[PATCH v8 0/3] add the GPMI controller driver for IMX23/IMX28

[b32955@freescale.com (Huang Shijie)]

? 2011?08?02? 16:12, Shawn Guo ??:
> On Tue, Aug 02, 2011 at 02:19:56PM +0800, Huang Shijie wrote:
>> Hi,
>>> On Fri, Jul 29, 2011 at 11:49 AM, Huang Shijie<b32955@freescale.com>   wrote:
>>>> ? 2011?07?29? 15:40, Koen Beel ??:
>>>>> Hi,
>>>>>
>>>>> On Fri, Jul 29, 2011 at 9:20 AM, Lothar Wa?mann<LW@karo-electronics.de>
>>>>>   wrote:
>>>>>> Hi,
>>>>>>
>>>>>> Koen Beel writes:
>>>>>>> Hi,
>>>>>>>
>>>>>>> I have test on mx23evk board. Still see the same issues.
>>>>>>>
>>>>>>> On Wed, Jul 27, 2011 at 3:53 AM, Huang Shijie<b32955@freescale.com>
>>>>>>>   wrote:
>>>>>>>> Hi,
>>>>>>>>
>>>>>>>> Thanks for your test.
>>>>>>>>
>>>>>>>>> Hi,
>>>>>>>>>
>>>>>>>>> It's not really working for me.
>>>>>>>>> I've applied all gpmi-nand driver patches and the dma driver patches.
>>>>>>>>>
>>>>>>>>> I have added following kernel parameters:
>>>>>>>>> mtdparts=gpmi-nand:20m(boot),-(user) ubi.mtd=1 root=ubi0:rootfs0
>>>>>>>>> rootfstype=ubifs gpmi_debug_init
>>>>>>>>>
>>>>>>>>> During boot I get already get DMA timeout:
>>>>>>>>> [    2.560000] [ start_dma_without_bch_irq : 392 ] DMA timeout, last
>>>>>>>>> DMA
>>>>>>>>> :1
>>>>>>>>> [    3.560000] [ start_dma_with_bch_irq : 427 ] bch timeout!!!
>>>>>>>>> ...
>>>>>>>>> (see log file in attach line 89)
>>>>>>> I still see this DMA timeout when booting.
>>>>>>> What kernel parameters do you use? I still use same as above.
>>>>>>>
>>>>>> Do you have an SD card in the system? I'm getting the same error when
>>>>>> accessing an SD card. Without SD card I can use the flash without any
>>>>>> errors.
>>>>> No SD card in the system. At least not on my mx23evk board.
>>>>> My real target hardware has a SDIO wifi chip.
>>>> Does it conflict with the GPMI?
>>> Well I don't know if it conflicts. From what Lothar says I assume
>>> there might be a conflict between gpmi and sdio.
>> Yes, the conflict between gpmi and other module(such as SD in MX6Q)
>> is THE prime reason
>> which caused the DMA timeout.
>>
>> I am debuging the IMX6Q now, and meet the same problem.
>>
> I do not follow on this.  SD on i.mx6q does not use apbh-dma at all.
> How will it conflict with gpmi regarding to dma timeout?
>
The SD shares the same lines with GPMI, such NANDF_WE/NANDF_RE, 
NANDF_ALE, NANDF_CS0.
If the SD card is working, the GPMI will not.


Huang Shijie