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

[Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>]

On 10:28 Tue 19 Oct     , Juergen Beisert 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?
I like the idea to store in the boot media

Best Regards,
J.

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