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
  28 #ifdef HAVE_CONFIG_H
  29 #include "config.h"
  30 #endif
  31
  32 #include "imp.h"
  33 #include <target/algorithm.h>
  34 #include <target/armv7m.h>
  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 static void stellaris_read_clock_info(struct flash_bank *bank);
  92 static int stellaris_mass_erase(struct flash_bank *bank);
  93
  94 struct stellaris_flash_bank {
  95         /* chip id register */
  96         uint32_t did0;
  97         uint32_t did1;
  98         uint32_t dc0;
  99         uint32_t dc1;
 100
 101         const char *target_name;
 102         uint8_t target_class;
 103
 104         uint32_t sramsiz;
 105         uint32_t flshsz;
 106         /* flash geometry */
 107         uint32_t num_pages;
 108         uint32_t pagesize;
 109         uint32_t pages_in_lockregion;
 110
 111         /* nv memory bits */
 112         uint16_t num_lockbits;
 113
 114         /* main clock status */
 115         uint32_t rcc;
 116         uint32_t rcc2;
 117         uint8_t  mck_valid;
 118         uint8_t  xtal_mask;
 119         uint32_t iosc_freq;
 120         uint32_t mck_freq;
 121         const char *iosc_desc;
 122         const char *mck_desc;
 123 };
 124
 125 /* Autogenerated by contrib/gen-stellaris-part-header.pl */
 126 /* From Stellaris Firmware Development Package revision 8049 */
 127 static struct {
 128         uint8_t class;
 129         uint8_t partno;
 130         const char *partname;
 131 } StellarisParts[] = {
 132         {0x00, 0x01, "LM3S101"},
 133         {0x00, 0x02, "LM3S102"},
 134         {0x01, 0xBF, "LM3S1110"},
 135         {0x01, 0xC3, "LM3S1133"},
 136         {0x01, 0xC5, "LM3S1138"},
 137         {0x01, 0xC1, "LM3S1150"},
 138         {0x01, 0xC4, "LM3S1162"},
 139         {0x01, 0xC2, "LM3S1165"},
 140         {0x01, 0xEC, "LM3S1166"},
 141         {0x01, 0xC6, "LM3S1332"},
 142         {0x01, 0xBC, "LM3S1435"},
 143         {0x01, 0xBA, "LM3S1439"},
 144         {0x01, 0xBB, "LM3S1512"},
 145         {0x01, 0xC7, "LM3S1538"},
 146         {0x01, 0xDB, "LM3S1601"},
 147         {0x03, 0x06, "LM3S1607"},
 148         {0x01, 0xDA, "LM3S1608"},
 149         {0x01, 0xC0, "LM3S1620"},
 150         {0x04, 0xCD, "LM3S1621"},
 151         {0x03, 0x03, "LM3S1625"},
 152         {0x03, 0x04, "LM3S1626"},
 153         {0x03, 0x05, "LM3S1627"},
 154         {0x01, 0xB3, "LM3S1635"},
 155         {0x01, 0xEB, "LM3S1636"},
 156         {0x01, 0xBD, "LM3S1637"},
 157         {0x04, 0xB1, "LM3S1651"},
 158         {0x01, 0xB9, "LM3S1751"},
 159         {0x03, 0x10, "LM3S1776"},
 160         {0x04, 0x16, "LM3S1811"},
 161         {0x04, 0x3D, "LM3S1816"},
 162         {0x01, 0xB4, "LM3S1850"},
 163         {0x01, 0xDD, "LM3S1911"},
 164         {0x01, 0xDC, "LM3S1918"},
 165         {0x01, 0xB7, "LM3S1937"},
 166         {0x01, 0xBE, "LM3S1958"},
 167         {0x01, 0xB5, "LM3S1960"},
 168         {0x01, 0xB8, "LM3S1968"},
 169         {0x01, 0xEA, "LM3S1969"},
 170         {0x04, 0xCE, "LM3S1B21"},
 171         {0x06, 0xCA, "LM3S1C21"},
 172         {0x06, 0xCB, "LM3S1C26"},
 173         {0x06, 0x98, "LM3S1C58"},
 174         {0x06, 0xB0, "LM3S1D21"},
 175         {0x06, 0xCC, "LM3S1D26"},
 176         {0x06, 0x1D, "LM3S1F11"},
 177         {0x06, 0x1B, "LM3S1F16"},
 178         {0x06, 0xAF, "LM3S1G21"},
 179         {0x06, 0x95, "LM3S1G58"},
 180         {0x06, 0x1E, "LM3S1H11"},
 181         {0x06, 0x1C, "LM3S1H16"},
 182         {0x04, 0x0F, "LM3S1J11"},
 183         {0x04, 0x3C, "LM3S1J16"},
 184         {0x04, 0x0E, "LM3S1N11"},
 185         {0x04, 0x3B, "LM3S1N16"},
 186         {0x04, 0xB2, "LM3S1P51"},
 187         {0x04, 0x9E, "LM3S1R21"},
 188         {0x04, 0xC9, "LM3S1R26"},
 189         {0x04, 0x30, "LM3S1W16"},
 190         {0x04, 0x2F, "LM3S1Z16"},
 191         {0x01, 0xD4, "LM3S2016"},
 192         {0x01, 0x51, "LM3S2110"},
 193         {0x01, 0x84, "LM3S2139"},
 194         {0x03, 0x39, "LM3S2276"},
 195         {0x01, 0xA2, "LM3S2410"},
 196         {0x01, 0x59, "LM3S2412"},
 197         {0x01, 0x56, "LM3S2432"},
 198         {0x01, 0x5A, "LM3S2533"},
 199         {0x01, 0xE1, "LM3S2601"},
 200         {0x01, 0xE0, "LM3S2608"},
 201         {0x03, 0x33, "LM3S2616"},
 202         {0x01, 0x57, "LM3S2620"},
 203         {0x01, 0x85, "LM3S2637"},
 204         {0x01, 0x53, "LM3S2651"},
 205         {0x03, 0x80, "LM3S2671"},
 206         {0x03, 0x50, "LM3S2678"},
 207         {0x01, 0xA4, "LM3S2730"},
 208         {0x01, 0x52, "LM3S2739"},
 209         {0x03, 0x3A, "LM3S2776"},
 210         {0x04, 0x6D, "LM3S2793"},
 211         {0x01, 0xE3, "LM3S2911"},
 212         {0x01, 0xE2, "LM3S2918"},
 213         {0x01, 0xED, "LM3S2919"},
 214         {0x01, 0x54, "LM3S2939"},
 215         {0x01, 0x8F, "LM3S2948"},
 216         {0x01, 0x58, "LM3S2950"},
 217         {0x01, 0x55, "LM3S2965"},
 218         {0x04, 0x6C, "LM3S2B93"},
 219         {0x06, 0x94, "LM3S2D93"},
 220         {0x06, 0x93, "LM3S2U93"},
 221         {0x00, 0x19, "LM3S300"},
 222         {0x00, 0x11, "LM3S301"},
 223         {0x00, 0x1A, "LM3S308"},
 224         {0x00, 0x12, "LM3S310"},
 225         {0x00, 0x13, "LM3S315"},
 226         {0x00, 0x14, "LM3S316"},
 227         {0x00, 0x17, "LM3S317"},
 228         {0x00, 0x15, "LM3S328"},
 229         {0x03, 0x08, "LM3S3634"},
 230         {0x03, 0x43, "LM3S3651"},
 231         {0x04, 0xC8, "LM3S3654"},
 232         {0x03, 0x44, "LM3S3739"},
 233         {0x03, 0x49, "LM3S3748"},
 234         {0x03, 0x45, "LM3S3749"},
 235         {0x04, 0x42, "LM3S3826"},
 236         {0x04, 0x41, "LM3S3J26"},
 237         {0x04, 0x40, "LM3S3N26"},
 238         {0x04, 0x3F, "LM3S3W26"},
 239         {0x04, 0x3E, "LM3S3Z26"},
 240         {0x03, 0x81, "LM3S5632"},
 241         {0x04, 0x0C, "LM3S5651"},
 242         {0x03, 0x8A, "LM3S5652"},
 243         {0x04, 0x4D, "LM3S5656"},
 244         {0x03, 0x91, "LM3S5662"},
 245         {0x03, 0x96, "LM3S5732"},
 246         {0x03, 0x97, "LM3S5737"},
 247         {0x03, 0xA0, "LM3S5739"},
 248         {0x03, 0x99, "LM3S5747"},
 249         {0x03, 0xA7, "LM3S5749"},
