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mpc83xx: Correct the burst length for DDR2 with 32 bits 

The burst length should be 4 for DDR2 with 32 bits bus

Signed-off-by: Dave Liu <daveliu@freescale.com>
This commit is contained in:
Dave Liu 2007-08-04 13:37:39 +08:00 committed by Kim Phillips
parent 1c274c4e05
commit 036575c544
1 changed files with 10 additions and 3 deletions
cpu/mpc83xx
spd_sdram.c

13
cpu/mpc83xx/spd_sdram.c
View File

@ -574,7 +574,10 @@ long int spd_sdram()
/* Check DIMM data bus width */
if (spd.dataw_lsb == 0x20) {
burstlen = 0x03; /* 32 bit data bus, burst len is 8 */
if (spd.mem_type == SPD_MEMTYPE_DDR)
burstlen = 0x03; /* 32 bit data bus, burst len is 8 */
if (spd.mem_type == SPD_MEMTYPE_DDR2)
burstlen = 0x02; /* 32 bit data bus, burst len is 4 */
printf("\n DDR DIMM: data bus width is 32 bit");
} else {
burstlen = 0x02; /* Others act as 64 bit bus, burst len is 4 */
@ -730,8 +733,12 @@ long int spd_sdram()
sdram_cfg |= 0x10000000;
/* The DIMM is 32bit width */
if (spd.dataw_lsb == 0x20)
sdram_cfg |= 0x000C0000;
if (spd.dataw_lsb == 0x20) {
if (spd.mem_type == SPD_MEMTYPE_DDR)
sdram_cfg |= 0x000C0000;
if (spd.mem_type == SPD_MEMTYPE_DDR2)
sdram_cfg |= 0x00080000;
}
ddrc_ecc_enable = 0;