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-rw-r--r--tools/Makefile2
-rw-r--r--tools/atmel_pmecc_params.c51
2 files changed, 53 insertions, 0 deletions
diff --git a/tools/Makefile b/tools/Makefile
index e6d8045..7610557 100644
--- a/tools/Makefile
+++ b/tools/Makefile
@@ -38,6 +38,8 @@ ENVCRC-$(CONFIG_ENV_IS_IN_NVRAM) = y
ENVCRC-$(CONFIG_ENV_IS_IN_SPI_FLASH) = y
CONFIG_BUILD_ENVCRC ?= $(ENVCRC-y)
+hostprogs-$(CONFIG_SPL_GENERATE_ATMEL_PMECC_HEADER) += atmel_pmecc_params$(SFX)
+
# TODO: CONFIG_CMD_LICENSE does not work
hostprogs-$(CONFIG_CMD_LICENSE) += bin2header$(SFX)
hostprogs-$(CONFIG_LCD_LOGO) += bmp_logo$(SFX)
diff --git a/tools/atmel_pmecc_params.c b/tools/atmel_pmecc_params.c
new file mode 100644
index 0000000..8eaf27f
--- /dev/null
+++ b/tools/atmel_pmecc_params.c
@@ -0,0 +1,51 @@
+/*
+ * (C) Copyright 2014 Andreas Bießmann <andreas.devel@googlemail.com>
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+/*
+ * This is a host tool for generating an appropriate string out of board
+ * configuration. The string is required for correct generation of PMECC
+ * header which in turn is required for NAND flash booting of Atmel AT91 style
+ * hardware.
+ *
+ * See doc/README.atmel_pmecc for more information.
+ */
+
+#include <config.h>
+#include <stdlib.h>
+
+static int pmecc_get_ecc_bytes(int cap, int sector_size)
+{
+ int m = 12 + sector_size / 512;
+ return (m * cap + 7) / 8;
+}
+
+int main(int argc, char *argv[])
+{
+ unsigned int use_pmecc = 0;
+ unsigned int sector_per_page;
+ unsigned int sector_size = CONFIG_PMECC_SECTOR_SIZE;
+ unsigned int oob_size = CONFIG_SYS_NAND_OOBSIZE;
+ unsigned int ecc_bits = CONFIG_PMECC_CAP;
+ unsigned int ecc_offset;
+
+#ifdef CONFIG_ATMEL_NAND_HW_PMECC
+ use_pmecc = 1;
+#endif
+
+ sector_per_page = CONFIG_SYS_NAND_PAGE_SIZE / CONFIG_PMECC_SECTOR_SIZE;
+ ecc_offset = oob_size -
+ pmecc_get_ecc_bytes(ecc_bits, sector_size) * sector_per_page;
+
+ printf("usePmecc=%d,", use_pmecc);
+ printf("sectorPerPage=%d,", sector_per_page);
+ printf("sectorSize=%d,", sector_size);
+ printf("spareSize=%d,", oob_size);
+ printf("eccBits=%d,", ecc_bits);
+ printf("eccOffset=%d", ecc_offset);
+ printf("\n");
+
+ exit(EXIT_SUCCESS);
+}