git.gag.com Git - fw/openocd/blob - src/flash/at91sam7.c

   1 /***************************************************************************
   2  *   Copyright (C) 2006 by Magnus Lundin                                   *
   3  *   lundin@mlu.mine.nu                                                        *
   4  *                                                                                                             *
   5  *   This program is free software; you can redistribute it and/or modify  *
   6  *   it under the terms of the GNU General Public License as published by  *
   7  *   the Free Software Foundation; either version 2 of the License, or     *
   8  *   (at your option) any later version.                                   *
   9  *                                                                         *
  10  *   This program is distributed in the hope that it will be useful,       *
  11  *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
  12  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
  13  *   GNU General Public License for more details.                          *
  14  *                                                                         *
  15  *   You should have received a copy of the GNU General Public License     *
  16  *   along with this program; if not, write to the                         *
  17  *   Free Software Foundation, Inc.,                                       *
  18  *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             *
  19  ***************************************************************************/
  20
  21 /***************************************************************************
  22 There are some things to notice
  23
  24 * AT91SAM7S64 is tested
  25 * All AT91SAM7Sxx  and  AT91SAM7Xxx should work but is not tested
  26 * All parameters are identified from onchip configuartion registers
  27 *
  28 * The flash controller handles erases automatically on a page (128/265 byte) basis
  29 * Only an EraseAll command is supported by the controller
  30 * Partial erases can be implemented in software by writing one 0xFFFFFFFF word to
  31 * some location in every page in the region to be erased
  32 *
  33 * Lock regions (sectors) are 32 or 64 pages
  34 *
  35  ***************************************************************************/
  36 #ifdef HAVE_CONFIG_H
  37 #include "config.h"
  38 #endif
  39
  40 #include "replacements.h"
  41
  42 #include "at91sam7.h"
  43
  44 #include "flash.h"
  45 #include "target.h"
  46 #include "log.h"
  47 #include "binarybuffer.h"
  48 #include "types.h"
  49
  50 #include <stdlib.h>
  51 #include <string.h>
  52 #include <unistd.h>
  53
  54 int at91sam7_register_commands(struct command_context_s *cmd_ctx);
  55 int at91sam7_flash_bank_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc, struct flash_bank_s *bank);
  56 int at91sam7_erase(struct flash_bank_s *bank, int first, int last);
  57 int at91sam7_protect(struct flash_bank_s *bank, int set, int first, int last);
  58 int at91sam7_write(struct flash_bank_s *bank, u8 *buffer, u32 offset, u32 count);
  59 int at91sam7_probe(struct flash_bank_s *bank);
  60 int at91sam7_erase_check(struct flash_bank_s *bank);
  61 int at91sam7_protect_check(struct flash_bank_s *bank);
  62 int at91sam7_info(struct flash_bank_s *bank, char *buf, int buf_size);
  63
  64 u32 at91sam7_get_flash_status(flash_bank_t *bank);
  65 void at91sam7_set_flash_mode(flash_bank_t *bank,int mode);
  66 u32 at91sam7_wait_status_busy(flash_bank_t *bank, u32 waitbits, int timeout);
  67 int at91sam7_handle_gpnvm_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
  68
  69 flash_driver_t at91sam7_flash =
  70 {
  71         .name = "at91sam7",
  72         .register_commands = at91sam7_register_commands,
  73         .flash_bank_command = at91sam7_flash_bank_command,
  74         .erase = at91sam7_erase,
  75         .protect = at91sam7_protect,
  76         .write = at91sam7_write,
  77         .probe = at91sam7_probe,
  78         .erase_check = at91sam7_erase_check,
  79         .protect_check = at91sam7_protect_check,
  80         .info = at91sam7_info
  81 };
  82
  83
  84 char * EPROC[8]= {"Unknown","ARM946-E","ARM7TDMI","Unknown","ARM920T","ARM926EJ-S","Unknown","Unknown"};
  85 long NVPSIZ[16] = {
  86    0,
  87    0x2000, /*  8K */
  88    0x4000, /* 16K */
  89    0x8000, /* 32K */
  90    -1,
  91    0x10000, /* 64K */
  92    -1,
  93    0x20000, /* 128K */
  94    -1,
  95    0x40000, /* 256K */
