return geo->ecc_strength <= this->devdata->bch_max_ecc_strength;
}
+static inline bool bbm_in_data_chunk(struct gpmi_nand_data *this,
+ unsigned int *chunk_num)
+{
+ struct bch_geometry *geo = &this->bch_geometry;
+ struct mtd_info *mtd = &this->nand.mtd;
+ unsigned int i, j;
+
+ if (geo->ecc_chunk0_size != geo->ecc_chunk0_size) {
+ dev_err(this->dev, "The size of chunk0 must equal to chunkn\n");
+ return false;
+ }
+
+ i = (mtd->writesize * 8 - geo->metadata_size * 8) /
+ (geo->gf_len * geo->ecc_strength +
+ geo->ecc_chunkn_size * 8);
+
+ j = (mtd->writesize * 8 - geo->metadata_size * 8) -
+ (geo->gf_len * geo->ecc_strength +
+ geo->ecc_chunkn_size * 8) * i;
+
+ if (j < geo->ecc_chunkn_size * 8) {
+ *chunk_num = i+1;
+ dev_dbg(this->dev, "Set ecc to %d and bbm in chunk %d\n",
+ geo->ecc_strength, *chunk_num);
+ return true;
+ }
+
+ return false;
+}
+
/*
* If we can get the ECC information from the nand chip, we do not
* need to calculate them ourselves.
chip->ecc_strength_ds, chip->ecc_step_ds);
return -EINVAL;
}
- geo->ecc_chunk_size = chip->ecc_step_ds;
+ geo->ecc_chunk0_size = chip->ecc_step_ds;
+ geo->ecc_chunkn_size = chip->ecc_step_ds;
geo->ecc_strength = round_up(chip->ecc_strength_ds, 2);
if (!gpmi_check_ecc(this))
return -EINVAL;
- /* set the ecc strength to the maximum ecc controller can support */
- geo->ecc_strength = this->devdata->bch_max_ecc_strength;
/* Keep the C >= O */
- if (geo->ecc_chunk_size < mtd->oobsize) {
+ if (geo->ecc_chunkn_size < mtd->oobsize) {
dev_err(this->dev,
"unsupported nand chip. ecc size: %d, oob size : %d\n",
chip->ecc_step_ds, mtd->oobsize);
/* The default value, see comment in the legacy_set_geometry(). */
geo->metadata_size = 10;
- geo->ecc_chunk_count = mtd->writesize / geo->ecc_chunk_size;
+ geo->ecc_chunk_count = mtd->writesize / geo->ecc_chunkn_size;
/*
* Now, the NAND chip with 2K page(data chunk is 512byte) shows below:
return 0;
}
+static int set_geometry_for_large_oob(struct gpmi_nand_data *this)
+{
+ struct bch_geometry *geo = &this->bch_geometry;
+ struct mtd_info *mtd = &this->nand.mtd;
+ struct nand_chip *chip = mtd->priv;
+ unsigned int block_mark_bit_offset;
+ unsigned int max_ecc;
+ unsigned int bbm_chunk;
+ unsigned int i;
+
+
+ /* sanity check for the minimum ecc nand required */
+ if (!(chip->ecc_strength_ds > 0 && chip->ecc_step_ds > 0))
+ return -EINVAL;
+ geo->ecc_strength = chip->ecc_strength_ds;
+
+ /* check if platform can support this nand */
+ if (!gpmi_check_ecc(this)) {
+ dev_err(this->dev,
+ "unsupported NAND chip,\
+ minimum ecc required %d\n"
+ , geo->ecc_strength);
+ return -EINVAL;
+ }
+
+ /* calculate the maximum ecc platform can support*/
+ geo->metadata_size = 10;
+ geo->gf_len = 14;
+ geo->ecc_chunk0_size = 1024;
+ geo->ecc_chunkn_size = 1024;
+ geo->ecc_chunk_count = mtd->writesize / geo->ecc_chunkn_size;
