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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 /**
  37  * @file
  38  * flash programming support for NXP LPC17xx and LPC2xxx devices.
  39  *
  40  * @todo Provide a way to update CCLK after declaring the flash bank.
  41  * The value which is correct after chip reset will rarely still work
  42  * right after the clocks switch to use the PLL (e.g. 4MHz --> 100 MHz).
  43  */
  44 /*
  45  * currently supported devices:
  46  * variant 1 (lpc2000_v1):
  47  * - 2104 | 5 | 6
  48  * - 2114 | 9
  49  * - 2124 | 9
  50  * - 2194
  51  * - 2212 | 4
  52  * - 2292 | 4
  53  *
  54  * variant 2 (lpc2000_v2):
  55  * - 213x
  56  * - 214x
  57  * - 2101 | 2 | 3
  58  * - 2364 | 6 | 8
  59  * - 2378
  60  *
  61  * lpc1700:
  62  * - 175x
  63  * - 176x (tested with LPC1768)
  64  */
  65
  66 static int lpc2000_build_sector_list(struct flash_bank *bank)
  67 {
  68         struct lpc2000_flash_bank *lpc2000_info = bank->driver_priv;
  69         int i;
  70         uint32_t offset = 0;
  71
  72         /* default to a 4096 write buffer */
  73         lpc2000_info->cmd51_max_buffer = 4096;
  74
  75         if (lpc2000_info->variant == lpc2000_v1)
  76         {
  77                 /* variant 1 has different layout for 128kb and 256kb flashes */
  78                 if (bank->size == 128 * 1024)
  79                 {
  80                         bank->num_sectors = 16;
  81                         bank->sectors = malloc(sizeof(struct flash_sector) * 16);
  82                         for (i = 0; i < 16; i++)
  83                         {
  84                                 bank->sectors[i].offset = offset;
  85                                 bank->sectors[i].size = 8 * 1024;
  86                                 offset += bank->sectors[i].size;
  87                                 bank->sectors[i].is_erased = -1;
  88                                 bank->sectors[i].is_protected = 1;
  89                         }
  90                 }
  91                 else if (bank->size == 256 * 1024)
  92                 {
  93                         bank->num_sectors = 18;
  94                         bank->sectors = malloc(sizeof(struct flash_sector) * 18);
  95
  96                         for (i = 0; i < 8; i++)
  97                         {
  98                                 bank->sectors[i].offset = offset;
  99                                 bank->sectors[i].size = 8 * 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 = 8; i < 10; i++)
 105                         {
 106                                 bank->sectors[i].offset = offset;
 107                                 bank->sectors[i].size = 64 * 1024;
 108                                 offset += bank->sectors[i].size;
 109                                 bank->sectors[i].is_erased = -1;
 110                                 bank->sectors[i].is_protected = 1;
 111                         }
 112                         for (i = 10; i < 18; i++)
 113                         {
 114                                 bank->sectors[i].offset = offset;
 115                                 bank->sectors[i].size = 8 * 1024;
 116                                 offset += bank->sectors[i].size;
 117                                 bank->sectors[i].is_erased = -1;
 118                                 bank->sectors[i].is_protected = 1;
 119                         }
 120                 }
 121                 else
 122                 {
 123                         LOG_ERROR("BUG: unknown bank->size encountered");
 124                         exit(-1);
 125                 }
 126         }
 127         else if (lpc2000_info->variant == lpc2000_v2)
 128         {
 129                 /* variant 2 has a uniform layout, only number of sectors differs */
 130                 switch (bank->size)
 131                 {
 132                         case 4 * 1024:
 133                                 lpc2000_info->cmd51_max_buffer = 1024;
 134                                 bank->num_sectors = 1;
 135                                 break;
 136                         case 8 * 1024:
 137                                 lpc2000_info->cmd51_max_buffer = 1024;
 138                                 bank->num_sectors = 2;
 139                                 break;
 140                         case 16 * 1024:
 141                                 bank->num_sectors = 4;
 142                                 break;
 143                         case 32 * 1024:
 144                                 bank->num_sectors = 8;
 145                                 break;
 146                         case 64 * 1024:
 147                                 bank->num_sectors = 9;
 148                                 break;
 149                         case 128 * 1024:
 150                                 bank->num_sectors = 11;
 151                                 break;
 152                         case 256 * 1024:
 153                                 bank->num_sectors = 15;
 154                                 break;
 155                         case 512 * 1024:
 156                         case 500 * 1024:
 157                                 bank->num_sectors = 27;
 158                                 break;
 159                         default:
 160                                 LOG_ERROR("BUG: unknown bank->size encountered");
 161                                 exit(-1);
 162                                 break;
 163                 }
 164
 165                 bank->sectors = malloc(sizeof(struct flash_sector) * bank->num_sectors);
 166
 167                 for (i = 0; i < bank->num_sectors; i++)
 168                 {
 169                         if ((i >= 0) && (i < 8))
 170                         {
 171                                 bank->sectors[i].offset = offset;
 172                                 bank->sectors[i].size = 4 * 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 >= 8) && (i < 22))
 178                         {
 179                                 bank->sectors[i].offset = offset;
 180                                 bank->sectors[i].size = 32 * 1024;
 181                                 offset += bank->sectors[i].size;
 182                                 bank->sectors[i].is_erased = -1;
 183                                 bank->sectors[i].is_protected = 1;
 184                         }
 185                         if ((i >= 22) && (i < 27))
 186                         {
 187                                 bank->sectors[i].offset = offset;
 188                                 bank->sectors[i].size = 4 * 1024;
 189                                 offset += bank->sectors[i].size;
 190                                 bank->sectors[i].is_erased = -1;
 191                                 bank->sectors[i].is_protected = 1;
 192                         }
 193                 }
 194         }
 195         else if (lpc2000_info->variant == lpc1700)
 196         {
 197                 switch(bank->size)
 198                 {
 199                         case 32 * 1024:
 200                                 bank->num_sectors = 8;
 201                                 break;
 202                         case 64 * 1024:
 203                                 bank->num_sectors = 16;
 204                                 break;
 205                         case 128 * 1024:
 206                                 bank->num_sectors = 18;
 207                                 break;
 208                         case 256 * 1024:
 209                                 bank->num_sectors = 22;
 210                                 break;
 211                         case 512 * 1024:
 212                                 bank->num_sectors = 30;
 213                                 break;
 214                         default:
 215                                 LOG_ERROR("BUG: unknown bank->size encountered");
 216                                 exit(-1);
 217                 }
 218
 219                 bank->sectors = malloc(sizeof(struct flash_sector) * bank->num_sectors);
 220
 221                 for(i = 0; i < bank->num_sectors; i++)
 222                 {
 223                         bank->sectors[i].offset = offset;
 224                         /* sectors 0-15 are 4kB-sized, 16 and above are 32kB-sized for LPC17xx devices */
 225                         bank->sectors[i].size = (i < 16)? 4 * 1024 : 32 * 1024;
 226                         offset += bank->sectors[i].size;
 227                         bank->sectors[i].is_erased = -1;
 228                         bank->sectors[i].is_protected = 1;
 229                 }
 230         }
 231         else
