udev: Add support for cleaner modem detection

1 files changed, 591 insertions, 0 deletions

diff --git a/plugins/udevng.c b/plugins/udevng.c
new file mode 100644
index 00000000..6dac3fdc
--- /dev/null
+++ b/plugins/udevng.c
@@ -0,0 +1,591 @@
+/*
+ *
+ *  oFono - Open Source Telephony
+ *
+ *  Copyright (C) 2008-2010  Intel Corporation. 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 version 2 as
+ *  published by the Free Software Foundation.
+ *
+ *  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 St, Fifth Floor, Boston, MA  02110-1301  USA
+ *
+ */
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include <errno.h>
+#include <ctype.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include <libudev.h>
+
+#include <glib.h>
+
+#define OFONO_API_SUBJECT_TO_CHANGE
+#include <ofono/plugin.h>
+#include <ofono/modem.h>
+#include <ofono/log.h>
+
+struct modem_info {
+	char *syspath;
+	char *devname;
+	char *driver;
+	GSList *devices;
+	struct ofono_modem *modem;
+};
+
+struct device_info {
+	char *devpath;
+	char *devnode;
+	char *interface;
+	char *number;
+	char *label;
+};
+
+static gboolean setup_gobi(struct modem_info *modem)
+{
+	const char *device = NULL;
+	GSList *list;
+
+	DBG("%s", modem->syspath);
+
+	for (list = modem->devices; list; list = list->next) {
+		struct device_info *info = list->data;
+
+		DBG("%s %s %s %s", info->devnode, info->interface,
+						info->number, info->label);
+
+		if (g_strcmp0(info->interface, "255/255/255") == 0 &&
+					g_strcmp0(info->number, "02") == 0)
+			device = info->devnode;
+	}
+
+	if (device == NULL)
+		return FALSE;
+
+	DBG("device=%s", device);
+
+	ofono_modem_set_string(modem->modem, "Device", device);
+
+	return TRUE;
+}
+
+static gboolean setup_sierra(struct modem_info *modem)
+{
+	const char *device = NULL;
+	GSList *list;
+
+	DBG("%s", modem->syspath);
+
+	for (list = modem->devices; list; list = list->next) {
+		struct device_info *info = list->data;
+
+		DBG("%s %s %s %s", info->devnode, info->interface,
+						info->number, info->label);
+
+		if (g_strcmp0(info->interface, "255/255/255") == 0 &&
+					g_strcmp0(info->number, "03") == 0)
+			device = info->devnode;
+	}
+
+	if (device == NULL)
+		return FALSE;
+
+	DBG("device=%s", device);
+
+	ofono_modem_set_string(modem->modem, "Device", device);
+
+	return TRUE;
+}
+
+static gboolean setup_huawei(struct modem_info *modem)
+{
+	const char *mdm = NULL, *pcui = NULL;
+	GSList *list;
+
+	DBG("%s", modem->syspath);
+
+	for (list = modem->devices; list; list = list->next) {
+		struct device_info *info = list->data;
+
+		DBG("%s %s %s %s", info->devnode, info->interface,
+						info->number, info->label);
+
+		if (g_strcmp0(info->label, "modem") == 0 ||
+				g_strcmp0(info->interface, "255/1/1") == 0 ||
+				g_strcmp0(info->interface, "255/2/1") == 0)
+			mdm = info->devnode;
+		else if (g_strcmp0(info->label, "pcui") == 0 ||
+				g_strcmp0(info->interface, "255/1/2") == 0 ||
+				g_strcmp0(info->interface, "255/2/2") == 0)
+			pcui = info->devnode;
+		else if (g_strcmp0(info->interface, "255/255/255") == 0) {
+			if (g_strcmp0(info->number, "00") == 0)
+				mdm = info->devnode;
+			else if (g_strcmp0(info->number, "02") == 0)
+				pcui = info->devnode;
+			else if (g_strcmp0(info->number, "03") == 0)
+				pcui = info->devnode;
+			else if (g_strcmp0(info->number, "04") == 0)
+				pcui = info->devnode;
+		}
+	}
+
+	if (mdm == NULL || pcui == NULL)
