diff options
| author | Heiko Schocher <hs@denx.de> | 2016-06-07 08:55:43 +0200 |
|---|---|---|
| committer | Tom Rini <trini@konsulko.com> | 2016-06-09 13:53:12 -0400 |
| commit | 02b11f11993bc99c0ace4e750ba03f347502ebe9 (patch) | |
| tree | 0b0f7fcf0a64bb3e48ca1d02973a254c928d19c1 /board/siemens/draco | |
| parent | 3a504d9639a2cef276a6e9e31cee11584c885639 (diff) | |
am335x, dxr2: get ECC sType from I2C eeprom
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>
Diffstat (limited to 'board/siemens/draco')
| -rw-r--r-- | board/siemens/draco/board.c | 45 |
1 files changed, 44 insertions, 1 deletions
diff --git a/board/siemens/draco/board.c b/board/siemens/draco/board.c index 988c12ac7c..41bdef0f6b 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) { |