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Subject[PATCH] [21/275] USB: EHCI: ASPM quirk of ISOC on AMD Hudson
Date
2.6.35-longterm review patch.  If anyone has any objections, please let me know.

------------------
From: Alex He <alex.he@amd.com>

commit baab93afc2844b68d57b0dcca5e1d34c5d7cf411 upstream.

AMD Hudson also needs the same ASPM quirk as SB800

Signed-off-by: Alex He <alex.he@amd.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Signed-off-by: Andi Kleen <ak@linux.intel.com>

---
drivers/usb/host/ehci-pci.c | 33 ++++++++++++++++++++-------------
1 file changed, 20 insertions(+), 13 deletions(-)

Index: linux-2.6.35.y/drivers/usb/host/ehci-pci.c
===================================================================
--- linux-2.6.35.y.orig/drivers/usb/host/ehci-pci.c 2011-03-29 23:02:58.277344248 -0700
+++ linux-2.6.35.y/drivers/usb/host/ehci-pci.c 2011-03-29 23:02:58.654334603 -0700
@@ -41,28 +41,35 @@
return 0;
}

-static int ehci_quirk_amd_SB800(struct ehci_hcd *ehci)
+static int ehci_quirk_amd_hudson(struct ehci_hcd *ehci)
{
struct pci_dev *amd_smbus_dev;
u8 rev = 0;

amd_smbus_dev = pci_get_device(PCI_VENDOR_ID_ATI, 0x4385, NULL);
- if (!amd_smbus_dev)
- return 0;
-
- pci_read_config_byte(amd_smbus_dev, PCI_REVISION_ID, &rev);
- if (rev < 0x40) {
- pci_dev_put(amd_smbus_dev);
- amd_smbus_dev = NULL;
- return 0;
+ if (amd_smbus_dev) {
+ pci_read_config_byte(amd_smbus_dev, PCI_REVISION_ID, &rev);
+ if (rev < 0x40) {
+ pci_dev_put(amd_smbus_dev);
+ amd_smbus_dev = NULL;
+ return 0;
+ }
+ } else {
+ amd_smbus_dev = pci_get_device(PCI_VENDOR_ID_AMD, 0x780b, NULL);
+ if (!amd_smbus_dev)
+ return 0;
+ pci_read_config_byte(amd_smbus_dev, PCI_REVISION_ID, &rev);
+ if (rev < 0x11 || rev > 0x18) {
+ pci_dev_put(amd_smbus_dev);
+ amd_smbus_dev = NULL;
+ return 0;
+ }
}

if (!amd_nb_dev)
amd_nb_dev = pci_get_device(PCI_VENDOR_ID_AMD, 0x1510, NULL);
- if (!amd_nb_dev)
- ehci_err(ehci, "QUIRK: unable to get AMD NB device\n");

- ehci_info(ehci, "QUIRK: Enable AMD SB800 L1 fix\n");
+ ehci_info(ehci, "QUIRK: Enable exception for AMD Hudson ASPM\n");

pci_dev_put(amd_smbus_dev);
amd_smbus_dev = NULL;
@@ -128,7 +135,7 @@
/* cache this readonly data; minimize chip reads */
ehci->hcs_params = ehci_readl(ehci, &ehci->caps->hcs_params);

- if (ehci_quirk_amd_SB800(ehci))
+ if (ehci_quirk_amd_hudson(ehci))
ehci->amd_l1_fix = 1;

retval = ehci_halt(ehci);

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