diff options
Diffstat (limited to 'target')
| -rw-r--r-- | target/linux/generic/files/drivers/mtd/nand/mtk_bmt.c | 36 |
1 files changed, 29 insertions, 7 deletions
diff --git a/target/linux/generic/files/drivers/mtd/nand/mtk_bmt.c b/target/linux/generic/files/drivers/mtd/nand/mtk_bmt.c index cb74b4d10f..14fbd246d7 100644 --- a/target/linux/generic/files/drivers/mtd/nand/mtk_bmt.c +++ b/target/linux/generic/files/drivers/mtd/nand/mtk_bmt.c @@ -90,6 +90,9 @@ static struct bmt_desc { /* 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; } bmtd = {0}; @@ -458,17 +461,32 @@ static bool update_bmt(u16 block, int copy_len) return true; } +static bool +mapping_block_in_range(int block) +{ + const __be32 *cur = bmtd.remap_range; + u32 addr = block << bmtd.blk_shift; + int i; + + if (!cur || !bmtd.remap_range_len) + return true; + + for (i = 0; i < bmtd.remap_range_len; i++, cur += 2) + if (addr >= be32_to_cpu(cur[0]) && addr < be32_to_cpu(cur[1])) + return true; + + return false; +} + u16 get_mapping_block_index(int block) { - int mapping_block; + if (block >= bmtd.pool_lba) + return block; - if (block < bmtd.pool_lba) - mapping_block = bmtd.bbt->bb_tbl[block]; - else - mapping_block = block; - BBT_LOG("0x%x mapped to 0x%x", block, mapping_block); + if (!mapping_block_in_range(block)) + return block; - return mapping_block; + return bmtd.bbt->bb_tbl[block]; } static int @@ -839,6 +857,10 @@ int mtk_bmt_attach(struct mtd_info *mtd) &bmt_table_size) != 0) bmt_table_size = 0x2000U; + bmtd.remap_range = of_get_property(np, "mediatek,bmt-remap-range", + &bmtd.remap_range_len); + bmtd.remap_range_len /= 8; + bmtd.mtd = mtd; mtk_bmt_replace_ops(mtd); |