  96    0x80000, /* 512K */
  97    -1,
  98    0x100000, /* 1024K */
  99    -1,
 100    0x200000, /* 2048K */
 101    -1
 102 };
 103
 104 long SRAMSIZ[16] = {
 105    -1,
 106    0x0400, /*  1K */
 107    0x0800, /*  2K */
 108    -1,
 109    0x1c000,  /* 112K */
 110    0x1000,  /*   4K */
 111    0x14000, /*  80K */
 112    0x28000, /* 160K */
 113    0x2000,  /*   8K */
 114    0x4000,  /*  16K */
 115    0x8000,  /*  32K */
 116    0x10000, /*  64K */
 117    0x20000, /* 128K */
 118    0x40000, /* 256K */
 119    0x18000, /* 96K */
 120    0x80000, /* 512K */
 121 };
 122
 123 int at91sam7_register_commands(struct command_context_s *cmd_ctx)
 124 {
 125         command_t *at91sam7_cmd = register_command(cmd_ctx, NULL, "at91sam7", NULL, COMMAND_ANY, NULL);
 126         register_command(cmd_ctx, at91sam7_cmd, "gpnvm", at91sam7_handle_gpnvm_command, COMMAND_EXEC,
 127                         "at91sam7 gpnvm <num> <bit> set|clear, set or clear at91sam7 gpnvm bit");
 128
 129         return ERROR_OK;
 130 }
 131
 132 u32 at91sam7_get_flash_status(flash_bank_t *bank)
 133 {
 134         target_t *target = bank->target;
 135         u32 fsr;
 136
 137         target_read_u32(target, MC_FSR, &fsr);
 138
 139         return fsr;
 140 }
 141
 142 /** Read clock configuration and set at91sam7_info->usec_clocks*/
 143 void at91sam7_read_clock_info(flash_bank_t *bank)
 144 {
 145         at91sam7_flash_bank_t *at91sam7_info = bank->driver_priv;
 146         target_t *target = bank->target;
 147         u32 mckr, mcfr, pllr;
 148         unsigned long tmp = 0, mainfreq;
 149
 150         /* Read main clock freqency register */
 151         target_read_u32(target, CKGR_MCFR, &mcfr);
 152         /* Read master clock register */
 153         target_read_u32(target, PMC_MCKR, &mckr);
 154         /* Read Clock Generator PLL Register  */
 155         target_read_u32(target, CKGR_PLLR, &pllr);
 156
 157         at91sam7_info->mck_valid = 0;
 158         switch (mckr & PMC_MCKR_CSS) {
 159         case 0:                 /* Slow Clock */
 160                 at91sam7_info->mck_valid = 1;
 161                 tmp = RC_FREQ;
 162                 break;
 163         case 1:                 /* Main Clock */
 164                 if (mcfr & CKGR_MCFR_MAINRDY)
 165                 {
 166                         at91sam7_info->mck_valid = 1;
 167                         mainfreq = RC_FREQ / 16ul * (mcfr & 0xffff);
 168                         tmp = mainfreq;
 169                 }
 170                 break;
 171
 172         case 2:                 /* Reserved */
 173                 break;
 174         case 3:         /* PLL Clock */
 175                 if (mcfr & CKGR_MCFR_MAINRDY)
 176                 {
 177                         target_read_u32(target, CKGR_PLLR, &pllr);
 178                         if (!(pllr & CKGR_PLLR_DIV))
 179                                 break; /* 0 Hz */
 180                         at91sam7_info->mck_valid = 1;
 181                         mainfreq = RC_FREQ / 16ul * (mcfr & 0xffff);
 182                         /* Integer arithmetic should have sufficient precision
 183                            as long as PLL is properly configured. */
 184                         tmp = mainfreq / (pllr & CKGR_PLLR_DIV) *
 185                           (((pllr & CKGR_PLLR_MUL) >> 16) + 1);
 186                 }
 187                 break;
 188         }
 189
 190         /* Prescaler adjust */
 191         if (((mckr & PMC_MCKR_PRES) >> 2) == 7)
 192                 at91sam7_info->mck_valid = 0;
 193         else
 194                 at91sam7_info->mck_freq = tmp >> ((mckr & PMC_MCKR_PRES) >> 2);
 195
 196         /* Forget old flash timing */
 197        at91sam7_set_flash_mode(bank,FMR_TIMING_NONE);
 198 }
 199
 200 /* Setup the timimg registers for nvbits or normal flash */
 201 void at91sam7_set_flash_mode(flash_bank_t *bank,int mode)
 202 {
 203         u32 fmr, fmcn = 0, fws = 0;
 204         at91sam7_flash_bank_t *at91sam7_info = bank->driver_priv;
 205         target_t *target = bank->target;
 206
 207         if (mode && (mode != at91sam7_info->flashmode))
 208         {
 209                 /* Always round up (ceil) */
 210               if (mode==FMR_TIMING_NVBITS)
 211               {
 212                      if (at91sam7_info->cidr_arch == 0x60)
 213                      {
 214                             /* AT91SAM7A3 uses master clocks in 100 ns */
 215                             fmcn = (at91sam7_info->mck_freq/10000000ul)+1;
 216                      }
