diff --git a/common/cmd_sf.c b/common/cmd_sf.c
index 6e7be81..11a491d 100644
--- a/common/cmd_sf.c
+++ b/common/cmd_sf.c
@@ -19,6 +19,47 @@
 
 static struct spi_flash *flash;
 
+
+/*
+ * 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)
+		*len = ROUND(len_arg - 1, flash->sector_size);
+	else
+		*len = len_arg;
+
+	return 1;
+}
+
 static int do_spi_flash_probe(int argc, char * const argv[])
 {
 	unsigned int bus = 0;
@@ -29,30 +70,30 @@
 	struct spi_flash *new;
 
 	if (argc < 2)
-		goto usage;
+		return -1;
 
 	cs = simple_strtoul(argv[1], &endp, 0);
 	if (*argv[1] == 0 || (*endp != 0 && *endp != ':'))
-		goto usage;
+		return -1;
 	if (*endp == ':') {
 		if (endp[1] == 0)
-			goto usage;
+			return -1;
 
 		bus = cs;
 		cs = simple_strtoul(endp + 1, &endp, 0);
 		if (*endp != 0)
-			goto usage;
+			return -1;
 	}
 
 	if (argc >= 3) {
 		speed = simple_strtoul(argv[2], &endp, 0);
 		if (*argv[2] == 0 || *endp != 0)
-			goto usage;
+			return -1;
 	}
 	if (argc >= 4) {
 		mode = simple_strtoul(argv[3], &endp, 16);
 		if (*argv[3] == 0 || *endp != 0)
-			goto usage;
+			return -1;
 	}
 
 	new = spi_flash_probe(bus, cs, speed, mode);
@@ -65,14 +106,7 @@
 		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 * const argv[])
@@ -85,17 +119,17 @@
 	int ret;
 
 	if (argc < 4)
-		goto usage;
+		return -1;
 
 	addr = simple_strtoul(argv[1], &endp, 16);
 	if (*argv[1] == 0 || *endp != 0)
-		goto usage;
+		return -1;
 	offset = simple_strtoul(argv[2], &endp, 16);
 	if (*argv[2] == 0 || *endp != 0)
-		goto usage;
+		return -1;
 	len = simple_strtoul(argv[3], &endp, 16);
 	if (*argv[3] == 0 || *endp != 0)
-		goto usage;
+		return -1;
 
 	buf = map_physmem(addr, len, MAP_WRBACK);
 	if (!buf) {
@@ -116,10 +150,6 @@
 	}
 
 	return 0;
-
-usage:
-	printf("Usage: sf %s addr offset len\n", argv[0]);
-	return 1;
 }
 
 static int do_spi_flash_erase(int argc, char * const argv[])
@@ -130,14 +160,15 @@
 	int ret;
 
 	if (argc < 3)
-		goto usage;
+		return -1;
 
 	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;
+		return -1;
+
+	ret = sf_parse_len_arg(argv[2], &len);
+	if (ret != 1)
+		return -1;
 
 	ret = spi_flash_erase(flash, offset, len);
 	if (ret) {
@@ -146,24 +177,25 @@
 	}
 
 	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 * const argv[])
 {
 	const char *cmd;
+	int ret;
 
 	/* need at least two arguments */
 	if (argc < 2)
 		goto usage;
 
 	cmd = argv[1];
+	--argc;
+	++argv;
 
-	if (strcmp(cmd, "probe") == 0)
-		return do_spi_flash_probe(argc - 1, argv + 1);
+	if (strcmp(cmd, "probe") == 0) {
+		ret = do_spi_flash_probe(argc, argv);
+		goto done;
+	}
 
 	/* The remaining commands require a selected device */
 	if (!flash) {
@@ -172,9 +204,15 @@
 	}
 
