Hi Jagan,
On 26/09/2016 17:35, Jagan Teki wrote:
Hi Fabio/Peng/Stefano/Any,
Did anyone tried or used nand boot with SPL and u-boot.img(u-boot-dtb.img)? was it supported by imx6?
Yes, I did sometime ago, and the combination SPL + u-boot.img worked. I think I tried with 2016.05 or 2016.07, I do not test it recently.
So booted with MMC and trying to write the images from 1MB since I read 0x0 on the flash shows FCB.
I do not understand: do you copy SPL into the NAND ?
The use case is having SPL and u-boot.img both in NAND. You can use two different devices, too, but you have to provide your list of spl_devices.
Code:
diff --git a/arch/arm/imx-common/spl.c b/arch/arm/imx-common/spl.c index bdcda7d..72f870e 100644 --- a/arch/arm/imx-common/spl.c +++ b/arch/arm/imx-common/spl.c @@ -84,6 +84,8 @@ u32 spl_boot_mode(const u32 boot_device) return MMCSD_MODE_RAW; #endif break;
case BOOT_DEVICE_NAND:break; default: puts("spl: ERROR: unsupported device\n"); hang();diff --git a/arch/arm/imx-common/spl_nand.cfg b/arch/arm/imx-common/spl_nand.cfg new file mode 100644 index 0000000..e918c0d --- /dev/null +++ b/arch/arm/imx-common/spl_nand.cfg @@ -0,0 +1,2 @@ +IMAGE_VERSION 2 +BOOT_FROM nand
NAND write:
U-Boot > tftpboot ${loadaddr} SPL Using FEC device TFTP from server 192.168.2.68; our IP address is 192.168.2.67 Filename 'SPL'. Load address: 0x12000000 Loading: ####### 1.4 MiB/s done Bytes transferred = 31744 (7c00 hex) U-Boot > nand erase 0x100000 0x100000
NAND erase: device 0 offset 0x100000, size 0x100000 Erasing at 0x1c0000 -- 100% complete.
OK U-Boot > nand write ${loadaddr} 0x100000 0x7c00
I do not understand: SPL is not loaded from NAND from address 0x100000. The SOC expects to have a right FCB from address 0.
NAND write: device 0 offset 0x100000, size 0x100000 1048576 bytes written: OK
U-Boot > tftpboot ${loadaddr} u-boot-dtb.img
I have not tried with -dtb, I cannot say anything.
Using FEC device TFTP from server 192.168.2.68; our IP address is 192.168.2.67 Filename 'u-boot-dtb.img'. Load address: 0x12000000 Loading: ######################################################## 1.7 MiB/s done Bytes transferred = 282470 (44f66 hex) U-Boot > nand erase 0x200000 0x100000
NAND erase: device 0 offset 0x200000, size 0x100000 Erasing at 0x2c0000 -- 100% complete. OK U-Boot > nand write ${loadaddr} 0x200000 0x44f66
NAND write: device 0 offset 0x200000, size 0x100000 1048576 bytes written: OK
Boot Log:
U-Boot SPL 2016.07-ge1e54c7-dirty (Sep 26 2016 - 16:07:01) Trying to boot from unknown boot device SPL: Unsupported Boot Device! SPL: failed to boot from all boot devices ### ERROR ### Please RESET the board ###
This is just because the boot device from the src register is not as expected. I think it does not try at all to load from NAND.
When I add prints on SPL to find whether it is nand bootmode or not? and then did a same nand operations I ended up getting the same SPL log always.
./arch/arm/imx-common/spl.c:
spl_boot_device()
/* NAND Flash: 8.5.2 */ case 0x8 ... 0xf: return BOOT_DEVICE_NAND;
Best regards, Stefano