 250         {0x03, 0x9A, "LM3S5752"},
 251         {0x03, 0x9C, "LM3S5762"},
 252         {0x04, 0x69, "LM3S5791"},
 253         {0x04, 0x0B, "LM3S5951"},
 254         {0x04, 0x4E, "LM3S5956"},
 255         {0x04, 0x68, "LM3S5B91"},
 256         {0x06, 0x2E, "LM3S5C31"},
 257         {0x06, 0x2C, "LM3S5C36"},
 258         {0x06, 0x5E, "LM3S5C51"},
 259         {0x06, 0x5B, "LM3S5C56"},
 260         {0x06, 0x5F, "LM3S5D51"},
 261         {0x06, 0x5C, "LM3S5D56"},
 262         {0x06, 0x87, "LM3S5D91"},
 263         {0x06, 0x2D, "LM3S5G31"},
 264         {0x06, 0x1F, "LM3S5G36"},
 265         {0x06, 0x5D, "LM3S5G51"},
 266         {0x06, 0x4F, "LM3S5G56"},
 267         {0x04, 0x09, "LM3S5K31"},
 268         {0x04, 0x4A, "LM3S5K36"},
 269         {0x04, 0x0A, "LM3S5P31"},
 270         {0x04, 0x48, "LM3S5P36"},
 271         {0x04, 0xB6, "LM3S5P3B"},
 272         {0x04, 0x0D, "LM3S5P51"},
 273         {0x04, 0x4C, "LM3S5P56"},
 274         {0x04, 0x07, "LM3S5R31"},
 275         {0x04, 0x4B, "LM3S5R36"},
 276         {0x04, 0x47, "LM3S5T36"},
 277         {0x06, 0x7F, "LM3S5U91"},
 278         {0x04, 0x46, "LM3S5Y36"},
 279         {0x00, 0x2A, "LM3S600"},
 280         {0x00, 0x21, "LM3S601"},
 281         {0x00, 0x2B, "LM3S608"},
 282         {0x00, 0x22, "LM3S610"},
 283         {0x01, 0xA1, "LM3S6100"},
 284         {0x00, 0x23, "LM3S611"},
 285         {0x01, 0x74, "LM3S6110"},
 286         {0x00, 0x24, "LM3S612"},
 287         {0x00, 0x25, "LM3S613"},
 288         {0x00, 0x26, "LM3S615"},
 289         {0x00, 0x28, "LM3S617"},
 290         {0x00, 0x29, "LM3S618"},
 291         {0x00, 0x27, "LM3S628"},
 292         {0x01, 0xA5, "LM3S6420"},
 293         {0x01, 0x82, "LM3S6422"},
 294         {0x01, 0x75, "LM3S6432"},
 295         {0x01, 0x76, "LM3S6537"},
 296         {0x01, 0x71, "LM3S6610"},
 297         {0x01, 0xE7, "LM3S6611"},
 298         {0x01, 0xE6, "LM3S6618"},
 299         {0x01, 0x83, "LM3S6633"},
 300         {0x01, 0x8B, "LM3S6637"},
 301         {0x01, 0xA3, "LM3S6730"},
 302         {0x01, 0x77, "LM3S6753"},
 303         {0x01, 0xD1, "LM3S6816"},
 304         {0x01, 0xE9, "LM3S6911"},
 305         {0x01, 0xD3, "LM3S6916"},
 306         {0x01, 0xE8, "LM3S6918"},
 307         {0x01, 0x89, "LM3S6938"},
 308         {0x01, 0x72, "LM3S6950"},
 309         {0x01, 0x78, "LM3S6952"},
 310         {0x01, 0x73, "LM3S6965"},
 311         {0x06, 0xAA, "LM3S6C11"},
 312         {0x06, 0xAC, "LM3S6C65"},
 313         {0x06, 0x9F, "LM3S6G11"},
 314         {0x06, 0xAB, "LM3S6G65"},
 315         {0x00, 0x38, "LM3S800"},
 316         {0x00, 0x31, "LM3S801"},
 317         {0x00, 0x39, "LM3S808"},
 318         {0x00, 0x32, "LM3S811"},
 319         {0x00, 0x33, "LM3S812"},
 320         {0x00, 0x34, "LM3S815"},
 321         {0x00, 0x36, "LM3S817"},
 322         {0x00, 0x37, "LM3S818"},
 323         {0x00, 0x35, "LM3S828"},
 324         {0x01, 0x64, "LM3S8530"},
 325         {0x01, 0x8E, "LM3S8538"},
 326         {0x01, 0x61, "LM3S8630"},
 327         {0x01, 0x63, "LM3S8730"},
 328         {0x01, 0x8D, "LM3S8733"},
 329         {0x01, 0x86, "LM3S8738"},
 330         {0x01, 0x65, "LM3S8930"},
 331         {0x01, 0x8C, "LM3S8933"},
 332         {0x01, 0x88, "LM3S8938"},
 333         {0x01, 0xA6, "LM3S8962"},
 334         {0x01, 0x62, "LM3S8970"},
 335         {0x01, 0xD7, "LM3S8971"},
 336         {0x06, 0xAE, "LM3S8C62"},
 337         {0x06, 0xAD, "LM3S8G62"},
 338         {0x04, 0xCF, "LM3S9781"},
 339         {0x04, 0x67, "LM3S9790"},
 340         {0x04, 0x6B, "LM3S9792"},
 341         {0x04, 0x2D, "LM3S9971"},
 342         {0x04, 0x20, "LM3S9997"},
 343         {0x04, 0xD0, "LM3S9B81"},
 344         {0x04, 0x66, "LM3S9B90"},
 345         {0x04, 0x6A, "LM3S9B92"},
 346         {0x04, 0x6E, "LM3S9B95"},
 347         {0x04, 0x6F, "LM3S9B96"},
 348         {0x04, 0x1D, "LM3S9BN2"},
 349         {0x04, 0x1E, "LM3S9BN5"},
 350         {0x04, 0x1F, "LM3S9BN6"},
 351         {0x06, 0x70, "LM3S9C97"},
 352         {0x06, 0x7A, "LM3S9CN5"},
 353         {0x06, 0xA9, "LM3S9D81"},
 354         {0x06, 0x7E, "LM3S9D90"},
 355         {0x06, 0x92, "LM3S9D92"},
 356         {0x06, 0xC8, "LM3S9D95"},
 357         {0x06, 0x9D, "LM3S9D96"},
 358         {0x06, 0x7B, "LM3S9DN5"},
 359         {0x06, 0x7C, "LM3S9DN6"},
 360         {0x06, 0x60, "LM3S9G97"},
 361         {0x06, 0x79, "LM3S9GN5"},
 362         {0x04, 0x1B, "LM3S9L71"},
 363         {0x04, 0x18, "LM3S9L97"},
 364         {0x06, 0xA8, "LM3S9U81"},
 365         {0x06, 0x7D, "LM3S9U90"},
 366         {0x06, 0x90, "LM3S9U92"},
 367         {0x06, 0xB7, "LM3S9U95"},
 368         {0x06, 0x9B, "LM3S9U96"},
 369         {0x05, 0x18, "LM4F110B2QR"},
 370         {0x05, 0x19, "LM4F110C4QR"},
 371         {0x05, 0x10, "LM4F110E5QR"},
 372         {0x05, 0x11, "LM4F110H5QR"},
 373         {0x05, 0x22, "LM4F111B2QR"},
 374         {0x05, 0x23, "LM4F111C4QR"},
 375         {0x05, 0x20, "LM4F111E5QR"},
 376         {0x05, 0x21, "LM4F111H5QR"},
 377         {0x05, 0x36, "LM4F112C4QC"},
 378         {0x05, 0x30, "LM4F112E5QC"},
 379         {0x05, 0x31, "LM4F112H5QC"},
 380         {0x05, 0x35, "LM4F112H5QD"},
 381         {0x05, 0x01, "LM4F120B2QR"},
 382         {0x05, 0x02, "LM4F120C4QR"},
 383         {0x05, 0x03, "LM4F120E5QR"},
 384         {0x05, 0x04, "LM4F120H5QR"},
 385         {0x05, 0x08, "LM4F121B2QR"},
 386         {0x05, 0x09, "LM4F121C4QR"},
 387         {0x05, 0x0A, "LM4F121E5QR"},
 388         {0x05, 0x0B, "LM4F121H5QR"},
 389         {0x05, 0xD0, "LM4F122C4QC"},
 390         {0x05, 0xD1, "LM4F122E5QC"},
 391         {0x05, 0xD2, "LM4F122H5QC"},
 392         {0x05, 0xD6, "LM4F122H5QD"},
 393         {0x05, 0x48, "LM4F130C4QR"},
 394         {0x05, 0x40, "LM4F130E5QR"},
 395         {0x05, 0x41, "LM4F130H5QR"},
 396         {0x05, 0x52, "LM4F131C4QR"},
 397         {0x05, 0x50, "LM4F131E5QR"},
 398         {0x05, 0x51, "LM4F131H5QR"},
 399         {0x05, 0x66, "LM4F132C4QC"},
 400         {0x05, 0x60, "LM4F132E5QC"},
 401         {0x05, 0x61, "LM4F132H5QC"},
 402         {0x05, 0x65, "LM4F132H5QD"},
 403         {0x05, 0xA0, "LM4F230E5QR"},
 404         {0x05, 0xA1, "LM4F230H5QR"},
 405         {0x05, 0xB0, "LM4F231E5QR"},
 406         {0x05, 0xB1, "LM4F231H5QR"},
 407         {0x05, 0xC0, "LM4F232E5QC"},
 408         {0x05, 0xE3, "LM4F232H5BB"},
 409         {0x05, 0xC1, "LM4F232H5QC"},
 410         {0x05, 0xC5, "LM4F232H5QD"},
 411         {0x05, 0xE5, "LM4FS1AH5BB"},
 412         {0x05, 0xE4, "LM4FS99H5BB"},
 413         {0x05, 0xE0, "LM4FSXAH5BB"},
 414         {0xFF, 0x00, "Unknown Part"}
 415 };
 416
 417 static char *StellarisClassname[7] = {
 418         "Sandstorm",
 419         "Fury",
 420         "Unknown",
 421         "DustDevil",
 422         "Tempest",
 423         "Blizzard",
 424         "Firestorm"
 425 };
 426
 427 /***************************************************************************
 428 *       openocd command interface                                              *
 429 ***************************************************************************/
 430
 431 /* flash_bank stellaris <base> <size> 0 0 <target#>
 432  */
 433 FLASH_BANK_COMMAND_HANDLER(stellaris_flash_bank_command)
 434 {
 435         struct stellaris_flash_bank *stellaris_info;
 436
 437         if (CMD_ARGC < 6)
 438                 return ERROR_COMMAND_SYNTAX_ERROR;
 439
 440         stellaris_info = calloc(sizeof(struct stellaris_flash_bank), 1);
 441         bank->base = 0x0;
 442         bank->driver_priv = stellaris_info;
 443
 444         stellaris_info->target_name = "Unknown target";
 445
 446         /* part wasn't probed for info yet */
 447         stellaris_info->did1 = 0;
 448
 449         /* TODO Specify the main crystal speed in kHz using an optional
 450          * argument; ditto, the speed of an external oscillator used
 451          * instead of a crystal.  Avoid programming flash using IOSC.
 452          */
 453         return ERROR_OK;
 454 }
 455
 456 static int get_stellaris_info(struct flash_bank *bank, char *buf, int buf_size)
 457 {
 458         int printed;
 459         struct stellaris_flash_bank *stellaris_info = bank->driver_priv;
 460
 461         if (stellaris_info->did1 == 0)
 462                 return ERROR_FLASH_BANK_NOT_PROBED;
 463
 464         /* Read main and master clock freqency register */
 465         stellaris_read_clock_info(bank);
 466
 467         printed = snprintf(buf,
 468                            buf_size,
 469                            "\nTI/LMI Stellaris information: Chip is "
 470                            "class %i (%s) %s rev %c%i\n",
 471                            stellaris_info->target_class,
 472                            StellarisClassname[stellaris_info->target_class],
 473                            stellaris_info->target_name,
 474                            (int)('A' + ((stellaris_info->did0 >> 8) & 0xFF)),
 475                            (int)((stellaris_info->did0) & 0xFF));
 476         buf += printed;
 477         buf_size -= printed;
 478
 479         printed = snprintf(buf,
 480                            buf_size,
 481                            "did1: 0x%8.8" PRIx32 ", arch: 0x%4.4" PRIx32
 482                            ", eproc: %s, ramsize: %ik, flashsize: %ik\n",
 483                            stellaris_info->did1,
 484                            stellaris_info->did1,
 485                            "ARMv7M",
 486                            (int)((1 + ((stellaris_info->dc0 >> 16) & 0xFFFF))/4),
 487                            (int)((1 + (stellaris_info->dc0 & 0xFFFF))*2));
 488         buf += printed;
 489         buf_size -= printed;
 490
 491         printed = snprintf(buf,
 492                            buf_size,
 493                            "master clock: %ikHz%s, "
 494                            "rcc is 0x%" PRIx32 ", rcc2 is 0x%" PRIx32 "\n",
 495                            (int)(stellaris_info->mck_freq / 1000),
 496                            stellaris_info->mck_desc,
 497                            stellaris_info->rcc,
 498                            stellaris_info->rcc2);
 499         buf += printed;
 500         buf_size -= printed;
 501
 502         if (stellaris_info->num_lockbits > 0) {
 503                 snprintf(buf,
 504                                 buf_size,
 505                                 "pagesize: %" PRIi32 ", pages: %d, "
 506                                 "lockbits: %i, pages per lockbit: %i\n",
 507                                 stellaris_info->pagesize,
 508                                 (unsigned) stellaris_info->num_pages,
 509                                 stellaris_info->num_lockbits,
 510                                 (unsigned) stellaris_info->pages_in_lockregion);
 511         }
 512         return ERROR_OK;
 513 }
 514
 515 /***************************************************************************
 516 *       chip identification and status                                         *
 517 ***************************************************************************/
 518
 519 /* Set the flash timimg register to match current clocking */
 520 static void stellaris_set_flash_timing(struct flash_bank *bank)
 521 {
 522         struct stellaris_flash_bank *stellaris_info = bank->driver_priv;
 523         struct target *target = bank->target;
 524         uint32_t usecrl = (stellaris_info->mck_freq/1000000ul-1);
 525
 526         /* only valid for Sandstorm and Fury class devices */
 527         if (stellaris_info->target_class > 1)
 528                 return;
 529
 530         LOG_DEBUG("usecrl = %i", (int)(usecrl));
 531         target_write_u32(target, SCB_BASE | USECRL, usecrl);
 532 }
 533
 534 static const unsigned rcc_xtal[32] = {
 535         [0x00] = 1000000,               /* no pll */
 536         [0x01] = 1843200,               /* no pll */
 537         [0x02] = 2000000,               /* no pll */
 538         [0x03] = 2457600,               /* no pll */
 539
 540         [0x04] = 3579545,
 541         [0x05] = 3686400,
 542         [0x06] = 4000000,               /* usb */
 543         [0x07] = 4096000,
 544
 545         [0x08] = 4915200,
 546         [0x09] = 5000000,               /* usb */
 547         [0x0a] = 5120000,
 548         [0x0b] = 6000000,               /* (reset) usb */
 549
 550         [0x0c] = 6144000,
 551         [0x0d] = 7372800,
 552         [0x0e] = 8000000,               /* usb */
 553         [0x0f] = 8192000,
 554
 555         /* parts before DustDevil use just 4 bits for xtal spec */
 556
 557         [0x10] = 10000000,              /* usb */
 558         [0x11] = 12000000,              /* usb */
 559         [0x12] = 12288000,
 560         [0x13] = 13560000,
 561
 562         [0x14] = 14318180,
 563         [0x15] = 16000000,              /* usb */
 564         [0x16] = 16384000,
 565 };
 566
 567 /** Read clock configuration and set stellaris_info->usec_clocks. */
 568 static void stellaris_read_clock_info(struct flash_bank *bank)
 569 {
 570         struct stellaris_flash_bank *stellaris_info = bank->driver_priv;
 571         struct target *target = bank->target;
 572         uint32_t rcc, rcc2, pllcfg, sysdiv, usesysdiv, bypass, oscsrc;
 573         unsigned xtal;
 574         unsigned long mainfreq;
 575
 576         target_read_u32(target, SCB_BASE | RCC, &rcc);
 577         LOG_DEBUG("Stellaris RCC %" PRIx32 "", rcc);
 578
 579         target_read_u32(target, SCB_BASE | RCC2, &rcc2);
 580         LOG_DEBUG("Stellaris RCC2 %" PRIx32 "", rcc);
 581
 582         target_read_u32(target, SCB_BASE | PLLCFG, &pllcfg);
 583         LOG_DEBUG("Stellaris PLLCFG %" PRIx32 "", pllcfg);
 584
 585         stellaris_info->rcc = rcc;
 586         stellaris_info->rcc = rcc2;
 587
 588         sysdiv = (rcc >> 23) & 0xF;
 589         usesysdiv = (rcc >> 22) & 0x1;
 590         bypass = (rcc >> 11) & 0x1;
 591         oscsrc = (rcc >> 4) & 0x3;
 592         xtal = (rcc >> 6) & stellaris_info->xtal_mask;
 593
 594         /* NOTE: post-Sandstorm parts have RCC2 which may override
 595          * parts of RCC ... with more sysdiv options, option for
 596          * 32768 Hz mainfreq, PLL controls.  On Sandstorm it reads
 597          * as zero, so the "use RCC2" flag is always clear.
 598          */
 599         if (rcc2 & (1 << 31)) {
 600                 sysdiv = (rcc2 >> 23) & 0x3F;
 601                 bypass = (rcc2 >> 11) & 0x1;
 602                 oscsrc = (rcc2 >> 4) & 0x7;
 603
 604                 /* FIXME Tempest parts have an additional lsb for
 605                  * fractional sysdiv (200 MHz / 2.5 == 80 MHz)
 606                  */
 607         }
 608
 609         stellaris_info->mck_desc = "";
 610
 611         switch (oscsrc) {
 612                 case 0:                         /* MOSC */
 613                         mainfreq = rcc_xtal[xtal];
 614                         break;
 615                 case 1:                         /* IOSC */
 616                         mainfreq = stellaris_info->iosc_freq;
 617                         stellaris_info->mck_desc = stellaris_info->iosc_desc;
 618                         break;
 619                 case 2:                         /* IOSC/4 */
 620                         mainfreq = stellaris_info->iosc_freq / 4;
 621                         stellaris_info->mck_desc = stellaris_info->iosc_desc;
 622                         break;
 623                 case 3:                         /* lowspeed */
 624                         /* Sandstorm doesn't have this 30K +/- 30% osc */
 625                         mainfreq = 30000;
 626                         stellaris_info->mck_desc = " (±30%)";
 627                         break;
 628                 case 8:                         /* hibernation osc */
 629                         /* not all parts support hibernation */
 630                         mainfreq = 32768;
 631                         break;
 632
 633                 default: /* NOTREACHED */
 634                         mainfreq = 0;
 635                         break;
 636         }
 637
 638         /* PLL is used if it's not bypassed; its output is 200 MHz
 639          * even when it runs at 400 MHz (adds divide-by-two stage).
 640          */
 641         if (!bypass)
 642                 mainfreq = 200000000;
 643
 644         if (usesysdiv)
 645                 stellaris_info->mck_freq = mainfreq/(1 + sysdiv);
 646         else
 647                 stellaris_info->mck_freq = mainfreq;
 648 }
 649
 650 /* Read device id register, main clock frequency register and fill in driver info structure */
 651 static int stellaris_read_part_info(struct flash_bank *bank)
 652 {
 653         struct stellaris_flash_bank *stellaris_info = bank->driver_priv;
 654         struct target *target = bank->target;
 655         uint32_t did0, did1, ver, fam;
 656         int i;
 657
 658         /* Read and parse chip identification register */
 659         target_read_u32(target, SCB_BASE | DID0, &did0);
 660         target_read_u32(target, SCB_BASE | DID1, &did1);
 661         target_read_u32(target, SCB_BASE | DC0, &stellaris_info->dc0);
 662         target_read_u32(target, SCB_BASE | DC1, &stellaris_info->dc1);
 663         LOG_DEBUG("did0 0x%" PRIx32 ", did1 0x%" PRIx32 ", dc0 0x%" PRIx32 ", dc1 0x%" PRIx32 "",
 664                   did0, did1, stellaris_info->dc0, stellaris_info->dc1);
 665
 666         ver = did0 >> 28;
 667         if ((ver != 0) && (ver != 1)) {
 668                 LOG_WARNING("Unknown did0 version, cannot identify target");
 669                 return ERROR_FLASH_OPERATION_FAILED;
 670         }
 671
 672         if (did1 == 0) {
 673                 LOG_WARNING("Cannot identify target as a Stellaris");
 674                 return ERROR_FLASH_OPERATION_FAILED;
 675         }
 676
 677         ver = did1 >> 28;
 678         fam = (did1 >> 24) & 0xF;
 679         if (((ver != 0) && (ver != 1)) || (fam != 0)) {
 680                 LOG_WARNING("Unknown did1 version/family.");
 681                 return ERROR_FLASH_OPERATION_FAILED;
 682         }
 683
 684         /* For Sandstorm, Fury, DustDevil:  current data sheets say IOSC
 685          * is 12 MHz, but some older parts have 15 MHz.  A few data sheets
 686          * even give _both_ numbers!  We'll use current numbers; IOSC is
 687          * always approximate.
