Difference between revisions of "Loading JFFS2 Images Onto a Board"

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{{todo|Add some text (11.06.13-08:24->MW+)(11.06.13-17:55->MD+)|Michael Welling|project=oe 4,oe 5,mw,md,InProgress}}
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{{todo|SEOKWREV, held for FTP server update; (11.06.13-08:24->MW+)(11.06.13-17:55->MD+)(12.11.13-13:56->MW+)(12.19.13-18:40->MD+);(12.20.13-11:30->KY+);(03.06.14-15:05->BS-);(04.11.14-11:35->BS+)|Michael Welling|project=oe 4,oe 5,mw,md,bs,SEOKWREV}}
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{{#seo:
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|title=Loading JFFS2 Images Onto a Board
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|titlemode=append
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|keywords=JFFS2,U-Boot,TFTP Server
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|description=The section provides links and useful information for performing JFFS2 programming using U-Boot and Redboot.
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}}
 
== Background ==
 
== Background ==
  
−
Journalling Flash File System version 2 or JFFS2 is a log-structured file system used on flash memory devices. JFFS2 images are typically created on a development PC and deployed to an embedded target using TFTP commands from the target's bootloader. Deployment requires both serial and Ethernet connection to the board along with a TFTP server set up on your development machine.
+
Journalling Flash File System version 2, or JFFS2, is a log-structured file system used on flash memory devices. JFFS2 images are typically created on a development PC and deployed to an embedded target using TFTP commands from the target's bootloader. Deployment requires both serial and Ethernet connections to the board along with a TFTP server set up on a development machine.
  
−
For instructions on installing a TFTP server on your development PC:
+
For instructions on installing a TFTP server on a development PC:
 
[[Installing TFTP server]]
 
[[Installing TFTP server]]
  
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JFFS2 file systems are available for download on [ftp://ftp.emacinc.com EMAC's FTP site].
 
JFFS2 file systems are available for download on [ftp://ftp.emacinc.com EMAC's FTP site].
−
'''We really, really, really need to update our public FTP site'''
 
  
 
For instructions on creating a JFFS2 file system image see the following page:
 
For instructions on creating a JFFS2 file system image see the following page:
 
[[Creating JFFS2 Images]]
 
[[Creating JFFS2 Images]]
  
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== General ==
+
== General Information ==
 +
The section below provides links and useful information for performing JFFS2 programming using U-Boot and Redboot. The links provide pages with the generic procedures for programming EMAC modules based on the bootloader type.
  
−
There are some common steps involved with programming any type of SoM.  First, you need to get an IP address for your SoM by doing...
+
=== Using U-Boot ===
 +
Refer to the following pages for instructions on accessing U-Boot on the serial console: <br />
 +
[[U-Boot Overview]]<br />
 +
[[Loading Images with U-Boot]]
  
−
Then, you need to set the IP address of the tftp server like so...
+
From the U-Boot prompt it is possible to set the target's IP address dynamically using DHCP:
 +
<syntaxhighlight lang="console">
 +
U-Boot> set autoload no
 +
U-Boot> dhcp
 +
</syntaxhighlight>
  
−
If you want to see the configuration of your bootloader, these commands will show you...
+
The target's IP can also be manually set using the <code>ipaddr</code> environment variable as follows:
 +
<syntaxhighlight lang="console">
 +
U-Boot> set ipaddr 192.168.0.101
 +
</syntaxhighlight>
 +
 
 +
Once the target IP is set, the TFTP server's IP address must be specified:
 +
<syntaxhighlight lang="console">
 +
U-Boot> set serverip 192.168.0.100
 +
</syntaxhighlight>
  
−
The bootloader has help built in. Do these things to learn more...
+
The configuration of the bootloader environment can be checked at any time using the <code>printenv</code> command. As described in [[Loading Images with U-Boot]], the JFFS2 image will then be loaded into SDRAM and programmed into flash. A full example for the SoM-9G45 will be provided below.
  
