cpu/mpc512x/iim.c - uboot/qsr1000 - Git at Google

 /*
  * Copyright 2008 Silicon Turnkey Express, Inc.
  * Martha Marx <mmarx@silicontkx.com>
  *
  * ADS5121 IIM (Fusebox) Interface
  *
  * 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 <command.h>
 #include <asm/io.h>

 #ifdef CONFIG_CMD_FUSE

 DECLARE_GLOBAL_DATA_PTR;

 static char cur_bank = '1';

 char *iim_err_msg(u32 err)
 {
 	static char *IIM_errs[] = {
 		"Parity Error in cache",
 		"Explicit Sense Cycle Error",
 		"Write to Locked Register Error",
 		"Read Protect Error",
 		"Override Protect Error",
 		"Write Protect Error"};

 	int i;

 	if (!err)
 		return "";
 	for (i = 1; i < 8; i++)
 		if (err & (1 << i))
 			printf("IIM - %s\n", IIM_errs[i-1]);
 	return "";
 }

 int in_range(int n, int min, int max, char *err, char *usg)
 {
 	if (n > max || n < min) {
 		printf(err);
 		printf("Usage:\n%s\n", usg);
 		return 0;
 	}
 	return 1;
 }

 int ads5121_fuse_read(int bank, int fstart, int num)
 {
 	iim512x_t *iim = &((immap_t *) CONFIG_SYS_IMMR)->iim;
 	u32 *iim_fb, dummy;
 	int f, ctr;

 	out_be32(&iim->err, in_be32(&iim->err));
 	if (bank == 0)
 		iim_fb = (u32 *)&(iim->fbac0);
 	else
 		iim_fb = (u32 *)&(iim->fbac1);
 /* try a read to see if Read Protect is set */
 	dummy = in_be32(&iim_fb[0]);
 	if (in_be32(&iim->err) & IIM_ERR_RPE) {
 		printf("\tRead protect fuse is set\n");
 		out_be32(&iim->err, IIM_ERR_RPE);
 		return 0;
 	}
 	printf("Reading Bank %d cache\n", bank);
 	for (f = fstart, ctr = 0; num > 0; ctr++, num--, f++) {
 		if (ctr % 4 == 0)
 			printf("F%2d:", f);
 		printf("\t%#04x", (u8)(iim_fb[f]));
 		if (ctr % 4 == 3)
 			printf("\n");
 	}
 	if (ctr % 4 != 0)
 		printf("\n");
 }

 int ads5121_fuse_override(int bank, int f, u8 val)
 {
 	iim512x_t *iim = &((immap_t *) CONFIG_SYS_IMMR)->iim;
 	u32 *iim_fb;
 	u32 iim_stat;
 	int i;

 	out_be32(&iim->err, in_be32(&iim->err));
 	if (bank == 0)
 		iim_fb = (u32 *)&(iim->fbac0);
 	else
 		iim_fb = (u32 *)&(iim->fbac1);
 /* try a read to see if Read Protect is set */
 	iim_stat = in_be32(&iim_fb[0]);
 	if (in_be32(&iim->err) & IIM_ERR_RPE) {
 		printf("Read protect fuse is set on bank %d;"
 			"Override protect may also be set\n", bank);
 		printf("An attempt will be made to override\n");
 		out_be32(&iim->err, IIM_ERR_RPE);
 	}
 	if (iim_stat & IIM_FBAC_FBOP) {
 		printf("Override protect fuse is set on bank %d\n", bank);
 		return 1;
 	}
 	if (f > IIM_FMAX) /* reset the entire bank */
 		for (i = 0; i < IIM_FMAX + 1; i++)
 			out_be32(&iim_fb[i],  0);
 	else
 		out_be32(&iim_fb[f], val);
 	return 0;
 }

 int ads5121_fuse_prog(cmd_tbl_t *cmdtp, int bank, char *fuseno_bitno)
 {
 	iim512x_t *iim = &((immap_t *) CONFIG_SYS_IMMR)->iim;
 	int f, i, bitno;
 	u32 stat, err;

