mirror of
https://github.com/openwrt/openwrt.git
synced 2024-12-27 17:18:59 +00:00
54 lines
2.0 KiB
Diff
54 lines
2.0 KiB
Diff
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
|
|
@@ -645,6 +645,17 @@ 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;
|
|
@@ -1997,6 +2008,9 @@ 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;
|
|
|