 232         {
 233                 LOG_ERROR("BUG: unknown lpc2000_info->variant encountered");
 234                 exit(-1);
 235         }
 236
 237         return ERROR_OK;
 238 }
 239
 240 /* call LPC1700/LPC2000 IAP function
 241  * uses 180 bytes working area
 242  * 0x0 to 0x7: jump gate (BX to thumb state, b -2 to wait)
 243  * 0x8 to 0x1f: command parameter table (1+5 words)
 244  * 0x20 to 0x33: command result table (1+4 words)
 245  * 0x34 to 0xb3: stack (only 128b needed)
 246  */
 247 static int lpc2000_iap_call(struct flash_bank *bank, int code, uint32_t param_table[5], uint32_t result_table[4])
 248 {
 249         int retval;
 250         struct lpc2000_flash_bank *lpc2000_info = bank->driver_priv;
 251         struct target *target = bank->target;
 252         struct mem_param mem_params[2];
 253         struct reg_param reg_params[5];
 254         struct arm_algorithm armv4_5_info; /* for LPC2000 */
 255         struct armv7m_algorithm armv7m_info;   /* for LPC1700 */
 256         uint32_t status_code;
 257         uint32_t iap_entry_point = 0; /* to make compiler happier */
 258
 259         /* regrab previously allocated working_area, or allocate a new one */
 260         if (!lpc2000_info->iap_working_area)
 261         {
 262                 uint8_t jump_gate[8];
 263
 264                 /* make sure we have a working area */
 265                 if (target_alloc_working_area(target, 180, &lpc2000_info->iap_working_area) != ERROR_OK)
 266                 {
 267                         LOG_ERROR("no working area specified, can't write LPC2000 internal flash");
 268                         return ERROR_FLASH_OPERATION_FAILED;
 269                 }
 270
 271                 /* write IAP code to working area */
 272                 switch(lpc2000_info->variant)
 273                 {
 274                         case lpc1700:
 275                                 target_buffer_set_u32(target, jump_gate,
 276                                                 ARMV4_5_T_BX(12));
 277                                 target_buffer_set_u32(target, jump_gate + 4,
 278                                                 ARMV5_T_BKPT(0));
 279                                 break;
 280                         case lpc2000_v1:
 281                         case lpc2000_v2:
 282                                 target_buffer_set_u32(target, jump_gate, ARMV4_5_BX(12));
 283                                 target_buffer_set_u32(target, jump_gate + 4, ARMV4_5_B(0xfffffe, 0));
 284                                 break;
 285                         default:
 286                                 LOG_ERROR("BUG: unknown bank->size encountered");
 287                                 exit(-1);
 288                 }
 289
 290                 if ((retval = target_write_memory(target, lpc2000_info->iap_working_area->address, 4, 2, jump_gate)) != ERROR_OK)
 291                 {
 292                         LOG_ERROR("Write memory at address 0x%8.8" PRIx32 " failed (check work_area definition)", lpc2000_info->iap_working_area->address);
 293                         return retval;
 294                 }
 295         }
 296
 297         switch(lpc2000_info->variant)
 298         {
 299                 case lpc1700:
 300                         armv7m_info.common_magic = ARMV7M_COMMON_MAGIC;
 301                         armv7m_info.core_mode = ARMV7M_MODE_ANY;
 302                         iap_entry_point = 0x1fff1ff1;
 303                         break;
 304                 case lpc2000_v1:
 305                 case lpc2000_v2:
 306                         armv4_5_info.common_magic = ARM_COMMON_MAGIC;
 307                         armv4_5_info.core_mode = ARM_MODE_SVC;
 308                         armv4_5_info.core_state = ARM_STATE_ARM;
 309                         iap_entry_point = 0x7ffffff1;
 310                         break;
 311                 default:
 312                         LOG_ERROR("BUG: unknown lpc2000->variant encountered");
 313                         exit(-1);
 314         }
 315
 316         /* command parameter table */
 317         init_mem_param(&mem_params[0], lpc2000_info->iap_working_area->address + 8, 6 * 4, PARAM_OUT);
 318         target_buffer_set_u32(target, mem_params[0].value, code);
 319         target_buffer_set_u32(target, mem_params[0].value + 0x04, param_table[0]);
