cmd/sf.c

   1 /*
   2  * Command for accessing SPI flash.
   3  *
   4  * Copyright (C) 2008 Atmel Corporation
   5  *
   6  * SPDX-License-Identifier:     GPL-2.0+
   7  */
   8
   9 #include <common.h>
  10 #include <div64.h>
  11 #include <dm.h>
  12 #include <malloc.h>
  13 #include <mapmem.h>
  14 #include <spi.h>
  15 #include <spi_flash.h>
  16 #include <jffs2/jffs2.h>
  17 #include <linux/mtd/mtd.h>
  18
  19 #include <asm/io.h>
  20 #include <dm/device-internal.h>
  21
  22 static struct spi_flash *flash;
  23
  24 /*
  25  * This function computes the length argument for the erase command.
  26  * The length on which the command is to operate can be given in two forms:
  27  * 1. <cmd> offset len  - operate on <'offset',  'len')
  28  * 2. <cmd> offset +len - operate on <'offset',  'round_up(len)')
  29  * If the second form is used and the length doesn't fall on the
  30  * sector boundary, than it will be adjusted to the next sector boundary.
  31  * If it isn't in the flash, the function will fail (return -1).
  32  * Input:
  33  *    arg: length specification (i.e. both command arguments)
  34  * Output:
  35  *    len: computed length for operation
  36  * Return:
  37  *    1: success
  38  *   -1: failure (bad format, bad address).
  39  */
  40 static int sf_parse_len_arg(char *arg, ulong *len)
  41 {
  42         char *ep;
  43         char round_up_len; /* indicates if the "+length" form used */
  44         ulong len_arg;
  45
  46         round_up_len = 0;
  47         if (*arg == '+') {
  48                 round_up_len = 1;
  49                 ++arg;
  50         }
  51
  52         len_arg = simple_strtoul(arg, &ep, 16);
  53         if (ep == arg || *ep != '\0')
  54                 return -1;
  55
  56         if (round_up_len && flash->sector_size > 0)
  57                 *len = ROUND(len_arg, flash->sector_size);
  58         else
  59                 *len = len_arg;
  60
  61         return 1;
  62 }
  63
  64 /**
  65  * This function takes a byte length and a delta unit of time to compute the
  66  * approximate bytes per second
  67  *
  68  * @param len           amount of bytes currently processed
  69  * @param start_ms      start time of processing in ms
  70  * @return bytes per second if OK, 0 on error
  71  */
  72 static ulong bytes_per_second(unsigned int len, ulong start_ms)
  73 {
  74         /* less accurate but avoids overflow */
  75         if (len >= ((unsigned int) -1) / 1024)
  76                 return len / (max(get_timer(start_ms) / 1024, 1UL));
  77         else
  78                 return 1024 * len / max(get_timer(start_ms), 1UL);
  79 }
  80
  81 static int do_spi_flash_probe(int argc, char * const argv[])
  82 {
  83         unsigned int bus = CONFIG_SF_DEFAULT_BUS;
  84         unsigned int cs = CONFIG_SF_DEFAULT_CS;
  85         unsigned int speed = CONFIG_SF_DEFAULT_SPEED;
  86         unsigned int mode = CONFIG_SF_DEFAULT_MODE;
  87         char *endp;
  88 #ifdef CONFIG_DM_SPI_FLASH
  89         struct udevice *new, *bus_dev;
  90         int ret;
  91         /* In DM mode defaults will be taken from DT */
  92         speed = 0, mode = 0;
  93 #else
  94         struct spi_flash *new;
  95 #endif
  96
  97         if (argc >= 2) {
  98                 cs = simple_strtoul(argv[1], &endp, 0);
  99                 if (*argv[1] == 0 || (*endp != 0 && *endp != ':'))
 100                         return -1;
 101                 if (*endp == ':') {
 102                         if (endp[1] == 0)
 103                                 return -1;
 104
 105                         bus = cs;
 106                         cs = simple_strtoul(endp + 1, &endp, 0);
 107                         if (*endp != 0)
 108                                 return -1;
 109                 }
 110         }
 111
 112         if (argc >= 3) {
 113                 speed = simple_strtoul(argv[2], &endp, 0);
 114                 if (*argv[2] == 0 || *endp != 0)
 115                         return -1;
 116         }
 117         if (argc >= 4) {
 118                 mode = simple_strtoul(argv[3], &endp, 16);
 119                 if (*argv[3] == 0 || *endp != 0)
 120                         return -1;
 121         }
 122
 123 #ifdef CONFIG_DM_SPI_FLASH
 124         /* Remove the old device, otherwise probe will just be a nop */
 125         ret = spi_find_bus_and_cs(bus, cs, &bus_dev, &new);
 126         if (!ret) {
 127                 device_remove(new);
 128                 device_unbind(new);
 129         }
 130         flash = NULL;
 131         ret = spi_flash_probe_bus_cs(bus, cs, speed, mode, &new);
 132         if (ret) {
 133                 printf("Failed to initialize SPI flash at %u:%u (error %d)\n",
 134                        bus, cs, ret);
 135                 return 1;
 136         }
 137
 138         flash = dev_get_uclass_priv(new);
 139 #else
 140         if (flash)
 141                 spi_flash_free(flash);
 142
 143         new = spi_flash_probe(bus, cs, speed, mode);
 144         flash = new;
 145
 146         if (!new) {
 147                 printf("Failed to initialize SPI flash at %u:%u\n", bus, cs);
 148                 return 1;
 149         }
 150
 151         flash = new;
 152 #endif
 153
 154         return 0;
 155 }
 156
 157 /**
 158  * Write a block of data to SPI flash, first checking if it is different from
 159  * what is already there.
