diff options
Diffstat (limited to 'roms/edk2/MdeModulePkg/Bus/Usb/UsbBusDxe/UsbHub.c')
| -rw-r--r-- | roms/edk2/MdeModulePkg/Bus/Usb/UsbBusDxe/UsbHub.c | 1285 |
1 files changed, 1285 insertions, 0 deletions
diff --git a/roms/edk2/MdeModulePkg/Bus/Usb/UsbBusDxe/UsbHub.c b/roms/edk2/MdeModulePkg/Bus/Usb/UsbBusDxe/UsbHub.c new file mode 100644 index 000000000..c5bd11251 --- /dev/null +++ b/roms/edk2/MdeModulePkg/Bus/Usb/UsbBusDxe/UsbHub.c @@ -0,0 +1,1285 @@ +/** @file
+
+ Unified interface for RootHub and Hub.
+
+Copyright (c) 2007 - 2018, Intel Corporation. All rights reserved.<BR>
+SPDX-License-Identifier: BSD-2-Clause-Patent
+
+**/
+
+#include "UsbBus.h"
+
+//
+// Array that maps the change bit to feature value which is
+// used to clear these change bit. USB HUB API will clear
+// these change bit automatically. For non-root hub, these
+// bits determine whether hub will report the port in changed
+// bit maps.
+//
+USB_CHANGE_FEATURE_MAP mHubFeatureMap[] = {
+ {USB_PORT_STAT_C_CONNECTION, EfiUsbPortConnectChange},
+ {USB_PORT_STAT_C_ENABLE, EfiUsbPortEnableChange},
+ {USB_PORT_STAT_C_SUSPEND, EfiUsbPortSuspendChange},
+ {USB_PORT_STAT_C_OVERCURRENT, EfiUsbPortOverCurrentChange},
+ {USB_PORT_STAT_C_RESET, EfiUsbPortResetChange}
+};
+
+USB_CHANGE_FEATURE_MAP mRootHubFeatureMap[] = {
+ {USB_PORT_STAT_C_CONNECTION, EfiUsbPortConnectChange},
+ {USB_PORT_STAT_C_ENABLE, EfiUsbPortEnableChange},
+ {USB_PORT_STAT_C_SUSPEND, EfiUsbPortSuspendChange},
+ {USB_PORT_STAT_C_OVERCURRENT, EfiUsbPortOverCurrentChange},
+ {USB_PORT_STAT_C_RESET, EfiUsbPortResetChange},
+};
+
+//
+// USB hub class specific requests. Although USB hub
+// is related to an interface, these requests are sent
+// to the control endpoint of the device.
+//
+/**
+ USB hub control transfer to set the hub depth.
+
+ @param HubDev The device of the hub.
+ @param Depth The depth to set.
+
+ @retval EFI_SUCCESS Depth of the hub is set.
+ @retval Others Failed to set the depth.
+
+**/
+EFI_STATUS
+UsbHubCtrlSetHubDepth (
+ IN USB_DEVICE *HubDev,
+ IN UINT16 Depth
+ )
+{
+ EFI_STATUS Status;
+
+ Status = UsbCtrlRequest (
+ HubDev,
+ EfiUsbNoData,
+ USB_REQ_TYPE_CLASS,
+ USB_HUB_TARGET_HUB,
+ USB_HUB_REQ_SET_DEPTH,
+ Depth,
+ 0,
+ NULL,
+ 0
+ );
+
+ return Status;
+}
+
+/**
+ USB hub control transfer to clear the hub feature.
+
+ @param HubDev The device of the hub.
+ @param Feature The feature to clear.
+
+ @retval EFI_SUCCESS Feature of the hub is cleared.
+ @retval Others Failed to clear the feature.
+
+**/
+EFI_STATUS
+UsbHubCtrlClearHubFeature (
+ IN USB_DEVICE *HubDev,
+ IN UINT16 Feature
+ )
+{
+ EFI_STATUS Status;
+
+ Status = UsbCtrlRequest (
+ HubDev,
+ EfiUsbNoData,
+ USB_REQ_TYPE_CLASS,
+ USB_HUB_TARGET_HUB,
+ USB_HUB_REQ_CLEAR_FEATURE,
+ Feature,
+ 0,
+ NULL,
+ 0
+ );
+
+ return Status;
+}
+
+
+/**
+ Clear the feature of the device's port.
+
+ @param HubDev The hub device.
+ @param Port The port to clear feature.
+ @param Feature The feature to clear.
+
+ @retval EFI_SUCCESS The feature of the port is cleared.
+ @retval Others Failed to clear the feature.
+
+**/
+EFI_STATUS
+UsbHubCtrlClearPortFeature (
+ IN USB_DEVICE *HubDev,
+ IN UINT8 Port,
+ IN UINT16 Feature
+ )
+{
+ EFI_STATUS Status;
+
+ //
+ // In USB bus, all the port index starts from 0. But HUB
+ // indexes its port from 1. So, port number is added one.
