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 #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 #else
  92         struct spi_flash *new;
  93 #endif
  94
  95         if (argc >= 2) {
  96                 cs = simple_strtoul(argv[1], &endp, 0);
  97                 if (*argv[1] == 0 || (*endp != 0 && *endp != ':'))
  98                         return -1;
  99                 if (*endp == ':') {
 100                         if (endp[1] == 0)
 101                                 return -1;
 102
 103                         bus = cs;
 104                         cs = simple_strtoul(endp + 1, &endp, 0);
 105                         if (*endp != 0)
 106                                 return -1;
 107                 }
 108         }
 109
 110         if (argc >= 3) {
 111                 speed = simple_strtoul(argv[2], &endp, 0);
 112                 if (*argv[2] == 0 || *endp != 0)
 113                         return -1;
 114         }
 115         if (argc >= 4) {
 116                 mode = simple_strtoul(argv[3], &endp, 16);
 117                 if (*argv[3] == 0 || *endp != 0)
 118                         return -1;
 119         }
 120
 121 #ifdef CONFIG_DM_SPI_FLASH
 122         /* Remove the old device, otherwise probe will just be a nop */
 123         ret = spi_find_bus_and_cs(bus, cs, &bus_dev, &new);
 124         if (!ret) {
 125                 device_remove(new);
 126                 device_unbind(new);
 127         }
 128         flash = NULL;
 129         ret = spi_flash_probe_bus_cs(bus, cs, speed, mode, &new);
 130         if (ret) {
 131                 printf("Failed to initialize SPI flash at %u:%u (error %d)\n",
 132                        bus, cs, ret);
 133                 return 1;
 134         }
 135
 136         flash = dev_get_uclass_priv(new);
 137 #else
 138         if (flash)
 139                 spi_flash_free(flash);
 140
 141         new = spi_flash_probe(bus, cs, speed, mode);
 142         flash = new;
 143
 144         if (!new) {
 145                 printf("Failed to initialize SPI flash at %u:%u\n", bus, cs);
 146                 return 1;
 147         }
 148
 149         flash = new;
 150 #endif
 151
 152         return 0;
 153 }
 154
 155 /**
 156  * Write a block of data to SPI flash, first checking if it is different from
 157  * what is already there.
 158  *
 159  * If the data being written is the same, then *skipped is incremented by len.
 160  *
 161  * @param flash         flash context pointer
 162  * @param offset        flash offset to write
 163  * @param len           number of bytes to write
 164  * @param buf           buffer to write from
 165  * @param cmp_buf       read buffer to use to compare data
 166  * @param skipped       Count of skipped data (incremented by this function)
 167  * @return NULL if OK, else a string containing the stage which failed
 168  */
 169 static const char *spi_flash_update_block(struct spi_flash *flash, u32 offset,
 170                 size_t len, const char *buf, char *cmp_buf, size_t *skipped)
 171 {
 172         char *ptr = (char *)buf;
 173
 174         debug("offset=%#x, sector_size=%#x, len=%#zx\n",
 175               offset, flash->sector_size, len);
 176         /* Read the entire sector so to allow for rewriting */
 177         if (spi_flash_read(flash, offset, flash->sector_size, cmp_buf))
 178                 return "read";
 179         /* Compare only what is meaningful (len) */
 180         if (memcmp(cmp_buf, buf, len) == 0) {
 181                 debug("Skip region %x size %zx: no change\n",
 182                       offset, len);
 183                 *skipped += len;
 184                 return NULL;
 185         }
 186         /* Erase the entire sector */
 187         if (spi_flash_erase(flash, offset, flash->sector_size))
 188                 return "erase";
 189         /* If it's a partial sector, copy the data into the temp-buffer */
 190         if (len != flash->sector_size) {
 191                 memcpy(cmp_buf, buf, len);
 192                 ptr = cmp_buf;
 193         }
 194         /* Write one complete sector */
 195         if (spi_flash_write(flash, offset, flash->sector_size, ptr))
 196                 return "write";
 197
 198         return NULL;
 199 }
 200
 201 /**
 202  * Update an area of SPI flash by erasing and writing any blocks which need
 203  * to change. Existing blocks with the correct data are left unchanged.
