1 files changed, 147 insertions, 0 deletions
diff --git a/drivers/ram/rockchip/sdram_debug.c b/drivers/ram/rockchip/sdram_debug.c
new file mode 100644
index 0000000000..9cf662675b
--- /dev/null
+++ b/drivers/ram/rockchip/sdram_debug.c
@@ -0,0 +1,147 @@
+// SPDX-License-Identifier: (GPL-2.0+ OR MIT)
+/*
+ * (C) Copyright 2019 Rockchip Electronics Co., Ltd
+ * (C) Copyright 2019 Amarula Solutions.
+ * Author: Jagan Teki <jagan@amarulasolutions.com>
+ */
+
+#include <common.h>
+#include <debug_uart.h>
+#include <asm/arch-rockchip/sdram_common.h>
+
+void sdram_print_dram_type(unsigned char dramtype)
+{
+	switch (dramtype) {
+	case DDR3:
+		printascii("DDR3");
+		break;
+	case DDR4:
+		printascii("DDR4");
+		break;
+	case LPDDR2:
+		printascii("LPDDR2");
+		break;
+	case LPDDR3:
+		printascii("LPDDR3");
+		break;
+	case LPDDR4:
+		printascii("LPDDR4");
+		break;
+	default:
+		printascii("Unknown Device");
+		break;
+	}
+}
+
+/**
+ * cs  = 0, cs0
+ * cs  = 1, cs1
+ * cs => 2, cs0+cs1
+ * note: it didn't consider about row_3_4
+ */
+u64 sdram_get_cs_cap(struct sdram_cap_info *cap_info, u32 cs, u32 dram_type)
+{
+	u32 bg;
+	u64 cap[2];
+
+	if (dram_type == DDR4)
+		/* DDR4 8bit dram BG = 2(4bank groups),
+		 * 16bit dram BG = 1 (2 bank groups)
+		 */
+		bg = (cap_info->dbw == 0) ? 2 : 1;
+	else
+		bg = 0;
+
+	cap[0] = 1llu << (cap_info->bw + cap_info->col +
+		 bg + cap_info->bk + cap_info->cs0_row);
+
+	if (cap_info->rank == 2)
+		cap[1] = 1llu << (cap_info->bw + cap_info->col +
+			 bg + cap_info->bk + cap_info->cs1_row);
+	else
+		cap[1] = 0;
+
+	if (cs == 0)
+		return cap[0];
+	else if (cs == 1)
+		return cap[1];
+	else
+		return (cap[0] + cap[1]);
+}
+
+void sdram_print_ddr_info(struct sdram_cap_info *cap_info,
+			  struct sdram_base_params *base)
+{
+	u32 bg, cap;
+
+	bg = (cap_info->dbw == 0) ? 2 : 1;
+
+	sdram_print_dram_type(base->dramtype);
+
+	printascii(", ");
+	printdec(base->ddr_freq);
+	printascii("MHz\n");
+
+	printascii("BW=");
+	printdec(8 << cap_info->bw);
+
+	printascii(" Col=");
+	printdec(cap_info->col);
+
+	printascii(" Bk=");
+	printdec(0x1 << cap_info->bk);
+	if (base->dramtype == DDR4) {
+		printascii(" BG=");
+		printdec(1 << bg);
+	}
+
+	printascii(" CS0 Row=");
+	printdec(cap_info->cs0_row);
+	if (cap_info->rank > 1) {
+		printascii(" CS1 Row=");
+		printdec(cap_info->cs1_row);
+	}
+
+	printascii(" CS=");
+	printdec(cap_info->rank);
+
+	printascii(" Die BW=");
+	printdec(8 << cap_info->dbw);
+
+	cap = sdram_get_cs_cap(cap_info, 3, base->dramtype);
+	if (cap_info->row_3_4)
+		cap = cap * 3 / 4;
+
+	printascii(" Size=");
+	printdec(cap >> 20);
+	printascii("MB\n");
+}
+
+void sdram_print_stride(unsigned int stride)
+{
+	switch (stride) {
+	case 0xc:
+		printf("128B stride\n");
+		break;
+	case 5:
+	case 9:
+	case 0xd:
+	case 0x11:
+	case 0x19:
+		printf("256B stride\n");
+		break;
+	case 0xa:
+	case 0xe:
+	case 0x12:
+		printf("512B stride\n");
+		break;
+	case 0xf:
+		printf("4K stride\n");
+		break;
+	case 0x1f:
+		printf("32MB + 256B stride\n");
+		break;
+	default:
+		printf("no stride\n");
+	}
+}