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u-boot/drivers/ddr/fsl/ctrl_regs.c

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/*
* Copyright 2008-2014 Freescale Semiconductor, Inc.
*
* SPDX-License-Identifier: GPL-2.0+
*/
/*
* Generic driver for Freescale DDR/DDR2/DDR3/DDR4 memory controller.
* Based on code from spd_sdram.c
* Author: James Yang [at freescale.com]
*/
#include <common.h>
#include <fsl_ddr_sdram.h>
#include <fsl_errata.h>
#include <fsl_ddr.h>
#include <fsl_immap.h>
#include <asm/io.h>
/*
* 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_SYS_FSL_DDR1)
rtt = 0;
#elif defined(CONFIG_SYS_FSL_DDR2)
rtt = 3;
#else
rtt = 0;
#endif
return rtt;
}
#ifdef CONFIG_SYS_FSL_DDR4
/*
* compute CAS write latency according to DDR4 spec
* CWL = 9 for <= 1600MT/s
* 10 for <= 1866MT/s
* 11 for <= 2133MT/s
* 12 for <= 2400MT/s
* 14 for <= 2667MT/s
* 16 for <= 2933MT/s
* 18 for higher
*/
static inline unsigned int compute_cas_write_latency(
const unsigned int ctrl_num)
{
unsigned int cwl;
const unsigned int mclk_ps = get_memory_clk_period_ps(ctrl_num);
if (mclk_ps >= 1250)
cwl = 9;
else if (mclk_ps >= 1070)
cwl = 10;
else if (mclk_ps >= 935)
cwl = 11;
else if (mclk_ps >= 833)
cwl = 12;
else if (mclk_ps >= 750)
cwl = 14;
else if (mclk_ps >= 681)
cwl = 16;
else
cwl = 18;
return cwl;
}
#else
/*
* 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(
const unsigned int ctrl_num)
{
unsigned int cwl;
const unsigned int mclk_ps = get_memory_clk_period_ps(ctrl_num);
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;
}
#endif
/* 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;
#ifdef CONFIG_SYS_FSL_DDR4
unsigned int bg_bits_cs_n = 0; /* Num of bank group bits */
#else
unsigned int n_banks_per_sdram_device;
#endif
/* 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 */
if (!popts->memctl_interleaving)
break;
switch (popts->memctl_interleaving_mode) {
case FSL_DDR_256B_INTERLEAVING:
case FSL_DDR_CACHE_LINE_INTERLEAVING:
case FSL_DDR_PAGE_INTERLEAVING:
case FSL_DDR_BANK_INTERLEAVING:
case FSL_DDR_SUPERBANK_INTERLEAVING:
intlv_en = popts->memctl_interleaving;
intlv_ctl = popts->memctl_interleaving_mode;
break;
default:
break;
}
}
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) {
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;
#ifdef CONFIG_SYS_FSL_DDR4
ba_bits_cs_n = dimm_params[dimm_number].bank_addr_bits;
bg_bits_cs_n = dimm_params[dimm_number].bank_group_bits;
#else
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;
#endif
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)
#ifdef CONFIG_SYS_FSL_DDR4
| ((bg_bits_cs_n & 0x3) << 4)
#endif
| ((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_SYS_FSL_DDR1)
/*
* Check DIMM configuration, return 2 if quad-rank or two dual-rank
* Return 1 if other two slots configuration. Return 0 if single slot.
*/
static inline int avoid_odt_overlap(const dimm_params_t *dimm_params)
{
#if CONFIG_DIMM_SLOTS_PER_CTLR == 1
if (dimm_params[0].n_ranks == 4)
return 2;
#endif
#if CONFIG_DIMM_SLOTS_PER_CTLR == 2
if ((dimm_params[0].n_ranks == 2) &&
(dimm_params[1].n_ranks == 2))
return 2;
#ifdef CONFIG_FSL_DDR_FIRST_SLOT_QUAD_CAPABLE
if (dimm_params[0].n_ranks == 4)
return 2;
#endif
if ((dimm_params[0].n_ranks != 0) &&
(dimm_params[2].n_ranks != 0))
return 1;
#endif
return 0;
}
/*
* 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(const unsigned int ctrl_num,
fsl_ddr_cfg_regs_t *ddr,
const memctl_options_t *popts,
const dimm_params_t *dimm_params)
{
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 = 0;
/* Mode register set cycle time (tMRD). */
unsigned char tmrd_mclk;
#if defined(CONFIG_SYS_FSL_DDR4) || defined(CONFIG_SYS_FSL_DDR3)
const unsigned int mclk_ps = get_memory_clk_period_ps(ctrl_num);
#endif
#ifdef CONFIG_SYS_FSL_DDR4
/* tXP=max(4nCK, 6ns) */
int txp = max((int)mclk_ps * 4, 6000); /* unit=ps */
unsigned int data_rate = get_ddr_freq(ctrl_num);
/* for faster clock, need more time for data setup */
trwt_mclk = (data_rate/1000000 > 1900) ? 3 : 2;
/*
* for single quad-rank DIMM and two-slot DIMMs
* to avoid ODT overlap
*/
switch (avoid_odt_overlap(dimm_params)) {
case 2:
twrt_mclk = 2;
twwt_mclk = 2;
trrt_mclk = 2;
break;
default:
twrt_mclk = 1;
twwt_mclk = 1;
trrt_mclk = 0;
break;
}
act_pd_exit_mclk = picos_to_mclk(ctrl_num, txp);
pre_pd_exit_mclk = act_pd_exit_mclk;
/*
* MRS_CYC = max(tMRD, tMOD)
* tMRD = 8nCK, tMOD = max(24nCK, 15ns)
*/
tmrd_mclk = max(24U, picos_to_mclk(ctrl_num, 15000));
#elif defined(CONFIG_SYS_FSL_DDR3)
unsigned int data_rate = get_ddr_freq(ctrl_num);
int txp;
unsigned int ip_rev;
int odt_overlap;
/*
* (tXARD and tXARDS). Empirical?
* The DDR3 spec has not tXARD,
* we use the tXP instead of it.
* tXP=max(3nCK, 7.5ns) for DDR3-800, 1066
* max(3nCK, 6ns) for DDR3-1333, 1600, 1866, 2133
* spec has not the tAXPD, we use
* tAXPD=1, need design to confirm.
