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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 * STELLARIS is tested on LM3S811
  23 ***************************************************************************/
  24 #ifdef HAVE_CONFIG_H
  25 #include "config.h"
  26 #endif
  27
  28 #include "replacements.h"
  29
  30 #include "stellaris.h"
  31 #include "cortex_m3.h"
  32
  33 #include "flash.h"
  34 #include "target.h"
  35 #include "log.h"
  36 #include "binarybuffer.h"
  37 #include "types.h"
  38
  39 #include <stdlib.h>
  40 #include <string.h>
  41 #include <unistd.h>
  42
  43 #define DID0_VER(did0) ((did0>>28)&0x07)
  44 int stellaris_register_commands(struct command_context_s *cmd_ctx);
  45 int stellaris_flash_bank_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc, struct flash_bank_s *bank);
  46 int stellaris_erase(struct flash_bank_s *bank, int first, int last);
  47 int stellaris_protect(struct flash_bank_s *bank, int set, int first, int last);
  48 int stellaris_write(struct flash_bank_s *bank, u8 *buffer, u32 offset, u32 count);
  49 int stellaris_auto_probe(struct flash_bank_s *bank);
  50 int stellaris_probe(struct flash_bank_s *bank);
  51 int stellaris_erase_check(struct flash_bank_s *bank);
  52 int stellaris_protect_check(struct flash_bank_s *bank);
  53 int stellaris_info(struct flash_bank_s *bank, char *buf, int buf_size);
  54
  55 int stellaris_read_part_info(struct flash_bank_s *bank);
  56 u32 stellaris_get_flash_status(flash_bank_t *bank);
  57 void stellaris_set_flash_mode(flash_bank_t *bank,int mode);
  58 u32 stellaris_wait_status_busy(flash_bank_t *bank, u32 waitbits, int timeout);
  59
  60 int stellaris_read_part_info(struct flash_bank_s *bank);
  61
  62 flash_driver_t stellaris_flash =
  63 {
  64         .name = "stellaris",
  65         .register_commands = stellaris_register_commands,
  66         .flash_bank_command = stellaris_flash_bank_command,
  67         .erase = stellaris_erase,
  68         .protect = stellaris_protect,
  69         .write = stellaris_write,
  70         .probe = stellaris_probe,
  71         .auto_probe = stellaris_auto_probe,
  72         .erase_check = stellaris_erase_check,
  73         .protect_check = stellaris_protect_check,
  74         .info = stellaris_info
  75 };
  76
  77
  78 struct {
  79         u32 partno;
  80         char *partname;
  81 }       StellarisParts[] =
  82 {
  83         {0x01,"LM3S101"},
  84         {0x02,"LM3S102"},
  85         {0x19,"LM3S300"},
  86         {0x11,"LM3S301"},
  87         {0x12,"LM3S310"},
  88         {0x1A,"LM3S308"},
  89         {0x13,"LM3S315"},
  90         {0x14,"LM3S316"},
  91         {0x17,"LM3S317"},
  92         {0x18,"LM3S318"},
  93         {0x15,"LM3S328"},
  94         {0x2A,"LM3S600"},
  95         {0x21,"LM3S601"},
  96         {0x2B,"LM3S608"},
  97         {0x22,"LM3S610"},
  98         {0x23,"LM3S611"},
  99         {0x24,"LM3S612"},
 100         {0x25,"LM3S613"},
 101         {0x26,"LM3S615"},
 102         {0x28,"LM3S617"},
 103         {0x29,"LM3S618"},
 104         {0x27,"LM3S628"},
 105         {0x38,"LM3S800"},
 106         {0x31,"LM3S801"},
 107         {0x39,"LM3S808"},
 108         {0x32,"LM3S811"},
 109         {0x33,"LM3S812"},
 110         {0x34,"LM3S815"},
 111         {0x36,"LM3S817"},
 112         {0x37,"LM3S818"},
 113         {0x35,"LM3S828"},
 114         {0x51,"LM3S2110"},
 115         {0x52,"LM3S2739"},
 116         {0x53,"LM3S2651"},
 117         {0x54,"LM3S2939"},
 118         {0x55,"LM3S2965"},
 119         {0x56,"LM3S2432"},
 120         {0x57,"LM3S2620"},
 121         {0x58,"LM3S2950"},
 122         {0x59,"LM3S2412"},
 123         {0x5A,"LM3S2533"},
 124         {0x61,"LM3S8630"},
 125         {0x62,"LM3S8970"},
 126         {0x63,"LM3S8730"},
 127         {0x64,"LM3S8530"},
 128         {0x65,"LM3S8930"},
 129         {0x71,"LM3S6610"},
 130         {0x72,"LM3S6950"},
 131         {0x73,"LM3S6965"},
 132         {0x74,"LM3S6110"},
 133         {0x75,"LM3S6432"},
 134         {0x76,"LM3S6537"},
 135         {0x77,"LM3S6753"},
 136         {0x78,"LM3S6952"},
 137         {0x82,"LM3S6422"},
 138         {0x83,"LM3S6633"},
 139         {0x84,"LM3S2139"},
 140         {0x85,"LM3S2637"},
 141         {0x86,"LM3S8738"},
 142         {0x88,"LM3S8938"},
 143         {0x89,"LM3S6938"},
 144         {0x8B,"LM3S6637"},
 145         {0x8C,"LM3S8933"},
 146         {0x8D,"LM3S8733"},
 147         {0x8E,"LM3S8538"},
 148         {0x8F,"LM3S2948"},
 149         {0xA1,"LM3S6100"},
 150         {0xA2,"LM3S2410"},
 151         {0xA3,"LM3S6730"},