 	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);
+		ret = do_spi_flash_read_write(argc, argv);
+	else if (strcmp(cmd, "erase") == 0)
+		ret = do_spi_flash_erase(argc, argv);
+	else
+		ret = -1;
+
+done:
+	if (ret != -1)
+		return ret;
 
 usage:
 	return cmd_usage(cmdtp);
@@ -189,5 +227,6 @@
 	"				  `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'"
+	"sf erase offset [+]len		- erase `len' bytes from `offset'\n"
+	"				  `+len' round up `len' to block size"
 );
diff --git a/drivers/mtd/spi/atmel.c b/drivers/mtd/spi/atmel.c
index a9910b1..1ecece0 100644
--- a/drivers/mtd/spi/atmel.c
+++ b/drivers/mtd/spi/atmel.c
@@ -113,8 +113,35 @@
 
 static int at45_wait_ready(struct spi_flash *flash, unsigned long timeout)
 {
-	return spi_flash_cmd_poll_bit(flash, timeout,
-		CMD_AT45_READ_STATUS, AT45_STATUS_READY);
+	struct spi_slave *spi = flash->spi;
+	unsigned long timebase;
+	int ret;
+	u8 cmd = CMD_AT45_READ_STATUS;
+	u8 status;
+
+	timebase = get_timer(0);
+
+	ret = spi_xfer(spi, 8, &cmd, NULL, SPI_XFER_BEGIN);
+	if (ret)
+		return -1;
+
+	do {
+		ret = spi_xfer(spi, 8, NULL, &status, 0);
+		if (ret)
+			return -1;
+
+		if (status & AT45_STATUS_READY)
+			break;
+	} while (get_timer(timebase) < timeout);
+
+	/* Deactivate CS */
+	spi_xfer(spi, 0, NULL, NULL, SPI_XFER_END);
+
+	if (status & AT45_STATUS_READY)
+		return 0;
+
+	/* Timed out */
+	return -1;
 }
 
 /*
@@ -301,7 +328,7 @@
 /*
  * TODO: the two erase funcs (_p2/_at45) should get unified ...
  */
-int dataflash_erase_p2(struct spi_flash *flash, u32 offset, size_t len)
+static int dataflash_erase_p2(struct spi_flash *flash, u32 offset, size_t len)
 {
 	struct atmel_spi_flash *asf = to_atmel_spi_flash(flash);
 	unsigned long page_size;
@@ -360,7 +387,7 @@
 	return ret;
 }
 
-int dataflash_erase_at45(struct spi_flash *flash, u32 offset, size_t len)
+static int dataflash_erase_at45(struct spi_flash *flash, u32 offset, size_t len)
 {
 	struct atmel_spi_flash *asf = to_atmel_spi_flash(flash);
 	unsigned long page_addr;
@@ -495,14 +522,11 @@
 		goto err;
 	}
 
+	asf->flash.sector_size = page_size;
 	asf->flash.size = page_size * params->pages_per_block
 				* params->blocks_per_sector
 				* params->nr_sectors;
 
-	printf("SF: Detected %s with page size %u, total ",
-	       params->name, page_size);
-	print_size(asf->flash.size, "\n");
-
 	return &asf->flash;
 
 err:
diff --git a/drivers/mtd/spi/eon.c b/drivers/mtd/spi/eon.c
index 01caed5..e3de3aa 100644
--- a/drivers/mtd/spi/eon.c
+++ b/drivers/mtd/spi/eon.c
@@ -119,13 +119,9 @@
 	return ret;
 }
 
-int eon_erase(struct spi_flash *flash, u32 offset, size_t len)
+static int eon_erase(struct spi_flash *flash, u32 offset, size_t len)
 {
-	struct eon_spi_flash *eon = to_eon_spi_flash(flash);
-	return spi_flash_cmd_erase(flash, CMD_EN25Q128_BE,
-		eon->params->page_size * eon->params->pages_per_sector *
-			eon->params->sectors_per_block;
-		offset, len);
+	return spi_flash_cmd_erase(flash, CMD_EN25Q128_BE, offset, len);
 }
 
 struct spi_flash *spi_flash_probe_eon(struct spi_slave *spi, u8 *idcode)
@@ -158,11 +154,10 @@
 	eon->flash.write = eon_write;
 	eon->flash.erase = eon_erase;
 	eon->flash.read = spi_flash_cmd_read_fast;
+	eon->flash.sector_size = params->page_size * params->pages_per_sector
+	    * params->sectors_per_block;
 	eon->flash.size = params->page_size * params->pages_per_sector
 	    * params->nr_sectors;
 
