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-rw-r--r--config/coreboot/haswell/patches/0014-haswell-NRI-Add-write-leveling.patch689
1 files changed, 689 insertions, 0 deletions
diff --git a/config/coreboot/haswell/patches/0014-haswell-NRI-Add-write-leveling.patch b/config/coreboot/haswell/patches/0014-haswell-NRI-Add-write-leveling.patch
new file mode 100644
index 00000000..5a96cd1f
--- /dev/null
+++ b/config/coreboot/haswell/patches/0014-haswell-NRI-Add-write-leveling.patch
@@ -0,0 +1,689 @@
+From bebe0b74bede64b03aa1e3781310ef539465627b Mon Sep 17 00:00:00 2001
+From: Angel Pons <th3fanbus@gmail.com>
+Date: Sun, 8 May 2022 12:56:04 +0200
+Subject: [PATCH 14/20] haswell NRI: Add write leveling
+
+Implement JEDEC write leveling, which is done in two steps. The first
+step uses the JEDEC procedure to do "fine" write leveling, i.e. align
+the DQS phase to the clock signal. The second step performs a regular
+read-write test to correct "coarse" cycle errors.
+
+Change-Id: I27678523fe22c38173a688e2a4751c259a20f009
+Signed-off-by: Angel Pons <th3fanbus@gmail.com>
+---
+ .../intel/haswell/native_raminit/Makefile.mk | 1 +
+ .../haswell/native_raminit/raminit_main.c | 1 +
+ .../haswell/native_raminit/raminit_native.h | 10 +
+ .../train_jedec_write_leveling.c | 581 ++++++++++++++++++
+ .../intel/haswell/registers/mchbar.h | 2 +
+ 5 files changed, 595 insertions(+)
+ create mode 100644 src/northbridge/intel/haswell/native_raminit/train_jedec_write_leveling.c
+
+diff --git a/src/northbridge/intel/haswell/native_raminit/Makefile.mk b/src/northbridge/intel/haswell/native_raminit/Makefile.mk
+index c442be0728..40c2f5e014 100644
+--- a/src/northbridge/intel/haswell/native_raminit/Makefile.mk
++++ b/src/northbridge/intel/haswell/native_raminit/Makefile.mk
+@@ -16,5 +16,6 @@ romstage-y += setup_wdb.c
+ romstage-y += spd_bitmunching.c
+ romstage-y += testing_io.c
+ romstage-y += timings_refresh.c
++romstage-y += train_jedec_write_leveling.c
+ romstage-y += train_read_mpr.c
+ romstage-y += train_receive_enable.c
+diff --git a/src/northbridge/intel/haswell/native_raminit/raminit_main.c b/src/northbridge/intel/haswell/native_raminit/raminit_main.c
+index 264d1468f5..1ff23be615 100644
+--- a/src/northbridge/intel/haswell/native_raminit/raminit_main.c
++++ b/src/northbridge/intel/haswell/native_raminit/raminit_main.c
+@@ -62,6 +62,7 @@ static const struct task_entry cold_boot[] = {
+ { pre_training, true, "PRETRAIN", },
+ { train_receive_enable, true, "RCVET", },
+ { train_read_mpr, true, "RDMPRT", },
++ { train_jedec_write_leveling, true, "JWRL", },
+ };
+
+ /* Return a generic stepping value to make stepping checks simpler */
+diff --git a/src/northbridge/intel/haswell/native_raminit/raminit_native.h b/src/northbridge/intel/haswell/native_raminit/raminit_native.h
