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authorSergei Shtylyov <sshtylyov@ru.mvista.com>2007-08-10 20:58:46 +0400
committerJeff Garzik <jeff@garzik.org>2007-08-15 04:19:07 -0400
commitd44a65f7bb0dae0bcc78de336b55a75b30ec2d2a (patch)
tree22c2eb369022138b5da775c791e5126c7068d8b0 /drivers/ata/pata_hpt37x.c
parentbe456b77ffbd3983b5da8eff49a70a701333f68b (diff)
downloadlinux-d44a65f7bb0dae0bcc78de336b55a75b30ec2d2a.tar.bz2
pata_hpt37x: actually clock HPT374 with 50 MHz DPLL (take 2)
The DPLL tuning code always set up it for 66 MHz due to wrong UltraDMA mask including mode 5 used to check for the necessity of 66 MHz clocking -- this caused 66 MHz clock to be used for HPT374 chip that does not tolerate it. While fixing this, also remove PLL mode from the TODO list -- I don't think it's still a relevant item. Signed-off-by: Sergei Shtylyov <sshtylyov@ru.mvista.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
Diffstat (limited to 'drivers/ata/pata_hpt37x.c')
-rw-r--r--drivers/ata/pata_hpt37x.c12
1 files changed, 4 insertions, 8 deletions
diff --git a/drivers/ata/pata_hpt37x.c b/drivers/ata/pata_hpt37x.c
index 84d9c5568567..96bbe7c39bee 100644
--- a/drivers/ata/pata_hpt37x.c
+++ b/drivers/ata/pata_hpt37x.c
@@ -8,12 +8,10 @@
* Copyright (C) 1999-2003 Andre Hedrick <andre@linux-ide.org>
* Portions Copyright (C) 2001 Sun Microsystems, Inc.
* Portions Copyright (C) 2003 Red Hat Inc
- * Portions Copyright (C) 2005-2006 MontaVista Software, Inc.
+ * Portions Copyright (C) 2005-2007 MontaVista Software, Inc.
*
* TODO
- * PLL mode
- * Look into engine reset on timeout errors. Should not be
- * required.
+ * Look into engine reset on timeout errors. Should not be required.
*/
#include <linux/kernel.h>
@@ -26,7 +24,7 @@
#include <linux/libata.h>
#define DRV_NAME "pata_hpt37x"
-#define DRV_VERSION "0.6.7"
+#define DRV_VERSION "0.6.8"
struct hpt_clock {
u8 xfer_speed;
@@ -1092,9 +1090,7 @@ static int hpt37x_init_one(struct pci_dev *dev, const struct pci_device_id *id)
int dpll, adjust;
/* Compute DPLL */
- dpll = 2;
- if (port->udma_mask & 0xE0)
- dpll = 3;
+ dpll = (port->udma_mask & 0xC0) ? 3 : 2;
f_low = (MHz[clock_slot] * 48) / MHz[dpll];
f_high = f_low + 2;