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.h"
  42
  43 //#define PFLASH_DEBUG
  44 #ifdef PFLASH_DEBUG
  45 #define DPRINTF(fmt, ...)                          \
  46 do {                                               \
  47     printf("PFLASH: " fmt , ## __VA_ARGS__);       \
  48 } while (0)
  49 #else
  50 #define DPRINTF(fmt, ...) do { } while (0)
  51 #endif
  52
  53 #define PFLASH_LAZY_ROMD_THRESHOLD 42
  54
  55 struct pflash_t {
  56     BlockDriverState *bs;
  57     target_phys_addr_t base;
  58     uint32_t sector_len;
  59     uint32_t chip_len;
  60     int mappings;
  61     int width;
  62     int wcycle; /* if 0, the flash is read normally */
  63     int bypass;
  64     int ro;
  65     uint8_t cmd;
  66     uint8_t status;
  67     uint16_t ident[4];
  68     uint16_t unlock_addr[2];
  69     uint8_t cfi_len;
  70     uint8_t cfi_table[0x52];
  71     QEMUTimer *timer;
  72     ram_addr_t off;
  73     int fl_mem;
  74     int rom_mode;
  75     int read_counter; /* used for lazy switch-back to rom mode */
  76     void *storage;
  77 };
  78
  79 static void pflash_register_memory(pflash_t *pfl, int rom_mode)
  80 {
  81     unsigned long phys_offset = pfl->fl_mem;
  82     int i;
  83
  84     if (rom_mode)
  85         phys_offset |= pfl->off | IO_MEM_ROMD;
  86     pfl->rom_mode = rom_mode;
  87
  88     for (i = 0; i < pfl->mappings; i++)
  89         cpu_register_physical_memory(pfl->base + i * pfl->chip_len,
  90                                      pfl->chip_len, phys_offset);
  91 }
  92
  93 static void pflash_timer (void *opaque)
  94 {
  95     pflash_t *pfl = opaque;
  96
  97     DPRINTF("%s: command %02x done\n", __func__, pfl->cmd);
  98     /* Reset flash */
  99     pfl->status ^= 0x80;
 100     if (pfl->bypass) {
 101         pfl->wcycle = 2;
 102     } else {
 103         pflash_register_memory(pfl, 1);
 104         pfl->wcycle = 0;
 105     }
 106     pfl->cmd = 0;
 107 }
 108
 109 static uint32_t pflash_read (pflash_t *pfl, target_phys_addr_t offset,
 110                              int width, int be)
 111 {
 112     target_phys_addr_t boff;
 113     uint32_t ret;
 114     uint8_t *p;
 115
 116     DPRINTF("%s: offset " TARGET_FMT_plx "\n", __func__, offset);
 117     ret = -1;
 118     /* Lazy reset to ROMD mode after a certain amount of read accesses */
 119     if (!pfl->rom_mode && pfl->wcycle == 0 &&
 120         ++pfl->read_counter > PFLASH_LAZY_ROMD_THRESHOLD) {
 121         pflash_register_memory(pfl, 1);
 122     }
 123     offset &= pfl->chip_len - 1;
 124     boff = offset & 0xFF;
 125     if (pfl->width == 2)
 126         boff = boff >> 1;
 127     else if (pfl->width == 4)
 128         boff = boff >> 2;
 129     switch (pfl->cmd) {
 130     default:
 131         /* This should never happen : reset state & treat it as a read*/
 132         DPRINTF("%s: unknown command state: %x\n", __func__, pfl->cmd);
 133         pfl->wcycle = 0;
 134         pfl->cmd = 0;
 135     case 0x80:
 136         /* We accept reads during second unlock sequence... */
 137     case 0x00:
 138     flash_read:
 139         /* Flash area read */
 140         p = pfl->storage;
 141         switch (width) {
 142         case 1:
 143             ret = p[offset];
 144 //            DPRINTF("%s: data offset %08x %02x\n", __func__, offset, ret);
 145             break;
 146         case 2:
 147             if (be) {
 148                 ret = p[offset] << 8;
 149                 ret |= p[offset + 1];
 150             } else {
 151                 ret = p[offset];
 152                 ret |= p[offset + 1] << 8;
 153             }
 154 //            DPRINTF("%s: data offset %08x %04x\n", __func__, offset, ret);
 155             break;
 156         case 4:
 157             if (be) {
 158                 ret = p[offset] << 24;
 159                 ret |= p[offset + 1] << 16;
 160                 ret |= p[offset + 2] << 8;
 161                 ret |= p[offset + 3];
 162             } else {
 163                 ret = p[offset];
 164                 ret |= p[offset + 1] << 8;
 165                 ret |= p[offset + 2] << 16;
 166                 ret |= p[offset + 3] << 24;
 167             }
 168 //            DPRINTF("%s: data offset %08x %08x\n", __func__, offset, ret);
 169             break;
 170         }
 171         break;
 172     case 0x90:
 173         /* flash ID read */
 174         switch (boff) {
 175         case 0x00:
 176         case 0x01:
 177             ret = pfl->ident[boff & 0x01];
 178             break;
 179         case 0x02:
 180             ret = 0x00; /* Pretend all sectors are unprotected */
 181             break;
 182         case 0x0E:
 183         case 0x0F:
 184             if (pfl->ident[2 + (boff & 0x01)] == (uint8_t)-1)
 185                 goto flash_read;
 186             ret = pfl->ident[2 + (boff & 0x01)];
 187             break;
 188         default:
 189             goto flash_read;
 190         }
 191         DPRINTF("%s: ID " TARGET_FMT_plx " %x\n", __func__, boff, ret);
 192         break;
 193     case 0xA0:
 194     case 0x10:
 195     case 0x30:
 196         /* Status register read */
 197         ret = pfl->status;
 198         DPRINTF("%s: status %x\n", __func__, ret);
 199         /* Toggle bit 6 */
 200         pfl->status ^= 0x40;
 201         break;
 202     case 0x98:
 203         /* CFI query mode */
 204         if (boff > pfl->cfi_len)
 205             ret = 0;
 206         else
 207             ret = pfl->cfi_table[boff];
 208         break;
 209     }
 210
 211     return ret;
 212 }
 213
 214 /* update flash content on disk */
 215 static void pflash_update(pflash_t *pfl, int offset,
 216                           int size)
 217 {
 218     int offset_end;
 219     if (pfl->bs) {
 220         offset_end = offset + size;
 221         /* round to sectors */
 222         offset = offset >> 9;
 223         offset_end = (offset_end + 511) >> 9;
 224         bdrv_write(pfl->bs, offset, pfl->storage + (offset << 9),
 225                    offset_end - offset);
 226     }
 227 }
 228
 229 static void pflash_write (pflash_t *pfl, target_phys_addr_t offset,
 230                           uint32_t value, int width, int be)
 231 {
 232     target_phys_addr_t boff;
 233     uint8_t *p;
 234     uint8_t cmd;
 235
 236     cmd = value;
 237     if (pfl->cmd != 0xA0 && cmd == 0xF0) {
 238 #if 0
 239         DPRINTF("%s: flash reset asked (%02x %02x)\n",
 240                 __func__, pfl->cmd, cmd);
 241 #endif
 242         goto reset_flash;
 243     }
 244     DPRINTF("%s: offset " TARGET_FMT_plx " %08x %d %d\n", __func__,
 245             offset, value, width, pfl->wcycle);
 246     offset &= pfl->chip_len - 1;
 247
 248     DPRINTF("%s: offset " TARGET_FMT_plx " %08x %d\n", __func__,
 249             offset, value, width);
 250     boff = offset & (pfl->sector_len - 1);
