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0fed36dd48
Refreshed all patches. Compile-tested on: imx6 Runtime-tested on: imx6 Signed-off-by: Koen Vandeputte <koen.vandeputte@ncentric.com>
91 lines
3.2 KiB
Diff
91 lines
3.2 KiB
Diff
From f3d460fb85677a5f62324771e5715ceb11726ecc Mon Sep 17 00:00:00 2001
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From: Yangbo Lu <yangbo.lu@nxp.com>
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Date: Thu, 12 Dec 2019 15:52:19 +0800
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Subject: [PATCH] LF-605 mmc: sdhci-of-esdhc: update tuning erratum A-008171
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There is an official update for eSDHC tuning erratum A-008171.
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This patch is to implement the changes,
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- Affect all revisions of SoC.
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- Changes for tuning window checking.
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- Hardware hits a new condition that tuning succeeds although
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the eSDHC might not have tuned properly for type2 SoCs
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(soc_tuning_erratum_type2[] array in driver). So check
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tuning window after tuning succeeds.
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Signed-off-by: Yangbo Lu <yangbo.lu@nxp.com>
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Acked-by: Adrian Hunter <adrian.hunter@intel.com>
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---
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drivers/mmc/host/sdhci-of-esdhc.c | 39 ++++++++++++++++++++++++++-------------
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1 file changed, 26 insertions(+), 13 deletions(-)
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--- a/drivers/mmc/host/sdhci-of-esdhc.c
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+++ b/drivers/mmc/host/sdhci-of-esdhc.c
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@@ -889,20 +889,20 @@ static int esdhc_signal_voltage_switch(s
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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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@@ -970,13 +970,13 @@ static void esdhc_prepare_sw_tuning(stru
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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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@@ -1049,6 +1049,19 @@ static int esdhc_execute_tuning(struct m
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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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+
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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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