ath9k: add debugfs based DFS radar simulation

This helps testing DFS without radar generating
equipment and is required for certification.

Signed-off-by: Simon Wunderlich <siwu@hrz.tu-chemnitz.de>
Signed-off-by: Zefir Kurtisi <zefir.kurtisi@neratec.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 20 insertions, 0 deletions

diff --git a/drivers/net/wireless/ath/ath9k/dfs_debug.c b/drivers/net/wireless/ath/ath9k/dfs_debug.c
index 55d28072adeb..b7611b7bbe43 100644
--- a/drivers/net/wireless/ath/ath9k/dfs_debug.c
+++ b/drivers/net/wireless/ath/ath9k/dfs_debug.c
@@ -105,6 +105,24 @@ static ssize_t write_file_dfs(struct file *file, const char __user *user_buf,
         return count;
 }
 
+static ssize_t write_file_simulate_radar(struct file *file,
+                                         const char __user *user_buf,
+                                         size_t count, loff_t *ppos)
+{
+        struct ath_softc *sc = file->private_data;
+
+        ieee80211_radar_detected(sc->hw);
+
+        return count;
+}
+
+static const struct file_operations fops_simulate_radar = {
+        .write = write_file_simulate_radar,
+        .open = simple_open,
+        .owner = THIS_MODULE,
+        .llseek = default_llseek,
+};
+
 static const struct file_operations fops_dfs_stats = {
         .read = read_file_dfs,
         .write = write_file_dfs,
@@ -117,4 +135,6 @@ void ath9k_dfs_init_debug(struct ath_softc *sc)
 {
         debugfs_create_file("dfs_stats", S_IRUSR,
                             sc->debug.debugfs_phy, sc, &fops_dfs_stats);
+        debugfs_create_file("dfs_simulate_radar", S_IWUSR,
+                            sc->debug.debugfs_phy, sc, &fops_simulate_radar);
 }