/* * This file is part of the coreboot project. * * Copyright (C) 2014 Damien Zammit * Copyright (C) 2014 Vladimir Serbinenko * Copyright (C) 2016 Patrick Rudolph * * 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 * the Free Software Foundation; version 2 of the License. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. */ #include #include #include #include #include #include #include #include #include #include #include #include #include "raminit_native.h" #include "raminit_common.h" #include "sandybridge.h" /* FIXME: no ECC support. */ /* FIXME: no support for 3-channel chipsets. */ /* * Register description: * Intel provides a command queue of depth four. * Every command is configured by using multiple registers. * On executing the command queue you have to provide the depth used. * * Known registers: * Channel X = [0, 1] * Command queue index Y = [0, 1, 2, 3] * * DEFAULT_MCHBAR + 0x4220 + 0x400 * X + 4 * Y: command io register * Controls the DRAM command signals * Bit 0: !RAS * Bit 1: !CAS * Bit 2: !WE * * DEFAULT_MCHBAR + 0x4200 + 0x400 * X + 4 * Y: addr bankslot io register * Controls the address, bank address and slotrank signals * Bit 0-15 : Address * Bit 20-22: Bank Address * Bit 24-25: slotrank * * DEFAULT_MCHBAR + 0x4230 + 0x400 * X + 4 * Y: idle register * Controls the idle time after issuing this DRAM command * Bit 16-32: number of clock-cylces to idle * * DEFAULT_MCHBAR + 0x4284 + 0x400 * channel: execute command queue * Starts to execute all queued commands * Bit 0 : start DRAM command execution * Bit 16-20: (number of queued commands - 1) * 4 */ static void sfence(void) { asm volatile ("sfence"); } static void toggle_io_reset(void) { /* toggle IO reset bit */ u32 r32 = read32(DEFAULT_MCHBAR + 0x5030); write32(DEFAULT_MCHBAR + 0x5030, r32 | 0x20); udelay(1); write32(DEFAULT_MCHBAR + 0x5030, r32 & ~0x20); udelay(1); } static u32 get_XOVER_CLK(u8 rankmap) { return rankmap << 24; } static u32 get_XOVER_CMD(u8 rankmap) { u32 reg; // enable xover cmd reg = 0x4000; // enable xover ctl if (rankmap & 0x3) reg |= 0x20000; if (rankmap & 0xc) reg |= 0x4000000; return reg; } /* CAS write latency. To be programmed in MR2. * See DDR3 SPEC for MR2 documentation. */ u8 get_CWL(u32 tCK) { /* Get CWL based on tCK using the following rule: */ switch (tCK) { case TCK_1333MHZ: return 12; case TCK_1200MHZ: case TCK_1100MHZ: return 11; case TCK_1066MHZ: case TCK_1000MHZ: return 10; case TCK_933MHZ: case TCK_900MHZ: return 9; case TCK_800MHZ: case TCK_700MHZ: return 8; case TCK_666MHZ: return 7; case TCK_533MHZ: return 6; default: return 5; } } void dram_find_common_params(ramctr_timing *ctrl) { size_t valid_dimms; int channel, slot; dimm_info *dimms = &ctrl->info; ctrl->cas_supported = (1 << (MAX_CAS - MIN_CAS + 1)) - 1; valid_dimms = 0; FOR_ALL_CHANNELS for (slot = 0; slot < 2; slot++) { const dimm_attr *dimm = &dimms->dimm[channel][slot]; if (dimm->dram_type != SPD_MEMORY_TYPE_SDRAM_DDR3) continue; valid_dimms++; /* Find all possible CAS combinations */ ctrl->cas_supported &= dimm->cas_supported; /* Find the smallest common latencies supported by all DIMMs */ ctrl->tCK = MAX(ctrl->tCK, dimm->tCK); ctrl->tAA = MAX(ctrl->tAA, dimm->tAA); ctrl->tWR = MAX(ctrl->tWR, dimm->tWR); ctrl->tRCD = MAX(ctrl->tRCD, dimm->tRCD); ctrl->tRRD = MAX(ctrl->tRRD, dimm->tRRD); ctrl->tRP = MAX(ctrl->tRP, dimm->tRP); ctrl->tRAS = MAX(ctrl->tRAS, dimm->tRAS); ctrl->tRFC = MAX(ctrl->tRFC, dimm->tRFC); ctrl->tWTR = MAX(ctrl->tWTR, dimm->tWTR); ctrl->tRTP = MAX(ctrl->tRTP, dimm->tRTP); ctrl->tFAW = MAX(ctrl->tFAW, dimm->tFAW); } if (!ctrl->cas_supported) die("Unsupported DIMM combination. " "DIMMS do not support common CAS latency"); if (!valid_dimms) die("No valid DIMMs found"); } void dram_xover(ramctr_timing * ctrl) { u32 reg; int channel; FOR_ALL_CHANNELS { // enable xover clk reg = get_XOVER_CLK(ctrl->rankmap[channel]); printram("XOVER CLK [%x] = %x\n", channel * 0x100 + 0xc14, reg); MCHBAR32(channel * 0x100 + 0xc14) = reg; // enable xover ctl & xover cmd reg = get_XOVER_CMD(ctrl->rankmap[channel]); printram("XOVER CMD [%x] = %x\n", 0x100 * channel + 0x320c, reg); MCHBAR32(0x100 * channel + 0x320c) = reg; } } static void dram_odt_stretch(ramctr_timing *ctrl, int channel) { struct cpuid_result cpures; u32 reg, addr, cpu, stretch; stretch = ctrl->ref_card_offset[channel]; /* ODT stretch: Delay ODT signal by stretch value. * Useful for multi DIMM setups on the same channel. */ cpures = cpuid(1); cpu = cpures.eax; if (IS_SANDY_CPU(cpu) && IS_SANDY_CPU_C(cpu)) { if (stretch == 2) stretch = 3; addr = 0x400 * channel + 0x401c; reg = MCHBAR32(addr) & 0xffffc3ff; reg |= (stretch << 12); reg |= (stretch << 10); MCHBAR32(addr) = reg; printram("OTHP Workaround [%x] = %x\n", addr, reg); } else { // OTHP addr = 0x400 * channel + 0x400c; reg = MCHBAR32(addr) & 0xfff0ffff; reg |= (stretch << 16); reg |= (stretch << 18); MCHBAR32(addr) = reg; printram("OTHP [%x] = %x\n", addr, reg); } } void dram_timing_regs(ramctr_timing *ctrl) { u32 reg, addr, val32; int channel; FOR_ALL_CHANNELS { // DBP reg = 0; reg |= ctrl->tRCD; reg |= (ctrl->tRP << 4); reg |= (ctrl->CAS << 8); reg |= (ctrl->CWL << 12); reg |= (ctrl->tRAS << 16); printram("DBP [%x] = %x\n", 0x400 * channel + 0x4000, reg); MCHBAR32(0x400 * channel + 0x4000) = reg; // RAP reg = 0; reg |= ctrl->tRRD; reg |= (ctrl->tRTP << 4); reg |= (ctrl->tCKE << 8); reg |= (ctrl->tWTR << 12); reg |= (ctrl->tFAW << 16); reg |= (ctrl->tWR << 24); reg |= (3 << 30); printram("RAP [%x] = %x\n", 0x400 * channel + 0x4004, reg); MCHBAR32(0x400 * channel + 0x4004) = reg; // OTHP addr = 0x400 * channel + 0x400c; reg = 0; reg |= ctrl->tXPDLL; reg |= (ctrl->tXP << 5); reg |= (ctrl->tAONPD << 8); reg |= 0xa0000; printram("OTHP [%x] = %x\n", addr, reg); MCHBAR32(addr) = reg; MCHBAR32(0x400 * channel + 0x4014) = 0; MCHBAR32(addr) |= 0x00020000; dram_odt_stretch(ctrl, channel); // REFI reg = 0; val32 = ctrl->tREFI; reg = (reg & ~0xffff) | val32; val32 = ctrl->tRFC; reg = (reg & ~0x1ff0000) | (val32 << 16); val32 = (u32) (ctrl->tREFI * 9) / 1024; reg = (reg & ~0xfe000000) | (val32 << 25); printram("REFI [%x] = %x\n", 0x400 * channel + 0x4298, reg); MCHBAR32(0x400 * channel + 0x4298) = reg; MCHBAR32(0x400 * channel + 0x4294) |= 0xff; // SRFTP reg = 0; val32 = tDLLK; reg = (reg & ~0xfff) | val32; val32 = ctrl->tXSOffset; reg = (reg & ~0xf000) | (val32 << 12); val32 = tDLLK - ctrl->tXSOffset; reg = (reg & ~0x3ff0000) | (val32 << 16); val32 = ctrl->tMOD - 8; reg = (reg & ~0xf0000000) | (val32 << 28); printram("SRFTP [%x] = %x\n", 0x400 * channel + 0x42a4, reg); MCHBAR32(0x400 * channel + 0x42a4) = reg; } } void dram_dimm_mapping(ramctr_timing *ctrl) { int channel; dimm_info *info = &ctrl->info; FOR_ALL_CHANNELS { dimm_attr *dimmA, *dimmB; u32 reg = 0; if (info->dimm[channel][0].size_mb >= info->dimm[channel][1].size_mb) { dimmA = &info->dimm[channel][0]; dimmB = &info->dimm[channel][1]; reg |= 0 << 16; } else { dimmA = &info->dimm[channel][1]; dimmB = &info->dimm[channel][0]; reg |= 1 << 16; } if (dimmA && (dimmA->ranks > 0)) { reg |= dimmA->size_mb / 256; reg |= (dimmA->ranks - 1) << 17; reg |= (dimmA->width / 8 - 1) << 19; } if (dimmB && (dimmB->ranks > 0)) { reg |= (dimmB->size_mb / 256) << 8; reg |= (dimmB->ranks - 1) << 18; reg |= (dimmB->width / 8 - 1) << 20; } reg |= 1 << 21; /* rank interleave */ reg |= 1 << 22; /* enhanced interleave */ if ((dimmA && (dimmA->ranks > 0)) || (dimmB && (dimmB->ranks > 0))) { ctrl->mad_dimm[channel] = reg; } else { ctrl->mad_dimm[channel] = 0; } } } void dram_dimm_set_mapping(ramctr_timing * ctrl) { int channel; FOR_ALL_CHANNELS { MCHBAR32(0x5004 + channel * 4) = ctrl->mad_dimm[channel]; } } void dram_zones(ramctr_timing * ctrl, int training) { u32 reg, ch0size, ch1size; u8 val; reg = 0; val = 0; if (training) { ch0size = ctrl->channel_size_mb[0] ? 256 : 0; ch1size = ctrl->channel_size_mb[1] ? 256 : 0; } else { ch0size = ctrl->channel_size_mb[0]; ch1size = ctrl->channel_size_mb[1]; } if (ch0size >= ch1size) { reg = MCHBAR32(0x5014); val = ch1size / 256; reg = (reg & ~0xff000000) | val << 24; reg = (reg & ~0xff0000) | (2 * val) << 16; MCHBAR32(0x5014) = reg; MCHBAR32(0x5000) = 0x24; } else { reg = MCHBAR32(0x5014); val = ch0size / 256; reg = (reg & ~0xff000000) | val << 24; reg = (reg & ~0xff0000) | (2 * val) << 16; MCHBAR32(0x5014) = reg; MCHBAR32(0x5000) = 0x21; } } #define HOST_BRIDGE PCI_DEVFN(0, 0) #define DEFAULT_TCK TCK_800MHZ unsigned int get_mem_min_tck(void) { u32 reg32; u8 rev; const struct device *dev; const struct northbridge_intel_sandybridge_config *cfg = NULL; dev = dev_find_slot(0, HOST_BRIDGE); if (dev) cfg = dev->chip_info; /* If this is zero, it just means devicetree.cb didn't set it */ if (!cfg || cfg->max_mem_clock_mhz == 0) { if (IS_ENABLED(CONFIG_NATIVE_RAMINIT_IGNORE_MAX_MEM_FUSES)) return TCK_1333MHZ; rev = pci_read_config8(PCI_DEV(0, 0, 0), PCI_DEVICE_ID); if ((rev & BASE_REV_MASK) == BASE_REV_SNB) { /* read Capabilities A Register DMFC bits */ reg32 = pci_read_config32(PCI_DEV(0, 0, 0), CAPID0_A); reg32 &= 0x7; switch (reg32) { case 7: return TCK_533MHZ; case 6: return TCK_666MHZ; case 5: return TCK_800MHZ; /* reserved: */ default: break; } } else { /* read Capabilities B Register DMFC bits */ reg32 = pci_read_config32(PCI_DEV(0, 0, 0), CAPID0_B); reg32 = (reg32 >> 4) & 0x7; switch (reg32) { case 7: return TCK_533MHZ; case 6: return TCK_666MHZ; case 5: return TCK_800MHZ; case 4: return TCK_933MHZ; case 3: return TCK_1066MHZ; case 2: return TCK_1200MHZ; case 1: return TCK_1333MHZ; /* reserved: */ default: break; } } return DEFAULT_TCK; } else { if (cfg->max_mem_clock_mhz >= 1066) return TCK_1066MHZ; else if (cfg->max_mem_clock_mhz >= 933) return TCK_933MHZ; else if (cfg->max_mem_clock_mhz >= 800) return TCK_800MHZ; else if (cfg->max_mem_clock_mhz >= 666) return TCK_666MHZ; else if (cfg->max_mem_clock_mhz >= 533) return TCK_533MHZ; else return TCK_400MHZ; } } #define DEFAULT_PCI_MMIO_SIZE 2048 static unsigned int get_mmio_size(void) { const struct device *dev; const struct northbridge_intel_sandybridge_config *cfg = NULL; dev = dev_find_slot(0, HOST_BRIDGE); if (dev) cfg = dev->chip_info; /* If this is zero, it just means devicetree.cb didn't set it */ if (!cfg || cfg->pci_mmio_size == 0) return DEFAULT_PCI_MMIO_SIZE; else return cfg->pci_mmio_size; } void dram_memorymap(ramctr_timing * ctrl, int me_uma_size) { u32 reg, val, reclaim; u32 tom, gfxstolen, gttsize; size_t tsegsize, mmiosize, toludbase, touudbase, gfxstolenbase, gttbase, tsegbase, mestolenbase; size_t tsegbasedelta, remapbase, remaplimit; uint16_t ggc; mmiosize = get_mmio_size(); ggc = pci_read_config16(NORTHBRIDGE, GGC); if (!