2 * Command for accessing SPI flash.
4 * Copyright (C) 2008 Atmel Corporation
6 * SPDX-License-Identifier: GPL-2.0+
15 #include <spi_flash.h>
16 #include <jffs2/jffs2.h>
17 #include <linux/mtd/mtd.h>
20 #include <dm/device-internal.h>
22 static struct spi_flash *flash;
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).
33 * arg: length specification (i.e. both command arguments)
35 * len: computed length for operation
38 * -1: failure (bad format, bad address).
40 static int sf_parse_len_arg(char *arg, ulong *len)
43 char round_up_len; /* indicates if the "+length" form used */
52 len_arg = simple_strtoul(arg, &ep, 16);
53 if (ep == arg || *ep != '\0')
56 if (round_up_len && flash->sector_size > 0)
57 *len = ROUND(len_arg, flash->sector_size);
65 * This function takes a byte length and a delta unit of time to compute the
66 * approximate bytes per second
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
72 static ulong bytes_per_second(unsigned int len, ulong start_ms)
74 /* less accurate but avoids overflow */
75 if (len >= ((unsigned int) -1) / 1024)
76 return len / (max(get_timer(start_ms) / 1024, 1UL));
78 return 1024 * len / max(get_timer(start_ms), 1UL);
81 static int do_spi_flash_probe(int argc, char * const argv[])
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;
88 #ifdef CONFIG_DM_SPI_FLASH
89 struct udevice *new, *bus_dev;
91 /* In DM mode defaults will be taken from DT */
94 struct spi_flash *new;
98 cs = simple_strtoul(argv[1], &endp, 0);
99 if (*argv[1] == 0 || (*endp != 0 && *endp != ':'))
106 cs = simple_strtoul(endp + 1, &endp, 0);
113 speed = simple_strtoul(argv[2], &endp, 0);
114 if (*argv[2] == 0 || *endp != 0)
118 mode = simple_strtoul(argv[3], &endp, 16);
119 if (*argv[3] == 0 || *endp != 0)
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);
131 ret = spi_flash_probe_bus_cs(bus, cs, speed, mode, &new);
133 printf("Failed to initialize SPI flash at %u:%u (error %d)\n",
138 flash = dev_get_uclass_priv(new);
141 spi_flash_free(flash);
143 new = spi_flash_probe(bus, cs, speed, mode);
147 printf("Failed to initialize SPI flash at %u:%u\n", bus, cs);
158 * Write a block of data to SPI flash, first checking if it is different from
159 * what is already there.
161 * If the data being written is the same, then *skipped is incremented by len.
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
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)
174 char *ptr = (char *)buf;
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))
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",
188 /* Erase the entire sector */
189 if (spi_flash_erase(flash, offset, flash->sector_size))
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);
196 /* Write one complete sector */
197 if (spi_flash_write(flash, offset, flash->sector_size, ptr))
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.
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
213 static int spi_flash_update(struct spi_flash *flash, u32 offset,
214 size_t len, const char *buf)
216 const char *err_oper = NULL;
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);
223 const char *start_buf = buf;
226 if (end - buf >= 200)
227 scale = (end - buf) / 100;
228 cmp_buf = memalign(ARCH_DMA_MINALIGN, flash->sector_size);
230 ulong last_update = get_timer(0);
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,
239 last_update = get_timer(0);
241 err_oper = spi_flash_update_block(flash, offset, todo,
242 buf, cmp_buf, &skipped);
250 printf("SPI flash failed in %s step\n", err_oper);
254 delta = get_timer(start_time);
255 printf("%zu bytes written, %zu bytes skipped", len - skipped,
257 printf(" in %ld.%lds, speed %ld B/s\n",
258 delta / 1000, delta % 1000, bytes_per_second(len, start_time));
263 static int do_spi_flash_read_write(int argc, char * const argv[])
270 loff_t offset, len, maxsize;
275 addr = simple_strtoul(argv[1], &endp, 16);
276 if (*argv[1] == 0 || *endp != 0)
279 if (mtd_arg_off_size(argc - 2, &argv[2], &dev, &offset, &len,
280 &maxsize, MTD_DEV_TYPE_NOR, flash->size))
283 /* Consistency checking */
284 if (offset + len > flash->size) {
285 printf("ERROR: attempting %s past flash size (%#x)\n",
286 argv[0], flash->size);
290 buf = map_physmem(addr, len, MAP_WRBACK);