 	f = simple_strtol(fuseno_bitno, NULL, 10);
 	if (f == 0 && fuseno_bitno[0] != '0')
 		f = -1;
 	if (!in_range(f, 0, IIM_FMAX,
 		"<frow> must be between 0-31\n\n", cmdtp->usage))
 		return 1;
 	bitno = -1;
 	for (i = 0; i < 6; i++) {
 		if (fuseno_bitno[i] == '_') {
 			bitno = simple_strtol(&(fuseno_bitno[i+1]), NULL, 10);
 			if (bitno == 0 && fuseno_bitno[i+1] != '0')
 				bitno = -1;
 			break;
 		}
 	}
 	if (!in_range(bitno, 0, 7, "Bit number ranges from 0-7\n"
 		"Example of <frow_bitno>: \"18_4\" sets bit 4 of row 18\n",
 		cmdtp->usage))
 		return 1;
 	out_be32(&iim->err, in_be32(&iim->err));
 	out_be32(&iim->prg_p, IIM_PRG_P_SET);
 	out_be32(&iim->ua, IIM_SET_UA(bank, f));
 	out_be32(&iim->la, IIM_SET_LA(f, bitno));
 #ifdef DEBUG
 	printf("Programming disabled with DEBUG defined \n");
 	printf(""Set up to pro
 	printf("iim.ua = %x; iim.la = %x\n", iim->ua, iim->la);
 #else
 	out_be32(&iim->fctl, IIM_FCTL_PROG_PULSE | IIM_FCTL_PROG);
 	do
 		udelay(20);
 	while ((stat = in_be32(&iim->stat)) & IIM_STAT_BUSY);
 	out_be32(&iim->prg_p, 0);
 	err = in_be32(&iim->err);
 	if (stat & IIM_STAT_PRGD) {
 		if (!(err & (IIM_ERR_WPE | IIM_ERR_WPE))) {
 			printf("Fuse is successfully set");
 			if (err)
 				printf(" - however there are other errors");
 			printf("\n");
 		}
 		iim->stat = 0;
 	}
 	if (err) {
 		iim_err_msg(err);
 		out_be32(&iim->err, in_be32(&iim->err));
 	}
 #endif
 }

 int ads5121_fuse_sense(int bank, int fstart, int num)
 {
 	iim512x_t *iim = &((immap_t *) CONFIG_SYS_IMMR)->iim;
 	u32 iim_fbac;
 	u32 stat, err, err_hold = 0;
 	int f, ctr;

 	out_be32(&iim->err, in_be32(&iim->err));
 	if (bank == 0)
 		iim_fbac = in_be32(&iim->fbac0);
 	else
 		iim_fbac = in_be32(&iim->fbac1);
 	if (iim_fbac & IIM_FBAC_FBESP) {
 		printf("\tSense Protect disallows this operation\n");
 		out_be32(&iim->err, IIM_FBAC_FBESP);
 		return 1;
 	}
 	err = in_be32(&iim->err);
 	if (err) {
 		iim_err_msg(err);
 		err_hold |= err;
 	}
 	if (err & IIM_ERR_RPE)
 		printf("\tRead protect fuse is set; "
 			"Sense Protect may be set but will be attempted\n");
 	if (err)
 		out_be32(&iim->err, err);
 	printf("Sensing fuse(s) on Bank %d\n", bank);
 	for (f = fstart, ctr = 0; num > 0; ctr++, f++, num--) {
 		out_be32(&iim->ua, IIM_SET_UA(bank, f));
 		out_be32(&iim->la, IIM_SET_LA(f, 0));
 		out_be32(&iim->fctl,  IIM_FCTL_ESNS_N);
 		do
 			udelay(20);
 		while ((stat = in_be32(&iim->stat)) & IIM_STAT_BUSY);
 		err = in_be32(&iim->err);
 		if (err & IIM_ERR_SNSE) {
 			iim_err_msg(err);
 			out_be32(&iim->err, IIM_ERR_SNSE);
 			return 1;
 		}
 		if (stat & IIM_STAT_SNSD) {
 			out_be32(&iim->stat, 0);
 			if (ctr % 4 == 0)
 				printf("F%2d:", f);
 			printf("\t%#04x", (u8)iim->sdat);
 			if (ctr % 4 == 3)
 				printf("\n");
 		}
 		if (err) {
 			err_hold |= err;
 			out_be32(&iim->err, err);
 		}
 	}
 	if (ctr % 4 != 0)
 		printf("\n");
 	if (err_hold)
 		iim_err_msg(err_hold);

