drivers/mtd/devices/lart.c

   1
   2 /*
   3  * MTD driver for the 28F160F3 Flash Memory (non-CFI) on LART.
   4  *
   5  * Author: Abraham vd Merwe <abraham@2d3d.co.za>
   6  *
   7  * Copyright (c) 2001, 2d3D, Inc.
   8  *
   9  * This code is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License version 2 as
  11  * published by the Free Software Foundation.
  12  *
  13  * References:
  14  *
  15  *    [1] 3 Volt Fast Boot Block Flash Memory" Intel Datasheet
  16  *           - Order Number: 290644-005
  17  *           - January 2000
  18  *
  19  *    [2] MTD internal API documentation
  20  *           - http://www.linux-mtd.infradead.org/
  21  *
  22  * Limitations:
  23  *
  24  *    Even though this driver is written for 3 Volt Fast Boot
  25  *    Block Flash Memory, it is rather specific to LART. With
  26  *    Minor modifications, notably the without data/address line
  27  *    mangling and different bus settings, etc. it should be
  28  *    trivial to adapt to other platforms.
  29  *
  30  *    If somebody would sponsor me a different board, I'll
  31  *    adapt the driver (:
  32  */
  33
  34 /* debugging */
  35 //#define LART_DEBUG
  36
  37 /* partition support */
  38 #define HAVE_PARTITIONS
  39
  40 #include <linux/kernel.h>
  41 #include <linux/module.h>
  42 #include <linux/types.h>
  43 #include <linux/init.h>
  44 #include <linux/errno.h>
  45 #include <linux/string.h>
  46 #include <linux/mtd/mtd.h>
  47 #ifdef HAVE_PARTITIONS
  48 #include <linux/mtd/partitions.h>
  49 #endif
  50
  51 #ifndef CONFIG_SA1100_LART
  52 #error This is for LART architecture only
  53 #endif
  54
  55 static char module_name[] = "lart";
  56
  57 /*
  58  * These values is specific to 28Fxxxx3 flash memory.
  59  * See section 2.3.1 in "3 Volt Fast Boot Block Flash Memory" Intel Datasheet
  60  */
  61 #define FLASH_BLOCKSIZE_PARAM           (4096 * BUSWIDTH)
  62 #define FLASH_NUMBLOCKS_16m_PARAM       8
  63 #define FLASH_NUMBLOCKS_8m_PARAM        8
  64
  65 /*
  66  * These values is specific to 28Fxxxx3 flash memory.
  67  * See section 2.3.2 in "3 Volt Fast Boot Block Flash Memory" Intel Datasheet
  68  */
  69 #define FLASH_BLOCKSIZE_MAIN            (32768 * BUSWIDTH)
  70 #define FLASH_NUMBLOCKS_16m_MAIN        31
  71 #define FLASH_NUMBLOCKS_8m_MAIN         15
  72
  73 /*
  74  * These values are specific to LART
  75  */
  76
  77 /* general */
  78 #define BUSWIDTH                        4                               /* don't change this - a lot of the code _will_ break if you change this */
  79 #define FLASH_OFFSET            0xe8000000              /* see linux/arch/arm/mach-sa1100/lart.c */
  80
  81 /* blob */
  82 #define NUM_BLOB_BLOCKS         FLASH_NUMBLOCKS_16m_PARAM
  83 #define BLOB_START                      0x00000000
  84 #define BLOB_LEN                        (NUM_BLOB_BLOCKS * FLASH_BLOCKSIZE_PARAM)
  85
  86 /* kernel */
  87 #define NUM_KERNEL_BLOCKS       7
  88 #define KERNEL_START            (BLOB_START + BLOB_LEN)
  89 #define KERNEL_LEN                      (NUM_KERNEL_BLOCKS * FLASH_BLOCKSIZE_MAIN)
  90
  91 /* initial ramdisk */
  92 #define NUM_INITRD_BLOCKS       24
  93 #define INITRD_START            (KERNEL_START + KERNEL_LEN)
  94 #define INITRD_LEN                      (NUM_INITRD_BLOCKS * FLASH_BLOCKSIZE_MAIN)
  95
  96 /*
  97  * See section 4.0 in "3 Volt Fast Boot Block Flash Memory" Intel Datasheet
  98  */
  99 #define READ_ARRAY                      0x00FF00FF              /* Read Array/Reset */
 100 #define READ_ID_CODES           0x00900090              /* Read Identifier Codes */
 101 #define ERASE_SETUP                     0x00200020              /* Block Erase */
 102 #define ERASE_CONFIRM           0x00D000D0              /* Block Erase and Program Resume */
 103 #define PGM_SETUP                       0x00400040              /* Program */
 104 #define STATUS_READ                     0x00700070              /* Read Status Register */
 105 #define STATUS_CLEAR            0x00500050              /* Clear Status Register */
 106 #define STATUS_BUSY                     0x00800080              /* Write State Machine Status (WSMS) */
 107 #define STATUS_ERASE_ERR        0x00200020              /* Erase Status (ES) */