 217                      else
 218                      {
 219                             /* master clocks in 1uS for ARCH 0x7 types */
 220                             fmcn = (at91sam7_info->mck_freq/1000000ul)+1;
 221                      }
 222               }
 223               else if (mode==FMR_TIMING_FLASH)
 224                         /* main clocks in 1.5uS */
 225                         fmcn = (at91sam7_info->mck_freq/666666ul)+1;
 226
 227                 /* Only allow fmcn=0 if clock period is > 30 us = 33kHz. */
 228                 if (at91sam7_info->mck_freq <= 33333ul)
 229                         fmcn = 0;
 230                 /* Only allow fws=0 if clock frequency is < 30 MHz. */
 231                 if (at91sam7_info->mck_freq > 30000000ul)
 232                         fws = 1;
 233
 234                 DEBUG("fmcn: %i", fmcn);
 235                 fmr = fmcn << 16 | fws << 8;
 236                 target_write_u32(target, MC_FMR, fmr);
 237         }
 238
 239         at91sam7_info->flashmode = mode;
 240 }
 241
 242 u32 at91sam7_wait_status_busy(flash_bank_t *bank, u32 waitbits, int timeout)
 243 {
 244         u32 status;
 245
 246        while ((!((status = at91sam7_get_flash_status(bank)) & waitbits)) && (timeout-- > 0))
 247         {
 248                 DEBUG("status: 0x%x", status);
 249                 usleep(1000);
 250         }
 251
 252         DEBUG("status: 0x%x", status);
 253
 254         if (status & 0x0C)
 255         {
 256                 ERROR("status register: 0x%x", status);
 257                 if (status & 0x4)
 258                         ERROR("Lock Error Bit Detected, Operation Abort");
 259                 if (status & 0x8)
 260                         ERROR("Invalid command and/or bad keyword, Operation Abort");
 261                 if (status & 0x10)
 262                         ERROR("Security Bit Set, Operation Abort");
 263         }
 264
 265         return status;
 266 }
 267
 268
 269 /* Send one command to the AT91SAM flash controller */
 270 int at91sam7_flash_command(struct flash_bank_s *bank,u8 cmd,u16 pagen)
 271 {
 272         u32 fcr;
 273         at91sam7_flash_bank_t *at91sam7_info = bank->driver_priv;
 274         target_t *target = bank->target;
 275
 276         fcr = (0x5A<<24) | (pagen<<8) | cmd;
 277         target_write_u32(target, MC_FCR, fcr);
 278         DEBUG("Flash command: 0x%x, pagenumber:%u", fcr, pagen);
 279
 280        if ((at91sam7_info->cidr_arch == 0x60)&&((cmd==SLB)|(cmd==CLB)))
 281         {
 282               /* Lock bit manipulation on AT91SAM7A3 waits for FC_FSR bit 1, EOL */
 283               if (at91sam7_wait_status_busy(bank, MC_FSR_EOL, 10)&0x0C)
 284               {
 285                      return ERROR_FLASH_OPERATION_FAILED;
 286               }
 287               return ERROR_OK;
 288        }
 289
 290        if (at91sam7_wait_status_busy(bank, MC_FSR_FRDY, 10)&0x0C)
 291        {
 292                 return ERROR_FLASH_OPERATION_FAILED;
 293         }
 294         return ERROR_OK;
 295 }
 296
 297 /* Read device id register, main clock frequency register and fill in driver info structure */
 298 int at91sam7_read_part_info(struct flash_bank_s *bank)
 299 {
 300         at91sam7_flash_bank_t *at91sam7_info = bank->driver_priv;
 301         target_t *target = bank->target;
 302         u32 cidr, status;
 303
 304         if (bank->target->state != TARGET_HALTED)
 305         {
 306                 return ERROR_TARGET_NOT_HALTED;
 307         }
 308
 309         /* Read and parse chip identification register */
 310         target_read_u32(target, DBGU_CIDR, &cidr);
 311
 312         if (cidr == 0)
 313         {
 314                 WARNING("Cannot identify target as an AT91SAM");
 315                 return ERROR_FLASH_OPERATION_FAILED;
 316         }
 317
 318         at91sam7_info->cidr = cidr;
 319         at91sam7_info->cidr_ext = (cidr>>31)&0x0001;
 320         at91sam7_info->cidr_nvptyp = (cidr>>28)&0x0007;
 321         at91sam7_info->cidr_arch = (cidr>>20)&0x00FF;
 322         at91sam7_info->cidr_sramsiz = (cidr>>16)&0x000F;
 323         at91sam7_info->cidr_nvpsiz2 = (cidr>>12)&0x000F;
 324         at91sam7_info->cidr_nvpsiz = (cidr>>8)&0x000F;
 325         at91sam7_info->cidr_eproc = (cidr>>5)&0x0007;
 326         at91sam7_info->cidr_version = cidr&0x001F;
 327         bank->size = NVPSIZ[at91sam7_info->cidr_nvpsiz];
 328         at91sam7_info->target_name = "Unknown";
 329
 330         /* Support just for bulk erase of the whole device */
