2 * Command for accessing SPI flash.
4 * Copyright (C) 2008 Atmel Corporation
6 * SPDX-License-Identifier: GPL-2.0+
12 #include <spi_flash.h>
16 #ifndef CONFIG_SF_DEFAULT_SPEED
17 # define CONFIG_SF_DEFAULT_SPEED 1000000
19 #ifndef CONFIG_SF_DEFAULT_MODE
20 # define CONFIG_SF_DEFAULT_MODE SPI_MODE_3
22 #ifndef CONFIG_SF_DEFAULT_CS
23 # define CONFIG_SF_DEFAULT_CS 0
25 #ifndef CONFIG_SF_DEFAULT_BUS
26 # define CONFIG_SF_DEFAULT_BUS 0
29 static struct spi_flash *flash;
33 * This function computes the length argument for the erase command.
34 * The length on which the command is to operate can be given in two forms:
35 * 1. <cmd> offset len - operate on <'offset', 'len')
36 * 2. <cmd> offset +len - operate on <'offset', 'round_up(len)')
37 * If the second form is used and the length doesn't fall on the
38 * sector boundary, than it will be adjusted to the next sector boundary.
39 * If it isn't in the flash, the function will fail (return -1).
41 * arg: length specification (i.e. both command arguments)
43 * len: computed length for operation
46 * -1: failure (bad format, bad address).
48 static int sf_parse_len_arg(char *arg, ulong *len)
51 char round_up_len; /* indicates if the "+length" form used */
60 len_arg = simple_strtoul(arg, &ep, 16);
61 if (ep == arg || *ep != '\0')
64 if (round_up_len && flash->sector_size > 0)
65 *len = ROUND(len_arg, flash->sector_size);
73 * This function takes a byte length and a delta unit of time to compute the
74 * approximate bytes per second
76 * @param len amount of bytes currently processed
77 * @param start_ms start time of processing in ms
78 * @return bytes per second if OK, 0 on error
80 static ulong bytes_per_second(unsigned int len, ulong start_ms)
82 /* less accurate but avoids overflow */
83 if (len >= ((unsigned int) -1) / 1024)
84 return len / (max(get_timer(start_ms) / 1024, 1));
86 return 1024 * len / max(get_timer(start_ms), 1);
89 static int do_spi_flash_probe(int argc, char * const argv[])
91 unsigned int bus = CONFIG_SF_DEFAULT_BUS;
92 unsigned int cs = CONFIG_SF_DEFAULT_CS;
93 unsigned int speed = CONFIG_SF_DEFAULT_SPEED;
94 unsigned int mode = CONFIG_SF_DEFAULT_MODE;
96 struct spi_flash *new;
99 cs = simple_strtoul(argv[1], &endp, 0);
100 if (*argv[1] == 0 || (*endp != 0 && *endp != ':'))
107 cs = simple_strtoul(endp + 1, &endp, 0);
114 speed = simple_strtoul(argv[2], &endp, 0);
115 if (*argv[2] == 0 || *endp != 0)
119 mode = simple_strtoul(argv[3], &endp, 16);
120 if (*argv[3] == 0 || *endp != 0)
124 new = spi_flash_probe(bus, cs, speed, mode);
126 printf("Failed to initialize SPI flash at %u:%u\n", bus, cs);
131 spi_flash_free(flash);
138 * Write a block of data to SPI flash, first checking if it is different from
139 * what is already there.
141 * If the data being written is the same, then *skipped is incremented by len.
143 * @param flash flash context pointer
144 * @param offset flash offset to write
145 * @param len number of bytes to write
146 * @param buf buffer to write from
147 * @param cmp_buf read buffer to use to compare data
148 * @param skipped Count of skipped data (incremented by this function)
149 * @return NULL if OK, else a string containing the stage which failed
151 static const char *spi_flash_update_block(struct spi_flash *flash, u32 offset,
152 size_t len, const char *buf, char *cmp_buf, size_t *skipped)
154 debug("offset=%#x, sector_size=%#x, len=%#zx\n",
155 offset, flash->sector_size, len);
156 /* Read the entire sector so to allow for rewriting */
157 if (spi_flash_read(flash, offset, flash->sector_size, cmp_buf))
159 /* Compare only what is meaningful (len) */
160 if (memcmp(cmp_buf, buf, len) == 0) {
161 debug("Skip region %x size %zx: no change\n",
166 /* Erase the entire sector */
167 if (spi_flash_erase(flash, offset, flash->sector_size))
169 /* Write the initial part of the block from the source */
170 if (spi_flash_write(flash, offset, len, buf))
172 /* If it's a partial sector, rewrite the existing part */
173 if (len != flash->sector_size) {
174 /* Rewrite the original data to the end of the sector */
175 if (spi_flash_write(flash, offset + len,
176 flash->sector_size - len, &cmp_buf[len]))
184 * Update an area of SPI flash by erasing and writing any blocks which need
185 * to change. Existing blocks with the correct data are left unchanged.
