1 // SPDX-License-Identifier: GPL-2.0+
3 * Command for accessing SPI flash.
5 * Copyright (C) 2008 Atmel Corporation
14 #include <spi_flash.h>
15 #include <jffs2/jffs2.h>
16 #include <linux/mtd/mtd.h>
19 #include <dm/device-internal.h>
21 static struct spi_flash *flash;
24 * This function computes the length argument for the erase command.
25 * The length on which the command is to operate can be given in two forms:
26 * 1. <cmd> offset len - operate on <'offset', 'len')
27 * 2. <cmd> offset +len - operate on <'offset', 'round_up(len)')
28 * If the second form is used and the length doesn't fall on the
29 * sector boundary, than it will be adjusted to the next sector boundary.
30 * If it isn't in the flash, the function will fail (return -1).
32 * arg: length specification (i.e. both command arguments)
34 * len: computed length for operation
37 * -1: failure (bad format, bad address).
39 static int sf_parse_len_arg(char *arg, ulong *len)
42 char round_up_len; /* indicates if the "+length" form used */
51 len_arg = simple_strtoul(arg, &ep, 16);
52 if (ep == arg || *ep != '\0')
55 if (round_up_len && flash->sector_size > 0)
56 *len = ROUND(len_arg, flash->sector_size);
64 * This function takes a byte length and a delta unit of time to compute the
65 * approximate bytes per second
67 * @param len amount of bytes currently processed
68 * @param start_ms start time of processing in ms
69 * @return bytes per second if OK, 0 on error
71 static ulong bytes_per_second(unsigned int len, ulong start_ms)
73 /* less accurate but avoids overflow */
74 if (len >= ((unsigned int) -1) / 1024)
75 return len / (max(get_timer(start_ms) / 1024, 1UL));
77 return 1024 * len / max(get_timer(start_ms), 1UL);
80 static int do_spi_flash_probe(int argc, char * const argv[])
82 unsigned int bus = CONFIG_SF_DEFAULT_BUS;
83 unsigned int cs = CONFIG_SF_DEFAULT_CS;
84 /* In DM mode, defaults speed and mode will be taken from DT */
85 unsigned int speed = CONFIG_SF_DEFAULT_SPEED;
86 unsigned int mode = CONFIG_SF_DEFAULT_MODE;
88 #ifdef CONFIG_DM_SPI_FLASH
89 struct udevice *new, *bus_dev;
92 struct spi_flash *new;
96 cs = simple_strtoul(argv[1], &endp, 0);
97 if (*argv[1] == 0 || (*endp != 0 && *endp != ':'))
104 cs = simple_strtoul(endp + 1, &endp, 0);
111 speed = simple_strtoul(argv[2], &endp, 0);
112 if (*argv[2] == 0 || *endp != 0)
116 mode = simple_strtoul(argv[3], &endp, 16);
117 if (*argv[3] == 0 || *endp != 0)
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);
125 device_remove(new, DM_REMOVE_NORMAL);
128 ret = spi_flash_probe_bus_cs(bus, cs, speed, mode, &new);
130 printf("Failed to initialize SPI flash at %u:%u (error %d)\n",
135 flash = dev_get_uclass_priv(new);
138 spi_flash_free(flash);
140 new = spi_flash_probe(bus, cs, speed, mode);
144 printf("Failed to initialize SPI flash at %u:%u\n", bus, cs);
155 * Write a block of data to SPI flash, first checking if it is different from
156 * what is already there.
158 * If the data being written is the same, then *skipped is incremented by len.
160 * @param flash flash context pointer
161 * @param offset flash offset to write
162 * @param len number of bytes to write
163 * @param buf buffer to write from
164 * @param cmp_buf read buffer to use to compare data
165 * @param skipped Count of skipped data (incremented by this function)
166 * @return NULL if OK, else a string containing the stage which failed
168 static const char *spi_flash_update_block(struct spi_flash *flash, u32 offset,
169 size_t len, const char *buf, char *cmp_buf, size_t *skipped)
171 char *ptr = (char *)buf;
173 debug("offset=%#x, sector_size=%#x, len=%#zx\n",
174 offset, flash->sector_size, len);
175 /* Read the entire sector so to allow for rewriting */
176 if (spi_flash_read(flash, offset, flash->sector_size, cmp_buf))
178 /* Compare only what is meaningful (len) */
179 if (memcmp(cmp_buf, buf, len) == 0) {
180 debug("Skip region %x size %zx: no change\n",
185 /* Erase the entire sector */
186 if (spi_flash_erase(flash, offset, flash->sector_size))
188 /* If it's a partial sector, copy the data into the temp-buffer */
189 if (len != flash->sector_size) {
190 memcpy(cmp_buf, buf, len);
193 /* Write one complete sector */
194 if (spi_flash_write(flash, offset, flash->sector_size, ptr))
201 * Update an area of SPI flash by erasing and writing any blocks which need
202 * to change. Existing blocks with the correct data are left unchanged.
204 * @param flash flash context pointer
205 * @param offset flash offset to write
206 * @param len number of bytes to write
207 * @param buf buffer to write from
208 * @return 0 if ok, 1 on error
210 static int spi_flash_update(struct spi_flash *flash, u32 offset,
211 size_t len, const char *buf)
213 const char *err_oper = NULL;
215 const char *end = buf + len;
216 size_t todo; /* number of bytes to do in this pass */
217 size_t skipped = 0; /* statistics */
218 const ulong start_time = get_timer(0);
220 const char *start_buf = buf;
223 if (end - buf >= 200)
224 scale = (end - buf) / 100;
225 cmp_buf = memalign(ARCH_DMA_MINALIGN, flash->sector_size);
227 ulong last_update = get_timer(0);
229 for (; buf < end && !err_oper; buf += todo, offset += todo) {
230 todo = min_t(size_t, end - buf, flash->sector_size);
231 if (get_timer(last_update) > 100) {
232 printf(" \rUpdating, %zu%% %lu B/s",
233 100 - (end - buf) / scale,
234 bytes_per_second(buf - start_buf,
236 last_update = get_timer(0);
238 err_oper = spi_flash_update_block(flash, offset, todo,
239 buf, cmp_buf, &skipped);
247 printf("SPI flash failed in %s step\n", err_oper);
251 delta = get_timer(start_time);
252 printf("%zu bytes written, %zu bytes skipped", len - skipped,
254 printf(" in %ld.%lds, speed %ld B/s\n",
255 delta / 1000, delta % 1000, bytes_per_second(len, start_time));
260 static int do_spi_flash_read_write(int argc, char * const argv[])
267 loff_t offset, len, maxsize;
272 addr = simple_strtoul(argv[1], &endp, 16);
273 if (*argv[1] == 0 || *endp != 0)
276 if (mtd_arg_off_size(argc - 2, &argv[2], &dev, &offset, &len,
277 &maxsize, MTD_DEV_TYPE_NOR, flash->size))
280 /* Consistency checking */
281 if (offset + len > flash->size) {
282 printf("ERROR: attempting %s past flash size (%#x)\n",
283 argv[0], flash->size);
287 buf = map_physmem(addr, len, MAP_WRBACK);
289 puts("Failed to map physical memory\n");
293 if (strcmp(argv[0], "update") == 0) {
294 ret = spi_flash_update(flash, offset, len, buf);
295 } else if (strncmp(argv[0], "read", 4) == 0 ||
296 strncmp(argv[0], "write", 5) == 0) {
299 read = strncmp(argv[0], "read", 4) == 0;
301 ret = spi_flash_read(flash, offset, len, buf);
303 ret = spi_flash_write(flash, offset, len, buf);
305 printf("SF: %zu bytes @ %#x %s: ", (size_t)len, (u32)offset,
306 read ? "Read" : "Written");
308 printf("ERROR %d\n", ret);
313 unmap_physmem(buf, len);
315 return ret == 0 ? 0 : 1;
318 static int do_spi_flash_erase(int argc, char * const argv[])
322 loff_t offset, len, maxsize;
328 if (mtd_arg_off(argv[1], &dev, &offset, &len, &maxsize,
329 MTD_DEV_TYPE_NOR, flash->size))
332 ret = sf_parse_len_arg(argv[2], &size);
336 /* Consistency checking */
337 if (offset + size > flash->size) {
338 printf("ERROR: attempting %s past flash size (%#x)\n",
339 argv[0], flash->size);
343 ret = spi_flash_erase(flash, offset, size);
344 printf("SF: %zu bytes @ %#x Erased: %s\n", (size_t)size, (u32)offset,
345 ret ? "ERROR" : "OK");
347 return ret == 0 ? 0 : 1;
350 static int do_spi_protect(int argc, char * const argv[])
359 if (!str2off(argv[2], &start)) {
360 puts("start sector is not a valid number\n");
364 if (!str2off(argv[3], &len)) {
365 puts("len is not a valid number\n");
369 if (strcmp(argv[1], "lock") == 0)
371 else if (strcmp(argv[1], "unlock") == 0)
374 return -1; /* Unknown parameter */
376 ret = spi_flash_protect(flash, start, len, prot);
378 return ret == 0 ? 0 : 1;
381 #ifdef CONFIG_CMD_SF_TEST
391 static char *stage_name[STAGE_COUNT] = {
402 unsigned time_ms[STAGE_COUNT];
405 static void show_time(struct test_info *test, int stage)
407 uint64_t speed; /* KiB/s */
408 int bps; /* Bits per second */
410 speed = (long long)test->bytes * 1000;
411 if (test->time_ms[stage])
412 do_div(speed, test->time_ms[stage] * 1024);
415 printf("%d %s: %u ticks, %d KiB/s %d.%03d Mbps\n", stage,
416 stage_name[stage], test->time_ms[stage],
417 (int)speed, bps / 1000, bps % 1000);
420 static void spi_test_next_stage(struct test_info *test)
422 test->time_ms[test->stage] = get_timer(test->base_ms);
423 show_time(test, test->stage);
424 test->base_ms = get_timer(0);
429 * Run a test on the SPI flash
431 * @param flash SPI flash to use
432 * @param buf Source buffer for data to write
433 * @param len Size of data to read/write
434 * @param offset Offset within flash to check
435 * @param vbuf Verification buffer
436 * @return 0 if ok, -1 on error
438 static int spi_flash_test(struct spi_flash *flash, uint8_t *buf, ulong len,
439 ulong offset, uint8_t *vbuf)
441 struct test_info test;
444 printf("SPI flash test:\n");
445 memset(&test, '\0', sizeof(test));
446 test.base_ms = get_timer(0);
448 if (spi_flash_erase(flash, offset, len)) {
449 printf("Erase failed\n");
452 spi_test_next_stage(&test);
454 if (spi_flash_read(flash, offset, len, vbuf)) {
455 printf("Check read failed\n");
458 for (i = 0; i < len; i++) {
459 if (vbuf[i] != 0xff) {
460 printf("Check failed at %d\n", i);
461 print_buffer(i, vbuf + i, 1,
462 min_t(uint, len - i, 0x40), 0);
466 spi_test_next_stage(&test);
468 if (spi_flash_write(flash, offset, len, buf)) {
469 printf("Write failed\n");
472 memset(vbuf, '\0', len);
473 spi_test_next_stage(&test);
475 if (spi_flash_read(flash, offset, len, vbuf)) {
476 printf("Read failed\n");
479 spi_test_next_stage(&test);
481 for (i = 0; i < len; i++) {
482 if (buf[i] != vbuf[i]) {
483 printf("Verify failed at %d, good data:\n", i);
484 print_buffer(i, buf + i, 1,
485 min_t(uint, len - i, 0x40), 0);
486 printf("Bad data:\n");
487 print_buffer(i, vbuf + i, 1,
488 min_t(uint, len - i, 0x40), 0);
492 printf("Test passed\n");
493 for (i = 0; i < STAGE_COUNT; i++)
499 static int do_spi_flash_test(int argc, char * const argv[])
501 unsigned long offset;
510 offset = simple_strtoul(argv[1], &endp, 16);
511 if (*argv[1] == 0 || *endp != 0)
513 len = simple_strtoul(argv[2], &endp, 16);
514 if (*argv[2] == 0 || *endp != 0)
517 vbuf = memalign(ARCH_DMA_MINALIGN, len);
519 printf("Cannot allocate memory (%lu bytes)\n", len);
522 buf = memalign(ARCH_DMA_MINALIGN, len);
525 printf("Cannot allocate memory (%lu bytes)\n", len);
529 from = map_sysmem(CONFIG_SYS_TEXT_BASE, 0);
530 memcpy(buf, from, len);
531 ret = spi_flash_test(flash, buf, len, offset, vbuf);
535 printf("Test failed\n");
541 #endif /* CONFIG_CMD_SF_TEST */
543 static int do_spi_flash(cmd_tbl_t *cmdtp, int flag, int argc,
549 /* need at least two arguments */
557 if (strcmp(cmd, "probe") == 0) {
558 ret = do_spi_flash_probe(argc, argv);
562 /* The remaining commands require a selected device */
564 puts("No SPI flash selected. Please run `sf probe'\n");
568 if (strcmp(cmd, "read") == 0 || strcmp(cmd, "write") == 0 ||
569 strcmp(cmd, "update") == 0)
570 ret = do_spi_flash_read_write(argc, argv);
571 else if (strcmp(cmd, "erase") == 0)
572 ret = do_spi_flash_erase(argc, argv);
573 else if (strcmp(cmd, "protect") == 0)
574 ret = do_spi_protect(argc, argv);
575 #ifdef CONFIG_CMD_SF_TEST
576 else if (!strcmp(cmd, "test"))
577 ret = do_spi_flash_test(argc, argv);
587 return CMD_RET_USAGE;
590 #ifdef CONFIG_CMD_SF_TEST
591 #define SF_TEST_HELP "\nsf test offset len " \
592 "- run a very basic destructive test"
598 sf, 5, 1, do_spi_flash,
599 "SPI flash sub-system",
600 "probe [[bus:]cs] [hz] [mode] - init flash device on given SPI bus\n"
602 "sf read addr offset|partition len - read `len' bytes starting at\n"
603 " `offset' or from start of mtd\n"
604 " `partition'to memory at `addr'\n"
605 "sf write addr offset|partition len - write `len' bytes from memory\n"
606 " at `addr' to flash at `offset'\n"
607 " or to start of mtd `partition'\n"
608 "sf erase offset|partition [+]len - erase `len' bytes from `offset'\n"
609 " or from start of mtd `partition'\n"
610 " `+len' round up `len' to block size\n"
611 "sf update addr offset|partition len - erase and write `len' bytes from memory\n"
612 " at `addr' to flash at `offset'\n"
613 " or to start of mtd `partition'\n"
614 "sf protect lock/unlock sector len - protect/unprotect 'len' bytes starting\n"
615 " at address 'sector'\n"