 331         bank->num_sectors = 1;
 332         bank->sectors = malloc(sizeof(flash_sector_t));
 333         bank->sectors[0].offset = 0;
 334         bank->sectors[0].size = bank->size;
 335         bank->sectors[0].is_erased = -1;
 336         bank->sectors[0].is_protected = -1;
 337
 338         DEBUG("nvptyp: 0x%3.3x, arch: 0x%4.4x", at91sam7_info->cidr_nvptyp, at91sam7_info->cidr_arch );
 339
 340         /* Read main and master clock freqency register */
 341         at91sam7_read_clock_info(bank);
 342
 343         status = at91sam7_get_flash_status(bank);
 344         at91sam7_info->lockbits = status>>16;
 345         at91sam7_info->securitybit = (status>>4)&0x01;
 346
 347         if (at91sam7_info->cidr_arch == 0x70 )
 348         {
 349                 at91sam7_info->num_nvmbits = 2;
 350                 at91sam7_info->nvmbits = (status>>8)&0x03;
 351                 bank->base = 0x100000;
 352                 bank->bus_width = 4;
 353                 if (bank->size==0x40000)  /* AT91SAM7S256 */
 354                 {
 355                         at91sam7_info->target_name = "AT91SAM7S256";
 356                         at91sam7_info->num_lockbits = 16;
 357                         at91sam7_info->pagesize = 256;
 358                         at91sam7_info->pages_in_lockregion = 64;
 359                         at91sam7_info->num_pages = 16*64;
 360                 }
 361                 if (bank->size==0x20000)  /* AT91SAM7S128 */
 362                 {
 363                         at91sam7_info->target_name = "AT91SAM7S128";
 364                         at91sam7_info->num_lockbits = 8;
 365                         at91sam7_info->pagesize = 256;
 366                         at91sam7_info->pages_in_lockregion = 64;
 367                         at91sam7_info->num_pages = 8*64;
 368                 }
 369                 if (bank->size==0x10000)  /* AT91SAM7S64 */
 370                 {
 371                         at91sam7_info->target_name = "AT91SAM7S64";
 372                         at91sam7_info->num_lockbits = 16;
 373                         at91sam7_info->pagesize = 128;
 374                         at91sam7_info->pages_in_lockregion = 32;
 375                         at91sam7_info->num_pages = 16*32;
 376                 }
 377                 if (bank->size==0x08000)  /* AT91SAM7S321/32 */
 378                 {
 379                         at91sam7_info->target_name = "AT91SAM7S321/32";
 380                         at91sam7_info->num_lockbits = 8;
 381                         at91sam7_info->pagesize = 128;
 382                         at91sam7_info->pages_in_lockregion = 32;
 383                         at91sam7_info->num_pages = 8*32;
 384                 }
 385
 386                 return ERROR_OK;
 387         }
 388
 389         if (at91sam7_info->cidr_arch == 0x71 )
 390         {
 391                 at91sam7_info->num_nvmbits = 3;
 392                 at91sam7_info->nvmbits = (status>>8)&0x07;
 393                 bank->base = 0x100000;
 394                 bank->bus_width = 4;
 395                 if (bank->size==0x40000)  /* AT91SAM7XC256 */
 396                 {
 397                         at91sam7_info->target_name = "AT91SAM7XC256";
 398                         at91sam7_info->num_lockbits = 16;
 399                         at91sam7_info->pagesize = 256;
 400                         at91sam7_info->pages_in_lockregion = 64;
 401                         at91sam7_info->num_pages = 16*64;
 402                 }
 403                 if (bank->size==0x20000)  /* AT91SAM7XC128 */
 404                 {
 405                         at91sam7_info->target_name = "AT91SAM7XC128";
 406                         at91sam7_info->num_lockbits = 8;
 407                         at91sam7_info->pagesize = 256;
 408                         at91sam7_info->pages_in_lockregion = 64;
 409                         at91sam7_info->num_pages = 8*64;
 410                 }
 411
 412                 return ERROR_OK;
 413         }
 414
 415         if (at91sam7_info->cidr_arch == 0x72 )
 416         {
 417                 at91sam7_info->num_nvmbits = 2;
 418                 at91sam7_info->nvmbits = (status>>8)&0x03;
 419                 bank->base = 0x100000;
 420                 bank->bus_width = 4;
 421                 if (bank->size==0x80000) /* AT91SAM7SE512 */
 422                 {
 423                         at91sam7_info->target_name = "AT91SAM7SE512";
 424                         at91sam7_info->num_lockbits = 32;
 425                         at91sam7_info->pagesize = 256;
