ARM: keystone: cmd_ddr3: add ddr3 commands to test ddr

Add ddr3 commands:

test <start_addr in hex> <end_addr in hex> - test DDR from start\n
	address to end address\n
ddr compare <start_addr in hex> <end_addr in hex> <size in hex> -\n
	compare DDR data of (size) bytes from start address to end
	address\n
ddr ecc_err <addr in hex> <bit_err in hex> - generate bit errors\n
	in DDR data at <addr>, the command will read a 32-bit data\n
	from <addr>, and write (data ^ bit_err) back to <addr>\n

Delete CONFIG_MAX_UBOOT_MEM_SIZE, as it was supposed to be used
for ddr3 commands and for now it's not needed any more.

Signed-off-by: Hao Zhang <hzhang@ti.com>
Signed-off-by: Ivan Khoronzhuk <ivan.khoronzhuk@ti.com>

3 files changed, 249 insertions, 5 deletions

diff --git a/arch/arm/cpu/armv7/keystone/Makefile b/arch/arm/cpu/armv7/keystone/Makefile
index 57f6ea6..ed030db 100644
--- a/arch/arm/cpu/armv7/keystone/Makefile
+++ b/arch/arm/cpu/armv7/keystone/Makefile
@@ -14,5 +14,5 @@ obj-$(CONFIG_SOC_K2L) += clock-k2l.o
 obj-y	+= cmd_clock.o
 obj-y	+= cmd_mon.o
 obj-y	+= msmc.o
-obj-y	+= ddr3.o
+obj-y	+= ddr3.o cmd_ddr3.o
 obj-y	+= keystone.o
diff --git a/arch/arm/cpu/armv7/keystone/cmd_ddr3.c b/arch/arm/cpu/armv7/keystone/cmd_ddr3.c
new file mode 100644
index 0000000..ea78ad8
--- /dev/null
+++ b/arch/arm/cpu/armv7/keystone/cmd_ddr3.c
@@ -0,0 +1,248 @@
+/*
+ * Keystone2: DDR3 test commands
+ *
+ * (C) Copyright 2012-2014
+ *     Texas Instruments Incorporated, <www.ti.com>
+ *
+ * SPDX-License-Identifier:     GPL-2.0+
+ */
+
+#include <asm/arch/hardware.h>
+#include <asm/arch/ddr3.h>
+#include <common.h>
+#include <command.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+#define DDR_MIN_ADDR		CONFIG_SYS_SDRAM_BASE
+
+#define DDR_REMAP_ADDR		0x80000000
+#define ECC_START_ADDR1		((DDR_MIN_ADDR - DDR_REMAP_ADDR) >> 17)
+
+#define ECC_END_ADDR1		(((gd->start_addr_sp - DDR_REMAP_ADDR - \
+				 CONFIG_STACKSIZE) >> 17) - 2)
+
+#define DDR_TEST_BURST_SIZE	1024
+
+static int ddr_memory_test(u32 start_address, u32 end_address, int quick)
+{
+	u32 index_start, value, index;
+
+	index_start = start_address;
+
+	while (1) {
+		/* Write a pattern */
+		for (index = index_start;
+				index < index_start + DDR_TEST_BURST_SIZE;
+				index += 4)
+			__raw_writel(index, index);
+
+		/* Read and check the pattern */
+		for (index = index_start;
+				index < index_start + DDR_TEST_BURST_SIZE;
+				index += 4) {
+			value = __raw_readl(index);
+			if (value != index) {
+				printf("ddr_memory_test: Failed at address index = 0x%x value = 0x%x *(index) = 0x%x\n",
+				       index, value, __raw_readl(index));
+
+				return -1;
+			}
+		}
+
+		index_start += DDR_TEST_BURST_SIZE;
+		if (index_start >= end_address)
+			break;
+
+		if (quick)
+			continue;
+
+		/* Write a pattern for complementary values */
+		for (index = index_start;
+		     index < index_start + DDR_TEST_BURST_SIZE;
