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authorLibin Yang <Libin.Yang@amd.com>2008-08-08 15:03:31 +0800
committerGreg Kroah-Hartman <gregkh@suse.de>2008-08-13 17:32:58 -0700
commitab1666c1364a209e6141d7c14e47a42b5f00eca2 (patch)
treee71ab24f20b36762d9b6b2fc9565bdd848cbdd97 /drivers/usb/host/ohci.h
parente12cc34527dcd945597c860c25aba92883a4a6a4 (diff)
USB: quirk PLL power down mode
On some AMD 700 series southbridges, ISO OUT transfers (such as audio playback through speakers) on the USB OHCI controller may be corrupted when an A-Link express power saving feature is active. PLL power down mode in conjunction with link power management feature L1 being enabled is the bad combination ... this patch prevents them from being enabled when ISO transfers are pending. Signed-off-by: Crane Cai <crane.cai@amd.com> Signed-off-by: Libin Yang <libin.yang@amd.com> Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/usb/host/ohci.h')
-rw-r--r--drivers/usb/host/ohci.h9
1 files changed, 9 insertions, 0 deletions
diff --git a/drivers/usb/host/ohci.h b/drivers/usb/host/ohci.h
index df5a8037dba..faf622eafce 100644
--- a/drivers/usb/host/ohci.h
+++ b/drivers/usb/host/ohci.h
@@ -401,6 +401,7 @@ struct ohci_hcd {
#define OHCI_QUIRK_NEC 0x40 /* lost interrupts */
#define OHCI_QUIRK_FRAME_NO 0x80 /* no big endian frame_no shift */
#define OHCI_QUIRK_HUB_POWER 0x100 /* distrust firmware power/oc setup */
+#define OHCI_QUIRK_AMD_ISO 0x200 /* ISO transfers*/
// there are also chip quirks/bugs in init logic
struct work_struct nec_work; /* Worker for NEC quirk */
@@ -428,6 +429,10 @@ static inline int quirk_zfmicro(struct ohci_hcd *ohci)
{
return ohci->flags & OHCI_QUIRK_ZFMICRO;
}
+static inline int quirk_amdiso(struct ohci_hcd *ohci)
+{
+ return ohci->flags & OHCI_QUIRK_AMD_ISO;
+}
#else
static inline int quirk_nec(struct ohci_hcd *ohci)
{
@@ -437,6 +442,10 @@ static inline int quirk_zfmicro(struct ohci_hcd *ohci)
{
return 0;
}
+static inline int quirk_amdiso(struct ohci_hcd *ohci)
+{
+ return 0;
+}
#endif
/* convert between an hcd pointer and the corresponding ohci_hcd */