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         /* fall through to the read code */
 161     case 0x80:
 162         /* We accept reads during second unlock sequence... */
 163     case 0x00:
 164     flash_read:
 165         /* Flash area read */
 166         p = pfl->storage;
 167         switch (width) {
 168         case 1:
 169             ret = p[offset];
 170 //            DPRINTF("%s: data offset %08x %02x\n", __func__, offset, ret);
 171             break;
 172         case 2:
 173             if (be) {
 174                 ret = p[offset] << 8;
 175                 ret |= p[offset + 1];
 176             } else {
 177                 ret = p[offset];
 178                 ret |= p[offset + 1] << 8;
 179             }
 180 //            DPRINTF("%s: data offset %08x %04x\n", __func__, offset, ret);
 181             break;
 182         case 4:
 183             if (be) {
 184                 ret = p[offset] << 24;
 185                 ret |= p[offset + 1] << 16;
 186                 ret |= p[offset + 2] << 8;
 187                 ret |= p[offset + 3];
 188             } else {
 189                 ret = p[offset];
 190                 ret |= p[offset + 1] << 8;
 191                 ret |= p[offset + 2] << 16;
 192                 ret |= p[offset + 3] << 24;
 193             }
 194 //            DPRINTF("%s: data offset %08x %08x\n", __func__, offset, ret);
 195             break;
 196         }
 197         break;
 198     case 0x90:
 199         /* flash ID read */
 200         switch (boff) {
 201         case 0x00:
 202         case 0x01:
 203             ret = boff & 0x01 ? pfl->ident1 : pfl->ident0;
 204             break;
 205         case 0x02:
 206             ret = 0x00; /* Pretend all sectors are unprotected */
 207             break;
 208         case 0x0E:
 209         case 0x0F:
 210             ret = boff & 0x01 ? pfl->ident3 : pfl->ident2;
 211             if (ret == (uint8_t)-1) {
 212                 goto flash_read;
 213             }
 214             break;
 215         default:
 216             goto flash_read;
 217         }
 218         DPRINTF("%s: ID " TARGET_FMT_plx " %x\n", __func__, boff, ret);
 219         break;
 220     case 0xA0:
 221     case 0x10:
 222     case 0x30:
 223         /* Status register read */
 224         ret = pfl->status;
 225         DPRINTF("%s: status %x\n", __func__, ret);
 226         /* Toggle bit 6 */
 227         pfl->status ^= 0x40;
 228         break;
 229     case 0x98:
 230         /* CFI query mode */
 231         if (boff > pfl->cfi_len)
 232             ret = 0;
 233         else
 234             ret = pfl->cfi_table[boff];
 235         break;
 236     }
 237
 238     return ret;
 239 }
 240
 241 /* update flash content on disk */
 242 static void pflash_update(pflash_t *pfl, int offset,
 243                           int size)
 244 {
 245     int offset_end;
 246     if (pfl->bs) {
 247         offset_end = offset + size;
 248         /* round to sectors */
 249         offset = offset >> 9;
 250         offset_end = (offset_end + 511) >> 9;
 251         bdrv_write(pfl->bs, offset, pfl->storage + (offset << 9),
 252                    offset_end - offset);
 253     }
 254 }
 255
 256 static void pflash_write (pflash_t *pfl, hwaddr offset,
 257                           uint32_t value, int width, int be)
 258 {
 259     hwaddr boff;
 260     uint8_t *p;
 261     uint8_t cmd;
 262
 263     cmd = value;
 264     if (pfl->cmd != 0xA0 && cmd == 0xF0) {
 265 #if 0
 266         DPRINTF("%s: flash reset asked (%02x %02x)\n",
 267                 __func__, pfl->cmd, cmd);
 268 #endif
 269         goto reset_flash;
 270     }
 271     DPRINTF("%s: offset " TARGET_FMT_plx " %08x %d %d\n", __func__,
 272             offset, value, width, pfl->wcycle);
 273     offset &= pfl->chip_len - 1;
 274
