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   1 /***************************************************************************
   2  *   Copyright (C) 2017 by Texas Instruments, Inc.                         *
   3  *                                                                         *
   4  *   This program is free software; you can redistribute it and/or modify  *
   5  *   it under the terms of the GNU General Public License as published by  *
   6  *   the Free Software Foundation; either version 2 of the License, or     *
   7  *   (at your option) any later version.                                   *
   8  *                                                                         *
   9  *   This program is distributed in the hope that it will be useful,       *
  10  *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
  11  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
  12  *   GNU General Public License for more details.                          *
  13  *                                                                         *
  14  *   You should have received a copy of the GNU General Public License     *
  15  *   along with this program.  If not, see <http://www.gnu.org/licenses/>. *
  16  ***************************************************************************/
  17
  18 #ifdef HAVE_CONFIG_H
  19 #include "config.h"
  20 #endif
  21
  22 #include "imp.h"
  23 #include "cc26xx.h"
  24 #include <helper/binarybuffer.h>
  25 #include <helper/time_support.h>
  26 #include <target/algorithm.h>
  27 #include <target/armv7m.h>
  28 #include <target/image.h>
  29
  30 #define FLASH_TIMEOUT 8000
  31
  32 struct cc26xx_bank {
  33         const char *family_name;
  34         uint32_t icepick_id;
  35         uint32_t user_id;
  36         uint32_t device_type;
  37         uint32_t sector_length;
  38         bool probed;
  39         struct working_area *working_area;
  40         struct armv7m_algorithm armv7m_info;
  41         const uint8_t *algo_code;
  42         uint32_t algo_size;
  43         uint32_t algo_working_size;
  44         uint32_t buffer_addr[2];
  45         uint32_t params_addr[2];
  46 };
  47
  48 static int cc26xx_auto_probe(struct flash_bank *bank);
  49
  50 static uint32_t cc26xx_device_type(uint32_t icepick_id, uint32_t user_id)
  51 {
  52         uint32_t device_type = 0;
  53
  54         switch (icepick_id & ICEPICK_ID_MASK) {
  55                 case CC26X0_ICEPICK_ID:
  56                         device_type = CC26X0_TYPE;
  57                         break;
  58                 case CC26X1_ICEPICK_ID:
  59                         device_type = CC26X1_TYPE;
  60                         break;
  61                 case CC13X0_ICEPICK_ID:
  62                         device_type = CC13X0_TYPE;
  63                         break;
  64                 case CC13X2_CC26X2_ICEPICK_ID:
  65                 default:
  66                         if ((user_id & USER_ID_CC13_MASK) != 0)
  67                                 device_type = CC13X2_TYPE;
  68                         else
  69                                 device_type = CC26X2_TYPE;
  70                         break;
  71         }
  72
  73         return device_type;
  74 }
  75
  76 static uint32_t cc26xx_sector_length(uint32_t icepick_id)
  77 {
  78         uint32_t sector_length;
  79
  80         switch (icepick_id & ICEPICK_ID_MASK) {
  81                 case CC26X0_ICEPICK_ID:
  82                 case CC26X1_ICEPICK_ID:
  83                 case CC13X0_ICEPICK_ID:
  84                         /* Chameleon family device */
  85                         sector_length = CC26X0_SECTOR_LENGTH;
  86                         break;
  87                 case CC13X2_CC26X2_ICEPICK_ID:
  88                 default:
  89                         /* Agama family device */
  90                         sector_length = CC26X2_SECTOR_LENGTH;
  91                         break;
  92         }
  93
  94         return sector_length;
  95 }
  96
  97 static int cc26xx_wait_algo_done(struct flash_bank *bank, uint32_t params_addr)
  98 {
  99         struct target *target = bank->target;
 100         struct cc26xx_bank *cc26xx_bank = bank->driver_priv;
 101
 102         uint32_t status_addr = params_addr + CC26XX_STATUS_OFFSET;
 103         uint32_t status = CC26XX_BUFFER_FULL;
 104         long long start_ms;
 105         long long elapsed_ms;
 106
 107         int retval = ERROR_OK;
 108
 109         start_ms = timeval_ms();
