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   1 /***************************************************************************
   2  *   Copyright (C) 2010 by Antonio Borneo <borneo.antonio@gmail.com>       *
   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 /* STM Serial Memory Interface (SMI) controller is a SPI bus controller
  19  * specifically designed for SPI memories.
  20  * Only SPI "mode 3" (CPOL=1 and CPHA=1) is supported.
  21  * Two working modes are available:
  22  * - SW mode: the SPI is controlled by SW. Any custom commands can be sent
  23  *   on the bus.
  24  * - HW mode: the SPI but is under SMI control. Memory content is directly
  25  *   accessible in CPU memory space. CPU can read, write and execute memory
  26  *   content. */
  27
  28 /* ATTENTION:
  29  * To have flash memory mapped in CPU memory space, the SMI controller
  30  * have to be in "HW mode". This requires following constraints:
  31  * 1) The command "reset init" have to initialize SMI controller and put
  32  *    it in HW mode;
  33  * 2) every command in this file have to return to prompt in HW mode. */
  34
  35 #ifdef HAVE_CONFIG_H
  36 #include "config.h"
  37 #endif
  38
  39 #include "imp.h"
  40 #include "spi.h"
  41 #include <jtag/jtag.h>
  42 #include <helper/time_support.h>
  43
  44 #define SMI_READ_REG(a) (_SMI_READ_REG(a))
  45 #define _SMI_READ_REG(a)                        \
  46 {                                                                       \
  47         int __a;                                                \
  48         uint32_t __v;                                   \
  49                                                                         \
  50         __a = target_read_u32(target, io_base + (a), &__v); \
  51         if (__a != ERROR_OK)                    \
  52                 return __a;                                     \
  53         __v;                                                    \
  54 }
  55
  56 #define SMI_WRITE_REG(a, v)                     \
  57 {                                                                       \
  58         int __r;                                                \
  59                                                                         \
  60         __r = target_write_u32(target, io_base + (a), (v)); \
  61         if (__r != ERROR_OK)                    \
  62                 return __r;                                     \
  63 }
  64
  65 #define SMI_POLL_TFF(timeout)           \
  66 {                                                                       \
  67         int __r;                                                \
  68                                                                         \
  69         __r = poll_tff(target, io_base, timeout); \
  70         if (__r != ERROR_OK)                    \
  71                 return __r;                                     \
  72 }
  73
  74 #define SMI_SET_SW_MODE()       SMI_WRITE_REG(SMI_CR1, \
  75         SMI_READ_REG(SMI_CR1) | SMI_SW_MODE)
  76 #define SMI_SET_HWWB_MODE() SMI_WRITE_REG(SMI_CR1, \
  77         (SMI_READ_REG(SMI_CR1) | SMI_WB_MODE) & ~SMI_SW_MODE)
  78 #define SMI_SET_HW_MODE()       SMI_WRITE_REG(SMI_CR1, \
  79         SMI_READ_REG(SMI_CR1) & ~(SMI_SW_MODE | SMI_WB_MODE))
  80 #define SMI_CLEAR_TFF()         SMI_WRITE_REG(SMI_SR, ~SMI_TFF)
  81
  82 #define SMI_BANK_SIZE      (0x01000000)
  83
  84 #define SMI_CR1 (0x00) /* Control register 1 */
  85 #define SMI_CR2 (0x04) /* Control register 2 */
  86 #define SMI_SR  (0x08) /* Status register */
  87 #define SMI_TR  (0x0c) /* TX */
  88 #define SMI_RR  (0x10) /* RX */
  89
  90 /* fields in SMI_CR1 */
  91 #define SMI_SW_MODE       0x10000000 /* set to enable SW Mode */
  92 #define SMI_WB_MODE       0x20000000 /* Write Burst Mode */
  93
  94 /* fields in SMI_CR2 */
  95 #define SMI_TX_LEN_1      0x00000001 /* data length = 1 byte */
  96 #define SMI_TX_LEN_4      0x00000004 /* data length = 4 byte */
  97 #define SMI_RX_LEN_3      0x00000030 /* data length = 3 byte */
  98 #define SMI_SEND          0x00000080 /* Send data */
  99 #define SMI_RSR           0x00000400 /* reads status reg */
 100 #define SMI_WE            0x00000800 /* Write Enable */
 101 #define SMI_SEL_BANK0     0x00000000 /* Select Bank0 */
