From c76e53ce30a13f77c0f3282a649ca4bfd84dede8 Mon Sep 17 00:00:00 2001 From: Seunghwan Kim Date: Mon, 3 Sep 2018 20:25:50 +0900 Subject: mb/google/poppy/variants/nautilus: Bump VCC_SA voltage offset 75mV Nautilus-Wifi with m3 AP got a halt issue during CTS test. Nautilus-Wifi was FCS with Celeron AP first and also its PCB/BOM was validated only with Celeron. Since Celeron deos not support turbo boost mode, its steady power demend and lower CPU frequency may not reflect the potential noise hidden inside the board. Bumping VCC_SA voltage offset 75mV confirmed works to mitigate the potential noise coupling to VCC_GT/SA, and we verified this change makes this issue go away on Nautilus-Wifi board. Nautilus-LTE doesn't show this issue, since it has 10L PCB, will have better grounding and less noise/ripple than 8L PCB. BUG=b:111417632 BRANCH=poppy TEST=Verified CTS test pass without an issue. Change-Id: Id13fcc36a5b6ed42620c66f57a7303f30bff1a50 Signed-off-by: Seunghwan Kim Reviewed-on: https://review.coreboot.org/28439 Tested-by: build bot (Jenkins) Reviewed-by: Furquan Shaikh --- .../baseboard/include/baseboard/variants.h | 6 +++ .../google/poppy/variants/nautilus/Makefile.inc | 2 + .../google/poppy/variants/nautilus/mainboard.c | 37 ++++++++----------- .../google/poppy/variants/nautilus/memory.c | 10 +++++ src/mainboard/google/poppy/variants/nautilus/sku.c | 43 ++++++++++++++++++++++ 5 files changed, 77 insertions(+), 21 deletions(-) create mode 100644 src/mainboard/google/poppy/variants/nautilus/sku.c (limited to 'src/mainboard/google/poppy/variants') diff --git a/src/mainboard/google/poppy/variants/baseboard/include/baseboard/variants.h b/src/mainboard/google/poppy/variants/baseboard/include/baseboard/variants.h index 391f809c16..3c589713f3 100644 --- a/src/mainboard/google/poppy/variants/baseboard/include/baseboard/variants.h +++ b/src/mainboard/google/poppy/variants/baseboard/include/baseboard/variants.h @@ -54,6 +54,12 @@ struct memory_params { const void *rcomp_target; size_t rcomp_target_size; bool use_sec_spd; + + /* Enable SA overclocking mailbox commands */ + bool enable_sa_oc_support; + + /* The voltage offset applied to the SA in mV. 1000(mV) = Maximum */ + uint16_t sa_voltage_offset_val; }; void variant_memory_params(struct memory_params *p); diff --git a/src/mainboard/google/poppy/variants/nautilus/Makefile.inc b/src/mainboard/google/poppy/variants/nautilus/Makefile.inc index d52893e50f..130c940aa2 100644 --- a/src/mainboard/google/poppy/variants/nautilus/Makefile.inc +++ b/src/mainboard/google/poppy/variants/nautilus/Makefile.inc @@ -7,9 +7,11 @@ bootblock-y += gpio.c romstage-y += memory.c romstage-y += gpio.c +romstage-y += sku.c ramstage-y += gpio.c ramstage-y += nhlt.c ramstage-y += mainboard.c +ramstage-y += sku.c smm-$(CONFIG_HAVE_SMI_HANDLER) += smihandler.c diff --git a/src/mainboard/google/poppy/variants/nautilus/mainboard.c b/src/mainboard/google/poppy/variants/nautilus/mainboard.c index e51370cfa3..b9f6314d1b 100644 --- a/src/mainboard/google/poppy/variants/nautilus/mainboard.c +++ b/src/mainboard/google/poppy/variants/nautilus/mainboard.c @@ -15,32 +15,16 @@ #include #include -#include #include +#include #include #include #include -uint32_t variant_board_sku(void) -{ - static uint32_t sku_id = SKU_UNKNOWN; - - if (sku_id != SKU_UNKNOWN) - return sku_id; - - /* - * Nautilus uses GPP_B20 to determine SKU - * 0 - Wifi SKU - * 1 - LTE SKU - */ - gpio_input_pulldown(GPP_B20); - if (!gpio_get(GPP_B20)) - sku_id = SKU_0_NAUTILUS; - else - sku_id = SKU_1_NAUTILUS_LTE; - - return sku_id; -} +#define R_PCH_OC_WDT_CTL 0x54 +#define B_PCH_OC_WDT_CTL_FORCE_ALL BIT15 +#define B_PCH_OC_WDT_CTL_EN BIT14 +#define B_PCH_OC_WDT_CTL_UNXP_RESET_STS BIT22 const char *smbios_mainboard_sku(void) { @@ -57,11 +41,22 @@ void variant_devtree_update(void) uint32_t sku_id = variant_board_sku(); struct device *root = SA_DEV_ROOT; config_t *cfg = root->chip_info; + uint16_t abase; + uint32_t val32; switch (sku_id) { case SKU_0_NAUTILUS: /* Disable LTE module */ cfg->usb3_ports[3].enable = 0; + + /* OC_WDT has been enabled in FSP-M by enabling SaOcSupport. + * We should clear it to prevent turning the system off. */ + abase = pci_read_config16(PCH_DEV_PMC, ABASE) & 0xfffc; + val32 = inl(abase + R_PCH_OC_WDT_CTL); + val32 &= ~(B_PCH_OC_WDT_CTL_EN | + B_PCH_OC_WDT_CTL_FORCE_ALL | + B_PCH_OC_WDT_CTL_UNXP_RESET_STS); + outl(val32, abase + R_PCH_OC_WDT_CTL); break; case SKU_1_NAUTILUS_LTE: diff --git a/src/mainboard/google/poppy/variants/nautilus/memory.c b/src/mainboard/google/poppy/variants/nautilus/memory.c index dc845bcb7f..a0dd76bcb6 100644 --- a/src/mainboard/google/poppy/variants/nautilus/memory.c +++ b/src/mainboard/google/poppy/variants/nautilus/memory.c @@ -14,6 +14,7 @@ */ #include +#include /* DQ byte map */ static const u8 dq_map[][12] = { @@ -46,4 +47,13 @@ void variant_memory_params(struct memory_params *p) p->rcomp_resistor_size = sizeof(rcomp_resistor); p->rcomp_target = rcomp_target; p->rcomp_target_size = sizeof(rcomp_target); + + switch (variant_board_sku()) { + case SKU_0_NAUTILUS: + /* Bumping VCC_SA voltage offset 75mV to allow a + * tolerance to PLLGT on Nautilus-Wifi sku */ + p->enable_sa_oc_support = 1; + p->sa_voltage_offset_val = 75; + break; + } } diff --git a/src/mainboard/google/poppy/variants/nautilus/sku.c b/src/mainboard/google/poppy/variants/nautilus/sku.c new file mode 100644 index 0000000000..55b118d847 --- /dev/null +++ b/src/mainboard/google/poppy/variants/nautilus/sku.c @@ -0,0 +1,43 @@ +/* + * This file is part of the coreboot project. + * + * Copyright 2018 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 +#include +#include + +uint32_t variant_board_sku(void) +{ +#if ENV_ROMSTAGE + uint32_t sku_id = SKU_UNKNOWN; +#else + static uint32_t sku_id = SKU_UNKNOWN; + + if (sku_id != SKU_UNKNOWN) + return sku_id; +#endif + + /* + * Nautilus uses GPP_B20 to determine SKU + * 0 - Wifi SKU + * 1 - LTE SKU + */ + gpio_input_pulldown(GPP_B20); + if (!gpio_get(GPP_B20)) + sku_id = SKU_0_NAUTILUS; + else + sku_id = SKU_1_NAUTILUS_LTE; + + return sku_id; +} -- cgit v1.2.3