 110         while (CC26XX_BUFFER_FULL == status) {
 111                 retval = target_read_u32(target, status_addr, &status);
 112                 if (ERROR_OK != retval)
 113                         return retval;
 114
 115                 elapsed_ms = timeval_ms() - start_ms;
 116                 if (elapsed_ms > 500)
 117                         keep_alive();
 118                 if (elapsed_ms > FLASH_TIMEOUT)
 119                         break;
 120         };
 121
 122         if (CC26XX_BUFFER_EMPTY != status) {
 123                 LOG_ERROR("%s: Flash operation failed", cc26xx_bank->family_name);
 124                 return ERROR_FAIL;
 125         }
 126
 127         return ERROR_OK;
 128 }
 129
 130 static int cc26xx_init(struct flash_bank *bank)
 131 {
 132         struct target *target = bank->target;
 133         struct cc26xx_bank *cc26xx_bank = bank->driver_priv;
 134
 135         int retval;
 136
 137         /* Make sure we've probed the flash to get the device and size */
 138         retval = cc26xx_auto_probe(bank);
 139         if (ERROR_OK != retval)
 140                 return retval;
 141
 142         /* Check for working area to use for flash helper algorithm */
 143         if (NULL != cc26xx_bank->working_area)
 144                 target_free_working_area(target, cc26xx_bank->working_area);
 145         retval = target_alloc_working_area(target, cc26xx_bank->algo_working_size,
 146                                 &cc26xx_bank->working_area);
 147         if (ERROR_OK != retval)
 148                 return retval;
 149
 150         /* Confirm the defined working address is the area we need to use */
 151         if (CC26XX_ALGO_BASE_ADDRESS != cc26xx_bank->working_area->address)
 152                 return ERROR_TARGET_RESOURCE_NOT_AVAILABLE;
 153
 154         /* Write flash helper algorithm into target memory */
 155         retval = target_write_buffer(target, CC26XX_ALGO_BASE_ADDRESS,
 156                                 cc26xx_bank->algo_size, cc26xx_bank->algo_code);
 157         if (ERROR_OK != retval) {
 158                 LOG_ERROR("%s: Failed to load flash helper algorithm",
 159                         cc26xx_bank->family_name);
 160                 target_free_working_area(target, cc26xx_bank->working_area);
 161                 return retval;
 162         }
 163
 164         /* Initialize the ARMv7 specific info to run the algorithm */
 165         cc26xx_bank->armv7m_info.common_magic = ARMV7M_COMMON_MAGIC;
 166         cc26xx_bank->armv7m_info.core_mode = ARM_MODE_THREAD;
 167
 168         /* Begin executing the flash helper algorithm */
 169         retval = target_start_algorithm(target, 0, NULL, 0, NULL,
 170                                 CC26XX_ALGO_BASE_ADDRESS, 0, &cc26xx_bank->armv7m_info);
 171         if (ERROR_OK != retval) {
 172                 LOG_ERROR("%s: Failed to start flash helper algorithm",
 173                         cc26xx_bank->family_name);
 174                 target_free_working_area(target, cc26xx_bank->working_area);
 175                 return retval;
 176         }
 177
 178         /*
 179          * At this point, the algorithm is running on the target and
 180          * ready to receive commands and data to flash the target
 181          */
 182
 183         return retval;
 184 }
 185
 186 static int cc26xx_quit(struct flash_bank *bank)
 187 {
 188         struct target *target = bank->target;
 189         struct cc26xx_bank *cc26xx_bank = bank->driver_priv;
 190
 191         int retval;
 192
 193         /* Regardless of the algo's status, attempt to halt the target */
 194         (void)target_halt(target);
 195
 196         /* Now confirm target halted and clean up from flash helper algorithm */
 197         retval = target_wait_algorithm(target, 0, NULL, 0, NULL, 0, FLASH_TIMEOUT,
 198                                 &cc26xx_bank->armv7m_info);
 199
 200         target_free_working_area(target, cc26xx_bank->working_area);
 201         cc26xx_bank->working_area = NULL;
 202
 203         return retval;
 204 }
 205
 206 static int cc26xx_mass_erase(struct flash_bank *bank)
 207 {
 208         struct target *target = bank->target;
 209         struct cc26xx_bank *cc26xx_bank = bank->driver_priv;
 210         struct cc26xx_algo_params algo_params;
 211
 212         int retval;
 213
 214         if (TARGET_HALTED != target->state) {
 215                 LOG_ERROR("Target not halted");
 216                 return ERROR_TARGET_NOT_HALTED;
