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authorJagannadha Sutradharudu Teki <jaganna@xilinx.com>2013-09-26 14:24:58 +0530
committerJagannadha Sutradharudu Teki <jaganna@xilinx.com>2013-10-07 17:55:45 +0530
commit32ebd1a7d51818a327f2e23570d6bfc542c68e12 (patch)
treef1a33f67b52904e939b77944b7f57558ab96ce86 /drivers
parent0f6232801cee4f45dbdb0cec45f71172c9b617ca (diff)
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sf: probe: Simply the BAR configuration logic
Signed-off-by: Jagannadha Sutradharudu Teki <jaganna@xilinx.com>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/mtd/spi/spi_flash_internal.h8
-rw-r--r--drivers/mtd/spi/spi_flash_probe.c66
2 files changed, 20 insertions, 54 deletions
diff --git a/drivers/mtd/spi/spi_flash_internal.h b/drivers/mtd/spi/spi_flash_internal.h
index ce34ce0..61de237 100644
--- a/drivers/mtd/spi/spi_flash_internal.h
+++ b/drivers/mtd/spi/spi_flash_internal.h
@@ -31,11 +31,6 @@
#define SPI_FLASH_16MB_BOUN 0x1000000
-/* Manufacture ID's */
-#define SPI_FLASH_SPANSION_IDCODE0 0x01
-#define SPI_FLASH_STMICRO_IDCODE0 0x20
-#define SPI_FLASH_WINBOND_IDCODE0 0xef
-
#ifdef CONFIG_SPI_FLASH_BAR
/* Bank addr access commands */
# define CMD_BANKADDR_BRWR 0x17
@@ -102,9 +97,6 @@ int spi_flash_cmd_write_status(struct spi_flash *flash, u8 sr);
#ifdef CONFIG_SPI_FLASH_BAR
/* Program the bank address register */
int spi_flash_cmd_bankaddr_write(struct spi_flash *flash, u8 bank_sel);
-
-/* Configure the BAR - discover the bank cmds */
-int spi_flash_bank_config(struct spi_flash *flash, u8 idcode0);
#endif
/*
diff --git a/drivers/mtd/spi/spi_flash_probe.c b/drivers/mtd/spi/spi_flash_probe.c
index 8ea6915..cc30ad1 100644
--- a/drivers/mtd/spi/spi_flash_probe.c
+++ b/drivers/mtd/spi/spi_flash_probe.c
@@ -221,54 +221,36 @@ struct spi_flash *spi_flash_validate_ids(struct spi_slave *spi, u8 *idcode)
flash->poll_cmd = CMD_FLAG_STATUS;
#endif
- /* Flash powers up read-only, so clear BP# bits */
-#if defined(CONFIG_SPI_FLASH_ATMEL) || \
- defined(CONFIG_SPI_FLASH_MACRONIX) || \
- defined(CONFIG_SPI_FLASH_SST)
- spi_flash_cmd_write_status(flash, 0);
-#endif
-
- return flash;
-}
-
#ifdef CONFIG_SPI_FLASH_BAR
-int spi_flash_bank_config(struct spi_flash *flash, u8 idcode0)
-{
- u8 cmd;
+ /* Configure the BAR - discover bank cmds and read current bank */
u8 curr_bank = 0;
-
- /* discover bank cmds */
- switch (idcode0) {
- case SPI_FLASH_SPANSION_IDCODE0:
- flash->bank_read_cmd = CMD_BANKADDR_BRRD;
- flash->bank_write_cmd = CMD_BANKADDR_BRWR;
- break;
- case SPI_FLASH_STMICRO_IDCODE0:
- case SPI_FLASH_WINBOND_IDCODE0:
- flash->bank_read_cmd = CMD_EXTNADDR_RDEAR;
- flash->bank_write_cmd = CMD_EXTNADDR_WREAR;
- break;
- default:
- printf("SF: Unsupported bank commands %02x\n", idcode0);
- return -1;
- }
-
- /* read the bank reg - on which bank the flash is in currently */
- cmd = flash->bank_read_cmd;
if (flash->size > SPI_FLASH_16MB_BOUN) {
- if (spi_flash_read_common(flash, &cmd, 1, &curr_bank, 1)) {
+ flash->bank_read_cmd = (idcode[0] == 0x01) ?
+ CMD_BANKADDR_BRRD : CMD_EXTNADDR_RDEAR;
+ flash->bank_write_cmd = (idcode[0] == 0x01) ?
+ CMD_BANKADDR_BRWR : CMD_EXTNADDR_WREAR;
+
+ if (spi_flash_read_common(flash, &flash->bank_read_cmd, 1,
+ &curr_bank, 1)) {
debug("SF: fail to read bank addr register\n");
- return -1;
+ return NULL;
}
flash->bank_curr = curr_bank;
} else {
flash->bank_curr = curr_bank;
}
+#endif
- return 0;
-}
+ /* Flash powers up read-only, so clear BP# bits */
+#if defined(CONFIG_SPI_FLASH_ATMEL) || \
+ defined(CONFIG_SPI_FLASH_MACRONIX) || \
+ defined(CONFIG_SPI_FLASH_SST)
+ spi_flash_cmd_write_status(flash, 0);
#endif
+ return flash;
+}
+
#ifdef CONFIG_OF_CONTROL
int spi_flash_decode_fdt(const void *blob, struct spi_flash *flash)
{
@@ -302,7 +284,7 @@ struct spi_flash *spi_flash_probe(unsigned int bus, unsigned int cs,
{
struct spi_slave *spi;
struct spi_flash *flash = NULL;
- u8 idcode[5], *idp;
+ u8 idcode[5];
int ret;
/* Setup spi_slave */
@@ -332,18 +314,10 @@ struct spi_flash *spi_flash_probe(unsigned int bus, unsigned int cs,
#endif
/* Validate ID's from flash dev table */
- idp = idcode;
- flash = spi_flash_validate_ids(spi, idp);
+ flash = spi_flash_validate_ids(spi, idcode);
if (!flash)
goto err_read_id;
-#ifdef CONFIG_SPI_FLASH_BAR
- /* Configure the BAR - discover bank cmds and read current bank */
- ret = spi_flash_bank_config(flash, *idp);
- if (ret < 0)
- goto err_read_id;
-#endif
-
#ifdef CONFIG_OF_CONTROL
if (spi_flash_decode_fdt(gd->fdt_blob, flash)) {
debug("SF: FDT decode error\n");