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

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

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?
>
> 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/  |
>

thanks,

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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