 217         }
 218
 219         retval = cc26xx_init(bank);
 220         if (ERROR_OK != retval)
 221                 return retval;
 222
 223         /* Initialize algorithm parameters */
 224         buf_set_u32(algo_params.address, 0, 32, 0);
 225         buf_set_u32(algo_params.length,  0, 32, 4);
 226         buf_set_u32(algo_params.command, 0, 32, CC26XX_CMD_ERASE_ALL);
 227         buf_set_u32(algo_params.status,  0, 32, CC26XX_BUFFER_FULL);
 228
 229         /* Issue flash helper algorithm parameters for mass erase */
 230         retval = target_write_buffer(target, cc26xx_bank->params_addr[0],
 231                                 sizeof(algo_params), (uint8_t *)&algo_params);
 232
 233         /* Wait for command to complete */
 234         if (ERROR_OK == retval)
 235                 retval = cc26xx_wait_algo_done(bank, cc26xx_bank->params_addr[0]);
 236
 237         /* Regardless of errors, try to close down algo */
 238         (void)cc26xx_quit(bank);
 239
 240         return retval;
 241 }
 242
 243 FLASH_BANK_COMMAND_HANDLER(cc26xx_flash_bank_command)
 244 {
 245         struct cc26xx_bank *cc26xx_bank;
 246
 247         if (CMD_ARGC < 6)
 248                 return ERROR_COMMAND_SYNTAX_ERROR;
 249
 250         cc26xx_bank = malloc(sizeof(struct cc26xx_bank));
 251         if (NULL == cc26xx_bank)
 252                 return ERROR_FAIL;
 253
 254         /* Initialize private flash information */
 255         memset((void *)cc26xx_bank, 0x00, sizeof(struct cc26xx_bank));
 256         cc26xx_bank->family_name = "cc26xx";
 257         cc26xx_bank->device_type = CC26XX_NO_TYPE;
 258         cc26xx_bank->sector_length = 0x1000;
 259
 260         /* Finish initialization of bank */
 261         bank->driver_priv = cc26xx_bank;
 262         bank->next = NULL;
 263
 264         return ERROR_OK;
 265 }
 266
 267 static int cc26xx_erase(struct flash_bank *bank, int first, int last)
 268 {
 269         struct target *target = bank->target;
 270         struct cc26xx_bank *cc26xx_bank = bank->driver_priv;
 271         struct cc26xx_algo_params algo_params;
 272
 273         uint32_t address;
 274         uint32_t length;
 275         int retval;
 276
 277         if (TARGET_HALTED != target->state) {
 278                 LOG_ERROR("Target not halted");
 279                 return ERROR_TARGET_NOT_HALTED;
 280         }
 281
 282         /* Do a mass erase if user requested all sectors of flash */
 283         if ((first == 0) && (last == (bank->num_sectors - 1))) {
 284                 /* Request mass erase of flash */
 285                 return cc26xx_mass_erase(bank);
 286         }
 287
 288         address = first * cc26xx_bank->sector_length;
 289         length = (last - first + 1) * cc26xx_bank->sector_length;
 290
 291         retval = cc26xx_init(bank);
 292         if (ERROR_OK != retval)
 293                 return retval;
 294
 295         /* Set up algorithm parameters for erase command */
 296         buf_set_u32(algo_params.address, 0, 32, address);
 297         buf_set_u32(algo_params.length,  0, 32, length);
 298         buf_set_u32(algo_params.command, 0, 32, CC26XX_CMD_ERASE_SECTORS);
 299         buf_set_u32(algo_params.status,  0, 32, CC26XX_BUFFER_FULL);
 300
 301         /* Issue flash helper algorithm parameters for erase */
 302         retval = target_write_buffer(target, cc26xx_bank->params_addr[0],
 303                                 sizeof(algo_params), (uint8_t *)&algo_params);
 304
 305         /* If no error, wait for erase to finish */
 306         if (ERROR_OK == retval)
 307                 retval = cc26xx_wait_algo_done(bank, cc26xx_bank->params_addr[0]);
 308
 309         /* Regardless of errors, try to close down algo */
 310         (void)cc26xx_quit(bank);
 311
 312         return retval;
 313 }
 314
 315 static int cc26xx_write(struct flash_bank *bank, const uint8_t *buffer,
 316         uint32_t offset, uint32_t count)
 317 {
 318         struct target *target = bank->target;
 319         struct cc26xx_bank *cc26xx_bank = bank->driver_priv;
 320         struct cc26xx_algo_params algo_params[2];
 321         uint32_t size = 0;
 322         long long start_ms;
 323         long long elapsed_ms;
 324         uint32_t address;
 325
 326         uint32_t index;
 327         int retval;
 328
 329         if (TARGET_HALTED != target->state) {
 330                 LOG_ERROR("Target not halted");
 331                 return ERROR_TARGET_NOT_HALTED;
 332         }
 333
 334         retval = cc26xx_init(bank);
