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| author | Alan Cox <alan@lxorguk.ukuu.org.uk> | 2007-05-23 22:39:01 +0100 |
|---|---|---|
| committer | Jeff Garzik <jeff@garzik.org> | 2007-05-24 20:34:48 -0400 |
| commit | cf5792d20cdc9a88abf9984a2224f57de1952926 (patch) | |
| tree | c887e7b38d139f08c3d4204945dceda1afa9a651 /drivers/ata/pata_via.c | |
| parent | 6dffaf61e22d21e539ae7e30c2e33e41230c3d52 (diff) | |
| download | lwn-cf5792d20cdc9a88abf9984a2224f57de1952926.tar.gz lwn-cf5792d20cdc9a88abf9984a2224f57de1952926.zip | |
pata_via: Handle laptops via DMI
Oh the joy of saving a fraction of a cent using short 40 wire cables and
not faking 80wire
Teach the VIA driver that there are some systems we need to know are
magically wired for high speeds.
Signed-off-by: Alan Cox <alan@redhat.com>
Tested-by: Francis Russell <FrancisRussell@btinternet.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
Diffstat (limited to 'drivers/ata/pata_via.c')
| -rw-r--r-- | drivers/ata/pata_via.c | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/drivers/ata/pata_via.c b/drivers/ata/pata_via.c index e4c71f76bd55..708dfc0c716b 100644 --- a/drivers/ata/pata_via.c +++ b/drivers/ata/pata_via.c @@ -60,6 +60,7 @@ #include <linux/delay.h> #include <scsi/scsi_host.h> #include <linux/libata.h> +#include <linux/dmi.h> #define DRV_NAME "pata_via" #define DRV_VERSION "0.3.1" @@ -122,6 +123,31 @@ static const struct via_isa_bridge { { NULL } }; + +/* + * Cable special cases + */ + +static struct dmi_system_id cable_dmi_table[] = { + { + .ident = "Acer Ferrari 3400", + .matches = { + DMI_MATCH(DMI_BOARD_VENDOR, "Acer,Inc."), + DMI_MATCH(DMI_BOARD_NAME, "Ferrari 3400"), + }, + }, + { } +}; + +static int via_cable_override(struct pci_dev *pdev) +{ + /* Systems by DMI */ + if (dmi_check_system(cable_dmi_table)) + return 1; + return 0; +} + + /** * via_cable_detect - cable detection * @ap: ATA port @@ -139,6 +165,9 @@ static int via_cable_detect(struct ata_port *ap) { struct pci_dev *pdev = to_pci_dev(ap->host->dev); u32 ata66; + if (via_cable_override(pdev)) + return ATA_CBL_PATA40_SHORT; + /* Early chips are 40 wire */ if ((config->flags & VIA_UDMA) < VIA_UDMA_66) return ATA_CBL_PATA40; |