| Commit message (Collapse) | Author | Age | Lines |
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All the users of mx6q_4x_mt41j128.cfg (DDR3-1333H Micron MT41J128M16HA-15E or SK
hynix H5TQ2G63BFR-H9C for i.MX6Q SABRE Lite, and DDR3-1600K Micron
MT41K128M16JT-125:K for i.MX6 SABRE SD) support the optional down binning to
DDR3-1066F (CL = 7, CWL = 6), which is possible at 532 MHz, so use it.
In these conditions:
tRCD(min) = 13.125 ns
tRP(min) = 13.125 ns
tRC(min) = max(tRAS(min, DDR3-1333H), tRAS(min, DDR3-1600K)) + tRP(min)
tRAS(min, DDR3-1333H) = 36 ns
tRAS(min, DDR3-1600K) = 35 ns
MMDC1_MDCFG0.tCL should be set to 7 nCK, encoded as 0x4 in the bit-field
MMDC1_MDCFG0[3:0].
MR0.CL should be set as in MMDC1_MDCFG0.tCL, i.e. to 7 nCK, which is encoded
as 0x6 in MRS.LMR.MR0.{A6:A4, A2} and MMDC1_MDSCR[22:20, 18].
MMDC1_MDCFG1.tCWL should be set to 6 nCK, encoded as 0x4 in the bit-field
MMDC1_MDCFG1[2:0].
MMDC1_MDCFG1.tRCD should be set to 13.125 ns, which is 7 nCK at 532 MHz, encoded
as 0x6 in the bit-field MMDC1_MDCFG1[31:29].
MMDC1_MDCFG1.tRP should be set to 13.125 ns, which is 7 nCK at 532 MHz, encoded
as 0x6 in the bit-field MMDC1_MDCFG1[28:26].
MMDC1_MDCFG1.tRC should be set to 49.125 ns, which is 27 nCK at 532 MHz, encoded
as 0x1A in the bit-field MMDC1_MDCFG1[25:21].
Signed-off-by: Benoît Thébaudeau <benoit.thebaudeau@advansee.com>
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MR0.PPD should be set as in MMDCx_MDPDC.SLOW_PD, i.e. to fast-exit mode, which
is encoded as 1 in MRS.LMR.MR0.A12 and MMDCx_MDSCR[28].
Signed-off-by: Benoît Thébaudeau <benoit.thebaudeau@advansee.com>
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MMDC1_MDOR.RST_to_CKE should be set to 500 µs according to the JEDEC
specification for DDR3. With a cycle of 15.258 µs, this gives 33 cycles encoded
as 0x23 for the bit-field MMDC1_MDOR[5:0].
Signed-off-by: Benoît Thébaudeau <benoit.thebaudeau@advansee.com>
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MMDC1_MDOR.SDE_to_RST should be set to 200 µs according to the JEDEC
specification for DDR3. With a cycle of 15.258 µs, this gives 14 cycles encoded
as 0x10 for the bit-field MMDC1_MDOR[13:8].
Signed-off-by: Benoît Thébaudeau <benoit.thebaudeau@advansee.com>
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MMDC1_MDOR.tXPR should be set as specified for the JEDEC DDR3 timing tXPR.
For all DDR3 speed bins:
tXPR(min) = max(5 nCK, tRFC(min) + 10 ns)
tRFC(2 Gb) = 160 ns
All the users of mx6q_4x_mt41j128.cfg have a 2-Gb density (Micron
MT41J128M16HA-15E or SK hynix H5TQ2G63BFR-H9C for i.MX6Q SABRE Lite, and Micron
MT41K128M16JT-125:K for i.MX6 SABRE SD).
Hence, MMDC1_MDOR.tXPR should be set to max(5 nCK, 170 ns), which is 170 ns
and 91 nCK at 532 MHz, encoded as 0x5A in the bit-field MMDC1_MDOR[23:16].
Signed-off-by: Benoît Thébaudeau <benoit.thebaudeau@advansee.com>
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MMDC1_MDCFG1.tMRD should be set to max(tMRD, tMOD) for DDR3.
For all DDR3 speed bins:
tMRD(min) = 4 nCK
tMOD(min) = max(12 nCK, 15 ns)
Hence, MMDC1_MDCFG1.tMRD should be set to max(12 nCK, 15 ns), which is 12 nCK
at 532 MHz, encoded as 0xB in the bit-field MMDC1_MDCFG1[8:5].
Signed-off-by: Benoît Thébaudeau <benoit.thebaudeau@advansee.com>
Tested-by: Eric Nelson <eric.nelson@boundarydevices.com>
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The '#' used as comments in the files cause the preprocessor
trouble, so change to /* */.
The mkimage command which uses this preprocessor output
was moved to arch/arm/imx-common/Makefile
.gitignore was updated to ignore .cfgtmp files.
Signed-off-by: Troy Kisky <troy.kisky@boundarydevices.com>
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Factor out common DDR3 initialization code, allowing easier maintainance of such
scripts.
Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
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