/* * Copyright 2008-2012 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 as published by the Free * Software Foundation; either version 2 of the License, or (at your option) * any later version. */ /* * 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" #ifdef CONFIG_MPC83xx #define _DDR_ADDR CONFIG_SYS_MPC83xx_DDR_ADDR #elif defined(CONFIG_MPC85xx) #define _DDR_ADDR CONFIG_SYS_MPC85xx_DDR_ADDR #elif defined(CONFIG_MPC86xx) #define _DDR_ADDR CONFIG_SYS_MPC86xx_DDR_ADDR #else #error "Undefined _DDR_ADDR" #endif u32 fsl_ddr_get_version(void) { ccsr_ddr_t *ddr; u32 ver_major_minor_errata; ddr = (void *)_DDR_ADDR; ver_major_minor_errata = (in_be32(&ddr->ip_rev1) & 0xFFFF) << 8; ver_major_minor_errata |= (in_be32(&ddr->ip_rev2) & 0xFF00) >> 8; return ver_major_minor_errata; } unsigned int picos_to_mclk(unsigned int picos); /* * Determine Rtt value. * * This should likely be either board or controller specific. * * Rtt(nominal) - DDR2: * 0 = Rtt disabled * 1 = 75 ohm * 2 = 150 ohm * 3 = 50 ohm * Rtt(nominal) - DDR3: * 0 = Rtt disabled * 1 = 60 ohm * 2 = 120 ohm * 3 = 40 ohm * 4 = 20 ohm * 5 = 30 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 rtt = 0; #endif return rtt; } /* * compute the CAS write latency according to DDR3 spec * CWL = 5 if tCK >= 2.5ns * 6 if 2.5ns > tCK >= 1.875ns * 7 if 1.875ns > tCK >= 1.5ns * 8 if 1.5ns > tCK >= 1.25ns * 9 if 1.25ns > tCK >= 1.07ns * 10 if 1.07ns > tCK >= 0.935ns * 11 if 0.935ns > tCK >= 0.833ns * 12 if 0.833ns > tCK >= 0.75ns */ static inline unsigned int compute_cas_write_latency(void) { unsigned int cwl; const unsigned int mclk_ps = get_memory_clk_period_ps(); if (mclk_ps >= 2500) cwl = 5; else if (mclk_ps >= 1875) cwl = 6; else if (mclk_ps >= 1500) cwl = 7; else if (mclk_ps >= 1250) cwl = 8; else if (mclk_ps >= 1070) cwl = 9; else if (mclk_ps >= 935) cwl = 10; else if (mclk_ps >= 833) cwl = 11; else if (mclk_ps >= 750) cwl = 12; else { cwl = 12; printf("Warning: CWL is out of range\n"); } return cwl; } /* Chip Select Configuration (CSn_CONFIG) */ static void set_csn_config(int dimm_number, 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 */ int go_config = 0; /* Compute CS_CONFIG only for existing ranks of each DIMM. */ switch (i) { case 0: if (dimm_params[dimm_number].n_ranks > 0) { go_config = 1; /* These fields only available in CS0_CONFIG */ intlv_en = popts->memctl_interleaving; intlv_ctl = popts->memctl_interleaving_mode; } break; case 1: if ((dimm_number == 0 && dimm_params[0].n_ranks > 1) || \ (dimm_number == 1 && dimm_params[1].n_ranks > 0)) go_config = 1; break; case 2: if ((dimm_number == 0 && dimm_params[0].n_ranks > 2) || \ (dimm_number >= 1 && dimm_params[dimm_number].n_ranks > 0)) go_config = 1; break; case 3: if ((dimm_number == 0 && dimm_params[0].n_ranks > 3) || \ (dimm_number == 1 && dimm_params[1].n_ranks > 1) || \ (dimm_number == 3 && dimm_params[3].n_ranks > 0)) go_config = 1; break; default: break; } if (go_config) { unsigned int n_banks_per_sdram_device; cs_n_en = 1; 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[dimm_number].n_banks_per_sdram_device; ba_bits_cs_n = __ilog2(n_banks_per_sdram_device) - 2; row_bits_cs_n = dimm_params[dimm_number].n_row_addr - 12; col_bits_cs_n = dimm_params[dimm_number].