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Diffstat (limited to 'src/mainboard/google/rambi/smihandler.c')
-rw-r--r--src/mainboard/google/rambi/smihandler.c108
1 files changed, 108 insertions, 0 deletions
diff --git a/src/mainboard/google/rambi/smihandler.c b/src/mainboard/google/rambi/smihandler.c
new file mode 100644
index 0000000000..c434860ea5
--- /dev/null
+++ b/src/mainboard/google/rambi/smihandler.c
@@ -0,0 +1,108 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+#include <acpi/acpi.h>
+#include <acpi/acpi_gnvs.h>
+#include <arch/io.h>
+#include <console/console.h>
+#include <cpu/x86/smm.h>
+#include <elog.h>
+
+#include <ec/google/chromeec/ec.h>
+#include "ec.h"
+
+#include <soc/nvs.h>
+#include <soc/pm.h>
+
+/* The wake gpio is SUS_GPIO[0]. */
+#define WAKE_GPIO_EN SUS_GPIO_EN0
+
+static uint8_t mainboard_smi_ec(void)
+{
+ uint8_t cmd = google_chromeec_get_event();
+ uint16_t pmbase = get_pmbase();
+ uint32_t pm1_cnt;
+
+ /* Log this event */
+ if (cmd)
+ elog_gsmi_add_event_byte(ELOG_TYPE_EC_EVENT, cmd);
+
+ switch (cmd) {
+ case EC_HOST_EVENT_LID_CLOSED:
+ printk(BIOS_DEBUG, "LID CLOSED, SHUTDOWN\n");
+
+ /* Go to S5 */
+ pm1_cnt = inl(pmbase + PM1_CNT);
+ pm1_cnt |= SLP_EN | (SLP_TYP_S5 << SLP_TYP_SHIFT);
+ outl(pm1_cnt, pmbase + PM1_CNT);
+ break;
+ }
+
+ return cmd;
+}
+
+/* The entire 32-bit ALT_GPIO_SMI register is passed as a parameter. Note, that
+ * this includes the enable bits in the lower 16 bits. */
+void mainboard_smi_gpi(uint32_t alt_gpio_smi)
+{
+ if (alt_gpio_smi & (1 << EC_SMI_GPI)) {
+ /* Process all pending events */
+ while (mainboard_smi_ec() != 0);
+ }
+}
+
+void mainboard_smi_sleep(uint8_t slp_typ)
+{
+ /* Disable USB charging if required */
+ switch (slp_typ) {
+ case ACPI_S3:
+ if (gnvs->s3u0 == 0)
+ google_chromeec_set_usb_charge_mode(
+ 0, USB_CHARGE_MODE_DISABLED);
+ if (gnvs->s3u1 == 0)
+ google_chromeec_set_usb_charge_mode(
+ 1, USB_CHARGE_MODE_DISABLED);
+
+ /* Enable wake events */
+ google_chromeec_set_wake_mask(MAINBOARD_EC_S3_WAKE_EVENTS);
+ /* Enable wake pin in GPE block. */
+ enable_gpe(WAKE_GPIO_EN);
+ break;
+ case ACPI_S5:
+ if (gnvs->s5u0 == 0)
+ google_chromeec_set_usb_charge_mode(
+ 0, USB_CHARGE_MODE_DISABLED);
+ if (gnvs->s5u1 == 0)
+ google_chromeec_set_usb_charge_mode(
+ 1, USB_CHARGE_MODE_DISABLED);
+
+ /* Enable wake events */
+ google_chromeec_set_wake_mask(MAINBOARD_EC_S5_WAKE_EVENTS);
+ break;
+ }
+
+ /* Disable SCI and SMI events */
+ google_chromeec_set_smi_mask(0);
+ google_chromeec_set_sci_mask(0);
+
+ /* Clear pending events that may trigger immediate wake */
+ while (google_chromeec_get_event() != 0);
+}
+
+int mainboard_smi_apmc(uint8_t apmc)
+{
+ switch (apmc) {
+ case APM_CNT_ACPI_ENABLE:
+ google_chromeec_set_smi_mask(0);
+ /* Clear all pending events */
+ while (google_chromeec_get_event() != 0);
+ google_chromeec_set_sci_mask(MAINBOARD_EC_SCI_EVENTS);
+ break;
+ case APM_CNT_ACPI_DISABLE:
+ google_chromeec_set_sci_mask(0);
+ /* Clear all pending events */
+ while (google_chromeec_get_event() != 0);
+ google_chromeec_set_smi_mask(MAINBOARD_EC_SMI_EVENTS);
+ break;
+ }
+ return 0;
+}