// SPDX-License-Identifier: GPL-2.0+ /* * (C) Copyright 2006-2007 Freescale Semiconductor, Inc. * * (C) Copyright 2006 * Wolfgang Denk, DENX Software Engineering, wd@denx.de. * * Copyright (C) 2004-2006 Freescale Semiconductor, Inc. * (C) Copyright 2003 Motorola Inc. * Xianghua Xiao (X.Xiao@motorola.com) */ #ifndef CONFIG_MPC83XX_SDRAM #include #include #include #include #include #include #include #include #include #include #include #include #include #include DECLARE_GLOBAL_DATA_PTR; void board_add_ram_info(int use_default) { volatile immap_t *immap = (immap_t *) CONFIG_SYS_IMMR; volatile ddr83xx_t *ddr = &immap->ddr; char buf[32]; printf(" (DDR%d", ((ddr->sdram_cfg & SDRAM_CFG_SDRAM_TYPE_MASK) >> SDRAM_CFG_SDRAM_TYPE_SHIFT) - 1); #if defined(CONFIG_ARCH_MPC8308) || defined(CONFIG_ARCH_MPC831X) if ((ddr->sdram_cfg & SDRAM_CFG_DBW_MASK) == SDRAM_CFG_DBW_16) puts(", 16-bit"); else if ((ddr->sdram_cfg & SDRAM_CFG_DBW_MASK) == SDRAM_CFG_DBW_32) puts(", 32-bit"); else puts(", unknown width"); #else if (ddr->sdram_cfg & SDRAM_CFG_32_BE) puts(", 32-bit"); else puts(", 64-bit"); #endif if (ddr->sdram_cfg & SDRAM_CFG_ECC_EN) puts(", ECC on"); else puts(", ECC off"); printf(", %s MHz)", strmhz(buf, gd->mem_clk)); #if defined(CONFIG_SYS_LB_SDRAM) && defined(CFG_SYS_LBC_SDRAM_SIZE) puts("\nSDRAM: "); print_size (CFG_SYS_LBC_SDRAM_SIZE * 1024 * 1024, " (local bus)"); #endif } #ifdef CONFIG_SPD_EEPROM #ifndef CONFIG_SYS_READ_SPD #define CONFIG_SYS_READ_SPD i2c_read #endif #ifndef SPD_EEPROM_OFFSET #define SPD_EEPROM_OFFSET 0 #endif #ifndef SPD_EEPROM_ADDR_LEN #define SPD_EEPROM_ADDR_LEN 1 #endif /* * Convert picoseconds into clock cycles (rounding up if needed). */ int picos_to_clk(int picos) { unsigned int mem_bus_clk; int clks; mem_bus_clk = gd->mem_clk >> 1; clks = picos / (1000000000 / (mem_bus_clk / 1000)); if (picos % (1000000000 / (mem_bus_clk / 1000)) != 0) clks++; return clks; } unsigned int banksize(unsigned char row_dens) { return ((row_dens >> 2) | ((row_dens & 3) << 6)) << 24; } int read_spd(uint addr) { return ((int) addr); } #undef SPD_DEBUG #ifdef SPD_DEBUG static void spd_debug(spd_eeprom_t *spd) { printf ("\nDIMM type: %-18.18s\n", spd->mpart); printf ("SPD size: %d\n", spd->info_size); printf ("EEPROM size: %d\n", 1 << spd->chip_size); printf ("Memory type: %d\n", spd->mem_type); printf ("Row addr: %d\n", spd->nrow_addr); printf ("Column addr: %d\n", spd->ncol_addr); printf ("# of rows: %d\n", spd->nrows); printf ("Row density: %d\n", spd->row_dens); printf ("# of banks: %d\n", spd->nbanks); printf ("Data width: %d\n", 256 * spd->dataw_msb + spd->dataw_lsb); printf ("Chip width: %d\n", spd->primw); printf ("Refresh rate: %02X\n", spd->refresh); printf ("CAS latencies: %02X\n", spd->cas_lat); printf ("Write latencies: %02X\n", spd->write_lat); printf ("tRP: %d\n", spd->trp); printf ("tRCD: %d\n", spd->trcd); printf ("\n"); } #endif /* SPD_DEBUG */ long int