diff options
| author | erictian <erictian@6f19259b-4bc3-4df7-8a09-765794883524> | 2013-03-29 09:32:55 +0000 |
|---|---|---|
| committer | erictian <erictian@6f19259b-4bc3-4df7-8a09-765794883524> | 2013-03-29 09:32:55 +0000 |
| commit | 71619ac2b577412cf43d543928489cdf34bbd844 (patch) | |
| tree | 488cdda24a824f24cd8a8e7ba235ad90cea4d495 /MdeModulePkg/Bus/Usb/UsbBusDxe/UsbBus.h | |
| parent | 20bcb757d2d85f59c749e004e580bc2e52a96459 (diff) | |
| download | edk2-platforms-71619ac2b577412cf43d543928489cdf34bbd844.tar.xz | |
MdeMdeModulePkg/Usb: two tunings for better device identification behind hub
1.enlarge the recovery time from 10ms to 20ms after port reset to make set address request success for better device compatibility.
2.another enhancement is to use RESET_C bit rather than RESET bit to judge if hub reset port operation is done.
Signed-off-by: Feng Tian <feng.tian@intel.com>
Reviewed-by: Elvin Li <elvin.li@intel.com>
git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@14227 6f19259b-4bc3-4df7-8a09-765794883524
Diffstat (limited to 'MdeModulePkg/Bus/Usb/UsbBusDxe/UsbBus.h')
| -rw-r--r-- | MdeModulePkg/Bus/Usb/UsbBusDxe/UsbBus.h | 11 |
1 files changed, 10 insertions, 1 deletions
diff --git a/MdeModulePkg/Bus/Usb/UsbBusDxe/UsbBus.h b/MdeModulePkg/Bus/Usb/UsbBusDxe/UsbBus.h index 094aea21cd..d503a278a4 100644 --- a/MdeModulePkg/Bus/Usb/UsbBusDxe/UsbBus.h +++ b/MdeModulePkg/Bus/Usb/UsbBusDxe/UsbBus.h @@ -99,10 +99,19 @@ typedef struct _USB_HUB_API USB_HUB_API; // [USB20-7.1.7.5, it says 10ms for hub and 50ms for
// root hub]
//
-#define USB_SET_PORT_RESET_STALL (10 * USB_BUS_1_MILLISECOND)
+// According to USB2.0, Chapter 11.5.1.5 Resetting,
+// the worst case for TDRST is 20ms
+//
+#define USB_SET_PORT_RESET_STALL (20 * USB_BUS_1_MILLISECOND)
#define USB_SET_ROOT_PORT_RESET_STALL (50 * USB_BUS_1_MILLISECOND)
//
+// Wait for port recovery to accept SetAddress, refers to specification
+// [USB20-7.1.7.5, it says 10 ms for TRSTRCY]
+//
+#define USB_SET_PORT_RECOVERY_STALL (10 * USB_BUS_1_MILLISECOND)
+
+//
// Wait for clear roothub port reset, set by experience
//
#define USB_CLR_ROOT_PORT_RESET_STALL (20 * USB_BUS_1_MILLISECOND)
|