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u-boot/arch/powerpc/cpu/mpc8xxx/ddr/ctrl_regs.c
York Sun d29d17d7ba powerpc/mpc83xx: Migrate from spd_sdram to unified DDR driver 
Unified DDR driver is maintained for better performance, robustness and bug
fixes. Upgrading to use unified DDR driver for MPC83xx takes advantage of
overall improvement. It requires changes for board files to customize
platform-dependent parameters.

To utilize the unified DDR driver, a board needs to define CONFIG_FSL_DDRx
in the header file. No more boards will be accepted without such definition.

Note: the workaround for erratum DDR6 for the very old MPC834x Rev 1.0/1.1
and MPC8360 Rev 1.1/1.2 parts is not migrated to unified driver.

Signed-off-by: Kim Phillips <kim.phillips@freescale.com>
Signed-off-by: York Sun <yorksun@freescale.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
2011-09-29 19:01:06 -05:00

1627 lines
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/*
* Copyright 2008-2011 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 <common.h>
#include <asm/fsl_ddr_sdram.h>
#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 {
rcw_en = 0;
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)
#ifdef CONFIG_FSL_DDR3
| ((rcw_en & 0x1) << 2)
#endif
| ((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 < 4; 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; /* 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;
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 <= 11) {
unsigned char cas_latency_table[7] = {
0x2, /* 5 clocks */
0x4, /* 6 clocks */
0x6, /* 7 clocks */
0x8, /* 8 clocks */
0xa, /* 9 clocks */
0xc, /* 10 clocks */
0xe /* 11 clocks */
};
caslat = cas_latency_table[cas_latency - 5];
}
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)
| ((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 < 4; 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
printf("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);
}
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