 108 #define STATUS_PGM_ERR          0x00100010              /* Program Status (PS) */
 109
 110 /*
 111  * See section 4.2 in "3 Volt Fast Boot Block Flash Memory" Intel Datasheet
 112  */
 113 #define FLASH_MANUFACTURER                      0x00890089
 114 #define FLASH_DEVICE_8mbit_TOP          0x88f188f1
 115 #define FLASH_DEVICE_8mbit_BOTTOM       0x88f288f2
 116 #define FLASH_DEVICE_16mbit_TOP         0x88f388f3
 117 #define FLASH_DEVICE_16mbit_BOTTOM      0x88f488f4
 118
 119 /***************************************************************************************************/
 120
 121 /*
 122  * The data line mapping on LART is as follows:
 123  *
 124  *       U2  CPU |   U3  CPU
 125  *       -------------------
 126  *        0  20  |   0   12
 127  *        1  22  |   1   14
 128  *        2  19  |   2   11
 129  *        3  17  |   3   9
 130  *        4  24  |   4   0
 131  *        5  26  |   5   2
 132  *        6  31  |   6   7
 133  *        7  29  |   7   5
 134  *        8  21  |   8   13
 135  *        9  23  |   9   15
 136  *        10 18  |   10  10
 137  *        11 16  |   11  8
 138  *        12 25  |   12  1
 139  *        13 27  |   13  3
 140  *        14 30  |   14  6
 141  *        15 28  |   15  4
 142  */
 143
 144 /* Mangle data (x) */
 145 #define DATA_TO_FLASH(x)                                \
 146         (                                                                       \
 147                 (((x) & 0x08009000) >> 11)      +       \
 148                 (((x) & 0x00002000) >> 10)      +       \
 149                 (((x) & 0x04004000) >> 8)       +       \
 150                 (((x) & 0x00000010) >> 4)       +       \
 151                 (((x) & 0x91000820) >> 3)       +       \
 152                 (((x) & 0x22080080) >> 2)       +       \
 153                 ((x) & 0x40000400)                      +       \
 154                 (((x) & 0x00040040) << 1)       +       \
 155                 (((x) & 0x00110000) << 4)       +       \
 156                 (((x) & 0x00220100) << 5)       +       \
 157                 (((x) & 0x00800208) << 6)       +       \
 158                 (((x) & 0x00400004) << 9)       +       \
 159                 (((x) & 0x00000001) << 12)      +       \
 160                 (((x) & 0x00000002) << 13)              \
 161         )
 162
 163 /* Unmangle data (x) */
 164 #define FLASH_TO_DATA(x)                                \
 165         (                                                                       \
 166                 (((x) & 0x00010012) << 11)      +       \
 167                 (((x) & 0x00000008) << 10)      +       \
 168                 (((x) & 0x00040040) << 8)       +       \
 169                 (((x) & 0x00000001) << 4)       +       \
 170                 (((x) & 0x12200104) << 3)       +       \
 171                 (((x) & 0x08820020) << 2)       +       \
 172                 ((x) & 0x40000400)                      +       \
 173                 (((x) & 0x00080080) >> 1)       +       \
 174                 (((x) & 0x01100000) >> 4)       +       \
 175                 (((x) & 0x04402000) >> 5)       +       \
 176                 (((x) & 0x20008200) >> 6)       +       \
 177                 (((x) & 0x80000800) >> 9)       +       \
 178                 (((x) & 0x00001000) >> 12)      +       \
 179                 (((x) & 0x00004000) >> 13)              \
 180         )
 181
 182 /*
 183  * The address line mapping on LART is as follows:
 184  *
 185  *       U3  CPU |   U2  CPU
 186  *       -------------------
 187  *        0  2   |   0   2
 188  *        1  3   |   1   3
 189  *        2  9   |   2   9
 190  *        3  13  |   3   8
 191  *        4  8   |   4   7
 192  *        5  12  |   5   6
 193  *        6  11  |   6   5
 194  *        7  10  |   7   4
 195  *        8  4   |   8   10
 196  *        9  5   |   9   11
 197  *       10  6   |   10  12
 198  *       11  7   |   11  13
 199  *
 200  *       BOOT BLOCK BOUNDARY
 201  *
 202  *       12  15  |   12  15
 203  *       13  14  |   13  14
 204  *       14  16  |   14  16
 205  *
 206  *       MAIN BLOCK BOUNDARY
 207  *
 208  *       15  17  |   15  18
 209  *       16  18  |   16  17
 210  *       17  20  |   17  20
 211  *       18  19  |   18  19
 212  *       19  21  |   19  21
