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From 6c10adb53d3247f65e5d9399290e6b8e7962cdef Mon Sep 17 00:00:00 2001
From: Jae Hyun Yoo <jae.hyun.yoo@intel.com>
Date: Wed, 28 Apr 2021 17:19:50 -0700
Subject: [PATCH] Add UART routing logic into host console connection flow
Switching UART routing when starting obmc-service introduces garbled
character printing out on physical host serial output and it's
inevitable so this commit moves the routing logic into host console
connection flow in bmcweb to avoid the issue until SOL is actually
activated.
Tested: The garbled character printing out was not observed during
BMC booting. SOL worked well.
Signed-off-by: Jae Hyun Yoo <jae.hyun.yoo@intel.com>
---
include/obmc_console.hpp | 19 +++++++++++++++++++
1 file changed, 19 insertions(+)
diff --git a/include/obmc_console.hpp b/include/obmc_console.hpp
index cdb19901e82d..9c4ae8821074 100644
--- a/include/obmc_console.hpp
+++ b/include/obmc_console.hpp
@@ -22,6 +22,9 @@ static boost::container::flat_set<crow::websocket::Connection*> sessions;
static bool doingWrite = false;
+constexpr char const* uartMuxCtrlPath = "/sys/bus/platform/drivers/aspeed-uart-routing/1e78909c.uart_routing/raw";
+constexpr char const* uartMuxCtrlVal = "0x03450003";
+
inline void doWrite()
{
if (doingWrite)
@@ -110,6 +113,22 @@ inline void connectHandler(const boost::system::error_code& ec)
return;
}
+ FILE* file = fopen(uartMuxCtrlPath, "w");
+ if (file != nullptr)
+ {
+ int rc = fputs(uartMuxCtrlVal, file);
+ fclose(file);
+ if (rc < 0)
+ {
+ BMCWEB_LOG_ERROR << "Couldn't change UART routing: " << rc;
+ for (crow::websocket::Connection* session : sessions)
+ {
+ session->close("Error in connecting to host port");
+ }
+ return;
+ }
+ }
+
doWrite();
doRead();
}
--
2.17.1
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