hw/block/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 "qemu/osdep.h"
  39 #include "hw/hw.h"
  40 #include "hw/block/flash.h"
  41 #include "qapi/error.h"
  42 #include "qemu/timer.h"
  43 #include "sysemu/block-backend.h"
  44 #include "exec/address-spaces.h"
  45 #include "qemu/host-utils.h"
  46 #include "hw/sysbus.h"
  47
  48 //#define PFLASH_DEBUG
  49 #ifdef PFLASH_DEBUG
  50 #define DPRINTF(fmt, ...)                                  \
  51 do {                                                       \
  52     fprintf(stderr, "PFLASH: " fmt , ## __VA_ARGS__);       \
  53 } while (0)
  54 #else
  55 #define DPRINTF(fmt, ...) do { } while (0)
  56 #endif
  57
  58 #define PFLASH_LAZY_ROMD_THRESHOLD 42
  59
  60 #define CFI_PFLASH02(obj) OBJECT_CHECK(pflash_t, (obj), TYPE_CFI_PFLASH02)
  61
  62 struct pflash_t {
  63     /*< private >*/
  64     SysBusDevice parent_obj;
  65     /*< public >*/
  66
  67     BlockBackend *blk;
  68     uint32_t sector_len;
  69     uint32_t nb_blocs;
  70     uint32_t chip_len;
  71     uint8_t mappings;
  72     uint8_t width;
  73     uint8_t be;
  74     int wcycle; /* if 0, the flash is read normally */
  75     int bypass;
  76     int ro;
  77     uint8_t cmd;
  78     uint8_t status;
  79     /* FIXME: implement array device properties */
  80     uint16_t ident0;
  81     uint16_t ident1;
  82     uint16_t ident2;
  83     uint16_t ident3;
  84     uint16_t unlock_addr0;
  85     uint16_t unlock_addr1;
  86     uint8_t cfi_len;
  87     uint8_t cfi_table[0x52];
  88     QEMUTimer *timer;
  89     /* The device replicates the flash memory across its memory space.  Emulate
  90      * that by having a container (.mem) filled with an array of aliases
  91      * (.mem_mappings) pointing to the flash memory (.orig_mem).
  92      */
  93     MemoryRegion mem;
  94     MemoryRegion *mem_mappings;    /* array; one per mapping */
  95     MemoryRegion orig_mem;
  96     int rom_mode;
  97     int read_counter; /* used for lazy switch-back to rom mode */
  98     char *name;
  99     void *storage;
 100 };
 101
 102 /*
 103  * Set up replicated mappings of the same region.
 104  */
 105 static void pflash_setup_mappings(pflash_t *pfl)
 106 {
 107     unsigned i;
 108     hwaddr size = memory_region_size(&pfl->orig_mem);
 109
 110     memory_region_init(&pfl->mem, OBJECT(pfl), "pflash", pfl->mappings * size);
 111     pfl->mem_mappings = g_new(MemoryRegion, pfl->mappings);
 112     for (i = 0; i < pfl->mappings; ++i) {
 113         memory_region_init_alias(&pfl->mem_mappings[i], OBJECT(pfl),
 114                                  "pflash-alias", &pfl->orig_mem, 0, size);
 115         memory_region_add_subregion(&pfl->mem, i * size, &pfl->mem_mappings[i]);
 116     }
 117 }
 118
 119 static void pflash_register_memory(pflash_t *pfl, int rom_mode)
 120 {
 121     memory_region_rom_device_set_romd(&pfl->orig_mem, rom_mode);
 122     pfl->rom_mode = rom_mode;
 123 }
 124
 125 static void pflash_timer (void *opaque)
 126 {
 127     pflash_t *pfl = opaque;
 128
 129     DPRINTF("%s: command %02x done\n", __func__, pfl->cmd);
 130     /* Reset flash */
 131     pfl->status ^= 0x80;
 132     if (pfl->bypass) {
 133         pfl->wcycle = 2;
 134     } else {
 135         pflash_register_memory(pfl, 1);
 136         pfl->wcycle = 0;
 137     }
 138     pfl->cmd = 0;
 139 }
 140
 141 static uint32_t pflash_read (pflash_t *pfl, hwaddr offset,