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_DDR1) /* * 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, const memctl_options_t *popts) { 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; /* ODT powerdown exit timing (tAXPD). */ unsigned char taxpd_mclk; /* Mode register set cycle time (tMRD). */ unsigned char tmrd_mclk; #ifdef CONFIG_FSL_DDR3 /* * (tXARD and tXARDS). Empirical? * The DDR3 spec has not tXARD, * we use the tXP instead of it. * tXP=max(3nCK, 7.5ns) for DDR3. * spec has not the tAXPD, we use * tAXPD=1, need design to confirm. */ int tXP = max((get_memory_clk_period_ps() * 3), 7500); /* unit=ps */ unsigned int data_rate = get_ddr_freq(0); tmrd_mclk = 4; /* set the turnaround time */ trwt_mclk = 1; if ((data_rate/1000000 > 1150) || (popts->memctl_interleaving)) twrt_mclk = 1; if (popts->dynamic_power == 0) { /* powerdown is not used */ act_pd_exit_mclk = 1; pre_pd_exit_mclk = 1; taxpd_mclk = 1; } else { /* act_pd_exit_mclk = tXARD, see above */ act_pd_exit_mclk = picos_to_mclk(tXP); /* Mode register MR0[A12] is '1' - fast exit */ pre_pd_exit_mclk = act_pd_exit_mclk; taxpd_mclk = 1; } #else /* CONFIG_FSL_DDR2 */ /* * (tXARD and tXARDS). Empirical? * tXARD = 2 for DDR2 * tXP=2 * tAXPD=8 */ act_pd_exit_mclk = 2; pre_pd_exit_mclk = 2; taxpd_mclk = 8; tmrd_mclk = 2; #endif if (popts->trwt_override) trwt_mclk = popts->trwt; 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 & 0xF) << 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, unsigned int cas_latency) { /* 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; /* If the CAS latency more than 8, use the ext mode */ if (cas_latency > 8) ext_caslat = 1; 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 memctl_options_t *popts, 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; /* DDR_SDRAM_MODE doesn't support 9,11,13,15 */ static const u8 wrrec_table[] = { 1, 2, 3, 4, 5, 6, 7, 8, 10, 10, 12, 12, 14, 14, 0, 0}; 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 /* * if the CAS latency more than 8 cycle, * we need set extend bit for it at * TIMING_CFG_3[EXT_CASLAT] */ if (cas_latency > 8) cas_latency -= 8; caslat_ctrl = 2 * cas_latency - 1; #endif refrec_ctrl = picos_to_mclk(common_dimm->tRFC_ps) - 8; wrrec_mclk = picos_to_mclk(common_dimm->tWR_ps); wrrec_mclk = wrrec_table[wrrec_mclk - 1]; if (popts->OTF_burst_chop_en) wrrec_mclk += 2; acttoact_mclk = picos_to_mclk(common_dimm->tRRD_ps); /* * JEDEC has min requirement for tRRD */ #if defined(CONFIG_FSL_DDR3) if (acttoact_mclk < 4) acttoact_mclk = 4; #endif wrtord_mclk = picos_to_mclk(common_dimm->tWTR_ps); /* * JEDEC has some min requirements for tWTR */ #if defined(CONFIG_FSL_DDR2) if (wrtord_mclk < 2) wrtord_mclk = 2; #elif defined(CONFIG_FSL_DDR3) if (wrtord_mclk < 4) wrtord_mclk = 4; #endif if (popts->OTF_burst_chop_en) wrtord_mclk += 2; 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 - 1; #else wr_lat = compute_cas_write_latency(); #endif rd_to_pre = picos_to_mclk(common_dimm->tRTP_ps); /* * JEDEC has some min requirements for tRTP */ #if