[PATCH] USB: EHCI workaround for NForce and mem > 2GB
NVidia reports (via Mark Overby) that some of their EHCI controllers
don't like certain data structure addresses beyond the 2GB mark.
He provided an earlier version of this patch.
Signed-off-by: David Brownell <[EMAIL PROTECTED]>
Signed-off-by: Greg Kroah-Hartman <[EMAIL PROTECTED]>
---
commit f7201c3dcd7799f2aa3d6ec427b194225360ecee
tree 1abe4c11c210f88de270e230a61d3e0d7e96b107
parent 10f6524a8ef1413a8cbd952673997013183fe2a9
author David Brownell <[EMAIL PROTECTED]> Fri, 02 Sep 2005 18:58:09 -0700
committer Greg Kroah-Hartman <[EMAIL PROTECTED]> Mon, 12 Sep 2005 12:23:43 -0700
drivers/usb/host/ehci-hcd.c | 17 +++++++++++++++++
1 files changed, 17 insertions(+), 0 deletions(-)
diff --git a/drivers/usb/host/ehci-hcd.c b/drivers/usb/host/ehci-hcd.c
--- a/drivers/usb/host/ehci-hcd.c
+++ b/drivers/usb/host/ehci-hcd.c
@@ -400,6 +400,23 @@ static int ehci_hc_reset (struct usb_hcd
return -EIO;
}
break;
+ case PCI_VENDOR_ID_NVIDIA:
+ /* NVidia reports that certain chips don't handle
+ * QH, ITD, or SITD addresses above 2GB. (But TD,
+ * data buffer, and periodic schedule are normal.)
+ */
+ switch (pdev->device) {
+ case 0x003c: /* MCP04 */
+ case 0x005b: /* CK804 */
+ case 0x00d8: /* CK8 */
+ case 0x00e8: /* CK8S */
+ if (pci_set_consistent_dma_mask(pdev,
+ DMA_31BIT_MASK) < 0)
+ ehci_warn (ehci, "can't enable NVidia "
+ "workaround for >2GB RAM\n");
+ break;
+ }
+ break;
}
/* optional debug port, normally in the first BAR */
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