/** @file
  ACPI Sata PUIS Enablement

@copyright
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  This file contains a 'Sample Driver' and is licensed as such under the terms
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@par Specification Reference:
**/

Name (GTF0, Buffer (0x7) {0x00,0x00,0x00,0x00,0x00,0xA0,0x00})

//
// Set Device Data Method
// Arg0 - A Buffer containing an ATA drive identify block, contents described by the ATA
//
Method (_SDD, 0x1, NotSerialized) {
  CreateByteField(GTF0, 0x0, FEAT)
  CreateByteField(GTF0, 0x6, CMMD)
  CreateWordField(Arg0, 0xA6, W083)  // Identify Device Data Word 83
  CreateWordField(Arg0, 0xAC, W086)  // Identify Device Data Word 86

  If (LEqual(SizeOf(Arg0), 0x200)) {  // 256 WORD Data Block by OSPM to send 0xEC Command to Device
    // Check if PUIS feature is supported (Word 83 Bit5)
    If (LEqual (And (W083, 0x0020), 0x0020)) {
      // Check enable state (Word 86 Bit5)
      If (LEqual (And (W086, 0x0020), 0)) {
        // Issue Set Feature EFh, subcommand 06h to enable PUIS
        Store (0x06, FEAT)
        Store (0xEF, CMMD)
      }
    }
  }
}

//
// Get Task File Method
//
// @return 0 - A Buffer containing a byte stream of ATA commands for the drive
//
Method(_GTF, 0, NotSerialized) {
  return (GTF0)

}