diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/northbridge/intel/sandybridge/raminit_common.c | 56 |
1 files changed, 48 insertions, 8 deletions
diff --git a/src/northbridge/intel/sandybridge/raminit_common.c b/src/northbridge/intel/sandybridge/raminit_common.c index 885689c94f..92d0c4f47d 100644 --- a/src/northbridge/intel/sandybridge/raminit_common.c +++ b/src/northbridge/intel/sandybridge/raminit_common.c @@ -1696,15 +1696,40 @@ static void precharge(ramctr_timing *ctrl) static void test_timB(ramctr_timing *ctrl, int channel, int slotrank) { - /* enable DQs on this slotrank */ - write_mrreg(ctrl, channel, slotrank, 1, make_mr1(ctrl, slotrank, channel) | 1 << 7); + /* First DQS/DQS# rising edge after write leveling mode is programmed */ + const u32 tWLMRD = 40; + + u32 mr1reg = make_mr1(ctrl, slotrank, channel) | 1 << 7; + int bank = 1; + + if (ctrl->rank_mirror[channel][slotrank]) + ddr3_mirror_mrreg(&bank, &mr1reg); wait_for_iosav(channel); const struct iosav_ssq sequence[] = { - /* DRAM command NOP */ + /* DRAM command MRS: enable DQs on this slotrank */ [0] = { .sp_cmd_ctrl = { + .command = IOSAV_MRS, + .ranksel_ap = 1, + }, + .subseq_ctrl = { + .cmd_executions = 1, + .cmd_delay_gap = 3, + .post_ssq_wait = tWLMRD, + .data_direction = SSQ_NA, + }, + .sp_cmd_addr = { + .address = mr1reg, + .rowbits = 6, + .bank = bank, + .rank = slotrank, + }, + }, + /* DRAM command NOP */ + [1] = { + .sp_cmd_ctrl = { .command = IOSAV_NOP, .ranksel_ap = 1, }, @@ -1722,7 +1747,7 @@ static void test_timB(ramctr_timing *ctrl, int channel, int slotrank) }, }, /* DRAM command NOP */ - [1] = { + [2] = { .sp_cmd_ctrl = { .command = IOSAV_NOP_ALT, .ranksel_ap = 1, @@ -1740,6 +1765,25 @@ static void test_timB(ramctr_timing *ctrl, int channel, int slotrank) .rank = slotrank, }, }, + /* DRAM command MRS: disable DQs on this slotrank */ + [3] = { + .sp_cmd_ctrl = { + .command = IOSAV_MRS, + .ranksel_ap = 1, + }, + .subseq_ctrl = { + .cmd_executions = 1, + .cmd_delay_gap = 3, + .post_ssq_wait = ctrl->tMOD, + .data_direction = SSQ_NA, + }, + .sp_cmd_addr = { + .address = mr1reg | 1 << 12, + .rowbits = 6, + .bank = bank, + .rank = slotrank, + }, + }, }; iosav_write_sequence(channel, sequence, ARRAY_SIZE(sequence)); @@ -1747,10 +1791,6 @@ static void test_timB(ramctr_timing *ctrl, int channel, int slotrank) iosav_run_once(channel); wait_for_iosav(channel); - - /* disable DQs on this slotrank */ - write_mrreg(ctrl, channel, slotrank, 1, - make_mr1(ctrl, slotrank, channel) | 1 << 12 | 1 << 7); } static int discover_timB(ramctr_timing *ctrl, int channel, int slotrank) |