*/
txp = max((int)mclk_ps * 3, (mclk_ps > 1540 ? 7500 : 6000));
ip_rev = fsl_ddr_get_version(ctrl_num);
if (ip_rev >= 0x40700) {
/*
* MRS_CYC = max(tMRD, tMOD)
* tMRD = 4nCK (8nCK for RDIMM)
* tMOD = max(12nCK, 15ns)
*/
tmrd_mclk = max((unsigned int)12,
picos_to_mclk(ctrl_num, 15000));
} else {
/*
* MRS_CYC = tMRD
* tMRD = 4nCK (8nCK for RDIMM)
*/
if (popts->registered_dimm_en)
tmrd_mclk = 8;
else
tmrd_mclk = 4;
}
/* set the turnaround time */
/*
* for single quad-rank DIMM and two-slot DIMMs
* to avoid ODT overlap
*/
odt_overlap = avoid_odt_overlap(dimm_params);
switch (odt_overlap) {
case 2:
twwt_mclk = 2;
trrt_mclk = 1;
break;
case 1:
twwt_mclk = 1;
trrt_mclk = 0;
break;
default:
break;
}
/* for faster clock, need more time for data setup */
trwt_mclk = (data_rate/1000000 > 1800) ? 2 : 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(ctrl_num, txp);
/* Mode register MR0[A12] is '1' - fast exit */
pre_pd_exit_mclk = act_pd_exit_mclk;
taxpd_mclk = 1;
}
#else /* CONFIG_SYS_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 & 0xf) << 20) /* ACT_PD_EXIT */
| ((pre_pd_exit_mclk & 0xF) << 16) /* PRE_PD_EXIT */
| ((taxpd_mclk & 0xf) << 8) /* ODT_PD_EXIT */
| ((tmrd_mclk & 0x1f) << 0) /* MRS_CYC */
);
debug("FSLDDR: timing_cfg_0 = 0x%08x\n", ddr->timing_cfg_0);
}
#endif /* !defined(CONFIG_SYS_FSL_DDR1) */
/* DDR SDRAM Timing Configuration 3 (TIMING_CFG_3) */
static void set_timing_cfg_3(const unsigned int ctrl_num,
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)
{
/* Extended precharge to activate interval (tRP) */
unsigned int ext_pretoact = 0;
/* Extended Activate to precharge interval (tRAS) */
unsigned int ext_acttopre = 0;
/* Extended activate to read/write interval (tRCD) */
unsigned int ext_acttorw = 0;
/* Extended refresh recovery time (tRFC) */
unsigned int ext_refrec;
/* Extended MCAS latency from READ cmd */
unsigned int ext_caslat = 0;
/* Extended additive latency */
unsigned int ext_add_lat = 0;
/* Extended last data to precharge interval (tWR) */
unsigned int ext_wrrec = 0;
/* Control Adjust */
unsigned int cntl_adj = 0;
ext_pretoact = picos_to_mclk(ctrl_num, common_dimm->trp_ps) >> 4;
ext_acttopre = picos_to_mclk(ctrl_num, common_dimm->tras_ps) >> 4;
ext_acttorw = picos_to_mclk(ctrl_num, common_dimm->trcd_ps) >> 4;
ext_caslat = (2 * cas_latency - 1) >> 4;
ext_add_lat = additive_latency >> 4;
#ifdef CONFIG_SYS_FSL_DDR4
ext_refrec = (picos_to_mclk(ctrl_num, common_dimm->trfc1_ps) - 8) >> 4;
#else
ext_refrec = (picos_to_mclk(ctrl_num, common_dimm->trfc_ps) - 8) >> 4;
/* ext_wrrec only deals with 16 clock and above, or 14 with OTF */
#endif
ext_wrrec = (picos_to_mclk(ctrl_num, common_dimm->twr_ps) +
(popts->otf_burst_chop_en ? 2 : 0)) >> 4;
ddr->timing_cfg_3 = (0
| ((ext_pretoact & 0x1) << 28)
| ((ext_acttopre & 0x3) << 24)
| ((ext_acttorw & 0x1) << 22)
| ((ext_refrec & 0x1F) << 16)
| ((ext_caslat & 0x3) << 12)
| ((ext_add_lat & 0x1) << 10)
| ((ext_wrrec & 0x1) << 8)
| ((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(const unsigned int ctrl_num,
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;
#ifdef CONFIG_SYS_FSL_DDR4
/* DDR4 supports 10, 12, 14, 16, 18, 20, 24 */
static const u8 wrrec_table[] = {
10, 10, 10, 10, 10,
10, 10, 10, 10, 10,
12, 12, 14, 14, 16,
16, 18, 18, 20, 20,
24, 24, 24, 24};
#else
/* 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};
#endif
pretoact_mclk = picos_to_mclk(ctrl_num, common_dimm->trp_ps);
acttopre_mclk = picos_to_mclk(ctrl_num, common_dimm->tras_ps);
acttorw_mclk = picos_to_mclk(ctrl_num, 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_SYS_FSL_DDR1)
caslat_ctrl = (cas_latency + 1) & 0x07;
#elif defined(CONFIG_SYS_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 (fsl_ddr_get_version(ctrl_num) <= 0x40400)
caslat_ctrl = 2 * cas_latency - 1;
else
caslat_ctrl = (cas_latency - 1) << 1;
#endif
#ifdef CONFIG_SYS_FSL_DDR4
refrec_ctrl = picos_to_mclk(ctrl_num, common_dimm->trfc1_ps) - 8;
wrrec_mclk = picos_to_mclk(ctrl_num, common_dimm->twr_ps);
acttoact_mclk = max(picos_to_mclk(ctrl_num, common_dimm->trrds_ps), 4U);
wrtord_mclk = max(2U, picos_to_mclk(ctrl_num, 2500));
if ((wrrec_mclk < 1) || (wrrec_mclk > 24))
printf("Error: WRREC doesn't support %d clocks\n", wrrec_mclk);
else
wrrec_mclk = wrrec_table[wrrec_mclk - 1];
#else
refrec_ctrl = picos_to_mclk(ctrl_num, common_dimm->trfc_ps) - 8;
wrrec_mclk = picos_to_mclk(ctrl_num, common_dimm->twr_ps);
acttoact_mclk = picos_to_mclk(ctrl_num, common_dimm->trrd_ps);
wrtord_mclk = picos_to_mclk(ctrl_num, common_dimm->twtr_ps);
if ((wrrec_mclk < 1) || (wrrec_mclk > 16))
printf("Error: WRREC doesn't support %d clocks\n", wrrec_mclk);
else
wrrec_mclk = wrrec_table[wrrec_mclk - 1];
#endif
if (popts->otf_burst_chop_en)
wrrec_mclk += 2;
/*
* JEDEC has min requirement for tRRD
*/
