soc/intel/alderlake: Configure the SKU specific parameters for VR domains

This patch configures the SKU specific power delivery parameters for the
VR domains.
+--------------+-------+-------+-------+-------+-----------+--------+
|      SKU     |Setting| AC LL | DC LL |ICC MAX|TDC Current|TDC Time|
|              |       |(mOhms)|(mOhms)|  (A)  |     (A)   |  (msec)|
+--------------+-------+-------+-------+-------+-----------+--------+
|ADL-P 682(45W)|   IA  |  2.3  |  2.3  |  160  |     57    | 28000  |
+              +-------+-------+-------+-------+-----------+--------+
|              |   GT  |  3.2  |  3.2  |   50  |     57    | 28000  |
+--------------+-------+-------+-------+-------+-----------+--------+
|ADL-P 482(28W)|   IA  |  2.3  |  2.3  |  109  |     40    | 28000  |
+              +-------+-------+-------+-------+-----------+--------+
|              |   GT  |  3.2  |  3.2  |   50  |     40    | 28000  |
+--------------+-------+-------+-------+-------+-----------+--------+
|ADL-P 282(15W)|   IA  |  2.8  |  2.8  |   80  |     20    | 28000  |
+              +-------+-------+-------+-------+-----------+--------+
|              |   GT  |  3.2  |  3.2  |   40  |     20    | 28000  |
+--------------+-------+-------+-------+-------+-----------+--------+

These config values are generated iPDG application with ADL-P platform
package tool and supports 15W/28W/45W SKU's.
RDC Kit ID for the iPDG tools,
* Intel(R) Platform Design Studio Installer: 610905.
* Intel(R) Platform Design Studio - Platform ADL-P (Partial): 627345.
* Intel(R) Platform Design Studio - Platform ADL-P (Full): 630261.

BUG=b:195033556

Signed-off-by: V Sowmya <v.sowmya@intel.com>
Change-Id: I434fd30b5bce3bfab5a5800a30317aaa04d9926a
Reviewed-on: https://review.coreboot.org/c/coreboot/+/56325
Reviewed-by: Tim Wawrzynczak <twawrzynczak@chromium.org>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

5 files changed, 198 insertions, 0 deletions

diff --git a/src/soc/intel/alderlake/Makefile.inc b/src/soc/intel/alderlake/Makefile.inc
index bb57560293ae..783a4453af16 100644
--- a/src/soc/intel/alderlake/Makefile.inc
+++ b/src/soc/intel/alderlake/Makefile.inc
@@ -43,6 +43,7 @@ ramstage-y += pmc.c
 ramstage-y += reset.c
 ramstage-y += soundwire.c
 ramstage-y += systemagent.c
+ramstage-y += vr_config.c
 ramstage-y += xhci.c
 ramstage-$(CONFIG_SOC_INTEL_CRASHLOG) += crashlog.c
 
diff --git a/src/soc/intel/alderlake/chip.h b/src/soc/intel/alderlake/chip.h
index 077a58df794f..248eedfd98af 100644
--- a/src/soc/intel/alderlake/chip.h
+++ b/src/soc/intel/alderlake/chip.h
@@ -15,6 +15,7 @@
 #include <soc/pmc.h>
 #include <soc/serialio.h>
 #include <soc/usb.h>
+#include <soc/vr_config.h>
 #include <stdint.h>
 
 /* Types of different SKUs */
@@ -391,6 +392,11 @@ struct soc_intel_alderlake_config {
 		/* External Icc Max for VnnSx rail in mA  */
 		int vnn_icc_max_ma;
 	} ext_fivr_settings;
+
+	/* VrConfig Settings.
+	* 0 = VR_DOMAIN_IA Core 1 = VR_DOMAIN_GT.
+	*/
+	struct vr_config domain_vr_config[NUM_VR_DOMAINS];
 };
 
 typedef struct soc_intel_alderlake_config config_t;
diff --git a/src/soc/intel/alderlake/fsp_params.c b/src/soc/intel/alderlake/fsp_params.c
index 3d08573d2c6c..cb4552d3fee2 100644
--- a/src/soc/intel/alderlake/fsp_params.c
+++ b/src/soc/intel/alderlake/fsp_params.c
@@ -615,6 +615,10 @@ static void fill_fsps_misc_power_params(FSP_S_CONFIG *s_cfg,
 
