[U-Boot-Users] "Need help to Port Wget to U-boot"

[U-Boot-Users] "Need help to Port Wget to U-boot"

[nreddy at netenrich.com]

Hi All,


 We have an embedded system running on u-boot and Montavista Linux.
 We are planning to put "Wget" feature into u-boot.
  I am new to this Wget, but as of my knowledge Wget requires IP Stack and
  File system.
 Can anyone through some inputs on this.

 Any help appreciated.

Thanks in Advance,
Nagi

[U-Boot-Users] "Need help to Port Wget to U-boot"

[Wolfgang Denk]

In message <1483.61.95.208.2.1141799502.squirrel@61.95.208.2> you wrote:
> 
>  We are planning to put "Wget" feature into u-boot.
>   I am new to this Wget, but as of my knowledge Wget requires IP Stack and
>   File system.

Correct. Well, the file system could be avoided by just  storing  the
loaded  file  at  a  given memory address, but in any case you need a
more or less complete TCP/IP stsck, while U-Boot has only  a  minimal
implementation of UDB.

>  Can anyone through some inputs on this.

The task makes no sense. If you want to use wget, then just  boot  up
Linux.

Best regards,

Wolfgang Denk

-- 
Software Engineering:  Embedded and Realtime Systems,  Embedded Linux
Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: wd at denx.de
Status quo. Latin for "the mess we're in."

[U-Boot-Users] 'Need help to Port Wget to U-boot'

[nreddy at netenrich.com]

Hi Denk,
 Thanks for your suggestion.
  My requirement is before Linux boots up i should be able to use wget
from the U-boot.
 This requirement is to implement FAIL-SAFE condition in the u-boot itself.
 Because we are going to update Linux related frirmware in the field
except u-boot. Suppose if power goes off while copying to FLASH then we
can't make the device up and running.
 To avoid this problem we have planned to implement wget, so that u-boot
itself can pick the firmeware from our support site and program the
device.

 In this context i requested miling users to shoot some inputs.


Thanks,
Nagi



> In message <1483.61.95.208.2.1141799502.squirrel@61.95.208.2> you wrote:
>>
>>  We are planning to put "Wget" feature into u-boot.
>>   I am new to this Wget, but as of my knowledge Wget requires IP Stack
>> and
>>   File system.
>
> Correct. Well, the file system could be avoided by just  storing  the
> loaded  file  at  a  given memory address, but in any case you need a
> more or less complete TCP/IP stsck, while U-Boot has only  a  minimal
> implementation of UDB.
>
>>  Can anyone through some inputs on this.
>
> The task makes no sense. If you want to use wget, then just  boot  up
> Linux.
>
> Best regards,
>
> Wolfgang Denk
>
> --
> Software Engineering:  Embedded and Realtime Systems,  Embedded Linux
> Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: wd at denx.de
> Status quo. Latin for "the mess we're in."
>
>
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>

[U-Boot-Users] 'Need help to Port Wget to U-boot'

[Wolfgang Denk]

In message <34182.61.95.208.2.1141804776.squirrel@61.95.208.2> you wrote:
>
>   My requirement is before Linux boots up i should be able to use wget
> from the U-boot.

As mentioned before: is this is really what you want to do,  then  it
it  easier  to boot up Linux. Provide a minimal Linux image (probably
based on busybox and it's builtin version of wget) which does not get
overwritten in the field. Then never overwrite this emergency image.

Alternatively consider switching protocols. Instead  of  using  wget,
uyoiu could use NFS which is available in U-Boot.

>  This requirement is to implement FAIL-SAFE condition in the u-boot itself.
>  Because we are going to update Linux related frirmware in the field
> except u-boot. Suppose if power goes off while copying to FLASH then we
> can't make the device up and running.

So far this is a standard requirement which is common with many other
embedded systems.

>  To avoid this problem we have planned to implement wget, so that u-boot

This decision was wrong, as it requires a lot of stuff  that  is  not
available  in  U-Boot.  And  it  makes  no sense to put such stuff in
U-Boot, as this is a boot loader and not an OS. If you need wget, use
an OS. It's trivial to do.

You should reconsider your requirements and decisions.

> itself can pick the firmeware from our support site and program the
> device.

Change the protocol. Use NFS.

Best regards,

Wolfgang Denk

-- 
Software Engineering:  Embedded and Realtime Systems,  Embedded Linux
Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: wd at denx.de
For every complex problem, there is a solution that is simple,  neat,
and wrong.                                               - Mark Twain

[U-Boot-Users] 'Need help to Port Wget to U-boot'

[nreddy at netenrich.com]

Thanks for your valuable suggestion.

