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   1 /***************************************************************************
   2  *   Copyright (C) 2005 by Dominic Rath                                    *
   3  *   Dominic.Rath@gmx.de                                                   *
   4  *                                                                         *
   5  *   LPC1700 support Copyright (C) 2009 by Audrius Urmanavicius            *
   6  *   didele.deze@gmail.com                                                 *
   7  *                                                                         *
   8  *   This program is free software; you can redistribute it and/or modify  *
   9  *   it under the terms of the GNU General Public License as published by  *
  10  *   the Free Software Foundation; either version 2 of the License, or     *
  11  *   (at your option) any later version.                                   *
  12  *                                                                         *
  13  *   This program is distributed in the hope that it will be useful,       *
  14  *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
  15  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
  16  *   GNU General Public License for more details.                          *
  17  *                                                                         *
  18  *   You should have received a copy of the GNU General Public License     *
  19  *   along with this program; if not, write to the                         *
  20  *   Free Software Foundation, Inc.,                                       *
  21  *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             *
  22  ***************************************************************************/
  23
  24 #ifdef HAVE_CONFIG_H
  25 #include "config.h"
  26 #endif
  27
  28 #include "imp.h"
  29 #include "lpc2000.h"
  30 #include <helper/binarybuffer.h>
  31 #include <target/algorithm.h>
  32 #include <target/arm_opcodes.h>
  33 #include <target/armv7m.h>
  34
  35
  36 /* flash programming support for NXP LPC17xx and LPC2xxx devices
  37  * currently supported devices:
  38  * variant 1 (lpc2000_v1):
  39  * - 2104 | 5 | 6
  40  * - 2114 | 9
  41  * - 2124 | 9
  42  * - 2194
  43  * - 2212 | 4
  44  * - 2292 | 4
  45  *
  46  * variant 2 (lpc2000_v2):
  47  * - 213x
  48  * - 214x
  49  * - 2101 | 2 | 3
  50  * - 2364 | 6 | 8
  51  * - 2378
  52  *
  53  * lpc1700:
  54  * - 175x
  55  * - 176x (tested with LPC1768)
  56  */
  57
  58 static int lpc2000_build_sector_list(struct flash_bank *bank)
  59 {
  60         struct lpc2000_flash_bank *lpc2000_info = bank->driver_priv;
  61         int i;
  62         uint32_t offset = 0;
  63
  64         /* default to a 4096 write buffer */
  65         lpc2000_info->cmd51_max_buffer = 4096;
  66
  67         if (lpc2000_info->variant == lpc2000_v1)
  68         {
  69                 /* variant 1 has different layout for 128kb and 256kb flashes */
  70                 if (bank->size == 128 * 1024)
  71                 {
  72                         bank->num_sectors = 16;
  73                         bank->sectors = malloc(sizeof(struct flash_sector) * 16);
  74                         for (i = 0; i < 16; i++)
  75                         {
  76                                 bank->sectors[i].offset = offset;
  77                                 bank->sectors[i].size = 8 * 1024;
  78                                 offset += bank->sectors[i].size;
  79                                 bank->sectors[i].is_erased = -1;
  80                                 bank->sectors[i].is_protected = 1;
  81                         }
  82                 }
  83                 else if (bank->size == 256 * 1024)
  84                 {
  85                         bank->num_sectors = 18;
  86                         bank->sectors = malloc(sizeof(struct flash_sector) * 18);
  87
  88                         for (i = 0; i < 8; i++)
  89                         {
  90                                 bank->sectors[i].offset = offset;
  91                                 bank->sectors[i].size = 8 * 1024;
  92                                 offset += bank->sectors[i].size;
  93                                 bank->sectors[i].is_erased = -1;
  94                                 bank->sectors[i].is_protected = 1;
  95                         }
  96                         for (i = 8; i < 10; i++)
  97                         {
  98                                 bank->sectors[i].offset = offset;
  99                                 bank->sectors[i].size = 64 * 1024;
 100                                 offset += bank->sectors[i].size;
 101                                 bank->sectors[i].is_erased = -1;
 102                                 bank->sectors[i].is_protected = 1;
 103                         }
 104                         for (i = 10; i < 18; i++)
 105                         {
 106                                 bank->sectors[i].offset = offset;
 107                                 bank->sectors[i].size = 8 * 1024;
 108                                 offset += bank->sectors[i].size;
 109                                 bank->sectors[i].is_erased = -1;
 110                                 bank->sectors[i].is_protected = 1;
 111                         }
 112                 }
 113                 else
 114                 {
 115                         LOG_ERROR("BUG: unknown bank->size encountered");
 116                         exit(-1);
 117                 }
 118         }
 119         else if (lpc2000_info->variant == lpc2000_v2)
 120         {
 121                 /* variant 2 has a uniform layout, only number of sectors differs */
 122                 switch (bank->size)
 123                 {
 124                         case 4 * 1024:
 125                                 lpc2000_info->cmd51_max_buffer = 1024;
 126                                 bank->num_sectors = 1;
 127                                 break;
 128                         case 8 * 1024:
 129                                 lpc2000_info->cmd51_max_buffer = 1024;
 130                                 bank->num_sectors = 2;
 131                                 break;
 132                         case 16 * 1024:
 133                                 bank->num_sectors = 4;
 134                                 break;
 135                         case 32 * 1024:
 136                                 bank->num_sectors = 8;
 137                                 break;
 138                         case 64 * 1024:
 139                                 bank->num_sectors = 9;
 140                                 break;
 141                         case 128 * 1024:
 142                                 bank->num_sectors = 11;
 143                                 break;
 144                         case 256 * 1024:
 145                                 bank->num_sectors = 15;
 146                                 break;
 147                         case 512 * 1024:
 148                         case 500 * 1024:
 149                                 bank->num_sectors = 27;
 150                                 break;
 151                         default:
 152                                 LOG_ERROR("BUG: unknown bank->size encountered");
 153                                 exit(-1);
 154                                 break;
 155                 }
 156
 157                 bank->sectors = malloc(sizeof(struct flash_sector) * bank->num_sectors);
 158
 159                 for (i = 0; i < bank->num_sectors; i++)
 160                 {
 161                         if ((i >= 0) && (i < 8))
 162                         {
 163                                 bank->sectors[i].offset = offset;
 164                                 bank->sectors[i].size = 4 * 1024;
 165                                 offset += bank->sectors[i].size;
 166                                 bank->sectors[i].is_erased = -1;
 167                                 bank->sectors[i].is_protected = 1;
 168                         }
 169                         if ((i >= 8) && (i < 22))
 170                         {
 171                                 bank->sectors[i].offset = offset;
 172                                 bank->sectors[i].size = 32 * 1024;
 173                                 offset += bank->sectors[i].size;
 174                                 bank->sectors[i].is_erased = -1;
 175                                 bank->sectors[i].is_protected = 1;
 176                         }
 177                         if ((i >= 22) && (i < 27))
 178                         {
 179                                 bank->sectors[i].offset = offset;
 180                                 bank->sectors[i].size = 4 * 1024;
 181                                 offset += bank->sectors[i].size;
 182                                 bank->sectors[i].is_erased = -1;
 183                                 bank->sectors[i].is_protected = 1;
 184                         }
 185                 }
 186         }
 187         else if (lpc2000_info->variant == lpc1700)
 188         {
 189                 switch(bank->size)
 190                 {
 191                         case 32 * 1024:
 192                                 bank->num_sectors = 8;
 193                                 break;
 194                         case 64 * 1024:
 195                                 bank->num_sectors = 16;
 196                                 break;
 197                         case 128 * 1024:
 198                                 bank->num_sectors = 18;
 199                                 break;
 200                         case 256 * 1024:
 201                                 bank->num_sectors = 22;
 202                                 break;
 203                         case 512 * 1024:
 204                                 bank->num_sectors = 30;
 205                                 break;
 206                         default:
 207                                 LOG_ERROR("BUG: unknown bank->size encountered");
 208                                 exit(-1);
 209                 }
 210
 211                 bank->sectors = malloc(sizeof(struct flash_sector) * bank->num_sectors);
 212
 213                 for(i = 0; i < bank->num_sectors; i++)
 214                 {
 215                         bank->sectors[i].offset = offset;
 216                         /* sectors 0-15 are 4kB-sized, 16 and above are 32kB-sized for LPC17xx devices */
 217                         bank->sectors[i].size = (i < 16)? 4 * 1024 : 32 * 1024;
 218                         offset += bank->sectors[i].size;
 219                         bank->sectors[i].is_erased = -1;
 220                         bank->sectors[i].is_protected = 1;
 221                 }
 222         }
 223         else
 224         {
 225                 LOG_ERROR("BUG: unknown lpc2000_info->variant encountered");
 226                 exit(-1);
 227         }
 228
 229         return ERROR_OK;
 230 }
 231
 232 /* call LPC1700/LPC2000 IAP function
 233  * uses 180 bytes working area
 234  * 0x0 to 0x7: jump gate (BX to thumb state, b -2 to wait)
 235  * 0x8 to 0x1f: command parameter table (1+5 words)
 236  * 0x20 to 0x33: command result table (1+4 words)
 237  * 0x34 to 0xb3: stack (only 128b needed)
 238  */
 239 static int lpc2000_iap_call(struct flash_bank *bank, int code, uint32_t param_table[5], uint32_t result_table[4])
 240 {
 241         int retval;
 242         struct lpc2000_flash_bank *lpc2000_info = bank->driver_priv;
 243         struct target *target = bank->target;
 244         struct mem_param mem_params[2];
 245         struct reg_param reg_params[5];
 246         struct arm_algorithm armv4_5_info; /* for LPC2000 */
 247         struct armv7m_algorithm armv7m_info;   /* for LPC1700 */
 248         uint32_t status_code;
 249         uint32_t iap_entry_point = 0; /* to make compiler happier */
 250
 251         /* regrab previously allocated working_area, or allocate a new one */
 252         if (!lpc2000_info->iap_working_area)
 253         {
 254                 uint8_t jump_gate[8];
 255
 256                 /* make sure we have a working area */
 257                 if (target_alloc_working_area(target, 180, &lpc2000_info->iap_working_area) != ERROR_OK)
 258                 {
 259                         LOG_ERROR("no working area specified, can't write LPC2000 internal flash");
 260                         return ERROR_FLASH_OPERATION_FAILED;
 261                 }
 262
 263                 /* write IAP code to working area */
 264                 switch(lpc2000_info->variant)
 265                 {
 266                         case lpc1700:
 267                                 target_buffer_set_u32(target, jump_gate,
 268                                                 ARMV4_5_T_BX(12));
 269                                 target_buffer_set_u32(target, jump_gate + 4,
 270                                                 ARMV4_5_T_B(0xfffffe));
 271                                 break;
 272                         case lpc2000_v1:
 273                         case lpc2000_v2:
 274                                 target_buffer_set_u32(target, jump_gate, ARMV4_5_BX(12));
 275                                 target_buffer_set_u32(target, jump_gate + 4, ARMV4_5_B(0xfffffe, 0));
 276                                 break;
 277                         default:
 278                                 LOG_ERROR("BUG: unknown bank->size encountered");
 279                                 exit(-1);
 280                 }
 281
 282                 if ((retval = target_write_memory(target, lpc2000_info->iap_working_area->address, 4, 2, jump_gate)) != ERROR_OK)
 283                 {
 284                         LOG_ERROR("Write memory at address 0x%8.8" PRIx32 " failed (check work_area definition)", lpc2000_info->iap_working_area->address);
 285                         return retval;
 286                 }
 287         }
 288
 289         switch(lpc2000_info->variant)
