git.gag.com Git - fw/openocd/blob - src/flash/nor/stellaris.c

   1 /***************************************************************************
   2  *   Copyright (C) 2006 by Magnus Lundin                                   *
   3  *   lundin@mlu.mine.nu                                                    *
   4  *                                                                         *
   5  *   Copyright (C) 2008 by Spencer Oliver                                  *
   6  *   spen@spen-soft.co.uk                                                  *
   7  *                                                                         *
   8  *   This program is free software; you can redistribute it and/or modify  *
   9  *   it under the terms of the GNU General Public License as published by  *
  10  *   the Free Software Foundation; either version 2 of the License, or     *
  11  *   (at your option) any later version.                                   *
  12  *                                                                         *
  13  *   This program is distributed in the hope that it will be useful,       *
  14  *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
  15  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
  16  *   GNU General Public License for more details.                          *
  17  *                                                                         *
  18  *   You should have received a copy of the GNU General Public License     *
  19  *   along with this program; if not, write to the                         *
  20  *   Free Software Foundation, Inc.,                                       *
  21  *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             *
  22  ***************************************************************************/
  23
  24 /***************************************************************************
  25 * STELLARIS flash is tested on LM3S811, LM3S6965, LM3s3748, more.
  26 ***************************************************************************/
  27 #ifdef HAVE_CONFIG_H
  28 #include "config.h"
  29 #endif
  30
  31 #include "imp.h"
  32 #include <target/algorithm.h>
  33 #include <target/armv7m.h>
  34
  35
  36 #define DID0_VER(did0) ((did0 >> 28)&0x07)
  37
  38 /* STELLARIS control registers */
  39 #define SCB_BASE        0x400FE000
  40 #define DID0            0x000
  41 #define DID1            0x004
  42 #define DC0                     0x008
  43 #define DC1                     0x010
  44 #define DC2                     0x014
  45 #define DC3                     0x018
  46 #define DC4                     0x01C
  47
  48 #define RIS                     0x050
  49 #define RCC                     0x060
  50 #define PLLCFG          0x064
  51 #define RCC2            0x070
  52 #define NVMSTAT         0x1a0
  53
  54 /* "legacy" flash memory protection registers (64KB max) */
  55 #define FMPRE           0x130
  56 #define FMPPE           0x134
  57
  58 /* new flash memory protection registers (for more than 64KB) */
  59 #define FMPRE0          0x200           /* PRE1 = PRE0 + 4, etc */
  60 #define FMPPE0          0x400           /* PPE1 = PPE0 + 4, etc */
  61
  62 #define USECRL          0x140
  63
  64 #define FLASH_CONTROL_BASE      0x400FD000
  65 #define FLASH_FMA       (FLASH_CONTROL_BASE | 0x000)
  66 #define FLASH_FMD       (FLASH_CONTROL_BASE | 0x004)
  67 #define FLASH_FMC       (FLASH_CONTROL_BASE | 0x008)
  68 #define FLASH_CRIS      (FLASH_CONTROL_BASE | 0x00C)
  69 #define FLASH_CIM       (FLASH_CONTROL_BASE | 0x010)
  70 #define FLASH_MISC      (FLASH_CONTROL_BASE | 0x014)
  71
  72 #define AMISC   1
  73 #define PMISC   2
  74
  75 #define AMASK   1
  76 #define PMASK   2
  77
  78 /* Flash Controller Command bits */
  79 #define FMC_WRKEY       (0xA442 << 16)
  80 #define FMC_COMT        (1 << 3)
  81 #define FMC_MERASE      (1 << 2)
  82 #define FMC_ERASE       (1 << 1)
  83 #define FMC_WRITE       (1 << 0)
  84
  85 /* STELLARIS constants */
  86
  87 /* values to write in FMA to commit write-"once" values */
  88 #define FLASH_FMA_PRE(x)        (2 * (x))       /* for FMPPREx */
  89 #define FLASH_FMA_PPE(x)        (2 * (x) + 1)   /* for FMPPPEx */
  90
  91
  92 static void stellaris_read_clock_info(struct flash_bank *bank);
  93 static int stellaris_mass_erase(struct flash_bank *bank);
  94
  95 struct stellaris_flash_bank
  96 {
  97         /* chip id register */
  98         uint32_t did0;
  99         uint32_t did1;
 100         uint32_t dc0;
 101         uint32_t dc1;
 102
 103         const char * target_name;
 104
 105         uint32_t sramsiz;
 106         uint32_t flshsz;
 107         /* flash geometry */
 108         uint32_t num_pages;
 109         uint32_t pagesize;
 110         uint32_t pages_in_lockregion;
 111
 112         /* nv memory bits */
 113         uint16_t num_lockbits;
 114
 115         /* main clock status */
 116         uint32_t rcc;
 117         uint32_t rcc2;
 118         uint8_t  mck_valid;
 119         uint8_t  xtal_mask;
 120         uint32_t iosc_freq;
 121         uint32_t mck_freq;
 122         const char *iosc_desc;
 123         const char *mck_desc;
 124 };
 125
 126 // Autogenerated by contrib/gen-stellaris-part-header.pl
 127 // From Stellaris Firmware Development Package revision 8049
 128 static struct {
 129         uint32_t partno;
 130         const char *partname;
 131 }       StellarisParts[] =
 132 {
 133         {0x0001,"LM3S101"},
 134         {0x0002,"LM3S102"},
 135         {0x0019,"LM3S300"},
 136         {0x0011,"LM3S301"},
 137         {0x001A,"LM3S308"},
 138         {0x0012,"LM3S310"},
 139         {0x0013,"LM3S315"},
 140         {0x0014,"LM3S316"},
 141         {0x0017,"LM3S317"},
 142         {0x0015,"LM3S328"},
 143         {0x002A,"LM3S600"},
 144         {0x0021,"LM3S601"},
 145         {0x002B,"LM3S608"},
 146         {0x0022,"LM3S610"},
 147         {0x0023,"LM3S611"},
 148         {0x0024,"LM3S612"},
 149         {0x0025,"LM3S613"},
 150         {0x0026,"LM3S615"},
 151         {0x0028,"LM3S617"},
 152         {0x0029,"LM3S618"},
 153         {0x0027,"LM3S628"},
 154         {0x0038,"LM3S800"},
 155         {0x0031,"LM3S801"},
 156         {0x0039,"LM3S808"},
 157         {0x0032,"LM3S811"},
 158         {0x0033,"LM3S812"},
 159         {0x0034,"LM3S815"},
 160         {0x0036,"LM3S817"},
 161         {0x0037,"LM3S818"},
 162         {0x0035,"LM3S828"},
 163         {0x10BF,"LM3S1110"},
 164         {0x10C3,"LM3S1133"},
 165         {0x10C5,"LM3S1138"},
 166         {0x10C1,"LM3S1150"},
 167         {0x10C4,"LM3S1162"},
 168         {0x10C2,"LM3S1165"},
 169         {0x10EC,"LM3S1166"},
 170         {0x10C6,"LM3S1332"},
 171         {0x10BC,"LM3S1435"},
 172         {0x10BA,"LM3S1439"},
 173         {0x10BB,"LM3S1512"},
 174         {0x10C7,"LM3S1538"},
 175         {0x10DB,"LM3S1601"},
 176         {0x1006,"LM3S1607"},
 177         {0x10DA,"LM3S1608"},
 178         {0x10C0,"LM3S1620"},
 179         {0x10CD,"LM3S1621"},
 180         {0x1003,"LM3S1625"},
 181         {0x1004,"LM3S1626"},
 182         {0x1005,"LM3S1627"},
 183         {0x10B3,"LM3S1635"},
