git.sur5r.net Git - openocd/blob - src/flash/str9x.c

   1 /***************************************************************************
   2  *   Copyright (C) 2005 by Dominic Rath                                    *
   3  *   Dominic.Rath@gmx.de                                                   *
   4  *                                                                         *
   5  *   Copyright (C) 2008 by Spencer Oliver                                  *
   6  *   spen@spen-soft.co.uk                                                  *
   7  *
   8  *   Copyright (C) 2008 by Oyvind Harboe                                   *
   9  *   oyvind.harboe@zylin.com                                               *
  10  *                                                                         *
  11  *   This program is free software; you can redistribute it and/or modify  *
  12  *   it under the terms of the GNU General Public License as published by  *
  13  *   the Free Software Foundation; either version 2 of the License, or     *
  14  *   (at your option) any later version.                                   *
  15  *                                                                         *
  16  *   This program is distributed in the hope that it will be useful,       *
  17  *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
  18  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
  19  *   GNU General Public License for more details.                          *
  20  *                                                                         *
  21  *   You should have received a copy of the GNU General Public License     *
  22  *   along with this program; if not, write to the                         *
  23  *   Free Software Foundation, Inc.,                                       *
  24  *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             *
  25  ***************************************************************************/
  26 #ifdef HAVE_CONFIG_H
  27 #include "config.h"
  28 #endif
  29
  30 #include "str9x.h"
  31 #include "arm966e.h"
  32
  33
  34 static u32 bank1start = 0x00080000;
  35
  36 static int str9x_register_commands(struct command_context_s *cmd_ctx);
  37 static int str9x_flash_bank_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc, struct flash_bank_s *bank);
  38 static int str9x_erase(struct flash_bank_s *bank, int first, int last);
  39 static int str9x_protect(struct flash_bank_s *bank, int set, int first, int last);
  40 static int str9x_write(struct flash_bank_s *bank, u8 *buffer, u32 offset, u32 count);
  41 static int str9x_probe(struct flash_bank_s *bank);
  42 //static int str9x_handle_part_id_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
  43 static int str9x_protect_check(struct flash_bank_s *bank);
  44 static int str9x_info(struct flash_bank_s *bank, char *buf, int buf_size);
  45
  46 static int str9x_handle_flash_config_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
  47
  48 flash_driver_t str9x_flash =
  49 {
  50         .name = "str9x",
  51         .register_commands = str9x_register_commands,
  52         .flash_bank_command = str9x_flash_bank_command,
  53         .erase = str9x_erase,
  54         .protect = str9x_protect,
  55         .write = str9x_write,
  56         .probe = str9x_probe,
  57         .auto_probe = str9x_probe,
  58         .erase_check = default_flash_blank_check,
  59         .protect_check = str9x_protect_check,
  60         .info = str9x_info
  61 };
  62
  63 static int str9x_register_commands(struct command_context_s *cmd_ctx)
  64 {
  65         command_t *str9x_cmd = register_command(cmd_ctx, NULL, "str9x", NULL, COMMAND_ANY, NULL);
  66
  67         register_command(cmd_ctx, str9x_cmd, "flash_config", str9x_handle_flash_config_command, COMMAND_EXEC,
  68                                          "configure str9 flash controller");
  69
  70         return ERROR_OK;
  71 }
  72
  73 static int str9x_build_block_list(struct flash_bank_s *bank)
  74 {
  75         str9x_flash_bank_t *str9x_info = bank->driver_priv;
  76
  77         int i;
  78         int num_sectors;
  79         int b0_sectors = 0, b1_sectors = 0;
