mtd: nand: omap: add CONFIG_NAND_OMAP_ECCSCHEME for selection of ecc-scheme

This patch adds new CONFIG_NAND_OMAP_ECCSCHEME, replacing other distributed
CONFIG_xx used for selecting NAND ecc-schemes.
This patch aims at solving following issues.

1) Currently ecc-scheme is tied to SoC platform, which prevents user to select
   other ecc-schemes also supported in hardware. like;
 - most of OMAP3 SoC platforms use only 1-bit Hamming ecc-scheme, inspite
   the fact that they can use higher ecc-schemes like 8-bit ecc-schemes with
   software based error detection (OMAP_ECC_BCH4_CODE_HW_DETECTION_SW).
 - most of AM33xx SoC plaforms use 8-bit BCH ecc-scheme for now, but hardware
   supports BCH16 ecc-scheme also.

2) Different platforms use different CONFIG_xx to select ecc-schemes, which
   adds confusion for user while migrating platforms.
 - *CONFIG_NAND_OMAP_ELM* which enables ELM hardware engine, selects only
    8-bit BCH ecc-scheme with h/w based error-correction (OMAP_ECC_BCH8_CODE_HW)
    whereas ELM hardware engine supports other ecc-schemes also like; BCH4,
    and BCH16 (in future).
 - *CONFIG_NAND_OMAP_BCH8* selects 8-bit BCH ecc-scheme with s/w based error
    correction (OMAP_ECC_BCH8_CODE_HW_DETECTION_SW).
 - *CONFIG_SPL_NAND_SOFTECC* selects 1-bit Hamming ecc-scheme using s/w library

Thus adding new *CONFIG_NAND_OMAP_ECCSCHEME* de-couples ecc-scheme dependency
on SoC platform and NAND driver. And user can select ecc-scheme independently
foreach board.
However, selection some hardware based ecc-schemes (OMAP_ECC_BCHx_CODE_HW) still
depends on presence of ELM hardware engine on SoC. (Refer doc/README.nand)

Signed-off-by: Pekon Gupta <pekon@ti.com>

14 files changed, 15 insertions, 4 deletions

diff --git a/include/configs/am335x_evm.h b/include/configs/am335x_evm.h
index 73d8b4d..1d59167 100644
--- a/include/configs/am335x_evm.h
+++ b/include/configs/am335x_evm.h
@@ -240,7 +240,8 @@
 
 #define CONFIG_SYS_NAND_ECCSIZE		512
 #define CONFIG_SYS_NAND_ECCBYTES	14
-
+#define CONFIG_SYS_NAND_ONFI_DETECTION
+#define CONFIG_NAND_OMAP_ECCSCHEME	OMAP_ECC_BCH8_CODE_HW
 #define CONFIG_SYS_NAND_U_BOOT_START	CONFIG_SYS_TEXT_BASE
 #define CONFIG_SYS_NAND_U_BOOT_OFFS	0x80000
 #endif
diff --git a/include/configs/am335x_igep0033.h b/include/configs/am335x_igep0033.h
index 88ced73..115d1b3 100644
--- a/include/configs/am335x_igep0033.h
+++ b/include/configs/am335x_igep0033.h
@@ -264,6 +264,7 @@
 
 #define CONFIG_SYS_NAND_ECCSIZE		512
 #define CONFIG_SYS_NAND_ECCBYTES	14
+#define CONFIG_NAND_OMAP_ECCSCHEME	OMAP_ECC_BCH8_CODE_HW
 
 #define	CONFIG_SYS_NAND_U_BOOT_START	CONFIG_SYS_TEXT_BASE
 
diff --git a/include/configs/am3517_crane.h b/include/configs/am3517_crane.h
index c5e67bf..b24ef54 100644
--- a/include/configs/am3517_crane.h
+++ b/include/configs/am3517_crane.h
@@ -340,6 +340,7 @@
 						10, 11, 12, 13}
 #define CONFIG_SYS_NAND_ECCSIZE		512
 #define CONFIG_SYS_NAND_ECCBYTES	3
+#define CONFIG_NAND_OMAP_ECCSCHEME	OMAP_ECC_HAM1_CODE_HW
 #define CONFIG_SYS_NAND_U_BOOT_START	CONFIG_SYS_TEXT_BASE
 #define CONFIG_SYS_NAND_U_BOOT_OFFS	0x80000
 
