/* * Copyright 2008 Freescale Semiconductor, Inc. * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License * Version 2 as published by the Free Software Foundation. */ /* * Generic driver for Freescale DDR/DDR2/DDR3 memory controller. * Based on code from spd_sdram.c * Author: James Yang [at freescale.com] */ #include #include #include "ddr.h" extern unsigned int picos_to_mclk(unsigned int picos); /* * Determine Rtt value. * * This should likely be either board or controller specific. * * Rtt(nominal): * 0 = Rtt disabled * 1 = 75 ohm * 2 = 150 ohm * 3 = 50 ohm * * FIXME: Apparently 8641 needs a value of 2 * FIXME: Old code seys if 667 MHz or higher, use 3 on 8572 * * FIXME: There was some effort down this line earlier: * * unsigned int i; * for (i = 0; i < CONFIG_CHIP_SELECTS_PER_CTRL/2; i++) { * if (popts->dimmslot[i].num_valid_cs * && (popts->cs_local_opts[2*i].odt_rd_cfg * || popts->cs_local_opts[2*i].odt_wr_cfg)) { * rtt = 2; * break; * } * } */ static inline int fsl_ddr_get_rtt(void) { int rtt; #if defined(CONFIG_FSL_DDR1) rtt = 0; #elif defined(CONFIG_FSL_DDR2) rtt = 3; #else #error "Need Rtt value for DDR3" #endif return rtt; } /* Chip Select Configuration (CSn_CONFIG) */ static void set_csn_config(int i, fsl_ddr_cfg_regs_t *ddr, const memctl_options_t *popts, const dimm_params_t *dimm_params) { unsigned int cs_n_en = 0; /* Chip Select enable */ unsigned int intlv_en = 0; /* Memory controller interleave enable */ unsigned int intlv_ctl = 0; /* Interleaving control */ unsigned int ap_n_en = 0; /* Chip select n auto-precharge enable */ unsigned int odt_rd_cfg = 0; /* ODT for reads configuration */ unsigned int odt_wr_cfg = 0; /* ODT for writes configuration */ unsigned int ba_bits_cs_n = 0; /* Num of bank bits for SDRAM on CSn */ unsigned int row_bits_cs_n = 0; /* Num of row bits for SDRAM on CSn */ unsigned int col_bits_cs_n = 0; /* Num of ocl bits for SDRAM on CSn */ /* Compute CS_CONFIG only for existing ranks of each DIMM. */ if ((((i&1) == 0) && (dimm_params[i/2].n_ranks == 1)) || (dimm_params[i/2].n_ranks == 2)) { unsigned int n_banks_per_sdram_device; cs_n_en = 1; if (i == 0) { /* These fields only available in CS0_CONFIG */ intlv_en = popts->memctl_interleaving; intlv_ctl = popts->memctl_interleaving_mode; } ap_n_en = popts->cs_local_opts[i].auto_precharge; odt_rd_cfg = popts->cs_local_opts[i].odt_rd_cfg; odt_wr_cfg = popts->cs_local_opts[i].odt_wr_cfg; n_banks_per_sdram_device = dimm_params[i/2].n_banks_per_sdram_device; ba_bits_cs_n = __ilog2(n_banks_per_sdram_device) - 2; row_bits_cs_n = dimm_params[i/2].n_row_addr - 12; col_bits_cs_n = dimm_params[i/2].n_col_addr - 8; } ddr->cs[i].config = (0 | ((cs_n_en & 0x1) << 31) | ((intlv_en & 0x3) << 29) | ((intlv_ctl & 0xf) << 24) | ((ap_n_en & 0x1) << 23) /* XXX: some implementation only have 1 bit starting at left */ | ((odt_rd_cfg & 0x7) << 20) /* XXX: Some implementation only have 1 bit starting at left */ | ((odt_wr_cfg & 0x7) << 16) | ((ba_bits_cs_n & 0x3) << 14) | ((row_bits_cs_n & 0x7) << 8) | ((col_bits_cs_n & 0x7) << 0) ); debug("FSLDDR: cs[%d]_config = 0x%08x\n", i,ddr->cs[i].config); } /* Chip Select Configuration 2 (CSn_CONFIG_2) */ /* FIXME: 8572 */ static void set_csn_config_2(int i, fsl_ddr_cfg_regs_t *ddr) { unsigned int pasr_cfg = 0; /* Partial array self refresh config */ ddr->cs[i].config_2 = ((pasr_cfg & 7) << 24); debug("FSLDDR: cs[%d]_config_2 = 0x%08x\n", i, ddr->cs[i].config_2); } /* -3E = 667 CL5, -25 = CL6 800, -25E = CL5 800 */ #if defined(CONFIG_FSL_DDR2) /* * DDR SDRAM Timing Configuration 0 (TIMING_CFG_0) * * Avoid writing for DDR I. The new