[U-Boot] Cyclone 5 U-boot 2015.10

[Marek Vasut]

On Tuesday, November 17, 2015 at 04:20:16 PM, Simon Brown wrote:

Hi,

> I thought I checked out "v2015.10", rather than a rc.  I assumed that was
> the proper version.
> 
> The startup message says:
> U-Boot 2015.10-dirty (Nov 17 2015 - 14:31:48 +0000)

Try git describe HEAD ;-)

> I don't have USB either - only input means before ethernet is serial port.
> Not very clever, but at least we have ONE means of getting comms going.

What about ethernet ? Hell, you have an FPGA, you can route the eMMC pins on
some edge connector and plug that thing into a card reader :b

> Regards,
> Simon
> 
> On 17 November 2015 at 15:15, Marek Vasut <marex at denx.de> wrote:
> > On Tuesday, November 17, 2015 at 04:03:03 PM, Simon Brown wrote:
> > > Ok, that seems to have helped - I think one problem I had was using
> > > u-boot.img, not u-boot-dtb.img - what is the difference?
> > 
> > The later has the device tree attached to the end of the binary,
> > the former does not.
> > 
> > > It now prints the U-boot startup prompt, followed by some information
> > 
> > about
> > 
> > > setup, up to DRAM: 1 GiB
> > > then it says "Error binding driver 'gpio-dwapb'" three times, followed
> > > by
> > > 
> > > some other error messages:
> > > >Some drivers failed to bind
> > > >Error binding driver 'generic_simple_bus'
> > > >Some drivers failed to bind
> > > 
> > > finishing with "initcall sequence 3ffb1ce4 failed at call
> > > 010031bf(err=-1)".
> > 
> > Is this stock 2015.10 or u-boot/master ?
> > 
> > > As regards not configuring SD card until after we boot - we made the
> > > decision to use an EMMC chip rather than an SD card, but no means of
> > > programming it without Linux!
> > 
> > Oh, we do the same on MCVEVK. At one point, I just cooked stripped down
> > version of U-Boot with USB mass storage support and placed that into
> > RAM cells in the FPGA. Then I made the SoCFPGA boot from FPGA.
> > 
> > The MCVEVK behaves as a USB stick and the eMMC is the backing store.
> > 
> > > Anyway, will try and workout what the above errors signify.
> > > Kind regards,
> > > 
> > > Simon
> > > 
> > > On 17 November 2015 at 14:18, Marek Vasut <marex at denx.de> wrote:
> > > > On Tuesday, November 17, 2015 at 02:08:21 PM, Simon Brown wrote:
> > > > > Hi,
> > > > 
> > > > Hi,
> > > > 
> > > > > I've been in discussion with Marek on this issue, and he suggested
> > > > > I post to the u-boot mailing list.
> > > > > 
> > > > > I've git cloned uboot 2015.10 and checked it out in my own branch. 
> > > > > I wasn't about to submit anything back, but this way I hopefully
> > 
> > wouldn't
> > 
> > > > > break anything if I did!
> > > > > 
> > > > > I've created a new board, "Axim".  I've setup the DTS, Kconfig,
> > > > > defconfig files etc similar to the Atlas board addition, and things
> > > > > are compiling ok.  However, when I run U-boot it gets to a
> > > > > relatively early point and then says "### ERROR ### Please reset
> > > > > the board ###". I can't see it say this ,as it no longer talks to
> > > > > the UART, but I can see that it points to the memory address
> > > > > containing this string in
> > 
> > the
> > 
> > > > > debugger, so assume
> > > > 
> > > > that's
> > > > 
> > > > > what it prints out, before entering an endless loop.
> > > > > 
> > > > > My setup is slightly odd, in that I need to get U-boot running
> > 
> > before I
> > 
> > > > can
> > > > 
> > > > > configure an SD card.
> > > > 
> > > > Why ?
> > > > 
> > > > > This means I'm programming my FPGA via JTAG, then
> > > > > loading the preloader with the ARM DS-5 debugger via JTAG and
> > > > > running it.
> > > > 
> > > > OK, so what I suggest you do (to make things easy) is:
> > > > 
> > > > 1) edit arch/arm/mach-socfpga/spl.c
> > > > 2) locate board_init_f()
> > > > 3) Add the following code all the way to the end of board_init_f()
> > 
> > (which
> > 
> > > > is,
> > > > 
> > > >    incidentally, at the end of the file):
> > > >    asm volatile("x: b x");
> > > > 
> > > > This will make sure that the SPL starts spinning in an endless loop
> > > > at this point. Once you load this modified SPL with your debugger,
> > > > it will init the hardware, but it won't do anything funny anymore.
> > > > 
> > > > So once your hardware is running, load U-Boot (u-boot-dtb.bin) to
> > > > 0x01000040
> > > > and execute it from that address. This should get you the prompt.
> > > > 
> > > > > I get output on the UART (via FPGA pins), to my PC, to suggest that
> > 
> > all
> > 
> > > > is
> > > > 
> > > > > running well.  I can then upload my u-boot.img file to the
> > > > > preloader
> > > > 
> > > > using
> > > > 
> > > > > Ymodem (preloader configured to accept this), and I can run U-boot.
> > > > > 
> > > > > Before I was using the preconfigured 2013.01.01 U-boot as provided
> > > > > on Rocketboards.org, but since we are using the KSZ9031 chip for
> > > > > our PHY
> > > > 
> > > > felt
> > > > 
> > > > > I needed a newer version to support this.  But 2013.01.01 runs ok,
> > 
> > and
> > 
> > > > > I can get to the U-boot prompt on the UART, whereas 2015 hangs.
> > > > > 
> > > > > Any clues gratefully received.
> > > > 
> > > > Try the above method, hope that helps.
> > > > 
> > > > Best regards,
> > > > Marek Vasut