#if defined(CONFIG_SYS_FSL_DDR3)
if (acttoact_mclk < 4)
acttoact_mclk = 4;
#endif
/*
* JEDEC has some min requirements for tWTR
*/
#if defined(CONFIG_SYS_FSL_DDR2)
if (wrtord_mclk < 2)
wrtord_mclk = 2;
#elif defined(CONFIG_SYS_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 & 0x0F) << 4)
| ((wrtord_mclk & 0x0F) << 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(const unsigned int ctrl_num,
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;
#ifdef CONFIG_SYS_FSL_DDR3
const unsigned int mclk_ps = get_memory_clk_period_ps(ctrl_num);
#endif
/* FIXME add check that this must be less than acttorw_mclk */
add_lat_mclk = additive_latency;
cpo = popts->cpo_override;
#if defined(CONFIG_SYS_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_SYS_FSL_DDR2)
wr_lat = cas_latency - 1;
#else
wr_lat = compute_cas_write_latency(ctrl_num);
#endif
#ifdef CONFIG_SYS_FSL_DDR4
rd_to_pre = picos_to_mclk(ctrl_num, 7500);
#else
rd_to_pre = picos_to_mclk(ctrl_num, common_dimm->trtp_ps);
#endif
/*
* JEDEC has some min requirements for tRTP
*/
#if defined(CONFIG_SYS_FSL_DDR2)
if (rd_to_pre < 2)
rd_to_pre = 2;
#elif defined(CONFIG_SYS_FSL_DDR3) || defined(CONFIG_SYS_FSL_DDR4)
if (rd_to_pre < 4)
rd_to_pre = 4;
#endif
if (popts->otf_burst_chop_en)
rd_to_pre += 2; /* according to UM */
wr_data_delay = popts->write_data_delay;
#ifdef CONFIG_SYS_FSL_DDR4
cpo = 0;
cke_pls = max(3U, picos_to_mclk(ctrl_num, 5000));
#elif defined(CONFIG_SYS_FSL_DDR3)
/*
* cke pulse = max(3nCK, 7.5ns) for DDR3-800
* max(3nCK, 5.625ns) for DDR3-1066, 1333
* max(3nCK, 5ns) for DDR3-1600, 1866, 2133
*/
cke_pls = max(3U, picos_to_mclk(ctrl_num, mclk_ps > 1870 ? 7500 :
(mclk_ps > 1245 ? 5625 : 5000)));
#else
cke_pls = FSL_DDR_MIN_TCKE_PULSE_WIDTH_DDR;
#endif
four_act = picos_to_mclk(ctrl_num,
popts->tfaw_window_four_activates_ps);
ddr->timing_cfg_2 = (0
| ((add_lat_mclk & 0xf) << 28)
| ((cpo & 0x1f) << 23)
| ((wr_lat & 0xf) << 19)
| (((wr_lat & 0x10) >> 4) << 18)
| ((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 = 0; /* 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 acc_ecc_en = 0; /* Accumulated ECC enable */
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;
}
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) ||
(sdram_type == SDRAM_TYPE_DDR4)) {
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;
/* set when ddr bus width < 64 */
acc_ecc_en = 0;//(dbw != 0 && ecc_en == 1) ? 1 : 0;
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)
| ((acc_ecc_en & 0x1) << 2)
| ((mem_halt & 0x1) << 1)
| ((bi & 0x1) << 0)
);
printf("FSLDDR: ddr_sdram_cfg = 0x%08x\n", ddr->ddr_sdram_cfg);
}
static void set_ddr_sdram_cfg_mem_en(fsl_ddr_cfg_regs_t *ddr){
int mem_en = 1;
ddr->ddr_sdram_cfg = ( ddr->ddr_sdram_cfg
| ((mem_en & 0x1) << 31));
printf("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(const unsigned int ctrl_num,
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 odt_cfg = 0; /* ODT configuration */
unsigned int num_pr; /* Number of posted refreshes */
unsigned int slow = 0; /* DDR will be run less than 1250 */
unsigned int x4_en = 0; /* x4 DRAM enable */
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;
#ifndef CONFIG_SYS_FSL_DDR4
unsigned int dll_rst_dis = 1; /* DLL reset disable */
unsigned int dqs_cfg; /* DQS configuration */
dqs_cfg = popts->dqs_config;
#endif
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;
}
}
sr_ie = popts->self_refresh_interrupt_en;
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_SYS_FSL_DDR3) || defined(CONFIG_SYS_FSL_DDR4)
obc_cfg = popts->otf_burst_chop_en;
#else
obc_cfg = 0;
#endif
#if (CONFIG_SYS_FSL_DDR_VER >= FSL_DDR_VER_4_7)
slow = get_ddr_freq(ctrl_num) < 1249000000;
#endif
if (popts->registered_dimm_en)
rcw_en = 1;
/* DDR4 can have address parity for UDIMM and discrete */
if ((CONFIG_FSL_SDRAM_TYPE != SDRAM_TYPE_DDR4) &&
(!popts->registered_dimm_en)) {
ap_en = 0;
} else {
ap_en = popts->ap_en;
}
x4_en = popts->x4_en ? 1 : 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 = 0x22221111;//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_SYS_FSL_DDR3) || defined(CONFIG_SYS_FSL_DDR4)
md_en = popts->mirrored_dimm;
#endif
d_init = 0;
qd_en = popts->quad_rank_present ? 1 : 0;
ddr->ddr_sdram_cfg_2 = (0
| ((frc_sr & 0x1) << 31)
| ((sr_ie & 0x1) << 30)
#ifndef CONFIG_SYS_FSL_DDR4
| ((dll_rst_dis & 0x1) << 29)
| ((dqs_cfg & 0x3) << 26)
#endif
| ((odt_cfg & 0x3) << 21)
| ((num_pr & 0xf) << 12)
| ((slow & 1) << 11)
| (x4_en << 10)
| (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)
);
printf("FSLDDR: ddr_sdram_cfg_2 = 0x%08x\n", ddr->ddr_sdram_cfg_2);
}
#ifdef CONFIG_SYS_FSL_DDR4
/* DDR SDRAM Mode configuration 2 (DDR_SDRAM_MODE_2) */
static void set_ddr_sdram_mode_2(const unsigned int ctrl_num,
fsl_ddr_cfg_regs_t *ddr,
const memctl_options_t *popts,
