package/kernel/mac80211/patches/rt2x00/004-1-v6.7-wifi-rt2x00-improve-MT7620-register-initialization.patch

   1 From 1ffe76d5ae78553948d67a978acd9945c2f0a175 Mon Sep 17 00:00:00 2001
   2 From: Shiji Yang <yangshiji66@outlook.com>
   3 Date: Thu, 19 Oct 2023 19:58:56 +0800
   4 Subject: wifi: rt2x00: improve MT7620 register initialization
   5
   6 1. Do not hard reset the BBP. We can use soft reset instead. This
   7    change has some help to the calibration failure issue.
   8 2. Enable falling back to legacy rate from the HT/RTS rate by
   9    setting the HT_FBK_TO_LEGACY register.
  10 3. Implement MCS rate specific maximum PSDU size. It can improve
  11    the transmission quality under the low RSSI condition.
  12 4. Set BBP_84 register value to 0x19. This is used for extension
  13    channel overlapping IOT.
  14
  15 Signed-off-by: Shiji Yang <yangshiji66@outlook.com>
  16 Acked-by: Stanislaw Gruszka <stf_xl@wp.pl>
  17 Signed-off-by: Kalle Valo <kvalo@kernel.org>
  18 Link: https://lore.kernel.org/r/TYAP286MB031553CCD4B7A3B89C85935DBCD4A@TYAP286MB0315.JPNP286.PROD.OUTLOOK.COM
  19 ---
  20  drivers/net/wireless/ralink/rt2x00/rt2800.h     | 18 ++++++++++++++++++
  21  drivers/net/wireless/ralink/rt2x00/rt2800lib.c  | 24 ++++++++++++++++++++++++
  22  drivers/net/wireless/ralink/rt2x00/rt2800mmio.c |  3 +++
  23  3 files changed, 45 insertions(+)
  24
  25 --- a/drivers/net/wireless/ralink/rt2x00/rt2800.h
  26 +++ b/drivers/net/wireless/ralink/rt2x00/rt2800.h
  27 @@ -871,6 +871,18 @@
  28  #define LED_CFG_LED_POLAR              FIELD32(0x40000000)
  29
  30  /*
  31 + * AMPDU_MAX_LEN_20M1S: Per MCS max A-MPDU length, 20 MHz, MCS 0-7
  32 + * AMPDU_MAX_LEN_20M2S: Per MCS max A-MPDU length, 20 MHz, MCS 8-15
  33 + * AMPDU_MAX_LEN_40M1S: Per MCS max A-MPDU length, 40 MHz, MCS 0-7
  34 + * AMPDU_MAX_LEN_40M2S: Per MCS max A-MPDU length, 40 MHz, MCS 8-15
  35 + * Maximum A-MPDU length = 2^(AMPDU_MAX - 5) kilobytes
  36 + */
  37 +#define AMPDU_MAX_LEN_20M1S            0x1030
  38 +#define AMPDU_MAX_LEN_20M2S            0x1034
  39 +#define AMPDU_MAX_LEN_40M1S            0x1038
  40 +#define AMPDU_MAX_LEN_40M2S            0x103C
  41 +
  42 +/*
  43   * AMPDU_BA_WINSIZE: Force BlockAck window size
  44   * FORCE_WINSIZE_ENABLE:
  45   *   0: Disable forcing of BlockAck window size
  46 @@ -1545,6 +1557,12 @@
  47   */
  48  #define EXP_ACK_TIME                   0x1380
  49
  50 +/*
  51 + * HT_FBK_TO_LEGACY: Enable/Disable HT/RTS fallback to OFDM/CCK rate
  52 + * Not available for legacy SoCs
  53 + */
  54 +#define HT_FBK_TO_LEGACY               0x1384
  55 +
  56  /* TX_PWR_CFG_5 */
  57  #define TX_PWR_CFG_5                   0x1384
  58  #define TX_PWR_CFG_5_MCS16_CH0         FIELD32(0x0000000f)
  59 --- a/drivers/net/wireless/ralink/rt2x00/rt2800lib.c
  60 +++ b/drivers/net/wireless/ralink/rt2x00/rt2800lib.c