 290         {
 291                 case lpc1700:
 292                         armv7m_info.common_magic = ARMV7M_COMMON_MAGIC;
 293                         armv7m_info.core_mode = ARMV7M_MODE_ANY;
 294                         iap_entry_point = 0x1fff1ff1;
 295                         break;
 296                 case lpc2000_v1:
 297                 case lpc2000_v2:
 298                         armv4_5_info.common_magic = ARM_COMMON_MAGIC;
 299                         armv4_5_info.core_mode = ARM_MODE_SVC;
 300                         armv4_5_info.core_state = ARM_STATE_ARM;
 301                         iap_entry_point = 0x7ffffff1;
 302                         break;
 303                 default:
 304                         LOG_ERROR("BUG: unknown lpc2000->variant encountered");
 305                         exit(-1);
 306         }
 307
 308         /* command parameter table */
 309         init_mem_param(&mem_params[0], lpc2000_info->iap_working_area->address + 8, 6 * 4, PARAM_OUT);
 310         target_buffer_set_u32(target, mem_params[0].value, code);
 311         target_buffer_set_u32(target, mem_params[0].value + 0x04, param_table[0]);
 312         target_buffer_set_u32(target, mem_params[0].value + 0x08, param_table[1]);
 313         target_buffer_set_u32(target, mem_params[0].value + 0x0c, param_table[2]);
 314         target_buffer_set_u32(target, mem_params[0].value + 0x10, param_table[3]);
 315         target_buffer_set_u32(target, mem_params[0].value + 0x14, param_table[4]);
 316
 317         init_reg_param(&reg_params[0], "r0", 32, PARAM_OUT);
 318         buf_set_u32(reg_params[0].value, 0, 32, lpc2000_info->iap_working_area->address + 0x08);
 319
 320         /* command result table */
 321         init_mem_param(&mem_params[1], lpc2000_info->iap_working_area->address + 0x20, 5 * 4, PARAM_IN);
 322
 323         init_reg_param(&reg_params[1], "r1", 32, PARAM_OUT);
 324         buf_set_u32(reg_params[1].value, 0, 32, lpc2000_info->iap_working_area->address + 0x20);
 325
 326         /* IAP entry point */
 327         init_reg_param(&reg_params[2], "r12", 32, PARAM_OUT);
 328         buf_set_u32(reg_params[2].value, 0, 32, iap_entry_point);
 329
 330         switch(lpc2000_info->variant)
 331         {
 332                 case lpc1700:
 333                         /* IAP stack */
 334                         init_reg_param(&reg_params[3], "sp", 32, PARAM_OUT);
 335                         buf_set_u32(reg_params[3].value, 0, 32, lpc2000_info->iap_working_area->address + 0xb4);
 336
 337                         /* return address */
 338                         init_reg_param(&reg_params[4], "lr", 32, PARAM_OUT);
 339                         buf_set_u32(reg_params[4].value, 0, 32, (lpc2000_info->iap_working_area->address + 0x04) | 1); /* bit0 of LR = 1 to return in Thumb mode */
 340
 341                         target_run_algorithm(target, 2, mem_params, 5, reg_params, lpc2000_info->iap_working_area->address, lpc2000_info->iap_working_area->address + 0x4, 10000, &armv7m_info);
 342                         break;
 343                 case lpc2000_v1:
 344                 case lpc2000_v2:
 345                         /* IAP stack */
 346                         init_reg_param(&reg_params[3], "sp_svc", 32, PARAM_OUT);
 347                         buf_set_u32(reg_params[3].value, 0, 32, lpc2000_info->iap_working_area->address + 0xb4);
 348
 349                         /* return address */
 350                         init_reg_param(&reg_params[4], "lr_svc", 32, PARAM_OUT);
 351                         buf_set_u32(reg_params[4].value, 0, 32, lpc2000_info->iap_working_area->address + 0x04);
 352
 353                         target_run_algorithm(target, 2, mem_params, 5, reg_params, lpc2000_info->iap_working_area->address, lpc2000_info->iap_working_area->address + 0x4, 10000, &armv4_5_info);
 354                         break;
 355                 default:
 356                         LOG_ERROR("BUG: unknown lpc2000->variant encountered");
 357                         exit(-1);
 358         }
 359
 360
 361         status_code     = target_buffer_get_u32(target, mem_params[1].value);
 362         result_table[0] = target_buffer_get_u32(target, mem_params[1].value + 0x04);
 363         result_table[1] = target_buffer_get_u32(target, mem_params[1].value + 0x08);
 364         result_table[2] = target_buffer_get_u32(target, mem_params[1].value + 0x0c);
 365         result_table[3] = target_buffer_get_u32(target, mem_params[1].value + 0x10);
 366
 367         LOG_DEBUG("IAP command = %i (0x%8.8" PRIx32", 0x%8.8" PRIx32", 0x%8.8" PRIx32", 0x%8.8" PRIx32", 0x%8.8" PRIx32") completed with result = %8.8" PRIx32,
