2 * Command for accessing SPI flash.
4 * Copyright (C) 2008 Atmel Corporation
5 * Licensed under the GPL-2 or later.
11 #include <spi_flash.h>
15 #ifndef CONFIG_SF_DEFAULT_SPEED
16 # define CONFIG_SF_DEFAULT_SPEED 1000000
18 #ifndef CONFIG_SF_DEFAULT_MODE
19 # define CONFIG_SF_DEFAULT_MODE SPI_MODE_3
21 #ifndef CONFIG_SF_DEFAULT_CS
22 # define CONFIG_SF_DEFAULT_CS 0
24 #ifndef CONFIG_SF_DEFAULT_BUS
25 # define CONFIG_SF_DEFAULT_BUS 0
28 static struct spi_flash *flash;
32 * This function computes the length argument for the erase command.
33 * The length on which the command is to operate can be given in two forms:
34 * 1. <cmd> offset len - operate on <'offset', 'len')
35 * 2. <cmd> offset +len - operate on <'offset', 'round_up(len)')
36 * If the second form is used and the length doesn't fall on the
37 * sector boundary, than it will be adjusted to the next sector boundary.
38 * If it isn't in the flash, the function will fail (return -1).
40 * arg: length specification (i.e. both command arguments)
42 * len: computed length for operation
45 * -1: failure (bad format, bad address).
47 static int sf_parse_len_arg(char *arg, ulong *len)
50 char round_up_len; /* indicates if the "+length" form used */
59 len_arg = simple_strtoul(arg, &ep, 16);
60 if (ep == arg || *ep != '\0')
63 if (round_up_len && flash->sector_size > 0)
64 *len = ROUND(len_arg, flash->sector_size);
72 * This function takes a byte length and a delta unit of time to compute the
73 * approximate bytes per second
75 * @param len amount of bytes currently processed
76 * @param start_ms start time of processing in ms
77 * @return bytes per second if OK, 0 on error
79 static ulong bytes_per_second(unsigned int len, ulong start_ms)
81 /* less accurate but avoids overflow */
82 if (len >= ((unsigned int) -1) / 1024)
83 return len / (max(get_timer(start_ms) / 1024, 1));
85 return 1024 * len / max(get_timer(start_ms), 1);
88 static int do_spi_flash_probe(int argc, char * const argv[])
90 unsigned int bus = CONFIG_SF_DEFAULT_BUS;
91 unsigned int cs = CONFIG_SF_DEFAULT_CS;
92 unsigned int speed = CONFIG_SF_DEFAULT_SPEED;
93 unsigned int mode = CONFIG_SF_DEFAULT_MODE;
95 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 new = spi_flash_probe(bus, cs, speed, mode);
125 printf("Failed to initialize SPI flash at %u:%u\n", bus, cs);
130 spi_flash_free(flash);
137 * Write a block of data to SPI flash, first checking if it is different from
138 * what is already there.
140 * If the data being written is the same, then *skipped is incremented by len.
142 * @param flash flash context pointer
143 * @param offset flash offset to write
144 * @param len number of bytes to write
145 * @param buf buffer to write from
146 * @param cmp_buf read buffer to use to compare data
147 * @param skipped Count of skipped data (incremented by this function)
148 * @return NULL if OK, else a string containing the stage which failed
150 static const char *spi_flash_update_block(struct spi_flash *flash, u32 offset,
151 size_t len, const char *buf, char *cmp_buf, size_t *skipped)
153 debug("offset=%#x, sector_size=%#x, len=%#zx\n",
154 offset, flash->sector_size, len);
155 if (spi_flash_read(flash, offset, len, cmp_buf))
157 if (memcmp(cmp_buf, buf, len) == 0) {
158 debug("Skip region %x size %zx: no change\n",
163 /* Erase the entire sector */
164 if (spi_flash_erase(flash, offset, flash->sector_size))
166 if (spi_flash_write(flash, offset, len, buf))
172 * Update an area of SPI flash by erasing and writing any blocks which need
173 * to change. Existing blocks with the correct data are left unchanged.