 688          *
 689          * For Tempest:  IOSC is calibrated, 16 MHz
 690          * For Blizzard:  IOSC is calibrated, 16 MHz
 691          * For Firestorm:  IOSC is calibrated, 16 MHz
 692          */
 693         stellaris_info->iosc_freq = 12000000;
 694         stellaris_info->iosc_desc = " (±30%)";
 695         stellaris_info->xtal_mask = 0x0f;
 696
 697         /* get device class */
 698         if (DID0_VER(did0) > 0) {
 699                 stellaris_info->target_class = (did0 >> 16) & 0xFF;
 700         } else {
 701                 /* Sandstorm class */
 702                 stellaris_info->target_class = 0;
 703         }
 704
 705         switch (stellaris_info->target_class) {
 706                 case 0:                         /* Sandstorm */
 707                         /*
 708                          * Current (2009-August) parts seem to be rev C2 and use 12 MHz.
 709                          * Parts before rev C0 used 15 MHz; some C0 parts use 15 MHz
 710                          * (LM3S618), but some other C0 parts are 12 MHz (LM3S811).
 711                          */
 712                         if (((did0 >> 8) & 0xff) < 2) {
 713                                 stellaris_info->iosc_freq = 15000000;
 714                                 stellaris_info->iosc_desc = " (±50%)";
 715                         }
 716                         break;
 717
 718                 case 1:                 /* Fury */
 719                         break;
 720
 721                 case 4:                 /* Tempest */
 722                 case 5:                 /* Blizzard */
 723                 case 6:                 /* Firestorm */
 724                         stellaris_info->iosc_freq = 16000000;   /* +/- 1% */
 725                         stellaris_info->iosc_desc = " (±1%)";
 726                         /* FALL THROUGH */
 727
 728                 case 3:                 /* DustDevil */
 729                         stellaris_info->xtal_mask = 0x1f;
 730                         break;
 731
 732                 default:
 733                         LOG_WARNING("Unknown did0 class");
 734         }
 735
 736         for (i = 0; StellarisParts[i].partno; i++) {
 737                 if ((StellarisParts[i].partno == ((did1 >> 16) & 0xFF)) &&
 738                                 (StellarisParts[i].class == stellaris_info->target_class))
 739                         break;
 740         }
 741
 742         stellaris_info->target_name = StellarisParts[i].partname;
 743
 744         stellaris_info->did0 = did0;
 745         stellaris_info->did1 = did1;
 746
 747         stellaris_info->num_lockbits = 1 + (stellaris_info->dc0 & 0xFFFF);
 748         stellaris_info->num_pages = 2 * (1 + (stellaris_info->dc0 & 0xFFFF));
 749         stellaris_info->pagesize = 1024;
 750         stellaris_info->pages_in_lockregion = 2;
 751
 752         /* REVISIT for at least Tempest parts, read NVMSTAT.FWB too.
 753          * That exposes a 32-word Flash Write Buffer ... enabling
 754          * writes of more than one word at a time.
 755          */
 756
 757         return ERROR_OK;
 758 }
 759
 760 /***************************************************************************
 761 *       flash operations                                                       *
 762 ***************************************************************************/
 763
 764 static int stellaris_protect_check(struct flash_bank *bank)
 765 {
 766         struct stellaris_flash_bank *stellaris = bank->driver_priv;
 767         int status = ERROR_OK;
 768         unsigned i;
 769         unsigned page;
 770
 771         if (stellaris->did1 == 0)
 772                 return ERROR_FLASH_BANK_NOT_PROBED;
 773
 774         for (i = 0; i < (unsigned) bank->num_sectors; i++)
 775                 bank->sectors[i].is_protected = -1;
 776
 777         /* Read each Flash Memory Protection Program Enable (FMPPE) register
 778          * to report any pages that we can't write.  Ignore the Read Enable
 779          * register (FMPRE).
 780          */
 781         for (i = 0, page = 0;
 782                         i < DIV_ROUND_UP(stellaris->num_lockbits, 32u);
 783                         i++) {
 784                 uint32_t lockbits;
 785
 786                 status = target_read_u32(bank->target,
 787                                 SCB_BASE + (i ? (FMPPE0 + 4 * i) : FMPPE),
 788                                 &lockbits);
 789                 LOG_DEBUG("FMPPE%d = %#8.8x (status %d)", i,
 790                                 (unsigned) lockbits, status);
 791                 if (status != ERROR_OK)
 792                         goto done;
 793
 794                 for (unsigned j = 0; j < 32; j++) {
 795                         unsigned k;
 796
 797                         for (k = 0; k < stellaris->pages_in_lockregion; k++) {
 798                                 if (page >= (unsigned) bank->num_sectors)
 799                                         goto done;
 800                                 bank->sectors[page++].is_protected =
 801                                                 !(lockbits & (1 << j));
 802                         }
 803                 }
 804         }
 805
 806 done:
 807         return status;
 808 }
 809
 810 static int stellaris_erase(struct flash_bank *bank, int first, int last)
 811 {
 812         int banknr;
 813         uint32_t flash_fmc, flash_cris;
 814         struct stellaris_flash_bank *stellaris_info = bank->driver_priv;
 815         struct target *target = bank->target;
 816
 817         if (bank->target->state != TARGET_HALTED) {
 818                 LOG_ERROR("Target not halted");
 819                 return ERROR_TARGET_NOT_HALTED;
 820         }
 821
 822         if (stellaris_info->did1 == 0)
 823                 return ERROR_FLASH_BANK_NOT_PROBED;
 824
 825         if ((first < 0) || (last < first) || (last >= (int)stellaris_info->num_pages))
 826                 return ERROR_FLASH_SECTOR_INVALID;
 827
 828         if ((first == 0) && (last == ((int)stellaris_info->num_pages-1)))
 829                 return stellaris_mass_erase(bank);
 830
 831         /* Refresh flash controller timing */
 832         stellaris_read_clock_info(bank);
 833         stellaris_set_flash_timing(bank);
 834
 835         /* Clear and disable flash programming interrupts */
 836         target_write_u32(target, FLASH_CIM, 0);
 837         target_write_u32(target, FLASH_MISC, PMISC | AMISC);
 838
 839         /* REVISIT this clobbers state set by any halted firmware ...
 840          * it might want to process those IRQs.
 841          */
 842
 843         for (banknr = first; banknr <= last; banknr++) {
 844                 /* Address is first word in page */
 845                 target_write_u32(target, FLASH_FMA, banknr * stellaris_info->pagesize);
 846                 /* Write erase command */
 847                 target_write_u32(target, FLASH_FMC, FMC_WRKEY | FMC_ERASE);
 848                 /* Wait until erase complete */
 849                 do {
 850                         target_read_u32(target, FLASH_FMC, &flash_fmc);
 851                 } while (flash_fmc & FMC_ERASE);
 852
 853                 /* Check acess violations */
 854                 target_read_u32(target, FLASH_CRIS, &flash_cris);
 855                 if (flash_cris & (AMASK)) {
 856                         LOG_WARNING("Error erasing flash page %i,  flash_cris 0x%" PRIx32 "",
 857                                         banknr, flash_cris);
 858                         target_write_u32(target, FLASH_CRIS, 0);
 859                         return ERROR_FLASH_OPERATION_FAILED;
 860                 }
 861
 862                 bank->sectors[banknr].is_erased = 1;
 863         }
 864
 865         return ERROR_OK;
 866 }
 867
 868 static int stellaris_protect(struct flash_bank *bank, int set, int first, int last)
 869 {
 870         uint32_t fmppe, flash_fmc, flash_cris;
 871         int lockregion;
 872
 873         struct stellaris_flash_bank *stellaris_info = bank->driver_priv;
 874         struct target *target = bank->target;
 875
 876         if (bank->target->state != TARGET_HALTED) {
 877                 LOG_ERROR("Target not halted");
 878                 return ERROR_TARGET_NOT_HALTED;
 879         }
 880
 881         if (!set) {
 882                 LOG_ERROR("Hardware doesn't support page-level unprotect. "
 883                         "Try the 'recover' command.");
 884                 return ERROR_COMMAND_SYNTAX_ERROR;
 885         }
 886
 887         if (stellaris_info->did1 == 0)
 888                 return ERROR_FLASH_BANK_NOT_PROBED;
 889
 890         /* lockregions are 2 pages ... must protect [even..odd] */
 891         if ((first < 0) || (first & 1)
 892                         || (last < first) || !(last & 1)
 893                         || (last >= 2 * stellaris_info->num_lockbits)) {
 894                 LOG_ERROR("Can't protect unaligned or out-of-range pages.");
 895                 return ERROR_FLASH_SECTOR_INVALID;
 896         }
 897
 898         /* Refresh flash controller timing */
 899         stellaris_read_clock_info(bank);
 900         stellaris_set_flash_timing(bank);
 901
 902         /* convert from pages to lockregions */
 903         first /= 2;
 904         last /= 2;
 905
 906         /* FIXME this assumes single FMPPE, for a max of 64K of flash!!
