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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 <helper/binarybuffer.h>
  30 #include <target/algorithm.h>
  31 #include <target/arm_opcodes.h>
  32 #include <target/armv7m.h>
  33
  34
  35 /**
  36  * @file
  37  * flash programming support for NXP LPC17xx and LPC2xxx devices.
  38  *
  39  * @todo Provide a way to update CCLK after declaring the flash bank.
  40  * The value which is correct after chip reset will rarely still work
  41  * right after the clocks switch to use the PLL (e.g. 4MHz --> 100 MHz).
  42  */
  43 /*
  44  * currently supported devices:
  45  * variant 1 (lpc2000_v1):
  46  * - 2104 | 5 | 6
  47  * - 2114 | 9
  48  * - 2124 | 9
  49  * - 2194
  50  * - 2212 | 4
  51  * - 2292 | 4
  52  *
  53  * variant 2 (lpc2000_v2):
  54  * - 213x
  55  * - 214x
  56  * - 2101 | 2 | 3
  57  * - 2364 | 6 | 8
  58  * - 2378
  59  *
  60  * lpc1700:
  61  * - 175x
  62  * - 176x (tested with LPC1768)
  63  */
  64
  65 typedef enum
  66 {
  67         lpc2000_v1,
  68         lpc2000_v2,
  69         lpc1700
  70 } lpc2000_variant;
  71
  72 struct lpc2000_flash_bank
  73 {
  74         lpc2000_variant variant;
  75         struct working_area *iap_working_area;
  76         uint32_t cclk;
  77         int cmd51_dst_boundary;
  78         int cmd51_can_256b;
  79         int cmd51_can_8192b;
  80         int calc_checksum;
  81         uint32_t cmd51_max_buffer;
  82         int checksum_vector;
  83 };
  84
  85 enum lpc2000_status_codes
  86 {
  87         LPC2000_CMD_SUCCESS = 0,
  88         LPC2000_INVALID_COMMAND = 1,
  89         LPC2000_SRC_ADDR_ERROR = 2,
  90         LPC2000_DST_ADDR_ERROR = 3,
  91         LPC2000_SRC_ADDR_NOT_MAPPED = 4,
  92         LPC2000_DST_ADDR_NOT_MAPPED = 5,
  93         LPC2000_COUNT_ERROR = 6,
  94         LPC2000_INVALID_SECTOR = 7,
  95         LPC2000_SECTOR_NOT_BLANK = 8,
  96         LPC2000_SECTOR_NOT_PREPARED = 9,
  97         LPC2000_COMPARE_ERROR = 10,
  98         LPC2000_BUSY = 11,
  99         LPC2000_PARAM_ERROR = 12,
 100         LPC2000_ADDR_ERROR = 13,
 101         LPC2000_ADDR_NOT_MAPPED = 14,
 102         LPC2000_CMD_NOT_LOCKED = 15,
 103         LPC2000_INVALID_CODE = 16,
 104         LPC2000_INVALID_BAUD_RATE = 17,
 105         LPC2000_INVALID_STOP_BIT = 18,
 106         LPC2000_CRP_ENABLED = 19
 107
 108 };
 109
 110 static int lpc2000_build_sector_list(struct flash_bank *bank)
 111 {
 112         struct lpc2000_flash_bank *lpc2000_info = bank->driver_priv;
 113         int i;
 114         uint32_t offset = 0;
 115
 116         /* default to a 4096 write buffer */
 117         lpc2000_info->cmd51_max_buffer = 4096;
 118
 119         if (lpc2000_info->variant == lpc2000_v1)
 120         {
 121                 /* variant 1 has different layout for 128kb and 256kb flashes */
 122                 if (bank->size == 128 * 1024)
 123                 {
 124                         bank->num_sectors = 16;
 125                         bank->sectors = malloc(sizeof(struct flash_sector) * 16);
 126                         for (i = 0; i < 16; i++)
 127                         {
 128                                 bank->sectors[i].offset = offset;
 129                                 bank->sectors[i].size = 8 * 1024;
 130                                 offset += bank->sectors[i].size;
 131                                 bank->sectors[i].is_erased = -1;
 132                                 bank->sectors[i].is_protected = 1;
 133                         }
 134                 }
 135                 else if (bank->size == 256 * 1024)
 136                 {
 137                         bank->num_sectors = 18;
 138                         bank->sectors = malloc(sizeof(struct flash_sector) * 18);
 139
 140                         for (i = 0; i < 8; i++)
 141                         {
 142                                 bank->sectors[i].offset = offset;
 143                                 bank->sectors[i].size = 8 * 1024;
 144                                 offset += bank->sectors[i].size;
 145                                 bank->sectors[i].is_erased = -1;
 146                                 bank->sectors[i].is_protected = 1;
 147                         }
 148                         for (i = 8; i < 10; i++)
 149                         {
 150                                 bank->sectors[i].offset = offset;
 151                                 bank->sectors[i].size = 64 * 1024;
 152                                 offset += bank->sectors[i].size;
 153                                 bank->sectors[i].is_erased = -1;