175 * @param flash flash context pointer
176 * @param offset flash offset to write
177 * @param len number of bytes to write
178 * @param buf buffer to write from
179 * @return 0 if ok, 1 on error
181 static int spi_flash_update(struct spi_flash *flash, u32 offset,
182 size_t len, const char *buf)
184 const char *err_oper = NULL;
186 const char *end = buf + len;
187 size_t todo; /* number of bytes to do in this pass */
188 size_t skipped = 0; /* statistics */
189 const ulong start_time = get_timer(0);
191 const char *start_buf = buf;
194 if (end - buf >= 200)
195 scale = (end - buf) / 100;
196 cmp_buf = malloc(flash->sector_size);
198 ulong last_update = get_timer(0);
200 for (; buf < end && !err_oper; buf += todo, offset += todo) {
201 todo = min(end - buf, flash->sector_size);
202 if (get_timer(last_update) > 100) {
203 printf(" \rUpdating, %zu%% %lu B/s",
204 100 - (end - buf) / scale,
205 bytes_per_second(buf - start_buf,
207 last_update = get_timer(0);
209 err_oper = spi_flash_update_block(flash, offset, todo,
210 buf, cmp_buf, &skipped);
218 printf("SPI flash failed in %s step\n", err_oper);
222 delta = get_timer(start_time);
223 printf("%zu bytes written, %zu bytes skipped", len - skipped,
225 printf(" in %ld.%lds, speed %ld B/s\n",
226 delta / 1000, delta % 1000, bytes_per_second(len, start_time));
231 static int do_spi_flash_read_write(int argc, char * const argv[])
234 unsigned long offset;
243 addr = simple_strtoul(argv[1], &endp, 16);
244 if (*argv[1] == 0 || *endp != 0)
246 offset = simple_strtoul(argv[2], &endp, 16);
247 if (*argv[2] == 0 || *endp != 0)
249 len = simple_strtoul(argv[3], &endp, 16);
250 if (*argv[3] == 0 || *endp != 0)
253 /* Consistency checking */
254 if (offset + len > flash->size) {
255 printf("ERROR: attempting %s past flash size (%#x)\n",
256 argv[0], flash->size);
260 buf = map_physmem(addr, len, MAP_WRBACK);
262 puts("Failed to map physical memory\n");
266 if (strcmp(argv[0], "update") == 0) {
267 ret = spi_flash_update(flash, offset, len, buf);
268 } else if (strncmp(argv[0], "read", 4) == 0 ||
269 strncmp(argv[0], "write", 5) == 0) {
272 read = strncmp(argv[0], "read", 4) == 0;
274 ret = spi_flash_read(flash, offset, len, buf);
276 ret = spi_flash_write(flash, offset, len, buf);
278 printf("SF: %zu bytes @ %#x %s: %s\n", (size_t)len, (u32)offset,
279 read ? "Read" : "Written", ret ? "ERROR" : "OK");
282 unmap_physmem(buf, len);
284 return ret == 0 ? 0 : 1;
287 static int do_spi_flash_erase(int argc, char * const argv[])
289 unsigned long offset;
297 offset = simple_strtoul(argv[1], &endp, 16);
298 if (*argv[1] == 0 || *endp != 0)
301 ret = sf_parse_len_arg(argv[2], &len);
305 /* Consistency checking */
306 if (offset + len > flash->size) {
307 printf("ERROR: attempting %s past flash size (%#x)\n",
308 argv[0], flash->size);
312 ret = spi_flash_erase(flash, offset, len);
313 printf("SF: %zu bytes @ %#x Erased: %s\n", (size_t)len, (u32)offset,
314 ret ? "ERROR" : "OK");
316 return ret == 0 ? 0 : 1;
319 #ifdef CONFIG_CMD_SF_TEST
329 static char *stage_name[STAGE_COUNT] = {
340 unsigned time_ms[STAGE_COUNT];
343 static void show_time(struct test_info *test, int stage)
345 uint64_t speed; /* KiB/s */
346 int bps; /* Bits per second */
348 speed = (long long)test->bytes * 1000;
349 do_div(speed, test->time_ms[stage] * 1024);
352 printf("%d %s: %d ticks, %d KiB/s %d.%03d Mbps\n", stage,
353 stage_name[stage], test->time_ms[stage],
354 (int)speed, bps / 1000, bps % 1000);
357 static void spi_test_next_stage(struct test_info *test)
