package/kernel/mac80211/patches/512-ath9k_channelbw_debugfs.patch

   1 --- a/drivers/net/wireless/ath/ath9k/ath9k.h
   2 +++ b/drivers/net/wireless/ath/ath9k/ath9k.h
   3 @@ -701,6 +701,7 @@ struct ath_softc {
   4         struct ieee80211_hw *hw;
   5         struct device *dev;
   6
   7 +       u32 chan_bw;
   8         struct survey_info *cur_survey;
   9         struct survey_info survey[ATH9K_NUM_CHANNELS];
  10
  11 --- a/drivers/net/wireless/ath/ath9k/debug.c
  12 +++ b/drivers/net/wireless/ath/ath9k/debug.c
  13 @@ -1918,6 +1918,50 @@ static const struct file_operations fops
  14         .owner = THIS_MODULE
  15  };
  16
  17 +
  18 +static ssize_t read_file_chan_bw(struct file *file, char __user *user_buf,
  19 +                            size_t count, loff_t *ppos)
  20 +{
  21 +       struct ath_softc *sc = file->private_data;
  22 +       char buf[32];
  23 +       unsigned int len;
  24 +
  25 +       len = sprintf(buf, "0x%08x\n", sc->chan_bw);
  26 +       return simple_read_from_buffer(user_buf, count, ppos, buf, len);
  27 +}
  28 +
  29 +static ssize_t write_file_chan_bw(struct file *file, const char __user *user_buf,
  30 +                            size_t count, loff_t *ppos)
  31 +{
  32 +       struct ath_softc *sc = file->private_data;
  33 +       unsigned long chan_bw;
  34 +       char buf[32];
  35 +       ssize_t len;
  36 +
  37 +       len = min(count, sizeof(buf) - 1);
  38 +       if (copy_from_user(buf, user_buf, len))
  39 +               return -EFAULT;
  40 +
  41 +       buf[len] = '\0';
  42 +       if (kstrtoul(buf, 0, &chan_bw))
  43 +               return -EINVAL;
  44 +
  45 +       sc->chan_bw = chan_bw;
  46 +       if (!test_bit(SC_OP_INVALID, &sc->sc_flags))
  47 +               ath9k_ops.config(sc->hw, IEEE80211_CONF_CHANGE_CHANNEL);
  48 +
  49 +       return count;
  50 +}
  51 +
  52 +static const struct file_operations fops_chanbw = {
  53 +       .read = read_file_chan_bw,
  54 +       .write = write_file_chan_bw,
  55 +       .open = simple_open,
  56 +       .owner = THIS_MODULE,
  57 +       .llseek = default_llseek,
  58 +};
  59 +
  60 +
  61  int ath9k_init_debug(struct ath_hw *ah)
  62  {
  63         struct ath_common *common = ath9k_hw_common(ah);
  64 @@ -1937,6 +1981,8 @@ int ath9k_init_debug(struct ath_hw *ah)
  65
  66         debugfs_create_file("eeprom", S_IRUSR, sc->debug.debugfs_phy, sc,
  67                             &fops_eeprom);
  68 +       debugfs_create_file("chanbw", S_IRUSR | S_IWUSR, sc->debug.debugfs_phy,
  69 +                           sc, &fops_chanbw);
  70         debugfs_create_file("dma", S_IRUSR, sc->debug.debugfs_phy, sc,
  71                             &fops_dma);
  72         debugfs_create_file("interrupt", S_IRUSR, sc->debug.debugfs_phy, sc,
  73 --- a/drivers/net/wireless/ath/ath9k/main.c
  74 +++ b/drivers/net/wireless/ath/ath9k/main.c
  75 @@ -1200,8 +1200,10 @@ static int ath9k_config(struct ieee80211
  76
  77         if ((changed & IEEE80211_CONF_CHANGE_CHANNEL) || reset_channel) {
  78                 struct ieee80211_channel *curchan = hw->conf.chandef.chan;
  79 +               struct ath9k_channel *hchan;
  80                 int pos = curchan->hw_value;
  81                 int old_pos = -1;
  82 +               u32 oldflags;
  83                 unsigned long flags;
  84
  85                 if (ah->curchan)
  86 @@ -1238,7 +1240,23 @@ static int ath9k_config(struct ieee80211
  87                         memset(&sc->survey[pos], 0, sizeof(struct survey_info));
  88                 }
  89
  90 -               if (ath_set_channel(sc, hw, &sc->sc_ah->channels[pos]) < 0) {
  91 +               hchan = &sc->sc_ah->channels[pos];
  92 +               oldflags = hchan->channelFlags;
  93 +               switch (sc->chan_bw) {
  94 +               case 5:
  95 +                       hchan->channelFlags &= ~CHANNEL_HALF;
  96 +                       hchan->channelFlags |= CHANNEL_QUARTER;
  97 +                       break;
  98 +               case 10:
  99 +                       hchan->channelFlags &= ~CHANNEL_QUARTER;
 100 +                       hchan->channelFlags |= CHANNEL_HALF;
 101 +                       break;
 102 +               default:
 103 +                       hchan->channelFlags &= ~(CHANNEL_HALF | CHANNEL_QUARTER);
 104 +                       break;
 105 +               }
 106 +
 107 +               if (ath_set_channel(sc, hw, hchan) < 0) {
 108                         ath_err(common, "Unable to set channel\n");
 109                         mutex_unlock(&sc->mutex);
 110                         ath9k_ps_restore(sc);