+index 49e9214656..86d89f2120 100644
+--- a/src/northbridge/intel/haswell/native_raminit/raminit_native.h
++++ b/src/northbridge/intel/haswell/native_raminit/raminit_native.h
+@@ -59,6 +59,9 @@
+ /* Specified in PI ticks. 64 PI ticks == 1 qclk */
+ #define tDQSCK_DRIFT 64
+
++/* Maximum additional latency */
++#define MAX_ADD_DELAY 2
++
+ enum margin_parameter {
+ RcvEna,
+ RdT,
+@@ -215,6 +218,7 @@ enum raminit_status {
+ RAMINIT_STATUS_REUT_ERROR,
+ RAMINIT_STATUS_RCVEN_FAILURE,
+ RAMINIT_STATUS_RMPR_FAILURE,
++ RAMINIT_STATUS_JWRL_FAILURE,
+ RAMINIT_STATUS_UNSPECIFIED_ERROR, /** TODO: Deprecated in favor of specific values **/
+ };
+
+@@ -380,6 +384,11 @@ static inline uint32_t get_data_train_feedback(const uint8_t channel, const uint
+ return mchbar_read32(DDR_DATA_TRAIN_FEEDBACK(channel, byte));
+ }
+
++static inline uint16_t get_byte_group_errors(const uint8_t channel)
++{
++ return mchbar_read32(4 + REUT_ch_ERR_MISC_STATUS(channel)) & 0x1ff;
++}
++
+ /* Number of ticks to wait in units of 69.841279 ns (citation needed) */
+ static inline void tick_delay(const uint32_t delay)
+ {
+@@ -437,6 +446,7 @@ enum raminit_status configure_memory_map(struct sysinfo *ctrl);
+ enum raminit_status do_jedec_init(struct sysinfo *ctrl);
+ enum raminit_status train_receive_enable(struct sysinfo *ctrl);
+ enum raminit_status train_read_mpr(struct sysinfo *ctrl);
++enum raminit_status train_jedec_write_leveling(struct sysinfo *ctrl);
+
+ void configure_timings(struct sysinfo *ctrl);
+ void configure_refresh(struct sysinfo *ctrl);
+diff --git a/src/northbridge/intel/haswell/native_raminit/train_jedec_write_leveling.c b/src/northbridge/intel/haswell/native_raminit/train_jedec_write_leveling.c
+new file mode 100644
+index 0000000000..ef6483e2bd
+--- /dev/null
++++ b/src/northbridge/intel/haswell/native_raminit/train_jedec_write_leveling.c
+@@ -0,0 +1,581 @@
++/* SPDX-License-Identifier: GPL-2.0-or-later */
++
++#include <assert.h>
++#include <console/console.h>
++#include <delay.h>
++#include <northbridge/intel/haswell/haswell.h>
++#include <types.h>
++
++#include "raminit_native.h"
++#include "ranges.h"
++
++#define JWLC_PLOT RAM_DEBUG
++#define JWRL_PLOT RAM_DEBUG
++
++static void reset_dram_dll(struct sysinfo *ctrl, const uint8_t channel, const uint8_t rank)
++{
++ const uint16_t mr0reg = ctrl->mr0[channel][rank / 2];
++ reut_issue_mrs(ctrl, channel, BIT(rank), 0, mr0reg | MR0_DLL_RESET);
++}
++
++static void program_wdb_pattern(struct sysinfo *ctrl, const bool invert)
++{
++ /* Pattern to keep DQ-DQS simple but detect any failures. Same as NHM/WSM. */
++ const uint8_t pat[4][2] = {
++ { 0x00, 0xff },
++ { 0xff, 0x00 },
++ { 0xc3, 0x3c },
++ { 0x3c, 0xc3 },
++ };
++ const uint8_t pmask[2][8] = {
++ { 0, 0, 1, 1, 1, 1, 0, 0 },
++ { 1, 1, 0, 0, 0, 0, 1, 1 },
++ };
++ for (uint8_t s = 0; s < ARRAY_SIZE(pat); s++)
