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   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_auto_probe(struct flash_bank_s *bank);
  61 int at91sam7_erase_check(struct flash_bank_s *bank);
  62 int at91sam7_protect_check(struct flash_bank_s *bank);
  63 int at91sam7_info(struct flash_bank_s *bank, char *buf, int buf_size);
  64
  65 u32 at91sam7_get_flash_status(flash_bank_t *bank, u8 flashplane);
  66 void at91sam7_set_flash_mode(flash_bank_t *bank, u8 flashplane, int mode);
  67 u32 at91sam7_wait_status_busy(flash_bank_t *bank, u8 flashplane, u32 waitbits, int timeout);
  68 int at91sam7_flash_command(struct flash_bank_s *bank, u8 flashplane, u8 cmd, u16 pagen);
  69 int at91sam7_handle_gpnvm_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
  70
  71 flash_driver_t at91sam7_flash =
  72 {
  73         .name = "at91sam7",
  74         .register_commands = at91sam7_register_commands,
  75         .flash_bank_command = at91sam7_flash_bank_command,
  76         .erase = at91sam7_erase,
  77         .protect = at91sam7_protect,
  78         .write = at91sam7_write,
  79         .probe = at91sam7_probe,
  80         .auto_probe = at91sam7_probe,
  81         .erase_check = at91sam7_erase_check,
  82         .protect_check = at91sam7_protect_check,
  83         .info = at91sam7_info
  84 };
  85
  86 u32 MC_FMR[4] = { 0xFFFFFF60, 0xFFFFFF70, 0xFFFFFF80, 0xFFFFFF90 };
  87 u32 MC_FCR[4] = { 0xFFFFFF64, 0xFFFFFF74, 0xFFFFFF84, 0xFFFFFF94 };
  88 u32 MC_FSR[4] = { 0xFFFFFF68, 0xFFFFFF78, 0xFFFFFF88, 0xFFFFFF98 };
  89
  90 char * EPROC[8]= {"Unknown","ARM946-E","ARM7TDMI","Unknown","ARM920T","ARM926EJ-S","Unknown","Unknown"};
  91 long NVPSIZ[16] = {
  92    0,
  93    0x2000, /*  8K */
  94    0x4000, /* 16K */
  95    0x8000, /* 32K */
  96    -1,
  97    0x10000, /* 64K */
  98    -1,
  99    0x20000, /* 128K */
 100    -1,
 101    0x40000, /* 256K */
 102    0x80000, /* 512K */
 103    -1,
 104    0x100000, /* 1024K */
 105    -1,
 106    0x200000, /* 2048K */
 107    -1
 108 };
 109
 110 long SRAMSIZ[16] = {
 111    -1,
 112    0x0400, /*  1K */
 113    0x0800, /*  2K */
 114    -1,
 115    0x1c000,  /* 112K */
 116    0x1000,  /*   4K */
 117    0x14000, /*  80K */
 118    0x28000, /* 160K */
 119    0x2000,  /*   8K */
 120    0x4000,  /*  16K */
 121    0x8000,  /*  32K */
 122    0x10000, /*  64K */
 123    0x20000, /* 128K */
 124    0x40000, /* 256K */
 125    0x18000, /* 96K */
 126    0x80000, /* 512K */
 127 };
 128
 129 int at91sam7_register_commands(struct command_context_s *cmd_ctx)
 130 {
 131         command_t *at91sam7_cmd = register_command(cmd_ctx, NULL, "at91sam7", NULL, COMMAND_ANY, NULL);
 132         register_command(cmd_ctx, at91sam7_cmd, "gpnvm", at91sam7_handle_gpnvm_command, COMMAND_EXEC,
 133                         "at91sam7 gpnvm <num> <bit> set|clear, set or clear at91sam7 gpnvm bit");
 134
 135         return ERROR_OK;
 136 }
 137
 138 u32 at91sam7_get_flash_status(flash_bank_t *bank, u8 flashplane)
 139 {
 140         target_t *target = bank->target;
 141         u32 fsr;
 142
 143         target_read_u32(target, MC_FSR[flashplane], &fsr);
 144
 145         return fsr;
 146 }
 147
 148 /* Read clock configuration and set at91sam7_info->usec_clocks*/
 149 void at91sam7_read_clock_info(flash_bank_t *bank)
 150 {
 151         at91sam7_flash_bank_t *at91sam7_info = bank->driver_priv;
 152         target_t *target = bank->target;
 153         u32 mckr, mcfr, pllr;
 154         unsigned long tmp = 0, mainfreq;
 155         int flashplane;
 156
 157         /* Read main clock freqency register */
 158         target_read_u32(target, CKGR_MCFR, &mcfr);
 159         /* Read master clock register */
 160         target_read_u32(target, PMC_MCKR, &mckr);
 161         /* Read Clock Generator PLL Register  */
 162         target_read_u32(target, CKGR_PLLR, &pllr);
 163
 164         at91sam7_info->mck_valid = 0;
 165         switch (mckr & PMC_MCKR_CSS)
 166         {
 167                 case 0:                 /* Slow Clock */
 168                         at91sam7_info->mck_valid = 1;
 169                         mainfreq = RC_FREQ / 16ul * (mcfr & 0xffff);
 170                         tmp = mainfreq;
 171                         break;
 172                 case 1:                 /* Main Clock */
 173                         if (mcfr & CKGR_MCFR_MAINRDY)
 174                         {
 175                                 at91sam7_info->mck_valid = 1;
 176                                 mainfreq = RC_FREQ / 16ul * (mcfr & 0xffff);
 177                                 tmp = mainfreq;
 178                         }
 179                         break;
 180
 181                 case 2:                 /* Reserved */