 320         target_buffer_set_u32(target, mem_params[0].value + 0x08, param_table[1]);
 321         target_buffer_set_u32(target, mem_params[0].value + 0x0c, param_table[2]);
 322         target_buffer_set_u32(target, mem_params[0].value + 0x10, param_table[3]);
 323         target_buffer_set_u32(target, mem_params[0].value + 0x14, param_table[4]);
 324
 325         init_reg_param(&reg_params[0], "r0", 32, PARAM_OUT);
 326         buf_set_u32(reg_params[0].value, 0, 32, lpc2000_info->iap_working_area->address + 0x08);
 327
 328         /* command result table */
 329         init_mem_param(&mem_params[1], lpc2000_info->iap_working_area->address + 0x20, 5 * 4, PARAM_IN);
 330
 331         init_reg_param(&reg_params[1], "r1", 32, PARAM_OUT);
 332         buf_set_u32(reg_params[1].value, 0, 32, lpc2000_info->iap_working_area->address + 0x20);
 333
 334         /* IAP entry point */
 335         init_reg_param(&reg_params[2], "r12", 32, PARAM_OUT);
 336         buf_set_u32(reg_params[2].value, 0, 32, iap_entry_point);
 337
 338         switch(lpc2000_info->variant)
 339         {
 340                 case lpc1700:
 341                         /* IAP stack */
 342                         init_reg_param(&reg_params[3], "sp", 32, PARAM_OUT);
 343                         buf_set_u32(reg_params[3].value, 0, 32, lpc2000_info->iap_working_area->address + 0xb4);
 344
 345                         /* return address */
 346                         init_reg_param(&reg_params[4], "lr", 32, PARAM_OUT);
 347                         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 */
 348
 349                         target_run_algorithm(target, 2, mem_params, 5, reg_params, lpc2000_info->iap_working_area->address, 0, 10000, &armv7m_info);
 350                         break;
 351                 case lpc2000_v1:
 352                 case lpc2000_v2:
 353                         /* IAP stack */
 354                         init_reg_param(&reg_params[3], "sp_svc", 32, PARAM_OUT);
 355                         buf_set_u32(reg_params[3].value, 0, 32, lpc2000_info->iap_working_area->address + 0xb4);
 356
 357                         /* return address */
 358                         init_reg_param(&reg_params[4], "lr_svc", 32, PARAM_OUT);
 359                         buf_set_u32(reg_params[4].value, 0, 32, lpc2000_info->iap_working_area->address + 0x04);
 360
 361                         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);
 362                         break;
 363                 default:
 364                         LOG_ERROR("BUG: unknown lpc2000->variant encountered");
 365                         exit(-1);
 366         }
 367
 368
 369         status_code     = target_buffer_get_u32(target, mem_params[1].value);
 370         result_table[0] = target_buffer_get_u32(target, mem_params[1].value + 0x04);
 371         result_table[1] = target_buffer_get_u32(target, mem_params[1].value + 0x08);
 372         result_table[2] = target_buffer_get_u32(target, mem_params[1].value + 0x0c);
 373         result_table[3] = target_buffer_get_u32(target, mem_params[1].value + 0x10);
 374
 375         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,
 376                           code, param_table[0], param_table[1], param_table[2], param_table[3], param_table[4], status_code);
 377
 378         destroy_mem_param(&mem_params[0]);
 379         destroy_mem_param(&mem_params[1]);
 380
 381         destroy_reg_param(&reg_params[0]);
 382         destroy_reg_param(&reg_params[1]);
 383         destroy_reg_param(&reg_params[2]);
 384         destroy_reg_param(&reg_params[3]);
 385         destroy_reg_param(&reg_params[4]);
 386
 387         return status_code;
 388 }
 389
 390 static int lpc2000_iap_blank_check(struct flash_bank *bank, int first, int last)
 391 {
 392         uint32_t param_table[5];
 393         uint32_t result_table[4];
 394         int status_code;
 395         int i;
 396
 397         if ((first < 0) || (last >= bank->num_sectors))
 398                 return ERROR_FLASH_SECTOR_INVALID;
 399
 400         for (i = first; i <= last; i++)
 401         {
 402                 /* check single sector */
 403                 param_table[0] = param_table[1] = i;
 404                 status_code = lpc2000_iap_call(bank, 53, param_table, result_table);