 142                              int width, int be)
 143 {
 144     hwaddr boff;
 145     uint32_t ret;
 146     uint8_t *p;
 147
 148     DPRINTF("%s: offset " TARGET_FMT_plx "\n", __func__, offset);
 149     ret = -1;
 150     /* Lazy reset to ROMD mode after a certain amount of read accesses */
 151     if (!pfl->rom_mode && pfl->wcycle == 0 &&
 152         ++pfl->read_counter > PFLASH_LAZY_ROMD_THRESHOLD) {
 153         pflash_register_memory(pfl, 1);
 154     }
 155     offset &= pfl->chip_len - 1;
 156     boff = offset & 0xFF;
 157     if (pfl->width == 2)
 158         boff = boff >> 1;
 159     else if (pfl->width == 4)
 160         boff = boff >> 2;
 161     switch (pfl->cmd) {
 162     default:
 163         /* This should never happen : reset state & treat it as a read*/
 164         DPRINTF("%s: unknown command state: %x\n", __func__, pfl->cmd);
 165         pfl->wcycle = 0;
 166         pfl->cmd = 0;
 167         /* fall through to the read code */
 168     case 0x80:
 169         /* We accept reads during second unlock sequence... */
 170     case 0x00:
 171     flash_read:
 172         /* Flash area read */
 173         p = pfl->storage;
 174         switch (width) {
 175         case 1:
 176             ret = p[offset];
 177 //            DPRINTF("%s: data offset %08x %02x\n", __func__, offset, ret);
 178             break;
 179         case 2:
 180             if (be) {
 181                 ret = p[offset] << 8;
 182                 ret |= p[offset + 1];
 183             } else {
 184                 ret = p[offset];
 185                 ret |= p[offset + 1] << 8;
 186             }
 187 //            DPRINTF("%s: data offset %08x %04x\n", __func__, offset, ret);
 188             break;
 189         case 4:
 190             if (be) {
 191                 ret = p[offset] << 24;
 192                 ret |= p[offset + 1] << 16;
 193                 ret |= p[offset + 2] << 8;
 194                 ret |= p[offset + 3];
 195             } else {
 196                 ret = p[offset];
 197                 ret |= p[offset + 1] << 8;
 198                 ret |= p[offset + 2] << 16;
 199                 ret |= p[offset + 3] << 24;
 200             }
 201 //            DPRINTF("%s: data offset %08x %08x\n", __func__, offset, ret);
 202             break;
 203         }
 204         break;
 205     case 0x90:
 206         /* flash ID read */
 207         switch (boff) {
 208         case 0x00:
 209         case 0x01:
 210             ret = boff & 0x01 ? pfl->ident1 : pfl->ident0;
 211             break;
 212         case 0x02:
 213             ret = 0x00; /* Pretend all sectors are unprotected */
 214             break;
 215         case 0x0E:
 216         case 0x0F:
 217             ret = boff & 0x01 ? pfl->ident3 : pfl->ident2;
 218             if (ret == (uint8_t)-1) {
 219                 goto flash_read;
 220             }
 221             break;
 222         default:
 223             goto flash_read;
 224         }
 225         DPRINTF("%s: ID " TARGET_FMT_plx " %x\n", __func__, boff, ret);
 226         break;
 227     case 0xA0:
 228     case 0x10:
 229     case 0x30:
 230         /* Status register read */
 231         ret = pfl->status;
 232         DPRINTF("%s: status %x\n", __func__, ret);
 233         /* Toggle bit 6 */
 234         pfl->status ^= 0x40;
 235         break;
 236     case 0x98:
 237         /* CFI query mode */