 275     DPRINTF("%s: offset " TARGET_FMT_plx " %08x %d\n", __func__,
 276             offset, value, width);
 277     boff = offset & (pfl->sector_len - 1);
 278     if (pfl->width == 2)
 279         boff = boff >> 1;
 280     else if (pfl->width == 4)
 281         boff = boff >> 2;
 282     switch (pfl->wcycle) {
 283     case 0:
 284         /* Set the device in I/O access mode if required */
 285         if (pfl->rom_mode)
 286             pflash_register_memory(pfl, 0);
 287         pfl->read_counter = 0;
 288         /* We're in read mode */
 289     check_unlock0:
 290         if (boff == 0x55 && cmd == 0x98) {
 291         enter_CFI_mode:
 292             /* Enter CFI query mode */
 293             pfl->wcycle = 7;
 294             pfl->cmd = 0x98;
 295             return;
 296         }
 297         if (boff != pfl->unlock_addr0 || cmd != 0xAA) {
 298             DPRINTF("%s: unlock0 failed " TARGET_FMT_plx " %02x %04x\n",
 299                     __func__, boff, cmd, pfl->unlock_addr0);
 300             goto reset_flash;
 301         }
 302         DPRINTF("%s: unlock sequence started\n", __func__);
 303         break;
 304     case 1:
 305         /* We started an unlock sequence */
 306     check_unlock1:
 307         if (boff != pfl->unlock_addr1 || cmd != 0x55) {
 308             DPRINTF("%s: unlock1 failed " TARGET_FMT_plx " %02x\n", __func__,
 309                     boff, cmd);
 310             goto reset_flash;
 311         }
 312         DPRINTF("%s: unlock sequence done\n", __func__);
 313         break;
 314     case 2:
 315         /* We finished an unlock sequence */
 316         if (!pfl->bypass && boff != pfl->unlock_addr0) {
 317             DPRINTF("%s: command failed " TARGET_FMT_plx " %02x\n", __func__,
 318                     boff, cmd);
 319             goto reset_flash;
 320         }
 321         switch (cmd) {
 322         case 0x20:
 323             pfl->bypass = 1;
 324             goto do_bypass;
 325         case 0x80:
 326         case 0x90:
 327         case 0xA0:
 328             pfl->cmd = cmd;
 329             DPRINTF("%s: starting command %02x\n", __func__, cmd);
 330             break;
 331         default:
 332             DPRINTF("%s: unknown command %02x\n", __func__, cmd);
 333             goto reset_flash;
 334         }
 335         break;
 336     case 3:
 337         switch (pfl->cmd) {
 338         case 0x80:
 339             /* We need another unlock sequence */
 340             goto check_unlock0;
 341         case 0xA0:
 342             DPRINTF("%s: write data offset " TARGET_FMT_plx " %08x %d\n",
 343                     __func__, offset, value, width);
 344             p = pfl->storage;
 345             if (!pfl->ro) {
 346                 switch (width) {
 347                 case 1:
 348                     p[offset] &= value;
 349                     pflash_update(pfl, offset, 1);
 350                     break;
 351                 case 2:
 352                     if (be) {
 353                         p[offset] &= value >> 8;
 354                         p[offset + 1] &= value;
 355                     } else {
 356                         p[offset] &= value;
 357                         p[offset + 1] &= value >> 8;
 358                     }
 359                     pflash_update(pfl, offset, 2);
 360                     break;
 361                 case 4:
 362                     if (be) {
 363                         p[offset] &= value >> 24;
 364                         p[offset + 1] &= value >> 16;
 365                         p[offset + 2] &= value >> 8;
 366                         p[offset + 3] &= value;
 367                     } else {
 368                         p[offset] &= value;
 369                         p[offset + 1] &= value >> 8;
 370                         p[offset + 2] &= value >> 16;