+ //
+ Status = UsbCtrlRequest (
+ HubDev,
+ EfiUsbNoData,
+ USB_REQ_TYPE_CLASS,
+ USB_HUB_TARGET_PORT,
+ USB_HUB_REQ_CLEAR_FEATURE,
+ Feature,
+ (UINT16) (Port + 1),
+ NULL,
+ 0
+ );
+
+ return Status;
+}
+
+
+/**
+ Clear the transaction translate buffer if full/low
+ speed control/bulk transfer failed and the transfer
+ uses this hub as translator.Remember to clear the TT
+ buffer of transaction translator, not that of the
+ parent.
+
+ @param HubDev The hub device.
+ @param Port The port of the hub.
+ @param DevAddr Address of the failed transaction.
+ @param EpNum The endpoint number of the failed transaction.
+ @param EpType The type of failed transaction.
+
+ @retval EFI_SUCCESS The TT buffer is cleared.
+ @retval Others Failed to clear the TT buffer.
+
+**/
+EFI_STATUS
+UsbHubCtrlClearTTBuffer (
+ IN USB_DEVICE *HubDev,
+ IN UINT8 Port,
+ IN UINT16 DevAddr,
+ IN UINT16 EpNum,
+ IN UINT16 EpType
+ )
+{
+ EFI_STATUS Status;
+ UINT16 Value;
+
+ //
+ // Check USB2.0 spec page 424 for wValue's encoding
+ //
+ Value = (UINT16) ((EpNum & 0x0F) | (DevAddr << 4) |
+ ((EpType & 0x03) << 11) | ((EpNum & 0x80) << 15));
+
+ Status = UsbCtrlRequest (
+ HubDev,
+ EfiUsbNoData,
+ USB_REQ_TYPE_CLASS,
+ USB_HUB_TARGET_PORT,
+ USB_HUB_REQ_CLEAR_TT,
+ Value,
+ (UINT16) (Port + 1),
+ NULL,
+ 0
+ );
+
+ return Status;
+}
+
+/**
+ Usb hub control transfer to get the (super speed) hub descriptor.
+
+ @param HubDev The hub device.
+ @param Buf The buffer to hold the descriptor.
+ @param Len The length to retrieve.
+
+ @retval EFI_SUCCESS The hub descriptor is retrieved.
+ @retval Others Failed to retrieve the hub descriptor.
+
+**/
+EFI_STATUS
+UsbHubCtrlGetHubDesc (
+ IN USB_DEVICE *HubDev,
+ OUT VOID *Buf,
+ IN UINTN Len
+ )
+{
+ EFI_STATUS Status;
+ UINT8 DescType;
+
+ DescType = (HubDev->Speed == EFI_USB_SPEED_SUPER) ?
+ USB_DESC_TYPE_HUB_SUPER_SPEED :
+ USB_DESC_TYPE_HUB;
+
+ Status = UsbCtrlRequest (
+ HubDev,
+ EfiUsbDataIn,
+ USB_REQ_TYPE_CLASS,
+ USB_HUB_TARGET_HUB,
+ USB_HUB_REQ_GET_DESC,
+ (UINT16) (DescType << 8),
+ 0,
+ Buf,
+ Len
+ );
+
+ return Status;
+}
+
+
+/**
+ Usb hub control transfer to get the hub status.
+
+ @param HubDev The hub device.
+ @param State The variable to return the status.
+
+ @retval EFI_SUCCESS The hub status is returned in State.
+ @retval Others Failed to get the hub status.
+
+**/
+EFI_STATUS
+UsbHubCtrlGetHubStatus (
+ IN USB_DEVICE *HubDev,
+ OUT UINT32 *State
+ )
+{
+ EFI_STATUS Status;
+
+ Status = UsbCtrlRequest (
+ HubDev,
+ EfiUsbDataIn,
+ USB_REQ_TYPE_CLASS,
+ USB_HUB_TARGET_HUB,
+ USB_HUB_REQ_GET_STATUS,
+ 0,
+ 0,
+ State,
+ 4
+ );
+
+ return Status;
+}
+
+
+/**
+ Usb hub control transfer to get the port status.
+
+ @param HubDev The hub device.
+ @param Port The port of the hub.
+ @param State Variable to return the hub port state.
+
+ @retval EFI_SUCCESS The port state is returned in State.
+ @retval Others Failed to retrieve the port state.
+
+**/
+EFI_STATUS
+UsbHubCtrlGetPortStatus (
+ IN USB_DEVICE *HubDev,
+ IN UINT8 Port,
+ OUT VOID *State
+ )
+{
+ EFI_STATUS Status;
+
+ //
+ // In USB bus, all the port index starts from 0. But HUB
+ // indexes its port from 1. So, port number is added one.
+ // No need to convert the hub bit to UEFI definition, they
+ // are the same
+ //
+ Status = UsbCtrlRequest (
+ HubDev,
+ EfiUsbDataIn,
+ USB_REQ_TYPE_CLASS,
+ USB_HUB_TARGET_PORT,
+ USB_HUB_REQ_GET_STATUS,
+ 0,
+ (UINT16) (Port + 1),
+ State,
+ 4
+ );
+
+ return Status;
+}
+
+
+/**
+ Usb hub control transfer to set the port feature.
+
+ @param HubDev The Usb hub device.
+ @param Port The Usb port to set feature for.
+ @param Feature The feature to set.
+
+ @retval EFI_SUCCESS The feature is set for the port.
+ @retval Others Failed to set the feature.
