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, see <http://www.gnu.org/licenses/>. *
  20  ***************************************************************************/
  21
  22 /***************************************************************************
  23 * STELLARIS flash is tested on LM3S811, LM3S6965, LM3s3748, more.
  24 ***************************************************************************/
  25
  26 #ifdef HAVE_CONFIG_H
  27 #include "config.h"
  28 #endif
  29
  30 #include "jtag/interface.h"
  31 #include "imp.h"
  32 #include <target/algorithm.h>
  33 #include <target/armv7m.h>
  34
  35 #define DID0_VER(did0) ((did0 >> 28)&0x07)
  36
  37 /* STELLARIS control registers */
  38 #define SCB_BASE        0x400FE000
  39 #define DID0            0x000
  40 #define DID1            0x004
  41 #define DC0                     0x008
  42 #define DC1                     0x010
  43 #define DC2                     0x014
  44 #define DC3                     0x018
  45 #define DC4                     0x01C
  46
  47 #define RIS                     0x050
  48 #define RCC                     0x060
  49 #define PLLCFG          0x064
  50 #define RCC2            0x070
  51 #define NVMSTAT         0x1a0
  52
  53 /* "legacy" flash memory protection registers (64KB max) */
  54 #define FMPRE           0x130
  55 #define FMPPE           0x134
  56
  57 /* new flash memory protection registers (for more than 64KB) */
  58 #define FMPRE0          0x200           /* PRE1 = PRE0 + 4, etc */
  59 #define FMPPE0          0x400           /* PPE1 = PPE0 + 4, etc */
  60
  61 #define USECRL          0x140
  62
  63 #define FLASH_CONTROL_BASE      0x400FD000
  64 #define FLASH_FMA       (FLASH_CONTROL_BASE | 0x000)
  65 #define FLASH_FMD       (FLASH_CONTROL_BASE | 0x004)
  66 #define FLASH_FMC       (FLASH_CONTROL_BASE | 0x008)
  67 #define FLASH_CRIS      (FLASH_CONTROL_BASE | 0x00C)
  68 #define FLASH_CIM       (FLASH_CONTROL_BASE | 0x010)
  69 #define FLASH_MISC      (FLASH_CONTROL_BASE | 0x014)
  70 #define FLASH_FSIZE     (FLASH_CONTROL_BASE | 0xFC0)
  71 #define FLASH_SSIZE     (FLASH_CONTROL_BASE | 0xFC4)
  72
  73 #define AMISC   1
  74 #define PMISC   2
  75
  76 #define AMASK   1
  77 #define PMASK   2
  78
  79 /* Flash Controller Command bits */
  80 #define FMC_WRKEY       (0xA442 << 16)
  81 #define FMC_COMT        (1 << 3)
  82 #define FMC_MERASE      (1 << 2)
  83 #define FMC_ERASE       (1 << 1)
  84 #define FMC_WRITE       (1 << 0)
  85
  86 /* STELLARIS constants */
  87
  88 /* values to write in FMA to commit write-"once" values */
  89 #define FLASH_FMA_PRE(x)        (2 * (x))       /* for FMPPREx */
  90 #define FLASH_FMA_PPE(x)        (2 * (x) + 1)   /* for FMPPPEx */
  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         /* chip id register */
  97         uint32_t did0;
  98         uint32_t did1;
  99         uint32_t dc0;
 100         uint32_t dc1;
 101         uint32_t fsize;
 102         uint32_t ssize;
 103
 104         const char *target_name;
 105         uint8_t target_class;
 106
 107         uint32_t sramsiz;
 108         /* flash geometry */
 109         uint32_t num_pages;
 110         uint32_t pagesize;
 111
 112         /* main clock status */
 113         uint32_t rcc;
 114         uint32_t rcc2;
 115         uint8_t  mck_valid;
 116         uint8_t  xtal_mask;
 117         uint32_t iosc_freq;
 118         uint32_t mck_freq;
 119         const char *iosc_desc;
 120         const char *mck_desc;
 121 };
 122
 123 /* Autogenerated by contrib/gen-stellaris-part-header.pl */
 124 /* From Stellaris Firmware Development Package revision 9453 */
 125 static const struct {
 126         uint8_t class;
 127         uint8_t partno;
 128         const char *partname;
 129 } stellaris_parts[] = {
 130         {0x00, 0x01, "LM3S101"},
 131         {0x00, 0x02, "LM3S102"},
 132         {0x01, 0xBF, "LM3S1110"},
 133         {0x01, 0xC3, "LM3S1133"},
 134         {0x01, 0xC5, "LM3S1138"},
 135         {0x01, 0xC1, "LM3S1150"},
 136         {0x01, 0xC4, "LM3S1162"},
 137         {0x01, 0xC2, "LM3S1165"},
 138         {0x01, 0xEC, "LM3S1166"},
 139         {0x01, 0xC6, "LM3S1332"},
 140         {0x01, 0xBC, "LM3S1435"},
 141         {0x01, 0xBA, "LM3S1439"},
 142         {0x01, 0xBB, "LM3S1512"},
 143         {0x01, 0xC7, "LM3S1538"},
 144         {0x01, 0xDB, "LM3S1601"},
 145         {0x03, 0x06, "LM3S1607"},
 146         {0x01, 0xDA, "LM3S1608"},
 147         {0x01, 0xC0, "LM3S1620"},
 148         {0x04, 0xCD, "LM3S1621"},
 149         {0x03, 0x03, "LM3S1625"},
 150         {0x03, 0x04, "LM3S1626"},
 151         {0x03, 0x05, "LM3S1627"},
 152         {0x01, 0xB3, "LM3S1635"},
 153         {0x01, 0xEB, "LM3S1636"},
 154         {0x01, 0xBD, "LM3S1637"},
 155         {0x04, 0xB1, "LM3S1651"},
 156         {0x01, 0xB9, "LM3S1751"},
 157         {0x03, 0x10, "LM3S1776"},
 158         {0x04, 0x16, "LM3S1811"},
 159         {0x04, 0x3D, "LM3S1816"},
 160         {0x01, 0xB4, "LM3S1850"},
 161         {0x01, 0xDD, "LM3S1911"},
 162         {0x01, 0xDC, "LM3S1918"},
 163         {0x01, 0xB7, "LM3S1937"},
 164         {0x01, 0xBE, "LM3S1958"},
 165         {0x01, 0xB5, "LM3S1960"},
 166         {0x01, 0xB8, "LM3S1968"},
 167         {0x01, 0xEA, "LM3S1969"},
 168         {0x04, 0xCE, "LM3S1B21"},
 169         {0x06, 0xCA, "LM3S1C21"},
 170         {0x06, 0xCB, "LM3S1C26"},
 171         {0x06, 0x98, "LM3S1C58"},
 172         {0x06, 0xB0, "LM3S1D21"},
 173         {0x06, 0xCC, "LM3S1D26"},
 174         {0x06, 0x1D, "LM3S1F11"},
 175         {0x06, 0x1B, "LM3S1F16"},
 176         {0x06, 0xAF, "LM3S1G21"},
 177         {0x06, 0x95, "LM3S1G58"},
 178         {0x06, 0x1E, "LM3S1H11"},
 179         {0x06, 0x1C, "LM3S1H16"},
 180         {0x04, 0x0F, "LM3S1J11"},
 181         {0x04, 0x3C, "LM3S1J16"},
 182         {0x04, 0x0E, "LM3S1N11"},
 183         {0x04, 0x3B, "LM3S1N16"},
 184         {0x04, 0xB2, "LM3S1P51"},
 185         {0x04, 0x9E, "LM3S1R21"},
 186         {0x04, 0xC9, "LM3S1R26"},