 160  *
 161  * If the data being written is the same, then *skipped is incremented by len.
 162  *
 163  * @param flash         flash context pointer
 164  * @param offset        flash offset to write
 165  * @param len           number of bytes to write
 166  * @param buf           buffer to write from
 167  * @param cmp_buf       read buffer to use to compare data
 168  * @param skipped       Count of skipped data (incremented by this function)
 169  * @return NULL if OK, else a string containing the stage which failed
 170  */
 171 static const char *spi_flash_update_block(struct spi_flash *flash, u32 offset,
 172                 size_t len, const char *buf, char *cmp_buf, size_t *skipped)
 173 {
 174         char *ptr = (char *)buf;
 175
 176         debug("offset=%#x, sector_size=%#x, len=%#zx\n",
 177               offset, flash->sector_size, len);
 178         /* Read the entire sector so to allow for rewriting */
 179         if (spi_flash_read(flash, offset, flash->sector_size, cmp_buf))
 180                 return "read";
 181         /* Compare only what is meaningful (len) */
 182         if (memcmp(cmp_buf, buf, len) == 0) {
 183                 debug("Skip region %x size %zx: no change\n",
 184                       offset, len);
 185                 *skipped += len;
 186                 return NULL;
 187         }
 188         /* Erase the entire sector */
 189         if (spi_flash_erase(flash, offset, flash->sector_size))
 190                 return "erase";
 191         /* If it's a partial sector, copy the data into the temp-buffer */
 192         if (len != flash->sector_size) {
 193                 memcpy(cmp_buf, buf, len);
 194                 ptr = cmp_buf;
 195         }
 196         /* Write one complete sector */
 197         if (spi_flash_write(flash, offset, flash->sector_size, ptr))
 198                 return "write";
 199
 200         return NULL;
 201 }
 202
 203 /**
 204  * Update an area of SPI flash by erasing and writing any blocks which need
 205  * to change. Existing blocks with the correct data are left unchanged.
 206  *
 207  * @param flash         flash context pointer
 208  * @param offset        flash offset to write
 209  * @param len           number of bytes to write
 210  * @param buf           buffer to write from
 211  * @return 0 if ok, 1 on error
 212  */
 213 static int spi_flash_update(struct spi_flash *flash, u32 offset,
 214                 size_t len, const char *buf)
 215 {
 216         const char *err_oper = NULL;
 217         char *cmp_buf;
 218         const char *end = buf + len;
 219         size_t todo;            /* number of bytes to do in this pass */
 220         size_t skipped = 0;     /* statistics */
 221         const ulong start_time = get_timer(0);
 222         size_t scale = 1;
 223         const char *start_buf = buf;
 224         ulong delta;
 225
 226         if (end - buf >= 200)
 227                 scale = (end - buf) / 100;
 228         cmp_buf = memalign(ARCH_DMA_MINALIGN, flash->sector_size);
 229         if (cmp_buf) {
 230                 ulong last_update = get_timer(0);
 231
 232                 for (; buf < end && !err_oper; buf += todo, offset += todo) {
 233                         todo = min_t(size_t, end - buf, flash->sector_size);
 234                         if (get_timer(last_update) > 100) {
 235                                 printf("   \rUpdating, %zu%% %lu B/s",
 236                                        100 - (end - buf) / scale,
 237                                         bytes_per_second(buf - start_buf,
 238                                                          start_time));
 239                                 last_update = get_timer(0);
 240                         }
 241                         err_oper = spi_flash_update_block(flash, offset, todo,
 242                                         buf, cmp_buf, &skipped);
 243                 }
 244         } else {
 245                 err_oper = "malloc";
 246         }
 247         free(cmp_buf);
 248         putc('\r');
 249         if (err_oper) {
 250                 printf("SPI flash failed in %s step\n", err_oper);
 251                 return 1;
 252         }
 253
 254         delta = get_timer(start_time);
 255         printf("%zu bytes written, %zu bytes skipped", len - skipped,
