From mboxrd@z Thu Jan  1 00:00:00 1970
From: Joey Oravec <joravec@drewtech.com>
Date: Tue, 17 Jul 2007 08:54:34 -0400
Subject: [U-Boot-Users] Implementation of serial console redirection in
	uboot
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<yasothabalanr@gmail.com> wrote in message 
news:22587334.1242731184650886880.JavaMail.nabble at isper.nabble.com...
>I am using Uboot as my boot loader.
>
> Actually here I want to do console redirection through USB port.
>
> So that I have to modify console redirection via serial code to console 
> redirection via of USB
>
> To do that first I want to know how serial console redirection is done in 
> the UBOOT code. i.e., how in uboot the "serial console redirection" is 
> implemented.
>
> For console redirection(serial) there should be some code, somewhere in 
> the UBoot. I want to know how and where(in file,in which function) the 
> console redirection is implemented. [I have found how the configuration is 
> done for console redirection]

You have posted the same question several times. I have already responded to 
you. In case you deleted the email, see 
http://article.gmane.org/gmane.comp.boot-loaders.u-boot/30132

File common/console.c and common/devices.c contain everything. When you 
device_register(), you're inserting a new item into the devlist. When you 
set the stdin, stdout, or stderr you're calling console_setfile() which 
assigns a function pointer for each I/O function. When u-boot wants to read 
or display a character it follows the function pointer stored in global 
data.

Please read my previous posting. Use lcd.c as an example. Write 4 new 
functions that implement getc, tstc, putc, and puts. Register these as I/O 
using device_register() and choose them by setting stdin, stdout, and 
stderr.

-joey