exynos5420: ddr3: Switch from 4G setup to 2G setup on exynos5420
This changes the number of chip selects that we configure from 2 to 1.
On current setups with (x16 memory 4Gbit chips) that means that we're
at 2GByte.
Technically we should add a second setting in the ares_ddr3_timings
and select between the two of the based on board strappings. That
would make the CONFIG_RUN_TIME_BANK_NUMBER would work properly. I've
changed the ddr3_mem_ctrl_init() so it should handle that, but I'm not
actually doing the board strapping read right now.
This change means that accesses to 0xA0000000 - 0xFFFFFFFF on 2G
systems will no longer put the system in a messed up state (leading to
a hang). It also prevents some of the weird boot behavior that we've
seen that comes and goes depending on U-Boot alignment. See
<http://crosbug.com/p/20577>.
This patch was ported from: https://gerrit.chromium.org/gerrit/66117
Signed-off-by: David Hendricks <dhendrix@chromium.org>
BUG=none
BRANCH=none
TEST=booted on pit, ran suspend_stress_test --memory_check ran for
100 iterations and reboot seemed fine.
Change-Id: Ib4cfe420aac30bd817438f06d01e8671afc4a27d
Reviewed-on: https://chromium-review.googlesource.com/167210
Commit-Queue: David Hendricks <dhendrix@chromium.org>
Tested-by: David Hendricks <dhendrix@chromium.org>
Reviewed-by: ron minnich <rminnich@chromium.org>
diff --git a/src/cpu/samsung/exynos5420/dmc_init_ddr3.c b/src/cpu/samsung/exynos5420/dmc_init_ddr3.c
index a758433..1126dca 100644
--- a/src/cpu/samsung/exynos5420/dmc_init_ddr3.c
+++ b/src/cpu/samsung/exynos5420/dmc_init_ddr3.c
@@ -44,7 +44,7 @@
struct exynos5_dmc *drex0, *drex1;
struct exynos5_tzasc *tzasc0, *tzasc1;
u32 val, nLockR, nLockW_phy0, nLockW_phy1;
- int i;
+ int i, chip;
phy0_ctrl = (struct exynos5_phy_control *)EXYNOS5_DMC_PHY0_BASE;
phy1_ctrl = (struct exynos5_phy_control *)EXYNOS5_DMC_PHY1_BASE;
@@ -218,12 +218,14 @@
* Send auto refresh command for DRAM refresh.
*/
for (i = 0; i < 128; i++) {
- writel(DIRECT_CMD_REFA, &drex0->directcmd);
- writel(DIRECT_CMD_REFA | (0x1 << DIRECT_CMD_CHIP_SHIFT),
- &drex0->directcmd);
- writel(DIRECT_CMD_REFA, &drex1->directcmd);
- writel(DIRECT_CMD_REFA | (0x1 << DIRECT_CMD_CHIP_SHIFT),
- &drex1->directcmd);
+ for (chip = 0; chip < mem->chips_to_configure; chip++) {
+ writel(DIRECT_CMD_REFA |
+ (chip << DIRECT_CMD_CHIP_SHIFT),
+ &drex0->directcmd);
+ writel(DIRECT_CMD_REFA |
+ (chip << DIRECT_CMD_CHIP_SHIFT),
+ &drex1->directcmd);
+ }
}
}
@@ -263,10 +265,12 @@
writel(nLockR, &phy1_ctrl->phy_con12);