 154                                 bank->sectors[i].is_protected = 1;
 155                         }
 156                         for (i = 10; i < 18; i++)
 157                         {
 158                                 bank->sectors[i].offset = offset;
 159                                 bank->sectors[i].size = 8 * 1024;
 160                                 offset += bank->sectors[i].size;
 161                                 bank->sectors[i].is_erased = -1;
 162                                 bank->sectors[i].is_protected = 1;
 163                         }
 164                 }
 165                 else
 166                 {
 167                         LOG_ERROR("BUG: unknown bank->size encountered");
 168                         exit(-1);
 169                 }
 170         }
 171         else if (lpc2000_info->variant == lpc2000_v2)
 172         {
 173                 /* variant 2 has a uniform layout, only number of sectors differs */
 174                 switch (bank->size)
 175                 {
 176                         case 4 * 1024:
 177                                 lpc2000_info->cmd51_max_buffer = 1024;
 178                                 bank->num_sectors = 1;
 179                                 break;
 180                         case 8 * 1024:
 181                                 lpc2000_info->cmd51_max_buffer = 1024;
 182                                 bank->num_sectors = 2;
 183                                 break;
 184                         case 16 * 1024:
 185                                 bank->num_sectors = 4;
 186                                 break;
 187                         case 32 * 1024:
 188                                 bank->num_sectors = 8;
 189                                 break;
 190                         case 64 * 1024:
 191                                 bank->num_sectors = 9;
 192                                 break;
 193                         case 128 * 1024:
 194                                 bank->num_sectors = 11;
 195                                 break;
 196                         case 256 * 1024:
 197                                 bank->num_sectors = 15;
 198                                 break;
 199                         case 500 * 1024:
 200                                 bank->num_sectors = 27;
 201                                 break;
 202                         case 512 * 1024:
 203                         case 504 * 1024:
 204                                 bank->num_sectors = 28;
 205                                 break;
 206                         default:
 207                                 LOG_ERROR("BUG: unknown bank->size encountered");
 208                                 exit(-1);
 209                                 break;
 210                 }
 211
 212                 bank->sectors = malloc(sizeof(struct flash_sector) * bank->num_sectors);
 213
 214                 for (i = 0; i < bank->num_sectors; i++)
 215                 {
 216                         if (i < 8)
 217                         {
 218                                 bank->sectors[i].offset = offset;
 219                                 bank->sectors[i].size = 4 * 1024;
 220                                 offset += bank->sectors[i].size;
 221                                 bank->sectors[i].is_erased = -1;
 222                                 bank->sectors[i].is_protected = 1;
 223                         }
 224                         else if (i < 22)
 225                         {
 226                                 bank->sectors[i].offset = offset;
 227                                 bank->sectors[i].size = 32 * 1024;
 228                                 offset += bank->sectors[i].size;
 229                                 bank->sectors[i].is_erased = -1;
 230                                 bank->sectors[i].is_protected = 1;
 231                         }
 232                         else if (i < 28)
 233                         {
 234                                 bank->sectors[i].offset = offset;
 235                                 bank->sectors[i].size = 4 * 1024;
 236                                 offset += bank->sectors[i].size;
 237                                 bank->sectors[i].is_erased = -1;
 238                                 bank->sectors[i].is_protected = 1;
 239                         }
 240                 }
 241         }
 242         else if (lpc2000_info->variant == lpc1700)
 243         {
 244                 switch(bank->size)
 245                 {
 246                         case 32 * 1024:
 247                                 bank->num_sectors = 8;