diff --git a/include/configs/am3517_evm.h b/include/configs/am3517_evm.h
index 5ff65c6..f13fd70 100644
--- a/include/configs/am3517_evm.h
+++ b/include/configs/am3517_evm.h
@@ -334,6 +334,7 @@
 						10, 11, 12, 13}
 #define CONFIG_SYS_NAND_ECCSIZE		512
 #define CONFIG_SYS_NAND_ECCBYTES	3
+#define CONFIG_NAND_OMAP_ECCSCHEME	OMAP_ECC_HAM1_CODE_HW
 #define CONFIG_SYS_NAND_U_BOOT_START	CONFIG_SYS_TEXT_BASE
 #define CONFIG_SYS_NAND_U_BOOT_OFFS	0x80000
 
diff --git a/include/configs/devkit8000.h b/include/configs/devkit8000.h
index 8343891..13315dc 100644
--- a/include/configs/devkit8000.h
+++ b/include/configs/devkit8000.h
@@ -327,6 +327,7 @@
 
 #define CONFIG_SYS_NAND_ECCSIZE		512
 #define CONFIG_SYS_NAND_ECCBYTES	3
+#define CONFIG_NAND_OMAP_ECCSCHEME	OMAP_ECC_HAM1_CODE_HW
 
 #define CONFIG_SYS_NAND_U_BOOT_START   CONFIG_SYS_TEXT_BASE
 
diff --git a/include/configs/mcx.h b/include/configs/mcx.h
index 4619dfb..56102f5 100644
--- a/include/configs/mcx.h
+++ b/include/configs/mcx.h
@@ -353,7 +353,6 @@
 #define CONFIG_SPL_FRAMEWORK
 #define CONFIG_SPL_BOARD_INIT
 #define CONFIG_SPL_NAND_SIMPLE
-#define CONFIG_SPL_NAND_SOFTECC
 
 #define CONFIG_SPL_LIBCOMMON_SUPPORT
 #define CONFIG_SPL_LIBDISK_SUPPORT
@@ -395,6 +394,7 @@
 					 56, 57, 58, 59, 60, 61, 62, 63}
 #define CONFIG_SYS_NAND_ECCSIZE		256
 #define CONFIG_SYS_NAND_ECCBYTES	3
+#define CONFIG_NAND_OMAP_ECCSCHEME	OMAP_ECC_HAM1_CODE_SW
 
 #define CONFIG_SYS_NAND_U_BOOT_START   CONFIG_SYS_TEXT_BASE
 
diff --git a/include/configs/omap3_beagle.h b/include/configs/omap3_beagle.h
index 47d9902..8b68635 100644
--- a/include/configs/omap3_beagle.h
+++ b/include/configs/omap3_beagle.h
@@ -432,6 +432,7 @@
 						10, 11, 12, 13}
 #define CONFIG_SYS_NAND_ECCSIZE		512
 #define CONFIG_SYS_NAND_ECCBYTES	3
+#define CONFIG_NAND_OMAP_ECCSCHEME	OMAP_ECC_HAM1_CODE_HW
 #define CONFIG_SYS_NAND_U_BOOT_START	CONFIG_SYS_TEXT_BASE
 #define CONFIG_SYS_NAND_U_BOOT_OFFS	0x80000
 
diff --git a/include/configs/omap3_evm.h b/include/configs/omap3_evm.h
index 3ace8bb..b7638fb 100644
--- a/include/configs/omap3_evm.h
+++ b/include/configs/omap3_evm.h
@@ -107,6 +107,7 @@
 						10, 11, 12, 13}
 #define CONFIG_SYS_NAND_ECCSIZE		512
 #define CONFIG_SYS_NAND_ECCBYTES	3
+#define CONFIG_NAND_OMAP_ECCSCHEME	OMAP_ECC_HAM1_CODE_HW
 #define CONFIG_SYS_NAND_U_BOOT_START   CONFIG_SYS_TEXT_BASE
 #define CONFIG_SYS_NAND_U_BOOT_OFFS	0x80000
 
diff --git a/include/configs/omap3_evm_quick_nand.h b/include/configs/omap3_evm_quick_nand.h
index 9ecd70d..4427e88 100644
--- a/include/configs/omap3_evm_quick_nand.h
+++ b/include/configs/omap3_evm_quick_nand.h
@@ -86,6 +86,7 @@
 						10, 11, 12, 13}
 #define CONFIG_SYS_NAND_ECCSIZE		512
 #define CONFIG_SYS_NAND_ECCBYTES	3
+#define CONFIG_NAND_OMAP_ECCSCHEME	OMAP_ECC_HAM1_CODE_HW
 #define CONFIG_SYS_NAND_U_BOOT_START   CONFIG_SYS_TEXT_BASE
 #define CONFIG_SYS_NAND_U_BOOT_OFFS	0x80000
 
