/*
- * Copyright 2009-2010 Freescale Semiconductor, Inc.
+ * 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
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.
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;
+ ulong ddr_freq, ddr_freq_mhz;
+
+ ddr_freq = get_ddr_freq(0);
+ ddr_freq_mhz = ddr_freq / 1000000;
- get_sys_info(&sysinfo);
printf("Configuring DDR for %s MT/s data rate\n",
- strmhz(buf, sysinfo.freqDDRBus));
+ strmhz(buf, ddr_freq));
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)) {
+ if ((ddr_freq_mhz > fixed_ddr_parm_0[i].min_freq) &&
+ (ddr_freq_mhz <= fixed_ddr_parm_0[i].max_freq)) {
memcpy(&ddr_cfg_regs,
fixed_ddr_parm_0[i].ddr_settings,
sizeof(ddr_cfg_regs));
if (fixed_ddr_parm_0[i].max_freq == 0)
panic("Unsupported DDR data rate %s MT/s data rate\n",
- strmhz(buf, sysinfo.freqDDRBus));
+ strmhz(buf, ddr_freq));
ddr_size = (phys_size_t) CONFIG_SYS_SDRAM_SIZE * 1024 * 1024;
+ ddr_cfg_regs.ddr_cdr1 = DDR_CDR1_DHC_EN;
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));
+ ddr_cfg_regs.ddr_cdr1 = DDR_CDR1_DHC_EN;
fsl_ddr_set_memctl_regs(&ddr_cfg_regs, 1);
#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 wrlvl_start;
u32 cpo;
u32 write_data_delay;
u32 force_2T;
/* 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 0
+ * lo| hi| num| clk| wrlvl | cpo |wrdata|2T
+ * mhz| mhz|ranks|adjst| start | delay|
+ */
+ { 0, 850, 4, 4, 6, 0xff, 2, 0},
+ {851, 950, 4, 5, 7, 0xff, 2, 0},
+ {951, 1050, 4, 5, 8, 0xff, 2, 0},
+ {1051, 1250, 4, 5, 10, 0xff, 2, 0},
+ {1251, 1350, 4, 5, 11, 0xff, 2, 0},
+ { 0, 850, 2, 5, 6, 0xff, 2, 0},
+ {851, 950, 2, 5, 7, 0xff, 2, 0},
+ {951, 1050, 2, 5, 7, 0xff, 2, 0},
+ {1051, 1250, 2, 4, 6, 0xff, 2, 0},
+ {1251, 1350, 2, 5, 7, 0xff, 2, 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}
+ /*
+ * memory controller 1
+ * lo| hi| num| clk| wrlvl | cpo |wrdata|2T
+ * mhz| mhz|ranks|adjst| start | delay|
+ */
+ { 0, 850, 4, 4, 6, 0xff, 2, 0},
+ {851, 950, 4, 5, 7, 0xff, 2, 0},
+ {951, 1050, 4, 5, 8, 0xff, 2, 0},
+ {1051, 1250, 4, 5, 10, 0xff, 2, 0},
+ {1251, 1350, 4, 5, 11, 0xff, 2, 0},
+ { 0, 850, 2, 5, 6, 0xff, 2, 0},
+ {851, 950, 2, 5, 7, 0xff, 2, 0},
+ {951, 1050, 2, 5, 7, 0xff, 2, 0},
+ {1051, 1250, 2, 4, 6, 0xff, 2, 0},
+ {1251, 1350, 2, 5, 7, 0xff, 2, 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 */
+ ddr_freq <= pbsp->datarate_mhz_high &&
+ pdimm[0].n_ranks == pbsp->n_ranks) {
+ popts->cpo_override = pbsp->cpo;
+ popts->write_data_delay = pbsp->write_data_delay;
+ popts->clk_adjust = pbsp->clk_adjust;
+ popts->wrlvl_start = pbsp->wrlvl_start;
popts->twoT_en = pbsp->force_2T;
}
pbsp++;
* Write leveling override
*/
popts->wrlvl_override = 1;
- popts->wrlvl_sample = 0xa;
- popts->wrlvl_start = 0x7;
+ popts->wrlvl_sample = 0xf;
+
/*
* 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 */
+ popts->rtt_override = 0;
/* Enable ZQ calibration */
popts->zq_en = 1;
+
+ /* DHC_EN =1, ODT = 60 Ohm */
+ popts->ddr_cdr1 = DDR_CDR1_DHC_EN;
+
+ /* override SPD values. rcw_2 should vary at differnt speed */
+ if (pdimm[0].n_ranks == 4) {
+ popts->rcw_override = 1;
+ popts->rcw_1 = 0x000a5a00;
+ if (ddr_freq <= 800)
+ popts->rcw_2 = 0x00000000;
+ else if (ddr_freq <= 1066)
+ popts->rcw_2 = 0x00100000;
+ else if (ddr_freq <= 1333)
+ popts->rcw_2 = 0x00200000;
+ else
+ popts->rcw_2 = 0x00300000;
+ }
}
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) {
+ if (fsl_use_spd()) {
puts("using SPD\n");
dram_size = fsl_ddr_sdram();
} else {
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