src/mainboard/lenovo/t430s/smihandler.c

   1 /*
   2  * This file is part of the coreboot project.
   3  *
   4  *
   5  * This program is free software; you can redistribute it and/or
   6  * modify it under the terms of the GNU General Public License as
   7  * published by the Free Software Foundation; version 2 of
   8  * the License.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  */
  15
  16 #include <arch/io.h>
  17 #include <console/console.h>
  18 #include <cpu/x86/smm.h>
  19 #include <ec/acpi/ec.h>
  20 #include <ec/lenovo/h8/h8.h>
  21 #include <southbridge/intel/common/pmutil.h>
  22 #include <southbridge/intel/bd82x6x/pch.h>
  23
  24 #define GPE_EC_SCI      1
  25 #define GPE_EC_WAKE     13
  26
  27 static void mainboard_smi_handle_ec_sci(void)
  28 {
  29         u8 status = inb(EC_SC);
  30         u8 event;
  31
  32         if (!(status & EC_SCI_EVT))
  33                 return;
  34
  35         event = ec_query();
  36         printk(BIOS_DEBUG, "EC event %02x\n", event);
  37 }
  38
  39 void mainboard_smi_gpi(u32 gpi_sts)
  40 {
  41         if (gpi_sts & (1 << GPE_EC_SCI))
  42                 mainboard_smi_handle_ec_sci();
  43 }
  44
  45 int mainboard_smi_apmc(u8 data)
  46 {
  47         switch (data) {
  48         case APM_CNT_ACPI_ENABLE:
  49                 /* use 0x1600/0x1604 to prevent races with userspace */
  50                 ec_set_ports(0x1604, 0x1600);
  51                 /* route EC_SCI to SCI */
  52                 gpi_route_interrupt(GPE_EC_SCI, GPI_IS_SCI);
  53                 /* discard all events, and enable attention */
  54                 ec_write(0x80, 0x01);
  55                 break;
  56         case APM_CNT_ACPI_DISABLE:
  57                 /* we have to use port 0x62/0x66, as 0x1600/0x1604 doesn't
  58                    provide a EC query function */
  59                 ec_set_ports(0x66, 0x62);
  60                 /* route EC_SCI to SMI */
  61                 gpi_route_interrupt(GPE_EC_SCI, GPI_IS_SMI);
  62                 /* discard all events, and enable attention */
  63                 ec_write(0x80, 0x01);
  64                 break;
  65         default:
  66                 break;
  67         }
  68         return 0;
  69 }
  70
  71 void mainboard_smi_sleep(u8 slp_typ)
  72 {
  73         if (slp_typ == 3) {
  74                 u8 ec_wake = ec_read(0x32);
  75                 /* If EC wake events are enabled, enable wake on EC WAKE GPE. */
  76                 if (ec_wake & 0x14) {
  77                         /* Redirect EC WAKE GPE to SCI. */
  78                         gpi_route_interrupt(GPE_EC_WAKE, GPI_IS_SCI);
  79                 }
  80         }
  81 }