PQ38 DDR controller * dreams up non-zero default values to be backwards compatible. */ static void set_timing_cfg_0(fsl_ddr_cfg_regs_t *ddr) { unsigned char trwt_mclk = 0; /* Read-to-write turnaround */ unsigned char twrt_mclk = 0; /* Write-to-read turnaround */ /* 7.5 ns on -3E; 0 means WL - CL + BL/2 + 1 */ unsigned char trrt_mclk = 0; /* Read-to-read turnaround */ unsigned char twwt_mclk = 0; /* Write-to-write turnaround */ /* Active powerdown exit timing (tXARD and tXARDS). */ unsigned char act_pd_exit_mclk; /* Precharge powerdown exit timing (tXP). */ unsigned char pre_pd_exit_mclk; /* Precharge powerdown exit timing (tAXPD). */ unsigned char taxpd_mclk; /* Mode register set cycle time (tMRD). */ unsigned char tmrd_mclk; /* (tXARD and tXARDS). Empirical? */ act_pd_exit_mclk = 2; /* XXX: tXARD = 2, tXARDS = 7 - AL. * Empirical? */ pre_pd_exit_mclk = 6; /* FIXME: tXP = 2 on Micron 667 MHz DIMM */ taxpd_mclk = 8; tmrd_mclk = 2; ddr->timing_cfg_0 = (0 | ((trwt_mclk & 0x3) << 30) /* RWT */ | ((twrt_mclk & 0x3) << 28) /* WRT */ | ((trrt_mclk & 0x3) << 26) /* RRT */ | ((twwt_mclk & 0x3) << 24) /* WWT */ | ((act_pd_exit_mclk & 0x7) << 20) /* ACT_PD_EXIT */ | ((pre_pd_exit_mclk & 0x7) << 16) /* PRE_PD_EXIT */ | ((taxpd_mclk & 0xf) << 8) /* ODT_PD_EXIT */ | ((tmrd_mclk & 0xf) << 0) /* MRS_CYC */ ); debug("FSLDDR: timing_cfg_0 = 0x%08x\n", ddr->timing_cfg_0); } #endif /* defined(CONFIG_FSL_DDR2) */ /* DDR SDRAM Timing Configuration 3 (TIMING_CFG_3) */ static void set_timing_cfg_3(fsl_ddr_cfg_regs_t *ddr, const common_timing_params_t *common_dimm) { /* Extended Activate to precharge interval (tRAS) */ unsigned int ext_acttopre = 0; unsigned int ext_refrec; /* Extended refresh recovery time (tRFC) */ unsigned int ext_caslat = 0; /* Extended MCAS latency from READ cmd */ unsigned int cntl_adj = 0; /* Control Adjust */ /* If the tRAS > 19 MCLK, we use the ext mode */ if (picos_to_mclk(common_dimm->tRAS_ps) > 0x13) ext_acttopre = 1; ext_refrec = (picos_to_mclk(common_dimm->tRFC_ps) - 8) >> 4; ddr->timing_cfg_3 = (0 | ((ext_acttopre & 0x1) << 24) | ((ext_refrec & 0xF) << 16) | ((ext_caslat & 0x1) << 12) | ((cntl_adj & 0x7) << 0) ); debug("FSLDDR: timing_cfg_3 = 0x%08x\n", ddr->timing_cfg_3); } /* DDR SDRAM Timing Configuration 1 (TIMING_CFG_1) */ static void set_timing_cfg_1(fsl_ddr_cfg_regs_t *ddr, const common_timing_params_t *common_dimm, unsigned int cas_latency) { /* Precharge-to-activate interval (tRP) */ unsigned char pretoact_mclk; /* Activate to precharge interval (tRAS) */ unsigned char acttopre_mclk; /* Activate to read/write interval (tRCD) */ unsigned char acttorw_mclk; /* CASLAT */ unsigned char caslat_ctrl; /* Refresh recovery time (tRFC) ; trfc_low */ unsigned char refrec_ctrl; /* Last data to precharge minimum interval (tWR) */ unsigned char wrrec_mclk; /* Activate-to-activate interval (tRRD) */ unsigned char acttoact_mclk; /* Last write data pair to read command issue interval (tWTR) */ unsigned char wrtord_mclk; pretoact_mclk = picos_to_mclk(common_dimm->tRP_ps); acttopre_mclk = picos_to_mclk(common_dimm->tRAS_ps); acttorw_mclk = picos_to_mclk(common_dimm->tRCD_ps); /* * Translate CAS Latency 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 4 0111 * 4.5 1000 * 5.0 5 1001 */ #if defined(CONFIG_FSL_DDR1) caslat_ctrl = (cas_latency + 1) & 0x07; #elif defined(CONFIG_FSL_DDR2) caslat_ctrl = 2 * cas_latency - 1; #else #error "Need CAS Latency help for DDR3 in fsl_ddr_sdram.c" #endif refrec_ctrl = picos_to_mclk(common_dimm->tRFC_ps) - 8; wrrec_mclk = picos_to_mclk(common_dimm->tWR_ps); acttoact_mclk = picos_to_mclk(common_dimm->tRRD_ps); wrtord_mclk = picos_to_mclk(common_dimm->tWTR_ps); ddr->timing_cfg_1 = (0 | ((pretoact_mclk & 0x0F) << 28) | ((acttopre_mclk & 0x0F) << 24) | ((acttorw_mclk & 0xF) << 20) | ((caslat_ctrl & 0xF) << 16) | ((refrec_ctrl & 0xF) << 12) | ((wrrec_mclk & 0x0F) << 8) | ((acttoact_mclk & 0x07) << 4) | ((wrtord_mclk & 0x07) << 0) ); debug("FSLDDR: timing_cfg_1 = 0x%08x\n", ddr->timing_cfg_1); } /* DDR SDRAM Timing Configuration 2 (TIMING_CFG_2) */ static void set_timing_cfg_2(fsl_ddr_cfg_regs_t *ddr, const memctl_options_t *popts, const common_timing_params_t *common_dimm, unsigned int cas_latency, unsigned int additive_latency) { /* Additive latency */ unsigned char add_lat_mclk; /* CAS-to-preamble override */ unsigned short cpo; /* Write latency */ unsigned char wr_lat; /* Read to precharge (tRTP) */ unsigned char rd_to_pre; /* Write command to write data strobe timing adjustment */ unsigned char wr_data_delay; /* Minimum CKE pulse width (tCKE) */ unsigned char cke_pls; /* Window for four activates (tFAW) */ unsigned short four_act; /* FIXME add check that this must be less than acttorw_mclk */ add_lat_mclk = additive_latency; cpo = popts->cpo_override; #if defined(CONFIG_FSL_DDR1) /* * 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; #elif defined(CONFIG_FSL_DDR2) wr_lat = cas_latency + additive_latency - 1; #else #error "Fix WR_LAT for DDR3" #endif rd_to_pre = picos_to_mclk(common_dimm->tRTP_ps); wr_data_delay = popts->write_data_delay; cke_pls = picos_to_mclk(popts->tCKE_clock_pulse_width_ps); four_act = picos_to_mclk(popts->tFAW_window_four_activates_ps); ddr->timing_cfg_2 = (0 | ((add_lat_mclk & 0x7) << 28) | ((cpo & 0x1f) << 23) | ((wr_lat & 0x7) << 19) | ((rd_to_pre & 0x7) << 13) | ((wr_data_delay & 0x7) << 10) | ((cke_pls & 0x7) << 6) | ((four_act & 0x1f) << 0) ); debug("FSLDDR: timing_cfg_2 = 0x%08x\n", ddr->timing_cfg_2); } /* DDR SDRAM control configuration (DDR_SDRAM_CFG) */ static void set_ddr_sdram_cfg(fsl_ddr_cfg_regs_t *ddr, const memctl_options_t *popts, const common_timing_params_t *common_dimm) { unsigned int mem_en; /* DDR SDRAM interface logic enable */ unsigned int sren; /* Self refresh enable (during sleep) */ unsigned int ecc_en; /* ECC enable. */ unsigned int rd_en; /* Registered DIMM enable */ unsigned int sdram_type; /* Type of SDRAM */ unsigned int dyn_pwr; /* Dynamic power management mode */ unsigned int dbw; /* DRAM dta bus width */ unsigned int eight_be; /* 8-beat burst enable */ unsigned int ncap = 0; /* Non-concurrent auto-precharge */ unsigned int threeT_en; /* Enable 3T timing */ unsigned int twoT_en; /* Enable 2T timing */ unsigned int ba_intlv_ctl; /* Bank (CS) interleaving control */ unsigned int x32_en = 0; /* x32 enable */ unsigned int pchb8 = 0; /* precharge bit 8 enable */ unsigned int hse; /* Global half strength override */ unsigned int mem_halt = 0; /* memory controller halt */ unsigned int bi = 0; /* Bypass initialization */ mem_en = 1; sren = popts->self_refresh_in_sleep; if (common_dimm->all_DIMMs_ECC_capable) { /* Allow setting of ECC only if all DIMMs are ECC. */ ecc_en = popts->ECC_mode; } else { ecc_en = 0; } rd_en = (common_dimm->all_DIMMs_registered && !common_dimm->all_DIMMs_unbuffered); sdram_type = CONFIG_FSL_SDRAM_TYPE; dyn_pwr = popts->dynamic_power; dbw = popts->data_bus_width; eight_be = 0; /* always 0 for DDR2 */ threeT_en = popts->threeT_en; twoT_en = popts->twoT_en; ba_intlv_ctl = popts->ba_intlv_ctl; hse = popts->half_strength_driver_enable; ddr->ddr_sdram_cfg = (0 | ((mem_en & 0x1) << 31) | ((sren & 0x1) << 30) | ((ecc_en & 0x1) << 29) | ((rd_en & 0x1) << 