Re: New serial card development

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



> Hello, the next question that I have is how to handle the interrupts
> on this UART.  It has a more complex interrupt scheme than a
> traditional 8250 UART.  There is a global ISR register that tells you
> which port had the interrupt and then there is another set of
> registers that hold the actual interrupts.

port->handle_irq is half of what you need, but you probably need to be
able to hook serial8250_interruot and provide your own alternative. Given
you don't need the irq chain handling either probably the bit that wants
to be hookable is the calls to serial_link_irq_chain and
serial_unlink_irq_chain in the startup/shutdown methods.

In yor case all that and all the irq scanning the chain becomes a simple
read of the port and call of the handlers (serial8250_handlee_irq(port,
iir)



Alan
--
To unsubscribe from this list: send the line "unsubscribe linux-serial" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html


[Index of Archives]     [Kernel Newbies]     [Security]     [Netfilter]     [Bugtraq]     [Linux PPP]     [Linux FS]     [Yosemite News]     [MIPS Linux]     [ARM Linux]     [Linux Security]     [Linux RAID]     [Samba]     [Video 4 Linux]     [Linmodem]     [Device Mapper]     [Linux Kernel for ARM]

  Powered by Linux