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 */
39static inline 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
46static inline 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
53static inline void ingenic_ecc_release(struct ingenic_ecc *ecc)
54{
55}
56
57static inline 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
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