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   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  *   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 #ifdef HAVE_CONFIG_H
  24 #include "config.h"
  25 #endif
  26
  27 #include "imp.h"
  28 #include "str7x.h"
  29 #include <target/arm.h>
  30 #include <helper/binarybuffer.h>
  31 #include <target/algorithm.h>
  32
  33
  34 static struct str7x_mem_layout mem_layout_str7bank0[] = {
  35         {0x00000000, 0x02000, 0x01},
  36         {0x00002000, 0x02000, 0x02},
  37         {0x00004000, 0x02000, 0x04},
  38         {0x00006000, 0x02000, 0x08},
  39         {0x00008000, 0x08000, 0x10},
  40         {0x00010000, 0x10000, 0x20},
  41         {0x00020000, 0x10000, 0x40},
  42         {0x00030000, 0x10000, 0x80}
  43 };
  44
  45 static struct str7x_mem_layout mem_layout_str7bank1[] = {
  46         {0x00000000, 0x02000, 0x10000},
  47         {0x00002000, 0x02000, 0x20000}
  48 };
  49
  50 static int str7x_get_flash_adr(struct flash_bank *bank, uint32_t reg)
  51 {
  52         struct str7x_flash_bank *str7x_info = bank->driver_priv;
  53         return (str7x_info->register_base | reg);
  54 }
  55
  56 static int str7x_build_block_list(struct flash_bank *bank)
  57 {
  58         struct str7x_flash_bank *str7x_info = bank->driver_priv;
  59
  60         int i;
  61         int num_sectors;
  62         int b0_sectors = 0, b1_sectors = 0;
  63
  64         switch (bank->size)
  65         {
  66                 case 16 * 1024:
  67                         b1_sectors = 2;
  68                         break;
  69                 case 64 * 1024:
  70                         b0_sectors = 5;
  71                         break;
  72                 case 128 * 1024:
  73                         b0_sectors = 6;
  74                         break;
  75                 case 256 * 1024:
  76                         b0_sectors = 8;
  77                         break;
  78                 default:
  79                         LOG_ERROR("BUG: unknown bank->size encountered");
  80                         exit(-1);
  81         }
  82
  83         num_sectors = b0_sectors + b1_sectors;
  84
  85         bank->num_sectors = num_sectors;
  86         bank->sectors = malloc(sizeof(struct flash_sector) * num_sectors);
  87         str7x_info->sector_bits = malloc(sizeof(uint32_t) * num_sectors);
  88
  89         num_sectors = 0;
  90
  91         for (i = 0; i < b0_sectors; i++)
  92         {
  93                 bank->sectors[num_sectors].offset = mem_layout_str7bank0[i].sector_start;
  94                 bank->sectors[num_sectors].size = mem_layout_str7bank0[i].sector_size;
  95                 bank->sectors[num_sectors].is_erased = -1;
  96                 /* the reset_init handler marks all the sectors unprotected,
  97                  * matching hardware after reset; keep the driver in sync
  98                  */
  99                 bank->sectors[num_sectors].is_protected = 0;
 100                 str7x_info->sector_bits[num_sectors++] = mem_layout_str7bank0[i].sector_bit;
 101         }
 102
 103         for (i = 0; i < b1_sectors; i++)
 104         {
 105                 bank->sectors[num_sectors].offset = mem_layout_str7bank1[i].sector_start;
 106                 bank->sectors[num_sectors].size = mem_layout_str7bank1[i].sector_size;
 107                 bank->sectors[num_sectors].is_erased = -1;
 108                 /* the reset_init handler marks all the sectors unprotected,
 109                  * matching hardware after reset; keep the driver in sync
 110                  */
 111                 bank->sectors[num_sectors].is_protected = 0;
 112                 str7x_info->sector_bits[num_sectors++] = mem_layout_str7bank1[i].sector_bit;
 113         }
 114
 115         return ERROR_OK;
 116 }
 117
 118 /* flash bank str7x <base> <size> 0 0 <target#> <str71_variant>
 119  */
 120 FLASH_BANK_COMMAND_HANDLER(str7x_flash_bank_command)
 121 {
 122         struct str7x_flash_bank *str7x_info;
 123
 124         if (CMD_ARGC < 7)
 125         {