 238         if (boff > pfl->cfi_len)
 239             ret = 0;
 240         else
 241             ret = pfl->cfi_table[boff];
 242         break;
 243     }
 244
 245     return ret;
 246 }
 247
 248 /* update flash content on disk */
 249 static void pflash_update(pflash_t *pfl, int offset,
 250                           int size)
 251 {
 252     int offset_end;
 253     if (pfl->blk) {
 254         offset_end = offset + size;
 255         /* widen to sector boundaries */
 256         offset = QEMU_ALIGN_DOWN(offset, BDRV_SECTOR_SIZE);
 257         offset_end = QEMU_ALIGN_UP(offset_end, BDRV_SECTOR_SIZE);
 258         blk_pwrite(pfl->blk, offset, pfl->storage + offset,
 259                    offset_end - offset, 0);
 260     }
 261 }
 262
 263 static void pflash_write (pflash_t *pfl, hwaddr offset,
 264                           uint32_t value, int width, int be)
 265 {
 266     hwaddr boff;
 267     uint8_t *p;
 268     uint8_t cmd;
 269
 270     cmd = value;
 271     if (pfl->cmd != 0xA0 && cmd == 0xF0) {
 272 #if 0
 273         DPRINTF("%s: flash reset asked (%02x %02x)\n",
 274                 __func__, pfl->cmd, cmd);
 275 #endif
 276         goto reset_flash;
 277     }
 278     DPRINTF("%s: offset " TARGET_FMT_plx " %08x %d %d\n", __func__,
 279             offset, value, width, pfl->wcycle);
 280     offset &= pfl->chip_len - 1;
 281
 282     DPRINTF("%s: offset " TARGET_FMT_plx " %08x %d\n", __func__,
 283             offset, value, width);
 284     boff = offset & (pfl->sector_len - 1);
 285     if (pfl->width == 2)
 286         boff = boff >> 1;
 287     else if (pfl->width == 4)
 288         boff = boff >> 2;
 289     switch (pfl->wcycle) {
 290     case 0:
 291         /* Set the device in I/O access mode if required */
 292         if (pfl->rom_mode)
 293             pflash_register_memory(pfl, 0);
 294         pfl->read_counter = 0;
 295         /* We're in read mode */
 296     check_unlock0:
 297         if (boff == 0x55 && cmd == 0x98) {
 298         enter_CFI_mode:
 299             /* Enter CFI query mode */
 300             pfl->wcycle = 7;
 301             pfl->cmd = 0x98;
 302             return;
 303         }
 304         if (boff != pfl->unlock_addr0 || cmd != 0xAA) {
 305             DPRINTF("%s: unlock0 failed " TARGET_FMT_plx " %02x %04x\n",
 306                     __func__, boff, cmd, pfl->unlock_addr0);
 307             goto reset_flash;
 308         }
 309         DPRINTF("%s: unlock sequence started\n", __func__);
 310         break;
 311     case 1:
 312         /* We started an unlock sequence */
 313     check_unlock1:
 314         if (boff != pfl->unlock_addr1 || cmd != 0x55) {
 315             DPRINTF("%s: unlock1 failed " TARGET_FMT_plx " %02x\n", __func__,
 316                     boff, cmd);
 317             goto reset_flash;
 318         }
 319         DPRINTF("%s: unlock sequence done\n", __func__);
 320         break;
 321     case 2:
 322         /* We finished an unlock sequence */
 323         if (!pfl->bypass && boff != pfl->unlock_addr0) {
 324             DPRINTF("%s: command failed " TARGET_FMT_plx " %02x\n", __func__,
 325                     boff, cmd);
 326             goto reset_flash;
 327         }
 328         switch (cmd) {
 329         case 0x20:
 330             pfl->bypass = 1;
 331             goto do_bypass;
 332         case 0x80:
 333         case 0x90:
 334         case 0xA0:
 335             pfl->cmd = cmd;
 336             DPRINTF("%s: starting command %02x\n", __func__, cmd);
 337             break;
 338         default:
 339             DPRINTF("%s: unknown command %02x\n", __func__, cmd);
 340             goto reset_flash;
 341         }
 342         break;
 343     case 3:
 344         switch (pfl->cmd) {
 345         case 0x80:
 346             /* We need another unlock sequence */
 347             goto check_unlock0;
 348         case 0xA0:
 349             DPRINTF("%s: write data offset " TARGET_FMT_plx " %08x %d\n",
 350                     __func__, offset, value, width);
 351             p = pfl->storage;
 352             if (!pfl->ro) {
 353                 switch (width) {
 354                 case 1:
 355                     p[offset] &= value;
 356                     pflash_update(pfl, offset, 1);
 357                     break;
 358                 case 2:
 359                     if (be) {
 360                         p[offset] &= value >> 8;
 361                         p[offset + 1] &= value;
 362                     } else {
 363                         p[offset] &= value;
 364                         p[offset + 1] &= value >> 8;
 365                     }
 366                     pflash_update(pfl, offset, 2);
 367                     break;
 368                 case 4:
 369                     if (be) {
 370                         p[offset] &= value >> 24;
 371                         p[offset + 1] &= value >> 16;
 372                         p[offset + 2] &= value >> 8;
 373                         p[offset + 3] &= value;
 374                     } else {
 375                         p[offset] &= value;
 376                         p[offset + 1] &= value >> 8;
 377                         p[offset + 2] &= value >> 16;
 378                         p[offset + 3] &= value >> 24;
 379                     }
 380                     pflash_update(pfl, offset, 4);
 381                     break;
 382                 }
 383             }
 384             pfl->status = 0x00 | ~(value & 0x80);
 385             /* Let's pretend write is immediate */
 386             if (pfl->bypass)
 387                 goto do_bypass;
 388             goto reset_flash;
 389         case 0x90:
 390             if (pfl->bypass && cmd == 0x00) {
 391                 /* Unlock bypass reset */
 392                 goto reset_flash;
 393             }
 394             /* We can enter CFI query mode from autoselect mode */
 395             if (boff == 0x55 && cmd == 0x98)
 396                 goto enter_CFI_mode;
 397             /* No break here */
 398         default:
 399             DPRINTF("%s: invalid write for command %02x\n",
 400                     __func__, pfl->cmd);
 401             goto reset_flash;
 402         }
 403     case 4:
 404         switch (pfl->cmd) {
 405         case 0xA0:
 406             /* Ignore writes while flash data write is occurring */
 407             /* As we suppose write is immediate, this should never happen */
 408             return;
 409         case 0x80:
 410             goto check_unlock1;
 411         default:
 412             /* Should never happen */
 413             DPRINTF("%s: invalid command state %02x (wc 4)\n",
 414                     __func__, pfl->cmd);
 415             goto reset_flash;
 416         }
 417         break;
 418     case 5:
 419         switch (cmd) {