+		return FALSE;
+
+	DBG("modem=%s pcui=%s", mdm, pcui);
+
+	ofono_modem_set_string(modem->modem, "Modem", mdm);
+	ofono_modem_set_string(modem->modem, "Pcui", pcui);
+
+	return TRUE;
+}
+
+static gboolean setup_novatel(struct modem_info *modem)
+{
+	const char *aux = NULL, *mdm = NULL;
+	GSList *list;
+
+	DBG("%s", modem->syspath);
+
+	for (list = modem->devices; list; list = list->next) {
+		struct device_info *info = list->data;
+
+		DBG("%s %s %s %s", info->devnode, info->interface,
+						info->number, info->label);
+
+		if (g_strcmp0(info->label, "aux") == 0)
+			aux = info->devnode;
+		else if (g_strcmp0(info->label, "modem") == 0)
+			mdm = info->devnode;
+		else if (g_strcmp0(info->interface, "255/255/255") == 0) {
+			if (g_strcmp0(info->number, "00") == 0)
+				aux = info->devnode;
+			else if (g_strcmp0(info->number, "01") == 0)
+				mdm = info->devnode;
+		}
+	}
+
+	if (aux == NULL || mdm == NULL)
+		return FALSE;
+
+	DBG("aux=%s modem=%s", aux, mdm);
+
+	ofono_modem_set_string(modem->modem, "PrimaryDevice", aux);
+	ofono_modem_set_string(modem->modem, "SecondaryDevice", mdm);
+
+	return TRUE;
+}
+
+static gboolean setup_zte(struct modem_info *modem)
+{
+	const char *aux = NULL, *mdm = NULL;
+	GSList *list;
+
+	DBG("%s", modem->syspath);
+
+	for (list = modem->devices; list; list = list->next) {
+		struct device_info *info = list->data;
+
+		DBG("%s %s %s %s", info->devnode, info->interface,
+						info->number, info->label);
+
+		if (g_strcmp0(info->label, "aux") == 0)
+			aux = info->devnode;
+		else if (g_strcmp0(info->label, "modem") == 0)
+			mdm = info->devnode;
+		else if (g_strcmp0(info->interface, "255/255/255") == 0) {
+			if (g_strcmp0(info->number, "01") == 0)
+				aux = info->devnode;
+			else if (g_strcmp0(info->number, "02") == 0)
+				mdm = info->devnode;
+			else if (g_strcmp0(info->number, "03") == 0)
+				mdm = info->devnode;
+		}
+	}
+
+	if (aux == NULL || mdm == NULL)
+		return FALSE;
+
+	DBG("aux=%s modem=%s", aux, mdm);
+
+	ofono_modem_set_string(modem->modem, "Aux", aux);
+	ofono_modem_set_string(modem->modem, "Modem", mdm);
+
+	return TRUE;
+}
+
+static struct {
+	const char *name;
+	gboolean (*setup)(struct modem_info *modem);
+} driver_list[] = {
+	{ "gobi",	setup_gobi	},
+	{ "sierra",	setup_sierra	},
+	{ "huawei",	setup_huawei	},
+	{ "huaweicdma",	setup_huawei	},
+	{ "novatel",	setup_novatel	},
+	{ "zte",	setup_zte	},
+	{ }
+};
+
+static GHashTable *modem_list;
+
+static void destroy_modem(gpointer data)
+{
+	struct modem_info *modem = data;
+	GSList *list;
+
+	DBG("%s", modem->syspath);
+
+	ofono_modem_remove(modem->modem);
+
+	for (list = modem->devices; list; list = list->next) {
+		struct device_info *info = list->data;
+
+		DBG("%s", info->devnode);
+
+		g_free(info->devpath);
+		g_free(info->devnode);
+		g_free(info->interface);
+		g_free(info->number);
+		g_free(info->label);
+		g_free(info);
+
+		list->data = NULL;
+	}
+
+	g_slist_free(modem->devices);
+
+	g_free(modem->syspath);
+	g_free(modem->devname);
+	g_free(modem->driver);
+	g_free(modem);
+}
+
+static gboolean check_remove(gpointer key, gpointer value, gpointer user_data)
+{
+        struct modem_info *modem = value;
+        const char *devpath = user_data;
+	GSList *list;
+
+	for (list = modem->devices; list; list = list->next) {
+		struct device_info *info = list->data;
+
+		if (g_strcmp0(info->devpath, devpath) == 0)
+			return TRUE;
+	}
+
+	return FALSE;
+}
+
