mainboard: Add AMD southstation RDK support

AMD southstation Reference Design Kit is designed for NAS application.
This platform using family14 RevC0 processor, SB850 southbridge.
Vgabios and Promise RAID Option ROM is required for hardware RAID support,
can retrieve from the AMD NDA website.
Verified feature:
 HDMI, LAN, usb and mini-pcie slot.
 RAID0, RAID1 RAID10 and RAID5 upto 6 sata hard drive with ubuntu server 10.10.

Change-Id: I16e6f5dab8b0d634e186068c81436db77fb4475a
Signed-off-by: Kerry She <kerry.she@amd.com>
Signed-off-by: Kerry She <shekairui@gmail.com>
Reviewed-on: http://review.coreboot.org/433
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/south_station/dimmSpd.c b/src/mainboard/amd/south_station/dimmSpd.c
new file mode 100644
index 0000000000..9da0e0e3a8
--- /dev/null
+++ b/src/mainboard/amd/south_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);
+   }