 420         case 0x10:
 421             if (boff != pfl->unlock_addr0) {
 422                 DPRINTF("%s: chip erase: invalid address " TARGET_FMT_plx "\n",
 423                         __func__, offset);
 424                 goto reset_flash;
 425             }
 426             /* Chip erase */
 427             DPRINTF("%s: start chip erase\n", __func__);
 428             if (!pfl->ro) {
 429                 memset(pfl->storage, 0xFF, pfl->chip_len);
 430                 pflash_update(pfl, 0, pfl->chip_len);
 431             }
 432             pfl->status = 0x00;
 433             /* Let's wait 5 seconds before chip erase is done */
 434             timer_mod(pfl->timer, qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) +
 435                       (NANOSECONDS_PER_SECOND * 5));
 436             break;
 437         case 0x30:
 438             /* Sector erase */
 439             p = pfl->storage;
 440             offset &= ~(pfl->sector_len - 1);
 441             DPRINTF("%s: start sector erase at " TARGET_FMT_plx "\n", __func__,
 442                     offset);
 443             if (!pfl->ro) {
 444                 memset(p + offset, 0xFF, pfl->sector_len);
 445                 pflash_update(pfl, offset, pfl->sector_len);
 446             }
 447             pfl->status = 0x00;
 448             /* Let's wait 1/2 second before sector erase is done */
 449             timer_mod(pfl->timer, qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) +
 450                       (NANOSECONDS_PER_SECOND / 2));
 451             break;
 452         default:
 453             DPRINTF("%s: invalid command %02x (wc 5)\n", __func__, cmd);
 454             goto reset_flash;
 455         }
 456         pfl->cmd = cmd;
 457         break;
 458     case 6:
 459         switch (pfl->cmd) {
 460         case 0x10:
 461             /* Ignore writes during chip erase */
 462             return;
 463         case 0x30:
 464             /* Ignore writes during sector erase */
 465             return;
 466         default:
 467             /* Should never happen */
 468             DPRINTF("%s: invalid command state %02x (wc 6)\n",
 469                     __func__, pfl->cmd);
 470             goto reset_flash;
 471         }
 472         break;
 473     case 7: /* Special value for CFI queries */
 474         DPRINTF("%s: invalid write in CFI query mode\n", __func__);
 475         goto reset_flash;
 476     default:
 477         /* Should never happen */
 478         DPRINTF("%s: invalid write state (wc 7)\n",  __func__);
 479         goto reset_flash;
 480     }
 481     pfl->wcycle++;
 482
 483     return;
 484
 485     /* Reset flash */
 486  reset_flash:
 487     pfl->bypass = 0;
 488     pfl->wcycle = 0;
 489     pfl->cmd = 0;
 490     return;
 491
 492  do_bypass:
 493     pfl->wcycle = 2;
 494     pfl->cmd = 0;
 495 }
 496
 497
 498 static uint32_t pflash_readb_be(void *opaque, hwaddr addr)
 499 {
 500     return pflash_read(opaque, addr, 1, 1);
 501 }
 502
 503 static uint32_t pflash_readb_le(void *opaque, hwaddr addr)
 504 {
 505     return pflash_read(opaque, addr, 1, 0);
 506 }
 507
 508 static uint32_t pflash_readw_be(void *opaque, hwaddr addr)
 509 {
 510     pflash_t *pfl = opaque;
 511
 512     return pflash_read(pfl, addr, 2, 1);
 513 }
 514
 515 static uint32_t pflash_readw_le(void *opaque, hwaddr addr)
 516 {
 517     pflash_t *pfl = opaque;
 518
