From: Lee Jones <lee.jones@linaro.org>
To: linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org
Cc: angus.clark@st.com, kernel@stlinux.com, lee.jones@linaro.org,
linux-mtd@lists.infradead.org, pekon@ti.com,
computersforpeace@gmail.com, dwmw2@infradead.org
Subject: [RFC 31/47] mtd: nand: stm_nand_bch: scan block for BBM(s) according to specified BBT options
Date: Tue, 25 Mar 2014 08:19:48 +0000 [thread overview]
Message-ID: <1395735604-26706-32-git-send-email-lee.jones@linaro.org> (raw)
In-Reply-To: <1395735604-26706-1-git-send-email-lee.jones@linaro.org>
Search the specified (first and, second or last) page in a block for
the BBT. Support Hamming or Advanced Flex Mode (AFM) BBMs too.
Signed-off-by: Lee Jones <lee.jones@linaro.org>
---
drivers/mtd/nand/stm_nand_bch.c | 62 +++++++++++++++++++++++++++++++++++++++++
1 file changed, 62 insertions(+)
diff --git a/drivers/mtd/nand/stm_nand_bch.c b/drivers/mtd/nand/stm_nand_bch.c
index 4812431..29eeee8 100644
--- a/drivers/mtd/nand/stm_nand_bch.c
+++ b/drivers/mtd/nand/stm_nand_bch.c
@@ -643,6 +643,66 @@ static int bbt_is_block_bad(uint8_t *bbt, uint32_t block)
return bbt_get_block_mark(bbt, block) == BBT_MARK_GOOD ? 0 : 1;
}
+/* Scan page for BBM(s), according to specified BBT options */
+static int nandi_scan_bad_block_markers_page(struct nandi_controller *nandi,
+ uint32_t page)
+{
+ struct mtd_info *mtd = &nandi->info.mtd;
+ struct nand_chip *chip = mtd->priv;
+ uint8_t *oob_buf = nandi->oob_buf;
+ int i, e;
+
+ /* Read the OOB area */
+ flex_read_raw(nandi, page, mtd->writesize, oob_buf, mtd->oobsize);
+
+ if (oob_buf[chip->badblockpos] == 0xff)
+ return 0;
+
+ /* Tolerate 'alien' Hamming Boot Mode ECC */
+ e = 0;
+ for (i = 0; i < mtd->oobsize; i += 16)
+ e += hweight8(oob_buf[i + 3] ^ 'B');
+ if (e <= 1)
+ return 0;
+
+ /* Tolerate 'alien' Hamming AFM ECC */
+ e = 0;
+ for (i = 0; i < mtd->oobsize; i += 16) {
+ e += hweight8(oob_buf[i + 3] ^ 'A');
+ e += hweight8(oob_buf[i + 4] ^ 'F');
+ e += hweight8(oob_buf[i + 5] ^ 'M');
+ if (e <= 1)
+ return 0;
+ }
+
+ return 1;
+}
+
+/* Scan block for BBM(s), according to specified BBT options */
+static int nandi_scan_bad_block_markers_block(struct nandi_controller *nandi,
+ uint32_t block)
+
+{
+ struct mtd_info *mtd = &nandi->info.mtd;
+ struct nand_chip *chip = mtd->priv;
+ uint32_t pages_per_block = mtd->erasesize >> nandi->page_shift;
+ uint32_t page = block << (nandi->block_shift - nandi->page_shift);
+
+ if (nandi_scan_bad_block_markers_page(nandi, page))
+ return 1;
+
+ if ((chip->bbt_options & NAND_BBT_SCAN2NDPAGE) &&
+ nandi_scan_bad_block_markers_page(nandi, page + 1))
+ return 1;
+
+ if ((chip->bbt_options & NAND_BBT_SCANLASTPAGE) &&
+ nandi_scan_bad_block_markers_page(nandi,
+ page + pages_per_block - 1))
+ return 1;
+
+ return 0;
+}
+
/* Populate IBBT BCH Header */
static void bch_fill_ibbt_header(struct nandi_controller *nandi,
struct nand_ibbt_bch_header *ibbt_header,
