From 0cfefa0e120c51fb745b66b7a6915b140635f9b5 Mon Sep 17 00:00:00 2001
From: Holger Hans Peter Freyther <zecke@selfish.org>
Date: Wed, 11 Jul 2012 23:14:10 +0200
Subject: calib: Add code to change the BSIC/TSC before following the BCCH.

---
 contrib/sysmobts-calib/sysmobts-calib.c  | 14 +++++++++
 contrib/sysmobts-calib/sysmobts-layer1.c | 51 +++++++++++++++++++++++++++++++-
 2 files changed, 64 insertions(+), 1 deletion(-)

(limited to 'contrib')

diff --git a/contrib/sysmobts-calib/sysmobts-calib.c b/contrib/sysmobts-calib/sysmobts-calib.c
index e246a327..6e7cac34 100644
--- a/contrib/sysmobts-calib/sysmobts-calib.c
+++ b/contrib/sysmobts-calib/sysmobts-calib.c
@@ -211,6 +211,8 @@ extern int activate_rf_frontend(int clock_source, int clock_cor);
 extern int power_scan(int band, int arfcn, int duration, float *mean_rssi);
 extern int follow_sch(int band, int arfcn, int calib, int reference, HANDLE *layer1);
 extern int follow_bch(HANDLE layer1);
+extern int find_bsic(void);
+extern int set_tsc_from_bsic(HANDLE layer1, int bsic);
 extern int set_clock_cor(int clock_corr, int calib, int source);
 extern int rf_clock_info(HANDLE *layer1, int *clkErr, int *clkErrRes);
 extern int mph_close(HANDLE layer1);
@@ -227,6 +229,11 @@ extern int wait_for_data(uint8_t *data, size_t *size);
 		printf("%s: %d\n", msg, rc);	\
 		return EXIT_FAILURE; 		\
 	}
+#define CHECK_COND_MSG(cond, rc, msg) \
+	if (cond) { \
+		printf("%s: %d\n", msg, rc);	\
+		return EXIT_FAILURE; 		\
+	}
 
 struct scan_result 
 {
@@ -395,6 +402,13 @@ static int bcch_follow(void)
 		rc = find_initial_clock(layer1, &cor);
 	CHECK_RC_MSG(rc, "Following SCH failed");
 
+	/* identify the BSIC and set it as TSC */
+	rc = find_bsic();
+	CHECK_COND_MSG(rc < 0, rc, "Identifying the BSIC failed");
+	rc = set_tsc_from_bsic(layer1, rc);
+	CHECK_RC_MSG(rc, "Setting the TSC failed");
+
+
 	/* follow the bcch */
 	rc = follow_bcch(layer1);
 	CHECK_RC_MSG(rc, "Follow BCCH");
diff --git a/contrib/sysmobts-calib/sysmobts-layer1.c b/contrib/sysmobts-calib/sysmobts-layer1.c
index 239318b4..c53a21c2 100644
--- a/contrib/sysmobts-calib/sysmobts-layer1.c
+++ b/contrib/sysmobts-calib/sysmobts-layer1.c
@@ -407,7 +407,8 @@ int follow_sch(int band, int arfcn, int clock, int ref, HANDLE *layer1)
 	memset(&prim, 0, sizeof(prim));
 	prim.u.mphConnectReq.hLayer1 = *layer1;
 	prim.u.mphConnectReq.u8Tn = 0;
-	prim.u.mphConnectReq.logChComb = GsmL1_LogChComb_V;
+	prim.u.mphConnectReq.logChComb = GsmL1_LogChComb_IV;
+	printf("FIVE\n");
 	rc = send_recv_sig_prim(GsmL1_PrimId_MphConnectReq, &prim);
 	if (rc != 0) {
 		printf("Failed to connect.\n");
@@ -515,6 +516,54 @@ int follow_bcch(HANDLE layer1)
 	return 0;
 }
 
+int find_bsic(void)
+{
+	int rc, i;
+	GsmL1_Prim_t prim;
+
+	printf("Waiting for SCH data.\n");
+	for (i = 0; i < 10; ++i) {
+		uint8_t bsic;
+		rc = wait_for_indication(GsmL1_PrimId_PhDataInd, &prim);
+		if (rc < 0) {
+			printf("Didn't get SCH data.\n");
+			return rc;
+		}
+		if (prim.u.phDataInd.sapi != GsmL1_Sapi_Sch)
+			continue;
+
+		bsic = (prim.u.phDataInd.msgUnitParam.u8Buffer[0] >> 2) & 0xFF;
+		return bsic;
+	}
+
+	printf("Giving up finding the SCH\n");
+	return -1;
+}
+
+int set_tsc_from_bsic(HANDLE layer1, int bsic)
+{
+	int rc;
+	int tsc = bsic & 0x7;
+	GsmL1_Prim_t prim;
+
+	memset(&prim, 0, sizeof(prim));
+	prim.u.mphConfigReq.hLayer3 = 0x23;
+	prim.u.mphConfigReq.hLayer1 = layer1;
+	prim.u.mphConfigReq.cfgParamId = GsmL1_ConfigParamId_SetNbTsc;
+	prim.u.mphConfigReq.cfgParams.setNbTsc.u8NbTsc = tsc;
+	rc = send_recv_sig_prim(GsmL1_PrimId_MphConfigReq, &prim);
+	if (rc != 0) {
+		printf("Failed to send configure.\n");
+	}
+
+	if (prim.u.mphConfigCnf.status != GsmL1_Status_Success) {
+		printf("Failed to set the config cnf.\n");
+		return -1;
+	}
+
+	return 0;
+}
+
 int set_clock_cor(int clock_cor, int calib, int source)
 {
 	int rc;
-- 
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