droid 4: special handling for SMSes

Droid 4	 modem is "special" (aka broken) so and getting incoming SMSes
to work is quite tricky. This should get it right.

drivers/atmodem/sms.c

@@ -464,7 +464,8 @@ static void at_cmt_notify(GAtResult *result, gpointer user_data)
 	decode_hex_own_buf(hexpdu, -1, &pdu_len, 0, pdu);
 	ofono_sms_deliver_notify(sms, pdu, pdu_len, tpdu_len);
 
-	if (data->vendor != OFONO_VENDOR_SIMCOM)
+	if (data->vendor != OFONO_VENDOR_SIMCOM &&
+			data->vendor != OFONO_VENDOR_DROID)
 		at_ack_delivery(sms);
 	return;
 
@@ -847,6 +848,7 @@ static gboolean build_cnmi_string(char *buf, int *cnmi_opts,
 	case OFONO_VENDOR_SIMCOM:
 	case OFONO_VENDOR_QUECTEL:
 	case OFONO_VENDOR_QUECTEL_EC2X:
+	case OFONO_VENDOR_DROID:
 		/* MSM devices advertise support for mode 2, but return an
 		 * error if we attempt to actually use it. */
 		mode = "1";
@@ -860,9 +862,15 @@ static gboolean build_cnmi_string(char *buf, int *cnmi_opts,
 	if (!append_cnmi_element(buf, &len, cnmi_opts[0], mode, FALSE))
 		return FALSE;
 
+	mode = "21";
+	if (!data->cnma_enabled)
+		mode = "1";
+
+	if (data->vendor == OFONO_VENDOR_DROID)
+		mode = "2";
+
 	/* Prefer to deliver SMS via +CMT if CNMA is supported */
-	if (!append_cnmi_element(buf, &len, cnmi_opts[1],
-					data->cnma_enabled ? "21" : "1", FALSE))
+	if (!append_cnmi_element(buf, &len, cnmi_opts[1], mode, FALSE))
 		return FALSE;
 
 	switch (data->vendor) {
@@ -1292,6 +1300,8 @@ static void at_csms_query_cb(gboolean ok, GAtResult *result,
 		goto out;
 
 	switch (data->vendor) {
+	case OFONO_VENDOR_DROID:
+		break;
 	case OFONO_VENDOR_QUECTEL_SERIAL:
 		g_at_result_iter_next_number(&iter, &status_min);
 		g_at_result_iter_next_number(&iter, &status_max);