src/mainboard/dell/snb_ivb_workstations/smihandler.c

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2
   3 #include <stdint.h>
   4 #include <arch/io.h>
   5 #include <cpu/x86/smm.h>
   6 #include <superio/smsc/sch5545/sch5545.h>
   7
   8 int mainboard_smi_apmc(u8 data)
   9 {
  10         u8 val;
  11         switch (data) {
  12         case APM_CNT_ACPI_ENABLE:
  13                 /* Enable wake on PS2 */
  14                 val = inb(SCH5545_RUNTIME_REG_BASE + SCH5545_RR_PME_EN1);
  15                 val |= (SCH5545_KBD_PME_EN | SCH5545_MOUSE_PME_EN);
  16                 outb(val, SCH5545_RUNTIME_REG_BASE + SCH5545_RR_PME_EN1);
  17                 /* Clear pending and enable PMEs */
  18                 outb(SCH5545_GLOBAL_PME_STS, SCH5545_RUNTIME_REG_BASE + SCH5545_RR_PME_STS);
  19                 outb(SCH5545_GLOBAL_PME_EN, SCH5545_RUNTIME_REG_BASE + SCH5545_RR_PME_EN);
  20                 break;
  21         case APM_CNT_ACPI_DISABLE:
  22                 /* Disable wake on PS2 */
  23                 val = inb(SCH5545_RUNTIME_REG_BASE + SCH5545_RR_PME_EN1);
  24                 val &= ~(SCH5545_KBD_PME_EN | SCH5545_MOUSE_PME_EN);
  25                 outb(val, SCH5545_RUNTIME_REG_BASE + SCH5545_RR_PME_EN1);
  26                 /* Clear pending and disable PMEs */
  27                 outb(SCH5545_GLOBAL_PME_STS, SCH5545_RUNTIME_REG_BASE + SCH5545_RR_PME_STS);
  28                 outb(0, SCH5545_RUNTIME_REG_BASE + SCH5545_RR_PME_EN);
  29                 break;
  30         default:
  31                 break;
  32         }
  33         return 0;
  34 }