Re: Linux tty driver question

[Jiri Slaby]

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,
--
http://www.fi.muni.cz/~xslaby/            Jiri Slaby
faculty of informatics, masaryk university, brno, cz
e-mail: jirislaby gmail com, gpg pubkey fingerprint:
B674 9967 0407 CE62 ACC8  22A0 32CC 55C3 39D4 7A7E

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