187 * @param flash flash context pointer
188 * @param offset flash offset to write
189 * @param len number of bytes to write
190 * @param buf buffer to write from
191 * @return 0 if ok, 1 on error
193 static int spi_flash_update(struct spi_flash *flash, u32 offset,
194 size_t len, const char *buf)
196 const char *err_oper = NULL;
198 const char *end = buf + len;
199 size_t todo; /* number of bytes to do in this pass */
200 size_t skipped = 0; /* statistics */
201 const ulong start_time = get_timer(0);
203 const char *start_buf = buf;
206 if (end - buf >= 200)
207 scale = (end - buf) / 100;
208 cmp_buf = malloc(flash->sector_size);
210 ulong last_update = get_timer(0);
212 for (; buf < end && !err_oper; buf += todo, offset += todo) {
213 todo = min(end - buf, flash->sector_size);
214 if (get_timer(last_update) > 100) {
215 printf(" \rUpdating, %zu%% %lu B/s",
216 100 - (end - buf) / scale,
217 bytes_per_second(buf - start_buf,
219 last_update = get_timer(0);
221 err_oper = spi_flash_update_block(flash, offset, todo,
222 buf, cmp_buf, &skipped);
230 printf("SPI flash failed in %s step\n", err_oper);
234 delta = get_timer(start_time);
235 printf("%zu bytes written, %zu bytes skipped", len - skipped,
237 printf(" in %ld.%lds, speed %ld B/s\n",
238 delta / 1000, delta % 1000, bytes_per_second(len, start_time));
243 static int do_spi_flash_read_write(int argc, char * const argv[])
246 unsigned long offset;
255 addr = simple_strtoul(argv[1], &endp, 16);
256 if (*argv[1] == 0 || *endp != 0)
258 offset = simple_strtoul(argv[2], &endp, 16);
259 if (*argv[2] == 0 || *endp != 0)
261 len = simple_strtoul(argv[3], &endp, 16);
262 if (*argv[3] == 0 || *endp != 0)
265 /* Consistency checking */
266 if (offset + len > flash->size) {
267 printf("ERROR: attempting %s past flash size (%#x)\n",
268 argv[0], flash->size);
272 buf = map_physmem(addr, len, MAP_WRBACK);
274 puts("Failed to map physical memory\n");
278 if (strcmp(argv[0], "update") == 0) {
279 ret = spi_flash_update(flash, offset, len, buf);
280 } else if (strncmp(argv[0], "read", 4) == 0 ||
281 strncmp(argv[0], "write", 5) == 0) {
284 read = strncmp(argv[0], "read", 4) == 0;
286 ret = spi_flash_read(flash, offset, len, buf);
288 ret = spi_flash_write(flash, offset, len, buf);
290 printf("SF: %zu bytes @ %#x %s: %s\n", (size_t)len, (u32)offset,
291 read ? "Read" : "Written", ret ? "ERROR" : "OK");
294 unmap_physmem(buf, len);
296 return ret == 0 ? 0 : 1;
299 static int do_spi_flash_erase(int argc, char * const argv[])
301 unsigned long offset;
309 offset = simple_strtoul(argv[1], &endp, 16);
310 if (*argv[1] == 0 || *endp != 0)
313 ret = sf_parse_len_arg(argv[2], &len);
317 /* Consistency checking */
318 if (offset + len > flash->size) {
319 printf("ERROR: attempting %s past flash size (%#x)\n",
320 argv[0], flash->size);
324 ret = spi_flash_erase(flash, offset, len);
325 printf("SF: %zu bytes @ %#x Erased: %s\n", (size_t)len, (u32)offset,
326 ret ? "ERROR" : "OK");
328 return ret == 0 ? 0 : 1;
331 #ifdef CONFIG_CMD_SF_TEST
341 static char *stage_name[STAGE_COUNT] = {
352 unsigned time_ms[STAGE_COUNT];
355 static void show_time(struct test_info *test, int stage)
357 uint64_t speed; /* KiB/s */
358 int bps; /* Bits per second */
360 speed = (long long)test->bytes * 1000;
361 do_div(speed, test->time_ms[stage] * 1024);
364 printf("%d %s: %d ticks, %d KiB/s %d.%03d Mbps\n", stage,
365 stage_name[stage], test->time_ms[stage],
366 (int)speed, bps / 1000, bps % 1000);
369 static void spi_test_next_stage(struct test_info *test)