 426                         at91sam7_info->pages_in_lockregion = 64;
 427                         at91sam7_info->num_pages = 32*64;
 428                 }
 429                 if (bank->size==0x40000)
 430                 {
 431                         at91sam7_info->target_name = "AT91SAM7SE256";
 432                         at91sam7_info->num_lockbits = 16;
 433                         at91sam7_info->pagesize = 256;
 434                         at91sam7_info->pages_in_lockregion = 64;
 435                         at91sam7_info->num_pages = 16*64;
 436                 }
 437                 if (bank->size==0x08000)
 438                 {
 439                         at91sam7_info->target_name = "AT91SAM7SE32";
 440                         at91sam7_info->num_lockbits = 8;
 441                         at91sam7_info->pagesize = 128;
 442                         at91sam7_info->pages_in_lockregion = 32;
 443                         at91sam7_info->num_pages = 8*32;
 444                 }
 445
 446                 return ERROR_OK;
 447         }
 448
 449         if (at91sam7_info->cidr_arch == 0x75 )
 450         {
 451                 at91sam7_info->num_nvmbits = 3;
 452                 at91sam7_info->nvmbits = (status>>8)&0x07;
 453                 bank->base = 0x100000;
 454                 bank->bus_width = 4;
 455                 if (bank->size==0x40000)  /* AT91SAM7X256 */
 456                 {
 457                         at91sam7_info->target_name = "AT91SAM7X256";
 458                         at91sam7_info->num_lockbits = 16;
 459                         at91sam7_info->pagesize = 256;
 460                         at91sam7_info->pages_in_lockregion = 64;
 461                         at91sam7_info->num_pages = 16*64;
 462                 }
 463                 if (bank->size==0x20000)  /* AT91SAM7X128 */
 464                 {
 465                         at91sam7_info->target_name = "AT91SAM7X128";
 466                         at91sam7_info->num_lockbits = 8;
 467                         at91sam7_info->pagesize = 256;
 468                         at91sam7_info->pages_in_lockregion = 64;
 469                         at91sam7_info->num_pages = 8*64;
 470                 }
 471
 472                 return ERROR_OK;
 473         }
 474
 475         if (at91sam7_info->cidr_arch == 0x60 )
 476         {
 477                 at91sam7_info->num_nvmbits = 3;
 478                 at91sam7_info->nvmbits = (status>>8)&0x07;
 479                 bank->base = 0x100000;
 480                 bank->bus_width = 4;
 481
 482                 if (bank->size == 0x40000)  /* AT91SAM7A3 */
 483                 {
 484                         at91sam7_info->target_name = "AT91SAM7A3";
 485                         at91sam7_info->num_lockbits = 16;
 486                         at91sam7_info->pagesize = 256;
 487                      at91sam7_info->pages_in_lockregion = 16;
 488                         at91sam7_info->num_pages = 16*64;
 489                 }
 490                 return ERROR_OK;
 491         }
 492
 493    WARNING("at91sam7 flash only tested for AT91SAM7Sxx series");
 494
 495    return ERROR_OK;
 496 }
 497
 498 int at91sam7_erase_check(struct flash_bank_s *bank)
 499 {
 500         at91sam7_flash_bank_t *at91sam7_info = bank->driver_priv;
 501
 502         if (!at91sam7_info->working_area_size)
 503         {
 504         }
 505         else
 506         {
 507         }
 508
 509         return ERROR_OK;
 510 }
 511
 512 int at91sam7_protect_check(struct flash_bank_s *bank)
 513 {
 514         u32 status;
 515
 516         at91sam7_flash_bank_t *at91sam7_info = bank->driver_priv;
 517
 518         if (at91sam7_info->cidr == 0)
 519         {
 520                 at91sam7_read_part_info(bank);
 521         }
 522
 523         if (at91sam7_info->cidr == 0)
 524         {
 525                 WARNING("Cannot identify target as an AT91SAM");
 526                 return ERROR_FLASH_OPERATION_FAILED;
 527         }
 528
 529         status = at91sam7_get_flash_status(bank);
 530         at91sam7_info->lockbits = status >> 16;
 531
 532         return ERROR_OK;
 533 }
 534
 535 /* flash_bank at91sam7 0 0 0 0 <target#>
 536  */
 537 int at91sam7_flash_bank_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc, struct flash_bank_s *bank)
 538 {
 539         at91sam7_flash_bank_t *at91sam7_info;
 540
 541         if (argc < 6)
 542         {
 543                 WARNING("incomplete flash_bank at91sam7 configuration");
 544                 return ERROR_FLASH_BANK_INVALID;
