308 lines
8.5 KiB
C
308 lines
8.5 KiB
C
/*
|
|
* Copyright 2009-2011 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
|
|
* 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;
|
|
|
|
puts("Initializing....");
|
|
|
|
if (fsl_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;
|
|
}
|