-	debug("SF: Detected %s with page size %u, total %u bytes\n",
-	      params->name, params->page_size, eon->flash.size);
-
 	return &eon->flash;
 }
diff --git a/drivers/mtd/spi/macronix.c b/drivers/mtd/spi/macronix.c
index 4155d4d..ff66f2a 100644
--- a/drivers/mtd/spi/macronix.c
+++ b/drivers/mtd/spi/macronix.c
@@ -175,13 +175,9 @@
 	return ret;
 }
 
-int macronix_erase(struct spi_flash *flash, u32 offset, size_t len)
+static int macronix_erase(struct spi_flash *flash, u32 offset, size_t len)
 {
-	struct macronix_spi_flash *mcx = to_macronix_spi_flash(flash);
-	return spi_flash_cmd_erase(flash, CMD_MX25XX_BE,
-		mcx->params->page_size * mcx->params->pages_per_sector *
-			mcx->params->sectors_per_block,
-		offset, len);
+	return spi_flash_cmd_erase(flash, CMD_MX25XX_BE, offset, len);
 }
 
 struct spi_flash *spi_flash_probe_macronix(struct spi_slave *spi, u8 *idcode)
@@ -215,12 +211,9 @@
 	mcx->flash.write = macronix_write;
 	mcx->flash.erase = macronix_erase;
 	mcx->flash.read = spi_flash_cmd_read_fast;
-	mcx->flash.size = params->page_size * params->pages_per_sector
-	    * params->sectors_per_block * params->nr_blocks;
-
-	printf("SF: Detected %s with page size %u, total ",
-	       params->name, params->page_size);
-	print_size(mcx->flash.size, "\n");
+	mcx->flash.sector_size = params->page_size * params->pages_per_sector
+		* params->sectors_per_block;
+	mcx->flash.size = mcx->flash.sector_size * params->nr_blocks;
 
 	return &mcx->flash;
 }
diff --git a/drivers/mtd/spi/ramtron.c b/drivers/mtd/spi/ramtron.c
index 171390d..078d16c 100644
--- a/drivers/mtd/spi/ramtron.c
+++ b/drivers/mtd/spi/ramtron.c
@@ -233,7 +233,7 @@
 		CMD_RAMTRON_WRITE);
 }
 
-int ramtron_erase(struct spi_flash *flash, u32 offset, size_t len)
+static int ramtron_erase(struct spi_flash *flash, u32 offset, size_t len)
 {
 	debug("SF: Erase of RAMTRON FRAMs is pointless\n");
 	return -1;
@@ -312,8 +312,5 @@
 	sn->flash.erase = ramtron_erase;
 	sn->flash.size = params->size;
 
-	printf("SF: Detected %s with size ", params->name);
-	print_size(sn->flash.size, "\n");
-
 	return &sn->flash;
 }
diff --git a/drivers/mtd/spi/spansion.c b/drivers/mtd/spi/spansion.c
index d54a5fa..a3401b3 100644
--- a/drivers/mtd/spi/spansion.c
+++ b/drivers/mtd/spi/spansion.c
@@ -196,12 +196,9 @@
 	return ret;
 }
 
-int spansion_erase(struct spi_flash *flash, u32 offset, size_t len)
+static int spansion_erase(struct spi_flash *flash, u32 offset, size_t len)
 {
-	struct spansion_spi_flash *spsn = to_spansion_spi_flash(flash);
-	return spi_flash_cmd_erase(flash, CMD_S25FLXX_SE,
-		spsn->params->page_size * spsn->params->pages_per_sector,
-		offset, len);
+	return spi_flash_cmd_erase(flash, CMD_S25FLXX_SE, offset, len);
 }
 
 struct spi_flash *spi_flash_probe_spansion(struct spi_slave *spi, u8 *idcode)
@@ -240,12 +237,8 @@
 	spsn->flash.write = spansion_write;
 	spsn->flash.erase = spansion_erase;
 	spsn->flash.read = spi_flash_cmd_read_fast;
-	spsn->flash.size = params->page_size * params->pages_per_sector
-	    * params->nr_sectors;
-
-	printf("SF: Detected %s with page size %u, total ",
-	       params->name, params->page_size);
-	print_size(spsn->flash.size, "\n");
+	spsn->flash.sector_size = params->page_size * params->pages_per_sector;
+	spsn->flash.size = spsn->flash.sector_size * params->nr_sectors;
 
 	return &spsn->flash;
 }
diff --git a/drivers/mtd/spi/spi_flash.c b/drivers/mtd/spi/spi_flash.c
index 5c261f1..c75b716 100644
--- a/drivers/mtd/spi/spi_flash.c
+++ b/drivers/mtd/spi/spi_flash.c
@@ -131,12 +131,13 @@
 }
 
 int spi_flash_cmd_erase(struct spi_flash *flash, u8 erase_cmd,
-			u32 erase_size, u32 offset, size_t len)
+			u32 offset, size_t len)
 {
-	u32 start, end;
+	u32 start, end, erase_size;
 	int ret;
 	u8 cmd[4];
 
+	erase_size = flash->sector_size;
 	if (offset % erase_size || len % erase_size) {
 		debug("SF: Erase offset/length not multiple of erase size\n");
 		return -1;
@@ -296,6 +297,10 @@
 		goto err_manufacturer_probe;
 	}
 
+	printf("SF: Detected %s with page size ", flash->name);
+	print_size(flash->sector_size, ", total ");
+	print_size(flash->size, "\n");
+
 	spi_release_bus(spi);
 
 	return flash;
diff --git a/drivers/mtd/spi/spi_flash_internal.h b/drivers/mtd/spi/spi_flash_internal.h
index d7bcd6d..fc109ce 100644
--- a/drivers/mtd/spi/spi_flash_internal.h
+++ b/drivers/mtd/spi/spi_flash_internal.h
@@ -64,7 +64,7 @@
 
 /* Erase sectors. */
 int spi_flash_cmd_erase(struct spi_flash *flash, u8 erase_cmd,
-			u32 erase_size, u32 offset, size_t len);
+			u32 offset, size_t len);
 
 /* Manufacturer-specific probe functions */
 struct spi_flash *spi_flash_probe_spansion(struct spi_slave *spi, u8 *idcode);
diff --git a/drivers/mtd/spi/sst.c b/drivers/mtd/spi/sst.c
index 792d04d..4dc2db2 100644
--- a/drivers/mtd/spi/sst.c
+++ b/drivers/mtd/spi/sst.c
@@ -71,6 +71,10 @@
 		.nr_sectors = 1024,
 		.name = "SST25VF032B",
 	},{
+		.idcode1 = 0x4b,
+		.nr_sectors = 2048,
+		.name = "SST25VF064C",
+	},{
 		.idcode1 = 0x01,
 		.nr_sectors = 16,
 		.name = "SST25WF512",
@@ -199,10 +203,9 @@
 	return ret;
 }
 
-int sst_erase(struct spi_flash *flash, u32 offset, size_t len)
+static int sst_erase(struct spi_flash *flash, u32 offset, size_t len)
 {
-	return spi_flash_cmd_erase(flash, CMD_SST_SE, SST_SECTOR_SIZE,
-		offset, len);
+	return spi_flash_cmd_erase(flash, CMD_SST_SE, offset, len);
 }
 
 static int
@@ -256,11 +259,9 @@
 
 	stm->flash.write = sst_write;
 	stm->flash.erase = sst_erase;
-	stm->flash.size = SST_SECTOR_SIZE * params->nr_sectors;
-
-	printf("SF: Detected %s with page size %u, total ",
-	       params->name, SST_SECTOR_SIZE);
-	print_size(stm->flash.size, "\n");
+	stm->flash.read = spi_flash_cmd_read_fast;
+	stm->flash.sector_size = SST_SECTOR_SIZE;
+	stm->flash.size = stm->flash.sector_size * params->nr_sectors;
 
