Merge branch 'sf' of git://git.denx.de/u-boot-blackfin

* 'sf' of git://git.denx.de/u-boot-blackfin:
  README: Add description of SPI Flash (SF) command configuration
  sf command: allow default bus and chip selects
  sf: eeprom_m95xxx: set a sane default timeout
  sf: eeprom_m95xxx: fix up style

README

@@ -815,6 +815,7 @@ The following options need to be configured:
 					  (requires CONFIG_CMD_I2C)
 		CONFIG_CMD_SETGETDCR	  Support for DCR Register access
 					  (4xx only)
+		CONFIG_CMD_SF		* Read/write/erase SPI NOR flash
 		CONFIG_CMD_SHA1SUM	  print sha1 memory digest
 					  (requires CONFIG_CMD_MEMORY)
 		CONFIG_CMD_SOURCE	  "source" command Support
@@ -2197,6 +2198,25 @@ The following options need to be configured:
 		allows to read/write in Dataflash via the standard
 		commands cp, md...
 
+- Serial Flash support
+		CONFIG_CMD_SF
+
+		Defining this option enables SPI flash commands
+		'sf probe/read/write/erase/update'.
+
+		Usage requires an initial 'probe' to define the serial
+		flash parameters, followed by read/write/erase/update
+		commands.
+
+		The following defaults may be provided by the platform
+		to handle the common case when only a single serial
+		flash is present on the system.
+
+		CONFIG_SF_DEFAULT_BUS		Bus identifier
+		CONFIG_SF_DEFAULT_CS		Chip-select
+		CONFIG_SF_DEFAULT_MODE 		(see include/spi.h)
+		CONFIG_SF_DEFAULT_SPEED		in Hz
+
 - SystemACE Support:
 		CONFIG_SYSTEMACE
 

common/cmd_sf.c

@@ -17,6 +17,12 @@
 #ifndef CONFIG_SF_DEFAULT_MODE
 # define CONFIG_SF_DEFAULT_MODE		SPI_MODE_3
 #endif
+#ifndef CONFIG_SF_DEFAULT_CS
+# define CONFIG_SF_DEFAULT_CS		0
+#endif
+#ifndef CONFIG_SF_DEFAULT_BUS
+# define CONFIG_SF_DEFAULT_BUS		0
+#endif
 
 static struct spi_flash *flash;
 
@@ -63,27 +69,26 @@ static int sf_parse_len_arg(char *arg, ulong *len)
 
 static int do_spi_flash_probe(int argc, char * const argv[])
 {
-	unsigned int bus = 0;
-	unsigned int cs;
+	unsigned int bus = CONFIG_SF_DEFAULT_BUS;
+	unsigned int cs = CONFIG_SF_DEFAULT_CS;
 	unsigned int speed = CONFIG_SF_DEFAULT_SPEED;
 	unsigned int mode = CONFIG_SF_DEFAULT_MODE;
 	char *endp;
 	struct spi_flash *new;
 
-	if (argc < 2)
-		return -1;
-
-	cs = simple_strtoul(argv[1], &endp, 0);
-	if (*argv[1] == 0 || (*endp != 0 && *endp != ':'))
-		return -1;
-	if (*endp == ':') {
-		if (endp[1] == 0)
+	if (argc >= 2) {
+		cs = simple_strtoul(argv[1], &endp, 0);
+		if (*argv[1] == 0 || (*endp != 0 && *endp != ':'))
 			return -1;
+		if (*endp == ':') {
+			if (endp[1] == 0)
+				return -1;
 
