sysmo-bts
/
barebox
9
0
Fork 0
Code Releases Activity
barebox/arch/ppc/ddr-8xxx/ctrl_regs.c

779 lines
21 KiB
C
Raw Blame History

/*
* 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 DDR2/DDR3 memory controller.
* Based on code from spd_sdram.c
* Author: James Yang [at freescale.com]
*/
#include <common.h>
#include <asm/fsl_ddr_sdram.h>
#include "ddr.h"
static uint32_t compute_cas_write_latency(void)
{
uint32_t cwl;
const uint32_t 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;
return cwl;
}
static void set_csn_config(int dimm_number, int i,
struct fsl_ddr_cfg_regs_s *ddr,
const struct memctl_options_s *popts,
const struct dimm_params_s *dimm)
{
uint32_t cs_n_en = 0, ap_n_en = 0, odt_rd_cfg = 0, odt_wr_cfg = 0,
ba_bits_cs_n = 0, row_bits_cs_n = 0, col_bits_cs_n = 0,
n_banks_per_sdram_device;
int go_config = 0;
switch (i) {
case 0:
if (dimm[dimm_number].n_ranks > 0)
go_config = 1;
break;
case 1:
if ((dimm_number == 0 && dimm[0].n_ranks > 1) ||
(dimm_number == 1 && dimm[1].n_ranks > 0))
go_config = 1;
break;
case 2:
if ((dimm_number == 0 && dimm[0].n_ranks > 2) ||
(dimm_number >= 1 && dimm[dimm_number].n_ranks > 0))
go_config = 1;
break;
case 3:
if ((dimm_number == 0 && dimm[0].n_ranks > 3) ||
(dimm_number == 1 && dimm[1].n_ranks > 1) ||
(dimm_number == 3 && dimm[3].n_ranks > 0))
go_config = 1;
break;
default:
break;
}
if (go_config) {
/* Chip Select enable */
cs_n_en = 1;
/* CSn auto-precharge enable */
ap_n_en = popts->cs_local_opts[i].auto_precharge;
/* ODT for reads configuration */
odt_rd_cfg = popts->cs_local_opts[i].odt_rd_cfg;
/* ODT for writes configuration */
odt_wr_cfg = popts->cs_local_opts[i].odt_wr_cfg;
/* Num of bank bits for SDRAM on CSn */
n_banks_per_sdram_device =
dimm[dimm_number].n_banks_per_sdram_device;
ba_bits_cs_n = __ilog2(n_banks_per_sdram_device) - 2;
/* Num of row bits for SDRAM on CSn */
row_bits_cs_n = dimm[dimm_number].n_row_addr - 12;
/* Num of ocl bits for SDRAM on CSn */
col_bits_cs_n = dimm[dimm_number].n_col_addr - 8;
}
ddr->cs[i].config = (((cs_n_en & 0x1) << 31)
| ((ap_n_en & 0x1) << 23)
| ((odt_rd_cfg & 0x7) << 20)
| ((odt_wr_cfg & 0x7) << 16)
| ((ba_bits_cs_n & 0x3) << 14)
| ((row_bits_cs_n & 0x7) << 8)
| ((col_bits_cs_n & 0x7) << 0));
}
static void set_timing_cfg_0(struct fsl_ddr_cfg_regs_s *ddr,
const struct memctl_options_s *popts,
const struct dimm_params_s *dimm)
{
uint32_t trwt_mclk = 0, twrt_mclk = 0, act_pd_exit_mclk,
pre_pd_exit_mclk, taxpd_mclk, tmrd_mclk, txp,
data_rate = fsl_get_ddr_freq(0);
if (popts->sdram_type == SDRAM_TYPE_DDR2) {
act_pd_exit_mclk = popts->txard;
pre_pd_exit_mclk = popts->txp;
taxpd_mclk = popts->taxpd;
tmrd_mclk = popts->tmrd;
} else {
/*
* tXARD is not part of the DDR3 specification, use the
* parameter txp instead of it. That is:
* txp=max(3nCK, 7.5ns). As well, use tAXPD=1.
