mainboard: Add AMD unionstation RDK support

AMD unionstation Reference Design Kit is Designed for hd settop box application.
This platform using family14 APU, SB800 southbridge.
Vgabios is required, can download vgabios from AMD NDA website.
Verified Feature:
 HDMI, LAN, mini-pcie slots, sata, usb, analog audio and
 optical fiber digital audio output.

Change-Id: Ib1d1d8c889d6fb29f4298b57dfe5c5c1cea1431c
Signed-off-by: Kerry She <kerry.she@amd.com>
Signed-off-by: Kerry She <shekairui@gmail.com>
Reviewed-on: http://review.coreboot.org/434
Tested-by: build bot (Jenkins)
Reviewed-by: Marc Jones <marcj303@gmail.com>

1 files changed, 166 insertions, 0 deletions

diff --git a/src/mainboard/amd/union_station/dimmSpd.c b/src/mainboard/amd/union_station/dimmSpd.c
new file mode 100644
index 0000000000..9da0e0e3a8
--- /dev/null
+++ b/src/mainboard/amd/union_station/dimmSpd.c
@@ -0,0 +1,166 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2011 Advanced Micro Devices, Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA
+ */
+ 
+#include "Porting.h"
+#include "AGESA.h"
+#include "amdlib.h"
+
+AGESA_STATUS AmdMemoryReadSPD (UINT32 unused1, UINT32 unused2, AGESA_READ_SPD_PARAMS *info);
+#define DIMENSION(array)(sizeof (array)/ sizeof (array [0]))
+
+/*#pragma optimize ("", off) // for source level debug
+*---------------------------------------------------------------------------
+*
+* SPD address table - porting required
+*/
+
+static const UINT8 spdAddressLookup [2] [2] [4] =  // socket, channel, dimm
+   {
+   // socket 0
+      {
+         {0xA0, 0xA2},  // channel 0 dimms
+         {0x00, 0x00},  // channel 1 dimms
+      },
+   // socket 1
+      {
+         {0x00, 0x00},  // channel 0 dimms
+         {0x00, 0x00},  // channel 1 dimms
+      },
+   };
+
+/*-----------------------------------------------------------------------------
+ *
+ * readSmbusByteData - read a single SPD byte from any offset
+ */
+
+static int readSmbusByteData (int iobase, int address, char *buffer, int offset)
+   {
+   unsigned int status;
+   UINT64 limit;
+
+   address |= 1; // set read bit
+   
+   __outbyte (iobase + 0, 0xFF);                // clear error status
+   __outbyte (iobase + 1, 0x1F);                // clear error status
+   __outbyte (iobase + 3, offset);              // offset in eeprom
+   __outbyte (iobase + 4, address);             // slave address and read bit
+   __outbyte (iobase + 2, 0x48);                // read byte command
+
+   // time limit to avoid hanging for unexpected error status (should never happen)
+   limit = __rdtsc () + 2000000000 / 10;
+   for (;;)
+      {
+      status = __inbyte (iobase);
+      if (__rdtsc () > limit) break;
+      if ((status & 2) == 0) continue;               // SMBusInterrupt not set, keep waiting
+      if ((status & 1) == 1) continue;               // HostBusy set, keep waiting
+      break;
+      }
+
+   buffer [0] = __inbyte (iobase + 5);
+   if (status == 2) status = 0;                      // check for done with no errors
+   return status;
+   }
+
+/*-----------------------------------------------------------------------------
+ *
+ * readSmbusByte - read a single SPD byte from the default offset
+ *                 this function is faster function readSmbusByteData
+ */
+
+static int readSmbusByte (int iobase, int address, char *buffer)
+   {
+   unsigned int status;
+   UINT64 limit;
+
+   __outbyte (iobase + 0, 0xFF);                // clear error status
+   __outbyte (iobase + 2, 0x44);                // read command
+
+   // time limit to avoid hanging for unexpected error status
+   limit = __rdtsc () + 2000000000 / 10;
+   for (;;)
+      {
+      status = __inbyte (iobase);
+      if (__rdtsc () > limit) break;
+      if ((status & 2) == 0) continue;               // SMBusInterrupt not set, keep waiting
+      if ((status & 1) == 1) continue;               // HostBusy set, keep waiting
+      break;
+      }
+
+   buffer [0] = __inbyte (iobase + 5);
+   if (status == 2) status = 0;                      // check for done with no errors
+   return status;
+   }
+
+/*---------------------------------------------------------------------------
+ *
+ * readspd - Read one or more SPD bytes from a DIMM.
+ *           Start with offset zero and read sequentially.
+ *           Optimization relies on autoincrement to avoid 
+ *           sending offset for every byte.
+ *          Reads 128 bytes in 7-8 ms at 400 KHz.
+ */
+
+static int readspd (int iobase, int SmbusSlaveAddress, char *buffer, int count)
+   {
+   int index, error;
+
+   /* read the first byte using offset zero */
+   error = readSmbusByteData (iobase, SmbusSlaveAddress, buffer, 0);
+   if (error) return error;
+
+   /* read the remaining bytes using auto-increment for speed */
+   for (index = 1; index < count; index++)
+      {
+      error = readSmbusByte (iobase, SmbusSlaveAddress, &buffer [index]);
+      if (error) return error;
+      }
+   
+   return 0;
+   }
+
+static void writePmReg (int reg, int data)
+   {
+   __outbyte (0xCD6, reg);
+   __outbyte (0xCD7, data);
+   }
+
+static void setupFch (int ioBase)
+   {
+   writePmReg (0x2D, ioBase >> 8);
+   writePmReg (0x2C, ioBase | 1);
+   writePmReg (0x29, 0x80);
+   writePmReg (0x28, 0x61);
+   __outbyte (ioBase + 0x0E, 66000000 / 400000 / 4); // set SMBus clock to 400 KHz
+   }
+
+AGESA_STATUS AmdMemoryReadSPD (UINT32 unused1, UINT32 unused2, AGESA_READ_SPD_PARAMS *info)
+   {
+   int spdAddress, ioBase;
+
+   if (info->SocketId     >= DIMENSION (spdAddressLookup      )) return AGESA_ERROR; 
+   if (info->MemChannelId >= DIMENSION (spdAddressLookup[0]   )) return AGESA_ERROR; 
+   if (info->DimmId       >= DIMENSION (spdAddressLookup[0][0])) return AGESA_ERROR;
+   
+   spdAddress = spdAddressLookup [info->SocketId] [info->MemChannelId] [info->DimmId]; 
+   if (spdAddress == 0) return AGESA_ERROR;
+   ioBase = 0xB00;
+   setupFch (ioBase);
+   return readspd (ioBase, spdAddress, (void *) info->Buffer, 128);
+   }