Eric Lee / smarc-uboot

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cmd/fuse.c 3.33 KB
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83d290c56   Tom Rini   SPDX: Convert all... 
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  // SPDX-License-Identifier: GPL-2.0+
ccca7dfd0   Benoît Thébaudeau   Add fuse API and ... 
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  /*
   * (C) Copyright 2009-2013 ADVANSEE
   * Benoît Thébaudeau <benoit.thebaudeau@advansee.com>
   *
   * Based on the mpc512x iim code:
   * Copyright 2008 Silicon Turnkey Express, Inc.
   * Martha Marx <mmarx@silicontkx.com>
ccca7dfd0   Benoît Thébaudeau   Add fuse API and ... 
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   */
  
  #include <common.h>
  #include <command.h>
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  #include <console.h>
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  #include <fuse.h>
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  #include <linux/errno.h>
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  static int strtou32(const char *str, unsigned int base, u32 *result)
  {
  	char *ep;
  
  	*result = simple_strtoul(str, &ep, base);
  	if (ep == str || *ep != '\0')
  		return -EINVAL;
  
  	return 0;
  }
  
  static int confirm_prog(void)
  {
  	puts("Warning: Programming fuses is an irreversible operation!
  "
  			"         This may brick your system.
  "
  			"         Use this command only if you are sure of "
  					"what you are doing!
  "
  			"
  Really perform this fuse programming? <y/N>
  ");
a5dffa4b6   Pierre Aubert   Add the function ... 
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  	if (confirm_yesno())
  		return 1;
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  	puts("Fuse programming aborted
  ");
  	return 0;
  }
  
  static int do_fuse(cmd_tbl_t *cmdtp, int flag, int argc, char *const argv[])
  {
  	const char *op = argc >= 2 ? argv[1] : NULL;
  	int confirmed = argc >= 3 && !strcmp(argv[2], "-y");
  	u32 bank, word, cnt, val;
  	int ret, i;
  
  	argc -= 2 + confirmed;
  	argv += 2 + confirmed;
  
  	if (argc < 2 || strtou32(argv[0], 0, &bank) ||
  			strtou32(argv[1], 0, &word))
  		return CMD_RET_USAGE;
  
  	if (!strcmp(op, "read")) {
  		if (argc == 2)
  			cnt = 1;
  		else if (argc != 3 || strtou32(argv[2], 0, &cnt))
  			return CMD_RET_USAGE;
  
  		printf("Reading bank %u:
  ", bank);
  		for (i = 0; i < cnt; i++, word++) {
  			if (!(i % 4))
  				printf("
  Word 0x%.8x:", word);
  
  			ret = fuse_read(bank, word, &val);
  			if (ret)
  				goto err;
  
  			printf(" %.8x", val);
  		}
  		putc('
  ');
  	} else if (!strcmp(op, "sense")) {
  		if (argc == 2)
  			cnt = 1;
  		else if (argc != 3 || strtou32(argv[2], 0, &cnt))
  			return CMD_RET_USAGE;
  
  		printf("Sensing bank %u:
  ", bank);
  		for (i = 0; i < cnt; i++, word++) {
  			if (!(i % 4))
  				printf("
  Word 0x%.8x:", word);
  
  			ret = fuse_sense(bank, word, &val);
  			if (ret)
  				goto err;
  
  			printf(" %.8x", val);
  		}
  		putc('
  ');
  	} else if (!strcmp(op, "prog")) {
  		if (argc < 3)
  			return CMD_RET_USAGE;
  
  		for (i = 2; i < argc; i++, word++) {
  			if (strtou32(argv[i], 16, &val))
  				return CMD_RET_USAGE;
  
  			printf("Programming bank %u word 0x%.8x to 0x%.8x...
  ",
  					bank, word, val);
  			if (!confirmed && !confirm_prog())
  				return CMD_RET_FAILURE;
  			ret = fuse_prog(bank, word, val);
  			if (ret)
  				goto err;
  		}
  	} else if (!strcmp(op, "override")) {
  		if (argc < 3)
  			return CMD_RET_USAGE;
  
  		for (i = 2; i < argc; i++, word++) {
  			if (strtou32(argv[i], 16, &val))
  				return CMD_RET_USAGE;
  
  			printf("Overriding bank %u word 0x%.8x with "
  					"0x%.8x...
  ", bank, word, val);
  			ret = fuse_override(bank, word, val);
  			if (ret)
  				goto err;
  		}
  	} else {
  		return CMD_RET_USAGE;
  	}
  
  	return 0;
  
  err:
  	puts("ERROR
  ");
814b66144   Hector Palacios   cmd_fuse: return ... 
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  	return CMD_RET_FAILURE;
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  }
  
  U_BOOT_CMD(
  	fuse, CONFIG_SYS_MAXARGS, 0, do_fuse,
  	"Fuse sub-system",
  	     "read <bank> <word> [<cnt>] - read 1 or 'cnt' fuse words,
  "
  	"    starting at 'word'
  "
  	"fuse sense <bank> <word> [<cnt>] - sense 1 or 'cnt' fuse words,
  "
  	"    starting at 'word'
  "
  	"fuse prog [-y] <bank> <word> <hexval> [<hexval>...] - program 1 or
  "
  	"    several fuse words, starting at 'word' (PERMANENT)
  "
  	"fuse override <bank> <word> <hexval> [<hexval>...] - override 1 or
  "
  	"    several fuse words, starting at 'word'"
  );