defined(CONFIG_FSL_DDR2) if (rd_to_pre < 2) rd_to_pre = 2; #elif defined(CONFIG_FSL_DDR3) if (rd_to_pre < 4) rd_to_pre = 4; #endif if (additive_latency) rd_to_pre += additive_latency; if (popts->OTF_burst_chop_en) rd_to_pre += 2; /* according to UM */ 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 & 0xf) << 28) | ((cpo & 0x1f) << 23) | ((wr_lat & 0xf) << 19) | ((rd_to_pre & RD_TO_PRE_MASK) << RD_TO_PRE_SHIFT) | ((wr_data_delay & WR_DATA_DELAY_MASK) << WR_DATA_DELAY_SHIFT) | ((cke_pls & 0x7) << 6) | ((four_act & 0x3f) << 0) ); debug("FSLDDR: timing_cfg_2 = 0x%08x\n", ddr->timing_cfg_2); } /* DDR SDRAM Register Control Word */ static void set_ddr_sdram_rcw(fsl_ddr_cfg_regs_t *ddr, const memctl_options_t *popts, const common_timing_params_t *common_dimm) { if (common_dimm->all_DIMMs_registered && !common_dimm->all_DIMMs_unbuffered) { if (popts->rcw_override) { ddr->ddr_sdram_rcw_1 = popts->rcw_1; ddr->ddr_sdram_rcw_2 = popts->rcw_2; } else { ddr->ddr_sdram_rcw_1 = common_dimm->rcw[0] << 28 | \ common_dimm->rcw[1] << 24 | \ common_dimm->rcw[2] << 20 | \ common_dimm->rcw[3] << 16 | \ common_dimm->rcw[4] << 12 | \ common_dimm->rcw[5] << 8 | \ common_dimm->rcw[6] << 4 | \ common_dimm->rcw[7]; ddr->ddr_sdram_rcw_2 = common_dimm->rcw[8] << 28 | \ common_dimm->rcw[9] << 24 | \ common_dimm->rcw[10] << 20 | \ common_dimm->rcw[11] << 16 | \ common_dimm->rcw[12] << 12 | \ common_dimm->rcw[13] << 8 | \ common_dimm->rcw[14] << 4 | \ common_dimm->rcw[15]; } debug("FSLDDR: ddr_sdram_rcw_1 = 0x%08x\n", ddr->ddr_sdram_rcw_1); debug("FSLDDR: ddr_sdram_rcw_2 = 0x%08x\n", ddr->ddr_sdram_rcw_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 = 0; /* 8-beat burst enable, DDR2 is zero */ 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; } if (common_dimm->all_DIMMs_registered && !common_dimm->all_DIMMs_unbuffered) { rd_en = 1; twoT_en = 0; } else { rd_en = 0; twoT_en = popts->twoT_en; } sdram_type = CONFIG_FSL_SDRAM_TYPE; dyn_pwr = popts->dynamic_power; dbw = popts->data_bus_width; /* 8-beat burst enable DDR-III case * we must clear it when use the on-the-fly mode, * must set it when use the 32-bits bus mode. */ if (sdram_type == SDRAM_TYPE_DDR3) { if (popts->burst_length == DDR_BL8) eight_be = 1; if (popts->burst_length == DDR_OTF) eight_be = 0; if (dbw == 0x1) eight_be = 1; } threeT_en = popts->threeT_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, const unsigned int unq_mrs_en) { 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 = 0; /* 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 */ unsigned int qd_en = 0; /* quad-rank DIMM Enable */ int i; dll_rst_dis = 1; /* Make this configurable */ dqs_cfg = popts->DQS_config; for (i = 0; i < CONFIG_CHIP_SELECTS_PER_CTRL; i++) { if (popts->cs_local_opts[i].odt_rd_cfg || popts->cs_local_opts[i].odt_wr_cfg) { odt_cfg = SDRAM_CFG2_ODT_ONLY_READ; break; } } 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] */ #if defined(CONFIG_FSL_DDR3) obc_cfg = popts->OTF_burst_chop_en; #else obc_cfg = 0; #endif if (popts->registered_dimm_en) { rcw_en = 1; ap_en = popts->ap_en; } else { ap_en = 0; } #if defined(CONFIG_ECC_INIT_VIA_DDRCONTROLLER) /* Use the DDR controller to auto initialize memory. */ d_init = popts->ECC_init_using_memctl; 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 #if defined(CONFIG_FSL_DDR3) md_en = popts->mirrored_dimm; #endif qd_en = popts->quad_rank_present ? 