val = (0x3 << DIRECT_CMD_BANK_SHIFT) | 0x4;
- writel(val, &drex0->directcmd);
- writel(val | (0x1 << DIRECT_CMD_CHIP_SHIFT), &drex0->directcmd);
- writel(val, &drex1->directcmd);
- writel(val | (0x1 << DIRECT_CMD_CHIP_SHIFT), &drex1->directcmd);
+ for (chip = 0; chip < mem->chips_to_configure; chip++) {
+ writel(val | (chip << DIRECT_CMD_CHIP_SHIFT),
+ &drex0->directcmd);
+ writel(val | (chip << DIRECT_CMD_CHIP_SHIFT),
+ &drex1->directcmd);
+ }
setbits_le32(&phy0_ctrl->phy_con2, RDLVL_GATE_EN);
setbits_le32(&phy1_ctrl->phy_con2, RDLVL_GATE_EN);
@@ -316,10 +320,12 @@
writel(0, &phy1_ctrl->phy_con14);
val = (0x3 << DIRECT_CMD_BANK_SHIFT);
- writel(val, &drex0->directcmd);
- writel(val | (0x1 << DIRECT_CMD_CHIP_SHIFT), &drex0->directcmd);
- writel(val, &drex1->directcmd);
- writel(val | (0x1 << DIRECT_CMD_CHIP_SHIFT), &drex1->directcmd);
+ for (chip = 0; chip < mem->chips_to_configure; chip++) {
+ writel(val | (chip << DIRECT_CMD_CHIP_SHIFT),
+ &drex0->directcmd);
+ writel(val | (chip << DIRECT_CMD_CHIP_SHIFT),
+ &drex1->directcmd);
+ }
/* Common Settings for Leveling */
val = PHY_CON12_RESET_VAL;
diff --git a/src/mainboard/google/kirby/memory.c b/src/mainboard/google/kirby/memory.c
index 48e5b1e..4ef418f 100644
--- a/src/mainboard/google/kirby/memory.c
+++ b/src/mainboard/google/kirby/memory.c
@@ -86,7 +86,7 @@
DMC_MEMCONTROL_ADD_LAT_PALL_CYCLE(0) |
DMC_MEMCONTROL_MEM_TYPE_DDR3 |
DMC_MEMCONTROL_MEM_WIDTH_32BIT |
- DMC_MEMCONTROL_NUM_CHIP_2 |
+ DMC_MEMCONTROL_NUM_CHIP_1 |
DMC_MEMCONTROL_BL_8 |
DMC_MEMCONTROL_PZQ_DISABLE |
DMC_MEMCONTROL_MRR_BYTE_7_0,
@@ -104,8 +104,8 @@
DMC_CONCONTROL_AREF_EN_DISABLE |
DMC_CONCONTROL_IO_PD_CON_DISABLE,
.dmc_channels = 1,
- .chips_per_channel = 2,
- .chips_to_configure = 2,
+ .chips_per_channel = 1,
+ .chips_to_configure = 1,
.send_zq_init = 1,
.gate_leveling_enable = 1,
};
diff --git a/src/mainboard/google/pit/memory.c b/src/mainboard/google/pit/memory.c
index ddd7aa0..4ac3d0c 100644
--- a/src/mainboard/google/pit/memory.c
+++ b/src/mainboard/google/pit/memory.c
@@ -86,7 +86,7 @@
DMC_MEMCONTROL_ADD_LAT_PALL_CYCLE(0) |
DMC_MEMCONTROL_MEM_TYPE_DDR3 |
DMC_MEMCONTROL_MEM_WIDTH_32BIT |
- DMC_MEMCONTROL_NUM_CHIP_2 |
+ DMC_MEMCONTROL_NUM_CHIP_1 |
DMC_MEMCONTROL_BL_8 |
DMC_MEMCONTROL_PZQ_DISABLE |
DMC_MEMCONTROL_MRR_BYTE_7_0,
@@ -104,8 +104,8 @@
DMC_CONCONTROL_AREF_EN_DISABLE |
DMC_CONCONTROL_IO_PD_CON_DISABLE,
.dmc_channels = 1,
- .chips_per_channel = 2,
- .chips_to_configure = 2,
+ .chips_per_channel = 1,
+ .chips_to_configure = 1,
.send_zq_init = 1,
.gate_leveling_enable = 1,
};
