summaryrefslogtreecommitdiff
path: root/include/debug_uart.h
AgeCommit message (Collapse)Author
2017-05-11serial: omap: Support debug UARTLokesh Vutla
Add debug UART functions to permit omap specific ns16550 to provide an early debug UART. This is mostly in common with DEBUG_UART_NS16550 except for Mode definition register which is required for selecting UART mode(16x auto-baud or 13x mode). Signed-off-by: Lokesh Vutla <lokeshvutla@ti.com> Reviewed-by: Simon Glass <sjg@chromium.org> Reviewed-by: Tom Rini <trini@konsulko.com>
2017-04-12debug_uart: Try not to use stack in printchtim.chick
Spam detection software, running on the system "lists.denx.de", has identified this incoming email as possible spam. The original message has been attached to this so you can view it or label similar future email. If you have any questions, see @@CONTACT_ADDRESS@@ for details. Content preview: Previous change to create _printch causes the stack to be used, breaking printch before stack is available. Inline _printch to prevent this happening. Signed-off-by: Tim Chick <tim.chick@mediatek.com> --- [...] Content analysis details: (6.3 points, 5.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- 0.7 RCVD_IN_XBL RBL: Received via a relay in Spamhaus XBL [188.29.165.105 listed in zen.spamhaus.org] 3.6 RCVD_IN_PBL RBL: Received via a relay in Spamhaus PBL 1.6 RCVD_IN_BRBL_LASTEXT RBL: No description available. [188.29.165.105 listed in bb.barracudacentral.org] 0.4 RDNS_DYNAMIC Delivered to internal network by host with dynamic-looking rDNS Previous change to create _printch causes the stack to be used, breaking printch before stack is available. Inline _printch to prevent this happening. Signed-off-by: Tim Chick <tim.chick@mediatek.com>
2016-03-14debug_uart: output CR along with LFMasahiro Yamada
The serial output from the debug UART carries on going far to the right in the console. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> Reviewed-by: Stefan Roese <sr@denx.de> Reviewed-by: Simon Glass <sjg@chromium.org>
2015-10-21debug_uart: Add an option to announce the debug UARTSimon Glass
It is useful to see a message from the debug UART early during boot so that you know things are working. Add an option to enable this. The message will be displayed as soon as debug_uart_init() is called. Signed-off-by: Simon Glass <sjg@chromium.org> Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
2015-10-21debug_uart: Support board-specific UART initialisationSimon Glass
Some boards need to set things up before the debug UART can be used. On these boards a call to debug_uart_init() is insufficient. When this option is enabled, the function board_debug_uart_init() will be called when debug_uart_init() is called. You can put any code here that is needed to set up the UART ready for use, such as set pin multiplexing or enable clocks. Signed-off-by: Simon Glass <sjg@chromium.org> Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
2015-10-21debug_uart: Adjust the declaration of debug_uart_init()Simon Glass
We want to be able to add other common code to this function. So change the driver's version to have an underscore before it, just like _debug_uart_putc(). Define debug_uart_init() to call this version. Update all drivers to this new method. Signed-off-by: Simon Glass <sjg@chromium.org> Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
2015-07-21debug_uart: Remove use of asmlinkageSimon Glass
This does not actually help any current arch. For x86 it makes it harder to call (requires stack) and for ARM it has no effect. Drop it. Signed-off-by: Simon Glass <sjg@chromium.org>
2015-02-19serial: Support an early UART for debuggingSimon Glass
This came up in a discussion on the mailing list here: https://patchwork.ozlabs.org/patch/384613/ My concerns at the time were: - it doesn't need to be written in assembler - it doesn't need to be ARM-specific This patch provides a possible alternative. It works by allowing any serial driver to export one init function and provide a putc() function. These can be used to output debug data before the real serial driver is available. This implementation does not depend on driver model, and it is possible for it to operate without a stack on some architectures (e.g. PowerPC, ARM). It provides the same features as the ARM-specific debug.S but with more UART and architecture support. Signed-off-by: Simon Glass <sjg@chromium.org>