package/kernel/mac80211/patches/rt2x00/984-rt2x00-add-RXDCOC-calibration.patch

   1 From 865823b63f608ac024d326a465ba8fc1a28868cd Mon Sep 17 00:00:00 2001
   2 From: Daniel Golle <daniel@makrotopia.org>
   3 Date: Mon, 8 Jan 2018 13:43:37 +0100
   4 Subject: [PATCH 06/16] rt2x00: add RXDCOC calibration for MT7620
   5 MIME-Version: 1.0
   6 Content-Type: text/plain; charset=UTF-8
   7 Content-Transfer-Encoding: 8bit
   8 To: linux-wireless@vger.kernel.org,
   9     Stanislaw Gruszka <stf_xl@wp.pl>,
  10     Helmut Schaa <helmut.schaa@googlemail.com>
  11 Cc: Kalle Valo <kvalo@kernel.org>,
  12     David S. Miller <davem@davemloft.net>,
  13     Eric Dumazet <edumazet@google.com>,
  14     Jakub Kicinski <kuba@kernel.org>,
  15     Paolo Abeni <pabeni@redhat.com>,
  16     Johannes Berg <johannes.berg@intel.com>
  17
  18 From: Tomislav Požega <pozega.tomislav@gmail.com>
  19
  20 Add RXDCOC calibration code from mtk driver.
  21
  22 Signed-off-by: Daniel Golle <daniel@makrotopia.org>
  23 [fixed typo reported by Serge Vasilugin <vasilugin@yandex.ru>]
  24 Signed-off-by: Tomislav Požega <pozega.tomislav@gmail.com>
  25 ---
  26  .../net/wireless/ralink/rt2x00/rt2800lib.c    | 65 +++++++++++++++++++
  27  1 file changed, 65 insertions(+)
  28
  29 --- a/drivers/net/wireless/ralink/rt2x00/rt2800lib.c
  30 +++ b/drivers/net/wireless/ralink/rt2x00/rt2800lib.c
  31 @@ -8632,6 +8632,70 @@ static void rt2800_r_calibration(struct
  32         rt2800_register_write(rt2x00dev, PWR_PIN_CFG, MAC_PWR_PIN_CFG);
  33  }
  34
  35 +static void rt2800_rxdcoc_calibration(struct rt2x00_dev *rt2x00dev)
  36 +{
  37 +       u8 bbpreg = 0;
  38 +       u32 macvalue = 0, macvalue1 = 0;
  39 +       u8 saverfb0r2, saverfb5r4, saverfb7r4, rfvalue;
  40 +       int i;
  41 +
  42 +       saverfb0r2 = rt2800_rfcsr_read_bank(rt2x00dev, 0, 2);
  43 +       rfvalue = saverfb0r2;
  44 +       rfvalue |= 0x03;
  45 +       rt2800_rfcsr_write_bank(rt2x00dev, 0, 2, rfvalue);
  46 +
  47 +       rt2800_bbp_write(rt2x00dev, 158, 141);
  48 +       bbpreg = rt2800_bbp_read(rt2x00dev, 159);
  49 +       bbpreg |= 0x10;
  50 +       rt2800_bbp_write(rt2x00dev, 159, bbpreg);
  51 +
  52 +       macvalue = rt2800_register_read(rt2x00dev, MAC_SYS_CTRL);
  53 +       rt2800_register_write(rt2x00dev, MAC_SYS_CTRL, 0x8);
  54 +
  55 +       for (i = 0; i < 10000; i++) {
  56 +               macvalue1 = rt2800_register_read(rt2x00dev, MAC_STATUS_CFG);
  57 +               if (macvalue1 & 0x1)
  58 +                       usleep_range(50, 100);
  59 +               else
  60 +                       break;
  61 +       }
  62 +
  63 +       saverfb5r4 = rt2800_rfcsr_read_bank(rt2x00dev, 5, 4);
  64 +       saverfb7r4 = rt2800_rfcsr_read_bank(rt2x00dev, 7, 4);
  65 +       saverfb5r4 = saverfb5r4 & (~0x40);
  66 +       saverfb7r4 = saverfb7r4 & (~0x40);
  67 +       rt2800_rfcsr_write_dccal(rt2x00dev, 4, 0x64);
  68 +       rt2800_rfcsr_write_bank(rt2x00dev, 5, 4, saverfb5r4);
  69 +       rt2800_rfcsr_write_bank(rt2x00dev, 7, 4, saverfb7r4);
  70 +
  71 +       rt2800_bbp_write(rt2x00dev, 158, 141);
  72 +       bbpreg = rt2800_bbp_read(rt2x00dev, 159);
  73 +       bbpreg = bbpreg & (~0x40);
  74 +       rt2800_bbp_write(rt2x00dev, 159, bbpreg);
  75 +       bbpreg |= 0x48;
  76 +       rt2800_bbp_write(rt2x00dev, 159, bbpreg);
  77 +
  78 +       for (i = 0; i < 10000; i++) {
  79 +               bbpreg = rt2800_bbp_read(rt2x00dev, 159);
  80 +               if ((bbpreg & 0x40) == 0)
  81 +                       break;
  82 +               usleep_range(50, 100);
  83 +       }
  84 +
  85 +       bbpreg = rt2800_bbp_read(rt2x00dev, 159);
  86 +       bbpreg = bbpreg & (~0x40);
  87 +       rt2800_bbp_write(rt2x00dev, 159, bbpreg);
  88 +
  89 +       rt2800_register_write(rt2x00dev, MAC_SYS_CTRL, macvalue);
  90 +
  91 +       rt2800_bbp_write(rt2x00dev, 158, 141);
  92 +       bbpreg = rt2800_bbp_read(rt2x00dev, 159);
  93 +       bbpreg &= (~0x10);
  94 +       rt2800_bbp_write(rt2x00dev, 159, bbpreg);
  95 +
  96 +       rt2800_rfcsr_write_bank(rt2x00dev, 0, 2, saverfb0r2);
  97 +}
  98 +
  99  static void rt2800_bbp_core_soft_reset(struct rt2x00_dev *rt2x00dev,
 100                                        bool set_bw, bool is_ht40)
 101  {
 102 @@ -9241,6 +9305,7 @@ static void rt2800_init_rfcsr_6352(struc
 103
 104         rt2800_r_calibration(rt2x00dev);
 105         rt2800_rf_self_txdc_cal(rt2x00dev);
 106 +       rt2800_rxdcoc_calibration(rt2x00dev);
 107         rt2800_bw_filter_calibration(rt2x00dev, true);
 108         rt2800_bw_filter_calibration(rt2x00dev, false);
 109  }