From mboxrd@z Thu Jan 1 00:00:00 1970 Message-ID: <3B460601.6A3AA7D9@acm.org> Date: Fri, 06 Jul 2001 11:40:01 -0700 From: Ira Weiny MIME-Version: 1.0 To: linuxppc-dev Subject: IBM Microdrive PCCard on TiBook (ide-cs module) Content-Type: text/plain; charset=us-ascii Sender: owner-linuxppc-dev@lists.linuxppc.org List-Id: I have spent a little more time tracking down why the PCCard adapter for my Microdrive causes the TiBook to shutdown. But I need some help in interpreting the information I have found. 1) I was able to catch with xmon a stack trace before it shutdown. This showed a stack trace as follows: ide-cs.c:ide_config ide.c:ide_register ide.c:ide_register_hw ide.c:ide_probe_module ide-probe.c:ideprobe_init ide-probe.c:probe_hwif ide-probe.c:do_probe ide-probe.c:try_to_identify ide-probe.c:actual_try_to_identify <== shutdown somewhere here?? 2) I am assuming at this point it is writing to registers which are mapped incorrectly (probably to the PMU) which cause it to shutdown. 3) I have found that the io_base addresses is 0x1000 (as set in my config.opts file) and this is what is passed to the ide_register function. Changing this address does not seem to change it's behavior though. (??) 4) ide_register calls ide_init_hwif_ports with these addresses which have a "pmac_" specific call. So I am assuming that it would "ioremap" these as appropriate. (However, I don't see it modifying this address at all?) 5) ide_register_hw calls "ide_probe_module" which takes me into the ide-probe.c file. But I see a specific "pmac_ide_probe" which is called at init time. My conclusion is that I should either be calling this pmac_ide_probe rather than the generic ide_probe module (and making it _not_ an init function). OR I need to modify the ide_probe module to handle the proper maping of the addresses such that I don't write to the PMU. Unfortunatly I have not found any examples of the later in the pcmcia drivers I have looked at so I am worried that I am totally off base. If I am "barking up the wrong tree" I hope someone can tell me such that I can start looking elsewhere. Thanks in advance, Ira Weiny iweiny@acm.org ** Sent via the linuxppc-dev mail list. See http://lists.linuxppc.org/