diff options
| -rw-r--r-- | src/ec/google/chromeec/Makefile.inc | 2 | ||||
| -rw-r--r-- | src/ec/google/chromeec/smihandler.c | 90 | ||||
| -rw-r--r-- | src/ec/google/chromeec/smm.h | 37 |
3 files changed, 128 insertions, 1 deletions
diff --git a/src/ec/google/chromeec/Makefile.inc b/src/ec/google/chromeec/Makefile.inc index 4a03948e65..58f8b6b139 100644 --- a/src/ec/google/chromeec/Makefile.inc +++ b/src/ec/google/chromeec/Makefile.inc @@ -6,7 +6,7 @@ ramstage-$(CONFIG_EC_GOOGLE_CHROMEEC_I2C) += ec_i2c.c ramstage-$(CONFIG_EC_GOOGLE_CHROMEEC_LPC) += ec_lpc.c ramstage-$(CONFIG_EC_GOOGLE_CHROMEEC_MEC) += ec_mec.c ramstage-$(CONFIG_EC_GOOGLE_CHROMEEC_SPI) += ec_spi.c -smm-y += ec.c crosec_proto.c vstore.c +smm-y += ec.c crosec_proto.c smihandler.c vstore.c smm-$(CONFIG_EC_GOOGLE_CHROMEEC_I2C) += ec_i2c.c smm-$(CONFIG_EC_GOOGLE_CHROMEEC_LPC) += ec_lpc.c smm-$(CONFIG_EC_GOOGLE_CHROMEEC_MEC) += ec_mec.c diff --git a/src/ec/google/chromeec/smihandler.c b/src/ec/google/chromeec/smihandler.c new file mode 100644 index 0000000000..75636ea8c1 --- /dev/null +++ b/src/ec/google/chromeec/smihandler.c @@ -0,0 +1,90 @@ +/* + * 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 (IS_ENABLED(CONFIG_ELOG_GSMI) && event) + elog_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) +{ + while (google_chromeec_get_event() != 0) + ; +} + +void chromeec_smi_sleep(int slp_type, uint32_t s3_mask, uint32_t s5_mask) +{ + 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_apmc(int apmc, uint32_t sci_mask, uint32_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; + } +} diff --git a/src/ec/google/chromeec/smm.h b/src/ec/google/chromeec/smm.h new file mode 100644 index 0000000000..03d6e0044f --- /dev/null +++ b/src/ec/google/chromeec/smm.h @@ -0,0 +1,37 @@ +/* + * 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. + */ + +#ifndef _EC_GOOGLE_CHROMEEC_SMM_H +#define _EC_GOOGLE_CHROMEEC_SMM_H + +#include <stdint.h> + +/* Process all events from the EC when EC triggered an SMI#. */ +void chromeec_smi_process_events(void); + +/* + * Set wake masks according to sleep type, clear SCI and SMI masks, + * and clear any pending events. + */ +void chromeec_smi_sleep(int slp_type, uint32_t s3_mask, uint32_t s5_mask); + +/* + * Provided the APMC command do the following while clearing pending events. + * APM_CNT_ACPI_ENABLE: clear SMI mask. set SCI mask. + * APM_CNT_ACPI_DISABLE: clear SCI mask. set SMI mask. + */ +void chromeec_smi_apmc(int apmc, uint32_t sci_mask, uint32_t smi_mask); + +#endif /* _EC_GOOGLE_CHROMEEC_SMM_H */ |