 182                         break;
 183                 case 3:                 /* PLL Clock */
 184                         if (mcfr & CKGR_MCFR_MAINRDY)
 185                         {
 186                                 target_read_u32(target, CKGR_PLLR, &pllr);
 187                                 if (!(pllr & CKGR_PLLR_DIV))
 188                                         break; /* 0 Hz */
 189                                 at91sam7_info->mck_valid = 1;
 190                                 mainfreq = RC_FREQ / 16ul * (mcfr & 0xffff);
 191                                 /* Integer arithmetic should have sufficient precision
 192                                    as long as PLL is properly configured. */
 193                                 tmp = mainfreq / (pllr & CKGR_PLLR_DIV) *
 194                                   (((pllr & CKGR_PLLR_MUL) >> 16) + 1);
 195                         }
 196                         break;
 197         }
 198
 199         /* Prescaler adjust */
 200         if (((mckr & PMC_MCKR_PRES) >> 2) == 7)
 201                 at91sam7_info->mck_valid = 0;
 202         else
 203                 at91sam7_info->mck_freq = tmp >> ((mckr & PMC_MCKR_PRES) >> 2);
 204
 205         /* Forget old flash timing */
 206         for (flashplane = 0; flashplane<at91sam7_info->num_planes; flashplane++)
 207         {
 208                 at91sam7_set_flash_mode(bank, flashplane, FMR_TIMING_NONE);
 209         }
 210 }
 211
 212 /* Setup the timimg registers for nvbits or normal flash */
 213 void at91sam7_set_flash_mode(flash_bank_t *bank, u8 flashplane, int mode)
 214 {
 215         u32 fmr, fmcn = 0, fws = 0;
 216         at91sam7_flash_bank_t *at91sam7_info = bank->driver_priv;
 217         target_t *target = bank->target;
 218
 219         if (mode && (mode != at91sam7_info->flashmode[flashplane]))
 220         {
 221                 /* Always round up (ceil) */
 222                 if (mode==FMR_TIMING_NVBITS)
 223                 {
 224                         if (at91sam7_info->cidr_arch == 0x60)
 225                         {
 226                                 /* AT91SAM7A3 uses master clocks in 100 ns */
 227                                 fmcn = (at91sam7_info->mck_freq/10000000ul)+1;
 228                         }
 229                         else
 230                         {
 231                                 /* master clocks in 1uS for ARCH 0x7 types */
 232                                 fmcn = (at91sam7_info->mck_freq/1000000ul)+1;
 233                         }
 234                 }
 235                 else if (mode==FMR_TIMING_FLASH)
 236                         /* main clocks in 1.5uS */
 237                         fmcn = (at91sam7_info->mck_freq/666666ul)+1;
 238
 239                 /* Only allow fmcn=0 if clock period is > 30 us = 33kHz. */
 240                 if (at91sam7_info->mck_freq <= 33333ul)
 241                         fmcn = 0;
 242                 /* Only allow fws=0 if clock frequency is < 30 MHz. */
 243                 if (at91sam7_info->mck_freq > 30000000ul)
 244                         fws = 1;
 245
 246                 LOG_DEBUG("fmcn[%i]: %i", flashplane, fmcn);
 247                 fmr = fmcn << 16 | fws << 8;
 248                 target_write_u32(target, MC_FMR[flashplane], fmr);
 249         }
 250
 251         at91sam7_info->flashmode[flashplane] = mode;
 252 }
 253
 254 u32 at91sam7_wait_status_busy(flash_bank_t *bank, u8 flashplane, u32 waitbits, int timeout)
 255 {
 256         u32 status;
 257
 258         while ((!((status = at91sam7_get_flash_status(bank,flashplane)) & waitbits)) && (timeout-- > 0))
 259         {
 260                 LOG_DEBUG("status[%i]: 0x%x", flashplane, status);
 261                 alive_sleep(1);
 262         }
 263
 264         LOG_DEBUG("status[%i]: 0x%x", flashplane, status);
 265
 266         if (status & 0x0C)
 267         {
 268                 LOG_ERROR("status register: 0x%x", status);
 269                 if (status & 0x4)
 270                         LOG_ERROR("Lock Error Bit Detected, Operation Abort");
 271                 if (status & 0x8)
 272                         LOG_ERROR("Invalid command and/or bad keyword, Operation Abort");
 273                 if (status & 0x10)
 274                         LOG_ERROR("Security Bit Set, Operation Abort");
 275         }
 276
 277         return status;
 278 }
 279
 280
 281 /* Send one command to the AT91SAM flash controller */
 282 int at91sam7_flash_command(struct flash_bank_s *bank, u8 flashplane, u8 cmd, u16 pagen)
 283 {
 284         u32 fcr;
 285         at91sam7_flash_bank_t *at91sam7_info = bank->driver_priv;
 286         target_t *target = bank->target;
 287
 288         fcr = (0x5A<<24) | ((pagen&0x3FF)<<8) | cmd;
 289         target_write_u32(target, MC_FCR[flashplane], fcr);
 290         LOG_DEBUG("Flash command: 0x%x, flashplane: %i, pagenumber:%u", fcr, flashplane, pagen);
 291
 292         if ((at91sam7_info->cidr_arch == 0x60)&&((cmd==SLB)|(cmd==CLB)))
 293         {
 294                 /* Lock bit manipulation on AT91SAM7A3 waits for FC_FSR bit 1, EOL */
 295                 if (at91sam7_wait_status_busy(bank, flashplane, MC_FSR_EOL, 10)&0x0C)
 296                 {
 297                         return ERROR_FLASH_OPERATION_FAILED;
 298                 }
 299                 return ERROR_OK;
 300         }
 301
 302         if (at91sam7_wait_status_busy(bank, flashplane, MC_FSR_FRDY, 10)&0x0C)
 303         {
 304                 return ERROR_FLASH_OPERATION_FAILED;
 305         }
 306         return ERROR_OK;
 307 }
 308
 309 /* Read device id register, main clock frequency register and fill in driver info structure */
 310 int at91sam7_read_part_info(struct flash_bank_s *bank)
 311 {
 312         at91sam7_flash_bank_t *at91sam7_info = bank->driver_priv;
 313         target_t *target = bank->target;
 314         u32 cidr, status;
 315         int sectornum;
 316
 317         if (at91sam7_info->cidr != 0)
 318                 return ERROR_OK; /* already probed, multiple probes may cause memory leak, not allowed */
 319
 320         /* Read and parse chip identification register */
 321         target_read_u32(target, DBGU_CIDR, &cidr);
 322
 323         if (cidr == 0)
 324         {
 325                 LOG_WARNING("Cannot identify target as an AT91SAM");
 326                 return ERROR_FLASH_OPERATION_FAILED;
 327         }
 328
 329         at91sam7_info->cidr = cidr;
 330         at91sam7_info->cidr_ext = (cidr>>31)&0x0001;
 331         at91sam7_info->cidr_nvptyp = (cidr>>28)&0x0007;
 332         at91sam7_info->cidr_arch = (cidr>>20)&0x00FF;
 333         at91sam7_info->cidr_sramsiz = (cidr>>16)&0x000F;
 334         at91sam7_info->cidr_nvpsiz2 = (cidr>>12)&0x000F;
 335         at91sam7_info->cidr_nvpsiz = (cidr>>8)&0x000F;
 336         at91sam7_info->cidr_eproc = (cidr>>5)&0x0007;
 337         at91sam7_info->cidr_version = cidr&0x001F;
 338         bank->size = NVPSIZ[at91sam7_info->cidr_nvpsiz];
 339         at91sam7_info->target_name = "Unknown";
 340
 341         /* Support just for bulk erase of a single flash plane, whole device if flash size <= 256k */
 342         if (NVPSIZ[at91sam7_info->cidr_nvpsiz]<0x80000)  /* Flash size less than 512K, one flash plane */
 343         {
 344                 bank->num_sectors = 1;
 345                 bank->sectors = malloc(sizeof(flash_sector_t));
 346                 bank->sectors[0].offset = 0;
 347                 bank->sectors[0].size = bank->size;
 348                 bank->sectors[0].is_erased = -1;
 349                 bank->sectors[0].is_protected = -1;
 350         }
 351         else    /* Flash size 512K or larger, several flash planes */
 352         {
 353                 bank->num_sectors = NVPSIZ[at91sam7_info->cidr_nvpsiz]/0x40000;
 354                 bank->sectors = malloc(bank->num_sectors*sizeof(flash_sector_t));
 355                 for (sectornum=0; sectornum<bank->num_sectors; sectornum++)
 356                 {
 357                         bank->sectors[sectornum].offset = sectornum*0x40000;
 358                         bank->sectors[sectornum].size = 0x40000;
 359                         bank->sectors[sectornum].is_erased = -1;
 360                         bank->sectors[sectornum].is_protected = -1;
 361                 }
 362         }
 363
 364
 365
 366         LOG_DEBUG("nvptyp: 0x%3.3x, arch: 0x%4.4x", at91sam7_info->cidr_nvptyp, at91sam7_info->cidr_arch );
 367
 368         /* Read main and master clock freqency register */
 369         at91sam7_read_clock_info(bank);
 370
 371         at91sam7_info->num_planes = 1;
 372         status = at91sam7_get_flash_status(bank, 0);
 373         at91sam7_info->securitybit = (status>>4)&0x01;
 374         at91sam7_protect_check(bank);   /* TODO Check the protect check */
 375
 376         if (at91sam7_info->cidr_arch == 0x70 )
 377         {
 378                 at91sam7_info->num_nvmbits = 2;
 379                 at91sam7_info->nvmbits = (status>>8)&0x03;
 380                 bank->base = 0x100000;
 381                 bank->bus_width = 4;
 382                 if (bank->size==0x80000)  /* AT91SAM7S512 */
 383                 {
 384                         at91sam7_info->target_name = "AT91SAM7S512";
 385                         at91sam7_info->num_planes = 2;
 386                         if (at91sam7_info->num_planes != bank->num_sectors)
