soc/intel/tigerlake: Add config option for S3 ACPI

Add Kconfig option `SOC_INTEL_TIGERLAKE_S3` which will adjust
the ACPI to not offer D3Cold when using S3.

Signed-off-by: Sean Rhodes <sean@starlabs.systems>
Change-Id: Ieb1cc3d6a03cb452ff38ae393a993e881d9b5ff4
Reviewed-on: https://review.coreboot.org/c/coreboot/+/59024
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Tim Wawrzynczak <twawrzynczak@chromium.org>

5 files changed, 186 insertions, 123 deletions

diff --git a/src/soc/intel/tigerlake/Kconfig b/src/soc/intel/tigerlake/Kconfig
index 91f33161b4..a7b3ae447d 100644
--- a/src/soc/intel/tigerlake/Kconfig
+++ b/src/soc/intel/tigerlake/Kconfig
@@ -187,6 +187,12 @@ config SOC_INTEL_I2C_DEV_MAX
 	int
 	default 6
 
+config SOC_INTEL_TIGERLAKE_S3
+	bool
+	default n
+	help
+	  Select if using S3 instead of S0ix to disable D3Cold
+
 config SOC_INTEL_UART_DEV_MAX
 	int
 	default 3
diff --git a/src/soc/intel/tigerlake/acpi/tcss.asl b/src/soc/intel/tigerlake/acpi/tcss.asl
index cdbf0cc7f4..1d58bfb520 100644
--- a/src/soc/intel/tigerlake/acpi/tcss.asl
+++ b/src/soc/intel/tigerlake/acpi/tcss.asl
@@ -41,6 +41,12 @@
 
 Scope (\_SB)
 {
+#if CONFIG(SOC_INTEL_TIGERLAKE_S3)
+	Name (S0IX, 0)
+#else
+	Name (S0IX, 1)
+#endif
+
 	/* Device base address */
 	Method (BASE, 1)
 	{
@@ -673,116 +679,118 @@ Scope (\_SB.PCI0)
 		}
 	}
 
-	Method (TCON, 0)
-	{
-		/* Reset IOM D3 cold bit if it is in D3 cold now. */
-		If (TD3C == 1)  /* It was in D3 cold before. */
+	If (S0IX == 1) {
+		Method (TCON, 0)
 		{
-			/* Reset IOM D3 cold bit. */
-			TD3C = 0    /* Request IOM for D3 cold exit sequence. */
-			Local0 = 0  /* Time check counter variable */
-			/* Wait for ack, the maximum wait time for the ack is 100 msec. */
-			While ((TACK != 0) && (Local0 < TCSS_IOM_ACK_TIMEOUT_IN_MS)) {
-				/*
-				 * Wait in this loop until TACK becomes 0 with timeout
-				 * TCSS_IOM_ACK_TIMEOUT_IN_MS by default.
-				 */
-				Sleep (1)  /* Delay of 1ms. */
-				Local0++
-			}
-
-			If (Local0 == TCSS_IOM_ACK_TIMEOUT_IN_MS) {
-				Printf("Error: Timeout occurred.")
-			}
-			Else
+			/* Reset IOM D3 cold bit if it is in D3 cold now. */
+			If (TD3C == 1)  /* It was in D3 cold before. */
 			{
-				/*
-				 * Program IOP MCTP Drop (TCSS_IN_D3) after D3 cold exit and
-				 * acknowledgement by IOM.
-				 */
-				TCD3 = 0
-				/*
-				 * If the TCSS Deven is cleared by BIOS Mailbox request, then
-				 * restore to previously saved value of TCSS DEVNE.
-				 */
-				Local0 = 0
-				While (\_SB.PCI0.TXHC.VDID == 0xFFFFFFFF) {
-					If (DSGS () == 1) {
-						DSCR (0)
-					}
+				/* Reset IOM D3 cold bit. */
+				TD3C = 0    /* Request IOM for D3 cold exit sequence. */
+				Local0 = 0  /* Time check counter variable */
+				/* Wait for ack, the maximum wait time for the ack is 100 msec. */
+				While ((TACK != 0) && (Local0 < TCSS_IOM_ACK_TIMEOUT_IN_MS)) {
+					/*
+					 * Wait in this loop until TACK becomes 0 with timeout
+					 * TCSS_IOM_ACK_TIMEOUT_IN_MS by default.
+					 */
+					Sleep (1)  /* Delay of 1ms. */
 					Local0++
-					If (Local0 == 5) {
-						Printf("pCode mailbox command failed.")
-						Break
+				}
+
+				If (Local0 == TCSS_IOM_ACK_TIMEOUT_IN_MS) {
+					Printf("Error: Timeout occurred.")
+				}
+				Else
+				{
+					/*
+					 * Program IOP MCTP Drop (TCSS_IN_D3) after D3 cold exit and
+					 * acknowledgement by IOM.
+					 */
+					TCD3 = 0
+					/*
+					 * If the TCSS Deven is cleared by BIOS Mailbox request, then
+					 * restore to previously saved value of TCSS DEVNE.
+					 */
+					Local0 = 0
+					While (\_SB.PCI0.TXHC.VDID == 0xFFFFFFFF) {
+						If (DSGS () == 1) {
+							DSCR (0)
+						}
+						Local0++
+						If (Local0 == 5) {
+							Printf("pCode mailbox command failed.")
+							Break
+						}
 					}
 				}
 			}
+			Else {
+				Printf("Drop TCON due to it is already exit D3 cold.")
+			}
 		}
-		Else {
-			Printf("Drop TCON due to it is already exit D3 cold.")
-		}
-	}
 
