i.MX6 Manufacturing Tool Issue

PaulDeMetrotion — Mon, 10 Feb 2014 16:34:51 GMT

I am working on a custom device that uses the i.MX6Q processor. I am trying to use the Manufacturing Tool version 4.1.0 to program an SPI-NOR device on an SPI bus. I use LTIB to generate u-boot and uImage binaries without any problems. I also generate the initramfs.cpio.gz.uboot file.

If I use the initramfs.cpio.gz.uboot file included with the manufacturing tool release, I can program our device without any problem. If I try to use the initramfs file built by LTIB, I cannot use the manufacturing tool.

Following is a portion of the console output where the boot fails. Any idea why the root device being searched for is not included? Is there a build setting that I need to change?

mxc_dvfs_core_probe

DVFS driver module loaded

snvs_rtc snvs_rtc.0: setting system clock to 1970-01-01 03:06:22 UTC (11182)

VFS: Cannot open root device "(null)" or unknown-block(0,0)

Please append a correct "root=" boot option; here are the available partitions:

1f00 512 mtdblock0 (driver?)

1f01 8 mtdblock1 (driver?)

1f02 3520 mtdblock2 (driver?)

Unable to handle kernel NULL pointer dereference at virtual address 00000027

pgd = e71a8000

[00000027] *pgd=7712a831, *pte=00000000, *ppte=00000000

Internal error: Oops: 17 [#1] PREEMPT SMP

Modules linked in:

CPU: 3 Not tainted (3.0.35-2666-gbdde708 #44)

PC is at fget+0x40/0xbc

LR is at fget+0x20/0xbc

pc : [<800e44bc>] lr : [<800e449c>] psr: a0000013

sp : e7181f30 ip : 10c53c7d fp : 00000000

r10: 00000000 r9 : e7180000 r8 : 8003b184

r7 : 000000c5 r6 : 00000011 r5 : e9c4ee00 r4 : ffffffff

r3 : e74f1008 r2 : 00000100 r1 : e7181f50 r0 : 00000001

Flags: NzCv IRQs on FIQs on Mode SVC_32 ISA ARM Segment user

Control: 10c53c7d Table: 771a804a DAC: 00000015

Process env (pid: 4342, stack limit = 0xe71802f0)

Stack: (0xe7181f30 to 0xe7182000)

1f20: 00000001 7ee8abf0 e7181f50 800e7620

1f40: 00000001 7ee8abf0 ffffffff 800e7814 e9d61d80 60000013 00000001 2aae9000

1f60: 2aae9000 e7180000 00000005 00000000 e7180000 00000000 7ee8aaac 800d1fdc

1f80: 08100875 0002ab82 e9c4ee40 e9bb8000 2aae9560 00000018 2aac4724 0000040f

1fa0: 2ad645d0 8003b000 2ad645d0 ffffffff 00000001 7ee8abf0 7ee8abf0 00000001

1fc0: 2ad645d0 ffffffff 00000011 000000c5 0000011e 00000000 2aae9000 00000000

1fe0: 2ac9ccf0 7ee8abe4 2ac9a1c8 2acf6034 20000010 00000001 79ffc811 79ffcc11

[<800e44bc>] (fget+0x40/0xbc) from [<800e7620>] (vfs_fstat+0xc/0x3c)

[<800e7620>] (vfs_fstat+0xc/0x3c) from [<800e7814>] (sys_fstat64+0x14/0x30)

[<800e7814>] (sys_fstat64+0x14/0x30) from [<8003b000>] (ret_fast_syscall+0x0/0x30)

Code: e5933004 e7934104 e3540000 0a000017 (e5943028)

Re: i.MX6 Manufacturing Tool Issue

PaulDeMetrotion — Wed, 12 Feb 2014 14:54:16 GMT

I have attached a file that shows the difference between the two console outputs. The top one shows a successful boot with the original initramfs file and the bottom one shows the boot failure with the custom built initramfs file.

Re: i.MX6 Manufacturing Tool Issue

KursadOney — Wed, 12 Feb 2014 17:09:41 GMT

You should post the full boot log. There is not enough information here. There are many things that might have gone wrong like:

* Your u-boot doesn't boot to initramfs

* Incorrect address for initramfs

* Problem with the initramfs configuration or files

As a first thing, I would check if /init is pointing to the right place like /bin/busybox. Avoid using relative paths like ../bin/busybox.

Re: i.MX6 Manufacturing Tool Issue

PaulDeMetrotion — Wed, 12 Feb 2014 17:43:39 GMT

I get my first response right after I fixed the problem. The solution was simple but not specified in the Manufacturing Tool Firmware Development Guide. The document should specify that the uuc and mtd-utils packages should be included in the kernel build. This may be obvious but I missed it. Once I selected these packages, the archive file initramfs.cpio.gz.uboot was usable during the manufacturing process.

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