All users of ->mmio == 1 are gone so convert ->mmio into flag.

Noticed by Alan Cox.

v2:
* updated for scc_pata
Signed-off-by: NBartlomiej Zolnierkiewicz <bzolnier@gmail.com>

This results in smaller/faster/simpler code and allows future optimizations.
Also remove no longer needed ide[_mm]_{inl,outl}() and ide_hwif_t.{INL,OUTL}.

v2:
* updated for scc_pata
Signed-off-by: NBartlomiej Zolnierkiewicz <bzolnier@gmail.com>

Signed-off-by: NBartlomiej Zolnierkiewicz <bzolnier@gmail.com>

also change __devinit tag for sgiioc4.c:ioc4_ide_init() to __init
Signed-off-by: NBartlomiej Zolnierkiewicz <bzolnier@gmail.com>

This patch removes a module_exit function that sgiioc4 should not have had.

It seems that the IDE layer doesn't support submodule unloading.  sgiioc4 was
the only driver in drivers/ide/pci that had an exit function.  After an
unload, the devices would stay around and the next attempt to reference would
crash...
Signed-off-by: NJeremy Higdon <jeremy@sgi.com>
Acked-by: N"Bartlomiej Zolnierkiewicz" <bzolnier@gmail.com>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

The SGI PCI-RT card, based on the SGI IOC4 chip, will be made available on
Altix XE (x86_64) platforms in the near future.  As such it is now a
misnomer for the IOC4 base device driver to live under drivers/sn, and
would complicate builds for non-SN2.

This patch moves the IOC4 base driver code from drivers/sn to drivers/misc,
and updates the associated Makefiles and Kconfig files to allow building on
non-SN2 configs.  Due to the resulting change in link order, it is now
necessary to use late_initcall() for IOC4 subdriver initialization.

[akpm@osdl.org: __udivdi3 fix]
[akpm@osdl.org: fix default in Kconfig]
Acked-by: NPat Gefre <pfg@sgi.com>
Acked-by: NJeremy Higdon <jeremy@sgi.com>
Signed-off-by: NBrent Casavant <bcasavan@sgi.com>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

Remove dma_base2 field from ide_hwif_t as it's used only in 2 drivers and
without great need.
Signed-off-by: NSergei Shtylyov <sshtylyov@ru.mvista.com>
Cc: John Keller <jpk@sgi.com>
Signed-off-by: NJeremy Higdon <jeremy@sgi.com>
Acked-by: NAlan Cox <alan@lxorguk.ukuu.org.uk>
Cc: Bartlomiej Zolnierkiewicz <B.Zolnierkiewicz@elka.pw.edu.pl>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

Fix some bugs in the patch that converted the IOC4 driver from port IO ops to
memio ops.

http://marc.theaimsgroup.com/?l=linux-ide&m=114895892231438&w=2

  Problems fixed are:
   - Call to default_hwif_mmiops() was not being done until _after_
     first IO operation, resulting in the first IO operation being
     done as a port IO op, instead of memio.
   - request_region() calls needed to be request_mem_region()
   - Incomplete error case handling.
   - Non-usage of ioremap() and __iomem.
Signed-off-by: NJohn Keller <jpk@sgi.com>
Signed-off-by: NJeremy Higdon <jeremy@sgi.com>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
Cc: Bartlomiej Zolnierkiewicz <B.Zolnierkiewicz@elka.pw.edu.pl>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

There are three different IO cards which an SGI IOC4 controller may find
itself on.  One of these variants does not bring out the IDE and serial
signals, so we need to disable attaching the corresponding IOC4 subdrivers
to such cards.

Cleans up message clutter emitted during device probing.
Signed-off-by: NBrent Casavant <bcasavan@sgi.com>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

From: Jeremy Higdon <jeremy@sgi.com>

This patch fixes a bug in sgiioc4 where it was using the default IDE port
I/O operations instead of MMIO.

The IDE part of the IOC4 chip uses MMIO to map the chip registers.
Unfortunately, the sgiioc4 driver uses the default port IO operations,
which happens to have worked for the past few years.  That's about to
change, however, thus this change from inX/outX to readX/writeX.
Signed-off-by: NJeremy Higdon <jeremy@sgi.com>
Cc: Bartlomiej Zolnierkiewicz <B.Zolnierkiewicz@elka.pw.edu.pl>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

Remove obsolete SGI address
Signed-off-by: NJes Sorensen <jes@sgi.com>
Signed-off-by: NTony Luck <tony.luck@intel.com>

Problem caused by the fact that the code used to only pick the low 16
bits of the bytecount.  That may be how some controllers act on it (byte
count of 0 means 0x10000), but not for this particular hardware.
Signed-off-by: NJeremy Higdon <jeremy@sgi.com>
Acked-by: NJes Sorensen <jes@sgi.com>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

Add a check to the sgiioc4 driver for the case where all available
ide_hwifs structures are in use.
Signed-off-by: NJeremy Higdon <jeremy@sgi.com>
Signed-off-by: NBartlomiej Zolnierkiewicz <bzolnier@gmail.com>

This series of patches reworks the configuration and internal structure
of the SGI IOC4 I/O controller device drivers.

These changes are motivated by several factors:

- The IOC4 chip PCI resources are of mixed use between functions (i.e.
  multiple functions are handled in the same address range, sometimes
  within the same register), muddling resource ownership and initialization
  issues.  Centralizing this ownership in a core driver is desirable.

- The IOC4 chip implements multiple functions (serial, IDE, others not
  yet implemented in the mainline kernel) but is not a multifunction
  PCI device.  In order to properly handle device addition and removal
  as well as module insertion and deletion, an intermediary IOC4-specific
  driver layer is needed to handle these operations cleanly.

- All IOC4 drivers are currently enabled by a single CONFIG value.  As
  not all systems need all IOC4 functions, it is desireable to enable
  these drivers independently.

- The current IOC4 core driver will trigger loading of all function-level
  drivers, as it makes direct calls to them.  This situation should be
  reversed (i.e. function-level drivers cause loading of core driver)
  in order to maintain a clear and least-surprise driver loading model.

- IOC4 hardware design necessitates some driver-level dependency on
  the PCI bus clock speed.  Current code assumes a 66MHz bus, but the
  speed should be autodetected and appropriate compensation taken.

This patch series effects the above changes by a newly and better designed
IOC4 core driver with which the function-level drivers can register and
deregister themselves upon module insertion/removal.  By tracking these
modules, device addition/removal is also handled properly.  PCI resource
management and ownership issues are centralized in this core driver, and
IOC4-wide configuration actions such as bus speed detection are also
handled in this core driver.

This patch:

The SGI IOC4 I/O controller chip implements multiple functions, though it is
not a multi-function PCI device.  Additionally, various PCI resources of the
IOC4 are shared by multiple hardware functions, and thus resource ownership by
driver is not clearly delineated.  Due to the current driver design, all core
and subordinate drivers must be loaded, or none, which is undesirable if not
all IOC4 hardware features are being used.

This patch reorganizes the IOC4 drivers so that the core driver provides a
subdriver registration service.  Through appropriate callbacks the subdrivers
can now handle device addition and removal, as well as module insertion and
deletion (though the IOC4 IDE driver requires further work before module
deletion will work).  The core driver now takes care of allocating PCI
resources and data which must be shared between subdrivers, to clearly
delineate module ownership of these items.
Signed-off-by: NBrent Casavant <bcasavan@sgi.com>
Acked-by: Pat Gefre <pfg@sgi.com
Acked-by: NJeremy Higdon <jeremy@sgi.com>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!