u-boot/board/freescale/corenet_ds/ddr.c
York Sun 28a966715b Adding fixed sdram setting for cornet_ds board
800, 900, 1000, 1200MT/s data rate parameters are added for fixed sdram
setting. SPD based parameters and fixed parameters can be toggled by hwconfig.
To use fixed parameters,

hwconfig=fsl_ddr:sdram=fixed

To use SPD parameters,

hwconfig=fsl_ddr:ctlr_intlv=cacheline,bank_intlv=cs0_cs1

Signed-off-by: York Sun <yorksun@freescale.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
2010-10-20 02:38:39 -05:00

321 lines
8.8 KiB
C

/*
* Copyright 2009-2010 Freescale Semiconductor, Inc.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* Version 2 as published by the Free Software Foundation.
*/
#include <common.h>
#include <i2c.h>
#include <hwconfig.h>
#include <asm/mmu.h>
#include <asm/fsl_ddr_sdram.h>
#include <asm/fsl_ddr_dimm_params.h>
#include <asm/fsl_law.h>
DECLARE_GLOBAL_DATA_PTR;
extern void fsl_ddr_set_memctl_regs(const fsl_ddr_cfg_regs_t *regs,
unsigned int ctrl_num);
/*
* Fixed sdram init -- doesn't use serial presence detect.
*/
extern fixed_ddr_parm_t fixed_ddr_parm_0[];
#if (CONFIG_NUM_DDR_CONTROLLERS == 2)
extern fixed_ddr_parm_t fixed_ddr_parm_1[];
#endif
phys_size_t fixed_sdram(void)
{
int i;
sys_info_t sysinfo;
char buf[32];
fsl_ddr_cfg_regs_t ddr_cfg_regs;
phys_size_t ddr_size;
unsigned int lawbar1_target_id;
get_sys_info(&sysinfo);
printf("Configuring DDR for %s MT/s data rate\n",
strmhz(buf, sysinfo.freqDDRBus));
for (i = 0; fixed_ddr_parm_0[i].max_freq > 0; i++) {
if ((sysinfo.freqDDRBus > fixed_ddr_parm_0[i].min_freq) &&
(sysinfo.freqDDRBus <= fixed_ddr_parm_0[i].max_freq)) {
memcpy(&ddr_cfg_regs,
fixed_ddr_parm_0[i].ddr_settings,
sizeof(ddr_cfg_regs));
break;
}
}
if (fixed_ddr_parm_0[i].max_freq == 0)
panic("Unsupported DDR data rate %s MT/s data rate\n",
strmhz(buf, sysinfo.freqDDRBus));
ddr_size = (phys_size_t) CONFIG_SYS_SDRAM_SIZE * 1024 * 1024;
fsl_ddr_set_memctl_regs(&ddr_cfg_regs, 0);
#if (CONFIG_NUM_DDR_CONTROLLERS == 2)
memcpy(&ddr_cfg_regs,
fixed_ddr_parm_1[i].ddr_settings,
sizeof(ddr_cfg_regs));
fsl_ddr_set_memctl_regs(&ddr_cfg_regs, 1);
#endif
/*
* setup laws for DDR. If not interleaving, presuming half memory on
* DDR1 and the other half on DDR2
*/
if (fixed_ddr_parm_0[i].ddr_settings->cs[0].config & 0x20000000) {
if (set_ddr_laws(CONFIG_SYS_DDR_SDRAM_BASE,
ddr_size,
LAW_TRGT_IF_DDR_INTRLV) < 0) {
printf("ERROR setting Local Access Windows for DDR\n");
return 0;
}
} else {
#if (CONFIG_NUM_DDR_CONTROLLERS == 2)
/* We require both controllers have identical DIMMs */
lawbar1_target_id = LAW_TRGT_IF_DDR_1;
if (set_ddr_laws(CONFIG_SYS_DDR_SDRAM_BASE,
ddr_size / 2,
lawbar1_target_id) < 0) {
printf("ERROR setting Local Access Windows for DDR\n");
return 0;
}
lawbar1_target_id = LAW_TRGT_IF_DDR_2;
if (set_ddr_laws(CONFIG_SYS_DDR_SDRAM_BASE + ddr_size / 2,