spd_sdram() { volatile immap_t *immap = (immap_t *)CONFIG_SYS_IMMR; volatile ddr83xx_t *ddr = &immap->ddr; volatile law83xx_t *ecm = &immap->sysconf.ddrlaw[0]; spd_eeprom_t spd; unsigned int n_ranks; unsigned int odt_rd_cfg, odt_wr_cfg; unsigned char twr_clk, twtr_clk; unsigned int sdram_type; unsigned int memsize; unsigned int law_size; unsigned char caslat, caslat_ctrl; unsigned int trfc, trfc_clk, trfc_low; unsigned int trcd_clk, trtp_clk; unsigned char cke_min_clk; unsigned char add_lat, wr_lat; unsigned char wr_data_delay; unsigned char four_act; unsigned char cpo; unsigned char burstlen; unsigned char odt_cfg, mode_odt_enable; unsigned int max_bus_clk; unsigned int max_data_rate, effective_data_rate; unsigned int ddrc_clk; unsigned int refresh_clk; unsigned int sdram_cfg; unsigned int ddrc_ecc_enable; unsigned int pvr = get_pvr(); /* * First disable the memory controller (could be enabled * by the debugger) */ clrsetbits_be32(&ddr->sdram_cfg, SDRAM_CFG_MEM_EN, 0); sync(); isync(); /* Read SPD parameters with I2C */ CONFIG_SYS_READ_SPD(SPD_EEPROM_ADDRESS, SPD_EEPROM_OFFSET, SPD_EEPROM_ADDR_LEN, (uchar *) &spd, sizeof(spd)); #ifdef SPD_DEBUG spd_debug(&spd); #endif /* Check the memory type */ if (spd.mem_type != SPD_MEMTYPE_DDR && spd.mem_type != SPD_MEMTYPE_DDR2) { debug("DDR: Module mem type is %02X\n", spd.mem_type); return 0; } /* Check the number of physical bank */ if (spd.mem_type == SPD_MEMTYPE_DDR) { n_ranks = spd.nrows; } else { n_ranks = (spd.nrows & 0x7) + 1; } if (n_ranks > 2) { printf("DDR: The number of physical bank is %02X\n", n_ranks); return 0; } /* Check if the number of row of the module is in the range of DDRC */ if (spd.nrow_addr < 12 || spd.nrow_addr > 15) { printf("DDR: Row number is out of range of DDRC, row=%02X\n", spd.nrow_addr); return 0; } /* Check if the number of col of the module is in the range of DDRC */ if (spd.ncol_addr < 8 || spd.ncol_addr > 11) { printf("DDR: Col number is out of range of DDRC, col=%02X\n", spd.ncol_addr); return 0; } #ifdef CFG_SYS_DDRCDR_VALUE /* * Adjust DDR II IO voltage biasing. It just makes it work. */ if(spd.mem_type == SPD_MEMTYPE_DDR2) { immap->sysconf.ddrcdr = CFG_SYS_DDRCDR_VALUE; } udelay(50000); #endif /* * ODT configuration recommendation from DDR Controller Chapter. */ odt_rd_cfg = 0; /* Never assert ODT */ odt_wr_cfg = 0; /* Never assert ODT */ if (spd.mem_type == SPD_MEMTYPE_DDR2) { odt_wr_cfg = 1; /* Assert ODT on writes to CSn */ } /* Setup DDR chip select register */ #ifdef CONFIG_SYS_83XX_DDR_USES_CS0 ddr->csbnds[0].csbnds = (banksize(spd.row_dens) >> 24) - 1; ddr->cs_config[0] = ( 1 << 31 | (odt_rd_cfg << 20) | (odt_wr_cfg << 16) | ((spd.nbanks == 8 ? 1 : 0) << 14) | ((spd.nrow_addr - 12) << 8) | (spd.ncol_addr - 8) ); debug("\n"); debug("cs0_bnds = 0x%08x\n",ddr->csbnds[0].csbnds); debug("cs0_config = 0x%08x\n",ddr->cs_config[0]); if (n_ranks == 2) { ddr->csbnds[1].csbnds = ( (banksize(spd.row_dens) >> 8) | ((banksize(spd.row_dens) >> 23) - 1) ); ddr->cs_config[1] = ( 1<<31 | (odt_rd_cfg << 20) | (odt_wr_cfg << 16) | ((spd.nbanks == 8 ? 