[PATCH v5 1/3] huawei: detect possible secondary device

[Kalle Valo <kalle.valo@canonical.com>]

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---

 plugins/huawei.c |   67 +++++++++++++++++++++++++++++++++++++++++++-----------
 plugins/udev.c   |   61 +++++++++++++++++++++++++++++++++++++++++++------
 2 files changed, 106 insertions(+), 22 deletions(-)

diff --git a/plugins/huawei.c b/plugins/huawei.c
index df4d177..489f3e2 100644
--- a/plugins/huawei.c
+++ b/plugins/huawei.c
@@ -46,6 +46,7 @@
 
 struct huawei_data {
 	GAtChat *chat;
+	GAtChat *event;
 };
 
 static int huawei_probe(struct ofono_modem *modem)
@@ -72,12 +73,14 @@ static void huawei_remove(struct ofono_modem *modem)
 	ofono_modem_set_data(modem, NULL);
 
 	g_at_chat_unref(data->chat);
+	g_at_chat_unref(data->event);
 	g_free(data);
 }
 
 static void huawei_debug(const char *str, void *user_data)
 {
-	ofono_info("%s", str);
+	const char *prefix = user_data;
+	ofono_info("%s%s", prefix, str);
 }
 
 static void cfun_enable(gboolean ok, GAtResult *result, gpointer user_data)
@@ -90,35 +93,64 @@ static void cfun_enable(gboolean ok, GAtResult *result, gpointer user_data)
 		ofono_modem_set_powered(modem, TRUE);
 }
 
-static int huawei_enable(struct ofono_modem *modem)
+static GAtChat *create_port(const char *device)
 {
-	struct huawei_data *data = ofono_modem_get_data(modem);
 	GAtSyntax *syntax;
 	GIOChannel *channel;
-	const char *device;
-
-	DBG("%p", modem);
-
-	device = ofono_modem_get_string(modem, "Device");
-	if (!device)
-			return -EINVAL;
+	GAtChat *chat;
 
 	channel = g_at_tty_open(device, NULL);
 	if (!channel)
-		return -EIO;
+		return NULL;
 
 	syntax = g_at_syntax_new_gsm_permissive();
-	data->chat = g_at_chat_new(channel, syntax);
+	chat = g_at_chat_new(channel, syntax);
 	g_at_syntax_unref(syntax);
 	g_io_channel_unref(channel);
 
-	if (!data->chat)
+	if (!chat)
+		return NULL;
+
+	return chat;
+}
+
+static int huawei_enable(struct ofono_modem *modem)
+{
+	struct huawei_data *data = ofono_modem_get_data(modem);
+	const char *modem_device, *event_device;
+
+	DBG("%p", modem);
+
+	modem_device = ofono_modem_get_string(modem, "Device");
+	event_device = ofono_modem_get_string(modem, "SecondaryDevice");
+
+	if (modem_device == NULL || event_device == NULL)
+		return -EINVAL;
+
+	data->chat = create_port(modem_device);
+
+	if (data->chat == NULL)
 		return -EIO;
 
 	g_at_chat_add_terminator(data->chat, "COMMAND NOT SUPPORT", -1, FALSE);
 
 	if (getenv("OFONO_AT_DEBUG"))
-		g_at_chat_set_debug(data->chat, huawei_debug, NULL);
+		g_at_chat_set_debug(data->chat, huawei_debug, "");
+
+	data->event = create_port(event_device);
+
+	if (data->event == NULL) {
+		g_at_chat_unref(data->chat);
+		data->chat = NULL;
+		return -EIO;
+	}
+
+	g_at_chat_add_terminator(data->event, "COMMAND NOT SUPPORT", -1,
+					FALSE);
+
+	if (getenv("OFONO_AT_DEBUG"))
+		g_at_chat_set_debug(data->event, huawei_debug,
+					"EventChannel: ");
 
 	g_at_chat_send(data->chat, "ATE0", NULL, NULL, NULL, NULL);
 
@@ -148,6 +180,13 @@ static int huawei_disable(struct ofono_modem *modem)
 
 	DBG("%p", modem);
 
+	if (data->event) {
+		g_at_chat_cancel_all(data->event);
+		g_at_chat_unregister_all(data->event);
+		g_at_chat_unref(data->event);
+		data->event = NULL;
+	}
+
 	if (!data->chat)
 		return 0;
 
diff --git a/plugins/udev.c b/plugins/udev.c
index 3a6ea28..bdac4fd 100644
--- a/plugins/udev.c
+++ b/plugins/udev.c
@@ -89,6 +89,24 @@ static const char *get_serial(struct udev_device *udev_device)
 	return serial;
 }
 
+static const char *get_usb_num(struct udev_device *udev_device)
+{
+	struct udev_list_entry *entry;
+	const char *num = NULL;
+
+	entry = udev_device_get_properties_list_entry(udev_device);
+	while (entry) {
+		const char *name = udev_list_entry_get_name(entry);
+
+		if (g_strcmp0(name, "ID_USB_INTERFACE_NUM") == 0)
+			num = udev_list_entry_get_value(entry);
+
+		entry = udev_list_entry_get_next(entry);
+	}
+
+	return num;
+}
+
 #define MODEM_DEVICE		"ModemDevice"
 #define DATA_DEVICE		"DataDevice"
 #define GPS_DEVICE		"GPSDevice"
@@ -201,18 +219,45 @@ static void add_hso(struct ofono_modem *modem,
 static void add_huawei(struct ofono_modem *modem,
 					struct udev_device *udev_device)
 {
-	const char *devnode;
-	int registered;
+	const char *devnode, *num;
+	int primary, secondary;
 
-	registered = ofono_modem_get_integer(modem, "Registered");
-	if (registered != 0)
+	primary = ofono_modem_get_integer(modem, "PrimaryRegistered");
+	secondary = ofono_modem_get_integer(modem, "SecondaryRegistered");
+
+	if (primary && secondary)
 		return;
 
-	devnode = udev_device_get_devnode(udev_device);
-	ofono_modem_set_string(modem, "Device", devnode);
+	num = get_usb_num(udev_device);
 
-	ofono_modem_set_integer(modem, "Registered", 1);
-	ofono_modem_register(modem);
+	/*
+	 * Here is is assumed that that usb port number 0 is the control
+	 * port and port 2 is the event port. This assumption will surely
+	 * be false with some devices and better heuristics is needed.
+	 */
+	if (g_strcmp0(num, "00") == 0) {
+		if (primary != 0)
+			return;
+
+		devnode = udev_device_get_devnode(udev_device);
+		ofono_modem_set_string(modem, "Device", devnode);
+
+		primary = 1;
+		ofono_modem_set_integer(modem, "PrimaryRegistered", primary);
+	} else if (g_strcmp0(num, "02") == 0) {
+		if (secondary != 0)
+			return;
+
+		devnode = udev_device_get_devnode(udev_device);
+		ofono_modem_set_string(modem, "SecondaryDevice", devnode);
+
+		secondary = 1;
+		ofono_modem_set_integer(modem, "SecondaryRegistered",
+					secondary);
+	}
+
+	if (primary && secondary)
+		ofono_modem_register(modem);
 }
 
 static void add_em770(struct ofono_modem *modem,