+ max_ecc = min(get_ecc_strength(this),
+ this->devdata->bch_max_ecc_strength);
+
+ /* search a supported ecc strength that makes bbm */
+ /* located in data chunk */
+ geo->ecc_strength = chip->ecc_strength_ds;
+ while (!(geo->ecc_strength > max_ecc)) {
+ if (bbm_in_data_chunk(this, &bbm_chunk))
+ goto geo_setting;
+ geo->ecc_strength += 2;
+ }
+
+ /* if none of them works, keep using the minimum ecc */
+ /* nand required but changing ecc page layout */
+ geo->ecc_strength = chip->ecc_strength_ds;
+ /* add extra ecc for meta data */
+ geo->ecc_chunk0_size = 0;
+ geo->ecc_chunk_count = (mtd->writesize / geo->ecc_chunkn_size) + 1;
+ geo->ecc_for_meta = 1;
+ /* check if oob can afford this extra ecc chunk */
+ if (mtd->oobsize * 8 < geo->metadata_size * 8 +
+ geo->gf_len * geo->ecc_strength
+ * geo->ecc_chunk_count) {
+ dev_err(this->dev, "unsupported NAND chip with new layout\n");
+ return -EINVAL;
+ }
+
+ /* calculate in which chunk bbm located */
+ bbm_chunk = (mtd->writesize * 8 - geo->metadata_size * 8 -
+ geo->gf_len * geo->ecc_strength) /
+ (geo->gf_len * geo->ecc_strength +
+ geo->ecc_chunkn_size * 8) + 1;
+
+geo_setting:
+
+ geo->page_size = mtd->writesize + mtd->oobsize;
+ geo->payload_size = mtd->writesize;
+
+ /*
+ * The auxiliary buffer contains the metadata and the ECC status. The
+ * metadata is padded to the nearest 32-bit boundary. The ECC status
+ * contains one byte for every ECC chunk, and is also padded to the
+ * nearest 32-bit boundary.
+ */
+ geo->auxiliary_status_offset = ALIGN(geo->metadata_size, 4);
+ geo->auxiliary_size = ALIGN(geo->metadata_size, 4)
+ + ALIGN(geo->ecc_chunk_count, 4);
+
+ if (!this->swap_block_mark)
+ return 0;
+
+ /* calculate the number of ecc chunk behind the bbm */
+ i = (mtd->writesize / geo->ecc_chunkn_size) - bbm_chunk + 1;
+
+ block_mark_bit_offset = mtd->writesize * 8 -
+ (geo->ecc_strength * geo->gf_len * (geo->ecc_chunk_count - i)
+ + geo->metadata_size * 8);
+
+ geo->block_mark_byte_offset = block_mark_bit_offset / 8;
+ geo->block_mark_bit_offset = block_mark_bit_offset % 8;
+
+ dev_dbg(this->dev, "BCH Geometry :\n"
+ "GF length : %u\n"
+ "ECC Strength : %u\n"
+ "Page Size in Bytes : %u\n"
+ "Metadata Size in Bytes : %u\n"
+ "ECC Chunk0 Size in Bytes: %u\n"
+ "ECC Chunkn Size in Bytes: %u\n"
+ "ECC Chunk Count : %u\n"
+ "Payload Size in Bytes : %u\n"
+ "Auxiliary Size in Bytes: %u\n"
+ "Auxiliary Status Offset: %u\n"
+ "Block Mark Byte Offset : %u\n"
+ "Block Mark Bit Offset : %u\n"
+ "Block Mark in chunk : %u\n"
+ "Ecc for Meta data : %u\n",
+ geo->gf_len,
+ geo->ecc_strength,
+ geo->page_size,
+ geo->metadata_size,
+ geo->ecc_chunk0_size,
+ geo->ecc_chunkn_size,
+ geo->ecc_chunk_count,
+ geo->payload_size,
+ geo->auxiliary_size,
+ geo->auxiliary_status_offset,
+ geo->block_mark_byte_offset,
+ geo->block_mark_bit_offset,
+ bbm_chunk,
