1 files changed, 47 insertions, 0 deletions
diff --git a/plat/mediatek/mt8192/drivers/spm/notifier/mt_spm_sspm_notifier.c b/plat/mediatek/mt8192/drivers/spm/notifier/mt_spm_sspm_notifier.c
new file mode 100644
index 000000000..e0ba03750
--- /dev/null
+++ b/plat/mediatek/mt8192/drivers/spm/notifier/mt_spm_sspm_notifier.c
@@ -0,0 +1,47 @@
+/*
+ * Copyright (c) 2020, MediaTek Inc. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#include <stddef.h>
+
+#include <lib/mmio.h>
+
+#include <mt_spm_notifier.h>
+#include <mt_spm_sspm_intc.h>
+
+#define MT_SPM_SSPM_MBOX_OFF(x)		(SSPM_MBOX_BASE + x)
+#define MT_SPM_MBOX(slot)		MT_SPM_SSPM_MBOX_OFF((slot << 2UL))
+
+#define SSPM_MBOX_SPM_LP_LOOKUP1	MT_SPM_MBOX(0)
+#define SSPM_MBOX_SPM_LP_LOOKUP2	MT_SPM_MBOX(1)
+#define SSPM_MBOX_SPM_LP1		MT_SPM_MBOX(2)
+#define SSPM_MBOX_SPM_LP2		MT_SPM_MBOX(3)
+
+#define MCUPM_MBOX_OFFSET_LP		0x0C55FDA4
+#define MCUPM_MBOX_ENTER_LP		0x454e0000
+#define MCUPM_MBOX_LEAVE_LP		0x4c450000
+#define MCUPM_MBOX_SLEEP_MASK		0x0000FFFF
+
+int mt_spm_sspm_notify(int type, unsigned int lp_mode)
+{
+	switch (type) {
+	case MT_SPM_NOTIFY_LP_ENTER:
+		mmio_write_32(SSPM_MBOX_SPM_LP1, lp_mode);
+		mmio_write_32(MCUPM_MBOX_OFFSET_LP, MCUPM_MBOX_ENTER_LP |
+			      (lp_mode & MCUPM_MBOX_SLEEP_MASK));
+		DO_SPM_SSPM_LP_SUSPEND();
+		break;
+	case MT_SPM_NOTIFY_LP_LEAVE:
+		mmio_write_32(SSPM_MBOX_SPM_LP1, lp_mode);
+		mmio_write_32(MCUPM_MBOX_OFFSET_LP, MCUPM_MBOX_LEAVE_LP |
+			      (lp_mode & MCUPM_MBOX_SLEEP_MASK));
+		DO_SPM_SSPM_LP_RESUME();
+		break;
+	default:
+		break;
+	}
+
+	return 0;
+}