[U-Boot] [PATCH 5/5] cgtqmx6eval: Protect the manufacturing information in SPI NOR

[Otavio Salvador]

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 at 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
-- 
2.5.1