Chapter 14 ISA device drivers

Table of Contents
14.1 Synopsis
14.2 Basic information
14.3 Device_t pointer
14.4 Configuration file and the order of identifying and probing during auto-configuration
14.5 Resources
14.6 Bus memory mapping
14.7 DMA
14.8 xxx_isa_probe
14.9 xxx_isa_attach
14.10 xxx_isa_detach
14.11 xxx_isa_shutdown
14.12 xxx_intr

This chapter was written by Sergey Babkin <babkin@FreeBSD.org> Modifications for the handbook made by Murray Stokely <murray@FreeBSD.org>, Wylie Stilwell <wylie@magnesium.net>, and Valentino Vaschetto <logo@FreeBSD.org>.

14.1 Synopsis

This chapter introduces the issues relevant to writing a driver for an ISA device. The pseudo-code presented here is rather detailed and reminiscent of the real code but is still only pseudo-code. It avoids the details irrelevant to the subject of the discussion. The real-life examples can be found in the source code of real drivers. In particular the drivers ep and aha are good sources of information.