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| author | York Sun <yorksun@freescale.com> | 2015-11-04 10:03:19 -0800 |
|---|---|---|
| committer | York Sun <yorksun@freescale.com> | 2015-12-13 18:27:27 -0800 |
| commit | 8a51429e0094746c035ba96af5999432b3b3480b (patch) | |
| tree | b0c23151fa1365fc16090e9e2991da4636316f87 /drivers | |
| parent | 0fb7197436378eeb92ff8e2c6a6f6490b31eef1c (diff) | |
| download | u-boot-imx-8a51429e0094746c035ba96af5999432b3b3480b.zip u-boot-imx-8a51429e0094746c035ba96af5999432b3b3480b.tar.gz u-boot-imx-8a51429e0094746c035ba96af5999432b3b3480b.tar.bz2 | |
driver/ddr/fsl: Update MR5 RTT park
For four chip-selects enabled case, RTT is parked on all of them.
Signed-off-by: York Sun <yorksun@freescale.com>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/ddr/fsl/ctrl_regs.c | 19 |
1 files changed, 15 insertions, 4 deletions
diff --git a/drivers/ddr/fsl/ctrl_regs.c b/drivers/ddr/fsl/ctrl_regs.c index 36bf647..99714bf 100644 --- a/drivers/ddr/fsl/ctrl_regs.c +++ b/drivers/ddr/fsl/ctrl_regs.c @@ -1117,10 +1117,18 @@ static void set_ddr_sdram_mode_9(fsl_ddr_cfg_regs_t *ddr, unsigned short esdmode4 = 0; /* Extended SDRAM mode 4 */ unsigned short esdmode5; /* Extended SDRAM mode 5 */ int rtt_park = 0; - + bool four_cs = false; + +#if CONFIG_CHIP_SELECTS_PER_CTRL == 4 + if ((ddr->cs[0].config & SDRAM_CS_CONFIG_EN) && + (ddr->cs[1].config & SDRAM_CS_CONFIG_EN) && + (ddr->cs[2].config & SDRAM_CS_CONFIG_EN) && + (ddr->cs[3].config & SDRAM_CS_CONFIG_EN)) + four_cs = true; +#endif if (ddr->cs[0].config & SDRAM_CS_CONFIG_EN) { esdmode5 = 0x00000500; /* Data mask enable, RTT_PARK CS0 */ - rtt_park = 1; + rtt_park = four_cs ? 0 : 1; } else { esdmode5 = 0x00000400; /* Data mask enabled */ } @@ -1130,7 +1138,10 @@ static void set_ddr_sdram_mode_9(fsl_ddr_cfg_regs_t *ddr, | ((esdmode5 & 0xffff) << 0) ); - /* only mode_9 use 0x500, others use 0x400 */ + /* Normally only the first enabled CS use 0x500, others use 0x400 + * But when four chip-selects are all enabled, all mode registers + * need 0x500 to park. + */ debug("FSLDDR: ddr_sdram_mode_9) = 0x%08x\n", ddr->ddr_sdram_mode_9); if (unq_mrs_en) { /* unique mode registers are supported */ @@ -1138,7 +1149,7 @@ static void set_ddr_sdram_mode_9(fsl_ddr_cfg_regs_t *ddr, if (!rtt_park && (ddr->cs[i].config & SDRAM_CS_CONFIG_EN)) { esdmode5 |= 0x00000500; /* RTT_PARK */ - rtt_park = 1; + rtt_park = four_cs ? 0 : 1; } else { esdmode5 = 0x00000400; } |