(ggc & 2)) { gfxstolen = ((ggc >> 3) & 0x1f) * 32; gttsize = ((ggc >> 8) & 0x3); } else { gfxstolen = 0; gttsize = 0; } tsegsize = CONFIG_SMM_TSEG_SIZE >> 20; tom = ctrl->channel_size_mb[0] + ctrl->channel_size_mb[1]; mestolenbase = tom - me_uma_size; toludbase = MIN(4096 - mmiosize + gfxstolen + gttsize + tsegsize, tom - me_uma_size); gfxstolenbase = toludbase - gfxstolen; gttbase = gfxstolenbase - gttsize; tsegbase = gttbase - tsegsize; // Round tsegbase down to nearest address aligned to tsegsize tsegbasedelta = tsegbase & (tsegsize - 1); tsegbase &= ~(tsegsize - 1); gttbase -= tsegbasedelta; gfxstolenbase -= tsegbasedelta; toludbase -= tsegbasedelta; // Test if it is possible to reclaim a hole in the RAM addressing if (tom - me_uma_size > toludbase) { // Reclaim is possible reclaim = 1; remapbase = MAX(4096, tom - me_uma_size); remaplimit = remapbase + MIN(4096, tom - me_uma_size) - toludbase - 1; touudbase = remaplimit + 1; } else { // Reclaim not possible reclaim = 0; touudbase = tom - me_uma_size; } // Update memory map in pci-e configuration space printk(BIOS_DEBUG, "Update PCI-E configuration space:\n"); // TOM (top of memory) reg = pci_read_config32(PCI_DEV(0, 0, 0), 0xa0); val = tom & 0xfff; reg = (reg & ~0xfff00000) | (val << 20); printk(BIOS_DEBUG, "PCI(0, 0, 0)[%x] = %x\n", 0xa0, reg); pci_write_config32(PCI_DEV(0, 0, 0), 0xa0, reg); reg = pci_read_config32(PCI_DEV(0, 0, 0), 0xa4); val = tom & 0xfffff000; reg = (reg & ~0x000fffff) | (val >> 12); printk(BIOS_DEBUG, "PCI(0, 0, 0)[%x] = %x\n", 0xa4, reg); pci_write_config32(PCI_DEV(0, 0, 0), 0xa4, reg); // TOLUD (top of low used dram) reg = pci_read_config32(PCI_DEV(0, 0, 0), 0xbc); val = toludbase & 0xfff; reg = (reg & ~0xfff00000) | (val << 20); printk(BIOS_DEBUG, "PCI(0, 0, 0)[%x] = %x\n", 0xbc, reg); pci_write_config32(PCI_DEV(0, 0, 0), 0xbc, reg); // TOUUD LSB (top of upper usable dram) reg = pci_read_config32(PCI_DEV(0, 0, 0), 0xa8); val = touudbase & 0xfff; reg = (reg & ~0xfff00000) | (val << 20); printk(BIOS_DEBUG, "PCI(0, 0, 0)[%x] = %x\n", 0xa8, reg); pci_write_config32(PCI_DEV(0, 0, 0), 0xa8, reg); // TOUUD MSB reg = pci_read_config32(PCI_DEV(0, 0, 0), 0xac); val = touudbase & 0xfffff000; reg = (reg & ~0x000fffff) | (val >> 12); printk(BIOS_DEBUG, "PCI(0, 0, 0)[%x] = %x\n", 0xac, reg); pci_write_config32(PCI_DEV(0, 0, 0), 0xac, reg); if (reclaim) { // REMAP BASE pci_write_config32(PCI_DEV(0, 0, 0), 0x90, remapbase << 20); pci_write_config32(PCI_DEV(0, 0, 0), 0x94, remapbase >> 12); // REMAP LIMIT pci_write_config32(PCI_DEV(0, 0, 0), 0x98, remaplimit << 20); pci_write_config32(PCI_DEV(0, 0, 0), 0x9c, remaplimit >> 12); } // TSEG reg = pci_read_config32(PCI_DEV(0, 0, 0), 0xb8); val = tsegbase & 0xfff; reg = (reg & ~0xfff00000) | (val << 20); printk(BIOS_DEBUG, "PCI(0, 0, 0)[%x] = %x\n", 0xb8, reg); pci_write_config32(PCI_DEV(0, 0, 0), 0xb8, reg); // GFX stolen memory reg = pci_read_config32(PCI_DEV(0, 0, 0), 0xb0); val = gfxstolenbase & 0xfff; reg = (reg & ~0xfff00000) | (val << 20); printk(BIOS_DEBUG, "PCI(0, 0, 0)[%x] = %x\n", 0xb0, reg); pci_write_config32(PCI_DEV(0, 0, 0), 0xb0, reg); // GTT stolen memory reg = pci_read_config32(PCI_DEV(0, 0, 0), 0xb4); val = gttbase & 0xfff; reg = (reg & ~0xfff00000) | (val << 20); printk(BIOS_DEBUG, "PCI(0, 0, 0)[%x] = %x\n", 0xb4, reg); pci_write_config32(PCI_DEV(0, 0, 0), 0xb4, reg); if (me_uma_size) { reg = pci_read_config32(PCI_DEV(0, 0, 0), 0x7c); val = (0x80000 - me_uma_size) & 0xfffff000; reg = (reg & ~0x000fffff) | (val >> 12); printk(BIOS_DEBUG, "PCI(0, 0, 0)[%x] = %x\n", 0x7c, reg); pci_write_config32(PCI_DEV(0, 0, 0), 0x7c, reg); // ME base reg = pci_read_config32(PCI_DEV(0, 0, 0), 0x70); val = mestolenbase & 0xfff; reg = (reg & ~0xfff00000) | (val << 20); printk(BIOS_DEBUG, "PCI(0, 0, 0)[%x] = %x\n", 0x70, reg); pci_write_config32(PCI_DEV(0, 0, 0), 0x70, reg); reg = pci_read_config32(PCI_DEV(0, 0, 0), 0x74); val = mestolenbase & 0xfffff000; reg = (reg & ~0x000fffff) | (val >> 12); printk(BIOS_DEBUG, "PCI(0, 0, 0)[%x] = %x\n", 0x74, reg); pci_write_config32(PCI_DEV(0, 0, 0), 0x74, reg); // ME mask reg = pci_read_config32(PCI_DEV(0, 0, 0), 0x78); val = (0x80000 - me_uma_size) & 0xfff; reg = (reg & ~0xfff00000) | (val << 20); reg = (reg & ~0x400) | (1 << 10); // set lockbit on ME mem reg = (reg & ~0x800) | (1 << 11); // set ME memory enable printk(BIOS_DEBUG, "PCI(0, 0, 0)[%x] = %x\n", 0x78, reg); pci_write_config32(PCI_DEV(0, 0, 0), 0x78, reg); } } static void wait_428c(int channel) { while (1) { if (read32(DEFAULT_MCHBAR + 0x428c + (channel << 10)) & 0x50) return; } } static void write_reset(ramctr_timing * ctrl) { int channel, slotrank; /* choose a populated channel. */ channel = (ctrl->rankmap[0]) ? 0 : 1; wait_428c(channel); /* choose a populated rank. */ slotrank = (ctrl->rankmap[channel] & 1) ? 0 : 2; /* DRAM command ZQCS */ write32(DEFAULT_MCHBAR + 0x4220 + 0x400 * channel, 0x0f003); write32(DEFAULT_MCHBAR + 0x4230 + 0x400 * channel, 0x80c01); write32(DEFAULT_MCHBAR + 0x4200 + 0x400 * channel, (slotrank << 24) | 0x60000); write32(DEFAULT_MCHBAR + 0x4210 + 0x400 * channel, 0); write32(DEFAULT_MCHBAR + 0x4284 + 0x400 * channel, 0x400001); wait_428c(channel); } void dram_jedecreset(ramctr_timing * ctrl) { u32 reg, addr; int channel; while (!(MCHBAR32(0x5084) & 0x10000)); do { reg = MCHBAR32(0x428c); } while ((reg & 0x14) == 0); // Set state of memory controller reg = 0x112; MCHBAR32(0x5030) = reg; MCHBAR32(0x4ea0) = 0; reg |= 2; //ddr reset MCHBAR32(0x5030) = reg; // Assert dimm reset signal reg = MCHBAR32(0x5030); reg &= ~0x2; MCHBAR32(0x5030) = reg; // Wait 200us udelay(200); // Deassert dimm reset signal MCHBAR32(0x5030) |= 2; // Wait 500us udelay(500); // Enable DCLK MCHBAR32(0x5030) |= 4; // XXX Wait 20ns udelay(1); FOR_ALL_CHANNELS { // Set valid rank CKE reg = 0; reg = (reg & ~0xf) | ctrl->rankmap[channel]; addr = 0x400 * channel + 0x42a0; MCHBAR32(addr) = reg; // Wait 10ns for ranks to settle //udelay(0.01); reg = (reg & ~0xf0) | (ctrl->rankmap[channel] << 4); MCHBAR32(addr) = reg; // Write reset using a NOP write_reset(ctrl); } } static odtmap get_ODT(ramctr_timing *ctrl, u8 rank, int channel) { /* Get ODT based on rankmap: */ int dimms_per_ch = (ctrl->rankmap[channel] & 1) + ((ctrl->rankmap[channel] >> 2) & 1); if (dimms_per_ch == 1) { return (const odtmap){60, 60}; } else { return (const odtmap){120, 30}; } } static void write_mrreg(ramctr_timing *ctrl, int channel, int slotrank, int reg, u32 val) { wait_428c(channel); if (ctrl->rank_mirror[channel][slotrank]) { /* DDR3 Rank1 Address mirror * swap the following pins: * A3<->A4, A5<->A6, A7<->A8, BA0<->BA1 */ reg = ((reg >> 1) & 1) | ((reg << 1) & 2); val = (val & ~0x1f8) | ((val >> 1) & 0xa8) | ((val & 0xa8) << 1); } /* DRAM command MRS */ write32(DEFAULT_MCHBAR + 0x4220 + 0x400 * channel, 0x0f000); write32(DEFAULT_MCHBAR + 0x4230 + 0x400 * channel, 0x41001); write32(DEFAULT_MCHBAR + 0x4200 + 0x400 * channel, (slotrank << 24) | (reg << 20) | val | 0x60000); write32(DEFAULT_MCHBAR + 0x4210 + 0x400 * channel, 0); /* DRAM command MRS */ write32(DEFAULT_MCHBAR + 0x4224 + 0x400 * channel, 0x1f000); write32(DEFAULT_MCHBAR + 0x4234 + 0x400 * channel, 0x41001); write32(DEFAULT_MCHBAR + 0x4204 + 0x400 * channel, (slotrank << 24) | (reg << 20) | val | 0x60000); write32(DEFAULT_MCHBAR + 0x4214 + 0x400 * channel, 0); /* DRAM command MRS */ write32(DEFAULT_MCHBAR + 0x4228 + 0x400 * channel, 0x0f000); write32(DEFAULT_MCHBAR + 0x4238 + 0x400 * channel, 0x1001 | (ctrl->tMOD << 16)); write32(DEFAULT_MCHBAR + 0x4208 + 0x400 * channel, (slotrank << 24) | (reg << 20) | val | 0x60000); write32(DEFAULT_MCHBAR + 0x4218 + 0x400 * channel, 0); write32(DEFAULT_MCHBAR + 0x4284 + 0x400 * channel, 0x80001); } static u32 make_mr0(ramctr_timing * ctrl, u8 rank) { u16 mr0reg, mch_cas, mch_wr; static const u8 mch_wr_t[12] = { 1, 2, 3, 4, 0, 5, 0, 6, 0, 7, 0, 0 }; /* DLL Reset - self clearing - set after CLK frequency has been changed */ mr0reg = 0x100; // Convert CAS to MCH register friendly if (ctrl->CAS < 12) { mch_cas = (u16) ((ctrl->CAS - 4) << 1); } else { mch_cas = (u16) (ctrl->CAS - 12); mch_cas = ((mch_cas << 1) | 0x1); } // Convert tWR to MCH register friendly mch_wr = mch_wr_t[ctrl->tWR - 5]; mr0reg = (mr0reg & ~0x4) | ((mch_cas & 0x1) << 2); mr0reg = (mr0reg & ~0x70) | ((mch_cas & 0xe) << 3); mr0reg = (mr0reg & ~0xe00) | (mch_wr << 9); // Precharge PD - Fast (desktop) 0x1 or slow (mobile) 0x0 - mostly power-saving feature mr0reg = (mr0reg & ~0x1000) | (!ctrl->mobile << 12); return mr0reg; } static void dram_mr0(ramctr_timing *ctrl, u8 rank, int channel) { write_mrreg(ctrl, channel, rank, 0, make_mr0(ctrl, rank)); } static u32 encode_odt(u32 odt) { switch (odt) { case 30: return (1 << 9) | (1 << 2); // RZQ/8, RZQ/4 case 60: return (1 << 2); // RZQ/4 case 120: return (1 << 6); // RZQ/2 default: case 0: return 0; } } static u32 make_mr1(ramctr_timing *ctrl, u8 rank, int channel) { odtmap odt; u32 mr1reg; odt = get_ODT(ctrl, rank, channel); mr1reg = 0x2; mr1reg |= encode_odt(odt.rttnom); return mr1reg; } static void dram_mr1(ramctr_timing *ctrl, u8 rank, int channel) { u16 mr1reg; mr1reg = make_mr1(ctrl, rank, channel); write_mrreg(ctrl, channel, rank, 1, mr1reg); } static void dram_mr2(ramctr_timing *ctrl, u8 rank, int channel) { u16 pasr, cwl, mr2reg; odtmap odt; int srt; pasr = 0; cwl = ctrl->CWL - 5; odt = get_ODT(ctrl, rank, channel); srt = ctrl->extended_temperature_range && !ctrl->auto_self_refresh; mr2reg = 0; mr2reg = (mr2reg & ~0x7) | pasr; mr2reg = (mr2reg & ~0x38) | (cwl << 3); mr2reg = (mr2reg & ~0x40) | (ctrl->auto_self_refresh << 6); mr2reg = (mr2reg & ~0x80) | (srt << 7); mr2reg |= (odt.rttwr / 60) << 9; write_mrreg(ctrl, channel, rank, 2, mr2reg); } static void dram_mr3(ramctr_timing *ctrl, u8 rank, int channel) { write_mrreg(ctrl, channel, rank, 3, 0); } void dram_mrscommands(ramctr_timing * ctrl) { u8 slotrank; u32 reg, addr; int channel; FOR_ALL_POPULATED_CHANNELS { FOR_ALL_POPULATED_RANKS { // MR2 dram_mr2(ctrl, slotrank, channel); // MR3 dram_mr3(ctrl, slotrank, channel); // MR1 dram_mr1(ctrl, slotrank, channel); // MR0 dram_mr0(ctrl, slotrank, channel); } } /* DRAM command NOP */ write32(DEFAULT_MCHBAR + 0x4e20, 0x7); write32(DEFAULT_MCHBAR + 0x4e30, 0xf1001); write32(DEFAULT_MCHBAR + 0x4e00, 0x60002); write32(DEFAULT_MCHBAR + 0x4e10, 0); /* DRAM command ZQCL */ write32(DEFAULT_MCHBAR + 0x4e24, 0x1f003); write32(DEFAULT_MCHBAR + 0x4e34, 0x1901001); write32(DEFAULT_MCHBAR + 0x4e04, 0x60400); write32(DEFAULT_MCHBAR + 0x4e14, 0x288); /* execute command queue on all channels ? */ write32(DEFAULT_MCHBAR + 0x4e84, 0x40004); // Drain FOR_ALL_CHANNELS { // Wait for ref drained wait_428c(channel); } // Refresh enable MCHBAR32(0x5030) |= 8; FOR_ALL_POPULATED_CHANNELS { addr = 0x400 * channel + 0x4020; reg = MCHBAR32(addr); reg &= ~0x200000; MCHBAR32(addr) = reg; wait_428c(channel); slotrank = (ctrl->rankmap[channel] & 1) ? 