 	return 0;
 }

 int ads5121_fuse_stat(int bank)
 {
 	iim512x_t *iim = &((immap_t *) CONFIG_SYS_IMMR)->iim;
 	u32 iim_fbac;
 	u32 err;

 	out_be32(&iim->err, in_be32(&iim->err));
 	if (bank == 0)
 		iim_fbac = in_be32(&iim->fbac0);
 	else
 		iim_fbac = in_be32(&iim->fbac1);
 	err = in_be32(&iim->err);
 	if (err)
 		iim_err_msg(err);
 	if (err & IIM_ERR_RPE  || iim_fbac & IIM_FBAC_FBRP) {
 		if (iim_fbac == 0)
 			printf("Since protection settings can't be read - "
 				"try sensing fuse row 0;\n");
 		return 0;
 	}
 	if (iim_fbac & IIM_PROTECTION)
 		printf("Protection Fuses Bank %d = %#04x:\n", bank, iim_fbac);
 	else if (!(err & IIM_ERR_RPE))
 		printf("No Protection fuses are set\n");
 	if (iim_fbac & IIM_FBAC_FBWP)
 		printf("\tWrite Protect fuse is set\n");
 	if (iim_fbac & IIM_FBAC_FBOP)
 		printf("\tOverride Protect fuse is set\n");
 	if (iim_fbac & IIM_FBAC_FBESP)
 		printf("\tSense Protect Fuse is set\n");
 	out_be32(&iim->err, in_be32(&iim->err));

 	return 0;
 }

 int do_ads5121_fuse(cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
 {
 	int frow, n, v, bank;

 	if (cur_bank == '0')
 		bank = 0;
 	else
 		bank = 1;

 	switch (argc) {
 	case 0:
 	case 1:
 		printf("Usage:\n%s\n", cmdtp->usage);
 		return 1;
 	case 2:
 		if (strncmp(argv[1], "stat", 4) == 0)
 			return ads5121_fuse_stat(bank);
 		if (strncmp(argv[1], "read", 4) == 0)
 			return ads5121_fuse_read(bank, 0, IIM_FMAX + 1);
 		if (strncmp(argv[1], "sense", 5) == 0)
 			return ads5121_fuse_sense(bank, 0, IIM_FMAX + 1);
 		if (strncmp(argv[1], "ovride", 6) == 0)
 			return ads5121_fuse_override(bank, IIM_FMAX + 1, 0);
 		if (strncmp(argv[1], "bank", 4) == 0) {
 			printf("Active Fuse Bank is %c\n", cur_bank);
 			return 0;
 		}
 		printf("Usage:\n%s\n", cmdtp->usage);
 		return 1;
 	case 3:
 		if (strncmp(argv[1], "bank", 4) == 0) {
 			if (argv[2][0] == '0')
 				cur_bank = '0';
 			else if (argv[2][0] == '1')
 				cur_bank = '1';
 			else {
 				printf("Usage:\n%s\n", cmdtp->usage);
 				return 1;
 			}

 			printf("Setting Active Fuse Bank to %c\n", cur_bank);
 			return 0;
 		}
 		if (strncmp(argv[1], "prog", 4) == 0)
 			return ads5121_fuse_prog(cmdtp, bank, argv[2]);