28) | ((sdram_type & 0x7) << 24) | ((dyn_pwr & 0x1) << 21) | ((dbw & 0x3) << 19) | ((eight_be & 0x1) << 18) | ((ncap & 0x1) << 17) | ((threeT_en & 0x1) << 16) | ((twoT_en & 0x1) << 15) | ((ba_intlv_ctl & 0x7F) << 8) | ((x32_en & 0x1) << 5) | ((pchb8 & 0x1) << 4) | ((hse & 0x1) << 3) | ((mem_halt & 0x1) << 1) | ((bi & 0x1) << 0) ); debug("FSLDDR: ddr_sdram_cfg = 0x%08x\n", ddr->ddr_sdram_cfg); } /* DDR SDRAM control configuration 2 (DDR_SDRAM_CFG_2) */ static void set_ddr_sdram_cfg_2(fsl_ddr_cfg_regs_t *ddr, const memctl_options_t *popts) { unsigned int frc_sr = 0; /* Force self refresh */ unsigned int sr_ie = 0; /* Self-refresh interrupt enable */ unsigned int dll_rst_dis; /* DLL reset disable */ unsigned int dqs_cfg; /* DQS configuration */ unsigned int odt_cfg; /* ODT configuration */ unsigned int num_pr; /* Number of posted refreshes */ unsigned int obc_cfg; /* On-The-Fly Burst Chop Cfg */ unsigned int ap_en; /* Address Parity Enable */ unsigned int d_init; /* DRAM data initialization */ unsigned int rcw_en = 0; /* Register Control Word Enable */ unsigned int md_en = 0; /* Mirrored DIMM Enable */ dll_rst_dis = 1; /* Make this configurable */ dqs_cfg = popts->DQS_config; if (popts->cs_local_opts[0].odt_rd_cfg || popts->cs_local_opts[0].odt_wr_cfg) { /* FIXME */ odt_cfg = 2; } else { odt_cfg = 0; } num_pr = 1; /* Make this configurable */ /* * 8572 manual says * {TIMING_CFG_1[PRETOACT] * + [DDR_SDRAM_CFG_2[NUM_PR] * * ({EXT_REFREC || REFREC} + 8 + 2)]} * << DDR_SDRAM_INTERVAL[REFINT] */ obc_cfg = 0; /* Make this configurable? */ ap_en = 0; /* Make this configurable? */ #if defined(CONFIG_ECC_INIT_VIA_DDRCONTROLLER) /* Use the DDR controller to auto initialize memory. */ d_init = 1; ddr->ddr_data_init = CONFIG_MEM_INIT_VALUE; debug("DDR: ddr_data_init = 0x%08x\n", ddr->ddr_data_init); #else /* Memory will be initialized via DMA, or not at all. */ d_init = 0; #endif ddr->ddr_sdram_cfg_2 = (0 | ((frc_sr & 0x1) << 31) | ((sr_ie & 0x1) << 30) | ((dll_rst_dis & 0x1) << 29) | ((dqs_cfg & 0x3) << 26) | ((odt_cfg & 0x3) << 21) | ((num_pr & 0xf) << 12) | ((obc_cfg & 0x1) << 6) | ((ap_en & 0x1) << 5) | ((d_init & 0x1) << 4) | ((rcw_en & 0x1) << 2) | ((md_en & 0x1) << 0) ); debug("FSLDDR: ddr_sdram_cfg_2 = 0x%08x\n", ddr->ddr_sdram_cfg_2); } /* DDR SDRAM Mode configuration 2 (DDR_SDRAM_MODE_2) */ static void set_ddr_sdram_mode_2(fsl_ddr_cfg_regs_t *ddr) { unsigned short esdmode2 = 0; /* Extended SDRAM mode 2 */ unsigned short esdmode3 = 0; /* Extended SDRAM mode 3 */ ddr->ddr_sdram_mode_2 = (0 | ((esdmode2 & 0xFFFF) << 16) | ((esdmode3 & 0xFFFF) << 0) ); debug("FSLDDR: ddr_sdram_mode_2 = 0x%08x\n", ddr->ddr_sdram_mode_2); } /* DDR SDRAM Interval Configuration (DDR_SDRAM_INTERVAL) */ static void set_ddr_sdram_interval(fsl_ddr_cfg_regs_t *ddr, const memctl_options_t *popts, const common_timing_params_t *common_dimm) { unsigned int refint; /* Refresh interval */ unsigned int bstopre; /* Precharge interval */ refint = picos_to_mclk(common_dimm->refresh_rate_ps); bstopre = popts->bstopre; /* refint field used 0x3FFF in earlier controllers */ ddr->ddr_sdram_interval = (0 | ((refint & 0xFFFF) << 16) | ((bstopre & 0x3FFF) << 0) ); debug("FSLDDR: ddr_sdram_interval = 0x%08x\n", ddr->ddr_sdram_interval); } /* DDR SDRAM Mode configuration set (DDR_SDRAM_MODE) */ static void set_ddr_sdram_mode(fsl_ddr_cfg_regs_t *ddr, const memctl_options_t *popts, const common_timing_params_t *common_dimm, unsigned int cas_latency, unsigned int additive_latency) { unsigned short esdmode; /* Extended SDRAM mode */ unsigned short sdmode; /* SDRAM mode */ /* * FIXME: This ought to be pre-calculated in a * technology-specific routine, * e.g. compute_DDR2_mode_register(), and then the * sdmode and esdmode passed in as part of common_dimm. */ /* Extended Mode Register */ unsigned int mrs = 0; /* Mode Register Set */ unsigned int outputs = 0; /* 0=Enabled, 1=Disabled */ unsigned int rdqs_en = 0; /* RDQS Enable: 0=no, 1=yes */ unsigned int dqs_en = 0; /* DQS# Enable: 0=enable, 1=disable */ unsigned int ocd = 0; /* 0x0=OCD not supported, 0x7=OCD default state */ unsigned int rtt; unsigned int al; /* Posted CAS# additive latency (AL) */ unsigned int ods = 0; /* Output Drive Strength: 0 = Full strength (18ohm) 1 = Reduced strength (4ohm) */ unsigned int dll_en = 0; /* DLL Enable 0=Enable (Normal), 1=Disable (Test/Debug) */ /* Mode Register (MR) */ unsigned int mr; /* Mode Register Definition */ unsigned int pd; /* Power-Down Mode */ unsigned int wr; /* Write Recovery */ unsigned int dll_res; /* DLL Reset */ unsigned int mode; /* Normal=0 or Test=1 */ unsigned int caslat = 0;/* CAS# latency */ /* BT: Burst Type (0=Sequential, 1=Interleaved) */ unsigned int bt; unsigned int bl; /* BL: Burst Length */ #if defined(CONFIG_FSL_DDR2) const unsigned int mclk_ps = get_memory_clk_period_ps(); #endif rtt = fsl_ddr_get_rtt(); al = additive_latency; esdmode = (0 | ((mrs & 0x3) << 14) | ((outputs & 0x1) << 12) | ((rdqs_en & 0x1) << 11) | ((dqs_en & 0x1) << 10) | ((ocd & 0x7) << 7) | ((rtt & 0x2) << 5) /* rtt field is split */ | ((al & 0x7) << 3) | ((rtt & 0x1) << 2) /* rtt field is split */ | ((ods & 0x1) << 1) | ((dll_en & 0x1) << 0) ); mr = 0; /* FIXME: CHECKME */ /* * 0 = Fast Exit (Normal) * 1 = Slow Exit (Low Power) */ pd = 0; #if defined(CONFIG_FSL_DDR1) wr = 0; /* Historical */ #elif defined(CONFIG_FSL_DDR2) wr = (common_dimm->tWR_ps + mclk_ps - 1) / mclk_ps - 1; #else #error "Write tWR_auto for DDR3" #endif dll_res = 0; mode = 0; #if defined(CONFIG_FSL_DDR1) if (1 <= cas_latency && cas_latency <= 4) { unsigned char mode_caslat_table[4] = { 0x5, /* 1.5 clocks */ 0x2, /* 2.0 clocks */ 0x6, /* 2.5 clocks */ 0x3 /* 3.0 clocks */ }; caslat = mode_caslat_table[cas_latency - 1]; } else { printf("Warning: unknown cas_latency %d\n", cas_latency); } #elif defined(CONFIG_FSL_DDR2) caslat = cas_latency; #else #error "Fix the mode CAS Latency for DDR3" #endif bt = 0; switch (popts->burst_length) { case 4: bl = 2; break; case 8: bl = 3; break; default: printf("Error: invalid burst length of %u specified. " " Defaulting to 4 beats.\n", popts->burst_length); bl = 2; break; } sdmode = (0 | ((mr & 0x3) << 14) | ((pd & 0x1) << 12) | ((wr & 0x7) << 9) | ((dll_res & 0x1) << 8) | ((mode & 0x1) << 7) | ((caslat & 0x7) << 4) | ((bt & 0x1) << 3) | ((bl & 0x7) << 0) ); ddr->ddr_sdram_mode = (0 | ((esdmode & 0xFFFF) << 16) | ((sdmode & 0xFFFF) << 0) ); debug("FSLDDR: ddr_sdram_mode = 0x%08x\n", ddr->ddr_sdram_mode); } /* DDR SDRAM Data Initialization (DDR_DATA_INIT) */ static void set_ddr_data_init(fsl_ddr_cfg_regs_t *ddr) { unsigned int init_value; /* Initialization value */ init_value = 0xDEADBEEF; ddr->ddr_data_init = init_value; } /* * DDR SDRAM Clock Control (DDR_SDRAM_CLK_CNTL) * The old controller on the 8540/60 doesn't have this register. * Hope it's OK to set it (to 0) anyway. */ static void set_ddr_sdram_clk_cntl(fsl_ddr_cfg_regs_t *ddr, const memctl_options_t *popts) { unsigned int clk_adjust; /* Clock adjust */ clk_adjust = popts->clk_adjust; ddr->ddr_sdram_clk_cntl = (clk_adjust & 0xF) << 23; } /* DDR Initialization Address (DDR_INIT_ADDR) */ static void set_ddr_init_addr(fsl_ddr_cfg_regs_t *ddr) { unsigned int init_addr = 0; /* Initialization