292 puts("Failed to map physical memory\n");
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) {
302 read = strncmp(argv[0], "read", 4) == 0;
304 ret = spi_flash_read(flash, offset, len, buf);
306 ret = spi_flash_write(flash, offset, len, buf);
308 printf("SF: %zu bytes @ %#x %s: ", (size_t)len, (u32)offset,
309 read ? "Read" : "Written");
311 printf("ERROR %d\n", ret);
316 unmap_physmem(buf, len);
318 return ret == 0 ? 0 : 1;
321 static int do_spi_flash_erase(int argc, char * const argv[])
325 loff_t offset, len, maxsize;
331 if (mtd_arg_off(argv[1], &dev, &offset, &len, &maxsize,
332 MTD_DEV_TYPE_NOR, flash->size))
335 ret = sf_parse_len_arg(argv[2], &size);
339 /* Consistency checking */
340 if (offset + size > flash->size) {
341 printf("ERROR: attempting %s past flash size (%#x)\n",
342 argv[0], flash->size);
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");
350 return ret == 0 ? 0 : 1;
353 static int do_spi_protect(int argc, char * const argv[])
362 if (!str2off(argv[2], &start)) {
363 puts("start sector is not a valid number\n");
367 if (!str2off(argv[3], &len)) {
368 puts("len is not a valid number\n");
372 if (strcmp(argv[1], "lock") == 0)
374 else if (strcmp(argv[1], "unlock") == 0)
377 return -1; /* Unknown parameter */
379 ret = spi_flash_protect(flash, start, len, prot);
381 return ret == 0 ? 0 : 1;
384 #ifdef CONFIG_CMD_SF_TEST
394 static char *stage_name[STAGE_COUNT] = {
405 unsigned time_ms[STAGE_COUNT];
408 static void show_time(struct test_info *test, int stage)
410 uint64_t speed; /* KiB/s */
411 int bps; /* Bits per second */
413 speed = (long long)test->bytes * 1000;
414 if (test->time_ms[stage])
415 do_div(speed, test->time_ms[stage] * 1024);
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);
423 static void spi_test_next_stage(struct test_info *test)
425 test->time_ms[test->stage] = get_timer(test->base_ms);
426 show_time(test, test->stage);
427 test->base_ms = get_timer(0);
432 * Run a test on the SPI flash
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
441 static int spi_flash_test(struct spi_flash *flash, uint8_t *buf, ulong len,
442 ulong offset, uint8_t *vbuf)
444 struct test_info test;
447 printf("SPI flash test:\n");
448 memset(&test, '\0', sizeof(test));
449 test.base_ms = get_timer(0);
451 if (spi_flash_erase(flash, offset, len)) {
452 printf("Erase failed\n");
455 spi_test_next_stage(&test);
457 if (spi_flash_read(flash, offset, len, vbuf)) {
458 printf("Check read failed\n");
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);
469 spi_test_next_stage(&test);
471 if (spi_flash_write(flash, offset, len, buf)) {
472 printf("Write failed\n");
475 memset(vbuf, '\0', len);
476 spi_test_next_stage(&test);
478 if (spi_flash_read(flash, offset, len, vbuf)) {
479 printf("Read failed\n");
482 spi_test_next_stage(&test);
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);
495 printf("Test passed\n");
496 for (i = 0; i < STAGE_COUNT; i++)
502 static int do_spi_flash_test(int argc, char * const argv[])
504 unsigned long offset;
513 offset = simple_strtoul(argv[1], &endp, 16);
514 if (*argv[1] == 0 || *endp != 0)
516 len = simple_strtoul(argv[2], &endp, 16);
517 if (*argv[2] == 0 || *endp != 0)
520 vbuf = memalign(ARCH_DMA_MINALIGN, len);
522 printf("Cannot allocate memory (%lu bytes)\n", len);
525 buf = memalign(ARCH_DMA_MINALIGN, len);
528 printf("Cannot allocate memory (%lu bytes)\n", len);
532 from = map_sysmem(CONFIG_SYS_TEXT_BASE, 0);
533 memcpy(buf, from, len);
534 ret = spi_flash_test(flash, buf, len, offset, vbuf);
538 printf("Test failed\n");
544 #endif /* CONFIG_CMD_SF_TEST */
546 static int do_spi_flash(cmd_tbl_t *cmdtp, int flag, int argc,
552 /* need at least two arguments */
560 if (strcmp(cmd, "probe") == 0) {
561 ret = do_spi_flash_probe(argc, argv);
565 /* The remaining commands require a selected device */
567 puts("No SPI flash selected. Please run `sf probe'\n");
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);
590 return CMD_RET_USAGE;
593 #ifdef CONFIG_CMD_SF_TEST
594 #define SF_TEST_HELP "\nsf test offset len " \
595 "- run a very basic destructive test"
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"
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"