Initial commit for OC-2G support.
From-Commit: b77fd00608dd
From-Remote: https://gitlab.com/nrw_noa/osmo-pcu
Change-Id: I7cd89a549c9463e81893ca7dd925299f728e4453
diff --git a/src/osmo-bts-oc2g/oc2g_l1_hw.c b/src/osmo-bts-oc2g/oc2g_l1_hw.c
new file mode 100644
index 0000000..aaa543f
--- /dev/null
+++ b/src/osmo-bts-oc2g/oc2g_l1_hw.c
@@ -0,0 +1,213 @@
+/* Interface handler for Nuran Wireless Litecell 1.5 L1 (real hardware) */
+
+/* Copyright (C) 2015 by Yves Godin <support@nuranwireless.com>
+ * based on:
+ * femto_l1_hw.c
+ * (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 Affero General Public License as published by
+ * the Free Software Foundation; either version 3 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 Affero General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#include <assert.h>
+#include <stdint.h>
+#include <unistd.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <string.h>
+#include <limits.h>
+
+#include <sys/types.h>
+#include <sys/stat.h>
+
+#include <osmocom/core/talloc.h>
+#include <osmocom/core/utils.h>
+#include <osmocom/core/select.h>
+#include <osmocom/core/write_queue.h>
+#include <osmocom/core/timer.h>
+#include <osmocom/gsm/gsm_utils.h>
+
+#include <nrw/oc2g/oc2g.h>
+#include <nrw/oc2g/gsml1prim.h>
+#include <nrw/oc2g/gsml1const.h>
+#include <nrw/oc2g/gsml1types.h>
+
+#include "gprs_debug.h"
+#include "oc2g_l1_if.h"
+#include "oc2gbts.h"
+
+#define DEV_SYS_DSP2ARM_NAME "/dev/msgq/oc2g_dsp2arm_trx"
+#define DEV_SYS_ARM2DSP_NAME "/dev/msgq/oc2g_arm2dsp_trx"
+#define DEV_L1_DSP2ARM_NAME "/dev/msgq/gsml1_sig_dsp2arm_trx"
+#define DEV_L1_ARM2DSP_NAME "/dev/msgq/gsml1_sig_arm2dsp_trx"
+
+#define DEV_TCH_DSP2ARM_NAME "/dev/msgq/gsml1_tch_dsp2arm_trx"
+#define DEV_TCH_ARM2DSP_NAME "/dev/msgq/gsml1_tch_arm2dsp_trx"
+#define DEV_PDTCH_DSP2ARM_NAME "/dev/msgq/gsml1_pdtch_dsp2arm_trx"
+#define DEV_PDTCH_ARM2DSP_NAME "/dev/msgq/gsml1_pdtch_arm2dsp_trx"
+
+static const char *rd_devnames[] = {
+ [MQ_SYS_READ] = DEV_SYS_DSP2ARM_NAME,
+ [MQ_L1_READ] = DEV_L1_DSP2ARM_NAME,
+ [MQ_TCH_READ] = DEV_TCH_DSP2ARM_NAME,
+ [MQ_PDTCH_READ] = DEV_PDTCH_DSP2ARM_NAME,
+};
+
+static const char *wr_devnames[] = {
+ [MQ_SYS_WRITE] = DEV_SYS_ARM2DSP_NAME,
+ [MQ_L1_WRITE] = DEV_L1_ARM2DSP_NAME,
+ [MQ_TCH_WRITE] = DEV_TCH_ARM2DSP_NAME,
+ [MQ_PDTCH_WRITE]= DEV_PDTCH_ARM2DSP_NAME,
+};
+
+/* callback when there's something to read from the l1 msg_queue */
+static int l1if_fd_cb(struct osmo_fd *ofd, unsigned int what)
+{
+ //struct msgb *msg = l1p_msgb_alloc();
+ struct msgb *msg = msgb_alloc_headroom(sizeof(Oc2g_Prim_t) + 128,
+ 128, "1l_fd");
+ struct oc2gl1_hdl *fl1h = ofd->data;
+ int rc;
+
+ msg->l1h = msg->data;
+ rc = read(ofd->fd, msg->l1h, msgb_tailroom(msg));
+ if (rc < 0) {
+ if (rc != -1)
+ LOGP(DL1IF, LOGL_ERROR, "error reading from L1 msg_queue: %s\n",
+ strerror(errno));
+ msgb_free(msg);
+ return rc;
+ }