const common_timing_params_t *common_dimm,
const unsigned int unq_mrs_en)
{
unsigned short esdmode2 = 0; /* Extended SDRAM mode 2 */
unsigned short esdmode3 = 0; /* Extended SDRAM mode 3 */
int i;
unsigned int wr_crc = 0; /* Disable */
unsigned int rtt_wr = 0; /* Rtt_WR - dynamic ODT off */
unsigned int srt = 0; /* self-refresh temerature, normal range */
unsigned int cwl = compute_cas_write_latency(ctrl_num) - 9;
unsigned int mpr = 0; /* serial */
unsigned int wc_lat;
const unsigned int mclk_ps = get_memory_clk_period_ps(ctrl_num);
if (popts->rtt_override)
rtt_wr = popts->rtt_wr_override_value;
else
rtt_wr = popts->cs_local_opts[0].odt_rtt_wr;
if (common_dimm->extended_op_srt)
srt = common_dimm->extended_op_srt;
esdmode2 = (0
| ((wr_crc & 0x1) << 12)
| ((rtt_wr & 0x3) << 9)
| ((srt & 0x3) << 6)
| ((cwl & 0x7) << 3));
if (mclk_ps >= 1250)
wc_lat = 0;
else if (mclk_ps >= 833)
wc_lat = 1;
else
wc_lat = 2;
esdmode3 = (0
| ((mpr & 0x3) << 11)
| ((wc_lat & 0x3) << 9));
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);
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);
}
}
#elif defined(CONFIG_SYS_FSL_DDR3)
/* DDR SDRAM Mode configuration 2 (DDR_SDRAM_MODE_2) */
static void set_ddr_sdram_mode_2(const unsigned int ctrl_num,
fsl_ddr_cfg_regs_t *ddr,
const memctl_options_t *popts,
const common_timing_params_t *common_dimm,
const unsigned int unq_mrs_en)
{
unsigned short esdmode2 = 0; /* Extended SDRAM mode 2 */
unsigned short esdmode3 = 0; /* Extended SDRAM mode 3 */
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(ctrl_num) - 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;
if (common_dimm->extended_op_srt)
srt = common_dimm->extended_op_srt;
esdmode2 = (0
| ((rtt_wr & 0x3) << 9)
| ((srt & 0x1) << 7)
| ((asr & 0x1) << 6)
| ((cwl & 0x7) << 3)
| ((pasr & 0x7) << 0));
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);
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);
}
}
#else /* for DDR2 and DDR1 */
/* DDR SDRAM Mode configuration 2 (DDR_SDRAM_MODE_2) */
static void set_ddr_sdram_mode_2(const unsigned int ctrl_num,
fsl_ddr_cfg_regs_t *ddr,
const memctl_options_t *popts,
const common_timing_params_t *common_dimm,
const unsigned int unq_mrs_en)
{
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);
}
#endif
#ifdef CONFIG_SYS_FSL_DDR4
/* DDR SDRAM Mode configuration 9 (DDR_SDRAM_MODE_9) */
static void set_ddr_sdram_mode_9(fsl_ddr_cfg_regs_t *ddr,
const memctl_options_t *popts,
const common_timing_params_t *common_dimm,
const unsigned int unq_mrs_en)
{
int i;
unsigned short esdmode4 = 0; /* Extended SDRAM mode 4 */
unsigned short esdmode5; /* Extended SDRAM mode 5 */
int rtt_park = 0;
bool four_cs = false;
const unsigned int mclk_ps = get_memory_clk_period_ps(0);
#if CONFIG_CHIP_SELECTS_PER_CTRL == 4
if ((ddr->cs[0].config & SDRAM_CS_CONFIG_EN) &&
(ddr->cs[1].config & SDRAM_CS_CONFIG_EN) &&
(ddr->cs[2].config & SDRAM_CS_CONFIG_EN) &&
(ddr->cs[3].config & SDRAM_CS_CONFIG_EN))
four_cs = true;
#endif
if (ddr->cs[0].config & SDRAM_CS_CONFIG_EN) {
esdmode5 = 0x00000500; /* Data mask enable, RTT_PARK CS0 */
rtt_park = four_cs ? 0 : 1;
} else {
esdmode5 = 0x00000400; /* Data mask enabled */
}
/* set command/address parity latency */
if (ddr->ddr_sdram_cfg_2 & SDRAM_CFG2_AP_EN) {
if (mclk_ps >= 935) {
/* for DDR4-1600/1866/2133 */
esdmode5 |= DDR_MR5_CA_PARITY_LAT_4_CLK;
} else if (mclk_ps >= 833) {
/* for DDR4-2400 */
esdmode5 |= DDR_MR5_CA_PARITY_LAT_5_CLK;
} else {
printf("parity: mclk_ps = %d not supported\n", mclk_ps);
}
}
ddr->ddr_sdram_mode_9 = (0
| ((esdmode4 & 0xffff) << 16)
| ((esdmode5 & 0xffff) << 0)
);
/* Normally only the first enabled CS use 0x500, others use 0x400
* But when four chip-selects are all enabled, all mode registers
* need 0x500 to park.
*/
debug("FSLDDR: ddr_sdram_mode_9) = 0x%08x\n", ddr->ddr_sdram_mode_9);
if (unq_mrs_en) { /* unique mode registers are supported */
for (i = 1; i < CONFIG_CHIP_SELECTS_PER_CTRL; i++) {
if (!rtt_park &&
(ddr->cs[i].config & SDRAM_CS_CONFIG_EN)) {
esdmode5 |= 0x00000500; /* RTT_PARK */
rtt_park = four_cs ? 0 : 1;
} else {
esdmode5 = 0x00000400;
}
if (ddr->ddr_sdram_cfg_2 & SDRAM_CFG2_AP_EN) {
if (mclk_ps >= 935) {
/* for DDR4-1600/1866/2133 */
esdmode5 |= DDR_MR5_CA_PARITY_LAT_4_CLK;
} else if (mclk_ps >= 833) {
/* for DDR4-2400 */
esdmode5 |= DDR_MR5_CA_PARITY_LAT_5_CLK;
} else {
printf("parity: mclk_ps = %d not supported\n",
mclk_ps);
}
}
switch (i) {
case 1:
ddr->ddr_sdram_mode_11 = (0
| ((esdmode4 & 0xFFFF) << 16)
| ((esdmode5 & 0xFFFF) << 0)
);
break;
case 2:
ddr->ddr_sdram_mode_13 = (0
| ((esdmode4 & 0xFFFF) << 16)
| ((esdmode5 & 0xFFFF) << 0)
);
break;
case 3:
ddr->ddr_sdram_mode_15 = (0
| ((esdmode4 & 0xFFFF) << 16)
| ((esdmode5 & 0xFFFF) << 0)
);
break;
}
}
debug("FSLDDR: ddr_sdram_mode_11 = 0x%08x\n",
ddr->ddr_sdram_mode_11);
debug("FSLDDR: ddr_sdram_mode_13 = 0x%08x\n",
ddr->ddr_sdram_mode_13);
debug("FSLDDR: ddr_sdram_mode_15 = 0x%08x\n",
ddr->ddr_sdram_mode_15);
}
}
/* DDR SDRAM Mode configuration 10 (DDR_SDRAM_MODE_10) */
static void set_ddr_sdram_mode_10(const unsigned int ctrl_num,
fsl_ddr_cfg_regs_t *ddr,
const memctl_options_t *popts,
const common_timing_params_t *common_dimm,
const unsigned int unq_mrs_en)
{
int i;
unsigned short esdmode6 = 0; /* Extended SDRAM mode 6 */
unsigned short esdmode7 = 0; /* Extended SDRAM mode 7 */
unsigned int tccdl_min = picos_to_mclk(ctrl_num, common_dimm->tccdl_ps);
esdmode6 = ((tccdl_min - 4) & 0x7) << 10;
if (popts->ddr_cdr2 & DDR_CDR2_VREF_RANGE_2)
esdmode6 |= 1 << 6; /* Range 2 */
ddr->ddr_sdram_mode_10 = (0
| ((esdmode6 & 0xffff) << 16)
| ((esdmode7 & 0xffff) << 0)
);
debug("FSLDDR: ddr_sdram_mode_10) = 0x%08x\n", ddr->ddr_sdram_mode_10);
if (unq_mrs_en) { /* unique mode registers are supported */
for (i = 1; i < CONFIG_CHIP_SELECTS_PER_CTRL; i++) {
switch (i) {
case 1:
ddr->ddr_sdram_mode_12 = (0
| ((esdmode6 & 0xFFFF) << 16)
| ((esdmode7 & 0xFFFF) << 0)
);
break;
case 2:
ddr->ddr_sdram_mode_14 = (0
| ((esdmode6 & 0xFFFF) << 16)
| ((esdmode7 & 0xFFFF) << 0)
);
break;
case 3:
ddr->ddr_sdram_mode_16 = (0
| ((esdmode6 & 0xFFFF) << 16)
| ((esdmode7 & 0xFFFF) << 0)
);
break;
}
}
debug("FSLDDR: ddr_sdram_mode_12 = 0x%08x\n",
ddr->ddr_sdram_mode_12);
debug("FSLDDR: ddr_sdram_mode_14 = 0x%08x\n",
ddr->ddr_sdram_mode_14);
debug("FSLDDR: ddr_sdram_mode_16 = 0x%08x\n",
ddr->ddr_sdram_mode_16);
}
}
#endif
/* DDR SDRAM Interval Configuration (DDR_SDRAM_INTERVAL) */
static void set_ddr_sdram_interval(const unsigned int ctrl_num,
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(ctrl_num, 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);
}
#ifdef CONFIG_SYS_FSL_DDR4
/* DDR SDRAM Mode configuration set (DDR_SDRAM_MODE) */
static void set_ddr_sdram_mode(const unsigned int ctrl_num,
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)
{
int i;
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 = 1; /* DLL Enable 1=Enable (Normal),
0=Disable (Test/Debug) */
/* Mode Register - MR0 */
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;
/* DDR4 support WR 10, 12, 14, 16, 18, 20, 24 */
static const u8 wr_table[] = {
0, 1, 1, 2, 2, 3, 3, 4, 4, 5, 5, 6, 6, 6, 6};
/* DDR4 support CAS 9, 10, 11, 12, 13, 14, 15, 16, 18, 20, 22, 24 */
static const u8 cas_latency_table[] = {
0, 1, 2, 3, 4, 5, 6, 7, 8, 8,
9, 9, 10, 10, 11, 11};
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 & 0x7) << 8)
| ((wrlvl_en & 0x1) << 7)
| ((al & 0x3) << 3)
| ((dic & 0x3) << 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)
*/
wr_mclk = picos_to_mclk(ctrl_num, common_dimm->twr_ps);
if (wr_mclk <= 24) {
wr = wr_table[wr_mclk - 10];
} 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 >= 9 && cas_latency <= 24)
caslat = cas_latency_table[cas_latency - 9];
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. ",
popts->burst_length);
puts("Defaulting to on-the-fly BC4 or BL8 beats.\n");
bl = 1;
break;
}
sdmode = (0
| ((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 &= 0xF8FF; /* clear bit 10,9,8 for rtt */
esdmode |= (rtt & 0x7) << 8;
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);
}
}
#elif defined(CONFIG_SYS_FSL_DDR3)
/* DDR SDRAM Mode configuration set (DDR_SDRAM_MODE) */
static void set_ddr_sdram_mode(const unsigned int ctrl_num,
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)
{
int i;
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};
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 = picos_to_mclk(ctrl_num, common_dimm->twr_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_SYS_FSL_DDR3 */
/* DDR SDRAM Mode configuration set (DDR_SDRAM_MODE) */
static void set_ddr_sdram_mode(const unsigned int ctrl_num,
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 */
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_SYS_FSL_DDR1)
wr = 0; /* Historical */
#elif defined(CONFIG_SYS_FSL_DDR2)
wr = picos_to_mclk(ctrl_num, common_dimm->twr_ps);
#endif
dll_res = 0;
mode = 0;
#if defined(CONFIG_SYS_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_SYS_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 */
#ifdef CONFIG_MEM_INIT_VALUE
init_value = 0x22222222;//CONFIG_MEM_INIT_VALUE;
#else
init_value = 0xDEADBEEF;
#endif
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 */
unsigned int ss_en = 0; /* Source synchronous enable */
#if defined(CONFIG_MPC8541) || defined(CONFIG_MPC8555)
/* Per FSL Application Note: AN2805 */
ss_en = 1;
#endif
if (fsl_ddr_get_version(0) >= 0x40701) {
/* clk_adjust in 5-bits on T-series and LS-series */
clk_adjust = (popts->clk_adjust & 0x1F) << 22;
} else {
/* clk_adjust in 4-bits on earlier MPC85xx and P-series */
clk_adjust = (popts->clk_adjust & 0xF) << 23;