 102 #define SMI_SEL_BANK1     0x00001000 /* Select Bank1 */
 103 #define SMI_SEL_BANK2     0x00002000 /* Select Bank2 */
 104 #define SMI_SEL_BANK3     0x00003000 /* Select Bank3 */
 105
 106 /* fields in SMI_SR */
 107 #define SMI_TFF           0x00000100 /* Transfer Finished Flag */
 108
 109 /* Commands */
 110 #define SMI_READ_ID       0x0000009F /* Read Flash Identification */
 111
 112 /* Timeout in ms */
 113 #define SMI_CMD_TIMEOUT   (100)
 114 #define SMI_PROBE_TIMEOUT (100)
 115 #define SMI_MAX_TIMEOUT  (3000)
 116
 117 struct stmsmi_flash_bank {
 118         int probed;
 119         uint32_t io_base;
 120         uint32_t bank_num;
 121         const struct flash_device *dev;
 122 };
 123
 124 struct stmsmi_target {
 125         char *name;
 126         uint32_t tap_idcode;
 127         uint32_t smi_base;
 128         uint32_t io_base;
 129 };
 130
 131 static const struct stmsmi_target target_devices[] = {
 132         /* name,          tap_idcode, smi_base,   io_base */
 133         { "SPEAr3xx/6xx", 0x07926041, 0xf8000000, 0xfc000000 },
 134         { "STR75x",       0x4f1f0041, 0x80000000, 0x90000000 },
 135         { NULL,           0,          0,          0 }
 136 };
 137
 138 FLASH_BANK_COMMAND_HANDLER(stmsmi_flash_bank_command)
 139 {
 140         struct stmsmi_flash_bank *stmsmi_info;
 141
 142         LOG_DEBUG("%s", __func__);
 143
 144         if (CMD_ARGC < 6)
 145                 return ERROR_COMMAND_SYNTAX_ERROR;
 146
 147         stmsmi_info = malloc(sizeof(struct stmsmi_flash_bank));
 148         if (stmsmi_info == NULL) {
 149                 LOG_ERROR("not enough memory");
 150                 return ERROR_FAIL;
 151         }
 152
 153         bank->driver_priv = stmsmi_info;
 154         stmsmi_info->probed = 0;
 155
 156         return ERROR_OK;
 157 }
 158
 159 /* Poll transmit finished flag */
 160 /* timeout in ms */
 161 static int poll_tff(struct target *target, uint32_t io_base, int timeout)
 162 {
 163         int64_t endtime;
 164
 165         if (SMI_READ_REG(SMI_SR) & SMI_TFF)
 166                 return ERROR_OK;
 167
 168         endtime = timeval_ms() + timeout;
 169         do {
 170                 alive_sleep(1);
 171                 if (SMI_READ_REG(SMI_SR) & SMI_TFF)
 172                         return ERROR_OK;
 173         } while (timeval_ms() < endtime);
 174
 175         LOG_ERROR("Timeout while polling TFF");
 176         return ERROR_FLASH_OPERATION_FAILED;
 177 }
 178
 179 /* Read the status register of the external SPI flash chip.
 180  * The operation is triggered by setting SMI_RSR bit.
 181  * SMI sends the proper SPI command (0x05) and returns value in SMI_SR */
 182 static int read_status_reg(struct flash_bank *bank, uint32_t *status)
 183 {
 184         struct target *target = bank->target;
 185         struct stmsmi_flash_bank *stmsmi_info = bank->driver_priv;
 186         uint32_t io_base = stmsmi_info->io_base;
 187
 188         /* clear transmit finished flag */
 189         SMI_CLEAR_TFF();
 190
 191         /* Read status */
 192         SMI_WRITE_REG(SMI_CR2, stmsmi_info->bank_num | SMI_RSR);
 193
 194         /* Poll transmit finished flag */
 195         SMI_POLL_TFF(SMI_CMD_TIMEOUT);
 196
 197         /* clear transmit finished flag */
 198         SMI_CLEAR_TFF();
 199
 200         *status = SMI_READ_REG(SMI_SR) & 0x0000ffff;
 201
 202         /* clean-up SMI_CR2 */
 203         SMI_WRITE_REG(SMI_CR2, 0); /* AB: Required ? */
 204
 205         return ERROR_OK;
 206 }
 207
 208 /* check for WIP (write in progress) bit in status register */
 209 /* timeout in ms */
 210 static int wait_till_ready(struct flash_bank *bank, int timeout)
 211 {
 212         uint32_t status;
 213         int retval;
 214         int64_t endtime;
 215
 216         endtime = timeval_ms() + timeout;
 217         do {
 218                 /* read flash status register */
 219                 retval = read_status_reg(bank, &status);
 220                 if (retval != ERROR_OK)
 221                         return retval;
 222
 223                 if ((status & SPIFLASH_BSY_BIT) == 0)
 224                         return ERROR_OK;
 225                 alive_sleep(1);
 226         } while (timeval_ms() < endtime);
 227
 228         LOG_ERROR("timeout");
 229         return ERROR_FAIL;
 230 }
 231
 232 /* Send "write enable" command to SPI flash chip.
