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/*
* (C) Copyright 2008-2009
* Stefan Roese, DENX Software Engineering, sr@denx.de.
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <asm/ppc4xx.h>
#include <asm/io.h>
#include <asm/processor.h>
/*
* This code can configure those two Crucial SODIMM's:
*
* Crucial CT6464AC667.4FE - 512MB SO-DIMM (single rank)
* Crucial CT6464AC667.8FB - 512MB SO-DIMM (dual rank)
*
*/
#define TEST_ADDR 0x10000000
#define TEST_MAGIC 0x11223344
static void wait_init_complete(void)
{
u32 val;
do {
mfsdram(SDRAM_MCSTAT, val);
} while (!(val & 0x80000000));
}
static void ddr_start(void)
{
mtsdram(SDRAM_MCOPT2, 0x28000000);
wait_init_complete();
}
static void ddr_init_common(void)
{
/*
* Reset the DDR-SDRAM controller.
*/
mtsdr(SDR0_SRST, SDR0_SRST0_DMC);
mtsdr(SDR0_SRST, 0x00000000);
/*
* These values are cloned from a running NOR booting
* Canyonlands with SPD-DDR2 detection and calibration
* enabled. This will only work for the same memory
* configuration as used here:
*
*/
mtsdram(SDRAM_MCOPT2, 0x00000000);
mtsdram(SDRAM_MODT0, 0x01000000);
mtsdram(SDRAM_WRDTR, 0x82000823);
mtsdram(SDRAM_CLKTR, 0x40000000);
mtsdram(SDRAM_MB0CF, 0x00000201);
mtsdram(SDRAM_RTR, 0x06180000);
mtsdram(SDRAM_SDTR1, 0x80201000);
mtsdram(SDRAM_SDTR2, 0x42103243);
mtsdram(SDRAM_SDTR3, 0x0A0D0D16);
mtsdram(SDRAM_MMODE, 0x00000632);
mtsdram(SDRAM_MEMODE, 0x00000040);
mtsdram(SDRAM_INITPLR0, 0xB5380000);
mtsdram(SDRAM_INITPLR1, 0x82100400);
mtsdram(SDRAM_INITPLR2, 0x80820000);
mtsdram(SDRAM_INITPLR3, 0x80830000);
mtsdram(SDRAM_INITPLR4, 0x80810040);
mtsdram(SDRAM_INITPLR5, 0x80800532);
mtsdram(SDRAM_INITPLR6, 0x82100400);
mtsdram(SDRAM_INITPLR7, 0x8A080000);
mtsdram(SDRAM_INITPLR8, 0x8A080000);
mtsdram(SDRAM_INITPLR9, 0x8A080000);
mtsdram(SDRAM_INITPLR10, 0x8A080000);
mtsdram(SDRAM_INITPLR11, 0x80000432);
mtsdram(SDRAM_INITPLR12, 0x808103C0);
mtsdram(SDRAM_INITPLR13, 0x80810040);
mtsdram(SDRAM_RDCC, 0x40000000);
mtsdram(SDRAM_RQDC, 0x80000038);
mtsdram(SDRAM_RFDC, 0x00000257);
mtdcr(SDRAM_R0BAS, 0x0000F800); /* MQ0_B0BAS */
}
phys_size_t initdram(int board_type)
{
/*
* First try init for this module:
*
* Crucial CT6464AC667.8FB - 512MB SO-DIMM (dual rank)
*/
ddr_init_common();
/*
* Crucial CT6464AC667.8FB - 512MB SO-DIMM
*/
mtdcr(SDRAM_R0BAS, 0x0000F800);
mtdcr(SDRAM_R1BAS, 0x0400F800);
mtsdram(SDRAM_MCOPT1, 0x05122000);
mtsdram(SDRAM_CODT, 0x02800021);
mtsdram(SDRAM_MB1CF, 0x00000201);
ddr_start();
/*
* Now test if the dual-ranked module is really installed
* by checking an address in the upper 256MByte region
*/
out_be32((void *)TEST_ADDR, TEST_MAGIC);
if (in_be32((void *)TEST_ADDR) != TEST_MAGIC) {
/*
* The test failed, so we assume that the single
* ranked module is installed:
*
* Crucial CT6464AC667.4FE - 512MB SO-DIMM (single rank)
*/
ddr_init_common();
mtdcr(SDRAM_R0BAS, 0x0000F000);
mtsdram(SDRAM_MCOPT1, 0x05322000);
mtsdram(SDRAM_CODT, 0x00800021);
ddr_start();
}
return CONFIG_SYS_MBYTES_SDRAM << 20;
}
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