hw/onenand.c

   1 /*
   2  * OneNAND flash memories emulation.
   3  *
   4  * Copyright (C) 2008 Nokia Corporation
   5  * Written by Andrzej Zaborowski <andrew@openedhand.com>
   6  *
   7  * This program is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU General Public License as
   9  * published by the Free Software Foundation; either version 2 or
  10  * (at your option) version 3 of the License.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License along
  18  * with this program; if not, see <http://www.gnu.org/licenses/>.
  19  */
  20
  21 #include "qemu-common.h"
  22 #include "hw/hw.h"
  23 #include "hw/flash.h"
  24 #include "hw/irq.h"
  25 #include "sysemu/blockdev.h"
  26 #include "exec/memory.h"
  27 #include "exec/address-spaces.h"
  28 #include "hw/sysbus.h"
  29 #include "qemu/error-report.h"
  30
  31 /* 11 for 2kB-page OneNAND ("2nd generation") and 10 for 1kB-page chips */
  32 #define PAGE_SHIFT      11
  33
  34 /* Fixed */
  35 #define BLOCK_SHIFT     (PAGE_SHIFT + 6)
  36
  37 typedef struct {
  38     SysBusDevice busdev;
  39     struct {
  40         uint16_t man;
  41         uint16_t dev;
  42         uint16_t ver;
  43     } id;
  44     int shift;
  45     hwaddr base;
  46     qemu_irq intr;
  47     qemu_irq rdy;
  48     BlockDriverState *bdrv;
  49     BlockDriverState *bdrv_cur;
  50     uint8_t *image;
  51     uint8_t *otp;
  52     uint8_t *current;
  53     MemoryRegion ram;
  54     MemoryRegion mapped_ram;
  55     uint8_t current_direction;
  56     uint8_t *boot[2];
  57     uint8_t *data[2][2];
  58     MemoryRegion iomem;
  59     MemoryRegion container;
  60     int cycle;
  61     int otpmode;
  62
  63     uint16_t addr[8];
  64     uint16_t unladdr[8];
  65     int bufaddr;
  66     int count;
  67     uint16_t command;
  68     uint16_t config[2];
  69     uint16_t status;
  70     uint16_t intstatus;
  71     uint16_t wpstatus;
  72
  73     ECCState ecc;
  74
  75     int density_mask;
  76     int secs;
  77     int secs_cur;
  78     int blocks;
  79     uint8_t *blockwp;
  80 } OneNANDState;
  81
  82 enum {
  83     ONEN_BUF_BLOCK = 0,
  84     ONEN_BUF_BLOCK2 = 1,
  85     ONEN_BUF_DEST_BLOCK = 2,
  86     ONEN_BUF_DEST_PAGE = 3,
  87     ONEN_BUF_PAGE = 7,
  88 };
  89
  90 enum {
  91     ONEN_ERR_CMD = 1 << 10,
  92     ONEN_ERR_ERASE = 1 << 11,
  93     ONEN_ERR_PROG = 1 << 12,
  94     ONEN_ERR_LOAD = 1 << 13,
  95 };
  96
  97 enum {
  98     ONEN_INT_RESET = 1 << 4,
  99     ONEN_INT_ERASE = 1 << 5,
 100     ONEN_INT_PROG = 1 << 6,
 101     ONEN_INT_LOAD = 1 << 7,
 102     ONEN_INT = 1 << 15,
 103 };
 104
 105 enum {
 106     ONEN_LOCK_LOCKTIGHTEN = 1 << 0,
 107     ONEN_LOCK_LOCKED = 1 << 1,
 108     ONEN_LOCK_UNLOCKED = 1 << 2,
 109 };
 110
 111 static void onenand_mem_setup(OneNANDState *s)
 112 {
 113     /* XXX: We should use IO_MEM_ROMD but we broke it earlier...
