read the ECC Type field from the i2c eeprom, instead configuring it static in the U-Boot binary.
see RM: Table 26-17. NAND Geometry Information on I2C EEPROM
Signed-off-by: Heiko Schocher hs@denx.de ---
board/siemens/draco/board.c | 45 ++++++++++++++++++++++++++++++++++++++++++++- 1 file changed, 44 insertions(+), 1 deletion(-)
diff --git a/board/siemens/draco/board.c b/board/siemens/draco/board.c index 988c12a..41bdef0 100644 --- a/board/siemens/draco/board.c +++ b/board/siemens/draco/board.c @@ -105,6 +105,40 @@ static void print_chip_data(void) } #endif /* CONFIG_SPL_BUILD */
+#define AM335X_NAND_ECC_MASK 0x0f +#define AM335X_NAND_ECC_TYPE_16 0x02 + +static int ecc_type; + +struct am335x_nand_geometry { + u32 magic; + u8 nand_geo_addr; + u8 nand_geo_page; + u8 nand_bus; +}; + +static int draco_read_nand_geometry(void) +{ + struct am335x_nand_geometry geo; + + /* Read NAND geometry */ + if (i2c_read(CONFIG_SYS_I2C_EEPROM_ADDR, 0x80, 2, + (uchar *)&geo, sizeof(struct am335x_nand_geometry))) { + printf("Could not read the NAND geomtery; something fundamentally wrong on the I2C bus.\n"); + return -EIO; + } + if (geo.magic != 0xa657b310) { + printf("%s: bad magic: %x\n", __func__, geo.magic); + return -EFAULT; + } + if ((geo.nand_bus & AM335X_NAND_ECC_MASK) == AM335X_NAND_ECC_TYPE_16) + ecc_type = 16; + else + ecc_type = 8; + + return 0; +} + /* * Read header information from EEPROM into global structure. */ @@ -147,6 +181,8 @@ static int read_eeprom(void) printf("Warning: No chip data in eeprom\n");
print_ddr3_timings(); + + return draco_read_nand_geometry(); #endif return 0; } @@ -207,7 +243,14 @@ static void spl_siemens_board_init(void) #ifdef CONFIG_BOARD_LATE_INIT int board_late_init(void) { - omap_nand_switch_ecc(1, 8); + int ret; + + ret = draco_read_nand_geometry(); + if (ret != 0) + return ret; + + nand_curr_device = 0; + omap_nand_switch_ecc(1, ecc_type); #ifdef CONFIG_FACTORYSET /* Set ASN in environment*/ if (factory_dat.asn[0] != 0) {