Difference between revisions of "NAND flash boot rootfs"

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Line 15: Line 15:
 
** '''rootfs.ubi''' or '''rootfs.ubifs'''
 
** '''rootfs.ubi''' or '''rootfs.ubifs'''
  
−
====Option 1====
+
====Option 1: web browser====
 
* Boot the camera from the micro SD card (<font color='red'>important for rootfs update</font>)
 
* Boot the camera from the micro SD card (<font color='red'>important for rootfs update</font>)
 
* Go to the http://192.168.0.9/update_software.html
 
* Go to the http://192.168.0.9/update_software.html
 
* Upload '''uImage''' and '''rootfs.ubi'''
 
* Upload '''uImage''' and '''rootfs.ubi'''
−
* Verify, download backup then Flash
+
* Verify-button, download backup then Flash-button
  
−
====Option 2: manual====
+
====Option 2: command line====
 
* Boot the camera from the micro SD card (<font color='red'>important for rootfs update</font>)
 
* Boot the camera from the micro SD card (<font color='red'>important for rootfs update</font>)
 
* Copy file to the camera, example from the PC terminal:
 
* Copy file to the camera, example from the PC terminal:
−
  $ scp boot.bin u-boot-dtb.img devicetree.dtb uImage rootfs.ubi root@192.168.0.9:/tmp/
+
  $ scp boot.bin u-boot-dtb.img devicetree.dtb uImage rootfs.ubi root@192.168.0.9:/<path-to-image-files>/
−
* Reflash what is needed:
+
* From the ssh session (ssh root@192.168.0.9) reflash what needs an update:
−
** Reflash SPL ('''boot.bin''', /dev/mtd0)
+
** Reflash rootfs ('''rootfs.ubi''', /dev/mtd4) (<font color='red'>radical</font>)
 
<font size='2'>
 
<font size='2'>
 
  cd <path-to-image-files>
 
  cd <path-to-image-files>
−
  # boot.bin
+
  flash_unlock /dev/mtd4
−
# mtd0 is 1MB (8 eraseblocks,128K = 1 block, there are 64 pages of 2048 per block)
+
flash_erase /dev/mtd4 0 2048
−
# erase only first 2 blocks, other block are reserved for copies
+
ubiformat /dev/mtd4 -f rootfs.ubi -s 2048 -O 2048
−
  flash_unlock /dev/mtd0
+
</font>
−
  flash_erase /dev/mtd0 0 2
+
OR
−
  nandwrite -n /dev/mtd0 -p boot.bin
+
** update rootfs (<font color='green'>recommended</font>)
 +
<font size='2'>
 +
  flash_unlock /dev/mtd4
 +
  ubiattach /dev/ubi_ctrl -m 4
 +
  # NOT NEEDED: ubimkvol /dev/ubi0 -N elphel393-rootfs -s 256MiB
 +
ubiupdatevol /dev/ubi0_0 rootfs.ubifs
 +
#
 +
# read: http://www.linux-mtd.infradead.org/faq/ubifs.html
 +
# read: http://free-electrons.com/blog/creating-flashing-ubi-ubifs-images/
 +
# read: http://www.linux-mtd.infradead.org/doc/ubi.html#L_volupdate
 +
# read: http://comments.gmane.org/gmane.linux.drivers.mtd/39415
 
</font>
 
</font>
−
** Reflash u-boot ('''u-boot-dtb.img''', /dev/mtd1)
+
** Reflash kernel ('''uImage''', /dev/mtd3)
 
<font size='2'>
 
<font size='2'>
 
  cd <path-to-image-files>
 
  cd <path-to-image-files>
−
  # u-boot-dtb.img
+
  # uImage
−
  # mtd1 is 4M (32 eraseblocks,128K = 1 block, there are 64 pages of 2048 per block)
+
  # mtd3 is 16M (128 eraseblocks,128K = 1 block, there are 64 pages of 2048 per block)
−
# erase only the 1st 8 blocks as image is <1M, leave unused area for backup copies
+
  flash_unlock /dev/mtd3
−
  flash_unlock /dev/mtd1
+
  flash_erase /dev/mtd3 0 128
−
  flash_erase /dev/mtd1 0 8
+
  nandwrite -n /dev/mtd3 -p uImage
−
  nandwrite -n /dev/mtd1 -p u-boot-dtb.img
 