 387                                 LOG_WARNING("Internal error: Number of flash planes and erase sectors does not match, please report");;
 388                         at91sam7_info->num_lockbits = 2*16;
 389                         at91sam7_info->pagesize = 256;
 390                         at91sam7_info->pages_in_lockregion = 64;
 391                         at91sam7_info->num_pages = 2*16*64;
 392                 }
 393                 if (bank->size==0x40000)  /* AT91SAM7S256 */
 394                 {
 395                         at91sam7_info->target_name = "AT91SAM7S256";
 396                         at91sam7_info->num_lockbits = 16;
 397                         at91sam7_info->pagesize = 256;
 398                         at91sam7_info->pages_in_lockregion = 64;
 399                         at91sam7_info->num_pages = 16*64;
 400                 }
 401                 if (bank->size==0x20000)  /* AT91SAM7S128 */
 402                 {
 403                         at91sam7_info->target_name = "AT91SAM7S128";
 404                         at91sam7_info->num_lockbits = 8;
 405                         at91sam7_info->pagesize = 256;
 406                         at91sam7_info->pages_in_lockregion = 64;
 407                         at91sam7_info->num_pages = 8*64;
 408                 }
 409                 if (bank->size==0x10000)  /* AT91SAM7S64 */
 410                 {
 411                         at91sam7_info->target_name = "AT91SAM7S64";
 412                         at91sam7_info->num_lockbits = 16;
 413                         at91sam7_info->pagesize = 128;
 414                         at91sam7_info->pages_in_lockregion = 32;
 415                         at91sam7_info->num_pages = 16*32;
 416                 }
 417                 if (bank->size==0x08000)  /* AT91SAM7S321/32 */
 418                 {
 419                         at91sam7_info->target_name = "AT91SAM7S321/32";
 420                         at91sam7_info->num_lockbits = 8;
 421                         at91sam7_info->pagesize = 128;
 422                         at91sam7_info->pages_in_lockregion = 32;
 423                         at91sam7_info->num_pages = 8*32;
 424                 }
 425
 426                 return ERROR_OK;
 427         }
 428
 429         if (at91sam7_info->cidr_arch == 0x71 )
 430         {
 431                 at91sam7_info->num_nvmbits = 3;
 432                 at91sam7_info->nvmbits = (status>>8)&0x07;
 433                 bank->base = 0x100000;
 434                 bank->bus_width = 4;
 435                 if (bank->size==0x80000)  /* AT91SAM7XC512 */
 436                 {
 437                         at91sam7_info->target_name = "AT91SAM7XC512";
 438                         at91sam7_info->num_planes = 2;
 439                         if (at91sam7_info->num_planes != bank->num_sectors)
 440                                 LOG_WARNING("Internal error: Number of flash planes and erase sectors does not match, please report");;
 441                         at91sam7_info->num_lockbits = 2*16;
 442                         at91sam7_info->pagesize = 256;
 443                         at91sam7_info->pages_in_lockregion = 64;
 444                         at91sam7_info->num_pages = 2*16*64;
 445                 }
 446                 if (bank->size==0x40000)  /* AT91SAM7XC256 */
 447                 {
 448                         at91sam7_info->target_name = "AT91SAM7XC256";
 449                         at91sam7_info->num_lockbits = 16;
 450                         at91sam7_info->pagesize = 256;
 451                         at91sam7_info->pages_in_lockregion = 64;
 452                         at91sam7_info->num_pages = 16*64;
 453                 }
 454                 if (bank->size==0x20000)  /* AT91SAM7XC128 */
 455                 {
 456                         at91sam7_info->target_name = "AT91SAM7XC128";
 457                         at91sam7_info->num_lockbits = 8;
 458                         at91sam7_info->pagesize = 256;
 459                         at91sam7_info->pages_in_lockregion = 64;
 460                         at91sam7_info->num_pages = 8*64;
 461                 }
 462
 463                 return ERROR_OK;
 464         }
 465
 466         if (at91sam7_info->cidr_arch == 0x72 )
 467         {
 468                 at91sam7_info->num_nvmbits = 3;
 469                 at91sam7_info->nvmbits = (status>>8)&0x07;
 470                 bank->base = 0x100000;
 471                 bank->bus_width = 4;
 472                 if (bank->size==0x80000) /* AT91SAM7SE512 */
 473                 {
 474                         at91sam7_info->target_name = "AT91SAM7SE512";
 475                         at91sam7_info->num_planes = 2;
 476                         if (at91sam7_info->num_planes != bank->num_sectors)