 		frow = (int)simple_strtol(argv[2], NULL, 10);
 		if (frow == 0 && argv[2][0] != '0')
 			frow = -1;
 		if (!in_range(frow, 0, IIM_FMAX,
 			"<frow> must be between 0-31\n\n", cmdtp->usage))
 			return 1;
 		if (strncmp(argv[1], "read", 4) == 0)
 			return ads5121_fuse_read(bank, frow, 1);
 		if (strncmp(argv[1], "ovride", 6) == 0)
 			return ads5121_fuse_override(bank, frow, 0);
 		if (strncmp(argv[1], "sense", 5) == 0)
 			return ads5121_fuse_sense(bank, frow, 1);
 		printf("Usage:\n%s\n", cmdtp->usage);
 		return 1;
 	case 4:
 		frow = (int)simple_strtol(argv[2], NULL, 10);
 		if (frow == 0 && argv[2][0] != '0')
 			frow = -1;
 		if (!in_range(frow, 0, IIM_FMAX,
 			"<frow> must be between 0-31\n\n", cmdtp->usage))
 			return 1;
 		if (strncmp(argv[1], "read", 4) == 0) {
 			n = (int)simple_strtol(argv[3], NULL, 10);
 			if (!in_range(frow + n, frow + 1, IIM_FMAX + 1,
 				"<frow>+<n> must be between 1-32\n\n",
 				cmdtp->usage))
 				return 1;
 			return ads5121_fuse_read(bank, frow, n);
 		}
 		if (strncmp(argv[1], "ovride", 6) == 0) {
 			v = (int)simple_strtol(argv[3], NULL, 10);
 			return ads5121_fuse_override(bank, frow, v);
 		}
 		if (strncmp(argv[1], "sense", 5) == 0) {
 			n = (int)simple_strtol(argv[3], NULL, 10);
 			if (!in_range(frow + n, frow + 1, IIM_FMAX + 1,
 				"<frow>+<n> must be between 1-32\n\n",
 				cmdtp->usage))
 				return 1;
 			return ads5121_fuse_sense(bank, frow, n);
 		}
 		printf("Usage:\n%s\n", cmdtp->usage);
 		return 1;
 	default: /* at least 5 args */
 		printf("Usage:\n%s\n", cmdtp->usage);
 		return 1;
 	}
 }

 U_BOOT_CMD(
 	fuse, CONFIG_SYS_MAXARGS, 0, do_ads5121_fuse,
 	"   - Read, Sense, Override or Program Fuses\n",
 	"bank <n>		- sets active Fuse Bank to 0 or 1\n"
 	"			    no args shows current active bank\n"
 	"fuse stat		- print active fuse bank's protection status\n"
 	"fuse read [<frow> [<n>]] - print <n> fuse rows starting at <frow>\n"
 	"			    no args to print entire bank's fuses\n"
 	"fuse ovride [<frow> [<v>]]- override fuses at <frow> with <v>\n"
 	"			    no <v> defaults to 0 for the row\n"
 	"			    no args resets entire bank to 0\n"
 	"			  NOTE - settings persist until hard reset\n"
 	"fuse sense [<frow>]	- senses current fuse at <frow>\n"
 	"			    no args for entire bank\n"
 	"fuse prog <frow_bit> 	- program fuse at row <frow>, bit <_bit>\n"
 	"			    <frow> is 0-31, <bit> is 0-7; eg. 13_2 \n"
 	"			  WARNING - this is permanent\n"
 	);
 #endif /* CONFIG_CMD_FUSE */
	/*
	* Copyright 2008 Silicon Turnkey Express, Inc.
	* Martha Marx <mmarx@silicontkx.com>
	*
	* ADS5121 IIM (Fusebox) Interface
	*
	* 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 <command.h>
	#include <asm/io.h>

	#ifdef CONFIG_CMD_FUSE

	DECLARE_GLOBAL_DATA_PTR;

	static char cur_bank = '1';

	char *iim_err_msg(u32 err)
	{
	static char *IIM_errs[] = {
	"Parity Error in cache",
	"Explicit Sense Cycle Error",
	"Write to Locked Register Error",
	"Read Protect Error",
	"Override Protect Error",
	"Write Protect Error"};

	int i;

	if (!err)
	return "";
	for (i = 1; i < 8; i++)
	if (err & (1 << i))
	printf("IIM - %s\n", IIM_errs[i-1]);
	return "";
	}

	int in_range(int n, int min, int max, char err, char usg)
	{
	if (n > max \|\| n < min) {
	printf(err);
	printf("Usage:\n%s\n", usg);
	return 0;
	}
	return 1;
	}

	int ads5121_fuse_read(int bank, int fstart, int num)
	{
	iim512x_t iim = &((immap_t ) CONFIG_SYS_IMMR)->iim;
	u32 *iim_fb, dummy;
	int f, ctr;

