5e49c57956
1)Changes - Rebased the patches for linux-4.4.7 - Added patch to fix spi nor fifo and dma support - Added patch to configure watchdog barktime 2)Testing Tested on IPQ AP148 Board: a. NOR boot and NAND boot b. ethernet network and ath10k wifi c. ubi sysupgrade UnTested dwc3 usb has not been validated on IPQ board(AP148) 3)Known Issues: Once we flash ubi image on AP148, and if we reset the board, uboot on first boot creates PEB and LEB for dynamic sized partitions, which is incorrect and not what linux expects which causes errors when trying to mount rootfs. In order to test this, we can use the below steps: a. Flash the ubi image on board and don't reset the board b. load the kernel fit image in RAM and boot from there. Signed-off-by: Ram Chandra Jangir <rjangi@codeaurora.org>
83 lines
2.7 KiB
Diff
83 lines
2.7 KiB
Diff
Content-Type: text/plain; charset="utf-8"
|
|
MIME-Version: 1.0
|
|
Content-Transfer-Encoding: 7bit
|
|
Subject: [v3,
|
|
1/5] mtd: nand: Create a BBT flag to access bad block markers in raw
|
|
mode
|
|
From: Archit Taneja <architt@codeaurora.org>
|
|
X-Patchwork-Id: 6927081
|
|
Message-Id: <1438578498-32254-2-git-send-email-architt@codeaurora.org>
|
|
To: linux-mtd@lists.infradead.org, dehrenberg@google.com,
|
|
cernekee@gmail.com, computersforpeace@gmail.com
|
|
Cc: linux-arm-msm@vger.kernel.org, agross@codeaurora.org,
|
|
sboyd@codeaurora.org, linux-kernel@vger.kernel.org,
|
|
Archit Taneja <architt@codeaurora.org>
|
|
Date: Mon, 3 Aug 2015 10:38:14 +0530
|
|
|
|
Some controllers can access the factory bad block marker from OOB only
|
|
when they read it in raw mode. When ECC is enabled, these controllers
|
|
discard reading/writing bad block markers, preventing access to them
|
|
altogether.
|
|
|
|
The bbt driver assumes MTD_OPS_PLACE_OOB when scanning for bad blocks.
|
|
This results in the nand driver's ecc->read_oob() op to be called, which
|
|
works with ECC enabled.
|
|
|
|
Create a new BBT option flag that tells nand_bbt to force the mode to
|
|
MTD_OPS_RAW. This would result in the correct op being called for the
|
|
underlying nand controller driver.
|
|
|
|
Reviewed-by: Andy Gross <agross@codeaurora.org>
|
|
Signed-off-by: Archit Taneja <architt@codeaurora.org>
|
|
|
|
---
|
|
drivers/mtd/nand/nand_base.c | 6 +++++-
|
|
drivers/mtd/nand/nand_bbt.c | 6 +++++-
|
|
include/linux/mtd/bbm.h | 7 +++++++
|
|
3 files changed, 17 insertions(+), 2 deletions(-)
|
|
|
|
--- a/drivers/mtd/nand/nand_base.c
|
|
+++ b/drivers/mtd/nand/nand_base.c
|
|
@@ -394,7 +394,11 @@
|
|
} else {
|
|
ops.len = ops.ooblen = 1;
|
|
}
|
|
- ops.mode = MTD_OPS_PLACE_OOB;
|
|
+
|
|
+ if (unlikely(chip->bbt_options & NAND_BBT_ACCESS_BBM_RAW))
|
|
+ ops.mode = MTD_OPS_RAW;
|
|
+ else
|
|
+ ops.mode = MTD_OPS_PLACE_OOB;
|
|
|
|
/* Write to first/last page(s) if necessary */
|
|
if (chip->bbt_options & NAND_BBT_SCANLASTPAGE)
|
|
--- a/drivers/mtd/nand/nand_bbt.c
|
|
+++ b/drivers/mtd/nand/nand_bbt.c
|
|
@@ -420,7 +420,11 @@
|
|
ops.oobbuf = buf;
|
|
ops.ooboffs = 0;
|
|
ops.datbuf = NULL;
|
|
- ops.mode = MTD_OPS_PLACE_OOB;
|
|
+
|
|
+ if (unlikely(bd->options & NAND_BBT_ACCESS_BBM_RAW))
|
|
+ ops.mode = MTD_OPS_RAW;
|
|
+ else
|
|
+ ops.mode = MTD_OPS_PLACE_OOB;
|
|
|
|
for (j = 0; j < numpages; j++) {
|
|
/*
|
|
--- a/include/linux/mtd/bbm.h
|
|
+++ b/include/linux/mtd/bbm.h
|
|
@@ -116,6 +116,12 @@
|
|
#define NAND_BBT_NO_OOB_BBM 0x00080000
|
|
|
|
/*
|
|
+ * Force MTD_OPS_RAW mode when trying to access bad block markes from OOB. To
|
|
+ * be used by controllers which can access BBM only when ECC is disabled, i.e,
|
|
+ * when in RAW access mode
|
|
+ */
|
|
+#define NAND_BBT_ACCESS_BBM_RAW 0x00100000
|
|
+/*
|
|
* Flag set by nand_create_default_bbt_descr(), marking that the nand_bbt_descr
|
|
* was allocated dynamicaly and must be freed in nand_release(). Has no meaning
|
|
* in nand_chip.bbt_options.
|