[PATCH] drivers: fpga: Add FPGA configuration during bootm for Intel SOCFPGA

[Jit Loon Lim]

From: Yau Wai Gan <yau.wai.gan at intel.com>

This enable the capability to automatically perform FPGA
configuration when booting Linux FIT image via bootm command.
The FPGA configuration bitstream shall be packed within the
FIT image.

Signed-off-by: Yau Wai Gan <yau.wai.gan at intel.com>
Signed-off-by: Jit Loon Lim <jit.loon.lim at intel.com>
---
 drivers/fpga/altera.c | 41 +++++++++++++++++++++++++++++++++++++++++
 1 file changed, 41 insertions(+)

diff --git a/drivers/fpga/altera.c b/drivers/fpga/altera.c
index 10c0475d25..35eb95544d 100644
--- a/drivers/fpga/altera.c
+++ b/drivers/fpga/altera.c
@@ -10,6 +10,10 @@
 /*
  *  Altera FPGA support
  */
+#if IS_ENABLED(CONFIG_TARGET_SOCFPGA_AGILEX) || \
+	IS_ENABLED(CONFIG_TARGET_SOCFPGA_STRATIX10)
+#include <asm/arch/misc.h>
+#endif
 #include <common.h>
 #include <errno.h>
 #include <ACEX1K.h>
@@ -49,6 +53,43 @@ static const struct altera_fpga {
 #endif
 };
 
+#if IS_ENABLED(CONFIG_TARGET_SOCFPGA_AGILEX) || \
+	IS_ENABLED(CONFIG_TARGET_SOCFPGA_STRATIX10)
+int fpga_is_partial_data(int devnum, size_t img_len)
+{
+	/*
+	 * The FPGA data (full or partial) is checked by
+	 * the SDM hardware, for Intel SDM Mailbox based
+	 * devices. Hence always return full bitstream.
+	 *
+	 * For Cyclone V and Arria 10 family, the bitstream
+	 * type paramater is not handled by the driver.
+	 */
+	return 0;
+}
+
+int fpga_loadbitstream(int devnum, char *fpgadata, size_t size,
+		       bitstream_type bstype)
+{
+	int ret_val;
+	int flags = 0;
+
+	ret_val = fpga_load(devnum, (void *)fpgadata, size, bstype, flags);
+
+	/*
+	 * Enable the HPS to FPGA bridges when FPGA load is completed
+	 * successfully. This is to ensure the FPGA is accessible
+	 * by the HPS.
+	 */
+	if (!ret_val) {
+		printf("Enable FPGA bridges\n");
+		do_bridge_reset(1, ~0);
+	}
+
+	return ret_val;
+}
+#endif
+
 static int altera_validate(Altera_desc *desc, const char *fn)
 {
 	if (!desc) {
-- 
2.26.2