 368                           code, param_table[0], param_table[1], param_table[2], param_table[3], param_table[4], status_code);
 369
 370         destroy_mem_param(&mem_params[0]);
 371         destroy_mem_param(&mem_params[1]);
 372
 373         destroy_reg_param(&reg_params[0]);
 374         destroy_reg_param(&reg_params[1]);
 375         destroy_reg_param(&reg_params[2]);
 376         destroy_reg_param(&reg_params[3]);
 377         destroy_reg_param(&reg_params[4]);
 378
 379         return status_code;
 380 }
 381
 382 static int lpc2000_iap_blank_check(struct flash_bank *bank, int first, int last)
 383 {
 384         uint32_t param_table[5];
 385         uint32_t result_table[4];
 386         int status_code;
 387         int i;
 388
 389         if ((first < 0) || (last >= bank->num_sectors))
 390                 return ERROR_FLASH_SECTOR_INVALID;
 391
 392         for (i = first; i <= last; i++)
 393         {
 394                 /* check single sector */
 395                 param_table[0] = param_table[1] = i;
 396                 status_code = lpc2000_iap_call(bank, 53, param_table, result_table);
 397
 398                 switch (status_code)
 399                 {
 400                         case ERROR_FLASH_OPERATION_FAILED:
 401                                 return ERROR_FLASH_OPERATION_FAILED;
 402                         case LPC2000_CMD_SUCCESS:
 403                                 bank->sectors[i].is_erased = 1;
 404                                 break;
 405                         case LPC2000_SECTOR_NOT_BLANK:
 406                                 bank->sectors[i].is_erased = 0;
 407                                 break;
 408                         case LPC2000_INVALID_SECTOR:
 409                                 bank->sectors[i].is_erased = 0;
 410                                 break;
 411                         case LPC2000_BUSY:
 412                                 return ERROR_FLASH_BUSY;
 413                                 break;
 414                         default:
 415                                 LOG_ERROR("BUG: unknown LPC2000 status code %i", status_code);
 416                                 exit(-1);
 417                 }
 418         }
 419
 420         return ERROR_OK;
 421 }
 422
 423 /*
 424  * flash bank lpc2000 <base> <size> 0 0 <target#> <lpc_variant> <cclk> [calc_checksum]
 425  */
 426 FLASH_BANK_COMMAND_HANDLER(lpc2000_flash_bank_command)
 427 {
 428         struct lpc2000_flash_bank *lpc2000_info;
 429
 430         if (CMD_ARGC < 8)
 431         {
 432                 LOG_WARNING("incomplete flash_bank lpc2000 configuration");
 433                 return ERROR_FLASH_BANK_INVALID;
 434         }
 435
 436         lpc2000_info = malloc(sizeof(struct lpc2000_flash_bank));
 437         bank->driver_priv = lpc2000_info;
 438
 439         if (strcmp(CMD_ARGV[6], "lpc2000_v1") == 0)
 440         {
 441                 lpc2000_info->variant = lpc2000_v1;
 442                 lpc2000_info->cmd51_dst_boundary = 512;
 443                 lpc2000_info->cmd51_can_256b = 0;
 444                 lpc2000_info->cmd51_can_8192b = 1;
 445                 lpc2000_info->checksum_vector = 5;
 446         }
 447         else if (strcmp(CMD_ARGV[6], "lpc2000_v2") == 0)
 448         {
 449                 lpc2000_info->variant = lpc2000_v2;
 450                 lpc2000_info->cmd51_dst_boundary = 256;
 451                 lpc2000_info->cmd51_can_256b = 1;
 452                 lpc2000_info->cmd51_can_8192b = 0;
 453                 lpc2000_info->checksum_vector = 5;
 454         }
 455         else if (strcmp(CMD_ARGV[6], "lpc1700") == 0)
 456         {
 457                 lpc2000_info->variant = lpc1700;
 458                 lpc2000_info->cmd51_dst_boundary = 256;
 459                 lpc2000_info->cmd51_can_256b = 1;
 460                 lpc2000_info->cmd51_can_8192b = 0;
 461                 lpc2000_info->checksum_vector = 7;
 462         }
 463         else
 464         {
 465                 LOG_ERROR("unknown LPC2000 variant: %s", CMD_ARGV[6]);
 466                 free(lpc2000_info);
 467                 return ERROR_FLASH_BANK_INVALID;
 468         }
 469
 470         lpc2000_info->iap_working_area = NULL;
 471         COMMAND_PARSE_NUMBER(u32, CMD_ARGV[7], lpc2000_info->cclk);
 472         lpc2000_info->calc_checksum = 0;
 473         lpc2000_build_sector_list(bank);
 474
 475         if (CMD_ARGC >= 9)
 476         {
 477                 if (strcmp(CMD_ARGV[8], "calc_checksum") == 0)
 478                         lpc2000_info->calc_checksum = 1;
 479         }
 480
 481         return ERROR_OK;
 482 }
 483
 484 static int lpc2000_erase(struct flash_bank *bank, int first, int last)