+
+**/
+EFI_STATUS
+UsbHubCtrlSetPortFeature (
+ IN USB_DEVICE *HubDev,
+ IN UINT8 Port,
+ IN UINT8 Feature
+ )
+{
+ EFI_STATUS Status;
+
+ //
+ // In USB bus, all the port index starts from 0. But HUB
+ // indexes its port from 1. So, port number is added one.
+ //
+ Status = UsbCtrlRequest (
+ HubDev,
+ EfiUsbNoData,
+ USB_REQ_TYPE_CLASS,
+ USB_HUB_TARGET_PORT,
+ USB_HUB_REQ_SET_FEATURE,
+ Feature,
+ (UINT16) (Port + 1),
+ NULL,
+ 0
+ );
+
+ return Status;
+}
+
+
+/**
+ Read the whole usb hub descriptor. It is necessary
+ to do it in two steps because hub descriptor is of
+ variable length.
+
+ @param HubDev The hub device.
+ @param HubDesc The variable to return the descriptor.
+
+ @retval EFI_SUCCESS The hub descriptor is read.
+ @retval Others Failed to read the hub descriptor.
+
+**/
+EFI_STATUS
+UsbHubReadDesc (
+ IN USB_DEVICE *HubDev,
+ OUT EFI_USB_HUB_DESCRIPTOR *HubDesc
+ )
+{
+ EFI_STATUS Status;
+
+ //
+ // First get the hub descriptor length
+ //
+ Status = UsbHubCtrlGetHubDesc (HubDev, HubDesc, 2);
+
+ if (EFI_ERROR (Status)) {
+ return Status;
+ }
+
+ //
+ // Get the whole hub descriptor
+ //
+ return UsbHubCtrlGetHubDesc (HubDev, HubDesc, HubDesc->Length);
+}
+
+
+
+/**
+ Ack the hub change bits. If these bits are not ACKed, Hub will
+ always return changed bit map from its interrupt endpoint.
+
+ @param HubDev The hub device.
+
+ @retval EFI_SUCCESS The hub change status is ACKed.
+ @retval Others Failed to ACK the hub status.
+
+**/
+EFI_STATUS
+UsbHubAckHubStatus (
+ IN USB_DEVICE *HubDev
+ )
+{
+ EFI_USB_PORT_STATUS HubState;
+ EFI_STATUS Status;
+
+ Status = UsbHubCtrlGetHubStatus (HubDev, (UINT32 *) &HubState);
+
+ if (EFI_ERROR (Status)) {
+ return Status;
+ }
+
+ if (USB_BIT_IS_SET (HubState.PortChangeStatus, USB_HUB_STAT_C_LOCAL_POWER)) {
+ UsbHubCtrlClearHubFeature (HubDev, USB_HUB_C_HUB_LOCAL_POWER);
+ }
+
+ if (USB_BIT_IS_SET (HubState.PortChangeStatus, USB_HUB_STAT_C_OVER_CURRENT)) {
+ UsbHubCtrlClearHubFeature (HubDev, USB_HUB_C_HUB_OVER_CURRENT);
+ }
+
+ return EFI_SUCCESS;
+}
+
+
+/**
+ Test whether the interface is a hub interface.
+
+ @param UsbIf The interface to test.
+
+ @retval TRUE The interface is a hub interface.
+ @retval FALSE The interface isn't a hub interface.
+
+**/
+BOOLEAN
+UsbIsHubInterface (
+ IN USB_INTERFACE *UsbIf
+ )
+{
+ EFI_USB_INTERFACE_DESCRIPTOR *Setting;
+
+ //
+ // If the hub is a high-speed hub with multiple TT,
+ // the hub will has a default setting of single TT.
+ //
+ Setting = &UsbIf->IfSetting->Desc;
+
+ if ((Setting->InterfaceClass == USB_HUB_CLASS_CODE) &&
+ (Setting->InterfaceSubClass == USB_HUB_SUBCLASS_CODE)) {
+
+ return TRUE;
+ }
+
+ return FALSE;
+}
+
+
+/**
+ The callback function to the USB hub status change
+ interrupt endpoint. It is called periodically by
+ the underlying host controller.
+
+ @param Data The data read.
+ @param DataLength The length of the data read.
+ @param Context The context.
+ @param Result The result of the last interrupt transfer.
+
+ @retval EFI_SUCCESS The process is OK.
+ @retval EFI_OUT_OF_RESOURCES Failed to allocate resource.
+
+**/
+EFI_STATUS
+EFIAPI
+UsbOnHubInterrupt (
+ IN VOID *Data,
+ IN UINTN DataLength,
+ IN VOID *Context,
+ IN UINT32 Result
+ )
+{
+ USB_INTERFACE *HubIf;
+ EFI_USB_IO_PROTOCOL *UsbIo;
+ EFI_USB_ENDPOINT_DESCRIPTOR *EpDesc;
+ EFI_STATUS Status;
+
+ HubIf = (USB_INTERFACE *) Context;
+ UsbIo = &(HubIf->UsbIo);
+ EpDesc = &(HubIf->HubEp->Desc);
+
+ if (Result != EFI_USB_NOERROR) {
+ //
+ // If endpoint is stalled, clear the stall. Use UsbIo to access
+ // the control transfer so internal status are maintained.
