mwifiex: add fw_dump debugfs file

This option be useful to dump firmware memory for debugging
purpose. Actual code to dump firmware momory for SDIO and PCIe
chipsets will be added later.

Signed-off-by: Amitkumar Karwar <akarwar@marvell.com>
Signed-off-by: Bing Zhao <bzhao@marvell.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 25 insertions, 0 deletions

diff --git a/drivers/net/wireless/mwifiex/debugfs.c b/drivers/net/wireless/mwifiex/debugfs.c
index b8a49aad12fd..7b419bbcd544 100644
--- a/drivers/net/wireless/mwifiex/debugfs.c
+++ b/drivers/net/wireless/mwifiex/debugfs.c
@@ -257,6 +257,29 @@ free_and_exit:
 }
 
 /*
+ * Proc firmware dump read handler.
+ *
+ * This function is called when the 'fw_dump' file is opened for
+ * reading.
+ * This function dumps firmware memory in different files
+ * (ex. DTCM, ITCM, SQRAM etc.) based on the the segments for
+ * debugging.
+ */
+static ssize_t
+mwifiex_fw_dump_read(struct file *file, char __user *ubuf,
+                     size_t count, loff_t *ppos)
+{
+        struct mwifiex_private *priv = file->private_data;
+
+        if (!priv->adapter->if_ops.fw_dump)
+                return -EIO;
+
+        priv->adapter->if_ops.fw_dump(priv->adapter);
+
+        return 0;
+}
+
+/*
  * Proc getlog file read handler.
  *
  * This function is called when the 'getlog' file is opened for reading
@@ -699,6 +722,7 @@ static const struct file_operations mwifiex_dfs_##name##_fops = {       \
 MWIFIEX_DFS_FILE_READ_OPS(info);
 MWIFIEX_DFS_FILE_READ_OPS(debug);
 MWIFIEX_DFS_FILE_READ_OPS(getlog);
+MWIFIEX_DFS_FILE_READ_OPS(fw_dump);
 MWIFIEX_DFS_FILE_OPS(regrdwr);
 MWIFIEX_DFS_FILE_OPS(rdeeprom);
 
@@ -722,6 +746,7 @@ mwifiex_dev_debugfs_init(struct mwifiex_private *priv)
         MWIFIEX_DFS_ADD_FILE(getlog);
         MWIFIEX_DFS_ADD_FILE(regrdwr);
         MWIFIEX_DFS_ADD_FILE(rdeeprom);
+        MWIFIEX_DFS_ADD_FILE(fw_dump);
 }
 
 /*