From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from gdatech.co.in (mail.gdatech.co.in [202.144.30.226]) by ozlabs.org (Postfix) with ESMTP id 37DCE67A3A for ; Thu, 10 Aug 2006 17:10:41 +1000 (EST) Received: from [192.168.0.2] (localhost.localdomain [127.0.0.1]) by predator.gdatech.co.in (Postfix-out) with ESMTP id 9FCBE8780BA for ; Thu, 10 Aug 2006 00:10:21 -0700 (PDT) Received: from gdatech.co.in ([192.168.0.3]) by [127.0.0.1] ([127.0.0.1]) (port 7027) (Abaca EPG outproxy filter 1.3.4.5154-maint13 $Rev: 5154 $) id r68a001021D-00-2 for linuxppc-embedded@ozlabs.org; Thu, 10 Aug 2006 00:10:21 -0700 Received: from mail.gdatech.co.in (unknown [192.168.0.1]) by predator.gdatech.co.in (Postfix-out) with ESMTP id 601308780A7 for ; Thu, 10 Aug 2006 00:10:21 -0700 (PDT) Message-ID: <44DADBDB.1050806@gmail.com> Date: Thu, 10 Aug 2006 12:40:19 +0530 From: sudheer MIME-Version: 1.0 To: Andrey Volkov Subject: Re: regarding pci vga card output with powerpc References: <44D7097C.7040907@gmail.com> <44DA6A72.7020502@varma-el.com> <44DABF53.5020908@gmail.com> <44DACE0E.2050505@varma-el.com> In-Reply-To: <44DACE0E.2050505@varma-el.com> Content-Type: multipart/alternative; boundary="------------070902060505080600090709" Cc: linuxppc-embedded@ozlabs.org List-Id: Linux on Embedded PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , This is a multi-part message in MIME format. --------------070902060505080600090709 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Andrey Volkov wrote: > sudheer wrote: > >> Andrey Volkov wrote: >> >>> urwithsudheer wrote: >>> >>>> Hello All, >>>> I am working with a pci based vga card. I have connected the vga card >>>> next to the pci slot of my target processor on the baseboard. >>>> I have connected a monitor to the vga card. >>>> When i boot linux from minicom, i could see all the kernel log >>>> messages on both the minicom and vga card monitor. But on the vga >>>> monitor, i could not see any messages after asking for login as below: >>>> . >>>> . >>>> >>>> Mounting filesystems >>>> Running depmod >>>> Setting up networking on loopback device: >>>> Setting up networking on eth0: >>>> eth0: PHY is Marvell 88E11x1 (1410cc2) >>>> Adding static route for default gateway to 192.168.3.1: >>>> Setting nameserver to 192.168.0.1 in /etc/resolv.conf: >>>> Starting inetd: >>>> >>>> login: >>>> >>>> >>>> Though i am entering my login and passwd at the minicom, nothing >>>> comes on to the vga monitor. But i am able to write to vga monitor >>>> using the following commands from minicom: >>>> >>>> # echo "Hello" > /dev/tty1 >>>> # echo "Hi " > /dev/tty1 >>>> My requirement is to get on the vga monitor whatever i am typing on >>>> the minicom after logging into the linux like . >>>> ls or pwd commands. >>>> >>>> Anyone pl help me. >>>> >>>> Thanks & Regards >>>> Sudheer >>>> >>>> >>> See Documentation/kernel-parameters.txt. >>> >>> If be short, add: >>> >>> console=/dev/ttySxx console=/dev/tty1 >>> >>> (both) to a kernel parameters string. >>> >>> >> I got upto login prompt on the vga monitor only after giving the above >> parameters in my u-boot bootargs. >> u-boot=> set bootargs console=tty1 console=ttyS0,115200. >> >> >> I have added in the serial driver linux/drivers/serial/serial_core.c >> in the function uart_write(struct tty_struct *tty, const unsigned >> char * buf, int count) >> The lines in the if directive. >> >> if (c <= 0) >> break; >> memcpy(circ->buf + circ->head, buf, c); >> /* added to test vga */ >> #if 1 >> memcpy(tempbuf, circ->buf + circ->head, c); >> for(i=0;i> printk("%c", tempbuf[i]); >> #endif >> >> circ->head = (circ->head + c) & (UART_XMIT_SIZE - 1); >> buf += c; >> >> Then as i expected, all the letters i enter in the minicom came twice on >> the minicom. >> > > Because printk didn't print to an dedicated device, but to a klog > stream. So check your /etc/inittab and /etc/securetty, its similar > that something wrong in this files. > oh..sorry, i forgot to tell you about the other two modifications done in the kernel config and ramdisk. In the kernel config-- I have selected the virtual terminal option. In the ramdisk- etc/inittab - i added the following line: ::respawn:/sbin/getty tty1 115200 vt100. The etc/securetty contains the following: console fb0 tty1 tty2 tty3 tty4 tty5 tty6 tty7 tty8 ttyS0 ttyS1 ttyS2 ttyS3 ttyp0 ttyp1 ttyp2 ttyp3 ttyAM0 ttyAM1 tts/0 tts/1 Do i need to use fb0, to send the serial data to frame buffer ? > >> login:rroooott >> Password: Password: >> login on `ttyS0'ogin on `ttyS0'login[83]: root >> >> ~ # ~ # llss >> ~ # ~ # iiffccoonnffiigg >> >> And whatever i enter on the minicom also gets print on the vga monitor >> but only once. >> When i comment the if directive, On the vga monitor i could see only >> upto login prompt. >> >> I don't know why the printk statement i added in the serial driver >> prints on the vga monitor. >> >> As said by shkatikannan, i am going through the vga driver to copy to >> the frambuffer. But yet couldn't get it exactly in the code where to copy. >> >> Please tell me if i am in the wrong path. >> >> Thanks & Regards >> Sudheer >> >> --------------070902060505080600090709 Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Andrey Volkov wrote: 
sudheer wrote:
  
