drivers/intel/dptf: Add new thermal control mechanism for pch device

Add new thermal control mechanism for pch device under dptf driver.
This provides support of different control knobs for FIVR.

BUG=b:198582766
BRANCH=None
TEST=Build FW and test on brya0 board

Change-Id: I035d2844b9ba6a9532ae006fc1c43e34cb94328a
Signed-off-by: Sumeet Pawnikar <sumeet.r.pawnikar@intel.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/57096
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Tim Wawrzynczak <twawrzynczak@chromium.org>

src/drivers/intel/dptf/Kconfig

@@ -5,3 +5,10 @@ config DRIVERS_INTEL_DPTF
 	help
 	   When enabled, entries in the devicetree are used to generate
 	   Intel DPTF Tables at runtime in the SSDT.
+
+config DRIVERS_INTEL_DPTF_SUPPORTS_TPCH
+	def_bool n
+	depends on HAVE_ACPI_TABLES && PMC_IPC_ACPI_INTERFACE
+	help
+	  When enabled, chip driver/intel/dptf will publish information to the
+	  SSDT for the TPCH device.

src/drivers/intel/dptf/dptf.c

@@ -4,6 +4,7 @@
 #include <acpi/acpigen_pci.h>
 #include <console/console.h>
 #include <device/device.h>
+#include <intelblocks/pmc_ipc.h>
 #include "chip.h"
 #include "dptf.h"
 
@@ -194,7 +195,50 @@ static void write_generic_devices(const struct drivers_intel_dptf_config *config
 	}
 }
 
-/* \_SB.DPTF - note: leaves the Scope open for child devices*/
+/* \_SB.DPTF.TPCH.RFC methods */
+static void write_tpch_rfc_methods(const char *tpch_rfc_method_name,
+				unsigned int ipc_subcmd_ctrl_value)
+{
+	acpigen_write_method_serialized(tpch_rfc_method_name, 1);
+	acpigen_emit_namestring("IPCS");
+	acpigen_write_integer(PMC_IPC_CMD_COMMAND_FIVR);
+	acpigen_write_integer(PMC_IPC_CMD_CMD_ID_FIVR_WRITE);
+	acpigen_write_integer(0x8);
+	acpigen_write_integer(ipc_subcmd_ctrl_value);
+	acpigen_emit_byte(ARG0_OP);
+	acpigen_write_dword(0);
+	acpigen_write_dword(0);
+	/* The reason for returning a value here is a W/A for the ESIF shell */
+	acpigen_emit_byte(RETURN_OP);
+	acpigen_write_package(0);
+	acpigen_write_package_end();
+	acpigen_write_method_end();
+}
+
+static void write_create_tpch(const struct dptf_platform_info *platform_info)
+{
+	acpigen_write_device("TPCH");
+	acpigen_write_name("_HID");
+	dptf_write_hid(platform_info->use_eisa_hids, platform_info->tpch_device_hid);
+	acpigen_write_name_integer("_UID", 0);
+	acpigen_write_STA(ACPI_STATUS_DEVICE_ALL_ON);
+}
+
+static void write_tpch_methods(const struct dptf_platform_info *platform_info)
+{
+	write_create_tpch(platform_info);
+
+	/* Create RFC0 method */
+	write_tpch_rfc_methods(platform_info->tpch_rfc0_method,
+			PMC_IPC_SUBCMD_RFI_CTRL0_LOGIC);
+	/* Create RFC1 method */
+	write_tpch_rfc_methods(platform_info->tpch_rfc1_method,
+			PMC_IPC_SUBCMD_RFI_CTRL4_LOGIC);
+
+	acpigen_write_device_end(); /* TPCH Device */
+}
+
+/* \_SB.DPTF - note: leaves the Scope open for child devices */
 static void write_open_dptf_device(const struct device *dev,
 				   const struct dptf_platform_info *platform_info)
 {
@@ -229,6 +273,9 @@ static void write_device_definitions(const struct device *dev)
 	write_imok();
 	write_generic_devices(config, platform_info);
 
+	if (CONFIG(DRIVERS_INTEL_DPTF_SUPPORTS_TPCH))
+		write_tpch_methods(platform_info);
+
 	acpigen_pop_len(); /* DPTF Device (write_open_dptf_device) */
 	acpigen_pop_len(); /* Scope */
 }

src/drivers/intel/dptf/dptf.h

@@ -14,6 +14,9 @@ struct dptf_platform_info {
 	const char *dptf_device_hid;
 	const char *generic_hid;
 	const char *fan_hid;
+	const char *tpch_device_hid;
+	const char *tpch_rfc0_method;
+	const char *tpch_rfc1_method;
 };
 
 const struct dptf_platform_info *get_dptf_platform_info(void);