 	/* VccIn Aux Imon IccMax. Values are in 1/4 Amp increments and range is 0-512. */
 	s_cfg->VccInAuxImonIccImax = get_vccin_aux_imon_iccmax() * 4 / MILLIAMPS_TO_AMPS;
+
+	/* VrConfig Settings for IA and GT domains */
+	for (size_t i = 0; i < ARRAY_SIZE(config->domain_vr_config); i++)
+		fill_vr_domain_config(s_cfg, i, &config->domain_vr_config[i]);
 }
 
 static void fill_fsps_irq_params(FSP_S_CONFIG *s_cfg,
diff --git a/src/soc/intel/alderlake/include/soc/vr_config.h b/src/soc/intel/alderlake/include/soc/vr_config.h
new file mode 100644
index 000000000000..3bf3c4adca3b
--- /dev/null
+++ b/src/soc/intel/alderlake/include/soc/vr_config.h
@@ -0,0 +1,71 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+/* VR Settings for each domain */
+
+#ifndef _SOC_VR_CONFIG_H_
+#define _SOC_VR_CONFIG_H_
+
+#include <fsp/api.h>
+
+struct vr_config {
+
+	/* The below settings will take effect when this is set to 1 for that domain. */
+	bool vr_config_enable;
+
+	/* AC and DC Loadline.
+	   They are in 1/100 mOhms (ie. 1250 = 12.50 mOhms) and range is 0-6249. */
+	uint16_t ac_loadline;
+	uint16_t dc_loadline;
+
+	/* VR Icc Max limit.
+	   Range is from 0-255A in 1/4 A units (400 = 100A). */
+	uint16_t icc_max;
+
+	/* Thermal Design Current time window.
+	   Defined in milli seconds and range 1ms to 448s. */
+	uint32_t tdc_timewindow;
+
+	/* Thermal Design Current current limit.
+	   Defined in 1/8A units and range is 0-4095. 1000 = 125A. */
+	uint16_t tdc_currentlimit;
+};
+
+#define VR_CFG_AMP(i) (uint16_t)((i) * 4)
+#define VR_CFG_MOHMS(i) (uint16_t)((i) * 100)
+#define VR_CFG_TDC_AMP(i) (uint16_t)((i) * 8)
+
+/* VrConfig Settings for 4 domains
+ * 0 = IA core, 1 = GT
+ */
+enum vr_domain {
+	VR_DOMAIN_IA,
+	VR_DOMAIN_GT,
+	NUM_VR_DOMAINS
+};
+
+#define VR_CFG_ALL_DOMAINS_LOADLINE(ia, gt)		\
+	{						\
+		[VR_DOMAIN_IA] = VR_CFG_MOHMS(ia),	\
+		[VR_DOMAIN_GT] = VR_CFG_MOHMS(gt),	\
+	}
+
+#define VR_CFG_ALL_DOMAINS_ICC(ia, gt)			\
+	{						\
+		[VR_DOMAIN_IA] = VR_CFG_AMP(ia),	\
+		[VR_DOMAIN_GT] = VR_CFG_AMP(gt),	\
+	}
+
+#define VR_CFG_ALL_DOMAINS_TDC(ia, gt)	\
+	{				\
+		[VR_DOMAIN_IA] = ia,	\
+		[VR_DOMAIN_GT] = gt,	\
+	}
+
+#define VR_CFG_ALL_DOMAINS_TDC_CURRENT(ia, gt)		\
+	{						\
+		[VR_DOMAIN_IA] = VR_CFG_TDC_AMP(ia),	\
+		[VR_DOMAIN_GT] = VR_CFG_TDC_AMP(gt),	\
+	}
+
+void fill_vr_domain_config(FSP_S_CONFIG *s_cfg, int domain, const struct vr_config *cfg);
+#endif
diff --git a/src/soc/intel/alderlake/vr_config.c b/src/soc/intel/alderlake/vr_config.c
