Re: Linux tty driver question

From: Jiri Slaby
Date: Sat Feb 17 2007 - 06:01:51 EST


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

Hnus <hnus@xxxxxxxxxx> is an alias for /dev/null
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/