+static void remove_device(struct udev_device *device)
+{
+	const char *syspath;
+
+	syspath = udev_device_get_syspath(device);
+	if (syspath == NULL)
+		return;
+
+	DBG("%s", syspath);
+
+	g_hash_table_foreach_remove(modem_list, check_remove, (char *) syspath);
+}
+
+static gint compare_device(gconstpointer a, gconstpointer b)
+{
+	const struct device_info *info1 = a;
+	const struct device_info *info2 = b;
+
+	return g_strcmp0(info1->devnode, info2->devnode);
+}
+
+static void add_device(const char *syspath, const char *devname,
+			const char *driver, struct udev_device *device)
+{
+	struct udev_device *intf;
+	const char *devpath, *devnode, *interface, *number, *label;
+	struct modem_info *modem;
+	struct device_info *info;
+
+	devpath = udev_device_get_syspath(device);
+	if (devpath == NULL)
+		return;
+
+	devnode = udev_device_get_devnode(device);
+	if (devnode == NULL)
+		return;
+
+	intf = udev_device_get_parent_with_subsystem_devtype(device,
+						"usb", "usb_interface");
+	if (intf == NULL)
+		return;
+
+	interface = udev_device_get_property_value(intf, "INTERFACE");
+	number = udev_device_get_sysattr_value(intf, "bInterfaceNumber");
+
+	label = udev_device_get_property_value(device, "OFONO_LABEL");
+
+	DBG("%s", devpath);
+	DBG("%s (%s) %s [%s] ==> %s", devnode, driver,
+					interface, number, label);
+
+	modem = g_hash_table_lookup(modem_list, syspath);
+	if (modem == NULL) {
+		modem = g_try_new0(struct modem_info, 1);
+		if (modem == NULL)
+			return;
+
+		modem->syspath = g_strdup(syspath);
+		modem->devname = g_strdup(devname);
+		modem->driver = g_strdup(driver);
+
+		g_hash_table_replace(modem_list, modem->syspath, modem);
+	}
+
+	info = g_try_new0(struct device_info, 1);
+	if (info == NULL)
+		return;
+
+	info->devpath = g_strdup(devpath);
+	info->devnode = g_strdup(devnode);
+	info->interface = g_strdup(interface);
+	info->number = g_strdup(number);
+	info->label = g_strdup(label);
+
+	modem->devices = g_slist_insert_sorted(modem->devices, info,
+							compare_device);
+}
+
+static void check_device(struct udev_device *device)
+{
+	struct udev_device *usb_device;
+	const char *bus, *driver, *syspath, *devname;
+
+	bus = udev_device_get_property_value(device, "ID_BUS");
+	if (bus == NULL)
+		return;
+
+	if (g_str_equal(bus, "usb") == FALSE)
+		return;
+
+	usb_device = udev_device_get_parent_with_subsystem_devtype(device,
+							"usb", "usb_device");
+	if (usb_device == NULL)
+		return;
+
+	syspath = udev_device_get_syspath(usb_device);
+	if (syspath == NULL)
+		return;
+
+	devname = udev_device_get_devnode(usb_device);
+	if (devname == NULL)
+		return;
+
+	driver = udev_device_get_property_value(usb_device, "OFONO_DRIVER");
+	if (driver == NULL)
+		return;
+
+	add_device(syspath, devname, driver, device);
+}
+
+static void create_modem(gpointer key, gpointer value, gpointer user_data)
+{
+	struct modem_info *modem = value;
+	const char *syspath = key;
+	unsigned int i;
+
+	if (modem->devices == NULL)
+		return;
+
+	if (modem->modem != NULL)
+		return;
+
+	DBG("%s", syspath);
+
+	modem->modem = ofono_modem_create(NULL, modem->driver);
+	if (modem->modem == NULL)
+		return;
+
+	for (i = 0; driver_list[i].name; i++) {
+		if (g_str_equal(driver_list[i].name, modem->driver) == FALSE)
+			continue;
+
+		if (driver_list[i].setup(modem) == TRUE) {
+			ofono_modem_register(modem->modem);
+			return;
+		}
+	}
+
+	ofono_modem_remove(modem->modem);
+	modem->modem = NULL;