 256                skipped);
 257         printf(" in %ld.%lds, speed %ld B/s\n",
 258                delta / 1000, delta % 1000, bytes_per_second(len, start_time));
 259
 260         return 0;
 261 }
 262
 263 static int do_spi_flash_read_write(int argc, char * const argv[])
 264 {
 265         unsigned long addr;
 266         void *buf;
 267         char *endp;
 268         int ret = 1;
 269         int dev = 0;
 270         loff_t offset, len, maxsize;
 271
 272         if (argc < 3)
 273                 return -1;
 274
 275         addr = simple_strtoul(argv[1], &endp, 16);
 276         if (*argv[1] == 0 || *endp != 0)
 277                 return -1;
 278
 279         if (mtd_arg_off_size(argc - 2, &argv[2], &dev, &offset, &len,
 280                              &maxsize, MTD_DEV_TYPE_NOR, flash->size))
 281                 return -1;
 282
 283         /* Consistency checking */
 284         if (offset + len > flash->size) {
 285                 printf("ERROR: attempting %s past flash size (%#x)\n",
 286                        argv[0], flash->size);
 287                 return 1;
 288         }
 289
 290         buf = map_physmem(addr, len, MAP_WRBACK);
 291         if (!buf) {
 292                 puts("Failed to map physical memory\n");
 293                 return 1;
 294         }
 295
 296         if (strcmp(argv[0], "update") == 0) {
 297                 ret = spi_flash_update(flash, offset, len, buf);
 298         } else if (strncmp(argv[0], "read", 4) == 0 ||
 299                         strncmp(argv[0], "write", 5) == 0) {
 300                 int read;
 301
 302                 read = strncmp(argv[0], "read", 4) == 0;
 303                 if (read)
 304                         ret = spi_flash_read(flash, offset, len, buf);
 305                 else
 306                         ret = spi_flash_write(flash, offset, len, buf);
 307
 308                 printf("SF: %zu bytes @ %#x %s: ", (size_t)len, (u32)offset,
 309                        read ? "Read" : "Written");
 310                 if (ret)
 311                         printf("ERROR %d\n", ret);
 312                 else
 313                         printf("OK\n");
 314         }
 315
 316         unmap_physmem(buf, len);
 317
 318         return ret == 0 ? 0 : 1;
 319 }
 320
 321 static int do_spi_flash_erase(int argc, char * const argv[])
 322 {
 323         int ret;
 324         int dev = 0;
 325         loff_t offset, len, maxsize;
 326         ulong size;
 327
 328         if (argc < 3)
 329                 return -1;
 330
 331         if (mtd_arg_off(argv[1], &dev, &offset, &len, &maxsize,
 332                         MTD_DEV_TYPE_NOR, flash->size))
 333                 return -1;
 334
 335         ret = sf_parse_len_arg(argv[2], &size);
 336         if (ret != 1)
 337                 return -1;
 338
 339         /* Consistency checking */
 340         if (offset + size > flash->size) {
 341                 printf("ERROR: attempting %s past flash size (%#x)\n",
 342                        argv[0], flash->size);
 343                 return 1;
 344         }
 345
 346         ret = spi_flash_erase(flash, offset, size);
 347         printf("SF: %zu bytes @ %#x Erased: %s\n", (size_t)size, (u32)offset,
 348                ret ? "ERROR" : "OK");
 349
 350         return ret == 0 ? 0 : 1;
 351 }
 352
 353 static int do_spi_protect(int argc, char * const argv[])
 354 {
 355         int ret = 0;
 356         loff_t start, len;
 357         bool prot = false;
 358
 359         if (argc != 4)
 360                 return -1;
 361
 362         if (!str2off(argv[2], &start)) {
 363                 puts("start sector is not a valid number\n");
 364                 return 1;
 365         }
 366
 367         if (!str2off(argv[3], &len)) {
 368                 puts("len is not a valid number\n");
 369                 return 1;
 370         }
 371
 372         if (strcmp(argv[1], "lock") == 0)
 373                 prot = true;
 374         else if (strcmp(argv[1], "unlock") == 0)
 375                 prot = false;
 376         else
 377                 return -1;  /* Unknown parameter */
 378
 379         ret = spi_flash_protect(flash, start, len, prot);
 380
 381         return ret == 0 ? 0 : 1;
 382 }
 383
 384 #ifdef CONFIG_CMD_SF_TEST