+ //
+ if (USB_BIT_IS_SET (Result, EFI_USB_ERR_STALL)) {
+ UsbIoClearFeature (
+ UsbIo,
+ USB_TARGET_ENDPOINT,
+ USB_FEATURE_ENDPOINT_HALT,
+ EpDesc->EndpointAddress
+ );
+ }
+
+ //
+ // Delete and submit a new async interrupt
+ //
+ Status = UsbIo->UsbAsyncInterruptTransfer (
+ UsbIo,
+ EpDesc->EndpointAddress,
+ FALSE,
+ 0,
+ 0,
+ NULL,
+ NULL
+ );
+
+ if (EFI_ERROR (Status)) {
+ DEBUG (( EFI_D_ERROR, "UsbOnHubInterrupt: failed to remove async transfer - %r\n", Status));
+ return Status;
+ }
+
+ Status = UsbIo->UsbAsyncInterruptTransfer (
+ UsbIo,
+ EpDesc->EndpointAddress,
+ TRUE,
+ USB_HUB_POLL_INTERVAL,
+ HubIf->NumOfPort / 8 + 1,
+ UsbOnHubInterrupt,
+ HubIf
+ );
+
+ if (EFI_ERROR (Status)) {
+ DEBUG (( EFI_D_ERROR, "UsbOnHubInterrupt: failed to submit new async transfer - %r\n", Status));
+ }
+
+ return Status;
+ }
+
+ if ((DataLength == 0) || (Data == NULL)) {
+ return EFI_SUCCESS;
+ }
+
+ //
+ // OK, actually something is changed, save the change map
+ // then signal the HUB to do enumeration. This is a good
+ // practise since UsbOnHubInterrupt is called in the context
+ // of host controller's AsyncInterrupt monitor.
+ //
+ HubIf->ChangeMap = AllocateZeroPool (DataLength);
+
+ if (HubIf->ChangeMap == NULL) {
+ return EFI_OUT_OF_RESOURCES;
+ }
+
+ CopyMem (HubIf->ChangeMap, Data, DataLength);
+ gBS->SignalEvent (HubIf->HubNotify);
+
+ return EFI_SUCCESS;
+}
+
+
+
+
+/**
+ Initialize the device for a non-root hub.
+
+ @param HubIf The USB hub interface.
+
+ @retval EFI_SUCCESS The hub is initialized.
+ @retval EFI_DEVICE_ERROR Failed to initialize the hub.
+
+**/
+EFI_STATUS
+UsbHubInit (
+ IN USB_INTERFACE *HubIf
+ )
+{
+ UINT8 HubDescBuffer[256];
+ EFI_USB_HUB_DESCRIPTOR *HubDesc;
+ USB_ENDPOINT_DESC *EpDesc;
+ USB_INTERFACE_SETTING *Setting;
+ EFI_USB_IO_PROTOCOL *UsbIo;
+ USB_DEVICE *HubDev;
+ EFI_STATUS Status;
+ UINT8 Index;
+ UINT8 NumEndpoints;
+ UINT16 Depth;
+
+ //
+ // Locate the interrupt endpoint for port change map
+ //
+ HubIf->IsHub = FALSE;
+ Setting = HubIf->IfSetting;
+ HubDev = HubIf->Device;
+ EpDesc = NULL;
+ NumEndpoints = Setting->Desc.NumEndpoints;
+
+ for (Index = 0; Index < NumEndpoints; Index++) {
+ ASSERT ((Setting->Endpoints != NULL) && (Setting->Endpoints[Index] != NULL));
+
+ EpDesc = Setting->Endpoints[Index];
+
+ if (USB_BIT_IS_SET (EpDesc->Desc.EndpointAddress, USB_ENDPOINT_DIR_IN) &&
+ (USB_ENDPOINT_TYPE (&EpDesc->Desc) == USB_ENDPOINT_INTERRUPT)) {
+ break;
+ }
+ }
+
+ if (Index == NumEndpoints) {
+ DEBUG (( EFI_D_ERROR, "UsbHubInit: no interrupt endpoint found for hub %d\n", HubDev->Address));
+ return EFI_DEVICE_ERROR;
+ }
+
+ //
+ // The length field of descriptor is UINT8 type, so the buffer
+ // with 256 bytes is enough to hold the descriptor data.
+ //
+ HubDesc = (EFI_USB_HUB_DESCRIPTOR *) HubDescBuffer;
+ Status = UsbHubReadDesc (HubDev, HubDesc);
+
+ if (EFI_ERROR (Status)) {
+ DEBUG (( EFI_D_ERROR, "UsbHubInit: failed to read HUB descriptor %r\n", Status));
+ return Status;
+ }
+
+ HubIf->NumOfPort = HubDesc->NumPorts;
+
+ DEBUG (( EFI_D_INFO, "UsbHubInit: hub %d has %d ports\n", HubDev->Address,HubIf->NumOfPort));
+
+ //
+ // OK, set IsHub to TRUE. Now usb bus can handle this device
+ // as a working HUB. If failed earlier, bus driver will not
+ // recognize it as a hub. Other parts of the bus should be able
+ // to work.
