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path: root/drivers/ide
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2007-10-16amd74xx: remove /proc/ide/amd74xxBartlomiej Zolnierkiewicz
This belongs to user-space (and only if really needed). text data bss dec hex filename 6723 2000 28 8751 222f drivers/ide/pci/amd74xx.o.before 3833 2000 16 5849 16d9 drivers/ide/pci/amd74xx.o.after Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
2007-10-16amd74xx/via82cxxx: don't initialize drive->dnBartlomiej Zolnierkiewicz
drive->dn is initialized by ide-probe.c::probe_hwif() so no need to do it in ->init_hwif method. Acked-by: Sergei Shtylyov <sshtylyov@ru.mvista.com> Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
2007-10-16sis5513: remove /proc/ide/sisBartlomiej Zolnierkiewicz
This belongs to user-space (and only if really needed). text data bss dec hex filename 7129 404 8 7541 1d75 drivers/ide/pci/sis5513.o.before 3916 404 1 4321 10e1 drivers/ide/pci/sis5513.o.after Additionaly to being bloat the code contained two bugs: - wrong cable bit was checked (0x0001 instead of 0x8000) on ATA_133 chipsets - incorrect UDMA cycle time was reported on ATA_100a/ATA_133 chipsets Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
2007-10-16ide: remove CONFIG_IDEDMA_ONLYDISKBartlomiej Zolnierkiewicz
ATAPI devices with broken DMA support should be handled by DMA blacklist and for debugging purposes we have new shiny "hdx=nodma" kernel paremeter. Acked-by: Sergei Shtylyov <sshtylyov@ru.mvista.com> Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
2007-10-16ide: add "hdx=nodma" kernel parameterBartlomiej Zolnierkiewicz
* Add "hdx=nodma" option allowing user to disallow DMA for a given device. * Obsolete "ide=nodma" option. Acked-by: Sergei Shtylyov <sshtylyov@ru.mvista.com> Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
2007-10-16ide: remove hwif->autodma and drive->autodmaBartlomiej Zolnierkiewicz
* hpt34x.c: disable DMA masks for HPT345 (hwif->autodma is zero so DMA won't be enabled anyway). * trm290.c: disable IDE_HFLAG_TRUST_BIOS_FOR_DMA flag (hwif->autodma is zero so DMA won't be enabled anyway). * Check noautodma global variable instead of drive->autodma in ide_tune_dma(). This fixes handling of "ide=nodma" kernel parameter for icside, ide-cris, au1xxx-ide, pmac, it821x, jmicron, sgiioc4 and siimage host drivers. * Remove hwif->autodma (it was not checked by IDE core code anyway) and drive->autodma (was set by all host drivers - except HPT345/TRM290 special cases - unless "ide=nodma" was used). While at it: - remove needless printk() from icside.c - remove stale FIXME/comment from ide-probe.c - don't force DMA off if PCI bus-mastering had to be enabled in setup-pci.c (this setting was always later over-ridden by host drivers anyway) Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
2007-10-16ide: remove "idex=dma" kernel parameterBartlomiej Zolnierkiewicz
It has been obsoleted since 1 Nov 2004, is valid only when used together with "ide=nodma" kernel parameter (which makes no sense) and only for aec62xx, cmd64x, cs5220, generic, hpt366, sl82c105, tc86c001 and triflex host drivers. Acked-by: Sergei Shtylyov <sshtylyov@ru.mvista.com> Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
2007-10-16ide: remove CONFIG_BLK_DEV_IDEDMA_FORCEDBartlomiej Zolnierkiewicz
This code doesn't use pci_assign_resource() and ide_get_or_set_dma_base() uses pci_resource_start() to get DMA base address so it has no chance of working. Moreover this belongs to PCI quirks (in case somebody would like to fix it). Acked-by: Sergei Shtylyov <sshtylyov@ru.mvista.com> Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
2007-10-16ide: use PCI_VDEVICE() macroBartlomiej Zolnierkiewicz
While at it: - make struct pci_device_id tables const - use PCI_DEVICE_ID_ITE_8213 define in it8213.c - fix comment in generic.c Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
2007-10-16sis5513: clear prefetch and postwrite for ATAPI devicesBartlomiej Zolnierkiewicz
