
 356                         p[offset + 1] &= value >> 8;
 357                     }
 358                     pflash_update(pfl, offset, 2);
 359                     break;
 360                 case 4:
 361                     if (be) {
 362                         p[offset] &= value >> 24;
 363                         p[offset + 1] &= value >> 16;
 364                         p[offset + 2] &= value >> 8;
 365                         p[offset + 3] &= value;
 366                     } else {
 367                         p[offset] &= value;
 368                         p[offset + 1] &= value >> 8;
 369                         p[offset + 2] &= value >> 16;
 370                         p[offset + 3] &= value >> 24;
 371                     }
 372                     pflash_update(pfl, offset, 4);
 373                     break;
 374                 }
 375             }
 376             pfl->status = 0x00 | ~(value & 0x80);
 377             /* Let's pretend write is immediate */
 378             if (pfl->bypass)
 379                 goto do_bypass;
 380             goto reset_flash;
 381         case 0x90:
 382             if (pfl->bypass && cmd == 0x00) {
 383                 /* Unlock bypass reset */
 384                 goto reset_flash;
 385             }
 386             /* We can enter CFI query mode from autoselect mode */
 387             if (boff == 0x55 && cmd == 0x98)
 388                 goto enter_CFI_mode;
 389             /* No break here */
 390         default:
 391             DPRINTF("%s: invalid write for command %02x\n",
 392                     __func__, pfl->cmd);
 393             goto reset_flash;
 394         }
 395     case 4:
 396         switch (pfl->cmd) {
 397         case 0xA0:
 398             /* Ignore writes while flash data write is occurring */
 399             /* As we suppose write is immediate, this should never happen */
 400             return;
 401         case 0x80:
 402             goto check_unlock1;
 403         default:
 404             /* Should never happen */
 405             DPRINTF("%s: invalid command state %02x (wc 4)\n",
 406                     __func__, pfl->cmd);
 407             goto reset_flash;
 408         }
 409         break;
 410     case 5:
 411         switch (cmd) {
 412         case 0x10:
 413             if (boff != pfl->unlock_addr0) {
 414                 DPRINTF("%s: chip erase: invalid address " TARGET_FMT_plx "\n",
 415                         __func__, offset);
 416                 goto reset_flash;
 417             }
 418             /* Chip erase */
 419             DPRINTF("%s: start chip erase\n", __func__);
 420             if (!pfl->ro) {
 421                 memset(pfl->storage, 0xFF, pfl->chip_len);
 422                 pflash_update(pfl, 0, pfl->chip_len);
 423             }
 424             pfl->status = 0x00;
 425             /* Let's wait 5 seconds before chip erase is done */
 426             qemu_mod_timer(pfl->timer,
 427                            qemu_get_clock_ns(vm_clock) + (get_ticks_per_sec() * 5));
 428             break;
 429         case 0x30:
 430             /* Sector erase */
 431             p = pfl->storage;
 432             offset &= ~(pfl->sector_len - 1);
 433             DPRINTF("%s: start sector erase at " TARGET_FMT_plx "\n", __func__,
 434                     offset);
 435             if (!pfl->ro) {
 436                 memset(p + offset, 0xFF, pfl->sector_len);
 437                 pflash_update(pfl, offset, pfl->sector_len);
 438             }
 439             pfl->status = 0x00;
 440             /* Let's wait 1/2 second before sector erase is done */
 441             qemu_mod_timer(pfl->timer,
 442                            qemu_get_clock_ns(vm_clock) + (get_ticks_per_sec() / 2));
 443             break;
 444         default:
 445             DPRINTF("%s: invalid command %02x (wc 5)\n", __func__, cmd);
 446             goto reset_flash;
 447         }
 448         pfl->cmd = cmd;
 449         break;
 450     case 6:
 451         switch (pfl->cmd) {
 452         case 0x10:
 453             /* Ignore writes during chip erase */
 454             return;
 455         case 0x30:
 456             /* Ignore writes during sector erase */
