diff options
author | Kyösti Mälkki <kyosti.malkki@gmail.com> | 2014-10-17 22:33:22 +0300 |
---|---|---|
committer | Kyösti Mälkki <kyosti.malkki@gmail.com> | 2014-10-19 06:18:39 +0200 |
commit | c5cc9f233c9b2a1decf57b6e51438d03152fe54e (patch) | |
tree | db228db39fe95d0fc99d5e913424abb44e1558c2 /src/northbridge/amd/agesa/family15tn/dimmSpd.c | |
parent | f5f9e38d124d97698cc1c6dad3219d6834902203 (diff) |
AGESA fam15tn fam16kb 00730f01: Add common agesa_readSpd()
Remove northbridge specific callouts for AGESA_READ_SPD.
Move low-level SMBus code to southbridge.
Change-Id: I3e272389e2a7db542fb48fca8606325af27b65a5
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: http://review.coreboot.org/7112
Tested-by: build bot (Jenkins)
Reviewed-by: Patrick Georgi <pgeorgi@google.com>
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Reviewed-by: Edward O'Callaghan <eocallaghan@alterapraxis.com>
Diffstat (limited to 'src/northbridge/amd/agesa/family15tn/dimmSpd.c')
-rw-r--r-- | src/northbridge/amd/agesa/family15tn/dimmSpd.c | 119 |
1 files changed, 9 insertions, 110 deletions
diff --git a/src/northbridge/amd/agesa/family15tn/dimmSpd.c b/src/northbridge/amd/agesa/family15tn/dimmSpd.c index 5b8a9b522c..4d5ab5f340 100644 --- a/src/northbridge/amd/agesa/family15tn/dimmSpd.c +++ b/src/northbridge/amd/agesa/family15tn/dimmSpd.c @@ -24,119 +24,15 @@ #include "Porting.h" #include "AGESA.h" #include "amdlib.h" -#include "dimmSpd.h" #include "chip.h" +#include "northbridge/amd/agesa/dimmSpd.h" #define DIMENSION(array)(sizeof (array)/ sizeof (array [0])) -/*----------------------------------------------------------------------------- - * - * 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); - __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; + int spdAddress; ROMSTAGE_CONST struct device *dev = dev_find_slot(0, PCI_DEVFN(0x18, 2)); ROMSTAGE_CONST struct northbridge_amd_agesa_family15tn_config *config = dev->chip_info; @@ -153,8 +49,11 @@ AGESA_STATUS AmdMemoryReadSPD (UINT32 unused1, UINT32 unused2, AGESA_READ_SPD_PA spdAddress = config->spdAddrLookup [info->SocketId] [info->MemChannelId] [info->DimmId]; - if (spdAddress == 0) return AGESA_ERROR; - ioBase = 0xB00; - setupFch (ioBase); - return readspd (ioBase, spdAddress, (void *) info->Buffer, 128); + if (spdAddress == 0) + return AGESA_ERROR; + + int err = hudson_readSpd(spdAddress, (void *) info->Buffer, 128); + if (err) + return AGESA_ERROR; + return AGESA_SUCCESS; } |