 184         {0x10EB,"LM3S1636"},
 185         {0x10BD,"LM3S1637"},
 186         {0x10B1,"LM3S1651"},
 187         {0x10B9,"LM3S1751"},
 188         {0x1010,"LM3S1776"},
 189         {0x1016,"LM3S1811"},
 190         {0x103D,"LM3S1816"},
 191         {0x10B4,"LM3S1850"},
 192         {0x10DD,"LM3S1911"},
 193         {0x10DC,"LM3S1918"},
 194         {0x10B7,"LM3S1937"},
 195         {0x10BE,"LM3S1958"},
 196         {0x10B5,"LM3S1960"},
 197         {0x10B8,"LM3S1968"},
 198         {0x10EA,"LM3S1969"},
 199         {0x10CE,"LM3S1B21"},
 200         {0x10CA,"LM3S1C21"},
 201         {0x10CB,"LM3S1C26"},
 202         {0x1098,"LM3S1C58"},
 203         {0x10B0,"LM3S1D21"},
 204         {0x10CC,"LM3S1D26"},
 205         {0x101D,"LM3S1F11"},
 206         {0x101B,"LM3S1F16"},
 207         {0x10AF,"LM3S1G21"},
 208         {0x1095,"LM3S1G58"},
 209         {0x101E,"LM3S1H11"},
 210         {0x101C,"LM3S1H16"},
 211         {0x100F,"LM3S1J11"},
 212         {0x103C,"LM3S1J16"},
 213         {0x100E,"LM3S1N11"},
 214         {0x103B,"LM3S1N16"},
 215         {0x10B2,"LM3S1P51"},
 216         {0x109E,"LM3S1R21"},
 217         {0x10C9,"LM3S1R26"},
 218         {0x1030,"LM3S1W16"},
 219         {0x102F,"LM3S1Z16"},
 220         {0x10D4,"LM3S2016"},
 221         {0x1051,"LM3S2110"},
 222         {0x1084,"LM3S2139"},
 223         {0x1039,"LM3S2276"},
 224         {0x10A2,"LM3S2410"},
 225         {0x1059,"LM3S2412"},
 226         {0x1056,"LM3S2432"},
 227         {0x105A,"LM3S2533"},
 228         {0x10E1,"LM3S2601"},
 229         {0x10E0,"LM3S2608"},
 230         {0x1033,"LM3S2616"},
 231         {0x1057,"LM3S2620"},
 232         {0x1085,"LM3S2637"},
 233         {0x1053,"LM3S2651"},
 234         {0x1080,"LM3S2671"},
 235         {0x1050,"LM3S2678"},
 236         {0x10A4,"LM3S2730"},
 237         {0x1052,"LM3S2739"},
 238         {0x103A,"LM3S2776"},
 239         {0x106D,"LM3S2793"},
 240         {0x10E3,"LM3S2911"},
 241         {0x10E2,"LM3S2918"},
 242         {0x10ED,"LM3S2919"},
 243         {0x1054,"LM3S2939"},
 244         {0x108F,"LM3S2948"},
 245         {0x1058,"LM3S2950"},
 246         {0x1055,"LM3S2965"},
 247         {0x106C,"LM3S2B93"},
 248         {0x1094,"LM3S2D93"},
 249         {0x1093,"LM3S2U93"},
 250         {0x1008,"LM3S3634"},
 251         {0x1043,"LM3S3651"},
 252         {0x10C8,"LM3S3654"},
 253         {0x1044,"LM3S3739"},
 254         {0x1049,"LM3S3748"},
 255         {0x1045,"LM3S3749"},
 256         {0x1042,"LM3S3826"},
 257         {0x1041,"LM3S3J26"},
 258         {0x1040,"LM3S3N26"},
 259         {0x103F,"LM3S3W26"},
 260         {0x103E,"LM3S3Z26"},
 261         {0x1081,"LM3S5632"},
 262         {0x100C,"LM3S5651"},
 263         {0x108A,"LM3S5652"},
 264         {0x104D,"LM3S5656"},
 265         {0x1091,"LM3S5662"},
 266         {0x1096,"LM3S5732"},
 267         {0x1097,"LM3S5737"},
 268         {0x10A0,"LM3S5739"},
 269         {0x1099,"LM3S5747"},
 270         {0x10A7,"LM3S5749"},
 271         {0x109A,"LM3S5752"},
 272         {0x109C,"LM3S5762"},
 273         {0x1069,"LM3S5791"},
 274         {0x100B,"LM3S5951"},
 275         {0x104E,"LM3S5956"},
 276         {0x1068,"LM3S5B91"},
 277         {0x102E,"LM3S5C31"},
 278         {0x102C,"LM3S5C36"},
 279         {0x105E,"LM3S5C51"},
 280         {0x105B,"LM3S5C56"},
 281         {0x105F,"LM3S5D51"},
 282         {0x105C,"LM3S5D56"},
 283         {0x1087,"LM3S5D91"},
 284         {0x102D,"LM3S5G31"},
 285         {0x101F,"LM3S5G36"},
 286         {0x105D,"LM3S5G51"},
 287         {0x104F,"LM3S5G56"},
 288         {0x1009,"LM3S5K31"},
 289         {0x104A,"LM3S5K36"},
 290         {0x100A,"LM3S5P31"},
 291         {0x1048,"LM3S5P36"},
 292         {0x10B6,"LM3S5P3B"},
 293         {0x100D,"LM3S5P51"},
 294         {0x104C,"LM3S5P56"},
 295         {0x1007,"LM3S5R31"},
 296         {0x104B,"LM3S5R36"},
 297         {0x1047,"LM3S5T36"},
 298         {0x107F,"LM3S5U91"},
 299         {0x1046,"LM3S5Y36"},
 300         {0x10A1,"LM3S6100"},
 301         {0x1074,"LM3S6110"},
 302         {0x10A5,"LM3S6420"},
 303         {0x1082,"LM3S6422"},
 304         {0x1075,"LM3S6432"},
 305         {0x1076,"LM3S6537"},
 306         {0x1071,"LM3S6610"},
 307         {0x10E7,"LM3S6611"},
 308         {0x10E6,"LM3S6618"},
 309         {0x1083,"LM3S6633"},
 310         {0x108B,"LM3S6637"},
 311         {0x10A3,"LM3S6730"},
 312         {0x1077,"LM3S6753"},
 313         {0x10D1,"LM3S6816"},
 314         {0x10E9,"LM3S6911"},
 315         {0x10D3,"LM3S6916"},
 316         {0x10E8,"LM3S6918"},
 317         {0x1089,"LM3S6938"},
 318         {0x1072,"LM3S6950"},
 319         {0x1078,"LM3S6952"},
 320         {0x1073,"LM3S6965"},
 321         {0x10AA,"LM3S6C11"},
 322         {0x10AC,"LM3S6C65"},
 323         {0x109F,"LM3S6G11"},
 324         {0x10AB,"LM3S6G65"},
 325         {0x1064,"LM3S8530"},
 326         {0x108E,"LM3S8538"},
 327         {0x1061,"LM3S8630"},
 328         {0x1063,"LM3S8730"},
 329         {0x108D,"LM3S8733"},
 330         {0x1086,"LM3S8738"},
 331         {0x1065,"LM3S8930"},
 332         {0x108C,"LM3S8933"},
 333         {0x1088,"LM3S8938"},
 334         {0x10A6,"LM3S8962"},
 335         {0x1062,"LM3S8970"},
 336         {0x10D7,"LM3S8971"},
 337         {0x10AE,"LM3S8C62"},
 338         {0x10AD,"LM3S8G62"},
 339         {0x10CF,"LM3S9781"},
 340         {0x1067,"LM3S9790"},
 341         {0x106B,"LM3S9792"},
 342         {0x102D,"LM3S9971"},
 343         {0x1020,"LM3S9997"},
 344         {0x10D0,"LM3S9B81"},
 345         {0x1066,"LM3S9B90"},
 346         {0x106A,"LM3S9B92"},
 347         {0x106E,"LM3S9B95"},
 348         {0x106F,"LM3S9B96"},
 349         {0x101D,"LM3S9BN2"},
 350         {0x101E,"LM3S9BN5"},
 351         {0x101F,"LM3S9BN6"},
 352         {0x1070,"LM3S9C97"},
 353         {0x107A,"LM3S9CN5"},
 354         {0x10A9,"LM3S9D81"},
 355         {0x107E,"LM3S9D90"},
 356         {0x1092,"LM3S9D92"},
 357         {0x10C8,"LM3S9D95"},
 358         {0x109D,"LM3S9D96"},
 359         {0x107B,"LM3S9DN5"},
 360         {0x107C,"LM3S9DN6"},
 361         {0x1060,"LM3S9G97"},
 362         {0x1079,"LM3S9GN5"},
 363         {0x101B,"LM3S9L71"},
 364         {0x1018,"LM3S9L97"},
 365         {0x10A8,"LM3S9U81"},
 366         {0x107D,"LM3S9U90"},
 367         {0x1090,"LM3S9U92"},
 368         {0x10B7,"LM3S9U95"},
 369         {0x109B,"LM3S9U96"},
 370         {0,"Unknown part"}
 371 };
 372
 373 static char * StellarisClassname[7] =
 374 {
 375         "Sandstorm",
 376         "Fury",
 377         "Unknown",
 378         "DustDevil",
 379         "Tempest",
 380         "Unknown",
 381         "Firestorm"
 382 };
 383
 384 /***************************************************************************
 385 *       openocd command interface                                              *
 386 ***************************************************************************/
 387
 388 /* flash_bank stellaris <base> <size> 0 0 <target#>
 389  */
 390 FLASH_BANK_COMMAND_HANDLER(stellaris_flash_bank_command)
 391 {
 392         struct stellaris_flash_bank *stellaris_info;
 393
 394         if (CMD_ARGC < 6)
 395         {
 396                 LOG_WARNING("incomplete flash_bank stellaris configuration");