@@ -957,6 +1017,8 @@ static void nandi_set_mtd_defaults(struct nandi_controller *nandi,
chip->priv = nandi;
chip->ecc.layout = &info->ecclayout;
+ chip->bbt_options |= NAND_BBT_USE_FLASH;
+
/* mtd_info */
mtd->owner = THIS_MODULE;
mtd->type = MTD_NANDFLASH;
--
1.8.3.2
next prev parent reply other threads:[~2014-03-25 8:21 UTC|newest]
Thread overview: 77+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-03-25 8:19 [RFC 00/47] mtd: nand: Add new driver supporting ST's BCH h/w Lee Jones
2014-03-25 8:19 ` [RFC 01/47] mtd: nand: export useful functions from core driver Lee Jones
2014-03-25 12:57 ` Ezequiel Garcia
2014-03-25 14:58 ` Lee Jones
2014-03-25 8:19 ` [RFC 02/47] mtd: nand: add ONFI NAND Timing Mode Specifications Lee Jones
2014-03-25 17:01 ` Jason Gunthorpe
2014-03-25 8:19 ` [RFC 03/47] mtd: nand: add shared register defines for ST's NAND Controller drivers Lee Jones
2014-03-25 8:19 ` [RFC 04/47] mtd: nand: adding ST's BCH NAND Controller driver Lee Jones
2014-03-25 8:19 ` [RFC 05/47] mtd: nand: stm_nand_bch: IRQ support for " Lee Jones
2014-03-26 7:10 ` Gupta, Pekon
2014-03-25 8:19 ` [RFC 06/47] mtd: nand: stm_nand_bch: change between BCH and Hamming modes Lee Jones
2014-03-25 8:19 ` [RFC 07/47] mtd: nand: stm_nand_bch: initialise the BCH Controller Lee Jones
2014-03-26 10:25 ` Gupta, Pekon
2014-04-30 10:22 ` Lee Jones
2014-04-30 10:59 ` Gupta, Pekon
2014-04-30 12:29 ` Lee Jones
2014-03-25 8:19 ` [RFC 08/47] mtd: nand: stm_nand_bch: supply clock support Lee Jones
2014-03-26 7:15 ` Gupta, Pekon
2014-03-25 8:19 ` [RFC 09/47] mtd: nand: stm_nand_bch: introduce and initialise some important data structures Lee Jones
2014-03-25 8:19 ` [RFC 10/47] mtd: nand: stm_nand_bch: initialise the Hamming Controller Lee Jones
2014-03-25 8:19 ` [RFC 11/47] mtd: nand: stm_nand_bch: add Power Management Lee Jones
2014-03-25 8:19 ` [RFC 12/47] mtd: nand: stm_nand_bch: scan for NAND devices Lee Jones
2014-03-25 8:19 ` [RFC 13/47] mtd: nand: stm_nand_bch: provide Device Tree support Lee Jones
2014-03-26 9:18 ` Gupta, Pekon
2014-04-30 12:54 ` Lee Jones
2014-05-05 6:55 ` Gupta, Pekon
2014-05-09 10:03 ` Lee Jones
2014-05-09 10:32 ` Gupta, Pekon
2014-05-09 10:38 ` Lee Jones
2014-05-19 14:02 ` Lee Jones
2014-03-25 8:19 ` [RFC 14/47] mtd: nand: stm_nand_bch: configure BCH and FLEX by ONFI timing mode Lee Jones
2014-03-25 8:19 ` [RFC 15/47] mtd: nand: stm_nand_bch: add compatible page size check Lee Jones
2014-03-25 8:19 ` [RFC 16/47] mtd: nand: stm_nand_bch: derive some working variables for latter use Lee Jones
2014-03-25 8:19 ` [RFC 17/47] mtd: nand: stm_nand_bch: automatically set EEC mode if requested Lee Jones
2014-03-25 8:19 ` [RFC 18/47] mtd: nand: stm_nand_bch: ensure configuration is compatible with this driver Lee Jones
2014-03-25 8:19 ` [RFC 19/47] mtd: nand: stm_nand_bch: configure BCH read/write/erase programs Lee Jones
2014-03-25 8:19 ` [RFC 20/47] mtd: nand: stm_nand_bch: initialise working buffers Lee Jones
