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   1 /***************************************************************************
   2  *   Copyright (C) 2008 by                                                             *
   3  *   Karl RobinSod <karl.robinsod@gmail.com>                               *
   4  *                                                                         *
   5  *   This program is free software; you can redistribute it and/or modify  *
   6  *   it under the terms of the GNU General Public License as published by  *
   7  *   the Free Software Foundation; either version 2 of the License, or     *
   8  *   (at your option) any later version.                                   *
   9  *                                                                         *
  10  *   This program is distributed in the hope that it will be useful,       *
  11  *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
  12  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
  13  *   GNU General Public License for more details.                          *
  14  *                                                                         *
  15  *   You should have received a copy of the GNU General Public License     *
  16  *   along with this program; if not, write to the                         *
  17  *   Free Software Foundation, Inc.,                                       *
  18  *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             *
  19  ***************************************************************************/
  20
  21 /***************************************************************************
  22 * There are some things to notice
  23 *
  24 * You need to unprotect flash sectors each time you connect the OpenOCD
  25 * Dumping 1MB takes about 60 Seconds
  26 * Full erase (sectors 0-22 inclusive) takes 2-4 seconds
  27 * Writing 1MB takes 88 seconds
  28 *
  29  ***************************************************************************/
  30 #ifdef HAVE_CONFIG_H
  31 #include "config.h"
  32 #endif
  33
  34 #include "imp.h"
  35 #include <helper/binarybuffer.h>
  36
  37
  38 #define LOAD_TIMER_ERASE        0
  39 #define LOAD_TIMER_WRITE        1
  40
  41 #define FLASH_PAGE_SIZE         512
  42
  43 /* LPC288X control registers */
  44 #define DBGU_CIDR               0x8000507C
  45 /* LPC288X flash registers */
  46 #define F_CTRL                  0x80102000      /* Flash control register R/W 0x5 */
  47 #define F_STAT                  0x80102004      /* Flash status register RO 0x45 */
  48 #define F_PROG_TIME             0x80102008      /* Flash program time register R/W 0 */
  49 #define F_WAIT                  0x80102010      /* Flash read wait state register R/W 0xC004 */
  50 #define F_CLK_TIME              0x8010201C      /* Flash clock divider for 66 kHz generation R/W 0 */
  51 #define F_INTEN_CLR             0x80102FD8      /* Clear interrupt enable bits WO - */
  52 #define F_INTEN_SET             0x80102FDC      /* Set interrupt enable bits WO - */
  53 #define F_INT_STAT              0x80102FE0      /* Interrupt status bits RO 0 */
  54 #define F_INTEN                 0x80102FE4      /* Interrupt enable bits RO 0 */
  55 #define F_INT_CLR               0x80102FE8      /* Clear interrupt status bits WO */
  56 #define F_INT_SET               0x80102FEC      /* Set interrupt status bits WO - */
  57 #define FLASH_PD                0x80005030      /* Allows turning off the Flash memory for power savings. R/W 1*/
  58 #define FLASH_INIT              0x80005034      /* Monitors Flash readiness, such as recovery from Power Down mode. R/W -*/
  59
  60 /* F_CTRL bits */
  61 #define FC_CS                   0x0001
  62 #define FC_FUNC                 0x0002
  63 #define FC_WEN                  0x0004
  64 #define FC_RD_LATCH             0x0020
  65 #define FC_PROTECT              0x0080
  66 #define FC_SET_DATA             0x0400
  67 #define FC_RSSL                 0x0800
  68 #define FC_PROG_REQ             0x1000
  69 #define FC_CLR_BUF              0x4000
  70 #define FC_LOAD_REQ             0x8000
  71 /* F_STAT bits */
  72 #define FS_DONE                 0x0001
  73 #define FS_PROGGNT              0x0002
  74 #define FS_RDY                  0x0004
  75 #define FS_ERR                  0x0020