 152         {0xA4,"LM3S2730"},
 153         {0xA5,"LM3S6420"},
 154         {0xA6,"LM3S8962"},
 155         {0xB3,"LM3S1635"},
 156         {0xB4,"LM3S1850"},
 157         {0xB5,"LM3S1960"},
 158         {0xB7,"LM3S1937"},
 159         {0xB8,"LM3S1968"},
 160         {0xB9,"LM3S1751"},
 161         {0xBA,"LM3S1439"},
 162         {0xBB,"LM3S1512"},
 163         {0xBC,"LM3S1435"},
 164         {0xBD,"LM3S1637"},
 165         {0xBE,"LM3S1958"},
 166         {0xBF,"LM3S1110"},
 167         {0xC0,"LM3S1620"},
 168         {0xC1,"LM3S1150"},
 169         {0xC2,"LM3S1165"},
 170         {0xC3,"LM3S1133"},
 171         {0xC4,"LM3S1162"},
 172         {0xC5,"LM3S1138"},
 173         {0xC6,"LM3S1332"},
 174         {0xC7,"LM3S1538"},
 175         {0xD0,"LM3S6815"},
 176         {0xD1,"LM3S6816"},
 177         {0xD2,"LM3S6915"},
 178         {0xD3,"LM3S6916"},
 179         {0xD4,"LM3S2016"},
 180         {0xD5,"LM3S1615"},
 181         {0xD6,"LM3S1616"},
 182         {0xD7,"LM3S8971"},
 183         {0xD8,"LM3S1108"},
 184         {0xD9,"LM3S1101"},
 185         {0xDA,"LM3S1608"},
 186         {0xDB,"LM3S1601"},
 187         {0xDC,"LM3S1918"},
 188         {0xDD,"LM3S1911"},
 189         {0xDE,"LM3S2108"},
 190         {0xDF,"LM3S2101"},
 191         {0xE0,"LM3S2608"},
 192         {0xE1,"LM3S2601"},
 193         {0xE2,"LM3S2918"},
 194         {0xE3,"LM3S2911"},
 195         {0xE4,"LM3S6118"},
 196         {0xE5,"LM3S6111"},
 197         {0xE6,"LM3S6618"},
 198         {0xE7,"LM3S6611"},
 199         {0xE8,"LM3S6918"},
 200         {0xE9,"LM3S6911"},
 201         {0,"Unknown part"}
 202 };
 203
 204 char * StellarisClassname[2] =
 205 {
 206         "Sandstorm",
 207         "Fury"
 208 };
 209
 210 /***************************************************************************
 211 *       openocd command interface                                              *
 212 ***************************************************************************/
 213
 214 /* flash_bank stellaris <base> <size> 0 0 <target#>
 215  */
 216 int stellaris_flash_bank_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc, struct flash_bank_s *bank)
 217 {
 218         stellaris_flash_bank_t *stellaris_info;
 219
 220         if (argc < 6)
 221         {
 222                 LOG_WARNING("incomplete flash_bank stellaris configuration");
 223                 return ERROR_FLASH_BANK_INVALID;
 224         }
 225
 226         stellaris_info = calloc(sizeof(stellaris_flash_bank_t),1);
 227         bank->base = 0x0;
 228         bank->driver_priv = stellaris_info;
 229
 230         stellaris_info->target_name = "Unknown target";
 231
 232         /* part wasn't probed for info yet */
 233         stellaris_info->did1 = 0;
 234
 235         /* TODO Use an optional main oscillator clock rate in kHz from arg[6] */
 236         return ERROR_OK;
 237 }
 238
 239 int stellaris_register_commands(struct command_context_s *cmd_ctx)
 240 {
 241 /*
 242         command_t *stellaris_cmd = register_command(cmd_ctx, NULL, "stellaris", NULL, COMMAND_ANY, NULL);
 243         register_command(cmd_ctx, stellaris_cmd, "gpnvm", stellaris_handle_gpnvm_command, COMMAND_EXEC,
 244                         "stellaris gpnvm <num> <bit> set|clear, set or clear stellaris gpnvm bit");
 245 */
 246         return ERROR_OK;
 247 }
 248
 249 int stellaris_info(struct flash_bank_s *bank, char *buf, int buf_size)
 250 {
 251         int printed, device_class;
 252         stellaris_flash_bank_t *stellaris_info = bank->driver_priv;
 253
 254         stellaris_read_part_info(bank);
 255
 256         if (stellaris_info->did1 == 0)
 257         {
 258                 printed = snprintf(buf, buf_size, "Cannot identify target as a Stellaris\n");
 259                 buf += printed;
 260                 buf_size -= printed;
 261                 return ERROR_FLASH_OPERATION_FAILED;
 262         }
 263
 264         if (DID0_VER(stellaris_info->did0)>0)
 265         {
 266                 device_class = (stellaris_info->did0>>16)&0xFF;
 267         }
 268         else
 269         {
 270                 device_class = 0;
 271         }
 272         printed = snprintf(buf, buf_size, "\nLMI Stellaris information: Chip is class %i(%s) %s v%c.%i\n",
 273           device_class, StellarisClassname[device_class], stellaris_info->target_name,
 274           'A' + ((stellaris_info->did0>>8)&0xFF), (stellaris_info->did0)&0xFF);
 275         buf += printed;
 276         buf_size -= printed;
 277
 278         printed = snprintf(buf, buf_size, "did1: 0x%8.8x, arch: 0x%4.4x, eproc: %s, ramsize:%ik,  flashsize: %ik\n",
