1 files changed, 16 insertions, 1 deletions

diff --git a/drivers/net/wireless/rt2x00/rt73usb.h b/drivers/net/wireless/rt2x00/rt73usb.h
index da62b4f091a7..3f9675655eb9 100644
--- a/drivers/net/wireless/rt2x00/rt73usb.h
+++ b/drivers/net/wireless/rt2x00/rt73usb.h
@@ -114,6 +114,9 @@ struct hw_pairwise_ta_entry {
 #define HW_BEACON_BASE2                 0x2600
 #define HW_BEACON_BASE3                 0x2700
 
+#define HW_BEACON_OFFSET(__index) \
+        ( HW_BEACON_BASE0 + (__index * 0x0100) )
+
 /*
  * MAC Control/Status Registers(CSR).
  * Some values are set in TU, whereas 1 TU == 1024 us.
@@ -146,6 +149,11 @@ struct hw_pairwise_ta_entry {
 
 /*
  * MAC_CSR3: STA MAC register 1.
+ * UNICAST_TO_ME_MASK:
+ *      Used to mask off bits from byte 5 of the MAC address
+ *      to determine the UNICAST_TO_ME bit for RX frames.
+ *      The full mask is complemented by BSS_ID_MASK:
+ *              MASK = BSS_ID_MASK & UNICAST_TO_ME_MASK
  */
 #define MAC_CSR3                        0x300c
 #define MAC_CSR3_BYTE4                  FIELD32(0x000000ff)
@@ -163,7 +171,14 @@ struct hw_pairwise_ta_entry {
 
 /*
  * MAC_CSR5: BSSID register 1.
- * BSS_ID_MASK: 3: one BSSID, 0: 4 BSSID, 2 or 1: 2 BSSID.
+ * BSS_ID_MASK:
+ *      This mask is used to mask off bits 0 and 1 of byte 5 of the
+ *      BSSID. This will make sure that those bits will be ignored
+ *      when determining the MY_BSS of RX frames.
+ *              0: 1-BSSID mode (BSS index = 0)
+ *              1: 2-BSSID mode (BSS index: Byte5, bit 0)
+ *              2: 2-BSSID mode (BSS index: byte5, bit 1)
+ *              3: 4-BSSID mode (BSS index: byte5, bit 0 - 1)
  */
 #define MAC_CSR5                        0x3014
 #define MAC_CSR5_BYTE4                  FIELD32(0x000000ff)