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>

diff --git a/drivers/net/wireless/wl12xx/debugfs.c b/drivers/net/wireless/wl12xx/debugfs.c
index 4dcb3f7..15353fa 100644 (file)
--- 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);