 545         }
 546
 547         at91sam7_info = malloc(sizeof(at91sam7_flash_bank_t));
 548         bank->driver_priv = at91sam7_info;
 549
 550         /* part wasn't probed for info yet */
 551         at91sam7_info->cidr = 0;
 552
 553         return ERROR_OK;
 554 }
 555
 556 int at91sam7_erase(struct flash_bank_s *bank, int first, int last)
 557 {
 558         at91sam7_flash_bank_t *at91sam7_info = bank->driver_priv;
 559
 560         if (bank->target->state != TARGET_HALTED)
 561         {
 562                 return ERROR_TARGET_NOT_HALTED;
 563         }
 564
 565         if (at91sam7_info->cidr == 0)
 566         {
 567                 at91sam7_read_part_info(bank);
 568         }
 569
 570         if (at91sam7_info->cidr == 0)
 571         {
 572                 WARNING("Cannot identify target as an AT91SAM");
 573                 return ERROR_FLASH_OPERATION_FAILED;
 574         }
 575
 576         if ((first < 0) || (last < first) || (last >= bank->num_sectors))
 577         {
 578                 if ((first == 0) && (last == (at91sam7_info->num_lockbits-1)))
 579                 {
 580                         WARNING("Sector numbers based on lockbit count, probably a deprecated script");
 581                         last = bank->num_sectors-1;
 582                 }
 583                 else return ERROR_FLASH_SECTOR_INVALID;
 584         }
 585
 586         if ((first != 0) || (last != (bank->num_sectors-1)))
 587         {
 588                 WARNING("Can only erase the whole flash area, pages are autoerased on write");
 589                 return ERROR_FLASH_OPERATION_FAILED;
 590         }
 591
 592         /* Configure the flash controller timing */
 593         at91sam7_read_clock_info(bank);
 594         at91sam7_set_flash_mode(bank,FMR_TIMING_FLASH);
 595
 596         return at91sam7_flash_command(bank, EA, 0);
 597 }
 598
 599 int at91sam7_protect(struct flash_bank_s *bank, int set, int first, int last)
 600 {
 601         u32 cmd, pagen, status;
 602         int lockregion;
 603
 604         at91sam7_flash_bank_t *at91sam7_info = bank->driver_priv;
 605
 606         if (bank->target->state != TARGET_HALTED)
 607         {
 608                 return ERROR_TARGET_NOT_HALTED;
 609         }
 610
 611         if ((first < 0) || (last < first) || (last >= at91sam7_info->num_lockbits))
 612         {
 613                 return ERROR_FLASH_SECTOR_INVALID;
 614         }
 615
 616         if (at91sam7_info->cidr == 0)
 617         {
 618                 at91sam7_read_part_info(bank);
 619         }
 620
 621         if (at91sam7_info->cidr == 0)
 622         {
 623                 WARNING("Cannot identify target as an AT91SAM");
 624                 return ERROR_FLASH_OPERATION_FAILED;
 625         }
 626
 627         /* Configure the flash controller timing */
 628         at91sam7_read_clock_info(bank);
 629        at91sam7_set_flash_mode(bank,FMR_TIMING_NVBITS);
 630
 631         for (lockregion=first;lockregion<=last;lockregion++)
 632         {
 633                 pagen = lockregion*at91sam7_info->pages_in_lockregion;
 634                 if (set)
 635                          cmd = SLB;
 636                 else
 637                          cmd = CLB;
 638                 if (at91sam7_flash_command(bank, cmd, pagen) != ERROR_OK)
 639                 {
 640                         return ERROR_FLASH_OPERATION_FAILED;
 641                 }
 642         }
 643
 644         status = at91sam7_get_flash_status(bank);
 645         at91sam7_info->lockbits = status>>16;
 646
 647         return ERROR_OK;
 648 }
 649
 650
 651 int at91sam7_write(struct flash_bank_s *bank, u8 *buffer, u32 offset, u32 count)
 652 {
 653         at91sam7_flash_bank_t *at91sam7_info = bank->driver_priv;
 654         target_t *target = bank->target;
 655         u32 dst_min_alignment, wcount, bytes_remaining = count;
 656         u32 first_page, last_page, pagen, buffer_pos;
 657
 658         if (bank->target->state != TARGET_HALTED)
 659         {
 660                 return ERROR_TARGET_NOT_HALTED;
 661         }
 662
 663         if (at91sam7_info->cidr == 0)
 664         {
 665                 at91sam7_read_part_info(bank);
 666         }
 667
 668         if (at91sam7_info->cidr == 0)
 669         {
 670                 WARNING("Cannot identify target as an AT91SAM");
 671                 return ERROR_FLASH_OPERATION_FAILED;
 672         }
 673
 674         if (offset + count > bank->size)
 675                 return ERROR_FLASH_DST_OUT_OF_BANK;
