src/mainboard/google/slippy/smihandler.c

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2
   3 #include <acpi/acpi.h>
   4 #include <arch/io.h>
   5 #include <console/console.h>
   6 #include <cpu/x86/smm.h>
   7 #include <soc/nvs.h>
   8 #include <southbridge/intel/lynxpoint/pch.h>
   9 #include <southbridge/intel/common/gpio.h>
  10 #include <southbridge/intel/lynxpoint/me.h>
  11 #include <northbridge/intel/haswell/haswell.h>
  12 #include <cpu/intel/haswell/haswell.h>
  13 #include <elog.h>
  14
  15 /* Include EC functions */
  16 #include <ec/google/chromeec/ec.h>
  17 #include "ec.h"
  18
  19 /* Codec enable: GPIO45 */
  20 #define GPIO_PP3300_CODEC_EN 45
  21 /* GPIO46 controls the WLAN_DISABLE_L signal. */
  22 #define GPIO_WLAN_DISABLE_L 46
  23 #define GPIO_LTE_DISABLE_L  59
  24
  25 static u8 mainboard_smi_ec(void)
  26 {
  27         u8 cmd = google_chromeec_get_event();
  28         u32 pm1_cnt;
  29
  30         /* Log this event */
  31         if (cmd)
  32                 elog_gsmi_add_event_byte(ELOG_TYPE_EC_EVENT, cmd);
  33
  34         switch (cmd) {
  35         case EC_HOST_EVENT_LID_CLOSED:
  36                 printk(BIOS_DEBUG, "LID CLOSED, SHUTDOWN\n");
  37
  38                 /* Go to S5 */
  39                 pm1_cnt = inl(get_pmbase() + PM1_CNT);
  40                 pm1_cnt |= (0xf << 10);
  41                 outl(pm1_cnt, get_pmbase() + PM1_CNT);
  42                 break;
  43         }
  44
  45         return cmd;
  46 }
  47
  48 /* gpi_sts is GPIO 47:32 */
  49 void mainboard_smi_gpi(u32 gpi_sts)
  50 {
  51         if (gpi_sts & (1 << (EC_SMI_GPI - 32))) {
  52                 /* Process all pending events */
  53                 while (mainboard_smi_ec() != 0);
  54         }
  55 }
  56
  57 void mainboard_smi_sleep(u8 slp_typ)
  58 {
  59         /* Disable USB charging if required */
  60         switch (slp_typ) {
  61         case ACPI_S3:
  62                 if (gnvs->s3u0 == 0)
  63                         google_chromeec_set_usb_charge_mode(
  64                                 0, USB_CHARGE_MODE_DISABLED);
  65                 if (gnvs->s3u1 == 0)
  66                         google_chromeec_set_usb_charge_mode(
  67                                 1, USB_CHARGE_MODE_DISABLED);
  68
  69                 /* Prevent leak from standby rail to WLAN rail in S3. */
  70                 set_gpio(GPIO_WLAN_DISABLE_L, 0);
  71                 set_gpio(GPIO_PP3300_CODEC_EN, 0);
  72                 /* Disable LTE */
  73                 set_gpio(GPIO_LTE_DISABLE_L, 0);
  74
  75                 /* Enable wake events */
  76                 google_chromeec_set_wake_mask(MAINBOARD_EC_S3_WAKE_EVENTS);
  77                 break;
  78         case ACPI_S4:
  79         case ACPI_S5:
  80                 if (gnvs->s5u0 == 0)
  81                         google_chromeec_set_usb_charge_mode(
  82                                 0, USB_CHARGE_MODE_DISABLED);
  83                 if (gnvs->s5u1 == 0)
  84                         google_chromeec_set_usb_charge_mode(
  85                                 1, USB_CHARGE_MODE_DISABLED);
  86
  87                 /* Prevent leak from standby rail to WLAN rail in S5. */
  88                 set_gpio(GPIO_WLAN_DISABLE_L, 0);
  89                 set_gpio(GPIO_PP3300_CODEC_EN, 0);
  90                 /* Disable LTE */
  91                 set_gpio(GPIO_LTE_DISABLE_L, 0);
  92
  93                 /* Enable wake events */
  94                 google_chromeec_set_wake_mask(MAINBOARD_EC_S5_WAKE_EVENTS);
  95                 break;
  96         }
  97
  98         /* Disable SCI and SMI events */
  99         google_chromeec_set_smi_mask(0);
 100         google_chromeec_set_sci_mask(0);
 101
 102         /* Clear pending events that may trigger immediate wake */
 103         while (google_chromeec_get_event() != EC_HOST_EVENT_NONE)
 104                 ;
 105 }
 106
 107 int mainboard_smi_apmc(u8 apmc)
 108 {
 109         switch (apmc) {
 110         case APM_CNT_ACPI_ENABLE:
 111                 google_chromeec_set_smi_mask(0);
 112                 /* Clear all pending events */
 113                 while (google_chromeec_get_event() != EC_HOST_EVENT_NONE)
 114                         ;
 115                 google_chromeec_set_sci_mask(MAINBOARD_EC_SCI_EVENTS);
 116                 break;
 117         case APM_CNT_ACPI_DISABLE:
 118                 google_chromeec_set_sci_mask(0);
 119                 /* Clear all pending events */
 120                 while (google_chromeec_get_event() != EC_HOST_EVENT_NONE)
 121                         ;
 122                 google_chromeec_set_smi_mask(MAINBOARD_EC_SMI_EVENTS);
 123                 break;
 124         }
 125         return 0;
 126 }