wl12xx: add rx_streaming debugfs entry

Allow control over rx_streaming interval and operation mode
(always/only on coex) via debugfs.

e.g.
echo 100 > /debug/ieee80211/phy0/wl12xx/rx_streaming/interval
echo 1 > /debug/ieee80211/phy0/wl12xx/rx_streaming/always

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

1 files changed, 135 insertions, 1 deletions

diff --git a/drivers/net/wireless/wl12xx/debugfs.c b/drivers/net/wireless/wl12xx/debugfs.c
index f1f8df9b6cd7..c3f19463474d 100644
--- a/drivers/net/wireless/wl12xx/debugfs.c
+++ b/drivers/net/wireless/wl12xx/debugfs.c
@@ -71,6 +71,14 @@ static const struct file_operations name## _ops = {			\
         if (!entry || IS_ERR(entry))                                    \
                 goto err;                                               \
 
+#define DEBUGFS_ADD_PREFIX(prefix, name, parent)                        \
+        do {                                                            \
+                entry = debugfs_create_file(#name, 0400, parent,        \
+                                    wl, &prefix## _## name## _ops);     \
+                if (!entry || IS_ERR(entry))                            \
+                        goto err;                                       \
+        } while (0);
+
 #define DEBUGFS_FWSTATS_FILE(sub, name, fmt)                            \
 static ssize_t sub## _ ##name## _read(struct file *file,                \
                                       char __user *userbuf,             \
@@ -527,11 +535,129 @@ static const struct file_operations beacon_interval_ops = {
         .llseek = default_llseek,
 };
 
+static ssize_t rx_streaming_interval_write(struct file *file,
+                           const char __user *user_buf,
+                           size_t count, loff_t *ppos)
+{
+        struct wl1271 *wl = file->private_data;
+        char buf[10];
+        size_t len;
+        unsigned long value;
+        int ret;
+
+        len = min(count, sizeof(buf) - 1);
+        if (copy_from_user(buf, user_buf, len))
+                return -EFAULT;
+        buf[len] = '\0';
+
+        ret = kstrtoul(buf, 0, &value);
+        if (ret < 0) {
+                wl1271_warning("illegal value in rx_streaming_interval!");
+                return -EINVAL;
+        }
+
+        /* valid values: 0, 10-100 */
+        if (value && (value < 10 || value > 100)) {
+                wl1271_warning("value is not in range!");
+                return -ERANGE;
+        }
+
+        mutex_lock(&wl->mutex);
+
+        wl->conf.rx_streaming.interval = value;
+
+        ret = wl1271_ps_elp_wakeup(wl);
+        if (ret < 0)
+                goto out;
+
+        wl1271_recalc_rx_streaming(wl);
+
+        wl1271_ps_elp_sleep(wl);
+out:
+        mutex_unlock(&wl->mutex);
+        return count;
+}
+
+static ssize_t rx_streaming_interval_read(struct file *file,
+                            char __user *userbuf,
+                            size_t count, loff_t *ppos)
+{
+        struct wl1271 *wl = file->private_data;
+        return wl1271_format_buffer(userbuf, count, ppos,
+                                    "%d\n", wl->conf.rx_streaming.interval);
+}
+
+static const struct file_operations rx_streaming_interval_ops = {
+        .read = rx_streaming_interval_read,
+        .write = rx_streaming_interval_write,
+        .open = wl1271_open_file_generic,
+        .llseek = default_llseek,
+};
+
+static ssize_t rx_streaming_always_write(struct file *file,
+                           const char __user *user_buf,
+                           size_t count, loff_t *ppos)
+{
+        struct wl1271 *wl = file->private_data;
+        char buf[10];
+        size_t len;
+        unsigned long value;
+        int ret;
+
+        len = min(count, sizeof(buf) - 1);
+        if (copy_from_user(buf, user_buf, len))
+                return -EFAULT;
+        buf[len] = '\0';
+
+        ret = kstrtoul(buf, 0, &value);
+        if (ret < 0) {
+                wl1271_warning("illegal value in rx_streaming_write!");
+                return -EINVAL;
+        }
+
+        /* valid values: 0, 10-100 */
+        if (!(value == 0 || value == 1)) {
+                wl1271_warning("value is not in valid!");
+                return -EINVAL;
+        }
+
+        mutex_lock(&wl->mutex);
+
+        wl->conf.rx_streaming.always = value;
+
+        ret = wl1271_ps_elp_wakeup(wl);
+        if (ret < 0)
+                goto out;
+
+        wl1271_recalc_rx_streaming(wl);
+
+        wl1271_ps_elp_sleep(wl);
+out:
+        mutex_unlock(&wl->mutex);
+        return count;
+}
+
+static ssize_t rx_streaming_always_read(struct file *file,
+                            char __user *userbuf,
+                            size_t count, loff_t *ppos)
+{
+        struct wl1271 *wl = file->private_data;
+        return wl1271_format_buffer(userbuf, count, ppos,
+                                    "%d\n", wl->conf.rx_streaming.always);
+}
+
+static const struct file_operations rx_streaming_always_ops = {
+        .read = rx_streaming_always_read,
+        .write = rx_streaming_always_write,
+        .open = wl1271_open_file_generic,
+        .llseek = default_llseek,
+};
+
 static int wl1271_debugfs_add_files(struct wl1271 *wl,
                                      struct dentry *rootdir)
 {
         int ret = 0;
-        struct dentry *entry, *stats;
+        struct dentry *entry, *stats, *streaming;
 
         stats = debugfs_create_dir("fw-statistics", rootdir);
         if (!stats || IS_ERR(stats)) {
@@ -640,6 +766,14 @@ static int wl1271_debugfs_add_files(struct wl1271 *wl,
         DEBUGFS_ADD(dtim_interval, rootdir);
         DEBUGFS_ADD(beacon_interval, rootdir);
 
+        streaming = debugfs_create_dir("rx_streaming", rootdir);
+        if (!streaming || IS_ERR(streaming))
+                goto err;
+
+        DEBUGFS_ADD_PREFIX(rx_streaming, interval, streaming);
+        DEBUGFS_ADD_PREFIX(rx_streaming, always, streaming);
+
+
         return 0;
 
 err: