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| author | Johan Jonker <jbx6244@gmail.com> | 2023-06-22 15:59:24 +0200 |
|---|---|---|
| committer | Kever Yang <kever.yang@rock-chips.com> | 2023-07-28 18:45:03 +0800 |
| commit | 3d17ee453348f49a975ea9a0c399258c01a160ed (patch) | |
| tree | 0d65830d71f3e1de96a08d4e0fe55a90d2c32696 | |
| parent | 9010c43b038f81d5282e51c723a673a25a0fb6b3 (diff) | |
| download | u-boot-3d17ee453348f49a975ea9a0c399258c01a160ed.zip u-boot-3d17ee453348f49a975ea9a0c399258c01a160ed.tar.gz u-boot-3d17ee453348f49a975ea9a0c399258c01a160ed.tar.bz2 | |
mtd: nand: raw: rockchip_nfc: copy hwecc PA data to oob_poi buffer
Rockchip boot blocks are written per 4 x 512 byte sectors per page.
Each page must have a page address (PA) pointer in OOB to the next page.
Pages are written in a pattern depending on the NAND chip ID.
This logic used to build a page pattern table is not fully disclosed and
is not easy to fit in the MTD framework.
The formula in rk_nfc_write_page_hwecc() function is not correct.
Make hwecc and raw behavior identical.
Generate boot block page address and pattern for hwecc in user space
and copy PA data to/from the already reserved last 4 bytes before EEC
in the chip->oob_poi data layout.
Signed-off-by: Johan Jonker <jbx6244@gmail.com>
Reviewed-by: Kever Yang <kever.yang@rock-chips.com>
| -rw-r--r-- | drivers/mtd/nand/raw/rockchip_nfc.c | 34 |
1 files changed, 21 insertions, 13 deletions
diff --git a/drivers/mtd/nand/raw/rockchip_nfc.c b/drivers/mtd/nand/raw/rockchip_nfc.c index 5fcf6a6..274489e 100644 --- a/drivers/mtd/nand/raw/rockchip_nfc.c +++ b/drivers/mtd/nand/raw/rockchip_nfc.c @@ -525,7 +525,7 @@ static int rk_nfc_write_page_hwecc(struct mtd_info *mtd, int pages_per_blk = mtd->erasesize / mtd->writesize; int ret = 0, i, boot_rom_mode = 0; dma_addr_t dma_data, dma_oob; - u32 reg; + u32 tmp; u8 *oob; nand_prog_page_begin_op(chip, page, 0, NULL, 0); @@ -552,6 +552,13 @@ static int rk_nfc_write_page_hwecc(struct mtd_info *mtd, * * 0xFF 0xFF 0xFF 0xFF | BBM OOB1 OOB2 OOB3 | ... * + * The code here just swaps the first 4 bytes with the last + * 4 bytes without losing any data. + * + * The chip->oob_poi data layout: + * + * BBM OOB1 OOB2 OOB3 |......| PA0 PA1 PA2 PA3 + * * Configure the ECC algorithm supported by the boot ROM. */ if (page < (pages_per_blk * rknand->boot_blks)) { @@ -561,21 +568,17 @@ static int rk_nfc_write_page_hwecc(struct mtd_info *mtd, } for (i = 0; i < ecc->steps; i++) { - if (!i) { - reg = 0xFFFFFFFF; - } else { + if (!i) + oob = chip->oob_poi + (ecc->steps - 1) * NFC_SYS_DATA_SIZE; + else oob = chip->oob_poi + (i - 1) * NFC_SYS_DATA_SIZE; - reg = oob[0] | oob[1] << 8 | oob[2] << 16 | - oob[3] << 24; - } - if (!i && boot_rom_mode) - reg = (page & (pages_per_blk - 1)) * 4; + tmp = oob[0] | oob[1] << 8 | oob[2] << 16 | oob[3] << 24; if (nfc->cfg->type == NFC_V9) - nfc->oob_buf[i] = reg; + nfc->oob_buf[i] = tmp; else - nfc->oob_buf[i * (oob_step / 4)] = reg; + nfc->oob_buf[i * (oob_step / 4)] = tmp; } dma_data = dma_map_single((void *)nfc->page_buf, @@ -720,12 +723,17 @@ static int rk_nfc_read_page_hwecc(struct mtd_info *mtd, goto timeout_err; } - for (i = 1; i < ecc->steps; i++) { - oob = chip->oob_poi + (i - 1) * NFC_SYS_DATA_SIZE; + for (i = 0; i < ecc->steps; i++) { + if (!i) + oob = chip->oob_poi + (ecc->steps - 1) * NFC_SYS_DATA_SIZE; + else + oob = chip->oob_poi + (i - 1) * NFC_SYS_DATA_SIZE; + if (nfc->cfg->type == NFC_V9) tmp = nfc->oob_buf[i]; else tmp = nfc->oob_buf[i * (oob_step / 4)]; + *oob++ = (u8)tmp; *oob++ = (u8)(tmp >> 8); *oob++ = (u8)(tmp >> 16); |