package/kernel/mac80211/patches/rt2x00/003-v6.1-rt2x00-add-support-for-external-PA-on-MT7620.patch

   1 From patchwork Sat Sep 17 20:26:55 2022
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   5 X-Patchwork-Submitter: Daniel Golle <daniel@makrotopia.org>
   6 X-Patchwork-Id: 12979244
   7 X-Patchwork-Delegate: kvalo@adurom.com
   8 Return-Path: <linux-wireless-owner@kernel.org>
   9 Date: Sat, 17 Sep 2022 21:26:55 +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 03/16] rt2x00: add support for external PA on MT7620
  20 Message-ID:
  21  <af2c68ff831816a86fc39b0c10911c129a1f03dc.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 Implement support for external PA connected to MT7620A.
  31
  32 Signed-off-by: Tomislav Požega <pozega.tomislav@gmail.com>
  33 [pozega.tomislav@gmail.com: use chanreg and dccal helpers.]
  34 Signed-off-by: Daniel Golle <daniel@makrotopia.org>
  35 Acked-by: Stanislaw Gruszka <stf_xl@wp.pl>
  36 ---
  37  drivers/net/wireless/ralink/rt2x00/rt2800.h   |  1 +
  38  .../net/wireless/ralink/rt2x00/rt2800lib.c    | 52 ++++++++++++++++++-
  39  2 files changed, 52 insertions(+), 1 deletion(-)
  40
  41 --- a/drivers/net/wireless/ralink/rt2x00/rt2800.h
  42 +++ b/drivers/net/wireless/ralink/rt2x00/rt2800.h
  43 @@ -2739,6 +2739,7 @@ enum rt2800_eeprom_word {
  44  #define EEPROM_NIC_CONF2_RX_STREAM     FIELD16(0x000f)
  45  #define EEPROM_NIC_CONF2_TX_STREAM     FIELD16(0x00f0)
  46  #define EEPROM_NIC_CONF2_CRYSTAL       FIELD16(0x0600)
  47 +#define EEPROM_NIC_CONF2_EXTERNAL_PA   FIELD16(0x8000)
  48
  49  /*
  50   * EEPROM LNA
  51 --- a/drivers/net/wireless/ralink/rt2x00/rt2800lib.c
  52 +++ b/drivers/net/wireless/ralink/rt2x00/rt2800lib.c
  53 @@ -4372,6 +4372,43 @@ static void rt2800_config_channel(struct
  54                         rt2800_iq_calibrate(rt2x00dev, rf->channel);
  55         }
  56
  57 +       if (rt2x00_rt(rt2x00dev, RT6352)) {
  58 +               if (test_bit(CAPABILITY_EXTERNAL_PA_TX0,
  59 +                            &rt2x00dev->cap_flags)) {
  60 +                       reg = rt2800_register_read(rt2x00dev, RF_CONTROL3);
  61 +                       reg |= 0x00000101;
  62 +                       rt2800_register_write(rt2x00dev, RF_CONTROL3, reg);
  63 +
  64 +                       reg = rt2800_register_read(rt2x00dev, RF_BYPASS3);
  65 +                       reg |= 0x00000101;
  66 +                       rt2800_register_write(rt2x00dev, RF_BYPASS3, reg);
  67 +
  68 +                       rt2800_rfcsr_write_chanreg(rt2x00dev, 43, 0x73);
  69 +                       rt2800_rfcsr_write_chanreg(rt2x00dev, 44, 0x73);
  70 +                       rt2800_rfcsr_write_chanreg(rt2x00dev, 45, 0x73);
  71 +                       rt2800_rfcsr_write_chanreg(rt2x00dev, 46, 0x27);
  72 +                       rt2800_rfcsr_write_chanreg(rt2x00dev, 47, 0xC8);
  73 +                       rt2800_rfcsr_write_chanreg(rt2x00dev, 48, 0xA4);
  74 +                       rt2800_rfcsr_write_chanreg(rt2x00dev, 49, 0x05);
  75 +                       rt2800_rfcsr_write_chanreg(rt2x00dev, 54, 0x27);
  76 +                       rt2800_rfcsr_write_chanreg(rt2x00dev, 55, 0xC8);
  77 +                       rt2800_rfcsr_write_chanreg(rt2x00dev, 56, 0xA4);
  78 +                       rt2800_rfcsr_write_chanreg(rt2x00dev, 57, 0x05);
  79 +                       rt2800_rfcsr_write_chanreg(rt2x00dev, 58, 0x27);
  80 +                       rt2800_rfcsr_write_chanreg(rt2x00dev, 59, 0xC8);
  81 +                       rt2800_rfcsr_write_chanreg(rt2x00dev, 60, 0xA4);
  82 +                       rt2800_rfcsr_write_chanreg(rt2x00dev, 61, 0x05);
  83 +                       rt2800_rfcsr_write_dccal(rt2x00dev, 05, 0x00);
  84 +
  85 +                       rt2800_register_write(rt2x00dev, TX0_RF_GAIN_CORRECT,
  86 +                                             0x36303636);
  87 +                       rt2800_register_write(rt2x00dev, TX0_RF_GAIN_ATTEN,
  88 +                                             0x6C6C6B6C);
  89 +                       rt2800_register_write(rt2x00dev, TX1_RF_GAIN_ATTEN,
  90 +                                             0x6C6C6B6C);
  91 +               }
  92 +       }
  93 +
  94         bbp = rt2800_bbp_read(rt2x00dev, 4);
  95         rt2x00_set_field8(&bbp, BBP4_BANDWIDTH, 2 * conf_is_ht40(conf));
  96         rt2800_bbp_write(rt2x00dev, 4, bbp);
  97 @@ -9592,7 +9629,8 @@ static int rt2800_init_eeprom(struct rt2
  98          */
  99         eeprom = rt2800_eeprom_read(rt2x00dev, EEPROM_NIC_CONF1);
 100
 101 -       if (rt2x00_rt(rt2x00dev, RT3352)) {
 102 +       if (rt2x00_rt(rt2x00dev, RT3352) ||
 103 +           rt2x00_rt(rt2x00dev, RT6352)) {
 104                 if (rt2x00_get_field16(eeprom,
 105                     EEPROM_NIC_CONF1_EXTERNAL_TX0_PA_3352))
 106                     __set_bit(CAPABILITY_EXTERNAL_PA_TX0,
 107 @@ -9603,6 +9641,18 @@ static int rt2800_init_eeprom(struct rt2
 108                               &rt2x00dev->cap_flags);
 109         }
 110
 111 +       eeprom = rt2800_eeprom_read(rt2x00dev, EEPROM_NIC_CONF2);
 112 +
 113 +       if (rt2x00_rt(rt2x00dev, RT6352) && eeprom != 0 && eeprom != 0xffff) {
 114 +               if (!rt2x00_get_field16(eeprom,
 115 +                                       EEPROM_NIC_CONF2_EXTERNAL_PA)) {
 116 +                       __clear_bit(CAPABILITY_EXTERNAL_PA_TX0,
 117 +                                   &rt2x00dev->cap_flags);
 118 +                       __clear_bit(CAPABILITY_EXTERNAL_PA_TX1,
 119 +                                   &rt2x00dev->cap_flags);
 120 +               }
 121 +       }
 122 +
 123         return 0;
 124  }
 125