1 : 0; 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) | (qd_en << 9) | (unq_mrs_en << 8) | ((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, const memctl_options_t *popts, const unsigned int unq_mrs_en) { unsigned short esdmode2 = 0; /* Extended SDRAM mode 2 */ unsigned short esdmode3 = 0; /* Extended SDRAM mode 3 */ #if defined(CONFIG_FSL_DDR3) int i; unsigned int rtt_wr = 0; /* Rtt_WR - dynamic ODT off */ unsigned int srt = 0; /* self-refresh temerature, normal range */ unsigned int asr = 0; /* auto self-refresh disable */ unsigned int cwl = compute_cas_write_latency() - 5; unsigned int pasr = 0; /* partial array self refresh disable */ if (popts->rtt_override) rtt_wr = popts->rtt_wr_override_value; else rtt_wr = popts->cs_local_opts[0].odt_rtt_wr; esdmode2 = (0 | ((rtt_wr & 0x3) << 9) | ((srt & 0x1) << 7) | ((asr & 0x1) << 6) | ((cwl & 0x7) << 3) | ((pasr & 0x7) << 0)); #endif 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); #ifdef CONFIG_FSL_DDR3 if (unq_mrs_en) { /* unique mode registers are supported */ for (i = 1; i < CONFIG_CHIP_SELECTS_PER_CTRL; i++) { if (popts->rtt_override) rtt_wr = popts->rtt_wr_override_value; else rtt_wr = popts->cs_local_opts[i].odt_rtt_wr; esdmode2 &= 0xF9FF; /* clear bit 10, 9 */ esdmode2 |= (rtt_wr & 0x3) << 9; switch (i) { case 1: ddr->ddr_sdram_mode_4 = (0 | ((esdmode2 & 0xFFFF) << 16) | ((esdmode3 & 0xFFFF) << 0) ); break; case 2: ddr->ddr_sdram_mode_6 = (0 | ((esdmode2 & 0xFFFF) << 16) | ((esdmode3 & 0xFFFF) << 0) ); break; case 3: ddr->ddr_sdram_mode_8 = (0 | ((esdmode2 & 0xFFFF) << 16) | ((esdmode3 & 0xFFFF) << 0) ); break; } } debug("FSLDDR: ddr_sdram_mode_4 = 0x%08x\n", ddr->ddr_sdram_mode_4); debug("FSLDDR: ddr_sdram_mode_6 = 0x%08x\n", ddr->ddr_sdram_mode_6); debug("FSLDDR: ddr_sdram_mode_8 = 0x%08x\n", ddr->ddr_sdram_mode_8); } #endif } /* 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); } #if defined(CONFIG_FSL_DDR3) /* 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, const unsigned int unq_mrs_en) { unsigned short esdmode; /* Extended SDRAM mode */ unsigned short sdmode; /* SDRAM mode */ /* Mode Register - MR1 */ unsigned int qoff = 0; /* Output buffer enable 0=yes, 1=no */ unsigned int tdqs_en = 0; /* TDQS Enable: 0=no, 1=yes */ unsigned int rtt; unsigned int wrlvl_en = 0; /* Write level enable: 0=no, 1=yes */ unsigned int al = 0; /* Posted CAS# additive latency (AL) */ unsigned int dic = 0; /* Output driver impedance, 40ohm */ unsigned int dll_en = 0; /* DLL Enable 0=Enable (Normal), 1=Disable (Test/Debug) */ /* Mode Register - MR0 */ unsigned int dll_on; /* DLL control for precharge PD, 0=off, 1=on */ unsigned int wr = 0; /* Write Recovery */ unsigned int dll_rst; /* DLL Reset */ unsigned int mode; /* Normal=0 or Test=1 */ unsigned int caslat = 4;/* CAS# latency, default set as 6 cycles */ /* BT: Burst Type (0=Nibble Sequential, 1=Interleaved) */ unsigned int bt; unsigned int bl; /* BL: Burst Length */ unsigned int wr_mclk; /* * DDR_SDRAM_MODE doesn't support 9,11,13,15 * Please refer JEDEC Standard No. 79-3E for Mode Register MR0 * for this table */ static const u8 wr_table[] = {1, 2, 3, 4, 5, 5, 6, 6, 7, 7, 0, 0}; const unsigned int mclk_ps = get_memory_clk_period_ps(); int i; if (popts->rtt_override) rtt = popts->rtt_override_value; else rtt = popts->cs_local_opts[0].odt_rtt_norm; if (additive_latency == (cas_latency - 1)) al = 1; if (additive_latency == (cas_latency - 2)) al = 2; if (popts->quad_rank_present) dic = 1; /* output driver impedance 240/7 ohm */ /* * The esdmode value will also be used for writing * MR1 during write leveling for DDR3, although the * bits specifically related to the write leveling * scheme will be handled automatically by the DDR * controller. so we set the wrlvl_en = 0 here. */ esdmode = (0 | ((qoff & 0x1) << 12) | ((tdqs_en & 0x1) << 11) | ((rtt & 0x4) << 7) /* rtt field is split */ | ((wrlvl_en & 0x1) << 7) | ((rtt & 0x2) << 5) /* rtt field is split */ | ((dic & 0x2) << 4) /* DIC field is split */ | ((al & 0x3) << 3) | ((rtt & 0x1) << 2) /* rtt field is split */ | ((dic & 0x1) << 1) /* DIC field is split */ | ((dll_en & 0x1) << 0) ); /* * DLL control for precharge PD * 0=slow exit DLL off (tXPDLL) * 1=fast exit DLL on (tXP) */ dll_on = 1; wr_mclk = (common_dimm->tWR_ps + mclk_ps - 1) / mclk_ps; if (wr_mclk <= 16) { wr = wr_table[wr_mclk - 5]; } else { printf("Error: unsupported write recovery for mode register " "wr_mclk = %d\n", wr_mclk); } dll_rst = 0; /* dll no reset */ mode = 0; /* normal mode */ /* look up table to get the cas latency bits */ if (cas_latency >= 5 && cas_latency <= 16) { unsigned char cas_latency_table[] = { 0x2, /* 5 clocks */ 0x4, /* 6 clocks */ 0x6, /* 7 clocks */ 0x8, /* 8 clocks */ 0xa, /* 9 clocks */ 0xc, /* 10 clocks */ 0xe, /* 11 clocks */ 0x1, /* 12 clocks */ 0x3, /* 13 clocks */ 0x5, /* 14 clocks */ 0x7, /* 15 clocks */ 0x9, /* 16 clocks */ }; caslat = cas_latency_table[cas_latency - 5]; } else { printf("Error: unsupported cas latency for mode register\n"); } bt = 0; /* Nibble sequential */ switch (popts->burst_length) { case DDR_BL8: bl = 0; break; case DDR_OTF: bl = 1; break; case DDR_BC4: bl = 2; break; default: printf("Error: invalid burst length of %u specified. " " Defaulting to on-the-fly BC4 or BL8 beats.\n", popts->burst_length); bl = 1; break; } sdmode = (0 | ((dll_on & 0x1) << 12) | ((wr & 0x7) << 9) | ((dll_rst & 0x1) << 8) | ((mode & 0x1) << 7) | (((caslat >> 1) & 0x7) << 4) | ((bt & 0x1) << 3) | ((caslat & 1) << 2) | ((bl & 0x3) << 0) ); ddr->ddr_sdram_mode = (0 | ((esdmode & 0xFFFF) << 16) | ((sdmode & 0xFFFF) << 0) ); debug("FSLDDR: ddr_sdram_mode = 0x%08x\n", ddr->ddr_sdram_mode); if (unq_mrs_en) { /* unique mode registers are supported */ for (i = 1; i < CONFIG_CHIP_SELECTS_PER_CTRL; i++) { if (popts->rtt_override) rtt = popts->rtt_override_value; else rtt = popts->cs_local_opts[i].odt_rtt_norm; esdmode &= 0xFDBB; /* clear bit 9,6,2 */ esdmode |= (0 | ((rtt & 0x4) << 7) /* rtt field is split */ | ((rtt & 0x2) << 5) /* rtt field is split */ | ((rtt & 0x1) << 2) /* rtt field is split */ ); switch (i) { case 