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nb/intel/sandybridge/raminit: Do code cleanup 

Simplify calculation of value.

Tested on Lenovo T520 and DDR3-1600 DIMM (RMT3170eb86e9w16).

Change-Id: I3ecd12c431b46a8d2218f33d7eb3e10de3bcd61d
Signed-off-by: Patrick Rudolph <siro@das-labor.org>
Reviewed-on: https://review.coreboot.org/15181
Tested-by: build bot (Jenkins)
Reviewed-by: Alexander Couzens <lynxis@fe80.eu>
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
This commit is contained in:
Patrick Rudolph 2016-06-14 18:44:28 +02:00 committed by Martin Roth
parent 7bddd30e94
commit b7b1b2884f
1 changed files with 3 additions and 6 deletions
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9
src/northbridge/intel/sandybridge/raminit.c
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@ -657,7 +657,6 @@ static void dram_timing(ramctr_timing * ctrl)
ctrl->timC_offset[1] = 7;
ctrl->timC_offset[2] = 7;
ctrl->reg_c14_offset = 16;
ctrl->reg_5064b0 = 0x218;
ctrl->reg_320c_range_threshold = 13;
} else if (ctrl->tCK <= TCK_933MHZ) {
ctrl->tCK = TCK_933MHZ;
@ -668,7 +667,6 @@ static void dram_timing(ramctr_timing * ctrl)
ctrl->timC_offset[1] = 6;
ctrl->timC_offset[2] = 6;
ctrl->reg_c14_offset = 14;
ctrl->reg_5064b0 = 0x1d5;
ctrl->reg_320c_range_threshold = 15;
} else if (ctrl->tCK <= TCK_800MHZ) {
ctrl->tCK = TCK_800MHZ;
@ -679,7 +677,6 @@ static void dram_timing(ramctr_timing * ctrl)
ctrl->timC_offset[1] = 5;
ctrl->timC_offset[2] = 5;
ctrl->reg_c14_offset = 12;
ctrl->reg_5064b0 = 0x193;
ctrl->reg_320c_range_threshold = 15;
} else if (ctrl->tCK <= TCK_666MHZ) {
ctrl->tCK = TCK_666MHZ;
@ -690,7 +687,6 @@ static void dram_timing(ramctr_timing * ctrl)
ctrl->timC_offset[1] = 4;
ctrl->timC_offset[2] = 4;
ctrl->reg_c14_offset = 10;
ctrl->reg_5064b0 = 0x150;
ctrl->reg_320c_range_threshold = 16;
} else if (ctrl->tCK <= TCK_533MHZ) {
ctrl->tCK = TCK_533MHZ;
@ -701,7 +697,6 @@ static void dram_timing(ramctr_timing * ctrl)
ctrl->timC_offset[1] = 3;
ctrl->timC_offset[2] = 3;
ctrl->reg_c14_offset = 8;
ctrl->reg_5064b0 = 0x10d;
ctrl->reg_320c_range_threshold = 17;
} else {
ctrl->tCK = TCK_400MHZ;
@ -712,10 +707,12 @@ static void dram_timing(ramctr_timing * ctrl)
ctrl->timC_offset[1] = 2;
ctrl->timC_offset[2] = 2;
ctrl->reg_c14_offset = 8;
ctrl->reg_5064b0 = 0xcd;
ctrl->reg_320c_range_threshold = 17;
}
/* DLL_CONFIG_MDLL_W_TIMER */
ctrl->reg_5064b0 = (128000 / ctrl->tCK) + 3;
val32 = (1000 << 8) / ctrl->tCK;
printk(BIOS_DEBUG, "Selected DRAM frequency: %u MHz\n", val32);