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 enum mtk_ecc_mode {ECC_DMA_MODE = 0, ECC_NFI_MODE = 1};
  18 enum mtk_ecc_operation {ECC_ENCODE, ECC_DECODE};
  19
  20 struct device_node;
  21 struct mtk_ecc;
  22
  23 struct mtk_ecc_stats {
  24         u32 corrected;
  25         u32 bitflips;
  26         u32 failed;
  27 };
  28
  29 struct mtk_ecc_config {
  30         enum mtk_ecc_operation op;
  31         enum mtk_ecc_mode mode;
  32         dma_addr_t addr;
  33         u32 strength;
  34         u32 sectors;
  35         u32 len;
  36 };
  37
  38 int mtk_ecc_encode(struct mtk_ecc *, struct mtk_ecc_config *, u8 *, u32);
  39 void mtk_ecc_get_stats(struct mtk_ecc *, struct mtk_ecc_stats *, int);
  40 int mtk_ecc_wait_done(struct mtk_ecc *, enum mtk_ecc_operation);
  41 int mtk_ecc_enable(struct mtk_ecc *, struct mtk_ecc_config *);
  42 void mtk_ecc_disable(struct mtk_ecc *);
  43 void mtk_ecc_adjust_strength(struct mtk_ecc *ecc, u32 *p);
  44 unsigned int mtk_ecc_get_parity_bits(struct mtk_ecc *ecc);
  45
  46 struct mtk_ecc *of_mtk_ecc_get(struct device_node *);
  47 void mtk_ecc_release(struct mtk_ecc *);
  48
  49 #endif