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* sandbox: Add improved RAM simulationMatthias Weisser2011-12-10-3/+0
| | | | | | | | | Using mmap to allocate memory from the OS for RAM simulation we can use u-boot own malloc implementation. Tested-by: Simon Glass <sjg@chromium.org> Signed-off-by: Matthias Weisser <weisserm@arcor.de> Signed-off-by: Mike Frysinger <vapier@gentoo.org>
* Add a cli command to test the TPM device.Vadim Bendebury2011-12-06-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | The command gets an arbitrary number of arguments (up to 30), which are interpreted as byte values and are feed into the TPM device after proper initialization. Then the return value and data of the TPM driver is examined. TPM commands are described in the TCG specification. For instance, the following sequence is the 'TPM Startup' command, it is processed by the TPM and a response is generated: boot > tpm 0x0 0xc1 0x0 0x0 0x0 0xc 0x0 0x0 0x0 0x99 0x0 0x1 Found TPM SLB9635 TT 1.2 by Infineon Got TPM response: 00 c4 00 00 00 0a 00 00 00 00 If the command is corrupted (fed one byte short), an error is reported: boot > tpm 0x0 0xc1 0x0 0x0 0x0 0xc 0x0 0x0 0x0 0x99 0x0 generic_lpc_tpm.c:311 unexpected TPM status 0xff000888 generic_lpc_tpm.c:516 failed sending data to TPM tpm command failed boot > Change-Id: I3f3c5bfec8b852e208c4e99ba37b0f2b875140b0 Signed-off-by: Vadim Bendebury <vbendeb@chromium.org> CC: Wolfgang Denk <wd@denx.de>
* omap: spl: fix build break due to changes in FATAneesh V2011-10-27-0/+1
| | | | | | | | | | | | | | FAT library now uses malloc() and free(). But SPL doesn't have heap until now. Setup a heap in SDRAM to fix this issue. However this increases SPL footprint beyond the available SRAM budget. So, compile out some fancy features in the SDARM init bring back footprint under control CC: Sandeep Paulraj <s-paulraj@ti.com> CC: Wolfgang Denk <wd@denx.de> Signed-off-by: Aneesh V <aneesh@ti.com> Signed-off-by: Sandeep Paulraj <s-paulraj@ti.com>
* sandbox: Disable built-in mallocSimon Glass2011-10-17-0/+2
| | | | | | | We prefer to U-Boot's malloc but for now it is easier to use the C library's version. Signed-off-by: Simon Glass <sjg@chromium.org>
* Add pxe commandJason Hobbs2011-10-17-0/+1
| | | | | | | | | | | | Add pxe command, which is intended to mimic PXELINUX functionality. 'pxe get' uses tftp to retrieve a file based on UUID, MAC address or IP address. 'pxe boot' interprets the contents of PXELINUX config like file to boot using a specific initrd, kernel and kernel command line. This patch also adds a README.pxe file - see it for more details on the pxe command. Signed-off-by: Jason Hobbs <jason.hobbs@calxeda.com>
* Add generic, reusable menu codeJason Hobbs2011-10-17-0/+1
| | | | | | | This will be used first by the pxe code, but is intended to be generic and reusable for other jobs in U-boot. Signed-off-by: Jason Hobbs <jason.hobbs@calxeda.com>
* cmd_time: add time commandChe-liang Chiou2011-10-09-0/+1
| | | | | | | | | | | | | | | The 'time' command runs and reports execution time of commands. Sample usage: -------------------- u-boot# time crc 0x1000 1000 CRC32 for 00001000 ... 00001fff ==> ae94dc4b time: 0.004 seconds, 4 ticks -------------------- Signed-off-by: Che-Liang Chiou <clchiou@chromium.org> Acked-by: Mike Frysinger <vapier@gentoo.org>
* powerpc/mpc83xx: Migrate from spd_sdram to unified DDR driverYork Sun2011-09-29-1/+7
| | | | | | | | | | | | | | | | | Unified DDR driver is maintained for better performance, robustness and bug fixes. Upgrading to use unified DDR driver for MPC83xx takes advantage of overall improvement. It requires changes for board files to customize platform-dependent parameters. To utilize the unified DDR driver, a board needs to define CONFIG_FSL_DDRx in the header file. No more boards will be accepted without such definition. Note: the workaround for erratum DDR6 for the very old MPC834x Rev 1.0/1.1 and MPC8360 Rev 1.1/1.2 parts is not migrated to unified driver. Signed-off-by: Kim Phillips <kim.phillips@freescale.com> Signed-off-by: York Sun <yorksun@freescale.com> Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