 248                                 break;
 249                         case 64 * 1024:
 250                                 bank->num_sectors = 16;
 251                                 break;
 252                         case 128 * 1024:
 253                                 bank->num_sectors = 18;
 254                                 break;
 255                         case 256 * 1024:
 256                                 bank->num_sectors = 22;
 257                                 break;
 258                         case 512 * 1024:
 259                                 bank->num_sectors = 30;
 260                                 break;
 261                         default:
 262                                 LOG_ERROR("BUG: unknown bank->size encountered");
 263                                 exit(-1);
 264                 }
 265
 266                 bank->sectors = malloc(sizeof(struct flash_sector) * bank->num_sectors);
 267
 268                 for(i = 0; i < bank->num_sectors; i++)
 269                 {
 270                         bank->sectors[i].offset = offset;
 271                         /* sectors 0-15 are 4kB-sized, 16 and above are 32kB-sized for LPC17xx devices */
 272                         bank->sectors[i].size = (i < 16)? 4 * 1024 : 32 * 1024;
 273                         offset += bank->sectors[i].size;
 274                         bank->sectors[i].is_erased = -1;
 275                         bank->sectors[i].is_protected = 1;
 276                 }
 277         }
 278         else
 279         {
 280                 LOG_ERROR("BUG: unknown lpc2000_info->variant encountered");
 281                 exit(-1);
 282         }
 283
 284         return ERROR_OK;
 285 }
 286
 287 /* call LPC1700/LPC2000 IAP function
 288  * uses 180 bytes working area
 289  * 0x0 to 0x7: jump gate (BX to thumb state, b -2 to wait)
 290  * 0x8 to 0x1f: command parameter table (1+5 words)
 291  * 0x20 to 0x33: command result table (1+4 words)
 292  * 0x34 to 0xb3: stack (only 128b needed)
 293  */
 294 static int lpc2000_iap_call(struct flash_bank *bank, int code, uint32_t param_table[5], uint32_t result_table[4])
 295 {
 296         int retval;
 297         struct lpc2000_flash_bank *lpc2000_info = bank->driver_priv;
 298         struct target *target = bank->target;
 299         struct mem_param mem_params[2];
 300         struct reg_param reg_params[5];
 301         struct arm_algorithm armv4_5_info; /* for LPC2000 */
 302         struct armv7m_algorithm armv7m_info;   /* for LPC1700 */
 303         uint32_t status_code;
 304         uint32_t iap_entry_point = 0; /* to make compiler happier */
 305
 306         /* regrab previously allocated working_area, or allocate a new one */
 307         if (!lpc2000_info->iap_working_area)
 308         {
 309                 uint8_t jump_gate[8];
 310
 311                 /* make sure we have a working area */
 312                 if (target_alloc_working_area(target, 180, &lpc2000_info->iap_working_area) != ERROR_OK)
 313                 {
 314                         LOG_ERROR("no working area specified, can't write LPC2000 internal flash");
 315                         return ERROR_FLASH_OPERATION_FAILED;
 316                 }
 317
 318                 /* write IAP code to working area */
 319                 switch(lpc2000_info->variant)
 320                 {
 321                         case lpc1700:
 322                                 target_buffer_set_u32(target, jump_gate,
 323                                                 ARMV4_5_T_BX(12));
 324                                 target_buffer_set_u32(target, jump_gate + 4,
 325                                                 ARMV5_T_BKPT(0));
 326                                 break;
 327                         case lpc2000_v1:
 328                         case lpc2000_v2:
 329                                 target_buffer_set_u32(target, jump_gate, ARMV4_5_BX(12));
 330                                 target_buffer_set_u32(target, jump_gate + 4, ARMV4_5_B(0xfffffe, 0));
 331                                 break;
 332                         default:
 333                                 LOG_ERROR("BUG: unknown bank->size encountered");
 334                                 exit(-1);
 335                 }
 336
 337                 if ((retval = target_write_memory(target, lpc2000_info->iap_working_area->address, 4, 2, jump_gate)) != ERROR_OK)
 338                 {
 339                         LOG_ERROR("Write memory at address 0x%8.8" PRIx32 " failed (check work_area definition)", lpc2000_info->iap_working_area->address);