-	Method (TCOF, 0)
-	{
-		If ((\_SB.PCI0.TXHC.SD3C != 0) || (\_SB.PCI0.TDM0.SD3C != 0)
-					       || (\_SB.PCI0.TDM1.SD3C != 0))
+		Method (TCOF, 0)
 		{
-			Printf("Skip D3C entry.")
-			Return
-		}
-
-		/*
-		 * If the TCSS Deven in normal state, then Save current TCSS DEVEN value and
-		 * clear it.
-		 */
-		Local0 = 0
-		While (\_SB.PCI0.TXHC.VDID != 0xFFFFFFFF) {
-			If (DSGS () == 0) {
-				DSCR (1)
-			}
-			Local0++
-			If (Local0 == 5) {
-				Printf("pCode mailbox command failed.")
-				Break
+			If ((\_SB.PCI0.TXHC.SD3C != 0) || (\_SB.PCI0.TDM0.SD3C != 0)
+						       || (\_SB.PCI0.TDM1.SD3C != 0))
+			{
+				Printf("Skip D3C entry.")
+				Return
 			}
-		}
-
-		/*
-		 * Program IOM MCTP Drop (TCSS_IN_D3) in D3Cold entry before entering D3 cold.
-		 */
-		TCD3 = 1
 
-		/* Request IOM for D3 cold entry sequence. */
-		TD3C = 1
-	}
+			/*
+			 * If the TCSS Deven in normal state, then Save current TCSS DEVEN value and
+			 * clear it.
+			 */
+			Local0 = 0
+			While (\_SB.PCI0.TXHC.VDID != 0xFFFFFFFF) {
+				If (DSGS () == 0) {
+					DSCR (1)
+				}
+				Local0++
+				If (Local0 == 5) {
+					Printf("pCode mailbox command failed.")
+					Break
+				}
+			}
 
-	PowerResource (D3C, 5, 0)
-	{
-		/*
-		 * Variable to save power state
-		 * 1 - TC Cold request cleared.
-		 * 0 - TC Cold request sent.
-		 */
-		Name (STAT, 0x1)
+			/*
+			 * Program IOM MCTP Drop (TCSS_IN_D3) in D3Cold entry before entering D3 cold.
+			 */
+			TCD3 = 1
 
-		Method (_STA, 0)
-		{
-			Return (STAT)
+			/* Request IOM for D3 cold entry sequence. */
+			TD3C = 1
 		}
 
-		Method (_ON, 0)
+		PowerResource (D3C, 5, 0)
 		{
-			\_SB.PCI0.TCON()
-			STAT = 1
-		}
+			/*
+			 * Variable to save power state
+			 * 1 - TC Cold request cleared.
+			 * 0 - TC Cold request sent.
+			 */
+			Name (STAT, 0x1)
 
-		Method (_OFF, 0)
-		{
-			\_SB.PCI0.TCOF()
-			STAT = 0
+			Method (_STA, 0)
+			{
+				Return (STAT)
+			}
+
+			Method (_ON, 0)
+			{
+				\_SB.PCI0.TCON()
+				STAT = 1
+			}
+
+			Method (_OFF, 0)
+			{
+				\_SB.PCI0.TCOF()
+				STAT = 0
+			}
 		}
-	}
+	} /* End: S0IX */
 
 	/*
 	 * TCSS xHCI device
diff --git a/src/soc/intel/tigerlake/acpi/tcss_dma.asl b/src/soc/intel/tigerlake/acpi/tcss_dma.asl
index 273a71ec48..ff0c5a9a47 100644
--- a/src/soc/intel/tigerlake/acpi/tcss_dma.asl
+++ b/src/soc/intel/tigerlake/acpi/tcss_dma.asl
@@ -27,24 +27,48 @@ Name (STAT, 0x1)  /* Variable to save power state 1 - D0, 0 - D3C */
 
 Method (_S0W, 0x0)
 {
-	Return (0x4)
+	If (S0IX == 1) {
+		Return (0x04)
+	} Else {
+		Return (0x03)
+	}
 }
 
+/*
+ * Get power resources that are dependent on this device for Operating System Power Management
+ * to put the device in the D0 device state
+ */
 Method (_PR0)
 {
-	If (DUID == 0) {
-		Return (Package() { \_SB.PCI0.D3C, \_SB.PCI0.TBT0 })
+	If (S0IX == 1) {
+		If (DUID == 0) {
+			Return (Package() { \_SB.PCI0.D3C, \_SB.PCI0.TBT0 })
+		} Else {
+			Return (Package() { \_SB.PCI0.D3C, \_SB.PCI0.TBT1 })
+		}
 	} Else {
-		Return (Package() { \_SB.PCI0.D3C, \_SB.PCI0.TBT1 })
+		If (DUID == 0) {
+			Return (Package() { \_SB.PCI0.TBT0 })
+		} Else {
+			Return (Package() { \_SB.PCI0.TBT1 })
+		}
 	}
 }
 
 Method (_PR3)
 {
-	If (DUID == 0) {
-		Return (Package() { \_SB.PCI0.D3C, \_SB.PCI0.TBT0 })
+	If (S0IX == 1) {
+		If (DUID == 0) {
+			Return (Package() { \_SB.PCI0.D3C, \_SB.PCI0.TBT0 })
+		} Else {
+			Return (Package() { \_SB.PCI0.D3C, \_SB.PCI0.TBT1 })
+		}
 	} Else {
-		Return (Package() { \_SB.PCI0.D3C, \_SB.PCI0.TBT1 })
+		If (DUID == 0) {
+			Return (Package() { \_SB.PCI0.TBT0 })
+		} Else {
+			Return (Package() { \_SB.PCI0.TBT1 })
+		}
 	}
 }
 
@@ -53,8 +77,8 @@ Method (_PR3)
  */
 Method (D3CX, 0, Serialized)
 {
-	DD3E = 0	/* Disable DMA RTD3 */
-	STAT = 0x1
+	DD3E = 0x00	/* Disable DMA RTD3 */
+	STAT = 0x01
 }
 
 /*
@@ -62,8 +86,8 @@ Method (D3CX, 0, Serialized)
  */
 Method (D3CE, 0, Serialized)
 {
-	DD3E = 1	/* Enable DMA RTD3 */
-	STAT = 0
+	DD3E = 0x01	/* Enable DMA RTD3 */
+	STAT = 0x00
 }
 
