Re: IDE driver support in PPC440

["Ralph Blach" <rblach@intrex.net>]

I am using the MontaVista 2.1 port and the Promise IDE works perfectly.  I just plugged it in and it just ran.

Chip

---------- Original Message ----------------------------------
From: Xupei Liang <tliang@yahoo.com>
Date:  Wed, 14 May 2003 08:20:11 -0700 (PDT)

>
>Hi, Eugene,
>
>The IRQ7 is setup as level trigger and active low.
>
>I think what happened is that when the ISR is
>serving the first interrupt, which is external
>interrupt 7 (number 50), it is interrupted again.
>This time, ppc405_pic_get_irq() returns irq 64 because
>the routine knows that all interrupts have been
>disabled (I have looked at UIC_ER0 and UIC_ER1
>and verified that is the case). So the question is,
>if all interrupts are disabled, why the code is stuck
>inside the ISR?
>
>I am using the lastest 2.4.19 code.
>
>Thank you for your help again.
>
>Regards,
>
>Terry L.
>
>
>--- Eugene Surovegin <ebs@ebshome.net> wrote:
>>
>> At 10:15 PM 5/13/2003, Xupei Liang wrote:
>>
>>
>> >I am working on a PPC440 board that supports
>> >a PCI-IDE device, and I am experiencing an
>> >interrupt handling problem.
>> >
>> >The PCI-IDE controller uses External Interrupt 7
>> and
>> >the controller interrupt line is wired to the
>> >processor directly. When the IDE device is
>> >being initialized, I can see that the interrupt
>> >goes off. But the code is stuck in the
>> >ISR and can not get out. Here are the screen
>> >debug messages:
>> >
>> ><Linux booting up>
>> >ide1: CMD649 Bus-Master DMA disabled (BIOS)
>> >disabling irq 50 defensively
>> >ppc405_uic_disable - irq 50 word 1 bit 0x12
>> >hda: SanDisk SDCFB-128, ATA DISK drive
>> >ppc405_uic_enable - irq 50 word 1 bit 0x12
>> >ppc405_uic_enable - irq 50 word 1 bit 0x12
>> >ide0 at 0x2000-0x2007,0x3002 on irq 50
>> >hda: 250880 sectors (128 MB) w/1KiB Cache,
>> >CHS=980/8/32
>> >Partition check:
>> >  hda:ppc405_pic_get_irq - irq 50 bit 0x2000
>> >ppc405_uic_disable_and_ack - irq 50 word 1 bit 0x12
>> >ppc405_pic_get_irq - irq 64 bit 0x0
>> >ppc405_pic_get_irq - irq 64 bit 0x0
>> >-------------
>>
>> Well, "irq 64" bothers me.
>> You shouldn't see this message. Real external
>> interrupts are in the range 0-63
>>
>> Please, check that you are using latest code from
>> 2.4 devel tree
>> (in particular file arch/ppc/kernel/ppc4xx_pic.c)
>>
>> BTW, how did you setup trigger and polarity settings
>> for IRQ7 ?
>>
>> Eugene.
>>
>>
>>
>
>
>
>

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