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-rw-r--r--drivers/pci/quirks.c30
1 files changed, 30 insertions, 0 deletions
diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c
index 3a4f49f4eff..f28ebdd3958 100644
--- a/drivers/pci/quirks.c
+++ b/drivers/pci/quirks.c
@@ -1098,6 +1098,23 @@ static void __init quirk_alder_ioapic(struct pci_dev *pdev)
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_EESSC, quirk_alder_ioapic );
#endif
+enum ide_combined_type { COMBINED = 0, IDE = 1, LIBATA = 2 };
+/* Defaults to combined */
+static enum ide_combined_type combined_mode;
+
+static int __init combined_setup(char *str)
+{
+ if (!strncmp(str, "ide", 3))
+ combined_mode = IDE;
+ else if (!strncmp(str, "libata", 6))
+ combined_mode = LIBATA;
+ else /* "combined" or anything else defaults to old behavior */
+ combined_mode = COMBINED;
+
+ return 1;
+}
+__setup("combined_mode=", combined_setup);
+
#ifdef CONFIG_SCSI_SATA_INTEL_COMBINED
static void __devinit quirk_intel_ide_combined(struct pci_dev *pdev)
{
@@ -1164,6 +1181,19 @@ static void __devinit quirk_intel_ide_combined(struct pci_dev *pdev)
if (prog & comb)
return;
+ /* Don't reserve any so the IDE driver can get them (but only if
+ * combined_mode=ide).
+ */
+ if (combined_mode == IDE)
+ return;
+
+ /* Grab them both for libata if combined_mode=libata. */
+ if (combined_mode == LIBATA) {
+ request_region(0x1f0, 8, "libata"); /* port 0 */
+ request_region(0x170, 8, "libata"); /* port 1 */
+ return;
+ }
+
/* SATA port is in legacy mode. Reserve port so that
* IDE driver does not attempt to use it. If request_region
* fails, it will be obvious at boot time, so we don't bother