rt2x00: Synchronize WCID initialization with legacy driver

Legacy rt2870 driver handles WCID differently then we expected,
the BSSID and Cipher value are 3 bit values, while the 4th bit
should be set elsewhere in an extended field.

After this, rt2800usb reports frames have been decrypted
successfully, indicating that the Hardware decryption now is
working correctly.

Signed-off-by: Ivo van Doorn <IvDoorn@gmail.com>
Acked-by: Gertjan van Wingerde <gwingerde@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

drivers/net/wireless/rt2x00/rt2800.h

@@ -1436,6 +1436,10 @@ struct mac_iveiv_entry {
 #define MAC_WCID_ATTRIBUTE_CIPHER	FIELD32(0x0000000e)
 #define MAC_WCID_ATTRIBUTE_BSS_IDX	FIELD32(0x00000070)
 #define MAC_WCID_ATTRIBUTE_RX_WIUDF	FIELD32(0x00000380)
+#define MAC_WCID_ATTRIBUTE_CIPHER_EXT	FIELD32(0x00000400)
+#define MAC_WCID_ATTRIBUTE_BSS_IDX_EXT	FIELD32(0x00000800)
+#define MAC_WCID_ATTRIBUTE_WAPI_MCBC	FIELD32(0x00008000)
+#define MAC_WCID_ATTRIBUTE_WAPI_KEY_IDX	FIELD32(0xff000000)
 
 /*
  * SHARED_KEY_MODE:

drivers/net/wireless/rt2x00/rt2800lib.c

@@ -554,15 +554,28 @@ static void rt2800_config_wcid_attr(struct rt2x00_dev *rt2x00dev,
 
 	offset = MAC_WCID_ATTR_ENTRY(key->hw_key_idx);
 
-	rt2800_register_read(rt2x00dev, offset, &reg);
-	rt2x00_set_field32(&reg, MAC_WCID_ATTRIBUTE_KEYTAB,
-			   !!(key->flags & IEEE80211_KEY_FLAG_PAIRWISE));
-	rt2x00_set_field32(&reg, MAC_WCID_ATTRIBUTE_CIPHER,
-			   (crypto->cmd == SET_KEY) * crypto->cipher);
-	rt2x00_set_field32(&reg, MAC_WCID_ATTRIBUTE_BSS_IDX,
-			   (crypto->cmd == SET_KEY) * crypto->bssidx);
-	rt2x00_set_field32(&reg, MAC_WCID_ATTRIBUTE_RX_WIUDF, crypto->cipher);
-	rt2800_register_write(rt2x00dev, offset, reg);
+	if (crypto->cmd == SET_KEY) {
+		rt2800_register_read(rt2x00dev, offset, &reg);
+		rt2x00_set_field32(&reg, MAC_WCID_ATTRIBUTE_KEYTAB,
+				   !!(key->flags & IEEE80211_KEY_FLAG_PAIRWISE));
+		/*
+		 * Both the cipher as the BSS Idx numbers are split in a main
+		 * value of 3 bits, and a extended field for adding one additional
+		 * bit to the value.
+		 */
+		rt2x00_set_field32(&reg, MAC_WCID_ATTRIBUTE_CIPHER,
+				   (crypto->cipher & 0x7));
+		rt2x00_set_field32(&reg, MAC_WCID_ATTRIBUTE_CIPHER_EXT,
+				   (crypto->cipher & 0x8) >> 3);
+		rt2x00_set_field32(&reg, MAC_WCID_ATTRIBUTE_BSS_IDX,
+				   (crypto->bssidx & 0x7));
+		rt2x00_set_field32(&reg, MAC_WCID_ATTRIBUTE_BSS_IDX_EXT,
+				   (crypto->bssidx & 0x8) >> 3);
+		rt2x00_set_field32(&reg, MAC_WCID_ATTRIBUTE_RX_WIUDF, crypto->cipher);
+		rt2800_register_write(rt2x00dev, offset, reg);
+	} else {
+		rt2800_register_write(rt2x00dev, offset, 0);
+	}
 
 	offset = MAC_IVEIV_ENTRY(key->hw_key_idx);