Merge with port of MPC8349EMDS board

1 files changed, 602 insertions, 0 deletions

diff --git a/board/mpc8349emds/mpc8349emds.c b/board/mpc8349emds/mpc8349emds.c
new file mode 100644
index 0000000..73a33f6
--- /dev/null
+++ b/board/mpc8349emds/mpc8349emds.c
@@ -0,0 +1,602 @@
+/*
+ * (C) Copyright 2006
+ * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ *
+ */
+
+#include <common.h>
+#include <ioports.h>
+#include <mpc83xx.h>
+#include <asm/mpc8349_pci.h>
+#include <i2c.h>
+#include <spd.h>
+#include <miiphy.h>
+#include <command.h>
+#if defined(CONFIG_PCI)
+#include <pci.h>
+#endif
+#if defined(CONFIG_SPD_EEPROM)
+#include <spd_sdram.h>
+#endif
+int fixed_sdram(void);
+void sdram_init(void);
+
+#if defined(CONFIG_DDR_ECC) && defined(CONFIG_MPC83XX)
+void ddr_enable_ecc(unsigned int dram_size);
+#endif
+
+int board_early_init_f (void)
+{
+	volatile u8* bcsr = (volatile u8*)CFG_BCSR;
+
+	/* Enable flash write */
+	bcsr[1] &= ~0x01;
+
+	return 0;
+}
+
+#define ns2clk(ns) (ns / (1000000000 / CONFIG_8349_CLKIN) + 1)
+
+long int initdram (int board_type)
+{
+	volatile immap_t *im = (immap_t *)CFG_IMMRBAR;
+	u32 msize = 0;
+
+	if ((im->sysconf.immrbar & IMMRBAR_BASE_ADDR) != (u32)im)
+		return -1;
+
+	puts("Initializing\n");
+
+	/* DDR SDRAM - Main SODIMM */
+	im->sysconf.ddrlaw[0].bar = CFG_DDR_BASE & LAWBAR_BAR;
+#if defined(CONFIG_SPD_EEPROM)
+	msize = spd_sdram();
+#else
+	msize = fixed_sdram();
+#endif
+	/*
+	 * Initialize SDRAM if it is on local bus.
+	 */
+	sdram_init();
+
+#if defined(CONFIG_DDR_ECC) && !defined(CONFIG_ECC_INIT_VIA_DDRCONTROLLER)
+	/*
+	 * Initialize and enable DDR ECC.
+	 */
+	ddr_enable_ecc(msize * 1024 * 1024);
+#endif
+	puts("   DDR RAM: ");
+	/* return total bus SDRAM size(bytes)  -- DDR */
+	return (msize * 1024 * 1024);
+}
+
+#if !defined(CONFIG_SPD_EEPROM)
+/*************************************************************************
+ *  fixed sdram init -- doesn't use serial presence detect.
+ ************************************************************************/
+int fixed_sdram(void)
+{
+	volatile immap_t *im = (immap_t *)CFG_IMMRBAR;
+	u32 msize = 0;
+	u32 ddr_size;
+	u32 ddr_size_log2;
+
+	msize = CFG_DDR_SIZE;
+	for (ddr_size = msize << 20, ddr_size_log2 = 0;
+	     (ddr_size > 1);
+	     ddr_size = ddr_size>>1, ddr_size_log2++) {
+		if (ddr_size & 1) {
+			return -1;
+		}
+	}
+	im->sysconf.ddrlaw[0].bar = ((CFG_DDR_SDRAM_BASE>>12) & 0xfffff);
+	im->sysconf.ddrlaw[0].ar = LAWAR_EN | ((ddr_size_log2 - 1) & LAWAR_SIZE);
+
+#if (CFG_DDR_SIZE != 256)