 397                 return ERROR_FLASH_BANK_INVALID;
 398         }
 399
 400         stellaris_info = calloc(sizeof(struct stellaris_flash_bank), 1);
 401         bank->base = 0x0;
 402         bank->driver_priv = stellaris_info;
 403
 404         stellaris_info->target_name = "Unknown target";
 405
 406         /* part wasn't probed for info yet */
 407         stellaris_info->did1 = 0;
 408
 409         /* TODO Specify the main crystal speed in kHz using an optional
 410          * argument; ditto, the speed of an external oscillator used
 411          * instead of a crystal.  Avoid programming flash using IOSC.
 412          */
 413         return ERROR_OK;
 414 }
 415
 416 static int get_stellaris_info(struct flash_bank *bank, char *buf, int buf_size)
 417 {
 418         int printed, device_class;
 419         struct stellaris_flash_bank *stellaris_info = bank->driver_priv;
 420
 421         if (stellaris_info->did1 == 0)
 422                 return ERROR_FLASH_BANK_NOT_PROBED;
 423
 424         /* Read main and master clock freqency register */
 425         stellaris_read_clock_info(bank);
 426
 427         if (DID0_VER(stellaris_info->did0) > 0)
 428         {
 429                 device_class = (stellaris_info->did0 >> 16) & 0xFF;
 430         }
 431         else
 432         {
 433                 device_class = 0;
 434         }
 435         printed = snprintf(buf,
 436                            buf_size,
 437                            "\nTI/LMI Stellaris information: Chip is "
 438                            "class %i (%s) %s rev %c%i\n",
 439                            device_class,
 440                            StellarisClassname[device_class],
 441                            stellaris_info->target_name,
 442                            (int)('A' + ((stellaris_info->did0 >> 8) & 0xFF)),
 443                            (int)((stellaris_info->did0) & 0xFF));
 444         buf += printed;
 445         buf_size -= printed;
 446
 447         printed = snprintf(buf,
 448                            buf_size,
 449                            "did1: 0x%8.8" PRIx32 ", arch: 0x%4.4" PRIx32
 450                            ", eproc: %s, ramsize: %ik, flashsize: %ik\n",
 451                            stellaris_info->did1,
 452                            stellaris_info->did1,
 453                            "ARMv7M",
 454                            (int)((1 + ((stellaris_info->dc0 >> 16) & 0xFFFF))/4),
 455                            (int)((1 + (stellaris_info->dc0 & 0xFFFF))*2));
 456         buf += printed;
 457         buf_size -= printed;
 458
 459         printed = snprintf(buf,
 460                            buf_size,
 461                            "master clock: %ikHz%s, "
 462                            "rcc is 0x%" PRIx32 ", rcc2 is 0x%" PRIx32 "\n",
 463                            (int)(stellaris_info->mck_freq / 1000),
 464                            stellaris_info->mck_desc,
 465                            stellaris_info->rcc,
 466                            stellaris_info->rcc2);
 467         buf += printed;
 468         buf_size -= printed;
 469
 470         if (stellaris_info->num_lockbits > 0)
 471         {
 472                 printed = snprintf(buf,
 473                                 buf_size,
 474                                 "pagesize: %" PRIi32 ", pages: %d, "
 475                                 "lockbits: %i, pages per lockbit: %i\n",
 476                                 stellaris_info->pagesize,
 477                                 (unsigned) stellaris_info->num_pages,
 478                                 stellaris_info->num_lockbits,
 479                                 (unsigned) stellaris_info->pages_in_lockregion);
 480                 buf += printed;
 481                 buf_size -= printed;
 482         }
 483         return ERROR_OK;
 484 }
 485
 486 /***************************************************************************
 487 *       chip identification and status                                         *
 488 ***************************************************************************/
 489
 490 /* Set the flash timimg register to match current clocking */
 491 static void stellaris_set_flash_timing(struct flash_bank *bank)
 492 {
 493         struct stellaris_flash_bank *stellaris_info = bank->driver_priv;
 494         struct target *target = bank->target;
 495         uint32_t usecrl = (stellaris_info->mck_freq/1000000ul-1);
 496
 497         LOG_DEBUG("usecrl = %i",(int)(usecrl));
 498         target_write_u32(target, SCB_BASE | USECRL, usecrl);
 499 }
 500
 501 static const unsigned rcc_xtal[32] = {
 502         [0x00] = 1000000,               /* no pll */
 503         [0x01] = 1843200,               /* no pll */
 504         [0x02] = 2000000,               /* no pll */
 505         [0x03] = 2457600,               /* no pll */
 506
 507         [0x04] = 3579545,
 508         [0x05] = 3686400,
 509         [0x06] = 4000000,               /* usb */
 510         [0x07] = 4096000,
 511
 512         [0x08] = 4915200,
 513         [0x09] = 5000000,               /* usb */
 514         [0x0a] = 5120000,
 515         [0x0b] = 6000000,               /* (reset) usb */
 516
 517         [0x0c] = 6144000,
 518         [0x0d] = 7372800,
 519         [0x0e] = 8000000,               /* usb */
 520         [0x0f] = 8192000,
 521
 522         /* parts before DustDevil use just 4 bits for xtal spec */
 523
 524         [0x10] = 10000000,              /* usb */
 525         [0x11] = 12000000,              /* usb */
 526         [0x12] = 12288000,
 527         [0x13] = 13560000,
 528
 529         [0x14] = 14318180,
 530         [0x15] = 16000000,              /* usb */
 531         [0x16] = 16384000,
 532 };
 533
 534 /** Read clock configuration and set stellaris_info->usec_clocks. */
 535 static void stellaris_read_clock_info(struct flash_bank *bank)
 536 {
 537         struct stellaris_flash_bank *stellaris_info = bank->driver_priv;
 538         struct target *target = bank->target;
 539         uint32_t rcc, rcc2, pllcfg, sysdiv, usesysdiv, bypass, oscsrc;
 540         unsigned xtal;
 541         unsigned long mainfreq;
 542
 543         target_read_u32(target, SCB_BASE | RCC, &rcc);
 544         LOG_DEBUG("Stellaris RCC %" PRIx32 "", rcc);
 545
 546         target_read_u32(target, SCB_BASE | RCC2, &rcc2);
 547         LOG_DEBUG("Stellaris RCC2 %" PRIx32 "", rcc);
 548
 549         target_read_u32(target, SCB_BASE | PLLCFG, &pllcfg);
 550         LOG_DEBUG("Stellaris PLLCFG %" PRIx32 "", pllcfg);
 551
 552         stellaris_info->rcc = rcc;
 553         stellaris_info->rcc = rcc2;
 554
 555         sysdiv = (rcc >> 23) & 0xF;
 556         usesysdiv = (rcc >> 22) & 0x1;
 557         bypass = (rcc >> 11) & 0x1;
 558         oscsrc = (rcc >> 4) & 0x3;
 559         xtal = (rcc >> 6) & stellaris_info->xtal_mask;
 560
 561         /* NOTE: post-Sandstorm parts have RCC2 which may override
 562          * parts of RCC ... with more sysdiv options, option for
 563          * 32768 Hz mainfreq, PLL controls.  On Sandstorm it reads
 564          * as zero, so the "use RCC2" flag is always clear.