+ geo->ecc_for_meta);
+
+ return 0;
+}
+
static int legacy_set_geometry(struct gpmi_nand_data *this)
{
struct bch_geometry *geo = &this->bch_geometry;
geo->gf_len = 13;
/* The default for chunk size. */
- geo->ecc_chunk_size = 512;
- while (geo->ecc_chunk_size < mtd->oobsize) {
- geo->ecc_chunk_size *= 2; /* keep C >= O */
+ geo->ecc_chunk0_size = 512;
+ geo->ecc_chunkn_size = 512;
+ while (geo->ecc_chunkn_size < mtd->oobsize) {
+ geo->ecc_chunk0_size *= 2; /* keep C >= O */
+ geo->ecc_chunkn_size *= 2; /* keep C >= O */
geo->gf_len = 14;
}
- geo->ecc_chunk_count = mtd->writesize / geo->ecc_chunk_size;
+ geo->ecc_chunk_count = mtd->writesize / geo->ecc_chunkn_size;
/* We use the same ECC strength for all chunks. */
geo->ecc_strength = get_ecc_strength(this);
int common_nfc_set_geometry(struct gpmi_nand_data *this)
{
- if ((of_property_read_bool(this->dev->of_node, "fsl,use-minimum-ecc"))
- || legacy_set_geometry(this))
- /* To align with the kobs-ng, use the maximum ecc strength */
- /* controller can support, rather than the minimum ecc nand */
- /* spec required. */
- return set_geometry_by_ecc_info(this);
+ struct mtd_info *mtd = &this->nand.mtd;
+ struct nand_chip *chip = mtd->priv;
- return 0;
+ if (chip->ecc_strength_ds > this->devdata->bch_max_ecc_strength) {
+ dev_err(this->dev,
+ "unsupported NAND chip, minimum ecc required %d\n"
+ , chip->ecc_strength_ds);
+ return -EINVAL;
+ }
+
+ if (!(chip->ecc_strength_ds > 0 && chip->ecc_step_ds > 0) &&
+ !(mtd->oobsize > 1024))
+ return legacy_set_geometry(this);
+
+ if (mtd->oobsize > 1024 || chip->ecc_step_ds < mtd->oobsize)
+ return set_geometry_for_large_oob(this);
+
+ return set_geometry_by_ecc_info(this);
}
struct dma_chan *get_dma_chan(struct gpmi_nand_data *this)
/* Read ECC bytes into our internal raw_buffer */
offset = nfc_geo->metadata_size * 8;
- offset += ((8 * nfc_geo->ecc_chunk_size) + eccbits) * (i + 1);
+ offset += ((8 * nfc_geo->ecc_chunkn_size) + eccbits) * (i + 1);
offset -= eccbits;
bitoffset = offset % 8;
eccbytes = DIV_ROUND_UP(offset + eccbits, 8);
if (i == 0) {
/* The first block includes metadata */
flips = nand_check_erased_ecc_chunk(
- buf + i * nfc_geo->ecc_chunk_size,
- nfc_geo->ecc_chunk_size,
+ buf + i * nfc_geo->ecc_chunkn_size,
+ nfc_geo->ecc_chunkn_size,
eccbuf, eccbytes,
auxiliary_virt,
nfc_geo->metadata_size,
nfc_geo->ecc_strength);
} else {
flips = nand_check_erased_ecc_chunk(
- buf + i * nfc_geo->ecc_chunk_size,
- nfc_geo->ecc_chunk_size,
+ buf + i * nfc_geo->ecc_chunkn_size,
+ nfc_geo->ecc_chunkn_size,
eccbuf, eccbytes,
NULL, 0,
nfc_geo->ecc_strength);
}
}
+ /*
+ * if there is an ECC dedicate for meta:
+ * - need to add an extra ECC size when calculating col and page_size,
+ * if the meta size is NOT zero.
+ *
+ * - chunk0 size need to set to the same size as other chunks,
+ * if the meta size is zero.