++ write_wdb_fixed_pat(ctrl, pat[s], pmask[invert], ARRAY_SIZE(pmask[invert]), s);
++}
++
++static int16_t set_add_delay(uint32_t *add_delay, uint8_t rank, int8_t target_off)
++{
++ const uint8_t shift = rank * 2;
++ if (target_off > MAX_ADD_DELAY) {
++ *add_delay &= ~(3 << shift);
++ *add_delay |= MAX_ADD_DELAY << shift;
++ return 128 * (target_off - MAX_ADD_DELAY);
++ } else if (target_off < 0) {
++ *add_delay &= ~(3 << shift);
++ *add_delay |= 0 << shift;
++ return 128 * target_off;
++ } else {
++ *add_delay &= ~(3 << shift);
++ *add_delay |= target_off << shift;
++ return 0;
++ }
++}
++
++static enum raminit_status train_jedec_write_leveling_cleanup(struct sysinfo *ctrl)
++{
++ const struct reut_box reut_addr = {
++ .col = {
++ .start = 0,
++ .stop = 1023,
++ .inc_val = 1,
++ },
++ };
++ const struct wdb_pat wdb_pattern = {
++ .start_ptr = 0,
++ .stop_ptr = 3,
++ .inc_rate = 1,
++ .dq_pattern = BASIC_VA,
++ };
++ const int8_t offsets[] = { 0, 1, -1, 2, 3 };
++ const int8_t dq_offsets[] = { 0, -10, 10, -5, 5, -15, 15 };
++ const uint8_t dq_offset_max = ARRAY_SIZE(dq_offsets);
++
++ /* Set LFSR seeds to be sequential */
++ program_wdb_lfsr(ctrl, true);
++ setup_io_test(
++ ctrl,
++ ctrl->chanmap,
++ PAT_WR_RD,
++ 2,
++ 4,
++ &reut_addr,
++ NSOE,
++ &wdb_pattern,
++ 0,
++ 0);
++
++ const union reut_pat_wdb_cl_mux_cfg_reg reut_wdb_cl_mux_cfg = {
++ .mux_0_control = REUT_MUX_BTBUFFER,
++ .mux_1_control = REUT_MUX_BTBUFFER,
++ .mux_2_control = REUT_MUX_BTBUFFER,
++ .ecc_data_source_sel = 1,
++ };
++ for (uint8_t channel = 0; channel < NUM_CHANNELS; channel++) {
++ if (!does_ch_exist(ctrl, channel))
++ continue;
++
++ mchbar_write32(REUT_ch_PAT_WDB_CL_MUX_CFG(channel), reut_wdb_cl_mux_cfg.raw);
++ }
++
++ int8_t byte_off[NUM_CHANNELS][NUM_LANES] = { 0 };
++ uint32_t add_delay[NUM_CHANNELS] = { 0 };
++ enum raminit_status status = RAMINIT_STATUS_SUCCESS;
++ bool invert = false;
++ const uint16_t valid_byte_mask = BIT(ctrl->lanes) - 1;
++ for (uint8_t rank = 0; rank < NUM_SLOTRANKS; rank++) {
++ uint8_t chanmask = 0;
++ for (uint8_t channel = 0; channel < NUM_CHANNELS; channel++)
++ chanmask |= select_reut_ranks(ctrl, channel, BIT(rank));
++
++ if (!chanmask)
++ continue;
++
++ printk(BIOS_DEBUG, "Rank %u\n", rank);
++ printk(JWLC_PLOT, "Channel");
++ for (uint8_t channel = 0; channel < NUM_CHANNELS; channel++) {
++ if (!rank_in_ch(ctrl, rank, channel))
++ continue;
++
++ printk(JWLC_PLOT, "\t\t%u\t", channel);
++ }
++ printk(JWLC_PLOT, "\nByte\t");
++ for (uint8_t channel = 0; channel < NUM_CHANNELS; channel++) {
++ if (!rank_in_ch(ctrl, rank, channel))
++ continue;
++
++ printk(JWLC_PLOT, "\t");
++ for (uint8_t byte = 0; byte < ctrl->lanes; byte++)
++ printk(JWLC_PLOT, "%u ", byte);
++ }
++ printk(JWLC_PLOT, "\nDelay DqOffset");
++ bool done = false;
