src/ec/google/chromeec/smihandler.c

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2
   3 #include <acpi/acpi.h>
   4 #include <acpi/acpi_gnvs.h>
   5 #include <console/console.h>
   6 #include <cpu/x86/smm.h>
   7 #include <ec/google/chromeec/ec.h>
   8 #include <elog.h>
   9 #include <halt.h>
  10 #include "smm.h"
  11
  12 static int chromeec_process_one_event(void)
  13 {
  14         uint8_t event = google_chromeec_get_event();
  15
  16         /* Log this event */
  17         if (event)
  18                 elog_gsmi_add_event_byte(ELOG_TYPE_EC_EVENT, event);
  19
  20         switch (event) {
  21         case EC_HOST_EVENT_LID_CLOSED:
  22                 printk(BIOS_DEBUG, "LID CLOSED, SHUTDOWN\n");
  23
  24                 poweroff();
  25                 break;
  26         }
  27         return !!event;
  28 }
  29
  30 void chromeec_smi_process_events(void)
  31 {
  32         /* Process all pending events */
  33         while (chromeec_process_one_event())
  34                 ;
  35 }
  36
  37 static void clear_pending_events(void)
  38 {
  39         struct ec_response_get_next_event mkbp_event;
  40
  41         while (google_chromeec_get_event() != EC_HOST_EVENT_NONE)
  42                 ;
  43
  44         printk(BIOS_DEBUG, "Clearing pending EC events. Error code EC_RES_UNAVAILABLE(9) is expected.\n");
  45         while (google_chromeec_get_mkbp_event(&mkbp_event) == 0)
  46                 ;
  47 }
  48
  49 void chromeec_set_usb_charge_mode(int slp_type)
  50 {
  51         bool usb0_disable = 0, usb1_disable = 0;
  52
  53         usb_charge_mode_from_gnvs(slp_type, &usb0_disable, &usb1_disable);
  54
  55         if (usb0_disable)
  56                 google_chromeec_set_usb_charge_mode(0, USB_CHARGE_MODE_DISABLED);
  57
  58         if (usb1_disable)
  59                 google_chromeec_set_usb_charge_mode(1, USB_CHARGE_MODE_DISABLED);
  60 }
  61
  62 void chromeec_smi_sleep(int slp_type, uint64_t s3_mask, uint64_t s5_mask)
  63 {
  64         if (!google_chromeec_is_uhepi_supported()) {
  65                 switch (slp_type) {
  66                 case ACPI_S3:
  67                         /* Enable wake events */
  68                         google_chromeec_set_wake_mask(s3_mask);
  69                         break;
  70                 case ACPI_S4:
  71                 case ACPI_S5:
  72                         /* Enable wake events */
  73                         google_chromeec_set_wake_mask(s5_mask);
  74                         break;
  75                 }
  76         }
  77
  78         /* Disable SCI and SMI events */
  79         google_chromeec_set_smi_mask(0);
  80         google_chromeec_set_sci_mask(0);
  81
  82         /* Clear pending events that may trigger immediate wake */
  83         clear_pending_events();
  84 }
  85
  86 void chromeec_smi_device_event_sleep(int slp_type, uint64_t s3_mask,
  87                                      uint64_t s5_mask)
  88 {
  89         switch (slp_type) {
  90         case ACPI_S3:
  91                 /* Enable device wake events */
  92                 google_chromeec_set_device_enabled_events(s3_mask);
  93                 break;
  94         case ACPI_S5:
  95                 /* Enable device wake events */
  96                 google_chromeec_set_device_enabled_events(s5_mask);
  97                 break;
  98         }
  99
 100         /* Read and clear pending events that may trigger immediate wake */
 101         google_chromeec_get_device_current_events();
 102 }
 103
 104 void chromeec_smi_apmc(int apmc, uint64_t sci_mask, uint64_t smi_mask)
 105 {
 106         switch (apmc) {
 107         case APM_CNT_ACPI_ENABLE:
 108                 google_chromeec_set_smi_mask(0);
 109                 clear_pending_events();
 110                 google_chromeec_set_sci_mask(sci_mask);
 111                 break;
 112         case APM_CNT_ACPI_DISABLE:
 113                 google_chromeec_set_sci_mask(0);
 114                 clear_pending_events();
 115                 google_chromeec_set_smi_mask(smi_mask);
 116                 break;
 117         }
 118 }