Esempio n. 1
0
/**
 *	bus_add_driver - Add a driver to the bus.
 *	@drv:	driver.
 *
 */
int bus_add_driver(struct device_driver * drv)
{
	struct bus_type * bus = get_bus(drv->bus);
	int error = 0;

	if (bus) {
		pr_debug("bus %s: add driver %s\n", bus->name, drv->name);
		error = kobject_set_name(&drv->kobj, "%s", drv->name);
		if (error) {
			put_bus(bus);
			return error;
		}
		drv->kobj.kset = &bus->drivers;
		if ((error = kobject_register(&drv->kobj))) {
			put_bus(bus);
			return error;
		}

		driver_attach(drv);
		klist_add_tail(&drv->knode_bus, &bus->klist_drivers);
		module_add_driver(drv->owner, drv);

		driver_add_attrs(bus, drv);
		add_bind_files(drv);
	}
	return error;
}
Esempio n. 2
0
/*
 * Manually attach a device to a driver.
 * Note: the driver must want to bind to the device,
 * it is not possible to override the driver's id table.
 */
static ssize_t driver_bind(struct device_driver *drv,
			   const char *buf, size_t count)
{
	struct bus_type *bus = get_bus(drv->bus);
	struct device *dev;
	int err = -ENODEV;

	dev = bus_find_device(bus, NULL, (void *)buf, driver_helper);
	if (dev && dev->driver == NULL) {
		if (dev->parent)	/* Needed for USB */
			down(&dev->parent->sem);
		down(&dev->sem);
		err = driver_probe_device(drv, dev);
		up(&dev->sem);
		if (dev->parent)
			up(&dev->parent->sem);

		if (err > 0) 		/* success */
			err = count;
		else if (err == 0)	/* driver didn't accept device */
			err = -ENODEV;
	}
	put_device(dev);
	put_bus(bus);
	return err;
}
Esempio n. 3
0
/**
 *	bus_add_device - add device to bus
 *	@dev:	device being added
 *
 *	- Add the device to its bus's list of devices.
 *	- Create link to device's bus.
 */
int bus_add_device(struct device * dev)
{
	struct bus_type * bus = get_bus(dev->bus);
	int error = 0;

	if (bus) {
		pr_debug("bus %s: add device %s\n", bus->name, dev->bus_id);
		error = device_add_attrs(bus, dev);
		if (error)
			goto out_put;
		error = sysfs_create_link(&bus->devices.kobj,
						&dev->kobj, dev->bus_id);
		if (error)
			goto out_id;
		error = sysfs_create_link(&dev->kobj,
				&dev->bus->subsys.kset.kobj, "subsystem");
		if (error)
			goto out_subsys;
		error = make_deprecated_bus_links(dev);
		if (error)
			goto out_deprecated;
	}
	return 0;

out_deprecated:
	sysfs_remove_link(&dev->kobj, "subsystem");
out_subsys:
	sysfs_remove_link(&bus->devices.kobj, dev->bus_id);
out_id:
	device_remove_attrs(bus, dev);
out_put:
	put_bus(dev->bus);
	return error;
}
Esempio n. 4
0
void bus_remove_file(struct bus_type * bus, struct bus_attribute * attr)
{
	if (get_bus(bus)) {
		sysfs_remove_file(&bus->subsys.kset.kobj, &attr->attr);
		put_bus(bus);
	}
}
Esempio n. 5
0
static void get_parameters(void)
{
	int vid;

	/* HZ */
	boot_params.nucleos_kludge.system_hz = HZ;

	if (processor == 1586)
		processor = 686;

	boot_params.nucleos_kludge.processor = processor;

	/* bus */
	if (get_bus())
		boot_params.nucleos_kludge.pc_at = 1;

	/* video */
	vid = get_video();
	if (vid == 2 || vid == 3)
		boot_params.nucleos_kludge.vdu_ega = 1;
	else
		boot_params.nucleos_kludge.vdu_vga = 1;

