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cmd/sf.c
14.5 KB
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// SPDX-License-Identifier: GPL-2.0+ |
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/* * Command for accessing SPI flash. * * Copyright (C) 2008 Atmel Corporation */ |
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#include <common.h> |
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#include <div64.h> |
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#include <dm.h> |
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#include <malloc.h> |
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#include <mapmem.h> |
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#include <spi.h> |
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#include <spi_flash.h> |
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#include <jffs2/jffs2.h> #include <linux/mtd/mtd.h> |
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#include <asm/io.h> |
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#include <dm/device-internal.h> |
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#include "legacy-mtd-utils.h" |
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static struct spi_flash *flash; |
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/* * This function computes the length argument for the erase command. * The length on which the command is to operate can be given in two forms: * 1. <cmd> offset len - operate on <'offset', 'len') * 2. <cmd> offset +len - operate on <'offset', 'round_up(len)') * If the second form is used and the length doesn't fall on the * sector boundary, than it will be adjusted to the next sector boundary. * If it isn't in the flash, the function will fail (return -1). * Input: * arg: length specification (i.e. both command arguments) * Output: * len: computed length for operation * Return: * 1: success * -1: failure (bad format, bad address). */ static int sf_parse_len_arg(char *arg, ulong *len) { char *ep; char round_up_len; /* indicates if the "+length" form used */ ulong len_arg; round_up_len = 0; if (*arg == '+') { round_up_len = 1; ++arg; } len_arg = simple_strtoul(arg, &ep, 16); if (ep == arg || *ep != '\0') return -1; if (round_up_len && flash->sector_size > 0) |
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*len = ROUND(len_arg, flash->sector_size); |
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else *len = len_arg; return 1; } |
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/** * This function takes a byte length and a delta unit of time to compute the * approximate bytes per second * * @param len amount of bytes currently processed * @param start_ms start time of processing in ms * @return bytes per second if OK, 0 on error */ static ulong bytes_per_second(unsigned int len, ulong start_ms) { /* less accurate but avoids overflow */ if (len >= ((unsigned int) -1) / 1024) |
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return len / (max(get_timer(start_ms) / 1024, 1UL)); |
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else |
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return 1024 * len / max(get_timer(start_ms), 1UL); |
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} |
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static int do_spi_flash_probe(int argc, char * const argv[]) |
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{ |
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unsigned int bus = CONFIG_SF_DEFAULT_BUS; unsigned int cs = CONFIG_SF_DEFAULT_CS; |
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/* In DM mode, defaults speed and mode will be taken from DT */ |
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unsigned int speed = CONFIG_SF_DEFAULT_SPEED; unsigned int mode = CONFIG_SF_DEFAULT_MODE; char *endp; |
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#ifdef CONFIG_DM_SPI_FLASH struct udevice *new, *bus_dev; int ret; #else |
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struct spi_flash *new; |
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#endif |
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if (argc >= 2) { cs = simple_strtoul(argv[1], &endp, 0); if (*argv[1] == 0 || (*endp != 0 && *endp != ':')) |
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return -1; |
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if (*endp == ':') { if (endp[1] == 0) return -1; bus = cs; cs = simple_strtoul(endp + 1, &endp, 0); if (*endp != 0) return -1; } |
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} if (argc >= 3) { speed = simple_strtoul(argv[2], &endp, 0); if (*argv[2] == 0 || *endp != 0) |
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return -1; |
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} if (argc >= 4) { |
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mode = simple_strtoul(argv[3], &endp, 16); |
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if (*argv[3] == 0 || *endp != 0) |
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return -1; |
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} |
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#ifdef CONFIG_DM_SPI_FLASH /* Remove the old device, otherwise probe will just be a nop */ ret = spi_find_bus_and_cs(bus, cs, &bus_dev, &new); if (!ret) { |
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device_remove(new, DM_REMOVE_NORMAL); |
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} flash = NULL; ret = spi_flash_probe_bus_cs(bus, cs, speed, mode, &new); if (ret) { printf("Failed to initialize SPI flash at %u:%u (error %d) ", bus, cs, ret); return 1; } |
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flash = dev_get_uclass_priv(new); |
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#else |
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if (flash) spi_flash_free(flash); |
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new = spi_flash_probe(bus, cs, speed, mode); |
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flash = new; |
