Re: [linuxsh-dev] HD64461 & PCMCIA

[Greg B. <gb...@po...>]

Studencki Pawel wrote:
> 
> Hello,

Hi Pawel,


> I have some questions about "how do I get my PCMCIA devices working with
> SH7709" :), especially with HD64461 companion chip.

  I'm not familiar with the '61 but I have worked with its brother
the HD64465.

> 1) My hd64461 is connected to pin INT0 of SH7709, so I've chosen interrupt
> 0:
> (0) HD64461 IRQ.
> What other options do I have to modify? I mean, hardcoded options?
> For example in function setup_hd64461, value for INTC_ICR1 has been set. In
> this case (int 0) I have to set properly first 2 bits (mainly) of this
> register (how can I determine kind of interrupt, falling or rising edge, low
> level?)

  You need to get the User Manual for the HD64461 from Hitachi.
In the '65 Manual, it implies in Section 8 Interrupt Controller that
the IRQ0# from the '65 is level triggered, active low (which is what
you'd expect for direct connection to our 7750).


> 2)
> [*] HD64461 PCMCIA enabler
> What does this option mean? Is this enabling of HD64461? Do I need pcmcia
> driver?

  It's not a generic PCMCIA driver. It's a very simple hack which sets
up port mappings for one specific set of cards in one specific box
(an NE2000 network card and a CompactFlash memory card in an HP690).
This is probably not what you want.

  If you want to be able to plug in various different types of cards,
you need a proper PCMCIA Socket Services driver.  AFAIK there isn't one
for the 7709/64461 combination, but you might want to have a look at
Jesper Skov's driver for the 7707, available at

http://sourceforge.net/patch/?func=detailpatch&patch_id=101171&group_id=2682

or my driver for the 7750/64465, which is drivers/pcmcia/hd64465_ss.c
in 2.4.0-ac3.  In either case you will need to modify the driver.


> 3)
> <*> Enhanced IDE/MFM/RLL disk/cdrom/tape/floppy support
> and other options...
> Should I compile this as a module? I thougth, I have to compile first the
> pcmcia driver as module and install it with insmod. Only after that I can
> use any pcmcia devices: card flashes or network adaptars. Does it look like:
> 
>         kernel
> ----------------------------
>         hd64461
> ----------------------------
>         pcmcia
> ---------------------------
> Flash | network | ...
> 
> I would be grateful for any tips and explanations of these problems (what
> hardware aspects are exceptionally important? )

  For our PCMCIA support, we have the following compiled as modules:

drivers/ide/ide-cs.o
drivers/ide/ide-disk.o
drivers/ide/ide-mod.o
drivers/ide/ide-probe-mod.o
drivers/net/8390.o
drivers/net/airo.o
drivers/net/ne.o
drivers/net/pcmcia/airo_cs.o
drivers/net/pcmcia/pcnet_cs.o
drivers/net/stnic.o
drivers/pcmcia/ds.o
drivers/pcmcia/hd64465_ss.o
drivers/pcmcia/pcmcia_core.o

  The first 4 are necessary to mount flash cards as IDE disks.  The last
3 are various PCMCIA drivers.  The stuff in the middle is for supporting
network cards.

  For IDE flash cards, you will probably want to choose:

m   Enhanced IDE/MFM/RLL disk/cdrom/tape/floppy support
m     Include IDE/ATA-2 DISK support
m       PCMCIA IDE support

  In theory, all this stuff can be built into the kernel, but we've
always used modules.

Greg.
-- 
These are my opinions not PPIs.