Clear prefetch and postwrite for ATAPI devices instead of depending on BIOS. Acked-by: Sergei Shtylyov <sshtylyov@ru.mvista.com> Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
2007-10-16it8213/piix/slc90e66: "de-couple" PIO and UDMA modesBartlomiej Zolnierkiewicz
Don't force PIO4 when programming UDMA mode (suggested by Sergei). Acked-by: Sergei Shtylyov <sshtylyov@ru.mvista.com> Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
2007-10-16ide: unexport noautodmaAdrian Bunk
noautodma can now be unexported. Signed-off-by: Adrian Bunk <bunk@kernel.org> Cc: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
2007-10-16ide: unexport ide_tune_dmaAdrian Bunk
static code mustn't be exported. Signed-off-by: Adrian Bunk <bunk@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
2007-10-16ide: remove ->ide_dma_check (take 2)Bartlomiej Zolnierkiewicz
* Add IDE_HFLAG_TRUST_BIOS_FOR_DMA host flag for host drivers that depend on BIOS for programming device/controller for DMA. Set it in cy82c693, generic, ns87415, opti621 and trm290 host drivers. * Add IDE_HFLAG_VDMA host flag for host drivers using VDMA. Set it in cs5520 host driver. * Teach ide_tune_dma() about IDE_HFLAG_TRUST_BIOS_FOR_DMA flag. * Add generic ide_dma_check() helper and remove all open coded ->ide_dma_check implementations. Fix all places checking for presence of ->ide_dma_check hook to check for ->ide_dma_on instead. * Remove no longer needed code from config_drive_for_dma(). * Make ide_tune_dma() static. v2: * Fix config_drive_for_dma() return values. * Fix ide-dma.c build for CONFIG_BLK_DEV_IDEDMA_PCI=n by adding dummy config_drive_for_dma() inline. * Fix IDE_HFLAG_TRUST_BIOS_FOR_DMA handling in ide_dma_check(). * Fix init_hwif_it8213() comment. There should be no functionality changes caused by this patch. Cc: Sergei Shtylyov <sshtylyov@ru.mvista.com> Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
2007-10-16ide-pmac: add PIO autotune fallback to ->ide_dma_checkBartlomiej Zolnierkiewicz
Since ide-pmac allows separate PIO and DMA timings, and ide-pmac always sets ->autotune this change shouldn't have any other effect than bringing ide-pmac driver in-line with other host drivers wrt ->ide_dma_check implementation. Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Acked-by: Sergei Shtylyov <sshtylyov@ru.mvista.com> Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
2007-10-16ide-cris: add PIO autotune fallback to ->ide_dma_checkBartlomiej Zolnierkiewicz
Since ide-cris allows separate PIO and DMA timings, and ide-cris always sets ->autotune this change shouldn't have any other effect than bringing ide-cris driver in-line with other host drivers wrt ->ide_dma_check implementation. Cc: Mikael Starvik <starvik@axis.com> Acked-by: Sergei Shtylyov <sshtylyov@ru.mvista.com> Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
2007-10-16sl82c105: add PIO autotune fallback to ->ide_dma_checkBartlomiej Zolnierkiewicz
Since sl82c105 re-programs DMA/PIO timings for DMA enable/disable, and sets ->autotune this change shouldn't have any other effect than bringing sl82c105 driver in-line with other host drivers wrt ->ide_dma_check implementation. Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
2007-10-16cs5530/sc1200: add PIO autotune fallback to ->ide_dma_checkBartlomiej Zolnierkiewicz
* Add PIO autotune fallback to ->ide_dma_check. Since cs5530/sc1200 allow separate PIO and DMA timings, and cs5530/sc1200 always set ->autotune this change shouldn't have any other effect than bringing these drivers in-line with other host drivers wrt ->ide_dma_check implementations. * Fix ->ide_dma_check to return "-1" if DMA cannot be set. * Bump driver version. Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
2007-10-16ide: remove ide_use_fast_pio()Bartlomiej Zolnierkiewicz
Remove ide_use_fast_pio() and just re-tune PIO unconditionally if DMA tuning has failed in ->ide_dma_check. All host drivers using ide_use_fast_pio() set drive->autotune so PIO is always tuned anyway and in some cases we _really_ need to re-tune PIO because PIO and DMA timings are shared. Acked-by: Sergei Shtylyov <sshtylyov@ru.mvista.com> Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