+ //
+ HubIf->IsHub = TRUE;
+ HubIf->HubApi = &mUsbHubApi;
+ HubIf->HubEp = EpDesc;
+
+ if (HubIf->Device->Speed == EFI_USB_SPEED_SUPER) {
+ Depth = (UINT16)(HubIf->Device->Tier - 1);
+ DEBUG ((EFI_D_INFO, "UsbHubInit: Set Hub Depth as 0x%x\n", Depth));
+ UsbHubCtrlSetHubDepth (HubIf->Device, Depth);
+
+ for (Index = 0; Index < HubDesc->NumPorts; Index++) {
+ UsbHubCtrlSetPortFeature (HubIf->Device, Index, USB_HUB_PORT_REMOTE_WAKE_MASK);
+ }
+ } else {
+ //
+ // Feed power to all the hub ports. It should be ok
+ // for both gang/individual powered hubs.
+ //
+ for (Index = 0; Index < HubDesc->NumPorts; Index++) {
+ 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);
+ }
+
+ //
+ // Create an event to enumerate the hub's port. On
+ //
+ Status = gBS->CreateEvent (
+ EVT_NOTIFY_SIGNAL,
+ TPL_CALLBACK,
+ UsbHubEnumeration,
+ HubIf,
+ &HubIf->HubNotify
+ );
+
+ if (EFI_ERROR (Status)) {
+ DEBUG (( EFI_D_ERROR, "UsbHubInit: failed to create signal for hub %d - %r\n",
+ HubDev->Address, Status));
+
+ return Status;
+ }
+
+ //
+ // Create AsyncInterrupt to query hub port change endpoint
+ // periodically. If the hub ports are changed, hub will return
+ // changed port map from the interrupt endpoint. The port map
+ // must be able to hold (HubIf->NumOfPort + 1) bits (one bit for
+ // host change status).
+ //
+ UsbIo = &HubIf->UsbIo;
+ Status = UsbIo->UsbAsyncInterruptTransfer (
+ UsbIo,
+ EpDesc->Desc.EndpointAddress,
+ TRUE,
+ USB_HUB_POLL_INTERVAL,
+ HubIf->NumOfPort / 8 + 1,
+ UsbOnHubInterrupt,
+ HubIf
+ );
+
+ if (EFI_ERROR (Status)) {
+ DEBUG (( EFI_D_ERROR, "UsbHubInit: failed to queue interrupt transfer for hub %d - %r\n",
+ HubDev->Address, Status));
+
+ gBS->CloseEvent (HubIf->HubNotify);
+ HubIf->HubNotify = NULL;
+
+ return Status;
+ }
+
+ DEBUG (( EFI_D_INFO, "UsbHubInit: hub %d initialized\n", HubDev->Address));
+ return Status;
+}
+
+
+
+/**
+ Get the port status. This function is required to
+ ACK the port change bits although it will return
+ the port changes in PortState. Bus enumeration code
+ doesn't need to ACK the port change bits.
+
+ @param HubIf The hub interface.
+ @param Port The port of the hub to get state.
+ @param PortState Variable to return the port state.
+
+ @retval EFI_SUCCESS The port status is successfully returned.
+ @retval Others Failed to return the status.
+
+**/
+EFI_STATUS
+UsbHubGetPortStatus (
+ IN USB_INTERFACE *HubIf,
+ IN UINT8 Port,
+ OUT EFI_USB_PORT_STATUS *PortState
+ )
+{
+ EFI_STATUS Status;
+
+ Status = UsbHubCtrlGetPortStatus (HubIf->Device, Port, PortState);
+
+ return Status;
+}
+
+
+
+/**
+ Clear the port change status.
+
+ @param HubIf The hub interface.
+ @param Port The hub port.
+
+**/
+VOID
+UsbHubClearPortChange (
+ IN USB_INTERFACE *HubIf,
+ IN UINT8 Port
+ )
+{
+ EFI_USB_PORT_STATUS PortState;
+ USB_CHANGE_FEATURE_MAP *Map;
+ UINTN Index;
+ EFI_STATUS Status;
+
+ Status = UsbHubGetPortStatus (HubIf, Port, &PortState);
+
+ if (EFI_ERROR (Status)) {
+ return;
+ }
+
+ //
+ // OK, get the usb port status, now ACK the change bits.
+ // Don't return error when failed to clear the change bits.
+ // It may lead to extra port state report. USB bus should
+ // be able to handle this.
+ //
+ for (Index = 0; Index < ARRAY_SIZE (mHubFeatureMap); Index++) {
+ Map = &mHubFeatureMap[Index];
+
+ if (USB_BIT_IS_SET (PortState.PortChangeStatus, Map->ChangedBit)) {
+ UsbHubCtrlClearPortFeature (HubIf->Device, Port, (UINT16) Map->Feature);
+ }
+ }
+}
+
+
+
+/**
+ Function to set the port feature for non-root hub.
+
+ @param HubIf The hub interface.
+ @param Port The port of the hub.
+ @param Feature The feature of the port to set.
+
+ @retval EFI_SUCCESS The hub port feature is set.
+ @retval Others Failed to set the port feature.