0 : 2; // Drain wait_428c(channel); /* DRAM command ZQCS */ write32(DEFAULT_MCHBAR + 0x4220 + 0x400 * channel, 0x0f003); write32(DEFAULT_MCHBAR + 0x4230 + 0x400 * channel, 0x659001); write32(DEFAULT_MCHBAR + 0x4200 + 0x400 * channel, (slotrank << 24) | 0x60000); write32(DEFAULT_MCHBAR + 0x4210 + 0x400 * channel, 0x3e0); write32(DEFAULT_MCHBAR + 0x4284 + 0x400 * channel, 0x1); // Drain wait_428c(channel); } } static const u32 lane_registers[] = { 0x0000, 0x0200, 0x0400, 0x0600, 0x1000, 0x1200, 0x1400, 0x1600, 0x0800 }; void program_timings(ramctr_timing * ctrl, int channel) { u32 reg32, reg_4024, reg_c14, reg_c18, reg_4028; int lane; int slotrank, slot; int full_shift = 0; u16 slot320c[NUM_SLOTS]; FOR_ALL_POPULATED_RANKS { if (full_shift < -ctrl->timings[channel][slotrank].val_320c) full_shift = -ctrl->timings[channel][slotrank].val_320c; } for (slot = 0; slot < NUM_SLOTS; slot++) switch ((ctrl->rankmap[channel] >> (2 * slot)) & 3) { case 0: default: slot320c[slot] = 0x7f; break; case 1: slot320c[slot] = ctrl->timings[channel][2 * slot + 0].val_320c + full_shift; break; case 2: slot320c[slot] = ctrl->timings[channel][2 * slot + 1].val_320c + full_shift; break; case 3: slot320c[slot] = (ctrl->timings[channel][2 * slot].val_320c + ctrl->timings[channel][2 * slot + 1].val_320c) / 2 + full_shift; break; } /* enable CMD XOVER */ reg32 = get_XOVER_CMD(ctrl->rankmap[channel]); reg32 |= ((slot320c[0] & 0x3f) << 6) | ((slot320c[0] & 0x40) << 9); reg32 |= (slot320c[1] & 0x7f) << 18; reg32 |= (full_shift & 0x3f) | ((full_shift & 0x40) << 6); MCHBAR32(0x320c + 0x100 * channel) = reg32; /* enable CLK XOVER */ reg_c14 = get_XOVER_CLK(ctrl->rankmap[channel]); reg_c18 = 0; FOR_ALL_POPULATED_RANKS { int shift = ctrl->timings[channel][slotrank].val_320c + full_shift; int offset_val_c14; if (shift < 0) shift = 0; offset_val_c14 = ctrl->reg_c14_offset + shift; /* set CLK phase shift */ reg_c14 |= (offset_val_c14 & 0x3f) << (6 * slotrank); reg_c18 |= ((offset_val_c14 >> 6) & 1) << slotrank; } MCHBAR32(0xc14 + channel * 0x100) = reg_c14; MCHBAR32(0xc18 + channel * 0x100) = reg_c18; reg_4028 = MCHBAR32(0x4028 + 0x400 * channel); reg_4028 &= 0xffff0000; reg_4024 = 0; FOR_ALL_POPULATED_RANKS { int post_timA_min_high = 7, post_timA_max_high = 0; int pre_timA_min_high = 7, pre_timA_max_high = 0; int shift_402x = 0; int shift = ctrl->timings[channel][slotrank].val_320c + full_shift; if (shift < 0) shift = 0; FOR_ALL_LANES { post_timA_min_high = MIN(post_timA_min_high, (ctrl->timings[channel][slotrank].lanes[lane]. timA + shift) >> 6); pre_timA_min_high = MIN(pre_timA_min_high, ctrl->timings[channel][slotrank].lanes[lane]. timA >> 6); post_timA_max_high = MAX(post_timA_max_high, (ctrl->timings[channel][slotrank].lanes[lane]. timA + shift) >> 6); pre_timA_max_high = MAX(pre_timA_max_high, ctrl->timings[channel][slotrank].lanes[lane]. timA >> 6); } if (pre_timA_max_high - pre_timA_min_high < post_timA_max_high - post_timA_min_high) shift_402x = +1; else if (pre_timA_max_high - pre_timA_min_high > post_timA_max_high - post_timA_min_high) shift_402x = -1; reg_4028 |= (ctrl->timings[channel][slotrank].val_4028 + shift_402x - post_timA_min_high) << (4 * slotrank); reg_4024 |= (ctrl->timings[channel][slotrank].val_4024 + shift_402x) << (8 * slotrank); FOR_ALL_LANES { MCHBAR32(lane_registers[lane] + 0x10 + 0x100 * channel + 4 * slotrank) = (((ctrl->timings[channel][slotrank].lanes[lane]. timA + shift) & 0x3f) | ((ctrl->timings[channel][slotrank].lanes[lane]. rising + shift) << 8) | (((ctrl->timings[channel][slotrank].lanes[lane]. timA + shift - (post_timA_min_high << 6)) & 0x1c0) << 10) | ((ctrl->timings[channel][slotrank].lanes[lane]. falling + shift) << 20)); MCHBAR32(lane_registers[lane] + 0x20 + 0x100 * channel + 4 * slotrank) = (((ctrl->timings[channel][slotrank].lanes[lane]. timC + shift) & 0x3f) | (((ctrl->timings[channel][slotrank].lanes[lane]. timB + shift) & 0x3f) << 8) | (((ctrl->timings[channel][slotrank].lanes[lane]. timB + shift) & 0x1c0) << 9) | (((ctrl->timings[channel][slotrank].lanes[lane]. timC + shift) & 0x40) << 13)); } } MCHBAR32(0x4024 + 0x400 * channel) = reg_4024; MCHBAR32(0x4028 + 0x400 * channel) = reg_4028; } static void test_timA(ramctr_timing * ctrl, int channel, int slotrank) { wait_428c(channel); /* DRAM command MRS * write MR3 MPR enable * in this mode only RD and RDA are allowed * all reads return a predefined pattern */ write32(DEFAULT_MCHBAR + 0x4220 + 0x400 * channel, 0x1f000); write32(DEFAULT_MCHBAR + 0x4230 + 0x400 * channel, (0xc01 | (ctrl->tMOD << 16))); write32(DEFAULT_MCHBAR + 0x4200 + 0x400 * channel, (slotrank << 24) | 0x360004); write32(DEFAULT_MCHBAR + 0x4210 + 0x400 * channel, 0); /* DRAM command RD */ write32(DEFAULT_MCHBAR + 0x4224 + 0x400 * channel, 0x1f105); write32(DEFAULT_MCHBAR + 0x4234 + 0x400 * channel, 0x4040c01); write32(DEFAULT_MCHBAR + 0x4204 + 0x400 * channel, (slotrank << 24)); write32(DEFAULT_MCHBAR + 0x4214 + 0x400 * channel, 0); /* DRAM command RD */ write32(DEFAULT_MCHBAR + 0x4228 + 0x400 * channel, 0x1f105); write32(DEFAULT_MCHBAR + 0x4238 + 0x400 * channel, 0x100f | ((ctrl->CAS + 36) << 16)); write32(DEFAULT_MCHBAR + 0x4208 + 0x400 * channel, (slotrank << 24) | 0x60000); write32(DEFAULT_MCHBAR + 0x4218 + 0x400 * channel, 0); /* DRAM command MRS * write MR3 MPR disable */ write32(DEFAULT_MCHBAR + 0x422c + 0x400 * channel, 0x1f000); write32(DEFAULT_MCHBAR + 0x423c + 0x400 * channel, (0xc01 | (ctrl->tMOD << 16))); write32(DEFAULT_MCHBAR + 0x420c + 0x400 * channel, (slotrank << 24) | 0x360000); write32(DEFAULT_MCHBAR + 0x421c + 0x400 * channel, 0); write32(DEFAULT_MCHBAR + 0x4284 + 0x400 * channel, 0xc0001); wait_428c(channel); } static int does_lane_work(ramctr_timing * ctrl, int channel, int slotrank, int lane) { u32 timA = ctrl->timings[channel][slotrank].lanes[lane].timA; return ((read32 (DEFAULT_MCHBAR + lane_registers[lane] + channel * 0x100 + 4 + ((timA / 32) & 1) * 4) >> (timA % 32)) & 1); } struct run { int middle; int end; int start; int all; int length; }; static struct run get_longest_zero_run(int *seq, int sz) { int i, ls; int bl = 0, bs = 0; struct run ret; ls = 0; for (i = 0; i < 2 * sz; i++) if (seq[i % sz]) { if (i - ls > bl) { bl = i - ls; bs = ls; } ls = i + 1; } if (bl == 0) { ret.middle = sz / 2; ret.start = 0; ret.end = sz; ret.all = 1; return ret; } ret.start = bs % sz; ret.end = (bs + bl - 1) % sz; ret.middle = (bs + (bl - 1) / 2) % sz; ret.length = bl; ret.all = 0; return ret; } static void discover_timA_coarse(ramctr_timing * ctrl, int channel, int slotrank, int *upperA) { int timA; int statistics[NUM_LANES][128]; int lane; for (timA = 0; timA < 128; timA++) { FOR_ALL_LANES { ctrl->timings[channel][slotrank].lanes[lane].timA = timA; } program_timings(ctrl, channel); test_timA(ctrl, channel, slotrank); FOR_ALL_LANES { statistics[lane][timA] = !does_lane_work(ctrl, channel, slotrank, lane); } } FOR_ALL_LANES { struct run rn = get_longest_zero_run(statistics[lane], 128); ctrl->timings[channel][slotrank].lanes[lane].timA = rn.middle; upperA[lane] = rn.end; if (upperA[lane] < rn.middle) upperA[lane] += 128; printram("timA: %d, %d, %d: 0x%02x-0x%02x-0x%02x\n", channel, slotrank, lane, rn.start, rn.middle, rn.end); } } static void discover_timA_fine(ramctr_timing * ctrl, int channel, int slotrank, int *upperA) { int timA_delta; int statistics[NUM_LANES][51]; int lane, i; memset(statistics, 0, sizeof(statistics)); for (timA_delta = -25; timA_delta <= 25; timA_delta++) { FOR_ALL_LANES ctrl->timings[channel][slotrank].lanes[lane]. timA = upperA[lane] + timA_delta + 0x40; program_timings(ctrl, channel); for (i = 0; i < 100; i++) { test_timA(ctrl, channel, slotrank); FOR_ALL_LANES { statistics[lane][timA_delta + 25] += does_lane_work(ctrl, channel, slotrank, lane); } } } FOR_ALL_LANES { int last_zero, first_all; for (last_zero = -25; last_zero <= 25; last_zero++) if (statistics[lane][last_zero + 25]) break; last_zero--; for (first_all = -25; first_all <= 25; first_all++) if (statistics[lane][first_all + 25] == 100) break; printram("lane %d: %d, %d\n", lane, last_zero, first_all); ctrl->timings[channel][slotrank].lanes[lane].timA = (last_zero + first_all) / 2 + upperA[lane]; printram("Aval: %d, %d, %d: %x\n", channel, slotrank, lane, ctrl->timings[channel][slotrank].lanes[lane].timA); } } static int discover_402x(ramctr_timing *ctrl, int channel, int slotrank, int *upperA) { int works[NUM_LANES]; int lane; while (1) { int all_works = 1, some_works = 0; program_timings(ctrl, channel); test_timA(ctrl, channel, slotrank); FOR_ALL_LANES { works[lane] = !does_lane_work(ctrl, channel, slotrank, lane); if (works[lane]) some_works = 1; else all_works = 0; } if (all_works) return 0; if (!some_works) { if (ctrl->timings[channel][slotrank].val_4024 < 2) { printk(BIOS_EMERG, "402x discovery failed (1): %d, %d\n", channel, slotrank); return MAKE_ERR; } ctrl->timings[channel][slotrank].val_4024 -= 2; printram("4024 -= 2;\n"); continue; } ctrl->timings[channel][slotrank].val_4028 += 2; printram("4028 += 2;\n"); if (ctrl->timings[channel][slotrank].val_4028 >= 0x10) { printk(BIOS_EMERG, "402x discovery failed (2): %d, %d\n", channel, slotrank); return MAKE_ERR; } FOR_ALL_LANES if (works[lane]) { ctrl->timings[channel][slotrank].lanes[lane].timA += 128; upperA[lane] += 128; printram("increment %d, %d, %d\n", channel, slotrank, lane); } } return 0; } struct timA_minmax { int timA_min_high, timA_max_high; }; static void pre_timA_change(ramctr_timing * ctrl, int channel, int slotrank, struct timA_minmax *mnmx) { int lane; mnmx->timA_min_high = 7; mnmx->timA_max_high = 0; FOR_ALL_LANES { if (mnmx->timA_min_high > (ctrl->timings[channel][slotrank].lanes[lane].timA >> 6)) mnmx->timA_min_high = (ctrl->timings[channel][slotrank].lanes[lane]. timA >> 6); if (mnmx->timA_max_high < (ctrl->timings[channel][slotrank].lanes[lane].timA >> 6)) mnmx->timA_max_high = (ctrl->timings[channel][slotrank].lanes[lane]. timA >> 6); } } static void post_timA_change(ramctr_timing * ctrl, int channel, int slotrank, struct timA_minmax *mnmx) { struct timA_minmax post; int shift_402x = 0; /* Get changed maxima. */ pre_timA_change(ctrl, channel, slotrank, &post); if (mnmx->timA_max_high - mnmx->timA_min_high < post.timA_max_high - post.timA_min_high) shift_402x = +1; else if (mnmx->timA_max_high - mnmx->timA_min_high > post.timA_max_high - post.timA_min_high) shift_402x = -1; else shift_402x = 0; ctrl->timings[channel][slotrank].val_4028 += shift_402x; ctrl->timings[channel][slotrank].val_4024 += shift_402x; printram("4024 += %d;\n", shift_402x); printram("4028 += %d;\n", shift_402x); } /* Compensate the skew between DQS and DQs. * To ease PCB design a small skew between Data Strobe signals and * Data Signals is allowed. * The controller has to measure and compensate this skew for every byte-lane. * By delaying either all DQs signals or DQS signal, a full phase * shift can be introduced. * It is assumed that one byte-lane's DQs signals have the same routing delay. * * To measure the actual skew, the DRAM is placed in "read leveling" mode. * In read leveling mode the DRAM-chip outputs an alternating periodic pattern. * The memory controller iterates over all possible values to do a full phase shift * and issues read commands. * With DQS and DQs in phase the data read is expected to alternate on every byte: * 0xFF 0x00 0xFF ... * Once the controller has detected this pattern a bit in the result register is * set for the current phase shift. */ int read_training(ramctr_timing * ctrl) { int channel, slotrank, lane; int err; FOR_ALL_CHANNELS FOR_ALL_POPULATED_RANKS { int all_high, some_high; int upperA[NUM_LANES]; struct timA_minmax mnmx; wait_428c(channel); /* DRAM command PREA */ write32(DEFAULT_MCHBAR + 0x4220 + 0x400 * channel, 0x1f002); write32(DEFAULT_MCHBAR + 0x4230 + 0x400 * channel, 0xc01 | (ctrl->tRP << 16)); write32(DEFAULT_MCHBAR + 0x4200 + 0x400 * channel, (slotrank << 24) | 0x60400); write32(DEFAULT_MCHBAR + 0x4210 + 0x400 * channel, 0); write32(DEFAULT_MCHBAR + 0x4284 + 0x400 * channel, 1); write32(DEFAULT_MCHBAR + 0x3400, (slotrank << 2) | 0x8001); ctrl->timings[channel][slotrank].val_4028 = 4; ctrl->timings[channel][slotrank].val_4024 = 55; program_timings(ctrl, channel); discover_timA_coarse(ctrl, channel, slotrank, upperA); all_high = 1; some_high = 0; FOR_ALL_LANES { if (ctrl->timings[channel][slotrank].lanes[lane]. timA >= 0x40) some_high = 1; else all_high = 0; } if (all_high) { ctrl->timings[channel][slotrank].val_4028--; printram("4028--;\n"); FOR_ALL_LANES { ctrl->timings[channel][slotrank].lanes[lane]. timA -= 0x40; upperA[lane] -= 0x40; } } else if (some_high) { ctrl->timings[channel][slotrank].val_4024++; ctrl->timings[channel][slotrank].val_4028++; printram("4024++;\n"); printram("4028++;\n"); } program_timings(ctrl, channel); pre_timA_change(ctrl, channel, slotrank, &mnmx); err = discover_402x(ctrl, channel, slotrank, upperA); if (err) return err; post_timA_change(ctrl, channel, slotrank, &mnmx); pre_timA_change(ctrl, channel, slotrank, &mnmx); discover_timA_fine(ctrl, channel, slotrank, upperA); post_timA_change(ctrl, channel, slotrank, &mnmx); pre_timA_change(ctrl, channel, slotrank, &mnmx); FOR_ALL_LANES { ctrl->timings[channel][slotrank].lanes[lane].timA -= mnmx.timA_min_high * 0x40; } ctrl->timings[channel][slotrank].val_4028 -= mnmx.timA_min_high; printram("4028 -= %d;\n", mnmx.timA_min_high); post_timA_change(ctrl, channel, slotrank, &mnmx); printram("4/8: %d, %d, %x, %x\n", channel, slotrank, ctrl->timings[channel][slotrank].val_4024, ctrl->timings[channel][slotrank].val_4028); printram("final results:\n"); FOR_ALL_LANES printram("Aval: %d, %d, %d: %x\n", channel, slotrank, lane, ctrl->timings[channel][slotrank].lanes[lane].timA); write32(DEFAULT_MCHBAR + 0x3400, 0); toggle_io_reset(); } FOR_ALL_POPULATED_CHANNELS { program_timings(ctrl, channel); } FOR_ALL_CHANNELS FOR_ALL_POPULATED_RANKS FOR_ALL_LANES { write32(DEFAULT_MCHBAR + 0x4080 + 0x400 * channel + 4 * lane, 0); } return 0; } static void test_timC(ramctr_timing * ctrl, int channel, int slotrank) { int lane; FOR_ALL_LANES { write32(DEFAULT_MCHBAR + 0x4340 + 0x400 * channel + 4 * lane, 0); read32(DEFAULT_MCHBAR + 0x4140 + 0x400 * channel + 4 * lane); } wait_428c(channel); /* DRAM command ACT */ write32(DEFAULT_MCHBAR + 0x4220 + 0x400 * channel, 0x1f006); write32(DEFAULT_MCHBAR + 0x4230 + 0x400 * channel, (max((ctrl->tFAW >> 2) + 1, ctrl->tRRD) << 10) | 4 | (ctrl->tRCD << 16)); write32(DEFAULT_MCHBAR + 0x4200 + 0x400 * channel, (slotrank << 24) | (6 << 16)); write32(DEFAULT_MCHBAR + 0x4210 + 0x400 * channel, 0x244); /* DRAM command NOP */ write32(DEFAULT_MCHBAR + 0x4224 + 0x400 * channel, 0x1f207); write32(DEFAULT_MCHBAR + 0x4234 + 0x400 * channel, 0x8041001); write32(DEFAULT_MCHBAR + 0x4204 + 0x400 * channel, (slotrank << 24) | 8); write32(DEFAULT_MCHBAR + 0x4214 + 0x400 * channel, 0x3e0); /* DRAM command WR */ write32(DEFAULT_MCHBAR + 0x4228 + 0x400 * channel, 0x1f201); write32(DEFAULT_MCHBAR + 0x4238 + 0x400 * channel, 0x80411f4); write32(DEFAULT_MCHBAR + 0x4208 + 0x400 * channel, (slotrank << 24)); write32(DEFAULT_MCHBAR + 0x4218 + 0x400 * channel, 0x242); /* DRAM command NOP */ write32(DEFAULT_MCHBAR + 0x422c + 0x400 * channel, 0x1f207); write32(DEFAULT_MCHBAR + 0x423c + 0x400 * channel, 0x8000c01 | ((ctrl->CWL + ctrl->tWTR + 5) << 16)); write32(DEFAULT_MCHBAR + 0x420c + 0x400 * channel, (slotrank << 24) | 8); write32(DEFAULT_MCHBAR + 0x421c + 0x400 * channel, 0x3e0); write32(DEFAULT_MCHBAR + 0x4284 + 0x400 * channel, 0xc0001); wait_428c(channel); /* DRAM command PREA */ write32(DEFAULT_MCHBAR + 0x4220 + 0x400 * channel, 0x1f002); write32(DEFAULT_MCHBAR + 0x4230 + 0x400 * channel, 0xc01 | (ctrl->tRP << 16)); write32(DEFAULT_MCHBAR + 0x4200 + 0x400 * channel, (slotrank << 24) | 0x60400); write32(DEFAULT_MCHBAR + 0x4210 + 0x400 * channel, 0x240); /* DRAM command ACT */ write32(DEFAULT_MCHBAR + 0x4224 + 0x400 * channel, 0x1f006); write32(DEFAULT_MCHBAR + 0x4234 + 0x400 * channel, (max(ctrl->tRRD, (ctrl->tFAW >> 2) + 1) << 10) | 8 | (ctrl->CAS << 16)); write32(DEFAULT_MCHBAR + 0x4204 + 0x400 * channel, (slotrank << 24) | 0x60000); write32(DEFAULT_MCHBAR + 0x4214 + 0x400 * channel, 0x244); /* DRAM command RD */ write32(DEFAULT_MCHBAR + 0x4228 + 0x400 * channel, 0x1f105); write32(DEFAULT_MCHBAR + 0x4238 + 0x400 * channel, 0x40011f4 | (max(ctrl->tRTP, 8) << 16)); write32(DEFAULT_MCHBAR + 0x4208 + 0x400 * channel, (slotrank << 24)); write32(DEFAULT_MCHBAR + 0x4218 + 0x400 * channel, 0x242); /* DRAM command PREA */ write32(DEFAULT_MCHBAR + 0x422c + 0x400 * channel, 0x1f002); write32(DEFAULT_MCHBAR + 0x423c + 0x400 * channel, 0xc01 | (ctrl->tRP << 16)); write32(DEFAULT_MCHBAR + 0x420c + 0x400 * channel, (slotrank << 24) | 0x60400); write32(DEFAULT_MCHBAR + 0x421c + 0x400 * channel, 0x240); write32(DEFAULT_MCHBAR + 0x4284 + 0x400 * channel, 0xc0001); wait_428c(channel); } static int discover_timC(ramctr_timing *ctrl, int channel, int slotrank) { int timC; int statistics[NUM_LANES][MAX_TIMC + 1]; int lane; wait_428c(channel); /* DRAM command PREA */ write32(DEFAULT_MCHBAR + 0x4220 + 0x400 * channel, 0x1f002); write32(DEFAULT_MCHBAR + 0x4230 + 0x400 * channel, 0xc01 | (ctrl->tRP << 16)); write32(DEFAULT_MCHBAR + 0x4200 + 0x400 * channel, (slotrank << 24) | 0x60400); write32(DEFAULT_MCHBAR + 0x4210 + 0x400 * channel, 0x240); write32(DEFAULT_MCHBAR + 0x4284 + 0x400 * channel, 1); for (timC = 0; timC <= MAX_TIMC; timC++) { FOR_ALL_LANES ctrl->timings[channel][slotrank].lanes[lane]. timC = timC; program_timings(ctrl, channel); test_timC(ctrl, channel, slotrank); FOR_ALL_LANES { statistics[lane][timC] = read32(DEFAULT_MCHBAR + 0x4340 + 4 * lane + 0x400 * channel); } } FOR_ALL_LANES { struct run rn = get_longest_zero_run(statistics[lane], MAX_TIMC + 1); ctrl->timings[channel][slotrank].lanes[lane].timC = rn.middle; if (rn.all) { printk(BIOS_EMERG, "timC discovery failed: %d, %d, %d\n", channel, slotrank, lane); return MAKE_ERR; } printram("timC: %d, %d, %d: 0x%02x-0x%02x-0x%02x\n", channel, slotrank, lane, rn.start, rn.middle, rn.end); } return 0; } static int get_precedening_channels(ramctr_timing * ctrl, int target_channel) { int channel, ret = 0; FOR_ALL_POPULATED_CHANNELS if (channel < target_channel) ret++; return ret; } static void fill_pattern0(ramctr_timing * ctrl, int channel, u32 a, u32 b) { unsigned j; unsigned channel_offset = get_precedening_channels(ctrl, channel) * 0x40; for (j = 0; j < 16; j++) write32((void *)(0x04000000 + channel_offset + 4 * j), j & 2 ? b : a); sfence(); } static int num_of_channels(const ramctr_timing * ctrl) { int ret = 0; int channel; FOR_ALL_POPULATED_CHANNELS ret++; return ret; } static void fill_pattern1(ramctr_timing * ctrl, int channel) { unsigned j; unsigned channel_offset = get_precedening_channels(ctrl, channel) * 0x40; unsigned channel_step = 0x40 * num_of_channels(ctrl); for (j = 0; j < 16; j++) write32((void *)(0x04000000 + channel_offset + j * 4), 0xffffffff); for (j = 0; j < 16; j++) write32((void *)(0x04000000 + channel_offset + channel_step + j * 4), 0); sfence(); } static void precharge(ramctr_timing * ctrl) { int channel, slotrank, lane; FOR_ALL_POPULATED_CHANNELS { FOR_ALL_POPULATED_RANKS FOR_ALL_LANES { ctrl->timings[channel][slotrank].lanes[lane].falling = 16; ctrl->timings[channel][slotrank].lanes[lane].rising = 16; } program_timings(ctrl, channel); FOR_ALL_POPULATED_RANKS { wait_428c(channel); /* DRAM command MRS * write MR3 MPR enable * in this mode only RD and RDA are allowed * all reads return a predefined pattern */ write32(DEFAULT_MCHBAR + 0x4220 + 0x400 * channel, 0x1f000); write32(DEFAULT_MCHBAR + 0x4230 + 0x400 * channel, 0xc01 | (ctrl->tMOD << 16)); write32(DEFAULT_MCHBAR + 0x4200 + 0x400 * channel, (slotrank << 24) | 0x360004); write32(DEFAULT_MCHBAR + 0x4210 + 0x400 * channel, 0); /* DRAM command RD */ write32(DEFAULT_MCHBAR + 0x4224 + 0x400 * channel, 0x1f105); write32(DEFAULT_MCHBAR + 0x4234 + 0x400 * channel, 0x4041003); write32(DEFAULT_MCHBAR + 0x4204 + 0x400 * channel, (slotrank << 24) | 0); write32(DEFAULT_MCHBAR + 0x4214 + 0x400 * channel, 0); /* DRAM command RD */ write32(DEFAULT_MCHBAR + 0x4228 + 0x400 * channel, 0x1f105); write32(DEFAULT_MCHBAR + 0x4238 + 0x400 * channel, 0x1001 | ((ctrl->CAS + 8) << 16)); write32(DEFAULT_MCHBAR + 0x4208 + 0x400 * channel, (slotrank << 24) | 0x60000); write32(DEFAULT_MCHBAR + 0x4218 + 0x400 * channel, 0); /* DRAM command MRS * write MR3 MPR disable */ write32(DEFAULT_MCHBAR + 0x422c + 0x400 * channel, 0x1f000); write32(DEFAULT_MCHBAR + 0x423c + 0x400 * channel, 0xc01 | (ctrl->tMOD << 16)); write32(DEFAULT_MCHBAR + 0x420c + 0x400 * channel, (slotrank << 24) | 0x360000); write32(DEFAULT_MCHBAR + 0x421c + 0x400 * channel, 0); write32(DEFAULT_MCHBAR + 0x4284 + 0x400 * channel, 0xc0001); wait_428c(channel); } FOR_ALL_POPULATED_RANKS FOR_ALL_LANES { ctrl->timings[channel][slotrank].lanes[lane].falling = 48; ctrl->timings[channel][slotrank].lanes[lane].rising = 48; } program_timings(ctrl, channel); FOR_ALL_POPULATED_RANKS { wait_428c(channel); /* DRAM command MRS * write MR3 MPR enable * in this mode only RD and RDA are allowed * all reads return a predefined pattern */ write32(DEFAULT_MCHBAR + 0x4220 + 0x400 * channel, 0x1f000); write32(DEFAULT_MCHBAR + 0x4230 + 0x400 * channel, 0xc01 | (ctrl->tMOD << 16)); write32(DEFAULT_MCHBAR + 0x4200 + 0x400 * channel, (slotrank << 24) | 0x360004); write32(DEFAULT_MCHBAR + 0x4210 + 0x400 * channel, 0); /* DRAM command RD */ write32(DEFAULT_MCHBAR + 0x4224 + 0x400 * channel, 0x1f105); write32(DEFAULT_MCHBAR + 0x4234 + 0x400 * channel, 0x4041003); write32(DEFAULT_MCHBAR + 0x4204 + 0x400 * channel, (slotrank << 24) | 0); write32(DEFAULT_MCHBAR + 0x4214 + 0x400 * channel, 0); /* DRAM command RD */ write32(DEFAULT_MCHBAR + 0x4228 + 0x400 * channel, 