 340                         return retval;
 341                 }
 342         }
 343
 344         switch(lpc2000_info->variant)
 345         {
 346                 case lpc1700:
 347                         armv7m_info.common_magic = ARMV7M_COMMON_MAGIC;
 348                         armv7m_info.core_mode = ARMV7M_MODE_ANY;
 349                         iap_entry_point = 0x1fff1ff1;
 350                         break;
 351                 case lpc2000_v1:
 352                 case lpc2000_v2:
 353                         armv4_5_info.common_magic = ARM_COMMON_MAGIC;
 354                         armv4_5_info.core_mode = ARM_MODE_SVC;
 355                         armv4_5_info.core_state = ARM_STATE_ARM;
 356                         iap_entry_point = 0x7ffffff1;
 357                         break;
 358                 default:
 359                         LOG_ERROR("BUG: unknown lpc2000->variant encountered");
 360                         exit(-1);
 361         }
 362
 363         /* command parameter table */
 364         init_mem_param(&mem_params[0], lpc2000_info->iap_working_area->address + 8, 6 * 4, PARAM_OUT);
 365         target_buffer_set_u32(target, mem_params[0].value, code);
 366         target_buffer_set_u32(target, mem_params[0].value + 0x04, param_table[0]);
 367         target_buffer_set_u32(target, mem_params[0].value + 0x08, param_table[1]);
 368         target_buffer_set_u32(target, mem_params[0].value + 0x0c, param_table[2]);
 369         target_buffer_set_u32(target, mem_params[0].value + 0x10, param_table[3]);
 370         target_buffer_set_u32(target, mem_params[0].value + 0x14, param_table[4]);
 371
 372         init_reg_param(&reg_params[0], "r0", 32, PARAM_OUT);
 373         buf_set_u32(reg_params[0].value, 0, 32, lpc2000_info->iap_working_area->address + 0x08);
 374
 375         /* command result table */
 376         init_mem_param(&mem_params[1], lpc2000_info->iap_working_area->address + 0x20, 5 * 4, PARAM_IN);
 377
 378         init_reg_param(&reg_params[1], "r1", 32, PARAM_OUT);
 379         buf_set_u32(reg_params[1].value, 0, 32, lpc2000_info->iap_working_area->address + 0x20);
 380
 381         /* IAP entry point */
 382         init_reg_param(&reg_params[2], "r12", 32, PARAM_OUT);
 383         buf_set_u32(reg_params[2].value, 0, 32, iap_entry_point);
 384
 385         switch(lpc2000_info->variant)
 386         {
 387                 case lpc1700:
 388                         /* IAP stack */
 389                         init_reg_param(&reg_params[3], "sp", 32, PARAM_OUT);
 390                         buf_set_u32(reg_params[3].value, 0, 32, lpc2000_info->iap_working_area->address + 0xb4);
 391
 392                         /* return address */
 393                         init_reg_param(&reg_params[4], "lr", 32, PARAM_OUT);
 394                         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 */
 395
 396                         target_run_algorithm(target, 2, mem_params, 5, reg_params, lpc2000_info->iap_working_area->address, 0, 10000, &armv7m_info);
 397                         break;
 398                 case lpc2000_v1:
 399                 case lpc2000_v2:
 400                         /* IAP stack */
 401                         init_reg_param(&reg_params[3], "sp_svc", 32, PARAM_OUT);
 402                         buf_set_u32(reg_params[3].value, 0, 32, lpc2000_info->iap_working_area->address + 0xb4);
 403
 404                         /* return address */
 405                         init_reg_param(&reg_params[4], "lr_svc", 32, PARAM_OUT);
 406                         buf_set_u32(reg_params[4].value, 0, 32, lpc2000_info->iap_working_area->address + 0x04);
 407
 408                         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);
 409                         break;
 410                 default:
 411                         LOG_ERROR("BUG: unknown lpc2000->variant encountered");
 412                         exit(-1);
 413         }
 414
 415
 416         status_code     = target_buffer_get_u32(target, mem_params[1].value);
 417         result_table[0] = target_buffer_get_u32(target, mem_params[1].value + 0x04);
 418         result_table[1] = target_buffer_get_u32(target, mem_params[1].value + 0x08);
 419         result_table[2] = target_buffer_get_u32(target, mem_params[1].value + 0x0c);
 420         result_table[3] = target_buffer_get_u32(target, mem_params[1].value + 0x10);
 421
 422         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,
 423                           code, param_table[0], param_table[1], param_table[2], param_table[3], param_table[4], status_code);
 424
 425         destroy_mem_param(&mem_params[0]);
 426         destroy_mem_param(&mem_params[1]);
 427
 428         destroy_reg_param(&reg_params[0]);
 429         destroy_reg_param(&reg_params[1]);
 430         destroy_reg_param(&reg_params[2]);
 431         destroy_reg_param(&reg_params[3]);
 432         destroy_reg_param(&reg_params[4]);
 433
 434         return status_code;
 435 }
 436
 437 static int lpc2000_iap_blank_check(struct flash_bank *bank, int first, int last)
 438 {
 439         uint32_t param_table[5];
 440         uint32_t result_table[4];
 441         int status_code;
 442         int i;
 443
 444         if ((first < 0) || (last >= bank->num_sectors))
 445                 return ERROR_FLASH_SECTOR_INVALID;
 446
 447         for (i = first; i <= last; i++)
 448         {
 449                 /* check single sector */
 450                 param_table[0] = param_table[1] = i;
 451                 status_code = lpc2000_iap_call(bank, 53, param_table, result_table);
 452
 453                 switch (status_code)
 454                 {
 455                         case ERROR_FLASH_OPERATION_FAILED:
 456                                 return ERROR_FLASH_OPERATION_FAILED;
 457                         case LPC2000_CMD_SUCCESS:
 458                                 bank->sectors[i].is_erased = 1;
 459                                 break;
 460                         case LPC2000_SECTOR_NOT_BLANK:
 461                                 bank->sectors[i].is_erased = 0;
 462                                 break;
 463                         case LPC2000_INVALID_SECTOR:
 464                                 bank->sectors[i].is_erased = 0;
 465                                 break;
 466                         case LPC2000_BUSY:
 467                                 return ERROR_FLASH_BUSY;
 468                                 break;
 469                         default:
 470                                 LOG_ERROR("BUG: unknown LPC2000 status code %i", status_code);
 471                                 exit(-1);
 472                 }
 473         }
 474
 475         return ERROR_OK;
 476 }
 477
 478 /*
 479  * flash bank lpc2000 <base> <size> 0 0 <target#> <lpc_variant> <cclk> [calc_checksum]
 480  */
 481 FLASH_BANK_COMMAND_HANDLER(lpc2000_flash_bank_command)
 482 {
 483         struct lpc2000_flash_bank *lpc2000_info;
 484
 485         if (CMD_ARGC < 8)
 486         {
 487                 LOG_WARNING("incomplete flash_bank lpc2000 configuration");
 488                 return ERROR_FLASH_BANK_INVALID;
 489         }
 490
 491         lpc2000_info = malloc(sizeof(struct lpc2000_flash_bank));
 492         bank->driver_priv = lpc2000_info;
 493
 494         if (strcmp(CMD_ARGV[6], "lpc2000_v1") == 0)
 495         {
 496                 lpc2000_info->variant = lpc2000_v1;
 497                 lpc2000_info->cmd51_dst_boundary = 512;
 498                 lpc2000_info->cmd51_can_256b = 0;
 499                 lpc2000_info->cmd51_can_8192b = 1;
 500                 lpc2000_info->checksum_vector = 5;
 501         }
 502         else if (strcmp(CMD_ARGV[6], "lpc2000_v2") == 0)
 503         {
 504                 lpc2000_info->variant = lpc2000_v2;
 505                 lpc2000_info->cmd51_dst_boundary = 256;
 506                 lpc2000_info->cmd51_can_256b = 1;
 507                 lpc2000_info->cmd51_can_8192b = 0;
 508                 lpc2000_info->checksum_vector = 5;
 509         }
 510         else if (strcmp(CMD_ARGV[6], "lpc1700") == 0)
 511         {
 512                 lpc2000_info->variant = lpc1700;
 513                 lpc2000_info->cmd51_dst_boundary = 256;
 514                 lpc2000_info->cmd51_can_256b = 1;
 515                 lpc2000_info->cmd51_can_8192b = 0;
 516                 lpc2000_info->checksum_vector = 7;
 517         }
 518         else
 519         {
 520                 LOG_ERROR("unknown LPC2000 variant: %s", CMD_ARGV[6]);
 521                 free(lpc2000_info);
 522                 return ERROR_FLASH_BANK_INVALID;
 523         }
 524
 525         lpc2000_info->iap_working_area = NULL;
 526         COMMAND_PARSE_NUMBER(u32, CMD_ARGV[7], lpc2000_info->cclk);
 527         lpc2000_info->calc_checksum = 0;
 528         lpc2000_build_sector_list(bank);
 529
 530         if (CMD_ARGC >= 9)
 531         {
 532                 if (strcmp(CMD_ARGV[8], "calc_checksum") == 0)
 533                         lpc2000_info->calc_checksum = 1;
 534         }
 535
 536         return ERROR_OK;
 537 }
 538
 539 static int lpc2000_erase(struct flash_bank *bank, int first, int last)
 540 {
 541         struct lpc2000_flash_bank *lpc2000_info = bank->driver_priv;
