1STRUCT NAND_ECC_CTRL(9)           Structures           STRUCT NAND_ECC_CTRL(9)
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NAME

6       struct_nand_ecc_ctrl - Control structure for ECC
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SYNOPSIS

9       struct nand_ecc_ctrl {
10         nand_ecc_modes_t mode;
11         int steps;
12         int size;
13         int bytes;
14         int total;
15         int strength;
16         int prepad;
17         int postpad;
18         struct nand_ecclayout * layout;
19         void * priv;
20         void (* hwctl) (struct mtd_info *mtd, int mode);
21         int (* calculate) (struct mtd_info *mtd, const uint8_t *dat,uint8_t *ecc_code);
22         int (* correct) (struct mtd_info *mtd, uint8_t *dat, uint8_t *read_ecc,uint8_t *calc_ecc);
23         int (* read_page_raw) (struct mtd_info *mtd, struct nand_chip *chip,uint8_t *buf, int oob_required, int page);
24         int (* write_page_raw) (struct mtd_info *mtd, struct nand_chip *chip,const uint8_t *buf, int oob_required);
25         int (* read_page) (struct mtd_info *mtd, struct nand_chip *chip,uint8_t *buf, int oob_required, int page);
26         int (* read_subpage) (struct mtd_info *mtd, struct nand_chip *chip,uint32_t offs, uint32_t len, uint8_t *buf);
27         int (* write_subpage) (struct mtd_info *mtd, struct nand_chip *chip,uint32_t offset, uint32_t data_len,const uint8_t *data_buf, int oob_required);
28         int (* write_page) (struct mtd_info *mtd, struct nand_chip *chip,const uint8_t *buf, int oob_required);
29         int (* write_oob_raw) (struct mtd_info *mtd, struct nand_chip *chip,int page);
30         int (* read_oob_raw) (struct mtd_info *mtd, struct nand_chip *chip,int page);
31         int (* read_oob) (struct mtd_info *mtd, struct nand_chip *chip, int page);
32         int (* write_oob) (struct mtd_info *mtd, struct nand_chip *chip,int page);
33       };
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MEMBERS

36       mode
37           ECC mode
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39       steps
40           number of ECC steps per page
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42       size
43           data bytes per ECC step
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45       bytes
46           ECC bytes per step
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48       total
49           total number of ECC bytes per page
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51       strength
52           max number of correctible bits per ECC step
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54       prepad
55           padding information for syndrome based ECC generators
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57       postpad
58           padding information for syndrome based ECC generators
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60       layout
61           ECC layout control struct pointer
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63       priv
64           pointer to private ECC control data
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66       hwctl
67           function to control hardware ECC generator. Must only be provided
68           if an hardware ECC is available
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70       calculate
71           function for ECC calculation or readback from ECC hardware
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73       correct
74           function for ECC correction, matching to ECC generator (sw/hw)
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76       read_page_raw
77           function to read a raw page without ECC
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79       write_page_raw
80           function to write a raw page without ECC
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82       read_page
83           function to read a page according to the ECC generator
84           requirements; returns maximum number of bitflips corrected in any
85           single ECC step, 0 if bitflips uncorrectable, -EIO hw error
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87       read_subpage
88           function to read parts of the page covered by ECC; returns same as
89           read_page
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91       write_subpage
92           function to write parts of the page covered by ECC.
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94       write_page
95           function to write a page according to the ECC generator
96           requirements.
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98       write_oob_raw
99           function to write chip OOB data without ECC
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101       read_oob_raw
102           function to read chip OOB data without ECC
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104       read_oob
105           function to read chip OOB data
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107       write_oob
108           function to write chip OOB data
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AUTHOR

111       Thomas Gleixner <tglx@linutronix.de>
112           Author.
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115Kernel Hackers Manual 3.10         June 2019           STRUCT NAND_ECC_CTRL(9)
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