 457             return;
 458         default:
 459             /* Should never happen */
 460             DPRINTF("%s: invalid command state %02x (wc 6)\n",
 461                     __func__, pfl->cmd);
 462             goto reset_flash;
 463         }
 464         break;
 465     case 7: /* Special value for CFI queries */
 466         DPRINTF("%s: invalid write in CFI query mode\n", __func__);
 467         goto reset_flash;
 468     default:
 469         /* Should never happen */
 470         DPRINTF("%s: invalid write state (wc 7)\n",  __func__);
 471         goto reset_flash;
 472     }
 473     pfl->wcycle++;
 474
 475     return;
 476
 477     /* Reset flash */
 478  reset_flash:
 479     pfl->bypass = 0;
 480     pfl->wcycle = 0;
 481     pfl->cmd = 0;
 482     return;
 483
 484  do_bypass:
 485     pfl->wcycle = 2;
 486     pfl->cmd = 0;
 487 }
 488
 489
 490 static uint32_t pflash_readb_be(void *opaque, hwaddr addr)
 491 {
 492     return pflash_read(opaque, addr, 1, 1);
 493 }
 494
 495 static uint32_t pflash_readb_le(void *opaque, hwaddr addr)
 496 {
 497     return pflash_read(opaque, addr, 1, 0);
 498 }
 499
 500 static uint32_t pflash_readw_be(void *opaque, hwaddr addr)
 501 {
 502     pflash_t *pfl = opaque;
 503
 504     return pflash_read(pfl, addr, 2, 1);
 505 }
 506
 507 static uint32_t pflash_readw_le(void *opaque, hwaddr addr)
 508 {
 509     pflash_t *pfl = opaque;
 510
 511     return pflash_read(pfl, addr, 2, 0);
 512 }
 513
 514 static uint32_t pflash_readl_be(void *opaque, hwaddr addr)
 515 {
 516     pflash_t *pfl = opaque;
 517
 518     return pflash_read(pfl, addr, 4, 1);
 519 }
 520
 521 static uint32_t pflash_readl_le(void *opaque, hwaddr addr)
 522 {
 523     pflash_t *pfl = opaque;
 524
 525     return pflash_read(pfl, addr, 4, 0);
 526 }
 527
 528 static void pflash_writeb_be(void *opaque, hwaddr addr,
 529                              uint32_t value)
 530 {
 531     pflash_write(opaque, addr, value, 1, 1);
 532 }
 533
 534 static void pflash_writeb_le(void *opaque, hwaddr addr,
 535                              uint32_t value)
 536 {
 537     pflash_write(opaque, addr, value, 1, 0);
 538 }
 539
 540 static void pflash_writew_be(void *opaque, hwaddr addr,
 541                              uint32_t value)
 542 {
 543     pflash_t *pfl = opaque;
 544
 545     pflash_write(pfl, addr, value, 2, 1);
 546 }
 547
 548 static void pflash_writew_le(void *opaque, hwaddr addr,
 549                              uint32_t value)
 550 {
 551     pflash_t *pfl = opaque;
 552
 553     pflash_write(pfl, addr, value, 2, 0);
 554 }
 555
 556 static void pflash_writel_be(void *opaque, hwaddr addr,
 557                              uint32_t value)
 558 {
 559     pflash_t *pfl = opaque;
 560
 561     pflash_write(pfl, addr, value, 4, 1);
 562 }
 563
 564 static void pflash_writel_le(void *opaque, hwaddr addr,
 565                              uint32_t value)
 566 {
 567     pflash_t *pfl = opaque;
 568
 569     pflash_write(pfl, addr, value, 4, 0);
 570 }
 571
 572 static const MemoryRegionOps pflash_cfi02_ops_be = {
 573     .old_mmio = {
 574         .read = { pflash_readb_be, pflash_readw_be, pflash_readl_be, },
 575         .write = { pflash_writeb_be, pflash_writew_be, pflash_writel_be, },
 576     },
 577     .endianness = DEVICE_NATIVE_ENDIAN,
 578 };
 579
 580 static const MemoryRegionOps pflash_cfi02_ops_le = {
 581     .old_mmio = {
 582         .read = { pflash_readb_le, pflash_readw_le, pflash_readl_le, },
 583         .write = { pflash_writeb_le, pflash_writew_le, pflash_writel_le, },
 584     },
 585     .endianness = DEVICE_NATIVE_ENDIAN,
 586 };
 587
 588 static int pflash_cfi02_init(SysBusDevice *dev)
 589 {
 590     pflash_t *pfl = FROM_SYSBUS(typeof(*pfl), dev);
 591     uint32_t chip_len;
 592     int ret;
 593
 594     chip_len = pfl->sector_len * pfl->nb_blocs;
 595     /* XXX: to be fixed */
 596 #if 0
 597     if (total_len != (8 * 1024 * 1024) && total_len != (16 * 1024 * 1024) &&
 598         total_len != (32 * 1024 * 1024) && total_len != (64 * 1024 * 1024))
 599         return NULL;
 600 #endif
 601
 602     memory_region_init_rom_device(&pfl->orig_mem, pfl->be ?
