U-boot-gena2x

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(crc32.pl is required to run envedit.pl)
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I decided to put my version of u-boot here, along with short FAQ and list of known bugs. Please feel free to add your bugs or questions here.
+
I decided to put my version of u-boot here, along with a short FAQ and list of known bugs. Please feel free to add your bugs or questions here.
  
Current version of u-boot fully support uploading and downloading via dfu, booting any know distro, fully configurable, and has no known grave bugs.
+
The current version of u-boot fully supports uploading and downloading via dfu, booting any know distro, is fully configurable, and has no known grave bugs.
  
 
== List of changes ==
 
== List of changes ==
Line 17: Line 17:
  
 
== Binaries ==
 
== Binaries ==
Public freerunners should have same bootloader (board v5 and later).
+
Public freerunners should have the same bootloader (board v5 and later).
 
Latest binary version is here [http://www.bsdmn.com/openmoko/uboot/binary/].
 
Latest binary version is here [http://www.bsdmn.com/openmoko/uboot/binary/].
  
to use u-boot as NAND bootloader, you should flash binary to special partition:
+
to use u-boot as NAND bootloader, you should flash the binary to the special partition:
 
  sudo dfu-util -a u-boot -D u-boot_g2x_2.udfu
 
  sudo dfu-util -a u-boot -D u-boot_g2x_2.udfu
  
Line 26: Line 26:
 
NAND uboot occupies 2 partitions on NAND, one partition for u-boot itself and one for it's configuration.
 
NAND uboot occupies 2 partitions on NAND, one partition for u-boot itself and one for it's configuration.
  
To setup u-boot, easiest way is to edit simple text file on your host and then upload it to your phone with dfu-util.
+
To setup u-boot, the easiest way is to edit the simple text file on your computer and then upload it to your phone with dfu-util.
  
Sample text config may be found [http://www.bsdmn.com/openmoko/uboot/config/environment.in here]. This version support various kind of boot options in menu. You may use it as sample for your config.
+
Sample text config may be found [http://www.bsdmn.com/openmoko/uboot/config/environment.in here]. This version supports various kinds of boot options in the menu. You may use it as a sample for your config.
  
If you switching from qi, just run boot your distro with Qi, do cat /proc/cmdline and compare/update parameters in config file.
+
If you are switching from qi, just boot your distro with Qi, then do cat /proc/cmdline and compare/update the parameters in your config file.
  
Then you edited config file to fit your needs, you should prepare it (this adds crc):
+
Then you can edit the config file to fit your needs, you should prepare it (this adds crc):
  
 
get envedit.pl and crc32.pl from [http://svn.openmoko.org/trunk/src/host/devirginator/] and run:
 
get envedit.pl and crc32.pl from [http://svn.openmoko.org/trunk/src/host/devirginator/] and run:
Line 48: Line 48:
 
|root=/dev/mtdblock6|| rootfs is on usual location on NAND
 
|root=/dev/mtdblock6|| rootfs is on usual location on NAND
 
|-
 
|-
|rootwait|| need for booting from SD. force kernel to delay boot until sd card will be ready. better than older rootdelay=
+
|rootwait|| needed for booting from SD. force kernel to delay boot until sd card is ready. better than older rootdelay=
 
|-
 
|-
 
|panic=20|| on kernel crash, reboot automatically after 20 second delay. useful for lindi's ramconsole patch
 
|panic=20|| on kernel crash, reboot automatically after 20 second delay. useful for lindi's ramconsole patch
Line 54: Line 54:
 
|hardware_ecc=1|| use hardware ecc support for NAND, this is not default option use only if your rootfs NAND is flashed not with dfu-util, but with direct copy from sd. this speeds up NAND read on zlib-compressed ubi by 8%.
 
|hardware_ecc=1|| use hardware ecc support for NAND, this is not default option use only if your rootfs NAND is flashed not with dfu-util, but with direct copy from sd. this speeds up NAND read on zlib-compressed ubi by 8%.
 
|-
 
|-
|rootfstype=XX|| need if your rootfs is ext2 to force kernel to use ext2 driver not ext3. use if kernel can't detect partition type
+
|rootfstype=XX|| needed if your rootfs is ext2 to force kernel to use ext2 driver not ext3. use if kernel can't detect partition type
 
|-
 
|-
 
|ubi.mtd=6,2048|| claim 6th mtd partition as ubi layer with 2048 page align
 
|ubi.mtd=6,2048|| claim 6th mtd partition as ubi layer with 2048 page align
Line 65: Line 65:
 
== How to use ==
 
== How to use ==
  
By default if you press 'power' button the "bootcmd" from your config is executed, so setup it accordingly to you default distribution.
+
By default, if you press the 'power' button, the "bootcmd" from your config is executed, so set it up accordingly for your default distribution.
  
To see boot menu and select needed boot method, hold 'power', wait 1 second and hold 'aux', wait 1 more second and release both.
+
To see the boot menu and select desired boot method, hold 'power', wait 1 second and then hold 'aux', wait 1 more second and release both.
  
 
== Known bugs ==
 
== Known bugs ==
I am working to fix this bugs now:
+
I am working to fix these bugs now:
 
*sd reads correct data only 50% of times, so sd boot  
 
*sd reads correct data only 50% of times, so sd boot  
 
*NAND hw ecc is not supported
 
*NAND hw ecc is not supported
*u-boot can't boot system if battery fully discharged (workaround exist)
+
*u-boot can't boot system if battery is fully discharged (workaround exist)
  
 
[[Category:Bootloaders]]
 
[[Category:Bootloaders]]

Revision as of 18:38, 29 December 2010

I decided to put my version of u-boot here, along with a short FAQ and list of known bugs. Please feel free to add your bugs or questions here.