 485 {
 486         struct lpc2000_flash_bank *lpc2000_info = bank->driver_priv;
 487         uint32_t param_table[5];
 488         uint32_t result_table[4];
 489         int status_code;
 490
 491         if (bank->target->state != TARGET_HALTED)
 492         {
 493                 LOG_ERROR("Target not halted");
 494                 return ERROR_TARGET_NOT_HALTED;
 495         }
 496
 497         param_table[0] = first;
 498         param_table[1] = last;
 499         param_table[2] = lpc2000_info->cclk;
 500
 501         /* Prepare sectors */
 502         status_code = lpc2000_iap_call(bank, 50, param_table, result_table);
 503         switch (status_code)
 504         {
 505                 case ERROR_FLASH_OPERATION_FAILED:
 506                         return ERROR_FLASH_OPERATION_FAILED;
 507                 case LPC2000_CMD_SUCCESS:
 508                         break;
 509                 case LPC2000_INVALID_SECTOR:
 510                         return ERROR_FLASH_SECTOR_INVALID;
 511                         break;
 512                 default:
 513                         LOG_WARNING("lpc2000 prepare sectors returned %i", status_code);
 514                         return ERROR_FLASH_OPERATION_FAILED;
 515         }
 516
 517         /* Erase sectors */
 518         status_code = lpc2000_iap_call(bank, 52, param_table, result_table);
 519         switch (status_code)
 520         {
 521                 case ERROR_FLASH_OPERATION_FAILED:
 522                         return ERROR_FLASH_OPERATION_FAILED;
 523                 case LPC2000_CMD_SUCCESS:
 524                         break;
 525                 case LPC2000_INVALID_SECTOR:
 526                         return ERROR_FLASH_SECTOR_INVALID;
 527                         break;
 528                 default:
 529                         LOG_WARNING("lpc2000 erase sectors returned %i", status_code);
 530                         return ERROR_FLASH_OPERATION_FAILED;
 531         }
 532
 533         return ERROR_OK;
 534 }
 535
 536 static int lpc2000_protect(struct flash_bank *bank, int set, int first, int last)
 537 {
 538         /* can't protect/unprotect on the lpc2000 */
 539         return ERROR_OK;
 540 }
 541
 542 static int lpc2000_write(struct flash_bank *bank, uint8_t *buffer, uint32_t offset, uint32_t count)
 543 {
 544         struct lpc2000_flash_bank *lpc2000_info = bank->driver_priv;
 545         struct target *target = bank->target;
 546         uint32_t dst_min_alignment;
 547         uint32_t bytes_remaining = count;
 548         uint32_t bytes_written = 0;
 549         int first_sector = 0;
 550         int last_sector = 0;
 551         uint32_t param_table[5];
 552         uint32_t result_table[4];
 553         int status_code;
 554         int i;
 555         struct working_area *download_area;
 556         int retval = ERROR_OK;
 557
 558         if (bank->target->state != TARGET_HALTED)
 559         {
 560                 LOG_ERROR("Target not halted");
 561                 return ERROR_TARGET_NOT_HALTED;
 562         }
 563
 564         if (offset + count > bank->size)
 565                 return ERROR_FLASH_DST_OUT_OF_BANK;
 566
 567         dst_min_alignment = lpc2000_info->cmd51_dst_boundary;
 568
 569         if (offset % dst_min_alignment)
 570         {
 571                 LOG_WARNING("offset 0x%" PRIx32 " breaks required alignment 0x%" PRIx32, offset, dst_min_alignment);
 572                 return ERROR_FLASH_DST_BREAKS_ALIGNMENT;
 573         }
 574
 575         for (i = 0; i < bank->num_sectors; i++)
 576         {
 577                 if (offset >= bank->sectors[i].offset)
 578                         first_sector = i;
 579                 if (offset + DIV_ROUND_UP(count, dst_min_alignment) * dst_min_alignment > bank->sectors[i].offset)
 580                         last_sector = i;
 581         }
 582
 583         LOG_DEBUG("first_sector: %i, last_sector: %i", first_sector, last_sector);
 584
 585         /* check if exception vectors should be flashed */
 586         if ((offset == 0) && (count >= 0x20) && lpc2000_info->calc_checksum)
 587         {
 588                 uint32_t checksum = 0;
 589                 int i;
 590                 for (i = 0; i < 8; i++)
 591                 {
 592                         LOG_DEBUG("Vector 0x%2.2x: 0x%8.8" PRIx32, i * 4, buf_get_u32(buffer + (i * 4), 0, 32));
 593                         if (i != lpc2000_info->checksum_vector)
 594                                 checksum += buf_get_u32(buffer + (i * 4), 0, 32);
 595                 }
 596                 checksum = 0 - checksum;
 597                 LOG_DEBUG("checksum: 0x%8.8" PRIx32, checksum);
 598