+		     index += 4)
+			__raw_writel((u32)~index, index);
+
+		/* Read and check the pattern */
+		for (index = index_start;
+		     index < index_start + DDR_TEST_BURST_SIZE;
+		     index += 4) {
+			value = __raw_readl(index);
+			if (value != ~index) {
+				printf("ddr_memory_test: Failed at address index = 0x%x value = 0x%x *(index) = 0x%x\n",
+				       index, value, __raw_readl(index));
+
+				return -1;
+			}
+		}
+
+		index_start += DDR_TEST_BURST_SIZE;
+		if (index_start >= end_address)
+			break;
+
+		/* Write a pattern */
+		for (index = index_start;
+		     index < index_start + DDR_TEST_BURST_SIZE;
+		     index += 2)
+			__raw_writew((u16)index, index);
+
+		/* Read and check the pattern */
+		for (index = index_start;
+		     index < index_start + DDR_TEST_BURST_SIZE;
+		     index += 2) {
+			value = __raw_readw(index);
+			if (value != (u16)index) {
+				printf("ddr_memory_test: Failed at address index = 0x%x value = 0x%x *(index) = 0x%x\n",
+				       index, value, __raw_readw(index));
+
+				return -1;
+			}
+		}
+
+		index_start += DDR_TEST_BURST_SIZE;
+		if (index_start >= end_address)
+			break;
+
+		/* Write a pattern */
+		for (index = index_start;
+		     index < index_start + DDR_TEST_BURST_SIZE;
+		     index += 1)
+			__raw_writeb((u8)index, index);
+
+		/* Read and check the pattern */
+		for (index = index_start;
+		     index < index_start + DDR_TEST_BURST_SIZE;
+		     index += 1) {
+			value = __raw_readb(index);
+			if (value != (u8)index) {
+				printf("ddr_memory_test: Failed at address index = 0x%x value = 0x%x *(index) = 0x%x\n",
+				       index, value, __raw_readb(index));
+
+				return -1;
+			}
+		}
+
+		index_start += DDR_TEST_BURST_SIZE;
+		if (index_start >= end_address)
+			break;
+	}
+
+	puts("ddr memory test PASSED!\n");
+	return 0;
+}
+
+static int ddr_memory_compare(u32 address1, u32 address2, u32 size)
+{
+	u32 index, value, index2, value2;
+
+	for (index = address1, index2 = address2;
+	     index < address1 + size;
+	     index += 4, index2 += 4) {
+		value = __raw_readl(index);
+		value2 = __raw_readl(index2);
+
+		if (value != value2) {
+			printf("ddr_memory_test: Compare failed at address = 0x%x value = 0x%x, address2 = 0x%x value2 = 0x%x\n",
+			       index, value, index2, value2);
+
+			return -1;
+		}
+	}
+
+	puts("ddr memory compare PASSED!\n");
+	return 0;
+}
+
+static int ddr_memory_ecc_err(u32 base, u32 address, u32 ecc_err)
+{
+	u32 value1, value2, value3;
+
+	puts("Disabling DDR ECC ...\n");
+	ddr3_disable_ecc(base);
+
+	value1 = __raw_readl(address);
+	value2 = value1 ^ ecc_err;
+	__raw_writel(value2, address);
+
+	value3 = __raw_readl(address);
+	printf("ECC err test, addr 0x%x, read data 0x%x, wrote data 0x%x, err pattern: 0x%x, read after write data 0x%x\n",
+	       address, value1, value2, ecc_err, value3);
+
+	__raw_writel(ECC_START_ADDR1 | (ECC_END_ADDR1 << 16),