 335         if (ERROR_OK != retval)
 336                 return retval;
 337
 338         /* Initialize algorithm parameters to default values */
 339         buf_set_u32(algo_params[0].command, 0, 32, CC26XX_CMD_PROGRAM);
 340         buf_set_u32(algo_params[1].command, 0, 32, CC26XX_CMD_PROGRAM);
 341
 342         /* Write requested data, ping-ponging between two buffers */
 343         index = 0;
 344         start_ms = timeval_ms();
 345         address = bank->base + offset;
 346         while (count > 0) {
 347
 348                 if (count > cc26xx_bank->sector_length)
 349                         size = cc26xx_bank->sector_length;
 350                 else
 351                         size = count;
 352
 353                 /* Put next block of data to flash into buffer */
 354                 retval = target_write_buffer(target, cc26xx_bank->buffer_addr[index],
 355                                         size, buffer);
 356                 if (ERROR_OK != retval) {
 357                         LOG_ERROR("Unable to write data to target memory");
 358                         break;
 359                 }
 360
 361                 /* Update algo parameters for next block */
 362                 buf_set_u32(algo_params[index].address, 0, 32, address);
 363                 buf_set_u32(algo_params[index].length,  0, 32, size);
 364                 buf_set_u32(algo_params[index].status,  0, 32, CC26XX_BUFFER_FULL);
 365
 366                 /* Issue flash helper algorithm parameters for block write */
 367                 retval = target_write_buffer(target, cc26xx_bank->params_addr[index],
 368                                         sizeof(algo_params[index]), (uint8_t *)&algo_params[index]);
 369                 if (ERROR_OK != retval)
 370                         break;
 371
 372                 /* Wait for next ping pong buffer to be ready */
 373                 index ^= 1;
 374                 retval = cc26xx_wait_algo_done(bank, cc26xx_bank->params_addr[index]);
 375                 if (ERROR_OK != retval)
 376                         break;
 377
 378                 count -= size;
 379                 buffer += size;
 380                 address += size;
 381
 382                 elapsed_ms = timeval_ms() - start_ms;
 383                 if (elapsed_ms > 500)
 384                         keep_alive();
 385         }
 386
 387         /* If no error yet, wait for last buffer to finish */
 388         if (ERROR_OK == retval) {
 389                 index ^= 1;
 390                 retval = cc26xx_wait_algo_done(bank, cc26xx_bank->params_addr[index]);
 391         }
 392
 393         /* Regardless of errors, try to close down algo */
 394         (void)cc26xx_quit(bank);
 395
 396         return retval;
 397 }
 398
 399 static int cc26xx_probe(struct flash_bank *bank)
 400 {
 401         struct target *target = bank->target;
 402         struct cc26xx_bank *cc26xx_bank = bank->driver_priv;
 403
 404         uint32_t sector_length;
 405         uint32_t value;
 406         int num_sectors;
 407         int max_sectors;
 408
 409         int retval;
 410
 411         retval = target_read_u32(target, FCFG1_ICEPICK_ID, &value);
 412         if (ERROR_OK != retval)
 413                 return retval;
 414         cc26xx_bank->icepick_id = value;
 415
 416         retval = target_read_u32(target, FCFG1_USER_ID, &value);
 417         if (ERROR_OK != retval)
 418                 return retval;
 419         cc26xx_bank->user_id = value;
 420
 421         cc26xx_bank->device_type = cc26xx_device_type(cc26xx_bank->icepick_id,
 422                 cc26xx_bank->user_id);
 423
 424         sector_length = cc26xx_sector_length(cc26xx_bank->icepick_id);
 425
 426         /* Set up appropriate flash helper algorithm */
 427         switch (cc26xx_bank->icepick_id & ICEPICK_ID_MASK) {
 428                 case CC26X0_ICEPICK_ID:
 429                 case CC26X1_ICEPICK_ID:
 430                 case CC13X0_ICEPICK_ID:
 431                         /* Chameleon family device */
 432                         cc26xx_bank->algo_code = cc26x0_algo;
 433                         cc26xx_bank->algo_size = sizeof(cc26x0_algo);
 434                         cc26xx_bank->algo_working_size = CC26X0_WORKING_SIZE;
 435                         cc26xx_bank->buffer_addr[0] = CC26X0_ALGO_BUFFER_0;
 436                         cc26xx_bank->buffer_addr[1] = CC26X0_ALGO_BUFFER_1;
 437                         cc26xx_bank->params_addr[0] = CC26X0_ALGO_PARAMS_0;
