cmd: broadcom: add command for chimp handshake

Add command for chimp handshake.
Handshake is used to know chimp is loaded and booted successfully.

Signed-off-by: Bharat Kumar Reddy Gooty <bharat.gooty@broadcom.com>
Signed-off-by: Rayagonda Kokatanur <rayagonda.kokatanur@broadcom.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

cmd/broadcom/Makefile

@@ -3,3 +3,4 @@
 
 obj-y += chimp_boot.o
 obj-y += nitro_image_load.o
+obj-y += chimp_handshake.o

cmd/broadcom/chimp_handshake.c

@@ -0,0 +1,33 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright 2020 Broadcom
+ */
+
+#include <common.h>
+#include <command.h>
+#include <broadcom/chimp.h>
+
+/* This command should be called after loading the nitro binaries */
+static int do_chimp_hs(struct cmd_tbl *cmdtp, int flag, int argc,
+		       char *const argv[])
+{
+	int ret = CMD_RET_USAGE;
+	u32 hstatus;
+
+	/* Returns 1, if handshake call is success */
+	if (chimp_handshake_status_optee(0, &hstatus))
+		ret = CMD_RET_SUCCESS;
+
+	if (hstatus == CHIMP_HANDSHAKE_SUCCESS)
+		printf("ChiMP Handshake successful\n");
+	else
+		printf("ERROR: ChiMP Handshake status 0x%x\n", hstatus);
+
+	return ret;
+}
+
+U_BOOT_CMD
+	(chimp_hs, 1, 1, do_chimp_hs,
+	 "Verify the Chimp handshake",
+	 "chimp_hs\n"
+);

include/broadcom/chimp.h

@@ -15,6 +15,12 @@
  */
 #define BCM_CHIMP_RUNNIG_GOOD	0x8000
 
+enum {
+	CHIMP_HANDSHAKE_SUCCESS = 0,
+	CHIMP_HANDSHAKE_WAIT_ERROR,
+	CHIMP_HANDSHAKE_WAIT_TIMEOUT,
+};
+
 /**
  * chimp_fastboot_optee() - api to load bnxt firmware
  *