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authorBartlomiej Zolnierkiewicz <bzolnier@gmail.com>2007-10-13 17:47:50 +0200
committerBartlomiej Zolnierkiewicz <bzolnier@gmail.com>2007-10-13 17:47:50 +0200
commit75d7d963e3dcf8a1410000ab246921709e276cd9 (patch)
treedec16e18a5848d351f8572d2418eea09312756c0 /drivers/ide/ide-dma.c
parent0b46ff2ea2d817dc7883b80cd4e05ce41cce9158 (diff)
downloadop-kernel-dev-75d7d963e3dcf8a1410000ab246921709e276cd9.zip
op-kernel-dev-75d7d963e3dcf8a1410000ab246921709e276cd9.tar.gz
icside: use ide_tune_dma()
* 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>
Diffstat (limited to 'drivers/ide/ide-dma.c')
-rw-r--r--drivers/ide/ide-dma.c23
1 files changed, 14 insertions, 9 deletions
diff --git a/drivers/ide/ide-dma.c b/drivers/ide/ide-dma.c
index 6000c08f..05781fa 100644
--- a/drivers/ide/ide-dma.c
+++ b/drivers/ide/ide-dma.c
@@ -169,6 +169,11 @@ ide_startstop_t ide_dma_intr (ide_drive_t *drive)
EXPORT_SYMBOL_GPL(ide_dma_intr);
+static int ide_dma_good_drive(ide_drive_t *drive)
+{
+ return ide_in_drive_list(drive->id, drive_whitelist);
+}
+
#ifdef CONFIG_BLK_DEV_IDEDMA_PCI
/**
* ide_build_sglist - map IDE scatter gather for DMA I/O
@@ -357,7 +362,7 @@ static int config_drive_for_dma (ide_drive_t *drive)
return 0;
/* Consult the list of known "good" drives */
- if (__ide_dma_good_drive(drive))
+ if (ide_dma_good_drive(drive))
return 0;
}
@@ -639,14 +644,6 @@ int __ide_dma_bad_drive (ide_drive_t *drive)
EXPORT_SYMBOL(__ide_dma_bad_drive);
-int __ide_dma_good_drive (ide_drive_t *drive)
-{
- struct hd_driveid *id = drive->id;
- return ide_in_drive_list(id, drive_whitelist);
-}
-
-EXPORT_SYMBOL(__ide_dma_good_drive);
-
static const u8 xfer_mode_bases[] = {
XFER_UDMA_0,
XFER_MW_DMA_0,
@@ -746,6 +743,14 @@ u8 ide_find_dma_mode(ide_drive_t *drive, u8 req_mode)
}
}
+ if (hwif->chipset == ide_acorn && mode == 0) {
+ /*
+ * is this correct?
+ */
+ if (ide_dma_good_drive(drive) && drive->id->eide_dma_time < 150)
+ mode = XFER_MW_DMA_1;
+ }
+
printk(KERN_DEBUG "%s: selected mode 0x%x\n", drive->name, mode);
return min(mode, req_mode);
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