  61 @@ -5851,6 +5851,7 @@ static int rt2800_init_registers(struct
  62         struct rt2800_drv_data *drv_data = rt2x00dev->drv_data;
  63         u32 reg;
  64         u16 eeprom;
  65 +       u8 bbp;
  66         unsigned int i;
  67         int ret;
  68
  69 @@ -5860,6 +5861,19 @@ static int rt2800_init_registers(struct
  70         if (ret)
  71                 return ret;
  72
  73 +       if (rt2x00_rt(rt2x00dev, RT6352)) {
  74 +               rt2800_register_write(rt2x00dev, MAC_SYS_CTRL, 0x01);
  75 +
  76 +               bbp = rt2800_bbp_read(rt2x00dev, 21);
  77 +               bbp |= 0x01;
  78 +               rt2800_bbp_write(rt2x00dev, 21, bbp);
  79 +               bbp = rt2800_bbp_read(rt2x00dev, 21);
  80 +               bbp &= (~0x01);
  81 +               rt2800_bbp_write(rt2x00dev, 21, bbp);
  82 +
  83 +               rt2800_register_write(rt2x00dev, MAC_SYS_CTRL, 0x00);
  84 +       }
  85 +
  86         rt2800_register_write(rt2x00dev, LEGACY_BASIC_RATE, 0x0000013f);
  87         rt2800_register_write(rt2x00dev, HT_BASIC_RATE, 0x00008003);
  88
  89 @@ -6013,6 +6027,14 @@ static int rt2800_init_registers(struct
  90                 reg = rt2800_register_read(rt2x00dev, TX_ALC_CFG_1);
  91                 rt2x00_set_field32(&reg, TX_ALC_CFG_1_ROS_BUSY_EN, 0);
  92                 rt2800_register_write(rt2x00dev, TX_ALC_CFG_1, reg);
  93 +
  94 +               rt2800_register_write(rt2x00dev, AMPDU_MAX_LEN_20M1S, 0x77754433);
  95 +               rt2800_register_write(rt2x00dev, AMPDU_MAX_LEN_20M2S, 0x77765543);
  96 +               rt2800_register_write(rt2x00dev, AMPDU_MAX_LEN_40M1S, 0x77765544);
  97 +               rt2800_register_write(rt2x00dev, AMPDU_MAX_LEN_40M2S, 0x77765544);
  98 +
  99 +               rt2800_register_write(rt2x00dev, HT_FBK_TO_LEGACY, 0x1010);
 100 +
 101         } else {
 102                 rt2800_register_write(rt2x00dev, TX_SW_CFG0, 0x00000000);
 103                 rt2800_register_write(rt2x00dev, TX_SW_CFG1, 0x00080606);
 104 @@ -7231,6 +7253,8 @@ static void rt2800_init_bbp_6352(struct
 105         rt2800_bbp_dcoc_write(rt2x00dev, 159, 0x64);
 106
 107         rt2800_bbp4_mac_if_ctrl(rt2x00dev);
 108 +
 109 +       rt2800_bbp_write(rt2x00dev, 84, 0x19);
 110  }
 111
 112  static void rt2800_init_bbp(struct rt2x00_dev *rt2x00dev)
 113 --- a/drivers/net/wireless/ralink/rt2x00/rt2800mmio.c
 114 +++ b/drivers/net/wireless/ralink/rt2x00/rt2800mmio.c
 115 @@ -760,6 +760,9 @@ int rt2800mmio_init_registers(struct rt2
 116
 117         rt2x00mmio_register_write(rt2x00dev, PWR_PIN_CFG, 0x00000003);
 118
 119 +       if (rt2x00_rt(rt2x00dev, RT6352))
 120 +               return 0;
 121 +
 122         reg = 0;
 123         rt2x00_set_field32(&reg, MAC_SYS_CTRL_RESET_CSR, 1);
 124         rt2x00_set_field32(&reg, MAC_SYS_CTRL_RESET_BBP, 1);