+
+**/
+EFI_STATUS
+UsbHubSetPortFeature (
+ IN USB_INTERFACE *HubIf,
+ IN UINT8 Port,
+ IN EFI_USB_PORT_FEATURE Feature
+ )
+{
+ EFI_STATUS Status;
+
+ Status = UsbHubCtrlSetPortFeature (HubIf->Device, Port, (UINT8) Feature);
+
+ return Status;
+}
+
+
+/**
+ Interface function to clear the port feature for non-root hub.
+
+ @param HubIf The hub interface.
+ @param Port The port of the hub to clear feature for.
+ @param Feature The feature to clear.
+
+ @retval EFI_SUCCESS The port feature is cleared.
+ @retval Others Failed to clear the port feature.
+
+**/
+EFI_STATUS
+UsbHubClearPortFeature (
+ IN USB_INTERFACE *HubIf,
+ IN UINT8 Port,
+ IN EFI_USB_PORT_FEATURE Feature
+ )
+{
+ EFI_STATUS Status;
+
+ Status = UsbHubCtrlClearPortFeature (HubIf->Device, Port, (UINT8) Feature);
+
+ return Status;
+}
+
+
+/**
+ Interface function to reset the port.
+
+ @param HubIf The hub interface.
+ @param Port The port to reset.
+
+ @retval EFI_SUCCESS The hub port is reset.
+ @retval EFI_TIMEOUT Failed to reset the port in time.
+ @retval Others Failed to reset the port.
+
+**/
+EFI_STATUS
+UsbHubResetPort (
+ IN USB_INTERFACE *HubIf,
+ IN UINT8 Port
+ )
+{
+ EFI_USB_PORT_STATUS PortState;
+ UINTN Index;
+ EFI_STATUS Status;
+
+ Status = UsbHubSetPortFeature (HubIf, Port, (EFI_USB_PORT_FEATURE) USB_HUB_PORT_RESET);
+
+ if (EFI_ERROR (Status)) {
+ return Status;
+ }
+
+ //
+ // Drive the reset signal for worst 20ms. Check USB 2.0 Spec
+ // section 7.1.7.5 for timing requirements.
+ //
+ gBS->Stall (USB_SET_PORT_RESET_STALL);
+
+ //
+ // Check USB_PORT_STAT_C_RESET bit to see if the resetting state is done.
+ //
+ ZeroMem (&PortState, sizeof (EFI_USB_PORT_STATUS));
+
+ for (Index = 0; Index < USB_WAIT_PORT_STS_CHANGE_LOOP; Index++) {
+ Status = UsbHubGetPortStatus (HubIf, Port, &PortState);
+
+ if (EFI_ERROR (Status)) {
+ return Status;
+ }
+
+ if (!EFI_ERROR (Status) &&
+ USB_BIT_IS_SET (PortState.PortChangeStatus, USB_PORT_STAT_C_RESET)) {
+ gBS->Stall (USB_SET_PORT_RECOVERY_STALL);
+ return EFI_SUCCESS;
+ }
+
+ gBS->Stall (USB_WAIT_PORT_STS_CHANGE_STALL);
+ }
+
+ return EFI_TIMEOUT;
+}
+
+
+/**
+ Release the hub's control of the interface.
+
+ @param HubIf The hub interface.
+
+ @retval EFI_SUCCESS The interface is release of hub control.
+
+**/
+EFI_STATUS
+UsbHubRelease (
+ IN USB_INTERFACE *HubIf
+ )
+{
+ EFI_USB_IO_PROTOCOL *UsbIo;
+ EFI_STATUS Status;
+
+ UsbIo = &HubIf->UsbIo;
+ Status = UsbIo->UsbAsyncInterruptTransfer (
+ UsbIo,
+ HubIf->HubEp->Desc.EndpointAddress,
+ FALSE,
+ USB_HUB_POLL_INTERVAL,
+ 0,
+ NULL,
+ 0
+ );
+
+ if (EFI_ERROR (Status)) {
+ return Status;
+ }
+
+ gBS->CloseEvent (HubIf->HubNotify);
+
+ HubIf->IsHub = FALSE;
+ HubIf->HubApi = NULL;
+ HubIf->HubEp = NULL;
+ HubIf->HubNotify = NULL;
+
+ DEBUG (( EFI_D_INFO, "UsbHubRelease: hub device %d released\n", HubIf->Device->Address));
+ return EFI_SUCCESS;
+}
+
+
+
+/**
+ Initialize the interface for root hub.
+
+ @param HubIf The root hub interface.
+
+ @retval EFI_SUCCESS The interface is initialized for root hub.
+ @retval Others Failed to initialize the hub.