+ */
+
meta = geo->metadata_size;
if (first) {
- col = meta + (size + ecc_parity_size) * first;
+ if (geo->ecc_for_meta)
+ col = meta + ecc_parity_size
+ + (size + ecc_parity_size) * first;
+ else
+ col = meta + (size + ecc_parity_size) * first;
+
chip->cmdfunc(mtd, NAND_CMD_RNDOUT, col, -1);
meta = 0;
/* change the BCH registers and bch_geometry{} */
n = last - first + 1;
- page_size = meta + (size + ecc_parity_size) * n;
+
+ if (geo->ecc_for_meta && meta)
+ page_size = meta + ecc_parity_size
+ + (size + ecc_parity_size) * n;
+ else
+ page_size = meta + (size + ecc_parity_size) * n;
r1_new &= ~(BM_BCH_FLASH0LAYOUT0_NBLOCKS |
BM_BCH_FLASH0LAYOUT0_META_SIZE);
- r1_new |= BF_BCH_FLASH0LAYOUT0_NBLOCKS(n - 1)
+ r1_new |= BF_BCH_FLASH0LAYOUT0_NBLOCKS(
+ (geo->ecc_for_meta && meta) ? n : n - 1)
| BF_BCH_FLASH0LAYOUT0_META_SIZE(meta);
+
+ /* set chunk0 size if meta size is 0 */
+ if (!meta) {
+ if (GPMI_IS_MX6(this) || GPMI_IS_MX7(this))
+ r1_new &= ~MX6Q_BM_BCH_FLASH0LAYOUT0_DATA0_SIZE;
+ else
+ r1_new &= ~BM_BCH_FLASH0LAYOUT0_DATA0_SIZE;
+ r1_new |= BF_BCH_FLASH0LAYOUT0_DATA0_SIZE(size, this);
+ }
writel(r1_new, bch_regs + HW_BCH_FLASH0LAYOUT0);
r2_new &= ~BM_BCH_FLASH0LAYOUT1_PAGE_SIZE;
r2_new |= BF_BCH_FLASH0LAYOUT1_PAGE_SIZE(page_size);
writel(r2_new, bch_regs + HW_BCH_FLASH0LAYOUT1);
- geo->ecc_chunk_count = n;
+ geo->ecc_chunk_count = (geo->ecc_for_meta && meta) ? n + 1 : n;
geo->payload_size = n * size;
geo->page_size = page_size;
+ geo->metadata_size = meta;
geo->auxiliary_status_offset = ALIGN(meta, 4);
dev_dbg(this->dev, "page:%d(%d:%d)%d, chunk:(%d:%d), BCH PG size:%d\n",
{
struct gpmi_nand_data *this = nand_get_controller_data(chip);
struct bch_geometry *nfc_geo = &this->bch_geometry;
- int eccsize = nfc_geo->ecc_chunk_size;
+ int eccsize = nfc_geo->ecc_chunkn_size;
int eccbits = nfc_geo->ecc_strength * nfc_geo->gf_len;
u8 *tmp_buf = this->raw_buffer;
size_t src_bit_off;
{
struct gpmi_nand_data *this = nand_get_controller_data(chip);
struct bch_geometry *nfc_geo = &this->bch_geometry;
- int eccsize = nfc_geo->ecc_chunk_size;
+ int eccsize = nfc_geo->ecc_chunkn_size;
int eccbits = nfc_geo->ecc_strength * nfc_geo->gf_len;
u8 *tmp_buf = this->raw_buffer;
uint8_t *oob = chip->oob_poi;
ecc->read_oob_raw = gpmi_ecc_read_oob_raw;
ecc->write_oob_raw = gpmi_ecc_write_oob_raw;
ecc->mode = NAND_ECC_HW;
- ecc->size = bch_geo->ecc_chunk_size;
+ ecc->size = bch_geo->ecc_chunkn_size;
ecc->strength = bch_geo->ecc_strength;
mtd_set_ooblayout(mtd, &gpmi_ooblayout_ops);
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