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/*
* This file is part of the coreboot project.
*
* Copyright (C) 2015 Timothy Pearson <tpearson@raptorengineeringinc.com>, Raptor Engineering
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 2 of the License.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
/* WARNING
* Switchable graphics not yet tested!
*/
/* Hybrid graphics enable/disable GPIO bitfields */
Name (HYG1, 0x004A0000)
Name (HYG2, 0x00020000)
/* GPIO control port */
Name (GPCP, DEFAULT_GPIOBASE)
/* GPIO control map */
OperationRegion (GPCM, SystemIO, GPCP, 0x3F)
Field (GPCM, ByteAcc, NoLock, Preserve) {
GPUS, 32,
GPIS, 32,
Offset (0x0C),
GPLV, 32,
Offset (0x30),
GQUS, 32,
GQIS, 32,
GQLV, 32
}
Method(SHYB, 1) {
/* Switch hybrid graphics */
if (LEqual(Arg0, One))
{
/* Discrete graphics requested */
Or(GPLV, HYG1, GPLV)
Or(GQLV, HYG2, GQLV)
}
else
{
/* Integrated graphics requested */
Xor(HYG1, 0xFFFFFFFF, Local0)
And(GPLV, Local0, GPLV)
Xor(HYG2, 0xFFFFFFFF, Local0)
And(GQLV, Local0, GQLV)
}
}
Method (ATPX, 2, Serialized) {
/* Create local variables */
Name (ATPR, Buffer (0x08) {
0x0, 0x0, 0x0, 0x0,
0x0, 0x0, 0x0, 0x0
})
CreateWordField (ATPR, 0x00, SIZE)
CreateWordField (ATPR, 0x02, VERS)
CreateDWordField (ATPR, 0x04, FUNC)
/* Version request */
if (LEqual(Arg0, 0x0))
{
/* Assemble and return version information */
Store (0x08, SIZE) /* Response length */
Store (0x01, VERS) /* Version number */
Store (0x0F, FUNC) /* Supported functions? */
Return (ATPR)
}
/* Mux select */
if (LEqual(Arg0, 0x2))
{
CreateByteField (Arg1, 0x02, PWST)
Store (PWST, Local0)
And (Local0, 0x01, Local0)
If (Local0)
{
/* Enable discrete graphics */
SHYB(0x01)
}
else
{
/* Enable integrated graphics */
SHYB(0x00)
}
}
Return(Zero)
}
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