+		     base + KS2_DDR3_ECC_ADDR_RANGE1_OFFSET);
+
+	puts("Enabling DDR ECC ...\n");
+	ddr3_enable_ecc(base, 1);
+
+	value1 = __raw_readl(address);
+	printf("ECC err test, addr 0x%x, read data 0x%x\n", address, value1);
+
+	ddr3_check_ecc_int(base);
+	return 0;
+}
+
+static int do_ddr_test(cmd_tbl_t *cmdtp,
+		       int flag, int argc, char * const argv[])
+{
+	u32 start_addr, end_addr, size, ecc_err;
+
+	if ((argc == 4) && (strncmp(argv[1], "ecc_err", 8) == 0)) {
+		if (!ddr3_ecc_support_rmw(KS2_DDR3A_EMIF_CTRL_BASE)) {
+			puts("ECC RMW isn't supported for this SOC\n");
+			return 1;
+		}
+
+		start_addr = simple_strtoul(argv[2], NULL, 16);
+		ecc_err = simple_strtoul(argv[3], NULL, 16);
+
+		if ((start_addr < CONFIG_SYS_SDRAM_BASE) ||
+		    (start_addr > (CONFIG_SYS_SDRAM_BASE +
+		     CONFIG_MAX_RAM_BANK_SIZE - 1))) {
+			puts("Invalid address!\n");
+			return cmd_usage(cmdtp);
+		}
+
+		ddr_memory_ecc_err(KS2_DDR3A_EMIF_CTRL_BASE,
+				   start_addr, ecc_err);
+		return 0;
+	}
+
+	if (!(((argc == 4) && (strncmp(argv[1], "test", 5) == 0)) ||
+	      ((argc == 5) && (strncmp(argv[1], "compare", 8) == 0))))
+		return cmd_usage(cmdtp);
+
+	start_addr = simple_strtoul(argv[2], NULL, 16);
+	end_addr = simple_strtoul(argv[3], NULL, 16);
+
+	if ((start_addr < CONFIG_SYS_SDRAM_BASE) ||
+	    (start_addr > (CONFIG_SYS_SDRAM_BASE +
+	     CONFIG_MAX_RAM_BANK_SIZE - 1)) ||
+	    (end_addr < CONFIG_SYS_SDRAM_BASE) ||
+	    (end_addr > (CONFIG_SYS_SDRAM_BASE +
+	     CONFIG_MAX_RAM_BANK_SIZE - 1)) || (start_addr >= end_addr)) {
+		puts("Invalid start or end address!\n");
+		return cmd_usage(cmdtp);
+	}
+
+	puts("Please wait ...\n");
+	if (argc == 5) {
+		size = simple_strtoul(argv[4], NULL, 16);
+		ddr_memory_compare(start_addr, end_addr, size);
+	} else {
+		ddr_memory_test(start_addr, end_addr, 0);
+	}
+
+	return 0;
+}
+
+U_BOOT_CMD(ddr,	5, 1, do_ddr_test,
+	   "DDR3 test",
+	   "test <start_addr in hex> <end_addr in hex> - test DDR from start\n"
+	   "	address to end address\n"
+	   "ddr compare <start_addr in hex> <end_addr in hex> <size in hex> -\n"
+	   "	compare DDR data of (size) bytes from start address to end\n"
+	   "	address\n"
+	   "ddr ecc_err <addr in hex> <bit_err in hex> - generate bit errors\n"
+	   "	in DDR data at <addr>, the command will read a 32-bit data\n"
+	   "	from <addr>, and write (data ^ bit_err) back to <addr>\n"
+);
diff --git a/include/configs/ks2_evm.h b/include/configs/ks2_evm.h
index 7c6392a..5dae409 100644
--- a/include/configs/ks2_evm.h
+++ b/include/configs/ks2_evm.h
@@ -319,8 +319,4 @@
 #include <asm/arch/clock.h>
 #define CONFIG_SYS_HZ_CLOCK		clk_get_rate(KS2_CLK1_6)
 
-/* Maximum memory size for relocated U-boot at the end of the DDR3 memory
-   which is NOT applicable for DDR ECC test */
-#define CONFIG_MAX_UBOOT_MEM_SIZE	(4 << 20)	/* 4 MiB */
-
 #endif /* __CONFIG_KS2_EVM_H */