#include <common.h>
#include <linux/types.h>
+#include <asm/arch/clock.h>
#include <asm/arch/mx6-ddr.h>
#include <asm/arch/sys_proto.h>
#include <asm/io.h>
#include <asm/types.h>
+#include <wait_bit.h>
+
+#if defined(CONFIG_MX6_DDRCAL)
+static void reset_read_data_fifos(void)
+{
+ struct mmdc_p_regs *mmdc0 = (struct mmdc_p_regs *)MMDC_P0_BASE_ADDR;
+
+ /* Reset data FIFOs twice. */
+ setbits_le32(&mmdc0->mpdgctrl0, 1 << 31);
+ wait_for_bit("MMDC", &mmdc0->mpdgctrl0, 1 << 31, 0, 100, 0);
+
+ setbits_le32(&mmdc0->mpdgctrl0, 1 << 31);
+ wait_for_bit("MMDC", &mmdc0->mpdgctrl0, 1 << 31, 0, 100, 0);
+}
+
+static void precharge_all(const bool cs0_enable, const bool cs1_enable)
+{
+ struct mmdc_p_regs *mmdc0 = (struct mmdc_p_regs *)MMDC_P0_BASE_ADDR;
+
+ /*
+ * Issue the Precharge-All command to the DDR device for both
+ * chip selects. Note, CON_REQ bit should also remain set. If
+ * only using one chip select, then precharge only the desired
+ * chip select.
+ */
+ if (cs0_enable) { /* CS0 */
+ writel(0x04008050, &mmdc0->mdscr);
+ wait_for_bit("MMDC", &mmdc0->mdscr, 1 << 14, 1, 100, 0);
+ }
+
+ if (cs1_enable) { /* CS1 */
+ writel(0x04008058, &mmdc0->mdscr);
+ wait_for_bit("MMDC", &mmdc0->mdscr, 1 << 14, 1, 100, 0);
+ }
+}
+
+static void force_delay_measurement(int bus_size)
+{
+ struct mmdc_p_regs *mmdc0 = (struct mmdc_p_regs *)MMDC_P0_BASE_ADDR;
+ struct mmdc_p_regs *mmdc1 = (struct mmdc_p_regs *)MMDC_P1_BASE_ADDR;
+
+ writel(0x800, &mmdc0->mpmur0);
+ if (bus_size == 0x2)
+ writel(0x800, &mmdc1->mpmur0);
+}
+
+static void modify_dg_result(u32 *reg_st0, u32 *reg_st1, u32 *reg_ctrl)
+{
+ u32 dg_tmp_val, dg_dl_abs_offset, dg_hc_del, val_ctrl;
+
+ /*
+ * DQS gating absolute offset should be modified from reflecting
+ * (HW_DG_LOWx + HW_DG_UPx)/2 to reflecting (HW_DG_UPx - 0x80)
+ */
+
+ val_ctrl = readl(reg_ctrl);
+ val_ctrl &= 0xf0000000;
+
+ dg_tmp_val = ((readl(reg_st0) & 0x07ff0000) >> 16) - 0xc0;
+ dg_dl_abs_offset = dg_tmp_val & 0x7f;
+ dg_hc_del = (dg_tmp_val & 0x780) << 1;
+
+ val_ctrl |= dg_dl_abs_offset + dg_hc_del;
+
+ dg_tmp_val = ((readl(reg_st1) & 0x07ff0000) >> 16) - 0xc0;
+ dg_dl_abs_offset = dg_tmp_val & 0x7f;
+ dg_hc_del = (dg_tmp_val & 0x780) << 1;
+
+ val_ctrl |= (dg_dl_abs_offset + dg_hc_del) << 16;
+
+ writel(val_ctrl, reg_ctrl);
+}
+
+int mmdc_do_write_level_calibration(struct mx6_ddr_sysinfo const *sysinfo)
+{
+ struct mmdc_p_regs *mmdc0 = (struct mmdc_p_regs *)MMDC_P0_BASE_ADDR;
+ struct mmdc_p_regs *mmdc1 = (struct mmdc_p_regs *)MMDC_P1_BASE_ADDR;
+ u32 esdmisc_val, zq_val;
+ u32 errors = 0;
+ u32 ldectrl[4] = {0};
+ u32 ddr_mr1 = 0x4;
+ u32 rwalat_max;
+
+ /*
+ * Stash old values in case calibration fails,
+ * we need to restore them
+ */
+ ldectrl[0] = readl(&mmdc0->mpwldectrl0);
+ ldectrl[1] = readl(&mmdc0->mpwldectrl1);
+ if (sysinfo->dsize == 2) {
+ ldectrl[2] = readl(&mmdc1->mpwldectrl0);
+ ldectrl[3] = readl(&mmdc1->mpwldectrl1);
+ }
+
+ /* disable DDR logic power down timer */
+ clrbits_le32(&mmdc0->mdpdc, 0xff00);
+
+ /* disable Adopt power down timer */
+ setbits_le32(&mmdc0->mapsr, 0x1);
+
+ debug("Starting write leveling calibration.\n");
+
+ /*
+ * 2. disable auto refresh and ZQ calibration
+ * before proceeding with Write Leveling calibration
+ */
+ esdmisc_val = readl(&mmdc0->mdref);
+ writel(0x0000C000, &mmdc0->mdref);
+ zq_val = readl(&mmdc0->mpzqhwctrl);
+ writel(zq_val & ~0x3, &mmdc0->mpzqhwctrl);
+
+ /* 3. increase walat and ralat to maximum */
+ rwalat_max = (1 << 6) | (1 << 7) | (1 << 8) | (1 << 16) | (1 << 17);
+ setbits_le32(&mmdc0->mdmisc, rwalat_max);
+ if (sysinfo->dsize == 2)
+ setbits_le32(&mmdc1->mdmisc, rwalat_max);
+ /*
+ * 4 & 5. Configure the external DDR device to enter write-leveling
+ * mode through Load Mode Register command.
+ * Register setting:
+ * Bits[31:16] MR1 value (0x0080 write leveling enable)
+ * Bit[9] set WL_EN to enable MMDC DQS output
+ * Bits[6:4] set CMD bits for Load Mode Register programming
+ * Bits[2:0] set CMD_BA to 0x1 for DDR MR1 programming
+ */
+ writel(0x00808231, &mmdc0->mdscr);
+
+ /* 6. Activate automatic calibration by setting MPWLGCR[HW_WL_EN] */
+ writel(0x00000001, &mmdc0->mpwlgcr);
+
+ /*
+ * 7. Upon completion of this process the MMDC de-asserts
+ * the MPWLGCR[HW_WL_EN]
+ */
+ wait_for_bit("MMDC", &mmdc0->mpwlgcr, 1 << 0, 0, 100, 0);
+
+ /*
+ * 8. check for any errors: check both PHYs for x64 configuration,
+ * if x32, check only PHY0
+ */
+ if (readl(&mmdc0->mpwlgcr) & 0x00000F00)
+ errors |= 1;
+ if (sysinfo->dsize == 2)
+ if (readl(&mmdc1->mpwlgcr) & 0x00000F00)
+ errors |= 2;
+
+ debug("Ending write leveling calibration. Error mask: 0x%x\n", errors);
+
+ /* check to see if cal failed */
+ if ((readl(&mmdc0->mpwldectrl0) == 0x001F001F) &&
+ (readl(&mmdc0->mpwldectrl1) == 0x001F001F) &&
+ ((sysinfo->dsize < 2) ||
+ ((readl(&mmdc1->mpwldectrl0) == 0x001F001F) &&
+ (readl(&mmdc1->mpwldectrl1) == 0x001F001F)))) {
+ debug("Cal seems to have soft-failed due to memory not supporting write leveling on all channels. Restoring original write leveling values.\n");
+ writel(ldectrl[0], &mmdc0->mpwldectrl0);
+ writel(ldectrl[1], &mmdc0->mpwldectrl1);
+ if (sysinfo->dsize == 2) {
+ writel(ldectrl[2], &mmdc1->mpwldectrl0);
+ writel(ldectrl[3], &mmdc1->mpwldectrl1);
+ }
+ errors |= 4;
+ }
+
+ /*
+ * User should issue MRS command to exit write leveling mode
+ * through Load Mode Register command
+ * Register setting:
+ * Bits[31:16] MR1 value "ddr_mr1" value from initialization
+ * Bit[9] clear WL_EN to disable MMDC DQS output
+ * Bits[6:4] set CMD bits for Load Mode Register programming
+ * Bits[2:0] set CMD_BA to 0x1 for DDR MR1 programming
+ */
+ writel((ddr_mr1 << 16) + 0x8031, &mmdc0->mdscr);
+
+ /* re-enable auto refresh and zq cal */
+ writel(esdmisc_val, &mmdc0->mdref);
+ writel(zq_val, &mmdc0->mpzqhwctrl);
+
+ debug("\tMMDC_MPWLDECTRL0 after write level cal: 0x%08X\n",
+ readl(&mmdc0->mpwldectrl0));
+ debug("\tMMDC_MPWLDECTRL1 after write level cal: 0x%08X\n",
+ readl(&mmdc0->mpwldectrl1));
+ if (sysinfo->dsize == 2) {
+ debug("\tMMDC_MPWLDECTRL0 after write level cal: 0x%08X\n",
+ readl(&mmdc1->mpwldectrl0));
+ debug("\tMMDC_MPWLDECTRL1 after write level cal: 0x%08X\n",
+ readl(&mmdc1->mpwldectrl1));
+ }
+
+ /* We must force a readback of these values, to get them to stick */
+ readl(&mmdc0->mpwldectrl0);
+ readl(&mmdc0->mpwldectrl1);
+ if (sysinfo->dsize == 2) {
+ readl(&mmdc1->mpwldectrl0);
+ readl(&mmdc1->mpwldectrl1);
+ }
+
+ /* enable DDR logic power down timer: */
+ setbits_le32(&mmdc0->mdpdc, 0x00005500);
+
+ /* Enable Adopt power down timer: */
+ clrbits_le32(&mmdc0->mapsr, 0x1);
+
+ /* Clear CON_REQ */
+ writel(0, &mmdc0->mdscr);
+
+ return errors;
+}
+
+int mmdc_do_dqs_calibration(struct mx6_ddr_sysinfo const *sysinfo)
+{
+ struct mmdc_p_regs *mmdc0 = (struct mmdc_p_regs *)MMDC_P0_BASE_ADDR;
+ struct mmdc_p_regs *mmdc1 = (struct mmdc_p_regs *)MMDC_P1_BASE_ADDR;
+ struct mx6dq_iomux_ddr_regs *mx6_ddr_iomux =
+ (struct mx6dq_iomux_ddr_regs *)MX6DQ_IOM_DDR_BASE;
+ bool cs0_enable;
+ bool cs1_enable;
+ bool cs0_enable_initial;
+ bool cs1_enable_initial;
+ u32 esdmisc_val;
+ u32 temp_ref;
+ u32 pddword = 0x00ffff00; /* best so far, place into MPPDCMPR1 */
+ u32 errors = 0;
+ u32 initdelay = 0x40404040;
+
+ /* check to see which chip selects are enabled */
+ cs0_enable_initial = readl(&mmdc0->mdctl) & 0x80000000;
+ cs1_enable_initial = readl(&mmdc0->mdctl) & 0x40000000;
+
+ /* disable DDR logic power down timer: */
+ clrbits_le32(&mmdc0->mdpdc, 0xff00);
+
+ /* disable Adopt power down timer: */
+ setbits_le32(&mmdc0->mapsr, 0x1);
+
+ /* set DQS pull ups */
+ setbits_le32(&mx6_ddr_iomux->dram_sdqs0, 0x7000);
+ setbits_le32(&mx6_ddr_iomux->dram_sdqs1, 0x7000);
+ setbits_le32(&mx6_ddr_iomux->dram_sdqs2, 0x7000);
+ setbits_le32(&mx6_ddr_iomux->dram_sdqs3, 0x7000);
+ setbits_le32(&mx6_ddr_iomux->dram_sdqs4, 0x7000);
+ setbits_le32(&mx6_ddr_iomux->dram_sdqs5, 0x7000);
+ setbits_le32(&mx6_ddr_iomux->dram_sdqs6, 0x7000);
+ setbits_le32(&mx6_ddr_iomux->dram_sdqs7, 0x7000);
+
+ /* Save old RALAT and WALAT values */
+ esdmisc_val = readl(&mmdc0->mdmisc);
+
+ setbits_le32(&mmdc0->mdmisc,
+ (1 << 6) | (1 << 7) | (1 << 8) | (1 << 16) | (1 << 17));
+
+ /* Disable auto refresh before proceeding with calibration */
+ temp_ref = readl(&mmdc0->mdref);
+ writel(0x0000c000, &mmdc0->mdref);
+
+ /*
+ * Per the ref manual, issue one refresh cycle MDSCR[CMD]= 0x2,
+ * this also sets the CON_REQ bit.
+ */
+ if (cs0_enable_initial)
+ writel(0x00008020, &mmdc0->mdscr);
+ if (cs1_enable_initial)
+ writel(0x00008028, &mmdc0->mdscr);
+
+ /* poll to make sure the con_ack bit was asserted */
+ wait_for_bit("MMDC", &mmdc0->mdscr, 1 << 14, 1, 100, 0);
+
+ /*
+ * Check MDMISC register CALIB_PER_CS to see which CS calibration
+ * is targeted to (under normal cases, it should be cleared
+ * as this is the default value, indicating calibration is directed
+ * to CS0).
+ * Disable the other chip select not being target for calibration
+ * to avoid any potential issues. This will get re-enabled at end
+ * of calibration.
+ */
+ if ((readl(&mmdc0->mdmisc) & 0x00100000) == 0)
+ clrbits_le32(&mmdc0->mdctl, 1 << 30); /* clear SDE_1 */
+ else
+ clrbits_le32(&mmdc0->mdctl, 1 << 31); /* clear SDE_0 */
+
+ /*
+ * Check to see which chip selects are now enabled for
+ * the remainder of the calibration.