 114      * Both 0x0000 ... 0x01ff and 0x8000 ... 0x800f can be used to
 115      * write boot commands.  Also take note of the BWPS bit.  */
 116     memory_region_init(&s->container, "onenand", 0x10000 << s->shift);
 117     memory_region_add_subregion(&s->container, 0, &s->iomem);
 118     memory_region_init_alias(&s->mapped_ram, "onenand-mapped-ram",
 119                              &s->ram, 0x0200 << s->shift,
 120                              0xbe00 << s->shift);
 121     memory_region_add_subregion_overlap(&s->container,
 122                                         0x0200 << s->shift,
 123                                         &s->mapped_ram,
 124                                         1);
 125 }
 126
 127 static void onenand_intr_update(OneNANDState *s)
 128 {
 129     qemu_set_irq(s->intr, ((s->intstatus >> 15) ^ (~s->config[0] >> 6)) & 1);
 130 }
 131
 132 static void onenand_pre_save(void *opaque)
 133 {
 134     OneNANDState *s = opaque;
 135     if (s->current == s->otp) {
 136         s->current_direction = 1;
 137     } else if (s->current == s->image) {
 138         s->current_direction = 2;
 139     } else {
 140         s->current_direction = 0;
 141     }
 142 }
 143
 144 static int onenand_post_load(void *opaque, int version_id)
 145 {
 146     OneNANDState *s = opaque;
 147     switch (s->current_direction) {
 148     case 0:
 149         break;
 150     case 1:
 151         s->current = s->otp;
 152         break;
 153     case 2:
 154         s->current = s->image;
 155         break;
 156     default:
 157         return -1;
 158     }
 159     onenand_intr_update(s);
 160     return 0;
 161 }
 162
 163 static const VMStateDescription vmstate_onenand = {
 164     .name = "onenand",
 165     .version_id = 1,
 166     .minimum_version_id = 1,
 167     .minimum_version_id_old = 1,
 168     .pre_save = onenand_pre_save,
 169     .post_load = onenand_post_load,
 170     .fields = (VMStateField[]) {
 171         VMSTATE_UINT8(current_direction, OneNANDState),
 172         VMSTATE_INT32(cycle, OneNANDState),
 173         VMSTATE_INT32(otpmode, OneNANDState),
 174         VMSTATE_UINT16_ARRAY(addr, OneNANDState, 8),
 175         VMSTATE_UINT16_ARRAY(unladdr, OneNANDState, 8),
 176         VMSTATE_INT32(bufaddr, OneNANDState),
 177         VMSTATE_INT32(count, OneNANDState),
 178         VMSTATE_UINT16(command, OneNANDState),
 179         VMSTATE_UINT16_ARRAY(config, OneNANDState, 2),
 180         VMSTATE_UINT16(status, OneNANDState),
 181         VMSTATE_UINT16(intstatus, OneNANDState),
 182         VMSTATE_UINT16(wpstatus, OneNANDState),
 183         VMSTATE_INT32(secs_cur, OneNANDState),
 184         VMSTATE_PARTIAL_VBUFFER(blockwp, OneNANDState, blocks),
 185         VMSTATE_UINT8(ecc.cp, OneNANDState),
 186         VMSTATE_UINT16_ARRAY(ecc.lp, OneNANDState, 2),
 187         VMSTATE_UINT16(ecc.count, OneNANDState),
 188         VMSTATE_BUFFER_UNSAFE(otp, OneNANDState, 0, ((64 + 2) << PAGE_SHIFT)),
 189         VMSTATE_END_OF_LIST()
 190     }
 191 };
 192
 193 /* Hot reset (Reset OneNAND command) or warm reset (RP pin low) */
 194 static void onenand_reset(OneNANDState *s, int cold)
 195 {
 196     memset(&s->addr, 0, sizeof(s->addr));
 197     s->command = 0;
 198     s->count = 1;
 199     s->bufaddr = 0;
 200     s->config[0] = 0x40c0;
 201     s->config[1] = 0x0000;
 202     onenand_intr_update(s);
 203     qemu_irq_raise(s->rdy);
 204     s->status = 0x0000;
 205     s->intstatus = cold ? 0x8080 : 0x8010;
 206     s->unladdr[0] = 0;
 207     s->unladdr[1] = 0;
 208     s->wpstatus = 0x0002;
 209     s->cycle = 0;
 210     s->otpmode = 0;
 211     s->bdrv_cur = s->bdrv;
 212     s->current = s->image;
 213     s->secs_cur = s->secs;
 214
 215     if (cold) {