 
</font>
 
</font>
 
** Reflash devicetree ('''devicetree.dtb''', /dev/mtd2)
 
** Reflash devicetree ('''devicetree.dtb''', /dev/mtd2)
Line 55: Line 64:
 
  nandwrite -n /dev/mtd2 -p devicetree.dtb
 
  nandwrite -n /dev/mtd2 -p devicetree.dtb
 
</font>
 
</font>
−
** Reflash kernel ('''uImage''', /dev/mtd3)
+
** Reflash u-boot ('''u-boot-dtb.img''', /dev/mtd1)
 
<font size='2'>
 
<font size='2'>
 
  cd <path-to-image-files>
 
  cd <path-to-image-files>
−
  # uImage
+
  # u-boot-dtb.img
−
  # mtd3 is 16M (128 eraseblocks,128K = 1 block, there are 64 pages of 2048 per block)
+
  # mtd1 is 4M (32 eraseblocks,128K = 1 block, there are 64 pages of 2048 per block)
−
  flash_unlock /dev/mtd3
+
# erase only the 1st 8 blocks as image is <1M, leave unused area for backup copies
−
  flash_erase /dev/mtd3 0 128
+
  flash_unlock /dev/mtd1
−
  nandwrite -n /dev/mtd3 -p uImage
+
  flash_erase /dev/mtd1 0 8
 +
  nandwrite -n /dev/mtd1 -p u-boot-dtb.img
 
</font>
 
</font>
−
** For rootfs there are 2 options:
+
** Reflash SPL ('''boot.bin''', /dev/mtd0)
−
*** update - <font color='green'>recommended</font>, '''rootfs.ubifs'''
 
−
*** reflash - <font color='red'>radical</font>, '''rootfs.ubi'''
 
−
Update:
 
−
<font size='2'>
 
−
flash_unlock /dev/mtd4
 
−
ubiattach /dev/ubi_ctrl -m 4
 
−
# NOT NEEDED: ubimkvol /dev/ubi0 -N elphel393-rootfs -s 256MiB
 
−
ubiupdatevol /dev/ubi0_0 rootfs.ubifs
 
−
#
 
−
# read: http://www.linux-mtd.infradead.org/faq/ubifs.html
 
−
# read: http://free-electrons.com/blog/creating-flashing-ubi-ubifs-images/
 
−
# read: http://www.linux-mtd.infradead.org/doc/ubi.html#L_volupdate
 
−
# read: http://comments.gmane.org/gmane.linux.drivers.mtd/39415
 
−
</font>
 
−
Reflash:
 
 
<font size='2'>
 
<font size='2'>
 
  cd <path-to-image-files>
 
  cd <path-to-image-files>
−
  flash_unlock /dev/mtd4
+
# boot.bin
−
  flash_erase /dev/mtd4 0 2048
+
# mtd0 is 1MB (8 eraseblocks,128K = 1 block, there are 64 pages of 2048 per block)
−
  ubiformat /dev/mtd4 -f rootfs.ubi -s 2048 -O 2048
+
# erase only first 2 blocks, other block are reserved for copies
 +
  flash_unlock /dev/mtd0
 +
  flash_erase /dev/mtd0 0 2
 +
  nandwrite -n /dev/mtd0 -p boot.bin
 
</font>
 
</font>
 +
 +
 
'''Note:''' Considering to store the u-boot (probably not, because 192K-max-boot.bin might not fit UBIFS driver), device tree and kernel on UBIFS partitions in future.
 
'''Note:''' Considering to store the u-boot (probably not, because 192K-max-boot.bin might not fit UBIFS driver), device tree and kernel on UBIFS partitions in future.
  
 
[[Category:Elphel393]]
 
[[Category:Elphel393]]

Revision as of 17:13, 16 December 2016

Reflash factory image

Notes

  • Will overwrite software/firmware or corrupt flash partition
  • To update u-boot images, device tree and kernel - booting from micro SD card is not required.
  • To update rootfs - boot from micro SD card otherwise a mounted flash partition will be rewritten, get corrupt and the camera might not boot - to recover, boot from micro SD card and reflash rootfs partition.
  • boot.bin, u-boot-dtb.img - most likely won't need updating at all. Only if their partitions get corrupt
    • As Zynq's BootROM performs 32KB jumps within the first 128MiB of flash in the search of a boot.bin header with a correct checksum it is possible to flash a few backup images to the 1st flash partition (mtd0) in the device tree. The partition size is 1MB, boot.bin size is normally around 100KB (<192KB - Zynq's OCM requirement)

Instructions

  • Use files from elphel393/bootable-images/elphel393/nand/
    • boot.bin
    • u-boot-dtb.img
    • devicetree.dtb
    • uImage
    • rootfs.ubi or rootfs.ubifs

Option 1: web browser

  • Boot the camera from the micro SD card (important for rootfs update)
  • Go to the http://192.168.0.9/update_software.html
  • Upload uImage and rootfs.ubi
  • Verify-button, download backup then Flash-button

Option 2: command line

  • Boot the camera from the micro SD card (important for rootfs update)
  • Copy file to the camera, example from the PC terminal:
$ scp boot.bin u-boot-dtb.img devicetree.dtb uImage rootfs.ubi root@192.168.0.9:/<path-to-image-files>/
  • From the ssh session (ssh root@192.168.0.9) reflash what needs an update:
    • Reflash rootfs (rootfs.ubi, /dev/mtd4) (radical)

cd <path-to-image-files>
flash_unlock /dev/mtd4
flash_erase /dev/mtd4 0 2048
ubiformat /dev/mtd4 -f rootfs.ubi -s 2048 -O 2048

OR

    • update rootfs (recommended)

flash_unlock /dev/mtd4
ubiattach /dev/ubi_ctrl -m 4
# NOT NEEDED: ubimkvol /dev/ubi0 -N elphel393-rootfs -s 256MiB
ubiupdatevol /dev/ubi0_0 rootfs.ubifs
# 
# read: http://www.linux-mtd.infradead.org/faq/ubifs.html
# read: http://free-electrons.com/blog/creating-flashing-ubi-ubifs-images/
# read: http://www.linux-mtd.infradead.org/doc/ubi.html#L_volupdate
# read: http://comments.gmane.org/gmane.linux.drivers.mtd/39415

    • Reflash kernel (uImage, /dev/mtd3)

cd <path-to-image-files>
# uImage
# mtd3 is 16M (128 eraseblocks,128K = 1 block, there are 64 pages of 2048 per block)
flash_unlock /dev/mtd3
flash_erase /dev/mtd3 0 128
nandwrite -n /dev/mtd3 -p uImage

    • Reflash devicetree (devicetree.dtb, /dev/mtd2)

cd <path-to-image-files>
# u-boot-dtb.img
# mtd2 is 1M (8 eraseblocks,128K = 1 block, there are 64 pages of 2048 per block)
flash_unlock /dev/mtd2
flash_erase /dev/mtd2 0 8
nandwrite -n /dev/mtd2 -p devicetree.dtb

    • Reflash u-boot (u-boot-dtb.img, /dev/mtd1)

cd <path-to-image-files>
# u-boot-dtb.img
# mtd1 is 4M (32 eraseblocks,128K = 1 block, there are 64 pages of 2048 per block)
# erase only the 1st 8 blocks as image is <1M, leave unused area for backup copies
flash_unlock /dev/mtd1
flash_erase /dev/mtd1 0 8
nandwrite -n /dev/mtd1 -p u-boot-dtb.img

    • Reflash SPL (boot.bin, /dev/mtd0)

cd <path-to-image-files>
# boot.bin
# mtd0 is 1MB (8 eraseblocks,128K = 1 block, there are 64 pages of 2048 per block)
# erase only first 2 blocks, other block are reserved for copies
flash_unlock /dev/mtd0
flash_erase /dev/mtd0 0 2
nandwrite -n /dev/mtd0 -p boot.bin


Note: Considering to store the u-boot (probably not, because 192K-max-boot.bin might not fit UBIFS driver), device tree and kernel on UBIFS partitions in future.

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