The last 16 KiB of the SPI NOR contain some manufacturing information, which should not be erased/overwritten.
Configure the protection bits BP2, BP1 and BP0 so that this region is protected.
Signed-off-by: Otavio Salvador otavio@ossystems.com.br ---
board/congatec/cgtqmx6eval/cgtqmx6eval.c | 25 +++++++++++++++++++++++++ include/configs/cgtqmx6eval.h | 2 ++ 2 files changed, 27 insertions(+)
diff --git a/board/congatec/cgtqmx6eval/cgtqmx6eval.c b/board/congatec/cgtqmx6eval/cgtqmx6eval.c index a9694d5..9aff08d 100644 --- a/board/congatec/cgtqmx6eval/cgtqmx6eval.c +++ b/board/congatec/cgtqmx6eval/cgtqmx6eval.c @@ -31,6 +31,8 @@ #include <miiphy.h> #include <netdev.h> #include <micrel.h> +#include <spi_flash.h> +#include <spi.h>
DECLARE_GLOBAL_DATA_PTR;
@@ -399,6 +401,22 @@ void setup_spinor(void) gpio_direction_output(IMX_GPIO_NR(3, 19), 0); }
+static void spinor_protect(void) +{ + struct spi_flash *spi; + + spi = spi_flash_probe(CONFIG_ENV_SPI_BUS, CONFIG_ENV_SPI_CS, + CONFIG_ENV_SPI_MAX_HZ, CONFIG_ENV_SPI_MODE); + /* + * Set BP2 BP1 BP0 to 001, so that the last 64 sectors + * can be protected (0x3f0000 to 0x3fffff). + * + * This area stores some manufacturing information that + * should not be erased. + */ + spi_flash_cmd_write_status(spi, 1 << 2); +} + #ifdef CONFIG_FSL_ESDHC static struct fsl_esdhc_cfg usdhc_cfg[] = { {USDHC2_BASE_ADDR}, @@ -711,3 +729,10 @@ int misc_init_r(void) #endif return 0; } + +int board_late_init(void) +{ + spinor_protect(); + + return 0; +} diff --git a/include/configs/cgtqmx6eval.h b/include/configs/cgtqmx6eval.h index 66f81ec..64ee6f8 100644 --- a/include/configs/cgtqmx6eval.h +++ b/include/configs/cgtqmx6eval.h @@ -21,6 +21,7 @@ #define CONFIG_SYS_MALLOC_LEN (10 * 1024 * 1024)
#define CONFIG_BOARD_EARLY_INIT_F +#define CONFIG_BOARD_LATE_INIT #define CONFIG_MISC_INIT_R
#define CONFIG_MXC_UART @@ -34,6 +35,7 @@ #define CONFIG_SPI_FLASH #define CONFIG_SPI_FLASH_STMICRO #define CONFIG_SPI_FLASH_SST +#define CONFIG_SPI_NOR_PROTECTION #define CONFIG_MXC_SPI #define CONFIG_SF_DEFAULT_BUS 0 #define CONFIG_SF_DEFAULT_SPEED 20000000