  76 /* F_PROG_TIME */
  77 #define FPT_TIME_MASK   0x7FFF
  78
  79 #define FPT_ENABLE              0x8000
  80 /* F_WAIT */
  81 #define FW_WAIT_STATES_MASK             0x00FF
  82 #define FW_SET_MASK                             0xC000
  83
  84 /* F_CLK_TIME */
  85 #define FCT_CLK_DIV_MASK    0x0FFF
  86
  87 struct lpc288x_flash_bank
  88 {
  89         uint32_t working_area;
  90         uint32_t working_area_size;
  91
  92         /* chip id register */
  93         uint32_t cidr;
  94         const char * target_name;
  95         uint32_t cclk;
  96
  97         uint32_t sector_size_break;
  98 };
  99
 100 static uint32_t lpc288x_wait_status_busy(struct flash_bank *bank, int timeout);
 101 static void lpc288x_load_timer(int erase, struct target *target);
 102 static void lpc288x_set_flash_clk(struct flash_bank *bank);
 103 static uint32_t lpc288x_system_ready(struct flash_bank *bank);
 104
 105 static uint32_t lpc288x_wait_status_busy(struct flash_bank *bank, int timeout)
 106 {
 107         uint32_t status;
 108         struct target *target = bank->target;
 109         do
 110         {
 111                 alive_sleep(1);
 112                 timeout--;
 113                 target_read_u32(target, F_STAT, &status);
 114         } while (((status & FS_DONE) == 0) && timeout);
 115
 116         if (timeout == 0)
 117         {
 118                 LOG_DEBUG("Timedout!");
 119                 return ERROR_FLASH_OPERATION_FAILED;
 120         }
 121         return ERROR_OK;
 122 }
 123
 124 /* Read device id register and fill in driver info structure */
 125 static int lpc288x_read_part_info(struct flash_bank *bank)
 126 {
 127         struct lpc288x_flash_bank *lpc288x_info = bank->driver_priv;
 128         struct target *target = bank->target;
 129         uint32_t cidr;
 130
 131         int i = 0;
 132         uint32_t offset;
 133
 134         if (lpc288x_info->cidr == 0x0102100A)
 135                 return ERROR_OK; /* already probed, multiple probes may cause memory leak, not allowed */
 136
 137         /* Read and parse chip identification register */
 138         target_read_u32(target, DBGU_CIDR, &cidr);
 139
 140         if (cidr != 0x0102100A)
 141         {
 142                 LOG_WARNING("Cannot identify target as an LPC288X (%08" PRIx32 ")",cidr);
 143                 return ERROR_FLASH_OPERATION_FAILED;
 144         }
 145
 146         lpc288x_info->cidr = cidr;
 147         lpc288x_info->sector_size_break = 0x000F0000;
 148         lpc288x_info->target_name = "LPC288x";
 149
 150         /* setup the sector info... */
 151         offset = bank->base;
 152         bank->num_sectors = 23;
 153         bank->sectors = malloc(sizeof(struct flash_sector) * 23);
 154
 155         for (i = 0; i < 15; i++)
 156         {
 157                 bank->sectors[i].offset = offset;
 158                 bank->sectors[i].size = 64 * 1024;
 159                 offset += bank->sectors[i].size;
 160                 bank->sectors[i].is_erased = -1;
 161                 bank->sectors[i].is_protected = 1;
 162         }
 163         for (i = 15; i < 23; i++)
 164         {
 165                 bank->sectors[i].offset = offset;
 166                 bank->sectors[i].size = 8 * 1024;
 167                 offset += bank->sectors[i].size;
 168                 bank->sectors[i].is_erased = -1;
 169                 bank->sectors[i].is_protected = 1;
 170         }
 171
 172         return ERROR_OK;
 173 }
 174
 175 static int lpc288x_protect_check(struct flash_bank *bank)
 176 {
 177         return ERROR_OK;
 178 }
 179
 180 /* flash_bank LPC288x 0 0 0 0 <target#> <cclk> */
 181 FLASH_BANK_COMMAND_HANDLER(lpc288x_flash_bank_command)
 182 {
 183         struct lpc288x_flash_bank *lpc288x_info;
 184
 185         if (CMD_ARGC < 6)
 186         {
 187                 return ERROR_COMMAND_SYNTAX_ERROR;
 188         }
 189
 190         lpc288x_info = malloc(sizeof(struct lpc288x_flash_bank));
 191         bank->driver_priv = lpc288x_info;
 192
 193         /* part wasn't probed for info yet */
 194         lpc288x_info->cidr = 0;
 195         COMMAND_PARSE_NUMBER(u32, CMD_ARGV[6], lpc288x_info->cclk);
 196
 197         return ERROR_OK;
 198 }
 199
 200 /* The frequency is the AHB clock frequency divided by (CLK_DIV ×3) + 1.
 201  * This must be programmed such that the Flash Programming clock frequency is 66 kHz ± 20%.
 202  * AHB = 12 MHz ?
 203  * 12000000/66000 = 182
 204  * CLK_DIV = 60 ? */
 205 static void lpc288x_set_flash_clk(struct flash_bank *bank)
 206 {
 207         uint32_t clk_time;
 208         struct lpc288x_flash_bank *lpc288x_info = bank->driver_priv;
 209         clk_time = (lpc288x_info->cclk / 66000) / 3;
 210         target_write_u32(bank->target, F_CTRL, FC_CS | FC_WEN);
 211         target_write_u32(bank->target, F_CLK_TIME, clk_time);
 212 }
 213
 214 /* AHB tcyc (in ns) 83 ns
 215  * LOAD_TIMER_ERASE             FPT_TIME        = ((400,000,000 / AHB tcyc (in ns)) - 2) / 512
 216  *                                                                      = 9412 (9500) (AN10548 9375)
 217  * LOAD_TIMER_WRITE             FPT_TIME        = ((1,000,000 / AHB tcyc (in ns)) - 2) / 512
 218  *                                                                      = 23 (75) (AN10548 72 - is this wrong?)
 219  * TODO: Sort out timing calcs ;) */
 220 static void lpc288x_load_timer(int erase, struct target *target)
 221 {
 222         if (erase == LOAD_TIMER_ERASE)
 223         {
 224                 target_write_u32(target, F_PROG_TIME, FPT_ENABLE | 9500);
 225         }
 226         else
 227         {
 228                 target_write_u32(target, F_PROG_TIME, FPT_ENABLE | 75);
 229         }
 230 }
 231
 232 static uint32_t lpc288x_system_ready(struct flash_bank *bank)
 233 {
 234         struct lpc288x_flash_bank *lpc288x_info = bank->driver_priv;
 235         if (lpc288x_info->cidr == 0)
 236         {
 237                 return ERROR_FLASH_BANK_NOT_PROBED;
 238         }
 239
 240         if (bank->target->state != TARGET_HALTED)
 241         {
 242                 LOG_ERROR("Target not halted");
 243                 return ERROR_TARGET_NOT_HALTED;
 244         }
 245         return ERROR_OK;
 246 }
 247
 248 static int lpc288x_erase_check(struct flash_bank *bank)
 249 {
 250         uint32_t status = lpc288x_system_ready(bank);   /* probed? halted? */
 251         if (status != ERROR_OK)
 252         {
 253                 LOG_INFO("Processor not halted/not probed");
 254                 return status;
 255         }
 256
 257         return ERROR_OK;
 258 }
 259
 260 static int lpc288x_erase(struct flash_bank *bank, int first, int last)
 261 {
 262         uint32_t status;
 263         int sector;
 264         struct target *target = bank->target;
 265
 266         status = lpc288x_system_ready(bank);    /* probed? halted? */
 267         if (status != ERROR_OK)
 268         {
 269                 return status;
 270         }
 271
 272         if ((first < 0) || (last < first) || (last >= bank->num_sectors))
 273         {
 274                 LOG_INFO("Bad sector range");
 275                 return ERROR_FLASH_SECTOR_INVALID;
 276         }
 277
 278         /* Configure the flash controller timing */
 279         lpc288x_set_flash_clk(bank);
 280
 281         for (sector = first; sector <= last; sector++)
 282         {
 283                 if (lpc288x_wait_status_busy(bank, 1000) != ERROR_OK)
 284                 {
 285                         return ERROR_FLASH_OPERATION_FAILED;
 286                 }
 287
 288                 lpc288x_load_timer(LOAD_TIMER_ERASE,target);
 289
 290                 target_write_u32(target, bank->sectors[sector].offset, 0x00);
 291
 292                 target_write_u32(target, F_CTRL, FC_PROG_REQ | FC_PROTECT | FC_CS);
 293         }
 294         if (lpc288x_wait_status_busy(bank, 1000) != ERROR_OK)
 295         {
 296                 return ERROR_FLASH_OPERATION_FAILED;
 297         }
 298         return ERROR_OK;
 299 }
 300
 301 static int lpc288x_write(struct flash_bank *bank, uint8_t *buffer, uint32_t offset, uint32_t count)
 302 {
 303         uint8_t page_buffer[FLASH_PAGE_SIZE];
 304         uint32_t status, source_offset,dest_offset;