	out_be32(&iim->err, in_be32(&iim->err));
	if (bank == 0)
	iim_fb = (u32 *)&(iim->fbac0);
	else
	iim_fb = (u32 *)&(iim->fbac1);
	/* try a read to see if Read Protect is set */
	dummy = in_be32(&iim_fb[0]);
	if (in_be32(&iim->err) & IIM_ERR_RPE) {
	printf("\tRead protect fuse is set\n");
	out_be32(&iim->err, IIM_ERR_RPE);
	return 0;
	}
	printf("Reading Bank %d cache\n", bank);
	for (f = fstart, ctr = 0; num > 0; ctr++, num--, f++) {
	if (ctr % 4 == 0)
	printf("F%2d:", f);
	printf("\t%#04x", (u8)(iim_fb[f]));
	if (ctr % 4 == 3)
	printf("\n");
	}
	if (ctr % 4 != 0)
	printf("\n");
	}

	int ads5121_fuse_override(int bank, int f, u8 val)
	{
	iim512x_t iim = &((immap_t ) CONFIG_SYS_IMMR)->iim;
	u32 *iim_fb;
	u32 iim_stat;
	int i;

	out_be32(&iim->err, in_be32(&iim->err));
	if (bank == 0)
	iim_fb = (u32 *)&(iim->fbac0);
	else
	iim_fb = (u32 *)&(iim->fbac1);
	/* try a read to see if Read Protect is set */
	iim_stat = in_be32(&iim_fb[0]);
	if (in_be32(&iim->err) & IIM_ERR_RPE) {
	printf("Read protect fuse is set on bank %d;"
	"Override protect may also be set\n", bank);
	printf("An attempt will be made to override\n");
	out_be32(&iim->err, IIM_ERR_RPE);
	}
	if (iim_stat & IIM_FBAC_FBOP) {
	printf("Override protect fuse is set on bank %d\n", bank);
	return 1;
	}
	if (f > IIM_FMAX) /* reset the entire bank */
	for (i = 0; i < IIM_FMAX + 1; i++)
	out_be32(&iim_fb[i], 0);
	else
	out_be32(&iim_fb[f], val);
	return 0;
	}

	int ads5121_fuse_prog(cmd_tbl_t cmdtp, int bank, char fuseno_bitno)
	{
	iim512x_t iim = &((immap_t ) CONFIG_SYS_IMMR)->iim;
	int f, i, bitno;
	u32 stat, err;

	f = simple_strtol(fuseno_bitno, NULL, 10);
	if (f == 0 && fuseno_bitno[0] != '0')
	f = -1;
	if (!in_range(f, 0, IIM_FMAX,
	"<frow> must be between 0-31\n\n", cmdtp->usage))
	return 1;
	bitno = -1;
	for (i = 0; i < 6; i++) {
	if (fuseno_bitno[i] == '_') {
	bitno = simple_strtol(&(fuseno_bitno[i+1]), NULL, 10);
	if (bitno == 0 && fuseno_bitno[i+1] != '0')
	bitno = -1;
	break;
	}
	}
	if (!in_range(bitno, 0, 7, "Bit number ranges from 0-7\n"
	"Example of <frow_bitno>: \"18_4\" sets bit 4 of row 18\n",
	cmdtp->usage))
	return 1;
	out_be32(&iim->err, in_be32(&iim->err));
	out_be32(&iim->prg_p, IIM_PRG_P_SET);
	out_be32(&iim->ua, IIM_SET_UA(bank, f));
	out_be32(&iim->la, IIM_SET_LA(f, bitno));
	#ifdef DEBUG
	printf("Programming disabled with DEBUG defined \n");
	printf(""Set up to pro
	printf("iim.ua = %x; iim.la = %x\n", iim->ua, iim->la);
	#else
	out_be32(&iim->fctl, IIM_FCTL_PROG_PULSE \| IIM_FCTL_PROG);
	do
	udelay(20);
	while ((stat = in_be32(&iim->stat)) & IIM_STAT_BUSY);
	out_be32(&iim->prg_p, 0);
	err = in_be32(&iim->err);
	if (stat & IIM_STAT_PRGD) {
	if (!(err & (IIM_ERR_WPE \| IIM_ERR_WPE))) {
	printf("Fuse is successfully set");
	if (err)
	printf(" - however there are other errors");
	printf("\n");
	}
	iim->stat = 0;
	}
	if (err) {
	iim_err_msg(err);
	out_be32(&iim->err, in_be32(&iim->err));
	}
	#endif
	}