1 : 0) << 14) | ((spd.nrow_addr - 12) << 8) | (spd.ncol_addr - 8) ); debug("cs1_bnds = 0x%08x\n",ddr->csbnds[1].csbnds); debug("cs1_config = 0x%08x\n",ddr->cs_config[1]); } #else ddr->csbnds[2].csbnds = (banksize(spd.row_dens) >> 24) - 1; ddr->cs_config[2] = ( 1 << 31 | (odt_rd_cfg << 20) | (odt_wr_cfg << 16) | ((spd.nbanks == 8 ? 1 : 0) << 14) | ((spd.nrow_addr - 12) << 8) | (spd.ncol_addr - 8) ); debug("\n"); debug("cs2_bnds = 0x%08x\n",ddr->csbnds[2].csbnds); debug("cs2_config = 0x%08x\n",ddr->cs_config[2]); if (n_ranks == 2) { ddr->csbnds[3].csbnds = ( (banksize(spd.row_dens) >> 8) | ((banksize(spd.row_dens) >> 23) - 1) ); ddr->cs_config[3] = ( 1<<31 | (odt_rd_cfg << 20) | (odt_wr_cfg << 16) | ((spd.nbanks == 8 ? 1 : 0) << 14) | ((spd.nrow_addr - 12) << 8) | (spd.ncol_addr - 8) ); debug("cs3_bnds = 0x%08x\n",ddr->csbnds[3].csbnds); debug("cs3_config = 0x%08x\n",ddr->cs_config[3]); } #endif /* * Figure out memory size in Megabytes. */ memsize = n_ranks * banksize(spd.row_dens) / 0x100000; /* * First supported LAW size is 16M, at LAWAR_SIZE_16M == 23. */ law_size = 19 + __ilog2(memsize); /* * Set up LAWBAR for all of DDR. */ ecm->bar = CFG_SYS_SDRAM_BASE & 0xfffff000; ecm->ar = (LAWAR_EN | LAWAR_TRGT_IF_DDR | (LAWAR_SIZE & law_size)); debug("DDR:bar=0x%08x\n", ecm->bar); debug("DDR:ar=0x%08x\n", ecm->ar); /* * Find the largest CAS by locating the highest 1 bit * in the spd.cas_lat field. Translate it to a DDR * controller field value: * * CAS Lat DDR I DDR II Ctrl * Clocks SPD Bit SPD Bit Value * ------- ------- ------- ----- * 1.0 0 0001 * 1.5 1 0010 * 2.0 2 2 0011 * 2.5 3 0100 * 3.0 4 3 0101 * 3.5 5 0110 * 4.0 6 4 0111 * 4.5 1000 * 5.0 5 1001 */ caslat = __ilog2(spd.cas_lat); if ((spd.mem_type == SPD_MEMTYPE_DDR) && (caslat > 6)) { printf("DDR I: Invalid SPD CAS Latency: 0x%x.\n", spd.cas_lat); return 0; } else if (spd.mem_type == SPD_MEMTYPE_DDR2 && (caslat < 2 || caslat > 5)) { printf("DDR II: Invalid SPD CAS Latency: 0x%x.\n", spd.cas_lat); return 0; } debug("DDR: caslat SPD bit is %d\n", caslat); max_bus_clk = 1000 *10 / (((spd.clk_cycle & 0xF0) >> 4) * 10 + (spd.clk_cycle & 0x0f)); max_data_rate = max_bus_clk * 2; debug("DDR:Module maximum data rate is: %d MHz\n", max_data_rate); ddrc_clk = gd->mem_clk / 1000000; effective_data_rate = 0; if (max_data_rate >= 460) { /* it is DDR2-800, 667, 533 */ if (spd.cas_lat & 0x08) caslat = 3; else caslat = 4; if (ddrc_clk <= 460 && ddrc_clk > 350) effective_data_rate = 400; else if (ddrc_clk <=350 && ddrc_clk > 280) effective_data_rate = 333; else if (ddrc_clk <= 280 && ddrc_clk > 230) effective_data_rate = 266; else effective_data_rate = 200; } else if (max_data_rate >= 390 && max_data_rate < 460) { /* it is DDR 400 */ if (ddrc_clk <= 460 && ddrc_clk > 350) { /* DDR