1 /* SPDX-License-Identifier: GPL-2.0-only */
2
3 #include <acpi/acpi.h>
4 #include <acpi/acpi_gnvs.h>
5 #include <console/console.h>
6 #include <cpu/x86/smm.h>
7 #include <ec/google/chromeec/ec.h>
8 #include <elog.h>
9 #include <halt.h>
10 #include "smm.h"
11
chromeec_process_one_event(void)12 static int chromeec_process_one_event(void)
13 {
14 uint8_t event = google_chromeec_get_event();
15
16 /* Log this event */
17 if (event)
18 elog_gsmi_add_event_byte(ELOG_TYPE_EC_EVENT, event);
19
20 switch (event) {
21 case EC_HOST_EVENT_LID_CLOSED:
22 printk(BIOS_DEBUG, "LID CLOSED, SHUTDOWN\n");
23
24 poweroff();
25 break;
26 }
27 return !!event;
28 }
29
chromeec_smi_process_events(void)30 void chromeec_smi_process_events(void)
31 {
32 /* Process all pending events */
33 while (chromeec_process_one_event())
34 ;
35 }
36
clear_pending_events(void)37 static void clear_pending_events(void)
38 {
39 struct ec_response_get_next_event mkbp_event;
40
41 while (google_chromeec_get_event() != EC_HOST_EVENT_NONE)
42 ;
43
44 printk(BIOS_DEBUG, "Clearing pending EC events. Error code EC_RES_UNAVAILABLE(9) is expected.\n");
45 while (google_chromeec_get_mkbp_event(&mkbp_event) == 0)
46 ;
47 }
48
chromeec_set_usb_charge_mode(int slp_type)49 void chromeec_set_usb_charge_mode(int slp_type)
50 {
51 bool usb0_disable = 0, usb1_disable = 0;
52
53 usb_charge_mode_from_gnvs(slp_type, &usb0_disable, &usb1_disable);
54
55 if (usb0_disable)
56 google_chromeec_set_usb_charge_mode(0, USB_CHARGE_MODE_DISABLED);
57
58 if (usb1_disable)
59 google_chromeec_set_usb_charge_mode(1, USB_CHARGE_MODE_DISABLED);
60 }
61
chromeec_smi_sleep(int slp_type,uint64_t s3_mask,uint64_t s5_mask)62 void chromeec_smi_sleep(int slp_type, uint64_t s3_mask, uint64_t s5_mask)
63 {
64 if (!google_chromeec_is_uhepi_supported()) {
65 switch (slp_type) {
66 case ACPI_S3:
67 /* Enable wake events */
68 google_chromeec_set_wake_mask(s3_mask);
69 break;
70 case ACPI_S4:
71 case ACPI_S5:
72 /* Enable wake events */
73 google_chromeec_set_wake_mask(s5_mask);
74 break;
75 }
76 }
77
78 /* Disable SCI and SMI events */
79 google_chromeec_set_smi_mask(0);
80 google_chromeec_set_sci_mask(0);
81
82 /* Clear pending events that may trigger immediate wake */
83 clear_pending_events();
84 }
85
chromeec_smi_device_event_sleep(int slp_type,uint64_t s3_mask,uint64_t s5_mask)86 void chromeec_smi_device_event_sleep(int slp_type, uint64_t s3_mask,
87 uint64_t s5_mask)
88 {
89 switch (slp_type) {
90 case ACPI_S3:
91 /* Enable device wake events */
92 google_chromeec_set_device_enabled_events(s3_mask);
93 break;
94 case ACPI_S5:
95 /* Enable device wake events */
96 google_chromeec_set_device_enabled_events(s5_mask);
97 break;
98 }
99
100 /* Read and clear pending events that may trigger immediate wake */
101 google_chromeec_get_device_current_events();
102 }
103
chromeec_smi_apmc(int apmc,uint64_t sci_mask,uint64_t smi_mask)104 void chromeec_smi_apmc(int apmc, uint64_t sci_mask, uint64_t smi_mask)
105 {
106 switch (apmc) {
107 case APM_CNT_ACPI_ENABLE:
108 google_chromeec_set_smi_mask(0);
109 clear_pending_events();
110 google_chromeec_set_sci_mask(sci_mask);
111 break;
112 case APM_CNT_ACPI_DISABLE:
113 google_chromeec_set_sci_mask(0);
114 clear_pending_events();
115 google_chromeec_set_smi_mask(smi_mask);
116 break;
117 }
118 }
119