diff options
Diffstat (limited to 'src/northbridge/amd/agesa/family14')
| -rw-r--r-- | src/northbridge/amd/agesa/family14/Makefile.inc | 2 | ||||
| -rw-r--r-- | src/northbridge/amd/agesa/family14/chip.h | 42 | ||||
| -rw-r--r-- | src/northbridge/amd/agesa/family14/dimmSpd.c | 145 | ||||
| -rw-r--r-- | src/northbridge/amd/agesa/family14/dimmSpd.h | 83 |
4 files changed, 272 insertions, 0 deletions
diff --git a/src/northbridge/amd/agesa/family14/Makefile.inc b/src/northbridge/amd/agesa/family14/Makefile.inc index 87f4927441..e7093fe483 100644 --- a/src/northbridge/amd/agesa/family14/Makefile.inc +++ b/src/northbridge/amd/agesa/family14/Makefile.inc @@ -17,4 +17,6 @@ # Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA # +romstage-y += dimmSpd.c + ramstage-y += northbridge.c diff --git a/src/northbridge/amd/agesa/family14/chip.h b/src/northbridge/amd/agesa/family14/chip.h new file mode 100644 index 0000000000..56d9c92938 --- /dev/null +++ b/src/northbridge/amd/agesa/family14/chip.h @@ -0,0 +1,42 @@ +/* + * This file is part of the coreboot project. + * + * Copyright (C) 2013 Sage Electronic Engineering, LLC + * + * 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 + */ + +#ifndef _NB_AGESA_CHIP_H_ +#define _NB_AGESA_CHIP_H_ + +struct northbridge_amd_agesa_family14_config +{ + /* + * Here is an example of how this would be put into the devicetree.cb file + * Note that only Socket 0, Channel 0 is used for the Ontario + * (family 14, Fam 0x00-0x0F) parts. + * This should be placed after the device pci 18.x statements + * + * register "spdAddrLookup" = " + * { // Use 8-bit SPD addresses here + * { {0xA0, 0xA2}, {0x00, 0x00}, }, // socket 0 - Channel 0 & 1 + * { {0x00, 0x00}, {0x00, 0x00}, }, // socket 1 - Channel 0 & 1 (Unused) + * }" + * + */ + + u8 spdAddrLookup[2][2][4]; +}; + +#endif diff --git a/src/northbridge/amd/agesa/family14/dimmSpd.c b/src/northbridge/amd/agesa/family14/dimmSpd.c new file mode 100644 index 0000000000..a3f5bb3627 --- /dev/null +++ b/src/northbridge/amd/agesa/family14/dimmSpd.c @@ -0,0 +1,145 @@ +/* + * 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 <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 "dimmSpd.h" +#include "chip.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, 0x1E); + + if (offset == initial_offset) { + /* Clear slave status, set offset, set slave address and start reading */ + __outbyte(iobase + SMBUS_SLAVE_STATUS_REG, 0x3E); + __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; +} + +static void writePmReg(UINT8 reg, UINT8 data) +{ + __outbyte(PMIO_INDEX_REG, reg); + __outbyte(PMIO_DATA_REG, data); +} + +static void setupFch(UINT16 ioBase) +{ + /* set up SMBUS - Set to SMBUS 0 & set base address */ + /* For SB800 & Hudson1 to SB900 & Hudson 2/3 */ + writePmReg(SMBUS_BAR_HIGH_BYTE, ioBase >> 8); + writePmReg(SMBUS_BAR_LOW_BYTE, (ioBase & 0xe0) | 1); + + /* 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; +} + +/** + * Gets the SMBUS address for an SPD from the array in devicetree.cb + * then read the SPD into the supplied buffer. + */ +AGESA_STATUS agesa_ReadSPD(UINT32 unused1, UINT32 unused2, void *infoptr) +{ + UINT8 spdAddress; + AGESA_READ_SPD_PARAMS *info = infoptr; + ROMSTAGE_CONST struct device *dev = dev_find_slot(0, PCI_DEVFN(0x18, 2)); + ROMSTAGE_CONST struct northbridge_amd_agesa_family14_config *config = NULL; + + if ((dev == 0) || (dev->chip_info == 0)) + return AGESA_ERROR; + + config = dev->chip_info; + if (info->SocketId >= ARRAY_SIZE(config->spdAddrLookup)) + return AGESA_ERROR; + if (info->MemChannelId >= ARRAY_SIZE(config->spdAddrLookup[0])) + return AGESA_ERROR; + if (info->DimmId >= ARRAY_SIZE(config->spdAddrLookup[0][0])) + return AGESA_ERROR; + + spdAddress = config->spdAddrLookup + [info->SocketId][info->MemChannelId][info->DimmId]; + + if (spdAddress == 0) + return AGESA_ERROR; + return readspd(SMBUS0_BASE_ADDRESS, spdAddress, (void *)info->Buffer, 128); +} diff --git a/src/northbridge/amd/agesa/family14/dimmSpd.h b/src/northbridge/amd/agesa/family14/dimmSpd.h new file mode 100644 index 0000000000..57512c72bb --- /dev/null +++ b/src/northbridge/amd/agesa/family14/dimmSpd.h @@ -0,0 +1,83 @@ +/* + * 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, MA02110-1301 USA + */ + +/*---------------------------------------------------------------------------------------- + * M O D U L E S U S E D + *---------------------------------------------------------------------------------------- + */ + +#ifndef _DIMMSPD_H_ +#define _DIMMSPD_H_ + +/*---------------------------------------------------------------------------------------- + * D E F I N I T I O N S A N D M A C R O S + *---------------------------------------------------------------------------------------- + */ + +#define READ_BIT 0x01 + +#define SMBUS_INTERRUPT_MASK 0x02 +#define HOSTBUSY_MASK 0x01 + +#define SMBUS_READ_BYTE_COMMAND 0x48 +#define SMBUS_READ_COMMAND 0x44 + +#define MAX_READ_TSC_COUNT (2000000000 / 10) + +#define PMIO_INDEX_REG 0xCD6 +#define PMIO_DATA_REG 0xCD7 + +#define SMBUS_BAR_LOW_BYTE 0x2C +#define SMBUS_BAR_HIGH_BYTE 0x2D + +#define SMBUS_STATUS_REG 0x00 +#define SMBUS_SLAVE_STATUS_REG 0x01 +#define SMBUS_COMMAND_REG 0x02 +#define SMBUS_CONTROL_REG 0x03 +#define SMBUS_HOST_CMD_REG 0x04 +#define SMBUS_DATA0_REG 0x05 +#define SMBUS_CLOCK_REG 0x0E + +#define STATUS__COMPLETED_SUCCESSFULLY 0x02 + +#define SMBUS_FREQUENCY_CONST 66000000 / 4 +/*---------------------------------------------------------------------------------------- + * 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 +agesa_ReadSPD (IN UINT32 Func, IN UINT32 Data, IN OUT void *SpdData); + +/*--------------------------------------------------------------------------------------- + * L O C A L F U N C T I O N S + *--------------------------------------------------------------------------------------- + */ + +#endif |