* led: added cmd_led to MakefileJason Kridner2011-09-04-0/+1
| | | | | | | | | | Addition of cmd_led into the Makefile wasn't included in the patch applied to u-boot-ti. Signed-off-by: Jason Kridner <jkridner@beagleboard.org> Signed-off-by: Koen Kooi <koen@dominion.thruhere.net> Signed-off-by: Joel A Fernandes <agnel.joel@gmail.com> Signed-off-by: Sandeep Paulraj <s-paulraj@ti.com>
* add command fitupd to run an update from a FIT imageAndreas Pretzsch2011-07-26-0/+1
| | | | | | | | | | | | Command calls update_tftp() analogous to automatic update described in doc/README.update. Usage: fitupd [addr] - run update from FIT image at addr or from tftp 'updatefile' Signed-off-by: Andreas Pretzsch <apr@cn-eng.de>
* scaled down version of generic libraries for SPLAneesh V2011-07-26-3/+6
| | | | Signed-off-by: Aneesh V <aneesh@ti.com>
* ARM: drop unsupported 'trab' boardWolfgang Denk2011-06-22-1/+0
| | | | | | | | | | The 'trab' board configuration is broken, and there is nobody who is interested and willing to fix it. Drop it. This includes support for VFD displays which have always been used by this board only. Signed-off-by: Wolfgang Denk <wd@denx.de>
* Merge branch 'phylib' of git://git.denx.de/u-boot-mmcWolfgang Denk2011-04-20-0/+4
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| * Add mdio command for new PHY infrastructureAndy Fleming2011-04-20-0/+3
| | | | | | | | | | | | | | | | | | | | | | The new mdio command doesn't have all of the features of the mii command, but it provides the necessary read/write primitives, and allows users to interact with 10G PHYs, and other PHYs which use Clause 45 of 802.3. This means that the mdio command requires a "Device Address" argument, though for clause 22 PHYs, the argument can be "-". Signed-off-by: Andy Fleming <afleming@freescale.com> Acked-by: Detlev Zundel <dzu@denx.de>
| * Create PHY Lib for U-BootAndy Fleming2011-04-20-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Extends the mii_dev structure to participate in a full-blown MDIO and PHY driver scheme. The mii_dev structure and miiphy calls are modified in such a way to allow the original mii command and miiphy infrastructure to work as before, but also to support a new set of APIs which allow (among other things) sharing of PHY driver code and 10G support The mii command will continue to support normal PHY management functions (Clause 22 of 802.3), but will not be changed to support 10G (Clause 45). The basic design is similar to PHY Lib from Linux, but simplified for U-Boot's network and driver infrastructure. We now have MDIO drivers and PHY drivers An MDIO driver provides: read write reset A PHY driver provides: (optionally): probe config - initial setup, starting of auto-negotiation startup - waiting for AN, and reading link state shutdown - any cleanup needed The ethernet drivers interact with the PHY Lib using these functions: phy_connect() phy_config() phy_startup() phy_shutdown() Each PHY driver can be configured separately, or all at once using config_phylib_all_drivers.h (added in the patch which adds the drivers) We also provide generic drivers for Clause 22 (10/100/1000), and Clause 45 (10G) PHYs. We also implement phy_reset(), and call it in phy_connect(). Because phy_reset() is essentially the same as miiphy_reset, but: a) must support 10G PHYs, and b) should use the phylib primitives, we implement miiphy_reset, using phy_reset(), but only when CONFIG_PHYLIB is set. Otherwise, we just use the old version. In this way, we save on compile size, even if we don't manage to save code size. Pulled ethtool.h and mdio.h from: git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next-2.6 782d640afd15af7a1faf01cfe566ca4ac511319d With many, many deletions so as to enable compilation under u-boot Signed-off-by: Andy Fleming <afleming@freescale.com> Signed-off-by: Kumar Gala <galak@kernel.crashing.org> Acked-by: Detlev Zundel <dzu@denx.de>
* | Merge branch 'misc' of git://git.denx.de/u-boot-blackfinWolfgang Denk2011-04-20-0/+4
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| * | gpio: generalize for all generic gpio providersMike Frysinger2011-04-13-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The Blackfin gpio command isn't terribly Blackfin-specific. So generalize the few pieces into two new optional helpers: name_to_gpio() - turn a string name into a GPIO # gpio_status() - display current pin bindings (think /proc/gpio) Once these pieces are pulled out, we can relocate the cmd_gpio.c into the common directory. Signed-off-by: Mike Frysinger <vapier@gentoo.org>
| * | md5sum/sha1sum/unzip: split out of mondo mem fileMike Frysinger2011-04-13-0/+3
| |/ | | | | | | | | | | | | | | There's no real need to keep these functions in the cmd_mem file since they do not use any of the common global mem variables. So split them out into their own dedicated cmd files. Signed-off-by: Mike Frysinger <vapier@gentoo.org>
* | mmc: add generic mmc spi driverThomas Chou2011-04-13-0/+1
|/ | | | | | | | | | | | | This patch supports mmc/sd card with spi interface. It is based on the generic mmc framework. It works with SDHC and supports multi blocks read/write. The crc checksum on data packet is enabled with the def, There is a subcomamnd "mmc_spi" to setup spi bus and cs at run time. Signed-off-by: Thomas Chou <thomas@wytron.com.tw> Signed-off-by: Andy Fleming <afleming@freescale.com>
* Blackfin: ldrinfo: new commandMike Frysinger2011-04-08-0/+1
| | | | | | Simple command to decode/check an LDR image before we try to boot it. Signed-off-by: Mike Frysinger <vapier@gentoo.org>
* config_cmd_defaults.h: new header for common u-boot command defaultsMike Frysinger2011-01-09-1/+1
| | | | | | | | | | | | | We have config_defaults.h which are random configuration settings that everyone gets by default. We also have config_cmd_default.h which is a recommended list of defaults but boards have to opt into. Now we have config_cmd_defaults.h which is a list of defaults that everyone gets and has to actively opt out of. For now, we populate it with the bootm command which previously was unable to be disabled. Signed-off-by: Mike Frysinger <vapier@gentoo.org>
* common/Makefile: don't include env_embedded.o into libcommonWolfgang Denk2010-11-26-7/+7
| | | | | | | | | | Some boards use an embedded environment, where env_embedded.o has to be linked at a special position in the U-Boot image; to make this possible, we do not include it into libcommon.o for such boards. Signed-off-by: Mike Frysinger <vapier@gentoo.org> Signed-off-by: Wolfgang Denk <wd@denx.de> Acked-by: Stefan Roese <sr@denx.de>
* Switch from archive libraries to partial linkingSebastien Carlier2010-11-17-2/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | Before this commit, weak symbols were not overridden by non-weak symbols found in archive libraries when linking with recent versions of binutils. As stated in the System V ABI, "the link editor does not extract archive members to resolve undefined weak symbols". This commit changes all Makefiles to use partial linking (ld -r) instead of creating library archives, which forces all symbols to participate in linking, allowing non-weak symbols to override weak symbols as intended. This approach is also used by Linux, from which the gmake function cmd_link_o_target (defined in config.mk and used in all Makefiles) is inspired. The name of each former library archive is preserved except for extensions which change from ".a" to ".o". This commit updates references accordingly where needed, in particular in some linker scripts. This commit reveals board configurations that exclude some features but include source files that depend these disabled features in the build, resulting in undefined symbols. Known such cases include: - disabling CMD_NET but not CMD_NFS; - enabling CONFIG_OF_LIBFDT but not CONFIG_QE. Signed-off-by: Sebastien Carlier <sebastien.carlier@gmail.com>
* Save environment data to mmc.Terry Lv2010-09-19-0/+1
| | | | | | | | This patch is to save environment data to mmc card. It uses interfaces defined in generic mmc. Signed-off-by: Terry Lv <r65388@freescale.com> Acked-by: Stefano Babic <sbabic@denx.de>
* CRAMFS: support cramfs in RAMHeiko Schocher2010-01-18-0/+1
| | | | | | | | | | | | | cramfsls and cramfsload are added to the command list. A cramfs placed at 'cramfs_addr' can the be listed with 'cramfsls' and files can be loaded with 'cramfsload'. 'cramfs_addr' is an environment variable specifying the address the cramfs is located. This works for powerpc and for ARM. Use CONFIG_CMD_CRAMFS. Signed-off-by: Andreas Huber <andreas.huber@keymile.com> Signed-off-by: Heiko Schocher <hs@denx.de>
* kgdb: add default generic stubsRobin Getz2010-01-18-1/+1
| | | | | | | | | The default kgdb functions can be implemented with common U-Boot functions, so rather than force everyone to copy & paste these things, create a set of weak stubs. Signed-off-by: Robin Getz <robin.getz@analog.com> Signed-off-by: Mike Frysinger <vapier@gentoo.org>
* Merge branch 'master' into nextWolfgang Denk2009-12-05-1/+0
|\ | | | | | | | | | | | | | | Conflicts: board/esd/plu405/plu405.c drivers/rtc/ftrtc010.c Signed-off-by: Wolfgang Denk <wd@denx.de>
| * circbuf: Move to lib_generic and conditionally compilePeter Tyser2009-12-02-1/+0
| | | | | | | | | | | | | | circbuf could be used as a generic library and is only currently needed when CONFIG_USB_TTY is defined. Signed-off-by: Peter Tyser <ptyser@xes-inc.com>
* | command.c: Break commands out to appropriate cmd_*.c filesPeter Tyser2009-11-23-0/+5
| | | | | | | | | | | | | | command.c should contain common code related to commands, not miscellaneous command implementations. Signed-off-by: Peter Tyser <ptyser@xes-inc.com>
* | cmd_nand: Move conditional compilation to MakefilePeter Tyser2009-11-13-1/+1
|/ | | | Signed-off-by: Peter Tyser <ptyser@xes-inc.com>
* Revert "env: only build env_embedded and envcrc when needed"Wolfgang Denk2009-10-27-0/+3
| | | | | | Breaks building on many boards, and no really clean fix available yet. This reverts commit 6dab6add2d8ee80905234b326abc3de11be1d178.
* env: only build env_embedded and envcrc when neededMike Frysinger2009-10-18-3/+0
| | | | | | | | | | | | | The env code is protected by the ENV_IS_EMBEDDED define, so attempting to compile the code when this isn't defined is pointless. Now that the env headers have unified around CONFIG_ENV_IS_EMBEDDED, convert the build system to only build the env objects when this is enabled. And now that the env code is conditionally compiled, we can drop the source code checks. For people who want to extract the environment manually, add a new option CONFIG_BUILD_ENVCRC that only enables the envcrc utility. Signed-off-by: Mike Frysinger <vapier@gentoo.org>
* Add support for the Tundra TSI148 VME-bridgeReinhard Arlt2009-07-19-0/+1
| | | | | | | | | | From: Reinhard Arlt <reinhard.arlt@esd-electronics.com> This patch adds support for the Tundra TSI148 VME-bridge. It's used on the upcoming esd VME8349 board. Signed-off-by: Reinhard Arlt <reinhard.arlt@esd-electronics.com> Signed-off-by: Stefan Roese <sr@denx.de>
* Merge branch 'master' of git://git.denx.de/u-boot-nand-flashWolfgang Denk2009-07-19-2/+0
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| * Remove legacy NAND and disk on chip code.Scott Wood2009-07-16-2/+0
| | | | | | | | | | | | | | | | | | | | | | | | | | Legacy NAND had been scheduled for removal. Any boards that use this were already not building in the previous release due to an #error. The disk on chip code in common/cmd_doc.c relies on legacy NAND, and it has also been removed. There is newer disk on chip code in drivers/mtd/nand; someone with access to hardware and sufficient time and motivation can try to get that working, but for now disk on chip is not supported. Signed-off-by: Scott Wood <scottwood@freescale.com>
* | stdio/device: rework function naming conventionJean-Christophe PLAGNIOL-VILLARD2009-07-18-1/+1