 542         uint32_t param_table[5];
 543         uint32_t result_table[4];
 544         int status_code;
 545
 546         if (bank->target->state != TARGET_HALTED)
 547         {
 548                 LOG_ERROR("Target not halted");
 549                 return ERROR_TARGET_NOT_HALTED;
 550         }
 551
 552         param_table[0] = first;
 553         param_table[1] = last;
 554         param_table[2] = lpc2000_info->cclk;
 555
 556         /* Prepare sectors */
 557         status_code = lpc2000_iap_call(bank, 50, param_table, result_table);
 558         switch (status_code)
 559         {
 560                 case ERROR_FLASH_OPERATION_FAILED:
 561                         return ERROR_FLASH_OPERATION_FAILED;
 562                 case LPC2000_CMD_SUCCESS:
 563                         break;
 564                 case LPC2000_INVALID_SECTOR:
 565                         return ERROR_FLASH_SECTOR_INVALID;
 566                         break;
 567                 default:
 568                         LOG_WARNING("lpc2000 prepare sectors returned %i", status_code);
 569                         return ERROR_FLASH_OPERATION_FAILED;
 570         }
 571
 572         /* Erase sectors */
 573         status_code = lpc2000_iap_call(bank, 52, param_table, result_table);
 574         switch (status_code)
 575         {
 576                 case ERROR_FLASH_OPERATION_FAILED:
 577                         return ERROR_FLASH_OPERATION_FAILED;
 578                 case LPC2000_CMD_SUCCESS:
 579                         break;
 580                 case LPC2000_INVALID_SECTOR:
 581                         return ERROR_FLASH_SECTOR_INVALID;
 582                         break;
 583                 default:
 584                         LOG_WARNING("lpc2000 erase sectors returned %i", status_code);
 585                         return ERROR_FLASH_OPERATION_FAILED;
 586         }
 587
 588         return ERROR_OK;
 589 }
 590
 591 static int lpc2000_protect(struct flash_bank *bank, int set, int first, int last)
 592 {
 593         /* can't protect/unprotect on the lpc2000 */
 594         return ERROR_OK;
 595 }
 596
 597 static int lpc2000_write(struct flash_bank *bank, uint8_t *buffer, uint32_t offset, uint32_t count)
 598 {
 599         struct lpc2000_flash_bank *lpc2000_info = bank->driver_priv;
 600         struct target *target = bank->target;
 601         uint32_t dst_min_alignment;
 602         uint32_t bytes_remaining = count;
 603         uint32_t bytes_written = 0;
 604         int first_sector = 0;
 605         int last_sector = 0;
 606         uint32_t param_table[5];
 607         uint32_t result_table[4];
 608         int status_code;
 609         int i;
 610         struct working_area *download_area;
 611         int retval = ERROR_OK;
 612
 613         if (bank->target->state != TARGET_HALTED)
 614         {
 615                 LOG_ERROR("Target not halted");
 616                 return ERROR_TARGET_NOT_HALTED;
 617         }
 618
 619         if (offset + count > bank->size)
 620                 return ERROR_FLASH_DST_OUT_OF_BANK;
 621
 622         dst_min_alignment = lpc2000_info->cmd51_dst_boundary;
 623
 624         if (offset % dst_min_alignment)
 625         {
 626                 LOG_WARNING("offset 0x%" PRIx32 " breaks required alignment 0x%" PRIx32, offset, dst_min_alignment);
 627                 return ERROR_FLASH_DST_BREAKS_ALIGNMENT;
 628         }
 629
 630         for (i = 0; i < bank->num_sectors; i++)
 631         {
 632                 if (offset >= bank->sectors[i].offset)
 633                         first_sector = i;
 634                 if (offset + DIV_ROUND_UP(count, dst_min_alignment) * dst_min_alignment > bank->sectors[i].offset)
 635                         last_sector = i;
 636         }
 637
 638         LOG_DEBUG("first_sector: %i, last_sector: %i", first_sector, last_sector);
 639
 640         /* check if exception vectors should be flashed */
 641         if ((offset == 0) && (count >= 0x20) && lpc2000_info->calc_checksum)
 642         {
 643                 uint32_t checksum = 0;
 644                 for (i = 0; i < 8; i++)
 645                 {
 646                         LOG_DEBUG("Vector 0x%2.2x: 0x%8.8" PRIx32, i * 4, buf_get_u32(buffer + (i * 4), 0, 32));
 647                         if (i != lpc2000_info->checksum_vector)
 648                                 checksum += buf_get_u32(buffer + (i * 4), 0, 32);
 649                 }
 650                 checksum = 0 - checksum;
 651                 LOG_DEBUG("checksum: 0x%8.8" PRIx32, checksum);
 652
 653                 uint32_t original_value = buf_get_u32(buffer + (lpc2000_info->checksum_vector * 4), 0, 32);