}
ddr->ddr_sdram_clk_cntl = (0
| ((ss_en & 0x1) << 31)
| clk_adjust
);
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 trwt_mclk = 0; /* ext_rwt */
unsigned int dll_lock = 0; /* DDR SDRAM DLL Lock Time */
#if defined(CONFIG_SYS_FSL_DDR3) || defined(CONFIG_SYS_FSL_DDR4)
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 */
}
#endif
#ifdef CONFIG_SYS_FSL_DDR4
dll_lock = 2; /* tDLLK = 1024 clocks */
#elif defined(CONFIG_SYS_FSL_DDR3)
dll_lock = 1; /* tDLLK = 512 clocks from spec */
#endif
if (popts->trwt_override)
trwt_mclk = popts->trwt;
ddr->timing_cfg_4 = (0
| ((rwt & 0xf) << 28)
| ((wrt & 0xf) << 24)
| ((rrt & 0xf) << 20)
| ((wwt & 0xf) << 16)
| ((trwt_mclk & 0xc) << 12)
| (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_SYS_FSL_DDR3) || defined(CONFIG_SYS_FSL_DDR4)
unsigned int wr_lat = ((ddr->timing_cfg_2 & 0x00780000) >> 19) +
((ddr->timing_cfg_2 & 0x00040000) >> 14);
/* rodt_on = timing_cfg_1[caslat] - timing_cfg_2[wrlat] + 1 */
if (cas_latency >= wr_lat)
rodt_on = cas_latency - wr_lat + 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);
}
#ifdef CONFIG_SYS_FSL_DDR4
static void set_timing_cfg_6(fsl_ddr_cfg_regs_t *ddr)
{
unsigned int hs_caslat = 0;
unsigned int hs_wrlat = 0;
unsigned int hs_wrrec = 0;
unsigned int hs_clkadj = 0;
unsigned int hs_wrlvl_start = 0;
ddr->timing_cfg_6 = (0
| ((hs_caslat & 0x1f) << 24)
| ((hs_wrlat & 0x1f) << 19)
| ((hs_wrrec & 0x1f) << 12)
| ((hs_clkadj & 0x1f) << 6)
| ((hs_wrlvl_start & 0x1f) << 0)
);
debug("FSLDDR: timing_cfg_6 = 0x%08x\n", ddr->timing_cfg_6);
}
static void set_timing_cfg_7(const unsigned int ctrl_num,
fsl_ddr_cfg_regs_t *ddr,
const common_timing_params_t *common_dimm)
{
unsigned int txpr, tcksre, tcksrx;
unsigned int cke_rst, cksre, cksrx, par_lat = 0, cs_to_cmd;
const unsigned int mclk_ps = get_memory_clk_period_ps(ctrl_num);
txpr = max(5U, picos_to_mclk(ctrl_num, common_dimm->trfc1_ps + 10000));
tcksre = max(5U, picos_to_mclk(ctrl_num, 10000));
tcksrx = max(5U, picos_to_mclk(ctrl_num, 10000));
if (ddr->ddr_sdram_cfg_2 & SDRAM_CFG2_AP_EN) {
if (mclk_ps >= 935) {
/* parity latency 4 clocks in case of 1600/1866/2133 */
par_lat = 4;
} else if (mclk_ps >= 833) {
/* parity latency 5 clocks for DDR4-2400 */
par_lat = 5;
} else {
printf("parity: mclk_ps = %d not supported\n", mclk_ps);
}
}
cs_to_cmd = 0;
if (txpr <= 200)
cke_rst = 0;
else if (txpr <= 256)
cke_rst = 1;
else if (txpr <= 512)
cke_rst = 2;
else
cke_rst = 3;
if (tcksre <= 19)
cksre = tcksre - 5;
else
cksre = 15;
if (tcksrx <= 19)
cksrx = tcksrx - 5;
else
cksrx = 15;
ddr->timing_cfg_7 = (0
| ((cke_rst & 0x3) << 28)
| ((cksre & 0xf) << 24)
| ((cksrx & 0xf) << 20)
| ((par_lat & 0xf) << 16)
| ((cs_to_cmd & 0xf) << 4)
);
debug("FSLDDR: timing_cfg_7 = 0x%08x\n", ddr->timing_cfg_7);
}
static void set_timing_cfg_8(const unsigned int ctrl_num,
fsl_ddr_cfg_regs_t *ddr,
const memctl_options_t *popts,
const common_timing_params_t *common_dimm,
unsigned int cas_latency)
{
unsigned int rwt_bg, wrt_bg, rrt_bg, wwt_bg;
unsigned int acttoact_bg, wrtord_bg, pre_all_rec;
unsigned int tccdl = picos_to_mclk(ctrl_num, common_dimm->tccdl_ps);
unsigned int wr_lat = ((ddr->timing_cfg_2 & 0x00780000) >> 19) +
((ddr->timing_cfg_2 & 0x00040000) >> 14);
rwt_bg = cas_latency + 2 + 4 - wr_lat;
if (rwt_bg < tccdl)
rwt_bg = tccdl - rwt_bg;
else
rwt_bg = 0;
wrt_bg = wr_lat + 4 + 1 - cas_latency;
if (wrt_bg < tccdl)
wrt_bg = tccdl - wrt_bg;
else
wrt_bg = 0;
if (popts->burst_length == DDR_BL8) {
rrt_bg = tccdl - 4;
wwt_bg = tccdl - 4;
} else {
rrt_bg = tccdl - 2;
wwt_bg = tccdl - 2;
}
acttoact_bg = picos_to_mclk(ctrl_num, common_dimm->trrdl_ps);
wrtord_bg = max(4U, picos_to_mclk(ctrl_num, 7500));
if (popts->otf_burst_chop_en)
wrtord_bg += 2;
pre_all_rec = 0;
ddr->timing_cfg_8 = (0
| ((rwt_bg & 0xf) << 28)
| ((wrt_bg & 0xf) << 24)
| ((rrt_bg & 0xf) << 20)
| ((wwt_bg & 0xf) << 16)
| ((acttoact_bg & 0xf) << 12)
| ((wrtord_bg & 0xf) << 8)
| ((pre_all_rec & 0x1f) << 0)
);
debug("FSLDDR: timing_cfg_8 = 0x%08x\n", ddr->timing_cfg_8);
}
static void set_timing_cfg_9(fsl_ddr_cfg_regs_t *ddr)
{
ddr->timing_cfg_9 = 0;
debug("FSLDDR: timing_cfg_9 = 0x%08x\n", ddr->timing_cfg_9);
}
/* This function needs to be called after set_ddr_sdram_cfg() is called */
static void set_ddr_dq_mapping(fsl_ddr_cfg_regs_t *ddr,
const dimm_params_t *dimm_params)
{
unsigned int acc_ecc_en = (ddr->ddr_sdram_cfg >> 2) & 0x1;
int i;
for (i = 0; i < CONFIG_DIMM_SLOTS_PER_CTLR; i++) {
if (dimm_params[i].n_ranks)
break;
}
if (i >= CONFIG_DIMM_SLOTS_PER_CTLR) {
puts("DDR error: no DIMM found!\n");
return;
}
ddr->dq_map_0 = ((dimm_params[i].dq_mapping[0] & 0x3F) << 26) |
((dimm_params[i].dq_mapping[1] & 0x3F) << 20) |
((dimm_params[i].dq_mapping[2] & 0x3F) << 14) |
((dimm_params[i].dq_mapping[3] & 0x3F) << 8) |