2007-10-16ide: remove drive->init_speed zeroingBartlomiej Zolnierkiewicz
Several host drivers used to reset drive->init_speed in their ->ide_dma_check implementations which resulted in incorrect init speed being reported to the user, fix it. Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
2007-10-16au1xxx-ide: use ide_tune_dma()Bartlomiej Zolnierkiewicz
* Remove needless setting of drive->using_dma from auide_dma_check(). * Split off auide_mdma_filter() from auide_dma_check(). * Use ide_tune_dma() in auide_dma_check(), this fixes following issues: - device's DMA capability bit not being checked - device not being checked against generic DMA blacklist - transfer mode not being set on device/host * Add PIO autotune fallback to auide_dma_check(). Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
2007-10-16it8213/piix/slc90e66: remove {it8213,piix,slc90e66}_dma_2_pio()Bartlomiej Zolnierkiewicz
Acked-by: Sergei Shtylyov <sshtylyov@ru.mvista.com> Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
2007-10-16atiixp: DMA setup fixesBartlomiej Zolnierkiewicz
* Fix handling of unsupported/invalid modes in atiixp_set_dma_mode(). * ATI controllers allow separate PIO and DMA timings so remove programming of PIO modes from atiixp_set_dma_mode(). Also remove no longer needed atiixp_dma_2_pio() helper. * SWDMA timings are not programmed by atiixp_set_dma_mode() and if SWDMA mode is chosen atiixp_dma_host_on() erroneously enables UDMA, just disable support for SWDMA modes for now. * Enable support for MWDMA0 mode. * Bump driver version. Acked-by: Sergei Shtylyov <sshtylyov@ru.mvista.com> Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
2007-10-16sc1200: always tune PIOBartlomiej Zolnierkiewicz
Acked-by: Sergei Shtylyov <sshtylyov@ru.mvista.com> Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
2007-10-16cs5530: always tune PIOBartlomiej Zolnierkiewicz
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
2007-10-16ide-cris: always tune PIOBartlomiej Zolnierkiewicz
Acked-by: Mikael Starvik <starvik@axis.com> Acked-by: Sergei Shtylyov <sshtylyov@ru.mvista.com> Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
2007-10-16slc90e66: always tune PIOBartlomiej Zolnierkiewicz
Acked-by: Sergei Shtylyov <sshtylyov@ru.mvista.com> Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
2007-10-16aec62xx: always tune PIOBartlomiej Zolnierkiewicz
Acked-by: Sergei Shtylyov <sshtylyov@ru.mvista.com> Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
2007-10-16sis5513: always tune PIOBartlomiej Zolnierkiewicz
* Always set ->autotune in init_hwif_sis5513(), this means practically no change in behavior since PIO was always tuned in ->ide_dma_check and >autotune was always set for ->dma_base == 0 case. * Bump driver version. Acked-by: Sergei Shtylyov <sshtylyov@ru.mvista.com> Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
2007-10-16sis5513: DMA setup fixesBartlomiej Zolnierkiewicz
* Add sis_ata133_get_base() helper function for obtaining the address of the drive control registers on chipset_family == ATA_133 chipsets. * Add three helper functions for programming PIO/MWDMA timings: - sis_ata16_program_timings() (for ATA_16/33/66/100a chipset families) - sis_ata100_program_timings() (for ATA_100/133a chipset families) - sis_ata133_program_timings() (for ATA_133 chipset family) MWDMA timings are taken from datasheets and they match ATA spec. * Add generic helper function sis_program_timings() and use it in ->set_pio_mode and ->set_dma_mode methods (previously the driver depended on BIOS to program the correct MWDMA timings). * Remove redundant !chipset_family check from init_hwif_sis5513() (init_chipset_sis5513() guarantees that we will never get here if chipset_family cannot be determined). * SWDMA seems to be unsupported by SiS chipsets (no info about SWDMA in datasheets and for SWDMA0 mode timing requirements are impossible to fulfill) so remove ->swdma_mask from init_hwif_sis5513() and handling of SWDMA modes from sis_set_dma_mode(). * Enable DMA support for chipset_family == ATA_16. * Bump driver version. Acked-by: Sergei Shtylyov <sshtylyov@ru.mvista.com> Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