  80         u32 offset = 0;
  81
  82         /* set if we have large flash str9 */
  83         str9x_info->variant = 0;
  84         str9x_info->bank1 = 0;
  85
  86         switch (bank->size)
  87         {
  88                 case (256 * 1024):
  89                         b0_sectors = 4;
  90                         break;
  91                 case (512 * 1024):
  92                         b0_sectors = 8;
  93                         break;
  94                 case (1024 * 1024):
  95                         bank1start = 0x00100000;
  96                         str9x_info->variant = 1;
  97                         b0_sectors = 16;
  98                         break;
  99                 case (2048 * 1024):
 100                         bank1start = 0x00200000;
 101                         str9x_info->variant = 1;
 102                         b0_sectors = 32;
 103                         break;
 104                 case (128 * 1024):
 105                         str9x_info->variant = 1;
 106                         str9x_info->bank1 = 1;
 107                         b1_sectors = 8;
 108                         bank1start = bank->base;
 109                         break;
 110                 case (32 * 1024):
 111                         str9x_info->bank1 = 1;
 112                         b1_sectors = 4;
 113                         bank1start = bank->base;
 114                         break;
 115                 default:
 116                         LOG_ERROR("BUG: unknown bank->size encountered");
 117                         exit(-1);
 118         }
 119
 120         num_sectors = b0_sectors + b1_sectors;
 121
 122         bank->num_sectors = num_sectors;
 123         bank->sectors = malloc(sizeof(flash_sector_t) * num_sectors);
 124         str9x_info->sector_bits = malloc(sizeof(u32) * num_sectors);
 125
 126         num_sectors = 0;
 127
 128         for (i = 0; i < b0_sectors; i++)
 129         {
 130                 bank->sectors[num_sectors].offset = offset;
 131                 bank->sectors[num_sectors].size = 0x10000;
 132                 offset += bank->sectors[i].size;
 133                 bank->sectors[num_sectors].is_erased = -1;
 134                 bank->sectors[num_sectors].is_protected = 1;
 135                 str9x_info->sector_bits[num_sectors++] = (1<<i);
 136         }
 137
 138         for (i = 0; i < b1_sectors; i++)
 139         {
 140                 bank->sectors[num_sectors].offset = offset;
 141                 bank->sectors[num_sectors].size = str9x_info->variant == 0 ? 0x2000 : 0x4000;
 142                 offset += bank->sectors[i].size;
 143                 bank->sectors[num_sectors].is_erased = -1;
 144                 bank->sectors[num_sectors].is_protected = 1;
 145                 if (str9x_info->variant)
 146                         str9x_info->sector_bits[num_sectors++] = (1<<i);
 147                 else
 148                         str9x_info->sector_bits[num_sectors++] = (1<<(i+8));
 149         }
 150
 151         return ERROR_OK;
 152 }
 153
 154 /* flash bank str9x <base> <size> 0 0 <target#>
 155  */
 156 static int str9x_flash_bank_command(struct command_context_s *cmd_ctx,
 157                 char *cmd, char **args, int argc, struct flash_bank_s *bank)
 158 {
 159         str9x_flash_bank_t *str9x_info;
 160
 161         if (argc < 6)
 162         {
 163                 LOG_WARNING("incomplete flash_bank str9x configuration");
 164                 return ERROR_FLASH_BANK_INVALID;
 165         }
 166
 167         str9x_info = malloc(sizeof(str9x_flash_bank_t));
 168         bank->driver_priv = str9x_info;
 169
 170         str9x_build_block_list(bank);
 171
 172         str9x_info->write_algorithm = NULL;
 173
 174         return ERROR_OK;
 175 }
 176
 177 static int str9x_protect_check(struct flash_bank_s *bank)
 178 {
 179         int retval;
 180         str9x_flash_bank_t *str9x_info = bank->driver_priv;
 181         target_t *target = bank->target;
 182
 183         int i;
 184         u32 adr;
 185         u32 status = 0;
 186         u16 hstatus = 0;
 187
 188         if (bank->target->state != TARGET_HALTED)
 189         {
 190                 LOG_ERROR("Target not halted");