 676
 677         dst_min_alignment = at91sam7_info->pagesize;
 678
 679         if (offset % dst_min_alignment)
 680         {
 681                 WARNING("offset 0x%x breaks required alignment 0x%x", offset, dst_min_alignment);
 682                 return ERROR_FLASH_DST_BREAKS_ALIGNMENT;
 683         }
 684
 685         if (at91sam7_info->cidr_arch == 0)
 686                 return ERROR_FLASH_BANK_NOT_PROBED;
 687
 688         first_page = offset/dst_min_alignment;
 689         last_page = CEIL(offset + count, dst_min_alignment);
 690
 691         DEBUG("first_page: %i, last_page: %i, count %i", first_page, last_page, count);
 692
 693         /* Configure the flash controller timing */
 694         at91sam7_read_clock_info(bank);
 695         at91sam7_set_flash_mode(bank,FMR_TIMING_FLASH);
 696
 697         for (pagen=first_page; pagen<last_page; pagen++) {
 698                 if (bytes_remaining<dst_min_alignment)
 699                 count = bytes_remaining;
 700                 else
 701                 count = dst_min_alignment;
 702                 bytes_remaining -= count;
 703
 704                 /* Write one block to the PageWriteBuffer */
 705                 buffer_pos = (pagen-first_page)*dst_min_alignment;
 706                 wcount = CEIL(count,4);
 707                 target->type->write_memory(target, bank->base, 4, wcount, buffer+buffer_pos);
 708
 709                 /* Send Write Page command to Flash Controller */
 710                 if (at91sam7_flash_command(bank, WP, pagen) != ERROR_OK)
 711                 {
 712                         return ERROR_FLASH_OPERATION_FAILED;
 713                 }
 714                 DEBUG("Write page number:%i", pagen);
 715         }
 716
 717         return ERROR_OK;
 718 }
 719
 720
 721 int at91sam7_probe(struct flash_bank_s *bank)
 722 {
 723         /* we can't probe on an at91sam7
 724          * if this is an at91sam7, it has the configured flash
 725          */
 726         at91sam7_flash_bank_t *at91sam7_info = bank->driver_priv;
 727
 728         if (at91sam7_info->cidr == 0)
 729         {
 730                 at91sam7_read_part_info(bank);
 731         }
 732
 733         if (at91sam7_info->cidr == 0)
 734         {
 735                 WARNING("Cannot identify target as an AT91SAM");
 736                 return ERROR_FLASH_OPERATION_FAILED;
 737         }
 738
 739         return ERROR_OK;
 740 }
 741
 742 int at91sam7_info(struct flash_bank_s *bank, char *buf, int buf_size)
 743 {
 744         int printed;
 745         at91sam7_flash_bank_t *at91sam7_info = bank->driver_priv;
 746
 747         at91sam7_read_part_info(bank);
 748
 749         if (at91sam7_info->cidr == 0)
 750         {
 751                 printed = snprintf(buf, buf_size, "Cannot identify target as an AT91SAM\n");
 752                 buf += printed;
 753                 buf_size -= printed;
 754                 return ERROR_FLASH_OPERATION_FAILED;
 755         }
 756
 757        printed = snprintf(buf, buf_size, "\nat91sam7 information: Chip is %s\n",at91sam7_info->target_name);
 758         buf += printed;
 759         buf_size -= printed;
 760
 761         printed = snprintf(buf, buf_size, "cidr: 0x%8.8x, arch: 0x%4.4x, eproc: %s, version:0x%3.3x,  flashsize: 0x%8.8x\n", at91sam7_info->cidr, at91sam7_info->cidr_arch, EPROC[at91sam7_info->cidr_eproc], at91sam7_info->cidr_version, bank->size);
 762         buf += printed;
 763         buf_size -= printed;
 764
 765         printed = snprintf(buf, buf_size, "master clock(estimated): %ikHz \n", at91sam7_info->mck_freq / 1000);
 766         buf += printed;
 767         buf_size -= printed;
 768
 769         if (at91sam7_info->num_lockbits>0) {
 770                 printed = snprintf(buf, buf_size, "pagesize: %i, lockbits: %i 0x%4.4x, pages in lock region: %i \n", at91sam7_info->pagesize, at91sam7_info->num_lockbits, at91sam7_info->lockbits,at91sam7_info->num_pages/at91sam7_info->num_lockbits);
 771                 buf += printed;
 772                 buf_size -= printed;
 773         }
 774
 775         printed = snprintf(buf, buf_size, "securitybit: %i, nvmbits: 0x%1.1x\n", at91sam7_info->securitybit, at91sam7_info->nvmbits);
 776         buf += printed;
 777         buf_size -= printed;
 778
 779         return ERROR_OK;
 780 }
 781
 782 /*
 783 * On AT91SAM7S: When the gpnmv bits are set with
 784 * > at91sam7 gpnvm 0 bitnr set
 785 * the changes are not visible in the flash controller status register MC_FSR
 786 * until the processor has been reset.