 279          stellaris_info->did1, stellaris_info->did1, "ARMV7M", (1+((stellaris_info->dc0>>16)&0xFFFF))/4, (1+(stellaris_info->dc0&0xFFFF))*2);
 280         buf += printed;
 281         buf_size -= printed;
 282
 283         printed = snprintf(buf, buf_size, "master clock(estimated): %ikHz,  rcc is 0x%x \n", stellaris_info->mck_freq / 1000, stellaris_info->rcc);
 284         buf += printed;
 285         buf_size -= printed;
 286
 287         if (stellaris_info->num_lockbits>0) {
 288                 printed = snprintf(buf, buf_size, "pagesize: %i, lockbits: %i 0x%4.4x, pages in lock region: %i \n", stellaris_info->pagesize, stellaris_info->num_lockbits, stellaris_info->lockbits,stellaris_info->num_pages/stellaris_info->num_lockbits);
 289                 buf += printed;
 290                 buf_size -= printed;
 291         }
 292         return ERROR_OK;
 293 }
 294
 295 /***************************************************************************
 296 *       chip identification and status                                         *
 297 ***************************************************************************/
 298
 299 u32 stellaris_get_flash_status(flash_bank_t *bank)
 300 {
 301         target_t *target = bank->target;
 302         u32 fmc;
 303
 304         target_read_u32(target, FLASH_CONTROL_BASE|FLASH_FMC, &fmc);
 305
 306         return fmc;
 307 }
 308
 309 /** Read clock configuration and set stellaris_info->usec_clocks*/
 310
 311 void stellaris_read_clock_info(flash_bank_t *bank)
 312 {
 313         stellaris_flash_bank_t *stellaris_info = bank->driver_priv;
 314         target_t *target = bank->target;
 315         u32 rcc, pllcfg, sysdiv, usesysdiv, bypass, oscsrc;
 316         unsigned long mainfreq;
 317
 318         target_read_u32(target, SCB_BASE|RCC, &rcc);
 319         LOG_DEBUG("Stellaris RCC %x",rcc);
 320         target_read_u32(target, SCB_BASE|PLLCFG, &pllcfg);
 321         LOG_DEBUG("Stellaris PLLCFG %x",pllcfg);
 322         stellaris_info->rcc = rcc;
 323
 324         sysdiv = (rcc>>23)&0xF;
 325         usesysdiv = (rcc>>22)&0x1;
 326         bypass = (rcc>>11)&0x1;
 327         oscsrc = (rcc>>4)&0x3;
 328         /* xtal = (rcc>>6)&0xF; */
 329         switch (oscsrc)
 330         {
 331                 case 0:
 332                         mainfreq = 6000000;  /* Default xtal */
 333                         break;
 334                 case 1:
 335                         mainfreq = 22500000; /* Internal osc. 15 MHz +- 50% */
 336                         break;
 337                 case 2:
 338                         mainfreq = 5625000;  /* Internal osc. / 4 */
 339                         break;
 340                 case 3:
 341                         LOG_WARNING("Invalid oscsrc (3) in rcc register");
 342                         mainfreq = 6000000;
 343                         break;
 344
 345                 default: /* NOTREACHED */
 346                         mainfreq = 0;
 347                         break;
 348         }
 349
 350         if (!bypass)
 351                 mainfreq = 200000000; /* PLL out frec */
 352
 353         if (usesysdiv)
 354                 stellaris_info->mck_freq = mainfreq/(1+sysdiv);
 355         else
 356                 stellaris_info->mck_freq = mainfreq;
 357
 358         /* Forget old flash timing */
 359         stellaris_set_flash_mode(bank,0);
 360 }
 361
 362 /* Setup the timimg registers */
 363 void stellaris_set_flash_mode(flash_bank_t *bank,int mode)
 364 {
 365         stellaris_flash_bank_t *stellaris_info = bank->driver_priv;
 366         target_t *target = bank->target;
 367
 368         u32 usecrl = (stellaris_info->mck_freq/1000000ul-1);
 369         LOG_DEBUG("usecrl = %i",usecrl);
 370         target_write_u32(target, SCB_BASE|USECRL , usecrl);
 371
 372 }
 373
 374 u32 stellaris_wait_status_busy(flash_bank_t *bank, u32 waitbits, int timeout)
 375 {
 376         u32 status;
 377
 378         /* Stellaris waits for cmdbit to clear */
 379         while (((status = stellaris_get_flash_status(bank)) & waitbits) && (timeout-- > 0))
 380         {
 381                 LOG_DEBUG("status: 0x%x", status);
 382                 usleep(1000);
 383         }
 384
 385         /* Flash errors are reflected in the FLASH_CRIS register */
 386
 387         return status;
 388 }
 389
 390
 391 /* Send one command to the flash controller */
 392 int stellaris_flash_command(struct flash_bank_s *bank,u8 cmd,u16 pagen)
 393 {
 394         u32 fmc;
 395         target_t *target = bank->target;
