Hi,
I am new to flash devices. I am writing AM29LV256MH 16MB flash
map driver using MTD for davinci board.
I used jedec_probe. The flash is 16 bit.
I mapped my partitions for the flash.
Iam using 2.6.15 kernel.
When the kernel loads, it succesfully detects the flash.
i gave starting address as 0x02000000 & length as 0x01000000 & width as
2.
Initially jedec_probe not detected the flash, then i hotcoded mfr-id as
0x0001 & dev-id as 0x227e. Then it detected.
after booting up the kernel, cat /proc/mtd displayed the following
thing,
dev: size erasesize name
mtd0: 01000000 00010000 Entire flash
mtd1: 00050000 00010000 Bootloader
mtd2: 00200000 00010000 Kernel
mtd3: 00c00000 00010000 Filesystem
mtd4: 001b0000 00010000 Reserved
All this seems to be ok, but normal read/write/erase operation on flash
device not happening.
I tried to read from the device /dev/mtd0 & dumped into file, the file
displayed only zeros.
Normally when no contents is there, it should display only ffff's but is
strange it is displaying zeros.
Then i tried to erase the flash using mtd-utils,
i got MEMERASE: input/output error.
Somebody help me............ please............
Harish
_______________________________________________
Davinci-linux-open-source mailing list
[email protected]
http://linux.davincidsp.com/mailman/listinfo/davinci-linux-open-source
