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-rw-r--r--config/coreboot/haswell/patches/0013-haswell-NRI-Add-read-MPR-training.patch332
1 files changed, 332 insertions, 0 deletions
diff --git a/config/coreboot/haswell/patches/0013-haswell-NRI-Add-read-MPR-training.patch b/config/coreboot/haswell/patches/0013-haswell-NRI-Add-read-MPR-training.patch
new file mode 100644
index 00000000..5f154bcc
--- /dev/null
+++ b/config/coreboot/haswell/patches/0013-haswell-NRI-Add-read-MPR-training.patch
@@ -0,0 +1,332 @@
+From e263f0d2e9d6d016d603342651da261bbcb6af1f Mon Sep 17 00:00:00 2001
+From: Angel Pons <th3fanbus@gmail.com>
+Date: Sun, 8 May 2022 11:35:49 +0200
+Subject: [PATCH 13/20] haswell NRI: Add read MPR training
+
+Implement read training using DDR3 MPR (Multi-Purpose Register).
+
+Change-Id: Id17cb2c4c399ac9bcc937b595b58f863c152461b
+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 | 4 +
+ .../haswell/native_raminit/train_read_mpr.c | 241 ++++++++++++++++++
+ .../intel/haswell/registers/mchbar.h | 2 +-
+ 5 files changed, 248 insertions(+), 1 deletion(-)
+ create mode 100644 src/northbridge/intel/haswell/native_raminit/train_read_mpr.c
+
+diff --git a/src/northbridge/intel/haswell/native_raminit/Makefile.mk b/src/northbridge/intel/haswell/native_raminit/Makefile.mk
+index e2fbfb4211..c442be0728 100644
+--- a/src/northbridge/intel/haswell/native_raminit/Makefile.mk
++++ b/src/northbridge/intel/haswell/native_raminit/Makefile.mk
+@@ -16,4 +16,5 @@ romstage-y += setup_wdb.c
+ romstage-y += spd_bitmunching.c
+ romstage-y += testing_io.c
+ romstage-y += timings_refresh.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 7d444659c3..264d1468f5 100644
+--- a/src/northbridge/intel/haswell/native_raminit/raminit_main.c
++++ b/src/northbridge/intel/haswell/native_raminit/raminit_main.c
+@@ -61,6 +61,7 @@ static const struct task_entry cold_boot[] = {
+ { do_jedec_init, true, "JEDECINIT", },
+ { pre_training, true, "PRETRAIN", },
+ { train_receive_enable, true, "RCVET", },
++ { train_read_mpr, true, "RDMPRT", },
+ };
+
+ /* 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 5242b16f28..49e9214656 100644
+--- a/src/northbridge/intel/haswell/native_raminit/raminit_native.h
++++ b/src/northbridge/intel/haswell/native_raminit/raminit_native.h
+@@ -27,6 +27,8 @@
+ /* Always use 12 legs for emphasis (not trained) */
+ #define TXEQFULLDRV (3 << 4)
+
++#define LOOPCOUNT_INFINITE 0xff
++
+ /* DDR3 mode register bits */
+ #define MR0_DLL_RESET BIT(8)
+
+@@ -212,6 +214,7 @@ enum raminit_status {
+ RAMINIT_STATUS_POLL_TIMEOUT,
+ RAMINIT_STATUS_REUT_ERROR,
+ RAMINIT_STATUS_RCVEN_FAILURE,
++ RAMINIT_STATUS_RMPR_FAILURE,
+ RAMINIT_STATUS_UNSPECIFIED_ERROR, /** TODO: Deprecated in favor of specific values **/
+ };
+
+@@ -433,6 +436,7 @@ enum raminit_status configure_mc(struct sysinfo *ctrl);
+ 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);
+
+ void configure_timings(struct sysinfo *ctrl);
+ void configure_refresh(struct sysinfo *ctrl);
+diff --git a/src/northbridge/intel/haswell/native_raminit/train_read_mpr.c b/src/northbridge/intel/haswell/native_raminit/train_read_mpr.c
+new file mode 100644
+index 0000000000..ade1e36148
+--- /dev/null
++++ b/src/northbridge/intel/haswell/native_raminit/train_read_mpr.c
+@@ -0,0 +1,241 @@
++/* SPDX-License-Identifier: GPL-2.0-or-later */
++
++#include <commonlib/bsd/clamp.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 RMPR_START (-32)
++#define RMPR_STOP (32)
++#define RMPR_STEP 1
++
++#define RMPR_MIN_WIDTH 12
++
++#define RMPR_PLOT RAM_DEBUG
++
++/*
++ * Clear rx_training_mode. For LPDDR, we first need to disable odt_samp_extend_en,
++ * then disable rx_training_mode, and finally re-enable odt_samp_extend_en.
++ */
++static void clear_rx_training_mode(struct sysinfo *ctrl, const uint8_t 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) {
++ union ddr_data_control_0_reg data_control_0 = {
++ .raw = mchbar_read32(DDR_DATA_ch_CONTROL_0(channel)),
++ };
++ data_control_0.odt_samp_extend_en = 0;
++ mchbar_write32(DDR_DATA_ch_CONTROL_0(channel), data_control_0.raw);
++ tick_delay(1);
++ data_control_0.rx_training_mode = 0;
++ mchbar_write32(DDR_DATA_ch_CONTROL_0(channel), data_control_0.raw);
++ tick_delay(1);
++ }
++ mchbar_write32(DDR_DATA_ch_CONTROL_0(channel), ctrl->dq_control_0[channel]);
++}
++
++static void set_rxdqs_edges_to_midpoint(struct sysinfo *ctrl)
++{
++ for (uint8_t channel = 0; channel < NUM_CHANNELS; channel++) {
++ if (!does_ch_exist(ctrl, channel))
++ continue;
++
++ for (uint8_t rank = 0; rank < NUM_SLOTRANKS; rank++) {
++ if (!rank_in_ch(ctrl, rank, channel))
++ continue;
++
++ for (uint8_t byte = 0; byte < ctrl->lanes; byte++)
++ update_rxt(ctrl, channel, rank, byte, RXT_RXDQS_BOTH, 32);
++ }
++ }
++}
++
++static void enter_mpr_train_ddr_mode(struct sysinfo *ctrl, const uint8_t rank)
++{
++ /* Program MR3 and mask RAS/WE to prevent scheduler from issuing non-read commands */
++ for (uint8_t channel = 0; channel < NUM_CHANNELS; channel++) {
++ if (!rank_in_ch(ctrl, rank, channel))
++ continue;
++
++ if (!ctrl->lpddr)
++ reut_issue_mrs(ctrl, channel, BIT(rank), 3, 1 << 2);
++
++ union reut_misc_odt_ctrl_reg reut_misc_odt_ctrl = {
++ .raw = mchbar_read32(REUT_ch_MISC_ODT_CTRL(channel)),
++ };
++ reut_misc_odt_ctrl.mpr_train_ddr_on = 1;
++ mchbar_write32(REUT_ch_MISC_ODT_CTRL(channel), reut_misc_odt_ctrl.raw);
++ }
++}
++
++static void leave_mpr_train_ddr_mode(struct sysinfo *ctrl, const uint8_t rank)
++{
++ for (uint8_t channel = 0; channel < NUM_CHANNELS; channel++) {
++ if (!rank_in_ch(ctrl, rank, channel))
++ continue;
++
++ /*
++ * The mpr_train_ddr_on bit will force a special command.
++ * Therefore, clear it before issuing the MRS command.
++ */
++ union reut_misc_odt_ctrl_reg reut_misc_odt_ctrl = {
++ .raw = mchbar_read32(REUT_ch_MISC_ODT_CTRL(channel)),
++ };
++ reut_misc_odt_ctrl.mpr_train_ddr_on = 0;
++ mchbar_write32(REUT_ch_MISC_ODT_CTRL(channel), reut_misc_odt_ctrl.raw);
++ if (!ctrl->lpddr)
++ reut_issue_mrs(ctrl, channel, BIT(rank), 3, 0 << 2);
++ }
++}
++
++enum raminit_status train_read_mpr(struct sysinfo *ctrl)
++{
++ set_rxdqs_edges_to_midpoint(ctrl);
++ clear_data_offset_train_all(ctrl);
++ setup_io_test_mpr(ctrl, ctrl->chanmap, LOOPCOUNT_INFINITE, NSOE);
++ enum raminit_status status = RAMINIT_STATUS_SUCCESS;
++ for (uint8_t rank = 0; rank < NUM_SLOTRANKS; rank++) {
++ if (!does_rank_exist(ctrl, rank))
++ continue;
++
++ printk(BIOS_DEBUG, "Rank %u\n", rank);
++ printk(RMPR_PLOT, "Channel");
++ for (uint8_t channel = 0; channel < NUM_CHANNELS; channel++) {
++ if (!rank_in_ch(ctrl, rank, channel))
++ continue;
++
++ printk(RMPR_PLOT, "\t%u\t\t", channel);
++ }
++ printk(RMPR_PLOT, "\nByte");
++ for (uint8_t channel = 0; channel < NUM_CHANNELS; channel++) {
++ if (!rank_in_ch(ctrl, rank, channel))
++ continue;
++
++ printk(RMPR_PLOT, "\t");
++ for (uint8_t byte = 0; byte < ctrl->lanes; byte++)
++ printk(RMPR_PLOT, "%u ", byte);
++ }
++ enter_mpr_train_ddr_mode(ctrl, rank);
++ struct linear_train_data region_data[NUM_CHANNELS][NUM_LANES] = { 0 };
++ for (uint8_t channel = 0; channel < NUM_CHANNELS; channel++)
++ select_reut_ranks(ctrl, channel, BIT(rank));
++
++ printk(RMPR_PLOT, "\nDqsDelay\n");
++ int8_t dqs_delay;
++ for (dqs_delay = RMPR_START; dqs_delay < RMPR_STOP; dqs_delay += RMPR_STEP) {
++ printk(RMPR_PLOT, "% 5d", dqs_delay);
++ const enum regfile_mode regfile = REG_FILE_USE_START;
++ /* Looks like MRC uses rank 0 here, but it feels wrong */
++ change_1d_margin_multicast(ctrl, RdT, dqs_delay, rank, false, regfile);
++ 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++) {
++ 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 = 1;
++ data_control_2.leaker_comp = 0;
++ mchbar_write32(DQ_CONTROL_2(channel, byte),
++ data_control_2.raw);
++ }
++ union ddr_data_control_0_reg data_control_0 = {
++ .raw = ctrl->dq_control_0[channel],
++ };
++ data_control_0.rx_training_mode = 1;
++ data_control_0.force_odt_on = !ctrl->lpddr;
++ data_control_0.en_read_preamble = 0;
++ data_control_0.odt_samp_extend_en = ctrl->lpddr;
++ const uint32_t reg_offset = DDR_DATA_ch_CONTROL_0(channel);
++ mchbar_write32(reg_offset, data_control_0.raw);
++ }
++ run_mpr_io_test(false);
++ for (uint8_t channel = 0; channel < NUM_CHANNELS; channel++) {
++ if (!rank_in_ch(ctrl, rank, channel))
++ continue;
++
++ printk(RMPR_PLOT, "\t");
++ for (uint8_t byte = 0; byte < ctrl->lanes; byte++) {
++ uint32_t fb = get_data_train_feedback(channel, byte);
++ const bool pass = fb == 1;
++ printk(RMPR_PLOT, pass ? ". " : "# ");
++ linear_record_pass(
++ &region_data[channel][byte],
++ pass,
++ dqs_delay,
++ RMPR_START,
++ RMPR_STEP);
++ }
++ }
++ printk(RMPR_PLOT, "\n");
++ for (uint8_t channel = 0; channel < NUM_CHANNELS; channel++) {
++ if (!rank_in_ch(ctrl, rank, channel))
++ continue;
++
++ clear_rx_training_mode(ctrl, channel);
++ }
++ io_reset();
++ }
++ printk(RMPR_PLOT, "\n");
++ leave_mpr_train_ddr_mode(ctrl, rank);
++ clear_data_offset_train_all(ctrl);
++ for (uint8_t channel = 0; channel < NUM_CHANNELS; channel++) {
++ if (!rank_in_ch(ctrl, rank, channel))
++ continue;
++
++ printk(BIOS_DEBUG, "C%u.R%u: \tLeft\tRight\tWidth\tCenter\tRxDqsPN\n",
++ channel, rank);
++ for (uint8_t byte = 0; byte < ctrl->lanes; byte++) {
++ struct linear_train_data *data = &region_data[channel][byte];
++ const int32_t lwidth = range_width(data->largest);
++ if (lwidth <= RMPR_MIN_WIDTH) {
++ printk(BIOS_ERR,
++ "Bad eye (lwidth %d <= min %d) for byte %u\n",
++ lwidth, RMPR_MIN_WIDTH, byte);
++ status = RAMINIT_STATUS_RMPR_FAILURE;
++ }
++ /*
++ * The MPR center may not be ideal on certain platforms for
++ * unknown reasons. If so, adjust it with a magical number.
++ * For Haswell, the magical number is zero. Hell knows why.
++ */
++ const int32_t center = range_center(data->largest);
++ ctrl->rxdqsp[channel][rank][byte] = center - RMPR_START;
++ ctrl->rxdqsn[channel][rank][byte] = center - RMPR_START;
++ printk(BIOS_DEBUG, " B%u: \t%d\t%d\t%d\t%d\t%u\n", byte,
++ data->largest.start, data->largest.end, lwidth,
++ center, ctrl->rxdqsp[channel][rank][byte]);
++ }
++ printk(BIOS_DEBUG, "\n");
++ }
++ }
++
++ /*
++ * Now program the DQS center values on populated ranks. data is taken from
++ * the host struct. We need to do it after all ranks are trained, because we
++ * need to keep the same DQS value on all ranks during the training procedure.
++ */
++ for (uint8_t channel = 0; channel < NUM_CHANNELS; channel++) {
++ if (!does_ch_exist(ctrl, channel))
++ continue;
++
++ for (uint8_t rank = 0; rank < NUM_SLOTRANKS; rank++) {
++ if (!rank_in_ch(ctrl, rank, channel))
++ continue;
++
++ for (uint8_t byte = 0; byte < ctrl->lanes; byte++)
++ update_rxt(ctrl, channel, rank, byte, RXT_RESTORE, 0);
++ }
++ }
++ change_1d_margin_multicast(ctrl, RdT, 0, 0, false, REG_FILE_USE_CURRENT);
++ io_reset();
++ return status;
++}
+diff --git a/src/northbridge/intel/haswell/registers/mchbar.h b/src/northbridge/intel/haswell/registers/mchbar.h
+index 0acafbc826..6a31d3a32c 100644
+--- a/src/northbridge/intel/haswell/registers/mchbar.h
++++ b/src/northbridge/intel/haswell/registers/mchbar.h
+@@ -122,7 +122,7 @@
+ #define REUT_ch_ERR_DATA_MASK(ch) _MCMAIN_C(0x40d8, 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)
+ #define REUT_ch_PAT_CADB_MRS(ch) _MCMAIN_C(0x419c, ch)
+ #define REUT_ch_PAT_CADB_MUX_CTRL(ch) _MCMAIN_C(0x41a0, ch)
+--
+2.39.2
+
generated by cgit v1.2.1 (git 2.18.0) at 2024-05-18 14:00:41 +0000