Re: Mounting Compact Flash card under Linux on ppc823

In message [ref] you wrote:

I am using the Linux kernel from www.denx.de that has the version 2.4.4
(2002-08-09) with all the support for the 8xx pcmcia/direct etc... code.
When Linux boots (using NFS remote filesystem) it comes up and prints the
following:

<misc deleted>
...
Kernel command line: root=/dev/nfs rw nfsroot=192.168.0.120:/ppcroot
nfsaddrs=19
2.168.0.20:192.168.0.120 init=/bin/bash idebus=25
ide_setup: idebus=25PCMCIA slot B: phys mem e0000000...ec000000 (size
0c000000)
Card ID: SST 48CF032 55LD017-A2 FW17-4C
 Fixed Disk Card
 IDE interface
 [silicon] [unique] [single] [sleep] [standby] [idle] [low power]
...
<more stuff deleted>
...

This "more stuff deleted" would have been the interesting  part;  the
kernel   will  tell  you  something  about  the  partition  table  it
recognizes, or at least the device. So if you are  sure  your  device
contains  a  valid partition table with at least one valid partition,
you should have seen something like:

	...
	hda: probing with STATUS(0x50) instead of ALTSTATUS(0x41)
	hda: CF 128MB, ATA DISK drive
	ide0 at 0xc7000320-0xc7000327,0xc3000106 on irq 13
	hda: 250368 sectors (128 MB) w/16KiB Cache, CHS=978/8/32
	Partition check:
	 hda: hda1

and finally gives me a shell prompt.  In the above, the Kernel seems to
recognize the card as being an SST-based flash card.  All seems okay but the
IDE device does not appear in the /proc/devices listing.  Also, I can't
mount a filesystem (probably because the IDE doesn't seem to have installed
completely).  The card I am using has a DOS filesystem on it with a few
files that I added.  My /etc/fstab has the following entry:

/dev/hda1       /mnt/flash      msdos   noauto,owner    0 0

Using make menuconfig, I set the following:
under IDE, ATA and ATAPI Block Devices:
   <*> Enhanced IDE/MFM/RLL disk/cdrom/tape/floppy support
   [*]   MPC8xx IDE support
   (8xx_PCCARD) Type of MPC8xx IDE interface
under File systems:
   <*>  DOS FAT fs support
   <*>    MSDOS fs support
   <*>      UMSDOS: Unix-like file system on top of standard MSDOS fs
   <*>    VFAT (Windows-95) fs support

Questions:
- should the device really be hda1 ?

Yes, most probably.

- is there something more that I forgot in my board config header file for
setting up pcmcia?

No, I don't think so.

My guess is that you forgot to enable any partition table support  in
your Linux kernel. Make sure your config file contains:


	CONFIG_IDE=y
	CONFIG_BLK_DEV_IDE=y
	CONFIG_BLK_DEV_IDEDISK=y
	CONFIG_IDEDISK_MULTI_MODE=y
	CONFIG_BLK_DEV_MPC8xx_IDE=y
	CONFIG_BLK_DEV_IDE_MODES=y
and
	CONFIG_PARTITION_ADVANCED=y
	CONFIG_MAC_PARTITION=y
	CONFIG_MSDOS_PARTITION=y
	CONFIG_NLS=y
	CONFIG_NLS_DEFAULT="y"
	CONFIG_NLS_ISO8859_1=y
	CONFIG_NLS_ISO8859_15=y

See  also  our   documentation   at   http://www.denx.de/re/DPLG.html
especially  section  "7.  Advanced Topics" (7.3.2. PC Card Support in
Linux).

Wolfgang Denk

--
Software Engineering:  Embedded and Realtime Systems,  Embedded Linux
Phone: (+49)-8142-4596-87  Fax: (+49)-8142-4596-88  Email: wd@denx.de
The following statement is not true.  The previous statement is true.

** Sent via the linuxppc-embedded mail list. See http://lists.linuxppc.org/