2007-10-16hpt366: always tune PIOBartlomiej Zolnierkiewicz
Acked-by: Sergei Shtylyov <sshtylyov@ru.mvista.com> Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
2007-10-16ide-cs: Add additional id string (corsair, 1GB)Kristoffer Ericson
This patch adds id strings for Corsair 1GB (identified as Hyperstone Model1) inside legacy/ide-cs.c. It also includes some minor whitespace cleanups. Signed-off-by: Kristoffer Ericson <kristoffer.ericson@gmail.com> Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
2007-10-16ide: fix serverworks.c UDMA regressionTony Battersby
The patch described by the following excerpt from ChangeLog-2.6.22 makes it impossible to use UDMA on a Tyan S2707 motherboard (SvrWks CSB5): commit 2d5eaa6dd744a641e75503232a01f52d0768884c Author: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com> Date: Thu May 10 00:01:08 2007 +0200 ide: rework the code for selecting the best DMA transfer mode (v3) ... This one-line patch against 2.6.23 fixes the problem. Signed-off-by: Tony Battersby <tonyb@cybernetics.com> Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
2007-10-16IDE: sg chaining supportJens Axboe
Acked-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
2007-10-16remove ide_get_error_location()Adrian Bunk
Signed-off-by: Adrian Bunk <bunk@kernel.org> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
2007-10-16block: convert blkdev_issue_flush() to use empty barriersJens Axboe
Then we can get rid of ->issue_flush_fn() and all the driver private implementations of that. Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
2007-10-13alim15x3: remove redundant m5229_revision checkBartlomiej Zolnierkiewicz
init_dma_ali15x3() guarantees that hwif->dma_base will never be set for m5229_revision < 0x20 so remove redundant m5229_revision >= 0x20 check from init_hwif_common_ali15x3(). While at it remove incorrect comment. Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
2007-10-13sc1200: fix ->dma_base equal zero handlingBartlomiej Zolnierkiewicz
Set hwif->atapi_dma/{ultra,mwdma}_mask and drive->autodma after checking that ->dma_base exists. If ->dma_base is not set (== PCI BAR4 cannot be reserved) then DMA hooks shouldn't be initialized or bad things will happen. OTOH hwif->set_{pio,dma}_mode hooks should be set even if hwif->dma_base == 0. Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
2007-10-13cs5520: fix ->dma_base equal zero handlingBartlomiej Zolnierkiewicz
Set hwif->ide_dma_{check,on} and hwif->autodma to 1 after checking that ->dma_base exists. If ->dma_base is not set (== PCI BAR4 cannot be reserved) then DMA hooks shouldn't be initialized or bad things will happen. Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
2007-10-13sgiioc4: add missing ->dma_base checkBartlomiej Zolnierkiewicz
If ->dma_base is not set (== PCI BAR4 cannot be reserved) then DMA hooks shouldn't be initialized or bad things will happen. Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
2007-10-13cs5535: add missing ->dma_base checkBartlomiej Zolnierkiewicz
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: Sergei Shtylyov <sshtylyov@ru.mvista.com> Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
2007-10-13ide: remove CONFIG_IDEDMA_IVB config optionBartlomiej Zolnierkiewicz
Devices which don't set word 93 validation bit should be now handled by ide-iops.c::ivb_list[] and for debugging purposes cable detection can be completely overriden with "idex=ata66" parameter. Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
2007-10-13ide: change master/slave IDENTIFY orderBartlomiej Zolnierkiewicz
Need to probe slave device first to make it release PDIAG- (this is required for correct device side cable detection). Based on libata commit f31f0cc2f0b7527072d94d02da332d9bb8d7d94c. Thanks to Craig for testing this patch. Cc: Craig Block <chblock3@yahoo.com> Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
2007-10-13ide: move ide_config_drive_speed() calls to upper layers (take 2)Bartlomiej Zolnierkiewicz