 654                 if (original_value != checksum)
 655                 {
 656                         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 ").",
 657                                         original_value, checksum);
 658                         LOG_WARNING("To remove this warning modify build tools on developer PC to inject correct LPC vector checksum.");
 659                 }
 660
 661                 buf_set_u32(buffer + (lpc2000_info->checksum_vector * 4), 0, 32, checksum);
 662         }
 663
 664         /* allocate a working area */
 665         if (target_alloc_working_area(target, lpc2000_info->cmd51_max_buffer, &download_area) != ERROR_OK)
 666         {
 667                 LOG_ERROR("no working area specified, can't write LPC2000 internal flash");
 668                 return ERROR_FLASH_OPERATION_FAILED;
 669         }
 670
 671         while (bytes_remaining > 0)
 672         {
 673                 uint32_t thisrun_bytes;
 674                 if (bytes_remaining >= lpc2000_info->cmd51_max_buffer)
 675                         thisrun_bytes = lpc2000_info->cmd51_max_buffer;
 676                 else if (bytes_remaining >= 1024)
 677                         thisrun_bytes = 1024;
 678                 else if ((bytes_remaining >= 512) || (!lpc2000_info->cmd51_can_256b))
 679                         thisrun_bytes = 512;
 680                 else
 681                         thisrun_bytes = 256;
 682
 683                 /* Prepare sectors */
 684                 param_table[0] = first_sector;
 685                 param_table[1] = last_sector;
 686                 status_code = lpc2000_iap_call(bank, 50, param_table, result_table);
 687                 switch (status_code)
 688                 {
 689                         case ERROR_FLASH_OPERATION_FAILED:
 690                                 retval = ERROR_FLASH_OPERATION_FAILED;
 691                                 break;
 692                         case LPC2000_CMD_SUCCESS:
 693                                 break;
 694                         case LPC2000_INVALID_SECTOR:
 695                                 retval = ERROR_FLASH_SECTOR_INVALID;
 696                                 break;
 697                         default:
 698                                 LOG_WARNING("lpc2000 prepare sectors returned %i", status_code);
 699                                 retval = ERROR_FLASH_OPERATION_FAILED;
 700                                 break;
 701                 }
 702
 703                 /* Exit if error occured */
 704                 if (retval != ERROR_OK)
 705                         break;
 706
 707                 if (bytes_remaining >= thisrun_bytes)
 708                 {
 709                         if ((retval = target_write_buffer(bank->target, download_area->address, thisrun_bytes, buffer + bytes_written)) != ERROR_OK)
 710                         {
 711                                 retval = ERROR_FLASH_OPERATION_FAILED;
 712                                 break;
 713                         }
 714                 }
 715                 else
 716                 {
 717                         uint8_t *last_buffer = malloc(thisrun_bytes);
 718                         memcpy(last_buffer, buffer + bytes_written, bytes_remaining);
 719                         memset(last_buffer + bytes_remaining, 0xff, thisrun_bytes - bytes_remaining);
 720                         target_write_buffer(bank->target, download_area->address, thisrun_bytes, last_buffer);
 721                         free(last_buffer);
 722                 }
 723
 724                 LOG_DEBUG("writing 0x%" PRIx32 " bytes to address 0x%" PRIx32 , thisrun_bytes, bank->base + offset + bytes_written);
 725
 726                 /* Write data */
 727                 param_table[0] = bank->base + offset + bytes_written;
 728                 param_table[1] = download_area->address;
 729                 param_table[2] = thisrun_bytes;
 730                 param_table[3] = lpc2000_info->cclk;
 731                 status_code = lpc2000_iap_call(bank, 51, param_table, result_table);
 732                 switch (status_code)
 733                 {
 734                         case ERROR_FLASH_OPERATION_FAILED:
 735                                 retval = ERROR_FLASH_OPERATION_FAILED;
 736                                 break;
 737                         case LPC2000_CMD_SUCCESS:
 738                                 break;
 739                         case LPC2000_INVALID_SECTOR:
 740                                 retval = ERROR_FLASH_SECTOR_INVALID;