 565          */
 566         if (rcc2 & (1 << 31)) {
 567                 sysdiv = (rcc2 >> 23) & 0x3F;
 568                 bypass = (rcc2 >> 11) & 0x1;
 569                 oscsrc = (rcc2 >> 4) & 0x7;
 570
 571                 /* FIXME Tempest parts have an additional lsb for
 572                  * fractional sysdiv (200 MHz / 2.5 == 80 MHz)
 573                  */
 574         }
 575
 576         stellaris_info->mck_desc = "";
 577
 578         switch (oscsrc)
 579         {
 580                 case 0:                         /* MOSC */
 581                         mainfreq = rcc_xtal[xtal];
 582                         break;
 583                 case 1:                         /* IOSC */
 584                         mainfreq = stellaris_info->iosc_freq;
 585                         stellaris_info->mck_desc = stellaris_info->iosc_desc;
 586                         break;
 587                 case 2:                         /* IOSC/4 */
 588                         mainfreq = stellaris_info->iosc_freq / 4;
 589                         stellaris_info->mck_desc = stellaris_info->iosc_desc;
 590                         break;
 591                 case 3:                         /* lowspeed */
 592                         /* Sandstorm doesn't have this 30K +/- 30% osc */
 593                         mainfreq = 30000;
 594                         stellaris_info->mck_desc = " (±30%)";
 595                         break;
 596                 case 8:                         /* hibernation osc */
 597                         /* not all parts support hibernation */
 598                         mainfreq = 32768;
 599                         break;
 600
 601                 default: /* NOTREACHED */
 602                         mainfreq = 0;
 603                         break;
 604         }
 605
 606         /* PLL is used if it's not bypassed; its output is 200 MHz
 607          * even when it runs at 400 MHz (adds divide-by-two stage).
 608          */
 609         if (!bypass)
 610                 mainfreq = 200000000;
 611
 612         if (usesysdiv)
 613                 stellaris_info->mck_freq = mainfreq/(1 + sysdiv);
 614         else
 615                 stellaris_info->mck_freq = mainfreq;
 616 }
 617
 618 /* Read device id register, main clock frequency register and fill in driver info structure */
 619 static int stellaris_read_part_info(struct flash_bank *bank)
 620 {
 621         struct stellaris_flash_bank *stellaris_info = bank->driver_priv;
 622         struct target *target = bank->target;
 623         uint32_t did0, did1, ver, fam;
 624         int i;
 625
 626         /* Read and parse chip identification register */
 627         target_read_u32(target, SCB_BASE | DID0, &did0);
 628         target_read_u32(target, SCB_BASE | DID1, &did1);
 629         target_read_u32(target, SCB_BASE | DC0, &stellaris_info->dc0);
 630         target_read_u32(target, SCB_BASE | DC1, &stellaris_info->dc1);
 631         LOG_DEBUG("did0 0x%" PRIx32 ", did1 0x%" PRIx32 ", dc0 0x%" PRIx32 ", dc1 0x%" PRIx32 "",
 632                   did0, did1, stellaris_info->dc0, stellaris_info->dc1);
 633
 634         ver = did0 >> 28;
 635         if ((ver != 0) && (ver != 1))
 636         {
 637                 LOG_WARNING("Unknown did0 version, cannot identify target");
 638                 return ERROR_FLASH_OPERATION_FAILED;
 639         }
 640
 641         if (did1 == 0)
 642         {
 643                 LOG_WARNING("Cannot identify target as a Stellaris");
 644                 return ERROR_FLASH_OPERATION_FAILED;
 645         }
 646
 647         ver = did1 >> 28;
 648         fam = (did1 >> 24) & 0xF;
 649         if (((ver != 0) && (ver != 1)) || (fam != 0))
 650         {
 651                 LOG_WARNING("Unknown did1 version/family.");
 652                 return ERROR_FLASH_OPERATION_FAILED;
 653         }
 654
 655         /* For Sandstorm, Fury, DustDevil:  current data sheets say IOSC
 656          * is 12 MHz, but some older parts have 15 MHz.  A few data sheets
 657          * even give _both_ numbers!  We'll use current numbers; IOSC is
 658          * always approximate.
 659          *
 660          * For Tempest:  IOSC is calibrated, 16 MHz
 661          */
 662         stellaris_info->iosc_freq = 12000000;
 663         stellaris_info->iosc_desc = " (±30%)";
 664         stellaris_info->xtal_mask = 0x0f;
 665
 666         switch ((did0 >> 28) & 0x7) {
 667         case 0:                         /* Sandstorm */
 668                 /*
 669                  * Current (2009-August) parts seem to be rev C2 and use 12 MHz.
 670                  * Parts before rev C0 used 15 MHz; some C0 parts use 15 MHz
 671                  * (LM3S618), but some other C0 parts are 12 MHz (LM3S811).