 371                         p[offset + 3] &= value >> 24;
 372                     }
 373                     pflash_update(pfl, offset, 4);
 374                     break;
 375                 }
 376             }
 377             pfl->status = 0x00 | ~(value & 0x80);
 378             /* Let's pretend write is immediate */
 379             if (pfl->bypass)
 380                 goto do_bypass;
 381             goto reset_flash;
 382         case 0x90:
 383             if (pfl->bypass && cmd == 0x00) {
 384                 /* Unlock bypass reset */
 385                 goto reset_flash;
 386             }
 387             /* We can enter CFI query mode from autoselect mode */
 388             if (boff == 0x55 && cmd == 0x98)
 389                 goto enter_CFI_mode;
 390             /* No break here */
 391         default:
 392             DPRINTF("%s: invalid write for command %02x\n",
 393                     __func__, pfl->cmd);
 394             goto reset_flash;
 395         }
 396     case 4:
 397         switch (pfl->cmd) {
 398         case 0xA0:
 399             /* Ignore writes while flash data write is occurring */
 400             /* As we suppose write is immediate, this should never happen */
 401             return;
 402         case 0x80:
 403             goto check_unlock1;
 404         default:
 405             /* Should never happen */
 406             DPRINTF("%s: invalid command state %02x (wc 4)\n",
 407                     __func__, pfl->cmd);
 408             goto reset_flash;
 409         }
 410         break;
 411     case 5:
 412         switch (cmd) {
 413         case 0x10:
 414             if (boff != pfl->unlock_addr0) {
 415                 DPRINTF("%s: chip erase: invalid address " TARGET_FMT_plx "\n",
 416                         __func__, offset);
 417                 goto reset_flash;
 418             }
 419             /* Chip erase */
 420             DPRINTF("%s: start chip erase\n", __func__);
 421             if (!pfl->ro) {
 422                 memset(pfl->storage, 0xFF, pfl->chip_len);
 423                 pflash_update(pfl, 0, pfl->chip_len);
 424             }
 425             pfl->status = 0x00;
 426             /* Let's wait 5 seconds before chip erase is done */
 427             qemu_mod_timer(pfl->timer,
 428                            qemu_get_clock_ns(vm_clock) + (get_ticks_per_sec() * 5));
 429             break;
 430         case 0x30:
 431             /* Sector erase */
 432             p = pfl->storage;
 433             offset &= ~(pfl->sector_len - 1);
 434             DPRINTF("%s: start sector erase at " TARGET_FMT_plx "\n", __func__,
 435                     offset);
 436             if (!pfl->ro) {
 437                 memset(p + offset, 0xFF, pfl->sector_len);
 438                 pflash_update(pfl, offset, pfl->sector_len);
 439             }
 440             pfl->status = 0x00;
 441             /* Let's wait 1/2 second before sector erase is done */
 442             qemu_mod_timer(pfl->timer,
 443                            qemu_get_clock_ns(vm_clock) + (get_ticks_per_sec() / 2));
 444             break;
 445         default:
 446             DPRINTF("%s: invalid command %02x (wc 5)\n", __func__, cmd);
 447             goto reset_flash;
 448         }
 449         pfl->cmd = cmd;
 450         break;
 451     case 6:
 452         switch (pfl->cmd) {
 453         case 0x10:
 454             /* Ignore writes during chip erase */
 455             return;
 456         case 0x30:
 457             /* Ignore writes during sector erase */
 458             return;
 459         default:
 460             /* Should never happen */
 461             DPRINTF("%s: invalid command state %02x (wc 6)\n",
 462                     __func__, pfl->cmd);
 463             goto reset_flash;
 464         }
 465         break;
 466     case 7: /* Special value for CFI queries */
