arm64: versal: fpga: Add PL bit stream load support

This patch adds PL bitstream load support for Versal platform. The PL
bitstream is loaded by making an SMC to ATF which in turn communicates
with platform firmware which configures and loads PL bitstream on to PL.

Signed-off-by: Siva Durga Prasad Paladugu <siva.durga.paladugu@xilinx.com>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>

board/xilinx/versal/board.c

@@ -11,13 +11,23 @@
 #include <asm/arch/hardware.h>
 #include <dm/device.h>
 #include <dm/uclass.h>
+#include <versalpl.h>
 
 DECLARE_GLOBAL_DATA_PTR;
 
+#if defined(CONFIG_FPGA_VERSALPL)
+static xilinx_desc versalpl = XILINX_VERSAL_DESC;
+#endif
+
 int board_init(void)
 {
 	printf("EL Level:\tEL%d\n", current_el());
 
+#if defined(CONFIG_FPGA_VERSALPL)
+	fpga_init();
+	fpga_add(fpga_xilinx, &versalpl);
+#endif
+
 	return 0;
 }
 

drivers/fpga/Kconfig

@@ -56,6 +56,15 @@ config FPGA_ZYNQMPPL
 	  Enable FPGA driver for loading bitstream in BIT and BIN format
 	  on Xilinx Zynq UltraScale+ (ZynqMP) device.
 
+config FPGA_VERSALPL
+	bool "Enable Xilinx FPGA driver for Versal"
+	depends on FPGA_XILINX
+	help
+	  Enable FPGA driver for loading bitstream in PDI format on Xilinx
+	  Versal device. PDI is a new programmable device image format for
+	  Versal. The bitstream will only be generated as PDI for Versal
+	  platform.
+
 config FPGA_SPARTAN3
 	bool "Enable Spartan3 FPGA driver"
 	depends on FPGA_XILINX

drivers/fpga/Makefile

@@ -6,6 +6,7 @@
 obj-y += fpga.o
 obj-$(CONFIG_FPGA_SPARTAN2) += spartan2.o
 obj-$(CONFIG_FPGA_SPARTAN3) += spartan3.o
+obj-$(CONFIG_FPGA_VERSALPL) += versalpl.o
 obj-$(CONFIG_FPGA_VIRTEX2) += virtex2.o
 obj-$(CONFIG_FPGA_ZYNQPL) += zynqpl.o
 obj-$(CONFIG_FPGA_ZYNQMPPL) += zynqmppl.o

drivers/fpga/versalpl.c

@@ -0,0 +1,51 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * (C) Copyright 2019, Xilinx, Inc,
+ * Siva Durga Prasad Paladugu <siva.durga.paladugu@xilinx.com>
+ */
+
+#include <common.h>
+#include <asm/arch/sys_proto.h>
+#include <memalign.h>
+#include <versalpl.h>
+
+static ulong versal_align_dma_buffer(ulong *buf, u32 len)
+{
+	ulong *new_buf;
+
+	if ((ulong)buf != ALIGN((ulong)buf, ARCH_DMA_MINALIGN)) {
+		new_buf = (ulong *)ALIGN((ulong)buf, ARCH_DMA_MINALIGN);
+		memcpy(new_buf, buf, len);
+		buf = new_buf;
+	}
+
+	return (ulong)buf;
+}
+
+static int versal_load(xilinx_desc *desc, const void *buf, size_t bsize,
+		       bitstream_type bstype)
+{
+	ulong bin_buf;
+	int ret;
+	u32 buf_lo, buf_hi;
+	u32 ret_payload[5];
+
+	bin_buf = versal_align_dma_buffer((ulong *)buf, bsize);
+
+	debug("%s called!\n", __func__);
+	flush_dcache_range(bin_buf, bin_buf + bsize);
+
+	buf_lo = lower_32_bits(bin_buf);
+	buf_hi = upper_32_bits(bin_buf);
+
+	ret = versal_pm_request(VERSAL_PM_LOAD_PDI, VERSAL_PM_PDI_TYPE, buf_lo,
+				buf_hi, 0, ret_payload);
+	if (ret)
+		puts("PL FPGA LOAD fail\n");
+
+	return ret;
+}
+
+struct xilinx_fpga_op versal_op = {
+	.load = versal_load,
+};

drivers/fpga/xilinx.c

@@ -226,7 +226,10 @@ int xilinx_info(xilinx_desc *desc)
 		case xilinx_zynqmp:
 			printf("ZynqMP PL\n");
 			break;
-			/* Add new family types here */
+		case xilinx_versal:
+			printf("Versal PL\n");
+			break;
+		/* Add new family types here */
 		default:
 			printf ("Unknown family type, %d\n", desc->family);
 		}
@@ -257,6 +260,9 @@ int xilinx_info(xilinx_desc *desc)
 		case csu_dma:
 			printf("csu_dma configuration interface (ZynqMP)\n");
 			break;
+		case cfi:
+			printf("CFI configuration interface (Versal)\n");
+			break;
 			/* Add new interface types here */
 		default:
 			printf ("Unsupported interface type, %d\n", desc->iface);

include/versalpl.h

@@ -0,0 +1,20 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * (C) Copyright 2019 Xilinx, Inc,
+ * Siva Durga Prasad Paladugu <siva.durga.paladugu@xilinx.com>
+ */
+
+#ifndef _VERSALPL_H_
+#define _VERSALPL_H_
+
+#include <xilinx.h>
+
+#define VERSAL_PM_LOAD_PDI	0x701
+#define VERSAL_PM_PDI_TYPE	0xF
+
+extern struct xilinx_fpga_op versal_op;
+
+#define XILINX_VERSAL_DESC \
+{ xilinx_versal, csu_dma, 1, &versal_op, 0, &versal_op }
+
+#endif /* _VERSALPL_H_ */

include/xilinx.h

@@ -21,6 +21,7 @@ typedef enum {			/* typedef xilinx_iface */
 	slave_selectmap,	/* slave SelectMap (virtex2)            */
 	devcfg,			/* devcfg interface (zynq) */
 	csu_dma,		/* csu_dma interface (zynqmp) */
+	cfi,			/* CFI interface(versal) */
 	max_xilinx_iface_type	/* insert all new types before this */
 } xilinx_iface;			/* end, typedef xilinx_iface */
 
@@ -32,6 +33,7 @@ typedef enum {			/* typedef xilinx_family */
 	xilinx_spartan3,	/* Spartan-III Family */
 	xilinx_zynq,		/* Zynq Family */
 	xilinx_zynqmp,		/* ZynqMP Family */
+	xilinx_versal,		/* Versal Family */
 	max_xilinx_type		/* insert all new types before this */
 } xilinx_family;		/* end, typedef xilinx_family */