package/kernel/mac80211/patches/rtl/001-20-v6.9-wifi-rtl8xxxu-make-supporting-AP-mode-only-on-port-0.patch

   1 From 69abad618efd17e50bc6f880332ab36b660b0b34 Mon Sep 17 00:00:00 2001
   2 From: Martin Kaistra <martin.kaistra@linutronix.de>
   3 Date: Fri, 22 Dec 2023 11:14:41 +0100
   4 Subject: [PATCH 20/21] wifi: rtl8xxxu: make supporting AP mode only on port 0
   5  transparent
   6
   7 When the driver is used for concurrent mode, both virtual interfaces can
   8 be set to station or AP mode, though only one can be in AP mode at the
   9 same time.
  10
  11 In order to keep the code simple, use only hw port 0 for AP mode. When
  12 an interface is added in AP mode which would be assigned to port 1, use
  13 a switch_port function to transparently swap the mapping between virtual
  14 interface and hw port.
  15
  16 Signed-off-by: Martin Kaistra <martin.kaistra@linutronix.de>
  17 Reviewed-by: Ping-Ke Shih <pkshih@realtek.com>
  18 Signed-off-by: Kalle Valo <kvalo@kernel.org>
  19 Link: https://msgid.link/20231222101442.626837-21-martin.kaistra@linutronix.de
  20 ---
  21  .../wireless/realtek/rtl8xxxu/rtl8xxxu_core.c | 91 ++++++++++++++++++-
  22  1 file changed, 89 insertions(+), 2 deletions(-)
  23
  24 --- a/drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu_core.c
  25 +++ b/drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu_core.c
  26 @@ -6624,6 +6624,91 @@ error:
  27         return ret;
  28  }
  29
  30 +static void rtl8xxxu_switch_ports(struct rtl8xxxu_priv *priv)
  31 +{
  32 +       u8 macid[ETH_ALEN], bssid[ETH_ALEN], macid_1[ETH_ALEN], bssid_1[ETH_ALEN];
  33 +       u8 msr, bcn_ctrl, bcn_ctrl_1, atimwnd[2], atimwnd_1[2];
  34 +       struct rtl8xxxu_vif *rtlvif;
  35 +       struct ieee80211_vif *vif;
  36 +       u8 tsftr[8], tsftr_1[8];
  37 +       int i;
  38 +
  39 +       msr = rtl8xxxu_read8(priv, REG_MSR);
  40 +       bcn_ctrl = rtl8xxxu_read8(priv, REG_BEACON_CTRL);
  41 +       bcn_ctrl_1 = rtl8xxxu_read8(priv, REG_BEACON_CTRL_1);
  42 +
  43 +       for (i = 0; i < ARRAY_SIZE(atimwnd); i++)
  44 +               atimwnd[i] = rtl8xxxu_read8(priv, REG_ATIMWND + i);
  45 +       for (i = 0; i < ARRAY_SIZE(atimwnd_1); i++)
  46 +               atimwnd_1[i] = rtl8xxxu_read8(priv, REG_ATIMWND_1 + i);
  47 +
  48 +       for (i = 0; i < ARRAY_SIZE(tsftr); i++)
  49 +               tsftr[i] = rtl8xxxu_read8(priv, REG_TSFTR + i);
  50 +       for (i = 0; i < ARRAY_SIZE(tsftr); i++)
  51 +               tsftr_1[i] = rtl8xxxu_read8(priv, REG_TSFTR1 + i);
  52 +
  53 +       for (i = 0; i < ARRAY_SIZE(macid); i++)
  54 +               macid[i] = rtl8xxxu_read8(priv, REG_MACID + i);
  55 +
  56 +       for (i = 0; i < ARRAY_SIZE(bssid); i++)
  57 +               bssid[i] = rtl8xxxu_read8(priv, REG_BSSID + i);
  58 +
  59 +       for (i = 0; i < ARRAY_SIZE(macid_1); i++)
  60 +               macid_1[i] = rtl8xxxu_read8(priv, REG_MACID1 + i);
  61 +
  62 +       for (i = 0; i < ARRAY_SIZE(bssid_1); i++)
  63 +               bssid_1[i] = rtl8xxxu_read8(priv, REG_BSSID1 + i);
  64 +
  65 +       /* disable bcn function, disable update TSF */
  66 +       rtl8xxxu_write8(priv, REG_BEACON_CTRL, (bcn_ctrl &