 191                 return ERROR_TARGET_NOT_HALTED;
 192         }
 193
 194         /* read level one protection */
 195
 196         if (str9x_info->variant)
 197         {
 198                 if (str9x_info->bank1)
 199                 {
 200                         adr = bank1start + 0x18;
 201                         if ((retval=target_write_u16(target, adr, 0x90))!=ERROR_OK)
 202                         {
 203                                 return retval;
 204                         }
 205                         if ((retval=target_read_u16(target, adr, &hstatus))!=ERROR_OK)
 206                         {
 207                                 return retval;
 208                         }
 209                         status = hstatus;
 210                 }
 211                 else
 212                 {
 213                         adr = bank1start + 0x14;
 214                         if ((retval=target_write_u16(target, adr, 0x90))!=ERROR_OK)
 215                         {
 216                                 return retval;
 217                         }
 218                         if ((retval=target_read_u32(target, adr, &status))!=ERROR_OK)
 219                         {
 220                                 return retval;
 221                         }
 222                 }
 223         }
 224         else
 225         {
 226                 adr = bank1start + 0x10;
 227                 if ((retval=target_write_u16(target, adr, 0x90))!=ERROR_OK)
 228                 {
 229                         return retval;
 230                 }
 231                 if ((retval=target_read_u16(target, adr, &hstatus))!=ERROR_OK)
 232                 {
 233                         return retval;
 234                 }
 235                 status = hstatus;
 236         }
 237
 238         /* read array command */
 239         if ((retval=target_write_u16(target, adr, 0xFF))!=ERROR_OK)
 240         {
 241                 return retval;
 242         }
 243
 244         for (i = 0; i < bank->num_sectors; i++)
 245         {
 246                 if (status & str9x_info->sector_bits[i])
 247                         bank->sectors[i].is_protected = 1;
 248                 else
 249                         bank->sectors[i].is_protected = 0;
 250         }
 251
 252         return ERROR_OK;
 253 }
 254
 255 static int str9x_erase(struct flash_bank_s *bank, int first, int last)
 256 {
 257         target_t *target = bank->target;
 258         int i;
 259         u32 adr;
 260         u8 status;
 261         u8 erase_cmd;
 262
 263         if (bank->target->state != TARGET_HALTED)
 264         {
 265                 LOG_ERROR("Target not halted");
 266                 return ERROR_TARGET_NOT_HALTED;
 267         }
 268
 269         /* Check if we erase whole bank */
 270         if ((first == 0) && (last == (bank->num_sectors - 1)))
 271         {
 272                 /* Optimize to run erase bank command instead of sector */
 273                 erase_cmd = 0x80;
 274         }
 275         else
 276         {
 277                 /* Erase sector command */
 278                 erase_cmd = 0x20;
 279         }
 280
 281         for (i = first; i <= last; i++)
 282         {
 283                 int retval;
 284                 adr = bank->base + bank->sectors[i].offset;
 285
 286                 /* erase sectors */
 287                 if ((retval=target_write_u16(target, adr, erase_cmd))!=ERROR_OK)
 288                 {
 289                         return retval;
 290                 }
 291                 if ((retval=target_write_u16(target, adr, 0xD0))!=ERROR_OK)
 292                 {
 293                         return retval;
 294                 }
 295
 296                 /* get status */
 297                 if ((retval=target_write_u16(target, adr, 0x70))!=ERROR_OK)
 298                 {
 299                         return retval;
 300                 }
 301
 302                 int timeout;
 303                 for (timeout=0; timeout<1000; timeout++) {
 304                         if ((retval=target_read_u8(target, adr, &status))!=ERROR_OK)
 305                         {
 306                                 return retval;
