plat/synquacer: enable SCMI support

Enable the SCMI protocol support in SynQuacer platform.
Aside from power domain, system power and apcore management protocol,
this commit adds the vendor specific protocol(0x80).
This vendor specific protocol is used to get the dram mapping information
from SCP.

Signed-off-by: Masahisa Kojima <masahisa.kojima@linaro.org>

3 files changed, 90 insertions, 0 deletions

diff --git a/drivers/arm/css/scmi/scmi_private.h b/drivers/arm/css/scmi/scmi_private.h
index 65305736..61437f6d 100644
--- a/drivers/arm/css/scmi/scmi_private.h
+++ b/drivers/arm/css/scmi/scmi_private.h
@@ -152,4 +152,9 @@ static inline void validate_scmi_channel(scmi_channel_t *ch)
 	assert(ch->info && ch->info->scmi_mbx_mem);
 }
 
+/*
+ * SCMI vendor specific protocol
+ */
+#define SCMI_SYS_VENDOR_EXT_PROTO_ID		0x80
+
 #endif /* SCMI_PRIVATE_H */
diff --git a/drivers/arm/css/scmi/vendor/scmi_sq.c b/drivers/arm/css/scmi/vendor/scmi_sq.c
new file mode 100644
index 00000000..2ae7ca15
--- /dev/null
+++ b/drivers/arm/css/scmi/vendor/scmi_sq.c
@@ -0,0 +1,60 @@
+/*
+ * Copyright (c) 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"
+#include "scmi_sq.h"
+
+#include <sq_common.h>
+
+/* SCMI messge ID to get the available DRAM region */
+#define SCMI_VENDOR_EXT_MEMINFO_GET_MSG		0x3
+
+/*
+ * API to get the available DRAM region
+ */
+int scmi_get_draminfo(void *p, struct draminfo *info)
+{
+	mailbox_mem_t *mbx_mem;
+	int token = 0, ret;
+	scmi_channel_t *ch = (scmi_channel_t *)p;
+	struct dram_info_resp response;
+
+	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_SYS_VENDOR_EXT_PROTO_ID,
+			SCMI_VENDOR_EXT_MEMINFO_GET_MSG, token);
+	mbx_mem->len = 8;
+	mbx_mem->flags = SCMI_FLAG_RESP_POLL;
+
+	scmi_send_sync_command(ch);
+
+	/*
+	 * Ensure that any read to the SCPI payload area is done after reading
+	 * the MHU register. If these 2 reads were reordered then the CPU would
+	 * read invalid payload data
+	 */
+	dmbld();
+
+	/* Get the return values */
+	SCMI_PAYLOAD_RET_VAL1(mbx_mem->payload, ret);
+
+	memcpy(&response, (void *)mbx_mem->payload, sizeof(response));
+
+	scmi_put_channel(ch);
+
+	*info = response.info;
+
+	return ret;
+}
diff --git a/drivers/arm/css/scmi/vendor/scmi_sq.h b/drivers/arm/css/scmi/vendor/scmi_sq.h
new file mode 100644
index 00000000..aee1a3a9
--- /dev/null
+++ b/drivers/arm/css/scmi/vendor/scmi_sq.h
@@ -0,0 +1,25 @@
+/*
+ * Copyright (c) 2019, ARM Limited and Contributors. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#ifndef SCMI_SQ_H
+#define SCMI_SQ_H
+
+#include <stddef.h>
+#include <stdint.h>
+
+#include <sq_common.h>
+
+/* Structure to represent available DRAM region */
+struct dram_info_resp {
+	int status;
+	int reserved;
+	struct draminfo info;
+};
+
+/* API to get the available DRAM region */
+int scmi_get_draminfo(void *p, struct draminfo *info);
+
+#endif /* SCMI_SQ_H */