From mboxrd@z Thu Jan 1 00:00:00 1970 From: Michael Trimarchi Date: Fri, 17 May 2013 05:39:22 +0200 Subject: [U-Boot] u-boot USB question In-Reply-To: <51959E2E.1080408@atmel.com> References: <51958652.7030501@atmel.com> <51959E2E.1080408@atmel.com> Message-ID: <5195A66A.2050401@amarulasolutions.com> List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: u-boot@lists.denx.de Hi On 17/05/13 05:04, Bo Shen wrote: > Hi Lance, > > On 5/17/2013 10:20, Lance Beck wrote: >> Thanks Bo! >> >> My thinking with fw_printev (setenv) was that I would use it to set the environment variables from our user space app. This way, we can control when the USB stick will be used for a kernel or rootfs upgrade. Any thoughts on show this could be scripted and run? We would like to be able to have a customer in the field do this without having to do anything but send a command from the user app, insert the USB drive and reboot. > If the cpu doesn't have any register for rebooting reason, you can write in environment a variable that said that you want update at the next reboot and then using and autoscript you can flash it Michael > Maybe you can test reference in > ---8>--- > #define CONFIG_EXTRA_ENV_SETTINGS \ > "loadaddr=0x82000000\0" \ > "console=ttyO2,115200n8\0" \ > "mmcdev=0\0" \ > "mmcargs=setenv bootargs console=${console} " \ > "root=/dev/mmcblk0p2 rw rootwait\0" \ > "nandargs=setenv bootargs console=${console} " \ > "root=/dev/mtdblock4 rw " \ > "rootfstype=jffs2\0" \ > "loadbootscript=fatload mmc ${mmcdev} ${loadaddr} boot.scr\0" \ > "bootscript=echo Running bootscript from mmc ...; " \ > "source ${loadaddr}\0" \ > "loaduimage=fatload mmc ${mmcdev} ${loadaddr} uImage\0" \ > "mmcboot=echo Booting from mmc ...; " \ > "run mmcargs; " \ > "bootm ${loadaddr}\0" \ > "nandboot=echo Booting from nand ...; " \ > "run nandargs; " \ > "nand read ${loadaddr} 280000 400000; " \ > "bootm ${loadaddr}\0" \ > > #define CONFIG_BOOTCOMMAND \ > "mmc dev ${mmcdev}; if mmc rescan; then " \ > "if run loadbootscript; then " \ > "run bootscript; " \ > "else " \ > "if run loaduimage; then " \ > "run mmcboot; " \ > "else run nandboot; " \ > "fi; " \ > "fi; " \ > "else run nandboot; fi" > ---<8--- > > Best Regards, > Bo Shen > _______________________________________________ > U-Boot mailing list > U-Boot at lists.denx.de > http://lists.denx.de/mailman/listinfo/u-boot