 467         DPRINTF("%s: invalid write in CFI query mode\n", __func__);
 468         goto reset_flash;
 469     default:
 470         /* Should never happen */
 471         DPRINTF("%s: invalid write state (wc 7)\n",  __func__);
 472         goto reset_flash;
 473     }
 474     pfl->wcycle++;
 475
 476     return;
 477
 478     /* Reset flash */
 479  reset_flash:
 480     pfl->bypass = 0;
 481     pfl->wcycle = 0;
 482     pfl->cmd = 0;
 483     return;
 484
 485  do_bypass:
 486     pfl->wcycle = 2;
 487     pfl->cmd = 0;
 488 }
 489
 490
 491 static uint32_t pflash_readb_be(void *opaque, hwaddr addr)
 492 {
 493     return pflash_read(opaque, addr, 1, 1);
 494 }
 495
 496 static uint32_t pflash_readb_le(void *opaque, hwaddr addr)
 497 {
 498     return pflash_read(opaque, addr, 1, 0);
 499 }
 500
 501 static uint32_t pflash_readw_be(void *opaque, hwaddr addr)
 502 {
 503     pflash_t *pfl = opaque;
 504
 505     return pflash_read(pfl, addr, 2, 1);
 506 }
 507
 508 static uint32_t pflash_readw_le(void *opaque, hwaddr addr)
 509 {
 510     pflash_t *pfl = opaque;
 511
 512     return pflash_read(pfl, addr, 2, 0);
 513 }
 514
 515 static uint32_t pflash_readl_be(void *opaque, hwaddr addr)
 516 {
 517     pflash_t *pfl = opaque;
 518
 519     return pflash_read(pfl, addr, 4, 1);
 520 }
 521
 522 static uint32_t pflash_readl_le(void *opaque, hwaddr addr)
 523 {
 524     pflash_t *pfl = opaque;
 525
 526     return pflash_read(pfl, addr, 4, 0);
 527 }
 528
 529 static void pflash_writeb_be(void *opaque, hwaddr addr,
 530                              uint32_t value)
 531 {
 532     pflash_write(opaque, addr, value, 1, 1);
 533 }
 534
 535 static void pflash_writeb_le(void *opaque, hwaddr addr,
 536                              uint32_t value)
 537 {
 538     pflash_write(opaque, addr, value, 1, 0);
 539 }
 540
 541 static void pflash_writew_be(void *opaque, hwaddr addr,
 542                              uint32_t value)
 543 {
 544     pflash_t *pfl = opaque;
 545
 546     pflash_write(pfl, addr, value, 2, 1);
 547 }
 548
 549 static void pflash_writew_le(void *opaque, hwaddr addr,
 550                              uint32_t value)
 551 {
 552     pflash_t *pfl = opaque;
 553
 554     pflash_write(pfl, addr, value, 2, 0);
 555 }
 556
 557 static void pflash_writel_be(void *opaque, hwaddr addr,
 558                              uint32_t value)
 559 {
 560     pflash_t *pfl = opaque;
 561
 562     pflash_write(pfl, addr, value, 4, 1);
 563 }
 564
 565 static void pflash_writel_le(void *opaque, hwaddr addr,
 566                              uint32_t value)
 567 {
 568     pflash_t *pfl = opaque;
 569
 570     pflash_write(pfl, addr, value, 4, 0);
 571 }
 572
 573 static const MemoryRegionOps pflash_cfi02_ops_be = {
 574     .old_mmio = {
 575         .read = { pflash_readb_be, pflash_readw_be, pflash_readl_be, },
 576         .write = { pflash_writeb_be, pflash_writew_be, pflash_writel_be, },
 577     },
 578     .endianness = DEVICE_NATIVE_ENDIAN,
 579 };
 580
 581 static const MemoryRegionOps pflash_cfi02_ops_le = {
 582     .old_mmio = {
 583         .read = { pflash_readb_le, pflash_readw_le, pflash_readl_le, },
 584         .write = { pflash_writeb_le, pflash_writew_le, pflash_writel_le, },
 585     },
 586     .endianness = DEVICE_NATIVE_ENDIAN,
 587 };
 588
 589 static int pflash_cfi02_init(SysBusDevice *dev)
 590 {
 591     pflash_t *pfl = FROM_SYSBUS(typeof(*pfl), dev);
 592     uint32_t chip_len;
 593     int ret;
 594
 595     chip_len = pfl->sector_len * pfl->nb_blocs;
 596     /* XXX: to be fixed */
 597 #if 0
 598     if (total_len != (8 * 1024 * 1024) && total_len != (16 * 1024 * 1024) &&
 599         total_len != (32 * 1024 * 1024) && total_len != (64 * 1024 * 1024))
 600         return NULL;
 601 #endif
 602
 603     memory_region_init_rom_device(&pfl->orig_mem, pfl->be ?