	int ads5121_fuse_sense(int bank, int fstart, int num)
	{
	iim512x_t iim = &((immap_t ) CONFIG_SYS_IMMR)->iim;
	u32 iim_fbac;
	u32 stat, err, err_hold = 0;
	int f, ctr;

	out_be32(&iim->err, in_be32(&iim->err));
	if (bank == 0)
	iim_fbac = in_be32(&iim->fbac0);
	else
	iim_fbac = in_be32(&iim->fbac1);
	if (iim_fbac & IIM_FBAC_FBESP) {
	printf("\tSense Protect disallows this operation\n");
	out_be32(&iim->err, IIM_FBAC_FBESP);
	return 1;
	}
	err = in_be32(&iim->err);
	if (err) {
	iim_err_msg(err);
	err_hold \|= err;
	}
	if (err & IIM_ERR_RPE)
	printf("\tRead protect fuse is set; "
	"Sense Protect may be set but will be attempted\n");
	if (err)
	out_be32(&iim->err, err);
	printf("Sensing fuse(s) on Bank %d\n", bank);
	for (f = fstart, ctr = 0; num > 0; ctr++, f++, num--) {
	out_be32(&iim->ua, IIM_SET_UA(bank, f));
	out_be32(&iim->la, IIM_SET_LA(f, 0));
	out_be32(&iim->fctl, IIM_FCTL_ESNS_N);
	do
	udelay(20);
	while ((stat = in_be32(&iim->stat)) & IIM_STAT_BUSY);
	err = in_be32(&iim->err);
	if (err & IIM_ERR_SNSE) {
	iim_err_msg(err);
	out_be32(&iim->err, IIM_ERR_SNSE);
	return 1;
	}
	if (stat & IIM_STAT_SNSD) {
	out_be32(&iim->stat, 0);
	if (ctr % 4 == 0)
	printf("F%2d:", f);
	printf("\t%#04x", (u8)iim->sdat);
	if (ctr % 4 == 3)
	printf("\n");
	}
	if (err) {
	err_hold \|= err;
	out_be32(&iim->err, err);
	}
	}
	if (ctr % 4 != 0)
	printf("\n");
	if (err_hold)
	iim_err_msg(err_hold);

	return 0;
	}

	int ads5121_fuse_stat(int bank)
	{
	iim512x_t iim = &((immap_t ) CONFIG_SYS_IMMR)->iim;
	u32 iim_fbac;
	u32 err;

	out_be32(&iim->err, in_be32(&iim->err));
	if (bank == 0)
	iim_fbac = in_be32(&iim->fbac0);
	else
	iim_fbac = in_be32(&iim->fbac1);
	err = in_be32(&iim->err);
	if (err)
	iim_err_msg(err);
	if (err & IIM_ERR_RPE \|\| iim_fbac & IIM_FBAC_FBRP) {
	if (iim_fbac == 0)
	printf("Since protection settings can't be read - "
	"try sensing fuse row 0;\n");
	return 0;
	}
	if (iim_fbac & IIM_PROTECTION)
	printf("Protection Fuses Bank %d = %#04x:\n", bank, iim_fbac);
	else if (!(err & IIM_ERR_RPE))
	printf("No Protection fuses are set\n");
	if (iim_fbac & IIM_FBAC_FBWP)
	printf("\tWrite Protect fuse is set\n");
	if (iim_fbac & IIM_FBAC_FBOP)
	printf("\tOverride Protect fuse is set\n");
	if (iim_fbac & IIM_FBAC_FBESP)
	printf("\tSense Protect Fuse is set\n");
	out_be32(&iim->err, in_be32(&iim->err));

	return 0;
	}

	int do_ads5121_fuse(cmd_tbl_t cmdtp, int flag, int argc, char argv[])
	{
	int frow, n, v, bank;

	if (cur_bank == '0')
	bank = 0;
	else
	bank = 1;

