further decouple lapdm code from osmocom_ms and l1ctl

we introduce a new primitive layer betwen PH and DL, enabling the
use of the LAPDm code in applications that are not based on L1CTL

1 files changed, 62 insertions, 0 deletions

diff --git a/src/host/layer23/src/common/l1ctl_lapdm_glue.c b/src/host/layer23/src/common/l1ctl_lapdm_glue.c
new file mode 100644
index 00000000..db071a35
--- /dev/null
+++ b/src/host/layer23/src/common/l1ctl_lapdm_glue.c
@@ -0,0 +1,62 @@
+/* Glue code between L1CTL and LAPDm */
+
+/* (C) 2011 by Harald Welte <laforge@gnumonks.org>
+ *
+ * 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 <stdint.h>
+
+#include <l1ctl_proto.h>
+
+#include <osmocom/gsm/prim.h>
+
+#include <osmocom/bb/common/l1ctl.h>
+#include <osmocom/bb/common/lapdm.h>
+
+/* LAPDm wants to send a PH-* primitive to the physical layer (L1) */
+int l1ctl_ph_prim_cb(struct osmo_prim_hdr *oph, void *ctx)
+{
+	struct osmocom_ms *ms = ctx;
+	struct osmo_phsap_prim *pp = (struct osmo_phsap_prim *) oph;
+	int rc = 0;
+
+	if (oph->sap != SAP_GSM_PH)
+		return -ENODEV;
+
+	if (oph->operation != PRIM_OP_REQUEST)
+		return -EINVAL;
+
+	switch (oph->primitive) {
+	case PRIM_PH_DATA:
+		rc = l1ctl_tx_data_req(ms, oph->msg, pp->u.data.chan_nr,
+					pp->u.data.link_id);
+		break;
+	case PRIM_PH_RACH:
+		l1ctl_tx_param_req(ms, pp->u.rach_req.ta,
+				   pp->u.rach_req.tx_power);
+		rc = l1ctl_tx_rach_req(ms, pp->u.rach_req.ra,
+				       pp->u.rach_req.offset,
+				       pp->u.rach_req.is_combined_ccch);
+		break;
+	default:
+		rc = -EINVAL;
+	}
+
+	return rc;
+}