 519     return pflash_read(pfl, addr, 2, 0);
 520 }
 521
 522 static uint32_t pflash_readl_be(void *opaque, hwaddr addr)
 523 {
 524     pflash_t *pfl = opaque;
 525
 526     return pflash_read(pfl, addr, 4, 1);
 527 }
 528
 529 static uint32_t pflash_readl_le(void *opaque, hwaddr addr)
 530 {
 531     pflash_t *pfl = opaque;
 532
 533     return pflash_read(pfl, addr, 4, 0);
 534 }
 535
 536 static void pflash_writeb_be(void *opaque, hwaddr addr,
 537                              uint32_t value)
 538 {
 539     pflash_write(opaque, addr, value, 1, 1);
 540 }
 541
 542 static void pflash_writeb_le(void *opaque, hwaddr addr,
 543                              uint32_t value)
 544 {
 545     pflash_write(opaque, addr, value, 1, 0);
 546 }
 547
 548 static void pflash_writew_be(void *opaque, hwaddr addr,
 549                              uint32_t value)
 550 {
 551     pflash_t *pfl = opaque;
 552
 553     pflash_write(pfl, addr, value, 2, 1);
 554 }
 555
 556 static void pflash_writew_le(void *opaque, hwaddr addr,
 557                              uint32_t value)
 558 {
 559     pflash_t *pfl = opaque;
 560
 561     pflash_write(pfl, addr, value, 2, 0);
 562 }
 563
 564 static void pflash_writel_be(void *opaque, hwaddr addr,
 565                              uint32_t value)
 566 {
 567     pflash_t *pfl = opaque;
 568
 569     pflash_write(pfl, addr, value, 4, 1);
 570 }
 571
 572 static void pflash_writel_le(void *opaque, hwaddr addr,
 573                              uint32_t value)
 574 {
 575     pflash_t *pfl = opaque;
 576
 577     pflash_write(pfl, addr, value, 4, 0);
 578 }
 579
 580 static const MemoryRegionOps pflash_cfi02_ops_be = {
 581     .old_mmio = {
 582         .read = { pflash_readb_be, pflash_readw_be, pflash_readl_be, },
 583         .write = { pflash_writeb_be, pflash_writew_be, pflash_writel_be, },
 584     },
 585     .endianness = DEVICE_NATIVE_ENDIAN,
 586 };
 587
 588 static const MemoryRegionOps pflash_cfi02_ops_le = {
 589     .old_mmio = {
 590         .read = { pflash_readb_le, pflash_readw_le, pflash_readl_le, },
 591         .write = { pflash_writeb_le, pflash_writew_le, pflash_writel_le, },
 592     },
 593     .endianness = DEVICE_NATIVE_ENDIAN,
 594 };
 595
 596 static void pflash_cfi02_realize(DeviceState *dev, Error **errp)
 597 {
 598     pflash_t *pfl = CFI_PFLASH02(dev);
 599     uint32_t chip_len;
 600     int ret;
 601     Error *local_err = NULL;
 602
 603     chip_len = pfl->sector_len * pfl->nb_blocs;
 604     /* XXX: to be fixed */
 605 #if 0
 606     if (total_len != (8 * 1024 * 1024) && total_len != (16 * 1024 * 1024) &&
 607         total_len != (32 * 1024 * 1024) && total_len != (64 * 1024 * 1024))
 608         return NULL;
 609 #endif
 610
 611     memory_region_init_rom_device(&pfl->orig_mem, OBJECT(pfl), pfl->be ?
 612                                   &pflash_cfi02_ops_be : &pflash_cfi02_ops_le,
 613                                   pfl, pfl->name, chip_len, &local_err);
 614     if (local_err) {
 615         error_propagate(errp, local_err);
 616         return;
 617     }
 618
 619     vmstate_register_ram(&pfl->orig_mem, DEVICE(pfl));
 620     pfl->storage = memory_region_get_ram_ptr(&pfl->orig_mem);
 621     pfl->chip_len = chip_len;
 622     if (pfl->blk) {
 623         /* read the initial flash content */
 624         ret = blk_pread(pfl->blk, 0, pfl->storage, chip_len);
 625         if (ret < 0) {
