Question about AT commands and how they are issued through the kernel

Andy Green andy at openmoko.com
Thu Dec 18 10:33:20 CET 2008


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Somebody in the thread at some point said:

| Are all serial devices controlled by the driver s3c2410.c?  I am trying
| to understand where a command goes when it is sent from user space to
| kernel space and then to the hardware itself.  Thank you.

Yes there's several miles of twisty intestines in the kernel to do with
it being a tty interface, but that's where it ends up getting fed into
the registers of the CPU UART and interrupts getting handled and so on.

- -Andy
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