Signed-off-by: NJoseph Chan <josephchan@via.com.tw>
Signed-off-by: NJeff Garzik <jeff@garzik.org>

Programming DMA mode may destroy current PIO mode setting so if
CONFIG_HPT34X_AUTODMA=n (the default case) make ide_tune_dma() fail
early by disabling all host DMA masks and re-tune PIO mode.

This fix doesn't help with the driver being broken but is needed
for some other changes.
Signed-off-by: NBartlomiej Zolnierkiewicz <bzolnier@gmail.com>

If ->dma_base is not set (== PCI BAR4 cannot be reserved) then DMA hooks
shouldn't be initialized or bad things will happen.
Acked-by: NSergei Shtylyov <sshtylyov@ru.mvista.com>
Signed-off-by: NBartlomiej Zolnierkiewicz <bzolnier@gmail.com>

If ->dma_base is not set (== PCI BAR4 cannot be reserved) then DMA hooks
shouldn't be initialized or bad things will happen.
Acked-by: NSergei Shtylyov <sshtylyov@ru.mvista.com>
Signed-off-by: NBartlomiej Zolnierkiewicz <bzolnier@gmail.com>

If ->dma_base is not set (== PCI BAR4 cannot be reserved) then DMA hooks
shouldn't be initialized or bad things will happen.

Also this host driver requires valid PCI BAR4 for normal operation so
check it in ->init_chipset and fail initialization if not set.
Signed-off-by: NBartlomiej Zolnierkiewicz <bzolnier@gmail.com>

If ->dma_base is not set (== PCI BAR4 cannot be reserved) then DMA hooks
shouldn't be initialized or bad things will happen.

Also this host driver requires valid PCI BAR4 for normal operation so
check it in ->init_chipset and fail initialization if not set.
Signed-off-by: NBartlomiej Zolnierkiewicz <bzolnier@gmail.com>

* Add DMA blacklist checking (->ide_dma_on check probably can go now).

* Add ->atapi_dma flag checking and remove no longer needed
  ns87415_ide_dma_check() from ns87415 host driver.

* Remove now needless __ide_dma_check() wrapper and symbol export.

* Check drive->autodma instead of hwif->autodma (there should be no changes in
  behavior as all users of config_drive_for_dma() set both ->autodma flags).
Signed-off-by: NBartlomiej Zolnierkiewicz <bzolnier@gmail.com>

* Use pio == 255 == "auto-tune" in scc_config_drive_for_dma() instead of
  forcing PIO4 on PIO fallback.  Fix comment while at it.

* Rename scc_tuneproc() to scc_tune_pio() and add scc_tuneproc() wrapper.
  Move finding of the best PIO mode and setting of transfer mode on the device
  to the new wrapper.

* Fix scc_tune_chipset() to tune PIO modes.  Do a small cleanup while at it.
Acked-by: NSergei Shtylyov <sshtylyov@ru.mvista.com>
Signed-off-by: NBartlomiej Zolnierkiewicz <bzolnier@gmail.com>

* Don't call {piix,slc90e66}_dma_2_pio() for PIO modes in
  {piix,slc90e66}_tune_chipset().

* Add PIO1 handling to {piix,slc90e66}_tune_chipset().

* Bump driver version.  

v2:
* Remove PIO modes from {piix,slc90e66}_dma_2_pio(), they are no longer needed
  there (Noticed by Sergei)
Acked-by: NSergei Shtylyov <sshtylyov@ru.mvista.com>
Signed-off-by: NBartlomiej Zolnierkiewicz <bzolnier@gmail.com>

* Set transfer mode on the device in jmicron_tuneproc(),
  also add pio == 255 == "auto-tune" handling.

* Use jmicron_tuneproc() in jmicron_config_drive_for_dma().

* Remove no longer needed config_jmicron_chipset_for_pio().
Acked-by: NSergei Shtylyov <sshtylyov@ru.mvista.com>
Signed-off-by: NBartlomiej Zolnierkiewicz <bzolnier@gmail.com>

* Rename it8213_tuneproc() to it8213_tune_pio() and add it8213_tuneproc()
  wrapper.  Move finding of the best PIO mode to the new wrapper.

* Add setting of transfer mode on the device to it8213_tuneproc().

* Don't call it8213_dma_2_pio() for PIO modes in it8213_tune_chipset().

* Use it8213_tuneproc() in it8213_config_drive_for_dma().

v2:
* Remove PIO modes from it8213_dma_2_pio(), they are no longer needed there
  (Noticed by Sergei)
Acked-by: NSergei Shtylyov <sshtylyov@ru.mvista.com>
Signed-off-by: NBartlomiej Zolnierkiewicz <bzolnier@gmail.com>

* Fix cs5535_tuneproc() to pass PIO transfer mode value instead of PIO mode
  number to cs5535_set_speed() (fixes random PIO timings being programmed
  and a possible OOPS).  Do a little cleanup while at it.

* Fix cs5535_set_speed() to check if the mate device is present (fixes PIO0
  taskfile timings being used if there is no other device on the cable).

* Use cs5535_tuneproc() in cs5535_dma_check().  The old code had the same
  issue as cs5535_tuneproc() and add additionally caused 0x00-0x04 transfer
  mode values (== default PIO, default PIO w/ IORDY + two invalid values)
  being set on the device instead of values 0x08-0x0c (XFER_PIO_[0,4]).
Acked-by: NSergei Shtylyov <sshtylyov@ru.mvista.com>
Signed-off-by: NBartlomiej Zolnierkiewicz <bzolnier@gmail.com>

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

Fix a couple of runtogether printks in cmd64x.c IDE driver by adding 
proper newlines.
Signed-off-by: NMeelis Roos <mroos@linux.ee>
Signed-off-by: NBartlomiej Zolnierkiewicz <bzolnier@gmail.com>

Recognise the FSC Amilo A1630's incarnation of a SiS5513 chip as laptop to
get UDMA100 support.
Signed-off-by: NDavid Lamparter <equinox@diac24.net>
Cc: Lionel Bouton <Lionel.Bouton@inet6.fr>
Signed-off-by: NBartlomiej Zolnierkiewicz <bzolnier@gmail.com>

Direct port of Alan's fix for pata_ali.

Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
Signed-off-by: NBartlomiej Zolnierkiewicz <bzolnier@gmail.com>

As found by the Coverity checker, and reported by Adrian Bunk, this
fixes a overrun error in the CS5535 IDE driver.  Somebody got a little
excited with the if() statement - the CS5535 only supports UDMA 0-4.

Bart:
Not a bug per se since the upper layer will never feed this function
with speed > XFER_UDMA_4 (thanks to ->ultra_mask being set to 0x1f).

Worth fixing anyway.
Signed-off-by: NJordan Crouse <jordan.crouse@amd.com>
Cc: Adrian Bunk <bunk@stusta.de>
Signed-off-by: NBartlomiej Zolnierkiewicz <bzolnier@gmail.com>

Signed-off-by: NAl Viro <viro@zeniv.linux.org.uk>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

* Add ATA_PIO[0-6] defines to <linux/ata.h>.

* Add ->pio_mask field to ide_pci_device_t and ide_hwif_t.

* Add PIO masks to host drivers.

<linux/ata.h> change ACK-ed by Jeff Garzik <jeff@garzik.org>.
Acked-by: NSergei Shtylyov <sshtylyov@ru.mvista.com>
Signed-off-by: NBartlomiej Zolnierkiewicz <bzolnier@gmail.com>

* Add ->host_flags to ide_hwif_t to store ide_pci_device_t.host_flags,
  assign it in setup-pci.c:ide_pci_setup_ports().

* Add IDE_HFLAG_PIO_NO_{BLACKLIST,DOWNGRADE} to ide_pci_device_t.host_flags
  and teach ide_get_best_pio_mode() about them.  Also remove needless
  !drive->id check while at it (drive->id is always present).

* Convert amd74xx, via82cxxx and ide-timing.h to use ide_get_best_pio_mode()
  and then remove no longer needed ide_find_best_pio_mode().

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

* Drop no longer needed "PIO data" argument from ide_get_best_pio_mode()
  and convert all users accordingly.

* Remove no longer needed ide_pio_data_t.
Acked-by: NSergei Shtylyov <sshtylyov@ru.mvista.com>
Signed-off-by: NBartlomiej Zolnierkiewicz <bzolnier@gmail.com>

* Add ide_pio_cycle_time() helper.

* Use it in ali14xx/ht6560b/qd65xx/cmd64{0,x}/sl82c105 and pmac host drivers
  (previously cycle time given by the device was only used for "pio" == 255).

* Remove no longer needed ide_pio_data_t.cycle_time field.

v2:
* Fix "ata_" prefix (Noticed by Jeff).
Acked-by: NSergei Shtylyov <sshtylyov@ru.mvista.com>
Cc: Jeff Garzik <jeff@garzik.org>
Signed-off-by: NBartlomiej Zolnierkiewicz <bzolnier@gmail.com>

* Nowadays core IDE code handles restoring of PIO and DMA modes
  (ide-io.c:ide_start_power_step() etc) so remove open-coded version
  from sc1200_resume().

  There should be no change in behavior because settings done by
  sc1200_resume() were always overridden by generic_ide_resume()
  and ide_{start,stop}_power_step().

* Bump driver version.