+#warning Currenly any ddr size other than 256 is not supported
+#endif
+	im->ddr.csbnds[2].csbnds = 0x0000000f;
+	im->ddr.cs_config[2] = CFG_DDR_CONFIG;
+
+	/* currently we use only one CS, so disable the other banks */ 
+	im->ddr.cs_config[0] = 0;
+	im->ddr.cs_config[1] = 0;
+	im->ddr.cs_config[3] = 0;
+
+	im->ddr.timing_cfg_1 = CFG_DDR_TIMING_1;
+	im->ddr.timing_cfg_2 = CFG_DDR_TIMING_2;
+	
+	im->ddr.sdram_cfg =
+		SDRAM_CFG_SREN
+#if defined(CONFIG_DDR_2T_TIMING)
+		| SDRAM_CFG_2T_EN
+#endif
+		| 2 << SDRAM_CFG_SDRAM_TYPE_SHIFT;
+#if defined (CONFIG_DDR_32BIT)
+	/* for 32-bit mode burst length is 8 */
+	im->ddr.sdram_cfg |= (SDRAM_CFG_32_BE | SDRAM_CFG_8_BE);
+#endif
+	im->ddr.sdram_mode = CFG_DDR_MODE;
+
+	im->ddr.sdram_interval = CFG_DDR_INTERVAL; 
+	udelay(200);
+
+	/* enable DDR controller */
+	im->ddr.sdram_cfg |= SDRAM_CFG_MEM_EN;
+	return msize;
+}
+#endif/*!CFG_SPD_EEPROM*/
+
+
+int checkboard (void)
+{
+	puts("Board: Freescale MPC8349EMDS\n");
+	return 0;
+}
+
+#if defined(CONFIG_PCI)
+/*
+ * Initialize PCI Devices, report devices found
+ */
+#ifndef CONFIG_PCI_PNP
+static struct pci_config_table pci_mpc8349emds_config_table[] = {
+	{PCI_ANY_ID,PCI_ANY_ID,PCI_ANY_ID,PCI_ANY_ID,
+	pci_cfgfunc_config_device, {PCI_ENET0_IOADDR,
+				    PCI_ENET0_MEMADDR,
+				    PCI_COMMON_MEMORY | PCI_COMMAND_MASTER
+	} },
+	{}
+}
+#endif
+
+volatile static struct pci_controller hose[] = {
+	{
+#ifndef CONFIG_PCI_PNP
+	config_table:pci_mpc8349emds_config_table,
+#endif
+	},
+	{
+#ifndef CONFIG_PCI_PNP
+	config_table:pci_mpc8349emds_config_table,
+#endif
+	}
+};
+#endif /* CONFIG_PCI */
+
+void pci_init_board(void)
+{
+#ifdef CONFIG_PCI
+	extern void pci_mpc83xx_init(volatile struct pci_controller *hose);
+
+	pci_mpc83xx_init(hose);
+#endif /* CONFIG_PCI */
+}
+
+/*
+ * if MPC8349EMDS is soldered with SDRAM
+ */
+#if defined(CFG_BR2_PRELIM)  \
+	&& defined(CFG_OR2_PRELIM) \
+	&& defined(CFG_LBLAWBAR2_PRELIM) \
+	&& defined(CFG_LBLAWAR2_PRELIM)
+/*
+ * Initialize SDRAM memory on the Local Bus.
+ */
+
+void sdram_init(void)
+{
+	volatile immap_t *immap = (immap_t *)CFG_IMMRBAR;
+	volatile lbus8349_t *lbc= &immap->lbus;
+	uint *sdram_addr = (uint *)CFG_LBC_SDRAM_BASE;
+
+	puts("\n   SDRAM on Local Bus: ");
+	print_size (CFG_LBC_SDRAM_SIZE * 1024 * 1024, "\n");
+
+	/*
+	 * Setup SDRAM Base and Option Registers, already done in cpu_init.c
+	 */
+
+	/* setup mtrpt, lsrt and lbcr for LB bus */
+	lbc->lbcr = CFG_LBC_LBCR;
+	lbc->mrtpr = CFG_LBC_MRTPR;
+	lbc->lsrt = CFG_LBC_LSRT;
+	asm("sync");
+
+	/*
+	 * Configure the SDRAM controller Machine Mode Register.
