Heads-up: USB serial console support on x86
Date: Tue, 24 Mar 2009 16:39:58 +0800
From: Zhigang Lu <Zhigang.Lu at sun dot com>
To: onnv-gate at onnv dot eng dot sun dot com, on-all at eng dot sun dot com
Subject: Heads-up: USB serial console support on x86
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<pre>With the putback for
6817700 EHCI/OHCI need support polled I/O for usbserial console
you may redirect Solaris x86 console to a USB serial device on all
three USB host controllers(useful for machine without built-in serial
connector).
To enable it, run
# eeprom console=usb-serial
and reboot. Or, edit the GRUB menu to have
kernel ... -B console=usb-serial
Here are a few things to know with usb serial console.
- Runtime kmdb (mdb -K) is available, but boottime kmdb isn't.
- kmdb depends on polled I/O, which works for usbsprl.
Support for other usbser devices will come later.
Comments and suggestions are welcome.
-Zhigang</pre>
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on 2009/11/20 23:48