address */ ddr->ddr_init_addr = init_addr; } /* DDR Initialization Address (DDR_INIT_EXT_ADDR) */ static void set_ddr_init_ext_addr(fsl_ddr_cfg_regs_t *ddr) { unsigned int uia = 0; /* Use initialization address */ unsigned int init_ext_addr = 0; /* Initialization address */ ddr->ddr_init_ext_addr = (0 | ((uia & 0x1) << 31) | (init_ext_addr & 0xF) ); } /* DDR SDRAM Timing Configuration 4 (TIMING_CFG_4) */ static void set_timing_cfg_4(fsl_ddr_cfg_regs_t *ddr) { unsigned int rwt = 0; /* Read-to-write turnaround for same CS */ unsigned int wrt = 0; /* Write-to-read turnaround for same CS */ unsigned int rrt = 0; /* Read-to-read turnaround for same CS */ unsigned int wwt = 0; /* Write-to-write turnaround for same CS */ unsigned int dll_lock = 0; /* DDR SDRAM DLL Lock Time */ ddr->timing_cfg_4 = (0 | ((rwt & 0xf) << 28) | ((wrt & 0xf) << 24) | ((rrt & 0xf) << 20) | ((wwt & 0xf) << 16) | (dll_lock & 0x3) ); debug("FSLDDR: timing_cfg_4 = 0x%08x\n", ddr->timing_cfg_4); } /* DDR SDRAM Timing Configuration 5 (TIMING_CFG_5) */ static void set_timing_cfg_5(fsl_ddr_cfg_regs_t *ddr) { unsigned int rodt_on = 0; /* Read to ODT on */ unsigned int rodt_off = 0; /* Read to ODT off */ unsigned int wodt_on = 0; /* Write to ODT on */ unsigned int wodt_off = 0; /* Write to ODT off */ ddr->timing_cfg_5 = (0 | ((rodt_on & 0xf) << 24) | ((rodt_off & 0xf) << 20) | ((wodt_on & 0xf) << 12) | ((wodt_off & 0xf) << 8) ); debug("FSLDDR: timing_cfg_5 = 0x%08x\n", ddr->timing_cfg_5); } /* DDR ZQ Calibration Control (DDR_ZQ_CNTL) */ static void set_ddr_zq_cntl(fsl_ddr_cfg_regs_t *ddr) { unsigned int zq_en = 0; /* ZQ Calibration Enable */ unsigned int zqinit = 0;/* POR ZQ Calibration Time (tZQinit) */ /* Normal Operation Full Calibration Time (tZQoper) */ unsigned int zqoper = 0; /* Normal Operation Short Calibration Time (tZQCS) */ unsigned int zqcs = 0; ddr->ddr_zq_cntl = (0 | ((zq_en & 0x1) << 31) | ((zqinit & 0xF) << 24) | ((zqoper & 0xF) << 16) | ((zqcs & 0xF) << 8) ); } /* DDR Write Leveling Control (DDR_WRLVL_CNTL) */ static void set_ddr_wrlvl_cntl(fsl_ddr_cfg_regs_t *ddr) { unsigned int wrlvl_en = 0; /* Write Leveling Enable */ /* * First DQS pulse rising edge after margining mode * is programmed (tWL_MRD) */ unsigned int wrlvl_mrd = 0; /* ODT delay after margining mode is programmed (tWL_ODTEN) */ unsigned int wrlvl_odten = 0; /* DQS/DQS_ delay after margining mode is programmed (tWL_DQSEN) */ unsigned int wrlvl_dqsen = 0; /* WRLVL_SMPL: Write leveling sample time */ unsigned int wrlvl_smpl = 0; /* WRLVL_WLR: Write leveling repeition time */ unsigned int wrlvl_wlr = 0; /* WRLVL_START: Write leveling start time */ unsigned int wrlvl_start = 0; ddr->ddr_wrlvl_cntl = (0 | ((wrlvl_en & 0x1) << 31) | ((wrlvl_mrd & 0x7) << 24) | ((wrlvl_odten & 0x7) << 20) | ((wrlvl_dqsen & 0x7) << 16) | ((wrlvl_smpl & 0xf) << 12) | ((wrlvl_wlr & 0x7) << 8) | ((wrlvl_start & 0xF) << 0) ); } /* DDR Self Refresh Counter (DDR_SR_CNTR) */ static void set_ddr_sr_cntr(fsl_ddr_cfg_regs_t *ddr) { unsigned int sr_it = 0; /* Self Refresh Idle Threshold */ ddr->ddr_sr_cntr = (sr_it & 0xF) << 16; } /* DDR Pre-Drive Conditioning Control (DDR_PD_CNTL) */ static void set_ddr_pd_cntl(fsl_ddr_cfg_regs_t *ddr) { /* Termination value during pre-drive conditioning */ unsigned int tvpd = 0; unsigned int pd_en = 0; /* Pre-Drive Conditioning Enable */ unsigned int pdar = 0; /* Pre-Drive After Read */ unsigned int pdaw = 0; /* Pre-Drive After Write */ unsigned int pd_on = 0; /* Pre-Drive Conditioning On */ unsigned int pd_off = 0; /* Pre-Drive Conditioning Off */ ddr->ddr_pd_cntl = (0 | ((pd_en & 0x1) << 