 216         /* Lock the whole flash */
 217         memset(s->blockwp, ONEN_LOCK_LOCKED, s->blocks);
 218
 219         if (s->bdrv_cur && bdrv_read(s->bdrv_cur, 0, s->boot[0], 8) < 0) {
 220             hw_error("%s: Loading the BootRAM failed.\n", __func__);
 221         }
 222     }
 223 }
 224
 225 static void onenand_system_reset(DeviceState *dev)
 226 {
 227     onenand_reset(FROM_SYSBUS(OneNANDState, SYS_BUS_DEVICE(dev)), 1);
 228 }
 229
 230 static inline int onenand_load_main(OneNANDState *s, int sec, int secn,
 231                 void *dest)
 232 {
 233     if (s->bdrv_cur)
 234         return bdrv_read(s->bdrv_cur, sec, dest, secn) < 0;
 235     else if (sec + secn > s->secs_cur)
 236         return 1;
 237
 238     memcpy(dest, s->current + (sec << 9), secn << 9);
 239
 240     return 0;
 241 }
 242
 243 static inline int onenand_prog_main(OneNANDState *s, int sec, int secn,
 244                 void *src)
 245 {
 246     int result = 0;
 247
 248     if (secn > 0) {
 249         uint32_t size = (uint32_t)secn * 512;
 250         const uint8_t *sp = (const uint8_t *)src;
 251         uint8_t *dp = 0;
 252         if (s->bdrv_cur) {
 253             dp = g_malloc(size);
 254             if (!dp || bdrv_read(s->bdrv_cur, sec, dp, secn) < 0) {
 255                 result = 1;
 256             }
 257         } else {
 258             if (sec + secn > s->secs_cur) {
 259                 result = 1;
 260             } else {
 261                 dp = (uint8_t *)s->current + (sec << 9);
 262             }
 263         }
 264         if (!result) {
 265             uint32_t i;
 266             for (i = 0; i < size; i++) {
 267                 dp[i] &= sp[i];
 268             }
 269             if (s->bdrv_cur) {
 270                 result = bdrv_write(s->bdrv_cur, sec, dp, secn) < 0;
 271             }
 272         }
 273         if (dp && s->bdrv_cur) {
 274             g_free(dp);
 275         }
 276     }
 277
 278     return result;
 279 }
 280
 281 static inline int onenand_load_spare(OneNANDState *s, int sec, int secn,
 282                 void *dest)
 283 {
 284     uint8_t buf[512];
 285
 286     if (s->bdrv_cur) {
 287         if (bdrv_read(s->bdrv_cur, s->secs_cur + (sec >> 5), buf, 1) < 0)
 288             return 1;
 289         memcpy(dest, buf + ((sec & 31) << 4), secn << 4);
 290     } else if (sec + secn > s->secs_cur)
 291         return 1;
 292     else
 293         memcpy(dest, s->current + (s->secs_cur << 9) + (sec << 4), secn << 4);
 294
 295     return 0;
 296 }
 297
 298 static inline int onenand_prog_spare(OneNANDState *s, int sec, int secn,
 299                 void *src)
 300 {
 301     int result = 0;
 302     if (secn > 0) {
 303         const uint8_t *sp = (const uint8_t *)src;
 304         uint8_t *dp = 0, *dpp = 0;
 305         if (s->bdrv_cur) {
 306             dp = g_malloc(512);
 307             if (!dp || bdrv_read(s->bdrv_cur,
 308                                  s->secs_cur + (sec >> 5),
 309                                  dp, 1) < 0) {
 310                 result = 1;
 311             } else {
 312                 dpp = dp + ((sec & 31) << 4);
 313             }
 314         } else {
 315             if (sec + secn > s->secs_cur) {
 316                 result = 1;
 317             } else {
 318                 dpp = s->current + (s->secs_cur << 9) + (sec << 4);
 319             }
 320         }
 321         if (!result) {
 322             uint32_t i;
 323             for (i = 0; i < (secn << 4); i++) {
 324                 dpp[i] &= sp[i];
 325             }
 326             if (s->bdrv_cur) {
 327                 result = bdrv_write(s->bdrv_cur, s->secs_cur + (sec >> 5),
 328                                     dp, 1) < 0;
 329             }