 396
 397         fmc = FMC_WRKEY | cmd;
 398         target_write_u32(target, FLASH_CONTROL_BASE|FLASH_FMC, fmc);
 399         LOG_DEBUG("Flash command: 0x%x", fmc);
 400
 401         if (stellaris_wait_status_busy(bank, cmd, 100))
 402         {
 403                 return ERROR_FLASH_OPERATION_FAILED;
 404         }
 405
 406         return ERROR_OK;
 407 }
 408
 409 /* Read device id register, main clock frequency register and fill in driver info structure */
 410 int stellaris_read_part_info(struct flash_bank_s *bank)
 411 {
 412         stellaris_flash_bank_t *stellaris_info = bank->driver_priv;
 413         target_t *target = bank->target;
 414         u32 did0,did1, ver, fam, status;
 415         int i;
 416
 417         /* Read and parse chip identification register */
 418         target_read_u32(target, SCB_BASE|DID0, &did0);
 419         target_read_u32(target, SCB_BASE|DID1, &did1);
 420         target_read_u32(target, SCB_BASE|DC0, &stellaris_info->dc0);
 421         target_read_u32(target, SCB_BASE|DC1, &stellaris_info->dc1);
 422         LOG_DEBUG("did0 0x%x, did1 0x%x, dc0 0x%x, dc1 0x%x",did0, did1, stellaris_info->dc0,stellaris_info->dc1);
 423
 424         ver = did0 >> 28;
 425         if((ver != 0) && (ver != 1))
 426         {
 427                 LOG_WARNING("Unknown did0 version, cannot identify target");
 428                 return ERROR_FLASH_OPERATION_FAILED;
 429         }
 430
 431         if (did1 == 0)
 432         {
 433                 LOG_WARNING("Cannot identify target as a Stellaris");
 434                 return ERROR_FLASH_OPERATION_FAILED;
 435         }
 436
 437         ver = did1 >> 28;
 438         fam = (did1 >> 24) & 0xF;
 439         if(((ver != 0) && (ver != 1)) || (fam != 0))
 440         {
 441                 LOG_WARNING("Unknown did1 version/family, cannot positively identify target as a Stellaris");
 442         }
 443
 444         for (i=0;StellarisParts[i].partno;i++)
 445         {
 446                 if (StellarisParts[i].partno==((did1>>16)&0xFF))
 447                         break;
 448         }
 449
 450         stellaris_info->target_name = StellarisParts[i].partname;
 451
 452         stellaris_info->did0 = did0;
 453         stellaris_info->did1 = did1;
 454
 455         stellaris_info->num_lockbits = 1+(stellaris_info->dc0&0xFFFF);
 456         stellaris_info->num_pages = 2*(1+(stellaris_info->dc0&0xFFFF));
 457         stellaris_info->pagesize = 1024;
 458         bank->size = 1024*stellaris_info->num_pages;
 459         stellaris_info->pages_in_lockregion = 2;
 460         target_read_u32(target, SCB_BASE|FMPPE, &stellaris_info->lockbits);
 461
 462         /* provide this for the benefit of the higher flash driver layers */
 463         bank->num_sectors = stellaris_info->num_pages;
 464         bank->sectors = malloc(sizeof(flash_sector_t) * bank->num_sectors);
 465         for (i = 0; i < bank->num_sectors; i++)
 466         {
 467                 bank->sectors[i].offset = i*stellaris_info->pagesize;
 468                 bank->sectors[i].size = stellaris_info->pagesize;
 469                 bank->sectors[i].is_erased = -1;
 470                 bank->sectors[i].is_protected = -1;
 471         }
 472
 473         /* Read main and master clock freqency register */
 474         stellaris_read_clock_info(bank);
 475
 476         status = stellaris_get_flash_status(bank);
 477
 478         return ERROR_OK;
 479 }
 480
 481 /***************************************************************************
 482 *       flash operations                                                       *
 483 ***************************************************************************/
 484
 485 int stellaris_erase_check(struct flash_bank_s *bank)
 486 {
 487         /*
 488
 489         stellaris_flash_bank_t *stellaris_info = bank->driver_priv;
 490         target_t *target = bank->target;
 491         int i;
 492
 493         */
 494
 495         return ERROR_OK;
 496 }
 497
 498 int stellaris_protect_check(struct flash_bank_s *bank)
 499 {
 500         u32 status;
 501
 502         stellaris_flash_bank_t *stellaris_info = bank->driver_priv;
 503
 504         if (bank->target->state != TARGET_HALTED)
 505         {
 506                 return ERROR_TARGET_NOT_HALTED;
 507         }
 508
 509         if (stellaris_info->did1 == 0)
 510         {
 511                 stellaris_read_part_info(bank);
 512         }
 513
 514         if (stellaris_info->did1 == 0)
 515         {
 516                 LOG_WARNING("Cannot identify target as an AT91SAM");
 517                 return ERROR_FLASH_OPERATION_FAILED;
 518         }
 519
 520         status = stellaris_get_flash_status(bank);
 521         stellaris_info->lockbits = status >> 16;
 522
 523         return ERROR_OK;
 524 }
 525
 526 int stellaris_erase(struct flash_bank_s *bank, int first, int last)
 527 {
 528         int banknr;
 529         u32 flash_fmc, flash_cris;
 530         stellaris_flash_bank_t *stellaris_info = bank->driver_priv;
 531         target_t *target = bank->target;
 532
 533         if (bank->target->state != TARGET_HALTED)
 534         {
 535                 return ERROR_TARGET_NOT_HALTED;
 536         }
 537
 538         if (stellaris_info->did1 == 0)
 539         {
 540                 stellaris_read_part_info(bank);
 541         }
 542
 543         if (stellaris_info->did1 == 0)
 544         {
 545                 LOG_WARNING("Cannot identify target as Stellaris");
 546                 return ERROR_FLASH_OPERATION_FAILED;
 547         }
 548
 549         if ((first < 0) || (last < first) || (last >= stellaris_info->num_pages))
 550         {
 551                 return ERROR_FLASH_SECTOR_INVALID;
 552         }
 553
 554         /* Configure the flash controller timing */
 555         stellaris_read_clock_info(bank);
 556         stellaris_set_flash_mode(bank,0);
 557
 558         /* Clear and disable flash programming interrupts */
 559         target_write_u32(target, FLASH_CIM, 0);
 560         target_write_u32(target, FLASH_MISC, PMISC|AMISC);
 561
 562         if ((first == 0) && (last == (stellaris_info->num_pages-1)))
 563         {
 564                 target_write_u32(target, FLASH_FMA, 0);
 565                 target_write_u32(target, FLASH_FMC, FMC_WRKEY | FMC_MERASE);
 566                 /* Wait until erase complete */
 567                 do
 568                 {
 569                         target_read_u32(target, FLASH_FMC, &flash_fmc);
 570                 }
 571                 while(flash_fmc & FMC_MERASE);
 572
 573                 /* if device has > 128k, then second erase cycle is needed */
 574                 if(stellaris_info->num_pages * stellaris_info->pagesize > 0x20000)
 575                 {
 576                         target_write_u32(target, FLASH_FMA, 0x20000);
 577                         target_write_u32(target, FLASH_FMC, FMC_WRKEY | FMC_MERASE);
 578                         /* Wait until erase complete */
 579                         do
 580                         {
 581                                 target_read_u32(target, FLASH_FMC, &flash_fmc);
 582                         }
 583                         while(flash_fmc & FMC_MERASE);
 584                 }
 585
 586                 return ERROR_OK;
 587         }
 588
 589         for (banknr=first;banknr<=last;banknr++)
 590         {
 591                 /* Address is first word in page */
 592                 target_write_u32(target, FLASH_FMA, banknr*stellaris_info->pagesize);
 593                 /* Write erase command */
 594                 target_write_u32(target, FLASH_FMC, FMC_WRKEY | FMC_ERASE);
 595                 /* Wait until erase complete */
 596                 do
 597                 {
 598                         target_read_u32(target, FLASH_FMC, &flash_fmc);
 599                 }
 600                 while(flash_fmc & FMC_ERASE);
 601
 602                 /* Check acess violations */
 603                 target_read_u32(target, FLASH_CRIS, &flash_cris);
 604                 if(flash_cris & (AMASK))
 605                 {
 606                         LOG_WARNING("Error erasing flash page %i,  flash_cris 0x%x", banknr, flash_cris);
 607                         target_write_u32(target, FLASH_CRIS, 0);
 608                         return ERROR_FLASH_OPERATION_FAILED;
 609                 }
 610
 611                 bank->sectors[banknr].is_erased = 1;
 612         }
 613
 614         return ERROR_OK;
 615 }
 616
 617 int stellaris_protect(struct flash_bank_s *bank, int set, int first, int last)
 618 {
 619         u32 fmppe, flash_fmc, flash_cris;
 620         int lockregion;
 621
 622         stellaris_flash_bank_t *stellaris_info = bank->driver_priv;
 623         target_t *target = bank->target;
 624
 625         if (bank->target->state != TARGET_HALTED)
 626         {
 627                 return ERROR_TARGET_NOT_HALTED;
 628         }
 629
 630         if ((first < 0) || (last < first) || (last >= stellaris_info->num_lockbits))
 631         {
 632                 return ERROR_FLASH_SECTOR_INVALID;
 633         }
 634
