From: Igor Opaniuk <igor.opan...@toradex.com>
Add support for updating FCB/DBBT on i.MX7:
- additional new fields in FCB structure
- Leverage hardware BCH/randomizer for writing FCB
Signed-off-by: Igor Opaniuk <igor.opan...@toradex.com>
Tested-by: Max Krummenacher <max.krummenac...@toradex.com>
Reviewed-by: Oleksandr Suvorov <oleksandr.suvo...@toradex.com>
---
arch/arm/include/asm/mach-imx/imx-nandbcb.h | 12 ++
arch/arm/mach-imx/Kconfig | 2 +-
arch/arm/mach-imx/cmd_nandbcb.c | 137 +++++++++++++-------
3 files changed, 104 insertions(+), 47 deletions(-)
diff --git a/arch/arm/include/asm/mach-imx/imx-nandbcb.h
b/arch/arm/include/asm/mach-imx/imx-nandbcb.h
index 033659a038..907e7ed8f9 100644
--- a/arch/arm/include/asm/mach-imx/imx-nandbcb.h
+++ b/arch/arm/include/asm/mach-imx/imx-nandbcb.h
@@ -106,6 +106,18 @@ struct fcb_block {
/* The swap position of main area in spare area */
u32 spare_offset;
+
+ /* Actual for iMX7 only */
+ u32 onfi_sync_enable;
+ u32 onfi_sync_speed;
+ u32 onfi_sync_nand_data;
+ u32 reserved2[6];
+ u32 disbbm_search;
+ u32 disbbm_search_limit;
+ u32 reserved3[15];
+ u32 read_retry_enable;
+ u32 reserved4[1];
+ u32 fill_to_1024[183];
};
#endif /* _IMX_NAND_BCB_H_ */
diff --git a/arch/arm/mach-imx/Kconfig b/arch/arm/mach-imx/Kconfig
index 4a2f39b110..3f93fe5174 100644
--- a/arch/arm/mach-imx/Kconfig
+++ b/arch/arm/mach-imx/Kconfig
@@ -82,7 +82,7 @@ config CMD_NANDBCB
bool "i.MX6 NAND Boot Control Block(BCB) command"
depends on NAND && CMD_MTDPARTS
select BCH if MX6UL || MX6ULL
- default y if ARCH_MX6 && NAND_MXS
+ default y if (ARCH_MX6 && NAND_MXS) || (ARCH_MX7 && NAND_MXS)
help
Unlike normal 'nand write/erase' commands, this command update
Boot Control Block(BCB) for i.MX6 platform NAND IP's.
diff --git a/arch/arm/mach-imx/cmd_nandbcb.c b/arch/arm/mach-imx/cmd_nandbcb.c
index 1a2e017aaf..a3a44bc284 100644
--- a/arch/arm/mach-imx/cmd_nandbcb.c
+++ b/arch/arm/mach-imx/cmd_nandbcb.c
@@ -17,6 +17,7 @@
#include <linux/bch.h>
#include <linux/mtd/mtd.h>
+#include <asm/arch/sys_proto.h>
#include <asm/mach-imx/imx-nandbcb.h>
#include <asm/mach-imx/imximage.cfg>
#include <mxs_nand.h>
@@ -131,26 +132,36 @@ static void fill_fcb(struct fcb_block *fcb, struct
mtd_info *mtd)
{
struct nand_chip *chip = mtd_to_nand(mtd);
struct mxs_nand_info *nand_info = nand_get_controller_data(chip);
+ struct mxs_nand_layout l;
+
+ mxs_nand_get_layout(mtd, &l);
fcb->fingerprint = FCB_FINGERPRINT;
fcb->version = FCB_VERSION_1;
+
fcb->pagesize = mtd->writesize;
fcb->oob_pagesize = mtd->writesize + mtd->oobsize;
fcb->sectors = mtd->erasesize / mtd->writesize;
- /* Divide ECC strength by two and save the value into FCB structure. */
- fcb->ecc_level = nand_info->bch_geometry.ecc_strength >> 1;
-
- fcb->ecc_type = fcb->ecc_level;
+ fcb->meta_size = l.meta_size;
+ fcb->nr_blocks = l.nblocks;
+ fcb->ecc_nr = l.data0_size;
+ fcb->ecc_level = l.ecc0;
+ fcb->ecc_size = l.datan_size;
+ fcb->ecc_type = l.eccn;
/* Also hardcoded in kobs-ng */
- fcb->ecc_nr = 0x00000200;
- fcb->ecc_size = 0x00000200;
- fcb->datasetup = 80;
- fcb->datahold = 60;
- fcb->addr_setup = 25;
- fcb->dsample_time = 6;
- fcb->meta_size = 10;
+ if (is_mx6()) {
+ fcb->datasetup = 80;
+ fcb->datahold = 60;
+ fcb->addr_setup = 25;
+ fcb->dsample_time = 6;
+ } else if (is_mx7()) {
+ fcb->datasetup = 10;
+ fcb->datahold = 7;
+ fcb->addr_setup = 15;
+ fcb->dsample_time = 6;
+ }
/* DBBT search area starts at second page on first block */
fcb->dbbt_start = 1;
@@ -162,6 +173,9 @@ static void fill_fcb(struct fcb_block *fcb, struct mtd_info
*mtd)
fcb->nr_blocks = mtd->writesize / fcb->ecc_nr - 1;
+ fcb->disbbm = 0;
+ fcb->disbbm_search = 0;
+
fcb->checksum = calc_chksum((void *)fcb + 4, sizeof(*fcb) - 4);
}
@@ -197,6 +211,7 @@ static int nandbcb_update(struct mtd_info *mtd, loff_t off,
size_t size,
size_t fwsize, dummy;
int i, ret;
