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 <ec/acpi/ec.h>
7 #include <ec/lenovo/h8/h8.h>
8 #include <southbridge/intel/common/pmutil.h>
9 #include <southbridge/intel/bd82x6x/pch.h>
10
11 #define GPE_EC_SCI 1
12 #define GPE_EC_WAKE 13
13
mainboard_smi_handle_ec_sci(void)14 static void mainboard_smi_handle_ec_sci(void)
15 {
16 u8 status = inb(EC_SC);
17 u8 event;
18
19 if (!(status & EC_SCI_EVT))
20 return;
21
22 event = ec_query();
23 printk(BIOS_DEBUG, "EC event %#02x\n", event);
24 }
25
mainboard_smi_gpi(u32 gpi_sts)26 void mainboard_smi_gpi(u32 gpi_sts)
27 {
28 if (gpi_sts & (1 << GPE_EC_SCI))
29 mainboard_smi_handle_ec_sci();
30 }
31
mainboard_smi_apmc(u8 data)32 int mainboard_smi_apmc(u8 data)
33 {
34 switch (data) {
35 case APM_CNT_ACPI_ENABLE:
36 /* use 0x1600/0x1604 to prevent races with userspace */
37 ec_set_ports(0x1604, 0x1600);
38 /* route EC_SCI to SCI */
39 gpi_route_interrupt(GPE_EC_SCI, GPI_IS_SCI);
40 /* discard all events, and enable attention */
41 ec_write(0x80, 0x01);
42 break;
43 case APM_CNT_ACPI_DISABLE:
44 /* we have to use port 0x62/0x66, as 0x1600/0x1604 doesn't
45 provide a EC query function */
46 ec_set_ports(0x66, 0x62);
47 /* route EC_SCI to SMI */
48 gpi_route_interrupt(GPE_EC_SCI, GPI_IS_SMI);
49 /* discard all events, and enable attention */
50 ec_write(0x80, 0x01);
51 break;
52 default:
53 break;
54 }
55 return 0;
56 }
57
mainboard_smi_sleep(u8 slp_typ)58 void mainboard_smi_sleep(u8 slp_typ)
59 {
60 if (slp_typ == 3) {
61 u8 ec_wake = ec_read(0x32);
62 /* If EC wake events are enabled, enable wake on EC WAKE GPE. */
63 if (ec_wake & 0x14) {
64 /* Redirect EC WAKE GPE to SCI. */
65 gpi_route_interrupt(GPE_EC_WAKE, GPI_IS_SCI);
66 }
67 }
68 }
69