 405
 406                 switch (status_code)
 407                 {
 408                         case ERROR_FLASH_OPERATION_FAILED:
 409                                 return ERROR_FLASH_OPERATION_FAILED;
 410                         case LPC2000_CMD_SUCCESS:
 411                                 bank->sectors[i].is_erased = 1;
 412                                 break;
 413                         case LPC2000_SECTOR_NOT_BLANK:
 414                                 bank->sectors[i].is_erased = 0;
 415                                 break;
 416                         case LPC2000_INVALID_SECTOR:
 417                                 bank->sectors[i].is_erased = 0;
 418                                 break;
 419                         case LPC2000_BUSY:
 420                                 return ERROR_FLASH_BUSY;
 421                                 break;
 422                         default:
 423                                 LOG_ERROR("BUG: unknown LPC2000 status code %i", status_code);
 424                                 exit(-1);
 425                 }
 426         }
 427
 428         return ERROR_OK;
 429 }
 430
 431 /*
 432  * flash bank lpc2000 <base> <size> 0 0 <target#> <lpc_variant> <cclk> [calc_checksum]
 433  */
 434 FLASH_BANK_COMMAND_HANDLER(lpc2000_flash_bank_command)
 435 {
 436         struct lpc2000_flash_bank *lpc2000_info;
 437
 438         if (CMD_ARGC < 8)
 439         {
 440                 LOG_WARNING("incomplete flash_bank lpc2000 configuration");
 441                 return ERROR_FLASH_BANK_INVALID;
 442         }
 443
 444         lpc2000_info = malloc(sizeof(struct lpc2000_flash_bank));
 445         bank->driver_priv = lpc2000_info;
 446
 447         if (strcmp(CMD_ARGV[6], "lpc2000_v1") == 0)
 448         {
 449                 lpc2000_info->variant = lpc2000_v1;
 450                 lpc2000_info->cmd51_dst_boundary = 512;
 451                 lpc2000_info->cmd51_can_256b = 0;
 452                 lpc2000_info->cmd51_can_8192b = 1;
 453                 lpc2000_info->checksum_vector = 5;
 454         }
 455         else if (strcmp(CMD_ARGV[6], "lpc2000_v2") == 0)
 456         {
 457                 lpc2000_info->variant = lpc2000_v2;
 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 = 5;
 462         }
 463         else if (strcmp(CMD_ARGV[6], "lpc1700") == 0)
 464         {
 465                 lpc2000_info->variant = lpc1700;
 466                 lpc2000_info->cmd51_dst_boundary = 256;
 467                 lpc2000_info->cmd51_can_256b = 1;
 468                 lpc2000_info->cmd51_can_8192b = 0;
 469                 lpc2000_info->checksum_vector = 7;
 470         }
 471         else
 472         {
 473                 LOG_ERROR("unknown LPC2000 variant: %s", CMD_ARGV[6]);
 474                 free(lpc2000_info);
 475                 return ERROR_FLASH_BANK_INVALID;
 476         }
 477
 478         lpc2000_info->iap_working_area = NULL;
 479         COMMAND_PARSE_NUMBER(u32, CMD_ARGV[7], lpc2000_info->cclk);
 480         lpc2000_info->calc_checksum = 0;
 481         lpc2000_build_sector_list(bank);
 482
 483         if (CMD_ARGC >= 9)
 484         {
 485                 if (strcmp(CMD_ARGV[8], "calc_checksum") == 0)
 486                         lpc2000_info->calc_checksum = 1;
 487         }
 488
 489         return ERROR_OK;
 490 }
 491
 492 static int lpc2000_erase(struct flash_bank *bank, int first, int last)
 493 {
 494         struct lpc2000_flash_bank *lpc2000_info = bank->driver_priv;
 495         uint32_t param_table[5];
 496         uint32_t result_table[4];
 497         int status_code;
 498
 499         if (bank->target->state != TARGET_HALTED)
 500         {
 501                 LOG_ERROR("Target not halted");
 502                 return ERROR_TARGET_NOT_HALTED;
 503         }
 504
 505         param_table[0] = first;
 506         param_table[1] = last;
 507         param_table[2] = lpc2000_info->cclk;
 508
 509         /* Prepare sectors */
 510         status_code = lpc2000_iap_call(bank, 50, param_table, result_table);
 511         switch (status_code)
 512         {
 513                 case ERROR_FLASH_OPERATION_FAILED:
 514                         return ERROR_FLASH_OPERATION_FAILED;
 515                 case LPC2000_CMD_SUCCESS:
 516                         break;
 517                 case LPC2000_INVALID_SECTOR:
