package/mac80211/patches/520-ath9k_debugfs_regaccess.patch

   1 --- a/drivers/net/wireless/ath/ath9k/debug.c
   2 +++ b/drivers/net/wireless/ath/ath9k/debug.c
   3 @@ -638,6 +638,86 @@ static const struct file_operations fops
   4         .owner = THIS_MODULE
   5  };
   6
   7 +static ssize_t read_file_regidx(struct file *file, char __user *user_buf,
   8 +                                size_t count, loff_t *ppos)
   9 +{
  10 +       struct ath_softc *sc = file->private_data;
  11 +       char buf[32];
  12 +       unsigned int len;
  13 +
  14 +       len = snprintf(buf, sizeof(buf), "0x%08x\n", sc->debug.regidx);
  15 +       return simple_read_from_buffer(user_buf, count, ppos, buf, len);
  16 +}
  17 +
  18 +static ssize_t write_file_regidx(struct file *file, const char __user *user_buf,
  19 +                            size_t count, loff_t *ppos)
  20 +{
  21 +       struct ath_softc *sc = file->private_data;
  22 +       unsigned long regidx;
  23 +       char buf[32];
  24 +       ssize_t len;
  25 +
  26 +       len = min(count, sizeof(buf) - 1);
  27 +       if (copy_from_user(buf, user_buf, len))
  28 +               return -EINVAL;
  29 +
  30 +       buf[len] = '\0';
  31 +       if (strict_strtoul(buf, 0, &regidx))
  32 +               return -EINVAL;
  33 +
  34 +       sc->debug.regidx = regidx;
  35 +       return count;
  36 +}
  37 +
  38 +static const struct file_operations fops_regidx = {
  39 +       .read = read_file_regidx,
  40 +       .write = write_file_regidx,
  41 +       .open = ath9k_debugfs_open,
  42 +       .owner = THIS_MODULE
  43 +};
  44 +
  45 +static ssize_t read_file_regval(struct file *file, char __user *user_buf,
  46 +                            size_t count, loff_t *ppos)
  47 +{
  48 +       struct ath_softc *sc = file->private_data;
  49 +       struct ath_hw *ah = sc->sc_ah;
  50 +       char buf[32];
  51 +       unsigned int len;
  52 +       u32 regval;
  53 +
  54 +       regval = REG_READ_D(ah, sc->debug.regidx);
  55 +       len = snprintf(buf, sizeof(buf), "0x%08x\n", regval);
  56 +       return simple_read_from_buffer(user_buf, count, ppos, buf, len);
  57 +}
  58 +
  59 +static ssize_t write_file_regval(struct file *file, const char __user *user_buf,
  60 +                            size_t count, loff_t *ppos)
  61 +{
  62 +       struct ath_softc *sc = file->private_data;
  63 +       struct ath_hw *ah = sc->sc_ah;
  64 +       unsigned long regval;
  65 +       char buf[32];
  66 +       ssize_t len;
  67 +
  68 +       len = min(count, sizeof(buf) - 1);
  69 +       if (copy_from_user(buf, user_buf, len))
  70 +               return -EINVAL;
  71 +
  72 +       buf[len] = '\0';
  73 +       if (strict_strtoul(buf, 0, &regval))
  74 +               return -EINVAL;
  75 +
  76 +       REG_WRITE_D(ah, sc->debug.regidx, regval);
  77 +       return count;
  78 +}
  79 +
  80 +static const struct file_operations fops_regval = {
  81 +       .read = read_file_regval,
  82 +       .write = write_file_regval,
  83 +       .open = ath9k_debugfs_open,
  84 +       .owner = THIS_MODULE
  85 +};
  86 +
  87  int ath9k_init_debug(struct ath_hw *ah)
  88  {
  89         struct ath_common *common = ath9k_hw_common(ah);
  90 @@ -700,6 +780,17 @@ int ath9k_init_debug(struct ath_hw *ah)
  91         if (!sc->debug.debugfs_xmit)
  92                 goto err;
  93
  94 +       sc->debug.regidx = 0;
  95 +       sc->debug.debugfs_regidx = debugfs_create_file("regidx",
  96 +                       S_IRUSR|S_IWUSR, sc->debug.debugfs_phy, sc, &fops_regidx);
  97 +       if (!sc->debug.debugfs_regidx)
  98 +               goto err;
  99 +
 100 +       sc->debug.debugfs_regval = debugfs_create_file("regval",
 101 +                       S_IRUSR|S_IWUSR, sc->debug.debugfs_phy, sc, &fops_regval);
 102 +       if (!sc->debug.debugfs_regval)
 103 +               goto err;
 104 +
 105         return 0;
 106  err:
 107         ath9k_exit_debug(ah);
 108 @@ -713,6 +804,8 @@ void ath9k_exit_debug(struct ath_hw *ah)
 109
 110         debugfs_remove(sc->debug.debugfs_tx_chainmask);
 111         debugfs_remove(sc->debug.debugfs_rx_chainmask);
 112 +       debugfs_remove(sc->debug.debugfs_regval);
 113 +       debugfs_remove(sc->debug.debugfs_regidx);
 114         debugfs_remove(sc->debug.debugfs_xmit);
 115         debugfs_remove(sc->debug.debugfs_wiphy);
 116         debugfs_remove(sc->debug.debugfs_rcstat);
 117 --- a/drivers/net/wireless/ath/ath9k/debug.h
 118 +++ b/drivers/net/wireless/ath/ath9k/debug.h
 119 @@ -132,6 +132,9 @@ struct ath9k_debug {
 120         struct dentry *debugfs_rcstat;
 121         struct dentry *debugfs_wiphy;
 122         struct dentry *debugfs_xmit;
 123 +       struct dentry *debugfs_regidx;
 124 +       struct dentry *debugfs_regval;
 125 +       u32 regidx;
 126         struct ath_stats stats;
 127  };
 128