at91: add hwecc method for nand

[oweals/u-boot.git] / drivers / mtd / nand / atmel_nand_ecc.h

diff --git a/drivers/mtd/nand/atmel_nand_ecc.h b/drivers/mtd/nand/atmel_nand_ecc.h
new file mode 100644 (file)
index 0000000..1ee7f99
--- /dev/null
+++ b/drivers/mtd/nand/atmel_nand_ecc.h
@@ -0,0 +1,36 @@
+/*
+ * Error Corrected Code Controller (ECC) - System peripherals regsters.
+ * Based on AT91SAM9260 datasheet revision B.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.
+ */
+
+#ifndef ATMEL_NAND_ECC_H
+#define ATMEL_NAND_ECC_H
+
+#define ATMEL_ECC_CR           0x00                    /* Control register */
+#define                ATMEL_ECC_RST           (1 << 0)                /* Reset parity */
+
+#define ATMEL_ECC_MR           0x04                    /* Mode register */
+#define                ATMEL_ECC_PAGESIZE      (3 << 0)                /* Page Size */
+#define                        ATMEL_ECC_PAGESIZE_528          (0)
+#define                        ATMEL_ECC_PAGESIZE_1056         (1)
+#define                        ATMEL_ECC_PAGESIZE_2112         (2)
+#define                        ATMEL_ECC_PAGESIZE_4224         (3)
+
+#define ATMEL_ECC_SR           0x08                    /* Status register */
+#define                ATMEL_ECC_RECERR                (1 << 0)                /* Recoverable Error */
+#define                ATMEL_ECC_ECCERR                (1 << 1)                /* ECC Single Bit Error */
+#define                ATMEL_ECC_MULERR                (1 << 2)                /* Multiple Errors */
+
+#define ATMEL_ECC_PR           0x0c                    /* Parity register */
+#define                ATMEL_ECC_BITADDR       (0xf << 0)              /* Bit Error Address */
+#define                ATMEL_ECC_WORDADDR      (0xfff << 4)            /* Word Error Address */
+
+#define ATMEL_ECC_NPR          0x10                    /* NParity register */
+#define                ATMEL_ECC_NPARITY       (0xffff << 0)           /* NParity */
+
+#endif