 233  * The operation is triggered by setting SMI_WE bit, and SMI sends
 234  * the proper SPI command (0x06) */
 235 static int smi_write_enable(struct flash_bank *bank)
 236 {
 237         struct target *target = bank->target;
 238         struct stmsmi_flash_bank *stmsmi_info = bank->driver_priv;
 239         uint32_t io_base = stmsmi_info->io_base;
 240         uint32_t status;
 241         int retval;
 242
 243         /* Enter in HW mode */
 244         SMI_SET_HW_MODE(); /* AB: is this correct ?*/
 245
 246         /* clear transmit finished flag */
 247         SMI_CLEAR_TFF();
 248
 249         /* Send write enable command */
 250         SMI_WRITE_REG(SMI_CR2, stmsmi_info->bank_num | SMI_WE);
 251
 252         /* Poll transmit finished flag */
 253         SMI_POLL_TFF(SMI_CMD_TIMEOUT);
 254
 255         /* read flash status register */
 256         retval = read_status_reg(bank, &status);
 257         if (retval != ERROR_OK)
 258                 return retval;
 259
 260         /* Check write enabled */
 261         if ((status & SPIFLASH_WE_BIT) == 0) {
 262                 LOG_ERROR("Cannot enable write to flash. Status=0x%08" PRIx32, status);
 263                 return ERROR_FAIL;
 264         }
 265
 266         return ERROR_OK;
 267 }
 268
 269 static uint32_t erase_command(struct stmsmi_flash_bank *stmsmi_info,
 270         uint32_t offset)
 271 {
 272         union {
 273                 uint32_t command;
 274                 uint8_t x[4];
 275         } cmd;
 276
 277         cmd.x[0] = stmsmi_info->dev->erase_cmd;
 278         cmd.x[1] = offset >> 16;
 279         cmd.x[2] = offset >> 8;
 280         cmd.x[3] = offset;
 281
 282         return cmd.command;
 283 }
 284
 285 static int smi_erase_sector(struct flash_bank *bank, int sector)
 286 {
 287         struct target *target = bank->target;
 288         struct stmsmi_flash_bank *stmsmi_info = bank->driver_priv;
 289         uint32_t io_base = stmsmi_info->io_base;
 290         uint32_t cmd;
 291         int retval;
 292
 293         retval = smi_write_enable(bank);
 294         if (retval != ERROR_OK)
 295                 return retval;
 296
 297         /* Switch to SW mode to send sector erase command */
 298         SMI_SET_SW_MODE();
 299
 300         /* clear transmit finished flag */
 301         SMI_CLEAR_TFF();
 302
 303         /* send SPI command "block erase" */
 304         cmd = erase_command(stmsmi_info, bank->sectors[sector].offset);
 305         SMI_WRITE_REG(SMI_TR, cmd);
 306         SMI_WRITE_REG(SMI_CR2, stmsmi_info->bank_num | SMI_SEND | SMI_TX_LEN_4);
 307
 308         /* Poll transmit finished flag */
 309         SMI_POLL_TFF(SMI_CMD_TIMEOUT);
 310
 311         /* poll WIP for end of self timed Sector Erase cycle */
 312         retval = wait_till_ready(bank, SMI_MAX_TIMEOUT);
 313         if (retval != ERROR_OK)
 314                 return retval;
 315
 316         return ERROR_OK;
 317 }
 318
 319 static int stmsmi_erase(struct flash_bank *bank, int first, int last)
 320 {
 321         struct target *target = bank->target;
 322         struct stmsmi_flash_bank *stmsmi_info = bank->driver_priv;
 323         uint32_t io_base = stmsmi_info->io_base;
 324         int retval = ERROR_OK;
 325         int sector;
 326
 327         LOG_DEBUG("%s: from sector %d to sector %d", __func__, first, last);
 328
 329         if (target->state != TARGET_HALTED) {
 330                 LOG_ERROR("Target not halted");
 331                 return ERROR_TARGET_NOT_HALTED;
 332         }
 333
 334         if ((first < 0) || (last < first) || (last >= bank->num_sectors)) {
 335                 LOG_ERROR("Flash sector invalid");
 336                 return ERROR_FLASH_SECTOR_INVALID;
 337         }
 338
 339         if (!(stmsmi_info->probed)) {
 340                 LOG_ERROR("Flash bank not probed");
 341                 return ERROR_FLASH_BANK_NOT_PROBED;
 342         }
 343
 344         for (sector = first; sector <= last; sector++) {
 345                 if (bank->sectors[sector].is_protected) {
