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 33/47] mtd: nand: stm_nand_bch: search for and load flash-resident BBT
Date: Tue, 25 Mar 2014 08:19:50 +0000 [thread overview]
Message-ID: <1395735604-26706-34-git-send-email-lee.jones@linaro.org> (raw)
In-Reply-To: <1395735604-26706-1-git-send-email-lee.jones@linaro.org>
If a BBT already exists in flash, it's this function's task to locate
it and load it into the driver for local consumption.
Signed-off-by: Lee Jones <lee.jones@linaro.org>
---
drivers/mtd/nand/stm_nand_bch.c | 87 +++++++++++++++++++++++++++++++++++++++++
1 file changed, 87 insertions(+)
diff --git a/drivers/mtd/nand/stm_nand_bch.c b/drivers/mtd/nand/stm_nand_bch.c
index d7d97720..d1d84c1 100644
--- a/drivers/mtd/nand/stm_nand_bch.c
+++ b/drivers/mtd/nand/stm_nand_bch.c
@@ -973,6 +973,93 @@ static int bch_find_ibbt_sig(struct nandi_controller *nandi,
return 1;
}
+/* Search for and load Flash-resident BBT, updating Primary/Mirror if req'd */
+static int bch_load_bbt(struct nandi_controller *nandi,
+ struct nandi_bbt_info *bbt_info)
+{
+ unsigned int update = 0;
+ uint32_t block;
+ loff_t offs;
+ uint8_t vers;
+ char author[64];
+ int bak;
+
+ dev_dbg(nandi->dev, "looking for Flash-resident BBTs\n");
+
+ bbt_info->bbt_block[0] = 0;
+ bbt_info->bbt_block[1] = 0;
+ bbt_info->bbt_vers[0] = 0;
+ bbt_info->bbt_vers[1] = 0;
+
+ /* Look for IBBT signatures */
+ for (block = nandi->blocks_per_device - NAND_IBBT_NBLOCKS;
+ block < nandi->blocks_per_device;
+ block++) {
+ offs = (loff_t)block << nandi->block_shift;
+
+ if (bch_find_ibbt_sig(nandi, block, &bak, &vers, author)) {
+ dev_dbg(nandi->dev,
+ "found BBT [%s:%u] at 0x%012llx [%u] (%s)\n",
+ bbt_strs[bak], vers, offs, block,
+ author);
+
+ if (bbt_info->bbt_block[bak] == 0 ||
+ ((int8_t)(bbt_info->bbt_vers[bak] - vers)) < 0) {
+ bbt_info->bbt_block[bak] = block;
+ bbt_info->bbt_vers[bak] = vers;
+ }
+ }
+ }
+
+ /* What have we found? */
+ if (bbt_info->bbt_block[0] == 0 && bbt_info->bbt_block[1] == 0) {
+ /* no primary, no mirror: return error */
+ return 1;
+ } else if (bbt_info->bbt_block[0] == 0) {
+ /* no primary: use mirror, update primary */
+ bak = 1;
+ update = NAND_IBBT_UPDATE_PRIMARY;
+ bbt_info->bbt_block[0] = nandi->blocks_per_device - 1;
+ } else if (bbt_info->bbt_block[1] == 0) {
+ /* no mirror: use primary, update mirror */
+ bak = 0;
+ update = NAND_IBBT_UPDATE_MIRROR;
+ bbt_info->bbt_block[1] = nandi->blocks_per_device - 1;
+ } else if (bbt_info->bbt_vers[0] == bbt_info->bbt_vers[1]) {
+ /* primary == mirror: use primary, no update required */
+ bak = 0;
+ } else if ((int8_t)(bbt_info->bbt_vers[1] -
+ bbt_info->bbt_vers[0]) < 0) {
+ /* primary > mirror: use primary, update mirror */
+ bak = 0;
+ update = NAND_IBBT_UPDATE_MIRROR;
+ } else {
+ /* mirror > primary: use mirror, update primary */
+ bak = 1;
+ update = NAND_IBBT_UPDATE_PRIMARY;
+ }
+
+ vers = bbt_info->bbt_vers[bak];
+ block = bbt_info->bbt_block[bak];
+ offs = block << nandi->block_shift;
+ dev_info(nandi->dev, "using BBT [%s:%u] at 0x%012llx [%u]\n",
+ bbt_strs[bak], vers, offs, block);
+
+ /* Read BBT data */
+ if (bch_read_page(nandi, offs, bbt_info->bbt) < 0) {
+ dev_err(nandi->dev,
+ "error while reading BBT %s:%u] at 0x%012llx [%u]\n",
+ bbt_strs[bak], vers, offs, block);
+ return 1;
+ }
+
+ /* Update other BBT if required */
+ if (update)
+ bch_update_bbts(nandi, bbt_info, update, vers);
+
+ return 0;
+}
+
/*
* Initialisation
*/
--
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 ` [RFC 31/47] mtd: nand: stm_nand_bch: scan block for BBM(s) according to specified BBT options Lee Jones
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 ` Lee Jones [this message]
2014-03-25 8:19 ` [RFC 34/47] mtd: nand: stm_nand_bch: load flash-resident BBT 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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