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/*
* This file is part of the coreboot project.
*
* Copyright 2015 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.
*
*/
#include <device/pci_ids.h>
#include <device/pci_ops.h>
#include <fsp/api.h>
#include <soc/ramstage.h>
#include <soc/vr_config.h>
#define KBLY_ICCMAX_SA VR_CFG_AMP(4.1)
#define KBLY_ICCMAX_CORE VR_CFG_AMP(24)
#define AMLY_ICCMAX_CORE VR_CFG_AMP(28)
#define KBLY_ICCMAX_GTS_GTUS VR_CFG_AMP(24)
#define KBLR_ICCMAX_SA_U42 VR_CFG_AMP(6)
#define KBLU_ICCMAX_SA_U22 VR_CFG_AMP(4.5)
#define KBLR_ICCMAX_CORE_U42 VR_CFG_AMP(64)
#define KBLU_ICCMAX_CORE_U22_PREMIUM VR_CFG_AMP(32)
#define KBLU_ICCMAX_CORE_U22_BASE VR_CFG_AMP(29)
#define KBLUR_ICCMAX_GTS_GTUS VR_CFG_AMP(31)
enum kbl_sku {
KBL_Y_SKU,
KBL_R_SKU,
KBL_U_BASE_SKU,
KBL_U_PREMIUM_SKU,
AML_Y_SKU,
};
/*
* Iccmax table from Doc #559100 Section 7.2 DC Specifications, the
* Iccmax is the same among KBL-Y but KBL-U/R.
* Addendum for AML-Y #594883, IccMax for IA core is 28A.
* +----------------+-------------+---------------+------+-----+
* | Domain/Setting | SA | IA | GTUS | GTS |
* +----------------+-------------+---------------+------+-----+
* | IccMax(KBL-U/R)| 6A(U42) | 64A(U42) | 31A | 31A |
* | | 4.5A(Others)| 29A(P/C) | | |
* | | | 32A(i3/i5) | | |
* +----------------+-------------+---------------+------+-----+
* | IccMax(KBL-Y) | 4.1A | 24A | 24A | 24A |
* +----------------+-------------+---------------+------+-----+
* | IccMax(AML-Y) | 4.1A | 28A | 24A | 24A |
* +----------------+-------------+---------------+------+-----+
*/
static const struct {
uint16_t icc_max[NUM_VR_DOMAINS];
}sku_icc_max_mapping[] = {
[KBL_Y_SKU] = {
.icc_max = {
KBLY_ICCMAX_SA,
KBLY_ICCMAX_CORE,
KBLY_ICCMAX_GTS_GTUS,
KBLY_ICCMAX_GTS_GTUS
}
},
[KBL_R_SKU] = {
.icc_max = {
KBLR_ICCMAX_SA_U42,
KBLR_ICCMAX_CORE_U42,
KBLUR_ICCMAX_GTS_GTUS,
KBLUR_ICCMAX_GTS_GTUS
}
},
[KBL_U_BASE_SKU] = {
.icc_max = {
KBLU_ICCMAX_SA_U22,
KBLU_ICCMAX_CORE_U22_BASE,
KBLUR_ICCMAX_GTS_GTUS,
KBLUR_ICCMAX_GTS_GTUS
}
},
[KBL_U_PREMIUM_SKU] = {
.icc_max = {
KBLU_ICCMAX_SA_U22,
KBLU_ICCMAX_CORE_U22_PREMIUM,
KBLUR_ICCMAX_GTS_GTUS,
KBLUR_ICCMAX_GTS_GTUS
}
},
[AML_Y_SKU] = {
.icc_max = {
KBLY_ICCMAX_SA,
AMLY_ICCMAX_CORE,
KBLY_ICCMAX_GTS_GTUS,
KBLY_ICCMAX_GTS_GTUS
}
},
};
/* Default values for domain configuration. PSI3 and PSI4 are disabled. */
static const struct vr_config default_configs[NUM_VR_DOMAINS] = {
[VR_SYSTEM_AGENT] = {
.vr_config_enable = 1,
.psi1threshold = VR_CFG_AMP(20),
.psi2threshold = VR_CFG_AMP(4),
.psi3threshold = VR_CFG_AMP(1),
.psi3enable = 0,
.psi4enable = 0,
.imon_slope = 0x0,
.imon_offset = 0x0,
.icc_max = VR_CFG_AMP(7),
.voltage_limit = 1520,
},
[VR_IA_CORE] = {
.vr_config_enable = 1,
.psi1threshold = VR_CFG_AMP(20),
.psi2threshold = VR_CFG_AMP(5),
.psi3threshold = VR_CFG_AMP(1),
.psi3enable = 0,
.psi4enable = 0,
.imon_slope = 0x0,
.imon_offset = 0x0,