 907          * Current parts can be much bigger.
 908          */
 909         if (last >= 32) {
 910                 LOG_ERROR("No support yet for protection > 64K");
 911                 return ERROR_FLASH_OPERATION_FAILED;
 912         }
 913
 914         target_read_u32(target, SCB_BASE | FMPPE, &fmppe);
 915
 916         for (lockregion = first; lockregion <= last; lockregion++)
 917                 fmppe &= ~(1 << lockregion);
 918
 919         /* Clear and disable flash programming interrupts */
 920         target_write_u32(target, FLASH_CIM, 0);
 921         target_write_u32(target, FLASH_MISC, PMISC | AMISC);
 922
 923         /* REVISIT this clobbers state set by any halted firmware ...
 924          * it might want to process those IRQs.
 925          */
 926
 927         LOG_DEBUG("fmppe 0x%" PRIx32 "", fmppe);
 928         target_write_u32(target, SCB_BASE | FMPPE, fmppe);
 929
 930         /* Commit FMPPE */
 931         target_write_u32(target, FLASH_FMA, 1);
 932
 933         /* Write commit command */
 934         /* REVISIT safety check, since this cannot be undone
 935          * except by the "Recover a locked device" procedure.
 936          * REVISIT DustDevil-A0 parts have an erratum making FMPPE commits
 937          * inadvisable ... it makes future mass erase operations fail.
 938          */
 939         LOG_WARNING("Flash protection cannot be removed once committed, commit is NOT executed !");
 940         /* target_write_u32(target, FLASH_FMC, FMC_WRKEY | FMC_COMT); */
 941
 942         /* Wait until erase complete */
 943         do {
 944                 target_read_u32(target, FLASH_FMC, &flash_fmc);
 945         } while (flash_fmc & FMC_COMT);
 946
 947         /* Check acess violations */
 948         target_read_u32(target, FLASH_CRIS, &flash_cris);
 949         if (flash_cris & (AMASK)) {
 950                 LOG_WARNING("Error setting flash page protection,  flash_cris 0x%" PRIx32 "", flash_cris);
 951                 target_write_u32(target, FLASH_CRIS, 0);
 952                 return ERROR_FLASH_OPERATION_FAILED;
 953         }
 954
 955         return ERROR_OK;
 956 }
 957
 958 /* see contib/loaders/flash/stellaris.s for src */
 959
 960 static const uint8_t stellaris_write_code[] = {
 961 /*
 962         Call with :
 963         r0 = buffer address
 964         r1 = destination address
 965         r2 = bytecount (in) - endaddr (work)
 966
 967         Used registers:
 968         r3 = pFLASH_CTRL_BASE
 969         r4 = FLASHWRITECMD
 970         r5 = #1
 971         r6 = bytes written
 972         r7 = temp reg
 973 */
 974         0x07, 0x4B,                     /* ldr r3,pFLASH_CTRL_BASE */
 975         0x08, 0x4C,                     /* ldr r4,FLASHWRITECMD */
 976         0x01, 0x25,                     /* movs r5, 1 */
 977         0x00, 0x26,                     /* movs r6, #0 */
 978 /* mainloop: */
 979         0x19, 0x60,                     /* str  r1, [r3, #0] */
 980         0x87, 0x59,                     /* ldr  r7, [r0, r6] */
 981         0x5F, 0x60,                     /* str  r7, [r3, #4] */
 982         0x9C, 0x60,                     /* str  r4, [r3, #8] */
 983 /* waitloop: */
 984         0x9F, 0x68,                     /* ldr  r7, [r3, #8] */
 985         0x2F, 0x42,                     /* tst  r7, r5 */
 986         0xFC, 0xD1,                     /* bne  waitloop */
 987         0x04, 0x31,                     /* adds r1, r1, #4 */
 988         0x04, 0x36,                     /* adds r6, r6, #4 */
 989         0x96, 0x42,                     /* cmp  r6, r2 */
 990         0xF4, 0xD1,                     /* bne  mainloop */
 991         0x00, 0xBE,                     /* bkpt #0 */
 992 /* pFLASH_CTRL_BASE: */
 993         0x00, 0xD0, 0x0F, 0x40, /* .word        0x400FD000 */
 994 /* FLASHWRITECMD: */
 995         0x01, 0x00, 0x42, 0xA4  /* .word        0xA4420001 */
 996 };
 997
 998 static int stellaris_write_block(struct flash_bank *bank,
 999                 uint8_t *buffer, uint32_t offset, uint32_t wcount)
1000 {
1001         struct target *target = bank->target;
1002         uint32_t buffer_size = 16384;
1003         struct working_area *source;
1004         struct working_area *write_algorithm;
1005         uint32_t address = bank->base + offset;
1006         struct reg_param reg_params[3];
1007         struct armv7m_algorithm armv7m_info;
1008         int retval = ERROR_OK;
1009
1010         /* power of two, and multiple of word size */
1011         static const unsigned buf_min = 128;
1012
1013         /* for small buffers it's faster not to download an algorithm */
1014         if (wcount * 4 < buf_min)
1015                 return ERROR_TARGET_RESOURCE_NOT_AVAILABLE;
1016
1017         LOG_DEBUG("(bank=%p buffer=%p offset=%08" PRIx32 " wcount=%08" PRIx32 "",
1018                         bank, buffer, offset, wcount);
1019
1020         /* flash write code */
1021         if (target_alloc_working_area(target, sizeof(stellaris_write_code),
1022                         &write_algorithm) != ERROR_OK) {
1023                 LOG_DEBUG("no working area for block memory writes");
1024                 return ERROR_TARGET_RESOURCE_NOT_AVAILABLE;
1025         };
1026
1027         /* plus a buffer big enough for this data */
1028         if (wcount * 4 < buffer_size)
1029                 buffer_size = wcount * 4;
1030
1031         /* memory buffer */
1032         while (target_alloc_working_area_try(target, buffer_size, &source) != ERROR_OK) {
1033                 buffer_size /= 2;
1034                 if (buffer_size <= buf_min) {
1035                         target_free_working_area(target, write_algorithm);
1036                         return ERROR_TARGET_RESOURCE_NOT_AVAILABLE;
1037                 }
1038                 LOG_DEBUG("retry target_alloc_working_area(%s, size=%u)",
1039                                 target_name(target), (unsigned) buffer_size);
1040         };
1041
1042         retval = target_write_buffer(target, write_algorithm->address,
1043                         sizeof(stellaris_write_code),
1044                         (uint8_t *) stellaris_write_code);
1045
1046         armv7m_info.common_magic = ARMV7M_COMMON_MAGIC;
1047         armv7m_info.core_mode = ARMV7M_MODE_ANY;
1048
1049         init_reg_param(&reg_params[0], "r0", 32, PARAM_OUT);
1050         init_reg_param(&reg_params[1], "r1", 32, PARAM_OUT);
1051         init_reg_param(&reg_params[2], "r2", 32, PARAM_OUT);
1052
1053         while (wcount > 0) {
1054                 uint32_t thisrun_count = (wcount > (buffer_size / 4)) ? (buffer_size / 4) : wcount;
1055
1056                 target_write_buffer(target, source->address, thisrun_count * 4, buffer);
1057
1058                 buf_set_u32(reg_params[0].value, 0, 32, source->address);
1059                 buf_set_u32(reg_params[1].value, 0, 32, address);
1060                 buf_set_u32(reg_params[2].value, 0, 32, 4*thisrun_count);
1061                 LOG_DEBUG("Algorithm flash write %u words to 0x%" PRIx32
1062                                 ", %u remaining",
1063                                 (unsigned) thisrun_count, address,
1064                                 (unsigned) (wcount - thisrun_count));
1065                 retval = target_run_algorithm(target, 0, NULL, 3, reg_params,
1066                                 write_algorithm->address,
1067                                 0,
1068                                 10000, &armv7m_info);
1069                 if (retval != ERROR_OK) {
1070                         LOG_ERROR("error %d executing stellaris "
1071                                         "flash write algorithm",
1072                                         retval);
1073                         retval = ERROR_FLASH_OPERATION_FAILED;
1074                         break;
1075                 }
1076
1077                 buffer += thisrun_count * 4;
1078                 address += thisrun_count * 4;
1079                 wcount -= thisrun_count;
1080         }
1081
1082         /* REVISIT we could speed up writing multi-section images by
1083          * not freeing the initialized write_algorithm this way.