 599                 uint32_t original_value = buf_get_u32(buffer + (lpc2000_info->checksum_vector * 4), 0, 32);
 600                 if (original_value != checksum)
 601                 {
 602                         LOG_WARNING("Verification will fail since checksum in image (0x%8.8" PRIx32 ") to be written to flash is different from calculated vector checksum (0x%8.8" PRIx32 ").",
 603                                         original_value, checksum);
 604                         LOG_WARNING("To remove this warning modify build tools on developer PC to inject correct LPC vector checksum.");
 605                 }
 606
 607                 buf_set_u32(buffer + (lpc2000_info->checksum_vector * 4), 0, 32, checksum);
 608         }
 609
 610         /* allocate a working area */
 611         if (target_alloc_working_area(target, lpc2000_info->cmd51_max_buffer, &download_area) != ERROR_OK)
 612         {
 613                 LOG_ERROR("no working area specified, can't write LPC2000 internal flash");
 614                 return ERROR_FLASH_OPERATION_FAILED;
 615         }
 616
 617         while (bytes_remaining > 0)
 618         {
 619                 uint32_t thisrun_bytes;
 620                 if (bytes_remaining >= lpc2000_info->cmd51_max_buffer)
 621                         thisrun_bytes = lpc2000_info->cmd51_max_buffer;
 622                 else if (bytes_remaining >= 1024)
 623                         thisrun_bytes = 1024;
 624                 else if ((bytes_remaining >= 512) || (!lpc2000_info->cmd51_can_256b))
 625                         thisrun_bytes = 512;
 626                 else
 627                         thisrun_bytes = 256;
 628
 629                 /* Prepare sectors */
 630                 param_table[0] = first_sector;
 631                 param_table[1] = last_sector;
 632                 status_code = lpc2000_iap_call(bank, 50, param_table, result_table);
 633                 switch (status_code)
 634                 {
 635                         case ERROR_FLASH_OPERATION_FAILED:
 636                                 retval = ERROR_FLASH_OPERATION_FAILED;
 637                                 break;
 638                         case LPC2000_CMD_SUCCESS:
 639                                 break;
 640                         case LPC2000_INVALID_SECTOR:
 641                                 retval = ERROR_FLASH_SECTOR_INVALID;
 642                                 break;
 643                         default:
 644                                 LOG_WARNING("lpc2000 prepare sectors returned %i", status_code);
 645                                 retval = ERROR_FLASH_OPERATION_FAILED;
 646                                 break;
 647                 }
 648
 649                 /* Exit if error occured */
 650                 if (retval != ERROR_OK)
 651                         break;
 652
 653                 if (bytes_remaining >= thisrun_bytes)
 654                 {
 655                         if ((retval = target_write_buffer(bank->target, download_area->address, thisrun_bytes, buffer + bytes_written)) != ERROR_OK)
 656                         {
 657                                 retval = ERROR_FLASH_OPERATION_FAILED;
 658                                 break;
 659                         }
 660                 }
 661                 else
 662                 {
 663                         uint8_t *last_buffer = malloc(thisrun_bytes);
 664                         memcpy(last_buffer, buffer + bytes_written, bytes_remaining);
 665                         memset(last_buffer + bytes_remaining, 0xff, thisrun_bytes - bytes_remaining);
 666                         target_write_buffer(bank->target, download_area->address, thisrun_bytes, last_buffer);
 667                         free(last_buffer);
 668                 }
 669
 670                 LOG_DEBUG("writing 0x%" PRIx32 " bytes to address 0x%" PRIx32 , thisrun_bytes, bank->base + offset + bytes_written);
 671
 672                 /* Write data */
 673                 param_table[0] = bank->base + offset + bytes_written;
 674                 param_table[1] = download_area->address;
 675                 param_table[2] = thisrun_bytes;
 676                 param_table[3] = lpc2000_info->cclk;
 677                 status_code = lpc2000_iap_call(bank, 51, param_table, result_table);
 678                 switch (status_code)
 679                 {
 680                         case ERROR_FLASH_OPERATION_FAILED:
 681                                 retval = ERROR_FLASH_OPERATION_FAILED;
 682                                 break;
 683                         case LPC2000_CMD_SUCCESS:
 684                                 break;
