/** @file
  ACPI RTD3 SSDT table for PCIe 4G WWAN

@copyright
  INTEL CONFIDENTIAL
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  confidential information of Intel Corporation and its suppliers and licensors,
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  this notice or any other notice embedded in Materials by Intel or
  Intel's suppliers or licensors in any way.

  This file contains a 'Sample Driver' and is licensed as such under the terms
  of your license agreement with Intel or your vendor. This file may be modified
  by the user, subject to the additional terms of the license agreement.

@par Specification Reference:
**/

//
// PCIe slot power resource definition
//
PowerResource(PXP, 0, 0) {
  Method(_STA, 0, Serialized) {
    If (LEqual (VDID, 0xFFFFFFFF)) {
      Return(0)
    }
    Return(PSTA())
  }

  Method(_ON, 0, Serialized) {
    If (LEqual (VDID, 0xFFFFFFFF)) {
      Return()
    }

    If (LEqual(ONEN, 0)) {
      Return()
    }

    \_SB.SHPO(WAKG, 1)

    If(CondRefOf(WOFF)) {
      If(LNotEqual(WOFF, Zero)) {
        Divide(Subtract(Timer(), WOFF), 10000, , Local0) // Store Elapsed time in ms, ignore remainder
        If(LLess(Local0, 500)) {                          // If Elapsed time is less than 500ms
          Sleep(Subtract(500, Local0))                    // Sleep for the remaining time
        }
      }
    }

    //
    // Turn on slot power
    //
    PON()

    //
    // Trigger L2/L3 ready exit flow in rootport - transition link to Detect
    //
    L23D()

    // This time includes PCIe Detect Timer and PCIe Link Establishment Timer for modem. Time delay should
    // kick in L3 Path only
    If(CondRefOf(WOFF)) {
      If(LNotEqual(WOFF, Zero)) {
        Store(0, WOFF)
        Sleep(500)
      }
    }

    Store(1, OFEN)
    Store(0, ONEN)
  }

  Method(_OFF, 0, Serialized) {
    If (LEqual (VDID, 0xFFFFFFFF)) {
      Return()
    }

    If (LEqual(OFEN, 0)) {
      Return()
    }

    //
    // Trigger L2/L3 ready entry flow in rootport
    //
    DL23()

    //
    // Turn off slot power
    //
    POFF()

    If(LEqual(WKEN, 0)) {
      // Drive BB RESET Pin low
      \PIN.ON(BRST)
      Sleep(2) // 2ms
      \PIN.OFF(PWRG)          // Set power pin to low
      If(CondRefOf(WOFF)) {
        Store(Timer(), WOFF) // Start OFF timer here
      }
    }

    // Enable WAKE
    If(CondRefOf (WAKG)) {
      If(LAnd(LNotEqual(WAKG, 0), WKEN)) {
        \_SB.SHPO(WAKG, 0)
      } Else {
        \_SB.SHPO(WAKG, 1)
      }
    }

    Store(0, WKEN)
    Store(0, OFEN)
    Store(1, ONEN)
  }
}