 672                  */
 673                 if (((did0 >> 8) & 0xff) < 2) {
 674                         stellaris_info->iosc_freq = 15000000;
 675                         stellaris_info->iosc_desc = " (±50%)";
 676                 }
 677                 break;
 678         case 1:
 679                 switch ((did0 >> 16) & 0xff) {
 680                 case 1:                 /* Fury */
 681                         break;
 682                 case 4:                 /* Tempest */
 683                         stellaris_info->iosc_freq = 16000000;   /* +/- 1% */
 684                         stellaris_info->iosc_desc = " (±1%)";
 685                         /* FALL THROUGH */
 686                 case 3:                 /* DustDevil */
 687                         stellaris_info->xtal_mask = 0x1f;
 688                         break;
 689                 default:
 690                         LOG_WARNING("Unknown did0 class");
 691                 }
 692                 break;
 693         default:
 694                 LOG_WARNING("Unknown did0 version");
 695                 break;
 696         }
 697
 698         for (i = 0; StellarisParts[i].partno; i++)
 699         {
 700                 if (StellarisParts[i].partno == ((did1 >> 16) & 0xFFFF))
 701                         break;
 702         }
 703
 704         stellaris_info->target_name = StellarisParts[i].partname;
 705
 706         stellaris_info->did0 = did0;
 707         stellaris_info->did1 = did1;
 708
 709         stellaris_info->num_lockbits = 1 + (stellaris_info->dc0 & 0xFFFF);
 710         stellaris_info->num_pages = 2 *(1 + (stellaris_info->dc0 & 0xFFFF));
 711         stellaris_info->pagesize = 1024;
 712         stellaris_info->pages_in_lockregion = 2;
 713
 714         /* REVISIT for at least Tempest parts, read NVMSTAT.FWB too.
 715          * That exposes a 32-word Flash Write Buffer ... enabling
 716          * writes of more than one word at a time.
 717          */
 718
 719         return ERROR_OK;
 720 }
 721
 722 /***************************************************************************
 723 *       flash operations                                                       *
 724 ***************************************************************************/
 725
 726 static int stellaris_protect_check(struct flash_bank *bank)
 727 {
 728         struct stellaris_flash_bank *stellaris = bank->driver_priv;
 729         int status = ERROR_OK;
 730         unsigned i;
 731         unsigned page;
 732
 733         if (stellaris->did1 == 0)
 734                 return ERROR_FLASH_BANK_NOT_PROBED;
 735
 736         for (i = 0; i < (unsigned) bank->num_sectors; i++)
 737                 bank->sectors[i].is_protected = -1;
 738
 739         /* Read each Flash Memory Protection Program Enable (FMPPE) register
 740          * to report any pages that we can't write.  Ignore the Read Enable
 741          * register (FMPRE).
 742          */
 743         for (i = 0, page = 0;
 744                         i < DIV_ROUND_UP(stellaris->num_lockbits, 32u);
 745                         i++) {
 746                 uint32_t lockbits;
 747
 748                 status = target_read_u32(bank->target,
 749                                 SCB_BASE + (i ? (FMPPE0 + 4 * i) : FMPPE),
 750                                 &lockbits);
 751                 LOG_DEBUG("FMPPE%d = %#8.8x (status %d)", i,
 752                                 (unsigned) lockbits, status);
 753                 if (status != ERROR_OK)
 754                         goto done;
 755
 756                 for (unsigned j = 0; j < 32; j++) {
 757                         unsigned k;
 758
 759                         for (k = 0; k < stellaris->pages_in_lockregion; k++) {
 760                                 if (page >= (unsigned) bank->num_sectors)
 761                                         goto done;
 762                                 bank->sectors[page++].is_protected =
 763                                                 !(lockbits & (1 << j));
 764                         }
 765                 }
 766         }
 767
 768 done:
 769         return status;
 770 }
 771
 772 static int stellaris_erase(struct flash_bank *bank, int first, int last)
 773 {
 774         int banknr;
 775         uint32_t flash_fmc, flash_cris;
 776         struct stellaris_flash_bank *stellaris_info = bank->driver_priv;
 777         struct target *target = bank->target;
 778
 779         if (bank->target->state != TARGET_HALTED)
 780         {
 781                 LOG_ERROR("Target not halted");
 782                 return ERROR_TARGET_NOT_HALTED;
 783         }
 784
 785         if (stellaris_info->did1 == 0)
 786                 return ERROR_FLASH_BANK_NOT_PROBED;
 787
 788         if ((first < 0) || (last < first) || (last >= (int)stellaris_info->num_pages))
 789         {
 790                 return ERROR_FLASH_SECTOR_INVALID;
 791         }
 792
 793         if ((first == 0) && (last == ((int)stellaris_info->num_pages-1)))
 794         {
 795                 return stellaris_mass_erase(bank);
 796         }
 797
 798         /* Refresh flash controller timing */
 799         stellaris_read_clock_info(bank);
 800         stellaris_set_flash_timing(bank);
 801
 802         /* Clear and disable flash programming interrupts */
 803         target_write_u32(target, FLASH_CIM, 0);
 804         target_write_u32(target, FLASH_MISC, PMISC | AMISC);
 805
 806         /* REVISIT this clobbers state set by any halted firmware ...
 807          * it might want to process those IRQs.
 808          */
 809
 810         for (banknr = first; banknr <= last; banknr++)
 811         {
 812                 /* Address is first word in page */
 813                 target_write_u32(target, FLASH_FMA, banknr * stellaris_info->pagesize);
 814                 /* Write erase command */
 815                 target_write_u32(target, FLASH_FMC, FMC_WRKEY | FMC_ERASE);
 816                 /* Wait until erase complete */
 817                 do
 818                 {
 819                         target_read_u32(target, FLASH_FMC, &flash_fmc);
 820                 }
 821                 while (flash_fmc & FMC_ERASE);
 822
 823                 /* Check acess violations */
 824                 target_read_u32(target, FLASH_CRIS, &flash_cris);
 825                 if (flash_cris & (AMASK))
 826                 {
 827                         LOG_WARNING("Error erasing flash page %i,  flash_cris 0x%" PRIx32 "", banknr, flash_cris);
 828                         target_write_u32(target, FLASH_CRIS, 0);
 829                         return ERROR_FLASH_OPERATION_FAILED;
 830                 }
 831
 832                 bank->sectors[banknr].is_erased = 1;
 833         }
 834
 835         return ERROR_OK;
 836 }
 837
 838 static int stellaris_protect(struct flash_bank *bank, int set, int first, int last)
 839 {
 840         uint32_t fmppe, flash_fmc, flash_cris;
 841         int lockregion;
 842
 843         struct stellaris_flash_bank *stellaris_info = bank->driver_priv;
 844         struct target *target = bank->target;
 845
 846         if (bank->target->state != TARGET_HALTED)
 847         {
 848                 LOG_ERROR("Target not halted");
 849                 return ERROR_TARGET_NOT_HALTED;
 850         }
 851
 852         if (!set)
 853         {
 854                 LOG_ERROR("Hardware doesn't support page-level unprotect. "
 855                         "Try the 'recover' command.");
 856                 return ERROR_INVALID_ARGUMENTS;
 857         }
 858
 859         if (stellaris_info->did1 == 0)
 860                 return ERROR_FLASH_BANK_NOT_PROBED;
 861
 862         /* lockregions are 2 pages ... must protect [even..odd] */
 863         if ((first < 0) || (first & 1)
 864                         || (last < first) || !(last & 1)
 865                         || (last >= 2 * stellaris_info->num_lockbits))
 866         {
 867                 LOG_ERROR("Can't protect unaligned or out-of-range pages.");
 868                 return ERROR_FLASH_SECTOR_INVALID;
 869         }
 870
 871         /* Refresh flash controller timing */
 872         stellaris_read_clock_info(bank);
 873         stellaris_set_flash_timing(bank);
 874
 875         /* convert from pages to lockregions */
 876         first /= 2;
 877         last /= 2;
 878
 879         /* FIXME this assumes single FMPPE, for a max of 64K of flash!!
 880          * Current parts can be much bigger.
