From mboxrd@z Thu Jan 1 00:00:00 1970 Message-Id: Date: Thu, 10 Dec 1998 11:00:27 +0100 (CET) From: "VALETTE Eric" To: alois_fertl@TalkNet.de CC: cort@persephone.cs.nmt.edu, linuxppc-dev@lists.linuxppc.org, mmporter@home.com In-reply-to: <366EEC05.E01F2088@talknet.de> (message from Alois Fertl on Wed, 09 Dec 1998 21:30:45 +0000) Subject: Re: PREP Hardware goes IDE again References: <366EEC05.E01F2088@talknet.de> Mime-Version: 1.0 (generated by tm-edit 7.106) Content-Type: text/plain; charset=US-ASCII Sender: owner-linuxppc-dev@lists.linuxppc.org List-Id: >>>>> "Alois" == Alois Fertl writes: Alois> Here are some small patches (ralative to 2.1.129) which make IDE Alois> working on PREP Hardware especially the RiscPC (probably also needed Alois> for MPC750). Unfortunately, nearly all the change you have proposed are either irrelevant for MCP750 or worse will cause it to not function. Alois> The first problem I had was related to interrups on the RiscPC. Alois> It always assigned IRQ13 to the IDE port. However actually the Alois> port is connected to IRQ14. The next problem was that prep_pci.c Alois> assigned IRQ14 to PCI. The Patch now assigns 14 to IDE and uses Alois> 9,11 and 15 for PCI. In addition to this it sets the edge/level Alois> control according to PCI preconfiguration. In addition it adds Alois> 3 more entries to the Blackhawk table. This is true only if you do not try to use the "full native PCI mode". In that case you should not look at IDE assigned value in the PCB but at the PCI interrupt line. This is what happens on MCP750 as the code automatically switch the driver to "full native PCI mode". Alois> The second problem was that the partition table of a DOS IDE drive Alois> was not recognized unless I specified hda=swapdata at the boot prompt. Alois> IDE CD-Rom drives were not recognized at all. All the required coding Alois> to operate IDE devices correctly is already there but it is not used Alois> for PREP hardware. I changed ide.h so that PREP is handled the same Alois> way as CHRP. This makes IDE disks and CD-roms work without the need Alois> to specify boot options. This breaks the MCP750. I tried the patch below, and was not detecting the disk correctly : everything was incorrectly swapped (including the name of the disk). My mcp750 system will run correctly *only* if this patch is not included... Alois> static __inline__ void ide_fix_driveid (struct hd_driveid *id) { Alois> - if (( _machine == _MACH_Pmac ) || (_machine == _MACH_chrp)|| (_machine == _MACH_mbx) ) { Alois> + if (( _machine == _MACH_Pmac ) || (_machine == _MACH_chrp)|| (_machine == _MACH_mbx) || (_machine == _MACH_prep) ) { Since you and mark are motorola felow I will ask you a favor as I did not find anything on the public docs. In the MCP750A/PG1 manual, page 4-5, I would like to know how to program PCB and more specifically the PIRQ control route. I do not find anything in the doc. -- eric [[ This message was sent via the linuxppc-dev mailing list. Replies are ]] [[ not forced back to the list, so be sure to Cc linuxppc-dev if your ]] [[ reply is of general interest. To unsubscribe from linuxppc-dev, send ]] [[ the message 'unsubscribe' to linuxppc-dev-request@lists.linuxppc.org ]]