nb/intel/sandybridge: Make helper for write leveling sequence
Encapsulate the IOSAV sequence into a helper to help reduce clutter.
Tested on Asus P8H61-M PRO, still boots.
Change-Id: I58595a5c53fcdc3f29fa55b015a82cbfe85cd6cb
Signed-off-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/47615
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>
diff --git a/src/northbridge/intel/sandybridge/raminit_iosav.c b/src/northbridge/intel/sandybridge/raminit_iosav.c
index 11b2acb..25f5ae7 100644
--- a/src/northbridge/intel/sandybridge/raminit_iosav.c
+++ b/src/northbridge/intel/sandybridge/raminit_iosav.c
@@ -199,6 +199,93 @@
iosav_write_sequence(channel, sequence, ARRAY_SIZE(sequence));
}
+void iosav_write_jedec_write_leveling_sequence(
+ ramctr_timing *ctrl, int channel, int slotrank, int bank, u32 mr1reg)
+{
+ /* First DQS/DQS# rising edge after write leveling mode is programmed */
+ const u32 tWLMRD = 40;
+
+ const struct iosav_ssq sequence[] = {
+ /* 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,
+ },
+ .subseq_ctrl = {
+ .cmd_executions = 1,
+ .cmd_delay_gap = 3,
+ .post_ssq_wait = ctrl->CWL + ctrl->tWLO,
+ .data_direction = SSQ_WR,
+ },
+ .sp_cmd_addr = {
+ .address = 8,
+ .rowbits = 0,
+ .bank = 0,
+ .rank = slotrank,
+ },
+ },
+ /* DRAM command NOP */
+ [2] = {
+ .sp_cmd_ctrl = {
+ .command = IOSAV_NOP_ALT,
+ .ranksel_ap = 1,
+ },
+ .subseq_ctrl = {
+ .cmd_executions = 1,
+ .cmd_delay_gap = 3,
+ .post_ssq_wait = ctrl->CAS + 38,
+ .data_direction = SSQ_RD,
+ },
+ .sp_cmd_addr = {
+ .address = 4,
+ .rowbits = 0,
+ .bank = 0,
+ .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));
+}
+
void iosav_write_misc_write_sequence(ramctr_timing *ctrl, int channel, int slotrank,
u32 gap0, u32 loops0, u32 gap1, u32 loops2, u32 wrap2)
{