From owner-freebsd-current Mon Aug 23 23:31:59 1999 Delivered-To: freebsd-current@freebsd.org Received: from gilliam.users.flyingcroc.net (gilliam.users.flyingcroc.net [207.246.128.2]) by hub.freebsd.org (Postfix) with ESMTP id 725EA15946 for ; Mon, 23 Aug 1999 23:29:14 -0700 (PDT) (envelope-from ross@gilliam.users.flyingcroc.net) Received: (from ross@localhost) by gilliam.users.flyingcroc.net (8.9.3/8.9.3) id XAA04853; Mon, 23 Aug 1999 23:28:29 -0700 (PDT) Date: Wed, 18 Aug 1999 12:58:34 -0700 (PDT) Message-Id: <199908240628.XAA04853@gilliam.users.flyingcroc.net> Subject: Re: [re]writable cdrom drive To: hasty@rah.star-gate.com (Amancio Hasty) Cc: dillon@apollo.backplane.com, wilko@yedi.iaf.nl, current@FreeBSD.ORG From: "Kenneth D. Merry" Sender: owner-freebsd-current@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG Amancio Hasty wrote... > > There is a generic SCSI bus enumerator API, and one for PCI as well. There > > isn't a generic API to get trees of devices of any type in the system, > > though. With new-bus that might be possible, but having done two > > enumerator APIs already (I wrote the CAM and PCI enumerator code), I can > > predict that it might be very complicated to do properly. (Things get > > really hairy when you have to keep the device tree from changing while > > you're traversing it.) > > > > In any case, for the two applications you specified, cdrecord is only > > interested in SCSI devices, and there is already an API -- that cdrecord > > already supports -- to do bus/device enumeration. The cdrecord -scanbus > > code already uses that API. > > > > Similarly, there is already a PCI device listing interface, so fxtv should > > be able to easily pull out the devices it is interested in. All it has to > > do is search for all "meteor" or "bktr" devices to find what it wants. > > > > Ken > > Now how can I map a device name from this bus enumeration so that I can issue > an "open" to the device: > > pciconf -l > chip0@pci0:0:0: class=0x060000 card=0x00000000 chip=0x12378086 rev=0x02 > hdr=0x00 > isab0@pci0:1:0: class=0x060100 card=0x00000000 chip=0x70008086 rev=0x01 > hdr=0x00 > ide_pci0@pci0:1:1: class=0x010180 card=0x00000000 chip=0x70108086 > rev=0x00 hdr=0x00 > chip1@pci0:1:2: class=0x0c0300 card=0x00000000 chip=0x70208086 rev=0x01 > hdr=0x00 > de0@pci0:9:0: class=0x020000 card=0x11001385 chip=0x00091011 rev=0x22 > hdr=0x00 > bktr0@pci0:10:0: class=0x040000 card=0x13eb0070 chip=0x036e109e > rev=0x02 hdr=0x00 > none0@pci0:10:1: class=0x048000 card=0x13eb0070 chip=0x0878109e > rev=0x02 hdr=0x00 > ahc0@pci0:11:0: class=0x010000 card=0x00000000 chip=0x81789004 rev=0x00 > hdr=0x00 > ahc1@pci0:12:0: class=0x010000 card=0x00000000 chip=0x71789004 rev=0x03 > hdr=0x00 > vga-pci0@pci0:13:0: class=0x030000 card=0x00000000 chip=0x0519102b > rev=0x01 hdr=0x00 Only one of the above devices actually has a character device interface in /dev. All you have to do is something like this: sprintf(foo, "/dev/%s%d", p->pd_name, p->pd_unit); The only way it would become complicated is if the device name in the kernel were different than the device name in /dev. Ken -- Kenneth Merry ken@kdm.org To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the message To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the message