++ int8_t byte_sum[NUM_CHANNELS] = { 0 };
++ uint16_t byte_pass[NUM_CHANNELS] = { 0 };
++ for (uint8_t off = 0; off < ARRAY_SIZE(offsets); off++) {
++ for (uint8_t channel = 0; channel < NUM_CHANNELS; channel++) {
++ if (!rank_in_ch(ctrl, rank, channel))
++ continue;
++
++ const int16_t global_byte_off =
++ set_add_delay(&add_delay[channel], rank, offsets[off]);
++ for (uint8_t byte = 0; byte < ctrl->lanes; byte++) {
++ update_txt(ctrl, channel, rank, byte, TXT_DQDQS_OFF,
++ global_byte_off);
++ }
++ mchbar_write32(SC_WR_ADD_DELAY_ch(channel),
++ add_delay[channel]);
++ }
++ /* Reset FIFOs and DRAM DLL (Micron workaround) */
++ if (!ctrl->lpddr) {
++ io_reset();
++ for (uint8_t channel = 0; channel < NUM_CHANNELS; channel++) {
++ if (!rank_in_ch(ctrl, rank, channel))
++ continue;
++
++ reset_dram_dll(ctrl, channel, rank);
++ }
++ udelay(1);
++ }
++ for (uint8_t dq_offset = 0; dq_offset < dq_offset_max; dq_offset++) {
++ printk(JWLC_PLOT, "\n% 3d\t% 3d",
++ offsets[off], dq_offsets[dq_offset]);
++ change_1d_margin_multicast(
++ ctrl,
++ WrT,
++ dq_offsets[dq_offset],
++ rank,
++ false,
++ REG_FILE_USE_RANK);
++
++ /*
++ * Re-program the WDB pattern. Change the pattern
++ * for the next test to avoid false pass issues.
++ */
++ program_wdb_pattern(ctrl, invert);
++ invert = !invert;
++ run_io_test(ctrl, chanmask, BASIC_VA, true);
++ done = true;
++ for (uint8_t channel = 0; channel < NUM_CHANNELS; channel++) {
++ if (!rank_in_ch(ctrl, rank, channel))
++ continue;
++
++ printk(JWLC_PLOT, "\t");
++ uint16_t result = get_byte_group_errors(channel);
++ result &= valid_byte_mask;
++
++ /* Skip bytes that have failed or already passed */
++ const uint16_t skip_me = result | byte_pass[channel];
++ for (uint8_t byte = 0; byte < ctrl->lanes; byte++) {
++ const bool pass = result & BIT(byte);
++ printk(JWLC_PLOT, pass ? "# " : ". ");
++ if (skip_me & BIT(byte))
++ continue;
++
++ byte_pass[channel] |= BIT(byte);
++ byte_off[channel][byte] = offsets[off];
++ byte_sum[channel] += offsets[off];
++ }
++ if (byte_pass[channel] != valid_byte_mask)
++ done = false;
++ }
++ if (done)
++ break;
++ }
++ if (done)
++ break;
++ }
++ printk(BIOS_DEBUG, "\n\n");
++ if (!done) {
++ printk(BIOS_ERR, "JWLC: Could not find a pass for all bytes\n");
++ for (uint8_t channel = 0; channel < NUM_CHANNELS; channel++) {
++ if (!rank_in_ch(ctrl, rank, channel))
++ continue;
++
++ printk(BIOS_ERR, "Channel %u, rank %u fail:", channel, rank);
++ const uint16_t passing_mask = byte_pass[channel];
++ for (uint8_t byte = 0; byte < ctrl->lanes; byte++) {
++ if (BIT(byte) & passing_mask)
++ continue;
++
++ printk(BIOS_ERR, " %u", byte);
++ }
++ printk(BIOS_ERR, "\n");
++ }
++ status = RAMINIT_STATUS_JWRL_FAILURE;
++ break;
++ }
++ for (uint8_t channel = 0; channel < NUM_CHANNELS; channel++) {
++ if (!rank_in_ch(ctrl, rank, channel))