new file mode 100644
index 000000000000..88a0c31225e5
--- /dev/null
+++ b/src/soc/intel/alderlake/vr_config.c
@@ -0,0 +1,116 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+#include <device/pci_ids.h>
+#include <device/pci_ops.h>
+#include <fsp/api.h>
+#include <soc/ramstage.h>
+#include <soc/vr_config.h>
+#include <console/console.h>
+#include <intelblocks/cpulib.h>
+
+/*
+ * VR Configurations for IA and GT domains for ADL-P SKU's.
+ *
+ * +----------------+-----------+-------+-------+---------+-------------+----------+
+ * |      SKU       | Setting   | AC LL | DC LL | ICC MAX | TDC Current | TDC Time |
+ * |                |           |(mOhms)|(mOhms)|   (A)   |     (A)     |   (msec) |
+ * +----------------+-----------+-------+-------+---------+-------------+----------+
+ * | ADL-P 682(45W) |    IA     |  2.3  |  2.3  |   160   |      57     |  28000   |
+ * +                +-----------+-------+-------+---------+-------------+----------+
+ * |                |    GT     |  3.2  |  3.2  |    50   |      57     |  28000   |
+ * +----------------+-----------+-------+-------+---------+-------------+----------+
+ * | ADL-P 482(28W) |    IA     |  2.3  |  2.3  |   109   |      40     |  28000   |
+ * +                +-----------+-------+-------+---------+-------------+----------+
+ * |                |    GT     |  3.2  |  3.2  |    50   |      40     |  28000   |
+ * +----------------+-----------+-------+-------+---------+-------------+----------+
+ * | ADL-P 282(15W) |    IA     |  2.8  |  2.8  |    80   |      20     |  28000   |
+ * +                +-----------+-------+-------+---------+-------------+----------+
+ * |                |    GT     |  3.2  |  3.2  |    40   |      20     |  28000   |
+ * +----------------+-----------+-------+-------+---------+-------------+----------+
+ */
+
+struct vr_lookup {
+	uint16_t mchid;
+	uint32_t conf[NUM_VR_DOMAINS];
+};
+
+static uint32_t load_table(const struct vr_lookup *tbl, const int tbl_entries, const int domain,
+					const uint16_t mch_id)
+{
+	for (size_t i = 0; i < tbl_entries; i++) {
+		if (tbl[i].mchid != mch_id)
+			continue;
+		return tbl[i].conf[domain];
+	}
+
+	printk(BIOS_ERR, "ERROR: Unknown MCH (0x%x) in %s\n", mch_id, __func__);
+	return 0;
+}
+
+static const struct vr_lookup vr_config_ll[] = {
+	{ PCI_DEVICE_ID_INTEL_ADL_P_ID_3, VR_CFG_ALL_DOMAINS_LOADLINE(2.3, 3.2) },
+	{ PCI_DEVICE_ID_INTEL_ADL_P_ID_5, VR_CFG_ALL_DOMAINS_LOADLINE(2.3, 3.2) },