*/
txp = max_t(uint32_t, (get_memory_clk_period_ps() * 3), 7500);
data_rate = fsl_get_ddr_freq(0);
tmrd_mclk = 4;
/* for faster clock, need more time for data setup */
if (popts->trwt_override)
trwt_mclk = popts->trwt;
else if (data_rate / 1000000 > 1800)
trwt_mclk = 2;
else
trwt_mclk = 0;
if (data_rate / 1000000 > 1150)
twrt_mclk = 1;
else
twrt_mclk = 0;
taxpd_mclk = 1;
if (popts->dynamic_power == 0) {
act_pd_exit_mclk = 1;
pre_pd_exit_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;
}
}
ddr->timing_cfg_0 = (((trwt_mclk & 0x3) << 30)
| ((twrt_mclk & 0x3) << 28)
| ((act_pd_exit_mclk & 0xf) << 20)
| ((pre_pd_exit_mclk & 0xf) << 16)
| ((taxpd_mclk & 0xf) << 8)
| ((tmrd_mclk & 0x1f) << 0)
);
}
static void set_timing_cfg_3(struct fsl_ddr_cfg_regs_s *ddr,
const struct memctl_options_s *popts,
const struct common_timing_params_s *dimm,
uint32_t cas_latency, uint32_t additive_latency)
{
uint32_t ext_pretoact, ext_acttopre, ext_acttorw, ext_refrec, ext_wrrec;
ext_pretoact = picos_to_mclk(dimm->tRP_ps) >> 4;
ext_acttopre = picos_to_mclk(dimm->tRAS_ps) >> 4;
ext_acttorw = picos_to_mclk(dimm->tRCD_ps) >> 4;
cas_latency = ((cas_latency << 1) - 1) >> 4;
additive_latency = additive_latency >> 4;
ext_refrec = (picos_to_mclk(dimm->tRFC_ps) - 8) >> 4;
/* ext_wrrec only deals with 16 clock and above, or 14 with OTF */
ext_wrrec = (picos_to_mclk(dimm->tWR_ps) +
(popts->otf_burst_chop_en ? 2 : 0)) >> 4;
ddr->timing_cfg_3 = (((ext_pretoact & 0x1) << 28)
| ((ext_acttopre & 0x3) << 24)
| ((ext_acttorw & 0x1) << 22)
| ((ext_refrec & 0x1F) << 16)
| ((cas_latency & 0x3) << 12)
| ((additive_latency & 0x1) << 10)
| ((ext_wrrec & 0x1) << 8)
);
}
static void set_timing_cfg_1(struct fsl_ddr_cfg_regs_s *ddr,
const struct memctl_options_s *popts,
const struct common_timing_params_s *dimm,
uint32_t cas_latency)
{
uint32_t pretoact_mclk, acttopre_mclk, acttorw_mclk, refrec_ctrl,
wrrec_mclk, acttoact_mclk, 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(dimm->tRP_ps);
acttopre_mclk = picos_to_mclk(dimm->tRAS_ps);
acttorw_mclk = picos_to_mclk(dimm->tRCD_ps);
/*
* Translate CAS Latency to a DDR controller field value:
*
* CAS Lat DDR II Ctrl
* Clocks SPD Bit Value
* ------- ------- ------
* 1.0 0001
* 1.5 0010
* 2.0 2 0011
* 2.5 0100
* 3.0 3 0101
* 3.5 0110
* 4.0 4 0111
* 4.5 1000
* 5.0 5 1001
*/
cas_latency = (cas_latency << 1) - 1;
refrec_ctrl = picos_to_mclk(dimm->tRFC_ps) - 8;
acttoact_mclk = picos_to_mclk(dimm->tRRD_ps);
wrrec_mclk = picos_to_mclk(dimm->tWR_ps);
if (wrrec_mclk <= 16)
wrrec_mclk = wrrec_table[wrrec_mclk - 1];
if (popts->otf_burst_chop_en)
wrrec_mclk += 2;
wrtord_mclk = picos_to_mclk(dimm->tWTR_ps);
if (popts->sdram_type == SDRAM_TYPE_DDR2) {
