package/kernel/mac80211/patches/334-ath9k-allow-disabling-bands-via-platform-data.patch

   1 From: Felix Fietkau <nbd@openwrt.org>
   2 Date: Sat, 18 Oct 2014 18:27:23 +0200
   3 Subject: [PATCH] ath9k: allow disabling bands via platform data
   4
   5 Some devices have multiple bands enables in the EEPROM data, even though
   6 they are only calibrated for one. Allow platform data to disable
   7 unsupported bands.
   8
   9 Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
  10 Signed-off-by: Felix Fietkau <nbd@openwrt.org>
  11 ---
  12
  13 --- a/drivers/net/wireless/ath/ath9k/hw.c
  14 +++ b/drivers/net/wireless/ath/ath9k/hw.c
  15 @@ -2344,17 +2344,25 @@ int ath9k_hw_fill_cap_info(struct ath_hw
  16         }
  17
  18         eeval = ah->eep_ops->get_eeprom(ah, EEP_OP_MODE);
  19 -       if ((eeval & (AR5416_OPFLAGS_11G | AR5416_OPFLAGS_11A)) == 0) {
  20 -               ath_err(common,
  21 -                       "no band has been marked as supported in EEPROM\n");
  22 -               return -EINVAL;
  23 +
  24 +       if (eeval & AR5416_OPFLAGS_11A) {
  25 +               if (ah->disable_5ghz)
  26 +                       ath_warn(common, "disabling 5GHz band\n");
  27 +               else
  28 +                       pCap->hw_caps |= ATH9K_HW_CAP_5GHZ;
  29         }
  30
  31 -       if (eeval & AR5416_OPFLAGS_11A)
  32 -               pCap->hw_caps |= ATH9K_HW_CAP_5GHZ;
  33 +       if (eeval & AR5416_OPFLAGS_11G) {
  34 +               if (ah->disable_2ghz)
  35 +                       ath_warn(common, "disabling 2GHz band\n");
  36 +               else
  37 +                       pCap->hw_caps |= ATH9K_HW_CAP_2GHZ;
  38 +       }
  39
  40 -       if (eeval & AR5416_OPFLAGS_11G)
  41 -               pCap->hw_caps |= ATH9K_HW_CAP_2GHZ;
  42 +       if ((pCap->hw_caps & (ATH9K_HW_CAP_2GHZ | ATH9K_HW_CAP_5GHZ)) == 0) {
  43 +               ath_err(common, "both bands are disabled\n");
  44 +               return -EINVAL;
  45 +       }
  46
  47         if (AR_SREV_9485(ah) ||
  48             AR_SREV_9285(ah) ||
  49 --- a/drivers/net/wireless/ath/ath9k/hw.h
  50 +++ b/drivers/net/wireless/ath/ath9k/hw.h
  51 @@ -930,6 +930,8 @@ struct ath_hw {
  52         bool is_clk_25mhz;
  53         int (*get_mac_revision)(void);
  54         int (*external_reset)(void);
  55 +       bool disable_2ghz;
  56 +       bool disable_5ghz;
  57
  58         const struct firmware *eeprom_blob;
  59
  60 --- a/drivers/net/wireless/ath/ath9k/init.c
  61 +++ b/drivers/net/wireless/ath/ath9k/init.c
  62 @@ -531,6 +531,8 @@ static int ath9k_init_softc(u16 devid, s
  63                 ah->is_clk_25mhz = pdata->is_clk_25mhz;
  64                 ah->get_mac_revision = pdata->get_mac_revision;
  65                 ah->external_reset = pdata->external_reset;
  66 +               ah->disable_2ghz = pdata->disable_2ghz;
  67 +               ah->disable_5ghz = pdata->disable_5ghz;
  68                 if (!pdata->endian_check)
  69                         ah->ah_flags |= AH_NO_EEP_SWAP;
  70         }
  71 --- a/include/linux/ath9k_platform.h
  72 +++ b/include/linux/ath9k_platform.h
  73 @@ -34,6 +34,8 @@ struct ath9k_platform_data {
  74         bool endian_check;
  75         bool is_clk_25mhz;
  76         bool tx_gain_buffalo;
  77 +       bool disable_2ghz;
  78 +       bool disable_5ghz;
  79
  80         int (*get_mac_revision)(void);
  81         int (*external_reset)(void);