2014-03-25 8:19 ` [RFC 21/47] mtd: nand: stm_nand_bch: provide shared BCH operations Lee Jones
2014-03-25 8:19 ` [RFC 22/47] mtd: nand: stm_nand_bch: check erased page for zeros Lee Jones
2014-03-25 8:19 ` [RFC 23/47] mtd: nand: stm_nand_bch: read and write page (BCH) Lee Jones
2014-03-26 10:17 ` Gupta, Pekon
2014-04-30 11:19 ` Lee Jones
2014-03-25 8:19 ` [RFC 24/47] mtd: nand: stm_nand_bch: find IBBT signature Lee Jones
2014-03-25 8:19 ` [RFC 25/47] mtd: nand: stm_nand_bch: bad block marking helpers Lee Jones
2014-03-25 8:19 ` [RFC 26/47] mtd: nand: stm_nand_bch: populate IBBT BCH Header Lee Jones
2014-03-25 8:19 ` [RFC 27/47] mtd: nand: stm_nand_bch: write IBBT to Flash Lee Jones
2014-03-25 8:19 ` [RFC 28/47] mtd: nand: stm_nand_bch: update flash-resident BBT(s) Lee Jones
2014-03-25 8:19 ` [RFC 29/47] mtd: nand: stm_nand_bch: add Hamming-FLEX operations Lee Jones
2014-03-25 8:19 ` [RFC 30/47] mtd: nand: stm_nand_bch: read and write raw (FLEX) Lee Jones
2014-03-25 8:19 ` Lee Jones [this message]
2014-03-25 8:19 ` [RFC 32/47] mtd: nand: stm_nand_bch: scan for BBMs and build memory-resident BBT Lee Jones
2014-03-25 8:19 ` [RFC 33/47] mtd: nand: stm_nand_bch: search for and load flash-resident BBT Lee Jones
2014-03-25 8:19 ` [RFC 34/47] mtd: nand: stm_nand_bch: " Lee Jones
2014-03-25 8:19 ` [RFC 35/47] mtd: nand: stm_nand_bch: dump bad blocks Lee Jones
2014-03-25 12:53 ` Ezequiel Garcia
2014-03-25 8:19 ` [RFC 36/47] mtd: nand: stm_nand_bch: parse partitions and register an MTD device Lee Jones
2014-03-25 8:19 ` [RFC 37/47] mtd: nand: stm_nand_bch: fetch the bit-flips threshold Lee Jones
2014-03-25 8:19 ` [RFC 38/47] mtd: nand: stm_nand_bch: check WP (FLEX) Lee Jones
2014-03-25 8:19 ` [RFC 39/47] mtd: nand: stm_nand_bch: read and write ops (FLEX) Lee Jones
2014-03-25 8:19 ` [RFC 40/47] mtd: nand: stm_nand_bch: MTD erase (BCH) Lee Jones
2014-03-25 8:19 ` [RFC 41/47] mtd: nand: stm_nand_bch: MTD mark and check for bad blocks (BCH) Lee Jones
2014-03-25 8:19 ` [RFC 42/47] mtd: nand: stm_nand_bch: add read and write OOB (BCH) Lee Jones
2014-03-25 8:20 ` [RFC 43/47] mtd: nand: stm_nand_bch: read and write functions (BCH) Lee Jones
2014-03-26 10:31 ` Gupta, Pekon
2014-04-30 9:19 ` Lee Jones
2014-03-25 8:20 ` [RFC 44/47] mtd: nand: stm_nand_bch: MTD read and write (BCH) Lee Jones
2014-03-25 8:20 ` [RFC 45/47] mtd: nand: stm_nand_bch: read and write buffers (FLEX) Lee Jones
2014-03-25 8:20 ` [RFC 46/47] mtd: nand: mtd_nand_bch: add remaining FLEX functions Lee Jones
2014-03-25 8:20 ` [RFC 47/47] mtd: nand: stm_nand_bch: catch unsupported calls Lee Jones
2014-03-25 12:50 ` [RFC 00/47] mtd: nand: Add new driver supporting ST's BCH h/w Ezequiel Garcia
2014-03-25 13:11 ` Lee Jones
2014-03-25 22:00 ` Ezequiel Garcia
2014-03-26 7:28 ` Brian Norris
2014-03-27 10:28 ` Lee Jones
2014-04-01 11:29 ` Lee Jones
2014-04-10 20:00 ` Brian Norris
2014-04-30 9:57 ` Lee Jones
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