On 24/09/2012 15:48, Eric Nelson wrote: > Hi Stefano, > Hi Eric,
>> But I do not get the connection with the imximage and the need for the >> plugin. If the SOC boots with "Serial Downloader", it polls the USB OTG >> waiting for command as specified in the protocol. With your tool you set >> the registers you need and you can download the file you want, >> independently from the structure of the imxImage. >> > > The relationship is this: if we build a combined SPL image for > a universal i.MX6 U-Boot, how would it know/decide that it's > being loaded via USB and how would it support this? > > imx_usb supports plugins, so we can use it directly with that > approach. But this seems to me an implementation choice rather a constraint of the SOC. As I see in your code, imx_usb parses the iMX header making decisions according to it. Then there is a hard dependency between imx_usb and u-boot code. The other way is that they are independently, let's say, openOCD approach ;-). imx_usb could get an independent file to configure the DDR controller (for example, but it is not limited to), and then load a u-boot (or SPL, or...) where you want. Then there is no strict dependency with the imx_usb tool. The SOC allows this approach, too. Best regards, Stefano -- ===================================================================== DENX Software Engineering GmbH, MD: Wolfgang Denk & Detlev Zundel HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany Phone: +49-8142-66989-53 Fax: +49-8142-66989-80 Email: sba...@denx.de ===================================================================== _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot
