mb/*: Use common IPMI KCS driver

Remove duplicated code and instead use the IPMI KCS driver, which provides
the same functionality.

Change-Id: I419713c9bef02084cca1ff4cf11c33c2e3e8d3c1
Signed-off-by: Patrick Rudolph <patrick.rudolph@9elements.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/33490
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Andrey Petrov <anpetrov@fb.com>

src/mainboard/asus/kgpe-d16/Kconfig

@@ -32,6 +32,7 @@ config BOARD_SPECIFIC_OPTIONS
 	select DRIVERS_ASPEED_AST2050
 	select MAINBOARD_FORCE_NATIVE_VGA_INIT
 	select POWER_STATE_DEFAULT_ON_AFTER_FAILURE
+	select IPMI_KCS
 
 config MAINBOARD_DIR
 	string

src/mainboard/asus/kgpe-d16/devicetree.cb

@@ -217,7 +217,7 @@ chip northbridge/amd/amdfam10/root_complex	# Root complex
 						chip drivers/pc80/tpm
 							device pnp 4e.0 on end		# TPM module
 						end
-						chip drivers/generic/generic		# BMC KCS
+						chip drivers/ipmi		# BMC KCS
 							device pnp ca2.0 on end
 						end
 					end

src/mainboard/asus/kgpe-d16/dsdt.asl

@@ -53,9 +53,6 @@ DefinitionBlock (
 
 	#include <southbridge/amd/common/acpi/sleepstates.asl>
 
-	/* IPMI KCS enable */
-	Name (KCSE, 0x1)
-
 	/* The _PIC method is called by the OS to choose between interrupt
 		* routing via the i8259 interrupt controller or the APIC.
 		*
@@ -489,13 +486,6 @@ DefinitionBlock (
 				Name (_HID, EisaId ("PNP0A05"))
 				Name (_ADR, 0x00140003)
 
-				OperationRegion (BMRG, SystemIO, 0xca2, 0x02) /* BMC KCS registers */
-				Field (BMRG, AnyAcc, NoLock, Preserve)
-				{
-					BMRI, 8,	/* Index */
-					BMRD, 8,	/* Data */
-				}
-
 				/* Real Time Clock Device */
 				Device(RTC0) {
 					Name(_HID, EISAID("PNP0B00"))   /* AT Real Time Clock (not PIIX4 compatible) */
@@ -617,27 +607,6 @@ DefinitionBlock (
 						})
 					}
 				}
-
-				Device (KCS1) {   /* IPMI KCS */
-					Name (_HID, EISAID ("IPI0001"))		/* ASpeed BMC */
-					Method (_STA, 0, NotSerialized) {
-						If (KCSE) {			/* Detection enabled */
-							If (LNotEqual (BMRD, 0xff)) {
-								Return (0x0f)	/* Device present */
-							}
-							Return (Zero)
-						}
-						Return (Zero)
-					}
-					Method (_CRS, 0) {
-						Return (ResourceTemplate() {
-							IO(Decode16, 0x0ca2, 0x0ca2, 0x01, 0x02)
-						})
-					}
-					Method (_IFT, 0, NotSerialized) {	/* Interface type */
-						Return (One)			/* KCS interface */
-					}
-				}
 			}
 
 			/* High Precision Event Timer */

src/mainboard/asus/kgpe-d16/mainboard.c

@@ -47,7 +47,6 @@ void set_pcie_dereset(void)
 * enable the dedicated function in kgpe-d16 board.
 * This function is called earlier than sr5650_enable.
 *************************************************/
-#define BMC_KCS_BASE 0xca2
 
 static void mainboard_enable(struct device *dev)
 {
@@ -69,13 +68,6 @@ static void mainboard_enable(struct device *dev)
 
 	set_pcie_dereset();
 	/* get_ide_dma66(); */
-
-	/* Enable access to the BMC IPMI via KCS */
-	struct device *lpc_sio_dev = dev_find_slot_pnp(BMC_KCS_BASE, 0);
-	struct resource *res = new_resource(lpc_sio_dev, BMC_KCS_BASE);
-	res->base = BMC_KCS_BASE;
-	res->size = 1;
-	res->flags = IORESOURCE_IO | IORESOURCE_ASSIGNED | IORESOURCE_FIXED;
 }
 
 /* override the default SATA PHY setup */