soc/intel/apollolake: Add PNP config

1. Programs PNP values for AUNIT, BUNIT & TUNIT registers
as per reference code.
2. A new configuration option pnp_settings is introduced in
devicetree.cb to select PNP settings among performance,
power, power & performance.

TEST = built and booted glkrvp, verfied that the callback gets
control, verified warm and cold reboots.

Change-Id: Ibd70a42c9406941c8a93cc972f22c2475e9d0200
Signed-off-by: Divya Chellap <divya.chellappa@intel.com>
Reviewed-on: https://review.coreboot.org/22488
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Aaron Durbin <adurbin@chromium.org>

1 files changed, 67 insertions, 0 deletions

diff --git a/src/soc/intel/apollolake/pnpconfig.c b/src/soc/intel/apollolake/pnpconfig.c
new file mode 100644
index 0000000000..f9d493ed3e
--- /dev/null
+++ b/src/soc/intel/apollolake/pnpconfig.c
@@ -0,0 +1,67 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2017 Intel Corporation.
+ *
+ * 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.
+*/
+
+#include <bootstate.h>
+#include <console/console.h>
+#include <intelblocks/pcr.h>
+#include <soc/pci_devs.h>
+#include <soc/pnpconfig.h>
+#include "chip.h"
+
+static const struct pnpconfig perf[] = {
+	VALUEFORPERF_MSG_VALUES_PLATFORM_DEFAULT,
+};
+
+static const struct pnpconfig power[] = {
+	VALUEFORPOWER_MSG_VALUES_PLATFORM_DEFAULT,
+};
+
+static const struct pnpconfig power_perf[] = {
+	VALUEFORPWRPERF_MSG_VALUES_PLATFORM_DEFAULT,
+};
+
+static void pnp_settings(void *unused)
+{
+	int index;
+	size_t arrsize;
+	const struct pnpconfig *pnpconfigarr;
+	struct device *dev = SA_DEV_ROOT;
+	struct soc_intel_apollolake_config *config = dev->chip_info;
+	switch (config->pnp_settings) {
+	case PNP_PERF:
+		pnpconfigarr = perf;
+		arrsize = ARRAY_SIZE(perf);
+		break;
+	case PNP_POWER:
+		pnpconfigarr = power;
+		arrsize = ARRAY_SIZE(power);
+		break;
+	case PNP_PERF_POWER:
+		pnpconfigarr = power_perf;
+		arrsize = ARRAY_SIZE(power_perf);
+		break;
+	default:
+		printk(BIOS_NOTICE, "Invalid PNP settings selected");
+		return;
+	}
+
+	for (index = 0; index < arrsize; index++)
+		pcr_rmw32(pnpconfigarr[index].msgport,
+			  pnpconfigarr[index].msgregaddr,
+			  pnpconfigarr[index].mask,
+			  pnpconfigarr[index].value);
+}
+
+BOOT_STATE_INIT_ENTRY(BS_DEV_INIT, BS_ON_EXIT, pnp_settings, NULL);