src/mainboard/google/glados/smihandler.c

   1 /*
   2  * This file is part of the coreboot project.
   3  *
   4  * Copyright (C) 2008-2009 coresystems GmbH
   5  * Copyright (C) 2015 Google Inc.
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License as published by
   9  * the Free Software Foundation; version 2 of the License.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program; if not, write to the Free Software
  18  * Foundation, Inc.
  19  */
  20
  21 #include <arch/io.h>
  22 #include <console/console.h>
  23 #include <cpu/x86/smm.h>
  24 #include <elog.h>
  25 #include <ec/google/chromeec/ec.h>
  26 #include <soc/iomap.h>
  27 #include <soc/nvs.h>
  28 #include <soc/pm.h>
  29 #include <soc/smm.h>
  30 #include "ec.h"
  31 #include "gpio.h"
  32
  33 int mainboard_io_trap_handler(int smif)
  34 {
  35         switch (smif) {
  36         case 0x99:
  37                 printk(BIOS_DEBUG, "Sample\n");
  38                 smm_get_gnvs()->smif = 0;
  39                 break;
  40         default:
  41                 return 0;
  42         }
  43
  44         /* On success, the IO Trap Handler returns 0
  45          * On failure, the IO Trap Handler returns a value != 0
  46          *
  47          * For now, we force the return value to 0 and log all traps to
  48          * see what's going on.
  49          */
  50         return 1;
  51 }
  52
  53 static u8 mainboard_smi_ec(void)
  54 {
  55         u8 cmd = 0;
  56 #if IS_ENABLED(CONFIG_EC_GOOGLE_CHROMEEC)
  57         u32 pm1_cnt;
  58         cmd = google_chromeec_get_event();
  59
  60         /* Log this event */
  61         if (IS_ENABLED(CONFIG_ELOG_GSMI) && cmd)
  62                 elog_add_event_byte(ELOG_TYPE_EC_EVENT, cmd);
  63
  64         switch (cmd) {
  65         case EC_HOST_EVENT_LID_CLOSED:
  66                 printk(BIOS_DEBUG, "LID CLOSED, SHUTDOWN\n");
  67
  68                 /* Go to S5 */
  69                 pm1_cnt = inl(ACPI_BASE_ADDRESS + PM1_CNT);
  70                 pm1_cnt |= (0xf << 10);
  71                 outl(pm1_cnt, ACPI_BASE_ADDRESS + PM1_CNT);
  72                 break;
  73         }
  74 #endif
  75         return cmd;
  76 }
  77
  78 void mainboard_smi_gpi_handler(const struct gpi_status *sts)
  79 {
  80         if (gpi_status_get(sts, EC_SMI_GPI)) {
  81                 /* Process all pending events */
  82                 while (mainboard_smi_ec() != 0)
  83                         ;
  84         }
  85 }
  86
  87 void mainboard_smi_sleep(u8 slp_typ)
  88 {
  89 #if IS_ENABLED(CONFIG_EC_GOOGLE_CHROMEEC)
  90         switch (slp_typ) {
  91         case 3:
  92                 /* Enable wake events */
  93                 google_chromeec_set_wake_mask(MAINBOARD_EC_S3_WAKE_EVENTS);
  94                 break;
  95         case 5:
  96                 /* Enable wake events */
  97                 google_chromeec_set_wake_mask(MAINBOARD_EC_S5_WAKE_EVENTS);
  98                 break;
  99         }
 100
 101         /* Disable SCI and SMI events */
 102         google_chromeec_set_smi_mask(0);
 103         google_chromeec_set_sci_mask(0);
 104
 105         /* Clear pending events that may trigger immediate wake */
 106         while (google_chromeec_get_event() != 0)
 107                 ;
 108 #endif
 109 }
 110
 111 int mainboard_smi_apmc(u8 apmc)
 112 {
 113 #if IS_ENABLED(CONFIG_EC_GOOGLE_CHROMEEC)
 114         switch (apmc) {
 115         case APM_CNT_ACPI_ENABLE:
 116                 google_chromeec_set_smi_mask(0);
 117                 /* Clear all pending events */
 118                 while (google_chromeec_get_event() != 0)
 119                         ;
 120                 google_chromeec_set_sci_mask(MAINBOARD_EC_SCI_EVENTS);
 121                 break;
 122         case APM_CNT_ACPI_DISABLE:
 123                 google_chromeec_set_sci_mask(0);
 124                 /* Clear all pending events */
 125                 while (google_chromeec_get_event() != 0)
 126                         ;
 127                 google_chromeec_set_smi_mask(MAINBOARD_EC_SMI_EVENTS);
 128                 break;
 129         }
 130 #endif
 131         return 0;
 132 }