 881          */
 882         if (last >= 32) {
 883                 LOG_ERROR("No support yet for protection > 64K");
 884                 return ERROR_FLASH_OPERATION_FAILED;
 885         }
 886
 887         target_read_u32(target, SCB_BASE | FMPPE, &fmppe);
 888
 889         for (lockregion = first; lockregion <= last; lockregion++)
 890                 fmppe &= ~(1 << lockregion);
 891
 892         /* Clear and disable flash programming interrupts */
 893         target_write_u32(target, FLASH_CIM, 0);
 894         target_write_u32(target, FLASH_MISC, PMISC | AMISC);
 895
 896         /* REVISIT this clobbers state set by any halted firmware ...
 897          * it might want to process those IRQs.
 898          */
 899
 900         LOG_DEBUG("fmppe 0x%" PRIx32 "",fmppe);
 901         target_write_u32(target, SCB_BASE | FMPPE, fmppe);
 902
 903         /* Commit FMPPE */
 904         target_write_u32(target, FLASH_FMA, 1);
 905
 906         /* Write commit command */
 907         /* REVISIT safety check, since this cannot be undone
 908          * except by the "Recover a locked device" procedure.
 909          * REVISIT DustDevil-A0 parts have an erratum making FMPPE commits
 910          * inadvisable ... it makes future mass erase operations fail.
 911          */
 912         LOG_WARNING("Flash protection cannot be removed once committed, commit is NOT executed !");
 913         /* target_write_u32(target, FLASH_FMC, FMC_WRKEY | FMC_COMT); */
 914
 915         /* Wait until erase complete */
 916         do
 917         {
 918                 target_read_u32(target, FLASH_FMC, &flash_fmc);
 919         }
 920         while (flash_fmc & FMC_COMT);
 921
 922         /* Check acess violations */
 923         target_read_u32(target, FLASH_CRIS, &flash_cris);
 924         if (flash_cris & (AMASK))
 925         {
 926                 LOG_WARNING("Error setting flash page protection,  flash_cris 0x%" PRIx32 "", flash_cris);
 927                 target_write_u32(target, FLASH_CRIS, 0);
 928                 return ERROR_FLASH_OPERATION_FAILED;
 929         }
 930
 931         return ERROR_OK;
 932 }
 933
 934 /* see contib/loaders/flash/stellaris.s for src */
 935
 936 static const uint8_t stellaris_write_code[] =
 937 {
 938 /*
 939         Call with :
 940         r0 = buffer address
 941         r1 = destination address
 942         r2 = bytecount (in) - endaddr (work)
 943
 944         Used registers:
 945         r3 = pFLASH_CTRL_BASE
 946         r4 = FLASHWRITECMD
 947         r5 = #1
 948         r6 = bytes written
 949         r7 = temp reg
 950 */
 951         0x07,0x4B,                      /* ldr r3,pFLASH_CTRL_BASE */
 952         0x08,0x4C,                      /* ldr r4,FLASHWRITECMD */
 953         0x01,0x25,                      /* movs r5, 1 */
 954         0x00,0x26,                      /* movs r6, #0 */
 955 /* mainloop: */
 956         0x19,0x60,                      /* str  r1, [r3, #0] */
 957         0x87,0x59,                      /* ldr  r7, [r0, r6] */
 958         0x5F,0x60,                      /* str  r7, [r3, #4] */
 959         0x9C,0x60,                      /* str  r4, [r3, #8] */
 960 /* waitloop: */
 961         0x9F,0x68,                      /* ldr  r7, [r3, #8] */
 962         0x2F,0x42,                      /* tst  r7, r5 */
 963         0xFC,0xD1,                      /* bne  waitloop */
 964         0x04,0x31,                      /* adds r1, r1, #4 */
 965         0x04,0x36,                      /* adds r6, r6, #4 */
 966         0x96,0x42,                      /* cmp  r6, r2 */
 967         0xF4,0xD1,                      /* bne  mainloop */
 968         0x00,0xBE,              /* bkpt #0 */
 969 /* pFLASH_CTRL_BASE: */
 970         0x00,0xD0,0x0F,0x40,    /* .word        0x400FD000 */
 971 /* FLASHWRITECMD: */
 972         0x01,0x00,0x42,0xA4     /* .word        0xA4420001 */
 973 };
 974
 975 static int stellaris_write_block(struct flash_bank *bank,
 976                 uint8_t *buffer, uint32_t offset, uint32_t wcount)
 977 {
 978         struct target *target = bank->target;
 979         uint32_t buffer_size = 16384;
 980         struct working_area *source;
 981         struct working_area *write_algorithm;
 982         uint32_t address = bank->base + offset;
 983         struct reg_param reg_params[3];
 984         struct armv7m_algorithm armv7m_info;
 985         int retval = ERROR_OK;
 986
 987         /* power of two, and multiple of word size */
 988         static const unsigned buf_min = 128;
 989
 990         /* for small buffers it's faster not to download an algorithm */
 991         if (wcount * 4 < buf_min)
 992                 return ERROR_TARGET_RESOURCE_NOT_AVAILABLE;
 993
 994         LOG_DEBUG("(bank=%p buffer=%p offset=%08" PRIx32 " wcount=%08" PRIx32 "",
 995                         bank, buffer, offset, wcount);
 996
 997         /* flash write code */
 998         if (target_alloc_working_area(target, sizeof(stellaris_write_code), &write_algorithm) != ERROR_OK)
 999         {
1000                 LOG_DEBUG("no working area for block memory writes");
1001                 return ERROR_TARGET_RESOURCE_NOT_AVAILABLE;
1002         };
1003
1004         /* plus a buffer big enough for this data */
1005         if (wcount * 4 < buffer_size)
1006                 buffer_size = wcount * 4;
1007
1008         /* memory buffer */
1009         while (target_alloc_working_area_try(target, buffer_size, &source) != ERROR_OK)
1010         {
1011                 buffer_size /= 2;
1012                 if (buffer_size <= buf_min)
1013                 {
1014                         target_free_working_area(target, write_algorithm);
1015                         return ERROR_TARGET_RESOURCE_NOT_AVAILABLE;
1016                 }
1017                 LOG_DEBUG("retry target_alloc_working_area(%s, size=%u)",
1018                                 target_name(target), (unsigned) buffer_size);
1019         };
1020
1021         retval = target_write_buffer(target, write_algorithm->address,
1022                         sizeof(stellaris_write_code),
1023                         (uint8_t *) stellaris_write_code);
1024
1025         armv7m_info.common_magic = ARMV7M_COMMON_MAGIC;
1026         armv7m_info.core_mode = ARMV7M_MODE_ANY;
1027
1028         init_reg_param(&reg_params[0], "r0", 32, PARAM_OUT);
1029         init_reg_param(&reg_params[1], "r1", 32, PARAM_OUT);
1030         init_reg_param(&reg_params[2], "r2", 32, PARAM_OUT);
1031
1032         while (wcount > 0)
1033         {
1034                 uint32_t thisrun_count = (wcount > (buffer_size / 4)) ? (buffer_size / 4) : wcount;
1035
1036                 target_write_buffer(target, source->address, thisrun_count * 4, buffer);
1037
1038                 buf_set_u32(reg_params[0].value, 0, 32, source->address);
1039                 buf_set_u32(reg_params[1].value, 0, 32, address);
1040                 buf_set_u32(reg_params[2].value, 0, 32, 4*thisrun_count);
1041                 LOG_DEBUG("Algorithm flash write %u words to 0x%" PRIx32
1042                                 ", %u remaining",
1043                                 (unsigned) thisrun_count, address,
1044                                 (unsigned) (wcount - thisrun_count));
1045                 retval = target_run_algorithm(target, 0, NULL, 3, reg_params,
1046                                 write_algorithm->address,
1047                                 0,
1048                                 10000, &armv7m_info);
1049                 if (retval != ERROR_OK)
1050                 {
1051                         LOG_ERROR("error %d executing stellaris "
1052                                         "flash write algorithm",
1053                                         retval);
1054                         retval = ERROR_FLASH_OPERATION_FAILED;
1055                         break;
1056                 }
1057
1058                 buffer += thisrun_count * 4;
1059                 address += thisrun_count * 4;
1060                 wcount -= thisrun_count;
1061         }
1062
1063         /* REVISIT we could speed up writing multi-section images by
1064          * not freeing the initialized write_algorithm this way.
