drivers/mtd/nand/mtk_ecc.h

   1 /*
   2  * MTK SDG1 ECC controller
   3  *
   4  * Copyright (c) 2016 Mediatek
   5  * Authors:     Xiaolei Li              <xiaolei.li@mediatek.com>
   6  *              Jorge Ramirez-Ortiz     <jorge.ramirez-ortiz@linaro.org>
   7  * This program is free software; you can redistribute it and/or modify it
   8  * under the terms of the GNU General Public License version 2 as published
   9  * by the Free Software Foundation.
  10  */
  11
  12 #ifndef __DRIVERS_MTD_NAND_MTK_ECC_H__
  13 #define __DRIVERS_MTD_NAND_MTK_ECC_H__
  14
  15 #include <linux/types.h>
  16
  17 #define ECC_PARITY_BITS         (14)
  18
  19 enum mtk_ecc_mode {ECC_DMA_MODE = 0, ECC_NFI_MODE = 1};
  20 enum mtk_ecc_operation {ECC_ENCODE, ECC_DECODE};
  21
  22 struct device_node;
  23 struct mtk_ecc;
  24
  25 struct mtk_ecc_stats {
  26         u32 corrected;
  27         u32 bitflips;
  28         u32 failed;
  29 };
  30
  31 struct mtk_ecc_config {
  32         enum mtk_ecc_operation op;
  33         enum mtk_ecc_mode mode;
  34         dma_addr_t addr;
  35         u32 strength;
  36         u32 sectors;
  37         u32 len;
  38 };
  39
  40 int mtk_ecc_encode(struct mtk_ecc *, struct mtk_ecc_config *, u8 *, u32);
  41 void mtk_ecc_get_stats(struct mtk_ecc *, struct mtk_ecc_stats *, int);
  42 int mtk_ecc_wait_done(struct mtk_ecc *, enum mtk_ecc_operation);
  43 int mtk_ecc_enable(struct mtk_ecc *, struct mtk_ecc_config *);
  44 void mtk_ecc_disable(struct mtk_ecc *);
  45 void mtk_ecc_adjust_strength(struct mtk_ecc *ecc, u32 *p);
  46
  47 struct mtk_ecc *of_mtk_ecc_get(struct device_node *);
  48 void mtk_ecc_release(struct mtk_ecc *);
  49
  50 #endif