 330         }
 331         if (dp) {
 332             g_free(dp);
 333         }
 334     }
 335     return result;
 336 }
 337
 338 static inline int onenand_erase(OneNANDState *s, int sec, int num)
 339 {
 340     uint8_t *blankbuf, *tmpbuf;
 341     blankbuf = g_malloc(512);
 342     if (!blankbuf) {
 343         return 1;
 344     }
 345     tmpbuf = g_malloc(512);
 346     if (!tmpbuf) {
 347         g_free(blankbuf);
 348         return 1;
 349     }
 350     memset(blankbuf, 0xff, 512);
 351     for (; num > 0; num--, sec++) {
 352         if (s->bdrv_cur) {
 353             int erasesec = s->secs_cur + (sec >> 5);
 354             if (bdrv_write(s->bdrv_cur, sec, blankbuf, 1) < 0) {
 355                 goto fail;
 356             }
 357             if (bdrv_read(s->bdrv_cur, erasesec, tmpbuf, 1) < 0) {
 358                 goto fail;
 359             }
 360             memcpy(tmpbuf + ((sec & 31) << 4), blankbuf, 1 << 4);
 361             if (bdrv_write(s->bdrv_cur, erasesec, tmpbuf, 1) < 0) {
 362                 goto fail;
 363             }
 364         } else {
 365             if (sec + 1 > s->secs_cur) {
 366                 goto fail;
 367             }
 368             memcpy(s->current + (sec << 9), blankbuf, 512);
 369             memcpy(s->current + (s->secs_cur << 9) + (sec << 4),
 370                    blankbuf, 1 << 4);
 371         }
 372     }
 373
 374     g_free(tmpbuf);
 375     g_free(blankbuf);
 376     return 0;
 377
 378 fail:
 379     g_free(tmpbuf);
 380     g_free(blankbuf);
 381     return 1;
 382 }
 383
 384 static void onenand_command(OneNANDState *s)
 385 {
 386     int b;
 387     int sec;
 388     void *buf;
 389 #define SETADDR(block, page)                    \
 390     sec = (s->addr[page] & 3) +                 \
 391             ((((s->addr[page] >> 2) & 0x3f) +   \
 392               (((s->addr[block] & 0xfff) |      \
 393                 (s->addr[block] >> 15 ?         \
 394                  s->density_mask : 0)) << 6)) << (PAGE_SHIFT - 9));
 395 #define SETBUF_M()                              \
 396     buf = (s->bufaddr & 8) ?                    \
 397             s->data[(s->bufaddr >> 2) & 1][0] : s->boot[0];     \
 398     buf += (s->bufaddr & 3) << 9;
 399 #define SETBUF_S()                              \
 400     buf = (s->bufaddr & 8) ?                    \
 401             s->data[(s->bufaddr >> 2) & 1][1] : s->boot[1];     \
 402     buf += (s->bufaddr & 3) << 4;
 403
 404     switch (s->command) {
 405     case 0x00:  /* Load single/multiple sector data unit into buffer */
 406         SETADDR(ONEN_BUF_BLOCK, ONEN_BUF_PAGE)
 407
 408         SETBUF_M()
 409         if (onenand_load_main(s, sec, s->count, buf))
 410             s->status |= ONEN_ERR_CMD | ONEN_ERR_LOAD;
 411
 412 #if 0
 413         SETBUF_S()
 414         if (onenand_load_spare(s, sec, s->count, buf))
 415             s->status |= ONEN_ERR_CMD | ONEN_ERR_LOAD;
 416 #endif
 417
 418         /* TODO: if (s->bufaddr & 3) + s->count was > 4 (2k-pages)
 419          * or    if (s->bufaddr & 1) + s->count was > 2 (1k-pages)
 420          * then we need two split the read/write into two chunks.
 421          */
 422         s->intstatus |= ONEN_INT | ONEN_INT_LOAD;
 423         break;
 424     case 0x13:  /* Load single/multiple spare sector into buffer */
 425         SETADDR(ONEN_BUF_BLOCK, ONEN_BUF_PAGE)
 426
 427         SETBUF_S()
 428         if (onenand_load_spare(s, sec, s->count, buf))
 429             s->status |= ONEN_ERR_CMD | ONEN_ERR_LOAD;
 430
 431         /* TODO: if (s->bufaddr & 3) + s->count was > 4 (2k-pages)
 432          * or    if (s->bufaddr & 1) + s->count was > 2 (1k-pages)
 433          * then we need two split the read/write into two chunks.
