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