Hi Eric,
On 01/20/2012 01:56 AM, Eric Nelson wrote:
Hi Wolfgang,
On 01/19/2012 03:26 AM, Dirk Behme wrote:
Dear Wolfgang,
On 19.01.2012 10:58, Wolfgang Grandegger wrote:
Where can I find the "SPI_to_SD_loader.bin" image?
Unfortunately, at the moment you have to ask your Freescale contact for this. We ping Freescale since weeks for this. Last time I heard about this Freescale planned to release this binary under a BSD license. They are still "working through the licensing details", though :(
What means early version of SabreLite boards?
Most probably Eric will be able to better answer this.
At this point **all** versions of SabreLite are configured to boot to SPI NOR through the fuses.
As Dirk mentioned, we've had some conversations about booting to SD card, but once the fuse is blown, it's blown.
What I understood: Up to now, the boards boot from SPI NOR by default. There was some _discussion_ to change this to SD boot. Most probably "early version" was written while this discussion under the impression that later boards might switch to SD boot. To my understanding the result of this discussion was that this change would be difficult, though.
We've discussed, but currently have no plans to support a physical switch to control this decision. This would involve using the "Internal" boot mode position of SW1 and then pulling a **bunch** of pins high or low to control the boot flow.
Note that all of the pins are available on connector J12 (BOOT/EIM), so it might be done with a small daughter-board.
OK, I see.
How can I select boot from SD-Card on newer versions?
To my understanding there are no "newer versions" yet.
Right.
And will the u-boot.imx image also boot when loaded to the SPI-NOR fash?
Hmm, I'm not sure about this as I haven't tested this.
Eric?
Yes. If you program u-boot.imx to offset 0x400, it will boot.
I just did so as shown below.
I started by placing SW1 in the 01 position (boot to USB), and used imx_usb to dowload u-boot.imx:
MX6QSABRELITE U-Boot > dhcp 10800000 192.168.0.112:u-boot.imx fec_open:Speed=100 BOOTP broadcast 1 BOOTP broadcast 2 DHCP client bound to address 29.6.1.24 Using FEC device TFTP from server 192.168.0.112; our IP address is 29.6.1.24;sending through gateway 29.6.1.1 Filename 'u-boot.imx'. Load address: 0x10800000 Loading: ######################################### done Bytes transferred = 207112 (32908 hex) MX6QSABRELITE U-Boot > sf write 0x10800000 0x400 $filesize
But above you used the network to load u-boot.imx. With imx_usb you loaded and booted an image via USB first, I assume.
<switched SW1 to BOOT mode 0 and hit the reset button here>
U-Boot 2011.12-00048-g5c30101 (Jan 19 2012 - 17:14:32) CPU: Freescale i.MX61 family rev1.0 at 792 MHz Reset cause: POR Board: MX6Q-Sabre Lite DRAM: 1 GiB WARNING: Caches not enabled MMC: FSL_SDHC: 0, FSL_SDHC: 1 MMC init failed Using default environment In: serial Out: serial Err: serial Net: FEC Hit any key to stop autoboot: 0 MX6QSABRELITE U-Boot > MX6QSABRELITE U-Boot >The imx_usb utility is available here: http://boundarydevices.com/git?p=imx_usb_loader.git
It requires libusb-1.0-0-dev to build, but has few other dependencies.
Usage is simple: hand it the file you want to execute. It will look at the header to find out where to place the image. ~/imx_usb_loader$ sudo sudo ./imx_usb u-boot.imx
Nice fallback in case the bootloader does not start. I will give it a try a.s.a.p. We actually plan to use a BDI[23]000 for that purpose.
Please note that Eric is in the process of mainlining the SPI driver for i.MX6, atm.
If you use my latest patch set, you can place the environment in SPI-NOR as well by commenting out CONFIG_ENV_IS_IN_MMC, and un-commenting ..._IN_SPI_FLASH in include/configs/mx6qsabrelite.h.
OK, that's already an excellent starting point.
Thanks.
Wolfgang.