Date: Sat, 17 Feb 2007 14:27:51 +0300 (MSK)
From: "Mockern" <Mockern@yandex.ru>
Message-Id: <45D6E6B7.000003.09194@mfront8.yandex.ru>
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To: jirislaby@gmail.com
Cc: linux-kernel@vger.kernel.org
Subject: Re: Linux tty driver question
In-Reply-To: <45D6E094.8030006@gmail.com>
Reply-To: Mockern@yandex.ru
References: <45D6D3A3.000001.04520@tide.yandex.ru> <45D6E094.8030006@gmail.com>
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Thank you, 

I have no problem with my tty driver, except one thing: it does not work with cat (but there are no problems to write,read from user space application). I'll try to follow your adwise to support cat. 


>Mockern napsal(a):
>> Hi,
>> 
>> I'm working on Linux tty driver (based on tiny_tty).
>> 
>> How can I provide in my driver Linux cat operation (e.g.cat < ttyS3)?
>
>call tty_insert_flip_*() from somewhere to put some data into tty recieve 
>buffer, which is pushed into ldisc by tty_flip_buffer_push() and then sent by 
>tty_read function (where ldisc read is called) to userspace for reading process.
>
>> What should I implement exactly?
>
>open, settermios, write_room (note that this is minimal and will probably oops 
>when poll or write is invoked) + some isr or timer to fill the buffer mentioned 
>above.
>
>regards,

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