Cc: Mark Lord <mlord@pobox.com>
Signed-off-by: NBartlomiej Zolnierkiewicz <bzolnier@gmail.com>

The driver used to depend on BIOS settings for deciding whether it is OK
to use DMA.  However it seems that BIOS doesn't always handle all cases
correctly so just let IDE core to decide about this.  It should be a safe
thing to do now, after the driver went through heavy bugfixing.

Thanks for bugreport and testing the patch goes out to Sven Niedner.
Signed-off-by: NBartlomiej Zolnierkiewicz <bzolnier@gmail.com>

* Always set ->autotune so PIO gets correctly auto-tuned (previously
  ->autotune was only set when ->dma_base wasn't available, however
  ->ide_dma_check()/->speedproc() was always trying to tune PIO when
  tuning DMA).

* Move code responsible for programming chipset for PIO mode from
  svwks_tune_chipset() to svwks_tune_pio().  Don't tune PIO when tuning
  DMA (this is no longer needed since ->autotune is always set now).

* Handle PIO modes early in svwks_tune_chipset() so DMA configuration
  registers don't get cleared when programming PIO mode.

* Bump driver version.
Signed-off-by: NBartlomiej Zolnierkiewicz <bzolnier@gmail.com>

* Rename ide_pci_device_t.flags to ide_pci_device_t.host_flags
  and IDEPCI_FLAG_ISA_PORTS flag to IDE_HFLAG_ISA_PORTS.

* Add IDE_HFLAG_SINGLE flag for single channel devices.

* Convert core code and all IDE PCI drivers to use IDE_HFLAG_SINGLE
  and remove no longer needed ide_pci_device_t.channels field.

v2:
* Fix issues noticed by Sergei:
  - correct code alignment in scc_pata.c
  - s/IDE_HFLAG_SINGLE/~IDE_HFLAG_SINGLE/ in serverworks.c
Acked-by: NSergei Shtylyov <sshtylyov@ru.mvista.com>
Signed-off-by: NBartlomiej Zolnierkiewicz <bzolnier@gmail.com>

* Add ide_dev_has_iordy() helper and use it sl82c105 host driver.

* Remove no longer needed ide_pio_data_t.use_iordy field.

v2/v3:
* Fix issues noticed by Sergei:
  - correct patch description
  - fix comment in ide_get_best_pio_mode()

v4:
* Fix "ata_" prefix (Noticed by Jeff).
Acked-by: NSergei Shtylyov <sshtylyov@ru.mvista.com>
Cc: Jeff Garzik <jeff@garzik.org>
Signed-off-by: NBartlomiej Zolnierkiewicz <bzolnier@gmail.com>

* Print info about overriding PIO mode in ide_get_best_pio_mode().

* Remove info about overriding PIO mode from cmd64{0,x} host drivers.

* Remove no longer needed ide_pio_data_t.overridden field.
Acked-by: NSergei Shtylyov <sshtylyov@ru.mvista.com>
Signed-off-by: NBartlomiej Zolnierkiewicz <bzolnier@gmail.com>

* Add sil_tuneproc() wrapper for siimage_tuneproc() which also sets
  PIO mode on the device.

* Add missing ide_get_best_pio_mode() call to sil_tuneproc() so
  "pio" == 255 (autotune) is handled correctly (previously PIO0 was used)
  and "pio" values > 4 && < 255 are filtered to PIO4 (instead of PIO0).

* Add code limiting maximum PIO mode according to the pair device capabilities
  to sil_tuneproc().

* Convert users of config_siimage_chipset_for_pio() to use sil_tune_pio() and
  sil_tuneproc().  This fixes PIO fallback in siimage_config_drive_for_dma() to
  use max PIO mode available instead of PIO4 (config_siimage_chipset_for_pio()
  used wrong arguments for ide_get_best_pio_mode() and as a results always
  tried to set PIO4).

* Remove no longer needed siimage_taskfile_timing()
  and config_siimage_chipset_for_pio().

* Enable ->autotune unconditionally and remove PIO tuning for UDMA/MDMA modes
  from siimage_speedproc()

* Bump driver version.

v2:
* Fix issues noticed by Sergei:
  - correct pair device check
  - trim only taskfile PIO to the slowest of the master/slave
  - enable ->autotune unconditionally and remove PIO tuning for UDMA/MDMA modes
    from siimage_speedproc()
  - add TODO item for IORDY bugs
  - minor cleanups
Reviewed-by: NSergei Shtylyov <sshtylyov@ru.mvista.com>
Signed-off-by: NBartlomiej Zolnierkiewicz <bzolnier@gmail.com>

* Split off exisiting atiixp_tuneproc() into atiixp_tune_pio()
  and then add setting device PIO mode to atiixp_tuneproc().

* Add missing ide_get_best_pio_mode() call to atiixp_tuneproc() so
  "pio" == 255 (autotune) is handled correctly and "pio" values > 4 && < 255
  are filtered to PIO4 (previously "pio" == 5 could result in wrong timings
  being used and "pio" values > 4 && < 255 in an OOPS).

