From 11c7193ad8ceb4f3898799dc44b700b8b93a59b8 Mon Sep 17 00:00:00 2001
From: Harald Welte <laforge@gnumonks.org>
Date: Tue, 24 May 2011 17:15:12 +0200
Subject: Import abis_nm_{chcomb4pchan,pchan4chcomb}() from openbsc

---
 include/osmocom/gsm/abis_nm.h   |  2 ++
 include/osmocom/gsm/gsm_utils.h | 26 ++++++++++++++++++++++++++
 src/gsm/abis_nm.c               | 32 ++++++++++++++++++++++++++++++++
 3 files changed, 60 insertions(+)

diff --git a/include/osmocom/gsm/abis_nm.h b/include/osmocom/gsm/abis_nm.h
index 720b603d..dcc8d4bb 100644
--- a/include/osmocom/gsm/abis_nm.h
+++ b/include/osmocom/gsm/abis_nm.h
@@ -22,4 +22,6 @@ const char *abis_nm_avail_name(uint8_t avail);
 const char *abis_nm_test_name(uint8_t test);
 void abis_nm_debugp_foh(int ss, struct abis_om_fom_hdr *foh);
 
+int abis_nm_chcomb4pchan(enum gsm_phys_chan_config pchan);
+enum abis_nm_chan_comb abis_nm_pchan4chcomb(uint8_t chcomb);
 #endif /* _OSMO_GSM_ABIS_NM_H */
diff --git a/include/osmocom/gsm/gsm_utils.h b/include/osmocom/gsm/gsm_utils.h
index 19adb70a..a0ef3c4f 100644
--- a/include/osmocom/gsm/gsm_utils.h
+++ b/include/osmocom/gsm/gsm_utils.h
@@ -114,4 +114,30 @@ int gprs_tlli_type(uint32_t tlli);
 
 uint32_t gprs_tmsi2tlli(uint32_t p_tmsi, enum gprs_tlli_type type);
 
+/* Osmocom internal, not part of any gsm spec */
+enum gsm_phys_chan_config {
+	GSM_PCHAN_NONE,
+	GSM_PCHAN_CCCH,
+	GSM_PCHAN_CCCH_SDCCH4,
+	GSM_PCHAN_TCH_F,
+	GSM_PCHAN_TCH_H,
+	GSM_PCHAN_SDCCH8_SACCH8C,
+	GSM_PCHAN_PDCH,		/* GPRS PDCH */
+	GSM_PCHAN_TCH_F_PDCH,	/* TCH/F if used, PDCH otherwise */
+	GSM_PCHAN_UNKNOWN,
+	_GSM_PCHAN_MAX
+};
+
+/* Osmocom internal, not part of any gsm spec */
+enum gsm_chan_t {
+	GSM_LCHAN_NONE,
+	GSM_LCHAN_SDCCH,
+	GSM_LCHAN_TCH_F,
+	GSM_LCHAN_TCH_H,
+	GSM_LCHAN_UNKNOWN,
+	GSM_LCHAN_CCCH,
+	_GSM_LCHAN_MAX
+};
+
+
 #endif
diff --git a/src/gsm/abis_nm.c b/src/gsm/abis_nm.c
index 109c3bba..a82194fd 100644
--- a/src/gsm/abis_nm.c
+++ b/src/gsm/abis_nm.c
@@ -21,9 +21,12 @@
  */
 
 #include <stdint.h>
+#include <errno.h>
+
 #include <osmocom/core/utils.h>
 #include <osmocom/core/logging.h>
 #include <osmocom/gsm/tlv.h>
+#include <osmocom/gsm/gsm_utils.h>
 #include <osmocom/gsm/protocol/gsm_12_21.h>
 #include <osmocom/gsm/abis_nm.h>
 
@@ -394,3 +397,32 @@ void abis_nm_debugp_foh(int ss, struct abis_om_fom_hdr *foh)
 		foh->obj_class, foh->obj_inst.bts_nr, foh->obj_inst.trx_nr,
 		foh->obj_inst.ts_nr);
 }
+
+static const enum abis_nm_chan_comb chcomb4pchan[] = {
+	[GSM_PCHAN_CCCH]	= NM_CHANC_mainBCCH,
+	[GSM_PCHAN_CCCH_SDCCH4]	= NM_CHANC_BCCHComb,
+	[GSM_PCHAN_TCH_F]	= NM_CHANC_TCHFull,
+	[GSM_PCHAN_TCH_H]	= NM_CHANC_TCHHalf,
+	[GSM_PCHAN_SDCCH8_SACCH8C] = NM_CHANC_SDCCH,
+	[GSM_PCHAN_PDCH]	= NM_CHANC_IPAC_PDCH,
+	[GSM_PCHAN_TCH_F_PDCH]	= NM_CHANC_IPAC_TCHFull_PDCH,
+	/* FIXME: bounds check */
+};
+
+int abis_nm_chcomb4pchan(enum gsm_phys_chan_config pchan)
+{
+	if (pchan < ARRAY_SIZE(chcomb4pchan))
+		return chcomb4pchan[pchan];
+
+	return -EINVAL;
+}
+
+enum abis_nm_chan_comb abis_nm_pchan4chcomb(uint8_t chcomb)
+{
+	int i;
+	for (i = 0; i < ARRAY_SIZE(chcomb4pchan); i++) {
+		if (chcomb4pchan[i] == chcomb)
+			return i;
+	}
+	return GSM_PCHAN_NONE;
+}
-- 
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