0x1f105); write32(DEFAULT_MCHBAR + 0x4238 + 0x400 * channel, 0x1001 | ((ctrl->CAS + 8) << 16)); write32(DEFAULT_MCHBAR + 0x4208 + 0x400 * channel, (slotrank << 24) | 0x60000); write32(DEFAULT_MCHBAR + 0x4218 + 0x400 * channel, 0); /* DRAM command MRS * write MR3 MPR disable */ write32(DEFAULT_MCHBAR + 0x422c + 0x400 * channel, 0x1f000); write32(DEFAULT_MCHBAR + 0x423c + 0x400 * channel, 0xc01 | (ctrl->tMOD << 16)); write32(DEFAULT_MCHBAR + 0x420c + 0x400 * channel, (slotrank << 24) | 0x360000); write32(DEFAULT_MCHBAR + 0x421c + 0x400 * channel, 0); write32(DEFAULT_MCHBAR + 0x4284 + 0x400 * channel, 0xc0001); wait_428c(channel); } } } static void test_timB(ramctr_timing * ctrl, int channel, int slotrank) { /* enable DQs on this slotrank */ write_mrreg(ctrl, channel, slotrank, 1, 0x80 | make_mr1(ctrl, slotrank, channel)); wait_428c(channel); /* DRAM command NOP */ write32(DEFAULT_MCHBAR + 0x4220 + 0x400 * channel, 0x1f207); write32(DEFAULT_MCHBAR + 0x4230 + 0x400 * channel, 0x8000c01 | ((ctrl->CWL + ctrl->tWLO) << 16)); write32(DEFAULT_MCHBAR + 0x4200 + 0x400 * channel, 8 | (slotrank << 24)); write32(DEFAULT_MCHBAR + 0x4210 + 0x400 * channel, 0); /* DRAM command NOP */ write32(DEFAULT_MCHBAR + 0x4224 + 0x400 * channel, 0x1f107); write32(DEFAULT_MCHBAR + 0x4234 + 0x400 * channel, 0x4000c01 | ((ctrl->CAS + 38) << 16)); write32(DEFAULT_MCHBAR + 0x4204 + 0x400 * channel, (slotrank << 24) | 4); write32(DEFAULT_MCHBAR + 0x4214 + 0x400 * channel, 0); write32(DEFAULT_MCHBAR + 0x400 * channel + 0x4284, 0x40001); wait_428c(channel); /* disable DQs on this slotrank */ write_mrreg(ctrl, channel, slotrank, 1, 0x1080 | make_mr1(ctrl, slotrank, channel)); } static int discover_timB(ramctr_timing *ctrl, int channel, int slotrank) { int timB; int statistics[NUM_LANES][128]; int lane; write32(DEFAULT_MCHBAR + 0x3400, 0x108052 | (slotrank << 2)); for (timB = 0; timB < 128; timB++) { FOR_ALL_LANES { ctrl->timings[channel][slotrank].lanes[lane].timB = timB; } program_timings(ctrl, channel); test_timB(ctrl, channel, slotrank); FOR_ALL_LANES { statistics[lane][timB] = !((read32 (DEFAULT_MCHBAR + lane_registers[lane] + channel * 0x100 + 4 + ((timB / 32) & 1) * 4) >> (timB % 32)) & 1); } } FOR_ALL_LANES { struct run rn = get_longest_zero_run(statistics[lane], 128); /* timC is a direct function of timB's 6 LSBs. * Some tests increments the value of timB by a small value, * which might cause the 6bit value to overflow, if it's close * to 0x3F. Increment the value by a small offset if it's likely * to overflow, to make sure it won't overflow while running * tests and bricks the system due to a non matching timC. * * TODO: find out why some tests (edge write discovery) * increment timB. */ if ((rn.start & 0x3F) == 0x3E) rn.start += 2; else if ((rn.start & 0x3F) == 0x3F) rn.start += 1; ctrl->timings[channel][slotrank].lanes[lane].timB = rn.start; if (rn.all) { printk(BIOS_EMERG, "timB discovery failed: %d, %d, %d\n", channel, slotrank, lane); return MAKE_ERR; } printram("timB: %d, %d, %d: 0x%02x-0x%02x-0x%02x\n", channel, slotrank, lane, rn.start, rn.middle, rn.end); } return 0; } static int get_timB_high_adjust(u64 val) { int i; /* good */ if (val == 0xffffffffffffffffLL) return 0; if (val >= 0xf000000000000000LL) { /* needs negative adjustment */ for (i = 0; i < 8; i++) if (val << (8 * (7 - i) + 4)) return -i; } else { /* needs positive adjustment */ for (i = 0; i < 8; i++) if (val >> (8 * (7 - i) + 4)) return i; } return 8; } static void adjust_high_timB(ramctr_timing * ctrl) { int channel, slotrank, lane, old; write32(DEFAULT_MCHBAR + 0x3400, 0x200); FOR_ALL_POPULATED_CHANNELS { fill_pattern1(ctrl, channel); write32(DEFAULT_MCHBAR + 0x4288 + (channel << 10), 1); } FOR_ALL_POPULATED_CHANNELS FOR_ALL_POPULATED_RANKS { write32(DEFAULT_MCHBAR + 0x4288 + 0x400 * channel, 0x10001); wait_428c(channel); /* DRAM command ACT */ write32(DEFAULT_MCHBAR + 0x4220 + 0x400 * channel, 0x1f006); write32(DEFAULT_MCHBAR + 0x4230 + 0x400 * channel, 0xc01 | (ctrl->tRCD << 16)); write32(DEFAULT_MCHBAR + 0x4200 + 0x400 * channel, (slotrank << 24) | 0x60000); write32(DEFAULT_MCHBAR + 0x4210 + 0x400 * channel, 0); /* DRAM command NOP */ write32(DEFAULT_MCHBAR + 0x4224 + 0x400 * channel, 0x1f207); write32(DEFAULT_MCHBAR + 0x4234 + 0x400 * channel, 0x8040c01); write32(DEFAULT_MCHBAR + 0x4204 + 0x400 * channel, (slotrank << 24) | 0x8); write32(DEFAULT_MCHBAR + 0x4214 + 0x400 * channel, 0x3e0); /* DRAM command WR */ write32(DEFAULT_MCHBAR + 0x4228 + 0x400 * channel, 0x1f201); write32(DEFAULT_MCHBAR + 0x4238 + 0x400 * channel, 0x8041003); write32(DEFAULT_MCHBAR + 0x4208 + 0x400 * channel, (slotrank << 24)); write32(DEFAULT_MCHBAR + 0x4218 + 0x400 * channel, 0x3e2); /* DRAM command NOP */ write32(DEFAULT_MCHBAR + 0x422c + 0x400 * channel, 0x1f207); write32(DEFAULT_MCHBAR + 0x423c + 0x400 * channel, 0x8000c01 | ((ctrl->CWL + ctrl->tWTR + 5) << 16)); write32(DEFAULT_MCHBAR + 0x420c + 0x400 * channel, (slotrank << 24) | 0x8); write32(DEFAULT_MCHBAR + 0x421c + 0x400 * channel, 0x3e0); write32(DEFAULT_MCHBAR + 0x4284 + 0x400 * channel, 0xc0001); wait_428c(channel); /* DRAM command PREA */ write32(DEFAULT_MCHBAR + 0x4220 + 0x400 * channel, 0x1f002); write32(DEFAULT_MCHBAR + 0x4230 + 0x400 * channel, 0xc01 | ((ctrl->tRP) << 16)); write32(DEFAULT_MCHBAR + 0x4200 + 0x400 * channel, (slotrank << 24) | 0x60400); write32(DEFAULT_MCHBAR + 0x4210 + 0x400 * channel, 0x240); /* DRAM command ACT */ write32(DEFAULT_MCHBAR + 0x4224 + 0x400 * channel, 0x1f006); write32(DEFAULT_MCHBAR + 0x4234 + 0x400 * channel, 0xc01 | ((ctrl->tRCD) << 16)); write32(DEFAULT_MCHBAR + 0x4204 + 0x400 * channel, (slotrank << 24) | 0x60000); write32(DEFAULT_MCHBAR + 0x4214 + 0x400 * channel, 0); /* DRAM command RD */ write32(DEFAULT_MCHBAR + 0x4228 + 0x400 * channel, 0x3f105); write32(DEFAULT_MCHBAR + 0x4238 + 0x400 * channel, 0x4000c01 | ((ctrl->tRP + ctrl->timings[channel][slotrank].val_4024 + ctrl->timings[channel][slotrank].val_4028) << 16)); write32(DEFAULT_MCHBAR + 0x4208 + 0x400 * channel, (slotrank << 24) | 0x60008); write32(DEFAULT_MCHBAR + 0x4218 + 0x400 * channel, 0); write32(DEFAULT_MCHBAR + 0x4284 + 0x400 * channel, 0x80001); wait_428c(channel); FOR_ALL_LANES { u64 res = read32(DEFAULT_MCHBAR + lane_registers[lane] + 0x100 * channel + 4); res |= ((u64) read32(DEFAULT_MCHBAR + lane_registers[lane] + 0x100 * channel + 8)) << 32; old = ctrl->timings[channel][slotrank].lanes[lane].timB; ctrl->timings[channel][slotrank].lanes[lane].timB += get_timB_high_adjust(res) * 64; printram("High adjust %d:%016llx\n", lane, res); printram("Bval+: %d, %d, %d, %x -> %x\n", channel, slotrank, lane, old, ctrl->timings[channel][slotrank].lanes[lane]. timB); } } write32(DEFAULT_MCHBAR + 0x3400, 0); } static void write_op(ramctr_timing * ctrl, int channel) { int slotrank; wait_428c(channel); /* choose an existing rank. */ slotrank = !(ctrl->rankmap[channel] & 1) ? 2 : 0; /* DRAM command ACT */ write32(DEFAULT_MCHBAR + 0x4220 + 0x400 * channel, 0x0f003); write32(DEFAULT_MCHBAR + 0x4230 + 0x400 * channel, 0x41001); write32(DEFAULT_MCHBAR + 0x4200 + 0x400 * channel, (slotrank << 24) | 0x60000); write32(DEFAULT_MCHBAR + 0x4210 + 0x400 * channel, 0x3e0); write32(DEFAULT_MCHBAR + 0x4284 + 0x400 * channel, 1); wait_428c(channel); } /* Compensate the skew between CMD/ADDR/CLK and DQ/DQS lanes. * DDR3 adopted the fly-by topology. The data and strobes signals reach * the chips at different times with respect to command, address and * clock signals. * By delaying either all DQ/DQs or all CMD/ADDR/CLK signals, a full phase * shift can be introduced. * It is assumed that the CLK/ADDR/CMD signals have the same routing delay. * * To find the required phase shift the DRAM is placed in "write leveling" mode. * In this mode the DRAM-chip samples the CLK on every DQS edge and feeds back the * sampled value on the data lanes (DQs). */ int write_training(ramctr_timing * ctrl) { int channel, slotrank, lane; int err; FOR_ALL_POPULATED_CHANNELS write32(DEFAULT_MCHBAR + 0x4008 + 0x400 * channel, read32(DEFAULT_MCHBAR + 0x4008 + 0x400 * channel) | 0x8000000); FOR_ALL_POPULATED_CHANNELS { write_op(ctrl, channel); write32(DEFAULT_MCHBAR + 0x4020 + 0x400 * channel, read32(DEFAULT_MCHBAR + 0x4020 + 0x400 * channel) | 0x200000); } /* refresh disable */ write32(DEFAULT_MCHBAR + 0x5030, read32(DEFAULT_MCHBAR + 0x5030) & ~8); FOR_ALL_POPULATED_CHANNELS { write_op(ctrl, channel); } /* enable write leveling on all ranks * disable all DQ outputs * only NOP is allowed in this mode */ FOR_ALL_CHANNELS FOR_ALL_POPULATED_RANKS write_mrreg(ctrl, channel, slotrank, 1, make_mr1(ctrl, slotrank, channel) | 0x1080); write32(DEFAULT_MCHBAR + 0x3400, 0x108052); toggle_io_reset(); /* set any valid value for timB, it gets corrected later */ FOR_ALL_CHANNELS FOR_ALL_POPULATED_RANKS { err = discover_timB(ctrl, channel, slotrank); if (err) return err; } /* disable write leveling on all ranks */ FOR_ALL_CHANNELS FOR_ALL_POPULATED_RANKS write_mrreg(ctrl, channel, slotrank, 1, make_mr1(ctrl, slotrank, channel)); write32(DEFAULT_MCHBAR + 0x3400, 0); FOR_ALL_POPULATED_CHANNELS wait_428c(channel); /* refresh enable */ write32(DEFAULT_MCHBAR + 0x5030, read32(DEFAULT_MCHBAR + 0x5030) | 8); FOR_ALL_POPULATED_CHANNELS { write32(DEFAULT_MCHBAR + 0x4020 + 0x400 * channel, ~0x00200000 & read32(DEFAULT_MCHBAR + 0x4020 + 0x400 * channel)); read32(DEFAULT_MCHBAR + 0x428c + 0x400 * channel); wait_428c(channel); /* DRAM command ZQCS */ write32(DEFAULT_MCHBAR + 0x4220 + 0x400 * channel, 0x0f003); write32(DEFAULT_MCHBAR + 0x4230 + 0x400 * channel, 0x659001); write32(DEFAULT_MCHBAR + 0x4200 + 0x400 * channel, 0x60000); write32(DEFAULT_MCHBAR + 0x4210 + 0x400 * channel, 0x3e0); write32(DEFAULT_MCHBAR + 0x4284 + 0x400 * channel, 1); wait_428c(channel); } toggle_io_reset(); printram("CPE\n"); precharge(ctrl); printram("CPF\n"); FOR_ALL_CHANNELS FOR_ALL_POPULATED_RANKS FOR_ALL_LANES { read32(DEFAULT_MCHBAR + 0x4080 + 0x400 * channel + 4 * lane); write32(DEFAULT_MCHBAR + 0x4080 + 0x400 * channel + 4 * lane, 0); } FOR_ALL_POPULATED_CHANNELS { fill_pattern0(ctrl, channel, 0xaaaaaaaa, 0x55555555); write32(DEFAULT_MCHBAR + 0x4288 + (channel << 10), 0); } FOR_ALL_CHANNELS FOR_ALL_POPULATED_RANKS { err = discover_timC(ctrl, channel, slotrank); if (err) return err; } FOR_ALL_POPULATED_CHANNELS program_timings(ctrl, channel); /* measure and adjust timB timings */ adjust_high_timB(ctrl); FOR_ALL_POPULATED_CHANNELS program_timings(ctrl, channel); FOR_ALL_CHANNELS FOR_ALL_POPULATED_RANKS FOR_ALL_LANES { read32(DEFAULT_MCHBAR + 0x4080 + 0x400 * channel + 4 * lane); write32(DEFAULT_MCHBAR + 0x4080 + 0x400 * channel + 4 * lane, 0); } return 0; } static int test_320c(ramctr_timing * ctrl, int channel, int slotrank) { struct ram_rank_timings saved_rt = ctrl->timings[channel][slotrank]; int timC_delta; int lanes_ok = 0; int ctr = 0; int lane; for (timC_delta = -5; timC_delta <= 5; timC_delta++) { FOR_ALL_LANES { ctrl->timings[channel][slotrank].lanes[lane].timC = saved_rt.lanes[lane].timC + timC_delta; } program_timings(ctrl, channel); FOR_ALL_LANES { write32(DEFAULT_MCHBAR + 4 * lane + 0x4f40, 0); } write32(DEFAULT_MCHBAR + 0x4288 + 0x400 * channel, 0x1f); wait_428c(channel); /* DRAM command ACT */ write32(DEFAULT_MCHBAR + 0x4220 + 0x400 * channel, 0x1f006); write32(DEFAULT_MCHBAR + 0x4230 + 0x400 * channel, ((max(ctrl->tRRD, (ctrl->tFAW >> 2) + 1)) << 10) | 8 | (ctrl->tRCD << 16)); write32(DEFAULT_MCHBAR + 0x4200 + 0x400 * channel, (slotrank << 24) | ctr | 0x60000); write32(DEFAULT_MCHBAR + 0x4210 + 0x400 * channel, 0x244); /* DRAM command WR */ write32(DEFAULT_MCHBAR + 0x4224 + 0x400 * channel, 0x1f201); write32(DEFAULT_MCHBAR + 0x4234 + 0x400 * channel, 0x8001020 | ((ctrl->CWL + ctrl->tWTR + 8) << 16)); write32(DEFAULT_MCHBAR + 0x4204 + 0x400 * channel, (slotrank << 24)); write32(DEFAULT_MCHBAR + 0x4244 + 0x400 * channel, 0x389abcd); write32(DEFAULT_MCHBAR + 0x4214 + 0x400 * channel, 0x20e42); /* DRAM command RD */ write32(DEFAULT_MCHBAR + 0x4228 + 0x400 * channel, 0x1f105); write32(DEFAULT_MCHBAR + 0x4238 + 0x400 * channel, 0x4001020 | (max(ctrl->tRTP, 8) << 16)); write32(DEFAULT_MCHBAR + 0x4208 + 0x400 * channel, (slotrank << 24)); write32(DEFAULT_MCHBAR + 0x4248 + 0x400 * channel, 0x389abcd); write32(DEFAULT_MCHBAR + 0x4218 + 0x400 * channel, 0x20e42); /* DRAM command PRE */ write32(DEFAULT_MCHBAR + 0x422c + 0x400 * channel, 0x1f002); write32(DEFAULT_MCHBAR + 0x423c + 0x400 * channel, 0xf1001); write32(DEFAULT_MCHBAR + 0x420c + 0x400 * channel, (slotrank << 24) | 0x60400); write32(DEFAULT_MCHBAR + 0x421c + 0x400 * channel, 0x240); write32(DEFAULT_MCHBAR + 0x4284 + 0x400 * channel, 0xc0001); wait_428c(channel); FOR_ALL_LANES { u32 r32 = read32(DEFAULT_MCHBAR + 0x4340 + 4 * lane + 0x400 * channel); if (r32 == 0) lanes_ok |= 1 << lane; } ctr++; if (lanes_ok == ((1 << NUM_LANES) - 1)) break; } ctrl->timings[channel][slotrank] = saved_rt; return lanes_ok != ((1 << NUM_LANES) - 1); } #include "raminit_patterns.h" static void fill_pattern5(ramctr_timing * ctrl, int channel, int patno) { unsigned i, j; unsigned channel_offset = get_precedening_channels(ctrl, channel) * 0x40; unsigned channel_step = 0x40 * num_of_channels(ctrl); if (patno) { u8 base8 = 0x80 >> ((patno - 1) % 8); u32 base = base8 | (base8 << 8) | (base8 << 16) | (base8 << 24); for (i = 0; i < 32; i++) { for (j = 0; j < 16; j++) { u32 val = use_base[patno - 1][i] & (1 << (j / 2)) ? base : 0; if (invert[patno - 1][i] & (1 << (j / 2))) val = ~val; write32((void *)(0x04000000 + channel_offset + i * channel_step + j * 4), val); } } } else { for (i = 0; i < sizeof(pattern) / sizeof(pattern[0]); i++) { for (j = 0; j < 16; j++) write32((void *)(0x04000000 + channel_offset + i * channel_step + j * 4), pattern[i][j]); } sfence(); } } static void reprogram_320c(ramctr_timing * ctrl) { int channel, slotrank; FOR_ALL_POPULATED_CHANNELS { wait_428c(channel); /* choose an existing rank. */ slotrank = !(ctrl->rankmap[channel] & 1) ? 2 : 0; /* DRAM command ZQCS */ write32(DEFAULT_MCHBAR + 0x4220 + 0x400 * channel, 0x0f003); write32(DEFAULT_MCHBAR + 0x4230 + 0x400 * channel, 0x41001); write32(DEFAULT_MCHBAR + 0x4200 + 0x400 * channel, (slotrank << 24) | 0x60000); write32(DEFAULT_MCHBAR + 0x4210 + 0x400 * channel, 0x3e0); write32(DEFAULT_MCHBAR + 0x4284 + 0x400 * channel, 1); wait_428c(channel); write32(DEFAULT_MCHBAR + 0x4020 + 0x400 * channel, read32(DEFAULT_MCHBAR + 0x4020 + 0x400 * channel) | 0x200000); } /* refresh disable */ write32(DEFAULT_MCHBAR + 0x5030, read32(DEFAULT_MCHBAR + 0x5030) & ~8); FOR_ALL_POPULATED_CHANNELS { wait_428c(channel); /* choose an existing rank. */ slotrank = !(ctrl->rankmap[channel] & 1) ? 2 : 0; /* DRAM command ZQCS */ write32(DEFAULT_MCHBAR + 0x4220 + 0x400 * channel, 0x0f003); write32(DEFAULT_MCHBAR + 0x4230 + 0x400 * channel, 0x41001); write32(DEFAULT_MCHBAR + 0x4200 + 0x400 * channel, (slotrank << 24) | 0x60000); write32(DEFAULT_MCHBAR + 0x4210 + 0x400 * channel, 0x3e0); write32(DEFAULT_MCHBAR + 0x4284 + 0x400 * channel, 1); wait_428c(channel); } /* jedec reset */ dram_jedecreset(ctrl); /* mrs commands. */ dram_mrscommands(ctrl); toggle_io_reset(); } #define MIN_C320C_LEN 13 static int try_cmd_stretch(ramctr_timing *ctrl, int channel, int cmd_stretch) { struct ram_rank_timings saved_timings[NUM_CHANNELS][NUM_SLOTRANKS]; int slotrank; int c320c; int stat[NUM_SLOTRANKS][256]; int delta = 0; printram("Trying cmd_stretch %d on channel %d\n", cmd_stretch, channel); FOR_ALL_POPULATED_RANKS { saved_timings[channel][slotrank] = ctrl->timings[channel][slotrank]; } ctrl->cmd_stretch[channel] = cmd_stretch; MCHBAR32(0x4004 + 0x400 * channel) = ctrl->tRRD | (ctrl->tRTP << 4) | (ctrl->tCKE << 8) | (ctrl->tWTR << 12) | (ctrl->tFAW << 16) | (ctrl->tWR << 24) | (ctrl->cmd_stretch[channel] << 30); if (ctrl->cmd_stretch[channel] == 2) delta = 2; else if (ctrl->cmd_stretch[channel] == 0) delta = 4; FOR_ALL_POPULATED_RANKS { ctrl->timings[channel][slotrank].val_4024 -= delta; } for (c320c = -127; c320c <= 127; c320c++) { FOR_ALL_POPULATED_RANKS { ctrl->timings[channel][slotrank].val_320c = c320c; } program_timings(ctrl, channel); reprogram_320c(ctrl); FOR_ALL_POPULATED_RANKS { stat[slotrank][c320c + 127] = test_320c(ctrl, channel, slotrank); } } FOR_ALL_POPULATED_RANKS { struct run rn = get_longest_zero_run(stat[slotrank], 255); ctrl->timings[channel][slotrank].val_320c = rn.middle - 127; printram("cmd_stretch: %d, %d: 0x%02x-0x%02x-0x%02x\n", channel, slotrank, rn.start, rn.middle, rn.end); if (rn.all || rn.length < MIN_C320C_LEN) { FOR_ALL_POPULATED_RANKS { ctrl->timings[channel][slotrank] = saved_timings[channel][slotrank]; } return MAKE_ERR; } } return 0; } /* Adjust CMD phase shift and try multiple command rates. * A command rate of 2T doubles the time needed for address and * command decode. */ int command_training(ramctr_timing *ctrl) { int channel; FOR_ALL_POPULATED_CHANNELS { fill_pattern5(ctrl, channel, 0); write32(DEFAULT_MCHBAR + 0x4288 + 0x400 * channel, 0x1f); } FOR_ALL_POPULATED_CHANNELS { int cmdrate, err; /* * Dual DIMM per channel: * Issue: While c320c discovery seems to succeed raminit * will fail in write training. * Workaround: Skip 1T in dual DIMM mode, that's only * supported by a few DIMMs. * TODO: How to detect "1T" DIMMs ? * * Single DIMM per channel: * Try command rate 1T and 2T */ cmdrate = ((ctrl->rankmap[channel] & 0x5) == 0x5); for (; cmdrate < 2; cmdrate++) { err = try_cmd_stretch(ctrl, channel, cmdrate << 1); if (!err) break; } if (err) { printk(BIOS_EMERG, "c320c discovery failed\n"); return err; } printram("Using CMD rate %uT on channel %u\n", cmdrate + 1, channel); } FOR_ALL_POPULATED_CHANNELS program_timings(ctrl, channel); reprogram_320c(ctrl); return 0; } static int discover_edges_real(ramctr_timing *ctrl, int channel, int slotrank, int *edges) { int edge; int statistics[NUM_LANES][MAX_EDGE_TIMING + 1]; int lane; for (edge = 0; edge <= MAX_EDGE_TIMING; edge++) { FOR_ALL_LANES { ctrl->timings[channel][slotrank].lanes[lane].rising = edge; ctrl->timings[channel][slotrank].lanes[lane].falling = edge; } program_timings(ctrl, channel); FOR_ALL_LANES { write32(DEFAULT_MCHBAR + 0x4340 + 0x400 * channel + 4 * lane, 0); read32(DEFAULT_MCHBAR + 0x400 * channel + 4 * lane + 0x4140); } wait_428c(channel); /* DRAM command MRS * write MR3 MPR enable * in this mode only RD and RDA are allowed * all reads return a predefined pattern */ write32(DEFAULT_MCHBAR + 0x4220 + 0x400 * channel, 0x1f000); write32(DEFAULT_MCHBAR + 0x4230 + 0x400 * channel, (0xc01 | (ctrl->tMOD << 16))); write32(DEFAULT_MCHBAR + 0x4200 + 0x400 * channel, (slotrank << 24) | 0x360004); write32(DEFAULT_MCHBAR + 0x4210 + 0x400 * channel, 0); /* DRAM command RD */ write32(DEFAULT_MCHBAR + 0x4224 + 0x400 * channel, 0x1f105); write32(DEFAULT_MCHBAR + 0x4234 + 0x400 * channel, 0x40411f4); write32(DEFAULT_MCHBAR + 0x4204 + 0x400 * channel, (slotrank << 24)); write32(DEFAULT_MCHBAR + 0x4214 + 0x400 * channel, 0); /* DRAM command RD */ write32(DEFAULT_MCHBAR + 0x4228 + 0x400 * channel, 0x1f105); write32(DEFAULT_MCHBAR + 0x4238 + 0x400 * channel, 0x1001 | ((ctrl->CAS + 8) << 16)); write32(DEFAULT_MCHBAR + 0x4208 + 0x400 * channel, (slotrank << 24) | 0x60000); write32(DEFAULT_MCHBAR + 0x4218 + 0x400 * channel, 0); /* DRAM command MRS * MR3 disable MPR */ write32(DEFAULT_MCHBAR + 0x422c + 0x400 * channel, 0x1f000); write32(DEFAULT_MCHBAR + 0x423c + 0x400 * channel, (0xc01 | (ctrl->tMOD << 16))); write32(DEFAULT_MCHBAR + 0x420c + 0x400 * channel, (slotrank << 24) | 0x360000); write32(DEFAULT_MCHBAR + 0x421c + 0x400 * channel, 0); write32(DEFAULT_MCHBAR + 0x4284 + 0x400 * channel, 0xc0001); wait_428c(channel); FOR_ALL_LANES { statistics[lane][edge] = read32(DEFAULT_MCHBAR + 0x4340 + 0x400 * channel + lane * 4); } } FOR_ALL_LANES { struct run rn = get_longest_zero_run(statistics[lane], MAX_EDGE_TIMING + 1); edges[lane] = rn.middle; if (rn.all) { printk(BIOS_EMERG, "edge discovery failed: %d, %d, %d\n", channel, slotrank, lane); return MAKE_ERR; } printram("eval %d, %d, %d: %02x\n", channel, slotrank, lane, edges[lane]); } return 0; } int discover_edges(ramctr_timing *ctrl) { int falling_edges[NUM_CHANNELS][NUM_SLOTRANKS][NUM_LANES]; int rising_edges[NUM_CHANNELS][NUM_SLOTRANKS][NUM_LANES]; int channel, slotrank, lane; int err; write32(DEFAULT_MCHBAR + 0x3400, 0); toggle_io_reset(); FOR_ALL_POPULATED_CHANNELS FOR_ALL_LANES { write32(DEFAULT_MCHBAR + 4 * lane + 0x400 * channel + 0x4080, 0); } FOR_ALL_POPULATED_CHANNELS { fill_pattern0(ctrl, channel, 0, 0); write32(DEFAULT_MCHBAR + 0x4288 + (channel << 10), 0); FOR_ALL_LANES { read32(DEFAULT_MCHBAR + 0x400 * channel + lane * 4 + 0x4140); } FOR_ALL_POPULATED_RANKS FOR_ALL_LANES { ctrl->timings[channel][slotrank].lanes[lane].falling = 16; ctrl->timings[channel][slotrank].lanes[lane].rising = 16; } program_timings(ctrl, channel); FOR_ALL_POPULATED_RANKS { wait_428c(channel); /* DRAM command MRS * MR3 enable MPR * write MR3 MPR enable * in this mode only RD and RDA are allowed * all reads return a predefined pattern */ write32(DEFAULT_MCHBAR + 0x4220 + 0x400 * channel, 0x1f000); write32(DEFAULT_MCHBAR + 0x4230 + 0x400 * channel, 0xc01 | (ctrl->tMOD << 16)); write32(DEFAULT_MCHBAR + 0x4200 + 0x400 * channel, (slotrank << 24) | 0x360004); write32(DEFAULT_MCHBAR + 0x4210 + 0x400 * channel, 0); /* DRAM command RD */ write32(DEFAULT_MCHBAR + 0x4224 + 0x400 * channel, 0x1f105); write32(DEFAULT_MCHBAR + 0x4234 + 0x400 * channel, 0x4041003); write32(DEFAULT_MCHBAR + 0x4204 + 0x400 * channel, (slotrank << 24) | 0); write32(DEFAULT_MCHBAR + 0x4214 + 0x400 * channel, 0); /* DRAM command RD */ write32(DEFAULT_MCHBAR + 0x4228 + 0x400 * channel, 0x1f105); write32(DEFAULT_MCHBAR + 0x4238 + 