1084          */
1085
1086         target_free_working_area(target, write_algorithm);
1087         target_free_working_area(target, source);
1088
1089         destroy_reg_param(&reg_params[0]);
1090         destroy_reg_param(&reg_params[1]);
1091         destroy_reg_param(&reg_params[2]);
1092
1093         return retval;
1094 }
1095
1096 static int stellaris_write(struct flash_bank *bank, uint8_t *buffer,
1097                 uint32_t offset, uint32_t count)
1098 {
1099         struct stellaris_flash_bank *stellaris_info = bank->driver_priv;
1100         struct target *target = bank->target;
1101         uint32_t address = offset;
1102         uint32_t flash_cris, flash_fmc;
1103         uint32_t words_remaining = (count / 4);
1104         uint32_t bytes_remaining = (count & 0x00000003);
1105         uint32_t bytes_written = 0;
1106         int retval;
1107
1108         if (bank->target->state != TARGET_HALTED) {
1109                 LOG_ERROR("Target not halted");
1110                 return ERROR_TARGET_NOT_HALTED;
1111         }
1112
1113         LOG_DEBUG("(bank=%p buffer=%p offset=%08" PRIx32 " count=%08" PRIx32 "",
1114                         bank, buffer, offset, count);
1115
1116         if (stellaris_info->did1 == 0)
1117                 return ERROR_FLASH_BANK_NOT_PROBED;
1118
1119         if (offset & 0x3) {
1120                 LOG_WARNING("offset size must be word aligned");
1121                 return ERROR_FLASH_DST_BREAKS_ALIGNMENT;
1122         }
1123
1124         if (offset + count > bank->size)
1125                 return ERROR_FLASH_DST_OUT_OF_BANK;
1126
1127         /* Refresh flash controller timing */
1128         stellaris_read_clock_info(bank);
1129         stellaris_set_flash_timing(bank);
1130
1131         /* Clear and disable flash programming interrupts */
1132         target_write_u32(target, FLASH_CIM, 0);
1133         target_write_u32(target, FLASH_MISC, PMISC | AMISC);
1134
1135         /* REVISIT this clobbers state set by any halted firmware ...
1136          * it might want to process those IRQs.
1137          */
1138
1139         /* multiple words to be programmed? */
1140         if (words_remaining > 0) {
1141                 /* try using a block write */
1142                 retval = stellaris_write_block(bank, buffer, offset,
1143                                 words_remaining);
1144                 if (retval != ERROR_OK) {
1145                         if (retval == ERROR_TARGET_RESOURCE_NOT_AVAILABLE) {
1146                                 LOG_DEBUG("writing flash word-at-a-time");
1147                         } else if (retval == ERROR_FLASH_OPERATION_FAILED) {
1148                                 /* if an error occured, we examine the reason, and quit */
1149                                 target_read_u32(target, FLASH_CRIS, &flash_cris);
1150
1151                                 LOG_ERROR("flash writing failed with CRIS: 0x%" PRIx32 "", flash_cris);
1152                                 return ERROR_FLASH_OPERATION_FAILED;
1153                         }
1154                 } else {
1155                         buffer += words_remaining * 4;
1156                         address += words_remaining * 4;
1157                         words_remaining = 0;
1158                 }
1159         }
1160
1161         while (words_remaining > 0) {
1162                 if (!(address & 0xff))
1163                         LOG_DEBUG("0x%" PRIx32 "", address);
1164
1165                 /* Program one word */
1166                 target_write_u32(target, FLASH_FMA, address);
1167                 target_write_buffer(target, FLASH_FMD, 4, buffer);
1168                 target_write_u32(target, FLASH_FMC, FMC_WRKEY | FMC_WRITE);
1169                 /* LOG_DEBUG("0x%x 0x%x 0x%x",address,buf_get_u32(buffer, 0, 32),FMC_WRKEY | FMC_WRITE); */
1170                 /* Wait until write complete */
1171                 do {
1172                         target_read_u32(target, FLASH_FMC, &flash_fmc);
1173                 } while (flash_fmc & FMC_WRITE);
1174
1175                 buffer += 4;
1176                 address += 4;
1177                 words_remaining--;
1178         }
1179
1180         if (bytes_remaining) {
1181                 uint8_t last_word[4] = {0xff, 0xff, 0xff, 0xff};
1182
1183                 /* copy the last remaining bytes into the write buffer */
1184                 memcpy(last_word, buffer+bytes_written, bytes_remaining);
1185
1186                 if (!(address & 0xff))
1187                         LOG_DEBUG("0x%" PRIx32 "", address);
1188
1189                 /* Program one word */
1190                 target_write_u32(target, FLASH_FMA, address);
1191                 target_write_buffer(target, FLASH_FMD, 4, last_word);
1192                 target_write_u32(target, FLASH_FMC, FMC_WRKEY | FMC_WRITE);
1193                 /* LOG_DEBUG("0x%x 0x%x 0x%x",address,buf_get_u32(buffer, 0, 32),FMC_WRKEY | FMC_WRITE); */
1194                 /* Wait until write complete */
1195                 do {
1196                         target_read_u32(target, FLASH_FMC, &flash_fmc);
1197                 } while (flash_fmc & FMC_WRITE);
1198         }
1199
1200         /* Check access violations */
1201         target_read_u32(target, FLASH_CRIS, &flash_cris);
1202         if (flash_cris & (AMASK)) {
1203                 LOG_DEBUG("flash_cris 0x%" PRIx32 "", flash_cris);
1204                 return ERROR_FLASH_OPERATION_FAILED;
1205         }
1206         return ERROR_OK;
1207 }
1208
1209 static int stellaris_probe(struct flash_bank *bank)
1210 {
1211         struct stellaris_flash_bank *stellaris_info = bank->driver_priv;
1212         int retval;
1213
1214         /* If this is a stellaris chip, it has flash; probe() is just
1215          * to figure out how much is present.  Only do it once.
