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LF-605 mmc: sdhci-of-esdhc: update tuning erratum A-008171
There is an official update for eSDHC tuning erratum A-008171. This patch is to implement the changes, - Affect all revisions of SoC. - Changes for tuning window checking. - Hardware hits a new condition that tuning succeeds although the eSDHC might not have tuned properly for type2 SoCs (soc_tuning_erratum_type2[] array in driver). So check tuning window after tuning succeeds. Signed-off-by: Yangbo Lu <yangbo.lu@nxp.com> Acked-by: Adrian Hunter <adrian.hunter@intel.com>
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@ -851,20 +851,20 @@ static int esdhc_signal_voltage_switch(struct mmc_host *mmc,
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}
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static struct soc_device_attribute soc_tuning_erratum_type1[] = {
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{ .family = "QorIQ T1023", .revision = "1.0", },
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{ .family = "QorIQ T1040", .revision = "1.0", },
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{ .family = "QorIQ T2080", .revision = "1.0", },
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{ .family = "QorIQ LS1021A", .revision = "1.0", },
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{ .family = "QorIQ T1023", },
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{ .family = "QorIQ T1040", },
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{ .family = "QorIQ T2080", },
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{ .family = "QorIQ LS1021A", },
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{ },
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};
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static struct soc_device_attribute soc_tuning_erratum_type2[] = {
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{ .family = "QorIQ LS1012A", .revision = "1.0", },
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{ .family = "QorIQ LS1043A", .revision = "1.*", },
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{ .family = "QorIQ LS1046A", .revision = "1.0", },
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{ .family = "QorIQ LS1080A", .revision = "1.0", },
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{ .family = "QorIQ LS2080A", .revision = "1.0", },
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{ .family = "QorIQ LA1575A", .revision = "1.0", },
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{ .family = "QorIQ LS1012A", },
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{ .family = "QorIQ LS1043A", },
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{ .family = "QorIQ LS1046A", },
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{ .family = "QorIQ LS1080A", },
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{ .family = "QorIQ LS2080A", },
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{ .family = "QorIQ LA1575A", },
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{ },
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};
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@ -932,13 +932,13 @@ static void esdhc_prepare_sw_tuning(struct sdhci_host *host, u8 *window_start,
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/* Write 32'hFFFF_FFFF to IRQSTAT register */
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sdhci_writel(host, 0xFFFFFFFF, SDHCI_INT_STATUS);
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/* If TBSTAT[15:8]-TBSTAT[7:0] > 4 * div_ratio
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* or TBSTAT[7:0]-TBSTAT[15:8] > 4 * div_ratio,
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/* If TBSTAT[15:8]-TBSTAT[7:0] > (4 * div_ratio) + 2
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* or TBSTAT[7:0]-TBSTAT[15:8] > (4 * div_ratio) + 2,
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* then program TBPTR[TB_WNDW_END_PTR] = 4 * div_ratio
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* and program TBPTR[TB_WNDW_START_PTR] = 8 * div_ratio.
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*/
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if (abs(start_ptr - end_ptr) > (4 * esdhc->div_ratio)) {
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if (abs(start_ptr - end_ptr) > (4 * esdhc->div_ratio + 2)) {
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*window_start = 8 * esdhc->div_ratio;
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*window_end = 4 * esdhc->div_ratio;
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} else {
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@ -1011,6 +1011,19 @@ static int esdhc_execute_tuning(struct mmc_host *mmc, u32 opcode)
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if (ret)
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break;
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/* For type2 affected platforms of the tuning erratum,
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* tuning may succeed although eSDHC might not have
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* tuned properly. Need to check tuning window.
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*/
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if (esdhc->quirk_tuning_erratum_type2 &&
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!host->tuning_err) {
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esdhc_tuning_window_ptr(host, &window_start,
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&window_end);
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if (abs(window_start - window_end) >
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(4 * esdhc->div_ratio + 2))
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host->tuning_err = -EAGAIN;
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}
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/* If HW tuning fails and triggers erratum,
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* try workaround.
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*/
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