diff options
Diffstat (limited to 'target/linux/layerscape/patches-5.4/816-sdhc-0003-LF-605-mmc-sdhci-of-esdhc-update-tuning-erratum-A-00.patch')
| -rw-r--r-- | target/linux/layerscape/patches-5.4/816-sdhc-0003-LF-605-mmc-sdhci-of-esdhc-update-tuning-erratum-A-00.patch | 90 |
1 files changed, 90 insertions, 0 deletions
diff --git a/target/linux/layerscape/patches-5.4/816-sdhc-0003-LF-605-mmc-sdhci-of-esdhc-update-tuning-erratum-A-00.patch b/target/linux/layerscape/patches-5.4/816-sdhc-0003-LF-605-mmc-sdhci-of-esdhc-update-tuning-erratum-A-00.patch new file mode 100644 index 0000000000..a391616cfb --- /dev/null +++ b/target/linux/layerscape/patches-5.4/816-sdhc-0003-LF-605-mmc-sdhci-of-esdhc-update-tuning-erratum-A-00.patch @@ -0,0 +1,90 @@ +From f3d460fb85677a5f62324771e5715ceb11726ecc Mon Sep 17 00:00:00 2001 +From: Yangbo Lu <yangbo.lu@nxp.com> +Date: Thu, 12 Dec 2019 15:52:19 +0800 +Subject: [PATCH] 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> +--- + drivers/mmc/host/sdhci-of-esdhc.c | 39 ++++++++++++++++++++++++++------------- + 1 file changed, 26 insertions(+), 13 deletions(-) + +--- a/drivers/mmc/host/sdhci-of-esdhc.c ++++ b/drivers/mmc/host/sdhci-of-esdhc.c +@@ -854,20 +854,20 @@ static int esdhc_signal_voltage_switch(s + } + + static struct soc_device_attribute soc_tuning_erratum_type1[] = { +- { .family = "QorIQ T1023", .revision = "1.0", }, +- { .family = "QorIQ T1040", .revision = "1.0", }, +- { .family = "QorIQ T2080", .revision = "1.0", }, +- { .family = "QorIQ LS1021A", .revision = "1.0", }, ++ { .family = "QorIQ T1023", }, ++ { .family = "QorIQ T1040", }, ++ { .family = "QorIQ T2080", }, ++ { .family = "QorIQ LS1021A", }, + { }, + }; + + static struct soc_device_attribute soc_tuning_erratum_type2[] = { +- { .family = "QorIQ LS1012A", .revision = "1.0", }, +- { .family = "QorIQ LS1043A", .revision = "1.*", }, +- { .family = "QorIQ LS1046A", .revision = "1.0", }, +- { .family = "QorIQ LS1080A", .revision = "1.0", }, +- { .family = "QorIQ LS2080A", .revision = "1.0", }, +- { .family = "QorIQ LA1575A", .revision = "1.0", }, ++ { .family = "QorIQ LS1012A", }, ++ { .family = "QorIQ LS1043A", }, ++ { .family = "QorIQ LS1046A", }, ++ { .family = "QorIQ LS1080A", }, ++ { .family = "QorIQ LS2080A", }, ++ { .family = "QorIQ LA1575A", }, + { }, + }; + +@@ -935,13 +935,13 @@ static void esdhc_prepare_sw_tuning(stru + /* Write 32'hFFFF_FFFF to IRQSTAT register */ + sdhci_writel(host, 0xFFFFFFFF, SDHCI_INT_STATUS); + +- /* If TBSTAT[15:8]-TBSTAT[7:0] > 4 * div_ratio +- * or TBSTAT[7:0]-TBSTAT[15:8] > 4 * div_ratio, ++ /* If TBSTAT[15:8]-TBSTAT[7:0] > (4 * div_ratio) + 2 ++ * or TBSTAT[7:0]-TBSTAT[15:8] > (4 * div_ratio) + 2, + * then program TBPTR[TB_WNDW_END_PTR] = 4 * div_ratio + * and program TBPTR[TB_WNDW_START_PTR] = 8 * div_ratio. + */ + +- if (abs(start_ptr - end_ptr) > (4 * esdhc->div_ratio)) { ++ if (abs(start_ptr - end_ptr) > (4 * esdhc->div_ratio + 2)) { + *window_start = 8 * esdhc->div_ratio; + *window_end = 4 * esdhc->div_ratio; + } else { +@@ -1014,6 +1014,19 @@ static int esdhc_execute_tuning(struct m + if (ret) + break; + ++ /* For type2 affected platforms of the tuning erratum, ++ * tuning may succeed although eSDHC might not have ++ * tuned properly. Need to check tuning window. ++ */ ++ if (esdhc->quirk_tuning_erratum_type2 && ++ !host->tuning_err) { ++ esdhc_tuning_window_ptr(host, &window_start, ++ &window_end); ++ if (abs(window_start - window_end) > ++ (4 * esdhc->div_ratio + 2)) ++ host->tuning_err = -EAGAIN; ++ } ++ + /* If HW tuning fails and triggers erratum, + * try workaround. + */ |