rsi: Add support for antenna selection

RSI 9113 device supports single antenna for tx and rx. Support for using
external is added. This can be configured from user space using iw.

Signed-off-by: Prameela Rani Garnepudi <prameela.j04cs@gmail.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>

drivers/net/wireless/rsi/rsi_mgmt.h

@@ -141,6 +141,9 @@
 #define RSI_SUPP_FILTERS	(FIF_ALLMULTI | FIF_PROBE_REQ |\
 				 FIF_BCN_PRBRESP_PROMISC)
 
+#define ANTENNA_SEL_INT			0x02 /* RF_OUT_2 / Integerated */
+#define ANTENNA_SEL_UFL			0x03 /* RF_OUT_1 / U.FL */
+
 /* Rx filter word definitions */
 #define PROMISCOUS_MODE			BIT(0)
 #define ALLOW_DATA_ASSOC_PEER		BIT(1)
@@ -201,6 +204,7 @@ enum cmd_frame_type {
 	BG_SCAN_PROBE_REQ,
 	CW_MODE_REQ,
 	PER_CMD_PKT,
+	ANT_SEL_FRAME = 0x20,
 	RADIO_PARAMS_UPDATE = 0x29
 };
 
@@ -326,4 +330,5 @@ int rsi_send_data_pkt(struct rsi_common *common, struct sk_buff *skb);
 int rsi_band_check(struct rsi_common *common);
 int rsi_send_rx_filter_frame(struct rsi_common *common, u16 rx_filter_word);
 int rsi_send_radio_params_update(struct rsi_common *common);
+int rsi_set_antenna(struct rsi_common *common, u8 antenna);
 #endif