 385 enum {
 386         STAGE_ERASE,
 387         STAGE_CHECK,
 388         STAGE_WRITE,
 389         STAGE_READ,
 390
 391         STAGE_COUNT,
 392 };
 393
 394 static char *stage_name[STAGE_COUNT] = {
 395         "erase",
 396         "check",
 397         "write",
 398         "read",
 399 };
 400
 401 struct test_info {
 402         int stage;
 403         int bytes;
 404         unsigned base_ms;
 405         unsigned time_ms[STAGE_COUNT];
 406 };
 407
 408 static void show_time(struct test_info *test, int stage)
 409 {
 410         uint64_t speed; /* KiB/s */
 411         int bps;        /* Bits per second */
 412
 413         speed = (long long)test->bytes * 1000;
 414         if (test->time_ms[stage])
 415                 do_div(speed, test->time_ms[stage] * 1024);
 416         bps = speed * 8;
 417
 418         printf("%d %s: %d ticks, %d KiB/s %d.%03d Mbps\n", stage,
 419                stage_name[stage], test->time_ms[stage],
 420                (int)speed, bps / 1000, bps % 1000);
 421 }
 422
 423 static void spi_test_next_stage(struct test_info *test)
 424 {
 425         test->time_ms[test->stage] = get_timer(test->base_ms);
 426         show_time(test, test->stage);
 427         test->base_ms = get_timer(0);
 428         test->stage++;
 429 }
 430
 431 /**
 432  * Run a test on the SPI flash
 433  *
 434  * @param flash         SPI flash to use
 435  * @param buf           Source buffer for data to write
 436  * @param len           Size of data to read/write
 437  * @param offset        Offset within flash to check
 438  * @param vbuf          Verification buffer
 439  * @return 0 if ok, -1 on error
 440  */
 441 static int spi_flash_test(struct spi_flash *flash, uint8_t *buf, ulong len,
 442                            ulong offset, uint8_t *vbuf)
 443 {
 444         struct test_info test;
 445         int i;
 446
 447         printf("SPI flash test:\n");
 448         memset(&test, '\0', sizeof(test));
 449         test.base_ms = get_timer(0);
 450         test.bytes = len;
 451         if (spi_flash_erase(flash, offset, len)) {
 452                 printf("Erase failed\n");
 453                 return -1;
 454         }
 455         spi_test_next_stage(&test);
 456
 457         if (spi_flash_read(flash, offset, len, vbuf)) {
 458                 printf("Check read failed\n");
 459                 return -1;
 460         }
 461         for (i = 0; i < len; i++) {
 462                 if (vbuf[i] != 0xff) {
 463                         printf("Check failed at %d\n", i);
 464                         print_buffer(i, vbuf + i, 1,
 465                                      min_t(uint, len - i, 0x40), 0);
 466                         return -1;
 467                 }
 468         }
 469         spi_test_next_stage(&test);
 470
 471         if (spi_flash_write(flash, offset, len, buf)) {
 472                 printf("Write failed\n");
 473                 return -1;
 474         }
 475         memset(vbuf, '\0', len);
 476         spi_test_next_stage(&test);
 477
 478         if (spi_flash_read(flash, offset, len, vbuf)) {
 479                 printf("Read failed\n");
 480                 return -1;
 481         }
 482         spi_test_next_stage(&test);
 483
 484         for (i = 0; i < len; i++) {
 485                 if (buf[i] != vbuf[i]) {
 486                         printf("Verify failed at %d, good data:\n", i);
 487                         print_buffer(i, buf + i, 1,
 488                                      min_t(uint, len - i, 0x40), 0);
 489                         printf("Bad data:\n");
 490                         print_buffer(i, vbuf + i, 1,
 491                                      min_t(uint, len - i, 0x40), 0);
 492                         return -1;
 493                 }
 494         }
 495         printf("Test passed\n");
 496         for (i = 0; i < STAGE_COUNT; i++)
 497                 show_time(&test, i);
 498
 499         return 0;
 500 }
 501
 502 static int do_spi_flash_test(int argc, char * const argv[])
 503 {
 504         unsigned long offset;
 505         unsigned long len;
 506         uint8_t *buf, *from;
 507         char *endp;
 508         uint8_t *vbuf;
 509         int ret;
 510
 511         if (argc < 3)
 512                 return -1;
 513         offset = simple_strtoul(argv[1], &endp, 16);