 518                         return ERROR_FLASH_SECTOR_INVALID;
 519                         break;
 520                 default:
 521                         LOG_WARNING("lpc2000 prepare sectors returned %i", status_code);
 522                         return ERROR_FLASH_OPERATION_FAILED;
 523         }
 524
 525         /* Erase sectors */
 526         status_code = lpc2000_iap_call(bank, 52, param_table, result_table);
 527         switch (status_code)
 528         {
 529                 case ERROR_FLASH_OPERATION_FAILED:
 530                         return ERROR_FLASH_OPERATION_FAILED;
 531                 case LPC2000_CMD_SUCCESS:
 532                         break;
 533                 case LPC2000_INVALID_SECTOR:
 534                         return ERROR_FLASH_SECTOR_INVALID;
 535                         break;
 536                 default:
 537                         LOG_WARNING("lpc2000 erase sectors returned %i", status_code);
 538                         return ERROR_FLASH_OPERATION_FAILED;
 539         }
 540
 541         return ERROR_OK;
 542 }
 543
 544 static int lpc2000_protect(struct flash_bank *bank, int set, int first, int last)
 545 {
 546         /* can't protect/unprotect on the lpc2000 */
 547         return ERROR_OK;
 548 }
 549
 550 static int lpc2000_write(struct flash_bank *bank, uint8_t *buffer, uint32_t offset, uint32_t count)
 551 {
 552         struct lpc2000_flash_bank *lpc2000_info = bank->driver_priv;
 553         struct target *target = bank->target;
 554         uint32_t dst_min_alignment;
 555         uint32_t bytes_remaining = count;
 556         uint32_t bytes_written = 0;
 557         int first_sector = 0;
 558         int last_sector = 0;
 559         uint32_t param_table[5];
 560         uint32_t result_table[4];
 561         int status_code;
 562         int i;
 563         struct working_area *download_area;
 564         int retval = ERROR_OK;
 565
 566         if (bank->target->state != TARGET_HALTED)
 567         {
 568                 LOG_ERROR("Target not halted");
 569                 return ERROR_TARGET_NOT_HALTED;
 570         }
 571
 572         if (offset + count > bank->size)
 573                 return ERROR_FLASH_DST_OUT_OF_BANK;
 574
 575         dst_min_alignment = lpc2000_info->cmd51_dst_boundary;
 576
 577         if (offset % dst_min_alignment)
 578         {
 579                 LOG_WARNING("offset 0x%" PRIx32 " breaks required alignment 0x%" PRIx32, offset, dst_min_alignment);
 580                 return ERROR_FLASH_DST_BREAKS_ALIGNMENT;
 581         }
 582
 583         for (i = 0; i < bank->num_sectors; i++)
 584         {
 585                 if (offset >= bank->sectors[i].offset)
 586                         first_sector = i;
 587                 if (offset + DIV_ROUND_UP(count, dst_min_alignment) * dst_min_alignment > bank->sectors[i].offset)
 588                         last_sector = i;
 589         }
 590
 591         LOG_DEBUG("first_sector: %i, last_sector: %i", first_sector, last_sector);
 592
 593         /* check if exception vectors should be flashed */
 594         if ((offset == 0) && (count >= 0x20) && lpc2000_info->calc_checksum)
 595         {
 596                 uint32_t checksum = 0;
 597                 for (i = 0; i < 8; i++)
 598                 {
 599                         LOG_DEBUG("Vector 0x%2.2x: 0x%8.8" PRIx32, i * 4, buf_get_u32(buffer + (i * 4), 0, 32));
 600                         if (i != lpc2000_info->checksum_vector)
 601                                 checksum += buf_get_u32(buffer + (i * 4), 0, 32);
 602                 }
 603                 checksum = 0 - checksum;
 604                 LOG_DEBUG("checksum: 0x%8.8" PRIx32, checksum);
 605
 606                 uint32_t original_value = buf_get_u32(buffer + (lpc2000_info->checksum_vector * 4), 0, 32);
 607                 if (original_value != checksum)
 608                 {
 609                         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 ").",
 610                                         original_value, checksum);
 611                         LOG_WARNING("To remove this warning modify build tools on developer PC to inject correct LPC vector checksum.");
 612                 }
 613
 614                 buf_set_u32(buffer + (lpc2000_info->checksum_vector * 4), 0, 32, checksum);
 615         }
 616
