From da433a5d9a7d1d7856b55761b8392864343de5a8 Mon Sep 17 00:00:00 2001 From: Leah Rowe Date: Tue, 6 Aug 2024 00:50:24 +0100 Subject: [PATCH 17/41] nb/gm45: Fix Angel's DDR2 RCOMP fix on DDR3 boards We add this patch: commit commit_id_here Author: Angel Pons Date: Mon May 10 22:40:59 2021 +0200 nb/intel/gm45: Make DDR2 raminit work This patch was original applied, in lbmk, only on coreboot/dell, separately from coreboot/default, which was wasteful because it meant having an entire coreboot tree just for a single board. We did this, because the DDR2 RCOMP fix happened to break DDR3 init on other boards. What *this* new patch does on top of Angel's patch, is make sure that their changes only apply to DDR2, while DDR3 behaviour remains unchanged. This means that the Dell Latitude E6400 can be supported in the main coreboot tree, within lbmk. Essentially, this patch restores the old behaviour, prior to applying Angel's patch, only when DDR3 memory is used. Signed-off-by: Leah Rowe --- src/northbridge/intel/gm45/raminit.c | 161 +++++++++--------- .../intel/gm45/raminit_rcomp_calibration.c | 9 +- 2 files changed, 88 insertions(+), 82 deletions(-) diff --git a/src/northbridge/intel/gm45/raminit.c b/src/northbridge/intel/gm45/raminit.c index 7b091cc567..478898564a 100644 --- a/src/northbridge/intel/gm45/raminit.c +++ b/src/northbridge/intel/gm45/raminit.c @@ -1117,7 +1117,10 @@ static void dram_program_timings(const int spd_type, const timings_t *const timi reg = (reg & ~(0xf << 10)) | (2 << 10); else reg = (reg & ~(0xf << 10)) | (3 << 10); - reg = (reg & ~(0x7 << 5)) | (2 << 5); + if (spd_type == DDR2) + reg = (reg & ~(0x7 << 5)) | (2 << 5); + else + reg = (reg & ~(0x7 << 5)) | (3 << 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); @@ -2209,83 +2212,85 @@ void raminit(sysinfo_t *const sysinfo, const bool s3resume) 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); + if (sysinfo->spd_type == DDR2) { + /* + * 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); diff --git a/src/northbridge/intel/gm45/raminit_rcomp_calibration.c b/src/northbridge/intel/gm45/raminit_rcomp_calibration.c index b74765fd9c..5d4505e063 100644 --- a/src/northbridge/intel/gm45/raminit_rcomp_calibration.c +++ b/src/northbridge/intel/gm45/raminit_rcomp_calibration.c @@ -198,7 +198,7 @@ void raminit_rcomp_calibration(int ddr_type, const stepping_t stepping) { 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) { + if ((i == 1) && (ddr_type == DDR2)) { magic_comp[0] = (reg >> 8) & 0x3f; magic_comp[1] = (reg >> 0) & 0x3f; } @@ -242,7 +242,8 @@ void raminit_rcomp_calibration(int ddr_type, const stepping_t stepping) { } mchbar += 0x0040; } - - mchbar_clrsetbits32(0x4d0, 0x3f << 26, magic_comp[0] << 26); - mchbar_clrsetbits32(0x4d0, 0x3f << 20, magic_comp[1] << 20); + if (ddr_type == DDR2) { + mchbar_clrsetbits32(0x4d0, 0x3f << 26, magic_comp[0] << 26); + mchbar_clrsetbits32(0x4d0, 0x3f << 20, magic_comp[1] << 20); + } } -- 2.47.3