 187         {0x04, 0x30, "LM3S1W16"},
 188         {0x04, 0x2F, "LM3S1Z16"},
 189         {0x01, 0x51, "LM3S2110"},
 190         {0x01, 0x84, "LM3S2139"},
 191         {0x03, 0x39, "LM3S2276"},
 192         {0x01, 0xA2, "LM3S2410"},
 193         {0x01, 0x59, "LM3S2412"},
 194         {0x01, 0x56, "LM3S2432"},
 195         {0x01, 0x5A, "LM3S2533"},
 196         {0x01, 0xE1, "LM3S2601"},
 197         {0x01, 0xE0, "LM3S2608"},
 198         {0x03, 0x33, "LM3S2616"},
 199         {0x01, 0x57, "LM3S2620"},
 200         {0x01, 0x85, "LM3S2637"},
 201         {0x01, 0x53, "LM3S2651"},
 202         {0x03, 0x80, "LM3S2671"},
 203         {0x03, 0x50, "LM3S2678"},
 204         {0x01, 0xA4, "LM3S2730"},
 205         {0x01, 0x52, "LM3S2739"},
 206         {0x03, 0x3A, "LM3S2776"},
 207         {0x04, 0x6D, "LM3S2793"},
 208         {0x01, 0xE3, "LM3S2911"},
 209         {0x01, 0xE2, "LM3S2918"},
 210         {0x01, 0xED, "LM3S2919"},
 211         {0x01, 0x54, "LM3S2939"},
 212         {0x01, 0x8F, "LM3S2948"},
 213         {0x01, 0x58, "LM3S2950"},
 214         {0x01, 0x55, "LM3S2965"},
 215         {0x04, 0x6C, "LM3S2B93"},
 216         {0x06, 0x94, "LM3S2D93"},
 217         {0x06, 0x93, "LM3S2U93"},
 218         {0x00, 0x19, "LM3S300"},
 219         {0x00, 0x11, "LM3S301"},
 220         {0x00, 0x1A, "LM3S308"},
 221         {0x00, 0x12, "LM3S310"},
 222         {0x00, 0x13, "LM3S315"},
 223         {0x00, 0x14, "LM3S316"},
 224         {0x00, 0x17, "LM3S317"},
 225         {0x00, 0x15, "LM3S328"},
 226         {0x03, 0x08, "LM3S3634"},
 227         {0x03, 0x43, "LM3S3651"},
 228         {0x04, 0xC8, "LM3S3654"},
 229         {0x03, 0x44, "LM3S3739"},
 230         {0x03, 0x49, "LM3S3748"},
 231         {0x03, 0x45, "LM3S3749"},
 232         {0x04, 0x42, "LM3S3826"},
 233         {0x04, 0x41, "LM3S3J26"},
 234         {0x04, 0x40, "LM3S3N26"},
 235         {0x04, 0x3F, "LM3S3W26"},
 236         {0x04, 0x3E, "LM3S3Z26"},
 237         {0x03, 0x81, "LM3S5632"},
 238         {0x04, 0x0C, "LM3S5651"},
 239         {0x03, 0x8A, "LM3S5652"},
 240         {0x04, 0x4D, "LM3S5656"},
 241         {0x03, 0x91, "LM3S5662"},
 242         {0x03, 0x96, "LM3S5732"},
 243         {0x03, 0x97, "LM3S5737"},
 244         {0x03, 0xA0, "LM3S5739"},
 245         {0x03, 0x99, "LM3S5747"},
 246         {0x03, 0xA7, "LM3S5749"},
 247         {0x03, 0x9A, "LM3S5752"},
 248         {0x03, 0x9C, "LM3S5762"},
 249         {0x04, 0x69, "LM3S5791"},
 250         {0x04, 0x0B, "LM3S5951"},
 251         {0x04, 0x4E, "LM3S5956"},
 252         {0x04, 0x68, "LM3S5B91"},
 253         {0x06, 0x2E, "LM3S5C31"},
 254         {0x06, 0x2C, "LM3S5C36"},
 255         {0x06, 0x5E, "LM3S5C51"},
 256         {0x06, 0x5B, "LM3S5C56"},
 257         {0x06, 0x5F, "LM3S5D51"},
 258         {0x06, 0x5C, "LM3S5D56"},
 259         {0x06, 0x87, "LM3S5D91"},
 260         {0x06, 0x2D, "LM3S5G31"},
 261         {0x06, 0x1F, "LM3S5G36"},
 262         {0x06, 0x5D, "LM3S5G51"},
 263         {0x06, 0x4F, "LM3S5G56"},
 264         {0x04, 0x09, "LM3S5K31"},
 265         {0x04, 0x4A, "LM3S5K36"},
 266         {0x04, 0x0A, "LM3S5P31"},
 267         {0x04, 0x48, "LM3S5P36"},
 268         {0x04, 0xB6, "LM3S5P3B"},
 269         {0x04, 0x0D, "LM3S5P51"},
 270         {0x04, 0x4C, "LM3S5P56"},
 271         {0x04, 0x07, "LM3S5R31"},
 272         {0x04, 0x4B, "LM3S5R36"},
 273         {0x04, 0x47, "LM3S5T36"},
 274         {0x06, 0x7F, "LM3S5U91"},
 275         {0x04, 0x46, "LM3S5Y36"},
 276         {0x00, 0x2A, "LM3S600"},
 277         {0x00, 0x21, "LM3S601"},
 278         {0x00, 0x2B, "LM3S608"},
 279         {0x00, 0x22, "LM3S610"},
 280         {0x01, 0xA1, "LM3S6100"},
 281         {0x00, 0x23, "LM3S611"},
 282         {0x01, 0x74, "LM3S6110"},
 283         {0x00, 0x24, "LM3S612"},
 284         {0x00, 0x25, "LM3S613"},
 285         {0x00, 0x26, "LM3S615"},
 286         {0x00, 0x28, "LM3S617"},
 287         {0x00, 0x29, "LM3S618"},
 288         {0x00, 0x27, "LM3S628"},
 289         {0x01, 0xA5, "LM3S6420"},
 290         {0x01, 0x82, "LM3S6422"},
 291         {0x01, 0x75, "LM3S6432"},
 292         {0x01, 0x76, "LM3S6537"},
 293         {0x01, 0x71, "LM3S6610"},
 294         {0x01, 0xE7, "LM3S6611"},
 295         {0x01, 0xE6, "LM3S6618"},
 296         {0x01, 0x83, "LM3S6633"},
 297         {0x01, 0x8B, "LM3S6637"},
 298         {0x01, 0xA3, "LM3S6730"},
 299         {0x01, 0x77, "LM3S6753"},
 300         {0x01, 0xE9, "LM3S6911"},
 301         {0x01, 0xE8, "LM3S6918"},
 302         {0x01, 0x89, "LM3S6938"},
 303         {0x01, 0x72, "LM3S6950"},
 304         {0x01, 0x78, "LM3S6952"},
 305         {0x01, 0x73, "LM3S6965"},
 306         {0x06, 0xAA, "LM3S6C11"},
 307         {0x06, 0xAC, "LM3S6C65"},
 308         {0x06, 0x9F, "LM3S6G11"},
 309         {0x06, 0xAB, "LM3S6G65"},
 310         {0x00, 0x38, "LM3S800"},
 311         {0x00, 0x31, "LM3S801"},
 312         {0x00, 0x39, "LM3S808"},
 313         {0x00, 0x32, "LM3S811"},
 314         {0x00, 0x33, "LM3S812"},
 315         {0x00, 0x34, "LM3S815"},
 316         {0x00, 0x36, "LM3S817"},
 317         {0x00, 0x37, "LM3S818"},
 318         {0x00, 0x35, "LM3S828"},
 319         {0x01, 0x64, "LM3S8530"},
 320         {0x01, 0x8E, "LM3S8538"},
 321         {0x01, 0x61, "LM3S8630"},
 322         {0x01, 0x63, "LM3S8730"},
 323         {0x01, 0x8D, "LM3S8733"},
 324         {0x01, 0x86, "LM3S8738"},
 325         {0x01, 0x65, "LM3S8930"},
 326         {0x01, 0x8C, "LM3S8933"},
 327         {0x01, 0x88, "LM3S8938"},
 328         {0x01, 0xA6, "LM3S8962"},
 329         {0x01, 0x62, "LM3S8970"},
 330         {0x01, 0xD7, "LM3S8971"},
 331         {0x06, 0xAE, "LM3S8C62"},
 332         {0x06, 0xAD, "LM3S8G62"},
 333         {0x04, 0xCF, "LM3S9781"},
 334         {0x04, 0x67, "LM3S9790"},
 335         {0x04, 0x6B, "LM3S9792"},
 336         {0x04, 0x2D, "LM3S9971"},
 337         {0x04, 0x20, "LM3S9997"},
 338         {0x04, 0xD0, "LM3S9B81"},
 339         {0x04, 0x66, "LM3S9B90"},
 340         {0x04, 0x6A, "LM3S9B92"},
 341         {0x04, 0x6E, "LM3S9B95"},
 342         {0x04, 0x6F, "LM3S9B96"},
