From fa105c4ba6dbb7acce585ab6e00f71f2aba9db8f Mon Sep 17 00:00:00 2001
From: Denis Kenzior <denkenz@gmail.com>
Date: Sun, 19 Jan 2014 21:39:26 -0600
Subject: [PATCH] hfp: Add initial SLC negotiation for HFP 1.7

---
 drivers/hfpmodem/slc.c | 95 +++++++++++++++++++++++++++++++++++++++++-
 1 file changed, 94 insertions(+), 1 deletion(-)

diff --git a/drivers/hfpmodem/slc.c b/drivers/hfpmodem/slc.c
index 34f2d5c0..5e1fa28b 100644
--- a/drivers/hfpmodem/slc.c
+++ b/drivers/hfpmodem/slc.c
@@ -41,10 +41,12 @@
 #include "hfp.h"
 #include "slc.h"
 
+static const char *none_prefix[] = { NULL };
 static const char *brsf_prefix[] = { "+BRSF:", NULL };
 static const char *cind_prefix[] = { "+CIND:", NULL };
 static const char *cmer_prefix[] = { "+CMER:", NULL };
 static const char *chld_prefix[] = { "+CHLD:", NULL };
+static const char *bind_prefix[] = { "+BIND:", NULL };
 
 struct slc_establish_data {
 	gint ref_count;
@@ -107,6 +109,90 @@ static void slc_established(struct slc_establish_data *sed)
 	sed->connect_cb(sed->userdata);
 }
 
+static void bind_query_cb(gboolean ok, GAtResult *result, gpointer user_data)
+{
+	struct slc_establish_data *sed = user_data;
+	GAtResultIter iter;
+	int hf_indicator;
+	int enabled;
+
+	if (!ok)
+		goto error;
+
+	g_at_result_iter_init(&iter, result);
+
+	while (g_at_result_iter_next(&iter, "+BIND:")) {
+		if (!g_at_result_iter_next_number(&iter, &hf_indicator))
+			goto error;
+
+		if (!g_at_result_iter_next_number(&iter, &enabled))
+			goto error;
+
+		ofono_info("AG wants indicator %d %s",
+				hf_indicator, enabled ? "enabled" : "disabled");
+	}
+
+	slc_established(sed);
+	return;
+
+error:
+	slc_failed(sed);
+}
+
+static void bind_support_cb(gboolean ok, GAtResult *result, gpointer user_data)
+{
+	struct slc_establish_data *sed = user_data;
+	struct hfp_slc_info *info = sed->info;
+	GAtResultIter iter;
+	int hf_indicator;
+
+	if (!ok)
+		goto error;
+
+	g_at_result_iter_init(&iter, result);
+
+	if (!g_at_result_iter_next(&iter, "+BIND:"))
+		goto error;
+
+	if (!g_at_result_iter_open_list(&iter))
+		goto error;
+
+	while (g_at_result_iter_next_number(&iter, &hf_indicator)) {
+		ofono_info("AG supports the following indicator: %d",
+				hf_indicator);
+
+		if (hf_indicator == HFP_HF_INDICATOR_ENHANCED_SAFETY)
+			ofono_info("Distracted Driving Reduction");
+	}
+
+	if (!g_at_result_iter_close_list(&iter))
+		goto error;
+
+	slc_establish_data_ref(sed);
+	g_at_chat_send(info->chat, "AT+BIND?", bind_prefix,
+				bind_query_cb, sed, slc_establish_data_unref);
+
+	return;
+
+error:
+	slc_failed(sed);
+}
+
+static void bind_set_cb(gboolean ok, GAtResult *result, gpointer user_data)
+{
+	struct slc_establish_data *sed = user_data;
+	struct hfp_slc_info *info = sed->info;
+
+	if (!ok) {
+		slc_failed(sed);
+		return;
+	}
+
+	slc_establish_data_ref(sed);
+	g_at_chat_send(info->chat, "AT+BIND=?", bind_prefix,
+				bind_support_cb, sed, slc_establish_data_unref);
+}
+
 static void chld_cb(gboolean ok, GAtResult *result, gpointer user_data)
 {
 	struct slc_establish_data *sed = user_data;
@@ -148,7 +234,14 @@ static void chld_cb(gboolean ok, GAtResult *result, gpointer user_data)
 
 	info->ag_mpty_features = ag_mpty_feature;
 
-	slc_established(sed);
+	if (info->ag_features & HFP_AG_FEATURE_HF_INDICATORS &&
+			info->hf_features & HFP_HF_FEATURE_HF_INDICATORS) {
+		slc_establish_data_ref(sed);
+		g_at_chat_send(info->chat, "AT+BIND=1", none_prefix,
+				bind_set_cb, sed, slc_establish_data_unref);
+	} else
+		slc_established(sed);
+
 	return;
 
 error: