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From e047dc3c95063f27517cd6754e9cbe496ac9313d Mon Sep 17 00:00:00 2001
From: Angel Pons <th3fanbus@gmail.com>
Date: Mon, 10 May 2021 22:40:59 +0200
Subject: [PATCH] [NOT FOR MERGE] nb/intel/gm45: Make DDR2 raminit work
List of changes:
- Update some timing and ODT values
- Patch RCOMP calibration to better match what MRC binaries do
- Replay a hardcoded list of RCOMP codes after RcvEn
This makes raminit work at DDR2-800 speeds and fixes S3 resume as well.
Tested on Toshiba Satellite A300-1ME with two 2 GiB DDR2-800 SO-DIMMs.
Change-Id: Ibaee524b8ff652ddadd66cb0eb680401b988ff7c
Signed-off-by: Angel Pons <th3fanbus@gmail.com>
---
diff --git a/src/northbridge/intel/gm45/gm45.h b/src/northbridge/intel/gm45/gm45.h
index f28c6d1..bdf0432 100644
--- a/src/northbridge/intel/gm45/gm45.h
+++ b/src/northbridge/intel/gm45/gm45.h
@@ -419,7 +419,7 @@
int raminit_read_vco_index(void);
u32 raminit_get_rank_addr(unsigned int channel, unsigned int rank);
-void raminit_rcomp_calibration(stepping_t stepping);
+void raminit_rcomp_calibration(int ddr_type, stepping_t stepping);
void raminit_reset_readwrite_pointers(void);
void raminit_receive_enable_calibration(int ddr_type, const timings_t *, const dimminfo_t *);
void raminit_write_training(const mem_clock_t, const dimminfo_t *, int s3resume);
diff --git a/src/northbridge/intel/gm45/raminit.c b/src/northbridge/intel/gm45/raminit.c
index ecada7b..2b8c44e 100644
--- a/src/northbridge/intel/gm45/raminit.c
+++ b/src/northbridge/intel/gm45/raminit.c
@@ -1049,7 +1049,7 @@
}
/* Perform RCOMP calibration for DDR3. */
- raminit_rcomp_calibration(stepping);
+ raminit_rcomp_calibration(spd_type, stepping);
/* Run initial RCOMP. */
mchbar_setbits32(0x418, 1 << 17);
@@ -1119,7 +1119,7 @@
reg = (reg & ~(0xf << 10)) | (2 << 10);
else
reg = (reg & ~(0xf << 10)) | (3 << 10);
- reg = (reg & ~(0x7 << 5)) | (3 << 5);
+ reg = (reg & ~(0x7 << 5)) | (2 << 5);
} else if (timings->mem_clock != MEM_CLOCK_1067MT) {
reg = (reg & ~(0x7 << 15)) | ((9 - timings->CAS) << 15);
reg = (reg & ~(0xf << 10)) | ((timings->CAS - 3) << 10);
@@ -1288,11 +1288,11 @@
reg = (reg & ~(0xf << (44 - 32))) | (8 << (44 - 32));
reg = (reg & ~(0xf << (40 - 32))) | (7 << (40 - 32));
if (timings->mem_clock == MEM_CLOCK_667MT) {
- reg = (reg & ~(0xf << (36 - 32))) | (4 << (36 - 32));
- reg = (reg & ~(0xf << (32 - 32))) | (4 << (32 - 32));
+ reg = (reg & ~(0xf << (36 - 32))) | (8 << (36 - 32));
+ reg = (reg & ~(0xf << (32 - 32))) | (8 << (32 - 32));
} else {
- reg = (reg & ~(0xf << (36 - 32))) | (5 << (36 - 32));
- reg = (reg & ~(0xf << (32 - 32))) | (5 << (32 - 32));
+ reg = (reg & ~(0xf << (36 - 32))) | (9 << (36 - 32));
+ reg = (reg & ~(0xf << (32 - 32))) | (9 << (32 - 32));
}
mchbar_write32(CxODT_HIGH(ch), reg);
@@ -2217,6 +2217,84 @@
raminit_write_training(timings->mem_clock, dimms, s3resume);
}
+ /*
+ * Program hardcoded DDR2-800 RCOMP SRAM codes. This must be done
+ * after receiver enable calibration, otherwise raminit sometimes
+ * completes with non-working memory.
+ */
+ mchbar_write32(0x0530, 0x06060005);
+ mchbar_write32(0x0680, 0x06060606);
+ mchbar_write32(0x0684, 0x08070606);
+ mchbar_write32(0x0688, 0x0e0e0c0a);
+ mchbar_write32(0x068c, 0x0e0e0e0e);
+ mchbar_write32(0x0698, 0x06060606);
+ mchbar_write32(0x069c, 0x08070606);
+ mchbar_write32(0x06a0, 0x0c0c0b0a);
+ mchbar_write32(0x06a4, 0x0c0c0c0c);
+
+ mchbar_write32(0x06c0, 0x02020202);
+ mchbar_write32(0x06c4, 0x03020202);
+ mchbar_write32(0x06c8, 0x04040403);
+ mchbar_write32(0x06cc, 0x04040404);
+ mchbar_write32(0x06d8, 0x02020202);
+ mchbar_write32(0x06dc, 0x03020202);
+ mchbar_write32(0x06e0, 0x04040403);
+ mchbar_write32(0x06e4, 0x04040404);
+
+ mchbar_write32(0x0700, 0x02020202);
+ mchbar_write32(0x0704, 0x03020202);
+ mchbar_write32(0x0708, 0x04040403);
+ mchbar_write32(0x070c, 0x04040404);
+ mchbar_write32(0x0718, 0x02020202);
+ mchbar_write32(0x071c, 0x03020202);
+ mchbar_write32(0x0720, 0x04040403);
+ mchbar_write32(0x0724, 0x04040404);
+
+ mchbar_write32(0x0740, 0x02020202);
+ mchbar_write32(0x0744, 0x03020202);
+ mchbar_write32(0x0748, 0x04040403);
+ mchbar_write32(0x074c, 0x04040404);
+ mchbar_write32(0x0758, 0x02020202);
+ mchbar_write32(0x075c, 0x03020202);
+ mchbar_write32(0x0760, 0x04040403);
+ mchbar_write32(0x0764, 0x04040404);
+
+ mchbar_write32(0x0780, 0x06060606);
+ mchbar_write32(0x0784, 0x09070606);
+ mchbar_write32(0x0788, 0x0e0e0c0b);
+ mchbar_write32(0x078c, 0x0e0e0e0e);
+ mchbar_write32(0x0798, 0x06060606);
+ mchbar_write32(0x079c, 0x09070606);
+ mchbar_write32(0x07a0, 0x0d0d0c0b);
+ mchbar_write32(0x07a4, 0x0d0d0d0d);
+
+ mchbar_write32(0x07c0, 0x06060606);
+ mchbar_write32(0x07c4, 0x09070606);
+ mchbar_write32(0x07c8, 0x0e0e0c0b);
+ mchbar_write32(0x07cc, 0x0e0e0e0e);
+ mchbar_write32(0x07d8, 0x06060606);
+ mchbar_write32(0x07dc, 0x09070606);
+ mchbar_write32(0x07e0, 0x0d0d0c0b);
+ mchbar_write32(0x07e4, 0x0d0d0d0d);
+
+ mchbar_write32(0x0840, 0x06060606);
+ mchbar_write32(0x0844, 0x08070606);
+ mchbar_write32(0x0848, 0x0e0e0c0a);
+ mchbar_write32(0x084c, 0x0e0e0e0e);
+ mchbar_write32(0x0858, 0x06060606);
+ mchbar_write32(0x085c, 0x08070606);
+ mchbar_write32(0x0860, 0x0c0c0b0a);
+ mchbar_write32(0x0864, 0x0c0c0c0c);
+
+ mchbar_write32(0x0880, 0x02020202);
+ mchbar_write32(0x0884, 0x03020202);
+ mchbar_write32(0x0888, 0x04040403);
+ mchbar_write32(0x088c, 0x04040404);
+ mchbar_write32(0x0898, 0x02020202);
+ mchbar_write32(0x089c, 0x03020202);
+ mchbar_write32(0x08a0, 0x04040403);
+ mchbar_write32(0x08a4, 0x04040404);
+
igd_compute_ggc(sysinfo);
/* Program final memory map (with real values). */
diff --git a/src/northbridge/intel/gm45/raminit_rcomp_calibration.c b/src/northbridge/intel/gm45/raminit_rcomp_calibration.c
index aef863f..b74765f 100644
--- a/src/northbridge/intel/gm45/raminit_rcomp_calibration.c
+++ b/src/northbridge/intel/gm45/raminit_rcomp_calibration.c
@@ -161,11 +161,13 @@
mchbar += 4;
}
}
-void raminit_rcomp_calibration(const stepping_t stepping) {
+void raminit_rcomp_calibration(int ddr_type, const stepping_t stepping) {
const int a1step = stepping >= STEPPING_CONVERSION_A1;
int i;
+ char magic_comp[2] = {0};
+
enum {
PULL_UP = 0,
PULL_DOWN = 1,
@@ -196,6 +198,10 @@
reg = mchbar_read32(0x518);
lut_idx[channel][group][PULL_UP] = (reg >> 24) & 0x7f;
lut_idx[channel][group][PULL_DOWN] = (reg >> 16) & 0x7f;
+ if (i == 1) {
+ magic_comp[0] = (reg >> 8) & 0x3f;
+ magic_comp[1] = (reg >> 0) & 0x3f;
+ }
}
/* Cleanup? */
mchbar_setbits32(0x400, 1 << 3);
@@ -216,13 +222,19 @@
for (channel = 0; channel < 2; ++channel) {
for (group = 0; group < 6; ++group) {
for (pu_pd = PULL_DOWN; pu_pd >= PULL_UP; --pu_pd) {
- lookup_and_write(
- a1step,
- lut_idx[channel][group][pu_pd] - 7,
- ddr3_lookup_schedule[group][pu_pd],
- mchbar);
+ if (ddr_type == DDR3) {
+ lookup_and_write(
+ a1step,
+ lut_idx[channel][group][pu_pd] - 7,
+ ddr3_lookup_schedule[group][pu_pd],
+ mchbar);
+ }
mchbar += 0x0018;
}
+ if (ddr_type == DDR2) {
+ mchbar_clrsetbits32(mchbar + 0, 0x7f << 24, lut_idx[channel][group][PULL_DOWN] << 24);
+ mchbar_clrsetbits32(mchbar + 4, 0x7f << 0, lut_idx[channel][group][PULL_UP] << 0);
+ }
mchbar += 0x0010;
/* Channel B knows only the first two groups. */
if ((1 == channel) && (1 == group))
@@ -230,4 +242,7 @@
}
mchbar += 0x0040;
}
+
+ mchbar_clrsetbits32(0x4d0, 0x3f << 26, magic_comp[0] << 26);
+ mchbar_clrsetbits32(0x4d0, 0x3f << 20, magic_comp[1] << 20);
}
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