diff options
Diffstat (limited to 'arch/arm/cpu/armv7/omap-common/emif-common.c')
-rw-r--r-- | arch/arm/cpu/armv7/omap-common/emif-common.c | 146 |
1 files changed, 125 insertions, 21 deletions
diff --git a/arch/arm/cpu/armv7/omap-common/emif-common.c b/arch/arm/cpu/armv7/omap-common/emif-common.c index c01a98f..3ee4695 100644 --- a/arch/arm/cpu/armv7/omap-common/emif-common.c +++ b/arch/arm/cpu/armv7/omap-common/emif-common.c @@ -242,13 +242,122 @@ static void omap5_ddr3_leveling(u32 base, const struct emif_regs *regs) __udelay(130); } -static void ddr3_leveling(u32 base, const struct emif_regs *regs) +static void update_hwleveling_output(u32 base, const struct emif_regs *regs) { - if (is_omap54xx()) - omap5_ddr3_leveling(base, regs); + struct emif_reg_struct *emif = (struct emif_reg_struct *)base; + u32 *emif_ext_phy_ctrl_reg, *emif_phy_status; + u32 reg, i; + + emif_phy_status = (u32 *)&emif->emif_ddr_phy_status[7]; + + /* Update PHY_REG_RDDQS_RATIO */ + emif_ext_phy_ctrl_reg = (u32 *)&emif->emif_ddr_ext_phy_ctrl_7; + for (i = 0; i < PHY_RDDQS_RATIO_REGS; i++) { + reg = readl(emif_phy_status++); + writel(reg, emif_ext_phy_ctrl_reg++); + writel(reg, emif_ext_phy_ctrl_reg++); + } + + /* Update PHY_REG_FIFO_WE_SLAVE_RATIO */ + emif_ext_phy_ctrl_reg = (u32 *)&emif->emif_ddr_ext_phy_ctrl_2; + for (i = 0; i < PHY_FIFO_WE_SLAVE_RATIO_REGS; i++) { + reg = readl(emif_phy_status++); + writel(reg, emif_ext_phy_ctrl_reg++); + writel(reg, emif_ext_phy_ctrl_reg++); + } + + /* Update PHY_REG_WR_DQ/DQS_SLAVE_RATIO */ + emif_ext_phy_ctrl_reg = (u32 *)&emif->emif_ddr_ext_phy_ctrl_12; + for (i = 0; i < PHY_REG_WR_DQ_SLAVE_RATIO_REGS; i++) { + reg = readl(emif_phy_status++); + writel(reg, emif_ext_phy_ctrl_reg++); + writel(reg, emif_ext_phy_ctrl_reg++); + } + + /* Disable Leveling */ + writel(regs->emif_ddr_phy_ctlr_1, &emif->emif_ddr_phy_ctrl_1); + writel(regs->emif_ddr_phy_ctlr_1, &emif->emif_ddr_phy_ctrl_1_shdw); + writel(0x0, &emif->emif_rd_wr_lvl_rmp_ctl); } -static void ddr3_init(u32 base, const struct emif_regs *regs) +static void dra7_ddr3_leveling(u32 base, const struct emif_regs *regs) +{ + struct emif_reg_struct *emif = (struct emif_reg_struct *)base; + + /* Clear Error Status */ + clrsetbits_le32(&emif->emif_ddr_ext_phy_ctrl_36, + EMIF_REG_PHY_FIFO_WE_IN_MISALINED_CLR, + EMIF_REG_PHY_FIFO_WE_IN_MISALINED_CLR); + + clrsetbits_le32(&emif->emif_ddr_ext_phy_ctrl_36_shdw, + EMIF_REG_PHY_FIFO_WE_IN_MISALINED_CLR, + EMIF_REG_PHY_FIFO_WE_IN_MISALINED_CLR); + + /* Disable refreshed before leveling */ + clrsetbits_le32(&emif->emif_sdram_ref_ctrl, EMIF_REG_INITREF_DIS_SHIFT, + EMIF_REG_INITREF_DIS_SHIFT); + + /* Start Full leveling */ + writel(DDR3_FULL_LVL, &emif->emif_rd_wr_lvl_ctl); + + __udelay(300); + + /* Check for leveling timeout */ + if (readl(&emif->emif_status) & EMIF_REG_LEVELING_TO_MASK) { + printf("Leveling timeout on EMIF%d\n", emif_num(base)); + return; + } + + /* Enable refreshes after leveling */ + clrbits_le32(&emif->emif_sdram_ref_ctrl, EMIF_REG_INITREF_DIS_SHIFT); + + debug("HW leveling success\n"); + /* + * Update slave ratios