The current version of u-boot fully supports uploading and downloading via dfu, booting any know distro, is fully configurable, and has no known grave bugs.

Contents

List of changes

This version of u-boot is based on openmoko's stable branch of u-boot. Git can be viewed here.

Significant patches are:

Version 2:

  • GPS is not powered up on boot
  • Leave all serial ports setup to kernel

Version 1:

  • 2-4-2 timings
  • GPS should work after resume

Binaries

Public freerunners should have the same bootloader (board v5 and later). Latest binary version is here [1].

to use u-boot as NAND bootloader, you should flash the binary to the special partition:

sudo dfu-util -a u-boot -D u-boot_g2x_2.udfu

How to setup

NAND uboot occupies 2 partitions on NAND, one partition for u-boot itself and one for it's configuration.

To setup u-boot, the easiest way is to edit the simple text file on your computer and then upload it to your phone with dfu-util.

Sample text config may be found here. This version supports various kinds of boot options in the menu. You may use it as a sample for your config.

If you are switching from qi, just boot your distro with Qi, then do cat /proc/cmdline and compare/update the parameters in your config file.

Then you can edit the config file to fit your needs, you should prepare it (this adds crc):

get envedit.pl and crc32.pl from [2] and run:

./envedit.pl -s 262144 -f environment.in > u-boot_env.in

then flash resulting file:

sudo dfu-util -a u-boot_env -D u-boot_env.in

Useful kernel options

option description
root=/dev/mmcblk0p2 rootfs is second partition on SD card
root=/dev/mtdblock6 rootfs is on usual location on NAND
rootwait needed for booting from SD. force kernel to delay boot until sd card is ready. better than older rootdelay=
panic=20 on kernel crash, reboot automatically after 20 second delay. useful for lindi's ramconsole patch
hardware_ecc=1 use hardware ecc support for NAND, this is not default option use only if your rootfs NAND is flashed not with dfu-util, but with direct copy from sd. this speeds up NAND read on zlib-compressed ubi by 8%.
rootfstype=XX needed if your rootfs is ext2 to force kernel to use ext2 driver not ext3. use if kernel can't detect partition type
ubi.mtd=6,2048 claim 6th mtd partition as ubi layer with 2048 page align
rootflags=compr=zlib,no_chk_data_crc mount options of rootfs, use no_chk_data_crc to speed up ubifs by 8%
mem=127M reserve 1Mb if you using lindi's ramcomsole patch

How to use

By default, if you press the 'power' button, the "bootcmd" from your config is executed, so set it up accordingly for your default distribution.

To see the boot menu and select desired boot method, hold 'power', wait 1 second and then hold 'aux', wait 1 more second and release both.

Known bugs

I am working to fix these bugs now:

  • sd reads correct data only 50% of times, so sd boot
  • NAND hw ecc is not supported
  • u-boot can't boot system if battery is fully discharged (workaround exist)
Personal tools

I decided to put my version of u-boot here, along with short FAQ and list of known bugs. Please feel free to add your bugs or questions here.

Current version of u-boot fully support uploading and downloading via dfu, booting any know distro, fully configurable, and has no known grave bugs.

List of changes

This version of u-boot is based on openmoko's stable branch of u-boot. Git can be viewed here.

Significant patches are:

Version 2:

  • GPS is not powered up on boot
  • Leave all serial ports setup to kernel

Version 1:

  • 2-4-2 timings
  • GPS should work after resume

Binaries

Public freerunners should have same bootloader (board v5 and later). Latest binary version is here [1].

to use u-boot as NAND bootloader, you should flash binary to special partition:

sudo dfu-util -a u-boot -D u-boot_g2x_2.udfu

How to setup

NAND uboot occupies 2 partitions on NAND, one partition for u-boot itself and one for it's configuration.

To setup u-boot, easiest way is to edit simple text file on your host and then upload it to your phone with dfu-util.

Sample text config may be found here. This version support various kind of boot options in menu. You may use it as sample for your config.

If you switching from qi, just run boot your distro with Qi, do cat /proc/cmdline and compare/update parameters in config file.

Then you edited config file to fit your needs, you should prepare it (this adds crc):

get envedit.pl and crc32.pl from [2] and run:

./envedit.pl -s 262144 -f environment.in > u-boot_env.in

then flash resulting file:

sudo dfu-util -a u-boot_env -D u-boot_env.in

Useful kernel options

option description
root=/dev/mmcblk0p2 rootfs is second partition on SD card
root=/dev/mtdblock6 rootfs is on usual location on NAND
rootwait need for booting from SD. force kernel to delay boot until sd card will be ready. better than older rootdelay=
panic=20 on kernel crash, reboot automatically after 20 second delay. useful for lindi's ramconsole patch
hardware_ecc=1 use hardware ecc support for NAND, this is not default option use only if your rootfs NAND is flashed not with dfu-util, but with direct copy from sd. this speeds up NAND read on zlib-compressed ubi by 8%.
rootfstype=XX need if your rootfs is ext2 to force kernel to use ext2 driver not ext3. use if kernel can't detect partition type
ubi.mtd=6,2048 claim 6th mtd partition as ubi layer with 2048 page align
rootflags=compr=zlib,no_chk_data_crc mount options of rootfs, use no_chk_data_crc to speed up ubifs by 8%
mem=127M reserve 1Mb if you using lindi's ramcomsole patch

How to use

By default if you press 'power' button the "bootcmd" from your config is executed, so setup it accordingly to you default distribution.

To see boot menu and select needed boot method, hold 'power', wait 1 second and hold 'aux', wait 1 more second and release both.

Known bugs

I am working to fix this bugs now:

  • sd reads correct data only 50% of times, so sd boot
  • NAND hw ecc is not supported
  • u-boot can't boot system if battery fully discharged (workaround exist)