 343         {0x04, 0x1D, "LM3S9BN2"},
 344         {0x04, 0x1E, "LM3S9BN5"},
 345         {0x04, 0x1F, "LM3S9BN6"},
 346         {0x06, 0x70, "LM3S9C97"},
 347         {0x06, 0xA9, "LM3S9D81"},
 348         {0x06, 0x7E, "LM3S9D90"},
 349         {0x06, 0x92, "LM3S9D92"},
 350         {0x06, 0x9D, "LM3S9D96"},
 351         {0x06, 0x7B, "LM3S9DN5"},
 352         {0x06, 0x7C, "LM3S9DN6"},
 353         {0x06, 0x60, "LM3S9G97"},
 354         {0x06, 0x79, "LM3S9GN5"},
 355         {0x04, 0x1B, "LM3S9L71"},
 356         {0x04, 0x18, "LM3S9L97"},
 357         {0x06, 0xA8, "LM3S9U81"},
 358         {0x06, 0x7D, "LM3S9U90"},
 359         {0x06, 0x90, "LM3S9U92"},
 360         {0x06, 0x9B, "LM3S9U96"},
 361         {0x05, 0x01, "LM4F120B2QR/TM4C1233C3PM"},
 362         {0x05, 0x02, "LM4F120C4QR/TM4C1233D5PM"},
 363         {0x05, 0x03, "LM4F120E5QR/TM4C1233E6PM"},
 364         {0x05, 0x04, "LM4F120H5QR/TM4C1233H6PM"},
 365         {0x05, 0x08, "LM4F121B2QR/TM4C1232C3PM"},
 366         {0x05, 0x09, "LM4F121C4QR/TM4C1232D5PM"},
 367         {0x05, 0x0A, "LM4F121E5QR/TM4C1232E6PM"},
 368         {0x05, 0x0B, "LM4F121H5QR/TM4C1232H6PM"},
 369         {0x05, 0x10, "LM4F110E5QR/TM4C1231E6PM"},
 370         {0x05, 0x11, "LM4F110H5QR/TM4C1231H6PM"},
 371         {0x05, 0x18, "LM4F110B2QR/TM4C1231C3PM"},
 372         {0x05, 0x19, "LM4F110C4QR/TM4C1231D5PM"},
 373         {0x05, 0x20, "LM4F111E5QR/TM4C1230E6PM"},
 374         {0x05, 0x21, "LM4F111H5QR/TM4C1230H6PM"},
 375         {0x05, 0x22, "LM4F111B2QR/TM4C1230C3PM"},
 376         {0x05, 0x23, "LM4F111C4QR/TM4C1230D5PM"},
 377         {0x05, 0x30, "LM4F112E5QC/TM4C1231E6PZ"},
 378         {0x05, 0x31, "LM4F112H5QC/TM4C1231H6PZ"},
 379         {0x05, 0x35, "LM4F112H5QD/TM4C1231H6PGE"},
 380         {0x05, 0x36, "LM4F112C4QC/TM4C1231D5PZ"},
 381         {0x05, 0x40, "LM4F130E5QR/TM4C1237E6PM"},
 382         {0x05, 0x41, "LM4F130H5QR/TM4C1237H6PM"},
 383         {0x05, 0x48, "LM4F130C4QR/TM4C1237D5PM"},
 384         {0x05, 0x50, "LM4F131E5QR/TM4C1236E6PM"},
 385         {0x05, 0x51, "LM4F131H5QR/TM4C1236H6PM"},
 386         {0x05, 0x52, "LM4F131C4QR/TM4C1236D5PM"},
 387         {0x05, 0x60, "LM4F132E5QC/TM4C1237E6PZ"},
 388         {0x05, 0x61, "LM4F132H5QC/TM4C1237H6PZ"},
 389         {0x05, 0x65, "LM4F132H5QD/TM4C1237H6PGE"},
 390         {0x05, 0x66, "LM4F132C4QC/TM4C1237D5PZ"},
 391         {0x05, 0x70, "LM4F210E5QR/TM4C123BE6PM"},
 392         {0x05, 0x73, "LM4F210H5QR/TM4C123BH6PM"},
 393         {0x05, 0x80, "LM4F211E5QR/TM4C123AE6PM"},
 394         {0x05, 0x83, "LM4F211H5QR/TM4C123AH6PM"},
 395         {0x05, 0xA0, "LM4F230E5QR/TM4C123GE6PM"},
 396         {0x05, 0xA1, "LM4F230H5QR/TM4C123GH6PM"},
 397         {0x05, 0xB0, "LM4F231E5QR/TM4C123FE6PM"},
 398         {0x05, 0xB1, "LM4F231H5QR/TM4C123FH6PM"},
 399         {0x05, 0xC0, "LM4F232E5QC/TM4C123GE6PZ"},
 400         {0x05, 0xC1, "LM4F232H5QC/TM4C123GH6PZ"},
 401         {0x05, 0xC3, "LM4F212E5QC/TM4C123BE6PZ"},
 402         {0x05, 0xC4, "LM4F212H5QC/TM4C123BH6PZ"},
 403         {0x05, 0xC5, "LM4F232H5QD/TM4C123GH6PGE"},
 404         {0x05, 0xC6, "LM4F212H5QD/TM4C123BH6PGE"},
 405         {0x05, 0xD0, "LM4F122C4QC/TM4C1233D5PZ"},
 406         {0x05, 0xD1, "LM4F122E5QC/TM4C1233E6PZ"},
 407         {0x05, 0xD2, "LM4F122H5QC/TM4C1233H6PZ"},
 408         {0x05, 0xD6, "LM4F122H5QD/TM4C1233H6PGE"},
 409         {0x05, 0xE1, "LM4FSXLH5BB"},
 410         {0x05, 0xE3, "LM4F232H5BB/TM4C123GH6ZRB"},
 411         {0x05, 0xE4, "LM4FS99H5BB"},
 412         {0x05, 0xE5, "LM4FS1AH5BB"},
 413         {0x05, 0xE9, "LM4F212H5BB/TM4C123BH6ZRB"},
 414         {0x05, 0xEA, "LM4FS1GH5BB"},
 415         {0x05, 0xF0, "TM4C123GH6ZXR"},
 416         {0x0A, 0x19, "TM4C1290NCPDT"},
 417         {0x0A, 0x1B, "TM4C1290NCZAD"},
 418         {0x0A, 0x1C, "TM4C1292NCPDT"},
 419         {0x0A, 0x1E, "TM4C1292NCZAD"},
 420         {0x0A, 0x1F, "TM4C1294NCPDT"},
 421         {0x0A, 0x21, "TM4C1294NCZAD"},
 422         {0x0A, 0x22, "TM4C1297NCZAD"},
 423         {0x0A, 0x23, "TM4C1299NCZAD"},
 424         {0x0A, 0x24, "TM4C129CNCPDT"},
 425         {0x0A, 0x26, "TM4C129CNCZAD"},
 426         {0x0A, 0x27, "TM4C129DNCPDT"},
 427         {0x0A, 0x29, "TM4C129DNCZAD"},
 428         {0x0A, 0x2D, "TM4C129ENCPDT"},
 429         {0x0A, 0x2F, "TM4C129ENCZAD"},
 430         {0x0A, 0x30, "TM4C129LNCZAD"},
 431         {0x0A, 0x32, "TM4C129XNCZAD"},
 432         {0x0A, 0x34, "TM4C1294KCPDT"},
 433         {0x0A, 0x35, "TM4C129EKCPDT"},
 434         {0x0A, 0x36, "TM4C1299KCZAD"},
 435         {0x0A, 0x37, "TM4C129XKCZAD"},
 436         {0xFF, 0x00, "Unknown Part"}
 437 };
 438
 439 static const char * const stellaris_classname[] = {
 440         "Sandstorm",
 441         "Fury",
 442         "Unknown",
 443         "DustDevil",
 444         "Tempest",
 445         "Blizzard/TM4C123x",
 446         "Firestorm",
 447         "",
 448         "",
 449         "",
 450         "Snowflake",
 451 };
 452
 453 /***************************************************************************
 454 *       openocd command interface                                              *
 455 ***************************************************************************/
 456
 457 /* flash_bank stellaris <base> <size> 0 0 <target#>
 458  */
 459 FLASH_BANK_COMMAND_HANDLER(stellaris_flash_bank_command)
 460 {
 461         struct stellaris_flash_bank *stellaris_info;
 462
 463         if (CMD_ARGC < 6)
 464                 return ERROR_COMMAND_SYNTAX_ERROR;
 465
 466         stellaris_info = calloc(sizeof(struct stellaris_flash_bank), 1);
 467         bank->base = 0x0;
 468         bank->driver_priv = stellaris_info;
 469
 470         stellaris_info->target_name = "Unknown target";
 471
 472         /* part wasn't probed for info yet */
 473         stellaris_info->did1 = 0;
 474
 475         /* TODO Specify the main crystal speed in kHz using an optional
 476          * argument; ditto, the speed of an external oscillator used
 477          * instead of a crystal.  Avoid programming flash using IOSC.
