drivers/mtd/nand/raw/ingenic/ingenic_ecc.h

   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
  11 struct clk;
  12 struct device;
  13 struct ingenic_ecc;
  14 struct 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  */
  22 struct ingenic_ecc_params {
  23         int size;
  24         int bytes;
  25         int strength;
  26 };
  27
  28 #if IS_ENABLED(CONFIG_MTD_NAND_INGENIC_ECC)
  29 int ingenic_ecc_calculate(struct ingenic_ecc *ecc,
  30                           struct ingenic_ecc_params *params,
  31                           const u8 *buf, u8 *ecc_code);
  32 int ingenic_ecc_correct(struct ingenic_ecc *ecc,
  33                         struct ingenic_ecc_params *params, u8 *buf,
  34                         u8 *ecc_code);
  35
  36 void ingenic_ecc_release(struct ingenic_ecc *ecc);
  37 struct ingenic_ecc *of_ingenic_ecc_get(struct device_node *np);
  38 #else /* CONFIG_MTD_NAND_INGENIC_ECC */
  39 int 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
  46 int 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
  53 void ingenic_ecc_release(struct ingenic_ecc *ecc)
  54 {
  55 }
  56
  57 struct 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
  63 struct 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
  73 struct 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
  81 int ingenic_ecc_probe(struct platform_device *pdev);
  82
  83 #endif /* __DRIVERS_MTD_NAND_INGENIC_ECC_INTERNAL_H__ */