+ */
+ cs0_enable = readl(&mmdc0->mdctl) & 0x80000000;
+ cs1_enable = readl(&mmdc0->mdctl) & 0x40000000;
+
+ precharge_all(cs0_enable, cs1_enable);
+
+ /* Write the pre-defined value into MPPDCMPR1 */
+ writel(pddword, &mmdc0->mppdcmpr1);
+
+ /*
+ * Issue a write access to the external DDR device by setting
+ * the bit SW_DUMMY_WR (bit 0) in the MPSWDAR0 and then poll
+ * this bit until it clears to indicate completion of the write access.
+ */
+ setbits_le32(&mmdc0->mpswdar0, 1);
+ wait_for_bit("MMDC", &mmdc0->mpswdar0, 1 << 0, 0, 100, 0);
+
+ /* Set the RD_DL_ABS# bits to their default values
+ * (will be calibrated later in the read delay-line calibration).
+ * Both PHYs for x64 configuration, if x32, do only PHY0.
+ */
+ writel(initdelay, &mmdc0->mprddlctl);
+ if (sysinfo->dsize == 0x2)
+ writel(initdelay, &mmdc1->mprddlctl);
+
+ /* Force a measurment, for previous delay setup to take effect. */
+ force_delay_measurement(sysinfo->dsize);
+
+ /*
+ * ***************************
+ * Read DQS Gating calibration
+ * ***************************
+ */
+ debug("Starting Read DQS Gating calibration.\n");
+
+ /*
+ * Reset the read data FIFOs (two resets); only need to issue reset
+ * to PHY0 since in x64 mode, the reset will also go to PHY1.
+ */
+ reset_read_data_fifos();
+
+ /*
+ * Start the automatic read DQS gating calibration process by
+ * asserting MPDGCTRL0[HW_DG_EN] and MPDGCTRL0[DG_CMP_CYC]
+ * and then poll MPDGCTRL0[HW_DG_EN]] until this bit clears
+ * to indicate completion.
+ * Also, ensure that MPDGCTRL0[HW_DG_ERR] is clear to indicate
+ * no errors were seen during calibration.
+ */
+
+ /*
+ * Set bit 30: chooses option to wait 32 cycles instead of
+ * 16 before comparing read data.
+ */
+ setbits_le32(&mmdc0->mpdgctrl0, 1 << 30);
+ if (sysinfo->dsize == 2)
+ setbits_le32(&mmdc1->mpdgctrl0, 1 << 30);
+
+ /* Set bit 28 to start automatic read DQS gating calibration */
+ setbits_le32(&mmdc0->mpdgctrl0, 5 << 28);
+
+ /* Poll for completion. MPDGCTRL0[HW_DG_EN] should be 0 */
+ wait_for_bit("MMDC", &mmdc0->mpdgctrl0, 1 << 28, 0, 100, 0);
+
+ /*
+ * Check to see if any errors were encountered during calibration
+ * (check MPDGCTRL0[HW_DG_ERR]).
+ * Check both PHYs for x64 configuration, if x32, check only PHY0.
+ */
+ if (readl(&mmdc0->mpdgctrl0) & 0x00001000)
+ errors |= 1;
+
+ if ((sysinfo->dsize == 0x2) && (readl(&mmdc1->mpdgctrl0) & 0x00001000))
+ errors |= 2;
+
+ /* now disable mpdgctrl0[DG_CMP_CYC] */
+ clrbits_le32(&mmdc0->mpdgctrl0, 1 << 30);
+ if (sysinfo->dsize == 2)
+ clrbits_le32(&mmdc1->mpdgctrl0, 1 << 30);
+
+ /*
+ * DQS gating absolute offset should be modified from
+ * reflecting (HW_DG_LOWx + HW_DG_UPx)/2 to
+ * reflecting (HW_DG_UPx - 0x80)
+ */
+ modify_dg_result(&mmdc0->mpdghwst0, &mmdc0->mpdghwst1,
+ &mmdc0->mpdgctrl0);
+ modify_dg_result(&mmdc0->mpdghwst2, &mmdc0->mpdghwst3,
+ &mmdc0->mpdgctrl1);
+ if (sysinfo->dsize == 0x2) {
+ modify_dg_result(&mmdc1->mpdghwst0, &mmdc1->mpdghwst1,
+ &mmdc1->mpdgctrl0);
+ modify_dg_result(&mmdc1->mpdghwst2, &mmdc1->mpdghwst3,
+ &mmdc1->mpdgctrl1);
+ }
+ debug("Ending Read DQS Gating calibration. Error mask: 0x%x\n", errors);
+
+ /*
+ * **********************
+ * Read Delay calibration
+ * **********************
+ */
+ debug("Starting Read Delay calibration.\n");
+
+ reset_read_data_fifos();
+
+ /*
+ * 4. Issue the Precharge-All command to the DDR device for both
+ * chip selects. If only using one chip select, then precharge
+ * only the desired chip select.
+ */
+ precharge_all(cs0_enable, cs1_enable);
+
+ /*
+ * 9. Read delay-line calibration
+ * Start the automatic read calibration process by asserting
+ * MPRDDLHWCTL[HW_RD_DL_EN].
+ */
+ writel(0x00000030, &mmdc0->mprddlhwctl);
+
+ /*
+ * 10. poll for completion
+ * MMDC indicates that the write data calibration had finished by
+ * setting MPRDDLHWCTL[HW_RD_DL_EN] = 0. Also, ensure that
+ * no error bits were set.
+ */
+ wait_for_bit("MMDC", &mmdc0->mprddlhwctl, 1 << 4, 0, 100, 0);
+
+ /* check both PHYs for x64 configuration, if x32, check only PHY0 */
+ if (readl(&mmdc0->mprddlhwctl) & 0x0000000f)
+ errors |= 4;
+
+ if ((sysinfo->dsize == 0x2) &&
+ (readl(&mmdc1->mprddlhwctl) & 0x0000000f))
+ errors |= 8;
+
+ debug("Ending Read Delay calibration. Error mask: 0x%x\n", errors);
+
+ /*
+ * ***********************
+ * Write Delay Calibration
+ * ***********************
+ */
+ debug("Starting Write Delay calibration.\n");
+
+ reset_read_data_fifos();
+
+ /*
+ * 4. Issue the Precharge-All command to the DDR device for both
+ * chip selects. If only using one chip select, then precharge
+ * only the desired chip select.
+ */
+ precharge_all(cs0_enable, cs1_enable);
+
+ /*
+ * 8. Set the WR_DL_ABS# bits to their default values.
+ * Both PHYs for x64 configuration, if x32, do only PHY0.
+ */
+ writel(initdelay, &mmdc0->mpwrdlctl);
+ if (sysinfo->dsize == 0x2)
+ writel(initdelay, &mmdc1->mpwrdlctl);
+
+ /*
+ * XXX This isn't in the manual. Force a measurement,
+ * for previous delay setup to effect.
+ */
+ force_delay_measurement(sysinfo->dsize);
+
+ /*
+ * 9. 10. Start the automatic write calibration process
+ * by asserting MPWRDLHWCTL0[HW_WR_DL_EN].
+ */
+ writel(0x00000030, &mmdc0->mpwrdlhwctl);
+
+ /*
+ * Poll for completion.
+ * MMDC indicates that the write data calibration had finished
+ * by setting MPWRDLHWCTL[HW_WR_DL_EN] = 0.