1065          */
1066
1067         target_free_working_area(target, write_algorithm);
1068         target_free_working_area(target, source);
1069
1070         destroy_reg_param(&reg_params[0]);
1071         destroy_reg_param(&reg_params[1]);
1072         destroy_reg_param(&reg_params[2]);
1073
1074         return retval;
1075 }
1076
1077 static int stellaris_write(struct flash_bank *bank, uint8_t *buffer, uint32_t offset, uint32_t count)
1078 {
1079         struct stellaris_flash_bank *stellaris_info = bank->driver_priv;
1080         struct target *target = bank->target;
1081         uint32_t address = offset;
1082         uint32_t flash_cris, flash_fmc;
1083         uint32_t words_remaining = (count / 4);
1084         uint32_t bytes_remaining = (count & 0x00000003);
1085         uint32_t bytes_written = 0;
1086         int retval;
1087
1088         if (bank->target->state != TARGET_HALTED)
1089         {
1090                 LOG_ERROR("Target not halted");
1091                 return ERROR_TARGET_NOT_HALTED;
1092         }
1093
1094         LOG_DEBUG("(bank=%p buffer=%p offset=%08" PRIx32 " count=%08" PRIx32 "",
1095                         bank, buffer, offset, count);
1096
1097         if (stellaris_info->did1 == 0)
1098                 return ERROR_FLASH_BANK_NOT_PROBED;
1099
1100         if (offset & 0x3)
1101         {
1102                 LOG_WARNING("offset size must be word aligned");
1103                 return ERROR_FLASH_DST_BREAKS_ALIGNMENT;
1104         }
1105
1106         if (offset + count > bank->size)
1107                 return ERROR_FLASH_DST_OUT_OF_BANK;
1108
1109         /* Refresh flash controller timing */
1110         stellaris_read_clock_info(bank);
1111         stellaris_set_flash_timing(bank);
1112
1113         /* Clear and disable flash programming interrupts */
1114         target_write_u32(target, FLASH_CIM, 0);
1115         target_write_u32(target, FLASH_MISC, PMISC | AMISC);
1116
1117         /* REVISIT this clobbers state set by any halted firmware ...
1118          * it might want to process those IRQs.
1119          */
1120
1121         /* multiple words to be programmed? */
1122         if (words_remaining > 0)
1123         {
1124                 /* try using a block write */
1125                 retval = stellaris_write_block(bank, buffer, offset,
1126                                 words_remaining);
1127                 if (retval != ERROR_OK)
1128                 {
1129                         if (retval == ERROR_TARGET_RESOURCE_NOT_AVAILABLE)
1130                         {
1131                                 LOG_DEBUG("writing flash word-at-a-time");
1132                         }
1133                         else if (retval == ERROR_FLASH_OPERATION_FAILED)
1134                         {
1135                                 /* if an error occured, we examine the reason, and quit */
1136                                 target_read_u32(target, FLASH_CRIS, &flash_cris);
1137
1138                                 LOG_ERROR("flash writing failed with CRIS: 0x%" PRIx32 "", flash_cris);
1139                                 return ERROR_FLASH_OPERATION_FAILED;
1140                         }
1141                 }
1142                 else
1143                 {
1144                         buffer += words_remaining * 4;
1145                         address += words_remaining * 4;
1146                         words_remaining = 0;
1147                 }
1148         }
1149
1150         while (words_remaining > 0)
1151         {
1152                 if (!(address & 0xff))
1153                         LOG_DEBUG("0x%" PRIx32 "", address);
1154
1155                 /* Program one word */
1156                 target_write_u32(target, FLASH_FMA, address);
1157                 target_write_buffer(target, FLASH_FMD, 4, buffer);
1158                 target_write_u32(target, FLASH_FMC, FMC_WRKEY | FMC_WRITE);
1159                 /* LOG_DEBUG("0x%x 0x%x 0x%x",address,buf_get_u32(buffer, 0, 32),FMC_WRKEY | FMC_WRITE); */
1160                 /* Wait until write complete */
1161                 do
1162                 {
1163                         target_read_u32(target, FLASH_FMC, &flash_fmc);
1164                 } while (flash_fmc & FMC_WRITE);
1165
1166                 buffer += 4;
1167                 address += 4;
1168                 words_remaining--;
1169         }
1170
1171         if (bytes_remaining)
1172         {
1173                 uint8_t last_word[4] = {0xff, 0xff, 0xff, 0xff};
1174                 int i = 0;
1175
1176                 while (bytes_remaining > 0)
1177                 {
1178                         last_word[i++] = *(buffer + bytes_written);
1179                         bytes_remaining--;
1180                         bytes_written++;
1181                 }
1182
1183                 if (!(address & 0xff))
1184                         LOG_DEBUG("0x%" PRIx32 "", address);
1185
1186                 /* Program one word */
1187                 target_write_u32(target, FLASH_FMA, address);
1188                 target_write_buffer(target, FLASH_FMD, 4, last_word);
1189                 target_write_u32(target, FLASH_FMC, FMC_WRKEY | FMC_WRITE);
1190                 /* LOG_DEBUG("0x%x 0x%x 0x%x",address,buf_get_u32(buffer, 0, 32),FMC_WRKEY | FMC_WRITE); */
1191                 /* Wait until write complete */
1192                 do
1193                 {
1194                         target_read_u32(target, FLASH_FMC, &flash_fmc);
1195                 } while (flash_fmc & FMC_WRITE);
1196         }
1197
1198         /* Check access violations */
1199         target_read_u32(target, FLASH_CRIS, &flash_cris);
1200         if (flash_cris & (AMASK))
1201         {
1202                 LOG_DEBUG("flash_cris 0x%" PRIx32 "", flash_cris);
1203                 return ERROR_FLASH_OPERATION_FAILED;
1204         }
1205         return ERROR_OK;
1206 }
1207
1208 static int stellaris_probe(struct flash_bank *bank)
1209 {
1210         struct stellaris_flash_bank *stellaris_info = bank->driver_priv;
1211         int retval;
1212
1213         /* If this is a stellaris chip, it has flash; probe() is just
1214          * to figure out how much is present.  Only do it once.
1215          */
1216         if (stellaris_info->did1 != 0)
1217                 return ERROR_OK;
1218
1219         /* stellaris_read_part_info() already handled error checking and
1220          * reporting.  Note that it doesn't write, so we don't care about
1221          * whether the target is halted or not.