 478          */
 479         return ERROR_OK;
 480 }
 481
 482 static int get_stellaris_info(struct flash_bank *bank, struct command_invocation *cmd)
 483 {
 484         struct stellaris_flash_bank *stellaris_info = bank->driver_priv;
 485
 486         if (stellaris_info->did1 == 0)
 487                 return ERROR_FLASH_BANK_NOT_PROBED;
 488
 489         /* Read main and master clock frequency register */
 490         stellaris_read_clock_info(bank);
 491
 492         command_print_sameline(cmd,
 493                         "\nTI/LMI Stellaris information: Chip is "
 494                         "class %i (%s) %s rev %c%i\n",
 495                         stellaris_info->target_class,
 496                         stellaris_classname[stellaris_info->target_class],
 497                         stellaris_info->target_name,
 498                         (int)('A' + ((stellaris_info->did0 >> 8) & 0xFF)),
 499                         (int)((stellaris_info->did0) & 0xFF));
 500
 501         command_print_sameline(cmd,
 502                         "did1: 0x%8.8" PRIx32 ", arch: 0x%4.4" PRIx32
 503                         ", eproc: %s, ramsize: %" PRIu32 "k, flashsize: %" PRIu32 "k\n",
 504                         stellaris_info->did1,
 505                         stellaris_info->did1,
 506                         "ARMv7M",
 507                         stellaris_info->sramsiz,
 508                         (uint32_t)(stellaris_info->num_pages * stellaris_info->pagesize / 1024));
 509
 510         command_print_sameline(cmd,
 511                         "master clock: %ikHz%s, "
 512                         "rcc is 0x%" PRIx32 ", rcc2 is 0x%" PRIx32 ", "
 513                         "pagesize: %" PRIu32 ", pages: %" PRIu32,
 514                         (int)(stellaris_info->mck_freq / 1000),
 515                         stellaris_info->mck_desc,
 516                         stellaris_info->rcc,
 517                         stellaris_info->rcc2,
 518                         stellaris_info->pagesize,
 519                         stellaris_info->num_pages);
 520
 521         return ERROR_OK;
 522 }
 523
 524 /***************************************************************************
 525 *       chip identification and status                                         *
 526 ***************************************************************************/
 527
 528 /* Set the flash timing register to match current clocking */
 529 static void stellaris_set_flash_timing(struct flash_bank *bank)
 530 {
 531         struct stellaris_flash_bank *stellaris_info = bank->driver_priv;
 532         struct target *target = bank->target;
 533         uint32_t usecrl = (stellaris_info->mck_freq/1000000ul-1);
 534
 535         /* only valid for Sandstorm and Fury class devices */
 536         if (stellaris_info->target_class > 1)
 537                 return;
 538
 539         LOG_DEBUG("usecrl = %i", (int)(usecrl));
 540         target_write_u32(target, SCB_BASE | USECRL, usecrl);
 541 }
 542
 543 static const unsigned rcc_xtal[32] = {
 544         [0x00] = 1000000,               /* no pll */
 545         [0x01] = 1843200,               /* no pll */
 546         [0x02] = 2000000,               /* no pll */
 547         [0x03] = 2457600,               /* no pll */
 548
 549         [0x04] = 3579545,
 550         [0x05] = 3686400,
 551         [0x06] = 4000000,               /* usb */
 552         [0x07] = 4096000,
 553
 554         [0x08] = 4915200,
 555         [0x09] = 5000000,               /* usb */
 556         [0x0a] = 5120000,
 557         [0x0b] = 6000000,               /* (reset) usb */
 558
 559         [0x0c] = 6144000,
 560         [0x0d] = 7372800,
 561         [0x0e] = 8000000,               /* usb */
 562         [0x0f] = 8192000,
 563
 564         /* parts before DustDevil use just 4 bits for xtal spec */
 565
 566         [0x10] = 10000000,              /* usb */
 567         [0x11] = 12000000,              /* usb */
 568         [0x12] = 12288000,
 569         [0x13] = 13560000,
 570
 571         [0x14] = 14318180,
 572         [0x15] = 16000000,              /* usb */
 573         [0x16] = 16384000,
 574 };
 575
 576 /** Read clock configuration and set stellaris_info->usec_clocks. */
 577 static void stellaris_read_clock_info(struct flash_bank *bank)
 578 {
 579         struct stellaris_flash_bank *stellaris_info = bank->driver_priv;
 580         struct target *target = bank->target;
 581         uint32_t rcc, rcc2, pllcfg, sysdiv, usesysdiv, bypass, oscsrc;
 582         unsigned xtal;
 583         unsigned long mainfreq;
 584
 585         target_read_u32(target, SCB_BASE | RCC, &rcc);
 586         LOG_DEBUG("Stellaris RCC %" PRIx32 "", rcc);
 587
 588         target_read_u32(target, SCB_BASE | RCC2, &rcc2);
 589         LOG_DEBUG("Stellaris RCC2 %" PRIx32 "", rcc);
 590
 591         target_read_u32(target, SCB_BASE | PLLCFG, &pllcfg);
 592         LOG_DEBUG("Stellaris PLLCFG %" PRIx32 "", pllcfg);
 593
 594         stellaris_info->rcc = rcc;
 595         stellaris_info->rcc2 = rcc2;
 596
 597         sysdiv = (rcc >> 23) & 0xF;
 598         usesysdiv = (rcc >> 22) & 0x1;
 599         bypass = (rcc >> 11) & 0x1;
 600         oscsrc = (rcc >> 4) & 0x3;
 601         xtal = (rcc >> 6) & stellaris_info->xtal_mask;
 602
 603         /* NOTE: post-Sandstorm parts have RCC2 which may override
 604          * parts of RCC ... with more sysdiv options, option for
 605          * 32768 Hz mainfreq, PLL controls.  On Sandstorm it reads
 606          * as zero, so the "use RCC2" flag is always clear.
 607          */
 608         if (rcc2 & (1 << 31)) {
 609                 sysdiv = (rcc2 >> 23) & 0x3F;
 610                 bypass = (rcc2 >> 11) & 0x1;
 611                 oscsrc = (rcc2 >> 4) & 0x7;
 612
 613                 /* FIXME Tempest parts have an additional lsb for
 614                  * fractional sysdiv (200 MHz / 2.5 == 80 MHz)
 615                  */
 616         }
 617
 618         stellaris_info->mck_desc = "";
 619
 620         switch (oscsrc) {
 621                 case 0:                         /* MOSC */
 622                         mainfreq = rcc_xtal[xtal];
 623                         break;
 624                 case 1:                         /* IOSC */
 625                         mainfreq = stellaris_info->iosc_freq;
 626                         stellaris_info->mck_desc = stellaris_info->iosc_desc;
 627                         break;
 628                 case 2:                         /* IOSC/4 */
 629                         mainfreq = stellaris_info->iosc_freq / 4;
 630                         stellaris_info->mck_desc = stellaris_info->iosc_desc;
 631                         break;
 632                 case 3:                         /* lowspeed */
 633                         /* Sandstorm doesn't have this 30K +/- 30% osc */
 634                         mainfreq = 30000;
 635                         stellaris_info->mck_desc = " (±30%)";
 636                         break;
 637                 case 8:                         /* hibernation osc */
 638                         /* not all parts support hibernation */
 639                         mainfreq = 32768;
 640                         break;
 641
 642                 default: /* NOTREACHED */
 643                         mainfreq = 0;
 644                         break;
 645         }
 646
 647         /* PLL is used if it's not bypassed; its output is 200 MHz
 648          * even when it runs at 400 MHz (adds divide-by-two stage).
