Signed-off-by: Wolfgang Denk <wd@denx.de> cc: Anatolij Gustschin <agust@denx.de>
Some platforms (e.g. IGEPv2 board) has a broken ns16550 UART that does not set the TEMT bit when the transmitter is empty in SPL. This makes U-Boot to hang while waiting for TEMT to be set. Add a new option to avoid this: CONFIG_SYS_NS16550_BROKEN_TEMT 16550 UART set the Transmitter Empty (TEMT) Bit when all output has finished and the transmitter is totally empty. U-Boot waits for this bit to be set to initialize the serial console. On some broken platforms this bit is not set in SPL making U-Boot to hang while waiting for TEMT. Define this option to avoid it. Signed-off-by: Javier Martinez Canillas <javier.martinez@collabora.co.uk>
Some boards want to report more than just memory size. For example, it might be useful to display the memory type (DDR2, DDR3) or manufacturer. Add a weak function to support this requirement, accessed through a new 'meminfo' command. Any example of the DRAM: output is below, just for illustration: SMDK5250 # meminfo DRAM: 2 GiB Elpida DDR3 @ 800MHz Signed-off-by: Simon Glass <sjg@chromium.org>
This option displays board info after stdio is running, so that it will appear on the LCD. If it is displayed earlier, the board info will appear on the serial console but not on the LCD. Here follows a blow-by-blow description. 1a. Without CONFIG_DISPLAY_BOARDINFO_LATE, on serial: U-Boot 2011.12-02550-g037e1c5-dirty (Nov 15 2012 - 14:29:42) for SMDK5250 CPU: S5PC520 @ 1700MHz Board: Google Snow, rev 0 I2C: ready DRAM: 2 GiB Elpida DDR3 @ 800MHz MMC: S5P MSHC0: 0, S5P MSHC1: 1 SF: Detected W25Q32 with page size 4 KiB, total 4 MiB *** Warning - bad CRC, using default environment In: mkbp-keyb Out: lcd Err: lcd Net: No ethernet found. Hit any key to stop autoboot: 0 SMDK5250 # 1b. Without CONFIG_DISPLAY_BOARDINFO_LATE, on LCD (note machine info is missing): In: mkbp-keyb Out: lcd Err: lcd Net: No ethernet found. Hit any key to stop autoboot: 0 SMDK5250 # 2a. With CONFIG_DISPLAY_BOARDINFO_LATE, on serial: U-Boot 2011.12-02550-g037e1c5 (Nov 15 2012 - 14:27:40) for SMDK5250 CPU: S5PC520 @ 1700MHz I2C: ready DRAM: 2 GiB Elpida DDR3 @ 800MHz MMC: S5P MSHC0: 0, S5P MSHC1: 1 SF: Detected W25Q32 with page size 4 KiB, total 4 MiB *** Warning - bad CRC, using default environment Model: Google Snow In: mkbp-keyb Out: lcd Err: lcd Net: No ethernet found. Hit any key to stop autoboot: 0 SMDK5250 # 2b. With CONFIG_DISPLAY_BOARDINFO_LATE, on LCD (note machine info is present): Model: Google Snow In: mkbp-keyb Out: lcd Err: lcd Net: No ethernet found. Hit any key to stop autoboot: 0 SMDK5250 # Since the LCD is all that a typical user sees, it is useful to display the model there. We may be able to rearrange things some other way one day, but at present this seems like a convenient way of getting the required behaviour. Signed-off-by: Simon Glass <sjg@chromium.org>
Add a short note about this in the README. Signed-off-by: Simon Glass <sjg@chromium.org>
This option delays loading of the environment until later, so that only the default environment will be available to U-Boot. This can address the security risk of untrusted data being used during boot. Any time you load untrusted data you expose yourself to a bug in the code. The attacker gets to choose the data so can sometimes carefully craft it to exploit a bug. We try to avoid touching user-controlled data during a verified boot unless strictly necessary. Since the default environment is good enough in this case (or you would just change it), this gets around the problem by just not loading the environment. When CONFIG_DELAY_ENVIRONMENT is defined, it is convenient to have a run-time way of enabling loading of the environment. Add this to the fdt as /config/delay-environment. Note: This patch depends on http://patchwork.ozlabs.org/patch/194342/ Signed-off-by: Doug Anderson <dianders@chromium.org> Signed-off-by: Simon Glass <sjg@chromium.org> Reviewed-by: Doug Anderson <dianders@chromium.org>
It is useful to have a basic SPI flash test, which tests that the SPI chip, the SPI bus and the driver are behaving. This test erases part of the flash, writes data and reads it back as a sanity check that all is well. Use CONFIG_SF_TEST to enable it. Signed-off-by: Simon Glass <sjg@chromium.org>