	switch (argc) {
	case 0:
	case 1:
	printf("Usage:\n%s\n", cmdtp->usage);
	return 1;
	case 2:
	if (strncmp(argv[1], "stat", 4) == 0)
	return ads5121_fuse_stat(bank);
	if (strncmp(argv[1], "read", 4) == 0)
	return ads5121_fuse_read(bank, 0, IIM_FMAX + 1);
	if (strncmp(argv[1], "sense", 5) == 0)
	return ads5121_fuse_sense(bank, 0, IIM_FMAX + 1);
	if (strncmp(argv[1], "ovride", 6) == 0)
	return ads5121_fuse_override(bank, IIM_FMAX + 1, 0);
	if (strncmp(argv[1], "bank", 4) == 0) {
	printf("Active Fuse Bank is %c\n", cur_bank);
	return 0;
	}
	printf("Usage:\n%s\n", cmdtp->usage);
	return 1;
	case 3:
	if (strncmp(argv[1], "bank", 4) == 0) {
	if (argv[2][0] == '0')
	cur_bank = '0';
	else if (argv[2][0] == '1')
	cur_bank = '1';
	else {
	printf("Usage:\n%s\n", cmdtp->usage);
	return 1;
	}

	printf("Setting Active Fuse Bank to %c\n", cur_bank);
	return 0;
	}
	if (strncmp(argv[1], "prog", 4) == 0)
	return ads5121_fuse_prog(cmdtp, bank, argv[2]);

	frow = (int)simple_strtol(argv[2], NULL, 10);
	if (frow == 0 && argv[2][0] != '0')
	frow = -1;
	if (!in_range(frow, 0, IIM_FMAX,
	"<frow> must be between 0-31\n\n", cmdtp->usage))
	return 1;
	if (strncmp(argv[1], "read", 4) == 0)
	return ads5121_fuse_read(bank, frow, 1);
	if (strncmp(argv[1], "ovride", 6) == 0)
	return ads5121_fuse_override(bank, frow, 0);
	if (strncmp(argv[1], "sense", 5) == 0)
	return ads5121_fuse_sense(bank, frow, 1);
	printf("Usage:\n%s\n", cmdtp->usage);
	return 1;
	case 4:
	frow = (int)simple_strtol(argv[2], NULL, 10);
	if (frow == 0 && argv[2][0] != '0')
	frow = -1;
	if (!in_range(frow, 0, IIM_FMAX,
	"<frow> must be between 0-31\n\n", cmdtp->usage))
	return 1;
	if (strncmp(argv[1], "read", 4) == 0) {
	n = (int)simple_strtol(argv[3], NULL, 10);
	if (!in_range(frow + n, frow + 1, IIM_FMAX + 1,
	"<frow>+<n> must be between 1-32\n\n",
	cmdtp->usage))
	return 1;
	return ads5121_fuse_read(bank, frow, n);
	}
	if (strncmp(argv[1], "ovride", 6) == 0) {
	v = (int)simple_strtol(argv[3], NULL, 10);
	return ads5121_fuse_override(bank, frow, v);
	}
	if (strncmp(argv[1], "sense", 5) == 0) {
	n = (int)simple_strtol(argv[3], NULL, 10);
	if (!in_range(frow + n, frow + 1, IIM_FMAX + 1,
	"<frow>+<n> must be between 1-32\n\n",
	cmdtp->usage))
	return 1;
	return ads5121_fuse_sense(bank, frow, n);
	}
	printf("Usage:\n%s\n", cmdtp->usage);
	return 1;
	default: /* at least 5 args */
	printf("Usage:\n%s\n", cmdtp->usage);
	return 1;
	}
	}

	U_BOOT_CMD(
	fuse, CONFIG_SYS_MAXARGS, 0, do_ads5121_fuse,
	" - Read, Sense, Override or Program Fuses\n",
	"bank <n> - sets active Fuse Bank to 0 or 1\n"
	" no args shows current active bank\n"
	"fuse stat - print active fuse bank's protection status\n"
	"fuse read [<frow> [<n>]] - print <n> fuse rows starting at <frow>\n"
	" no args to print entire bank's fuses\n"
	"fuse ovride [<frow> [<v>]]- override fuses at <frow> with <v>\n"
	" no <v> defaults to 0 for the row\n"
	" no args resets entire bank to 0\n"
	" NOTE - settings persist until hard reset\n"
	"fuse sense [<frow>] - senses current fuse at <frow>\n"
	" no args for entire bank\n"
	"fuse prog <frow_bit> - program fuse at row <frow>, bit <_bit>\n"
	" <frow> is 0-31, <bit> is 0-7; eg. 13_2 \n"
	" WARNING - this is permanent\n"
	);
	#endif /* CONFIG_CMD_FUSE */