 346                         LOG_ERROR("Flash sector %d protected", sector);
 347                         return ERROR_FAIL;
 348                 }
 349         }
 350
 351         for (sector = first; sector <= last; sector++) {
 352                 retval = smi_erase_sector(bank, sector);
 353                 if (retval != ERROR_OK)
 354                         break;
 355                 keep_alive();
 356         }
 357
 358         /* Switch to HW mode before return to prompt */
 359         SMI_SET_HW_MODE();
 360         return retval;
 361 }
 362
 363 static int stmsmi_protect(struct flash_bank *bank, int set,
 364         int first, int last)
 365 {
 366         int sector;
 367
 368         for (sector = first; sector <= last; sector++)
 369                 bank->sectors[sector].is_protected = set;
 370         return ERROR_OK;
 371 }
 372
 373 static int smi_write_buffer(struct flash_bank *bank, const uint8_t *buffer,
 374         uint32_t address, uint32_t len)
 375 {
 376         struct target *target = bank->target;
 377         struct stmsmi_flash_bank *stmsmi_info = bank->driver_priv;
 378         uint32_t io_base = stmsmi_info->io_base;
 379         int retval;
 380
 381         LOG_DEBUG("%s: address=0x%08" PRIx32 " len=0x%08" PRIx32,
 382                         __func__, address, len);
 383
 384         retval = smi_write_enable(bank);
 385         if (retval != ERROR_OK)
 386                 return retval;
 387
 388         /* HW mode, write burst mode */
 389         SMI_SET_HWWB_MODE();
 390
 391         retval = target_write_buffer(target, address, len, buffer);
 392         if (retval != ERROR_OK)
 393                 return retval;
 394
 395         return ERROR_OK;
 396 }
 397
 398 static int stmsmi_write(struct flash_bank *bank, const uint8_t *buffer,
 399         uint32_t offset, uint32_t count)
 400 {
 401         struct target *target = bank->target;
 402         struct stmsmi_flash_bank *stmsmi_info = bank->driver_priv;
 403         uint32_t io_base = stmsmi_info->io_base;
 404         uint32_t cur_count, page_size, page_offset;
 405         int sector;
 406         int retval = ERROR_OK;
 407
 408         LOG_DEBUG("%s: offset=0x%08" PRIx32 " count=0x%08" PRIx32,
 409                 __func__, offset, count);
 410
 411         if (target->state != TARGET_HALTED) {
 412                 LOG_ERROR("Target not halted");
 413                 return ERROR_TARGET_NOT_HALTED;
 414         }
 415
 416         if (offset + count > stmsmi_info->dev->size_in_bytes) {
 417                 LOG_WARNING("Write pasts end of flash. Extra data discarded.");
 418                 count = stmsmi_info->dev->size_in_bytes - offset;
 419         }
 420
 421         /* Check sector protection */
 422         for (sector = 0; sector < bank->num_sectors; sector++) {
 423                 /* Start offset in or before this sector? */
 424                 /* End offset in or behind this sector? */
 425                 if ((offset <
 426                                 (bank->sectors[sector].offset + bank->sectors[sector].size))
 427                         && ((offset + count - 1) >= bank->sectors[sector].offset)
 428                         && bank->sectors[sector].is_protected) {
 429                         LOG_ERROR("Flash sector %d protected", sector);
 430                         return ERROR_FAIL;
 431                 }
 432         }
 433
 434         page_size = stmsmi_info->dev->pagesize;
 435
 436         /* unaligned buffer head */
 437         if (count > 0 && (offset & 3) != 0) {
 438                 cur_count = 4 - (offset & 3);
 439                 if (cur_count > count)
 440                         cur_count = count;
 441                 retval = smi_write_buffer(bank, buffer, bank->base + offset,
 442                         cur_count);
 443                 if (retval != ERROR_OK)
 444                         goto err;
 445                 offset += cur_count;
 446                 buffer += cur_count;
 447                 count -= cur_count;