 617         /* allocate a working area */
 618         if (target_alloc_working_area(target, lpc2000_info->cmd51_max_buffer, &download_area) != ERROR_OK)
 619         {
 620                 LOG_ERROR("no working area specified, can't write LPC2000 internal flash");
 621                 return ERROR_FLASH_OPERATION_FAILED;
 622         }
 623
 624         while (bytes_remaining > 0)
 625         {
 626                 uint32_t thisrun_bytes;
 627                 if (bytes_remaining >= lpc2000_info->cmd51_max_buffer)
 628                         thisrun_bytes = lpc2000_info->cmd51_max_buffer;
 629                 else if (bytes_remaining >= 1024)
 630                         thisrun_bytes = 1024;
 631                 else if ((bytes_remaining >= 512) || (!lpc2000_info->cmd51_can_256b))
 632                         thisrun_bytes = 512;
 633                 else
 634                         thisrun_bytes = 256;
 635
 636                 /* Prepare sectors */
 637                 param_table[0] = first_sector;
 638                 param_table[1] = last_sector;
 639                 status_code = lpc2000_iap_call(bank, 50, param_table, result_table);
 640                 switch (status_code)
 641                 {
 642                         case ERROR_FLASH_OPERATION_FAILED:
 643                                 retval = ERROR_FLASH_OPERATION_FAILED;
 644                                 break;
 645                         case LPC2000_CMD_SUCCESS:
 646                                 break;
 647                         case LPC2000_INVALID_SECTOR:
 648                                 retval = ERROR_FLASH_SECTOR_INVALID;
 649                                 break;
 650                         default:
 651                                 LOG_WARNING("lpc2000 prepare sectors returned %i", status_code);
 652                                 retval = ERROR_FLASH_OPERATION_FAILED;
 653                                 break;
 654                 }
 655
 656                 /* Exit if error occured */
 657                 if (retval != ERROR_OK)
 658                         break;
 659
 660                 if (bytes_remaining >= thisrun_bytes)
 661                 {
 662                         if ((retval = target_write_buffer(bank->target, download_area->address, thisrun_bytes, buffer + bytes_written)) != ERROR_OK)
 663                         {
 664                                 retval = ERROR_FLASH_OPERATION_FAILED;
 665                                 break;
 666                         }
 667                 }
 668                 else
 669                 {
 670                         uint8_t *last_buffer = malloc(thisrun_bytes);
 671                         memcpy(last_buffer, buffer + bytes_written, bytes_remaining);
 672                         memset(last_buffer + bytes_remaining, 0xff, thisrun_bytes - bytes_remaining);
 673                         target_write_buffer(bank->target, download_area->address, thisrun_bytes, last_buffer);
 674                         free(last_buffer);
 675                 }
 676
 677                 LOG_DEBUG("writing 0x%" PRIx32 " bytes to address 0x%" PRIx32 , thisrun_bytes, bank->base + offset + bytes_written);
 678
 679                 /* Write data */
 680                 param_table[0] = bank->base + offset + bytes_written;
 681                 param_table[1] = download_area->address;
 682                 param_table[2] = thisrun_bytes;
 683                 param_table[3] = lpc2000_info->cclk;
 684                 status_code = lpc2000_iap_call(bank, 51, param_table, result_table);
 685                 switch (status_code)
 686                 {
 687                         case ERROR_FLASH_OPERATION_FAILED:
 688                                 retval = ERROR_FLASH_OPERATION_FAILED;
 689                                 break;
 690                         case LPC2000_CMD_SUCCESS:
 691                                 break;
 692                         case LPC2000_INVALID_SECTOR:
 693                                 retval = ERROR_FLASH_SECTOR_INVALID;
 694                                 break;
 695                         default:
 696                                 LOG_WARNING("lpc2000 returned %i", status_code);
 697                                 retval = ERROR_FLASH_OPERATION_FAILED;
 698                                 break;
 699                 }
 700
 701                 /* Exit if error occured */
 702                 if (retval != ERROR_OK)
 703                         break;
 704
 705                 if (bytes_remaining > thisrun_bytes)
 706                         bytes_remaining -= thisrun_bytes;
 707                 else
 708                         bytes_remaining = 0;
 709                 bytes_written += thisrun_bytes;
 710         }
 711
 712         target_free_working_area(target, download_area);
 713
 714         return retval;
 715 }
 716
 717 static int lpc2000_probe(struct flash_bank *bank)
 718 {
 719         /* we can't probe on an lpc2000
 720          * if this is an lpc2xxx, it has the configured flash
 721          */
 722         return ERROR_OK;
 723 }
 724
 725 static int lpc2000_erase_check(struct flash_bank *bank)
 726 {
 727         if (bank->target->state != TARGET_HALTED)
 728         {
 729                 LOG_ERROR("Target not halted");
 730                 return ERROR_TARGET_NOT_HALTED;
 731         }
 732
 733         return lpc2000_iap_blank_check(bank, 0, bank->num_sectors - 1);
 734 }
 735
 736 static int lpc2000_protect_check(struct flash_bank *bank)
 737 {
 738         /* sectors are always protected */
 739         return ERROR_OK;
 740 }
 741
 742 static int get_lpc2000_info(struct flash_bank *bank, char *buf, int buf_size)
 743 {
 744         struct lpc2000_flash_bank *lpc2000_info = bank->driver_priv;
 745
 746         snprintf(buf, buf_size, "lpc2000 flash driver variant: %i, clk: %" PRIi32 "kHz" , lpc2000_info->variant, lpc2000_info->cclk);
 747
 748         return ERROR_OK;
 749 }
 750
 751 COMMAND_HANDLER(lpc2000_handle_part_id_command)
 752 {
 753         uint32_t param_table[5];
 754         uint32_t result_table[4];
 755         int status_code;
 756
 757         if (CMD_ARGC < 1)
 758         {
 759                 return ERROR_COMMAND_SYNTAX_ERROR;
 760         }
 761
 762         struct flash_bank *bank;
 763         int retval = CALL_COMMAND_HANDLER(flash_command_get_bank, 0, &bank);
 764         if (ERROR_OK != retval)
 765                 return retval;
 766
 767         if (bank->target->state != TARGET_HALTED)
 768         {
 769                 LOG_ERROR("Target not halted");
 770                 return ERROR_TARGET_NOT_HALTED;
 771         }
 772
 773         if ((status_code = lpc2000_iap_call(bank, 54, param_table, result_table)) != 0x0)
 774         {
 775                 if (status_code == ERROR_FLASH_OPERATION_FAILED)
 776                 {
 777                         command_print(CMD_CTX, "no sufficient working area specified, can't access LPC2000 IAP interface");
 778                         return ERROR_OK;
 779                 }
 780                 command_print(CMD_CTX, "lpc2000 IAP returned status code %i", status_code);
 781         }
 782         else
 783         {
 784                 command_print(CMD_CTX, "lpc2000 part id: 0x%8.8" PRIx32 , result_table[0]);
 785         }
 786
 787         return ERROR_OK;
 788 }
 789
 790 static const struct command_registration lpc2000_exec_command_handlers[] = {
 791         {
 792                 .name = "part_id",
 793                 .handler = lpc2000_handle_part_id_command,
 794                 .mode = COMMAND_EXEC,
 795                 .help = "print part id of lpc2000 flash bank <num>",
 796         },
 797         COMMAND_REGISTRATION_DONE
 798 };
 799 static const struct command_registration lpc2000_command_handlers[] = {
 800         {
 801                 .name = "lpc2000",
 802                 .mode = COMMAND_ANY,
 803                 .help = "lpc2000 flash command group",
 804                 .chain = lpc2000_exec_command_handlers,
 805         },
 806         COMMAND_REGISTRATION_DONE
 807 };
 808
 809 struct flash_driver lpc2000_flash = {
 810         .name = "lpc2000",
 811         .commands = lpc2000_command_handlers,
 812         .flash_bank_command = lpc2000_flash_bank_command,
 813         .erase = lpc2000_erase,
 814         .protect = lpc2000_protect,
 815         .write = lpc2000_write,
 816         .read = default_flash_read,
 817         .probe = lpc2000_probe,
 818         .auto_probe = lpc2000_probe,
 819         .erase_check = lpc2000_erase_check,
 820         .protect_check = lpc2000_protect_check,
 821         .info = get_lpc2000_info,
 822 };