src/mainboard/google/link/smihandler.c

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2
   3 #include <acpi/acpi.h>
   4 #include <console/console.h>
   5 #include <cpu/x86/smm.h>
   6 #include <soc/nvs.h>
   7 #include <southbridge/intel/bd82x6x/pch.h>
   8 #include <southbridge/intel/bd82x6x/me.h>
   9 #include <southbridge/intel/common/pmbase.h>
  10 #include <northbridge/intel/sandybridge/sandybridge.h>
  11 #include <elog.h>
  12
  13 /* Include EC functions */
  14 #include <ec/google/chromeec/ec.h>
  15 #include "ec.h"
  16
  17 static u8 mainboard_smi_ec(void)
  18 {
  19         u8 cmd = google_chromeec_get_event();
  20
  21         /* Log this event */
  22         if (cmd)
  23                 elog_gsmi_add_event_byte(ELOG_TYPE_EC_EVENT, cmd);
  24
  25         switch (cmd) {
  26         case EC_HOST_EVENT_LID_CLOSED:
  27                 printk(BIOS_DEBUG, "LID CLOSED, SHUTDOWN\n");
  28
  29                 /* Go to S5 */
  30                 write_pmbase32(PM1_CNT, read_pmbase32(PM1_CNT) | (0xf << 10));
  31                 break;
  32         }
  33
  34         return cmd;
  35 }
  36
  37 void mainboard_smi_gpi(u32 gpi_sts)
  38 {
  39         if (gpi_sts & (1 << EC_SMI_GPI)) {
  40                 /* Process all pending events */
  41                 while (mainboard_smi_ec() != 0);
  42         }
  43 }
  44
  45 void mainboard_smi_sleep(u8 slp_typ)
  46 {
  47         /* Disable USB charging if required */
  48         switch (slp_typ) {
  49         case ACPI_S3:
  50                 if (gnvs->s3u0 == 0)
  51                         google_chromeec_set_usb_charge_mode(
  52                                 0, USB_CHARGE_MODE_DISABLED);
  53                 if (gnvs->s3u1 == 0)
  54                         google_chromeec_set_usb_charge_mode(
  55                                 1, USB_CHARGE_MODE_DISABLED);
  56                 break;
  57         case ACPI_S5:
  58                 if (gnvs->s5u0 == 0)
  59                         google_chromeec_set_usb_charge_mode(
  60                                 0, USB_CHARGE_MODE_DISABLED);
  61                 if (gnvs->s5u1 == 0)
  62                         google_chromeec_set_usb_charge_mode(
  63                                 1, USB_CHARGE_MODE_DISABLED);
  64                 break;
  65         }
  66
  67         /* Disable SCI and SMI events */
  68         google_chromeec_set_smi_mask(0);
  69         google_chromeec_set_sci_mask(0);
  70
  71         /* Clear pending events that may trigger immediate wake */
  72         while (google_chromeec_get_event() != EC_HOST_EVENT_NONE)
  73                 ;
  74
  75         /* Enable wake events */
  76         google_chromeec_set_wake_mask(LINK_EC_S3_WAKE_EVENTS);
  77 }
  78
  79 int mainboard_smi_apmc(u8 apmc)
  80 {
  81         switch (apmc) {
  82         case APM_CNT_ACPI_ENABLE:
  83                 google_chromeec_set_smi_mask(0);
  84                 /* Clear all pending events */
  85                 while (google_chromeec_get_event() != EC_HOST_EVENT_NONE)
  86                         ;
  87                 google_chromeec_set_sci_mask(LINK_EC_SCI_EVENTS);
  88                 break;
  89         case APM_CNT_ACPI_DISABLE:
  90                 google_chromeec_set_sci_mask(0);
  91                 /* Clear all pending events */
  92                 while (google_chromeec_get_event() != EC_HOST_EVENT_NONE)
  93                         ;
  94                 google_chromeec_set_smi_mask(LINK_EC_SMI_EVENTS);
  95                 break;
  96         }
  97         return 0;
  98 }