0x400 * channel, 0x1001 | ((ctrl->CAS + 8) << 16)); write32(DEFAULT_MCHBAR + 0x4208 + 0x400 * channel, (slotrank << 24) | 0x60000); write32(DEFAULT_MCHBAR + 0x4218 + 0x400 * channel, 0); /* DRAM command MRS * MR3 disable MPR */ write32(DEFAULT_MCHBAR + 0x422c + 0x400 * channel, 0x1f000); write32(DEFAULT_MCHBAR + 0x423c + 0x400 * channel, 0xc01 | (ctrl->tMOD << 16)); write32(DEFAULT_MCHBAR + 0x420c + 0x400 * channel, (slotrank << 24) | 0x360000); write32(DEFAULT_MCHBAR + 0x421c + 0x400 * channel, 0); write32(DEFAULT_MCHBAR + 0x4284 + 0x400 * channel, 0xc0001); wait_428c(channel); } /* XXX: check any measured value ? */ FOR_ALL_POPULATED_RANKS FOR_ALL_LANES { ctrl->timings[channel][slotrank].lanes[lane].falling = 48; ctrl->timings[channel][slotrank].lanes[lane].rising = 48; } program_timings(ctrl, channel); FOR_ALL_POPULATED_RANKS { wait_428c(channel); /* DRAM command MRS * MR3 enable MPR * write MR3 MPR enable * in this mode only RD and RDA are allowed * all reads return a predefined pattern */ write32(DEFAULT_MCHBAR + 0x4220 + 0x400 * channel, 0x1f000); write32(DEFAULT_MCHBAR + 0x4230 + 0x400 * channel, 0xc01 | (ctrl->tMOD << 16)); write32(DEFAULT_MCHBAR + 0x4200 + 0x400 * channel, (slotrank << 24) | 0x360004); write32(DEFAULT_MCHBAR + 0x4210 + 0x400 * channel, 0); /* DRAM command RD */ write32(DEFAULT_MCHBAR + 0x4224 + 0x400 * channel, 0x1f105); write32(DEFAULT_MCHBAR + 0x4234 + 0x400 * channel, 0x4041003); write32(DEFAULT_MCHBAR + 0x4204 + 0x400 * channel, (slotrank << 24) | 0); write32(DEFAULT_MCHBAR + 0x4214 + 0x400 * channel, 0); /* DRAM command RD */ write32(DEFAULT_MCHBAR + 0x4228 + 0x400 * channel, 0x1f105); write32(DEFAULT_MCHBAR + 0x4238 + 0x400 * channel, 0x1001 | ((ctrl->CAS + 8) << 16)); write32(DEFAULT_MCHBAR + 0x4208 + 0x400 * channel, (slotrank << 24) | 0x60000); write32(DEFAULT_MCHBAR + 0x4218 + 0x400 * channel, 0); /* DRAM command MRS * MR3 disable MPR */ write32(DEFAULT_MCHBAR + 0x422c + 0x400 * channel, 0x1f000); write32(DEFAULT_MCHBAR + 0x423c + 0x400 * channel, 0xc01 | (ctrl->tMOD << 16)); write32(DEFAULT_MCHBAR + 0x420c + 0x400 * channel, (slotrank << 24) | 0x360000); write32(DEFAULT_MCHBAR + 0x421c + 0x400 * channel, 0); write32(DEFAULT_MCHBAR + 0x4284 + 0x400 * channel, 0xc0001); wait_428c(channel); } /* XXX: check any measured value ? */ FOR_ALL_LANES { write32(DEFAULT_MCHBAR + 0x4080 + 0x400 * channel + lane * 4, ~read32(DEFAULT_MCHBAR + 0x4040 + 0x400 * channel + lane * 4) & 0xff); } fill_pattern0(ctrl, channel, 0, 0xffffffff); write32(DEFAULT_MCHBAR + 0x4288 + (channel << 10), 0); } /* FIXME: under some conditions (older chipsets?) vendor BIOS sets both edges to the same value. */ write32(DEFAULT_MCHBAR + 0x4eb0, 0x300); printram("discover falling edges:\n[%x] = %x\n", 0x4eb0, 0x300); FOR_ALL_CHANNELS FOR_ALL_POPULATED_RANKS { err = discover_edges_real(ctrl, channel, slotrank, falling_edges[channel][slotrank]); if (err) return err; } write32(DEFAULT_MCHBAR + 0x4eb0, 0x200); printram("discover rising edges:\n[%x] = %x\n", 0x4eb0, 0x200); FOR_ALL_CHANNELS FOR_ALL_POPULATED_RANKS { err = discover_edges_real(ctrl, channel, slotrank, rising_edges[channel][slotrank]); if (err) return err; } write32(DEFAULT_MCHBAR + 0x4eb0, 0); FOR_ALL_CHANNELS FOR_ALL_POPULATED_RANKS FOR_ALL_LANES { ctrl->timings[channel][slotrank].lanes[lane].falling = falling_edges[channel][slotrank][lane]; ctrl->timings[channel][slotrank].lanes[lane].rising = rising_edges[channel][slotrank][lane]; } FOR_ALL_POPULATED_CHANNELS { program_timings(ctrl, channel); } FOR_ALL_CHANNELS FOR_ALL_POPULATED_RANKS FOR_ALL_LANES { write32(DEFAULT_MCHBAR + 0x4080 + 0x400 * channel + 4 * lane, 0); } return 0; } static int discover_edges_write_real(ramctr_timing *ctrl, int channel, int slotrank, int *edges) { int edge; u32 raw_statistics[MAX_EDGE_TIMING + 1]; int statistics[MAX_EDGE_TIMING + 1]; const int reg3000b24[] = { 0, 0xc, 0x2c }; int lane, i; int lower[NUM_LANES]; int upper[NUM_LANES]; int pat; FOR_ALL_LANES { lower[lane] = 0; upper[lane] = MAX_EDGE_TIMING; } for (i = 0; i < 3; i++) { write32(DEFAULT_MCHBAR + 0x3000 + 0x100 * channel, reg3000b24[i] << 24); printram("[%x] = 0x%08x\n", 0x3000 + 0x100 * channel, reg3000b24[i] << 24); for (pat = 0; pat < NUM_PATTERNS; pat++) { fill_pattern5(ctrl, channel, pat); write32(DEFAULT_MCHBAR + 0x4288 + 0x400 * channel, 0x1f); printram("using pattern %d\n", pat); for (edge = 0; edge <= MAX_EDGE_TIMING; edge++) { FOR_ALL_LANES { ctrl->timings[channel][slotrank].lanes[lane]. rising = edge; ctrl->timings[channel][slotrank].lanes[lane]. falling = edge; } program_timings(ctrl, channel); FOR_ALL_LANES { write32(DEFAULT_MCHBAR + 0x4340 + 0x400 * channel + 4 * lane, 0); read32(DEFAULT_MCHBAR + 0x400 * channel + 4 * lane + 0x4140); } wait_428c(channel); /* DRAM command ACT */ write32(DEFAULT_MCHBAR + 0x4220 + 0x400 * channel, 0x1f006); write32(DEFAULT_MCHBAR + 0x4230 + 0x400 * channel, 0x4 | (ctrl->tRCD << 16) | (max(ctrl->tRRD, (ctrl->tFAW >> 2) + 1) << 10)); write32(DEFAULT_MCHBAR + 0x4200 + 0x400 * channel, (slotrank << 24) | 0x60000); write32(DEFAULT_MCHBAR + 0x4210 + 0x400 * channel, 0x240); /* DRAM command WR */ write32(DEFAULT_MCHBAR + 0x4224 + 0x400 * channel, 0x1f201); write32(DEFAULT_MCHBAR + 0x4234 + 0x400 * channel, 0x8005020 | ((ctrl->tWTR + ctrl->CWL + 8) << 16)); write32(DEFAULT_MCHBAR + 0x4204 + 0x400 * channel, (slotrank << 24)); write32(DEFAULT_MCHBAR + 0x4214 + 0x400 * channel, 0x242); /* DRAM command RD */ write32(DEFAULT_MCHBAR + 0x4228 + 0x400 * channel, 0x1f105); write32(DEFAULT_MCHBAR + 0x4238 + 0x400 * channel, 0x4005020 | (max(ctrl->tRTP, 8) << 16)); write32(DEFAULT_MCHBAR + 0x4208 + 0x400 * channel, (slotrank << 24)); write32(DEFAULT_MCHBAR + 0x4218 + 0x400 * channel, 0x242); /* DRAM command PRE */ write32(DEFAULT_MCHBAR + 0x422c + 0x400 * channel, 0x1f002); write32(DEFAULT_MCHBAR + 0x423c + 0x400 * channel, 0xc01 | (ctrl->tRP << 16)); write32(DEFAULT_MCHBAR + 0x420c + 0x400 * channel, (slotrank << 24) | 0x60400); write32(DEFAULT_MCHBAR + 0x421c + 0x400 * channel, 0); write32(DEFAULT_MCHBAR + 0x4284 + 0x400 * channel, 0xc0001); wait_428c(channel); FOR_ALL_LANES { read32(DEFAULT_MCHBAR + 0x4340 + 0x400 * channel + lane * 4); } raw_statistics[edge] = MCHBAR32(0x436c + 0x400 * channel); } FOR_ALL_LANES { struct run rn; for (edge = 0; edge <= MAX_EDGE_TIMING; edge++) statistics[edge] = ! !(raw_statistics[edge] & (1 << lane)); rn = get_longest_zero_run(statistics, MAX_EDGE_TIMING + 1); printram("edges: %d, %d, %d: 0x%02x-0x%02x-0x%02x, 0x%02x-0x%02x\n", channel, slotrank, i, rn.start, rn.middle, rn.end, rn.start + ctrl->edge_offset[i], rn.end - ctrl->edge_offset[i]); lower[lane] = max(rn.start + ctrl->edge_offset[i], lower[lane]); upper[lane] = min(rn.end - ctrl->edge_offset[i], upper[lane]); edges[lane] = (lower[lane] + upper[lane]) / 2; if (rn.all || (lower[lane] > upper[lane])) { printk(BIOS_EMERG, "edge write discovery failed: %d, %d, %d\n", channel, slotrank, lane); return MAKE_ERR; } } } } write32(DEFAULT_MCHBAR + 0x3000, 0); printram("CPA\n"); return 0; } int discover_edges_write(ramctr_timing *ctrl) { int falling_edges[NUM_CHANNELS][NUM_SLOTRANKS][NUM_LANES]; int rising_edges[NUM_CHANNELS][NUM_SLOTRANKS][NUM_LANES]; int channel, slotrank, lane; int err; /* FIXME: under some conditions (older chipsets?) vendor BIOS sets both edges to the same value. */ write32(DEFAULT_MCHBAR + 0x4eb0, 0x300); printram("discover falling edges write:\n[%x] = %x\n", 0x4eb0, 0x300); FOR_ALL_CHANNELS FOR_ALL_POPULATED_RANKS { err = discover_edges_write_real(ctrl, channel, slotrank, falling_edges[channel][slotrank]); if (err) return err; } write32(DEFAULT_MCHBAR + 0x4eb0, 0x200); printram("discover rising edges write:\n[%x] = %x\n", 0x4eb0, 0x200); FOR_ALL_CHANNELS FOR_ALL_POPULATED_RANKS { err = discover_edges_write_real(ctrl, channel, slotrank, rising_edges[channel][slotrank]); if (err) return err; } write32(DEFAULT_MCHBAR + 0x4eb0, 0); FOR_ALL_CHANNELS FOR_ALL_POPULATED_RANKS FOR_ALL_LANES { ctrl->timings[channel][slotrank].lanes[lane].falling = falling_edges[channel][slotrank][lane]; ctrl->timings[channel][slotrank].lanes[lane].rising = rising_edges[channel][slotrank][lane]; } FOR_ALL_POPULATED_CHANNELS program_timings(ctrl, channel); FOR_ALL_CHANNELS FOR_ALL_POPULATED_RANKS FOR_ALL_LANES { write32(DEFAULT_MCHBAR + 0x4080 + 0x400 * channel + 4 * lane, 0); } return 0; } static void test_timC_write(ramctr_timing *ctrl, int channel, int slotrank) { wait_428c(channel); /* DRAM command ACT */ write32(DEFAULT_MCHBAR + 0x4220 + 0x400 * channel, 0x1f006); write32(DEFAULT_MCHBAR + 0x4230 + 0x400 * channel, (max((ctrl->tFAW >> 2) + 1, ctrl->tRRD) << 10) | (ctrl->tRCD << 16) | 4); write32(DEFAULT_MCHBAR + 0x4200 + 0x400 * channel, (slotrank << 24) | 0x60000); write32(DEFAULT_MCHBAR + 0x4210 + 0x400 * channel, 0x244); /* DRAM command WR */ write32(DEFAULT_MCHBAR + 0x4224 + 0x400 * channel, 0x1f201); write32(DEFAULT_MCHBAR + 0x4234 + 0x400 * channel, 0x80011e0 | ((ctrl->tWTR + ctrl->CWL + 8) << 16)); write32(DEFAULT_MCHBAR + 0x4204 + 0x400 * channel, (slotrank << 24)); write32(DEFAULT_MCHBAR + 0x4214 + 0x400 * channel, 0x242); /* DRAM command RD */ write32(DEFAULT_MCHBAR + 0x4228 + 0x400 * channel, 0x1f105); write32(DEFAULT_MCHBAR + 0x4238 + 0x400 * channel, 0x40011e0 | (max(ctrl->tRTP, 8) << 16)); write32(DEFAULT_MCHBAR + 0x4208 + 0x400 * channel, (slotrank << 24)); write32(DEFAULT_MCHBAR + 0x4218 + 0x400 * channel, 0x242); /* DRAM command PRE */ write32(DEFAULT_MCHBAR + 0x422c + 0x400 * channel, 0x1f002); write32(DEFAULT_MCHBAR + 0x423c + 0x400 * channel, 0x1001 | (ctrl->tRP << 16)); write32(DEFAULT_MCHBAR + 0x420c + 0x400 * channel, (slotrank << 24) | 0x60400); write32(DEFAULT_MCHBAR + 0x421c + 0x400 * channel, 0); write32(DEFAULT_MCHBAR + 0x4284 + 0x400 * channel, 0xc0001); wait_428c(channel); } int discover_timC_write(ramctr_timing *ctrl) { const u8 rege3c_b24[3] = { 0, 0xf, 0x2f }; int i, pat; int lower[NUM_CHANNELS][NUM_SLOTRANKS][NUM_LANES]; int upper[NUM_CHANNELS][NUM_SLOTRANKS][NUM_LANES]; int channel, slotrank, lane; FOR_ALL_CHANNELS FOR_ALL_POPULATED_RANKS FOR_ALL_LANES { lower[channel][slotrank][lane] = 0; upper[channel][slotrank][lane] = MAX_TIMC; } write32(DEFAULT_MCHBAR + 0x4ea8, 1); printram("discover timC write:\n"); for (i = 0; i < 3; i++) FOR_ALL_POPULATED_CHANNELS { write32(DEFAULT_MCHBAR + 0xe3c + (channel * 0x100), (rege3c_b24[i] << 24) | (read32(DEFAULT_MCHBAR + 0xe3c + (channel * 0x100)) & ~0x3f000000)); udelay(2); for (pat = 0; pat < NUM_PATTERNS; pat++) { FOR_ALL_POPULATED_RANKS { int timC; u32 raw_statistics[MAX_TIMC + 1]; int statistics[MAX_TIMC + 1]; /* Make sure rn.start < rn.end */ statistics[MAX_TIMC] = 1; fill_pattern5(ctrl, channel, pat); write32(DEFAULT_MCHBAR + 0x4288 + 0x400 * channel, 0x1f); for (timC = 0; timC < MAX_TIMC; timC++) { FOR_ALL_LANES ctrl->timings[channel][slotrank].lanes[lane].timC = timC; program_timings(ctrl, channel); test_timC_write (ctrl, channel, slotrank); raw_statistics[timC] = MCHBAR32(0x436c + 0x400 * channel); } FOR_ALL_LANES { struct run rn; for (timC = 0; timC < MAX_TIMC; timC++) statistics[timC] = !!