359 test->time_ms[test->stage] = get_timer(test->base_ms);
360 show_time(test, test->stage);
361 test->base_ms = get_timer(0);
366 * Run a test on the SPI flash
368 * @param flash SPI flash to use
369 * @param buf Source buffer for data to write
370 * @param len Size of data to read/write
371 * @param offset Offset within flash to check
372 * @param vbuf Verification buffer
373 * @return 0 if ok, -1 on error
375 static int spi_flash_test(struct spi_flash *flash, uint8_t *buf, ulong len,
376 ulong offset, uint8_t *vbuf)
378 struct test_info test;
381 printf("SPI flash test:\n");
382 memset(&test, '\0', sizeof(test));
383 test.base_ms = get_timer(0);
385 if (spi_flash_erase(flash, offset, len)) {
386 printf("Erase failed\n");
389 spi_test_next_stage(&test);
391 if (spi_flash_read(flash, offset, len, vbuf)) {
392 printf("Check read failed\n");
395 for (i = 0; i < len; i++) {
396 if (vbuf[i] != 0xff) {
397 printf("Check failed at %d\n", i);
398 print_buffer(i, vbuf + i, 1, min(len - i, 0x40), 0);
402 spi_test_next_stage(&test);
404 if (spi_flash_write(flash, offset, len, buf)) {
405 printf("Write failed\n");
408 memset(vbuf, '\0', len);
409 spi_test_next_stage(&test);
411 if (spi_flash_read(flash, offset, len, vbuf)) {
412 printf("Read failed\n");
415 spi_test_next_stage(&test);
417 for (i = 0; i < len; i++) {
418 if (buf[i] != vbuf[i]) {
419 printf("Verify failed at %d, good data:\n", i);
420 print_buffer(i, buf + i, 1, min(len - i, 0x40), 0);
421 printf("Bad data:\n");
422 print_buffer(i, vbuf + i, 1, min(len - i, 0x40), 0);
426 printf("Test passed\n");
427 for (i = 0; i < STAGE_COUNT; i++)
433 static int do_spi_flash_test(int argc, char * const argv[])
435 unsigned long offset;
437 uint8_t *buf = (uint8_t *)CONFIG_SYS_TEXT_BASE;
442 offset = simple_strtoul(argv[1], &endp, 16);
443 if (*argv[1] == 0 || *endp != 0)
445 len = simple_strtoul(argv[2], &endp, 16);
446 if (*argv[2] == 0 || *endp != 0)
451 printf("Cannot allocate memory\n");
457 printf("Cannot allocate memory\n");
461 memcpy(buf, (char *)CONFIG_SYS_TEXT_BASE, len);
462 ret = spi_flash_test(flash, buf, len, offset, vbuf);
466 printf("Test failed\n");
472 #endif /* CONFIG_CMD_SF_TEST */
474 static int do_spi_flash(cmd_tbl_t *cmdtp, int flag, int argc,
480 /* need at least two arguments */
488 if (strcmp(cmd, "probe") == 0) {
489 ret = do_spi_flash_probe(argc, argv);
493 /* The remaining commands require a selected device */
495 puts("No SPI flash selected. Please run `sf probe'\n");
499 if (strcmp(cmd, "read") == 0 || strcmp(cmd, "write") == 0 ||
500 strcmp(cmd, "update") == 0)
501 ret = do_spi_flash_read_write(argc, argv);
502 else if (strcmp(cmd, "erase") == 0)
503 ret = do_spi_flash_erase(argc, argv);
504 #ifdef CONFIG_CMD_SF_TEST
505 else if (!strcmp(cmd, "test"))
506 ret = do_spi_flash_test(argc, argv);
516 return CMD_RET_USAGE;
519 #ifdef CONFIG_CMD_SF_TEST
520 #define SF_TEST_HELP "\nsf test offset len " \
521 "- run a very basic destructive test"
527 sf, 5, 1, do_spi_flash,
528 "SPI flash sub-system",
529 "probe [[bus:]cs] [hz] [mode] - init flash device on given SPI bus\n"
531 "sf read addr offset len - read `len' bytes starting at\n"
532 " `offset' to memory at `addr'\n"
533 "sf write addr offset len - write `len' bytes from memory\n"
534 " at `addr' to flash at `offset'\n"
535 "sf erase offset [+]len - erase `len' bytes from `offset'\n"
536 " `+len' round up `len' to block size\n"
537 "sf update addr offset len - erase and write `len' bytes from memory\n"
538 " at `addr' to flash at `offset'"