wrtord_mclk = max_t(uint32_t, wrtord_mclk, 2);
} else {
wrtord_mclk = max_t(uint32_t, wrtord_mclk, 4);
acttoact_mclk = max_t(uint32_t, acttoact_mclk, 4);
}
if (popts->otf_burst_chop_en)
wrtord_mclk += 2;
ddr->timing_cfg_1 = (((pretoact_mclk & 0x0F) << 28)
| ((acttopre_mclk & 0x0F) << 24)
| ((acttorw_mclk & 0xF) << 20)
| ((cas_latency & 0xF) << 16)
| ((refrec_ctrl & 0xF) << 12)
| ((wrrec_mclk & 0x0F) << 8)
| ((acttoact_mclk & 0x0F) << 4)
| ((wrtord_mclk & 0x0F) << 0));
}
static void set_timing_cfg_2(struct fsl_ddr_cfg_regs_s *ddr,
const struct memctl_options_s *popts,
const struct common_timing_params_s *dimm,
uint32_t cas_latency, uint32_t additive_latency)
{
uint32_t cpo, rd_to_pre, wr_data_delay, cke_pls, four_act;
cpo = popts->cpo_override;
rd_to_pre = picos_to_mclk(dimm->tRTP_ps);
if (popts->sdram_type == SDRAM_TYPE_DDR2) {
cas_latency = cas_latency - 1;
rd_to_pre = max_t(uint32_t, rd_to_pre, 2);
} else {
cas_latency = compute_cas_write_latency();
rd_to_pre = max_t(uint32_t, rd_to_pre, 4);
}
if (popts->otf_burst_chop_en)
rd_to_pre += 2;
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 = (((additive_latency & 0xf) << 28)
| ((cpo & 0x1f) << 23)
| ((cas_latency & 0xf) << 19)
| ((rd_to_pre & 7) << 13)
| ((wr_data_delay & 7) << 10)
| ((cke_pls & 0x7) << 6)
| ((four_act & 0x3f) << 0));
}
static void set_ddr_sdram_cfg(struct fsl_ddr_cfg_regs_s *ddr,
const struct memctl_options_s *popts,
const struct common_timing_params_s *dimm)
{
uint32_t mem_en, sren, ecc_en, sdram_type, dyn_pwr, dbw, twoT_en, hse,
threet_en, eight_be = 0;
mem_en = 1;
sren = popts->self_refresh_in_sleep;
if (dimm->all_DIMMs_ECC_capable)
ecc_en = popts->ECC_mode;
else
ecc_en = 0;
sdram_type = popts->sdram_type;
twoT_en = popts->twoT_en;
dyn_pwr = popts->dynamic_power;
dbw = popts->data_bus_width;
hse = popts->half_strength_driver_enable;
threet_en = popts->threet_en;
if (sdram_type == SDRAM_TYPE_DDR3)
if ((popts->burst_length == DDR_BL8) || (dbw == 1))
eight_be = 1;
ddr->ddr_sdram_cfg = (((mem_en & 0x1) << 31)
| ((sren & 0x1) << 30)
| ((ecc_en & 0x1) << 29)
| ((sdram_type & 0x7) << 24)
| ((dyn_pwr & 0x1) << 21)
| ((dbw & 0x3) << 19)
| ((eight_be & 0x1) << 18)
| ((threet_en & 0x1) << 16)
| ((twoT_en & 0x1) << 15)
| ((hse & 0x1) << 3));
}
static void set_ddr_sdram_cfg_2(struct fsl_ddr_cfg_regs_s *ddr,
const struct memctl_options_s *popts)
{
struct ddr_board_info_s *bi = popts->board_info;
uint32_t i, dll_rst_dis, dqs_cfg, odt_cfg = 0, num_pr, d_init = 0,
obc_cfg = 0, x4_en, md_en = 0, rcw_en = 0;
dll_rst_dis = popts->dll_rst_dis;
dqs_cfg = popts->DQS_config;
/*
* Check for On-Die Termination options and
* assert ODT only during reads to DRAM.