controller clk at 350~460 */ effective_data_rate = 400; /* 5ns */ caslat = caslat; } else if (ddrc_clk <= 350 && ddrc_clk > 280) { /* DDR controller clk at 280~350 */ effective_data_rate = 333; /* 6ns */ if (spd.clk_cycle2 == 0x60) caslat = caslat - 1; else caslat = caslat; } else if (ddrc_clk <= 280 && ddrc_clk > 230) { /* DDR controller clk at 230~280 */ effective_data_rate = 266; /* 7.5ns */ if (spd.clk_cycle3 == 0x75) caslat = caslat - 2; else if (spd.clk_cycle2 == 0x75) caslat = caslat - 1; else caslat = caslat; } else if (ddrc_clk <= 230 && ddrc_clk > 90) { /* DDR controller clk at 90~230 */ effective_data_rate = 200; /* 10ns */ if (spd.clk_cycle3 == 0xa0) caslat = caslat - 2; else if (spd.clk_cycle2 == 0xa0) caslat = caslat - 1; else caslat = caslat; } } else if (max_data_rate >= 323) { /* it is DDR 333 */ if (ddrc_clk <= 350 && ddrc_clk > 280) { /* DDR controller clk at 280~350 */ effective_data_rate = 333; /* 6ns */ caslat = caslat; } else if (ddrc_clk <= 280 && ddrc_clk > 230) { /* DDR controller clk at 230~280 */ effective_data_rate = 266; /* 7.5ns */ if (spd.clk_cycle2 == 0x75) caslat = caslat - 1; else caslat = caslat; } else if (ddrc_clk <= 230 && ddrc_clk > 90) { /* DDR controller clk at 90~230 */ effective_data_rate = 200; /* 10ns */ if (spd.clk_cycle3 == 0xa0) caslat = caslat - 2; else if (spd.clk_cycle2 == 0xa0) caslat = caslat - 1; else caslat = caslat; } } else if (max_data_rate >= 256) { /* it is DDR 266 */ if (ddrc_clk <= 350 && ddrc_clk > 280) { /* DDR controller clk at 280~350 */ printf("DDR: DDR controller freq is more than " "max data rate of the module\n"); return 0; } else if (ddrc_clk <= 280 && ddrc_clk > 230) { /* DDR controller clk at 230~280 */ effective_data_rate = 266; /* 7.5ns */ caslat = caslat; } else if (ddrc_clk <= 230 && ddrc_clk > 90) { /* DDR controller clk at 90~230 */ effective_data_rate = 200; /* 10ns */ if (spd.clk_cycle2 == 0xa0) caslat = caslat - 1; } } else if (max_data_rate >= 190) { /* it is DDR 200 */ if (ddrc_clk <= 350 && ddrc_clk > 230) { /* DDR controller clk at 230~350 */ printf("DDR: DDR controller freq is more than " "max data rate of the module\n"); return 0; } else if (ddrc_clk <= 230 && ddrc_clk > 90) { /* DDR controller clk at 90~230 */ effective_data_rate = 200; /* 10ns */ caslat = caslat; } } debug("DDR:Effective data rate is: %dMHz\n", effective_data_rate); debug("DDR:The MSB 1 of CAS Latency is: %d\n", caslat); /* * Errata DDR6 work around: input enable 2 cycles earlier. * including MPC834X Rev1.0/1.1 and MPC8360 Rev1.1/1.2. */ if(PVR_MAJ(pvr) <= 1 && spd.mem_type == SPD_MEMTYPE_DDR){ if (caslat == 2) ddr->debug_reg = 0x201c0000; /* CL=2 */ else if (caslat == 3) ddr->debug_reg = 0x202c0000; /* CL=2.5 */ else if (caslat == 4) ddr->debug_reg = 0x202c0000; /* CL=3.0 */ sync(); debug("Errata DDR6 (debug_reg=0x%08x)\n", ddr->debug_reg); } /* * Convert caslat clocks to DDR controller value. * Force caslat_ctrl