src/mainboard/lenovo/x201/smihandler.c

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2
   3 #include <arch/io.h>
   4 #include <console/console.h>
   5 #include <cpu/x86/smm.h>
   6 #include <southbridge/intel/common/pmutil.h>
   7 #include <northbridge/intel/ironlake/ironlake.h>
   8 #include <ec/acpi/ec.h>
   9 #include <ec/lenovo/h8/h8.h>
  10 #include <delay.h>
  11 #include "dock.h"
  12
  13 #define GPE_EC_SCI      1
  14 #define GPE_EC_WAKE     13
  15
  16 static void mainboard_smi_handle_ec_sci(void)
  17 {
  18         u8 status = inb(EC_SC);
  19         u8 event;
  20
  21         if (!(status & EC_SCI_EVT))
  22                 return;
  23
  24         event = ec_query();
  25         printk(BIOS_DEBUG, "EC event %#02x\n", event);
  26
  27         switch (event) {
  28         case 0x18:
  29                 /* Fn-F9 key */
  30         case 0x27:
  31                 /* Power loss */
  32         case 0x50:
  33                 /* Undock Key */
  34                 ec_clr_bit(0x03, 2);
  35                 dock_disconnect();
  36                 break;
  37         case 0x37:
  38         case 0x58:
  39                 /* Dock Event */
  40                 ec_clr_bit(0x03, 2);
  41                 mdelay(250);
  42                 dock_connect();
  43                 ec_set_bit(0x03, 2);
  44                 /* set dock LED to indicate status */
  45                 ec_write(0x0c, 0x09);
  46                 ec_write(0x0c, 0x88);
  47                 break;
  48         default:
  49                 break;
  50         }
  51 }
  52
  53 void mainboard_smi_gpi(u32 gpi_sts)
  54 {
  55         if (gpi_sts & (1 << GPE_EC_SCI))
  56                 mainboard_smi_handle_ec_sci();
  57 }
  58
  59 int mainboard_smi_apmc(u8 data)
  60 {
  61         switch (data) {
  62         case APM_CNT_ACPI_ENABLE:
  63                 /* use 0x1600/0x1604 to prevent races with userspace */
  64                 ec_set_ports(0x1604, 0x1600);
  65                 /* route H8SCI to SCI */
  66                 gpi_route_interrupt(GPE_EC_SCI, GPI_IS_SCI);
  67                 /* discard all events, and enable attention */
  68                 ec_write(0x80, 0x01);
  69                 break;
  70         case APM_CNT_ACPI_DISABLE:
  71                 /* we have to use port 0x62/0x66, as 0x1600/0x1604 doesn't
  72                    provide a EC query function */
  73                 ec_set_ports(0x66, 0x62);
  74                 /* route H8SCI# to SMI */
  75                 gpi_route_interrupt(GPE_EC_SCI, GPI_IS_SMI);
  76                 /* discard all events, and enable attention */
  77                 ec_write(0x80, 0x01);
  78                 break;
  79         default:
  80                 break;
  81         }
  82         return 0;
  83 }
  84
  85 void mainboard_smi_sleep(u8 slp_typ)
  86 {
  87         if (slp_typ == 3) {
  88                 u8 ec_wake = ec_read(0x32);
  89                 /* If EC wake events are enabled, enable wake on EC WAKE GPE. */
  90                 if (ec_wake & 0x14) {
  91                         /* Redirect EC WAKE GPE to SCI. */
  92                         gpi_route_interrupt(GPE_EC_WAKE, GPI_IS_SCI);
  93                 }
  94         }
  95 }