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if (!new) { printf("Failed to initialize SPI flash at %u:%u ", bus, cs); return 1; } |
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flash = new; |
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#endif |
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return 0; |
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} |
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/** * Write a block of data to SPI flash, first checking if it is different from * what is already there. * * If the data being written is the same, then *skipped is incremented by len. * * @param flash flash context pointer * @param offset flash offset to write * @param len number of bytes to write * @param buf buffer to write from * @param cmp_buf read buffer to use to compare data * @param skipped Count of skipped data (incremented by this function) * @return NULL if OK, else a string containing the stage which failed */ static const char *spi_flash_update_block(struct spi_flash *flash, u32 offset, size_t len, const char *buf, char *cmp_buf, size_t *skipped) { |
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char *ptr = (char *)buf; |
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debug("offset=%#x, sector_size=%#x, len=%#zx ", |
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offset, flash->sector_size, len); |
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/* Read the entire sector so to allow for rewriting */ if (spi_flash_read(flash, offset, flash->sector_size, cmp_buf)) |
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return "read"; |
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/* Compare only what is meaningful (len) */ |
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if (memcmp(cmp_buf, buf, len) == 0) { |
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debug("Skip region %x size %zx: no change ", |
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offset, len); |
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*skipped += len; return NULL; } |
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/* Erase the entire sector */ if (spi_flash_erase(flash, offset, flash->sector_size)) |
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return "erase"; |
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/* If it's a partial sector, copy the data into the temp-buffer */ |
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if (len != flash->sector_size) { |
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memcpy(cmp_buf, buf, len); ptr = cmp_buf; |
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} |
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/* Write one complete sector */ if (spi_flash_write(flash, offset, flash->sector_size, ptr)) return "write"; |
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return NULL; } /** * Update an area of SPI flash by erasing and writing any blocks which need * to change. Existing blocks with the correct data are left unchanged. * * @param flash flash context pointer * @param offset flash offset to write * @param len number of bytes to write * @param buf buffer to write from * @return 0 if ok, 1 on error */ static int spi_flash_update(struct spi_flash *flash, u32 offset, size_t len, const char *buf) { const char *err_oper = NULL; char *cmp_buf; const char *end = buf + len; size_t todo; /* number of bytes to do in this pass */ |
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size_t skipped = 0; /* statistics */ |
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const ulong start_time = get_timer(0); size_t scale = 1; const char *start_buf = buf; ulong delta; |
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if (end - buf >= 200) scale = (end - buf) / 100; |
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cmp_buf = memalign(ARCH_DMA_MINALIGN, flash->sector_size); |
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if (cmp_buf) { |
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ulong last_update = get_timer(0); |
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for (; buf < end && !err_oper; buf += todo, offset += todo) { |
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todo = min_t(size_t, end - buf, flash->sector_size); |
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if (get_timer(last_update) > 100) { printf(" \rUpdating, %zu%% %lu B/s", |
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100 - (end - buf) / scale, |
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bytes_per_second(buf - start_buf, start_time)); last_update = get_timer(0); } |
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err_oper = spi_flash_update_block(flash, offset, todo, buf, cmp_buf, &skipped); } } else { err_oper = "malloc"; } free(cmp_buf); |
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putc('\r'); |
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if (err_oper) { printf("SPI flash failed in %s step ", err_oper); return 1; } |
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delta = get_timer(start_time); printf("%zu bytes written, %zu bytes skipped", len - skipped, |
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skipped); |
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printf(" in %ld.%lds, speed %ld B/s ", |
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delta / 1000, delta % 1000, bytes_per_second(len, start_time)); |
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return 0; } |
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static int do_spi_flash_read_write(int argc, char * const argv[]) |
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{ unsigned long addr; |
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void *buf; char *endp; |
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int ret = 1; |
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int dev = 0; loff_t offset, len, maxsize; |
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if (argc < 3) |
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return -1; |
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addr = simple_strtoul(argv[1], &endp, 16); if (*argv[1] == 0 || *endp != 0) |
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return -1; |
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if (mtd_arg_off_size(argc - 2, &argv[2], &dev, &offset, &len, &maxsize, MTD_DEV_TYPE_NOR, flash->size)) |
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return -1; |
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/* Consistency checking */ if (offset + len > flash->size) { printf("ERROR: attempting %s past flash size (%#x) ", |
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argv[0], flash->size); |
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return 1; } |
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buf = map_physmem(addr, len, MAP_WRBACK); |
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if (!buf && addr) { |
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puts("Failed to map physical memory "); return 1; } |
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if (strcmp(argv[0], "update") == 0) { |
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ret = spi_flash_update(flash, offset, len, buf); |
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} else if (strncmp(argv[0], "read", 4) == 0 || |
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strncmp(argv[0], "write", 5) == 0) { int read; read = strncmp(argv[0], "read", 4) == 0; if (read) ret = spi_flash_read(flash, offset, len, buf); else ret = spi_flash_write(flash, offset, len, buf); |
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printf("SF: %zu bytes @ %#x %s: ", (size_t)len, (u32)offset, read ? "Read" : "Written"); if (ret) printf("ERROR %d ", ret); else printf("OK "); |
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} |
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unmap_physmem(buf, len); |
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return ret == 0 ? 0 : 1; |
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} |
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static int do_spi_flash_erase(int argc, char * const argv[]) |
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{ |
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int ret; |
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int dev = 0; loff_t offset, len, maxsize; ulong size; |
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if (argc < 3) |
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return -1; |
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if (mtd_arg_off(argv[1], &dev, &offset, &len, &maxsize, MTD_DEV_TYPE_NOR, flash->size)) |
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return -1; |
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ret = sf_parse_len_arg(argv[2], &size); |
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if (ret != 1) |
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return -1; |
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/* Consistency checking */ |
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if (offset + size > flash->size) { |
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printf("ERROR: attempting %s past flash size (%#x) ", |
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argv[0], flash->size); |
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return 1; } |
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ret = spi_flash_erase(flash, offset, size); printf("SF: %zu bytes @ %#x Erased: %s ", (size_t)size, (u32)offset, |
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ret ? "ERROR" : "OK"); |
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return ret == 0 ? 0 : 1; |
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} |
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static int do_spi_protect(int argc, char * const argv[]) { int ret = 0; loff_t start, len; bool prot = false; if (argc != 4) return -1; if (!str2off(argv[2], &start)) { puts("start sector is not a valid number "); return 1; } if (!str2off(argv[3], &len)) { puts("len is not a valid number "); return 1; } if (strcmp(argv[1], "lock") == 0) prot = true; else if (strcmp(argv[1], "unlock") == 0) prot = false; else return -1; /* Unknown parameter */ ret = spi_flash_protect(flash, start, len, prot); return ret == 0 ? 0 : 1; } |
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#ifdef CONFIG_CMD_SF_TEST enum { STAGE_ERASE, STAGE_CHECK, STAGE_WRITE, STAGE_READ, STAGE_COUNT, }; static char *stage_name[STAGE_COUNT] = { "erase", "check", "write", "read", }; struct test_info { int stage; int bytes; unsigned base_ms; unsigned time_ms[STAGE_COUNT]; }; static void show_time(struct test_info *test, int stage) { uint64_t speed; /* KiB/s */ int bps; /* Bits per second */ speed = (long long)test->bytes * 1000; |
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if (test->time_ms[stage]) do_div(speed, test->time_ms[stage] * 1024); |
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bps = speed * 8; |
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printf("%d %s: %u ticks, %d KiB/s %d.%03d Mbps ", stage, |
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stage_name[stage], test->time_ms[stage], (int)speed, bps / 1000, bps % 1000); } static void spi_test_next_stage(struct test_info *test) { test->time_ms[test->stage] = get_timer(test->base_ms); show_time(test, test->stage); test->base_ms = get_timer(0); test->stage++; } /** * Run a test on the SPI flash * * @param flash SPI flash to use * @param buf Source buffer for data to write * @param len Size of data to read/write * @param offset Offset within flash to check * @param vbuf Verification buffer * @return 0 if ok, -1 on error */ |
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static int spi_flash_test(struct spi_flash *flash, uint8_t *buf, ulong len, ulong offset, uint8_t *vbuf) |
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{ struct test_info test; int i; printf("SPI flash test: "); memset(&test, '\0', sizeof(test)); test.base_ms = get_timer(0); test.bytes = len; if (spi_flash_erase(flash, offset, len)) { printf("Erase failed "); return -1; } spi_test_next_stage(&test); if (spi_flash_read(flash, offset, len, vbuf)) { printf("Check read failed "); return -1; } for (i = 0; i < len; i++) { if (vbuf[i] != 0xff) { printf("Check failed at %d ", i); |
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print_buffer(i, vbuf + i, 1, min_t(uint, len - i, 0x40), 0); |
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return -1; } } spi_test_next_stage(&test); if (spi_flash_write(flash, offset, len, buf)) { printf("Write failed "); return -1; } memset(vbuf, '\0', len); spi_test_next_stage(&test); if (spi_flash_read(flash, offset, len, vbuf)) { printf("Read failed "); return -1; } spi_test_next_stage(&test); for (i = 0; i < len; i++) { if (buf[i] != vbuf[i]) { printf("Verify failed at %d, good data: ", i); |
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print_buffer(i, buf + i, 1, min_t(uint, len - i, 0x40), 0); |
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printf("Bad data: "); |
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print_buffer(i, vbuf + i, 1, min_t(uint, len - i, 0x40), 0); |
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return -1; } } printf("Test passed "); for (i = 0; i < STAGE_COUNT; i++) show_time(&test, i); return 0; } static int do_spi_flash_test(int argc, char * const argv[]) { unsigned long offset; unsigned long len; |
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uint8_t *buf, *from; |
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char *endp; |
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uint8_t *vbuf; |
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int ret; |
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if (argc < 3) return -1; |
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offset = simple_strtoul(argv[1], &endp, 16); if (*argv[1] == 0 || *endp != 0) return -1; len = simple_strtoul(argv[2], &endp, 16); if (*argv[2] == 0 || *endp != 0) return -1; |
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vbuf = memalign(ARCH_DMA_MINALIGN, len); |
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if (!vbuf) { |
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printf("Cannot allocate memory (%lu bytes) ", len); |
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return 1; } |
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buf = memalign(ARCH_DMA_MINALIGN, len); |
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if (!buf) { free(vbuf); |
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printf("Cannot allocate memory (%lu bytes) ", len); |
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return 1; } |
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from = map_sysmem(CONFIG_SYS_TEXT_BASE, 0); memcpy(buf, from, len); |
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ret = spi_flash_test(flash, buf, len, offset, vbuf); free(vbuf); free(buf); if (ret) { printf("Test failed "); return 1; } return 0; } #endif /* CONFIG_CMD_SF_TEST */ |
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static int do_spi_flash(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) |
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{ const char *cmd; |
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int ret; |
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/* need at least two arguments */ if (argc < 2) goto usage; cmd = argv[1]; |
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--argc; ++argv; |
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if (strcmp(cmd, "probe") == 0) { ret = do_spi_flash_probe(argc, argv); goto done; } |
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/* The remaining commands require a selected device */ if (!flash) { puts("No SPI flash selected. Please run `sf probe' "); return 1; } |
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if (strcmp(cmd, "read") == 0 || strcmp(cmd, "write") == 0 || strcmp(cmd, "update") == 0) |
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ret = do_spi_flash_read_write(argc, argv); else if (strcmp(cmd, "erase") == 0) ret = do_spi_flash_erase(argc, argv); |
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else if (strcmp(cmd, "protect") == 0) ret = do_spi_protect(argc, argv); |
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#ifdef CONFIG_CMD_SF_TEST else if (!strcmp(cmd, "test")) ret = do_spi_flash_test(argc, argv); #endif |
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else ret = -1; done: if (ret != -1) return ret; |
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usage: |
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return CMD_RET_USAGE; |
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} |
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#ifdef CONFIG_CMD_SF_TEST #define SF_TEST_HELP " sf test offset len " \ "- run a very basic destructive test" #else #define SF_TEST_HELP #endif |
b6368467e
|
599 600 |
U_BOOT_CMD( sf, 5, 1, do_spi_flash, |
2fb2604d5
|
601 |
"SPI flash sub-system", |
c1173bd07
|
602 603 |
"probe [[bus:]cs] [hz] [mode] - init flash device on given SPI bus " |
b6368467e
|
604 605 |
" and chip select " |
2ec1a4059
|
606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 |
"sf read addr offset|partition len - read `len' bytes starting at " " `offset' or from start of mtd " " `partition'to memory at `addr' " "sf write addr offset|partition len - write `len' bytes from memory " " at `addr' to flash at `offset' " " or to start of mtd `partition' " "sf erase offset|partition [+]len - erase `len' bytes from `offset' " " or from start of mtd `partition' " " `+len' round up `len' to block size " "sf update addr offset|partition len - erase and write `len' bytes from memory " " at `addr' to flash at `offset' " " or to start of mtd `partition' " |
c3c016cf7
|
630 631 632 633 |
"sf protect lock/unlock sector len - protect/unprotect 'len' bytes starting " " at address 'sector' " |
240072731
|
634 |
SF_TEST_HELP |
a89c33db9
|
635 |
); |