 213  *
 214  * As we can see from above, the addresses aren't mangled across
 215  * block boundaries, so we don't need to worry about address
 216  * translations except for sending/reading commands during
 217  * initialization
 218  */
 219
 220 /* Mangle address (x) on chip U2 */
 221 #define ADDR_TO_FLASH_U2(x)                             \
 222         (                                                                       \
 223                 (((x) & 0x00000f00) >> 4)       +       \
 224                 (((x) & 0x00042000) << 1)       +       \
 225                 (((x) & 0x0009c003) << 2)       +       \
 226                 (((x) & 0x00021080) << 3)       +       \
 227                 (((x) & 0x00000010) << 4)       +       \
 228                 (((x) & 0x00000040) << 5)       +       \
 229                 (((x) & 0x00000024) << 7)       +       \
 230                 (((x) & 0x00000008) << 10)              \
 231         )
 232
 233 /* Unmangle address (x) on chip U2 */
 234 #define FLASH_U2_TO_ADDR(x)                             \
 235         (                                                                       \
 236                 (((x) << 4) & 0x00000f00)       +       \
 237                 (((x) >> 1) & 0x00042000)       +       \
 238                 (((x) >> 2) & 0x0009c003)       +       \
 239                 (((x) >> 3) & 0x00021080)       +       \
 240                 (((x) >> 4) & 0x00000010)       +       \
 241                 (((x) >> 5) & 0x00000040)       +       \
 242                 (((x) >> 7) & 0x00000024)       +       \
 243                 (((x) >> 10) & 0x00000008)              \
 244         )
 245
 246 /* Mangle address (x) on chip U3 */
 247 #define ADDR_TO_FLASH_U3(x)                             \
 248         (                                                                       \
 249                 (((x) & 0x00000080) >> 3)       +       \
 250                 (((x) & 0x00000040) >> 1)       +       \
 251                 (((x) & 0x00052020) << 1)       +       \
 252                 (((x) & 0x00084f03) << 2)       +       \
 253                 (((x) & 0x00029010) << 3)       +       \
 254                 (((x) & 0x00000008) << 5)       +       \
 255                 (((x) & 0x00000004) << 7)               \
 256         )
 257
 258 /* Unmangle address (x) on chip U3 */
 259 #define FLASH_U3_TO_ADDR(x)                             \
 260         (                                                                       \
 261                 (((x) << 3) & 0x00000080)       +       \
 262                 (((x) << 1) & 0x00000040)       +       \
 263                 (((x) >> 1) & 0x00052020)       +       \
 264                 (((x) >> 2) & 0x00084f03)       +       \
 265                 (((x) >> 3) & 0x00029010)       +       \
 266                 (((x) >> 5) & 0x00000008)       +       \
 267                 (((x) >> 7) & 0x00000004)               \
 268         )
 269
 270 /***************************************************************************************************/
 271
 272 static __u8 read8 (__u32 offset)
 273 {
 274    volatile __u8 *data = (__u8 *) (FLASH_OFFSET + offset);
 275 #ifdef LART_DEBUG
 276    printk (KERN_DEBUG "%s(): 0x%.8x -> 0x%.2x\n", __func__, offset, *data);
 277 #endif
 278    return (*data);
 279 }
 280
 281 static __u32 read32 (__u32 offset)
 282 {
 283    volatile __u32 *data = (__u32 *) (FLASH_OFFSET + offset);
 284 #ifdef LART_DEBUG
 285    printk (KERN_DEBUG "%s(): 0x%.8x -> 0x%.8x\n", __func__, offset, *data);
 286 #endif
 287    return (*data);
 288 }
 289
 290 static void write32 (__u32 x,__u32 offset)
 291 {
 292    volatile __u32 *data = (__u32 *) (FLASH_OFFSET + offset);
 293    *data = x;
 294 #ifdef LART_DEBUG
 295    printk (KERN_DEBUG "%s(): 0x%.8x <- 0x%.8x\n", __func__, offset, *data);
 296 #endif
 297 }
 298
 299 /***************************************************************************************************/
 300
 301 /*
 302  * Probe for 16mbit flash memory on a LART board without doing
 303  * too much damage. Since we need to write 1 dword to memory,
 304  * we're f**cked if this happens to be DRAM since we can't
 305  * restore the memory (otherwise we might exit Read Array mode).
