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- ==================
- SA1100 serial port
- ==================
- The SA1100 serial port had its major/minor numbers officially assigned::
- > Date: Sun, 24 Sep 2000 21:40:27 -0700
- > From: H. Peter Anvin <hpa@transmeta.com>
- > To: Nicolas Pitre <nico@CAM.ORG>
- > Cc: Device List Maintainer <device@lanana.org>
- > Subject: Re: device
- >
- > Okay. Note that device numbers 204 and 205 are used for "low density
- > serial devices", so you will have a range of minors on those majors (the
- > tty device layer handles this just fine, so you don't have to worry about
- > doing anything special.)
- >
- > So your assignments are:
- >
- > 204 char Low-density serial ports
- > 5 = /dev/ttySA0 SA1100 builtin serial port 0
- > 6 = /dev/ttySA1 SA1100 builtin serial port 1
- > 7 = /dev/ttySA2 SA1100 builtin serial port 2
- >
- > 205 char Low-density serial ports (alternate device)
- > 5 = /dev/cusa0 Callout device for ttySA0
- > 6 = /dev/cusa1 Callout device for ttySA1
- > 7 = /dev/cusa2 Callout device for ttySA2
- >
- You must create those inodes in /dev on the root filesystem used
- by your SA1100-based device::
- mknod ttySA0 c 204 5
- mknod ttySA1 c 204 6
- mknod ttySA2 c 204 7
- mknod cusa0 c 205 5
- mknod cusa1 c 205 6
- mknod cusa2 c 205 7
- In addition to the creation of the appropriate device nodes above, you
- must ensure your user space applications make use of the correct device
- name. The classic example is the content of the /etc/inittab file where
- you might have a getty process started on ttyS0.
- In this case:
- - replace occurrences of ttyS0 with ttySA0, ttyS1 with ttySA1, etc.
- - don't forget to add 'ttySA0', 'console', or the appropriate tty name
- in /etc/securetty for root to be allowed to login as well.
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