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-rw-r--r--roms/u-boot/arch/arm/mach-imx/mx7/ddr.c230
1 files changed, 230 insertions, 0 deletions
diff --git a/roms/u-boot/arch/arm/mach-imx/mx7/ddr.c b/roms/u-boot/arch/arm/mach-imx/mx7/ddr.c
new file mode 100644
index 000000000..cf2556976
--- /dev/null
+++ b/roms/u-boot/arch/arm/mach-imx/mx7/ddr.c
@@ -0,0 +1,230 @@
+// 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 <uri.mashiach@compulab.co.il>
+ */
+
+#include <linux/types.h>
+#include <asm/io.h>
+#include <asm/arch/imx-regs.h>
+#include <asm/arch/crm_regs.h>
+#include <asm/arch/mx7-ddr.h>
+#include <common.h>
+#include <linux/delay.h>
+
+/*
+ * 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->zqctl1, &ddrc_regs->zqctl1);
+ 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);
+ writel(ddr_phy_regs_val->cmd_deskew_con0,
+ &ddr_phy_regs->cmd_deskew_con0);
+ writel(ddr_phy_regs_val->cmd_deskew_con1,
+ &ddr_phy_regs->cmd_deskew_con1);
+ writel(ddr_phy_regs_val->cmd_deskew_con2,
+ &ddr_phy_regs->cmd_deskew_con2);
+ writel(ddr_phy_regs_val->cmd_deskew_con3,
+ &ddr_phy_regs->cmd_deskew_con3);
+ writel(ddr_phy_regs_val->cmd_lvl_con0, &ddr_phy_regs->cmd_lvl_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;
+}