((dimm_params[i].dq_mapping[4] & 0x3F) << 2);
ddr->dq_map_1 = ((dimm_params[i].dq_mapping[5] & 0x3F) << 26) |
((dimm_params[i].dq_mapping[6] & 0x3F) << 20) |
((dimm_params[i].dq_mapping[7] & 0x3F) << 14) |
((dimm_params[i].dq_mapping[10] & 0x3F) << 8) |
((dimm_params[i].dq_mapping[11] & 0x3F) << 2);
ddr->dq_map_2 = ((dimm_params[i].dq_mapping[12] & 0x3F) << 26) |
((dimm_params[i].dq_mapping[13] & 0x3F) << 20) |
((dimm_params[i].dq_mapping[14] & 0x3F) << 14) |
((dimm_params[i].dq_mapping[15] & 0x3F) << 8) |
((dimm_params[i].dq_mapping[16] & 0x3F) << 2);
/* dq_map for ECC[4:7] is set to 0 if accumulated ECC is enabled */
ddr->dq_map_3 = ((dimm_params[i].dq_mapping[17] & 0x3F) << 26) |
((dimm_params[i].dq_mapping[8] & 0x3F) << 20) |
(acc_ecc_en ? 0 :
(dimm_params[i].dq_mapping[9] & 0x3F) << 14) |
dimm_params[i].dq_mapping_ors;
debug("FSLDDR: dq_map_0 = 0x%08x\n", ddr->dq_map_0);
debug("FSLDDR: dq_map_1 = 0x%08x\n", ddr->dq_map_1);
debug("FSLDDR: dq_map_2 = 0x%08x\n", ddr->dq_map_2);
debug("FSLDDR: dq_map_3 = 0x%08x\n", ddr->dq_map_3);
}
static void set_ddr_sdram_cfg_3(fsl_ddr_cfg_regs_t *ddr,
const memctl_options_t *popts)
{
int rd_pre;
rd_pre = popts->quad_rank_present ? 1 : 0;
ddr->ddr_sdram_cfg_3 = (rd_pre & 0x1) << 16;
debug("FSLDDR: ddr_sdram_cfg_3 = 0x%08x\n", ddr->ddr_sdram_cfg_3);
}
#endif /* CONFIG_SYS_FSL_DDR4 */
/* 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;
#ifdef CONFIG_SYS_FSL_DDR4
unsigned int zqcs_init;
#endif
if (zq_en) {
#ifdef CONFIG_SYS_FSL_DDR4
zqinit = 10; /* 1024 clocks */
zqoper = 9; /* 512 clocks */
zqcs = 7; /* 128 clocks */
zqcs_init = 5; /* 1024 refresh sequences */
#else
zqinit = 9; /* 512 clocks */
zqoper = 8; /* 256 clocks */
zqcs = 6; /* 64 clocks */
#endif
}
ddr->ddr_zq_cntl = (0
| ((zq_en & 0x1) << 31)
| ((zqinit & 0xF) << 24)
| ((zqoper & 0xF) << 16)
| ((zqcs & 0xF) << 8)
#ifdef CONFIG_SYS_FSL_DDR4
| ((zqcs_init & 0xF) << 0)
#endif
);
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
* overridden 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->ddr_wrlvl_cntl_2 = popts->wrlvl_ctl_2;
debug("FSLDDR: wrlvl_cntl_2 = 0x%08x\n", ddr->ddr_wrlvl_cntl_2);
ddr->ddr_wrlvl_cntl_3 = popts->wrlvl_ctl_3;
debug("FSLDDR: wrlvl_cntl_3 = 0x%08x\n", ddr->ddr_wrlvl_cntl_3);
}
/* 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);
}
static void set_ddr_cdr2(fsl_ddr_cfg_regs_t *ddr, const memctl_options_t *popts)
{
ddr->ddr_cdr2 = popts->ddr_cdr2;
debug("FSLDDR: ddr_cdr2 = 0x%08x\n", ddr->ddr_cdr2);
}
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 unsigned int ctrl_num,
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;
#ifdef CONFIG_SYS_FSL_ERRATUM_A009942
unsigned int ddr_freq;
#endif
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, sa;
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 >> dbw_cap_adj;
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) {
switch (popts->ba_intlv_ctl & FSL_DDR_CS0_CS1_CS2_CS3) {
case FSL_DDR_CS0_CS1_CS2_CS3:
break;
case FSL_DDR_CS0_CS1:
case FSL_DDR_CS0_CS1_AND_CS2_CS3:
if (i > 1)
cs_en = 0;
break;
case FSL_DDR_CS2_CS3:
default:
if (i > 0)
cs_en = 0;
break;
}
sa = common_dimm->base_address;
ea = sa + common_dimm->total_mem - 1;
} else if (!popts->memctl_interleaving) {
/*
* 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:
sa = common_dimm->base_address;
ea = sa + common_dimm->total_mem - 1;
break;
case FSL_DDR_CS0_CS1_AND_CS2_CS3:
if ((i >= 2) && (dimm_number == 0)) {
sa = dimm_params[dimm_number].base_address +
2 * rank_density;
ea = sa + 2 * rank_density - 1;
} else {
sa = dimm_params[dimm_number].base_address;
ea = sa + 2 * rank_density - 1;
}
break;
case FSL_DDR_CS0_CS1:
if (dimm_params[dimm_number].n_ranks > (i % cs_per_dimm)) {
sa = dimm_params[dimm_number].base_address;
ea = sa + rank_density - 1;
if (i != 1)
sa += (i % cs_per_dimm) * rank_density;
ea += (i % cs_per_dimm) * rank_density;
} else {
sa = 0;
ea = 0;
}
if (i == 0)
ea += rank_density;
break;
case FSL_DDR_CS2_CS3:
if (dimm_params[dimm_number].n_ranks > (i % cs_per_dimm)) {
sa = dimm_params[dimm_number].base_address;
ea = sa + rank_density - 1;
if (i != 3)
sa += (i % cs_per_dimm) * rank_density;
ea += (i % cs_per_dimm) * rank_density;
} else {
sa = 0;
ea = 0;
}
if (i == 2)
ea += (rank_density >> dbw_cap_adj);
break;
default: /* No bank(chip-select) interleaving */
sa = dimm_params[dimm_number].base_address;
ea = sa + rank_density - 1;
if (dimm_params[dimm_number].n_ranks > (i % cs_per_dimm)) {
sa += (i % cs_per_dimm) * rank_density;
ea += (i % cs_per_dimm) * rank_density;
} else {
sa = 0;
ea = 0;
}
break;
}
}
sa >>= 24;
ea >>= 24;
if (cs_en) {
ddr->cs[i].bnds = (0
| ((sa & 0xffff) << 16) /* starting address */
| ((ea & 0xffff) << 0) /* ending address */
);
} else {
/* setting bnds to 0xffffffff for inactive CS */
ddr->cs[i].bnds = 0xffffffff;
}