 /*
@@ -71,7 +95,6 @@ Method (D3CE, 0, Serialized)
  * TCSS D3 Cold and TBT RTD3 is only available when system power state is in S0.
  */
 Name (SD3C, 0)
-
 Method (_PS0, 0, Serialized)
 {
 }
diff --git a/src/soc/intel/tigerlake/acpi/tcss_pcierp.asl b/src/soc/intel/tigerlake/acpi/tcss_pcierp.asl
index 7576564dfb..6b26231c1b 100644
--- a/src/soc/intel/tigerlake/acpi/tcss_pcierp.asl
+++ b/src/soc/intel/tigerlake/acpi/tcss_pcierp.asl
@@ -267,25 +267,45 @@ Method (_PS3, 0, Serialized)
 
 Method (_S0W, 0x0, NotSerialized)
 {
-	Return (0x4)
+	If (S0IX == 1) {
+		Return (0x4)
+	} Else {
+		Return (0x3)
+	}
 }
 
 Method (_PR0)
 {
-        If ((TUID == 0) || (TUID == 1)) {
-                Return (Package() { \_SB.PCI0.D3C, \_SB.PCI0.TBT0 })
-        } Else {
-                Return (Package() { \_SB.PCI0.D3C, \_SB.PCI0.TBT1 })
-        }
+	If (S0IX == 1) {
+		If ((TUID == 0) || (TUID == 1)) {
+			Return (Package() { \_SB.PCI0.D3C, \_SB.PCI0.TBT0 })
+		} Else {
+			Return (Package() { \_SB.PCI0.D3C, \_SB.PCI0.TBT1 })
+		}
+	} Else {
+		If ((TUID == 0) || (TUID == 1)) {
+			Return (Package() { \_SB.PCI0.TBT0 })
+		} Else {
+			Return (Package() { \_SB.PCI0.TBT1 })
+		}
+	}
 }
 
 Method (_PR3)
 {
-        If ((TUID == 0) || (TUID == 1)) {
-                Return (Package() { \_SB.PCI0.D3C, \_SB.PCI0.TBT0 })
-        } Else {
-                Return (Package() { \_SB.PCI0.D3C, \_SB.PCI0.TBT1 })
-        }
+	If (S0IX == 1) {
+		If ((TUID == 0) || (TUID == 1)) {
+			Return (Package() { \_SB.PCI0.D3C, \_SB.PCI0.TBT0 })
+		} Else {
+			Return (Package() { \_SB.PCI0.D3C, \_SB.PCI0.TBT1 })
+		}
+	} Else {
+		If ((TUID == 0) || (TUID == 1)) {
+			Return (Package() { \_SB.PCI0.TBT0 })
+		} Else {
+			Return (Package() { \_SB.PCI0.TBT1 })
+		}
+	}
 }
 
 /*
diff --git a/src/soc/intel/tigerlake/acpi/tcss_xhci.asl b/src/soc/intel/tigerlake/acpi/tcss_xhci.asl
index acbeb30c13..32aa2f28bd 100644
--- a/src/soc/intel/tigerlake/acpi/tcss_xhci.asl
+++ b/src/soc/intel/tigerlake/acpi/tcss_xhci.asl
@@ -30,7 +30,11 @@ Method (_PS3, 0, Serialized)
 
 Method (_S0W, 0x0, NotSerialized)
 {
-	Return (0x4)
+	If (S0IX == 1) {
+		Return (0x4)
+	} Else {
+		Return (0x3)
+	}
 }
 
 /*
@@ -39,14 +43,16 @@ Method (_S0W, 0x0, NotSerialized)
  */
 Name (SD3C, 0)
 
-Method (_PR0)
-{
-	Return (Package () { \_SB.PCI0.D3C })
-}
+If (S0IX == 1) {
+	Method (_PR0)
+	{
+		Return (Package () { \_SB.PCI0.D3C })
+	}
 
-Method (_PR3)
-{
-	Return (Package () { \_SB.PCI0.D3C })
+	Method (_PR3)
+	{
+		Return (Package () { \_SB.PCI0.D3C })
+	}
 }
 
 /*