 603                                   &pflash_cfi02_ops_be : &pflash_cfi02_ops_le,
 604                                   pfl, pfl->name, chip_len);
 605     vmstate_register_ram(&pfl->orig_mem, DEVICE(pfl));
 606     pfl->storage = memory_region_get_ram_ptr(&pfl->orig_mem);
 607     pfl->chip_len = chip_len;
 608     if (pfl->bs) {
 609         /* read the initial flash content */
 610         ret = bdrv_read(pfl->bs, 0, pfl->storage, chip_len >> 9);
 611         if (ret < 0) {
 612             g_free(pfl);
 613             return 1;
 614         }
 615     }
 616
 617     pflash_setup_mappings(pfl);
 618     pfl->rom_mode = 1;
 619     sysbus_init_mmio(dev, &pfl->mem);
 620
 621     if (pfl->bs) {
 622         pfl->ro = bdrv_is_read_only(pfl->bs);
 623     } else {
 624         pfl->ro = 0;
 625     }
 626
 627     pfl->timer = qemu_new_timer_ns(vm_clock, pflash_timer, pfl);
 628     pfl->wcycle = 0;
 629     pfl->cmd = 0;
 630     pfl->status = 0;
 631     /* Hardcoded CFI table (mostly from SG29 Spansion flash) */
 632     pfl->cfi_len = 0x52;
 633     /* Standard "QRY" string */
 634     pfl->cfi_table[0x10] = 'Q';
 635     pfl->cfi_table[0x11] = 'R';
 636     pfl->cfi_table[0x12] = 'Y';
 637     /* Command set (AMD/Fujitsu) */
 638     pfl->cfi_table[0x13] = 0x02;
 639     pfl->cfi_table[0x14] = 0x00;
 640     /* Primary extended table address */
 641     pfl->cfi_table[0x15] = 0x31;
 642     pfl->cfi_table[0x16] = 0x00;
 643     /* Alternate command set (none) */
 644     pfl->cfi_table[0x17] = 0x00;
 645     pfl->cfi_table[0x18] = 0x00;
 646     /* Alternate extended table (none) */
 647     pfl->cfi_table[0x19] = 0x00;
 648     pfl->cfi_table[0x1A] = 0x00;
 649     /* Vcc min */
 650     pfl->cfi_table[0x1B] = 0x27;
 651     /* Vcc max */
 652     pfl->cfi_table[0x1C] = 0x36;
 653     /* Vpp min (no Vpp pin) */
 654     pfl->cfi_table[0x1D] = 0x00;
 655     /* Vpp max (no Vpp pin) */
 656     pfl->cfi_table[0x1E] = 0x00;
 657     /* Reserved */
 658     pfl->cfi_table[0x1F] = 0x07;
 659     /* Timeout for min size buffer write (NA) */
 660     pfl->cfi_table[0x20] = 0x00;
 661     /* Typical timeout for block erase (512 ms) */
 662     pfl->cfi_table[0x21] = 0x09;
 663     /* Typical timeout for full chip erase (4096 ms) */
 664     pfl->cfi_table[0x22] = 0x0C;
 665     /* Reserved */
 666     pfl->cfi_table[0x23] = 0x01;
 667     /* Max timeout for buffer write (NA) */
 668     pfl->cfi_table[0x24] = 0x00;
 669     /* Max timeout for block erase */
 670     pfl->cfi_table[0x25] = 0x0A;
 671     /* Max timeout for chip erase */
 672     pfl->cfi_table[0x26] = 0x0D;
 673     /* Device size */
 674     pfl->cfi_table[0x27] = ctz32(chip_len);
 675     /* Flash device interface (8 & 16 bits) */
 676     pfl->cfi_table[0x28] = 0x02;
 677     pfl->cfi_table[0x29] = 0x00;
 678     /* Max number of bytes in multi-bytes write */
 679     /* XXX: disable buffered write as it's not supported */
 680     //    pfl->cfi_table[0x2A] = 0x05;
 681     pfl->cfi_table[0x2A] = 0x00;
 682     pfl->cfi_table[0x2B] = 0x00;
 683     /* Number of erase block regions (uniform) */
 684     pfl->cfi_table[0x2C] = 0x01;
 685     /* Erase block region 1 */
 686     pfl->cfi_table[0x2D] = pfl->nb_blocs - 1;
 687     pfl->cfi_table[0x2E] = (pfl->nb_blocs - 1) >> 8;
 688     pfl->cfi_table[0x2F] = pfl->sector_len >> 8;
 689     pfl->cfi_table[0x30] = pfl->sector_len >> 16;
 690
 691     /* Extended */
 692     pfl->cfi_table[0x31] = 'P';
 693     pfl->cfi_table[0x32] = 'R';
 694     pfl->cfi_table[0x33] = 'I';
 695
 696     pfl->cfi_table[0x34] = '1';
 697     pfl->cfi_table[0x35] = '0';
 698
 699     pfl->cfi_table[0x36] = 0x00;