* Convert {ide_hwif_t,ide_pci_device_t}->host_flag to be u16. * Add IDE_HFLAG_POST_SET_MODE host flag to indicate the need to program the host for the transfer mode after programming the device. Set it in au1xxx-ide, amd74xx, cs5530, cs5535, pdc202xx_new, sc1200, pmac and via82cxxx host drivers. * Add IDE_HFLAG_NO_SET_MODE host flag to indicate the need to completely skip programming of host/device for the transfer mode ("smart" hosts). Set it in it821x host driver and check it in ide_tune_dma(). * Add ide_set_pio_mode()/ide_set_dma_mode() helpers and convert all direct ->set_pio_mode/->speedproc users to use these helpers. * Move ide_config_drive_speed() calls from ->set_pio_mode/->speedproc methods to callers. * Rename ->speedproc method to ->set_dma_mode, make it void and update all implementations accordingly. * Update ide_set_xfer_rate() comments. * Unexport ide_config_drive_speed(). v2: * Fix issues noticed by Sergei: - export ide_set_dma_mode() instead of moving ->set_pio_mode abuse wrt to setting DMA modes from sc1200_set_pio_mode() to do_special() - check IDE_HFLAG_NO_SET_MODE in ide_tune_dma() - check for (hwif->set_pio_mode) == NULL in ide_set_pio_mode() - check for (hwif->set_dma_mode) == NULL in ide_set_dma_mode() - return -1 from ide_set_{pio,dma}_mode() if ->set_{pio,dma}_mode == NULL - don't set ->set_{pio,dma}_mode on it821x in "smart" mode - fix build problem in pmac.c - minor fixes in au1xxx-ide.c/cs5530.c/siimage.c - improve patch description Changes in behavior caused by this patch: - HDIO_SET_PIO_MODE ioctl would now return -ENOSYS for attempts to change PIO mode if it821x controller is in "smart" mode - removal of two debugging printk-s (from cs5530.c and sc1200.c) - transfer modes 0x00-0x07 passed from user space may be programmed twice on the device (not really an issue since 0x00 is not supported correctly by any host driver ATM, 0x01 is not supported at all and 0x02-0x07 are invalid) Acked-by: Sergei Shtylyov <sshtylyov@ru.mvista.com> Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
2007-10-13pdc202xx_new: check ide_config_drive_speed() return valueBartlomiej Zolnierkiewicz
Acked-by: Sergei Shtylyov <sshtylyov@ru.mvista.com> Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
2007-10-13cs5535: check ide_config_drive_speed() return valueBartlomiej Zolnierkiewicz
Acked-by: Sergei Shtylyov <sshtylyov@ru.mvista.com> Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
2007-10-13amd74xx/via82cxxx: check ide_config_drive_speed() return valueBartlomiej Zolnierkiewicz
* Check ide_config_drive_speed() return value. * While at also call ide_config_drive_speed() if the transfer mode is XFER_PIO_SLOW (this case happens iff the transfer mode has already been set on the device by ide-proc.c::set_xfer_rate()) and remove redundant setting of ->{init,current}_speed. * Bump driver version. Acked-by: Sergei Shtylyov <sshtylyov@ru.mvista.com> Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
2007-10-13au1xxx: fix au1xxx_set_pio_mode()Bartlomiej Zolnierkiewicz
Set transfer mode on the device before programming the host controller for the new timings (matches what auide_tune_chipset() is doing wrt DMA modes). Acked-by: Sergei Shtylyov <sshtylyov@ru.mvista.com> Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
2007-10-13icside: use ide_tune_dma()Bartlomiej Zolnierkiewicz
* Add "good DMA drives" hack for icside to ide-dma.c::ide_find_dma_mode() (in the long-term it should be either removed or generalized for all hosts). * Use ide_tune_dma() in icside.c::icside_dma_check(). This results in the following changes in behavior: - pre-EIDE SWDMA modes are now also respected - drive->autodma is checked instead of hwif->autodma (doesn't really matter as icside sets both to "1") * Make ide-dma.c::__ide_dma_good_drive() static and drop "__" prefix. Cc: Russell King <rmk@arm.linux.org.uk> Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
2007-10-13ide-pmac: fix PIO setup and enable autotuneBenjamin Herrenschmidt
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
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