-		bus = cs;
-		cs = simple_strtoul(endp + 1, &endp, 0);
-		if (*endp != 0)
-			return -1;
+			bus = cs;
+			cs = simple_strtoul(endp + 1, &endp, 0);
+			if (*endp != 0)
+				return -1;
+		}
 	}
 
 	if (argc >= 3) {
@@ -299,7 +304,7 @@ usage:
 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"
+	"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"

drivers/mtd/spi/eeprom_m95xxx.c

@@ -37,33 +37,37 @@
 #define CONFIG_DEFAULT_SPI_MODE SPI_MODE_0
 #endif
 
-ssize_t spi_read (uchar *addr, int alen, uchar *buffer, int len)
+#ifndef CONFIG_SYS_SPI_WRITE_TOUT
+#define CONFIG_SYS_SPI_WRITE_TOUT (5 * CONFIG_SYS_HZ)
+#endif
+
+ssize_t spi_read(uchar *addr, int alen, uchar *buffer, int len)
 {
 	struct spi_slave *slave;
 	u8 cmd = SPI_EEPROM_READ;
 
 	slave = spi_setup_slave(CONFIG_DEFAULT_SPI_BUS, 1, 1000000,
 			CONFIG_DEFAULT_SPI_MODE);
-	if(!slave)
+	if (!slave)
 		return 0;
 
 	spi_claim_bus(slave);
 
 	/* command */
-	if(spi_xfer(slave, 8, &cmd, NULL, SPI_XFER_BEGIN))
+	if (spi_xfer(slave, 8, &cmd, NULL, SPI_XFER_BEGIN))
 		return -1;
 
 	/*
-	 * if alen == 3, addr[0] is the block number, we never use it here. All we
-	 * need are the lower 16 bits
+	 * if alen == 3, addr[0] is the block number, we never use it here.
+	 * All we need are the lower 16 bits.
 	 */
 	if (alen == 3)
 		addr++;
 
 	/* address, and data */
-	if(spi_xfer(slave, 16, addr, NULL, 0))
+	if (spi_xfer(slave, 16, addr, NULL, 0))
 		return -1;
-	if(spi_xfer(slave, 8 * len, NULL, buffer, SPI_XFER_END))
+	if (spi_xfer(slave, 8 * len, NULL, buffer, SPI_XFER_END))
 		return -1;
 
 	spi_release_bus(slave);
@@ -71,7 +75,7 @@ ssize_t spi_read (uchar *addr, int alen, uchar *buffer, int len)
 	return len;
 }
 
-ssize_t spi_write (uchar *addr, int alen, uchar *buffer, int len)
+ssize_t spi_write(uchar *addr, int alen, uchar *buffer, int len)
 {
 	struct spi_slave *slave;
 	char buf[3];
@@ -85,7 +89,7 @@ ssize_t spi_write (uchar *addr, int alen, uchar *buffer, int len)
 	spi_claim_bus(slave);
 
 	buf[0] = SPI_EEPROM_WREN;
-	if(spi_xfer(slave, 8, buf, NULL, SPI_XFER_BEGIN | SPI_XFER_END))
+	if (spi_xfer(slave, 8, buf, NULL, SPI_XFER_BEGIN | SPI_XFER_END))
 		return -1;
 
 	buf[0] = SPI_EEPROM_WRITE;
@@ -98,9 +102,9 @@ ssize_t spi_write (uchar *addr, int alen, uchar *buffer, int len)
 
 	memcpy(buf + 1, addr, alen);
 	/* command + addr, then data */
-	if(spi_xfer(slave, 24, buf, NULL, SPI_XFER_BEGIN))
+	if (spi_xfer(slave, 24, buf, NULL, SPI_XFER_BEGIN))
 		return -1;
-	if(spi_xfer(slave, len * 8, buffer, NULL, SPI_XFER_END))
+	if (spi_xfer(slave, len * 8, buffer, NULL, SPI_XFER_END))
 		return -1;
 
 	start = get_timer(0);
@@ -115,7 +119,7 @@ ssize_t spi_write (uchar *addr, int alen, uchar *buffer, int len)
 	} while (get_timer(start) < CONFIG_SYS_SPI_WRITE_TOUT);
 
 	if (buf[1] & 1)
-		printf ("*** spi_write: Time out while writing!\n");
+		printf("*** spi_write: Timeout while writing!\n");
 
 	spi_release_bus(slave);
 	spi_free_slave(slave);