From d9e2f78b50e0ff85250df6e930b61a47fd28968b Mon Sep 17 00:00:00 2001
From: Mitsuru IWASAKI <iwasaki@FreeBSD.org>
Date: Wed, 20 Sep 2000 01:53:11 +0000
Subject: [PATCH] Ignore power button and sleep button events for 5 sec. Wakeup
 event is generated by power button and/or sleep button on some laptops but
 this also generates SCI interrupt, and shutdown the system as result.  So
 this kind of mechanism is introduced so that acpi driver ignore given events
 for certain period.

---
 sys/dev/acpi/acpi.c | 25 +++++++++++++++++++++++--
 sys/dev/acpi/acpi.h |  1 +
 2 files changed, 24 insertions(+), 2 deletions(-)

diff --git a/sys/dev/acpi/acpi.c b/sys/dev/acpi/acpi.c
index a8b84a30a8d..afd39a6f917 100644
--- a/sys/dev/acpi/acpi.c
+++ b/sys/dev/acpi/acpi.c
@@ -153,6 +153,7 @@ static void acpi_process_event(acpi_softc_t *sc,
 			       u_int32_t status_0, u_int32_t status_1);
 static void acpi_intr(void *data);
 static void acpi_enable_events(acpi_softc_t *sc);
+static void acpi_clear_ignore_events(void *arg);
 
 /* New-bus dependent code */
 static acpi_softc_t *acpi_get_softc(dev_t dev);
@@ -834,6 +835,10 @@ acpi_trans_sleeping_state(acpi_softc_t *sc, u_int8_t state)
 		val_a = ACPI_PM1_WAK_STS;
 		val_b = ACPI_PM1_WAK_STS;
 		acpi_io_pm1_status(sc, ACPI_REGISTERS_OUTPUT, &val_a, &val_b);
+
+		/* ignore power button and sleep button events for 5 sec. */
+		sc->ignore_events = ACPI_PM1_PWRBTN_EN | ACPI_PM1_SLPBTN_EN;
+		timeout(acpi_clear_ignore_events, (caddr_t)sc, hz * 5);
 	}
 
 	acpi_io_pm1_control(sc, ACPI_REGISTERS_INPUT, &val_a, &val_b);
@@ -1001,11 +1006,19 @@ acpi_process_event(acpi_softc_t *sc, u_int32_t status_a, u_int32_t status_b,
 {
 
 	if (status_a & ACPI_PM1_PWRBTN_EN || status_b & ACPI_PM1_PWRBTN_EN) {
-		acpi_set_sleeping_state(sc, ACPI_S_STATE_S5);
+		if (sc->ignore_events & ACPI_PM1_PWRBTN_EN) {
+			ACPI_DEBUGPRINT("PWRBTN event ingnored\n");
+		} else {
+			acpi_set_sleeping_state(sc, ACPI_S_STATE_S5);
+		}
 	}
 
 	if (status_a & ACPI_PM1_SLPBTN_EN || status_b & ACPI_PM1_SLPBTN_EN) {
-		acpi_set_sleeping_state(sc, ACPI_S_STATE_S1);
+		if (sc->ignore_events & ACPI_PM1_SLPBTN_EN) {
+			ACPI_DEBUGPRINT("SLPBTN event ingnored\n");
+		} else {
+			acpi_set_sleeping_state(sc, ACPI_S_STATE_S1);
+		}
 	}
 }
 
@@ -1166,6 +1179,14 @@ acpi_enable_events(acpi_softc_t *sc)
 	acpi_io_pm_timer(sc, ACPI_REGISTERS_INPUT,  &status_a);
 }
 
+static void
+acpi_clear_ignore_events(void *arg)
+{
+
+	((acpi_softc_t *)arg)->ignore_events = 0;
+	ACPI_DEBUGPRINT("ignore events cleared\n");
+}
+
 /*
  * Character device stuff
  */
diff --git a/sys/dev/acpi/acpi.h b/sys/dev/acpi/acpi.h
index 5c4cb2e604c..59c60c2d5ba 100644
--- a/sys/dev/acpi/acpi.h
+++ b/sys/dev/acpi/acpi.h
@@ -68,6 +68,7 @@ typedef struct acpi_softc {
 	int	system_state_initialized;
 	int	broken_wakeuplogic;
 	int	enabled;
+	u_int32_t ignore_events;
 	struct	acpi_system_state_package system_state_package;
 	LIST_HEAD(, acpi_powerres_info) acpi_powerres_inflist;
 	LIST_HEAD(, acpi_powerres_device) acpi_powerres_devlist;