1: ddr->ddr_sdram_mode_3 = (0 | ((esdmode & 0xFFFF) << 16) | ((sdmode & 0xFFFF) << 0) ); break; case 2: ddr->ddr_sdram_mode_5 = (0 | ((esdmode & 0xFFFF) << 16) | ((sdmode & 0xFFFF) << 0) ); break; case 3: ddr->ddr_sdram_mode_7 = (0 | ((esdmode & 0xFFFF) << 16) | ((sdmode & 0xFFFF) << 0) ); break; } } debug("FSLDDR: ddr_sdram_mode_3 = 0x%08x\n", ddr->ddr_sdram_mode_3); debug("FSLDDR: ddr_sdram_mode_5 = 0x%08x\n", ddr->ddr_sdram_mode_5); debug("FSLDDR: ddr_sdram_mode_5 = 0x%08x\n", ddr->ddr_sdram_mode_5); } } #else /* !CONFIG_FSL_DDR3 */ /* 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, const unsigned int unq_mrs_en) { 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 dqs_en = !popts->DQS_config; 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; #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; #endif bt = 0; switch (popts->burst_length) { case DDR_BL4: bl = 2; break; case DDR_BL8: 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); } #endif /* 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; debug("FSLDDR: clk_cntl = 0x%08x\n", ddr->ddr_sdram_clk_cntl); } /* 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, const memctl_options_t *popts) { 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 */ #if defined(CONFIG_FSL_DDR3) if (popts->burst_length == DDR_BL8) { /* We set BL/2 for fixed BL8 */ rrt = 0; /* BL/2 clocks */ wwt = 0; /* BL/2 clocks */ } else { /* We need to set BL/2 + 2 to BC4 and OTF */ rrt = 2; /* BL/2 + 2 clocks */ wwt = 2; /* BL/2 + 2 clocks */ } dll_lock = 1; /* tDLLK = 512 clocks from spec */ #endif 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 cas_latency) { 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 */ #if defined(CONFIG_FSL_DDR3) /* rodt_on = timing_cfg_1[caslat] - timing_cfg_2[wrlat] + 1 */ rodt_on = cas_latency - ((ddr->timing_cfg_2 & 0x00780000) >> 19) + 1; rodt_off = 4; /* 4 clocks */ wodt_on = 1; /* 1 clocks */ wodt_off = 4; /* 4 clocks */ #endif ddr->timing_cfg_5 = (0 | ((rodt_on & 0x1f) << 24) | ((rodt_off & 0x7) << 20) | ((wodt_on & 0x1f) << 12) | ((wodt_off & 0x7) << 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) { 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; if (zq_en) { zqinit = 9; /* 512 clocks */ zqoper = 8; /* 256 clocks */ zqcs = 6; /* 64 clocks */ } ddr->ddr_zq_cntl = (0 | ((zq_en & 0x1) << 31) | ((zqinit & 0xF) << 24) | ((zqoper & 0xF) << 16) | ((zqcs & 0xF) << 8) ); debug("FSLDDR: zq_cntl = 0x%08x\n", ddr->ddr_zq_cntl); } /* DDR Write Leveling Control (DDR_WRLVL_CNTL) */ static void set_ddr_wrlvl_cntl(fsl_ddr_cfg_regs_t *ddr, unsigned int wrlvl_en, const memctl_options_t *popts) { /* * 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; /* suggest enable write leveling for DDR3 due to fly-by topology */ if (wrlvl_en) { /* tWL_MRD min = 40 nCK, we set it 64 */ wrlvl_mrd = 0x6; /* tWL_ODTEN 128 */ wrlvl_odten = 0x7; /* tWL_DQSEN min = 25 nCK, we set it 32 */ wrlvl_dqsen = 0x5; /* * Write leveling sample time at least need 6 clocks * higher than tWLO to allow enough time for progagation * delay and sampling the prime data bits. */ wrlvl_smpl = 0xf; /* * Write leveling repetition time * at least tWLO + 6 clocks clocks * we set it 64 */ wrlvl_wlr = 0x6; /* * Write leveling start time * The value use for the DQS_ADJUST for the first sample * when write leveling is enabled. It probably needs to be * overriden per platform. */ wrlvl_start = 0x8; /* * Override the write leveling sample and start time * according to specific board */ if (popts->wrlvl_override) { wrlvl_smpl = popts->wrlvl_sample; wrlvl_start = popts->wrlvl_start; } } 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 & 0x1F) << 0) ); debug("FSLDDR: wrlvl_cntl = 0x%08x\n", ddr->ddr_wrlvl_cntl); } /* DDR Self Refresh Counter (DDR_SR_CNTR) */ static void set_ddr_sr_cntr(fsl_ddr_cfg_regs_t *ddr, unsigned int sr_it) { /* Self Refresh Idle Threshold */ ddr->ddr_sr_cntr = (sr_it & 0xF) << 16; } static void set_ddr_eor(fsl_ddr_cfg_regs_t *ddr, const memctl_options_t *popts) { if (popts->addr_hash) { ddr->ddr_eor = 0x40000000; /* address hash enable */ puts("Address hashing enabled.\n"); } } static void set_ddr_cdr1(fsl_ddr_cfg_regs_t *ddr, const memctl_options_t *popts) { ddr->ddr_cdr1 = popts->ddr_cdr1; debug("FSLDDR: ddr_cdr1 = 0x%08x\n", ddr->ddr_cdr1); } 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 size_only) { unsigned int i; unsigned int cas_latency; unsigned int additive_latency; unsigned int sr_it; unsigned int zq_en; unsigned int wrlvl_en; unsigned int ip_rev = 0; unsigned int unq_mrs_en = 0; int cs_en = 1; 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; sr_it = (popts->auto_self_refresh_en) ? popts->sr_it : 0; /* ZQ calibration */ zq_en = (popts->zq_en) ? 1 : 0; /* write leveling */ wrlvl_en = (popts->wrlvl_en) ? 1 : 0; /* Chip Select Memory Bounds (CSn_BNDS) */ for (i = 0; i < CONFIG_CHIP_SELECTS_PER_CTRL; i++) { unsigned long long ea = 0, sa = 0; unsigned int cs_per_dimm = CONFIG_CHIP_SELECTS_PER_CTRL / CONFIG_DIMM_SLOTS_PER_CTLR; unsigned int dimm_number = i / cs_per_dimm; unsigned long long rank_density = dimm_params[dimm_number].rank_density; if (((i == 1) && (popts->ba_intlv_ctl & FSL_DDR_CS0_CS1)) || ((i == 2) && (popts->ba_intlv_ctl & 0x04)) || ((i == 3) && (popts->ba_intlv_ctl & FSL_DDR_CS2_CS3))) { /* * Don't set up boundaries for unused CS * cs1 for cs0_cs1, cs0_cs1_and_cs2_cs3, cs0_cs1_cs2_cs3 * cs2 for cs0_cs1_cs2_cs3 * cs3 for cs2_cs3, cs0_cs1_and_cs2_cs3, cs0_cs1_cs2_cs3 * But we need to set the ODT_RD_CFG and * ODT_WR_CFG for CS1_CONFIG here. */ set_csn_config(dimm_number, i, ddr, popts, dimm_params); continue; } if (dimm_params[dimm_number].n_ranks == 0) { debug("Skipping setup of CS%u " "because n_ranks on DIMM %u is 0\n", i, dimm_number); continue; } if (popts->memctl_interleaving && popts->ba_intlv_ctl) { /* * This works superbank 2CS * There are 2 or more 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. If any CS is not included in the * interleaving, the memory on that CS is not accssible * and the total memory size is reduced. The CS is also * disabled. */ unsigned long long ctlr_density = 0; switch (popts->ba_intlv_ctl & FSL_DDR_CS0_CS1_CS2_CS3) { case FSL_DDR_CS0_CS1: case FSL_DDR_CS0_CS1_AND_CS2_CS3: ctlr_density = dimm_params[0].rank_density * 2; if (i > 1) cs_en = 