 604                                   &pflash_cfi02_ops_be : &pflash_cfi02_ops_le,
 605                                   pfl, pfl->name, chip_len);
 606     vmstate_register_ram(&pfl->orig_mem, DEVICE(pfl));
 607     pfl->storage = memory_region_get_ram_ptr(&pfl->orig_mem);
 608     pfl->chip_len = chip_len;
 609     if (pfl->bs) {
 610         /* read the initial flash content */
 611         ret = bdrv_read(pfl->bs, 0, pfl->storage, chip_len >> 9);
 612         if (ret < 0) {
 613             g_free(pfl);
 614             return 1;
 615         }
 616     }
 617
 618     pflash_setup_mappings(pfl);
 619     pfl->rom_mode = 1;
 620     sysbus_init_mmio(dev, &pfl->mem);
 621
 622     if (pfl->bs) {
 623         pfl->ro = bdrv_is_read_only(pfl->bs);
 624     } else {
 625         pfl->ro = 0;
 626     }
 627
 628     pfl->timer = qemu_new_timer_ns(vm_clock, pflash_timer, pfl);
 629     pfl->wcycle = 0;
 630     pfl->cmd = 0;
 631     pfl->status = 0;
 632     /* Hardcoded CFI table (mostly from SG29 Spansion flash) */
 633     pfl->cfi_len = 0x52;
 634     /* Standard "QRY" string */
 635     pfl->cfi_table[0x10] = 'Q';
 636     pfl->cfi_table[0x11] = 'R';
 637     pfl->cfi_table[0x12] = 'Y';
 638     /* Command set (AMD/Fujitsu) */
 639     pfl->cfi_table[0x13] = 0x02;
 640     pfl->cfi_table[0x14] = 0x00;
 641     /* Primary extended table address */
 642     pfl->cfi_table[0x15] = 0x31;
 643     pfl->cfi_table[0x16] = 0x00;
 644     /* Alternate command set (none) */
 645     pfl->cfi_table[0x17] = 0x00;
 646     pfl->cfi_table[0x18] = 0x00;
 647     /* Alternate extended table (none) */
 648     pfl->cfi_table[0x19] = 0x00;
 649     pfl->cfi_table[0x1A] = 0x00;
 650     /* Vcc min */
 651     pfl->cfi_table[0x1B] = 0x27;
 652     /* Vcc max */
 653     pfl->cfi_table[0x1C] = 0x36;
 654     /* Vpp min (no Vpp pin) */
 655     pfl->cfi_table[0x1D] = 0x00;
 656     /* Vpp max (no Vpp pin) */
 657     pfl->cfi_table[0x1E] = 0x00;
 658     /* Reserved */
 659     pfl->cfi_table[0x1F] = 0x07;
 660     /* Timeout for min size buffer write (NA) */
 661     pfl->cfi_table[0x20] = 0x00;
 662     /* Typical timeout for block erase (512 ms) */
 663     pfl->cfi_table[0x21] = 0x09;
 664     /* Typical timeout for full chip erase (4096 ms) */
 665     pfl->cfi_table[0x22] = 0x0C;
 666     /* Reserved */
 667     pfl->cfi_table[0x23] = 0x01;
 668     /* Max timeout for buffer write (NA) */
 669     pfl->cfi_table[0x24] = 0x00;
 670     /* Max timeout for block erase */
 671     pfl->cfi_table[0x25] = 0x0A;
 672     /* Max timeout for chip erase */
 673     pfl->cfi_table[0x26] = 0x0D;
 674     /* Device size */
 675     pfl->cfi_table[0x27] = ctz32(chip_len);
 676     /* Flash device interface (8 & 16 bits) */
 677     pfl->cfi_table[0x28] = 0x02;
 678     pfl->cfi_table[0x29] = 0x00;
 679     /* Max number of bytes in multi-bytes write */
 680     /* XXX: disable buffered write as it's not supported */
 681     //    pfl->cfi_table[0x2A] = 0x05;
 682     pfl->cfi_table[0x2A] = 0x00;
 683     pfl->cfi_table[0x2B] = 0x00;
 684     /* Number of erase block regions (uniform) */
 685     pfl->cfi_table[0x2C] = 0x01;
 686     /* Erase block region 1 */
 687     pfl->cfi_table[0x2D] = pfl->nb_blocs - 1;
 688     pfl->cfi_table[0x2E] = (pfl->nb_blocs - 1) >> 8;
 689     pfl->cfi_table[0x2F] = pfl->sector_len >> 8;
 690     pfl->cfi_table[0x30] = pfl->sector_len >> 16;
 691
 692     /* Extended */
 693     pfl->cfi_table[0x31] = 'P';
 694     pfl->cfi_table[0x32] = 'R';
 695     pfl->cfi_table[0x33] = 'I';
 696
 697     pfl->cfi_table[0x34] = '1';
 698     pfl->cfi_table[0x35] = '0';
 699
 700     pfl->cfi_table[0x36] = 0x00;