 307                         }
 308                         if( status & 0x80 )
 309                                 break;
 310                         alive_sleep(1);
 311                 }
 312                 if (timeout==1000)
 313                 {
 314                         LOG_ERROR("erase timed out");
 315                         return ERROR_FAIL;
 316                 }
 317
 318                 /* clear status, also clear read array */
 319                 if ((retval=target_write_u16(target, adr, 0x50))!=ERROR_OK)
 320                 {
 321                         return retval;
 322                 }
 323
 324                 /* read array command */
 325                 if ((retval=target_write_u16(target, adr, 0xFF))!=ERROR_OK)
 326                 {
 327                         return retval;
 328                 }
 329
 330                 if( status & 0x22 )
 331                 {
 332                         LOG_ERROR("error erasing flash bank, status: 0x%x", status);
 333                         return ERROR_FLASH_OPERATION_FAILED;
 334                 }
 335
 336                 /* If we ran erase bank command, we are finished */
 337                 if (erase_cmd == 0x80)
 338                         break;
 339         }
 340
 341         for (i = first; i <= last; i++)
 342                 bank->sectors[i].is_erased = 1;
 343
 344         return ERROR_OK;
 345 }
 346
 347 static int str9x_protect(struct flash_bank_s *bank,
 348                 int set, int first, int last)
 349 {
 350         target_t *target = bank->target;
 351         int i;
 352         u32 adr;
 353         u8 status;
 354
 355         if (bank->target->state != TARGET_HALTED)
 356         {
 357                 LOG_ERROR("Target not halted");
 358                 return ERROR_TARGET_NOT_HALTED;
 359         }
 360
 361         for (i = first; i <= last; i++)
 362         {
 363                 /* Level One Protection */
 364
 365                 adr = bank->base + bank->sectors[i].offset;
 366
 367                 target_write_u16(target, adr, 0x60);
 368                 if( set )
 369                         target_write_u16(target, adr, 0x01);
 370                 else
 371                         target_write_u16(target, adr, 0xD0);
 372
 373                 /* query status */
 374                 target_read_u8(target, adr, &status);
 375
 376                 /* clear status, also clear read array */
 377                 target_write_u16(target, adr, 0x50);
 378
 379                 /* read array command */
 380                 target_write_u16(target, adr, 0xFF);
 381         }
 382
 383         return ERROR_OK;
 384 }
 385
 386 static int str9x_write_block(struct flash_bank_s *bank,
 387                 u8 *buffer, u32 offset, u32 count)
 388 {
 389         str9x_flash_bank_t *str9x_info = bank->driver_priv;
 390         target_t *target = bank->target;
 391         u32 buffer_size = 8192;
 392         working_area_t *source;
 393         u32 address = bank->base + offset;
 394         reg_param_t reg_params[4];
 395         armv4_5_algorithm_t armv4_5_info;
 396         int retval = ERROR_OK;
 397
 398         u32 str9x_flash_write_code[] = {
 399                                         /* write:                               */
 400                 0xe3c14003,     /*      bic     r4, r1, #3              */
 401                 0xe3a03040,     /*      mov     r3, #0x40               */
 402                 0xe1c430b0,     /*      strh r3, [r4, #0]       */
 403                 0xe0d030b2,     /*      ldrh r3, [r0], #2       */
 404                 0xe0c130b2,     /*      strh r3, [r1], #2       */
 405                 0xe3a03070,     /*      mov r3, #0x70           */
 406                 0xe1c430b0,     /*      strh r3, [r4, #0]       */
 407                                         /* busy:                                */
 408                 0xe5d43000,     /*      ldrb r3, [r4, #0]       */
 409                 0xe3130080,     /*      tst r3, #0x80           */
 410                 0x0afffffc,     /*      beq busy                        */
 411                 0xe3a05050,     /*      mov     r5, #0x50               */