+
+**/
+EFI_STATUS
+UsbRootHubInit (
+ IN USB_INTERFACE *HubIf
+ )
+{
+ EFI_STATUS Status;
+ UINT8 MaxSpeed;
+ UINT8 NumOfPort;
+ UINT8 Support64;
+
+ Status = UsbHcGetCapability (HubIf->Device->Bus, &MaxSpeed, &NumOfPort, &Support64);
+
+ if (EFI_ERROR (Status)) {
+ return Status;
+ }
+
+ DEBUG (( EFI_D_INFO, "UsbRootHubInit: root hub %p - max speed %d, %d ports\n",
+ HubIf, MaxSpeed, NumOfPort));
+
+ HubIf->IsHub = TRUE;
+ HubIf->HubApi = &mUsbRootHubApi;
+ HubIf->HubEp = NULL;
+ HubIf->MaxSpeed = MaxSpeed;
+ HubIf->NumOfPort = NumOfPort;
+ HubIf->HubNotify = NULL;
+
+ //
+ // Create a timer to poll root hub ports periodically
+ //
+ Status = gBS->CreateEvent (
+ EVT_TIMER | EVT_NOTIFY_SIGNAL,
+ TPL_CALLBACK,
+ UsbRootHubEnumeration,
+ HubIf,
+ &HubIf->HubNotify
+ );
+
+ if (EFI_ERROR (Status)) {
+ return Status;
+ }
+
+ //
+ // It should signal the event immediately here, or device detection
+ // by bus enumeration might be delayed by the timer interval.
+ //
+ gBS->SignalEvent (HubIf->HubNotify);
+
+ Status = gBS->SetTimer (
+ HubIf->HubNotify,
+ TimerPeriodic,
+ USB_ROOTHUB_POLL_INTERVAL
+ );
+
+ if (EFI_ERROR (Status)) {
+ gBS->CloseEvent (HubIf->HubNotify);
+ }
+
+ return Status;
+}
+
+
+/**
+ Get the port status. This function is required to
+ ACK the port change bits although it will return
+ the port changes in PortState. Bus enumeration code
+ doesn't need to ACK the port change bits.
+
+ @param HubIf The root hub interface.
+ @param Port The root hub port to get the state.
+ @param PortState Variable to return the port state.
+
+ @retval EFI_SUCCESS The port state is returned.
+ @retval Others Failed to retrieve the port state.
+
+**/
+EFI_STATUS
+UsbRootHubGetPortStatus (
+ IN USB_INTERFACE *HubIf,
+ IN UINT8 Port,
+ OUT EFI_USB_PORT_STATUS *PortState
+ )
+{
+ USB_BUS *Bus;
+ EFI_STATUS Status;
+
+ Bus = HubIf->Device->Bus;
+ Status = UsbHcGetRootHubPortStatus (Bus, Port, PortState);
+
+ return Status;
+}
+
+
+/**
+ Clear the port change status.
+
+ @param HubIf The root hub interface.
+ @param Port The root hub port.
+
+**/
+VOID
+UsbRootHubClearPortChange (
+ IN USB_INTERFACE *HubIf,
+ IN UINT8 Port
+ )
+{
+ EFI_USB_PORT_STATUS PortState;
+ USB_CHANGE_FEATURE_MAP *Map;
+ UINTN Index;
+ EFI_STATUS Status;
+
+ Status = UsbRootHubGetPortStatus (HubIf, Port, &PortState);
+
+ if (EFI_ERROR (Status)) {
+ return;
+ }
+
+ //
+ // OK, get the usb port status, now ACK the change bits.
+ // Don't return error when failed to clear the change bits.
+ // It may lead to extra port state report. USB bus should
+ // be able to handle this.
+ //
+ for (Index = 0; Index < ARRAY_SIZE (mRootHubFeatureMap); Index++) {
+ Map = &mRootHubFeatureMap[Index];
+
+ if (USB_BIT_IS_SET (PortState.PortChangeStatus, Map->ChangedBit)) {
+ UsbHcClearRootHubPortFeature (HubIf->Device->Bus, Port, (EFI_USB_PORT_FEATURE) Map->Feature);
+ }
+ }
+}
+
+
+/**
+ Set the root hub port feature.
+
+ @param HubIf The Usb hub interface.
+ @param Port The hub port.
+ @param Feature The feature to set.
+
+ @retval EFI_SUCCESS The root hub port is set with the feature.
+ @retval Others Failed to set the feature.
+
+**/
+EFI_STATUS
+UsbRootHubSetPortFeature (
+ IN USB_INTERFACE *HubIf,
+ IN UINT8 Port,
+ IN EFI_USB_PORT_FEATURE Feature
+ )
+{
+ EFI_STATUS Status;
+
+ Status = UsbHcSetRootHubPortFeature (HubIf->Device->Bus, Port, Feature);
+
+ return Status;
+}
+
+
+/**
+ Clear the root hub port feature.
+
+ @param HubIf The root hub interface.
+ @param Port The root hub port.
+ @param Feature The feature to clear.
+
+ @retval EFI_SUCCESS The root hub port is cleared of the feature.
+ @retval Others Failed to clear the feature.
+
+**/
+EFI_STATUS
+UsbRootHubClearPortFeature (
+ IN USB_INTERFACE *HubIf,
+ IN UINT8 Port,
+ IN EFI_USB_PORT_FEATURE Feature
+ )
+{
+ EFI_STATUS Status;
+
+ Status = UsbHcClearRootHubPortFeature (HubIf->Device->Bus, Port, Feature);
+
+ return Status;
+}
+
+
+/**
+ Interface function to reset the root hub port.
+
+ @param RootIf The root hub interface.
+ @param Port The port to reset.
+
+ @retval EFI_SUCCESS The hub port is reset.
+ @retval EFI_TIMEOUT Failed to reset the port in time.
+ @retval EFI_NOT_FOUND The low/full speed device connected to high speed.
