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7 Commits

Author SHA1 Message Date
niruiyu e5010d30f4 When SerialPortWrite() is called with a non-NULL Buffer and NumberOfBytes is passed in as 0, just do a flush. 
Signed-off-by: Ruiyu Ni<ruiyu.ni@intel.com>
Reviewed-by: Kinney Michael D<michael.d.kinney@intel.com>

git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@13708 6f19259b-4bc3-4df7-8a09-765794883524
 2012-09-10 02:32:45 +00:00
mdkinney acaa2726fb Add description for 64-byte FIFO enable bit for PcdSerialFifoControl. 
Update SerialPortInitializer() to properly preserve BIT5 in FCR instead of BIT4.


git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@11404 6f19259b-4bc3-4df7-8a09-765794883524
 2011-03-16 02:58:51 +00:00
mdkinney 784ce12727 1) Add PcdSerialDetectCable to MdeModulePkg to enable/disable cable detection if hardware flow control is enabled. The default is to not perform cable detection. 
2) Update BaseSerialPortLib16550 to use this new PCD.

This addresses an issue that was introduced on Feb 3, 2011 when all references to Carrier Detect(CD) were removed from the BaseSerialPortLib16550.  When that change was made, a target would block on the first Tx operation if hardware flow control was enabled and no cable or serial application was running on a host. Now the behavior when no cable is connected or no serial app is running on the host is controlled through a PCD.  The default is for the target to continue execution even if there is no cable or serial app running.  If PcdSerialDetectCable is set to TRUE, then the target will block on any transmit that does not have a cable connected or a serial app running in the host.

If hardware flow control is disabled, then this update will have no impact on behavior.


git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@11301 6f19259b-4bc3-4df7-8a09-765794883524
 2011-02-10 23:27:12 +00:00
mdkinney db662a64a6 Clean up BaseSerialPortLib16550 to remove references and checks for Carrier Detect(CD). This is not required for this library implementation. The only signals used for Hardware Flow Control are RTS/CTS. 
git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@11300 6f19259b-4bc3-4df7-8a09-765794883524
 2011-02-04 01:19:59 +00:00
mdkinney e25fb2c06c Add missing @param to function header comment. 
git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@11203 6f19259b-4bc3-4df7-8a09-765794883524
 2010-12-27 17:16:55 +00:00
mdkinney f2ad949723 Fix ICC build issues 
git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@11185 6f19259b-4bc3-4df7-8a09-765794883524
 2010-12-20 01:32:07 +00:00
mdkinney 467d15ae63 Add generic SerialPortLib instance for 16550 UARTs configured through PCDs. Depends on new library class called PlatformHookLib to perform platform specific initialization of the UART. 
Add PlatformHookLib.h that defines the PlatformHookLib class
Add PlatformHookLibNull instance that is a Null implementation of the PlatformHookLib class





git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@11184 6f19259b-4bc3-4df7-8a09-765794883524
 2010-12-18 01:02:59 +00:00