[U-Boot] Moving custom board imx6q from u-boot-imx 2014.04 to 2015.04 lead to freeze

[U-Boot] Moving custom board imx6q from u-boot-imx 2014.04 to 2015.04 lead to freeze

[Roberto Fichera]

Hi All,

After upgrading my u-boot-imx v2014.04 to v2015.04 I was not able to boot anymore my custom iMX6Q board.
Everything seems stopping after relocation.

Last executed initcall is the setup_reloc(), and the board_init_f() will finish correctly. It seems that
it's freezing somewhere within arch/arm/lib/crt0.S after calling the board_init_f().

Does anyone can suggest where to look better?

Thanks in advance,
Roberto Fichera.

initcall: 1782e45c


U-Boot 2015.04-imx_v2015.04_3.14.38_6qp_ga+gf80d628 (Feb 10 2016 - 12:09:32)

initcall: 17806230
U-Boot code: 17800000 -> 17846BB0  BSS: -> 17881394
initcall: 17801d5c
CPU:   Freescale i.MX6Q rev1.5 at 792 MHz
uclass_find_device_by_seq: 0 -1
uclass_find_device_by_seq: 0 0
   - -1 -1
   - not found
CPU:   Temperature 43 C
Reset cause: POR
initcall: 17806700
Board: Janas iMX6Q (ID:e315c0641d0f31d4)
initcall: 17806274
I2C:   ready
initcall: 1780625c
DRAM:  initcall: 178033b0
initcall: 17806464
Monitor len: 00081394
Ram size: 80000000
Ram top: 90000000
initcall: 17805ff0
initcall: 178061d8
TLB table from 8fff0000 to 8fff4000
initcall: 17806388
initcall: 1780618c
Reserving 516k for U-Boot at: 8ff6e000
initcall: 1780615c
Reserving 16392k for malloc() at: 8ef6c000
initcall: 1780632c
Reserving 80 Bytes for Board Info at: 8ef6bfb0
initcall: 17806008
initcall: 17806128
Reserving 248 Bytes for Global Data at: 8ef6beb8
initcall: 178060bc
initcall: 17806010
initcall: 178064d0
initcall: 17806440
initcall: 1780639c

RAM Configuration:
Bank #0: 10000000 2 GiB

DRAM:  2 GiB
initcall: 178060a0
New Stack Pointer is: 8ef6be90
initcall: 17806018
initcall: 17806050  <--- setup_reloc()
Relocation Offset is: 7876e000
Relocating to 8ff6e000, new gd at 8ef6beb8, sp@8ef6be90

[U-Boot] Moving custom board imx6q from u-boot-imx 2014.04 to 2015.04 lead to freeze

[Fabio Estevam]

On Wed, Feb 10, 2016 at 9:47 AM, Roberto Fichera <kernel@tekno-soft.it> wrote:
> Hi All,
>
> After upgrading my u-boot-imx v2014.04 to v2015.04 I was not able to boot anymore my custom iMX6Q

Why don't you try 2016.01 instead?

[U-Boot] Moving custom board imx6q from u-boot-imx 2014.04 to 2015.04 lead to freeze

[Roberto Fichera]

On 02/10/2016 07:59 PM, Fabio Estevam wrote:

Hi Fabio,

> On Wed, Feb 10, 2016 at 9:47 AM, Roberto Fichera <kernel@tekno-soft.it> wrote:
>> Hi All,
>>
>> After upgrading my u-boot-imx v2014.04 to v2015.04 I was not able to boot anymore my custom iMX6Q
> Why don't you try 2016.01 instead?

Ok! Will do! However I've found that with this patch below it boots pretty fine! Do you know why?

diff --git a/arch/arm/lib/crt0.S b/arch/arm/lib/crt0.S
index 92d3732..f87acb6 100644
--- a/arch/arm/lib/crt0.S
+++ b/arch/arm/lib/crt0.S
@@ -108,7 +108,7 @@ here:
  * now relocate vectors
  */
 
-    bl    relocate_vectors
+    /* bl    relocate_vectors */
 
 /* Set up final (full) environment */

[U-Boot] Moving custom board imx6q from u-boot-imx 2014.04 to 2015.04 lead to freeze

[Roberto Fichera]

On 02/10/2016 07:59 PM, Fabio Estevam wrote:
> On Wed, Feb 10, 2016 at 9:47 AM, Roberto Fichera <kernel@tekno-soft.it> wrote:
>> Hi All,
>>
>> After upgrading my u-boot-imx v2014.04 to v2015.04 I was not able to boot anymore my custom iMX6Q
> Why don't you try 2016.01 instead?
>

It has the same problem, below standard boot without apply any changes:

U-Boot 2016.01-v2016.01+gfa85e82 (Feb 11 2016 - 10:05:36 +0100)

CPU:   Freescale i.MX6Q rev1.5 at 792 MHz
Reset cause: POR
Board: Janas iMX6Q (ID:e315c0641d0f31d4)
I2C:   Error, wrong i2c adapter 0 max 0 possible
Error, wrong i2c adapter 0 max 0 possible
ready
DRAM:  2 GiB
<...freeze...>

Apply similar patch for v2015.04

diff --git a/arch/arm/lib/crt0.S b/arch/arm/lib/crt0.S
index 92d3732..f87acb6 100644
--- a/arch/arm/lib/crt0.S
+++ b/arch/arm/lib/crt0.S
@@ -108,7 +108,7 @@ here:
  * now relocate vectors
  */
 
-    bl    relocate_vectors
+    /* bl    relocate_vectors */
 
 /* Set up final (full) environment */

still need to  fix some voltages and ldo bypass but at least boot

U-Boot 2016.01-v2016.01+gfa85e82 (Feb 11 2016 - 10:38:05 +0100)

CPU:   Freescale i.MX6Q rev1.5 at 792 MHz
Reset cause: POR
Board: Janas iMX6Q (ID:e315c0641d0f31d4)
I2C:   ready
DRAM:  2 GiB
PMIC:  PFUZE100 ID=0x10
MMC:   FSL_SDHC: 0, FSL_SDHC: 1
Card did not respond to voltage select!
*** Warning - MMC init failed, using default environment

PCI:   pcie phy link never came up
In:    serial
Out:   serial
Err:   serial
switch to partitions #0, OK
mmc1(part 0) is current device
Net:   FEC [PRIME]
Error: FEC address not set.

Hit any key to stop autoboot:  0
=>

[U-Boot] Moving custom board imx6q from u-boot-imx 2014.04 to 2015.04 lead to freeze

[Fabio Estevam]

On Thu, Feb 11, 2016 at 5:50 AM, Roberto Fichera <kernel@tekno-soft.it> wrote:

> Ok! Will do! However I've found that with this patch below it boots pretty fine! Do you know why?
>
> diff --git a/arch/arm/lib/crt0.S b/arch/arm/lib/crt0.S
> index 92d3732..f87acb6 100644
> --- a/arch/arm/lib/crt0.S
> +++ b/arch/arm/lib/crt0.S
> @@ -108,7 +108,7 @@ here:
>   * now relocate vectors
>   */
>
> -    bl    relocate_vectors
> +    /* bl    relocate_vectors */
>
>  /* Set up final (full) environment */
>

I am not sure why removing this line fixes the boot for you.

This line has been added by commit:

commit db544b9662622826b8482c126c116ec366fcd58c
Author: Albert ARIBAUD <albert.u.boot@aribaud.net>
Date:   Thu Nov 13 17:59:15 2014 +0100

    imx: fix exception vectors relocation in imx27

Adding Albert on Cc in case he has any ideas as to why this would
impact mx6 to boot.