switches.c

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/* SPDX-License-Identifier: GPL-2.0-only */
 
#include <bootmode.h>
#include <ec/google/chromeec/ec.h>
#include <elog.h>
 
#if CONFIG(EC_GOOGLE_CHROMEEC_LPC)
int get_lid_switch(void)
{
        if (!CONFIG(VBOOT_LID_SWITCH))
                return -1;
 
        return !!(google_chromeec_get_switches() & EC_SWITCH_LID_OPEN);
}
#endif
 
int get_recovery_mode_switch(void)
{
        /* Check for dedicated recovery switch first. */
        if (CONFIG(EC_GOOGLE_CHROMEEC_LPC) &&
            (google_chromeec_get_switches() & EC_SWITCH_DEDICATED_RECOVERY))
                return 1;
 
        /* Check if the EC has posted the keyboard recovery event. */
        return !!(google_chromeec_get_events_b() &
                  EC_HOST_EVENT_MASK(EC_HOST_EVENT_KEYBOARD_RECOVERY));
}
 
int get_recovery_mode_retrain_switch(void)
{
        /*
         * Check if the EC has posted the keyboard recovery event with memory
         * retrain.
         */
        return !!(google_chromeec_get_events_b() &
                  EC_HOST_EVENT_MASK(EC_HOST_EVENT_KEYBOARD_RECOVERY_HW_REINIT));
}
 
static void elog_add_recovery_mode_switch_event(void)
{
        uint64_t events = google_chromeec_get_events_b();
        uint8_t event_byte = EC_HOST_EVENT_KEYBOARD_RECOVERY;
 
        if (!(events & EC_HOST_EVENT_MASK(EC_HOST_EVENT_KEYBOARD_RECOVERY)))
                return;
 
        if (events & EC_HOST_EVENT_MASK(EC_HOST_EVENT_KEYBOARD_RECOVERY_HW_REINIT))
                event_byte = EC_HOST_EVENT_KEYBOARD_RECOVERY_HW_REINIT;
 
        elog_add_event_byte(ELOG_TYPE_EC_EVENT, event_byte);
}
 
int clear_recovery_mode_switch(void)
{
        /* Log elog event before clearing */
        elog_add_recovery_mode_switch_event();
 
        /* Clear all host event bits requesting recovery mode. */
        return google_chromeec_clear_events_b(
                EC_HOST_EVENT_MASK(EC_HOST_EVENT_KEYBOARD_RECOVERY) |
                EC_HOST_EVENT_MASK(EC_HOST_EVENT_KEYBOARD_RECOVERY_HW_REINIT));
}