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mx6: ddr: add routine to return DDR calibration data
Add routine mmdc_read_calibration() to return the output of DDR calibration. This can be used for debugging or to aid in construction of static memory configuration. This routine will be used in a subsequent patch set adding a virtual "mx6memcal" board, but could also be useful when gathering statistics during an initial production run. Signed-off-by: Eric Nelson <eric@nelint.com>
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@ -1501,6 +1501,29 @@ void mx6_ddr3_cfg(const struct mx6_ddr_sysinfo *sysinfo,
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mdelay(1);
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mdelay(1);
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}
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}
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void mmdc_read_calibration(struct mx6_ddr_sysinfo const *sysinfo,
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struct mx6_mmdc_calibration *calib)
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{
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struct mmdc_p_regs *mmdc0 = (struct mmdc_p_regs *)MMDC_P0_BASE_ADDR;
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struct mmdc_p_regs *mmdc1 = (struct mmdc_p_regs *)MMDC_P1_BASE_ADDR;
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calib->p0_mpwldectrl0 = readl(&mmdc0->mpwldectrl0);
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calib->p0_mpwldectrl1 = readl(&mmdc0->mpwldectrl1);
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calib->p0_mpdgctrl0 = readl(&mmdc0->mpdgctrl0);
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calib->p0_mpdgctrl1 = readl(&mmdc0->mpdgctrl1);
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calib->p0_mprddlctl = readl(&mmdc0->mprddlctl);
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calib->p0_mpwrdlctl = readl(&mmdc0->mpwrdlctl);
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if (sysinfo->dsize == 2) {
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calib->p1_mpwldectrl0 = readl(&mmdc1->mpwldectrl0);
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calib->p1_mpwldectrl1 = readl(&mmdc1->mpwldectrl1);
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calib->p1_mpdgctrl0 = readl(&mmdc1->mpdgctrl0);
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calib->p1_mpdgctrl1 = readl(&mmdc1->mpdgctrl1);
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calib->p1_mprddlctl = readl(&mmdc1->mprddlctl);
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calib->p1_mpwrdlctl = readl(&mmdc1->mpwrdlctl);
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}
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}
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void mx6_dram_cfg(const struct mx6_ddr_sysinfo *sysinfo,
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void mx6_dram_cfg(const struct mx6_ddr_sysinfo *sysinfo,
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const struct mx6_mmdc_calibration *calib,
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const struct mx6_mmdc_calibration *calib,
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const void *ddr_cfg)
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const void *ddr_cfg)
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@ -461,6 +461,8 @@ void mx6sl_dram_iocfg(unsigned width,
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#if defined(CONFIG_MX6QDL) || defined(CONFIG_MX6Q) || defined(CONFIG_MX6D)
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#if defined(CONFIG_MX6QDL) || defined(CONFIG_MX6Q) || defined(CONFIG_MX6D)
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int mmdc_do_write_level_calibration(struct mx6_ddr_sysinfo const *sysinfo);
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int mmdc_do_write_level_calibration(struct mx6_ddr_sysinfo const *sysinfo);
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int mmdc_do_dqs_calibration(struct mx6_ddr_sysinfo const *sysinfo);
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int mmdc_do_dqs_calibration(struct mx6_ddr_sysinfo const *sysinfo);
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void mmdc_read_calibration(struct mx6_ddr_sysinfo const *sysinfo,
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struct mx6_mmdc_calibration *calib);
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#endif
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#endif
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/* configure mx6 mmdc registers */
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/* configure mx6 mmdc registers */
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