to be DDR Controller field-sized. */ if (spd.mem_type == SPD_MEMTYPE_DDR) { caslat_ctrl = (caslat + 1) & 0x07; } else { caslat_ctrl = (2 * caslat - 1) & 0x0f; } debug("DDR: effective data rate is %d MHz\n", effective_data_rate); debug("DDR: caslat SPD bit is %d, controller field is 0x%x\n", caslat, caslat_ctrl); /* * Timing Config 0. * Avoid writing for DDR I. */ if (spd.mem_type == SPD_MEMTYPE_DDR2) { unsigned char taxpd_clk = 8; /* By the book. */ unsigned char tmrd_clk = 2; /* By the book. */ unsigned char act_pd_exit = 2; /* Empirical? */ unsigned char pre_pd_exit = 6; /* Empirical? */ ddr->timing_cfg_0 = (0 | ((act_pd_exit & 0x7) << 20) /* ACT_PD_EXIT */ | ((pre_pd_exit & 0x7) << 16) /* PRE_PD_EXIT */ | ((taxpd_clk & 0xf) << 8) /* ODT_PD_EXIT */ | ((tmrd_clk & 0xf) << 0) /* MRS_CYC */ ); debug("DDR: timing_cfg_0 = 0x%08x\n", ddr->timing_cfg_0); } /* * For DDR I, WRREC(Twr) and WRTORD(Twtr) are not in SPD, * use conservative value. * For DDR II, they are bytes 36 and 37, in quarter nanos. */ if (spd.mem_type == SPD_MEMTYPE_DDR) { twr_clk = 3; /* Clocks */ twtr_clk = 1; /* Clocks */ } else { twr_clk = picos_to_clk(spd.twr * 250); twtr_clk = picos_to_clk(spd.twtr * 250); if (twtr_clk < 2) twtr_clk = 2; } /* * Calculate Trfc, in picos. * DDR I: Byte 42 straight up in ns. * DDR II: Byte 40 and 42 swizzled some, in ns. */ if (spd.mem_type == SPD_MEMTYPE_DDR) { trfc = spd.trfc * 1000; /* up to ps */ } else { unsigned int byte40_table_ps[8] = { 0, 250, 330, 500, 660, 750, 0, 0 }; trfc = (((spd.trctrfc_ext & 0x1) * 256) + spd.trfc) * 1000 + byte40_table_ps[(spd.trctrfc_ext >> 1) & 0x7]; } trfc_clk = picos_to_clk(trfc); /* * Trcd, Byte 29, from quarter nanos to ps and clocks. */ trcd_clk = picos_to_clk(spd.trcd * 250) & 0x7; /* * Convert trfc_clk to DDR controller fields. DDR I should * fit in the REFREC field (16-19) of TIMING_CFG_1, but the * 83xx controller has an extended REFREC field of three bits. * The controller automatically adds 8 clocks to this value, * so preadjust it down 8 first before splitting it up. */ trfc_low = (trfc_clk - 8) & 0xf; ddr->timing_cfg_1 = (((picos_to_clk(spd.trp * 250) & 0x07) << 28 ) | /* PRETOACT */ ((picos_to_clk(spd.tras * 1000) & 0x0f ) << 24 ) | /* ACTTOPRE */ (trcd_clk << 20 ) | /* ACTTORW */ (caslat_ctrl << 16 ) | /* CASLAT */ (trfc_low << 12 ) | /* REFEC */ ((twr_clk & 0x07) << 8) | /* WRRREC */ ((picos_to_clk(spd.trrd * 250) & 0x07) << 4) | /* ACTTOACT */ ((twtr_clk & 0x07) << 0) /* WRTORD */ ); /* * Additive Latency * For DDR I, 0. * For DDR II, with ODT enabled, use "a value" less than ACTTORW, * which comes from Trcd, and also note that: * add_lat + caslat must be >= 4 */ add_lat = 0; if (spd.mem_type == SPD_MEMTYPE_DDR2 && (odt_wr_cfg || odt_rd_cfg) && (caslat < 4)) { add_lat = 4 - caslat; if ((add_lat + caslat) < 4) { add_lat = 0; } } /* * Write Data Delay * Historically 0x2 == 4/8 clock delay. * Empirically, 0x3 == 6/8 