I think I isolated the problem: in ide-cs.c, ide_config() is calling pcmcia_request_irq(), and this function happens to set irq=35. This irq was not rejected later in ide_probe.c, hwif_init(): ide0: Disabled unable to get IRQ 35 I noticed that the old kernel 2.4.26 used irq=40 here. So I tried to force pcmcia_request_irq() to set irq=40, like follows: --- linux-2.6.20.7-orig/drivers/pcmcia/pcmcia_resource.c 2007-04-15 21:08:02.000000000 +0200 +++ linux-2.6.20.7/drivers/pcmcia/pcmcia_resource.c 2007-04-27 09:20:41.000000000 +0200 @@ -867,6 +867,7 @@ printk(KERN_WARNING "pcmcia: request for exclusive IRQ could not be fulfilled.\n"); printk(KERN_WARNING "pcmcia: the driver needs updating to supported shared IRQ lines.\n"); } + irq = 40; c->irq.Attributes = req->Attributes; s->irq.AssignedIRQ = req->AssignedIRQ = irq; s->irq.Config++; and this happens to work: ide_config() succeeds, and finally I can mount the CF and use it. Other values for irq (i tried 39, 41) won't work either. Which would be the correct way to make pcmcia_request_irq() use the correct value of 40? Fabrice > -----Original Message----- > From: Andrew Morton [mailto:akpm@xxxxxxxxxxxxxxxxxxxx] > Sent: Donnerstag, 26. April 2007 04:08 > To: Aeschbacher, Fabrice > Cc: lkml; linux-mips@xxxxxxxxxxxxxx > Subject: Re: pcmcia - failed to initialize IDE interface > > On Wed, 25 Apr 2007 15:27:26 +0200 "Aeschbacher, Fabrice" > <Fabrice.Aeschbacher@xxxxxxxxxxx> wrote: > > > Hi, > > > > [kernel 2.6.20.7, arch=mips, processor=amd au1550] > > > > I'm trying to install a 2.6 kernel on an Alchemy au1550, and having > > problem with the pcmcia socket, where I plugged a > CompactFlash card. > > The card seems to be recognized by the kernel, appears in > > /sys/bus/pcmcia/devices, but not in /proc/bus/pccard, and I can't > > access the device (/dev/hda). > > > > The relevant console messages: > > ---------------------------------------------------------------- > > pccard: PCMCIA card inserted into slot 0 > > pcmcia: registering new device pcmcia0.0 > > hda: SanDisk SDCFB-64, CFA DISK drive > > ide0: Disabled unable to get IRQ 35. > > ide0: failed to initialize IDE interface > > ide0: I/O resource 0x10200E-0x10200E not free. > > ide0: ports already in use, skipping probe > > ide0: I/O resource 0x10200E-0x10200E not free. > > ide0: ports already in use, skipping probe > > ide0: I/O resource 0x10200E-0x10200E not free. > > ide0: ports already in use, skipping probe > > ide0: I/O resource 0x10200E-0x10200E not free. > > ide0: ports already in use, skipping probe > > ide0: I/O resource 0x10200E-0x10200E not free. > > ide0: ports already in use, skipping probe > > ide0: I/O resource 0x10200E-0x10200E not free. > > ide0: ports already in use, skipping probe > > ide0: I/O resource 0x10200E-0x10200E not free. > > ide0: ports already in use, skipping probe > > ide0: I/O resource 0x10200E-0x10200E not free. > > ide0: ports already in use, skipping probe > > ide0: I/O resource 0x10200E-0x10200E not free. > > ide0: ports already in use, skipping probe > > ide-cs: ide_register() at 0x102000 & 0x10200e, irq 35 failed > > ---------------------------------------------------------------- > > > > Here is the relevant part of the kernel config: > > CONFIG_IDE=y > > CONFIG_IDE_GENERIC=y > > CONFIG_BLK_DEV_IDE=y > > CONFIG_BLK_DEV_IDECS=y > > CONFIG_PCCARD=y > > CONFIG_PCMCIA_DEBUG=y > > CONFIG_PCMCIA=y > > CONFIG_PCMCIA_AU1X00=y > > > > (cc'ed linux-mips) > > Perhaps /proc/ioports will tell us where the conflict lies. > > The output of `dmesg -s 1000000' might also be needed. >
