Re: [PATCH] Add basic support for mini2440 dev board.

[Belisko Marek <marek.belisko@gmail.com>]

On Tue, Oct 19, 2010 at 11:08 AM, Juergen Beisert <jbe@pengutronix.de> wrote:
> Belisko Marek wrote:
>> On Tue, Oct 19, 2010 at 10:28 AM, Juergen Beisert <jbe@pengutronix.de>
> wrote:
>> > Marek Belisko wrote:
>> >> This work is mainly based on a9m2440 board implementation
>> >> from Juergen Beisert <jbe@pengutronix.de>. Functionality
>> >> was tested only running barebox from ram. Loading to flash
>> >> and booting will not work because missing lowlevel_init
>> >> functionality (lack of jtag debugger on my side ;)).
>> >
>> > I have now access to a mini2440 at Pengutronix. I will add this feature
>> > soon.
>> >
>> >> [...]
>> >> +static int mini2440_devices_init(void)
>> >> +{
>> >> +     uint32_t reg;
>> >> +
>> >> +     reg = readl(BWSCON);
>> >> +
>> >> +     /* CS#4 to access the network controller */
>> >> +     reg &= ~0x000f0000;
>> >> +     reg |=  0x000d0000;     /* 16 bit */
>> >> +     writel(0x1f4c, BANKCON4);
>> >> +
>> >> +     writel(reg, BWSCON);
>> >> +
>> >> +     /* release the reset signal to external devices */
>> >> +     reg = readl(MISCCR);
>> >> +     reg |= 0x10000;
>> >> +     writel(reg, MISCCR);
>> >> +
>> >> +     register_device(&nand_dev);
>> >> +     register_device(&sdram_dev);
>> >> +     register_device(&dm9000_dev);
>> >> +#ifdef CONFIG_NAND
>> >> +     /* ----------- add some vital partitions -------- */
>> >> +     devfs_del_partition("self_raw");
>> >> +     devfs_add_partition("nand0", 0x00000, 0x40000, PARTITION_FIXED,
>> >> "self_raw"); +        dev_add_bb_dev("self_raw", NULL);
>> >> +
>> >> +     devfs_del_partition("env_raw");
>> >> +     devfs_add_partition("nand0", 0x40000, 0x20000, PARTITION_FIXED,
>> >> "env_raw"); + dev_add_bb_dev("env_raw", NULL);
>> >> +#endif
>> >> +     armlinux_add_dram(&sdram_dev);
>> >> +     armlinux_set_bootparams((void *)sdram_dev.map_base + 0x100);
>> >> +     armlinux_set_architecture(MACH_TYPE_MINI2440);
>> >> +
>> >> +     return 0;
>> >> +}
>> >
>> > We need some kind of management here, because the mini2440 comes with NOR
>> > and NAND flash. And both can be configured to boot the system from: We
>> > need a location to store the environment. Maybe in NOR, when booting from
>> > NOR, and in NAND, when booting form NAND? Or only one single location
>> > where to store the environment, independent from the boot source? Ideas?
>>
>> AFAIK NOR flash with supervivi bootloader is used just for repair content
>> of NAND flash when something goes wrong. Do we really need to store
>> barebox to NOR flash?
>
> We do not need it. But maybe we want it ;-)
>
> Why supervivi, when barebox supports the mini2440 completely? (okay, okay,
> needs more work....)
Well yes something like for my free-runner open-moko (in NOR u-boot)
;). You're right.
I can add more support but without jtag debugger I think I can't or
just a matter of luck ;)
that it boot from FLASH. Hope this basic help somebody to add full support.
>
> jbe
>
> --
> Pengutronix e.K.                              | Juergen Beisert             |
> Linux Solutions for Science and Industry      | Phone: +49-8766-939 228     |
> Vertretung Sued/Muenchen, Germany             | Fax:   +49-5121-206917-5555 |
> Amtsgericht Hildesheim, HRA 2686              | http://www.pengutronix.de/  |
>

marek

-- 
as simple and primitive as possible
-------------------------------------------------
Marek Belisko - OPEN-NANDRA
Freelance Developer

Ruska Nova Ves 219 | Presov, 08005 Slovak Republic
Tel: +421 915 052 184
skype: marekwhite
icq: 290551086
web: http://open-nandra.com

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