wl12xx: add forced_ps debugfs file

Added control over forced_ps option through debugfs.
This can be either 1 or 0.

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, 70 insertions, 0 deletions

diff --git a/drivers/net/wireless/wl12xx/debugfs.c b/drivers/net/wireless/wl12xx/debugfs.c
index 02da445ea98a..1c2623850eae 100644
--- a/drivers/net/wireless/wl12xx/debugfs.c
+++ b/drivers/net/wireless/wl12xx/debugfs.c
@@ -376,6 +376,75 @@ static const struct file_operations dynamic_ps_timeout_ops = {
         .llseek = default_llseek,
 };
 
+static ssize_t forced_ps_read(struct file *file, char __user *user_buf,
+                          size_t count, loff_t *ppos)
+{
+        struct wl1271 *wl = file->private_data;
+
+        return wl1271_format_buffer(user_buf, count,
+                                    ppos, "%d\n",
+                                    wl->conf.conn.forced_ps);
+}
+
+static ssize_t forced_ps_write(struct file *file,
+                                    const char __user *user_buf,
+                                    size_t count, loff_t *ppos)
+{
+        struct wl1271 *wl = file->private_data;
+        struct wl12xx_vif *wlvif;
+        unsigned long value;
+        int ret, ps_mode;
+
+        ret = kstrtoul_from_user(user_buf, count, 10, &value);
+        if (ret < 0) {
+                wl1271_warning("illegal value in forced_ps");
+                return -EINVAL;
+        }
+
+        if (value != 1 && value != 0) {
+                wl1271_warning("forced_ps should be either 0 or 1");
+                return -ERANGE;
+        }
+
+        mutex_lock(&wl->mutex);
+
+        if (wl->conf.conn.forced_ps == value)
+                goto out;
+
+        wl->conf.conn.forced_ps = value;
+
+        if (wl->state == WL1271_STATE_OFF)
+                goto out;
+
+        ret = wl1271_ps_elp_wakeup(wl);
+        if (ret < 0)
+                goto out;
+
+        /* In case we're already in PSM, trigger it again to switch mode
+         * immediately without waiting for re-association
+         */
+
+        ps_mode = value ? STATION_POWER_SAVE_MODE : STATION_AUTO_PS_MODE;
+
+        wl12xx_for_each_wlvif_sta(wl, wlvif) {
+                if (test_bit(WLVIF_FLAG_IN_PS, &wlvif->flags))
+                        wl1271_ps_set_mode(wl, wlvif, ps_mode);
+        }
+
+        wl1271_ps_elp_sleep(wl);
+
+out:
+        mutex_unlock(&wl->mutex);
+        return count;
+}
+
+static const struct file_operations forced_ps_ops = {
+        .read = forced_ps_read,
+        .write = forced_ps_write,
+        .open = wl1271_open_file_generic,
+        .llseek = default_llseek,
+};
+
 static ssize_t driver_state_read(struct file *file, char __user *user_buf,
                                  size_t count, loff_t *ppos)
 {
@@ -1011,6 +1080,7 @@ static int wl1271_debugfs_add_files(struct wl1271 *wl,
         DEBUGFS_ADD(beacon_interval, rootdir);
         DEBUGFS_ADD(beacon_filtering, rootdir);
         DEBUGFS_ADD(dynamic_ps_timeout, rootdir);
+        DEBUGFS_ADD(forced_ps, rootdir);
 
         streaming = debugfs_create_dir("rx_streaming", rootdir);
         if (!streaming || IS_ERR(streaming))