* Move xfer mode tuning code to ide-xfer-mode.c.

* Add CONFIG_IDE_XFER_MODE config option to be selected by host drivers
  that support xfer mode tuning.

* Add CONFIG_IDE_XFER_MODE=n static inline versions of ide_set_pio()
  and ide_set_xfer_rate().

* Make IDE_TIMINGS and BLK_DEV_IDEDMA config options select IDE_XFER_MODE,
  also add explicit selects for few host drivers that need it.

* Build/link ide-xfer-mode.o and ide-pio-blacklist.o (it is needed only
  by ide-xfer-mode.o) only if CONFIG_IDE_XFER_MODE=y.
Signed-off-by: NBartlomiej Zolnierkiewicz <bzolnier@gmail.com>

Remove stale comment from ide.c while at it.
Signed-off-by: NBartlomiej Zolnierkiewicz <bzolnier@gmail.com>

Acked-by: NSergei Shtylyov <sshtylyov@ru.mvista.com>
Signed-off-by: NBartlomiej Zolnierkiewicz <bzolnier@gmail.com>

Factor out processing of special commands from ide_special_rq()
to ide_do_devset() and ide_do_park_unpark().

There should be no functional changes caused by this patch.
Signed-off-by: NBartlomiej Zolnierkiewicz <bzolnier@gmail.com>

* Use elv_add_request() instead of __elv_add_request() in ide_do_drive_cmd().

* ide_do_drive_cmd() is used only in ide-{atapi,cd}.c so inline it there.

There should be no functional changes caused by this patch.
Acked-by: NSergei Shtylyov <sshtylyov@ru.mvista.com>
Signed-off-by: NBartlomiej Zolnierkiewicz <bzolnier@gmail.com>

Move ide_dma_timeout_retry() to ide-dma.c and add static inline
version for CONFIG_BLK_DEV_IDEDMA=n.
Acked-by: NSergei Shtylyov <sshtylyov@ru.mvista.com>
Signed-off-by: NBartlomiej Zolnierkiewicz <bzolnier@gmail.com>

Move drive_is_ready() to ide-io.c, then make it static.

Also make some minor CodingStyle fixups while at it.
Acked-by: NSergei Shtylyov <sshtylyov@ru.mvista.com>
Signed-off-by: NBartlomiej Zolnierkiewicz <bzolnier@gmail.com>

There are no modular ide_devset_execute() users left so unexport it.
Signed-off-by: NBartlomiej Zolnierkiewicz <bzolnier@gmail.com>

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

* taskfile_load_raw() is used only by do_drive_set_taskfiles()
  so inline it there.

While at it:
- rename 'args' variable to 'task'
- remove struct taskfile_array
- do ide_acpigtf check early
- use REGS_PER_GTF
Signed-off-by: NBartlomiej Zolnierkiewicz <bzolnier@gmail.com>

* ide_noacpi is already checked by ide_acpi_exec_tfs()
  which is the only user of do_drive_set_taskfiles().

* ide_acpi_exec_tfs() prints sufficient debug info about the
  device so no need to do it again.

* do_drive_get_GTF() + ide_acpi_exec_tfs() make sure that this
  function will never be called with incorrect gtf_length argument
  or if device is not present.
Signed-off-by: NBartlomiej Zolnierkiewicz <bzolnier@gmail.com>

* ide_noacpi is already checked by ide_acpi_exec_tfs()
  which is the only user of do_drive_get_GTF().

* ide_acpi_exec_tfs() prints sufficient debug info about the
  device so no need to have excessive data about port/host.

* It is sufficient to check for drive->acpidata->obj_handle
  as it will be NULL if dev == NULL or hwif->acpidata == NULL
  or device is not present.
Signed-off-by: NBartlomiej Zolnierkiewicz <bzolnier@gmail.com>

* ide_acpi_init() -> ide_acpi_init_port()

* ide_acpi_blacklist() -> ide_acpi_init()

* Call ide_acpi_init() only once (do it during IDE core
  initialization) and cleanup the function accordingly.
Signed-off-by: NBartlomiej Zolnierkiewicz <bzolnier@gmail.com>

* Add ide_for_each_present_dev() iterator and convert IDE code to use it.

* Do some drive-by CodingStyle fixups in ide-acpi.c while at it.