 477                                 LOG_WARNING("Internal error: Number of flash planes and erase sectors does not match, please report");;
 478                         at91sam7_info->num_lockbits = 32;
 479                         at91sam7_info->pagesize = 256;
 480                         at91sam7_info->pages_in_lockregion = 64;
 481                         at91sam7_info->num_pages = 32*64;
 482                 }
 483                 if (bank->size==0x40000)
 484                 {
 485                         at91sam7_info->target_name = "AT91SAM7SE256";
 486                         at91sam7_info->num_lockbits = 16;
 487                         at91sam7_info->pagesize = 256;
 488                         at91sam7_info->pages_in_lockregion = 64;
 489                         at91sam7_info->num_pages = 16*64;
 490                 }
 491                 if (bank->size==0x08000)
 492                 {
 493                         at91sam7_info->target_name = "AT91SAM7SE32";
 494                         at91sam7_info->num_lockbits = 8;
 495                         at91sam7_info->pagesize = 128;
 496                         at91sam7_info->pages_in_lockregion = 32;
 497                         at91sam7_info->num_pages = 8*32;
 498                 }
 499
 500                 return ERROR_OK;
 501         }
 502
 503         if (at91sam7_info->cidr_arch == 0x75 )
 504         {
 505                 at91sam7_info->num_nvmbits = 3;
 506                 at91sam7_info->nvmbits = (status>>8)&0x07;
 507                 bank->base = 0x100000;
 508                 bank->bus_width = 4;
 509                 if (bank->size==0x80000)  /* AT91SAM7X512 */
 510                 {
 511                         at91sam7_info->target_name = "AT91SAM7X512";
 512                         at91sam7_info->num_planes = 2;
 513                         if (at91sam7_info->num_planes != bank->num_sectors)
 514                                 LOG_WARNING("Internal error: Number of flash planes and erase sectors does not match, please report");;
 515                         at91sam7_info->num_lockbits = 32;
 516                         at91sam7_info->pagesize = 256;
 517                         at91sam7_info->pages_in_lockregion = 64;
 518                         at91sam7_info->num_pages = 2*16*64;
 519                         LOG_DEBUG("Support for AT91SAM7X512 is experimental in this version!");
 520                 }
 521                 if (bank->size==0x40000)  /* AT91SAM7X256 */
 522                 {
 523                         at91sam7_info->target_name = "AT91SAM7X256";
 524                         at91sam7_info->num_lockbits = 16;
 525                         at91sam7_info->pagesize = 256;
 526                         at91sam7_info->pages_in_lockregion = 64;
 527                         at91sam7_info->num_pages = 16*64;
 528                 }
 529                 if (bank->size==0x20000)  /* AT91SAM7X128 */
 530                 {
 531                         at91sam7_info->target_name = "AT91SAM7X128";
 532                         at91sam7_info->num_lockbits = 8;
 533                         at91sam7_info->pagesize = 256;
 534                         at91sam7_info->pages_in_lockregion = 64;
 535                         at91sam7_info->num_pages = 8*64;
 536                 }
 537
 538                 return ERROR_OK;
 539         }
 540
 541         if (at91sam7_info->cidr_arch == 0x60 )
 542         {
 543                 at91sam7_info->num_nvmbits = 3;
 544                 at91sam7_info->nvmbits = (status>>8)&0x07;
 545                 bank->base = 0x100000;
 546                 bank->bus_width = 4;
 547
 548                 if (bank->size == 0x40000)  /* AT91SAM7A3 */
 549                 {
 550                         at91sam7_info->target_name = "AT91SAM7A3";
 551                         at91sam7_info->num_lockbits = 16;
 552                         at91sam7_info->pagesize = 256;
 553                         at91sam7_info->pages_in_lockregion = 16;
 554                         at91sam7_info->num_pages = 16*64;
 555                 }
 556                 return ERROR_OK;
 557         }
 558
 559         LOG_WARNING("at91sam7 flash only tested for AT91SAM7Sxx series");
 560         return ERROR_OK;
 561 }
 562
 563 int at91sam7_erase_check(struct flash_bank_s *bank)
 564 {
 565         at91sam7_flash_bank_t *at91sam7_info = bank->driver_priv;
 566
 567         if (!at91sam7_info->working_area_size)
 568         {
 569         }
 570         else
 571         {
 572         }
 573
 574         return ERROR_OK;
 575 }
 576
 577 int at91sam7_protect_check(struct flash_bank_s *bank)
 578 {
 579         u32 status;
 580         int flashplane;
 581
 582         at91sam7_flash_bank_t *at91sam7_info = bank->driver_priv;