 126                 LOG_WARNING("incomplete flash_bank str7x configuration");
 127                 return ERROR_FLASH_BANK_INVALID;
 128         }
 129
 130         str7x_info = malloc(sizeof(struct str7x_flash_bank));
 131         bank->driver_priv = str7x_info;
 132
 133         /* set default bits for str71x flash */
 134         str7x_info->busy_bits = (FLASH_LOCK | FLASH_BSYA1 | FLASH_BSYA0);
 135         str7x_info->disable_bit = (1 << 1);
 136
 137         if (strcmp(CMD_ARGV[6], "STR71x") == 0)
 138         {
 139                 str7x_info->register_base = 0x40100000;
 140         }
 141         else if (strcmp(CMD_ARGV[6], "STR73x") == 0)
 142         {
 143                 str7x_info->register_base = 0x80100000;
 144                 str7x_info->busy_bits = (FLASH_LOCK | FLASH_BSYA0);
 145         }
 146         else if (strcmp(CMD_ARGV[6], "STR75x") == 0)
 147         {
 148                 str7x_info->register_base = 0x20100000;
 149                 str7x_info->disable_bit = (1 << 0);
 150         }
 151         else
 152         {
 153                 LOG_ERROR("unknown STR7x variant: '%s'", CMD_ARGV[6]);
 154                 free(str7x_info);
 155                 return ERROR_FLASH_BANK_INVALID;
 156         }
 157
 158         str7x_build_block_list(bank);
 159
 160         str7x_info->write_algorithm = NULL;
 161
 162         return ERROR_OK;
 163 }
 164
 165 static uint32_t str7x_status(struct flash_bank *bank)
 166 {
 167         struct target *target = bank->target;
 168         uint32_t retval;
 169
 170         target_read_u32(target, str7x_get_flash_adr(bank, FLASH_CR0), &retval);
 171
 172         return retval;
 173 }
 174
 175 static uint32_t str7x_result(struct flash_bank *bank)
 176 {
 177         struct target *target = bank->target;
 178         uint32_t retval;
 179
 180         target_read_u32(target, str7x_get_flash_adr(bank, FLASH_ER), &retval);
 181
 182         return retval;
 183 }
 184
 185 static int str7x_protect_check(struct flash_bank *bank)
 186 {
 187         struct str7x_flash_bank *str7x_info = bank->driver_priv;
 188         struct target *target = bank->target;
 189
 190         int i;
 191         uint32_t retval;
 192
 193         if (bank->target->state != TARGET_HALTED)
 194         {
 195                 LOG_ERROR("Target not halted");
 196                 return ERROR_TARGET_NOT_HALTED;
 197         }
 198
 199         target_read_u32(target, str7x_get_flash_adr(bank, FLASH_NVWPAR), &retval);
 200
 201         for (i = 0; i < bank->num_sectors; i++)
 202         {
 203                 if (retval & str7x_info->sector_bits[i])
 204                         bank->sectors[i].is_protected = 0;
 205                 else
 206                         bank->sectors[i].is_protected = 1;
 207         }
 208
 209         return ERROR_OK;
 210 }
 211
 212 static int str7x_erase(struct flash_bank *bank, int first, int last)
 213 {
 214         struct str7x_flash_bank *str7x_info = bank->driver_priv;
 215         struct target *target = bank->target;
 216
 217         int i;
 218         uint32_t cmd;
 219         uint32_t retval;
 220         uint32_t sectors = 0;
 221
 222         if (bank->target->state != TARGET_HALTED)
 223         {
 224                 LOG_ERROR("Target not halted");
 225                 return ERROR_TARGET_NOT_HALTED;
 226         }
 227
 228         for (i = first; i <= last; i++)
 229         {
 230                 sectors |= str7x_info->sector_bits[i];
 231         }
 232
 233         LOG_DEBUG("sectors: 0x%" PRIx32 "", sectors);
 234
 235         /* clear FLASH_ER register */
 236         target_write_u32(target, str7x_get_flash_adr(bank, FLASH_ER), 0x0);
 237
 238         cmd = FLASH_SER;
 239         target_write_u32(target, str7x_get_flash_adr(bank, FLASH_CR0), cmd);
 240
 241         cmd = sectors;
 242         target_write_u32(target, str7x_get_flash_adr(bank, FLASH_CR1), cmd);
 243
 244         cmd = FLASH_SER | FLASH_WMS;
 245         target_write_u32(target, str7x_get_flash_adr(bank, FLASH_CR0), cmd);
 246
 247         while (((retval = str7x_status(bank)) & str7x_info->busy_bits)) {