|/ | | | | | | | | | | | | | | | | | | | | | | | | | | | | So far the console API uses the following naming convention: ======Extract====== typedef struct device_t; int device_register (device_t * dev); int devices_init (void); int device_deregister(char *devname); struct list_head* device_get_list(void); device_t* device_get_by_name(char* name); device_t* device_clone(device_t *dev); ======= which is too generic and confusing. Instead of using device_XX and device_t we change this into stdio_XX and stdio_dev This will also allow to add later a generic device mechanism in order to have support for multiple devices and driver instances. Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com> Edited commit message. Signed-off-by: Wolfgang Denk <wd@denx.de>
* Add simple hwconfig infrastructureAnton Vorontsov2009-07-16-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch implements simple hwconfig infrastructure: an interface for software knobs to control a hardware. This is very simple implementation, i.e. it is implemented via `hwconfig' environment variable. Later we could write some "hwconfig <enable|disable|list>" commands, ncurses interface for Award BIOS-like interface, and frame-buffer interface for AMI GUI[1] BIOS-like interface with mouse support[2]. Current implementation details/limitations: 1. Doesn't support options dependencies and mutual exclusion. We can implement this by integrating apt-get[3] into the u-boot. But I didn't bother yet. 2. Since we don't implement hwconfig command, i.e. we're working with the environement directly, there is no way to tell that toggling a particular option will need a reboot to take an effect. So, for now it's advised to always reboot the target after modifying hwconfig variable. 3. We support hwconfig options with arguments. For example, set hwconfig dr_usb:mode=peripheral,phy_type=ulpi That means: - dr_usb - enable Dual-Role USB controller; - dr_usb:mode=peripheral - USB in Function mode; - dr_usb:phy_type=ulpi - USB should work with ULPI PHYs; The purpose of this simple implementation is to define some internal API and then we can continue improving user experience by adding more mature interface, like hwconfig command with bells and whistles. Or not adding, if we feel that current interface fits its needs. [1] http://en.wikipedia.org/wiki/American_Megatrends [2] Regarding ncurses and GUI with mouse support -- I'm just kidding. [3] The comment regarding apt-get is also a joke, meaning that dependency tracking could be non-trivial. For example, for enabling HW feature X we may need to disable Y, and turn Z into reduced mode (like RMII-only interface for ethernet, no MII). It's quite trivial to implement simple cases though. Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com> Acked-by: Kim Phillips <kim.phillips@freescale.com>
* Blackfin: new spibootldr commandMike Frysinger2009-06-14-0/+1
| | | | | | | Newer Blackfin parts can an on-chip ROM that can boot LDRs over SPI flashes, so add a new 'spibootldr' command to take advantage of it. Signed-off-by: Mike Frysinger <vapier@gentoo.org>
* Add support for Linux-like kallsysmsMike Frysinger2009-06-12-0/+1
| | | | | | | The kernel stores address<->symbol names in it so things can be decoded at runtime. Do it in U-Boot, and we get nice symbol decoding when crashing. Signed-off-by: Mike Frysinger <vapier@gentoo.org>
* make MODEM SUPPORT generic instead of duplicate itJean-Christophe PLAGNIOL-VILLARD2009-06-12-0/+1
| | | | | | | | | | and fix comment Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com> Adjusted Copyright message. Signed-off-by: Wolfgang Denk <wd@denx.de>
* One more fix for building env_embedded.oWolfgang Denk2009-04-05-0/+2
| | | | | | | | In addition to the changes for CONFIG_ENV_IS_IN_FLASH as done in commit afcbce07, we also need to do the same for CONFIG_ENV_IS_IN_EEPROM and CONFIG_ENV_IS_IN_NVRAM. Signed-off-by: Wolfgang Denk <wd@denx.de>
* add dataflash mmc mux missing supportJean-Christophe PLAGNIOL-VILLARD2009-04-04-0/+1
| | | | Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
* Fix building of env_embedded.oWolfgang Denk2009-04-04-0/+1
| | | | | | | | | | | Since commit a706bfc7 common/env_embedded.o and tools/envcrc were only built when CONFIG_ENV_IS_EMBEDDED was set, but this breaks building for many boards. We always have to build these files when CONFIG_ENV_IS_IN_FLASH is set. Signed-off-by: Wolfgang Denk <wd@denx.de>