+	 */
+	lbc->lsdmr = CFG_LBC_LSDMR_5; /* 0x40636733; normal operation */
+
+	lbc->lsdmr = CFG_LBC_LSDMR_1; /* 0x68636733; precharge all the banks */
+	asm("sync");
+	*sdram_addr = 0xff;
+	udelay(100);
+
+	lbc->lsdmr = CFG_LBC_LSDMR_2; /* 0x48636733; auto refresh */
+	asm("sync");
+	/*1 times*/
+	*sdram_addr = 0xff;
+	udelay(100);
+	/*2 times*/
+	*sdram_addr = 0xff;
+	udelay(100);
+	/*3 times*/
+	*sdram_addr = 0xff;
+	udelay(100);
+	/*4 times*/
+	*sdram_addr = 0xff;
+	udelay(100);
+	/*5 times*/
+	*sdram_addr = 0xff;
+	udelay(100);
+	/*6 times*/
+	*sdram_addr = 0xff;
+	udelay(100);
+	/*7 times*/
+	*sdram_addr = 0xff;
+	udelay(100);
+	/*8 times*/
+	*sdram_addr = 0xff;
+	udelay(100);
+
+	/* 0x58636733; mode register write operation */
+	lbc->lsdmr = CFG_LBC_LSDMR_4;
+	asm("sync");
+	*sdram_addr = 0xff;
+	udelay(100);
+
+	lbc->lsdmr = CFG_LBC_LSDMR_5; /* 0x40636733; normal operation */
+	asm("sync");
+	*sdram_addr = 0xff;
+	udelay(100);
+}
+#else
+void sdram_init(void)
+{
+	put("SDRAM on Local Bus is NOT available!\n");
+}
+#endif
+
+#if defined(CONFIG_DDR_ECC) && defined(CONFIG_DDR_ECC_CMD)
+/*
+ * ECC user commands
+ */
+void ecc_print_status(void)
+{
+	volatile immap_t *immap = (immap_t *)CFG_IMMRBAR;
+	volatile ddr8349_t *ddr = &immap->ddr;
+
+	printf("\nECC mode: %s\n\n", (ddr->sdram_cfg & SDRAM_CFG_ECC_EN) ? "ON" : "OFF");
+
+	/* Interrupts */
+	printf("Memory Error Interrupt Enable:\n");
+	printf("  Multiple-Bit Error Interrupt Enable: %d\n",
+			(ddr->err_int_en & ECC_ERR_INT_EN_MBEE) ? 1 : 0);
+	printf("  Single-Bit Error Interrupt Enable: %d\n",
+			(ddr->err_int_en & ECC_ERR_INT_EN_SBEE) ? 1 : 0);
+	printf("  Memory Select Error Interrupt Enable: %d\n\n",
+			(ddr->err_int_en & ECC_ERR_INT_EN_MSEE) ? 1 : 0);
+
+	/* Error disable */
+	printf("Memory Error Disable:\n");
+	printf("  Multiple-Bit Error Disable: %d\n",
+			(ddr->err_disable & ECC_ERROR_DISABLE_MBED) ? 1 : 0);
+	printf("  Sinle-Bit Error Disable: %d\n",
+			(ddr->err_disable & ECC_ERROR_DISABLE_SBED) ? 1 : 0);
+	printf("  Memory Select Error Disable: %d\n\n",
+			(ddr->err_disable & ECC_ERROR_DISABLE_MSED) ? 1 : 0);
+
+	/* Error injection */
+	printf("Memory Data Path Error Injection Mask High/Low: %08lx %08lx\n",
+			ddr->data_err_inject_hi, ddr->data_err_inject_lo);
+
+	printf("Memory Data Path Error Injection Mask ECC:\n");
+	printf("  ECC Mirror Byte: %d\n",
+			(ddr->ecc_err_inject & ECC_ERR_INJECT_EMB) ? 1 : 0);
+	printf("  ECC Injection Enable: %d\n",
+			(ddr->ecc_err_inject & ECC_ERR_INJECT_EIEN) ? 1 : 0);
+	printf("  ECC Error Injection Mask: 0x%02x\n\n",
+			ddr->ecc_err_inject & ECC_ERR_INJECT_EEIM);
+
+	/* SBE counter/threshold */
+	printf("Memory Single-Bit Error Management (0..255):\n");
+	printf("  Single-Bit Error Threshold: %d\n",
+			(ddr->err_sbe & ECC_ERROR_MAN_SBET) >> ECC_ERROR_MAN_SBET_SHIFT);
+	printf("  Single-Bit Error Counter: %d\n\n",
