From 270cf418fc64ad77b179f75394c5dc34c95f4388 Mon Sep 17 00:00:00 2001
From: Holger Hans Peter Freyther <holger@moiji-mobile.com>
Date: Mon, 1 Jul 2013 10:26:05 +0200
Subject: [PATCH] sysmobts: Read the mac and determine fixup only once during
 start

---
 src/osmo-bts-sysmo/calib_file.c | 32 ++++++++++++++++++++++++--------
 src/osmo-bts-sysmo/l1_if.h      |  8 ++++++++
 2 files changed, 32 insertions(+), 8 deletions(-)

diff --git a/src/osmo-bts-sysmo/calib_file.c b/src/osmo-bts-sysmo/calib_file.c
index 2cb497da9..a81deae0f 100644
--- a/src/osmo-bts-sysmo/calib_file.c
+++ b/src/osmo-bts-sysmo/calib_file.c
@@ -143,21 +143,22 @@ static const float delta_by_band[Num_GsmL1_FreqBand] = {
 
 extern const uint8_t fixup_macs[95][6];
 
-static void calib_fixup_rx(struct femtol1_hdl *fl1h, SuperFemto_Prim_t *prim)
+
+static void determine_fixup(struct femtol1_hdl *fl1h)
 {
-#if SUPERFEMTO_API_VERSION >= SUPERFEMTO_API(2,4,0)
-	SuperFemto_SetRxCalibTblReq_t *rx = &prim->u.setRxCalibTblReq;
 	uint8_t macaddr[6];
 	int rc, i;
-	int fixup_needed = 0;
 
 	rc = eeprom_ReadEthAddr(macaddr);
 	if (rc != EEPROM_SUCCESS) {
 		LOGP(DL1C, LOGL_ERROR,
-			"Unable to read Ethenet MAC from EEPROM\n");
+		"Unable to read Ethenet MAC from EEPROM\n");
 		return;
 	}
 
+	/* assume no fixup is needed */
+	fl1h->fixup_needed = FIXUP_NOT_NEEDED;
+
 	if (fl1h->hw_info.dsp_version[0] < 3 ||
 	    (fl1h->hw_info.dsp_version[0] == 3 &&
 	     fl1h->hw_info.dsp_version[1] < 3)) {
@@ -168,16 +169,31 @@ static void calib_fixup_rx(struct femtol1_hdl *fl1h, SuperFemto_Prim_t *prim)
 
 	for (i = 0; i < sizeof(fixup_macs)/6; i++) {
 		if (!memcmp(fixup_macs[i], macaddr, 6)) {
-			fixup_needed = 1;
+			fl1h->fixup_needed = FIXUP_NEEDED;
 			break;
 		}
 	}
 
 	LOGP(DL1C, LOGL_NOTICE, "MAC Address is %02x:%02x:%02x:%02x:%02x:%02x -> %s\n",
 		macaddr[0], macaddr[1], macaddr[2], macaddr[3],
-		macaddr[4], macaddr[5], fixup_needed ? "FIXUP" : "NO FIXUP");
+		macaddr[4], macaddr[5],
+		fl1h->fixup_needed == FIXUP_NEEDED ? "FIXUP" : "NO FIXUP");
+}
 
-	if (fixup_needed)
+static int fixup_needed(struct femtol1_hdl *fl1h)
+{
+	if (fl1h->fixup_needed == FIXUP_UNITILIAZED)
+		determine_fixup(fl1h);
+
+	return fl1h->fixup_needed == FIXUP_NEEDED;
+}
+
+static void calib_fixup_rx(struct femtol1_hdl *fl1h, SuperFemto_Prim_t *prim)
+{
+#if SUPERFEMTO_API_VERSION >= SUPERFEMTO_API(2,4,0)
+	SuperFemto_SetRxCalibTblReq_t *rx = &prim->u.setRxCalibTblReq;
+
+	if (fixup_needed(fl1h))
 		rx->fExtRxGain += delta_by_band[rx->freqBand];
 #endif
 }
diff --git a/src/osmo-bts-sysmo/l1_if.h b/src/osmo-bts-sysmo/l1_if.h
index cf4f4835c..7947ea2c6 100644
--- a/src/osmo-bts-sysmo/l1_if.h
+++ b/src/osmo-bts-sysmo/l1_if.h
@@ -32,6 +32,12 @@ struct calib_send_state {
 	int last_file_idx;
 };
 
+enum {
+	FIXUP_UNITILIAZED,
+	FIXUP_NEEDED,
+	FIXUP_NOT_NEEDED,
+};
+
 struct femtol1_hdl {
 	struct gsm_time gsm_time;
 	uint32_t hLayer1;			/* handle to the L1 instance in the DSP */
@@ -61,6 +67,8 @@ struct femtol1_hdl {
 		uint32_t band_support;	/* bitmask of GSM_BAND_* */
 	} hw_info;
 
+	int fixup_needed;
+
 	struct calib_send_state st;
 };