+ fcb_raw_page = 0;
/* erase */
memset(&opts, 0, sizeof(opts));
opts.offset = off;
@@ -287,50 +302,79 @@ static int nandbcb_update(struct mtd_info *mtd, loff_t
off, size_t size,
else if (ret > 0)
dbbt->dbbtpages = 1;
- /* write fcb/dbbt */
- fcb_raw_page = kzalloc(mtd->writesize + mtd->oobsize, GFP_KERNEL);
- if (!fcb_raw_page) {
- debug("failed to allocate fcb_raw_page\n");
- ret = -ENOMEM;
- goto dbbt_data_page_err;
- }
+ /*
+ * We prepare raw page only for i.MX6, for i.MX7 we
+ * leverage BCH hw module instead
+ */
+ if (is_mx6()) {
+ /* write fcb/dbbt */
+ fcb_raw_page = kzalloc(mtd->writesize + mtd->oobsize,
+ GFP_KERNEL);
+ if (!fcb_raw_page) {
+ debug("failed to allocate fcb_raw_page\n");
+ ret = -ENOMEM;
+ goto dbbt_data_page_err;
+ }
#if defined(CONFIG_MX6UL) || defined(CONFIG_MX6ULL)
- /* 40 bit BCH, for i.MX6UL(L) */
- encode_bch_ecc(fcb_raw_page + 32, fcb, 40);
+ /* 40 bit BCH, for i.MX6UL(L) */
+ encode_bch_ecc(fcb_raw_page + 32, fcb, 40);
#else
- memcpy(fcb_raw_page + 12, fcb, sizeof(struct fcb_block));
- encode_hamming_13_8(fcb_raw_page + 12, fcb_raw_page + 12 + 512, 512);
+ memcpy(fcb_raw_page + 12, fcb, sizeof(struct fcb_block));
+ encode_hamming_13_8(fcb_raw_page + 12,
+ fcb_raw_page + 12 + 512, 512);
#endif
- /*
- * Set the first and second byte of OOB data to 0xFF, not 0x00. These
- * bytes are used as the Manufacturers Bad Block Marker (MBBM). Since
- * the FCB is mostly written to the first page in a block, a scan for
- * factory bad blocks will detect these blocks as bad, e.g. when
- * function nand_scan_bbt() is executed to build a new bad block table.
- */
- memset(fcb_raw_page + mtd->writesize, 0xFF, 2);
-
+ /*
+ * Set the first and second byte of OOB data to 0xFF,
+ * not 0x00. These bytes are used as the Manufacturers Bad
+ * Block Marker (MBBM). Since the FCB is mostly written to
+ * the first page in a block, a scan for
+ * factory bad blocks will detect these blocks as bad, e.g.
+ * when function nand_scan_bbt() is executed to build a new
+ * bad block table.
+ */
+ memset(fcb_raw_page + mtd->writesize, 0xFF, 2);
+ }
for (i = 0; i < nr_blks_fcb; i++) {
if (mtd_block_isbad(mtd, off)) {
printf("Block %d is bad, skipped\n", i);
continue;
}
- /* raw write */
- mtd_oob_ops_t ops = {
- .datbuf = (u8 *)fcb_raw_page,
- .oobbuf = ((u8 *)fcb_raw_page) + mtd->writesize,
- .len = mtd->writesize,
- .ooblen = mtd->oobsize,
- .mode = MTD_OPS_RAW
- };
-
- ret = mtd_write_oob(mtd, mtd->erasesize * i, &ops);
- if (ret)
- goto fcb_raw_page_err;
- debug("NAND fcb write: 0x%x offset, 0x%x bytes written: %s\n",
- mtd->erasesize * i, ops.len, ret ? "ERROR" : "OK");
+ /*
+ * User BCH ECC hardware module for i.MX7
+ */
+ if (is_mx7()) {
+ u32 off = i * mtd->erasesize;
+ size_t rwsize = sizeof(*fcb);
+
+ printf("Writing %d bytes to 0x%x: ", rwsize, off);
+
+ /* switch nand BCH to FCB compatible settings */
+ mxs_nand_mode_fcb(mtd);
+ ret = nand_write(mtd, off, &rwsize,
+ (unsigned char *)fcb);
+ mxs_nand_mode_normal(mtd);
+
+ printf("%s\n", ret ? "ERROR" : "OK");
+ } else if (is_mx6()) {
+ /* raw write */
+ mtd_oob_ops_t ops = {
+ .datbuf = (u8 *)fcb_raw_page,
+ .oobbuf = ((u8 *)fcb_raw_page) +
+ mtd->writesize,
+ .len = mtd->writesize,
+ .ooblen = mtd->oobsize,
+ .mode = MTD_OPS_RAW
+ };
+
+ ret = mtd_write_oob(mtd, mtd->erasesize * i, &ops);
+ if (ret)
+ goto fcb_raw_page_err;
+ debug("NAND fcb write: 0x%x offset 0x%x written: %s\n",
+ mtd->erasesize * i, ops.len, ret ?
+ "ERROR" : "OK");
+ }
ret = mtd_write(mtd, mtd->erasesize * i + mtd->writesize,
mtd->writesize, &dummy, dbbt_page);
@@ -352,7 +396,8 @@ static int nandbcb_update(struct mtd_info *mtd, loff_t off,
size_t size,
}
fcb_raw_page_err:
- kfree(fcb_raw_page);
+ if (is_mx6())
+ kfree(fcb_raw_page);
dbbt_data_page_err:
kfree(dbbt_data_page);
dbbt_page_err:
--
2.17.1
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