src/mainboard/google/stout/ec.c

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2
   3 #include <bootmode.h>
   4 #include <types.h>
   5 #include <console/console.h>
   6 #include <ec/quanta/it8518/ec.h>
   7 #include <device/device.h>
   8 #include <southbridge/intel/bd82x6x/pch.h>
   9 #include <southbridge/intel/common/pmbase.h>
  10 #include "ec.h"
  11
  12 void stout_ec_init(void)
  13 {
  14         printk(BIOS_DEBUG,"%s: EC FW version %x%x\n", __func__,
  15                         ec_read(EC_FW_VER), ec_read(EC_FW_VER + 1));
  16
  17         /*
  18          *  Important: get_recovery_mode_switch() must be called in EC init.
  19          */
  20         get_recovery_mode_switch();
  21
  22         /* Unmute */
  23         ec_kbc_write_cmd(EC_KBD_CMD_UNMUTE);
  24
  25         /*
  26          * Set USB Power off in S3 (enabled in S3 path if requested in gnvs)
  27          * Bit0 of 0x0D/Bit0 of 0x26
  28          * 0/0 All USB port off
  29          * 1/0 USB on, all USB port didn't support wake up
  30          * 0/1 USB on, yellow port support wake up charge, but may not support
  31          *             charge smart phone.
  32          * 1/1 USB on, yellow port in AUTO mode and didn't support wake up system.
  33          */
  34         ec_write(EC_PERIPH_CNTL_3, ec_read(EC_PERIPH_CNTL_3) & 0xE);
  35         ec_write(EC_USB_S3_EN, ec_read(EC_USB_S3_EN) & 0xE);
  36
  37         // TODO: Power Limit Setting
  38 }
  39
  40 void stout_ec_finalize_smm(void)
  41 {
  42         u8 ec_reg, critical_shutdown = 0;
  43
  44         /*
  45          * Check EC for error conditions.
  46          */
  47
  48         /* Fan Error : Peripheral Status 3 (0x35) bit 4 */
  49         ec_reg = ec_read(EC_PERIPH_STAT_3);
  50
  51         if (ec_reg & 0x8) {
  52                 printk(BIOS_ERR, "  EC Fan Error\n");
  53                 critical_shutdown = 1;
  54         }
  55
  56         /* Thermal Device Error : Peripheral Status 3 (0x35) bit 8 */
  57         if (ec_reg & 0x80) {
  58                 printk(BIOS_ERR, "  EC Thermal Device Error\n");
  59                 critical_shutdown = 1;
  60         }
  61
  62         /* Critical Battery Error */
  63         ec_reg = ec_read(EC_MBAT_STATUS);
  64
  65         if ((ec_reg & 0xCF) == 0xC0) {
  66                 printk(BIOS_ERR, "  EC Critical Battery Error\n");
  67                 critical_shutdown = 1;
  68         }
  69
  70         if ((ec_reg & 0x8F) == 0x8F) {
  71                 printk(BIOS_ERR, "  EC Read Battery Error\n");
  72         }
  73
  74         if (critical_shutdown) {
  75                 printk(BIOS_ERR, "EC critical_shutdown");
  76
  77                 /* Go to S5 */
  78                 write_pmbase32(PM1_CNT, read_pmbase32(PM1_CNT) | (0xf << 10));
  79         }
  80 }