iw: Add support for antenna configuration commands

Patch from: kentarou matsuyama <matsuyama@thinktube.com>

SVN-Revision: 25106

package/iw/patches/401-antenna.patch

@@ -0,0 +1,82 @@
+iw: Add antenna configuration commands
+
+From: Bruno Randolf <br1@einfach.org>
+
+Add command to set the antenna configuration (iw phyX set antenna ...) and
+include antenna setting in wiphy information (iw phyX info).
+
+iw phyX set antenna all | <bitmap> | <tx bitmap> <rx bitmap>
+
+Signed-off-by: Bruno Randolf <br1@einfach.org>
+
+v8:  Simplfied option parser as requested.
+---
+ info.c |    7 +++++++
+ phy.c  |   39 +++++++++++++++++++++++++++++++++++++++
+ 2 files changed, 46 insertions(+), 0 deletions(-)
+
+diff --git a/info.c b/info.c
+index ce85514..75cadf0 100644
+--- a/info.c
++++ b/info.c
+@@ -168,6 +168,13 @@ static int print_phy_handler(struct nl_msg *msg, void *arg)
+ 		printf("\tCoverage class: %d (up to %dm)\n", coverage, 450 * coverage);
+ 	}
+ 
++	if (tb_msg[NL80211_ATTR_WIPHY_ANTENNA_TX] &&
++	    tb_msg[NL80211_ATTR_WIPHY_ANTENNA_RX]) {
++		printf("\tAntenna: TX %#x RX %#x\n",
++		       nla_get_u32(tb_msg[NL80211_ATTR_WIPHY_ANTENNA_TX]),
++		       nla_get_u32(tb_msg[NL80211_ATTR_WIPHY_ANTENNA_RX]));
++	}
++
+ 	if (tb_msg[NL80211_ATTR_SUPPORTED_IFTYPES]) {
+ 		printf("\tSupported interface modes:\n");
+ 		nla_for_each_nested(nl_mode, tb_msg[NL80211_ATTR_SUPPORTED_IFTYPES], rem_mode)
+diff --git a/phy.c b/phy.c
+index 7c6c7c8..e3bd4e8 100644
+--- a/phy.c
++++ b/phy.c
+@@ -307,3 +307,42 @@ COMMAND(set, txpower, "<auto|fixed|limit> [<tx power in mBm>]",
+ COMMAND(set, txpower, "<auto|fixed|limit> [<tx power in mBm>]",
+ 	NL80211_CMD_SET_WIPHY, 0, CIB_NETDEV, handle_txpower,
+ 	"Specify transmit power level and setting type.");
++
++static int handle_antenna(struct nl80211_state *state,
++			  struct nl_cb *cb,
++			  struct nl_msg *msg,
++			  int argc, char **argv)
++{
++	char *end;
++	uint32_t tx_ant = 0, rx_ant = 0;
++
++	if (argc == 1 && strcmp(argv[0], "all") == 0) {
++		tx_ant = 0xffffffff;
++		rx_ant = 0xffffffff;
++	} else if (argc == 1) {
++		tx_ant = rx_ant = strtoul(argv[0], &end, 0);
++		if (*end)
++			return 1;
++	}
++	else if (argc == 2) {
++		tx_ant = strtoul(argv[0], &end, 0);
++		if (*end)
++			return 1;
++		rx_ant = strtoul(argv[1], &end, 0);
++		if (*end)
++			return 1;
++	} else
++		return 1;
++
++	NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_ANTENNA_TX, tx_ant);
++	NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_ANTENNA_RX, rx_ant);
++
++	return 0;
++
++ nla_put_failure:
++	return -ENOBUFS;
++}
++COMMAND(set, antenna, "<bitmap> | all | <tx bitmap> <rx bitmap>",
++	NL80211_CMD_SET_WIPHY, 0, CIB_PHY, handle_antenna,
++	"Set a bitmap of allowed antennas to use for TX and RX.\n"
++	"The driver may reject antenna configurations it cannot support.");