 514         if (*argv[1] == 0 || *endp != 0)
 515                 return -1;
 516         len = simple_strtoul(argv[2], &endp, 16);
 517         if (*argv[2] == 0 || *endp != 0)
 518                 return -1;
 519
 520         vbuf = memalign(ARCH_DMA_MINALIGN, len);
 521         if (!vbuf) {
 522                 printf("Cannot allocate memory (%lu bytes)\n", len);
 523                 return 1;
 524         }
 525         buf = memalign(ARCH_DMA_MINALIGN, len);
 526         if (!buf) {
 527                 free(vbuf);
 528                 printf("Cannot allocate memory (%lu bytes)\n", len);
 529                 return 1;
 530         }
 531
 532         from = map_sysmem(CONFIG_SYS_TEXT_BASE, 0);
 533         memcpy(buf, from, len);
 534         ret = spi_flash_test(flash, buf, len, offset, vbuf);
 535         free(vbuf);
 536         free(buf);
 537         if (ret) {
 538                 printf("Test failed\n");
 539                 return 1;
 540         }
 541
 542         return 0;
 543 }
 544 #endif /* CONFIG_CMD_SF_TEST */
 545
 546 static int do_spi_flash(cmd_tbl_t *cmdtp, int flag, int argc,
 547                         char * const argv[])
 548 {
 549         const char *cmd;
 550         int ret;
 551
 552         /* need at least two arguments */
 553         if (argc < 2)
 554                 goto usage;
 555
 556         cmd = argv[1];
 557         --argc;
 558         ++argv;
 559
 560         if (strcmp(cmd, "probe") == 0) {
 561                 ret = do_spi_flash_probe(argc, argv);
 562                 goto done;
 563         }
 564
 565         /* The remaining commands require a selected device */
 566         if (!flash) {
 567                 puts("No SPI flash selected. Please run `sf probe'\n");
 568                 return 1;
 569         }
 570
 571         if (strcmp(cmd, "read") == 0 || strcmp(cmd, "write") == 0 ||
 572             strcmp(cmd, "update") == 0)
 573                 ret = do_spi_flash_read_write(argc, argv);
 574         else if (strcmp(cmd, "erase") == 0)
 575                 ret = do_spi_flash_erase(argc, argv);
 576         else if (strcmp(cmd, "protect") == 0)
 577                 ret = do_spi_protect(argc, argv);
 578 #ifdef CONFIG_CMD_SF_TEST
 579         else if (!strcmp(cmd, "test"))
 580                 ret = do_spi_flash_test(argc, argv);
 581 #endif
 582         else
 583                 ret = -1;
 584
 585 done:
 586         if (ret != -1)
 587                 return ret;
 588
 589 usage:
 590         return CMD_RET_USAGE;
 591 }
 592
 593 #ifdef CONFIG_CMD_SF_TEST
 594 #define SF_TEST_HELP "\nsf test offset len              " \
 595                 "- run a very basic destructive test"
 596 #else
 597 #define SF_TEST_HELP
 598 #endif
 599
 600 U_BOOT_CMD(
 601         sf,     5,      1,      do_spi_flash,
 602         "SPI flash sub-system",
 603         "probe [[bus:]cs] [hz] [mode]   - init flash device on given SPI bus\n"
 604         "                                 and chip select\n"
 605         "sf read addr offset|partition len      - read `len' bytes starting at\n"
 606         "                                         `offset' or from start of mtd\n"
 607         "                                         `partition'to memory at `addr'\n"
 608         "sf write addr offset|partition len     - write `len' bytes from memory\n"
 609         "                                         at `addr' to flash at `offset'\n"
 610         "                                         or to start of mtd `partition'\n"
 611         "sf erase offset|partition [+]len       - erase `len' bytes from `offset'\n"
 612         "                                         or from start of mtd `partition'\n"
 613         "                                        `+len' round up `len' to block size\n"
 614         "sf update addr offset|partition len    - erase and write `len' bytes from memory\n"
 615         "                                         at `addr' to flash at `offset'\n"
 616         "                                         or to start of mtd `partition'\n"
 617         "sf protect lock/unlock sector len      - protect/unprotect 'len' bytes starting\n"
 618         "                                         at address 'sector'\n"
 619         SF_TEST_HELP
 620 );