diff options
Diffstat (limited to 'target/linux/layerscape/patches-5.4/816-sdhc-0002-LF-605-mmc-sdhci-of-esdhc-convert-to-use-esdhc_tunin.patch')
| -rw-r--r-- | target/linux/layerscape/patches-5.4/816-sdhc-0002-LF-605-mmc-sdhci-of-esdhc-convert-to-use-esdhc_tunin.patch | 77 |
1 files changed, 77 insertions, 0 deletions
diff --git a/target/linux/layerscape/patches-5.4/816-sdhc-0002-LF-605-mmc-sdhci-of-esdhc-convert-to-use-esdhc_tunin.patch b/target/linux/layerscape/patches-5.4/816-sdhc-0002-LF-605-mmc-sdhci-of-esdhc-convert-to-use-esdhc_tunin.patch new file mode 100644 index 0000000000..74dd63d8e5 --- /dev/null +++ b/target/linux/layerscape/patches-5.4/816-sdhc-0002-LF-605-mmc-sdhci-of-esdhc-convert-to-use-esdhc_tunin.patch @@ -0,0 +1,77 @@ +From e95c04bd6d9ebe081126184fb228461b1b3fa7aa Mon Sep 17 00:00:00 2001 +From: Yangbo Lu <yangbo.lu@nxp.com> +Date: Thu, 12 Dec 2019 15:52:18 +0800 +Subject: [PATCH] LF-605 mmc: sdhci-of-esdhc: convert to use + esdhc_tuning_window_ptr() + +Convert to use a new function esdhc_tuning_window_ptr() to +get tuning window start point and end point. + +Signed-off-by: Yangbo Lu <yangbo.lu@nxp.com> +Acked-by: Adrian Hunter <adrian.hunter@intel.com> +--- + drivers/mmc/host/sdhci-of-esdhc.c | 34 +++++++++++++++++++++------------- + 1 file changed, 21 insertions(+), 13 deletions(-) + +--- a/drivers/mmc/host/sdhci-of-esdhc.c ++++ b/drivers/mmc/host/sdhci-of-esdhc.c +@@ -888,20 +888,11 @@ static void esdhc_tuning_block_enable(st + esdhc_clock_enable(host, true); + } + +-static void esdhc_prepare_sw_tuning(struct sdhci_host *host, u8 *window_start, ++static void esdhc_tuning_window_ptr(struct sdhci_host *host, u8 *window_start, + u8 *window_end) + { +- struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); +- struct sdhci_esdhc *esdhc = sdhci_pltfm_priv(pltfm_host); +- u8 tbstat_15_8, tbstat_7_0; + u32 val; + +- if (esdhc->quirk_tuning_erratum_type1) { +- *window_start = 5 * esdhc->div_ratio; +- *window_end = 3 * esdhc->div_ratio; +- return; +- } +- + /* Write TBCTL[11:8]=4'h8 */ + val = sdhci_readl(host, ESDHC_TBCTL); + val &= ~(0xf << 8); +@@ -920,6 +911,25 @@ static void esdhc_prepare_sw_tuning(stru + val = sdhci_readl(host, ESDHC_TBSTAT); + val = sdhci_readl(host, ESDHC_TBSTAT); + ++ *window_end = val & 0xff; ++ *window_start = (val >> 8) & 0xff; ++} ++ ++static void esdhc_prepare_sw_tuning(struct sdhci_host *host, u8 *window_start, ++ u8 *window_end) ++{ ++ struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); ++ struct sdhci_esdhc *esdhc = sdhci_pltfm_priv(pltfm_host); ++ u8 start_ptr, end_ptr; ++ ++ if (esdhc->quirk_tuning_erratum_type1) { ++ *window_start = 5 * esdhc->div_ratio; ++ *window_end = 3 * esdhc->div_ratio; ++ return; ++ } ++ ++ esdhc_tuning_window_ptr(host, &start_ptr, &end_ptr); ++ + /* Reset data lines by setting ESDHCCTL[RSTD] */ + sdhci_reset(host, SDHCI_RESET_DATA); + /* Write 32'hFFFF_FFFF to IRQSTAT register */ +@@ -930,10 +940,8 @@ static void esdhc_prepare_sw_tuning(stru + * then program TBPTR[TB_WNDW_END_PTR] = 4 * div_ratio + * and program TBPTR[TB_WNDW_START_PTR] = 8 * div_ratio. + */ +- tbstat_7_0 = val & 0xff; +- tbstat_15_8 = (val >> 8) & 0xff; + +- if (abs(tbstat_15_8 - tbstat_7_0) > (4 * esdhc->div_ratio)) { ++ if (abs(start_ptr - end_ptr) > (4 * esdhc->div_ratio)) { + *window_start = 8 * esdhc->div_ratio; + *window_end = 4 * esdhc->div_ratio; + } else { |