Support AST2400 Console.

Change-Id: Iaf2da65e0a965001c7387b86daa2990934e7dbb9
Reviewed-on: http://gfw160.aus.stglabs.ibm.com:8080/gerrit/13251
Tested-by: Jenkins Server
Reviewed-by: Daniel M. Crowell <dcrowell@us.ibm.com>
Reviewed-by: A. Patrick Williams III <iawillia@us.ibm.com>

4 files changed, 135 insertions, 0 deletions

diff --git a/src/usr/console/HBconfig b/src/usr/console/HBconfig
index ee8885cbf..4f667522d 100644
--- a/src/usr/console/HBconfig
+++ b/src/usr/console/HBconfig
@@ -2,3 +2,9 @@ config CONSOLE
     default n
     help
         Enable console support.
+
+config CONSOLE_AST2400
+    default y if CONSOLE
+    depends on CONSOLE
+    help
+        Console support for AST2400 device.
diff --git a/src/usr/console/ast2400.C b/src/usr/console/ast2400.C
new file mode 100644
index 000000000..0723c5342
--- /dev/null
+++ b/src/usr/console/ast2400.C
@@ -0,0 +1,124 @@
+/* IBM_PROLOG_BEGIN_TAG                                                   */
+/* This is an automatically generated prolog.                             */
+/*                                                                        */
+/* $Source: src/usr/console/ast2400.C $                                   */
+/*                                                                        */
+/* OpenPOWER HostBoot Project                                             */
+/*                                                                        */
+/* Contributors Listed Below - COPYRIGHT 2014                             */
+/* [+] International Business Machines Corp.                              */
+/*                                                                        */
+/*                                                                        */
+/* Licensed under the Apache License, Version 2.0 (the "License");        */
+/* you may not use this file except in compliance with the License.       */
+/* You may obtain a copy of the License at                                */
+/*                                                                        */
+/*     http://www.apache.org/licenses/LICENSE-2.0                         */
+/*                                                                        */
+/* Unless required by applicable law or agreed to in writing, software    */
+/* distributed under the License is distributed on an "AS IS" BASIS,      */
+/* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or        */
+/* implied. See the License for the specific language governing           */
+/* permissions and limitations under the License.                         */
+/*                                                                        */
+/* IBM_PROLOG_END_TAG                                                     */
+#include "uart.H"
+#include <devicefw/userif.H>
+#include <lpc/lpcif.H>
+#include <errl/errlmanager.H>
+
+namespace CONSOLE
+{
+
+/** Overload the base class with Ast2400 specifices.
+ *
+ *  In initialization we need to program the SIO device on the AST2400 to
+ *  enable the Uart device.
+ */
+class Ast2400Uart : public Uart
+{
+    private:
+
+        // Perform raw LPC writes to SIO region.
+        errlHndl_t _writeReg(uint64_t i_addr, uint8_t i_byte)
+        {
+            size_t len = sizeof(i_byte);
+            return deviceWrite(TARGETING::MASTER_PROCESSOR_CHIP_TARGET_SENTINEL,
+                               &i_byte,
+                               len,
+                               DEVICE_LPC_ADDRESS(LPC::TRANS_IO, i_addr));
+        }
+
+    public:
+
+        virtual void initialize()
+        {
+            errlHndl_t l_errl = NULL;
+
+            do
+            {
+
+                // Unlock the SIO registers
+                //  (write 0xA5 password to offset 0x2E two times)
+                l_errl = _writeReg( 0x2e, 0xA5 );
+                if (l_errl) { break; }
+                l_errl = _writeReg( 0x2e, 0xA5 );
+                if (l_errl) { break; }
+
+                // Select logical device 2 (SUART1) in SIO
+                l_errl = _writeReg( 0x2e, 0x07 ); // select logical dev number
+                if (l_errl) { break; }
+                l_errl = _writeReg( 0x2f, 0x02 ); // write device 2
+                if (l_errl) { break; }
+
+                // Disable SUART1 to change settings
+                l_errl = _writeReg( 0x2e, 0x30 ); // select SIO base enable
+                if (l_errl) { break; }
+                l_errl = _writeReg( 0x2f, 0x00 ); // clear enable
+                if (l_errl) { break; }
+
+                // Set SUART1 addr to g_uartBase
+                l_errl = _writeReg( 0x2e, 0x60 ); // select SIO addr[7:3]
+                if (l_errl) { break; }
+                l_errl = _writeReg( 0x2f, (g_uartBase >> 8) & 0xFF );
+                if (l_errl) { break; }
+                l_errl = _writeReg( 0x2e, 0x61 ); // select SIO addr[15:8]
+                if (l_errl) { break; }
+                l_errl = _writeReg( 0x2f, (g_uartBase & 0xFF) );
+                if (l_errl) { break; }
+
+                // Set the SerIRQ
+                l_errl = _writeReg( 0x2e, 0x70 );
+                if (l_errl) { break; }
+                l_errl = _writeReg( 0x2f, 0x04 );
+                if (l_errl) { break; }
+                l_errl = _writeReg( 0x2e, 0x71 );
+                if (l_errl) { break; }
+                l_errl = _writeReg( 0x2f, 0x01 );
+
+                // Enable SUART1
+                l_errl = _writeReg( 0x2e, 0x30 ); // select SIO base enable
+                if (l_errl) { break; }
+                l_errl = _writeReg( 0x2f, 0x01 ); // write enable
+                if (l_errl) { break; }
+
+                // Lock the SIO registers
+                l_errl = _writeReg( 0x2e, 0xAA );
+                if (l_errl) { break; }
+
+            } while(0);
+
+            if (l_errl)
+            {
+                setFailed();
+                errlCommit(l_errl, CONSOLE_COMP_ID);
+            }
+
+            Uart::initialize();
+        }
+
+};
+
+CONSOLE_UART_DEFINE_DEVICE(Ast2400Uart);
+
+}
diff --git a/src/usr/console/console.C b/src/usr/console/console.C
index 74f496f93..8a066fe85 100644
--- a/src/usr/console/console.C
+++ b/src/usr/console/console.C
@@ -6,6 +6,7 @@
 /* OpenPOWER HostBoot Project                                             */
 /*                                                                        */
 /* Contributors Listed Below - COPYRIGHT 2014                             */
+/* [+] Google Inc.                                                        */
 /* [+] International Business Machines Corp.                              */
 /* [+] Google Inc.                                                        */
 /*                                                                        */
@@ -66,6 +67,8 @@ namespace CONSOLE
         class OutputBuffer : public Util::ConsoleBufferInterface
         {
             public:
+                OutputBuffer() { str.reserve(64); }
+
                 int putc(int c)
                 {
                     str.push_back(c);
diff --git a/src/usr/console/makefile b/src/usr/console/makefile
index 8252fb17a..2ff59d71d 100644
--- a/src/usr/console/makefile
+++ b/src/usr/console/makefile
@@ -8,6 +8,7 @@
 # Contributors Listed Below - COPYRIGHT 2014
 # [+] Google Inc.
 # [+] International Business Machines Corp.
+# [+] Google Inc.
 #
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
@@ -29,5 +30,6 @@ MODULE = console
 OBJS += daemon.o
 OBJS += uart.o
 OBJS += uartconfig.o
+OBJS += $(if $(CONFIG_CONSOLE_AST2400),ast2400.o)
 
 include $(ROOTPATH)/config.mk