+ root hub is released to the companion UHCI.
+ @retval Others Failed to reset the port.
+
+**/
+EFI_STATUS
+UsbRootHubResetPort (
+ IN USB_INTERFACE *RootIf,
+ IN UINT8 Port
+ )
+{
+ USB_BUS *Bus;
+ EFI_STATUS Status;
+ EFI_USB_PORT_STATUS PortState;
+ UINTN Index;
+
+ //
+ // Notice: although EHCI requires that ENABLED bit be cleared
+ // when reset the port, we don't need to care that here. It
+ // should be handled in the EHCI driver.
+ //
+ Bus = RootIf->Device->Bus;
+
+ Status = UsbHcSetRootHubPortFeature (Bus, Port, EfiUsbPortReset);
+
+ if (EFI_ERROR (Status)) {
+ DEBUG (( EFI_D_ERROR, "UsbRootHubResetPort: failed to start reset on port %d\n", Port));
+ return Status;
+ }
+
+ //
+ // Drive the reset signal for at least 50ms. Check USB 2.0 Spec
+ // section 7.1.7.5 for timing requirements.
+ //
+ gBS->Stall (USB_SET_ROOT_PORT_RESET_STALL);
+
+ Status = UsbHcClearRootHubPortFeature (Bus, Port, EfiUsbPortReset);
+
+ if (EFI_ERROR (Status)) {
+ DEBUG (( EFI_D_ERROR, "UsbRootHubResetPort: failed to clear reset on port %d\n", Port));
+ return Status;
+ }
+
+ gBS->Stall (USB_CLR_ROOT_PORT_RESET_STALL);
+
+ //
+ // USB host controller won't clear the RESET bit until
+ // reset is actually finished.
+ //
+ ZeroMem (&PortState, sizeof (EFI_USB_PORT_STATUS));
+
+ for (Index = 0; Index < USB_WAIT_PORT_STS_CHANGE_LOOP; Index++) {
+ Status = UsbHcGetRootHubPortStatus (Bus, Port, &PortState);
+
+ if (EFI_ERROR (Status)) {
+ return Status;
+ }
+
+ if (!USB_BIT_IS_SET (PortState.PortStatus, USB_PORT_STAT_RESET)) {
+ break;
+ }
+
+ gBS->Stall (USB_WAIT_PORT_STS_CHANGE_STALL);
+ }
+
+ if (Index == USB_WAIT_PORT_STS_CHANGE_LOOP) {
+ DEBUG ((EFI_D_ERROR, "UsbRootHubResetPort: reset not finished in time on port %d\n", Port));
+ return EFI_TIMEOUT;
+ }
+
+ if (!USB_BIT_IS_SET (PortState.PortStatus, USB_PORT_STAT_ENABLE)) {
+ //
+ // OK, the port is reset. If root hub is of high speed and
+ // the device is of low/full speed, release the ownership to
+ // companion UHCI. If root hub is of full speed, it won't
+ // automatically enable the port, we need to enable it manually.
+ //
+ if (RootIf->MaxSpeed == EFI_USB_SPEED_HIGH) {
+ DEBUG (( EFI_D_ERROR, "UsbRootHubResetPort: release low/full speed device (%d) to UHCI\n", Port));
+
+ UsbRootHubSetPortFeature (RootIf, Port, EfiUsbPortOwner);
+ return EFI_NOT_FOUND;
+
+ } else {
+
+ Status = UsbRootHubSetPortFeature (RootIf, Port, EfiUsbPortEnable);
+
+ if (EFI_ERROR (Status)) {
+ DEBUG (( EFI_D_ERROR, "UsbRootHubResetPort: failed to enable port %d for UHCI\n", Port));
+ return Status;
+ }
+
+ gBS->Stall (USB_SET_ROOT_PORT_ENABLE_STALL);
+ }
+ }
+
+ return EFI_SUCCESS;
+}
+
+
+/**
+ Release the root hub's control of the interface.
+
+ @param HubIf The root hub interface.
+
+ @retval EFI_SUCCESS The root hub's control of the interface is
+ released.
+
+**/
+EFI_STATUS
+UsbRootHubRelease (
+ IN USB_INTERFACE *HubIf
+ )
+{
+ DEBUG (( EFI_D_INFO, "UsbRootHubRelease: root hub released for hub %p\n", HubIf));
+
+ gBS->SetTimer (HubIf->HubNotify, TimerCancel, USB_ROOTHUB_POLL_INTERVAL);
+ gBS->CloseEvent (HubIf->HubNotify);
+
+ return EFI_SUCCESS;
+}
+
+USB_HUB_API mUsbHubApi = {
+ UsbHubInit,
+ UsbHubGetPortStatus,
+ UsbHubClearPortChange,
+ UsbHubSetPortFeature,
+ UsbHubClearPortFeature,
+ UsbHubResetPort,
+ UsbHubRelease
+};
+
+USB_HUB_API mUsbRootHubApi = {
+ UsbRootHubInit,
+ UsbRootHubGetPortStatus,
+ UsbRootHubClearPortChange,
+ UsbRootHubSetPortFeature,
+ UsbRootHubClearPortFeature,
+ UsbRootHubResetPort,
+ UsbRootHubRelease
+};
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