+ * Also, ensure that no error bits were set.
+ */
+ wait_for_bit("MMDC", &mmdc0->mpwrdlhwctl, 1 << 4, 0, 100, 0);
+
+ /* Check both PHYs for x64 configuration, if x32, check only PHY0 */
+ if (readl(&mmdc0->mpwrdlhwctl) & 0x0000000f)
+ errors |= 16;
+
+ if ((sysinfo->dsize == 0x2) &&
+ (readl(&mmdc1->mpwrdlhwctl) & 0x0000000f))
+ errors |= 32;
+
+ debug("Ending Write Delay calibration. Error mask: 0x%x\n", errors);
+
+ reset_read_data_fifos();
+
+ /* Enable DDR logic power down timer */
+ setbits_le32(&mmdc0->mdpdc, 0x00005500);
+
+ /* Enable Adopt power down timer */
+ clrbits_le32(&mmdc0->mapsr, 0x1);
+
+ /* Restore MDMISC value (RALAT, WALAT) to MMDCP1 */
+ writel(esdmisc_val, &mmdc0->mdmisc);
+
+ /* Clear DQS pull ups */
+ clrbits_le32(&mx6_ddr_iomux->dram_sdqs0, 0x7000);
+ clrbits_le32(&mx6_ddr_iomux->dram_sdqs1, 0x7000);
+ clrbits_le32(&mx6_ddr_iomux->dram_sdqs2, 0x7000);
+ clrbits_le32(&mx6_ddr_iomux->dram_sdqs3, 0x7000);
+ clrbits_le32(&mx6_ddr_iomux->dram_sdqs4, 0x7000);
+ clrbits_le32(&mx6_ddr_iomux->dram_sdqs5, 0x7000);
+ clrbits_le32(&mx6_ddr_iomux->dram_sdqs6, 0x7000);
+ clrbits_le32(&mx6_ddr_iomux->dram_sdqs7, 0x7000);
+
+ /* Re-enable SDE (chip selects) if they were set initially */
+ if (cs1_enable_initial)
+ /* Set SDE_1 */
+ setbits_le32(&mmdc0->mdctl, 1 << 30);
+
+ if (cs0_enable_initial)
+ /* Set SDE_0 */
+ setbits_le32(&mmdc0->mdctl, 1 << 31);
+
+ /* Re-enable to auto refresh */
+ writel(temp_ref, &mmdc0->mdref);
+
+ /* Clear the MDSCR (including the con_req bit) */
+ writel(0x0, &mmdc0->mdscr); /* CS0 */
+
+ /* Poll to make sure the con_ack bit is clear */
+ wait_for_bit("MMDC", &mmdc0->mdscr, 1 << 14, 0, 100, 0);
+
+ /*
+ * Print out the registers that were updated as a result
+ * of the calibration process.
+ */
+ debug("MMDC registers updated from calibration\n");
+ debug("Read DQS gating calibration:\n");
+ debug("\tMPDGCTRL0 PHY0 = 0x%08X\n", readl(&mmdc0->mpdgctrl0));
+ debug("\tMPDGCTRL1 PHY0 = 0x%08X\n", readl(&mmdc0->mpdgctrl1));
+ if (sysinfo->dsize == 2) {
+ debug("\tMPDGCTRL0 PHY1 = 0x%08X\n", readl(&mmdc1->mpdgctrl0));
+ debug("\tMPDGCTRL1 PHY1 = 0x%08X\n", readl(&mmdc1->mpdgctrl1));
+ }
+ debug("Read calibration:\n");
+ debug("\tMPRDDLCTL PHY0 = 0x%08X\n", readl(&mmdc0->mprddlctl));
+ if (sysinfo->dsize == 2)
+ debug("\tMPRDDLCTL PHY1 = 0x%08X\n", readl(&mmdc1->mprddlctl));
+ debug("Write calibration:\n");
+ debug("\tMPWRDLCTL PHY0 = 0x%08X\n", readl(&mmdc0->mpwrdlctl));
+ if (sysinfo->dsize == 2)
+ debug("\tMPWRDLCTL PHY1 = 0x%08X\n", readl(&mmdc1->mpwrdlctl));
+
+ /*
+ * Registers below are for debugging purposes. These print out
+ * the upper and lower boundaries captured during
+ * read DQS gating calibration.
+ */
+ debug("Status registers bounds for read DQS gating:\n");
+ debug("\tMPDGHWST0 PHY0 = 0x%08x\n", readl(&mmdc0->mpdghwst0));
+ debug("\tMPDGHWST1 PHY0 = 0x%08x\n", readl(&mmdc0->mpdghwst1));
+ debug("\tMPDGHWST2 PHY0 = 0x%08x\n", readl(&mmdc0->mpdghwst2));
+ debug("\tMPDGHWST3 PHY0 = 0x%08x\n", readl(&mmdc0->mpdghwst3));
+ if (sysinfo->dsize == 2) {
+ debug("\tMPDGHWST0 PHY1 = 0x%08x\n", readl(&mmdc1->mpdghwst0));
+ debug("\tMPDGHWST1 PHY1 = 0x%08x\n", readl(&mmdc1->mpdghwst1));
+ debug("\tMPDGHWST2 PHY1 = 0x%08x\n", readl(&mmdc1->mpdghwst2));
+ debug("\tMPDGHWST3 PHY1 = 0x%08x\n", readl(&mmdc1->mpdghwst3));
+ }
+
+ debug("Final do_dqs_calibration error mask: 0x%x\n", errors);
+
+ return errors;
+}
+#endif
#if defined(CONFIG_MX6SX)
/* Configure MX6SX mmdc iomux */
}
#endif
+#ifdef CONFIG_MX6UL
+void mx6ul_dram_iocfg(unsigned width,
+ const struct mx6ul_iomux_ddr_regs *ddr,
+ const struct mx6ul_iomux_grp_regs *grp)
+{
+ struct mx6ul_iomux_ddr_regs *mx6_ddr_iomux;
+ struct mx6ul_iomux_grp_regs *mx6_grp_iomux;
+
+ mx6_ddr_iomux = (struct mx6ul_iomux_ddr_regs *)MX6UL_IOM_DDR_BASE;
+ mx6_grp_iomux = (struct mx6ul_iomux_grp_regs *)MX6UL_IOM_GRP_BASE;
+
+ /* DDR IO TYPE */