 685                         case LPC2000_INVALID_SECTOR:
 686                                 retval = ERROR_FLASH_SECTOR_INVALID;
 687                                 break;
 688                         default:
 689                                 LOG_WARNING("lpc2000 returned %i", status_code);
 690                                 retval = ERROR_FLASH_OPERATION_FAILED;
 691                                 break;
 692                 }
 693
 694                 /* Exit if error occured */
 695                 if (retval != ERROR_OK)
 696                         break;
 697
 698                 if (bytes_remaining > thisrun_bytes)
 699                         bytes_remaining -= thisrun_bytes;
 700                 else
 701                         bytes_remaining = 0;
 702                 bytes_written += thisrun_bytes;
 703         }
 704
 705         target_free_working_area(target, download_area);
 706
 707         return retval;
 708 }
 709
 710 static int lpc2000_probe(struct flash_bank *bank)
 711 {
 712         /* we can't probe on an lpc2000
 713          * if this is an lpc2xxx, it has the configured flash
 714          */
 715         return ERROR_OK;
 716 }
 717
 718 static int lpc2000_erase_check(struct flash_bank *bank)
 719 {
 720         if (bank->target->state != TARGET_HALTED)
 721         {
 722                 LOG_ERROR("Target not halted");
 723                 return ERROR_TARGET_NOT_HALTED;
 724         }
 725
 726         return lpc2000_iap_blank_check(bank, 0, bank->num_sectors - 1);
 727 }
 728
 729 static int lpc2000_protect_check(struct flash_bank *bank)
 730 {
 731         /* sectors are always protected */
 732         return ERROR_OK;
 733 }
 734
 735 static int lpc2000_info(struct flash_bank *bank, char *buf, int buf_size)
 736 {
 737         struct lpc2000_flash_bank *lpc2000_info = bank->driver_priv;
 738
 739         snprintf(buf, buf_size, "lpc2000 flash driver variant: %i, clk: %" PRIi32 "kHz" , lpc2000_info->variant, lpc2000_info->cclk);
 740
 741         return ERROR_OK;
 742 }
 743
 744 COMMAND_HANDLER(lpc2000_handle_part_id_command)
 745 {
 746         uint32_t param_table[5];
 747         uint32_t result_table[4];
 748         int status_code;
 749
 750         if (CMD_ARGC < 1)
 751         {
 752                 return ERROR_COMMAND_SYNTAX_ERROR;
 753         }
 754
 755         struct flash_bank *bank;
 756         int retval = CALL_COMMAND_HANDLER(flash_command_get_bank, 0, &bank);
 757         if (ERROR_OK != retval)
 758                 return retval;
 759
 760         if (bank->target->state != TARGET_HALTED)
 761         {
 762                 LOG_ERROR("Target not halted");
 763                 return ERROR_TARGET_NOT_HALTED;
 764         }
 765
 766         if ((status_code = lpc2000_iap_call(bank, 54, param_table, result_table)) != 0x0)
 767         {
 768                 if (status_code == ERROR_FLASH_OPERATION_FAILED)
 769                 {
 770                         command_print(CMD_CTX, "no sufficient working area specified, can't access LPC2000 IAP interface");
 771                         return ERROR_OK;
 772                 }
 773                 command_print(CMD_CTX, "lpc2000 IAP returned status code %i", status_code);
 774         }
 775         else
 776         {
 777                 command_print(CMD_CTX, "lpc2000 part id: 0x%8.8" PRIx32 , result_table[0]);
 778         }
 779
 780         return ERROR_OK;
 781 }
 782
 783 static const struct command_registration lpc2000_exec_command_handlers[] = {
 784         {
 785                 .name = "part_id",
 786                 .handler = lpc2000_handle_part_id_command,
 787                 .mode = COMMAND_EXEC,
 788                 .help = "print part id of lpc2000 flash bank <num>",
 789         },
 790         COMMAND_REGISTRATION_DONE
 791 };
 792 static const struct command_registration lpc2000_command_handlers[] = {
 793         {
 794                 .name = "lpc2000",
 795                 .mode = COMMAND_ANY,
 796                 .help = "lpc2000 flash command group",
 797                 .chain = lpc2000_exec_command_handlers,
 798         },
 799         COMMAND_REGISTRATION_DONE
 800 };
 801
 802 struct flash_driver lpc2000_flash = {
 803         .name = "lpc2000",
 804         .commands = lpc2000_command_handlers,
 805         .flash_bank_command = lpc2000_flash_bank_command,
 806         .erase = lpc2000_erase,
 807         .protect = lpc2000_protect,
 808         .write = lpc2000_write,
 809         .probe = lpc2000_probe,
 810         .auto_probe = lpc2000_probe,
 811         .erase_check = lpc2000_erase_check,
 812         .protect_check = lpc2000_protect_check,
 813         .info = lpc2000_info,
 814 };