mtd: nandsim: add module param for BBT handling

I used this to check the BBT on flash together with a hack in mtdchar in
order to read bad blocks.

Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>

1 files changed, 17 insertions, 2 deletions

diff --git a/drivers/mtd/nand/nandsim.c b/drivers/mtd/nand/nandsim.c
index c25648bb5793..a6a73aab1253 100644
--- a/drivers/mtd/nand/nandsim.c
+++ b/drivers/mtd/nand/nandsim.c
@@ -107,6 +107,7 @@ static char *gravepages = NULL;
 static unsigned int rptwear = 0;
 static unsigned int overridesize = 0;
 static char *cache_file = NULL;
+static unsigned int bbt;
 
 module_param(first_id_byte,  uint, 0400);
 module_param(second_id_byte, uint, 0400);
@@ -130,6 +131,7 @@ module_param(gravepages,     charp, 0400);
 module_param(rptwear,        uint, 0400);
 module_param(overridesize,   uint, 0400);
 module_param(cache_file,     charp, 0400);
+module_param(bbt,            uint, 0400);
 
 MODULE_PARM_DESC(first_id_byte,  "The first byte returned by NAND Flash 'read ID' command (manufacturer ID)");
 MODULE_PARM_DESC(second_id_byte, "The second byte returned by NAND Flash 'read ID' command (chip ID)");
@@ -162,6 +164,7 @@ MODULE_PARM_DESC(overridesize,   "Specifies the NAND Flash size overriding the I
                                  "The size is specified in erase blocks and as the exponent of a power of two"
                                  " e.g. 5 means a size of 32 erase blocks");
 MODULE_PARM_DESC(cache_file,     "File to use to cache nand pages instead of memory");
+MODULE_PARM_DESC(bbt,            "0 OOB, 1 BBT with marker in OOB, 2 BBT with marker in data area");
 
 /* The largest possible page size */
 #define NS_LARGEST_PAGE_SIZE    4096
@@ -2264,6 +2267,18 @@ static int __init ns_init_module(void)
         /* and 'badblocks' parameters to work */
         chip->options   |= NAND_SKIP_BBTSCAN;
 
+        switch (bbt) {
+        case 2:
+                 chip->options |= NAND_USE_FLASH_BBT_NO_OOB;
+        case 1:
+                 chip->options |= NAND_USE_FLASH_BBT;
+        case 0:
+                break;
+        default:
+                NS_ERR("bbt has to be 0..2\n");
+                retval = -EINVAL;
+                goto error;
+        }
         /*
          * Perform minimum nandsim structure initialization to handle
          * the initial ID read command correctly
@@ -2321,10 +2336,10 @@ static int __init ns_init_module(void)
         if ((retval = init_nandsim(nsmtd)) != 0)
                 goto err_exit;
 
-        if ((retval = parse_badblocks(nand, nsmtd)) != 0)
+        if ((retval = nand_default_bbt(nsmtd)) != 0)
                 goto err_exit;
 
-        if ((retval = nand_default_bbt(nsmtd)) != 0)
+        if ((retval = parse_badblocks(nand, nsmtd)) != 0)
                 goto err_exit;
 
         /* Register NAND partitions */