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MdeModulePkg/UsbBusDxe: Timing tunning for better boot performance. 

Signed-off-by: Feng Tian <feng.tian@intel.com>
Reviewed-by: Michael Kinney <michael.d.kinney@intel.com>

git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@13809 6f19259b-4bc3-4df7-8a09-765794883524
This commit is contained in:
erictian 2012-10-10 02:46:06 +00:00
parent fa8801f5fc
commit c843ef6796
3 changed files with 13 additions and 8 deletions
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10
MdeModulePkg/Bus/Usb/UsbBusDxe/UsbBus.h
View File

@ -60,10 +60,10 @@ typedef struct _USB_HUB_API USB_HUB_API;
//
// Roothub and hub's polling interval, set by experience,
// The unit of roothub is 100us, means 1s as interval, and
// The unit of roothub is 100us, means 100ms as interval, and
// the unit of hub is 1ms, means 64ms as interval.
//
#define USB_ROOTHUB_POLL_INTERVAL (1000 * 10000U)
#define USB_ROOTHUB_POLL_INTERVAL (100 * 10000U)
#define USB_HUB_POLL_INTERVAL 64
//
@ -75,13 +75,13 @@ typedef struct _USB_HUB_API USB_HUB_API;
//
// Wait for port statue reg change, set by experience
//
#define USB_WAIT_PORT_STS_CHANGE_STALL (5 * USB_BUS_1_MILLISECOND)
#define USB_WAIT_PORT_STS_CHANGE_STALL (100)
//
// Wait for set device address, refers to specification
// [USB20-9.2.6.3, it says 2ms]
//
#define USB_SET_DEVICE_ADDRESS_STALL (20 * USB_BUS_1_MILLISECOND)
#define USB_SET_DEVICE_ADDRESS_STALL (2 * USB_BUS_1_MILLISECOND)
//
// Wait for retry max packet size, set by experience
@ -99,7 +99,7 @@ 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 (20 * USB_BUS_1_MILLISECOND)
#define USB_SET_PORT_RESET_STALL (10 * USB_BUS_1_MILLISECOND)
#define USB_SET_ROOT_PORT_RESET_STALL (50 * USB_BUS_1_MILLISECOND)
//

5
MdeModulePkg/Bus/Usb/UsbBusDxe/UsbHub.c
View File

@ -763,7 +763,12 @@ UsbHubInit (
UsbHubCtrlSetPortFeature (HubIf->Device, Index, (EFI_USB_PORT_FEATURE) USB_HUB_PORT_POWER);
}
//
// Update for the usb hub has no power on delay requirement
//
if (HubDesc.PwrOn2PwrGood > 0) {
gBS->Stall (HubDesc.PwrOn2PwrGood * USB_SET_PORT_POWER_STALL);
}
UsbHubAckHubStatus (HubIf->Device);
}

4
MdeModulePkg/Bus/Usb/UsbBusDxe/UsbHub.h
View File

@ -97,9 +97,9 @@ WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
//
// Host software return timeout if port status doesn't change
// after 500ms(LOOP * STALL = 100 * 5ms), set by experience
// after 500ms(LOOP * STALL = 5000 * 0.1ms), set by experience
//
#define USB_WAIT_PORT_STS_CHANGE_LOOP 100
#define USB_WAIT_PORT_STS_CHANGE_LOOP 5000
#pragma pack(1)
//