+			(ddr->err_sbe & ECC_ERROR_MAN_SBEC) >> ECC_ERROR_MAN_SBEC_SHIFT);
+
+	/* Error detect */
+	printf("Memory Error Detect:\n");
+	printf("  Multiple Memory Errors: %d\n",
+			(ddr->err_detect & ECC_ERROR_DETECT_MME) ? 1 : 0);
+	printf("  Multiple-Bit Error: %d\n",
+			(ddr->err_detect & ECC_ERROR_DETECT_MBE) ? 1 : 0);
+	printf("  Single-Bit Error: %d\n",
+			(ddr->err_detect & ECC_ERROR_DETECT_SBE) ? 1 : 0);
+	printf("  Memory Select Error: %d\n\n",
+			(ddr->err_detect & ECC_ERROR_DETECT_MSE) ? 1 : 0);
+
+	/* Capture data */
+	printf("Memory Error Address Capture: 0x%08lx\n", ddr->capture_address);
+	printf("Memory Data Path Read Capture High/Low: %08lx %08lx\n",
+			ddr->capture_data_hi, ddr->capture_data_lo);
+	printf("Memory Data Path Read Capture ECC: 0x%02x\n\n",
+		ddr->capture_ecc & CAPTURE_ECC_ECE);
+
+	printf("Memory Error Attributes Capture:\n");
+	printf("  Data Beat Number: %d\n",
+			(ddr->capture_attributes & ECC_CAPT_ATTR_BNUM) >> ECC_CAPT_ATTR_BNUM_SHIFT);
+	printf("  Transaction Size: %d\n",
+			(ddr->capture_attributes & ECC_CAPT_ATTR_TSIZ) >> ECC_CAPT_ATTR_TSIZ_SHIFT);
+	printf("  Transaction Source: %d\n",
+			(ddr->capture_attributes & ECC_CAPT_ATTR_TSRC) >> ECC_CAPT_ATTR_TSRC_SHIFT);
+	printf("  Transaction Type: %d\n",
+			(ddr->capture_attributes & ECC_CAPT_ATTR_TTYP) >> ECC_CAPT_ATTR_TTYP_SHIFT);
+	printf("  Error Information Valid: %d\n\n",
+			ddr->capture_attributes & ECC_CAPT_ATTR_VLD);
+}
+
+int do_ecc ( cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
+{
+	volatile immap_t *immap = (immap_t *)CFG_IMMRBAR;
+	volatile ddr8349_t *ddr = &immap->ddr;
+	volatile u32 val;
+	u64 *addr, count, val64;
+	register u64 *i;
+	
+	if (argc > 4) {
+		printf ("Usage:\n%s\n", cmdtp->usage);
+		return 1;
+	}
+	
+	if (argc == 2) {
+		if (strcmp(argv[1], "status") == 0) {
+			ecc_print_status();
+			return 0;
+		} else if (strcmp(argv[1], "captureclear") == 0) {
+			ddr->capture_address = 0;
+			ddr->capture_data_hi = 0;
+			ddr->capture_data_lo = 0;
+			ddr->capture_ecc = 0;
+			ddr->capture_attributes = 0;
+			return 0;
+		}
+	} 
+	
+	if (argc == 3) {
+		if (strcmp(argv[1], "sbecnt") == 0) {
+			val = simple_strtoul(argv[2], NULL, 10);
+			if (val > 255) {
+				printf("Incorrect Counter value, should be 0..255\n");
+				return 1;
+			}
+
+			val = (val << ECC_ERROR_MAN_SBEC_SHIFT);
+			val |= (ddr->err_sbe & ECC_ERROR_MAN_SBET);
+
+			ddr->err_sbe = val;
+			return 0;
+		} else if (strcmp(argv[1], "sbethr") == 0) {
+			val = simple_strtoul(argv[2], NULL, 10);
+			if (val > 255) {
+				printf("Incorrect Counter value, should be 0..255\n");
+				return 1;
+			}
+
+			val = (val << ECC_ERROR_MAN_SBET_SHIFT);
+			val |= (ddr->err_sbe & ECC_ERROR_MAN_SBEC);
+
+			ddr->err_sbe = val;
+			return 0;
+		} else if (strcmp(argv[1], "errdisable") == 0) {
+			val = ddr->err_disable;
+
+			if (strcmp(argv[2], "+sbe") == 0) {
+				val |= ECC_ERROR_DISABLE_SBED;