 306  *
 307  * Returns 1 if we found 16mbit flash memory on LART, 0 otherwise.
 308  */
 309 static int flash_probe (void)
 310 {
 311    __u32 manufacturer,devtype;
 312
 313    /* setup "Read Identifier Codes" mode */
 314    write32 (DATA_TO_FLASH (READ_ID_CODES),0x00000000);
 315
 316    /* probe U2. U2/U3 returns the same data since the first 3
 317         * address lines is mangled in the same way */
 318    manufacturer = FLASH_TO_DATA (read32 (ADDR_TO_FLASH_U2 (0x00000000)));
 319    devtype = FLASH_TO_DATA (read32 (ADDR_TO_FLASH_U2 (0x00000001)));
 320
 321    /* put the flash back into command mode */
 322    write32 (DATA_TO_FLASH (READ_ARRAY),0x00000000);
 323
 324    return (manufacturer == FLASH_MANUFACTURER && (devtype == FLASH_DEVICE_16mbit_TOP || devtype == FLASH_DEVICE_16mbit_BOTTOM));
 325 }
 326
 327 /*
 328  * Erase one block of flash memory at offset ``offset'' which is any
 329  * address within the block which should be erased.
 330  *
 331  * Returns 1 if successful, 0 otherwise.
 332  */
 333 static inline int erase_block (__u32 offset)
 334 {
 335    __u32 status;
 336
 337 #ifdef LART_DEBUG
 338    printk (KERN_DEBUG "%s(): 0x%.8x\n", __func__, offset);
 339 #endif
 340
 341    /* erase and confirm */
 342    write32 (DATA_TO_FLASH (ERASE_SETUP),offset);
 343    write32 (DATA_TO_FLASH (ERASE_CONFIRM),offset);
 344
 345    /* wait for block erase to finish */
 346    do
 347          {
 348                 write32 (DATA_TO_FLASH (STATUS_READ),offset);
 349                 status = FLASH_TO_DATA (read32 (offset));
 350          }
 351    while ((~status & STATUS_BUSY) != 0);
 352
 353    /* put the flash back into command mode */
 354    write32 (DATA_TO_FLASH (READ_ARRAY),offset);
 355
 356    /* was the erase successfull? */
 357    if ((status & STATUS_ERASE_ERR))
 358          {
 359                 printk (KERN_WARNING "%s: erase error at address 0x%.8x.\n",module_name,offset);
 360                 return (0);
 361          }
 362
 363    return (1);
 364 }
 365
 366 static int flash_erase (struct mtd_info *mtd,struct erase_info *instr)
 367 {
 368    __u32 addr,len;
 369    int i,first;
 370
 371 #ifdef LART_DEBUG
 372    printk (KERN_DEBUG "%s(addr = 0x%.8x, len = %d)\n", __func__, instr->addr, instr->len);
 373 #endif
 374
 375    /* sanity checks */
 376    if (instr->addr + instr->len > mtd->size) return (-EINVAL);
 377
 378    /*
 379         * check that both start and end of the requested erase are
 380         * aligned with the erasesize at the appropriate addresses.
 381         *
 382         * skip all erase regions which are ended before the start of
 383         * the requested erase. Actually, to save on the calculations,
 384         * we skip to the first erase region which starts after the
 385         * start of the requested erase, and then go back one.
