Hi Sascha,
The Nand port to imx27ads is booting when I use a Samsung device (128MiB, 3.3V,
8-bit, 512page).
Now my requirement is to boot from a Micron device (256MiB, 3.3V, 8-bit, 2k
page). Part num: MT29F2G08AAD
I modified the line in imx27ads.c to
imx_nand_load_image((void *)TEXT_BASE, 256 * 1024, 2048, (2048 * 64)); //256MB,
2K
Q>> Is this correct?
I have also commented some lines in nand_get_flash_type which checks the
Manf./device ID again!
Once modified, I loaded the image to the RAM location 0xa7f00000 and executed.
I get the following output.
**************************************************************************************************************
U-Boot 2.0.0-rc5-git (Oct 31 2008 - 09:03:01)
Board: Freescale i.MX27 ADS
cfi_probe: cfi_flash base: 0xc0000000 size: 0x02000000
NAND device: Manufacturer ID: 0x2c, Chip ID: 0xda (Micron NAND 256MiB 3,3V
8-bit)
Scanning device for bad blocks
Using environment in NAND Flash
chip id: [1,882,1,01d]
mpll: 398999390 Hz
spll: 239999725 Hz
arm: 398999390 Hz
perclk1: 29555510 Hz
perclk2: 26599959 Hz
perclk3: 66499898 Hz
perclk4: 26599959 Hz
clkin26: 26000000 Hz
ahb: 132999796 Hz
ipg: 66499898 Hz
Malloc space: 0xa7b00000 -> 0xa7f00000 (size 4 MB)
Stack space : 0xa7af8000 -> 0xa7b00000 (size 32 kB)
envfs: wrong magic on /dev/env0
no valid environment found on /dev/env0. Using default environment
running /env/bin/init...
Usage:
adds a partition table to a device
Hit any key to stop autoboot: 3
type update_kernel [<imagename>] to update kernel into flash
type udate_root [<imagename>] to update rootfs into flash
uboot:/
**********************************************************************************************************************
But once I program the uboot image to the micron flash, nothing seems to appear
on the UART. I am using the Ronetix PEEDI JTAG programmer.
1. Is there anything/anywhere else I should modify the uboot code for the
micron nand flash to boot?
2. How can I reduce the frequency of operation through uboot?
3. If I do single stepping, it seems that the first 2k data is being copied
successfully from the SRAM to the DDR. But if I execute/give a "go" nothing
appears on the UART, but PC=0x00000004.
4. How can I introduce more delay between each NAND operation?
5. How do I enable the DEBUG functions in uboot? or how do I start debuging
from this point onwards?
Help on these are very much appreciated.
Thank You,
Tiju
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