+	{ PCI_DEVICE_ID_INTEL_ADL_P_ID_7, VR_CFG_ALL_DOMAINS_LOADLINE(2.8, 3.2) },
+};
+
+static const struct vr_lookup vr_config_icc[] = {
+	{ PCI_DEVICE_ID_INTEL_ADL_P_ID_3, VR_CFG_ALL_DOMAINS_ICC(160, 50) },
+	{ PCI_DEVICE_ID_INTEL_ADL_P_ID_5, VR_CFG_ALL_DOMAINS_ICC(109, 50) },
+	{ PCI_DEVICE_ID_INTEL_ADL_P_ID_7, VR_CFG_ALL_DOMAINS_ICC(80, 40) },
+};
+
+static const struct vr_lookup vr_config_tdc_timewindow[] = {
+	{ PCI_DEVICE_ID_INTEL_ADL_P_ID_3, VR_CFG_ALL_DOMAINS_TDC(28000, 28000) },
+	{ PCI_DEVICE_ID_INTEL_ADL_P_ID_5, VR_CFG_ALL_DOMAINS_TDC(28000, 28000) },
+	{ PCI_DEVICE_ID_INTEL_ADL_P_ID_7, VR_CFG_ALL_DOMAINS_TDC(28000, 28000) },
+};
+
+static const struct vr_lookup vr_config_tdc_currentlimit[] = {
+	{ PCI_DEVICE_ID_INTEL_ADL_P_ID_3, VR_CFG_ALL_DOMAINS_TDC_CURRENT(57, 57) },
+	{ PCI_DEVICE_ID_INTEL_ADL_P_ID_5, VR_CFG_ALL_DOMAINS_TDC_CURRENT(40, 40) },
+	{ PCI_DEVICE_ID_INTEL_ADL_P_ID_7, VR_CFG_ALL_DOMAINS_TDC_CURRENT(20, 20) },
+};
+
+void fill_vr_domain_config(FSP_S_CONFIG *s_cfg,
+		int domain, const struct vr_config *chip_cfg)
+{
+	const struct vr_config *cfg;
+
+	if (domain < 0 || domain >= NUM_VR_DOMAINS)
+		return;
+
+	/* Use device tree override if requested */
+	if (chip_cfg->vr_config_enable) {
+		cfg = chip_cfg;
+
+		s_cfg->AcLoadline[domain] = cfg->ac_loadline;
+		s_cfg->DcLoadline[domain] = cfg->dc_loadline;
+		s_cfg->IccMax[domain] = cfg->icc_max;
+		s_cfg->TdcTimeWindow[domain] = cfg->tdc_timewindow;
+		s_cfg->TdcCurrentLimit[domain] = cfg->tdc_currentlimit;
+		if (cfg->tdc_timewindow != 0 && cfg->tdc_currentlimit != 0)
+			s_cfg->TdcEnable[domain] = 1;
+	} else {
+		uint16_t mch_id = 0;
+
+		if (!mch_id) {
+			struct device *dev = pcidev_path_on_root(SA_DEVFN_ROOT);
+			mch_id = dev ? pci_read_config16(dev, PCI_DEVICE_ID) : 0xffff;
+		}
+
+		s_cfg->AcLoadline[domain] = load_table(vr_config_ll, ARRAY_SIZE(vr_config_ll),
+							domain, mch_id);
+		s_cfg->DcLoadline[domain] = load_table(vr_config_ll, ARRAY_SIZE(vr_config_ll),
+							domain, mch_id);
+		s_cfg->IccMax[domain] = load_table(vr_config_icc, ARRAY_SIZE(vr_config_icc),
+							domain, mch_id);
+		s_cfg->TdcTimeWindow[domain] = load_table(vr_config_tdc_timewindow,
+							ARRAY_SIZE(vr_config_tdc_timewindow),
+							domain, mch_id);
+		s_cfg->TdcCurrentLimit[domain] = load_table(vr_config_tdc_currentlimit,
+							ARRAY_SIZE(vr_config_tdc_currentlimit),
+							domain, mch_id);
+		if (s_cfg->TdcTimeWindow[domain] != 0 && s_cfg->TdcCurrentLimit[domain] != 0)
+			s_cfg->TdcEnable[domain] = 1;
+	}
+}