Kernel panic when loading the IDE controller driver

[Bartlomiej Zolnierkiewicz]

On 02/14/2019 06:54 PM, Christophe Leroy wrote:
> 
> 
> Le 13/02/2019 à 16:27, Christophe Leroy a écrit :
>>
>>
>> Le 13/02/2019 à 13:53, sgosavi1 a écrit :
>>>> Why using 4.15.13 which is obsolete instead of using one of the Long
>>>> Term Support versions which are still maintained, like 4.14 or 4.19 ?
>>>> (see the complete list at https://www.kernel.org/category/releases.html)
>>>
>>> Well, when I started this task 4.15.13 was probably the latest stable
>>> release and hence we decided to port this version. In the older kernel, we
>>> have the m8260_setup.c source file for our board where the function
>>> "io_block_mapping" was used to configure the non-standard IO port address
>>> starting at 0xe0000000 location. This address was passed as the base address
>>> followed by control address and IRQ number to the ide-core.ko module. In the
>>> new kernel we do not have an option to send these addresses and IRQ numbers
>>> as arguments to the driver. Instead the ide-generic.c source file in the new
>>> kernel uses the standard IO port values and IRQ values. I modified the code
>>> in the above file to used the addresses and IRQ number we used in the past.
>>> Also, added code in the "MMU_init" function call available under
>>> arch/PowerPC/init_32.c to setup the IO port address range by adding the
>>> "io_block_mapping" call and the required IO port address range.
>>>
>>> Is there anything else that needs to be added or how can we configure the
>>> desired IO address range in the new kernel?
>>>
>>
>> Maybe look around https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=9a0e77f28b50128df0c9e26ae489e44e29a7270a
>>
>> Also look at ide_platform.c. I imagine there must be some way to set it up in your device tree.

Please don't add new users to subsystem deprecated almost 10 years ago..

>> Maybe Bartlomiej Zolnierkiewicz can help ?
>>
>> Christophe
> 
> Le 14/02/2019 à 09:17, sgosavi1 a écrit :>> Maybe look around
>>
>> I have gone through this before and also tried the pata_platform driver but
>> no success yet. I haven't found any example that passes the IO ports and IRQ
>> information through the device tree to the driver code.

Please look at pata_of_platform.c driver from libata subsystem,
it should have all required functionality.

>> Thanks,
>> Sachin.
> 
> 
> Maybe someone from the IDE SUBSYSTEM would be able to help better ?
> 
> Entire thread at http://linuxppc.10917.n7.nabble.com/Kernel-panic-when-loading-the-IDE-controller-driver-td150020.html#none
> 
> Christophe

Best regards,
--
Bartlomiej Zolnierkiewicz
Samsung R&D Institute Poland
Samsung Electronics