 386         */
 387    for (i = 0; i < mtd->numeraseregions && instr->addr >= mtd->eraseregions[i].offset; i++) ;
 388    i--;
 389
 390    /*
 391         * ok, now i is pointing at the erase region in which this
 392         * erase request starts. Check the start of the requested
 393         * erase range is aligned with the erase size which is in
 394         * effect here.
 395         */
 396    if (i < 0 || (instr->addr & (mtd->eraseregions[i].erasesize - 1)))
 397       return -EINVAL;
 398
 399    /* Remember the erase region we start on */
 400    first = i;
 401
 402    /*
 403         * next, check that the end of the requested erase is aligned
 404         * with the erase region at that address.
 405         *
 406         * as before, drop back one to point at the region in which
 407         * the address actually falls
 408         */
 409    for (; i < mtd->numeraseregions && instr->addr + instr->len >= mtd->eraseregions[i].offset; i++) ;
 410    i--;
 411
 412    /* is the end aligned on a block boundary? */
 413    if (i < 0 || ((instr->addr + instr->len) & (mtd->eraseregions[i].erasesize - 1)))
 414       return -EINVAL;
 415
 416    addr = instr->addr;
 417    len = instr->len;
 418
 419    i = first;
 420
 421    /* now erase those blocks */
 422    while (len)
 423          {
 424                 if (!erase_block (addr))
 425                   {
 426                          instr->state = MTD_ERASE_FAILED;
 427                          return (-EIO);
 428                   }
 429
 430                 addr += mtd->eraseregions[i].erasesize;
 431                 len -= mtd->eraseregions[i].erasesize;
 432
 433                 if (addr == mtd->eraseregions[i].offset + (mtd->eraseregions[i].erasesize * mtd->eraseregions[i].numblocks)) i++;
 434          }
 435
 436    instr->state = MTD_ERASE_DONE;
 437    mtd_erase_callback(instr);
 438
 439    return (0);
 440 }
 441
 442 static int flash_read (struct mtd_info *mtd,loff_t from,size_t len,size_t *retlen,u_char *buf)
 443 {
 444 #ifdef LART_DEBUG
 445    printk (KERN_DEBUG "%s(from = 0x%.8x, len = %d)\n", __func__, (__u32)from, len);
 446 #endif
 447
 448    /* sanity checks */
 449    if (!len) return (0);
 450    if (from + len > mtd->size) return (-EINVAL);
 451
 452    /* we always read len bytes */
 453    *retlen = len;
 454
 455    /* first, we read bytes until we reach a dword boundary */
 456    if (from & (BUSWIDTH - 1))
 457          {
 458                 int gap = BUSWIDTH - (from & (BUSWIDTH - 1));
 459
 460                 while (len && gap--) *buf++ = read8 (from++), len--;
 461          }
 462
 463    /* now we read dwords until we reach a non-dword boundary */
 464    while (len >= BUSWIDTH)
 465          {
 466                 *((__u32 *) buf) = read32 (from);
 467
 468                 buf += BUSWIDTH;
 469                 from += BUSWIDTH;
 470                 len -= BUSWIDTH;
 471          }
 472
 473    /* top up the last unaligned bytes */
 474    if (len & (BUSWIDTH - 1))
 475          while (len--) *buf++ = read8 (from++);
 476
 477    return (0);
 478 }
 479
 480 /*
 481  * Write one dword ``x'' to flash memory at offset ``offset''. ``offset''
 482  * must be 32 bits, i.e. it must be on a dword boundary.
 483  *
 484  * Returns 1 if successful, 0 otherwise.