 626             vmstate_unregister_ram(&pfl->orig_mem, DEVICE(pfl));
 627             error_setg(errp, "failed to read the initial flash content");
 628             return;
 629         }
 630     }
 631
 632     pflash_setup_mappings(pfl);
 633     pfl->rom_mode = 1;
 634     sysbus_init_mmio(SYS_BUS_DEVICE(dev), &pfl->mem);
 635
 636     if (pfl->blk) {
 637         pfl->ro = blk_is_read_only(pfl->blk);
 638     } else {
 639         pfl->ro = 0;
 640     }
 641
 642     pfl->timer = timer_new_ns(QEMU_CLOCK_VIRTUAL, pflash_timer, pfl);
 643     pfl->wcycle = 0;
 644     pfl->cmd = 0;
 645     pfl->status = 0;
 646     /* Hardcoded CFI table (mostly from SG29 Spansion flash) */
 647     pfl->cfi_len = 0x52;
 648     /* Standard "QRY" string */
 649     pfl->cfi_table[0x10] = 'Q';
 650     pfl->cfi_table[0x11] = 'R';
 651     pfl->cfi_table[0x12] = 'Y';
 652     /* Command set (AMD/Fujitsu) */
 653     pfl->cfi_table[0x13] = 0x02;
 654     pfl->cfi_table[0x14] = 0x00;
 655     /* Primary extended table address */
 656     pfl->cfi_table[0x15] = 0x31;
 657     pfl->cfi_table[0x16] = 0x00;
 658     /* Alternate command set (none) */
 659     pfl->cfi_table[0x17] = 0x00;
 660     pfl->cfi_table[0x18] = 0x00;
 661     /* Alternate extended table (none) */
 662     pfl->cfi_table[0x19] = 0x00;
 663     pfl->cfi_table[0x1A] = 0x00;
 664     /* Vcc min */
 665     pfl->cfi_table[0x1B] = 0x27;
 666     /* Vcc max */
 667     pfl->cfi_table[0x1C] = 0x36;
 668     /* Vpp min (no Vpp pin) */
 669     pfl->cfi_table[0x1D] = 0x00;
 670     /* Vpp max (no Vpp pin) */
 671     pfl->cfi_table[0x1E] = 0x00;
 672     /* Reserved */
 673     pfl->cfi_table[0x1F] = 0x07;
 674     /* Timeout for min size buffer write (NA) */
 675     pfl->cfi_table[0x20] = 0x00;
 676     /* Typical timeout for block erase (512 ms) */
 677     pfl->cfi_table[0x21] = 0x09;
 678     /* Typical timeout for full chip erase (4096 ms) */
 679     pfl->cfi_table[0x22] = 0x0C;
 680     /* Reserved */
 681     pfl->cfi_table[0x23] = 0x01;
 682     /* Max timeout for buffer write (NA) */
 683     pfl->cfi_table[0x24] = 0x00;
 684     /* Max timeout for block erase */
 685     pfl->cfi_table[0x25] = 0x0A;
 686     /* Max timeout for chip erase */
 687     pfl->cfi_table[0x26] = 0x0D;
 688     /* Device size */
 689     pfl->cfi_table[0x27] = ctz32(chip_len);
 690     /* Flash device interface (8 & 16 bits) */
 691     pfl->cfi_table[0x28] = 0x02;
 692     pfl->cfi_table[0x29] = 0x00;
 693     /* Max number of bytes in multi-bytes write */
 694     /* XXX: disable buffered write as it's not supported */
 695     //    pfl->cfi_table[0x2A] = 0x05;
 696     pfl->cfi_table[0x2A] = 0x00;
 697     pfl->cfi_table[0x2B] = 0x00;
 698     /* Number of erase block regions (uniform) */
 699     pfl->cfi_table[0x2C] = 0x01;
 700     /* Erase block region 1 */
 701     pfl->cfi_table[0x2D] = pfl->nb_blocs - 1;
 702     pfl->cfi_table[0x2E] = (pfl->nb_blocs - 1) >> 8;
 703     pfl->cfi_table[0x2F] = pfl->sector_len >> 8;
 704     pfl->cfi_table[0x30] = pfl->sector_len >> 16;
 705
 706     /* Extended */
 707     pfl->cfi_table[0x31] = 'P';
 708     pfl->cfi_table[0x32] = 'R';
 709     pfl->cfi_table[0x33] = 'I';
 710
 711     pfl->cfi_table[0x34] = '1';
 712     pfl->cfi_table[0x35] = '0';
 713
 714     pfl->cfi_table[0x36] = 0x00;
 715     pfl->cfi_table[0x37] = 0x00;
 716     pfl->cfi_table[0x38] = 0x00;
 717     pfl->cfi_table[0x39] = 0x00;