+ writel(grp->grp_ddr_type, &mx6_grp_iomux->grp_ddr_type);
+ writel(grp->grp_ddrpke, &mx6_grp_iomux->grp_ddrpke);
+
+ /* CLOCK */
+ writel(ddr->dram_sdclk_0, &mx6_ddr_iomux->dram_sdclk_0);
+
+ /* ADDRESS */
+ writel(ddr->dram_cas, &mx6_ddr_iomux->dram_cas);
+ writel(ddr->dram_ras, &mx6_ddr_iomux->dram_ras);
+ writel(grp->grp_addds, &mx6_grp_iomux->grp_addds);
+
+ /* Control */
+ writel(ddr->dram_reset, &mx6_ddr_iomux->dram_reset);
+ writel(ddr->dram_sdba2, &mx6_ddr_iomux->dram_sdba2);
+ writel(ddr->dram_odt0, &mx6_ddr_iomux->dram_odt0);
+ writel(ddr->dram_odt1, &mx6_ddr_iomux->dram_odt1);
+ writel(grp->grp_ctlds, &mx6_grp_iomux->grp_ctlds);
+
+ /* Data Strobes */
+ writel(grp->grp_ddrmode_ctl, &mx6_grp_iomux->grp_ddrmode_ctl);
+ writel(ddr->dram_sdqs0, &mx6_ddr_iomux->dram_sdqs0);
+ writel(ddr->dram_sdqs1, &mx6_ddr_iomux->dram_sdqs1);
+
+ /* Data */
+ writel(grp->grp_ddrmode, &mx6_grp_iomux->grp_ddrmode);
+ writel(grp->grp_b0ds, &mx6_grp_iomux->grp_b0ds);
+ writel(grp->grp_b1ds, &mx6_grp_iomux->grp_b1ds);
+ writel(ddr->dram_dqm0, &mx6_ddr_iomux->dram_dqm0);
+ writel(ddr->dram_dqm1, &mx6_ddr_iomux->dram_dqm1);
+}
+#endif
+
+#if defined(CONFIG_MX6SL)
+void mx6sl_dram_iocfg(unsigned width,
+ const struct mx6sl_iomux_ddr_regs *ddr,
+ const struct mx6sl_iomux_grp_regs *grp)
+{
+ struct mx6sl_iomux_ddr_regs *mx6_ddr_iomux;
+ struct mx6sl_iomux_grp_regs *mx6_grp_iomux;
+
+ mx6_ddr_iomux = (struct mx6sl_iomux_ddr_regs *)MX6SL_IOM_DDR_BASE;
+ mx6_grp_iomux = (struct mx6sl_iomux_grp_regs *)MX6SL_IOM_GRP_BASE;
+
+ /* DDR IO TYPE */
+ mx6_grp_iomux->grp_ddr_type = grp->grp_ddr_type;
+ mx6_grp_iomux->grp_ddrpke = grp->grp_ddrpke;
+
+ /* CLOCK */
+ mx6_ddr_iomux->dram_sdclk_0 = ddr->dram_sdclk_0;
+
+ /* ADDRESS */
+ mx6_ddr_iomux->dram_cas = ddr->dram_cas;
+ mx6_ddr_iomux->dram_ras = ddr->dram_ras;
+ mx6_grp_iomux->grp_addds = grp->grp_addds;
+
+ /* Control */
+ mx6_ddr_iomux->dram_reset = ddr->dram_reset;
+ mx6_ddr_iomux->dram_sdba2 = ddr->dram_sdba2;
+ mx6_grp_iomux->grp_ctlds = grp->grp_ctlds;
+
+ /* Data Strobes */
+ mx6_grp_iomux->grp_ddrmode_ctl = grp->grp_ddrmode_ctl;
+ mx6_ddr_iomux->dram_sdqs0 = ddr->dram_sdqs0;
+ mx6_ddr_iomux->dram_sdqs1 = ddr->dram_sdqs1;
+ if (width >= 32) {
+ mx6_ddr_iomux->dram_sdqs2 = ddr->dram_sdqs2;
+ mx6_ddr_iomux->dram_sdqs3 = ddr->dram_sdqs3;
+ }
+
+ /* Data */
+ mx6_grp_iomux->grp_ddrmode = grp->grp_ddrmode;
+ mx6_grp_iomux->grp_b0ds = grp->grp_b0ds;
+ mx6_grp_iomux->grp_b1ds = grp->grp_b1ds;
+ if (width >= 32) {
+ mx6_grp_iomux->grp_b2ds = grp->grp_b2ds;
+ mx6_grp_iomux->grp_b3ds = grp->grp_b3ds;
+ }
+
+ mx6_ddr_iomux->dram_dqm0 = ddr->dram_dqm0;
+ mx6_ddr_iomux->dram_dqm1 = ddr->dram_dqm1;
+ if (width >= 32) {
+ mx6_ddr_iomux->dram_dqm2 = ddr->dram_dqm2;
+ mx6_ddr_iomux->dram_dqm3 = ddr->dram_dqm3;
+ }
+}
+#endif
+
#if defined(CONFIG_MX6QDL) || defined(CONFIG_MX6Q) || defined(CONFIG_MX6D)
/* Configure MX6DQ mmdc iomux */
void mx6dq_dram_iocfg(unsigned width,
* Configure mx6 mmdc registers based on:
* - board-specific memory configuration
* - board-specific calibration data
- * - ddr3 chip details
+ * - ddr3/lpddr2 chip details
*
* The various calculations here are derived from the Freescale
- * i.Mx6DQSDL DDR3 Script Aid spreadsheet (DOC-94917) designed to generate MMDC
- * configuration registers based on memory system and memory chip parameters.
+ * 1. i.Mx6DQSDL DDR3 Script Aid spreadsheet (DOC-94917) designed to generate
+ * MMDC configuration registers based on memory system and memory chip
+ * parameters.
+ *
+ * 2. i.Mx6SL LPDDR2 Script Aid spreadsheet V0.04 designed to generate MMDC
+ * configuration registers based on memory system and memory chip
+ * parameters.
*
* The defaults here are those which were specified in the spreadsheet.
* For details on each register, refer to the IMX6DQRM and/or IMX6SDLRM
- * section titled MMDC initialization
+ * and/or IMX6SLRM section titled MMDC initialization.
