src/mainboard/samsung/lumpy/smihandler.c

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2
   3 #include <console/console.h>
   4 #include <cpu/x86/smm.h>
   5 #include <halt.h>
   6 #include <southbridge/intel/bd82x6x/pch.h>
   7 #include <southbridge/intel/bd82x6x/me.h>
   8 #include <northbridge/intel/sandybridge/sandybridge.h>
   9 #include <ec/smsc/mec1308/ec.h>
  10 #include "ec.h"
  11
  12 static u8 mainboard_smi_ec(void)
  13 {
  14         u8 cmd;
  15
  16         cmd = read_ec_command_byte(EC_GET_SMI_CAUSE);
  17
  18         switch (cmd) {
  19         case EC_LID_CLOSE:
  20                 printk(BIOS_DEBUG, "LID CLOSED, SHUTDOWN\n");
  21
  22                 /* Go to S5 */
  23                 poweroff();
  24                 break;
  25         }
  26
  27         return cmd;
  28 }
  29
  30 void mainboard_smi_gpi(u32 gpi_sts)
  31 {
  32         if (gpi_sts & (1 << EC_SMI_GPI)) {
  33                 /* Process all pending EC requests */
  34                 ec_set_ports(EC_MAILBOX_PORT, EC_MAILBOX_PORT+1);
  35                 while (mainboard_smi_ec() != 0xff);
  36
  37                 /* The EC may keep asserting SMI# for some
  38                  * period unless we kick it here.
  39                  */
  40                 send_ec_command(EC_SMI_DISABLE);
  41                 send_ec_command(EC_SMI_ENABLE);
  42         }
  43 }
  44
  45 int mainboard_smi_apmc(u8 apmc)
  46 {
  47         ec_set_ports(EC_MAILBOX_PORT, EC_MAILBOX_PORT+1);
  48
  49         switch (apmc) {
  50         case APM_CNT_ACPI_ENABLE:
  51                 send_ec_command(EC_SMI_DISABLE);
  52                 send_ec_command(EC_ACPI_ENABLE);
  53                 break;
  54
  55         case APM_CNT_ACPI_DISABLE:
  56                 send_ec_command(EC_SMI_ENABLE);
  57                 send_ec_command(EC_ACPI_DISABLE);
  58                 break;
  59         }
  60         return 0;
  61 }