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'''NOTE: If you want to put this information in a/the general uBoot page and link to it, that works too.  But make sure they know they need to perform those steps.'''
+
== Full Example Using U-Boot (SoM-9G45) ==
 +
This section provides a detailed example of loading a JFFS2 file system onto the SoM-9G45 and shows how U-Boot responds to the various commands when performed successfully.
 +
 +
  U-Boot 2009.06-rc1-svn1786 (Nov 28 2011 - 17:22:29)
 
   
 
   
−
----
+
EMAC Inc. SOM-9M10/G45M
 +
 +
I2C:  ready
 +
DRAM:  128 MB
 +
NAND:  256 MiB
 +
DataFlash:AT45DB321
 +
Nb pages:  8192
 +
Page Size:    528
 +
Size= 4325376 bytes
 +
Logical address: 0xC0000000
 +
Area 0: C0000000 to C00041FF (RO) Bootstrap
 +
Area 1: C0004200 to C00083FF      Environment
 +
Area 2: C0008400 to C0041FFF (RO) U-Boot
 +
Area 3: C0042000 to C0251FFF      Kernel
 +
Area 4: C0252000 to C041FFFF      FS
 +
In:    serial
 +
Out:  serial
 +
Err:  serial
 +
Net:  macb0
 +
macb0: Starting autonegotiation...
 +
macb0: Autonegotiation complete
 +
macb0: link up, 100Mbps full-duplex (lpa: 0xcde1)
 +
Hit any key to stop autoboot:  0
 +
U-Boot> set autoload no
 +
U-Boot> dhcp
 +
macb0: link up, 100Mbps full-duplex (lpa: 0xcde1)
 +
BOOTP broadcast 1
 +
DHCP client bound to address 10.0.2.221
 +
U-Boot> set serverip 10.0.2.168
 +
U-Boot> tftp 0x74000000 som-9g45m-rootfs.jffs2
 +
macb0: link up, 100Mbps full-duplex (lpa: 0xcde1)
 +
Using macb0 device
 +
TFTP from server 10.0.2.168; our IP address is 10.0.2.221
 +
Filename 'som-9g45m-rootfs.jffs2'.
 +
Load address: 0x74000000
 +
Loading: #################################################################
 +
                                  ...
 +
          ####################################################
 +
done
 +
Bytes transferred = 27473444 (1a33624 hex)
 +
U-Boot> nand erase
 +
 +
NAND erase: device 0 whole chip
 +
Skipping bad block at  0x03320000                                           
 +
Skipping bad block at  0x079e0000                                           
 +
Skipping bad block at  0x085e0000                                           
 +
Erasing at 0xffe0000 -- 100% complete.
 +
OK
 +
U-Boot> nand write.jffs2 0x74000000 0x0 ${filesize}
 +
 +
NAND write: device 0 offset 0x0, size 0x1a33624
 +
NAND write: Padding to page size...
 +
27473444 bytes written: OK
 +
U-Boot>
  
−
=== Full Examples ===
+
== Quick Reference (By Target Type) ==
 +
This section provides a quick reference for programming various targets with a JFFS2 image.
 +
It is assumed that the Ethernet setup is performed as described above in the General Information section.
  
−
----
 
−
 
−
'''Show some examples of performing every step, from start to boot.  Our most common products would be best to use for this, so the 9g45 and the 9G20, I believe, would be the best ones to show.'''
 
−
 
−
'''This would also be a good place to note that they may have to change their video settings for their board, or set other kernel commandline arguments.  You can link them to documentation for the kernel for this.  The video settings information would be good to have in the quick reference section below, though.  A quick reference by carrier type section, for our standard carriers, would be a good place for this.  Also, anything else that you can think of that might be specific to a carrier should be there.  Alternatively, maybe we should have a different page for this.  That way, we could share it across different pages for different image types.  If you choose that route, then the page will need to be "bragged about" here, so that people will be sure to look at the page rather than e-mailing us, "my screen doesn't work."  You will probably also want to figure out a better formatting than the quick bit I added here.'''
 