	/* memory */
	memcpy(boot_params.nucleos_kludge.mem, mem, sizeof(boot_params.nucleos_kludge.mem));

	return;
}
Esempio n. 6
0
int bus_create_file(struct bus_type * bus, struct bus_attribute * attr)
{
	int error;
	if (get_bus(bus)) {
		error = sysfs_create_file(&bus->subsys.kset.kobj, &attr->attr);
		put_bus(bus);
	} else
		error = -EINVAL;
	return error;
}
Esempio n. 7
0
/**
 *	bus_add_device - add device to bus
 *	@dev:	device being added
 *
 *	- Add the device to its bus's list of devices.
 *	- Create link to device's bus.
 */
int bus_add_device(struct device * dev)
{
	struct bus_type * bus = get_bus(dev->bus);
	int error = 0;

	if (bus) {
		pr_debug("bus %s: add device %s\n", bus->name, dev->bus_id);
		error = device_add_attrs(bus, dev);
		if (!error) {
			sysfs_create_link(&bus->devices.kobj, &dev->kobj, dev->bus_id);
			sysfs_create_link(&dev->kobj, &dev->bus->subsys.kset.kobj, "subsystem");
			sysfs_create_link(&dev->kobj, &dev->bus->subsys.kset.kobj, "bus");
		}
	}
	return error;
}
Esempio n. 8
0
static ssize_t driver_unbind(struct device_driver *drv,
			     const char *buf, size_t count)
{
	struct bus_type *bus = get_bus(drv->bus);
	struct device *dev;
	int err = -ENODEV;

	dev = bus_find_device(bus, NULL, (void *)buf, driver_helper);
	if (dev && dev->driver == drv) {
		device_release_driver(dev);
		err = count;
	}
	put_device(dev);
	put_bus(bus);
	return err;
}
Esempio n. 9
0
/*
 * Manually attach a device to a driver.
 * Note: the driver must want to bind to the device,
 * it is not possible to override the driver's id table.
 */
static ssize_t driver_bind(struct device_driver *drv,
			   const char *buf, size_t count)
{
	struct bus_type *bus = get_bus(drv->bus);
	struct device *dev;
	int err = -ENODEV;

	dev = bus_find_device(bus, NULL, (void *)buf, driver_helper);
	if (dev && dev->driver == NULL) {
		down(&dev->sem);
		err = driver_probe_device(drv, dev);
		up(&dev->sem);
	}
	put_device(dev);
	put_bus(bus);
	return err;
}
Esempio n. 10
0
static int __bus_for_each_dev(struct bus_type *bus, struct device *start,
			      void *data, int (*fn)(struct device *, void *))
{
	struct list_head *head;
	struct device *dev;
	int error = 0;

	if (!(bus = get_bus(bus)))
		return -EINVAL;

	head = &bus->devices.list;
	dev = list_prepare_entry(start, head, bus_list);
	list_for_each_entry_continue(dev, head, bus_list) {
		get_device(dev);
		error = fn(dev, data);
		put_device(dev);
		if (error)
			break;
	}
Esempio n. 11
0
/**
 *	bus_add_driver - Add a driver to the bus.
 *	@drv:	driver.
 *
 */
int bus_add_driver(struct device_driver *drv)
{
	struct bus_type * bus = get_bus(drv->bus);
	int error = 0;

	if (!bus)
		return 0;

	pr_debug("bus %s: add driver %s\n", bus->name, drv->name);
	error = kobject_set_name(&drv->kobj, "%s", drv->name);
	if (error)
		goto out_put_bus;
	drv->kobj.kset = &bus->drivers;
	if ((error = kobject_register(&drv->kobj)))
		goto out_put_bus;

	error = driver_attach(drv);
	if (error)
		goto out_unregister;
	klist_add_tail(&drv->knode_bus, &bus->klist_drivers);
	module_add_driver(drv->owner, drv);

	error = driver_add_attrs(bus, drv);
	if (error) {
		/* How the hell do we get out of this pickle? Give up */
		printk(KERN_ERR "%s: driver_add_attrs(%s) failed\n",
			__FUNCTION__, drv->name);
	}
	error = add_bind_files(drv);
	if (error) {
		/* Ditto */
		printk(KERN_ERR "%s: add_bind_files(%s) failed\n",
			__FUNCTION__, drv->name);
	}

