diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/soc/imgtec/pistachio/ddr2_init.c | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/src/soc/imgtec/pistachio/ddr2_init.c b/src/soc/imgtec/pistachio/ddr2_init.c index 9c94d8b2f9..dd09321fb0 100644 --- a/src/soc/imgtec/pistachio/ddr2_init.c +++ b/src/soc/imgtec/pistachio/ddr2_init.c @@ -97,6 +97,7 @@ #define DDR_PCTL_CCFG1_OFFSET (0x048C) #define DDR_PHY 0xB8180800 +#define DDRPHY_PGCR_OFFSET (0x0008) #define DDRPHY_DCR_OFFSET (0x0030) #define DDRPHY_MR_OFFSET (0x0040) #define DDRPHY_EMR_OFFSET (0x0044) @@ -318,6 +319,28 @@ int init_ddr2(void) * 29:19 : tDINIT1 DRAM Init time 400ns 160 Dec 0xA0 */ write32(DDR_PHY + DDRPHY_PTR1_OFFSET, 0x05013880); + /* DQS gating configuration: passive windowing mode */ + /* + * PGCR: PHY General cofiguration register + * 0 ITM DDR mode: 0 + * 1 DQS gading configuration: passive windowing 1 + * 2 DQS drift compensation: not supported in passive windowing 0 + * 4:3 DQS drift limit 0 + * 8:5 Digital test output select 0 + * 11:9 CK Enable: one bit for each 3 CK pair: 0x7 + * 13:12 CK Disable values: 0x2 + * 14 CK Invert 0 + * 15 IO loopback 0 + * 17:16 I/O DDR mode 0 + * 21:18 Ranks enable by training: 0xF + * 23:22 Impedance clock divider select 0x2 + * 24 Power down disable 1 + * 28:25 Refresh during training 0 + * 29 loopback DQS shift 0 + * 30 loopback DQS gating 0 + * 31 loopback mode 0 + */ + write32(DDR_PHY + DDRPHY_PGCR_OFFSET, 0x01BC2E02); /* PGSR : Wait for INIT/DLL/Z Done from Power on Reset */ if (wait_for_completion(DDR_PHY + DDRPHY_PGSR_OFFSET, 0x00000007)) return DDR_TIMEOUT; |