diff options
Diffstat (limited to 'target/linux/generic/files/drivers/mtd/nand/mtk_bmt.h')
| -rw-r--r-- | target/linux/generic/files/drivers/mtd/nand/mtk_bmt.h | 124 |
1 files changed, 124 insertions, 0 deletions
diff --git a/target/linux/generic/files/drivers/mtd/nand/mtk_bmt.h b/target/linux/generic/files/drivers/mtd/nand/mtk_bmt.h new file mode 100644 index 0000000000..25bdb40d9b --- /dev/null +++ b/target/linux/generic/files/drivers/mtd/nand/mtk_bmt.h @@ -0,0 +1,124 @@ +#ifndef __MTK_BMT_PRIV_H +#define __MTK_BMT_PRIV_H + +#include <linux/kernel.h> +#include <linux/of.h> +#include <linux/mtd/mtd.h> +#include <linux/mtd/partitions.h> +#include <linux/mtd/mtk_bmt.h> +#include <linux/debugfs.h> + +#define MAIN_SIGNATURE_OFFSET 0 +#define OOB_SIGNATURE_OFFSET 1 + +#define BBT_LOG(fmt, ...) pr_debug("[BBT][%s|%d] "fmt"\n", __func__, __LINE__, ##__VA_ARGS__) + +struct mtk_bmt_ops { + char *sig; + unsigned int sig_len; + int (*init)(struct device_node *np); + bool (*remap_block)(u16 block, u16 mapped_block, int copy_len); + void (*unmap_block)(u16 block); + u16 (*get_mapping_block)(int block); + int (*debug)(void *data, u64 val); +}; + +struct bmt_desc { + struct mtd_info *mtd; + unsigned char *bbt_buf; + unsigned char *data_buf; + + int (*_read_oob) (struct mtd_info *mtd, loff_t from, + struct mtd_oob_ops *ops); + int (*_write_oob) (struct mtd_info *mtd, loff_t to, + struct mtd_oob_ops *ops); + int (*_erase) (struct mtd_info *mtd, struct erase_info *instr); + int (*_block_isbad) (struct mtd_info *mtd, loff_t ofs); + int (*_block_markbad) (struct mtd_info *mtd, loff_t ofs); + + const struct mtk_bmt_ops *ops; + + struct bbbt *bbt; + + struct dentry *debugfs_dir; + + u32 table_size; + u32 pg_size; + u32 blk_size; + u16 pg_shift; + u16 blk_shift; + /* bbt logical address */ + u16 pool_lba; + /* bbt physical address */ + u16 pool_pba; + /* Maximum count of bad blocks that the vendor guaranteed */ + u16 bb_max; + /* Total blocks of the Nand Chip */ + u16 total_blks; + /* The block(n) BMT is located at (bmt_tbl[n]) */ + u16 bmt_blk_idx; + /* How many pages needs to store 'struct bbbt' */ + u32 bmt_pgs; + + const __be32 *remap_range; + int remap_range_len; + + /* to compensate for driver level remapping */ + u8 oob_offset; +}; + +extern struct bmt_desc bmtd; +extern const struct mtk_bmt_ops mtk_bmt_v2_ops; +extern const struct mtk_bmt_ops mtk_bmt_bbt_ops; + +static inline u32 blk_pg(u16 block) +{ + return (u32)(block << (bmtd.blk_shift - bmtd.pg_shift)); +} + +static inline int +bbt_nand_read(u32 page, unsigned char *dat, int dat_len, + unsigned char *fdm, int fdm_len) +{ + struct mtd_oob_ops ops = { + .mode = MTD_OPS_PLACE_OOB, + .ooboffs = bmtd.oob_offset, + .oobbuf = fdm, + .ooblen = fdm_len, + .datbuf = dat, + .len = dat_len, + }; + + return bmtd._read_oob(bmtd.mtd, page << bmtd.pg_shift, &ops); +} + +static inline int bbt_nand_erase(u16 block) +{ + struct mtd_info *mtd = bmtd.mtd; + struct erase_info instr = { + .addr = (loff_t)block << bmtd.blk_shift, + .len = bmtd.blk_size, + }; + + return bmtd._erase(mtd, &instr); +} + +static inline int write_bmt(u16 block, unsigned char *dat) +{ + struct mtd_oob_ops ops = { + .mode = MTD_OPS_PLACE_OOB, + .ooboffs = OOB_SIGNATURE_OFFSET + bmtd.oob_offset, + .oobbuf = bmtd.ops->sig, + .ooblen = bmtd.ops->sig_len, + .datbuf = dat, + .len = bmtd.bmt_pgs << bmtd.pg_shift, + }; + loff_t addr = (loff_t)block << bmtd.blk_shift; + + return bmtd._write_oob(bmtd.mtd, addr, &ops); +} + +int bbt_nand_copy(u16 dest_blk, u16 src_blk, loff_t max_offset); +bool mapping_block_in_range(int block, int *start, int *end); + +#endif |