++ continue;
++
++ /* Refine target offset to make sure it works for all bytes */
++ int8_t target_off = DIV_ROUND_CLOSEST(byte_sum[channel], ctrl->lanes);
++ int16_t global_byte_off = 0;
++ uint8_t all_good_loops = 0;
++ bool all_good = 0;
++ while (!all_good) {
++ global_byte_off =
++ set_add_delay(&add_delay[channel], rank, target_off);
++ all_good = true;
++ for (uint8_t byte = 0; byte < ctrl->lanes; byte++) {
++ int16_t local_offset;
++ local_offset = byte_off[channel][byte] - target_off;
++ local_offset = local_offset * 128 + global_byte_off;
++ const uint16_t tx_dq = ctrl->tx_dq[channel][rank][byte];
++ if (tx_dq + local_offset >= (512 - 64)) {
++ all_good = false;
++ all_good_loops++;
++ target_off++;
++ break;
++ }
++ const uint16_t txdqs = ctrl->tx_dq[channel][rank][byte];
++ if (txdqs + local_offset < 96) {
++ all_good = false;
++ all_good_loops++;
++ target_off--;
++ break;
++ }
++ }
++ /* Avoid an infinite loop */
++ if (all_good_loops > 3)
++ break;
++ }
++ if (!all_good) {
++ printk(BIOS_ERR, "JWLC: Target offset refining failed\n");
++ status = RAMINIT_STATUS_JWRL_FAILURE;
++ break;
++ }
++ printk(BIOS_DEBUG, "C%u.R%u: Offset\tFinalEdge\n", channel, rank);
++ for (uint8_t byte = 0; byte < ctrl->lanes; byte++) {
++ int16_t local_offset;
++ local_offset = byte_off[channel][byte] - target_off;
++ local_offset = local_offset * 128 + global_byte_off;
++ ctrl->tx_dq[channel][rank][byte] += local_offset;
++ ctrl->txdqs[channel][rank][byte] += local_offset;
++ update_txt(ctrl, channel, rank, byte, TXT_RESTORE, 0);
++ printk(BIOS_DEBUG, " B%u: %d\t%d\n", byte, local_offset,
++ ctrl->txdqs[channel][rank][byte]);
++ }
++ mchbar_write32(SC_WR_ADD_DELAY_ch(channel), add_delay[channel]);
++ if (!ctrl->lpddr) {
++ reset_dram_dll(ctrl, channel, rank);
++ udelay(1);
++ }
++ printk(BIOS_DEBUG, "\n");
++ }
++ printk(BIOS_DEBUG, "\n");
++ }
++
++ /* Restore WDB after test */
++ write_wdb_va_pat(ctrl, 0, BASIC_VA_PAT_SPREAD_8, 8, 0);
++ program_wdb_lfsr(ctrl, false);
++ mchbar_write32(DDR_DATA_OFFSET_TRAIN, 0);
++
++ /** TODO: Do full JEDEC init instead? **/
++ io_reset();
++ return status;
++}
++
++static enum raminit_status verify_wl_width(const int32_t lwidth)
++{
++ if (lwidth <= 32) {
++ /* Check if width is valid */
++ printk(BIOS_ERR, "WrLevel: Width region (%d) too small\n", lwidth);
++ return RAMINIT_STATUS_JWRL_FAILURE;
++ }
++ if (lwidth >= 96) {
++ /* Since we're calibrating a phase, a too large region is a problem */
++ printk(BIOS_ERR, "WrLevel: Width region (%d) too large\n", lwidth);
++ return RAMINIT_STATUS_JWRL_FAILURE;
++ }
++ return 0;
++}
++
++enum raminit_status train_jedec_write_leveling(struct sysinfo *ctrl)
++{
++ /*
++ * Enabling WL mode causes DQS to toggle for 1024 QCLK.
++ * Wait for this to stop. Round up to nearest microsecond.
