target/linux/layerscape/patches-5.4/816-sdhc-0002-LF-605-mmc-sdhci-of-esdhc-convert-to-use-esdhc_tunin.patch

   1 From e95c04bd6d9ebe081126184fb228461b1b3fa7aa Mon Sep 17 00:00:00 2001
   2 From: Yangbo Lu <yangbo.lu@nxp.com>
   3 Date: Thu, 12 Dec 2019 15:52:18 +0800
   4 Subject: [PATCH] LF-605 mmc: sdhci-of-esdhc: convert to use
   5  esdhc_tuning_window_ptr()
   6
   7 Convert to use a new function esdhc_tuning_window_ptr() to
   8 get tuning window start point and end point.
   9
  10 Signed-off-by: Yangbo Lu <yangbo.lu@nxp.com>
  11 Acked-by: Adrian Hunter <adrian.hunter@intel.com>
  12 ---
  13  drivers/mmc/host/sdhci-of-esdhc.c | 34 +++++++++++++++++++++-------------
  14  1 file changed, 21 insertions(+), 13 deletions(-)
  15
  16 --- a/drivers/mmc/host/sdhci-of-esdhc.c
  17 +++ b/drivers/mmc/host/sdhci-of-esdhc.c
  18 @@ -888,20 +888,11 @@ static void esdhc_tuning_block_enable(st
  19         esdhc_clock_enable(host, true);
  20  }
  21
  22 -static void esdhc_prepare_sw_tuning(struct sdhci_host *host, u8 *window_start,
  23 +static void esdhc_tuning_window_ptr(struct sdhci_host *host, u8 *window_start,
  24                                     u8 *window_end)
  25  {
  26 -       struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
  27 -       struct sdhci_esdhc *esdhc = sdhci_pltfm_priv(pltfm_host);
  28 -       u8 tbstat_15_8, tbstat_7_0;
  29         u32 val;
  30
  31 -       if (esdhc->quirk_tuning_erratum_type1) {
  32 -               *window_start = 5 * esdhc->div_ratio;
  33 -               *window_end = 3 * esdhc->div_ratio;
  34 -               return;
  35 -       }
  36 -
  37         /* Write TBCTL[11:8]=4'h8 */
  38         val = sdhci_readl(host, ESDHC_TBCTL);
  39         val &= ~(0xf << 8);
  40 @@ -920,6 +911,25 @@ static void esdhc_prepare_sw_tuning(stru
  41         val = sdhci_readl(host, ESDHC_TBSTAT);
  42         val = sdhci_readl(host, ESDHC_TBSTAT);
  43
  44 +       *window_end = val & 0xff;
  45 +       *window_start = (val >> 8) & 0xff;
  46 +}
  47 +
  48 +static void esdhc_prepare_sw_tuning(struct sdhci_host *host, u8 *window_start,
  49 +                                   u8 *window_end)
  50 +{
  51 +       struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
  52 +       struct sdhci_esdhc *esdhc = sdhci_pltfm_priv(pltfm_host);
  53 +       u8 start_ptr, end_ptr;
  54 +
  55 +       if (esdhc->quirk_tuning_erratum_type1) {
  56 +               *window_start = 5 * esdhc->div_ratio;
  57 +               *window_end = 3 * esdhc->div_ratio;
  58 +               return;
  59 +       }
  60 +
  61 +       esdhc_tuning_window_ptr(host, &start_ptr, &end_ptr);
  62 +
  63         /* Reset data lines by setting ESDHCCTL[RSTD] */
  64         sdhci_reset(host, SDHCI_RESET_DATA);
  65         /* Write 32'hFFFF_FFFF to IRQSTAT register */
  66 @@ -930,10 +940,8 @@ static void esdhc_prepare_sw_tuning(stru
  67          * then program TBPTR[TB_WNDW_END_PTR] = 4 * div_ratio
  68          * and program TBPTR[TB_WNDW_START_PTR] = 8 * div_ratio.
  69          */
  70 -       tbstat_7_0 = val & 0xff;
  71 -       tbstat_15_8 = (val >> 8) & 0xff;
  72
  73 -       if (abs(tbstat_15_8 - tbstat_7_0) > (4 * esdhc->div_ratio)) {
  74 +       if (abs(start_ptr - end_ptr) > (4 * esdhc->div_ratio)) {
  75                 *window_start = 8 * esdhc->div_ratio;
  76                 *window_end = 4 * esdhc->div_ratio;
  77         } else {