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 */
ingenic_ecc_calculate(struct ingenic_ecc * ecc,struct ingenic_ecc_params * params,const u8 * buf,u8 * ecc_code)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
ingenic_ecc_correct(struct ingenic_ecc * ecc,struct ingenic_ecc_params * params,u8 * buf,u8 * ecc_code)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
ingenic_ecc_release(struct ingenic_ecc * ecc)53 void ingenic_ecc_release(struct ingenic_ecc *ecc)
54 {
55 }
56
of_ingenic_ecc_get(struct device_node * np)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__ */
84