++ */
++ const bool wl_long_delay = ctrl->lpddr;
++ const uint32_t dqs_toggle_time = wl_long_delay ? 2048 : 1024;
++ const uint32_t wait_time_us = DIV_ROUND_UP(ctrl->qclkps * dqs_toggle_time, 1000 * 1000);
++
++ const uint16_t wl_start = 192;
++ const uint16_t wl_stop = 192 + 128;
++ const uint16_t wl_step = 2;
++
++ /* Do not use cached MR values */
++ const bool save_restore_mrs = ctrl->restore_mrs;
++ ctrl->restore_mrs = 0;
++
++ /* Propagate delay values (without a write command) */
++ for (uint8_t channel = 0; channel < NUM_CHANNELS; channel++) {
++ if (!does_ch_exist(ctrl, channel))
++ continue;
++
++ /* Propagate delay values from rank 0 to prevent assertion failures in RTL */
++ union ddr_data_control_0_reg data_control_0 = {
++ .raw = ctrl->dq_control_0[channel],
++ };
++ data_control_0.read_rf_rd = 0;
++ data_control_0.read_rf_wr = 1;
++ data_control_0.read_rf_rank = 0;
++ mchbar_write32(DDR_DATA_ch_CONTROL_0(channel), data_control_0.raw);
++ for (uint8_t byte = 0; byte < ctrl->lanes; byte++) {
++ union ddr_data_control_2_reg data_control_2 = {
++ .raw = ctrl->dq_control_2[channel][byte],
++ };
++ data_control_2.force_bias_on = 1;
++ data_control_2.force_rx_on = 0;
++ data_control_2.wl_long_delay = wl_long_delay;
++ mchbar_write32(DQ_CONTROL_2(channel, byte), data_control_2.raw);
++ }
++ }
++
++ if (ctrl->lpddr)
++ die("%s: Missing LPDDR support\n", __func__);
++
++ if (!ctrl->lpddr)
++ ddr3_program_mr1(ctrl, 0, 1);
++
++ enum raminit_status status = RAMINIT_STATUS_SUCCESS;
++ struct phase_train_data region_data[NUM_CHANNELS][NUM_LANES] = { 0 };
++ for (uint8_t rank = 0; rank < NUM_SLOTRANKS; rank++) {
++ if (!does_rank_exist(ctrl, rank))
++ continue;
++
++ for (uint8_t channel = 0; channel < NUM_CHANNELS; channel++) {
++ if (!rank_in_ch(ctrl, rank, channel))
++ continue;
++
++ /** TODO: Differs for LPDDR **/
++ uint16_t mr1reg = ctrl->mr1[channel][rank / 2];
++ mr1reg &= ~MR1_QOFF_ENABLE;
++ mr1reg |= MR1_WL_ENABLE;
++ if (is_hsw_ult()) {
++ mr1reg &= ~RTTNOM_MASK;
++ mr1reg |= encode_ddr3_rttnom(120);
++ } else if (ctrl->dpc[channel] == 2) {
++ mr1reg &= ~RTTNOM_MASK;
++ mr1reg |= encode_ddr3_rttnom(60);
++ }
++ reut_issue_mrs(ctrl, channel, BIT(rank), 1, mr1reg);
++
++ /* Assert ODT for myself */
++ uint8_t odt_matrix = BIT(rank);
++ if (ctrl->dpc[channel] == 2) {
++ /* Assert ODT for non-target DIMM */
++ const uint8_t other_dimm = ((rank + 2) / 2) & 1;
++ odt_matrix |= BIT(2 * other_dimm);
++ }
++
++ union reut_misc_odt_ctrl_reg reut_misc_odt_ctrl = {
++ .raw = 0,
++ };
++ if (ctrl->lpddr) {
++ /* Only one ODT pin for ULT */
++ reut_misc_odt_ctrl.odt_on = 1;
++ reut_misc_odt_ctrl.odt_override = 1;
++ } else if (!is_hsw_ult()) {
++ reut_misc_odt_ctrl.odt_on = odt_matrix;
++ reut_misc_odt_ctrl.odt_override = 0xf;
++ }
++ mchbar_write32(REUT_ch_MISC_ODT_CTRL(channel), reut_misc_odt_ctrl.raw);
++ }
++ for (uint8_t channel = 0; channel < NUM_CHANNELS; channel++) {
++ if (!rank_in_ch(ctrl, rank, channel))
++ continue;
++
++ /*
++ * Enable write leveling mode in DDR and propagate delay
++ * values (without a write command). Stay in WL mode.
