mwifiex: add calibration data download feature

User can provide a text file containing calibration data in hex
format while loading mwifiex module. It will be downloaded to
firmware.
eg. insmod mwifiex.ko cal_data_cfg=cal_data.conf

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, 13 insertions, 0 deletions

diff --git a/drivers/net/wireless/mwifiex/main.c b/drivers/net/wireless/mwifiex/main.c
index eb8518618622..29d83f0c1fb8 100644
--- a/drivers/net/wireless/mwifiex/main.c
+++ b/drivers/net/wireless/mwifiex/main.c
@@ -25,6 +25,8 @@
 #define VERSION "1.0"
 
 const char driver_version[] = "mwifiex " VERSION " (%s) ";
+static char *cal_data_cfg;
+module_param(cal_data_cfg, charp, 0);
 
 /*
  * This function registers the device and performs all the necessary
@@ -336,6 +338,13 @@ static void mwifiex_fw_dpc(const struct firmware *firmware, void *context)
 
         dev_notice(adapter->dev, "WLAN FW is active\n");
 
+        if (cal_data_cfg) {
+                if ((request_firmware(&adapter->cal_data, cal_data_cfg,
+                                      adapter->dev)) < 0)
+                        dev_err(adapter->dev,
+                                "Cal data request_firmware() failed\n");
+        }
+
         adapter->init_wait_q_woken = false;
         ret = mwifiex_init_fw(adapter);
         if (ret == -1) {
@@ -390,6 +399,10 @@ err_init_fw:
         pr_debug("info: %s: unregister device\n", __func__);
         adapter->if_ops.unregister_dev(adapter);
 done:
+        if (adapter->cal_data) {
+                release_firmware(adapter->cal_data);
+                adapter->cal_data = NULL;
+        }
         release_firmware(adapter->firmware);
         complete(&adapter->fw_load);
         return;