1 files changed, 92 insertions, 0 deletions
diff --git a/src/host/trxcon/phy_info.c b/src/host/trxcon/phy_info.c
new file mode 100644
index 00000000..2b73c82d
--- /dev/null
+++ b/src/host/trxcon/phy_info.c
@@ -0,0 +1,92 @@
+/*
+ * L1CTL PHY info / features negotiation
+ *
+ * (C) 2018 by Vadim Yanitskiy <axilirator@gmail.com>
+ *
+ * All Rights Reserved
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ */
+
+#include <errno.h>
+#include <stdint.h>
+
+#include <arpa/inet.h>
+
+#include <osmocom/core/negotiation.h>
+#include <osmocom/core/utils.h>
+#include <osmocom/core/msgb.h>
+
+#include "l1ctl_proto.h"
+
+static const struct value_string phy_info[] = {
+	{L1CTL_PHY_INFO_NAME, "trxcon"},
+	{ 0, NULL }
+};
+
+int trxcon_compose_phy_info(struct msgb *msg)
+{
+	struct l1ctl_phy_nego_ind *hdr;
+	uint8_t *features_tlv;
+	int rc;
+
+	/* Header first */
+	hdr = (struct l1ctl_phy_nego_ind *) msgb_put(msg, sizeof(*hdr));
+	if (!hdr)
+		return -ENOMEM;
+
+	/* Encode basic PHY info */
+	rc = osmo_nego_enc_info(msg, phy_info);
+	if (rc < (ARRAY_SIZE(phy_info) - 1))
+		return -EINVAL;
+
+	/* PHY features TLV, length will be set latter */
+	features_tlv = msgb_put(msg, 2);
+	if (!features_tlv)
+		return -ENOMEM;
+
+	/* Frequency band support */
+	osmo_nego_add_feature(msg, L1CTL_PHY_FEATURE_BAND_400);
+	osmo_nego_add_feature(msg, L1CTL_PHY_FEATURE_BAND_850);
+	osmo_nego_add_feature(msg, L1CTL_PHY_FEATURE_BAND_900);
+	osmo_nego_add_feature(msg, L1CTL_PHY_FEATURE_BAND_DCS);
+	osmo_nego_add_feature(msg, L1CTL_PHY_FEATURE_BAND_PCS);
+
+	/* Channel coding support */
+	osmo_nego_add_feature(msg, L1CTL_PHY_FEATURE_CHAN_XCCH);
+	osmo_nego_add_feature(msg, L1CTL_PHY_FEATURE_CHAN_TCHF);
+
+	/* Voice codecs support */
+	osmo_nego_add_feature(msg, L1CTL_PHY_FEATURE_CODEC_FR);
+	osmo_nego_add_feature(msg, L1CTL_PHY_FEATURE_CODEC_EFR);
+
+	/* A5/X ciphering support */
+	osmo_nego_add_feature(msg, L1CTL_PHY_FEATURE_A5_1);
+	osmo_nego_add_feature(msg, L1CTL_PHY_FEATURE_A5_2);
+	osmo_nego_add_feature(msg, L1CTL_PHY_FEATURE_A5_3);
+
+	/* Other features */
+	osmo_nego_add_feature(msg, L1CTL_PHY_FEATURE_TX);
+	osmo_nego_add_feature(msg, L1CTL_PHY_FEATURE_PM);
+	osmo_nego_add_feature(msg, L1CTL_PHY_FEATURE_TRAFFIC);
+
+	/* Finally, compute the length fields */
+	features_tlv[0] = L1CTL_PHY_INFO_FEATURES;
+	features_tlv[1] = msg->tail - features_tlv - 2;
+	hdr->len = htons(msg->tail - hdr->data);
+
+	return 0;
+}