 718
 719     pfl->cfi_table[0x3a] = 0x00;
 720
 721     pfl->cfi_table[0x3b] = 0x00;
 722     pfl->cfi_table[0x3c] = 0x00;
 723 }
 724
 725 static Property pflash_cfi02_properties[] = {
 726     DEFINE_PROP_DRIVE("drive", struct pflash_t, blk),
 727     DEFINE_PROP_UINT32("num-blocks", struct pflash_t, nb_blocs, 0),
 728     DEFINE_PROP_UINT32("sector-length", struct pflash_t, sector_len, 0),
 729     DEFINE_PROP_UINT8("width", struct pflash_t, width, 0),
 730     DEFINE_PROP_UINT8("mappings", struct pflash_t, mappings, 0),
 731     DEFINE_PROP_UINT8("big-endian", struct pflash_t, be, 0),
 732     DEFINE_PROP_UINT16("id0", struct pflash_t, ident0, 0),
 733     DEFINE_PROP_UINT16("id1", struct pflash_t, ident1, 0),
 734     DEFINE_PROP_UINT16("id2", struct pflash_t, ident2, 0),
 735     DEFINE_PROP_UINT16("id3", struct pflash_t, ident3, 0),
 736     DEFINE_PROP_UINT16("unlock-addr0", struct pflash_t, unlock_addr0, 0),
 737     DEFINE_PROP_UINT16("unlock-addr1", struct pflash_t, unlock_addr1, 0),
 738     DEFINE_PROP_STRING("name", struct pflash_t, name),
 739     DEFINE_PROP_END_OF_LIST(),
 740 };
 741
 742 static void pflash_cfi02_class_init(ObjectClass *klass, void *data)
 743 {
 744     DeviceClass *dc = DEVICE_CLASS(klass);
 745
 746     dc->realize = pflash_cfi02_realize;
 747     dc->props = pflash_cfi02_properties;
 748     set_bit(DEVICE_CATEGORY_STORAGE, dc->categories);
 749 }
 750
 751 static const TypeInfo pflash_cfi02_info = {
 752     .name           = TYPE_CFI_PFLASH02,
 753     .parent         = TYPE_SYS_BUS_DEVICE,
 754     .instance_size  = sizeof(struct pflash_t),
 755     .class_init     = pflash_cfi02_class_init,
 756 };
 757
 758 static void pflash_cfi02_register_types(void)
 759 {
 760     type_register_static(&pflash_cfi02_info);
 761 }
 762
 763 type_init(pflash_cfi02_register_types)
 764
 765 pflash_t *pflash_cfi02_register(hwaddr base,
 766                                 DeviceState *qdev, const char *name,
 767                                 hwaddr size,
 768                                 BlockBackend *blk, uint32_t sector_len,
 769                                 int nb_blocs, int nb_mappings, int width,
 770                                 uint16_t id0, uint16_t id1,
 771                                 uint16_t id2, uint16_t id3,
 772                                 uint16_t unlock_addr0, uint16_t unlock_addr1,
 773                                 int be)
 774 {
 775     DeviceState *dev = qdev_create(NULL, TYPE_CFI_PFLASH02);
 776
 777     if (blk) {
 778         qdev_prop_set_drive(dev, "drive", blk, &error_abort);
 779     }
 780     qdev_prop_set_uint32(dev, "num-blocks", nb_blocs);
 781     qdev_prop_set_uint32(dev, "sector-length", sector_len);
 782     qdev_prop_set_uint8(dev, "width", width);
 783     qdev_prop_set_uint8(dev, "mappings", nb_mappings);
 784     qdev_prop_set_uint8(dev, "big-endian", !!be);
 785     qdev_prop_set_uint16(dev, "id0", id0);
 786     qdev_prop_set_uint16(dev, "id1", id1);
 787     qdev_prop_set_uint16(dev, "id2", id2);
 788     qdev_prop_set_uint16(dev, "id3", id3);
 789     qdev_prop_set_uint16(dev, "unlock-addr0", unlock_addr0);
 790     qdev_prop_set_uint16(dev, "unlock-addr1", unlock_addr1);
 791     qdev_prop_set_string(dev, "name", name);
 792     qdev_init_nofail(dev);
 793
 794     sysbus_mmio_map(SYS_BUS_DEVICE(dev), 0, base);
 795     return CFI_PFLASH02(dev);
 796 }