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authorAlan Cox <alan@lxorguk.ukuu.org.uk>2006-10-10 23:28:11 +0200
committerJeff Garzik <jeff@garzik.org>2006-12-02 04:40:25 +0100
commitfc085150b491bfc186efbca90a14cf907a3060a9 (patch)
treeb5bf8b6eb6d0dabd8699e6b41c239619590659e2 /drivers
parent[PATCH] pci_module_init-convertion-in-ata_genericc fix (diff)
downloadlinux-fc085150b491bfc186efbca90a14cf907a3060a9.tar.xz
linux-fc085150b491bfc186efbca90a14cf907a3060a9.zip
[PATCH] libata: add 40pin "short" cable support, honour drive side speed detection
[deweerdt@free.fr: build fix] Signed-off-by: Alan Cox <alan@redhat.com> Signed-off-by: Frederik Deweerdt <deweerdt@free.fr> Cc: Tejun Heo <htejun@gmail.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Jeff Garzik <jeff@garzik.org>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/ata/ata_piix.c31
-rw-r--r--drivers/ata/libata-core.c7
-rw-r--r--drivers/ata/pata_ali.c2
3 files changed, 38 insertions, 2 deletions
diff --git a/drivers/ata/ata_piix.c b/drivers/ata/ata_piix.c
index 720174d628fa..14b726b9f985 100644
--- a/drivers/ata/ata_piix.c
+++ b/drivers/ata/ata_piix.c
@@ -93,7 +93,7 @@
#include <linux/libata.h>
#define DRV_NAME "ata_piix"
-#define DRV_VERSION "2.00ac6"
+#define DRV_VERSION "2.00ac7"
enum {
PIIX_IOCFG = 0x54, /* IDE I/O configuration register */
@@ -571,6 +571,23 @@ module_param(force_pcs, int, 0444);
MODULE_PARM_DESC(force_pcs, "force honoring or ignoring PCS to work around "
"device mis-detection (0=default, 1=ignore PCS, 2=honor PCS)");
+struct ich_laptop {
+ u16 device;
+ u16 subvendor;
+ u16 subdevice;
+};
+
+/*
+ * List of laptops that use short cables rather than 80 wire
+ */
+
+static const struct ich_laptop ich_laptop[] = {
+ /* devid, subvendor, subdev */
+ { 0x27DF, 0x0005, 0x0280 }, /* ICH7 on Acer 5602WLMi */
+ /* end marker */
+ { 0, }
+};
+
/**
* piix_pata_cbl_detect - Probe host controller cable detect info
* @ap: Port for which cable detect info is desired
@@ -585,12 +602,24 @@ MODULE_PARM_DESC(force_pcs, "force honoring or ignoring PCS to work around "
static void ich_pata_cbl_detect(struct ata_port *ap)
{
struct pci_dev *pdev = to_pci_dev(ap->host->dev);
+ const struct ich_laptop *lap = &ich_laptop[0];
u8 tmp, mask;
/* no 80c support in host controller? */
if ((ap->udma_mask & ~ATA_UDMA_MASK_40C) == 0)
goto cbl40;
+ /* Check for specials - Acer Aspire 5602WLMi */
+ while (lap->device) {
+ if (lap->device == pdev->device &&
+ lap->subvendor == pdev->subsystem_vendor &&
+ lap->subdevice == pdev->subsystem_device) {
+ ap->cbl = ATA_CBL_PATA40_SHORT;
+ return;
+ }
+ lap++;
+ }
+
/* check BIOS cable detect results */
mask = ap->port_no == 0 ? PIIX_80C_PRI : PIIX_80C_SEC;
pci_read_config_byte(pdev, PIIX_IOCFG, &tmp);
diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c
index 915a55a6cc14..b896119cccd3 100644
--- a/drivers/ata/libata-core.c
+++ b/drivers/ata/libata-core.c
@@ -3119,6 +3119,13 @@ static void ata_dev_xfermask(struct ata_device *dev)
*/
if (ap->cbl == ATA_CBL_PATA40)
xfer_mask &= ~(0xF8 << ATA_SHIFT_UDMA);
+ /* Apply drive side cable rule. Unknown or 80 pin cables reported
+ * host side are checked drive side as well. Cases where we know a
+ * 40wire cable is used safely for 80 are not checked here.
+ */
+ if (ata_drive_40wire(dev->id) && (ap->cbl == ATA_CBL_PATA_UNK || ap->cbl == ATA_CBL_PATA80))
+ xfer_mask &= ~(0xF8 << ATA_SHIFT_UDMA);
+
xfer_mask &= ata_pack_xfermask(dev->pio_mask,
dev->mwdma_mask, dev->udma_mask);
diff --git a/drivers/ata/pata_ali.c b/drivers/ata/pata_ali.c
index 64eed99f6814..e6d2b840e870 100644
--- a/drivers/ata/pata_ali.c
+++ b/drivers/ata/pata_ali.c
@@ -78,7 +78,7 @@ static int ali_c2_cable_detect(struct ata_port *ap)
implement the detect logic */
if (ali_cable_override(pdev))
- return ATA_CBL_PATA80;
+ return ATA_CBL_PATA40_SHORT;
/* Host view cable detect 0x4A bit 0 primary bit 1 secondary
Bit set for 40 pin */