diff options
| author | Marek Vasut <marex@denx.de> | 2014-08-04 01:47:10 +0200 |
|---|---|---|
| committer | Stefano Babic <sbabic@denx.de> | 2014-08-20 12:22:52 +0200 |
| commit | b299ab7435b016d688c0665b3776ee897e4b6e17 (patch) | |
| tree | 225e5cc44286989efe9b7fcb42548f8e5c8ba45f /arch/arm | |
| parent | fcfdfdd58c67dbade1bafb48e393be2f432be33a (diff) | |
ARM: mx6: Handle the MMDCx_MDCTL COL field caprices
The COL field value cannot be easily calculated from the desired
column number. Instead, there are special cases for that, see the
datasheet, MMDCx_MDCTL field description, field COL . Cater for
those special cases.
Signed-off-by: Marek Vasut <marex@denx.de>
Diffstat (limited to 'arch/arm')
| -rw-r--r-- | arch/arm/cpu/armv7/mx6/ddr.c | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/arch/arm/cpu/armv7/mx6/ddr.c b/arch/arm/cpu/armv7/mx6/ddr.c index 0434211110..1ab69f63c8 100644 --- a/arch/arm/cpu/armv7/mx6/ddr.c +++ b/arch/arm/cpu/armv7/mx6/ddr.c @@ -197,6 +197,7 @@ void mx6_dram_cfg(const struct mx6_ddr_sysinfo *i, u16 trcd, trc, tras, twr, tmrd, trtp, trp, twtr, trfc, txs, txpr; u16 CS0_END; u16 tdllk = 0x1ff; /* DLL locking time: 512 cycles (JEDEC DDR3) */ + u8 coladdr; int clkper; /* clock period in picoseconds */ int clock; /* clock freq in mHz */ int cs; @@ -422,8 +423,13 @@ void mx6_dram_cfg(const struct mx6_ddr_sysinfo *i, mmdc0->mdor = reg; /* Step 5: Configure DDR physical parameters (density and burst len) */ + coladdr = m->coladdr; + if (m->coladdr == 8) /* 8-bit COL is 0x3 */ + coladdr += 4; + else if (m->coladdr == 12) /* 12-bit COL is 0x4 */ + coladdr += 1; reg = (m->rowaddr - 11) << 24 | /* ROW */ - (m->coladdr - 9) << 20 | /* COL */ + (coladdr - 9) << 20 | /* COL */ (1 << 19) | /* Burst Length = 8 for DDR3 */ (i->dsize << 16); /* DDR data bus size */ mmdc0->mdctl = reg; |