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authorAlex Frid <afrid@nvidia.com>2010-08-17 18:17:25 -0700
committerYu-Huan Hsu <yhsu@nvidia.com>2010-08-20 17:29:51 -0700
commit25c3761494781a25bdd4cfb44a1dcb89f6a24d88 (patch)
treeb1a0f9cad69388f07aacd0baa9dd997556efe21a
parentab803507ac25fa252e9c26c4331926ae006b7b28 (diff)
[ARM/tegra] RM: Integrated EMC DLL process dependency.tegra-10.8.2
Implemented EMC digital DLL setting dependency on process variations and scaling frequency. Bug 722439 Change-Id: I558f2dfbfe09eb16010875f2ba8a1a963c95e50f Reviewed-on: http://git-master/r/5383 Tested-by: Aleksandr Frid <afrid@nvidia.com> Reviewed-by: Yu-Huan Hsu <yhsu@nvidia.com>
-rw-r--r--arch/arm/mach-tegra/nvrm/core/ap20/ap20rm_clock_config.c55
-rw-r--r--arch/arm/mach-tegra/nvrm/core/ap20/ap20rm_clocks.h8
2 files changed, 61 insertions, 2 deletions
diff --git a/arch/arm/mach-tegra/nvrm/core/ap20/ap20rm_clock_config.c b/arch/arm/mach-tegra/nvrm/core/ap20/ap20rm_clock_config.c
index 3a7a7bb7b921..740c5527c7d8 100644
--- a/arch/arm/mach-tegra/nvrm/core/ap20/ap20rm_clock_config.c
+++ b/arch/arm/mach-tegra/nvrm/core/ap20/ap20rm_clock_config.c
@@ -146,6 +146,8 @@ static const NvU32 s_EmcTimingRegAddrRev20[] =
EMC_CFG_CLKTRIM_2_0, /* CFG_CLKTRIM_2 */
};
+#define EMC_CFG_DIG_DLL_INDEX (37)
+
// Sorted list of timing parameters for discrete set of EMC frequencies used
// by DFS; entry 0 specifies timing parameters for PLLM0 output frequency.
static NvRmAp20EmcTimingConfig
@@ -318,10 +320,49 @@ static NvRmFreqKHz Ap20CpuToEmcRatio(NvRmFreqKHz Emc2xKHz)
#endif
}
+static NvU32 Ap20EmcDigDllUpdate(
+ NvRmDeviceHandle hRmDevice,
+ NvRmFreqKHz PllM0KHz,
+ NvRmFreqKHz PllP0KHz,
+ NvRmFreqKHz Emc2xKHz,
+ NvU32 OdmDigDll)
+{
+ NvU32 mult, offset, d;
+ NvU32 dqsib = NvRmPrivGetEmcDqsibOffset(hRmDevice);
+ NV_ASSERT(PllP0KHz < PllM0KHz);
+
+ /* Equation to determine digital dll override value based on dqsib
+ * characterization data:
+ * d = b - (m * (Emc2xMHz - PllP0MHz) / 2 / 100)), if Emc2xMHz > PllP0MHz
+ * d = b if Emc2xMHz <= PllP0Mhz
+ * Dqsib value packs 2 pairs of slope m/offset b settings. One pair ("high
+ * m, b") is applied only when undivided PLLM0 is used as a clock source.
+ * The other ("low m, b") is applied to all other clock sources.