ddr_size / 2,
lawbar1_target_id) < 0) {
printf("ERROR setting Local Access Windows for DDR\n");
return 0;
}
#else
lawbar1_target_id = LAW_TRGT_IF_DDR_1;
if (set_ddr_laws(CONFIG_SYS_DDR_SDRAM_BASE,
ddr_size,
lawbar1_target_id) < 0) {
printf("ERROR setting Local Access Windows for DDR\n");
return 0;
}
#endif
}
return ddr_size;
}
static void get_spd(ddr3_spd_eeprom_t *spd, unsigned char i2c_address)
{
int ret;
ret = i2c_read(i2c_address, 0, 1, (uchar *)spd, sizeof(ddr3_spd_eeprom_t));
if (ret) {
debug("DDR: failed to read SPD from address %u\n", i2c_address);
memset(spd, 0, sizeof(ddr3_spd_eeprom_t));
}
}
unsigned int fsl_ddr_get_mem_data_rate(void)
{
return get_ddr_freq(0);
}
void fsl_ddr_get_spd(ddr3_spd_eeprom_t *ctrl_dimms_spd,
unsigned int ctrl_num)
{
unsigned int i;
unsigned int i2c_address = 0;
for (i = 0; i < CONFIG_DIMM_SLOTS_PER_CTLR; i++) {
if (ctrl_num == 0 && i == 0)
i2c_address = SPD_EEPROM_ADDRESS1;
else if (ctrl_num == 1 && i == 0)
i2c_address = SPD_EEPROM_ADDRESS2;
get_spd(&(ctrl_dimms_spd[i]), i2c_address);
}
}
typedef struct {
u32 datarate_mhz_low;
u32 datarate_mhz_high;
u32 n_ranks;
u32 clk_adjust;
u32 cpo;
u32 write_data_delay;
u32 force_2T;
} board_specific_parameters_t;
/* ranges for parameters:
* wr_data_delay = 0-6
* clk adjust = 0-8
* cpo 2-0x1E (30)
*/
/* XXX: these values need to be checked for all interleaving modes. */
/* XXX: No reliable dual-rank 800 MHz setting has been found. It may
* seem reliable, but errors will appear when memory intensive
* program is run. */
/* XXX: Single rank at 800 MHz is OK. */
const board_specific_parameters_t board_specific_parameters[][30] = {
{
/* memory controller 0 */
/* lo| hi| num| clk| cpo|wrdata|2T */
/* mhz| mhz|ranks|adjst| | delay| */
{ 0, 333, 4, 6, 7, 3, 0},
{334, 400, 4, 6, 9, 3, 0},
{401, 549, 4, 6, 11, 3, 0},
{550, 680, 4, 1, 10, 5, 0},
{681, 850, 4, 1, 12, 5, 0},
{851, 1050, 4, 1, 12, 5, 0},
{1051, 1250, 4, 1, 15, 4, 0},
{1251, 1350, 4, 1, 15, 4, 0},
{ 0, 333, 2, 6, 7, 3, 0},
{334, 400, 2, 6, 9, 3, 0},
{401, 549, 2, 6, 11, 3, 0},
{550, 680, 2, 1, 10, 5, 0},
{681, 850, 2, 1, 12, 5, 0},
{851, 1050, 2, 1, 12, 5, 0},
{1051, 1250, 2, 1, 15, 4, 0},
{1251, 1350, 2, 1, 15, 4, 0},
{ 0, 333, 1, 6, 7, 3, 0},
{334, 400, 1, 6, 9, 3, 0},
{401, 549, 1, 6, 11, 3, 0},
{550, 680, 1, 1, 10, 5, 0},
{681, 850, 1, 1, 12, 5, 0}
},
{
/* memory controller 1 */
/* lo| hi| num| clk| cpo|wrdata|2T */
/* mhz| mhz|ranks|adjst| | delay| */
{ 0, 333, 4, 6, 7, 3, 0},
{334, 400, 4, 6, 9, 3, 0},
{401, 549, 4, 6, 11, 3, 0},
{550, 680, 4, 1, 10, 5, 0},
{681, 850, 4, 1, 12, 5, 0},
{851, 1050, 4, 1, 12, 5, 0},
{1051, 1250, 4, 1, 15, 4, 0},
{1251, 1350, 4, 1, 15, 4, 0},
{ 0, 333, 2, 6, 7, 3, 0},
{334, 400, 2, 6, 9, 3, 0},
{401, 549, 2, 6, 11, 3, 0},
{550, 680, 2, 1, 11, 6, 0},
{681, 850, 2, 1, 13, 6, 0},
{851, 1050, 2, 1, 13, 6, 0},