 787 * On the Olimex board this requires a power cycle.
 788 * Note that the AT91SAM7S has the following errata (doc6175.pdf sec 14.1.3):
 789 *       The maximum number of write/erase cycles for Non Volatile Memory bits is 100. This includes
 790 *       Lock Bits (LOCKx), General Purpose NVM bits (GPNVMx) and the Security Bit.
 791 */
 792 int at91sam7_handle_gpnvm_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
 793 {
 794         flash_bank_t *bank;
 795         int bit;
 796         u8  flashcmd;
 797         u32 status;
 798         char *value;
 799         at91sam7_flash_bank_t *at91sam7_info;
 800
 801         if (argc < 3)
 802         {
 803                 command_print(cmd_ctx, "at91sam7 gpnvm <num> <bit> <set|clear>");
 804                 return ERROR_OK;
 805         }
 806
 807         bank = get_flash_bank_by_num(strtoul(args[0], NULL, 0));
 808         bit = atoi(args[1]);
 809         value = args[2];
 810
 811         if (!bank)
 812         {
 813                 command_print(cmd_ctx, "flash bank '#%s' is out of bounds", args[0]);
 814                 return ERROR_OK;
 815         }
 816
 817         at91sam7_info = bank->driver_priv;
 818
 819         if (bank->target->state != TARGET_HALTED)
 820         {
 821                 return ERROR_TARGET_NOT_HALTED;
 822         }
 823
 824         if (at91sam7_info->cidr == 0)
 825         {
 826                 at91sam7_read_part_info(bank);
 827         }
 828
 829         if (at91sam7_info->cidr == 0)
 830         {
 831                 WARNING("Cannot identify target as an AT91SAM");
 832                 return ERROR_FLASH_OPERATION_FAILED;
 833         }
 834
 835         if ((bit<0) || (at91sam7_info->num_nvmbits <= bit))
 836         {
 837                 command_print(cmd_ctx, "gpnvm bit '#%s' is out of bounds for target %s", args[1],at91sam7_info->target_name);
 838                 return ERROR_OK;
 839         }
 840
 841         if (strcmp(value, "set") == 0)
 842         {
 843                 flashcmd = SGPB;
 844         }
 845         else if (strcmp(value, "clear") == 0)
 846         {
 847                 flashcmd = CGPB;
 848         }
 849         else
 850         {
 851                 command_print(cmd_ctx, "usage: at91sam7 gpnvm <num> <bit> <set|clear>");
 852                 return ERROR_OK;
 853         }
 854
 855         /* Configure the flash controller timing */
 856         at91sam7_read_clock_info(bank);
 857        at91sam7_set_flash_mode(bank,FMR_TIMING_NVBITS);
 858
 859         if (at91sam7_flash_command(bank, flashcmd, (u16)(bit)) != ERROR_OK)
 860         {
 861                 return ERROR_FLASH_OPERATION_FAILED;
 862         }
 863
 864         status = at91sam7_get_flash_status(bank);
 865         DEBUG("at91sam7_handle_gpnvm_command: cmd 0x%x, value 0x%x, status 0x%x \n",flashcmd,bit,status);
 866         at91sam7_info->nvmbits = (status>>8)&((1<<at91sam7_info->num_nvmbits)-1);
 867
 868         return ERROR_OK;
 869 }