 649          */
 650         if (!bypass)
 651                 mainfreq = 200000000;
 652
 653         if (usesysdiv)
 654                 stellaris_info->mck_freq = mainfreq/(1 + sysdiv);
 655         else
 656                 stellaris_info->mck_freq = mainfreq;
 657 }
 658
 659 /* Read device id register, main clock frequency register and fill in driver info structure */
 660 static int stellaris_read_part_info(struct flash_bank *bank)
 661 {
 662         struct stellaris_flash_bank *stellaris_info = bank->driver_priv;
 663         struct target *target = bank->target;
 664         uint32_t did0, did1, ver, fam;
 665         int i;
 666
 667         /* Read and parse chip identification register */
 668         target_read_u32(target, SCB_BASE | DID0, &did0);
 669         target_read_u32(target, SCB_BASE | DID1, &did1);
 670         target_read_u32(target, SCB_BASE | DC0, &stellaris_info->dc0);
 671         target_read_u32(target, SCB_BASE | DC1, &stellaris_info->dc1);
 672         LOG_DEBUG("did0 0x%" PRIx32 ", did1 0x%" PRIx32 ", dc0 0x%" PRIx32 ", dc1 0x%" PRIx32 "",
 673                   did0, did1, stellaris_info->dc0, stellaris_info->dc1);
 674
 675         ver = DID0_VER(did0);
 676         if ((ver != 0) && (ver != 1)) {
 677                 LOG_WARNING("Unknown did0 version, cannot identify target");
 678                 return ERROR_FLASH_OPERATION_FAILED;
 679         }
 680
 681         if (did1 == 0) {
 682                 LOG_WARNING("Cannot identify target as a Stellaris");
 683                 return ERROR_FLASH_OPERATION_FAILED;
 684         }
 685
 686         ver = did1 >> 28;
 687         fam = (did1 >> 24) & 0xF;
 688         if (((ver != 0) && (ver != 1)) || (fam != 0)) {
 689                 LOG_WARNING("Unknown did1 version/family.");
 690                 return ERROR_FLASH_OPERATION_FAILED;
 691         }
 692
 693         /* For Sandstorm, Fury, DustDevil:  current data sheets say IOSC
 694          * is 12 MHz, but some older parts have 15 MHz.  A few data sheets
 695          * even give _both_ numbers!  We'll use current numbers; IOSC is
 696          * always approximate.
 697          *
 698          * For Tempest:  IOSC is calibrated, 16 MHz
 699          * For Blizzard:  IOSC is calibrated, 16 MHz
 700          * For Firestorm:  IOSC is calibrated, 16 MHz
 701          */
 702         stellaris_info->iosc_freq = 12000000;
 703         stellaris_info->iosc_desc = " (±30%)";
 704         stellaris_info->xtal_mask = 0x0f;
 705
 706         /* get device class */
 707         if (DID0_VER(did0) > 0) {
 708                 stellaris_info->target_class = (did0 >> 16) & 0xFF;
 709         } else {
 710                 /* Sandstorm class */
 711                 stellaris_info->target_class = 0;
 712         }
 713
 714         switch (stellaris_info->target_class) {
 715                 case 0:                         /* Sandstorm */
 716                         /*
 717                          * Current (2009-August) parts seem to be rev C2 and use 12 MHz.
 718                          * Parts before rev C0 used 15 MHz; some C0 parts use 15 MHz
 719                          * (LM3S618), but some other C0 parts are 12 MHz (LM3S811).
 720                          */
 721                         if (((did0 >> 8) & 0xff) < 2) {
 722                                 stellaris_info->iosc_freq = 15000000;
 723                                 stellaris_info->iosc_desc = " (±50%)";
 724                         }
 725                         break;
 726
 727                 case 1:                 /* Fury */
 728                         break;
 729
 730                 case 4:                 /* Tempest */
 731                 case 5:                 /* Blizzard */
 732                 case 6:                 /* Firestorm */
 733                 case 0xa:               /* Snowflake */
 734                         stellaris_info->iosc_freq = 16000000;   /* +/- 1% */
 735                         stellaris_info->iosc_desc = " (±1%)";
 736                         /* FALL THROUGH */
 737
 738                 case 3:                 /* DustDevil */
 739                         stellaris_info->xtal_mask = 0x1f;
 740                         break;
 741
 742                 default:
 743                         LOG_WARNING("Unknown did0 class");
 744         }
 745
 746         for (i = 0; stellaris_parts[i].partno; i++) {
 747                 if ((stellaris_parts[i].partno == ((did1 >> 16) & 0xFF)) &&
 748                                 (stellaris_parts[i].class == stellaris_info->target_class))
 749                         break;
 750         }
 751
 752         stellaris_info->target_name = stellaris_parts[i].partname;
 753
 754         stellaris_info->did0 = did0;
 755         stellaris_info->did1 = did1;
 756
 757         if (stellaris_info->target_class == 5) { /* Blizzard */
 758                 target_read_u32(target, FLASH_FSIZE, &stellaris_info->fsize);
 759                 target_read_u32(target, FLASH_SSIZE, &stellaris_info->ssize);
 760
 761                 stellaris_info->num_pages = 2 * (1 + (stellaris_info->fsize & 0xFFFF));
 762                 stellaris_info->sramsiz = (1 + (stellaris_info->ssize & 0xFFFF)) / 4;
 763                 stellaris_info->pagesize = 1024;
 764         } else if (stellaris_info->target_class == 0xa) { /* Snowflake */
 765                 target_read_u32(target, FLASH_FSIZE, &stellaris_info->fsize);
 766                 target_read_u32(target, FLASH_SSIZE, &stellaris_info->ssize);
 767
 768                 stellaris_info->pagesize = (1 << ((stellaris_info->fsize >> 16) & 7)) * 1024;
 769                 stellaris_info->num_pages = 2048 * (1 + (stellaris_info->fsize & 0xFFFF)) /
 770                         stellaris_info->pagesize;
 771                 stellaris_info->sramsiz = (1 + (stellaris_info->ssize & 0xFFFF)) / 4;
 772         } else {
 773                 stellaris_info->num_pages = 2 * (1 + (stellaris_info->dc0 & 0xFFFF));
 774                 stellaris_info->sramsiz = (1 + ((stellaris_info->dc0 >> 16) & 0xFFFF)) / 4;
 775                 stellaris_info->pagesize = 1024;
 776         }
 777
 778         /* REVISIT for at least Tempest parts, read NVMSTAT.FWB too.
 779          * That exposes a 32-word Flash Write Buffer ... enabling
 780          * writes of more than one word at a time.
 781          */
 782
 783         return ERROR_OK;
 784 }
 785
 786 /***************************************************************************
 787 *       flash operations                                                       *
 788 ***************************************************************************/
 789
 790 static int stellaris_protect_check(struct flash_bank *bank)
 791 {
 792         struct stellaris_flash_bank *stellaris = bank->driver_priv;
 793         struct target *target = bank->target;
 794         uint32_t flash_sizek = stellaris->pagesize / 1024 *
 795                 stellaris->num_pages;
 796         uint32_t fmppe_addr;
 797         int status = ERROR_OK;
 798
 799         if (stellaris->did1 == 0)
 800                 return ERROR_FLASH_BANK_NOT_PROBED;
 801
 802         for (unsigned int i = 0; i < bank->num_sectors; i++)
 803                 bank->sectors[i].is_protected = -1;
 804
 805         /* Read each Flash Memory Protection Program Enable (FMPPE) register
 806          * to report any pages that we can't write.  Ignore the Read Enable
 807          * register (FMPRE).
 808          */
 809
 810         if (stellaris->target_class >= 0x0a || flash_sizek > 64)
 811                 fmppe_addr = SCB_BASE | FMPPE0;
 812         else
 813                 fmppe_addr = SCB_BASE | FMPPE;
 814
 815         unsigned int page = 0, lockbitnum, lockbitcnt = flash_sizek / 2;
 816         unsigned int bits_per_page = stellaris->pagesize / 2048;
 817         /* Every lock bit always corresponds to a 2k region */
 818         for (lockbitnum = 0; lockbitnum < lockbitcnt; lockbitnum += 32) {
 819                 uint32_t fmppe;
 820
 821                 target_read_u32(target, fmppe_addr, &fmppe);
 822                 for (unsigned int i = 0; i < 32 && lockbitnum + i < lockbitcnt; i++) {
 823                         bool protect = !(fmppe & (1 << i));
 824                         if (bits_per_page) {
 825                                 bank->sectors[page++].is_protected = protect;
 826                                 i += bits_per_page - 1;
 827                         } else { /* 1024k pages, every lockbit covers 2 pages */
 828                                 bank->sectors[page++].is_protected = protect;
 829                                 bank->sectors[page++].is_protected = protect;
 830                         }
 831                 }
 832                 fmppe_addr += 4;
 833         }
 834
 835         return status;
 836 }
 837
 838 static int stellaris_erase(struct flash_bank *bank, unsigned int first,
 839                 unsigned int last)
 840 {
 841         uint32_t flash_fmc, flash_cris;
 842         struct stellaris_flash_bank *stellaris_info = bank->driver_priv;
 843         struct target *target = bank->target;
 844
 845         if (bank->target->state != TARGET_HALTED) {
 846                 LOG_ERROR("Target not halted");
 847                 return ERROR_TARGET_NOT_HALTED;
 848         }
 849
 850         if (stellaris_info->did1 == 0)
 851                 return ERROR_FLASH_BANK_NOT_PROBED;
 852
 853         if ((last < first) || (last >= stellaris_info->num_pages))
 854                 return ERROR_FLASH_SECTOR_INVALID;
 855
 856         if ((first == 0) && (last == (stellaris_info->num_pages - 1)))
 857                 return stellaris_mass_erase(bank);
 858
 859         /* Refresh flash controller timing */
 860         stellaris_read_clock_info(bank);
 861         stellaris_set_flash_timing(bank);
 862
 863         /* Clear and disable flash programming interrupts */
 864         target_write_u32(target, FLASH_CIM, 0);
 865         target_write_u32(target, FLASH_MISC, PMISC | AMISC);
 866
 867         /* REVISIT this clobbers state set by any halted firmware ...