  67 +                       (~BEACON_FUNCTION_ENABLE)) | BEACON_DISABLE_TSF_UPDATE);
  68 +       rtl8xxxu_write8(priv, REG_BEACON_CTRL_1, (bcn_ctrl_1 &
  69 +                       (~BEACON_FUNCTION_ENABLE)) | BEACON_DISABLE_TSF_UPDATE);
  70 +
  71 +       /* switch msr */
  72 +       msr = (msr & 0xf0) | ((msr & 0x03) << 2) | ((msr & 0x0c) >> 2);
  73 +       rtl8xxxu_write8(priv, REG_MSR, msr);
  74 +
  75 +       /* write port0 */
  76 +       rtl8xxxu_write8(priv, REG_BEACON_CTRL, bcn_ctrl_1 & ~BEACON_FUNCTION_ENABLE);
  77 +       for (i = 0; i < ARRAY_SIZE(atimwnd_1); i++)
  78 +               rtl8xxxu_write8(priv, REG_ATIMWND + i, atimwnd_1[i]);
  79 +       for (i = 0; i < ARRAY_SIZE(tsftr_1); i++)
  80 +               rtl8xxxu_write8(priv, REG_TSFTR + i, tsftr_1[i]);
  81 +       for (i = 0; i < ARRAY_SIZE(macid_1); i++)
  82 +               rtl8xxxu_write8(priv, REG_MACID + i, macid_1[i]);
  83 +       for (i = 0; i < ARRAY_SIZE(bssid_1); i++)
  84 +               rtl8xxxu_write8(priv, REG_BSSID + i, bssid_1[i]);
  85 +
  86 +       /* write port1 */
  87 +       rtl8xxxu_write8(priv, REG_BEACON_CTRL_1, bcn_ctrl & ~BEACON_FUNCTION_ENABLE);
  88 +       for (i = 0; i < ARRAY_SIZE(atimwnd); i++)
  89 +               rtl8xxxu_write8(priv, REG_ATIMWND_1 + i, atimwnd[i]);
  90 +       for (i = 0; i < ARRAY_SIZE(tsftr); i++)
  91 +               rtl8xxxu_write8(priv, REG_TSFTR1 + i, tsftr[i]);
  92 +       for (i = 0; i < ARRAY_SIZE(macid); i++)
  93 +               rtl8xxxu_write8(priv, REG_MACID1 + i, macid[i]);
  94 +       for (i = 0; i < ARRAY_SIZE(bssid); i++)
  95 +               rtl8xxxu_write8(priv, REG_BSSID1 + i, bssid[i]);
  96 +
  97 +       /* write bcn ctl */
  98 +       rtl8xxxu_write8(priv, REG_BEACON_CTRL, bcn_ctrl_1);
  99 +       rtl8xxxu_write8(priv, REG_BEACON_CTRL_1, bcn_ctrl);
 100 +
 101 +       vif = priv->vifs[0];
 102 +       priv->vifs[0] = priv->vifs[1];
 103 +       priv->vifs[1] = vif;
 104 +
 105 +       /* priv->vifs[0] is NULL here, based on how this function is currently
 106 +        * called from rtl8xxxu_add_interface().
 107 +        * When this function will be used in the future for a different
 108 +        * scenario, please check whether vifs[0] or vifs[1] can be NULL and if
 109 +        * necessary add code to set port_num = 1.
 110 +        */
 111 +       rtlvif = (struct rtl8xxxu_vif *)priv->vifs[1]->drv_priv;
 112 +       rtlvif->port_num = 1;
 113 +}
 114 +
 115  static int rtl8xxxu_add_interface(struct ieee80211_hw *hw,
 116                                   struct ieee80211_vif *vif)
 117  {
 118 @@ -6651,8 +6736,10 @@ static int rtl8xxxu_add_interface(struct
 119                 }
 120                 break;
 121         case NL80211_IFTYPE_AP:
 122 -               if (port_num == 1)
 123 -                       return -EOPNOTSUPP;
 124 +               if (port_num == 1) {
 125 +                       rtl8xxxu_switch_ports(priv);
 126 +                       port_num = 0;
 127 +               }
 128
 129                 rtl8xxxu_write8(priv, REG_BEACON_CTRL,
 130                                 BEACON_DISABLE_TSF_UPDATE | BEACON_CTRL_MBSSID);