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authorBartlomiej Zolnierkiewicz <bzolnier@gmail.com>2007-05-10 00:01:08 +0200
committerBartlomiej Zolnierkiewicz <bzolnier@gmail.com>2007-05-10 00:01:08 +0200
commit2d5eaa6dd744a641e75503232a01f52d0768884c (patch)
tree0736bd00ea3bd032d601d0a676c998cb043b877a /drivers/ide/pci/cs5535.c
parent18137207236285989dfc0ee7f929b954199228f3 (diff)
ide: rework the code for selecting the best DMA transfer mode (v3)
Depends on the "ide: fix UDMA/MWDMA/SWDMA masks" patch. * add ide_hwif_t.udma_filter hook for filtering UDMA mask (use it in alim15x3, hpt366, siimage and serverworks drivers) * add ide_max_dma_mode() for finding best DMA mode for the device (loosely based on some older libata-core.c code) * convert ide_dma_speed() users to use ide_max_dma_mode() * make ide_rate_filter() take "ide_drive_t *drive" as an argument instead of "u8 mode" and teach it to how to use UDMA mask to do filtering * use ide_rate_filter() in hpt366 driver * remove no longer needed ide_dma_speed() and *_ratemask() * unexport eighty_ninty_three() v2: * rename ->filter_udma_mask to ->udma_filter [ Suggested by Sergei Shtylyov <sshtylyov@ru.mvista.com>. ] v3: * updated for scc_pata driver (fixes XFER_UDMA_6 filtering for user-space originated transfer mode change requests when 100MHz clock is used) Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Diffstat (limited to 'drivers/ide/pci/cs5535.c')
-rw-r--r--drivers/ide/pci/cs5535.c20
1 files changed, 2 insertions, 18 deletions
diff --git a/drivers/ide/pci/cs5535.c b/drivers/ide/pci/cs5535.c
index 45f43efbf92..66a101e470d 100644
--- a/drivers/ide/pci/cs5535.c
+++ b/drivers/ide/pci/cs5535.c
@@ -127,20 +127,6 @@ static void cs5535_set_speed(ide_drive_t *drive, u8 speed)
}
}
-static u8 cs5535_ratemask(ide_drive_t *drive)
-{
- /* eighty93 will return 1 if it's 80core and capable of
- exceeding udma2, 0 otherwise. we need ratemask to set
- the max speed and if we can > udma2 then we return 2
- which selects speed_max as udma4 which is the 5535's max
- speed, and 1 selects udma2 which is the max for 40c */
- if (!eighty_ninty_three(drive))
- return 1;
-
- return 2;
-}
-
-
/****
* cs5535_set_drive - Configure the drive to the new speed
* @drive: Drive to set up
@@ -151,7 +137,7 @@ static u8 cs5535_ratemask(ide_drive_t *drive)
*/
static int cs5535_set_drive(ide_drive_t *drive, u8 speed)
{
- speed = ide_rate_filter(cs5535_ratemask(drive), speed);
+ speed = ide_rate_filter(drive, speed);
ide_config_drive_speed(drive, speed);
cs5535_set_speed(drive, speed);
@@ -180,9 +166,7 @@ static void cs5535_tuneproc(ide_drive_t *drive, u8 xferspeed)
static int cs5535_config_drive_for_dma(ide_drive_t *drive)
{
- u8 speed;
-
- speed = ide_dma_speed(drive, cs5535_ratemask(drive));
+ u8 speed = ide_max_dma_mode(drive);
/* If no DMA speed was available then let dma_check hit pio */
if (!speed) {