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Introduce a new loader tunable "hw.ata.ata_dma_check_80pin", defaulting to 1.

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This can be used to disable the 80pin cable check on systems which forget to
set the bit -- such as certain laptops and Soekris boards.

PR:		kern/114605 (somewhat reworked)
Submitted by:	marck
MFC after:	1 week
This commit is contained in:
Philip Paeps 2008-08-15 10:55:11 +00:00
parent 5bfcb0b9b4
commit 854d77bdd6
3 changed files with 13 additions and 1 deletions
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5
sys/dev/ata/ata-all.c
View File

@ -75,6 +75,7 @@ uma_zone_t ata_request_zone;
uma_zone_t ata_composite_zone;
int ata_wc = 1;
int ata_setmax = 0;
int ata_dma_check_80pin = 1;
/* local vars */
static int ata_dma = 1;
@ -85,6 +86,10 @@ SYSCTL_NODE(_hw, OID_AUTO, ata, CTLFLAG_RD, 0, "ATA driver parameters");
TUNABLE_INT("hw.ata.ata_dma", &ata_dma);
SYSCTL_INT(_hw_ata, OID_AUTO, ata_dma, CTLFLAG_RDTUN, &ata_dma, 0,
"ATA disk DMA mode control");
TUNABLE_INT("hw.ata.ata_dma_check_80pin", &ata_dma_check_80pin);
SYSCTL_INT(_hw_ata, OID_AUTO, ata_dma_check_80pin,
CTLFLAG_RDTUN, &ata_dma_check_80pin, 1,
"Check for 80pin cable before setting ATA DMA mode");
TUNABLE_INT("hw.ata.atapi_dma", &atapi_dma);
SYSCTL_INT(_hw_ata, OID_AUTO, atapi_dma, CTLFLAG_RDTUN, &atapi_dma, 0,
"ATAPI device DMA mode control");

3
sys/dev/ata/ata-all.h
View File

@ -544,7 +544,8 @@ extern struct intr_config_hook *ata_delayed_attach;
extern devclass_t ata_devclass;
extern int ata_wc;
extern int ata_setmax;
extern int ata_dma_check_80pin;
/* public prototypes */
/* ata-all.c: */
int ata_probe(device_t dev);

6
sys/dev/ata/ata-chipset.c
View File

@ -6392,6 +6392,12 @@ ata_check_80pin(device_t dev, int mode)
{
struct ata_device *atadev = device_get_softc(dev);
if (!ata_dma_check_80pin) {
if (bootverbose)
device_printf(dev, "Skipping 80pin cable check\n");
return mode;
}
if (mode > ATA_UDMA2 && !(atadev->param.hwres & ATA_CABLE_ID)) {
ata_print_cable(dev, "device");
mode = ATA_UDMA2;