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   1 From patchwork Sat Sep 17 20:27:26 2022
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   5 X-Patchwork-Submitter: Daniel Golle <daniel@makrotopia.org>
   6 X-Patchwork-Id: 12979246
   7 X-Patchwork-Delegate: kvalo@adurom.com
   8 Return-Path: <linux-wireless-owner@kernel.org>
   9 Date: Sat, 17 Sep 2022 21:27:26 +0100
  10 From: Daniel Golle <daniel@makrotopia.org>
  11 To: linux-wireless@vger.kernel.org, Stanislaw Gruszka <stf_xl@wp.pl>,
  12         Helmut Schaa <helmut.schaa@googlemail.com>
  13 Cc: Kalle Valo <kvalo@kernel.org>,
  14         "David S. Miller" <davem@davemloft.net>,
  15         Eric Dumazet <edumazet@google.com>,
  16         Jakub Kicinski <kuba@kernel.org>,
  17         Paolo Abeni <pabeni@redhat.com>,
  18         Johannes Berg <johannes.berg@intel.com>
  19 Subject: [PATCH v3 05/16] rt2x00: add RF self TXDC calibration for MT7620
  20 Message-ID:
  21  <dbb6e5a0c12d6101477bd09e83253091d21512c9.1663445157.git.daniel@makrotopia.org>
  22 References: <cover.1663445157.git.daniel@makrotopia.org>
  23 MIME-Version: 1.0
  24 Content-Disposition: inline
  25 In-Reply-To: <cover.1663445157.git.daniel@makrotopia.org>
  26 Precedence: bulk
  27 List-ID: <linux-wireless.vger.kernel.org>
  28 X-Mailing-List: linux-wireless@vger.kernel.org
  29
  30 From: Tomislav Požega <pozega.tomislav@gmail.com>
  31
  32 Add TX self calibration based on mtk driver.
  33
  34 Signed-off-by: Tomislav Požega <pozega.tomislav@gmail.com>
  35 Signed-off-by: Daniel Golle <daniel@makrotopia.org>
  36 Acked-by: Stanislaw Gruszka <stf_xl@wp.pl>
  37 ---
  38 v2: use ++i instead of i = i + 1 in loops
  39
  40  .../net/wireless/ralink/rt2x00/rt2800lib.c    | 48 +++++++++++++++++++
  41  1 file changed, 48 insertions(+)
  42
  43 --- a/drivers/net/wireless/ralink/rt2x00/rt2800lib.c
  44 +++ b/drivers/net/wireless/ralink/rt2x00/rt2800lib.c
  45 @@ -8428,6 +8428,53 @@ static void rt2800_init_rfcsr_5592(struc
  46         rt2800_led_open_drain_enable(rt2x00dev);
  47  }
  48
  49 +static void rt2800_rf_self_txdc_cal(struct rt2x00_dev *rt2x00dev)
  50 +{
  51 +       u8 rfb5r1_org, rfb7r1_org, rfvalue;
  52 +       u32 mac0518, mac051c, mac0528, mac052c;
  53 +       u8 i;
  54 +
  55 +       mac0518 = rt2800_register_read(rt2x00dev, RF_CONTROL0);
  56 +       mac051c = rt2800_register_read(rt2x00dev, RF_BYPASS0);
  57 +       mac0528 = rt2800_register_read(rt2x00dev, RF_CONTROL2);
  58 +       mac052c = rt2800_register_read(rt2x00dev, RF_BYPASS2);
  59 +
  60 +       rt2800_register_write(rt2x00dev, RF_BYPASS0, 0x0);
  61 +       rt2800_register_write(rt2x00dev, RF_BYPASS2, 0x0);
  62 +
  63 +       rt2800_register_write(rt2x00dev, RF_CONTROL0, 0xC);
  64 +       rt2800_register_write(rt2x00dev, RF_BYPASS0, 0x3306);
  65 +       rt2800_register_write(rt2x00dev, RF_CONTROL2, 0x3330);
  66 +       rt2800_register_write(rt2x00dev, RF_BYPASS2, 0xfffff);
  67 +       rfb5r1_org = rt2800_rfcsr_read_bank(rt2x00dev, 5, 1);
  68 +       rfb7r1_org = rt2800_rfcsr_read_bank(rt2x00dev, 7, 1);
  69 +
  70 +       rt2800_rfcsr_write_bank(rt2x00dev, 5, 1, 0x4);
  71 +       for (i = 0; i < 100; ++i) {
  72 +               usleep_range(50, 100);
  73 +               rfvalue = rt2800_rfcsr_read_bank(rt2x00dev, 5, 1);
  74 +               if ((rfvalue & 0x04) != 0x4)
  75 +                       break;
  76 +       }
  77 +       rt2800_rfcsr_write_bank(rt2x00dev, 5, 1, rfb5r1_org);
  78 +
  79 +       rt2800_rfcsr_write_bank(rt2x00dev, 7, 1, 0x4);
  80 +       for (i = 0; i < 100; ++i) {
  81 +               usleep_range(50, 100);
  82 +               rfvalue = rt2800_rfcsr_read_bank(rt2x00dev, 7, 1);
  83 +               if ((rfvalue & 0x04) != 0x4)
  84 +                       break;
  85 +       }
  86 +       rt2800_rfcsr_write_bank(rt2x00dev, 7, 1, rfb7r1_org);
  87 +
  88 +       rt2800_register_write(rt2x00dev, RF_BYPASS0, 0x0);
  89 +       rt2800_register_write(rt2x00dev, RF_BYPASS2, 0x0);
  90 +       rt2800_register_write(rt2x00dev, RF_CONTROL0, mac0518);
  91 +       rt2800_register_write(rt2x00dev, RF_BYPASS0, mac051c);
  92 +       rt2800_register_write(rt2x00dev, RF_CONTROL2, mac0528);
  93 +       rt2800_register_write(rt2x00dev, RF_BYPASS2, mac052c);
  94 +}
  95 +
  96  static void rt2800_bbp_core_soft_reset(struct rt2x00_dev *rt2x00dev,
  97                                        bool set_bw, bool is_ht40)
  98  {
  99 @@ -9035,6 +9082,7 @@ static void rt2800_init_rfcsr_6352(struc
 100         rt2800_rfcsr_write_dccal(rt2x00dev, 5, 0x00);
 101         rt2800_rfcsr_write_dccal(rt2x00dev, 17, 0x7C);
 102
 103 +       rt2800_rf_self_txdc_cal(rt2x00dev);
 104         rt2800_bw_filter_calibration(rt2x00dev, true);
 105         rt2800_bw_filter_calibration(rt2x00dev, false);
 106  }