AGESA fam12: Move dimmSpd

Implemented under northbridge/ on other families.

Change-Id: I4d21af9d6c0f61eb1597e8e7095c08dd87ae2a84
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: http://review.coreboot.org/5649
Tested-by: build bot (Jenkins)
Reviewed-by: Patrick Georgi <patrick@georgi-clan.de>

4 files changed, 315 insertions, 0 deletions

diff --git a/src/northbridge/amd/agesa/family12/Makefile.inc b/src/northbridge/amd/agesa/family12/Makefile.inc
index ff7f84550f..62c851903f 100644
--- a/src/northbridge/amd/agesa/family12/Makefile.inc
+++ b/src/northbridge/amd/agesa/family12/Makefile.inc
@@ -18,8 +18,10 @@
 #
 
 romstage-y += fam12_callouts.c
+romstage-y += dimmSpd.c
 
 ramstage-y += northbridge.c
 ramstage-y += fam12_callouts.c
+ramstage-y += dimmSpd.c
 
 ramstage-$(CONFIG_GENERATE_ACPI_TABLES) += ssdt.asl
diff --git a/src/northbridge/amd/agesa/family12/dimmSpd.c b/src/northbridge/amd/agesa/family12/dimmSpd.c
new file mode 100644
index 0000000000..55fb2c3b22
--- /dev/null
+++ b/src/northbridge/amd/agesa/family12/dimmSpd.c
@@ -0,0 +1,241 @@
+/*****************************************************************************
+ *
+ * Copyright (c) 2011, Advanced Micro Devices, Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *     * Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above copyright
+ *       notice, this list of conditions and the following disclaimer in the
+ *       documentation and/or other materials provided with the distribution.
+ *     * Neither the name of Advanced Micro Devices, Inc. nor the names of
+ *       its contributors may be used to endorse or promote products derived
+ *       from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL ADVANCED MICRO DEVICES, INC. BE LIABLE FOR ANY
+ * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ ***************************************************************************/
+
+/*----------------------------------------------------------------------------------------
+ *                             M O D U L E S    U S E D
+ *----------------------------------------------------------------------------------------
+ */
+
+#include "Porting.h"
+#include "AGESA.h"
+#include "amdlib.h"
+#include "dimmSpd.h"
+
+/*----------------------------------------------------------------------------------------
+ *                   D E F I N I T I O N S    A N D    M A C R O S
+ *----------------------------------------------------------------------------------------
+ */
+#define SMBUS_BASE_ADDR  0xB00
+#define DIMENSION(array)(sizeof (array)/ sizeof (array [0]))
+
+/*----------------------------------------------------------------------------------------
+ *                  T Y P E D E F S     A N D     S T R U C T U  R E S
+ *----------------------------------------------------------------------------------------
+ */
+
+typedef struct _DIMM_INFO_SMBUS{
+  UINT8   SocketId;
+  UINT8   MemChannelId;
+  UINT8   DimmId;
+  UINT8   SmbusAddress;
+} DIMM_INFO_SMBUS;
+/*
+* SPD address table - porting required
+*/
+STATIC CONST DIMM_INFO_SMBUS SpdAddrLookup [] =
+{
+  /* Socket, Channel, Dimm, Smbus */
+  {0, 0, 0, 0xA0},
+  {0, 1, 0, 0xA2}
+};
+
+/*----------------------------------------------------------------------------------------
+ *           P R O T O T Y P E S     O F     L O C A L     F U  N C T I O N S
+ *----------------------------------------------------------------------------------------
+ */
+
+/*----------------------------------------------------------------------------------------
+ *                          E X P O R T E D    F U N C T I O N S
+ *----------------------------------------------------------------------------------------
+ */
+
+/*---------------------------------------------------------------------------------------
+ *                          L O C A L    F U N C T I O N S
+ *---------------------------------------------------------------------------------------
+ */
+
+STATIC
+VOID
+WritePmReg (
+  IN UINT8 Reg,
+  IN UINT8 Data
+  )
+{
+   __outbyte (0xCD6, Reg);
+   __outbyte (0xCD7, Data);
+}
+STATIC
+VOID
+SetupFch (
+  IN UINT16
+  IN IoBase
+  )
+{
+   WritePmReg (0x2D, IoBase >> 8);
+   WritePmReg (0x2C, IoBase | 1);
+   WritePmReg (0x29, 0x80);
+   WritePmReg (0x28, 0x61);
+   /* set SMBus clock to 400 KHz */
+   __outbyte (IoBase + 0x0E, 66000000 / 400000 / 4);
+}
+
+/*
+ *
+ * ReadSmbusByteData - read a single SPD byte from any offset
+ *
+ */
+
+STATIC
+AGESA_STATUS
+ReadSmbusByteData (
+  IN UINT16 Iobase,