debug("FSLDDR: cs[%d]_bnds = 0x%08x\n", i, ddr->cs[i].bnds);
set_csn_config(dimm_number, i, ddr, popts, dimm_params);
set_csn_config_2(i, ddr);
}
/*
* 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_SYS_FSL_DDR1)
set_timing_cfg_0(ctrl_num, ddr, popts, dimm_params);
#endif
set_timing_cfg_3(ctrl_num, ddr, popts, common_dimm, cas_latency,
additive_latency);
set_timing_cfg_1(ctrl_num, ddr, popts, common_dimm, cas_latency);
set_timing_cfg_2(ctrl_num, ddr, popts, common_dimm,
cas_latency, additive_latency);
set_ddr_cdr1(ddr, popts);
set_ddr_cdr2(ddr, popts);
set_ddr_sdram_cfg(ddr, popts, common_dimm);
ip_rev = fsl_ddr_get_version(ctrl_num);
if (ip_rev > 0x40400)
unq_mrs_en = 1;
if ((ip_rev > 0x40700) && (popts->cswl_override != 0))
ddr->debug[18] = popts->cswl_override;
set_ddr_sdram_cfg_2(ctrl_num, ddr, popts, unq_mrs_en);
set_ddr_sdram_cfg_mem_en(ddr);
set_ddr_sdram_mode(ctrl_num, ddr, popts, common_dimm,
cas_latency, additive_latency, unq_mrs_en);
set_ddr_sdram_mode_2(ctrl_num, ddr, popts, common_dimm, unq_mrs_en);
#ifdef CONFIG_SYS_FSL_DDR4
set_ddr_sdram_mode_9(ddr, popts, common_dimm, unq_mrs_en);
set_ddr_sdram_mode_10(ctrl_num, ddr, popts, common_dimm, unq_mrs_en);
#endif
set_ddr_sdram_interval(ctrl_num, 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);
#ifdef CONFIG_SYS_FSL_DDR4
set_ddr_sdram_cfg_3(ddr, popts);
set_timing_cfg_6(ddr);
set_timing_cfg_7(ctrl_num, ddr, common_dimm);
set_timing_cfg_8(ctrl_num, ddr, popts, common_dimm, cas_latency);
set_timing_cfg_9(ddr);
set_ddr_dq_mapping(ddr, dimm_params);
#endif
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);
#ifdef CONFIG_SYS_FSL_DDR_EMU
/* disble DDR training for emulator */
ddr->debug[2] = 0x00000400;
ddr->debug[4] = 0xff800800;
ddr->debug[5] = 0x08000800;
ddr->debug[6] = 0x08000800;
ddr->debug[7] = 0x08000800;
ddr->debug[8] = 0x08000800;
#endif
#ifdef CONFIG_SYS_FSL_ERRATUM_A004508
if ((ip_rev >= 0x40000) && (ip_rev < 0x40400))
ddr->debug[2] |= 0x00000200; /* set bit 22 */
#endif
#if defined(CONFIG_SYS_FSL_ERRATUM_A008378) && defined(CONFIG_SYS_FSL_DDRC_GEN4)
/* Erratum applies when accumulated ECC is used, or DBI is enabled */
#define IS_ACC_ECC_EN(v) ((v) & 0x4)
#define IS_DBI(v) ((((v) >> 12) & 0x3) == 0x2)
if (has_erratum_a008378()) {
if (IS_ACC_ECC_EN(ddr->ddr_sdram_cfg) ||
IS_DBI(ddr->ddr_sdram_cfg_3))
ddr->debug[28] |= (0x9 << 20);
}
#endif
#ifdef CONFIG_SYS_FSL_ERRATUM_A009942
/* the POR value of debug_29 register is zero */
ddr_freq = get_ddr_freq(ctrl_num) / 1000000;
if (ddr_freq <= 1333)
ddr->debug[28] |= 0x0080006a;
else if (ddr_freq <= 1600)
ddr->debug[28] |= 0x0070006f;
else if (ddr_freq <= 1867)
ddr->debug[28] |= 0x00700076;
else if (ddr_freq <= 2133)
ddr->debug[28] |= 0x0060007b;
if (popts->cpo_sample)
ddr->debug[28] = (ddr->debug[28] & 0xffffff00) |
popts->cpo_sample;
#endif
return check_fsl_memctl_config_regs(ddr);
}
#ifdef CONFIG_SYS_FSL_ERRATUM_A009942
/*
* This additional workaround of A009942 checks the condition to determine if
* the CPO value set by the existing A009942 workaround needs to be updated.
* If need, print a warning to prompt user reconfigure DDR debug_29[24:31] with
* expected optimal value, the optimal value is highly board dependent.
*/
void erratum_a009942_check_cpo(void)
{
struct ccsr_ddr __iomem *ddr =
(struct ccsr_ddr __iomem *)(CONFIG_SYS_FSL_DDR_ADDR);
u32 cpo, cpo_e, cpo_o, cpo_target, cpo_optimal;
u32 cpo_min = ddr_in32(&ddr->debug[9]) >> 24;
u32 cpo_max = cpo_min;
u32 sdram_cfg, i, tmp, lanes, ddr_type;
bool update_cpo = false, has_ecc = false;
sdram_cfg = ddr_in32(&ddr->sdram_cfg);
if (sdram_cfg & SDRAM_CFG_32_BE)
lanes = 4;
else if (sdram_cfg & SDRAM_CFG_16_BE)
lanes = 2;
else
lanes = 8;
if (sdram_cfg & SDRAM_CFG_ECC_EN)
has_ecc = true;
/* determine the maximum and minimum CPO values */
for (i = 9; i < 9 + lanes / 2; i++) {
cpo = ddr_in32(&ddr->debug[i]);
cpo_e = cpo >> 24;
cpo_o = (cpo >> 8) & 0xff;
tmp = min(cpo_e, cpo_o);
if (tmp < cpo_min)
cpo_min = tmp;
tmp = max(cpo_e, cpo_o);
if (tmp > cpo_max)
cpo_max = tmp;
}
if (has_ecc) {
cpo = ddr_in32(&ddr->debug[13]);
cpo = cpo >> 24;
if (cpo < cpo_min)
cpo_min = cpo;
if (cpo > cpo_max)
cpo_max = cpo;
}
cpo_target = ddr_in32(&ddr->debug[28]) & 0xff;
cpo_optimal = ((cpo_max + cpo_min) >> 1) + 0x27;
debug("cpo_optimal = 0x%x, cpo_target = 0x%x\n", cpo_optimal,
cpo_target);
debug("cpo_max = 0x%x, cpo_min = 0x%x\n", cpo_max, cpo_min);
ddr_type = (sdram_cfg & SDRAM_CFG_SDRAM_TYPE_MASK) >>
SDRAM_CFG_SDRAM_TYPE_SHIFT;
if (ddr_type == SDRAM_TYPE_DDR4)
update_cpo = (cpo_min + 0x3b) < cpo_target ? true : false;
else if (ddr_type == SDRAM_TYPE_DDR3)
update_cpo = (cpo_min + 0x3f) < cpo_target ? true : false;
if (update_cpo) {
printf("WARN: pls set popts->cpo_sample = 0x%x ", cpo_optimal);
printf("in <board>/ddr.c to optimize cpo\n");
}
}
#endif