Regards,
Nagi


> In message <34182.61.95.208.2.1141804776.squirrel@61.95.208.2> you wrote:
>>
>>   My requirement is before Linux boots up i should be able to use wget
>> from the U-boot.
>
> As mentioned before: is this is really what you want to do,  then  it
> it  easier  to boot up Linux. Provide a minimal Linux image (probably
> based on busybox and it's builtin version of wget) which does not get
> overwritten in the field. Then never overwrite this emergency image.
>
> Alternatively consider switching protocols. Instead  of  using  wget,
> uyoiu could use NFS which is available in U-Boot.
>
>>  This requirement is to implement FAIL-SAFE condition in the u-boot
>> itself.
>>  Because we are going to update Linux related frirmware in the field
>> except u-boot. Suppose if power goes off while copying to FLASH then we
>> can't make the device up and running.
>
> So far this is a standard requirement which is common with many other
> embedded systems.
>
>>  To avoid this problem we have planned to implement wget, so that u-boot
>
> This decision was wrong, as it requires a lot of stuff  that  is  not
> available  in  U-Boot.  And  it  makes  no sense to put such stuff in
> U-Boot, as this is a boot loader and not an OS. If you need wget, use
> an OS. It's trivial to do.
>
> You should reconsider your requirements and decisions.
>
>> itself can pick the firmeware from our support site and program the
>> device.
>
> Change the protocol. Use NFS.
>
> Best regards,
>
> Wolfgang Denk
>
> --
> Software Engineering:  Embedded and Realtime Systems,  Embedded Linux
> Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: wd at denx.de
> For every complex problem, there is a solution that is simple,  neat,
> and wrong.                                               - Mark Twain
>

[U-Boot-Users] 'Need help to Port Wget to U-boot'

[Steven Scholz]

>> itself can pick the firmeware from our support site and program the
>> device.
> 
> Change the protocol. Use NFS.

Maybe tftp is enough.

Or might there be issues when using tftp not only in a LAN but the
internet? Firewall restrictions?

--
Steven

[U-Boot-Users] 'Need help to Port Wget to U-boot'

[nreddy at netenrich.com]

Hi Denk,
We are finalizing the requirements more or less as you suggested.

  But to get more inputs from the industry, i searched some of the
embedded devices manuals etc. to know how they are managing the firmware
up gradation when there is a power failure. But i could not get any
useful information. All are talking about there should not be power
failure while writing to the FLASH.

 Can you please let me know what is the industry standard to upgrade the
firmware of the devices, which are deployed remotely?

Regards,
Nagi



> In message <34182.61.95.208.2.1141804776.squirrel@61.95.208.2> you wrote:
>>
>>   My requirement is before Linux boots up i should be able to use wget
>> from the U-boot.
>
> As mentioned before: is this is really what you want to do,  then  it
> it  easier  to boot up Linux. Provide a minimal Linux image (probably
> based on busybox and it's builtin version of wget) which does not get
> overwritten in the field. Then never overwrite this emergency image.
>
> Alternatively consider switching protocols. Instead  of  using  wget,
> uyoiu could use NFS which is available in U-Boot.
>
>>  This requirement is to implement FAIL-SAFE condition in the u-boot
>> itself.
>>  Because we are going to update Linux related frirmware in the field
>> except u-boot. Suppose if power goes off while copying to FLASH then we
>> can't make the device up and running.
>
> So far this is a standard requirement which is common with many other
> embedded systems.
>
>>  To avoid this problem we have planned to implement wget, so that u-boot
>
> This decision was wrong, as it requires a lot of stuff  that  is  not
> available  in  U-Boot.  And  it  makes  no sense to put such stuff in
> U-Boot, as this is a boot loader and not an OS. If you need wget, use
> an OS. It's trivial to do.
>
> You should reconsider your requirements and decisions.
>
>> itself can pick the firmeware from our support site and program the
>> device.
>
> Change the protocol. Use NFS.
>
> Best regards,
>
> Wolfgang Denk
>
> --
> Software Engineering:  Embedded and Realtime Systems,  Embedded Linux
> Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: wd at denx.de
> For every complex problem, there is a solution that is simple,  neat,
> and wrong.                                               - Mark Twain
>

[U-Boot-Users] 'Need help to Port Wget to U-boot'

[Wolfgang Denk]

In message <2084.61.95.208.2.1141908617.squirrel@61.95.208.2> you wrote:
> 
>  Can you please let me know what is the industry standard to upgrade the
> firmware of the devices, which are deployed remotely?

I am not aware of any such "industry standard".

Best regards,

Wolfgang Denk

-- 
Software Engineering:  Embedded and Realtime Systems,  Embedded Linux
Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: wd at denx.de
It's all Klatchian to me.
        - Terry Pratchett & Stephen Briggs, _The Discworld Companion_

[U-Boot-Users] 'Need help to Port Wget to U-boot'

[Friedrich, Lars]

>  Can you please let me know what is the industry standard

The industry standard is to write firmware without bugs.

Best regards,
Lars Friedrich