 412                 0xe1c450b0,     /*      strh r5, [r4, #0]       */
 413                 0xe3a050ff,     /*      mov     r5, #0xFF               */
 414                 0xe1c450b0,     /*      strh r5, [r4, #0]       */
 415                 0xe3130012,     /*      tst     r3, #0x12               */
 416                 0x1a000001,     /*      bne exit                        */
 417                 0xe2522001,     /*      subs r2, r2, #1         */
 418                 0x1affffed,     /*      bne write                       */
 419                                         /* exit:                                */
 420                 0xeafffffe,     /*      b exit                          */
 421         };
 422
 423         /* flash write code */
 424         if (target_alloc_working_area(target, 4 * 19, &str9x_info->write_algorithm) != ERROR_OK)
 425         {
 426                 LOG_WARNING("no working area available, can't do block memory writes");
 427                 return ERROR_TARGET_RESOURCE_NOT_AVAILABLE;
 428         };
 429
 430         target_write_buffer(target, str9x_info->write_algorithm->address, 19 * 4, (u8*)str9x_flash_write_code);
 431
 432         /* memory buffer */
 433         while (target_alloc_working_area(target, buffer_size, &source) != ERROR_OK)
 434         {
 435                 buffer_size /= 2;
 436                 if (buffer_size <= 256)
 437                 {
 438                         /* if we already allocated the writing code, but failed to get a buffer, free the algorithm */
 439                         if (str9x_info->write_algorithm)
 440                                 target_free_working_area(target, str9x_info->write_algorithm);
 441
 442                         LOG_WARNING("no large enough working area available, can't do block memory writes");
 443                         return ERROR_TARGET_RESOURCE_NOT_AVAILABLE;
 444                 }
 445         }
 446
 447         armv4_5_info.common_magic = ARMV4_5_COMMON_MAGIC;
 448         armv4_5_info.core_mode = ARMV4_5_MODE_SVC;
 449         armv4_5_info.core_state = ARMV4_5_STATE_ARM;
 450
 451         init_reg_param(&reg_params[0], "r0", 32, PARAM_OUT);
 452         init_reg_param(&reg_params[1], "r1", 32, PARAM_OUT);
 453         init_reg_param(&reg_params[2], "r2", 32, PARAM_OUT);
 454         init_reg_param(&reg_params[3], "r3", 32, PARAM_IN);
 455
 456         while (count > 0)
 457         {
 458                 u32 thisrun_count = (count > (buffer_size / 2)) ? (buffer_size / 2) : count;
 459
 460                 target_write_buffer(target, source->address, thisrun_count * 2, buffer);
 461
 462                 buf_set_u32(reg_params[0].value, 0, 32, source->address);
 463                 buf_set_u32(reg_params[1].value, 0, 32, address);
 464                 buf_set_u32(reg_params[2].value, 0, 32, thisrun_count);
 465
 466                 if ((retval = target_run_algorithm(target, 0, NULL, 4, reg_params, str9x_info->write_algorithm->address, str9x_info->write_algorithm->address + (18 * 4), 10000, &armv4_5_info)) != ERROR_OK)
 467                 {
 468                         LOG_ERROR("error executing str9x flash write algorithm");
 469                         retval = ERROR_FLASH_OPERATION_FAILED;
 470                         break;
 471                 }
 472
 473                 if (buf_get_u32(reg_params[3].value, 0, 32) != 0x80)
 474                 {
 475                         retval = ERROR_FLASH_OPERATION_FAILED;
 476                         break;
 477                 }
 478
 479                 buffer += thisrun_count * 2;
 480                 address += thisrun_count * 2;
 481                 count -= thisrun_count;
 482         }
 483
 484         target_free_working_area(target, source);
 485         target_free_working_area(target, str9x_info->write_algorithm);
 486
 487         destroy_reg_param(&reg_params[0]);
 488         destroy_reg_param(&reg_params[1]);
 489         destroy_reg_param(&reg_params[2]);
 490         destroy_reg_param(&reg_params[3]);
 491
 492         return retval;
 493 }
 494
 495 static int str9x_write(struct flash_bank_s *bank,
 496                 u8 *buffer, u32 offset, u32 count)
