wifi: introduce wifi_fst module

New wifi_fst module is responsible for:
1. insmod/rmmod of 2nd Wifi driver used for Fast Session Transfer (FST)
rate upgrade.
2. start/stop FST Manager service.

wifi_fst functionality is controlled by system property
persist.fst.rate.upgrade.en.

Existing module wifi.c calls into wifi_fst upon wifi_load/unload_driver
and upon start/stop supplicant

Change-Id: I8b4eddf26ab345b9e1e60e4850eaa081f8b89641

2 files changed, 42 insertions, 108 deletions

diff --git a/include/hardware_legacy/wifi.h b/include/hardware_legacy/wifi.h
index a60718d..e4aa93c 100644
--- a/include/hardware_legacy/wifi.h
+++ b/include/hardware_legacy/wifi.h
@@ -22,6 +22,20 @@ extern "C" {
 #endif
 
 /**
+ * Load kernel module
+ *
+ * @return 0 on success, < 0 on failure.
+ */
+int insmod(const char *filename, const char *args);
+
+/**
+* Unload kernel module
+*
+* @return 0 on success, < 0 on failure.
+*/
+int rmmod(const char *modname);
+
+/**
  * Load the Wi-Fi driver.
  *
  * @return 0 on success, < 0 on failure.
diff --git a/include/hardware_legacy/wifi_fst.h b/include/hardware_legacy/wifi_fst.h
index a60718d..952f132 100644
--- a/include/hardware_legacy/wifi_fst.h
+++ b/include/hardware_legacy/wifi_fst.h
@@ -1,4 +1,7 @@
 /*
+ * Copyright (c) 2015, The Linux Foundation. All rights reserved.
+ *
+ * Not a Contribution.
  * Copyright (C) 2008 The Android Open Source Project
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
@@ -14,149 +17,66 @@
  * limitations under the License.
  */
 
-#ifndef _WIFI_H
-#define _WIFI_H
+#ifndef _WIFI_FST_H
+#define _WIFI_FST_H
 
 #if __cplusplus
 extern "C" {
 #endif
 
 /**
- * Load the Wi-Fi driver.
+ * returns whether FST is enabled or not according to
+ * persist.fst.rate.upgrade.en system property
  *
- * @return 0 on success, < 0 on failure.
+ * @return 1 if FST enabled.
  */
-int wifi_load_driver();
+int is_fst_enabled();
 
 /**
- * Unload the Wi-Fi driver.
- *
- * @return 0 on success, < 0 on failure.
- */
-int wifi_unload_driver();
-
-/**
- * Check if the Wi-Fi driver is loaded.
- * Check if the Wi-Fi driver is loaded.
-
- * @return 0 on success, < 0 on failure.
- */
-int is_wifi_driver_loaded();
-
+* returns whether FST Soft AP is enabled or not according to
+* persist.fst.softap.en system property
+*
+* @return 1 if FST Soft AP enabled.
+*/
+int is_fst_softap_enabled();
 
 /**
- * Start supplicant.
+ * Load the Wi-Fi driver for FST rate upgrade.
  *
  * @return 0 on success, < 0 on failure.
  */
-int wifi_start_supplicant(int p2pSupported);
+int wifi_fst_load_driver();
 
 /**
- * Stop supplicant.
+ * Unload the Wi-Fi driver for FST rate upgrade.
  *
  * @return 0 on success, < 0 on failure.
  */
-int wifi_stop_supplicant(int p2pSupported);
+int wifi_fst_unload_driver();
 
 /**
- * Open a connection to supplicant
- *
- * @return 0 on success, < 0 on failure.
- */
-int wifi_connect_to_supplicant();
+ * Check if the Wi-Fi driver for FST rate upgrade is loaded.
 
-/**
- * Close connection to supplicant
- *
  * @return 0 on success, < 0 on failure.
  */
-void wifi_close_supplicant_connection();
-
-/**
- * wifi_wait_for_event() performs a blocking call to 
- * get a Wi-Fi event and returns a string representing 
- * a Wi-Fi event when it occurs.
- *
- * @param buf is the buffer that receives the event
- * @param len is the maximum length of the buffer
- *
- * @returns number of bytes in buffer, 0 if no
- * event (for instance, no connection), and less than 0
- * if there is an error.
- */
-int wifi_wait_for_event(char *buf, size_t len);
+int is_fst_driver_loaded();
 
 /**
- * wifi_command() issues a command to the Wi-Fi driver.
+ * Start FST Manager.
  *
- * Android extends the standard commands listed at
- * /link http://hostap.epitest.fi/wpa_supplicant/devel/ctrl_iface_page.html
- * to include support for sending commands to the driver:
- *
- * See wifi/java/android/net/wifi/WifiNative.java for the details of
- * driver commands that are supported
- *
- * @param command is the string command (preallocated with 32 bytes)
- * @param commandlen is command buffer length
- * @param reply is a buffer to receive a reply string
- * @param reply_len on entry, this is the maximum length of
- *        the reply buffer. On exit, the number of
- *        bytes in the reply buffer.
- *
- * @return 0 if successful, < 0 if an error.
+ * @return 0 on success, < 0 on failure.
  */
-int wifi_command(const char *command, char *reply, size_t *reply_len);
+int wifi_start_fstman(int softap_mode);
 
 /**
- * do_dhcp_request() issues a dhcp request and returns the acquired
- * information. 
- * 
- * All IPV4 addresses/mask are in network byte order.
- *
- * @param ipaddr return the assigned IPV4 address
- * @param gateway return the gateway being used
- * @param mask return the IPV4 mask
- * @param dns1 return the IPV4 address of a DNS server
- * @param dns2 return the IPV4 address of a DNS server
- * @param server return the IPV4 address of DHCP server
- * @param lease return the length of lease in seconds.
+ * Stop FST Manager.
  *
- * @return 0 if successful, < 0 if error.
- */
-int do_dhcp_request(int *ipaddr, int *gateway, int *mask,
-                   int *dns1, int *dns2, int *server, int *lease);
-
-/**
- * Return the error string of the last do_dhcp_request().
- */
-const char *get_dhcp_error_string();
-
-/**
- * Return the path to requested firmware
- */
-#define WIFI_GET_FW_PATH_STA	0
-#define WIFI_GET_FW_PATH_AP	1
-#define WIFI_GET_FW_PATH_P2P	2
-const char *wifi_get_fw_path(int fw_type);
-
-/**
- * Change the path to firmware for the wlan driver
- */
-int wifi_change_fw_path(const char *fwpath);
-
-/**
- * Check and create if necessary initial entropy file
+ * @return 0 on success, < 0 on failure.
  */
-#define WIFI_ENTROPY_FILE	"/data/misc/wifi/entropy.bin"
-int ensure_entropy_file_exists();
-
-/**
-* Check and create if necessary the desired configuration file
-*/
-int ensure_config_file_exists(const char *config_file, const char *config_file_template);
+int wifi_stop_fstman(int softap_mode);
 
 #if __cplusplus
 };  // extern "C"
 #endif
 
-#endif  // _WIFI_H
+#endif  // _WIFI_FST_H