+			} else if (strcmp(argv[2], "+mbe") == 0) {
+				val |= ECC_ERROR_DISABLE_MBED;
+			} else if (strcmp(argv[2], "+mse") == 0) {
+				val |= ECC_ERROR_DISABLE_MSED;
+			} else if (strcmp(argv[2], "+all") == 0) {
+				val |= (ECC_ERROR_DISABLE_SBED | 
+					ECC_ERROR_DISABLE_MBED | 
+					ECC_ERROR_DISABLE_MSED);
+			} else if (strcmp(argv[2], "-sbe") == 0) {
+				val &= ~ECC_ERROR_DISABLE_SBED;
+			} else if (strcmp(argv[2], "-mbe") == 0) {
+				val &= ~ECC_ERROR_DISABLE_MBED;
+			} else if (strcmp(argv[2], "-mse") == 0) {
+				val &= ~ECC_ERROR_DISABLE_MSED;
+			} else if (strcmp(argv[2], "-all") == 0) {
+				val &= ~(ECC_ERROR_DISABLE_SBED | 
+					ECC_ERROR_DISABLE_MBED | 
+					ECC_ERROR_DISABLE_MSED);
+			} else {
+				printf("Incorrect err_disable field\n");
+				return 1;
+			}
+
+			ddr->err_disable = val;
+			__asm__ __volatile__ ("sync");
+			__asm__ __volatile__ ("isync");
+			return 0;
+		} else if (strcmp(argv[1], "errdetectclr") == 0) {
+			val = ddr->err_detect;
+
+			if (strcmp(argv[2], "mme") == 0) {
+				val |= ECC_ERROR_DETECT_MME;
+			} else if (strcmp(argv[2], "sbe") == 0) {
+				val |= ECC_ERROR_DETECT_SBE;
+			} else if (strcmp(argv[2], "mbe") == 0) {
+				val |= ECC_ERROR_DETECT_MBE;
+			} else if (strcmp(argv[2], "mse") == 0) {
+				val |= ECC_ERROR_DETECT_MSE;
+			} else if (strcmp(argv[2], "all") == 0) {
+				val |= (ECC_ERROR_DETECT_MME |
+					ECC_ERROR_DETECT_MBE |
+					ECC_ERROR_DETECT_SBE |
+					ECC_ERROR_DETECT_MSE);
+			} else {
+				printf("Incorrect err_detect field\n");
+				return 1;
+			}
+
+			ddr->err_detect = val;
+			return 0;
+		} else if (strcmp(argv[1], "injectdatahi") == 0) {
+			val = simple_strtoul(argv[2], NULL, 16);
+
+			ddr->data_err_inject_hi = val;
+			return 0;
+		} else if (strcmp(argv[1], "injectdatalo") == 0) {
+			val = simple_strtoul(argv[2], NULL, 16);
+
+			ddr->data_err_inject_lo = val;
+			return 0;
+		} else if (strcmp(argv[1], "injectecc") == 0) {
+			val = simple_strtoul(argv[2], NULL, 16);
+			if (val > 0xff) {
+				printf("Incorrect ECC inject mask, should be 0x00..0xff\n");
+				return 1;
+			}
+			val |= (ddr->ecc_err_inject & ~ECC_ERR_INJECT_EEIM);
+
+			ddr->ecc_err_inject = val;
+			return 0;
+		} else if (strcmp(argv[1], "inject") == 0) {
+			val = ddr->ecc_err_inject;
+
+			if (strcmp(argv[2], "en") == 0)
+				val |= ECC_ERR_INJECT_EIEN;
+			else if (strcmp(argv[2], "dis") == 0)
+				val &= ~ECC_ERR_INJECT_EIEN;
+			else
+				printf("Incorrect command\n");
+
+			ddr->ecc_err_inject = val;
+			__asm__ __volatile__ ("sync");
+			__asm__ __volatile__ ("isync");
+			return 0;
+		} else if (strcmp(argv[1], "mirror") == 0) {
+			val = ddr->ecc_err_inject;
+
+			if (strcmp(argv[2], "en") == 0)
+				val |= ECC_ERR_INJECT_EMB;
+			else if (strcmp(argv[2], "dis") == 0)
+				val &= ~ECC_ERR_INJECT_EMB;
+			else
+				printf("Incorrect command\n");
+
+			ddr->ecc_err_inject = val;
+			return 0;