 497 {
 498         target_t *target = bank->target;
 499         u32 words_remaining = (count / 2);
 500         u32 bytes_remaining = (count & 0x00000001);
 501         u32 address = bank->base + offset;
 502         u32 bytes_written = 0;
 503         u8 status;
 504         int retval;
 505         u32 check_address = offset;
 506         u32 bank_adr;
 507         int i;
 508
 509         if (bank->target->state != TARGET_HALTED)
 510         {
 511                 LOG_ERROR("Target not halted");
 512                 return ERROR_TARGET_NOT_HALTED;
 513         }
 514
 515         if (offset & 0x1)
 516         {
 517                 LOG_WARNING("offset 0x%x breaks required 2-byte alignment", offset);
 518                 return ERROR_FLASH_DST_BREAKS_ALIGNMENT;
 519         }
 520
 521         for (i = 0; i < bank->num_sectors; i++)
 522         {
 523                 u32 sec_start = bank->sectors[i].offset;
 524                 u32 sec_end = sec_start + bank->sectors[i].size;
 525
 526                 /* check if destination falls within the current sector */
 527                 if ((check_address >= sec_start) && (check_address < sec_end))
 528                 {
 529                         /* check if destination ends in the current sector */
 530                         if (offset + count < sec_end)
 531                                 check_address = offset + count;
 532                         else
 533                                 check_address = sec_end;
 534                 }
 535         }
 536
 537         if (check_address != offset + count)
 538                 return ERROR_FLASH_DST_OUT_OF_BANK;
 539
 540         /* multiple half words (2-byte) to be programmed? */
 541         if (words_remaining > 0)
 542         {
 543                 /* try using a block write */
 544                 if ((retval = str9x_write_block(bank, buffer, offset, words_remaining)) != ERROR_OK)
 545                 {
 546                         if (retval == ERROR_TARGET_RESOURCE_NOT_AVAILABLE)
 547                         {
 548                                 /* if block write failed (no sufficient working area),
 549                                  * we use normal (slow) single dword accesses */
 550                                 LOG_WARNING("couldn't use block writes, falling back to single memory accesses");
 551                         }
 552                         else if (retval == ERROR_FLASH_OPERATION_FAILED)
 553                         {
 554                                 LOG_ERROR("flash writing failed with error code: 0x%x", retval);
 555                                 return ERROR_FLASH_OPERATION_FAILED;
 556                         }
 557                 }
 558                 else
 559                 {
 560                         buffer += words_remaining * 2;
 561                         address += words_remaining * 2;
 562                         words_remaining = 0;
 563                 }
 564         }
 565
 566         while (words_remaining > 0)
 567         {
 568                 bank_adr = address & ~0x03;
 569
 570                 /* write data command */
 571                 target_write_u16(target, bank_adr, 0x40);
 572                 target_write_memory(target, address, 2, 1, buffer + bytes_written);
 573
 574                 /* get status command */
 575                 target_write_u16(target, bank_adr, 0x70);
 576
 577                 int timeout;
 578                 for (timeout=0; timeout<1000; timeout++)
 579                 {
 580                         target_read_u8(target, bank_adr, &status);
 581                         if( status & 0x80 )
 582                                 break;
 583                         alive_sleep(1);
 584                 }
 585                 if (timeout==1000)
 586                 {
 587                         LOG_ERROR("write timed out");
 588                         return ERROR_FAIL;
 589                 }
 590
 591                 /* clear status reg and read array */
 592                 target_write_u16(target, bank_adr, 0x50);
 593                 target_write_u16(target, bank_adr, 0xFF);
 594
 595                 if (status & 0x10)