	return error;
out_unregister:
	kobject_unregister(&drv->kobj);
out_put_bus:
	put_bus(bus);
	return error;
}
Esempio n. 12
0
static gboolean
get_device_info (const char            *path,
		 int                   *vendor_id,
		 int                   *product_id,
		 char                 **name,
		 WacomBusType          *bus,
		 WacomIntegrationFlags *integration_flags,
		 WacomError            *error)
{
	GUdevClient *client;
	GUdevDevice *device;
	const char * const subsystems[] = { "input", NULL };
	gboolean retval;
	char *bus_str;
	const char *devname;

#if NEED_G_TYPE_INIT
	g_type_init();
#endif

	retval = FALSE;
	/* The integration flags from device info are unset by default */
	*integration_flags = WACOM_DEVICE_INTEGRATED_UNSET;
	*name = NULL;
	bus_str = NULL;
	client = g_udev_client_new (subsystems);
	device = g_udev_client_query_by_device_file (client, path);
	if (device == NULL) {
		libwacom_error_set(error, WERROR_INVALID_PATH, "Could not find device '%s' in udev", path);
		goto out;
	}

	/* Touchpads are only for the "Finger" part of Bamboo devices */
	if (!is_tablet_or_touchpad(device)) {
		GUdevDevice *parent;

		parent = g_udev_device_get_parent(device);
		if (!parent || !is_tablet_or_touchpad(parent)) {
			libwacom_error_set(error, WERROR_INVALID_PATH, "Device '%s' is not a tablet", path);
			g_object_unref (parent);
			goto out;
		}
		g_object_unref (parent);
	}

	/* Is the device integrated in display? */
	devname = g_udev_device_get_name (device);
	if (devname != NULL) {
		char *sysfs_path, *contents;

		sysfs_path = g_build_filename ("/sys/class/input", devname, "device/properties", NULL);
		if (g_file_get_contents (sysfs_path, &contents, NULL, NULL)) {
			int flag;

			flag = atoi(contents);
			flag &= (1 << INPUT_PROP_DIRECT) | (1 << INPUT_PROP_POINTER);
			/*
			 * To ensure we are dealing with a screen tablet, need
			 * to check that it has DIRECT and non-POINTER (DIRECT
			 * alone is not sufficient since it's set for drawing
			 * tablets as well)
			 */
			if (flag == (1 << INPUT_PROP_DIRECT))
				*integration_flags = WACOM_DEVICE_INTEGRATED_DISPLAY;
			else
				*integration_flags = WACOM_DEVICE_INTEGRATED_NONE;

			g_free (contents);
		}
		g_free (sysfs_path);
	}

	*name = g_strdup (g_udev_device_get_sysfs_attr (device, "name"));
	/* Try getting the name from the parent if that fails */
	if (*name == NULL) {
		GUdevDevice *parent;

		parent = g_udev_device_get_parent (device);
		if (!parent)
			goto out;
		*name = g_strdup (g_udev_device_get_sysfs_attr (parent, "name"));
		g_object_unref (parent);
	}

	/* Parse the PRODUCT attribute (for Bluetooth, USB, I2C) */
	retval = get_bus_vid_pid (device, bus, vendor_id, product_id, error);
	if (retval)
		goto out;

	bus_str = get_bus (device);
	*bus = bus_from_str (bus_str);

	if (*bus == WBUSTYPE_SERIAL) {
		/* The serial bus uses 0:0 as the vid/pid */
		*vendor_id = 0;
		*product_id = 0;
		retval = TRUE;
	} else {
		libwacom_error_set(error, WERROR_UNKNOWN_MODEL, "Unsupported bus '%s'", bus_str);
	}

out:
	if (bus_str != NULL)
		g_free (bus_str);
	if (retval == FALSE)
		g_free (*name);
	if (device != NULL)
		g_object_unref (device);
	if (client != NULL)
		g_object_unref (client);
	return retval;
}