package/kernel/mac80211/patches/653-0047-rtl8xxxu-Implement-rtl8188eu_active_to_emu.patch

   1 From b3edeceb7c8c3b0eb70b26e3237afa5086afe8ed Mon Sep 17 00:00:00 2001
   2 From: Jes Sorensen <Jes.Sorensen@redhat.com>
   3 Date: Fri, 26 Aug 2016 15:16:32 -0400
   4 Subject: [PATCH] rtl8xxxu: Implement rtl8188eu_active_to_emu()
   5
   6 Per the vendor driver's sequence table, this seems to be the correct
   7 way to disable RF on the 8188eu, even if the driver doesn't actually
   8 call the sequence by itself.
   9
  10 Signed-off-by: Jes Sorensen <Jes.Sorensen@redhat.com>
  11 ---
  12  .../net/wireless/realtek/rtl8xxxu/rtl8xxxu_8188e.c | 38 ++++++++++++++++++++++
  13  1 file changed, 38 insertions(+)
  14
  15 --- a/drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu_8188e.c
  16 +++ b/drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu_8188e.c
  17 @@ -1155,6 +1155,42 @@ exit:
  18         return ret;
  19  }
  20
  21 +static int rtl8188eu_active_to_emu(struct rtl8xxxu_priv *priv)
  22 +{
  23 +       u8 val8;
  24 +       int count, ret = 0;
  25 +
  26 +       /* Turn off RF */
  27 +       rtl8xxxu_write8(priv, REG_RF_CTRL, 0);
  28 +
  29 +       /* LDO Sleep mode */
  30 +       val8 = rtl8xxxu_read8(priv, REG_LPLDO_CTRL);
  31 +       val8 |= BIT(4);
  32 +       rtl8xxxu_write8(priv, REG_LPLDO_CTRL, val8);
  33 +
  34 +       /* 0x0005[1] = 1 turn off MAC by HW state machine*/
  35 +       val8 = rtl8xxxu_read8(priv, REG_APS_FSMCO + 1);
  36 +       val8 |= BIT(1);
  37 +       rtl8xxxu_write8(priv, REG_APS_FSMCO + 1, val8);
  38 +
  39 +       for (count = RTL8XXXU_MAX_REG_POLL; count; count--) {
  40 +               val8 = rtl8xxxu_read8(priv, REG_APS_FSMCO + 1);
  41 +               if ((val8 & BIT(1)) == 0)
  42 +                       break;
  43 +               udelay(10);
  44 +       }
  45 +
  46 +       if (!count) {
  47 +               dev_warn(&priv->udev->dev, "%s: Disabling MAC timed out\n",
  48 +                        __func__);
  49 +               ret = -EBUSY;
  50 +               goto exit;
  51 +       }
  52 +
  53 +exit:
  54 +       return ret;
  55 +}
  56 +
  57  static int rtl8188eu_power_on(struct rtl8xxxu_priv *priv)
  58  {
  59         u16 val16;
  60 @@ -1202,6 +1238,8 @@ static void rtl8188e_disable_rf(struct r
  61         rtl8xxxu_write_rfreg(priv, RF_A, RF6052_REG_AC, 0);
  62         if (priv->rf_paths == 2)
  63                 rtl8xxxu_write_rfreg(priv, RF_B, RF6052_REG_AC, 0);
  64 +
  65 +       rtl8188eu_active_to_emu(priv);
  66  }
  67
  68  static void rtl8188e_usb_quirks(struct rtl8xxxu_priv *priv)