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authorBartlomiej Zolnierkiewicz <bzolnier@gmail.com>2007-10-13 17:47:49 +0200
committerBartlomiej Zolnierkiewicz <bzolnier@gmail.com>2007-10-13 17:47:49 +0200
commitfd553ce86893e0a54ec0d07d1f1d241f2fb2aef3 (patch)
tree53de207c1a5af5d5882157b092af8c560477ef6f /drivers/ide/ppc/pmac.c
parent78103940e4f8084de2bf8ca81c4bd09b48e9ac16 (diff)
ide-pmac: remove pmac_ide_{m,u}dma_enable() (take 2)
* Fix pmac_ide_dma_check() to use pmac_ide_tune_chipset() and remove no longer necessary pmac_ide_{m,u}dma_enable(). * While at it remove some dead code from pmac_ide_dma_check() (leftovers from conversion to use ide_max_dma_mode()). There should be no functionality changes caused by this patch. v2: * Fix compile by replacing "id" with "drive->id" in pmac_ide_dma_check() (Noticed by Ben). Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Diffstat (limited to 'drivers/ide/ppc/pmac.c')
-rw-r--r--drivers/ide/ppc/pmac.c102
1 files changed, 4 insertions, 98 deletions
diff --git a/drivers/ide/ppc/pmac.c b/drivers/ide/ppc/pmac.c
index d6a1a9be58a..ad58c7ecf85 100644
--- a/drivers/ide/ppc/pmac.c
+++ b/drivers/ide/ppc/pmac.c
@@ -1671,108 +1671,19 @@ pmac_ide_destroy_dmatable (ide_drive_t *drive)
}
/*
- * Pick up best MDMA timing for the drive and apply it
- */
-static int
-pmac_ide_mdma_enable(ide_drive_t *drive, u16 mode)
-{
- ide_hwif_t *hwif = HWIF(drive);
- pmac_ide_hwif_t* pmif = (pmac_ide_hwif_t *)hwif->hwif_data;
- u32 *timings, *timings2;
- u32 timing_local[2];
- int ret;
-
- /* which drive is it ? */
- timings = &pmif->timings[drive->select.b.unit & 0x01];
- timings2 = &pmif->timings[(drive->select.b.unit & 0x01) + 2];
-
- /* Copy timings to local image */
- timing_local[0] = *timings;
- timing_local[1] = *timings2;
-
- /* Calculate controller timings */
- set_timings_mdma(drive, pmif->kind, &timing_local[0], &timing_local[1], mode);
-
- /* Set feature on drive */
- printk(KERN_INFO "%s: Enabling MultiWord DMA %d\n", drive->name, mode & 0xf);
- ret = pmac_ide_do_setfeature(drive, mode);
- if (ret) {
- printk(KERN_WARNING "%s: Failed !\n", drive->name);
- return 0;
- }
-
- /* Apply timings to controller */
- *timings = timing_local[0];
- *timings2 = timing_local[1];
-
- return 1;
-}
-
-/*
- * Pick up best UDMA timing for the drive and apply it
- */
-static int
-pmac_ide_udma_enable(ide_drive_t *drive, u16 mode)
-{
- ide_hwif_t *hwif = HWIF(drive);
- pmac_ide_hwif_t* pmif = (pmac_ide_hwif_t *)hwif->hwif_data;
- u32 *timings, *timings2;
- u32 timing_local[2];
- int ret;
-
- /* which drive is it ? */
- timings = &pmif->timings[drive->select.b.unit & 0x01];
- timings2 = &pmif->timings[(drive->select.b.unit & 0x01) + 2];
-
- /* Copy timings to local image */
- timing_local[0] = *timings;
- timing_local[1] = *timings2;
-
- /* Calculate timings for interface */
- if (pmif->kind == controller_un_ata6
- || pmif->kind == controller_k2_ata6)
- ret = set_timings_udma_ata6( &timing_local[0],
- &timing_local[1],
- mode);
- else if (pmif->kind == controller_sh_ata6)
- ret = set_timings_udma_shasta( &timing_local[0],
- &timing_local[1],
- mode);
- else
- ret = set_timings_udma_ata4(&timing_local[0], mode);
- if (ret)
- return 0;
-
- /* Set feature on drive */
- printk(KERN_INFO "%s: Enabling Ultra DMA %d\n", drive->name, mode & 0x0f);
- ret = pmac_ide_do_setfeature(drive, mode);
- if (ret) {
- printk(KERN_WARNING "%s: Failed !\n", drive->name);
- return 0;
- }
-
- /* Apply timings to controller */
- *timings = timing_local[0];
- *timings2 = timing_local[1];
-
- return 1;
-}
-
-/*
* Check what is the best DMA timing setting for the drive and
* call appropriate functions to apply it.
*/
static int
pmac_ide_dma_check(ide_drive_t *drive)
{
- struct hd_driveid *id = drive->id;
- ide_hwif_t *hwif = HWIF(drive);
int enable = 1;
+
drive->using_dma = 0;
if (drive->media == ide_floppy)
enable = 0;
- if (((id->capability & 1) == 0) && !__ide_dma_good_drive(drive))
+ if ((drive->id->capability & 1) == 0 && !__ide_dma_good_drive(drive))
enable = 0;
if (__ide_dma_bad_drive(drive))
enable = 0;
@@ -1780,13 +1691,8 @@ pmac_ide_dma_check(ide_drive_t *drive)
if (enable) {
u8 mode = ide_max_dma_mode(drive);
- if (mode >= XFER_UDMA_0)
- drive->using_dma = pmac_ide_udma_enable(drive, mode);
- else if (mode >= XFER_MW_DMA_0)
- drive->using_dma = pmac_ide_mdma_enable(drive, mode);
-
- /* Apply settings to controller */
- pmac_ide_do_update_timings(drive);
+ if (mode && pmac_ide_tune_chipset(drive, mode) == 0)
+ drive->using_dma = 1;
}
return 0;
}