 	/* Flash powers up read-only, so clear BP# bits */
 	sst_unlock(&stm->flash);
diff --git a/drivers/mtd/spi/stmicro.c b/drivers/mtd/spi/stmicro.c
index 7ef690d..a1959ca 100644
--- a/drivers/mtd/spi/stmicro.c
+++ b/drivers/mtd/spi/stmicro.c
@@ -197,12 +197,9 @@
 	return ret;
 }
 
-int stmicro_erase(struct spi_flash *flash, u32 offset, size_t len)
+static int stmicro_erase(struct spi_flash *flash, u32 offset, size_t len)
 {
-	struct stmicro_spi_flash *stm = to_stmicro_spi_flash(flash);
-	return spi_flash_cmd_erase(flash, CMD_M25PXX_SE,
-		stm->params->page_size * stm->params->pages_per_sector,
-		offset, len);
+	return spi_flash_cmd_erase(flash, CMD_M25PXX_SE, offset, len);
 }
 
 struct spi_flash *spi_flash_probe_stmicro(struct spi_slave *spi, u8 * idcode)
@@ -249,12 +246,8 @@
 	stm->flash.write = stmicro_write;
 	stm->flash.erase = stmicro_erase;
 	stm->flash.read = spi_flash_cmd_read_fast;
-	stm->flash.size = params->page_size * params->pages_per_sector
-	    * params->nr_sectors;
-
-	printf("SF: Detected %s with page size %u, total ",
-	       params->name, params->page_size);
-	print_size(stm->flash.size, "\n");
+	stm->flash.sector_size = params->page_size * params->pages_per_sector;
+	stm->flash.size = stm->flash.sector_size * params->nr_sectors;
 
 	return &stm->flash;
 }
diff --git a/drivers/mtd/spi/winbond.c b/drivers/mtd/spi/winbond.c
index e88802f..e8d30ae 100644
--- a/drivers/mtd/spi/winbond.c
+++ b/drivers/mtd/spi/winbond.c
@@ -170,12 +170,9 @@
 	return ret;
 }
 
-int winbond_erase(struct spi_flash *flash, u32 offset, size_t len)
+static int winbond_erase(struct spi_flash *flash, u32 offset, size_t len)
 {
-	struct winbond_spi_flash *stm = to_winbond_spi_flash(flash);
-	return spi_flash_cmd_erase(flash, CMD_W25_SE,
-		(1 << stm->params->l2_page_size) * stm->params->pages_per_sector,
-		offset, len);
+	return spi_flash_cmd_erase(flash, CMD_W25_SE, offset, len);
 }
 
 struct spi_flash *spi_flash_probe_winbond(struct spi_slave *spi, u8 *idcode)
@@ -213,13 +210,11 @@
 	stm->flash.write = winbond_write;
 	stm->flash.erase = winbond_erase;
 	stm->flash.read = spi_flash_cmd_read_fast;
+	stm->flash.sector_size = (1 << stm->params->l2_page_size) *
+		stm->params->pages_per_sector;
 	stm->flash.size = page_size * params->pages_per_sector
 				* params->sectors_per_block
 				* params->nr_blocks;
 
-	printf("SF: Detected %s with page size %u, total ",
-	       params->name, page_size);
-	print_size(stm->flash.size, "\n");
-
 	return &stm->flash;
 }
diff --git a/include/spi_flash.h b/include/spi_flash.h
index 1f8ba29..a384071 100644
--- a/include/spi_flash.h
+++ b/include/spi_flash.h
@@ -26,11 +26,6 @@
 #include <spi.h>
 #include <linux/types.h>
 
-struct spi_flash_region {
-	unsigned int	count;
-	unsigned int	size;
-};
-
 struct spi_flash {
 	struct spi_slave *spi;
 
@@ -38,6 +33,8 @@
 
 	u32		size;
 
+	u32		sector_size;
+
 	int		(*read)(struct spi_flash *flash, u32 offset,
 				size_t len, void *buf);
 	int		(*write)(struct spi_flash *flash, u32 offset,