There should be no functional changes caused by this patch.
Signed-off-by: NBartlomiej Zolnierkiewicz <bzolnier@gmail.com>

Init ACPI handles for devices in ide_acpi_port_init_devices()
and remove no longer needed ide_acpi_drive_get_handle().
Signed-off-by: NBartlomiej Zolnierkiewicz <bzolnier@gmail.com>

ide_acpi_init() takes care of it.
Signed-off-by: NBartlomiej Zolnierkiewicz <bzolnier@gmail.com>

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

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

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

Remove superfluous

	local_save_flags()
	local_irq_enable_in_hardirq()

	...

	local_irq_restore()

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

Then make it static and remove 'dma' argument.
Acked-by: NSergei Shtylyov <sshtylyov@ru.mvista.com>
Signed-off-by: NBartlomiej Zolnierkiewicz <bzolnier@gmail.com>

* IDE_DFLAG_NO_IO_32BIT may be set by cmd640's ->init_dev method
  so don't clear it in ide_port_tune_devices() (+ no need to do it).

* Move IDE_DFLAG_NO_IO_32BIT handling to ide_port_init_devices().
Signed-off-by: NBartlomiej Zolnierkiewicz <bzolnier@gmail.com>

dma_map_sg could return a value different to 'nents' argument of
dma_map_sg so the ide stack needs to save it for the later usage
(e.g. for_each_sg).

The ide stack also needs to save the original sg_nents value for
pci_unmap_sg.
Signed-off-by: NFUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
[bart: backport to Linus' tree]
Signed-off-by: NBartlomiej Zolnierkiewicz <bzolnier@gmail.com>

since it fails the virt_to_page() translation check with DEBUG_VIRTUAL
enabled.
Signed-off-by: NBorislav Petkov <petkovbb@gmail.com>
[bart: backport to Linus' tree]
Signed-off-by: NBartlomiej Zolnierkiewicz <bzolnier@gmail.com>

This is IDE host driver for AT91 (SAM9, CAP9, AT572D940HF) Static Memory
Controller with Compact Flash True IDE Mode logic.

Driver have to switch 8/16 bit bus width when accessing Task Tile or Data
Register. Moreover some extra things need to be done when setting PIO mode.
Only PIO mode is used, hardware have no DMA support. If interrupt line is
connected through GPIO extra quirk is needed to cope with fake interrupts.
Signed-off-by: NStanislaw Gruszka <stf_xl@wp.pl>
Cc: Andrew Victor <avictor.za@gmail.com>
Acked-by: NSergei Shtylyov <sshtylyov@ru.mvista.com>
Signed-off-by: NBartlomiej Zolnierkiewicz <bzolnier@gmail.com>

Signed-off-by: NStanislaw Gruszka <stf_xl@wp.pl>
Cc: Andrew Victor <linux@maxim.org.za>
[bart: minor checkpatch.pl / CodingStyle fixups]
Signed-off-by: NBartlomiej Zolnierkiewicz <bzolnier@gmail.com>

Commit 9567b349 (ide: merge ->atapi_*put_bytes
and ->ata_*put_data methods) introduced a regression  WRT the odd-length ATAPI
PIO transfers -- the final word didn't get written (causing command timeouts).
Signed-off-by: NSergei Shtylyov <sshtylyov@ru.mvista.com>
Signed-off-by: NBartlomiej Zolnierkiewicz <bzolnier@gmail.com>

Fix this sparse warnings:
  drivers/ide/ide-disk_proc.c:130:11: warning: Using plain integer as NULL pointer
  drivers/ide/ide-floppy_proc.c:32:11: warning: Using plain integer as NULL pointer
  drivers/ide/ide-proc.c:234:11: warning: Using plain integer as NULL pointer
  drivers/ide/ide-tape.c:2141:11: warning: Using plain integer as NULL pointer
Signed-off-by: NHannes Eder <hannes@hanneseder.net>
Cc: trivial@kernel.org
Cc: kernel-janitors@vger.kernel.org
Cc: Al Viro <viro@ZenIV.linux.org.uk>
Signed-off-by: NBartlomiej Zolnierkiewicz <bzolnier@gmail.com>

bart:
It seems like the bug could cause insanely long timeouts for:
- ATA_DMA_ERR error in dma_timer_expiry()
- commands without ->expiry in tc86c001_timer_expiry()
  (TC86C001 IDE controller only)
Signed-off-by: NRoel Kluin <roel.kluin@gmail.com>
Cc: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
[bart: port it to the current tree]
Signed-off-by: NBartlomiej Zolnierkiewicz <bzolnier@gmail.com>

During host driver module removal del_gendisk() results in a final
put on drive->gendev and freeing the drive by drive_release_dev().

Convert device drivers from using struct kref to use struct device
so device driver's object holds reference on ->gendev and prevents
drive from prematurely going away.

Also fix ->remove methods to not erroneously drop reference on a
host driver by using only put_device() instead of ide*_put().
Reported-by: NStanislaw Gruszka <stf_xl@wp.pl>
Tested-by: NStanislaw Gruszka <stf_xl@wp.pl>
Signed-off-by: NBartlomiej Zolnierkiewicz <bzolnier@gmail.com>

Just copy the comment from drivers/scsi/sr.c::sr_done()
(from which the capacity hack has been originated).

Cc: Borislav Petkov <petkovbb@gmail.com>
Acked-by: NSergei Shtylyov <sshtylyov@ru.mvista.com>
Signed-off-by: NBartlomiej Zolnierkiewicz <bzolnier@gmail.com>

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

Fix missing parentheses so PIO/DMA timings for master device on the
second channel are programmed correctly (IOW "8 0 24 16" offset values
should be used instead of the current "8 0 16 16").

[ The bug went unnoticed because after PIO/DMA timings get programmed
  incorrectly for the third device they are overwritten with timings
  for the fourth device and since BIOS should also program timings for
  the third device everything should work fine until suspend/resume
  cycle or user requested transfer mode changes. ]
Signed-off-by: NRoel Kluin <roel.kluin@gmail.com>
Cc: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
[bart: update patch description]
Signed-off-by: NBartlomiej Zolnierkiewicz <bzolnier@gmail.com>

Device and vendor ids were confused
Signed-off-by: NRoel Kluin <roel.kluin@gmail.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Acked-by: NSergei Shtylyov <sshtylyov@ru.mvista.com>
Signed-off-by: NBartlomiej Zolnierkiewicz <bzolnier@gmail.com>

Documentation/kernel-parameters.txt
- ide=nodma is no longer valid.

drivers/ide/Kconfig
- The module is ide-core.ko not ide.

drivers/ide/ide.c
- It took me a while to figure out what the arguments %d.%d:%d to nodma
  module parameter ment, so I added a comment to each.
- Added a comment to each of the sscanf lines.
- There is a bug, if j is 0 it would previously clear all the other bits
  except the current device, changed in three different places.
  mask &= (1 << i) should be mask &= ~(1 << i).
Signed-off-by: NDavid Fries <david@fries.net>
[bart: s/disk/device/ in ide.c, beautify patch description]
Signed-off-by: NBartlomiej Zolnierkiewicz <bzolnier@gmail.com>

The @fnac.net will be shut down within a couple of months, so fix my
email address.
Signed-off-by: NSamuel Thibault <samuel.thibault@ens-lyon.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

We need to pass struct ide_port_info also to ide_host_register().

v2:
Fix v5/v6 mismatch noticed by Russell.

Cc: Russell King <rmk@arm.linux.org.uk>
Signed-off-by: NBartlomiej Zolnierkiewicz <bzolnier@gmail.com>

The bcount is greater than 0 and less than or equal to 0x10000.
Thus '(bcount & 0xffff) == 0x0000' can be simplified as 'bcount == 0x10000'.
Suggested-by: NSergei Shtylyov <sshtylyov@ru.mvista.com>
Signed-off-by: NAtsushi Nemoto <anemo@mba.ocn.ne.jp>
Signed-off-by: NBartlomiej Zolnierkiewicz <bzolnier@gmail.com>

This is a port of libata's pata_cs5536.c (written by Martin K. Petersen)
to IDE subsystem.

Changes done while at it:

* Reprogram PIO/MWDMA timings if needed before and after DMA transfer
  (chipset uses shared PIO/MWDMA timings).

* Fix cable detection to report 80-wires cable if BIOS set it for any
  device on a port (IDE core will do drive-side cable detection later).

* Don't disable UDMA while programming PIO timings.

* Simplify PCI/MSR support.

Pros of having IDE host driver in addition to libata's one:

* IDE is much lighter than SCSI+libata, the host driver itself is also
  a bit smaller:

   text    data     bss     dec     hex filename
   1261     496       4    1761     6e1 drivers/ata/pata_cs5536.o
   1242     128       4    1374     55e drivers/ide/cs5536.o

* This allows use of IDE features which are unavailable under libata.

v2:
* Fixes per review from Sergei:
  - simplify dependency check in Kconfig
  - use IDE_DRV_MASK also for ->drive_data
  - disable UDMA when programming MWDMA
  - program new DTC timings only when necessary
  - fix printk() level in cs5536_init_one()

* Fix patch description according to comments from Alan and Sergei.

v3:
* Smarter masking of UDMA bits per Sergei's suggestion.

Cc: Martin K. Petersen <mkp@mkp.net>
Cc: Karl Auerbach <karl@iwl.com>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
Acked-by: NSergei Shtylyov <sshtylyov@ru.mvista.com>
Signed-off-by: NBartlomiej Zolnierkiewicz <bzolnier@gmail.com>

The AmigaOne uses the onboard VIA IDE controller in legacy mode (like the
Pegasos).
Signed-off-by: NGerhard Pircher <gerhard_pircher@gmx.net>
Cc: "Grant Likely" <grant.likely@secretlab.ca>
Signed-off-by: NBartlomiej Zolnierkiewicz <bzolnier@gmail.com>