 248                 alive_sleep(1);
 249         }
 250
 251         retval = str7x_result(bank);
 252
 253         if (retval)
 254         {
 255                 LOG_ERROR("error erasing flash bank, FLASH_ER: 0x%" PRIx32 "", retval);
 256                 return ERROR_FLASH_OPERATION_FAILED;
 257         }
 258
 259         for (i = first; i <= last; i++)
 260                 bank->sectors[i].is_erased = 1;
 261
 262         return ERROR_OK;
 263 }
 264
 265 static int str7x_protect(struct flash_bank *bank, int set, int first, int last)
 266 {
 267         struct str7x_flash_bank *str7x_info = bank->driver_priv;
 268         struct target *target = bank->target;
 269         int i;
 270         uint32_t cmd;
 271         uint32_t retval;
 272         uint32_t protect_blocks;
 273
 274         if (bank->target->state != TARGET_HALTED)
 275         {
 276                 LOG_ERROR("Target not halted");
 277                 return ERROR_TARGET_NOT_HALTED;
 278         }
 279
 280         protect_blocks = 0xFFFFFFFF;
 281
 282         if (set)
 283         {
 284                 for (i = first; i <= last; i++)
 285                         protect_blocks &= ~(str7x_info->sector_bits[i]);
 286         }
 287
 288         /* clear FLASH_ER register */
 289         target_write_u32(target, str7x_get_flash_adr(bank, FLASH_ER), 0x0);
 290
 291         cmd = FLASH_SPR;
 292         target_write_u32(target, str7x_get_flash_adr(bank, FLASH_CR0), cmd);
 293
 294         cmd = str7x_get_flash_adr(bank, FLASH_NVWPAR);
 295         target_write_u32(target, str7x_get_flash_adr(bank, FLASH_AR), cmd);
 296
 297         cmd = protect_blocks;
 298         target_write_u32(target, str7x_get_flash_adr(bank, FLASH_DR0), cmd);
 299
 300         cmd = FLASH_SPR | FLASH_WMS;
 301         target_write_u32(target, str7x_get_flash_adr(bank, FLASH_CR0), cmd);
 302
 303         while (((retval = str7x_status(bank)) & str7x_info->busy_bits)) {
 304                 alive_sleep(1);
 305         }
 306
 307         retval = str7x_result(bank);
 308
 309         LOG_DEBUG("retval: 0x%8.8" PRIx32 "", retval);
 310
 311         if (retval & FLASH_ERER)
 312                 return ERROR_FLASH_SECTOR_NOT_ERASED;
 313         else if (retval & FLASH_WPF)
 314                 return ERROR_FLASH_OPERATION_FAILED;
 315
 316         return ERROR_OK;
 317 }
 318
 319 static int str7x_write_block(struct flash_bank *bank, uint8_t *buffer,
 320                 uint32_t offset, uint32_t count)
 321 {
 322         struct str7x_flash_bank *str7x_info = bank->driver_priv;
 323         struct target *target = bank->target;
 324         uint32_t buffer_size = 32768;
 325         struct working_area *source;
 326         uint32_t address = bank->base + offset;
 327         struct reg_param reg_params[6];
 328         struct arm_algorithm armv4_5_info;
 329         int retval = ERROR_OK;
 330
 331         static const uint32_t str7x_flash_write_code[] = {
 332                                         /* write:                               */
 333                 0xe3a04201, /*  mov r4, #0x10000000     */
 334                 0xe5824000, /*  str r4, [r2, #0x0]      */
 335                 0xe5821010, /*  str r1, [r2, #0x10]     */
 336                 0xe4904004, /*  ldr r4, [r0], #4        */
 337                 0xe5824008, /*  str r4, [r2, #0x8]      */
 338                 0xe4904004, /*  ldr r4, [r0], #4        */
 339                 0xe582400c, /*  str r4, [r2, #0xc]      */
 340                 0xe3a04209, /*  mov r4, #0x90000000     */
 341                 0xe5824000, /*  str r4, [r2, #0x0]      */
 342                             /* busy:                            */
 343                 0xe5924000, /*  ldr r4, [r2, #0x0]      */
 344                 0xe1140005,     /*      tst r4, r5                      */
 345                 0x1afffffc, /*  bne busy                        */
 346                 0xe5924014, /*  ldr r4, [r2, #0x14]     */
 347                 0xe31400ff, /*  tst r4, #0xff           */
 348                 0x03140c01, /*  tsteq r4, #0x100        */