 700     pfl->cfi_table[0x37] = 0x00;
 701     pfl->cfi_table[0x38] = 0x00;
 702     pfl->cfi_table[0x39] = 0x00;
 703
 704     pfl->cfi_table[0x3a] = 0x00;
 705
 706     pfl->cfi_table[0x3b] = 0x00;
 707     pfl->cfi_table[0x3c] = 0x00;
 708
 709     return 0;
 710 }
 711
 712 static Property pflash_cfi02_properties[] = {
 713     DEFINE_PROP_DRIVE("drive", struct pflash_t, bs),
 714     DEFINE_PROP_UINT32("num-blocks", struct pflash_t, nb_blocs, 0),
 715     DEFINE_PROP_UINT32("sector-length", struct pflash_t, sector_len, 0),
 716     DEFINE_PROP_UINT8("width", struct pflash_t, width, 0),
 717     DEFINE_PROP_UINT8("mappings", struct pflash_t, mappings, 0),
 718     DEFINE_PROP_UINT8("big-endian", struct pflash_t, be, 0),
 719     DEFINE_PROP_UINT16("id0", struct pflash_t, ident0, 0),
 720     DEFINE_PROP_UINT16("id1", struct pflash_t, ident1, 0),
 721     DEFINE_PROP_UINT16("id2", struct pflash_t, ident2, 0),
 722     DEFINE_PROP_UINT16("id3", struct pflash_t, ident3, 0),
 723     DEFINE_PROP_UINT16("unlock-addr0", struct pflash_t, unlock_addr0, 0),
 724     DEFINE_PROP_UINT16("unlock-addr1", struct pflash_t, unlock_addr1, 0),
 725     DEFINE_PROP_STRING("name", struct pflash_t, name),
 726     DEFINE_PROP_END_OF_LIST(),
 727 };
 728
 729 static void pflash_cfi02_class_init(ObjectClass *klass, void *data)
 730 {
 731     DeviceClass *dc = DEVICE_CLASS(klass);
 732     SysBusDeviceClass *k = SYS_BUS_DEVICE_CLASS(klass);
 733
 734     k->init = pflash_cfi02_init;
 735     dc->props = pflash_cfi02_properties;
 736 }
 737
 738 static const TypeInfo pflash_cfi02_info = {
 739     .name           = "cfi.pflash02",
 740     .parent         = TYPE_SYS_BUS_DEVICE,
 741     .instance_size  = sizeof(struct pflash_t),
 742     .class_init     = pflash_cfi02_class_init,
 743 };
 744
 745 static void pflash_cfi02_register_types(void)
 746 {
 747     type_register_static(&pflash_cfi02_info);
 748 }
 749
 750 type_init(pflash_cfi02_register_types)
 751
 752 pflash_t *pflash_cfi02_register(hwaddr base,
 753                                 DeviceState *qdev, const char *name,
 754                                 hwaddr size,
 755                                 BlockDriverState *bs, uint32_t sector_len,
 756                                 int nb_blocs, int nb_mappings, int width,
 757                                 uint16_t id0, uint16_t id1,
 758                                 uint16_t id2, uint16_t id3,
 759                                 uint16_t unlock_addr0, uint16_t unlock_addr1,
 760                                 int be)
 761 {
 762     DeviceState *dev = qdev_create(NULL, "cfi.pflash02");
 763     SysBusDevice *busdev = sysbus_from_qdev(dev);
 764     pflash_t *pfl = (pflash_t *)object_dynamic_cast(OBJECT(dev),
 765                                                     "cfi.pflash02");
 766
 767     if (bs && qdev_prop_set_drive(dev, "drive", bs)) {
 768         abort();
 769     }
 770     qdev_prop_set_uint32(dev, "num-blocks", nb_blocs);
 771     qdev_prop_set_uint32(dev, "sector-length", sector_len);
 772     qdev_prop_set_uint8(dev, "width", width);
 773     qdev_prop_set_uint8(dev, "mappings", nb_mappings);
 774     qdev_prop_set_uint8(dev, "big-endian", !!be);
 775     qdev_prop_set_uint16(dev, "id0", id0);
 776     qdev_prop_set_uint16(dev, "id1", id1);
 777     qdev_prop_set_uint16(dev, "id2", id2);
 778     qdev_prop_set_uint16(dev, "id3", id3);
 779     qdev_prop_set_uint16(dev, "unlock-addr0", unlock_addr0);
 780     qdev_prop_set_uint16(dev, "unlock-addr1", unlock_addr1);
 781     qdev_prop_set_string(dev, "name", name);
 782     qdev_init_nofail(dev);
 783
 784     sysbus_mmio_map(busdev, 0, base);
 785     return pfl;
 786 }