mwifiex: add debugfs file for testing reset of card

This provides an option for user to power cycle the card.
It will be used to change the firmware without actually
rebooting the system.

Signed-off-by: Amitkumar Karwar <akarwar@marvell.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>

diff --git a/drivers/net/wireless/marvell/mwifiex/debugfs.c b/drivers/net/wireless/marvell/mwifiex/debugfs.c
index 9824d8dd2b4447f11304557a44f3c7ea2d629d76..5e5562909d9f1edfb3c62e173fac9e6a6b0f3ccc 100644 (file)
--- a/drivers/net/wireless/marvell/mwifiex/debugfs.c
+++ b/drivers/net/wireless/marvell/mwifiex/debugfs.c
@@ -906,6 +906,34 @@ mwifiex_timeshare_coex_write(struct file *file, const char __user *ubuf,
                return count;
 }
 
+static ssize_t
+mwifiex_reset_write(struct file *file,
+                   const char __user *ubuf, size_t count, loff_t *ppos)
+{
+       struct mwifiex_private *priv = file->private_data;
+       struct mwifiex_adapter *adapter = priv->adapter;
+       char cmd;
+       bool result;
+
+       if (copy_from_user(&cmd, ubuf, sizeof(cmd)))
+               return -EFAULT;
+
+       if (strtobool(&cmd, &result))
+               return -EINVAL;
+
+       if (!result)
+               return -EINVAL;
+
+       if (adapter->if_ops.card_reset) {
+               dev_info(adapter->dev, "Resetting per request\n");
+               adapter->hw_status = MWIFIEX_HW_STATUS_RESET;
+               mwifiex_cancel_all_pending_cmd(adapter);
+               adapter->if_ops.card_reset(adapter);
+       }
+
+       return count;
+}
+
 #define MWIFIEX_DFS_ADD_FILE(name) do {                                 \
        if (!debugfs_create_file(#name, 0644, priv->dfs_dev_dir,        \
                        priv, &mwifiex_dfs_##name##_fops))              \
@@ -943,6 +971,7 @@ MWIFIEX_DFS_FILE_OPS(hscfg);
 MWIFIEX_DFS_FILE_OPS(histogram);
 MWIFIEX_DFS_FILE_OPS(debug_mask);
 MWIFIEX_DFS_FILE_OPS(timeshare_coex);
+MWIFIEX_DFS_FILE_WRITE_OPS(reset);
 
 /*
  * This function creates the debug FS directory structure and the files.
@@ -970,6 +999,7 @@ mwifiex_dev_debugfs_init(struct mwifiex_private *priv)
        MWIFIEX_DFS_ADD_FILE(histogram);
        MWIFIEX_DFS_ADD_FILE(debug_mask);
        MWIFIEX_DFS_ADD_FILE(timeshare_coex);
+       MWIFIEX_DFS_ADD_FILE(reset);
 }
 
 /*