 868          * it might want to process those IRQs.
 869          */
 870
 871         for (unsigned int banknr = first; banknr <= last; banknr++) {
 872                 /* Address is first word in page */
 873                 target_write_u32(target, FLASH_FMA, banknr * stellaris_info->pagesize);
 874                 /* Write erase command */
 875                 target_write_u32(target, FLASH_FMC, FMC_WRKEY | FMC_ERASE);
 876                 /* Wait until erase complete */
 877                 do {
 878                         target_read_u32(target, FLASH_FMC, &flash_fmc);
 879                 } while (flash_fmc & FMC_ERASE);
 880
 881                 /* Check access violations */
 882                 target_read_u32(target, FLASH_CRIS, &flash_cris);
 883                 if (flash_cris & (AMASK)) {
 884                         LOG_WARNING("Error erasing flash page %i,  flash_cris 0x%" PRIx32 "",
 885                                         banknr, flash_cris);
 886                         target_write_u32(target, FLASH_CRIS, 0);
 887                         return ERROR_FLASH_OPERATION_FAILED;
 888                 }
 889         }
 890
 891         return ERROR_OK;
 892 }
 893
 894 static int stellaris_protect(struct flash_bank *bank, int set,
 895                 unsigned int first, unsigned int last)
 896 {
 897         struct stellaris_flash_bank *stellaris = bank->driver_priv;
 898         struct target *target = bank->target;
 899         uint32_t flash_fmc, flash_cris;
 900         unsigned int bits_per_page = stellaris->pagesize / 2048;
 901
 902         if (target->state != TARGET_HALTED) {
 903                 LOG_ERROR("Target not halted");
 904                 return ERROR_TARGET_NOT_HALTED;
 905         }
 906
 907         if (!set) {
 908                 LOG_ERROR("Hardware doesn't support page-level unprotect. "
 909                         "Try the 'recover' command.");
 910                 return ERROR_COMMAND_SYNTAX_ERROR;
 911         }
 912
 913         if (stellaris->did1 == 0)
 914                 return ERROR_FLASH_BANK_NOT_PROBED;
 915
 916         if (stellaris->target_class == 0x03 &&
 917             !((stellaris->did0 >> 8) & 0xFF) &&
 918             !((stellaris->did0) & 0xFF)) {
 919                 LOG_ERROR("DustDevil A0 parts can't be unprotected, see errata; refusing to proceed");
 920                 return ERROR_FLASH_OPERATION_FAILED;
 921         }
 922
 923         if (!bits_per_page && (first % 2 || !(last % 2))) {
 924                 LOG_ERROR("Can't protect unaligned pages");
 925                 return ERROR_FLASH_SECTOR_INVALID;
 926         }
 927
 928         /* Refresh flash controller timing */
 929         stellaris_read_clock_info(bank);
 930         stellaris_set_flash_timing(bank);
 931
 932         /* Clear and disable flash programming interrupts */
 933         target_write_u32(target, FLASH_CIM, 0);
 934         target_write_u32(target, FLASH_MISC, PMISC | AMISC);
 935
 936         uint32_t flash_sizek = stellaris->pagesize / 1024 *
 937                 stellaris->num_pages;
 938         uint32_t fmppe_addr;
 939
 940         if (stellaris->target_class >= 0x0a || flash_sizek > 64)
 941                 fmppe_addr = SCB_BASE | FMPPE0;
 942         else
 943                 fmppe_addr = SCB_BASE | FMPPE;
 944
 945         unsigned int page = 0;
 946         unsigned int lockbitnum, lockbitcnt = flash_sizek / 2;
 947         /* Every lock bit always corresponds to a 2k region */
 948         for (lockbitnum = 0; lockbitnum < lockbitcnt; lockbitnum += 32) {
 949                 uint32_t fmppe;
 950
 951                 target_read_u32(target, fmppe_addr, &fmppe);
 952                 for (unsigned int i = 0;
 953                      i < 32 && lockbitnum + i < lockbitcnt;
 954                      i++) {
 955                         if (page >= first && page <= last)
 956                                 fmppe &= ~(1 << i);
 957
 958                         if (bits_per_page) {
 959                                 if (!((i + 1) % bits_per_page))
 960                                         page++;
 961                         } else { /* 1024k pages, every lockbit covers 2 pages */
 962                                 page += 2;
 963                         }
 964                 }
 965                 target_write_u32(target, fmppe_addr, fmppe);
 966
 967                 /* Commit FMPPE* */
 968                 target_write_u32(target, FLASH_FMA, 1 + lockbitnum / 16);
 969                 /* Write commit command */
 970                 target_write_u32(target, FLASH_FMC, FMC_WRKEY | FMC_COMT);
 971
 972                 /* Wait until commit complete */
 973                 do {
 974                         target_read_u32(target, FLASH_FMC, &flash_fmc);
 975                 } while (flash_fmc & FMC_COMT);
 976
 977                 /* Check access violations */
 978                 target_read_u32(target, FLASH_CRIS, &flash_cris);
 979                 if (flash_cris & (AMASK)) {
 980                         LOG_WARNING("Error setting flash page protection,  flash_cris 0x%" PRIx32 "", flash_cris);
 981                         target_write_u32(target, FLASH_CRIS, 0);
 982                         return ERROR_FLASH_OPERATION_FAILED;
 983                 }
 984
 985                 fmppe_addr += 4;
 986         }
 987
 988         return ERROR_OK;
 989 }
 990
 991 /* see contrib/loaders/flash/stellaris.s for src */
 992
 993 static const uint8_t stellaris_write_code[] = {
 994                                                                 /* write: */
 995         0xDF, 0xF8, 0x40, 0x40,         /* ldr          r4, pFLASH_CTRL_BASE */
 996         0xDF, 0xF8, 0x40, 0x50,         /* ldr          r5, FLASHWRITECMD */
 997                                                                 /* wait_fifo: */
 998         0xD0, 0xF8, 0x00, 0x80,         /* ldr          r8, [r0, #0] */
 999         0xB8, 0xF1, 0x00, 0x0F,         /* cmp          r8, #0 */
1000         0x17, 0xD0,                                     /* beq          exit */
1001         0x47, 0x68,                                     /* ldr          r7, [r0, #4] */
1002         0x47, 0x45,                                     /* cmp          r7, r8 */
1003         0xF7, 0xD0,                                     /* beq          wait_fifo */
1004                                                                 /* mainloop: */
1005         0x22, 0x60,                                     /* str          r2, [r4, #0] */
1006         0x02, 0xF1, 0x04, 0x02,         /* add          r2, r2, #4 */
1007         0x57, 0xF8, 0x04, 0x8B,         /* ldr          r8, [r7], #4 */
1008         0xC4, 0xF8, 0x04, 0x80,         /* str          r8, [r4, #4] */
1009         0xA5, 0x60,                                     /* str          r5, [r4, #8] */
1010                                                                 /* busy: */
1011         0xD4, 0xF8, 0x08, 0x80,         /* ldr          r8, [r4, #8] */
1012         0x18, 0xF0, 0x01, 0x0F,         /* tst          r8, #1 */
1013         0xFA, 0xD1,                                     /* bne          busy */
1014         0x8F, 0x42,                                     /* cmp          r7, r1 */
1015         0x28, 0xBF,                                     /* it           cs */
1016         0x00, 0xF1, 0x08, 0x07,         /* addcs        r7, r0, #8 */
1017         0x47, 0x60,                                     /* str          r7, [r0, #4] */
1018         0x01, 0x3B,                                     /* subs         r3, r3, #1 */
1019         0x03, 0xB1,                                     /* cbz          r3, exit */
1020         0xE2, 0xE7,                                     /* b            wait_fifo */
1021                                                                 /* exit: */
1022         0x00, 0xBE,                                     /* bkpt         #0 */
1023
1024         /* pFLASH_CTRL_BASE: */
1025         0x00, 0xD0, 0x0F, 0x40, /* .word        0x400FD000 */
1026         /* FLASHWRITECMD: */
1027         0x01, 0x00, 0x42, 0xA4  /* .word        0xA4420001 */
1028 };
1029 static int stellaris_write_block(struct flash_bank *bank,
1030                 const uint8_t *buffer, uint32_t offset, uint32_t wcount)
1031 {
1032         struct target *target = bank->target;
1033         uint32_t buffer_size = 16384;
1034         struct working_area *source;
1035         struct working_area *write_algorithm;
1036         uint32_t address = bank->base + offset;
1037         struct reg_param reg_params[4];
1038         struct armv7m_algorithm armv7m_info;
1039         int retval = ERROR_OK;
1040
