[RFC PATCH 2/2] fpga: xilinx: allow loading authenticated images (DDR)

[Jorge Ramirez-Ortiz <jorge@foundries.io>]

Add new compatible string u-boot,zynqmp-fpga-ddrauth to handle this
use case.

Signed-off-by: Jorge Ramirez-Ortiz <jorge@foundries.io>
---
 drivers/fpga/xilinx.c   | 29 +++++++++++++++++++++++++----
 drivers/fpga/zynqmppl.c |  4 ++--
 include/xilinx.h        |  2 +-
 3 files changed, 28 insertions(+), 7 deletions(-)

diff --git a/drivers/fpga/xilinx.c b/drivers/fpga/xilinx.c
index cbebefb55f..c8035105e2 100644
--- a/drivers/fpga/xilinx.c
+++ b/drivers/fpga/xilinx.c
@@ -135,23 +135,44 @@ int fpga_loadbitstream(int devnum, char *fpgadata, size_t size,
 	dataptr += 4;
 	printf("  bytes in bitstream = %d\n", swapsize);
 
-	return fpga_load(devnum, dataptr, swapsize, bstype);
+	return fpga_load(devnum, dataptr, swapsize, bstype, NULL);
 }
 
 int xilinx_load(xilinx_desc *desc, const void *buf, size_t bsize,
-		bitstream_type bstype)
+		bitstream_type bstype, const char *compatible)
 {
+	struct fpga_secure_info info = { 0 };
+
 	if (!xilinx_validate (desc, (char *)__FUNCTION__)) {
 		printf ("%s: Invalid device descriptor\n", __FUNCTION__);
 		return FPGA_FAIL;
 	}
 
-	if (!desc->operations || !desc->operations->load) {
+	if (!desc->operations) {
 		printf("%s: Missing load operation\n", __func__);
 		return FPGA_FAIL;
 	}
 
-	return desc->operations->load(desc, buf, bsize, bstype);
+	if (!compatible || !strcmp(compatible, "u-boot,fpga-legacy")) {
+		if (!desc->operations->load) {
+			printf("%s: Missing load operation\n", __func__);
+			return FPGA_FAIL;
+		}
+		return desc->operations->load(desc, buf, bsize, bstype);
+	}
+
+	if (!strcmp(compatible, "u-boot,zynqmp-fpga-ddrauth")) {
+		if (!desc->operations->loads) {
+			printf("%s: Missing load operation\n", __func__);
+			return FPGA_FAIL;
+		}
+		/* DDR authentication */
+		info.authflag = 1;
+		return desc->operations->loads(desc, buf, bsize, &info);
+	}
+
+	printf("%s: compatible support not implemented\n", __func__);
+	return FPGA_FAIL;
 }
 
 #if defined(CONFIG_CMD_FPGA_LOADFS)
diff --git a/drivers/fpga/zynqmppl.c b/drivers/fpga/zynqmppl.c
index 6b394869db..65a9412123 100644
--- a/drivers/fpga/zynqmppl.c
+++ b/drivers/fpga/zynqmppl.c
@@ -245,7 +245,7 @@ static int zynqmp_load(xilinx_desc *desc, const void *buf, size_t bsize,
 	return ret;
 }
 
-#if defined(CONFIG_CMD_FPGA_LOAD_SECURE) && !defined(CONFIG_SPL_BUILD)
+#if defined(CONFIG_CMD_FPGA_LOAD_SECURE)
 static int zynqmp_loads(xilinx_desc *desc, const void *buf, size_t bsize,
 			struct fpga_secure_info *fpga_sec_info)
 {
@@ -306,7 +306,7 @@ static int zynqmp_pcap_info(xilinx_desc *desc)
 
 struct xilinx_fpga_op zynqmp_op = {
 	.load = zynqmp_load,
-#if defined(CONFIG_CMD_FPGA_LOAD_SECURE) && !defined(CONFIG_SPL_BUILD)
+#if defined(CONFIG_CMD_FPGA_LOAD_SECURE)
 	.loads = zynqmp_loads,
 #endif
 	.info = zynqmp_pcap_info,
diff --git a/include/xilinx.h b/include/xilinx.h
index ab4537becf..ae78009e6b 100644
--- a/include/xilinx.h
+++ b/include/xilinx.h
@@ -59,7 +59,7 @@ struct xilinx_fpga_op {
 /* Generic Xilinx Functions
  *********************************************************************/
 int xilinx_load(xilinx_desc *desc, const void *image, size_t size,
-		bitstream_type bstype);
+		bitstream_type bstype, const char *compatible);
 int xilinx_dump(xilinx_desc *desc, const void *buf, size_t bsize);
 int xilinx_info(xilinx_desc *desc);
 int xilinx_loadfs(xilinx_desc *desc, const void *buf, size_t bsize,
-- 
2.31.1