in EXT_PHY_CTRLx registers + * as per HW leveling output + */ + update_hwleveling_output(base, regs); +} + +static void dra7_ddr3_init(u32 base, const struct emif_regs *regs) +{ + struct emif_reg_struct *emif = (struct emif_reg_struct *)base; + + if (warm_reset()) + emif_reset_phy(base); + do_ext_phy_settings(base, regs); + + writel(regs->ref_ctrl | EMIF_REG_INITREF_DIS_MASK, + &emif->emif_sdram_ref_ctrl); + /* Update timing registers */ + writel(regs->sdram_tim1, &emif->emif_sdram_tim_1); + writel(regs->sdram_tim2, &emif->emif_sdram_tim_2); + writel(regs->sdram_tim3, &emif->emif_sdram_tim_3); + + writel(EMIF_L3_CONFIG_VAL_SYS_10_MPU_5_LL_0, &emif->emif_l3_config); + writel(regs->read_idle_ctrl, &emif->emif_read_idlectrl); + writel(regs->zq_config, &emif->emif_zq_config); + writel(regs->temp_alert_config, &emif->emif_temp_alert_config); + writel(regs->emif_rd_wr_lvl_rmp_ctl, &emif->emif_rd_wr_lvl_rmp_ctl); + writel(regs->emif_rd_wr_lvl_ctl, &emif->emif_rd_wr_lvl_ctl); + + writel(regs->emif_ddr_phy_ctlr_1_init, &emif->emif_ddr_phy_ctrl_1); + writel(regs->emif_rd_wr_exec_thresh, &emif->emif_rd_wr_exec_thresh); + + writel(regs->ref_ctrl, &emif->emif_sdram_ref_ctrl); + + writel(regs->sdram_config2, &emif->emif_lpddr2_nvm_config); + writel(regs->sdram_config_init, &emif->emif_sdram_config); + + __udelay(1000); + + writel(regs->ref_ctrl_final, &emif->emif_sdram_ref_ctrl); + + if (regs->emif_rd_wr_lvl_rmp_ctl & EMIF_REG_RDWRLVL_EN_MASK) + dra7_ddr3_leveling(base, regs); +} + +static void omap5_ddr3_init(u32 base, const struct emif_regs *regs) { struct emif_reg_struct *emif = (struct emif_reg_struct *)base; @@ -269,25 +378,20 @@ static void ddr3_init(u32 base, const struct emif_regs *regs) writel(regs->read_idle_ctrl, &emif->emif_read_idlectrl); - /* - * The same sequence should work on OMAP5432 as well. But strange that - * it is not working - */ - if (is_dra7xx()) { - do_ext_phy_settings(base, regs); - writel(regs->ref_ctrl_final, &emif->emif_sdram_ref_ctrl); - writel(regs->sdram_config2, &emif->emif_lpddr2_nvm_config); - writel(regs->sdram_config_init, &emif->emif_sdram_config); - } else { - writel(regs->sdram_config2, &emif->emif_lpddr2_nvm_config); - writel(regs->sdram_config_init, &emif->emif_sdram_config); - do_ext_phy_settings(base, regs); - } + writel(regs->sdram_config2, &emif->emif_lpddr2_nvm_config); + writel(regs->sdram_config_init, &emif->emif_sdram_config); + do_ext_phy_settings(base, regs); - /* enable leveling */ writel(regs->emif_rd_wr_lvl_rmp_ctl, &emif->emif_rd_wr_lvl_rmp_ctl); + omap5_ddr3_leveling(base, regs); +} - ddr3_leveling(base, regs); +static void ddr3_init(u32 base, const struct emif_regs *regs) +{ + if (is_omap54xx()) + omap5_ddr3_init(base, regs); + else + dra7_ddr3_init(base, regs); } #ifndef CONFIG_SYS_EMIF_PRECALCULATED_TIMING_REGS @@ -1075,7 +1179,7 @@ static void do_sdram_init(u32 base) if (warm_reset() && (emif_sdram_type() == EMIF_SDRAM_TYPE_DDR3)) { set_lpmode_selfrefresh(base); emif_reset_phy(base); - ddr3_leveling(base, regs); + omap5_ddr3_leveling(base, regs); } /* Write to the shadow registers */ |