 635         if (stellaris_info->did1 == 0)
 636         {
 637                 stellaris_read_part_info(bank);
 638         }
 639
 640         if (stellaris_info->did1 == 0)
 641         {
 642                 LOG_WARNING("Cannot identify target as an Stellaris MCU");
 643                 return ERROR_FLASH_OPERATION_FAILED;
 644         }
 645
 646         /* Configure the flash controller timing */
 647         stellaris_read_clock_info(bank);
 648         stellaris_set_flash_mode(bank,0);
 649
 650         fmppe = stellaris_info->lockbits;
 651         for (lockregion=first;lockregion<=last;lockregion++)
 652         {
 653                 if (set)
 654                          fmppe &= ~(1<<lockregion);
 655                 else
 656                          fmppe |= (1<<lockregion);
 657         }
 658
 659         /* Clear and disable flash programming interrupts */
 660         target_write_u32(target, FLASH_CIM, 0);
 661         target_write_u32(target, FLASH_MISC, PMISC|AMISC);
 662
 663         LOG_DEBUG("fmppe 0x%x",fmppe);
 664         target_write_u32(target, SCB_BASE|FMPPE, fmppe);
 665         /* Commit FMPPE */
 666         target_write_u32(target, FLASH_FMA, 1);
 667         /* Write commit command */
 668         /* TODO safety check, sice this cannot be undone */
 669         LOG_WARNING("Flash protection cannot be removed once commited, commit is NOT executed !");
 670         /* target_write_u32(target, FLASH_FMC, FMC_WRKEY | FMC_COMT); */
 671         /* Wait until erase complete */
 672         do
 673         {
 674                 target_read_u32(target, FLASH_FMC, &flash_fmc);
 675         }
 676         while(flash_fmc & FMC_COMT);
 677
 678         /* Check acess violations */
 679         target_read_u32(target, FLASH_CRIS, &flash_cris);
 680         if(flash_cris & (AMASK))
 681         {
 682                 LOG_WARNING("Error setting flash page protection,  flash_cris 0x%x", flash_cris);
 683                 target_write_u32(target, FLASH_CRIS, 0);
 684                 return ERROR_FLASH_OPERATION_FAILED;
 685         }
 686
 687         target_read_u32(target, SCB_BASE|FMPPE, &stellaris_info->lockbits);
 688
 689         return ERROR_OK;
 690 }
 691
 692 u8 stellaris_write_code[] =
 693 {
 694 /*
 695         Call with :
 696         r0 = buffer address
 697         r1 = destination address
 698         r2 = bytecount (in) - endaddr (work)
 699
 700         Used registers:
 701         r3 = pFLASH_CTRL_BASE
 702         r4 = FLASHWRITECMD
 703         r5 = #1
 704         r6 = bytes written
 705         r7 = temp reg
 706 */
 707         0x07,0x4B,                      /* ldr r3,pFLASH_CTRL_BASE */
 708         0x08,0x4C,                      /* ldr r4,FLASHWRITECMD */
 709         0x01,0x25,                      /* movs r5, 1 */
 710         0x00,0x26,                      /* movs r6, #0 */
 711 /* mainloop: */
 712         0x19,0x60,                      /* str  r1, [r3, #0] */
 713         0x87,0x59,                      /* ldr  r7, [r0, r6] */
 714         0x5F,0x60,                      /* str  r7, [r3, #4] */
 715         0x9C,0x60,                      /* str  r4, [r3, #8] */
 716 /* waitloop: */
 717         0x9F,0x68,                      /* ldr  r7, [r3, #8] */
 718         0x2F,0x42,                      /* tst  r7, r5 */
 719         0xFC,0xD1,                      /* bne  waitloop */
 720         0x04,0x31,                      /* adds r1, r1, #4 */
 721         0x04,0x36,                      /* adds r6, r6, #4 */
 722         0x96,0x42,                      /* cmp  r6, r2 */
 723         0xF4,0xD1,                      /* bne  mainloop */
 724         0x00,0xBE,                      /* bkpt #0 */
 725 /* pFLASH_CTRL_BASE: */
 726         0x00,0xD0,0x0F,0x40,    /* .word        0x400FD000 */
 727 /* FLASHWRITECMD: */
 728         0x01,0x00,0x42,0xA4     /* .word        0xA4420001 */
 729 };
 730
 731 int stellaris_write_block(struct flash_bank_s *bank, u8 *buffer, u32 offset, u32 wcount)
 732 {
 733         target_t *target = bank->target;
 734         u32 buffer_size = 8192;
 735         working_area_t *source;
 736         working_area_t *write_algorithm;
 737         u32 address = bank->base + offset;
 738         reg_param_t reg_params[8];
 739         armv7m_algorithm_t armv7m_info;
 740         int retval;
 741
 742         LOG_DEBUG("(bank=%p buffer=%p offset=%08X wcount=%08X)",
 743                         bank, buffer, offset, wcount);
 744
 745         /* flash write code */
 746         if (target_alloc_working_area(target, sizeof(stellaris_write_code), &write_algorithm) != ERROR_OK)
