From: Igor Opaniuk igor.opaniuk@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.opaniuk@toradex.com Tested-by: Max Krummenacher max.krummenacher@toradex.com Reviewed-by: Oleksandr Suvorov oleksandr.suvorov@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: