Timothy Pearson (tpearson@raptorengineeringinc.com) just uploaded a new patch set to gerrit, which you can find at https://review.coreboot.org/14500
-gerrit
commit c132949afc35ea9d32fb256b8885baaa72574e06 Author: Timothy Pearson tpearson@raptorengineeringinc.com Date: Sun Apr 24 20:22:28 2016 -0500
nb/amd/mct_ddr3: Fix a number of minor errors in RDIMM setup
The existing RDIMM RC control word send routines were a hodgepodge of various AGESA chunks with different ways of handling the same task. Unify the control word chip select setup, use precise timing routines on Family 15h, fix a couple of incorrect masks, and add additional debugging statements.
It is believed that this patch is cosmetic and does not significantly alter existing functionality.
Change-Id: Ie4ec7b6a7be7fce09e89f9eec146cc98b15b6160 Signed-off-by: Timothy Pearson tpearson@raptorengineeringinc.com --- src/northbridge/amd/amdmct/mct_ddr3/mctrci.c | 89 ++++++++++++++++++++++------ 1 file changed, 72 insertions(+), 17 deletions(-)
diff --git a/src/northbridge/amd/amdmct/mct_ddr3/mctrci.c b/src/northbridge/amd/amdmct/mct_ddr3/mctrci.c index f5d488a..951a712 100644 --- a/src/northbridge/amd/amdmct/mct_ddr3/mctrci.c +++ b/src/northbridge/amd/amdmct/mct_ddr3/mctrci.c @@ -2,7 +2,7 @@ * This file is part of the coreboot project. * * Copyright (C) 2010 Advanced Micro Devices, Inc. - * Copyright (C) 2015 Timothy Pearson tpearson@raptorengineeringinc.com, Raptor Engineering + * Copyright (C) 2015 - 2016 Raptor Engineering, LLC * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by @@ -128,6 +128,7 @@ static uint8_t fam15h_rdimm_rc2_ibt_code(struct DCTStatStruc *pDCTstat, uint8_t */ }
+ printk(BIOS_SPEW, "%s: DCT %d IBT code: %01x\n", __func__, dct, control_code); return control_code; }
@@ -184,7 +185,7 @@ static u32 mct_ControlRC(struct MCTStatStruc *pMCTstat, uint8_t package_type = mctGet_NVbits(NV_PACK_TYPE); uint8_t MaxDimmsInstallable = mctGet_NVbits(NV_MAX_DIMMS_PER_CH);
- DimmNum = (MrsChipSel >> rc_word_chip_select_lower_bit()) & 0xfe; + DimmNum = (MrsChipSel >> rc_word_chip_select_lower_bit()) & 0x7;
if (dct == 1) DimmNum++; @@ -225,6 +226,10 @@ static u32 mct_ControlRC(struct MCTStatStruc *pMCTstat, val = (pDCTstat->CtrlWrd4 >> (DimmNum << 2)) & 0xff; } else if (CtrlWordNum == 5) { val = (pDCTstat->CtrlWrd5 >> (DimmNum << 2)) & 0xff; + } else if (CtrlWordNum == 6) { + val = ((pDCTstat->spd_data.spd_bytes[DimmNum][72] & 0xf) >> (DimmNum << 2)) & 0xff; + } else if (CtrlWordNum == 7) { + val = (((pDCTstat->spd_data.spd_bytes[DimmNum][72] >> 4) & 0xf) >> (DimmNum << 2)) & 0xff; } else if (CtrlWordNum == 8) { if (is_fam15h()) { val = (fam15h_rdimm_rc2_ibt_code(pDCTstat, dct) & 0xe) >> 1; @@ -253,12 +258,18 @@ static u32 mct_ControlRC(struct MCTStatStruc *pMCTstat, val = 0x1; /* 1.35V */ else val = 0x0; /* 1.5V */ - } else if (CtrlWordNum >= 12) { - val = 0x0; /* Unset */ + } else if (CtrlWordNum == 12) { + val = ((pDCTstat->spd_data.spd_bytes[DimmNum][75] & 0xf) >> (DimmNum << 2)) & 0xff; + } else if (CtrlWordNum == 13) { + val = (((pDCTstat->spd_data.spd_bytes[DimmNum][75] >> 4) & 0xf) >> (DimmNum << 2)) & 0xff; + } else if (CtrlWordNum == 14) { + val = ((pDCTstat->spd_data.spd_bytes[DimmNum][76] & 0xf) >> (DimmNum << 2)) & 0xff; + } else if (CtrlWordNum == 15) { + val = (((pDCTstat->spd_data.spd_bytes[DimmNum][76] >> 4) & 0xf) >> (DimmNum << 2)) & 0xff; } val &= 0xf;
- printk(BIOS_SPEW, "Preparing to send DCT %d DIMM RC%d: %02x\n", dct, CtrlWordNum, val); + printk(BIOS_SPEW, "%s: Preparing to send DCT %d DIMM %d RC%d: %02x\n", __func__, dct, DimmNum >> 1, CtrlWordNum, val);
val = MrsChipSel | rc_word_value_to_ctl_bits(val); val |= rc_word_address_to_ctl_bits(CtrlWordNum); @@ -287,9 +298,12 @@ void mct_DramControlReg_Init_D(struct MCTStatStruc *pMCTstat, u32 dev = pDCTstat->dev_dct; u32 val, cw;
- mct_Wait(1600); + printk(BIOS_SPEW, "%s: Start\n", __func__);
- mct_Wait(1200); + if (!is_fam15h()) { + mct_Wait(1600); + mct_Wait(1200); + }
pDCTstat->CSPresent = pDCTstat->CSPresent_DCT[dct]; if (pDCTstat->GangedMode & 1) @@ -304,21 +318,33 @@ void mct_DramControlReg_Init_D(struct MCTStatStruc *pMCTstat, case 0: case 1: val |= 3 << 8; + break; case 2: case 3: val |= (3 << 2) << 8; + break; case 4: case 5: val |= (3 << 4) << 8; + break; case 6: case 7: val |= (3 << 6) << 8; + break; } Set_NB32_DCT(dev, dct, 0xa8, val); + printk(BIOS_SPEW, "%s: F2xA8: %08x\n", __func__, val);
- for (cw=0; cw <=15; cw ++) { - mct_Wait(1600); - if (!(cw==6 || cw==7)) { + if (is_fam15h()) { + for (cw=0; cw <=15; cw ++) { + val = mct_ControlRC(pMCTstat, pDCTstat, dct, MrsChipSel << rc_word_chip_select_lower_bit(), cw); + mct_SendCtrlWrd(pMCTstat, pDCTstat, dct, val); + if ((cw == 2) || (cw == 8) || (cw == 10)) + precise_ndelay_fam15(pMCTstat, 6000); + } + } else { + for (cw=0; cw <=15; cw ++) { + mct_Wait(1600); val = mct_ControlRC(pMCTstat, pDCTstat, dct, MrsChipSel << rc_word_chip_select_lower_bit(), cw); mct_SendCtrlWrd(pMCTstat, pDCTstat, dct, val); } @@ -327,6 +353,8 @@ void mct_DramControlReg_Init_D(struct MCTStatStruc *pMCTstat, }
mct_Wait(1200); + + printk(BIOS_SPEW, "%s: Done\n", __func__); }
void FreqChgCtrlWrd(struct MCTStatStruc *pMCTstat, @@ -344,12 +372,30 @@ void FreqChgCtrlWrd(struct MCTStatStruc *pMCTstat,
pDCTstat->DIMMAutoSpeed = pDCTstat->TargetFreq; mem_freq = memclk_to_freq(pDCTstat->TargetFreq); - for (MrsChipSel=0; MrsChipSel < 8; MrsChipSel++, MrsChipSel++) { + for (MrsChipSel = 0; MrsChipSel < 8; MrsChipSel += 2) { if (pDCTstat->CSPresent & (1 << MrsChipSel)) { /* 2. Program F2x[1, 0]A8[CtrlWordCS]=bit mask for target chip selects. */ val = Get_NB32_DCT(dev, dct, 0xa8); val &= ~(0xff << 8); - val |= (0x3 << (MrsChipSel & ~0x1)) << 8; + + switch (MrsChipSel) { + case 0: + case 1: + val |= 3 << 8; + break; + case 2: + case 3: + val |= (3 << 2) << 8; + break; + case 4: + case 5: + val |= (3 << 4) << 8; + break; + case 6: + case 7: + val |= (3 << 6) << 8; + break; + } Set_NB32_DCT(dev, dct, 0xa8, val);
/* Resend control word 10 */ @@ -374,23 +420,32 @@ void FreqChgCtrlWrd(struct MCTStatStruc *pMCTstat, break; }
- printk(BIOS_SPEW, "Preparing to send DCT %d DIMM RC%d: %02x\n", dct, 10, freq_ctl_val); + printk(BIOS_SPEW, "Preparing to send DCT %d DIMM %d RC%d: %02x (F2xA8: %08x)\n", dct, MrsChipSel >> 1, 10, freq_ctl_val, val);
- mct_SendCtrlWrd(pMCTstat, pDCTstat, dct, MrsChipSel << rc_word_chip_select_lower_bit() | rc_word_address_to_ctl_bits(10) | rc_word_value_to_ctl_bits(freq_ctl_val)); + mct_SendCtrlWrd(pMCTstat, pDCTstat, dct, (MrsChipSel << rc_word_chip_select_lower_bit()) | rc_word_address_to_ctl_bits(10) | rc_word_value_to_ctl_bits(freq_ctl_val));
- mct_Wait(1600); + if (is_fam15h()) + precise_ndelay_fam15(pMCTstat, 6000); + else + mct_Wait(1600);
/* Resend control word 2 */ val = mct_ControlRC(pMCTstat, pDCTstat, dct, MrsChipSel << rc_word_chip_select_lower_bit(), 2); mct_SendCtrlWrd(pMCTstat, pDCTstat, dct, val);
- mct_Wait(1600); + if (is_fam15h()) + precise_ndelay_fam15(pMCTstat, 6000); + else + mct_Wait(1600);
/* Resend control word 8 */ val = mct_ControlRC(pMCTstat, pDCTstat, dct, MrsChipSel << rc_word_chip_select_lower_bit(), 8); mct_SendCtrlWrd(pMCTstat, pDCTstat, dct, val);
- mct_Wait(1600); + if (is_fam15h()) + precise_ndelay_fam15(pMCTstat, 6000); + else + mct_Wait(1600); } } pDCTstat->DIMMAutoSpeed = SaveSpeed;