*/
#define MR(val, ba, cmd, cs1) \
((val << 16) | (1 << 15) | (cmd << 4) | (cs1 << 3) | ba)
-#ifdef CONFIG_MX6SX
-#define MMDC1(entry, value) do {} while (0)
-#else
-#define MMDC1(entry, value) do { mmdc1->entry = value; } while (0)
-#endif
-void mx6_dram_cfg(const struct mx6_ddr_sysinfo *sysinfo,
+#define MMDC1(entry, value) do { \
+ if (!is_mx6sx() && !is_mx6ul() && !is_mx6sl()) \
+ mmdc1->entry = value; \
+ } while (0)
+
+/*
+ * According JESD209-2B-LPDDR2: Table 103
+ * WL: write latency
+ */
+static int lpddr2_wl(uint32_t mem_speed)
+{
+ switch (mem_speed) {
+ case 1066:
+ case 933:
+ return 4;
+ case 800:
+ return 3;
+ case 677:
+ case 533:
+ return 2;
+ case 400:
+ case 333:
+ return 1;
+ default:
+ puts("invalid memory speed\n");
+ hang();
+ }
+
+ return 0;
+}
+
+/*
+ * According JESD209-2B-LPDDR2: Table 103
+ * RL: read latency
+ */
+static int lpddr2_rl(uint32_t mem_speed)
+{
+ switch (mem_speed) {
+ case 1066:
+ return 8;
+ case 933:
+ return 7;
+ case 800:
+ return 6;
+ case 677:
+ return 5;
+ case 533:
+ return 4;
+ case 400:
+ case 333:
+ return 3;
+ default:
+ puts("invalid memory speed\n");
+ hang();
+ }
+
+ return 0;
+}
+
+void mx6_lpddr2_cfg(const struct mx6_ddr_sysinfo *sysinfo,
+ const struct mx6_mmdc_calibration *calib,
+ const struct mx6_lpddr2_cfg *lpddr2_cfg)
+{
+ volatile struct mmdc_p_regs *mmdc0;
+ u32 val;
+ u8 tcke, tcksrx, tcksre, trrd;
+ u8 twl, txp, tfaw, tcl;
+ u16 tras, twr, tmrd, trtp, twtr, trfc, txsr;
+ u16 trcd_lp, trppb_lp, trpab_lp, trc_lp;
+ u16 cs0_end;
+ u8 coladdr;
+ int clkper; /* clock period in picoseconds */
+ int clock; /* clock freq in mHz */
+ int cs;
+
+ /* only support 16/32 bits */
+ if (sysinfo->dsize > 1)
+ hang();
+
+ mmdc0 = (struct mmdc_p_regs *)MMDC_P0_BASE_ADDR;
+
+ clock = mxc_get_clock(MXC_DDR_CLK) / 1000000U;
+ clkper = (1000 * 1000) / clock; /* pico seconds */
+
+ twl = lpddr2_wl(lpddr2_cfg->mem_speed) - 1;
+
+ /* LPDDR2-S2 and LPDDR2-S4 have the same tRFC value. */
+ switch (lpddr2_cfg->density) {
+ case 1:
+ case 2:
+ case 4:
+ trfc = DIV_ROUND_UP(130000, clkper) - 1;
+ txsr = DIV_ROUND_UP(140000, clkper) - 1;
+ break;
+ case 8:
+ trfc = DIV_ROUND_UP(210000, clkper) - 1;
+ txsr = DIV_ROUND_UP(220000, clkper) - 1;
+ break;
+ default:
+ /*
+ * 64Mb, 128Mb, 256Mb, 512Mb are not supported currently.
+ */
+ hang();
+ break;
+ }
+ /*
+ * txpdll, txpr, taonpd and taofpd are not relevant in LPDDR2 mode,
+ * set them to 0. */
+ txp = DIV_ROUND_UP(7500, clkper) - 1;
+ tcke = 3;
+ if (lpddr2_cfg->mem_speed == 333)
+ tfaw = DIV_ROUND_UP(60000, clkper) - 1;
+ else
+ tfaw = DIV_ROUND_UP(50000, clkper) - 1;
+ trrd = DIV_ROUND_UP(10000, clkper) - 1;
+
+ /* tckesr for LPDDR2 */
+ tcksre = DIV_ROUND_UP(15000, clkper);
+ tcksrx = tcksre;
+ twr = DIV_ROUND_UP(15000, clkper) - 1;
+ /*
+ * tMRR: 2, tMRW: 5
+ * tMRD should be set to max(tMRR, tMRW)
+ */
+ tmrd = 5;
+ tras = DIV_ROUND_UP(lpddr2_cfg->trasmin, clkper / 10) - 1;
+ /* LPDDR2 mode use tRCD_LP filed in MDCFG3. */
+ trcd_lp = DIV_ROUND_UP(lpddr2_cfg->trcd_lp, clkper / 10) - 1;
+ trc_lp = DIV_ROUND_UP(lpddr2_cfg->trasmin + lpddr2_cfg->trppb_lp,
+ clkper / 10) - 1;
+ trppb_lp = DIV_ROUND_UP(lpddr2_cfg->trppb_lp, clkper / 10) - 1;
+ trpab_lp = DIV_ROUND_UP(lpddr2_cfg->trpab_lp, clkper / 10) - 1;
+ /* To LPDDR2, CL in MDCFG0 refers to RL */
+ tcl = lpddr2_rl(lpddr2_cfg->mem_speed) - 3;
+ twtr = DIV_ROUND_UP(7500, clkper) - 1;
+ trtp = DIV_ROUND_UP(7500, clkper) - 1;
+
+ cs0_end = 4 * sysinfo->cs_density - 1;
+
+ debug("density:%d Gb (%d Gb per chip)\n",
+ sysinfo->cs_density, lpddr2_cfg->density);
+ debug("clock: %dMHz (%d ps)\n", clock, clkper);
+ debug("memspd:%d\n", lpddr2_cfg->mem_speed);
+ debug("trcd_lp=%d\n", trcd_lp);
+ debug("trppb_lp=%d\n", trppb_lp);
+ debug("trpab_lp=%d\n", trpab_lp);
+ debug("trc_lp=%d\n", trc_lp);
+ debug("tcke=%d\n", tcke);
+ debug("tcksrx=%d\n", tcksrx);
+ debug("tcksre=%d\n", tcksre);
+ debug("trfc=%d\n", trfc);
+ debug("txsr=%d\n", txsr);
+ debug("txp=%d\n", txp);
+ debug("tfaw=%d\n", tfaw);
+ debug("tcl=%d\n", tcl);
+ debug("tras=%d\n", tras);
+ debug("twr=%d\n", twr);
+ debug("tmrd=%d\n", tmrd);
+ debug("twl=%d\n", twl);
+ debug("trtp=%d\n", trtp);
+ debug("twtr=%d\n", twtr);
+ debug("trrd=%d\n", trrd);
+ debug("cs0_end=%d\n", cs0_end);
+ debug("ncs=%d\n", sysinfo->ncs);
+
+ /*
+ * board-specific configuration:
+ * These values are determined empirically and vary per board layout
+ */
+ mmdc0->mpwldectrl0 = calib->p0_mpwldectrl0;
+ mmdc0->mpwldectrl1 = calib->p0_mpwldectrl1;
+ mmdc0->mpdgctrl0 = calib->p0_mpdgctrl0;
+ mmdc0->mpdgctrl1 = calib->p0_mpdgctrl1;
+ mmdc0->mprddlctl = calib->p0_mprddlctl;
+ mmdc0->mpwrdlctl = calib->p0_mpwrdlctl;
+ mmdc0->mpzqlp2ctl = calib->mpzqlp2ctl;
+
+ /* Read data DQ Byte0-3 delay */
+ mmdc0->mprddqby0dl = 0x33333333;
+ mmdc0->mprddqby1dl = 0x33333333;
+ if (sysinfo->dsize > 0) {
+ mmdc0->mprddqby2dl = 0x33333333;
+ mmdc0->mprddqby3dl = 0x33333333;
+ }
+
+ /* Write data DQ Byte0-3 delay */
+ mmdc0->mpwrdqby0dl = 0xf3333333;
+ mmdc0->mpwrdqby1dl = 0xf3333333;
+ if (sysinfo->dsize > 0) {
+ mmdc0->mpwrdqby2dl = 0xf3333333;
+ mmdc0->mpwrdqby3dl = 0xf3333333;
+ }
+
+ /*
+ * In LPDDR2 mode this register should be cleared,
+ * so no termination will be activated.
