AMD Persimmon: Use SPD read code from F14 wrapper

Changes:
 - Get rid of the persimmon mainboard specific code which has been
   moved into the wrapper as a platform generic function in change
   http://review.coreboot.org/#/c/2497/
   AMD f14: Add SPD read functions to wrapper code

 - Move DIMM addresses into devicetree.cb

 - Add the ASF init that used to be in the SPD read code into
   mainboard_enable()

Notes:
 - The DIMM reads only happen in romstage, so the function is not
   available in ramstage.  Point the read-SPD callback to a generic
   function in ramstage.

Change-Id: I5f017dbb8dee5a09ec19734a6069ff9b71a6ab50
Signed-off-by: Martin Roth <martin.roth@se-eng.com>
Reviewed-on: http://review.coreboot.org/2500
Tested-by: build bot (Jenkins)
Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>
Reviewed-by: Jens Rottmann <JRottmann@LiPPERTembedded.de>
Reviewed-by: Marc Jones <marc.jones@se-eng.com>

6 files changed, 22 insertions, 231 deletions

diff --git a/src/mainboard/amd/persimmon/BiosCallOuts.c b/src/mainboard/amd/persimmon/BiosCallOuts.c
index 9bad4f4490..700da08eba 100644
--- a/src/mainboard/amd/persimmon/BiosCallOuts.c
+++ b/src/mainboard/amd/persimmon/BiosCallOuts.c
@@ -19,10 +19,10 @@
 
 #include "agesawrapper.h"
 #include "amdlib.h"
-#include "dimmSpd.h"
 #include "BiosCallOuts.h"
 #include "heapManager.h"
 #include "SB800.h"
+#include <northbridge/amd/agesa/family14/dimmSpd.h>
 
 STATIC BIOS_CALLOUT_STRUCT BiosCallouts[] =
 {
@@ -428,7 +428,11 @@ AGESA_STATUS BiosReset (UINT32 Func, UINT32 Data, VOID *ConfigPtr)
 AGESA_STATUS BiosReadSpd (UINT32 Func, UINT32 Data, VOID *ConfigPtr)
 {
 	AGESA_STATUS Status;
-	Status = AmdMemoryReadSPD (Func, Data, (AGESA_READ_SPD_PARAMS *)ConfigPtr);
+#ifdef __PRE_RAM__
+	Status = agesa_ReadSPD (Func, Data, ConfigPtr);
+#else
+	Status = AGESA_UNSUPPORTED;
+#endif
 
 	return Status;
 }
diff --git a/src/mainboard/amd/persimmon/Makefile.inc b/src/mainboard/amd/persimmon/Makefile.inc
index b1a301413c..17443bc23d 100644
--- a/src/mainboard/amd/persimmon/Makefile.inc
+++ b/src/mainboard/amd/persimmon/Makefile.inc
@@ -26,13 +26,11 @@ endif
 
 romstage-y += buildOpts.c
 romstage-y += agesawrapper.c
-romstage-y += dimmSpd.c
 romstage-y += BiosCallOuts.c
 romstage-y += PlatformGnbPcie.c
 
 ramstage-y += buildOpts.c
 ramstage-y += agesawrapper.c
-ramstage-y += dimmSpd.c
 ramstage-y += BiosCallOuts.c
 ramstage-y += PlatformGnbPcie.c
 
diff --git a/src/mainboard/amd/persimmon/devicetree.cb b/src/mainboard/amd/persimmon/devicetree.cb
index d108a11e5d..8b1acd5bb3 100644
--- a/src/mainboard/amd/persimmon/devicetree.cb
+++ b/src/mainboard/amd/persimmon/devicetree.cb
@@ -149,6 +149,13 @@ chip northbridge/amd/agesa/family14/root_complex
 			device pci 18.5 on end
 			device pci 18.6 on end
 			device pci 18.7 on end
+
+			register "spdAddrLookup" = "
+			{
+				{ {0xA0, 0xA2}, {0x00, 0x00}, }, // socket 0 - Channel 0 & 1 - 8-bit SPD addresses
+				{ {0x00, 0x00}, {0x00, 0x00}, }, // socket 1 - Channel 0 & 1 - 8-bit SPD addresses
+			}"
+
 		end #chip northbridge/amd/agesa/family14 # CPU side of HT root complex
 	end #domain
 end #northbridge/amd/agesa/family14/root_complex
diff --git a/src/mainboard/amd/persimmon/dimmSpd.c b/src/mainboard/amd/persimmon/dimmSpd.c
deleted file mode 100644
index a021cc26ce..0000000000
--- a/src/mainboard/amd/persimmon/dimmSpd.c
+++ /dev/null
@@ -1,164 +0,0 @@
-/*
- * 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"
-#include "OEM.h" /* SMBUS0_BASE_ADDRESS */
-
-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 = SMBUS0_BASE_ADDRESS;
-	setupFch (ioBase);
-	return readspd (ioBase, spdAddress, (void *) info->Buffer, 128);
-}
diff --git a/src/mainboard/amd/persimmon/dimmSpd.h b/src/mainboard/amd/persimmon/dimmSpd.h
deleted file mode 100644
index 9ff397d87c..0000000000
--- a/src/mainboard/amd/persimmon/dimmSpd.h
+++ /dev/null
@@ -1,63 +0,0 @@
-/*
- * 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/mainboard/amd/persimmon/mainboard.c b/src/mainboard/amd/persimmon/mainboard.c
index 99e1c306a2..6cba175370 100644
--- a/src/mainboard/amd/persimmon/mainboard.c
+++ b/src/mainboard/amd/persimmon/mainboard.c
@@ -73,6 +73,15 @@ static void mainboard_enable(device_t dev)
 	*(misc_mem_clk_cntrl + 2) = 0x00;
 	*(misc_mem_clk_cntrl + 3) = 0x00;
 	*(misc_mem_clk_cntrl + 4) = 0x00;
+
+	/*
+	 * Initialize ASF registers to an arbitrary address because someone
+	 * long ago set things up this way inside the SPD read code.  The
+	 * SPD read code has been made generic and moved out of the persimmon
+	 * directory, so the ASF init is being done here.
+	 */
+	pm_iowrite(0x29, 0x80);
+	pm_iowrite(0x28, 0x61);
 }
 
 struct chip_operations mainboard_ops = {