+		}
+	}
+
+	if (argc == 4) {
+		if (strcmp(argv[1], "test") == 0) {
+			addr = (u64 *)simple_strtoul(argv[2], NULL, 16);
+			count = simple_strtoul(argv[3], NULL, 16);
+
+			if ((u32)addr % 8) {
+				printf("Address not alligned on double word boundary\n");
+				return 1;
+			}
+
+			disable_interrupts();
+			icache_disable();
+
+			for (i = addr; i < addr + count; i++) {
+				/* enable injects */
+				ddr->ecc_err_inject |= ECC_ERR_INJECT_EIEN;
+				__asm__ __volatile__ ("sync");
+				__asm__ __volatile__ ("isync");
+
+				/* write memory location injecting errors */
+				*i = 0x1122334455667788ULL;
+				__asm__ __volatile__ ("sync");
+
+				/* disable injects */
+				ddr->ecc_err_inject &= ~ECC_ERR_INJECT_EIEN;
+				__asm__ __volatile__ ("sync");
+				__asm__ __volatile__ ("isync");
+
+				/* read data, this generates ECC error */
+				val64 = *i;
+				__asm__ __volatile__ ("sync");
+
+				/* disable errors for ECC */
+				ddr->err_disable |= ~ECC_ERROR_ENABLE;
+				__asm__ __volatile__ ("sync");
+				__asm__ __volatile__ ("isync");
+
+				/* re-initialize memory, write the location again
+				 * NOT injecting errors this time */
+				*i = 0xcafecafecafecafeULL;
+				__asm__ __volatile__ ("sync");
+
+				/* enable errors for ECC */
+				ddr->err_disable &= ECC_ERROR_ENABLE;
+				__asm__ __volatile__ ("sync");
+				__asm__ __volatile__ ("isync");
+			}
+
+			icache_enable();
+			enable_interrupts();
+
+			return 0;
+		}
+	}
+
+	printf ("Usage:\n%s\n", cmdtp->usage);
+	return 1;
+}
+
+U_BOOT_CMD(
+	ecc,     4,     0,      do_ecc,
+	"ecc     - support for DDR ECC features\n",
+	"status              - print out status info\n"
+	"ecc captureclear        - clear capture regs data\n"
+	"ecc sbecnt <val>        - set Single-Bit Error counter\n"
+	"ecc sbethr <val>        - set Single-Bit Threshold\n"
+	"ecc errdisable <flag>   - clear/set disable Memory Error Disable, flag:\n"
+	"  [-|+]sbe - Single-Bit Error\n"
+	"  [-|+]mbe - Multiple-Bit Error\n"
+	"  [-|+]mse - Memory Select Error\n"
+	"  [-|+]all - all errors\n"
+	"ecc errdetectclr <flag> - clear Memory Error Detect, flag:\n"
+	"  mme - Multiple Memory Errors\n"
+	"  sbe - Single-Bit Error\n"
+	"  mbe - Multiple-Bit Error\n"
+	"  mse - Memory Select Error\n"
+	"  all - all errors\n"
+	"ecc injectdatahi <hi>  - set Memory Data Path Error Injection Mask High\n"
+	"ecc injectdatalo <lo>  - set Memory Data Path Error Injection Mask Low\n"
+	"ecc injectecc <ecc>    - set ECC Error Injection Mask\n"
+	"ecc inject <en|dis>    - enable/disable error injection\n"
+	"ecc mirror <en|dis>    - enable/disable mirror byte\n"
+	"ecc test <addr> <cnt>  - test mem region:\n"
+	"  - enables injects\n"
+	"  - writes pattern injecting errors\n"
+	"  - disables injects\n"
+	"  - reads pattern back, generates error\n"
+	"  - re-inits memory"
+);
+#endif /* if defined(CONFIG_DDR_ECC) && defined(CONFIG_DDR_ECC_CMD) */