31) | ((tvpd & 0x7) << 28) | ((pdar & 0x7F) << 20) | ((pdaw & 0x7F) << 12) | ((pd_on & 0x1F) << 6) | ((pd_off & 0x1F) << 0) ); } /* DDR SDRAM Register Control Word 1 (DDR_SDRAM_RCW_1) */ static void set_ddr_sdram_rcw_1(fsl_ddr_cfg_regs_t *ddr) { unsigned int rcw0 = 0; /* RCW0: Register Control Word 0 */ unsigned int rcw1 = 0; /* RCW1: Register Control Word 1 */ unsigned int rcw2 = 0; /* RCW2: Register Control Word 2 */ unsigned int rcw3 = 0; /* RCW3: Register Control Word 3 */ unsigned int rcw4 = 0; /* RCW4: Register Control Word 4 */ unsigned int rcw5 = 0; /* RCW5: Register Control Word 5 */ unsigned int rcw6 = 0; /* RCW6: Register Control Word 6 */ unsigned int rcw7 = 0; /* RCW7: Register Control Word 7 */ ddr->ddr_sdram_rcw_1 = (0 | ((rcw0 & 0xF) << 28) | ((rcw1 & 0xF) << 24) | ((rcw2 & 0xF) << 20) | ((rcw3 & 0xF) << 16) | ((rcw4 & 0xF) << 12) | ((rcw5 & 0xF) << 8) | ((rcw6 & 0xF) << 4) | ((rcw7 & 0xF) << 0) ); } /* DDR SDRAM Register Control Word 2 (DDR_SDRAM_RCW_2) */ static void set_ddr_sdram_rcw_2(fsl_ddr_cfg_regs_t *ddr) { unsigned int rcw8 = 0; /* RCW0: Register Control Word 8 */ unsigned int rcw9 = 0; /* RCW1: Register Control Word 9 */ unsigned int rcw10 = 0; /* RCW2: Register Control Word 10 */ unsigned int rcw11 = 0; /* RCW3: Register Control Word 11 */ unsigned int rcw12 = 0; /* RCW4: Register Control Word 12 */ unsigned int rcw13 = 0; /* RCW5: Register Control Word 13 */ unsigned int rcw14 = 0; /* RCW6: Register Control Word 14 */ unsigned int rcw15 = 0; /* RCW7: Register Control Word 15 */ ddr->ddr_sdram_rcw_2 = (0 | ((rcw8 & 0xF) << 28) | ((rcw9 & 0xF) << 24) | ((rcw10 & 0xF) << 20) | ((rcw11 & 0xF) << 16) | ((rcw12 & 0xF) << 12) | ((rcw13 & 0xF) << 8) | ((rcw14 & 0xF) << 4) | ((rcw15 & 0xF) << 0) ); } unsigned int check_fsl_memctl_config_regs(const fsl_ddr_cfg_regs_t *ddr) { unsigned int res = 0; /* * Check that DDR_SDRAM_CFG[RD_EN] and DDR_SDRAM_CFG[2T_EN] are * not set at the same time. */ if (ddr->ddr_sdram_cfg & 0x10000000 && ddr->ddr_sdram_cfg & 0x00008000) { printf("Error: DDR_SDRAM_CFG[RD_EN] and DDR_SDRAM_CFG[2T_EN] " " should not be set at the same time.\n"); res++; } return res; } unsigned int compute_fsl_memctl_config_regs(const memctl_options_t *popts, fsl_ddr_cfg_regs_t *ddr, const common_timing_params_t *common_dimm, const dimm_params_t *dimm_params, unsigned int dbw_cap_adj) { unsigned int i; unsigned int cas_latency; unsigned int additive_latency; memset(ddr, 0, sizeof(fsl_ddr_cfg_regs_t)); if (common_dimm == NULL) { printf("Error: subset DIMM params struct null pointer\n"); return 1; } /* * Process overrides first. * * FIXME: somehow add dereated caslat to this */ cas_latency = (popts->cas_latency_override) ? popts->cas_latency_override_value : common_dimm->lowest_common_SPD_caslat; additive_latency = (popts->additive_latency_override) ? popts->additive_latency_override_value : common_dimm->additive_latency; /* Chip Select Memory Bounds (CSn_BNDS) */ for (i = 0; i < CONFIG_CHIP_SELECTS_PER_CTRL; i++) { phys_size_t sa = 0; phys_size_t ea = 0; if (popts->ba_intlv_ctl && (i > 0) && ((popts->ba_intlv_ctl & 0x60) != FSL_DDR_CS2_CS3 )) { /* Don't set up boundaries for other CS * other than CS0, if bank interleaving * is enabled and not CS2+CS3 interleaved. */ break; } if (dimm_params[i/2].n_ranks == 0) { debug("Skipping setup of CS%u " "because n_ranks on DIMM %u is 0\n", i, i/2); continue; } if (popts->memctl_interleaving && popts->ba_intlv_ctl) { /* * This works superbank 2CS * There are 2 memory controllers configured * identically, memory is interleaved between them, * and each controller uses rank interleaving