1 files changed, 88 insertions, 0 deletions
diff --git a/drivers/arm/css/scmi/scmi_pwr_dmn_proto.c b/drivers/arm/css/scmi/scmi_pwr_dmn_proto.c
new file mode 100644
index 0000000..a342aa8
--- /dev/null
+++ b/drivers/arm/css/scmi/scmi_pwr_dmn_proto.c
@@ -0,0 +1,88 @@
+/*
+ * Copyright (c) 2017-2019, ARM Limited and Contributors. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#include <assert.h>
+
+#include <arch_helpers.h>
+#include <common/debug.h>
+#include <drivers/arm/css/scmi.h>
+
+#include "scmi_private.h"
+
+/*
+ * API to set the SCMI power domain power state.
+ */
+int scmi_pwr_state_set(void *p, uint32_t domain_id,
+					uint32_t scmi_pwr_state)
+{
+	mailbox_mem_t *mbx_mem;
+	unsigned int token = 0;
+	int ret;
+
+	/*
+	 * Only asynchronous mode of `set power state` command is allowed on
+	 * application processors.
+	 */
+	uint32_t pwr_state_set_msg_flag = SCMI_PWR_STATE_SET_FLAG_ASYNC;
+	scmi_channel_t *ch = (scmi_channel_t *)p;
+
+	validate_scmi_channel(ch);
+
+	scmi_get_channel(ch);
+
+	mbx_mem = (mailbox_mem_t *)(ch->info->scmi_mbx_mem);
+	mbx_mem->msg_header = SCMI_MSG_CREATE(SCMI_PWR_DMN_PROTO_ID,
+			SCMI_PWR_STATE_SET_MSG, token);
+	mbx_mem->len = SCMI_PWR_STATE_SET_MSG_LEN;
+	mbx_mem->flags = SCMI_FLAG_RESP_POLL;
+	SCMI_PAYLOAD_ARG3(mbx_mem->payload, pwr_state_set_msg_flag,
+						domain_id, scmi_pwr_state);
+
+	scmi_send_sync_command(ch);
+
+	/* Get the return values */
+	SCMI_PAYLOAD_RET_VAL1(mbx_mem->payload, ret);
+	assert(mbx_mem->len == SCMI_PWR_STATE_SET_RESP_LEN);
+	assert(token == SCMI_MSG_GET_TOKEN(mbx_mem->msg_header));
+
+	scmi_put_channel(ch);
+
+	return ret;
+}
+
+/*
+ * API to get the SCMI power domain power state.
+ */
+int scmi_pwr_state_get(void *p, uint32_t domain_id,
+					uint32_t *scmi_pwr_state)
+{
+	mailbox_mem_t *mbx_mem;
+	unsigned int token = 0;
+	int ret;
+	scmi_channel_t *ch = (scmi_channel_t *)p;
+
+	validate_scmi_channel(ch);
+
+	scmi_get_channel(ch);
+
+	mbx_mem = (mailbox_mem_t *)(ch->info->scmi_mbx_mem);
+	mbx_mem->msg_header = SCMI_MSG_CREATE(SCMI_PWR_DMN_PROTO_ID,
+			SCMI_PWR_STATE_GET_MSG, token);
+	mbx_mem->len = SCMI_PWR_STATE_GET_MSG_LEN;
+	mbx_mem->flags = SCMI_FLAG_RESP_POLL;
+	SCMI_PAYLOAD_ARG1(mbx_mem->payload, domain_id);
+
+	scmi_send_sync_command(ch);
+
+	/* Get the return values */
+	SCMI_PAYLOAD_RET_VAL2(mbx_mem->payload, ret, *scmi_pwr_state);
+	assert(mbx_mem->len == SCMI_PWR_STATE_GET_RESP_LEN);
+	assert(token == SCMI_MSG_GET_TOKEN(mbx_mem->msg_header));
+
+	scmi_put_channel(ch);
+
+	return ret;
+}