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GSCKBC(4) |
Kernel Interfaces Manual (HP700) |
GSCKBC(4) |
NAME
gsckbc — GSC PS/2 keyboard and mouse interface
SYNOPSIS
gsckbc* at gsc?
pckbd* at gsckbc?
pms* at gsckbc?
DESCRIPTION
The
gsckbc device is a machine dependent front end to the
pckbport(9) interface. It attaches to the GSC PS/2 keyboard and mouse interface found in LASI chips.
DIAGNOSTICS
-
gsckbc_attach: can't map I/O space
-
The driver was not able to map the device registers during attachment. The device will not be usable.
-
can't find master device
-
An error occurred during attachment of the keyboard port so the mouse port can't be attached too.
HISTORY
The gsckbc driver appeared in NetBSD 2.0.
AUTHORS
Jochen Kunz
BUGS
Actually the two PS/2 ports are a single device and share a single interrupt. The firmware lists them as individual devices in the firmware device tree. This illusion is kept to map the firmware device tree as close as possible to the kernel device tree. The first device is caled master, gets the interrupt and the other is the slave. Assumption: Master attaches first, gets the interrupt and has lower HPA. So it is important that the master device, usually the keyboard port, attaches first to make the slave, usually the mouse port, usable.