 305         struct target *target = bank->target;
 306         uint32_t bytes_remaining = count;
 307         uint32_t first_sector, last_sector, sector, page;
 308         int i;
 309
 310         /* probed? halted? */
 311         status = lpc288x_system_ready(bank);
 312         if (status != ERROR_OK)
 313         {
 314                 return status;
 315         }
 316
 317         /* Initialise search indices */
 318         first_sector = last_sector = 0xffffffff;
 319
 320         /* validate the write range... */
 321         for (i = 0; i < bank->num_sectors; i++)
 322         {
 323                 if ((offset >= bank->sectors[i].offset) &&
 324                         (offset < (bank->sectors[i].offset + bank->sectors[i].size)) &&
 325                         (first_sector == 0xffffffff))
 326                 {
 327                         first_sector = i;
 328                         /* all writes must start on a sector boundary... */
 329                         if (offset % bank->sectors[i].size)
 330                         {
 331                                 LOG_INFO("offset 0x%" PRIx32 " breaks required alignment 0x%" PRIx32 "", offset, bank->sectors[i].size);
 332                                 return ERROR_FLASH_DST_BREAKS_ALIGNMENT;
 333                         }
 334                 }
 335                 if (((offset + count) > bank->sectors[i].offset) &&
 336                         ((offset + count) <= (bank->sectors[i].offset + bank->sectors[i].size)) &&
 337                         (last_sector == 0xffffffff))
 338                 {
 339                         last_sector = i;
 340                 }
 341         }
 342
 343         /* Range check... */
 344         if (first_sector == 0xffffffff || last_sector == 0xffffffff)
 345         {
 346                 LOG_INFO("Range check failed %" PRIx32 " %" PRIx32 "", offset, count);
 347                 return ERROR_FLASH_DST_OUT_OF_BANK;
 348         }
 349
 350         /* Configure the flash controller timing */
 351         lpc288x_set_flash_clk(bank);
 352
 353         /* initialise the offsets */
 354         source_offset = 0;
 355         dest_offset = 0;
 356
 357         for (sector = first_sector; sector <= last_sector; sector++)
 358         {
 359                 for (page = 0; page < bank->sectors[sector].size / FLASH_PAGE_SIZE; page++)
 360                 {
 361                         if (bytes_remaining == 0)
 362                         {
 363                                 count = 0;
 364                                 memset(page_buffer, 0xFF, FLASH_PAGE_SIZE);
 365                         }
 366                         else if (bytes_remaining < FLASH_PAGE_SIZE)
 367                         {
 368                                 count = bytes_remaining;
 369                                 memset(page_buffer, 0xFF, FLASH_PAGE_SIZE);
 370                                 memcpy(page_buffer, &buffer[source_offset], count);
 371                         }
 372                         else
 373                         {
 374                                 count = FLASH_PAGE_SIZE;
 375                                 memcpy(page_buffer, &buffer[source_offset], count);
 376                         }
 377
 378                         /* Wait for flash to become ready */
 379                         if (lpc288x_wait_status_busy(bank, 1000) != ERROR_OK)
 380                         {
 381                                 return ERROR_FLASH_OPERATION_FAILED;
 382                         }
 383
 384                         /* fill flash data latches with 1's */
 385                         target_write_u32(target, F_CTRL, FC_CS | FC_SET_DATA | FC_WEN | FC_FUNC);
 386
 387                         target_write_u32(target, F_CTRL, FC_CS | FC_WEN | FC_FUNC);
 388                         /*would be better to use the clean target_write_buffer() interface but
 389                          * it seems not to be a LOT slower....
 390                          * bulk_write_memory() is no quicker :(*/
 391 #if 1
 392                         if (target_write_memory(target, offset + dest_offset, 4, 128, page_buffer) != ERROR_OK)
 393                         {
 394                                 LOG_ERROR("Write failed s %" PRIx32 " p %" PRIx32 "", sector, page);
 395                                 return ERROR_FLASH_OPERATION_FAILED;
 396                         }
 397 #else
 398                         if (target_write_buffer(target, offset + dest_offset, FLASH_PAGE_SIZE, page_buffer) != ERROR_OK)
 399                         {
 400                                 LOG_INFO("Write to flash buffer failed");
 401                                 return ERROR_FLASH_OPERATION_FAILED;
 402                         }
 403 #endif
 404                         dest_offset += FLASH_PAGE_SIZE;
 405                         source_offset += count;
 406                         bytes_remaining -= count;
 407
 408                         lpc288x_load_timer(LOAD_TIMER_WRITE, target);
 409
 410                         target_write_u32(target, F_CTRL, FC_PROG_REQ | FC_PROTECT | FC_FUNC | FC_CS);
 411                 }
 412         }
 413
 414         return ERROR_OK;
 415 }
 416
 417 static int lpc288x_probe(struct flash_bank *bank)
 418 {
 419         /* we only deal with LPC2888 so flash config is fixed */
 420         struct lpc288x_flash_bank *lpc288x_info = bank->driver_priv;
 421         int retval;
 422
 423         if (lpc288x_info->cidr != 0)
 424         {
 425                 return ERROR_OK; /* already probed */
 426         }
 427
 428         if (bank->target->state != TARGET_HALTED)
 429         {
 430                 LOG_ERROR("Target not halted");
 431                 return ERROR_TARGET_NOT_HALTED;
 432         }
 433
 434         retval = lpc288x_read_part_info(bank);
 435         if (retval != ERROR_OK)
 436                 return retval;
 437         return ERROR_OK;
 438 }
 439
 440 static int lpc288x_info(struct flash_bank *bank, char *buf, int buf_size)
 441 {
 442         snprintf(buf, buf_size, "lpc288x flash driver");
 443         return ERROR_OK;
 444 }
 445
 446 static int lpc288x_protect(struct flash_bank *bank, int set, int first, int last)
 447 {
 448         int lockregion, status;
 449         uint32_t value;
 450         struct target *target = bank->target;
 451
 452         /* probed? halted? */
 453         status = lpc288x_system_ready(bank);
 454         if (status != ERROR_OK)
 455         {
 456                 return status;
 457         }
 458
 459         if ((first < 0) || (last < first) || (last >= bank->num_sectors))
 460         {
 461                 return ERROR_FLASH_SECTOR_INVALID;
 462         }
 463
 464         /* Configure the flash controller timing */
 465         lpc288x_set_flash_clk(bank);
 466
 467         for (lockregion = first; lockregion <= last; lockregion++)
 468         {
 469                 if (set)
 470                 {
 471                         /* write an odd value to base addy to protect... */
 472                         value = 0x01;
 473                 }
 474                 else
 475                 {
 476                         /* write an even value to base addy to unprotect... */
 477                         value = 0x00;
 478                 }
 479                 target_write_u32(target, bank->sectors[lockregion].offset, value);
 480                 target_write_u32(target, F_CTRL, FC_LOAD_REQ | FC_PROTECT | FC_WEN | FC_FUNC | FC_CS);
 481         }
 482
 483         return ERROR_OK;
 484 }
 485
 486 struct flash_driver lpc288x_flash = {
 487         .name = "lpc288x",
 488         .flash_bank_command = lpc288x_flash_bank_command,
 489         .erase = lpc288x_erase,
 490         .protect = lpc288x_protect,
 491         .write = lpc288x_write,
 492         .read = default_flash_read,
 493         .probe = lpc288x_probe,
 494         .auto_probe = lpc288x_probe,
 495         .erase_check = lpc288x_erase_check,
 496         .protect_check = lpc288x_protect_check,
 497         .info = lpc288x_info,
 498 };