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Diffstat (limited to 'src/southbridge/amd/cimx/sb700/smbus_spd.c')
-rw-r--r--src/southbridge/amd/cimx/sb700/smbus_spd.c160
1 files changed, 0 insertions, 160 deletions
diff --git a/src/southbridge/amd/cimx/sb700/smbus_spd.c b/src/southbridge/amd/cimx/sb700/smbus_spd.c
deleted file mode 100644
index 73261c4ab4..0000000000
--- a/src/southbridge/amd/cimx/sb700/smbus_spd.c
+++ /dev/null
@@ -1,160 +0,0 @@
-/*
- * This file is part of the coreboot project.
- *
- * Copyright (C) 2012 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.
- */
-#include <device/pci_def.h>
-#include <device/device.h>
-#include <stdlib.h>
-#include "OEM.h" /* SMBUS0_BASE_ADDRESS */
-
-/* warning: Porting.h includes an open #pragma pack(1) */
-#include "Porting.h"
-#include "AGESA.h"
-#include "amdlib.h"
-#include "chip.h"
-#include "smbus_spd.h"
-
-#include <northbridge/amd/agesa/dimmSpd.h>
-
-/* uncomment for source level debug - GDB gets really confused otherwise. */
-//#pragma optimize ("", off)
-
-/**
- * Read a single SPD byte. If the first byte is being read, set up the
- * address and offset. Following bytes auto increment.
- */
-static UINT8 readSmbusByte(UINT16 iobase, UINT8 address, char *buffer,
- int offset, int initial_offset)
-{
- unsigned int status = -1;
- UINT64 time_limit;
-
- /* clear status register */
- __outbyte(iobase + SMBUS_STATUS_REG, 0xFF);
- __outbyte(iobase + SMBUS_SLAVE_STATUS_REG, 0x1F);
-
- if (offset == initial_offset) {
- /* Set offset, set slave address and start reading */
- __outbyte(iobase + SMBUS_CONTROL_REG, offset);
- __outbyte(iobase + SMBUS_HOST_CMD_REG, address | READ_BIT);
- __outbyte(iobase + SMBUS_COMMAND_REG, SMBUS_READ_BYTE_COMMAND);
- } else {
- /* Issue read command - auto increments to next byte */
- __outbyte(iobase + SMBUS_COMMAND_REG, SMBUS_READ_COMMAND);
- }
- /* time limit to avoid hanging for unexpected error status */
- time_limit = __rdtsc() + MAX_READ_TSC_COUNT;
- while (__rdtsc() <= time_limit) {
- status = __inbyte(iobase + SMBUS_STATUS_REG);
- if ((status & SMBUS_INTERRUPT_MASK) == 0)
- continue; /* SMBusInterrupt not set, keep waiting */
- if ((status & HOSTBUSY_MASK) != 0)
- continue; /* HostBusy set, keep waiting */
- break;
- }
-
- if (status != STATUS__COMPLETED_SUCCESSFULLY)
- return AGESA_ERROR;
-
- buffer[0] = __inbyte(iobase + SMBUS_DATA0_REG);
- return AGESA_SUCCESS;
-}
-
-/**
- * Write a single smbus byte.
- */
-UINT8 writeSmbusByte(UINT16 iobase, UINT8 address, UINT8 buffer,
- int offset)
-{
- unsigned int status = -1;
- UINT64 time_limit;
-
- /* clear status register */
- __outbyte(iobase + SMBUS_STATUS_REG, 0xFF);
- __outbyte(iobase + SMBUS_SLAVE_STATUS_REG, 0x1F);
-
- /* set offset, set slave address, set data and start writing */
- __outbyte(iobase + SMBUS_CONTROL_REG, offset);
- __outbyte(iobase + SMBUS_HOST_CMD_REG, address & (~READ_BIT));
- __outbyte(iobase + SMBUS_DATA0_REG, buffer);
- __outbyte(iobase + SMBUS_COMMAND_REG, SMBUS_WRITE_BYTE_COMMAND);
-
- /* time limit to avoid hanging for unexpected error status */
- time_limit = __rdtsc() + MAX_READ_TSC_COUNT;
- while (__rdtsc() <= time_limit) {
- status = __inbyte(iobase + SMBUS_STATUS_REG);
- if ((status & SMBUS_INTERRUPT_MASK) == 0)
- continue; /* SMBusInterrupt not set, keep waiting */
- if ((status & HOSTBUSY_MASK) != 0)
- continue; /* HostBusy set, keep waiting */
- break;
- }
-
- if (status != STATUS__COMPLETED_SUCCESSFULLY)
- return AGESA_ERROR;
-
- return AGESA_SUCCESS;
-}
-
-static void setupFch(UINT16 ioBase)
-{
- AMD_CONFIG_PARAMS StdHeader;
- UINT32 PciData32;
- UINT8 PciData8;
- PCI_ADDR PciAddress;
-
- /* Set SMBus MMIO. */
- PciAddress.AddressValue = MAKE_SBDFO (0, 0, 20, 0, 0x90);
- PciData32 = (ioBase & 0xFFFFFFF0) | BIT0;
- LibAmdPciWrite(AccessWidth32, PciAddress, &PciData32, &StdHeader);
-
- /* Enable SMBus MMIO. */
- PciAddress.AddressValue = MAKE_SBDFO (0, 0, 20, 0, 0xD2);
- LibAmdPciRead(AccessWidth8, PciAddress, &PciData8, &StdHeader);
- PciData8 |= BIT0;
- LibAmdPciWrite(AccessWidth8, PciAddress, &PciData8, &StdHeader);
-
- /* Set SMBus clock to 400 KHz */
- __outbyte(ioBase + SMBUS_CLOCK_REG, SMBUS_FREQUENCY_CONST / 400000);
-}
-
-/**
- * Read one or more SPD bytes from a DIMM.
- * Start with offset zero and read sequentially.
- * Reads 128 bytes in 7-8 ms at 400 KHz.
- */
-static UINT8 readspd(UINT16 iobase, UINT8 SmbusSlaveAddress, char *buffer,
- UINT16 count)
-{
- UINT16 index;
- UINT8 status;
- UINT8 initial_offset = 0;
-
- setupFch(iobase);
-
- for (index = initial_offset; index < count; index++) {
- status = readSmbusByte(iobase, SmbusSlaveAddress, &buffer[index], index,
- initial_offset);
- if (status != AGESA_SUCCESS)
- return status;
- }
-
- return status;
-}
-
-int smbus_readSpd(int spdAddress, char *buf, size_t len)
-{
- int ioBase = SMBUS0_BASE_ADDRESS;
- setupFch (ioBase);
- return readspd (ioBase, spdAddress, buf, len);
-}