 349                 0x1a000002, /*  bne exit                        */
 350                 0xe2811008, /*  add r1, r1, #0x8        */
 351                 0xe2533001, /*  subs r3, r3, #1         */
 352                 0x1affffec, /*  bne write                       */
 353                                         /* exit:                                */
 354                 0xeafffffe, /*  b exit                          */
 355         };
 356
 357         /* flash write code */
 358         if (target_alloc_working_area_try(target, sizeof(str7x_flash_write_code),
 359                         &str7x_info->write_algorithm) != ERROR_OK)
 360         {
 361                 return ERROR_TARGET_RESOURCE_NOT_AVAILABLE;
 362         };
 363
 364         target_write_buffer(target, str7x_info->write_algorithm->address,
 365                         sizeof(str7x_flash_write_code),
 366                         (uint8_t*)str7x_flash_write_code);
 367
 368         /* memory buffer */
 369         while (target_alloc_working_area_try(target, buffer_size, &source) != ERROR_OK)
 370         {
 371                 buffer_size /= 2;
 372                 if (buffer_size <= 256)
 373                 {
 374                         /* if we already allocated the writing code, but failed to get a
 375                          * buffer, free the algorithm */
 376                         if (str7x_info->write_algorithm)
 377                                 target_free_working_area(target, str7x_info->write_algorithm);
 378
 379                         LOG_WARNING("no large enough working area available, can't do block memory writes");
 380                         return ERROR_TARGET_RESOURCE_NOT_AVAILABLE;
 381                 }
 382         }
 383
 384         armv4_5_info.common_magic = ARM_COMMON_MAGIC;
 385         armv4_5_info.core_mode = ARM_MODE_SVC;
 386         armv4_5_info.core_state = ARM_STATE_ARM;
 387
 388         init_reg_param(&reg_params[0], "r0", 32, PARAM_OUT);
 389         init_reg_param(&reg_params[1], "r1", 32, PARAM_OUT);
 390         init_reg_param(&reg_params[2], "r2", 32, PARAM_OUT);
 391         init_reg_param(&reg_params[3], "r3", 32, PARAM_OUT);
 392         init_reg_param(&reg_params[4], "r4", 32, PARAM_IN);
 393         init_reg_param(&reg_params[5], "r5", 32, PARAM_OUT);
 394
 395         while (count > 0)
 396         {
 397                 uint32_t thisrun_count = (count > (buffer_size / 8)) ? (buffer_size / 8) : count;
 398
 399                 target_write_buffer(target, source->address, thisrun_count * 8, buffer);
 400
 401                 buf_set_u32(reg_params[0].value, 0, 32, source->address);
 402                 buf_set_u32(reg_params[1].value, 0, 32, address);
 403                 buf_set_u32(reg_params[2].value, 0, 32, str7x_get_flash_adr(bank, FLASH_CR0));
 404                 buf_set_u32(reg_params[3].value, 0, 32, thisrun_count);
 405                 buf_set_u32(reg_params[5].value, 0, 32, str7x_info->busy_bits);
 406
 407                 if ((retval = target_run_algorithm(target, 0, NULL, 6, reg_params,
 408                                 str7x_info->write_algorithm->address,
 409                                 str7x_info->write_algorithm->address + (sizeof(str7x_flash_write_code) - 4),
 410                                 10000, &armv4_5_info)) != ERROR_OK)
 411                 {
 412                         LOG_ERROR("error executing str7x flash write algorithm");
 413                         retval = ERROR_FLASH_OPERATION_FAILED;
 414                         break;
 415                 }
 416
 417                 if (buf_get_u32(reg_params[4].value, 0, 32) != 0x00)
 418                 {
 419                         retval = ERROR_FLASH_OPERATION_FAILED;
 420                         break;
 421                 }
 422
 423                 buffer += thisrun_count * 8;
 424                 address += thisrun_count * 8;
 425                 count -= thisrun_count;
 426         }
 427
 428         target_free_working_area(target, source);
 429         target_free_working_area(target, str7x_info->write_algorithm);
 430
 431         destroy_reg_param(&reg_params[0]);
 432         destroy_reg_param(&reg_params[1]);
 433         destroy_reg_param(&reg_params[2]);
 434         destroy_reg_param(&reg_params[3]);
 435         destroy_reg_param(&reg_params[4]);
 436         destroy_reg_param(&reg_params[5]);
 437
 438         return retval;
 439 }
 440
 441 static int str7x_write(struct flash_bank *bank, uint8_t *buffer,
 442                 uint32_t offset, uint32_t count)
 443 {
 444         struct target *target = bank->target;
 445         struct str7x_flash_bank *str7x_info = bank->driver_priv;
 446         uint32_t dwords_remaining = (count / 8);
 447         uint32_t bytes_remaining = (count & 0x00000007);
 448         uint32_t address = bank->base + offset;
 449         uint32_t bytes_written = 0;
 450         uint32_t cmd;
 451         int retval;
 452         uint32_t check_address = offset;
 453         int i;
 454
 455         if (bank->target->state != TARGET_HALTED)
 456         {
 457                 LOG_ERROR("Target not halted");
 458                 return ERROR_TARGET_NOT_HALTED;
 459         }
 460
 461         if (offset & 0x7)
 462         {
 463                 LOG_WARNING("offset 0x%" PRIx32 " breaks required 8-byte alignment", offset);
 464                 return ERROR_FLASH_DST_BREAKS_ALIGNMENT;
 465         }
 466
 467         for (i = 0; i < bank->num_sectors; i++)
 468         {
 469                 uint32_t sec_start = bank->sectors[i].offset;
 470                 uint32_t sec_end = sec_start + bank->sectors[i].size;
 471
 472                 /* check if destination falls within the current sector */
 473                 if ((check_address >= sec_start) && (check_address < sec_end))
 474                 {
 475                         /* check if destination ends in the current sector */
 476                         if (offset + count < sec_end)
 477                                 check_address = offset + count;
 478                         else
 479                                 check_address = sec_end;
 480                 }
 481         }
 482
 483         if (check_address != offset + count)
 484                 return ERROR_FLASH_DST_OUT_OF_BANK;
 485
 486         /* clear FLASH_ER register */
 487         target_write_u32(target, str7x_get_flash_adr(bank, FLASH_ER), 0x0);
 488
 489         /* multiple dwords (8-byte) to be programmed? */
 490         if (dwords_remaining > 0)
 491         {
 492                 /* try using a block write */
 493                 if ((retval = str7x_write_block(bank, buffer, offset,
 494                                 dwords_remaining)) != ERROR_OK)
 495                 {
 496                         if (retval == ERROR_TARGET_RESOURCE_NOT_AVAILABLE)
 497                         {
 498                                 /* if block write failed (no sufficient working area),
 499                                  * we use normal (slow) single dword accesses */
 500                                 LOG_WARNING("couldn't use block writes, falling back to single memory accesses");
 501                         }
 502                         else if (retval == ERROR_FLASH_OPERATION_FAILED)
 503                         {
 504                                 /* if an error occured, we examine the reason, and quit */
 505                                 retval = str7x_result(bank);
 506
 507                                 LOG_ERROR("flash writing failed with error code: 0x%x", retval);
 508                                 return ERROR_FLASH_OPERATION_FAILED;
 509                         }
 510                         else
 511                         {
 512                                 return retval;
 513                         }
 514                 }
 515                 else
 516                 {
 517                         buffer += dwords_remaining * 8;
 518                         address += dwords_remaining * 8;
 519                         dwords_remaining = 0;
 520                 }
 521         }
 522
 523         while (dwords_remaining > 0)