 583
 584         if (at91sam7_info->cidr == 0)
 585         {
 586                 return ERROR_FLASH_BANK_NOT_PROBED;
 587         }
 588
 589         if (bank->target->state != TARGET_HALTED)
 590         {
 591                 LOG_ERROR("Target not halted");
 592                 return ERROR_TARGET_NOT_HALTED;
 593         }
 594
 595         for (flashplane=0;flashplane<at91sam7_info->num_planes;flashplane++)
 596         {
 597                 status = at91sam7_get_flash_status(bank, flashplane);
 598                 at91sam7_info->lockbits[flashplane] = (status >> 16);
 599         }
 600
 601         return ERROR_OK;
 602 }
 603
 604 /* flash_bank at91sam7 0 0 0 0 <target#>
 605  */
 606 int at91sam7_flash_bank_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc, struct flash_bank_s *bank)
 607 {
 608         at91sam7_flash_bank_t *at91sam7_info;
 609         int i;
 610
 611         if (argc < 6)
 612         {
 613                 LOG_WARNING("incomplete flash_bank at91sam7 configuration");
 614                 return ERROR_FLASH_BANK_INVALID;
 615         }
 616
 617         at91sam7_info = malloc(sizeof(at91sam7_flash_bank_t));
 618         bank->driver_priv = at91sam7_info;
 619
 620         /* part wasn't probed for info yet */
 621         at91sam7_info->cidr = 0;
 622         for (i=0;i<4;i++)
 623                 at91sam7_info->flashmode[i]=0;
 624
 625         return ERROR_OK;
 626 }
 627
 628 int at91sam7_erase(struct flash_bank_s *bank, int first, int last)
 629 {
 630         at91sam7_flash_bank_t *at91sam7_info = bank->driver_priv;
 631         u8 flashplane;
 632
 633         if (at91sam7_info->cidr == 0)
 634         {
 635                 return ERROR_FLASH_BANK_NOT_PROBED;
 636         }
 637
 638         if (bank->target->state != TARGET_HALTED)
 639         {
 640                 LOG_ERROR("Target not halted");
 641                 return ERROR_TARGET_NOT_HALTED;
 642         }
 643
 644         if ((first < 0) || (last < first) || (last >= bank->num_sectors))
 645         {
 646                 if ((first == 0) && (last == (at91sam7_info->num_lockbits-1)))
 647                 {
 648                         LOG_WARNING("Sector numbers based on lockbit count, probably a deprecated script");
 649                         last = bank->num_sectors-1;
 650                 }
 651                 else return ERROR_FLASH_SECTOR_INVALID;
 652         }
 653
 654         /* Configure the flash controller timing */
 655         at91sam7_read_clock_info(bank);
 656         for (flashplane = first; flashplane<=last; flashplane++)
 657         {
 658                 /* Configure the flash controller timing */
 659                 at91sam7_set_flash_mode(bank, flashplane, FMR_TIMING_FLASH);
 660                 if (at91sam7_flash_command(bank, flashplane, EA, 0) != ERROR_OK)
 661                 {
 662                         return ERROR_FLASH_OPERATION_FAILED;
 663                 }
 664         }
 665         return ERROR_OK;
 666
 667 }
 668
 669 int at91sam7_protect(struct flash_bank_s *bank, int set, int first, int last)
 670 {
 671         u32 cmd, pagen;
 672         u8 flashplane;
 673         int lockregion;
 674
 675         at91sam7_flash_bank_t *at91sam7_info = bank->driver_priv;
 676
 677         if (at91sam7_info->cidr == 0)
 678         {
 679                 return ERROR_FLASH_BANK_NOT_PROBED;
 680         }
 681
 682         if (bank->target->state != TARGET_HALTED)
 683         {
 684                 LOG_ERROR("Target not halted");
 685                 return ERROR_TARGET_NOT_HALTED;
 686         }
 687
 688         if ((first < 0) || (last < first) || (last >= at91sam7_info->num_lockbits))
 689         {
 690                 return ERROR_FLASH_SECTOR_INVALID;
 691         }
 692
 693         at91sam7_read_clock_info(bank);
 694
 695         for (lockregion=first;lockregion<=last;lockregion++)
 696         {
 697                 pagen = lockregion*at91sam7_info->pages_in_lockregion;
 698                 flashplane = (pagen>>10)&0x03;
 699                 /* Configure the flash controller timing */
 700                 at91sam7_set_flash_mode(bank, flashplane, FMR_TIMING_NVBITS);
 701
 702                 if (set)
 703                          cmd = SLB;
 704                 else
 705                          cmd = CLB;
 706
 707                 if (at91sam7_flash_command(bank, flashplane, cmd, pagen) != ERROR_OK)
 708                 {
 709                         return ERROR_FLASH_OPERATION_FAILED;
 710                 }
 711         }
 712
 713         at91sam7_protect_check(bank);
 714
 715         return ERROR_OK;
 716 }
 717
 718
 719 int at91sam7_write(struct flash_bank_s *bank, u8 *buffer, u32 offset, u32 count)
