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-rw-r--r--src/target/firmware/layer1/apc.c57
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diff --git a/src/target/firmware/layer1/apc.c b/src/target/firmware/layer1/apc.c
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+/* APC (Automatic Power Control) Implementation */
+
+/* (C) 2010 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 <errno.h>
+
+#include <osmocom/core/utils.h>
+#include <osmocom/gsm/gsm_utils.h>
+
+#include <layer1/apc.h>
+
+/* calibration table defined in board file */
+extern const int16_t dbm2apc_gsm900[];
+extern const int dbm2apc_gsm900_max;
+
+
+/* determine the AUXAPC value by the Tx Power Level */
+int16_t apc_tx_dbm2auxapc(enum gsm_band band, int8_t dbm)
+{
+ if (dbm < 0)
+ return -ERANGE;
+
+ /* FIXME: offsets for different bands! */
+ if (dbm > dbm2apc_gsm900_max)
+ dbm = dbm2apc_gsm900_max;
+
+ return dbm2apc_gsm900[dbm];
+}
+
+/* determine the AUXAPC value by the Tx Power Level */
+int16_t apc_tx_pwrlvl2auxapc(enum gsm_band band, uint8_t lvl)
+{
+ /* convert tx power level to dBm */
+ int dbm = ms_pwr_dbm(band, lvl);
+ if (dbm < 0)
+ return dbm;
+
+ return apc_tx_dbm2auxapc(band, dbm);
+}