 434          */
 435         s->intstatus |= ONEN_INT | ONEN_INT_LOAD;
 436         break;
 437     case 0x80:  /* Program single/multiple sector data unit from buffer */
 438         SETADDR(ONEN_BUF_BLOCK, ONEN_BUF_PAGE)
 439
 440         SETBUF_M()
 441         if (onenand_prog_main(s, sec, s->count, buf))
 442             s->status |= ONEN_ERR_CMD | ONEN_ERR_PROG;
 443
 444 #if 0
 445         SETBUF_S()
 446         if (onenand_prog_spare(s, sec, s->count, buf))
 447             s->status |= ONEN_ERR_CMD | ONEN_ERR_PROG;
 448 #endif
 449
 450         /* TODO: if (s->bufaddr & 3) + s->count was > 4 (2k-pages)
 451          * or    if (s->bufaddr & 1) + s->count was > 2 (1k-pages)
 452          * then we need two split the read/write into two chunks.
 453          */
 454         s->intstatus |= ONEN_INT | ONEN_INT_PROG;
 455         break;
 456     case 0x1a:  /* Program single/multiple spare area sector from buffer */
 457         SETADDR(ONEN_BUF_BLOCK, ONEN_BUF_PAGE)
 458
 459         SETBUF_S()
 460         if (onenand_prog_spare(s, sec, s->count, buf))
 461             s->status |= ONEN_ERR_CMD | ONEN_ERR_PROG;
 462
 463         /* TODO: if (s->bufaddr & 3) + s->count was > 4 (2k-pages)
 464          * or    if (s->bufaddr & 1) + s->count was > 2 (1k-pages)
 465          * then we need two split the read/write into two chunks.
 466          */
 467         s->intstatus |= ONEN_INT | ONEN_INT_PROG;
 468         break;
 469     case 0x1b:  /* Copy-back program */
 470         SETBUF_S()
 471
 472         SETADDR(ONEN_BUF_BLOCK, ONEN_BUF_PAGE)
 473         if (onenand_load_main(s, sec, s->count, buf))
 474             s->status |= ONEN_ERR_CMD | ONEN_ERR_PROG;
 475
 476         SETADDR(ONEN_BUF_DEST_BLOCK, ONEN_BUF_DEST_PAGE)
 477         if (onenand_prog_main(s, sec, s->count, buf))
 478             s->status |= ONEN_ERR_CMD | ONEN_ERR_PROG;
 479
 480         /* TODO: spare areas */
 481
 482         s->intstatus |= ONEN_INT | ONEN_INT_PROG;
 483         break;
 484
 485     case 0x23:  /* Unlock NAND array block(s) */
 486         s->intstatus |= ONEN_INT;
 487
 488         /* XXX the previous (?) area should be locked automatically */
 489         for (b = s->unladdr[0]; b <= s->unladdr[1]; b ++) {
 490             if (b >= s->blocks) {
 491                 s->status |= ONEN_ERR_CMD;
 492                 break;
 493             }
 494             if (s->blockwp[b] == ONEN_LOCK_LOCKTIGHTEN)
 495                 break;
 496
 497             s->wpstatus = s->blockwp[b] = ONEN_LOCK_UNLOCKED;
 498         }
 499         break;
 500     case 0x27:  /* Unlock All NAND array blocks */
 501         s->intstatus |= ONEN_INT;
 502
 503         for (b = 0; b < s->blocks; b ++) {
 504             if (b >= s->blocks) {
 505                 s->status |= ONEN_ERR_CMD;
 506                 break;
 507             }
 508             if (s->blockwp[b] == ONEN_LOCK_LOCKTIGHTEN)
 509                 break;
 510
 511             s->wpstatus = s->blockwp[b] = ONEN_LOCK_UNLOCKED;
 512         }
 513         break;
 514
 515     case 0x2a:  /* Lock NAND array block(s) */
 516         s->intstatus |= ONEN_INT;
 517
 518         for (b = s->unladdr[0]; b <= s->unladdr[1]; b ++) {
 519             if (b >= s->blocks) {
 520                 s->status |= ONEN_ERR_CMD;
 521                 break;
 522             }
 523             if (s->blockwp[b] == ONEN_LOCK_LOCKTIGHTEN)
 524                 break;
 525
 526             s->wpstatus = s->blockwp[b] = ONEN_LOCK_LOCKED;
 527         }
 528         break;
 529     case 0x2c:  /* Lock-tight NAND array block(s) */
 530         s->intstatus |= ONEN_INT;
 531
 532         for (b = s->unladdr[0]; b <= s->unladdr[1]; b ++) {
 533             if (b >= s->blocks) {
 534                 s->status |= ONEN_ERR_CMD;