1216          */
1217         if (stellaris_info->did1 != 0)
1218                 return ERROR_OK;
1219
1220         /* stellaris_read_part_info() already handled error checking and
1221          * reporting.  Note that it doesn't write, so we don't care about
1222          * whether the target is halted or not.
1223          */
1224         retval = stellaris_read_part_info(bank);
1225         if (retval != ERROR_OK)
1226                 return retval;
1227
1228         if (bank->sectors) {
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                 bank->sectors[i].offset = i * stellaris_info->pagesize;
1239                 bank->sectors[i].size = stellaris_info->pagesize;
1240                 bank->sectors[i].is_erased = -1;
1241                 bank->sectors[i].is_protected = -1;
1242         }
1243
1244         return retval;
1245 }
1246
1247 static int stellaris_mass_erase(struct flash_bank *bank)
1248 {
1249         struct target *target = NULL;
1250         struct stellaris_flash_bank *stellaris_info = NULL;
1251         uint32_t flash_fmc;
1252
1253         stellaris_info = bank->driver_priv;
1254         target = bank->target;
1255
1256         if (target->state != TARGET_HALTED) {
1257                 LOG_ERROR("Target not halted");
1258                 return ERROR_TARGET_NOT_HALTED;
1259         }
1260
1261         if (stellaris_info->did1 == 0)
1262                 return ERROR_FLASH_BANK_NOT_PROBED;
1263
1264         /* Refresh flash controller timing */
1265         stellaris_read_clock_info(bank);
1266         stellaris_set_flash_timing(bank);
1267
1268         /* Clear and disable flash programming interrupts */
1269         target_write_u32(target, FLASH_CIM, 0);
1270         target_write_u32(target, FLASH_MISC, PMISC | AMISC);
1271
1272         /* REVISIT this clobbers state set by any halted firmware ...
1273          * it might want to process those IRQs.
1274          */
1275
1276         target_write_u32(target, FLASH_FMA, 0);
1277         target_write_u32(target, FLASH_FMC, FMC_WRKEY | FMC_MERASE);
1278         /* Wait until erase complete */
1279         do {
1280                 target_read_u32(target, FLASH_FMC, &flash_fmc);
1281         } while (flash_fmc & FMC_MERASE);
1282
1283         /* if device has > 128k, then second erase cycle is needed
1284          * this is only valid for older devices, but will not hurt */
1285         if (stellaris_info->num_pages * stellaris_info->pagesize > 0x20000) {
1286                 target_write_u32(target, FLASH_FMA, 0x20000);
1287                 target_write_u32(target, FLASH_FMC, FMC_WRKEY | FMC_MERASE);
1288                 /* Wait until erase complete */
1289                 do {
1290                         target_read_u32(target, FLASH_FMC, &flash_fmc);
1291                 } while (flash_fmc & FMC_MERASE);
1292         }
1293
1294         return ERROR_OK;
1295 }
1296
1297 COMMAND_HANDLER(stellaris_handle_mass_erase_command)
1298 {
1299         int i;
1300
1301         if (CMD_ARGC < 1)
1302                 return ERROR_COMMAND_SYNTAX_ERROR;
1303
1304         struct flash_bank *bank;
1305         int retval = CALL_COMMAND_HANDLER(flash_command_get_bank, 0, &bank);
1306         if (ERROR_OK != retval)
1307                 return retval;
1308
1309         if (stellaris_mass_erase(bank) == ERROR_OK) {
1310                 /* set all sectors as erased */
1311                 for (i = 0; i < bank->num_sectors; i++)
1312                         bank->sectors[i].is_erased = 1;
1313
1314                 command_print(CMD_CTX, "stellaris mass erase complete");
1315         } else
1316                 command_print(CMD_CTX, "stellaris mass erase failed");
1317
1318         return ERROR_OK;
1319 }
1320
1321 /**
1322  * Perform the Stellaris "Recovering a 'Locked' Device procedure.
1323  * This performs a mass erase and then restores all nonvolatile registers
1324  * (including USER_* registers and flash lock bits) to their defaults.
1325  * Accordingly, flash can be reprogrammed, and JTAG can be used.
1326  *
1327  * NOTE that DustDevil parts (at least rev A0 silicon) have errata which
1328  * can affect this operation if flash protection has been enabled.
1329  */
1330 COMMAND_HANDLER(stellaris_handle_recover_command)
1331 {
1332         struct flash_bank *bank;
1333         int retval;
1334
1335         retval = CALL_COMMAND_HANDLER(flash_command_get_bank, 0, &bank);
1336         if (retval != ERROR_OK)
1337                 return retval;
1338
1339         /* REVISIT ... it may be worth sanity checking that the AP is
1340          * inactive before we start.  ARM documents that switching a DP's
1341          * mode while it's active can cause fault modes that need a power
1342          * cycle to recover.
1343          */
1344
1345         /* assert SRST */
1346         if (!(jtag_get_reset_config() & RESET_HAS_SRST)) {
1347                 LOG_ERROR("Can't recover Stellaris flash without SRST");
1348                 return ERROR_FAIL;
1349         }
1350         jtag_add_reset(0, 1);
1351
1352         for (int i = 0; i < 5; i++) {
1353                 retval = dap_to_swd(bank->target);
1354                 if (retval != ERROR_OK)
1355                         goto done;
1356
1357                 retval = dap_to_jtag(bank->target);
1358                 if (retval != ERROR_OK)
1359                         goto done;
1360         }
1361
1362         /* de-assert SRST */
1363         jtag_add_reset(0, 0);
1364         retval = jtag_execute_queue();
1365
1366         /* wait 400+ msec ... OK, "1+ second" is simpler */
1367         usleep(1000);
1368
1369         /* USER INTERVENTION required for the power cycle
1370          * Restarting OpenOCD is likely needed because of mode switching.
1371          */
1372         LOG_INFO("USER ACTION:  "
1373                 "power cycle Stellaris chip, then restart OpenOCD.");
1374
1375 done:
1376         return retval;
1377 }
1378
1379 static const struct command_registration stellaris_exec_command_handlers[] = {
1380         {
1381                 .name = "mass_erase",
1382                 .usage = "<bank>",
1383                 .handler = stellaris_handle_mass_erase_command,
1384                 .mode = COMMAND_EXEC,
1385                 .help = "erase entire device",
1386         },
1387         {
1388                 .name = "recover",
1389                 .handler = stellaris_handle_recover_command,
1390                 .mode = COMMAND_EXEC,
1391                 .usage = "bank_id",
1392                 .help = "recover (and erase) locked device",
1393         },
1394         COMMAND_REGISTRATION_DONE
1395 };
1396 static const struct command_registration stellaris_command_handlers[] = {
1397         {
1398                 .name = "stellaris",
1399                 .mode = COMMAND_EXEC,
1400                 .help = "Stellaris flash command group",
1401                 .usage = "",
1402                 .chain = stellaris_exec_command_handlers,
1403         },
1404         COMMAND_REGISTRATION_DONE
1405 };
1406
1407 struct flash_driver stellaris_flash = {
1408         .name = "stellaris",
1409         .commands = stellaris_command_handlers,
1410         .flash_bank_command = stellaris_flash_bank_command,
1411         .erase = stellaris_erase,
1412         .protect = stellaris_protect,
1413         .write = stellaris_write,
1414         .read = default_flash_read,
1415         .probe = stellaris_probe,
1416         .auto_probe = stellaris_probe,
1417         .erase_check = default_flash_mem_blank_check,
1418         .protect_check = stellaris_protect_check,
1419         .info = get_stellaris_info,
1420 };