baytrail: Add SOC thermal settings

Apply the SOC thermal settings from DPTF reference code for
SdpProfile=4 and adjust graphics PUNIT setting to match.

BUG=chrome-os-partner:17279
BRANCH=baytrail
TEST=boot on rambi and check for valid GPU power values from DPTF

Change-Id: I59fc4b75b52084ebcc4c0556563afca0585ea6b8
Signed-off-by: Duncan Laurie <dlaurie@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/182786
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Signed-off-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-on: http://review.coreboot.org/5052
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
Reviewed-by: Kyösti Mälkki <kyosti.malkki@gmail.com>

1 files changed, 54 insertions, 0 deletions

diff --git a/src/soc/intel/baytrail/dptf.c b/src/soc/intel/baytrail/dptf.c
new file mode 100644
index 0000000000..691e220abc
--- /dev/null
+++ b/src/soc/intel/baytrail/dptf.c
@@ -0,0 +1,54 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2014 Google Inc.
+ *
+ * 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.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include <stdint.h>
+#include <arch/io.h>
+#include <bootstate.h>
+#include <console/console.h>
+#include <reg_script.h>
+#include <baytrail/iosf.h>
+
+static const struct reg_script dptf_init_settings[] = {
+	/* SocThermInit */
+	REG_IOSF_WRITE(IOSF_PORT_PMC, PUNIT_PTMC, 0x00030708),
+	REG_IOSF_WRITE(IOSF_PORT_PMC, PUNIT_GFXT, 0x0000C000),
+	REG_IOSF_WRITE(IOSF_PORT_PMC, PUNIT_VEDT, 0x00000004),
+	REG_IOSF_WRITE(IOSF_PORT_PMC, PUNIT_ISPT, 0x00000004),
+	REG_IOSF_WRITE(IOSF_PORT_PMC, PUNIT_PTPS, 90 << 24), /* Tj_max=90C */
+	REG_IOSF_WRITE(IOSF_PORT_PMC, PUNIT_TE_AUX3, 0x00061029),
+	REG_IOSF_WRITE(IOSF_PORT_PMC, PUNIT_TTE_VRIccMax, 0x00061029),
+	REG_IOSF_WRITE(IOSF_PORT_PMC, PUNIT_TTE_VRHot, 0x00061029),
+	REG_IOSF_WRITE(IOSF_PORT_PMC, PUNIT_TTE_XXPROCHOT, 0x00061029),
+	REG_IOSF_WRITE(IOSF_PORT_PMC, PUNIT_TTE_SLM0, 0x00001029),
+	REG_IOSF_WRITE(IOSF_PORT_PMC, PUNIT_TTE_SLM1, 0x00001029),
+	/* ratio 10 = 1333mhz for 2.5W fanless */
+	REG_IOSF_WRITE(IOSF_PORT_PMC, PUNIT_SOC_POWER_BUDGET, 0x00000A00),
+	REG_IOSF_WRITE(IOSF_PORT_PMC, PUNIT_SOC_ENERGY_CREDIT, 0x00000002),
+	REG_SCRIPT_END,
+};
+
+static void dptf_init(void *unused)
+{
+	printk(BIOS_DEBUG, "Applying SOC Thermal settings for DPTF.\n");
+	reg_script_run(dptf_init_settings);
+}
+
+BOOT_STATE_INIT_ENTRIES(dptf_init_bscb) = {
+	BOOT_STATE_INIT_ENTRY(BS_DEV_INIT, BS_ON_ENTRY, dptf_init, NULL),
+};