The current 85xxCDS restart code fails to reset the PCI bus which can
lead to odd behavior after the restart. This patch uses the VIA Super
Southbridge to perform a PCI reset which will reset the entire system.
NOTE: Since the VIA chip is behind a PCI-to-PCI bridge which can be
disabled with a switch setting, it may not be possible to perform the
PCI bus reset. In this case, the code defaults to the previous restart
mechanism.
Signed-off-by: NRandy Vinson <rvinson@mvista.com>
Signed-off-by: NKumar Gala <galak@kernel.crashing.org>

The Freescale MPC8555CDS and MPC8548CDS reference hardware has a legacy
8259 interrupt controller pair contained within a VIA VT82C686B Southbridge
on the main carrier board. The processor complex plugs into the carrier
card using a PCI slot which limits the available interrupts to the
INTA-INTD PCI interrupts. The output of the 8259 cascade pair is routed
through a gate array and connected to the PCI INTA interrupt line.
The normal interrupt chaining hook (set_irq_chained_handler) does
not allow sharing of the chained interrupt which prevents the
use of PCI INTA by PCI devices. This patch allows the 8259 cascade
pair to share their interrupt line with PCI devices.

NOTE: The addition of the .end routine for the MPIC is not strictly
necessary for this patch. It's there so this code will run from within
the threaded interrupt context used by the Real Time patch.
Signed-off-by: NRandy Vinson <rvinson@mvista.com>
Signed-off-by: NKumar Gala <galak@kernel.crashing.org>

The newer Arcadia boards for CDS have an FPGA that shows up on PCI
however isn't a real PCI device.  Add a quirk to just ignore the
FPGA.

This is based on the following patch from Andy & York:

http://ozlabs.org/pipermail/linuxppc-dev/2007-February/032042.htmlSigned-off-by: NKumar Gala <galak@kernel.crashing.org>

On the 85xx/86xx PCIe controllers if there is no device connected to the
PHB we will still allocate a pci_bus for downstream bus of the virtual
P2P bridge. However the resources allocated to the downstream bus are not
correct and so we just mimic the resources from the upstream pci_bus.
Signed-off-by: NKumar Gala <galak@kernel.crashing.org>

Switch the 85xx platform over to using the FSL generic PCI code.  This
gets ups PCIe support in addition to base PCI support.
Signed-off-by: NRoy Zang <tie-fei.zang@freescale.com>
Signed-off-by: NKumar Gala <galak@kernel.crashing.org>

Remove redundant pci_read_irq_line() function for 85xx CDS board.
This function has been realized in common ppc pci code.
Signed-off-by: NRoy Zang <tie-fei.zang@freescale.com>
Acked-by: NAndy Fleming <afleming@freescale.com>
Acked-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: NKumar Gala <galak@kernel.crashing.org>

Make the interrupt numbers match the OpenPIC spec intead of the
Freescale docs which distinguish between internal and external interrupts.

Now we can use the interrupt number directly to find the register offset
associated with it.
Signed-off-by: NKumar Gala <galak@kernel.crashing.org>

Now that we have the pci_controller in the exclude function we can easy
figure out if the bus number is the PHB or not.  The old style of using a
variable setup at init time was actually broken and would only work in
specific cases.
Signed-off-by: NKumar Gala <galak@kernel.crashing.org>

There are times that we need to know which controller we are on to decide
how to exclude devices properly.  We now pass the pci_controller that we
are going to use down to the pci_exclude_device function. This will
greatly simplify being able to exclude the PHBs in multiple controller
setups.
Signed-off-by: NKumar Gala <galak@kernel.crashing.org>

When CONFIG_PCI is disabled, the definitions for isa_io_base,
isa_mem_base and pci_dram_offset are entirely unused, but they
can result in link failure because they are defined in multiple
places.

The easiest fix is to just remove all these definitions.
Signed-off-by: NArnd Bergmann <arnd@arndb.de>

Many platforms currently define their own add_bridge function, some
of them globally. This breaks some multiplatform configurations.
Prefixing each of these functions with the platform name avoids
this problem.
Signed-off-by: NArnd Bergmann <arnd@arndb.de>

for consistency with other Open Firmware interfaces (and Sparc).

This is just a straight replacement.

This leaves the compatibility define in place.
Signed-off-by: NStephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: NPaul Mackerras <paulus@samba.org>

Signed-off-by: NStephen Rothwell <sfr@canb.auug.org.au>
Acked-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: NPaul Mackerras <paulus@samba.org>

Cleaned up the probing functionality to be more consistent across all 85xx
boards and actually check to see if we should be running on a given board.
Signed-off-by: NKumar Gala <galak@kernel.crashing.org>

Signed-off-by: NJon Loeliger <jdl@freescale.com>
Signed-off-by: NKumar Gala <galak@kernel.crashing.org>

Marked a number of functions in 85xx board code as static.  Also, some minor
whitespace cleanup
Signed-off-by: NKumar Gala <galak@kernel.crashing.org>

Remove struct pt_regs * from all handlers.
Also remove the regs argument from get_irq() functions.
Compile tested with arch/powerpc/config/* and
arch/ppc/configs/prep_defconfig
Signed-off-by: NOlaf Hering <olaf@aepfle.de>
Signed-off-by: NPaul Mackerras <paulus@samba.org>

Fix up some of the buildbreaks from the irq handler changes.
Signed-off-by: NOlof Johansson <olof@lixom.net>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

kbuild explicitly includes this at build time.
Signed-off-by: NDave Jones <davej@redhat.com>

* Fix IRQ support in the 85xx CDS boards so it uses the new
  generic stuff
* Fix PCI IRQ mapping to use the device tree
* Disabled i8259 support to allow the CDS to boot.  This will be
  fixed soon, but the current code doesn't even compile, so this
  is a vast improvement
Signed-off-by: NAndy Fleming <afleming@freescale.com>
Signed-off-by: NPaul Mackerras <paulus@samba.org>

Now that get_property() returns a void *, there's no need to cast its
return value. Also, treat the return value as const, so we can
constify get_property later.

mpc* platform changes.
Signed-off-by: NJeremy Kerr <jk@ozlabs.org>
Signed-off-by: NPaul Mackerras <paulus@samba.org>

This patch adds support for 85xx CDS support to arch/powerpc
Signed-off-by: NAndy Fleming <afleming@freescale.com>
Signed-off-by: NKumar Gala <galak@kernel.crashing.org>