Date: Wed, 25 Jul 2001 08:54:53 -0400 (EDT) From: Kenneth Wayne Culver <culverk@wam.umd.edu> To: freebsd-current@freebsd.org Subject: driver writing newbie Message-ID: <Pine.GSO.4.21.0107250844510.10112-100000@rac2.wam.umd.edu>
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Sorry to post to this forum, but I'm not getting any replies from -hackers or -questions, and I've looked at the webpages on writing device drivers, as well as several other drivers. Here's my problem/question/whatever... I am writing a driver right now for the Hardware monitoring features of the via686a and via686b south bridge chips. I have documentation and have looked at the linux driver to see how things are done. My problem is that I've got the chip probing, and I have the pci_read_config telling me that my device needs a memory port (what's wierd is that I had to use the base register value of the chip instead of PCIR_COMMAND in pci_read_config to get it to tell me that it wanted me to set up a port instead of mem which is 0x70) So I set up the regid as 0x10 (PCIR_MAPS) as outlined in the webpage, and SYS_RES_IOPORT as I found in the pci driver for the es137x sound chip. I've also tried several combinations. So far the only thing I havn't tried is setting the regid to 0x10 (PCIR_MAPS) and using SYS_RES_MEMORY instead of SYS_RES_IOPORT (all these combinations are for use in bus_alloc_resource). The thing is everything I've tried fails to work, so I can't attach my driver because it won't map the resources. Can anyone suggest other things I could try to make this work right? Ken To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the message
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