Andrey Volkov wrote:
    
urwithsudheer wrote:
      
Hello All,
I am working with a pci based vga card. I have connected the vga card
next to the  pci slot of my target processor on the baseboard.
I have connected a monitor to the vga card.
When i boot linux from minicom, i could see all the kernel log
messages on both the minicom and vga card monitor. But on the vga
monitor, i could not see any messages after asking for login as below:
.
.

Mounting filesystems
Running depmod
Setting up networking on loopback device:
Setting up networking on eth0:
eth0: PHY is Marvell 88E11x1 (1410cc2)
Adding static route for default gateway to 192.168.3.1:
Setting nameserver to 192.168.0.1 in /etc/resolv.conf:
Starting inetd:

login:


Though i am entering my login and passwd at the minicom, nothing
comes on to the vga monitor. But i am able to write to vga monitor
using the following commands from minicom:

# echo "Hello" > /dev/tty1
# echo "Hi " > /dev/tty1
My requirement is to get on the vga monitor whatever i am typing on
the minicom after logging into the linux like .
ls or pwd commands.

Anyone pl help me.

Thanks & Regards
Sudheer

        
See Documentation/kernel-parameters.txt.

If be short, add:

    console=/dev/ttySxx console=/dev/tty1

(both) to a kernel parameters string.

      
I got upto login prompt on the vga monitor only after giving the above
parameters in my u-boot bootargs.
u-boot=> set bootargs console=tty1 console=ttyS0,115200.


I have added in the serial driver  linux/drivers/serial/serial_core.c
   in the function  uart_write(struct tty_struct *tty, const unsigned
char * buf, int count)
   The lines in the if directive.
  
if (c <= 0)
                        break;
                memcpy(circ->buf + circ->head, buf, c);
/* added to test vga */
#if 1
                memcpy(tempbuf, circ->buf + circ->head, c);
                  for(i=0;i<c;i++)
                  printk("%c", tempbuf[i]);
#endif

 circ->head = (circ->head + c) & (UART_XMIT_SIZE - 1);
                buf += c;

Then as i expected, all the letters i enter in the minicom came twice on
the minicom.
    

Because printk didn't print to an dedicated device, but to a klog
stream. So check your /etc/inittab and /etc/securetty, its similar
that something wrong in this files.
oh..sorry, i forgot to tell you about the other two modifications done in the kernel config and ramdisk.
In the kernel config-- I have selected the virtual terminal option.
In the ramdisk- etc/inittab - i added the following line:
::respawn:/sbin/getty tty1 115200 vt100.
The etc/securetty contains the following:
console
fb0
tty1
tty2
tty3
tty4
tty5
tty6
tty7
tty8
ttyS0
ttyS1
ttyS2
ttyS3
ttyp0
ttyp1
ttyp2
ttyp3
ttyAM0
ttyAM1
tts/0
tts/1

Do i need to use fb0, to send the  serial data to frame buffer ?

  
login:rroooott
Password: Password:
login  on `ttyS0'ogin  on `ttyS0'login[83]: root

 ~ # ~ # llss
 ~ # ~ # iiffccoonnffiigg

And whatever i enter on the minicom also gets print on the vga monitor 
but only once.
When i comment the if directive, On the vga monitor i could see only
upto login prompt.

I don't know why the printk statement i added in the serial driver
prints on the vga monitor.

As said by shkatikannan, i am going through the vga driver to copy to
the frambuffer. But  yet couldn't get it exactly in the code where to copy.

Please tell me if i am in the wrong path.

Thanks & Regards
Sudheer

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