 720 {
 721         at91sam7_flash_bank_t *at91sam7_info = bank->driver_priv;
 722         target_t *target = bank->target;
 723         u32 dst_min_alignment, wcount, bytes_remaining = count;
 724         u32 first_page, last_page, pagen, buffer_pos;
 725         u8 flashplane;
 726
 727         if (at91sam7_info->cidr == 0)
 728         {
 729                 return ERROR_FLASH_BANK_NOT_PROBED;
 730         }
 731
 732         if (bank->target->state != TARGET_HALTED)
 733         {
 734                 LOG_ERROR("Target not halted");
 735                 return ERROR_TARGET_NOT_HALTED;
 736         }
 737
 738         if (offset + count > bank->size)
 739                 return ERROR_FLASH_DST_OUT_OF_BANK;
 740
 741         dst_min_alignment = at91sam7_info->pagesize;
 742
 743         if (offset % dst_min_alignment)
 744         {
 745                 LOG_WARNING("offset 0x%x breaks required alignment 0x%x", offset, dst_min_alignment);
 746                 return ERROR_FLASH_DST_BREAKS_ALIGNMENT;
 747         }
 748
 749         if (at91sam7_info->cidr_arch == 0)
 750                 return ERROR_FLASH_BANK_NOT_PROBED;
 751
 752         first_page = offset/dst_min_alignment;
 753         last_page = CEIL(offset + count, dst_min_alignment);
 754
 755         LOG_DEBUG("first_page: %i, last_page: %i, count %i", first_page, last_page, count);
 756
 757         at91sam7_read_clock_info(bank);
 758
 759         for (pagen=first_page; pagen<last_page; pagen++)
 760         {
 761                 if (bytes_remaining<dst_min_alignment)
 762                         count = bytes_remaining;
 763                 else
 764                         count = dst_min_alignment;
 765                 bytes_remaining -= count;
 766
 767                 /* Write one block to the PageWriteBuffer */
 768                 buffer_pos = (pagen-first_page)*dst_min_alignment;
 769                 wcount = CEIL(count,4);
 770                 target->type->write_memory(target, bank->base+pagen*dst_min_alignment, 4, wcount, buffer+buffer_pos);
 771                 flashplane = (pagen>>10)&0x3;
 772
 773                 /* Configure the flash controller timing */
 774                 at91sam7_set_flash_mode(bank, flashplane, FMR_TIMING_FLASH);
 775                 /* Send Write Page command to Flash Controller */
 776                 if (at91sam7_flash_command(bank, flashplane, WP, pagen) != ERROR_OK)
 777                 {
 778                                 return ERROR_FLASH_OPERATION_FAILED;
 779                 }
 780                 LOG_DEBUG("Write flash plane:%i page number:%i", flashplane, pagen);
 781         }
 782
 783         return ERROR_OK;
 784 }
 785
 786
 787 int at91sam7_probe(struct flash_bank_s *bank)
 788 {
 789         /* we can't probe on an at91sam7
 790          * if this is an at91sam7, it has the configured flash
 791          */
 792         at91sam7_flash_bank_t *at91sam7_info = bank->driver_priv;
 793         int retval;
 794
 795         if (at91sam7_info->cidr != 0)
 796         {
 797                 return ERROR_OK; /* already probed */
 798         }
 799
 800         if (bank->target->state != TARGET_HALTED)
 801         {
 802                 LOG_ERROR("Target not halted");
 803                 return ERROR_TARGET_NOT_HALTED;
 804         }
 805
 806         retval = at91sam7_read_part_info(bank);
 807         if (retval != ERROR_OK)
 808                 return retval;
 809
 810         return ERROR_OK;
 811 }
 812
 813
 814 int at91sam7_info(struct flash_bank_s *bank, char *buf, int buf_size)
 815 {
 816         int printed, flashplane;
 817         at91sam7_flash_bank_t *at91sam7_info = bank->driver_priv;
 818
 819         if (at91sam7_info->cidr == 0)
 820         {
 821                 return ERROR_FLASH_BANK_NOT_PROBED;
 822         }
 823
 824         printed = snprintf(buf, buf_size, "\nat91sam7 information: Chip is %s\n",at91sam7_info->target_name);
 825         buf += printed;
 826         buf_size -= printed;
 827
 828         printed = snprintf(buf, buf_size, "cidr: 0x%8.8x, arch: 0x%4.4x, eproc: %s, version:0x%3.3x,  flashsize: 0x%8.8x\n",
 829                   at91sam7_info->cidr, at91sam7_info->cidr_arch, EPROC[at91sam7_info->cidr_eproc], at91sam7_info->cidr_version, bank->size);
 830         buf += printed;
 831         buf_size -= printed;
 832
 833         printed = snprintf(buf, buf_size, "master clock(estimated): %ikHz \n", at91sam7_info->mck_freq / 1000);
 834         buf += printed;
 835         buf_size -= printed;
 836
 837         if (at91sam7_info->num_planes>1) {
 838                 printed = snprintf(buf, buf_size, "flashplanes: %i, pagesize: %i, lock regions: %i, pages in lock region: %i \n",
