1 files changed, 120 insertions, 0 deletions
diff --git a/plat/imx/common/sci/ipc.c b/plat/imx/common/sci/ipc.c
new file mode 100644
index 0000000..5769119
--- /dev/null
+++ b/plat/imx/common/sci/ipc.c
@@ -0,0 +1,120 @@
+/*
+ * Copyright (c) 2015-2019, ARM Limited and Contributors. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#include <stdlib.h>
+
+#include <lib/bakery_lock.h>
+
+#include <sci/sci_scfw.h>
+#include <sci/sci_ipc.h>
+#include <sci/sci_rpc.h>
+#include "imx8_mu.h"
+
+sc_ipc_t ipc_handle;
+
+DEFINE_BAKERY_LOCK(sc_ipc_bakery_lock);
+#define sc_ipc_lock_init()	bakery_lock_init(&sc_ipc_bakery_lock)
+#define sc_ipc_lock()		bakery_lock_get(&sc_ipc_bakery_lock)
+#define sc_ipc_unlock()		bakery_lock_release(&sc_ipc_bakery_lock)
+
+void sc_call_rpc(sc_ipc_t ipc, sc_rpc_msg_t *msg, bool no_resp)
+{
+	sc_ipc_lock();
+
+	sc_ipc_write(ipc, msg);
+	if (!no_resp)
+		sc_ipc_read(ipc, msg);
+
+	sc_ipc_unlock();
+}
+
+sc_err_t sc_ipc_open(sc_ipc_t *ipc, sc_ipc_id_t id)
+{
+	uint32_t base = id;
+	uint32_t i;
+
+	/* Get MU base associated with IPC channel */
+	if ((ipc == NULL) || (base == 0))
+		return SC_ERR_IPC;
+
+	sc_ipc_lock_init();
+
+	/* Init MU */
+	MU_Init(base);
+
+	/* Enable all RX interrupts */
+	for (i = 0; i < MU_RR_COUNT; i++) {
+		MU_EnableRxFullInt(base, i);
+	}
+
+	/* Return MU address as handle */
+	*ipc = (sc_ipc_t) id;
+
+	return SC_ERR_NONE;
+}
+
+void sc_ipc_close(sc_ipc_t ipc)
+{
+	uint32_t base = ipc;
+
+	if (base != 0)
+		MU_Init(base);
+}
+
+void sc_ipc_read(sc_ipc_t ipc, void *data)
+{
+	uint32_t base = ipc;
+	sc_rpc_msg_t *msg = (sc_rpc_msg_t *) data;
+	uint8_t count = 0;
+
+	/* Check parms */
+	if ((base == 0) || (msg == NULL))
+		return;
+
+	/* Read first word */
+	MU_ReceiveMsg(base, 0, (uint32_t *) msg);
+	count++;
+
+	/* Check size */
+	if (msg->size > SC_RPC_MAX_MSG) {
+		*((uint32_t *) msg) = 0;
+		return;
+	}
+
+	/* Read remaining words */
+	while (count < msg->size) {
+		MU_ReceiveMsg(base, count % MU_RR_COUNT,
+			&(msg->DATA.u32[count - 1]));
+		count++;
+	}
+}
+
+void sc_ipc_write(sc_ipc_t ipc, void *data)
+{
+	sc_rpc_msg_t *msg = (sc_rpc_msg_t *) data;
+	uint32_t base = ipc;
+	uint8_t count = 0;
+
+	/* Check parms */
+	if ((base == 0) || (msg == NULL))
+		return;
+
+	/* Check size */
+	if (msg->size > SC_RPC_MAX_MSG)
+		return;
+
+	/* Write first word */
+	MU_SendMessage(base, 0, *((uint32_t *) msg));
+	count++;
+
+	/* Write remaining words */
+	while (count < msg->size) {
+		MU_SendMessage(base, count % MU_TR_COUNT,
+			msg->DATA.u32[count - 1]);
+		count++;
+	}
+}
+