Hello,
I am using a K9LBG08U0D-PCB0 NAND IC with the i.MX28EVK board.
I tested it with 2013.04 and current imx tree tip. Both same results.
I am having problems to use mtdparts with it as it thinks the NAND has
size as 0 when it gets there. /However/ it properly detects it
initially and the mtd->size variable is magically changes on the fly.
I added following patch in my local tree to debug the issue:
diff --git a/drivers/mtd/nand/nand.c b/drivers/mtd/nand/nand.c
index 4cf4c1c..03faf10 100644
--- a/drivers/mtd/nand/nand.c
+++ b/drivers/mtd/nand/nand.c
@@ -66,11 +66,14 @@ int nand_register(int devnum)
add_mtd_device(mtd);
#endif
+ printf("%s (%d) mtd->size: %d\n", __FUNCTION__, __LINE__, mtd->size);
total_nand_size += mtd->size / 1024;
+ printf("%s (%d) mtd->size: %d\n", __FUNCTION__, __LINE__, mtd->size);
if (nand_curr_device == -1)
nand_curr_device = devnum;
+ printf("%s (%d) mtd->size: %d\n", __FUNCTION__, __LINE__, mtd->size);
return 0;
}
@@ -94,7 +97,9 @@ static void nand_init_chip(int i)
if (nand_scan(mtd, maxchips))
return;
+ printf("%s (%d) mtd->size: %d\n", __FUNCTION__, __LINE__, mtd->size);
nand_register(i);
+ printf("%s (%d) mtd->size: %d\n", __FUNCTION__, __LINE__, mtd->size);
}
#endif
diff --git a/include/configs/mx28evk.h b/include/configs/mx28evk.h
index 07f88ca..1083a88 100644
--- a/include/configs/mx28evk.h
+++ b/include/configs/mx28evk.h
@@ -90,6 +90,8 @@
#define CONFIG_LZO
#define CONFIG_MTD_DEVICE
#define CONFIG_MTD_PARTITIONS
+#define CONFIG_MTD_DEBUG
+#define CONFIG_MTD_DEBUG_VERBOSE 1
#define MTDIDS_DEFAULT "nand0=gpmi-nand"
#define MTDPARTS_DEFAULT \
"mtdparts=gpmi-nand:" \
and what surprises me is the U-Boot log using the above patch:
U-Boot 2013.10-rc2-00159-g06f700a-dirty (Sep 25 2013 - 09:17:17)
CPU: Freescale i.MX28 rev1.2 at 454 MHz
BOOT: NAND, 3V3
DRAM: 128 MiB
NAND: NAND device: Manufacturer ID: 0xec, Chip ID: 0xd7 (Samsung NAND
4GiB 3,3V 8-bit), page size: 4096, OOB size: 218
nand_init_chip (100) mtd->size: 1
nand_register (69) mtd->size: 0
nand_register (71) mtd->size: 4194304
nand_register (76) mtd->size: 1
nand_init_chip (102) mtd->size: 1
4096 MiB
MMC: MXS MMC: 0
Video: MXSFB: 'videomode' variable not set!
In: serial
Out: serial
Err: serial
Net: FEC0 [PRIME], FEC1
So the mtd->size value has change from 0 to 4194304 in the code:
int nand_register(int devnum)
{
...
printf("%s (%d) mtd->size: %d\n", __FUNCTION__, __LINE__, mtd->size);
total_nand_size += mtd->size / 1024;
printf("%s (%d) mtd->size: %d\n", __FUNCTION__, __LINE__, mtd->size);
...
}
and when it gets in the mtdparts code it is '0' thus resulting in the error:
MX28EVK U-Boot > mtdparts default
gpmi-nand: partitioning exceeds flash size
Does someone has a clue about what is going on?
--
Otavio Salvador O.S. Systems
http://www.ossystems.com.br http://code.ossystems.com.br
Mobile: +55 (53) 9981-7854 Mobile: +1 (347) 903-9750
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