*/
for (i = 0; i < bi->cs_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;
}
/* Default number of posted refresh */
num_pr = 1;
if (popts->ECC_init_using_memctl) {
d_init = 1;
ddr->ddr_data_init = popts->data_init;
}
if (popts->sdram_type == SDRAM_TYPE_DDR3) {
obc_cfg = popts->otf_burst_chop_en;
md_en = popts->mirrored_dimm;
}
x4_en = popts->x4_en ? 1 : 0;
ddr->ddr_sdram_cfg_2 = (((dll_rst_dis & 0x1) << 29)
| ((dqs_cfg & 0x3) << 26)
| ((odt_cfg & 0x3) << 21)
| ((num_pr & 0xf) << 12)
| (x4_en << 10)
| ((obc_cfg & 0x1) << 6)
| ((d_init & 0x1) << 4)
| ((rcw_en & 0x1) << 2)
| ((md_en & 0x1) << 0)
);
}
static void set_ddr_sdram_mode_2(struct fsl_ddr_cfg_regs_s *ddr,
const struct memctl_options_s *popts,
const struct common_timing_params_s *dimm)
{
uint16_t esdmode2;
uint32_t rtt_wr, srt = 0, cwl;
cwl = compute_cas_write_latency() - 5;
if (popts->rtt_override)
rtt_wr = popts->rtt_wr_override_value;
else
rtt_wr = popts->cs_local_opts[0].odt_rtt_wr;
if (dimm->extended_op_srt)
srt = dimm->extended_op_srt;
esdmode2 = (((rtt_wr & 0x3) << 9)
| ((srt & 0x1) << 7)
| ((cwl & 0x7) << 3)
);
ddr->ddr_sdram_mode_2 = (esdmode2 & 0xffff) << 16;
}
static void
set_ddr_sdram_interval(struct fsl_ddr_cfg_regs_s *ddr,
const struct memctl_options_s *popts,
const struct common_timing_params_s *dimm)
{
uint32_t refint, bstopre;
refint = picos_to_mclk(dimm->refresh_rate_ps);
/* Precharge interval */
bstopre = popts->bstopre;
ddr->ddr_sdram_interval = (((refint & 0xFFFF) << 16)
| ((bstopre & 0x3FFF) << 0));
}
void set_ddr3_sdram_mode(struct fsl_ddr_cfg_regs_s *ddr,
const struct memctl_options_s *popts,
const struct common_timing_params_s *dimm,
uint32_t cas_latency, uint32_t additive_latency)
{
uint16_t esdmode, sdmode;
/* Mode Register - MR1 */
uint32_t rtt, al;
/* Mode Register - MR0 */
uint32_t dll_on, wr = 0, dll_rst, mode, caslat = 4, bt, bl, 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};
uint8_t cas_latency_table[] = { /* From 5 to 16 clocks */
0x2, 0x4, 0x6, 0x8, 0xa, 0xc, 0xe, 0x1, 0x3, 0x5, 0x7, 0x9,
};
const unsigned int mclk_ps = get_memory_clk_period_ps();
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;
else if (additive_latency == (cas_latency - 2))
al = 2;
else
al = 0;
/*
* 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 wrlvl_en is set to 0 here.
*/
esdmode = (((rtt & 0x4) << 7)
| ((rtt & 0x2) << 5)
| ((al & 0x3) << 3)
| ((rtt & 0x1) << 2)
);
/*
* DLL control for precharge PD
* 0=slow exit DLL off (tXPDLL)
* 1=fast exit DLL on (tXP)
*/
dll_on = 1;
wr_mclk = (dimm->tWR_ps + mclk_ps - 1) / mclk_ps;
if (wr_mclk <= 16)
wr = wr_table[wr_mclk - 5];
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)
caslat = cas_latency_table[cas_latency - 5];
/* BT: Burst Type (0=Nibble Sequential, 1=Interleaved) */
bt = 0;
switch (popts->burst_length) {
case DDR_BL8:
bl = 0;
break;
case DDR_OTF:
bl = 1;
break;
case DDR_BC4:
bl = 2;
break;
default:
bl = 1;
break;
}
sdmode = (((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 = (((esdmode & 0xffff) << 16)
| ((sdmode & 0xffff) << 0)
);
}
void set_ddr2_sdram_mode(struct fsl_ddr_cfg_regs_s *ddr,
const struct memctl_options_s *popts,
const struct common_timing_params_s *dimm,
uint32_t cas_latency, uint32_t additive_latency)
{
uint16_t esdmode, sdmode;
uint32_t dqs_en, rtt, al, wr, bl;
const uint32_t mclk_ps = get_memory_clk_period_ps();
/* DQS# Enable: 0=enable, 1=disable */
dqs_en = !popts->DQS_config;
/* Posted CAS# additive latency (AL) */
al = additive_latency;
/* Internal Termination Resistor */
if (popts->rtt_override)
rtt = popts->rtt_override_value;
else
rtt = popts->cs_local_opts[0].odt_rtt_norm;
/*
* Extended SDRAM mode.
* The variable also selects:
* - OCD set to exit mode
* - all outputs bit i.e DQ, DQS, RDQS output enabled
* - RDQS ball disabled
* - DQS ball enabled
* - DLL enabled
* - Output drive strength: full strength.
*/
esdmode = (((dqs_en & 0x1) << 10)
| ((rtt & 0x2) << 5)
| ((al & 0x7) << 3)
| ((rtt & 0x1) << 2));
/* Write recovery */
wr = ((dimm->tWR_ps + mclk_ps - 1) / mclk_ps) - 1;
switch (popts->burst_length) {
case DDR_BL4:
bl = 2;
break;
case DDR_BL8:
bl = 3;
break;
default:
bl = 2;
break;
}
/* SDRAM mode
* The variable also selects:
* - power down mode: fast exit (normal)
* - DLL reset disabled.
* - burst type: sequential
*/
sdmode = (((wr & 0x7) << 9)
| ((cas_latency & 0x7) << 4)
| ((bl & 0x7) << 0));
ddr->ddr_sdram_mode = (((esdmode & 0xFFFF) << 16)
| ((sdmode & 0xFFFF) << 0));
}
void set_ddrx_sdram_mode(struct fsl_ddr_cfg_regs_s *ddr,
const struct memctl_options_s *popts,
const struct common_timing_params_s *dimm,
uint32_t cas_latency, uint32_t additive_latency)
{
if (popts->sdram_type == SDRAM_TYPE_DDR2)
set_ddr2_sdram_mode(ddr, popts, dimm, cas_latency,
additive_latency);
else
set_ddr3_sdram_mode(ddr, popts, dimm, cas_latency,
additive_latency);
}
uint32_t check_fsl_memctl_config_regs(const struct fsl_ddr_cfg_regs_s *ddr)
{
/*
* DDR_SDRAM_CFG[RD_EN] and DDR_SDRAM_CFG[2T_EN should not
* be set at the same time.
*/
if ((ddr->ddr_sdram_cfg & 0x10000000) &&
(ddr->ddr_sdram_cfg & 0x00008000))
return 1;
return 0;
}
static void set_timing_cfg_4(struct fsl_ddr_cfg_regs_s *ddr,
const struct memctl_options_s *popts)
{
uint32_t rrt = 0, wwt = 0, dll_lock = 1;
if (popts->burst_length != DDR_BL8)
rrt = wwt = 2;
ddr->timing_cfg_4 = (((rrt & 0xf) << 20)
| ((wwt & 0xf) << 16)
| (dll_lock & 0x3)
);
}
static void set_timing_cfg_5(struct fsl_ddr_cfg_regs_s *ddr,
const struct memctl_options_s *popts,
uint32_t cas_latency)
{
uint32_t rodt_on, rodt_off = 4, wodt_on = 1, wodt_off = 4;
/* rodt_on = timing_cfg_1[caslat] - timing_cfg_2[wrlat] + 1 */
rodt_on = cas_latency - ((ddr->timing_cfg_2 & 0x00780000) >> 19) + 1;
ddr->timing_cfg_5 = (((rodt_on & 0x1f) << 24)
| ((rodt_off & 0x7) << 20)
| ((wodt_on & 0x1f) << 12)
| ((wodt_off & 0x7) << 8)
);
}
static void set_ddr_zq_cntl(struct fsl_ddr_cfg_regs_s *ddr, uint32_t zq_en)
{
uint32_t zqinit = 0, zqoper = 0, zqcs = 0;
if (zq_en) {
zqinit = 9;
zqoper = 8;
zqcs = 6;
}
ddr->ddr_zq_cntl = (((zq_en & 0x1) << 31)
| ((zqinit & 0xf) << 24)
| ((zqoper & 0xf) << 16)
| ((zqcs & 0xf) << 8)
);
}
static void set_ddr_wrlvl_cntl(struct fsl_ddr_cfg_regs_s *ddr,
uint32_t wrlvl_en, const struct memctl_options_s *popts)
{
uint32_t wrlvl_mrd = 0, wrlvl_odten = 0, wrlvl_dqsen = 0,
wrlvl_wlr = 0, wrlvl_start = 0, wrlvl_smpl = 0;
/* Enable write leveling for DDR3 due to fly-by topology */