 747                 {
 748                         LOG_WARNING("no working area available, can't do block memory writes");
 749                         return ERROR_TARGET_RESOURCE_NOT_AVAILABLE;
 750                 };
 751
 752         target_write_buffer(target, write_algorithm->address, sizeof(stellaris_write_code), stellaris_write_code);
 753
 754         /* memory buffer */
 755         while (target_alloc_working_area(target, buffer_size, &source) != ERROR_OK)
 756         {
 757                 LOG_DEBUG("called target_alloc_working_area(target=%p buffer_size=%08X source=%p)",
 758                                 target, buffer_size, source);
 759                 buffer_size /= 2;
 760                 if (buffer_size <= 256)
 761                 {
 762                         /* if we already allocated the writing code, but failed to get a buffer, free the algorithm */
 763                         if (write_algorithm)
 764                                 target_free_working_area(target, write_algorithm);
 765
 766                         LOG_WARNING("no large enough working area available, can't do block memory writes");
 767                         return ERROR_TARGET_RESOURCE_NOT_AVAILABLE;
 768                 }
 769         };
 770
 771         armv7m_info.common_magic = ARMV7M_COMMON_MAGIC;
 772         armv7m_info.core_mode = ARMV7M_MODE_ANY;
 773
 774         init_reg_param(&reg_params[0], "r0", 32, PARAM_OUT);
 775         init_reg_param(&reg_params[1], "r1", 32, PARAM_OUT);
 776         init_reg_param(&reg_params[2], "r2", 32, PARAM_OUT);
 777         init_reg_param(&reg_params[3], "r3", 32, PARAM_OUT);
 778         init_reg_param(&reg_params[4], "r4", 32, PARAM_OUT);
 779         init_reg_param(&reg_params[5], "r5", 32, PARAM_OUT);
 780         init_reg_param(&reg_params[6], "r6", 32, PARAM_OUT);
 781         init_reg_param(&reg_params[7], "r7", 32, PARAM_OUT);
 782
 783         while (wcount > 0)
 784         {
 785                 u32 thisrun_count = (wcount > (buffer_size / 4)) ? (buffer_size / 4) : wcount;
 786
 787                 target_write_buffer(target, source->address, thisrun_count * 4, buffer);
 788
 789                 buf_set_u32(reg_params[0].value, 0, 32, source->address);
 790                 buf_set_u32(reg_params[1].value, 0, 32, address);
 791                 buf_set_u32(reg_params[2].value, 0, 32, 4*thisrun_count);
 792                 LOG_WARNING("Algorithm flash write  %i words to 0x%x, %i remaining",thisrun_count,address, wcount);
 793                 LOG_DEBUG("Algorithm flash write  %i words to 0x%x, %i remaining",thisrun_count,address, wcount);
 794                 if ((retval = target->type->run_algorithm(target, 0, NULL, 3, reg_params, write_algorithm->address, write_algorithm->address + sizeof(stellaris_write_code)-10, 10000, &armv7m_info)) != ERROR_OK)
 795                 {
 796                         LOG_ERROR("error executing stellaris flash write algorithm");
 797                         target_free_working_area(target, source);
 798                         destroy_reg_param(&reg_params[0]);
 799                         destroy_reg_param(&reg_params[1]);
 800                         destroy_reg_param(&reg_params[2]);
 801                         return ERROR_FLASH_OPERATION_FAILED;
 802                 }
 803
 804                 buffer += thisrun_count * 4;
 805                 address += thisrun_count * 4;
 806                 wcount -= thisrun_count;
 807         }
 808
 809
 810         target_free_working_area(target, write_algorithm);
 811         target_free_working_area(target, source);
 812
 813         destroy_reg_param(&reg_params[0]);
 814         destroy_reg_param(&reg_params[1]);
 815         destroy_reg_param(&reg_params[2]);
 816         destroy_reg_param(&reg_params[3]);
 817         destroy_reg_param(&reg_params[4]);
 818         destroy_reg_param(&reg_params[5]);
 819         destroy_reg_param(&reg_params[6]);
 820         destroy_reg_param(&reg_params[7]);
 821
 822         return ERROR_OK;
 823 }
 824
 825 int stellaris_write(struct flash_bank_s *bank, u8 *buffer, u32 offset, u32 count)
 826 {
 827         stellaris_flash_bank_t *stellaris_info = bank->driver_priv;
 828         target_t *target = bank->target;
 829         u32 address = offset;
 830         u32 flash_cris,flash_fmc;
 831         u32 retval;
 832
 833         if (bank->target->state != TARGET_HALTED)
 834         {
 835                 return ERROR_TARGET_NOT_HALTED;
 836         }
 837
