| /* |
| * This file is part of the coreboot project. |
| * |
| * Copyright 2016 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 <arch/acpi.h> |
| #include <console/console.h> |
| #include <cpu/x86/smm.h> |
| #include <ec/google/chromeec/ec.h> |
| #include <elog.h> |
| #include <halt.h> |
| #include "smm.h" |
| |
| static int chromeec_process_one_event(void) |
| { |
| uint8_t event = google_chromeec_get_event(); |
| |
| /* Log this event */ |
| if (event) |
| elog_gsmi_add_event_byte(ELOG_TYPE_EC_EVENT, event); |
| |
| switch (event) { |
| case EC_HOST_EVENT_LID_CLOSED: |
| printk(BIOS_DEBUG, "LID CLOSED, SHUTDOWN\n"); |
| |
| poweroff(); |
| break; |
| } |
| return !!event; |
| } |
| |
| void chromeec_smi_process_events(void) |
| { |
| /* Process all pending events */ |
| while (chromeec_process_one_event()) |
| ; |
| } |
| |
| static void clear_pending_events(void) |
| { |
| struct ec_response_get_next_event mkbp_event; |
| |
| while (google_chromeec_get_event() != 0) |
| ; |
| |
| printk(BIOS_DEBUG,"Clearing pending EC events. Error code 1 is expected.\n"); |
| while (google_chromeec_get_mkbp_event(&mkbp_event) == 0) |
| ; |
| } |
| |
| void chromeec_smi_sleep(int slp_type, uint64_t s3_mask, uint64_t s5_mask) |
| { |
| if (!google_chromeec_is_uhepi_supported()) { |
| switch (slp_type) { |
| case ACPI_S3: |
| /* Enable wake events */ |
| google_chromeec_set_wake_mask(s3_mask); |
| break; |
| case ACPI_S5: |
| /* Enable wake events */ |
| google_chromeec_set_wake_mask(s5_mask); |
| break; |
| } |
| } |
| |
| /* Disable SCI and SMI events */ |
| google_chromeec_set_smi_mask(0); |
| google_chromeec_set_sci_mask(0); |
| |
| /* Clear pending events that may trigger immediate wake */ |
| clear_pending_events(); |
| } |
| |
| void chromeec_smi_device_event_sleep(int slp_type, uint64_t s3_mask, |
| uint64_t s5_mask) |
| { |
| switch (slp_type) { |
| case ACPI_S3: |
| /* Enable device wake events */ |
| google_chromeec_set_device_enabled_events(s3_mask); |
| break; |
| case ACPI_S5: |
| /* Enable device wake events */ |
| google_chromeec_set_device_enabled_events(s5_mask); |
| break; |
| } |
| |
| /* Read and clear pending events that may trigger immediate wake */ |
| google_chromeec_get_device_current_events(); |
| } |
| |
| void chromeec_smi_apmc(int apmc, uint64_t sci_mask, uint64_t smi_mask) |
| { |
| switch (apmc) { |
| case APM_CNT_ACPI_ENABLE: |
| google_chromeec_set_smi_mask(0); |
| clear_pending_events(); |
| google_chromeec_set_sci_mask(sci_mask); |
| break; |
| case APM_CNT_ACPI_DISABLE: |
| google_chromeec_set_sci_mask(0); |
| clear_pending_events(); |
| google_chromeec_set_smi_mask(smi_mask); |
| break; |
| } |
| } |