1041         /* power of two, and multiple of word size */
1042         static const unsigned buf_min = 128;
1043
1044         /* for small buffers it's faster not to download an algorithm */
1045         if (wcount * 4 < buf_min)
1046                 return ERROR_TARGET_RESOURCE_NOT_AVAILABLE;
1047
1048         LOG_DEBUG("(bank=%p buffer=%p offset=%08" PRIx32 " wcount=%08" PRIx32 "",
1049                         bank, buffer, offset, wcount);
1050
1051         /* flash write code */
1052         if (target_alloc_working_area(target, sizeof(stellaris_write_code),
1053                         &write_algorithm) != ERROR_OK) {
1054                 LOG_DEBUG("no working area for block memory writes");
1055                 return ERROR_TARGET_RESOURCE_NOT_AVAILABLE;
1056         }
1057
1058         /* plus a buffer big enough for this data */
1059         if (wcount * 4 < buffer_size)
1060                 buffer_size = wcount * 4;
1061
1062         /* memory buffer */
1063         while (target_alloc_working_area_try(target, buffer_size, &source) != ERROR_OK) {
1064                 buffer_size /= 2;
1065                 if (buffer_size <= buf_min) {
1066                         target_free_working_area(target, write_algorithm);
1067                         return ERROR_TARGET_RESOURCE_NOT_AVAILABLE;
1068                 }
1069                 LOG_DEBUG("retry target_alloc_working_area(%s, size=%u)",
1070                                 target_name(target), (unsigned) buffer_size);
1071         }
1072
1073         target_write_buffer(target, write_algorithm->address,
1074                         sizeof(stellaris_write_code),
1075                         stellaris_write_code);
1076
1077         armv7m_info.common_magic = ARMV7M_COMMON_MAGIC;
1078         armv7m_info.core_mode = ARM_MODE_THREAD;
1079
1080         init_reg_param(&reg_params[0], "r0", 32, PARAM_OUT);
1081         init_reg_param(&reg_params[1], "r1", 32, PARAM_OUT);
1082         init_reg_param(&reg_params[2], "r2", 32, PARAM_OUT);
1083         init_reg_param(&reg_params[3], "r3", 32, PARAM_OUT);
1084
1085         buf_set_u32(reg_params[0].value, 0, 32, source->address);
1086         buf_set_u32(reg_params[1].value, 0, 32, source->address + source->size);
1087         buf_set_u32(reg_params[2].value, 0, 32, address);
1088         buf_set_u32(reg_params[3].value, 0, 32, wcount);
1089
1090         retval = target_run_flash_async_algorithm(target, buffer, wcount, 4,
1091                         0, NULL,
1092                         4, reg_params,
1093                         source->address, source->size,
1094                         write_algorithm->address, 0,
1095                         &armv7m_info);
1096
1097         if (retval == ERROR_FLASH_OPERATION_FAILED)
1098                 LOG_ERROR("error %d executing stellaris flash write algorithm", retval);
1099
1100         target_free_working_area(target, write_algorithm);
1101         target_free_working_area(target, source);
1102
1103         destroy_reg_param(&reg_params[0]);
1104         destroy_reg_param(&reg_params[1]);
1105         destroy_reg_param(&reg_params[2]);
1106         destroy_reg_param(&reg_params[3]);
1107
1108         return retval;
1109 }
1110
1111 static int stellaris_write(struct flash_bank *bank, const uint8_t *buffer,
1112                 uint32_t offset, uint32_t count)
1113 {
1114         struct stellaris_flash_bank *stellaris_info = bank->driver_priv;
1115         struct target *target = bank->target;
1116         uint32_t address = offset;
1117         uint32_t flash_cris, flash_fmc;
1118         uint32_t words_remaining = (count / 4);
1119         uint32_t bytes_remaining = (count & 0x00000003);
1120         uint32_t bytes_written = 0;
1121         int retval;
1122
1123         if (bank->target->state != TARGET_HALTED) {
1124                 LOG_ERROR("Target not halted");
1125                 return ERROR_TARGET_NOT_HALTED;
1126         }
1127
1128         LOG_DEBUG("(bank=%p buffer=%p offset=%08" PRIx32 " count=%08" PRIx32 "",
1129                         bank, buffer, offset, count);
1130
1131         if (stellaris_info->did1 == 0)
1132                 return ERROR_FLASH_BANK_NOT_PROBED;
1133
1134         if (offset & 0x3) {
1135                 LOG_WARNING("offset size must be word aligned");
1136                 return ERROR_FLASH_DST_BREAKS_ALIGNMENT;
1137         }
1138
1139         if (offset + count > bank->size)
1140                 return ERROR_FLASH_DST_OUT_OF_BANK;
1141
1142         /* Refresh flash controller timing */
1143         stellaris_read_clock_info(bank);
1144         stellaris_set_flash_timing(bank);
1145
1146         /* Clear and disable flash programming interrupts */
1147         target_write_u32(target, FLASH_CIM, 0);
1148         target_write_u32(target, FLASH_MISC, PMISC | AMISC);
1149
1150         /* REVISIT this clobbers state set by any halted firmware ...
1151          * it might want to process those IRQs.
1152          */
1153
1154         /* multiple words to be programmed? */
1155         if (words_remaining > 0) {
1156                 /* try using a block write */
1157                 retval = stellaris_write_block(bank, buffer, offset,
1158                                 words_remaining);
1159                 if (retval != ERROR_OK) {
1160                         if (retval == ERROR_TARGET_RESOURCE_NOT_AVAILABLE) {
1161                                 LOG_DEBUG("writing flash word-at-a-time");
1162                         } else if (retval == ERROR_FLASH_OPERATION_FAILED) {
1163                                 /* if an error occurred, we examine the reason, and quit */
1164                                 target_read_u32(target, FLASH_CRIS, &flash_cris);
1165
1166                                 LOG_ERROR("flash writing failed with CRIS: 0x%" PRIx32 "", flash_cris);
1167                                 return ERROR_FLASH_OPERATION_FAILED;
1168                         }
1169                 } else {
1170                         buffer += words_remaining * 4;
1171                         address += words_remaining * 4;
1172                         words_remaining = 0;
1173                 }
1174         }
1175
1176         while (words_remaining > 0) {
1177                 if (!(address & 0xff))
1178                         LOG_DEBUG("0x%" PRIx32 "", address);
1179
1180                 /* Program one word */
1181                 target_write_u32(target, FLASH_FMA, address);
1182                 target_write_buffer(target, FLASH_FMD, 4, buffer);
1183                 target_write_u32(target, FLASH_FMC, FMC_WRKEY | FMC_WRITE);
1184                 /* LOG_DEBUG("0x%x 0x%x 0x%x",address,buf_get_u32(buffer, 0, 32),FMC_WRKEY | FMC_WRITE); */
1185                 /* Wait until write complete */
1186                 do {
1187                         target_read_u32(target, FLASH_FMC, &flash_fmc);
1188                 } while (flash_fmc & FMC_WRITE);
1189
1190                 buffer += 4;
1191                 address += 4;
1192                 words_remaining--;
1193         }
1194
1195         if (bytes_remaining) {
1196                 uint8_t last_word[4] = {0xff, 0xff, 0xff, 0xff};
1197
1198                 /* copy the last remaining bytes into the write buffer */
1199                 memcpy(last_word, buffer+bytes_written, bytes_remaining);
1200
1201                 if (!(address & 0xff))
1202                         LOG_DEBUG("0x%" PRIx32 "", address);
1203
1204                 /* Program one word */
1205                 target_write_u32(target, FLASH_FMA, address);
1206                 target_write_buffer(target, FLASH_FMD, 4, last_word);
1207                 target_write_u32(target, FLASH_FMC, FMC_WRKEY | FMC_WRITE);
1208                 /* LOG_DEBUG("0x%x 0x%x 0x%x",address,buf_get_u32(buffer, 0, 32),FMC_WRKEY | FMC_WRITE); */
1209                 /* Wait until write complete */
1210                 do {
1211                         target_read_u32(target, FLASH_FMC, &flash_fmc);
1212                 } while (flash_fmc & FMC_WRITE);
1213         }
1214
1215         /* Check access violations */
1216         target_read_u32(target, FLASH_CRIS, &flash_cris);
1217         if (flash_cris & (AMASK)) {
1218                 LOG_DEBUG("flash_cris 0x%" PRIx32 "", flash_cris);
1219                 return ERROR_FLASH_OPERATION_FAILED;
1220         }
1221         return ERROR_OK;
1222 }
1223
1224 static int stellaris_probe(struct flash_bank *bank)
1225 {
1226         struct stellaris_flash_bank *stellaris_info = bank->driver_priv;
1227         int retval;
1228
1229         /* If this is a stellaris chip, it has flash; probe() is just
1230          * to figure out how much is present.  Only do it once.