clock delay is suggested for DDR I 266. */ wr_data_delay = 2; #ifdef CONFIG_SYS_DDR_WRITE_DATA_DELAY wr_data_delay = CONFIG_SYS_DDR_WRITE_DATA_DELAY; #endif /* * Write Latency * Read to Precharge * Minimum CKE Pulse Width. * Four Activate Window */ if (spd.mem_type == SPD_MEMTYPE_DDR) { /* * This is a lie. It should really be 1, but if it is * set to 1, bits overlap into the old controller's * otherwise unused ACSM field. If we leave it 0, then * the HW will magically treat it as 1 for DDR 1. Oh Yea. */ wr_lat = 0; trtp_clk = 2; /* By the book. */ cke_min_clk = 1; /* By the book. */ four_act = 1; /* By the book. */ } else { wr_lat = caslat - 1; /* Convert SPD value from quarter nanos to picos. */ trtp_clk = picos_to_clk(spd.trtp * 250); if (trtp_clk < 2) trtp_clk = 2; trtp_clk += add_lat; cke_min_clk = 3; /* By the book. */ four_act = picos_to_clk(37500); /* By the book. 1k pages? */ } /* * Empirically set ~MCAS-to-preamble override for DDR 2. * Your mileage will vary. */ cpo = 0; if (spd.mem_type == SPD_MEMTYPE_DDR2) { #ifdef CONFIG_SYS_DDR_CPO cpo = CONFIG_SYS_DDR_CPO; #else if (effective_data_rate == 266) { cpo = 0x4; /* READ_LAT + 1/2 */ } else if (effective_data_rate == 333) { cpo = 0x6; /* READ_LAT + 1 */ } else if (effective_data_rate == 400) { cpo = 0x7; /* READ_LAT + 5/4 */ } else { /* Automatic calibration */ cpo = 0x1f; } #endif } ddr->timing_cfg_2 = (0 | ((add_lat & 0x7) << 28) /* ADD_LAT */ | ((cpo & 0x1f) << 23) /* CPO */ | ((wr_lat & 0x7) << 19) /* WR_LAT */ | ((trtp_clk & 0x7) << 13) /* RD_TO_PRE */ | ((wr_data_delay & 0x7) << 10) /* WR_DATA_DELAY */ | ((cke_min_clk & 0x7) << 6) /* CKE_PLS */ | ((four_act & 0x1f) << 0) /* FOUR_ACT */ ); debug("DDR:timing_cfg_1=0x%08x\n", ddr->timing_cfg_1); debug("DDR:timing_cfg_2=0x%08x\n", ddr->timing_cfg_2); /* Check DIMM data bus width */ if (spd.dataw_lsb < 64) { if (spd.mem_type == SPD_MEMTYPE_DDR) burstlen = 0x03; /* 32 bit data bus, burst len is 8 */ else burstlen = 0x02; /* 32 bit data bus, burst len is 4 */ debug("\n DDR DIMM: data bus width is 32 bit"); } else { burstlen = 0x02; /* Others act as 64 bit bus, burst len is 4 */ debug("\n DDR DIMM: data bus width is 64 bit"); } /* Is this an ECC DDR chip? */ if (spd.config == 0x02) debug(" with ECC\n"); else debug(" without ECC\n"); /* Burst length is always 4 for 64 bit data bus, 8 for 32 bit data bus, Burst type is sequential */ if (spd.mem_type == SPD_MEMTYPE_DDR) { switch (caslat) { case 1: ddr->sdram_mode = 0x50 | burstlen; /* CL=1.5 */ break; case 2: ddr->sdram_mode = 0x20 | burstlen; /* CL=2.0 */ break; case 3: ddr->sdram_mode = 0x60 | burstlen; /* CL=2.5 */ break; case 4: ddr->sdram_mode = 0x30 | burstlen; /* CL=3.0 */ break; default: printf("DDR:only CL 1.5, 2.0, 2.5, 3.0 is supported\n"); return 0; } } else { mode_odt_enable = 0x0; /* Default disabled */ if (odt_wr_cfg || odt_rd_cfg) { /* * Bits 6 and 2 in Extended MRS(1) * Bit 2 == 0x04 == 75 Ohm, with 