 701     pfl->cfi_table[0x37] = 0x00;
 702     pfl->cfi_table[0x38] = 0x00;
 703     pfl->cfi_table[0x39] = 0x00;
 704
 705     pfl->cfi_table[0x3a] = 0x00;
 706
 707     pfl->cfi_table[0x3b] = 0x00;
 708     pfl->cfi_table[0x3c] = 0x00;
 709
 710     return 0;
 711 }
 712
 713 static Property pflash_cfi02_properties[] = {
 714     DEFINE_PROP_DRIVE("drive", struct pflash_t, bs),
 715     DEFINE_PROP_UINT32("num-blocks", struct pflash_t, nb_blocs, 0),
 716     DEFINE_PROP_UINT32("sector-length", struct pflash_t, sector_len, 0),
 717     DEFINE_PROP_UINT8("width", struct pflash_t, width, 0),
 718     DEFINE_PROP_UINT8("mappings", struct pflash_t, mappings, 0),
 719     DEFINE_PROP_UINT8("big-endian", struct pflash_t, be, 0),
 720     DEFINE_PROP_UINT16("id0", struct pflash_t, ident0, 0),
 721     DEFINE_PROP_UINT16("id1", struct pflash_t, ident1, 0),
 722     DEFINE_PROP_UINT16("id2", struct pflash_t, ident2, 0),
 723     DEFINE_PROP_UINT16("id3", struct pflash_t, ident3, 0),
 724     DEFINE_PROP_UINT16("unlock-addr0", struct pflash_t, unlock_addr0, 0),
 725     DEFINE_PROP_UINT16("unlock-addr1", struct pflash_t, unlock_addr1, 0),
 726     DEFINE_PROP_STRING("name", struct pflash_t, name),
 727     DEFINE_PROP_END_OF_LIST(),
 728 };
 729
 730 static void pflash_cfi02_class_init(ObjectClass *klass, void *data)
 731 {
 732     DeviceClass *dc = DEVICE_CLASS(klass);
 733     SysBusDeviceClass *k = SYS_BUS_DEVICE_CLASS(klass);
 734
 735     k->init = pflash_cfi02_init;
 736     dc->props = pflash_cfi02_properties;
 737 }
 738
 739 static const TypeInfo pflash_cfi02_info = {
 740     .name           = "cfi.pflash02",
 741     .parent         = TYPE_SYS_BUS_DEVICE,
 742     .instance_size  = sizeof(struct pflash_t),
 743     .class_init     = pflash_cfi02_class_init,
 744 };
 745
 746 static void pflash_cfi02_register_types(void)
 747 {
 748     type_register_static(&pflash_cfi02_info);
 749 }
 750
 751 type_init(pflash_cfi02_register_types)
 752
 753 pflash_t *pflash_cfi02_register(hwaddr base,
 754                                 DeviceState *qdev, const char *name,
 755                                 hwaddr size,
 756                                 BlockDriverState *bs, uint32_t sector_len,
 757                                 int nb_blocs, int nb_mappings, int width,
 758                                 uint16_t id0, uint16_t id1,
 759                                 uint16_t id2, uint16_t id3,
 760                                 uint16_t unlock_addr0, uint16_t unlock_addr1,
 761                                 int be)
 762 {
 763     DeviceState *dev = qdev_create(NULL, "cfi.pflash02");
 764     SysBusDevice *busdev = SYS_BUS_DEVICE(dev);
 765     pflash_t *pfl = (pflash_t *)object_dynamic_cast(OBJECT(dev),
 766                                                     "cfi.pflash02");
 767
 768     if (bs && qdev_prop_set_drive(dev, "drive", bs)) {
 769         abort();
 770     }
 771     qdev_prop_set_uint32(dev, "num-blocks", nb_blocs);
 772     qdev_prop_set_uint32(dev, "sector-length", sector_len);
 773     qdev_prop_set_uint8(dev, "width", width);
 774     qdev_prop_set_uint8(dev, "mappings", nb_mappings);
 775     qdev_prop_set_uint8(dev, "big-endian", !!be);
 776     qdev_prop_set_uint16(dev, "id0", id0);
 777     qdev_prop_set_uint16(dev, "id1", id1);
 778     qdev_prop_set_uint16(dev, "id2", id2);
 779     qdev_prop_set_uint16(dev, "id3", id3);
 780     qdev_prop_set_uint16(dev, "unlock-addr0", unlock_addr0);
 781     qdev_prop_set_uint16(dev, "unlock-addr1", unlock_addr1);
 782     qdev_prop_set_string(dev, "name", name);
 783     qdev_init_nofail(dev);
 784
 785     sysbus_mmio_map(busdev, 0, base);
 786     return pfl;
 787 }