Dear Wolfgang, I will start at the beginning, as I should have...
We will have multiple configurations of our target hardware (with/without modem, no. of uarts, PCMCIA, USB and more...). I would like the manufacturing to burn the H/W configuration and MAC to the flash, and the TQ860L probably at 0x3ff00. They will also burn u-boot, kernel, ramdisk and jffs2 partitions. We will provide a raw file for programming, and they will modify the H/W configuration and MAC area. I would like u-boot to read this data (H/W configuration and MAC) and put it into environment variables. I would like to read and modify those variables from Linux user space. We use MTD for updating the kernel, ramdisk, jffs2. But, I can not (or don't know how) the get access to the u-boot environment variables with MTD. I have an MTD patch from Nye (Zuma networks) to do exactly that, but I did not test it yet on kernel 2.4.4. So I thought to use MTD for remote update and jffs2, and your patch to busybox to get access to u-boot variables. Regarding SELF: I find it easier to use SELF. We use ELDK for development and tests, but for creating the final target images, SELF is great. We added our own applications and module and libraries from work done with ELDK like openssl and mgetty. So we updated the SELF scripts to reflect new kernel and libraries (2.2.5) and MTD from ELDK . If there is a better/easier way to get access to H/W configuration data from Linux user space I will be glad to learn. Now that I have read the README file in /tools/env I don't need the old /dev/flasha anymore - Thanks :). Thank you, Eli Brin I would like to get the H/W configuration -----Original Message----- From: Wolfgang Denk [mailto:[EMAIL PROTECTED] Sent: Monday, July 14, 2003 12:05 AM To: Eli Brin Cc: 'linuxppc-embedded at lists.linuxppc.org' Subject: Re: Access u-boot environment variables from Linux Dear Eli, in message <75DF04AC5ED4D511A9810090273CB4163F5DDD at rokonet-e.rokonet.co.il> you wrote: > > I have configure the config.mk.TQM860L_FEC file with: HAVE_FLASH_ENV = > yes. I thinkthis file is referring to a _very_ old version of the Linux kernel. You'd better use the Linux kernel and the SELF package that comes included with the ELDK, or use the top of our CVS tree. > modprobe: modprobe: Can't locate module char-major-60 > /dev/flasha: No such device > > I can see all /dev/flasha and others. > > The kernel is the default TQM860L_FEC from the ELDK (not from SELF, > but should be the same). Grrrgh... Your description gives no indication of what you're trying to do, and what you're doing. Please note, that you have two options for the flash driver: the old, non-standard character device interface [/dev/flash*] (which is there just for backward compatibility with some existing projects, and because it supports a mmap() interface), or you can use the standard MTD interface [/dev/mtd*, /dev/mtdblock*]. >From your description I think you want to use the MTD interface. The MTD interface is also what is being used the default configurations of our current kernel trees. If I guess right, you want to access /dev/mtd*, not /dev/flash* Also, judging from the subject of your posting, you should probably read the "tools/env/README" file in the U-Boot source tree. Best regards, Wolfgang Denk -- Software Engineering: Embedded and Realtime Systems, Embedded Linux Phone: (+49)-8142-4596-87 Fax: (+49)-8142-4596-88 Email: wd at denx.de A wise person makes his own decisions, a weak one obeys public opinion. -- Chinese proverb ** Sent via the linuxppc-embedded mail list. See http://lists.linuxppc.org/
