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ec/google/wilco: Add SMM handlers 

Add EC handlers for specific SMM actions:

- on entry to sleep state tell the EC to save state and to prepare for
the host to enter sleep
- on ACPI enable/disable send command to the EC
- add a function to print SMI reasons when eSPI SMI is received

These need to be called by the mainboard handlers which will be done
when a board is added that uses this EC.

Change-Id: Ibabdc1462e0a8df405f9520244b83684e2ccf2f5
Signed-off-by: Duncan Laurie <dlaurie@google.com>
Reviewed-on: https://review.coreboot.org/29119
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
This commit is contained in:
Duncan Laurie 2018-10-15 15:18:01 +00:00 committed by Duncan Laurie
parent 421a962cc6
commit d978174d1d
3 changed files with 107 additions and 0 deletions
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1
src/ec/google/wilco/Makefile.inc
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@ -1,5 +1,6 @@
ifeq ($(CONFIG_EC_GOOGLE_WILCO),y)
ramstage-y += chip.c commands.c mailbox.c
smm-y += commands.c mailbox.c smihandler.c
endif

59
src/ec/google/wilco/smihandler.c Normal file
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@ -0,0 +1,59 @@
/*
* This file is part of the coreboot project.
*
* Copyright 2018 Google LLC
*
* 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 <arch/acpi.h>
#include <console/console.h>
#include <cpu/x86/smm.h>
#include "commands.h"
#include "ec.h"
#include "smm.h"
void wilco_ec_smi_sleep(int slp_type)
{
switch (slp_type) {
case ACPI_S3:
wilco_ec_slp_en();
break;
case ACPI_S5:
wilco_ec_power_off(EC_SWOFF_ACPI);
break;
}
}
void wilco_ec_smi_apmc(int apmc)
{
switch (apmc) {
case APM_CNT_ACPI_ENABLE:
wilco_ec_send(KB_ACPI, ACPI_ON);
break;
case APM_CNT_ACPI_DISABLE:
wilco_ec_send(KB_ACPI, ACPI_OFF);
break;
}
}
void wilco_ec_smi_espi(void)
{
struct ec_pm_event_state pm;
if (!wilco_ec_get_pm(&pm, true)) {
printk(BIOS_INFO,
"EC SMI: %02x_%02x-%02x_%02x_%02x_%02x_%02x_%02x-%02x",
pm.event[0], pm.event[1],
pm.state[0], pm.state[1], pm.state[2],
pm.state[3], pm.state[4], pm.state[5], pm.hotkey);
}
}

47
src/ec/google/wilco/smm.h Normal file
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@ -0,0 +1,47 @@
/*
* This file is part of the coreboot project.
*
* Copyright 2018 Google LLC
*
* 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.
*/
#ifndef EC_GOOGLE_WILCO_SMM_H
#define EC_GOOGLE_WILCO_SMM_H
/* Handlers for SMI events */
/**
* wilco_ec_smi_sleep
*
* Perform EC actions before suspend or power-off.
*
* @slp_type: Requested sleep type
*/
void wilco_ec_smi_sleep(int slp_type);
/**
* wilco_ec_smi_apmc
*
* Perform EC actions on ACPI OS commands.
* This is used when the OS enables or disables ACPI.
*
* @apmc: OS command
*/
void wilco_ec_smi_apmc(int apmc);
/**
* wilco_ec_smi_espi
*
* Perform EC actions on EC eSPI SMI interrupt.
*/
void wilco_ec_smi_espi(void);
#endif /* EC_GOOGLE_WILCO_SMM_H */