* common/Makefile: Conditionally compile env_embedded.oPeter Tyser2009-04-04-1/+1
| | | | Signed-off-by: Peter Tyser <ptyser@xes-inc.com>
* mflash: Initial mflash supportunsik Kim2009-04-03-0/+2
| | | | | | | | | | | | | | | | | | | | Mflash is fusion memory device mainly targeted consumer eletronic and mobile phone. Internally, it have nand flash and other hardware logics and supports some different operation (ATA, IO, XIP) modes. IO mode is custom mode for the host that doesn't have IDE interface. (Many mobile targeted SoC doesn't have IDE bus) This driver support mflash IO mode. Followings are brief descriptions about IO mode. 1. IO mode based on ATA protocol and uses some custom command. (read confirm, write confirm) 2. IO mode uses SRAM bus interface. Signed-off-by: unsik Kim <donari75@gmail.com>
* Add "source" command; prepare removal of "autoscr" commandWolfgang Denk2009-04-03-2/+2
| | | | | | | | | | | | | | | | | | | | | According to the doc/feature-removal-schedule.txt, the "autoscr" command will be replaced by the "source" command in approximately 6 months from now. This patch prepares this change and starts a 6 month transition period as follows: - The new "source" command has been added, which implements exactly the same functionlaity as the old "autoscr" command before - The old "autoscr" command name is kept as an alias for compatibility - Command sequences, script files atc. have been adapted to use the new "source" command - Related environment variables ("autoscript", "autoscript_uname") have *not* been adapted yet; these will be renamed resp. removed in a separate patch when the support for the "autoscr" command get's finally dropped. Signed-off-by: Wolfgang Denk <wd@denx.de>
* UBIFS: Add UBIFS commandsStefan Roese2009-03-20-0/+1
| | | | | | | | | | | | | | | This patchset adds these UBIFS related commands: - ubifsmount Mount an UBIFS volume - ubifsls List a directory of the mounted UBIFS volume - ubifsload Load a file from the mounted UBIFS volume to memory Signed-off-by: Stefan Roese <sr@denx.de>
* Separate mtdparts command from jffs2Stefan Roese2009-03-20-0/+1
| | | | | | | | | | | Currently the mtdparts commands are included in the jffs2 command support. This doesn't make sense anymore since other commands (e.g. UBI) use this infrastructure as well now. This patch separates the mtdparts commands from the jffs2 commands making it possible to only select mtdparts when no JFFS2 support is needed. Signed-off-by: Stefan Roese <sr@denx.de> Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
* common/{hush, kgdb, serial}.c: build by COBJS-$(...) in MakefileMike Frysinger2009-02-11-3/+3
| | | | | | | | Move global '#ifdef CONFIG_xxx .... #endif' out of the .c files and into the COBJS-$(CONFIG_xxx) in the Makefile. Also delete unused var in kgdb code in the process. Signed-off-by: Mike Frysinger <vapier@gentoo.org>
* IOMUX: Add console multiplexing support.Gary Jennejohn2008-12-07-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | Modifications to support console multiplexing. This is controlled using CONFIG_SYS_CONSOLE_MUX in the board configuration file. This allows a user to specify multiple console devices in the environment with a command like this: setenv stdin serial,nc. As a result, the user can enter text on both the serial and netconsole interfaces. All devices - stdin, stdout and stderr - can be set in this manner. 1) common/iomux.c and include/iomux.h contain the environment setting implementation. 2) doc/README.iomux contains a somewhat more detailed description. 3) The implementation in (1) is called from common/cmd_nvedit.c to handle setenv and from common/console.c to handle initialization of input/output devices at boot time. 4) common/console.c also contains the code needed to poll multiple console devices for input and send output to all devices registered for output. 5) include/common.h includes iomux.h and common/Makefile generates iomux.o when CONFIG_SYS_CONSOLE_MUX is set. Signed-off-by: Gary Jennejohn <garyj@denx.de>
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