Allow setting of seperate coding schemes for uplink and downlink

src/gprs_rlcmac.cpp

@@ -1275,7 +1275,7 @@ int write_immediate_assignment(bitvec * dest, uint8_t downlink, uint8_t ra,
 			bitvec_write_field(dest, wp, usf, 3);    // USF
 			bitvec_write_field(dest, wp, 0, 1);    // USF_GRANULARITY
 			bitvec_write_field(dest, wp, 0, 1);   // "0" power control: Not Present
-			bitvec_write_field(dest, wp, bts->initial_cs-1, 2);    // CHANNEL_CODING_COMMAND 
+			bitvec_write_field(dest, wp, bts->initial_cs_ul-1, 2);    // CHANNEL_CODING_COMMAND 
 			bitvec_write_field(dest, wp, 1, 1);    // TLLI_BLOCK_CHANNEL_CODING
 			if (alpha) {
 				bitvec_write_field(dest, wp,0x1,1);   // ALPHA = present
@@ -1321,7 +1321,7 @@ void write_packet_uplink_assignment(bitvec * dest, uint8_t old_tfi,
 	}
 
 	bitvec_write_field(dest, wp,0x0,1); // Message escape
-	bitvec_write_field(dest, wp,bts->initial_cs-1, 2); // CHANNEL_CODING_COMMAND 
+	bitvec_write_field(dest, wp,bts->initial_cs_ul-1, 2); // CHANNEL_CODING_COMMAND 
 	bitvec_write_field(dest, wp,0x1,1); // TLLI_BLOCK_CHANNEL_CODING 
 
 	bitvec_write_field(dest, wp,0x1,1); // switch TIMING_ADVANCE_VALUE = on
@@ -1461,7 +1461,7 @@ void write_packet_uplink_ack(RlcMacDownlink_t * block, struct gprs_rlcmac_tbf *t
 	block->u.Packet_Uplink_Ack_Nack.UPLINK_TFI   = tbf->tfi; // Uplink TFI
 
 	block->u.Packet_Uplink_Ack_Nack.UnionType    = 0x0;      // PU_AckNack_GPRS = on
-	block->u.Packet_Uplink_Ack_Nack.u.PU_AckNack_GPRS_Struct.CHANNEL_CODING_COMMAND                        = bts->initial_cs - 1;             // CS1
+	block->u.Packet_Uplink_Ack_Nack.u.PU_AckNack_GPRS_Struct.CHANNEL_CODING_COMMAND                        = bts->initial_cs_ul - 1;             // CS1
 	block->u.Packet_Uplink_Ack_Nack.u.PU_AckNack_GPRS_Struct.Ack_Nack_Description.FINAL_ACK_INDICATION     = final;           // FINAL ACK INDICATION
 	block->u.Packet_Uplink_Ack_Nack.u.PU_AckNack_GPRS_Struct.Ack_Nack_Description.STARTING_SEQUENCE_NUMBER = tbf->dir.ul.v_r; // STARTING_SEQUENCE_NUMBER
 	// RECEIVE_BLOCK_BITMAP

src/gprs_rlcmac.h

@@ -67,7 +67,7 @@ struct gprs_rlcmac_bts {
 	uint8_t cs2;
 	uint8_t cs3;
 	uint8_t cs4;
-	uint8_t initial_cs;
+	uint8_t initial_cs_dl, initial_cs_ul;
 	uint8_t force_cs;	/* 0=use from BTS 1=use from VTY */
 	uint16_t force_llc_lifetime; /* overrides lifetime from SGSN */
 	uint8_t t3142;

src/gprs_rlcmac_data.cpp

@@ -1290,7 +1290,7 @@ do_resend:
 	index = tbf->dir.dl.v_s & mod_sns_half;
 	data = tbf->rlc_block[index];
 	if (tbf->cs == 0) {
-		tbf->cs = bts->initial_cs;
+		tbf->cs = bts->initial_cs_dl;
 		if (tbf->cs < 1 || tbf->cs > 4)
 			tbf->cs = 1;
 	}

src/pcu_l1_if.cpp

@@ -405,9 +405,10 @@ bssgp_failed:
 	}
 	if (!bts->force_cs) {
 		if (info_ind->initial_cs < 1 || info_ind->initial_cs > 4)
-			bts->initial_cs = 1;
+			bts->initial_cs_dl = 1;
 		else
-			bts->initial_cs = info_ind->initial_cs;
+			bts->initial_cs_dl = info_ind->initial_cs;
+		bts->initial_cs_ul = bts->initial_cs_dl;
 	}
 
 	for (trx = 0; trx < 8; trx++) {

src/pcu_main.cpp

@@ -141,9 +141,8 @@ int main(int argc, char *argv[])
 						struct gprs_rlcmac_bts);
 	if (!gprs_rlcmac_bts)
 		return -ENOMEM;
-	gprs_rlcmac_bts->initial_cs = 1;
 	bts->fc_interval = 1;
-	bts->initial_cs = 1;
+	bts->initial_cs_dl = bts->initial_cs_ul = 1;
 	bts->cs1 = 1;
 	bts->t3142 = 20;
 	bts->t3169 = 5;

src/pcu_vty.c

@@ -82,7 +82,12 @@ static int config_write_pcu(struct vty *vty)
 	vty_out(vty, " flow-control-interval %d%s", bts->fc_interval,
 		VTY_NEWLINE);
 	if (bts->force_cs)
-		vty_out(vty, " cs %d%s", bts->initial_cs, VTY_NEWLINE);
+		if (bts->initial_cs_ul == bts->initial_cs_dl)
+			vty_out(vty, " cs %d%s", bts->initial_cs_dl,
+				VTY_NEWLINE);
+		else
+			vty_out(vty, " cs %d %d%s", bts->initial_cs_dl,
+				bts->initial_cs_ul, VTY_NEWLINE);
 	if (bts->force_llc_lifetime == 0xffff)
 		vty_out(vty, " queue lifetime infinite%s", VTY_NEWLINE);
 	else if (bts->force_llc_lifetime)
@@ -125,14 +130,19 @@ DEFUN(cfg_pcu_fc_interval,
 
 DEFUN(cfg_pcu_cs,
       cfg_pcu_cs_cmd,
-      "cs <1-4>",
+      "cs <1-4> [<1-4>]",
-      "Set the Coding Scheme to be used, (overrides BTS config)\n")
+      "Set the Coding Scheme to be used, (overrides BTS config)\n"
+      "Initial CS used\nAlternative uplink CS")
 {
 	struct gprs_rlcmac_bts *bts = gprs_rlcmac_bts;
 	uint8_t cs = atoi(argv[0]);
 
 	bts->force_cs = 1;
-	bts->initial_cs = cs;
+	bts->initial_cs_dl = cs;
+	if (argc > 1)
+		bts->initial_cs_ul = atoi(argv[1]);
+	else
+		bts->initial_cs_ul = cs;
 
 	return CMD_SUCCESS;
 }