 535                 break;
 536             }
 537             if (s->blockwp[b] == ONEN_LOCK_UNLOCKED)
 538                 continue;
 539
 540             s->wpstatus = s->blockwp[b] = ONEN_LOCK_LOCKTIGHTEN;
 541         }
 542         break;
 543
 544     case 0x71:  /* Erase-Verify-Read */
 545         s->intstatus |= ONEN_INT;
 546         break;
 547     case 0x95:  /* Multi-block erase */
 548         qemu_irq_pulse(s->intr);
 549         /* Fall through.  */
 550     case 0x94:  /* Block erase */
 551         sec = ((s->addr[ONEN_BUF_BLOCK] & 0xfff) |
 552                         (s->addr[ONEN_BUF_BLOCK] >> 15 ? s->density_mask : 0))
 553                 << (BLOCK_SHIFT - 9);
 554         if (onenand_erase(s, sec, 1 << (BLOCK_SHIFT - 9)))
 555             s->status |= ONEN_ERR_CMD | ONEN_ERR_ERASE;
 556
 557         s->intstatus |= ONEN_INT | ONEN_INT_ERASE;
 558         break;
 559     case 0xb0:  /* Erase suspend */
 560         break;
 561     case 0x30:  /* Erase resume */
 562         s->intstatus |= ONEN_INT | ONEN_INT_ERASE;
 563         break;
 564
 565     case 0xf0:  /* Reset NAND Flash core */
 566         onenand_reset(s, 0);
 567         break;
 568     case 0xf3:  /* Reset OneNAND */
 569         onenand_reset(s, 0);
 570         break;
 571
 572     case 0x65:  /* OTP Access */
 573         s->intstatus |= ONEN_INT;
 574         s->bdrv_cur = NULL;
 575         s->current = s->otp;
 576         s->secs_cur = 1 << (BLOCK_SHIFT - 9);
 577         s->addr[ONEN_BUF_BLOCK] = 0;
 578         s->otpmode = 1;
 579         break;
 580
 581     default:
 582         s->status |= ONEN_ERR_CMD;
 583         s->intstatus |= ONEN_INT;
 584         fprintf(stderr, "%s: unknown OneNAND command %x\n",
 585                         __func__, s->command);
 586     }
 587
 588     onenand_intr_update(s);
 589 }
 590
 591 static uint64_t onenand_read(void *opaque, hwaddr addr,
 592                              unsigned size)
 593 {
 594     OneNANDState *s = (OneNANDState *) opaque;
 595     int offset = addr >> s->shift;
 596
 597     switch (offset) {
 598     case 0x0000 ... 0xc000:
 599         return lduw_le_p(s->boot[0] + addr);
 600
 601     case 0xf000:        /* Manufacturer ID */
 602         return s->id.man;
 603     case 0xf001:        /* Device ID */
 604         return s->id.dev;
 605     case 0xf002:        /* Version ID */
 606         return s->id.ver;
 607     /* TODO: get the following values from a real chip!  */
 608     case 0xf003:        /* Data Buffer size */
 609         return 1 << PAGE_SHIFT;
 610     case 0xf004:        /* Boot Buffer size */
 611         return 0x200;
 612     case 0xf005:        /* Amount of buffers */
 613         return 1 | (2 << 8);
 614     case 0xf006:        /* Technology */
 615         return 0;
 616
 617     case 0xf100 ... 0xf107:     /* Start addresses */
 618         return s->addr[offset - 0xf100];
 619
 620     case 0xf200:        /* Start buffer */
 621         return (s->bufaddr << 8) | ((s->count - 1) & (1 << (PAGE_SHIFT - 10)));
 622
 623     case 0xf220:        /* Command */
 624         return s->command;
 625     case 0xf221:        /* System Configuration 1 */
 626         return s->config[0] & 0xffe0;
 627     case 0xf222:        /* System Configuration 2 */
 628         return s->config[1];
 629
 630     case 0xf240:        /* Controller Status */
 631         return s->status;
 632     case 0xf241:        /* Interrupt */
 633         return s->intstatus;
 634     case 0xf24c:        /* Unlock Start Block Address */
 635         return s->unladdr[0];
 636     case 0xf24d:        /* Unlock End Block Address */
 637         return s->unladdr[1];
 638     case 0xf24e:        /* Write Protection Status */
 639         return s->wpstatus;
 640
 641     case 0xff00:        /* ECC Status */
