static void program_ddr0_43(unsigned long dimm_ranks[],
unsigned char const iic0_dimm_addr[],
unsigned long num_dimm_banks,
unsigned long sdram_freq,
unsigned long cols, unsigned long banks)
{
unsigned long dimm_num;
unsigned long t_wr_ps = 0;
unsigned long t_wr_clk;
u32 ddr0_43 = DDR0_43_APREBIT_ENCODE(10) |
DDR0_43_COLUMN_SIZE_ENCODE(12 - cols) |
DDR0_43_EIGHT_BANK_MODE_ENCODE(8 == banks ? 1 : 0);
/*------------------------------------------------------------------
* Handle the timing. We need to find the worst case timing of all
* the dimm modules installed.
*-----------------------------------------------------------------*/
/* loop through all the DIMM slots on the board */
for (dimm_num = 0; dimm_num < num_dimm_banks; dimm_num++) {
/* If a dimm is installed in a particular slot ... */
if (dimm_ranks[dimm_num]) {
unsigned long ps;
ps = 250 * spd_read(iic0_dimm_addr[dimm_num], 36);
t_wr_ps = max(t_wr_ps, ps);
}
}
debug("t_wr_ps = %d\n", t_wr_ps);
t_wr_clk = (MULDIV64(sdram_freq, t_wr_ps, ONE_BILLION) + 999) / 1000;
mtsdram(DDR0_43, ddr0_43 | DDR0_43_TWR_ENCODE(t_wr_clk));
}
/*
* initdram -- 440EPx's DDR controller is a DENALI Core
*/
int initdram_by_rb(int rows, int banks)
{
ulong speed = get_bus_freq(0);
mtsdram(DDR0_02, 0x00000000);
mtsdram(DDR0_00, 0x0000190A);
mtsdram(DDR0_01, 0x01000000);
mtsdram(DDR0_03, 0x02030602);
mtsdram(DDR0_04, 0x0A020200);
mtsdram(DDR0_05, 0x02020308);
mtsdram(DDR0_06, 0x0102C812);
mtsdram(DDR0_07, 0x000D0100);
mtsdram(DDR0_08, 0x02430001);
mtsdram(DDR0_09, 0x00011D5F);
mtsdram(DDR0_10, 0x00000100);
mtsdram(DDR0_11, 0x0027C800);
mtsdram(DDR0_12, 0x00000003);
mtsdram(DDR0_14, 0x00000000);
mtsdram(DDR0_17, 0x19000000);
mtsdram(DDR0_18, 0x19191919);
mtsdram(DDR0_19, 0x19191919);
mtsdram(DDR0_20, 0x0B0B0B0B);
mtsdram(DDR0_21, 0x0B0B0B0B);
mtsdram(DDR0_22, 0x00267F0B);
mtsdram(DDR0_23, 0x00000000);
mtsdram(DDR0_24, 0x01010002);
if (speed > 133333334)
mtsdram(DDR0_26, 0x5B26050C);
else
mtsdram(DDR0_26, 0x5B260408);
mtsdram(DDR0_27, 0x0000682B);
mtsdram(DDR0_28, 0x00000000);
mtsdram(DDR0_31, 0x00000000);
mtsdram(DDR0_42,
DDR0_42_ADDR_PINS_DECODE(14 - rows) |
0x00000006);
mtsdram(DDR0_43,
DDR0_43_EIGHT_BANK_MODE_ENCODE(8 == banks ? 1 : 0) |
0x030A0200);
mtsdram(DDR0_44, 0x00000003);
mtsdram(DDR0_02, 0x00000001);
denali_wait_for_dlllock();
#ifdef CONFIG_DDR_DATA_EYE
/*
* Perform data eye search if requested.
*/
denali_core_search_data_eye();
#endif
/*
* Clear possible errors resulting from data-eye-search.
* If not done, then we could get an interrupt later on when
* exceptions are enabled.
*/
set_mcsr(get_mcsr());
return 0;
}
