Messages in this thread | | | Date | Wed, 27 Oct 2010 16:04:13 -0500 | From | Timur Tabi <> | Subject | Writing a console/tty driver -- how to use tty_port? |
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Greg,
Do you have an updated version of Tiny TTY that uses tty_port structures? I'm trying to write a new TTY driver for a device that is not a UART, and I'm having a hard time finding a good example. I suspect I need to understand the tty_port structure, but I can't find any documentation for it.
One specific problem I'm having is that I can't figure out how to get a tty_struct pointer in my interrupt handler. The ISR gets called whenever there is new input, and it needs to call tty_insert_flip_string(). But it appears that it's possible to have my driver opened multiple times, each time creating a new TTY. But since I can only have one interrupt handler, I don't know how to determine which of the tty_structs to use. I figure tty_port is a way to resolve this problem, but I don't know how to use it exactly.
-- Timur Tabi Linux kernel developer at Freescale
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