+ */
+ if (Emc2xKHz < PllM0KHz)
+ {
+ mult = NV_DRF_VAL(EMC, DIG_DLL_OVERRIDE, LOW_KHZ_MULT, dqsib);
+ offset = NV_DRF_VAL(EMC, DIG_DLL_OVERRIDE, LOW_KHZ_OFFS, dqsib);
+ }
+ else
+ {
+ mult = NV_DRF_VAL(EMC, DIG_DLL_OVERRIDE, HIGH_KHZ_MULT, dqsib);
+ offset = NV_DRF_VAL(EMC, DIG_DLL_OVERRIDE, HIGH_KHZ_OFFS, dqsib);
+ }
+ if (Emc2xKHz < PllP0KHz)
+ Emc2xKHz = PllP0KHz;
+
+ d = ((Emc2xKHz - PllP0KHz) + 500) / 1000;
+ d = offset - (mult * d + 100) / 200;
+ d = NV_FLD_SET_DRF_NUM(EMC, CFG_DIG_DLL, CFG_DLL_OVERRIDE_VAL,
+ d, OdmDigDll);
+ return d;
+}
+
static void Ap20EmcConfigInit(NvRmDeviceHandle hRmDevice)
{
NvRmFreqKHz Emc2xKHz, SourceKHz;
- NvU32 i, j, k, Source, ConfigurationsCount, UndividedIndex;
+ NvU32 i, j, k, Source, ConfigurationsCount, UndividedIndex, dll;
NvU32 Revision = 0;
NvRmFreqKHz PllM0KHz = NvRmPrivGetClockSourceFreq(NvRmClockSource_PllM0);
@@ -421,6 +462,13 @@ static void Ap20EmcConfigInit(NvRmDeviceHandle hRmDevice)
UndividedIndex;
s_Ap20EmcConfigSortedTable[i].Emc2xKHz = Emc2xKHz;
+ // Update digital dll settings
+ dll = pEmcConfigurations[j].EmcTimingParameters[
+ EMC_CFG_DIG_DLL_INDEX];
+ s_Ap20EmcConfigSortedTable[i].EmcDigDll =
+ Ap20EmcDigDllUpdate(hRmDevice, PllM0KHz, PllP0KHz,
+ Emc2xKHz, dll);
+
/*
* The undivided table entry specifies parameters for
* EMC2xKHz = SourceKHz; the EMC divisor field is set to
@@ -492,7 +540,10 @@ Ap20EmcTimingSet(
for (i = 0; i < s_Ap20EmcConfig.EmcTimingRegNum; i++)
{
- d = pEmcConfig->pOdmEmcConfig->EmcTimingParameters[i];
+ if (i == EMC_CFG_DIG_DLL_INDEX)
+ d = pEmcConfig->EmcDigDll;
+ else
+ d = pEmcConfig->pOdmEmcConfig->EmcTimingParameters[i];
a = (((NvU32)(s_pEmcBaseReg)) + s_Ap20EmcConfig.pEmcTimingReg[i]);
NV_WRITE32(a, d);
}
diff --git a/arch/arm/mach-tegra/nvrm/core/ap20/ap20rm_clocks.h b/arch/arm/mach-tegra/nvrm/core/ap20/ap20rm_clocks.h
index f86b63d7bf1a..7fc8d645b85f 100644
--- a/arch/arm/mach-tegra/nvrm/core/ap20/ap20rm_clocks.h
+++ b/arch/arm/mach-tegra/nvrm/core/ap20/ap20rm_clocks.h
@@ -101,8 +101,16 @@ typedef struct NvRmAp20EmcTimingConfigRec
NvU32 Emc2xDivisor;
NvU32 Emc2xUndividedIndex;
NvRmFreqKHz CpuLimitKHz;
+ NvU32 EmcDigDll;
} NvRmAp20EmcTimingConfig;
+// Digital DLL override equation parameters within packed dqsib
+// characterization data
+#define EMC_DIG_DLL_OVERRIDE_0_LOW_KHZ_MULT_RANGE 7:0
+#define EMC_DIG_DLL_OVERRIDE_0_LOW_KHZ_OFFS_RANGE 15:8
+#define EMC_DIG_DLL_OVERRIDE_0_HIGH_KHZ_MULT_RANGE 23:16
+#define EMC_DIG_DLL_OVERRIDE_0_HIGH_KHZ_OFFS_RANGE 31:24
+
/*****************************************************************************/
/**