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--- u-boot-orig/common/cmd_flash.c 2004-12-31 01:32:50.000000000 -0800
+++ u-boot-1.1.2/common/cmd_flash.c 2005-09-13 23:00:14.000000000 -0700
@@ -36,6 +36,11 @@
extern flash_info_t flash_info[]; /* info for FLASH chips */
+static const unsigned int JFFS2_CLEAN_HEADER[] = { 0x20031985,
+ 0x0000000c,
+ 0xe41eb0b1
+ };
+
/*
* The user interface starts numbering for Flash banks with 1
* for historical reasons.
@@ -206,29 +211,46 @@
flash_print_info (&flash_info[bank-1]);
return 0;
}
+void jffs2_write_header(flash_info_t *info, unsigned int first, unsigned int last)
+{
+ unsigned int i;
+ for(i=first; i<=last; i++)
+ {
+ flash_write(JFFS2_CLEAN_HEADER, info->start[i], 12);
+ }
+}
+
int do_flerase (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
{
flash_info_t *info;
ulong bank, addr_first, addr_last;
int n, sect_first, sect_last;
#if (CONFIG_COMMANDS & CFG_CMD_JFFS2) && defined(CONFIG_JFFS2_CMDLINE)
struct mtd_device *dev;
struct part_info *part;
u8 dev_type, dev_num, pnum;
#endif
int rcode = 0;
+ int jffs2erase = 0;
if (argc < 2) {
printf ("Usage:\n%s\n", cmdtp->usage);
return 1;
}
+ // Special JFFS2 erase which will write a JFFS2 "clean" header after the erase
+ if('j' == argv[0][0])
+ {
+ jffs2erase = 1;
+ }
+
if (strcmp(argv[1], "all") == 0) {
for (bank=1; bank<=CFG_MAX_FLASH_BANKS; ++bank) {
printf ("Erase Flash Bank # %ld ", bank);
info = &flash_info[bank-1];
rcode = flash_erase (info, 0, info->sector_count-1);
+ if(jffs2erase) jffs2_write_header(info, 0, info->sector_count-1);
}
return rcode;
}
@@ -235,6 +257,7 @@
printf ("Erase Flash Sectors %d-%d in Bank # %d ",
sect_first, sect_last, (info-flash_info)+1);
rcode = flash_erase(info, sect_first, sect_last);
+ if(jffs2erase) jffs2_write_header(info, sect_first, sect_last);
return rcode;
}
@@ -253,6 +276,7 @@
printf ("Erase Flash Bank # %ld ", bank);
info = &flash_info[bank-1];
rcode = flash_erase (info, 0, info->sector_count-1);
+ if(jffs2erase) jffs2_write_header(info, 0, info->sector_count-1);
return rcode;
}
@@ -264,6 +288,12 @@
return 1;
}
+ if (jffs2erase)
+ {
+ printf ("Usage:\n%s\n", cmdtp->usage);
+ return 1;
+ }
+
rcode = flash_sect_erase(addr_first, addr_last);
return rcode;
}
@@ -517,6 +547,16 @@
);
U_BOOT_CMD(
+ jerase, 3, 1, do_flerase,
+ "jerase - erase FLASH memory for JFFS2\n",
+ "jerase N:SF[-SL]\n - erase sectors SF-SL in FLASH bank # N\n"
+ "jerase bank N\n - erase FLASH bank # N\n"
+ "jerase all\n - erase all FLASH banks\n"
+ " in each case, after erasing a flash sector, that sector\n"
+ " has a JFFS2 'clean' marker written to it\n"
+);
+
+U_BOOT_CMD(
protect, 4, 1, do_protect,
"protect - enable or disable FLASH write protection\n",
"on start end\n"
|