 596                         return ERROR_FLASH_OPERATION_FAILED;
 597                 else if (status & 0x02)
 598                         return ERROR_FLASH_OPERATION_FAILED;
 599
 600                 bytes_written += 2;
 601                 words_remaining--;
 602                 address += 2;
 603         }
 604
 605         if (bytes_remaining)
 606         {
 607                 u8 last_halfword[2] = {0xff, 0xff};
 608                 int i = 0;
 609
 610                 while(bytes_remaining > 0)
 611                 {
 612                         last_halfword[i++] = *(buffer + bytes_written);
 613                         bytes_remaining--;
 614                         bytes_written++;
 615                 }
 616
 617                 bank_adr = address & ~0x03;
 618
 619                 /* write data command */
 620                 target_write_u16(target, bank_adr, 0x40);
 621                 target_write_memory(target, address, 2, 1, last_halfword);
 622
 623                 /* query status command */
 624                 target_write_u16(target, bank_adr, 0x70);
 625
 626                 int timeout;
 627                 for (timeout=0; timeout<1000; timeout++)
 628                 {
 629                         target_read_u8(target, bank_adr, &status);
 630                         if( status & 0x80 )
 631                                 break;
 632                         alive_sleep(1);
 633                 }
 634                 if (timeout==1000)
 635                 {
 636                         LOG_ERROR("write timed out");
 637                         return ERROR_FAIL;
 638                 }
 639
 640                 /* clear status reg and read array */
 641                 target_write_u16(target, bank_adr, 0x50);
 642                 target_write_u16(target, bank_adr, 0xFF);
 643
 644                 if (status & 0x10)
 645                         return ERROR_FLASH_OPERATION_FAILED;
 646                 else if (status & 0x02)
 647                         return ERROR_FLASH_OPERATION_FAILED;
 648         }
 649
 650         return ERROR_OK;
 651 }
 652
 653 static int str9x_probe(struct flash_bank_s *bank)
 654 {
 655         return ERROR_OK;
 656 }
 657
 658 #if 0
 659 static int str9x_handle_part_id_command(struct command_context_s *cmd_ctx,
 660                 char *cmd, char **args, int argc)
 661 {
 662         return ERROR_OK;
 663 }
 664 #endif
 665
 666 static int str9x_info(struct flash_bank_s *bank, char *buf, int buf_size)
 667 {
 668         snprintf(buf, buf_size, "str9x flash driver info" );
 669         return ERROR_OK;
 670 }
 671
 672 static int str9x_handle_flash_config_command(struct command_context_s *cmd_ctx,
 673                 char *cmd, char **args, int argc)
 674 {
 675         str9x_flash_bank_t *str9x_info;
 676         flash_bank_t *bank;
 677         target_t *target = NULL;
 678
 679         if (argc < 5)
 680         {
 681                 return ERROR_COMMAND_SYNTAX_ERROR;
 682         }
 683
 684         bank = get_flash_bank_by_num(strtoul(args[0], NULL, 0));
 685         if (!bank)
 686         {
 687                 command_print(cmd_ctx, "flash bank '#%s' is out of bounds", args[0]);
 688                 return ERROR_OK;
 689         }
 690
 691         str9x_info = bank->driver_priv;
 692
 693         target = bank->target;
 694
 695         if (bank->target->state != TARGET_HALTED)
 696         {
 697                 LOG_ERROR("Target not halted");
 698                 return ERROR_TARGET_NOT_HALTED;
 699         }
 700
 701         /* config flash controller */
 702         target_write_u32(target, FLASH_BBSR, strtoul(args[1], NULL, 0));
 703         target_write_u32(target, FLASH_NBBSR, strtoul(args[2], NULL, 0));
 704         target_write_u32(target, FLASH_BBADR, (strtoul(args[3], NULL, 0) >> 2));
 705         target_write_u32(target, FLASH_NBBADR, (strtoul(args[4], NULL, 0) >> 2));
 706
 707         /* set bit 18 instruction TCM order as per flash programming manual */
 708         arm966e_write_cp15(target, 62, 0x40000);
 709
 710         /* enable flash bank 1 */
 711         target_write_u32(target, FLASH_CR, 0x18);
 712         return ERROR_OK;
 713 }