Hi Prafulla Wadashar Prafulla Wadaskar wrote: >>> >>> I am going to start "boot from USB Support" development for >> kirkwood. >> what this "boot from USB Support" means? > Dear Xiangfu Liu > To my development "Boot from USB Support" means, fetching kernel and rfs > binaries from the file system/partition on storage connected on USB interface.
sounds good. > There will be native u-boot on NAND or SPI flash that will bring up the system > In the auto boot sequence through h/w triggers on the board like > pushbutton/reset key we can initiate bootcmd for "boot_from_USB" > For this I need to support h/w driver for Kirkwood and u-boot USB framework. > > This is one of good standalone method to recover system using USB interface > (similar to pxeboot) > in case of small embedded systems it would be very useful. yes, agree. > > FYI: Kirkwood h/w supports Boot from SF/NANDF/SATA/PEX/UART but not USB :-) > as you referenced for JZ4740 > > Regards.. > Prafulla . . > >> I know "boot from nand", >> and I know that the Ingenic CPU, support "boot from USB". is >> the same meaning? >> >> here is part of JZ4740 cpu data sheet [1] >> -- >> 3.7.3 BOOT >> Jz4740 support 3 different boot sources depending on >> BOOT_SEL0 and BOOT_SEL1 pin values. >> Table 3-29 lists them. >> Table 3-29 Boot from 3 boot sources >> >> BOOT_SEL1 BOOT_SEL0 Boot Source >> 0 0 Boot from NOR flash at CS4 >> 0 1 Boot from USB device >> 1 0 Boot from 512 page NAND flash at CS1 >> 1 1 Boot from 2k page NAND flash at CS1 >> -- >> >> [1] ftp://ftp.ingenic.cn/2soc/Jz4740_ds.pdf >> -- Best Regards Xiangfu Liu jabber : xiangf...@gmail.com skype : xiangfu.z _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot
