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/* SPDX-License-Identifier: GPL-2.0-only */
/* Include in each PCIe Root Port device */
/* lowest D-state supported by
* PCIe root port during S0 state
*/
Name (_S0W, 4)
Name (PDST, 0) /* present Detect status */
/* Dynamic Opregion needed to access registers
* when the controller is in D3 cold
*/
OperationRegion (PX01, PCI_Config, 0x00, 0xFF)
Field (PX01, AnyAcc, NoLock, Preserve)
{
Offset(0x5A),
, 6,
PDS, 1, /* 6, Presence detect Change */
Offset(0xE2), /* RPPGEN - Root Port Power Gating Enable */
, 2,
L23E, 1, /* 2, L23_Rdy Entry Request (L23ER) */
L23R, 1, /* 3, L23_Rdy to Detect Transition (L23R2DT) */
Offset(0xF4), /* BLKPLLEN */
, 10,
BPLL, 1,
}
OperationRegion (PX02, PCI_Config, 0x338, 0x4)
Field (PX02, AnyAcc, NoLock, Preserve)
{
, 26,
BDQA, 1 /* BLKDQDA */
}
PowerResource (PXP, 0, 0)
{
/* Define the PowerResource for PCIe slot */
Method (_STA, 0, Serialized)
{
Store (PDS, PDST)
If (LEqual (PDS, 1)) {
Return (0xf)
} Else {
Return (0)
}
}
Method (_ON, 0, Serialized)
{
If (LAnd (LEqual (PDST, 1), LNotEqual (\PRT0, 0))) {
/* Enter this condition if device
* is connected
*/
/* De-assert PERST */
\_SB.PCI0.PRDA (\PRT0)
Store (0, BDQA) /* Set BLKDQDA to 0 */
Store (0, BPLL) /* Set BLKPLLEN to 0 */
/* Set L23_Rdy to Detect Transition
* (L23R2DT)
*/
Store (1, L23R)
Sleep (16)
Store (0, Local0)
/* Delay for transition Detect
* and link to train
*/
While (L23R) {
If (Lgreater (Local0, 4)) {
Break
}
Sleep (16)
Increment (Local0)
}
} /* End PDS condition check */
}
Method (_OFF, 0, Serialized)
{
/* Set L23_Rdy Entry Request (L23ER) */
If (LAnd (LEqual (PDST, 1), LNotEqual (\PRT0, 0))) {
/* enter this condition if device
* is connected
*/
Store (1, L23E)
Sleep (16)
Store (0, Local0)
While (L23E) {
If (Lgreater (Local0, 4)) {
Break
}
Sleep (16)
Increment (Local0)
}
Store (1, BDQA) /* Set BLKDQDA to 1 */
Store (1, BPLL) /* Set BLKPLLEN to 1 */
/* Assert PERST */
\_SB.PCI0.PRAS (\PRT0)
} /* End PDS condition check */
} /* End of Method_OFF */
} /* End PXP */
Name(_PR0, Package() { PXP })
Name(_PR3, Package() { PXP })
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