diff --git a/include/configs/omap3_igep00x0.h b/include/configs/omap3_igep00x0.h
index ac36ac6..cdaa9ba 100644
--- a/include/configs/omap3_igep00x0.h
+++ b/include/configs/omap3_igep00x0.h
@@ -362,6 +362,7 @@
 						10, 11, 12, 13}
 #define CONFIG_SYS_NAND_ECCSIZE		512
 #define CONFIG_SYS_NAND_ECCBYTES	3
+#define CONFIG_NAND_OMAP_ECCSCHEME	OMAP_ECC_HAM1_CODE_HW
 #define CONFIG_SYS_NAND_U_BOOT_START	CONFIG_SYS_TEXT_BASE
 #define CONFIG_SYS_NAND_U_BOOT_OFFS	0x80000
 #endif
diff --git a/include/configs/omap3_overo.h b/include/configs/omap3_overo.h
index 4641694..00d7c6c 100644
--- a/include/configs/omap3_overo.h
+++ b/include/configs/omap3_overo.h
@@ -325,6 +325,7 @@
 						10, 11, 12, 13}
 #define CONFIG_SYS_NAND_ECCSIZE		512
 #define CONFIG_SYS_NAND_ECCBYTES	3
+#define CONFIG_NAND_OMAP_ECCSCHEME	OMAP_ECC_HAM1_CODE_HW
 #define CONFIG_SYS_NAND_U_BOOT_START	CONFIG_SYS_TEXT_BASE
 #define CONFIG_SYS_NAND_U_BOOT_OFFS	0x80000
 
diff --git a/include/configs/siemens-am33x-common.h b/include/configs/siemens-am33x-common.h
index f3b4197..e394478 100644
--- a/include/configs/siemens-am33x-common.h
+++ b/include/configs/siemens-am33x-common.h
@@ -196,6 +196,7 @@
 
 #define CONFIG_SYS_NAND_ECCSIZE		512
 #define CONFIG_SYS_NAND_ECCBYTES	14
+#define CONFIG_NAND_OMAP_ECCSCHEME	OMAP_ECC_BCH8_CODE_HW
 
 #define CONFIG_SYS_NAND_ECCSTEPS	4
 #define	CONFIG_SYS_NAND_ECCTOTAL	(CONFIG_SYS_NAND_ECCBYTES * \
diff --git a/include/configs/tam3517-common.h b/include/configs/tam3517-common.h
index 683bc54..48698b5 100644
--- a/include/configs/tam3517-common.h
+++ b/include/configs/tam3517-common.h
@@ -225,7 +225,6 @@
 #define CONFIG_SPL_BOARD_INIT
 #define CONFIG_SPL_CONSOLE
 #define CONFIG_SPL_NAND_SIMPLE
-#define CONFIG_SPL_NAND_SOFTECC
 #define CONFIG_SPL_NAND_WORKSPACE	0x8f07f000 /* below BSS */
 
 #define CONFIG_SPL_LIBCOMMON_SUPPORT
@@ -262,6 +261,7 @@
 					 56, 57, 58, 59, 60, 61, 62, 63}
 #define CONFIG_SYS_NAND_ECCSIZE		256
 #define CONFIG_SYS_NAND_ECCBYTES	3
+#define CONFIG_NAND_OMAP_ECCSCHEME	OMAP_ECC_HAM1_CODE_SW
 
 #define CONFIG_SYS_NAND_U_BOOT_START	CONFIG_SYS_TEXT_BASE
 
diff --git a/include/configs/tricorder.h b/include/configs/tricorder.h
index 590eab7..3ca1fd0 100644
--- a/include/configs/tricorder.h
+++ b/include/configs/tricorder.h
@@ -138,7 +138,6 @@
 
 #define CONFIG_SYS_MAX_NAND_DEVICE	1		/* Max number of NAND */
 							/* devices */
-#define CONFIG_NAND_OMAP_BCH8
 #define CONFIG_BCH
 #define CONFIG_SYS_NAND_MAX_OOBFREE	2
 #define CONFIG_SYS_NAND_MAX_ECCPOS	56
@@ -376,6 +375,7 @@
 
 #define CONFIG_SYS_NAND_ECCSIZE		512
 #define CONFIG_SYS_NAND_ECCBYTES	13
+#define CONFIG_NAND_OMAP_ECCSCHEME	OMAP_ECC_BCH8_CODE_HW_DETECTION_SW
 
 #define CONFIG_SYS_NAND_U_BOOT_START	CONFIG_SYS_TEXT_BASE