// SPDX-License-Identifier: GPL-2.0+ /* * DDR controller configuration for the i.MX7 architecture * * (C) Copyright 2017 CompuLab, Ltd. http://www.compulab.com * * Author: Uri Mashiach */ #include #include #include #include #include #include #include /* * Routine: mx7_dram_cfg * Description: DDR controller configuration * * @ddrc_regs_val: DDRC registers value * @ddrc_mp_val: DDRC_MP registers value * @ddr_phy_regs_val: DDR_PHY registers value * @calib_param: calibration parameters * */ void mx7_dram_cfg(struct ddrc *ddrc_regs_val, struct ddrc_mp *ddrc_mp_val, struct ddr_phy *ddr_phy_regs_val, struct mx7_calibration *calib_param) { struct src *const src_regs = (struct src *)SRC_BASE_ADDR; struct ddrc *const ddrc_regs = (struct ddrc *)DDRC_IPS_BASE_ADDR; struct ddrc_mp *const ddrc_mp_reg = (struct ddrc_mp *)DDRC_MP_BASE_ADDR; struct ddr_phy *const ddr_phy_regs = (struct ddr_phy *)DDRPHY_IPS_BASE_ADDR; struct iomuxc_gpr_base_regs *const iomuxc_gpr_regs = (struct iomuxc_gpr_base_regs *)IOMUXC_GPR_BASE_ADDR; int i; /* * iMX7D RM 9.2.4.9.3 Power removal flow Table 9-11. Re-enabling power * row 2 says "Reset controller / PHY by driving core_ddrc_rst = 0 , * aresetn_n = 0, presetn = 0. That means reset everything. */ writel(SRC_DDRC_RCR_DDRC_CORE_RST_MASK | SRC_DDRC_RCR_DDRC_PRST_MASK, &src_regs->ddrc_rcr); /* * iMX7D RM 6.2.7.26 SRC_DDRC_RCR says wait 30 cycles (of unknown). * If we assume this is 30 cycles at 100 MHz (about the rate of a * DRAM bus), that's 300 nS, so waiting 10 uS is more then plenty. */ udelay(10); /* De-assert DDR Controller 'preset' and DDR PHY reset */ clrbits_le32(&src_regs->ddrc_rcr, SRC_DDRC_RCR_DDRC_PRST_MASK); /* DDR controller configuration */ writel(ddrc_regs_val->mstr, &ddrc_regs->mstr); writel(ddrc_regs_val->rfshtmg, &ddrc_regs->rfshtmg); writel(ddrc_mp_val->pctrl_0, &ddrc_mp_reg->pctrl_0); writel(ddrc_regs_val->init1, &ddrc_regs->init1); writel(ddrc_regs_val->init0, &ddrc_regs->init0); writel(ddrc_regs_val->init3, &ddrc_regs->init3); writel(ddrc_regs_val->init4, &ddrc_regs->init4); writel(ddrc_regs_val->init5, &ddrc_regs->init5); writel(ddrc_regs_val->rankctl, &ddrc_regs->rankctl); writel(ddrc_regs_val->dramtmg0, &ddrc_regs->dramtmg0); writel(ddrc_regs_val->dramtmg1, &ddrc_regs->dramtmg1); writel(ddrc_regs_val->dramtmg2, &ddrc_regs->dramtmg2); writel(ddrc_regs_val->dramtmg3, &ddrc_regs->dramtmg3); writel(ddrc_regs_val->dramtmg4, &ddrc_regs->dramtmg4); writel(ddrc_regs_val->dramtmg5, &ddrc_regs->dramtmg5); writel(ddrc_regs_val->dramtmg8, &ddrc_regs->dramtmg8); writel(ddrc_regs_val->zqctl0, &ddrc_regs->zqctl0); writel(ddrc_regs_val->dfitmg0, &ddrc_regs->dfitmg0); writel(ddrc_regs_val->dfitmg1, &ddrc_regs->dfitmg1); writel(ddrc_regs_val->dfiupd0, &ddrc_regs->dfiupd0); writel(ddrc_regs_val->dfiupd1, &ddrc_regs->dfiupd1); writel(ddrc_regs_val->dfiupd2, &ddrc_regs->dfiupd2); writel(ddrc_regs_val->addrmap0, &ddrc_regs->addrmap0); writel(ddrc_regs_val->addrmap1, &ddrc_regs->addrmap1); writel(ddrc_regs_val->addrmap4, &ddrc_regs->addrmap4); writel(ddrc_regs_val->addrmap5, &ddrc_regs->addrmap5); writel(ddrc_regs_val->addrmap6, &ddrc_regs->addrmap6); writel(ddrc_regs_val->odtcfg, &ddrc_regs->odtcfg); writel(ddrc_regs_val->odtmap, &ddrc_regs->odtmap); /* De-assert DDR Controller 'core_ddrc_rstn' and 'aresetn' */ clrbits_le32(&src_regs->ddrc_rcr, SRC_DDRC_RCR_DDRC_CORE_RST_MASK); /* PHY configuration */ writel(ddr_phy_regs_val->phy_con0, &ddr_phy_regs->phy_con0); writel(ddr_phy_regs_val->phy_con1, &ddr_phy_regs->phy_con1); writel(ddr_phy_regs_val->phy_con4, &ddr_phy_regs->phy_con4); writel(ddr_phy_regs_val->mdll_con0, &ddr_phy_regs->mdll_con0); writel(ddr_phy_regs_val->drvds_con0, &ddr_phy_regs->drvds_con0); writel(ddr_phy_regs_val->offset_wr_con0, &ddr_phy_regs->offset_wr_con0); writel(ddr_phy_regs_val->offset_rd_con0, &ddr_phy_regs->offset_rd_con0); writel(ddr_phy_regs_val->cmd_sdll_con0 | DDR_PHY_CMD_SDLL_CON0_CTRL_RESYNC_MASK, &ddr_phy_regs->cmd_sdll_con0); writel(ddr_phy_regs_val->cmd_sdll_con0 & ~DDR_PHY_CMD_SDLL_CON0_CTRL_RESYNC_MASK, &ddr_phy_regs->cmd_sdll_con0); writel(ddr_phy_regs_val->offset_lp_con0, &ddr_phy_regs->offset_lp_con0); /* calibration */ for (i = 0; i < calib_param->num_val; i++) writel(calib_param->values[i], &ddr_phy_regs->zq_con0); /* Wake_up DDR PHY */ HW_CCM_CCGR_WR(CCGR_IDX_DDR, CCM_CLK_ON_N_N); writel(IOMUXC_GPR_GPR8_ddr_phy_ctrl_wake_up(0xf) | IOMUXC_GPR_GPR8_ddr_phy_dfi_init_start_MASK, &iomuxc_gpr_regs->gpr[8]); HW_CCM_CCGR_WR(CCGR_IDX_DDR, CCM_CLK_ON_R_W); } /* * Routine: imx_ddr_size * Description: extract the current DRAM size from the DDRC registers * * @return: DRAM size */ unsigned int imx_ddr_size(void) { struct ddrc *const ddrc_regs = (struct ddrc *)DDRC_IPS_BASE_ADDR; u32 reg_val, field_val; int bits = 0;/* Number of address bits */ /* Count data bus width bits */ reg_val = readl(&ddrc_regs->mstr); field_val = (reg_val & MSTR_DATA_BUS_WIDTH_MASK) >> MSTR_DATA_BUS_WIDTH_SHIFT; bits += 2 - field_val; /* Count rank address bits */ field_val = (reg_val & MSTR_DATA_ACTIVE_RANKS_MASK) >> MSTR_DATA_ACTIVE_RANKS_SHIFT; if (field_val > 1) bits += field_val - 1; /* Count