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| author | Rafał Miłecki <zajec5@gmail.com> | 2016-02-01 12:42:23 +0000 |
|---|---|---|
| committer | Rafał Miłecki <zajec5@gmail.com> | 2016-02-01 12:42:23 +0000 |
| commit | 701dba093fd0f6f1e3308159aaa8c4d03be800b3 (patch) | |
| tree | 89a6b3a5baa7709f5eeee4a51a38a3a795ddee32 /target/linux | |
| parent | 78abece62fc30a01d2402c06ef2d7c3c39d727de (diff) | |
| download | mtk-20170518-701dba093fd0f6f1e3308159aaa8c4d03be800b3.zip mtk-20170518-701dba093fd0f6f1e3308159aaa8c4d03be800b3.tar.gz mtk-20170518-701dba093fd0f6f1e3308159aaa8c4d03be800b3.tar.bz2 | |
bcm53xx: add brcmnand patch reading flash parameters
It's useful for adding support for new hardware.
Signed-off-by: Rafał Miłecki <zajec5@gmail.com>
SVN-Revision: 48603
Diffstat (limited to 'target/linux')
| -rw-r--r-- | target/linux/bcm53xx/patches-4.4/140-mtd-brcmnand-set-initial-ECC-params-based-on-info-fr.patch | 53 |
1 files changed, 53 insertions, 0 deletions
diff --git a/target/linux/bcm53xx/patches-4.4/140-mtd-brcmnand-set-initial-ECC-params-based-on-info-fr.patch b/target/linux/bcm53xx/patches-4.4/140-mtd-brcmnand-set-initial-ECC-params-based-on-info-fr.patch new file mode 100644 index 0000000..0a3620f --- /dev/null +++ b/target/linux/bcm53xx/patches-4.4/140-mtd-brcmnand-set-initial-ECC-params-based-on-info-fr.patch @@ -0,0 +1,53 @@ +From eff78bc2c385f592294278582f38ad5fa4ed2b34 Mon Sep 17 00:00:00 2001 +From: =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= <zajec5@gmail.com> +Date: Wed, 27 Jan 2016 08:47:03 +0100 +Subject: [PATCH] mtd: brcmnand: set initial ECC params based on info from HW +MIME-Version: 1.0 +Content-Type: text/plain; charset=UTF-8 +Content-Transfer-Encoding: 8bit + +So far we were depending on nand_dt_init getting ECC info from DT and +setting it in ECC struct. It is possible to simply read this info from +hardware registers which makes adding support for new hardware way +easier (no more guessing & trying all combinations). +Please note it still gives a precedence to DT which was overwrite +whatever was initially set by the driver. + +Signed-off-by: Rafał Miłecki <zajec5@gmail.com> +--- +It took me hours to figure out how to setup NAND on my D-Link DIR-885L. +This should be very helpful for ppl adding new devices support. +--- + drivers/mtd/nand/brcmnand/brcmnand.c | 14 ++++++++++++++ + 1 file changed, 14 insertions(+) + +--- a/drivers/mtd/nand/brcmnand/brcmnand.c ++++ b/drivers/mtd/nand/brcmnand/brcmnand.c +@@ -613,6 +613,17 @@ static inline u32 brcmnand_ecc_level_mas + return mask << NAND_ACC_CONTROL_ECC_SHIFT; + } + ++static int brcmnand_get_ecc_strength(struct brcmnand_host *host) ++{ ++ struct brcmnand_controller *ctrl = host->ctrl; ++ u32 mask = brcmnand_ecc_level_mask(ctrl); ++ u16 acc_control_offs = brcmnand_cs_offset(ctrl, host->cs, ++ BRCMNAND_CS_ACC_CONTROL); ++ ++ return (nand_readreg(ctrl, acc_control_offs) & mask) >> ++ NAND_ACC_CONTROL_ECC_SHIFT; ++} ++ + static void brcmnand_set_ecc_enabled(struct brcmnand_host *host, int en) + { + struct brcmnand_controller *ctrl = host->ctrl; +@@ -1965,6 +1976,9 @@ static int brcmnand_init_cs(struct brcmn + nand_writereg(ctrl, cfg_offs, + nand_readreg(ctrl, cfg_offs) & ~CFG_BUS_WIDTH); + ++ chip->ecc.strength = brcmnand_get_ecc_strength(host); ++ chip->ecc.size = brcmnand_get_sector_size_1k(host) ? 1024 : 512; ++ + if (nand_scan_ident(mtd, 1, NULL)) + return -ENXIO; + |