 251     if (pfl->width == 2)
 252         boff = boff >> 1;
 253     else if (pfl->width == 4)
 254         boff = boff >> 2;
 255     switch (pfl->wcycle) {
 256     case 0:
 257         /* Set the device in I/O access mode if required */
 258         if (pfl->rom_mode)
 259             pflash_register_memory(pfl, 0);
 260         pfl->read_counter = 0;
 261         /* We're in read mode */
 262     check_unlock0:
 263         if (boff == 0x55 && cmd == 0x98) {
 264         enter_CFI_mode:
 265             /* Enter CFI query mode */
 266             pfl->wcycle = 7;
 267             pfl->cmd = 0x98;
 268             return;
 269         }
 270         if (boff != pfl->unlock_addr[0] || cmd != 0xAA) {
 271             DPRINTF("%s: unlock0 failed " TARGET_FMT_plx " %02x %04x\n",
 272                     __func__, boff, cmd, pfl->unlock_addr[0]);
 273             goto reset_flash;
 274         }
 275         DPRINTF("%s: unlock sequence started\n", __func__);
 276         break;
 277     case 1:
 278         /* We started an unlock sequence */
 279     check_unlock1:
 280         if (boff != pfl->unlock_addr[1] || cmd != 0x55) {
 281             DPRINTF("%s: unlock1 failed " TARGET_FMT_plx " %02x\n", __func__,
 282                     boff, cmd);
 283             goto reset_flash;
 284         }
 285         DPRINTF("%s: unlock sequence done\n", __func__);
 286         break;
 287     case 2:
 288         /* We finished an unlock sequence */
 289         if (!pfl->bypass && boff != pfl->unlock_addr[0]) {
 290             DPRINTF("%s: command failed " TARGET_FMT_plx " %02x\n", __func__,
 291                     boff, cmd);
 292             goto reset_flash;
 293         }
 294         switch (cmd) {
 295         case 0x20:
 296             pfl->bypass = 1;
 297             goto do_bypass;
 298         case 0x80:
 299         case 0x90:
 300         case 0xA0:
 301             pfl->cmd = cmd;
 302             DPRINTF("%s: starting command %02x\n", __func__, cmd);
 303             break;
 304         default:
 305             DPRINTF("%s: unknown command %02x\n", __func__, cmd);
 306             goto reset_flash;
 307         }
 308         break;
 309     case 3:
 310         switch (pfl->cmd) {
 311         case 0x80:
 312             /* We need another unlock sequence */
 313             goto check_unlock0;
 314         case 0xA0:
 315             DPRINTF("%s: write data offset " TARGET_FMT_plx " %08x %d\n",
 316                     __func__, offset, value, width);
 317             p = pfl->storage;
 318             switch (width) {
 319             case 1:
 320                 p[offset] &= value;
 321                 pflash_update(pfl, offset, 1);
 322                 break;
 323             case 2:
 324                 if (be) {
 325                     p[offset] &= value >> 8;
 326                     p[offset + 1] &= value;
 327                 } else {
 328                     p[offset] &= value;
 329                     p[offset + 1] &= value >> 8;
 330                 }
 331                 pflash_update(pfl, offset, 2);
 332                 break;
 333             case 4:
 334                 if (be) {
 335                     p[offset] &= value >> 24;
 336                     p[offset + 1] &= value >> 16;
 337                     p[offset + 2] &= value >> 8;
 338                     p[offset + 3] &= value;
 339                 } else {
 340                     p[offset] &= value;
 341                     p[offset + 1] &= value >> 8;
 342                     p[offset + 2] &= value >> 16;
 343                     p[offset + 3] &= value >> 24;
 344                 }
 345                 pflash_update(pfl, offset, 4);
 346                 break;
 347             }
 348             pfl->status = 0x00 | ~(value & 0x80);
 349             /* Let's pretend write is immediate */
 350             if (pfl->bypass)
 351                 goto do_bypass;
 352             goto reset_flash;
 353         case 0x90:
 354             if (pfl->bypass && cmd == 0x00) {
 355                 /* Unlock bypass reset */
 356                 goto reset_flash;
 357             }
 358             /* We can enter CFI query mode from autoselect mode */
 359             if (boff == 0x55 && cmd == 0x98)
 360                 goto enter_CFI_mode;
 361             /* No break here */
 362         default:
 363             DPRINTF("%s: invalid write for command %02x\n",
 364                     __func__, pfl->cmd);
 365             goto reset_flash;
 366         }
 367     case 4:
 368         switch (pfl->cmd) {
 369         case 0xA0:
 370             /* Ignore writes while flash data write is occurring */
 371             /* As we suppose write is immediate, this should never happen */
 372             return;
 373         case 0x80:
 374             goto check_unlock1;
 375         default:
 376             /* Should never happen */
 377             DPRINTF("%s: invalid command state %02x (wc 4)\n",
 378                     __func__, pfl->cmd);
 379             goto reset_flash;
 380         }
 381         break;
 382     case 5:
 383         switch (cmd) {
 384         case 0x10:
 385             if (boff != pfl->unlock_addr[0]) {
 386                 DPRINTF("%s: chip erase: invalid address " TARGET_FMT_plx "\n",
 387                         __func__, offset);
 388                 goto reset_flash;
 389             }
 390             /* Chip erase */
 391             DPRINTF("%s: start chip erase\n", __func__);
 392             memset(pfl->storage, 0xFF, pfl->chip_len);
 393             pfl->status = 0x00;
 394             pflash_update(pfl, 0, pfl->chip_len);
 395             /* Let's wait 5 seconds before chip erase is done */
 396             qemu_mod_timer(pfl->timer,
 397                            qemu_get_clock_ns(vm_clock) + (get_ticks_per_sec() * 5));
 398             break;
 399         case 0x30:
 400             /* Sector erase */
 401             p = pfl->storage;
 402             offset &= ~(pfl->sector_len - 1);
 403             DPRINTF("%s: start sector erase at " TARGET_FMT_plx "\n", __func__,
 404                     offset);
 405             memset(p + offset, 0xFF, pfl->sector_len);
 406             pflash_update(pfl, offset, pfl->sector_len);
 407             pfl->status = 0x00;
 408             /* Let's wait 1/2 second before sector erase is done */
 409             qemu_mod_timer(pfl->timer,
 410                            qemu_get_clock_ns(vm_clock) + (get_ticks_per_sec() / 2));
 411             break;
 412         default:
 413             DPRINTF("%s: invalid command %02x (wc 5)\n", __func__, cmd);
 414             goto reset_flash;
 415         }
 416         pfl->cmd = cmd;
 417         break;
 418     case 6:
 419         switch (pfl->cmd) {
 420         case 0x10:
 421             /* Ignore writes during chip erase */
 422             return;
 423         case 0x30:
 424             /* Ignore writes during sector erase */
 425             return;
 426         default:
 427             /* Should never happen */
 428             DPRINTF("%s: invalid command state %02x (wc 6)\n",
 429                     __func__, pfl->cmd);
 430             goto reset_flash;
 431         }
 432         break;
 433     case 7: /* Special value for CFI queries */
 434         DPRINTF("%s: invalid write in CFI query mode\n", __func__);
 435         goto reset_flash;
 436     default:
 437         /* Should never happen */
 438         DPRINTF("%s: invalid write state (wc 7)\n",  __func__);
 439         goto reset_flash;
 440     }
 441     pfl->wcycle++;
 442
 443     return;
 444
 445     /* Reset flash */
 446  reset_flash:
 447     pfl->bypass = 0;
 448     pfl->wcycle = 0;
 449     pfl->cmd = 0;
 450     return;
 451
 452  do_bypass:
 453     pfl->wcycle = 2;
 454     pfl->cmd = 0;
 455     return;
 456 }
 457
 458
 459 static uint32_t pflash_readb_be(void *opaque, target_phys_addr_t addr)
 460 {
 461     return pflash_read(opaque, addr, 1, 1);
 462 }
 463
 464 static uint32_t pflash_readb_le(void *opaque, target_phys_addr_t addr)
 465 {
 466     return pflash_read(opaque, addr, 1, 0);
 467 }
 468
 469 static uint32_t pflash_readw_be(void *opaque, target_phys_addr_t addr)
 470 {
 471     pflash_t *pfl = opaque;
 472
 473     return pflash_read(pfl, addr, 2, 1);
 474 }
 475
 476 static uint32_t pflash_readw_le(void *opaque, target_phys_addr_t addr)
 477 {
 478     pflash_t *pfl = opaque;
 479
 480     return pflash_read(pfl, addr, 2, 0);
 481 }
 482
 483 static uint32_t pflash_readl_be(void *opaque, target_phys_addr_t addr)
 484 {
 485     pflash_t *pfl = opaque;
 486
 487     return pflash_read(pfl, addr, 4, 1);
 488 }
 489
 490 static uint32_t pflash_readl_le(void *opaque, target_phys_addr_t addr)
 491 {
 492     pflash_t *pfl = opaque;
 493
 494     return pflash_read(pfl, addr, 4, 0);
 495 }
 496
 497 static void pflash_writeb_be(void *opaque, target_phys_addr_t addr,
 498                              uint32_t value)
 499 {
 500     pflash_write(opaque, addr, value, 1, 1);
 501 }
 502
 503 static void pflash_writeb_le(void *opaque, target_phys_addr_t addr,
 504                              uint32_t value)
 505 {
 506     pflash_write(opaque, addr, value, 1, 0);
 507 }
 508
 509 static void pflash_writew_be(void *opaque, target_phys_addr_t addr,
 510                              uint32_t value)
 511 {
 512     pflash_t *pfl = opaque;
 513
 514     pflash_write(pfl, addr, value, 2, 1);
 515 }
 516
 517 static void pflash_writew_le(void *opaque, target_phys_addr_t addr,
 518                              uint32_t value)
 519 {
 520     pflash_t *pfl = opaque;
 521
 522     pflash_write(pfl, addr, value, 2, 0);
 523 }
 524
 525 static void pflash_writel_be(void *opaque, target_phys_addr_t addr,
 526                              uint32_t value)
 527 {
 528     pflash_t *pfl = opaque;
 529
 530     pflash_write(pfl, addr, value, 4, 1);
 531 }
 532
 533 static void pflash_writel_le(void *opaque, target_phys_addr_t addr,
 534                              uint32_t value)
 535 {
 536     pflash_t *pfl = opaque;
 537
 538     pflash_write(pfl, addr, value, 4, 0);
 539 }
 540
 541 static CPUWriteMemoryFunc * const pflash_write_ops_be[] = {
 542     &pflash_writeb_be,
 543     &pflash_writew_be,
 544     &pflash_writel_be,
 545 };
 546
 547 static CPUReadMemoryFunc * const pflash_read_ops_be[] = {
 548     &pflash_readb_be,
 549     &pflash_readw_be,
 550     &pflash_readl_be,
 551 };
 552
 553 static CPUWriteMemoryFunc * const pflash_write_ops_le[] = {
 554     &pflash_writeb_le,
 555     &pflash_writew_le,
 556     &pflash_writel_le,
 557 };
 558
 559 static CPUReadMemoryFunc * const pflash_read_ops_le[] = {
 560     &pflash_readb_le,
 561     &pflash_readw_le,
 562     &pflash_readl_le,
 563 };
 564
 565 /* Count trailing zeroes of a 32 bits quantity */
 566 static int ctz32 (uint32_t n)
 567 {
 568     int ret;
 569
 570     ret = 0;
 571     if (!(n & 0xFFFF)) {
 572         ret += 16;
 573         n = n >> 16;
 574     }
 575     if (!(n & 0xFF)) {
 576         ret += 8;
 577         n = n >> 8;
 578     }
 579     if (!(n & 0xF)) {
 580         ret += 4;
 581         n = n >> 4;
 582     }
 583     if (!(n & 0x3)) {
 584         ret += 2;
 585         n = n >> 2;
 586     }
 587     if (!(n & 0x1)) {
 588         ret++;
 589 #if 0 /* This is not necessary as n is never 0 */
 590         n = n >> 1;
 591 #endif
 592     }
 593 #if 0 /* This is not necessary as n is never 0 */
 594     if (!n)
 595         ret++;
 596 #endif
 597
 598     return ret;
 599 }
 600
 601 pflash_t *pflash_cfi02_register(target_phys_addr_t base, ram_addr_t off,
 602                                 BlockDriverState *bs, uint32_t sector_len,
 603                                 int nb_blocs, int nb_mappings, int width,
 604                                 uint16_t id0, uint16_t id1,
 605                                 uint16_t id2, uint16_t id3,
 606                                 uint16_t unlock_addr0, uint16_t unlock_addr1,
 607                                 int be)
 608 {
 609     pflash_t *pfl;
 610     int32_t chip_len;
 611     int ret;
 612
 613     chip_len = sector_len * nb_blocs;
 614     /* XXX: to be fixed */
 615 #if 0
 616     if (total_len != (8 * 1024 * 1024) && total_len != (16 * 1024 * 1024) &&
 617         total_len != (32 * 1024 * 1024) && total_len != (64 * 1024 * 1024))
 618         return NULL;
 619 #endif
 620     pfl = qemu_mallocz(sizeof(pflash_t));
 621     /* FIXME: Allocate ram ourselves.  */
 622     pfl->storage = qemu_get_ram_ptr(off);
 623     if (be) {
 624         pfl->fl_mem = cpu_register_io_memory(pflash_read_ops_be,
 625                                              pflash_write_ops_be,
 626                                              pfl, DEVICE_NATIVE_ENDIAN);
 627     } else {
 628         pfl->fl_mem = cpu_register_io_memory(pflash_read_ops_le,
 629                                              pflash_write_ops_le,
 630                                              pfl, DEVICE_NATIVE_ENDIAN);
 631     }
 632     pfl->off = off;
 633     pfl->base = base;
 634     pfl->chip_len = chip_len;
 635     pfl->mappings = nb_mappings;
 636     pflash_register_memory(pfl, 1);
 637     pfl->bs = bs;
 638     if (pfl->bs) {
 639         /* read the initial flash content */
 640         ret = bdrv_read(pfl->bs, 0, pfl->storage, chip_len >> 9);
 641         if (ret < 0) {
 642             cpu_unregister_io_memory(pfl->fl_mem);
 643             qemu_free(pfl);
 644             return NULL;
 645         }
 646     }
 647 #if 0 /* XXX: there should be a bit to set up read-only,
 648        *      the same way the hardware does (with WP pin).
 649        */
 650     pfl->ro = 1;
 651 #else
 652     pfl->ro = 0;
 653 #endif
 654     pfl->timer = qemu_new_timer_ns(vm_clock, pflash_timer, pfl);
 655     pfl->sector_len = sector_len;
 656     pfl->width = width;
 657     pfl->wcycle = 0;
 658     pfl->cmd = 0;
 659     pfl->status = 0;
 660     pfl->ident[0] = id0;
 661     pfl->ident[1] = id1;
 662     pfl->ident[2] = id2;
 663     pfl->ident[3] = id3;
 664     pfl->unlock_addr[0] = unlock_addr0;
 665     pfl->unlock_addr[1] = unlock_addr1;
 666     /* Hardcoded CFI table (mostly from SG29 Spansion flash) */
 667     pfl->cfi_len = 0x52;
 668     /* Standard "QRY" string */
 669     pfl->cfi_table[0x10] = 'Q';
 670     pfl->cfi_table[0x11] = 'R';
 671     pfl->cfi_table[0x12] = 'Y';
 672     /* Command set (AMD/Fujitsu) */
 673     pfl->cfi_table[0x13] = 0x02;
 674     pfl->cfi_table[0x14] = 0x00;
 675     /* Primary extended table address */
 676     pfl->cfi_table[0x15] = 0x31;
 677     pfl->cfi_table[0x16] = 0x00;
 678     /* Alternate command set (none) */
 679     pfl->cfi_table[0x17] = 0x00;
 680     pfl->cfi_table[0x18] = 0x00;
 681     /* Alternate extended table (none) */
 682     pfl->cfi_table[0x19] = 0x00;
 683     pfl->cfi_table[0x1A] = 0x00;
 684     /* Vcc min */
 685     pfl->cfi_table[0x1B] = 0x27;
 686     /* Vcc max */
 687     pfl->cfi_table[0x1C] = 0x36;
 688     /* Vpp min (no Vpp pin) */
 689     pfl->cfi_table[0x1D] = 0x00;
 690     /* Vpp max (no Vpp pin) */
 691     pfl->cfi_table[0x1E] = 0x00;
 692     /* Reserved */
 693     pfl->cfi_table[0x1F] = 0x07;
 694     /* Timeout for min size buffer write (NA) */
 695     pfl->cfi_table[0x20] = 0x00;
 696     /* Typical timeout for block erase (512 ms) */
 697     pfl->cfi_table[0x21] = 0x09;
 698     /* Typical timeout for full chip erase (4096 ms) */
 699     pfl->cfi_table[0x22] = 0x0C;
 700     /* Reserved */
 701     pfl->cfi_table[0x23] = 0x01;
 702     /* Max timeout for buffer write (NA) */
 703     pfl->cfi_table[0x24] = 0x00;
 704     /* Max timeout for block erase */
 705     pfl->cfi_table[0x25] = 0x0A;
 706     /* Max timeout for chip erase */
 707     pfl->cfi_table[0x26] = 0x0D;
 708     /* Device size */
 709     pfl->cfi_table[0x27] = ctz32(chip_len);
 710     /* Flash device interface (8 & 16 bits) */
 711     pfl->cfi_table[0x28] = 0x02;
 712     pfl->cfi_table[0x29] = 0x00;
 713     /* Max number of bytes in multi-bytes write */
 714     /* XXX: disable buffered write as it's not supported */
 715     //    pfl->cfi_table[0x2A] = 0x05;
 716     pfl->cfi_table[0x2A] = 0x00;
 717     pfl->cfi_table[0x2B] = 0x00;
 718     /* Number of erase block regions (uniform) */
 719     pfl->cfi_table[0x2C] = 0x01;
 720     /* Erase block region 1 */
 721     pfl->cfi_table[0x2D] = nb_blocs - 1;
 722     pfl->cfi_table[0x2E] = (nb_blocs - 1) >> 8;
 723     pfl->cfi_table[0x2F] = sector_len >> 8;
 724     pfl->cfi_table[0x30] = sector_len >> 16;
 725
 726     /* Extended */
 727     pfl->cfi_table[0x31] = 'P';
 728     pfl->cfi_table[0x32] = 'R';
 729     pfl->cfi_table[0x33] = 'I';
 730
 731     pfl->cfi_table[0x34] = '1';
 732     pfl->cfi_table[0x35] = '0';
 733
 734     pfl->cfi_table[0x36] = 0x00;
 735     pfl->cfi_table[0x37] = 0x00;
 736     pfl->cfi_table[0x38] = 0x00;
 737     pfl->cfi_table[0x39] = 0x00;
 738
 739     pfl->cfi_table[0x3a] = 0x00;
 740
 741     pfl->cfi_table[0x3b] = 0x00;
 742     pfl->cfi_table[0x3c] = 0x00;
 743
 744     return pfl;
 745 }