 485  */
 486 static inline int write_dword (__u32 offset,__u32 x)
 487 {
 488    __u32 status;
 489
 490 #ifdef LART_DEBUG
 491    printk (KERN_DEBUG "%s(): 0x%.8x <- 0x%.8x\n", __func__, offset, x);
 492 #endif
 493
 494    /* setup writing */
 495    write32 (DATA_TO_FLASH (PGM_SETUP),offset);
 496
 497    /* write the data */
 498    write32 (x,offset);
 499
 500    /* wait for the write to finish */
 501    do
 502          {
 503                 write32 (DATA_TO_FLASH (STATUS_READ),offset);
 504                 status = FLASH_TO_DATA (read32 (offset));
 505          }
 506    while ((~status & STATUS_BUSY) != 0);
 507
 508    /* put the flash back into command mode */
 509    write32 (DATA_TO_FLASH (READ_ARRAY),offset);
 510
 511    /* was the write successfull? */
 512    if ((status & STATUS_PGM_ERR) || read32 (offset) != x)
 513          {
 514                 printk (KERN_WARNING "%s: write error at address 0x%.8x.\n",module_name,offset);
 515                 return (0);
 516          }
 517
 518    return (1);
 519 }
 520
 521 static int flash_write (struct mtd_info *mtd,loff_t to,size_t len,size_t *retlen,const u_char *buf)
 522 {
 523    __u8 tmp[4];
 524    int i,n;
 525
 526 #ifdef LART_DEBUG
 527    printk (KERN_DEBUG "%s(to = 0x%.8x, len = %d)\n", __func__, (__u32)to, len);
 528 #endif
 529
 530    *retlen = 0;
 531
 532    /* sanity checks */
 533    if (!len) return (0);
 534    if (to + len > mtd->size) return (-EINVAL);
 535
 536    /* first, we write a 0xFF.... padded byte until we reach a dword boundary */
 537    if (to & (BUSWIDTH - 1))
 538          {
 539                 __u32 aligned = to & ~(BUSWIDTH - 1);
 540                 int gap = to - aligned;
 541
 542                 i = n = 0;
 543
 544                 while (gap--) tmp[i++] = 0xFF;
 545                 while (len && i < BUSWIDTH) tmp[i++] = buf[n++], len--;
 546                 while (i < BUSWIDTH) tmp[i++] = 0xFF;
 547
 548                 if (!write_dword (aligned,*((__u32 *) tmp))) return (-EIO);
 549
 550                 to += n;
 551                 buf += n;
 552                 *retlen += n;
 553          }
 554
 555    /* now we write dwords until we reach a non-dword boundary */
 556    while (len >= BUSWIDTH)
 557          {
 558                 if (!write_dword (to,*((__u32 *) buf))) return (-EIO);
 559
 560                 to += BUSWIDTH;
 561                 buf += BUSWIDTH;
 562                 *retlen += BUSWIDTH;
 563                 len -= BUSWIDTH;
 564          }
 565
 566    /* top up the last unaligned bytes, padded with 0xFF.... */
 567    if (len & (BUSWIDTH - 1))
 568          {
 569                 i = n = 0;
 570
 571                 while (len--) tmp[i++] = buf[n++];
 572                 while (i < BUSWIDTH) tmp[i++] = 0xFF;
 573
 574                 if (!write_dword (to,*((__u32 *) tmp))) return (-EIO);
 575
 576                 *retlen += n;
 577          }
 578
 579    return (0);
 580 }
 581
 582 /***************************************************************************************************/
 583
 584 static struct mtd_info mtd;
 585
 586 static struct mtd_erase_region_info erase_regions[] = {
 587         /* parameter blocks */
 588         {
 589                 .offset         = 0x00000000,
 590                 .erasesize      = FLASH_BLOCKSIZE_PARAM,
 591                 .numblocks      = FLASH_NUMBLOCKS_16m_PARAM,
 592         },
 593         /* main blocks */
 594         {
 595                 .offset  = FLASH_BLOCKSIZE_PARAM * FLASH_NUMBLOCKS_16m_PARAM,
 596                 .erasesize      = FLASH_BLOCKSIZE_MAIN,
 597                 .numblocks      = FLASH_NUMBLOCKS_16m_MAIN,
 598         }
 599 };
 600
 601 #ifdef HAVE_PARTITIONS
 602 static struct mtd_partition lart_partitions[] = {
 603         /* blob */
 604         {
 605                 .name   = "blob",
 606                 .offset = BLOB_START,
 607                 .size   = BLOB_LEN,
 608         },
 609         /* kernel */
 610         {
 611                 .name   = "kernel",