 838         LOG_DEBUG("(bank=%p buffer=%p offset=%08X count=%08X)",
 839                         bank, buffer, offset, count);
 840
 841         if (stellaris_info->did1 == 0)
 842         {
 843                 stellaris_read_part_info(bank);
 844         }
 845
 846         if (stellaris_info->did1 == 0)
 847         {
 848                 LOG_WARNING("Cannot identify target as a Stellaris processor");
 849                 return ERROR_FLASH_OPERATION_FAILED;
 850         }
 851
 852         if((offset & 3) || (count & 3))
 853         {
 854                 LOG_WARNING("offset size must be word aligned");
 855                 return ERROR_FLASH_DST_BREAKS_ALIGNMENT;
 856         }
 857
 858         if (offset + count > bank->size)
 859                 return ERROR_FLASH_DST_OUT_OF_BANK;
 860
 861         /* Configure the flash controller timing */
 862         stellaris_read_clock_info(bank);
 863         stellaris_set_flash_mode(bank,0);
 864
 865
 866         /* Clear and disable flash programming interrupts */
 867         target_write_u32(target, FLASH_CIM, 0);
 868         target_write_u32(target, FLASH_MISC, PMISC|AMISC);
 869
 870         /* multiple words to be programmed? */
 871         if (count > 0)
 872         {
 873                 /* try using a block write */
 874                 if ((retval = stellaris_write_block(bank, buffer, offset, count/4)) != ERROR_OK)
 875                 {
 876                         if (retval == ERROR_TARGET_RESOURCE_NOT_AVAILABLE)
 877                         {
 878                                 /* if block write failed (no sufficient working area),
 879                                  * we use normal (slow) single dword accesses */
 880                                 LOG_WARNING("couldn't use block writes, falling back to single memory accesses");
 881                         }
 882                         else if (retval == ERROR_FLASH_OPERATION_FAILED)
 883                         {
 884                                 /* if an error occured, we examine the reason, and quit */
 885                                 target_read_u32(target, FLASH_CRIS, &flash_cris);
 886
 887                                 LOG_ERROR("flash writing failed with CRIS: 0x%x", flash_cris);
 888                                 return ERROR_FLASH_OPERATION_FAILED;
 889                         }
 890                 }
 891                 else
 892                 {
 893                         buffer += count * 4;
 894                         address += count * 4;
 895                         count = 0;
 896                 }
 897         }
 898
 899
 900
 901         while(count>0)
 902         {
 903                 if (!(address&0xff)) LOG_DEBUG("0x%x",address);
 904                 /* Program one word */
 905                 target_write_u32(target, FLASH_FMA, address);
 906                 target_write_buffer(target, FLASH_FMD, 4, buffer);
 907                 target_write_u32(target, FLASH_FMC, FMC_WRKEY | FMC_WRITE);
 908                 /* LOG_DEBUG("0x%x 0x%x 0x%x",address,buf_get_u32(buffer, 0, 32),FMC_WRKEY | FMC_WRITE); */
 909                 /* Wait until write complete */
 910                 do
 911                 {
 912                         target_read_u32(target, FLASH_FMC, &flash_fmc);
 913                 }
 914                 while(flash_fmc & FMC_WRITE);
 915                 buffer += 4;
 916                 address += 4;
 917                 count -= 4;
 918         }
 919         /* Check acess violations */
 920         target_read_u32(target, FLASH_CRIS, &flash_cris);
 921         if(flash_cris & (AMASK))
 922         {
 923                 LOG_DEBUG("flash_cris 0x%x", flash_cris);
 924                 return ERROR_FLASH_OPERATION_FAILED;
 925         }
 926         return ERROR_OK;
 927 }
 928
 929
 930 int stellaris_probe(struct flash_bank_s *bank)
 931 {
 932         /* we can't probe on an stellaris
 933          * if this is an stellaris, it has the configured flash
 934          */
 935
 936         if (bank->target->state != TARGET_HALTED)
 937         {
 938                 return ERROR_TARGET_NOT_HALTED;
 939         }
 940
 941         /* stellaris_read_part_info() already takes care about error checking and reporting */
 942         return stellaris_read_part_info(bank);
 943 }
 944
 945 int stellaris_auto_probe(struct flash_bank_s *bank)
 946 {
 947         stellaris_flash_bank_t *stellaris_info = bank->driver_priv;
 948         if (stellaris_info->did1)
 949                 return ERROR_OK;
 950         return stellaris_probe(bank);
 951 }