{1051, 1250, 2, 1, 15, 4, 0},
{1251, 1350, 2, 1, 15, 4, 0},
{ 0, 333, 1, 6, 7, 3, 0},
{334, 400, 1, 6, 9, 3, 0},
{401, 549, 1, 6, 11, 3, 0},
{550, 680, 1, 1, 11, 6, 0},
{681, 850, 1, 1, 13, 6, 0}
}
};
void fsl_ddr_board_options(memctl_options_t *popts,
dimm_params_t *pdimm,
unsigned int ctrl_num)
{
const board_specific_parameters_t *pbsp =
&(board_specific_parameters[ctrl_num][0]);
u32 num_params = sizeof(board_specific_parameters[ctrl_num]) /
sizeof(board_specific_parameters[0][0]);
u32 i;
ulong ddr_freq;
/* set odt_rd_cfg and odt_wr_cfg. If the there is only one dimm in
* that controller, set odt_wr_cfg to 4 for CS0, and 0 to CS1. If
* there are two dimms in the controller, set odt_rd_cfg to 3 and
* odt_wr_cfg to 3 for the even CS, 0 for the odd CS.
*/
for (i = 0; i < CONFIG_CHIP_SELECTS_PER_CTRL; i++) {
if (i&1) { /* odd CS */
popts->cs_local_opts[i].odt_rd_cfg = 0;
popts->cs_local_opts[i].odt_wr_cfg = 1;
} else { /* even CS */
if (CONFIG_DIMM_SLOTS_PER_CTLR == 1) {
popts->cs_local_opts[i].odt_rd_cfg = 0;
popts->cs_local_opts[i].odt_wr_cfg = 1;
} else if (CONFIG_DIMM_SLOTS_PER_CTLR == 2) {
popts->cs_local_opts[i].odt_rd_cfg = 3;
popts->cs_local_opts[i].odt_wr_cfg = 3;
}
}
}
/* Get clk_adjust, cpo, write_data_delay,2T, according to the board ddr
* freqency and n_banks specified in board_specific_parameters table.
*/
ddr_freq = get_ddr_freq(0) / 1000000;
for (i = 0; i < num_params; i++) {
if (ddr_freq >= pbsp->datarate_mhz_low &&
ddr_freq <= pbsp->datarate_mhz_high &&
pdimm->n_ranks == pbsp->n_ranks) {
popts->cpo_override = 0xff; /* force auto CPO calibration */
popts->write_data_delay = 2;
popts->clk_adjust = 5; /* Force value to be 5/8 clock cycle */
popts->twoT_en = pbsp->force_2T;
}
pbsp++;
}
/*
* Factors to consider for half-strength driver enable:
* - number of DIMMs installed
*/
popts->half_strength_driver_enable = 0;
/*
* Write leveling override
*/
popts->wrlvl_override = 1;
popts->wrlvl_sample = 0xa;
popts->wrlvl_start = 0x7;
/*
* Rtt and Rtt_WR override
*/
popts->rtt_override = 1;
popts->rtt_override_value = DDR3_RTT_120_OHM;
popts->rtt_wr_override_value = 0; /* Rtt_WR= dynamic ODT off */
/* Enable ZQ calibration */
popts->zq_en = 1;
}
phys_size_t initdram(int board_type)
{
phys_size_t dram_size;
int use_spd = 0;
puts("Initializing....");
#ifdef CONFIG_DDR_SPD
/* if hwconfig is not enabled, or "sdram" is not defined, use spd */
if (hwconfig_sub("fsl_ddr", "sdram")) {
if (hwconfig_subarg_cmp("fsl_ddr", "sdram", "spd"))
use_spd = 1;
else if (hwconfig_subarg_cmp("fsl_ddr", "sdram", "fixed"))
use_spd = 0;
else
use_spd = 1;
} else
use_spd = 1;
#endif
if (use_spd) {
puts("using SPD\n");
dram_size = fsl_ddr_sdram();
} else {
puts("using fixed parameters\n");
dram_size = fixed_sdram();
}
dram_size = setup_ddr_tlbs(dram_size / 0x100000);
dram_size *= 0x100000;
puts(" DDR: ");
return dram_size;
}