 204  *
 205  * @param flash         flash context pointer
 206  * @param offset        flash offset to write
 207  * @param len           number of bytes to write
 208  * @param buf           buffer to write from
 209  * @return 0 if ok, 1 on error
 210  */
 211 static int spi_flash_update(struct spi_flash *flash, u32 offset,
 212                 size_t len, const char *buf)
 213 {
 214         const char *err_oper = NULL;
 215         char *cmp_buf;
 216         const char *end = buf + len;
 217         size_t todo;            /* number of bytes to do in this pass */
 218         size_t skipped = 0;     /* statistics */
 219         const ulong start_time = get_timer(0);
 220         size_t scale = 1;
 221         const char *start_buf = buf;
 222         ulong delta;
 223
 224         if (end - buf >= 200)
 225                 scale = (end - buf) / 100;
 226         cmp_buf = malloc(flash->sector_size);
 227         if (cmp_buf) {
 228                 ulong last_update = get_timer(0);
 229
 230                 for (; buf < end && !err_oper; buf += todo, offset += todo) {
 231                         todo = min_t(size_t, end - buf, flash->sector_size);
 232                         if (get_timer(last_update) > 100) {
 233                                 printf("   \rUpdating, %zu%% %lu B/s",
 234                                        100 - (end - buf) / scale,
 235                                         bytes_per_second(buf - start_buf,
 236                                                          start_time));
 237                                 last_update = get_timer(0);
 238                         }
 239                         err_oper = spi_flash_update_block(flash, offset, todo,
 240                                         buf, cmp_buf, &skipped);
 241                 }
 242         } else {
 243                 err_oper = "malloc";
 244         }
 245         free(cmp_buf);
 246         putc('\r');
 247         if (err_oper) {
 248                 printf("SPI flash failed in %s step\n", err_oper);
 249                 return 1;
 250         }
 251
 252         delta = get_timer(start_time);
 253         printf("%zu bytes written, %zu bytes skipped", len - skipped,
 254                skipped);
 255         printf(" in %ld.%lds, speed %ld B/s\n",
 256                delta / 1000, delta % 1000, bytes_per_second(len, start_time));
 257
 258         return 0;
 259 }
 260
 261 static int do_spi_flash_read_write(int argc, char * const argv[])
 262 {
 263         unsigned long addr;
 264         void *buf;
 265         char *endp;
 266         int ret = 1;
 267         int dev = 0;
 268         loff_t offset, len, maxsize;
 269
 270         if (argc < 3)
 271                 return -1;
 272
 273         addr = simple_strtoul(argv[1], &endp, 16);
 274         if (*argv[1] == 0 || *endp != 0)
 275                 return -1;
 276
 277         if (mtd_arg_off_size(argc - 2, &argv[2], &dev, &offset, &len,
 278                              &maxsize, MTD_DEV_TYPE_NOR, flash->size))
 279                 return -1;
 280
 281         /* Consistency checking */
 282         if (offset + len > flash->size) {
 283                 printf("ERROR: attempting %s past flash size (%#x)\n",
 284                        argv[0], flash->size);
 285                 return 1;
 286         }
 287
 288         buf = map_physmem(addr, len, MAP_WRBACK);
 289         if (!buf) {
 290                 puts("Failed to map physical memory\n");
 291                 return 1;
 292         }
 293
 294         if (strcmp(argv[0], "update") == 0) {
 295                 ret = spi_flash_update(flash, offset, len, buf);
 296         } else if (strncmp(argv[0], "read", 4) == 0 ||
 297                         strncmp(argv[0], "write", 5) == 0) {
 298                 int read;
 299
 300                 read = strncmp(argv[0], "read", 4) == 0;
 301                 if (read)
 302                         ret = spi_flash_read(flash, offset, len, buf);
 303                 else
 304                         ret = spi_flash_write(flash, offset, len, buf);
 305
 306                 printf("SF: %zu bytes @ %#x %s: %s\n", (size_t)len, (u32)offset,
 307                        read ? "Read" : "Written", ret ? "ERROR" : "OK");
 308         }
 309
 310         unmap_physmem(buf, len);
 311
 312         return ret == 0 ? 0 : 1;
 313 }
 314
 315 static int do_spi_flash_erase(int argc, char * const argv[])
 316 {
 317         int ret;
 318         int dev = 0;
 319         loff_t offset, len, maxsize;
 320         ulong size;
 321
 322         if (argc < 3)