++ */
++ union ddr_data_control_0_reg data_control_0 = {
++ .raw = ctrl->dq_control_0[channel],
++ };
++ data_control_0.wl_training_mode = 1;
++ data_control_0.tx_pi_on = 1;
++ data_control_0.read_rf_rd = 0;
++ data_control_0.read_rf_wr = 1;
++ data_control_0.read_rf_rank = rank;
++ mchbar_write32(DDR_DATA_ch_CONTROL_0(channel), data_control_0.raw);
++ }
++ printk(BIOS_DEBUG, "\nRank %u\n", rank);
++ printk(JWRL_PLOT, "Channel\t");
++ for (uint8_t channel = 0; channel < NUM_CHANNELS; channel++) {
++ if (!rank_in_ch(ctrl, rank, channel))
++ continue;
++
++ printk(JWRL_PLOT, "%u", channel);
++ if (channel > 0)
++ continue;
++
++ for (uint8_t byte = 0; byte < ctrl->lanes; byte++)
++ printk(JWRL_PLOT, "\t");
++ }
++ printk(JWRL_PLOT, "\nByte");
++ for (uint8_t channel = 0; channel < NUM_CHANNELS; channel++) {
++ if (!rank_in_ch(ctrl, rank, channel))
++ continue;
++
++ for (uint8_t byte = 0; byte < ctrl->lanes; byte++)
++ printk(JWRL_PLOT, "\t%u", byte);
++ }
++ printk(JWRL_PLOT, "\nWlDelay");
++ for (uint16_t wl_delay = wl_start; wl_delay < wl_stop; wl_delay += wl_step) {
++ printk(JWRL_PLOT, "\n %3u:", wl_delay);
++ for (uint8_t channel = 0; channel < NUM_CHANNELS; channel++) {
++ if (!rank_in_ch(ctrl, rank, channel))
++ continue;
++
++ for (uint8_t byte = 0; byte < ctrl->lanes; byte++) {
++ update_txt(ctrl, channel, rank, byte, TXT_TXDQS,
++ wl_delay);
++ }
++ }
++ /* Wait for the first burst to finish */
++ if (wl_delay == wl_start)
++ udelay(wait_time_us);
++
++ io_reset();
++ udelay(wait_time_us);
++ for (uint8_t channel = 0; channel < NUM_CHANNELS; channel++) {
++ if (!rank_in_ch(ctrl, rank, channel))
++ continue;
++
++ for (uint8_t byte = 0; byte < ctrl->lanes; byte++) {
++ const uint32_t feedback =
++ get_data_train_feedback(channel, byte);
++ const bool pass = (feedback & 0x1ff) >= 16;
++ printk(JWRL_PLOT, "\t%c%u", pass ? '.' : '#', feedback);
++ phase_record_pass(
++ &region_data[channel][byte],
++ pass,
++ wl_delay,
++ wl_start,
++ wl_step);
++ }
++ }
++ }
++ printk(JWRL_PLOT, "\n");
++ printk(BIOS_DEBUG, "\n\tInitSt\tInitEn\tCurrSt\tCurrEn\tLargSt\tLargEn\n");
++ for (uint8_t channel = 0; channel < NUM_CHANNELS; channel++) {
++ if (!rank_in_ch(ctrl, rank, channel))
++ continue;
++
++ printk(BIOS_DEBUG, "C%u\n", channel);
++ for (uint8_t byte = 0; byte < ctrl->lanes; byte++) {
++ struct phase_train_data *data = &region_data[channel][byte];
++
++ phase_append_initial_to_current(data, wl_start, wl_step);
++ printk(BIOS_DEBUG, " B%u:\t%d\t%d\t%d\t%d\t%d\t%d\n",
++ byte,
++ data->initial.start,
++ data->initial.end,
++ data->current.start,
++ data->current.end,
++ data->largest.start,
++ data->largest.end);
++ }
++ }
++
++ /*
++ * Clean up after test. Very coarsely adjust for
++ * any cycle errors. Program values for TxDQS.
