package/kernel/mac80211/patches/rt2x00/982-rt2x00-add-RF-self-TXDC-calibration.patch

   1 From 21f2acf0f9e9da35fbdb96ee0aea97b02472030b Mon Sep 17 00:00:00 2001
   2 From: Daniel Golle <daniel@makrotopia.org>
   3 Date: Mon, 8 Jan 2018 13:42:27 +0100
   4 Subject: [PATCH 04/16] rt2x00: add RF self TXDC 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 TX self calibration based on mtk driver.
  21
  22 Signed-off-by: Tomislav Požega <pozega.tomislav@gmail.com>
  23 ---
  24  .../net/wireless/ralink/rt2x00/rt2800lib.c    | 48 +++++++++++++++++++
  25  1 file changed, 48 insertions(+)
  26
  27 --- a/drivers/net/wireless/ralink/rt2x00/rt2800lib.c
  28 +++ b/drivers/net/wireless/ralink/rt2x00/rt2800lib.c
  29 @@ -8436,6 +8436,53 @@ static void rt2800_init_rfcsr_5592(struc
  30         rt2800_led_open_drain_enable(rt2x00dev);
  31  }
  32
  33 +static void rt2800_rf_self_txdc_cal(struct rt2x00_dev *rt2x00dev)
  34 +{
  35 +       u8 rfb5r1_org, rfb7r1_org, rfvalue;
  36 +       u32 mac0518, mac051c, mac0528, mac052c;
  37 +       u8 i;
  38 +
  39 +       mac0518 = rt2800_register_read(rt2x00dev, RF_CONTROL0);
  40 +       mac051c = rt2800_register_read(rt2x00dev, RF_BYPASS0);
  41 +       mac0528 = rt2800_register_read(rt2x00dev, RF_CONTROL2);
  42 +       mac052c = rt2800_register_read(rt2x00dev, RF_BYPASS2);
  43 +
  44 +       rt2800_register_write(rt2x00dev, RF_BYPASS0, 0x0);
  45 +       rt2800_register_write(rt2x00dev, RF_BYPASS2, 0x0);
  46 +
  47 +       rt2800_register_write(rt2x00dev, RF_CONTROL0, 0xC);
  48 +       rt2800_register_write(rt2x00dev, RF_BYPASS0, 0x3306);
  49 +       rt2800_register_write(rt2x00dev, RF_CONTROL2, 0x3330);
  50 +       rt2800_register_write(rt2x00dev, RF_BYPASS2, 0xfffff);
  51 +       rfb5r1_org = rt2800_rfcsr_read_bank(rt2x00dev, 5, 1);
  52 +       rfb7r1_org = rt2800_rfcsr_read_bank(rt2x00dev, 7, 1);
  53 +
  54 +       rt2800_rfcsr_write_bank(rt2x00dev, 5, 1, 0x4);
  55 +       for (i = 0; i < 100; i = i + 1) {
  56 +               usleep_range(50, 100);
  57 +               rfvalue = rt2800_rfcsr_read_bank(rt2x00dev, 5, 1);
  58 +               if ((rfvalue & 0x04) != 0x4)
  59 +                       break;
  60 +       }
  61 +       rt2800_rfcsr_write_bank(rt2x00dev, 5, 1, rfb5r1_org);
  62 +
  63 +       rt2800_rfcsr_write_bank(rt2x00dev, 7, 1, 0x4);
  64 +       for (i = 0; i < 100; i = i + 1) {
  65 +               usleep_range(50, 100);
  66 +               rfvalue = rt2800_rfcsr_read_bank(rt2x00dev, 7, 1);
  67 +               if ((rfvalue & 0x04) != 0x4)
  68 +                       break;
  69 +       }
  70 +       rt2800_rfcsr_write_bank(rt2x00dev, 7, 1, rfb7r1_org);
  71 +
  72 +       rt2800_register_write(rt2x00dev, RF_BYPASS0, 0x0);
  73 +       rt2800_register_write(rt2x00dev, RF_BYPASS2, 0x0);
  74 +       rt2800_register_write(rt2x00dev, RF_CONTROL0, mac0518);
  75 +       rt2800_register_write(rt2x00dev, RF_BYPASS0, mac051c);
  76 +       rt2800_register_write(rt2x00dev, RF_CONTROL2, mac0528);
  77 +       rt2800_register_write(rt2x00dev, RF_BYPASS2, mac052c);
  78 +}
  79 +
  80  static void rt2800_bbp_core_soft_reset(struct rt2x00_dev *rt2x00dev,
  81                                        bool set_bw, bool is_ht40)
  82  {
  83 @@ -9043,6 +9090,7 @@ static void rt2800_init_rfcsr_6352(struc
  84         rt2800_rfcsr_write_dccal(rt2x00dev, 5, 0x00);
  85         rt2800_rfcsr_write_dccal(rt2x00dev, 17, 0x7C);
  86
  87 +       rt2800_rf_self_txdc_cal(rt2x00dev);
  88         rt2800_bw_filter_calibration(rt2x00dev, true);
  89         rt2800_bw_filter_calibration(rt2x00dev, false);
  90  }