LiPPERT Toucan-AF [1/2]: create board by forking AMD Persimmon

Step 1: copy all files unmodified from Persimmon.  This makes it much
easier later to see how the two boards actually and deliberately differ
when porting bugfixes from one to the other.  Git's copy detection is
imperfect (and slow).

Change-Id: I1ff02913479c07679f8c3ae5e6dd7876e6000b55
Signed-off-by: Jens Rottmann <JRottmann@LiPPERTembedded.de>
Reviewed-on: http://review.coreboot.org/2571
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>

1 files changed, 164 insertions, 0 deletions

diff --git a/src/mainboard/lippert/toucan-af/dimmSpd.c b/src/mainboard/lippert/toucan-af/dimmSpd.c
new file mode 100644
index 0000000000..a021cc26ce
--- /dev/null
+++ b/src/mainboard/lippert/toucan-af/dimmSpd.c
@@ -0,0 +1,164 @@
+/*
+ * 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);
+}