+ */
+ mmdc0->mpodtctrl = 0;
+
+ /* complete calibration */
+ val = (1 << 11); /* Force measurement on delay-lines */
+ mmdc0->mpmur0 = val;
+
+ /* Step 1: configuration request */
+ mmdc0->mdscr = (u32)(1 << 15); /* config request */
+
+ /* Step 2: Timing configuration */
+ mmdc0->mdcfg0 = (trfc << 24) | (txsr << 16) | (txp << 13) |
+ (tfaw << 4) | tcl;
+ mmdc0->mdcfg1 = (tras << 16) | (twr << 9) | (tmrd << 5) | twl;
+ mmdc0->mdcfg2 = (trtp << 6) | (twtr << 3) | trrd;
+ mmdc0->mdcfg3lp = (trc_lp << 16) | (trcd_lp << 8) |
+ (trppb_lp << 4) | trpab_lp;
+ mmdc0->mdotc = 0;
+
+ mmdc0->mdasp = cs0_end; /* CS addressing */
+
+ /* Step 3: Configure DDR type */
+ mmdc0->mdmisc = (sysinfo->cs1_mirror << 19) | (sysinfo->walat << 16) |
+ (sysinfo->bi_on << 12) | (sysinfo->mif3_mode << 9) |
+ (sysinfo->ralat << 6) | (1 << 3);
+
+ /* Step 4: Configure delay while leaving reset */
+ mmdc0->mdor = (sysinfo->sde_to_rst << 8) |
+ (sysinfo->rst_to_cke << 0);
+
+ /* Step 5: Configure DDR physical parameters (density and burst len) */
+ coladdr = lpddr2_cfg->coladdr;
+ if (lpddr2_cfg->coladdr == 8) /* 8-bit COL is 0x3 */
+ coladdr += 4;
+ else if (lpddr2_cfg->coladdr == 12) /* 12-bit COL is 0x4 */
+ coladdr += 1;
+ mmdc0->mdctl = (lpddr2_cfg->rowaddr - 11) << 24 | /* ROW */
+ (coladdr - 9) << 20 | /* COL */
+ (0 << 19) | /* Burst Length = 4 for LPDDR2 */
+ (sysinfo->dsize << 16); /* DDR data bus size */
+
+ /* Step 6: Perform ZQ calibration */
+ val = 0xa1390003; /* one-time HW ZQ calib */
+ mmdc0->mpzqhwctrl = val;
+
+ /* Step 7: Enable MMDC with desired chip select */
+ mmdc0->mdctl |= (1 << 31) | /* SDE_0 for CS0 */
+ ((sysinfo->ncs == 2) ? 1 : 0) << 30; /* SDE_1 for CS1 */
+
+ /* Step 8: Write Mode Registers to Init LPDDR2 devices */
+ for (cs = 0; cs < sysinfo->ncs; cs++) {
+ /* MR63: reset */
+ mmdc0->mdscr = MR(63, 0, 3, cs);
+ /* MR10: calibration,
+ * 0xff is calibration command after intilization.
+ */
+ val = 0xA | (0xff << 8);
+ mmdc0->mdscr = MR(val, 0, 3, cs);
+ /* MR1 */
+ val = 0x1 | (0x82 << 8);
+ mmdc0->mdscr = MR(val, 0, 3, cs);
+ /* MR2 */
+ val = 0x2 | (0x04 << 8);
+ mmdc0->mdscr = MR(val, 0, 3, cs);
+ /* MR3 */
+ val = 0x3 | (0x02 << 8);
+ mmdc0->mdscr = MR(val, 0, 3, cs);
+ }
+
+ /* Step 10: Power down control and self-refresh */
+ mmdc0->mdpdc = (tcke & 0x7) << 16 |
+ 5 << 12 | /* PWDT_1: 256 cycles */
+ 5 << 8 | /* PWDT_0: 256 cycles */
+ 1 << 6 | /* BOTH_CS_PD */
+ (tcksrx & 0x7) << 3 |
+ (tcksre & 0x7);
+ mmdc0->mapsr = 0x00001006; /* ADOPT power down enabled */
+
+ /* Step 11: Configure ZQ calibration: one-time and periodic 1ms */
+ val = 0xa1310003;
+ mmdc0->mpzqhwctrl = val;
+
+ /* Step 12: Configure and activate periodic refresh */
+ mmdc0->mdref = (sysinfo->refsel << 14) | (sysinfo->refr << 11);
+
+ /* Step 13: Deassert config request - init complete */
+ mmdc0->mdscr = 0x00000000;
+
+ /* wait for auto-ZQ calibration to complete */
+ mdelay(1);
+}
+
+void mx6_ddr3_cfg(const struct mx6_ddr_sysinfo *sysinfo,
const struct mx6_mmdc_calibration *calib,
const struct mx6_ddr3_cfg *ddr3_cfg)
{
volatile struct mmdc_p_regs *mmdc0;
-#ifndef CONFIG_MX6SX
volatile struct mmdc_p_regs *mmdc1;
-#endif
u32 val;
u8 tcke, tcksrx, tcksre, txpdll, taofpd, taonpd, trrd;
u8 todtlon, taxpd, tanpd, tcwl, txp, tfaw, tcl;
u16 tdllk = 0x1ff; /* DLL locking time: 512 cycles (JEDEC DDR3) */
u8 coladdr;
int clkper; /* clock period in picoseconds */
- int clock; /* clock freq in mHz */
+ int clock; /* clock freq in MHz */
int cs;
+ u16 mem_speed = ddr3_cfg->mem_speed;
mmdc0 = (struct mmdc_p_regs *)MMDC_P0_BASE_ADDR;
-#ifndef CONFIG_MX6SX
- mmdc1 = (struct mmdc_p_regs *)MMDC_P1_BASE_ADDR;
-#endif
+ if (!is_mx6sx() && !is_mx6ul() && !is_mx6sl())
+ mmdc1 = (struct mmdc_p_regs *)MMDC_P1_BASE_ADDR;
+
+ /* Limit mem_speed for MX6D/MX6Q */
+ if (is_mx6dq() || is_mx6dqp()) {
+ if (mem_speed > 1066)
+ mem_speed = 1066; /* 1066 MT/s */
- /* MX6D/MX6Q: 1066 MHz memory clock, clkper = 1.894ns = 1894ps */
- if (is_cpu_type(MXC_CPU_MX6Q) || is_cpu_type(MXC_CPU_MX6D)) {
- clock = 528;
tcwl = 4;
}
- /* MX6S/MX6DL: 800 MHz memory clock, clkper = 2.5ns = 2500ps */
+ /* Limit mem_speed for MX6S/MX6DL */
else {
- clock = 400;
+ if (mem_speed > 800)
+ mem_speed = 800; /* 800 MT/s */
+
tcwl = 3;
}
+
+ clock = mem_speed / 2;
+ /*
+ * Data rate of 1066 MT/s requires 533 MHz DDR3 clock, but MX6D/Q supports
+ * up to 528 MHz, so reduce the clock to fit chip specs
+ */
+ if (is_mx6dq() || is_mx6dqp()) {
+ if (clock > 528)
+ clock = 528; /* 528 MHz */
+ }
+
clkper = (1000 * 1000) / clock; /* pico seconds */