 448         }
 449
 450         page_offset = offset % page_size;
 451         /* central part, aligned words */
 452         while (count >= 4) {
 453                 /* clip block at page boundary */
 454                 if (page_offset + count > page_size)
 455                         cur_count = page_size - page_offset;
 456                 else
 457                         cur_count = count & ~3;
 458
 459                 retval = smi_write_buffer(bank, buffer, bank->base + offset,
 460                         cur_count);
 461                 if (retval != ERROR_OK)
 462                         goto err;
 463
 464                 page_offset = 0;
 465                 buffer += cur_count;
 466                 offset += cur_count;
 467                 count -= cur_count;
 468
 469                 keep_alive();
 470         }
 471
 472         /* buffer tail */
 473         if (count > 0)
 474                 retval = smi_write_buffer(bank, buffer, bank->base + offset, count);
 475
 476 err:
 477         /* Switch to HW mode before return to prompt */
 478         SMI_SET_HW_MODE();
 479         return retval;
 480 }
 481
 482 /* Return ID of flash device */
 483 /* On exit, SW mode is kept */
 484 static int read_flash_id(struct flash_bank *bank, uint32_t *id)
 485 {
 486         struct target *target = bank->target;
 487         struct stmsmi_flash_bank *stmsmi_info = bank->driver_priv;
 488         uint32_t io_base = stmsmi_info->io_base;
 489         int retval;
 490
 491         if (target->state != TARGET_HALTED) {
 492                 LOG_ERROR("Target not halted");
 493                 return ERROR_TARGET_NOT_HALTED;
 494         }
 495
 496         /* poll WIP */
 497         retval = wait_till_ready(bank, SMI_PROBE_TIMEOUT);
 498         if (retval != ERROR_OK)
 499                 return retval;
 500
 501         /* enter in SW mode */
 502         SMI_SET_SW_MODE();
 503
 504         /* clear transmit finished flag */
 505         SMI_CLEAR_TFF();
 506
 507         /* Send SPI command "read ID" */
 508         SMI_WRITE_REG(SMI_TR, SMI_READ_ID);
 509         SMI_WRITE_REG(SMI_CR2,
 510                 stmsmi_info->bank_num | SMI_SEND | SMI_RX_LEN_3 | SMI_TX_LEN_1);
 511
 512         /* Poll transmit finished flag */
 513         SMI_POLL_TFF(SMI_CMD_TIMEOUT);
 514
 515         /* clear transmit finished flag */
 516         SMI_CLEAR_TFF();
 517
 518         /* read ID from Receive Register */
 519         *id = SMI_READ_REG(SMI_RR) & 0x00ffffff;
 520         return ERROR_OK;
 521 }
 522
 523 static int stmsmi_probe(struct flash_bank *bank)
 524 {
 525         struct target *target = bank->target;
 526         struct stmsmi_flash_bank *stmsmi_info = bank->driver_priv;
 527         uint32_t io_base;
 528         struct flash_sector *sectors;
 529         uint32_t id = 0; /* silence uninitialized warning */
 530         const struct stmsmi_target *target_device;
 531         int retval;
 532
 533         if (stmsmi_info->probed)
 534                 free(bank->sectors);
 535         stmsmi_info->probed = 0;
 536
 537         for (target_device = target_devices ; target_device->name ; ++target_device)
 538                 if (target_device->tap_idcode == target->tap->idcode)
 539                         break;
 540         if (!target_device->name) {
 541                 LOG_ERROR("Device ID 0x%" PRIx32 " is not known as SMI capable",
 542                                 target->tap->idcode);
 543                 return ERROR_FAIL;
 544         }
 545
 546         switch (bank->base - target_device->smi_base) {
 547                 case 0:
 548                         stmsmi_info->bank_num = SMI_SEL_BANK0;
 549                         break;
 550                 case SMI_BANK_SIZE:
 551                         stmsmi_info->bank_num = SMI_SEL_BANK1;
 552                         break;
 553                 case 2*SMI_BANK_SIZE:
 554                         stmsmi_info->bank_num = SMI_SEL_BANK2;
 555                         break;