 612                 .offset = KERNEL_START,         /* MTDPART_OFS_APPEND */
 613                 .size   = KERNEL_LEN,
 614         },
 615         /* initial ramdisk / file system */
 616         {
 617                 .name   = "file system",
 618                 .offset = INITRD_START,         /* MTDPART_OFS_APPEND */
 619                 .size   = INITRD_LEN,           /* MTDPART_SIZ_FULL */
 620         }
 621 };
 622 #endif
 623
 624 static int __init lart_flash_init (void)
 625 {
 626    int result;
 627    memset (&mtd,0,sizeof (mtd));
 628    printk ("MTD driver for LART. Written by Abraham vd Merwe <abraham@2d3d.co.za>\n");
 629    printk ("%s: Probing for 28F160x3 flash on LART...\n",module_name);
 630    if (!flash_probe ())
 631          {
 632                 printk (KERN_WARNING "%s: Found no LART compatible flash device\n",module_name);
 633                 return (-ENXIO);
 634          }
 635    printk ("%s: This looks like a LART board to me.\n",module_name);
 636    mtd.name = module_name;
 637    mtd.type = MTD_NORFLASH;
 638    mtd.writesize = 1;
 639    mtd.flags = MTD_CAP_NORFLASH;
 640    mtd.size = FLASH_BLOCKSIZE_PARAM * FLASH_NUMBLOCKS_16m_PARAM + FLASH_BLOCKSIZE_MAIN * FLASH_NUMBLOCKS_16m_MAIN;
 641    mtd.erasesize = FLASH_BLOCKSIZE_MAIN;
 642    mtd.numeraseregions = ARRAY_SIZE(erase_regions);
 643    mtd.eraseregions = erase_regions;
 644    mtd.erase = flash_erase;
 645    mtd.read = flash_read;
 646    mtd.write = flash_write;
 647    mtd.owner = THIS_MODULE;
 648
 649 #ifdef LART_DEBUG
 650    printk (KERN_DEBUG
 651                    "mtd.name = %s\n"
 652                    "mtd.size = 0x%.8x (%uM)\n"
 653                    "mtd.erasesize = 0x%.8x (%uK)\n"
 654                    "mtd.numeraseregions = %d\n",
 655                    mtd.name,
 656                    mtd.size,mtd.size / (1024*1024),
 657                    mtd.erasesize,mtd.erasesize / 1024,
 658                    mtd.numeraseregions);
 659
 660    if (mtd.numeraseregions)
 661          for (result = 0; result < mtd.numeraseregions; result++)
 662            printk (KERN_DEBUG
 663                            "\n\n"
 664                            "mtd.eraseregions[%d].offset = 0x%.8x\n"
 665                            "mtd.eraseregions[%d].erasesize = 0x%.8x (%uK)\n"
 666                            "mtd.eraseregions[%d].numblocks = %d\n",
 667                            result,mtd.eraseregions[result].offset,
 668                            result,mtd.eraseregions[result].erasesize,mtd.eraseregions[result].erasesize / 1024,
 669                            result,mtd.eraseregions[result].numblocks);
 670
 671 #ifdef HAVE_PARTITIONS
 672    printk ("\npartitions = %d\n", ARRAY_SIZE(lart_partitions));
 673
 674    for (result = 0; result < ARRAY_SIZE(lart_partitions); result++)
 675          printk (KERN_DEBUG
 676                          "\n\n"
 677                          "lart_partitions[%d].name = %s\n"
 678                          "lart_partitions[%d].offset = 0x%.8x\n"
 679                          "lart_partitions[%d].size = 0x%.8x (%uK)\n",
 680                          result,lart_partitions[result].name,
 681                          result,lart_partitions[result].offset,
 682                          result,lart_partitions[result].size,lart_partitions[result].size / 1024);
 683 #endif
 684 #endif
 685
 686 #ifndef HAVE_PARTITIONS
 687    result = add_mtd_device (&mtd);
 688 #else
 689    result = add_mtd_partitions (&mtd,lart_partitions, ARRAY_SIZE(lart_partitions));
 690 #endif
 691
 692    return (result);
 693 }
 694
 695 static void __exit lart_flash_exit (void)
 696 {
 697 #ifndef HAVE_PARTITIONS
 698    del_mtd_device (&mtd);
 699 #else
 700    del_mtd_partitions (&mtd);
 701 #endif
 702 }
 703
 704 module_init (lart_flash_init);
 705 module_exit (lart_flash_exit);
 706
 707 MODULE_LICENSE("GPL");
 708 MODULE_AUTHOR("Abraham vd Merwe <abraham@2d3d.co.za>");
 709 MODULE_DESCRIPTION("MTD driver for Intel 28F160F3 on LART board");