1231          */
1232         if (stellaris_info->did1 != 0)
1233                 return ERROR_OK;
1234
1235         /* stellaris_read_part_info() already handled error checking and
1236          * reporting.  Note that it doesn't write, so we don't care about
1237          * whether the target is halted or not.
1238          */
1239         retval = stellaris_read_part_info(bank);
1240         if (retval != ERROR_OK)
1241                 return retval;
1242
1243         free(bank->sectors);
1244
1245         /* provide this for the benefit of the NOR flash framework */
1246         bank->size = stellaris_info->num_pages * stellaris_info->pagesize;
1247         bank->num_sectors = stellaris_info->num_pages;
1248         bank->sectors = calloc(bank->num_sectors, sizeof(struct flash_sector));
1249         for (unsigned int i = 0; i < bank->num_sectors; i++) {
1250                 bank->sectors[i].offset = i * stellaris_info->pagesize;
1251                 bank->sectors[i].size = stellaris_info->pagesize;
1252                 bank->sectors[i].is_erased = -1;
1253                 bank->sectors[i].is_protected = -1;
1254         }
1255
1256         return retval;
1257 }
1258
1259 static int stellaris_mass_erase(struct flash_bank *bank)
1260 {
1261         struct target *target = NULL;
1262         struct stellaris_flash_bank *stellaris_info = NULL;
1263         uint32_t flash_fmc;
1264
1265         stellaris_info = bank->driver_priv;
1266         target = bank->target;
1267
1268         if (target->state != TARGET_HALTED) {
1269                 LOG_ERROR("Target not halted");
1270                 return ERROR_TARGET_NOT_HALTED;
1271         }
1272
1273         if (stellaris_info->did1 == 0)
1274                 return ERROR_FLASH_BANK_NOT_PROBED;
1275
1276         /* Refresh flash controller timing */
1277         stellaris_read_clock_info(bank);
1278         stellaris_set_flash_timing(bank);
1279
1280         /* Clear and disable flash programming interrupts */
1281         target_write_u32(target, FLASH_CIM, 0);
1282         target_write_u32(target, FLASH_MISC, PMISC | AMISC);
1283
1284         /* REVISIT this clobbers state set by any halted firmware ...
1285          * it might want to process those IRQs.
1286          */
1287
1288         target_write_u32(target, FLASH_FMA, 0);
1289         target_write_u32(target, FLASH_FMC, FMC_WRKEY | FMC_MERASE);
1290         /* Wait until erase complete */
1291         do {
1292                 target_read_u32(target, FLASH_FMC, &flash_fmc);
1293         } while (flash_fmc & FMC_MERASE);
1294
1295         /* if device has > 128k, then second erase cycle is needed
1296          * this is only valid for older devices, but will not hurt */
1297         if (stellaris_info->num_pages * stellaris_info->pagesize > 0x20000) {
1298                 target_write_u32(target, FLASH_FMA, 0x20000);
1299                 target_write_u32(target, FLASH_FMC, FMC_WRKEY | FMC_MERASE);
1300                 /* Wait until erase complete */
1301                 do {
1302                         target_read_u32(target, FLASH_FMC, &flash_fmc);
1303                 } while (flash_fmc & FMC_MERASE);
1304         }
1305
1306         return ERROR_OK;
1307 }
1308
1309 COMMAND_HANDLER(stellaris_handle_mass_erase_command)
1310 {
1311         if (CMD_ARGC < 1)
1312                 return ERROR_COMMAND_SYNTAX_ERROR;
1313
1314         struct flash_bank *bank;
1315         int retval = CALL_COMMAND_HANDLER(flash_command_get_bank, 0, &bank);
1316         if (retval != ERROR_OK)
1317                 return retval;
1318
1319         if (stellaris_mass_erase(bank) == ERROR_OK)
1320                 command_print(CMD, "stellaris mass erase complete");
1321         else
1322                 command_print(CMD, "stellaris mass erase failed");
1323
1324         return ERROR_OK;
1325 }
1326
1327 /**
1328  * Perform the Stellaris "Recovering a 'Locked' Device procedure.
1329  * This performs a mass erase and then restores all nonvolatile registers
1330  * (including USER_* registers and flash lock bits) to their defaults.
1331  * Accordingly, flash can be reprogrammed, and JTAG can be used.
1332  *
1333  * NOTE that DustDevil parts (at least rev A0 silicon) have errata which
1334  * can affect this operation if flash protection has been enabled.
1335  */
1336 COMMAND_HANDLER(stellaris_handle_recover_command)
1337 {
1338         struct flash_bank *bank;
1339         struct arm *arm;
1340         int retval;
1341
1342         if (CMD_ARGC != 0)
1343                 return ERROR_COMMAND_SYNTAX_ERROR;
1344
1345         bank = get_flash_bank_by_num_noprobe(0);
1346         if (!bank)
1347                 return ERROR_FAIL;
1348
1349         /* REVISIT ... it may be worth sanity checking that the AP is
1350          * inactive before we start.  ARM documents that switching a DP's
1351          * mode while it's active can cause fault modes that need a power
1352          * cycle to recover.
1353          */
1354
1355         Jim_Eval_Named(CMD_CTX->interp, "catch { hla_command \"debug unlock\" }", 0, 0);
1356         if (!strcmp(Jim_GetString(Jim_GetResult(CMD_CTX->interp), NULL), "0")) {
1357                 retval = ERROR_OK;
1358                 goto user_action;
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         adapter_assert_reset();
1367
1368         arm = target_to_arm(bank->target);
1369         for (int i = 0; i < 5; i++) {
1370                 retval = dap_to_swd(arm->dap);
1371                 if (retval != ERROR_OK)
1372                         goto done;
1373
1374                 retval = dap_to_jtag(arm->dap);
1375                 if (retval != ERROR_OK)
1376                         goto done;
1377         }
1378
1379         /* de-assert SRST */
1380         adapter_deassert_reset();
1381         retval = jtag_execute_queue();
1382
1383         /* wait 400+ msec ... OK, "1+ second" is simpler */
1384         usleep(1000);
1385
1386 user_action:
1387         /* USER INTERVENTION required for the power cycle
1388          * Restarting OpenOCD is likely needed because of mode switching.
1389          */
1390         LOG_INFO("USER ACTION:  "
1391                 "power cycle Stellaris chip, then restart OpenOCD.");
1392
1393 done:
1394         return retval;
1395 }
1396
1397 static const struct command_registration stellaris_exec_command_handlers[] = {
1398         {
1399                 .name = "mass_erase",
1400                 .usage = "<bank>",
1401                 .handler = stellaris_handle_mass_erase_command,
1402                 .mode = COMMAND_EXEC,
1403                 .help = "erase entire device",
1404         },
1405         {
1406                 .name = "recover",
1407                 .handler = stellaris_handle_recover_command,
1408                 .mode = COMMAND_EXEC,
1409                 .usage = "",
1410                 .help = "recover (and erase) locked device",
1411         },
1412         COMMAND_REGISTRATION_DONE
1413 };
1414 static const struct command_registration stellaris_command_handlers[] = {
1415         {
1416                 .name = "stellaris",
1417                 .mode = COMMAND_EXEC,
1418                 .help = "Stellaris flash command group",
1419                 .usage = "",
1420                 .chain = stellaris_exec_command_handlers,
1421         },
1422         COMMAND_REGISTRATION_DONE
1423 };
1424
1425 const struct flash_driver stellaris_flash = {
1426         .name = "stellaris",
1427         .commands = stellaris_command_handlers,
1428         .flash_bank_command = stellaris_flash_bank_command,
1429         .erase = stellaris_erase,
1430         .protect = stellaris_protect,
1431         .write = stellaris_write,
1432         .read = default_flash_read,
1433         .probe = stellaris_probe,
1434         .auto_probe = stellaris_probe,
1435         .erase_check = default_flash_blank_check,
1436         .protect_check = stellaris_protect_check,
1437         .info = get_stellaris_info,
1438         .free_driver_priv = default_flash_free_driver_priv,
1439 };