[U-Boot] [PATCH 2/2] ARM64: zynqmp: Add support for chip ID detection

[Michal Simek]

Chip ID needs to be known for loading bitstream because
U-Boot checks ID from bitstream header in BIT format.
BIN format is completely unchecked.

The chipid is get from ATF via SMC.

Signed-off-by: Siva Durga Prasad Paladugu <sivadur at xilinx.com>
Signed-off-by: Michal Simek <michal.simek at xilinx.com>
---

 board/xilinx/zynqmp/zynqmp.c | 99 ++++++++++++++++++++++++++++++++++++++++++++
 include/zynqmppl.h           |  1 +
 2 files changed, 100 insertions(+)

diff --git a/board/xilinx/zynqmp/zynqmp.c b/board/xilinx/zynqmp/zynqmp.c
index df4fc901c1c7..566b5e8d2afa 100644
--- a/board/xilinx/zynqmp/zynqmp.c
+++ b/board/xilinx/zynqmp/zynqmp.c
@@ -16,15 +16,114 @@
 #include <asm/io.h>
 #include <usb.h>
 #include <dwc3-uboot.h>
+#include <zynqmppl.h>
 #include <i2c.h>
 #include <g_dnl.h>
 
 DECLARE_GLOBAL_DATA_PTR;
 
+#if defined(CONFIG_FPGA) && defined(CONFIG_FPGA_ZYNQMPPL) && \
+    !defined(CONFIG_SPL_BUILD)
+static xilinx_desc zynqmppl = XILINX_ZYNQMP_DESC;
+
+static const struct {
+	uint32_t id;
+	char *name;
+} zynqmp_devices[] = {
+	{
+		.id = 0x10,
+		.name = "3eg",
+	},
+	{
+		.id = 0x11,
+		.name = "2eg",
+	},
+	{
+		.id = 0x20,
+		.name = "5ev",
+	},
+	{
+		.id = 0x21,
+		.name = "4ev",
+	},
+	{
+		.id = 0x30,
+		.name = "7ev",
+	},
+	{
+		.id = 0x38,
+		.name = "9eg",
+	},
+	{
+		.id = 0x39,
+		.name = "6eg",
+	},
+	{
+		.id = 0x40,
+		.name = "11eg",
+	},
+	{
+		.id = 0x50,
+		.name = "15eg",
+	},
+	{
+		.id = 0x58,
+		.name = "19eg",
+	},
+	{
+		.id = 0x59,
+		.name = "17eg",
+	},
+};
+
+static int chip_id(void)
+{
+	struct pt_regs regs;
+	regs.regs[0] = ZYNQMP_SIP_SVC_CSU_DMA_CHIPID;
+	regs.regs[1] = 0;
+	regs.regs[2] = 0;
+	regs.regs[3] = 0;
+
+	smc_call(&regs);
+
+	return regs.regs[0];
+}
+
+static char *zynqmp_get_silicon_idcode_name(void)
+{
+	uint32_t i, id;
+
+	id = chip_id();
+	for (i = 0; i < ARRAY_SIZE(zynqmp_devices); i++) {
+		if (zynqmp_devices[i].id == id)
+			return zynqmp_devices[i].name;
+	}
+	return "unknown";
+}
+#endif
+
+#define ZYNQMP_VERSION_SIZE	9
+
 int board_init(void)
 {
 	printf("EL Level:\tEL%d\n", current_el());
 
+#if defined(CONFIG_FPGA) && defined(CONFIG_FPGA_ZYNQMPPL) && \
+    !defined(CONFIG_SPL_BUILD) || (defined(CONFIG_SPL_FPGA_SUPPORT) && \
+    defined(CONFIG_SPL_BUILD))
+	if (current_el() != 3) {
+		static char version[ZYNQMP_VERSION_SIZE];
+
+		strncat(version, "xczu", ZYNQMP_VERSION_SIZE);
+		zynqmppl.name = strncat(version,
+					zynqmp_get_silicon_idcode_name(),
+					ZYNQMP_VERSION_SIZE);
+		printf("Chip ID:\t%s\n", zynqmppl.name);
+		fpga_init();
+		fpga_add(fpga_xilinx, &zynqmppl);
+	}
+#endif
+
 	return 0;
 }
 
diff --git a/include/zynqmppl.h b/include/zynqmppl.h
index 002ee2aabbb8..542ace9a03b9 100644
--- a/include/zynqmppl.h
+++ b/include/zynqmppl.h
@@ -10,6 +10,7 @@
 
 #include <xilinx.h>
 
+#define ZYNQMP_SIP_SVC_CSU_DMA_CHIPID		0xC2000018
 #define ZYNQMP_SIP_SVC_PM_FPGA_LOAD		0xC2000016
 #define ZYNQMP_FPGA_OP_INIT			(1 << 0)
 #define ZYNQMP_FPGA_OP_LOAD			(1 << 1)
-- 
1.9.1