 642         return 0x00;
 643     case 0xff01:        /* ECC Result of main area data */
 644     case 0xff02:        /* ECC Result of spare area data */
 645     case 0xff03:        /* ECC Result of main area data */
 646     case 0xff04:        /* ECC Result of spare area data */
 647         hw_error("%s: imeplement ECC\n", __FUNCTION__);
 648         return 0x0000;
 649     }
 650
 651     fprintf(stderr, "%s: unknown OneNAND register %x\n",
 652                     __FUNCTION__, offset);
 653     return 0;
 654 }
 655
 656 static void onenand_write(void *opaque, hwaddr addr,
 657                           uint64_t value, unsigned size)
 658 {
 659     OneNANDState *s = (OneNANDState *) opaque;
 660     int offset = addr >> s->shift;
 661     int sec;
 662
 663     switch (offset) {
 664     case 0x0000 ... 0x01ff:
 665     case 0x8000 ... 0x800f:
 666         if (s->cycle) {
 667             s->cycle = 0;
 668
 669             if (value == 0x0000) {
 670                 SETADDR(ONEN_BUF_BLOCK, ONEN_BUF_PAGE)
 671                 onenand_load_main(s, sec,
 672                                 1 << (PAGE_SHIFT - 9), s->data[0][0]);
 673                 s->addr[ONEN_BUF_PAGE] += 4;
 674                 s->addr[ONEN_BUF_PAGE] &= 0xff;
 675             }
 676             break;
 677         }
 678
 679         switch (value) {
 680         case 0x00f0:    /* Reset OneNAND */
 681             onenand_reset(s, 0);
 682             break;
 683
 684         case 0x00e0:    /* Load Data into Buffer */
 685             s->cycle = 1;
 686             break;
 687
 688         case 0x0090:    /* Read Identification Data */
 689             memset(s->boot[0], 0, 3 << s->shift);
 690             s->boot[0][0 << s->shift] = s->id.man & 0xff;
 691             s->boot[0][1 << s->shift] = s->id.dev & 0xff;
 692             s->boot[0][2 << s->shift] = s->wpstatus & 0xff;
 693             break;
 694
 695         default:
 696             fprintf(stderr, "%s: unknown OneNAND boot command %"PRIx64"\n",
 697                             __FUNCTION__, value);
 698         }
 699         break;
 700
 701     case 0xf100 ... 0xf107:     /* Start addresses */
 702         s->addr[offset - 0xf100] = value;
 703         break;
 704
 705     case 0xf200:        /* Start buffer */
 706         s->bufaddr = (value >> 8) & 0xf;
 707         if (PAGE_SHIFT == 11)
 708             s->count = (value & 3) ?: 4;
 709         else if (PAGE_SHIFT == 10)
 710             s->count = (value & 1) ?: 2;
 711         break;
 712
 713     case 0xf220:        /* Command */
 714         if (s->intstatus & (1 << 15))
 715             break;
 716         s->command = value;
 717         onenand_command(s);
 718         break;
 719     case 0xf221:        /* System Configuration 1 */
 720         s->config[0] = value;
 721         onenand_intr_update(s);
 722         qemu_set_irq(s->rdy, (s->config[0] >> 7) & 1);
 723         break;
 724     case 0xf222:        /* System Configuration 2 */
 725         s->config[1] = value;
 726         break;
 727
 728     case 0xf241:        /* Interrupt */
 729         s->intstatus &= value;
 730         if ((1 << 15) & ~s->intstatus)
 731             s->status &= ~(ONEN_ERR_CMD | ONEN_ERR_ERASE |
 732                             ONEN_ERR_PROG | ONEN_ERR_LOAD);
 733         onenand_intr_update(s);
 734         break;
 735     case 0xf24c:        /* Unlock Start Block Address */
 736         s->unladdr[0] = value & (s->blocks - 1);
 737         /* For some reason we have to set the end address to by default
 738          * be same as start because the software forgets to write anything
 739          * in there.  */
 740         s->unladdr[1] = value & (s->blocks - 1);
 741         break;
 742     case 0xf24d:        /* Unlock End Block Address */