1222          */
1223         retval = stellaris_read_part_info(bank);
1224         if (retval != ERROR_OK)
1225                 return retval;
1226
1227         if (bank->sectors)
1228         {
1229                 free(bank->sectors);
1230                 bank->sectors = NULL;
1231         }
1232
1233         /* provide this for the benefit of the NOR flash framework */
1234         bank->size = 1024 * stellaris_info->num_pages;
1235         bank->num_sectors = stellaris_info->num_pages;
1236         bank->sectors = calloc(bank->num_sectors, sizeof(struct flash_sector));
1237         for (int i = 0; i < bank->num_sectors; i++)
1238         {
1239                 bank->sectors[i].offset = i * stellaris_info->pagesize;
1240                 bank->sectors[i].size = stellaris_info->pagesize;
1241                 bank->sectors[i].is_erased = -1;
1242                 bank->sectors[i].is_protected = -1;
1243         }
1244
1245         return retval;
1246 }
1247
1248 static int stellaris_mass_erase(struct flash_bank *bank)
1249 {
1250         struct target *target = NULL;
1251         struct stellaris_flash_bank *stellaris_info = NULL;
1252         uint32_t flash_fmc;
1253
1254         stellaris_info = bank->driver_priv;
1255         target = bank->target;
1256
1257         if (target->state != TARGET_HALTED)
1258         {
1259                 LOG_ERROR("Target not halted");
1260                 return ERROR_TARGET_NOT_HALTED;
1261         }
1262
1263         if (stellaris_info->did1 == 0)
1264                 return ERROR_FLASH_BANK_NOT_PROBED;
1265
1266         /* Refresh flash controller timing */
1267         stellaris_read_clock_info(bank);
1268         stellaris_set_flash_timing(bank);
1269
1270         /* Clear and disable flash programming interrupts */
1271         target_write_u32(target, FLASH_CIM, 0);
1272         target_write_u32(target, FLASH_MISC, PMISC | AMISC);
1273
1274         /* REVISIT this clobbers state set by any halted firmware ...
1275          * it might want to process those IRQs.
1276          */
1277
1278         target_write_u32(target, FLASH_FMA, 0);
1279         target_write_u32(target, FLASH_FMC, FMC_WRKEY | FMC_MERASE);
1280         /* Wait until erase complete */
1281         do
1282         {
1283                 target_read_u32(target, FLASH_FMC, &flash_fmc);
1284         }
1285         while (flash_fmc & FMC_MERASE);
1286
1287         /* if device has > 128k, then second erase cycle is needed
1288          * this is only valid for older devices, but will not hurt */
1289         if (stellaris_info->num_pages * stellaris_info->pagesize > 0x20000)
1290         {
1291                 target_write_u32(target, FLASH_FMA, 0x20000);
1292                 target_write_u32(target, FLASH_FMC, FMC_WRKEY | FMC_MERASE);
1293                 /* Wait until erase complete */
1294                 do
1295                 {
1296                         target_read_u32(target, FLASH_FMC, &flash_fmc);
1297                 }
1298                 while (flash_fmc & FMC_MERASE);
1299         }
1300
1301         return ERROR_OK;
1302 }
1303
1304 COMMAND_HANDLER(stellaris_handle_mass_erase_command)
1305 {
1306         int i;
1307
1308         if (CMD_ARGC < 1)
1309         {
1310                 command_print(CMD_CTX, "stellaris mass_erase <bank>");
1311                 return ERROR_OK;
1312         }
1313
1314         struct flash_bank *bank;
1315         int retval = CALL_COMMAND_HANDLER(flash_command_get_bank, 0, &bank);
1316         if (ERROR_OK != retval)
1317                 return retval;
1318
1319         if (stellaris_mass_erase(bank) == ERROR_OK)
1320         {
1321                 /* set all sectors as erased */
1322                 for (i = 0; i < bank->num_sectors; i++)
1323                 {
1324                         bank->sectors[i].is_erased = 1;
1325                 }
1326
1327                 command_print(CMD_CTX, "stellaris mass erase complete");
1328         }
1329         else
1330         {
1331                 command_print(CMD_CTX, "stellaris mass erase failed");
1332         }
1333
1334         return ERROR_OK;
1335 }
1336
1337 /**
1338  * Perform the Stellaris "Recovering a 'Locked' Device procedure.
1339  * This performs a mass erase and then restores all nonvolatile registers
1340  * (including USER_* registers and flash lock bits) to their defaults.
1341  * Accordingly, flash can be reprogrammed, and JTAG can be used.
1342  *
1343  * NOTE that DustDevil parts (at least rev A0 silicon) have errata which
1344  * can affect this operation if flash protection has been enabled.
1345  */
1346 COMMAND_HANDLER(stellaris_handle_recover_command)
1347 {
1348         struct flash_bank *bank;
1349         int retval;
1350
1351         retval = CALL_COMMAND_HANDLER(flash_command_get_bank, 0, &bank);
1352         if (retval != ERROR_OK)
1353                 return retval;
1354
1355         /* REVISIT ... it may be worth sanity checking that the AP is
1356          * inactive before we start.  ARM documents that switching a DP's
1357          * mode while it's active can cause fault modes that need a power
1358          * cycle to recover.
1359          */
1360
1361         /* assert SRST */
1362         if (!(jtag_get_reset_config() & RESET_HAS_SRST)) {
1363                 LOG_ERROR("Can't recover Stellaris flash without SRST");
1364                 return ERROR_FAIL;
1365         }
1366         jtag_add_reset(0, 1);
1367
1368         for (int i = 0; i < 5; i++) {
1369                 retval = dap_to_swd(bank->target);
1370                 if (retval != ERROR_OK)
1371                         goto done;
1372
1373                 retval = dap_to_jtag(bank->target);
1374                 if (retval != ERROR_OK)
1375                         goto done;
1376         }
1377
1378         /* de-assert SRST */
1379         jtag_add_reset(0, 0);
1380         retval = jtag_execute_queue();
1381
1382         /* wait 400+ msec ... OK, "1+ second" is simpler */
1383         usleep(1000);
1384
1385         /* USER INTERVENTION required for the power cycle
1386          * Restarting OpenOCD is likely needed because of mode switching.
1387          */
1388         LOG_INFO("USER ACTION:  "
1389                 "power cycle Stellaris chip, then restart OpenOCD.");
1390
1391 done:
1392         return retval;
1393 }
1394
1395 static const struct command_registration stellaris_exec_command_handlers[] = {
1396         {
1397                 .name = "mass_erase",
1398                 .handler = stellaris_handle_mass_erase_command,
1399                 .mode = COMMAND_EXEC,
1400                 .usage = "bank_id",
1401                 .help = "erase entire device",
1402         },
1403         {
1404                 .name = "recover",
1405                 .handler = stellaris_handle_recover_command,
1406                 .mode = COMMAND_EXEC,
1407                 .usage = "bank_id",
1408                 .help = "recover (and erase) locked device",
1409         },
1410         COMMAND_REGISTRATION_DONE
1411 };
1412 static const struct command_registration stellaris_command_handlers[] = {
1413         {
1414                 .name = "stellaris",
1415                 .mode = COMMAND_EXEC,
1416                 .help = "Stellaris flash command group",
1417                 .chain = stellaris_exec_command_handlers,
1418         },
1419         COMMAND_REGISTRATION_DONE
1420 };
1421
1422 struct flash_driver stellaris_flash = {
1423         .name = "stellaris",
1424         .commands = stellaris_command_handlers,
1425         .flash_bank_command = stellaris_flash_bank_command,
1426         .erase = stellaris_erase,
1427         .protect = stellaris_protect,
1428         .write = stellaris_write,
1429         .read = default_flash_read,
1430         .probe = stellaris_probe,
1431         .auto_probe = stellaris_probe,
1432         .erase_check = default_flash_mem_blank_check,
1433         .protect_check = stellaris_protect_check,
1434         .info = get_stellaris_info,
1435 };