diff options
Diffstat (limited to 'src/northbridge/amd')
| -rw-r--r-- | src/northbridge/amd/amdmct/mct_ddr3/mctsrc.c | 49 |
1 files changed, 28 insertions, 21 deletions
diff --git a/src/northbridge/amd/amdmct/mct_ddr3/mctsrc.c b/src/northbridge/amd/amdmct/mct_ddr3/mctsrc.c index c8c75e1051..f0ee6afedd 100644 --- a/src/northbridge/amd/amdmct/mct_ddr3/mctsrc.c +++ b/src/northbridge/amd/amdmct/mct_ddr3/mctsrc.c @@ -1194,6 +1194,7 @@ static void dqsTrainRcvrEn_SW_Fam15(struct MCTStatStruc *pMCTstat, uint16_t initial_seed; uint8_t train_both_nibbles; uint16_t current_total_delay[MAX_BYTE_LANES]; + uint16_t nibble0_current_total_delay[MAX_BYTE_LANES]; uint16_t dqs_ret_pass1_total_delay[MAX_BYTE_LANES]; uint16_t rank0_current_total_delay[MAX_BYTE_LANES]; uint16_t phase_recovery_delays[MAX_BYTE_LANES]; @@ -1419,19 +1420,11 @@ static void dqsTrainRcvrEn_SW_Fam15(struct MCTStatStruc *pMCTstat, for (lane = 0; lane < lane_count; lane++) { current_total_delay[lane] = (phase_recovery_delays[lane] & 0x1f); current_total_delay[lane] |= ((seed_gross[lane] + ((phase_recovery_delays[lane] >> 5) & 0x1f) - seed_pre_gross[lane] + 1) << 5); - if (nibble == 0) { - if (lane == 8) - pDCTstat->CH_D_BC_RCVRDLY[Channel][dimm] = current_total_delay[lane]; - else - pDCTstat->CH_D_B_RCVRDLY[Channel][dimm][lane] = current_total_delay[lane]; - } else { + if (nibble == 1) { /* 2.10.5.8.2 (1) * Average the trained values of both nibbles on x4 DIMMs */ - if (lane == 8) - pDCTstat->CH_D_BC_RCVRDLY[Channel][dimm] = (pDCTstat->CH_D_BC_RCVRDLY[Channel][dimm] + current_total_delay[lane]) / 2; - else - pDCTstat->CH_D_B_RCVRDLY[Channel][dimm][lane] = (pDCTstat->CH_D_B_RCVRDLY[Channel][dimm][lane] + current_total_delay[lane]) / 2; + current_total_delay[lane] = (nibble0_current_total_delay[lane] + current_total_delay[lane]) / 2; } } @@ -1441,26 +1434,40 @@ static void dqsTrainRcvrEn_SW_Fam15(struct MCTStatStruc *pMCTstat, Channel, dimm, nibble, lane, current_total_delay[lane], pDCTstat->CH_D_B_RCVRDLY[Channel][dimm][lane]); #endif write_dqs_receiver_enable_control_registers(current_total_delay, dev, Channel, dimm, index_reg); - } - if (rank == 0) { - /* Back up the Rank 0 delays for later use */ - memcpy(rank0_current_total_delay, current_total_delay, sizeof(current_total_delay)); + if (nibble == 0) { + /* Back up the Nibble 0 delays for later use */ + memcpy(nibble0_current_total_delay, current_total_delay, sizeof(current_total_delay)); + } } - if (rank == 1) { - /* 2.10.5.8.2 (8) - * Compute the average delay across both ranks and program the result into - * the DQS Receiver Enable delay registers - */ + if (_2Ranks) { + if (rank == 0) { + /* Back up the Rank 0 delays for later use */ + memcpy(rank0_current_total_delay, current_total_delay, sizeof(current_total_delay)); + } + if (rank == 1) { + /* 2.10.5.8.2 (8) + * Compute the average delay across both ranks and program the result into + * the DQS Receiver Enable delay registers + */ + for (lane = 0; lane < lane_count; lane++) { + current_total_delay[lane] = (rank0_current_total_delay[lane] + current_total_delay[lane]) / 2; + if (lane == 8) + pDCTstat->CH_D_BC_RCVRDLY[Channel][dimm] = current_total_delay[lane]; + else + pDCTstat->CH_D_B_RCVRDLY[Channel][dimm][lane] = current_total_delay[lane]; + } + write_dqs_receiver_enable_control_registers(current_total_delay, dev, Channel, dimm, index_reg); + } + } else { + /* Save the current delay for later use by other routines */ for (lane = 0; lane < lane_count; lane++) { - current_total_delay[lane] = (rank0_current_total_delay[lane] + current_total_delay[lane]) / 2; if (lane == 8) pDCTstat->CH_D_BC_RCVRDLY[Channel][dimm] = current_total_delay[lane]; else pDCTstat->CH_D_B_RCVRDLY[Channel][dimm][lane] = current_total_delay[lane]; } - write_dqs_receiver_enable_control_registers(current_total_delay, dev, Channel, dimm, index_reg); } } |