 741                                 break;
 742                         default:
 743                                 LOG_WARNING("lpc2000 returned %i", status_code);
 744                                 retval = ERROR_FLASH_OPERATION_FAILED;
 745                                 break;
 746                 }
 747
 748                 /* Exit if error occured */
 749                 if (retval != ERROR_OK)
 750                         break;
 751
 752                 if (bytes_remaining > thisrun_bytes)
 753                         bytes_remaining -= thisrun_bytes;
 754                 else
 755                         bytes_remaining = 0;
 756                 bytes_written += thisrun_bytes;
 757         }
 758
 759         target_free_working_area(target, download_area);
 760
 761         return retval;
 762 }
 763
 764 static int lpc2000_probe(struct flash_bank *bank)
 765 {
 766         /* we can't probe on an lpc2000
 767          * if this is an lpc2xxx, it has the configured flash
 768          */
 769         return ERROR_OK;
 770 }
 771
 772 static int lpc2000_erase_check(struct flash_bank *bank)
 773 {
 774         if (bank->target->state != TARGET_HALTED)
 775         {
 776                 LOG_ERROR("Target not halted");
 777                 return ERROR_TARGET_NOT_HALTED;
 778         }
 779
 780         return lpc2000_iap_blank_check(bank, 0, bank->num_sectors - 1);
 781 }
 782
 783 static int lpc2000_protect_check(struct flash_bank *bank)
 784 {
 785         /* sectors are always protected */
 786         return ERROR_OK;
 787 }
 788
 789 static int get_lpc2000_info(struct flash_bank *bank, char *buf, int buf_size)
 790 {
 791         struct lpc2000_flash_bank *lpc2000_info = bank->driver_priv;
 792
 793         snprintf(buf, buf_size, "lpc2000 flash driver variant: %i, clk: %" PRIi32 "kHz" , lpc2000_info->variant, lpc2000_info->cclk);
 794
 795         return ERROR_OK;
 796 }
 797
 798 COMMAND_HANDLER(lpc2000_handle_part_id_command)
 799 {
 800         uint32_t param_table[5];
 801         uint32_t result_table[4];
 802         int status_code;
 803
 804         if (CMD_ARGC < 1)
 805         {
 806                 return ERROR_COMMAND_SYNTAX_ERROR;
 807         }
 808
 809         struct flash_bank *bank;
 810         int retval = CALL_COMMAND_HANDLER(flash_command_get_bank, 0, &bank);
 811         if (ERROR_OK != retval)
 812                 return retval;
 813
 814         if (bank->target->state != TARGET_HALTED)
 815         {
 816                 LOG_ERROR("Target not halted");
 817                 return ERROR_TARGET_NOT_HALTED;
 818         }
 819
 820         if ((status_code = lpc2000_iap_call(bank, 54, param_table, result_table)) != 0x0)
 821         {
 822                 if (status_code == ERROR_FLASH_OPERATION_FAILED)
 823                 {
 824                         command_print(CMD_CTX, "no sufficient working area specified, can't access LPC2000 IAP interface");
 825                         return ERROR_OK;
 826                 }
 827                 command_print(CMD_CTX, "lpc2000 IAP returned status code %i", status_code);
 828         }
 829         else
 830         {
 831                 command_print(CMD_CTX, "lpc2000 part id: 0x%8.8" PRIx32 , result_table[0]);
 832         }
 833
 834         return ERROR_OK;
 835 }
 836
 837 static const struct command_registration lpc2000_exec_command_handlers[] = {
 838         {
 839                 .name = "part_id",
 840                 .handler = lpc2000_handle_part_id_command,
 841                 .mode = COMMAND_EXEC,
 842                 .help = "print part id of lpc2000 flash bank <num>",
 843         },
 844         COMMAND_REGISTRATION_DONE
 845 };
 846 static const struct command_registration lpc2000_command_handlers[] = {
 847         {
 848                 .name = "lpc2000",
 849                 .mode = COMMAND_ANY,
 850                 .help = "lpc2000 flash command group",
 851                 .chain = lpc2000_exec_command_handlers,
 852         },
 853         COMMAND_REGISTRATION_DONE
 854 };
 855
 856 struct flash_driver lpc2000_flash = {
 857         .name = "lpc2000",
 858         .commands = lpc2000_command_handlers,
 859         .flash_bank_command = lpc2000_flash_bank_command,
 860         .erase = lpc2000_erase,
 861         .protect = lpc2000_protect,
 862         .write = lpc2000_write,
 863         .read = default_flash_read,
 864         .probe = lpc2000_probe,
 865         .auto_probe = lpc2000_probe,
 866         .erase_check = lpc2000_erase_check,
 867         .protect_check = lpc2000_protect_check,
 868         .info = get_lpc2000_info,
 869 };