column address bits */ bits += 2;/* Column address 0 and 1 are fixed mapped */ reg_val = readl(&ddrc_regs->addrmap2); field_val = (reg_val & ADDRMAP2_COL_B2_MASK) >> ADDRMAP2_COL_B2_SHIFT; if (field_val <= 7) bits++; field_val = (reg_val & ADDRMAP2_COL_B3_MASK) >> ADDRMAP2_COL_B3_SHIFT; if (field_val <= 7) bits++; field_val = (reg_val & ADDRMAP2_COL_B4_MASK) >> ADDRMAP2_COL_B4_SHIFT; if (field_val <= 7) bits++; field_val = (reg_val & ADDRMAP2_COL_B5_MASK) >> ADDRMAP2_COL_B5_SHIFT; if (field_val <= 7) bits++; reg_val = readl(&ddrc_regs->addrmap3); field_val = (reg_val & ADDRMAP3_COL_B6_MASK) >> ADDRMAP3_COL_B6_SHIFT; if (field_val <= 7) bits++; field_val = (reg_val & ADDRMAP3_COL_B7_MASK) >> ADDRMAP3_COL_B7_SHIFT; if (field_val <= 7) bits++; field_val = (reg_val & ADDRMAP3_COL_B8_MASK) >> ADDRMAP3_COL_B8_SHIFT; if (field_val <= 7) bits++; field_val = (reg_val & ADDRMAP3_COL_B9_MASK) >> ADDRMAP3_COL_B9_SHIFT; if (field_val <= 7) bits++; reg_val = readl(&ddrc_regs->addrmap4); field_val = (reg_val & ADDRMAP4_COL_B10_MASK) >> ADDRMAP4_COL_B10_SHIFT; if (field_val <= 7) bits++; field_val = (reg_val & ADDRMAP4_COL_B11_MASK) >> ADDRMAP4_COL_B11_SHIFT; if (field_val <= 7) bits++; /* Count row address bits */ reg_val = readl(&ddrc_regs->addrmap5); field_val = (reg_val & ADDRMAP5_ROW_B0_MASK) >> ADDRMAP5_ROW_B0_SHIFT; if (field_val <= 11) bits++; field_val = (reg_val & ADDRMAP5_ROW_B1_MASK) >> ADDRMAP5_ROW_B1_SHIFT; if (field_val <= 11) bits++; field_val = (reg_val & ADDRMAP5_ROW_B2_10_MASK) >> ADDRMAP5_ROW_B2_10_SHIFT; if (field_val <= 11) bits += 9; field_val = (reg_val & ADDRMAP5_ROW_B11_MASK) >> ADDRMAP5_ROW_B11_SHIFT; if (field_val <= 11) bits++; reg_val = readl(&ddrc_regs->addrmap6); field_val = (reg_val & ADDRMAP6_ROW_B12_MASK) >> ADDRMAP6_ROW_B12_SHIFT; if (field_val <= 11) bits++; field_val = (reg_val & ADDRMAP6_ROW_B13_MASK) >> ADDRMAP6_ROW_B13_SHIFT; if (field_val <= 11) bits++; field_val = (reg_val & ADDRMAP6_ROW_B14_MASK) >> ADDRMAP6_ROW_B14_SHIFT; if (field_val <= 11) bits++; field_val = (reg_val & ADDRMAP6_ROW_B15_MASK) >> ADDRMAP6_ROW_B15_SHIFT; if (field_val <= 11) bits++; /* Count bank bits */ reg_val = readl(&ddrc_regs->addrmap1); field_val = (reg_val & ADDRMAP1_BANK_B0_MASK) >> ADDRMAP1_BANK_B0_SHIFT; if (field_val <= 30) bits++; field_val = (reg_val & ADDRMAP1_BANK_B1_MASK) >> ADDRMAP1_BANK_B1_SHIFT; if (field_val <= 30) bits++; field_val = (reg_val & ADDRMAP1_BANK_B2_MASK) >> ADDRMAP1_BANK_B2_SHIFT; if (field_val <= 29) bits++; /* cap to max 2 GB */ if (bits > 31) bits = 31; return 1 << bits; }