+}
+
+static void enumerate_devices(struct udev *context)
+{
+	struct udev_enumerate *enumerate;
+	struct udev_list_entry *entry;
+
+	DBG("");
+
+	enumerate = udev_enumerate_new(context);
+	if (enumerate == NULL)
+		return;
+
+	udev_enumerate_add_match_subsystem(enumerate, "tty");
+	udev_enumerate_add_match_subsystem(enumerate, "net");
+
+	udev_enumerate_scan_devices(enumerate);
+
+	entry = udev_enumerate_get_list_entry(enumerate);
+	while (entry) {
+		const char *syspath = udev_list_entry_get_name(entry);
+		struct udev_device *device;
+
+		device = udev_device_new_from_syspath(context, syspath);
+		if (device != NULL) {
+			check_device(device);
+			udev_device_unref(device);
+		}
+
+		entry = udev_list_entry_get_next(entry);
+	}
+
+	udev_enumerate_unref(enumerate);
+
+	g_hash_table_foreach(modem_list, create_modem, NULL);
+}
+
+static guint udev_delay = 0;
+
+static gboolean check_modem_list(gpointer user_data)
+{
+	udev_delay = 0;
+
+	DBG("");
+
+	g_hash_table_foreach(modem_list, create_modem, NULL);
+
+	return FALSE;
+}
+
+static gboolean udev_event(GIOChannel *channel,
+				GIOCondition condition, gpointer user_data)
+{
+	struct udev_monitor *monitor = user_data;
+	struct udev_device *device;
+	const char *action;
+
+	device = udev_monitor_receive_device(monitor);
+	if (device == NULL)
+		return TRUE;
+
+	action = udev_device_get_action(device);
+	if (action == NULL)
+		return TRUE;
+
+	if (g_str_equal(action, "add") == TRUE) {
+		if (udev_delay > 0)
+			g_source_remove(udev_delay);
+
+		check_device(device);
+
+		udev_delay = g_timeout_add_seconds(1, check_modem_list, NULL);
+	} else if (g_str_equal(action, "remove") == TRUE)
+		remove_device(device);
+
+	udev_device_unref(device);
+
+	return TRUE;
+}
+
+static struct udev *udev_ctx;
+static struct udev_monitor *udev_mon;
+static guint udev_watch = 0;
+
+static void udev_start(void)
+{
+	GIOChannel *channel;
+	int fd;
+
+	DBG("");
+
+	if (udev_monitor_enable_receiving(udev_mon) < 0) {
+		ofono_error("Failed to enable udev monitor");
+		return;
+	}
+
+	enumerate_devices(udev_ctx);
+
+	fd = udev_monitor_get_fd(udev_mon);
+
+	channel = g_io_channel_unix_new(fd);
+	if (channel == NULL)
+		return;
+
+	udev_watch = g_io_add_watch(channel, G_IO_IN, udev_event, udev_mon);
+
+	g_io_channel_unref(channel);
+}
+
+static int detect_init(void)
+{
+	udev_ctx = udev_new();
+	if (udev_ctx == NULL) {
+		ofono_error("Failed to create udev context");
+		return -EIO;
+	}
+
+	udev_mon = udev_monitor_new_from_netlink(udev_ctx, "udev");
+	if (udev_mon == NULL) {
+		ofono_error("Failed to create udev monitor");
+		udev_unref(udev_ctx);
+		udev_ctx = NULL;
+		return -EIO;
+	}
+
+	modem_list = g_hash_table_new_full(g_str_hash, g_str_equal,
+						NULL, destroy_modem);
+
+	udev_monitor_filter_add_match_subsystem_devtype(udev_mon, "tty", NULL);
+	udev_monitor_filter_add_match_subsystem_devtype(udev_mon, "net", NULL);
+
+	udev_monitor_filter_update(udev_mon);
+
+	udev_start();
+
+	return 0;
+}
+
+static void detect_exit(void)
+{
+	if (udev_delay > 0)
+		g_source_remove(udev_delay);
+
+	if (udev_watch > 0)
+		g_source_remove(udev_watch);
+
+	if (udev_ctx == NULL)
+		return;
+
+	udev_monitor_filter_remove(udev_mon);
+
+	g_hash_table_destroy(modem_list);
+
+	udev_monitor_unref(udev_mon);
+	udev_unref(udev_ctx);
+}
+
+OFONO_PLUGIN_DEFINE(udevng, "udev hardware detection", VERSION,
+		OFONO_PLUGIN_PRIORITY_DEFAULT, detect_init, detect_exit)