[platforms: PATCH v3 07/10] Marvell/Drivers: Pp2Dxe: Change settings for the always-up link

[Marcin Wojtas <mw@semihalf.com>]

Currently initial forcing link status happened for all ports, not only
marked as 'always-up'. Although this didn't actually matter for the MAC
settings, because MAC is automatically updated with PHY HW polling
feature of the controller, perform mv_gop110_fl_cfg only when
the appropriate flag is true. Also in such case, force the link as up,
using a new library routine.

Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Marcin Wojtas <mw@semihalf.com>
---
 Platform/Marvell/Drivers/Net/Pp2Dxe/Mvpp2Lib.c | 19 +++++++++++++++++++
 Platform/Marvell/Drivers/Net/Pp2Dxe/Mvpp2Lib.h |  5 +++++
 Platform/Marvell/Drivers/Net/Pp2Dxe/Pp2Dxe.c   |  6 +++++-
 3 files changed, 29 insertions(+), 1 deletion(-)

diff --git a/Platform/Marvell/Drivers/Net/Pp2Dxe/Mvpp2Lib.c b/Platform/Marvell/Drivers/Net/Pp2Dxe/Mvpp2Lib.c
index 53154db..0c9f00c 100644
--- a/Platform/Marvell/Drivers/Net/Pp2Dxe/Mvpp2Lib.c
+++ b/Platform/Marvell/Drivers/Net/Pp2Dxe/Mvpp2Lib.c
@@ -4804,6 +4804,25 @@ MvGop110PortEventsMask (
   return 0;
 }
 
+/*
+ * Sets "Force Link Pass" and clears "Do Not Force Link Fail" bits.
+ * This function should only be called when the port is disabled.
+ */
+VOID
+MvGop110GmacForceLinkUp (
+  IN PP2DXE_PORT *Port
+  )
+{
+  UINT32 RegVal;
+
+  RegVal = MvGop110GmacRead (Port, MVPP2_PORT_AUTO_NEG_CFG_REG);
+
+  RegVal |= MVPP2_PORT_AUTO_NEG_CFG_FORCE_LINK_UP_MASK;
+  RegVal &= ~MVPP2_PORT_AUTO_NEG_CFG_FORCE_LINK_DOWN_MASK;
+
+  MvGop110GmacWrite (Port, MVPP2_PORT_AUTO_NEG_CFG_REG, RegVal);
+}
+
 INT32
 MvGop110FlCfg (
   IN PP2DXE_PORT *Port
diff --git a/Platform/Marvell/Drivers/Net/Pp2Dxe/Mvpp2Lib.h b/Platform/Marvell/Drivers/Net/Pp2Dxe/Mvpp2Lib.h
index a7011f7..3dc9ecd 100644
--- a/Platform/Marvell/Drivers/Net/Pp2Dxe/Mvpp2Lib.h
+++ b/Platform/Marvell/Drivers/Net/Pp2Dxe/Mvpp2Lib.h
@@ -504,6 +504,11 @@ MvGop110XlgPortLinkEventMask (
   IN PP2DXE_PORT *Port
   );
 
+VOID
+MvGop110GmacForceLinkUp (
+  IN PP2DXE_PORT *Port
+  );
+
 INT32
 MvGop110FlCfg (
   IN PP2DXE_PORT *Port
diff --git a/Platform/Marvell/Drivers/Net/Pp2Dxe/Pp2Dxe.c b/Platform/Marvell/Drivers/Net/Pp2Dxe/Pp2Dxe.c
index 2827976..b0a38b3 100644
--- a/Platform/Marvell/Drivers/Net/Pp2Dxe/Pp2Dxe.c
+++ b/Platform/Marvell/Drivers/Net/Pp2Dxe/Pp2Dxe.c
@@ -1310,7 +1310,11 @@ Pp2DxeInitialiseController (
     NetCompConfig |= MvpPp2xGop110NetcCfgCreate(&Pp2Context->Port);
 
     MvGop110PortInit(&Pp2Context->Port);
-    MvGop110FlCfg(&Pp2Context->Port);
+
+    if (Pp2Context->Port.AlwaysUp == TRUE) {
+      MvGop110GmacForceLinkUp (&Pp2Context->Port);
+      MvGop110FlCfg (&Pp2Context->Port);
+    }
 
     Status = gBS->CreateEvent (
                  EVT_SIGNAL_EXIT_BOOT_SERVICES,
-- 
2.7.4