within * itself. Therefore the starting and ending address * on each controller is twice the amount present on * each controller. */ unsigned long long rank_density = dimm_params[0].capacity; ea = (2 * (rank_density >> dbw_cap_adj)) - 1; } else if (!popts->memctl_interleaving && popts->ba_intlv_ctl) { /* * If memory interleaving between controllers is NOT * enabled, the starting address for each memory * controller is distinct. However, because rank * interleaving is enabled, the starting and ending * addresses of the total memory on that memory * controller needs to be programmed into its * respective CS0_BNDS. */ unsigned long long rank_density = dimm_params[i/2].rank_density; switch (popts->ba_intlv_ctl & FSL_DDR_CS0_CS1_CS2_CS3) { case FSL_DDR_CS0_CS1_CS2_CS3: /* CS0+CS1+CS2+CS3 interleaving, only CS0_CNDS * needs to be set. */ sa = common_dimm->base_address; ea = sa + (4 * (rank_density >> dbw_cap_adj))-1; break; case FSL_DDR_CS0_CS1_AND_CS2_CS3: /* CS0+CS1 and CS2+CS3 interleaving, CS0_CNDS * and CS2_CNDS need to be set. */ if (!(i&1)) { sa = dimm_params[i/2].base_address; ea = sa + (i * (rank_density >> dbw_cap_adj)) - 1; } break; case FSL_DDR_CS0_CS1: /* CS0+CS1 interleaving, CS0_CNDS needs * to be set */ sa = common_dimm->base_address; ea = sa + (2 * (rank_density >> dbw_cap_adj))-1; break; case FSL_DDR_CS2_CS3: /* CS2+CS3 interleaving*/ if (i == 2) { sa = dimm_params[i/2].base_address; ea = sa + (2 * (rank_density >> dbw_cap_adj)) - 1; } break; default: /* No bank(chip-select) interleaving */ break; } } else if (popts->memctl_interleaving && !popts->ba_intlv_ctl) { /* * Only the rank on CS0 of each memory controller may * be used if memory controller interleaving is used * without rank interleaving within each memory * controller. However, the ending address programmed * into each CS0 must be the sum of the amount of * memory in the two CS0 ranks. */ if (i == 0) { unsigned long long rank_density = dimm_params[0].rank_density; ea = (2 * (rank_density >> dbw_cap_adj)) - 1; } } else if (!popts->memctl_interleaving && !popts->ba_intlv_ctl) { /* * No rank interleaving and no memory controller * interleaving. */ unsigned long long rank_density = dimm_params[i/2].rank_density; sa = dimm_params[i/2].base_address; ea = sa + (rank_density >> dbw_cap_adj) - 1; if (i&1) { if ((dimm_params[i/2].n_ranks == 1)) { /* Odd chip select, single-rank dimm */ sa = 0; ea = 0; } else { /* Odd chip select, dual-rank DIMM */ sa += rank_density >> dbw_cap_adj; ea += rank_density >> dbw_cap_adj; } } } sa >>= 24; ea >>= 24; ddr->cs[i].bnds = (0 | ((sa & 0xFFF) << 16) /* starting address MSB */ | ((ea & 0xFFF) << 0) /* ending address MSB */ ); debug("FSLDDR: cs[%d]_bnds = 0x%08x\n", i, ddr->cs[i].bnds); set_csn_config(i, ddr, popts, dimm_params); set_csn_config_2(i, ddr); } #if defined(CONFIG_FSL_DDR2) set_timing_cfg_0(ddr); #endif set_timing_cfg_3(ddr, common_dimm); set_timing_cfg_1(ddr, common_dimm, cas_latency); set_timing_cfg_2(ddr, popts, common_dimm, cas_latency, additive_latency); set_ddr_sdram_cfg(ddr, popts, common_dimm); set_ddr_sdram_cfg_2(ddr, popts); set_ddr_sdram_mode(ddr, popts, common_dimm, cas_latency, additive_latency); set_ddr_sdram_mode_2(ddr); set_ddr_sdram_interval(ddr, popts, common_dimm); set_ddr_data_init(ddr); set_ddr_sdram_clk_cntl(ddr, popts); set_ddr_init_addr(ddr); set_ddr_init_ext_addr(ddr); set_timing_cfg_4(ddr); set_timing_cfg_5(ddr); set_ddr_zq_cntl(ddr); set_ddr_wrlvl_cntl(ddr); set_ddr_pd_cntl(ddr); set_ddr_sr_cntr(ddr); set_ddr_sdram_rcw_1(ddr); set_ddr_sdram_rcw_2(ddr); return check_fsl_memctl_config_regs(ddr); }