 524         {
 525                 /* command */
 526                 cmd = FLASH_DWPG;
 527                 target_write_u32(target, str7x_get_flash_adr(bank, FLASH_CR0), cmd);
 528
 529                 /* address */
 530                 target_write_u32(target, str7x_get_flash_adr(bank, FLASH_AR), address);
 531
 532                 /* data word 1 */
 533                 target_write_memory(target, str7x_get_flash_adr(bank, FLASH_DR0),
 534                                 4, 1, buffer + bytes_written);
 535                 bytes_written += 4;
 536
 537                 /* data word 2 */
 538                 target_write_memory(target, str7x_get_flash_adr(bank, FLASH_DR1),
 539                                 4, 1, buffer + bytes_written);
 540                 bytes_written += 4;
 541
 542                 /* start programming cycle */
 543                 cmd = FLASH_DWPG | FLASH_WMS;
 544                 target_write_u32(target, str7x_get_flash_adr(bank, FLASH_CR0), cmd);
 545
 546                 while (((retval = str7x_status(bank)) & str7x_info->busy_bits))
 547                 {
 548                         alive_sleep(1);
 549                 }
 550
 551                 retval = str7x_result(bank);
 552
 553                 if (retval & FLASH_PGER)
 554                         return ERROR_FLASH_OPERATION_FAILED;
 555                 else if (retval & FLASH_WPF)
 556                         return ERROR_FLASH_OPERATION_FAILED;
 557
 558                 dwords_remaining--;
 559                 address += 8;
 560         }
 561
 562         if (bytes_remaining)
 563         {
 564                 uint8_t last_dword[8] = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff};
 565                 int i = 0;
 566
 567                 while (bytes_remaining > 0)
 568                 {
 569                         last_dword[i++] = *(buffer + bytes_written);
 570                         bytes_remaining--;
 571                         bytes_written++;
 572                 }
 573
 574                 /* command */
 575                 cmd = FLASH_DWPG;
 576                 target_write_u32(target, str7x_get_flash_adr(bank, FLASH_CR0), cmd);
 577
 578                 /* address */
 579                 target_write_u32(target, str7x_get_flash_adr(bank, FLASH_AR), address);
 580
 581                 /* data word 1 */
 582                 target_write_memory(target, str7x_get_flash_adr(bank, FLASH_DR0),
 583                                 4, 1, last_dword);
 584                 bytes_written += 4;
 585
 586                 /* data word 2 */
 587                 target_write_memory(target, str7x_get_flash_adr(bank, FLASH_DR1),
 588                                 4, 1, last_dword + 4);
 589                 bytes_written += 4;
 590
 591                 /* start programming cycle */
 592                 cmd = FLASH_DWPG | FLASH_WMS;
 593                 target_write_u32(target, str7x_get_flash_adr(bank, FLASH_CR0), cmd);
 594
 595                 while (((retval = str7x_status(bank)) & str7x_info->busy_bits))
 596                 {
 597                         alive_sleep(1);
 598                 }
 599
 600                 retval = str7x_result(bank);
 601
 602                 if (retval & FLASH_PGER)
 603                         return ERROR_FLASH_OPERATION_FAILED;
 604                 else if (retval & FLASH_WPF)
 605                         return ERROR_FLASH_OPERATION_FAILED;
 606         }
 607
 608         return ERROR_OK;
 609 }
 610
 611 static int str7x_probe(struct flash_bank *bank)
 612 {
 613         return ERROR_OK;
 614 }
 615
 616 #if 0
 617 COMMAND_HANDLER(str7x_handle_part_id_command)
 618 {
 619         return ERROR_OK;
 620 }
 621 #endif
 622
 623 static int str7x_info(struct flash_bank *bank, char *buf, int buf_size)
 624 {
 625         snprintf(buf, buf_size, "str7x flash driver info");
 626         /* STR7x flash doesn't support sector protection interrogation.
 627          * FLASH_NVWPAR acts as a write only register; its read value
 628          * doesn't reflect the actual protection state of the sectors.
 629          */
 630         LOG_WARNING("STR7x flash lock information might not be correct "
 631                         "due to hardware limitations.");
 632         return ERROR_OK;
 633 }
 634
 635 COMMAND_HANDLER(str7x_handle_disable_jtag_command)
 636 {
 637         struct target *target = NULL;
 638         struct str7x_flash_bank *str7x_info = NULL;
 639
 640         uint32_t flash_cmd;
 641         uint16_t ProtectionLevel = 0;
 642         uint16_t ProtectionRegs;
 643
 644         if (CMD_ARGC < 1)
 645         {
 646                 command_print(CMD_CTX, "str7x disable_jtag <bank>");
 647                 return ERROR_OK;
 648         }
 649
 650         struct flash_bank *bank;
 651         int retval = CALL_COMMAND_HANDLER(flash_command_get_bank, 0, &bank);
 652         if (ERROR_OK != retval)
 653                 return retval;
 654
 655         str7x_info = bank->driver_priv;
 656
 657         target = bank->target;
 658
 659         if (target->state != TARGET_HALTED)
 660         {
 661                 LOG_ERROR("Target not halted");
 662                 return ERROR_TARGET_NOT_HALTED;
 663         }
 664
 665         /* first we get protection status */
 666         uint32_t reg;
 667         target_read_u32(target, str7x_get_flash_adr(bank, FLASH_NVAPR0), &reg);
 668
 669         if (!(reg & str7x_info->disable_bit))
 670         {
 671                 ProtectionLevel = 1;
 672         }
 673
 674         target_read_u32(target, str7x_get_flash_adr(bank, FLASH_NVAPR1), &reg);
 675         ProtectionRegs = ~(reg >> 16);
 676
 677         while (((ProtectionRegs) != 0) && (ProtectionLevel < 16))
 678         {
 679                 ProtectionRegs >>= 1;
 680                 ProtectionLevel++;
 681         }
 682
 683         if (ProtectionLevel == 0)
 684         {
 685                 flash_cmd = FLASH_SPR;
 686                 target_write_u32(target, str7x_get_flash_adr(bank, FLASH_CR0), flash_cmd);
 687                 target_write_u32(target, str7x_get_flash_adr(bank, FLASH_AR), 0x4010DFB8);
 688                 target_write_u32(target, str7x_get_flash_adr(bank, FLASH_DR0), 0xFFFFFFFD);
 689                 flash_cmd = FLASH_SPR | FLASH_WMS;
 690                 target_write_u32(target, str7x_get_flash_adr(bank, FLASH_CR0), flash_cmd);
 691         }
 692         else
 693         {
 694                 flash_cmd = FLASH_SPR;
 695                 target_write_u32(target, str7x_get_flash_adr(bank, FLASH_CR0), flash_cmd);
 696                 target_write_u32(target, str7x_get_flash_adr(bank, FLASH_AR), 0x4010DFBC);
 697                 target_write_u32(target, str7x_get_flash_adr(bank, FLASH_DR0),
 698                                 ~(1 << (15 + ProtectionLevel)));
 699                 flash_cmd = FLASH_SPR | FLASH_WMS;
 700                 target_write_u32(target, str7x_get_flash_adr(bank, FLASH_CR0), flash_cmd);
 701         }
 702
 703         return ERROR_OK;
 704 }
 705
 706 static const struct command_registration str7x_exec_command_handlers[] = {
 707         {
 708                 .name = "disable_jtag",
 709                 .handler = str7x_handle_disable_jtag_command,
 710                 .mode = COMMAND_EXEC,
 711                 .help = "disable jtag access",
 712         },
 713         COMMAND_REGISTRATION_DONE
 714 };
 715
 716 static const struct command_registration str7x_command_handlers[] = {
 717         {
 718                 .name = "str7x",
 719                 .mode = COMMAND_ANY,
 720                 .help = "str7x flash command group",
 721                 .chain = str7x_exec_command_handlers,
 722         },
 723         COMMAND_REGISTRATION_DONE
 724 };
 725
 726 struct flash_driver str7x_flash = {
 727         .name = "str7x",
 728         .commands = str7x_command_handlers,
 729         .flash_bank_command = str7x_flash_bank_command,
 730         .erase = str7x_erase,
 731         .protect = str7x_protect,
 732         .write = str7x_write,
 733         .probe = str7x_probe,
 734         .auto_probe = str7x_probe,
 735         .erase_check = default_flash_blank_check,
 736         .protect_check = str7x_protect_check,
 737         .info = str7x_info,
 738 };