+  IN UINT8  Address,
+  OUT UINT8 *Buffer,
+  IN UINTN  Offset
+  )
+{
+   UINTN  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
+AGESA_STATUS
+ReadSmbusByte (
+  IN UINT16 Iobase,
+  IN UINT8  Address,
+  OUT UINT8 *Buffer
+  )
+{
+  UINTN   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
+AGESA_STATUS
+ReadSpd (
+  IN UINT16 IoBase,
+  IN UINT8  SmbusSlaveAddress,
+  OUT UINT8 *Buffer,
+  IN UINTN  Count
+  )
+{
+  UINTN Index, Status;
+
+  /* read the first byte using offset zero */
+  Status = ReadSmbusByteData (IoBase, SmbusSlaveAddress, Buffer, 0);
+  if (Status) return Status;
+
+  /* read the remaining bytes using auto-increment for speed */
+  for (Index = 1; Index < Count; Index++){
+    Status = ReadSmbusByte (IoBase, SmbusSlaveAddress, &Buffer [Index]);
+    if (Status) return Status;
+  }
+  return 0;
+}
+
+AGESA_STATUS
+AmdMemoryReadSPD (
+  IN UINT32 Func,
+  IN UINT32 Data,
+  IN OUT AGESA_READ_SPD_PARAMS *SpdData
+  )
+{
+   UINT8  SmBusAddress = 0;
+   UINTN  Index;
+   UINTN  MaxSocket = DIMENSION (SpdAddrLookup);
+   for (Index = 0; Index < MaxSocket; Index ++){
+     if ((SpdData->SocketId     == SpdAddrLookup[Index].SocketId)     &&
+         (SpdData->MemChannelId == SpdAddrLookup[Index].MemChannelId) &&
+         (SpdData->DimmId       == SpdAddrLookup[Index].DimmId)) {
+        SmBusAddress = SpdAddrLookup[Index].SmbusAddress;
+        break;
+      }
+   }
+
+
+   if (SmBusAddress == 0) return AGESA_ERROR;
+   SetupFch (SMBUS_BASE_ADDR);
+   return ReadSpd (SMBUS_BASE_ADDR, SmBusAddress, SpdData->Buffer, 128);
+}
diff --git a/src/northbridge/amd/agesa/family12/dimmSpd.h b/src/northbridge/amd/agesa/family12/dimmSpd.h
new file mode 100644
index 0000000000..81ab02e157
--- /dev/null
+++ b/src/northbridge/amd/agesa/family12/dimmSpd.h
@@ -0,0 +1,63 @@
+/*
+ * 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
+ */
+
+/*----------------------------------------------------------------------------------------
+ *                             M O D U L E S    U S E D
+ *----------------------------------------------------------------------------------------
+ */
+
+#ifndef _DIMMSPD_H_
+#define _DIMMSPD_H_
+
+#include "Porting.h"
+#include "AGESA.h"
+
+/*----------------------------------------------------------------------------------------
+ *                   D E F I N I T I O N S    A N D    M A C R O S
+ *----------------------------------------------------------------------------------------
+ */
+
+/*----------------------------------------------------------------------------------------
+ *                  T Y P E D E F S     A N D     S T R U C T U  R E S
+ *----------------------------------------------------------------------------------------
+ */
+
+/*----------------------------------------------------------------------------------------
+ *           P R O T O T Y P E S     O F     L O C A L     F U  N C T I O N S
+ *----------------------------------------------------------------------------------------
+ */
+
+/*----------------------------------------------------------------------------------------
+ *                          E X P O R T E D    F U N C T I O N S
+ *----------------------------------------------------------------------------------------
+ */
+
+AGESA_STATUS
+AmdMemoryReadSPD (
+  IN UINT32 Func,
+  IN UINT32 Data,
+  IN OUT AGESA_READ_SPD_PARAMS *SpdData
+  );
+
+/*---------------------------------------------------------------------------------------
+ *                          L O C A L    F U N C T I O N S
+ *---------------------------------------------------------------------------------------
+ */
+
+#endif
diff --git a/src/northbridge/amd/agesa/family12/fam12_callouts.c b/src/northbridge/amd/agesa/family12/fam12_callouts.c
index add03110e0..192c5ddaff 100644
--- a/src/northbridge/amd/agesa/family12/fam12_callouts.c
+++ b/src/northbridge/amd/agesa/family12/fam12_callouts.c
@@ -19,6 +19,7 @@
 
 #include "agesawrapper.h"
 #include "amdlib.h"
+#include "dimmSpd.h"
 #include "BiosCallOuts.h"
 #include "Ids.h"
 #include "OptionsIds.h"
@@ -352,6 +353,14 @@ AGESA_STATUS BiosReset (UINT32 Func, UINT32 Data, VOID *ConfigPtr)
 	return Status;
 }
 
+AGESA_STATUS BiosReadSpd (UINT32 Func, UINT32 Data, VOID *ConfigPtr)
+{
+	AGESA_STATUS Status;
+	Status = AmdMemoryReadSPD (Func, Data, (AGESA_READ_SPD_PARAMS *)ConfigPtr);
+
+	return Status;
+}
+
 AGESA_STATUS BiosDefaultRet (UINT32 Func, UINT32 Data, VOID *ConfigPtr)
 {
 	return AGESA_UNSUPPORTED;