/* SPDX-License-Identifier: GPL-2.0-only */ #include <acpi/acpi.h> #include <arch/io.h> #include <console/console.h> #include <cpu/x86/smm.h> #include "ec.h" #include <ec/google/chromeec/ec.h> #include <elog.h> #include <soc/nvs.h> #include <soc/pm.h> #include <soc/gpio.h> #include "onboard.h" /* The wake gpio is SUS_GPIO[0]. */ #define WAKE_GPIO_EN SUS_GPIO_EN0 static uint8_t mainboard_smi_ec(void) { uint8_t cmd = google_chromeec_get_event(); uint16_t pmbase = get_pmbase(); uint32_t pm1_cnt; /* Log this event */ if (cmd) elog_gsmi_add_event_byte(ELOG_TYPE_EC_EVENT, cmd); switch (cmd) { case EC_HOST_EVENT_LID_CLOSED: printk(BIOS_DEBUG, "LID CLOSED, SHUTDOWN\n"); /* Go to S5 */ pm1_cnt = inl(pmbase + PM1_CNT); pm1_cnt |= SLP_EN | (SLP_TYP_S5 << SLP_TYP_SHIFT); outl(pm1_cnt, pmbase + PM1_CNT); break; } return cmd; } /* * The entire 32-bit ALT_GPIO_SMI register is passed as a parameter. Note, that * this includes the enable bits in the lower 16 bits. */ void mainboard_smi_gpi(uint32_t alt_gpio_smi) { if (alt_gpio_smi & (1 << EC_SMI_GPI)) { /* Process all pending events */ while (mainboard_smi_ec() != 0) ; } } void mainboard_smi_sleep(uint8_t slp_typ) { /* Disable USB charging if required */ switch (slp_typ) { case ACPI_S3: if (gnvs->s3u0 == 0) google_chromeec_set_usb_charge_mode( 0, USB_CHARGE_MODE_DISABLED); if (gnvs->s3u1 == 0) google_chromeec_set_usb_charge_mode( 1, USB_CHARGE_MODE_DISABLED); /* Enable wake events */ google_chromeec_set_wake_mask(MAINBOARD_EC_S3_WAKE_EVENTS); /* Enable wake pin in GPE block. */ enable_gpe(WAKE_GPIO_EN); break; case ACPI_S5: if (gnvs->s5u0 == 0) google_chromeec_set_usb_charge_mode( 0, USB_CHARGE_MODE_DISABLED); if (gnvs->s5u1 == 0) google_chromeec_set_usb_charge_mode( 1, USB_CHARGE_MODE_DISABLED); /* Enable wake events */ google_chromeec_set_wake_mask(MAINBOARD_EC_S5_WAKE_EVENTS); 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 */ while (google_chromeec_get_event() != EC_HOST_EVENT_NONE) ; /* Set LPC lines to low power in S3/S5. */ if ((slp_typ == ACPI_S3) || (slp_typ == ACPI_S5)) lpc_set_low_power(); } int mainboard_smi_apmc(uint8_t apmc) { switch (apmc) { case APM_CNT_ACPI_ENABLE: google_chromeec_set_smi_mask(0); /* Clear all pending events */ while (google_chromeec_get_event() != EC_HOST_EVENT_NONE) ; google_chromeec_set_sci_mask(MAINBOARD_EC_SCI_EVENTS); break; case APM_CNT_ACPI_DISABLE: google_chromeec_set_sci_mask(0); /* Clear all pending events */ while (google_chromeec_get_event() != EC_HOST_EVENT_NONE) ; google_chromeec_set_smi_mask(MAINBOARD_EC_SMI_EVENTS); break; } return 0; }