summaryrefslogtreecommitdiff
path: root/src
diff options
context:
space:
mode:
Diffstat (limited to 'src')
-rw-r--r--src/soc/nvidia/tegra132/sdram.c57
1 files changed, 48 insertions, 9 deletions
diff --git a/src/soc/nvidia/tegra132/sdram.c b/src/soc/nvidia/tegra132/sdram.c
index 0b1edf10f9..c1d178ed2e 100644
--- a/src/soc/nvidia/tegra132/sdram.c
+++ b/src/soc/nvidia/tegra132/sdram.c
@@ -475,7 +475,10 @@ static void sdram_set_clock_enable_signal(const struct sdram_params *param,
(param->EmcDevSelect << EMC_NOP_NOP_DEV_SELECTN_SHIFT)),
&regs->nop,
EMC_NOP_NOP_CMD_MASK | EMC_NOP_NOP_DEV_SELECTN_MASK);
+}
+static void sdram_init_ddr3(const struct sdram_params *param, struct tegra_emc_regs *regs)
+{
/* Write mode registers */
writel(param->EmcEmrs2, &regs->emrs2);
writel(param->EmcEmrs3, &regs->emrs3);
@@ -483,7 +486,44 @@ static void sdram_set_clock_enable_signal(const struct sdram_params *param,
writel(param->EmcMrs, &regs->mrs);
if (param->EmcExtraModeRegWriteEnable) {
- writel(param->EmcMrwExtra, &regs->mrs);
+ writel(param->EmcMrsExtra, &regs->mrs);
+ }
+
+ writel(param->EmcZcalInitDev0, &regs->zq_cal);
+ udelay(param->EmcZcalInitWait);
+
+ if ((param->EmcDevSelect & 2) == 0) {
+ writel(param->EmcZcalInitDev1, &regs->zq_cal);
+ udelay(param->EmcZcalInitWait);
+ }
+}
+
+static void sdram_init_lpddr3(const struct sdram_params *param, struct tegra_emc_regs *regs)
+{
+ /* Precharge all banks. DEV_SELECTN = 0 => Select all devices */
+ writel(((param->EmcDevSelect << EMC_REF_DEV_SELECTN_SHIFT) | 1), &regs->pre);
+
+ /* Send Reset MRW command */
+ writel(param->EmcMrwResetCommand, &regs->mrw);
+ udelay(param->EmcMrwResetNInitWait);
+
+ writel(param->EmcZcalInitDev0, &regs->mrw);
+ udelay(param->EmcZcalInitWait);
+
+ if ((param->EmcDevSelect & 2) == 0)
+ {
+ writel(param->EmcZcalInitDev1, &regs->mrw);
+ udelay(param->EmcZcalInitWait);
+ }
+
+ /* Write mode registers */
+ writel(param->EmcMrw2, &regs->mrw2);
+ writel(param->EmcMrw1, &regs->mrw);
+ writel(param->EmcMrw3, &regs->mrw3);
+ writel(param->EmcMrw4, &regs->mrw4);
+
+ if (param->EmcExtraModeRegWriteEnable) {
+ writel(param->EmcMrwExtra, &regs->mrw);
}
}
@@ -493,14 +533,12 @@ static void sdram_init_zq_calibration(const struct sdram_params *param,
if ((param->EmcZcalWarmColdBootEnables &
EMC_ZCAL_WARM_COLD_BOOT_ENABLES_COLDBOOT_MASK) == 1) {
/* Need to initialize ZCAL on coldboot. */
- writel(param->EmcZcalInitDev0, &regs->zq_cal);
- udelay(param->EmcZcalInitWait);
-
- if ((param->EmcDevSelect & 2) == 0) {
- writel(param->EmcZcalInitDev1, &regs->zq_cal);
- udelay(param->EmcZcalInitWait);
- }
+ if (param->MemoryType == NvBootMemoryType_Ddr3)
+ sdram_init_ddr3(param, regs);
+ else if (param->MemoryType == NvBootMemoryType_LpDdr2)
+ sdram_init_lpddr3(param, regs);
} else {
+ /* Wait for DLL stablization time even without ZCAL */
udelay(param->EmcZcalInitWait);
}
}
@@ -573,7 +611,8 @@ void sdram_init(const struct sdram_params *param)
param->MemoryType, clock_get_pll_input_khz() *
param->PllMFeedbackDivider / param->PllMInputDivider /
(1 + param->PllMSelectDiv2));
- if (param->MemoryType != NvBootMemoryType_Ddr3)
+ if (param->MemoryType != NvBootMemoryType_Ddr3 &&
+ param->MemoryType != NvBootMemoryType_LpDdr2)
die("Unsupported memory type!\n");
sdram_configure_pmc(param, pmc);