* Handle PIO modes early in atiixp_speedproc() so save_mdma_mode[]
  doesn't get cleared.

* In atiixp_dma_check():
  - fix max_mode argument for ide_get_best_pio_mode()
  - don't call atiixp_dma_2_pio() so PIO1 doesn't get remapped to PIO0
  - use atiixp_tuneproc() instead of atiixp_speedproc()

* Bump driver version.
Signed-off-by: NBartlomiej Zolnierkiewicz <bzolnier@gmail.com>

Various old IDE drivers go mapping ROM devices for no apparent reason and
without using the ROM mapping API we now have. They don't actually use
the ROM they map and the new libata drivers are happy without it being
mapped so rather than port them lets just junk it for the next -rc1.
Signed-off-by: NAlan Cox <alan@redhat.com>
Acked-by: NSergei Shtylyov <sshtylyov@ru.mvista.com>
Cc: Andrew Morton <akpm@osdl.org>
Signed-off-by: NBartlomiej Zolnierkiewicz <bzolnier@gmail.com>

Workaround for errata A308: turn down the UDMA mode and retry
the DMA command when the data lost condition is detected.

take2:
udma_filter() hook is used to limit ATAPI UDMA mode.
Signed-off-by: NKou Ishizaki <kou.ishizaki@toshiba.co.jp>
Signed-off-by: NAkira Iguchi <akira2.iguchi@toshiba.co.jp>
Cc: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Signed-off-by: NBartlomiej Zolnierkiewicz <bzolnier@gmail.com>

Move to using inline function variant of eieio instead of inline assmebly.
Signed-off-by: NKumar Gala <galak@kernel.crashing.org>
Cc: kou.ishizaki@toshiba.co.jp
Acked-by: NSergei Shtylyov <sshtylyov@ru.mvista.com>
Signed-off-by: NBartlomiej Zolnierkiewicz <bzolnier@gmail.com>

As suggested by Andrew, add pci_try_set_mwi(), which does not require
return-value checking.

- add pci_try_set_mwi() without __must_check
- make it return 0 on success, errno if the "try" failed or error
- review callers
Signed-off-by: NRandy Dunlap <randy.dunlap@oracle.com>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>

Instead of all drivers reading pci config space to get the revision
ID, they can now use the pci_device->revision member.

This exposes some issues where drivers where reading a word or a dword
for the revision number, and adding useless error-handling around the
read. Some drivers even just read it for no purpose of all.

In devices where the revision ID is being copied over and used in what
appears to be the equivalent of hotpath, I have left the copy code
and the cached copy as not to influence the driver's performance.

Compile tested with make all{yes,mod}config on x86_64 and i386.
Signed-off-by: NAuke Kok <auke-jan.h.kok@intel.com>
Acked-by: NDave Jones <davej@redhat.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>

Backport short cables support from pata_via.c.

This patch should allow UDMA > 2 modes on Acer Ferrari 3400.
Signed-off-by: NBartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Acked-by: NSergei Shtylyov <sshtylyov@ru.mvista.com>

Backport short cables support from pata_sis.c.

This patch allows UDMA > 2 modes on ASUS A6K.

Thanks to testing this patch goes out to Jiri Stavinoha.
Signed-off-by: NBartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Acked-by: NSergei Shtylyov <sshtylyov@ru.mvista.com>

Backport short cables support from pata_ali.c and while at it cleanup
existing cable detection code.

This patch should allow UDMA > 2 modes on HP Pavilion N5430 and Fujitsu P2000.
Signed-off-by: NBartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Acked-by: NSergei Shtylyov <sshtylyov@ru.mvista.com>

Backport short cables support from ata_piix.c.

This patch should allow UDMA > 2 modes on:
- Acer 5602WLMi
- Acer 3682WLMi
- Asus W5F
- Acer Aspire 2023WLMi
Signed-off-by: NBartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Acked-by: NSergei Shtylyov <sshtylyov@ru.mvista.com>

This patch allows users to override both host and device side cable detection
with "ideX=ata66" kernel parameter.  Thanks to this it should be now possible
to use UDMA > 2 modes on systems (laptops mainly) which use short 40-pin cable
instead of 80-pin one.

Next patches add automatic detection of some systems using short cables.

Changes:

* Rename hwif->udma_four to hwif->cbl and make it u8.

* Convert all existing users accordingly (use ATA_CBL_* defines while at it).  

* Add ATA_CBL_PATA40_SHORT support to ide-iops.c:eighty_ninty_three().

* Use ATA_CBL_PATA40_SHORT for "ideX=ata66" kernel parameter.
Signed-off-by: NBartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Reviewed-by: NSergei Shtylyov <sshtylyov@ru.mvista.com>