Can you send/point us to the spec that this change is based upon?
Thanks,
Bob
-----Original Message-----
From: Jianmin Lv <lvjianmin@xxxxxxxxxxx>
Sent: Thursday, April 01, 2021 5:06 AM
To: Moore, Robert <robert.moore@xxxxxxxxx>; Kaneda, Erik <erik.kaneda@xxxxxxxxx>; Wysocki, Rafael J <rafael.j.wysocki@xxxxxxxxx>; Len Brown <lenb@xxxxxxxxxx>
Cc: linux-acpi@xxxxxxxxxxxxxxx; devel@xxxxxxxxxx; linux-kernel@xxxxxxxxxxxxxxx; lvjianmin <lvjianmin@xxxxxxxxxxx>
Subject: [PATCH] ACPICA: Events: support fixed pcie wake event
From: lvjianmin <lvjianmin@xxxxxxxxxxx>
Some chipsets support fixed pcie wake event which is defined in the PM1 block, such as LS7A1000 of Loongson company, so we add code to handle it.
Signed-off-by: lvjianmin <lvjianmin@xxxxxxxxxxx>
diff --git a/drivers/acpi/acpica/evevent.c b/drivers/acpi/acpica/evevent.c index 35385148fedb..08ba368beb2d 100644
--- a/drivers/acpi/acpica/evevent.c
+++ b/drivers/acpi/acpica/evevent.c
@@ -185,6 +185,10 @@ u32 acpi_ev_fixed_event_detect(void)
return (int_status);
}
+ if (fixed_enable & ACPI_BITMASK_PCIEXP_WAKE_DISABLE)
+ fixed_enable &= ~ACPI_BITMASK_PCIEXP_WAKE_DISABLE;
+ else
+ fixed_enable |= ACPI_BITMASK_PCIEXP_WAKE_DISABLE;
ACPI_DEBUG_PRINT((ACPI_DB_INTERRUPTS,
"Fixed Event Block: Enable %08X Status %08X\n",
fixed_enable, fixed_status));
@@ -250,8 +254,8 @@ static u32 acpi_ev_fixed_event_dispatch(u32 event)
if (!acpi_gbl_fixed_event_handlers[event].handler) {
(void)acpi_write_bit_register(acpi_gbl_fixed_event_info[event].
enable_register_id,
- ACPI_DISABLE_EVENT);
-
+ event == ACPI_EVENT_PCIE_WAKE ?
+ ACPI_ENABLE_EVENT : ACPI_DISABLE_EVENT);
ACPI_ERROR((AE_INFO,
"No installed handler for fixed event - %s (%u), disabling",
acpi_ut_get_event_name(event), event)); diff --git a/drivers/acpi/acpica/hwsleep.c b/drivers/acpi/acpica/hwsleep.c index 14baa13bf848..7e7ea4c2e914 100644
--- a/drivers/acpi/acpica/hwsleep.c
+++ b/drivers/acpi/acpica/hwsleep.c
@@ -312,6 +312,18 @@ acpi_status acpi_hw_legacy_wake(u8 sleep_state)
[ACPI_EVENT_SLEEP_BUTTON].
status_register_id, ACPI_CLEAR_STATUS);
+ /* Enable pcie wake event if support */
+ if ((acpi_gbl_FADT.flags & ACPI_FADT_PCI_EXPRESS_WAKE)) {
+ (void)
+ acpi_write_bit_register(acpi_gbl_fixed_event_info
+ [ACPI_EVENT_PCIE_WAKE].
+ enable_register_id, ACPI_DISABLE_EVENT);
+ (void)
+ acpi_write_bit_register(acpi_gbl_fixed_event_info
+ [ACPI_EVENT_PCIE_WAKE].
+ status_register_id, ACPI_CLEAR_STATUS);
+ }
+
acpi_hw_execute_sleep_method(METHOD_PATHNAME__SST, ACPI_SST_WORKING);
return_ACPI_STATUS(status);
}
diff --git a/drivers/acpi/acpica/utglobal.c b/drivers/acpi/acpica/utglobal.c index 59a48371a7bc..68baf16d8a02 100644
--- a/drivers/acpi/acpica/utglobal.c
+++ b/drivers/acpi/acpica/utglobal.c
@@ -186,6 +186,10 @@ struct acpi_fixed_event_info acpi_gbl_fixed_event_info[ACPI_NUM_FIXED_EVENTS] =
ACPI_BITREG_RT_CLOCK_ENABLE,
ACPI_BITMASK_RT_CLOCK_STATUS,
ACPI_BITMASK_RT_CLOCK_ENABLE},
+ /* ACPI_EVENT_PCIE_WAKE */ {ACPI_BITREG_PCIEXP_WAKE_STATUS,
+ ACPI_BITREG_PCIEXP_WAKE_DISABLE,
+ ACPI_BITMASK_PCIEXP_WAKE_STATUS,
+ ACPI_BITMASK_PCIEXP_WAKE_DISABLE},
};
#endif /* !ACPI_REDUCED_HARDWARE */
diff --git a/include/acpi/actypes.h b/include/acpi/actypes.h index 92c71dfce0d5..0b6c72033487 100644
--- a/include/acpi/actypes.h
+++ b/include/acpi/actypes.h
@@ -714,7 +714,8 @@ typedef u32 acpi_event_type;
#define ACPI_EVENT_POWER_BUTTON 2
#define ACPI_EVENT_SLEEP_BUTTON 3
#define ACPI_EVENT_RTC 4
-#define ACPI_EVENT_MAX 4
+#define ACPI_EVENT_PCIE_WAKE 5
+#define ACPI_EVENT_MAX 5
#define ACPI_NUM_FIXED_EVENTS ACPI_EVENT_MAX + 1
/*
--
2.27.0
