wl12xx: add suspend_listen_interval debugfs file

Add read/write to suspend_dtim_interval file which
controls the number of DTIM periods between wakeups
while the host is suspended.
The value while the host is resumed is controlled
by the file dtim_interval which existed previously.

Signed-off-by: Eyal Shapira <eyal@wizery.com>
Signed-off-by: Eliad Peller <eliad@wizery.com>
Signed-off-by: Luciano Coelho <coelho@ti.com>

1 files changed, 59 insertions, 0 deletions

diff --git a/drivers/net/wireless/wl12xx/debugfs.c b/drivers/net/wireless/wl12xx/debugfs.c
index 4dcb3f758fe2..15353fac0707 100644
--- a/drivers/net/wireless/wl12xx/debugfs.c
+++ b/drivers/net/wireless/wl12xx/debugfs.c
@@ -625,6 +625,64 @@ static const struct file_operations dtim_interval_ops = {
         .llseek = default_llseek,
 };
 
+
+
+static ssize_t suspend_dtim_interval_read(struct file *file,
+                                          char __user *user_buf,
+                                          size_t count, loff_t *ppos)
+{
+        struct wl1271 *wl = file->private_data;
+        u8 value;
+
+        if (wl->conf.conn.suspend_wake_up_event == CONF_WAKE_UP_EVENT_DTIM ||
+            wl->conf.conn.suspend_wake_up_event == CONF_WAKE_UP_EVENT_N_DTIM)
+                value = wl->conf.conn.suspend_listen_interval;
+        else
+                value = 0;
+
+        return wl1271_format_buffer(user_buf, count, ppos, "%d\n", value);
+}
+
+static ssize_t suspend_dtim_interval_write(struct file *file,
+                                           const char __user *user_buf,
+                                           size_t count, loff_t *ppos)
+{
+        struct wl1271 *wl = file->private_data;
+        unsigned long value;
+        int ret;
+
+        ret = kstrtoul_from_user(user_buf, count, 10, &value);
+        if (ret < 0) {
+                wl1271_warning("illegal value for suspend_dtim_interval");
+                return -EINVAL;
+        }
+
+        if (value < 1 || value > 10) {
+                wl1271_warning("suspend_dtim value is not in valid range");
+                return -ERANGE;
+        }
+
+        mutex_lock(&wl->mutex);
+
+        wl->conf.conn.suspend_listen_interval = value;
+        /* for some reason there are different event types for 1 and >1 */
+        if (value == 1)
+                wl->conf.conn.suspend_wake_up_event = CONF_WAKE_UP_EVENT_DTIM;
+        else
+                wl->conf.conn.suspend_wake_up_event = CONF_WAKE_UP_EVENT_N_DTIM;
+
+        mutex_unlock(&wl->mutex);
+        return count;
+}
+
+
+static const struct file_operations suspend_dtim_interval_ops = {
+        .read = suspend_dtim_interval_read,
+        .write = suspend_dtim_interval_write,
+        .open = wl1271_open_file_generic,
+        .llseek = default_llseek,
+};
+
 static ssize_t beacon_interval_read(struct file *file, char __user *user_buf,
                                     size_t count, loff_t *ppos)
 {
@@ -949,6 +1007,7 @@ static int wl1271_debugfs_add_files(struct wl1271 *wl,
         DEBUGFS_ADD(driver_state, rootdir);
         DEBUGFS_ADD(vifs_state, rootdir);
         DEBUGFS_ADD(dtim_interval, rootdir);
+        DEBUGFS_ADD(suspend_dtim_interval, rootdir);
         DEBUGFS_ADD(beacon_interval, rootdir);
         DEBUGFS_ADD(beacon_filtering, rootdir);
         DEBUGFS_ADD(dynamic_ps_timeout, rootdir);