diff options
author | SRICHARAN R <r.sricharan@ti.com> | 2012-03-12 02:25:37 +0000 |
---|---|---|
committer | Albert ARIBAUD <albert.u.boot@aribaud.net> | 2012-05-15 08:31:23 +0200 |
commit | f40107345cbcd6e0d1747eda45e76c4e2a6df0db (patch) | |
tree | 19926012178f2c73c3fc5c60d391d8d40f1cfaff /arch/arm/cpu/armv7/omap-common/emif-common.c | |
parent | 6ad8d67de8f9ec9d4a8a90b0b3f78f13bec43c89 (diff) |
OMAP5: emif/ddr: Change emif settings as required for ES1.0 silicon.
The OMAP5 silicon has new DDR PHY design, which includes a external PHY
as well. So configuring the ext PHY parameters here. Also the EMIF timimg
registers and a couple of DDR mode registers needs to be updated based on
the testing from the actual silicon.
Signed-off-by: R Sricharan <r.sricharan@ti.com>
Diffstat (limited to 'arch/arm/cpu/armv7/omap-common/emif-common.c')
-rw-r--r-- | arch/arm/cpu/armv7/omap-common/emif-common.c | 41 |
1 files changed, 39 insertions, 2 deletions
diff --git a/arch/arm/cpu/armv7/omap-common/emif-common.c b/arch/arm/cpu/armv7/omap-common/emif-common.c index 62678ff5d30..db509c92951 100644 --- a/arch/arm/cpu/armv7/omap-common/emif-common.c +++ b/arch/arm/cpu/armv7/omap-common/emif-common.c @@ -90,20 +90,33 @@ static void do_lpddr2_init(u32 base, u32 cs) * tZQINIT = 1 us * Enough loops assuming a maximum of 2GHz */ + sdelay(2000); - set_mr(base, cs, LPDDR2_MR1, MR1_BL_8_BT_SEQ_WRAP_EN_NWR_3); + + if (omap_revision() >= OMAP5430_ES1_0) + set_mr(base, cs, LPDDR2_MR1, MR1_BL_8_BT_SEQ_WRAP_EN_NWR_8); + else + set_mr(base, cs, LPDDR2_MR1, MR1_BL_8_BT_SEQ_WRAP_EN_NWR_3); + set_mr(base, cs, LPDDR2_MR16, MR16_REF_FULL_ARRAY); + /* * Enable refresh along with writing MR2 * Encoding of RL in MR2 is (RL - 2) */ mr_addr = LPDDR2_MR2 | EMIF_REG_REFRESH_EN_MASK; set_mr(base, cs, mr_addr, RL_FINAL - 2); + + if (omap_revision() >= OMAP5430_ES1_0) + set_mr(base, cs, LPDDR2_MR3, 0x1); } static void lpddr2_init(u32 base, const struct emif_regs *regs) { struct emif_reg_struct *emif = (struct emif_reg_struct *)base; + u32 *ext_phy_ctrl_base = 0; + u32 *emif_ext_phy_ctrl_base = 0; + u32 i = 0; /* Not NVM */ clrbits_le32(&emif->emif_lpddr2_nvm_config, EMIF_REG_CS1NVMEN_MASK); @@ -119,7 +132,31 @@ static void lpddr2_init(u32 base, const struct emif_regs *regs) * un-locked frequency & default RL */ writel(regs->sdram_config_init, &emif->emif_sdram_config); - writel(regs->emif_ddr_phy_ctlr_1_init, &emif->emif_ddr_phy_ctrl_1); + writel(regs->emif_ddr_phy_ctlr_1, &emif->emif_ddr_phy_ctrl_1); + + ext_phy_ctrl_base = (u32 *) &(regs->emif_ddr_ext_phy_ctrl_1); + emif_ext_phy_ctrl_base = (u32 *) &(emif->emif_ddr_ext_phy_ctrl_1); + + if (omap_revision() >= OMAP5430_ES1_0) { + /* Configure external phy control timing registers */ + for (i = 0; i < EMIF_EXT_PHY_CTRL_TIMING_REG; i++) { + writel(*ext_phy_ctrl_base, emif_ext_phy_ctrl_base++); + /* Update shadow registers */ + writel(*ext_phy_ctrl_base++, emif_ext_phy_ctrl_base++); + } + + /* + * external phy 6-24 registers do not change with + * ddr frequency + */ + for (i = 0; i < EMIF_EXT_PHY_CTRL_CONST_REG; i++) { + writel(ext_phy_ctrl_const_base[i], + emif_ext_phy_ctrl_base++); + /* Update shadow registers */ + writel(ext_phy_ctrl_const_base[i], + emif_ext_phy_ctrl_base++); + } + } do_lpddr2_init(base, CS0); if (regs->sdram_config & EMIF_REG_EBANK_MASK) |