[U-Boot] [PATCH v2 3/7] mtd: nand: omap_elm: use macros for register definitions

Pekon Gupta
2014-04-11T07:25:31Z

This patch adds macros for following parameters of ELM Hardware engine
- ELM_MAX_CHANNELS: ELM can process 8 data streams simultaneously
- ELM_MAX_ERRORS: ELM can detect upto 16 ECC error when using BCH16 scheme

Signed-off-by: Pekon Gupta <pekon@ti.com>
Reviewed-by: Stefan Roese <sr@denx.de>
---
include/linux/mtd/omap_elm.h | 9 ++++++---
1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/include/linux/mtd/omap_elm.h b/include/linux/mtd/omap_elm.h
index a6e9591..b8096b0 100644
--- a/include/linux/mtd/omap_elm.h
+++ b/include/linux/mtd/omap_elm.h
@@ -24,6 +24,9 @@
#define ELM_LOCATION_STATUS_ECC_CORRECTABLE_MASK (0x100)
#define ELM_LOCATION_STATUS_ECC_NB_ERRORS_MASK (0x1F)

+#define ELM_MAX_CHANNELS 8
+#define ELM_MAX_ERROR_COUNT 16
+
#ifndef __ASSEMBLY__

enum bch_level {
@@ -43,7 +46,7 @@ struct syndrome {
struct location {
u32 location_status; /* 0x800 */
u8 res1[124]; /* 0x804 */
- u32 error_location_x[16]; /* 0x880.... */
+ u32 error_location_x[ELM_MAX_ERROR_COUNT]; /* 0x880, 0x980, .. */
u8 res2[64]; /* 0x8c0 */
};

@@ -63,9 +66,9 @@ struct elm {
u8 res2[92]; /* 0x024 */
u32 page_ctrl; /* 0x080 */
u8 res3[892]; /* 0x084 */
- struct syndrome syndrome_fragments[8]; /* 0x400 */
+ struct syndrome syndrome_fragments[ELM_MAX_CHANNELS]; /* 0x400,0x420 */
u8 res4[512]; /* 0x600 */
- struct location error_location[8]; /* 0x800 */
+ struct location error_location[ELM_MAX_CHANNELS]; /* 0x800,0x900 ... */
};

int elm_check_error(u8 *syndrome, enum bch_level bch_type, u32 *error_count,
--
1.8.5.1.163.gd7aced9