+ msgb_put(msg, rc);
+
+ switch (ofd->priv_nr) {
+ case MQ_SYS_WRITE:
+ if (rc != sizeof(Oc2g_Prim_t))
+ LOGP(DL1IF, LOGL_NOTICE, "%u != "
+ "sizeof(Litecell15_Prim_t)\n", rc);
+ return l1if_handle_sysprim(fl1h, msg);
+ case MQ_L1_WRITE:
+ case MQ_TCH_WRITE:
+ case MQ_PDTCH_WRITE:
+ if (rc != sizeof(GsmL1_Prim_t))
+ LOGP(DL1IF, LOGL_NOTICE, "%u != "
+ "sizeof(GsmL1_Prim_t)\n", rc);
+ return l1if_handle_l1prim(ofd->priv_nr, fl1h, msg);
+ default:
+ /* The compiler can't know that priv_nr is an enum. Assist. */
+ LOGP(DL1IF, LOGL_FATAL, "writing on a wrong queue: %d\n",
+ ofd->priv_nr);
+ exit(0);
+ break;
+ }
+};
+
+/* callback when we can write to one of the l1 msg_queue devices */
+static int l1fd_write_cb(struct osmo_fd *ofd, struct msgb *msg)
+{
+ int rc;
+
+ rc = write(ofd->fd, msg->l1h, msgb_l1len(msg));
+ if (rc < 0) {
+ LOGP(DL1IF, LOGL_ERROR, "error writing to L1 msg_queue: %s\n",
+ strerror(errno));
+ return rc;
+ } else if (rc < msg->len) {
+ LOGP(DL1IF, LOGL_ERROR, "short write to L1 msg_queue: "
+ "%u < %u\n", rc, msg->len);
+ return -EIO;
+ }
+
+ return 0;
+}
+
+int l1if_transport_open(int q, struct oc2gl1_hdl *hdl)
+{
+ int rc;
+ char buf[PATH_MAX];
+
+ /* Step 1: Open all msg_queue file descriptors */
+ struct osmo_fd *read_ofd = &hdl->read_ofd[q];
+ struct osmo_wqueue *wq = &hdl->write_q[q];
+ struct osmo_fd *write_ofd = &hdl->write_q[q].bfd;
+
+ snprintf(buf, sizeof(buf)-1, "%s%d", rd_devnames[q], hdl->hw_info.trx_nr);
+ buf[sizeof(buf)-1] = '\0';
+
+ rc = open(buf, O_RDONLY);
+ if (rc < 0) {
+ LOGP(DL1IF, LOGL_FATAL, "unable to open msg_queue %s: %s\n",
+ buf, strerror(errno));
+ return rc;
+ }
+ read_ofd->fd = rc;
+ read_ofd->priv_nr = q;
+ read_ofd->data = hdl;
+ read_ofd->cb = l1if_fd_cb;
+ read_ofd->when = BSC_FD_READ;
+ rc = osmo_fd_register(read_ofd);
+ if (rc < 0) {
+ close(read_ofd->fd);
+ read_ofd->fd = -1;
+ return rc;
+ }
+
+ snprintf(buf, sizeof(buf)-1, "%s%d", wr_devnames[q], hdl->hw_info.trx_nr);
+ buf[sizeof(buf)-1] = '\0';
+
+ rc = open(buf, O_WRONLY);
+ if (rc < 0) {
+ LOGP(DL1IF, LOGL_FATAL, "unable to open msg_queue %s: %s\n",
+ buf, strerror(errno));
+ goto out_read;
+ }
+ osmo_wqueue_init(wq, 10);
+ wq->write_cb = l1fd_write_cb;
+ write_ofd->fd = rc;
+ write_ofd->priv_nr = q;
+ write_ofd->data = hdl;
+ write_ofd->when = BSC_FD_WRITE;
+ rc = osmo_fd_register(write_ofd);
+ if (rc < 0) {
+ close(write_ofd->fd);
+ write_ofd->fd = -1;
+ goto out_read;
+ }
+
+ return 0;
+
+out_read:
+ close(hdl->read_ofd[q].fd);
+ osmo_fd_unregister(&hdl->read_ofd[q]);
+
+ return rc;
+}
+
+int l1if_transport_close(int q, struct oc2gl1_hdl *hdl)
+{
+ struct osmo_fd *read_ofd = &hdl->read_ofd[q];
+ struct osmo_fd *write_ofd = &hdl->write_q[q].bfd;
+
+ osmo_fd_unregister(read_ofd);
+ close(read_ofd->fd);
+ read_ofd->fd = -1;
+
+ osmo_fd_unregister(write_ofd);
+ close(write_ofd->fd);
+ write_ofd->fd = -1;
+
+ return 0;
+}