if (wrlvl_en) {
wrlvl_mrd = 0x6;
wrlvl_odten = 0x7;
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
* Set it to 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;
if (popts->wrlvl_override) {
wrlvl_smpl = popts->wrlvl_sample;
wrlvl_start = popts->wrlvl_start;
}
}
ddr->ddr_wrlvl_cntl = (((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)
);
}
uint32_t
compute_fsl_memctl_config_regs(const struct memctl_options_s *popts,
struct fsl_ddr_cfg_regs_s *ddr,
const struct common_timing_params_s *dimm,
const struct dimm_params_s *dimmp,
uint32_t dbw_cap_adj)
{
struct ddr_board_info_s *binfo = popts->board_info;
uint32_t cas_latency, additive_latency, i, cs_per_dimm,
dimm_number, zq_en, wrlvl_en, sr_it = 0;
uint64_t ea, sa, rank_density;
if (dimm == NULL)
return 1;
memset(ddr, 0, sizeof(struct fsl_ddr_cfg_regs_s));
/* Process overrides first. */
if (popts->cas_latency_override)
cas_latency = popts->cas_latency_override_value;
else
cas_latency = dimm->lowest_common_SPD_caslat;
if (popts->additive_latency_override)
additive_latency = popts->additive_latency_override_value;
else
additive_latency = dimm->additive_latency;
if (popts->auto_self_refresh_en)
sr_it = popts->sr_it;
/* Chip Select Memory Bounds (CSn_BNDS) */
for (i = 0; i < binfo->cs_per_ctrl; i++) {
cs_per_dimm = binfo->cs_per_ctrl / binfo->dimm_slots_per_ctrl;
dimm_number = i / cs_per_dimm;
rank_density =
dimmp[dimm_number].rank_density >> dbw_cap_adj;
if (dimmp[dimm_number].n_ranks == 0)
continue;
sa = dimmp[dimm_number].base_address;
ea = sa + rank_density - 1;
if (dimmp[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;
}
sa >>= 24;
ea >>= 24;
ddr->cs[i].bnds =
(((sa & 0xffff) << 16) | ((ea & 0xffff) << 0));
set_csn_config(dimm_number, i, ddr, popts, dimmp);
}
set_timing_cfg_0(ddr, popts, dimmp);
set_timing_cfg_3(ddr, popts, dimm, cas_latency, additive_latency);
set_timing_cfg_1(ddr, popts, dimm, cas_latency);
set_timing_cfg_2(ddr, popts, dimm, cas_latency, additive_latency);
ddr->ddr_cdr1 = popts->ddr_cdr1;
ddr->ddr_cdr1 = popts->ddr_cdr2;
set_ddr_sdram_cfg(ddr, popts, dimm);
set_ddr_sdram_cfg_2(ddr, popts);
set_ddrx_sdram_mode(ddr, popts, dimm, cas_latency, additive_latency);
if (popts->sdram_type == SDRAM_TYPE_DDR3) {
set_ddr_sdram_mode_2(ddr, popts, dimm);
set_timing_cfg_4(ddr, popts);
set_timing_cfg_5(ddr, popts, cas_latency);
zq_en = (popts->zq_en) ? 1 : 0;
set_ddr_zq_cntl(ddr, zq_en);
wrlvl_en = (popts->wrlvl_en) ? 1 : 0;
set_ddr_wrlvl_cntl(ddr, wrlvl_en, popts);
}
set_ddr_sdram_interval(ddr, popts, dimm);
ddr->ddr_data_init = popts->data_init;
ddr->ddr_sdram_clk_cntl = (popts->clk_adjust & 0xF) << 23;
ddr->ddr_sr_cntr = (sr_it & 0xf) << 16;
return check_fsl_memctl_config_regs(ddr);
}
View Git Blame Copy Permalink