2 DIMM modules. * Bit 6 == 0x40 == 150 Ohm, with 1 DIMM module. */ mode_odt_enable = 0x40; /* 150 Ohm */ } ddr->sdram_mode = (0 | (1 << (16 + 10)) /* DQS Differential disable */ #ifdef CFG_SYS_DDR_MODE_WEAK | (1 << (16 + 1)) /* weak driver (~60%) */ #endif | (add_lat << (16 + 3)) /* Additive Latency in EMRS1 */ | (mode_odt_enable << 16) /* ODT Enable in EMRS1 */ | ((twr_clk - 1) << 9) /* Write Recovery Autopre */ | (caslat << 4) /* caslat */ | (burstlen << 0) /* Burst length */ ); } debug("DDR:sdram_mode=0x%08x\n", ddr->sdram_mode); /* * Clear EMRS2 and EMRS3. */ ddr->sdram_mode2 = 0; debug("DDR: sdram_mode2 = 0x%08x\n", ddr->sdram_mode2); switch (spd.refresh) { case 0x00: case 0x80: refresh_clk = picos_to_clk(15625000); break; case 0x01: case 0x81: refresh_clk = picos_to_clk(3900000); break; case 0x02: case 0x82: refresh_clk = picos_to_clk(7800000); break; case 0x03: case 0x83: refresh_clk = picos_to_clk(31300000); break; case 0x04: case 0x84: refresh_clk = picos_to_clk(62500000); break; case 0x05: case 0x85: refresh_clk = picos_to_clk(125000000); break; default: refresh_clk = 0x512; break; } /* * Set BSTOPRE to 0x100 for page mode * If auto-charge is used, set BSTOPRE = 0 */ ddr->sdram_interval = ((refresh_clk & 0x3fff) << 16) | 0x100; debug("DDR:sdram_interval=0x%08x\n", ddr->sdram_interval); /* * SDRAM Cfg 2 */ odt_cfg = 0; #ifndef CONFIG_NEVER_ASSERT_ODT_TO_CPU if (odt_rd_cfg | odt_wr_cfg) { odt_cfg = 0x2; /* ODT to IOs during reads */ } #endif if (spd.mem_type == SPD_MEMTYPE_DDR2) { ddr->sdram_cfg2 = (0 | (0 << 26) /* True DQS */ | (odt_cfg << 21) /* ODT only read */ | (1 << 12) /* 1 refresh at a time */ ); debug("DDR: sdram_cfg2 = 0x%08x\n", ddr->sdram_cfg2); } #ifdef CFG_SYS_DDR_SDRAM_CLK_CNTL /* Optional platform specific value */ ddr->sdram_clk_cntl = CFG_SYS_DDR_SDRAM_CLK_CNTL; #endif debug("DDR:sdram_clk_cntl=0x%08x\n", ddr->sdram_clk_cntl); sync(); isync(); udelay(600); /* * Figure out the settings for the sdram_cfg register. Build up * the value in 'sdram_cfg' before writing since the write into * the register will actually enable the memory controller, and all * settings must be done before enabling. * * sdram_cfg[0] = 1 (ddr sdram logic enable) * sdram_cfg[1] = 1 (self-refresh-enable) * sdram_cfg[5:7] = (SDRAM type = DDR SDRAM) * 010 DDR 1 SDRAM * 011 DDR 2 SDRAM * sdram_cfg[12] = 0 (32_BE =0 , 64 bit bus mode) * sdram_cfg[13] = 0 (8_BE =0, 4-beat bursts) */ if (spd.mem_type == SPD_MEMTYPE_DDR) sdram_type = SDRAM_CFG_SDRAM_TYPE_DDR1; else sdram_type = SDRAM_CFG_SDRAM_TYPE_DDR2; sdram_cfg = (0 | SDRAM_CFG_MEM_EN /* DDR enable */ | SDRAM_CFG_SREN /* Self refresh */ | sdram_type /* SDRAM type */ ); /* sdram_cfg[3] = RD_EN - registered DIMM enable */ if (spd.mod_attr & 0x02) sdram_cfg |= SDRAM_CFG_RD_EN; /* The DIMM is 32bit width */ if (spd.dataw_lsb < 64) { if (spd.mem_type == SPD_MEMTYPE_DDR) sdram_cfg |= SDRAM_CFG_32_BE | SDRAM_CFG_8_BE; if (spd.mem_type == SPD_MEMTYPE_DDR2) sdram_cfg |= SDRAM_CFG_32_BE; } ddrc_ecc_enable = 0; #if defined(CONFIG_DDR_ECC) /* Enable ECC with sdram_cfg[2] */ if (spd.config == 0x02) { sdram_cfg |= 0x20000000; ddrc_ecc_enable = 1; /* disable error detection */ ddr->err_disable = ~ECC_ERROR_ENABLE; /* set single bit error threshold to maximum value, * reset counter to zero */ ddr->err_sbe = (255 << ECC_ERROR_MAN_SBET_SHIFT) | (0 << ECC_ERROR_MAN_SBEC_SHIFT); } debug("DDR:err_disable=0x%08x\n", ddr->err_disable); debug("DDR:err_sbe=0x%08x\n", ddr->err_sbe); #endif debug(" DDRC ECC mode: %s\n", ddrc_ecc_enable ? "ON":"OFF"); /* Enable controller, and GO! */ ddr->sdram_cfg = sdram_cfg; sync(); isync(); udelay(500); debug("DDR:sdram_cfg=0x%08x\n", ddr->sdram_cfg); return memsize; /*in MBytes*/ } #endif /* CONFIG_SPD_EEPROM */ #if defined(CONFIG_DDR_ECC) && !defined(CONFIG_ECC_INIT_VIA_DDRCONTROLLER) static inline u32 mftbu(void) { u32 rval; asm volatile("mftbu %0" : "=r" (rval)); return rval; } static inline u32 mftb(void) { u32 rval; asm volatile("mftb %0" : "=r" (rval)); return rval; } /* * Use timebase counter, get_timer() is not available * at this point of initialization yet. */ static __inline__ unsigned long get_tbms (void) { unsigned long tbl; unsigned long tbu1, tbu2; unsigned long ms; unsigned long long tmp; ulong tbclk = get_tbclk(); /* get the timebase ticks */ do { tbu1 = mftbu(); tbl = mftb(); tbu2 = mftbu(); } while (tbu1 != tbu2); /* convert ticks to ms */ tmp = (unsigned long long)(tbu1); tmp = (tmp << 32); tmp += (unsigned long long)(tbl); ms = tmp/(tbclk/1000); return ms; } /* * Initialize all of memory for ECC, then enable errors. */ void ddr_enable_ecc(unsigned int dram_size) { volatile immap_t *immap = (immap_t *)CONFIG_SYS_IMMR; volatile ddr83xx_t *ddr= &immap->ddr; unsigned long t_start, t_end; register u64 *p; register uint size; unsigned int pattern[2]; icache_enable(); t_start = get_tbms(); pattern[0] = 0xdeadbeef; pattern[1] = 0xdeadbeef; debug("ddr init: CPU FP write method\n"); size = dram_size; for (p = 0; p < (u64*)(size); p++) { ppcDWstore((u32*)p, pattern); } sync(); t_end = get_tbms(); icache_disable(); debug("\nREADY!!\n"); debug("ddr init duration: %ld ms\n", t_end - t_start); /* Clear All ECC Errors */ if ((ddr->err_detect & ECC_ERROR_DETECT_MME) == ECC_ERROR_DETECT_MME) ddr->err_detect |= ECC_ERROR_DETECT_MME; if ((ddr->err_detect & ECC_ERROR_DETECT_MBE) == ECC_ERROR_DETECT_MBE) ddr->err_detect |= ECC_ERROR_DETECT_MBE; if ((ddr->err_detect & ECC_ERROR_DETECT_SBE) == ECC_ERROR_DETECT_SBE) ddr->err_detect |= ECC_ERROR_DETECT_SBE; if ((ddr->err_detect & ECC_ERROR_DETECT_MSE) == ECC_ERROR_DETECT_MSE) ddr->err_detect |= ECC_ERROR_DETECT_MSE; /* Disable ECC-Interrupts */ ddr->err_int_en &= ECC_ERR_INT_DISABLE; /* Enable errors for ECC */ ddr->err_disable &= ECC_ERROR_ENABLE; sync(); isync(); } #endif /* CONFIG_DDR_ECC */ #endif /* !CONFIG_MPC83XX_SDRAM */