/* * Command for accessing SPI flash. * * Copyright (C) 2008 Atmel Corporation */ #include <common.h> #include <spi_flash.h> #include <asm/io.h> #ifndef CONFIG_SF_DEFAULT_SPEED # define CONFIG_SF_DEFAULT_SPEED 1000000 #endif #ifndef CONFIG_SF_DEFAULT_MODE # define CONFIG_SF_DEFAULT_MODE SPI_MODE_3 #endif static struct spi_flash *flash; static int do_spi_flash_probe(int argc, char *argv[]) { unsigned int bus = 0; unsigned int cs; unsigned int speed = CONFIG_SF_DEFAULT_SPEED; unsigned int mode = CONFIG_SF_DEFAULT_MODE; char *endp; struct spi_flash *new; if (argc < 2) goto usage; cs = simple_strtoul(argv[1], &endp, 0); if (*argv[1] == 0 || (*endp != 0 && *endp != ':')) goto usage; if (*endp == ':') { if (endp[1] == 0) goto usage; bus = cs; cs = simple_strtoul(endp + 1, &endp, 0); if (*endp != 0) goto usage; } if (argc >= 3) { speed = simple_strtoul(argv[2], &endp, 0); if (*argv[2] == 0 || *endp != 0) goto usage; } if (argc >= 4) { mode = simple_strtoul(argv[3], &endp, 16); if (*argv[3] == 0 || *endp != 0) goto usage; } new = spi_flash_probe(bus, cs, speed, mode); if (!new) { printf("Failed to initialize SPI flash at %u:%u\n", bus, cs); return 1; } if (flash) spi_flash_free(flash); flash = new; printf("%u KiB %s at %u:%u is now current device\n", flash->size >> 10, flash->name, bus, cs); return 0; usage: puts("Usage: sf probe [bus:]cs [hz] [mode]\n"); return 1; } static int do_spi_flash_read_write(int argc, char *argv[]) { unsigned long addr; unsigned long offset; unsigned long len; void *buf; char *endp; int ret; if (argc < 4) goto usage; addr = simple_strtoul(argv[1], &endp, 16); if (*argv[1] == 0 || *endp != 0) goto usage; offset = simple_strtoul(argv[2], &endp, 16); if (*argv[2] == 0 || *endp != 0) goto usage; len = simple_strtoul(argv[3], &endp, 16); if (*argv[3] == 0 || *endp != 0) goto usage; buf = map_physmem(addr, len, MAP_WRBACK); if (!buf) { puts("Failed to map physical memory\n"); return 1; } if (strcmp(argv[0], "read") == 0) ret = spi_flash_read(flash, offset, len, buf); else ret = spi_flash_write(flash, offset, len, buf); unmap_physmem(buf, len); if (ret) { printf("SPI flash %s failed\n", argv[0]); return 1; } return 0; usage: printf("Usage: sf %s addr offset len\n", argv[0]); return 1; } static int do_spi_flash_erase(int argc, char *argv[]) { unsigned long offset; unsigned long len; char *endp; int ret; if (argc < 3) goto usage; offset = simple_strtoul(argv[1], &endp, 16); if (*argv[1] == 0 || *endp != 0) goto usage; len = simple_strtoul(argv[2], &endp, 16); if (*argv[2] == 0 || *endp != 0) goto usage; ret = spi_flash_erase(flash, offset, len); if (ret) { printf("SPI flash %s failed\n", argv[0]); return 1; } return 0; usage: puts("Usage: sf erase offset len\n"); return 1; } static int do_spi_flash(cmd_tbl_t *cmdtp, int flag, int argc, char *argv[]) { const char *cmd; /* need at least two arguments */ if (argc < 2) goto usage; cmd = argv[1]; if (strcmp(cmd, "probe") == 0) return do_spi_flash_probe(argc - 1, argv + 1); /* The remaining commands require a selected device */ if (!flash) { puts("No SPI flash selected. Please run `sf probe'\n"); return 1; } if (strcmp(cmd, "read") == 0 || strcmp(cmd, "write") == 0) return do_spi_flash_read_write(argc - 1, argv + 1); if (strcmp(cmd, "erase") == 0) return do_spi_flash_erase(argc - 1, argv + 1); usage: cmd_usage(cmdtp); return 1; } U_BOOT_CMD( sf, 5, 1, do_spi_flash, "SPI flash sub-system", "probe [bus:]cs [hz] [mode] - init flash device on given SPI bus\n" " and chip select\n" "sf read addr offset len - read `len' bytes starting at\n" " `offset' to memory at `addr'\n" "sf write addr offset len - write `len' bytes from memory\n" " at `addr' to flash at `offset'\n" "sf erase offset len - erase `len' bytes from `offset'" );