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

   1 From: =?UTF-8?q?Tomislav=20Po=C5=BEega?= <pozega.tomislav@gmail.com>
   2 Date: Mon, 8 Jan 2018 13:43:37 +0100
   3 Subject: [PATCH] rt2x00: add RXDCOC calibration
   4 MIME-Version: 1.0
   5 Content-Type: text/plain; charset=UTF-8
   6 Content-Transfer-Encoding: 8bit
   7
   8 Add RXDCOC calibration code from mtk driver.
   9
  10 Signed-off-by: Tomislav Požega <pozega.tomislav@gmail.com>
  11 ---
  12  .../net/wireless/ralink/rt2x00/rt2800lib.c    | 65 +++++++++++++++++++
  13  1 file changed, 65 insertions(+)
  14
  15 --- a/drivers/net/wireless/ralink/rt2x00/rt2800lib.c
  16 +++ b/drivers/net/wireless/ralink/rt2x00/rt2800lib.c
  17 @@ -8637,6 +8637,70 @@ static void rt2800_r_calibration(struct
  18         rt2800_register_write(rt2x00dev, PWR_PIN_CFG, MAC_PWR_PIN_CFG);
  19  }
  20
  21 +static void rt2800_rxdcoc_calibration(struct rt2x00_dev *rt2x00dev)
  22 +{
  23 +       u8 bbpreg = 0;
  24 +       u32 macvalue = 0, macvalue1 = 0;
  25 +       u8 saverfb0r2, saverfb5r4, saverfb7r4, rfvalue;
  26 +       int i;
  27 +
  28 +       saverfb0r2 = rt2800_rfcsr_read_bank(rt2x00dev, 0, 2);
  29 +       rfvalue = saverfb0r2;
  30 +       rfvalue |= 0x03;
  31 +       rt2800_rfcsr_write_bank(rt2x00dev, 0, 2, rfvalue);
  32 +
  33 +       rt2800_bbp_write(rt2x00dev, 158, 141);
  34 +       bbpreg = rt2800_bbp_read(rt2x00dev, 159);
  35 +       bbpreg |= 0x10;
  36 +       rt2800_bbp_write(rt2x00dev, 159, bbpreg);
  37 +
  38 +       macvalue = rt2800_register_read(rt2x00dev, MAC_SYS_CTRL);
  39 +       rt2800_register_write(rt2x00dev, MAC_SYS_CTRL, 0x8);
  40 +
  41 +       for (i = 0; i < 10000; i++) {
  42 +               macvalue1 = rt2800_register_read(rt2x00dev, MAC_STATUS_CFG);
  43 +               if (macvalue1 & 0x1)
  44 +                       udelay(50);
  45 +               else
  46 +                       break;
  47 +       }
  48 +
  49 +       saverfb5r4 = rt2800_rfcsr_read_bank(rt2x00dev, 5, 0);
  50 +       saverfb7r4 = rt2800_rfcsr_read_bank(rt2x00dev, 7, 4);
  51 +       saverfb5r4 = saverfb5r4 & (~0x40);
  52 +       saverfb7r4 = saverfb7r4 & (~0x40);
  53 +       rt2800_rfcsr_write_dccal(rt2x00dev, 4, 0x64);
  54 +       rt2800_rfcsr_write_bank(rt2x00dev, 5, 4, saverfb5r4);
  55 +       rt2800_rfcsr_write_bank(rt2x00dev, 7, 4, saverfb7r4);
  56 +
  57 +       rt2800_bbp_write(rt2x00dev, 158, 141);
  58 +       bbpreg = rt2800_bbp_read(rt2x00dev, 159);
  59 +       bbpreg = bbpreg & (~0x40);
  60 +       rt2800_bbp_write(rt2x00dev, 159, bbpreg);
  61 +       bbpreg |= 0x48;
  62 +       rt2800_bbp_write(rt2x00dev, 159, bbpreg);
  63 +
  64 +       for (i = 0; i < 10000; i++) {
  65 +               bbpreg = rt2800_bbp_read(rt2x00dev, 159);
  66 +               if ((bbpreg & 0x40)==0)
  67 +                       break;
  68 +               udelay(50);
  69 +       }
  70 +
  71 +       bbpreg = rt2800_bbp_read(rt2x00dev, 159);
  72 +       bbpreg = bbpreg & (~0x40);
  73 +       rt2800_bbp_write(rt2x00dev, 159, bbpreg);
  74 +
  75 +       rt2800_register_write(rt2x00dev, MAC_SYS_CTRL, macvalue);
  76 +
  77 +       rt2800_bbp_write(rt2x00dev, 158, 141);
  78 +       bbpreg = rt2800_bbp_read(rt2x00dev, 159);
  79 +       bbpreg &= (~0x10);
  80 +       rt2800_bbp_write(rt2x00dev, 159, bbpreg);
  81 +
  82 +       rt2800_rfcsr_write_bank(rt2x00dev, 0, 2, saverfb0r2);
  83 +}
  84 +
  85  static void rt2800_bbp_core_soft_reset(struct rt2x00_dev *rt2x00dev,
  86                                        bool set_bw, bool is_ht40)
  87  {
  88 @@ -9246,6 +9310,7 @@ static void rt2800_init_rfcsr_6352(struc
  89
  90         rt2800_r_calibration(rt2x00dev);
  91         rt2800_rf_self_txdc_cal(rt2x00dev);
  92 +       rt2800_rxdcoc_calibration(rt2x00dev);
  93         rt2800_bw_filter_calibration(rt2x00dev, true);
  94         rt2800_bw_filter_calibration(rt2x00dev, false);
  95  }