LXR linux/drivers/mtd/nand/raw/ingenic/ingenic

   1/* SPDX-License-Identifier: GPL-2.0 */
   2#ifndef __DRIVERS_MTD_NAND_INGENIC_ECC_INTERNAL_H__
   3#define __DRIVERS_MTD_NAND_INGENIC_ECC_INTERNAL_H__
   4
   5#include <linux/compiler_types.h>
   6#include <linux/err.h>
   7#include <linux/mutex.h>
   8#include <linux/types.h>
   9#include <uapi/asm-generic/errno-base.h>
  10
  11struct clk;
  12struct device;
  13struct ingenic_ecc;
  14struct platform_device;
  15
  16/**
  17 * struct ingenic_ecc_params - ECC parameters
  18 * @size: data bytes per ECC step.
  19 * @bytes: ECC bytes per step.
  20 * @strength: number of correctable bits per ECC step.
  21 */
  22struct ingenic_ecc_params {
  23        int size;
  24        int bytes;
  25        int strength;
  26};
  27
  28#if IS_ENABLED(CONFIG_MTD_NAND_INGENIC_ECC)
  29int ingenic_ecc_calculate(struct ingenic_ecc *ecc,
  30                          struct ingenic_ecc_params *params,
  31                          const u8 *buf, u8 *ecc_code);
  32int ingenic_ecc_correct(struct ingenic_ecc *ecc,
  33                        struct ingenic_ecc_params *params, u8 *buf,
  34                        u8 *ecc_code);
  35
  36void ingenic_ecc_release(struct ingenic_ecc *ecc);
  37struct ingenic_ecc *of_ingenic_ecc_get(struct device_node *np);
  38#else /* CONFIG_MTD_NAND_INGENIC_ECC */
  39int ingenic_ecc_calculate(struct ingenic_ecc *ecc,
  40                          struct ingenic_ecc_params *params,
  41                          const u8 *buf, u8 *ecc_code)
  42{
  43        return -ENODEV;
  44}
  45
  46int ingenic_ecc_correct(struct ingenic_ecc *ecc,
  47                        struct ingenic_ecc_params *params, u8 *buf,
  48                        u8 *ecc_code)
  49{
  50        return -ENODEV;
  51}
  52
  53void ingenic_ecc_release(struct ingenic_ecc *ecc)
  54{
  55}
  56
  57struct ingenic_ecc *of_ingenic_ecc_get(struct device_node *np)
  58{
  59        return ERR_PTR(-ENODEV);
  60}
  61#endif /* CONFIG_MTD_NAND_INGENIC_ECC */
  62
  63struct ingenic_ecc_ops {
  64        void (*disable)(struct ingenic_ecc *ecc);
  65        int (*calculate)(struct ingenic_ecc *ecc,
  66                         struct ingenic_ecc_params *params,
  67                         const u8 *buf, u8 *ecc_code);
  68        int (*correct)(struct ingenic_ecc *ecc,
  69                        struct ingenic_ecc_params *params,
  70                        u8 *buf, u8 *ecc_code);
  71};
  72
  73struct ingenic_ecc {
  74        struct device *dev;
  75        const struct ingenic_ecc_ops *ops;
  76        void __iomem *base;
  77        struct clk *clk;
  78        struct mutex lock;
  79};
  80
  81int ingenic_ecc_probe(struct platform_device *pdev);
  82
  83#endif /* __DRIVERS_MTD_NAND_INGENIC_ECC_INTERNAL_H__ */
  84