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soc/intel/apollolake: Make SCI configurable

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The System Control Interrupt is routed per default to IRQ 9. Some
mainboards use IRQ 9 for different purpose. Therefore it is necessary to
make the SCI configurable on Apollo Lake.

Change-Id: Ib4a7ce7d68a6f1f16f27d0902d83dc8774e785b1
Signed-off-by: Mario Scheithauer <mario.scheithauer@siemens.com>
Reviewed-on: https://review.coreboot.org/21584
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
This commit is contained in:
Mario Scheithauer
2017-09-18 17:08:48 +02:00
committed by Aaron Durbin
parent 09703f6494
commit 841416f6f8
4 changed files with 46 additions and 0 deletions
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31
src/soc/intel/apollolake/chip.c
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@@ -2,6 +2,7 @@
* This file is part of the coreboot project.
*
* Copyright (C) 2015 - 2017 Intel Corp.
* Copyright 2017 Siemens AG.
* (Written by Alexandru Gagniuc <alexandrux.gagniuc@intel.com> for Intel Corp.)
* (Written by Andrey Petrov <andrey.petrov@intel.com> for Intel Corp.)
*
@@ -25,6 +26,7 @@
#include <cpu/x86/msr.h>
#include <device/device.h>
#include <device/pci.h>
#include <intelblocks/acpi.h>
#include <intelblocks/fast_spi.h>
#include <intelblocks/msr.h>
#include <fsp/api.h>
@@ -287,6 +289,29 @@ static void set_power_limits(void)
MCHBAR32(MCHBAR_RAPL_PPL + 4) = limit.hi & ~PKG_POWER_LIMIT_EN;
}
/* Overwrites the SCI IRQ if another IRQ number is given by device tree. */
static void set_sci_irq(void)
{
static struct soc_intel_apollolake_config *cfg;
struct device *dev = SA_DEV_ROOT;
uint32_t scis;
if (!dev || !dev->chip_info) {
printk(BIOS_ERR, "BUG! Could not find SOC devicetree config\n");
return;
}
cfg = dev->chip_info;
/* Change only if a device tree entry exists. */
if (cfg->sci_irq) {
scis = soc_read_sci_irq_select();
scis &= ~SCI_IRQ_SEL;
scis |= (cfg->sci_irq << SCI_IRQ_ADJUST) & SCI_IRQ_SEL;
soc_write_sci_irq_select(scis);
}
}
static void soc_init(void *data)
{
struct global_nvs_t *gnvs;
@@ -319,6 +344,12 @@ static void soc_init(void *data)
/* Set RAPL MSR for Package power limits*/
set_power_limits();
/*
* FSP-S routes SCI to IRQ 9. With the help of this function you can
* select another IRQ for SCI.
*/
set_sci_irq();
}
static void soc_final(void *data)