371 test->time_ms[test->stage] = get_timer(test->base_ms);
372 show_time(test, test->stage);
373 test->base_ms = get_timer(0);
378 * Run a test on the SPI flash
380 * @param flash SPI flash to use
381 * @param buf Source buffer for data to write
382 * @param len Size of data to read/write
383 * @param offset Offset within flash to check
384 * @param vbuf Verification buffer
385 * @return 0 if ok, -1 on error
387 static int spi_flash_test(struct spi_flash *flash, uint8_t *buf, ulong len,
388 ulong offset, uint8_t *vbuf)
390 struct test_info test;
393 printf("SPI flash test:\n");
394 memset(&test, '\0', sizeof(test));
395 test.base_ms = get_timer(0);
397 if (spi_flash_erase(flash, offset, len)) {
398 printf("Erase failed\n");
401 spi_test_next_stage(&test);
403 if (spi_flash_read(flash, offset, len, vbuf)) {
404 printf("Check read failed\n");
407 for (i = 0; i < len; i++) {
408 if (vbuf[i] != 0xff) {
409 printf("Check failed at %d\n", i);
410 print_buffer(i, vbuf + i, 1, min(len - i, 0x40), 0);
414 spi_test_next_stage(&test);
416 if (spi_flash_write(flash, offset, len, buf)) {
417 printf("Write failed\n");
420 memset(vbuf, '\0', len);
421 spi_test_next_stage(&test);
423 if (spi_flash_read(flash, offset, len, vbuf)) {
424 printf("Read failed\n");
427 spi_test_next_stage(&test);
429 for (i = 0; i < len; i++) {
430 if (buf[i] != vbuf[i]) {
431 printf("Verify failed at %d, good data:\n", i);
432 print_buffer(i, buf + i, 1, min(len - i, 0x40), 0);
433 printf("Bad data:\n");
434 print_buffer(i, vbuf + i, 1, min(len - i, 0x40), 0);
438 printf("Test passed\n");
439 for (i = 0; i < STAGE_COUNT; i++)
445 static int do_spi_flash_test(int argc, char * const argv[])
447 unsigned long offset;
449 uint8_t *buf = (uint8_t *)CONFIG_SYS_TEXT_BASE;
454 offset = simple_strtoul(argv[1], &endp, 16);
455 if (*argv[1] == 0 || *endp != 0)
457 len = simple_strtoul(argv[2], &endp, 16);
458 if (*argv[2] == 0 || *endp != 0)
463 printf("Cannot allocate memory\n");
469 printf("Cannot allocate memory\n");
473 memcpy(buf, (char *)CONFIG_SYS_TEXT_BASE, len);
474 ret = spi_flash_test(flash, buf, len, offset, vbuf);
478 printf("Test failed\n");
484 #endif /* CONFIG_CMD_SF_TEST */
486 static int do_spi_flash(cmd_tbl_t *cmdtp, int flag, int argc,
492 /* need at least two arguments */
500 if (strcmp(cmd, "probe") == 0) {
501 ret = do_spi_flash_probe(argc, argv);
505 /* The remaining commands require a selected device */
507 puts("No SPI flash selected. Please run `sf probe'\n");
511 if (strcmp(cmd, "read") == 0 || strcmp(cmd, "write") == 0 ||
512 strcmp(cmd, "update") == 0)
513 ret = do_spi_flash_read_write(argc, argv);
514 else if (strcmp(cmd, "erase") == 0)
515 ret = do_spi_flash_erase(argc, argv);
516 #ifdef CONFIG_CMD_SF_TEST
517 else if (!strcmp(cmd, "test"))
518 ret = do_spi_flash_test(argc, argv);
528 return CMD_RET_USAGE;
531 #ifdef CONFIG_CMD_SF_TEST
532 #define SF_TEST_HELP "\nsf test offset len " \
533 "- run a very basic destructive test"
539 sf, 5, 1, do_spi_flash,
540 "SPI flash sub-system",
541 "probe [[bus:]cs] [hz] [mode] - init flash device on given SPI bus\n"
543 "sf read addr offset len - read `len' bytes starting at\n"
544 " `offset' to memory at `addr'\n"
545 "sf write addr offset len - write `len' bytes from memory\n"
546 " at `addr' to flash at `offset'\n"
547 "sf erase offset [+]len - erase `len' bytes from `offset'\n"
548 " `+len' round up `len' to block size\n"
549 "sf update addr offset len - erase and write `len' bytes from memory\n"
550 " at `addr' to flash at `offset'"