todtlon = tcwl;
taxpd = tcwl;
}
txpr = txs;
- switch (ddr3_cfg->mem_speed) {
+ switch (mem_speed) {
case 800:
txp = DIV_ROUND_UP(max(3 * clkper, 7500), clkper) - 1;
tcke = DIV_ROUND_UP(max(3 * clkper, 7500), clkper) - 1;
trrd = DIV_ROUND_UP(max(4 * clkper, 10000), clkper) - 1;
}
break;
- case 1333:
- txp = DIV_ROUND_UP(max(3 * clkper, 6000), clkper) - 1;
- tcke = DIV_ROUND_UP(max(3 * clkper, 5625), clkper) - 1;
- if (ddr3_cfg->pagesz == 1) {
- tfaw = DIV_ROUND_UP(30000, clkper) - 1;
- trrd = DIV_ROUND_UP(max(4 * clkper, 6000), clkper) - 1;
- } else {
- tfaw = DIV_ROUND_UP(45000, clkper) - 1;
- trrd = DIV_ROUND_UP(max(4 * clkper, 7500), clkper) - 1;
- }
- break;
- case 1600:
- txp = DIV_ROUND_UP(max(3 * clkper, 6000), clkper) - 1;
- tcke = DIV_ROUND_UP(max(3 * clkper, 5000), clkper) - 1;
- if (ddr3_cfg->pagesz == 1) {
- tfaw = DIV_ROUND_UP(30000, clkper) - 1;
- trrd = DIV_ROUND_UP(max(4 * clkper, 6000), clkper) - 1;
- } else {
- tfaw = DIV_ROUND_UP(40000, clkper) - 1;
- trrd = DIV_ROUND_UP(max(4 * clkper, 7500), clkper) - 1;
- }
- break;
default:
puts("invalid memory speed\n");
hang();
debug("density:%d Gb (%d Gb per chip)\n",
sysinfo->cs_density, ddr3_cfg->density);
debug("clock: %dMHz (%d ps)\n", clock, clkper);
- debug("memspd:%d\n", ddr3_cfg->mem_speed);
+ debug("memspd:%d\n", mem_speed);
debug("tcke=%d\n", tcke);
debug("tcksrx=%d\n", tcksrx);
debug("tcksre=%d\n", tcksre);
debug("Rtt_wr=%d\n", sysinfo->rtt_wr);
debug("Rtt_nom=%d\n", sysinfo->rtt_nom);
debug("SRT=%d\n", ddr3_cfg->SRT);
- debug("tcl=%d\n", tcl);
debug("twr=%d\n", twr);
/*
/* MR2 */
val = (sysinfo->rtt_wr & 3) << 9 | (ddr3_cfg->SRT & 1) << 7 |
((tcwl - 3) & 3) << 3;
+ debug("MR2 CS%d: 0x%08x\n", cs, (u32)MR(val, 2, 3, cs));
mmdc0->mdscr = MR(val, 2, 3, cs);
/* MR3 */
+ debug("MR3 CS%d: 0x%08x\n", cs, (u32)MR(0, 3, 3, cs));
mmdc0->mdscr = MR(0, 3, 3, cs);
/* MR1 */
val = ((sysinfo->rtt_nom & 1) ? 1 : 0) << 2 |
((sysinfo->rtt_nom & 2) ? 1 : 0) << 6;
+ debug("MR1 CS%d: 0x%08x\n", cs, (u32)MR(val, 1, 3, cs));
mmdc0->mdscr = MR(val, 1, 3, cs);
/* MR0 */
val = ((tcl - 1) << 4) | /* CAS */
(1 << 8) | /* DLL Reset */
- ((twr - 3) << 9); /* Write Recovery */
+ ((twr - 3) << 9) | /* Write Recovery */
+ (sysinfo->pd_fast_exit << 12); /* Precharge PD PLL on */
+ debug("MR0 CS%d: 0x%08x\n", cs, (u32)MR(val, 0, 3, cs));
mmdc0->mdscr = MR(val, 0, 3, cs);
/* ZQ calibration */
val = (1 << 10);
mmdc0->mdpdc = (tcke & 0x7) << 16 |
5 << 12 | /* PWDT_1: 256 cycles */
5 << 8 | /* PWDT_0: 256 cycles */
- 1 << 7 | /* SLOW_PD */
1 << 6 | /* BOTH_CS_PD */
(tcksrx & 0x7) << 3 |
(tcksre & 0x7);
+ if (!sysinfo->pd_fast_exit)
+ mmdc0->mdpdc |= (1 << 7); /* SLOW_PD */
mmdc0->mapsr = 0x00001006; /* ADOPT power down enabled */
/* Step 11: Configure ZQ calibration: one-time and periodic 1ms */
MMDC1(mpzqhwctrl, val);
/* Step 12: Configure and activate periodic refresh */
- mmdc0->mdref = (1 << 14) | /* REF_SEL: Periodic refresh cycle: 32kHz */
- (7 << 11); /* REFR: Refresh Rate - 8 refreshes */
+ mmdc0->mdref = (sysinfo->refsel << 14) | (sysinfo->refr << 11);
/* Step 13: Deassert config request - init complete */
mmdc0->mdscr = 0x00000000;
/* wait for auto-ZQ calibration to complete */
mdelay(1);
}
+
+void mmdc_read_calibration(struct mx6_ddr_sysinfo const *sysinfo,
+ struct mx6_mmdc_calibration *calib)
+{
+ struct mmdc_p_regs *mmdc0 = (struct mmdc_p_regs *)MMDC_P0_BASE_ADDR;
+ struct mmdc_p_regs *mmdc1 = (struct mmdc_p_regs *)MMDC_P1_BASE_ADDR;
+
+ calib->p0_mpwldectrl0 = readl(&mmdc0->mpwldectrl0);
+ calib->p0_mpwldectrl1 = readl(&mmdc0->mpwldectrl1);
+ calib->p0_mpdgctrl0 = readl(&mmdc0->mpdgctrl0);
+ calib->p0_mpdgctrl1 = readl(&mmdc0->mpdgctrl1);
+ calib->p0_mprddlctl = readl(&mmdc0->mprddlctl);
+ calib->p0_mpwrdlctl = readl(&mmdc0->mpwrdlctl);
+
+ if (sysinfo->dsize == 2) {
+ calib->p1_mpwldectrl0 = readl(&mmdc1->mpwldectrl0);
+ calib->p1_mpwldectrl1 = readl(&mmdc1->mpwldectrl1);
+ calib->p1_mpdgctrl0 = readl(&mmdc1->mpdgctrl0);
+ calib->p1_mpdgctrl1 = readl(&mmdc1->mpdgctrl1);
+ calib->p1_mprddlctl = readl(&mmdc1->mprddlctl);
+ calib->p1_mpwrdlctl = readl(&mmdc1->mpwrdlctl);
+ }
+}
+
+void mx6_dram_cfg(const struct mx6_ddr_sysinfo *sysinfo,
+ const struct mx6_mmdc_calibration *calib,
+ const void *ddr_cfg)
+{
+ if (sysinfo->ddr_type == DDR_TYPE_DDR3) {
+ mx6_ddr3_cfg(sysinfo, calib, ddr_cfg);
+ } else if (sysinfo->ddr_type == DDR_TYPE_LPDDR2) {
+ mx6_lpddr2_cfg(sysinfo, calib, ddr_cfg);
+ } else {
+ puts("Unsupported ddr type\n");
+ hang();
+ }
+}
projects / u-boot / blobdiff