++ */
++ for (uint8_t channel = 0; channel < NUM_CHANNELS; channel++) {
++ if (!rank_in_ch(ctrl, rank, channel))
++ continue;
++
++ /* Clear ODT before MRS (JEDEC spec) */
++ mchbar_write32(REUT_ch_MISC_ODT_CTRL(channel), 0);
++
++ /** TODO: Differs for LPDDR **/
++ const uint16_t mr1reg = ctrl->mr1[channel][rank / 2] | MR1_QOFF_ENABLE;
++ reut_issue_mrs(ctrl, channel, BIT(rank), 1, mr1reg);
++
++ printk(BIOS_DEBUG, "\nC%u.R%u: LftEdge Width\n", channel, rank);
++ const bool rank_x16 = ctrl->dimms[channel][rank / 2].data.width == 16;
++ for (uint8_t byte = 0; byte < ctrl->lanes; byte++) {
++ struct phase_train_data *data = &region_data[channel][byte];
++ const int32_t lwidth = range_width(data->largest);
++ int32_t tx_start = data->largest.start;
++ printk(BIOS_DEBUG, " B%u: %d\t%d\n", byte, tx_start, lwidth);
++ status = verify_wl_width(lwidth);
++ if (status) {
++ printk(BIOS_ERR,
++ "WrLevel problems on channel %u, byte %u\n",
++ channel, byte);
++ goto clean_up;
++ }
++
++ /* Align byte pairs if DIMM is x16 */
++ if (rank_x16 && (byte & 1)) {
++ const struct phase_train_data *const ref_data =
++ &region_data[channel][byte - 1];
++
++ if (tx_start > ref_data->largest.start + 64)
++ tx_start -= 128;
++
++ if (tx_start < ref_data->largest.start - 64)
++ tx_start += 128;
++ }
++
++ /* Fix for b4618067 - need to add 1 QCLK to DQS PI */
++ if (is_hsw_ult())
++ tx_start += 64;
++
++ assert(tx_start >= 0);
++ ctrl->txdqs[channel][rank][byte] = tx_start;
++ ctrl->tx_dq[channel][rank][byte] = tx_start + 32;
++ update_txt(ctrl, channel, rank, byte, TXT_RESTORE, 0);
++ }
++ }
++ printk(BIOS_DEBUG, "\n");
++ }
++
++clean_up:
++ for (uint8_t channel = 0; channel < NUM_CHANNELS; channel++) {
++ if (!does_ch_exist(ctrl, channel))
++ continue;
++
++ mchbar_write32(DDR_DATA_ch_CONTROL_0(channel), ctrl->dq_control_0[channel]);
++ for (uint8_t byte = 0; byte < ctrl->lanes; byte++) {
++ mchbar_write32(DQ_CONTROL_2(channel, byte),
++ ctrl->dq_control_2[channel][byte]);
++ }
++ }
++ if (!ctrl->lpddr)
++ ddr3_program_mr1(ctrl, 0, 0);
++
++ ctrl->restore_mrs = save_restore_mrs;
++
++ if (status)
++ return status;
++
++ /** TODO: If this step fails and dec_wrd is set, clear it and try again **/
++ return train_jedec_write_leveling_cleanup(ctrl);
++}
+diff --git a/src/northbridge/intel/haswell/registers/mchbar.h b/src/northbridge/intel/haswell/registers/mchbar.h
+index 6a31d3a32c..7c0b5a49de 100644
+--- a/src/northbridge/intel/haswell/registers/mchbar.h
++++ b/src/northbridge/intel/haswell/registers/mchbar.h
+@@ -121,6 +121,8 @@
+
+ #define REUT_ch_ERR_DATA_MASK(ch) _MCMAIN_C(0x40d8, ch)
+
++#define REUT_ch_ERR_MISC_STATUS(ch) _MCMAIN_C(0x40e8, ch)
++
+ #define REUT_ch_MISC_CKE_CTRL(ch) _MCMAIN_C(0x4190, ch)
+ #define REUT_ch_MISC_ODT_CTRL(ch) _MCMAIN_C(0x4194, ch)
+ #define REUT_ch_MISC_PAT_CADB_CTRL(ch) _MCMAIN_C(0x4198, ch)
+--
+2.39.2
+
generated by cgit v1.2.1 (git 2.18.0) at 2024-05-18 15:24:49 +0000