system76-edk2/MdeModulePkg/Bus/Usb/UsbBusPei/PeiUsbLib.c

/** @file
Common Library for PEI USB

Copyright (c) 2006 - 2018, Intel Corporation. All rights reserved. <BR>

SPDX-License-Identifier: BSD-2-Clause-Patent

**/

#include "UsbPeim.h"
#include "PeiUsbLib.h"

/**
  Get a given usb descriptor.

  @param  PeiServices        General-purpose services that are available to every PEIM.
  @param  UsbIoPpi           Indicates the PEI_USB_IO_PPI instance.
  @param  Value              Request Value.
  @param  Index              Request Index.
  @param  DescriptorLength   Request descriptor Length.
  @param  Descriptor         Request descriptor.


  @retval EFI_SUCCESS       Usb descriptor is obtained successfully.
  @retval EFI_DEVICE_ERROR  Cannot get the usb descriptor due to a hardware error.
  @retval Others            Other failure occurs.

**/
EFI_STATUS
PeiUsbGetDescriptor (
  IN  EFI_PEI_SERVICES  **PeiServices,
  IN  PEI_USB_IO_PPI    *UsbIoPpi,
  IN  UINT16            Value,
  IN  UINT16            Index,
  IN  UINT16            DescriptorLength,
  OUT VOID              *Descriptor
  )
{
  EFI_USB_DEVICE_REQUEST  DevReq;

  ASSERT (UsbIoPpi != NULL);

  DevReq.RequestType = USB_DEV_GET_DESCRIPTOR_REQ_TYPE;
  DevReq.Request     = USB_DEV_GET_DESCRIPTOR;
  DevReq.Value       = Value;
  DevReq.Index       = Index;
  DevReq.Length      = DescriptorLength;

  return UsbIoPpi->UsbControlTransfer (
                     PeiServices,
                     UsbIoPpi,
                     &DevReq,
                     EfiUsbDataIn,
                     PcdGet32 (PcdUsbTransferTimeoutValue),
                     Descriptor,
                     DescriptorLength
                     );
}

/**
  Set a usb device with a specified address.

  @param  PeiServices        General-purpose services that are available to every PEIM.
  @param  UsbIoPpi           Indicates the PEI_USB_IO_PPI instance.
  @param  AddressValue       The address to assign.

  @retval EFI_SUCCESS       Usb device address is set successfully.
  @retval EFI_DEVICE_ERROR  Cannot set the usb address due to a hardware error.
  @retval Others            Other failure occurs.

**/
EFI_STATUS
PeiUsbSetDeviceAddress (
  IN EFI_PEI_SERVICES  **PeiServices,
  IN PEI_USB_IO_PPI    *UsbIoPpi,
  IN UINT16            AddressValue
  )
{
  EFI_USB_DEVICE_REQUEST  DevReq;

  ASSERT (UsbIoPpi != NULL);

  DevReq.RequestType = USB_DEV_SET_ADDRESS_REQ_TYPE;
  DevReq.Request     = USB_DEV_SET_ADDRESS;
  DevReq.Value       = AddressValue;
  DevReq.Index       = 0;
  DevReq.Length      = 0;

  return UsbIoPpi->UsbControlTransfer (
                     PeiServices,
                     UsbIoPpi,
                     &DevReq,
                     EfiUsbNoData,
                     PcdGet32 (PcdUsbTransferTimeoutValue),
                     NULL,
                     0
                     );
}

/**
  Configure a usb device to Configuration 1.

  @param  PeiServices        General-purpose services that are available to every PEIM.
  @param  UsbIoPpi           Indicates the PEI_USB_IO_PPI instance.

  @retval EFI_SUCCESS       Usb device is set to use Configuration 1 successfully.
  @retval EFI_DEVICE_ERROR  Cannot set the usb device due to a hardware error.
  @retval Others            Other failure occurs.

**/
EFI_STATUS
PeiUsbSetConfiguration (
  IN EFI_PEI_SERVICES  **PeiServices,
  IN PEI_USB_IO_PPI    *UsbIoPpi
  )
{
  EFI_USB_DEVICE_REQUEST  DevReq;

  ZeroMem (&DevReq, sizeof (EFI_USB_DEVICE_REQUEST));

  DevReq.RequestType = USB_DEV_SET_CONFIGURATION_REQ_TYPE;
  DevReq.Request     = USB_DEV_SET_CONFIGURATION;
  DevReq.Value       = 1;

  return UsbIoPpi->UsbControlTransfer (
                     PeiServices,
                     UsbIoPpi,
                     &DevReq,
                     EfiUsbNoData,
                     PcdGet32 (PcdUsbTransferTimeoutValue),
                     NULL,
                     0
                     );
}

/**
  Judge if the port is connected with a usb device or not.

  @param  PortStatus  The usb port status gotten.

  @retval TRUE        A usb device is connected with the port.
  @retval FALSE       No usb device is connected with the port.

**/
BOOLEAN
IsPortConnect (
  IN UINT16  PortStatus
  )
{
  //
  // return the bit 0 value of PortStatus
  //
  if ((PortStatus & USB_PORT_STAT_CONNECTION) != 0) {
    return TRUE;
  } else {
    return FALSE;
  }
}

/**
  Get device speed according to port status.

  @param    PortStatus  The usb port status gotten.

  @return   Device speed value.

**/
UINTN
PeiUsbGetDeviceSpeed (
  IN UINT16  PortStatus
  )
{
  if ((PortStatus & USB_PORT_STAT_LOW_SPEED) != 0) {
    return EFI_USB_SPEED_LOW;
  } else if ((PortStatus & USB_PORT_STAT_HIGH_SPEED) != 0) {
    return EFI_USB_SPEED_HIGH;
  } else if ((PortStatus & USB_PORT_STAT_SUPER_SPEED) != 0) {
    return EFI_USB_SPEED_SUPER;
  } else {
    return EFI_USB_SPEED_FULL;
  }
}