(raw_statistics[timC] & (1 << lane)); rn = get_longest_zero_run(statistics, MAX_TIMC + 1); if (rn.all) { printk(BIOS_EMERG, "timC write discovery failed: %d, %d, %d\n", channel, slotrank, lane); return MAKE_ERR; } printram("timC: %d, %d, %d: 0x%02x-0x%02x-0x%02x, 0x%02x-0x%02x\n", channel, slotrank, i, rn.start, rn.middle, rn.end, rn.start + ctrl->timC_offset[i], rn.end - ctrl->timC_offset[i]); lower[channel][slotrank][lane] = max(rn.start + ctrl->timC_offset[i], lower[channel][slotrank][lane]); upper[channel][slotrank][lane] = min(rn.end - ctrl->timC_offset[i], upper[channel][slotrank][lane]); } } } } FOR_ALL_CHANNELS { write32(DEFAULT_MCHBAR + (channel * 0x100) + 0xe3c, 0 | (read32(DEFAULT_MCHBAR + (channel * 0x100) + 0xe3c) & ~0x3f000000)); udelay(2); } write32(DEFAULT_MCHBAR + 0x4ea8, 0); printram("CPB\n"); FOR_ALL_CHANNELS FOR_ALL_POPULATED_RANKS FOR_ALL_LANES { printram("timC %d, %d, %d: %x\n", channel, slotrank, lane, (lower[channel][slotrank][lane] + upper[channel][slotrank][lane]) / 2); ctrl->timings[channel][slotrank].lanes[lane].timC = (lower[channel][slotrank][lane] + upper[channel][slotrank][lane]) / 2; } FOR_ALL_POPULATED_CHANNELS { program_timings(ctrl, channel); } return 0; } void normalize_training(ramctr_timing * ctrl) { int channel, slotrank, lane; int mat; FOR_ALL_CHANNELS FOR_ALL_POPULATED_RANKS { int delta; mat = 0; FOR_ALL_LANES mat = max(ctrl->timings[channel][slotrank].lanes[lane].timA, mat); printram("normalize %d, %d, %d: mat %d\n", channel, slotrank, lane, mat); delta = (mat >> 6) - ctrl->timings[channel][slotrank].val_4028; printram("normalize %d, %d, %d: delta %d\n", channel, slotrank, lane, delta); ctrl->timings[channel][slotrank].val_4024 += delta; ctrl->timings[channel][slotrank].val_4028 += delta; } FOR_ALL_POPULATED_CHANNELS { program_timings(ctrl, channel); } } void write_controller_mr(ramctr_timing * ctrl) { int channel, slotrank; FOR_ALL_CHANNELS FOR_ALL_POPULATED_RANKS { write32(DEFAULT_MCHBAR + 0x0004 + (channel << 8) + lane_registers[slotrank], make_mr0(ctrl, slotrank)); write32(DEFAULT_MCHBAR + 0x0008 + (channel << 8) + lane_registers[slotrank], make_mr1(ctrl, slotrank, channel)); } } int channel_test(ramctr_timing *ctrl) { int channel, slotrank, lane; slotrank = 0; FOR_ALL_POPULATED_CHANNELS if (read32(DEFAULT_MCHBAR + 0x42a0 + (channel << 10)) & 0xa000) { printk(BIOS_EMERG, "Mini channel test failed (1): %d\n", channel); return MAKE_ERR; } FOR_ALL_POPULATED_CHANNELS { fill_pattern0(ctrl, channel, 0x12345678, 0x98765432); write32(DEFAULT_MCHBAR + 0x4288 + (channel << 10), 0); } for (slotrank = 0; slotrank < 4; slotrank++) FOR_ALL_CHANNELS if (ctrl->rankmap[channel] & (1 << slotrank)) { FOR_ALL_LANES { write32(DEFAULT_MCHBAR + (0x4f40 + 4 * lane), 0); write32(DEFAULT_MCHBAR + (0x4d40 + 4 * lane), 0); } wait_428c(channel); /* DRAM command ACT */ write32(DEFAULT_MCHBAR + 0x4220 + (channel << 10), 0x0001f006); write32(DEFAULT_MCHBAR + 0x4230 + (channel << 10), 0x0028a004); write32(DEFAULT_MCHBAR + 0x4200 + (channel << 10), 0x00060000 | (slotrank << 24)); write32(DEFAULT_MCHBAR + 0x4210 + (channel << 10), 0x00000244); /* DRAM command WR */ write32(DEFAULT_MCHBAR + 0x4224 + (channel << 10), 0x0001f201); write32(DEFAULT_MCHBAR + 0x4234 + (channel << 10), 0x08281064); write32(DEFAULT_MCHBAR + 0x4204 + (channel << 10), 0x00000000 | (slotrank << 24)); write32(DEFAULT_MCHBAR + 0x4214 + (channel << 10), 0x00000242); /* DRAM command RD */ write32(DEFAULT_MCHBAR + 0x4228 + (channel << 10), 0x0001f105); write32(DEFAULT_MCHBAR + 0x4238 + (channel << 10), 0x04281064); write32(DEFAULT_MCHBAR + 0x4208 + (channel << 10), 0x00000000 | (slotrank << 24)); write32(DEFAULT_MCHBAR + 0x4218 + (channel << 10), 0x00000242); /* DRAM command PRE */ write32(DEFAULT_MCHBAR + 0x422c + (channel << 10), 0x0001f002); write32(DEFAULT_MCHBAR + 0x423c + (channel << 10), 0x00280c01); write32(DEFAULT_MCHBAR + 0x420c + (channel << 10), 0x00060400 | (slotrank << 24)); write32(DEFAULT_MCHBAR + 0x421c + (channel << 10), 0x00000240); write32(DEFAULT_MCHBAR + 0x4284 + (channel << 10), 0x000c0001); wait_428c(channel); FOR_ALL_LANES if (read32(DEFAULT_MCHBAR + 0x4340 + (channel << 10) + 4 * lane)) { printk(BIOS_EMERG, "Mini channel test failed (2): %d, %d, %d\n", channel, slotrank, lane); return MAKE_ERR; } } return 0; } void set_scrambling_seed(ramctr_timing * ctrl) { int channel; /* FIXME: we hardcode seeds. Do we need to use some PRNG for them? I don't think so. */ static u32 seeds[NUM_CHANNELS][3] = { {0x00009a36, 0xbafcfdcf, 0x46d1ab68}, {0x00028bfa, 0x53fe4b49, 0x19ed5483} }; FOR_ALL_POPULATED_CHANNELS { MCHBAR32(0x4020 + 0x400 * channel) &= ~0x10000000; MCHBAR32(0x4034 + 0x400 * channel) = seeds[channel][0]; MCHBAR32(0x403c + 0x400 * channel) = seeds[channel][1]; MCHBAR32(0x4038 + 0x400 * channel) = seeds[channel][2]; } } void set_4f8c(void) { struct cpuid_result cpures; u32 cpu; cpures = cpuid(1); cpu = (cpures.eax); if (IS_SANDY_CPU(cpu) && (IS_SANDY_CPU_D0(cpu) || IS_SANDY_CPU_D1(cpu))) { MCHBAR32(0x4f8c) = 0x141D1519; } else { MCHBAR32(0x4f8c) = 0x551D1519; } } void prepare_training(ramctr_timing * ctrl) { int channel; FOR_ALL_POPULATED_CHANNELS { // Always drive command bus MCHBAR32(0x4004 + 0x400 * channel) |= 0x20000000; } udelay(1); FOR_ALL_POPULATED_CHANNELS { wait_428c(channel); } } void set_4008c(ramctr_timing * ctrl) { int channel, slotrank; FOR_ALL_POPULATED_CHANNELS { u32 b20, b4_8_12; int min_320c = 10000; int max_320c = -10000; FOR_ALL_POPULATED_RANKS { max_320c = max(ctrl->timings[channel][slotrank].val_320c, max_320c); min_320c = min(ctrl->timings[channel][slotrank].val_320c, min_320c); } if (max_320c - min_320c > 51) b20 = 0; else b20 = ctrl->ref_card_offset[channel]; if (ctrl->reg_320c_range_threshold < max_320c - min_320c) b4_8_12 = 0x3330; else b4_8_12 = 0x2220; dram_odt_stretch(ctrl, channel); write32(DEFAULT_MCHBAR + 0x4008 + (channel << 10), 0x0a000000 | (b20 << 20) | ((ctrl->ref_card_offset[channel] + 2) << 16) | b4_8_12); } } void set_42a0(ramctr_timing * ctrl) { int channel; FOR_ALL_POPULATED_CHANNELS { write32(DEFAULT_MCHBAR + (0x42a0 + 0x400 * channel), 0x00001000 | ctrl->rankmap[channel]); MCHBAR32(0x4004 + 0x400 * channel) &= ~0x20000000; // OK } } static int encode_5d10(int ns) { return (ns + 499) / 500; } /* FIXME: values in this function should be hardware revision-dependent. */ void final_registers(ramctr_timing * ctrl) { int channel; int t1_cycles = 0, t1_ns = 0, t2_ns; int t3_ns; u32 r32; write32(DEFAULT_MCHBAR + 0x4cd4, 0x00000046); write32(DEFAULT_MCHBAR + 0x400c, (read32(DEFAULT_MCHBAR + 0x400c) & 0xFFFFCFFF) | 0x1000); // OK write32(DEFAULT_MCHBAR + 0x440c, (read32(DEFAULT_MCHBAR + 0x440c) & 0xFFFFCFFF) | 0x1000); // OK write32(DEFAULT_MCHBAR + 0x4cb0, 0x00000740); write32(DEFAULT_MCHBAR + 0x4380, 0x00000aaa); // OK write32(DEFAULT_MCHBAR + 0x4780, 0x00000aaa); // OK write32(DEFAULT_MCHBAR + 0x4f88, 0x5f7003ff); // OK write32(DEFAULT_MCHBAR + 0x5064, 0x00073000 | ctrl->reg_5064b0); // OK FOR_ALL_CHANNELS { switch (ctrl->rankmap[channel]) { /* Unpopulated channel. */ case 0: write32(DEFAULT_MCHBAR + 0x4384 + channel * 0x400, 0); break; /* Only single-ranked dimms. */ case 1: case 4: case 5: write32(DEFAULT_MCHBAR + 0x4384 + channel * 0x400, 0x373131); break; /* Dual-ranked dimms present. */ default: write32(DEFAULT_MCHBAR + 0x4384 + channel * 0x400, 0x9b6ea1); break; } } write32 (DEFAULT_MCHBAR + 0x5880, 0xca9171e5); write32 (DEFAULT_MCHBAR + 0x5888, (read32 (DEFAULT_MCHBAR + 0x5888) & ~0xffffff) | 0xe4d5d0); write32 (DEFAULT_MCHBAR + 0x58a8, read32 (DEFAULT_MCHBAR + 0x58a8) & ~0x1f); write32 (DEFAULT_MCHBAR + 0x4294, (read32 (DEFAULT_MCHBAR + 0x4294) & ~0x30000) | (1 << 16)); write32 (DEFAULT_MCHBAR + 0x4694, (read32 (DEFAULT_MCHBAR + 0x4694) & ~0x30000) | (1 << 16)); MCHBAR32(0x5030) |= 1; // OK MCHBAR32(0x5030) |= 0x80; // OK MCHBAR32(0x5f18) = 0xfa; // OK /* Find a populated channel. */ FOR_ALL_POPULATED_CHANNELS break; t1_cycles = ((read32(DEFAULT_MCHBAR + 0x4290 + channel * 0x400) >> 8) & 0xff); r32 = read32(DEFAULT_MCHBAR + 0x5064); if (r32 & 0x20000) t1_cycles += (r32 & 0xfff); t1_cycles += (read32(DEFAULT_MCHBAR + channel * 0x400 + 0x42a4) & 0xfff); t1_ns = t1_cycles * ctrl->tCK / 256 + 544; if (!(r32 & 0x20000)) t1_ns += 500; t2_ns = 10 * ((read32(DEFAULT_MCHBAR + 0x5f10) >> 8) & 0xfff); if ( read32(DEFAULT_MCHBAR + 0x5f00) & 8 ) { t3_ns = 10 * ((read32(DEFAULT_MCHBAR + 0x5f20) >> 8) & 0xfff); t3_ns += 10 * (read32(DEFAULT_MCHBAR + 0x5f18) & 0xff); } else { t3_ns = 500; } printk(BIOS_DEBUG, "t123: %d, %d, %d\n", t1_ns, t2_ns, t3_ns); write32 (DEFAULT_MCHBAR + 0x5d10, ((encode_5d10(t1_ns) + encode_5d10(t2_ns)) << 16) | (encode_5d10(t1_ns) << 8) | ((encode_5d10(t3_ns) + encode_5d10(t2_ns) + encode_5d10(t1_ns)) << 24) | (read32(DEFAULT_MCHBAR + 0x5d10) & 0xC0C0C0C0) | 0xc); } void restore_timings(ramctr_timing * ctrl) { int channel, slotrank, lane; FOR_ALL_POPULATED_CHANNELS MCHBAR32(0x4004 + 0x400 * channel) = ctrl->tRRD | (ctrl->tRTP << 4) | (ctrl->tCKE << 8) | (ctrl->tWTR << 12) | (ctrl->tFAW << 16) | (ctrl->tWR << 24) | (ctrl->cmd_stretch[channel] << 30); udelay(1); FOR_ALL_POPULATED_CHANNELS { wait_428c(channel); } FOR_ALL_CHANNELS FOR_ALL_POPULATED_RANKS FOR_ALL_LANES { write32(DEFAULT_MCHBAR + 0x4080 + 0x400 * channel + 4 * lane, 0); } FOR_ALL_POPULATED_CHANNELS write32(DEFAULT_MCHBAR + 0x4008 + 0x400 * channel, read32(DEFAULT_MCHBAR + 0x4008 + 0x400 * channel) | 0x8000000); FOR_ALL_POPULATED_CHANNELS { udelay (1); write32(DEFAULT_MCHBAR + 0x4020 + 0x400 * channel, read32(DEFAULT_MCHBAR + 0x4020 + 0x400 * channel) | 0x200000); } printram("CPE\n"); write32(DEFAULT_MCHBAR + 0x3400, 0); write32(DEFAULT_MCHBAR + 0x4eb0, 0); printram("CP5b\n"); FOR_ALL_POPULATED_CHANNELS { program_timings(ctrl, channel); } u32 reg, addr; while (!(MCHBAR32(0x5084) & 0x10000)); do { reg = MCHBAR32(0x428c); } while ((reg & 0x14) == 0); // Set state of memory controller MCHBAR32(0x5030) = 0x116; MCHBAR32(0x4ea0) = 0; // Wait 500us udelay(500); FOR_ALL_CHANNELS { // Set valid rank CKE reg = 0; reg = (reg & ~0xf) | ctrl->rankmap[channel]; addr = 0x400 * channel + 0x42a0; MCHBAR32(addr) = reg; // Wait 10ns for ranks to settle //udelay(0.01); reg = (reg & ~0xf0) | (ctrl->rankmap[channel] << 4); MCHBAR32(addr) = reg; // Write reset using a NOP write_reset(ctrl); } /* mrs commands. */ dram_mrscommands(ctrl); printram("CP5c\n"); write32(DEFAULT_MCHBAR + 0x3000, 0); FOR_ALL_CHANNELS { write32(DEFAULT_MCHBAR + (channel * 0x100) + 0xe3c, 0 | (read32(DEFAULT_MCHBAR + (channel * 0x100) + 0xe3c) & ~0x3f000000)); udelay(2); } write32(DEFAULT_MCHBAR + 0x4ea8, 0); }