 839                            at91sam7_info->num_planes, at91sam7_info->pagesize, at91sam7_info->num_lockbits, at91sam7_info->num_pages/at91sam7_info->num_lockbits);
 840                 buf += printed;
 841                 buf_size -= printed;
 842                 for (flashplane=0; flashplane<at91sam7_info->num_planes; flashplane++)
 843                 {
 844                         printed = snprintf(buf, buf_size, "lockbits[%i]: 0x%4.4x,  ", flashplane, at91sam7_info->lockbits[flashplane]);
 845                         buf += printed;
 846                         buf_size -= printed;
 847                 }
 848         }
 849         else
 850         if (at91sam7_info->num_lockbits>0) {
 851                 printed = snprintf(buf, buf_size, "pagesize: %i, lockbits: %i 0x%4.4x, pages in lock region: %i \n",
 852                            at91sam7_info->pagesize, at91sam7_info->num_lockbits, at91sam7_info->lockbits[0], at91sam7_info->num_pages/at91sam7_info->num_lockbits);
 853                 buf += printed;
 854                 buf_size -= printed;
 855         }
 856
 857         printed = snprintf(buf, buf_size, "securitybit: %i,  nvmbits(%i): 0x%1.1x\n", at91sam7_info->securitybit, at91sam7_info->num_nvmbits, at91sam7_info->nvmbits);
 858         buf += printed;
 859         buf_size -= printed;
 860
 861         return ERROR_OK;
 862 }
 863
 864 /*
 865 * On AT91SAM7S: When the gpnvm bits are set with
 866 * > at91sam7 gpnvm 0 bitnr set
 867 * the changes are not visible in the flash controller status register MC_FSR
 868 * until the processor has been reset.
 869 * On the Olimex board this requires a power cycle.
 870 * Note that the AT91SAM7S has the following errata (doc6175.pdf sec 14.1.3):
 871 *       The maximum number of write/erase cycles for Non Volatile Memory bits is 100. This includes
 872 *       Lock Bits (LOCKx), General Purpose NVM bits (GPNVMx) and the Security Bit.
 873 */
 874 int at91sam7_handle_gpnvm_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
 875 {
 876         flash_bank_t *bank;
 877         int bit;
 878         u8  flashcmd;
 879         u32 status;
 880         char *value;
 881         at91sam7_flash_bank_t *at91sam7_info;
 882         int retval;
 883
 884         if (argc < 3)
 885         {
 886                 command_print(cmd_ctx, "at91sam7 gpnvm <num> <bit> <set|clear>");
 887                 return ERROR_OK;
 888         }
 889
 890         bank = get_flash_bank_by_num_noprobe(strtoul(args[0], NULL, 0));
 891         bit = atoi(args[1]);
 892         value = args[2];
 893
 894         if (bank ==  NULL)
 895         {
 896                 return ERROR_FLASH_BANK_INVALID;
 897         }
 898
 899         if (bank->driver != &at91sam7_flash)
 900         {
 901                 command_print(cmd_ctx, "not an at91sam7 flash bank '%s'", args[0]);
 902                 return ERROR_FLASH_BANK_INVALID;
 903         }
 904
 905         if (strcmp(value, "set") == 0)
 906         {
 907                 flashcmd = SGPB;
 908         }
 909         else if (strcmp(value, "clear") == 0)
 910         {
 911                 flashcmd = CGPB;
 912         }
 913         else
 914         {
 915                 return ERROR_COMMAND_SYNTAX_ERROR;
 916         }
 917
 918         at91sam7_info = bank->driver_priv;
 919
 920         if (bank->target->state != TARGET_HALTED)
 921         {
 922                 LOG_ERROR("target has to be halted to perform flash operation");
 923                 return ERROR_TARGET_NOT_HALTED;
 924         }
 925
 926         if (at91sam7_info->cidr == 0)
 927         {
 928                 retval = at91sam7_read_part_info(bank);
 929                 if (retval != ERROR_OK) {
 930                         return retval;
 931                 }
 932         }
 933
 934         if ((bit<0) || (at91sam7_info->num_nvmbits <= bit))
 935         {
 936                 command_print(cmd_ctx, "gpnvm bit '#%s' is out of bounds for target %s", args[1],at91sam7_info->target_name);
 937                 return ERROR_OK;
 938         }
 939
 940         /* Configure the flash controller timing */
 941         at91sam7_read_clock_info(bank);
 942         at91sam7_set_flash_mode(bank, 0, FMR_TIMING_NVBITS);
 943
 944         if (at91sam7_flash_command(bank, 0, flashcmd, (u16)(bit)) != ERROR_OK)
 945         {
 946                 return ERROR_FLASH_OPERATION_FAILED;
 947         }
 948
 949         status = at91sam7_get_flash_status(bank, 0);
 950         LOG_DEBUG("at91sam7_handle_gpnvm_command: cmd 0x%x, value 0x%x, status 0x%x \n",flashcmd,bit,status);
 951         at91sam7_info->nvmbits = (status>>8)&((1<<at91sam7_info->num_nvmbits)-1);
 952
 953         return ERROR_OK;
 954 }