 743         s->unladdr[1] = value & (s->blocks - 1);
 744         break;
 745
 746     default:
 747         fprintf(stderr, "%s: unknown OneNAND register %x\n",
 748                         __FUNCTION__, offset);
 749     }
 750 }
 751
 752 static const MemoryRegionOps onenand_ops = {
 753     .read = onenand_read,
 754     .write = onenand_write,
 755     .endianness = DEVICE_NATIVE_ENDIAN,
 756 };
 757
 758 static int onenand_initfn(SysBusDevice *dev)
 759 {
 760     OneNANDState *s = (OneNANDState *)dev;
 761     uint32_t size = 1 << (24 + ((s->id.dev >> 4) & 7));
 762     void *ram;
 763     s->base = (hwaddr)-1;
 764     s->rdy = NULL;
 765     s->blocks = size >> BLOCK_SHIFT;
 766     s->secs = size >> 9;
 767     s->blockwp = g_malloc(s->blocks);
 768     s->density_mask = (s->id.dev & 0x08)
 769         ? (1 << (6 + ((s->id.dev >> 4) & 7))) : 0;
 770     memory_region_init_io(&s->iomem, &onenand_ops, s, "onenand",
 771                           0x10000 << s->shift);
 772     if (!s->bdrv) {
 773         s->image = memset(g_malloc(size + (size >> 5)),
 774                           0xff, size + (size >> 5));
 775     } else {
 776         if (bdrv_is_read_only(s->bdrv)) {
 777             error_report("Can't use a read-only drive");
 778             return -1;
 779         }
 780         s->bdrv_cur = s->bdrv;
 781     }
 782     s->otp = memset(g_malloc((64 + 2) << PAGE_SHIFT),
 783                     0xff, (64 + 2) << PAGE_SHIFT);
 784     memory_region_init_ram(&s->ram, "onenand.ram", 0xc000 << s->shift);
 785     vmstate_register_ram_global(&s->ram);
 786     ram = memory_region_get_ram_ptr(&s->ram);
 787     s->boot[0] = ram + (0x0000 << s->shift);
 788     s->boot[1] = ram + (0x8000 << s->shift);
 789     s->data[0][0] = ram + ((0x0200 + (0 << (PAGE_SHIFT - 1))) << s->shift);
 790     s->data[0][1] = ram + ((0x8010 + (0 << (PAGE_SHIFT - 6))) << s->shift);
 791     s->data[1][0] = ram + ((0x0200 + (1 << (PAGE_SHIFT - 1))) << s->shift);
 792     s->data[1][1] = ram + ((0x8010 + (1 << (PAGE_SHIFT - 6))) << s->shift);
 793     onenand_mem_setup(s);
 794     sysbus_init_irq(dev, &s->intr);
 795     sysbus_init_mmio(dev, &s->container);
 796     vmstate_register(&dev->qdev,
 797                      ((s->shift & 0x7f) << 24)
 798                      | ((s->id.man & 0xff) << 16)
 799                      | ((s->id.dev & 0xff) << 8)
 800                      | (s->id.ver & 0xff),
 801                      &vmstate_onenand, s);
 802     return 0;
 803 }
 804
 805 static Property onenand_properties[] = {
 806     DEFINE_PROP_UINT16("manufacturer_id", OneNANDState, id.man, 0),
 807     DEFINE_PROP_UINT16("device_id", OneNANDState, id.dev, 0),
 808     DEFINE_PROP_UINT16("version_id", OneNANDState, id.ver, 0),
 809     DEFINE_PROP_INT32("shift", OneNANDState, shift, 0),
 810     DEFINE_PROP_DRIVE("drive", OneNANDState, bdrv),
 811     DEFINE_PROP_END_OF_LIST(),
 812 };
 813
 814 static void onenand_class_init(ObjectClass *klass, void *data)
 815 {
 816     DeviceClass *dc = DEVICE_CLASS(klass);
 817     SysBusDeviceClass *k = SYS_BUS_DEVICE_CLASS(klass);
 818
 819     k->init = onenand_initfn;
 820     dc->reset = onenand_system_reset;
 821     dc->props = onenand_properties;
 822 }
 823
 824 static const TypeInfo onenand_info = {
 825     .name          = "onenand",
 826     .parent        = TYPE_SYS_BUS_DEVICE,
 827     .instance_size = sizeof(OneNANDState),
 828     .class_init    = onenand_class_init,
 829 };
 830
 831 static void onenand_register_types(void)
 832 {
 833     type_register_static(&onenand_info);
 834 }
 835
 836 void *onenand_raw_otp(DeviceState *onenand_device)
 837 {
 838     return FROM_SYSBUS(OneNANDState, SYS_BUS_DEVICE(onenand_device))->otp;
 839 }
 840
 841 type_init(onenand_register_types)