−
== Quick Reference (By Target Type) ==
 
 
=== SoM-9260M ===
 
=== SoM-9260M ===
 
<syntaxhighlight lang="bash">
 
<syntaxhighlight lang="bash">
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U-Boot> erase 0x10400000 0x11ffffff
 
U-Boot> erase 0x10400000 0x11ffffff
 
U-Boot> cp.b 0x20000000 0x10400000 ${filesize}
 
U-Boot> cp.b 0x20000000 0x10400000 ${filesize}
 +
# Erase the second bank for 64Mb modules
 +
U-Boot> erase 0x12000000 0x13ffffff
 +
# OE 4 - set filesystem read/write on first boot
 +
U-Boot> setenv bootargs 'console=ttyS3,115200 root=/dev/mtdblock3 rootfstype=jffs2 rw'
 
</syntaxhighlight>
 
</syntaxhighlight>
  
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U-Boot> nand erase
 
U-Boot> nand erase
 
U-Boot> nand write.jffs2 0x74000000 0x0 ${filesize}
 
U-Boot> nand write.jffs2 0x74000000 0x0 ${filesize}
−
</syntaxhighlight>
 
−
 
−
=== SoM-9307M ===
 
−
<syntaxhighlight lang="bash">
 
−
Redboot> fis unlock -f 0x60000000 -l 0x1fdffff
 
−
Redboot> load -r -v -b 0x300000 -h 10.0.2.60 som-9307m-rootfs.jffs2
 
−
Redboot> fis create -b 0x300000 -l 0x1c00000 jffs2
 
−
</syntaxhighlight>
 
−
 
−
=== IPAC-9302 ===
 
−
<syntaxhighlight lang="bash">
 
−
Redboot> fis unlock -f 0x60000000 -l 0x1fdffff
 
−
Redboot> load -r -v -b 0x300000 -h 10.0.2.60 ipac-9302-rootfs.jffs2
 
−
Redboot> fis create -b 0x300000 -l 0x1c00000 jffs2
 
 
</syntaxhighlight>
 
</syntaxhighlight>

Latest revision as of 10:23, 5 June 2018

TODO: {{#todo:SEOKWREV, held for FTP server update; (11.06.13-08:24->MW+)(11.06.13-17:55->MD+)(12.11.13-13:56->MW+)(12.19.13-18:40->MD+);(12.20.13-11:30->KY+);(03.06.14-15:05->BS-);(04.11.14-11:35->BS+)|Michael Welling|oe 4,oe 5,mw,md,bs,SEOKWREV}}

Background

Journalling Flash File System version 2, or JFFS2, is a log-structured file system used on flash memory devices. JFFS2 images are typically created on a development PC and deployed to an embedded target using TFTP commands from the target's bootloader. Deployment requires both serial and Ethernet connections to the board along with a TFTP server set up on a development machine.

For instructions on installing a TFTP server on a development PC: Installing TFTP server

For details on connecting to the serial port for an embedded target: Serial Connections

JFFS2 file systems are available for download on EMAC's FTP site.

For instructions on creating a JFFS2 file system image see the following page: Creating JFFS2 Images

General Information

The section below provides links and useful information for performing JFFS2 programming using U-Boot and Redboot. The links provide pages with the generic procedures for programming EMAC modules based on the bootloader type.

Using U-Boot

Refer to the following pages for instructions on accessing U-Boot on the serial console:
U-Boot Overview
Loading Images with U-Boot

From the U-Boot prompt it is possible to set the target's IP address dynamically using DHCP: 

U-Boot> set autoload no
U-Boot> dhcp

The target's IP can also be manually set using the ipaddr environment variable as follows: 

U-Boot> set ipaddr 192.168.0.101

Once the target IP is set, the TFTP server's IP address must be specified: 

U-Boot> set serverip 192.168.0.100

The configuration of the bootloader environment can be checked at any time using the printenv command. As described in Loading Images with U-Boot, the JFFS2 image will then be loaded into SDRAM and programmed into flash. A full example for the SoM-9G45 will be provided below.