0; break; case FSL_DDR_CS2_CS3: ctlr_density = dimm_params[0].rank_density; if (i > 0) cs_en = 0; break; case FSL_DDR_CS0_CS1_CS2_CS3: /* * The four CS interleaving should have been verified by * populate_memctl_options() */ ctlr_density = dimm_params[0].rank_density * 4; break; default: break; } ea = (CONFIG_NUM_DDR_CONTROLLERS * (ctlr_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. */ 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 == 2) && (dimm_number == 0)) { sa = dimm_params[dimm_number].base_address + 2 * (rank_density >> dbw_cap_adj); ea = sa + 2 * (rank_density >> dbw_cap_adj) - 1; } else { sa = dimm_params[dimm_number].base_address; ea = sa + (2 * (rank_density >> dbw_cap_adj)) - 1; } break; case FSL_DDR_CS0_CS1: /* CS0+CS1 interleaving, CS0_CNDS needs * to be set */ if (dimm_params[dimm_number].n_ranks > (i % cs_per_dimm)) { sa = dimm_params[dimm_number].base_address; ea = sa + (rank_density >> dbw_cap_adj) - 1; sa += (i % cs_per_dimm) * (rank_density >> dbw_cap_adj); ea += (i % cs_per_dimm) * (rank_density >> dbw_cap_adj); } else { sa = 0; ea = 0; } if (i == 0) ea += (rank_density >> dbw_cap_adj); break; case FSL_DDR_CS2_CS3: /* CS2+CS3 interleaving*/ if (dimm_params[dimm_number].n_ranks > (i % cs_per_dimm)) { sa = dimm_params[dimm_number].base_address; ea = sa + (rank_density >> dbw_cap_adj) - 1; sa += (i % cs_per_dimm) * (rank_density >> dbw_cap_adj); ea += (i % cs_per_dimm) * (rank_density >> dbw_cap_adj); } else { sa = 0; ea = 0; } if (i == 2) ea += (rank_density >> dbw_cap_adj); 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) { 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. */ sa = dimm_params[dimm_number].base_address; ea = sa + (rank_density >> dbw_cap_adj) - 1; if (dimm_params[dimm_number].n_ranks > (i % cs_per_dimm)) { sa += (i % cs_per_dimm) * (rank_density >> dbw_cap_adj); ea += (i % cs_per_dimm) * (rank_density >> dbw_cap_adj); } else { sa = 0; ea = 0; } } 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); if (cs_en) { set_csn_config(dimm_number, i, ddr, popts, dimm_params); set_csn_config_2(i, ddr); } else debug("CS%d is disabled.\n", i); } /* * In the case we only need to compute the ddr sdram size, we only need * to set csn registers, so return from here. */ if (size_only) return 0; set_ddr_eor(ddr, popts); #if !defined(CONFIG_FSL_DDR1) set_timing_cfg_0(ddr, popts); #endif set_timing_cfg_3(ddr, common_dimm, cas_latency); set_timing_cfg_1(ddr, popts, common_dimm, cas_latency); set_timing_cfg_2(ddr, popts, common_dimm, cas_latency, additive_latency); set_ddr_cdr1(ddr, popts); set_ddr_sdram_cfg(ddr, popts, common_dimm); ip_rev = fsl_ddr_get_version(); if (ip_rev > 0x40400) unq_mrs_en = 1; set_ddr_sdram_cfg_2(ddr, popts, unq_mrs_en); set_ddr_sdram_mode(ddr, popts, common_dimm, cas_latency, additive_latency, unq_mrs_en); set_ddr_sdram_mode_2(ddr, popts, unq_mrs_en); 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, popts); set_timing_cfg_5(ddr, cas_latency); set_ddr_zq_cntl(ddr, zq_en); set_ddr_wrlvl_cntl(ddr, wrlvl_en, popts); set_ddr_sr_cntr(ddr, sr_it); set_ddr_sdram_rcw(ddr, popts, common_dimm); return check_fsl_memctl_config_regs(ddr); }