.icc_max = VR_CFG_AMP(34),
.voltage_limit = 1520,
},
#if IS_ENABLED(CONFIG_PLATFORM_USES_FSP1_1)
[VR_RING] = {
.vr_config_enable = 1,
.psi1threshold = VR_CFG_AMP(20),
.psi2threshold = VR_CFG_AMP(5),
.psi3threshold = VR_CFG_AMP(1),
.psi3enable = 0,
.psi4enable = 0,
.imon_slope = 0x0,
.imon_offset = 0x0,
.icc_max = VR_CFG_AMP(34),
.voltage_limit = 1520,
},
#endif
[VR_GT_UNSLICED] = {
.vr_config_enable = 1,
.psi1threshold = VR_CFG_AMP(20),
.psi2threshold = VR_CFG_AMP(5),
.psi3threshold = VR_CFG_AMP(1),
.psi3enable = 0,
.psi4enable = 0,
.imon_slope = 0x0,
.imon_offset = 0x0,
.icc_max = VR_CFG_AMP(35),
.voltage_limit = 1520,
},
[VR_GT_SLICED] = {
.vr_config_enable = 1,
.psi1threshold = VR_CFG_AMP(20),
.psi2threshold = VR_CFG_AMP(5),
.psi3threshold = VR_CFG_AMP(1),
.psi3enable = 0,
.psi4enable = 0,
.imon_slope = 0x0,
.imon_offset = 0x0,
.icc_max = VR_CFG_AMP(35),
.voltage_limit = 1520,
},
};
static uint16_t get_dev_id(struct device *dev)
{
return pci_read_config16(dev, PCI_DEVICE_ID);
}
static int get_kbl_sku(void)
{
static int sku = -1;
uint16_t id;
if (sku != -1)
return sku;
id = get_dev_id(SA_DEV_ROOT);
if (id == PCI_DEVICE_ID_INTEL_KBL_U_R)
sku = KBL_R_SKU;
else if (id == PCI_DEVICE_ID_INTEL_KBL_ID_Y) {
id = get_dev_id(SA_DEV_IGD);
if (id == PCI_DEVICE_ID_INTEL_AML_GT2_ULX)
sku = AML_Y_SKU;
else
sku = KBL_Y_SKU;
} else if (id == PCI_DEVICE_ID_INTEL_KBL_ID_U) {
id = get_dev_id(PCH_DEV_LPC);
if (id == PCI_DEVICE_ID_INTEL_SPT_LP_U_BASE_HDCP22)
sku = KBL_U_BASE_SKU;
else
sku = KBL_U_PREMIUM_SKU;
} else
/* Not one of the skus with available Icc max mapping. */
sku = -2;
return sku;
}
static uint16_t get_sku_icc_max(int domain, uint16_t board_icc_max)
{
/* If board provided non-zero value, use it. */
if (board_icc_max)
return board_icc_max;
/* Check if this SKU has a mapping table entry. */
int sku_id = get_kbl_sku();
if (sku_id < 0)
return 0;
return sku_icc_max_mapping[sku_id].icc_max[domain];
}
void fill_vr_domain_config(void *params,
int domain, const struct vr_config *chip_cfg)
{
FSP_SIL_UPD *vr_params = (FSP_SIL_UPD *)params;
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;
else
cfg = &default_configs[domain];
vr_params->VrConfigEnable[domain] = cfg->vr_config_enable;
vr_params->Psi1Threshold[domain] = cfg->psi1threshold;
vr_params->Psi2Threshold[domain] = cfg->psi2threshold;
vr_params->Psi3Threshold[domain] = cfg->psi3threshold;
vr_params->Psi3Enable[domain] = cfg->psi3enable;
vr_params->Psi4Enable[domain] = cfg->psi4enable;
vr_params->ImonSlope[domain] = cfg->imon_slope;
vr_params->ImonOffset[domain] = cfg->imon_offset;
vr_params->IccMax[domain] = get_sku_icc_max(domain, cfg->icc_max);
vr_params->VrVoltageLimit[domain] = cfg->voltage_limit;
#if IS_ENABLED(CONFIG_PLATFORM_USES_FSP2_0)
vr_params->AcLoadline[domain] = cfg->ac_loadline;
vr_params->DcLoadline[domain] = cfg->dc_loadline;
#endif
}
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