Compact Flash - lost interrupt

[Muruga Ganapathy]

The error message might be due to the wrong/improper configuration of 
interrupt and its attributes like whether it is level/edge sensitive.

G.Muruganandam

> Hello,
> 
> I'm bringing up the Compact Flash interface on a custom board and am
> almost there, but not quite.  I've seen many messages in the past 
about
> the 'lost interrupt' message, but I couldn't find anything 
corresponding
> closely to my situation.  Can anyone shed some light?
> 
> Here's a snippet of Linux booting:
> 
> *******************************
> ## Booting image at 00200000 ...
>    Image Name:   Linux-2.6.17
>    Created:      2006-11-29  19:38:51 UTC
>    Image Type:   PowerPC Linux Kernel Image (gzip compressed)
>    Data Size:    1103335 Bytes =  1.1 MB
>    Load Address: 00000000
>    Entry Point:  00000000
>    Verifying Checksum ... OK
>    Uncompressing Kernel Image ... OK
> Using MPC834x SYS machine description
> 
> <snip>
> 
> Uniform Multi-Platform E-IDE driver Revision: 7.00alpha2
> ide: Assuming 50MHz system bus speed for PIO modes; override with
> idebus=xx
> hda: TOSHIBA THNCF512MDG, ATA DISK drive
> ide0 at 0xd1064000-0xd1064007,0xd106600d on irq 20
> hda: max request size: 128KiB
> hda: 1000944 sectors (512 MB) w/2KiB Cache, CHS=993/16/63
>  hda:<4>hda: lost interrupt
> hda: lost interrupt
> hda: lost interrupt
> hda: lost interrupt
> hda: lost interrupt
>  hda1
> 
> <snip>
> 
> prism login:
> 
> *******************************
> 
> As you can see, the device is found and eventually the IDE driver
> assigns it ID hda1, but something's amiss.
> 
> When I try to partition the drive I get the same thing:
> 
> ~ # fdisk /dev/hda
> hda: lost interrupt
> hda: lost interrupt
> 
> Command (m for help): p
> 
> Disk /dev/hda: 512 MB, 512483328 bytes
> 16 heads, 63 sectors/track, 993 cylinders
> Units = cylinders of 1008 * 512 = 516096 bytes
> 
>    Device Boot    Start       End    Blocks   Id  System
> /dev/hda1   *           1         992      499936+   6  FAT16
> 
> 
> The Compact Flash is configured in 'True IDE' mode on the local bus 
of a
> 400MHz MPC8349 processor.  I've set the UPM timing according to the
> Toshiba app note that's floating around, and the interrupt is tied to
> IRQ4 (Interrupt #20).  The fact that the driver probe can read
> information about the drive tells me that the memory bus is at least
> marginally functional.  Interrupts are firing:
> 
> ~ # cat /proc/interrupts
>            CPU0
>   9:        127   IPIC   Level     serial
>  14:          0   IPIC   Level     i2c-mpc
>  15:          0   IPIC   Level     i2c-mpc
>  16:          0   IPIC   Level     mpc83xx_spi
>  20:         12   IPIC   Edge      ide0
>  21:        547   IPIC   Edge      eth2
> BAD:          0
> 
> I'm using a driver supplied by Kumar Gala called 'cfide.c'.  I've 
tried
> a couple of quite different CF cards, with the same result on both.
> 
> Here's a portion of the kernel .config file:
> 
> #
> # ATA/ATAPI/MFM/RLL support
> #
> CONFIG_IDE=y
> CONFIG_BLK_DEV_IDE=y
> 
> #
> # Please see Documentation/ide.txt for help/info on IDE drives
> #
> # CONFIG_BLK_DEV_IDE_SATA is not set
> CONFIG_BLK_DEV_IDEDISK=y
> # CONFIG_IDEDISK_MULTI_MODE is not set
> # CONFIG_BLK_DEV_IDECD is not set
> # CONFIG_BLK_DEV_IDETAPE is not set
> # CONFIG_BLK_DEV_IDEFLOPPY is not set
> # CONFIG_IDE_TASK_IOCTL is not set
> 
> #
> # IDE chipset support/bugfixes
> #
> CONFIG_IDE_GENERIC=y
> # CONFIG_IDE_ARM is not set
> CONFIG_BLK_DEV_CFIDE=y
> # CONFIG_BLK_DEV_IDEDMA is not set
> # CONFIG_IDEDMA_AUTO is not set
> # CONFIG_BLK_DEV_HD is not set
> 
> 
> thanks,
> Ben
> 
> _______________________________________________
> Linuxppc-embedded mailing list
> Linuxppc-embedded at ozlabs.org
> https://ozlabs.org/mailman/listinfo/linuxppc-embedded
> 
> 

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