Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit cf5792d2 authored by Alan Cox's avatar Alan Cox Committed by Jeff Garzik
Browse files

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: default avatarAlan Cox <alan@redhat.com>
Tested-by: default avatarFrancis Russell <FrancisRussell@btinternet.com>
Signed-off-by: default avatarJeff Garzik <jeff@garzik.org>
parent 6dffaf61

drivers/ata/pata_via.c

+29 −0
Original line number Diff line number Diff line
@@ -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;