Disable DMA in the MUSB driver

brick/scripts/README.md

@@ -8,3 +8,7 @@ Additionally, the `edimax01.ko` is replaced by now much more popular `rtl8192cu.
 
 The init script has a hook for running a shell script from `/mnt/ramdisk/`. This can be used
 for testing different modules etc.
+
+The kernel command line has been modified to:
+* disable DMA for the MUSB driver - otherwise the mass storage device is very unstable
+* increase the size of dmesg buffer to 128k

brick/scripts/ev3-fs.patch

@@ -1,7 +1,15 @@
 diff -ur orig-ev3/etc/init.d/ev3init.sh dev-ev3/etc/init.d/ev3init.sh
 --- orig-ev3/etc/init.d/ev3init.sh	1970-01-01 01:00:00.000000000 +0100
-+++ dev-ev3/etc/init.d/ev3init.sh	2017-07-25 15:55:03.642866971 +0100
++++ dev-ev3/etc/init.d/ev3init.sh	2017-07-27 12:19:43.195041798 +0100
-@@ -60,3 +60,6 @@
+@@ -1,5 +1,7 @@
+ #!/bin/sh
+ 
++echo Y > /sys/module/printk/parameters/time
++
+ bluetoothd -n > /dev/null 2>&1 &
+ 
+ echo "Setting up VirtualDrive...";
+@@ -60,3 +62,6 @@
  sleep 2
  hciattach /dev/ttyS2 texas 2000000 "flow" "nosleep" $STRING
  sdptool add SP
@@ -11,7 +19,7 @@ diff -ur orig-ev3/etc/init.d/ev3init.sh dev-ev3/etc/init.d/ev3init.sh
 Only in orig-ev3/home/root/lms2012/sys: exit~
 diff -ur orig-ev3/home/root/lms2012/sys/init dev-ev3/home/root/lms2012/sys/init
 --- orig-ev3/home/root/lms2012/sys/init	1970-01-01 01:00:00.000000000 +0100
-+++ dev-ev3/home/root/lms2012/sys/init	2017-07-26 18:36:03.814459337 +0100
++++ dev-ev3/home/root/lms2012/sys/init	2017-07-27 12:23:43.072605126 +0100
 @@ -5,13 +5,15 @@
  var=$(printf 'HostStr=%s SerialStr=%s' $(cat /home/root/lms2012/sys/settings/BrickName) $(cat /home/root/lms2012/sys/settings/BTser))
  echo $var > /home/root/lms2012/sys/settings/UsbInfo.dat
@@ -29,6 +37,15 @@ diff -ur orig-ev3/home/root/lms2012/sys/init dev-ev3/home/root/lms2012/sys/init
  insmod ${PWD}/mod/d_usbhost.ko
  insmod ${PWD}/mod/d_sound.ko `cat /home/root/lms2012/sys/settings/HwId`
  insmod ${PWD}/mod/d_bt.ko `cat /home/root/lms2012/sys/settings/HwId`
+@@ -29,6 +31,8 @@
+ chmod 666 /dev/lms_iic
+ chmod 666 /dev/lms_bt
+ 
++echo 4 > /proc/sys/kernel/printk
++ 
+ cd ..
+ ls -R > /dev/null
+ cd sys
 Binary files orig-ev3/home/root/lms2012/sys/mod/d_usbdev.ko and dev-ev3/home/root/lms2012/sys/mod/d_usbdev.ko differ
 Only in dev-ev3/home/root/lms2012/sys/mod: nbd.ko
 Only in dev-ev3/home/root/lms2012/sys: uf2d

brick/scripts/img.js

@@ -1,8 +1,9 @@
 #!/bin/sh
 
 let fs = require("fs")
-  let bootargs = "mem=${memsize} initrd=${filesysaddr},${filesyssize} root=/dev/ram0 rw rootfstype=cramfs console=${console} ip=${ipaddr} lpj=747520 quiet"
+// we try to use shorter versions of all parameters for the additional parameters to fit
-let bootnews = "mem=64M initrd=0xC1180000,10M root=/dev/ram0 rw rootfstype=cramfs console=${console} lpj=747520 quiet musb_hdrc.debug=2"
+let bootargs = "mem=${memsize} initrd=${filesysaddr},${filesyssize} root=/dev/ram0 rw rootfstype=cramfs console=${console} ip=${ipaddr} lpj=747520 quiet"
+let bootnews = "mem=64M initrd=0xC1180000,10M root=1:0 rw rootfstype=cramfs console=${console} lpj=747520 musb_hdrc.use_dma=0 log_buf_len=128k quiet"
 let piggy = true
 
 function build() {