Full Example Using U-Boot (SoM-9G45)

This section provides a detailed example of loading a JFFS2 file system onto the SoM-9G45 and shows how U-Boot responds to the various commands when performed successfully. 

U-Boot 2009.06-rc1-svn1786 (Nov 28 2011 - 17:22:29) 

EMAC Inc. SOM-9M10/G45M 

I2C:   ready
DRAM:  128 MB
NAND:  256 MiB
DataFlash:AT45DB321
Nb pages:   8192
Page Size:    528
Size= 4325376 bytes
Logical address: 0xC0000000
Area 0: C0000000 to C00041FF (RO) Bootstrap
Area 1: C0004200 to C00083FF      Environment
Area 2: C0008400 to C0041FFF (RO) U-Boot
Area 3: C0042000 to C0251FFF      Kernel
Area 4: C0252000 to C041FFFF      FS
In:    serial
Out:   serial
Err:   serial
Net:   macb0
macb0: Starting autonegotiation...
macb0: Autonegotiation complete
macb0: link up, 100Mbps full-duplex (lpa: 0xcde1)
Hit any key to stop autoboot:  0 
U-Boot> set autoload no 
U-Boot> dhcp
macb0: link up, 100Mbps full-duplex (lpa: 0xcde1)
BOOTP broadcast 1
DHCP client bound to address 10.0.2.221
U-Boot> set serverip 10.0.2.168
U-Boot> tftp 0x74000000 som-9g45m-rootfs.jffs2
macb0: link up, 100Mbps full-duplex (lpa: 0xcde1)
Using macb0 device
TFTP from server 10.0.2.168; our IP address is 10.0.2.221
Filename 'som-9g45m-rootfs.jffs2'.
Load address: 0x74000000
Loading: ################################################################# 
                                  ...
         ####################################################
done
Bytes transferred = 27473444 (1a33624 hex)
U-Boot> nand erase

NAND erase: device 0 whole chip
Skipping bad block at  0x03320000                                            
Skipping bad block at  0x079e0000                                            
Skipping bad block at  0x085e0000                                            
Erasing at 0xffe0000 -- 100% complete.
OK
U-Boot> nand write.jffs2 0x74000000 0x0 ${filesize}

NAND write: device 0 offset 0x0, size 0x1a33624
NAND write: Padding to page size... 
27473444 bytes written: OK
U-Boot>

Quick Reference (By Target Type)

This section provides a quick reference for programming various targets with a JFFS2 image. It is assumed that the Ethernet setup is performed as described above in the General Information section.

SoM-9260M

U-Boot> tftp 0x20000000 som-9260m-rootfs.jffs2
U-Boot> protect off all
U-Boot> erase 0x10400000 0x11ffffff
U-Boot> cp.b 0x20000000 0x10400000 ${filesize}
# Erase the second bank for 64Mb modules
U-Boot> erase 0x12000000 0x13ffffff
# OE 4 - set filesystem read/write on first boot
U-Boot> setenv bootargs 'console=ttyS3,115200 root=/dev/mtdblock3 rootfstype=jffs2 rw'

SoM-9G20M

U-Boot> tftp 0x20000000 som-9g20m-rootfs.jffs2
U-Boot> nand erase
U-Boot> nand write.jffs2 0x20000000 0x0 ${filesize}

SoM-9G45M

U-Boot> tftp 0x74000000 som-9g45m-rootfs.jffs2
U-Boot> nand erase
U-Boot> nand write.jffs2 0x74000000 0x0 ${filesize}

SoM-9M10M

U-Boot> tftp 0x74000000 som-9m10m-rootfs.jffs2
U-Boot> nand erase
U-Boot> nand write.jffs2 0x74000000 0x0 ${filesize}
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