 556                 case 3*SMI_BANK_SIZE:
 557                         stmsmi_info->bank_num = SMI_SEL_BANK3;
 558                         break;
 559                 default:
 560                         LOG_ERROR("Invalid SMI base address 0x%" PRIx32, bank->base);
 561                         return ERROR_FAIL;
 562         }
 563         io_base = target_device->io_base;
 564         stmsmi_info->io_base = io_base;
 565
 566         LOG_DEBUG("Valid SMI on device %s at address 0x%" PRIx32,
 567                 target_device->name, bank->base);
 568
 569         /* read and decode flash ID; returns in SW mode */
 570         retval = read_flash_id(bank, &id);
 571         SMI_SET_HW_MODE();
 572         if (retval != ERROR_OK)
 573                 return retval;
 574
 575         stmsmi_info->dev = NULL;
 576         for (const struct flash_device *p = flash_devices; p->name ; p++)
 577                 if (p->device_id == id) {
 578                         stmsmi_info->dev = p;
 579                         break;
 580                 }
 581
 582         if (!stmsmi_info->dev) {
 583                 LOG_ERROR("Unknown flash device (ID 0x%08" PRIx32 ")", id);
 584                 return ERROR_FAIL;
 585         }
 586
 587         LOG_INFO("Found flash device \'%s\' (ID 0x%08" PRIx32 ")",
 588                 stmsmi_info->dev->name, stmsmi_info->dev->device_id);
 589
 590         /* Set correct size value */
 591         bank->size = stmsmi_info->dev->size_in_bytes;
 592
 593         /* create and fill sectors array */
 594         bank->num_sectors =
 595                 stmsmi_info->dev->size_in_bytes / stmsmi_info->dev->sectorsize;
 596         sectors = malloc(sizeof(struct flash_sector) * bank->num_sectors);
 597         if (sectors == NULL) {
 598                 LOG_ERROR("not enough memory");
 599                 return ERROR_FAIL;
 600         }
 601
 602         for (int sector = 0; sector < bank->num_sectors; sector++) {
 603                 sectors[sector].offset = sector * stmsmi_info->dev->sectorsize;
 604                 sectors[sector].size = stmsmi_info->dev->sectorsize;
 605                 sectors[sector].is_erased = -1;
 606                 sectors[sector].is_protected = 1;
 607         }
 608
 609         bank->sectors = sectors;
 610         stmsmi_info->probed = 1;
 611         return ERROR_OK;
 612 }
 613
 614 static int stmsmi_auto_probe(struct flash_bank *bank)
 615 {
 616         struct stmsmi_flash_bank *stmsmi_info = bank->driver_priv;
 617         if (stmsmi_info->probed)
 618                 return ERROR_OK;
 619         return stmsmi_probe(bank);
 620 }
 621
 622 static int stmsmi_protect_check(struct flash_bank *bank)
 623 {
 624         /* Nothing to do. Protection is only handled in SW. */
 625         return ERROR_OK;
 626 }
 627
 628 static int get_stmsmi_info(struct flash_bank *bank, char *buf, int buf_size)
 629 {
 630         struct stmsmi_flash_bank *stmsmi_info = bank->driver_priv;
 631
 632         if (!(stmsmi_info->probed)) {
 633                 snprintf(buf, buf_size,
 634                         "\nSMI flash bank not probed yet\n");
 635                 return ERROR_OK;
 636         }
 637
 638         snprintf(buf, buf_size, "\nSMI flash information:\n"
 639                 "  Device \'%s\' (ID 0x%08" PRIx32 ")\n",
 640                 stmsmi_info->dev->name, stmsmi_info->dev->device_id);
 641
 642         return ERROR_OK;
 643 }
 644
 645 struct flash_driver stmsmi_flash = {
 646         .name = "stmsmi",
 647         .flash_bank_command = stmsmi_flash_bank_command,
 648         .erase = stmsmi_erase,
 649         .protect = stmsmi_protect,
 650         .write = stmsmi_write,
 651         .read = default_flash_read,
 652         .probe = stmsmi_probe,
 653         .auto_probe = stmsmi_auto_probe,
 654         .erase_check = default_flash_blank_check,
 655         .protect_check = stmsmi_protect_check,
 656         .info = get_stmsmi_info,
 657         .free_driver_priv = default_flash_free_driver_priv,
 658 };