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Koen Vandeputte 74738c4b80 imx6: fix DMA transaction errors Following errors were seen in the past on imx6 when using serial: [ 22.617622] imx-uart 2020000.serial: DMA transaction error. [ 22.623228] imx-uart 2020000.serial: DMA transaction error. [ 22.628826] imx-uart 2020000.serial: DMA transaction error. [ 22.648951] imx-uart 2020000.serial: DMA transaction error. [ 22.654558] imx-uart 2020000.serial: DMA transaction error. [ 22.660156] imx-uart 2020000.serial: DMA transaction error. Which is the reason why DMA for the serial ports got disabled in commits: `efb362cd93` ("imx6: disable dma on uart") `3b4241071d` ("imx6: disable UART dma") As indicated on mailinglist discussion, the cause seems to be the usage of very old SDMA firmware which is present in the soc: [ 0.624302] imx-sdma 20ec000.sdma: Direct firmware load for imx/sdma/sdma-imx6q.bin failed with error -2 [ 0.624318] imx-sdma 20ec000.sdma: Falling back to user helper [ 64.531607] imx-sdma 20ec000.sdma: external firmware not found, using ROM firmware This patch adds the new firmware binary. (2196 bytes) It is required to embed the binary into the kernel image, as it gets loaded very early in the boot process where the rootfs is not available yet: [ 0.622966] imx-sdma 20ec000.sdma: loaded firmware 3.3 Extended testing shows that the DMA errors are not seen anymore when using this newer firmware version. Signed-off-by: Koen Vandeputte <koen.vandeputte@ncentric.com>		2018-11-06 11:49:27 +01:00
.github	build: Update README & github help	2018-07-08 09:41:53 +01:00
config	sunxi: fix build without ext4 rootfs	2018-09-29 17:23:11 +02:00
include	kernel: bump 4.14 to 4.14.79	2018-11-05 16:00:00 +01:00
package	ath9k: fix dynack in IBSS mode	2018-11-06 11:49:27 +01:00
scripts	scripts: update config.guess and config.sub	2018-11-01 17:16:52 +01:00
target	imx6: fix DMA transaction errors	2018-11-06 11:49:27 +01:00
toolchain	glibc: update to latest 2.27 commit (BZ#23709,BZ#23822)	2018-11-05 14:22:17 +01:00
tools	tools/bison: update to version 3.2	2018-11-05 14:04:26 +01:00
.gitattributes
.gitignore	.gitignore: add .project & .cproject for eclipse users	2018-01-17 11:07:17 +01:00
BSDmakefile
Config.in
feeds.conf.default	feeds: switch git.lede-project.org URLs to git.openwrt.org	2018-01-16 16:59:22 +01:00
LICENSE
Makefile	build: Unset CDPATH to avoid problems	2018-08-25 11:10:28 +02:00
README	build: README punctuation pendantry	2018-07-08 12:05:16 +01:00
rules.mk	rules.mk: add ESED command	2018-09-24 15:57:27 +01:00

README

  _______                     ________        __
 |       |.-----.-----.-----.|  |  |  |.----.|  |_
 |   -   ||  _  |  -__|     ||  |  |  ||   _||   _|
 |_______||   __|_____|__|__||________||__|  |____|
          |__| W I R E L E S S   F R E E D O M
 -----------------------------------------------------

This is the buildsystem for the OpenWrt Linux distribution.

To build your own firmware you need a Linux, BSD or MacOSX system (case
sensitive filesystem required). Cygwin is unsupported because of the lack
of a case sensitive file system.

You need gcc, binutils, bzip2, flex, python, perl, make, find, grep, diff,
unzip, gawk, getopt, subversion, libz-dev and libc headers installed.

1. Run "./scripts/feeds update -a" to obtain all the latest package definitions
defined in feeds.conf / feeds.conf.default

2. Run "./scripts/feeds install -a" to install symlinks for all obtained
packages into package/feeds/

3. Run "make menuconfig" to select your preferred configuration for the
toolchain, target system & firmware packages.

4. Run "make" to build your firmware. This will download all sources, build
the cross-compile toolchain and then cross-compile the Linux kernel & all
chosen applications for your target system.

Sunshine!
	Your OpenWrt Community
	http://www.openwrt.org