ath9k: Add a debug entry to start/stop ANI

this helps the user to start/stop ANI dynamically.

Signed-off-by: Mohammed Shafi Shajakhan <mshajakhan@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 52 insertions, 0 deletions

diff --git a/drivers/net/wireless/ath/ath9k/debug.c b/drivers/net/wireless/ath/ath9k/debug.c
index 202399d4fe1..7230d6578b1 100644
--- a/drivers/net/wireless/ath/ath9k/debug.c
+++ b/drivers/net/wireless/ath/ath9k/debug.c
@@ -176,6 +176,56 @@ static const struct file_operations fops_rx_chainmask = {
         .llseek = default_llseek,
 };
 
+static ssize_t read_file_disable_ani(struct file *file, char __user *user_buf,
+                             size_t count, loff_t *ppos)
+{
+        struct ath_softc *sc = file->private_data;
+        struct ath_common *common = ath9k_hw_common(sc->sc_ah);
+        char buf[32];
+        unsigned int len;
+
+        len = sprintf(buf, "%d\n", common->disable_ani);
+        return simple_read_from_buffer(user_buf, count, ppos, buf, len);
+}
+
+static ssize_t write_file_disable_ani(struct file *file,
+                                      const char __user *user_buf,
+                                      size_t count, loff_t *ppos)
+{
+        struct ath_softc *sc = file->private_data;
+        struct ath_common *common = ath9k_hw_common(sc->sc_ah);
+        unsigned long disable_ani;
+        char buf[32];
+        ssize_t len;
+
+        len = min(count, sizeof(buf) - 1);
+        if (copy_from_user(buf, user_buf, len))
+                return -EFAULT;
+
+        buf[len] = '\0';
+        if (strict_strtoul(buf, 0, &disable_ani))
+                return -EINVAL;
+
+        common->disable_ani = !!disable_ani;
+
+        if (disable_ani) {
+                sc->sc_flags &= ~SC_OP_ANI_RUN;
+                del_timer_sync(&common->ani.timer);
+        } else {
+                sc->sc_flags |= SC_OP_ANI_RUN;
+                ath_start_ani(common);
+        }
+
+        return count;
+}
+
+static const struct file_operations fops_disable_ani = {
+        .read = read_file_disable_ani,
+        .write = write_file_disable_ani,
+        .open = ath9k_debugfs_open,
+        .owner = THIS_MODULE,
+        .llseek = default_llseek,
+};
 
 static ssize_t read_file_dma(struct file *file, char __user *user_buf,
                              size_t count, loff_t *ppos)
@@ -1159,6 +1209,8 @@ int ath9k_init_debug(struct ath_hw *ah)
                             sc->debug.debugfs_phy, sc, &fops_rx_chainmask);
         debugfs_create_file("tx_chainmask", S_IRUSR | S_IWUSR,
                             sc->debug.debugfs_phy, sc, &fops_tx_chainmask);
+        debugfs_create_file("disable_ani", S_IRUSR | S_IWUSR,
+                            sc->debug.debugfs_phy, sc, &fops_disable_ani);
         debugfs_create_file("regidx", S_IRUSR | S_IWUSR, sc->debug.debugfs_phy,
                             sc, &fops_regidx);
         debugfs_create_file("regval", S_IRUSR | S_IWUSR, sc->debug.debugfs_phy,