 438                         cc26xx_bank->params_addr[1] = CC26X0_ALGO_PARAMS_1;
 439                         max_sectors = CC26X0_MAX_SECTORS;
 440                         break;
 441                 case CC13X2_CC26X2_ICEPICK_ID:
 442                 default:
 443                         /* Agama family device */
 444                         cc26xx_bank->algo_code = cc26x2_algo;
 445                         cc26xx_bank->algo_size = sizeof(cc26x2_algo);
 446                         cc26xx_bank->algo_working_size = CC26X2_WORKING_SIZE;
 447                         cc26xx_bank->buffer_addr[0] = CC26X2_ALGO_BUFFER_0;
 448                         cc26xx_bank->buffer_addr[1] = CC26X2_ALGO_BUFFER_1;
 449                         cc26xx_bank->params_addr[0] = CC26X2_ALGO_PARAMS_0;
 450                         cc26xx_bank->params_addr[1] = CC26X2_ALGO_PARAMS_1;
 451                         max_sectors = CC26X2_MAX_SECTORS;
 452                         break;
 453         }
 454
 455         retval = target_read_u32(target, CC26XX_FLASH_SIZE_INFO, &value);
 456         if (ERROR_OK != retval)
 457                 return retval;
 458         num_sectors = value & 0xff;
 459         if (num_sectors > max_sectors)
 460                 num_sectors = max_sectors;
 461
 462         bank->sectors = malloc(sizeof(struct flash_sector) * num_sectors);
 463         if (NULL == bank->sectors)
 464                 return ERROR_FAIL;
 465
 466         bank->base = CC26XX_FLASH_BASE_ADDR;
 467         bank->num_sectors = num_sectors;
 468         bank->size = num_sectors * sector_length;
 469         bank->write_start_alignment = 0;
 470         bank->write_end_alignment = 0;
 471         cc26xx_bank->sector_length = sector_length;
 472
 473         for (int i = 0; i < num_sectors; i++) {
 474                 bank->sectors[i].offset = i * sector_length;
 475                 bank->sectors[i].size = sector_length;
 476                 bank->sectors[i].is_erased = -1;
 477                 bank->sectors[i].is_protected = 0;
 478         }
 479
 480         /* We've successfully determined the stats on the flash bank */
 481         cc26xx_bank->probed = true;
 482
 483         /* If we fall through to here, then all went well */
 484
 485         return ERROR_OK;
 486 }
 487
 488 static int cc26xx_auto_probe(struct flash_bank *bank)
 489 {
 490         struct cc26xx_bank *cc26xx_bank = bank->driver_priv;
 491
 492         int retval = ERROR_OK;
 493
 494         if (!cc26xx_bank->probed)
 495                 retval = cc26xx_probe(bank);
 496
 497         return retval;
 498 }
 499
 500 static int cc26xx_info(struct flash_bank *bank, char *buf, int buf_size)
 501 {
 502         struct cc26xx_bank *cc26xx_bank = bank->driver_priv;
 503         int printed = 0;
 504         const char *device;
 505
 506         switch (cc26xx_bank->device_type) {
 507                 case CC26X0_TYPE:
 508                         device = "CC26x0";
 509                         break;
 510                 case CC26X1_TYPE:
 511                         device = "CC26x1";
 512                         break;
 513                 case CC13X0_TYPE:
 514                         device = "CC13x0";
 515                         break;
 516                 case CC13X2_TYPE:
 517                         device = "CC13x2";
 518                         break;
 519                 case CC26X2_TYPE:
 520                         device = "CC26x2";
 521                         break;
 522                 case CC26XX_NO_TYPE:
 523                 default:
 524                         device = "Unrecognized";
 525                         break;
 526         }
 527
 528         printed = snprintf(buf, buf_size,
 529                 "%s device: ICEPick ID 0x%08x, USER ID 0x%08x\n",
 530                 device, cc26xx_bank->icepick_id, cc26xx_bank->user_id);
 531
 532         if (printed >= buf_size)
 533                 return ERROR_BUF_TOO_SMALL;
 534
 535         return ERROR_OK;
 536 }
 537
 538 const struct flash_driver cc26xx_flash = {
 539         .name = "cc26xx",
 540         .flash_bank_command = cc26xx_flash_bank_command,
 541         .erase = cc26xx_erase,
 542         .write = cc26xx_write,
 543         .read = default_flash_read,
 544         .probe = cc26xx_probe,
 545         .auto_probe = cc26xx_auto_probe,
 546         .erase_check = default_flash_blank_check,
 547         .info = cc26xx_info,
 548         .free_driver_priv = default_flash_free_driver_priv,
 549 };