src/acpi/acpi_pm.c

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2
   3 #include <acpi/acpi.h>
   4 #include <acpi/acpi_pm.h>
   5 #include <assert.h>
   6 #include <cbmem.h>
   7 #include <console/console.h>
   8 #include <smbios.h>
   9
  10 static const char *pm_fetch_failure_msg[PS_CLAIMER_MAX] = {
  11         [PS_CLAIMER_ELOG]       = "no event recorded in ELOG.",
  12         [PS_CLAIMER_RTC]        = "RTC init aborted.",
  13         [PS_CLAIMER_WAKE]       = "wake source unknown.",
  14 };
  15
  16 void __weak mainboard_suspend_resume(void)
  17 {
  18 }
  19
  20 /* Default mapping to ACPI FADT preferred_pm_profile field. */
  21 uint8_t acpi_get_preferred_pm_profile(void)
  22 {
  23         switch (smbios_mainboard_enclosure_type()) {
  24         case SMBIOS_ENCLOSURE_LAPTOP:
  25         case SMBIOS_ENCLOSURE_CONVERTIBLE:
  26                 return PM_MOBILE;
  27         case SMBIOS_ENCLOSURE_DETACHABLE:
  28         case SMBIOS_ENCLOSURE_TABLET:
  29                 return PM_TABLET;
  30         case SMBIOS_ENCLOSURE_DESKTOP:
  31                 return PM_DESKTOP;
  32         case SMBIOS_ENCLOSURE_UNKNOWN:
  33         default:
  34                 return PM_UNSPECIFIED;
  35         }
  36 }
  37
  38 struct chipset_power_state *acpi_get_pm_state(void)
  39 {
  40         static struct chipset_power_state *acpi_pm_state;
  41         if (acpi_pm_state)
  42                 return acpi_pm_state;
  43
  44         acpi_pm_state = cbmem_find(CBMEM_ID_POWER_STATE);
  45         return acpi_pm_state;
  46 }
  47
  48 int acpi_fetch_pm_state(const struct chipset_power_state **ps,
  49                         enum power_state_claimer ps_claimer)
  50 {
  51         assert(ps_claimer < PS_CLAIMER_MAX);
  52         *ps = acpi_get_pm_state();
  53
  54         if (!*ps) {
  55                 printk(BIOS_ERR, "No CBMEM_ID_POWER_STATE entry, %s\n",
  56                        ps_claimer < PS_CLAIMER_MAX ?
  57                        pm_fetch_failure_msg[ps_claimer] : "unknown claimer.");
  58                 return -1;
  59         }
  60         return 0;
  61 }