 323                 return -1;
 324
 325         if (mtd_arg_off(argv[1], &dev, &offset, &len, &maxsize,
 326                         MTD_DEV_TYPE_NOR, flash->size))
 327                 return -1;
 328
 329         ret = sf_parse_len_arg(argv[2], &size);
 330         if (ret != 1)
 331                 return -1;
 332
 333         /* Consistency checking */
 334         if (offset + size > flash->size) {
 335                 printf("ERROR: attempting %s past flash size (%#x)\n",
 336                        argv[0], flash->size);
 337                 return 1;
 338         }
 339
 340         ret = spi_flash_erase(flash, offset, size);
 341         printf("SF: %zu bytes @ %#x Erased: %s\n", (size_t)size, (u32)offset,
 342                ret ? "ERROR" : "OK");
 343
 344         return ret == 0 ? 0 : 1;
 345 }
 346
 347 #ifdef CONFIG_CMD_SF_TEST
 348 enum {
 349         STAGE_ERASE,
 350         STAGE_CHECK,
 351         STAGE_WRITE,
 352         STAGE_READ,
 353
 354         STAGE_COUNT,
 355 };
 356
 357 static char *stage_name[STAGE_COUNT] = {
 358         "erase",
 359         "check",
 360         "write",
 361         "read",
 362 };
 363
 364 struct test_info {
 365         int stage;
 366         int bytes;
 367         unsigned base_ms;
 368         unsigned time_ms[STAGE_COUNT];
 369 };
 370
 371 static void show_time(struct test_info *test, int stage)
 372 {
 373         uint64_t speed; /* KiB/s */
 374         int bps;        /* Bits per second */
 375
 376         speed = (long long)test->bytes * 1000;
 377         if (test->time_ms[stage])
 378                 do_div(speed, test->time_ms[stage] * 1024);
 379         bps = speed * 8;
 380
 381         printf("%d %s: %d ticks, %d KiB/s %d.%03d Mbps\n", stage,
 382                stage_name[stage], test->time_ms[stage],
 383                (int)speed, bps / 1000, bps % 1000);
 384 }
 385
 386 static void spi_test_next_stage(struct test_info *test)
 387 {
 388         test->time_ms[test->stage] = get_timer(test->base_ms);
 389         show_time(test, test->stage);
 390         test->base_ms = get_timer(0);
 391         test->stage++;
 392 }
 393
 394 /**
 395  * Run a test on the SPI flash
 396  *
 397  * @param flash         SPI flash to use
 398  * @param buf           Source buffer for data to write
 399  * @param len           Size of data to read/write
 400  * @param offset        Offset within flash to check
 401  * @param vbuf          Verification buffer
 402  * @return 0 if ok, -1 on error
 403  */
 404 static int spi_flash_test(struct spi_flash *flash, uint8_t *buf, ulong len,
 405                            ulong offset, uint8_t *vbuf)
 406 {
 407         struct test_info test;
 408         int i;
 409
 410         printf("SPI flash test:\n");
 411         memset(&test, '\0', sizeof(test));
 412         test.base_ms = get_timer(0);
 413         test.bytes = len;
 414         if (spi_flash_erase(flash, offset, len)) {
 415                 printf("Erase failed\n");
 416                 return -1;
 417         }
 418         spi_test_next_stage(&test);
 419
 420         if (spi_flash_read(flash, offset, len, vbuf)) {
 421                 printf("Check read failed\n");
 422                 return -1;
 423         }
 424         for (i = 0; i < len; i++) {
 425                 if (vbuf[i] != 0xff) {
 426                         printf("Check failed at %d\n", i);
 427                         print_buffer(i, vbuf + i, 1,
 428                                      min_t(uint, len - i, 0x40), 0);
 429                         return -1;
 430                 }
 431         }
 432         spi_test_next_stage(&test);
 433
 434         if (spi_flash_write(flash, offset, len, buf)) {
 435                 printf("Write failed\n");
 436                 return -1;
 437         }
 438         memset(vbuf, '\0', len);
 439         spi_test_next_stage(&test);
 440
 441         if (spi_flash_read(flash, offset, len, vbuf)) {
 442                 printf("Read failed\n");
 443                 return -1;
 444         }
 445         spi_test_next_stage(&test);
 446
 447         for (i = 0; i < len; i++) {
 448                 if (buf[i] != vbuf[i]) {
 449                         printf("Verify failed at %d, good data:\n", i);
 450                         print_buffer(i, buf + i, 1,
 451                                      min_t(uint, len - i, 0x40), 0);
 452                         printf("Bad data:\n");
 453                         print_buffer(i, vbuf + i, 1,
 454                                      min_t(uint, len - i, 0x40), 0);
 455                         return -1;
 456                 }
 457         }
 458         printf("Test passed\n");
 459         for (i = 0; i < STAGE_COUNT; i++)
 460                 show_time(&test, i);
 461
 462         return 0;
 463 }
 464
 465 static int do_spi_flash_test(int argc, char * const argv[])
 466 {
 467         unsigned long offset;
 468         unsigned long len;
 469         uint8_t *buf, *from;
 470         char *endp;
 471         uint8_t *vbuf;
 472         int ret;
 473
 474         if (argc < 3)
 475                 return -1;
 476         offset = simple_strtoul(argv[1], &endp, 16);
 477         if (*argv[1] == 0 || *endp != 0)
 478                 return -1;
 479         len = simple_strtoul(argv[2], &endp, 16);
 480         if (*argv[2] == 0 || *endp != 0)
 481                 return -1;
 482
 483         vbuf = malloc(len);
 484         if (!vbuf) {
 485                 printf("Cannot allocate memory (%lu bytes)\n", len);
 486                 return 1;
 487         }
 488         buf = malloc(len);
 489         if (!buf) {
 490                 free(vbuf);
 491                 printf("Cannot allocate memory (%lu bytes)\n", len);
 492                 return 1;
 493         }
 494
 495         from = map_sysmem(CONFIG_SYS_TEXT_BASE, 0);
 496         memcpy(buf, from, len);
 497         ret = spi_flash_test(flash, buf, len, offset, vbuf);
 498         free(vbuf);
 499         free(buf);
 500         if (ret) {
 501                 printf("Test failed\n");
 502                 return 1;
 503         }
 504
 505         return 0;
 506 }
 507 #endif /* CONFIG_CMD_SF_TEST */
 508
 509 static int do_spi_flash(cmd_tbl_t *cmdtp, int flag, int argc,
 510                         char * const argv[])
 511 {
 512         const char *cmd;
 513         int ret;
 514
 515         /* need at least two arguments */
 516         if (argc < 2)
 517                 goto usage;
 518
 519         cmd = argv[1];
 520         --argc;
 521         ++argv;
 522
 523         if (strcmp(cmd, "probe") == 0) {
 524                 ret = do_spi_flash_probe(argc, argv);
 525                 goto done;
 526         }
 527
 528         /* The remaining commands require a selected device */
 529         if (!flash) {
 530                 puts("No SPI flash selected. Please run `sf probe'\n");
 531                 return 1;
 532         }
 533
 534         if (strcmp(cmd, "read") == 0 || strcmp(cmd, "write") == 0 ||
 535             strcmp(cmd, "update") == 0)
 536                 ret = do_spi_flash_read_write(argc, argv);
 537         else if (strcmp(cmd, "erase") == 0)
 538                 ret = do_spi_flash_erase(argc, argv);
 539 #ifdef CONFIG_CMD_SF_TEST
 540         else if (!strcmp(cmd, "test"))
 541                 ret = do_spi_flash_test(argc, argv);
 542 #endif
 543         else
 544                 ret = -1;
 545
 546 done:
 547         if (ret != -1)
 548                 return ret;
 549
 550 usage:
 551         return CMD_RET_USAGE;
 552 }
 553
 554 #ifdef CONFIG_CMD_SF_TEST
 555 #define SF_TEST_HELP "\nsf test offset len              " \
 556                 "- run a very basic destructive test"
 557 #else
 558 #define SF_TEST_HELP
 559 #endif
 560
 561 U_BOOT_CMD(
 562         sf,     5,      1,      do_spi_flash,
 563         "SPI flash sub-system",
 564         "probe [[bus:]cs] [hz] [mode]   - init flash device on given SPI bus\n"
 565         "                                 and chip select\n"
 566         "sf read addr offset|partition len      - read `len' bytes starting at\n"
 567         "                                         `offset' or from start of mtd\n"
 568         "                                         `partition'to memory at `addr'\n"
 569         "sf write addr offset|partition len     - write `len' bytes from memory\n"
 570         "                                         at `addr' to flash at `offset'\n"
 571         "                                         or to start of mtd `partition'\n"
 572         "sf erase offset|partition [+]len       - erase `len' bytes from `offset'\n"
 573         "                                         or from start of mtd `partition'\n"
 574         "                                        `+len' round up `len' to block size\n"
 575         "sf update addr offset|partition len    - erase and write `len' bytes from memory\n"
 576         "                                         at `addr' to flash at `offset'\n"
 577         "                                         or to start of mtd `partition'\n"
 578         SF_TEST_HELP
 579 );