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nexedi
linux
Commits
2dd84413
Commit
2dd84413
authored
Mar 08, 2004
by
Jeff Garzik
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[libata ata_piix] Make sure annoying BIOSen don't disable our interrupts
parent
e37388ca
Changes
1
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1 changed file
with
27 additions
and
4 deletions
+27
-4
drivers/scsi/ata_piix.c
drivers/scsi/ata_piix.c
+27
-4
No files found.
drivers/scsi/ata_piix.c
View file @
2dd84413
...
...
@@ -28,12 +28,13 @@
#include <linux/libata.h>
#define DRV_NAME "ata_piix"
#define DRV_VERSION "1.0
0
"
#define DRV_VERSION "1.0
1
"
enum
{
PIIX_IOCFG
=
0x54
,
/* IDE I/O configuration register */
ICH5_PCS
=
0x92
,
/* port control and status */
PIIX_FLAG_CHECKINTR
=
(
1
<<
29
),
/* make sure PCI INTx enabled */
PIIX_FLAG_COMBINED
=
(
1
<<
30
),
/* combined mode possible */
PIIX_COMB_PRI
=
(
1
<<
0
),
/* combined mode, PATA primary */
...
...
@@ -163,7 +164,8 @@ static struct ata_port_info piix_port_info[] = {
/* ich5_pata */
{
.
sht
=
&
piix_sht
,
.
host_flags
=
ATA_FLAG_SLAVE_POSS
|
ATA_FLAG_SRST
,
.
host_flags
=
ATA_FLAG_SLAVE_POSS
|
ATA_FLAG_SRST
|
PIIX_FLAG_CHECKINTR
,
.
pio_mask
=
0x03
,
/* pio3-4 */
.
udma_mask
=
ATA_UDMA_MASK_40C
,
/* FIXME: cbl det */
.
port_ops
=
&
piix_pata_ops
,
...
...
@@ -172,8 +174,8 @@ static struct ata_port_info piix_port_info[] = {
/* ich5_sata */
{
.
sht
=
&
piix_sht
,
.
host_flags
=
ATA_FLAG_SATA
|
PIIX_FLAG_COMBINED
|
ATA_FLAG_SRST
,
.
host_flags
=
ATA_FLAG_SATA
|
ATA_FLAG_SRST
|
PIIX_FLAG_COMBINED
|
PIIX_FLAG_CHECKINTR
,
.
pio_mask
=
0x03
,
/* pio3-4 */
.
udma_mask
=
0x7f
,
/* udma0-6 ; FIXME */
.
port_ops
=
&
piix_sata_ops
,
...
...
@@ -518,6 +520,18 @@ static void piix_probe_combined (struct pci_dev *pdev, unsigned int *mask)
*
mask
|=
PIIX_COMB_PRI
;
}
/* move to PCI layer, integrate w/ MSI stuff */
static
void
pci_enable_intx
(
struct
pci_dev
*
pdev
)
{
u16
pci_command
;
pci_read_config_word
(
pdev
,
PCI_COMMAND
,
&
pci_command
);
if
(
pci_command
&
PCI_COMMAND_INTX_DISABLE
)
{
pci_command
&=
~
PCI_COMMAND_INTX_DISABLE
;
pci_write_config_word
(
pdev
,
PCI_COMMAND
,
pci_command
);
}
}
/**
* piix_init_one - Register PIIX ATA PCI device with kernel services
* @pdev: PCI device to register
...
...
@@ -552,6 +566,15 @@ static int piix_init_one (struct pci_dev *pdev, const struct pci_device_id *ent)
if
(
port_info
[
0
]
->
host_flags
&
PIIX_FLAG_COMBINED
)
piix_probe_combined
(
pdev
,
&
combined
);
/* On ICH5, some BIOSen disable the interrupt using the
* PCI_COMMAND_INTX_DISABLE bit added in PCI 2.3.
* On ICH6, this bit has the same effect, but only when
* MSI is disabled (and it is disabled, as we don't use
* message-signalled interrupts currently).
*/
if
(
port_info
[
0
]
->
host_flags
&
PIIX_FLAG_CHECKINTR
)
pci_enable_intx
(
pdev
);
if
(
combined
&
PIIX_COMB_PRI
)
sata_comb
=
1
;
else
if
(
combined
&
PIIX_COMB_SEC
)
...
...
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