staging: brcm80211: clarified fullmac io and event codes

Added comments to make code more readable.
Reported-by: NJohannes Berg <johannes@sipsolutions.net>
Reviewed-by: NArend van Spriel <arend@broadcom.com>
Reviewed-by: NFranky Lin <frankyl@broadcom.com>
Signed-off-by: NFranky Lin <frankyl@broadcom.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>

drivers/staging/brcm80211/brcmfmac/dhd.h

@@ -27,6 +27,9 @@
 #define BRCMF_C_IOCTL_MEDLEN	1536	/* "med" ioctl buffer required */
 #define	BRCMF_C_IOCTL_MAXLEN	8192
 
+/*******************************************************************************
+ * IO codes that are interpreted by dongle firmware
+ ******************************************************************************/
 #define BRCMF_C_UP				2
 #define BRCMF_C_SET_PROMISC			10
 #define BRCMF_C_GET_RATE			12
@@ -171,6 +174,7 @@ struct dngl_stats {
 	unsigned long multicast;	/* multicast packets received */
 };
 
+/* event codes sent by the dongle to this driver */
 #define BRCMF_E_SET_SSID			0
 #define BRCMF_E_JOIN				1
 #define BRCMF_E_START				2

drivers/staging/brcm80211/brcmfmac/dhd_cdc.c

@@ -14,6 +14,11 @@
  * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  */
 
+/*******************************************************************************
+ * Communicates with the dongle by using Broadcom specific ioctl codes.
+ * For certain ioctl codes, the dongle interprets string data from the host.
+ ******************************************************************************/
+
 #include <linux/types.h>
 #include <linux/netdevice.h>
 #include <linux/sched.h>

drivers/staging/brcm80211/brcmfmac/wl_cfg80211.c

@@ -14,6 +14,8 @@
  * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  */
 
+/* Toplevel file. Relies on dhd_linux.c to send ioctls to the dongle. */
+
 #include <linux/kernel.h>
 #include <linux/if_arp.h>
 #include <linux/sched.h>